elf32-ppc.c revision 1.9 1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2020 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
41 #define OCTETS_PER_BYTE(ABFD, SEC) 1
42
43 typedef enum split16_format_type
44 {
45 split16a_type = 0,
46 split16d_type
47 }
48 split16_format_type;
49
50 /* RELA relocations are used here. */
51
52 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56
57 /* Branch prediction bit for branch taken relocs. */
58 #define BRANCH_PREDICT_BIT 0x200000
59 /* Mask to set RA in memory instructions. */
60 #define RA_REGISTER_MASK 0x001f0000
61 /* Value to shift register by to insert RA. */
62 #define RA_REGISTER_SHIFT 16
63
64 /* The name of the dynamic interpreter. This is put in the .interp
65 section. */
66 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
67
68 /* For old-style PLT. */
69 /* The number of single-slot PLT entries (the rest use two slots). */
70 #define PLT_NUM_SINGLE_ENTRIES 8192
71
72 /* For new-style .glink and .plt. */
73 #define GLINK_PLTRESOLVE 16*4
74 #define GLINK_ENTRY_SIZE(htab, h) \
75 ((4*4 \
76 + (h != NULL \
77 && h == htab->tls_get_addr \
78 && !htab->params->no_tls_get_addr_opt ? 8*4 : 0) \
79 + (1u << htab->params->plt_stub_align) - 1) \
80 & -(1u << htab->params->plt_stub_align))
81
82 /* VxWorks uses its own plt layout, filled in by the static linker. */
83
84 /* The standard VxWorks PLT entry. */
85 #define VXWORKS_PLT_ENTRY_SIZE 32
86 static const bfd_vma ppc_elf_vxworks_plt_entry
87 [VXWORKS_PLT_ENTRY_SIZE / 4] =
88 {
89 0x3d800000, /* lis r12,0 */
90 0x818c0000, /* lwz r12,0(r12) */
91 0x7d8903a6, /* mtctr r12 */
92 0x4e800420, /* bctr */
93 0x39600000, /* li r11,0 */
94 0x48000000, /* b 14 <.PLT0resolve+0x4> */
95 0x60000000, /* nop */
96 0x60000000, /* nop */
97 };
98 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
99 [VXWORKS_PLT_ENTRY_SIZE / 4] =
100 {
101 0x3d9e0000, /* addis r12,r30,0 */
102 0x818c0000, /* lwz r12,0(r12) */
103 0x7d8903a6, /* mtctr r12 */
104 0x4e800420, /* bctr */
105 0x39600000, /* li r11,0 */
106 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
107 0x60000000, /* nop */
108 0x60000000, /* nop */
109 };
110
111 /* The initial VxWorks PLT entry. */
112 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
113 static const bfd_vma ppc_elf_vxworks_plt0_entry
114 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
115 {
116 0x3d800000, /* lis r12,0 */
117 0x398c0000, /* addi r12,r12,0 */
118 0x800c0008, /* lwz r0,8(r12) */
119 0x7c0903a6, /* mtctr r0 */
120 0x818c0004, /* lwz r12,4(r12) */
121 0x4e800420, /* bctr */
122 0x60000000, /* nop */
123 0x60000000, /* nop */
124 };
125 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
126 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
127 {
128 0x819e0008, /* lwz r12,8(r30) */
129 0x7d8903a6, /* mtctr r12 */
130 0x819e0004, /* lwz r12,4(r30) */
131 0x4e800420, /* bctr */
132 0x60000000, /* nop */
133 0x60000000, /* nop */
134 0x60000000, /* nop */
135 0x60000000, /* nop */
136 };
137
138 /* For executables, we have some additional relocations in
139 .rela.plt.unloaded, for the kernel loader. */
140
141 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
142 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
143 /* The number of relocations in the PLTResolve slot. */
144 #define VXWORKS_PLTRESOLVE_RELOCS 2
145 /* The number of relocations in the PLTResolve slot when creating
146 a shared library. */
147 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
148
149 /* Some instructions. */
150 #define ADDIS_11_11 0x3d6b0000
151 #define ADDIS_11_30 0x3d7e0000
152 #define ADDIS_12_12 0x3d8c0000
153 #define ADDI_11_11 0x396b0000
154 #define ADD_0_11_11 0x7c0b5a14
155 #define ADD_3_12_2 0x7c6c1214
156 #define ADD_11_0_11 0x7d605a14
157 #define B 0x48000000
158 #define BA 0x48000002
159 #define BCL_20_31 0x429f0005
160 #define BCTR 0x4e800420
161 #define BEQLR 0x4d820020
162 #define CMPWI_11_0 0x2c0b0000
163 #define LIS_11 0x3d600000
164 #define LIS_12 0x3d800000
165 #define LWZU_0_12 0x840c0000
166 #define LWZ_0_12 0x800c0000
167 #define LWZ_11_3 0x81630000
168 #define LWZ_11_11 0x816b0000
169 #define LWZ_11_30 0x817e0000
170 #define LWZ_12_3 0x81830000
171 #define LWZ_12_12 0x818c0000
172 #define MR_0_3 0x7c601b78
173 #define MR_3_0 0x7c030378
174 #define MFLR_0 0x7c0802a6
175 #define MFLR_12 0x7d8802a6
176 #define MTCTR_0 0x7c0903a6
177 #define MTCTR_11 0x7d6903a6
178 #define MTLR_0 0x7c0803a6
179 #define NOP 0x60000000
180 #define SUB_11_11_12 0x7d6c5850
181
182 /* Offset of tp and dtp pointers from start of TLS block. */
183 #define TP_OFFSET 0x7000
184 #define DTP_OFFSET 0x8000
185
186 /* The value of a defined global symbol. */
187 #define SYM_VAL(SYM) \
188 ((SYM)->root.u.def.section->output_section->vma \
189 + (SYM)->root.u.def.section->output_offset \
190 + (SYM)->root.u.def.value)
191
192 /* Relocation HOWTO's. */
194 /* Like other ELF RELA targets that don't apply multiple
195 field-altering relocations to the same localation, src_mask is
196 always zero and pcrel_offset is the same as pc_relative.
197 PowerPC can always use a zero bitpos, even when the field is not at
198 the LSB. For example, a REL24 could use rightshift=2, bisize=24
199 and bitpos=2 which matches the ABI description, or as we do here,
200 rightshift=0, bitsize=26 and bitpos=0. */
201 #define HOW(type, size, bitsize, mask, rightshift, pc_relative, \
202 complain, special_func) \
203 HOWTO (type, rightshift, size, bitsize, pc_relative, 0, \
204 complain_overflow_ ## complain, special_func, \
205 #type, FALSE, 0, mask, pc_relative)
206
207 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
208
209 static reloc_howto_type ppc_elf_howto_raw[] = {
210 /* This reloc does nothing. */
211 HOW (R_PPC_NONE, 3, 0, 0, 0, FALSE, dont,
212 bfd_elf_generic_reloc),
213
214 /* A standard 32 bit relocation. */
215 HOW (R_PPC_ADDR32, 2, 32, 0xffffffff, 0, FALSE, dont,
216 bfd_elf_generic_reloc),
217
218 /* An absolute 26 bit branch; the lower two bits must be zero.
219 FIXME: we don't check that, we just clear them. */
220 HOW (R_PPC_ADDR24, 2, 26, 0x3fffffc, 0, FALSE, signed,
221 bfd_elf_generic_reloc),
222
223 /* A standard 16 bit relocation. */
224 HOW (R_PPC_ADDR16, 1, 16, 0xffff, 0, FALSE, bitfield,
225 bfd_elf_generic_reloc),
226
227 /* A 16 bit relocation without overflow. */
228 HOW (R_PPC_ADDR16_LO, 1, 16, 0xffff, 0, FALSE, dont,
229 bfd_elf_generic_reloc),
230
231 /* The high order 16 bits of an address. */
232 HOW (R_PPC_ADDR16_HI, 1, 16, 0xffff, 16, FALSE, dont,
233 bfd_elf_generic_reloc),
234
235 /* The high order 16 bits of an address, plus 1 if the contents of
236 the low 16 bits, treated as a signed number, is negative. */
237 HOW (R_PPC_ADDR16_HA, 1, 16, 0xffff, 16, FALSE, dont,
238 ppc_elf_addr16_ha_reloc),
239
240 /* An absolute 16 bit branch; the lower two bits must be zero.
241 FIXME: we don't check that, we just clear them. */
242 HOW (R_PPC_ADDR14, 2, 16, 0xfffc, 0, FALSE, signed,
243 bfd_elf_generic_reloc),
244
245 /* An absolute 16 bit branch, for which bit 10 should be set to
246 indicate that the branch is expected to be taken. The lower two
247 bits must be zero. */
248 HOW (R_PPC_ADDR14_BRTAKEN, 2, 16, 0xfffc, 0, FALSE, signed,
249 bfd_elf_generic_reloc),
250
251 /* An absolute 16 bit branch, for which bit 10 should be set to
252 indicate that the branch is not expected to be taken. The lower
253 two bits must be zero. */
254 HOW (R_PPC_ADDR14_BRNTAKEN, 2, 16, 0xfffc, 0, FALSE, signed,
255 bfd_elf_generic_reloc),
256
257 /* A relative 26 bit branch; the lower two bits must be zero. */
258 HOW (R_PPC_REL24, 2, 26, 0x3fffffc, 0, TRUE, signed,
259 bfd_elf_generic_reloc),
260
261 /* A relative 16 bit branch; the lower two bits must be zero. */
262 HOW (R_PPC_REL14, 2, 16, 0xfffc, 0, TRUE, signed,
263 bfd_elf_generic_reloc),
264
265 /* A relative 16 bit branch. Bit 10 should be set to indicate that
266 the branch is expected to be taken. The lower two bits must be
267 zero. */
268 HOW (R_PPC_REL14_BRTAKEN, 2, 16, 0xfffc, 0, TRUE, signed,
269 bfd_elf_generic_reloc),
270
271 /* A relative 16 bit branch. Bit 10 should be set to indicate that
272 the branch is not expected to be taken. The lower two bits must
273 be zero. */
274 HOW (R_PPC_REL14_BRNTAKEN, 2, 16, 0xfffc, 0, TRUE, signed,
275 bfd_elf_generic_reloc),
276
277 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
278 symbol. */
279 HOW (R_PPC_GOT16, 1, 16, 0xffff, 0, FALSE, signed,
280 ppc_elf_unhandled_reloc),
281
282 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
283 the symbol. */
284 HOW (R_PPC_GOT16_LO, 1, 16, 0xffff, 0, FALSE, dont,
285 ppc_elf_unhandled_reloc),
286
287 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
288 the symbol. */
289 HOW (R_PPC_GOT16_HI, 1, 16, 0xffff, 16, FALSE, dont,
290 ppc_elf_unhandled_reloc),
291
292 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
293 the symbol. */
294 HOW (R_PPC_GOT16_HA, 1, 16, 0xffff, 16, FALSE, dont,
295 ppc_elf_unhandled_reloc),
296
297 /* Like R_PPC_REL24, but referring to the procedure linkage table
298 entry for the symbol. */
299 HOW (R_PPC_PLTREL24, 2, 26, 0x3fffffc, 0, TRUE, signed,
300 ppc_elf_unhandled_reloc),
301
302 /* This is used only by the dynamic linker. The symbol should exist
303 both in the object being run and in some shared library. The
304 dynamic linker copies the data addressed by the symbol from the
305 shared library into the object, because the object being
306 run has to have the data at some particular address. */
307 HOW (R_PPC_COPY, 2, 32, 0, 0, FALSE, dont,
308 ppc_elf_unhandled_reloc),
309
310 /* Like R_PPC_ADDR32, but used when setting global offset table
311 entries. */
312 HOW (R_PPC_GLOB_DAT, 2, 32, 0xffffffff, 0, FALSE, dont,
313 ppc_elf_unhandled_reloc),
314
315 /* Marks a procedure linkage table entry for a symbol. */
316 HOW (R_PPC_JMP_SLOT, 2, 32, 0, 0, FALSE, dont,
317 ppc_elf_unhandled_reloc),
318
319 /* Used only by the dynamic linker. When the object is run, this
320 longword is set to the load address of the object, plus the
321 addend. */
322 HOW (R_PPC_RELATIVE, 2, 32, 0xffffffff, 0, FALSE, dont,
323 bfd_elf_generic_reloc),
324
325 /* Like R_PPC_REL24, but uses the value of the symbol within the
326 object rather than the final value. Normally used for
327 _GLOBAL_OFFSET_TABLE_. */
328 HOW (R_PPC_LOCAL24PC, 2, 26, 0x3fffffc, 0, TRUE, signed,
329 bfd_elf_generic_reloc),
330
331 /* Like R_PPC_ADDR32, but may be unaligned. */
332 HOW (R_PPC_UADDR32, 2, 32, 0xffffffff, 0, FALSE, dont,
333 bfd_elf_generic_reloc),
334
335 /* Like R_PPC_ADDR16, but may be unaligned. */
336 HOW (R_PPC_UADDR16, 1, 16, 0xffff, 0, FALSE, bitfield,
337 bfd_elf_generic_reloc),
338
339 /* 32-bit PC relative */
340 HOW (R_PPC_REL32, 2, 32, 0xffffffff, 0, TRUE, dont,
341 bfd_elf_generic_reloc),
342
343 /* 32-bit relocation to the symbol's procedure linkage table.
344 FIXME: not supported. */
345 HOW (R_PPC_PLT32, 2, 32, 0, 0, FALSE, dont,
346 ppc_elf_unhandled_reloc),
347
348 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
349 FIXME: not supported. */
350 HOW (R_PPC_PLTREL32, 2, 32, 0, 0, TRUE, dont,
351 ppc_elf_unhandled_reloc),
352
353 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
354 the symbol. */
355 HOW (R_PPC_PLT16_LO, 1, 16, 0xffff, 0, FALSE, dont,
356 ppc_elf_unhandled_reloc),
357
358 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
359 the symbol. */
360 HOW (R_PPC_PLT16_HI, 1, 16, 0xffff, 16, FALSE, dont,
361 ppc_elf_unhandled_reloc),
362
363 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
364 the symbol. */
365 HOW (R_PPC_PLT16_HA, 1, 16, 0xffff, 16, FALSE, dont,
366 ppc_elf_unhandled_reloc),
367
368 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
369 small data items. */
370 HOW (R_PPC_SDAREL16, 1, 16, 0xffff, 0, FALSE, signed,
371 ppc_elf_unhandled_reloc),
372
373 /* 16-bit section relative relocation. */
374 HOW (R_PPC_SECTOFF, 1, 16, 0xffff, 0, FALSE, signed,
375 ppc_elf_unhandled_reloc),
376
377 /* 16-bit lower half section relative relocation. */
378 HOW (R_PPC_SECTOFF_LO, 1, 16, 0xffff, 0, FALSE, dont,
379 ppc_elf_unhandled_reloc),
380
381 /* 16-bit upper half section relative relocation. */
382 HOW (R_PPC_SECTOFF_HI, 1, 16, 0xffff, 16, FALSE, dont,
383 ppc_elf_unhandled_reloc),
384
385 /* 16-bit upper half adjusted section relative relocation. */
386 HOW (R_PPC_SECTOFF_HA, 1, 16, 0xffff, 16, FALSE, dont,
387 ppc_elf_unhandled_reloc),
388
389 /* Marker relocs for TLS. */
390 HOW (R_PPC_TLS, 2, 32, 0, 0, FALSE, dont,
391 bfd_elf_generic_reloc),
392
393 HOW (R_PPC_TLSGD, 2, 32, 0, 0, FALSE, dont,
394 bfd_elf_generic_reloc),
395
396 HOW (R_PPC_TLSLD, 2, 32, 0, 0, FALSE, dont,
397 bfd_elf_generic_reloc),
398
399 /* Marker relocs on inline plt call instructions. */
400 HOW (R_PPC_PLTSEQ, 2, 32, 0, 0, FALSE, dont,
401 bfd_elf_generic_reloc),
402
403 HOW (R_PPC_PLTCALL, 2, 32, 0, 0, FALSE, dont,
404 bfd_elf_generic_reloc),
405
406 /* Computes the load module index of the load module that contains the
407 definition of its TLS sym. */
408 HOW (R_PPC_DTPMOD32, 2, 32, 0xffffffff, 0, FALSE, dont,
409 ppc_elf_unhandled_reloc),
410
411 /* Computes a dtv-relative displacement, the difference between the value
412 of sym+add and the base address of the thread-local storage block that
413 contains the definition of sym, minus 0x8000. */
414 HOW (R_PPC_DTPREL32, 2, 32, 0xffffffff, 0, FALSE, dont,
415 ppc_elf_unhandled_reloc),
416
417 /* A 16 bit dtprel reloc. */
418 HOW (R_PPC_DTPREL16, 1, 16, 0xffff, 0, FALSE, signed,
419 ppc_elf_unhandled_reloc),
420
421 /* Like DTPREL16, but no overflow. */
422 HOW (R_PPC_DTPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
423 ppc_elf_unhandled_reloc),
424
425 /* Like DTPREL16_LO, but next higher group of 16 bits. */
426 HOW (R_PPC_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, dont,
427 ppc_elf_unhandled_reloc),
428
429 /* Like DTPREL16_HI, but adjust for low 16 bits. */
430 HOW (R_PPC_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, dont,
431 ppc_elf_unhandled_reloc),
432
433 /* Computes a tp-relative displacement, the difference between the value of
434 sym+add and the value of the thread pointer (r13). */
435 HOW (R_PPC_TPREL32, 2, 32, 0xffffffff, 0, FALSE, dont,
436 ppc_elf_unhandled_reloc),
437
438 /* A 16 bit tprel reloc. */
439 HOW (R_PPC_TPREL16, 1, 16, 0xffff, 0, FALSE, signed,
440 ppc_elf_unhandled_reloc),
441
442 /* Like TPREL16, but no overflow. */
443 HOW (R_PPC_TPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
444 ppc_elf_unhandled_reloc),
445
446 /* Like TPREL16_LO, but next higher group of 16 bits. */
447 HOW (R_PPC_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, dont,
448 ppc_elf_unhandled_reloc),
449
450 /* Like TPREL16_HI, but adjust for low 16 bits. */
451 HOW (R_PPC_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, dont,
452 ppc_elf_unhandled_reloc),
453
454 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
455 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
456 to the first entry. */
457 HOW (R_PPC_GOT_TLSGD16, 1, 16, 0xffff, 0, FALSE, signed,
458 ppc_elf_unhandled_reloc),
459
460 /* Like GOT_TLSGD16, but no overflow. */
461 HOW (R_PPC_GOT_TLSGD16_LO, 1, 16, 0xffff, 0, FALSE, dont,
462 ppc_elf_unhandled_reloc),
463
464 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
465 HOW (R_PPC_GOT_TLSGD16_HI, 1, 16, 0xffff, 16, FALSE, dont,
466 ppc_elf_unhandled_reloc),
467
468 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
469 HOW (R_PPC_GOT_TLSGD16_HA, 1, 16, 0xffff, 16, FALSE, dont,
470 ppc_elf_unhandled_reloc),
471
472 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
473 with values (sym+add)@dtpmod and zero, and computes the offset to the
474 first entry. */
475 HOW (R_PPC_GOT_TLSLD16, 1, 16, 0xffff, 0, FALSE, signed,
476 ppc_elf_unhandled_reloc),
477
478 /* Like GOT_TLSLD16, but no overflow. */
479 HOW (R_PPC_GOT_TLSLD16_LO, 1, 16, 0xffff, 0, FALSE, dont,
480 ppc_elf_unhandled_reloc),
481
482 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
483 HOW (R_PPC_GOT_TLSLD16_HI, 1, 16, 0xffff, 16, FALSE, dont,
484 ppc_elf_unhandled_reloc),
485
486 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
487 HOW (R_PPC_GOT_TLSLD16_HA, 1, 16, 0xffff, 16, FALSE, dont,
488 ppc_elf_unhandled_reloc),
489
490 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
491 the offset to the entry. */
492 HOW (R_PPC_GOT_DTPREL16, 1, 16, 0xffff, 0, FALSE, signed,
493 ppc_elf_unhandled_reloc),
494
495 /* Like GOT_DTPREL16, but no overflow. */
496 HOW (R_PPC_GOT_DTPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
497 ppc_elf_unhandled_reloc),
498
499 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
500 HOW (R_PPC_GOT_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, dont,
501 ppc_elf_unhandled_reloc),
502
503 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
504 HOW (R_PPC_GOT_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, dont,
505 ppc_elf_unhandled_reloc),
506
507 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
508 offset to the entry. */
509 HOW (R_PPC_GOT_TPREL16, 1, 16, 0xffff, 0, FALSE, signed,
510 ppc_elf_unhandled_reloc),
511
512 /* Like GOT_TPREL16, but no overflow. */
513 HOW (R_PPC_GOT_TPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont,
514 ppc_elf_unhandled_reloc),
515
516 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
517 HOW (R_PPC_GOT_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, dont,
518 ppc_elf_unhandled_reloc),
519
520 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
521 HOW (R_PPC_GOT_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, dont,
522 ppc_elf_unhandled_reloc),
523
524 /* The remaining relocs are from the Embedded ELF ABI, and are not
525 in the SVR4 ELF ABI. */
526
527 /* 32 bit value resulting from the addend minus the symbol. */
528 HOW (R_PPC_EMB_NADDR32, 2, 32, 0xffffffff, 0, FALSE, dont,
529 ppc_elf_unhandled_reloc),
530
531 /* 16 bit value resulting from the addend minus the symbol. */
532 HOW (R_PPC_EMB_NADDR16, 1, 16, 0xffff, 0, FALSE, signed,
533 ppc_elf_unhandled_reloc),
534
535 /* 16 bit value resulting from the addend minus the symbol. */
536 HOW (R_PPC_EMB_NADDR16_LO, 1, 16, 0xffff, 0, FALSE, dont,
537 ppc_elf_unhandled_reloc),
538
539 /* The high order 16 bits of the addend minus the symbol. */
540 HOW (R_PPC_EMB_NADDR16_HI, 1, 16, 0xffff, 16, FALSE, dont,
541 ppc_elf_unhandled_reloc),
542
543 /* The high order 16 bits of the result of the addend minus the address,
544 plus 1 if the contents of the low 16 bits, treated as a signed number,
545 is negative. */
546 HOW (R_PPC_EMB_NADDR16_HA, 1, 16, 0xffff, 16, FALSE, dont,
547 ppc_elf_unhandled_reloc),
548
549 /* 16 bit value resulting from allocating a 4 byte word to hold an
550 address in the .sdata section, and returning the offset from
551 _SDA_BASE_ for that relocation. */
552 HOW (R_PPC_EMB_SDAI16, 1, 16, 0xffff, 0, FALSE, signed,
553 ppc_elf_unhandled_reloc),
554
555 /* 16 bit value resulting from allocating a 4 byte word to hold an
556 address in the .sdata2 section, and returning the offset from
557 _SDA2_BASE_ for that relocation. */
558 HOW (R_PPC_EMB_SDA2I16, 1, 16, 0xffff, 0, FALSE, signed,
559 ppc_elf_unhandled_reloc),
560
561 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
562 small data items. */
563 HOW (R_PPC_EMB_SDA2REL, 1, 16, 0xffff, 0, FALSE, signed,
564 ppc_elf_unhandled_reloc),
565
566 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
567 signed offset from the appropriate base, and filling in the register
568 field with the appropriate register (0, 2, or 13). */
569 HOW (R_PPC_EMB_SDA21, 2, 16, 0xffff, 0, FALSE, signed,
570 ppc_elf_unhandled_reloc),
571
572 /* Relocation not handled: R_PPC_EMB_MRKREF */
573 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
574 /* Relocation not handled: R_PPC_EMB_RELST_LO */
575 /* Relocation not handled: R_PPC_EMB_RELST_HI */
576 /* Relocation not handled: R_PPC_EMB_RELST_HA */
577 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
578
579 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
580 in the 16 bit signed offset from the appropriate base, and filling in the
581 register field with the appropriate register (0, 2, or 13). */
582 HOW (R_PPC_EMB_RELSDA, 1, 16, 0xffff, 0, FALSE, signed,
583 ppc_elf_unhandled_reloc),
584
585 /* A relative 8 bit branch. */
586 HOW (R_PPC_VLE_REL8, 1, 8, 0xff, 1, TRUE, signed,
587 bfd_elf_generic_reloc),
588
589 /* A relative 15 bit branch. */
590 HOW (R_PPC_VLE_REL15, 2, 16, 0xfffe, 0, TRUE, signed,
591 bfd_elf_generic_reloc),
592
593 /* A relative 24 bit branch. */
594 HOW (R_PPC_VLE_REL24, 2, 25, 0x1fffffe, 0, TRUE, signed,
595 bfd_elf_generic_reloc),
596
597 /* The 16 LSBS in split16a format. */
598 HOW (R_PPC_VLE_LO16A, 2, 16, 0x1f07ff, 0, FALSE, dont,
599 ppc_elf_unhandled_reloc),
600
601 /* The 16 LSBS in split16d format. */
602 HOW (R_PPC_VLE_LO16D, 2, 16, 0x3e007ff, 0, FALSE, dont,
603 ppc_elf_unhandled_reloc),
604
605 /* Bits 16-31 split16a format. */
606 HOW (R_PPC_VLE_HI16A, 2, 16, 0x1f07ff, 16, FALSE, dont,
607 ppc_elf_unhandled_reloc),
608
609 /* Bits 16-31 split16d format. */
610 HOW (R_PPC_VLE_HI16D, 2, 16, 0x3e007ff, 16, FALSE, dont,
611 ppc_elf_unhandled_reloc),
612
613 /* Bits 16-31 (High Adjusted) in split16a format. */
614 HOW (R_PPC_VLE_HA16A, 2, 16, 0x1f07ff, 16, FALSE, dont,
615 ppc_elf_unhandled_reloc),
616
617 /* Bits 16-31 (High Adjusted) in split16d format. */
618 HOW (R_PPC_VLE_HA16D, 2, 16, 0x3e007ff, 16, FALSE, dont,
619 ppc_elf_unhandled_reloc),
620
621 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
622 instructions. If the register base is 0 then the linker changes
623 the e_add16i to an e_li instruction. */
624 HOW (R_PPC_VLE_SDA21, 2, 16, 0xffff, 0, FALSE, signed,
625 ppc_elf_unhandled_reloc),
626
627 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
628 HOW (R_PPC_VLE_SDA21_LO, 2, 16, 0xffff, 0, FALSE, dont,
629 ppc_elf_unhandled_reloc),
630
631 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
632 HOW (R_PPC_VLE_SDAREL_LO16A, 2, 16, 0x1f07ff, 0, FALSE, dont,
633 ppc_elf_unhandled_reloc),
634
635 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
636 HOW (R_PPC_VLE_SDAREL_LO16D, 2, 16, 0x3e007ff, 0, FALSE, dont,
637 ppc_elf_unhandled_reloc),
638
639 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
640 HOW (R_PPC_VLE_SDAREL_HI16A, 2, 16, 0x1f07ff, 16, FALSE, dont,
641 ppc_elf_unhandled_reloc),
642
643 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
644 HOW (R_PPC_VLE_SDAREL_HI16D, 2, 16, 0x3e007ff, 16, FALSE, dont,
645 ppc_elf_unhandled_reloc),
646
647 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
648 HOW (R_PPC_VLE_SDAREL_HA16A, 2, 16, 0x1f07ff, 16, FALSE, dont,
649 ppc_elf_unhandled_reloc),
650
651 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
652 HOW (R_PPC_VLE_SDAREL_HA16D, 2, 16, 0x3e007ff, 16, FALSE, dont,
653 ppc_elf_unhandled_reloc),
654
655 /* e_li split20 format. */
656 HOW (R_PPC_VLE_ADDR20, 2, 20, 0x1f7fff, 0, FALSE, dont,
657 ppc_elf_unhandled_reloc),
658
659 HOW (R_PPC_IRELATIVE, 2, 32, 0xffffffff, 0, FALSE, dont,
660 ppc_elf_unhandled_reloc),
661
662 /* A 16 bit relative relocation. */
663 HOW (R_PPC_REL16, 1, 16, 0xffff, 0, TRUE, signed,
664 bfd_elf_generic_reloc),
665
666 /* A 16 bit relative relocation without overflow. */
667 HOW (R_PPC_REL16_LO, 1, 16, 0xffff, 0, TRUE, dont,
668 bfd_elf_generic_reloc),
669
670 /* The high order 16 bits of a relative address. */
671 HOW (R_PPC_REL16_HI, 1, 16, 0xffff, 16, TRUE, dont,
672 bfd_elf_generic_reloc),
673
674 /* The high order 16 bits of a relative address, plus 1 if the contents of
675 the low 16 bits, treated as a signed number, is negative. */
676 HOW (R_PPC_REL16_HA, 1, 16, 0xffff, 16, TRUE, dont,
677 ppc_elf_addr16_ha_reloc),
678
679 /* Like R_PPC_REL16_HA but for split field in addpcis. */
680 HOW (R_PPC_REL16DX_HA, 2, 16, 0x1fffc1, 16, TRUE, signed,
681 ppc_elf_addr16_ha_reloc),
682
683 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
684 HOW (R_PPC_16DX_HA, 2, 16, 0x1fffc1, 16, FALSE, signed,
685 ppc_elf_addr16_ha_reloc),
686
687 /* GNU extension to record C++ vtable hierarchy. */
688 HOW (R_PPC_GNU_VTINHERIT, 0, 0, 0, 0, FALSE, dont,
689 NULL),
690
691 /* GNU extension to record C++ vtable member usage. */
692 HOW (R_PPC_GNU_VTENTRY, 0, 0, 0, 0, FALSE, dont,
693 NULL),
694
695 /* Phony reloc to handle AIX style TOC entries. */
696 HOW (R_PPC_TOC16, 1, 16, 0xffff, 0, FALSE, signed,
697 ppc_elf_unhandled_reloc),
698 };
699
700 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
702
703 static void
704 ppc_elf_howto_init (void)
705 {
706 unsigned int i, type;
707
708 for (i = 0;
709 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
710 i++)
711 {
712 type = ppc_elf_howto_raw[i].type;
713 if (type >= (sizeof (ppc_elf_howto_table)
714 / sizeof (ppc_elf_howto_table[0])))
715 abort ();
716 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
717 }
718 }
719
720 static reloc_howto_type *
721 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
722 bfd_reloc_code_real_type code)
723 {
724 enum elf_ppc_reloc_type r;
725
726 /* Initialize howto table if not already done. */
727 if (!ppc_elf_howto_table[R_PPC_ADDR32])
728 ppc_elf_howto_init ();
729
730 switch (code)
731 {
732 default:
733 return NULL;
734
735 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
736 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
737 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
738 case BFD_RELOC_PPC64_ADDR16_DS:
739 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
740 case BFD_RELOC_PPC64_ADDR16_LO_DS:
741 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
742 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
743 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
744 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
745 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
746 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
747 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
748 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
749 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
750 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
751 case BFD_RELOC_PPC64_GOT16_DS:
752 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
753 case BFD_RELOC_PPC64_GOT16_LO_DS:
754 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
755 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
756 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
757 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
758 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
759 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
760 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
761 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
762 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
763 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
764 case BFD_RELOC_PPC64_PLT16_LO_DS:
765 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
766 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
767 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
768 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
769 case BFD_RELOC_PPC64_SECTOFF_DS:
770 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
771 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
772 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
773 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
774 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
775 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
776 case BFD_RELOC_PPC64_TOC16_DS:
777 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
778 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
779 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
780 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
781 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
782 case BFD_RELOC_PPC64_TPREL16_DS:
783 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
784 case BFD_RELOC_PPC64_TPREL16_LO_DS:
785 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
786 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
787 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
788 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
789 case BFD_RELOC_PPC64_DTPREL16_DS:
790 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
791 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
792 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
793 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
794 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
795 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
796 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
797 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
798 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
799 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
800 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
801 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
802 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
803 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
804 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
805 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
806 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
807 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
808 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
809 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
810 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
811 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
812 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
813 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
814 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
815 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
816 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
817 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
818 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
819 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
820 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
821 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
822 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
823 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
824 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
825 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
826 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
827 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
828 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
829 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
830 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
831 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
832 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
833 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
834 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
835 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
836 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
837 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
838 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
839 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
840 r = R_PPC_VLE_SDAREL_LO16A;
841 break;
842 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
843 r = R_PPC_VLE_SDAREL_LO16D;
844 break;
845 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
846 r = R_PPC_VLE_SDAREL_HI16A;
847 break;
848 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
849 r = R_PPC_VLE_SDAREL_HI16D;
850 break;
851 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
852 r = R_PPC_VLE_SDAREL_HA16A;
853 break;
854 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
855 r = R_PPC_VLE_SDAREL_HA16D;
856 break;
857 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
858 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
859 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
860 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
861 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
862 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
863 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
864 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
865 }
866
867 return ppc_elf_howto_table[r];
868 };
869
870 static reloc_howto_type *
871 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
872 const char *r_name)
873 {
874 unsigned int i;
875
876 for (i = 0;
877 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
878 i++)
879 if (ppc_elf_howto_raw[i].name != NULL
880 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
881 return &ppc_elf_howto_raw[i];
882
883 return NULL;
884 }
885
886 /* Set the howto pointer for a PowerPC ELF reloc. */
887
888 static bfd_boolean
889 ppc_elf_info_to_howto (bfd *abfd,
890 arelent *cache_ptr,
891 Elf_Internal_Rela *dst)
892 {
893 unsigned int r_type;
894
895 /* Initialize howto table if not already done. */
896 if (!ppc_elf_howto_table[R_PPC_ADDR32])
897 ppc_elf_howto_init ();
898
899 r_type = ELF32_R_TYPE (dst->r_info);
900 if (r_type >= R_PPC_max)
901 {
902 /* xgettext:c-format */
903 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
904 abfd, r_type);
905 bfd_set_error (bfd_error_bad_value);
906 return FALSE;
907 }
908
909 cache_ptr->howto = ppc_elf_howto_table[r_type];
910
911 /* Just because the above assert didn't trigger doesn't mean that
912 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
913 if (cache_ptr->howto == NULL)
914 {
915 /* xgettext:c-format */
916 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
917 abfd, r_type);
918 bfd_set_error (bfd_error_bad_value);
919
920 return FALSE;
921 }
922
923 return TRUE;
924 }
925
926 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
927
928 static bfd_reloc_status_type
929 ppc_elf_addr16_ha_reloc (bfd *abfd,
930 arelent *reloc_entry,
931 asymbol *symbol,
932 void *data,
933 asection *input_section,
934 bfd *output_bfd,
935 char **error_message ATTRIBUTE_UNUSED)
936 {
937 enum elf_ppc_reloc_type r_type;
938 long insn;
939 bfd_size_type octets;
940 bfd_vma value;
941
942 if (output_bfd != NULL)
943 {
944 reloc_entry->address += input_section->output_offset;
945 return bfd_reloc_ok;
946 }
947
948 reloc_entry->addend += 0x8000;
949 r_type = reloc_entry->howto->type;
950 if (r_type != R_PPC_REL16DX_HA)
951 return bfd_reloc_continue;
952
953 value = 0;
954 if (!bfd_is_com_section (symbol->section))
955 value = symbol->value;
956 value += (reloc_entry->addend
957 + symbol->section->output_offset
958 + symbol->section->output_section->vma);
959 value -= (reloc_entry->address
960 + input_section->output_offset
961 + input_section->output_section->vma);
962 value >>= 16;
963
964 octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section);
965 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
966 insn &= ~0x1fffc1;
967 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
968 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
969 return bfd_reloc_ok;
970 }
971
972 static bfd_reloc_status_type
973 ppc_elf_unhandled_reloc (bfd *abfd,
974 arelent *reloc_entry,
975 asymbol *symbol,
976 void *data,
977 asection *input_section,
978 bfd *output_bfd,
979 char **error_message)
980 {
981 /* If this is a relocatable link (output_bfd test tells us), just
982 call the generic function. Any adjustment will be done at final
983 link time. */
984 if (output_bfd != NULL)
985 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
986 input_section, output_bfd, error_message);
987
988 if (error_message != NULL)
989 {
990 static char buf[60];
991 sprintf (buf, _("generic linker can't handle %s"),
992 reloc_entry->howto->name);
993 *error_message = buf;
994 }
995 return bfd_reloc_dangerous;
996 }
997
998 /* Sections created by the linker. */
1000
1001 typedef struct elf_linker_section
1002 {
1003 /* Pointer to the bfd section. */
1004 asection *section;
1005 /* Section name. */
1006 const char *name;
1007 /* Associated bss section name. */
1008 const char *bss_name;
1009 /* Associated symbol name. */
1010 const char *sym_name;
1011 /* Associated symbol. */
1012 struct elf_link_hash_entry *sym;
1013 } elf_linker_section_t;
1014
1015 /* Linked list of allocated pointer entries. This hangs off of the
1016 symbol lists, and provides allows us to return different pointers,
1017 based on different addend's. */
1018
1019 typedef struct elf_linker_section_pointers
1020 {
1021 /* next allocated pointer for this symbol */
1022 struct elf_linker_section_pointers *next;
1023 /* offset of pointer from beginning of section */
1024 bfd_vma offset;
1025 /* addend used */
1026 bfd_vma addend;
1027 /* which linker section this is */
1028 elf_linker_section_t *lsect;
1029 } elf_linker_section_pointers_t;
1030
1031 struct ppc_elf_obj_tdata
1032 {
1033 struct elf_obj_tdata elf;
1034
1035 /* A mapping from local symbols to offsets into the various linker
1036 sections added. This is index by the symbol index. */
1037 elf_linker_section_pointers_t **linker_section_pointers;
1038
1039 /* Flags used to auto-detect plt type. */
1040 unsigned int makes_plt_call : 1;
1041 unsigned int has_rel16 : 1;
1042 };
1043
1044 #define ppc_elf_tdata(bfd) \
1045 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1046
1047 #define elf_local_ptr_offsets(bfd) \
1048 (ppc_elf_tdata (bfd)->linker_section_pointers)
1049
1050 #define is_ppc_elf(bfd) \
1051 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1052 && elf_object_id (bfd) == PPC32_ELF_DATA)
1053
1054 /* Override the generic function because we store some extras. */
1055
1056 static bfd_boolean
1057 ppc_elf_mkobject (bfd *abfd)
1058 {
1059 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1060 PPC32_ELF_DATA);
1061 }
1062
1063 /* When defaulting arch/mach, decode apuinfo to find a better match. */
1064
1065 bfd_boolean
1066 _bfd_elf_ppc_set_arch (bfd *abfd)
1067 {
1068 unsigned long mach = 0;
1069 asection *s;
1070 unsigned char *contents;
1071
1072 if (abfd->arch_info->bits_per_word == 32
1073 && bfd_big_endian (abfd))
1074 {
1075
1076 for (s = abfd->sections; s != NULL; s = s->next)
1077 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
1078 break;
1079 if (s != NULL)
1080 mach = bfd_mach_ppc_vle;
1081 }
1082
1083 if (mach == 0)
1084 {
1085 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1086 if (s != NULL
1087 && s->size >= 24
1088 && bfd_malloc_and_get_section (abfd, s, &contents))
1089 {
1090 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
1091 unsigned int i;
1092
1093 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
1094 {
1095 unsigned int val = bfd_get_32 (abfd, contents + i);
1096 switch (val >> 16)
1097 {
1098 case PPC_APUINFO_PMR:
1099 case PPC_APUINFO_RFMCI:
1100 if (mach == 0)
1101 mach = bfd_mach_ppc_titan;
1102 break;
1103
1104 case PPC_APUINFO_ISEL:
1105 case PPC_APUINFO_CACHELCK:
1106 if (mach == bfd_mach_ppc_titan)
1107 mach = bfd_mach_ppc_e500mc;
1108 break;
1109
1110 case PPC_APUINFO_SPE:
1111 case PPC_APUINFO_EFS:
1112 case PPC_APUINFO_BRLOCK:
1113 if (mach != bfd_mach_ppc_vle)
1114 mach = bfd_mach_ppc_e500;
1115 break;
1116
1117 case PPC_APUINFO_VLE:
1118 mach = bfd_mach_ppc_vle;
1119 break;
1120
1121 default:
1122 mach = -1ul;
1123 }
1124 }
1125 free (contents);
1126 }
1127 }
1128
1129 if (mach != 0 && mach != -1ul)
1130 {
1131 const bfd_arch_info_type *arch;
1132
1133 for (arch = abfd->arch_info->next; arch; arch = arch->next)
1134 if (arch->mach == mach)
1135 {
1136 abfd->arch_info = arch;
1137 break;
1138 }
1139 }
1140 return TRUE;
1141 }
1142
1143 /* Fix bad default arch selected for a 32 bit input bfd when the
1144 default is 64 bit. Also select arch based on apuinfo. */
1145
1146 static bfd_boolean
1147 ppc_elf_object_p (bfd *abfd)
1148 {
1149 if (!abfd->arch_info->the_default)
1150 return TRUE;
1151
1152 if (abfd->arch_info->bits_per_word == 64)
1153 {
1154 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1155
1156 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1157 {
1158 /* Relies on arch after 64 bit default being 32 bit default. */
1159 abfd->arch_info = abfd->arch_info->next;
1160 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1161 }
1162 }
1163 return _bfd_elf_ppc_set_arch (abfd);
1164 }
1165
1166 /* Function to set whether a module needs the -mrelocatable bit set. */
1167
1168 static bfd_boolean
1169 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1170 {
1171 BFD_ASSERT (!elf_flags_init (abfd)
1172 || elf_elfheader (abfd)->e_flags == flags);
1173
1174 elf_elfheader (abfd)->e_flags = flags;
1175 elf_flags_init (abfd) = TRUE;
1176 return TRUE;
1177 }
1178
1179 /* Support for core dump NOTE sections. */
1180
1181 static bfd_boolean
1182 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1183 {
1184 int offset;
1185 unsigned int size;
1186
1187 switch (note->descsz)
1188 {
1189 default:
1190 return FALSE;
1191
1192 case 268: /* Linux/PPC. */
1193 /* pr_cursig */
1194 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
1195
1196 /* pr_pid */
1197 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
1198
1199 /* pr_reg */
1200 offset = 72;
1201 size = 192;
1202
1203 break;
1204 }
1205
1206 /* Make a ".reg/999" section. */
1207 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1208 size, note->descpos + offset);
1209 }
1210
1211 static bfd_boolean
1212 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1213 {
1214 switch (note->descsz)
1215 {
1216 default:
1217 return FALSE;
1218
1219 case 128: /* Linux/PPC elf_prpsinfo. */
1220 elf_tdata (abfd)->core->pid
1221 = bfd_get_32 (abfd, note->descdata + 16);
1222 elf_tdata (abfd)->core->program
1223 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1224 elf_tdata (abfd)->core->command
1225 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1226 }
1227
1228 /* Note that for some reason, a spurious space is tacked
1229 onto the end of the args in some (at least one anyway)
1230 implementations, so strip it off if it exists. */
1231
1232 {
1233 char *command = elf_tdata (abfd)->core->command;
1234 int n = strlen (command);
1235
1236 if (0 < n && command[n - 1] == ' ')
1237 command[n - 1] = '\0';
1238 }
1239
1240 return TRUE;
1241 }
1242
1243 static char *
1244 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1245 {
1246 switch (note_type)
1247 {
1248 default:
1249 return NULL;
1250
1251 case NT_PRPSINFO:
1252 {
1253 char data[128] ATTRIBUTE_NONSTRING;
1254 va_list ap;
1255
1256 va_start (ap, note_type);
1257 memset (data, 0, sizeof (data));
1258 strncpy (data + 32, va_arg (ap, const char *), 16);
1259 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
1260 DIAGNOSTIC_PUSH;
1261 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
1262 -Wstringop-truncation:
1263 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
1264 */
1265 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
1266 #endif
1267 strncpy (data + 48, va_arg (ap, const char *), 80);
1268 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
1269 DIAGNOSTIC_POP;
1270 #endif
1271 va_end (ap);
1272 return elfcore_write_note (abfd, buf, bufsiz,
1273 "CORE", note_type, data, sizeof (data));
1274 }
1275
1276 case NT_PRSTATUS:
1277 {
1278 char data[268];
1279 va_list ap;
1280 long pid;
1281 int cursig;
1282 const void *greg;
1283
1284 va_start (ap, note_type);
1285 memset (data, 0, 72);
1286 pid = va_arg (ap, long);
1287 bfd_put_32 (abfd, pid, data + 24);
1288 cursig = va_arg (ap, int);
1289 bfd_put_16 (abfd, cursig, data + 12);
1290 greg = va_arg (ap, const void *);
1291 memcpy (data + 72, greg, 192);
1292 memset (data + 264, 0, 4);
1293 va_end (ap);
1294 return elfcore_write_note (abfd, buf, bufsiz,
1295 "CORE", note_type, data, sizeof (data));
1296 }
1297 }
1298 }
1299
1300 static flagword
1301 ppc_elf_lookup_section_flags (char *flag_name)
1302 {
1303
1304 if (!strcmp (flag_name, "SHF_PPC_VLE"))
1305 return SHF_PPC_VLE;
1306
1307 return 0;
1308 }
1309
1310 /* Return address for Ith PLT stub in section PLT, for relocation REL
1311 or (bfd_vma) -1 if it should not be included. */
1312
1313 static bfd_vma
1314 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1315 const asection *plt ATTRIBUTE_UNUSED,
1316 const arelent *rel)
1317 {
1318 return rel->address;
1319 }
1320
1321 /* Handle a PowerPC specific section when reading an object file. This
1322 is called when bfd_section_from_shdr finds a section with an unknown
1323 type. */
1324
1325 static bfd_boolean
1326 ppc_elf_section_from_shdr (bfd *abfd,
1327 Elf_Internal_Shdr *hdr,
1328 const char *name,
1329 int shindex)
1330 {
1331 asection *newsect;
1332 flagword flags;
1333
1334 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1335 return FALSE;
1336
1337 newsect = hdr->bfd_section;
1338 flags = bfd_section_flags (newsect);
1339 if (hdr->sh_flags & SHF_EXCLUDE)
1340 flags |= SEC_EXCLUDE;
1341
1342 if (hdr->sh_type == SHT_ORDERED)
1343 flags |= SEC_SORT_ENTRIES;
1344
1345 bfd_set_section_flags (newsect, flags);
1346 return TRUE;
1347 }
1348
1349 /* Set up any other section flags and such that may be necessary. */
1350
1351 static bfd_boolean
1352 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1353 Elf_Internal_Shdr *shdr,
1354 asection *asect)
1355 {
1356 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1357 shdr->sh_type = SHT_ORDERED;
1358
1359 return TRUE;
1360 }
1361
1362 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1363 need to bump up the number of section headers. */
1364
1365 static int
1366 ppc_elf_additional_program_headers (bfd *abfd,
1367 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1368 {
1369 asection *s;
1370 int ret = 0;
1371
1372 s = bfd_get_section_by_name (abfd, ".sbss2");
1373 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1374 ++ret;
1375
1376 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1377 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1378 ++ret;
1379
1380 return ret;
1381 }
1382
1383 /* Modify the segment map for VLE executables. */
1384
1385 bfd_boolean
1386 ppc_elf_modify_segment_map (bfd *abfd,
1387 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1388 {
1389 struct elf_segment_map *m;
1390
1391 /* At this point in the link, output sections have already been sorted by
1392 LMA and assigned to segments. All that is left to do is to ensure
1393 there is no mixing of VLE & non-VLE sections in a text segment.
1394 If we find that case, we split the segment.
1395 We maintain the original output section order. */
1396
1397 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
1398 {
1399 struct elf_segment_map *n;
1400 bfd_size_type amt;
1401 unsigned int j, k;
1402 unsigned int p_flags;
1403
1404 if (m->p_type != PT_LOAD || m->count == 0)
1405 continue;
1406
1407 for (p_flags = PF_R, j = 0; j != m->count; ++j)
1408 {
1409 if ((m->sections[j]->flags & SEC_READONLY) == 0)
1410 p_flags |= PF_W;
1411 if ((m->sections[j]->flags & SEC_CODE) != 0)
1412 {
1413 p_flags |= PF_X;
1414 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
1415 p_flags |= PF_PPC_VLE;
1416 break;
1417 }
1418 }
1419 if (j != m->count)
1420 while (++j != m->count)
1421 {
1422 unsigned int p_flags1 = PF_R;
1423
1424 if ((m->sections[j]->flags & SEC_READONLY) == 0)
1425 p_flags1 |= PF_W;
1426 if ((m->sections[j]->flags & SEC_CODE) != 0)
1427 {
1428 p_flags1 |= PF_X;
1429 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
1430 p_flags1 |= PF_PPC_VLE;
1431 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
1432 break;
1433 }
1434 p_flags |= p_flags1;
1435 }
1436 /* If we're splitting a segment which originally contained rw
1437 sections then those sections might now only be in one of the
1438 two parts. So always set p_flags if splitting, even if we
1439 are being called for objcopy with p_flags_valid set. */
1440 if (j != m->count || !m->p_flags_valid)
1441 {
1442 m->p_flags_valid = 1;
1443 m->p_flags = p_flags;
1444 }
1445 if (j == m->count)
1446 continue;
1447
1448 /* Sections 0..j-1 stay in this (current) segment,
1449 the remainder are put in a new segment.
1450 The scan resumes with the new segment. */
1451
1452 amt = sizeof (struct elf_segment_map);
1453 amt += (m->count - j - 1) * sizeof (asection *);
1454 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
1455 if (n == NULL)
1456 return FALSE;
1457
1458 n->p_type = PT_LOAD;
1459 n->count = m->count - j;
1460 for (k = 0; k < n->count; ++k)
1461 n->sections[k] = m->sections[j + k];
1462 m->count = j;
1463 m->p_size_valid = 0;
1464 n->next = m->next;
1465 m->next = n;
1466 }
1467
1468 return TRUE;
1469 }
1470
1471 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1472 .PPC.EMB.sbss0 a normal section, and not a bss section so
1473 that the linker doesn't crater when trying to make more than
1474 2 sections. */
1475
1476 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1477 {
1478 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1479 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1480 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1481 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1482 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1483 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1484 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
1485 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1486 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1487 { NULL, 0, 0, 0, 0 }
1488 };
1489
1490 /* This is what we want for new plt/got. */
1491 static struct bfd_elf_special_section ppc_alt_plt =
1492 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1493
1494 static const struct bfd_elf_special_section *
1495 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
1496 {
1497 const struct bfd_elf_special_section *ssect;
1498
1499 /* See if this is one of the special sections. */
1500 if (sec->name == NULL)
1501 return NULL;
1502
1503 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1504 sec->use_rela_p);
1505 if (ssect != NULL)
1506 {
1507 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1508 ssect = &ppc_alt_plt;
1509 return ssect;
1510 }
1511
1512 return _bfd_elf_get_sec_type_attr (abfd, sec);
1513 }
1514
1515 /* Very simple linked list structure for recording apuinfo values. */
1517 typedef struct apuinfo_list
1518 {
1519 struct apuinfo_list *next;
1520 unsigned long value;
1521 }
1522 apuinfo_list;
1523
1524 static apuinfo_list *head;
1525 static bfd_boolean apuinfo_set;
1526
1527 static void
1528 apuinfo_list_init (void)
1529 {
1530 head = NULL;
1531 apuinfo_set = FALSE;
1532 }
1533
1534 static void
1535 apuinfo_list_add (unsigned long value)
1536 {
1537 apuinfo_list *entry = head;
1538
1539 while (entry != NULL)
1540 {
1541 if (entry->value == value)
1542 return;
1543 entry = entry->next;
1544 }
1545
1546 entry = bfd_malloc (sizeof (* entry));
1547 if (entry == NULL)
1548 return;
1549
1550 entry->value = value;
1551 entry->next = head;
1552 head = entry;
1553 }
1554
1555 static unsigned
1556 apuinfo_list_length (void)
1557 {
1558 apuinfo_list *entry;
1559 unsigned long count;
1560
1561 for (entry = head, count = 0;
1562 entry;
1563 entry = entry->next)
1564 ++ count;
1565
1566 return count;
1567 }
1568
1569 static inline unsigned long
1570 apuinfo_list_element (unsigned long number)
1571 {
1572 apuinfo_list * entry;
1573
1574 for (entry = head;
1575 entry && number --;
1576 entry = entry->next)
1577 ;
1578
1579 return entry ? entry->value : 0;
1580 }
1581
1582 static void
1583 apuinfo_list_finish (void)
1584 {
1585 apuinfo_list *entry;
1586
1587 for (entry = head; entry;)
1588 {
1589 apuinfo_list *next = entry->next;
1590 free (entry);
1591 entry = next;
1592 }
1593
1594 head = NULL;
1595 }
1596
1597 /* Scan the input BFDs and create a linked list of
1598 the APUinfo values that will need to be emitted. */
1599
1600 static void
1601 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
1602 {
1603 bfd *ibfd;
1604 asection *asec;
1605 char *buffer = NULL;
1606 bfd_size_type largest_input_size = 0;
1607 unsigned i;
1608 unsigned long length;
1609 const char *error_message = NULL;
1610
1611 if (link_info == NULL)
1612 return;
1613
1614 apuinfo_list_init ();
1615
1616 /* Read in the input sections contents. */
1617 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
1618 {
1619 unsigned long datum;
1620
1621 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1622 if (asec == NULL)
1623 continue;
1624
1625 /* xgettext:c-format */
1626 error_message = _("corrupt %s section in %pB");
1627 length = asec->size;
1628 if (length < 20)
1629 goto fail;
1630
1631 apuinfo_set = TRUE;
1632 if (largest_input_size < asec->size)
1633 {
1634 if (buffer)
1635 free (buffer);
1636 largest_input_size = asec->size;
1637 buffer = bfd_malloc (largest_input_size);
1638 if (!buffer)
1639 return;
1640 }
1641
1642 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
1643 || (bfd_bread (buffer, length, ibfd) != length))
1644 {
1645 /* xgettext:c-format */
1646 error_message = _("unable to read in %s section from %pB");
1647 goto fail;
1648 }
1649
1650 /* Verify the contents of the header. Note - we have to
1651 extract the values this way in order to allow for a
1652 host whose endian-ness is different from the target. */
1653 datum = bfd_get_32 (ibfd, buffer);
1654 if (datum != sizeof APUINFO_LABEL)
1655 goto fail;
1656
1657 datum = bfd_get_32 (ibfd, buffer + 8);
1658 if (datum != 0x2)
1659 goto fail;
1660
1661 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
1662 goto fail;
1663
1664 /* Get the number of bytes used for apuinfo entries. */
1665 datum = bfd_get_32 (ibfd, buffer + 4);
1666 if (datum + 20 != length)
1667 goto fail;
1668
1669 /* Scan the apuinfo section, building a list of apuinfo numbers. */
1670 for (i = 0; i < datum; i += 4)
1671 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
1672 }
1673
1674 error_message = NULL;
1675
1676 if (apuinfo_set)
1677 {
1678 /* Compute the size of the output section. */
1679 unsigned num_entries = apuinfo_list_length ();
1680
1681 /* Set the output section size, if it exists. */
1682 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1683
1684 if (asec && !bfd_set_section_size (asec, 20 + num_entries * 4))
1685 {
1686 ibfd = abfd;
1687 /* xgettext:c-format */
1688 error_message = _("warning: unable to set size of %s section in %pB");
1689 }
1690 }
1691
1692 fail:
1693 if (buffer)
1694 free (buffer);
1695
1696 if (error_message)
1697 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
1698 }
1699
1700 /* Prevent the output section from accumulating the input sections'
1701 contents. We have already stored this in our linked list structure. */
1702
1703 static bfd_boolean
1704 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
1705 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
1706 asection *asec,
1707 bfd_byte *contents ATTRIBUTE_UNUSED)
1708 {
1709 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
1710 }
1711
1712 /* Finally we can generate the output section. */
1713
1714 static void
1715 ppc_final_write_processing (bfd *abfd)
1716 {
1717 bfd_byte *buffer;
1718 asection *asec;
1719 unsigned i;
1720 unsigned num_entries;
1721 bfd_size_type length;
1722
1723 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1724 if (asec == NULL)
1725 return;
1726
1727 if (!apuinfo_set)
1728 return;
1729
1730 length = asec->size;
1731 if (length < 20)
1732 return;
1733
1734 buffer = bfd_malloc (length);
1735 if (buffer == NULL)
1736 {
1737 _bfd_error_handler
1738 (_("failed to allocate space for new APUinfo section"));
1739 return;
1740 }
1741
1742 /* Create the apuinfo header. */
1743 num_entries = apuinfo_list_length ();
1744 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
1745 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
1746 bfd_put_32 (abfd, 0x2, buffer + 8);
1747 strcpy ((char *) buffer + 12, APUINFO_LABEL);
1748
1749 length = 20;
1750 for (i = 0; i < num_entries; i++)
1751 {
1752 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
1753 length += 4;
1754 }
1755
1756 if (length != asec->size)
1757 _bfd_error_handler (_("failed to compute new APUinfo section"));
1758
1759 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
1760 _bfd_error_handler (_("failed to install new APUinfo section"));
1761
1762 free (buffer);
1763
1764 apuinfo_list_finish ();
1765 }
1766
1767 static bfd_boolean
1768 ppc_elf_final_write_processing (bfd *abfd)
1769 {
1770 ppc_final_write_processing (abfd);
1771 return _bfd_elf_final_write_processing (abfd);
1772 }
1773
1774 static bfd_boolean
1776 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
1777 {
1778 bfd_byte buf[4 * 4];
1779
1780 if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf))
1781 return FALSE;
1782
1783 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
1784 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
1785 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
1786 && bfd_get_32 (abfd, buf + 12) == BCTR);
1787 }
1788
1789 static bfd_boolean
1790 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
1791 {
1792 bfd_vma vma = *(bfd_vma *) ptr;
1793 return ((section->flags & SEC_ALLOC) != 0
1794 && section->vma <= vma
1795 && vma < section->vma + section->size);
1796 }
1797
1798 static long
1799 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
1800 long dynsymcount, asymbol **dynsyms,
1801 asymbol **ret)
1802 {
1803 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
1804 asection *plt, *relplt, *dynamic, *glink;
1805 bfd_vma glink_vma = 0;
1806 bfd_vma resolv_vma = 0;
1807 bfd_vma stub_off;
1808 asymbol *s;
1809 arelent *p;
1810 size_t count, i, stub_delta;
1811 size_t size;
1812 char *names;
1813 bfd_byte buf[4];
1814
1815 *ret = NULL;
1816
1817 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
1818 return 0;
1819
1820 if (dynsymcount <= 0)
1821 return 0;
1822
1823 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
1824 if (relplt == NULL)
1825 return 0;
1826
1827 plt = bfd_get_section_by_name (abfd, ".plt");
1828 if (plt == NULL)
1829 return 0;
1830
1831 /* Call common code to handle old-style executable PLTs. */
1832 if (elf_section_flags (plt) & SHF_EXECINSTR)
1833 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
1834 dynsymcount, dynsyms, ret);
1835
1836 /* If this object was prelinked, the prelinker stored the address
1837 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
1838 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
1839 if (dynamic != NULL)
1840 {
1841 bfd_byte *dynbuf, *extdyn, *extdynend;
1842 size_t extdynsize;
1843 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1844
1845 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
1846 return -1;
1847
1848 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1849 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1850
1851 extdyn = dynbuf;
1852 extdynend = extdyn + dynamic->size;
1853 for (; extdyn < extdynend; extdyn += extdynsize)
1854 {
1855 Elf_Internal_Dyn dyn;
1856 (*swap_dyn_in) (abfd, extdyn, &dyn);
1857
1858 if (dyn.d_tag == DT_NULL)
1859 break;
1860
1861 if (dyn.d_tag == DT_PPC_GOT)
1862 {
1863 unsigned int g_o_t = dyn.d_un.d_val;
1864 asection *got = bfd_get_section_by_name (abfd, ".got");
1865 if (got != NULL
1866 && bfd_get_section_contents (abfd, got, buf,
1867 g_o_t - got->vma + 4, 4))
1868 glink_vma = bfd_get_32 (abfd, buf);
1869 break;
1870 }
1871 }
1872 free (dynbuf);
1873 }
1874
1875 /* Otherwise we read the first plt entry. */
1876 if (glink_vma == 0)
1877 {
1878 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
1879 glink_vma = bfd_get_32 (abfd, buf);
1880 }
1881
1882 if (glink_vma == 0)
1883 return 0;
1884
1885 /* The .glink section usually does not survive the final
1886 link; search for the section (usually .text) where the
1887 glink stubs now reside. */
1888 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
1889 if (glink == NULL)
1890 return 0;
1891
1892 /* Determine glink PLT resolver by reading the relative branch
1893 from the first glink stub. */
1894 if (bfd_get_section_contents (abfd, glink, buf,
1895 glink_vma - glink->vma, 4))
1896 {
1897 unsigned int insn = bfd_get_32 (abfd, buf);
1898
1899 /* The first glink stub may either branch to the resolver ... */
1900 insn ^= B;
1901 if ((insn & ~0x3fffffc) == 0)
1902 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
1903
1904 /* ... or fall through a bunch of NOPs. */
1905 else if ((insn ^ B ^ NOP) == 0)
1906 for (i = 4;
1907 bfd_get_section_contents (abfd, glink, buf,
1908 glink_vma - glink->vma + i, 4);
1909 i += 4)
1910 if (bfd_get_32 (abfd, buf) != NOP)
1911 {
1912 resolv_vma = glink_vma + i;
1913 break;
1914 }
1915 }
1916
1917 count = relplt->size / sizeof (Elf32_External_Rela);
1918 /* If the stubs are those for -shared/-pie then we might have
1919 multiple stubs for each plt entry. If that is the case then
1920 there is no way to associate stubs with their plt entries short
1921 of figuring out the GOT pointer value used in the stub.
1922 The offsets tested here need to cover all possible values of
1923 GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */
1924 stub_off = glink_vma - glink->vma;
1925 for (stub_delta = 16; stub_delta <= 32; stub_delta += 8)
1926 if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta))
1927 break;
1928 if (stub_delta > 32)
1929 return 0;
1930
1931 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
1932 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
1933 return -1;
1934
1935 size = count * sizeof (asymbol);
1936 p = relplt->relocation;
1937 for (i = 0; i < count; i++, p++)
1938 {
1939 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
1940 if (p->addend != 0)
1941 size += sizeof ("+0x") - 1 + 8;
1942 }
1943
1944 size += sizeof (asymbol) + sizeof ("__glink");
1945
1946 if (resolv_vma)
1947 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
1948
1949 s = *ret = bfd_malloc (size);
1950 if (s == NULL)
1951 return -1;
1952
1953 stub_off = glink_vma - glink->vma;
1954 names = (char *) (s + count + 1 + (resolv_vma != 0));
1955 p = relplt->relocation + count - 1;
1956 for (i = 0; i < count; i++)
1957 {
1958 size_t len;
1959
1960 stub_off -= stub_delta;
1961 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
1962 stub_off -= 32;
1963 *s = **p->sym_ptr_ptr;
1964 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
1965 we are defining a symbol, ensure one of them is set. */
1966 if ((s->flags & BSF_LOCAL) == 0)
1967 s->flags |= BSF_GLOBAL;
1968 s->flags |= BSF_SYNTHETIC;
1969 s->section = glink;
1970 s->value = stub_off;
1971 s->name = names;
1972 s->udata.p = NULL;
1973 len = strlen ((*p->sym_ptr_ptr)->name);
1974 memcpy (names, (*p->sym_ptr_ptr)->name, len);
1975 names += len;
1976 if (p->addend != 0)
1977 {
1978 memcpy (names, "+0x", sizeof ("+0x") - 1);
1979 names += sizeof ("+0x") - 1;
1980 bfd_sprintf_vma (abfd, names, p->addend);
1981 names += strlen (names);
1982 }
1983 memcpy (names, "@plt", sizeof ("@plt"));
1984 names += sizeof ("@plt");
1985 ++s;
1986 --p;
1987 }
1988
1989 /* Add a symbol at the start of the glink branch table. */
1990 memset (s, 0, sizeof *s);
1991 s->the_bfd = abfd;
1992 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
1993 s->section = glink;
1994 s->value = glink_vma - glink->vma;
1995 s->name = names;
1996 memcpy (names, "__glink", sizeof ("__glink"));
1997 names += sizeof ("__glink");
1998 s++;
1999 count++;
2000
2001 if (resolv_vma)
2002 {
2003 /* Add a symbol for the glink PLT resolver. */
2004 memset (s, 0, sizeof *s);
2005 s->the_bfd = abfd;
2006 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2007 s->section = glink;
2008 s->value = resolv_vma - glink->vma;
2009 s->name = names;
2010 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2011 names += sizeof ("__glink_PLTresolve");
2012 s++;
2013 count++;
2014 }
2015
2016 return count;
2017 }
2018
2019 /* The following functions are specific to the ELF linker, while
2021 functions above are used generally. They appear in this file more
2022 or less in the order in which they are called. eg.
2023 ppc_elf_check_relocs is called early in the link process,
2024 ppc_elf_finish_dynamic_sections is one of the last functions
2025 called. */
2026
2027 /* Track PLT entries needed for a given symbol. We might need more
2028 than one glink entry per symbol when generating a pic binary. */
2029 struct plt_entry
2030 {
2031 struct plt_entry *next;
2032
2033 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2034 This field stores the offset into .got2 used to initialise the
2035 GOT pointer reg. It will always be at least 32768. (Current
2036 gcc always uses an offset of 32768, but ld -r will pack .got2
2037 sections together resulting in larger offsets). */
2038 bfd_vma addend;
2039
2040 /* The .got2 section. */
2041 asection *sec;
2042
2043 /* PLT refcount or offset. */
2044 union
2045 {
2046 bfd_signed_vma refcount;
2047 bfd_vma offset;
2048 } plt;
2049
2050 /* .glink stub offset. */
2051 bfd_vma glink_offset;
2052 };
2053
2054 /* Of those relocs that might be copied as dynamic relocs, this
2055 function selects those that must be copied when linking a shared
2056 library or PIE, even when the symbol is local. */
2057
2058 static int
2059 must_be_dyn_reloc (struct bfd_link_info *info,
2060 enum elf_ppc_reloc_type r_type)
2061 {
2062 switch (r_type)
2063 {
2064 default:
2065 /* Only relative relocs can be resolved when the object load
2066 address isn't fixed. DTPREL32 is excluded because the
2067 dynamic linker needs to differentiate global dynamic from
2068 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
2069 return 1;
2070
2071 case R_PPC_REL24:
2072 case R_PPC_REL14:
2073 case R_PPC_REL14_BRTAKEN:
2074 case R_PPC_REL14_BRNTAKEN:
2075 case R_PPC_REL32:
2076 return 0;
2077
2078 case R_PPC_TPREL32:
2079 case R_PPC_TPREL16:
2080 case R_PPC_TPREL16_LO:
2081 case R_PPC_TPREL16_HI:
2082 case R_PPC_TPREL16_HA:
2083 /* These relocations are relative but in a shared library the
2084 linker doesn't know the thread pointer base. */
2085 return bfd_link_dll (info);
2086 }
2087 }
2088
2089 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2090 copying dynamic variables from a shared lib into an app's dynbss
2091 section, and instead use a dynamic relocation to point into the
2092 shared lib. */
2093 #define ELIMINATE_COPY_RELOCS 1
2094
2095 /* Used to track dynamic relocations for local symbols. */
2096 struct ppc_dyn_relocs
2097 {
2098 struct ppc_dyn_relocs *next;
2099
2100 /* The input section of the reloc. */
2101 asection *sec;
2102
2103 /* Total number of relocs copied for the input section. */
2104 unsigned int count : 31;
2105
2106 /* Whether this entry is for STT_GNU_IFUNC symbols. */
2107 unsigned int ifunc : 1;
2108 };
2109
2110 /* PPC ELF linker hash entry. */
2111
2112 struct ppc_elf_link_hash_entry
2113 {
2114 struct elf_link_hash_entry elf;
2115
2116 /* If this symbol is used in the linker created sections, the processor
2117 specific backend uses this field to map the field into the offset
2118 from the beginning of the section. */
2119 elf_linker_section_pointers_t *linker_section_pointer;
2120
2121 /* Track dynamic relocs copied for this symbol. */
2122 struct elf_dyn_relocs *dyn_relocs;
2123
2124 /* Contexts in which symbol is used in the GOT.
2125 Bits are or'd into the mask as the corresponding relocs are
2126 encountered during check_relocs, with TLS_TLS being set when any
2127 of the other TLS bits are set. tls_optimize clears bits when
2128 optimizing to indicate the corresponding GOT entry type is not
2129 needed. If set, TLS_TLS is never cleared. tls_optimize may also
2130 set TLS_GDIE when a GD reloc turns into an IE one.
2131 These flags are also kept for local symbols. */
2132 #define TLS_TLS 1 /* Any TLS reloc. */
2133 #define TLS_GD 2 /* GD reloc. */
2134 #define TLS_LD 4 /* LD reloc. */
2135 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
2136 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
2137 #define TLS_MARK 32 /* __tls_get_addr call marked. */
2138 #define TLS_GDIE 64 /* GOT TPREL reloc resulting from GD->IE. */
2139 unsigned char tls_mask;
2140
2141 /* The above field is also used to mark function symbols. In which
2142 case TLS_TLS will be 0. */
2143 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
2144 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
2145 #define NON_GOT 256 /* local symbol plt, not stored. */
2146
2147 /* Nonzero if we have seen a small data relocation referring to this
2148 symbol. */
2149 unsigned char has_sda_refs : 1;
2150
2151 /* Flag use of given relocations. */
2152 unsigned char has_addr16_ha : 1;
2153 unsigned char has_addr16_lo : 1;
2154 };
2155
2156 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2157
2158 /* PPC ELF linker hash table. */
2159
2160 struct ppc_elf_link_hash_table
2161 {
2162 struct elf_link_hash_table elf;
2163
2164 /* Various options passed from the linker. */
2165 struct ppc_elf_params *params;
2166
2167 /* Short-cuts to get to dynamic linker sections. */
2168 asection *glink;
2169 asection *dynsbss;
2170 asection *relsbss;
2171 elf_linker_section_t sdata[2];
2172 asection *sbss;
2173 asection *glink_eh_frame;
2174 asection *pltlocal;
2175 asection *relpltlocal;
2176
2177 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2178 asection *srelplt2;
2179
2180 /* Shortcut to __tls_get_addr. */
2181 struct elf_link_hash_entry *tls_get_addr;
2182
2183 /* The bfd that forced an old-style PLT. */
2184 bfd *old_bfd;
2185
2186 /* TLS local dynamic got entry handling. */
2187 union {
2188 bfd_signed_vma refcount;
2189 bfd_vma offset;
2190 } tlsld_got;
2191
2192 /* Offset of branch table to PltResolve function in glink. */
2193 bfd_vma glink_pltresolve;
2194
2195 /* Size of reserved GOT entries. */
2196 unsigned int got_header_size;
2197 /* Non-zero if allocating the header left a gap. */
2198 unsigned int got_gap;
2199
2200 /* The type of PLT we have chosen to use. */
2201 enum ppc_elf_plt_type plt_type;
2202
2203 /* True if the target system is VxWorks. */
2204 unsigned int is_vxworks:1;
2205
2206 /* Whether there exist local gnu indirect function resolvers,
2207 referenced by dynamic relocations. */
2208 unsigned int local_ifunc_resolver:1;
2209 unsigned int maybe_local_ifunc_resolver:1;
2210
2211 /* Set if tls optimization is enabled. */
2212 unsigned int do_tls_opt:1;
2213
2214 /* Set if inline plt calls should be converted to direct calls. */
2215 unsigned int can_convert_all_inline_plt:1;
2216
2217 /* The size of PLT entries. */
2218 int plt_entry_size;
2219 /* The distance between adjacent PLT slots. */
2220 int plt_slot_size;
2221 /* The size of the first PLT entry. */
2222 int plt_initial_entry_size;
2223
2224 /* Small local sym cache. */
2225 struct sym_cache sym_cache;
2226 };
2227
2228 /* Rename some of the generic section flags to better document how they
2229 are used for ppc32. The flags are only valid for ppc32 elf objects. */
2230
2231 /* Nonzero if this section has TLS related relocations. */
2232 #define has_tls_reloc sec_flg0
2233
2234 /* Nonzero if this section has a call to __tls_get_addr lacking marker
2235 relocs. */
2236 #define nomark_tls_get_addr sec_flg1
2237
2238 /* Flag set when PLTCALL relocs are detected. */
2239 #define has_pltcall sec_flg2
2240
2241 /* Get the PPC ELF linker hash table from a link_info structure. */
2242
2243 #define ppc_elf_hash_table(p) \
2244 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
2245 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
2246
2247 /* Create an entry in a PPC ELF linker hash table. */
2248
2249 static struct bfd_hash_entry *
2250 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2251 struct bfd_hash_table *table,
2252 const char *string)
2253 {
2254 /* Allocate the structure if it has not already been allocated by a
2255 subclass. */
2256 if (entry == NULL)
2257 {
2258 entry = bfd_hash_allocate (table,
2259 sizeof (struct ppc_elf_link_hash_entry));
2260 if (entry == NULL)
2261 return entry;
2262 }
2263
2264 /* Call the allocation method of the superclass. */
2265 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2266 if (entry != NULL)
2267 {
2268 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2269 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2270 ppc_elf_hash_entry (entry)->tls_mask = 0;
2271 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
2272 }
2273
2274 return entry;
2275 }
2276
2277 /* Create a PPC ELF linker hash table. */
2278
2279 static struct bfd_link_hash_table *
2280 ppc_elf_link_hash_table_create (bfd *abfd)
2281 {
2282 struct ppc_elf_link_hash_table *ret;
2283 static struct ppc_elf_params default_params
2284 = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 };
2285
2286 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2287 if (ret == NULL)
2288 return NULL;
2289
2290 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2291 ppc_elf_link_hash_newfunc,
2292 sizeof (struct ppc_elf_link_hash_entry),
2293 PPC32_ELF_DATA))
2294 {
2295 free (ret);
2296 return NULL;
2297 }
2298
2299 ret->elf.init_plt_refcount.refcount = 0;
2300 ret->elf.init_plt_refcount.glist = NULL;
2301 ret->elf.init_plt_offset.offset = 0;
2302 ret->elf.init_plt_offset.glist = NULL;
2303
2304 ret->params = &default_params;
2305
2306 ret->sdata[0].name = ".sdata";
2307 ret->sdata[0].sym_name = "_SDA_BASE_";
2308 ret->sdata[0].bss_name = ".sbss";
2309
2310 ret->sdata[1].name = ".sdata2";
2311 ret->sdata[1].sym_name = "_SDA2_BASE_";
2312 ret->sdata[1].bss_name = ".sbss2";
2313
2314 ret->plt_entry_size = 12;
2315 ret->plt_slot_size = 8;
2316 ret->plt_initial_entry_size = 72;
2317
2318 return &ret->elf.root;
2319 }
2320
2321 /* Hook linker params into hash table. */
2322
2323 void
2324 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
2325 {
2326 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2327
2328 if (htab)
2329 htab->params = params;
2330 params->pagesize_p2 = bfd_log2 (params->pagesize);
2331 }
2332
2333 /* Create .got and the related sections. */
2334
2335 static bfd_boolean
2336 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2337 {
2338 struct ppc_elf_link_hash_table *htab;
2339
2340 if (!_bfd_elf_create_got_section (abfd, info))
2341 return FALSE;
2342
2343 htab = ppc_elf_hash_table (info);
2344 if (!htab->is_vxworks)
2345 {
2346 /* The powerpc .got has a blrl instruction in it. Mark it
2347 executable. */
2348 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2349 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2350 if (!bfd_set_section_flags (htab->elf.sgot, flags))
2351 return FALSE;
2352 }
2353
2354 return TRUE;
2355 }
2356
2357 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
2358 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
2359 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
2360
2361 static bfd_boolean
2362 ppc_elf_create_linker_section (bfd *abfd,
2363 struct bfd_link_info *info,
2364 flagword flags,
2365 elf_linker_section_t *lsect)
2366 {
2367 asection *s;
2368
2369 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2370 | SEC_LINKER_CREATED);
2371
2372 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
2373 if (s == NULL)
2374 return FALSE;
2375 lsect->section = s;
2376
2377 /* Define the sym on the first section of this name. */
2378 s = bfd_get_section_by_name (abfd, lsect->name);
2379
2380 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
2381 if (lsect->sym == NULL)
2382 return FALSE;
2383 lsect->sym->root.u.def.value = 0x8000;
2384 return TRUE;
2385 }
2386
2387 static bfd_boolean
2388 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2389 {
2390 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2391 asection *s;
2392 flagword flags;
2393 int p2align;
2394
2395 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2396 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2397 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2398 htab->glink = s;
2399 p2align = htab->params->ppc476_workaround ? 6 : 4;
2400 if (p2align < htab->params->plt_stub_align)
2401 p2align = htab->params->plt_stub_align;
2402 if (s == NULL
2403 || !bfd_set_section_alignment (s, p2align))
2404 return FALSE;
2405
2406 if (!info->no_ld_generated_unwind_info)
2407 {
2408 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2409 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2410 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
2411 htab->glink_eh_frame = s;
2412 if (s == NULL
2413 || !bfd_set_section_alignment (s, 2))
2414 return FALSE;
2415 }
2416
2417 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2418 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2419 htab->elf.iplt = s;
2420 if (s == NULL
2421 || !bfd_set_section_alignment (s, 4))
2422 return FALSE;
2423
2424 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2425 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2426 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
2427 htab->elf.irelplt = s;
2428 if (s == NULL
2429 || ! bfd_set_section_alignment (s, 2))
2430 return FALSE;
2431
2432 /* Local plt entries. */
2433 flags = (SEC_ALLOC | SEC_LOAD
2434 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2435 htab->pltlocal = bfd_make_section_anyway_with_flags (abfd, ".branch_lt",
2436 flags);
2437 if (htab->pltlocal == NULL
2438 || !bfd_set_section_alignment (htab->pltlocal, 2))
2439 return FALSE;
2440
2441 if (bfd_link_pic (info))
2442 {
2443 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
2444 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2445 htab->relpltlocal
2446 = bfd_make_section_anyway_with_flags (abfd, ".rela.branch_lt", flags);
2447 if (htab->relpltlocal == NULL
2448 || !bfd_set_section_alignment (htab->relpltlocal, 2))
2449 return FALSE;
2450 }
2451
2452 if (!ppc_elf_create_linker_section (abfd, info, 0,
2453 &htab->sdata[0]))
2454 return FALSE;
2455
2456 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
2457 &htab->sdata[1]))
2458 return FALSE;
2459
2460 return TRUE;
2461 }
2462
2463 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2464 to output sections (just like _bfd_elf_create_dynamic_sections has
2465 to create .dynbss and .rela.bss). */
2466
2467 static bfd_boolean
2468 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2469 {
2470 struct ppc_elf_link_hash_table *htab;
2471 asection *s;
2472 flagword flags;
2473
2474 htab = ppc_elf_hash_table (info);
2475
2476 if (htab->elf.sgot == NULL
2477 && !ppc_elf_create_got (abfd, info))
2478 return FALSE;
2479
2480 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2481 return FALSE;
2482
2483 if (htab->glink == NULL
2484 && !ppc_elf_create_glink (abfd, info))
2485 return FALSE;
2486
2487 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
2488 SEC_ALLOC | SEC_LINKER_CREATED);
2489 htab->dynsbss = s;
2490 if (s == NULL)
2491 return FALSE;
2492
2493 if (! bfd_link_pic (info))
2494 {
2495 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2496 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2497 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
2498 htab->relsbss = s;
2499 if (s == NULL
2500 || !bfd_set_section_alignment (s, 2))
2501 return FALSE;
2502 }
2503
2504 if (htab->is_vxworks
2505 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2506 return FALSE;
2507
2508 s = htab->elf.splt;
2509 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2510 if (htab->plt_type == PLT_VXWORKS)
2511 /* The VxWorks PLT is a loaded section with contents. */
2512 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2513 return bfd_set_section_flags (s, flags);
2514 }
2515
2516 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2517
2518 static void
2519 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2520 struct elf_link_hash_entry *dir,
2521 struct elf_link_hash_entry *ind)
2522 {
2523 struct ppc_elf_link_hash_entry *edir, *eind;
2524
2525 edir = (struct ppc_elf_link_hash_entry *) dir;
2526 eind = (struct ppc_elf_link_hash_entry *) ind;
2527
2528 edir->tls_mask |= eind->tls_mask;
2529 edir->has_sda_refs |= eind->has_sda_refs;
2530
2531 if (edir->elf.versioned != versioned_hidden)
2532 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2533 edir->elf.ref_regular |= eind->elf.ref_regular;
2534 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2535 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2536 edir->elf.needs_plt |= eind->elf.needs_plt;
2537 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2538
2539 /* If we were called to copy over info for a weak sym, that's all. */
2540 if (eind->elf.root.type != bfd_link_hash_indirect)
2541 return;
2542
2543 if (eind->dyn_relocs != NULL)
2544 {
2545 if (edir->dyn_relocs != NULL)
2546 {
2547 struct elf_dyn_relocs **pp;
2548 struct elf_dyn_relocs *p;
2549
2550 /* Add reloc counts against the indirect sym to the direct sym
2551 list. Merge any entries against the same section. */
2552 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2553 {
2554 struct elf_dyn_relocs *q;
2555
2556 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2557 if (q->sec == p->sec)
2558 {
2559 q->pc_count += p->pc_count;
2560 q->count += p->count;
2561 *pp = p->next;
2562 break;
2563 }
2564 if (q == NULL)
2565 pp = &p->next;
2566 }
2567 *pp = edir->dyn_relocs;
2568 }
2569
2570 edir->dyn_relocs = eind->dyn_relocs;
2571 eind->dyn_relocs = NULL;
2572 }
2573
2574 /* Copy over the GOT refcount entries that we may have already seen to
2575 the symbol which just became indirect. */
2576 edir->elf.got.refcount += eind->elf.got.refcount;
2577 eind->elf.got.refcount = 0;
2578
2579 /* And plt entries. */
2580 if (eind->elf.plt.plist != NULL)
2581 {
2582 if (edir->elf.plt.plist != NULL)
2583 {
2584 struct plt_entry **entp;
2585 struct plt_entry *ent;
2586
2587 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2588 {
2589 struct plt_entry *dent;
2590
2591 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2592 if (dent->sec == ent->sec && dent->addend == ent->addend)
2593 {
2594 dent->plt.refcount += ent->plt.refcount;
2595 *entp = ent->next;
2596 break;
2597 }
2598 if (dent == NULL)
2599 entp = &ent->next;
2600 }
2601 *entp = edir->elf.plt.plist;
2602 }
2603
2604 edir->elf.plt.plist = eind->elf.plt.plist;
2605 eind->elf.plt.plist = NULL;
2606 }
2607
2608 if (eind->elf.dynindx != -1)
2609 {
2610 if (edir->elf.dynindx != -1)
2611 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2612 edir->elf.dynstr_index);
2613 edir->elf.dynindx = eind->elf.dynindx;
2614 edir->elf.dynstr_index = eind->elf.dynstr_index;
2615 eind->elf.dynindx = -1;
2616 eind->elf.dynstr_index = 0;
2617 }
2618 }
2619
2620 /* Hook called by the linker routine which adds symbols from an object
2621 file. We use it to put .comm items in .sbss, and not .bss. */
2622
2623 static bfd_boolean
2624 ppc_elf_add_symbol_hook (bfd *abfd,
2625 struct bfd_link_info *info,
2626 Elf_Internal_Sym *sym,
2627 const char **namep ATTRIBUTE_UNUSED,
2628 flagword *flagsp ATTRIBUTE_UNUSED,
2629 asection **secp,
2630 bfd_vma *valp)
2631 {
2632 if (sym->st_shndx == SHN_COMMON
2633 && !bfd_link_relocatable (info)
2634 && is_ppc_elf (info->output_bfd)
2635 && sym->st_size <= elf_gp_size (abfd))
2636 {
2637 /* Common symbols less than or equal to -G nn bytes are automatically
2638 put into .sbss. */
2639 struct ppc_elf_link_hash_table *htab;
2640
2641 htab = ppc_elf_hash_table (info);
2642 if (htab->sbss == NULL)
2643 {
2644 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2645
2646 if (!htab->elf.dynobj)
2647 htab->elf.dynobj = abfd;
2648
2649 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2650 ".sbss",
2651 flags);
2652 if (htab->sbss == NULL)
2653 return FALSE;
2654 }
2655
2656 *secp = htab->sbss;
2657 *valp = sym->st_size;
2658 }
2659
2660 return TRUE;
2661 }
2662
2663 /* Find a linker generated pointer with a given addend and type. */
2665
2666 static elf_linker_section_pointers_t *
2667 elf_find_pointer_linker_section
2668 (elf_linker_section_pointers_t *linker_pointers,
2669 bfd_vma addend,
2670 elf_linker_section_t *lsect)
2671 {
2672 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2673 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2674 return linker_pointers;
2675
2676 return NULL;
2677 }
2678
2679 /* Allocate a pointer to live in a linker created section. */
2680
2681 static bfd_boolean
2682 elf_allocate_pointer_linker_section (bfd *abfd,
2683 elf_linker_section_t *lsect,
2684 struct elf_link_hash_entry *h,
2685 const Elf_Internal_Rela *rel)
2686 {
2687 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2688 elf_linker_section_pointers_t *linker_section_ptr;
2689 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2690 bfd_size_type amt;
2691
2692 BFD_ASSERT (lsect != NULL);
2693
2694 /* Is this a global symbol? */
2695 if (h != NULL)
2696 {
2697 struct ppc_elf_link_hash_entry *eh;
2698
2699 /* Has this symbol already been allocated? If so, our work is done. */
2700 eh = (struct ppc_elf_link_hash_entry *) h;
2701 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2702 rel->r_addend,
2703 lsect))
2704 return TRUE;
2705
2706 ptr_linker_section_ptr = &eh->linker_section_pointer;
2707 }
2708 else
2709 {
2710 BFD_ASSERT (is_ppc_elf (abfd));
2711
2712 /* Allocation of a pointer to a local symbol. */
2713 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2714
2715 /* Allocate a table to hold the local symbols if first time. */
2716 if (!ptr)
2717 {
2718 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
2719
2720 amt = num_symbols;
2721 amt *= sizeof (elf_linker_section_pointers_t *);
2722 ptr = bfd_zalloc (abfd, amt);
2723
2724 if (!ptr)
2725 return FALSE;
2726
2727 elf_local_ptr_offsets (abfd) = ptr;
2728 }
2729
2730 /* Has this symbol already been allocated? If so, our work is done. */
2731 if (elf_find_pointer_linker_section (ptr[r_symndx],
2732 rel->r_addend,
2733 lsect))
2734 return TRUE;
2735
2736 ptr_linker_section_ptr = &ptr[r_symndx];
2737 }
2738
2739 /* Allocate space for a pointer in the linker section, and allocate
2740 a new pointer record from internal memory. */
2741 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2742 amt = sizeof (elf_linker_section_pointers_t);
2743 linker_section_ptr = bfd_alloc (abfd, amt);
2744
2745 if (!linker_section_ptr)
2746 return FALSE;
2747
2748 linker_section_ptr->next = *ptr_linker_section_ptr;
2749 linker_section_ptr->addend = rel->r_addend;
2750 linker_section_ptr->lsect = lsect;
2751 *ptr_linker_section_ptr = linker_section_ptr;
2752
2753 if (!bfd_set_section_alignment (lsect->section, 2))
2754 return FALSE;
2755 linker_section_ptr->offset = lsect->section->size;
2756 lsect->section->size += 4;
2757
2758 #ifdef DEBUG
2759 fprintf (stderr,
2760 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2761 lsect->name, (long) linker_section_ptr->offset,
2762 (long) lsect->section->size);
2763 #endif
2764
2765 return TRUE;
2766 }
2767
2768 static struct plt_entry **
2769 update_local_sym_info (bfd *abfd,
2770 Elf_Internal_Shdr *symtab_hdr,
2771 unsigned long r_symndx,
2772 int tls_type)
2773 {
2774 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2775 struct plt_entry **local_plt;
2776 unsigned char *local_got_tls_masks;
2777
2778 if (local_got_refcounts == NULL)
2779 {
2780 bfd_size_type size = symtab_hdr->sh_info;
2781
2782 size *= (sizeof (*local_got_refcounts)
2783 + sizeof (*local_plt)
2784 + sizeof (*local_got_tls_masks));
2785 local_got_refcounts = bfd_zalloc (abfd, size);
2786 if (local_got_refcounts == NULL)
2787 return NULL;
2788 elf_local_got_refcounts (abfd) = local_got_refcounts;
2789 }
2790
2791 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
2792 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
2793 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
2794 if ((tls_type & NON_GOT) == 0)
2795 local_got_refcounts[r_symndx] += 1;
2796 return local_plt + r_symndx;
2797 }
2798
2799 static bfd_boolean
2800 update_plt_info (bfd *abfd, struct plt_entry **plist,
2801 asection *sec, bfd_vma addend)
2802 {
2803 struct plt_entry *ent;
2804
2805 if (addend < 32768)
2806 sec = NULL;
2807 for (ent = *plist; ent != NULL; ent = ent->next)
2808 if (ent->sec == sec && ent->addend == addend)
2809 break;
2810 if (ent == NULL)
2811 {
2812 bfd_size_type amt = sizeof (*ent);
2813 ent = bfd_alloc (abfd, amt);
2814 if (ent == NULL)
2815 return FALSE;
2816 ent->next = *plist;
2817 ent->sec = sec;
2818 ent->addend = addend;
2819 ent->plt.refcount = 0;
2820 *plist = ent;
2821 }
2822 ent->plt.refcount += 1;
2823 return TRUE;
2824 }
2825
2826 static struct plt_entry *
2827 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
2828 {
2829 struct plt_entry *ent;
2830
2831 if (addend < 32768)
2832 sec = NULL;
2833 for (ent = *plist; ent != NULL; ent = ent->next)
2834 if (ent->sec == sec && ent->addend == addend)
2835 break;
2836 return ent;
2837 }
2838
2839 static bfd_boolean
2840 is_branch_reloc (enum elf_ppc_reloc_type r_type)
2841 {
2842 return (r_type == R_PPC_PLTREL24
2843 || r_type == R_PPC_LOCAL24PC
2844 || r_type == R_PPC_REL24
2845 || r_type == R_PPC_REL14
2846 || r_type == R_PPC_REL14_BRTAKEN
2847 || r_type == R_PPC_REL14_BRNTAKEN
2848 || r_type == R_PPC_ADDR24
2849 || r_type == R_PPC_ADDR14
2850 || r_type == R_PPC_ADDR14_BRTAKEN
2851 || r_type == R_PPC_ADDR14_BRNTAKEN
2852 || r_type == R_PPC_VLE_REL24);
2853 }
2854
2855 /* Relocs on inline plt call sequence insns prior to the call. */
2856
2857 static bfd_boolean
2858 is_plt_seq_reloc (enum elf_ppc_reloc_type r_type)
2859 {
2860 return (r_type == R_PPC_PLT16_HA
2861 || r_type == R_PPC_PLT16_HI
2862 || r_type == R_PPC_PLT16_LO
2863 || r_type == R_PPC_PLTSEQ);
2864 }
2865
2866 static void
2867 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2868 {
2869 _bfd_error_handler
2870 /* xgettext:c-format */
2871 (_("%pB: relocation %s cannot be used when making a shared object"),
2872 abfd,
2873 ppc_elf_howto_table[r_type]->name);
2874 bfd_set_error (bfd_error_bad_value);
2875 }
2876
2877 /* Look through the relocs for a section during the first phase, and
2878 allocate space in the global offset table or procedure linkage
2879 table. */
2880
2881 static bfd_boolean
2882 ppc_elf_check_relocs (bfd *abfd,
2883 struct bfd_link_info *info,
2884 asection *sec,
2885 const Elf_Internal_Rela *relocs)
2886 {
2887 struct ppc_elf_link_hash_table *htab;
2888 Elf_Internal_Shdr *symtab_hdr;
2889 struct elf_link_hash_entry **sym_hashes;
2890 const Elf_Internal_Rela *rel;
2891 const Elf_Internal_Rela *rel_end;
2892 asection *got2, *sreloc;
2893 struct elf_link_hash_entry *tga;
2894
2895 if (bfd_link_relocatable (info))
2896 return TRUE;
2897
2898 /* Don't do anything special with non-loaded, non-alloced sections.
2899 In particular, any relocs in such sections should not affect GOT
2900 and PLT reference counting (ie. we don't allow them to create GOT
2901 or PLT entries), there's no possibility or desire to optimize TLS
2902 relocs, and there's not much point in propagating relocs to shared
2903 libs that the dynamic linker won't relocate. */
2904 if ((sec->flags & SEC_ALLOC) == 0)
2905 return TRUE;
2906
2907 #ifdef DEBUG
2908 _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB",
2909 sec, abfd);
2910 #endif
2911
2912 BFD_ASSERT (is_ppc_elf (abfd));
2913
2914 /* Initialize howto table if not already done. */
2915 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2916 ppc_elf_howto_init ();
2917
2918 htab = ppc_elf_hash_table (info);
2919 if (htab->glink == NULL)
2920 {
2921 if (htab->elf.dynobj == NULL)
2922 htab->elf.dynobj = abfd;
2923 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
2924 return FALSE;
2925 }
2926 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
2927 FALSE, FALSE, TRUE);
2928 symtab_hdr = &elf_symtab_hdr (abfd);
2929 sym_hashes = elf_sym_hashes (abfd);
2930 got2 = bfd_get_section_by_name (abfd, ".got2");
2931 sreloc = NULL;
2932
2933 rel_end = relocs + sec->reloc_count;
2934 for (rel = relocs; rel < rel_end; rel++)
2935 {
2936 unsigned long r_symndx;
2937 enum elf_ppc_reloc_type r_type;
2938 struct elf_link_hash_entry *h;
2939 int tls_type;
2940 struct plt_entry **ifunc;
2941 struct plt_entry **pltent;
2942 bfd_vma addend;
2943
2944 r_symndx = ELF32_R_SYM (rel->r_info);
2945 if (r_symndx < symtab_hdr->sh_info)
2946 h = NULL;
2947 else
2948 {
2949 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2950 while (h->root.type == bfd_link_hash_indirect
2951 || h->root.type == bfd_link_hash_warning)
2952 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2953 }
2954
2955 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2956 This shows up in particular in an R_PPC_ADDR32 in the eabi
2957 startup code. */
2958 if (h != NULL
2959 && htab->elf.sgot == NULL
2960 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2961 {
2962 if (htab->elf.dynobj == NULL)
2963 htab->elf.dynobj = abfd;
2964 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2965 return FALSE;
2966 BFD_ASSERT (h == htab->elf.hgot);
2967 }
2968
2969 tls_type = 0;
2970 r_type = ELF32_R_TYPE (rel->r_info);
2971 ifunc = NULL;
2972 if (h == NULL && !htab->is_vxworks)
2973 {
2974 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2975 abfd, r_symndx);
2976 if (isym == NULL)
2977 return FALSE;
2978
2979 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2980 {
2981 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
2982 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
2983 NON_GOT | PLT_IFUNC);
2984 if (ifunc == NULL)
2985 return FALSE;
2986
2987 /* STT_GNU_IFUNC symbols must have a PLT entry;
2988 In a non-pie executable even when there are
2989 no plt calls. */
2990 if (!bfd_link_pic (info)
2991 || is_branch_reloc (r_type)
2992 || r_type == R_PPC_PLT16_LO
2993 || r_type == R_PPC_PLT16_HI
2994 || r_type == R_PPC_PLT16_HA)
2995 {
2996 addend = 0;
2997 if (r_type == R_PPC_PLTREL24)
2998 ppc_elf_tdata (abfd)->makes_plt_call = 1;
2999 if (bfd_link_pic (info)
3000 && (r_type == R_PPC_PLTREL24
3001 || r_type == R_PPC_PLT16_LO
3002 || r_type == R_PPC_PLT16_HI
3003 || r_type == R_PPC_PLT16_HA))
3004 addend = rel->r_addend;
3005 if (!update_plt_info (abfd, ifunc, got2, addend))
3006 return FALSE;
3007 }
3008 }
3009 }
3010
3011 if (!htab->is_vxworks
3012 && is_branch_reloc (r_type)
3013 && h != NULL
3014 && h == tga)
3015 {
3016 if (rel != relocs
3017 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3018 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3019 /* We have a new-style __tls_get_addr call with a marker
3020 reloc. */
3021 ;
3022 else
3023 /* Mark this section as having an old-style call. */
3024 sec->nomark_tls_get_addr = 1;
3025 }
3026
3027 switch ((int)r_type)
3028 {
3029 case R_PPC_TLSGD:
3030 case R_PPC_TLSLD:
3031 /* These special tls relocs tie a call to __tls_get_addr with
3032 its parameter symbol. */
3033 if (h != NULL)
3034 ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK;
3035 else
3036 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3037 NON_GOT | TLS_TLS | TLS_MARK))
3038 return FALSE;
3039 break;
3040
3041 case R_PPC_PLTSEQ:
3042 break;
3043
3044 case R_PPC_GOT_TLSLD16:
3045 case R_PPC_GOT_TLSLD16_LO:
3046 case R_PPC_GOT_TLSLD16_HI:
3047 case R_PPC_GOT_TLSLD16_HA:
3048 tls_type = TLS_TLS | TLS_LD;
3049 goto dogottls;
3050
3051 case R_PPC_GOT_TLSGD16:
3052 case R_PPC_GOT_TLSGD16_LO:
3053 case R_PPC_GOT_TLSGD16_HI:
3054 case R_PPC_GOT_TLSGD16_HA:
3055 tls_type = TLS_TLS | TLS_GD;
3056 goto dogottls;
3057
3058 case R_PPC_GOT_TPREL16:
3059 case R_PPC_GOT_TPREL16_LO:
3060 case R_PPC_GOT_TPREL16_HI:
3061 case R_PPC_GOT_TPREL16_HA:
3062 if (bfd_link_dll (info))
3063 info->flags |= DF_STATIC_TLS;
3064 tls_type = TLS_TLS | TLS_TPREL;
3065 goto dogottls;
3066
3067 case R_PPC_GOT_DTPREL16:
3068 case R_PPC_GOT_DTPREL16_LO:
3069 case R_PPC_GOT_DTPREL16_HI:
3070 case R_PPC_GOT_DTPREL16_HA:
3071 tls_type = TLS_TLS | TLS_DTPREL;
3072 dogottls:
3073 sec->has_tls_reloc = 1;
3074 /* Fall through. */
3075
3076 /* GOT16 relocations */
3077 case R_PPC_GOT16:
3078 case R_PPC_GOT16_LO:
3079 case R_PPC_GOT16_HI:
3080 case R_PPC_GOT16_HA:
3081 /* This symbol requires a global offset table entry. */
3082 if (htab->elf.sgot == NULL)
3083 {
3084 if (htab->elf.dynobj == NULL)
3085 htab->elf.dynobj = abfd;
3086 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3087 return FALSE;
3088 }
3089 if (h != NULL)
3090 {
3091 h->got.refcount += 1;
3092 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3093 }
3094 else
3095 /* This is a global offset table entry for a local symbol. */
3096 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3097 return FALSE;
3098
3099 /* We may also need a plt entry if the symbol turns out to be
3100 an ifunc. */
3101 if (h != NULL && !bfd_link_pic (info))
3102 {
3103 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3104 return FALSE;
3105 }
3106 break;
3107
3108 /* Indirect .sdata relocation. */
3109 case R_PPC_EMB_SDAI16:
3110 htab->sdata[0].sym->ref_regular = 1;
3111 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
3112 h, rel))
3113 return FALSE;
3114 if (h != NULL)
3115 {
3116 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3117 h->non_got_ref = TRUE;
3118 }
3119 break;
3120
3121 /* Indirect .sdata2 relocation. */
3122 case R_PPC_EMB_SDA2I16:
3123 if (!bfd_link_executable (info))
3124 {
3125 bad_shared_reloc (abfd, r_type);
3126 return FALSE;
3127 }
3128 htab->sdata[1].sym->ref_regular = 1;
3129 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
3130 h, rel))
3131 return FALSE;
3132 if (h != NULL)
3133 {
3134 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3135 h->non_got_ref = TRUE;
3136 }
3137 break;
3138
3139 case R_PPC_SDAREL16:
3140 htab->sdata[0].sym->ref_regular = 1;
3141 /* Fall through. */
3142
3143 case R_PPC_VLE_SDAREL_LO16A:
3144 case R_PPC_VLE_SDAREL_LO16D:
3145 case R_PPC_VLE_SDAREL_HI16A:
3146 case R_PPC_VLE_SDAREL_HI16D:
3147 case R_PPC_VLE_SDAREL_HA16A:
3148 case R_PPC_VLE_SDAREL_HA16D:
3149 if (h != NULL)
3150 {
3151 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3152 h->non_got_ref = TRUE;
3153 }
3154 break;
3155
3156 case R_PPC_VLE_REL8:
3157 case R_PPC_VLE_REL15:
3158 case R_PPC_VLE_REL24:
3159 case R_PPC_VLE_LO16A:
3160 case R_PPC_VLE_LO16D:
3161 case R_PPC_VLE_HI16A:
3162 case R_PPC_VLE_HI16D:
3163 case R_PPC_VLE_HA16A:
3164 case R_PPC_VLE_HA16D:
3165 case R_PPC_VLE_ADDR20:
3166 break;
3167
3168 case R_PPC_EMB_SDA2REL:
3169 if (!bfd_link_executable (info))
3170 {
3171 bad_shared_reloc (abfd, r_type);
3172 return FALSE;
3173 }
3174 htab->sdata[1].sym->ref_regular = 1;
3175 if (h != NULL)
3176 {
3177 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3178 h->non_got_ref = TRUE;
3179 }
3180 break;
3181
3182 case R_PPC_VLE_SDA21_LO:
3183 case R_PPC_VLE_SDA21:
3184 case R_PPC_EMB_SDA21:
3185 case R_PPC_EMB_RELSDA:
3186 if (h != NULL)
3187 {
3188 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3189 h->non_got_ref = TRUE;
3190 }
3191 break;
3192
3193 case R_PPC_EMB_NADDR32:
3194 case R_PPC_EMB_NADDR16:
3195 case R_PPC_EMB_NADDR16_LO:
3196 case R_PPC_EMB_NADDR16_HI:
3197 case R_PPC_EMB_NADDR16_HA:
3198 if (h != NULL)
3199 h->non_got_ref = TRUE;
3200 break;
3201
3202 case R_PPC_PLTREL24:
3203 if (h == NULL)
3204 break;
3205 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3206 goto pltentry;
3207
3208 case R_PPC_PLTCALL:
3209 sec->has_pltcall = 1;
3210 /* Fall through. */
3211
3212 case R_PPC_PLT32:
3213 case R_PPC_PLTREL32:
3214 case R_PPC_PLT16_LO:
3215 case R_PPC_PLT16_HI:
3216 case R_PPC_PLT16_HA:
3217 pltentry:
3218 #ifdef DEBUG
3219 fprintf (stderr, "Reloc requires a PLT entry\n");
3220 #endif
3221 /* This symbol requires a procedure linkage table entry. */
3222 if (h == NULL)
3223 {
3224 pltent = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3225 NON_GOT | PLT_KEEP);
3226 if (pltent == NULL)
3227 return FALSE;
3228 }
3229 else
3230 {
3231 if (r_type != R_PPC_PLTREL24)
3232 ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP;
3233 h->needs_plt = 1;
3234 pltent = &h->plt.plist;
3235 }
3236 addend = 0;
3237 if (bfd_link_pic (info)
3238 && (r_type == R_PPC_PLTREL24
3239 || r_type == R_PPC_PLT16_LO
3240 || r_type == R_PPC_PLT16_HI
3241 || r_type == R_PPC_PLT16_HA))
3242 addend = rel->r_addend;
3243 if (!update_plt_info (abfd, pltent, got2, addend))
3244 return FALSE;
3245 break;
3246
3247 /* The following relocations don't need to propagate the
3248 relocation if linking a shared object since they are
3249 section relative. */
3250 case R_PPC_SECTOFF:
3251 case R_PPC_SECTOFF_LO:
3252 case R_PPC_SECTOFF_HI:
3253 case R_PPC_SECTOFF_HA:
3254 case R_PPC_DTPREL16:
3255 case R_PPC_DTPREL16_LO:
3256 case R_PPC_DTPREL16_HI:
3257 case R_PPC_DTPREL16_HA:
3258 case R_PPC_TOC16:
3259 break;
3260
3261 case R_PPC_REL16:
3262 case R_PPC_REL16_LO:
3263 case R_PPC_REL16_HI:
3264 case R_PPC_REL16_HA:
3265 case R_PPC_REL16DX_HA:
3266 ppc_elf_tdata (abfd)->has_rel16 = 1;
3267 break;
3268
3269 /* These are just markers. */
3270 case R_PPC_TLS:
3271 case R_PPC_EMB_MRKREF:
3272 case R_PPC_NONE:
3273 case R_PPC_max:
3274 case R_PPC_RELAX:
3275 case R_PPC_RELAX_PLT:
3276 case R_PPC_RELAX_PLTREL24:
3277 case R_PPC_16DX_HA:
3278 break;
3279
3280 /* These should only appear in dynamic objects. */
3281 case R_PPC_COPY:
3282 case R_PPC_GLOB_DAT:
3283 case R_PPC_JMP_SLOT:
3284 case R_PPC_RELATIVE:
3285 case R_PPC_IRELATIVE:
3286 break;
3287
3288 /* These aren't handled yet. We'll report an error later. */
3289 case R_PPC_ADDR30:
3290 case R_PPC_EMB_RELSEC16:
3291 case R_PPC_EMB_RELST_LO:
3292 case R_PPC_EMB_RELST_HI:
3293 case R_PPC_EMB_RELST_HA:
3294 case R_PPC_EMB_BIT_FLD:
3295 break;
3296
3297 /* This refers only to functions defined in the shared library. */
3298 case R_PPC_LOCAL24PC:
3299 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3300 {
3301 htab->plt_type = PLT_OLD;
3302 htab->old_bfd = abfd;
3303 }
3304 if (h != NULL && h->type == STT_GNU_IFUNC)
3305 {
3306 h->needs_plt = 1;
3307 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3308 return FALSE;
3309 }
3310 break;
3311
3312 /* This relocation describes the C++ object vtable hierarchy.
3313 Reconstruct it for later use during GC. */
3314 case R_PPC_GNU_VTINHERIT:
3315 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3316 return FALSE;
3317 break;
3318
3319 /* This relocation describes which C++ vtable entries are actually
3320 used. Record for later use during GC. */
3321 case R_PPC_GNU_VTENTRY:
3322 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3323 return FALSE;
3324 break;
3325
3326 /* We shouldn't really be seeing TPREL32. */
3327 case R_PPC_TPREL32:
3328 case R_PPC_TPREL16:
3329 case R_PPC_TPREL16_LO:
3330 case R_PPC_TPREL16_HI:
3331 case R_PPC_TPREL16_HA:
3332 if (bfd_link_dll (info))
3333 info->flags |= DF_STATIC_TLS;
3334 goto dodyn;
3335
3336 /* Nor these. */
3337 case R_PPC_DTPMOD32:
3338 case R_PPC_DTPREL32:
3339 goto dodyn;
3340
3341 case R_PPC_REL32:
3342 if (h == NULL
3343 && got2 != NULL
3344 && (sec->flags & SEC_CODE) != 0
3345 && bfd_link_pic (info)
3346 && htab->plt_type == PLT_UNSET)
3347 {
3348 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3349 the start of a function, which assembles to a REL32
3350 reference to .got2. If we detect one of these, then
3351 force the old PLT layout because the linker cannot
3352 reliably deduce the GOT pointer value needed for
3353 PLT call stubs. */
3354 asection *s;
3355 Elf_Internal_Sym *isym;
3356
3357 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3358 abfd, r_symndx);
3359 if (isym == NULL)
3360 return FALSE;
3361
3362 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3363 if (s == got2)
3364 {
3365 htab->plt_type = PLT_OLD;
3366 htab->old_bfd = abfd;
3367 }
3368 }
3369 if (h == NULL || h == htab->elf.hgot)
3370 break;
3371 /* fall through */
3372
3373 case R_PPC_ADDR32:
3374 case R_PPC_ADDR16:
3375 case R_PPC_ADDR16_LO:
3376 case R_PPC_ADDR16_HI:
3377 case R_PPC_ADDR16_HA:
3378 case R_PPC_UADDR32:
3379 case R_PPC_UADDR16:
3380 if (h != NULL && !bfd_link_pic (info))
3381 {
3382 /* We may need a plt entry if the symbol turns out to be
3383 a function defined in a dynamic object. */
3384 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3385 return FALSE;
3386
3387 /* We may need a copy reloc too. */
3388 h->non_got_ref = 1;
3389 h->pointer_equality_needed = 1;
3390 if (r_type == R_PPC_ADDR16_HA)
3391 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
3392 if (r_type == R_PPC_ADDR16_LO)
3393 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
3394 }
3395 goto dodyn;
3396
3397 case R_PPC_REL24:
3398 case R_PPC_REL14:
3399 case R_PPC_REL14_BRTAKEN:
3400 case R_PPC_REL14_BRNTAKEN:
3401 if (h == NULL)
3402 break;
3403 if (h == htab->elf.hgot)
3404 {
3405 if (htab->plt_type == PLT_UNSET)
3406 {
3407 htab->plt_type = PLT_OLD;
3408 htab->old_bfd = abfd;
3409 }
3410 break;
3411 }
3412 /* fall through */
3413
3414 case R_PPC_ADDR24:
3415 case R_PPC_ADDR14:
3416 case R_PPC_ADDR14_BRTAKEN:
3417 case R_PPC_ADDR14_BRNTAKEN:
3418 if (h != NULL && !bfd_link_pic (info))
3419 {
3420 /* We may need a plt entry if the symbol turns out to be
3421 a function defined in a dynamic object. */
3422 h->needs_plt = 1;
3423 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3424 return FALSE;
3425 break;
3426 }
3427
3428 dodyn:
3429 /* If we are creating a shared library, and this is a reloc
3430 against a global symbol, or a non PC relative reloc
3431 against a local symbol, then we need to copy the reloc
3432 into the shared library. However, if we are linking with
3433 -Bsymbolic, we do not need to copy a reloc against a
3434 global symbol which is defined in an object we are
3435 including in the link (i.e., DEF_REGULAR is set). At
3436 this point we have not seen all the input files, so it is
3437 possible that DEF_REGULAR is not set now but will be set
3438 later (it is never cleared). In case of a weak definition,
3439 DEF_REGULAR may be cleared later by a strong definition in
3440 a shared library. We account for that possibility below by
3441 storing information in the dyn_relocs field of the hash
3442 table entry. A similar situation occurs when creating
3443 shared libraries and symbol visibility changes render the
3444 symbol local.
3445
3446 If on the other hand, we are creating an executable, we
3447 may need to keep relocations for symbols satisfied by a
3448 dynamic library if we manage to avoid copy relocs for the
3449 symbol. */
3450 if ((bfd_link_pic (info)
3451 && (must_be_dyn_reloc (info, r_type)
3452 || (h != NULL
3453 && (!SYMBOLIC_BIND (info, h)
3454 || h->root.type == bfd_link_hash_defweak
3455 || !h->def_regular))))
3456 || (ELIMINATE_COPY_RELOCS
3457 && !bfd_link_pic (info)
3458 && h != NULL
3459 && (h->root.type == bfd_link_hash_defweak
3460 || !h->def_regular)))
3461 {
3462 #ifdef DEBUG
3463 fprintf (stderr,
3464 "ppc_elf_check_relocs needs to "
3465 "create relocation for %s\n",
3466 (h && h->root.root.string
3467 ? h->root.root.string : "<unknown>"));
3468 #endif
3469 if (sreloc == NULL)
3470 {
3471 if (htab->elf.dynobj == NULL)
3472 htab->elf.dynobj = abfd;
3473
3474 sreloc = _bfd_elf_make_dynamic_reloc_section
3475 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3476
3477 if (sreloc == NULL)
3478 return FALSE;
3479 }
3480
3481 /* If this is a global symbol, we count the number of
3482 relocations we need for this symbol. */
3483 if (h != NULL)
3484 {
3485 struct elf_dyn_relocs *p;
3486 struct elf_dyn_relocs **rel_head;
3487
3488 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
3489 p = *rel_head;
3490 if (p == NULL || p->sec != sec)
3491 {
3492 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3493 if (p == NULL)
3494 return FALSE;
3495 p->next = *rel_head;
3496 *rel_head = p;
3497 p->sec = sec;
3498 p->count = 0;
3499 p->pc_count = 0;
3500 }
3501 p->count += 1;
3502 if (!must_be_dyn_reloc (info, r_type))
3503 p->pc_count += 1;
3504 }
3505 else
3506 {
3507 /* Track dynamic relocs needed for local syms too.
3508 We really need local syms available to do this
3509 easily. Oh well. */
3510 struct ppc_dyn_relocs *p;
3511 struct ppc_dyn_relocs **rel_head;
3512 bfd_boolean is_ifunc;
3513 asection *s;
3514 void *vpp;
3515 Elf_Internal_Sym *isym;
3516
3517 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3518 abfd, r_symndx);
3519 if (isym == NULL)
3520 return FALSE;
3521
3522 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3523 if (s == NULL)
3524 s = sec;
3525
3526 vpp = &elf_section_data (s)->local_dynrel;
3527 rel_head = (struct ppc_dyn_relocs **) vpp;
3528 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
3529 p = *rel_head;
3530 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
3531 p = p->next;
3532 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
3533 {
3534 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3535 if (p == NULL)
3536 return FALSE;
3537 p->next = *rel_head;
3538 *rel_head = p;
3539 p->sec = sec;
3540 p->ifunc = is_ifunc;
3541 p->count = 0;
3542 }
3543 p->count += 1;
3544 }
3545 }
3546
3547 break;
3548 }
3549 }
3550
3551 return TRUE;
3552 }
3553
3554 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
3556 and OBFD, and merge non-conflicting ones. */
3557 bfd_boolean
3558 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
3559 {
3560 bfd *obfd = info->output_bfd;
3561 obj_attribute *in_attr, *in_attrs;
3562 obj_attribute *out_attr, *out_attrs;
3563 bfd_boolean ret = TRUE;
3564
3565 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3566 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3567
3568 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3569 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3570
3571 if (in_attr->i != out_attr->i)
3572 {
3573 int in_fp = in_attr->i & 3;
3574 int out_fp = out_attr->i & 3;
3575 static bfd *last_fp, *last_ld;
3576
3577 if (in_fp == 0)
3578 ;
3579 else if (out_fp == 0)
3580 {
3581 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3582 out_attr->i ^= in_fp;
3583 last_fp = ibfd;
3584 }
3585 else if (out_fp != 2 && in_fp == 2)
3586 {
3587 _bfd_error_handler
3588 /* xgettext:c-format */
3589 (_("%pB uses hard float, %pB uses soft float"),
3590 last_fp, ibfd);
3591 ret = FALSE;
3592 }
3593 else if (out_fp == 2 && in_fp != 2)
3594 {
3595 _bfd_error_handler
3596 /* xgettext:c-format */
3597 (_("%pB uses hard float, %pB uses soft float"),
3598 ibfd, last_fp);
3599 ret = FALSE;
3600 }
3601 else if (out_fp == 1 && in_fp == 3)
3602 {
3603 _bfd_error_handler
3604 /* xgettext:c-format */
3605 (_("%pB uses double-precision hard float, "
3606 "%pB uses single-precision hard float"), last_fp, ibfd);
3607 ret = FALSE;
3608 }
3609 else if (out_fp == 3 && in_fp == 1)
3610 {
3611 _bfd_error_handler
3612 /* xgettext:c-format */
3613 (_("%pB uses double-precision hard float, "
3614 "%pB uses single-precision hard float"), ibfd, last_fp);
3615 ret = FALSE;
3616 }
3617
3618 in_fp = in_attr->i & 0xc;
3619 out_fp = out_attr->i & 0xc;
3620 if (in_fp == 0)
3621 ;
3622 else if (out_fp == 0)
3623 {
3624 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3625 out_attr->i ^= in_fp;
3626 last_ld = ibfd;
3627 }
3628 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
3629 {
3630 _bfd_error_handler
3631 /* xgettext:c-format */
3632 (_("%pB uses 64-bit long double, "
3633 "%pB uses 128-bit long double"), ibfd, last_ld);
3634 ret = FALSE;
3635 }
3636 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
3637 {
3638 _bfd_error_handler
3639 /* xgettext:c-format */
3640 (_("%pB uses 64-bit long double, "
3641 "%pB uses 128-bit long double"), last_ld, ibfd);
3642 ret = FALSE;
3643 }
3644 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
3645 {
3646 _bfd_error_handler
3647 /* xgettext:c-format */
3648 (_("%pB uses IBM long double, "
3649 "%pB uses IEEE long double"), last_ld, ibfd);
3650 ret = FALSE;
3651 }
3652 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
3653 {
3654 _bfd_error_handler
3655 /* xgettext:c-format */
3656 (_("%pB uses IBM long double, "
3657 "%pB uses IEEE long double"), ibfd, last_ld);
3658 ret = FALSE;
3659 }
3660 }
3661
3662 if (!ret)
3663 {
3664 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3665 bfd_set_error (bfd_error_bad_value);
3666 }
3667 return ret;
3668 }
3669
3670 /* Merge object attributes from IBFD into OBFD. Warn if
3671 there are conflicting attributes. */
3672 static bfd_boolean
3673 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
3674 {
3675 bfd *obfd;
3676 obj_attribute *in_attr, *in_attrs;
3677 obj_attribute *out_attr, *out_attrs;
3678 bfd_boolean ret;
3679
3680 if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info))
3681 return FALSE;
3682
3683 obfd = info->output_bfd;
3684 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3685 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3686
3687 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3688 merge non-conflicting ones. */
3689 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3690 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3691 ret = TRUE;
3692 if (in_attr->i != out_attr->i)
3693 {
3694 int in_vec = in_attr->i & 3;
3695 int out_vec = out_attr->i & 3;
3696 static bfd *last_vec;
3697
3698 if (in_vec == 0)
3699 ;
3700 else if (out_vec == 0)
3701 {
3702 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3703 out_attr->i = in_vec;
3704 last_vec = ibfd;
3705 }
3706 /* For now, allow generic to transition to AltiVec or SPE
3707 without a warning. If GCC marked files with their stack
3708 alignment and used don't-care markings for files which are
3709 not affected by the vector ABI, we could warn about this
3710 case too. */
3711 else if (in_vec == 1)
3712 ;
3713 else if (out_vec == 1)
3714 {
3715 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3716 out_attr->i = in_vec;
3717 last_vec = ibfd;
3718 }
3719 else if (out_vec < in_vec)
3720 {
3721 _bfd_error_handler
3722 /* xgettext:c-format */
3723 (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
3724 last_vec, ibfd);
3725 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3726 ret = FALSE;
3727 }
3728 else if (out_vec > in_vec)
3729 {
3730 _bfd_error_handler
3731 /* xgettext:c-format */
3732 (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
3733 ibfd, last_vec);
3734 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3735 ret = FALSE;
3736 }
3737 }
3738
3739 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
3740 and merge non-conflicting ones. */
3741 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
3742 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
3743 if (in_attr->i != out_attr->i)
3744 {
3745 int in_struct = in_attr->i & 3;
3746 int out_struct = out_attr->i & 3;
3747 static bfd *last_struct;
3748
3749 if (in_struct == 0 || in_struct == 3)
3750 ;
3751 else if (out_struct == 0)
3752 {
3753 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
3754 out_attr->i = in_struct;
3755 last_struct = ibfd;
3756 }
3757 else if (out_struct < in_struct)
3758 {
3759 _bfd_error_handler
3760 /* xgettext:c-format */
3761 (_("%pB uses r3/r4 for small structure returns, "
3762 "%pB uses memory"), last_struct, ibfd);
3763 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3764 ret = FALSE;
3765 }
3766 else if (out_struct > in_struct)
3767 {
3768 _bfd_error_handler
3769 /* xgettext:c-format */
3770 (_("%pB uses r3/r4 for small structure returns, "
3771 "%pB uses memory"), ibfd, last_struct);
3772 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
3773 ret = FALSE;
3774 }
3775 }
3776 if (!ret)
3777 {
3778 bfd_set_error (bfd_error_bad_value);
3779 return FALSE;
3780 }
3781
3782 /* Merge Tag_compatibility attributes and any common GNU ones. */
3783 return _bfd_elf_merge_object_attributes (ibfd, info);
3784 }
3785
3786 /* Merge backend specific data from an object file to the output
3787 object file when linking. */
3788
3789 static bfd_boolean
3790 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3791 {
3792 bfd *obfd = info->output_bfd;
3793 flagword old_flags;
3794 flagword new_flags;
3795 bfd_boolean error;
3796
3797 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3798 return TRUE;
3799
3800 /* Check if we have the same endianness. */
3801 if (! _bfd_generic_verify_endian_match (ibfd, info))
3802 return FALSE;
3803
3804 if (!ppc_elf_merge_obj_attributes (ibfd, info))
3805 return FALSE;
3806
3807 new_flags = elf_elfheader (ibfd)->e_flags;
3808 old_flags = elf_elfheader (obfd)->e_flags;
3809 if (!elf_flags_init (obfd))
3810 {
3811 /* First call, no flags set. */
3812 elf_flags_init (obfd) = TRUE;
3813 elf_elfheader (obfd)->e_flags = new_flags;
3814 }
3815
3816 /* Compatible flags are ok. */
3817 else if (new_flags == old_flags)
3818 ;
3819
3820 /* Incompatible flags. */
3821 else
3822 {
3823 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3824 to be linked with either. */
3825 error = FALSE;
3826 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3827 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3828 {
3829 error = TRUE;
3830 _bfd_error_handler
3831 (_("%pB: compiled with -mrelocatable and linked with "
3832 "modules compiled normally"), ibfd);
3833 }
3834 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3835 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3836 {
3837 error = TRUE;
3838 _bfd_error_handler
3839 (_("%pB: compiled normally and linked with "
3840 "modules compiled with -mrelocatable"), ibfd);
3841 }
3842
3843 /* The output is -mrelocatable-lib iff both the input files are. */
3844 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3845 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3846
3847 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3848 but each input file is either -mrelocatable or -mrelocatable-lib. */
3849 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3850 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3851 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3852 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3853
3854 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3855 any module uses it. */
3856 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3857
3858 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3859 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3860
3861 /* Warn about any other mismatches. */
3862 if (new_flags != old_flags)
3863 {
3864 error = TRUE;
3865 _bfd_error_handler
3866 /* xgettext:c-format */
3867 (_("%pB: uses different e_flags (%#x) fields "
3868 "than previous modules (%#x)"),
3869 ibfd, new_flags, old_flags);
3870 }
3871
3872 if (error)
3873 {
3874 bfd_set_error (bfd_error_bad_value);
3875 return FALSE;
3876 }
3877 }
3878
3879 return TRUE;
3880 }
3881
3882 static void
3883 ppc_elf_vle_split16 (bfd *input_bfd,
3884 asection *input_section,
3885 unsigned long offset,
3886 bfd_byte *loc,
3887 bfd_vma value,
3888 split16_format_type split16_format,
3889 bfd_boolean fixup)
3890 {
3891 unsigned int insn, opcode;
3892
3893 insn = bfd_get_32 (input_bfd, loc);
3894 opcode = insn & E_OPCODE_MASK;
3895 if (opcode == E_OR2I_INSN
3896 || opcode == E_AND2I_DOT_INSN
3897 || opcode == E_OR2IS_INSN
3898 || opcode == E_LIS_INSN
3899 || opcode == E_AND2IS_DOT_INSN)
3900 {
3901 if (split16_format != split16a_type)
3902 {
3903 if (fixup)
3904 split16_format = split16a_type;
3905 else
3906 _bfd_error_handler
3907 /* xgettext:c-format */
3908 (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"),
3909 input_bfd, input_section, offset, opcode);
3910 }
3911 }
3912 else if (opcode == E_ADD2I_DOT_INSN
3913 || opcode == E_ADD2IS_INSN
3914 || opcode == E_CMP16I_INSN
3915 || opcode == E_MULL2I_INSN
3916 || opcode == E_CMPL16I_INSN
3917 || opcode == E_CMPH16I_INSN
3918 || opcode == E_CMPHL16I_INSN)
3919 {
3920 if (split16_format != split16d_type)
3921 {
3922 if (fixup)
3923 split16_format = split16d_type;
3924 else
3925 _bfd_error_handler
3926 /* xgettext:c-format */
3927 (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"),
3928 input_bfd, input_section, offset, opcode);
3929 }
3930 }
3931 if (split16_format == split16a_type)
3932 {
3933 insn &= ~((0xf800 << 5) | 0x7ff);
3934 insn |= (value & 0xf800) << 5;
3935 if ((insn & E_LI_MASK) == E_LI_INSN)
3936 {
3937 /* Hack for e_li. Extend sign. */
3938 insn &= ~(0xf0000 >> 5);
3939 insn |= (-(value & 0x8000) & 0xf0000) >> 5;
3940 }
3941 }
3942 else
3943 {
3944 insn &= ~((0xf800 << 10) | 0x7ff);
3945 insn |= (value & 0xf800) << 10;
3946 }
3947 insn |= value & 0x7ff;
3948 bfd_put_32 (input_bfd, insn, loc);
3949 }
3950
3951 static void
3952 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
3953 {
3954 unsigned int insn;
3955
3956 insn = bfd_get_32 (output_bfd, loc);
3957 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
3958 /* Top 4 bits of value to 17..20. */
3959 insn |= (value & 0xf0000) >> 5;
3960 /* Next 5 bits of the value to 11..15. */
3961 insn |= (value & 0xf800) << 5;
3962 /* And the final 11 bits of the value to bits 21 to 31. */
3963 insn |= value & 0x7ff;
3964 bfd_put_32 (output_bfd, insn, loc);
3965 }
3966
3967
3968 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3970 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3971 int
3972 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3973 struct bfd_link_info *info)
3974 {
3975 struct ppc_elf_link_hash_table *htab;
3976 flagword flags;
3977
3978 htab = ppc_elf_hash_table (info);
3979
3980 if (htab->plt_type == PLT_UNSET)
3981 {
3982 struct elf_link_hash_entry *h;
3983
3984 if (htab->params->plt_style == PLT_OLD)
3985 htab->plt_type = PLT_OLD;
3986 else if (bfd_link_pic (info)
3987 && htab->elf.dynamic_sections_created
3988 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
3989 FALSE, FALSE, TRUE)) != NULL
3990 && (h->type == STT_FUNC
3991 || h->needs_plt)
3992 && h->ref_regular
3993 && !(SYMBOL_CALLS_LOCAL (info, h)
3994 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
3995 {
3996 /* Profiling of shared libs (and pies) is not supported with
3997 secure plt, because ppc32 does profiling before a
3998 function prologue and a secure plt pic call stubs needs
3999 r30 to be set up. */
4000 htab->plt_type = PLT_OLD;
4001 }
4002 else
4003 {
4004 bfd *ibfd;
4005 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4006
4007 /* Look through the reloc flags left by ppc_elf_check_relocs.
4008 Use the old style bss plt if a file makes plt calls
4009 without using the new relocs, and if ld isn't given
4010 --secure-plt and we never see REL16 relocs. */
4011 if (plt_type == PLT_UNSET)
4012 plt_type = PLT_OLD;
4013 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4014 if (is_ppc_elf (ibfd))
4015 {
4016 if (ppc_elf_tdata (ibfd)->has_rel16)
4017 plt_type = PLT_NEW;
4018 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4019 {
4020 plt_type = PLT_OLD;
4021 htab->old_bfd = ibfd;
4022 break;
4023 }
4024 }
4025 htab->plt_type = plt_type;
4026 }
4027 }
4028 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4029 {
4030 if (htab->old_bfd != NULL)
4031 _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd);
4032 else
4033 _bfd_error_handler (_("bss-plt forced by profiling"));
4034 }
4035
4036 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4037
4038 if (htab->plt_type == PLT_NEW)
4039 {
4040 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4041 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4042
4043 /* The new PLT is a loaded section. */
4044 if (htab->elf.splt != NULL
4045 && !bfd_set_section_flags (htab->elf.splt, flags))
4046 return -1;
4047
4048 /* The new GOT is not executable. */
4049 if (htab->elf.sgot != NULL
4050 && !bfd_set_section_flags (htab->elf.sgot, flags))
4051 return -1;
4052 }
4053 else
4054 {
4055 /* Stop an unused .glink section from affecting .text alignment. */
4056 if (htab->glink != NULL
4057 && !bfd_set_section_alignment (htab->glink, 0))
4058 return -1;
4059 }
4060 return htab->plt_type == PLT_NEW;
4061 }
4062
4063 /* Return the section that should be marked against GC for a given
4065 relocation. */
4066
4067 static asection *
4068 ppc_elf_gc_mark_hook (asection *sec,
4069 struct bfd_link_info *info,
4070 Elf_Internal_Rela *rel,
4071 struct elf_link_hash_entry *h,
4072 Elf_Internal_Sym *sym)
4073 {
4074 if (h != NULL)
4075 switch (ELF32_R_TYPE (rel->r_info))
4076 {
4077 case R_PPC_GNU_VTINHERIT:
4078 case R_PPC_GNU_VTENTRY:
4079 return NULL;
4080 }
4081
4082 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4083 }
4084
4085 static bfd_boolean
4086 get_sym_h (struct elf_link_hash_entry **hp,
4087 Elf_Internal_Sym **symp,
4088 asection **symsecp,
4089 unsigned char **tls_maskp,
4090 Elf_Internal_Sym **locsymsp,
4091 unsigned long r_symndx,
4092 bfd *ibfd)
4093 {
4094 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4095
4096 if (r_symndx >= symtab_hdr->sh_info)
4097 {
4098 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4099 struct elf_link_hash_entry *h;
4100
4101 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4102 while (h->root.type == bfd_link_hash_indirect
4103 || h->root.type == bfd_link_hash_warning)
4104 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4105
4106 if (hp != NULL)
4107 *hp = h;
4108
4109 if (symp != NULL)
4110 *symp = NULL;
4111
4112 if (symsecp != NULL)
4113 {
4114 asection *symsec = NULL;
4115 if (h->root.type == bfd_link_hash_defined
4116 || h->root.type == bfd_link_hash_defweak)
4117 symsec = h->root.u.def.section;
4118 *symsecp = symsec;
4119 }
4120
4121 if (tls_maskp != NULL)
4122 *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask;
4123 }
4124 else
4125 {
4126 Elf_Internal_Sym *sym;
4127 Elf_Internal_Sym *locsyms = *locsymsp;
4128
4129 if (locsyms == NULL)
4130 {
4131 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4132 if (locsyms == NULL)
4133 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4134 symtab_hdr->sh_info,
4135 0, NULL, NULL, NULL);
4136 if (locsyms == NULL)
4137 return FALSE;
4138 *locsymsp = locsyms;
4139 }
4140 sym = locsyms + r_symndx;
4141
4142 if (hp != NULL)
4143 *hp = NULL;
4144
4145 if (symp != NULL)
4146 *symp = sym;
4147
4148 if (symsecp != NULL)
4149 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4150
4151 if (tls_maskp != NULL)
4152 {
4153 bfd_signed_vma *local_got;
4154 unsigned char *tls_mask;
4155
4156 tls_mask = NULL;
4157 local_got = elf_local_got_refcounts (ibfd);
4158 if (local_got != NULL)
4159 {
4160 struct plt_entry **local_plt = (struct plt_entry **)
4161 (local_got + symtab_hdr->sh_info);
4162 unsigned char *lgot_masks = (unsigned char *)
4163 (local_plt + symtab_hdr->sh_info);
4164 tls_mask = &lgot_masks[r_symndx];
4165 }
4166 *tls_maskp = tls_mask;
4167 }
4168 }
4169 return TRUE;
4170 }
4171
4172 /* Analyze inline PLT call relocations to see whether calls to locally
4174 defined functions can be converted to direct calls. */
4175
4176 bfd_boolean
4177 ppc_elf_inline_plt (struct bfd_link_info *info)
4178 {
4179 struct ppc_elf_link_hash_table *htab;
4180 bfd *ibfd;
4181 asection *sec;
4182 bfd_vma low_vma, high_vma, limit;
4183
4184 htab = ppc_elf_hash_table (info);
4185 if (htab == NULL)
4186 return FALSE;
4187
4188 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
4189 reduced somewhat to cater for possible stubs that might be added
4190 between the call and its destination. */
4191 limit = 0x1e00000;
4192 low_vma = -1;
4193 high_vma = 0;
4194 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
4195 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
4196 {
4197 if (low_vma > sec->vma)
4198 low_vma = sec->vma;
4199 if (high_vma < sec->vma + sec->size)
4200 high_vma = sec->vma + sec->size;
4201 }
4202
4203 /* If a "bl" can reach anywhere in local code sections, then we can
4204 convert all inline PLT sequences to direct calls when the symbol
4205 is local. */
4206 if (high_vma - low_vma < limit)
4207 {
4208 htab->can_convert_all_inline_plt = 1;
4209 return TRUE;
4210 }
4211
4212 /* Otherwise, go looking through relocs for cases where a direct
4213 call won't reach. Mark the symbol on any such reloc to disable
4214 the optimization and keep the PLT entry as it seems likely that
4215 this will be better than creating trampolines. Note that this
4216 will disable the optimization for all inline PLT calls to a
4217 particular symbol, not just those that won't reach. The
4218 difficulty in doing a more precise optimization is that the
4219 linker needs to make a decision depending on whether a
4220 particular R_PPC_PLTCALL insn can be turned into a direct
4221 call, for each of the R_PPC_PLTSEQ and R_PPC_PLT16* insns in
4222 the sequence, and there is nothing that ties those relocs
4223 together except their symbol. */
4224
4225 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4226 {
4227 Elf_Internal_Shdr *symtab_hdr;
4228 Elf_Internal_Sym *local_syms;
4229
4230 if (!is_ppc_elf (ibfd))
4231 continue;
4232
4233 local_syms = NULL;
4234 symtab_hdr = &elf_symtab_hdr (ibfd);
4235
4236 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4237 if (sec->has_pltcall
4238 && !bfd_is_abs_section (sec->output_section))
4239 {
4240 Elf_Internal_Rela *relstart, *rel, *relend;
4241
4242 /* Read the relocations. */
4243 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4244 info->keep_memory);
4245 if (relstart == NULL)
4246 return FALSE;
4247
4248 relend = relstart + sec->reloc_count;
4249 for (rel = relstart; rel < relend; rel++)
4250 {
4251 enum elf_ppc_reloc_type r_type;
4252 unsigned long r_symndx;
4253 asection *sym_sec;
4254 struct elf_link_hash_entry *h;
4255 Elf_Internal_Sym *sym;
4256 unsigned char *tls_maskp;
4257
4258 r_type = ELF32_R_TYPE (rel->r_info);
4259 if (r_type != R_PPC_PLTCALL)
4260 continue;
4261
4262 r_symndx = ELF32_R_SYM (rel->r_info);
4263 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
4264 r_symndx, ibfd))
4265 {
4266 if (elf_section_data (sec)->relocs != relstart)
4267 free (relstart);
4268 if (local_syms != NULL
4269 && symtab_hdr->contents != (unsigned char *) local_syms)
4270 free (local_syms);
4271 return FALSE;
4272 }
4273
4274 if (sym_sec != NULL && sym_sec->output_section != NULL)
4275 {
4276 bfd_vma from, to;
4277 if (h != NULL)
4278 to = h->root.u.def.value;
4279 else
4280 to = sym->st_value;
4281 to += (rel->r_addend
4282 + sym_sec->output_offset
4283 + sym_sec->output_section->vma);
4284 from = (rel->r_offset
4285 + sec->output_offset
4286 + sec->output_section->vma);
4287 if (to - from + limit < 2 * limit)
4288 *tls_maskp &= ~PLT_KEEP;
4289 }
4290 }
4291 if (elf_section_data (sec)->relocs != relstart)
4292 free (relstart);
4293 }
4294
4295 if (local_syms != NULL
4296 && symtab_hdr->contents != (unsigned char *) local_syms)
4297 {
4298 if (!info->keep_memory)
4299 free (local_syms);
4300 else
4301 symtab_hdr->contents = (unsigned char *) local_syms;
4302 }
4303 }
4304
4305 return TRUE;
4306 }
4307
4308 /* Set plt output section type, htab->tls_get_addr, and call the
4309 generic ELF tls_setup function. */
4310
4311 asection *
4312 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4313 {
4314 struct ppc_elf_link_hash_table *htab;
4315
4316 htab = ppc_elf_hash_table (info);
4317 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4318 FALSE, FALSE, TRUE);
4319 if (htab->plt_type != PLT_NEW)
4320 htab->params->no_tls_get_addr_opt = TRUE;
4321
4322 if (!htab->params->no_tls_get_addr_opt)
4323 {
4324 struct elf_link_hash_entry *opt, *tga;
4325 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4326 FALSE, FALSE, TRUE);
4327 if (opt != NULL
4328 && (opt->root.type == bfd_link_hash_defined
4329 || opt->root.type == bfd_link_hash_defweak))
4330 {
4331 /* If glibc supports an optimized __tls_get_addr call stub,
4332 signalled by the presence of __tls_get_addr_opt, and we'll
4333 be calling __tls_get_addr via a plt call stub, then
4334 make __tls_get_addr point to __tls_get_addr_opt. */
4335 tga = htab->tls_get_addr;
4336 if (htab->elf.dynamic_sections_created
4337 && tga != NULL
4338 && (tga->type == STT_FUNC
4339 || tga->needs_plt)
4340 && !(SYMBOL_CALLS_LOCAL (info, tga)
4341 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
4342 {
4343 struct plt_entry *ent;
4344 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
4345 if (ent->plt.refcount > 0)
4346 break;
4347 if (ent != NULL)
4348 {
4349 tga->root.type = bfd_link_hash_indirect;
4350 tga->root.u.i.link = &opt->root;
4351 ppc_elf_copy_indirect_symbol (info, opt, tga);
4352 opt->mark = 1;
4353 if (opt->dynindx != -1)
4354 {
4355 /* Use __tls_get_addr_opt in dynamic relocations. */
4356 opt->dynindx = -1;
4357 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4358 opt->dynstr_index);
4359 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4360 return FALSE;
4361 }
4362 htab->tls_get_addr = opt;
4363 }
4364 }
4365 }
4366 else
4367 htab->params->no_tls_get_addr_opt = TRUE;
4368 }
4369 if (htab->plt_type == PLT_NEW
4370 && htab->elf.splt != NULL
4371 && htab->elf.splt->output_section != NULL)
4372 {
4373 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
4374 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
4375 }
4376
4377 return _bfd_elf_tls_setup (obfd, info);
4378 }
4379
4380 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4381 HASH. */
4382
4383 static bfd_boolean
4384 branch_reloc_hash_match (const bfd *ibfd,
4385 const Elf_Internal_Rela *rel,
4386 const struct elf_link_hash_entry *hash)
4387 {
4388 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4389 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4390 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4391
4392 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4393 {
4394 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4395 struct elf_link_hash_entry *h;
4396
4397 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4398 while (h->root.type == bfd_link_hash_indirect
4399 || h->root.type == bfd_link_hash_warning)
4400 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4401 if (h == hash)
4402 return TRUE;
4403 }
4404 return FALSE;
4405 }
4406
4407 /* Run through all the TLS relocs looking for optimization
4408 opportunities. */
4409
4410 bfd_boolean
4411 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4412 struct bfd_link_info *info)
4413 {
4414 bfd *ibfd;
4415 asection *sec;
4416 struct ppc_elf_link_hash_table *htab;
4417 int pass;
4418
4419 if (!bfd_link_executable (info))
4420 return TRUE;
4421
4422 htab = ppc_elf_hash_table (info);
4423 if (htab == NULL)
4424 return FALSE;
4425
4426 /* Make two passes through the relocs. First time check that tls
4427 relocs involved in setting up a tls_get_addr call are indeed
4428 followed by such a call. If they are not, don't do any tls
4429 optimization. On the second pass twiddle tls_mask flags to
4430 notify relocate_section that optimization can be done, and
4431 adjust got and plt refcounts. */
4432 for (pass = 0; pass < 2; ++pass)
4433 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
4434 {
4435 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4436 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
4437
4438 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4439 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4440 {
4441 Elf_Internal_Rela *relstart, *rel, *relend;
4442 int expecting_tls_get_addr = 0;
4443
4444 /* Read the relocations. */
4445 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4446 info->keep_memory);
4447 if (relstart == NULL)
4448 return FALSE;
4449
4450 relend = relstart + sec->reloc_count;
4451 for (rel = relstart; rel < relend; rel++)
4452 {
4453 enum elf_ppc_reloc_type r_type;
4454 unsigned long r_symndx;
4455 struct elf_link_hash_entry *h = NULL;
4456 unsigned char *tls_mask;
4457 unsigned char tls_set, tls_clear;
4458 bfd_boolean is_local;
4459 bfd_signed_vma *got_count;
4460
4461 r_symndx = ELF32_R_SYM (rel->r_info);
4462 if (r_symndx >= symtab_hdr->sh_info)
4463 {
4464 struct elf_link_hash_entry **sym_hashes;
4465
4466 sym_hashes = elf_sym_hashes (ibfd);
4467 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4468 while (h->root.type == bfd_link_hash_indirect
4469 || h->root.type == bfd_link_hash_warning)
4470 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4471 }
4472
4473 is_local = SYMBOL_REFERENCES_LOCAL (info, h);
4474 r_type = ELF32_R_TYPE (rel->r_info);
4475 /* If this section has old-style __tls_get_addr calls
4476 without marker relocs, then check that each
4477 __tls_get_addr call reloc is preceded by a reloc
4478 that conceivably belongs to the __tls_get_addr arg
4479 setup insn. If we don't find matching arg setup
4480 relocs, don't do any tls optimization. */
4481 if (pass == 0
4482 && sec->nomark_tls_get_addr
4483 && h != NULL
4484 && h == htab->tls_get_addr
4485 && !expecting_tls_get_addr
4486 && is_branch_reloc (r_type))
4487 {
4488 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
4489 "TLS optimization disabled\n",
4490 ibfd, sec, rel->r_offset);
4491 if (elf_section_data (sec)->relocs != relstart)
4492 free (relstart);
4493 return TRUE;
4494 }
4495
4496 expecting_tls_get_addr = 0;
4497 switch (r_type)
4498 {
4499 case R_PPC_GOT_TLSLD16:
4500 case R_PPC_GOT_TLSLD16_LO:
4501 expecting_tls_get_addr = 1;
4502 /* Fall through. */
4503
4504 case R_PPC_GOT_TLSLD16_HI:
4505 case R_PPC_GOT_TLSLD16_HA:
4506 /* These relocs should never be against a symbol
4507 defined in a shared lib. Leave them alone if
4508 that turns out to be the case. */
4509 if (!is_local)
4510 continue;
4511
4512 /* LD -> LE */
4513 tls_set = 0;
4514 tls_clear = TLS_LD;
4515 break;
4516
4517 case R_PPC_GOT_TLSGD16:
4518 case R_PPC_GOT_TLSGD16_LO:
4519 expecting_tls_get_addr = 1;
4520 /* Fall through. */
4521
4522 case R_PPC_GOT_TLSGD16_HI:
4523 case R_PPC_GOT_TLSGD16_HA:
4524 if (is_local)
4525 /* GD -> LE */
4526 tls_set = 0;
4527 else
4528 /* GD -> IE */
4529 tls_set = TLS_TLS | TLS_GDIE;
4530 tls_clear = TLS_GD;
4531 break;
4532
4533 case R_PPC_GOT_TPREL16:
4534 case R_PPC_GOT_TPREL16_LO:
4535 case R_PPC_GOT_TPREL16_HI:
4536 case R_PPC_GOT_TPREL16_HA:
4537 if (is_local)
4538 {
4539 /* IE -> LE */
4540 tls_set = 0;
4541 tls_clear = TLS_TPREL;
4542 break;
4543 }
4544 else
4545 continue;
4546
4547 case R_PPC_TLSLD:
4548 if (!is_local)
4549 continue;
4550 /* Fall through. */
4551 case R_PPC_TLSGD:
4552 if (rel + 1 < relend
4553 && is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
4554 {
4555 if (pass != 0
4556 && ELF32_R_TYPE (rel[1].r_info) != R_PPC_PLTSEQ)
4557 {
4558 r_type = ELF32_R_TYPE (rel[1].r_info);
4559 r_symndx = ELF32_R_SYM (rel[1].r_info);
4560 if (r_symndx >= symtab_hdr->sh_info)
4561 {
4562 struct elf_link_hash_entry **sym_hashes;
4563
4564 sym_hashes = elf_sym_hashes (ibfd);
4565 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4566 while (h->root.type == bfd_link_hash_indirect
4567 || h->root.type == bfd_link_hash_warning)
4568 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4569 if (h != NULL)
4570 {
4571 struct plt_entry *ent = NULL;
4572 bfd_vma addend = 0;
4573
4574 if (bfd_link_pic (info))
4575 addend = rel->r_addend;
4576 ent = find_plt_ent (&h->plt.plist,
4577 got2, addend);
4578 if (ent != NULL
4579 && ent->plt.refcount > 0)
4580 ent->plt.refcount -= 1;
4581 }
4582 }
4583 }
4584 continue;
4585 }
4586 expecting_tls_get_addr = 2;
4587 tls_set = 0;
4588 tls_clear = 0;
4589 break;
4590
4591 default:
4592 continue;
4593 }
4594
4595 if (pass == 0)
4596 {
4597 if (!expecting_tls_get_addr
4598 || !sec->nomark_tls_get_addr)
4599 continue;
4600
4601 if (rel + 1 < relend
4602 && branch_reloc_hash_match (ibfd, rel + 1,
4603 htab->tls_get_addr))
4604 continue;
4605
4606 /* Uh oh, we didn't find the expected call. We
4607 could just mark this symbol to exclude it
4608 from tls optimization but it's safer to skip
4609 the entire optimization. */
4610 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
4611 "TLS optimization disabled\n"),
4612 ibfd, sec, rel->r_offset);
4613 if (elf_section_data (sec)->relocs != relstart)
4614 free (relstart);
4615 return TRUE;
4616 }
4617
4618 if (h != NULL)
4619 {
4620 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4621 got_count = &h->got.refcount;
4622 }
4623 else
4624 {
4625 bfd_signed_vma *lgot_refs;
4626 struct plt_entry **local_plt;
4627 unsigned char *lgot_masks;
4628
4629 lgot_refs = elf_local_got_refcounts (ibfd);
4630 if (lgot_refs == NULL)
4631 abort ();
4632 local_plt = (struct plt_entry **)
4633 (lgot_refs + symtab_hdr->sh_info);
4634 lgot_masks = (unsigned char *)
4635 (local_plt + symtab_hdr->sh_info);
4636 tls_mask = &lgot_masks[r_symndx];
4637 got_count = &lgot_refs[r_symndx];
4638 }
4639
4640 /* If we don't have old-style __tls_get_addr calls
4641 without TLSGD/TLSLD marker relocs, and we haven't
4642 found a new-style __tls_get_addr call with a
4643 marker for this symbol, then we either have a
4644 broken object file or an -mlongcall style
4645 indirect call to __tls_get_addr without a marker.
4646 Disable optimization in this case. */
4647 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
4648 && !sec->nomark_tls_get_addr
4649 && ((*tls_mask & (TLS_TLS | TLS_MARK))
4650 != (TLS_TLS | TLS_MARK)))
4651 continue;
4652
4653 if (expecting_tls_get_addr == 1 + !sec->nomark_tls_get_addr)
4654 {
4655 struct plt_entry *ent;
4656 bfd_vma addend = 0;
4657
4658 if (bfd_link_pic (info)
4659 && (ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24
4660 || ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTCALL))
4661 addend = rel[1].r_addend;
4662 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4663 got2, addend);
4664 if (ent != NULL && ent->plt.refcount > 0)
4665 ent->plt.refcount -= 1;
4666 }
4667 if (tls_clear == 0)
4668 continue;
4669
4670 if (tls_set == 0)
4671 {
4672 /* We managed to get rid of a got entry. */
4673 if (*got_count > 0)
4674 *got_count -= 1;
4675 }
4676
4677 *tls_mask |= tls_set;
4678 *tls_mask &= ~tls_clear;
4679 }
4680
4681 if (elf_section_data (sec)->relocs != relstart)
4682 free (relstart);
4683 }
4684 }
4685 htab->do_tls_opt = 1;
4686 return TRUE;
4687 }
4688
4689 /* Find dynamic relocs for H that apply to read-only sections. */
4691
4692 static asection *
4693 readonly_dynrelocs (struct elf_link_hash_entry *h)
4694 {
4695 struct elf_dyn_relocs *p;
4696
4697 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4698 {
4699 asection *s = p->sec->output_section;
4700
4701 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4702 return p->sec;
4703 }
4704 return NULL;
4705 }
4706
4707 /* Return true if we have dynamic relocs against H or any of its weak
4708 aliases, that apply to read-only sections. Cannot be used after
4709 size_dynamic_sections. */
4710
4711 static bfd_boolean
4712 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
4713 {
4714 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
4715 do
4716 {
4717 if (readonly_dynrelocs (&eh->elf))
4718 return TRUE;
4719 eh = ppc_elf_hash_entry (eh->elf.u.alias);
4720 } while (eh != NULL && &eh->elf != h);
4721
4722 return FALSE;
4723 }
4724
4725 /* Return whether H has pc-relative dynamic relocs. */
4726
4727 static bfd_boolean
4728 pc_dynrelocs (struct elf_link_hash_entry *h)
4729 {
4730 struct elf_dyn_relocs *p;
4731
4732 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4733 if (p->pc_count != 0)
4734 return TRUE;
4735 return FALSE;
4736 }
4737
4738 /* Adjust a symbol defined by a dynamic object and referenced by a
4739 regular object. The current definition is in some section of the
4740 dynamic object, but we're not including those sections. We have to
4741 change the definition to something the rest of the link can
4742 understand. */
4743
4744 static bfd_boolean
4745 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4746 struct elf_link_hash_entry *h)
4747 {
4748 struct ppc_elf_link_hash_table *htab;
4749 asection *s;
4750
4751 #ifdef DEBUG
4752 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4753 h->root.root.string);
4754 #endif
4755
4756 /* Make sure we know what is going on here. */
4757 htab = ppc_elf_hash_table (info);
4758 BFD_ASSERT (htab->elf.dynobj != NULL
4759 && (h->needs_plt
4760 || h->type == STT_GNU_IFUNC
4761 || h->is_weakalias
4762 || (h->def_dynamic
4763 && h->ref_regular
4764 && !h->def_regular)));
4765
4766 /* Deal with function syms. */
4767 if (h->type == STT_FUNC
4768 || h->type == STT_GNU_IFUNC
4769 || h->needs_plt)
4770 {
4771 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
4772 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
4773 /* Discard dyn_relocs when non-pic if we've decided that a
4774 function symbol is local. */
4775 if (!bfd_link_pic (info) && local)
4776 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
4777
4778 /* Clear procedure linkage table information for any symbol that
4779 won't need a .plt entry. */
4780 struct plt_entry *ent;
4781 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4782 if (ent->plt.refcount > 0)
4783 break;
4784 if (ent == NULL
4785 || (h->type != STT_GNU_IFUNC
4786 && local
4787 && (htab->can_convert_all_inline_plt
4788 || (ppc_elf_hash_entry (h)->tls_mask
4789 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
4790 {
4791 /* A PLT entry is not required/allowed when:
4792
4793 1. We are not using ld.so; because then the PLT entry
4794 can't be set up, so we can't use one. In this case,
4795 ppc_elf_adjust_dynamic_symbol won't even be called.
4796
4797 2. GC has rendered the entry unused.
4798
4799 3. We know for certain that a call to this symbol
4800 will go to this object, or will remain undefined. */
4801 h->plt.plist = NULL;
4802 h->needs_plt = 0;
4803 h->pointer_equality_needed = 0;
4804 }
4805 else
4806 {
4807 /* Taking a function's address in a read/write section
4808 doesn't require us to define the function symbol in the
4809 executable on a plt call stub. A dynamic reloc can
4810 be used instead, giving better runtime performance.
4811 (Calls via that function pointer don't need to bounce
4812 through the plt call stub.) Similarly, use a dynamic
4813 reloc for a weak reference when possible, allowing the
4814 resolution of the symbol to be set at load time rather
4815 than link time. */
4816 if ((h->pointer_equality_needed
4817 || (h->non_got_ref
4818 && !h->ref_regular_nonweak
4819 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4820 && !htab->is_vxworks
4821 && !ppc_elf_hash_entry (h)->has_sda_refs
4822 && !readonly_dynrelocs (h))
4823 {
4824 h->pointer_equality_needed = 0;
4825 /* If we haven't seen a branch reloc and the symbol
4826 isn't an ifunc then we don't need a plt entry. */
4827 if (!h->needs_plt && h->type != STT_GNU_IFUNC)
4828 h->plt.plist = NULL;
4829 }
4830 else if (!bfd_link_pic (info))
4831 /* We are going to be defining the function symbol on the
4832 plt stub, so no dyn_relocs needed when non-pic. */
4833 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
4834 }
4835 h->protected_def = 0;
4836 /* Function symbols can't have copy relocs. */
4837 return TRUE;
4838 }
4839 else
4840 h->plt.plist = NULL;
4841
4842 /* If this is a weak symbol, and there is a real definition, the
4843 processor independent code will have arranged for us to see the
4844 real definition first, and we can just use the same value. */
4845 if (h->is_weakalias)
4846 {
4847 struct elf_link_hash_entry *def = weakdef (h);
4848 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
4849 h->root.u.def.section = def->root.u.def.section;
4850 h->root.u.def.value = def->root.u.def.value;
4851 if (def->root.u.def.section == htab->elf.sdynbss
4852 || def->root.u.def.section == htab->elf.sdynrelro
4853 || def->root.u.def.section == htab->dynsbss)
4854 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
4855 return TRUE;
4856 }
4857
4858 /* This is a reference to a symbol defined by a dynamic object which
4859 is not a function. */
4860
4861 /* If we are creating a shared library, we must presume that the
4862 only references to the symbol are via the global offset table.
4863 For such cases we need not do anything here; the relocations will
4864 be handled correctly by relocate_section. */
4865 if (bfd_link_pic (info))
4866 {
4867 h->protected_def = 0;
4868 return TRUE;
4869 }
4870
4871 /* If there are no references to this symbol that do not use the
4872 GOT, we don't need to generate a copy reloc. */
4873 if (!h->non_got_ref)
4874 {
4875 h->protected_def = 0;
4876 return TRUE;
4877 }
4878
4879 /* Protected variables do not work with .dynbss. The copy in
4880 .dynbss won't be used by the shared library with the protected
4881 definition for the variable. Editing to PIC, or text relocations
4882 are preferable to an incorrect program. */
4883 if (h->protected_def)
4884 {
4885 if (ELIMINATE_COPY_RELOCS
4886 && ppc_elf_hash_entry (h)->has_addr16_ha
4887 && ppc_elf_hash_entry (h)->has_addr16_lo
4888 && htab->params->pic_fixup == 0
4889 && info->disable_target_specific_optimizations <= 1)
4890 htab->params->pic_fixup = 1;
4891 return TRUE;
4892 }
4893
4894 /* If -z nocopyreloc was given, we won't generate them either. */
4895 if (info->nocopyreloc)
4896 return TRUE;
4897
4898 /* If we don't find any dynamic relocs in read-only sections, then
4899 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4900 We can't do this if there are any small data relocations. This
4901 doesn't work on VxWorks, where we can not have dynamic
4902 relocations (other than copy and jump slot relocations) in an
4903 executable. */
4904 if (ELIMINATE_COPY_RELOCS
4905 && !ppc_elf_hash_entry (h)->has_sda_refs
4906 && !htab->is_vxworks
4907 && !h->def_regular
4908 && !alias_readonly_dynrelocs (h))
4909 return TRUE;
4910
4911 /* We must allocate the symbol in our .dynbss section, which will
4912 become part of the .bss section of the executable. There will be
4913 an entry for this symbol in the .dynsym section. The dynamic
4914 object will contain position independent code, so all references
4915 from the dynamic object to this symbol will go through the global
4916 offset table. The dynamic linker will use the .dynsym entry to
4917 determine the address it must put in the global offset table, so
4918 both the dynamic object and the regular object will refer to the
4919 same memory location for the variable.
4920
4921 Of course, if the symbol is referenced using SDAREL relocs, we
4922 must instead allocate it in .sbss. */
4923 if (ppc_elf_hash_entry (h)->has_sda_refs)
4924 s = htab->dynsbss;
4925 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
4926 s = htab->elf.sdynrelro;
4927 else
4928 s = htab->elf.sdynbss;
4929 BFD_ASSERT (s != NULL);
4930
4931 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
4932 {
4933 asection *srel;
4934
4935 /* We must generate a R_PPC_COPY reloc to tell the dynamic
4936 linker to copy the initial value out of the dynamic object
4937 and into the runtime process image. */
4938 if (ppc_elf_hash_entry (h)->has_sda_refs)
4939 srel = htab->relsbss;
4940 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
4941 srel = htab->elf.sreldynrelro;
4942 else
4943 srel = htab->elf.srelbss;
4944 BFD_ASSERT (srel != NULL);
4945 srel->size += sizeof (Elf32_External_Rela);
4946 h->needs_copy = 1;
4947 }
4948
4949 /* We no longer want dyn_relocs. */
4950 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
4951 return _bfd_elf_adjust_dynamic_copy (info, h, s);
4952 }
4953
4954 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4956 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4957 specifying the addend on the plt relocation. For -fpic code, the sym
4958 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4959 xxxxxxxx.got2.plt_pic32.<callee>. */
4960
4961 static bfd_boolean
4962 add_stub_sym (struct plt_entry *ent,
4963 struct elf_link_hash_entry *h,
4964 struct bfd_link_info *info)
4965 {
4966 struct elf_link_hash_entry *sh;
4967 size_t len1, len2, len3;
4968 char *name;
4969 const char *stub;
4970 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4971
4972 if (bfd_link_pic (info))
4973 stub = ".plt_pic32.";
4974 else
4975 stub = ".plt_call32.";
4976
4977 len1 = strlen (h->root.root.string);
4978 len2 = strlen (stub);
4979 len3 = 0;
4980 if (ent->sec)
4981 len3 = strlen (ent->sec->name);
4982 name = bfd_malloc (len1 + len2 + len3 + 9);
4983 if (name == NULL)
4984 return FALSE;
4985 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4986 if (ent->sec)
4987 memcpy (name + 8, ent->sec->name, len3);
4988 memcpy (name + 8 + len3, stub, len2);
4989 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4990 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4991 if (sh == NULL)
4992 return FALSE;
4993 if (sh->root.type == bfd_link_hash_new)
4994 {
4995 sh->root.type = bfd_link_hash_defined;
4996 sh->root.u.def.section = htab->glink;
4997 sh->root.u.def.value = ent->glink_offset;
4998 sh->ref_regular = 1;
4999 sh->def_regular = 1;
5000 sh->ref_regular_nonweak = 1;
5001 sh->forced_local = 1;
5002 sh->non_elf = 0;
5003 sh->root.linker_def = 1;
5004 }
5005 return TRUE;
5006 }
5007
5008 /* Allocate NEED contiguous space in .got, and return the offset.
5009 Handles allocation of the got header when crossing 32k. */
5010
5011 static bfd_vma
5012 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5013 {
5014 bfd_vma where;
5015 unsigned int max_before_header;
5016
5017 if (htab->plt_type == PLT_VXWORKS)
5018 {
5019 where = htab->elf.sgot->size;
5020 htab->elf.sgot->size += need;
5021 }
5022 else
5023 {
5024 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5025 if (need <= htab->got_gap)
5026 {
5027 where = max_before_header - htab->got_gap;
5028 htab->got_gap -= need;
5029 }
5030 else
5031 {
5032 if (htab->elf.sgot->size + need > max_before_header
5033 && htab->elf.sgot->size <= max_before_header)
5034 {
5035 htab->got_gap = max_before_header - htab->elf.sgot->size;
5036 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5037 }
5038 where = htab->elf.sgot->size;
5039 htab->elf.sgot->size += need;
5040 }
5041 }
5042 return where;
5043 }
5044
5045 /* Calculate size of GOT entries for symbol given its TLS_MASK.
5046 TLS_LD is excluded because those go in a special GOT slot. */
5047
5048 static inline unsigned int
5049 got_entries_needed (int tls_mask)
5050 {
5051 unsigned int need;
5052 if ((tls_mask & TLS_TLS) == 0)
5053 need = 4;
5054 else
5055 {
5056 need = 0;
5057 if ((tls_mask & TLS_GD) != 0)
5058 need += 8;
5059 if ((tls_mask & (TLS_TPREL | TLS_GDIE)) != 0)
5060 need += 4;
5061 if ((tls_mask & TLS_DTPREL) != 0)
5062 need += 4;
5063 }
5064 return need;
5065 }
5066
5067 /* If H is undefined, make it dynamic if that makes sense. */
5068
5069 static bfd_boolean
5070 ensure_undef_dynamic (struct bfd_link_info *info,
5071 struct elf_link_hash_entry *h)
5072 {
5073 struct elf_link_hash_table *htab = elf_hash_table (info);
5074
5075 if (htab->dynamic_sections_created
5076 && ((info->dynamic_undefined_weak != 0
5077 && h->root.type == bfd_link_hash_undefweak)
5078 || h->root.type == bfd_link_hash_undefined)
5079 && h->dynindx == -1
5080 && !h->forced_local
5081 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5082 return bfd_elf_link_record_dynamic_symbol (info, h);
5083 return TRUE;
5084 }
5085
5086 /* Allocate space in associated reloc sections for dynamic relocs. */
5087
5088 static bfd_boolean
5089 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5090 {
5091 struct bfd_link_info *info = inf;
5092 struct ppc_elf_link_hash_entry *eh;
5093 struct ppc_elf_link_hash_table *htab;
5094 struct elf_dyn_relocs *p;
5095 bfd_boolean dyn;
5096
5097 if (h->root.type == bfd_link_hash_indirect)
5098 return TRUE;
5099
5100 htab = ppc_elf_hash_table (info);
5101 eh = (struct ppc_elf_link_hash_entry *) h;
5102 if (eh->elf.got.refcount > 0
5103 || (ELIMINATE_COPY_RELOCS
5104 && !eh->elf.def_regular
5105 && eh->elf.protected_def
5106 && eh->has_addr16_ha
5107 && eh->has_addr16_lo
5108 && htab->params->pic_fixup > 0))
5109 {
5110 unsigned int need;
5111
5112 /* Make sure this symbol is output as a dynamic symbol. */
5113 if (!ensure_undef_dynamic (info, &eh->elf))
5114 return FALSE;
5115
5116 need = 0;
5117 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
5118 {
5119 if (SYMBOL_REFERENCES_LOCAL (info, &eh->elf))
5120 /* We'll just use htab->tlsld_got.offset. This should
5121 always be the case. It's a little odd if we have
5122 a local dynamic reloc against a non-local symbol. */
5123 htab->tlsld_got.refcount += 1;
5124 else
5125 need += 8;
5126 }
5127 need += got_entries_needed (eh->tls_mask);
5128 if (need == 0)
5129 eh->elf.got.offset = (bfd_vma) -1;
5130 else
5131 {
5132 eh->elf.got.offset = allocate_got (htab, need);
5133 if (((bfd_link_pic (info)
5134 && !((eh->tls_mask & TLS_TLS) != 0
5135 && bfd_link_executable (info)
5136 && SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5137 || (htab->elf.dynamic_sections_created
5138 && eh->elf.dynindx != -1
5139 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5140 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
5141 {
5142 asection *rsec;
5143
5144 need *= sizeof (Elf32_External_Rela) / 4;
5145 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
5146 need -= sizeof (Elf32_External_Rela);
5147 rsec = htab->elf.srelgot;
5148 if (eh->elf.type == STT_GNU_IFUNC)
5149 rsec = htab->elf.irelplt;
5150 rsec->size += need;
5151 }
5152 }
5153 }
5154 else
5155 eh->elf.got.offset = (bfd_vma) -1;
5156
5157 /* If no dynamic sections we can't have dynamic relocs, except for
5158 IFUNCs which are handled even in static executables. */
5159 if (!htab->elf.dynamic_sections_created
5160 && h->type != STT_GNU_IFUNC)
5161 eh->dyn_relocs = NULL;
5162
5163 /* Discard relocs on undefined symbols that must be local. */
5164 else if (h->root.type == bfd_link_hash_undefined
5165 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5166 eh->dyn_relocs = NULL;
5167
5168 /* Also discard relocs on undefined weak syms with non-default
5169 visibility, or when dynamic_undefined_weak says so. */
5170 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5171 eh->dyn_relocs = NULL;
5172
5173 if (eh->dyn_relocs == NULL)
5174 ;
5175
5176 /* In the shared -Bsymbolic case, discard space allocated for
5177 dynamic pc-relative relocs against symbols which turn out to be
5178 defined in regular objects. For the normal shared case, discard
5179 space for relocs that have become local due to symbol visibility
5180 changes. */
5181 else if (bfd_link_pic (info))
5182 {
5183 /* Relocs that use pc_count are those that appear on a call insn,
5184 or certain REL relocs (see must_be_dyn_reloc) that can be
5185 generated via assembly. We want calls to protected symbols to
5186 resolve directly to the function rather than going via the plt.
5187 If people want function pointer comparisons to work as expected
5188 then they should avoid writing weird assembly. */
5189 if (SYMBOL_CALLS_LOCAL (info, h))
5190 {
5191 struct elf_dyn_relocs **pp;
5192
5193 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5194 {
5195 p->count -= p->pc_count;
5196 p->pc_count = 0;
5197 if (p->count == 0)
5198 *pp = p->next;
5199 else
5200 pp = &p->next;
5201 }
5202 }
5203
5204 if (htab->is_vxworks)
5205 {
5206 struct elf_dyn_relocs **pp;
5207
5208 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5209 {
5210 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5211 *pp = p->next;
5212 else
5213 pp = &p->next;
5214 }
5215 }
5216
5217 if (eh->dyn_relocs != NULL)
5218 {
5219 /* Make sure this symbol is output as a dynamic symbol. */
5220 if (!ensure_undef_dynamic (info, h))
5221 return FALSE;
5222 }
5223 }
5224 else if (ELIMINATE_COPY_RELOCS)
5225 {
5226 /* For the non-pic case, discard space for relocs against
5227 symbols which turn out to need copy relocs or are not
5228 dynamic. */
5229 if (h->dynamic_adjusted
5230 && !h->def_regular
5231 && !ELF_COMMON_DEF_P (h)
5232 && !(h->protected_def
5233 && eh->has_addr16_ha
5234 && eh->has_addr16_lo
5235 && htab->params->pic_fixup > 0))
5236 {
5237 /* Make sure this symbol is output as a dynamic symbol. */
5238 if (!ensure_undef_dynamic (info, h))
5239 return FALSE;
5240
5241 if (h->dynindx == -1)
5242 eh->dyn_relocs = NULL;
5243 }
5244 else
5245 eh->dyn_relocs = NULL;
5246 }
5247
5248 /* Allocate space. */
5249 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5250 {
5251 asection *sreloc = elf_section_data (p->sec)->sreloc;
5252 if (eh->elf.type == STT_GNU_IFUNC)
5253 sreloc = htab->elf.irelplt;
5254 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5255 }
5256
5257 /* Handle PLT relocs. Done last, after dynindx has settled.
5258 We might need a PLT entry when the symbol
5259 a) is dynamic, or
5260 b) is an ifunc, or
5261 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
5262 d) has plt16 relocs and we are linking statically. */
5263 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
5264 if (dyn
5265 || h->type == STT_GNU_IFUNC
5266 || (h->needs_plt && h->dynamic_adjusted)
5267 || (h->needs_plt
5268 && h->def_regular
5269 && !htab->elf.dynamic_sections_created
5270 && !htab->can_convert_all_inline_plt
5271 && (ppc_elf_hash_entry (h)->tls_mask
5272 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
5273 {
5274 struct plt_entry *ent;
5275 bfd_boolean doneone = FALSE;
5276 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
5277
5278 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5279 if (ent->plt.refcount > 0)
5280 {
5281 asection *s = htab->elf.splt;
5282
5283 if (!dyn)
5284 {
5285 if (h->type == STT_GNU_IFUNC)
5286 s = htab->elf.iplt;
5287 else
5288 s = htab->pltlocal;
5289 }
5290
5291 if (htab->plt_type == PLT_NEW || !dyn)
5292 {
5293 if (!doneone)
5294 {
5295 plt_offset = s->size;
5296 s->size += 4;
5297 }
5298 ent->plt.offset = plt_offset;
5299
5300 if (s == htab->pltlocal)
5301 ent->glink_offset = glink_offset;
5302 else
5303 {
5304 s = htab->glink;
5305 if (!doneone || bfd_link_pic (info))
5306 {
5307 glink_offset = s->size;
5308 s->size += GLINK_ENTRY_SIZE (htab, h);
5309 }
5310 if (!doneone
5311 && !bfd_link_pic (info)
5312 && h->def_dynamic
5313 && !h->def_regular)
5314 {
5315 h->root.u.def.section = s;
5316 h->root.u.def.value = glink_offset;
5317 }
5318 ent->glink_offset = glink_offset;
5319
5320 if (htab->params->emit_stub_syms
5321 && !add_stub_sym (ent, h, info))
5322 return FALSE;
5323 }
5324 }
5325 else
5326 {
5327 if (!doneone)
5328 {
5329 /* If this is the first .plt entry, make room
5330 for the special first entry. */
5331 if (s->size == 0)
5332 s->size += htab->plt_initial_entry_size;
5333
5334 /* The PowerPC PLT is actually composed of two
5335 parts, the first part is 2 words (for a load
5336 and a jump), and then there is a remaining
5337 word available at the end. */
5338 plt_offset = (htab->plt_initial_entry_size
5339 + (htab->plt_slot_size
5340 * ((s->size
5341 - htab->plt_initial_entry_size)
5342 / htab->plt_entry_size)));
5343
5344 /* If this symbol is not defined in a regular
5345 file, and we are not generating a shared
5346 library, then set the symbol to this location
5347 in the .plt. This is to avoid text
5348 relocations, and is required to make
5349 function pointers compare as equal between
5350 the normal executable and the shared library. */
5351 if (! bfd_link_pic (info)
5352 && h->def_dynamic
5353 && !h->def_regular)
5354 {
5355 h->root.u.def.section = s;
5356 h->root.u.def.value = plt_offset;
5357 }
5358
5359 /* Make room for this entry. */
5360 s->size += htab->plt_entry_size;
5361 /* After the 8192nd entry, room for two entries
5362 is allocated. */
5363 if (htab->plt_type == PLT_OLD
5364 && (s->size - htab->plt_initial_entry_size)
5365 / htab->plt_entry_size
5366 > PLT_NUM_SINGLE_ENTRIES)
5367 s->size += htab->plt_entry_size;
5368 }
5369 ent->plt.offset = plt_offset;
5370 }
5371
5372 /* We also need to make an entry in the .rela.plt section. */
5373 if (!doneone)
5374 {
5375 if (!dyn)
5376 {
5377 if (h->type == STT_GNU_IFUNC)
5378 {
5379 s = htab->elf.irelplt;
5380 s->size += sizeof (Elf32_External_Rela);
5381 }
5382 else if (bfd_link_pic (info))
5383 {
5384 s = htab->relpltlocal;
5385 s->size += sizeof (Elf32_External_Rela);
5386 }
5387 }
5388 else
5389 {
5390 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
5391
5392 if (htab->plt_type == PLT_VXWORKS)
5393 {
5394 /* Allocate space for the unloaded relocations. */
5395 if (!bfd_link_pic (info)
5396 && htab->elf.dynamic_sections_created)
5397 {
5398 if (ent->plt.offset
5399 == (bfd_vma) htab->plt_initial_entry_size)
5400 {
5401 htab->srelplt2->size
5402 += (sizeof (Elf32_External_Rela)
5403 * VXWORKS_PLTRESOLVE_RELOCS);
5404 }
5405
5406 htab->srelplt2->size
5407 += (sizeof (Elf32_External_Rela)
5408 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5409 }
5410
5411 /* Every PLT entry has an associated GOT entry in
5412 .got.plt. */
5413 htab->elf.sgotplt->size += 4;
5414 }
5415 }
5416 doneone = TRUE;
5417 }
5418 }
5419 else
5420 ent->plt.offset = (bfd_vma) -1;
5421
5422 if (!doneone)
5423 {
5424 h->plt.plist = NULL;
5425 h->needs_plt = 0;
5426 }
5427 }
5428 else
5429 {
5430 h->plt.plist = NULL;
5431 h->needs_plt = 0;
5432 }
5433
5434 return TRUE;
5435 }
5436
5437 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5438 read-only sections. */
5439
5440 static bfd_boolean
5441 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
5442 {
5443 asection *sec;
5444
5445 if (h->root.type == bfd_link_hash_indirect)
5446 return TRUE;
5447
5448 sec = readonly_dynrelocs (h);
5449 if (sec != NULL)
5450 {
5451 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
5452
5453 info->flags |= DF_TEXTREL;
5454 /* xgettext:c-format */
5455 info->callbacks->minfo (_("%pB: dynamic relocation against `%pT' "
5456 "in read-only section `%pA'\n"),
5457 sec->owner, h->root.root.string, sec);
5458 if ((info->warn_shared_textrel && bfd_link_pic (info))
5459 || info->error_textrel)
5460 /* xgettext:c-format */
5461 info->callbacks->einfo (_("%P: %pB: warning: relocation against `%s' "
5462 "in read-only section `%pA'\n"),
5463 sec->owner, h->root.root.string, sec);
5464
5465 /* Not an error, just cut short the traversal. */
5466 return FALSE;
5467 }
5468 return TRUE;
5469 }
5470
5471 static const unsigned char glink_eh_frame_cie[] =
5472 {
5473 0, 0, 0, 16, /* length. */
5474 0, 0, 0, 0, /* id. */
5475 1, /* CIE version. */
5476 'z', 'R', 0, /* Augmentation string. */
5477 4, /* Code alignment. */
5478 0x7c, /* Data alignment. */
5479 65, /* RA reg. */
5480 1, /* Augmentation size. */
5481 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
5482 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
5483 };
5484
5485 /* Set the sizes of the dynamic sections. */
5486
5487 static bfd_boolean
5488 ppc_elf_size_dynamic_sections (bfd *output_bfd,
5489 struct bfd_link_info *info)
5490 {
5491 struct ppc_elf_link_hash_table *htab;
5492 asection *s;
5493 bfd_boolean relocs;
5494 bfd *ibfd;
5495
5496 #ifdef DEBUG
5497 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5498 #endif
5499
5500 htab = ppc_elf_hash_table (info);
5501 BFD_ASSERT (htab->elf.dynobj != NULL);
5502
5503 if (elf_hash_table (info)->dynamic_sections_created)
5504 {
5505 /* Set the contents of the .interp section to the interpreter. */
5506 if (bfd_link_executable (info) && !info->nointerp)
5507 {
5508 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
5509 BFD_ASSERT (s != NULL);
5510 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5511 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5512 }
5513 }
5514
5515 if (htab->plt_type == PLT_OLD)
5516 htab->got_header_size = 16;
5517 else if (htab->plt_type == PLT_NEW)
5518 htab->got_header_size = 12;
5519
5520 /* Set up .got offsets for local syms, and space for local dynamic
5521 relocs. */
5522 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5523 {
5524 bfd_signed_vma *local_got;
5525 bfd_signed_vma *end_local_got;
5526 struct plt_entry **local_plt;
5527 struct plt_entry **end_local_plt;
5528 char *lgot_masks;
5529 bfd_size_type locsymcount;
5530 Elf_Internal_Shdr *symtab_hdr;
5531
5532 if (!is_ppc_elf (ibfd))
5533 continue;
5534
5535 for (s = ibfd->sections; s != NULL; s = s->next)
5536 {
5537 struct ppc_dyn_relocs *p;
5538
5539 for (p = ((struct ppc_dyn_relocs *)
5540 elf_section_data (s)->local_dynrel);
5541 p != NULL;
5542 p = p->next)
5543 {
5544 if (!bfd_is_abs_section (p->sec)
5545 && bfd_is_abs_section (p->sec->output_section))
5546 {
5547 /* Input section has been discarded, either because
5548 it is a copy of a linkonce section or due to
5549 linker script /DISCARD/, so we'll be discarding
5550 the relocs too. */
5551 }
5552 else if (htab->is_vxworks
5553 && strcmp (p->sec->output_section->name,
5554 ".tls_vars") == 0)
5555 {
5556 /* Relocations in vxworks .tls_vars sections are
5557 handled specially by the loader. */
5558 }
5559 else if (p->count != 0)
5560 {
5561 asection *sreloc = elf_section_data (p->sec)->sreloc;
5562 if (p->ifunc)
5563 sreloc = htab->elf.irelplt;
5564 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5565 if ((p->sec->output_section->flags
5566 & (SEC_READONLY | SEC_ALLOC))
5567 == (SEC_READONLY | SEC_ALLOC))
5568 {
5569 info->flags |= DF_TEXTREL;
5570 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
5571 p->sec->owner, p->sec);
5572 }
5573 }
5574 }
5575 }
5576
5577 local_got = elf_local_got_refcounts (ibfd);
5578 if (!local_got)
5579 continue;
5580
5581 symtab_hdr = &elf_symtab_hdr (ibfd);
5582 locsymcount = symtab_hdr->sh_info;
5583 end_local_got = local_got + locsymcount;
5584 local_plt = (struct plt_entry **) end_local_got;
5585 end_local_plt = local_plt + locsymcount;
5586 lgot_masks = (char *) end_local_plt;
5587
5588 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5589 if (*local_got > 0)
5590 {
5591 unsigned int need;
5592 if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
5593 htab->tlsld_got.refcount += 1;
5594 need = got_entries_needed (*lgot_masks);
5595 if (need == 0)
5596 *local_got = (bfd_vma) -1;
5597 else
5598 {
5599 *local_got = allocate_got (htab, need);
5600 if (bfd_link_pic (info)
5601 && !((*lgot_masks & TLS_TLS) != 0
5602 && bfd_link_executable (info)))
5603 {
5604 asection *srel;
5605
5606 need *= sizeof (Elf32_External_Rela) / 4;
5607 srel = htab->elf.srelgot;
5608 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
5609 srel = htab->elf.irelplt;
5610 srel->size += need;
5611 }
5612 }
5613 }
5614 else
5615 *local_got = (bfd_vma) -1;
5616
5617 if (htab->is_vxworks)
5618 continue;
5619
5620 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5621 lgot_masks = (char *) end_local_plt;
5622 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
5623 {
5624 struct plt_entry *ent;
5625 bfd_boolean doneone = FALSE;
5626 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
5627
5628 for (ent = *local_plt; ent != NULL; ent = ent->next)
5629 if (ent->plt.refcount > 0)
5630 {
5631 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
5632 s = htab->elf.iplt;
5633 else if (htab->can_convert_all_inline_plt
5634 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
5635 {
5636 ent->plt.offset = (bfd_vma) -1;
5637 continue;
5638 }
5639 else
5640 s = htab->pltlocal;
5641
5642 if (!doneone)
5643 {
5644 plt_offset = s->size;
5645 s->size += 4;
5646 }
5647 ent->plt.offset = plt_offset;
5648
5649 if (s != htab->pltlocal && (!doneone || bfd_link_pic (info)))
5650 {
5651 s = htab->glink;
5652 glink_offset = s->size;
5653 s->size += GLINK_ENTRY_SIZE (htab, NULL);
5654 }
5655 ent->glink_offset = glink_offset;
5656
5657 if (!doneone)
5658 {
5659 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
5660 {
5661 s = htab->elf.irelplt;
5662 s->size += sizeof (Elf32_External_Rela);
5663 }
5664 else if (bfd_link_pic (info))
5665 {
5666 s = htab->relpltlocal;
5667 s->size += sizeof (Elf32_External_Rela);
5668 }
5669 doneone = TRUE;
5670 }
5671 }
5672 else
5673 ent->plt.offset = (bfd_vma) -1;
5674 }
5675 }
5676
5677 /* Allocate space for global sym dynamic relocs. */
5678 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5679
5680 if (htab->tlsld_got.refcount > 0)
5681 {
5682 htab->tlsld_got.offset = allocate_got (htab, 8);
5683 if (bfd_link_dll (info))
5684 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
5685 }
5686 else
5687 htab->tlsld_got.offset = (bfd_vma) -1;
5688
5689 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
5690 {
5691 unsigned int g_o_t = 32768;
5692
5693 /* If we haven't allocated the header, do so now. When we get here,
5694 for old plt/got the got size will be 0 to 32764 (not allocated),
5695 or 32780 to 65536 (header allocated). For new plt/got, the
5696 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5697 if (htab->elf.sgot->size <= 32768)
5698 {
5699 g_o_t = htab->elf.sgot->size;
5700 if (htab->plt_type == PLT_OLD)
5701 g_o_t += 4;
5702 htab->elf.sgot->size += htab->got_header_size;
5703 }
5704
5705 htab->elf.hgot->root.u.def.value = g_o_t;
5706 }
5707 if (bfd_link_pic (info))
5708 {
5709 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5710
5711 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5712 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5713 }
5714 if (info->emitrelocations)
5715 {
5716 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5717
5718 if (sda != NULL && sda->ref_regular)
5719 sda->root.u.def.section->flags |= SEC_KEEP;
5720 sda = htab->sdata[1].sym;
5721 if (sda != NULL && sda->ref_regular)
5722 sda->root.u.def.section->flags |= SEC_KEEP;
5723 }
5724
5725 if (htab->glink != NULL
5726 && htab->glink->size != 0
5727 && htab->elf.dynamic_sections_created)
5728 {
5729 htab->glink_pltresolve = htab->glink->size;
5730 /* Space for the branch table. */
5731 htab->glink->size
5732 += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
5733 /* Pad out to align the start of PLTresolve. */
5734 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
5735 ? 63 : 15);
5736 htab->glink->size += GLINK_PLTRESOLVE;
5737
5738 if (htab->params->emit_stub_syms)
5739 {
5740 struct elf_link_hash_entry *sh;
5741 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5742 TRUE, FALSE, FALSE);
5743 if (sh == NULL)
5744 return FALSE;
5745 if (sh->root.type == bfd_link_hash_new)
5746 {
5747 sh->root.type = bfd_link_hash_defined;
5748 sh->root.u.def.section = htab->glink;
5749 sh->root.u.def.value = htab->glink_pltresolve;
5750 sh->ref_regular = 1;
5751 sh->def_regular = 1;
5752 sh->ref_regular_nonweak = 1;
5753 sh->forced_local = 1;
5754 sh->non_elf = 0;
5755 sh->root.linker_def = 1;
5756 }
5757 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5758 TRUE, FALSE, FALSE);
5759 if (sh == NULL)
5760 return FALSE;
5761 if (sh->root.type == bfd_link_hash_new)
5762 {
5763 sh->root.type = bfd_link_hash_defined;
5764 sh->root.u.def.section = htab->glink;
5765 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5766 sh->ref_regular = 1;
5767 sh->def_regular = 1;
5768 sh->ref_regular_nonweak = 1;
5769 sh->forced_local = 1;
5770 sh->non_elf = 0;
5771 sh->root.linker_def = 1;
5772 }
5773 }
5774 }
5775
5776 if (htab->glink != NULL
5777 && htab->glink->size != 0
5778 && htab->glink_eh_frame != NULL
5779 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
5780 && _bfd_elf_eh_frame_present (info))
5781 {
5782 s = htab->glink_eh_frame;
5783 s->size = sizeof (glink_eh_frame_cie) + 20;
5784 if (bfd_link_pic (info))
5785 {
5786 s->size += 4;
5787 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
5788 s->size += 4;
5789 }
5790 }
5791
5792 /* We've now determined the sizes of the various dynamic sections.
5793 Allocate memory for them. */
5794 relocs = FALSE;
5795 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5796 {
5797 bfd_boolean strip_section = TRUE;
5798
5799 if ((s->flags & SEC_LINKER_CREATED) == 0)
5800 continue;
5801
5802 if (s == htab->elf.splt
5803 || s == htab->elf.sgot)
5804 {
5805 /* We'd like to strip these sections if they aren't needed, but if
5806 we've exported dynamic symbols from them we must leave them.
5807 It's too late to tell BFD to get rid of the symbols. */
5808 if (htab->elf.hplt != NULL)
5809 strip_section = FALSE;
5810 /* Strip this section if we don't need it; see the
5811 comment below. */
5812 }
5813 else if (s == htab->elf.iplt
5814 || s == htab->pltlocal
5815 || s == htab->glink
5816 || s == htab->glink_eh_frame
5817 || s == htab->elf.sgotplt
5818 || s == htab->sbss
5819 || s == htab->elf.sdynbss
5820 || s == htab->elf.sdynrelro
5821 || s == htab->dynsbss)
5822 {
5823 /* Strip these too. */
5824 }
5825 else if (s == htab->sdata[0].section
5826 || s == htab->sdata[1].section)
5827 {
5828 strip_section = (s->flags & SEC_KEEP) == 0;
5829 }
5830 else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
5831 {
5832 if (s->size != 0)
5833 {
5834 /* Remember whether there are any relocation sections. */
5835 relocs = TRUE;
5836
5837 /* We use the reloc_count field as a counter if we need
5838 to copy relocs into the output file. */
5839 s->reloc_count = 0;
5840 }
5841 }
5842 else
5843 {
5844 /* It's not one of our sections, so don't allocate space. */
5845 continue;
5846 }
5847
5848 if (s->size == 0 && strip_section)
5849 {
5850 /* If we don't need this section, strip it from the
5851 output file. This is mostly to handle .rela.bss and
5852 .rela.plt. We must create both sections in
5853 create_dynamic_sections, because they must be created
5854 before the linker maps input sections to output
5855 sections. The linker does that before
5856 adjust_dynamic_symbol is called, and it is that
5857 function which decides whether anything needs to go
5858 into these sections. */
5859 s->flags |= SEC_EXCLUDE;
5860 continue;
5861 }
5862
5863 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5864 continue;
5865
5866 /* Allocate memory for the section contents. */
5867 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5868 if (s->contents == NULL)
5869 return FALSE;
5870 }
5871
5872 if (htab->elf.dynamic_sections_created)
5873 {
5874 /* Add some entries to the .dynamic section. We fill in the
5875 values later, in ppc_elf_finish_dynamic_sections, but we
5876 must add the entries now so that we get the correct size for
5877 the .dynamic section. The DT_DEBUG entry is filled in by the
5878 dynamic linker and used by the debugger. */
5879 #define add_dynamic_entry(TAG, VAL) \
5880 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5881
5882 if (bfd_link_executable (info))
5883 {
5884 if (!add_dynamic_entry (DT_DEBUG, 0))
5885 return FALSE;
5886 }
5887
5888 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
5889 {
5890 if (!add_dynamic_entry (DT_PLTGOT, 0)
5891 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5892 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5893 || !add_dynamic_entry (DT_JMPREL, 0))
5894 return FALSE;
5895 }
5896
5897 if (htab->plt_type == PLT_NEW
5898 && htab->glink != NULL
5899 && htab->glink->size != 0)
5900 {
5901 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5902 return FALSE;
5903 if (!htab->params->no_tls_get_addr_opt
5904 && htab->tls_get_addr != NULL
5905 && htab->tls_get_addr->plt.plist != NULL
5906 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
5907 return FALSE;
5908 }
5909
5910 if (relocs)
5911 {
5912 if (!add_dynamic_entry (DT_RELA, 0)
5913 || !add_dynamic_entry (DT_RELASZ, 0)
5914 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5915 return FALSE;
5916 }
5917
5918 /* If any dynamic relocs apply to a read-only section, then we
5919 need a DT_TEXTREL entry. */
5920 if ((info->flags & DF_TEXTREL) == 0)
5921 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5922 info);
5923
5924 if ((info->flags & DF_TEXTREL) != 0)
5925 {
5926 if (!add_dynamic_entry (DT_TEXTREL, 0))
5927 return FALSE;
5928 }
5929 if (htab->is_vxworks
5930 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5931 return FALSE;
5932 }
5933 #undef add_dynamic_entry
5934
5935 if (htab->glink_eh_frame != NULL
5936 && htab->glink_eh_frame->contents != NULL)
5937 {
5938 unsigned char *p = htab->glink_eh_frame->contents;
5939 bfd_vma val;
5940
5941 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
5942 /* CIE length (rewrite in case little-endian). */
5943 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
5944 p += sizeof (glink_eh_frame_cie);
5945 /* FDE length. */
5946 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
5947 bfd_put_32 (htab->elf.dynobj, val, p);
5948 p += 4;
5949 /* CIE pointer. */
5950 val = p - htab->glink_eh_frame->contents;
5951 bfd_put_32 (htab->elf.dynobj, val, p);
5952 p += 4;
5953 /* Offset to .glink. Set later. */
5954 p += 4;
5955 /* .glink size. */
5956 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
5957 p += 4;
5958 /* Augmentation. */
5959 p += 1;
5960
5961 if (bfd_link_pic (info)
5962 && htab->elf.dynamic_sections_created)
5963 {
5964 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
5965 if (adv < 64)
5966 *p++ = DW_CFA_advance_loc + adv;
5967 else if (adv < 256)
5968 {
5969 *p++ = DW_CFA_advance_loc1;
5970 *p++ = adv;
5971 }
5972 else if (adv < 65536)
5973 {
5974 *p++ = DW_CFA_advance_loc2;
5975 bfd_put_16 (htab->elf.dynobj, adv, p);
5976 p += 2;
5977 }
5978 else
5979 {
5980 *p++ = DW_CFA_advance_loc4;
5981 bfd_put_32 (htab->elf.dynobj, adv, p);
5982 p += 4;
5983 }
5984 *p++ = DW_CFA_register;
5985 *p++ = 65;
5986 p++;
5987 *p++ = DW_CFA_advance_loc + 4;
5988 *p++ = DW_CFA_restore_extended;
5989 *p++ = 65;
5990 }
5991 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
5992 == htab->glink_eh_frame->size);
5993 }
5994
5995 return TRUE;
5996 }
5997
5998 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
5999 if it looks like nothing is using them. */
6000
6001 static void
6002 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6003 {
6004 struct elf_link_hash_entry *sda = lsect->sym;
6005
6006 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6007 {
6008 asection *s;
6009
6010 s = bfd_get_section_by_name (output_bfd, lsect->name);
6011 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6012 {
6013 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6014 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6015 {
6016 sda->def_regular = 0;
6017 /* This is somewhat magic. See elf_link_output_extsym. */
6018 sda->ref_dynamic = 1;
6019 sda->forced_local = 0;
6020 }
6021 }
6022 }
6023 }
6024
6025 void
6026 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6027 {
6028 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6029
6030 if (htab != NULL)
6031 {
6032 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6033 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6034 }
6035 }
6036
6037
6038 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6039
6040 static bfd_boolean
6041 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6042 {
6043 if (h->plt.plist != NULL
6044 && !h->def_regular
6045 && (!h->pointer_equality_needed
6046 || !h->ref_regular_nonweak))
6047 return FALSE;
6048
6049 return _bfd_elf_hash_symbol (h);
6050 }
6051
6052 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6054
6055 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6056 used for some functions that are allowed to break the ABI). */
6057 static const int shared_stub_entry[] =
6058 {
6059 0x7c0802a6, /* mflr 0 */
6060 0x429f0005, /* bcl 20, 31, .Lxxx */
6061 0x7d8802a6, /* mflr 12 */
6062 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6063 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6064 0x7c0803a6, /* mtlr 0 */
6065 0x7d8903a6, /* mtctr 12 */
6066 0x4e800420, /* bctr */
6067 };
6068
6069 static const int stub_entry[] =
6070 {
6071 0x3d800000, /* lis 12,xxx@ha */
6072 0x398c0000, /* addi 12,12,xxx@l */
6073 0x7d8903a6, /* mtctr 12 */
6074 0x4e800420, /* bctr */
6075 };
6076
6077 struct ppc_elf_relax_info
6078 {
6079 unsigned int workaround_size;
6080 unsigned int picfixup_size;
6081 };
6082
6083 /* This function implements long branch trampolines, and the ppc476
6084 icache bug workaround. Any section needing trampolines or patch
6085 space for the workaround has its size extended so that we can
6086 add trampolines at the end of the section. */
6087
6088 static bfd_boolean
6089 ppc_elf_relax_section (bfd *abfd,
6090 asection *isec,
6091 struct bfd_link_info *link_info,
6092 bfd_boolean *again)
6093 {
6094 struct one_branch_fixup
6095 {
6096 struct one_branch_fixup *next;
6097 asection *tsec;
6098 /* Final link, can use the symbol offset. For a
6099 relocatable link we use the symbol's index. */
6100 bfd_vma toff;
6101 bfd_vma trampoff;
6102 };
6103
6104 Elf_Internal_Shdr *symtab_hdr;
6105 bfd_byte *contents = NULL;
6106 Elf_Internal_Sym *isymbuf = NULL;
6107 Elf_Internal_Rela *internal_relocs = NULL;
6108 Elf_Internal_Rela *irel, *irelend = NULL;
6109 struct one_branch_fixup *branch_fixups = NULL;
6110 struct ppc_elf_relax_info *relax_info = NULL;
6111 unsigned changes = 0;
6112 bfd_boolean workaround_change;
6113 struct ppc_elf_link_hash_table *htab;
6114 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6115 asection *got2;
6116 bfd_boolean maybe_pasted;
6117
6118 *again = FALSE;
6119
6120 /* No need to do anything with non-alloc or non-code sections. */
6121 if ((isec->flags & SEC_ALLOC) == 0
6122 || (isec->flags & SEC_CODE) == 0
6123 || (isec->flags & SEC_LINKER_CREATED) != 0
6124 || isec->size < 4)
6125 return TRUE;
6126
6127 /* We cannot represent the required PIC relocs in the output, so don't
6128 do anything. The linker doesn't support mixing -shared and -r
6129 anyway. */
6130 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6131 return TRUE;
6132
6133 htab = ppc_elf_hash_table (link_info);
6134 if (htab == NULL)
6135 return TRUE;
6136
6137 isec->size = (isec->size + 3) & -4;
6138 if (isec->rawsize == 0)
6139 isec->rawsize = isec->size;
6140 trampbase = isec->size;
6141
6142 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6143 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6144 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6145
6146 if (htab->params->ppc476_workaround
6147 || htab->params->pic_fixup > 0)
6148 {
6149 if (elf_section_data (isec)->sec_info == NULL)
6150 {
6151 elf_section_data (isec)->sec_info
6152 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6153 if (elf_section_data (isec)->sec_info == NULL)
6154 return FALSE;
6155 }
6156 relax_info = elf_section_data (isec)->sec_info;
6157 trampbase -= relax_info->workaround_size;
6158 }
6159
6160 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6161 || strcmp (isec->output_section->name, ".fini") == 0);
6162 /* Space for a branch around any trampolines. */
6163 trampoff = trampbase;
6164 if (maybe_pasted && trampbase == isec->rawsize)
6165 trampoff += 4;
6166
6167 symtab_hdr = &elf_symtab_hdr (abfd);
6168 picfixup_size = 0;
6169 if (htab->params->branch_trampolines
6170 || htab->params->pic_fixup > 0)
6171 {
6172 /* Get a copy of the native relocations. */
6173 if (isec->reloc_count != 0)
6174 {
6175 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6176 link_info->keep_memory);
6177 if (internal_relocs == NULL)
6178 goto error_return;
6179 }
6180
6181 got2 = bfd_get_section_by_name (abfd, ".got2");
6182
6183 irelend = internal_relocs + isec->reloc_count;
6184 for (irel = internal_relocs; irel < irelend; irel++)
6185 {
6186 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6187 bfd_vma toff, roff;
6188 asection *tsec;
6189 struct one_branch_fixup *f;
6190 size_t insn_offset = 0;
6191 bfd_vma max_branch_offset = 0, val;
6192 bfd_byte *hit_addr;
6193 unsigned long t0;
6194 struct elf_link_hash_entry *h;
6195 Elf_Internal_Sym *isym;
6196 struct plt_entry **plist;
6197 unsigned char sym_type;
6198
6199 switch (r_type)
6200 {
6201 case R_PPC_REL24:
6202 case R_PPC_LOCAL24PC:
6203 case R_PPC_PLTREL24:
6204 case R_PPC_PLTCALL:
6205 max_branch_offset = 1 << 25;
6206 break;
6207
6208 case R_PPC_REL14:
6209 case R_PPC_REL14_BRTAKEN:
6210 case R_PPC_REL14_BRNTAKEN:
6211 max_branch_offset = 1 << 15;
6212 break;
6213
6214 case R_PPC_ADDR16_HA:
6215 if (htab->params->pic_fixup > 0)
6216 break;
6217 continue;
6218
6219 default:
6220 continue;
6221 }
6222
6223 /* Get the value of the symbol referred to by the reloc. */
6224 if (!get_sym_h (&h, &isym, &tsec, NULL, &isymbuf,
6225 ELF32_R_SYM (irel->r_info), abfd))
6226 goto error_return;
6227
6228 if (isym != NULL)
6229 {
6230 if (tsec != NULL)
6231 ;
6232 else if (isym->st_shndx == SHN_ABS)
6233 tsec = bfd_abs_section_ptr;
6234 else
6235 continue;
6236
6237 toff = isym->st_value;
6238 sym_type = ELF_ST_TYPE (isym->st_info);
6239 }
6240 else
6241 {
6242 if (tsec != NULL)
6243 toff = h->root.u.def.value;
6244 else if (h->root.type == bfd_link_hash_undefined
6245 || h->root.type == bfd_link_hash_undefweak)
6246 {
6247 unsigned long indx;
6248
6249 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6250 tsec = bfd_und_section_ptr;
6251 toff = bfd_link_relocatable (link_info) ? indx : 0;
6252 }
6253 else
6254 continue;
6255
6256 /* If this branch is to __tls_get_addr then we may later
6257 optimise away the call. We won't be needing a long-
6258 branch stub in that case. */
6259 if (bfd_link_executable (link_info)
6260 && h == htab->tls_get_addr
6261 && irel != internal_relocs)
6262 {
6263 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6264 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6265 unsigned int tls_mask = 0;
6266
6267 /* The previous reloc should be one of R_PPC_TLSGD or
6268 R_PPC_TLSLD, or for older object files, a reloc
6269 on the __tls_get_addr arg setup insn. Get tls
6270 mask bits from the symbol on that reloc. */
6271 if (t_symndx < symtab_hdr->sh_info)
6272 {
6273 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6274
6275 if (local_got_offsets != NULL)
6276 {
6277 struct plt_entry **local_plt = (struct plt_entry **)
6278 (local_got_offsets + symtab_hdr->sh_info);
6279 char *lgot_masks = (char *)
6280 (local_plt + symtab_hdr->sh_info);
6281 tls_mask = lgot_masks[t_symndx];
6282 }
6283 }
6284 else
6285 {
6286 struct elf_link_hash_entry *th
6287 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6288
6289 while (th->root.type == bfd_link_hash_indirect
6290 || th->root.type == bfd_link_hash_warning)
6291 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6292
6293 tls_mask
6294 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6295 }
6296
6297 /* The mask bits tell us if the call will be
6298 optimised away. */
6299 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6300 && (t_rtype == R_PPC_TLSGD
6301 || t_rtype == R_PPC_GOT_TLSGD16
6302 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6303 continue;
6304 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6305 && (t_rtype == R_PPC_TLSLD
6306 || t_rtype == R_PPC_GOT_TLSLD16
6307 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6308 continue;
6309 }
6310
6311 sym_type = h->type;
6312 }
6313
6314 if (r_type == R_PPC_ADDR16_HA)
6315 {
6316 if (h != NULL
6317 && !h->def_regular
6318 && h->protected_def
6319 && ppc_elf_hash_entry (h)->has_addr16_ha
6320 && ppc_elf_hash_entry (h)->has_addr16_lo)
6321 picfixup_size += 12;
6322 continue;
6323 }
6324
6325 /* The condition here under which we call find_plt_ent must
6326 match that in relocate_section. If we call find_plt_ent here
6327 but not in relocate_section, or vice versa, then the branch
6328 destination used here may be incorrect. */
6329 plist = NULL;
6330 if (h != NULL)
6331 {
6332 /* We know is_branch_reloc (r_type) is true. */
6333 if (h->type == STT_GNU_IFUNC
6334 || r_type == R_PPC_PLTREL24)
6335 plist = &h->plt.plist;
6336 }
6337 else if (sym_type == STT_GNU_IFUNC
6338 && elf_local_got_offsets (abfd) != NULL)
6339 {
6340 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6341 struct plt_entry **local_plt = (struct plt_entry **)
6342 (local_got_offsets + symtab_hdr->sh_info);
6343 plist = local_plt + ELF32_R_SYM (irel->r_info);
6344 }
6345 if (plist != NULL)
6346 {
6347 bfd_vma addend = 0;
6348 struct plt_entry *ent;
6349
6350 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
6351 addend = irel->r_addend;
6352 ent = find_plt_ent (plist, got2, addend);
6353 if (ent != NULL)
6354 {
6355 if (htab->plt_type == PLT_NEW
6356 || h == NULL
6357 || !htab->elf.dynamic_sections_created
6358 || h->dynindx == -1)
6359 {
6360 tsec = htab->glink;
6361 toff = ent->glink_offset;
6362 }
6363 else
6364 {
6365 tsec = htab->elf.splt;
6366 toff = ent->plt.offset;
6367 }
6368 }
6369 }
6370
6371 /* If the branch and target are in the same section, you have
6372 no hope of adding stubs. We'll error out later should the
6373 branch overflow. */
6374 if (tsec == isec)
6375 continue;
6376
6377 /* toff is used for the symbol index when the symbol is
6378 undefined and we're doing a relocatable link, so we can't
6379 support addends. It would be possible to do so by
6380 putting the addend in one_branch_fixup but addends on
6381 branches are rare so it hardly seems worth supporting. */
6382 if (bfd_link_relocatable (link_info)
6383 && tsec == bfd_und_section_ptr
6384 && r_type != R_PPC_PLTREL24
6385 && irel->r_addend != 0)
6386 continue;
6387
6388 /* There probably isn't any reason to handle symbols in
6389 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6390 attribute for a code section, and we are only looking at
6391 branches. However, implement it correctly here as a
6392 reference for other target relax_section functions. */
6393 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6394 {
6395 /* At this stage in linking, no SEC_MERGE symbol has been
6396 adjusted, so all references to such symbols need to be
6397 passed through _bfd_merged_section_offset. (Later, in
6398 relocate_section, all SEC_MERGE symbols *except* for
6399 section symbols have been adjusted.)
6400
6401 gas may reduce relocations against symbols in SEC_MERGE
6402 sections to a relocation against the section symbol when
6403 the original addend was zero. When the reloc is against
6404 a section symbol we should include the addend in the
6405 offset passed to _bfd_merged_section_offset, since the
6406 location of interest is the original symbol. On the
6407 other hand, an access to "sym+addend" where "sym" is not
6408 a section symbol should not include the addend; Such an
6409 access is presumed to be an offset from "sym"; The
6410 location of interest is just "sym". */
6411 if (sym_type == STT_SECTION
6412 && r_type != R_PPC_PLTREL24)
6413 toff += irel->r_addend;
6414
6415 toff
6416 = _bfd_merged_section_offset (abfd, &tsec,
6417 elf_section_data (tsec)->sec_info,
6418 toff);
6419
6420 if (sym_type != STT_SECTION
6421 && r_type != R_PPC_PLTREL24)
6422 toff += irel->r_addend;
6423 }
6424 /* PLTREL24 addends are special. */
6425 else if (r_type != R_PPC_PLTREL24)
6426 toff += irel->r_addend;
6427
6428 /* Attempted -shared link of non-pic code loses. */
6429 if ((!bfd_link_relocatable (link_info)
6430 && tsec == bfd_und_section_ptr)
6431 || tsec->output_section == NULL
6432 || (tsec->owner != NULL
6433 && (tsec->owner->flags & BFD_PLUGIN) != 0))
6434 continue;
6435
6436 roff = irel->r_offset;
6437
6438 /* Avoid creating a lot of unnecessary fixups when
6439 relocatable if the output section size is such that a
6440 fixup can be created at final link.
6441 The max_branch_offset adjustment allows for some number
6442 of other fixups being needed at final link. */
6443 if (bfd_link_relocatable (link_info)
6444 && (isec->output_section->rawsize - (isec->output_offset + roff)
6445 < max_branch_offset - (max_branch_offset >> 4)))
6446 continue;
6447
6448 /* If the branch is in range, no need to do anything. */
6449 if (tsec != bfd_und_section_ptr
6450 && (!bfd_link_relocatable (link_info)
6451 /* A relocatable link may have sections moved during
6452 final link, so do not presume they remain in range. */
6453 || tsec->output_section == isec->output_section))
6454 {
6455 bfd_vma symaddr, reladdr;
6456
6457 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6458 reladdr = isec->output_section->vma + isec->output_offset + roff;
6459 if (symaddr - reladdr + max_branch_offset
6460 < 2 * max_branch_offset)
6461 continue;
6462 }
6463
6464 /* Look for an existing fixup to this address. */
6465 for (f = branch_fixups; f ; f = f->next)
6466 if (f->tsec == tsec && f->toff == toff)
6467 break;
6468
6469 if (f == NULL)
6470 {
6471 size_t size;
6472 unsigned long stub_rtype;
6473
6474 val = trampoff - roff;
6475 if (val >= max_branch_offset)
6476 /* Oh dear, we can't reach a trampoline. Don't try to add
6477 one. We'll report an error later. */
6478 continue;
6479
6480 if (bfd_link_pic (link_info))
6481 {
6482 size = 4 * ARRAY_SIZE (shared_stub_entry);
6483 insn_offset = 12;
6484 }
6485 else
6486 {
6487 size = 4 * ARRAY_SIZE (stub_entry);
6488 insn_offset = 0;
6489 }
6490 stub_rtype = R_PPC_RELAX;
6491 if (tsec == htab->elf.splt
6492 || tsec == htab->glink)
6493 {
6494 stub_rtype = R_PPC_RELAX_PLT;
6495 if (r_type == R_PPC_PLTREL24)
6496 stub_rtype = R_PPC_RELAX_PLTREL24;
6497 }
6498
6499 /* Hijack the old relocation. Since we need two
6500 relocations for this use a "composite" reloc. */
6501 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6502 stub_rtype);
6503 irel->r_offset = trampoff + insn_offset;
6504 if (r_type == R_PPC_PLTREL24
6505 && stub_rtype != R_PPC_RELAX_PLTREL24)
6506 irel->r_addend = 0;
6507
6508 /* Record the fixup so we don't do it again this section. */
6509 f = bfd_malloc (sizeof (*f));
6510 f->next = branch_fixups;
6511 f->tsec = tsec;
6512 f->toff = toff;
6513 f->trampoff = trampoff;
6514 branch_fixups = f;
6515
6516 trampoff += size;
6517 changes++;
6518 }
6519 else
6520 {
6521 val = f->trampoff - roff;
6522 if (val >= max_branch_offset)
6523 continue;
6524
6525 /* Nop out the reloc, since we're finalizing things here. */
6526 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6527 }
6528
6529 /* Get the section contents. */
6530 if (contents == NULL)
6531 {
6532 /* Get cached copy if it exists. */
6533 if (elf_section_data (isec)->this_hdr.contents != NULL)
6534 contents = elf_section_data (isec)->this_hdr.contents;
6535 /* Go get them off disk. */
6536 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6537 goto error_return;
6538 }
6539
6540 /* Fix up the existing branch to hit the trampoline. */
6541 hit_addr = contents + roff;
6542 switch (r_type)
6543 {
6544 case R_PPC_REL24:
6545 case R_PPC_LOCAL24PC:
6546 case R_PPC_PLTREL24:
6547 t0 = bfd_get_32 (abfd, hit_addr);
6548 t0 &= ~0x3fffffc;
6549 t0 |= val & 0x3fffffc;
6550 bfd_put_32 (abfd, t0, hit_addr);
6551 break;
6552
6553 case R_PPC_REL14:
6554 case R_PPC_REL14_BRTAKEN:
6555 case R_PPC_REL14_BRNTAKEN:
6556 t0 = bfd_get_32 (abfd, hit_addr);
6557 t0 &= ~0xfffc;
6558 t0 |= val & 0xfffc;
6559 bfd_put_32 (abfd, t0, hit_addr);
6560 break;
6561 }
6562 }
6563
6564 while (branch_fixups != NULL)
6565 {
6566 struct one_branch_fixup *f = branch_fixups;
6567 branch_fixups = branch_fixups->next;
6568 free (f);
6569 }
6570 }
6571
6572 workaround_change = FALSE;
6573 newsize = trampoff;
6574 if (htab->params->ppc476_workaround
6575 && (!bfd_link_relocatable (link_info)
6576 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
6577 {
6578 bfd_vma addr, end_addr;
6579 unsigned int crossings;
6580 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
6581
6582 addr = isec->output_section->vma + isec->output_offset;
6583 end_addr = addr + trampoff;
6584 addr &= -pagesize;
6585 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
6586 if (crossings != 0)
6587 {
6588 /* Keep space aligned, to ensure the patch code itself does
6589 not cross a page. Don't decrease size calculated on a
6590 previous pass as otherwise we might never settle on a layout. */
6591 newsize = 15 - ((end_addr - 1) & 15);
6592 newsize += crossings * 16;
6593 if (relax_info->workaround_size < newsize)
6594 {
6595 relax_info->workaround_size = newsize;
6596 workaround_change = TRUE;
6597 }
6598 /* Ensure relocate_section is called. */
6599 isec->flags |= SEC_RELOC;
6600 }
6601 newsize = trampoff + relax_info->workaround_size;
6602 }
6603
6604 if (htab->params->pic_fixup > 0)
6605 {
6606 picfixup_size -= relax_info->picfixup_size;
6607 if (picfixup_size != 0)
6608 relax_info->picfixup_size += picfixup_size;
6609 newsize += relax_info->picfixup_size;
6610 }
6611
6612 if (changes != 0 || picfixup_size != 0 || workaround_change)
6613 isec->size = newsize;
6614
6615 if (isymbuf != NULL
6616 && symtab_hdr->contents != (unsigned char *) isymbuf)
6617 {
6618 if (! link_info->keep_memory)
6619 free (isymbuf);
6620 else
6621 {
6622 /* Cache the symbols for elf_link_input_bfd. */
6623 symtab_hdr->contents = (unsigned char *) isymbuf;
6624 }
6625 }
6626
6627 if (contents != NULL
6628 && elf_section_data (isec)->this_hdr.contents != contents)
6629 {
6630 if (!changes && !link_info->keep_memory)
6631 free (contents);
6632 else
6633 {
6634 /* Cache the section contents for elf_link_input_bfd. */
6635 elf_section_data (isec)->this_hdr.contents = contents;
6636 }
6637 }
6638
6639 changes += picfixup_size;
6640 if (changes != 0)
6641 {
6642 /* Append sufficient NOP relocs so we can write out relocation
6643 information for the trampolines. */
6644 Elf_Internal_Shdr *rel_hdr;
6645 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6646 * sizeof (*new_relocs));
6647 unsigned ix;
6648
6649 if (!new_relocs)
6650 goto error_return;
6651 memcpy (new_relocs, internal_relocs,
6652 isec->reloc_count * sizeof (*new_relocs));
6653 for (ix = changes; ix--;)
6654 {
6655 irel = new_relocs + ix + isec->reloc_count;
6656
6657 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6658 }
6659 if (internal_relocs != elf_section_data (isec)->relocs)
6660 free (internal_relocs);
6661 elf_section_data (isec)->relocs = new_relocs;
6662 isec->reloc_count += changes;
6663 rel_hdr = _bfd_elf_single_rel_hdr (isec);
6664 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
6665 }
6666 else if (internal_relocs != NULL
6667 && elf_section_data (isec)->relocs != internal_relocs)
6668 free (internal_relocs);
6669
6670 *again = changes != 0 || workaround_change;
6671 return TRUE;
6672
6673 error_return:
6674 while (branch_fixups != NULL)
6675 {
6676 struct one_branch_fixup *f = branch_fixups;
6677 branch_fixups = branch_fixups->next;
6678 free (f);
6679 }
6680 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6681 free (isymbuf);
6682 if (contents != NULL
6683 && elf_section_data (isec)->this_hdr.contents != contents)
6684 free (contents);
6685 if (internal_relocs != NULL
6686 && elf_section_data (isec)->relocs != internal_relocs)
6687 free (internal_relocs);
6688 return FALSE;
6689 }
6690
6691 /* What to do when ld finds relocations against symbols defined in
6693 discarded sections. */
6694
6695 static unsigned int
6696 ppc_elf_action_discarded (asection *sec)
6697 {
6698 if (strcmp (".fixup", sec->name) == 0)
6699 return 0;
6700
6701 if (strcmp (".got2", sec->name) == 0)
6702 return 0;
6703
6704 return _bfd_elf_default_action_discarded (sec);
6705 }
6706
6707 /* Fill in the address for a pointer generated in a linker section. */
6709
6710 static bfd_vma
6711 elf_finish_pointer_linker_section (bfd *input_bfd,
6712 elf_linker_section_t *lsect,
6713 struct elf_link_hash_entry *h,
6714 bfd_vma relocation,
6715 const Elf_Internal_Rela *rel)
6716 {
6717 elf_linker_section_pointers_t *linker_section_ptr;
6718
6719 BFD_ASSERT (lsect != NULL);
6720
6721 if (h != NULL)
6722 {
6723 /* Handle global symbol. */
6724 struct ppc_elf_link_hash_entry *eh;
6725
6726 eh = (struct ppc_elf_link_hash_entry *) h;
6727 BFD_ASSERT (eh->elf.def_regular);
6728 linker_section_ptr = eh->linker_section_pointer;
6729 }
6730 else
6731 {
6732 /* Handle local symbol. */
6733 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6734
6735 BFD_ASSERT (is_ppc_elf (input_bfd));
6736 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6737 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6738 }
6739
6740 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6741 rel->r_addend,
6742 lsect);
6743 BFD_ASSERT (linker_section_ptr != NULL);
6744
6745 /* Offset will always be a multiple of four, so use the bottom bit
6746 as a "written" flag. */
6747 if ((linker_section_ptr->offset & 1) == 0)
6748 {
6749 bfd_put_32 (lsect->section->owner,
6750 relocation + linker_section_ptr->addend,
6751 lsect->section->contents + linker_section_ptr->offset);
6752 linker_section_ptr->offset += 1;
6753 }
6754
6755 relocation = (lsect->section->output_section->vma
6756 + lsect->section->output_offset
6757 + linker_section_ptr->offset - 1
6758 - SYM_VAL (lsect->sym));
6759
6760 #ifdef DEBUG
6761 fprintf (stderr,
6762 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6763 lsect->name, (long) relocation, (long) relocation);
6764 #endif
6765
6766 return relocation;
6767 }
6768
6769 #define PPC_LO(v) ((v) & 0xffff)
6770 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6771 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6772
6773 static void
6774 write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
6775 asection *plt_sec, unsigned char *p,
6776 struct bfd_link_info *info)
6777 {
6778 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6779 bfd *output_bfd = info->output_bfd;
6780 bfd_vma plt;
6781 unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
6782
6783 if (h != NULL
6784 && h == htab->tls_get_addr
6785 && !htab->params->no_tls_get_addr_opt)
6786 {
6787 bfd_put_32 (output_bfd, LWZ_11_3, p);
6788 p += 4;
6789 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
6790 p += 4;
6791 bfd_put_32 (output_bfd, MR_0_3, p);
6792 p += 4;
6793 bfd_put_32 (output_bfd, CMPWI_11_0, p);
6794 p += 4;
6795 bfd_put_32 (output_bfd, ADD_3_12_2, p);
6796 p += 4;
6797 bfd_put_32 (output_bfd, BEQLR, p);
6798 p += 4;
6799 bfd_put_32 (output_bfd, MR_3_0, p);
6800 p += 4;
6801 bfd_put_32 (output_bfd, NOP, p);
6802 p += 4;
6803 }
6804
6805 plt = ((ent->plt.offset & ~1)
6806 + plt_sec->output_section->vma
6807 + plt_sec->output_offset);
6808
6809 if (bfd_link_pic (info))
6810 {
6811 bfd_vma got = 0;
6812
6813 if (ent->addend >= 32768)
6814 got = (ent->addend
6815 + ent->sec->output_section->vma
6816 + ent->sec->output_offset);
6817 else if (htab->elf.hgot != NULL)
6818 got = SYM_VAL (htab->elf.hgot);
6819
6820 plt -= got;
6821
6822 if (plt + 0x8000 < 0x10000)
6823 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6824 else
6825 {
6826 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6827 p += 4;
6828 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6829 }
6830 }
6831 else
6832 {
6833 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6834 p += 4;
6835 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6836 }
6837 p += 4;
6838 bfd_put_32 (output_bfd, MTCTR_11, p);
6839 p += 4;
6840 bfd_put_32 (output_bfd, BCTR, p);
6841 p += 4;
6842 while (p < end)
6843 {
6844 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
6845 p += 4;
6846 }
6847 }
6848
6849 /* Return true if symbol is defined statically. */
6850
6851 static bfd_boolean
6852 is_static_defined (struct elf_link_hash_entry *h)
6853 {
6854 return ((h->root.type == bfd_link_hash_defined
6855 || h->root.type == bfd_link_hash_defweak)
6856 && h->root.u.def.section != NULL
6857 && h->root.u.def.section->output_section != NULL);
6858 }
6859
6860 /* If INSN is an opcode that may be used with an @tls operand, return
6861 the transformed insn for TLS optimisation, otherwise return 0. If
6862 REG is non-zero only match an insn with RB or RA equal to REG. */
6863
6864 unsigned int
6865 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6866 {
6867 unsigned int rtra;
6868
6869 if ((insn & (0x3fu << 26)) != 31 << 26)
6870 return 0;
6871
6872 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6873 rtra = insn & ((1 << 26) - (1 << 16));
6874 else if (((insn >> 16) & 0x1f) == reg)
6875 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6876 else
6877 return 0;
6878
6879 if ((insn & (0x3ff << 1)) == 266 << 1)
6880 /* add -> addi. */
6881 insn = 14 << 26;
6882 else if ((insn & (0x1f << 1)) == 23 << 1
6883 && ((insn & (0x1f << 6)) < 14 << 6
6884 || ((insn & (0x1f << 6)) >= 16 << 6
6885 && (insn & (0x1f << 6)) < 24 << 6)))
6886 /* load and store indexed -> dform. */
6887 insn = (32u | ((insn >> 6) & 0x1f)) << 26;
6888 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6889 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6890 insn = ((58u | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6891 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6892 /* lwax -> lwa. */
6893 insn = (58u << 26) | 2;
6894 else
6895 return 0;
6896 insn |= rtra;
6897 return insn;
6898 }
6899
6900 /* If INSN is an opcode that may be used with an @tprel operand, return
6901 the transformed insn for an undefined weak symbol, ie. with the
6902 thread pointer REG operand removed. Otherwise return 0. */
6903
6904 unsigned int
6905 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
6906 {
6907 if ((insn & (0x1f << 16)) == reg << 16
6908 && ((insn & (0x3fu << 26)) == 14u << 26 /* addi */
6909 || (insn & (0x3fu << 26)) == 15u << 26 /* addis */
6910 || (insn & (0x3fu << 26)) == 32u << 26 /* lwz */
6911 || (insn & (0x3fu << 26)) == 34u << 26 /* lbz */
6912 || (insn & (0x3fu << 26)) == 36u << 26 /* stw */
6913 || (insn & (0x3fu << 26)) == 38u << 26 /* stb */
6914 || (insn & (0x3fu << 26)) == 40u << 26 /* lhz */
6915 || (insn & (0x3fu << 26)) == 42u << 26 /* lha */
6916 || (insn & (0x3fu << 26)) == 44u << 26 /* sth */
6917 || (insn & (0x3fu << 26)) == 46u << 26 /* lmw */
6918 || (insn & (0x3fu << 26)) == 47u << 26 /* stmw */
6919 || (insn & (0x3fu << 26)) == 48u << 26 /* lfs */
6920 || (insn & (0x3fu << 26)) == 50u << 26 /* lfd */
6921 || (insn & (0x3fu << 26)) == 52u << 26 /* stfs */
6922 || (insn & (0x3fu << 26)) == 54u << 26 /* stfd */
6923 || ((insn & (0x3fu << 26)) == 58u << 26 /* lwa,ld,lmd */
6924 && (insn & 3) != 1)
6925 || ((insn & (0x3fu << 26)) == 62u << 26 /* std, stmd */
6926 && ((insn & 3) == 0 || (insn & 3) == 3))))
6927 {
6928 insn &= ~(0x1f << 16);
6929 }
6930 else if ((insn & (0x1f << 21)) == reg << 21
6931 && ((insn & (0x3eu << 26)) == 24u << 26 /* ori, oris */
6932 || (insn & (0x3eu << 26)) == 26u << 26 /* xori,xoris */
6933 || (insn & (0x3eu << 26)) == 28u << 26 /* andi,andis */))
6934 {
6935 insn &= ~(0x1f << 21);
6936 insn |= (insn & (0x1f << 16)) << 5;
6937 if ((insn & (0x3eu << 26)) == 26u << 26 /* xori,xoris */)
6938 insn -= 2 >> 26; /* convert to ori,oris */
6939 }
6940 else
6941 insn = 0;
6942 return insn;
6943 }
6944
6945 static bfd_boolean
6946 is_insn_ds_form (unsigned int insn)
6947 {
6948 return ((insn & (0x3fu << 26)) == 58u << 26 /* ld,ldu,lwa */
6949 || (insn & (0x3fu << 26)) == 62u << 26 /* std,stdu,stq */
6950 || (insn & (0x3fu << 26)) == 57u << 26 /* lfdp */
6951 || (insn & (0x3fu << 26)) == 61u << 26 /* stfdp */);
6952 }
6953
6954 static bfd_boolean
6955 is_insn_dq_form (unsigned int insn)
6956 {
6957 return ((insn & (0x3fu << 26)) == 56u << 26 /* lq */
6958 || ((insn & (0x3fu << 26)) == (61u << 26) /* lxv, stxv */
6959 && (insn & 3) == 1));
6960 }
6961
6962 /* The RELOCATE_SECTION function is called by the ELF backend linker
6963 to handle the relocations for a section.
6964
6965 The relocs are always passed as Rela structures; if the section
6966 actually uses Rel structures, the r_addend field will always be
6967 zero.
6968
6969 This function is responsible for adjust the section contents as
6970 necessary, and (if using Rela relocs and generating a
6971 relocatable output file) adjusting the reloc addend as
6972 necessary.
6973
6974 This function does not have to worry about setting the reloc
6975 address or the reloc symbol index.
6976
6977 LOCAL_SYMS is a pointer to the swapped in local symbols.
6978
6979 LOCAL_SECTIONS is an array giving the section in the input file
6980 corresponding to the st_shndx field of each local symbol.
6981
6982 The global hash table entry for the global symbols can be found
6983 via elf_sym_hashes (input_bfd).
6984
6985 When generating relocatable output, this function must handle
6986 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6987 going to be the section symbol corresponding to the output
6988 section, which means that the addend must be adjusted
6989 accordingly. */
6990
6991 static bfd_boolean
6992 ppc_elf_relocate_section (bfd *output_bfd,
6993 struct bfd_link_info *info,
6994 bfd *input_bfd,
6995 asection *input_section,
6996 bfd_byte *contents,
6997 Elf_Internal_Rela *relocs,
6998 Elf_Internal_Sym *local_syms,
6999 asection **local_sections)
7000 {
7001 Elf_Internal_Shdr *symtab_hdr;
7002 struct elf_link_hash_entry **sym_hashes;
7003 struct ppc_elf_link_hash_table *htab;
7004 Elf_Internal_Rela *rel;
7005 Elf_Internal_Rela *wrel;
7006 Elf_Internal_Rela *relend;
7007 Elf_Internal_Rela outrel;
7008 asection *got2;
7009 bfd_vma *local_got_offsets;
7010 bfd_boolean ret = TRUE;
7011 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7012 bfd_boolean is_vxworks_tls;
7013 unsigned int picfixup_size = 0;
7014 struct ppc_elf_relax_info *relax_info = NULL;
7015
7016 #ifdef DEBUG
7017 _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
7018 "%ld relocations%s",
7019 input_bfd, input_section,
7020 (long) input_section->reloc_count,
7021 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7022 #endif
7023
7024 if (!is_ppc_elf (input_bfd))
7025 {
7026 bfd_set_error (bfd_error_wrong_format);
7027 return FALSE;
7028 }
7029
7030 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7031
7032 /* Initialize howto table if not already done. */
7033 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7034 ppc_elf_howto_init ();
7035
7036 htab = ppc_elf_hash_table (info);
7037 local_got_offsets = elf_local_got_offsets (input_bfd);
7038 symtab_hdr = &elf_symtab_hdr (input_bfd);
7039 sym_hashes = elf_sym_hashes (input_bfd);
7040 /* We have to handle relocations in vxworks .tls_vars sections
7041 specially, because the dynamic loader is 'weird'. */
7042 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7043 && !strcmp (input_section->output_section->name,
7044 ".tls_vars"));
7045 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7046 relax_info = elf_section_data (input_section)->sec_info;
7047 rel = wrel = relocs;
7048 relend = relocs + input_section->reloc_count;
7049 for (; rel < relend; wrel++, rel++)
7050 {
7051 enum elf_ppc_reloc_type r_type;
7052 bfd_vma addend;
7053 bfd_reloc_status_type r;
7054 Elf_Internal_Sym *sym;
7055 asection *sec;
7056 struct elf_link_hash_entry *h;
7057 const char *sym_name;
7058 reloc_howto_type *howto;
7059 unsigned long r_symndx;
7060 bfd_vma relocation;
7061 bfd_vma branch_bit, from;
7062 bfd_boolean unresolved_reloc, save_unresolved_reloc;
7063 bfd_boolean warned;
7064 unsigned int tls_type, tls_mask, tls_gd;
7065 struct plt_entry **ifunc, **plt_list;
7066 struct reloc_howto_struct alt_howto;
7067
7068 again:
7069 r_type = ELF32_R_TYPE (rel->r_info);
7070 sym = NULL;
7071 sec = NULL;
7072 h = NULL;
7073 unresolved_reloc = FALSE;
7074 warned = FALSE;
7075 r_symndx = ELF32_R_SYM (rel->r_info);
7076
7077 if (r_symndx < symtab_hdr->sh_info)
7078 {
7079 sym = local_syms + r_symndx;
7080 sec = local_sections[r_symndx];
7081 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7082
7083 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7084 }
7085 else
7086 {
7087 bfd_boolean ignored;
7088
7089 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7090 r_symndx, symtab_hdr, sym_hashes,
7091 h, sec, relocation,
7092 unresolved_reloc, warned, ignored);
7093
7094 sym_name = h->root.root.string;
7095 }
7096
7097 if (sec != NULL && discarded_section (sec))
7098 {
7099 /* For relocs against symbols from removed linkonce sections,
7100 or sections discarded by a linker script, we just want the
7101 section contents zeroed. Avoid any special processing. */
7102 howto = NULL;
7103 if (r_type < R_PPC_max)
7104 howto = ppc_elf_howto_table[r_type];
7105
7106 _bfd_clear_contents (howto, input_bfd, input_section,
7107 contents, rel->r_offset);
7108 wrel->r_offset = rel->r_offset;
7109 wrel->r_info = 0;
7110 wrel->r_addend = 0;
7111
7112 /* For ld -r, remove relocations in debug sections against
7113 symbols defined in discarded sections. Not done for
7114 non-debug to preserve relocs in .eh_frame which the
7115 eh_frame editing code expects to be present. */
7116 if (bfd_link_relocatable (info)
7117 && (input_section->flags & SEC_DEBUGGING))
7118 wrel--;
7119
7120 continue;
7121 }
7122
7123 if (bfd_link_relocatable (info))
7124 {
7125 if (got2 != NULL
7126 && r_type == R_PPC_PLTREL24
7127 && rel->r_addend != 0)
7128 {
7129 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7130 addend specifies the GOT pointer offset within .got2. */
7131 rel->r_addend += got2->output_offset;
7132 }
7133 if (r_type != R_PPC_RELAX_PLT
7134 && r_type != R_PPC_RELAX_PLTREL24
7135 && r_type != R_PPC_RELAX)
7136 goto copy_reloc;
7137 }
7138
7139 /* TLS optimizations. Replace instruction sequences and relocs
7140 based on information we collected in tls_optimize. We edit
7141 RELOCS so that --emit-relocs will output something sensible
7142 for the final instruction stream. */
7143 tls_mask = 0;
7144 tls_gd = 0;
7145 if (h != NULL)
7146 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7147 else if (local_got_offsets != NULL)
7148 {
7149 struct plt_entry **local_plt;
7150 char *lgot_masks;
7151 local_plt
7152 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7153 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7154 tls_mask = lgot_masks[r_symndx];
7155 }
7156
7157 /* Ensure reloc mapping code below stays sane. */
7158 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7159 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7160 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7161 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7162 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7163 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7164 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7165 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7166 abort ();
7167 switch (r_type)
7168 {
7169 default:
7170 break;
7171
7172 case R_PPC_GOT_TPREL16:
7173 case R_PPC_GOT_TPREL16_LO:
7174 if ((tls_mask & TLS_TLS) != 0
7175 && (tls_mask & TLS_TPREL) == 0)
7176 {
7177 bfd_vma insn;
7178
7179 insn = bfd_get_32 (input_bfd,
7180 contents + rel->r_offset - d_offset);
7181 insn &= 31 << 21;
7182 insn |= 0x3c020000; /* addis 0,2,0 */
7183 bfd_put_32 (input_bfd, insn,
7184 contents + rel->r_offset - d_offset);
7185 r_type = R_PPC_TPREL16_HA;
7186 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7187 }
7188 break;
7189
7190 case R_PPC_TLS:
7191 if ((tls_mask & TLS_TLS) != 0
7192 && (tls_mask & TLS_TPREL) == 0)
7193 {
7194 bfd_vma insn;
7195
7196 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7197 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7198 if (insn == 0)
7199 abort ();
7200 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7201 r_type = R_PPC_TPREL16_LO;
7202 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7203
7204 /* Was PPC_TLS which sits on insn boundary, now
7205 PPC_TPREL16_LO which is at low-order half-word. */
7206 rel->r_offset += d_offset;
7207 }
7208 break;
7209
7210 case R_PPC_GOT_TLSGD16_HI:
7211 case R_PPC_GOT_TLSGD16_HA:
7212 tls_gd = TLS_GDIE;
7213 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7214 goto tls_gdld_hi;
7215 break;
7216
7217 case R_PPC_GOT_TLSLD16_HI:
7218 case R_PPC_GOT_TLSLD16_HA:
7219 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7220 {
7221 tls_gdld_hi:
7222 if ((tls_mask & tls_gd) != 0)
7223 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7224 + R_PPC_GOT_TPREL16);
7225 else
7226 {
7227 rel->r_offset -= d_offset;
7228 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7229 r_type = R_PPC_NONE;
7230 }
7231 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7232 }
7233 break;
7234
7235 case R_PPC_GOT_TLSGD16:
7236 case R_PPC_GOT_TLSGD16_LO:
7237 tls_gd = TLS_GDIE;
7238 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7239 goto tls_ldgd_opt;
7240 break;
7241
7242 case R_PPC_GOT_TLSLD16:
7243 case R_PPC_GOT_TLSLD16_LO:
7244 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7245 {
7246 unsigned int insn1, insn2;
7247 bfd_vma offset;
7248
7249 tls_ldgd_opt:
7250 offset = (bfd_vma) -1;
7251 /* If not using the newer R_PPC_TLSGD/LD to mark
7252 __tls_get_addr calls, we must trust that the call
7253 stays with its arg setup insns, ie. that the next
7254 reloc is the __tls_get_addr call associated with
7255 the current reloc. Edit both insns. */
7256 if (input_section->nomark_tls_get_addr
7257 && rel + 1 < relend
7258 && branch_reloc_hash_match (input_bfd, rel + 1,
7259 htab->tls_get_addr))
7260 offset = rel[1].r_offset;
7261 /* We read the low GOT_TLS insn because we need to keep
7262 the destination reg. It may be something other than
7263 the usual r3, and moved to r3 before the call by
7264 intervening code. */
7265 insn1 = bfd_get_32 (input_bfd,
7266 contents + rel->r_offset - d_offset);
7267 if ((tls_mask & tls_gd) != 0)
7268 {
7269 /* IE */
7270 insn1 &= (0x1f << 21) | (0x1f << 16);
7271 insn1 |= 32u << 26; /* lwz */
7272 if (offset != (bfd_vma) -1)
7273 {
7274 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7275 insn2 = 0x7c631214; /* add 3,3,2 */
7276 bfd_put_32 (input_bfd, insn2, contents + offset);
7277 }
7278 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7279 + R_PPC_GOT_TPREL16);
7280 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7281 }
7282 else
7283 {
7284 /* LE */
7285 insn1 &= 0x1f << 21;
7286 insn1 |= 0x3c020000; /* addis r,2,0 */
7287 if (tls_gd == 0)
7288 {
7289 /* Was an LD reloc. */
7290 for (r_symndx = 0;
7291 r_symndx < symtab_hdr->sh_info;
7292 r_symndx++)
7293 if (local_sections[r_symndx] == sec)
7294 break;
7295 if (r_symndx >= symtab_hdr->sh_info)
7296 r_symndx = STN_UNDEF;
7297 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7298 if (r_symndx != STN_UNDEF)
7299 rel->r_addend -= (local_syms[r_symndx].st_value
7300 + sec->output_offset
7301 + sec->output_section->vma);
7302 }
7303 r_type = R_PPC_TPREL16_HA;
7304 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7305 if (offset != (bfd_vma) -1)
7306 {
7307 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7308 rel[1].r_offset = offset + d_offset;
7309 rel[1].r_addend = rel->r_addend;
7310 insn2 = 0x38630000; /* addi 3,3,0 */
7311 bfd_put_32 (input_bfd, insn2, contents + offset);
7312 }
7313 }
7314 bfd_put_32 (input_bfd, insn1,
7315 contents + rel->r_offset - d_offset);
7316 if (tls_gd == 0)
7317 {
7318 /* We changed the symbol on an LD reloc. Start over
7319 in order to get h, sym, sec etc. right. */
7320 goto again;
7321 }
7322 }
7323 break;
7324
7325 case R_PPC_TLSGD:
7326 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7327 && rel + 1 < relend)
7328 {
7329 unsigned int insn2;
7330 bfd_vma offset = rel->r_offset;
7331
7332 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
7333 {
7334 bfd_put_32 (input_bfd, NOP, contents + offset);
7335 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7336 break;
7337 }
7338
7339 if ((tls_mask & TLS_GDIE) != 0)
7340 {
7341 /* IE */
7342 r_type = R_PPC_NONE;
7343 insn2 = 0x7c631214; /* add 3,3,2 */
7344 }
7345 else
7346 {
7347 /* LE */
7348 r_type = R_PPC_TPREL16_LO;
7349 rel->r_offset += d_offset;
7350 insn2 = 0x38630000; /* addi 3,3,0 */
7351 }
7352 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7353 bfd_put_32 (input_bfd, insn2, contents + offset);
7354 /* Zap the reloc on the _tls_get_addr call too. */
7355 BFD_ASSERT (offset == rel[1].r_offset);
7356 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7357 }
7358 break;
7359
7360 case R_PPC_TLSLD:
7361 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7362 && rel + 1 < relend)
7363 {
7364 unsigned int insn2;
7365
7366 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
7367 {
7368 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7369 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7370 break;
7371 }
7372
7373 for (r_symndx = 0;
7374 r_symndx < symtab_hdr->sh_info;
7375 r_symndx++)
7376 if (local_sections[r_symndx] == sec)
7377 break;
7378 if (r_symndx >= symtab_hdr->sh_info)
7379 r_symndx = STN_UNDEF;
7380 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7381 if (r_symndx != STN_UNDEF)
7382 rel->r_addend -= (local_syms[r_symndx].st_value
7383 + sec->output_offset
7384 + sec->output_section->vma);
7385
7386 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7387 rel->r_offset += d_offset;
7388 insn2 = 0x38630000; /* addi 3,3,0 */
7389 bfd_put_32 (input_bfd, insn2,
7390 contents + rel->r_offset - d_offset);
7391 /* Zap the reloc on the _tls_get_addr call too. */
7392 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7393 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7394 goto again;
7395 }
7396 break;
7397 }
7398
7399 /* Handle other relocations that tweak non-addend part of insn. */
7400 branch_bit = 0;
7401 switch (r_type)
7402 {
7403 default:
7404 break;
7405
7406 /* Branch taken prediction relocations. */
7407 case R_PPC_ADDR14_BRTAKEN:
7408 case R_PPC_REL14_BRTAKEN:
7409 branch_bit = BRANCH_PREDICT_BIT;
7410 /* Fall through. */
7411
7412 /* Branch not taken prediction relocations. */
7413 case R_PPC_ADDR14_BRNTAKEN:
7414 case R_PPC_REL14_BRNTAKEN:
7415 {
7416 unsigned int insn;
7417
7418 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7419 insn &= ~BRANCH_PREDICT_BIT;
7420 insn |= branch_bit;
7421
7422 from = (rel->r_offset
7423 + input_section->output_offset
7424 + input_section->output_section->vma);
7425
7426 /* Invert 'y' bit if not the default. */
7427 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7428 insn ^= BRANCH_PREDICT_BIT;
7429
7430 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7431 }
7432 break;
7433
7434 case R_PPC_PLT16_HA:
7435 {
7436 unsigned int insn;
7437
7438 insn = bfd_get_32 (input_bfd,
7439 contents + rel->r_offset - d_offset);
7440 if ((insn & (0x3fu << 26)) == 15u << 26
7441 && (insn & (0x1f << 16)) != 0)
7442 {
7443 if (!bfd_link_pic (info))
7444 {
7445 /* Convert addis to lis. */
7446 insn &= ~(0x1f << 16);
7447 bfd_put_32 (input_bfd, insn,
7448 contents + rel->r_offset - d_offset);
7449 }
7450 }
7451 else if (bfd_link_pic (info))
7452 info->callbacks->einfo
7453 (_("%P: %H: error: %s with unexpected instruction %x\n"),
7454 input_bfd, input_section, rel->r_offset,
7455 "R_PPC_PLT16_HA", insn);
7456 }
7457 break;
7458 }
7459
7460 if (ELIMINATE_COPY_RELOCS
7461 && h != NULL
7462 && !h->def_regular
7463 && h->protected_def
7464 && ppc_elf_hash_entry (h)->has_addr16_ha
7465 && ppc_elf_hash_entry (h)->has_addr16_lo
7466 && htab->params->pic_fixup > 0)
7467 {
7468 /* Convert lis;addi or lis;load/store accessing a protected
7469 variable defined in a shared library to PIC. */
7470 unsigned int insn;
7471
7472 if (r_type == R_PPC_ADDR16_HA)
7473 {
7474 insn = bfd_get_32 (input_bfd,
7475 contents + rel->r_offset - d_offset);
7476 if ((insn & (0x3fu << 26)) == (15u << 26)
7477 && (insn & (0x1f << 16)) == 0 /* lis */)
7478 {
7479 bfd_byte *p;
7480 bfd_vma off;
7481 bfd_vma got_addr;
7482
7483 p = (contents + input_section->size
7484 - relax_info->workaround_size
7485 - relax_info->picfixup_size
7486 + picfixup_size);
7487 off = (p - contents) - (rel->r_offset - d_offset);
7488 if (off > 0x1fffffc || (off & 3) != 0)
7489 info->callbacks->einfo
7490 (_("%H: fixup branch overflow\n"),
7491 input_bfd, input_section, rel->r_offset);
7492
7493 bfd_put_32 (input_bfd, B | off,
7494 contents + rel->r_offset - d_offset);
7495 got_addr = (htab->elf.sgot->output_section->vma
7496 + htab->elf.sgot->output_offset
7497 + (h->got.offset & ~1));
7498 wrel->r_offset = (p - contents) + d_offset;
7499 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
7500 wrel->r_addend = got_addr;
7501 insn &= ~0xffff;
7502 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
7503 bfd_put_32 (input_bfd, insn, p);
7504
7505 /* Convert lis to lwz, loading address from GOT. */
7506 insn &= ~0xffff;
7507 insn ^= (32u ^ 15u) << 26;
7508 insn |= (insn & (0x1f << 21)) >> 5;
7509 insn |= got_addr & 0xffff;
7510 bfd_put_32 (input_bfd, insn, p + 4);
7511
7512 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
7513 picfixup_size += 12;
7514
7515 /* Use one of the spare relocs, so --emit-relocs
7516 output is reasonable. */
7517 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7518 wrel++, rel++;
7519 rel->r_offset = wrel[-1].r_offset + 4;
7520 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
7521 rel->r_addend = wrel[-1].r_addend;
7522
7523 /* Continue on as if we had a got reloc, to output
7524 dynamic reloc. */
7525 r_type = R_PPC_GOT16_LO;
7526 }
7527 else
7528 _bfd_error_handler
7529 /* xgettext:c-format */
7530 (_("%pB(%pA+%#" PRIx64 "): error: "
7531 "%s with unexpected instruction %#x"),
7532 input_bfd, input_section, (uint64_t) rel->r_offset,
7533 "R_PPC_ADDR16_HA", insn);
7534 }
7535 else if (r_type == R_PPC_ADDR16_LO)
7536 {
7537 insn = bfd_get_32 (input_bfd,
7538 contents + rel->r_offset - d_offset);
7539 if ((insn & (0x3fu << 26)) == 14u << 26 /* addi */
7540 || (insn & (0x3fu << 26)) == 32u << 26 /* lwz */
7541 || (insn & (0x3fu << 26)) == 34u << 26 /* lbz */
7542 || (insn & (0x3fu << 26)) == 36u << 26 /* stw */
7543 || (insn & (0x3fu << 26)) == 38u << 26 /* stb */
7544 || (insn & (0x3fu << 26)) == 40u << 26 /* lhz */
7545 || (insn & (0x3fu << 26)) == 42u << 26 /* lha */
7546 || (insn & (0x3fu << 26)) == 44u << 26 /* sth */
7547 || (insn & (0x3fu << 26)) == 46u << 26 /* lmw */
7548 || (insn & (0x3fu << 26)) == 47u << 26 /* stmw */
7549 || (insn & (0x3fu << 26)) == 48u << 26 /* lfs */
7550 || (insn & (0x3fu << 26)) == 50u << 26 /* lfd */
7551 || (insn & (0x3fu << 26)) == 52u << 26 /* stfs */
7552 || (insn & (0x3fu << 26)) == 54u << 26 /* stfd */
7553 || ((insn & (0x3fu << 26)) == 58u << 26 /* lwa,ld,lmd */
7554 && (insn & 3) != 1)
7555 || ((insn & (0x3fu << 26)) == 62u << 26 /* std, stmd */
7556 && ((insn & 3) == 0 || (insn & 3) == 3)))
7557 {
7558 /* Arrange to apply the reloc addend, if any. */
7559 relocation = 0;
7560 unresolved_reloc = FALSE;
7561 rel->r_info = ELF32_R_INFO (0, r_type);
7562 }
7563 else
7564 _bfd_error_handler
7565 /* xgettext:c-format */
7566 (_("%pB(%pA+%#" PRIx64 "): error: "
7567 "%s with unexpected instruction %#x"),
7568 input_bfd, input_section, (uint64_t) rel->r_offset,
7569 "R_PPC_ADDR16_LO", insn);
7570 }
7571 }
7572
7573 ifunc = NULL;
7574 if (!htab->is_vxworks)
7575 {
7576 struct plt_entry *ent;
7577
7578 if (h != NULL)
7579 {
7580 if (h->type == STT_GNU_IFUNC)
7581 ifunc = &h->plt.plist;
7582 }
7583 else if (local_got_offsets != NULL
7584 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7585 {
7586 struct plt_entry **local_plt;
7587
7588 local_plt = (struct plt_entry **) (local_got_offsets
7589 + symtab_hdr->sh_info);
7590 ifunc = local_plt + r_symndx;
7591 }
7592
7593 ent = NULL;
7594 if (ifunc != NULL
7595 && (!bfd_link_pic (info)
7596 || is_branch_reloc (r_type)
7597 || r_type == R_PPC_PLT16_LO
7598 || r_type == R_PPC_PLT16_HI
7599 || r_type == R_PPC_PLT16_HA))
7600 {
7601 addend = 0;
7602 if (bfd_link_pic (info)
7603 && (r_type == R_PPC_PLTREL24
7604 || r_type == R_PPC_PLT16_LO
7605 || r_type == R_PPC_PLT16_HI
7606 || r_type == R_PPC_PLT16_HA))
7607 addend = rel->r_addend;
7608 ent = find_plt_ent (ifunc, got2, addend);
7609 }
7610 if (ent != NULL)
7611 {
7612 if (bfd_link_pic (info)
7613 && ent->sec != got2
7614 && htab->plt_type != PLT_NEW
7615 && (!htab->elf.dynamic_sections_created
7616 || h == NULL
7617 || h->dynindx == -1))
7618 {
7619 /* Uh oh, we are going to create a pic glink stub
7620 for an ifunc (here for h == NULL and later in
7621 finish_dynamic_symbol for h != NULL), and
7622 apparently are using code compiled with
7623 -mbss-plt. The difficulty is that -mbss-plt code
7624 gives no indication via a magic PLTREL24 addend
7625 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
7626 is pointing into a .got2 section (and how far
7627 into .got2). */
7628 info->callbacks->einfo
7629 /* xgettext:c-format */
7630 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
7631 input_bfd, input_section, rel->r_offset, sym_name);
7632 }
7633
7634 unresolved_reloc = FALSE;
7635 if (htab->plt_type == PLT_NEW
7636 || !htab->elf.dynamic_sections_created
7637 || h == NULL
7638 || h->dynindx == -1)
7639 relocation = (htab->glink->output_section->vma
7640 + htab->glink->output_offset
7641 + (ent->glink_offset & ~1));
7642 else
7643 relocation = (htab->elf.splt->output_section->vma
7644 + htab->elf.splt->output_offset
7645 + ent->plt.offset);
7646 }
7647 }
7648
7649 addend = rel->r_addend;
7650 save_unresolved_reloc = unresolved_reloc;
7651 howto = NULL;
7652 if (r_type < R_PPC_max)
7653 howto = ppc_elf_howto_table[r_type];
7654
7655 switch (r_type)
7656 {
7657 default:
7658 break;
7659
7660 case R_PPC_TPREL16_HA:
7661 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
7662 {
7663 bfd_byte *p = contents + (rel->r_offset & ~3);
7664 unsigned int insn = bfd_get_32 (input_bfd, p);
7665 if ((insn & ((0x3fu << 26) | 0x1f << 16))
7666 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
7667 /* xgettext:c-format */
7668 info->callbacks->minfo
7669 (_("%H: warning: %s unexpected insn %#x.\n"),
7670 input_bfd, input_section, rel->r_offset, howto->name, insn);
7671 else
7672 bfd_put_32 (input_bfd, NOP, p);
7673 }
7674 break;
7675
7676 case R_PPC_TPREL16_LO:
7677 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
7678 {
7679 bfd_byte *p = contents + (rel->r_offset & ~3);
7680 unsigned int insn = bfd_get_32 (input_bfd, p);
7681 insn &= ~(0x1f << 16);
7682 insn |= 2 << 16;
7683 bfd_put_32 (input_bfd, insn, p);
7684 }
7685 break;
7686 }
7687
7688 tls_type = 0;
7689 switch (r_type)
7690 {
7691 default:
7692 /* xgettext:c-format */
7693 _bfd_error_handler (_("%pB: %s unsupported"),
7694 input_bfd, howto->name);
7695
7696 bfd_set_error (bfd_error_bad_value);
7697 ret = FALSE;
7698 goto copy_reloc;
7699
7700 case R_PPC_NONE:
7701 case R_PPC_TLS:
7702 case R_PPC_TLSGD:
7703 case R_PPC_TLSLD:
7704 case R_PPC_EMB_MRKREF:
7705 case R_PPC_GNU_VTINHERIT:
7706 case R_PPC_GNU_VTENTRY:
7707 goto copy_reloc;
7708
7709 /* GOT16 relocations. Like an ADDR16 using the symbol's
7710 address in the GOT as relocation value instead of the
7711 symbol's value itself. Also, create a GOT entry for the
7712 symbol and put the symbol value there. */
7713 case R_PPC_GOT_TLSGD16:
7714 case R_PPC_GOT_TLSGD16_LO:
7715 case R_PPC_GOT_TLSGD16_HI:
7716 case R_PPC_GOT_TLSGD16_HA:
7717 tls_type = TLS_TLS | TLS_GD;
7718 goto dogot;
7719
7720 case R_PPC_GOT_TLSLD16:
7721 case R_PPC_GOT_TLSLD16_LO:
7722 case R_PPC_GOT_TLSLD16_HI:
7723 case R_PPC_GOT_TLSLD16_HA:
7724 tls_type = TLS_TLS | TLS_LD;
7725 goto dogot;
7726
7727 case R_PPC_GOT_TPREL16:
7728 case R_PPC_GOT_TPREL16_LO:
7729 case R_PPC_GOT_TPREL16_HI:
7730 case R_PPC_GOT_TPREL16_HA:
7731 tls_type = TLS_TLS | TLS_TPREL;
7732 goto dogot;
7733
7734 case R_PPC_GOT_DTPREL16:
7735 case R_PPC_GOT_DTPREL16_LO:
7736 case R_PPC_GOT_DTPREL16_HI:
7737 case R_PPC_GOT_DTPREL16_HA:
7738 tls_type = TLS_TLS | TLS_DTPREL;
7739 goto dogot;
7740
7741 case R_PPC_GOT16:
7742 case R_PPC_GOT16_LO:
7743 case R_PPC_GOT16_HI:
7744 case R_PPC_GOT16_HA:
7745 tls_mask = 0;
7746 dogot:
7747 {
7748 /* Relocation is to the entry for this symbol in the global
7749 offset table. */
7750 bfd_vma off;
7751 bfd_vma *offp;
7752 unsigned long indx;
7753
7754 if (htab->elf.sgot == NULL)
7755 abort ();
7756
7757 indx = 0;
7758 if (tls_type == (TLS_TLS | TLS_LD)
7759 && SYMBOL_REFERENCES_LOCAL (info, h))
7760 offp = &htab->tlsld_got.offset;
7761 else if (h != NULL)
7762 {
7763 if (!htab->elf.dynamic_sections_created
7764 || h->dynindx == -1
7765 || SYMBOL_REFERENCES_LOCAL (info, h)
7766 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
7767 /* This is actually a static link, or it is a
7768 -Bsymbolic link and the symbol is defined
7769 locally, or the symbol was forced to be local
7770 because of a version file. */
7771 ;
7772 else
7773 {
7774 indx = h->dynindx;
7775 unresolved_reloc = FALSE;
7776 }
7777 offp = &h->got.offset;
7778 }
7779 else
7780 {
7781 if (local_got_offsets == NULL)
7782 abort ();
7783 offp = &local_got_offsets[r_symndx];
7784 }
7785
7786 /* The offset must always be a multiple of 4. We use the
7787 least significant bit to record whether we have already
7788 processed this entry. */
7789 off = *offp;
7790 if ((off & 1) != 0)
7791 off &= ~1;
7792 else
7793 {
7794 unsigned int tls_m = ((tls_mask & TLS_TLS) != 0
7795 ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL
7796 | TLS_TPREL | TLS_GDIE)
7797 : 0);
7798
7799 if (offp == &htab->tlsld_got.offset)
7800 tls_m = TLS_LD;
7801 else if ((tls_m & TLS_LD) != 0
7802 && SYMBOL_REFERENCES_LOCAL (info, h))
7803 tls_m &= ~TLS_LD;
7804
7805 /* We might have multiple got entries for this sym.
7806 Initialize them all. */
7807 do
7808 {
7809 int tls_ty = 0;
7810
7811 if ((tls_m & TLS_LD) != 0)
7812 {
7813 tls_ty = TLS_TLS | TLS_LD;
7814 tls_m &= ~TLS_LD;
7815 }
7816 else if ((tls_m & TLS_GD) != 0)
7817 {
7818 tls_ty = TLS_TLS | TLS_GD;
7819 tls_m &= ~TLS_GD;
7820 }
7821 else if ((tls_m & TLS_DTPREL) != 0)
7822 {
7823 tls_ty = TLS_TLS | TLS_DTPREL;
7824 tls_m &= ~TLS_DTPREL;
7825 }
7826 else if ((tls_m & (TLS_TPREL | TLS_GDIE)) != 0)
7827 {
7828 tls_ty = TLS_TLS | TLS_TPREL;
7829 tls_m = 0;
7830 }
7831
7832 /* Generate relocs for the dynamic linker. */
7833 if (indx != 0
7834 || (bfd_link_pic (info)
7835 && (h == NULL
7836 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
7837 && !(tls_ty != 0
7838 && bfd_link_executable (info)
7839 && SYMBOL_REFERENCES_LOCAL (info, h))))
7840 {
7841 asection *rsec = htab->elf.srelgot;
7842 bfd_byte * loc;
7843
7844 if (ifunc != NULL)
7845 {
7846 rsec = htab->elf.irelplt;
7847 if (indx == 0)
7848 htab->local_ifunc_resolver = 1;
7849 else if (is_static_defined (h))
7850 htab->maybe_local_ifunc_resolver = 1;
7851 }
7852 outrel.r_offset = (htab->elf.sgot->output_section->vma
7853 + htab->elf.sgot->output_offset
7854 + off);
7855 outrel.r_addend = 0;
7856 if (tls_ty & (TLS_LD | TLS_GD))
7857 {
7858 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7859 if (tls_ty == (TLS_TLS | TLS_GD))
7860 {
7861 loc = rsec->contents;
7862 loc += (rsec->reloc_count++
7863 * sizeof (Elf32_External_Rela));
7864 bfd_elf32_swap_reloca_out (output_bfd,
7865 &outrel, loc);
7866 outrel.r_offset += 4;
7867 outrel.r_info
7868 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7869 }
7870 }
7871 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7872 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7873 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7874 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7875 else if (indx != 0)
7876 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7877 else if (ifunc != NULL)
7878 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7879 else
7880 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7881 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7882 {
7883 outrel.r_addend += relocation;
7884 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7885 {
7886 if (htab->elf.tls_sec == NULL)
7887 outrel.r_addend = 0;
7888 else
7889 outrel.r_addend -= htab->elf.tls_sec->vma;
7890 }
7891 }
7892 loc = rsec->contents;
7893 loc += (rsec->reloc_count++
7894 * sizeof (Elf32_External_Rela));
7895 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7896 }
7897
7898 /* Init the .got section contents if we're not
7899 emitting a reloc. */
7900 else
7901 {
7902 bfd_vma value = relocation;
7903
7904 if (tls_ty != 0)
7905 {
7906 if (htab->elf.tls_sec == NULL)
7907 value = 0;
7908 else
7909 {
7910 if (tls_ty & TLS_LD)
7911 value = 0;
7912 else
7913 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7914 if (tls_ty & TLS_TPREL)
7915 value += DTP_OFFSET - TP_OFFSET;
7916 }
7917
7918 if (tls_ty & (TLS_LD | TLS_GD))
7919 {
7920 bfd_put_32 (input_bfd, value,
7921 htab->elf.sgot->contents + off + 4);
7922 value = 1;
7923 }
7924 }
7925 bfd_put_32 (input_bfd, value,
7926 htab->elf.sgot->contents + off);
7927 }
7928
7929 off += 4;
7930 if (tls_ty & (TLS_LD | TLS_GD))
7931 off += 4;
7932 }
7933 while (tls_m != 0);
7934
7935 off = *offp;
7936 *offp = off | 1;
7937 }
7938
7939 if (off >= (bfd_vma) -2)
7940 abort ();
7941
7942 if ((tls_type & TLS_TLS) != 0)
7943 {
7944 if (tls_type != (TLS_TLS | TLS_LD))
7945 {
7946 if ((tls_mask & TLS_LD) != 0
7947 && !SYMBOL_REFERENCES_LOCAL (info, h))
7948 off += 8;
7949 if (tls_type != (TLS_TLS | TLS_GD))
7950 {
7951 if ((tls_mask & TLS_GD) != 0)
7952 off += 8;
7953 if (tls_type != (TLS_TLS | TLS_DTPREL))
7954 {
7955 if ((tls_mask & TLS_DTPREL) != 0)
7956 off += 4;
7957 }
7958 }
7959 }
7960 }
7961
7962 /* If here for a picfixup, we're done. */
7963 if (r_type != ELF32_R_TYPE (rel->r_info))
7964 goto copy_reloc;
7965
7966 relocation = (htab->elf.sgot->output_section->vma
7967 + htab->elf.sgot->output_offset
7968 + off
7969 - SYM_VAL (htab->elf.hgot));
7970
7971 /* Addends on got relocations don't make much sense.
7972 x+off@got is actually x@got+off, and since the got is
7973 generated by a hash table traversal, the value in the
7974 got at entry m+n bears little relation to the entry m. */
7975 if (addend != 0)
7976 info->callbacks->einfo
7977 /* xgettext:c-format */
7978 (_("%H: non-zero addend on %s reloc against `%s'\n"),
7979 input_bfd, input_section, rel->r_offset,
7980 howto->name,
7981 sym_name);
7982 }
7983 break;
7984
7985 /* Relocations that need no special processing. */
7986 case R_PPC_LOCAL24PC:
7987 /* It makes no sense to point a local relocation
7988 at a symbol not in this object. */
7989 if (unresolved_reloc)
7990 {
7991 (*info->callbacks->undefined_symbol) (info,
7992 h->root.root.string,
7993 input_bfd,
7994 input_section,
7995 rel->r_offset,
7996 TRUE);
7997 goto copy_reloc;
7998 }
7999 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8000 {
8001 /* @local on an ifunc does not really make sense since
8002 the ifunc resolver can take you anywhere. More
8003 seriously, calls to ifuncs must go through a plt call
8004 stub, and for pic the plt call stubs uses r30 to
8005 access the PLT. The problem is that a call that is
8006 local won't have the +32k reloc addend trick marking
8007 -fPIC code, so the linker won't know whether r30 is
8008 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8009 /* xgettext:c-format */
8010 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8011 input_bfd, input_section, rel->r_offset,
8012 h->root.root.string);
8013 }
8014 break;
8015
8016 case R_PPC_DTPREL16:
8017 case R_PPC_DTPREL16_LO:
8018 case R_PPC_DTPREL16_HI:
8019 case R_PPC_DTPREL16_HA:
8020 if (htab->elf.tls_sec != NULL)
8021 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8022 break;
8023
8024 /* Relocations that may need to be propagated if this is a shared
8025 object. */
8026 case R_PPC_TPREL16:
8027 case R_PPC_TPREL16_LO:
8028 case R_PPC_TPREL16_HI:
8029 case R_PPC_TPREL16_HA:
8030 if (h != NULL
8031 && h->root.type == bfd_link_hash_undefweak
8032 && h->dynindx == -1)
8033 {
8034 /* Make this relocation against an undefined weak symbol
8035 resolve to zero. This is really just a tweak, since
8036 code using weak externs ought to check that they are
8037 defined before using them. */
8038 bfd_byte *p = contents + rel->r_offset - d_offset;
8039 unsigned int insn = bfd_get_32 (input_bfd, p);
8040 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8041 if (insn != 0)
8042 bfd_put_32 (input_bfd, insn, p);
8043 break;
8044 }
8045 if (htab->elf.tls_sec != NULL)
8046 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8047 /* The TPREL16 relocs shouldn't really be used in shared
8048 libs or with non-local symbols as that will result in
8049 DT_TEXTREL being set, but support them anyway. */
8050 goto dodyn;
8051
8052 case R_PPC_TPREL32:
8053 if (htab->elf.tls_sec != NULL)
8054 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8055 goto dodyn;
8056
8057 case R_PPC_DTPREL32:
8058 if (htab->elf.tls_sec != NULL)
8059 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8060 goto dodyn;
8061
8062 case R_PPC_DTPMOD32:
8063 relocation = 1;
8064 addend = 0;
8065 goto dodyn;
8066
8067 case R_PPC_REL16:
8068 case R_PPC_REL16_LO:
8069 case R_PPC_REL16_HI:
8070 case R_PPC_REL16_HA:
8071 case R_PPC_REL16DX_HA:
8072 break;
8073
8074 case R_PPC_REL32:
8075 if (h == NULL || h == htab->elf.hgot)
8076 break;
8077 /* fall through */
8078
8079 case R_PPC_ADDR32:
8080 case R_PPC_ADDR16:
8081 case R_PPC_ADDR16_LO:
8082 case R_PPC_ADDR16_HI:
8083 case R_PPC_ADDR16_HA:
8084 case R_PPC_UADDR32:
8085 case R_PPC_UADDR16:
8086 goto dodyn;
8087
8088 case R_PPC_VLE_REL8:
8089 case R_PPC_VLE_REL15:
8090 case R_PPC_VLE_REL24:
8091 case R_PPC_REL24:
8092 case R_PPC_REL14:
8093 case R_PPC_REL14_BRTAKEN:
8094 case R_PPC_REL14_BRNTAKEN:
8095 /* If these relocations are not to a named symbol, they can be
8096 handled right here, no need to bother the dynamic linker. */
8097 if (SYMBOL_CALLS_LOCAL (info, h)
8098 || h == htab->elf.hgot)
8099 break;
8100 /* fall through */
8101
8102 case R_PPC_ADDR24:
8103 case R_PPC_ADDR14:
8104 case R_PPC_ADDR14_BRTAKEN:
8105 case R_PPC_ADDR14_BRNTAKEN:
8106 if (h != NULL && !bfd_link_pic (info))
8107 break;
8108 /* fall through */
8109
8110 dodyn:
8111 if ((input_section->flags & SEC_ALLOC) == 0
8112 || is_vxworks_tls)
8113 break;
8114
8115 if (bfd_link_pic (info)
8116 ? ((h == NULL
8117 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
8118 && ((h != NULL && pc_dynrelocs (h))
8119 || must_be_dyn_reloc (info, r_type)))
8120 : (h != NULL
8121 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
8122 {
8123 int skip;
8124 bfd_byte *loc;
8125 asection *sreloc;
8126 long indx = 0;
8127
8128 #ifdef DEBUG
8129 fprintf (stderr, "ppc_elf_relocate_section needs to "
8130 "create relocation for %s\n",
8131 (h && h->root.root.string
8132 ? h->root.root.string : "<unknown>"));
8133 #endif
8134
8135 /* When generating a shared object, these relocations
8136 are copied into the output file to be resolved at run
8137 time. */
8138 skip = 0;
8139 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8140 input_section,
8141 rel->r_offset);
8142 if (outrel.r_offset == (bfd_vma) -1
8143 || outrel.r_offset == (bfd_vma) -2)
8144 skip = (int) outrel.r_offset;
8145 outrel.r_offset += (input_section->output_section->vma
8146 + input_section->output_offset);
8147
8148 /* Optimize unaligned reloc use. */
8149 if ((r_type == R_PPC_ADDR32 && (outrel.r_offset & 3) != 0)
8150 || (r_type == R_PPC_UADDR32 && (outrel.r_offset & 3) == 0))
8151 r_type ^= R_PPC_ADDR32 ^ R_PPC_UADDR32;
8152 if ((r_type == R_PPC_ADDR16 && (outrel.r_offset & 1) != 0)
8153 || (r_type == R_PPC_UADDR16 && (outrel.r_offset & 1) == 0))
8154 r_type ^= R_PPC_ADDR16 ^ R_PPC_UADDR16;
8155
8156 if (skip)
8157 memset (&outrel, 0, sizeof outrel);
8158 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8159 {
8160 indx = h->dynindx;
8161 BFD_ASSERT (indx != -1);
8162 unresolved_reloc = FALSE;
8163 outrel.r_info = ELF32_R_INFO (indx, r_type);
8164 outrel.r_addend = rel->r_addend;
8165 }
8166 else
8167 {
8168 outrel.r_addend = relocation + rel->r_addend;
8169
8170 if (r_type != R_PPC_ADDR32)
8171 {
8172 if (ifunc != NULL)
8173 {
8174 /* If we get here when building a static
8175 executable, then the libc startup function
8176 responsible for applying indirect function
8177 relocations is going to complain about
8178 the reloc type.
8179 If we get here when building a dynamic
8180 executable, it will be because we have
8181 a text relocation. The dynamic loader
8182 will set the text segment writable and
8183 non-executable to apply text relocations.
8184 So we'll segfault when trying to run the
8185 indirection function to resolve the reloc. */
8186 info->callbacks->einfo
8187 /* xgettext:c-format */
8188 (_("%H: relocation %s for indirect "
8189 "function %s unsupported\n"),
8190 input_bfd, input_section, rel->r_offset,
8191 howto->name,
8192 sym_name);
8193 ret = FALSE;
8194 }
8195 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8196 ;
8197 else if (sec == NULL || sec->owner == NULL)
8198 {
8199 bfd_set_error (bfd_error_bad_value);
8200 ret = FALSE;
8201 }
8202 else
8203 {
8204 asection *osec;
8205
8206 /* We are turning this relocation into one
8207 against a section symbol. It would be
8208 proper to subtract the symbol's value,
8209 osec->vma, from the emitted reloc addend,
8210 but ld.so expects buggy relocs.
8211 FIXME: Why not always use a zero index? */
8212 osec = sec->output_section;
8213 if ((osec->flags & SEC_THREAD_LOCAL) != 0)
8214 {
8215 osec = htab->elf.tls_sec;
8216 indx = 0;
8217 }
8218 else
8219 {
8220 indx = elf_section_data (osec)->dynindx;
8221 if (indx == 0)
8222 {
8223 osec = htab->elf.text_index_section;
8224 indx = elf_section_data (osec)->dynindx;
8225 }
8226 BFD_ASSERT (indx != 0);
8227 }
8228
8229 /* ld.so doesn't expect buggy TLS relocs.
8230 Don't leave the symbol value in the
8231 addend for them. */
8232 if (IS_PPC_TLS_RELOC (r_type))
8233 outrel.r_addend -= osec->vma;
8234 }
8235
8236 outrel.r_info = ELF32_R_INFO (indx, r_type);
8237 }
8238 else if (ifunc != NULL)
8239 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8240 else
8241 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8242 }
8243
8244 sreloc = elf_section_data (input_section)->sreloc;
8245 if (ifunc)
8246 {
8247 sreloc = htab->elf.irelplt;
8248 if (indx == 0)
8249 htab->local_ifunc_resolver = 1;
8250 else if (is_static_defined (h))
8251 htab->maybe_local_ifunc_resolver = 1;
8252 }
8253 if (sreloc == NULL)
8254 return FALSE;
8255
8256 loc = sreloc->contents;
8257 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8258 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8259
8260 if (skip == -1)
8261 goto copy_reloc;
8262
8263 /* This reloc will be computed at runtime. Clear the memory
8264 so that it contains a predictable value for prelink. */
8265 if (!skip)
8266 {
8267 relocation = howto->pc_relative ? outrel.r_offset : 0;
8268 addend = 0;
8269 break;
8270 }
8271 }
8272 break;
8273
8274 case R_PPC_RELAX_PLT:
8275 case R_PPC_RELAX_PLTREL24:
8276 if (h != NULL)
8277 {
8278 struct plt_entry *ent;
8279 bfd_vma got2_addend = 0;
8280
8281 if (r_type == R_PPC_RELAX_PLTREL24)
8282 {
8283 if (bfd_link_pic (info))
8284 got2_addend = addend;
8285 addend = 0;
8286 }
8287 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8288 if (htab->plt_type == PLT_NEW)
8289 relocation = (htab->glink->output_section->vma
8290 + htab->glink->output_offset
8291 + ent->glink_offset);
8292 else
8293 relocation = (htab->elf.splt->output_section->vma
8294 + htab->elf.splt->output_offset
8295 + ent->plt.offset);
8296 }
8297 /* Fall through. */
8298
8299 case R_PPC_RELAX:
8300 {
8301 const int *stub;
8302 size_t size;
8303 size_t insn_offset = rel->r_offset;
8304 unsigned int insn;
8305
8306 if (bfd_link_pic (info))
8307 {
8308 relocation -= (input_section->output_section->vma
8309 + input_section->output_offset
8310 + rel->r_offset - 4);
8311 stub = shared_stub_entry;
8312 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
8313 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
8314 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
8315 stub += 3;
8316 size = ARRAY_SIZE (shared_stub_entry) - 3;
8317 }
8318 else
8319 {
8320 stub = stub_entry;
8321 size = ARRAY_SIZE (stub_entry);
8322 }
8323
8324 relocation += addend;
8325 if (bfd_link_relocatable (info))
8326 relocation = 0;
8327
8328 /* First insn is HA, second is LO. */
8329 insn = *stub++;
8330 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8331 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8332 insn_offset += 4;
8333
8334 insn = *stub++;
8335 insn |= relocation & 0xffff;
8336 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8337 insn_offset += 4;
8338 size -= 2;
8339
8340 while (size != 0)
8341 {
8342 insn = *stub++;
8343 --size;
8344 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8345 insn_offset += 4;
8346 }
8347
8348 /* Rewrite the reloc and convert one of the trailing nop
8349 relocs to describe this relocation. */
8350 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8351 /* The relocs are at the bottom 2 bytes */
8352 wrel->r_offset = rel->r_offset + d_offset;
8353 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8354 wrel->r_addend = rel->r_addend;
8355 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
8356 wrel++, rel++;
8357 wrel->r_offset += 4;
8358 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8359 }
8360 continue;
8361
8362 /* Indirect .sdata relocation. */
8363 case R_PPC_EMB_SDAI16:
8364 BFD_ASSERT (htab->sdata[0].section != NULL);
8365 if (!is_static_defined (htab->sdata[0].sym))
8366 {
8367 unresolved_reloc = TRUE;
8368 break;
8369 }
8370 relocation
8371 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8372 h, relocation, rel);
8373 addend = 0;
8374 break;
8375
8376 /* Indirect .sdata2 relocation. */
8377 case R_PPC_EMB_SDA2I16:
8378 BFD_ASSERT (htab->sdata[1].section != NULL);
8379 if (!is_static_defined (htab->sdata[1].sym))
8380 {
8381 unresolved_reloc = TRUE;
8382 break;
8383 }
8384 relocation
8385 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8386 h, relocation, rel);
8387 addend = 0;
8388 break;
8389
8390 /* Handle the TOC16 reloc. We want to use the offset within the .got
8391 section, not the actual VMA. This is appropriate when generating
8392 an embedded ELF object, for which the .got section acts like the
8393 AIX .toc section. */
8394 case R_PPC_TOC16: /* phony GOT16 relocations */
8395 if (sec == NULL || sec->output_section == NULL)
8396 {
8397 unresolved_reloc = TRUE;
8398 break;
8399 }
8400 BFD_ASSERT (strcmp (bfd_section_name (sec), ".got") == 0
8401 || strcmp (bfd_section_name (sec), ".cgot") == 0);
8402
8403 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8404 break;
8405
8406 case R_PPC_PLTREL24:
8407 if (h != NULL && ifunc == NULL)
8408 {
8409 struct plt_entry *ent;
8410
8411 ent = find_plt_ent (&h->plt.plist, got2,
8412 bfd_link_pic (info) ? addend : 0);
8413 if (ent == NULL
8414 || htab->elf.splt == NULL)
8415 {
8416 /* We didn't make a PLT entry for this symbol. This
8417 happens when statically linking PIC code, or when
8418 using -Bsymbolic. */
8419 }
8420 else
8421 {
8422 /* Relocation is to the entry for this symbol in the
8423 procedure linkage table. */
8424 unresolved_reloc = FALSE;
8425 if (htab->plt_type == PLT_NEW)
8426 relocation = (htab->glink->output_section->vma
8427 + htab->glink->output_offset
8428 + ent->glink_offset);
8429 else
8430 relocation = (htab->elf.splt->output_section->vma
8431 + htab->elf.splt->output_offset
8432 + ent->plt.offset);
8433 }
8434 }
8435
8436 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8437 addend specifies the GOT pointer offset within .got2.
8438 Don't apply it to the relocation field. */
8439 addend = 0;
8440 break;
8441
8442 case R_PPC_PLTSEQ:
8443 case R_PPC_PLTCALL:
8444 case R_PPC_PLT16_LO:
8445 case R_PPC_PLT16_HI:
8446 case R_PPC_PLT16_HA:
8447 plt_list = NULL;
8448 if (h != NULL)
8449 plt_list = &h->plt.plist;
8450 else if (ifunc != NULL)
8451 plt_list = ifunc;
8452 else if (local_got_offsets != NULL)
8453 {
8454 struct plt_entry **local_plt;
8455 local_plt = (struct plt_entry **) (local_got_offsets
8456 + symtab_hdr->sh_info);
8457 plt_list = local_plt + r_symndx;
8458 }
8459 unresolved_reloc = TRUE;
8460 if (plt_list != NULL)
8461 {
8462 struct plt_entry *ent;
8463
8464 ent = find_plt_ent (plt_list, got2,
8465 bfd_link_pic (info) ? addend : 0);
8466 if (ent != NULL && ent->plt.offset != (bfd_vma) -1)
8467 {
8468 asection *plt;
8469
8470 unresolved_reloc = FALSE;
8471 plt = htab->elf.splt;
8472 if (!htab->elf.dynamic_sections_created
8473 || h == NULL
8474 || h->dynindx == -1)
8475 {
8476 if (ifunc != NULL)
8477 plt = htab->elf.iplt;
8478 else
8479 plt = htab->pltlocal;
8480 }
8481 relocation = (plt->output_section->vma
8482 + plt->output_offset
8483 + ent->plt.offset);
8484 if (bfd_link_pic (info))
8485 {
8486 bfd_vma got = 0;
8487
8488 if (ent->addend >= 32768)
8489 got = (ent->addend
8490 + ent->sec->output_section->vma
8491 + ent->sec->output_offset);
8492 else
8493 got = SYM_VAL (htab->elf.hgot);
8494 relocation -= got;
8495 }
8496 }
8497 }
8498 addend = 0;
8499 break;
8500
8501 /* Relocate against _SDA_BASE_. */
8502 case R_PPC_SDAREL16:
8503 {
8504 const char *name;
8505 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8506
8507 if (sec == NULL
8508 || sec->output_section == NULL
8509 || !is_static_defined (sda))
8510 {
8511 unresolved_reloc = TRUE;
8512 break;
8513 }
8514 addend -= SYM_VAL (sda);
8515
8516 name = bfd_section_name (sec->output_section);
8517 if (!(strcmp (name, ".sdata") == 0
8518 || strcmp (name, ".sbss") == 0))
8519 {
8520 _bfd_error_handler
8521 /* xgettext:c-format */
8522 (_("%pB: the target (%s) of a %s relocation is "
8523 "in the wrong output section (%s)"),
8524 input_bfd,
8525 sym_name,
8526 howto->name,
8527 name);
8528 }
8529 }
8530 break;
8531
8532 /* Relocate against _SDA2_BASE_. */
8533 case R_PPC_EMB_SDA2REL:
8534 {
8535 const char *name;
8536 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8537
8538 if (sec == NULL
8539 || sec->output_section == NULL
8540 || !is_static_defined (sda))
8541 {
8542 unresolved_reloc = TRUE;
8543 break;
8544 }
8545 addend -= SYM_VAL (sda);
8546
8547 name = bfd_section_name (sec->output_section);
8548 if (!(strcmp (name, ".sdata2") == 0
8549 || strcmp (name, ".sbss2") == 0))
8550 {
8551 _bfd_error_handler
8552 /* xgettext:c-format */
8553 (_("%pB: the target (%s) of a %s relocation is "
8554 "in the wrong output section (%s)"),
8555 input_bfd,
8556 sym_name,
8557 howto->name,
8558 name);
8559 }
8560 }
8561 break;
8562
8563 case R_PPC_VLE_LO16A:
8564 relocation = relocation + addend;
8565 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8566 contents + rel->r_offset, relocation,
8567 split16a_type, htab->params->vle_reloc_fixup);
8568 goto copy_reloc;
8569
8570 case R_PPC_VLE_LO16D:
8571 relocation = relocation + addend;
8572 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8573 contents + rel->r_offset, relocation,
8574 split16d_type, htab->params->vle_reloc_fixup);
8575 goto copy_reloc;
8576
8577 case R_PPC_VLE_HI16A:
8578 relocation = (relocation + addend) >> 16;
8579 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8580 contents + rel->r_offset, relocation,
8581 split16a_type, htab->params->vle_reloc_fixup);
8582 goto copy_reloc;
8583
8584 case R_PPC_VLE_HI16D:
8585 relocation = (relocation + addend) >> 16;
8586 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8587 contents + rel->r_offset, relocation,
8588 split16d_type, htab->params->vle_reloc_fixup);
8589 goto copy_reloc;
8590
8591 case R_PPC_VLE_HA16A:
8592 relocation = (relocation + addend + 0x8000) >> 16;
8593 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8594 contents + rel->r_offset, relocation,
8595 split16a_type, htab->params->vle_reloc_fixup);
8596 goto copy_reloc;
8597
8598 case R_PPC_VLE_HA16D:
8599 relocation = (relocation + addend + 0x8000) >> 16;
8600 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8601 contents + rel->r_offset, relocation,
8602 split16d_type, htab->params->vle_reloc_fixup);
8603 goto copy_reloc;
8604
8605 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8606 case R_PPC_EMB_SDA21:
8607 case R_PPC_VLE_SDA21:
8608 case R_PPC_EMB_RELSDA:
8609 case R_PPC_VLE_SDA21_LO:
8610 {
8611 const char *name;
8612 int reg;
8613 unsigned int insn;
8614 struct elf_link_hash_entry *sda = NULL;
8615
8616 if (sec == NULL || sec->output_section == NULL)
8617 {
8618 unresolved_reloc = TRUE;
8619 break;
8620 }
8621
8622 name = bfd_section_name (sec->output_section);
8623 if (strcmp (name, ".sdata") == 0
8624 || strcmp (name, ".sbss") == 0)
8625 {
8626 reg = 13;
8627 sda = htab->sdata[0].sym;
8628 }
8629 else if (strcmp (name, ".sdata2") == 0
8630 || strcmp (name, ".sbss2") == 0)
8631 {
8632 reg = 2;
8633 sda = htab->sdata[1].sym;
8634 }
8635 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8636 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8637 {
8638 reg = 0;
8639 }
8640 else
8641 {
8642 _bfd_error_handler
8643 /* xgettext:c-format */
8644 (_("%pB: the target (%s) of a %s relocation is "
8645 "in the wrong output section (%s)"),
8646 input_bfd,
8647 sym_name,
8648 howto->name,
8649 name);
8650
8651 bfd_set_error (bfd_error_bad_value);
8652 ret = FALSE;
8653 goto copy_reloc;
8654 }
8655
8656 if (sda != NULL)
8657 {
8658 if (!is_static_defined (sda))
8659 {
8660 unresolved_reloc = TRUE;
8661 break;
8662 }
8663 addend -= SYM_VAL (sda);
8664 }
8665
8666 if (r_type == R_PPC_EMB_RELSDA)
8667 break;
8668
8669 /* The PowerPC Embedded Application Binary Interface
8670 version 1.0 insanely chose to specify R_PPC_EMB_SDA21
8671 operating on a 24-bit field at r_offset. GNU as and
8672 GNU ld have always assumed R_PPC_EMB_SDA21 operates on
8673 a 32-bit bit insn at r_offset. Cope with object file
8674 producers that possibly comply with the EABI in
8675 generating an odd r_offset for big-endian objects. */
8676 if (r_type == R_PPC_EMB_SDA21)
8677 rel->r_offset &= ~1;
8678
8679 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8680 if (reg == 0
8681 && (r_type == R_PPC_VLE_SDA21
8682 || r_type == R_PPC_VLE_SDA21_LO))
8683 {
8684 relocation = relocation + addend;
8685 addend = 0;
8686
8687 /* Force e_li insn, keeping RT from original insn. */
8688 insn &= 0x1f << 21;
8689 insn |= 28u << 26;
8690
8691 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8692 /* Top 4 bits of value to 17..20. */
8693 insn |= (relocation & 0xf0000) >> 5;
8694 /* Next 5 bits of the value to 11..15. */
8695 insn |= (relocation & 0xf800) << 5;
8696 /* And the final 11 bits of the value to bits 21 to 31. */
8697 insn |= relocation & 0x7ff;
8698
8699 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8700
8701 if (r_type == R_PPC_VLE_SDA21
8702 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8703 goto overflow;
8704 goto copy_reloc;
8705 }
8706 /* Fill in register field. */
8707 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8708 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8709 }
8710 break;
8711
8712 case R_PPC_VLE_SDAREL_LO16A:
8713 case R_PPC_VLE_SDAREL_LO16D:
8714 case R_PPC_VLE_SDAREL_HI16A:
8715 case R_PPC_VLE_SDAREL_HI16D:
8716 case R_PPC_VLE_SDAREL_HA16A:
8717 case R_PPC_VLE_SDAREL_HA16D:
8718 {
8719 bfd_vma value;
8720 const char *name;
8721 struct elf_link_hash_entry *sda = NULL;
8722
8723 if (sec == NULL || sec->output_section == NULL)
8724 {
8725 unresolved_reloc = TRUE;
8726 break;
8727 }
8728
8729 name = bfd_section_name (sec->output_section);
8730 if (strcmp (name, ".sdata") == 0
8731 || strcmp (name, ".sbss") == 0)
8732 sda = htab->sdata[0].sym;
8733 else if (strcmp (name, ".sdata2") == 0
8734 || strcmp (name, ".sbss2") == 0)
8735 sda = htab->sdata[1].sym;
8736 else
8737 {
8738 _bfd_error_handler
8739 /* xgettext:c-format */
8740 (_("%pB: the target (%s) of a %s relocation is "
8741 "in the wrong output section (%s)"),
8742 input_bfd,
8743 sym_name,
8744 howto->name,
8745 name);
8746
8747 bfd_set_error (bfd_error_bad_value);
8748 ret = FALSE;
8749 goto copy_reloc;
8750 }
8751
8752 if (sda == NULL || !is_static_defined (sda))
8753 {
8754 unresolved_reloc = TRUE;
8755 break;
8756 }
8757 value = relocation + addend - SYM_VAL (sda);
8758
8759 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8760 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8761 contents + rel->r_offset, value,
8762 split16a_type,
8763 htab->params->vle_reloc_fixup);
8764 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8765 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8766 contents + rel->r_offset, value,
8767 split16d_type,
8768 htab->params->vle_reloc_fixup);
8769 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8770 {
8771 value = value >> 16;
8772 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8773 contents + rel->r_offset, value,
8774 split16a_type,
8775 htab->params->vle_reloc_fixup);
8776 }
8777 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8778 {
8779 value = value >> 16;
8780 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8781 contents + rel->r_offset, value,
8782 split16d_type,
8783 htab->params->vle_reloc_fixup);
8784 }
8785 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8786 {
8787 value = (value + 0x8000) >> 16;
8788 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8789 contents + rel->r_offset, value,
8790 split16a_type,
8791 htab->params->vle_reloc_fixup);
8792 }
8793 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8794 {
8795 value = (value + 0x8000) >> 16;
8796 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
8797 contents + rel->r_offset, value,
8798 split16d_type,
8799 htab->params->vle_reloc_fixup);
8800 }
8801 }
8802 goto copy_reloc;
8803
8804 case R_PPC_VLE_ADDR20:
8805 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
8806 continue;
8807
8808 /* Relocate against the beginning of the section. */
8809 case R_PPC_SECTOFF:
8810 case R_PPC_SECTOFF_LO:
8811 case R_PPC_SECTOFF_HI:
8812 case R_PPC_SECTOFF_HA:
8813 if (sec == NULL || sec->output_section == NULL)
8814 {
8815 unresolved_reloc = TRUE;
8816 break;
8817 }
8818 addend -= sec->output_section->vma;
8819 break;
8820
8821 /* Negative relocations. */
8822 case R_PPC_EMB_NADDR32:
8823 case R_PPC_EMB_NADDR16:
8824 case R_PPC_EMB_NADDR16_LO:
8825 case R_PPC_EMB_NADDR16_HI:
8826 case R_PPC_EMB_NADDR16_HA:
8827 addend -= 2 * relocation;
8828 break;
8829
8830 case R_PPC_COPY:
8831 case R_PPC_GLOB_DAT:
8832 case R_PPC_JMP_SLOT:
8833 case R_PPC_RELATIVE:
8834 case R_PPC_IRELATIVE:
8835 case R_PPC_PLT32:
8836 case R_PPC_PLTREL32:
8837 case R_PPC_ADDR30:
8838 case R_PPC_EMB_RELSEC16:
8839 case R_PPC_EMB_RELST_LO:
8840 case R_PPC_EMB_RELST_HI:
8841 case R_PPC_EMB_RELST_HA:
8842 case R_PPC_EMB_BIT_FLD:
8843 /* xgettext:c-format */
8844 _bfd_error_handler (_("%pB: %s unsupported"),
8845 input_bfd, howto->name);
8846
8847 bfd_set_error (bfd_error_invalid_operation);
8848 ret = FALSE;
8849 goto copy_reloc;
8850 }
8851
8852 switch (r_type)
8853 {
8854 default:
8855 break;
8856
8857 case R_PPC_PLTCALL:
8858 if (unresolved_reloc)
8859 {
8860 bfd_byte *p = contents + rel->r_offset;
8861 unsigned int insn = bfd_get_32 (input_bfd, p);
8862 insn &= 1;
8863 bfd_put_32 (input_bfd, B | insn, p);
8864 unresolved_reloc = save_unresolved_reloc;
8865 r_type = R_PPC_REL24;
8866 howto = ppc_elf_howto_table[r_type];
8867 }
8868 else if (htab->plt_type != PLT_NEW)
8869 info->callbacks->einfo
8870 (_("%X%P: %H: %s relocation unsupported for bss-plt\n"),
8871 input_bfd, input_section, rel->r_offset,
8872 howto->name);
8873 break;
8874
8875 case R_PPC_PLTSEQ:
8876 case R_PPC_PLT16_HA:
8877 case R_PPC_PLT16_LO:
8878 if (unresolved_reloc)
8879 {
8880 bfd_byte *p = contents + (rel->r_offset & ~3);
8881 bfd_put_32 (input_bfd, NOP, p);
8882 unresolved_reloc = FALSE;
8883 r_type = R_PPC_NONE;
8884 howto = ppc_elf_howto_table[r_type];
8885 }
8886 else if (htab->plt_type != PLT_NEW)
8887 info->callbacks->einfo
8888 (_("%X%P: %H: %s relocation unsupported for bss-plt\n"),
8889 input_bfd, input_section, rel->r_offset,
8890 howto->name);
8891 break;
8892 }
8893
8894 /* Do any further special processing. */
8895 switch (r_type)
8896 {
8897 default:
8898 break;
8899
8900 case R_PPC_ADDR16_HA:
8901 case R_PPC_REL16_HA:
8902 case R_PPC_REL16DX_HA:
8903 case R_PPC_SECTOFF_HA:
8904 case R_PPC_TPREL16_HA:
8905 case R_PPC_DTPREL16_HA:
8906 case R_PPC_EMB_NADDR16_HA:
8907 case R_PPC_EMB_RELST_HA:
8908 /* It's just possible that this symbol is a weak symbol
8909 that's not actually defined anywhere. In that case,
8910 'sec' would be NULL, and we should leave the symbol
8911 alone (it will be set to zero elsewhere in the link). */
8912 if (sec == NULL)
8913 break;
8914 /* Fall through. */
8915
8916 case R_PPC_PLT16_HA:
8917 case R_PPC_GOT16_HA:
8918 case R_PPC_GOT_TLSGD16_HA:
8919 case R_PPC_GOT_TLSLD16_HA:
8920 case R_PPC_GOT_TPREL16_HA:
8921 case R_PPC_GOT_DTPREL16_HA:
8922 /* Add 0x10000 if sign bit in 0:15 is set.
8923 Bits 0:15 are not used. */
8924 addend += 0x8000;
8925 break;
8926
8927 case R_PPC_ADDR16:
8928 case R_PPC_ADDR16_LO:
8929 case R_PPC_GOT16:
8930 case R_PPC_GOT16_LO:
8931 case R_PPC_SDAREL16:
8932 case R_PPC_SECTOFF:
8933 case R_PPC_SECTOFF_LO:
8934 case R_PPC_DTPREL16:
8935 case R_PPC_DTPREL16_LO:
8936 case R_PPC_TPREL16:
8937 case R_PPC_TPREL16_LO:
8938 case R_PPC_GOT_TLSGD16:
8939 case R_PPC_GOT_TLSGD16_LO:
8940 case R_PPC_GOT_TLSLD16:
8941 case R_PPC_GOT_TLSLD16_LO:
8942 case R_PPC_GOT_DTPREL16:
8943 case R_PPC_GOT_DTPREL16_LO:
8944 case R_PPC_GOT_TPREL16:
8945 case R_PPC_GOT_TPREL16_LO:
8946 {
8947 /* The 32-bit ABI lacks proper relocations to deal with
8948 certain 64-bit instructions. Prevent damage to bits
8949 that make up part of the insn opcode. */
8950 unsigned int insn, mask, lobit;
8951
8952 insn = bfd_get_32 (input_bfd,
8953 contents + rel->r_offset - d_offset);
8954 mask = 0;
8955 if (is_insn_ds_form (insn))
8956 mask = 3;
8957 else if (is_insn_dq_form (insn))
8958 mask = 15;
8959 else
8960 break;
8961 relocation += addend;
8962 addend = insn & mask;
8963 lobit = mask & relocation;
8964 if (lobit != 0)
8965 {
8966 relocation ^= lobit;
8967 info->callbacks->einfo
8968 /* xgettext:c-format */
8969 (_("%H: error: %s against `%s' not a multiple of %u\n"),
8970 input_bfd, input_section, rel->r_offset,
8971 howto->name, sym_name, mask + 1);
8972 bfd_set_error (bfd_error_bad_value);
8973 ret = FALSE;
8974 }
8975 }
8976 break;
8977 }
8978
8979 #ifdef DEBUG
8980 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8981 "offset = %ld, addend = %ld\n",
8982 howto->name,
8983 (int) r_type,
8984 sym_name,
8985 r_symndx,
8986 (long) rel->r_offset,
8987 (long) addend);
8988 #endif
8989
8990 if (unresolved_reloc
8991 && !((input_section->flags & SEC_DEBUGGING) != 0
8992 && h->def_dynamic)
8993 && _bfd_elf_section_offset (output_bfd, info, input_section,
8994 rel->r_offset) != (bfd_vma) -1)
8995 {
8996 info->callbacks->einfo
8997 /* xgettext:c-format */
8998 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
8999 input_bfd, input_section, rel->r_offset,
9000 howto->name,
9001 sym_name);
9002 ret = FALSE;
9003 }
9004
9005 /* 16-bit fields in insns mostly have signed values, but a
9006 few insns have 16-bit unsigned values. Really, we should
9007 have different reloc types. */
9008 if (howto->complain_on_overflow != complain_overflow_dont
9009 && howto->dst_mask == 0xffff
9010 && (input_section->flags & SEC_CODE) != 0)
9011 {
9012 enum complain_overflow complain = complain_overflow_signed;
9013
9014 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9015 {
9016 unsigned int insn;
9017
9018 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9019 if ((insn & (0x3fu << 26)) == 10u << 26 /* cmpli */)
9020 complain = complain_overflow_bitfield;
9021 else if ((insn & (0x3fu << 26)) == 28u << 26 /* andi */
9022 || (insn & (0x3fu << 26)) == 24u << 26 /* ori */
9023 || (insn & (0x3fu << 26)) == 26u << 26 /* xori */)
9024 complain = complain_overflow_unsigned;
9025 }
9026 if (howto->complain_on_overflow != complain)
9027 {
9028 alt_howto = *howto;
9029 alt_howto.complain_on_overflow = complain;
9030 howto = &alt_howto;
9031 }
9032 }
9033
9034 if (r_type == R_PPC_REL16DX_HA)
9035 {
9036 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9037 if (rel->r_offset + 4 > input_section->size)
9038 r = bfd_reloc_outofrange;
9039 else
9040 {
9041 unsigned int insn;
9042
9043 relocation += addend;
9044 relocation -= (rel->r_offset
9045 + input_section->output_offset
9046 + input_section->output_section->vma);
9047 relocation >>= 16;
9048 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9049 insn &= ~0x1fffc1;
9050 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9051 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9052 r = bfd_reloc_ok;
9053 }
9054 }
9055 else
9056 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9057 rel->r_offset, relocation, addend);
9058
9059 if (r != bfd_reloc_ok)
9060 {
9061 if (r == bfd_reloc_overflow)
9062 {
9063 overflow:
9064 /* On code like "if (foo) foo();" don't report overflow
9065 on a branch to zero when foo is undefined. */
9066 if (!warned
9067 && !(h != NULL
9068 && (h->root.type == bfd_link_hash_undefweak
9069 || h->root.type == bfd_link_hash_undefined)
9070 && is_branch_reloc (r_type)))
9071 info->callbacks->reloc_overflow
9072 (info, (h ? &h->root : NULL), sym_name, howto->name,
9073 rel->r_addend, input_bfd, input_section, rel->r_offset);
9074 }
9075 else
9076 {
9077 info->callbacks->einfo
9078 /* xgettext:c-format */
9079 (_("%H: %s reloc against `%s': error %d\n"),
9080 input_bfd, input_section, rel->r_offset,
9081 howto->name, sym_name, (int) r);
9082 ret = FALSE;
9083 }
9084 }
9085 copy_reloc:
9086 if (wrel != rel)
9087 *wrel = *rel;
9088 }
9089
9090 if (wrel != rel)
9091 {
9092 Elf_Internal_Shdr *rel_hdr;
9093 size_t deleted = rel - wrel;
9094
9095 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9096 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9097 if (rel_hdr->sh_size == 0)
9098 {
9099 /* It is too late to remove an empty reloc section. Leave
9100 one NONE reloc.
9101 ??? What is wrong with an empty section??? */
9102 rel_hdr->sh_size = rel_hdr->sh_entsize;
9103 deleted -= 1;
9104 wrel++;
9105 }
9106 relend = wrel;
9107 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9108 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9109 input_section->reloc_count -= deleted;
9110 }
9111
9112 #ifdef DEBUG
9113 fprintf (stderr, "\n");
9114 #endif
9115
9116 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9117 && input_section->size != input_section->rawsize
9118 && (strcmp (input_section->output_section->name, ".init") == 0
9119 || strcmp (input_section->output_section->name, ".fini") == 0))
9120 {
9121 /* Branch around the trampolines. */
9122 unsigned int insn = B + input_section->size - input_section->rawsize;
9123 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9124 }
9125
9126 if (htab->params->ppc476_workaround
9127 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9128 && (!bfd_link_relocatable (info)
9129 || (input_section->output_section->alignment_power
9130 >= htab->params->pagesize_p2)))
9131 {
9132 bfd_vma start_addr, end_addr, addr;
9133 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9134
9135 if (relax_info->workaround_size != 0)
9136 {
9137 bfd_byte *p;
9138 unsigned int n;
9139 bfd_byte fill[4];
9140
9141 bfd_put_32 (input_bfd, BA, fill);
9142 p = contents + input_section->size - relax_info->workaround_size;
9143 n = relax_info->workaround_size >> 2;
9144 while (n--)
9145 {
9146 memcpy (p, fill, 4);
9147 p += 4;
9148 }
9149 }
9150
9151 /* The idea is: Replace the last instruction on a page with a
9152 branch to a patch area. Put the insn there followed by a
9153 branch back to the next page. Complicated a little by
9154 needing to handle moved conditional branches, and by not
9155 wanting to touch data-in-text. */
9156
9157 start_addr = (input_section->output_section->vma
9158 + input_section->output_offset);
9159 end_addr = (start_addr + input_section->size
9160 - relax_info->workaround_size);
9161 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9162 addr < end_addr;
9163 addr += pagesize)
9164 {
9165 bfd_vma offset = addr - start_addr;
9166 Elf_Internal_Rela *lo, *hi;
9167 bfd_boolean is_data;
9168 bfd_vma patch_off, patch_addr;
9169 unsigned int insn;
9170
9171 /* Do we have a data reloc at this offset? If so, leave
9172 the word alone. */
9173 is_data = FALSE;
9174 lo = relocs;
9175 hi = relend;
9176 rel = NULL;
9177 while (lo < hi)
9178 {
9179 rel = lo + (hi - lo) / 2;
9180 if (rel->r_offset < offset)
9181 lo = rel + 1;
9182 else if (rel->r_offset > offset + 3)
9183 hi = rel;
9184 else
9185 {
9186 switch (ELF32_R_TYPE (rel->r_info))
9187 {
9188 case R_PPC_ADDR32:
9189 case R_PPC_UADDR32:
9190 case R_PPC_REL32:
9191 case R_PPC_ADDR30:
9192 is_data = TRUE;
9193 break;
9194 default:
9195 break;
9196 }
9197 break;
9198 }
9199 }
9200 if (is_data)
9201 continue;
9202
9203 /* Some instructions can be left alone too. Unconditional
9204 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9205 avoid the icache failure.
9206
9207 The problem occurs due to prefetch across a page boundary
9208 where stale instructions can be fetched from the next
9209 page, and the mechanism for flushing these bad
9210 instructions fails under certain circumstances. The
9211 unconditional branches:
9212 1) Branch: b, bl, ba, bla,
9213 2) Branch Conditional: bc, bca, bcl, bcla,
9214 3) Branch Conditional to Link Register: bclr, bclrl,
9215 where (2) and (3) have BO=0x14 making them unconditional,
9216 prevent the bad prefetch because the prefetch itself is
9217 affected by these instructions. This happens even if the
9218 instruction is not executed.
9219
9220 A bctr example:
9221 .
9222 . lis 9,new_page@ha
9223 . addi 9,9,new_page@l
9224 . mtctr 9
9225 . bctr
9226 . nop
9227 . nop
9228 . new_page:
9229 .
9230 The bctr is not predicted taken due to ctr not being
9231 ready, so prefetch continues on past the bctr into the
9232 new page which might have stale instructions. If they
9233 fail to be flushed, then they will be executed after the
9234 bctr executes. Either of the following modifications
9235 prevent the bad prefetch from happening in the first
9236 place:
9237 .
9238 . lis 9,new_page@ha lis 9,new_page@ha
9239 . addi 9,9,new_page@l addi 9,9,new_page@l
9240 . mtctr 9 mtctr 9
9241 . bctr bctr
9242 . nop b somewhere_else
9243 . b somewhere_else nop
9244 . new_page: new_page:
9245 . */
9246 insn = bfd_get_32 (input_bfd, contents + offset);
9247 if ((insn & (0x3fu << 26)) == (18u << 26) /* b,bl,ba,bla */
9248 || ((insn & (0x3fu << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9249 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9250 || ((insn & (0x3fu << 26)) == (19u << 26)
9251 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9252 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9253 continue;
9254
9255 patch_addr = (start_addr + input_section->size
9256 - relax_info->workaround_size);
9257 patch_addr = (patch_addr + 15) & -16;
9258 patch_off = patch_addr - start_addr;
9259 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9260
9261 if (rel != NULL
9262 && rel->r_offset >= offset
9263 && rel->r_offset < offset + 4)
9264 {
9265 asection *sreloc;
9266
9267 /* If the insn we are patching had a reloc, adjust the
9268 reloc r_offset so that the reloc applies to the moved
9269 location. This matters for -r and --emit-relocs. */
9270 if (rel + 1 != relend)
9271 {
9272 Elf_Internal_Rela tmp = *rel;
9273
9274 /* Keep the relocs sorted by r_offset. */
9275 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9276 relend[-1] = tmp;
9277 }
9278 relend[-1].r_offset += patch_off - offset;
9279
9280 /* Adjust REL16 addends too. */
9281 switch (ELF32_R_TYPE (relend[-1].r_info))
9282 {
9283 case R_PPC_REL16:
9284 case R_PPC_REL16_LO:
9285 case R_PPC_REL16_HI:
9286 case R_PPC_REL16_HA:
9287 relend[-1].r_addend += patch_off - offset;
9288 break;
9289 default:
9290 break;
9291 }
9292
9293 /* If we are building a PIE or shared library with
9294 non-PIC objects, perhaps we had a dynamic reloc too?
9295 If so, the dynamic reloc must move with the insn. */
9296 sreloc = elf_section_data (input_section)->sreloc;
9297 if (sreloc != NULL)
9298 {
9299 Elf32_External_Rela *slo, *shi, *srelend;
9300 bfd_vma soffset;
9301
9302 slo = (Elf32_External_Rela *) sreloc->contents;
9303 shi = srelend = slo + sreloc->reloc_count;
9304 soffset = (offset + input_section->output_section->vma
9305 + input_section->output_offset);
9306 while (slo < shi)
9307 {
9308 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9309 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9310 &outrel);
9311 if (outrel.r_offset < soffset)
9312 slo = srel + 1;
9313 else if (outrel.r_offset > soffset + 3)
9314 shi = srel;
9315 else
9316 {
9317 if (srel + 1 != srelend)
9318 {
9319 memmove (srel, srel + 1,
9320 (srelend - (srel + 1)) * sizeof (*srel));
9321 srel = srelend - 1;
9322 }
9323 outrel.r_offset += patch_off - offset;
9324 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9325 (bfd_byte *) srel);
9326 break;
9327 }
9328 }
9329 }
9330 }
9331 else
9332 rel = NULL;
9333
9334 if ((insn & (0x3fu << 26)) == (16u << 26) /* bc */
9335 && (insn & 2) == 0 /* relative */)
9336 {
9337 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9338
9339 delta += offset - patch_off;
9340 if (bfd_link_relocatable (info) && rel != NULL)
9341 delta = 0;
9342 if (!bfd_link_relocatable (info) && rel != NULL)
9343 {
9344 enum elf_ppc_reloc_type r_type;
9345
9346 r_type = ELF32_R_TYPE (relend[-1].r_info);
9347 if (r_type == R_PPC_REL14_BRTAKEN)
9348 insn |= BRANCH_PREDICT_BIT;
9349 else if (r_type == R_PPC_REL14_BRNTAKEN)
9350 insn &= ~BRANCH_PREDICT_BIT;
9351 else
9352 BFD_ASSERT (r_type == R_PPC_REL14);
9353
9354 if ((r_type == R_PPC_REL14_BRTAKEN
9355 || r_type == R_PPC_REL14_BRNTAKEN)
9356 && delta + 0x8000 < 0x10000
9357 && (bfd_signed_vma) delta < 0)
9358 insn ^= BRANCH_PREDICT_BIT;
9359 }
9360 if (delta + 0x8000 < 0x10000)
9361 {
9362 bfd_put_32 (input_bfd,
9363 (insn & ~0xfffc) | (delta & 0xfffc),
9364 contents + patch_off);
9365 patch_off += 4;
9366 bfd_put_32 (input_bfd,
9367 B | ((offset + 4 - patch_off) & 0x3fffffc),
9368 contents + patch_off);
9369 patch_off += 4;
9370 }
9371 else
9372 {
9373 if (rel != NULL)
9374 {
9375 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9376
9377 relend[-1].r_offset += 8;
9378 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9379 }
9380 bfd_put_32 (input_bfd,
9381 (insn & ~0xfffc) | 8,
9382 contents + patch_off);
9383 patch_off += 4;
9384 bfd_put_32 (input_bfd,
9385 B | ((offset + 4 - patch_off) & 0x3fffffc),
9386 contents + patch_off);
9387 patch_off += 4;
9388 bfd_put_32 (input_bfd,
9389 B | ((delta - 8) & 0x3fffffc),
9390 contents + patch_off);
9391 patch_off += 4;
9392 }
9393 }
9394 else
9395 {
9396 bfd_put_32 (input_bfd, insn, contents + patch_off);
9397 patch_off += 4;
9398 bfd_put_32 (input_bfd,
9399 B | ((offset + 4 - patch_off) & 0x3fffffc),
9400 contents + patch_off);
9401 patch_off += 4;
9402 }
9403 BFD_ASSERT (patch_off <= input_section->size);
9404 relax_info->workaround_size = input_section->size - patch_off;
9405 }
9406 }
9407
9408 return ret;
9409 }
9410
9411 /* Write out the PLT relocs and entries for H. */
9413
9414 static bfd_boolean
9415 write_global_sym_plt (struct elf_link_hash_entry *h, void *inf)
9416 {
9417 struct bfd_link_info *info = (struct bfd_link_info *) inf;
9418 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9419 struct plt_entry *ent;
9420 bfd_boolean doneone;
9421
9422 doneone = FALSE;
9423 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9424 if (ent->plt.offset != (bfd_vma) -1)
9425 {
9426 if (!doneone)
9427 {
9428 Elf_Internal_Rela rela;
9429 bfd_byte *loc;
9430 bfd_vma reloc_index;
9431 asection *plt = htab->elf.splt;
9432 asection *relplt = htab->elf.srelplt;
9433
9434 if (htab->plt_type == PLT_NEW
9435 || !htab->elf.dynamic_sections_created
9436 || h->dynindx == -1)
9437 reloc_index = ent->plt.offset / 4;
9438 else
9439 {
9440 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9441 / htab->plt_slot_size);
9442 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9443 && htab->plt_type == PLT_OLD)
9444 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9445 }
9446
9447 /* This symbol has an entry in the procedure linkage table.
9448 Set it up. */
9449 if (htab->plt_type == PLT_VXWORKS
9450 && htab->elf.dynamic_sections_created
9451 && h->dynindx != -1)
9452 {
9453 bfd_vma got_offset;
9454 const bfd_vma *plt_entry;
9455
9456 /* The first three entries in .got.plt are reserved. */
9457 got_offset = (reloc_index + 3) * 4;
9458
9459 /* Use the right PLT. */
9460 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
9461 : ppc_elf_vxworks_plt_entry;
9462
9463 /* Fill in the .plt on VxWorks. */
9464 if (bfd_link_pic (info))
9465 {
9466 bfd_put_32 (info->output_bfd,
9467 plt_entry[0] | PPC_HA (got_offset),
9468 plt->contents + ent->plt.offset + 0);
9469 bfd_put_32 (info->output_bfd,
9470 plt_entry[1] | PPC_LO (got_offset),
9471 plt->contents + ent->plt.offset + 4);
9472 }
9473 else
9474 {
9475 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9476
9477 bfd_put_32 (info->output_bfd,
9478 plt_entry[0] | PPC_HA (got_loc),
9479 plt->contents + ent->plt.offset + 0);
9480 bfd_put_32 (info->output_bfd,
9481 plt_entry[1] | PPC_LO (got_loc),
9482 plt->contents + ent->plt.offset + 4);
9483 }
9484
9485 bfd_put_32 (info->output_bfd, plt_entry[2],
9486 plt->contents + ent->plt.offset + 8);
9487 bfd_put_32 (info->output_bfd, plt_entry[3],
9488 plt->contents + ent->plt.offset + 12);
9489
9490 /* This instruction is an immediate load. The value loaded is
9491 the byte offset of the R_PPC_JMP_SLOT relocation from the
9492 start of the .rela.plt section. The value is stored in the
9493 low-order 16 bits of the load instruction. */
9494 /* NOTE: It appears that this is now an index rather than a
9495 prescaled offset. */
9496 bfd_put_32 (info->output_bfd,
9497 plt_entry[4] | reloc_index,
9498 plt->contents + ent->plt.offset + 16);
9499 /* This instruction is a PC-relative branch whose target is
9500 the start of the PLT section. The address of this branch
9501 instruction is 20 bytes beyond the start of this PLT entry.
9502 The address is encoded in bits 6-29, inclusive. The value
9503 stored is right-shifted by two bits, permitting a 26-bit
9504 offset. */
9505 bfd_put_32 (info->output_bfd,
9506 (plt_entry[5]
9507 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9508 plt->contents + ent->plt.offset + 20);
9509 bfd_put_32 (info->output_bfd, plt_entry[6],
9510 plt->contents + ent->plt.offset + 24);
9511 bfd_put_32 (info->output_bfd, plt_entry[7],
9512 plt->contents + ent->plt.offset + 28);
9513
9514 /* Fill in the GOT entry corresponding to this PLT slot with
9515 the address immediately after the "bctr" instruction
9516 in this PLT entry. */
9517 bfd_put_32 (info->output_bfd, (plt->output_section->vma
9518 + plt->output_offset
9519 + ent->plt.offset + 16),
9520 htab->elf.sgotplt->contents + got_offset);
9521
9522 if (!bfd_link_pic (info))
9523 {
9524 /* Fill in a couple of entries in .rela.plt.unloaded. */
9525 loc = htab->srelplt2->contents
9526 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9527 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9528 * sizeof (Elf32_External_Rela));
9529
9530 /* Provide the @ha relocation for the first instruction. */
9531 rela.r_offset = (plt->output_section->vma
9532 + plt->output_offset
9533 + ent->plt.offset + 2);
9534 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9535 R_PPC_ADDR16_HA);
9536 rela.r_addend = got_offset;
9537 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9538 loc += sizeof (Elf32_External_Rela);
9539
9540 /* Provide the @l relocation for the second instruction. */
9541 rela.r_offset = (plt->output_section->vma
9542 + plt->output_offset
9543 + ent->plt.offset + 6);
9544 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9545 R_PPC_ADDR16_LO);
9546 rela.r_addend = got_offset;
9547 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9548 loc += sizeof (Elf32_External_Rela);
9549
9550 /* Provide a relocation for the GOT entry corresponding to this
9551 PLT slot. Point it at the middle of the .plt entry. */
9552 rela.r_offset = (htab->elf.sgotplt->output_section->vma
9553 + htab->elf.sgotplt->output_offset
9554 + got_offset);
9555 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9556 R_PPC_ADDR32);
9557 rela.r_addend = ent->plt.offset + 16;
9558 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9559 }
9560
9561 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9562 In particular, the offset for the relocation is not the
9563 address of the PLT entry for this function, as specified
9564 by the ABI. Instead, the offset is set to the address of
9565 the GOT slot for this function. See EABI 4.4.4.1. */
9566 rela.r_offset = (htab->elf.sgotplt->output_section->vma
9567 + htab->elf.sgotplt->output_offset
9568 + got_offset);
9569 rela.r_addend = 0;
9570 }
9571 else
9572 {
9573 rela.r_addend = 0;
9574 if (!htab->elf.dynamic_sections_created
9575 || h->dynindx == -1)
9576 {
9577 if (h->type == STT_GNU_IFUNC)
9578 {
9579 plt = htab->elf.iplt;
9580 relplt = htab->elf.irelplt;
9581 }
9582 else
9583 {
9584 plt = htab->pltlocal;
9585 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
9586 }
9587 if (h->def_regular
9588 && (h->root.type == bfd_link_hash_defined
9589 || h->root.type == bfd_link_hash_defweak))
9590 rela.r_addend = SYM_VAL (h);
9591 }
9592
9593 if (relplt == NULL)
9594 {
9595 loc = plt->contents + ent->plt.offset;
9596 bfd_put_32 (info->output_bfd, rela.r_addend, loc);
9597 }
9598 else
9599 {
9600 rela.r_offset = (plt->output_section->vma
9601 + plt->output_offset
9602 + ent->plt.offset);
9603
9604 if (htab->plt_type == PLT_OLD
9605 || !htab->elf.dynamic_sections_created
9606 || h->dynindx == -1)
9607 {
9608 /* We don't need to fill in the .plt. The ppc dynamic
9609 linker will fill it in. */
9610 }
9611 else
9612 {
9613 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9614 + htab->glink->output_section->vma
9615 + htab->glink->output_offset);
9616 bfd_put_32 (info->output_bfd, val,
9617 plt->contents + ent->plt.offset);
9618 }
9619 }
9620 }
9621
9622 if (relplt != NULL)
9623 {
9624 /* Fill in the entry in the .rela.plt section. */
9625 if (!htab->elf.dynamic_sections_created
9626 || h->dynindx == -1)
9627 {
9628 if (h->type == STT_GNU_IFUNC)
9629 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9630 else
9631 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9632 loc = relplt->contents + (relplt->reloc_count++
9633 * sizeof (Elf32_External_Rela));
9634 htab->local_ifunc_resolver = 1;
9635 }
9636 else
9637 {
9638 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9639 loc = relplt->contents + (reloc_index
9640 * sizeof (Elf32_External_Rela));
9641 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
9642 htab->maybe_local_ifunc_resolver = 1;
9643 }
9644 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9645 }
9646 doneone = TRUE;
9647 }
9648
9649 if (htab->plt_type == PLT_NEW
9650 || !htab->elf.dynamic_sections_created
9651 || h->dynindx == -1)
9652 {
9653 unsigned char *p;
9654 asection *plt = htab->elf.splt;
9655
9656 if (!htab->elf.dynamic_sections_created
9657 || h->dynindx == -1)
9658 {
9659 if (h->type == STT_GNU_IFUNC)
9660 plt = htab->elf.iplt;
9661 else
9662 break;
9663 }
9664
9665 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9666 write_glink_stub (h, ent, plt, p, info);
9667
9668 if (!bfd_link_pic (info))
9669 /* We only need one non-PIC glink stub. */
9670 break;
9671 }
9672 else
9673 break;
9674 }
9675 return TRUE;
9676 }
9677
9678 /* Finish up PLT handling. */
9679
9680 bfd_boolean
9681 ppc_finish_symbols (struct bfd_link_info *info)
9682 {
9683 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9684 bfd *ibfd;
9685
9686 if (!htab)
9687 return TRUE;
9688
9689 elf_link_hash_traverse (&htab->elf, write_global_sym_plt, info);
9690
9691 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9692 {
9693 bfd_vma *local_got, *end_local_got;
9694 struct plt_entry **local_plt, **lplt, **end_local_plt;
9695 Elf_Internal_Shdr *symtab_hdr;
9696 bfd_size_type locsymcount;
9697 Elf_Internal_Sym *local_syms = NULL;
9698 struct plt_entry *ent;
9699
9700 if (!is_ppc_elf (ibfd))
9701 continue;
9702
9703 local_got = elf_local_got_offsets (ibfd);
9704 if (!local_got)
9705 continue;
9706
9707 symtab_hdr = &elf_symtab_hdr (ibfd);
9708 locsymcount = symtab_hdr->sh_info;
9709 end_local_got = local_got + locsymcount;
9710 local_plt = (struct plt_entry **) end_local_got;
9711 end_local_plt = local_plt + locsymcount;
9712 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
9713 for (ent = *lplt; ent != NULL; ent = ent->next)
9714 {
9715 if (ent->plt.offset != (bfd_vma) -1)
9716 {
9717 Elf_Internal_Sym *sym;
9718 asection *sym_sec;
9719 asection *plt, *relplt;
9720 bfd_byte *loc;
9721 bfd_vma val;
9722 Elf_Internal_Rela rela;
9723 unsigned char *p;
9724
9725 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
9726 lplt - local_plt, ibfd))
9727 {
9728 if (local_syms != NULL
9729 && symtab_hdr->contents != (unsigned char *) local_syms)
9730 free (local_syms);
9731 return FALSE;
9732 }
9733
9734 val = sym->st_value;
9735 if (sym_sec != NULL && sym_sec->output_section != NULL)
9736 val += sym_sec->output_offset + sym_sec->output_section->vma;
9737
9738 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9739 {
9740 htab->local_ifunc_resolver = 1;
9741 plt = htab->elf.iplt;
9742 relplt = htab->elf.irelplt;
9743 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9744 }
9745 else
9746 {
9747 plt = htab->pltlocal;
9748 if (bfd_link_pic (info))
9749 {
9750 relplt = htab->relpltlocal;
9751 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9752 }
9753 else
9754 {
9755 loc = plt->contents + ent->plt.offset;
9756 bfd_put_32 (info->output_bfd, val, loc);
9757 continue;
9758 }
9759 }
9760
9761 rela.r_offset = (ent->plt.offset
9762 + plt->output_offset
9763 + plt->output_section->vma);
9764 rela.r_addend = val;
9765 loc = relplt->contents + (relplt->reloc_count++
9766 * sizeof (Elf32_External_Rela));
9767 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
9768
9769 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9770 write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
9771 }
9772 }
9773
9774 if (local_syms != NULL
9775 && symtab_hdr->contents != (unsigned char *) local_syms)
9776 {
9777 if (!info->keep_memory)
9778 free (local_syms);
9779 else
9780 symtab_hdr->contents = (unsigned char *) local_syms;
9781 }
9782 }
9783 return TRUE;
9784 }
9785
9786 /* Finish up dynamic symbol handling. We set the contents of various
9787 dynamic sections here. */
9788
9789 static bfd_boolean
9790 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9791 struct bfd_link_info *info,
9792 struct elf_link_hash_entry *h,
9793 Elf_Internal_Sym *sym)
9794 {
9795 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9796 struct plt_entry *ent;
9797
9798 #ifdef DEBUG
9799 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9800 h->root.root.string);
9801 #endif
9802
9803 if (!h->def_regular
9804 || (h->type == STT_GNU_IFUNC && !bfd_link_pic (info)))
9805 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9806 if (ent->plt.offset != (bfd_vma) -1)
9807 {
9808 if (!h->def_regular)
9809 {
9810 /* Mark the symbol as undefined, rather than as
9811 defined in the .plt section. Leave the value if
9812 there were any relocations where pointer equality
9813 matters (this is a clue for the dynamic linker, to
9814 make function pointer comparisons work between an
9815 application and shared library), otherwise set it
9816 to zero. */
9817 sym->st_shndx = SHN_UNDEF;
9818 if (!h->pointer_equality_needed)
9819 sym->st_value = 0;
9820 else if (!h->ref_regular_nonweak)
9821 {
9822 /* This breaks function pointer comparisons, but
9823 that is better than breaking tests for a NULL
9824 function pointer. */
9825 sym->st_value = 0;
9826 }
9827 }
9828 else
9829 {
9830 /* Set the value of ifunc symbols in a non-pie
9831 executable to the glink entry. This is to avoid
9832 text relocations. We can't do this for ifunc in
9833 allocate_dynrelocs, as we do for normal dynamic
9834 function symbols with plt entries, because we need
9835 to keep the original value around for the ifunc
9836 relocation. */
9837 sym->st_shndx
9838 = (_bfd_elf_section_from_bfd_section
9839 (info->output_bfd, htab->glink->output_section));
9840 sym->st_value = (ent->glink_offset
9841 + htab->glink->output_offset
9842 + htab->glink->output_section->vma);
9843 }
9844 break;
9845 }
9846
9847 if (h->needs_copy)
9848 {
9849 asection *s;
9850 Elf_Internal_Rela rela;
9851 bfd_byte *loc;
9852
9853 /* This symbols needs a copy reloc. Set it up. */
9854
9855 #ifdef DEBUG
9856 fprintf (stderr, ", copy");
9857 #endif
9858
9859 BFD_ASSERT (h->dynindx != -1);
9860
9861 if (ppc_elf_hash_entry (h)->has_sda_refs)
9862 s = htab->relsbss;
9863 else if (h->root.u.def.section == htab->elf.sdynrelro)
9864 s = htab->elf.sreldynrelro;
9865 else
9866 s = htab->elf.srelbss;
9867 BFD_ASSERT (s != NULL);
9868
9869 rela.r_offset = SYM_VAL (h);
9870 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9871 rela.r_addend = 0;
9872 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9873 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9874 }
9875
9876 #ifdef DEBUG
9877 fprintf (stderr, "\n");
9878 #endif
9879
9880 return TRUE;
9881 }
9882
9883 static enum elf_reloc_type_class
9885 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9886 const asection *rel_sec,
9887 const Elf_Internal_Rela *rela)
9888 {
9889 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9890
9891 if (rel_sec == htab->elf.irelplt)
9892 return reloc_class_ifunc;
9893
9894 switch (ELF32_R_TYPE (rela->r_info))
9895 {
9896 case R_PPC_RELATIVE:
9897 return reloc_class_relative;
9898 case R_PPC_JMP_SLOT:
9899 return reloc_class_plt;
9900 case R_PPC_COPY:
9901 return reloc_class_copy;
9902 default:
9903 return reloc_class_normal;
9904 }
9905 }
9906
9907 /* Finish up the dynamic sections. */
9909
9910 static bfd_boolean
9911 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9912 struct bfd_link_info *info)
9913 {
9914 asection *sdyn;
9915 struct ppc_elf_link_hash_table *htab;
9916 bfd_vma got;
9917 bfd *dynobj;
9918 bfd_boolean ret = TRUE;
9919
9920 #ifdef DEBUG
9921 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9922 #endif
9923
9924 htab = ppc_elf_hash_table (info);
9925 dynobj = htab->elf.dynobj;
9926 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9927
9928 got = 0;
9929 if (htab->elf.hgot != NULL)
9930 got = SYM_VAL (htab->elf.hgot);
9931
9932 if (htab->elf.dynamic_sections_created)
9933 {
9934 Elf32_External_Dyn *dyncon, *dynconend;
9935
9936 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
9937
9938 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9939 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9940 for (; dyncon < dynconend; dyncon++)
9941 {
9942 Elf_Internal_Dyn dyn;
9943 asection *s;
9944
9945 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9946
9947 switch (dyn.d_tag)
9948 {
9949 case DT_PLTGOT:
9950 if (htab->is_vxworks)
9951 s = htab->elf.sgotplt;
9952 else
9953 s = htab->elf.splt;
9954 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9955 break;
9956
9957 case DT_PLTRELSZ:
9958 dyn.d_un.d_val = htab->elf.srelplt->size;
9959 break;
9960
9961 case DT_JMPREL:
9962 s = htab->elf.srelplt;
9963 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9964 break;
9965
9966 case DT_PPC_GOT:
9967 dyn.d_un.d_ptr = got;
9968 break;
9969
9970 case DT_TEXTREL:
9971 if (htab->local_ifunc_resolver)
9972 info->callbacks->einfo
9973 (_("%X%P: text relocations and GNU indirect "
9974 "functions will result in a segfault at runtime\n"));
9975 else if (htab->maybe_local_ifunc_resolver)
9976 info->callbacks->einfo
9977 (_("%P: warning: text relocations and GNU indirect "
9978 "functions may result in a segfault at runtime\n"));
9979 continue;
9980
9981 default:
9982 if (htab->is_vxworks
9983 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9984 break;
9985 continue;
9986 }
9987
9988 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9989 }
9990 }
9991
9992 if (htab->elf.sgot != NULL
9993 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
9994 {
9995 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
9996 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
9997 {
9998 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9999
10000 p += htab->elf.hgot->root.u.def.value;
10001 if (htab->plt_type == PLT_OLD)
10002 {
10003 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10004 so that a function can easily find the address of
10005 _GLOBAL_OFFSET_TABLE_. */
10006 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10007 < htab->elf.hgot->root.u.def.section->size);
10008 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10009 }
10010
10011 if (sdyn != NULL)
10012 {
10013 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10014 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10015 < htab->elf.hgot->root.u.def.section->size);
10016 bfd_put_32 (output_bfd, val, p);
10017 }
10018 }
10019 else
10020 {
10021 /* xgettext:c-format */
10022 _bfd_error_handler (_("%s not defined in linker created %pA"),
10023 htab->elf.hgot->root.root.string,
10024 (htab->elf.sgotplt != NULL
10025 ? htab->elf.sgotplt : htab->elf.sgot));
10026 bfd_set_error (bfd_error_bad_value);
10027 ret = FALSE;
10028 }
10029
10030 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10031 }
10032
10033 /* Fill in the first entry in the VxWorks procedure linkage table. */
10034 if (htab->is_vxworks
10035 && htab->elf.splt != NULL
10036 && htab->elf.splt->size != 0
10037 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10038 {
10039 asection *splt = htab->elf.splt;
10040 /* Use the right PLT. */
10041 const bfd_vma *plt_entry = (bfd_link_pic (info)
10042 ? ppc_elf_vxworks_pic_plt0_entry
10043 : ppc_elf_vxworks_plt0_entry);
10044
10045 if (!bfd_link_pic (info))
10046 {
10047 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10048
10049 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10050 splt->contents + 0);
10051 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10052 splt->contents + 4);
10053 }
10054 else
10055 {
10056 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10057 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10058 }
10059 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10060 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10061 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10062 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10063 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10064 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10065
10066 if (! bfd_link_pic (info))
10067 {
10068 Elf_Internal_Rela rela;
10069 bfd_byte *loc;
10070
10071 loc = htab->srelplt2->contents;
10072
10073 /* Output the @ha relocation for the first instruction. */
10074 rela.r_offset = (htab->elf.splt->output_section->vma
10075 + htab->elf.splt->output_offset
10076 + 2);
10077 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10078 rela.r_addend = 0;
10079 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10080 loc += sizeof (Elf32_External_Rela);
10081
10082 /* Output the @l relocation for the second instruction. */
10083 rela.r_offset = (htab->elf.splt->output_section->vma
10084 + htab->elf.splt->output_offset
10085 + 6);
10086 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10087 rela.r_addend = 0;
10088 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10089 loc += sizeof (Elf32_External_Rela);
10090
10091 /* Fix up the remaining relocations. They may have the wrong
10092 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10093 in which symbols were output. */
10094 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10095 {
10096 Elf_Internal_Rela rel;
10097
10098 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10099 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10100 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10101 loc += sizeof (Elf32_External_Rela);
10102
10103 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10104 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10105 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10106 loc += sizeof (Elf32_External_Rela);
10107
10108 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10109 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10110 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10111 loc += sizeof (Elf32_External_Rela);
10112 }
10113 }
10114 }
10115
10116 if (htab->glink != NULL
10117 && htab->glink->contents != NULL
10118 && htab->elf.dynamic_sections_created)
10119 {
10120 unsigned char *p;
10121 unsigned char *endp;
10122 bfd_vma res0;
10123
10124 /*
10125 * PIC glink code is the following:
10126 *
10127 * # ith PLT code stub.
10128 * addis 11,30,(plt+(i-1)*4-got)@ha
10129 * lwz 11,(plt+(i-1)*4-got)@l(11)
10130 * mtctr 11
10131 * bctr
10132 *
10133 * # A table of branches, one for each plt entry.
10134 * # The idea is that the plt call stub loads ctr and r11 with these
10135 * # addresses, so (r11 - res_0) gives the plt index * 4.
10136 * res_0: b PLTresolve
10137 * res_1: b PLTresolve
10138 * .
10139 * # Some number of entries towards the end can be nops
10140 * res_n_m3: nop
10141 * res_n_m2: nop
10142 * res_n_m1:
10143 *
10144 * PLTresolve:
10145 * addis 11,11,(1f-res_0)@ha
10146 * mflr 0
10147 * bcl 20,31,1f
10148 * 1: addi 11,11,(1b-res_0)@l
10149 * mflr 12
10150 * mtlr 0
10151 * sub 11,11,12 # r11 = index * 4
10152 * addis 12,12,(got+4-1b)@ha
10153 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10154 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10155 * mtctr 0
10156 * add 0,11,11
10157 * add 11,0,11 # r11 = index * 12 = reloc offset.
10158 * bctr
10159 *
10160 * Non-PIC glink code is a little simpler.
10161 *
10162 * # ith PLT code stub.
10163 * lis 11,(plt+(i-1)*4)@ha
10164 * lwz 11,(plt+(i-1)*4)@l(11)
10165 * mtctr 11
10166 * bctr
10167 *
10168 * The branch table is the same, then comes
10169 *
10170 * PLTresolve:
10171 * lis 12,(got+4)@ha
10172 * addis 11,11,(-res_0)@ha
10173 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10174 * addi 11,11,(-res_0)@l # r11 = index * 4
10175 * mtctr 0
10176 * add 0,11,11
10177 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10178 * add 11,0,11 # r11 = index * 12 = reloc offset.
10179 * bctr
10180 */
10181
10182 /* Build the branch table, one for each plt entry (less one),
10183 and perhaps some padding. */
10184 p = htab->glink->contents;
10185 p += htab->glink_pltresolve;
10186 endp = htab->glink->contents;
10187 endp += htab->glink->size - GLINK_PLTRESOLVE;
10188 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10189 {
10190 bfd_put_32 (output_bfd, B + endp - p, p);
10191 p += 4;
10192 }
10193 while (p < endp)
10194 {
10195 bfd_put_32 (output_bfd, NOP, p);
10196 p += 4;
10197 }
10198
10199 res0 = (htab->glink_pltresolve
10200 + htab->glink->output_section->vma
10201 + htab->glink->output_offset);
10202
10203 if (htab->params->ppc476_workaround)
10204 {
10205 /* Ensure that a call stub at the end of a page doesn't
10206 result in prefetch over the end of the page into the
10207 glink branch table. */
10208 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10209 bfd_vma page_addr;
10210 bfd_vma glink_start = (htab->glink->output_section->vma
10211 + htab->glink->output_offset);
10212
10213 for (page_addr = res0 & -pagesize;
10214 page_addr > glink_start;
10215 page_addr -= pagesize)
10216 {
10217 /* We have a plt call stub that may need fixing. */
10218 bfd_byte *loc;
10219 unsigned int insn;
10220
10221 loc = htab->glink->contents + page_addr - 4 - glink_start;
10222 insn = bfd_get_32 (output_bfd, loc);
10223 if (insn == BCTR)
10224 {
10225 /* By alignment, we know that there must be at least
10226 one other call stub before this one. */
10227 insn = bfd_get_32 (output_bfd, loc - 16);
10228 if (insn == BCTR)
10229 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10230 else
10231 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10232 }
10233 }
10234 }
10235
10236 /* Last comes the PLTresolve stub. */
10237 endp = p + GLINK_PLTRESOLVE;
10238 if (bfd_link_pic (info))
10239 {
10240 bfd_vma bcl;
10241
10242 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10243 + htab->glink->output_section->vma
10244 + htab->glink->output_offset);
10245
10246 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
10247 p += 4;
10248 bfd_put_32 (output_bfd, MFLR_0, p);
10249 p += 4;
10250 bfd_put_32 (output_bfd, BCL_20_31, p);
10251 p += 4;
10252 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
10253 p += 4;
10254 bfd_put_32 (output_bfd, MFLR_12, p);
10255 p += 4;
10256 bfd_put_32 (output_bfd, MTLR_0, p);
10257 p += 4;
10258 bfd_put_32 (output_bfd, SUB_11_11_12, p);
10259 p += 4;
10260 bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
10261 p += 4;
10262 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10263 {
10264 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
10265 p += 4;
10266 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
10267 p += 4;
10268 }
10269 else
10270 {
10271 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
10272 p += 4;
10273 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
10274 p += 4;
10275 }
10276 bfd_put_32 (output_bfd, MTCTR_0, p);
10277 p += 4;
10278 bfd_put_32 (output_bfd, ADD_0_11_11, p);
10279 }
10280 else
10281 {
10282 bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
10283 p += 4;
10284 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
10285 p += 4;
10286 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10287 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
10288 else
10289 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
10290 p += 4;
10291 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
10292 p += 4;
10293 bfd_put_32 (output_bfd, MTCTR_0, p);
10294 p += 4;
10295 bfd_put_32 (output_bfd, ADD_0_11_11, p);
10296 p += 4;
10297 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10298 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
10299 else
10300 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
10301 }
10302 p += 4;
10303 bfd_put_32 (output_bfd, ADD_11_0_11, p);
10304 p += 4;
10305 bfd_put_32 (output_bfd, BCTR, p);
10306 p += 4;
10307 while (p < endp)
10308 {
10309 bfd_put_32 (output_bfd,
10310 htab->params->ppc476_workaround ? BA : NOP, p);
10311 p += 4;
10312 }
10313 BFD_ASSERT (p == endp);
10314 }
10315
10316 if (htab->glink_eh_frame != NULL
10317 && htab->glink_eh_frame->contents != NULL)
10318 {
10319 unsigned char *p = htab->glink_eh_frame->contents;
10320 bfd_vma val;
10321
10322 p += sizeof (glink_eh_frame_cie);
10323 /* FDE length. */
10324 p += 4;
10325 /* CIE pointer. */
10326 p += 4;
10327 /* Offset to .glink. */
10328 val = (htab->glink->output_section->vma
10329 + htab->glink->output_offset);
10330 val -= (htab->glink_eh_frame->output_section->vma
10331 + htab->glink_eh_frame->output_offset);
10332 val -= p - htab->glink_eh_frame->contents;
10333 bfd_put_32 (htab->elf.dynobj, val, p);
10334
10335 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10336 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10337 htab->glink_eh_frame,
10338 htab->glink_eh_frame->contents))
10339 return FALSE;
10340 }
10341
10342 return ret;
10343 }
10344
10345 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10347 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10348 #define TARGET_BIG_SYM powerpc_elf32_vec
10349 #define TARGET_BIG_NAME "elf32-powerpc"
10350 #define ELF_ARCH bfd_arch_powerpc
10351 #define ELF_TARGET_ID PPC32_ELF_DATA
10352 #define ELF_MACHINE_CODE EM_PPC
10353 #define ELF_MAXPAGESIZE 0x10000
10354 #define ELF_COMMONPAGESIZE 0x1000
10355 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
10356 #define elf_info_to_howto ppc_elf_info_to_howto
10357
10358 #ifdef EM_CYGNUS_POWERPC
10359 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10360 #endif
10361
10362 #ifdef EM_PPC_OLD
10363 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10364 #endif
10365
10366 #define elf_backend_plt_not_loaded 1
10367 #define elf_backend_want_dynrelro 1
10368 #define elf_backend_can_gc_sections 1
10369 #define elf_backend_can_refcount 1
10370 #define elf_backend_rela_normal 1
10371 #define elf_backend_caches_rawsize 1
10372
10373 #define bfd_elf32_mkobject ppc_elf_mkobject
10374 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10375 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10376 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10377 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10378 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10379 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10380 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10381
10382 #define elf_backend_object_p ppc_elf_object_p
10383 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10384 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10385 #define elf_backend_relocate_section ppc_elf_relocate_section
10386 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10387 #define elf_backend_check_relocs ppc_elf_check_relocs
10388 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
10389 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10390 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10391 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10392 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10393 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10394 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10395 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10396 #define elf_backend_fake_sections ppc_elf_fake_sections
10397 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10398 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10399 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10400 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10401 #define elf_backend_write_core_note ppc_elf_write_core_note
10402 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10403 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10404 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10405 #define elf_backend_write_section ppc_elf_write_section
10406 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10407 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10408 #define elf_backend_action_discarded ppc_elf_action_discarded
10409 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10410 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10411
10412 #include "elf32-target.h"
10413
10414 /* FreeBSD Target */
10415
10416 #undef TARGET_LITTLE_SYM
10417 #undef TARGET_LITTLE_NAME
10418
10419 #undef TARGET_BIG_SYM
10420 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10421 #undef TARGET_BIG_NAME
10422 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10423
10424 #undef ELF_OSABI
10425 #define ELF_OSABI ELFOSABI_FREEBSD
10426
10427 #undef elf32_bed
10428 #define elf32_bed elf32_powerpc_fbsd_bed
10429
10430 #include "elf32-target.h"
10431
10432 /* VxWorks Target */
10433
10434 #undef TARGET_LITTLE_SYM
10435 #undef TARGET_LITTLE_NAME
10436
10437 #undef TARGET_BIG_SYM
10438 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10439 #undef TARGET_BIG_NAME
10440 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10441
10442 #undef ELF_OSABI
10443
10444 /* VxWorks uses the elf default section flags for .plt. */
10445 static const struct bfd_elf_special_section *
10446 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10447 {
10448 if (sec->name == NULL)
10449 return NULL;
10450
10451 if (strcmp (sec->name, ".plt") == 0)
10452 return _bfd_elf_get_sec_type_attr (abfd, sec);
10453
10454 return ppc_elf_get_sec_type_attr (abfd, sec);
10455 }
10456
10457 /* Like ppc_elf_link_hash_table_create, but overrides
10458 appropriately for VxWorks. */
10459 static struct bfd_link_hash_table *
10460 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10461 {
10462 struct bfd_link_hash_table *ret;
10463
10464 ret = ppc_elf_link_hash_table_create (abfd);
10465 if (ret)
10466 {
10467 struct ppc_elf_link_hash_table *htab
10468 = (struct ppc_elf_link_hash_table *)ret;
10469 htab->is_vxworks = 1;
10470 htab->plt_type = PLT_VXWORKS;
10471 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10472 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10473 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10474 }
10475 return ret;
10476 }
10477
10478 /* Tweak magic VxWorks symbols as they are loaded. */
10479 static bfd_boolean
10480 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10481 struct bfd_link_info *info,
10482 Elf_Internal_Sym *sym,
10483 const char **namep,
10484 flagword *flagsp,
10485 asection **secp,
10486 bfd_vma *valp)
10487 {
10488 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
10489 valp))
10490 return FALSE;
10491
10492 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
10493 }
10494
10495 static bfd_boolean
10496 ppc_elf_vxworks_final_write_processing (bfd *abfd)
10497 {
10498 ppc_final_write_processing (abfd);
10499 return elf_vxworks_final_write_processing (abfd);
10500 }
10501
10502 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10503 define it. */
10504 #undef elf_backend_want_plt_sym
10505 #define elf_backend_want_plt_sym 1
10506 #undef elf_backend_want_got_plt
10507 #define elf_backend_want_got_plt 1
10508 #undef elf_backend_got_symbol_offset
10509 #define elf_backend_got_symbol_offset 0
10510 #undef elf_backend_plt_not_loaded
10511 #define elf_backend_plt_not_loaded 0
10512 #undef elf_backend_plt_readonly
10513 #define elf_backend_plt_readonly 1
10514 #undef elf_backend_got_header_size
10515 #define elf_backend_got_header_size 12
10516 #undef elf_backend_dtrel_excludes_plt
10517 #define elf_backend_dtrel_excludes_plt 1
10518
10519 #undef bfd_elf32_get_synthetic_symtab
10520
10521 #undef bfd_elf32_bfd_link_hash_table_create
10522 #define bfd_elf32_bfd_link_hash_table_create \
10523 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