elf32-ppc.c revision 1.9 1 1.1 christos /* PowerPC-specific support for 32-bit ELF
2 1.9 christos Copyright (C) 1994-2020 Free Software Foundation, Inc.
3 1.1 christos Written by Ian Lance Taylor, Cygnus Support.
4 1.1 christos
5 1.1 christos This file is part of BFD, the Binary File Descriptor library.
6 1.1 christos
7 1.1 christos This program is free software; you can redistribute it and/or modify
8 1.1 christos it under the terms of the GNU General Public License as published by
9 1.1 christos the Free Software Foundation; either version 3 of the License, or
10 1.1 christos (at your option) any later version.
11 1.1 christos
12 1.1 christos This program is distributed in the hope that it will be useful,
13 1.1 christos but WITHOUT ANY WARRANTY; without even the implied warranty of
14 1.1 christos MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 1.1 christos GNU General Public License for more details.
16 1.1 christos
17 1.1 christos You should have received a copy of the GNU General Public License
18 1.1 christos along with this program; if not, write to the
19 1.1 christos Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 1.1 christos Boston, MA 02110-1301, USA. */
21 1.1 christos
22 1.1 christos
23 1.1 christos /* This file is based on a preliminary PowerPC ELF ABI. The
24 1.1 christos information may not match the final PowerPC ELF ABI. It includes
25 1.1 christos suggestions from the in-progress Embedded PowerPC ABI, and that
26 1.1 christos information may also not match. */
27 1.1 christos
28 1.1 christos #include "sysdep.h"
29 1.1 christos #include <stdarg.h>
30 1.1 christos #include "bfd.h"
31 1.1 christos #include "bfdlink.h"
32 1.1 christos #include "libbfd.h"
33 1.1 christos #include "elf-bfd.h"
34 1.1 christos #include "elf/ppc.h"
35 1.1 christos #include "elf32-ppc.h"
36 1.1 christos #include "elf-vxworks.h"
37 1.1 christos #include "dwarf2.h"
38 1.7 christos #include "opcode/ppc.h"
39 1.1 christos
40 1.9 christos /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
41 1.9 christos #define OCTETS_PER_BYTE(ABFD, SEC) 1
42 1.9 christos
43 1.1 christos typedef enum split16_format_type
44 1.1 christos {
45 1.1 christos split16a_type = 0,
46 1.1 christos split16d_type
47 1.1 christos }
48 1.1 christos split16_format_type;
49 1.1 christos
50 1.1 christos /* RELA relocations are used here. */
51 1.1 christos
52 1.1 christos static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
53 1.1 christos (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 1.1 christos static bfd_reloc_status_type ppc_elf_unhandled_reloc
55 1.1 christos (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 1.1 christos
57 1.1 christos /* Branch prediction bit for branch taken relocs. */
58 1.1 christos #define BRANCH_PREDICT_BIT 0x200000
59 1.1 christos /* Mask to set RA in memory instructions. */
60 1.1 christos #define RA_REGISTER_MASK 0x001f0000
61 1.1 christos /* Value to shift register by to insert RA. */
62 1.1 christos #define RA_REGISTER_SHIFT 16
63 1.1 christos
64 1.1 christos /* The name of the dynamic interpreter. This is put in the .interp
65 1.1 christos section. */
66 1.1 christos #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
67 1.1 christos
68 1.1 christos /* For old-style PLT. */
69 1.1 christos /* The number of single-slot PLT entries (the rest use two slots). */
70 1.1 christos #define PLT_NUM_SINGLE_ENTRIES 8192
71 1.1 christos
72 1.1 christos /* For new-style .glink and .plt. */
73 1.1 christos #define GLINK_PLTRESOLVE 16*4
74 1.7 christos #define GLINK_ENTRY_SIZE(htab, h) \
75 1.7 christos ((4*4 \
76 1.7 christos + (h != NULL \
77 1.7 christos && h == htab->tls_get_addr \
78 1.7 christos && !htab->params->no_tls_get_addr_opt ? 8*4 : 0) \
79 1.7 christos + (1u << htab->params->plt_stub_align) - 1) \
80 1.7 christos & -(1u << htab->params->plt_stub_align))
81 1.1 christos
82 1.1 christos /* VxWorks uses its own plt layout, filled in by the static linker. */
83 1.1 christos
84 1.1 christos /* The standard VxWorks PLT entry. */
85 1.1 christos #define VXWORKS_PLT_ENTRY_SIZE 32
86 1.1 christos static const bfd_vma ppc_elf_vxworks_plt_entry
87 1.1 christos [VXWORKS_PLT_ENTRY_SIZE / 4] =
88 1.1 christos {
89 1.7 christos 0x3d800000, /* lis r12,0 */
90 1.7 christos 0x818c0000, /* lwz r12,0(r12) */
91 1.7 christos 0x7d8903a6, /* mtctr r12 */
92 1.7 christos 0x4e800420, /* bctr */
93 1.7 christos 0x39600000, /* li r11,0 */
94 1.7 christos 0x48000000, /* b 14 <.PLT0resolve+0x4> */
95 1.7 christos 0x60000000, /* nop */
96 1.7 christos 0x60000000, /* nop */
97 1.1 christos };
98 1.1 christos static const bfd_vma ppc_elf_vxworks_pic_plt_entry
99 1.1 christos [VXWORKS_PLT_ENTRY_SIZE / 4] =
100 1.1 christos {
101 1.1 christos 0x3d9e0000, /* addis r12,r30,0 */
102 1.1 christos 0x818c0000, /* lwz r12,0(r12) */
103 1.1 christos 0x7d8903a6, /* mtctr r12 */
104 1.1 christos 0x4e800420, /* bctr */
105 1.1 christos 0x39600000, /* li r11,0 */
106 1.1 christos 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
107 1.1 christos 0x60000000, /* nop */
108 1.1 christos 0x60000000, /* nop */
109 1.1 christos };
110 1.1 christos
111 1.1 christos /* The initial VxWorks PLT entry. */
112 1.1 christos #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
113 1.1 christos static const bfd_vma ppc_elf_vxworks_plt0_entry
114 1.1 christos [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
115 1.1 christos {
116 1.7 christos 0x3d800000, /* lis r12,0 */
117 1.7 christos 0x398c0000, /* addi r12,r12,0 */
118 1.7 christos 0x800c0008, /* lwz r0,8(r12) */
119 1.7 christos 0x7c0903a6, /* mtctr r0 */
120 1.7 christos 0x818c0004, /* lwz r12,4(r12) */
121 1.7 christos 0x4e800420, /* bctr */
122 1.7 christos 0x60000000, /* nop */
123 1.7 christos 0x60000000, /* nop */
124 1.1 christos };
125 1.1 christos static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
126 1.1 christos [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
127 1.1 christos {
128 1.1 christos 0x819e0008, /* lwz r12,8(r30) */
129 1.7 christos 0x7d8903a6, /* mtctr r12 */
130 1.1 christos 0x819e0004, /* lwz r12,4(r30) */
131 1.7 christos 0x4e800420, /* bctr */
132 1.7 christos 0x60000000, /* nop */
133 1.7 christos 0x60000000, /* nop */
134 1.7 christos 0x60000000, /* nop */
135 1.7 christos 0x60000000, /* nop */
136 1.1 christos };
137 1.1 christos
138 1.1 christos /* For executables, we have some additional relocations in
139 1.1 christos .rela.plt.unloaded, for the kernel loader. */
140 1.1 christos
141 1.1 christos /* The number of non-JMP_SLOT relocations per PLT0 slot. */
142 1.1 christos #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
143 1.1 christos /* The number of relocations in the PLTResolve slot. */
144 1.1 christos #define VXWORKS_PLTRESOLVE_RELOCS 2
145 1.7 christos /* The number of relocations in the PLTResolve slot when creating
146 1.1 christos a shared library. */
147 1.1 christos #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
148 1.1 christos
149 1.1 christos /* Some instructions. */
150 1.1 christos #define ADDIS_11_11 0x3d6b0000
151 1.1 christos #define ADDIS_11_30 0x3d7e0000
152 1.1 christos #define ADDIS_12_12 0x3d8c0000
153 1.1 christos #define ADDI_11_11 0x396b0000
154 1.1 christos #define ADD_0_11_11 0x7c0b5a14
155 1.1 christos #define ADD_3_12_2 0x7c6c1214
156 1.1 christos #define ADD_11_0_11 0x7d605a14
157 1.1 christos #define B 0x48000000
158 1.3 christos #define BA 0x48000002
159 1.1 christos #define BCL_20_31 0x429f0005
160 1.1 christos #define BCTR 0x4e800420
161 1.1 christos #define BEQLR 0x4d820020
162 1.1 christos #define CMPWI_11_0 0x2c0b0000
163 1.1 christos #define LIS_11 0x3d600000
164 1.1 christos #define LIS_12 0x3d800000
165 1.1 christos #define LWZU_0_12 0x840c0000
166 1.1 christos #define LWZ_0_12 0x800c0000
167 1.1 christos #define LWZ_11_3 0x81630000
168 1.1 christos #define LWZ_11_11 0x816b0000
169 1.1 christos #define LWZ_11_30 0x817e0000
170 1.1 christos #define LWZ_12_3 0x81830000
171 1.1 christos #define LWZ_12_12 0x818c0000
172 1.1 christos #define MR_0_3 0x7c601b78
173 1.1 christos #define MR_3_0 0x7c030378
174 1.1 christos #define MFLR_0 0x7c0802a6
175 1.1 christos #define MFLR_12 0x7d8802a6
176 1.1 christos #define MTCTR_0 0x7c0903a6
177 1.1 christos #define MTCTR_11 0x7d6903a6
178 1.1 christos #define MTLR_0 0x7c0803a6
179 1.1 christos #define NOP 0x60000000
180 1.1 christos #define SUB_11_11_12 0x7d6c5850
181 1.1 christos
182 1.1 christos /* Offset of tp and dtp pointers from start of TLS block. */
183 1.1 christos #define TP_OFFSET 0x7000
184 1.1 christos #define DTP_OFFSET 0x8000
185 1.1 christos
186 1.1 christos /* The value of a defined global symbol. */
187 1.1 christos #define SYM_VAL(SYM) \
188 1.1 christos ((SYM)->root.u.def.section->output_section->vma \
189 1.1 christos + (SYM)->root.u.def.section->output_offset \
190 1.1 christos + (SYM)->root.u.def.value)
191 1.1 christos
192 1.9 christos /* Relocation HOWTO's. */
194 1.9 christos /* Like other ELF RELA targets that don't apply multiple
195 1.9 christos field-altering relocations to the same localation, src_mask is
196 1.9 christos always zero and pcrel_offset is the same as pc_relative.
197 1.9 christos PowerPC can always use a zero bitpos, even when the field is not at
198 1.9 christos the LSB. For example, a REL24 could use rightshift=2, bisize=24
199 1.9 christos and bitpos=2 which matches the ABI description, or as we do here,
200 1.9 christos rightshift=0, bitsize=26 and bitpos=0. */
201 1.9 christos #define HOW(type, size, bitsize, mask, rightshift, pc_relative, \
202 1.9 christos complain, special_func) \
203 1.9 christos HOWTO (type, rightshift, size, bitsize, pc_relative, 0, \
204 1.9 christos complain_overflow_ ## complain, special_func, \
205 1.9 christos #type, FALSE, 0, mask, pc_relative)
206 1.1 christos
207 1.1 christos static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
208 1.1 christos
209 1.1 christos static reloc_howto_type ppc_elf_howto_raw[] = {
210 1.9 christos /* This reloc does nothing. */
211 1.9 christos HOW (R_PPC_NONE, 3, 0, 0, 0, FALSE, dont,
212 1.1 christos bfd_elf_generic_reloc),
213 1.1 christos
214 1.9 christos /* A standard 32 bit relocation. */
215 1.9 christos HOW (R_PPC_ADDR32, 2, 32, 0xffffffff, 0, FALSE, dont,
216 1.1 christos bfd_elf_generic_reloc),
217 1.1 christos
218 1.1 christos /* An absolute 26 bit branch; the lower two bits must be zero.
219 1.9 christos FIXME: we don't check that, we just clear them. */
220 1.9 christos HOW (R_PPC_ADDR24, 2, 26, 0x3fffffc, 0, FALSE, signed,
221 1.1 christos bfd_elf_generic_reloc),
222 1.1 christos
223 1.9 christos /* A standard 16 bit relocation. */
224 1.9 christos HOW (R_PPC_ADDR16, 1, 16, 0xffff, 0, FALSE, bitfield,
225 1.1 christos bfd_elf_generic_reloc),
226 1.1 christos
227 1.9 christos /* A 16 bit relocation without overflow. */
228 1.9 christos HOW (R_PPC_ADDR16_LO, 1, 16, 0xffff, 0, FALSE, dont,
229 1.1 christos bfd_elf_generic_reloc),
230 1.1 christos
231 1.9 christos /* The high order 16 bits of an address. */
232 1.9 christos HOW (R_PPC_ADDR16_HI, 1, 16, 0xffff, 16, FALSE, dont,
233 1.1 christos bfd_elf_generic_reloc),
234 1.1 christos
235 1.1 christos /* The high order 16 bits of an address, plus 1 if the contents of
236 1.9 christos the low 16 bits, treated as a signed number, is negative. */
237 1.9 christos HOW (R_PPC_ADDR16_HA, 1, 16, 0xffff, 16, FALSE, dont,
238 1.1 christos ppc_elf_addr16_ha_reloc),
239 1.1 christos
240 1.1 christos /* An absolute 16 bit branch; the lower two bits must be zero.
241 1.9 christos FIXME: we don't check that, we just clear them. */
242 1.9 christos HOW (R_PPC_ADDR14, 2, 16, 0xfffc, 0, FALSE, signed,
243 1.1 christos bfd_elf_generic_reloc),
244 1.1 christos
245 1.1 christos /* An absolute 16 bit branch, for which bit 10 should be set to
246 1.1 christos indicate that the branch is expected to be taken. The lower two
247 1.9 christos bits must be zero. */
248 1.9 christos HOW (R_PPC_ADDR14_BRTAKEN, 2, 16, 0xfffc, 0, FALSE, signed,
249 1.1 christos bfd_elf_generic_reloc),
250 1.1 christos
251 1.1 christos /* An absolute 16 bit branch, for which bit 10 should be set to
252 1.1 christos indicate that the branch is not expected to be taken. The lower
253 1.9 christos two bits must be zero. */
254 1.9 christos HOW (R_PPC_ADDR14_BRNTAKEN, 2, 16, 0xfffc, 0, FALSE, signed,
255 1.1 christos bfd_elf_generic_reloc),
256 1.1 christos
257 1.9 christos /* A relative 26 bit branch; the lower two bits must be zero. */
258 1.9 christos HOW (R_PPC_REL24, 2, 26, 0x3fffffc, 0, TRUE, signed,
259 1.1 christos bfd_elf_generic_reloc),
260 1.1 christos
261 1.9 christos /* A relative 16 bit branch; the lower two bits must be zero. */
262 1.9 christos HOW (R_PPC_REL14, 2, 16, 0xfffc, 0, TRUE, signed,
263 1.1 christos bfd_elf_generic_reloc),
264 1.1 christos
265 1.1 christos /* A relative 16 bit branch. Bit 10 should be set to indicate that
266 1.1 christos the branch is expected to be taken. The lower two bits must be
267 1.9 christos zero. */
268 1.9 christos HOW (R_PPC_REL14_BRTAKEN, 2, 16, 0xfffc, 0, TRUE, signed,
269 1.1 christos bfd_elf_generic_reloc),
270 1.1 christos
271 1.1 christos /* A relative 16 bit branch. Bit 10 should be set to indicate that
272 1.1 christos the branch is not expected to be taken. The lower two bits must
273 1.9 christos be zero. */
274 1.9 christos HOW (R_PPC_REL14_BRNTAKEN, 2, 16, 0xfffc, 0, TRUE, signed,
275 1.1 christos bfd_elf_generic_reloc),
276 1.1 christos
277 1.1 christos /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
278 1.9 christos symbol. */
279 1.9 christos HOW (R_PPC_GOT16, 1, 16, 0xffff, 0, FALSE, signed,
280 1.1 christos ppc_elf_unhandled_reloc),
281 1.1 christos
282 1.1 christos /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
283 1.9 christos the symbol. */
284 1.9 christos HOW (R_PPC_GOT16_LO, 1, 16, 0xffff, 0, FALSE, dont,
285 1.1 christos ppc_elf_unhandled_reloc),
286 1.1 christos
287 1.1 christos /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
288 1.9 christos the symbol. */
289 1.9 christos HOW (R_PPC_GOT16_HI, 1, 16, 0xffff, 16, FALSE, dont,
290 1.1 christos ppc_elf_unhandled_reloc),
291 1.1 christos
292 1.1 christos /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
293 1.9 christos the symbol. */
294 1.9 christos HOW (R_PPC_GOT16_HA, 1, 16, 0xffff, 16, FALSE, dont,
295 1.1 christos ppc_elf_unhandled_reloc),
296 1.1 christos
297 1.1 christos /* Like R_PPC_REL24, but referring to the procedure linkage table
298 1.9 christos entry for the symbol. */
299 1.9 christos HOW (R_PPC_PLTREL24, 2, 26, 0x3fffffc, 0, TRUE, signed,
300 1.1 christos ppc_elf_unhandled_reloc),
301 1.1 christos
302 1.1 christos /* This is used only by the dynamic linker. The symbol should exist
303 1.1 christos both in the object being run and in some shared library. The
304 1.1 christos dynamic linker copies the data addressed by the symbol from the
305 1.1 christos shared library into the object, because the object being
306 1.9 christos run has to have the data at some particular address. */
307 1.9 christos HOW (R_PPC_COPY, 2, 32, 0, 0, FALSE, dont,
308 1.1 christos ppc_elf_unhandled_reloc),
309 1.1 christos
310 1.1 christos /* Like R_PPC_ADDR32, but used when setting global offset table
311 1.9 christos entries. */
312 1.9 christos HOW (R_PPC_GLOB_DAT, 2, 32, 0xffffffff, 0, FALSE, dont,
313 1.1 christos ppc_elf_unhandled_reloc),
314 1.1 christos
315 1.9 christos /* Marks a procedure linkage table entry for a symbol. */
316 1.9 christos HOW (R_PPC_JMP_SLOT, 2, 32, 0, 0, FALSE, dont,
317 1.1 christos ppc_elf_unhandled_reloc),
318 1.1 christos
319 1.1 christos /* Used only by the dynamic linker. When the object is run, this
320 1.1 christos longword is set to the load address of the object, plus the
321 1.9 christos addend. */
322 1.9 christos HOW (R_PPC_RELATIVE, 2, 32, 0xffffffff, 0, FALSE, dont,
323 1.1 christos bfd_elf_generic_reloc),
324 1.1 christos
325 1.1 christos /* Like R_PPC_REL24, but uses the value of the symbol within the
326 1.1 christos object rather than the final value. Normally used for
327 1.9 christos _GLOBAL_OFFSET_TABLE_. */
328 1.9 christos HOW (R_PPC_LOCAL24PC, 2, 26, 0x3fffffc, 0, TRUE, signed,
329 1.1 christos bfd_elf_generic_reloc),
330 1.1 christos
331 1.9 christos /* Like R_PPC_ADDR32, but may be unaligned. */
332 1.9 christos HOW (R_PPC_UADDR32, 2, 32, 0xffffffff, 0, FALSE, dont,
333 1.1 christos bfd_elf_generic_reloc),
334 1.1 christos
335 1.9 christos /* Like R_PPC_ADDR16, but may be unaligned. */
336 1.9 christos HOW (R_PPC_UADDR16, 1, 16, 0xffff, 0, FALSE, bitfield,
337 1.1 christos bfd_elf_generic_reloc),
338 1.1 christos
339 1.9 christos /* 32-bit PC relative */
340 1.9 christos HOW (R_PPC_REL32, 2, 32, 0xffffffff, 0, TRUE, dont,
341 1.1 christos bfd_elf_generic_reloc),
342 1.1 christos
343 1.1 christos /* 32-bit relocation to the symbol's procedure linkage table.
344 1.9 christos FIXME: not supported. */
345 1.9 christos HOW (R_PPC_PLT32, 2, 32, 0, 0, FALSE, dont,
346 1.1 christos ppc_elf_unhandled_reloc),
347 1.1 christos
348 1.1 christos /* 32-bit PC relative relocation to the symbol's procedure linkage table.
349 1.9 christos FIXME: not supported. */
350 1.9 christos HOW (R_PPC_PLTREL32, 2, 32, 0, 0, TRUE, dont,
351 1.1 christos ppc_elf_unhandled_reloc),
352 1.1 christos
353 1.1 christos /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
354 1.9 christos the symbol. */
355 1.9 christos HOW (R_PPC_PLT16_LO, 1, 16, 0xffff, 0, FALSE, dont,
356 1.1 christos ppc_elf_unhandled_reloc),
357 1.1 christos
358 1.1 christos /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
359 1.9 christos the symbol. */
360 1.9 christos HOW (R_PPC_PLT16_HI, 1, 16, 0xffff, 16, FALSE, dont,
361 1.1 christos ppc_elf_unhandled_reloc),
362 1.1 christos
363 1.1 christos /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
364 1.9 christos the symbol. */
365 1.9 christos HOW (R_PPC_PLT16_HA, 1, 16, 0xffff, 16, FALSE, dont,
366 1.1 christos ppc_elf_unhandled_reloc),
367 1.1 christos
368 1.1 christos /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
369 1.9 christos small data items. */
370 1.9 christos HOW (R_PPC_SDAREL16, 1, 16, 0xffff, 0, FALSE, signed,
371 1.1 christos ppc_elf_unhandled_reloc),
372 1.1 christos
373 1.9 christos /* 16-bit section relative relocation. */
374 1.9 christos HOW (R_PPC_SECTOFF, 1, 16, 0xffff, 0, FALSE, signed,
375 1.1 christos ppc_elf_unhandled_reloc),
376 1.1 christos
377 1.9 christos /* 16-bit lower half section relative relocation. */
378 1.9 christos HOW (R_PPC_SECTOFF_LO, 1, 16, 0xffff, 0, FALSE, dont,
379 1.1 christos ppc_elf_unhandled_reloc),
380 1.1 christos
381 1.9 christos /* 16-bit upper half section relative relocation. */
382 1.9 christos HOW (R_PPC_SECTOFF_HI, 1, 16, 0xffff, 16, FALSE, dont,
383 1.1 christos ppc_elf_unhandled_reloc),
384 1.1 christos
385 1.9 christos /* 16-bit upper half adjusted section relative relocation. */
386 1.9 christos HOW (R_PPC_SECTOFF_HA, 1, 16, 0xffff, 16, FALSE, dont,
387 1.1 christos ppc_elf_unhandled_reloc),
388 1.1 christos
389 1.9 christos /* Marker relocs for TLS. */
390 1.9 christos HOW (R_PPC_TLS, 2, 32, 0, 0, FALSE, dont,
391 1.9 christos bfd_elf_generic_reloc),
392 1.9 christos
393 1.9 christos HOW (R_PPC_TLSGD, 2, 32, 0, 0, FALSE, dont,
394 1.9 christos bfd_elf_generic_reloc),
395 1.9 christos
396 1.9 christos HOW (R_PPC_TLSLD, 2, 32, 0, 0, FALSE, dont,
397 1.1 christos bfd_elf_generic_reloc),
398 1.7 christos
399 1.9 christos /* Marker relocs on inline plt call instructions. */
400 1.9 christos HOW (R_PPC_PLTSEQ, 2, 32, 0, 0, FALSE, dont,
401 1.9 christos bfd_elf_generic_reloc),
402 1.9 christos
403 1.9 christos HOW (R_PPC_PLTCALL, 2, 32, 0, 0, FALSE, dont,
404 1.7 christos bfd_elf_generic_reloc),
405 1.1 christos
406 1.1 christos /* Computes the load module index of the load module that contains the
407 1.9 christos definition of its TLS sym. */
408 1.9 christos HOW (R_PPC_DTPMOD32, 2, 32, 0xffffffff, 0, FALSE, dont,
409 1.1 christos ppc_elf_unhandled_reloc),
410 1.1 christos
411 1.1 christos /* Computes a dtv-relative displacement, the difference between the value
412 1.1 christos of sym+add and the base address of the thread-local storage block that
413 1.9 christos contains the definition of sym, minus 0x8000. */
414 1.9 christos HOW (R_PPC_DTPREL32, 2, 32, 0xffffffff, 0, FALSE, dont,
415 1.1 christos ppc_elf_unhandled_reloc),
416 1.1 christos
417 1.9 christos /* A 16 bit dtprel reloc. */
418 1.9 christos HOW (R_PPC_DTPREL16, 1, 16, 0xffff, 0, FALSE, signed,
419 1.1 christos ppc_elf_unhandled_reloc),
420 1.1 christos
421 1.9 christos /* Like DTPREL16, but no overflow. */
422 1.9 christos HOW (R_PPC_DTPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
423 1.1 christos ppc_elf_unhandled_reloc),
424 1.1 christos
425 1.9 christos /* Like DTPREL16_LO, but next higher group of 16 bits. */
426 1.9 christos HOW (R_PPC_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, dont,
427 1.1 christos ppc_elf_unhandled_reloc),
428 1.1 christos
429 1.9 christos /* Like DTPREL16_HI, but adjust for low 16 bits. */
430 1.9 christos HOW (R_PPC_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, dont,
431 1.1 christos ppc_elf_unhandled_reloc),
432 1.1 christos
433 1.1 christos /* Computes a tp-relative displacement, the difference between the value of
434 1.9 christos sym+add and the value of the thread pointer (r13). */
435 1.9 christos HOW (R_PPC_TPREL32, 2, 32, 0xffffffff, 0, FALSE, dont,
436 1.1 christos ppc_elf_unhandled_reloc),
437 1.1 christos
438 1.9 christos /* A 16 bit tprel reloc. */
439 1.9 christos HOW (R_PPC_TPREL16, 1, 16, 0xffff, 0, FALSE, signed,
440 1.1 christos ppc_elf_unhandled_reloc),
441 1.1 christos
442 1.9 christos /* Like TPREL16, but no overflow. */
443 1.9 christos HOW (R_PPC_TPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
444 1.1 christos ppc_elf_unhandled_reloc),
445 1.1 christos
446 1.9 christos /* Like TPREL16_LO, but next higher group of 16 bits. */
447 1.9 christos HOW (R_PPC_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, dont,
448 1.1 christos ppc_elf_unhandled_reloc),
449 1.1 christos
450 1.9 christos /* Like TPREL16_HI, but adjust for low 16 bits. */
451 1.9 christos HOW (R_PPC_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, dont,
452 1.1 christos ppc_elf_unhandled_reloc),
453 1.1 christos
454 1.1 christos /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
455 1.1 christos with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
456 1.9 christos to the first entry. */
457 1.9 christos HOW (R_PPC_GOT_TLSGD16, 1, 16, 0xffff, 0, FALSE, signed,
458 1.1 christos ppc_elf_unhandled_reloc),
459 1.1 christos
460 1.9 christos /* Like GOT_TLSGD16, but no overflow. */
461 1.9 christos HOW (R_PPC_GOT_TLSGD16_LO, 1, 16, 0xffff, 0, FALSE, dont,
462 1.1 christos ppc_elf_unhandled_reloc),
463 1.1 christos
464 1.9 christos /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
465 1.9 christos HOW (R_PPC_GOT_TLSGD16_HI, 1, 16, 0xffff, 16, FALSE, dont,
466 1.1 christos ppc_elf_unhandled_reloc),
467 1.1 christos
468 1.9 christos /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
469 1.9 christos HOW (R_PPC_GOT_TLSGD16_HA, 1, 16, 0xffff, 16, FALSE, dont,
470 1.1 christos ppc_elf_unhandled_reloc),
471 1.1 christos
472 1.1 christos /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
473 1.1 christos with values (sym+add)@dtpmod and zero, and computes the offset to the
474 1.9 christos first entry. */
475 1.9 christos HOW (R_PPC_GOT_TLSLD16, 1, 16, 0xffff, 0, FALSE, signed,
476 1.1 christos ppc_elf_unhandled_reloc),
477 1.1 christos
478 1.9 christos /* Like GOT_TLSLD16, but no overflow. */
479 1.9 christos HOW (R_PPC_GOT_TLSLD16_LO, 1, 16, 0xffff, 0, FALSE, dont,
480 1.1 christos ppc_elf_unhandled_reloc),
481 1.1 christos
482 1.9 christos /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
483 1.9 christos HOW (R_PPC_GOT_TLSLD16_HI, 1, 16, 0xffff, 16, FALSE, dont,
484 1.1 christos ppc_elf_unhandled_reloc),
485 1.1 christos
486 1.9 christos /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
487 1.9 christos HOW (R_PPC_GOT_TLSLD16_HA, 1, 16, 0xffff, 16, FALSE, dont,
488 1.1 christos ppc_elf_unhandled_reloc),
489 1.1 christos
490 1.1 christos /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
491 1.9 christos the offset to the entry. */
492 1.9 christos HOW (R_PPC_GOT_DTPREL16, 1, 16, 0xffff, 0, FALSE, signed,
493 1.1 christos ppc_elf_unhandled_reloc),
494 1.1 christos
495 1.9 christos /* Like GOT_DTPREL16, but no overflow. */
496 1.9 christos HOW (R_PPC_GOT_DTPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
497 1.1 christos ppc_elf_unhandled_reloc),
498 1.1 christos
499 1.9 christos /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
500 1.9 christos HOW (R_PPC_GOT_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, dont,
501 1.1 christos ppc_elf_unhandled_reloc),
502 1.1 christos
503 1.9 christos /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
504 1.9 christos HOW (R_PPC_GOT_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, dont,
505 1.1 christos ppc_elf_unhandled_reloc),
506 1.1 christos
507 1.1 christos /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
508 1.9 christos offset to the entry. */
509 1.9 christos HOW (R_PPC_GOT_TPREL16, 1, 16, 0xffff, 0, FALSE, signed,
510 1.1 christos ppc_elf_unhandled_reloc),
511 1.1 christos
512 1.9 christos /* Like GOT_TPREL16, but no overflow. */
513 1.9 christos HOW (R_PPC_GOT_TPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
514 1.1 christos ppc_elf_unhandled_reloc),
515 1.1 christos
516 1.9 christos /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
517 1.9 christos HOW (R_PPC_GOT_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, dont,
518 1.1 christos ppc_elf_unhandled_reloc),
519 1.1 christos
520 1.9 christos /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
521 1.9 christos HOW (R_PPC_GOT_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, dont,
522 1.1 christos ppc_elf_unhandled_reloc),
523 1.1 christos
524 1.1 christos /* The remaining relocs are from the Embedded ELF ABI, and are not
525 1.1 christos in the SVR4 ELF ABI. */
526 1.1 christos
527 1.9 christos /* 32 bit value resulting from the addend minus the symbol. */
528 1.9 christos HOW (R_PPC_EMB_NADDR32, 2, 32, 0xffffffff, 0, FALSE, dont,
529 1.1 christos ppc_elf_unhandled_reloc),
530 1.1 christos
531 1.9 christos /* 16 bit value resulting from the addend minus the symbol. */
532 1.9 christos HOW (R_PPC_EMB_NADDR16, 1, 16, 0xffff, 0, FALSE, signed,
533 1.1 christos ppc_elf_unhandled_reloc),
534 1.1 christos
535 1.9 christos /* 16 bit value resulting from the addend minus the symbol. */
536 1.9 christos HOW (R_PPC_EMB_NADDR16_LO, 1, 16, 0xffff, 0, FALSE, dont,
537 1.1 christos ppc_elf_unhandled_reloc),
538 1.1 christos
539 1.9 christos /* The high order 16 bits of the addend minus the symbol. */
540 1.9 christos HOW (R_PPC_EMB_NADDR16_HI, 1, 16, 0xffff, 16, FALSE, dont,
541 1.1 christos ppc_elf_unhandled_reloc),
542 1.1 christos
543 1.1 christos /* The high order 16 bits of the result of the addend minus the address,
544 1.1 christos plus 1 if the contents of the low 16 bits, treated as a signed number,
545 1.9 christos is negative. */
546 1.9 christos HOW (R_PPC_EMB_NADDR16_HA, 1, 16, 0xffff, 16, FALSE, dont,
547 1.1 christos ppc_elf_unhandled_reloc),
548 1.1 christos
549 1.1 christos /* 16 bit value resulting from allocating a 4 byte word to hold an
550 1.1 christos address in the .sdata section, and returning the offset from
551 1.9 christos _SDA_BASE_ for that relocation. */
552 1.9 christos HOW (R_PPC_EMB_SDAI16, 1, 16, 0xffff, 0, FALSE, signed,
553 1.1 christos ppc_elf_unhandled_reloc),
554 1.1 christos
555 1.1 christos /* 16 bit value resulting from allocating a 4 byte word to hold an
556 1.1 christos address in the .sdata2 section, and returning the offset from
557 1.9 christos _SDA2_BASE_ for that relocation. */
558 1.9 christos HOW (R_PPC_EMB_SDA2I16, 1, 16, 0xffff, 0, FALSE, signed,
559 1.1 christos ppc_elf_unhandled_reloc),
560 1.1 christos
561 1.1 christos /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
562 1.9 christos small data items. */
563 1.9 christos HOW (R_PPC_EMB_SDA2REL, 1, 16, 0xffff, 0, FALSE, signed,
564 1.1 christos ppc_elf_unhandled_reloc),
565 1.1 christos
566 1.1 christos /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
567 1.1 christos signed offset from the appropriate base, and filling in the register
568 1.9 christos field with the appropriate register (0, 2, or 13). */
569 1.9 christos HOW (R_PPC_EMB_SDA21, 2, 16, 0xffff, 0, FALSE, signed,
570 1.1 christos ppc_elf_unhandled_reloc),
571 1.1 christos
572 1.1 christos /* Relocation not handled: R_PPC_EMB_MRKREF */
573 1.1 christos /* Relocation not handled: R_PPC_EMB_RELSEC16 */
574 1.1 christos /* Relocation not handled: R_PPC_EMB_RELST_LO */
575 1.1 christos /* Relocation not handled: R_PPC_EMB_RELST_HI */
576 1.1 christos /* Relocation not handled: R_PPC_EMB_RELST_HA */
577 1.1 christos /* Relocation not handled: R_PPC_EMB_BIT_FLD */
578 1.1 christos
579 1.1 christos /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
580 1.1 christos in the 16 bit signed offset from the appropriate base, and filling in the
581 1.9 christos register field with the appropriate register (0, 2, or 13). */
582 1.9 christos HOW (R_PPC_EMB_RELSDA, 1, 16, 0xffff, 0, FALSE, signed,
583 1.1 christos ppc_elf_unhandled_reloc),
584 1.1 christos
585 1.9 christos /* A relative 8 bit branch. */
586 1.9 christos HOW (R_PPC_VLE_REL8, 1, 8, 0xff, 1, TRUE, signed,
587 1.3 christos bfd_elf_generic_reloc),
588 1.1 christos
589 1.9 christos /* A relative 15 bit branch. */
590 1.9 christos HOW (R_PPC_VLE_REL15, 2, 16, 0xfffe, 0, TRUE, signed,
591 1.1 christos bfd_elf_generic_reloc),
592 1.3 christos
593 1.9 christos /* A relative 24 bit branch. */
594 1.9 christos HOW (R_PPC_VLE_REL24, 2, 25, 0x1fffffe, 0, TRUE, signed,
595 1.1 christos bfd_elf_generic_reloc),
596 1.1 christos
597 1.9 christos /* The 16 LSBS in split16a format. */
598 1.9 christos HOW (R_PPC_VLE_LO16A, 2, 16, 0x1f07ff, 0, FALSE, dont,
599 1.1 christos ppc_elf_unhandled_reloc),
600 1.1 christos
601 1.9 christos /* The 16 LSBS in split16d format. */
602 1.9 christos HOW (R_PPC_VLE_LO16D, 2, 16, 0x3e007ff, 0, FALSE, dont,
603 1.1 christos ppc_elf_unhandled_reloc),
604 1.1 christos
605 1.9 christos /* Bits 16-31 split16a format. */
606 1.9 christos HOW (R_PPC_VLE_HI16A, 2, 16, 0x1f07ff, 16, FALSE, dont,
607 1.1 christos ppc_elf_unhandled_reloc),
608 1.1 christos
609 1.9 christos /* Bits 16-31 split16d format. */
610 1.9 christos HOW (R_PPC_VLE_HI16D, 2, 16, 0x3e007ff, 16, FALSE, dont,
611 1.1 christos ppc_elf_unhandled_reloc),
612 1.1 christos
613 1.9 christos /* Bits 16-31 (High Adjusted) in split16a format. */
614 1.9 christos HOW (R_PPC_VLE_HA16A, 2, 16, 0x1f07ff, 16, FALSE, dont,
615 1.1 christos ppc_elf_unhandled_reloc),
616 1.1 christos
617 1.9 christos /* Bits 16-31 (High Adjusted) in split16d format. */
618 1.9 christos HOW (R_PPC_VLE_HA16D, 2, 16, 0x3e007ff, 16, FALSE, dont,
619 1.1 christos ppc_elf_unhandled_reloc),
620 1.3 christos
621 1.3 christos /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
622 1.3 christos instructions. If the register base is 0 then the linker changes
623 1.9 christos the e_add16i to an e_li instruction. */
624 1.9 christos HOW (R_PPC_VLE_SDA21, 2, 16, 0xffff, 0, FALSE, signed,
625 1.1 christos ppc_elf_unhandled_reloc),
626 1.3 christos
627 1.9 christos /* Like R_PPC_VLE_SDA21 but ignore overflow. */
628 1.9 christos HOW (R_PPC_VLE_SDA21_LO, 2, 16, 0xffff, 0, FALSE, dont,
629 1.1 christos ppc_elf_unhandled_reloc),
630 1.1 christos
631 1.9 christos /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
632 1.9 christos HOW (R_PPC_VLE_SDAREL_LO16A, 2, 16, 0x1f07ff, 0, FALSE, dont,
633 1.1 christos ppc_elf_unhandled_reloc),
634 1.1 christos
635 1.9 christos /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
636 1.9 christos HOW (R_PPC_VLE_SDAREL_LO16D, 2, 16, 0x3e007ff, 0, FALSE, dont,
637 1.1 christos ppc_elf_unhandled_reloc),
638 1.1 christos
639 1.9 christos /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
640 1.9 christos HOW (R_PPC_VLE_SDAREL_HI16A, 2, 16, 0x1f07ff, 16, FALSE, dont,
641 1.1 christos ppc_elf_unhandled_reloc),
642 1.1 christos
643 1.9 christos /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
644 1.9 christos HOW (R_PPC_VLE_SDAREL_HI16D, 2, 16, 0x3e007ff, 16, FALSE, dont,
645 1.1 christos ppc_elf_unhandled_reloc),
646 1.1 christos
647 1.9 christos /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
648 1.9 christos HOW (R_PPC_VLE_SDAREL_HA16A, 2, 16, 0x1f07ff, 16, FALSE, dont,
649 1.1 christos ppc_elf_unhandled_reloc),
650 1.1 christos
651 1.9 christos /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
652 1.9 christos HOW (R_PPC_VLE_SDAREL_HA16D, 2, 16, 0x3e007ff, 16, FALSE, dont,
653 1.7 christos ppc_elf_unhandled_reloc),
654 1.7 christos
655 1.9 christos /* e_li split20 format. */
656 1.9 christos HOW (R_PPC_VLE_ADDR20, 2, 20, 0x1f7fff, 0, FALSE, dont,
657 1.9 christos ppc_elf_unhandled_reloc),
658 1.9 christos
659 1.9 christos HOW (R_PPC_IRELATIVE, 2, 32, 0xffffffff, 0, FALSE, dont,
660 1.1 christos ppc_elf_unhandled_reloc),
661 1.1 christos
662 1.9 christos /* A 16 bit relative relocation. */
663 1.9 christos HOW (R_PPC_REL16, 1, 16, 0xffff, 0, TRUE, signed,
664 1.1 christos bfd_elf_generic_reloc),
665 1.1 christos
666 1.9 christos /* A 16 bit relative relocation without overflow. */
667 1.9 christos HOW (R_PPC_REL16_LO, 1, 16, 0xffff, 0, TRUE, dont,
668 1.1 christos bfd_elf_generic_reloc),
669 1.1 christos
670 1.9 christos /* The high order 16 bits of a relative address. */
671 1.9 christos HOW (R_PPC_REL16_HI, 1, 16, 0xffff, 16, TRUE, dont,
672 1.1 christos bfd_elf_generic_reloc),
673 1.1 christos
674 1.1 christos /* The high order 16 bits of a relative address, plus 1 if the contents of
675 1.9 christos the low 16 bits, treated as a signed number, is negative. */
676 1.9 christos HOW (R_PPC_REL16_HA, 1, 16, 0xffff, 16, TRUE, dont,
677 1.1 christos ppc_elf_addr16_ha_reloc),
678 1.3 christos
679 1.9 christos /* Like R_PPC_REL16_HA but for split field in addpcis. */
680 1.9 christos HOW (R_PPC_REL16DX_HA, 2, 16, 0x1fffc1, 16, TRUE, signed,
681 1.3 christos ppc_elf_addr16_ha_reloc),
682 1.7 christos
683 1.9 christos /* A split-field reloc for addpcis, non-relative (gas internal use only). */
684 1.9 christos HOW (R_PPC_16DX_HA, 2, 16, 0x1fffc1, 16, FALSE, signed,
685 1.7 christos ppc_elf_addr16_ha_reloc),
686 1.1 christos
687 1.9 christos /* GNU extension to record C++ vtable hierarchy. */
688 1.9 christos HOW (R_PPC_GNU_VTINHERIT, 0, 0, 0, 0, FALSE, dont,
689 1.1 christos NULL),
690 1.1 christos
691 1.9 christos /* GNU extension to record C++ vtable member usage. */
692 1.9 christos HOW (R_PPC_GNU_VTENTRY, 0, 0, 0, 0, FALSE, dont,
693 1.1 christos NULL),
694 1.1 christos
695 1.9 christos /* Phony reloc to handle AIX style TOC entries. */
696 1.9 christos HOW (R_PPC_TOC16, 1, 16, 0xffff, 0, FALSE, signed,
697 1.1 christos ppc_elf_unhandled_reloc),
698 1.1 christos };
699 1.1 christos
700 1.1 christos /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
702 1.1 christos
703 1.1 christos static void
704 1.1 christos ppc_elf_howto_init (void)
705 1.1 christos {
706 1.1 christos unsigned int i, type;
707 1.1 christos
708 1.1 christos for (i = 0;
709 1.1 christos i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
710 1.1 christos i++)
711 1.1 christos {
712 1.1 christos type = ppc_elf_howto_raw[i].type;
713 1.1 christos if (type >= (sizeof (ppc_elf_howto_table)
714 1.1 christos / sizeof (ppc_elf_howto_table[0])))
715 1.1 christos abort ();
716 1.1 christos ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
717 1.1 christos }
718 1.1 christos }
719 1.1 christos
720 1.1 christos static reloc_howto_type *
721 1.1 christos ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
722 1.1 christos bfd_reloc_code_real_type code)
723 1.1 christos {
724 1.1 christos enum elf_ppc_reloc_type r;
725 1.1 christos
726 1.1 christos /* Initialize howto table if not already done. */
727 1.1 christos if (!ppc_elf_howto_table[R_PPC_ADDR32])
728 1.1 christos ppc_elf_howto_init ();
729 1.1 christos
730 1.1 christos switch (code)
731 1.1 christos {
732 1.1 christos default:
733 1.1 christos return NULL;
734 1.1 christos
735 1.1 christos case BFD_RELOC_NONE: r = R_PPC_NONE; break;
736 1.1 christos case BFD_RELOC_32: r = R_PPC_ADDR32; break;
737 1.1 christos case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
738 1.1 christos case BFD_RELOC_PPC64_ADDR16_DS:
739 1.1 christos case BFD_RELOC_16: r = R_PPC_ADDR16; break;
740 1.1 christos case BFD_RELOC_PPC64_ADDR16_LO_DS:
741 1.1 christos case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
742 1.1 christos case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
743 1.1 christos case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
744 1.1 christos case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
745 1.1 christos case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
746 1.1 christos case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
747 1.1 christos case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
748 1.1 christos case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
749 1.1 christos case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
750 1.1 christos case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
751 1.1 christos case BFD_RELOC_PPC64_GOT16_DS:
752 1.1 christos case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
753 1.1 christos case BFD_RELOC_PPC64_GOT16_LO_DS:
754 1.1 christos case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
755 1.1 christos case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
756 1.1 christos case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
757 1.1 christos case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
758 1.1 christos case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
759 1.1 christos case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
760 1.1 christos case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
761 1.1 christos case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
762 1.1 christos case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
763 1.1 christos case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
764 1.1 christos case BFD_RELOC_PPC64_PLT16_LO_DS:
765 1.1 christos case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
766 1.1 christos case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
767 1.1 christos case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
768 1.1 christos case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
769 1.1 christos case BFD_RELOC_PPC64_SECTOFF_DS:
770 1.1 christos case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
771 1.1 christos case BFD_RELOC_PPC64_SECTOFF_LO_DS:
772 1.1 christos case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
773 1.1 christos case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
774 1.1 christos case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
775 1.1 christos case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
776 1.1 christos case BFD_RELOC_PPC64_TOC16_DS:
777 1.1 christos case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
778 1.1 christos case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
779 1.1 christos case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
780 1.1 christos case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
781 1.1 christos case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
782 1.1 christos case BFD_RELOC_PPC64_TPREL16_DS:
783 1.1 christos case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
784 1.1 christos case BFD_RELOC_PPC64_TPREL16_LO_DS:
785 1.1 christos case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
786 1.1 christos case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
787 1.1 christos case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
788 1.1 christos case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
789 1.1 christos case BFD_RELOC_PPC64_DTPREL16_DS:
790 1.1 christos case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
791 1.1 christos case BFD_RELOC_PPC64_DTPREL16_LO_DS:
792 1.1 christos case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
793 1.1 christos case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
794 1.1 christos case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
795 1.1 christos case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
796 1.1 christos case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
797 1.1 christos case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
798 1.1 christos case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
799 1.1 christos case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
800 1.1 christos case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
801 1.1 christos case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
802 1.1 christos case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
803 1.1 christos case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
804 1.1 christos case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
805 1.1 christos case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
806 1.1 christos case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
807 1.1 christos case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
808 1.1 christos case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
809 1.1 christos case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
810 1.1 christos case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
811 1.1 christos case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
812 1.1 christos case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
813 1.1 christos case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
814 1.1 christos case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
815 1.1 christos case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
816 1.1 christos case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
817 1.1 christos case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
818 1.1 christos case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
819 1.1 christos case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
820 1.1 christos case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
821 1.1 christos case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
822 1.1 christos case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
823 1.1 christos case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
824 1.1 christos case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
825 1.1 christos case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
826 1.1 christos case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
827 1.1 christos case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
828 1.1 christos case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
829 1.1 christos case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
830 1.1 christos case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
831 1.1 christos case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
832 1.1 christos case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
833 1.1 christos case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
834 1.1 christos case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
835 1.1 christos case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
836 1.1 christos case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
837 1.1 christos case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
838 1.1 christos case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
839 1.1 christos case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
840 1.1 christos r = R_PPC_VLE_SDAREL_LO16A;
841 1.1 christos break;
842 1.1 christos case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
843 1.1 christos r = R_PPC_VLE_SDAREL_LO16D;
844 1.1 christos break;
845 1.1 christos case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
846 1.1 christos r = R_PPC_VLE_SDAREL_HI16A;
847 1.1 christos break;
848 1.1 christos case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
849 1.1 christos r = R_PPC_VLE_SDAREL_HI16D;
850 1.1 christos break;
851 1.1 christos case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
852 1.1 christos r = R_PPC_VLE_SDAREL_HA16A;
853 1.1 christos break;
854 1.1 christos case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
855 1.1 christos r = R_PPC_VLE_SDAREL_HA16D;
856 1.1 christos break;
857 1.1 christos case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
858 1.1 christos case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
859 1.7 christos case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
860 1.3 christos case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
861 1.1 christos case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
862 1.1 christos case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
863 1.1 christos case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
864 1.1 christos case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
865 1.1 christos }
866 1.1 christos
867 1.1 christos return ppc_elf_howto_table[r];
868 1.1 christos };
869 1.1 christos
870 1.1 christos static reloc_howto_type *
871 1.1 christos ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
872 1.1 christos const char *r_name)
873 1.1 christos {
874 1.1 christos unsigned int i;
875 1.1 christos
876 1.1 christos for (i = 0;
877 1.1 christos i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
878 1.1 christos i++)
879 1.1 christos if (ppc_elf_howto_raw[i].name != NULL
880 1.1 christos && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
881 1.1 christos return &ppc_elf_howto_raw[i];
882 1.1 christos
883 1.1 christos return NULL;
884 1.1 christos }
885 1.1 christos
886 1.7 christos /* Set the howto pointer for a PowerPC ELF reloc. */
887 1.7 christos
888 1.1 christos static bfd_boolean
889 1.1 christos ppc_elf_info_to_howto (bfd *abfd,
890 1.1 christos arelent *cache_ptr,
891 1.3 christos Elf_Internal_Rela *dst)
892 1.3 christos {
893 1.1 christos unsigned int r_type;
894 1.1 christos
895 1.1 christos /* Initialize howto table if not already done. */
896 1.1 christos if (!ppc_elf_howto_table[R_PPC_ADDR32])
897 1.3 christos ppc_elf_howto_init ();
898 1.3 christos
899 1.3 christos r_type = ELF32_R_TYPE (dst->r_info);
900 1.7 christos if (r_type >= R_PPC_max)
901 1.7 christos {
902 1.7 christos /* xgettext:c-format */
903 1.3 christos _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
904 1.7 christos abfd, r_type);
905 1.3 christos bfd_set_error (bfd_error_bad_value);
906 1.7 christos return FALSE;
907 1.3 christos }
908 1.1 christos
909 1.1 christos cache_ptr->howto = ppc_elf_howto_table[r_type];
910 1.1 christos
911 1.7 christos /* Just because the above assert didn't trigger doesn't mean that
912 1.1 christos ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
913 1.7 christos if (cache_ptr->howto == NULL)
914 1.7 christos {
915 1.7 christos /* xgettext:c-format */
916 1.1 christos _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
917 1.1 christos abfd, r_type);
918 1.7 christos bfd_set_error (bfd_error_bad_value);
919 1.1 christos
920 1.7 christos return FALSE;
921 1.7 christos }
922 1.1 christos
923 1.1 christos return TRUE;
924 1.1 christos }
925 1.1 christos
926 1.1 christos /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
927 1.7 christos
928 1.1 christos static bfd_reloc_status_type
929 1.1 christos ppc_elf_addr16_ha_reloc (bfd *abfd,
930 1.7 christos arelent *reloc_entry,
931 1.1 christos asymbol *symbol,
932 1.1 christos void *data,
933 1.1 christos asection *input_section,
934 1.1 christos bfd *output_bfd,
935 1.3 christos char **error_message ATTRIBUTE_UNUSED)
936 1.3 christos {
937 1.3 christos enum elf_ppc_reloc_type r_type;
938 1.3 christos long insn;
939 1.1 christos bfd_size_type octets;
940 1.1 christos bfd_vma value;
941 1.1 christos
942 1.1 christos if (output_bfd != NULL)
943 1.1 christos {
944 1.1 christos reloc_entry->address += input_section->output_offset;
945 1.1 christos return bfd_reloc_ok;
946 1.3 christos }
947 1.3 christos
948 1.3 christos reloc_entry->addend += 0x8000;
949 1.3 christos r_type = reloc_entry->howto->type;
950 1.3 christos if (r_type != R_PPC_REL16DX_HA)
951 1.3 christos return bfd_reloc_continue;
952 1.3 christos
953 1.3 christos value = 0;
954 1.3 christos if (!bfd_is_com_section (symbol->section))
955 1.3 christos value = symbol->value;
956 1.3 christos value += (reloc_entry->addend
957 1.3 christos + symbol->section->output_offset
958 1.3 christos + symbol->section->output_section->vma);
959 1.3 christos value -= (reloc_entry->address
960 1.3 christos + input_section->output_offset
961 1.3 christos + input_section->output_section->vma);
962 1.9 christos value >>= 16;
963 1.3 christos
964 1.3 christos octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section);
965 1.3 christos insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
966 1.3 christos insn &= ~0x1fffc1;
967 1.3 christos insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
968 1.1 christos bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
969 1.1 christos return bfd_reloc_ok;
970 1.1 christos }
971 1.1 christos
972 1.1 christos static bfd_reloc_status_type
973 1.1 christos ppc_elf_unhandled_reloc (bfd *abfd,
974 1.1 christos arelent *reloc_entry,
975 1.1 christos asymbol *symbol,
976 1.1 christos void *data,
977 1.1 christos asection *input_section,
978 1.1 christos bfd *output_bfd,
979 1.1 christos char **error_message)
980 1.1 christos {
981 1.1 christos /* If this is a relocatable link (output_bfd test tells us), just
982 1.1 christos call the generic function. Any adjustment will be done at final
983 1.1 christos link time. */
984 1.1 christos if (output_bfd != NULL)
985 1.1 christos return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
986 1.1 christos input_section, output_bfd, error_message);
987 1.1 christos
988 1.1 christos if (error_message != NULL)
989 1.1 christos {
990 1.1 christos static char buf[60];
991 1.1 christos sprintf (buf, _("generic linker can't handle %s"),
992 1.1 christos reloc_entry->howto->name);
993 1.1 christos *error_message = buf;
994 1.1 christos }
995 1.1 christos return bfd_reloc_dangerous;
996 1.1 christos }
997 1.1 christos
998 1.1 christos /* Sections created by the linker. */
1000 1.1 christos
1001 1.1 christos typedef struct elf_linker_section
1002 1.1 christos {
1003 1.1 christos /* Pointer to the bfd section. */
1004 1.1 christos asection *section;
1005 1.1 christos /* Section name. */
1006 1.1 christos const char *name;
1007 1.1 christos /* Associated bss section name. */
1008 1.1 christos const char *bss_name;
1009 1.1 christos /* Associated symbol name. */
1010 1.1 christos const char *sym_name;
1011 1.1 christos /* Associated symbol. */
1012 1.1 christos struct elf_link_hash_entry *sym;
1013 1.1 christos } elf_linker_section_t;
1014 1.1 christos
1015 1.1 christos /* Linked list of allocated pointer entries. This hangs off of the
1016 1.1 christos symbol lists, and provides allows us to return different pointers,
1017 1.1 christos based on different addend's. */
1018 1.1 christos
1019 1.1 christos typedef struct elf_linker_section_pointers
1020 1.1 christos {
1021 1.1 christos /* next allocated pointer for this symbol */
1022 1.1 christos struct elf_linker_section_pointers *next;
1023 1.1 christos /* offset of pointer from beginning of section */
1024 1.1 christos bfd_vma offset;
1025 1.1 christos /* addend used */
1026 1.1 christos bfd_vma addend;
1027 1.1 christos /* which linker section this is */
1028 1.1 christos elf_linker_section_t *lsect;
1029 1.1 christos } elf_linker_section_pointers_t;
1030 1.1 christos
1031 1.1 christos struct ppc_elf_obj_tdata
1032 1.1 christos {
1033 1.1 christos struct elf_obj_tdata elf;
1034 1.1 christos
1035 1.1 christos /* A mapping from local symbols to offsets into the various linker
1036 1.1 christos sections added. This is index by the symbol index. */
1037 1.1 christos elf_linker_section_pointers_t **linker_section_pointers;
1038 1.1 christos
1039 1.1 christos /* Flags used to auto-detect plt type. */
1040 1.1 christos unsigned int makes_plt_call : 1;
1041 1.1 christos unsigned int has_rel16 : 1;
1042 1.1 christos };
1043 1.1 christos
1044 1.1 christos #define ppc_elf_tdata(bfd) \
1045 1.1 christos ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1046 1.1 christos
1047 1.1 christos #define elf_local_ptr_offsets(bfd) \
1048 1.1 christos (ppc_elf_tdata (bfd)->linker_section_pointers)
1049 1.1 christos
1050 1.1 christos #define is_ppc_elf(bfd) \
1051 1.1 christos (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1052 1.1 christos && elf_object_id (bfd) == PPC32_ELF_DATA)
1053 1.1 christos
1054 1.1 christos /* Override the generic function because we store some extras. */
1055 1.1 christos
1056 1.1 christos static bfd_boolean
1057 1.1 christos ppc_elf_mkobject (bfd *abfd)
1058 1.1 christos {
1059 1.1 christos return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1060 1.6 christos PPC32_ELF_DATA);
1061 1.6 christos }
1062 1.6 christos
1063 1.6 christos /* When defaulting arch/mach, decode apuinfo to find a better match. */
1064 1.6 christos
1065 1.6 christos bfd_boolean
1066 1.6 christos _bfd_elf_ppc_set_arch (bfd *abfd)
1067 1.6 christos {
1068 1.6 christos unsigned long mach = 0;
1069 1.6 christos asection *s;
1070 1.6 christos unsigned char *contents;
1071 1.6 christos
1072 1.6 christos if (abfd->arch_info->bits_per_word == 32
1073 1.6 christos && bfd_big_endian (abfd))
1074 1.6 christos {
1075 1.6 christos
1076 1.6 christos for (s = abfd->sections; s != NULL; s = s->next)
1077 1.6 christos if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
1078 1.6 christos break;
1079 1.6 christos if (s != NULL)
1080 1.6 christos mach = bfd_mach_ppc_vle;
1081 1.6 christos }
1082 1.6 christos
1083 1.9 christos if (mach == 0)
1084 1.9 christos {
1085 1.9 christos s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1086 1.6 christos if (s != NULL
1087 1.6 christos && s->size >= 24
1088 1.6 christos && bfd_malloc_and_get_section (abfd, s, &contents))
1089 1.6 christos {
1090 1.6 christos unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
1091 1.6 christos unsigned int i;
1092 1.6 christos
1093 1.6 christos for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
1094 1.6 christos {
1095 1.6 christos unsigned int val = bfd_get_32 (abfd, contents + i);
1096 1.6 christos switch (val >> 16)
1097 1.6 christos {
1098 1.6 christos case PPC_APUINFO_PMR:
1099 1.6 christos case PPC_APUINFO_RFMCI:
1100 1.6 christos if (mach == 0)
1101 1.6 christos mach = bfd_mach_ppc_titan;
1102 1.6 christos break;
1103 1.6 christos
1104 1.6 christos case PPC_APUINFO_ISEL:
1105 1.6 christos case PPC_APUINFO_CACHELCK:
1106 1.6 christos if (mach == bfd_mach_ppc_titan)
1107 1.6 christos mach = bfd_mach_ppc_e500mc;
1108 1.6 christos break;
1109 1.6 christos
1110 1.6 christos case PPC_APUINFO_SPE:
1111 1.6 christos case PPC_APUINFO_EFS:
1112 1.7 christos case PPC_APUINFO_BRLOCK:
1113 1.6 christos if (mach != bfd_mach_ppc_vle)
1114 1.6 christos mach = bfd_mach_ppc_e500;
1115 1.6 christos break;
1116 1.6 christos
1117 1.6 christos case PPC_APUINFO_VLE:
1118 1.6 christos mach = bfd_mach_ppc_vle;
1119 1.6 christos break;
1120 1.6 christos
1121 1.6 christos default:
1122 1.6 christos mach = -1ul;
1123 1.6 christos }
1124 1.6 christos }
1125 1.6 christos free (contents);
1126 1.6 christos }
1127 1.6 christos }
1128 1.6 christos
1129 1.6 christos if (mach != 0 && mach != -1ul)
1130 1.6 christos {
1131 1.6 christos const bfd_arch_info_type *arch;
1132 1.6 christos
1133 1.6 christos for (arch = abfd->arch_info->next; arch; arch = arch->next)
1134 1.6 christos if (arch->mach == mach)
1135 1.6 christos {
1136 1.6 christos abfd->arch_info = arch;
1137 1.6 christos break;
1138 1.6 christos }
1139 1.6 christos }
1140 1.1 christos return TRUE;
1141 1.6 christos }
1142 1.1 christos
1143 1.1 christos /* Fix bad default arch selected for a 32 bit input bfd when the
1144 1.1 christos default is 64 bit. Also select arch based on apuinfo. */
1145 1.1 christos
1146 1.6 christos static bfd_boolean
1147 1.6 christos ppc_elf_object_p (bfd *abfd)
1148 1.6 christos {
1149 1.6 christos if (!abfd->arch_info->the_default)
1150 1.1 christos return TRUE;
1151 1.1 christos
1152 1.1 christos if (abfd->arch_info->bits_per_word == 64)
1153 1.1 christos {
1154 1.1 christos Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1155 1.1 christos
1156 1.1 christos if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1157 1.1 christos {
1158 1.1 christos /* Relies on arch after 64 bit default being 32 bit default. */
1159 1.1 christos abfd->arch_info = abfd->arch_info->next;
1160 1.6 christos BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1161 1.1 christos }
1162 1.1 christos }
1163 1.1 christos return _bfd_elf_ppc_set_arch (abfd);
1164 1.1 christos }
1165 1.1 christos
1166 1.1 christos /* Function to set whether a module needs the -mrelocatable bit set. */
1167 1.1 christos
1168 1.1 christos static bfd_boolean
1169 1.1 christos ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1170 1.1 christos {
1171 1.1 christos BFD_ASSERT (!elf_flags_init (abfd)
1172 1.1 christos || elf_elfheader (abfd)->e_flags == flags);
1173 1.1 christos
1174 1.1 christos elf_elfheader (abfd)->e_flags = flags;
1175 1.1 christos elf_flags_init (abfd) = TRUE;
1176 1.1 christos return TRUE;
1177 1.1 christos }
1178 1.1 christos
1179 1.1 christos /* Support for core dump NOTE sections. */
1180 1.1 christos
1181 1.1 christos static bfd_boolean
1182 1.1 christos ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1183 1.1 christos {
1184 1.1 christos int offset;
1185 1.1 christos unsigned int size;
1186 1.1 christos
1187 1.1 christos switch (note->descsz)
1188 1.1 christos {
1189 1.1 christos default:
1190 1.1 christos return FALSE;
1191 1.3 christos
1192 1.1 christos case 268: /* Linux/PPC. */
1193 1.1 christos /* pr_cursig */
1194 1.3 christos elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
1195 1.1 christos
1196 1.1 christos /* pr_pid */
1197 1.1 christos elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
1198 1.1 christos
1199 1.1 christos /* pr_reg */
1200 1.1 christos offset = 72;
1201 1.1 christos size = 192;
1202 1.1 christos
1203 1.1 christos break;
1204 1.1 christos }
1205 1.1 christos
1206 1.1 christos /* Make a ".reg/999" section. */
1207 1.1 christos return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1208 1.1 christos size, note->descpos + offset);
1209 1.1 christos }
1210 1.1 christos
1211 1.1 christos static bfd_boolean
1212 1.1 christos ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1213 1.1 christos {
1214 1.1 christos switch (note->descsz)
1215 1.1 christos {
1216 1.1 christos default:
1217 1.3 christos return FALSE;
1218 1.1 christos
1219 1.3 christos case 128: /* Linux/PPC elf_prpsinfo. */
1220 1.1 christos elf_tdata (abfd)->core->pid
1221 1.3 christos = bfd_get_32 (abfd, note->descdata + 16);
1222 1.1 christos elf_tdata (abfd)->core->program
1223 1.1 christos = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1224 1.1 christos elf_tdata (abfd)->core->command
1225 1.1 christos = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1226 1.1 christos }
1227 1.1 christos
1228 1.1 christos /* Note that for some reason, a spurious space is tacked
1229 1.1 christos onto the end of the args in some (at least one anyway)
1230 1.3 christos implementations, so strip it off if it exists. */
1231 1.1 christos
1232 1.1 christos {
1233 1.1 christos char *command = elf_tdata (abfd)->core->command;
1234 1.1 christos int n = strlen (command);
1235 1.1 christos
1236 1.1 christos if (0 < n && command[n - 1] == ' ')
1237 1.1 christos command[n - 1] = '\0';
1238 1.1 christos }
1239 1.1 christos
1240 1.1 christos return TRUE;
1241 1.1 christos }
1242 1.1 christos
1243 1.1 christos static char *
1244 1.1 christos ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1245 1.1 christos {
1246 1.1 christos switch (note_type)
1247 1.1 christos {
1248 1.1 christos default:
1249 1.1 christos return NULL;
1250 1.7 christos
1251 1.1 christos case NT_PRPSINFO:
1252 1.1 christos {
1253 1.1 christos char data[128] ATTRIBUTE_NONSTRING;
1254 1.1 christos va_list ap;
1255 1.1 christos
1256 1.9 christos va_start (ap, note_type);
1257 1.7 christos memset (data, 0, sizeof (data));
1258 1.9 christos strncpy (data + 32, va_arg (ap, const char *), 16);
1259 1.7 christos #if GCC_VERSION == 8000 || GCC_VERSION == 8001
1260 1.7 christos DIAGNOSTIC_PUSH;
1261 1.7 christos /* GCC 8.0 and 8.1 warn about 80 equals destination size with
1262 1.7 christos -Wstringop-truncation:
1263 1.7 christos https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
1264 1.1 christos */
1265 1.9 christos DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
1266 1.7 christos #endif
1267 1.7 christos strncpy (data + 48, va_arg (ap, const char *), 80);
1268 1.1 christos #if GCC_VERSION == 8000 || GCC_VERSION == 8001
1269 1.1 christos DIAGNOSTIC_POP;
1270 1.1 christos #endif
1271 1.1 christos va_end (ap);
1272 1.1 christos return elfcore_write_note (abfd, buf, bufsiz,
1273 1.1 christos "CORE", note_type, data, sizeof (data));
1274 1.1 christos }
1275 1.1 christos
1276 1.1 christos case NT_PRSTATUS:
1277 1.1 christos {
1278 1.1 christos char data[268];
1279 1.1 christos va_list ap;
1280 1.1 christos long pid;
1281 1.1 christos int cursig;
1282 1.1 christos const void *greg;
1283 1.1 christos
1284 1.1 christos va_start (ap, note_type);
1285 1.1 christos memset (data, 0, 72);
1286 1.1 christos pid = va_arg (ap, long);
1287 1.1 christos bfd_put_32 (abfd, pid, data + 24);
1288 1.1 christos cursig = va_arg (ap, int);
1289 1.1 christos bfd_put_16 (abfd, cursig, data + 12);
1290 1.1 christos greg = va_arg (ap, const void *);
1291 1.1 christos memcpy (data + 72, greg, 192);
1292 1.1 christos memset (data + 264, 0, 4);
1293 1.1 christos va_end (ap);
1294 1.1 christos return elfcore_write_note (abfd, buf, bufsiz,
1295 1.1 christos "CORE", note_type, data, sizeof (data));
1296 1.1 christos }
1297 1.1 christos }
1298 1.3 christos }
1299 1.1 christos
1300 1.1 christos static flagword
1301 1.1 christos ppc_elf_lookup_section_flags (char *flag_name)
1302 1.1 christos {
1303 1.1 christos
1304 1.1 christos if (!strcmp (flag_name, "SHF_PPC_VLE"))
1305 1.1 christos return SHF_PPC_VLE;
1306 1.1 christos
1307 1.1 christos return 0;
1308 1.1 christos }
1309 1.1 christos
1310 1.1 christos /* Return address for Ith PLT stub in section PLT, for relocation REL
1311 1.1 christos or (bfd_vma) -1 if it should not be included. */
1312 1.1 christos
1313 1.1 christos static bfd_vma
1314 1.1 christos ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1315 1.1 christos const asection *plt ATTRIBUTE_UNUSED,
1316 1.1 christos const arelent *rel)
1317 1.1 christos {
1318 1.1 christos return rel->address;
1319 1.1 christos }
1320 1.1 christos
1321 1.1 christos /* Handle a PowerPC specific section when reading an object file. This
1322 1.1 christos is called when bfd_section_from_shdr finds a section with an unknown
1323 1.1 christos type. */
1324 1.1 christos
1325 1.1 christos static bfd_boolean
1326 1.1 christos ppc_elf_section_from_shdr (bfd *abfd,
1327 1.1 christos Elf_Internal_Shdr *hdr,
1328 1.1 christos const char *name,
1329 1.1 christos int shindex)
1330 1.1 christos {
1331 1.1 christos asection *newsect;
1332 1.1 christos flagword flags;
1333 1.1 christos
1334 1.1 christos if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1335 1.9 christos return FALSE;
1336 1.1 christos
1337 1.1 christos newsect = hdr->bfd_section;
1338 1.1 christos flags = bfd_section_flags (newsect);
1339 1.1 christos if (hdr->sh_flags & SHF_EXCLUDE)
1340 1.1 christos flags |= SEC_EXCLUDE;
1341 1.1 christos
1342 1.9 christos if (hdr->sh_type == SHT_ORDERED)
1343 1.1 christos flags |= SEC_SORT_ENTRIES;
1344 1.1 christos
1345 1.1 christos bfd_set_section_flags (newsect, flags);
1346 1.1 christos return TRUE;
1347 1.1 christos }
1348 1.1 christos
1349 1.1 christos /* Set up any other section flags and such that may be necessary. */
1350 1.1 christos
1351 1.1 christos static bfd_boolean
1352 1.1 christos ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1353 1.1 christos Elf_Internal_Shdr *shdr,
1354 1.1 christos asection *asect)
1355 1.1 christos {
1356 1.1 christos if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1357 1.1 christos shdr->sh_type = SHT_ORDERED;
1358 1.1 christos
1359 1.1 christos return TRUE;
1360 1.1 christos }
1361 1.1 christos
1362 1.1 christos /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1363 1.1 christos need to bump up the number of section headers. */
1364 1.1 christos
1365 1.1 christos static int
1366 1.1 christos ppc_elf_additional_program_headers (bfd *abfd,
1367 1.1 christos struct bfd_link_info *info ATTRIBUTE_UNUSED)
1368 1.1 christos {
1369 1.1 christos asection *s;
1370 1.1 christos int ret = 0;
1371 1.1 christos
1372 1.1 christos s = bfd_get_section_by_name (abfd, ".sbss2");
1373 1.1 christos if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1374 1.1 christos ++ret;
1375 1.1 christos
1376 1.1 christos s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1377 1.1 christos if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1378 1.1 christos ++ret;
1379 1.1 christos
1380 1.3 christos return ret;
1381 1.1 christos }
1382 1.1 christos
1383 1.1 christos /* Modify the segment map for VLE executables. */
1384 1.1 christos
1385 1.1 christos bfd_boolean
1386 1.7 christos ppc_elf_modify_segment_map (bfd *abfd,
1387 1.1 christos struct bfd_link_info *info ATTRIBUTE_UNUSED)
1388 1.1 christos {
1389 1.1 christos struct elf_segment_map *m;
1390 1.1 christos
1391 1.1 christos /* At this point in the link, output sections have already been sorted by
1392 1.1 christos LMA and assigned to segments. All that is left to do is to ensure
1393 1.1 christos there is no mixing of VLE & non-VLE sections in a text segment.
1394 1.3 christos If we find that case, we split the segment.
1395 1.1 christos We maintain the original output section order. */
1396 1.7 christos
1397 1.7 christos for (m = elf_seg_map (abfd); m != NULL; m = m->next)
1398 1.7 christos {
1399 1.7 christos struct elf_segment_map *n;
1400 1.7 christos bfd_size_type amt;
1401 1.7 christos unsigned int j, k;
1402 1.1 christos unsigned int p_flags;
1403 1.1 christos
1404 1.7 christos if (m->p_type != PT_LOAD || m->count == 0)
1405 1.1 christos continue;
1406 1.7 christos
1407 1.7 christos for (p_flags = PF_R, j = 0; j != m->count; ++j)
1408 1.7 christos {
1409 1.7 christos if ((m->sections[j]->flags & SEC_READONLY) == 0)
1410 1.7 christos p_flags |= PF_W;
1411 1.7 christos if ((m->sections[j]->flags & SEC_CODE) != 0)
1412 1.7 christos {
1413 1.7 christos p_flags |= PF_X;
1414 1.7 christos if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
1415 1.7 christos p_flags |= PF_PPC_VLE;
1416 1.7 christos break;
1417 1.7 christos }
1418 1.7 christos }
1419 1.7 christos if (j != m->count)
1420 1.1 christos while (++j != m->count)
1421 1.7 christos {
1422 1.7 christos unsigned int p_flags1 = PF_R;
1423 1.7 christos
1424 1.7 christos if ((m->sections[j]->flags & SEC_READONLY) == 0)
1425 1.7 christos p_flags1 |= PF_W;
1426 1.7 christos if ((m->sections[j]->flags & SEC_CODE) != 0)
1427 1.7 christos {
1428 1.7 christos p_flags1 |= PF_X;
1429 1.7 christos if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
1430 1.7 christos p_flags1 |= PF_PPC_VLE;
1431 1.7 christos if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
1432 1.7 christos break;
1433 1.7 christos }
1434 1.7 christos p_flags |= p_flags1;
1435 1.7 christos }
1436 1.7 christos /* If we're splitting a segment which originally contained rw
1437 1.7 christos sections then those sections might now only be in one of the
1438 1.7 christos two parts. So always set p_flags if splitting, even if we
1439 1.7 christos are being called for objcopy with p_flags_valid set. */
1440 1.7 christos if (j != m->count || !m->p_flags_valid)
1441 1.7 christos {
1442 1.7 christos m->p_flags_valid = 1;
1443 1.1 christos m->p_flags = p_flags;
1444 1.1 christos }
1445 1.7 christos if (j == m->count)
1446 1.1 christos continue;
1447 1.1 christos
1448 1.1 christos /* Sections 0..j-1 stay in this (current) segment,
1449 1.1 christos the remainder are put in a new segment.
1450 1.1 christos The scan resumes with the new segment. */
1451 1.1 christos
1452 1.1 christos amt = sizeof (struct elf_segment_map);
1453 1.7 christos amt += (m->count - j - 1) * sizeof (asection *);
1454 1.1 christos n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
1455 1.1 christos if (n == NULL)
1456 1.1 christos return FALSE;
1457 1.1 christos
1458 1.7 christos n->p_type = PT_LOAD;
1459 1.7 christos n->count = m->count - j;
1460 1.7 christos for (k = 0; k < n->count; ++k)
1461 1.1 christos n->sections[k] = m->sections[j + k];
1462 1.1 christos m->count = j;
1463 1.1 christos m->p_size_valid = 0;
1464 1.1 christos n->next = m->next;
1465 1.1 christos m->next = n;
1466 1.1 christos }
1467 1.1 christos
1468 1.1 christos return TRUE;
1469 1.1 christos }
1470 1.1 christos
1471 1.1 christos /* Add extra PPC sections -- Note, for now, make .sbss2 and
1472 1.1 christos .PPC.EMB.sbss0 a normal section, and not a bss section so
1473 1.1 christos that the linker doesn't crater when trying to make more than
1474 1.1 christos 2 sections. */
1475 1.6 christos
1476 1.6 christos static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1477 1.6 christos {
1478 1.6 christos { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1479 1.6 christos { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1480 1.6 christos { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1481 1.6 christos { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1482 1.6 christos { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1483 1.6 christos { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1484 1.6 christos { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
1485 1.1 christos { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1486 1.1 christos { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1487 1.1 christos { NULL, 0, 0, 0, 0 }
1488 1.1 christos };
1489 1.7 christos
1490 1.1 christos /* This is what we want for new plt/got. */
1491 1.1 christos static struct bfd_elf_special_section ppc_alt_plt =
1492 1.7 christos { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1493 1.1 christos
1494 1.1 christos static const struct bfd_elf_special_section *
1495 1.1 christos ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
1496 1.1 christos {
1497 1.1 christos const struct bfd_elf_special_section *ssect;
1498 1.1 christos
1499 1.1 christos /* See if this is one of the special sections. */
1500 1.1 christos if (sec->name == NULL)
1501 1.1 christos return NULL;
1502 1.1 christos
1503 1.1 christos ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1504 1.1 christos sec->use_rela_p);
1505 1.1 christos if (ssect != NULL)
1506 1.1 christos {
1507 1.1 christos if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1508 1.1 christos ssect = &ppc_alt_plt;
1509 1.1 christos return ssect;
1510 1.1 christos }
1511 1.1 christos
1512 1.1 christos return _bfd_elf_get_sec_type_attr (abfd, sec);
1513 1.1 christos }
1514 1.1 christos
1515 1.1 christos /* Very simple linked list structure for recording apuinfo values. */
1517 1.1 christos typedef struct apuinfo_list
1518 1.1 christos {
1519 1.1 christos struct apuinfo_list *next;
1520 1.1 christos unsigned long value;
1521 1.1 christos }
1522 1.1 christos apuinfo_list;
1523 1.1 christos
1524 1.1 christos static apuinfo_list *head;
1525 1.1 christos static bfd_boolean apuinfo_set;
1526 1.1 christos
1527 1.1 christos static void
1528 1.1 christos apuinfo_list_init (void)
1529 1.1 christos {
1530 1.1 christos head = NULL;
1531 1.1 christos apuinfo_set = FALSE;
1532 1.1 christos }
1533 1.1 christos
1534 1.1 christos static void
1535 1.1 christos apuinfo_list_add (unsigned long value)
1536 1.1 christos {
1537 1.1 christos apuinfo_list *entry = head;
1538 1.1 christos
1539 1.1 christos while (entry != NULL)
1540 1.1 christos {
1541 1.1 christos if (entry->value == value)
1542 1.1 christos return;
1543 1.1 christos entry = entry->next;
1544 1.1 christos }
1545 1.1 christos
1546 1.1 christos entry = bfd_malloc (sizeof (* entry));
1547 1.1 christos if (entry == NULL)
1548 1.1 christos return;
1549 1.1 christos
1550 1.1 christos entry->value = value;
1551 1.1 christos entry->next = head;
1552 1.1 christos head = entry;
1553 1.1 christos }
1554 1.1 christos
1555 1.1 christos static unsigned
1556 1.1 christos apuinfo_list_length (void)
1557 1.1 christos {
1558 1.1 christos apuinfo_list *entry;
1559 1.1 christos unsigned long count;
1560 1.1 christos
1561 1.1 christos for (entry = head, count = 0;
1562 1.1 christos entry;
1563 1.1 christos entry = entry->next)
1564 1.1 christos ++ count;
1565 1.1 christos
1566 1.1 christos return count;
1567 1.1 christos }
1568 1.1 christos
1569 1.1 christos static inline unsigned long
1570 1.1 christos apuinfo_list_element (unsigned long number)
1571 1.1 christos {
1572 1.1 christos apuinfo_list * entry;
1573 1.1 christos
1574 1.1 christos for (entry = head;
1575 1.1 christos entry && number --;
1576 1.1 christos entry = entry->next)
1577 1.1 christos ;
1578 1.1 christos
1579 1.1 christos return entry ? entry->value : 0;
1580 1.1 christos }
1581 1.1 christos
1582 1.1 christos static void
1583 1.1 christos apuinfo_list_finish (void)
1584 1.1 christos {
1585 1.1 christos apuinfo_list *entry;
1586 1.1 christos
1587 1.1 christos for (entry = head; entry;)
1588 1.1 christos {
1589 1.1 christos apuinfo_list *next = entry->next;
1590 1.1 christos free (entry);
1591 1.1 christos entry = next;
1592 1.1 christos }
1593 1.1 christos
1594 1.1 christos head = NULL;
1595 1.1 christos }
1596 1.1 christos
1597 1.1 christos /* Scan the input BFDs and create a linked list of
1598 1.1 christos the APUinfo values that will need to be emitted. */
1599 1.1 christos
1600 1.1 christos static void
1601 1.1 christos ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
1602 1.1 christos {
1603 1.1 christos bfd *ibfd;
1604 1.1 christos asection *asec;
1605 1.1 christos char *buffer = NULL;
1606 1.1 christos bfd_size_type largest_input_size = 0;
1607 1.1 christos unsigned i;
1608 1.1 christos unsigned long length;
1609 1.1 christos const char *error_message = NULL;
1610 1.1 christos
1611 1.1 christos if (link_info == NULL)
1612 1.1 christos return;
1613 1.3 christos
1614 1.1 christos apuinfo_list_init ();
1615 1.1 christos
1616 1.1 christos /* Read in the input sections contents. */
1617 1.1 christos for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
1618 1.1 christos {
1619 1.1 christos unsigned long datum;
1620 1.1 christos
1621 1.7 christos asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1622 1.7 christos if (asec == NULL)
1623 1.1 christos continue;
1624 1.1 christos
1625 1.1 christos /* xgettext:c-format */
1626 1.1 christos error_message = _("corrupt %s section in %pB");
1627 1.1 christos length = asec->size;
1628 1.1 christos if (length < 20)
1629 1.1 christos goto fail;
1630 1.1 christos
1631 1.1 christos apuinfo_set = TRUE;
1632 1.1 christos if (largest_input_size < asec->size)
1633 1.1 christos {
1634 1.1 christos if (buffer)
1635 1.1 christos free (buffer);
1636 1.1 christos largest_input_size = asec->size;
1637 1.1 christos buffer = bfd_malloc (largest_input_size);
1638 1.1 christos if (!buffer)
1639 1.1 christos return;
1640 1.1 christos }
1641 1.7 christos
1642 1.7 christos if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
1643 1.1 christos || (bfd_bread (buffer, length, ibfd) != length))
1644 1.1 christos {
1645 1.1 christos /* xgettext:c-format */
1646 1.1 christos error_message = _("unable to read in %s section from %pB");
1647 1.1 christos goto fail;
1648 1.1 christos }
1649 1.1 christos
1650 1.1 christos /* Verify the contents of the header. Note - we have to
1651 1.1 christos extract the values this way in order to allow for a
1652 1.1 christos host whose endian-ness is different from the target. */
1653 1.1 christos datum = bfd_get_32 (ibfd, buffer);
1654 1.1 christos if (datum != sizeof APUINFO_LABEL)
1655 1.1 christos goto fail;
1656 1.1 christos
1657 1.1 christos datum = bfd_get_32 (ibfd, buffer + 8);
1658 1.1 christos if (datum != 0x2)
1659 1.1 christos goto fail;
1660 1.1 christos
1661 1.1 christos if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
1662 1.1 christos goto fail;
1663 1.1 christos
1664 1.1 christos /* Get the number of bytes used for apuinfo entries. */
1665 1.1 christos datum = bfd_get_32 (ibfd, buffer + 4);
1666 1.1 christos if (datum + 20 != length)
1667 1.1 christos goto fail;
1668 1.1 christos
1669 1.1 christos /* Scan the apuinfo section, building a list of apuinfo numbers. */
1670 1.1 christos for (i = 0; i < datum; i += 4)
1671 1.1 christos apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
1672 1.1 christos }
1673 1.1 christos
1674 1.1 christos error_message = NULL;
1675 1.1 christos
1676 1.1 christos if (apuinfo_set)
1677 1.1 christos {
1678 1.1 christos /* Compute the size of the output section. */
1679 1.1 christos unsigned num_entries = apuinfo_list_length ();
1680 1.9 christos
1681 1.1 christos /* Set the output section size, if it exists. */
1682 1.1 christos asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1683 1.7 christos
1684 1.7 christos if (asec && !bfd_set_section_size (asec, 20 + num_entries * 4))
1685 1.1 christos {
1686 1.1 christos ibfd = abfd;
1687 1.1 christos /* xgettext:c-format */
1688 1.1 christos error_message = _("warning: unable to set size of %s section in %pB");
1689 1.1 christos }
1690 1.1 christos }
1691 1.1 christos
1692 1.1 christos fail:
1693 1.7 christos if (buffer)
1694 1.1 christos free (buffer);
1695 1.1 christos
1696 1.1 christos if (error_message)
1697 1.1 christos _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
1698 1.1 christos }
1699 1.1 christos
1700 1.1 christos /* Prevent the output section from accumulating the input sections'
1701 1.1 christos contents. We have already stored this in our linked list structure. */
1702 1.1 christos
1703 1.1 christos static bfd_boolean
1704 1.1 christos ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
1705 1.1 christos struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
1706 1.1 christos asection *asec,
1707 1.1 christos bfd_byte *contents ATTRIBUTE_UNUSED)
1708 1.1 christos {
1709 1.1 christos return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
1710 1.1 christos }
1711 1.9 christos
1712 1.1 christos /* Finally we can generate the output section. */
1713 1.1 christos
1714 1.1 christos static void
1715 1.1 christos ppc_final_write_processing (bfd *abfd)
1716 1.1 christos {
1717 1.1 christos bfd_byte *buffer;
1718 1.1 christos asection *asec;
1719 1.1 christos unsigned i;
1720 1.1 christos unsigned num_entries;
1721 1.1 christos bfd_size_type length;
1722 1.1 christos
1723 1.1 christos asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1724 1.1 christos if (asec == NULL)
1725 1.1 christos return;
1726 1.1 christos
1727 1.1 christos if (!apuinfo_set)
1728 1.1 christos return;
1729 1.1 christos
1730 1.1 christos length = asec->size;
1731 1.1 christos if (length < 20)
1732 1.1 christos return;
1733 1.7 christos
1734 1.7 christos buffer = bfd_malloc (length);
1735 1.1 christos if (buffer == NULL)
1736 1.1 christos {
1737 1.1 christos _bfd_error_handler
1738 1.1 christos (_("failed to allocate space for new APUinfo section"));
1739 1.1 christos return;
1740 1.1 christos }
1741 1.1 christos
1742 1.1 christos /* Create the apuinfo header. */
1743 1.1 christos num_entries = apuinfo_list_length ();
1744 1.1 christos bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
1745 1.1 christos bfd_put_32 (abfd, num_entries * 4, buffer + 4);
1746 1.1 christos bfd_put_32 (abfd, 0x2, buffer + 8);
1747 1.1 christos strcpy ((char *) buffer + 12, APUINFO_LABEL);
1748 1.1 christos
1749 1.1 christos length = 20;
1750 1.1 christos for (i = 0; i < num_entries; i++)
1751 1.1 christos {
1752 1.1 christos bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
1753 1.7 christos length += 4;
1754 1.1 christos }
1755 1.1 christos
1756 1.7 christos if (length != asec->size)
1757 1.1 christos _bfd_error_handler (_("failed to compute new APUinfo section"));
1758 1.1 christos
1759 1.1 christos if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
1760 1.1 christos _bfd_error_handler (_("failed to install new APUinfo section"));
1761 1.1 christos
1762 1.9 christos free (buffer);
1763 1.9 christos
1764 1.9 christos apuinfo_list_finish ();
1765 1.9 christos }
1766 1.9 christos
1767 1.9 christos static bfd_boolean
1768 1.9 christos ppc_elf_final_write_processing (bfd *abfd)
1769 1.1 christos {
1770 1.1 christos ppc_final_write_processing (abfd);
1771 1.1 christos return _bfd_elf_final_write_processing (abfd);
1772 1.1 christos }
1773 1.7 christos
1774 1.1 christos static bfd_boolean
1776 1.1 christos is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
1777 1.1 christos {
1778 1.1 christos bfd_byte buf[4 * 4];
1779 1.1 christos
1780 1.1 christos if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf))
1781 1.1 christos return FALSE;
1782 1.1 christos
1783 1.1 christos return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
1784 1.1 christos && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
1785 1.1 christos && bfd_get_32 (abfd, buf + 8) == MTCTR_11
1786 1.1 christos && bfd_get_32 (abfd, buf + 12) == BCTR);
1787 1.1 christos }
1788 1.1 christos
1789 1.1 christos static bfd_boolean
1790 1.1 christos section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
1791 1.1 christos {
1792 1.1 christos bfd_vma vma = *(bfd_vma *) ptr;
1793 1.1 christos return ((section->flags & SEC_ALLOC) != 0
1794 1.1 christos && section->vma <= vma
1795 1.1 christos && vma < section->vma + section->size);
1796 1.1 christos }
1797 1.1 christos
1798 1.1 christos static long
1799 1.1 christos ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
1800 1.1 christos long dynsymcount, asymbol **dynsyms,
1801 1.1 christos asymbol **ret)
1802 1.7 christos {
1803 1.1 christos bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
1804 1.1 christos asection *plt, *relplt, *dynamic, *glink;
1805 1.9 christos bfd_vma glink_vma = 0;
1806 1.1 christos bfd_vma resolv_vma = 0;
1807 1.1 christos bfd_vma stub_off;
1808 1.1 christos asymbol *s;
1809 1.1 christos arelent *p;
1810 1.1 christos size_t count, i, stub_delta;
1811 1.1 christos size_t size;
1812 1.1 christos char *names;
1813 1.1 christos bfd_byte buf[4];
1814 1.1 christos
1815 1.1 christos *ret = NULL;
1816 1.1 christos
1817 1.1 christos if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
1818 1.1 christos return 0;
1819 1.1 christos
1820 1.1 christos if (dynsymcount <= 0)
1821 1.1 christos return 0;
1822 1.1 christos
1823 1.1 christos relplt = bfd_get_section_by_name (abfd, ".rela.plt");
1824 1.1 christos if (relplt == NULL)
1825 1.1 christos return 0;
1826 1.1 christos
1827 1.1 christos plt = bfd_get_section_by_name (abfd, ".plt");
1828 1.1 christos if (plt == NULL)
1829 1.1 christos return 0;
1830 1.1 christos
1831 1.1 christos /* Call common code to handle old-style executable PLTs. */
1832 1.1 christos if (elf_section_flags (plt) & SHF_EXECINSTR)
1833 1.1 christos return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
1834 1.1 christos dynsymcount, dynsyms, ret);
1835 1.1 christos
1836 1.1 christos /* If this object was prelinked, the prelinker stored the address
1837 1.1 christos of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
1838 1.1 christos dynamic = bfd_get_section_by_name (abfd, ".dynamic");
1839 1.1 christos if (dynamic != NULL)
1840 1.1 christos {
1841 1.1 christos bfd_byte *dynbuf, *extdyn, *extdynend;
1842 1.1 christos size_t extdynsize;
1843 1.1 christos void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1844 1.1 christos
1845 1.1 christos if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
1846 1.1 christos return -1;
1847 1.1 christos
1848 1.1 christos extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1849 1.1 christos swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1850 1.1 christos
1851 1.1 christos extdyn = dynbuf;
1852 1.1 christos extdynend = extdyn + dynamic->size;
1853 1.1 christos for (; extdyn < extdynend; extdyn += extdynsize)
1854 1.1 christos {
1855 1.1 christos Elf_Internal_Dyn dyn;
1856 1.1 christos (*swap_dyn_in) (abfd, extdyn, &dyn);
1857 1.1 christos
1858 1.1 christos if (dyn.d_tag == DT_NULL)
1859 1.1 christos break;
1860 1.1 christos
1861 1.1 christos if (dyn.d_tag == DT_PPC_GOT)
1862 1.1 christos {
1863 1.1 christos unsigned int g_o_t = dyn.d_un.d_val;
1864 1.1 christos asection *got = bfd_get_section_by_name (abfd, ".got");
1865 1.1 christos if (got != NULL
1866 1.1 christos && bfd_get_section_contents (abfd, got, buf,
1867 1.1 christos g_o_t - got->vma + 4, 4))
1868 1.1 christos glink_vma = bfd_get_32 (abfd, buf);
1869 1.1 christos break;
1870 1.1 christos }
1871 1.1 christos }
1872 1.1 christos free (dynbuf);
1873 1.1 christos }
1874 1.1 christos
1875 1.1 christos /* Otherwise we read the first plt entry. */
1876 1.1 christos if (glink_vma == 0)
1877 1.1 christos {
1878 1.1 christos if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
1879 1.1 christos glink_vma = bfd_get_32 (abfd, buf);
1880 1.1 christos }
1881 1.1 christos
1882 1.1 christos if (glink_vma == 0)
1883 1.1 christos return 0;
1884 1.1 christos
1885 1.1 christos /* The .glink section usually does not survive the final
1886 1.1 christos link; search for the section (usually .text) where the
1887 1.1 christos glink stubs now reside. */
1888 1.1 christos glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
1889 1.1 christos if (glink == NULL)
1890 1.1 christos return 0;
1891 1.1 christos
1892 1.1 christos /* Determine glink PLT resolver by reading the relative branch
1893 1.1 christos from the first glink stub. */
1894 1.1 christos if (bfd_get_section_contents (abfd, glink, buf,
1895 1.1 christos glink_vma - glink->vma, 4))
1896 1.1 christos {
1897 1.1 christos unsigned int insn = bfd_get_32 (abfd, buf);
1898 1.1 christos
1899 1.1 christos /* The first glink stub may either branch to the resolver ... */
1900 1.1 christos insn ^= B;
1901 1.1 christos if ((insn & ~0x3fffffc) == 0)
1902 1.1 christos resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
1903 1.1 christos
1904 1.1 christos /* ... or fall through a bunch of NOPs. */
1905 1.1 christos else if ((insn ^ B ^ NOP) == 0)
1906 1.1 christos for (i = 4;
1907 1.1 christos bfd_get_section_contents (abfd, glink, buf,
1908 1.1 christos glink_vma - glink->vma + i, 4);
1909 1.1 christos i += 4)
1910 1.1 christos if (bfd_get_32 (abfd, buf) != NOP)
1911 1.1 christos {
1912 1.1 christos resolv_vma = glink_vma + i;
1913 1.1 christos break;
1914 1.1 christos }
1915 1.1 christos }
1916 1.7 christos
1917 1.7 christos count = relplt->size / sizeof (Elf32_External_Rela);
1918 1.7 christos /* If the stubs are those for -shared/-pie then we might have
1919 1.7 christos multiple stubs for each plt entry. If that is the case then
1920 1.7 christos there is no way to associate stubs with their plt entries short
1921 1.7 christos of figuring out the GOT pointer value used in the stub.
1922 1.7 christos The offsets tested here need to cover all possible values of
1923 1.7 christos GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */
1924 1.1 christos stub_off = glink_vma - glink->vma;
1925 1.1 christos for (stub_delta = 16; stub_delta <= 32; stub_delta += 8)
1926 1.1 christos if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta))
1927 1.1 christos break;
1928 1.1 christos if (stub_delta > 32)
1929 1.1 christos return 0;
1930 1.1 christos
1931 1.1 christos slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
1932 1.1 christos if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
1933 1.1 christos return -1;
1934 1.1 christos
1935 1.1 christos size = count * sizeof (asymbol);
1936 1.1 christos p = relplt->relocation;
1937 1.1 christos for (i = 0; i < count; i++, p++)
1938 1.1 christos {
1939 1.1 christos size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
1940 1.1 christos if (p->addend != 0)
1941 1.1 christos size += sizeof ("+0x") - 1 + 8;
1942 1.1 christos }
1943 1.1 christos
1944 1.1 christos size += sizeof (asymbol) + sizeof ("__glink");
1945 1.1 christos
1946 1.1 christos if (resolv_vma)
1947 1.1 christos size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
1948 1.7 christos
1949 1.1 christos s = *ret = bfd_malloc (size);
1950 1.3 christos if (s == NULL)
1951 1.3 christos return -1;
1952 1.1 christos
1953 1.1 christos stub_off = glink_vma - glink->vma;
1954 1.1 christos names = (char *) (s + count + 1 + (resolv_vma != 0));
1955 1.7 christos p = relplt->relocation + count - 1;
1956 1.7 christos for (i = 0; i < count; i++)
1957 1.7 christos {
1958 1.1 christos size_t len;
1959 1.1 christos
1960 1.1 christos stub_off -= stub_delta;
1961 1.1 christos if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
1962 1.1 christos stub_off -= 32;
1963 1.1 christos *s = **p->sym_ptr_ptr;
1964 1.1 christos /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
1965 1.7 christos we are defining a symbol, ensure one of them is set. */
1966 1.1 christos if ((s->flags & BSF_LOCAL) == 0)
1967 1.1 christos s->flags |= BSF_GLOBAL;
1968 1.1 christos s->flags |= BSF_SYNTHETIC;
1969 1.1 christos s->section = glink;
1970 1.1 christos s->value = stub_off;
1971 1.1 christos s->name = names;
1972 1.1 christos s->udata.p = NULL;
1973 1.1 christos len = strlen ((*p->sym_ptr_ptr)->name);
1974 1.1 christos memcpy (names, (*p->sym_ptr_ptr)->name, len);
1975 1.1 christos names += len;
1976 1.1 christos if (p->addend != 0)
1977 1.1 christos {
1978 1.1 christos memcpy (names, "+0x", sizeof ("+0x") - 1);
1979 1.1 christos names += sizeof ("+0x") - 1;
1980 1.1 christos bfd_sprintf_vma (abfd, names, p->addend);
1981 1.3 christos names += strlen (names);
1982 1.1 christos }
1983 1.1 christos memcpy (names, "@plt", sizeof ("@plt"));
1984 1.1 christos names += sizeof ("@plt");
1985 1.1 christos ++s;
1986 1.1 christos --p;
1987 1.1 christos }
1988 1.1 christos
1989 1.1 christos /* Add a symbol at the start of the glink branch table. */
1990 1.1 christos memset (s, 0, sizeof *s);
1991 1.1 christos s->the_bfd = abfd;
1992 1.1 christos s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
1993 1.1 christos s->section = glink;
1994 1.1 christos s->value = glink_vma - glink->vma;
1995 1.1 christos s->name = names;
1996 1.1 christos memcpy (names, "__glink", sizeof ("__glink"));
1997 1.1 christos names += sizeof ("__glink");
1998 1.1 christos s++;
1999 1.1 christos count++;
2000 1.1 christos
2001 1.1 christos if (resolv_vma)
2002 1.1 christos {
2003 1.1 christos /* Add a symbol for the glink PLT resolver. */
2004 1.1 christos memset (s, 0, sizeof *s);
2005 1.1 christos s->the_bfd = abfd;
2006 1.1 christos s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2007 1.1 christos s->section = glink;
2008 1.1 christos s->value = resolv_vma - glink->vma;
2009 1.1 christos s->name = names;
2010 1.1 christos memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2011 1.1 christos names += sizeof ("__glink_PLTresolve");
2012 1.1 christos s++;
2013 1.1 christos count++;
2014 1.1 christos }
2015 1.1 christos
2016 1.1 christos return count;
2017 1.1 christos }
2018 1.1 christos
2019 1.1 christos /* The following functions are specific to the ELF linker, while
2021 1.1 christos functions above are used generally. They appear in this file more
2022 1.1 christos or less in the order in which they are called. eg.
2023 1.1 christos ppc_elf_check_relocs is called early in the link process,
2024 1.1 christos ppc_elf_finish_dynamic_sections is one of the last functions
2025 1.1 christos called. */
2026 1.1 christos
2027 1.1 christos /* Track PLT entries needed for a given symbol. We might need more
2028 1.1 christos than one glink entry per symbol when generating a pic binary. */
2029 1.1 christos struct plt_entry
2030 1.1 christos {
2031 1.1 christos struct plt_entry *next;
2032 1.1 christos
2033 1.1 christos /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2034 1.1 christos This field stores the offset into .got2 used to initialise the
2035 1.1 christos GOT pointer reg. It will always be at least 32768. (Current
2036 1.1 christos gcc always uses an offset of 32768, but ld -r will pack .got2
2037 1.1 christos sections together resulting in larger offsets). */
2038 1.1 christos bfd_vma addend;
2039 1.1 christos
2040 1.1 christos /* The .got2 section. */
2041 1.1 christos asection *sec;
2042 1.1 christos
2043 1.1 christos /* PLT refcount or offset. */
2044 1.1 christos union
2045 1.1 christos {
2046 1.1 christos bfd_signed_vma refcount;
2047 1.1 christos bfd_vma offset;
2048 1.7 christos } plt;
2049 1.7 christos
2050 1.7 christos /* .glink stub offset. */
2051 1.1 christos bfd_vma glink_offset;
2052 1.1 christos };
2053 1.1 christos
2054 1.1 christos /* Of those relocs that might be copied as dynamic relocs, this
2055 1.1 christos function selects those that must be copied when linking a shared
2056 1.1 christos library or PIE, even when the symbol is local. */
2057 1.1 christos
2058 1.1 christos static int
2059 1.7 christos must_be_dyn_reloc (struct bfd_link_info *info,
2060 1.7 christos enum elf_ppc_reloc_type r_type)
2061 1.7 christos {
2062 1.7 christos switch (r_type)
2063 1.1 christos {
2064 1.1 christos default:
2065 1.1 christos /* Only relative relocs can be resolved when the object load
2066 1.1 christos address isn't fixed. DTPREL32 is excluded because the
2067 1.1 christos dynamic linker needs to differentiate global dynamic from
2068 1.1 christos local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
2069 1.1 christos return 1;
2070 1.1 christos
2071 1.1 christos case R_PPC_REL24:
2072 1.1 christos case R_PPC_REL14:
2073 1.1 christos case R_PPC_REL14_BRTAKEN:
2074 1.1 christos case R_PPC_REL14_BRNTAKEN:
2075 1.1 christos case R_PPC_REL32:
2076 1.1 christos return 0;
2077 1.7 christos
2078 1.7 christos case R_PPC_TPREL32:
2079 1.7 christos case R_PPC_TPREL16:
2080 1.1 christos case R_PPC_TPREL16_LO:
2081 1.1 christos case R_PPC_TPREL16_HI:
2082 1.1 christos case R_PPC_TPREL16_HA:
2083 1.1 christos /* These relocations are relative but in a shared library the
2084 1.1 christos linker doesn't know the thread pointer base. */
2085 1.1 christos return bfd_link_dll (info);
2086 1.1 christos }
2087 1.1 christos }
2088 1.1 christos
2089 1.3 christos /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2090 1.3 christos copying dynamic variables from a shared lib into an app's dynbss
2091 1.3 christos section, and instead use a dynamic relocation to point into the
2092 1.3 christos shared lib. */
2093 1.3 christos #define ELIMINATE_COPY_RELOCS 1
2094 1.3 christos
2095 1.3 christos /* Used to track dynamic relocations for local symbols. */
2096 1.3 christos struct ppc_dyn_relocs
2097 1.3 christos {
2098 1.3 christos struct ppc_dyn_relocs *next;
2099 1.3 christos
2100 1.3 christos /* The input section of the reloc. */
2101 1.3 christos asection *sec;
2102 1.3 christos
2103 1.3 christos /* Total number of relocs copied for the input section. */
2104 1.1 christos unsigned int count : 31;
2105 1.1 christos
2106 1.1 christos /* Whether this entry is for STT_GNU_IFUNC symbols. */
2107 1.1 christos unsigned int ifunc : 1;
2108 1.1 christos };
2109 1.1 christos
2110 1.1 christos /* PPC ELF linker hash entry. */
2111 1.1 christos
2112 1.1 christos struct ppc_elf_link_hash_entry
2113 1.1 christos {
2114 1.1 christos struct elf_link_hash_entry elf;
2115 1.1 christos
2116 1.1 christos /* If this symbol is used in the linker created sections, the processor
2117 1.1 christos specific backend uses this field to map the field into the offset
2118 1.7 christos from the beginning of the section. */
2119 1.7 christos elf_linker_section_pointers_t *linker_section_pointer;
2120 1.7 christos
2121 1.7 christos /* Track dynamic relocs copied for this symbol. */
2122 1.7 christos struct elf_dyn_relocs *dyn_relocs;
2123 1.7 christos
2124 1.9 christos /* Contexts in which symbol is used in the GOT.
2125 1.7 christos Bits are or'd into the mask as the corresponding relocs are
2126 1.7 christos encountered during check_relocs, with TLS_TLS being set when any
2127 1.7 christos of the other TLS bits are set. tls_optimize clears bits when
2128 1.7 christos optimizing to indicate the corresponding GOT entry type is not
2129 1.7 christos needed. If set, TLS_TLS is never cleared. tls_optimize may also
2130 1.7 christos set TLS_GDIE when a GD reloc turns into an IE one.
2131 1.7 christos These flags are also kept for local symbols. */
2132 1.9 christos #define TLS_TLS 1 /* Any TLS reloc. */
2133 1.7 christos #define TLS_GD 2 /* GD reloc. */
2134 1.7 christos #define TLS_LD 4 /* LD reloc. */
2135 1.7 christos #define TLS_TPREL 8 /* TPREL reloc, => IE. */
2136 1.7 christos #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
2137 1.7 christos #define TLS_MARK 32 /* __tls_get_addr call marked. */
2138 1.7 christos #define TLS_GDIE 64 /* GOT TPREL reloc resulting from GD->IE. */
2139 1.7 christos unsigned char tls_mask;
2140 1.1 christos
2141 1.1 christos /* The above field is also used to mark function symbols. In which
2142 1.1 christos case TLS_TLS will be 0. */
2143 1.3 christos #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
2144 1.3 christos #define PLT_KEEP 4 /* inline plt call requires plt entry. */
2145 1.3 christos #define NON_GOT 256 /* local symbol plt, not stored. */
2146 1.3 christos
2147 1.3 christos /* Nonzero if we have seen a small data relocation referring to this
2148 1.1 christos symbol. */
2149 1.1 christos unsigned char has_sda_refs : 1;
2150 1.1 christos
2151 1.1 christos /* Flag use of given relocations. */
2152 1.1 christos unsigned char has_addr16_ha : 1;
2153 1.1 christos unsigned char has_addr16_lo : 1;
2154 1.1 christos };
2155 1.1 christos
2156 1.1 christos #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2157 1.1 christos
2158 1.3 christos /* PPC ELF linker hash table. */
2159 1.3 christos
2160 1.3 christos struct ppc_elf_link_hash_table
2161 1.1 christos {
2162 1.1 christos struct elf_link_hash_table elf;
2163 1.1 christos
2164 1.1 christos /* Various options passed from the linker. */
2165 1.1 christos struct ppc_elf_params *params;
2166 1.1 christos
2167 1.1 christos /* Short-cuts to get to dynamic linker sections. */
2168 1.7 christos asection *glink;
2169 1.7 christos asection *dynsbss;
2170 1.1 christos asection *relsbss;
2171 1.1 christos elf_linker_section_t sdata[2];
2172 1.1 christos asection *sbss;
2173 1.1 christos asection *glink_eh_frame;
2174 1.1 christos asection *pltlocal;
2175 1.1 christos asection *relpltlocal;
2176 1.1 christos
2177 1.1 christos /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2178 1.1 christos asection *srelplt2;
2179 1.1 christos
2180 1.1 christos /* Shortcut to __tls_get_addr. */
2181 1.1 christos struct elf_link_hash_entry *tls_get_addr;
2182 1.1 christos
2183 1.1 christos /* The bfd that forced an old-style PLT. */
2184 1.1 christos bfd *old_bfd;
2185 1.1 christos
2186 1.1 christos /* TLS local dynamic got entry handling. */
2187 1.1 christos union {
2188 1.1 christos bfd_signed_vma refcount;
2189 1.1 christos bfd_vma offset;
2190 1.1 christos } tlsld_got;
2191 1.1 christos
2192 1.1 christos /* Offset of branch table to PltResolve function in glink. */
2193 1.1 christos bfd_vma glink_pltresolve;
2194 1.1 christos
2195 1.1 christos /* Size of reserved GOT entries. */
2196 1.1 christos unsigned int got_header_size;
2197 1.1 christos /* Non-zero if allocating the header left a gap. */
2198 1.1 christos unsigned int got_gap;
2199 1.1 christos
2200 1.7 christos /* The type of PLT we have chosen to use. */
2201 1.7 christos enum ppc_elf_plt_type plt_type;
2202 1.7 christos
2203 1.7 christos /* True if the target system is VxWorks. */
2204 1.7 christos unsigned int is_vxworks:1;
2205 1.7 christos
2206 1.7 christos /* Whether there exist local gnu indirect function resolvers,
2207 1.7 christos referenced by dynamic relocations. */
2208 1.7 christos unsigned int local_ifunc_resolver:1;
2209 1.7 christos unsigned int maybe_local_ifunc_resolver:1;
2210 1.7 christos
2211 1.1 christos /* Set if tls optimization is enabled. */
2212 1.1 christos unsigned int do_tls_opt:1;
2213 1.1 christos
2214 1.1 christos /* Set if inline plt calls should be converted to direct calls. */
2215 1.1 christos unsigned int can_convert_all_inline_plt:1;
2216 1.1 christos
2217 1.1 christos /* The size of PLT entries. */
2218 1.1 christos int plt_entry_size;
2219 1.1 christos /* The distance between adjacent PLT slots. */
2220 1.1 christos int plt_slot_size;
2221 1.1 christos /* The size of the first PLT entry. */
2222 1.1 christos int plt_initial_entry_size;
2223 1.1 christos
2224 1.1 christos /* Small local sym cache. */
2225 1.1 christos struct sym_cache sym_cache;
2226 1.1 christos };
2227 1.1 christos
2228 1.9 christos /* Rename some of the generic section flags to better document how they
2229 1.9 christos are used for ppc32. The flags are only valid for ppc32 elf objects. */
2230 1.9 christos
2231 1.1 christos /* Nonzero if this section has TLS related relocations. */
2232 1.7 christos #define has_tls_reloc sec_flg0
2233 1.7 christos
2234 1.7 christos /* Nonzero if this section has a call to __tls_get_addr lacking marker
2235 1.1 christos relocs. */
2236 1.1 christos #define nomark_tls_get_addr sec_flg1
2237 1.1 christos
2238 1.1 christos /* Flag set when PLTCALL relocs are detected. */
2239 1.1 christos #define has_pltcall sec_flg2
2240 1.1 christos
2241 1.1 christos /* Get the PPC ELF linker hash table from a link_info structure. */
2242 1.1 christos
2243 1.1 christos #define ppc_elf_hash_table(p) \
2244 1.1 christos (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
2245 1.1 christos == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
2246 1.1 christos
2247 1.1 christos /* Create an entry in a PPC ELF linker hash table. */
2248 1.1 christos
2249 1.1 christos static struct bfd_hash_entry *
2250 1.1 christos ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2251 1.1 christos struct bfd_hash_table *table,
2252 1.1 christos const char *string)
2253 1.1 christos {
2254 1.1 christos /* Allocate the structure if it has not already been allocated by a
2255 1.1 christos subclass. */
2256 1.1 christos if (entry == NULL)
2257 1.1 christos {
2258 1.1 christos entry = bfd_hash_allocate (table,
2259 1.1 christos sizeof (struct ppc_elf_link_hash_entry));
2260 1.1 christos if (entry == NULL)
2261 1.1 christos return entry;
2262 1.1 christos }
2263 1.1 christos
2264 1.1 christos /* Call the allocation method of the superclass. */
2265 1.1 christos entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2266 1.1 christos if (entry != NULL)
2267 1.1 christos {
2268 1.1 christos ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2269 1.1 christos ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2270 1.1 christos ppc_elf_hash_entry (entry)->tls_mask = 0;
2271 1.1 christos ppc_elf_hash_entry (entry)->has_sda_refs = 0;
2272 1.1 christos }
2273 1.1 christos
2274 1.1 christos return entry;
2275 1.1 christos }
2276 1.1 christos
2277 1.7 christos /* Create a PPC ELF linker hash table. */
2278 1.7 christos
2279 1.1 christos static struct bfd_link_hash_table *
2280 1.1 christos ppc_elf_link_hash_table_create (bfd *abfd)
2281 1.1 christos {
2282 1.1 christos struct ppc_elf_link_hash_table *ret;
2283 1.1 christos static struct ppc_elf_params default_params
2284 1.1 christos = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 };
2285 1.1 christos
2286 1.1 christos ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2287 1.1 christos if (ret == NULL)
2288 1.1 christos return NULL;
2289 1.1 christos
2290 1.1 christos if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2291 1.1 christos ppc_elf_link_hash_newfunc,
2292 1.1 christos sizeof (struct ppc_elf_link_hash_entry),
2293 1.1 christos PPC32_ELF_DATA))
2294 1.1 christos {
2295 1.1 christos free (ret);
2296 1.1 christos return NULL;
2297 1.1 christos }
2298 1.3 christos
2299 1.3 christos ret->elf.init_plt_refcount.refcount = 0;
2300 1.1 christos ret->elf.init_plt_refcount.glist = NULL;
2301 1.1 christos ret->elf.init_plt_offset.offset = 0;
2302 1.1 christos ret->elf.init_plt_offset.glist = NULL;
2303 1.1 christos
2304 1.1 christos ret->params = &default_params;
2305 1.1 christos
2306 1.1 christos ret->sdata[0].name = ".sdata";
2307 1.1 christos ret->sdata[0].sym_name = "_SDA_BASE_";
2308 1.1 christos ret->sdata[0].bss_name = ".sbss";
2309 1.1 christos
2310 1.1 christos ret->sdata[1].name = ".sdata2";
2311 1.1 christos ret->sdata[1].sym_name = "_SDA2_BASE_";
2312 1.1 christos ret->sdata[1].bss_name = ".sbss2";
2313 1.1 christos
2314 1.1 christos ret->plt_entry_size = 12;
2315 1.3 christos ret->plt_slot_size = 8;
2316 1.3 christos ret->plt_initial_entry_size = 72;
2317 1.3 christos
2318 1.3 christos return &ret->elf.root;
2319 1.3 christos }
2320 1.3 christos
2321 1.3 christos /* Hook linker params into hash table. */
2322 1.3 christos
2323 1.3 christos void
2324 1.7 christos ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
2325 1.3 christos {
2326 1.3 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2327 1.1 christos
2328 1.1 christos if (htab)
2329 1.1 christos htab->params = params;
2330 1.1 christos params->pagesize_p2 = bfd_log2 (params->pagesize);
2331 1.1 christos }
2332 1.1 christos
2333 1.1 christos /* Create .got and the related sections. */
2334 1.1 christos
2335 1.1 christos static bfd_boolean
2336 1.1 christos ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2337 1.1 christos {
2338 1.7 christos struct ppc_elf_link_hash_table *htab;
2339 1.1 christos
2340 1.1 christos if (!_bfd_elf_create_got_section (abfd, info))
2341 1.1 christos return FALSE;
2342 1.7 christos
2343 1.7 christos htab = ppc_elf_hash_table (info);
2344 1.9 christos if (!htab->is_vxworks)
2345 1.1 christos {
2346 1.1 christos /* The powerpc .got has a blrl instruction in it. Mark it
2347 1.1 christos executable. */
2348 1.1 christos flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2349 1.1 christos | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2350 1.1 christos if (!bfd_set_section_flags (htab->elf.sgot, flags))
2351 1.3 christos return FALSE;
2352 1.3 christos }
2353 1.3 christos
2354 1.3 christos return TRUE;
2355 1.3 christos }
2356 1.3 christos
2357 1.3 christos /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
2358 1.3 christos R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
2359 1.3 christos and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
2360 1.3 christos
2361 1.3 christos static bfd_boolean
2362 1.3 christos ppc_elf_create_linker_section (bfd *abfd,
2363 1.3 christos struct bfd_link_info *info,
2364 1.3 christos flagword flags,
2365 1.3 christos elf_linker_section_t *lsect)
2366 1.3 christos {
2367 1.3 christos asection *s;
2368 1.3 christos
2369 1.3 christos flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2370 1.3 christos | SEC_LINKER_CREATED);
2371 1.3 christos
2372 1.3 christos s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
2373 1.3 christos if (s == NULL)
2374 1.3 christos return FALSE;
2375 1.3 christos lsect->section = s;
2376 1.3 christos
2377 1.3 christos /* Define the sym on the first section of this name. */
2378 1.3 christos s = bfd_get_section_by_name (abfd, lsect->name);
2379 1.3 christos
2380 1.3 christos lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
2381 1.1 christos if (lsect->sym == NULL)
2382 1.1 christos return FALSE;
2383 1.1 christos lsect->sym->root.u.def.value = 0x8000;
2384 1.1 christos return TRUE;
2385 1.1 christos }
2386 1.1 christos
2387 1.7 christos static bfd_boolean
2388 1.1 christos ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2389 1.1 christos {
2390 1.1 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2391 1.1 christos asection *s;
2392 1.1 christos flagword flags;
2393 1.7 christos int p2align;
2394 1.7 christos
2395 1.7 christos flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2396 1.1 christos | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2397 1.9 christos s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2398 1.1 christos htab->glink = s;
2399 1.1 christos p2align = htab->params->ppc476_workaround ? 6 : 4;
2400 1.1 christos if (p2align < htab->params->plt_stub_align)
2401 1.1 christos p2align = htab->params->plt_stub_align;
2402 1.1 christos if (s == NULL
2403 1.1 christos || !bfd_set_section_alignment (s, p2align))
2404 1.1 christos return FALSE;
2405 1.1 christos
2406 1.1 christos if (!info->no_ld_generated_unwind_info)
2407 1.9 christos {
2408 1.1 christos flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2409 1.1 christos | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2410 1.1 christos s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
2411 1.1 christos htab->glink_eh_frame = s;
2412 1.1 christos if (s == NULL
2413 1.7 christos || !bfd_set_section_alignment (s, 2))
2414 1.1 christos return FALSE;
2415 1.9 christos }
2416 1.1 christos
2417 1.1 christos flags = SEC_ALLOC | SEC_LINKER_CREATED;
2418 1.1 christos s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2419 1.1 christos htab->elf.iplt = s;
2420 1.1 christos if (s == NULL
2421 1.7 christos || !bfd_set_section_alignment (s, 4))
2422 1.1 christos return FALSE;
2423 1.9 christos
2424 1.1 christos flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2425 1.3 christos | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2426 1.7 christos s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
2427 1.7 christos htab->elf.irelplt = s;
2428 1.7 christos if (s == NULL
2429 1.7 christos || ! bfd_set_section_alignment (s, 2))
2430 1.7 christos return FALSE;
2431 1.7 christos
2432 1.9 christos /* Local plt entries. */
2433 1.7 christos flags = (SEC_ALLOC | SEC_LOAD
2434 1.7 christos | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2435 1.7 christos htab->pltlocal = bfd_make_section_anyway_with_flags (abfd, ".branch_lt",
2436 1.7 christos flags);
2437 1.7 christos if (htab->pltlocal == NULL
2438 1.7 christos || !bfd_set_section_alignment (htab->pltlocal, 2))
2439 1.7 christos return FALSE;
2440 1.7 christos
2441 1.7 christos if (bfd_link_pic (info))
2442 1.9 christos {
2443 1.7 christos flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
2444 1.7 christos | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2445 1.7 christos htab->relpltlocal
2446 1.3 christos = bfd_make_section_anyway_with_flags (abfd, ".rela.branch_lt", flags);
2447 1.3 christos if (htab->relpltlocal == NULL
2448 1.3 christos || !bfd_set_section_alignment (htab->relpltlocal, 2))
2449 1.3 christos return FALSE;
2450 1.3 christos }
2451 1.3 christos
2452 1.3 christos if (!ppc_elf_create_linker_section (abfd, info, 0,
2453 1.3 christos &htab->sdata[0]))
2454 1.1 christos return FALSE;
2455 1.1 christos
2456 1.1 christos if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
2457 1.1 christos &htab->sdata[1]))
2458 1.1 christos return FALSE;
2459 1.1 christos
2460 1.1 christos return TRUE;
2461 1.1 christos }
2462 1.1 christos
2463 1.1 christos /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2464 1.1 christos to output sections (just like _bfd_elf_create_dynamic_sections has
2465 1.1 christos to create .dynbss and .rela.bss). */
2466 1.1 christos
2467 1.1 christos static bfd_boolean
2468 1.1 christos ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2469 1.1 christos {
2470 1.7 christos struct ppc_elf_link_hash_table *htab;
2471 1.1 christos asection *s;
2472 1.1 christos flagword flags;
2473 1.1 christos
2474 1.1 christos htab = ppc_elf_hash_table (info);
2475 1.1 christos
2476 1.1 christos if (htab->elf.sgot == NULL
2477 1.1 christos && !ppc_elf_create_got (abfd, info))
2478 1.1 christos return FALSE;
2479 1.1 christos
2480 1.1 christos if (!_bfd_elf_create_dynamic_sections (abfd, info))
2481 1.1 christos return FALSE;
2482 1.1 christos
2483 1.1 christos if (htab->glink == NULL
2484 1.1 christos && !ppc_elf_create_glink (abfd, info))
2485 1.1 christos return FALSE;
2486 1.1 christos
2487 1.3 christos s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
2488 1.1 christos SEC_ALLOC | SEC_LINKER_CREATED);
2489 1.1 christos htab->dynsbss = s;
2490 1.1 christos if (s == NULL)
2491 1.1 christos return FALSE;
2492 1.1 christos
2493 1.1 christos if (! bfd_link_pic (info))
2494 1.9 christos {
2495 1.1 christos flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2496 1.1 christos | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2497 1.1 christos s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
2498 1.1 christos htab->relsbss = s;
2499 1.1 christos if (s == NULL
2500 1.1 christos || !bfd_set_section_alignment (s, 2))
2501 1.1 christos return FALSE;
2502 1.7 christos }
2503 1.1 christos
2504 1.1 christos if (htab->is_vxworks
2505 1.1 christos && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2506 1.1 christos return FALSE;
2507 1.9 christos
2508 1.1 christos s = htab->elf.splt;
2509 1.1 christos flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2510 1.1 christos if (htab->plt_type == PLT_VXWORKS)
2511 1.1 christos /* The VxWorks PLT is a loaded section with contents. */
2512 1.1 christos flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2513 1.1 christos return bfd_set_section_flags (s, flags);
2514 1.1 christos }
2515 1.1 christos
2516 1.1 christos /* Copy the extra info we tack onto an elf_link_hash_entry. */
2517 1.1 christos
2518 1.1 christos static void
2519 1.1 christos ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2520 1.1 christos struct elf_link_hash_entry *dir,
2521 1.1 christos struct elf_link_hash_entry *ind)
2522 1.1 christos {
2523 1.1 christos struct ppc_elf_link_hash_entry *edir, *eind;
2524 1.1 christos
2525 1.7 christos edir = (struct ppc_elf_link_hash_entry *) dir;
2526 1.7 christos eind = (struct ppc_elf_link_hash_entry *) ind;
2527 1.1 christos
2528 1.1 christos edir->tls_mask |= eind->tls_mask;
2529 1.7 christos edir->has_sda_refs |= eind->has_sda_refs;
2530 1.1 christos
2531 1.1 christos if (edir->elf.versioned != versioned_hidden)
2532 1.1 christos edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2533 1.7 christos edir->elf.ref_regular |= eind->elf.ref_regular;
2534 1.7 christos edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2535 1.7 christos edir->elf.non_got_ref |= eind->elf.non_got_ref;
2536 1.7 christos edir->elf.needs_plt |= eind->elf.needs_plt;
2537 1.1 christos edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2538 1.1 christos
2539 1.1 christos /* If we were called to copy over info for a weak sym, that's all. */
2540 1.1 christos if (eind->elf.root.type != bfd_link_hash_indirect)
2541 1.1 christos return;
2542 1.1 christos
2543 1.1 christos if (eind->dyn_relocs != NULL)
2544 1.1 christos {
2545 1.1 christos if (edir->dyn_relocs != NULL)
2546 1.1 christos {
2547 1.1 christos struct elf_dyn_relocs **pp;
2548 1.1 christos struct elf_dyn_relocs *p;
2549 1.1 christos
2550 1.1 christos /* Add reloc counts against the indirect sym to the direct sym
2551 1.1 christos list. Merge any entries against the same section. */
2552 1.1 christos for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2553 1.1 christos {
2554 1.1 christos struct elf_dyn_relocs *q;
2555 1.1 christos
2556 1.1 christos for (q = edir->dyn_relocs; q != NULL; q = q->next)
2557 1.1 christos if (q->sec == p->sec)
2558 1.1 christos {
2559 1.1 christos q->pc_count += p->pc_count;
2560 1.1 christos q->count += p->count;
2561 1.1 christos *pp = p->next;
2562 1.1 christos break;
2563 1.1 christos }
2564 1.1 christos if (q == NULL)
2565 1.1 christos pp = &p->next;
2566 1.1 christos }
2567 1.1 christos *pp = edir->dyn_relocs;
2568 1.1 christos }
2569 1.1 christos
2570 1.1 christos edir->dyn_relocs = eind->dyn_relocs;
2571 1.1 christos eind->dyn_relocs = NULL;
2572 1.1 christos }
2573 1.1 christos
2574 1.1 christos /* Copy over the GOT refcount entries that we may have already seen to
2575 1.1 christos the symbol which just became indirect. */
2576 1.1 christos edir->elf.got.refcount += eind->elf.got.refcount;
2577 1.1 christos eind->elf.got.refcount = 0;
2578 1.1 christos
2579 1.1 christos /* And plt entries. */
2580 1.1 christos if (eind->elf.plt.plist != NULL)
2581 1.1 christos {
2582 1.1 christos if (edir->elf.plt.plist != NULL)
2583 1.1 christos {
2584 1.1 christos struct plt_entry **entp;
2585 1.1 christos struct plt_entry *ent;
2586 1.1 christos
2587 1.1 christos for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2588 1.1 christos {
2589 1.1 christos struct plt_entry *dent;
2590 1.1 christos
2591 1.1 christos for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2592 1.1 christos if (dent->sec == ent->sec && dent->addend == ent->addend)
2593 1.1 christos {
2594 1.1 christos dent->plt.refcount += ent->plt.refcount;
2595 1.1 christos *entp = ent->next;
2596 1.1 christos break;
2597 1.1 christos }
2598 1.1 christos if (dent == NULL)
2599 1.1 christos entp = &ent->next;
2600 1.1 christos }
2601 1.1 christos *entp = edir->elf.plt.plist;
2602 1.1 christos }
2603 1.1 christos
2604 1.1 christos edir->elf.plt.plist = eind->elf.plt.plist;
2605 1.1 christos eind->elf.plt.plist = NULL;
2606 1.1 christos }
2607 1.1 christos
2608 1.1 christos if (eind->elf.dynindx != -1)
2609 1.1 christos {
2610 1.1 christos if (edir->elf.dynindx != -1)
2611 1.1 christos _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2612 1.1 christos edir->elf.dynstr_index);
2613 1.1 christos edir->elf.dynindx = eind->elf.dynindx;
2614 1.1 christos edir->elf.dynstr_index = eind->elf.dynstr_index;
2615 1.1 christos eind->elf.dynindx = -1;
2616 1.1 christos eind->elf.dynstr_index = 0;
2617 1.1 christos }
2618 1.1 christos }
2619 1.1 christos
2620 1.1 christos /* Hook called by the linker routine which adds symbols from an object
2621 1.1 christos file. We use it to put .comm items in .sbss, and not .bss. */
2622 1.1 christos
2623 1.1 christos static bfd_boolean
2624 1.1 christos ppc_elf_add_symbol_hook (bfd *abfd,
2625 1.1 christos struct bfd_link_info *info,
2626 1.1 christos Elf_Internal_Sym *sym,
2627 1.3 christos const char **namep ATTRIBUTE_UNUSED,
2628 1.1 christos flagword *flagsp ATTRIBUTE_UNUSED,
2629 1.1 christos asection **secp,
2630 1.1 christos bfd_vma *valp)
2631 1.1 christos {
2632 1.1 christos if (sym->st_shndx == SHN_COMMON
2633 1.1 christos && !bfd_link_relocatable (info)
2634 1.1 christos && is_ppc_elf (info->output_bfd)
2635 1.1 christos && sym->st_size <= elf_gp_size (abfd))
2636 1.1 christos {
2637 1.1 christos /* Common symbols less than or equal to -G nn bytes are automatically
2638 1.1 christos put into .sbss. */
2639 1.1 christos struct ppc_elf_link_hash_table *htab;
2640 1.1 christos
2641 1.1 christos htab = ppc_elf_hash_table (info);
2642 1.1 christos if (htab->sbss == NULL)
2643 1.1 christos {
2644 1.1 christos flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2645 1.1 christos
2646 1.1 christos if (!htab->elf.dynobj)
2647 1.1 christos htab->elf.dynobj = abfd;
2648 1.1 christos
2649 1.1 christos htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2650 1.1 christos ".sbss",
2651 1.1 christos flags);
2652 1.1 christos if (htab->sbss == NULL)
2653 1.1 christos return FALSE;
2654 1.1 christos }
2655 1.1 christos
2656 1.1 christos *secp = htab->sbss;
2657 1.1 christos *valp = sym->st_size;
2658 1.1 christos }
2659 1.1 christos
2660 1.1 christos return TRUE;
2661 1.1 christos }
2662 1.1 christos
2663 1.1 christos /* Find a linker generated pointer with a given addend and type. */
2665 1.1 christos
2666 1.1 christos static elf_linker_section_pointers_t *
2667 1.1 christos elf_find_pointer_linker_section
2668 1.1 christos (elf_linker_section_pointers_t *linker_pointers,
2669 1.1 christos bfd_vma addend,
2670 1.1 christos elf_linker_section_t *lsect)
2671 1.1 christos {
2672 1.1 christos for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2673 1.1 christos if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2674 1.1 christos return linker_pointers;
2675 1.3 christos
2676 1.3 christos return NULL;
2677 1.3 christos }
2678 1.3 christos
2679 1.1 christos /* Allocate a pointer to live in a linker created section. */
2680 1.1 christos
2681 1.1 christos static bfd_boolean
2682 1.1 christos elf_allocate_pointer_linker_section (bfd *abfd,
2683 1.1 christos elf_linker_section_t *lsect,
2684 1.1 christos struct elf_link_hash_entry *h,
2685 1.1 christos const Elf_Internal_Rela *rel)
2686 1.1 christos {
2687 1.1 christos elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2688 1.1 christos elf_linker_section_pointers_t *linker_section_ptr;
2689 1.1 christos unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2690 1.1 christos bfd_size_type amt;
2691 1.1 christos
2692 1.1 christos BFD_ASSERT (lsect != NULL);
2693 1.1 christos
2694 1.1 christos /* Is this a global symbol? */
2695 1.1 christos if (h != NULL)
2696 1.1 christos {
2697 1.1 christos struct ppc_elf_link_hash_entry *eh;
2698 1.1 christos
2699 1.1 christos /* Has this symbol already been allocated? If so, our work is done. */
2700 1.1 christos eh = (struct ppc_elf_link_hash_entry *) h;
2701 1.1 christos if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2702 1.1 christos rel->r_addend,
2703 1.1 christos lsect))
2704 1.1 christos return TRUE;
2705 1.1 christos
2706 1.1 christos ptr_linker_section_ptr = &eh->linker_section_pointer;
2707 1.1 christos }
2708 1.1 christos else
2709 1.1 christos {
2710 1.1 christos BFD_ASSERT (is_ppc_elf (abfd));
2711 1.1 christos
2712 1.1 christos /* Allocation of a pointer to a local symbol. */
2713 1.1 christos elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2714 1.1 christos
2715 1.1 christos /* Allocate a table to hold the local symbols if first time. */
2716 1.1 christos if (!ptr)
2717 1.1 christos {
2718 1.1 christos unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
2719 1.1 christos
2720 1.1 christos amt = num_symbols;
2721 1.1 christos amt *= sizeof (elf_linker_section_pointers_t *);
2722 1.1 christos ptr = bfd_zalloc (abfd, amt);
2723 1.1 christos
2724 1.1 christos if (!ptr)
2725 1.1 christos return FALSE;
2726 1.1 christos
2727 1.1 christos elf_local_ptr_offsets (abfd) = ptr;
2728 1.1 christos }
2729 1.1 christos
2730 1.1 christos /* Has this symbol already been allocated? If so, our work is done. */
2731 1.1 christos if (elf_find_pointer_linker_section (ptr[r_symndx],
2732 1.1 christos rel->r_addend,
2733 1.1 christos lsect))
2734 1.1 christos return TRUE;
2735 1.1 christos
2736 1.1 christos ptr_linker_section_ptr = &ptr[r_symndx];
2737 1.1 christos }
2738 1.1 christos
2739 1.1 christos /* Allocate space for a pointer in the linker section, and allocate
2740 1.1 christos a new pointer record from internal memory. */
2741 1.1 christos BFD_ASSERT (ptr_linker_section_ptr != NULL);
2742 1.1 christos amt = sizeof (elf_linker_section_pointers_t);
2743 1.1 christos linker_section_ptr = bfd_alloc (abfd, amt);
2744 1.1 christos
2745 1.1 christos if (!linker_section_ptr)
2746 1.9 christos return FALSE;
2747 1.3 christos
2748 1.1 christos linker_section_ptr->next = *ptr_linker_section_ptr;
2749 1.1 christos linker_section_ptr->addend = rel->r_addend;
2750 1.1 christos linker_section_ptr->lsect = lsect;
2751 1.1 christos *ptr_linker_section_ptr = linker_section_ptr;
2752 1.1 christos
2753 1.1 christos if (!bfd_set_section_alignment (lsect->section, 2))
2754 1.1 christos return FALSE;
2755 1.1 christos linker_section_ptr->offset = lsect->section->size;
2756 1.1 christos lsect->section->size += 4;
2757 1.1 christos
2758 1.1 christos #ifdef DEBUG
2759 1.1 christos fprintf (stderr,
2760 1.1 christos "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2761 1.1 christos lsect->name, (long) linker_section_ptr->offset,
2762 1.1 christos (long) lsect->section->size);
2763 1.1 christos #endif
2764 1.1 christos
2765 1.1 christos return TRUE;
2766 1.1 christos }
2767 1.1 christos
2768 1.1 christos static struct plt_entry **
2769 1.7 christos update_local_sym_info (bfd *abfd,
2770 1.1 christos Elf_Internal_Shdr *symtab_hdr,
2771 1.1 christos unsigned long r_symndx,
2772 1.1 christos int tls_type)
2773 1.1 christos {
2774 1.1 christos bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2775 1.1 christos struct plt_entry **local_plt;
2776 1.1 christos unsigned char *local_got_tls_masks;
2777 1.1 christos
2778 1.1 christos if (local_got_refcounts == NULL)
2779 1.1 christos {
2780 1.1 christos bfd_size_type size = symtab_hdr->sh_info;
2781 1.1 christos
2782 1.1 christos size *= (sizeof (*local_got_refcounts)
2783 1.1 christos + sizeof (*local_plt)
2784 1.1 christos + sizeof (*local_got_tls_masks));
2785 1.7 christos local_got_refcounts = bfd_zalloc (abfd, size);
2786 1.7 christos if (local_got_refcounts == NULL)
2787 1.7 christos return NULL;
2788 1.1 christos elf_local_got_refcounts (abfd) = local_got_refcounts;
2789 1.1 christos }
2790 1.1 christos
2791 1.1 christos local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
2792 1.1 christos local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
2793 1.1 christos local_got_tls_masks[r_symndx] |= tls_type & 0xff;
2794 1.1 christos if ((tls_type & NON_GOT) == 0)
2795 1.1 christos local_got_refcounts[r_symndx] += 1;
2796 1.1 christos return local_plt + r_symndx;
2797 1.1 christos }
2798 1.1 christos
2799 1.1 christos static bfd_boolean
2800 1.1 christos update_plt_info (bfd *abfd, struct plt_entry **plist,
2801 1.1 christos asection *sec, bfd_vma addend)
2802 1.1 christos {
2803 1.1 christos struct plt_entry *ent;
2804 1.1 christos
2805 1.1 christos if (addend < 32768)
2806 1.1 christos sec = NULL;
2807 1.1 christos for (ent = *plist; ent != NULL; ent = ent->next)
2808 1.1 christos if (ent->sec == sec && ent->addend == addend)
2809 1.1 christos break;
2810 1.1 christos if (ent == NULL)
2811 1.1 christos {
2812 1.1 christos bfd_size_type amt = sizeof (*ent);
2813 1.1 christos ent = bfd_alloc (abfd, amt);
2814 1.1 christos if (ent == NULL)
2815 1.1 christos return FALSE;
2816 1.1 christos ent->next = *plist;
2817 1.1 christos ent->sec = sec;
2818 1.1 christos ent->addend = addend;
2819 1.1 christos ent->plt.refcount = 0;
2820 1.1 christos *plist = ent;
2821 1.1 christos }
2822 1.1 christos ent->plt.refcount += 1;
2823 1.1 christos return TRUE;
2824 1.1 christos }
2825 1.1 christos
2826 1.1 christos static struct plt_entry *
2827 1.1 christos find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
2828 1.1 christos {
2829 1.1 christos struct plt_entry *ent;
2830 1.1 christos
2831 1.1 christos if (addend < 32768)
2832 1.1 christos sec = NULL;
2833 1.1 christos for (ent = *plist; ent != NULL; ent = ent->next)
2834 1.1 christos if (ent->sec == sec && ent->addend == addend)
2835 1.1 christos break;
2836 1.1 christos return ent;
2837 1.1 christos }
2838 1.1 christos
2839 1.1 christos static bfd_boolean
2840 1.1 christos is_branch_reloc (enum elf_ppc_reloc_type r_type)
2841 1.1 christos {
2842 1.1 christos return (r_type == R_PPC_PLTREL24
2843 1.1 christos || r_type == R_PPC_LOCAL24PC
2844 1.7 christos || r_type == R_PPC_REL24
2845 1.7 christos || r_type == R_PPC_REL14
2846 1.7 christos || r_type == R_PPC_REL14_BRTAKEN
2847 1.7 christos || r_type == R_PPC_REL14_BRNTAKEN
2848 1.7 christos || r_type == R_PPC_ADDR24
2849 1.7 christos || r_type == R_PPC_ADDR14
2850 1.7 christos || r_type == R_PPC_ADDR14_BRTAKEN
2851 1.7 christos || r_type == R_PPC_ADDR14_BRNTAKEN
2852 1.7 christos || r_type == R_PPC_VLE_REL24);
2853 1.7 christos }
2854 1.7 christos
2855 1.7 christos /* Relocs on inline plt call sequence insns prior to the call. */
2856 1.7 christos
2857 1.1 christos static bfd_boolean
2858 1.1 christos is_plt_seq_reloc (enum elf_ppc_reloc_type r_type)
2859 1.1 christos {
2860 1.1 christos return (r_type == R_PPC_PLT16_HA
2861 1.1 christos || r_type == R_PPC_PLT16_HI
2862 1.7 christos || r_type == R_PPC_PLT16_LO
2863 1.7 christos || r_type == R_PPC_PLTSEQ);
2864 1.7 christos }
2865 1.1 christos
2866 1.1 christos static void
2867 1.1 christos bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2868 1.1 christos {
2869 1.1 christos _bfd_error_handler
2870 1.1 christos /* xgettext:c-format */
2871 1.1 christos (_("%pB: relocation %s cannot be used when making a shared object"),
2872 1.1 christos abfd,
2873 1.1 christos ppc_elf_howto_table[r_type]->name);
2874 1.1 christos bfd_set_error (bfd_error_bad_value);
2875 1.1 christos }
2876 1.1 christos
2877 1.1 christos /* Look through the relocs for a section during the first phase, and
2878 1.1 christos allocate space in the global offset table or procedure linkage
2879 1.1 christos table. */
2880 1.1 christos
2881 1.1 christos static bfd_boolean
2882 1.1 christos ppc_elf_check_relocs (bfd *abfd,
2883 1.1 christos struct bfd_link_info *info,
2884 1.1 christos asection *sec,
2885 1.1 christos const Elf_Internal_Rela *relocs)
2886 1.1 christos {
2887 1.1 christos struct ppc_elf_link_hash_table *htab;
2888 1.3 christos Elf_Internal_Shdr *symtab_hdr;
2889 1.1 christos struct elf_link_hash_entry **sym_hashes;
2890 1.1 christos const Elf_Internal_Rela *rel;
2891 1.1 christos const Elf_Internal_Rela *rel_end;
2892 1.1 christos asection *got2, *sreloc;
2893 1.1 christos struct elf_link_hash_entry *tga;
2894 1.1 christos
2895 1.1 christos if (bfd_link_relocatable (info))
2896 1.1 christos return TRUE;
2897 1.1 christos
2898 1.1 christos /* Don't do anything special with non-loaded, non-alloced sections.
2899 1.1 christos In particular, any relocs in such sections should not affect GOT
2900 1.1 christos and PLT reference counting (ie. we don't allow them to create GOT
2901 1.7 christos or PLT entries), there's no possibility or desire to optimize TLS
2902 1.1 christos relocs, and there's not much point in propagating relocs to shared
2903 1.1 christos libs that the dynamic linker won't relocate. */
2904 1.1 christos if ((sec->flags & SEC_ALLOC) == 0)
2905 1.1 christos return TRUE;
2906 1.1 christos
2907 1.1 christos #ifdef DEBUG
2908 1.1 christos _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB",
2909 1.1 christos sec, abfd);
2910 1.1 christos #endif
2911 1.1 christos
2912 1.1 christos BFD_ASSERT (is_ppc_elf (abfd));
2913 1.1 christos
2914 1.1 christos /* Initialize howto table if not already done. */
2915 1.1 christos if (!ppc_elf_howto_table[R_PPC_ADDR32])
2916 1.1 christos ppc_elf_howto_init ();
2917 1.1 christos
2918 1.1 christos htab = ppc_elf_hash_table (info);
2919 1.1 christos if (htab->glink == NULL)
2920 1.1 christos {
2921 1.1 christos if (htab->elf.dynobj == NULL)
2922 1.1 christos htab->elf.dynobj = abfd;
2923 1.1 christos if (!ppc_elf_create_glink (htab->elf.dynobj, info))
2924 1.1 christos return FALSE;
2925 1.1 christos }
2926 1.1 christos tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
2927 1.1 christos FALSE, FALSE, TRUE);
2928 1.1 christos symtab_hdr = &elf_symtab_hdr (abfd);
2929 1.1 christos sym_hashes = elf_sym_hashes (abfd);
2930 1.1 christos got2 = bfd_get_section_by_name (abfd, ".got2");
2931 1.1 christos sreloc = NULL;
2932 1.1 christos
2933 1.3 christos rel_end = relocs + sec->reloc_count;
2934 1.7 christos for (rel = relocs; rel < rel_end; rel++)
2935 1.7 christos {
2936 1.1 christos unsigned long r_symndx;
2937 1.1 christos enum elf_ppc_reloc_type r_type;
2938 1.1 christos struct elf_link_hash_entry *h;
2939 1.1 christos int tls_type;
2940 1.1 christos struct plt_entry **ifunc;
2941 1.1 christos struct plt_entry **pltent;
2942 1.1 christos bfd_vma addend;
2943 1.1 christos
2944 1.1 christos r_symndx = ELF32_R_SYM (rel->r_info);
2945 1.1 christos if (r_symndx < symtab_hdr->sh_info)
2946 1.1 christos h = NULL;
2947 1.1 christos else
2948 1.1 christos {
2949 1.1 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2950 1.1 christos while (h->root.type == bfd_link_hash_indirect
2951 1.1 christos || h->root.type == bfd_link_hash_warning)
2952 1.7 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
2953 1.1 christos }
2954 1.1 christos
2955 1.1 christos /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2956 1.1 christos This shows up in particular in an R_PPC_ADDR32 in the eabi
2957 1.1 christos startup code. */
2958 1.1 christos if (h != NULL
2959 1.1 christos && htab->elf.sgot == NULL
2960 1.1 christos && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2961 1.1 christos {
2962 1.1 christos if (htab->elf.dynobj == NULL)
2963 1.1 christos htab->elf.dynobj = abfd;
2964 1.3 christos if (!ppc_elf_create_got (htab->elf.dynobj, info))
2965 1.1 christos return FALSE;
2966 1.1 christos BFD_ASSERT (h == htab->elf.hgot);
2967 1.1 christos }
2968 1.1 christos
2969 1.1 christos tls_type = 0;
2970 1.1 christos r_type = ELF32_R_TYPE (rel->r_info);
2971 1.1 christos ifunc = NULL;
2972 1.3 christos if (h == NULL && !htab->is_vxworks)
2973 1.1 christos {
2974 1.3 christos Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2975 1.1 christos abfd, r_symndx);
2976 1.7 christos if (isym == NULL)
2977 1.1 christos return FALSE;
2978 1.1 christos
2979 1.1 christos if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2980 1.1 christos {
2981 1.1 christos /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
2982 1.1 christos ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
2983 1.3 christos NON_GOT | PLT_IFUNC);
2984 1.7 christos if (ifunc == NULL)
2985 1.7 christos return FALSE;
2986 1.7 christos
2987 1.7 christos /* STT_GNU_IFUNC symbols must have a PLT entry;
2988 1.1 christos In a non-pie executable even when there are
2989 1.7 christos no plt calls. */
2990 1.3 christos if (!bfd_link_pic (info)
2991 1.7 christos || is_branch_reloc (r_type)
2992 1.7 christos || r_type == R_PPC_PLT16_LO
2993 1.7 christos || r_type == R_PPC_PLT16_HI
2994 1.7 christos || r_type == R_PPC_PLT16_HA)
2995 1.7 christos {
2996 1.7 christos addend = 0;
2997 1.7 christos if (r_type == R_PPC_PLTREL24)
2998 1.3 christos ppc_elf_tdata (abfd)->makes_plt_call = 1;
2999 1.3 christos if (bfd_link_pic (info)
3000 1.1 christos && (r_type == R_PPC_PLTREL24
3001 1.1 christos || r_type == R_PPC_PLT16_LO
3002 1.1 christos || r_type == R_PPC_PLT16_HI
3003 1.1 christos || r_type == R_PPC_PLT16_HA))
3004 1.1 christos addend = rel->r_addend;
3005 1.1 christos if (!update_plt_info (abfd, ifunc, got2, addend))
3006 1.1 christos return FALSE;
3007 1.1 christos }
3008 1.1 christos }
3009 1.1 christos }
3010 1.1 christos
3011 1.1 christos if (!htab->is_vxworks
3012 1.1 christos && is_branch_reloc (r_type)
3013 1.1 christos && h != NULL
3014 1.1 christos && h == tga)
3015 1.1 christos {
3016 1.1 christos if (rel != relocs
3017 1.9 christos && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3018 1.1 christos || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3019 1.1 christos /* We have a new-style __tls_get_addr call with a marker
3020 1.1 christos reloc. */
3021 1.1 christos ;
3022 1.1 christos else
3023 1.1 christos /* Mark this section as having an old-style call. */
3024 1.1 christos sec->nomark_tls_get_addr = 1;
3025 1.1 christos }
3026 1.7 christos
3027 1.7 christos switch ((int)r_type)
3028 1.7 christos {
3029 1.7 christos case R_PPC_TLSGD:
3030 1.7 christos case R_PPC_TLSLD:
3031 1.7 christos /* These special tls relocs tie a call to __tls_get_addr with
3032 1.7 christos its parameter symbol. */
3033 1.7 christos if (h != NULL)
3034 1.7 christos ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK;
3035 1.1 christos else
3036 1.1 christos if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3037 1.1 christos NON_GOT | TLS_TLS | TLS_MARK))
3038 1.1 christos return FALSE;
3039 1.1 christos break;
3040 1.1 christos
3041 1.1 christos case R_PPC_PLTSEQ:
3042 1.1 christos break;
3043 1.1 christos
3044 1.1 christos case R_PPC_GOT_TLSLD16:
3045 1.1 christos case R_PPC_GOT_TLSLD16_LO:
3046 1.1 christos case R_PPC_GOT_TLSLD16_HI:
3047 1.1 christos case R_PPC_GOT_TLSLD16_HA:
3048 1.1 christos tls_type = TLS_TLS | TLS_LD;
3049 1.1 christos goto dogottls;
3050 1.1 christos
3051 1.1 christos case R_PPC_GOT_TLSGD16:
3052 1.1 christos case R_PPC_GOT_TLSGD16_LO:
3053 1.1 christos case R_PPC_GOT_TLSGD16_HI:
3054 1.1 christos case R_PPC_GOT_TLSGD16_HA:
3055 1.7 christos tls_type = TLS_TLS | TLS_GD;
3056 1.1 christos goto dogottls;
3057 1.1 christos
3058 1.1 christos case R_PPC_GOT_TPREL16:
3059 1.1 christos case R_PPC_GOT_TPREL16_LO:
3060 1.1 christos case R_PPC_GOT_TPREL16_HI:
3061 1.1 christos case R_PPC_GOT_TPREL16_HA:
3062 1.1 christos if (bfd_link_dll (info))
3063 1.1 christos info->flags |= DF_STATIC_TLS;
3064 1.1 christos tls_type = TLS_TLS | TLS_TPREL;
3065 1.1 christos goto dogottls;
3066 1.1 christos
3067 1.7 christos case R_PPC_GOT_DTPREL16:
3068 1.1 christos case R_PPC_GOT_DTPREL16_LO:
3069 1.1 christos case R_PPC_GOT_DTPREL16_HI:
3070 1.1 christos case R_PPC_GOT_DTPREL16_HA:
3071 1.1 christos tls_type = TLS_TLS | TLS_DTPREL;
3072 1.1 christos dogottls:
3073 1.1 christos sec->has_tls_reloc = 1;
3074 1.1 christos /* Fall through. */
3075 1.7 christos
3076 1.1 christos /* GOT16 relocations */
3077 1.1 christos case R_PPC_GOT16:
3078 1.1 christos case R_PPC_GOT16_LO:
3079 1.1 christos case R_PPC_GOT16_HI:
3080 1.1 christos case R_PPC_GOT16_HA:
3081 1.1 christos /* This symbol requires a global offset table entry. */
3082 1.1 christos if (htab->elf.sgot == NULL)
3083 1.1 christos {
3084 1.1 christos if (htab->elf.dynobj == NULL)
3085 1.1 christos htab->elf.dynobj = abfd;
3086 1.1 christos if (!ppc_elf_create_got (htab->elf.dynobj, info))
3087 1.1 christos return FALSE;
3088 1.1 christos }
3089 1.1 christos if (h != NULL)
3090 1.1 christos {
3091 1.1 christos h->got.refcount += 1;
3092 1.1 christos ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3093 1.1 christos }
3094 1.3 christos else
3095 1.1 christos /* This is a global offset table entry for a local symbol. */
3096 1.1 christos if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3097 1.1 christos return FALSE;
3098 1.1 christos
3099 1.1 christos /* We may also need a plt entry if the symbol turns out to be
3100 1.1 christos an ifunc. */
3101 1.1 christos if (h != NULL && !bfd_link_pic (info))
3102 1.1 christos {
3103 1.3 christos if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3104 1.3 christos return FALSE;
3105 1.3 christos }
3106 1.1 christos break;
3107 1.1 christos
3108 1.1 christos /* Indirect .sdata relocation. */
3109 1.1 christos case R_PPC_EMB_SDAI16:
3110 1.1 christos htab->sdata[0].sym->ref_regular = 1;
3111 1.1 christos if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
3112 1.1 christos h, rel))
3113 1.1 christos return FALSE;
3114 1.1 christos if (h != NULL)
3115 1.1 christos {
3116 1.9 christos ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3117 1.1 christos h->non_got_ref = TRUE;
3118 1.1 christos }
3119 1.1 christos break;
3120 1.1 christos
3121 1.3 christos /* Indirect .sdata2 relocation. */
3122 1.3 christos case R_PPC_EMB_SDA2I16:
3123 1.3 christos if (!bfd_link_executable (info))
3124 1.1 christos {
3125 1.1 christos bad_shared_reloc (abfd, r_type);
3126 1.1 christos return FALSE;
3127 1.1 christos }
3128 1.1 christos htab->sdata[1].sym->ref_regular = 1;
3129 1.1 christos if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
3130 1.1 christos h, rel))
3131 1.1 christos return FALSE;
3132 1.3 christos if (h != NULL)
3133 1.3 christos {
3134 1.7 christos ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3135 1.3 christos h->non_got_ref = TRUE;
3136 1.1 christos }
3137 1.1 christos break;
3138 1.1 christos
3139 1.1 christos case R_PPC_SDAREL16:
3140 1.1 christos htab->sdata[0].sym->ref_regular = 1;
3141 1.1 christos /* Fall through. */
3142 1.1 christos
3143 1.1 christos case R_PPC_VLE_SDAREL_LO16A:
3144 1.1 christos case R_PPC_VLE_SDAREL_LO16D:
3145 1.1 christos case R_PPC_VLE_SDAREL_HI16A:
3146 1.1 christos case R_PPC_VLE_SDAREL_HI16D:
3147 1.1 christos case R_PPC_VLE_SDAREL_HA16A:
3148 1.1 christos case R_PPC_VLE_SDAREL_HA16D:
3149 1.1 christos if (h != NULL)
3150 1.1 christos {
3151 1.1 christos ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3152 1.1 christos h->non_got_ref = TRUE;
3153 1.1 christos }
3154 1.1 christos break;
3155 1.1 christos
3156 1.1 christos case R_PPC_VLE_REL8:
3157 1.1 christos case R_PPC_VLE_REL15:
3158 1.7 christos case R_PPC_VLE_REL24:
3159 1.1 christos case R_PPC_VLE_LO16A:
3160 1.1 christos case R_PPC_VLE_LO16D:
3161 1.1 christos case R_PPC_VLE_HI16A:
3162 1.9 christos case R_PPC_VLE_HI16D:
3163 1.1 christos case R_PPC_VLE_HA16A:
3164 1.1 christos case R_PPC_VLE_HA16D:
3165 1.1 christos case R_PPC_VLE_ADDR20:
3166 1.1 christos break;
3167 1.3 christos
3168 1.1 christos case R_PPC_EMB_SDA2REL:
3169 1.1 christos if (!bfd_link_executable (info))
3170 1.1 christos {
3171 1.1 christos bad_shared_reloc (abfd, r_type);
3172 1.1 christos return FALSE;
3173 1.1 christos }
3174 1.1 christos htab->sdata[1].sym->ref_regular = 1;
3175 1.1 christos if (h != NULL)
3176 1.1 christos {
3177 1.1 christos ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3178 1.1 christos h->non_got_ref = TRUE;
3179 1.1 christos }
3180 1.1 christos break;
3181 1.1 christos
3182 1.1 christos case R_PPC_VLE_SDA21_LO:
3183 1.1 christos case R_PPC_VLE_SDA21:
3184 1.1 christos case R_PPC_EMB_SDA21:
3185 1.1 christos case R_PPC_EMB_RELSDA:
3186 1.1 christos if (h != NULL)
3187 1.1 christos {
3188 1.1 christos ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3189 1.1 christos h->non_got_ref = TRUE;
3190 1.1 christos }
3191 1.1 christos break;
3192 1.1 christos
3193 1.1 christos case R_PPC_EMB_NADDR32:
3194 1.1 christos case R_PPC_EMB_NADDR16:
3195 1.1 christos case R_PPC_EMB_NADDR16_LO:
3196 1.1 christos case R_PPC_EMB_NADDR16_HI:
3197 1.1 christos case R_PPC_EMB_NADDR16_HA:
3198 1.7 christos if (h != NULL)
3199 1.7 christos h->non_got_ref = TRUE;
3200 1.7 christos break;
3201 1.7 christos
3202 1.7 christos case R_PPC_PLTREL24:
3203 1.7 christos if (h == NULL)
3204 1.7 christos break;
3205 1.1 christos ppc_elf_tdata (abfd)->makes_plt_call = 1;
3206 1.1 christos goto pltentry;
3207 1.1 christos
3208 1.1 christos case R_PPC_PLTCALL:
3209 1.1 christos sec->has_pltcall = 1;
3210 1.7 christos /* Fall through. */
3211 1.1 christos
3212 1.1 christos case R_PPC_PLT32:
3213 1.1 christos case R_PPC_PLTREL32:
3214 1.3 christos case R_PPC_PLT16_LO:
3215 1.1 christos case R_PPC_PLT16_HI:
3216 1.1 christos case R_PPC_PLT16_HA:
3217 1.7 christos pltentry:
3218 1.7 christos #ifdef DEBUG
3219 1.7 christos fprintf (stderr, "Reloc requires a PLT entry\n");
3220 1.7 christos #endif
3221 1.7 christos /* This symbol requires a procedure linkage table entry. */
3222 1.7 christos if (h == NULL)
3223 1.1 christos {
3224 1.7 christos pltent = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3225 1.7 christos NON_GOT | PLT_KEEP);
3226 1.1 christos if (pltent == NULL)
3227 1.7 christos return FALSE;
3228 1.1 christos }
3229 1.7 christos else
3230 1.7 christos {
3231 1.7 christos if (r_type != R_PPC_PLTREL24)
3232 1.7 christos ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP;
3233 1.7 christos h->needs_plt = 1;
3234 1.7 christos pltent = &h->plt.plist;
3235 1.7 christos }
3236 1.7 christos addend = 0;
3237 1.7 christos if (bfd_link_pic (info)
3238 1.1 christos && (r_type == R_PPC_PLTREL24
3239 1.1 christos || r_type == R_PPC_PLT16_LO
3240 1.1 christos || r_type == R_PPC_PLT16_HI
3241 1.1 christos || r_type == R_PPC_PLT16_HA))
3242 1.1 christos addend = rel->r_addend;
3243 1.1 christos if (!update_plt_info (abfd, pltent, got2, addend))
3244 1.1 christos return FALSE;
3245 1.1 christos break;
3246 1.1 christos
3247 1.1 christos /* The following relocations don't need to propagate the
3248 1.1 christos relocation if linking a shared object since they are
3249 1.1 christos section relative. */
3250 1.1 christos case R_PPC_SECTOFF:
3251 1.1 christos case R_PPC_SECTOFF_LO:
3252 1.1 christos case R_PPC_SECTOFF_HI:
3253 1.1 christos case R_PPC_SECTOFF_HA:
3254 1.1 christos case R_PPC_DTPREL16:
3255 1.1 christos case R_PPC_DTPREL16_LO:
3256 1.1 christos case R_PPC_DTPREL16_HI:
3257 1.1 christos case R_PPC_DTPREL16_HA:
3258 1.3 christos case R_PPC_TOC16:
3259 1.1 christos break;
3260 1.1 christos
3261 1.1 christos case R_PPC_REL16:
3262 1.1 christos case R_PPC_REL16_LO:
3263 1.1 christos case R_PPC_REL16_HI:
3264 1.1 christos case R_PPC_REL16_HA:
3265 1.1 christos case R_PPC_REL16DX_HA:
3266 1.1 christos ppc_elf_tdata (abfd)->has_rel16 = 1;
3267 1.1 christos break;
3268 1.1 christos
3269 1.1 christos /* These are just markers. */
3270 1.7 christos case R_PPC_TLS:
3271 1.1 christos case R_PPC_EMB_MRKREF:
3272 1.1 christos case R_PPC_NONE:
3273 1.1 christos case R_PPC_max:
3274 1.1 christos case R_PPC_RELAX:
3275 1.1 christos case R_PPC_RELAX_PLT:
3276 1.1 christos case R_PPC_RELAX_PLTREL24:
3277 1.1 christos case R_PPC_16DX_HA:
3278 1.1 christos break;
3279 1.1 christos
3280 1.1 christos /* These should only appear in dynamic objects. */
3281 1.1 christos case R_PPC_COPY:
3282 1.1 christos case R_PPC_GLOB_DAT:
3283 1.1 christos case R_PPC_JMP_SLOT:
3284 1.1 christos case R_PPC_RELATIVE:
3285 1.1 christos case R_PPC_IRELATIVE:
3286 1.1 christos break;
3287 1.1 christos
3288 1.1 christos /* These aren't handled yet. We'll report an error later. */
3289 1.1 christos case R_PPC_ADDR30:
3290 1.1 christos case R_PPC_EMB_RELSEC16:
3291 1.1 christos case R_PPC_EMB_RELST_LO:
3292 1.1 christos case R_PPC_EMB_RELST_HI:
3293 1.1 christos case R_PPC_EMB_RELST_HA:
3294 1.1 christos case R_PPC_EMB_BIT_FLD:
3295 1.1 christos break;
3296 1.1 christos
3297 1.3 christos /* This refers only to functions defined in the shared library. */
3298 1.3 christos case R_PPC_LOCAL24PC:
3299 1.3 christos if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3300 1.3 christos {
3301 1.3 christos htab->plt_type = PLT_OLD;
3302 1.3 christos htab->old_bfd = abfd;
3303 1.1 christos }
3304 1.1 christos if (h != NULL && h->type == STT_GNU_IFUNC)
3305 1.1 christos {
3306 1.1 christos h->needs_plt = 1;
3307 1.1 christos if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3308 1.1 christos return FALSE;
3309 1.1 christos }
3310 1.1 christos break;
3311 1.1 christos
3312 1.1 christos /* This relocation describes the C++ object vtable hierarchy.
3313 1.1 christos Reconstruct it for later use during GC. */
3314 1.1 christos case R_PPC_GNU_VTINHERIT:
3315 1.9 christos if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3316 1.1 christos return FALSE;
3317 1.1 christos break;
3318 1.1 christos
3319 1.7 christos /* This relocation describes which C++ vtable entries are actually
3320 1.1 christos used. Record for later use during GC. */
3321 1.1 christos case R_PPC_GNU_VTENTRY:
3322 1.1 christos if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3323 1.1 christos return FALSE;
3324 1.1 christos break;
3325 1.7 christos
3326 1.1 christos /* We shouldn't really be seeing TPREL32. */
3327 1.1 christos case R_PPC_TPREL32:
3328 1.1 christos case R_PPC_TPREL16:
3329 1.1 christos case R_PPC_TPREL16_LO:
3330 1.1 christos case R_PPC_TPREL16_HI:
3331 1.1 christos case R_PPC_TPREL16_HA:
3332 1.1 christos if (bfd_link_dll (info))
3333 1.1 christos info->flags |= DF_STATIC_TLS;
3334 1.1 christos goto dodyn;
3335 1.1 christos
3336 1.1 christos /* Nor these. */
3337 1.1 christos case R_PPC_DTPMOD32:
3338 1.3 christos case R_PPC_DTPREL32:
3339 1.1 christos goto dodyn;
3340 1.1 christos
3341 1.1 christos case R_PPC_REL32:
3342 1.1 christos if (h == NULL
3343 1.1 christos && got2 != NULL
3344 1.1 christos && (sec->flags & SEC_CODE) != 0
3345 1.1 christos && bfd_link_pic (info)
3346 1.1 christos && htab->plt_type == PLT_UNSET)
3347 1.1 christos {
3348 1.1 christos /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3349 1.1 christos the start of a function, which assembles to a REL32
3350 1.1 christos reference to .got2. If we detect one of these, then
3351 1.1 christos force the old PLT layout because the linker cannot
3352 1.1 christos reliably deduce the GOT pointer value needed for
3353 1.1 christos PLT call stubs. */
3354 1.1 christos asection *s;
3355 1.1 christos Elf_Internal_Sym *isym;
3356 1.1 christos
3357 1.1 christos isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3358 1.1 christos abfd, r_symndx);
3359 1.1 christos if (isym == NULL)
3360 1.1 christos return FALSE;
3361 1.1 christos
3362 1.1 christos s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3363 1.1 christos if (s == got2)
3364 1.1 christos {
3365 1.1 christos htab->plt_type = PLT_OLD;
3366 1.1 christos htab->old_bfd = abfd;
3367 1.1 christos }
3368 1.1 christos }
3369 1.1 christos if (h == NULL || h == htab->elf.hgot)
3370 1.1 christos break;
3371 1.1 christos /* fall through */
3372 1.1 christos
3373 1.3 christos case R_PPC_ADDR32:
3374 1.1 christos case R_PPC_ADDR16:
3375 1.1 christos case R_PPC_ADDR16_LO:
3376 1.1 christos case R_PPC_ADDR16_HI:
3377 1.1 christos case R_PPC_ADDR16_HA:
3378 1.1 christos case R_PPC_UADDR32:
3379 1.1 christos case R_PPC_UADDR16:
3380 1.1 christos if (h != NULL && !bfd_link_pic (info))
3381 1.1 christos {
3382 1.1 christos /* We may need a plt entry if the symbol turns out to be
3383 1.3 christos a function defined in a dynamic object. */
3384 1.3 christos if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3385 1.3 christos return FALSE;
3386 1.3 christos
3387 1.1 christos /* We may need a copy reloc too. */
3388 1.1 christos h->non_got_ref = 1;
3389 1.1 christos h->pointer_equality_needed = 1;
3390 1.1 christos if (r_type == R_PPC_ADDR16_HA)
3391 1.1 christos ppc_elf_hash_entry (h)->has_addr16_ha = 1;
3392 1.1 christos if (r_type == R_PPC_ADDR16_LO)
3393 1.1 christos ppc_elf_hash_entry (h)->has_addr16_lo = 1;
3394 1.1 christos }
3395 1.1 christos goto dodyn;
3396 1.1 christos
3397 1.1 christos case R_PPC_REL24:
3398 1.1 christos case R_PPC_REL14:
3399 1.1 christos case R_PPC_REL14_BRTAKEN:
3400 1.1 christos case R_PPC_REL14_BRNTAKEN:
3401 1.1 christos if (h == NULL)
3402 1.1 christos break;
3403 1.1 christos if (h == htab->elf.hgot)
3404 1.1 christos {
3405 1.1 christos if (htab->plt_type == PLT_UNSET)
3406 1.1 christos {
3407 1.1 christos htab->plt_type = PLT_OLD;
3408 1.1 christos htab->old_bfd = abfd;
3409 1.1 christos }
3410 1.1 christos break;
3411 1.3 christos }
3412 1.1 christos /* fall through */
3413 1.1 christos
3414 1.1 christos case R_PPC_ADDR24:
3415 1.1 christos case R_PPC_ADDR14:
3416 1.1 christos case R_PPC_ADDR14_BRTAKEN:
3417 1.1 christos case R_PPC_ADDR14_BRNTAKEN:
3418 1.1 christos if (h != NULL && !bfd_link_pic (info))
3419 1.1 christos {
3420 1.1 christos /* We may need a plt entry if the symbol turns out to be
3421 1.1 christos a function defined in a dynamic object. */
3422 1.1 christos h->needs_plt = 1;
3423 1.1 christos if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3424 1.1 christos return FALSE;
3425 1.1 christos break;
3426 1.1 christos }
3427 1.1 christos
3428 1.1 christos dodyn:
3429 1.1 christos /* If we are creating a shared library, and this is a reloc
3430 1.1 christos against a global symbol, or a non PC relative reloc
3431 1.1 christos against a local symbol, then we need to copy the reloc
3432 1.1 christos into the shared library. However, if we are linking with
3433 1.1 christos -Bsymbolic, we do not need to copy a reloc against a
3434 1.1 christos global symbol which is defined in an object we are
3435 1.1 christos including in the link (i.e., DEF_REGULAR is set). At
3436 1.1 christos this point we have not seen all the input files, so it is
3437 1.1 christos possible that DEF_REGULAR is not set now but will be set
3438 1.1 christos later (it is never cleared). In case of a weak definition,
3439 1.1 christos DEF_REGULAR may be cleared later by a strong definition in
3440 1.1 christos a shared library. We account for that possibility below by
3441 1.1 christos storing information in the dyn_relocs field of the hash
3442 1.1 christos table entry. A similar situation occurs when creating
3443 1.3 christos shared libraries and symbol visibility changes render the
3444 1.1 christos symbol local.
3445 1.1 christos
3446 1.3 christos If on the other hand, we are creating an executable, we
3447 1.1 christos may need to keep relocations for symbols satisfied by a
3448 1.1 christos dynamic library if we manage to avoid copy relocs for the
3449 1.1 christos symbol. */
3450 1.3 christos if ((bfd_link_pic (info)
3451 1.1 christos && (must_be_dyn_reloc (info, r_type)
3452 1.1 christos || (h != NULL
3453 1.1 christos && (!SYMBOLIC_BIND (info, h)
3454 1.1 christos || h->root.type == bfd_link_hash_defweak
3455 1.1 christos || !h->def_regular))))
3456 1.1 christos || (ELIMINATE_COPY_RELOCS
3457 1.1 christos && !bfd_link_pic (info)
3458 1.1 christos && h != NULL
3459 1.1 christos && (h->root.type == bfd_link_hash_defweak
3460 1.1 christos || !h->def_regular)))
3461 1.1 christos {
3462 1.1 christos #ifdef DEBUG
3463 1.1 christos fprintf (stderr,
3464 1.1 christos "ppc_elf_check_relocs needs to "
3465 1.1 christos "create relocation for %s\n",
3466 1.1 christos (h && h->root.root.string
3467 1.1 christos ? h->root.root.string : "<unknown>"));
3468 1.1 christos #endif
3469 1.1 christos if (sreloc == NULL)
3470 1.1 christos {
3471 1.1 christos if (htab->elf.dynobj == NULL)
3472 1.1 christos htab->elf.dynobj = abfd;
3473 1.1 christos
3474 1.1 christos sreloc = _bfd_elf_make_dynamic_reloc_section
3475 1.1 christos (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3476 1.1 christos
3477 1.1 christos if (sreloc == NULL)
3478 1.3 christos return FALSE;
3479 1.3 christos }
3480 1.3 christos
3481 1.1 christos /* If this is a global symbol, we count the number of
3482 1.3 christos relocations we need for this symbol. */
3483 1.3 christos if (h != NULL)
3484 1.3 christos {
3485 1.3 christos struct elf_dyn_relocs *p;
3486 1.3 christos struct elf_dyn_relocs **rel_head;
3487 1.3 christos
3488 1.3 christos rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
3489 1.3 christos p = *rel_head;
3490 1.3 christos if (p == NULL || p->sec != sec)
3491 1.3 christos {
3492 1.3 christos p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3493 1.3 christos if (p == NULL)
3494 1.3 christos return FALSE;
3495 1.3 christos p->next = *rel_head;
3496 1.3 christos *rel_head = p;
3497 1.1 christos p->sec = sec;
3498 1.1 christos p->count = 0;
3499 1.1 christos p->pc_count = 0;
3500 1.1 christos }
3501 1.1 christos p->count += 1;
3502 1.1 christos if (!must_be_dyn_reloc (info, r_type))
3503 1.3 christos p->pc_count += 1;
3504 1.3 christos }
3505 1.3 christos else
3506 1.1 christos {
3507 1.1 christos /* Track dynamic relocs needed for local syms too.
3508 1.1 christos We really need local syms available to do this
3509 1.1 christos easily. Oh well. */
3510 1.1 christos struct ppc_dyn_relocs *p;
3511 1.1 christos struct ppc_dyn_relocs **rel_head;
3512 1.1 christos bfd_boolean is_ifunc;
3513 1.1 christos asection *s;
3514 1.1 christos void *vpp;
3515 1.1 christos Elf_Internal_Sym *isym;
3516 1.1 christos
3517 1.1 christos isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3518 1.1 christos abfd, r_symndx);
3519 1.1 christos if (isym == NULL)
3520 1.3 christos return FALSE;
3521 1.3 christos
3522 1.3 christos s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3523 1.3 christos if (s == NULL)
3524 1.3 christos s = sec;
3525 1.3 christos
3526 1.3 christos vpp = &elf_section_data (s)->local_dynrel;
3527 1.3 christos rel_head = (struct ppc_dyn_relocs **) vpp;
3528 1.3 christos is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
3529 1.3 christos p = *rel_head;
3530 1.3 christos if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
3531 1.3 christos p = p->next;
3532 1.3 christos if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
3533 1.3 christos {
3534 1.3 christos p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3535 1.3 christos if (p == NULL)
3536 1.3 christos return FALSE;
3537 1.1 christos p->next = *rel_head;
3538 1.1 christos *rel_head = p;
3539 1.1 christos p->sec = sec;
3540 1.1 christos p->ifunc = is_ifunc;
3541 1.1 christos p->count = 0;
3542 1.1 christos }
3543 1.1 christos p->count += 1;
3544 1.1 christos }
3545 1.1 christos }
3546 1.1 christos
3547 1.7 christos break;
3548 1.7 christos }
3549 1.7 christos }
3550 1.7 christos
3551 1.1 christos return TRUE;
3552 1.7 christos }
3553 1.1 christos
3554 1.1 christos /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
3556 1.1 christos and OBFD, and merge non-conflicting ones. */
3557 1.1 christos bfd_boolean
3558 1.1 christos _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
3559 1.1 christos {
3560 1.1 christos bfd *obfd = info->output_bfd;
3561 1.1 christos obj_attribute *in_attr, *in_attrs;
3562 1.7 christos obj_attribute *out_attr, *out_attrs;
3563 1.1 christos bfd_boolean ret = TRUE;
3564 1.1 christos
3565 1.7 christos in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3566 1.7 christos out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3567 1.7 christos
3568 1.7 christos in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3569 1.7 christos out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3570 1.7 christos
3571 1.7 christos if (in_attr->i != out_attr->i)
3572 1.7 christos {
3573 1.7 christos int in_fp = in_attr->i & 3;
3574 1.7 christos int out_fp = out_attr->i & 3;
3575 1.7 christos static bfd *last_fp, *last_ld;
3576 1.7 christos
3577 1.7 christos if (in_fp == 0)
3578 1.7 christos ;
3579 1.7 christos else if (out_fp == 0)
3580 1.7 christos {
3581 1.7 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3582 1.7 christos out_attr->i ^= in_fp;
3583 1.7 christos last_fp = ibfd;
3584 1.7 christos }
3585 1.7 christos else if (out_fp != 2 && in_fp == 2)
3586 1.7 christos {
3587 1.7 christos _bfd_error_handler
3588 1.7 christos /* xgettext:c-format */
3589 1.7 christos (_("%pB uses hard float, %pB uses soft float"),
3590 1.7 christos last_fp, ibfd);
3591 1.7 christos ret = FALSE;
3592 1.7 christos }
3593 1.7 christos else if (out_fp == 2 && in_fp != 2)
3594 1.7 christos {
3595 1.7 christos _bfd_error_handler
3596 1.7 christos /* xgettext:c-format */
3597 1.7 christos (_("%pB uses hard float, %pB uses soft float"),
3598 1.7 christos ibfd, last_fp);
3599 1.7 christos ret = FALSE;
3600 1.7 christos }
3601 1.7 christos else if (out_fp == 1 && in_fp == 3)
3602 1.7 christos {
3603 1.7 christos _bfd_error_handler
3604 1.7 christos /* xgettext:c-format */
3605 1.7 christos (_("%pB uses double-precision hard float, "
3606 1.7 christos "%pB uses single-precision hard float"), last_fp, ibfd);
3607 1.7 christos ret = FALSE;
3608 1.7 christos }
3609 1.7 christos else if (out_fp == 3 && in_fp == 1)
3610 1.7 christos {
3611 1.7 christos _bfd_error_handler
3612 1.7 christos /* xgettext:c-format */
3613 1.1 christos (_("%pB uses double-precision hard float, "
3614 1.7 christos "%pB uses single-precision hard float"), ibfd, last_fp);
3615 1.7 christos ret = FALSE;
3616 1.7 christos }
3617 1.7 christos
3618 1.7 christos in_fp = in_attr->i & 0xc;
3619 1.7 christos out_fp = out_attr->i & 0xc;
3620 1.7 christos if (in_fp == 0)
3621 1.7 christos ;
3622 1.7 christos else if (out_fp == 0)
3623 1.7 christos {
3624 1.7 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3625 1.7 christos out_attr->i ^= in_fp;
3626 1.7 christos last_ld = ibfd;
3627 1.7 christos }
3628 1.7 christos else if (out_fp != 2 * 4 && in_fp == 2 * 4)
3629 1.7 christos {
3630 1.7 christos _bfd_error_handler
3631 1.7 christos /* xgettext:c-format */
3632 1.7 christos (_("%pB uses 64-bit long double, "
3633 1.7 christos "%pB uses 128-bit long double"), ibfd, last_ld);
3634 1.7 christos ret = FALSE;
3635 1.7 christos }
3636 1.7 christos else if (in_fp != 2 * 4 && out_fp == 2 * 4)
3637 1.7 christos {
3638 1.7 christos _bfd_error_handler
3639 1.7 christos /* xgettext:c-format */
3640 1.7 christos (_("%pB uses 64-bit long double, "
3641 1.7 christos "%pB uses 128-bit long double"), last_ld, ibfd);
3642 1.7 christos ret = FALSE;
3643 1.7 christos }
3644 1.7 christos else if (out_fp == 1 * 4 && in_fp == 3 * 4)
3645 1.7 christos {
3646 1.7 christos _bfd_error_handler
3647 1.7 christos /* xgettext:c-format */
3648 1.7 christos (_("%pB uses IBM long double, "
3649 1.7 christos "%pB uses IEEE long double"), last_ld, ibfd);
3650 1.7 christos ret = FALSE;
3651 1.7 christos }
3652 1.7 christos else if (out_fp == 3 * 4 && in_fp == 1 * 4)
3653 1.7 christos {
3654 1.7 christos _bfd_error_handler
3655 1.7 christos /* xgettext:c-format */
3656 1.7 christos (_("%pB uses IBM long double, "
3657 1.7 christos "%pB uses IEEE long double"), ibfd, last_ld);
3658 1.1 christos ret = FALSE;
3659 1.7 christos }
3660 1.7 christos }
3661 1.7 christos
3662 1.7 christos if (!ret)
3663 1.7 christos {
3664 1.7 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3665 1.7 christos bfd_set_error (bfd_error_bad_value);
3666 1.7 christos }
3667 1.7 christos return ret;
3668 1.7 christos }
3669 1.7 christos
3670 1.7 christos /* Merge object attributes from IBFD into OBFD. Warn if
3671 1.7 christos there are conflicting attributes. */
3672 1.7 christos static bfd_boolean
3673 1.7 christos ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
3674 1.7 christos {
3675 1.7 christos bfd *obfd;
3676 1.7 christos obj_attribute *in_attr, *in_attrs;
3677 1.7 christos obj_attribute *out_attr, *out_attrs;
3678 1.1 christos bfd_boolean ret;
3679 1.1 christos
3680 1.1 christos if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info))
3681 1.1 christos return FALSE;
3682 1.1 christos
3683 1.7 christos obfd = info->output_bfd;
3684 1.1 christos in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3685 1.1 christos out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3686 1.7 christos
3687 1.7 christos /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3688 1.7 christos merge non-conflicting ones. */
3689 1.1 christos in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3690 1.7 christos out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3691 1.7 christos ret = TRUE;
3692 1.7 christos if (in_attr->i != out_attr->i)
3693 1.1 christos {
3694 1.7 christos int in_vec = in_attr->i & 3;
3695 1.7 christos int out_vec = out_attr->i & 3;
3696 1.7 christos static bfd *last_vec;
3697 1.1 christos
3698 1.1 christos if (in_vec == 0)
3699 1.1 christos ;
3700 1.1 christos else if (out_vec == 0)
3701 1.1 christos {
3702 1.1 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3703 1.7 christos out_attr->i = in_vec;
3704 1.1 christos last_vec = ibfd;
3705 1.7 christos }
3706 1.7 christos /* For now, allow generic to transition to AltiVec or SPE
3707 1.7 christos without a warning. If GCC marked files with their stack
3708 1.7 christos alignment and used don't-care markings for files which are
3709 1.7 christos not affected by the vector ABI, we could warn about this
3710 1.7 christos case too. */
3711 1.7 christos else if (in_vec == 1)
3712 1.7 christos ;
3713 1.7 christos else if (out_vec == 1)
3714 1.7 christos {
3715 1.7 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3716 1.7 christos out_attr->i = in_vec;
3717 1.7 christos last_vec = ibfd;
3718 1.7 christos }
3719 1.7 christos else if (out_vec < in_vec)
3720 1.7 christos {
3721 1.7 christos _bfd_error_handler
3722 1.7 christos /* xgettext:c-format */
3723 1.7 christos (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
3724 1.7 christos last_vec, ibfd);
3725 1.7 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3726 1.7 christos ret = FALSE;
3727 1.7 christos }
3728 1.7 christos else if (out_vec > in_vec)
3729 1.1 christos {
3730 1.1 christos _bfd_error_handler
3731 1.1 christos /* xgettext:c-format */
3732 1.1 christos (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
3733 1.1 christos ibfd, last_vec);
3734 1.1 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3735 1.1 christos ret = FALSE;
3736 1.1 christos }
3737 1.7 christos }
3738 1.7 christos
3739 1.7 christos /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
3740 1.7 christos and merge non-conflicting ones. */
3741 1.7 christos in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
3742 1.1 christos out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
3743 1.7 christos if (in_attr->i != out_attr->i)
3744 1.7 christos {
3745 1.7 christos int in_struct = in_attr->i & 3;
3746 1.7 christos int out_struct = out_attr->i & 3;
3747 1.7 christos static bfd *last_struct;
3748 1.7 christos
3749 1.7 christos if (in_struct == 0 || in_struct == 3)
3750 1.7 christos ;
3751 1.7 christos else if (out_struct == 0)
3752 1.7 christos {
3753 1.7 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3754 1.7 christos out_attr->i = in_struct;
3755 1.7 christos last_struct = ibfd;
3756 1.7 christos }
3757 1.7 christos else if (out_struct < in_struct)
3758 1.7 christos {
3759 1.7 christos _bfd_error_handler
3760 1.7 christos /* xgettext:c-format */
3761 1.7 christos (_("%pB uses r3/r4 for small structure returns, "
3762 1.7 christos "%pB uses memory"), last_struct, ibfd);
3763 1.7 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3764 1.7 christos ret = FALSE;
3765 1.7 christos }
3766 1.7 christos else if (out_struct > in_struct)
3767 1.7 christos {
3768 1.7 christos _bfd_error_handler
3769 1.7 christos /* xgettext:c-format */
3770 1.7 christos (_("%pB uses r3/r4 for small structure returns, "
3771 1.7 christos "%pB uses memory"), ibfd, last_struct);
3772 1.1 christos out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3773 1.1 christos ret = FALSE;
3774 1.1 christos }
3775 1.7 christos }
3776 1.1 christos if (!ret)
3777 1.1 christos {
3778 1.1 christos bfd_set_error (bfd_error_bad_value);
3779 1.1 christos return FALSE;
3780 1.1 christos }
3781 1.1 christos
3782 1.7 christos /* Merge Tag_compatibility attributes and any common GNU ones. */
3783 1.1 christos return _bfd_elf_merge_object_attributes (ibfd, info);
3784 1.7 christos }
3785 1.1 christos
3786 1.1 christos /* Merge backend specific data from an object file to the output
3787 1.1 christos object file when linking. */
3788 1.1 christos
3789 1.1 christos static bfd_boolean
3790 1.1 christos ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3791 1.1 christos {
3792 1.1 christos bfd *obfd = info->output_bfd;
3793 1.7 christos flagword old_flags;
3794 1.1 christos flagword new_flags;
3795 1.1 christos bfd_boolean error;
3796 1.7 christos
3797 1.1 christos if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3798 1.1 christos return TRUE;
3799 1.1 christos
3800 1.1 christos /* Check if we have the same endianness. */
3801 1.1 christos if (! _bfd_generic_verify_endian_match (ibfd, info))
3802 1.1 christos return FALSE;
3803 1.1 christos
3804 1.1 christos if (!ppc_elf_merge_obj_attributes (ibfd, info))
3805 1.1 christos return FALSE;
3806 1.1 christos
3807 1.1 christos new_flags = elf_elfheader (ibfd)->e_flags;
3808 1.1 christos old_flags = elf_elfheader (obfd)->e_flags;
3809 1.1 christos if (!elf_flags_init (obfd))
3810 1.1 christos {
3811 1.1 christos /* First call, no flags set. */
3812 1.1 christos elf_flags_init (obfd) = TRUE;
3813 1.1 christos elf_elfheader (obfd)->e_flags = new_flags;
3814 1.1 christos }
3815 1.1 christos
3816 1.1 christos /* Compatible flags are ok. */
3817 1.1 christos else if (new_flags == old_flags)
3818 1.1 christos ;
3819 1.1 christos
3820 1.1 christos /* Incompatible flags. */
3821 1.1 christos else
3822 1.7 christos {
3823 1.7 christos /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3824 1.1 christos to be linked with either. */
3825 1.1 christos error = FALSE;
3826 1.1 christos if ((new_flags & EF_PPC_RELOCATABLE) != 0
3827 1.1 christos && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3828 1.1 christos {
3829 1.1 christos error = TRUE;
3830 1.7 christos _bfd_error_handler
3831 1.7 christos (_("%pB: compiled with -mrelocatable and linked with "
3832 1.1 christos "modules compiled normally"), ibfd);
3833 1.1 christos }
3834 1.1 christos else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3835 1.1 christos && (old_flags & EF_PPC_RELOCATABLE) != 0)
3836 1.1 christos {
3837 1.1 christos error = TRUE;
3838 1.1 christos _bfd_error_handler
3839 1.1 christos (_("%pB: compiled normally and linked with "
3840 1.1 christos "modules compiled with -mrelocatable"), ibfd);
3841 1.1 christos }
3842 1.1 christos
3843 1.1 christos /* The output is -mrelocatable-lib iff both the input files are. */
3844 1.1 christos if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3845 1.1 christos elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3846 1.1 christos
3847 1.1 christos /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3848 1.1 christos but each input file is either -mrelocatable or -mrelocatable-lib. */
3849 1.1 christos if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3850 1.1 christos && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3851 1.1 christos && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3852 1.1 christos elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3853 1.1 christos
3854 1.1 christos /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3855 1.1 christos any module uses it. */
3856 1.1 christos elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3857 1.7 christos
3858 1.7 christos new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3859 1.7 christos old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3860 1.7 christos
3861 1.7 christos /* Warn about any other mismatches. */
3862 1.1 christos if (new_flags != old_flags)
3863 1.1 christos {
3864 1.1 christos error = TRUE;
3865 1.1 christos _bfd_error_handler
3866 1.1 christos /* xgettext:c-format */
3867 1.1 christos (_("%pB: uses different e_flags (%#x) fields "
3868 1.1 christos "than previous modules (%#x)"),
3869 1.1 christos ibfd, new_flags, old_flags);
3870 1.1 christos }
3871 1.1 christos
3872 1.1 christos if (error)
3873 1.1 christos {
3874 1.1 christos bfd_set_error (bfd_error_bad_value);
3875 1.7 christos return FALSE;
3876 1.7 christos }
3877 1.7 christos }
3878 1.7 christos
3879 1.3 christos return TRUE;
3880 1.7 christos }
3881 1.7 christos
3882 1.7 christos static void
3883 1.9 christos ppc_elf_vle_split16 (bfd *input_bfd,
3884 1.7 christos asection *input_section,
3885 1.7 christos unsigned long offset,
3886 1.9 christos bfd_byte *loc,
3887 1.7 christos bfd_vma value,
3888 1.7 christos split16_format_type split16_format,
3889 1.7 christos bfd_boolean fixup)
3890 1.7 christos {
3891 1.7 christos unsigned int insn, opcode;
3892 1.7 christos
3893 1.7 christos insn = bfd_get_32 (input_bfd, loc);
3894 1.7 christos opcode = insn & E_OPCODE_MASK;
3895 1.7 christos if (opcode == E_OR2I_INSN
3896 1.7 christos || opcode == E_AND2I_DOT_INSN
3897 1.7 christos || opcode == E_OR2IS_INSN
3898 1.7 christos || opcode == E_LIS_INSN
3899 1.7 christos || opcode == E_AND2IS_DOT_INSN)
3900 1.7 christos {
3901 1.7 christos if (split16_format != split16a_type)
3902 1.7 christos {
3903 1.7 christos if (fixup)
3904 1.7 christos split16_format = split16a_type;
3905 1.7 christos else
3906 1.7 christos _bfd_error_handler
3907 1.7 christos /* xgettext:c-format */
3908 1.7 christos (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"),
3909 1.7 christos input_bfd, input_section, offset, opcode);
3910 1.7 christos }
3911 1.7 christos }
3912 1.7 christos else if (opcode == E_ADD2I_DOT_INSN
3913 1.7 christos || opcode == E_ADD2IS_INSN
3914 1.7 christos || opcode == E_CMP16I_INSN
3915 1.7 christos || opcode == E_MULL2I_INSN
3916 1.7 christos || opcode == E_CMPL16I_INSN
3917 1.7 christos || opcode == E_CMPH16I_INSN
3918 1.7 christos || opcode == E_CMPHL16I_INSN)
3919 1.7 christos {
3920 1.7 christos if (split16_format != split16d_type)
3921 1.7 christos {
3922 1.7 christos if (fixup)
3923 1.9 christos split16_format = split16d_type;
3924 1.9 christos else
3925 1.9 christos _bfd_error_handler
3926 1.9 christos /* xgettext:c-format */
3927 1.9 christos (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"),
3928 1.9 christos input_bfd, input_section, offset, opcode);
3929 1.9 christos }
3930 1.9 christos }
3931 1.9 christos if (split16_format == split16a_type)
3932 1.9 christos {
3933 1.9 christos insn &= ~((0xf800 << 5) | 0x7ff);
3934 1.9 christos insn |= (value & 0xf800) << 5;
3935 1.9 christos if ((insn & E_LI_MASK) == E_LI_INSN)
3936 1.9 christos {
3937 1.9 christos /* Hack for e_li. Extend sign. */
3938 1.9 christos insn &= ~(0xf0000 >> 5);
3939 1.7 christos insn |= (-(value & 0x8000) & 0xf0000) >> 5;
3940 1.7 christos }
3941 1.7 christos }
3942 1.1 christos else
3943 1.7 christos {
3944 1.7 christos insn &= ~((0xf800 << 10) | 0x7ff);
3945 1.1 christos insn |= (value & 0xf800) << 10;
3946 1.7 christos }
3947 1.1 christos insn |= value & 0x7ff;
3948 1.3 christos bfd_put_32 (input_bfd, insn, loc);
3949 1.7 christos }
3950 1.7 christos
3951 1.7 christos static void
3952 1.7 christos ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
3953 1.7 christos {
3954 1.7 christos unsigned int insn;
3955 1.3 christos
3956 1.3 christos insn = bfd_get_32 (output_bfd, loc);
3957 1.1 christos /* We have an li20 field, bits 17..20, 11..15, 21..31. */
3958 1.1 christos /* Top 4 bits of value to 17..20. */
3959 1.1 christos insn |= (value & 0xf0000) >> 5;
3960 1.1 christos /* Next 5 bits of the value to 11..15. */
3961 1.1 christos insn |= (value & 0xf800) << 5;
3962 1.1 christos /* And the final 11 bits of the value to bits 21 to 31. */
3963 1.1 christos insn |= value & 0x7ff;
3964 1.3 christos bfd_put_32 (output_bfd, insn, loc);
3965 1.1 christos }
3966 1.1 christos
3967 1.1 christos
3968 1.1 christos /* Choose which PLT scheme to use, and set .plt flags appropriately.
3970 1.1 christos Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3971 1.1 christos int
3972 1.1 christos ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3973 1.1 christos struct bfd_link_info *info)
3974 1.1 christos {
3975 1.3 christos struct ppc_elf_link_hash_table *htab;
3976 1.1 christos flagword flags;
3977 1.3 christos
3978 1.1 christos htab = ppc_elf_hash_table (info);
3979 1.1 christos
3980 1.1 christos if (htab->plt_type == PLT_UNSET)
3981 1.1 christos {
3982 1.1 christos struct elf_link_hash_entry *h;
3983 1.1 christos
3984 1.1 christos if (htab->params->plt_style == PLT_OLD)
3985 1.7 christos htab->plt_type = PLT_OLD;
3986 1.1 christos else if (bfd_link_pic (info)
3987 1.1 christos && htab->elf.dynamic_sections_created
3988 1.1 christos && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
3989 1.1 christos FALSE, FALSE, TRUE)) != NULL
3990 1.1 christos && (h->type == STT_FUNC
3991 1.1 christos || h->needs_plt)
3992 1.1 christos && h->ref_regular
3993 1.1 christos && !(SYMBOL_CALLS_LOCAL (info, h)
3994 1.1 christos || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
3995 1.1 christos {
3996 1.3 christos /* Profiling of shared libs (and pies) is not supported with
3997 1.1 christos secure plt, because ppc32 does profiling before a
3998 1.1 christos function prologue and a secure plt pic call stubs needs
3999 1.1 christos r30 to be set up. */
4000 1.1 christos htab->plt_type = PLT_OLD;
4001 1.1 christos }
4002 1.1 christos else
4003 1.1 christos {
4004 1.3 christos bfd *ibfd;
4005 1.1 christos enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4006 1.1 christos
4007 1.1 christos /* Look through the reloc flags left by ppc_elf_check_relocs.
4008 1.1 christos Use the old style bss plt if a file makes plt calls
4009 1.1 christos without using the new relocs, and if ld isn't given
4010 1.1 christos --secure-plt and we never see REL16 relocs. */
4011 1.1 christos if (plt_type == PLT_UNSET)
4012 1.1 christos plt_type = PLT_OLD;
4013 1.1 christos for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4014 1.1 christos if (is_ppc_elf (ibfd))
4015 1.1 christos {
4016 1.1 christos if (ppc_elf_tdata (ibfd)->has_rel16)
4017 1.1 christos plt_type = PLT_NEW;
4018 1.1 christos else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4019 1.3 christos {
4020 1.1 christos plt_type = PLT_OLD;
4021 1.1 christos htab->old_bfd = ibfd;
4022 1.7 christos break;
4023 1.1 christos }
4024 1.7 christos }
4025 1.1 christos htab->plt_type = plt_type;
4026 1.1 christos }
4027 1.1 christos }
4028 1.1 christos if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4029 1.1 christos {
4030 1.1 christos if (htab->old_bfd != NULL)
4031 1.1 christos _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd);
4032 1.1 christos else
4033 1.1 christos _bfd_error_handler (_("bss-plt forced by profiling"));
4034 1.1 christos }
4035 1.7 christos
4036 1.9 christos BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4037 1.1 christos
4038 1.1 christos if (htab->plt_type == PLT_NEW)
4039 1.1 christos {
4040 1.7 christos flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4041 1.9 christos | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4042 1.1 christos
4043 1.1 christos /* The new PLT is a loaded section. */
4044 1.1 christos if (htab->elf.splt != NULL
4045 1.1 christos && !bfd_set_section_flags (htab->elf.splt, flags))
4046 1.1 christos return -1;
4047 1.1 christos
4048 1.9 christos /* The new GOT is not executable. */
4049 1.1 christos if (htab->elf.sgot != NULL
4050 1.1 christos && !bfd_set_section_flags (htab->elf.sgot, flags))
4051 1.1 christos return -1;
4052 1.1 christos }
4053 1.1 christos else
4054 1.1 christos {
4055 1.1 christos /* Stop an unused .glink section from affecting .text alignment. */
4056 1.1 christos if (htab->glink != NULL
4057 1.1 christos && !bfd_set_section_alignment (htab->glink, 0))
4058 1.1 christos return -1;
4059 1.1 christos }
4060 1.1 christos return htab->plt_type == PLT_NEW;
4061 1.1 christos }
4062 1.1 christos
4063 1.1 christos /* Return the section that should be marked against GC for a given
4065 1.1 christos relocation. */
4066 1.1 christos
4067 1.1 christos static asection *
4068 1.1 christos ppc_elf_gc_mark_hook (asection *sec,
4069 1.1 christos struct bfd_link_info *info,
4070 1.1 christos Elf_Internal_Rela *rel,
4071 1.1 christos struct elf_link_hash_entry *h,
4072 1.1 christos Elf_Internal_Sym *sym)
4073 1.1 christos {
4074 1.1 christos if (h != NULL)
4075 1.1 christos switch (ELF32_R_TYPE (rel->r_info))
4076 1.7 christos {
4077 1.7 christos case R_PPC_GNU_VTINHERIT:
4078 1.7 christos case R_PPC_GNU_VTENTRY:
4079 1.7 christos return NULL;
4080 1.7 christos }
4081 1.7 christos
4082 1.7 christos return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4083 1.1 christos }
4084 1.7 christos
4085 1.1 christos static bfd_boolean
4086 1.7 christos get_sym_h (struct elf_link_hash_entry **hp,
4087 1.7 christos Elf_Internal_Sym **symp,
4088 1.7 christos asection **symsecp,
4089 1.7 christos unsigned char **tls_maskp,
4090 1.1 christos Elf_Internal_Sym **locsymsp,
4091 1.7 christos unsigned long r_symndx,
4092 1.7 christos bfd *ibfd)
4093 1.7 christos {
4094 1.7 christos Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4095 1.1 christos
4096 1.7 christos if (r_symndx >= symtab_hdr->sh_info)
4097 1.7 christos {
4098 1.1 christos struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4099 1.7 christos struct elf_link_hash_entry *h;
4100 1.7 christos
4101 1.1 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4102 1.7 christos while (h->root.type == bfd_link_hash_indirect
4103 1.1 christos || h->root.type == bfd_link_hash_warning)
4104 1.7 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
4105 1.7 christos
4106 1.7 christos if (hp != NULL)
4107 1.7 christos *hp = h;
4108 1.7 christos
4109 1.1 christos if (symp != NULL)
4110 1.1 christos *symp = NULL;
4111 1.7 christos
4112 1.7 christos if (symsecp != NULL)
4113 1.7 christos {
4114 1.7 christos asection *symsec = NULL;
4115 1.7 christos if (h->root.type == bfd_link_hash_defined
4116 1.7 christos || h->root.type == bfd_link_hash_defweak)
4117 1.7 christos symsec = h->root.u.def.section;
4118 1.1 christos *symsecp = symsec;
4119 1.7 christos }
4120 1.7 christos
4121 1.7 christos if (tls_maskp != NULL)
4122 1.7 christos *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask;
4123 1.7 christos }
4124 1.7 christos else
4125 1.7 christos {
4126 1.7 christos Elf_Internal_Sym *sym;
4127 1.7 christos Elf_Internal_Sym *locsyms = *locsymsp;
4128 1.7 christos
4129 1.1 christos if (locsyms == NULL)
4130 1.7 christos {
4131 1.1 christos locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4132 1.7 christos if (locsyms == NULL)
4133 1.7 christos locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4134 1.1 christos symtab_hdr->sh_info,
4135 1.7 christos 0, NULL, NULL, NULL);
4136 1.7 christos if (locsyms == NULL)
4137 1.1 christos return FALSE;
4138 1.7 christos *locsymsp = locsyms;
4139 1.7 christos }
4140 1.1 christos sym = locsyms + r_symndx;
4141 1.7 christos
4142 1.7 christos if (hp != NULL)
4143 1.7 christos *hp = NULL;
4144 1.7 christos
4145 1.1 christos if (symp != NULL)
4146 1.7 christos *symp = sym;
4147 1.7 christos
4148 1.7 christos if (symsecp != NULL)
4149 1.1 christos *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4150 1.7 christos
4151 1.7 christos if (tls_maskp != NULL)
4152 1.7 christos {
4153 1.7 christos bfd_signed_vma *local_got;
4154 1.7 christos unsigned char *tls_mask;
4155 1.1 christos
4156 1.7 christos tls_mask = NULL;
4157 1.1 christos local_got = elf_local_got_refcounts (ibfd);
4158 1.1 christos if (local_got != NULL)
4159 1.1 christos {
4160 1.1 christos struct plt_entry **local_plt = (struct plt_entry **)
4161 1.1 christos (local_got + symtab_hdr->sh_info);
4162 1.7 christos unsigned char *lgot_masks = (unsigned char *)
4163 1.7 christos (local_plt + symtab_hdr->sh_info);
4164 1.1 christos tls_mask = &lgot_masks[r_symndx];
4165 1.7 christos }
4166 1.7 christos *tls_maskp = tls_mask;
4167 1.1 christos }
4168 1.1 christos }
4169 1.7 christos return TRUE;
4170 1.7 christos }
4171 1.7 christos
4172 1.1 christos /* Analyze inline PLT call relocations to see whether calls to locally
4174 1.7 christos defined functions can be converted to direct calls. */
4175 1.7 christos
4176 1.7 christos bfd_boolean
4177 1.7 christos ppc_elf_inline_plt (struct bfd_link_info *info)
4178 1.7 christos {
4179 1.7 christos struct ppc_elf_link_hash_table *htab;
4180 1.7 christos bfd *ibfd;
4181 1.7 christos asection *sec;
4182 1.7 christos bfd_vma low_vma, high_vma, limit;
4183 1.7 christos
4184 1.7 christos htab = ppc_elf_hash_table (info);
4185 1.7 christos if (htab == NULL)
4186 1.7 christos return FALSE;
4187 1.7 christos
4188 1.7 christos /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
4189 1.7 christos reduced somewhat to cater for possible stubs that might be added
4190 1.7 christos between the call and its destination. */
4191 1.3 christos limit = 0x1e00000;
4192 1.7 christos low_vma = -1;
4193 1.7 christos high_vma = 0;
4194 1.7 christos for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
4195 1.7 christos if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
4196 1.7 christos {
4197 1.7 christos if (low_vma > sec->vma)
4198 1.7 christos low_vma = sec->vma;
4199 1.7 christos if (high_vma < sec->vma + sec->size)
4200 1.7 christos high_vma = sec->vma + sec->size;
4201 1.7 christos }
4202 1.7 christos
4203 1.7 christos /* If a "bl" can reach anywhere in local code sections, then we can
4204 1.7 christos convert all inline PLT sequences to direct calls when the symbol
4205 1.7 christos is local. */
4206 1.7 christos if (high_vma - low_vma < limit)
4207 1.7 christos {
4208 1.7 christos htab->can_convert_all_inline_plt = 1;
4209 1.7 christos return TRUE;
4210 1.7 christos }
4211 1.7 christos
4212 1.7 christos /* Otherwise, go looking through relocs for cases where a direct
4213 1.7 christos call won't reach. Mark the symbol on any such reloc to disable
4214 1.7 christos the optimization and keep the PLT entry as it seems likely that
4215 1.7 christos this will be better than creating trampolines. Note that this
4216 1.7 christos will disable the optimization for all inline PLT calls to a
4217 1.7 christos particular symbol, not just those that won't reach. The
4218 1.7 christos difficulty in doing a more precise optimization is that the
4219 1.7 christos linker needs to make a decision depending on whether a
4220 1.7 christos particular R_PPC_PLTCALL insn can be turned into a direct
4221 1.7 christos call, for each of the R_PPC_PLTSEQ and R_PPC_PLT16* insns in
4222 1.7 christos the sequence, and there is nothing that ties those relocs
4223 1.7 christos together except their symbol. */
4224 1.7 christos
4225 1.7 christos for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4226 1.7 christos {
4227 1.7 christos Elf_Internal_Shdr *symtab_hdr;
4228 1.7 christos Elf_Internal_Sym *local_syms;
4229 1.7 christos
4230 1.7 christos if (!is_ppc_elf (ibfd))
4231 1.7 christos continue;
4232 1.7 christos
4233 1.7 christos local_syms = NULL;
4234 1.7 christos symtab_hdr = &elf_symtab_hdr (ibfd);
4235 1.7 christos
4236 1.7 christos for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4237 1.7 christos if (sec->has_pltcall
4238 1.8 rin && !bfd_is_abs_section (sec->output_section))
4239 1.7 christos {
4240 1.7 christos Elf_Internal_Rela *relstart, *rel, *relend;
4241 1.7 christos
4242 1.7 christos /* Read the relocations. */
4243 1.7 christos relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4244 1.7 christos info->keep_memory);
4245 1.7 christos if (relstart == NULL)
4246 1.7 christos return FALSE;
4247 1.7 christos
4248 1.7 christos relend = relstart + sec->reloc_count;
4249 1.7 christos for (rel = relstart; rel < relend; rel++)
4250 1.7 christos {
4251 1.7 christos enum elf_ppc_reloc_type r_type;
4252 1.7 christos unsigned long r_symndx;
4253 1.7 christos asection *sym_sec;
4254 1.7 christos struct elf_link_hash_entry *h;
4255 1.7 christos Elf_Internal_Sym *sym;
4256 1.7 christos unsigned char *tls_maskp;
4257 1.7 christos
4258 1.7 christos r_type = ELF32_R_TYPE (rel->r_info);
4259 1.7 christos if (r_type != R_PPC_PLTCALL)
4260 1.7 christos continue;
4261 1.7 christos
4262 1.7 christos r_symndx = ELF32_R_SYM (rel->r_info);
4263 1.7 christos if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
4264 1.7 christos r_symndx, ibfd))
4265 1.7 christos {
4266 1.7 christos if (elf_section_data (sec)->relocs != relstart)
4267 1.7 christos free (relstart);
4268 1.7 christos if (local_syms != NULL
4269 1.7 christos && symtab_hdr->contents != (unsigned char *) local_syms)
4270 1.7 christos free (local_syms);
4271 1.7 christos return FALSE;
4272 1.7 christos }
4273 1.7 christos
4274 1.7 christos if (sym_sec != NULL && sym_sec->output_section != NULL)
4275 1.7 christos {
4276 1.7 christos bfd_vma from, to;
4277 1.7 christos if (h != NULL)
4278 1.7 christos to = h->root.u.def.value;
4279 1.7 christos else
4280 1.7 christos to = sym->st_value;
4281 1.7 christos to += (rel->r_addend
4282 1.7 christos + sym_sec->output_offset
4283 1.7 christos + sym_sec->output_section->vma);
4284 1.7 christos from = (rel->r_offset
4285 1.7 christos + sec->output_offset
4286 1.7 christos + sec->output_section->vma);
4287 1.7 christos if (to - from + limit < 2 * limit)
4288 1.7 christos *tls_maskp &= ~PLT_KEEP;
4289 1.7 christos }
4290 1.7 christos }
4291 1.7 christos if (elf_section_data (sec)->relocs != relstart)
4292 1.7 christos free (relstart);
4293 1.7 christos }
4294 1.7 christos
4295 1.7 christos if (local_syms != NULL
4296 1.7 christos && symtab_hdr->contents != (unsigned char *) local_syms)
4297 1.7 christos {
4298 1.7 christos if (!info->keep_memory)
4299 1.7 christos free (local_syms);
4300 1.7 christos else
4301 1.7 christos symtab_hdr->contents = (unsigned char *) local_syms;
4302 1.7 christos }
4303 1.7 christos }
4304 1.7 christos
4305 1.7 christos return TRUE;
4306 1.7 christos }
4307 1.7 christos
4308 1.7 christos /* Set plt output section type, htab->tls_get_addr, and call the
4309 1.7 christos generic ELF tls_setup function. */
4310 1.7 christos
4311 1.7 christos asection *
4312 1.1 christos ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4313 1.1 christos {
4314 1.1 christos struct ppc_elf_link_hash_table *htab;
4315 1.1 christos
4316 1.1 christos htab = ppc_elf_hash_table (info);
4317 1.1 christos htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4318 1.1 christos FALSE, FALSE, TRUE);
4319 1.1 christos if (htab->plt_type != PLT_NEW)
4320 1.1 christos htab->params->no_tls_get_addr_opt = TRUE;
4321 1.1 christos
4322 1.1 christos if (!htab->params->no_tls_get_addr_opt)
4323 1.1 christos {
4324 1.1 christos struct elf_link_hash_entry *opt, *tga;
4325 1.1 christos opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4326 1.1 christos FALSE, FALSE, TRUE);
4327 1.1 christos if (opt != NULL
4328 1.1 christos && (opt->root.type == bfd_link_hash_defined
4329 1.1 christos || opt->root.type == bfd_link_hash_defweak))
4330 1.7 christos {
4331 1.1 christos /* If glibc supports an optimized __tls_get_addr call stub,
4332 1.1 christos signalled by the presence of __tls_get_addr_opt, and we'll
4333 1.1 christos be calling __tls_get_addr via a plt call stub, then
4334 1.1 christos make __tls_get_addr point to __tls_get_addr_opt. */
4335 1.1 christos tga = htab->tls_get_addr;
4336 1.1 christos if (htab->elf.dynamic_sections_created
4337 1.1 christos && tga != NULL
4338 1.1 christos && (tga->type == STT_FUNC
4339 1.1 christos || tga->needs_plt)
4340 1.1 christos && !(SYMBOL_CALLS_LOCAL (info, tga)
4341 1.7 christos || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
4342 1.1 christos {
4343 1.1 christos struct plt_entry *ent;
4344 1.1 christos for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
4345 1.1 christos if (ent->plt.refcount > 0)
4346 1.1 christos break;
4347 1.1 christos if (ent != NULL)
4348 1.1 christos {
4349 1.1 christos tga->root.type = bfd_link_hash_indirect;
4350 1.1 christos tga->root.u.i.link = &opt->root;
4351 1.1 christos ppc_elf_copy_indirect_symbol (info, opt, tga);
4352 1.1 christos opt->mark = 1;
4353 1.1 christos if (opt->dynindx != -1)
4354 1.1 christos {
4355 1.1 christos /* Use __tls_get_addr_opt in dynamic relocations. */
4356 1.3 christos opt->dynindx = -1;
4357 1.1 christos _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4358 1.1 christos opt->dynstr_index);
4359 1.7 christos if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4360 1.7 christos return FALSE;
4361 1.1 christos }
4362 1.7 christos htab->tls_get_addr = opt;
4363 1.7 christos }
4364 1.1 christos }
4365 1.1 christos }
4366 1.1 christos else
4367 1.1 christos htab->params->no_tls_get_addr_opt = TRUE;
4368 1.1 christos }
4369 1.1 christos if (htab->plt_type == PLT_NEW
4370 1.1 christos && htab->elf.splt != NULL
4371 1.1 christos && htab->elf.splt->output_section != NULL)
4372 1.1 christos {
4373 1.1 christos elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
4374 1.1 christos elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
4375 1.1 christos }
4376 1.1 christos
4377 1.1 christos return _bfd_elf_tls_setup (obfd, info);
4378 1.1 christos }
4379 1.1 christos
4380 1.1 christos /* Return TRUE iff REL is a branch reloc with a global symbol matching
4381 1.1 christos HASH. */
4382 1.1 christos
4383 1.1 christos static bfd_boolean
4384 1.1 christos branch_reloc_hash_match (const bfd *ibfd,
4385 1.1 christos const Elf_Internal_Rela *rel,
4386 1.1 christos const struct elf_link_hash_entry *hash)
4387 1.1 christos {
4388 1.1 christos Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4389 1.1 christos enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4390 1.1 christos unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4391 1.1 christos
4392 1.1 christos if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4393 1.1 christos {
4394 1.1 christos struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4395 1.1 christos struct elf_link_hash_entry *h;
4396 1.1 christos
4397 1.1 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4398 1.1 christos while (h->root.type == bfd_link_hash_indirect
4399 1.1 christos || h->root.type == bfd_link_hash_warning)
4400 1.1 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
4401 1.1 christos if (h == hash)
4402 1.1 christos return TRUE;
4403 1.1 christos }
4404 1.1 christos return FALSE;
4405 1.1 christos }
4406 1.1 christos
4407 1.1 christos /* Run through all the TLS relocs looking for optimization
4408 1.3 christos opportunities. */
4409 1.1 christos
4410 1.1 christos bfd_boolean
4411 1.1 christos ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4412 1.1 christos struct bfd_link_info *info)
4413 1.1 christos {
4414 1.1 christos bfd *ibfd;
4415 1.1 christos asection *sec;
4416 1.1 christos struct ppc_elf_link_hash_table *htab;
4417 1.1 christos int pass;
4418 1.1 christos
4419 1.1 christos if (!bfd_link_executable (info))
4420 1.1 christos return TRUE;
4421 1.1 christos
4422 1.3 christos htab = ppc_elf_hash_table (info);
4423 1.1 christos if (htab == NULL)
4424 1.1 christos return FALSE;
4425 1.1 christos
4426 1.1 christos /* Make two passes through the relocs. First time check that tls
4427 1.1 christos relocs involved in setting up a tls_get_addr call are indeed
4428 1.1 christos followed by such a call. If they are not, don't do any tls
4429 1.1 christos optimization. On the second pass twiddle tls_mask flags to
4430 1.1 christos notify relocate_section that optimization can be done, and
4431 1.1 christos adjust got and plt refcounts. */
4432 1.1 christos for (pass = 0; pass < 2; ++pass)
4433 1.1 christos for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4434 1.1 christos {
4435 1.1 christos Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4436 1.1 christos asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
4437 1.1 christos
4438 1.1 christos for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4439 1.1 christos if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4440 1.1 christos {
4441 1.1 christos Elf_Internal_Rela *relstart, *rel, *relend;
4442 1.1 christos int expecting_tls_get_addr = 0;
4443 1.1 christos
4444 1.1 christos /* Read the relocations. */
4445 1.7 christos relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4446 1.7 christos info->keep_memory);
4447 1.1 christos if (relstart == NULL)
4448 1.1 christos return FALSE;
4449 1.1 christos
4450 1.1 christos relend = relstart + sec->reloc_count;
4451 1.1 christos for (rel = relstart; rel < relend; rel++)
4452 1.1 christos {
4453 1.1 christos enum elf_ppc_reloc_type r_type;
4454 1.1 christos unsigned long r_symndx;
4455 1.1 christos struct elf_link_hash_entry *h = NULL;
4456 1.1 christos unsigned char *tls_mask;
4457 1.1 christos unsigned char tls_set, tls_clear;
4458 1.1 christos bfd_boolean is_local;
4459 1.1 christos bfd_signed_vma *got_count;
4460 1.1 christos
4461 1.1 christos r_symndx = ELF32_R_SYM (rel->r_info);
4462 1.9 christos if (r_symndx >= symtab_hdr->sh_info)
4463 1.1 christos {
4464 1.1 christos struct elf_link_hash_entry **sym_hashes;
4465 1.1 christos
4466 1.1 christos sym_hashes = elf_sym_hashes (ibfd);
4467 1.1 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4468 1.1 christos while (h->root.type == bfd_link_hash_indirect
4469 1.1 christos || h->root.type == bfd_link_hash_warning)
4470 1.1 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
4471 1.9 christos }
4472 1.1 christos
4473 1.1 christos is_local = SYMBOL_REFERENCES_LOCAL (info, h);
4474 1.1 christos r_type = ELF32_R_TYPE (rel->r_info);
4475 1.1 christos /* If this section has old-style __tls_get_addr calls
4476 1.1 christos without marker relocs, then check that each
4477 1.1 christos __tls_get_addr call reloc is preceded by a reloc
4478 1.1 christos that conceivably belongs to the __tls_get_addr arg
4479 1.1 christos setup insn. If we don't find matching arg setup
4480 1.1 christos relocs, don't do any tls optimization. */
4481 1.1 christos if (pass == 0
4482 1.1 christos && sec->nomark_tls_get_addr
4483 1.1 christos && h != NULL
4484 1.1 christos && h == htab->tls_get_addr
4485 1.1 christos && !expecting_tls_get_addr
4486 1.1 christos && is_branch_reloc (r_type))
4487 1.1 christos {
4488 1.1 christos info->callbacks->minfo ("%H __tls_get_addr lost arg, "
4489 1.1 christos "TLS optimization disabled\n",
4490 1.1 christos ibfd, sec, rel->r_offset);
4491 1.7 christos if (elf_section_data (sec)->relocs != relstart)
4492 1.1 christos free (relstart);
4493 1.1 christos return TRUE;
4494 1.1 christos }
4495 1.1 christos
4496 1.1 christos expecting_tls_get_addr = 0;
4497 1.1 christos switch (r_type)
4498 1.1 christos {
4499 1.1 christos case R_PPC_GOT_TLSLD16:
4500 1.1 christos case R_PPC_GOT_TLSLD16_LO:
4501 1.1 christos expecting_tls_get_addr = 1;
4502 1.1 christos /* Fall through. */
4503 1.1 christos
4504 1.1 christos case R_PPC_GOT_TLSLD16_HI:
4505 1.1 christos case R_PPC_GOT_TLSLD16_HA:
4506 1.1 christos /* These relocs should never be against a symbol
4507 1.1 christos defined in a shared lib. Leave them alone if
4508 1.1 christos that turns out to be the case. */
4509 1.7 christos if (!is_local)
4510 1.1 christos continue;
4511 1.1 christos
4512 1.1 christos /* LD -> LE */
4513 1.1 christos tls_set = 0;
4514 1.1 christos tls_clear = TLS_LD;
4515 1.1 christos break;
4516 1.1 christos
4517 1.1 christos case R_PPC_GOT_TLSGD16:
4518 1.9 christos case R_PPC_GOT_TLSGD16_LO:
4519 1.1 christos expecting_tls_get_addr = 1;
4520 1.1 christos /* Fall through. */
4521 1.1 christos
4522 1.1 christos case R_PPC_GOT_TLSGD16_HI:
4523 1.1 christos case R_PPC_GOT_TLSGD16_HA:
4524 1.1 christos if (is_local)
4525 1.1 christos /* GD -> LE */
4526 1.1 christos tls_set = 0;
4527 1.1 christos else
4528 1.1 christos /* GD -> IE */
4529 1.1 christos tls_set = TLS_TLS | TLS_GDIE;
4530 1.1 christos tls_clear = TLS_GD;
4531 1.1 christos break;
4532 1.1 christos
4533 1.1 christos case R_PPC_GOT_TPREL16:
4534 1.1 christos case R_PPC_GOT_TPREL16_LO:
4535 1.1 christos case R_PPC_GOT_TPREL16_HI:
4536 1.9 christos case R_PPC_GOT_TPREL16_HA:
4537 1.9 christos if (is_local)
4538 1.9 christos {
4539 1.9 christos /* IE -> LE */
4540 1.1 christos tls_set = 0;
4541 1.7 christos tls_clear = TLS_TPREL;
4542 1.7 christos break;
4543 1.7 christos }
4544 1.7 christos else
4545 1.7 christos continue;
4546 1.7 christos
4547 1.7 christos case R_PPC_TLSLD:
4548 1.7 christos if (!is_local)
4549 1.7 christos continue;
4550 1.7 christos /* Fall through. */
4551 1.7 christos case R_PPC_TLSGD:
4552 1.7 christos if (rel + 1 < relend
4553 1.7 christos && is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
4554 1.7 christos {
4555 1.7 christos if (pass != 0
4556 1.7 christos && ELF32_R_TYPE (rel[1].r_info) != R_PPC_PLTSEQ)
4557 1.7 christos {
4558 1.7 christos r_type = ELF32_R_TYPE (rel[1].r_info);
4559 1.7 christos r_symndx = ELF32_R_SYM (rel[1].r_info);
4560 1.7 christos if (r_symndx >= symtab_hdr->sh_info)
4561 1.7 christos {
4562 1.7 christos struct elf_link_hash_entry **sym_hashes;
4563 1.7 christos
4564 1.7 christos sym_hashes = elf_sym_hashes (ibfd);
4565 1.7 christos h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4566 1.7 christos while (h->root.type == bfd_link_hash_indirect
4567 1.7 christos || h->root.type == bfd_link_hash_warning)
4568 1.7 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
4569 1.7 christos if (h != NULL)
4570 1.7 christos {
4571 1.7 christos struct plt_entry *ent = NULL;
4572 1.7 christos bfd_vma addend = 0;
4573 1.7 christos
4574 1.7 christos if (bfd_link_pic (info))
4575 1.1 christos addend = rel->r_addend;
4576 1.1 christos ent = find_plt_ent (&h->plt.plist,
4577 1.1 christos got2, addend);
4578 1.1 christos if (ent != NULL
4579 1.1 christos && ent->plt.refcount > 0)
4580 1.1 christos ent->plt.refcount -= 1;
4581 1.1 christos }
4582 1.1 christos }
4583 1.1 christos }
4584 1.1 christos continue;
4585 1.1 christos }
4586 1.1 christos expecting_tls_get_addr = 2;
4587 1.9 christos tls_set = 0;
4588 1.1 christos tls_clear = 0;
4589 1.1 christos break;
4590 1.1 christos
4591 1.1 christos default:
4592 1.1 christos continue;
4593 1.1 christos }
4594 1.1 christos
4595 1.1 christos if (pass == 0)
4596 1.1 christos {
4597 1.1 christos if (!expecting_tls_get_addr
4598 1.1 christos || !sec->nomark_tls_get_addr)
4599 1.1 christos continue;
4600 1.1 christos
4601 1.1 christos if (rel + 1 < relend
4602 1.1 christos && branch_reloc_hash_match (ibfd, rel + 1,
4603 1.1 christos htab->tls_get_addr))
4604 1.1 christos continue;
4605 1.1 christos
4606 1.1 christos /* Uh oh, we didn't find the expected call. We
4607 1.1 christos could just mark this symbol to exclude it
4608 1.1 christos from tls optimization but it's safer to skip
4609 1.1 christos the entire optimization. */
4610 1.1 christos info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
4611 1.1 christos "TLS optimization disabled\n"),
4612 1.1 christos ibfd, sec, rel->r_offset);
4613 1.1 christos if (elf_section_data (sec)->relocs != relstart)
4614 1.1 christos free (relstart);
4615 1.1 christos return TRUE;
4616 1.7 christos }
4617 1.1 christos
4618 1.1 christos if (h != NULL)
4619 1.1 christos {
4620 1.1 christos tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4621 1.1 christos got_count = &h->got.refcount;
4622 1.1 christos }
4623 1.7 christos else
4624 1.7 christos {
4625 1.1 christos bfd_signed_vma *lgot_refs;
4626 1.1 christos struct plt_entry **local_plt;
4627 1.1 christos unsigned char *lgot_masks;
4628 1.1 christos
4629 1.7 christos lgot_refs = elf_local_got_refcounts (ibfd);
4630 1.7 christos if (lgot_refs == NULL)
4631 1.7 christos abort ();
4632 1.7 christos local_plt = (struct plt_entry **)
4633 1.7 christos (lgot_refs + symtab_hdr->sh_info);
4634 1.7 christos lgot_masks = (unsigned char *)
4635 1.7 christos (local_plt + symtab_hdr->sh_info);
4636 1.7 christos tls_mask = &lgot_masks[r_symndx];
4637 1.9 christos got_count = &lgot_refs[r_symndx];
4638 1.7 christos }
4639 1.7 christos
4640 1.7 christos /* If we don't have old-style __tls_get_addr calls
4641 1.7 christos without TLSGD/TLSLD marker relocs, and we haven't
4642 1.9 christos found a new-style __tls_get_addr call with a
4643 1.7 christos marker for this symbol, then we either have a
4644 1.7 christos broken object file or an -mlongcall style
4645 1.7 christos indirect call to __tls_get_addr without a marker.
4646 1.7 christos Disable optimization in this case. */
4647 1.7 christos if ((tls_clear & (TLS_GD | TLS_LD)) != 0
4648 1.7 christos && !sec->nomark_tls_get_addr
4649 1.7 christos && ((*tls_mask & (TLS_TLS | TLS_MARK))
4650 1.7 christos != (TLS_TLS | TLS_MARK)))
4651 1.7 christos continue;
4652 1.7 christos
4653 1.7 christos if (expecting_tls_get_addr == 1 + !sec->nomark_tls_get_addr)
4654 1.7 christos {
4655 1.7 christos struct plt_entry *ent;
4656 1.9 christos bfd_vma addend = 0;
4657 1.9 christos
4658 1.7 christos if (bfd_link_pic (info)
4659 1.1 christos && (ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24
4660 1.1 christos || ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTCALL))
4661 1.1 christos addend = rel[1].r_addend;
4662 1.1 christos ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4663 1.1 christos got2, addend);
4664 1.1 christos if (ent != NULL && ent->plt.refcount > 0)
4665 1.1 christos ent->plt.refcount -= 1;
4666 1.1 christos }
4667 1.1 christos if (tls_clear == 0)
4668 1.1 christos continue;
4669 1.1 christos
4670 1.1 christos if (tls_set == 0)
4671 1.1 christos {
4672 1.1 christos /* We managed to get rid of a got entry. */
4673 1.1 christos if (*got_count > 0)
4674 1.7 christos *got_count -= 1;
4675 1.1 christos }
4676 1.1 christos
4677 1.1 christos *tls_mask |= tls_set;
4678 1.7 christos *tls_mask &= ~tls_clear;
4679 1.1 christos }
4680 1.7 christos
4681 1.7 christos if (elf_section_data (sec)->relocs != relstart)
4682 1.1 christos free (relstart);
4683 1.1 christos }
4684 1.1 christos }
4685 1.1 christos htab->do_tls_opt = 1;
4686 1.1 christos return TRUE;
4687 1.1 christos }
4688 1.1 christos
4689 1.7 christos /* Find dynamic relocs for H that apply to read-only sections. */
4691 1.1 christos
4692 1.7 christos static asection *
4693 1.7 christos readonly_dynrelocs (struct elf_link_hash_entry *h)
4694 1.7 christos {
4695 1.7 christos struct elf_dyn_relocs *p;
4696 1.7 christos
4697 1.7 christos for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4698 1.7 christos {
4699 1.7 christos asection *s = p->sec->output_section;
4700 1.7 christos
4701 1.7 christos if (s != NULL && (s->flags & SEC_READONLY) != 0)
4702 1.7 christos return p->sec;
4703 1.7 christos }
4704 1.7 christos return NULL;
4705 1.7 christos }
4706 1.7 christos
4707 1.7 christos /* Return true if we have dynamic relocs against H or any of its weak
4708 1.7 christos aliases, that apply to read-only sections. Cannot be used after
4709 1.7 christos size_dynamic_sections. */
4710 1.7 christos
4711 1.7 christos static bfd_boolean
4712 1.7 christos alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
4713 1.7 christos {
4714 1.7 christos struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
4715 1.7 christos do
4716 1.7 christos {
4717 1.7 christos if (readonly_dynrelocs (&eh->elf))
4718 1.7 christos return TRUE;
4719 1.7 christos eh = ppc_elf_hash_entry (eh->elf.u.alias);
4720 1.7 christos } while (eh != NULL && &eh->elf != h);
4721 1.7 christos
4722 1.7 christos return FALSE;
4723 1.1 christos }
4724 1.1 christos
4725 1.1 christos /* Return whether H has pc-relative dynamic relocs. */
4726 1.1 christos
4727 1.1 christos static bfd_boolean
4728 1.1 christos pc_dynrelocs (struct elf_link_hash_entry *h)
4729 1.1 christos {
4730 1.1 christos struct elf_dyn_relocs *p;
4731 1.1 christos
4732 1.1 christos for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4733 1.1 christos if (p->pc_count != 0)
4734 1.1 christos return TRUE;
4735 1.1 christos return FALSE;
4736 1.1 christos }
4737 1.1 christos
4738 1.1 christos /* Adjust a symbol defined by a dynamic object and referenced by a
4739 1.1 christos regular object. The current definition is in some section of the
4740 1.1 christos dynamic object, but we're not including those sections. We have to
4741 1.1 christos change the definition to something the rest of the link can
4742 1.1 christos understand. */
4743 1.1 christos
4744 1.1 christos static bfd_boolean
4745 1.1 christos ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4746 1.1 christos struct elf_link_hash_entry *h)
4747 1.1 christos {
4748 1.1 christos struct ppc_elf_link_hash_table *htab;
4749 1.7 christos asection *s;
4750 1.1 christos
4751 1.1 christos #ifdef DEBUG
4752 1.1 christos fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4753 1.1 christos h->root.root.string);
4754 1.1 christos #endif
4755 1.1 christos
4756 1.1 christos /* Make sure we know what is going on here. */
4757 1.1 christos htab = ppc_elf_hash_table (info);
4758 1.1 christos BFD_ASSERT (htab->elf.dynobj != NULL
4759 1.7 christos && (h->needs_plt
4760 1.7 christos || h->type == STT_GNU_IFUNC
4761 1.7 christos || h->is_weakalias
4762 1.7 christos || (h->def_dynamic
4763 1.7 christos && h->ref_regular
4764 1.7 christos && !h->def_regular)));
4765 1.7 christos
4766 1.1 christos /* Deal with function syms. */
4767 1.1 christos if (h->type == STT_FUNC
4768 1.1 christos || h->type == STT_GNU_IFUNC
4769 1.1 christos || h->needs_plt)
4770 1.1 christos {
4771 1.1 christos bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
4772 1.1 christos || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
4773 1.1 christos /* Discard dyn_relocs when non-pic if we've decided that a
4774 1.7 christos function symbol is local. */
4775 1.7 christos if (!bfd_link_pic (info) && local)
4776 1.7 christos ppc_elf_hash_entry (h)->dyn_relocs = NULL;
4777 1.7 christos
4778 1.1 christos /* Clear procedure linkage table information for any symbol that
4779 1.1 christos won't need a .plt entry. */
4780 1.1 christos struct plt_entry *ent;
4781 1.1 christos for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4782 1.1 christos if (ent->plt.refcount > 0)
4783 1.1 christos break;
4784 1.1 christos if (ent == NULL
4785 1.1 christos || (h->type != STT_GNU_IFUNC
4786 1.1 christos && local
4787 1.1 christos && (htab->can_convert_all_inline_plt
4788 1.1 christos || (ppc_elf_hash_entry (h)->tls_mask
4789 1.1 christos & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
4790 1.1 christos {
4791 1.3 christos /* A PLT entry is not required/allowed when:
4792 1.1 christos
4793 1.1 christos 1. We are not using ld.so; because then the PLT entry
4794 1.1 christos can't be set up, so we can't use one. In this case,
4795 1.3 christos ppc_elf_adjust_dynamic_symbol won't even be called.
4796 1.3 christos
4797 1.3 christos 2. GC has rendered the entry unused.
4798 1.7 christos
4799 1.7 christos 3. We know for certain that a call to this symbol
4800 1.7 christos will go to this object, or will remain undefined. */
4801 1.7 christos h->plt.plist = NULL;
4802 1.7 christos h->needs_plt = 0;
4803 1.7 christos h->pointer_equality_needed = 0;
4804 1.7 christos }
4805 1.7 christos else
4806 1.7 christos {
4807 1.7 christos /* Taking a function's address in a read/write section
4808 1.3 christos doesn't require us to define the function symbol in the
4809 1.3 christos executable on a plt call stub. A dynamic reloc can
4810 1.7 christos be used instead, giving better runtime performance.
4811 1.3 christos (Calls via that function pointer don't need to bounce
4812 1.3 christos through the plt call stub.) Similarly, use a dynamic
4813 1.7 christos reloc for a weak reference when possible, allowing the
4814 1.7 christos resolution of the symbol to be set at load time rather
4815 1.7 christos than link time. */
4816 1.7 christos if ((h->pointer_equality_needed
4817 1.7 christos || (h->non_got_ref
4818 1.7 christos && !h->ref_regular_nonweak
4819 1.7 christos && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4820 1.7 christos && !htab->is_vxworks
4821 1.7 christos && !ppc_elf_hash_entry (h)->has_sda_refs
4822 1.1 christos && !readonly_dynrelocs (h))
4823 1.3 christos {
4824 1.7 christos h->pointer_equality_needed = 0;
4825 1.1 christos /* If we haven't seen a branch reloc and the symbol
4826 1.1 christos isn't an ifunc then we don't need a plt entry. */
4827 1.1 christos if (!h->needs_plt && h->type != STT_GNU_IFUNC)
4828 1.1 christos h->plt.plist = NULL;
4829 1.1 christos }
4830 1.1 christos else if (!bfd_link_pic (info))
4831 1.1 christos /* We are going to be defining the function symbol on the
4832 1.1 christos plt stub, so no dyn_relocs needed when non-pic. */
4833 1.7 christos ppc_elf_hash_entry (h)->dyn_relocs = NULL;
4834 1.1 christos }
4835 1.7 christos h->protected_def = 0;
4836 1.7 christos /* Function symbols can't have copy relocs. */
4837 1.7 christos return TRUE;
4838 1.7 christos }
4839 1.7 christos else
4840 1.7 christos h->plt.plist = NULL;
4841 1.7 christos
4842 1.7 christos /* If this is a weak symbol, and there is a real definition, the
4843 1.1 christos processor independent code will have arranged for us to see the
4844 1.1 christos real definition first, and we can just use the same value. */
4845 1.1 christos if (h->is_weakalias)
4846 1.1 christos {
4847 1.1 christos struct elf_link_hash_entry *def = weakdef (h);
4848 1.1 christos BFD_ASSERT (def->root.type == bfd_link_hash_defined);
4849 1.1 christos h->root.u.def.section = def->root.u.def.section;
4850 1.1 christos h->root.u.def.value = def->root.u.def.value;
4851 1.1 christos if (def->root.u.def.section == htab->elf.sdynbss
4852 1.1 christos || def->root.u.def.section == htab->elf.sdynrelro
4853 1.3 christos || def->root.u.def.section == htab->dynsbss)
4854 1.3 christos ppc_elf_hash_entry (h)->dyn_relocs = NULL;
4855 1.3 christos return TRUE;
4856 1.3 christos }
4857 1.3 christos
4858 1.1 christos /* This is a reference to a symbol defined by a dynamic object which
4859 1.1 christos is not a function. */
4860 1.1 christos
4861 1.1 christos /* If we are creating a shared library, we must presume that the
4862 1.3 christos only references to the symbol are via the global offset table.
4863 1.3 christos For such cases we need not do anything here; the relocations will
4864 1.3 christos be handled correctly by relocate_section. */
4865 1.3 christos if (bfd_link_pic (info))
4866 1.3 christos {
4867 1.3 christos h->protected_def = 0;
4868 1.3 christos return TRUE;
4869 1.3 christos }
4870 1.3 christos
4871 1.3 christos /* If there are no references to this symbol that do not use the
4872 1.3 christos GOT, we don't need to generate a copy reloc. */
4873 1.3 christos if (!h->non_got_ref)
4874 1.3 christos {
4875 1.3 christos h->protected_def = 0;
4876 1.3 christos return TRUE;
4877 1.3 christos }
4878 1.3 christos
4879 1.3 christos /* Protected variables do not work with .dynbss. The copy in
4880 1.3 christos .dynbss won't be used by the shared library with the protected
4881 1.3 christos definition for the variable. Editing to PIC, or text relocations
4882 1.3 christos are preferable to an incorrect program. */
4883 1.3 christos if (h->protected_def)
4884 1.7 christos {
4885 1.1 christos if (ELIMINATE_COPY_RELOCS
4886 1.7 christos && ppc_elf_hash_entry (h)->has_addr16_ha
4887 1.1 christos && ppc_elf_hash_entry (h)->has_addr16_lo
4888 1.1 christos && htab->params->pic_fixup == 0
4889 1.1 christos && info->disable_target_specific_optimizations <= 1)
4890 1.1 christos htab->params->pic_fixup = 1;
4891 1.1 christos return TRUE;
4892 1.1 christos }
4893 1.1 christos
4894 1.1 christos /* If -z nocopyreloc was given, we won't generate them either. */
4895 1.1 christos if (info->nocopyreloc)
4896 1.7 christos return TRUE;
4897 1.7 christos
4898 1.1 christos /* If we don't find any dynamic relocs in read-only sections, then
4899 1.1 christos we'll be keeping the dynamic relocs and avoiding the copy reloc.
4900 1.1 christos We can't do this if there are any small data relocations. This
4901 1.1 christos doesn't work on VxWorks, where we can not have dynamic
4902 1.1 christos relocations (other than copy and jump slot relocations) in an
4903 1.1 christos executable. */
4904 1.1 christos if (ELIMINATE_COPY_RELOCS
4905 1.1 christos && !ppc_elf_hash_entry (h)->has_sda_refs
4906 1.1 christos && !htab->is_vxworks
4907 1.1 christos && !h->def_regular
4908 1.1 christos && !alias_readonly_dynrelocs (h))
4909 1.1 christos return TRUE;
4910 1.1 christos
4911 1.1 christos /* We must allocate the symbol in our .dynbss section, which will
4912 1.1 christos become part of the .bss section of the executable. There will be
4913 1.7 christos an entry for this symbol in the .dynsym section. The dynamic
4914 1.7 christos object will contain position independent code, so all references
4915 1.1 christos from the dynamic object to this symbol will go through the global
4916 1.7 christos offset table. The dynamic linker will use the .dynsym entry to
4917 1.1 christos determine the address it must put in the global offset table, so
4918 1.1 christos both the dynamic object and the regular object will refer to the
4919 1.1 christos same memory location for the variable.
4920 1.1 christos
4921 1.1 christos Of course, if the symbol is referenced using SDAREL relocs, we
4922 1.1 christos must instead allocate it in .sbss. */
4923 1.7 christos if (ppc_elf_hash_entry (h)->has_sda_refs)
4924 1.7 christos s = htab->dynsbss;
4925 1.7 christos else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
4926 1.1 christos s = htab->elf.sdynrelro;
4927 1.1 christos else
4928 1.7 christos s = htab->elf.sdynbss;
4929 1.7 christos BFD_ASSERT (s != NULL);
4930 1.1 christos
4931 1.7 christos if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
4932 1.1 christos {
4933 1.1 christos asection *srel;
4934 1.1 christos
4935 1.1 christos /* We must generate a R_PPC_COPY reloc to tell the dynamic
4936 1.1 christos linker to copy the initial value out of the dynamic object
4937 1.7 christos and into the runtime process image. */
4938 1.7 christos if (ppc_elf_hash_entry (h)->has_sda_refs)
4939 1.3 christos srel = htab->relsbss;
4940 1.1 christos else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
4941 1.1 christos srel = htab->elf.sreldynrelro;
4942 1.1 christos else
4943 1.1 christos srel = htab->elf.srelbss;
4944 1.1 christos BFD_ASSERT (srel != NULL);
4945 1.1 christos srel->size += sizeof (Elf32_External_Rela);
4946 1.1 christos h->needs_copy = 1;
4947 1.1 christos }
4948 1.1 christos
4949 1.1 christos /* We no longer want dyn_relocs. */
4950 1.1 christos ppc_elf_hash_entry (h)->dyn_relocs = NULL;
4951 1.1 christos return _bfd_elf_adjust_dynamic_copy (info, h, s);
4952 1.1 christos }
4953 1.1 christos
4954 1.1 christos /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4956 1.1 christos xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4957 1.1 christos specifying the addend on the plt relocation. For -fpic code, the sym
4958 1.1 christos is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4959 1.3 christos xxxxxxxx.got2.plt_pic32.<callee>. */
4960 1.1 christos
4961 1.1 christos static bfd_boolean
4962 1.1 christos add_stub_sym (struct plt_entry *ent,
4963 1.1 christos struct elf_link_hash_entry *h,
4964 1.1 christos struct bfd_link_info *info)
4965 1.1 christos {
4966 1.1 christos struct elf_link_hash_entry *sh;
4967 1.1 christos size_t len1, len2, len3;
4968 1.1 christos char *name;
4969 1.1 christos const char *stub;
4970 1.1 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4971 1.1 christos
4972 1.1 christos if (bfd_link_pic (info))
4973 1.1 christos stub = ".plt_pic32.";
4974 1.1 christos else
4975 1.1 christos stub = ".plt_call32.";
4976 1.1 christos
4977 1.1 christos len1 = strlen (h->root.root.string);
4978 1.1 christos len2 = strlen (stub);
4979 1.1 christos len3 = 0;
4980 1.1 christos if (ent->sec)
4981 1.1 christos len3 = strlen (ent->sec->name);
4982 1.1 christos name = bfd_malloc (len1 + len2 + len3 + 9);
4983 1.1 christos if (name == NULL)
4984 1.1 christos return FALSE;
4985 1.1 christos sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4986 1.1 christos if (ent->sec)
4987 1.1 christos memcpy (name + 8, ent->sec->name, len3);
4988 1.1 christos memcpy (name + 8 + len3, stub, len2);
4989 1.1 christos memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4990 1.3 christos sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4991 1.1 christos if (sh == NULL)
4992 1.1 christos return FALSE;
4993 1.1 christos if (sh->root.type == bfd_link_hash_new)
4994 1.1 christos {
4995 1.1 christos sh->root.type = bfd_link_hash_defined;
4996 1.1 christos sh->root.u.def.section = htab->glink;
4997 1.1 christos sh->root.u.def.value = ent->glink_offset;
4998 1.1 christos sh->ref_regular = 1;
4999 1.1 christos sh->def_regular = 1;
5000 1.1 christos sh->ref_regular_nonweak = 1;
5001 1.1 christos sh->forced_local = 1;
5002 1.1 christos sh->non_elf = 0;
5003 1.1 christos sh->root.linker_def = 1;
5004 1.1 christos }
5005 1.1 christos return TRUE;
5006 1.7 christos }
5007 1.7 christos
5008 1.1 christos /* Allocate NEED contiguous space in .got, and return the offset.
5009 1.1 christos Handles allocation of the got header when crossing 32k. */
5010 1.1 christos
5011 1.1 christos static bfd_vma
5012 1.1 christos allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5013 1.1 christos {
5014 1.1 christos bfd_vma where;
5015 1.1 christos unsigned int max_before_header;
5016 1.1 christos
5017 1.1 christos if (htab->plt_type == PLT_VXWORKS)
5018 1.1 christos {
5019 1.7 christos where = htab->elf.sgot->size;
5020 1.7 christos htab->elf.sgot->size += need;
5021 1.1 christos }
5022 1.7 christos else
5023 1.7 christos {
5024 1.1 christos max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5025 1.7 christos if (need <= htab->got_gap)
5026 1.7 christos {
5027 1.1 christos where = max_before_header - htab->got_gap;
5028 1.1 christos htab->got_gap -= need;
5029 1.1 christos }
5030 1.1 christos else
5031 1.1 christos {
5032 1.7 christos if (htab->elf.sgot->size + need > max_before_header
5033 1.7 christos && htab->elf.sgot->size <= max_before_header)
5034 1.7 christos {
5035 1.7 christos htab->got_gap = max_before_header - htab->elf.sgot->size;
5036 1.7 christos htab->elf.sgot->size = max_before_header + htab->got_header_size;
5037 1.7 christos }
5038 1.7 christos where = htab->elf.sgot->size;
5039 1.7 christos htab->elf.sgot->size += need;
5040 1.7 christos }
5041 1.7 christos }
5042 1.7 christos return where;
5043 1.7 christos }
5044 1.7 christos
5045 1.7 christos /* Calculate size of GOT entries for symbol given its TLS_MASK.
5046 1.9 christos TLS_LD is excluded because those go in a special GOT slot. */
5047 1.7 christos
5048 1.7 christos static inline unsigned int
5049 1.7 christos got_entries_needed (int tls_mask)
5050 1.7 christos {
5051 1.7 christos unsigned int need;
5052 1.7 christos if ((tls_mask & TLS_TLS) == 0)
5053 1.7 christos need = 4;
5054 1.7 christos else
5055 1.7 christos {
5056 1.7 christos need = 0;
5057 1.7 christos if ((tls_mask & TLS_GD) != 0)
5058 1.7 christos need += 8;
5059 1.7 christos if ((tls_mask & (TLS_TPREL | TLS_GDIE)) != 0)
5060 1.7 christos need += 4;
5061 1.7 christos if ((tls_mask & TLS_DTPREL) != 0)
5062 1.7 christos need += 4;
5063 1.7 christos }
5064 1.7 christos return need;
5065 1.7 christos }
5066 1.7 christos
5067 1.7 christos /* If H is undefined, make it dynamic if that makes sense. */
5068 1.7 christos
5069 1.7 christos static bfd_boolean
5070 1.7 christos ensure_undef_dynamic (struct bfd_link_info *info,
5071 1.7 christos struct elf_link_hash_entry *h)
5072 1.7 christos {
5073 1.1 christos struct elf_link_hash_table *htab = elf_hash_table (info);
5074 1.1 christos
5075 1.1 christos if (htab->dynamic_sections_created
5076 1.1 christos && ((info->dynamic_undefined_weak != 0
5077 1.1 christos && h->root.type == bfd_link_hash_undefweak)
5078 1.1 christos || h->root.type == bfd_link_hash_undefined)
5079 1.1 christos && h->dynindx == -1
5080 1.1 christos && !h->forced_local
5081 1.1 christos && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5082 1.7 christos return bfd_elf_link_record_dynamic_symbol (info, h);
5083 1.1 christos return TRUE;
5084 1.1 christos }
5085 1.1 christos
5086 1.1 christos /* Allocate space in associated reloc sections for dynamic relocs. */
5087 1.1 christos
5088 1.1 christos static bfd_boolean
5089 1.3 christos allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5090 1.3 christos {
5091 1.3 christos struct bfd_link_info *info = inf;
5092 1.3 christos struct ppc_elf_link_hash_entry *eh;
5093 1.3 christos struct ppc_elf_link_hash_table *htab;
5094 1.3 christos struct elf_dyn_relocs *p;
5095 1.3 christos bfd_boolean dyn;
5096 1.1 christos
5097 1.1 christos if (h->root.type == bfd_link_hash_indirect)
5098 1.1 christos return TRUE;
5099 1.1 christos
5100 1.7 christos htab = ppc_elf_hash_table (info);
5101 1.7 christos eh = (struct ppc_elf_link_hash_entry *) h;
5102 1.1 christos if (eh->elf.got.refcount > 0
5103 1.1 christos || (ELIMINATE_COPY_RELOCS
5104 1.7 christos && !eh->elf.def_regular
5105 1.1 christos && eh->elf.protected_def
5106 1.9 christos && eh->has_addr16_ha
5107 1.7 christos && eh->has_addr16_lo
5108 1.7 christos && htab->params->pic_fixup > 0))
5109 1.7 christos {
5110 1.7 christos unsigned int need;
5111 1.7 christos
5112 1.1 christos /* Make sure this symbol is output as a dynamic symbol. */
5113 1.1 christos if (!ensure_undef_dynamic (info, &eh->elf))
5114 1.7 christos return FALSE;
5115 1.1 christos
5116 1.1 christos need = 0;
5117 1.1 christos if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
5118 1.1 christos {
5119 1.1 christos if (SYMBOL_REFERENCES_LOCAL (info, &eh->elf))
5120 1.9 christos /* We'll just use htab->tlsld_got.offset. This should
5121 1.9 christos always be the case. It's a little odd if we have
5122 1.9 christos a local dynamic reloc against a non-local symbol. */
5123 1.9 christos htab->tlsld_got.refcount += 1;
5124 1.7 christos else
5125 1.7 christos need += 8;
5126 1.7 christos }
5127 1.7 christos need += got_entries_needed (eh->tls_mask);
5128 1.7 christos if (need == 0)
5129 1.7 christos eh->elf.got.offset = (bfd_vma) -1;
5130 1.9 christos else
5131 1.9 christos {
5132 1.9 christos eh->elf.got.offset = allocate_got (htab, need);
5133 1.7 christos if (((bfd_link_pic (info)
5134 1.7 christos && !((eh->tls_mask & TLS_TLS) != 0
5135 1.3 christos && bfd_link_executable (info)
5136 1.7 christos && SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5137 1.7 christos || (htab->elf.dynamic_sections_created
5138 1.1 christos && eh->elf.dynindx != -1
5139 1.1 christos && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5140 1.1 christos && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
5141 1.1 christos {
5142 1.1 christos asection *rsec;
5143 1.1 christos
5144 1.7 christos need *= sizeof (Elf32_External_Rela) / 4;
5145 1.7 christos if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
5146 1.7 christos need -= sizeof (Elf32_External_Rela);
5147 1.7 christos rsec = htab->elf.srelgot;
5148 1.7 christos if (eh->elf.type == STT_GNU_IFUNC)
5149 1.7 christos rsec = htab->elf.irelplt;
5150 1.7 christos rsec->size += need;
5151 1.7 christos }
5152 1.7 christos }
5153 1.7 christos }
5154 1.7 christos else
5155 1.7 christos eh->elf.got.offset = (bfd_vma) -1;
5156 1.7 christos
5157 1.7 christos /* If no dynamic sections we can't have dynamic relocs, except for
5158 1.7 christos IFUNCs which are handled even in static executables. */
5159 1.7 christos if (!htab->elf.dynamic_sections_created
5160 1.7 christos && h->type != STT_GNU_IFUNC)
5161 1.7 christos eh->dyn_relocs = NULL;
5162 1.1 christos
5163 1.1 christos /* Discard relocs on undefined symbols that must be local. */
5164 1.1 christos else if (h->root.type == bfd_link_hash_undefined
5165 1.1 christos && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5166 1.1 christos eh->dyn_relocs = NULL;
5167 1.1 christos
5168 1.7 christos /* Also discard relocs on undefined weak syms with non-default
5169 1.1 christos visibility, or when dynamic_undefined_weak says so. */
5170 1.1 christos else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5171 1.1 christos eh->dyn_relocs = NULL;
5172 1.1 christos
5173 1.1 christos if (eh->dyn_relocs == NULL)
5174 1.1 christos ;
5175 1.1 christos
5176 1.1 christos /* In the shared -Bsymbolic case, discard space allocated for
5177 1.1 christos dynamic pc-relative relocs against symbols which turn out to be
5178 1.1 christos defined in regular objects. For the normal shared case, discard
5179 1.1 christos space for relocs that have become local due to symbol visibility
5180 1.1 christos changes. */
5181 1.1 christos else if (bfd_link_pic (info))
5182 1.1 christos {
5183 1.1 christos /* Relocs that use pc_count are those that appear on a call insn,
5184 1.1 christos or certain REL relocs (see must_be_dyn_reloc) that can be
5185 1.7 christos generated via assembly. We want calls to protected symbols to
5186 1.7 christos resolve directly to the function rather than going via the plt.
5187 1.7 christos If people want function pointer comparisons to work as expected
5188 1.7 christos then they should avoid writing weird assembly. */
5189 1.7 christos if (SYMBOL_CALLS_LOCAL (info, h))
5190 1.7 christos {
5191 1.7 christos struct elf_dyn_relocs **pp;
5192 1.7 christos
5193 1.7 christos for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5194 1.7 christos {
5195 1.7 christos p->count -= p->pc_count;
5196 1.7 christos p->pc_count = 0;
5197 1.7 christos if (p->count == 0)
5198 1.7 christos *pp = p->next;
5199 1.7 christos else
5200 1.7 christos pp = &p->next;
5201 1.7 christos }
5202 1.7 christos }
5203 1.7 christos
5204 1.7 christos if (htab->is_vxworks)
5205 1.7 christos {
5206 1.7 christos struct elf_dyn_relocs **pp;
5207 1.7 christos
5208 1.7 christos for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5209 1.7 christos {
5210 1.7 christos if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5211 1.7 christos *pp = p->next;
5212 1.7 christos else
5213 1.7 christos pp = &p->next;
5214 1.7 christos }
5215 1.7 christos }
5216 1.7 christos
5217 1.7 christos if (eh->dyn_relocs != NULL)
5218 1.7 christos {
5219 1.7 christos /* Make sure this symbol is output as a dynamic symbol. */
5220 1.7 christos if (!ensure_undef_dynamic (info, h))
5221 1.7 christos return FALSE;
5222 1.7 christos }
5223 1.7 christos }
5224 1.7 christos else if (ELIMINATE_COPY_RELOCS)
5225 1.7 christos {
5226 1.7 christos /* For the non-pic case, discard space for relocs against
5227 1.7 christos symbols which turn out to need copy relocs or are not
5228 1.7 christos dynamic. */
5229 1.7 christos if (h->dynamic_adjusted
5230 1.7 christos && !h->def_regular
5231 1.7 christos && !ELF_COMMON_DEF_P (h)
5232 1.7 christos && !(h->protected_def
5233 1.7 christos && eh->has_addr16_ha
5234 1.7 christos && eh->has_addr16_lo
5235 1.7 christos && htab->params->pic_fixup > 0))
5236 1.7 christos {
5237 1.7 christos /* Make sure this symbol is output as a dynamic symbol. */
5238 1.7 christos if (!ensure_undef_dynamic (info, h))
5239 1.7 christos return FALSE;
5240 1.7 christos
5241 1.7 christos if (h->dynindx == -1)
5242 1.7 christos eh->dyn_relocs = NULL;
5243 1.7 christos }
5244 1.7 christos else
5245 1.7 christos eh->dyn_relocs = NULL;
5246 1.7 christos }
5247 1.7 christos
5248 1.7 christos /* Allocate space. */
5249 1.7 christos for (p = eh->dyn_relocs; p != NULL; p = p->next)
5250 1.7 christos {
5251 1.7 christos asection *sreloc = elf_section_data (p->sec)->sreloc;
5252 1.7 christos if (eh->elf.type == STT_GNU_IFUNC)
5253 1.7 christos sreloc = htab->elf.irelplt;
5254 1.7 christos sreloc->size += p->count * sizeof (Elf32_External_Rela);
5255 1.7 christos }
5256 1.7 christos
5257 1.7 christos /* Handle PLT relocs. Done last, after dynindx has settled.
5258 1.7 christos We might need a PLT entry when the symbol
5259 1.7 christos a) is dynamic, or
5260 1.7 christos b) is an ifunc, or
5261 1.7 christos c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
5262 1.7 christos d) has plt16 relocs and we are linking statically. */
5263 1.7 christos dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
5264 1.7 christos if (dyn
5265 1.7 christos || h->type == STT_GNU_IFUNC
5266 1.7 christos || (h->needs_plt && h->dynamic_adjusted)
5267 1.7 christos || (h->needs_plt
5268 1.7 christos && h->def_regular
5269 1.7 christos && !htab->elf.dynamic_sections_created
5270 1.7 christos && !htab->can_convert_all_inline_plt
5271 1.7 christos && (ppc_elf_hash_entry (h)->tls_mask
5272 1.7 christos & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
5273 1.7 christos {
5274 1.7 christos struct plt_entry *ent;
5275 1.7 christos bfd_boolean doneone = FALSE;
5276 1.7 christos bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
5277 1.7 christos
5278 1.7 christos for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5279 1.7 christos if (ent->plt.refcount > 0)
5280 1.7 christos {
5281 1.7 christos asection *s = htab->elf.splt;
5282 1.7 christos
5283 1.7 christos if (!dyn)
5284 1.7 christos {
5285 1.7 christos if (h->type == STT_GNU_IFUNC)
5286 1.7 christos s = htab->elf.iplt;
5287 1.7 christos else
5288 1.7 christos s = htab->pltlocal;
5289 1.7 christos }
5290 1.7 christos
5291 1.7 christos if (htab->plt_type == PLT_NEW || !dyn)
5292 1.7 christos {
5293 1.7 christos if (!doneone)
5294 1.7 christos {
5295 1.7 christos plt_offset = s->size;
5296 1.7 christos s->size += 4;
5297 1.7 christos }
5298 1.7 christos ent->plt.offset = plt_offset;
5299 1.7 christos
5300 1.7 christos if (s == htab->pltlocal)
5301 1.7 christos ent->glink_offset = glink_offset;
5302 1.7 christos else
5303 1.7 christos {
5304 1.7 christos s = htab->glink;
5305 1.7 christos if (!doneone || bfd_link_pic (info))
5306 1.7 christos {
5307 1.7 christos glink_offset = s->size;
5308 1.7 christos s->size += GLINK_ENTRY_SIZE (htab, h);
5309 1.7 christos }
5310 1.7 christos if (!doneone
5311 1.7 christos && !bfd_link_pic (info)
5312 1.7 christos && h->def_dynamic
5313 1.7 christos && !h->def_regular)
5314 1.7 christos {
5315 1.7 christos h->root.u.def.section = s;
5316 1.7 christos h->root.u.def.value = glink_offset;
5317 1.7 christos }
5318 1.7 christos ent->glink_offset = glink_offset;
5319 1.7 christos
5320 1.7 christos if (htab->params->emit_stub_syms
5321 1.7 christos && !add_stub_sym (ent, h, info))
5322 1.7 christos return FALSE;
5323 1.7 christos }
5324 1.7 christos }
5325 1.7 christos else
5326 1.7 christos {
5327 1.7 christos if (!doneone)
5328 1.7 christos {
5329 1.7 christos /* If this is the first .plt entry, make room
5330 1.7 christos for the special first entry. */
5331 1.7 christos if (s->size == 0)
5332 1.7 christos s->size += htab->plt_initial_entry_size;
5333 1.7 christos
5334 1.7 christos /* The PowerPC PLT is actually composed of two
5335 1.7 christos parts, the first part is 2 words (for a load
5336 1.7 christos and a jump), and then there is a remaining
5337 1.7 christos word available at the end. */
5338 1.7 christos plt_offset = (htab->plt_initial_entry_size
5339 1.7 christos + (htab->plt_slot_size
5340 1.7 christos * ((s->size
5341 1.7 christos - htab->plt_initial_entry_size)
5342 1.7 christos / htab->plt_entry_size)));
5343 1.7 christos
5344 1.7 christos /* If this symbol is not defined in a regular
5345 1.1 christos file, and we are not generating a shared
5346 1.7 christos library, then set the symbol to this location
5347 1.7 christos in the .plt. This is to avoid text
5348 1.7 christos relocations, and is required to make
5349 1.7 christos function pointers compare as equal between
5350 1.7 christos the normal executable and the shared library. */
5351 1.7 christos if (! bfd_link_pic (info)
5352 1.7 christos && h->def_dynamic
5353 1.7 christos && !h->def_regular)
5354 1.7 christos {
5355 1.7 christos h->root.u.def.section = s;
5356 1.7 christos h->root.u.def.value = plt_offset;
5357 1.7 christos }
5358 1.1 christos
5359 1.7 christos /* Make room for this entry. */
5360 1.7 christos s->size += htab->plt_entry_size;
5361 1.7 christos /* After the 8192nd entry, room for two entries
5362 1.7 christos is allocated. */
5363 1.7 christos if (htab->plt_type == PLT_OLD
5364 1.7 christos && (s->size - htab->plt_initial_entry_size)
5365 1.7 christos / htab->plt_entry_size
5366 1.7 christos > PLT_NUM_SINGLE_ENTRIES)
5367 1.7 christos s->size += htab->plt_entry_size;
5368 1.7 christos }
5369 1.7 christos ent->plt.offset = plt_offset;
5370 1.7 christos }
5371 1.7 christos
5372 1.7 christos /* We also need to make an entry in the .rela.plt section. */
5373 1.7 christos if (!doneone)
5374 1.7 christos {
5375 1.7 christos if (!dyn)
5376 1.7 christos {
5377 1.7 christos if (h->type == STT_GNU_IFUNC)
5378 1.1 christos {
5379 1.7 christos s = htab->elf.irelplt;
5380 1.7 christos s->size += sizeof (Elf32_External_Rela);
5381 1.7 christos }
5382 1.7 christos else if (bfd_link_pic (info))
5383 1.7 christos {
5384 1.7 christos s = htab->relpltlocal;
5385 1.7 christos s->size += sizeof (Elf32_External_Rela);
5386 1.7 christos }
5387 1.7 christos }
5388 1.7 christos else
5389 1.7 christos {
5390 1.7 christos htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
5391 1.7 christos
5392 1.1 christos if (htab->plt_type == PLT_VXWORKS)
5393 1.7 christos {
5394 1.7 christos /* Allocate space for the unloaded relocations. */
5395 1.7 christos if (!bfd_link_pic (info)
5396 1.7 christos && htab->elf.dynamic_sections_created)
5397 1.1 christos {
5398 1.7 christos if (ent->plt.offset
5399 1.7 christos == (bfd_vma) htab->plt_initial_entry_size)
5400 1.7 christos {
5401 1.7 christos htab->srelplt2->size
5402 1.7 christos += (sizeof (Elf32_External_Rela)
5403 1.7 christos * VXWORKS_PLTRESOLVE_RELOCS);
5404 1.7 christos }
5405 1.7 christos
5406 1.7 christos htab->srelplt2->size
5407 1.7 christos += (sizeof (Elf32_External_Rela)
5408 1.1 christos * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5409 1.7 christos }
5410 1.1 christos
5411 1.7 christos /* Every PLT entry has an associated GOT entry in
5412 1.7 christos .got.plt. */
5413 1.1 christos htab->elf.sgotplt->size += 4;
5414 1.1 christos }
5415 1.7 christos }
5416 1.1 christos doneone = TRUE;
5417 1.7 christos }
5418 1.7 christos }
5419 1.1 christos else
5420 1.1 christos ent->plt.offset = (bfd_vma) -1;
5421 1.1 christos
5422 1.1 christos if (!doneone)
5423 1.1 christos {
5424 1.1 christos h->plt.plist = NULL;
5425 1.1 christos h->needs_plt = 0;
5426 1.1 christos }
5427 1.1 christos }
5428 1.7 christos else
5429 1.1 christos {
5430 1.7 christos h->plt.plist = NULL;
5431 1.7 christos h->needs_plt = 0;
5432 1.1 christos }
5433 1.1 christos
5434 1.1 christos return TRUE;
5435 1.7 christos }
5436 1.7 christos
5437 1.1 christos /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5438 1.7 christos read-only sections. */
5439 1.7 christos
5440 1.7 christos static bfd_boolean
5441 1.7 christos maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
5442 1.7 christos {
5443 1.7 christos asection *sec;
5444 1.7 christos
5445 1.7 christos if (h->root.type == bfd_link_hash_indirect)
5446 1.7 christos return TRUE;
5447 1.7 christos
5448 1.7 christos sec = readonly_dynrelocs (h);
5449 1.7 christos if (sec != NULL)
5450 1.7 christos {
5451 1.1 christos struct bfd_link_info *info = (struct bfd_link_info *) info_p;
5452 1.1 christos
5453 1.1 christos info->flags |= DF_TEXTREL;
5454 1.1 christos /* xgettext:c-format */
5455 1.1 christos info->callbacks->minfo (_("%pB: dynamic relocation against `%pT' "
5456 1.1 christos "in read-only section `%pA'\n"),
5457 1.1 christos sec->owner, h->root.root.string, sec);
5458 1.1 christos if ((info->warn_shared_textrel && bfd_link_pic (info))
5459 1.1 christos || info->error_textrel)
5460 1.1 christos /* xgettext:c-format */
5461 1.1 christos info->callbacks->einfo (_("%P: %pB: warning: relocation against `%s' "
5462 1.1 christos "in read-only section `%pA'\n"),
5463 1.1 christos sec->owner, h->root.root.string, sec);
5464 1.1 christos
5465 1.1 christos /* Not an error, just cut short the traversal. */
5466 1.1 christos return FALSE;
5467 1.1 christos }
5468 1.1 christos return TRUE;
5469 1.1 christos }
5470 1.1 christos
5471 1.1 christos static const unsigned char glink_eh_frame_cie[] =
5472 1.1 christos {
5473 1.1 christos 0, 0, 0, 16, /* length. */
5474 1.1 christos 0, 0, 0, 0, /* id. */
5475 1.3 christos 1, /* CIE version. */
5476 1.1 christos 'z', 'R', 0, /* Augmentation string. */
5477 1.1 christos 4, /* Code alignment. */
5478 1.1 christos 0x7c, /* Data alignment. */
5479 1.1 christos 65, /* RA reg. */
5480 1.1 christos 1, /* Augmentation size. */
5481 1.1 christos DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
5482 1.1 christos DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
5483 1.1 christos };
5484 1.1 christos
5485 1.1 christos /* Set the sizes of the dynamic sections. */
5486 1.1 christos
5487 1.1 christos static bfd_boolean
5488 1.1 christos ppc_elf_size_dynamic_sections (bfd *output_bfd,
5489 1.1 christos struct bfd_link_info *info)
5490 1.1 christos {
5491 1.1 christos struct ppc_elf_link_hash_table *htab;
5492 1.1 christos asection *s;
5493 1.3 christos bfd_boolean relocs;
5494 1.1 christos bfd *ibfd;
5495 1.1 christos
5496 1.1 christos #ifdef DEBUG
5497 1.1 christos fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5498 1.1 christos #endif
5499 1.1 christos
5500 1.1 christos htab = ppc_elf_hash_table (info);
5501 1.1 christos BFD_ASSERT (htab->elf.dynobj != NULL);
5502 1.1 christos
5503 1.1 christos if (elf_hash_table (info)->dynamic_sections_created)
5504 1.1 christos {
5505 1.1 christos /* Set the contents of the .interp section to the interpreter. */
5506 1.1 christos if (bfd_link_executable (info) && !info->nointerp)
5507 1.1 christos {
5508 1.1 christos s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
5509 1.3 christos BFD_ASSERT (s != NULL);
5510 1.1 christos s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5511 1.1 christos s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5512 1.1 christos }
5513 1.1 christos }
5514 1.1 christos
5515 1.1 christos if (htab->plt_type == PLT_OLD)
5516 1.1 christos htab->got_header_size = 16;
5517 1.1 christos else if (htab->plt_type == PLT_NEW)
5518 1.1 christos htab->got_header_size = 12;
5519 1.1 christos
5520 1.1 christos /* Set up .got offsets for local syms, and space for local dynamic
5521 1.1 christos relocs. */
5522 1.1 christos for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5523 1.1 christos {
5524 1.3 christos bfd_signed_vma *local_got;
5525 1.1 christos bfd_signed_vma *end_local_got;
5526 1.3 christos struct plt_entry **local_plt;
5527 1.1 christos struct plt_entry **end_local_plt;
5528 1.1 christos char *lgot_masks;
5529 1.1 christos bfd_size_type locsymcount;
5530 1.1 christos Elf_Internal_Shdr *symtab_hdr;
5531 1.1 christos
5532 1.1 christos if (!is_ppc_elf (ibfd))
5533 1.1 christos continue;
5534 1.1 christos
5535 1.1 christos for (s = ibfd->sections; s != NULL; s = s->next)
5536 1.1 christos {
5537 1.1 christos struct ppc_dyn_relocs *p;
5538 1.1 christos
5539 1.1 christos for (p = ((struct ppc_dyn_relocs *)
5540 1.1 christos elf_section_data (s)->local_dynrel);
5541 1.1 christos p != NULL;
5542 1.1 christos p = p->next)
5543 1.1 christos {
5544 1.1 christos if (!bfd_is_abs_section (p->sec)
5545 1.1 christos && bfd_is_abs_section (p->sec->output_section))
5546 1.1 christos {
5547 1.1 christos /* Input section has been discarded, either because
5548 1.1 christos it is a copy of a linkonce section or due to
5549 1.3 christos linker script /DISCARD/, so we'll be discarding
5550 1.7 christos the relocs too. */
5551 1.1 christos }
5552 1.1 christos else if (htab->is_vxworks
5553 1.1 christos && strcmp (p->sec->output_section->name,
5554 1.1 christos ".tls_vars") == 0)
5555 1.7 christos {
5556 1.7 christos /* Relocations in vxworks .tls_vars sections are
5557 1.7 christos handled specially by the loader. */
5558 1.7 christos }
5559 1.7 christos else if (p->count != 0)
5560 1.1 christos {
5561 1.1 christos asection *sreloc = elf_section_data (p->sec)->sreloc;
5562 1.1 christos if (p->ifunc)
5563 1.1 christos sreloc = htab->elf.irelplt;
5564 1.1 christos sreloc->size += p->count * sizeof (Elf32_External_Rela);
5565 1.1 christos if ((p->sec->output_section->flags
5566 1.1 christos & (SEC_READONLY | SEC_ALLOC))
5567 1.1 christos == (SEC_READONLY | SEC_ALLOC))
5568 1.1 christos {
5569 1.1 christos info->flags |= DF_TEXTREL;
5570 1.1 christos info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
5571 1.1 christos p->sec->owner, p->sec);
5572 1.1 christos }
5573 1.1 christos }
5574 1.1 christos }
5575 1.1 christos }
5576 1.1 christos
5577 1.1 christos local_got = elf_local_got_refcounts (ibfd);
5578 1.7 christos if (!local_got)
5579 1.7 christos continue;
5580 1.7 christos
5581 1.7 christos symtab_hdr = &elf_symtab_hdr (ibfd);
5582 1.1 christos locsymcount = symtab_hdr->sh_info;
5583 1.1 christos end_local_got = local_got + locsymcount;
5584 1.1 christos local_plt = (struct plt_entry **) end_local_got;
5585 1.1 christos end_local_plt = local_plt + locsymcount;
5586 1.1 christos lgot_masks = (char *) end_local_plt;
5587 1.9 christos
5588 1.9 christos for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5589 1.9 christos if (*local_got > 0)
5590 1.3 christos {
5591 1.7 christos unsigned int need;
5592 1.7 christos if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
5593 1.9 christos htab->tlsld_got.refcount += 1;
5594 1.7 christos need = got_entries_needed (*lgot_masks);
5595 1.7 christos if (need == 0)
5596 1.7 christos *local_got = (bfd_vma) -1;
5597 1.7 christos else
5598 1.3 christos {
5599 1.1 christos *local_got = allocate_got (htab, need);
5600 1.1 christos if (bfd_link_pic (info)
5601 1.1 christos && !((*lgot_masks & TLS_TLS) != 0
5602 1.1 christos && bfd_link_executable (info)))
5603 1.1 christos {
5604 1.1 christos asection *srel;
5605 1.1 christos
5606 1.1 christos need *= sizeof (Elf32_External_Rela) / 4;
5607 1.1 christos srel = htab->elf.srelgot;
5608 1.7 christos if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
5609 1.7 christos srel = htab->elf.irelplt;
5610 1.1 christos srel->size += need;
5611 1.1 christos }
5612 1.1 christos }
5613 1.7 christos }
5614 1.1 christos else
5615 1.1 christos *local_got = (bfd_vma) -1;
5616 1.1 christos
5617 1.1 christos if (htab->is_vxworks)
5618 1.7 christos continue;
5619 1.7 christos
5620 1.7 christos /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5621 1.7 christos lgot_masks = (char *) end_local_plt;
5622 1.7 christos for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
5623 1.7 christos {
5624 1.7 christos struct plt_entry *ent;
5625 1.7 christos bfd_boolean doneone = FALSE;
5626 1.7 christos bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
5627 1.7 christos
5628 1.1 christos for (ent = *local_plt; ent != NULL; ent = ent->next)
5629 1.1 christos if (ent->plt.refcount > 0)
5630 1.1 christos {
5631 1.1 christos if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
5632 1.1 christos s = htab->elf.iplt;
5633 1.1 christos else if (htab->can_convert_all_inline_plt
5634 1.1 christos || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
5635 1.1 christos {
5636 1.7 christos ent->plt.offset = (bfd_vma) -1;
5637 1.1 christos continue;
5638 1.7 christos }
5639 1.1 christos else
5640 1.7 christos s = htab->pltlocal;
5641 1.1 christos
5642 1.1 christos if (!doneone)
5643 1.1 christos {
5644 1.1 christos plt_offset = s->size;
5645 1.1 christos s->size += 4;
5646 1.7 christos }
5647 1.7 christos ent->plt.offset = plt_offset;
5648 1.7 christos
5649 1.7 christos if (s != htab->pltlocal && (!doneone || bfd_link_pic (info)))
5650 1.7 christos {
5651 1.7 christos s = htab->glink;
5652 1.7 christos glink_offset = s->size;
5653 1.7 christos s->size += GLINK_ENTRY_SIZE (htab, NULL);
5654 1.7 christos }
5655 1.7 christos ent->glink_offset = glink_offset;
5656 1.1 christos
5657 1.1 christos if (!doneone)
5658 1.1 christos {
5659 1.1 christos if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
5660 1.1 christos {
5661 1.1 christos s = htab->elf.irelplt;
5662 1.1 christos s->size += sizeof (Elf32_External_Rela);
5663 1.1 christos }
5664 1.1 christos else if (bfd_link_pic (info))
5665 1.1 christos {
5666 1.1 christos s = htab->relpltlocal;
5667 1.1 christos s->size += sizeof (Elf32_External_Rela);
5668 1.1 christos }
5669 1.1 christos doneone = TRUE;
5670 1.9 christos }
5671 1.7 christos }
5672 1.1 christos else
5673 1.1 christos ent->plt.offset = (bfd_vma) -1;
5674 1.1 christos }
5675 1.1 christos }
5676 1.7 christos
5677 1.1 christos /* Allocate space for global sym dynamic relocs. */
5678 1.1 christos elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5679 1.1 christos
5680 1.1 christos if (htab->tlsld_got.refcount > 0)
5681 1.1 christos {
5682 1.1 christos htab->tlsld_got.offset = allocate_got (htab, 8);
5683 1.1 christos if (bfd_link_dll (info))
5684 1.7 christos htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
5685 1.1 christos }
5686 1.7 christos else
5687 1.1 christos htab->tlsld_got.offset = (bfd_vma) -1;
5688 1.1 christos
5689 1.7 christos if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
5690 1.1 christos {
5691 1.1 christos unsigned int g_o_t = 32768;
5692 1.1 christos
5693 1.1 christos /* If we haven't allocated the header, do so now. When we get here,
5694 1.3 christos for old plt/got the got size will be 0 to 32764 (not allocated),
5695 1.1 christos or 32780 to 65536 (header allocated). For new plt/got, the
5696 1.1 christos corresponding ranges are 0 to 32768 and 32780 to 65536. */
5697 1.3 christos if (htab->elf.sgot->size <= 32768)
5698 1.3 christos {
5699 1.3 christos g_o_t = htab->elf.sgot->size;
5700 1.3 christos if (htab->plt_type == PLT_OLD)
5701 1.3 christos g_o_t += 4;
5702 1.3 christos htab->elf.sgot->size += htab->got_header_size;
5703 1.3 christos }
5704 1.3 christos
5705 1.3 christos htab->elf.hgot->root.u.def.value = g_o_t;
5706 1.3 christos }
5707 1.3 christos if (bfd_link_pic (info))
5708 1.3 christos {
5709 1.3 christos struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5710 1.1 christos
5711 1.1 christos sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5712 1.1 christos sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5713 1.1 christos }
5714 1.1 christos if (info->emitrelocations)
5715 1.1 christos {
5716 1.1 christos struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5717 1.1 christos
5718 1.7 christos if (sda != NULL && sda->ref_regular)
5719 1.7 christos sda->root.u.def.section->flags |= SEC_KEEP;
5720 1.1 christos sda = htab->sdata[1].sym;
5721 1.3 christos if (sda != NULL && sda->ref_regular)
5722 1.3 christos sda->root.u.def.section->flags |= SEC_KEEP;
5723 1.1 christos }
5724 1.1 christos
5725 1.3 christos if (htab->glink != NULL
5726 1.1 christos && htab->glink->size != 0
5727 1.1 christos && htab->elf.dynamic_sections_created)
5728 1.1 christos {
5729 1.1 christos htab->glink_pltresolve = htab->glink->size;
5730 1.1 christos /* Space for the branch table. */
5731 1.1 christos htab->glink->size
5732 1.1 christos += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
5733 1.1 christos /* Pad out to align the start of PLTresolve. */
5734 1.1 christos htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
5735 1.1 christos ? 63 : 15);
5736 1.1 christos htab->glink->size += GLINK_PLTRESOLVE;
5737 1.1 christos
5738 1.1 christos if (htab->params->emit_stub_syms)
5739 1.1 christos {
5740 1.1 christos struct elf_link_hash_entry *sh;
5741 1.1 christos sh = elf_link_hash_lookup (&htab->elf, "__glink",
5742 1.3 christos TRUE, FALSE, FALSE);
5743 1.1 christos if (sh == NULL)
5744 1.1 christos return FALSE;
5745 1.1 christos if (sh->root.type == bfd_link_hash_new)
5746 1.1 christos {
5747 1.1 christos sh->root.type = bfd_link_hash_defined;
5748 1.1 christos sh->root.u.def.section = htab->glink;
5749 1.1 christos sh->root.u.def.value = htab->glink_pltresolve;
5750 1.1 christos sh->ref_regular = 1;
5751 1.1 christos sh->def_regular = 1;
5752 1.1 christos sh->ref_regular_nonweak = 1;
5753 1.1 christos sh->forced_local = 1;
5754 1.1 christos sh->non_elf = 0;
5755 1.1 christos sh->root.linker_def = 1;
5756 1.1 christos }
5757 1.1 christos sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5758 1.3 christos TRUE, FALSE, FALSE);
5759 1.1 christos if (sh == NULL)
5760 1.1 christos return FALSE;
5761 1.1 christos if (sh->root.type == bfd_link_hash_new)
5762 1.1 christos {
5763 1.1 christos sh->root.type = bfd_link_hash_defined;
5764 1.1 christos sh->root.u.def.section = htab->glink;
5765 1.1 christos sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5766 1.1 christos sh->ref_regular = 1;
5767 1.1 christos sh->def_regular = 1;
5768 1.1 christos sh->ref_regular_nonweak = 1;
5769 1.1 christos sh->forced_local = 1;
5770 1.1 christos sh->non_elf = 0;
5771 1.3 christos sh->root.linker_def = 1;
5772 1.1 christos }
5773 1.1 christos }
5774 1.1 christos }
5775 1.1 christos
5776 1.1 christos if (htab->glink != NULL
5777 1.1 christos && htab->glink->size != 0
5778 1.1 christos && htab->glink_eh_frame != NULL
5779 1.1 christos && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
5780 1.1 christos && _bfd_elf_eh_frame_present (info))
5781 1.1 christos {
5782 1.1 christos s = htab->glink_eh_frame;
5783 1.1 christos s->size = sizeof (glink_eh_frame_cie) + 20;
5784 1.1 christos if (bfd_link_pic (info))
5785 1.1 christos {
5786 1.1 christos s->size += 4;
5787 1.1 christos if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
5788 1.1 christos s->size += 4;
5789 1.7 christos }
5790 1.7 christos }
5791 1.1 christos
5792 1.1 christos /* We've now determined the sizes of the various dynamic sections.
5793 1.1 christos Allocate memory for them. */
5794 1.1 christos relocs = FALSE;
5795 1.1 christos for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5796 1.1 christos {
5797 1.1 christos bfd_boolean strip_section = TRUE;
5798 1.1 christos
5799 1.1 christos if ((s->flags & SEC_LINKER_CREATED) == 0)
5800 1.7 christos continue;
5801 1.7 christos
5802 1.1 christos if (s == htab->elf.splt
5803 1.1 christos || s == htab->elf.sgot)
5804 1.7 christos {
5805 1.1 christos /* We'd like to strip these sections if they aren't needed, but if
5806 1.7 christos we've exported dynamic symbols from them we must leave them.
5807 1.7 christos It's too late to tell BFD to get rid of the symbols. */
5808 1.3 christos if (htab->elf.hplt != NULL)
5809 1.3 christos strip_section = FALSE;
5810 1.3 christos /* Strip this section if we don't need it; see the
5811 1.3 christos comment below. */
5812 1.3 christos }
5813 1.1 christos else if (s == htab->elf.iplt
5814 1.1 christos || s == htab->pltlocal
5815 1.3 christos || s == htab->glink
5816 1.1 christos || s == htab->glink_eh_frame
5817 1.9 christos || s == htab->elf.sgotplt
5818 1.1 christos || s == htab->sbss
5819 1.1 christos || s == htab->elf.sdynbss
5820 1.1 christos || s == htab->elf.sdynrelro
5821 1.1 christos || s == htab->dynsbss)
5822 1.1 christos {
5823 1.1 christos /* Strip these too. */
5824 1.1 christos }
5825 1.1 christos else if (s == htab->sdata[0].section
5826 1.1 christos || s == htab->sdata[1].section)
5827 1.1 christos {
5828 1.1 christos strip_section = (s->flags & SEC_KEEP) == 0;
5829 1.1 christos }
5830 1.1 christos else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
5831 1.1 christos {
5832 1.1 christos if (s->size != 0)
5833 1.1 christos {
5834 1.1 christos /* Remember whether there are any relocation sections. */
5835 1.1 christos relocs = TRUE;
5836 1.1 christos
5837 1.1 christos /* We use the reloc_count field as a counter if we need
5838 1.1 christos to copy relocs into the output file. */
5839 1.1 christos s->reloc_count = 0;
5840 1.1 christos }
5841 1.1 christos }
5842 1.1 christos else
5843 1.1 christos {
5844 1.1 christos /* It's not one of our sections, so don't allocate space. */
5845 1.1 christos continue;
5846 1.1 christos }
5847 1.1 christos
5848 1.1 christos if (s->size == 0 && strip_section)
5849 1.1 christos {
5850 1.1 christos /* If we don't need this section, strip it from the
5851 1.1 christos output file. This is mostly to handle .rela.bss and
5852 1.1 christos .rela.plt. We must create both sections in
5853 1.1 christos create_dynamic_sections, because they must be created
5854 1.1 christos before the linker maps input sections to output
5855 1.1 christos sections. The linker does that before
5856 1.1 christos adjust_dynamic_symbol is called, and it is that
5857 1.1 christos function which decides whether anything needs to go
5858 1.1 christos into these sections. */
5859 1.1 christos s->flags |= SEC_EXCLUDE;
5860 1.1 christos continue;
5861 1.1 christos }
5862 1.1 christos
5863 1.1 christos if ((s->flags & SEC_HAS_CONTENTS) == 0)
5864 1.1 christos continue;
5865 1.1 christos
5866 1.1 christos /* Allocate memory for the section contents. */
5867 1.1 christos s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5868 1.1 christos if (s->contents == NULL)
5869 1.3 christos return FALSE;
5870 1.1 christos }
5871 1.1 christos
5872 1.1 christos if (htab->elf.dynamic_sections_created)
5873 1.1 christos {
5874 1.1 christos /* Add some entries to the .dynamic section. We fill in the
5875 1.7 christos values later, in ppc_elf_finish_dynamic_sections, but we
5876 1.1 christos must add the entries now so that we get the correct size for
5877 1.1 christos the .dynamic section. The DT_DEBUG entry is filled in by the
5878 1.1 christos dynamic linker and used by the debugger. */
5879 1.1 christos #define add_dynamic_entry(TAG, VAL) \
5880 1.1 christos _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5881 1.1 christos
5882 1.1 christos if (bfd_link_executable (info))
5883 1.1 christos {
5884 1.3 christos if (!add_dynamic_entry (DT_DEBUG, 0))
5885 1.3 christos return FALSE;
5886 1.3 christos }
5887 1.1 christos
5888 1.1 christos if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
5889 1.1 christos {
5890 1.3 christos if (!add_dynamic_entry (DT_PLTGOT, 0)
5891 1.1 christos || !add_dynamic_entry (DT_PLTRELSZ, 0)
5892 1.1 christos || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5893 1.3 christos || !add_dynamic_entry (DT_JMPREL, 0))
5894 1.1 christos return FALSE;
5895 1.1 christos }
5896 1.1 christos
5897 1.1 christos if (htab->plt_type == PLT_NEW
5898 1.1 christos && htab->glink != NULL
5899 1.1 christos && htab->glink->size != 0)
5900 1.1 christos {
5901 1.1 christos if (!add_dynamic_entry (DT_PPC_GOT, 0))
5902 1.1 christos return FALSE;
5903 1.1 christos if (!htab->params->no_tls_get_addr_opt
5904 1.1 christos && htab->tls_get_addr != NULL
5905 1.1 christos && htab->tls_get_addr->plt.plist != NULL
5906 1.1 christos && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
5907 1.1 christos return FALSE;
5908 1.1 christos }
5909 1.1 christos
5910 1.1 christos if (relocs)
5911 1.1 christos {
5912 1.1 christos if (!add_dynamic_entry (DT_RELA, 0)
5913 1.1 christos || !add_dynamic_entry (DT_RELASZ, 0)
5914 1.1 christos || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5915 1.1 christos return FALSE;
5916 1.1 christos }
5917 1.1 christos
5918 1.1 christos /* If any dynamic relocs apply to a read-only section, then we
5919 1.1 christos need a DT_TEXTREL entry. */
5920 1.1 christos if ((info->flags & DF_TEXTREL) == 0)
5921 1.1 christos elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5922 1.1 christos info);
5923 1.1 christos
5924 1.1 christos if ((info->flags & DF_TEXTREL) != 0)
5925 1.1 christos {
5926 1.1 christos if (!add_dynamic_entry (DT_TEXTREL, 0))
5927 1.1 christos return FALSE;
5928 1.1 christos }
5929 1.1 christos if (htab->is_vxworks
5930 1.1 christos && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5931 1.1 christos return FALSE;
5932 1.1 christos }
5933 1.1 christos #undef add_dynamic_entry
5934 1.1 christos
5935 1.1 christos if (htab->glink_eh_frame != NULL
5936 1.1 christos && htab->glink_eh_frame->contents != NULL)
5937 1.1 christos {
5938 1.1 christos unsigned char *p = htab->glink_eh_frame->contents;
5939 1.1 christos bfd_vma val;
5940 1.1 christos
5941 1.1 christos memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
5942 1.1 christos /* CIE length (rewrite in case little-endian). */
5943 1.1 christos bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
5944 1.1 christos p += sizeof (glink_eh_frame_cie);
5945 1.1 christos /* FDE length. */
5946 1.1 christos val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
5947 1.1 christos bfd_put_32 (htab->elf.dynobj, val, p);
5948 1.3 christos p += 4;
5949 1.1 christos /* CIE pointer. */
5950 1.1 christos val = p - htab->glink_eh_frame->contents;
5951 1.1 christos bfd_put_32 (htab->elf.dynobj, val, p);
5952 1.1 christos p += 4;
5953 1.1 christos /* Offset to .glink. Set later. */
5954 1.1 christos p += 4;
5955 1.1 christos /* .glink size. */
5956 1.1 christos bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
5957 1.1 christos p += 4;
5958 1.1 christos /* Augmentation. */
5959 1.1 christos p += 1;
5960 1.1 christos
5961 1.1 christos if (bfd_link_pic (info)
5962 1.1 christos && htab->elf.dynamic_sections_created)
5963 1.1 christos {
5964 1.1 christos bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
5965 1.1 christos if (adv < 64)
5966 1.1 christos *p++ = DW_CFA_advance_loc + adv;
5967 1.1 christos else if (adv < 256)
5968 1.1 christos {
5969 1.1 christos *p++ = DW_CFA_advance_loc1;
5970 1.1 christos *p++ = adv;
5971 1.1 christos }
5972 1.1 christos else if (adv < 65536)
5973 1.1 christos {
5974 1.1 christos *p++ = DW_CFA_advance_loc2;
5975 1.1 christos bfd_put_16 (htab->elf.dynobj, adv, p);
5976 1.1 christos p += 2;
5977 1.1 christos }
5978 1.1 christos else
5979 1.1 christos {
5980 1.1 christos *p++ = DW_CFA_advance_loc4;
5981 1.1 christos bfd_put_32 (htab->elf.dynobj, adv, p);
5982 1.1 christos p += 4;
5983 1.1 christos }
5984 1.1 christos *p++ = DW_CFA_register;
5985 1.3 christos *p++ = 65;
5986 1.3 christos p++;
5987 1.3 christos *p++ = DW_CFA_advance_loc + 4;
5988 1.3 christos *p++ = DW_CFA_restore_extended;
5989 1.3 christos *p++ = 65;
5990 1.3 christos }
5991 1.3 christos BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
5992 1.3 christos == htab->glink_eh_frame->size);
5993 1.3 christos }
5994 1.3 christos
5995 1.3 christos return TRUE;
5996 1.3 christos }
5997 1.3 christos
5998 1.3 christos /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
5999 1.3 christos if it looks like nothing is using them. */
6000 1.3 christos
6001 1.3 christos static void
6002 1.3 christos maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6003 1.3 christos {
6004 1.3 christos struct elf_link_hash_entry *sda = lsect->sym;
6005 1.3 christos
6006 1.3 christos if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6007 1.3 christos {
6008 1.3 christos asection *s;
6009 1.3 christos
6010 1.3 christos s = bfd_get_section_by_name (output_bfd, lsect->name);
6011 1.3 christos if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6012 1.3 christos {
6013 1.3 christos s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6014 1.3 christos if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6015 1.3 christos {
6016 1.3 christos sda->def_regular = 0;
6017 1.3 christos /* This is somewhat magic. See elf_link_output_extsym. */
6018 1.3 christos sda->ref_dynamic = 1;
6019 1.3 christos sda->forced_local = 0;
6020 1.3 christos }
6021 1.3 christos }
6022 1.3 christos }
6023 1.3 christos }
6024 1.3 christos
6025 1.1 christos void
6026 1.1 christos ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6027 1.1 christos {
6028 1.1 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6029 1.1 christos
6030 1.1 christos if (htab != NULL)
6031 1.1 christos {
6032 1.1 christos maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6033 1.1 christos maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6034 1.1 christos }
6035 1.1 christos }
6036 1.1 christos
6037 1.1 christos
6038 1.1 christos /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6039 1.1 christos
6040 1.1 christos static bfd_boolean
6041 1.1 christos ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6042 1.1 christos {
6043 1.1 christos if (h->plt.plist != NULL
6044 1.1 christos && !h->def_regular
6045 1.1 christos && (!h->pointer_equality_needed
6046 1.1 christos || !h->ref_regular_nonweak))
6047 1.1 christos return FALSE;
6048 1.1 christos
6049 1.3 christos return _bfd_elf_hash_symbol (h);
6050 1.1 christos }
6051 1.1 christos
6052 1.1 christos #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6054 1.1 christos
6055 1.1 christos /* Relaxation trampolines. r12 is available for clobbering (r11, is
6056 1.1 christos used for some functions that are allowed to break the ABI). */
6057 1.1 christos static const int shared_stub_entry[] =
6058 1.1 christos {
6059 1.1 christos 0x7c0802a6, /* mflr 0 */
6060 1.1 christos 0x429f0005, /* bcl 20, 31, .Lxxx */
6061 1.1 christos 0x7d8802a6, /* mflr 12 */
6062 1.1 christos 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6063 1.3 christos 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6064 1.3 christos 0x7c0803a6, /* mtlr 0 */
6065 1.3 christos 0x7d8903a6, /* mtctr 12 */
6066 1.3 christos 0x4e800420, /* bctr */
6067 1.3 christos };
6068 1.3 christos
6069 1.3 christos static const int stub_entry[] =
6070 1.3 christos {
6071 1.3 christos 0x3d800000, /* lis 12,xxx@ha */
6072 1.3 christos 0x398c0000, /* addi 12,12,xxx@l */
6073 1.3 christos 0x7d8903a6, /* mtctr 12 */
6074 1.1 christos 0x4e800420, /* bctr */
6075 1.1 christos };
6076 1.1 christos
6077 1.1 christos struct ppc_elf_relax_info
6078 1.1 christos {
6079 1.1 christos unsigned int workaround_size;
6080 1.3 christos unsigned int picfixup_size;
6081 1.1 christos };
6082 1.3 christos
6083 1.1 christos /* This function implements long branch trampolines, and the ppc476
6084 1.1 christos icache bug workaround. Any section needing trampolines or patch
6085 1.1 christos space for the workaround has its size extended so that we can
6086 1.1 christos add trampolines at the end of the section. */
6087 1.1 christos
6088 1.1 christos static bfd_boolean
6089 1.1 christos ppc_elf_relax_section (bfd *abfd,
6090 1.1 christos asection *isec,
6091 1.1 christos struct bfd_link_info *link_info,
6092 1.1 christos bfd_boolean *again)
6093 1.1 christos {
6094 1.3 christos struct one_branch_fixup
6095 1.3 christos {
6096 1.3 christos struct one_branch_fixup *next;
6097 1.1 christos asection *tsec;
6098 1.3 christos /* Final link, can use the symbol offset. For a
6099 1.1 christos relocatable link we use the symbol's index. */
6100 1.3 christos bfd_vma toff;
6101 1.1 christos bfd_vma trampoff;
6102 1.1 christos };
6103 1.1 christos
6104 1.1 christos Elf_Internal_Shdr *symtab_hdr;
6105 1.1 christos bfd_byte *contents = NULL;
6106 1.3 christos Elf_Internal_Sym *isymbuf = NULL;
6107 1.1 christos Elf_Internal_Rela *internal_relocs = NULL;
6108 1.1 christos Elf_Internal_Rela *irel, *irelend = NULL;
6109 1.3 christos struct one_branch_fixup *branch_fixups = NULL;
6110 1.3 christos struct ppc_elf_relax_info *relax_info = NULL;
6111 1.1 christos unsigned changes = 0;
6112 1.1 christos bfd_boolean workaround_change;
6113 1.1 christos struct ppc_elf_link_hash_table *htab;
6114 1.1 christos bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6115 1.1 christos asection *got2;
6116 1.3 christos bfd_boolean maybe_pasted;
6117 1.3 christos
6118 1.3 christos *again = FALSE;
6119 1.3 christos
6120 1.3 christos /* No need to do anything with non-alloc or non-code sections. */
6121 1.3 christos if ((isec->flags & SEC_ALLOC) == 0
6122 1.3 christos || (isec->flags & SEC_CODE) == 0
6123 1.3 christos || (isec->flags & SEC_LINKER_CREATED) != 0
6124 1.3 christos || isec->size < 4)
6125 1.3 christos return TRUE;
6126 1.3 christos
6127 1.3 christos /* We cannot represent the required PIC relocs in the output, so don't
6128 1.3 christos do anything. The linker doesn't support mixing -shared and -r
6129 1.3 christos anyway. */
6130 1.3 christos if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6131 1.3 christos return TRUE;
6132 1.3 christos
6133 1.3 christos htab = ppc_elf_hash_table (link_info);
6134 1.3 christos if (htab == NULL)
6135 1.3 christos return TRUE;
6136 1.3 christos
6137 1.3 christos isec->size = (isec->size + 3) & -4;
6138 1.3 christos if (isec->rawsize == 0)
6139 1.3 christos isec->rawsize = isec->size;
6140 1.3 christos trampbase = isec->size;
6141 1.3 christos
6142 1.3 christos BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6143 1.3 christos || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6144 1.3 christos isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6145 1.1 christos
6146 1.1 christos if (htab->params->ppc476_workaround
6147 1.1 christos || htab->params->pic_fixup > 0)
6148 1.1 christos {
6149 1.3 christos if (elf_section_data (isec)->sec_info == NULL)
6150 1.3 christos {
6151 1.1 christos elf_section_data (isec)->sec_info
6152 1.1 christos = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6153 1.1 christos if (elf_section_data (isec)->sec_info == NULL)
6154 1.3 christos return FALSE;
6155 1.3 christos }
6156 1.3 christos relax_info = elf_section_data (isec)->sec_info;
6157 1.3 christos trampbase -= relax_info->workaround_size;
6158 1.3 christos }
6159 1.3 christos
6160 1.3 christos maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6161 1.3 christos || strcmp (isec->output_section->name, ".fini") == 0);
6162 1.3 christos /* Space for a branch around any trampolines. */
6163 1.3 christos trampoff = trampbase;
6164 1.3 christos if (maybe_pasted && trampbase == isec->rawsize)
6165 1.3 christos trampoff += 4;
6166 1.1 christos
6167 1.3 christos symtab_hdr = &elf_symtab_hdr (abfd);
6168 1.1 christos picfixup_size = 0;
6169 1.3 christos if (htab->params->branch_trampolines
6170 1.3 christos || htab->params->pic_fixup > 0)
6171 1.1 christos {
6172 1.3 christos /* Get a copy of the native relocations. */
6173 1.3 christos if (isec->reloc_count != 0)
6174 1.3 christos {
6175 1.3 christos internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6176 1.3 christos link_info->keep_memory);
6177 1.3 christos if (internal_relocs == NULL)
6178 1.3 christos goto error_return;
6179 1.3 christos }
6180 1.3 christos
6181 1.7 christos got2 = bfd_get_section_by_name (abfd, ".got2");
6182 1.3 christos
6183 1.3 christos irelend = internal_relocs + isec->reloc_count;
6184 1.3 christos for (irel = internal_relocs; irel < irelend; irel++)
6185 1.3 christos {
6186 1.3 christos unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6187 1.3 christos bfd_vma toff, roff;
6188 1.3 christos asection *tsec;
6189 1.3 christos struct one_branch_fixup *f;
6190 1.7 christos size_t insn_offset = 0;
6191 1.3 christos bfd_vma max_branch_offset = 0, val;
6192 1.3 christos bfd_byte *hit_addr;
6193 1.1 christos unsigned long t0;
6194 1.3 christos struct elf_link_hash_entry *h;
6195 1.3 christos Elf_Internal_Sym *isym;
6196 1.3 christos struct plt_entry **plist;
6197 1.3 christos unsigned char sym_type;
6198 1.3 christos
6199 1.1 christos switch (r_type)
6200 1.3 christos {
6201 1.3 christos case R_PPC_REL24:
6202 1.3 christos case R_PPC_LOCAL24PC:
6203 1.3 christos case R_PPC_PLTREL24:
6204 1.1 christos case R_PPC_PLTCALL:
6205 1.3 christos max_branch_offset = 1 << 25;
6206 1.3 christos break;
6207 1.3 christos
6208 1.1 christos case R_PPC_REL14:
6209 1.3 christos case R_PPC_REL14_BRTAKEN:
6210 1.7 christos case R_PPC_REL14_BRNTAKEN:
6211 1.7 christos max_branch_offset = 1 << 15;
6212 1.7 christos break;
6213 1.7 christos
6214 1.7 christos case R_PPC_ADDR16_HA:
6215 1.1 christos if (htab->params->pic_fixup > 0)
6216 1.7 christos break;
6217 1.7 christos continue;
6218 1.3 christos
6219 1.3 christos default:
6220 1.9 christos continue;
6221 1.9 christos }
6222 1.3 christos
6223 1.3 christos /* Get the value of the symbol referred to by the reloc. */
6224 1.3 christos if (!get_sym_h (&h, &isym, &tsec, NULL, &isymbuf,
6225 1.1 christos ELF32_R_SYM (irel->r_info), abfd))
6226 1.1 christos goto error_return;
6227 1.3 christos
6228 1.7 christos if (isym != NULL)
6229 1.7 christos {
6230 1.3 christos if (tsec != NULL)
6231 1.3 christos ;
6232 1.3 christos else if (isym->st_shndx == SHN_ABS)
6233 1.7 christos tsec = bfd_abs_section_ptr;
6234 1.7 christos else
6235 1.7 christos continue;
6236 1.3 christos
6237 1.3 christos toff = isym->st_value;
6238 1.3 christos sym_type = ELF_ST_TYPE (isym->st_info);
6239 1.3 christos }
6240 1.3 christos else
6241 1.3 christos {
6242 1.3 christos if (tsec != NULL)
6243 1.3 christos toff = h->root.u.def.value;
6244 1.3 christos else if (h->root.type == bfd_link_hash_undefined
6245 1.3 christos || h->root.type == bfd_link_hash_undefweak)
6246 1.3 christos {
6247 1.3 christos unsigned long indx;
6248 1.3 christos
6249 1.3 christos indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6250 1.3 christos tsec = bfd_und_section_ptr;
6251 1.3 christos toff = bfd_link_relocatable (link_info) ? indx : 0;
6252 1.3 christos }
6253 1.3 christos else
6254 1.3 christos continue;
6255 1.3 christos
6256 1.3 christos /* If this branch is to __tls_get_addr then we may later
6257 1.3 christos optimise away the call. We won't be needing a long-
6258 1.3 christos branch stub in that case. */
6259 1.3 christos if (bfd_link_executable (link_info)
6260 1.3 christos && h == htab->tls_get_addr
6261 1.3 christos && irel != internal_relocs)
6262 1.3 christos {
6263 1.3 christos unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6264 1.3 christos unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6265 1.3 christos unsigned int tls_mask = 0;
6266 1.3 christos
6267 1.3 christos /* The previous reloc should be one of R_PPC_TLSGD or
6268 1.3 christos R_PPC_TLSLD, or for older object files, a reloc
6269 1.3 christos on the __tls_get_addr arg setup insn. Get tls
6270 1.3 christos mask bits from the symbol on that reloc. */
6271 1.3 christos if (t_symndx < symtab_hdr->sh_info)
6272 1.3 christos {
6273 1.3 christos bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6274 1.3 christos
6275 1.3 christos if (local_got_offsets != NULL)
6276 1.3 christos {
6277 1.3 christos struct plt_entry **local_plt = (struct plt_entry **)
6278 1.1 christos (local_got_offsets + symtab_hdr->sh_info);
6279 1.3 christos char *lgot_masks = (char *)
6280 1.3 christos (local_plt + symtab_hdr->sh_info);
6281 1.3 christos tls_mask = lgot_masks[t_symndx];
6282 1.1 christos }
6283 1.3 christos }
6284 1.3 christos else
6285 1.3 christos {
6286 1.3 christos struct elf_link_hash_entry *th
6287 1.3 christos = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6288 1.3 christos
6289 1.3 christos while (th->root.type == bfd_link_hash_indirect
6290 1.3 christos || th->root.type == bfd_link_hash_warning)
6291 1.3 christos th = (struct elf_link_hash_entry *) th->root.u.i.link;
6292 1.3 christos
6293 1.3 christos tls_mask
6294 1.3 christos = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6295 1.3 christos }
6296 1.1 christos
6297 1.3 christos /* The mask bits tell us if the call will be
6298 1.3 christos optimised away. */
6299 1.1 christos if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6300 1.3 christos && (t_rtype == R_PPC_TLSGD
6301 1.1 christos || t_rtype == R_PPC_GOT_TLSGD16
6302 1.3 christos || t_rtype == R_PPC_GOT_TLSGD16_LO))
6303 1.3 christos continue;
6304 1.3 christos if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6305 1.3 christos && (t_rtype == R_PPC_TLSLD
6306 1.3 christos || t_rtype == R_PPC_GOT_TLSLD16
6307 1.3 christos || t_rtype == R_PPC_GOT_TLSLD16_LO))
6308 1.3 christos continue;
6309 1.1 christos }
6310 1.3 christos
6311 1.3 christos sym_type = h->type;
6312 1.3 christos }
6313 1.3 christos
6314 1.3 christos if (r_type == R_PPC_ADDR16_HA)
6315 1.3 christos {
6316 1.3 christos if (h != NULL
6317 1.1 christos && !h->def_regular
6318 1.3 christos && h->protected_def
6319 1.3 christos && ppc_elf_hash_entry (h)->has_addr16_ha
6320 1.3 christos && ppc_elf_hash_entry (h)->has_addr16_lo)
6321 1.3 christos picfixup_size += 12;
6322 1.3 christos continue;
6323 1.3 christos }
6324 1.3 christos
6325 1.3 christos /* The condition here under which we call find_plt_ent must
6326 1.3 christos match that in relocate_section. If we call find_plt_ent here
6327 1.3 christos but not in relocate_section, or vice versa, then the branch
6328 1.3 christos destination used here may be incorrect. */
6329 1.3 christos plist = NULL;
6330 1.1 christos if (h != NULL)
6331 1.3 christos {
6332 1.3 christos /* We know is_branch_reloc (r_type) is true. */
6333 1.3 christos if (h->type == STT_GNU_IFUNC
6334 1.3 christos || r_type == R_PPC_PLTREL24)
6335 1.1 christos plist = &h->plt.plist;
6336 1.3 christos }
6337 1.3 christos else if (sym_type == STT_GNU_IFUNC
6338 1.3 christos && elf_local_got_offsets (abfd) != NULL)
6339 1.3 christos {
6340 1.1 christos bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6341 1.3 christos struct plt_entry **local_plt = (struct plt_entry **)
6342 1.3 christos (local_got_offsets + symtab_hdr->sh_info);
6343 1.3 christos plist = local_plt + ELF32_R_SYM (irel->r_info);
6344 1.3 christos }
6345 1.3 christos if (plist != NULL)
6346 1.3 christos {
6347 1.3 christos bfd_vma addend = 0;
6348 1.3 christos struct plt_entry *ent;
6349 1.3 christos
6350 1.3 christos if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
6351 1.7 christos addend = irel->r_addend;
6352 1.3 christos ent = find_plt_ent (plist, got2, addend);
6353 1.3 christos if (ent != NULL)
6354 1.1 christos {
6355 1.1 christos if (htab->plt_type == PLT_NEW
6356 1.1 christos || h == NULL
6357 1.3 christos || !htab->elf.dynamic_sections_created
6358 1.3 christos || h->dynindx == -1)
6359 1.3 christos {
6360 1.3 christos tsec = htab->glink;
6361 1.3 christos toff = ent->glink_offset;
6362 1.3 christos }
6363 1.9 christos else
6364 1.9 christos {
6365 1.9 christos tsec = htab->elf.splt;
6366 1.9 christos toff = ent->plt.offset;
6367 1.9 christos }
6368 1.9 christos }
6369 1.9 christos }
6370 1.9 christos
6371 1.9 christos /* If the branch and target are in the same section, you have
6372 1.9 christos no hope of adding stubs. We'll error out later should the
6373 1.9 christos branch overflow. */
6374 1.3 christos if (tsec == isec)
6375 1.3 christos continue;
6376 1.3 christos
6377 1.3 christos /* toff is used for the symbol index when the symbol is
6378 1.3 christos undefined and we're doing a relocatable link, so we can't
6379 1.3 christos support addends. It would be possible to do so by
6380 1.3 christos putting the addend in one_branch_fixup but addends on
6381 1.3 christos branches are rare so it hardly seems worth supporting. */
6382 1.3 christos if (bfd_link_relocatable (link_info)
6383 1.3 christos && tsec == bfd_und_section_ptr
6384 1.3 christos && r_type != R_PPC_PLTREL24
6385 1.3 christos && irel->r_addend != 0)
6386 1.3 christos continue;
6387 1.3 christos
6388 1.3 christos /* There probably isn't any reason to handle symbols in
6389 1.3 christos SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6390 1.3 christos attribute for a code section, and we are only looking at
6391 1.3 christos branches. However, implement it correctly here as a
6392 1.3 christos reference for other target relax_section functions. */
6393 1.3 christos if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6394 1.3 christos {
6395 1.3 christos /* At this stage in linking, no SEC_MERGE symbol has been
6396 1.3 christos adjusted, so all references to such symbols need to be
6397 1.9 christos passed through _bfd_merged_section_offset. (Later, in
6398 1.9 christos relocate_section, all SEC_MERGE symbols *except* for
6399 1.3 christos section symbols have been adjusted.)
6400 1.3 christos
6401 1.3 christos gas may reduce relocations against symbols in SEC_MERGE
6402 1.3 christos sections to a relocation against the section symbol when
6403 1.3 christos the original addend was zero. When the reloc is against
6404 1.3 christos a section symbol we should include the addend in the
6405 1.1 christos offset passed to _bfd_merged_section_offset, since the
6406 1.9 christos location of interest is the original symbol. On the
6407 1.9 christos other hand, an access to "sym+addend" where "sym" is not
6408 1.3 christos a section symbol should not include the addend; Such an
6409 1.3 christos access is presumed to be an offset from "sym"; The
6410 1.3 christos location of interest is just "sym". */
6411 1.3 christos if (sym_type == STT_SECTION
6412 1.1 christos && r_type != R_PPC_PLTREL24)
6413 1.1 christos toff += irel->r_addend;
6414 1.3 christos
6415 1.3 christos toff
6416 1.3 christos = _bfd_merged_section_offset (abfd, &tsec,
6417 1.3 christos elf_section_data (tsec)->sec_info,
6418 1.3 christos toff);
6419 1.3 christos
6420 1.3 christos if (sym_type != STT_SECTION
6421 1.1 christos && r_type != R_PPC_PLTREL24)
6422 1.3 christos toff += irel->r_addend;
6423 1.1 christos }
6424 1.9 christos /* PLTREL24 addends are special. */
6425 1.9 christos else if (r_type != R_PPC_PLTREL24)
6426 1.9 christos toff += irel->r_addend;
6427 1.9 christos
6428 1.9 christos /* Attempted -shared link of non-pic code loses. */
6429 1.9 christos if ((!bfd_link_relocatable (link_info)
6430 1.9 christos && tsec == bfd_und_section_ptr)
6431 1.9 christos || tsec->output_section == NULL
6432 1.9 christos || (tsec->owner != NULL
6433 1.9 christos && (tsec->owner->flags & BFD_PLUGIN) != 0))
6434 1.3 christos continue;
6435 1.3 christos
6436 1.3 christos roff = irel->r_offset;
6437 1.3 christos
6438 1.3 christos /* Avoid creating a lot of unnecessary fixups when
6439 1.3 christos relocatable if the output section size is such that a
6440 1.3 christos fixup can be created at final link.
6441 1.3 christos The max_branch_offset adjustment allows for some number
6442 1.3 christos of other fixups being needed at final link. */
6443 1.3 christos if (bfd_link_relocatable (link_info)
6444 1.3 christos && (isec->output_section->rawsize - (isec->output_offset + roff)
6445 1.3 christos < max_branch_offset - (max_branch_offset >> 4)))
6446 1.3 christos continue;
6447 1.3 christos
6448 1.3 christos /* If the branch is in range, no need to do anything. */
6449 1.1 christos if (tsec != bfd_und_section_ptr
6450 1.3 christos && (!bfd_link_relocatable (link_info)
6451 1.3 christos /* A relocatable link may have sections moved during
6452 1.3 christos final link, so do not presume they remain in range. */
6453 1.3 christos || tsec->output_section == isec->output_section))
6454 1.1 christos {
6455 1.3 christos bfd_vma symaddr, reladdr;
6456 1.3 christos
6457 1.3 christos symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6458 1.3 christos reladdr = isec->output_section->vma + isec->output_offset + roff;
6459 1.1 christos if (symaddr - reladdr + max_branch_offset
6460 1.3 christos < 2 * max_branch_offset)
6461 1.3 christos continue;
6462 1.3 christos }
6463 1.3 christos
6464 1.3 christos /* Look for an existing fixup to this address. */
6465 1.1 christos for (f = branch_fixups; f ; f = f->next)
6466 1.3 christos if (f->tsec == tsec && f->toff == toff)
6467 1.3 christos break;
6468 1.3 christos
6469 1.3 christos if (f == NULL)
6470 1.3 christos {
6471 1.3 christos size_t size;
6472 1.3 christos unsigned long stub_rtype;
6473 1.3 christos
6474 1.3 christos val = trampoff - roff;
6475 1.3 christos if (val >= max_branch_offset)
6476 1.3 christos /* Oh dear, we can't reach a trampoline. Don't try to add
6477 1.7 christos one. We'll report an error later. */
6478 1.3 christos continue;
6479 1.3 christos
6480 1.3 christos if (bfd_link_pic (link_info))
6481 1.3 christos {
6482 1.3 christos size = 4 * ARRAY_SIZE (shared_stub_entry);
6483 1.3 christos insn_offset = 12;
6484 1.1 christos }
6485 1.3 christos else
6486 1.3 christos {
6487 1.3 christos size = 4 * ARRAY_SIZE (stub_entry);
6488 1.3 christos insn_offset = 0;
6489 1.3 christos }
6490 1.3 christos stub_rtype = R_PPC_RELAX;
6491 1.3 christos if (tsec == htab->elf.splt
6492 1.3 christos || tsec == htab->glink)
6493 1.3 christos {
6494 1.3 christos stub_rtype = R_PPC_RELAX_PLT;
6495 1.3 christos if (r_type == R_PPC_PLTREL24)
6496 1.3 christos stub_rtype = R_PPC_RELAX_PLTREL24;
6497 1.3 christos }
6498 1.3 christos
6499 1.3 christos /* Hijack the old relocation. Since we need two
6500 1.3 christos relocations for this use a "composite" reloc. */
6501 1.1 christos irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6502 1.3 christos stub_rtype);
6503 1.3 christos irel->r_offset = trampoff + insn_offset;
6504 1.1 christos if (r_type == R_PPC_PLTREL24
6505 1.1 christos && stub_rtype != R_PPC_RELAX_PLTREL24)
6506 1.1 christos irel->r_addend = 0;
6507 1.3 christos
6508 1.3 christos /* Record the fixup so we don't do it again this section. */
6509 1.3 christos f = bfd_malloc (sizeof (*f));
6510 1.3 christos f->next = branch_fixups;
6511 1.3 christos f->tsec = tsec;
6512 1.3 christos f->toff = toff;
6513 1.1 christos f->trampoff = trampoff;
6514 1.1 christos branch_fixups = f;
6515 1.3 christos
6516 1.3 christos trampoff += size;
6517 1.1 christos changes++;
6518 1.3 christos }
6519 1.3 christos else
6520 1.3 christos {
6521 1.1 christos val = f->trampoff - roff;
6522 1.3 christos if (val >= max_branch_offset)
6523 1.1 christos continue;
6524 1.1 christos
6525 1.1 christos /* Nop out the reloc, since we're finalizing things here. */
6526 1.3 christos irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6527 1.3 christos }
6528 1.3 christos
6529 1.3 christos /* Get the section contents. */
6530 1.3 christos if (contents == NULL)
6531 1.3 christos {
6532 1.3 christos /* Get cached copy if it exists. */
6533 1.3 christos if (elf_section_data (isec)->this_hdr.contents != NULL)
6534 1.3 christos contents = elf_section_data (isec)->this_hdr.contents;
6535 1.3 christos /* Go get them off disk. */
6536 1.3 christos else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6537 1.3 christos goto error_return;
6538 1.1 christos }
6539 1.3 christos
6540 1.3 christos /* Fix up the existing branch to hit the trampoline. */
6541 1.3 christos hit_addr = contents + roff;
6542 1.3 christos switch (r_type)
6543 1.3 christos {
6544 1.3 christos case R_PPC_REL24:
6545 1.3 christos case R_PPC_LOCAL24PC:
6546 1.3 christos case R_PPC_PLTREL24:
6547 1.3 christos t0 = bfd_get_32 (abfd, hit_addr);
6548 1.1 christos t0 &= ~0x3fffffc;
6549 1.1 christos t0 |= val & 0x3fffffc;
6550 1.3 christos bfd_put_32 (abfd, t0, hit_addr);
6551 1.1 christos break;
6552 1.3 christos
6553 1.3 christos case R_PPC_REL14:
6554 1.1 christos case R_PPC_REL14_BRTAKEN:
6555 1.1 christos case R_PPC_REL14_BRNTAKEN:
6556 1.3 christos t0 = bfd_get_32 (abfd, hit_addr);
6557 1.1 christos t0 &= ~0xfffc;
6558 1.3 christos t0 |= val & 0xfffc;
6559 1.3 christos bfd_put_32 (abfd, t0, hit_addr);
6560 1.3 christos break;
6561 1.3 christos }
6562 1.3 christos }
6563 1.3 christos
6564 1.3 christos while (branch_fixups != NULL)
6565 1.3 christos {
6566 1.3 christos struct one_branch_fixup *f = branch_fixups;
6567 1.1 christos branch_fixups = branch_fixups->next;
6568 1.3 christos free (f);
6569 1.3 christos }
6570 1.3 christos }
6571 1.3 christos
6572 1.3 christos workaround_change = FALSE;
6573 1.1 christos newsize = trampoff;
6574 1.3 christos if (htab->params->ppc476_workaround
6575 1.3 christos && (!bfd_link_relocatable (link_info)
6576 1.3 christos || isec->output_section->alignment_power >= htab->params->pagesize_p2))
6577 1.3 christos {
6578 1.3 christos bfd_vma addr, end_addr;
6579 1.3 christos unsigned int crossings;
6580 1.3 christos bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
6581 1.3 christos
6582 1.3 christos addr = isec->output_section->vma + isec->output_offset;
6583 1.3 christos end_addr = addr + trampoff;
6584 1.3 christos addr &= -pagesize;
6585 1.3 christos crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
6586 1.1 christos if (crossings != 0)
6587 1.3 christos {
6588 1.3 christos /* Keep space aligned, to ensure the patch code itself does
6589 1.1 christos not cross a page. Don't decrease size calculated on a
6590 1.3 christos previous pass as otherwise we might never settle on a layout. */
6591 1.3 christos newsize = 15 - ((end_addr - 1) & 15);
6592 1.3 christos newsize += crossings * 16;
6593 1.3 christos if (relax_info->workaround_size < newsize)
6594 1.3 christos {
6595 1.3 christos relax_info->workaround_size = newsize;
6596 1.3 christos workaround_change = TRUE;
6597 1.1 christos }
6598 1.3 christos /* Ensure relocate_section is called. */
6599 1.3 christos isec->flags |= SEC_RELOC;
6600 1.1 christos }
6601 1.1 christos newsize = trampoff + relax_info->workaround_size;
6602 1.1 christos }
6603 1.1 christos
6604 1.1 christos if (htab->params->pic_fixup > 0)
6605 1.1 christos {
6606 1.1 christos picfixup_size -= relax_info->picfixup_size;
6607 1.1 christos if (picfixup_size != 0)
6608 1.1 christos relax_info->picfixup_size += picfixup_size;
6609 1.1 christos newsize += relax_info->picfixup_size;
6610 1.1 christos }
6611 1.1 christos
6612 1.1 christos if (changes != 0 || picfixup_size != 0 || workaround_change)
6613 1.1 christos isec->size = newsize;
6614 1.1 christos
6615 1.1 christos if (isymbuf != NULL
6616 1.1 christos && symtab_hdr->contents != (unsigned char *) isymbuf)
6617 1.1 christos {
6618 1.1 christos if (! link_info->keep_memory)
6619 1.1 christos free (isymbuf);
6620 1.1 christos else
6621 1.1 christos {
6622 1.1 christos /* Cache the symbols for elf_link_input_bfd. */
6623 1.1 christos symtab_hdr->contents = (unsigned char *) isymbuf;
6624 1.1 christos }
6625 1.3 christos }
6626 1.1 christos
6627 1.1 christos if (contents != NULL
6628 1.1 christos && elf_section_data (isec)->this_hdr.contents != contents)
6629 1.1 christos {
6630 1.1 christos if (!changes && !link_info->keep_memory)
6631 1.1 christos free (contents);
6632 1.1 christos else
6633 1.1 christos {
6634 1.1 christos /* Cache the section contents for elf_link_input_bfd. */
6635 1.1 christos elf_section_data (isec)->this_hdr.contents = contents;
6636 1.1 christos }
6637 1.1 christos }
6638 1.1 christos
6639 1.1 christos changes += picfixup_size;
6640 1.1 christos if (changes != 0)
6641 1.1 christos {
6642 1.1 christos /* Append sufficient NOP relocs so we can write out relocation
6643 1.1 christos information for the trampolines. */
6644 1.1 christos Elf_Internal_Shdr *rel_hdr;
6645 1.1 christos Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6646 1.1 christos * sizeof (*new_relocs));
6647 1.1 christos unsigned ix;
6648 1.1 christos
6649 1.1 christos if (!new_relocs)
6650 1.1 christos goto error_return;
6651 1.1 christos memcpy (new_relocs, internal_relocs,
6652 1.3 christos isec->reloc_count * sizeof (*new_relocs));
6653 1.3 christos for (ix = changes; ix--;)
6654 1.1 christos {
6655 1.1 christos irel = new_relocs + ix + isec->reloc_count;
6656 1.3 christos
6657 1.1 christos irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6658 1.1 christos }
6659 1.1 christos if (internal_relocs != elf_section_data (isec)->relocs)
6660 1.3 christos free (internal_relocs);
6661 1.3 christos elf_section_data (isec)->relocs = new_relocs;
6662 1.3 christos isec->reloc_count += changes;
6663 1.3 christos rel_hdr = _bfd_elf_single_rel_hdr (isec);
6664 1.3 christos rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
6665 1.3 christos }
6666 1.1 christos else if (internal_relocs != NULL
6667 1.1 christos && elf_section_data (isec)->relocs != internal_relocs)
6668 1.1 christos free (internal_relocs);
6669 1.1 christos
6670 1.1 christos *again = changes != 0 || workaround_change;
6671 1.1 christos return TRUE;
6672 1.1 christos
6673 1.1 christos error_return:
6674 1.1 christos while (branch_fixups != NULL)
6675 1.1 christos {
6676 1.1 christos struct one_branch_fixup *f = branch_fixups;
6677 1.1 christos branch_fixups = branch_fixups->next;
6678 1.1 christos free (f);
6679 1.1 christos }
6680 1.1 christos if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6681 1.1 christos free (isymbuf);
6682 1.1 christos if (contents != NULL
6683 1.1 christos && elf_section_data (isec)->this_hdr.contents != contents)
6684 1.1 christos free (contents);
6685 1.1 christos if (internal_relocs != NULL
6686 1.1 christos && elf_section_data (isec)->relocs != internal_relocs)
6687 1.1 christos free (internal_relocs);
6688 1.1 christos return FALSE;
6689 1.1 christos }
6690 1.1 christos
6691 1.1 christos /* What to do when ld finds relocations against symbols defined in
6693 1.1 christos discarded sections. */
6694 1.1 christos
6695 1.1 christos static unsigned int
6696 1.1 christos ppc_elf_action_discarded (asection *sec)
6697 1.1 christos {
6698 1.1 christos if (strcmp (".fixup", sec->name) == 0)
6699 1.1 christos return 0;
6700 1.1 christos
6701 1.1 christos if (strcmp (".got2", sec->name) == 0)
6702 1.1 christos return 0;
6703 1.1 christos
6704 1.1 christos return _bfd_elf_default_action_discarded (sec);
6705 1.1 christos }
6706 1.1 christos
6707 1.1 christos /* Fill in the address for a pointer generated in a linker section. */
6709 1.1 christos
6710 1.1 christos static bfd_vma
6711 1.1 christos elf_finish_pointer_linker_section (bfd *input_bfd,
6712 1.1 christos elf_linker_section_t *lsect,
6713 1.1 christos struct elf_link_hash_entry *h,
6714 1.1 christos bfd_vma relocation,
6715 1.1 christos const Elf_Internal_Rela *rel)
6716 1.1 christos {
6717 1.1 christos elf_linker_section_pointers_t *linker_section_ptr;
6718 1.1 christos
6719 1.1 christos BFD_ASSERT (lsect != NULL);
6720 1.1 christos
6721 1.1 christos if (h != NULL)
6722 1.1 christos {
6723 1.1 christos /* Handle global symbol. */
6724 1.1 christos struct ppc_elf_link_hash_entry *eh;
6725 1.1 christos
6726 1.1 christos eh = (struct ppc_elf_link_hash_entry *) h;
6727 1.1 christos BFD_ASSERT (eh->elf.def_regular);
6728 1.1 christos linker_section_ptr = eh->linker_section_pointer;
6729 1.1 christos }
6730 1.1 christos else
6731 1.1 christos {
6732 1.1 christos /* Handle local symbol. */
6733 1.1 christos unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6734 1.1 christos
6735 1.1 christos BFD_ASSERT (is_ppc_elf (input_bfd));
6736 1.1 christos BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6737 1.1 christos linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6738 1.1 christos }
6739 1.1 christos
6740 1.1 christos linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6741 1.1 christos rel->r_addend,
6742 1.1 christos lsect);
6743 1.1 christos BFD_ASSERT (linker_section_ptr != NULL);
6744 1.1 christos
6745 1.1 christos /* Offset will always be a multiple of four, so use the bottom bit
6746 1.1 christos as a "written" flag. */
6747 1.1 christos if ((linker_section_ptr->offset & 1) == 0)
6748 1.1 christos {
6749 1.1 christos bfd_put_32 (lsect->section->owner,
6750 1.1 christos relocation + linker_section_ptr->addend,
6751 1.1 christos lsect->section->contents + linker_section_ptr->offset);
6752 1.1 christos linker_section_ptr->offset += 1;
6753 1.1 christos }
6754 1.1 christos
6755 1.1 christos relocation = (lsect->section->output_section->vma
6756 1.1 christos + lsect->section->output_offset
6757 1.1 christos + linker_section_ptr->offset - 1
6758 1.7 christos - SYM_VAL (lsect->sym));
6759 1.7 christos
6760 1.1 christos #ifdef DEBUG
6761 1.1 christos fprintf (stderr,
6762 1.1 christos "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6763 1.1 christos lsect->name, (long) relocation, (long) relocation);
6764 1.1 christos #endif
6765 1.7 christos
6766 1.7 christos return relocation;
6767 1.7 christos }
6768 1.7 christos
6769 1.7 christos #define PPC_LO(v) ((v) & 0xffff)
6770 1.7 christos #define PPC_HI(v) (((v) >> 16) & 0xffff)
6771 1.7 christos #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6772 1.7 christos
6773 1.7 christos static void
6774 1.7 christos write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
6775 1.7 christos asection *plt_sec, unsigned char *p,
6776 1.7 christos struct bfd_link_info *info)
6777 1.7 christos {
6778 1.7 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6779 1.7 christos bfd *output_bfd = info->output_bfd;
6780 1.7 christos bfd_vma plt;
6781 1.7 christos unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
6782 1.7 christos
6783 1.7 christos if (h != NULL
6784 1.7 christos && h == htab->tls_get_addr
6785 1.7 christos && !htab->params->no_tls_get_addr_opt)
6786 1.7 christos {
6787 1.7 christos bfd_put_32 (output_bfd, LWZ_11_3, p);
6788 1.1 christos p += 4;
6789 1.1 christos bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
6790 1.1 christos p += 4;
6791 1.1 christos bfd_put_32 (output_bfd, MR_0_3, p);
6792 1.1 christos p += 4;
6793 1.3 christos bfd_put_32 (output_bfd, CMPWI_11_0, p);
6794 1.1 christos p += 4;
6795 1.1 christos bfd_put_32 (output_bfd, ADD_3_12_2, p);
6796 1.1 christos p += 4;
6797 1.1 christos bfd_put_32 (output_bfd, BEQLR, p);
6798 1.1 christos p += 4;
6799 1.1 christos bfd_put_32 (output_bfd, MR_3_0, p);
6800 1.1 christos p += 4;
6801 1.1 christos bfd_put_32 (output_bfd, NOP, p);
6802 1.1 christos p += 4;
6803 1.1 christos }
6804 1.1 christos
6805 1.1 christos plt = ((ent->plt.offset & ~1)
6806 1.1 christos + plt_sec->output_section->vma
6807 1.7 christos + plt_sec->output_offset);
6808 1.1 christos
6809 1.1 christos if (bfd_link_pic (info))
6810 1.1 christos {
6811 1.1 christos bfd_vma got = 0;
6812 1.1 christos
6813 1.1 christos if (ent->addend >= 32768)
6814 1.1 christos got = (ent->addend
6815 1.1 christos + ent->sec->output_section->vma
6816 1.1 christos + ent->sec->output_offset);
6817 1.1 christos else if (htab->elf.hgot != NULL)
6818 1.1 christos got = SYM_VAL (htab->elf.hgot);
6819 1.1 christos
6820 1.7 christos plt -= got;
6821 1.7 christos
6822 1.7 christos if (plt + 0x8000 < 0x10000)
6823 1.7 christos bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6824 1.7 christos else
6825 1.7 christos {
6826 1.7 christos bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6827 1.7 christos p += 4;
6828 1.7 christos bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6829 1.1 christos }
6830 1.1 christos }
6831 1.1 christos else
6832 1.1 christos {
6833 1.1 christos bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6834 1.1 christos p += 4;
6835 1.1 christos bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6836 1.1 christos }
6837 1.1 christos p += 4;
6838 1.1 christos bfd_put_32 (output_bfd, MTCTR_11, p);
6839 1.1 christos p += 4;
6840 1.1 christos bfd_put_32 (output_bfd, BCTR, p);
6841 1.1 christos p += 4;
6842 1.1 christos while (p < end)
6843 1.1 christos {
6844 1.1 christos bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
6845 1.1 christos p += 4;
6846 1.1 christos }
6847 1.1 christos }
6848 1.1 christos
6849 1.1 christos /* Return true if symbol is defined statically. */
6850 1.1 christos
6851 1.1 christos static bfd_boolean
6852 1.1 christos is_static_defined (struct elf_link_hash_entry *h)
6853 1.9 christos {
6854 1.1 christos return ((h->root.type == bfd_link_hash_defined
6855 1.1 christos || h->root.type == bfd_link_hash_defweak)
6856 1.1 christos && h->root.u.def.section != NULL
6857 1.1 christos && h->root.u.def.section->output_section != NULL);
6858 1.1 christos }
6859 1.1 christos
6860 1.1 christos /* If INSN is an opcode that may be used with an @tls operand, return
6861 1.1 christos the transformed insn for TLS optimisation, otherwise return 0. If
6862 1.1 christos REG is non-zero only match an insn with RB or RA equal to REG. */
6863 1.1 christos
6864 1.1 christos unsigned int
6865 1.1 christos _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6866 1.1 christos {
6867 1.1 christos unsigned int rtra;
6868 1.1 christos
6869 1.1 christos if ((insn & (0x3fu << 26)) != 31 << 26)
6870 1.1 christos return 0;
6871 1.9 christos
6872 1.1 christos if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6873 1.1 christos rtra = insn & ((1 << 26) - (1 << 16));
6874 1.9 christos else if (((insn >> 16) & 0x1f) == reg)
6875 1.1 christos rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6876 1.1 christos else
6877 1.9 christos return 0;
6878 1.1 christos
6879 1.1 christos if ((insn & (0x3ff << 1)) == 266 << 1)
6880 1.1 christos /* add -> addi. */
6881 1.1 christos insn = 14 << 26;
6882 1.1 christos else if ((insn & (0x1f << 1)) == 23 << 1
6883 1.1 christos && ((insn & (0x1f << 6)) < 14 << 6
6884 1.1 christos || ((insn & (0x1f << 6)) >= 16 << 6
6885 1.1 christos && (insn & (0x1f << 6)) < 24 << 6)))
6886 1.1 christos /* load and store indexed -> dform. */
6887 1.1 christos insn = (32u | ((insn >> 6) & 0x1f)) << 26;
6888 1.1 christos else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6889 1.1 christos /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6890 1.1 christos insn = ((58u | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6891 1.1 christos else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6892 1.9 christos /* lwax -> lwa. */
6893 1.9 christos insn = (58u << 26) | 2;
6894 1.9 christos else
6895 1.9 christos return 0;
6896 1.9 christos insn |= rtra;
6897 1.9 christos return insn;
6898 1.9 christos }
6899 1.9 christos
6900 1.9 christos /* If INSN is an opcode that may be used with an @tprel operand, return
6901 1.9 christos the transformed insn for an undefined weak symbol, ie. with the
6902 1.9 christos thread pointer REG operand removed. Otherwise return 0. */
6903 1.9 christos
6904 1.9 christos unsigned int
6905 1.9 christos _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
6906 1.9 christos {
6907 1.9 christos if ((insn & (0x1f << 16)) == reg << 16
6908 1.1 christos && ((insn & (0x3fu << 26)) == 14u << 26 /* addi */
6909 1.9 christos || (insn & (0x3fu << 26)) == 15u << 26 /* addis */
6910 1.1 christos || (insn & (0x3fu << 26)) == 32u << 26 /* lwz */
6911 1.1 christos || (insn & (0x3fu << 26)) == 34u << 26 /* lbz */
6912 1.1 christos || (insn & (0x3fu << 26)) == 36u << 26 /* stw */
6913 1.1 christos || (insn & (0x3fu << 26)) == 38u << 26 /* stb */
6914 1.1 christos || (insn & (0x3fu << 26)) == 40u << 26 /* lhz */
6915 1.9 christos || (insn & (0x3fu << 26)) == 42u << 26 /* lha */
6916 1.9 christos || (insn & (0x3fu << 26)) == 44u << 26 /* sth */
6917 1.9 christos || (insn & (0x3fu << 26)) == 46u << 26 /* lmw */
6918 1.1 christos || (insn & (0x3fu << 26)) == 47u << 26 /* stmw */
6919 1.1 christos || (insn & (0x3fu << 26)) == 48u << 26 /* lfs */
6920 1.1 christos || (insn & (0x3fu << 26)) == 50u << 26 /* lfd */
6921 1.9 christos || (insn & (0x3fu << 26)) == 52u << 26 /* stfs */
6922 1.1 christos || (insn & (0x3fu << 26)) == 54u << 26 /* stfd */
6923 1.1 christos || ((insn & (0x3fu << 26)) == 58u << 26 /* lwa,ld,lmd */
6924 1.1 christos && (insn & 3) != 1)
6925 1.1 christos || ((insn & (0x3fu << 26)) == 62u << 26 /* std, stmd */
6926 1.1 christos && ((insn & 3) == 0 || (insn & 3) == 3))))
6927 1.1 christos {
6928 1.1 christos insn &= ~(0x1f << 16);
6929 1.1 christos }
6930 1.1 christos else if ((insn & (0x1f << 21)) == reg << 21
6931 1.1 christos && ((insn & (0x3eu << 26)) == 24u << 26 /* ori, oris */
6932 1.9 christos || (insn & (0x3eu << 26)) == 26u << 26 /* xori,xoris */
6933 1.9 christos || (insn & (0x3eu << 26)) == 28u << 26 /* andi,andis */))
6934 1.9 christos {
6935 1.9 christos insn &= ~(0x1f << 21);
6936 1.1 christos insn |= (insn & (0x1f << 16)) << 5;
6937 1.1 christos if ((insn & (0x3eu << 26)) == 26u << 26 /* xori,xoris */)
6938 1.1 christos insn -= 2 >> 26; /* convert to ori,oris */
6939 1.1 christos }
6940 1.1 christos else
6941 1.9 christos insn = 0;
6942 1.9 christos return insn;
6943 1.3 christos }
6944 1.1 christos
6945 1.1 christos static bfd_boolean
6946 1.1 christos is_insn_ds_form (unsigned int insn)
6947 1.1 christos {
6948 1.1 christos return ((insn & (0x3fu << 26)) == 58u << 26 /* ld,ldu,lwa */
6949 1.1 christos || (insn & (0x3fu << 26)) == 62u << 26 /* std,stdu,stq */
6950 1.1 christos || (insn & (0x3fu << 26)) == 57u << 26 /* lfdp */
6951 1.1 christos || (insn & (0x3fu << 26)) == 61u << 26 /* stfdp */);
6952 1.1 christos }
6953 1.1 christos
6954 1.1 christos static bfd_boolean
6955 1.1 christos is_insn_dq_form (unsigned int insn)
6956 1.1 christos {
6957 1.1 christos return ((insn & (0x3fu << 26)) == 56u << 26 /* lq */
6958 1.1 christos || ((insn & (0x3fu << 26)) == (61u << 26) /* lxv, stxv */
6959 1.1 christos && (insn & 3) == 1));
6960 1.1 christos }
6961 1.1 christos
6962 1.1 christos /* The RELOCATE_SECTION function is called by the ELF backend linker
6963 1.1 christos to handle the relocations for a section.
6964 1.1 christos
6965 1.1 christos The relocs are always passed as Rela structures; if the section
6966 1.1 christos actually uses Rel structures, the r_addend field will always be
6967 1.1 christos zero.
6968 1.1 christos
6969 1.1 christos This function is responsible for adjust the section contents as
6970 1.1 christos necessary, and (if using Rela relocs and generating a
6971 1.1 christos relocatable output file) adjusting the reloc addend as
6972 1.1 christos necessary.
6973 1.1 christos
6974 1.1 christos This function does not have to worry about setting the reloc
6975 1.1 christos address or the reloc symbol index.
6976 1.1 christos
6977 1.1 christos LOCAL_SYMS is a pointer to the swapped in local symbols.
6978 1.1 christos
6979 1.1 christos LOCAL_SECTIONS is an array giving the section in the input file
6980 1.1 christos corresponding to the st_shndx field of each local symbol.
6981 1.1 christos
6982 1.1 christos The global hash table entry for the global symbols can be found
6983 1.1 christos via elf_sym_hashes (input_bfd).
6984 1.1 christos
6985 1.1 christos When generating relocatable output, this function must handle
6986 1.1 christos STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6987 1.1 christos going to be the section symbol corresponding to the output
6988 1.1 christos section, which means that the addend must be adjusted
6989 1.3 christos accordingly. */
6990 1.1 christos
6991 1.1 christos static bfd_boolean
6992 1.3 christos ppc_elf_relocate_section (bfd *output_bfd,
6993 1.1 christos struct bfd_link_info *info,
6994 1.1 christos bfd *input_bfd,
6995 1.7 christos asection *input_section,
6996 1.1 christos bfd_byte *contents,
6997 1.3 christos Elf_Internal_Rela *relocs,
6998 1.3 christos Elf_Internal_Sym *local_syms,
6999 1.1 christos asection **local_sections)
7000 1.1 christos {
7001 1.7 christos Elf_Internal_Shdr *symtab_hdr;
7002 1.1 christos struct elf_link_hash_entry **sym_hashes;
7003 1.1 christos struct ppc_elf_link_hash_table *htab;
7004 1.1 christos Elf_Internal_Rela *rel;
7005 1.3 christos Elf_Internal_Rela *wrel;
7006 1.1 christos Elf_Internal_Rela *relend;
7007 1.1 christos Elf_Internal_Rela outrel;
7008 1.9 christos asection *got2;
7009 1.9 christos bfd_vma *local_got_offsets;
7010 1.9 christos bfd_boolean ret = TRUE;
7011 1.9 christos bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7012 1.9 christos bfd_boolean is_vxworks_tls;
7013 1.9 christos unsigned int picfixup_size = 0;
7014 1.1 christos struct ppc_elf_relax_info *relax_info = NULL;
7015 1.1 christos
7016 1.1 christos #ifdef DEBUG
7017 1.1 christos _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
7018 1.1 christos "%ld relocations%s",
7019 1.1 christos input_bfd, input_section,
7020 1.1 christos (long) input_section->reloc_count,
7021 1.1 christos (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7022 1.1 christos #endif
7023 1.1 christos
7024 1.1 christos if (!is_ppc_elf (input_bfd))
7025 1.1 christos {
7026 1.3 christos bfd_set_error (bfd_error_wrong_format);
7027 1.1 christos return FALSE;
7028 1.1 christos }
7029 1.3 christos
7030 1.3 christos got2 = bfd_get_section_by_name (input_bfd, ".got2");
7031 1.3 christos
7032 1.1 christos /* Initialize howto table if not already done. */
7033 1.3 christos if (!ppc_elf_howto_table[R_PPC_ADDR32])
7034 1.1 christos ppc_elf_howto_init ();
7035 1.1 christos
7036 1.1 christos htab = ppc_elf_hash_table (info);
7037 1.1 christos local_got_offsets = elf_local_got_offsets (input_bfd);
7038 1.1 christos symtab_hdr = &elf_symtab_hdr (input_bfd);
7039 1.1 christos sym_hashes = elf_sym_hashes (input_bfd);
7040 1.1 christos /* We have to handle relocations in vxworks .tls_vars sections
7041 1.1 christos specially, because the dynamic loader is 'weird'. */
7042 1.1 christos is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7043 1.1 christos && !strcmp (input_section->output_section->name,
7044 1.1 christos ".tls_vars"));
7045 1.1 christos if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7046 1.7 christos relax_info = elf_section_data (input_section)->sec_info;
7047 1.1 christos rel = wrel = relocs;
7048 1.1 christos relend = relocs + input_section->reloc_count;
7049 1.7 christos for (; rel < relend; wrel++, rel++)
7050 1.3 christos {
7051 1.1 christos enum elf_ppc_reloc_type r_type;
7052 1.3 christos bfd_vma addend;
7053 1.1 christos bfd_reloc_status_type r;
7054 1.1 christos Elf_Internal_Sym *sym;
7055 1.1 christos asection *sec;
7056 1.1 christos struct elf_link_hash_entry *h;
7057 1.1 christos const char *sym_name;
7058 1.1 christos reloc_howto_type *howto;
7059 1.1 christos unsigned long r_symndx;
7060 1.1 christos bfd_vma relocation;
7061 1.1 christos bfd_vma branch_bit, from;
7062 1.1 christos bfd_boolean unresolved_reloc, save_unresolved_reloc;
7063 1.1 christos bfd_boolean warned;
7064 1.1 christos unsigned int tls_type, tls_mask, tls_gd;
7065 1.1 christos struct plt_entry **ifunc, **plt_list;
7066 1.1 christos struct reloc_howto_struct alt_howto;
7067 1.1 christos
7068 1.1 christos again:
7069 1.1 christos r_type = ELF32_R_TYPE (rel->r_info);
7070 1.1 christos sym = NULL;
7071 1.3 christos sec = NULL;
7072 1.3 christos h = NULL;
7073 1.1 christos unresolved_reloc = FALSE;
7074 1.1 christos warned = FALSE;
7075 1.1 christos r_symndx = ELF32_R_SYM (rel->r_info);
7076 1.3 christos
7077 1.1 christos if (r_symndx < symtab_hdr->sh_info)
7078 1.1 christos {
7079 1.1 christos sym = local_syms + r_symndx;
7080 1.1 christos sec = local_sections[r_symndx];
7081 1.1 christos sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7082 1.1 christos
7083 1.1 christos relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7084 1.1 christos }
7085 1.1 christos else
7086 1.1 christos {
7087 1.1 christos bfd_boolean ignored;
7088 1.1 christos
7089 1.3 christos RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7090 1.3 christos r_symndx, symtab_hdr, sym_hashes,
7091 1.9 christos h, sec, relocation,
7092 1.3 christos unresolved_reloc, warned, ignored);
7093 1.3 christos
7094 1.3 christos sym_name = h->root.root.string;
7095 1.3 christos }
7096 1.3 christos
7097 1.7 christos if (sec != NULL && discarded_section (sec))
7098 1.3 christos {
7099 1.3 christos /* For relocs against symbols from removed linkonce sections,
7100 1.3 christos or sections discarded by a linker script, we just want the
7101 1.3 christos section contents zeroed. Avoid any special processing. */
7102 1.3 christos howto = NULL;
7103 1.3 christos if (r_type < R_PPC_max)
7104 1.3 christos howto = ppc_elf_howto_table[r_type];
7105 1.1 christos
7106 1.1 christos _bfd_clear_contents (howto, input_bfd, input_section,
7107 1.3 christos contents, rel->r_offset);
7108 1.1 christos wrel->r_offset = rel->r_offset;
7109 1.1 christos wrel->r_info = 0;
7110 1.1 christos wrel->r_addend = 0;
7111 1.1 christos
7112 1.1 christos /* For ld -r, remove relocations in debug sections against
7113 1.1 christos symbols defined in discarded sections. Not done for
7114 1.1 christos non-debug to preserve relocs in .eh_frame which the
7115 1.1 christos eh_frame editing code expects to be present. */
7116 1.1 christos if (bfd_link_relocatable (info)
7117 1.3 christos && (input_section->flags & SEC_DEBUGGING))
7118 1.3 christos wrel--;
7119 1.3 christos
7120 1.3 christos continue;
7121 1.1 christos }
7122 1.1 christos
7123 1.1 christos if (bfd_link_relocatable (info))
7124 1.1 christos {
7125 1.1 christos if (got2 != NULL
7126 1.1 christos && r_type == R_PPC_PLTREL24
7127 1.1 christos && rel->r_addend != 0)
7128 1.1 christos {
7129 1.1 christos /* R_PPC_PLTREL24 is rather special. If non-zero, the
7130 1.1 christos addend specifies the GOT pointer offset within .got2. */
7131 1.1 christos rel->r_addend += got2->output_offset;
7132 1.1 christos }
7133 1.1 christos if (r_type != R_PPC_RELAX_PLT
7134 1.1 christos && r_type != R_PPC_RELAX_PLTREL24
7135 1.1 christos && r_type != R_PPC_RELAX)
7136 1.1 christos goto copy_reloc;
7137 1.1 christos }
7138 1.1 christos
7139 1.1 christos /* TLS optimizations. Replace instruction sequences and relocs
7140 1.1 christos based on information we collected in tls_optimize. We edit
7141 1.1 christos RELOCS so that --emit-relocs will output something sensible
7142 1.1 christos for the final instruction stream. */
7143 1.1 christos tls_mask = 0;
7144 1.1 christos tls_gd = 0;
7145 1.1 christos if (h != NULL)
7146 1.1 christos tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7147 1.1 christos else if (local_got_offsets != NULL)
7148 1.1 christos {
7149 1.1 christos struct plt_entry **local_plt;
7150 1.1 christos char *lgot_masks;
7151 1.1 christos local_plt
7152 1.1 christos = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7153 1.1 christos lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7154 1.1 christos tls_mask = lgot_masks[r_symndx];
7155 1.1 christos }
7156 1.1 christos
7157 1.1 christos /* Ensure reloc mapping code below stays sane. */
7158 1.1 christos if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7159 1.1 christos || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7160 1.1 christos || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7161 1.1 christos || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7162 1.1 christos || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7163 1.7 christos || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7164 1.3 christos || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7165 1.1 christos || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7166 1.1 christos abort ();
7167 1.7 christos switch (r_type)
7168 1.3 christos {
7169 1.1 christos default:
7170 1.1 christos break;
7171 1.1 christos
7172 1.1 christos case R_PPC_GOT_TPREL16:
7173 1.1 christos case R_PPC_GOT_TPREL16_LO:
7174 1.1 christos if ((tls_mask & TLS_TLS) != 0
7175 1.1 christos && (tls_mask & TLS_TPREL) == 0)
7176 1.1 christos {
7177 1.1 christos bfd_vma insn;
7178 1.1 christos
7179 1.1 christos insn = bfd_get_32 (input_bfd,
7180 1.7 christos contents + rel->r_offset - d_offset);
7181 1.1 christos insn &= 31 << 21;
7182 1.1 christos insn |= 0x3c020000; /* addis 0,2,0 */
7183 1.1 christos bfd_put_32 (input_bfd, insn,
7184 1.7 christos contents + rel->r_offset - d_offset);
7185 1.1 christos r_type = R_PPC_TPREL16_HA;
7186 1.1 christos rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7187 1.1 christos }
7188 1.1 christos break;
7189 1.1 christos
7190 1.1 christos case R_PPC_TLS:
7191 1.1 christos if ((tls_mask & TLS_TLS) != 0
7192 1.1 christos && (tls_mask & TLS_TPREL) == 0)
7193 1.1 christos {
7194 1.1 christos bfd_vma insn;
7195 1.1 christos
7196 1.9 christos insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7197 1.1 christos insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7198 1.1 christos if (insn == 0)
7199 1.1 christos abort ();
7200 1.1 christos bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7201 1.1 christos r_type = R_PPC_TPREL16_LO;
7202 1.1 christos rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7203 1.1 christos
7204 1.1 christos /* Was PPC_TLS which sits on insn boundary, now
7205 1.1 christos PPC_TPREL16_LO which is at low-order half-word. */
7206 1.1 christos rel->r_offset += d_offset;
7207 1.1 christos }
7208 1.1 christos break;
7209 1.1 christos
7210 1.1 christos case R_PPC_GOT_TLSGD16_HI:
7211 1.3 christos case R_PPC_GOT_TLSGD16_HA:
7212 1.7 christos tls_gd = TLS_GDIE;
7213 1.1 christos if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7214 1.1 christos goto tls_gdld_hi;
7215 1.1 christos break;
7216 1.1 christos
7217 1.1 christos case R_PPC_GOT_TLSLD16_HI:
7218 1.1 christos case R_PPC_GOT_TLSLD16_HA:
7219 1.1 christos if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7220 1.1 christos {
7221 1.9 christos tls_gdld_hi:
7222 1.1 christos if ((tls_mask & tls_gd) != 0)
7223 1.1 christos r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7224 1.1 christos + R_PPC_GOT_TPREL16);
7225 1.1 christos else
7226 1.1 christos {
7227 1.1 christos rel->r_offset -= d_offset;
7228 1.1 christos bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7229 1.1 christos r_type = R_PPC_NONE;
7230 1.1 christos }
7231 1.1 christos rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7232 1.1 christos }
7233 1.1 christos break;
7234 1.1 christos
7235 1.1 christos case R_PPC_GOT_TLSGD16:
7236 1.1 christos case R_PPC_GOT_TLSGD16_LO:
7237 1.1 christos tls_gd = TLS_GDIE;
7238 1.1 christos if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7239 1.1 christos goto tls_ldgd_opt;
7240 1.9 christos break;
7241 1.1 christos
7242 1.1 christos case R_PPC_GOT_TLSLD16:
7243 1.1 christos case R_PPC_GOT_TLSLD16_LO:
7244 1.1 christos if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7245 1.3 christos {
7246 1.3 christos unsigned int insn1, insn2;
7247 1.3 christos bfd_vma offset;
7248 1.3 christos
7249 1.7 christos tls_ldgd_opt:
7250 1.3 christos offset = (bfd_vma) -1;
7251 1.1 christos /* If not using the newer R_PPC_TLSGD/LD to mark
7252 1.1 christos __tls_get_addr calls, we must trust that the call
7253 1.1 christos stays with its arg setup insns, ie. that the next
7254 1.3 christos reloc is the __tls_get_addr call associated with
7255 1.9 christos the current reloc. Edit both insns. */
7256 1.1 christos if (input_section->nomark_tls_get_addr
7257 1.1 christos && rel + 1 < relend
7258 1.1 christos && branch_reloc_hash_match (input_bfd, rel + 1,
7259 1.1 christos htab->tls_get_addr))
7260 1.7 christos offset = rel[1].r_offset;
7261 1.1 christos /* We read the low GOT_TLS insn because we need to keep
7262 1.1 christos the destination reg. It may be something other than
7263 1.1 christos the usual r3, and moved to r3 before the call by
7264 1.1 christos intervening code. */
7265 1.1 christos insn1 = bfd_get_32 (input_bfd,
7266 1.1 christos contents + rel->r_offset - d_offset);
7267 1.1 christos if ((tls_mask & tls_gd) != 0)
7268 1.1 christos {
7269 1.3 christos /* IE */
7270 1.3 christos insn1 &= (0x1f << 21) | (0x1f << 16);
7271 1.1 christos insn1 |= 32u << 26; /* lwz */
7272 1.1 christos if (offset != (bfd_vma) -1)
7273 1.1 christos {
7274 1.1 christos rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7275 1.1 christos insn2 = 0x7c631214; /* add 3,3,2 */
7276 1.1 christos bfd_put_32 (input_bfd, insn2, contents + offset);
7277 1.1 christos }
7278 1.1 christos r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7279 1.1 christos + R_PPC_GOT_TPREL16);
7280 1.1 christos rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7281 1.1 christos }
7282 1.1 christos else
7283 1.1 christos {
7284 1.1 christos /* LE */
7285 1.1 christos insn1 &= 0x1f << 21;
7286 1.1 christos insn1 |= 0x3c020000; /* addis r,2,0 */
7287 1.1 christos if (tls_gd == 0)
7288 1.1 christos {
7289 1.1 christos /* Was an LD reloc. */
7290 1.1 christos for (r_symndx = 0;
7291 1.1 christos r_symndx < symtab_hdr->sh_info;
7292 1.1 christos r_symndx++)
7293 1.1 christos if (local_sections[r_symndx] == sec)
7294 1.1 christos break;
7295 1.7 christos if (r_symndx >= symtab_hdr->sh_info)
7296 1.1 christos r_symndx = STN_UNDEF;
7297 1.1 christos rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7298 1.7 christos if (r_symndx != STN_UNDEF)
7299 1.1 christos rel->r_addend -= (local_syms[r_symndx].st_value
7300 1.1 christos + sec->output_offset
7301 1.1 christos + sec->output_section->vma);
7302 1.1 christos }
7303 1.1 christos r_type = R_PPC_TPREL16_HA;
7304 1.3 christos rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7305 1.1 christos if (offset != (bfd_vma) -1)
7306 1.1 christos {
7307 1.1 christos rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7308 1.1 christos rel[1].r_offset = offset + d_offset;
7309 1.1 christos rel[1].r_addend = rel->r_addend;
7310 1.7 christos insn2 = 0x38630000; /* addi 3,3,0 */
7311 1.7 christos bfd_put_32 (input_bfd, insn2, contents + offset);
7312 1.1 christos }
7313 1.1 christos }
7314 1.1 christos bfd_put_32 (input_bfd, insn1,
7315 1.1 christos contents + rel->r_offset - d_offset);
7316 1.7 christos if (tls_gd == 0)
7317 1.7 christos {
7318 1.7 christos /* We changed the symbol on an LD reloc. Start over
7319 1.7 christos in order to get h, sym, sec etc. right. */
7320 1.7 christos goto again;
7321 1.7 christos }
7322 1.7 christos }
7323 1.9 christos break;
7324 1.1 christos
7325 1.1 christos case R_PPC_TLSGD:
7326 1.1 christos if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7327 1.1 christos && rel + 1 < relend)
7328 1.1 christos {
7329 1.1 christos unsigned int insn2;
7330 1.1 christos bfd_vma offset = rel->r_offset;
7331 1.1 christos
7332 1.1 christos if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
7333 1.1 christos {
7334 1.1 christos bfd_put_32 (input_bfd, NOP, contents + offset);
7335 1.1 christos rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7336 1.1 christos break;
7337 1.7 christos }
7338 1.1 christos
7339 1.1 christos if ((tls_mask & TLS_GDIE) != 0)
7340 1.1 christos {
7341 1.1 christos /* IE */
7342 1.1 christos r_type = R_PPC_NONE;
7343 1.1 christos insn2 = 0x7c631214; /* add 3,3,2 */
7344 1.1 christos }
7345 1.7 christos else
7346 1.7 christos {
7347 1.1 christos /* LE */
7348 1.1 christos r_type = R_PPC_TPREL16_LO;
7349 1.1 christos rel->r_offset += d_offset;
7350 1.7 christos insn2 = 0x38630000; /* addi 3,3,0 */
7351 1.7 christos }
7352 1.7 christos rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7353 1.7 christos bfd_put_32 (input_bfd, insn2, contents + offset);
7354 1.7 christos /* Zap the reloc on the _tls_get_addr call too. */
7355 1.7 christos BFD_ASSERT (offset == rel[1].r_offset);
7356 1.7 christos rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7357 1.1 christos }
7358 1.1 christos break;
7359 1.1 christos
7360 1.1 christos case R_PPC_TLSLD:
7361 1.1 christos if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7362 1.1 christos && rel + 1 < relend)
7363 1.1 christos {
7364 1.1 christos unsigned int insn2;
7365 1.1 christos
7366 1.1 christos if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
7367 1.1 christos {
7368 1.1 christos bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7369 1.1 christos rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7370 1.1 christos break;
7371 1.1 christos }
7372 1.1 christos
7373 1.7 christos for (r_symndx = 0;
7374 1.1 christos r_symndx < symtab_hdr->sh_info;
7375 1.1 christos r_symndx++)
7376 1.1 christos if (local_sections[r_symndx] == sec)
7377 1.1 christos break;
7378 1.3 christos if (r_symndx >= symtab_hdr->sh_info)
7379 1.1 christos r_symndx = STN_UNDEF;
7380 1.1 christos rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7381 1.1 christos if (r_symndx != STN_UNDEF)
7382 1.1 christos rel->r_addend -= (local_syms[r_symndx].st_value
7383 1.1 christos + sec->output_offset
7384 1.1 christos + sec->output_section->vma);
7385 1.1 christos
7386 1.1 christos rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7387 1.1 christos rel->r_offset += d_offset;
7388 1.1 christos insn2 = 0x38630000; /* addi 3,3,0 */
7389 1.1 christos bfd_put_32 (input_bfd, insn2,
7390 1.1 christos contents + rel->r_offset - d_offset);
7391 1.1 christos /* Zap the reloc on the _tls_get_addr call too. */
7392 1.1 christos BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7393 1.1 christos rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7394 1.7 christos goto again;
7395 1.1 christos }
7396 1.1 christos break;
7397 1.1 christos }
7398 1.1 christos
7399 1.1 christos /* Handle other relocations that tweak non-addend part of insn. */
7400 1.7 christos branch_bit = 0;
7401 1.1 christos switch (r_type)
7402 1.7 christos {
7403 1.1 christos default:
7404 1.1 christos break;
7405 1.1 christos
7406 1.1 christos /* Branch taken prediction relocations. */
7407 1.1 christos case R_PPC_ADDR14_BRTAKEN:
7408 1.1 christos case R_PPC_REL14_BRTAKEN:
7409 1.1 christos branch_bit = BRANCH_PREDICT_BIT;
7410 1.1 christos /* Fall through. */
7411 1.1 christos
7412 1.1 christos /* Branch not taken prediction relocations. */
7413 1.1 christos case R_PPC_ADDR14_BRNTAKEN:
7414 1.7 christos case R_PPC_REL14_BRNTAKEN:
7415 1.7 christos {
7416 1.7 christos unsigned int insn;
7417 1.7 christos
7418 1.7 christos insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7419 1.7 christos insn &= ~BRANCH_PREDICT_BIT;
7420 1.7 christos insn |= branch_bit;
7421 1.7 christos
7422 1.7 christos from = (rel->r_offset
7423 1.7 christos + input_section->output_offset
7424 1.9 christos + input_section->output_section->vma);
7425 1.7 christos
7426 1.7 christos /* Invert 'y' bit if not the default. */
7427 1.7 christos if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7428 1.7 christos insn ^= BRANCH_PREDICT_BIT;
7429 1.7 christos
7430 1.7 christos bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7431 1.7 christos }
7432 1.7 christos break;
7433 1.7 christos
7434 1.7 christos case R_PPC_PLT16_HA:
7435 1.7 christos {
7436 1.7 christos unsigned int insn;
7437 1.7 christos
7438 1.7 christos insn = bfd_get_32 (input_bfd,
7439 1.7 christos contents + rel->r_offset - d_offset);
7440 1.1 christos if ((insn & (0x3fu << 26)) == 15u << 26
7441 1.7 christos && (insn & (0x1f << 16)) != 0)
7442 1.1 christos {
7443 1.1 christos if (!bfd_link_pic (info))
7444 1.3 christos {
7445 1.3 christos /* Convert addis to lis. */
7446 1.3 christos insn &= ~(0x1f << 16);
7447 1.3 christos bfd_put_32 (input_bfd, insn,
7448 1.3 christos contents + rel->r_offset - d_offset);
7449 1.3 christos }
7450 1.3 christos }
7451 1.3 christos else if (bfd_link_pic (info))
7452 1.3 christos info->callbacks->einfo
7453 1.3 christos (_("%P: %H: error: %s with unexpected instruction %x\n"),
7454 1.3 christos input_bfd, input_section, rel->r_offset,
7455 1.3 christos "R_PPC_PLT16_HA", insn);
7456 1.3 christos }
7457 1.3 christos break;
7458 1.7 christos }
7459 1.3 christos
7460 1.9 christos if (ELIMINATE_COPY_RELOCS
7461 1.3 christos && h != NULL
7462 1.3 christos && !h->def_regular
7463 1.3 christos && h->protected_def
7464 1.3 christos && ppc_elf_hash_entry (h)->has_addr16_ha
7465 1.3 christos && ppc_elf_hash_entry (h)->has_addr16_lo
7466 1.3 christos && htab->params->pic_fixup > 0)
7467 1.3 christos {
7468 1.3 christos /* Convert lis;addi or lis;load/store accessing a protected
7469 1.3 christos variable defined in a shared library to PIC. */
7470 1.3 christos unsigned int insn;
7471 1.3 christos
7472 1.3 christos if (r_type == R_PPC_ADDR16_HA)
7473 1.3 christos {
7474 1.7 christos insn = bfd_get_32 (input_bfd,
7475 1.3 christos contents + rel->r_offset - d_offset);
7476 1.3 christos if ((insn & (0x3fu << 26)) == (15u << 26)
7477 1.7 christos && (insn & (0x1f << 16)) == 0 /* lis */)
7478 1.3 christos {
7479 1.7 christos bfd_byte *p;
7480 1.7 christos bfd_vma off;
7481 1.3 christos bfd_vma got_addr;
7482 1.3 christos
7483 1.3 christos p = (contents + input_section->size
7484 1.3 christos - relax_info->workaround_size
7485 1.3 christos - relax_info->picfixup_size
7486 1.7 christos + picfixup_size);
7487 1.7 christos off = (p - contents) - (rel->r_offset - d_offset);
7488 1.3 christos if (off > 0x1fffffc || (off & 3) != 0)
7489 1.3 christos info->callbacks->einfo
7490 1.3 christos (_("%H: fixup branch overflow\n"),
7491 1.3 christos input_bfd, input_section, rel->r_offset);
7492 1.3 christos
7493 1.3 christos bfd_put_32 (input_bfd, B | off,
7494 1.7 christos contents + rel->r_offset - d_offset);
7495 1.3 christos got_addr = (htab->elf.sgot->output_section->vma
7496 1.7 christos + htab->elf.sgot->output_offset
7497 1.3 christos + (h->got.offset & ~1));
7498 1.3 christos wrel->r_offset = (p - contents) + d_offset;
7499 1.3 christos wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
7500 1.3 christos wrel->r_addend = got_addr;
7501 1.3 christos insn &= ~0xffff;
7502 1.3 christos insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
7503 1.3 christos bfd_put_32 (input_bfd, insn, p);
7504 1.3 christos
7505 1.3 christos /* Convert lis to lwz, loading address from GOT. */
7506 1.3 christos insn &= ~0xffff;
7507 1.3 christos insn ^= (32u ^ 15u) << 26;
7508 1.3 christos insn |= (insn & (0x1f << 21)) >> 5;
7509 1.3 christos insn |= got_addr & 0xffff;
7510 1.3 christos bfd_put_32 (input_bfd, insn, p + 4);
7511 1.3 christos
7512 1.7 christos bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
7513 1.7 christos picfixup_size += 12;
7514 1.7 christos
7515 1.7 christos /* Use one of the spare relocs, so --emit-relocs
7516 1.7 christos output is reasonable. */
7517 1.3 christos memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7518 1.3 christos wrel++, rel++;
7519 1.3 christos rel->r_offset = wrel[-1].r_offset + 4;
7520 1.3 christos rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
7521 1.7 christos rel->r_addend = wrel[-1].r_addend;
7522 1.3 christos
7523 1.9 christos /* Continue on as if we had a got reloc, to output
7524 1.9 christos dynamic reloc. */
7525 1.9 christos r_type = R_PPC_GOT16_LO;
7526 1.9 christos }
7527 1.9 christos else
7528 1.9 christos _bfd_error_handler
7529 1.9 christos /* xgettext:c-format */
7530 1.9 christos (_("%pB(%pA+%#" PRIx64 "): error: "
7531 1.9 christos "%s with unexpected instruction %#x"),
7532 1.9 christos input_bfd, input_section, (uint64_t) rel->r_offset,
7533 1.9 christos "R_PPC_ADDR16_HA", insn);
7534 1.9 christos }
7535 1.9 christos else if (r_type == R_PPC_ADDR16_LO)
7536 1.9 christos {
7537 1.9 christos insn = bfd_get_32 (input_bfd,
7538 1.3 christos contents + rel->r_offset - d_offset);
7539 1.9 christos if ((insn & (0x3fu << 26)) == 14u << 26 /* addi */
7540 1.3 christos || (insn & (0x3fu << 26)) == 32u << 26 /* lwz */
7541 1.3 christos || (insn & (0x3fu << 26)) == 34u << 26 /* lbz */
7542 1.3 christos || (insn & (0x3fu << 26)) == 36u << 26 /* stw */
7543 1.3 christos || (insn & (0x3fu << 26)) == 38u << 26 /* stb */
7544 1.3 christos || (insn & (0x3fu << 26)) == 40u << 26 /* lhz */
7545 1.3 christos || (insn & (0x3fu << 26)) == 42u << 26 /* lha */
7546 1.3 christos || (insn & (0x3fu << 26)) == 44u << 26 /* sth */
7547 1.3 christos || (insn & (0x3fu << 26)) == 46u << 26 /* lmw */
7548 1.7 christos || (insn & (0x3fu << 26)) == 47u << 26 /* stmw */
7549 1.7 christos || (insn & (0x3fu << 26)) == 48u << 26 /* lfs */
7550 1.7 christos || (insn & (0x3fu << 26)) == 50u << 26 /* lfd */
7551 1.7 christos || (insn & (0x3fu << 26)) == 52u << 26 /* stfs */
7552 1.7 christos || (insn & (0x3fu << 26)) == 54u << 26 /* stfd */
7553 1.3 christos || ((insn & (0x3fu << 26)) == 58u << 26 /* lwa,ld,lmd */
7554 1.3 christos && (insn & 3) != 1)
7555 1.3 christos || ((insn & (0x3fu << 26)) == 62u << 26 /* std, stmd */
7556 1.3 christos && ((insn & 3) == 0 || (insn & 3) == 3)))
7557 1.1 christos {
7558 1.1 christos /* Arrange to apply the reloc addend, if any. */
7559 1.1 christos relocation = 0;
7560 1.1 christos unresolved_reloc = FALSE;
7561 1.1 christos rel->r_info = ELF32_R_INFO (0, r_type);
7562 1.1 christos }
7563 1.1 christos else
7564 1.1 christos _bfd_error_handler
7565 1.1 christos /* xgettext:c-format */
7566 1.1 christos (_("%pB(%pA+%#" PRIx64 "): error: "
7567 1.1 christos "%s with unexpected instruction %#x"),
7568 1.1 christos input_bfd, input_section, (uint64_t) rel->r_offset,
7569 1.1 christos "R_PPC_ADDR16_LO", insn);
7570 1.1 christos }
7571 1.1 christos }
7572 1.1 christos
7573 1.1 christos ifunc = NULL;
7574 1.1 christos if (!htab->is_vxworks)
7575 1.1 christos {
7576 1.1 christos struct plt_entry *ent;
7577 1.1 christos
7578 1.1 christos if (h != NULL)
7579 1.3 christos {
7580 1.7 christos if (h->type == STT_GNU_IFUNC)
7581 1.7 christos ifunc = &h->plt.plist;
7582 1.7 christos }
7583 1.7 christos else if (local_got_offsets != NULL
7584 1.1 christos && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7585 1.1 christos {
7586 1.7 christos struct plt_entry **local_plt;
7587 1.7 christos
7588 1.7 christos local_plt = (struct plt_entry **) (local_got_offsets
7589 1.7 christos + symtab_hdr->sh_info);
7590 1.7 christos ifunc = local_plt + r_symndx;
7591 1.1 christos }
7592 1.1 christos
7593 1.1 christos ent = NULL;
7594 1.1 christos if (ifunc != NULL
7595 1.1 christos && (!bfd_link_pic (info)
7596 1.7 christos || is_branch_reloc (r_type)
7597 1.7 christos || r_type == R_PPC_PLT16_LO
7598 1.7 christos || r_type == R_PPC_PLT16_HI
7599 1.7 christos || r_type == R_PPC_PLT16_HA))
7600 1.7 christos {
7601 1.7 christos addend = 0;
7602 1.1 christos if (bfd_link_pic (info)
7603 1.7 christos && (r_type == R_PPC_PLTREL24
7604 1.7 christos || r_type == R_PPC_PLT16_LO
7605 1.7 christos || r_type == R_PPC_PLT16_HI
7606 1.7 christos || r_type == R_PPC_PLT16_HA))
7607 1.7 christos addend = rel->r_addend;
7608 1.7 christos ent = find_plt_ent (ifunc, got2, addend);
7609 1.7 christos }
7610 1.7 christos if (ent != NULL)
7611 1.7 christos {
7612 1.7 christos if (bfd_link_pic (info)
7613 1.7 christos && ent->sec != got2
7614 1.7 christos && htab->plt_type != PLT_NEW
7615 1.7 christos && (!htab->elf.dynamic_sections_created
7616 1.1 christos || h == NULL
7617 1.1 christos || h->dynindx == -1))
7618 1.1 christos {
7619 1.1 christos /* Uh oh, we are going to create a pic glink stub
7620 1.1 christos for an ifunc (here for h == NULL and later in
7621 1.3 christos finish_dynamic_symbol for h != NULL), and
7622 1.3 christos apparently are using code compiled with
7623 1.1 christos -mbss-plt. The difficulty is that -mbss-plt code
7624 1.1 christos gives no indication via a magic PLTREL24 addend
7625 1.1 christos whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
7626 1.1 christos is pointing into a .got2 section (and how far
7627 1.7 christos into .got2). */
7628 1.7 christos info->callbacks->einfo
7629 1.1 christos /* xgettext:c-format */
7630 1.1 christos (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
7631 1.1 christos input_bfd, input_section, rel->r_offset, sym_name);
7632 1.1 christos }
7633 1.1 christos
7634 1.7 christos unresolved_reloc = FALSE;
7635 1.1 christos if (htab->plt_type == PLT_NEW
7636 1.1 christos || !htab->elf.dynamic_sections_created
7637 1.1 christos || h == NULL
7638 1.7 christos || h->dynindx == -1)
7639 1.7 christos relocation = (htab->glink->output_section->vma
7640 1.7 christos + htab->glink->output_offset
7641 1.7 christos + (ent->glink_offset & ~1));
7642 1.7 christos else
7643 1.7 christos relocation = (htab->elf.splt->output_section->vma
7644 1.7 christos + htab->elf.splt->output_offset
7645 1.7 christos + ent->plt.offset);
7646 1.7 christos }
7647 1.7 christos }
7648 1.7 christos
7649 1.9 christos addend = rel->r_addend;
7650 1.7 christos save_unresolved_reloc = unresolved_reloc;
7651 1.7 christos howto = NULL;
7652 1.7 christos if (r_type < R_PPC_max)
7653 1.7 christos howto = ppc_elf_howto_table[r_type];
7654 1.7 christos
7655 1.7 christos switch (r_type)
7656 1.7 christos {
7657 1.7 christos default:
7658 1.7 christos break;
7659 1.7 christos
7660 1.7 christos case R_PPC_TPREL16_HA:
7661 1.7 christos if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
7662 1.7 christos {
7663 1.7 christos bfd_byte *p = contents + (rel->r_offset & ~3);
7664 1.7 christos unsigned int insn = bfd_get_32 (input_bfd, p);
7665 1.7 christos if ((insn & ((0x3fu << 26) | 0x1f << 16))
7666 1.7 christos != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7667 1.7 christos /* xgettext:c-format */
7668 1.7 christos info->callbacks->minfo
7669 1.7 christos (_("%H: warning: %s unexpected insn %#x.\n"),
7670 1.7 christos input_bfd, input_section, rel->r_offset, howto->name, insn);
7671 1.7 christos else
7672 1.7 christos bfd_put_32 (input_bfd, NOP, p);
7673 1.7 christos }
7674 1.1 christos break;
7675 1.1 christos
7676 1.7 christos case R_PPC_TPREL16_LO:
7677 1.7 christos if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
7678 1.7 christos {
7679 1.1 christos bfd_byte *p = contents + (rel->r_offset & ~3);
7680 1.1 christos unsigned int insn = bfd_get_32 (input_bfd, p);
7681 1.1 christos insn &= ~(0x1f << 16);
7682 1.3 christos insn |= 2 << 16;
7683 1.1 christos bfd_put_32 (input_bfd, insn, p);
7684 1.1 christos }
7685 1.1 christos break;
7686 1.1 christos }
7687 1.1 christos
7688 1.1 christos tls_type = 0;
7689 1.1 christos switch (r_type)
7690 1.1 christos {
7691 1.3 christos default:
7692 1.1 christos /* xgettext:c-format */
7693 1.1 christos _bfd_error_handler (_("%pB: %s unsupported"),
7694 1.1 christos input_bfd, howto->name);
7695 1.1 christos
7696 1.1 christos bfd_set_error (bfd_error_bad_value);
7697 1.1 christos ret = FALSE;
7698 1.1 christos goto copy_reloc;
7699 1.1 christos
7700 1.1 christos case R_PPC_NONE:
7701 1.1 christos case R_PPC_TLS:
7702 1.1 christos case R_PPC_TLSGD:
7703 1.1 christos case R_PPC_TLSLD:
7704 1.1 christos case R_PPC_EMB_MRKREF:
7705 1.1 christos case R_PPC_GNU_VTINHERIT:
7706 1.1 christos case R_PPC_GNU_VTENTRY:
7707 1.1 christos goto copy_reloc;
7708 1.1 christos
7709 1.1 christos /* GOT16 relocations. Like an ADDR16 using the symbol's
7710 1.1 christos address in the GOT as relocation value instead of the
7711 1.1 christos symbol's value itself. Also, create a GOT entry for the
7712 1.1 christos symbol and put the symbol value there. */
7713 1.1 christos case R_PPC_GOT_TLSGD16:
7714 1.1 christos case R_PPC_GOT_TLSGD16_LO:
7715 1.1 christos case R_PPC_GOT_TLSGD16_HI:
7716 1.1 christos case R_PPC_GOT_TLSGD16_HA:
7717 1.1 christos tls_type = TLS_TLS | TLS_GD;
7718 1.1 christos goto dogot;
7719 1.1 christos
7720 1.1 christos case R_PPC_GOT_TLSLD16:
7721 1.1 christos case R_PPC_GOT_TLSLD16_LO:
7722 1.1 christos case R_PPC_GOT_TLSLD16_HI:
7723 1.1 christos case R_PPC_GOT_TLSLD16_HA:
7724 1.1 christos tls_type = TLS_TLS | TLS_LD;
7725 1.1 christos goto dogot;
7726 1.1 christos
7727 1.1 christos case R_PPC_GOT_TPREL16:
7728 1.1 christos case R_PPC_GOT_TPREL16_LO:
7729 1.1 christos case R_PPC_GOT_TPREL16_HI:
7730 1.1 christos case R_PPC_GOT_TPREL16_HA:
7731 1.1 christos tls_type = TLS_TLS | TLS_TPREL;
7732 1.1 christos goto dogot;
7733 1.1 christos
7734 1.1 christos case R_PPC_GOT_DTPREL16:
7735 1.1 christos case R_PPC_GOT_DTPREL16_LO:
7736 1.1 christos case R_PPC_GOT_DTPREL16_HI:
7737 1.1 christos case R_PPC_GOT_DTPREL16_HA:
7738 1.7 christos tls_type = TLS_TLS | TLS_DTPREL;
7739 1.1 christos goto dogot;
7740 1.1 christos
7741 1.1 christos case R_PPC_GOT16:
7742 1.1 christos case R_PPC_GOT16_LO:
7743 1.9 christos case R_PPC_GOT16_HI:
7744 1.1 christos case R_PPC_GOT16_HA:
7745 1.1 christos tls_mask = 0;
7746 1.1 christos dogot:
7747 1.7 christos {
7748 1.7 christos /* Relocation is to the entry for this symbol in the global
7749 1.7 christos offset table. */
7750 1.7 christos bfd_vma off;
7751 1.1 christos bfd_vma *offp;
7752 1.1 christos unsigned long indx;
7753 1.1 christos
7754 1.1 christos if (htab->elf.sgot == NULL)
7755 1.1 christos abort ();
7756 1.1 christos
7757 1.1 christos indx = 0;
7758 1.1 christos if (tls_type == (TLS_TLS | TLS_LD)
7759 1.1 christos && SYMBOL_REFERENCES_LOCAL (info, h))
7760 1.1 christos offp = &htab->tlsld_got.offset;
7761 1.1 christos else if (h != NULL)
7762 1.1 christos {
7763 1.1 christos if (!htab->elf.dynamic_sections_created
7764 1.1 christos || h->dynindx == -1
7765 1.1 christos || SYMBOL_REFERENCES_LOCAL (info, h)
7766 1.1 christos || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
7767 1.1 christos /* This is actually a static link, or it is a
7768 1.1 christos -Bsymbolic link and the symbol is defined
7769 1.1 christos locally, or the symbol was forced to be local
7770 1.1 christos because of a version file. */
7771 1.1 christos ;
7772 1.1 christos else
7773 1.1 christos {
7774 1.1 christos indx = h->dynindx;
7775 1.1 christos unresolved_reloc = FALSE;
7776 1.1 christos }
7777 1.1 christos offp = &h->got.offset;
7778 1.7 christos }
7779 1.7 christos else
7780 1.9 christos {
7781 1.7 christos if (local_got_offsets == NULL)
7782 1.1 christos abort ();
7783 1.1 christos offp = &local_got_offsets[r_symndx];
7784 1.1 christos }
7785 1.9 christos
7786 1.9 christos /* The offset must always be a multiple of 4. We use the
7787 1.1 christos least significant bit to record whether we have already
7788 1.1 christos processed this entry. */
7789 1.1 christos off = *offp;
7790 1.1 christos if ((off & 1) != 0)
7791 1.1 christos off &= ~1;
7792 1.1 christos else
7793 1.1 christos {
7794 1.1 christos unsigned int tls_m = ((tls_mask & TLS_TLS) != 0
7795 1.1 christos ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL
7796 1.1 christos | TLS_TPREL | TLS_GDIE)
7797 1.1 christos : 0);
7798 1.1 christos
7799 1.1 christos if (offp == &htab->tlsld_got.offset)
7800 1.1 christos tls_m = TLS_LD;
7801 1.1 christos else if ((tls_m & TLS_LD) != 0
7802 1.1 christos && SYMBOL_REFERENCES_LOCAL (info, h))
7803 1.1 christos tls_m &= ~TLS_LD;
7804 1.1 christos
7805 1.1 christos /* We might have multiple got entries for this sym.
7806 1.1 christos Initialize them all. */
7807 1.1 christos do
7808 1.1 christos {
7809 1.1 christos int tls_ty = 0;
7810 1.9 christos
7811 1.1 christos if ((tls_m & TLS_LD) != 0)
7812 1.1 christos {
7813 1.1 christos tls_ty = TLS_TLS | TLS_LD;
7814 1.1 christos tls_m &= ~TLS_LD;
7815 1.1 christos }
7816 1.1 christos else if ((tls_m & TLS_GD) != 0)
7817 1.7 christos {
7818 1.7 christos tls_ty = TLS_TLS | TLS_GD;
7819 1.7 christos tls_m &= ~TLS_GD;
7820 1.9 christos }
7821 1.9 christos else if ((tls_m & TLS_DTPREL) != 0)
7822 1.7 christos {
7823 1.7 christos tls_ty = TLS_TLS | TLS_DTPREL;
7824 1.1 christos tls_m &= ~TLS_DTPREL;
7825 1.7 christos }
7826 1.1 christos else if ((tls_m & (TLS_TPREL | TLS_GDIE)) != 0)
7827 1.1 christos {
7828 1.3 christos tls_ty = TLS_TLS | TLS_TPREL;
7829 1.7 christos tls_m = 0;
7830 1.7 christos }
7831 1.7 christos
7832 1.7 christos /* Generate relocs for the dynamic linker. */
7833 1.7 christos if (indx != 0
7834 1.7 christos || (bfd_link_pic (info)
7835 1.7 christos && (h == NULL
7836 1.7 christos || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
7837 1.7 christos && !(tls_ty != 0
7838 1.1 christos && bfd_link_executable (info)
7839 1.1 christos && SYMBOL_REFERENCES_LOCAL (info, h))))
7840 1.1 christos {
7841 1.1 christos asection *rsec = htab->elf.srelgot;
7842 1.1 christos bfd_byte * loc;
7843 1.1 christos
7844 1.1 christos if (ifunc != NULL)
7845 1.1 christos {
7846 1.1 christos rsec = htab->elf.irelplt;
7847 1.1 christos if (indx == 0)
7848 1.1 christos htab->local_ifunc_resolver = 1;
7849 1.1 christos else if (is_static_defined (h))
7850 1.1 christos htab->maybe_local_ifunc_resolver = 1;
7851 1.1 christos }
7852 1.1 christos outrel.r_offset = (htab->elf.sgot->output_section->vma
7853 1.1 christos + htab->elf.sgot->output_offset
7854 1.1 christos + off);
7855 1.1 christos outrel.r_addend = 0;
7856 1.1 christos if (tls_ty & (TLS_LD | TLS_GD))
7857 1.1 christos {
7858 1.1 christos outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7859 1.1 christos if (tls_ty == (TLS_TLS | TLS_GD))
7860 1.1 christos {
7861 1.1 christos loc = rsec->contents;
7862 1.1 christos loc += (rsec->reloc_count++
7863 1.1 christos * sizeof (Elf32_External_Rela));
7864 1.1 christos bfd_elf32_swap_reloca_out (output_bfd,
7865 1.1 christos &outrel, loc);
7866 1.1 christos outrel.r_offset += 4;
7867 1.1 christos outrel.r_info
7868 1.1 christos = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7869 1.3 christos }
7870 1.3 christos }
7871 1.3 christos else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7872 1.3 christos outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7873 1.3 christos else if (tls_ty == (TLS_TLS | TLS_TPREL))
7874 1.3 christos outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7875 1.1 christos else if (indx != 0)
7876 1.1 christos outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7877 1.1 christos else if (ifunc != NULL)
7878 1.1 christos outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7879 1.1 christos else
7880 1.1 christos outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7881 1.1 christos if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7882 1.1 christos {
7883 1.1 christos outrel.r_addend += relocation;
7884 1.1 christos if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7885 1.1 christos {
7886 1.1 christos if (htab->elf.tls_sec == NULL)
7887 1.1 christos outrel.r_addend = 0;
7888 1.7 christos else
7889 1.1 christos outrel.r_addend -= htab->elf.tls_sec->vma;
7890 1.3 christos }
7891 1.3 christos }
7892 1.3 christos loc = rsec->contents;
7893 1.3 christos loc += (rsec->reloc_count++
7894 1.7 christos * sizeof (Elf32_External_Rela));
7895 1.7 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7896 1.7 christos }
7897 1.7 christos
7898 1.7 christos /* Init the .got section contents if we're not
7899 1.3 christos emitting a reloc. */
7900 1.3 christos else
7901 1.1 christos {
7902 1.7 christos bfd_vma value = relocation;
7903 1.1 christos
7904 1.7 christos if (tls_ty != 0)
7905 1.7 christos {
7906 1.1 christos if (htab->elf.tls_sec == NULL)
7907 1.1 christos value = 0;
7908 1.1 christos else
7909 1.7 christos {
7910 1.7 christos if (tls_ty & TLS_LD)
7911 1.1 christos value = 0;
7912 1.1 christos else
7913 1.1 christos value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7914 1.1 christos if (tls_ty & TLS_TPREL)
7915 1.1 christos value += DTP_OFFSET - TP_OFFSET;
7916 1.1 christos }
7917 1.1 christos
7918 1.1 christos if (tls_ty & (TLS_LD | TLS_GD))
7919 1.1 christos {
7920 1.1 christos bfd_put_32 (input_bfd, value,
7921 1.1 christos htab->elf.sgot->contents + off + 4);
7922 1.1 christos value = 1;
7923 1.1 christos }
7924 1.1 christos }
7925 1.1 christos bfd_put_32 (input_bfd, value,
7926 1.1 christos htab->elf.sgot->contents + off);
7927 1.1 christos }
7928 1.1 christos
7929 1.1 christos off += 4;
7930 1.1 christos if (tls_ty & (TLS_LD | TLS_GD))
7931 1.9 christos off += 4;
7932 1.1 christos }
7933 1.1 christos while (tls_m != 0);
7934 1.1 christos
7935 1.1 christos off = *offp;
7936 1.1 christos *offp = off | 1;
7937 1.1 christos }
7938 1.1 christos
7939 1.1 christos if (off >= (bfd_vma) -2)
7940 1.1 christos abort ();
7941 1.1 christos
7942 1.1 christos if ((tls_type & TLS_TLS) != 0)
7943 1.1 christos {
7944 1.1 christos if (tls_type != (TLS_TLS | TLS_LD))
7945 1.1 christos {
7946 1.3 christos if ((tls_mask & TLS_LD) != 0
7947 1.3 christos && !SYMBOL_REFERENCES_LOCAL (info, h))
7948 1.3 christos off += 8;
7949 1.3 christos if (tls_type != (TLS_TLS | TLS_GD))
7950 1.7 christos {
7951 1.7 christos if ((tls_mask & TLS_GD) != 0)
7952 1.1 christos off += 8;
7953 1.1 christos if (tls_type != (TLS_TLS | TLS_DTPREL))
7954 1.1 christos {
7955 1.1 christos if ((tls_mask & TLS_DTPREL) != 0)
7956 1.1 christos off += 4;
7957 1.1 christos }
7958 1.1 christos }
7959 1.1 christos }
7960 1.1 christos }
7961 1.7 christos
7962 1.7 christos /* If here for a picfixup, we're done. */
7963 1.1 christos if (r_type != ELF32_R_TYPE (rel->r_info))
7964 1.1 christos goto copy_reloc;
7965 1.1 christos
7966 1.1 christos relocation = (htab->elf.sgot->output_section->vma
7967 1.3 christos + htab->elf.sgot->output_offset
7968 1.1 christos + off
7969 1.3 christos - SYM_VAL (htab->elf.hgot));
7970 1.1 christos
7971 1.1 christos /* Addends on got relocations don't make much sense.
7972 1.1 christos x+off@got is actually x@got+off, and since the got is
7973 1.1 christos generated by a hash table traversal, the value in the
7974 1.1 christos got at entry m+n bears little relation to the entry m. */
7975 1.6 christos if (addend != 0)
7976 1.6 christos info->callbacks->einfo
7977 1.6 christos /* xgettext:c-format */
7978 1.6 christos (_("%H: non-zero addend on %s reloc against `%s'\n"),
7979 1.6 christos input_bfd, input_section, rel->r_offset,
7980 1.6 christos howto->name,
7981 1.3 christos sym_name);
7982 1.1 christos }
7983 1.7 christos break;
7984 1.7 christos
7985 1.7 christos /* Relocations that need no special processing. */
7986 1.7 christos case R_PPC_LOCAL24PC:
7987 1.7 christos /* It makes no sense to point a local relocation
7988 1.7 christos at a symbol not in this object. */
7989 1.7 christos if (unresolved_reloc)
7990 1.7 christos {
7991 1.7 christos (*info->callbacks->undefined_symbol) (info,
7992 1.7 christos h->root.root.string,
7993 1.7 christos input_bfd,
7994 1.7 christos input_section,
7995 1.7 christos rel->r_offset,
7996 1.7 christos TRUE);
7997 1.7 christos goto copy_reloc;
7998 1.1 christos }
7999 1.1 christos if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8000 1.1 christos {
8001 1.1 christos /* @local on an ifunc does not really make sense since
8002 1.1 christos the ifunc resolver can take you anywhere. More
8003 1.1 christos seriously, calls to ifuncs must go through a plt call
8004 1.3 christos stub, and for pic the plt call stubs uses r30 to
8005 1.3 christos access the PLT. The problem is that a call that is
8006 1.1 christos local won't have the +32k reloc addend trick marking
8007 1.1 christos -fPIC code, so the linker won't know whether r30 is
8008 1.1 christos _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8009 1.1 christos /* xgettext:c-format */
8010 1.1 christos info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8011 1.1 christos input_bfd, input_section, rel->r_offset,
8012 1.1 christos h->root.root.string);
8013 1.1 christos }
8014 1.1 christos break;
8015 1.1 christos
8016 1.1 christos case R_PPC_DTPREL16:
8017 1.1 christos case R_PPC_DTPREL16_LO:
8018 1.1 christos case R_PPC_DTPREL16_HI:
8019 1.1 christos case R_PPC_DTPREL16_HA:
8020 1.1 christos if (htab->elf.tls_sec != NULL)
8021 1.1 christos addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8022 1.1 christos break;
8023 1.7 christos
8024 1.1 christos /* Relocations that may need to be propagated if this is a shared
8025 1.1 christos object. */
8026 1.7 christos case R_PPC_TPREL16:
8027 1.1 christos case R_PPC_TPREL16_LO:
8028 1.1 christos case R_PPC_TPREL16_HI:
8029 1.3 christos case R_PPC_TPREL16_HA:
8030 1.3 christos if (h != NULL
8031 1.1 christos && h->root.type == bfd_link_hash_undefweak
8032 1.7 christos && h->dynindx == -1)
8033 1.7 christos {
8034 1.1 christos /* Make this relocation against an undefined weak symbol
8035 1.1 christos resolve to zero. This is really just a tweak, since
8036 1.1 christos code using weak externs ought to check that they are
8037 1.3 christos defined before using them. */
8038 1.3 christos bfd_byte *p = contents + rel->r_offset - d_offset;
8039 1.1 christos unsigned int insn = bfd_get_32 (input_bfd, p);
8040 1.1 christos insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8041 1.1 christos if (insn != 0)
8042 1.3 christos bfd_put_32 (input_bfd, insn, p);
8043 1.3 christos break;
8044 1.1 christos }
8045 1.1 christos if (htab->elf.tls_sec != NULL)
8046 1.1 christos addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8047 1.1 christos /* The TPREL16 relocs shouldn't really be used in shared
8048 1.1 christos libs or with non-local symbols as that will result in
8049 1.1 christos DT_TEXTREL being set, but support them anyway. */
8050 1.1 christos goto dodyn;
8051 1.1 christos
8052 1.1 christos case R_PPC_TPREL32:
8053 1.1 christos if (htab->elf.tls_sec != NULL)
8054 1.1 christos addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8055 1.3 christos goto dodyn;
8056 1.1 christos
8057 1.1 christos case R_PPC_DTPREL32:
8058 1.1 christos if (htab->elf.tls_sec != NULL)
8059 1.1 christos addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8060 1.1 christos goto dodyn;
8061 1.1 christos
8062 1.1 christos case R_PPC_DTPMOD32:
8063 1.1 christos relocation = 1;
8064 1.1 christos addend = 0;
8065 1.1 christos goto dodyn;
8066 1.1 christos
8067 1.1 christos case R_PPC_REL16:
8068 1.1 christos case R_PPC_REL16_LO:
8069 1.1 christos case R_PPC_REL16_HI:
8070 1.1 christos case R_PPC_REL16_HA:
8071 1.1 christos case R_PPC_REL16DX_HA:
8072 1.1 christos break;
8073 1.1 christos
8074 1.1 christos case R_PPC_REL32:
8075 1.1 christos if (h == NULL || h == htab->elf.hgot)
8076 1.1 christos break;
8077 1.1 christos /* fall through */
8078 1.1 christos
8079 1.1 christos case R_PPC_ADDR32:
8080 1.1 christos case R_PPC_ADDR16:
8081 1.1 christos case R_PPC_ADDR16_LO:
8082 1.1 christos case R_PPC_ADDR16_HI:
8083 1.1 christos case R_PPC_ADDR16_HA:
8084 1.1 christos case R_PPC_UADDR32:
8085 1.1 christos case R_PPC_UADDR16:
8086 1.1 christos goto dodyn;
8087 1.1 christos
8088 1.1 christos case R_PPC_VLE_REL8:
8089 1.1 christos case R_PPC_VLE_REL15:
8090 1.3 christos case R_PPC_VLE_REL24:
8091 1.1 christos case R_PPC_REL24:
8092 1.1 christos case R_PPC_REL14:
8093 1.1 christos case R_PPC_REL14_BRTAKEN:
8094 1.1 christos case R_PPC_REL14_BRNTAKEN:
8095 1.1 christos /* If these relocations are not to a named symbol, they can be
8096 1.1 christos handled right here, no need to bother the dynamic linker. */
8097 1.1 christos if (SYMBOL_CALLS_LOCAL (info, h)
8098 1.1 christos || h == htab->elf.hgot)
8099 1.7 christos break;
8100 1.7 christos /* fall through */
8101 1.7 christos
8102 1.7 christos case R_PPC_ADDR24:
8103 1.7 christos case R_PPC_ADDR14:
8104 1.7 christos case R_PPC_ADDR14_BRTAKEN:
8105 1.7 christos case R_PPC_ADDR14_BRNTAKEN:
8106 1.1 christos if (h != NULL && !bfd_link_pic (info))
8107 1.1 christos break;
8108 1.3 christos /* fall through */
8109 1.3 christos
8110 1.7 christos dodyn:
8111 1.7 christos if ((input_section->flags & SEC_ALLOC) == 0
8112 1.1 christos || is_vxworks_tls)
8113 1.1 christos break;
8114 1.1 christos
8115 1.1 christos if (bfd_link_pic (info)
8116 1.1 christos ? ((h == NULL
8117 1.1 christos || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
8118 1.1 christos && ((h != NULL && pc_dynrelocs (h))
8119 1.1 christos || must_be_dyn_reloc (info, r_type)))
8120 1.1 christos : (h != NULL
8121 1.1 christos && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
8122 1.1 christos {
8123 1.1 christos int skip;
8124 1.1 christos bfd_byte *loc;
8125 1.1 christos asection *sreloc;
8126 1.1 christos long indx = 0;
8127 1.1 christos
8128 1.1 christos #ifdef DEBUG
8129 1.1 christos fprintf (stderr, "ppc_elf_relocate_section needs to "
8130 1.1 christos "create relocation for %s\n",
8131 1.1 christos (h && h->root.root.string
8132 1.9 christos ? h->root.root.string : "<unknown>"));
8133 1.9 christos #endif
8134 1.9 christos
8135 1.9 christos /* When generating a shared object, these relocations
8136 1.9 christos are copied into the output file to be resolved at run
8137 1.9 christos time. */
8138 1.9 christos skip = 0;
8139 1.9 christos outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8140 1.1 christos input_section,
8141 1.1 christos rel->r_offset);
8142 1.7 christos if (outrel.r_offset == (bfd_vma) -1
8143 1.1 christos || outrel.r_offset == (bfd_vma) -2)
8144 1.7 christos skip = (int) outrel.r_offset;
8145 1.7 christos outrel.r_offset += (input_section->output_section->vma
8146 1.1 christos + input_section->output_offset);
8147 1.7 christos
8148 1.1 christos /* Optimize unaligned reloc use. */
8149 1.1 christos if ((r_type == R_PPC_ADDR32 && (outrel.r_offset & 3) != 0)
8150 1.1 christos || (r_type == R_PPC_UADDR32 && (outrel.r_offset & 3) == 0))
8151 1.1 christos r_type ^= R_PPC_ADDR32 ^ R_PPC_UADDR32;
8152 1.1 christos if ((r_type == R_PPC_ADDR16 && (outrel.r_offset & 1) != 0)
8153 1.1 christos || (r_type == R_PPC_UADDR16 && (outrel.r_offset & 1) == 0))
8154 1.1 christos r_type ^= R_PPC_ADDR16 ^ R_PPC_UADDR16;
8155 1.1 christos
8156 1.1 christos if (skip)
8157 1.1 christos memset (&outrel, 0, sizeof outrel);
8158 1.1 christos else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8159 1.1 christos {
8160 1.1 christos indx = h->dynindx;
8161 1.1 christos BFD_ASSERT (indx != -1);
8162 1.1 christos unresolved_reloc = FALSE;
8163 1.1 christos outrel.r_info = ELF32_R_INFO (indx, r_type);
8164 1.1 christos outrel.r_addend = rel->r_addend;
8165 1.1 christos }
8166 1.1 christos else
8167 1.1 christos {
8168 1.1 christos outrel.r_addend = relocation + rel->r_addend;
8169 1.1 christos
8170 1.1 christos if (r_type != R_PPC_ADDR32)
8171 1.7 christos {
8172 1.7 christos if (ifunc != NULL)
8173 1.1 christos {
8174 1.1 christos /* If we get here when building a static
8175 1.1 christos executable, then the libc startup function
8176 1.1 christos responsible for applying indirect function
8177 1.1 christos relocations is going to complain about
8178 1.1 christos the reloc type.
8179 1.1 christos If we get here when building a dynamic
8180 1.1 christos executable, it will be because we have
8181 1.1 christos a text relocation. The dynamic loader
8182 1.1 christos will set the text segment writable and
8183 1.1 christos non-executable to apply text relocations.
8184 1.1 christos So we'll segfault when trying to run the
8185 1.1 christos indirection function to resolve the reloc. */
8186 1.1 christos info->callbacks->einfo
8187 1.1 christos /* xgettext:c-format */
8188 1.1 christos (_("%H: relocation %s for indirect "
8189 1.1 christos "function %s unsupported\n"),
8190 1.1 christos input_bfd, input_section, rel->r_offset,
8191 1.1 christos howto->name,
8192 1.1 christos sym_name);
8193 1.1 christos ret = FALSE;
8194 1.1 christos }
8195 1.1 christos else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8196 1.1 christos ;
8197 1.9 christos else if (sec == NULL || sec->owner == NULL)
8198 1.9 christos {
8199 1.9 christos bfd_set_error (bfd_error_bad_value);
8200 1.9 christos ret = FALSE;
8201 1.9 christos }
8202 1.9 christos else
8203 1.1 christos {
8204 1.1 christos asection *osec;
8205 1.9 christos
8206 1.9 christos /* We are turning this relocation into one
8207 1.9 christos against a section symbol. It would be
8208 1.9 christos proper to subtract the symbol's value,
8209 1.9 christos osec->vma, from the emitted reloc addend,
8210 1.9 christos but ld.so expects buggy relocs.
8211 1.1 christos FIXME: Why not always use a zero index? */
8212 1.9 christos osec = sec->output_section;
8213 1.9 christos if ((osec->flags & SEC_THREAD_LOCAL) != 0)
8214 1.9 christos {
8215 1.9 christos osec = htab->elf.tls_sec;
8216 1.9 christos indx = 0;
8217 1.9 christos }
8218 1.1 christos else
8219 1.1 christos {
8220 1.1 christos indx = elf_section_data (osec)->dynindx;
8221 1.1 christos if (indx == 0)
8222 1.1 christos {
8223 1.1 christos osec = htab->elf.text_index_section;
8224 1.1 christos indx = elf_section_data (osec)->dynindx;
8225 1.1 christos }
8226 1.1 christos BFD_ASSERT (indx != 0);
8227 1.1 christos }
8228 1.7 christos
8229 1.7 christos /* ld.so doesn't expect buggy TLS relocs.
8230 1.7 christos Don't leave the symbol value in the
8231 1.7 christos addend for them. */
8232 1.7 christos if (IS_PPC_TLS_RELOC (r_type))
8233 1.7 christos outrel.r_addend -= osec->vma;
8234 1.7 christos }
8235 1.7 christos
8236 1.7 christos outrel.r_info = ELF32_R_INFO (indx, r_type);
8237 1.7 christos }
8238 1.7 christos else if (ifunc != NULL)
8239 1.7 christos outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8240 1.1 christos else
8241 1.1 christos outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8242 1.1 christos }
8243 1.1 christos
8244 1.1 christos sreloc = elf_section_data (input_section)->sreloc;
8245 1.3 christos if (ifunc)
8246 1.1 christos {
8247 1.7 christos sreloc = htab->elf.irelplt;
8248 1.7 christos if (indx == 0)
8249 1.7 christos htab->local_ifunc_resolver = 1;
8250 1.1 christos else if (is_static_defined (h))
8251 1.1 christos htab->maybe_local_ifunc_resolver = 1;
8252 1.1 christos }
8253 1.1 christos if (sreloc == NULL)
8254 1.1 christos return FALSE;
8255 1.1 christos
8256 1.1 christos loc = sreloc->contents;
8257 1.1 christos loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8258 1.1 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8259 1.1 christos
8260 1.1 christos if (skip == -1)
8261 1.1 christos goto copy_reloc;
8262 1.1 christos
8263 1.1 christos /* This reloc will be computed at runtime. Clear the memory
8264 1.1 christos so that it contains a predictable value for prelink. */
8265 1.1 christos if (!skip)
8266 1.1 christos {
8267 1.3 christos relocation = howto->pc_relative ? outrel.r_offset : 0;
8268 1.1 christos addend = 0;
8269 1.1 christos break;
8270 1.1 christos }
8271 1.1 christos }
8272 1.1 christos break;
8273 1.1 christos
8274 1.1 christos case R_PPC_RELAX_PLT:
8275 1.1 christos case R_PPC_RELAX_PLTREL24:
8276 1.1 christos if (h != NULL)
8277 1.7 christos {
8278 1.7 christos struct plt_entry *ent;
8279 1.1 christos bfd_vma got2_addend = 0;
8280 1.1 christos
8281 1.7 christos if (r_type == R_PPC_RELAX_PLTREL24)
8282 1.1 christos {
8283 1.1 christos if (bfd_link_pic (info))
8284 1.1 christos got2_addend = addend;
8285 1.3 christos addend = 0;
8286 1.3 christos }
8287 1.3 christos ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8288 1.3 christos if (htab->plt_type == PLT_NEW)
8289 1.3 christos relocation = (htab->glink->output_section->vma
8290 1.3 christos + htab->glink->output_offset
8291 1.3 christos + ent->glink_offset);
8292 1.3 christos else
8293 1.3 christos relocation = (htab->elf.splt->output_section->vma
8294 1.3 christos + htab->elf.splt->output_offset
8295 1.3 christos + ent->plt.offset);
8296 1.7 christos }
8297 1.7 christos /* Fall through. */
8298 1.7 christos
8299 1.3 christos case R_PPC_RELAX:
8300 1.3 christos {
8301 1.3 christos const int *stub;
8302 1.3 christos size_t size;
8303 1.3 christos size_t insn_offset = rel->r_offset;
8304 1.3 christos unsigned int insn;
8305 1.3 christos
8306 1.3 christos if (bfd_link_pic (info))
8307 1.1 christos {
8308 1.1 christos relocation -= (input_section->output_section->vma
8309 1.3 christos + input_section->output_offset
8310 1.3 christos + rel->r_offset - 4);
8311 1.1 christos stub = shared_stub_entry;
8312 1.3 christos bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
8313 1.3 christos bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
8314 1.3 christos bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
8315 1.7 christos stub += 3;
8316 1.3 christos size = ARRAY_SIZE (shared_stub_entry) - 3;
8317 1.3 christos }
8318 1.3 christos else
8319 1.3 christos {
8320 1.7 christos stub = stub_entry;
8321 1.3 christos size = ARRAY_SIZE (stub_entry);
8322 1.3 christos }
8323 1.3 christos
8324 1.3 christos relocation += addend;
8325 1.3 christos if (bfd_link_relocatable (info))
8326 1.3 christos relocation = 0;
8327 1.3 christos
8328 1.7 christos /* First insn is HA, second is LO. */
8329 1.3 christos insn = *stub++;
8330 1.3 christos insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8331 1.1 christos bfd_put_32 (input_bfd, insn, contents + insn_offset);
8332 1.1 christos insn_offset += 4;
8333 1.1 christos
8334 1.1 christos insn = *stub++;
8335 1.1 christos insn |= relocation & 0xffff;
8336 1.3 christos bfd_put_32 (input_bfd, insn, contents + insn_offset);
8337 1.3 christos insn_offset += 4;
8338 1.3 christos size -= 2;
8339 1.3 christos
8340 1.3 christos while (size != 0)
8341 1.3 christos {
8342 1.3 christos insn = *stub++;
8343 1.1 christos --size;
8344 1.1 christos bfd_put_32 (input_bfd, insn, contents + insn_offset);
8345 1.1 christos insn_offset += 4;
8346 1.1 christos }
8347 1.1 christos
8348 1.1 christos /* Rewrite the reloc and convert one of the trailing nop
8349 1.1 christos relocs to describe this relocation. */
8350 1.1 christos BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8351 1.1 christos /* The relocs are at the bottom 2 bytes */
8352 1.1 christos wrel->r_offset = rel->r_offset + d_offset;
8353 1.1 christos wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8354 1.1 christos wrel->r_addend = rel->r_addend;
8355 1.1 christos memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
8356 1.1 christos wrel++, rel++;
8357 1.1 christos wrel->r_offset += 4;
8358 1.1 christos wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8359 1.1 christos }
8360 1.1 christos continue;
8361 1.1 christos
8362 1.1 christos /* Indirect .sdata relocation. */
8363 1.1 christos case R_PPC_EMB_SDAI16:
8364 1.1 christos BFD_ASSERT (htab->sdata[0].section != NULL);
8365 1.1 christos if (!is_static_defined (htab->sdata[0].sym))
8366 1.1 christos {
8367 1.1 christos unresolved_reloc = TRUE;
8368 1.1 christos break;
8369 1.1 christos }
8370 1.1 christos relocation
8371 1.1 christos = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8372 1.1 christos h, relocation, rel);
8373 1.1 christos addend = 0;
8374 1.1 christos break;
8375 1.1 christos
8376 1.1 christos /* Indirect .sdata2 relocation. */
8377 1.1 christos case R_PPC_EMB_SDA2I16:
8378 1.1 christos BFD_ASSERT (htab->sdata[1].section != NULL);
8379 1.1 christos if (!is_static_defined (htab->sdata[1].sym))
8380 1.1 christos {
8381 1.1 christos unresolved_reloc = TRUE;
8382 1.1 christos break;
8383 1.1 christos }
8384 1.9 christos relocation
8385 1.9 christos = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8386 1.1 christos h, relocation, rel);
8387 1.1 christos addend = 0;
8388 1.1 christos break;
8389 1.1 christos
8390 1.1 christos /* Handle the TOC16 reloc. We want to use the offset within the .got
8391 1.1 christos section, not the actual VMA. This is appropriate when generating
8392 1.1 christos an embedded ELF object, for which the .got section acts like the
8393 1.3 christos AIX .toc section. */
8394 1.3 christos case R_PPC_TOC16: /* phony GOT16 relocations */
8395 1.3 christos if (sec == NULL || sec->output_section == NULL)
8396 1.3 christos {
8397 1.1 christos unresolved_reloc = TRUE;
8398 1.7 christos break;
8399 1.1 christos }
8400 1.1 christos BFD_ASSERT (strcmp (bfd_section_name (sec), ".got") == 0
8401 1.1 christos || strcmp (bfd_section_name (sec), ".cgot") == 0);
8402 1.1 christos
8403 1.1 christos addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8404 1.1 christos break;
8405 1.1 christos
8406 1.1 christos case R_PPC_PLTREL24:
8407 1.1 christos if (h != NULL && ifunc == NULL)
8408 1.1 christos {
8409 1.1 christos struct plt_entry *ent;
8410 1.1 christos
8411 1.1 christos ent = find_plt_ent (&h->plt.plist, got2,
8412 1.1 christos bfd_link_pic (info) ? addend : 0);
8413 1.1 christos if (ent == NULL
8414 1.7 christos || htab->elf.splt == NULL)
8415 1.7 christos {
8416 1.1 christos /* We didn't make a PLT entry for this symbol. This
8417 1.1 christos happens when statically linking PIC code, or when
8418 1.1 christos using -Bsymbolic. */
8419 1.1 christos }
8420 1.1 christos else
8421 1.1 christos {
8422 1.1 christos /* Relocation is to the entry for this symbol in the
8423 1.1 christos procedure linkage table. */
8424 1.1 christos unresolved_reloc = FALSE;
8425 1.1 christos if (htab->plt_type == PLT_NEW)
8426 1.7 christos relocation = (htab->glink->output_section->vma
8427 1.7 christos + htab->glink->output_offset
8428 1.7 christos + ent->glink_offset);
8429 1.7 christos else
8430 1.7 christos relocation = (htab->elf.splt->output_section->vma
8431 1.7 christos + htab->elf.splt->output_offset
8432 1.7 christos + ent->plt.offset);
8433 1.7 christos }
8434 1.7 christos }
8435 1.7 christos
8436 1.7 christos /* R_PPC_PLTREL24 is rather special. If non-zero, the
8437 1.7 christos addend specifies the GOT pointer offset within .got2.
8438 1.7 christos Don't apply it to the relocation field. */
8439 1.7 christos addend = 0;
8440 1.7 christos break;
8441 1.7 christos
8442 1.7 christos case R_PPC_PLTSEQ:
8443 1.7 christos case R_PPC_PLTCALL:
8444 1.7 christos case R_PPC_PLT16_LO:
8445 1.7 christos case R_PPC_PLT16_HI:
8446 1.7 christos case R_PPC_PLT16_HA:
8447 1.7 christos plt_list = NULL;
8448 1.7 christos if (h != NULL)
8449 1.7 christos plt_list = &h->plt.plist;
8450 1.7 christos else if (ifunc != NULL)
8451 1.7 christos plt_list = ifunc;
8452 1.7 christos else if (local_got_offsets != NULL)
8453 1.7 christos {
8454 1.7 christos struct plt_entry **local_plt;
8455 1.7 christos local_plt = (struct plt_entry **) (local_got_offsets
8456 1.7 christos + symtab_hdr->sh_info);
8457 1.7 christos plt_list = local_plt + r_symndx;
8458 1.7 christos }
8459 1.7 christos unresolved_reloc = TRUE;
8460 1.7 christos if (plt_list != NULL)
8461 1.7 christos {
8462 1.7 christos struct plt_entry *ent;
8463 1.7 christos
8464 1.7 christos ent = find_plt_ent (plt_list, got2,
8465 1.7 christos bfd_link_pic (info) ? addend : 0);
8466 1.7 christos if (ent != NULL && ent->plt.offset != (bfd_vma) -1)
8467 1.7 christos {
8468 1.7 christos asection *plt;
8469 1.7 christos
8470 1.7 christos unresolved_reloc = FALSE;
8471 1.7 christos plt = htab->elf.splt;
8472 1.7 christos if (!htab->elf.dynamic_sections_created
8473 1.7 christos || h == NULL
8474 1.7 christos || h->dynindx == -1)
8475 1.7 christos {
8476 1.7 christos if (ifunc != NULL)
8477 1.7 christos plt = htab->elf.iplt;
8478 1.7 christos else
8479 1.7 christos plt = htab->pltlocal;
8480 1.7 christos }
8481 1.7 christos relocation = (plt->output_section->vma
8482 1.7 christos + plt->output_offset
8483 1.7 christos + ent->plt.offset);
8484 1.7 christos if (bfd_link_pic (info))
8485 1.1 christos {
8486 1.1 christos bfd_vma got = 0;
8487 1.1 christos
8488 1.1 christos if (ent->addend >= 32768)
8489 1.1 christos got = (ent->addend
8490 1.1 christos + ent->sec->output_section->vma
8491 1.1 christos + ent->sec->output_offset);
8492 1.1 christos else
8493 1.1 christos got = SYM_VAL (htab->elf.hgot);
8494 1.1 christos relocation -= got;
8495 1.1 christos }
8496 1.1 christos }
8497 1.1 christos }
8498 1.1 christos addend = 0;
8499 1.1 christos break;
8500 1.9 christos
8501 1.3 christos /* Relocate against _SDA_BASE_. */
8502 1.3 christos case R_PPC_SDAREL16:
8503 1.1 christos {
8504 1.7 christos const char *name;
8505 1.7 christos struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8506 1.7 christos
8507 1.7 christos if (sec == NULL
8508 1.1 christos || sec->output_section == NULL
8509 1.1 christos || !is_static_defined (sda))
8510 1.1 christos {
8511 1.1 christos unresolved_reloc = TRUE;
8512 1.1 christos break;
8513 1.1 christos }
8514 1.1 christos addend -= SYM_VAL (sda);
8515 1.1 christos
8516 1.1 christos name = bfd_section_name (sec->output_section);
8517 1.1 christos if (!(strcmp (name, ".sdata") == 0
8518 1.1 christos || strcmp (name, ".sbss") == 0))
8519 1.1 christos {
8520 1.1 christos _bfd_error_handler
8521 1.1 christos /* xgettext:c-format */
8522 1.1 christos (_("%pB: the target (%s) of a %s relocation is "
8523 1.1 christos "in the wrong output section (%s)"),
8524 1.1 christos input_bfd,
8525 1.1 christos sym_name,
8526 1.1 christos howto->name,
8527 1.1 christos name);
8528 1.1 christos }
8529 1.1 christos }
8530 1.1 christos break;
8531 1.9 christos
8532 1.3 christos /* Relocate against _SDA2_BASE_. */
8533 1.3 christos case R_PPC_EMB_SDA2REL:
8534 1.1 christos {
8535 1.7 christos const char *name;
8536 1.7 christos struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8537 1.7 christos
8538 1.7 christos if (sec == NULL
8539 1.1 christos || sec->output_section == NULL
8540 1.1 christos || !is_static_defined (sda))
8541 1.1 christos {
8542 1.1 christos unresolved_reloc = TRUE;
8543 1.1 christos break;
8544 1.1 christos }
8545 1.1 christos addend -= SYM_VAL (sda);
8546 1.1 christos
8547 1.1 christos name = bfd_section_name (sec->output_section);
8548 1.3 christos if (!(strcmp (name, ".sdata2") == 0
8549 1.7 christos || strcmp (name, ".sbss2") == 0))
8550 1.7 christos {
8551 1.7 christos _bfd_error_handler
8552 1.3 christos /* xgettext:c-format */
8553 1.1 christos (_("%pB: the target (%s) of a %s relocation is "
8554 1.1 christos "in the wrong output section (%s)"),
8555 1.3 christos input_bfd,
8556 1.7 christos sym_name,
8557 1.7 christos howto->name,
8558 1.7 christos name);
8559 1.3 christos }
8560 1.1 christos }
8561 1.1 christos break;
8562 1.3 christos
8563 1.7 christos case R_PPC_VLE_LO16A:
8564 1.7 christos relocation = relocation + addend;
8565 1.7 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8566 1.3 christos contents + rel->r_offset, relocation,
8567 1.1 christos split16a_type, htab->params->vle_reloc_fixup);
8568 1.1 christos goto copy_reloc;
8569 1.3 christos
8570 1.7 christos case R_PPC_VLE_LO16D:
8571 1.7 christos relocation = relocation + addend;
8572 1.7 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8573 1.3 christos contents + rel->r_offset, relocation,
8574 1.1 christos split16d_type, htab->params->vle_reloc_fixup);
8575 1.1 christos goto copy_reloc;
8576 1.3 christos
8577 1.7 christos case R_PPC_VLE_HI16A:
8578 1.7 christos relocation = (relocation + addend) >> 16;
8579 1.7 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8580 1.3 christos contents + rel->r_offset, relocation,
8581 1.1 christos split16a_type, htab->params->vle_reloc_fixup);
8582 1.1 christos goto copy_reloc;
8583 1.3 christos
8584 1.7 christos case R_PPC_VLE_HI16D:
8585 1.7 christos relocation = (relocation + addend) >> 16;
8586 1.7 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8587 1.3 christos contents + rel->r_offset, relocation,
8588 1.1 christos split16d_type, htab->params->vle_reloc_fixup);
8589 1.1 christos goto copy_reloc;
8590 1.1 christos
8591 1.1 christos case R_PPC_VLE_HA16A:
8592 1.1 christos relocation = (relocation + addend + 0x8000) >> 16;
8593 1.1 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8594 1.1 christos contents + rel->r_offset, relocation,
8595 1.1 christos split16a_type, htab->params->vle_reloc_fixup);
8596 1.1 christos goto copy_reloc;
8597 1.3 christos
8598 1.1 christos case R_PPC_VLE_HA16D:
8599 1.1 christos relocation = (relocation + addend + 0x8000) >> 16;
8600 1.1 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8601 1.1 christos contents + rel->r_offset, relocation,
8602 1.1 christos split16d_type, htab->params->vle_reloc_fixup);
8603 1.1 christos goto copy_reloc;
8604 1.1 christos
8605 1.1 christos /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8606 1.9 christos case R_PPC_EMB_SDA21:
8607 1.3 christos case R_PPC_VLE_SDA21:
8608 1.3 christos case R_PPC_EMB_RELSDA:
8609 1.1 christos case R_PPC_VLE_SDA21_LO:
8610 1.1 christos {
8611 1.1 christos const char *name;
8612 1.1 christos int reg;
8613 1.3 christos unsigned int insn;
8614 1.3 christos struct elf_link_hash_entry *sda = NULL;
8615 1.1 christos
8616 1.1 christos if (sec == NULL || sec->output_section == NULL)
8617 1.1 christos {
8618 1.1 christos unresolved_reloc = TRUE;
8619 1.1 christos break;
8620 1.1 christos }
8621 1.1 christos
8622 1.1 christos name = bfd_section_name (sec->output_section);
8623 1.1 christos if (strcmp (name, ".sdata") == 0
8624 1.1 christos || strcmp (name, ".sbss") == 0)
8625 1.1 christos {
8626 1.7 christos reg = 13;
8627 1.7 christos sda = htab->sdata[0].sym;
8628 1.7 christos }
8629 1.7 christos else if (strcmp (name, ".sdata2") == 0
8630 1.1 christos || strcmp (name, ".sbss2") == 0)
8631 1.1 christos {
8632 1.1 christos reg = 2;
8633 1.1 christos sda = htab->sdata[1].sym;
8634 1.1 christos }
8635 1.1 christos else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8636 1.1 christos || strcmp (name, ".PPC.EMB.sbss0") == 0)
8637 1.3 christos {
8638 1.1 christos reg = 0;
8639 1.1 christos }
8640 1.1 christos else
8641 1.1 christos {
8642 1.1 christos _bfd_error_handler
8643 1.1 christos /* xgettext:c-format */
8644 1.1 christos (_("%pB: the target (%s) of a %s relocation is "
8645 1.1 christos "in the wrong output section (%s)"),
8646 1.1 christos input_bfd,
8647 1.1 christos sym_name,
8648 1.1 christos howto->name,
8649 1.1 christos name);
8650 1.9 christos
8651 1.9 christos bfd_set_error (bfd_error_bad_value);
8652 1.9 christos ret = FALSE;
8653 1.9 christos goto copy_reloc;
8654 1.9 christos }
8655 1.9 christos
8656 1.9 christos if (sda != NULL)
8657 1.9 christos {
8658 1.9 christos if (!is_static_defined (sda))
8659 1.9 christos {
8660 1.9 christos unresolved_reloc = TRUE;
8661 1.9 christos break;
8662 1.9 christos }
8663 1.7 christos addend -= SYM_VAL (sda);
8664 1.1 christos }
8665 1.1 christos
8666 1.1 christos if (r_type == R_PPC_EMB_RELSDA)
8667 1.1 christos break;
8668 1.3 christos
8669 1.3 christos /* The PowerPC Embedded Application Binary Interface
8670 1.3 christos version 1.0 insanely chose to specify R_PPC_EMB_SDA21
8671 1.3 christos operating on a 24-bit field at r_offset. GNU as and
8672 1.3 christos GNU ld have always assumed R_PPC_EMB_SDA21 operates on
8673 1.3 christos a 32-bit bit insn at r_offset. Cope with object file
8674 1.3 christos producers that possibly comply with the EABI in
8675 1.3 christos generating an odd r_offset for big-endian objects. */
8676 1.3 christos if (r_type == R_PPC_EMB_SDA21)
8677 1.3 christos rel->r_offset &= ~1;
8678 1.3 christos
8679 1.3 christos insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8680 1.3 christos if (reg == 0
8681 1.3 christos && (r_type == R_PPC_VLE_SDA21
8682 1.3 christos || r_type == R_PPC_VLE_SDA21_LO))
8683 1.7 christos {
8684 1.3 christos relocation = relocation + addend;
8685 1.3 christos addend = 0;
8686 1.3 christos
8687 1.3 christos /* Force e_li insn, keeping RT from original insn. */
8688 1.3 christos insn &= 0x1f << 21;
8689 1.1 christos insn |= 28u << 26;
8690 1.9 christos
8691 1.9 christos /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8692 1.7 christos /* Top 4 bits of value to 17..20. */
8693 1.1 christos insn |= (relocation & 0xf0000) >> 5;
8694 1.1 christos /* Next 5 bits of the value to 11..15. */
8695 1.1 christos insn |= (relocation & 0xf800) << 5;
8696 1.1 christos /* And the final 11 bits of the value to bits 21 to 31. */
8697 1.1 christos insn |= relocation & 0x7ff;
8698 1.1 christos
8699 1.1 christos bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8700 1.1 christos
8701 1.1 christos if (r_type == R_PPC_VLE_SDA21
8702 1.1 christos && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8703 1.1 christos goto overflow;
8704 1.1 christos goto copy_reloc;
8705 1.1 christos }
8706 1.1 christos /* Fill in register field. */
8707 1.1 christos insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8708 1.1 christos bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8709 1.1 christos }
8710 1.1 christos break;
8711 1.1 christos
8712 1.1 christos case R_PPC_VLE_SDAREL_LO16A:
8713 1.9 christos case R_PPC_VLE_SDAREL_LO16D:
8714 1.3 christos case R_PPC_VLE_SDAREL_HI16A:
8715 1.3 christos case R_PPC_VLE_SDAREL_HI16D:
8716 1.7 christos case R_PPC_VLE_SDAREL_HA16A:
8717 1.3 christos case R_PPC_VLE_SDAREL_HA16D:
8718 1.3 christos {
8719 1.7 christos bfd_vma value;
8720 1.1 christos const char *name;
8721 1.1 christos struct elf_link_hash_entry *sda = NULL;
8722 1.7 christos
8723 1.7 christos if (sec == NULL || sec->output_section == NULL)
8724 1.7 christos {
8725 1.1 christos unresolved_reloc = TRUE;
8726 1.1 christos break;
8727 1.1 christos }
8728 1.1 christos
8729 1.1 christos name = bfd_section_name (sec->output_section);
8730 1.1 christos if (strcmp (name, ".sdata") == 0
8731 1.1 christos || strcmp (name, ".sbss") == 0)
8732 1.1 christos sda = htab->sdata[0].sym;
8733 1.3 christos else if (strcmp (name, ".sdata2") == 0
8734 1.1 christos || strcmp (name, ".sbss2") == 0)
8735 1.1 christos sda = htab->sdata[1].sym;
8736 1.7 christos else
8737 1.1 christos {
8738 1.7 christos _bfd_error_handler
8739 1.7 christos /* xgettext:c-format */
8740 1.1 christos (_("%pB: the target (%s) of a %s relocation is "
8741 1.7 christos "in the wrong output section (%s)"),
8742 1.3 christos input_bfd,
8743 1.3 christos sym_name,
8744 1.7 christos howto->name,
8745 1.7 christos name);
8746 1.7 christos
8747 1.7 christos bfd_set_error (bfd_error_bad_value);
8748 1.3 christos ret = FALSE;
8749 1.7 christos goto copy_reloc;
8750 1.7 christos }
8751 1.7 christos
8752 1.7 christos if (sda == NULL || !is_static_defined (sda))
8753 1.3 christos {
8754 1.3 christos unresolved_reloc = TRUE;
8755 1.3 christos break;
8756 1.7 christos }
8757 1.7 christos value = relocation + addend - SYM_VAL (sda);
8758 1.7 christos
8759 1.7 christos if (r_type == R_PPC_VLE_SDAREL_LO16A)
8760 1.3 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8761 1.3 christos contents + rel->r_offset, value,
8762 1.3 christos split16a_type,
8763 1.3 christos htab->params->vle_reloc_fixup);
8764 1.7 christos else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8765 1.7 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8766 1.7 christos contents + rel->r_offset, value,
8767 1.7 christos split16d_type,
8768 1.3 christos htab->params->vle_reloc_fixup);
8769 1.3 christos else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8770 1.3 christos {
8771 1.3 christos value = value >> 16;
8772 1.7 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8773 1.7 christos contents + rel->r_offset, value,
8774 1.7 christos split16a_type,
8775 1.7 christos htab->params->vle_reloc_fixup);
8776 1.3 christos }
8777 1.3 christos else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8778 1.3 christos {
8779 1.3 christos value = value >> 16;
8780 1.7 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8781 1.7 christos contents + rel->r_offset, value,
8782 1.7 christos split16d_type,
8783 1.7 christos htab->params->vle_reloc_fixup);
8784 1.1 christos }
8785 1.1 christos else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8786 1.3 christos {
8787 1.1 christos value = (value + 0x8000) >> 16;
8788 1.7 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8789 1.7 christos contents + rel->r_offset, value,
8790 1.7 christos split16a_type,
8791 1.7 christos htab->params->vle_reloc_fixup);
8792 1.1 christos }
8793 1.1 christos else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8794 1.1 christos {
8795 1.1 christos value = (value + 0x8000) >> 16;
8796 1.1 christos ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8797 1.1 christos contents + rel->r_offset, value,
8798 1.1 christos split16d_type,
8799 1.1 christos htab->params->vle_reloc_fixup);
8800 1.1 christos }
8801 1.1 christos }
8802 1.1 christos goto copy_reloc;
8803 1.1 christos
8804 1.1 christos case R_PPC_VLE_ADDR20:
8805 1.1 christos ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
8806 1.1 christos continue;
8807 1.1 christos
8808 1.1 christos /* Relocate against the beginning of the section. */
8809 1.1 christos case R_PPC_SECTOFF:
8810 1.1 christos case R_PPC_SECTOFF_LO:
8811 1.1 christos case R_PPC_SECTOFF_HI:
8812 1.1 christos case R_PPC_SECTOFF_HA:
8813 1.1 christos if (sec == NULL || sec->output_section == NULL)
8814 1.1 christos {
8815 1.1 christos unresolved_reloc = TRUE;
8816 1.1 christos break;
8817 1.1 christos }
8818 1.1 christos addend -= sec->output_section->vma;
8819 1.1 christos break;
8820 1.1 christos
8821 1.1 christos /* Negative relocations. */
8822 1.1 christos case R_PPC_EMB_NADDR32:
8823 1.1 christos case R_PPC_EMB_NADDR16:
8824 1.1 christos case R_PPC_EMB_NADDR16_LO:
8825 1.1 christos case R_PPC_EMB_NADDR16_HI:
8826 1.1 christos case R_PPC_EMB_NADDR16_HA:
8827 1.7 christos addend -= 2 * relocation;
8828 1.7 christos break;
8829 1.7 christos
8830 1.1 christos case R_PPC_COPY:
8831 1.1 christos case R_PPC_GLOB_DAT:
8832 1.1 christos case R_PPC_JMP_SLOT:
8833 1.3 christos case R_PPC_RELATIVE:
8834 1.1 christos case R_PPC_IRELATIVE:
8835 1.1 christos case R_PPC_PLT32:
8836 1.7 christos case R_PPC_PLTREL32:
8837 1.7 christos case R_PPC_ADDR30:
8838 1.7 christos case R_PPC_EMB_RELSEC16:
8839 1.7 christos case R_PPC_EMB_RELST_LO:
8840 1.7 christos case R_PPC_EMB_RELST_HI:
8841 1.7 christos case R_PPC_EMB_RELST_HA:
8842 1.7 christos case R_PPC_EMB_BIT_FLD:
8843 1.7 christos /* xgettext:c-format */
8844 1.7 christos _bfd_error_handler (_("%pB: %s unsupported"),
8845 1.7 christos input_bfd, howto->name);
8846 1.7 christos
8847 1.7 christos bfd_set_error (bfd_error_invalid_operation);
8848 1.7 christos ret = FALSE;
8849 1.7 christos goto copy_reloc;
8850 1.7 christos }
8851 1.7 christos
8852 1.7 christos switch (r_type)
8853 1.7 christos {
8854 1.9 christos default:
8855 1.7 christos break;
8856 1.7 christos
8857 1.7 christos case R_PPC_PLTCALL:
8858 1.7 christos if (unresolved_reloc)
8859 1.7 christos {
8860 1.7 christos bfd_byte *p = contents + rel->r_offset;
8861 1.7 christos unsigned int insn = bfd_get_32 (input_bfd, p);
8862 1.7 christos insn &= 1;
8863 1.7 christos bfd_put_32 (input_bfd, B | insn, p);
8864 1.7 christos unresolved_reloc = save_unresolved_reloc;
8865 1.7 christos r_type = R_PPC_REL24;
8866 1.7 christos howto = ppc_elf_howto_table[r_type];
8867 1.7 christos }
8868 1.7 christos else if (htab->plt_type != PLT_NEW)
8869 1.7 christos info->callbacks->einfo
8870 1.7 christos (_("%X%P: %H: %s relocation unsupported for bss-plt\n"),
8871 1.7 christos input_bfd, input_section, rel->r_offset,
8872 1.9 christos howto->name);
8873 1.7 christos break;
8874 1.7 christos
8875 1.7 christos case R_PPC_PLTSEQ:
8876 1.7 christos case R_PPC_PLT16_HA:
8877 1.7 christos case R_PPC_PLT16_LO:
8878 1.1 christos if (unresolved_reloc)
8879 1.1 christos {
8880 1.1 christos bfd_byte *p = contents + (rel->r_offset & ~3);
8881 1.1 christos bfd_put_32 (input_bfd, NOP, p);
8882 1.1 christos unresolved_reloc = FALSE;
8883 1.1 christos r_type = R_PPC_NONE;
8884 1.1 christos howto = ppc_elf_howto_table[r_type];
8885 1.1 christos }
8886 1.3 christos else if (htab->plt_type != PLT_NEW)
8887 1.1 christos info->callbacks->einfo
8888 1.1 christos (_("%X%P: %H: %s relocation unsupported for bss-plt\n"),
8889 1.1 christos input_bfd, input_section, rel->r_offset,
8890 1.1 christos howto->name);
8891 1.1 christos break;
8892 1.1 christos }
8893 1.1 christos
8894 1.1 christos /* Do any further special processing. */
8895 1.1 christos switch (r_type)
8896 1.1 christos {
8897 1.1 christos default:
8898 1.7 christos break;
8899 1.1 christos
8900 1.1 christos case R_PPC_ADDR16_HA:
8901 1.1 christos case R_PPC_REL16_HA:
8902 1.1 christos case R_PPC_REL16DX_HA:
8903 1.1 christos case R_PPC_SECTOFF_HA:
8904 1.1 christos case R_PPC_TPREL16_HA:
8905 1.1 christos case R_PPC_DTPREL16_HA:
8906 1.1 christos case R_PPC_EMB_NADDR16_HA:
8907 1.1 christos case R_PPC_EMB_RELST_HA:
8908 1.1 christos /* It's just possible that this symbol is a weak symbol
8909 1.1 christos that's not actually defined anywhere. In that case,
8910 1.1 christos 'sec' would be NULL, and we should leave the symbol
8911 1.1 christos alone (it will be set to zero elsewhere in the link). */
8912 1.1 christos if (sec == NULL)
8913 1.1 christos break;
8914 1.1 christos /* Fall through. */
8915 1.1 christos
8916 1.1 christos case R_PPC_PLT16_HA:
8917 1.1 christos case R_PPC_GOT16_HA:
8918 1.1 christos case R_PPC_GOT_TLSGD16_HA:
8919 1.1 christos case R_PPC_GOT_TLSLD16_HA:
8920 1.1 christos case R_PPC_GOT_TPREL16_HA:
8921 1.1 christos case R_PPC_GOT_DTPREL16_HA:
8922 1.1 christos /* Add 0x10000 if sign bit in 0:15 is set.
8923 1.1 christos Bits 0:15 are not used. */
8924 1.1 christos addend += 0x8000;
8925 1.1 christos break;
8926 1.1 christos
8927 1.1 christos case R_PPC_ADDR16:
8928 1.1 christos case R_PPC_ADDR16_LO:
8929 1.1 christos case R_PPC_GOT16:
8930 1.1 christos case R_PPC_GOT16_LO:
8931 1.1 christos case R_PPC_SDAREL16:
8932 1.1 christos case R_PPC_SECTOFF:
8933 1.1 christos case R_PPC_SECTOFF_LO:
8934 1.1 christos case R_PPC_DTPREL16:
8935 1.1 christos case R_PPC_DTPREL16_LO:
8936 1.7 christos case R_PPC_TPREL16:
8937 1.3 christos case R_PPC_TPREL16_LO:
8938 1.1 christos case R_PPC_GOT_TLSGD16:
8939 1.1 christos case R_PPC_GOT_TLSGD16_LO:
8940 1.1 christos case R_PPC_GOT_TLSLD16:
8941 1.1 christos case R_PPC_GOT_TLSLD16_LO:
8942 1.1 christos case R_PPC_GOT_DTPREL16:
8943 1.1 christos case R_PPC_GOT_DTPREL16_LO:
8944 1.1 christos case R_PPC_GOT_TPREL16:
8945 1.3 christos case R_PPC_GOT_TPREL16_LO:
8946 1.3 christos {
8947 1.3 christos /* The 32-bit ABI lacks proper relocations to deal with
8948 1.1 christos certain 64-bit instructions. Prevent damage to bits
8949 1.1 christos that make up part of the insn opcode. */
8950 1.3 christos unsigned int insn, mask, lobit;
8951 1.1 christos
8952 1.7 christos insn = bfd_get_32 (input_bfd,
8953 1.7 christos contents + rel->r_offset - d_offset);
8954 1.1 christos mask = 0;
8955 1.1 christos if (is_insn_ds_form (insn))
8956 1.1 christos mask = 3;
8957 1.1 christos else if (is_insn_dq_form (insn))
8958 1.1 christos mask = 15;
8959 1.1 christos else
8960 1.1 christos break;
8961 1.1 christos relocation += addend;
8962 1.1 christos addend = insn & mask;
8963 1.1 christos lobit = mask & relocation;
8964 1.1 christos if (lobit != 0)
8965 1.1 christos {
8966 1.1 christos relocation ^= lobit;
8967 1.1 christos info->callbacks->einfo
8968 1.1 christos /* xgettext:c-format */
8969 1.1 christos (_("%H: error: %s against `%s' not a multiple of %u\n"),
8970 1.1 christos input_bfd, input_section, rel->r_offset,
8971 1.1 christos howto->name, sym_name, mask + 1);
8972 1.1 christos bfd_set_error (bfd_error_bad_value);
8973 1.1 christos ret = FALSE;
8974 1.1 christos }
8975 1.1 christos }
8976 1.1 christos break;
8977 1.1 christos }
8978 1.1 christos
8979 1.1 christos #ifdef DEBUG
8980 1.1 christos fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8981 1.7 christos "offset = %ld, addend = %ld\n",
8982 1.7 christos howto->name,
8983 1.1 christos (int) r_type,
8984 1.1 christos sym_name,
8985 1.1 christos r_symndx,
8986 1.1 christos (long) rel->r_offset,
8987 1.1 christos (long) addend);
8988 1.1 christos #endif
8989 1.3 christos
8990 1.3 christos if (unresolved_reloc
8991 1.3 christos && !((input_section->flags & SEC_DEBUGGING) != 0
8992 1.3 christos && h->def_dynamic)
8993 1.3 christos && _bfd_elf_section_offset (output_bfd, info, input_section,
8994 1.3 christos rel->r_offset) != (bfd_vma) -1)
8995 1.3 christos {
8996 1.3 christos info->callbacks->einfo
8997 1.3 christos /* xgettext:c-format */
8998 1.3 christos (_("%H: unresolvable %s relocation against symbol `%s'\n"),
8999 1.3 christos input_bfd, input_section, rel->r_offset,
9000 1.3 christos howto->name,
9001 1.3 christos sym_name);
9002 1.3 christos ret = FALSE;
9003 1.9 christos }
9004 1.3 christos
9005 1.9 christos /* 16-bit fields in insns mostly have signed values, but a
9006 1.9 christos few insns have 16-bit unsigned values. Really, we should
9007 1.9 christos have different reloc types. */
9008 1.3 christos if (howto->complain_on_overflow != complain_overflow_dont
9009 1.3 christos && howto->dst_mask == 0xffff
9010 1.3 christos && (input_section->flags & SEC_CODE) != 0)
9011 1.3 christos {
9012 1.3 christos enum complain_overflow complain = complain_overflow_signed;
9013 1.3 christos
9014 1.3 christos if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9015 1.3 christos {
9016 1.3 christos unsigned int insn;
9017 1.3 christos
9018 1.3 christos insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9019 1.3 christos if ((insn & (0x3fu << 26)) == 10u << 26 /* cmpli */)
9020 1.3 christos complain = complain_overflow_bitfield;
9021 1.3 christos else if ((insn & (0x3fu << 26)) == 28u << 26 /* andi */
9022 1.3 christos || (insn & (0x3fu << 26)) == 24u << 26 /* ori */
9023 1.3 christos || (insn & (0x3fu << 26)) == 26u << 26 /* xori */)
9024 1.3 christos complain = complain_overflow_unsigned;
9025 1.3 christos }
9026 1.3 christos if (howto->complain_on_overflow != complain)
9027 1.3 christos {
9028 1.3 christos alt_howto = *howto;
9029 1.3 christos alt_howto.complain_on_overflow = complain;
9030 1.3 christos howto = &alt_howto;
9031 1.3 christos }
9032 1.3 christos }
9033 1.3 christos
9034 1.3 christos if (r_type == R_PPC_REL16DX_HA)
9035 1.3 christos {
9036 1.3 christos /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9037 1.3 christos if (rel->r_offset + 4 > input_section->size)
9038 1.3 christos r = bfd_reloc_outofrange;
9039 1.3 christos else
9040 1.3 christos {
9041 1.3 christos unsigned int insn;
9042 1.1 christos
9043 1.1 christos relocation += addend;
9044 1.1 christos relocation -= (rel->r_offset
9045 1.1 christos + input_section->output_offset
9046 1.1 christos + input_section->output_section->vma);
9047 1.3 christos relocation >>= 16;
9048 1.3 christos insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9049 1.3 christos insn &= ~0x1fffc1;
9050 1.3 christos insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9051 1.3 christos bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9052 1.3 christos r = bfd_reloc_ok;
9053 1.3 christos }
9054 1.3 christos }
9055 1.6 christos else
9056 1.6 christos r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9057 1.6 christos rel->r_offset, relocation, addend);
9058 1.1 christos
9059 1.1 christos if (r != bfd_reloc_ok)
9060 1.1 christos {
9061 1.1 christos if (r == bfd_reloc_overflow)
9062 1.7 christos {
9063 1.7 christos overflow:
9064 1.1 christos /* On code like "if (foo) foo();" don't report overflow
9065 1.1 christos on a branch to zero when foo is undefined. */
9066 1.1 christos if (!warned
9067 1.1 christos && !(h != NULL
9068 1.1 christos && (h->root.type == bfd_link_hash_undefweak
9069 1.3 christos || h->root.type == bfd_link_hash_undefined)
9070 1.3 christos && is_branch_reloc (r_type)))
9071 1.3 christos info->callbacks->reloc_overflow
9072 1.3 christos (info, (h ? &h->root : NULL), sym_name, howto->name,
9073 1.3 christos rel->r_addend, input_bfd, input_section, rel->r_offset);
9074 1.3 christos }
9075 1.3 christos else
9076 1.3 christos {
9077 1.3 christos info->callbacks->einfo
9078 1.3 christos /* xgettext:c-format */
9079 1.3 christos (_("%H: %s reloc against `%s': error %d\n"),
9080 1.3 christos input_bfd, input_section, rel->r_offset,
9081 1.3 christos howto->name, sym_name, (int) r);
9082 1.3 christos ret = FALSE;
9083 1.3 christos }
9084 1.3 christos }
9085 1.3 christos copy_reloc:
9086 1.3 christos if (wrel != rel)
9087 1.3 christos *wrel = *rel;
9088 1.3 christos }
9089 1.3 christos
9090 1.3 christos if (wrel != rel)
9091 1.3 christos {
9092 1.3 christos Elf_Internal_Shdr *rel_hdr;
9093 1.3 christos size_t deleted = rel - wrel;
9094 1.1 christos
9095 1.1 christos rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9096 1.1 christos rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9097 1.1 christos if (rel_hdr->sh_size == 0)
9098 1.1 christos {
9099 1.1 christos /* It is too late to remove an empty reloc section. Leave
9100 1.3 christos one NONE reloc.
9101 1.3 christos ??? What is wrong with an empty section??? */
9102 1.3 christos rel_hdr->sh_size = rel_hdr->sh_entsize;
9103 1.3 christos deleted -= 1;
9104 1.3 christos wrel++;
9105 1.3 christos }
9106 1.3 christos relend = wrel;
9107 1.3 christos rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9108 1.3 christos rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9109 1.3 christos input_section->reloc_count -= deleted;
9110 1.3 christos }
9111 1.3 christos
9112 1.3 christos #ifdef DEBUG
9113 1.3 christos fprintf (stderr, "\n");
9114 1.3 christos #endif
9115 1.3 christos
9116 1.3 christos if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9117 1.3 christos && input_section->size != input_section->rawsize
9118 1.3 christos && (strcmp (input_section->output_section->name, ".init") == 0
9119 1.3 christos || strcmp (input_section->output_section->name, ".fini") == 0))
9120 1.3 christos {
9121 1.3 christos /* Branch around the trampolines. */
9122 1.3 christos unsigned int insn = B + input_section->size - input_section->rawsize;
9123 1.3 christos bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9124 1.3 christos }
9125 1.3 christos
9126 1.3 christos if (htab->params->ppc476_workaround
9127 1.3 christos && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9128 1.3 christos && (!bfd_link_relocatable (info)
9129 1.3 christos || (input_section->output_section->alignment_power
9130 1.3 christos >= htab->params->pagesize_p2)))
9131 1.3 christos {
9132 1.3 christos bfd_vma start_addr, end_addr, addr;
9133 1.3 christos bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9134 1.3 christos
9135 1.3 christos if (relax_info->workaround_size != 0)
9136 1.3 christos {
9137 1.3 christos bfd_byte *p;
9138 1.3 christos unsigned int n;
9139 1.3 christos bfd_byte fill[4];
9140 1.3 christos
9141 1.3 christos bfd_put_32 (input_bfd, BA, fill);
9142 1.3 christos p = contents + input_section->size - relax_info->workaround_size;
9143 1.3 christos n = relax_info->workaround_size >> 2;
9144 1.3 christos while (n--)
9145 1.3 christos {
9146 1.3 christos memcpy (p, fill, 4);
9147 1.3 christos p += 4;
9148 1.3 christos }
9149 1.3 christos }
9150 1.3 christos
9151 1.3 christos /* The idea is: Replace the last instruction on a page with a
9152 1.3 christos branch to a patch area. Put the insn there followed by a
9153 1.3 christos branch back to the next page. Complicated a little by
9154 1.3 christos needing to handle moved conditional branches, and by not
9155 1.3 christos wanting to touch data-in-text. */
9156 1.3 christos
9157 1.3 christos start_addr = (input_section->output_section->vma
9158 1.3 christos + input_section->output_offset);
9159 1.3 christos end_addr = (start_addr + input_section->size
9160 1.3 christos - relax_info->workaround_size);
9161 1.3 christos for (addr = ((start_addr & -pagesize) + pagesize - 4);
9162 1.3 christos addr < end_addr;
9163 1.3 christos addr += pagesize)
9164 1.3 christos {
9165 1.3 christos bfd_vma offset = addr - start_addr;
9166 1.3 christos Elf_Internal_Rela *lo, *hi;
9167 1.3 christos bfd_boolean is_data;
9168 1.3 christos bfd_vma patch_off, patch_addr;
9169 1.3 christos unsigned int insn;
9170 1.3 christos
9171 1.3 christos /* Do we have a data reloc at this offset? If so, leave
9172 1.3 christos the word alone. */
9173 1.3 christos is_data = FALSE;
9174 1.3 christos lo = relocs;
9175 1.3 christos hi = relend;
9176 1.3 christos rel = NULL;
9177 1.3 christos while (lo < hi)
9178 1.3 christos {
9179 1.3 christos rel = lo + (hi - lo) / 2;
9180 1.3 christos if (rel->r_offset < offset)
9181 1.3 christos lo = rel + 1;
9182 1.3 christos else if (rel->r_offset > offset + 3)
9183 1.3 christos hi = rel;
9184 1.3 christos else
9185 1.3 christos {
9186 1.3 christos switch (ELF32_R_TYPE (rel->r_info))
9187 1.3 christos {
9188 1.3 christos case R_PPC_ADDR32:
9189 1.3 christos case R_PPC_UADDR32:
9190 1.3 christos case R_PPC_REL32:
9191 1.3 christos case R_PPC_ADDR30:
9192 1.3 christos is_data = TRUE;
9193 1.3 christos break;
9194 1.3 christos default:
9195 1.3 christos break;
9196 1.3 christos }
9197 1.3 christos break;
9198 1.3 christos }
9199 1.3 christos }
9200 1.3 christos if (is_data)
9201 1.3 christos continue;
9202 1.3 christos
9203 1.3 christos /* Some instructions can be left alone too. Unconditional
9204 1.3 christos branches, except for bcctr with BO=0x14 (bctr, bctrl),
9205 1.3 christos avoid the icache failure.
9206 1.3 christos
9207 1.3 christos The problem occurs due to prefetch across a page boundary
9208 1.3 christos where stale instructions can be fetched from the next
9209 1.3 christos page, and the mechanism for flushing these bad
9210 1.3 christos instructions fails under certain circumstances. The
9211 1.3 christos unconditional branches:
9212 1.3 christos 1) Branch: b, bl, ba, bla,
9213 1.3 christos 2) Branch Conditional: bc, bca, bcl, bcla,
9214 1.3 christos 3) Branch Conditional to Link Register: bclr, bclrl,
9215 1.3 christos where (2) and (3) have BO=0x14 making them unconditional,
9216 1.3 christos prevent the bad prefetch because the prefetch itself is
9217 1.3 christos affected by these instructions. This happens even if the
9218 1.3 christos instruction is not executed.
9219 1.3 christos
9220 1.3 christos A bctr example:
9221 1.3 christos .
9222 1.3 christos . lis 9,new_page@ha
9223 1.3 christos . addi 9,9,new_page@l
9224 1.3 christos . mtctr 9
9225 1.3 christos . bctr
9226 1.3 christos . nop
9227 1.3 christos . nop
9228 1.3 christos . new_page:
9229 1.3 christos .
9230 1.3 christos The bctr is not predicted taken due to ctr not being
9231 1.9 christos ready, so prefetch continues on past the bctr into the
9232 1.9 christos new page which might have stale instructions. If they
9233 1.7 christos fail to be flushed, then they will be executed after the
9234 1.9 christos bctr executes. Either of the following modifications
9235 1.3 christos prevent the bad prefetch from happening in the first
9236 1.7 christos place:
9237 1.3 christos .
9238 1.3 christos . lis 9,new_page@ha lis 9,new_page@ha
9239 1.3 christos . addi 9,9,new_page@l addi 9,9,new_page@l
9240 1.3 christos . mtctr 9 mtctr 9
9241 1.3 christos . bctr bctr
9242 1.3 christos . nop b somewhere_else
9243 1.3 christos . b somewhere_else nop
9244 1.3 christos . new_page: new_page:
9245 1.3 christos . */
9246 1.3 christos insn = bfd_get_32 (input_bfd, contents + offset);
9247 1.3 christos if ((insn & (0x3fu << 26)) == (18u << 26) /* b,bl,ba,bla */
9248 1.3 christos || ((insn & (0x3fu << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9249 1.3 christos && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9250 1.3 christos || ((insn & (0x3fu << 26)) == (19u << 26)
9251 1.3 christos && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9252 1.3 christos && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9253 1.3 christos continue;
9254 1.3 christos
9255 1.3 christos patch_addr = (start_addr + input_section->size
9256 1.3 christos - relax_info->workaround_size);
9257 1.3 christos patch_addr = (patch_addr + 15) & -16;
9258 1.3 christos patch_off = patch_addr - start_addr;
9259 1.3 christos bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9260 1.3 christos
9261 1.3 christos if (rel != NULL
9262 1.3 christos && rel->r_offset >= offset
9263 1.3 christos && rel->r_offset < offset + 4)
9264 1.3 christos {
9265 1.3 christos asection *sreloc;
9266 1.3 christos
9267 1.3 christos /* If the insn we are patching had a reloc, adjust the
9268 1.3 christos reloc r_offset so that the reloc applies to the moved
9269 1.3 christos location. This matters for -r and --emit-relocs. */
9270 1.3 christos if (rel + 1 != relend)
9271 1.3 christos {
9272 1.3 christos Elf_Internal_Rela tmp = *rel;
9273 1.3 christos
9274 1.3 christos /* Keep the relocs sorted by r_offset. */
9275 1.3 christos memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9276 1.3 christos relend[-1] = tmp;
9277 1.3 christos }
9278 1.3 christos relend[-1].r_offset += patch_off - offset;
9279 1.3 christos
9280 1.3 christos /* Adjust REL16 addends too. */
9281 1.3 christos switch (ELF32_R_TYPE (relend[-1].r_info))
9282 1.3 christos {
9283 1.3 christos case R_PPC_REL16:
9284 1.3 christos case R_PPC_REL16_LO:
9285 1.3 christos case R_PPC_REL16_HI:
9286 1.3 christos case R_PPC_REL16_HA:
9287 1.3 christos relend[-1].r_addend += patch_off - offset;
9288 1.3 christos break;
9289 1.3 christos default:
9290 1.3 christos break;
9291 1.3 christos }
9292 1.3 christos
9293 1.3 christos /* If we are building a PIE or shared library with
9294 1.3 christos non-PIC objects, perhaps we had a dynamic reloc too?
9295 1.3 christos If so, the dynamic reloc must move with the insn. */
9296 1.3 christos sreloc = elf_section_data (input_section)->sreloc;
9297 1.3 christos if (sreloc != NULL)
9298 1.3 christos {
9299 1.3 christos Elf32_External_Rela *slo, *shi, *srelend;
9300 1.3 christos bfd_vma soffset;
9301 1.3 christos
9302 1.3 christos slo = (Elf32_External_Rela *) sreloc->contents;
9303 1.3 christos shi = srelend = slo + sreloc->reloc_count;
9304 1.3 christos soffset = (offset + input_section->output_section->vma
9305 1.3 christos + input_section->output_offset);
9306 1.3 christos while (slo < shi)
9307 1.3 christos {
9308 1.3 christos Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9309 1.3 christos bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9310 1.3 christos &outrel);
9311 1.3 christos if (outrel.r_offset < soffset)
9312 1.3 christos slo = srel + 1;
9313 1.3 christos else if (outrel.r_offset > soffset + 3)
9314 1.3 christos shi = srel;
9315 1.3 christos else
9316 1.3 christos {
9317 1.3 christos if (srel + 1 != srelend)
9318 1.9 christos {
9319 1.3 christos memmove (srel, srel + 1,
9320 1.3 christos (srelend - (srel + 1)) * sizeof (*srel));
9321 1.3 christos srel = srelend - 1;
9322 1.3 christos }
9323 1.3 christos outrel.r_offset += patch_off - offset;
9324 1.3 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9325 1.3 christos (bfd_byte *) srel);
9326 1.3 christos break;
9327 1.3 christos }
9328 1.3 christos }
9329 1.3 christos }
9330 1.3 christos }
9331 1.3 christos else
9332 1.3 christos rel = NULL;
9333 1.3 christos
9334 1.3 christos if ((insn & (0x3fu << 26)) == (16u << 26) /* bc */
9335 1.3 christos && (insn & 2) == 0 /* relative */)
9336 1.3 christos {
9337 1.3 christos bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9338 1.3 christos
9339 1.3 christos delta += offset - patch_off;
9340 1.3 christos if (bfd_link_relocatable (info) && rel != NULL)
9341 1.3 christos delta = 0;
9342 1.3 christos if (!bfd_link_relocatable (info) && rel != NULL)
9343 1.3 christos {
9344 1.3 christos enum elf_ppc_reloc_type r_type;
9345 1.3 christos
9346 1.3 christos r_type = ELF32_R_TYPE (relend[-1].r_info);
9347 1.3 christos if (r_type == R_PPC_REL14_BRTAKEN)
9348 1.3 christos insn |= BRANCH_PREDICT_BIT;
9349 1.3 christos else if (r_type == R_PPC_REL14_BRNTAKEN)
9350 1.3 christos insn &= ~BRANCH_PREDICT_BIT;
9351 1.3 christos else
9352 1.3 christos BFD_ASSERT (r_type == R_PPC_REL14);
9353 1.3 christos
9354 1.3 christos if ((r_type == R_PPC_REL14_BRTAKEN
9355 1.3 christos || r_type == R_PPC_REL14_BRNTAKEN)
9356 1.3 christos && delta + 0x8000 < 0x10000
9357 1.3 christos && (bfd_signed_vma) delta < 0)
9358 1.3 christos insn ^= BRANCH_PREDICT_BIT;
9359 1.3 christos }
9360 1.3 christos if (delta + 0x8000 < 0x10000)
9361 1.3 christos {
9362 1.3 christos bfd_put_32 (input_bfd,
9363 1.3 christos (insn & ~0xfffc) | (delta & 0xfffc),
9364 1.3 christos contents + patch_off);
9365 1.3 christos patch_off += 4;
9366 1.3 christos bfd_put_32 (input_bfd,
9367 1.3 christos B | ((offset + 4 - patch_off) & 0x3fffffc),
9368 1.3 christos contents + patch_off);
9369 1.3 christos patch_off += 4;
9370 1.3 christos }
9371 1.3 christos else
9372 1.3 christos {
9373 1.3 christos if (rel != NULL)
9374 1.3 christos {
9375 1.3 christos unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9376 1.3 christos
9377 1.3 christos relend[-1].r_offset += 8;
9378 1.3 christos relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9379 1.3 christos }
9380 1.3 christos bfd_put_32 (input_bfd,
9381 1.3 christos (insn & ~0xfffc) | 8,
9382 1.3 christos contents + patch_off);
9383 1.3 christos patch_off += 4;
9384 1.3 christos bfd_put_32 (input_bfd,
9385 1.3 christos B | ((offset + 4 - patch_off) & 0x3fffffc),
9386 1.3 christos contents + patch_off);
9387 1.3 christos patch_off += 4;
9388 1.3 christos bfd_put_32 (input_bfd,
9389 1.3 christos B | ((delta - 8) & 0x3fffffc),
9390 1.3 christos contents + patch_off);
9391 1.3 christos patch_off += 4;
9392 1.1 christos }
9393 1.1 christos }
9394 1.1 christos else
9395 1.7 christos {
9396 1.1 christos bfd_put_32 (input_bfd, insn, contents + patch_off);
9397 1.1 christos patch_off += 4;
9398 1.7 christos bfd_put_32 (input_bfd,
9399 1.1 christos B | ((offset + 4 - patch_off) & 0x3fffffc),
9400 1.7 christos contents + patch_off);
9401 1.7 christos patch_off += 4;
9402 1.1 christos }
9403 1.1 christos BFD_ASSERT (patch_off <= input_section->size);
9404 1.1 christos relax_info->workaround_size = input_section->size - patch_off;
9405 1.1 christos }
9406 1.1 christos }
9407 1.1 christos
9408 1.1 christos return ret;
9409 1.1 christos }
9410 1.1 christos
9411 1.1 christos /* Write out the PLT relocs and entries for H. */
9413 1.1 christos
9414 1.7 christos static bfd_boolean
9415 1.7 christos write_global_sym_plt (struct elf_link_hash_entry *h, void *inf)
9416 1.1 christos {
9417 1.1 christos struct bfd_link_info *info = (struct bfd_link_info *) inf;
9418 1.1 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9419 1.1 christos struct plt_entry *ent;
9420 1.1 christos bfd_boolean doneone;
9421 1.1 christos
9422 1.1 christos doneone = FALSE;
9423 1.1 christos for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9424 1.1 christos if (ent->plt.offset != (bfd_vma) -1)
9425 1.1 christos {
9426 1.1 christos if (!doneone)
9427 1.1 christos {
9428 1.1 christos Elf_Internal_Rela rela;
9429 1.1 christos bfd_byte *loc;
9430 1.1 christos bfd_vma reloc_index;
9431 1.1 christos asection *plt = htab->elf.splt;
9432 1.1 christos asection *relplt = htab->elf.srelplt;
9433 1.1 christos
9434 1.1 christos if (htab->plt_type == PLT_NEW
9435 1.1 christos || !htab->elf.dynamic_sections_created
9436 1.1 christos || h->dynindx == -1)
9437 1.1 christos reloc_index = ent->plt.offset / 4;
9438 1.1 christos else
9439 1.1 christos {
9440 1.1 christos reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9441 1.1 christos / htab->plt_slot_size);
9442 1.1 christos if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9443 1.3 christos && htab->plt_type == PLT_OLD)
9444 1.1 christos reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9445 1.1 christos }
9446 1.1 christos
9447 1.3 christos /* This symbol has an entry in the procedure linkage table.
9448 1.1 christos Set it up. */
9449 1.7 christos if (htab->plt_type == PLT_VXWORKS
9450 1.1 christos && htab->elf.dynamic_sections_created
9451 1.7 christos && h->dynindx != -1)
9452 1.7 christos {
9453 1.1 christos bfd_vma got_offset;
9454 1.7 christos const bfd_vma *plt_entry;
9455 1.1 christos
9456 1.1 christos /* The first three entries in .got.plt are reserved. */
9457 1.1 christos got_offset = (reloc_index + 3) * 4;
9458 1.1 christos
9459 1.1 christos /* Use the right PLT. */
9460 1.7 christos plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
9461 1.1 christos : ppc_elf_vxworks_plt_entry;
9462 1.7 christos
9463 1.7 christos /* Fill in the .plt on VxWorks. */
9464 1.1 christos if (bfd_link_pic (info))
9465 1.7 christos {
9466 1.1 christos bfd_put_32 (info->output_bfd,
9467 1.1 christos plt_entry[0] | PPC_HA (got_offset),
9468 1.7 christos plt->contents + ent->plt.offset + 0);
9469 1.7 christos bfd_put_32 (info->output_bfd,
9470 1.7 christos plt_entry[1] | PPC_LO (got_offset),
9471 1.7 christos plt->contents + ent->plt.offset + 4);
9472 1.1 christos }
9473 1.1 christos else
9474 1.1 christos {
9475 1.1 christos bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9476 1.1 christos
9477 1.1 christos bfd_put_32 (info->output_bfd,
9478 1.1 christos plt_entry[0] | PPC_HA (got_loc),
9479 1.7 christos plt->contents + ent->plt.offset + 0);
9480 1.1 christos bfd_put_32 (info->output_bfd,
9481 1.7 christos plt_entry[1] | PPC_LO (got_loc),
9482 1.1 christos plt->contents + ent->plt.offset + 4);
9483 1.1 christos }
9484 1.1 christos
9485 1.1 christos bfd_put_32 (info->output_bfd, plt_entry[2],
9486 1.1 christos plt->contents + ent->plt.offset + 8);
9487 1.1 christos bfd_put_32 (info->output_bfd, plt_entry[3],
9488 1.7 christos plt->contents + ent->plt.offset + 12);
9489 1.1 christos
9490 1.1 christos /* This instruction is an immediate load. The value loaded is
9491 1.7 christos the byte offset of the R_PPC_JMP_SLOT relocation from the
9492 1.7 christos start of the .rela.plt section. The value is stored in the
9493 1.7 christos low-order 16 bits of the load instruction. */
9494 1.7 christos /* NOTE: It appears that this is now an index rather than a
9495 1.7 christos prescaled offset. */
9496 1.1 christos bfd_put_32 (info->output_bfd,
9497 1.1 christos plt_entry[4] | reloc_index,
9498 1.1 christos plt->contents + ent->plt.offset + 16);
9499 1.1 christos /* This instruction is a PC-relative branch whose target is
9500 1.7 christos the start of the PLT section. The address of this branch
9501 1.7 christos instruction is 20 bytes beyond the start of this PLT entry.
9502 1.7 christos The address is encoded in bits 6-29, inclusive. The value
9503 1.7 christos stored is right-shifted by two bits, permitting a 26-bit
9504 1.1 christos offset. */
9505 1.3 christos bfd_put_32 (info->output_bfd,
9506 1.1 christos (plt_entry[5]
9507 1.1 christos | (-(ent->plt.offset + 20) & 0x03fffffc)),
9508 1.1 christos plt->contents + ent->plt.offset + 20);
9509 1.1 christos bfd_put_32 (info->output_bfd, plt_entry[6],
9510 1.1 christos plt->contents + ent->plt.offset + 24);
9511 1.1 christos bfd_put_32 (info->output_bfd, plt_entry[7],
9512 1.1 christos plt->contents + ent->plt.offset + 28);
9513 1.1 christos
9514 1.7 christos /* Fill in the GOT entry corresponding to this PLT slot with
9515 1.7 christos the address immediately after the "bctr" instruction
9516 1.1 christos in this PLT entry. */
9517 1.1 christos bfd_put_32 (info->output_bfd, (plt->output_section->vma
9518 1.1 christos + plt->output_offset
9519 1.1 christos + ent->plt.offset + 16),
9520 1.7 christos htab->elf.sgotplt->contents + got_offset);
9521 1.1 christos
9522 1.1 christos if (!bfd_link_pic (info))
9523 1.1 christos {
9524 1.7 christos /* Fill in a couple of entries in .rela.plt.unloaded. */
9525 1.7 christos loc = htab->srelplt2->contents
9526 1.1 christos + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9527 1.1 christos * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9528 1.1 christos * sizeof (Elf32_External_Rela));
9529 1.1 christos
9530 1.7 christos /* Provide the @ha relocation for the first instruction. */
9531 1.1 christos rela.r_offset = (plt->output_section->vma
9532 1.1 christos + plt->output_offset
9533 1.1 christos + ent->plt.offset + 2);
9534 1.1 christos rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9535 1.7 christos R_PPC_ADDR16_HA);
9536 1.7 christos rela.r_addend = got_offset;
9537 1.1 christos bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9538 1.1 christos loc += sizeof (Elf32_External_Rela);
9539 1.1 christos
9540 1.1 christos /* Provide the @l relocation for the second instruction. */
9541 1.7 christos rela.r_offset = (plt->output_section->vma
9542 1.1 christos + plt->output_offset
9543 1.1 christos + ent->plt.offset + 6);
9544 1.1 christos rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9545 1.1 christos R_PPC_ADDR16_LO);
9546 1.1 christos rela.r_addend = got_offset;
9547 1.1 christos bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9548 1.1 christos loc += sizeof (Elf32_External_Rela);
9549 1.7 christos
9550 1.7 christos /* Provide a relocation for the GOT entry corresponding to this
9551 1.1 christos PLT slot. Point it at the middle of the .plt entry. */
9552 1.7 christos rela.r_offset = (htab->elf.sgotplt->output_section->vma
9553 1.1 christos + htab->elf.sgotplt->output_offset
9554 1.1 christos + got_offset);
9555 1.1 christos rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9556 1.7 christos R_PPC_ADDR32);
9557 1.1 christos rela.r_addend = ent->plt.offset + 16;
9558 1.1 christos bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9559 1.7 christos }
9560 1.7 christos
9561 1.7 christos /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9562 1.7 christos In particular, the offset for the relocation is not the
9563 1.7 christos address of the PLT entry for this function, as specified
9564 1.7 christos by the ABI. Instead, the offset is set to the address of
9565 1.7 christos the GOT slot for this function. See EABI 4.4.4.1. */
9566 1.7 christos rela.r_offset = (htab->elf.sgotplt->output_section->vma
9567 1.7 christos + htab->elf.sgotplt->output_offset
9568 1.7 christos + got_offset);
9569 1.7 christos rela.r_addend = 0;
9570 1.7 christos }
9571 1.7 christos else
9572 1.7 christos {
9573 1.7 christos rela.r_addend = 0;
9574 1.7 christos if (!htab->elf.dynamic_sections_created
9575 1.1 christos || h->dynindx == -1)
9576 1.7 christos {
9577 1.1 christos if (h->type == STT_GNU_IFUNC)
9578 1.7 christos {
9579 1.7 christos plt = htab->elf.iplt;
9580 1.1 christos relplt = htab->elf.irelplt;
9581 1.1 christos }
9582 1.1 christos else
9583 1.7 christos {
9584 1.7 christos plt = htab->pltlocal;
9585 1.7 christos relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
9586 1.7 christos }
9587 1.7 christos if (h->def_regular
9588 1.7 christos && (h->root.type == bfd_link_hash_defined
9589 1.7 christos || h->root.type == bfd_link_hash_defweak))
9590 1.7 christos rela.r_addend = SYM_VAL (h);
9591 1.7 christos }
9592 1.7 christos
9593 1.7 christos if (relplt == NULL)
9594 1.7 christos {
9595 1.7 christos loc = plt->contents + ent->plt.offset;
9596 1.7 christos bfd_put_32 (info->output_bfd, rela.r_addend, loc);
9597 1.7 christos }
9598 1.7 christos else
9599 1.7 christos {
9600 1.7 christos rela.r_offset = (plt->output_section->vma
9601 1.7 christos + plt->output_offset
9602 1.1 christos + ent->plt.offset);
9603 1.1 christos
9604 1.1 christos if (htab->plt_type == PLT_OLD
9605 1.7 christos || !htab->elf.dynamic_sections_created
9606 1.1 christos || h->dynindx == -1)
9607 1.7 christos {
9608 1.7 christos /* We don't need to fill in the .plt. The ppc dynamic
9609 1.7 christos linker will fill it in. */
9610 1.7 christos }
9611 1.7 christos else
9612 1.7 christos {
9613 1.7 christos bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9614 1.7 christos + htab->glink->output_section->vma
9615 1.7 christos + htab->glink->output_offset);
9616 1.7 christos bfd_put_32 (info->output_bfd, val,
9617 1.7 christos plt->contents + ent->plt.offset);
9618 1.7 christos }
9619 1.7 christos }
9620 1.1 christos }
9621 1.7 christos
9622 1.7 christos if (relplt != NULL)
9623 1.7 christos {
9624 1.7 christos /* Fill in the entry in the .rela.plt section. */
9625 1.7 christos if (!htab->elf.dynamic_sections_created
9626 1.1 christos || h->dynindx == -1)
9627 1.7 christos {
9628 1.1 christos if (h->type == STT_GNU_IFUNC)
9629 1.1 christos rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9630 1.1 christos else
9631 1.1 christos rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9632 1.1 christos loc = relplt->contents + (relplt->reloc_count++
9633 1.1 christos * sizeof (Elf32_External_Rela));
9634 1.1 christos htab->local_ifunc_resolver = 1;
9635 1.1 christos }
9636 1.1 christos else
9637 1.7 christos {
9638 1.7 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9639 1.1 christos loc = relplt->contents + (reloc_index
9640 1.1 christos * sizeof (Elf32_External_Rela));
9641 1.1 christos if (h->type == STT_GNU_IFUNC && is_static_defined (h))
9642 1.7 christos htab->maybe_local_ifunc_resolver = 1;
9643 1.7 christos }
9644 1.7 christos bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9645 1.7 christos }
9646 1.1 christos doneone = TRUE;
9647 1.1 christos }
9648 1.7 christos
9649 1.7 christos if (htab->plt_type == PLT_NEW
9650 1.1 christos || !htab->elf.dynamic_sections_created
9651 1.3 christos || h->dynindx == -1)
9652 1.1 christos {
9653 1.1 christos unsigned char *p;
9654 1.1 christos asection *plt = htab->elf.splt;
9655 1.1 christos
9656 1.1 christos if (!htab->elf.dynamic_sections_created
9657 1.1 christos || h->dynindx == -1)
9658 1.7 christos {
9659 1.7 christos if (h->type == STT_GNU_IFUNC)
9660 1.7 christos plt = htab->elf.iplt;
9661 1.7 christos else
9662 1.7 christos break;
9663 1.7 christos }
9664 1.7 christos
9665 1.7 christos p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9666 1.7 christos write_glink_stub (h, ent, plt, p, info);
9667 1.7 christos
9668 1.7 christos if (!bfd_link_pic (info))
9669 1.7 christos /* We only need one non-PIC glink stub. */
9670 1.7 christos break;
9671 1.7 christos }
9672 1.7 christos else
9673 1.7 christos break;
9674 1.7 christos }
9675 1.7 christos return TRUE;
9676 1.7 christos }
9677 1.7 christos
9678 1.7 christos /* Finish up PLT handling. */
9679 1.7 christos
9680 1.7 christos bfd_boolean
9681 1.7 christos ppc_finish_symbols (struct bfd_link_info *info)
9682 1.7 christos {
9683 1.7 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9684 1.7 christos bfd *ibfd;
9685 1.7 christos
9686 1.7 christos if (!htab)
9687 1.7 christos return TRUE;
9688 1.7 christos
9689 1.7 christos elf_link_hash_traverse (&htab->elf, write_global_sym_plt, info);
9690 1.7 christos
9691 1.7 christos for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9692 1.7 christos {
9693 1.7 christos bfd_vma *local_got, *end_local_got;
9694 1.7 christos struct plt_entry **local_plt, **lplt, **end_local_plt;
9695 1.7 christos Elf_Internal_Shdr *symtab_hdr;
9696 1.7 christos bfd_size_type locsymcount;
9697 1.7 christos Elf_Internal_Sym *local_syms = NULL;
9698 1.7 christos struct plt_entry *ent;
9699 1.7 christos
9700 1.7 christos if (!is_ppc_elf (ibfd))
9701 1.7 christos continue;
9702 1.7 christos
9703 1.7 christos local_got = elf_local_got_offsets (ibfd);
9704 1.7 christos if (!local_got)
9705 1.7 christos continue;
9706 1.9 christos
9707 1.7 christos symtab_hdr = &elf_symtab_hdr (ibfd);
9708 1.7 christos locsymcount = symtab_hdr->sh_info;
9709 1.7 christos end_local_got = local_got + locsymcount;
9710 1.7 christos local_plt = (struct plt_entry **) end_local_got;
9711 1.7 christos end_local_plt = local_plt + locsymcount;
9712 1.7 christos for (lplt = local_plt; lplt < end_local_plt; ++lplt)
9713 1.7 christos for (ent = *lplt; ent != NULL; ent = ent->next)
9714 1.7 christos {
9715 1.7 christos if (ent->plt.offset != (bfd_vma) -1)
9716 1.7 christos {
9717 1.7 christos Elf_Internal_Sym *sym;
9718 1.7 christos asection *sym_sec;
9719 1.7 christos asection *plt, *relplt;
9720 1.7 christos bfd_byte *loc;
9721 1.7 christos bfd_vma val;
9722 1.7 christos Elf_Internal_Rela rela;
9723 1.7 christos unsigned char *p;
9724 1.7 christos
9725 1.7 christos if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
9726 1.7 christos lplt - local_plt, ibfd))
9727 1.7 christos {
9728 1.7 christos if (local_syms != NULL
9729 1.7 christos && symtab_hdr->contents != (unsigned char *) local_syms)
9730 1.7 christos free (local_syms);
9731 1.7 christos return FALSE;
9732 1.7 christos }
9733 1.7 christos
9734 1.7 christos val = sym->st_value;
9735 1.7 christos if (sym_sec != NULL && sym_sec->output_section != NULL)
9736 1.7 christos val += sym_sec->output_offset + sym_sec->output_section->vma;
9737 1.7 christos
9738 1.7 christos if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9739 1.7 christos {
9740 1.7 christos htab->local_ifunc_resolver = 1;
9741 1.7 christos plt = htab->elf.iplt;
9742 1.7 christos relplt = htab->elf.irelplt;
9743 1.7 christos rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9744 1.7 christos }
9745 1.7 christos else
9746 1.7 christos {
9747 1.7 christos plt = htab->pltlocal;
9748 1.7 christos if (bfd_link_pic (info))
9749 1.7 christos {
9750 1.7 christos relplt = htab->relpltlocal;
9751 1.7 christos rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9752 1.9 christos }
9753 1.7 christos else
9754 1.7 christos {
9755 1.7 christos loc = plt->contents + ent->plt.offset;
9756 1.7 christos bfd_put_32 (info->output_bfd, val, loc);
9757 1.7 christos continue;
9758 1.7 christos }
9759 1.7 christos }
9760 1.7 christos
9761 1.7 christos rela.r_offset = (ent->plt.offset
9762 1.7 christos + plt->output_offset
9763 1.7 christos + plt->output_section->vma);
9764 1.7 christos rela.r_addend = val;
9765 1.7 christos loc = relplt->contents + (relplt->reloc_count++
9766 1.7 christos * sizeof (Elf32_External_Rela));
9767 1.7 christos bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9768 1.7 christos
9769 1.7 christos p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9770 1.7 christos write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
9771 1.7 christos }
9772 1.7 christos }
9773 1.7 christos
9774 1.7 christos if (local_syms != NULL
9775 1.7 christos && symtab_hdr->contents != (unsigned char *) local_syms)
9776 1.7 christos {
9777 1.7 christos if (!info->keep_memory)
9778 1.7 christos free (local_syms);
9779 1.7 christos else
9780 1.7 christos symtab_hdr->contents = (unsigned char *) local_syms;
9781 1.7 christos }
9782 1.7 christos }
9783 1.7 christos return TRUE;
9784 1.7 christos }
9785 1.7 christos
9786 1.7 christos /* Finish up dynamic symbol handling. We set the contents of various
9787 1.7 christos dynamic sections here. */
9788 1.7 christos
9789 1.7 christos static bfd_boolean
9790 1.7 christos ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9791 1.7 christos struct bfd_link_info *info,
9792 1.7 christos struct elf_link_hash_entry *h,
9793 1.7 christos Elf_Internal_Sym *sym)
9794 1.7 christos {
9795 1.7 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9796 1.7 christos struct plt_entry *ent;
9797 1.7 christos
9798 1.7 christos #ifdef DEBUG
9799 1.7 christos fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9800 1.7 christos h->root.root.string);
9801 1.7 christos #endif
9802 1.7 christos
9803 1.7 christos if (!h->def_regular
9804 1.7 christos || (h->type == STT_GNU_IFUNC && !bfd_link_pic (info)))
9805 1.7 christos for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9806 1.7 christos if (ent->plt.offset != (bfd_vma) -1)
9807 1.7 christos {
9808 1.7 christos if (!h->def_regular)
9809 1.7 christos {
9810 1.7 christos /* Mark the symbol as undefined, rather than as
9811 1.7 christos defined in the .plt section. Leave the value if
9812 1.7 christos there were any relocations where pointer equality
9813 1.7 christos matters (this is a clue for the dynamic linker, to
9814 1.7 christos make function pointer comparisons work between an
9815 1.7 christos application and shared library), otherwise set it
9816 1.7 christos to zero. */
9817 1.7 christos sym->st_shndx = SHN_UNDEF;
9818 1.7 christos if (!h->pointer_equality_needed)
9819 1.7 christos sym->st_value = 0;
9820 1.7 christos else if (!h->ref_regular_nonweak)
9821 1.7 christos {
9822 1.7 christos /* This breaks function pointer comparisons, but
9823 1.7 christos that is better than breaking tests for a NULL
9824 1.7 christos function pointer. */
9825 1.7 christos sym->st_value = 0;
9826 1.7 christos }
9827 1.7 christos }
9828 1.7 christos else
9829 1.1 christos {
9830 1.1 christos /* Set the value of ifunc symbols in a non-pie
9831 1.1 christos executable to the glink entry. This is to avoid
9832 1.1 christos text relocations. We can't do this for ifunc in
9833 1.1 christos allocate_dynrelocs, as we do for normal dynamic
9834 1.1 christos function symbols with plt entries, because we need
9835 1.1 christos to keep the original value around for the ifunc
9836 1.1 christos relocation. */
9837 1.1 christos sym->st_shndx
9838 1.1 christos = (_bfd_elf_section_from_bfd_section
9839 1.1 christos (info->output_bfd, htab->glink->output_section));
9840 1.1 christos sym->st_value = (ent->glink_offset
9841 1.1 christos + htab->glink->output_offset
9842 1.1 christos + htab->glink->output_section->vma);
9843 1.1 christos }
9844 1.1 christos break;
9845 1.1 christos }
9846 1.7 christos
9847 1.7 christos if (h->needs_copy)
9848 1.1 christos {
9849 1.7 christos asection *s;
9850 1.1 christos Elf_Internal_Rela rela;
9851 1.1 christos bfd_byte *loc;
9852 1.1 christos
9853 1.1 christos /* This symbols needs a copy reloc. Set it up. */
9854 1.1 christos
9855 1.1 christos #ifdef DEBUG
9856 1.1 christos fprintf (stderr, ", copy");
9857 1.1 christos #endif
9858 1.1 christos
9859 1.1 christos BFD_ASSERT (h->dynindx != -1);
9860 1.1 christos
9861 1.1 christos if (ppc_elf_hash_entry (h)->has_sda_refs)
9862 1.1 christos s = htab->relsbss;
9863 1.1 christos else if (h->root.u.def.section == htab->elf.sdynrelro)
9864 1.1 christos s = htab->elf.sreldynrelro;
9865 1.1 christos else
9866 1.1 christos s = htab->elf.srelbss;
9867 1.3 christos BFD_ASSERT (s != NULL);
9868 1.3 christos
9869 1.3 christos rela.r_offset = SYM_VAL (h);
9870 1.1 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9871 1.3 christos rela.r_addend = 0;
9872 1.3 christos loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9873 1.7 christos bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9874 1.3 christos }
9875 1.3 christos
9876 1.1 christos #ifdef DEBUG
9877 1.1 christos fprintf (stderr, "\n");
9878 1.1 christos #endif
9879 1.1 christos
9880 1.1 christos return TRUE;
9881 1.1 christos }
9882 1.1 christos
9883 1.1 christos static enum elf_reloc_type_class
9885 1.1 christos ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9886 1.1 christos const asection *rel_sec,
9887 1.1 christos const Elf_Internal_Rela *rela)
9888 1.1 christos {
9889 1.1 christos struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9890 1.1 christos
9891 1.1 christos if (rel_sec == htab->elf.irelplt)
9892 1.1 christos return reloc_class_ifunc;
9893 1.1 christos
9894 1.1 christos switch (ELF32_R_TYPE (rela->r_info))
9895 1.1 christos {
9896 1.1 christos case R_PPC_RELATIVE:
9897 1.1 christos return reloc_class_relative;
9898 1.1 christos case R_PPC_JMP_SLOT:
9899 1.1 christos return reloc_class_plt;
9900 1.1 christos case R_PPC_COPY:
9901 1.1 christos return reloc_class_copy;
9902 1.1 christos default:
9903 1.1 christos return reloc_class_normal;
9904 1.1 christos }
9905 1.1 christos }
9906 1.7 christos
9907 1.1 christos /* Finish up the dynamic sections. */
9909 1.1 christos
9910 1.1 christos static bfd_boolean
9911 1.1 christos ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9912 1.1 christos struct bfd_link_info *info)
9913 1.1 christos {
9914 1.1 christos asection *sdyn;
9915 1.1 christos struct ppc_elf_link_hash_table *htab;
9916 1.1 christos bfd_vma got;
9917 1.7 christos bfd *dynobj;
9918 1.1 christos bfd_boolean ret = TRUE;
9919 1.1 christos
9920 1.1 christos #ifdef DEBUG
9921 1.1 christos fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9922 1.1 christos #endif
9923 1.1 christos
9924 1.1 christos htab = ppc_elf_hash_table (info);
9925 1.1 christos dynobj = htab->elf.dynobj;
9926 1.1 christos sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9927 1.1 christos
9928 1.1 christos got = 0;
9929 1.1 christos if (htab->elf.hgot != NULL)
9930 1.1 christos got = SYM_VAL (htab->elf.hgot);
9931 1.1 christos
9932 1.7 christos if (htab->elf.dynamic_sections_created)
9933 1.1 christos {
9934 1.7 christos Elf32_External_Dyn *dyncon, *dynconend;
9935 1.1 christos
9936 1.1 christos BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
9937 1.1 christos
9938 1.1 christos dyncon = (Elf32_External_Dyn *) sdyn->contents;
9939 1.7 christos dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9940 1.1 christos for (; dyncon < dynconend; dyncon++)
9941 1.1 christos {
9942 1.1 christos Elf_Internal_Dyn dyn;
9943 1.7 christos asection *s;
9944 1.1 christos
9945 1.1 christos bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9946 1.1 christos
9947 1.1 christos switch (dyn.d_tag)
9948 1.1 christos {
9949 1.1 christos case DT_PLTGOT:
9950 1.1 christos if (htab->is_vxworks)
9951 1.7 christos s = htab->elf.sgotplt;
9952 1.7 christos else
9953 1.7 christos s = htab->elf.splt;
9954 1.7 christos dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9955 1.7 christos break;
9956 1.7 christos
9957 1.7 christos case DT_PLTRELSZ:
9958 1.7 christos dyn.d_un.d_val = htab->elf.srelplt->size;
9959 1.7 christos break;
9960 1.1 christos
9961 1.1 christos case DT_JMPREL:
9962 1.1 christos s = htab->elf.srelplt;
9963 1.1 christos dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9964 1.1 christos break;
9965 1.1 christos
9966 1.1 christos case DT_PPC_GOT:
9967 1.1 christos dyn.d_un.d_ptr = got;
9968 1.1 christos break;
9969 1.1 christos
9970 1.1 christos case DT_TEXTREL:
9971 1.1 christos if (htab->local_ifunc_resolver)
9972 1.1 christos info->callbacks->einfo
9973 1.7 christos (_("%X%P: text relocations and GNU indirect "
9974 1.7 christos "functions will result in a segfault at runtime\n"));
9975 1.1 christos else if (htab->maybe_local_ifunc_resolver)
9976 1.7 christos info->callbacks->einfo
9977 1.7 christos (_("%P: warning: text relocations and GNU indirect "
9978 1.1 christos "functions may result in a segfault at runtime\n"));
9979 1.1 christos continue;
9980 1.1 christos
9981 1.1 christos default:
9982 1.1 christos if (htab->is_vxworks
9983 1.1 christos && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9984 1.1 christos break;
9985 1.1 christos continue;
9986 1.1 christos }
9987 1.1 christos
9988 1.1 christos bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9989 1.1 christos }
9990 1.1 christos }
9991 1.1 christos
9992 1.1 christos if (htab->elf.sgot != NULL
9993 1.1 christos && htab->elf.sgot->output_section != bfd_abs_section_ptr)
9994 1.1 christos {
9995 1.1 christos if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
9996 1.1 christos || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
9997 1.1 christos {
9998 1.1 christos unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9999 1.1 christos
10000 1.1 christos p += htab->elf.hgot->root.u.def.value;
10001 1.1 christos if (htab->plt_type == PLT_OLD)
10002 1.7 christos {
10003 1.7 christos /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10004 1.7 christos so that a function can easily find the address of
10005 1.7 christos _GLOBAL_OFFSET_TABLE_. */
10006 1.7 christos BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10007 1.1 christos < htab->elf.hgot->root.u.def.section->size);
10008 1.1 christos bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10009 1.1 christos }
10010 1.1 christos
10011 1.7 christos if (sdyn != NULL)
10012 1.1 christos {
10013 1.1 christos bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10014 1.1 christos BFD_ASSERT (htab->elf.hgot->root.u.def.value
10015 1.7 christos < htab->elf.hgot->root.u.def.section->size);
10016 1.7 christos bfd_put_32 (output_bfd, val, p);
10017 1.7 christos }
10018 1.7 christos }
10019 1.1 christos else
10020 1.7 christos {
10021 1.1 christos /* xgettext:c-format */
10022 1.3 christos _bfd_error_handler (_("%s not defined in linker created %pA"),
10023 1.1 christos htab->elf.hgot->root.root.string,
10024 1.1 christos (htab->elf.sgotplt != NULL
10025 1.1 christos ? htab->elf.sgotplt : htab->elf.sgot));
10026 1.3 christos bfd_set_error (bfd_error_bad_value);
10027 1.1 christos ret = FALSE;
10028 1.1 christos }
10029 1.1 christos
10030 1.1 christos elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10031 1.1 christos }
10032 1.1 christos
10033 1.1 christos /* Fill in the first entry in the VxWorks procedure linkage table. */
10034 1.1 christos if (htab->is_vxworks
10035 1.1 christos && htab->elf.splt != NULL
10036 1.1 christos && htab->elf.splt->size != 0
10037 1.1 christos && htab->elf.splt->output_section != bfd_abs_section_ptr)
10038 1.1 christos {
10039 1.1 christos asection *splt = htab->elf.splt;
10040 1.1 christos /* Use the right PLT. */
10041 1.1 christos const bfd_vma *plt_entry = (bfd_link_pic (info)
10042 1.1 christos ? ppc_elf_vxworks_pic_plt0_entry
10043 1.1 christos : ppc_elf_vxworks_plt0_entry);
10044 1.1 christos
10045 1.1 christos if (!bfd_link_pic (info))
10046 1.1 christos {
10047 1.3 christos bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10048 1.1 christos
10049 1.1 christos bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10050 1.1 christos splt->contents + 0);
10051 1.1 christos bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10052 1.1 christos splt->contents + 4);
10053 1.1 christos }
10054 1.1 christos else
10055 1.7 christos {
10056 1.7 christos bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10057 1.1 christos bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10058 1.1 christos }
10059 1.1 christos bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10060 1.1 christos bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10061 1.1 christos bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10062 1.1 christos bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10063 1.1 christos bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10064 1.7 christos bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10065 1.7 christos
10066 1.1 christos if (! bfd_link_pic (info))
10067 1.1 christos {
10068 1.1 christos Elf_Internal_Rela rela;
10069 1.1 christos bfd_byte *loc;
10070 1.1 christos
10071 1.1 christos loc = htab->srelplt2->contents;
10072 1.1 christos
10073 1.1 christos /* Output the @ha relocation for the first instruction. */
10074 1.1 christos rela.r_offset = (htab->elf.splt->output_section->vma
10075 1.1 christos + htab->elf.splt->output_offset
10076 1.1 christos + 2);
10077 1.1 christos rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10078 1.1 christos rela.r_addend = 0;
10079 1.1 christos bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10080 1.1 christos loc += sizeof (Elf32_External_Rela);
10081 1.1 christos
10082 1.1 christos /* Output the @l relocation for the second instruction. */
10083 1.1 christos rela.r_offset = (htab->elf.splt->output_section->vma
10084 1.1 christos + htab->elf.splt->output_offset
10085 1.1 christos + 6);
10086 1.1 christos rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10087 1.1 christos rela.r_addend = 0;
10088 1.1 christos bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10089 1.1 christos loc += sizeof (Elf32_External_Rela);
10090 1.1 christos
10091 1.1 christos /* Fix up the remaining relocations. They may have the wrong
10092 1.1 christos symbol index for _G_O_T_ or _P_L_T_ depending on the order
10093 1.1 christos in which symbols were output. */
10094 1.1 christos while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10095 1.1 christos {
10096 1.1 christos Elf_Internal_Rela rel;
10097 1.1 christos
10098 1.1 christos bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10099 1.1 christos rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10100 1.1 christos bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10101 1.1 christos loc += sizeof (Elf32_External_Rela);
10102 1.1 christos
10103 1.1 christos bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10104 1.1 christos rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10105 1.1 christos bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10106 1.1 christos loc += sizeof (Elf32_External_Rela);
10107 1.1 christos
10108 1.1 christos bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10109 1.1 christos rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10110 1.1 christos bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10111 1.1 christos loc += sizeof (Elf32_External_Rela);
10112 1.1 christos }
10113 1.1 christos }
10114 1.1 christos }
10115 1.1 christos
10116 1.1 christos if (htab->glink != NULL
10117 1.1 christos && htab->glink->contents != NULL
10118 1.1 christos && htab->elf.dynamic_sections_created)
10119 1.1 christos {
10120 1.1 christos unsigned char *p;
10121 1.1 christos unsigned char *endp;
10122 1.1 christos bfd_vma res0;
10123 1.1 christos
10124 1.1 christos /*
10125 1.1 christos * PIC glink code is the following:
10126 1.1 christos *
10127 1.1 christos * # ith PLT code stub.
10128 1.1 christos * addis 11,30,(plt+(i-1)*4-got)@ha
10129 1.1 christos * lwz 11,(plt+(i-1)*4-got)@l(11)
10130 1.1 christos * mtctr 11
10131 1.1 christos * bctr
10132 1.7 christos *
10133 1.1 christos * # A table of branches, one for each plt entry.
10134 1.7 christos * # The idea is that the plt call stub loads ctr and r11 with these
10135 1.7 christos * # addresses, so (r11 - res_0) gives the plt index * 4.
10136 1.1 christos * res_0: b PLTresolve
10137 1.1 christos * res_1: b PLTresolve
10138 1.7 christos * .
10139 1.1 christos * # Some number of entries towards the end can be nops
10140 1.7 christos * res_n_m3: nop
10141 1.1 christos * res_n_m2: nop
10142 1.1 christos * res_n_m1:
10143 1.1 christos *
10144 1.1 christos * PLTresolve:
10145 1.1 christos * addis 11,11,(1f-res_0)@ha
10146 1.1 christos * mflr 0
10147 1.1 christos * bcl 20,31,1f
10148 1.1 christos * 1: addi 11,11,(1b-res_0)@l
10149 1.1 christos * mflr 12
10150 1.1 christos * mtlr 0
10151 1.1 christos * sub 11,11,12 # r11 = index * 4
10152 1.1 christos * addis 12,12,(got+4-1b)@ha
10153 1.1 christos * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10154 1.7 christos * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10155 1.7 christos * mtctr 0
10156 1.1 christos * add 0,11,11
10157 1.1 christos * add 11,0,11 # r11 = index * 12 = reloc offset.
10158 1.7 christos * bctr
10159 1.7 christos *
10160 1.1 christos * Non-PIC glink code is a little simpler.
10161 1.1 christos *
10162 1.1 christos * # ith PLT code stub.
10163 1.1 christos * lis 11,(plt+(i-1)*4)@ha
10164 1.1 christos * lwz 11,(plt+(i-1)*4)@l(11)
10165 1.1 christos * mtctr 11
10166 1.1 christos * bctr
10167 1.1 christos *
10168 1.1 christos * The branch table is the same, then comes
10169 1.3 christos *
10170 1.1 christos * PLTresolve:
10171 1.1 christos * lis 12,(got+4)@ha
10172 1.1 christos * addis 11,11,(-res_0)@ha
10173 1.1 christos * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10174 1.1 christos * addi 11,11,(-res_0)@l # r11 = index * 4
10175 1.1 christos * mtctr 0
10176 1.1 christos * add 0,11,11
10177 1.1 christos * lwz 12,(got+8)@l(12) # got[2] contains the map address
10178 1.1 christos * add 11,0,11 # r11 = index * 12 = reloc offset.
10179 1.1 christos * bctr
10180 1.1 christos */
10181 1.1 christos
10182 1.1 christos /* Build the branch table, one for each plt entry (less one),
10183 1.1 christos and perhaps some padding. */
10184 1.3 christos p = htab->glink->contents;
10185 1.3 christos p += htab->glink_pltresolve;
10186 1.3 christos endp = htab->glink->contents;
10187 1.3 christos endp += htab->glink->size - GLINK_PLTRESOLVE;
10188 1.3 christos while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10189 1.3 christos {
10190 1.3 christos bfd_put_32 (output_bfd, B + endp - p, p);
10191 1.3 christos p += 4;
10192 1.3 christos }
10193 1.3 christos while (p < endp)
10194 1.3 christos {
10195 1.3 christos bfd_put_32 (output_bfd, NOP, p);
10196 1.3 christos p += 4;
10197 1.3 christos }
10198 1.3 christos
10199 1.3 christos res0 = (htab->glink_pltresolve
10200 1.3 christos + htab->glink->output_section->vma
10201 1.3 christos + htab->glink->output_offset);
10202 1.3 christos
10203 1.3 christos if (htab->params->ppc476_workaround)
10204 1.3 christos {
10205 1.3 christos /* Ensure that a call stub at the end of a page doesn't
10206 1.3 christos result in prefetch over the end of the page into the
10207 1.3 christos glink branch table. */
10208 1.3 christos bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10209 1.3 christos bfd_vma page_addr;
10210 1.3 christos bfd_vma glink_start = (htab->glink->output_section->vma
10211 1.3 christos + htab->glink->output_offset);
10212 1.3 christos
10213 1.3 christos for (page_addr = res0 & -pagesize;
10214 1.3 christos page_addr > glink_start;
10215 1.3 christos page_addr -= pagesize)
10216 1.3 christos {
10217 1.1 christos /* We have a plt call stub that may need fixing. */
10218 1.7 christos bfd_byte *loc;
10219 1.3 christos unsigned int insn;
10220 1.1 christos
10221 1.1 christos loc = htab->glink->contents + page_addr - 4 - glink_start;
10222 1.1 christos insn = bfd_get_32 (output_bfd, loc);
10223 1.1 christos if (insn == BCTR)
10224 1.1 christos {
10225 1.1 christos /* By alignment, we know that there must be at least
10226 1.1 christos one other call stub before this one. */
10227 1.7 christos insn = bfd_get_32 (output_bfd, loc - 16);
10228 1.7 christos if (insn == BCTR)
10229 1.7 christos bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10230 1.7 christos else
10231 1.7 christos bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10232 1.7 christos }
10233 1.7 christos }
10234 1.7 christos }
10235 1.7 christos
10236 1.7 christos /* Last comes the PLTresolve stub. */
10237 1.7 christos endp = p + GLINK_PLTRESOLVE;
10238 1.7 christos if (bfd_link_pic (info))
10239 1.7 christos {
10240 1.7 christos bfd_vma bcl;
10241 1.7 christos
10242 1.7 christos bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10243 1.1 christos + htab->glink->output_section->vma
10244 1.1 christos + htab->glink->output_offset);
10245 1.7 christos
10246 1.7 christos bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
10247 1.7 christos p += 4;
10248 1.7 christos bfd_put_32 (output_bfd, MFLR_0, p);
10249 1.1 christos p += 4;
10250 1.1 christos bfd_put_32 (output_bfd, BCL_20_31, p);
10251 1.1 christos p += 4;
10252 1.7 christos bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
10253 1.7 christos p += 4;
10254 1.7 christos bfd_put_32 (output_bfd, MFLR_12, p);
10255 1.7 christos p += 4;
10256 1.1 christos bfd_put_32 (output_bfd, MTLR_0, p);
10257 1.7 christos p += 4;
10258 1.7 christos bfd_put_32 (output_bfd, SUB_11_11_12, p);
10259 1.7 christos p += 4;
10260 1.1 christos bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
10261 1.1 christos p += 4;
10262 1.1 christos if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10263 1.7 christos {
10264 1.7 christos bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
10265 1.7 christos p += 4;
10266 1.7 christos bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
10267 1.7 christos p += 4;
10268 1.7 christos }
10269 1.7 christos else
10270 1.7 christos {
10271 1.7 christos bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
10272 1.7 christos p += 4;
10273 1.7 christos bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
10274 1.7 christos p += 4;
10275 1.7 christos }
10276 1.7 christos bfd_put_32 (output_bfd, MTCTR_0, p);
10277 1.7 christos p += 4;
10278 1.1 christos bfd_put_32 (output_bfd, ADD_0_11_11, p);
10279 1.7 christos }
10280 1.1 christos else
10281 1.7 christos {
10282 1.7 christos bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
10283 1.7 christos p += 4;
10284 1.7 christos bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
10285 1.7 christos p += 4;
10286 1.7 christos if (PPC_HA (got + 4) == PPC_HA (got + 8))
10287 1.7 christos bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
10288 1.7 christos else
10289 1.7 christos bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
10290 1.7 christos p += 4;
10291 1.7 christos bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
10292 1.7 christos p += 4;
10293 1.1 christos bfd_put_32 (output_bfd, MTCTR_0, p);
10294 1.7 christos p += 4;
10295 1.1 christos bfd_put_32 (output_bfd, ADD_0_11_11, p);
10296 1.1 christos p += 4;
10297 1.1 christos if (PPC_HA (got + 4) == PPC_HA (got + 8))
10298 1.1 christos bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
10299 1.1 christos else
10300 1.1 christos bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
10301 1.1 christos }
10302 1.1 christos p += 4;
10303 1.1 christos bfd_put_32 (output_bfd, ADD_11_0_11, p);
10304 1.1 christos p += 4;
10305 1.1 christos bfd_put_32 (output_bfd, BCTR, p);
10306 1.1 christos p += 4;
10307 1.1 christos while (p < endp)
10308 1.1 christos {
10309 1.1 christos bfd_put_32 (output_bfd,
10310 1.1 christos htab->params->ppc476_workaround ? BA : NOP, p);
10311 1.1 christos p += 4;
10312 1.1 christos }
10313 1.1 christos BFD_ASSERT (p == endp);
10314 1.1 christos }
10315 1.1 christos
10316 1.1 christos if (htab->glink_eh_frame != NULL
10317 1.1 christos && htab->glink_eh_frame->contents != NULL)
10318 1.1 christos {
10319 1.1 christos unsigned char *p = htab->glink_eh_frame->contents;
10320 1.1 christos bfd_vma val;
10321 1.1 christos
10322 1.1 christos p += sizeof (glink_eh_frame_cie);
10323 1.1 christos /* FDE length. */
10324 1.1 christos p += 4;
10325 1.1 christos /* CIE pointer. */
10326 1.3 christos p += 4;
10327 1.1 christos /* Offset to .glink. */
10328 1.3 christos val = (htab->glink->output_section->vma
10329 1.1 christos + htab->glink->output_offset);
10330 1.1 christos val -= (htab->glink_eh_frame->output_section->vma
10331 1.1 christos + htab->glink_eh_frame->output_offset);
10332 1.1 christos val -= p - htab->glink_eh_frame->contents;
10333 1.7 christos bfd_put_32 (htab->elf.dynobj, val, p);
10334 1.3 christos
10335 1.7 christos if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10336 1.1 christos && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10337 1.1 christos htab->glink_eh_frame,
10338 1.1 christos htab->glink_eh_frame->contents))
10339 1.1 christos return FALSE;
10340 1.1 christos }
10341 1.1 christos
10342 1.1 christos return ret;
10343 1.1 christos }
10344 1.1 christos
10345 1.1 christos #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10347 1.7 christos #define TARGET_LITTLE_NAME "elf32-powerpcle"
10348 1.1 christos #define TARGET_BIG_SYM powerpc_elf32_vec
10349 1.1 christos #define TARGET_BIG_NAME "elf32-powerpc"
10350 1.1 christos #define ELF_ARCH bfd_arch_powerpc
10351 1.3 christos #define ELF_TARGET_ID PPC32_ELF_DATA
10352 1.1 christos #define ELF_MACHINE_CODE EM_PPC
10353 1.1 christos #define ELF_MAXPAGESIZE 0x10000
10354 1.1 christos #define ELF_COMMONPAGESIZE 0x1000
10355 1.1 christos #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
10356 1.1 christos #define elf_info_to_howto ppc_elf_info_to_howto
10357 1.1 christos
10358 1.1 christos #ifdef EM_CYGNUS_POWERPC
10359 1.1 christos #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10360 1.1 christos #endif
10361 1.1 christos
10362 1.1 christos #ifdef EM_PPC_OLD
10363 1.1 christos #define ELF_MACHINE_ALT2 EM_PPC_OLD
10364 1.1 christos #endif
10365 1.1 christos
10366 1.1 christos #define elf_backend_plt_not_loaded 1
10367 1.1 christos #define elf_backend_want_dynrelro 1
10368 1.7 christos #define elf_backend_can_gc_sections 1
10369 1.1 christos #define elf_backend_can_refcount 1
10370 1.1 christos #define elf_backend_rela_normal 1
10371 1.1 christos #define elf_backend_caches_rawsize 1
10372 1.1 christos
10373 1.1 christos #define bfd_elf32_mkobject ppc_elf_mkobject
10374 1.1 christos #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10375 1.1 christos #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10376 1.1 christos #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10377 1.1 christos #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10378 1.7 christos #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10379 1.1 christos #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10380 1.1 christos #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10381 1.1 christos
10382 1.1 christos #define elf_backend_object_p ppc_elf_object_p
10383 1.1 christos #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10384 1.1 christos #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10385 1.1 christos #define elf_backend_relocate_section ppc_elf_relocate_section
10386 1.1 christos #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10387 1.1 christos #define elf_backend_check_relocs ppc_elf_check_relocs
10388 1.1 christos #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
10389 1.1 christos #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10390 1.1 christos #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10391 1.1 christos #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10392 1.1 christos #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10393 1.1 christos #define elf_backend_hash_symbol ppc_elf_hash_symbol
10394 1.1 christos #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10395 1.1 christos #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10396 1.1 christos #define elf_backend_fake_sections ppc_elf_fake_sections
10397 1.1 christos #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10398 1.1 christos #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10399 1.1 christos #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10400 1.3 christos #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10401 1.1 christos #define elf_backend_write_core_note ppc_elf_write_core_note
10402 1.1 christos #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10403 1.1 christos #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10404 1.1 christos #define elf_backend_final_write_processing ppc_elf_final_write_processing
10405 1.1 christos #define elf_backend_write_section ppc_elf_write_section
10406 1.1 christos #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10407 1.1 christos #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10408 1.1 christos #define elf_backend_action_discarded ppc_elf_action_discarded
10409 1.1 christos #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10410 1.1 christos #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10411 1.1 christos
10412 1.1 christos #include "elf32-target.h"
10413 1.1 christos
10414 1.1 christos /* FreeBSD Target */
10415 1.1 christos
10416 1.1 christos #undef TARGET_LITTLE_SYM
10417 1.1 christos #undef TARGET_LITTLE_NAME
10418 1.3 christos
10419 1.1 christos #undef TARGET_BIG_SYM
10420 1.1 christos #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10421 1.1 christos #undef TARGET_BIG_NAME
10422 1.1 christos #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10423 1.1 christos
10424 1.1 christos #undef ELF_OSABI
10425 1.1 christos #define ELF_OSABI ELFOSABI_FREEBSD
10426 1.7 christos
10427 1.1 christos #undef elf32_bed
10428 1.1 christos #define elf32_bed elf32_powerpc_fbsd_bed
10429 1.1 christos
10430 1.1 christos #include "elf32-target.h"
10431 1.1 christos
10432 1.1 christos /* VxWorks Target */
10433 1.1 christos
10434 1.1 christos #undef TARGET_LITTLE_SYM
10435 1.1 christos #undef TARGET_LITTLE_NAME
10436 1.1 christos
10437 1.1 christos #undef TARGET_BIG_SYM
10438 1.1 christos #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10439 1.1 christos #undef TARGET_BIG_NAME
10440 1.1 christos #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10441 1.1 christos
10442 1.1 christos #undef ELF_OSABI
10443 1.1 christos
10444 1.1 christos /* VxWorks uses the elf default section flags for .plt. */
10445 1.1 christos static const struct bfd_elf_special_section *
10446 1.1 christos ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10447 1.1 christos {
10448 1.7 christos if (sec->name == NULL)
10449 1.1 christos return NULL;
10450 1.1 christos
10451 1.1 christos if (strcmp (sec->name, ".plt") == 0)
10452 1.1 christos return _bfd_elf_get_sec_type_attr (abfd, sec);
10453 1.1 christos
10454 1.1 christos return ppc_elf_get_sec_type_attr (abfd, sec);
10455 1.1 christos }
10456 1.1 christos
10457 1.1 christos /* Like ppc_elf_link_hash_table_create, but overrides
10458 1.1 christos appropriately for VxWorks. */
10459 1.1 christos static struct bfd_link_hash_table *
10460 1.1 christos ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10461 1.1 christos {
10462 1.1 christos struct bfd_link_hash_table *ret;
10463 1.7 christos
10464 1.7 christos ret = ppc_elf_link_hash_table_create (abfd);
10465 1.1 christos if (ret)
10466 1.1 christos {
10467 1.1 christos struct ppc_elf_link_hash_table *htab
10468 1.7 christos = (struct ppc_elf_link_hash_table *)ret;
10469 1.7 christos htab->is_vxworks = 1;
10470 1.1 christos htab->plt_type = PLT_VXWORKS;
10471 1.1 christos htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10472 1.7 christos htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10473 1.1 christos htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10474 1.1 christos }
10475 1.9 christos return ret;
10476 1.9 christos }
10477 1.1 christos
10478 1.9 christos /* Tweak magic VxWorks symbols as they are loaded. */
10479 1.9 christos static bfd_boolean
10480 1.1 christos ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10481 1.1 christos struct bfd_link_info *info,
10482 1.1 christos Elf_Internal_Sym *sym,
10483 1.1 christos const char **namep,
10484 1.1 christos flagword *flagsp,
10485 1.1 christos asection **secp,
10486 1.1 christos bfd_vma *valp)
10487 1.1 christos {
10488 1.1 christos if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
10489 1.1 christos valp))
10490 1.1 christos return FALSE;
10491 1.1 christos
10492 1.1 christos return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
10493 1.1 christos }
10494 1.1 christos
10495 1.1 christos static bfd_boolean
10496 1.7 christos ppc_elf_vxworks_final_write_processing (bfd *abfd)
10497 1.7 christos {
10498 1.1 christos ppc_final_write_processing (abfd);
10499 1.1 christos return elf_vxworks_final_write_processing (abfd);
10500 1.1 christos }
10501 1.1 christos
10502 1.1 christos /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10503 1.1 christos define it. */
10504 1.1 christos #undef elf_backend_want_plt_sym
10505 1.1 christos #define elf_backend_want_plt_sym 1
10506 1.1 christos #undef elf_backend_want_got_plt
10507 1.1 christos #define elf_backend_want_got_plt 1
10508 1.1 christos #undef elf_backend_got_symbol_offset
10509 1.1 christos #define elf_backend_got_symbol_offset 0
10510 1.1 christos #undef elf_backend_plt_not_loaded
10511 1.1 christos #define elf_backend_plt_not_loaded 0
10512 1.1 christos #undef elf_backend_plt_readonly
10513 1.1 christos #define elf_backend_plt_readonly 1
10514 1.1 christos #undef elf_backend_got_header_size
10515 1.1 christos #define elf_backend_got_header_size 12
10516 1.1 christos #undef elf_backend_dtrel_excludes_plt
10517 1.1 christos #define elf_backend_dtrel_excludes_plt 1
10518 1.1 christos
10519 1.1 christos #undef bfd_elf32_get_synthetic_symtab
10520 1.1 christos
10521 1.1 christos #undef bfd_elf32_bfd_link_hash_table_create
10522 1.1 christos #define bfd_elf32_bfd_link_hash_table_create \
10523 1.1 christos ppc_elf_vxworks_link_hash_table_create
10524 #undef elf_backend_add_symbol_hook
10525 #define elf_backend_add_symbol_hook \
10526 ppc_elf_vxworks_add_symbol_hook
10527 #undef elf_backend_link_output_symbol_hook
10528 #define elf_backend_link_output_symbol_hook \
10529 elf_vxworks_link_output_symbol_hook
10530 #undef elf_backend_final_write_processing
10531 #define elf_backend_final_write_processing \
10532 ppc_elf_vxworks_final_write_processing
10533 #undef elf_backend_get_sec_type_attr
10534 #define elf_backend_get_sec_type_attr \
10535 ppc_elf_vxworks_get_sec_type_attr
10536 #undef elf_backend_emit_relocs
10537 #define elf_backend_emit_relocs \
10538 elf_vxworks_emit_relocs
10539
10540 #undef elf32_bed
10541 #define elf32_bed ppc_elf_vxworks_bed
10542
10543 #include "elf32-target.h"
10544