elf32-cris.c revision 1.1.1.9 1 1.1 skrll /* CRIS-specific support for 32-bit ELF.
2 1.1.1.9 christos Copyright (C) 2000-2022 Free Software Foundation, Inc.
3 1.1 skrll Contributed by Axis Communications AB.
4 1.1 skrll Written by Hans-Peter Nilsson, based on elf32-fr30.c
5 1.1 skrll PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
6 1.1 skrll
7 1.1 skrll This file is part of BFD, the Binary File Descriptor library.
8 1.1 skrll
9 1.1 skrll This program is free software; you can redistribute it and/or modify
10 1.1 skrll it under the terms of the GNU General Public License as published by
11 1.1 skrll the Free Software Foundation; either version 3 of the License, or
12 1.1 skrll (at your option) any later version.
13 1.1 skrll
14 1.1 skrll This program is distributed in the hope that it will be useful,
15 1.1 skrll but WITHOUT ANY WARRANTY; without even the implied warranty of
16 1.1 skrll MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 1.1 skrll GNU General Public License for more details.
18 1.1 skrll
19 1.1 skrll You should have received a copy of the GNU General Public License
20 1.1 skrll along with this program; if not, write to the Free Software
21 1.1 skrll Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 1.1 skrll MA 02110-1301, USA. */
23 1.1 skrll
24 1.1 skrll #include "sysdep.h"
25 1.1 skrll #include "bfd.h"
26 1.1 skrll #include "libbfd.h"
27 1.1 skrll #include "elf-bfd.h"
28 1.1 skrll #include "elf/cris.h"
29 1.1.1.2 christos #include <limits.h>
30 1.1 skrll
31 1.1.1.3 christos bfd_reloc_status_type
32 1.1.1.3 christos cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *,
33 1.1.1.3 christos asection *, bfd *, char **);
34 1.1.1.9 christos static bool
35 1.1.1.3 christos cris_elf_set_mach_from_flags (bfd *, unsigned long);
36 1.1 skrll
37 1.1.1.3 christos /* Forward declarations. */
38 1.1 skrll static reloc_howto_type cris_elf_howto_table [] =
39 1.1 skrll {
40 1.1 skrll /* This reloc does nothing. */
41 1.1 skrll HOWTO (R_CRIS_NONE, /* type */
42 1.1 skrll 0, /* rightshift */
43 1.1.1.9 christos 0, /* size */
44 1.1.1.4 christos 0, /* bitsize */
45 1.1.1.9 christos false, /* pc_relative */
46 1.1 skrll 0, /* bitpos */
47 1.1.1.4 christos complain_overflow_dont, /* complain_on_overflow */
48 1.1 skrll bfd_elf_generic_reloc, /* special_function */
49 1.1 skrll "R_CRIS_NONE", /* name */
50 1.1.1.9 christos false, /* partial_inplace */
51 1.1 skrll 0, /* src_mask */
52 1.1 skrll 0, /* dst_mask */
53 1.1.1.9 christos false), /* pcrel_offset */
54 1.1 skrll
55 1.1 skrll /* An 8 bit absolute relocation. */
56 1.1 skrll HOWTO (R_CRIS_8, /* type */
57 1.1 skrll 0, /* rightshift */
58 1.1.1.9 christos 1, /* size */
59 1.1 skrll 8, /* bitsize */
60 1.1.1.9 christos false, /* pc_relative */
61 1.1 skrll 0, /* bitpos */
62 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
63 1.1 skrll bfd_elf_generic_reloc, /* special_function */
64 1.1 skrll "R_CRIS_8", /* name */
65 1.1.1.9 christos false, /* partial_inplace */
66 1.1 skrll 0x0000, /* src_mask */
67 1.1 skrll 0x00ff, /* dst_mask */
68 1.1.1.9 christos false), /* pcrel_offset */
69 1.1 skrll
70 1.1 skrll /* A 16 bit absolute relocation. */
71 1.1 skrll HOWTO (R_CRIS_16, /* type */
72 1.1 skrll 0, /* rightshift */
73 1.1.1.9 christos 2, /* size */
74 1.1 skrll 16, /* bitsize */
75 1.1.1.9 christos false, /* pc_relative */
76 1.1 skrll 0, /* bitpos */
77 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
78 1.1 skrll bfd_elf_generic_reloc, /* special_function */
79 1.1 skrll "R_CRIS_16", /* name */
80 1.1.1.9 christos false, /* partial_inplace */
81 1.1 skrll 0x00000000, /* src_mask */
82 1.1 skrll 0x0000ffff, /* dst_mask */
83 1.1.1.9 christos false), /* pcrel_offset */
84 1.1 skrll
85 1.1 skrll /* A 32 bit absolute relocation. */
86 1.1 skrll HOWTO (R_CRIS_32, /* type */
87 1.1 skrll 0, /* rightshift */
88 1.1.1.9 christos 4, /* size */
89 1.1 skrll 32, /* bitsize */
90 1.1.1.9 christos false, /* pc_relative */
91 1.1 skrll 0, /* bitpos */
92 1.1 skrll /* We don't want overflow complaints for 64-bit vma builds
93 1.1 skrll for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
94 1.1 skrll 32-bit ELF) where sym=0xc0001234.
95 1.1 skrll Don't do this for the PIC relocs, as we don't expect to
96 1.1 skrll see them with large offsets. */
97 1.1 skrll complain_overflow_dont, /* complain_on_overflow */
98 1.1 skrll bfd_elf_generic_reloc, /* special_function */
99 1.1 skrll "R_CRIS_32", /* name */
100 1.1.1.9 christos false, /* partial_inplace */
101 1.1 skrll 0x00000000, /* src_mask */
102 1.1 skrll 0xffffffff, /* dst_mask */
103 1.1.1.9 christos false), /* pcrel_offset */
104 1.1 skrll
105 1.1 skrll /* An 8 bit PC-relative relocation. */
106 1.1 skrll HOWTO (R_CRIS_8_PCREL, /* type */
107 1.1 skrll 0, /* rightshift */
108 1.1.1.9 christos 1, /* size */
109 1.1 skrll 8, /* bitsize */
110 1.1.1.9 christos true, /* pc_relative */
111 1.1 skrll 0, /* bitpos */
112 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
113 1.1 skrll cris_elf_pcrel_reloc, /* special_function */
114 1.1 skrll "R_CRIS_8_PCREL", /* name */
115 1.1.1.9 christos false, /* partial_inplace */
116 1.1 skrll 0x0000, /* src_mask */
117 1.1 skrll 0x00ff, /* dst_mask */
118 1.1.1.9 christos true), /* pcrel_offset */
119 1.1 skrll
120 1.1 skrll /* A 16 bit PC-relative relocation. */
121 1.1 skrll HOWTO (R_CRIS_16_PCREL, /* type */
122 1.1 skrll 0, /* rightshift */
123 1.1.1.9 christos 2, /* size */
124 1.1 skrll 16, /* bitsize */
125 1.1.1.9 christos true, /* pc_relative */
126 1.1 skrll 0, /* bitpos */
127 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
128 1.1 skrll cris_elf_pcrel_reloc, /* special_function */
129 1.1 skrll "R_CRIS_16_PCREL", /* name */
130 1.1.1.9 christos false, /* partial_inplace */
131 1.1 skrll 0x00000000, /* src_mask */
132 1.1 skrll 0x0000ffff, /* dst_mask */
133 1.1.1.9 christos true), /* pcrel_offset */
134 1.1 skrll
135 1.1 skrll /* A 32 bit PC-relative relocation. */
136 1.1 skrll HOWTO (R_CRIS_32_PCREL, /* type */
137 1.1 skrll 0, /* rightshift */
138 1.1.1.9 christos 4, /* size */
139 1.1 skrll 32, /* bitsize */
140 1.1.1.9 christos true, /* pc_relative */
141 1.1 skrll 0, /* bitpos */
142 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
143 1.1 skrll cris_elf_pcrel_reloc, /* special_function */
144 1.1 skrll "R_CRIS_32_PCREL", /* name */
145 1.1.1.9 christos false, /* partial_inplace */
146 1.1 skrll 0x00000000, /* src_mask */
147 1.1 skrll 0xffffffff, /* dst_mask */
148 1.1.1.9 christos true), /* pcrel_offset */
149 1.1 skrll
150 1.1 skrll /* GNU extension to record C++ vtable hierarchy. */
151 1.1 skrll HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
152 1.1 skrll 0, /* rightshift */
153 1.1.1.9 christos 4, /* size */
154 1.1 skrll 0, /* bitsize */
155 1.1.1.9 christos false, /* pc_relative */
156 1.1 skrll 0, /* bitpos */
157 1.1 skrll complain_overflow_dont, /* complain_on_overflow */
158 1.1 skrll NULL, /* special_function */
159 1.1 skrll "R_CRIS_GNU_VTINHERIT", /* name */
160 1.1.1.9 christos false, /* partial_inplace */
161 1.1 skrll 0, /* src_mask */
162 1.1 skrll 0, /* dst_mask */
163 1.1.1.9 christos false), /* pcrel_offset */
164 1.1 skrll
165 1.1 skrll /* GNU extension to record C++ vtable member usage. */
166 1.1 skrll HOWTO (R_CRIS_GNU_VTENTRY, /* type */
167 1.1 skrll 0, /* rightshift */
168 1.1.1.9 christos 4, /* size */
169 1.1 skrll 0, /* bitsize */
170 1.1.1.9 christos false, /* pc_relative */
171 1.1 skrll 0, /* bitpos */
172 1.1 skrll complain_overflow_dont, /* complain_on_overflow */
173 1.1 skrll _bfd_elf_rel_vtable_reloc_fn, /* special_function */
174 1.1 skrll "R_CRIS_GNU_VTENTRY", /* name */
175 1.1.1.9 christos false, /* partial_inplace */
176 1.1 skrll 0, /* src_mask */
177 1.1 skrll 0, /* dst_mask */
178 1.1.1.9 christos false), /* pcrel_offset */
179 1.1 skrll
180 1.1 skrll /* This is used only by the dynamic linker. The symbol should exist
181 1.1 skrll both in the object being run and in some shared library. The
182 1.1 skrll dynamic linker copies the data addressed by the symbol from the
183 1.1 skrll shared library into the object, because the object being
184 1.1 skrll run has to have the data at some particular address. */
185 1.1 skrll HOWTO (R_CRIS_COPY, /* type */
186 1.1 skrll 0, /* rightshift */
187 1.1.1.9 christos 4, /* size */
188 1.1 skrll 32, /* bitsize */
189 1.1.1.9 christos false, /* pc_relative */
190 1.1 skrll 0, /* bitpos */
191 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
192 1.1 skrll bfd_elf_generic_reloc, /* special_function */
193 1.1 skrll "R_CRIS_COPY", /* name */
194 1.1.1.9 christos false, /* partial_inplace */
195 1.1 skrll 0, /* src_mask */
196 1.1 skrll 0, /* dst_mask */
197 1.1.1.9 christos false), /* pcrel_offset */
198 1.1 skrll
199 1.1 skrll /* Like R_CRIS_32, but used when setting global offset table entries. */
200 1.1 skrll HOWTO (R_CRIS_GLOB_DAT, /* type */
201 1.1 skrll 0, /* rightshift */
202 1.1.1.9 christos 4, /* size */
203 1.1 skrll 32, /* bitsize */
204 1.1.1.9 christos false, /* pc_relative */
205 1.1 skrll 0, /* bitpos */
206 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
207 1.1 skrll bfd_elf_generic_reloc, /* special_function */
208 1.1 skrll "R_CRIS_GLOB_DAT", /* name */
209 1.1.1.9 christos false, /* partial_inplace */
210 1.1 skrll 0, /* src_mask */
211 1.1 skrll 0xffffffff, /* dst_mask */
212 1.1.1.9 christos false), /* pcrel_offset */
213 1.1 skrll
214 1.1 skrll /* Marks a procedure linkage table entry for a symbol. */
215 1.1 skrll HOWTO (R_CRIS_JUMP_SLOT, /* type */
216 1.1 skrll 0, /* rightshift */
217 1.1.1.9 christos 4, /* size */
218 1.1 skrll 32, /* bitsize */
219 1.1.1.9 christos false, /* pc_relative */
220 1.1 skrll 0, /* bitpos */
221 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
222 1.1 skrll bfd_elf_generic_reloc, /* special_function */
223 1.1 skrll "R_CRIS_JUMP_SLOT", /* name */
224 1.1.1.9 christos false, /* partial_inplace */
225 1.1 skrll 0, /* src_mask */
226 1.1 skrll 0, /* dst_mask */
227 1.1.1.9 christos false), /* pcrel_offset */
228 1.1 skrll
229 1.1 skrll /* Used only by the dynamic linker. When the object is run, this
230 1.1 skrll longword is set to the load address of the object, plus the
231 1.1 skrll addend. */
232 1.1 skrll HOWTO (R_CRIS_RELATIVE, /* type */
233 1.1 skrll 0, /* rightshift */
234 1.1.1.9 christos 4, /* size */
235 1.1 skrll 32, /* bitsize */
236 1.1.1.9 christos false, /* pc_relative */
237 1.1 skrll 0, /* bitpos */
238 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
239 1.1 skrll bfd_elf_generic_reloc, /* special_function */
240 1.1 skrll "R_CRIS_RELATIVE", /* name */
241 1.1.1.9 christos false, /* partial_inplace */
242 1.1 skrll 0, /* src_mask */
243 1.1 skrll 0xffffffff, /* dst_mask */
244 1.1.1.9 christos false), /* pcrel_offset */
245 1.1 skrll
246 1.1 skrll /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
247 1.1 skrll HOWTO (R_CRIS_16_GOT, /* type */
248 1.1 skrll 0, /* rightshift */
249 1.1.1.9 christos 2, /* size */
250 1.1 skrll 16, /* bitsize */
251 1.1.1.9 christos false, /* pc_relative */
252 1.1 skrll 0, /* bitpos */
253 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
254 1.1 skrll bfd_elf_generic_reloc, /* special_function */
255 1.1 skrll "R_CRIS_16_GOT", /* name */
256 1.1.1.9 christos false, /* partial_inplace */
257 1.1 skrll 0, /* src_mask */
258 1.1 skrll 0xffff, /* dst_mask */
259 1.1.1.9 christos false), /* pcrel_offset */
260 1.1 skrll
261 1.1 skrll HOWTO (R_CRIS_32_GOT, /* type */
262 1.1 skrll 0, /* rightshift */
263 1.1.1.9 christos 4, /* size */
264 1.1 skrll 32, /* bitsize */
265 1.1.1.9 christos false, /* pc_relative */
266 1.1 skrll 0, /* bitpos */
267 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
268 1.1 skrll bfd_elf_generic_reloc, /* special_function */
269 1.1 skrll "R_CRIS_32_GOT", /* name */
270 1.1.1.9 christos false, /* partial_inplace */
271 1.1 skrll 0, /* src_mask */
272 1.1 skrll 0xffffffff, /* dst_mask */
273 1.1.1.9 christos false), /* pcrel_offset */
274 1.1 skrll
275 1.1 skrll /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
276 1.1 skrll the GOT table for the symbol. */
277 1.1 skrll HOWTO (R_CRIS_16_GOTPLT, /* type */
278 1.1 skrll 0, /* rightshift */
279 1.1.1.9 christos 2, /* size */
280 1.1 skrll 16, /* bitsize */
281 1.1.1.9 christos false, /* pc_relative */
282 1.1 skrll 0, /* bitpos */
283 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
284 1.1 skrll bfd_elf_generic_reloc, /* special_function */
285 1.1 skrll "R_CRIS_16_GOTPLT", /* name */
286 1.1.1.9 christos false, /* partial_inplace */
287 1.1 skrll 0, /* src_mask */
288 1.1 skrll 0xffff, /* dst_mask */
289 1.1.1.9 christos false), /* pcrel_offset */
290 1.1 skrll
291 1.1 skrll HOWTO (R_CRIS_32_GOTPLT, /* type */
292 1.1 skrll 0, /* rightshift */
293 1.1.1.9 christos 4, /* size */
294 1.1 skrll 32, /* bitsize */
295 1.1.1.9 christos false, /* pc_relative */
296 1.1 skrll 0, /* bitpos */
297 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
298 1.1 skrll bfd_elf_generic_reloc, /* special_function */
299 1.1 skrll "R_CRIS_32_GOTPLT", /* name */
300 1.1.1.9 christos false, /* partial_inplace */
301 1.1 skrll 0, /* src_mask */
302 1.1 skrll 0xffffffff, /* dst_mask */
303 1.1.1.9 christos false), /* pcrel_offset */
304 1.1 skrll
305 1.1 skrll /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
306 1.1 skrll be necessary. */
307 1.1 skrll HOWTO (R_CRIS_32_GOTREL, /* type */
308 1.1 skrll 0, /* rightshift */
309 1.1.1.9 christos 4, /* size */
310 1.1 skrll 32, /* bitsize */
311 1.1.1.9 christos false, /* pc_relative */
312 1.1 skrll 0, /* bitpos */
313 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
314 1.1 skrll bfd_elf_generic_reloc, /* special_function */
315 1.1 skrll "R_CRIS_32_GOTREL", /* name */
316 1.1.1.9 christos false, /* partial_inplace */
317 1.1 skrll 0, /* src_mask */
318 1.1 skrll 0xffffffff, /* dst_mask */
319 1.1.1.9 christos false), /* pcrel_offset */
320 1.1 skrll
321 1.1 skrll /* A 32-bit offset from GOT to entry for this symbol in PLT and request
322 1.1 skrll to create PLT entry for symbol. */
323 1.1 skrll HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
324 1.1 skrll 0, /* rightshift */
325 1.1.1.9 christos 4, /* size */
326 1.1 skrll 32, /* bitsize */
327 1.1.1.9 christos false, /* pc_relative */
328 1.1 skrll 0, /* bitpos */
329 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
330 1.1 skrll bfd_elf_generic_reloc, /* special_function */
331 1.1 skrll "R_CRIS_32_PLT_GOTREL", /* name */
332 1.1.1.9 christos false, /* partial_inplace */
333 1.1 skrll 0, /* src_mask */
334 1.1 skrll 0xffffffff, /* dst_mask */
335 1.1.1.9 christos false), /* pcrel_offset */
336 1.1 skrll
337 1.1 skrll /* A 32-bit offset from PC (location after the relocation) + addend to
338 1.1 skrll entry for this symbol in PLT and request to create PLT entry for
339 1.1 skrll symbol. */
340 1.1 skrll HOWTO (R_CRIS_32_PLT_PCREL, /* type */
341 1.1 skrll 0, /* rightshift */
342 1.1.1.9 christos 4, /* size */
343 1.1 skrll 32, /* bitsize */
344 1.1.1.9 christos true, /* pc_relative */
345 1.1 skrll 0, /* bitpos */
346 1.1 skrll complain_overflow_bitfield, /* complain_on_overflow */
347 1.1 skrll cris_elf_pcrel_reloc, /* special_function */
348 1.1 skrll "R_CRIS_32_PLT_PCREL", /* name */
349 1.1.1.9 christos false, /* partial_inplace */
350 1.1 skrll 0, /* src_mask */
351 1.1 skrll 0xffffffff, /* dst_mask */
352 1.1.1.9 christos true), /* pcrel_offset */
353 1.1.1.2 christos
354 1.1.1.2 christos /* We don't handle these in any special manner and cross-format
355 1.1.1.2 christos linking is not supported; just recognize them enough to pass them
356 1.1.1.2 christos around. FIXME: do the same for most PIC relocs and add sanity
357 1.1.1.2 christos tests to actually refuse gracefully to handle these and PIC
358 1.1.1.2 christos relocs for cross-format linking. */
359 1.1.1.2 christos #define TLSHOWTO32(name) \
360 1.1.1.9 christos HOWTO (name, 0, 4, 32, false, 0, complain_overflow_bitfield, \
361 1.1.1.9 christos bfd_elf_generic_reloc, #name, false, 0, 0xffffffff, false)
362 1.1.1.2 christos #define TLSHOWTO16X(name, X) \
363 1.1.1.9 christos HOWTO (name, 0, 2, 16, false, 0, complain_overflow_ ## X, \
364 1.1.1.9 christos bfd_elf_generic_reloc, #name, false, 0, 0xffff, false)
365 1.1.1.2 christos #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
366 1.1.1.2 christos #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
367 1.1.1.2 christos
368 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_GOT_GD),
369 1.1.1.2 christos TLSHOWTO16 (R_CRIS_16_GOT_GD),
370 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_GD),
371 1.1.1.2 christos TLSHOWTO32 (R_CRIS_DTP),
372 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_DTPREL),
373 1.1.1.2 christos TLSHOWTO16S (R_CRIS_16_DTPREL),
374 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
375 1.1.1.2 christos TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
376 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_TPREL),
377 1.1.1.2 christos TLSHOWTO16S (R_CRIS_16_TPREL),
378 1.1.1.2 christos TLSHOWTO32 (R_CRIS_DTPMOD),
379 1.1.1.2 christos TLSHOWTO32 (R_CRIS_32_IE)
380 1.1 skrll };
381 1.1 skrll
382 1.1 skrll /* Map BFD reloc types to CRIS ELF reloc types. */
384 1.1 skrll
385 1.1 skrll struct cris_reloc_map
386 1.1 skrll {
387 1.1 skrll bfd_reloc_code_real_type bfd_reloc_val;
388 1.1 skrll unsigned int cris_reloc_val;
389 1.1 skrll };
390 1.1 skrll
391 1.1 skrll static const struct cris_reloc_map cris_reloc_map [] =
392 1.1 skrll {
393 1.1 skrll { BFD_RELOC_NONE, R_CRIS_NONE },
394 1.1 skrll { BFD_RELOC_8, R_CRIS_8 },
395 1.1 skrll { BFD_RELOC_16, R_CRIS_16 },
396 1.1 skrll { BFD_RELOC_32, R_CRIS_32 },
397 1.1 skrll { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
398 1.1 skrll { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
399 1.1 skrll { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
400 1.1 skrll { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
401 1.1 skrll { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
402 1.1 skrll { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
403 1.1 skrll { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
404 1.1 skrll { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
405 1.1 skrll { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
406 1.1 skrll { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
407 1.1 skrll { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
408 1.1 skrll { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
409 1.1 skrll { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
410 1.1 skrll { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
411 1.1.1.2 christos { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
412 1.1.1.2 christos { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
413 1.1.1.2 christos { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD },
414 1.1.1.2 christos { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD },
415 1.1.1.2 christos { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD },
416 1.1.1.2 christos { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
417 1.1.1.2 christos { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL },
418 1.1.1.2 christos { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL },
419 1.1.1.2 christos { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
420 1.1.1.2 christos { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
421 1.1.1.2 christos { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL },
422 1.1.1.2 christos { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL },
423 1.1.1.2 christos { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD },
424 1.1 skrll { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE }
425 1.1 skrll };
426 1.1 skrll
427 1.1.1.3 christos static reloc_howto_type *
428 1.1.1.3 christos cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
429 1.1 skrll bfd_reloc_code_real_type code)
430 1.1 skrll {
431 1.1 skrll unsigned int i;
432 1.1 skrll
433 1.1 skrll for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
434 1.1 skrll if (cris_reloc_map [i].bfd_reloc_val == code)
435 1.1 skrll return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
436 1.1 skrll
437 1.1 skrll return NULL;
438 1.1 skrll }
439 1.1 skrll
440 1.1 skrll static reloc_howto_type *
441 1.1 skrll cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
442 1.1 skrll {
443 1.1 skrll unsigned int i;
444 1.1 skrll
445 1.1 skrll for (i = 0;
446 1.1 skrll i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
447 1.1 skrll i++)
448 1.1 skrll if (cris_elf_howto_table[i].name != NULL
449 1.1 skrll && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
450 1.1 skrll return &cris_elf_howto_table[i];
451 1.1 skrll
452 1.1 skrll return NULL;
453 1.1 skrll }
454 1.1 skrll
455 1.1 skrll /* Set the howto pointer for an CRIS ELF reloc. */
456 1.1.1.9 christos
457 1.1.1.3 christos static bool
458 1.1.1.3 christos cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
459 1.1.1.3 christos arelent * cache_ptr,
460 1.1 skrll Elf_Internal_Rela * dst)
461 1.1.1.2 christos {
462 1.1 skrll enum elf_cris_reloc_type r_type;
463 1.1 skrll
464 1.1.1.4 christos r_type = ELF32_R_TYPE (dst->r_info);
465 1.1.1.4 christos if (r_type >= R_CRIS_max)
466 1.1.1.6 christos {
467 1.1.1.7 christos /* xgettext:c-format */
468 1.1.1.7 christos _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
469 1.1.1.7 christos abfd, r_type);
470 1.1.1.9 christos bfd_set_error (bfd_error_bad_value);
471 1.1.1.4 christos return false;
472 1.1 skrll }
473 1.1.1.9 christos cache_ptr->howto = & cris_elf_howto_table [r_type];
474 1.1 skrll return true;
475 1.1 skrll }
476 1.1 skrll
477 1.1.1.3 christos bfd_reloc_status_type
478 1.1.1.3 christos cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
479 1.1.1.3 christos arelent *reloc_entry,
480 1.1.1.3 christos asymbol *symbol,
481 1.1.1.3 christos void * data ATTRIBUTE_UNUSED,
482 1.1.1.3 christos asection *input_section,
483 1.1.1.3 christos bfd *output_bfd,
484 1.1 skrll char **error_message ATTRIBUTE_UNUSED)
485 1.1 skrll {
486 1.1 skrll /* By default (using only bfd_elf_generic_reloc when linking to
487 1.1 skrll non-ELF formats) PC-relative relocs are relative to the beginning
488 1.1 skrll of the reloc. CRIS PC-relative relocs are relative to the position
489 1.1 skrll *after* the reloc because that's what pre-CRISv32 PC points to
490 1.1 skrll after reading an insn field with that reloc. (For CRISv32, PC is
491 1.1 skrll actually relative to the start of the insn, but we keep the old
492 1.1 skrll definition.) Still, we use as much generic machinery as we can.
493 1.1 skrll
494 1.1 skrll Only adjust when doing a final link. */
495 1.1.1.9 christos if (output_bfd == (bfd *) NULL)
496 1.1 skrll reloc_entry->addend -= bfd_get_reloc_size (reloc_entry->howto);
497 1.1 skrll
498 1.1 skrll return
499 1.1 skrll bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
500 1.1 skrll input_section, output_bfd, error_message);
501 1.1 skrll }
502 1.1 skrll
503 1.1 skrll /* Support for core dump NOTE sections.
505 1.1 skrll The slightly unintuitive code layout is an attempt to keep at least
506 1.1 skrll some similarities with other ports, hoping to simplify general
507 1.1.1.9 christos changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
508 1.1.1.3 christos
509 1.1 skrll static bool
510 1.1 skrll cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
511 1.1 skrll {
512 1.1 skrll int offset;
513 1.1 skrll size_t size;
514 1.1 skrll
515 1.1 skrll if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
516 1.1 skrll switch (note->descsz)
517 1.1.1.9 christos {
518 1.1 skrll default:
519 1.1 skrll return false;
520 1.1 skrll
521 1.1.1.4 christos case 202: /* Linux/CRISv32 */
522 1.1 skrll /* pr_cursig */
523 1.1 skrll elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
524 1.1.1.4 christos
525 1.1 skrll /* pr_pid */
526 1.1 skrll elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
527 1.1 skrll
528 1.1 skrll /* pr_reg */
529 1.1 skrll offset = 70;
530 1.1 skrll size = 128;
531 1.1 skrll
532 1.1 skrll break;
533 1.1 skrll }
534 1.1 skrll else
535 1.1 skrll switch (note->descsz)
536 1.1.1.9 christos {
537 1.1 skrll default:
538 1.1 skrll return false;
539 1.1 skrll
540 1.1.1.4 christos case 214: /* Linux/CRIS */
541 1.1 skrll /* pr_cursig */
542 1.1 skrll elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
543 1.1.1.4 christos
544 1.1 skrll /* pr_pid */
545 1.1 skrll elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
546 1.1 skrll
547 1.1 skrll /* pr_reg */
548 1.1 skrll offset = 70;
549 1.1 skrll size = 140;
550 1.1 skrll
551 1.1 skrll break;
552 1.1 skrll }
553 1.1 skrll
554 1.1 skrll /* Make a ".reg/999" section. */
555 1.1 skrll return _bfd_elfcore_make_pseudosection (abfd, ".reg",
556 1.1 skrll size, note->descpos + offset);
557 1.1.1.9 christos }
558 1.1.1.3 christos
559 1.1 skrll static bool
560 1.1 skrll cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
561 1.1 skrll {
562 1.1 skrll if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
563 1.1 skrll switch (note->descsz)
564 1.1.1.9 christos {
565 1.1 skrll default:
566 1.1 skrll return false;
567 1.1.1.4 christos
568 1.1 skrll case 124: /* Linux/CRISv32 elf_prpsinfo */
569 1.1.1.4 christos elf_tdata (abfd)->core->program
570 1.1 skrll = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
571 1.1 skrll elf_tdata (abfd)->core->command
572 1.1 skrll = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
573 1.1 skrll }
574 1.1 skrll else
575 1.1 skrll switch (note->descsz)
576 1.1.1.9 christos {
577 1.1 skrll default:
578 1.1 skrll return false;
579 1.1.1.4 christos
580 1.1 skrll case 124: /* Linux/CRIS elf_prpsinfo */
581 1.1.1.4 christos elf_tdata (abfd)->core->program
582 1.1 skrll = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
583 1.1 skrll elf_tdata (abfd)->core->command
584 1.1 skrll = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
585 1.1 skrll }
586 1.1 skrll
587 1.1 skrll /* Note that for some reason, a spurious space is tacked
588 1.1 skrll onto the end of the args in some (at least one anyway)
589 1.1 skrll implementations, so strip it off if it exists. */
590 1.1.1.4 christos
591 1.1 skrll {
592 1.1 skrll char *command = elf_tdata (abfd)->core->command;
593 1.1 skrll int n = strlen (command);
594 1.1 skrll
595 1.1 skrll if (0 < n && command[n - 1] == ' ')
596 1.1 skrll command[n - 1] = '\0';
597 1.1.1.9 christos }
598 1.1 skrll
599 1.1 skrll return true;
600 1.1 skrll }
601 1.1 skrll
602 1.1 skrll /* The name of the dynamic interpreter. This is put in the .interp
604 1.1 skrll section. */
605 1.1 skrll
606 1.1 skrll #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
607 1.1 skrll
608 1.1 skrll /* The size in bytes of an entry in the procedure linkage table. */
609 1.1 skrll
610 1.1 skrll #define PLT_ENTRY_SIZE 20
611 1.1 skrll #define PLT_ENTRY_SIZE_V32 26
612 1.1 skrll
613 1.1 skrll /* The first entry in an absolute procedure linkage table looks like this. */
614 1.1 skrll
615 1.1 skrll static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
616 1.1 skrll {
617 1.1 skrll 0xfc, 0xe1,
618 1.1 skrll 0x7e, 0x7e, /* push mof. */
619 1.1 skrll 0x7f, 0x0d, /* (dip [pc+]) */
620 1.1 skrll 0, 0, 0, 0, /* Replaced with address of .got + 4. */
621 1.1 skrll 0x30, 0x7a, /* move [...],mof */
622 1.1 skrll 0x7f, 0x0d, /* (dip [pc+]) */
623 1.1 skrll 0, 0, 0, 0, /* Replaced with address of .got + 8. */
624 1.1 skrll 0x30, 0x09 /* jump [...] */
625 1.1 skrll };
626 1.1 skrll
627 1.1 skrll static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
628 1.1 skrll {
629 1.1 skrll 0x84, 0xe2, /* subq 4,$sp */
630 1.1 skrll 0x6f, 0xfe, /* move.d 0,$acr */
631 1.1 skrll 0, 0, 0, 0, /* Replaced by address of .got + 4. */
632 1.1 skrll 0x7e, 0x7a, /* move $mof,[$sp] */
633 1.1 skrll 0x3f, 0x7a, /* move [$acr],$mof */
634 1.1 skrll 0x04, 0xf2, /* addq 4,acr */
635 1.1 skrll 0x6f, 0xfa, /* move.d [$acr],$acr */
636 1.1 skrll 0xbf, 0x09, /* jump $acr */
637 1.1 skrll 0xb0, 0x05, /* nop */
638 1.1 skrll 0, 0 /* Pad out to 26 bytes. */
639 1.1 skrll };
640 1.1 skrll
641 1.1 skrll /* Subsequent entries in an absolute procedure linkage table look like
642 1.1 skrll this. */
643 1.1 skrll
644 1.1 skrll static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
645 1.1 skrll {
646 1.1 skrll 0x7f, 0x0d, /* (dip [pc+]) */
647 1.1 skrll 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
648 1.1 skrll 0x30, 0x09, /* jump [...] */
649 1.1 skrll 0x3f, 0x7e, /* move [pc+],mof */
650 1.1 skrll 0, 0, 0, 0, /* Replaced with offset into relocation table. */
651 1.1 skrll 0x2f, 0xfe, /* add.d [pc+],pc */
652 1.1 skrll 0xec, 0xff,
653 1.1 skrll 0xff, 0xff /* Replaced with offset to start of .plt. */
654 1.1 skrll };
655 1.1 skrll
656 1.1 skrll static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
657 1.1 skrll {
658 1.1 skrll 0x6f, 0xfe, /* move.d 0,$acr */
659 1.1 skrll 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
660 1.1 skrll 0x6f, 0xfa, /* move.d [$acr],$acr */
661 1.1 skrll 0xbf, 0x09, /* jump $acr */
662 1.1 skrll 0xb0, 0x05, /* nop */
663 1.1 skrll 0x3f, 0x7e, /* move 0,mof */
664 1.1 skrll 0, 0, 0, 0, /* Replaced with offset into relocation table. */
665 1.1 skrll 0xbf, 0x0e, /* ba start_of_plt0_entry */
666 1.1 skrll 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
667 1.1 skrll 0xb0, 0x05 /* nop */
668 1.1 skrll };
669 1.1 skrll
670 1.1 skrll /* The first entry in a PIC procedure linkage table looks like this. */
671 1.1 skrll
672 1.1 skrll static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
673 1.1 skrll {
674 1.1 skrll 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
675 1.1 skrll 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
676 1.1 skrll 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
677 1.1 skrll 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
678 1.1 skrll };
679 1.1 skrll
680 1.1 skrll static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
681 1.1 skrll {
682 1.1 skrll 0x84, 0xe2, /* subq 4,$sp */
683 1.1 skrll 0x04, 0x01, /* addoq 4,$r0,$acr */
684 1.1 skrll 0x7e, 0x7a, /* move $mof,[$sp] */
685 1.1 skrll 0x3f, 0x7a, /* move [$acr],$mof */
686 1.1 skrll 0x04, 0xf2, /* addq 4,$acr */
687 1.1 skrll 0x6f, 0xfa, /* move.d [$acr],$acr */
688 1.1 skrll 0xbf, 0x09, /* jump $acr */
689 1.1 skrll 0xb0, 0x05, /* nop */
690 1.1 skrll 0, 0, /* Pad out to 26 bytes. */
691 1.1 skrll 0, 0, 0, 0,
692 1.1 skrll 0, 0, 0, 0
693 1.1 skrll };
694 1.1 skrll
695 1.1 skrll /* Subsequent entries in a PIC procedure linkage table look like this. */
696 1.1 skrll
697 1.1 skrll static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
698 1.1 skrll {
699 1.1 skrll 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
700 1.1 skrll 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
701 1.1 skrll 0x30, 0x09, /* jump [...] */
702 1.1 skrll 0x3f, 0x7e, /* move [pc+],mof */
703 1.1 skrll 0, 0, 0, 0, /* Replaced with offset into relocation table. */
704 1.1 skrll 0x2f, 0xfe, /* add.d [pc+],pc */
705 1.1 skrll 0xec, 0xff, /* Replaced with offset to start of .plt. */
706 1.1 skrll 0xff, 0xff
707 1.1 skrll };
708 1.1 skrll
709 1.1 skrll static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
710 1.1 skrll {
711 1.1 skrll 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
712 1.1 skrll 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
713 1.1 skrll 0x6f, 0xfa, /* move.d [$acr],$acr */
714 1.1 skrll 0xbf, 0x09, /* jump $acr */
715 1.1 skrll 0xb0, 0x05, /* nop */
716 1.1 skrll 0x3f, 0x7e, /* move relocoffs,$mof */
717 1.1 skrll 0, 0, 0, 0, /* Replaced with offset into relocation table. */
718 1.1 skrll 0xbf, 0x0e, /* ba start_of_plt */
719 1.1 skrll 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
720 1.1 skrll 0xb0, 0x05 /* nop */
721 1.1 skrll };
722 1.1 skrll
723 1.1 skrll /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
725 1.1 skrll (and most other PIC/shlib stuff). Check that we don't drift away
726 1.1 skrll without reason.
727 1.1 skrll
728 1.1 skrll The CRIS linker, like the m68k and i386 linkers (and probably the rest
729 1.1 skrll too) needs to keep track of the number of relocs that it decides to
730 1.1 skrll copy in check_relocs for each symbol. This is so that it can discard
731 1.1 skrll PC relative relocs if it doesn't need them when linking with
732 1.1 skrll -Bsymbolic. We store the information in a field extending the regular
733 1.1 skrll ELF linker hash table. */
734 1.1 skrll
735 1.1 skrll /* This structure keeps track of the number of PC relative relocs we have
736 1.1 skrll copied for a given symbol. */
737 1.1 skrll
738 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied
739 1.1 skrll {
740 1.1 skrll /* Next section. */
741 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied *next;
742 1.1 skrll
743 1.1 skrll /* A section in dynobj. */
744 1.1.1.2 christos asection *section;
745 1.1.1.2 christos
746 1.1.1.2 christos /* Number of relocs copied in this section. */
747 1.1 skrll bfd_size_type count;
748 1.1 skrll
749 1.1 skrll /* Example of reloc being copied, for message. */
750 1.1 skrll enum elf_cris_reloc_type r_type;
751 1.1 skrll };
752 1.1 skrll
753 1.1 skrll /* CRIS ELF linker hash entry. */
754 1.1 skrll
755 1.1 skrll struct elf_cris_link_hash_entry
756 1.1 skrll {
757 1.1 skrll struct elf_link_hash_entry root;
758 1.1 skrll
759 1.1 skrll /* Number of PC relative relocs copied for this symbol. */
760 1.1 skrll struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
761 1.1 skrll
762 1.1 skrll /* The GOTPLT references are CRIS-specific; the goal is to avoid having
763 1.1 skrll both a general GOT and a PLT-specific GOT entry for the same symbol,
764 1.1 skrll when it is referenced both as a function and as a function pointer.
765 1.1 skrll
766 1.1 skrll Number of GOTPLT references for a function. */
767 1.1 skrll bfd_signed_vma gotplt_refcount;
768 1.1 skrll
769 1.1 skrll /* Actual GOTPLT index for this symbol, if applicable, or zero if not
770 1.1.1.2 christos (zero is never used as an index). FIXME: We should be able to fold
771 1.1.1.2 christos this with gotplt_refcount in a union, like the got and plt unions in
772 1.1.1.2 christos elf_link_hash_entry. */
773 1.1.1.2 christos bfd_size_type gotplt_offset;
774 1.1.1.2 christos
775 1.1.1.2 christos /* The root.got.refcount is the sum of the regular reference counts
776 1.1.1.2 christos (this) and those members below. We have to keep a separate count
777 1.1.1.2 christos to track when we've found the first (or last) reference to a
778 1.1.1.2 christos regular got entry. The offset is in root.got.offset. */
779 1.1.1.2 christos bfd_signed_vma reg_got_refcount;
780 1.1.1.2 christos
781 1.1.1.2 christos /* Similar to the above, the number of reloc references to this
782 1.1.1.2 christos symbols that need a R_CRIS_32_TPREL slot. The offset is in
783 1.1.1.2 christos root.got.offset, because this and .dtp_refcount can't validly
784 1.1.1.2 christos happen when there's also a regular GOT entry; that's invalid
785 1.1.1.2 christos input for which an error is emitted. */
786 1.1.1.2 christos bfd_signed_vma tprel_refcount;
787 1.1.1.2 christos
788 1.1 skrll /* Similar to the above, the number of reloc references to this
789 1.1 skrll symbols that need a R_CRIS_DTP slot. The offset is in
790 1.1.1.9 christos root.got.offset; plus 4 if .tprel_refcount > 0. */
791 1.1.1.3 christos bfd_signed_vma dtp_refcount;
792 1.1.1.3 christos };
793 1.1.1.9 christos
794 1.1.1.3 christos static bool
795 1.1.1.3 christos elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
796 1.1.1.3 christos void * );
797 1.1.1.2 christos static bool
798 1.1.1.2 christos elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
799 1.1.1.2 christos void *);
800 1.1.1.2 christos
801 1.1.1.2 christos /* The local_got_refcounts and local_got_offsets are a multiple of
802 1.1.1.2 christos LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
803 1.1.1.2 christos refcount for GOT itself, see code), with the summary / group offset
804 1.1.1.2 christos for local symbols located at offset N, reference counts for
805 1.1.1.2 christos ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
806 1.1.1.2 christos relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
807 1.1.1.2 christos 3*LSNUM. */
808 1.1.1.2 christos
809 1.1.1.2 christos #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
810 1.1 skrll #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
811 1.1 skrll #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
812 1.1 skrll #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
813 1.1 skrll
814 1.1 skrll /* CRIS ELF linker hash table. */
815 1.1 skrll
816 1.1 skrll struct elf_cris_link_hash_table
817 1.1 skrll {
818 1.1 skrll struct elf_link_hash_table root;
819 1.1 skrll
820 1.1.1.2 christos /* We can't use the PLT offset and calculate to get the GOTPLT offset,
821 1.1.1.2 christos since we try and avoid creating GOTPLT:s when there's already a GOT.
822 1.1.1.2 christos Instead, we keep and update the next available index here. */
823 1.1.1.2 christos bfd_size_type next_gotplt_entry;
824 1.1.1.2 christos
825 1.1.1.2 christos /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
826 1.1.1.2 christos been seen for any input; if != 0, then the constant-offset
827 1.1 skrll R_CRIS_DTPMOD is needed for this DSO/executable. This turns
828 1.1 skrll negative at relocation, so that we don't need an extra flag for
829 1.1 skrll when the reloc is output. */
830 1.1 skrll bfd_signed_vma dtpmod_refcount;
831 1.1 skrll };
832 1.1 skrll
833 1.1 skrll /* Traverse a CRIS ELF linker hash table. */
834 1.1.1.9 christos
835 1.1 skrll #define elf_cris_link_hash_traverse(table, func, info) \
836 1.1 skrll (elf_link_hash_traverse \
837 1.1 skrll (&(table)->root, \
838 1.1 skrll (bool (*) (struct elf_link_hash_entry *, void *)) (func), \
839 1.1 skrll (info)))
840 1.1.1.9 christos
841 1.1.1.9 christos /* Get the CRIS ELF linker hash table from a link_info structure. */
842 1.1.1.9 christos
843 1.1.1.2 christos #define elf_cris_hash_table(p) \
844 1.1.1.2 christos ((is_elf_hash_table ((p)->hash) \
845 1.1.1.2 christos && elf_hash_table_id (elf_hash_table (p)) == CRIS_ELF_DATA) \
846 1.1.1.2 christos ? (struct elf_cris_link_hash_table *) (p)->hash : NULL)
847 1.1.1.2 christos
848 1.1.1.2 christos /* Get the CRIS ELF linker hash entry from a regular hash entry (the
849 1.1.1.2 christos "parent class"). The .root reference is just a simple type
850 1.1 skrll check on the argument. */
851 1.1 skrll
852 1.1 skrll #define elf_cris_hash_entry(p) \
853 1.1 skrll ((struct elf_cris_link_hash_entry *) (&(p)->root))
854 1.1.1.2 christos
855 1.1.1.2 christos /* Create an entry in a CRIS ELF linker hash table. */
856 1.1.1.2 christos
857 1.1 skrll static struct bfd_hash_entry *
858 1.1 skrll elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
859 1.1 skrll struct bfd_hash_table *table,
860 1.1 skrll const char *string)
861 1.1 skrll {
862 1.1 skrll struct elf_cris_link_hash_entry *ret =
863 1.1 skrll (struct elf_cris_link_hash_entry *) entry;
864 1.1 skrll
865 1.1 skrll /* Allocate the structure if it has not already been allocated by a
866 1.1 skrll subclass. */
867 1.1 skrll if (ret == (struct elf_cris_link_hash_entry *) NULL)
868 1.1 skrll ret = ((struct elf_cris_link_hash_entry *)
869 1.1 skrll bfd_hash_allocate (table,
870 1.1 skrll sizeof (struct elf_cris_link_hash_entry)));
871 1.1 skrll if (ret == (struct elf_cris_link_hash_entry *) NULL)
872 1.1 skrll return (struct bfd_hash_entry *) ret;
873 1.1 skrll
874 1.1 skrll /* Call the allocation method of the superclass. */
875 1.1 skrll ret = ((struct elf_cris_link_hash_entry *)
876 1.1 skrll _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
877 1.1 skrll table, string));
878 1.1 skrll if (ret != (struct elf_cris_link_hash_entry *) NULL)
879 1.1.1.2 christos {
880 1.1.1.2 christos ret->pcrel_relocs_copied = NULL;
881 1.1.1.2 christos ret->gotplt_refcount = 0;
882 1.1 skrll ret->gotplt_offset = 0;
883 1.1 skrll ret->dtp_refcount = 0;
884 1.1 skrll ret->tprel_refcount = 0;
885 1.1 skrll ret->reg_got_refcount = 0;
886 1.1 skrll }
887 1.1 skrll
888 1.1 skrll return (struct bfd_hash_entry *) ret;
889 1.1 skrll }
890 1.1.1.2 christos
891 1.1 skrll /* Create a CRIS ELF linker hash table. */
892 1.1 skrll
893 1.1.1.9 christos static struct bfd_link_hash_table *
894 1.1 skrll elf_cris_link_hash_table_create (bfd *abfd)
895 1.1.1.4 christos {
896 1.1 skrll struct elf_cris_link_hash_table *ret;
897 1.1 skrll size_t amt = sizeof (struct elf_cris_link_hash_table);
898 1.1 skrll
899 1.1 skrll ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
900 1.1 skrll if (ret == (struct elf_cris_link_hash_table *) NULL)
901 1.1.1.2 christos return NULL;
902 1.1.1.2 christos
903 1.1 skrll if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
904 1.1 skrll elf_cris_link_hash_newfunc,
905 1.1 skrll sizeof (struct elf_cris_link_hash_entry),
906 1.1 skrll CRIS_ELF_DATA))
907 1.1 skrll {
908 1.1 skrll free (ret);
909 1.1 skrll return NULL;
910 1.1 skrll }
911 1.1 skrll
912 1.1 skrll /* Initialize to skip over the first three entries in the gotplt; they
913 1.1 skrll are used for run-time symbol evaluation. */
914 1.1 skrll ret->next_gotplt_entry = 12;
915 1.1 skrll
916 1.1 skrll return &ret->root.root;
917 1.1 skrll }
918 1.1 skrll
919 1.1.1.3 christos /* Perform a single relocation. By default we use the standard BFD
921 1.1.1.6 christos routines, with a few tweaks. */
922 1.1.1.6 christos
923 1.1.1.3 christos static bfd_reloc_status_type
924 1.1.1.6 christos cris_final_link_relocate (reloc_howto_type * howto,
925 1.1 skrll bfd * input_bfd,
926 1.1 skrll asection * input_section,
927 1.1.1.2 christos bfd_byte * contents,
928 1.1 skrll Elf_Internal_Rela * rel,
929 1.1 skrll bfd_vma relocation)
930 1.1 skrll {
931 1.1 skrll bfd_reloc_status_type r;
932 1.1.1.2 christos enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
933 1.1 skrll
934 1.1 skrll /* PC-relative relocations are relative to the position *after*
935 1.1 skrll the reloc. Note that for R_CRIS_8_PCREL the adjustment is
936 1.1 skrll not a single byte, since PC must be 16-bit-aligned. */
937 1.1 skrll switch (r_type)
938 1.1 skrll {
939 1.1 skrll /* Check that the 16-bit GOT relocs are positive. */
940 1.1 skrll case R_CRIS_16_GOTPLT:
941 1.1 skrll case R_CRIS_16_GOT:
942 1.1 skrll if ((bfd_signed_vma) relocation < 0)
943 1.1 skrll return bfd_reloc_overflow;
944 1.1 skrll break;
945 1.1 skrll
946 1.1 skrll case R_CRIS_32_PLT_PCREL:
947 1.1 skrll case R_CRIS_32_PCREL:
948 1.1 skrll relocation -= 2;
949 1.1 skrll /* Fall through. */
950 1.1 skrll case R_CRIS_8_PCREL:
951 1.1 skrll case R_CRIS_16_PCREL:
952 1.1 skrll relocation -= 2;
953 1.1 skrll break;
954 1.1 skrll
955 1.1 skrll default:
956 1.1 skrll break;
957 1.1 skrll }
958 1.1 skrll
959 1.1 skrll r = _bfd_final_link_relocate (howto, input_bfd, input_section,
960 1.1.1.2 christos contents, rel->r_offset,
961 1.1.1.2 christos relocation, rel->r_addend);
962 1.1.1.2 christos return r;
963 1.1.1.2 christos }
964 1.1.1.2 christos
965 1.1.1.2 christos
967 1.1.1.2 christos /* The number of errors left before we stop outputting reloc-specific
968 1.1 skrll explanatory messages. By coincidence, this works nicely together
969 1.1 skrll with the default number of messages you'll get from LD about
970 1.1 skrll "relocation truncated to fit" messages before you get an
971 1.1.1.9 christos "additional relocation overflows omitted from the output". */
972 1.1.1.2 christos static int additional_relocation_error_msg_count = 10;
973 1.1.1.2 christos
974 1.1.1.2 christos /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
975 1.1.1.2 christos copied, for further comments. */
976 1.1.1.2 christos
977 1.1.1.2 christos static int
978 1.1.1.2 christos cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
979 1.1.1.2 christos struct bfd_link_info *info,
980 1.1 skrll bfd *input_bfd,
981 1.1.1.2 christos asection *input_section,
982 1.1 skrll bfd_byte *contents,
983 1.1 skrll Elf_Internal_Rela *relocs,
984 1.1 skrll Elf_Internal_Sym *local_syms,
985 1.1 skrll asection **local_sections)
986 1.1 skrll {
987 1.1 skrll struct elf_cris_link_hash_table * htab;
988 1.1 skrll bfd *dynobj;
989 1.1 skrll Elf_Internal_Shdr *symtab_hdr;
990 1.1 skrll struct elf_link_hash_entry **sym_hashes;
991 1.1.1.2 christos bfd_vma *local_got_offsets;
992 1.1.1.2 christos asection *sgot;
993 1.1.1.2 christos asection *splt;
994 1.1.1.2 christos asection *sreloc;
995 1.1.1.9 christos Elf_Internal_Rela *rel;
996 1.1 skrll Elf_Internal_Rela *relend;
997 1.1.1.6 christos asection *srelgot;
998 1.1 skrll
999 1.1 skrll htab = elf_cris_hash_table (info);
1000 1.1 skrll if (htab == NULL)
1001 1.1 skrll return false;
1002 1.1 skrll
1003 1.1 skrll dynobj = htab->root.dynobj;
1004 1.1 skrll local_got_offsets = elf_local_got_offsets (input_bfd);
1005 1.1 skrll symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1006 1.1.1.2 christos sym_hashes = elf_sym_hashes (input_bfd);
1007 1.1 skrll relend = relocs + input_section->reloc_count;
1008 1.1 skrll
1009 1.1 skrll sgot = NULL;
1010 1.1.1.6 christos splt = NULL;
1011 1.1.1.6 christos sreloc = NULL;
1012 1.1 skrll srelgot = NULL;
1013 1.1 skrll
1014 1.1 skrll if (dynobj != NULL)
1015 1.1 skrll {
1016 1.1 skrll splt = htab->root.splt;
1017 1.1 skrll sgot = htab->root.sgot;
1018 1.1 skrll }
1019 1.1 skrll
1020 1.1 skrll for (rel = relocs; rel < relend; rel ++)
1021 1.1 skrll {
1022 1.1 skrll reloc_howto_type *howto;
1023 1.1 skrll unsigned long r_symndx;
1024 1.1.1.2 christos Elf_Internal_Sym *sym;
1025 1.1.1.9 christos asection *sec;
1026 1.1 skrll struct elf_link_hash_entry *h;
1027 1.1 skrll bfd_vma relocation;
1028 1.1 skrll bfd_reloc_status_type r;
1029 1.1 skrll const char *symname = NULL;
1030 1.1 skrll enum elf_cris_reloc_type r_type;
1031 1.1 skrll bool resolved_to_zero;
1032 1.1 skrll
1033 1.1 skrll r_type = ELF32_R_TYPE (rel->r_info);
1034 1.1 skrll
1035 1.1 skrll if ( r_type == R_CRIS_GNU_VTINHERIT
1036 1.1 skrll || r_type == R_CRIS_GNU_VTENTRY)
1037 1.1 skrll continue;
1038 1.1 skrll
1039 1.1 skrll r_symndx = ELF32_R_SYM (rel->r_info);
1040 1.1 skrll howto = cris_elf_howto_table + r_type;
1041 1.1 skrll h = NULL;
1042 1.1 skrll sym = NULL;
1043 1.1 skrll sec = NULL;
1044 1.1 skrll
1045 1.1 skrll if (r_symndx < symtab_hdr->sh_info)
1046 1.1 skrll {
1047 1.1 skrll sym = local_syms + r_symndx;
1048 1.1.1.8 christos sec = local_sections [r_symndx];
1049 1.1 skrll relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1050 1.1 skrll
1051 1.1 skrll symname = (bfd_elf_string_from_elf_section
1052 1.1.1.9 christos (input_bfd, symtab_hdr->sh_link, sym->st_name));
1053 1.1.1.9 christos if (symname == NULL)
1054 1.1 skrll symname = bfd_section_name (sec);
1055 1.1 skrll }
1056 1.1 skrll else
1057 1.1 skrll {
1058 1.1.1.4 christos bool warned, ignored;
1059 1.1 skrll bool unresolved_reloc;
1060 1.1.1.2 christos
1061 1.1.1.2 christos RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1062 1.1 skrll r_symndx, symtab_hdr, sym_hashes,
1063 1.1 skrll h, sec, relocation,
1064 1.1 skrll unresolved_reloc, warned, ignored);
1065 1.1 skrll
1066 1.1 skrll symname = h->root.root.string;
1067 1.1 skrll
1068 1.1 skrll if (unresolved_reloc
1069 1.1 skrll /* Perhaps we should detect the cases that
1070 1.1 skrll sec->output_section is expected to be NULL like i386 and
1071 1.1 skrll m68k, but apparently (and according to elfxx-ia64.c) all
1072 1.1 skrll valid cases are where the symbol is defined in a shared
1073 1.1 skrll object which we link dynamically against. This includes
1074 1.1 skrll PLT relocs for which we've created a PLT entry and other
1075 1.1 skrll relocs for which we're prepared to create dynamic
1076 1.1 skrll relocations.
1077 1.1 skrll
1078 1.1 skrll For now, new situations cause us to just err when
1079 1.1 skrll sec->output_offset is NULL but the object with the symbol
1080 1.1 skrll is *not* dynamically linked against. Thus this will
1081 1.1 skrll automatically remind us so we can see if there are other
1082 1.1 skrll valid cases we need to revisit. */
1083 1.1 skrll && (sec->owner->flags & DYNAMIC) != 0)
1084 1.1 skrll relocation = 0;
1085 1.1 skrll
1086 1.1 skrll else if (h->root.type == bfd_link_hash_defined
1087 1.1 skrll || h->root.type == bfd_link_hash_defweak)
1088 1.1 skrll {
1089 1.1 skrll /* Here follow the cases where the relocation value must
1090 1.1 skrll be zero (or when further handling is simplified when
1091 1.1 skrll zero). I can't claim to understand the various
1092 1.1 skrll conditions and they weren't described in the files
1093 1.1 skrll where I copied them from (elf32-m68k.c and
1094 1.1 skrll elf32-i386.c), but let's mention examples of where
1095 1.1 skrll they happen. FIXME: Perhaps define and use a
1096 1.1 skrll dynamic_symbol_p function like ia64.
1097 1.1 skrll
1098 1.1 skrll - When creating a shared library, we can have an
1099 1.1 skrll ordinary relocation for a symbol defined in a shared
1100 1.1 skrll library (perhaps the one we create). We then make
1101 1.1.1.4 christos the relocation value zero, as the value seen now will
1102 1.1.1.4 christos be added into the relocation addend in this shared
1103 1.1 skrll library, but must be handled only at dynamic-link
1104 1.1 skrll time. FIXME: Not sure this example covers the
1105 1.1 skrll h->elf_link_hash_flags test, though it's there in
1106 1.1 skrll other targets. */
1107 1.1 skrll if (bfd_link_pic (info)
1108 1.1 skrll && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1109 1.1 skrll || !h->def_regular)
1110 1.1 skrll && (input_section->flags & SEC_ALLOC) != 0
1111 1.1 skrll && (r_type == R_CRIS_8
1112 1.1.1.4 christos || r_type == R_CRIS_16
1113 1.1.1.3 christos || r_type == R_CRIS_32
1114 1.1.1.3 christos || r_type == R_CRIS_8_PCREL
1115 1.1.1.3 christos || r_type == R_CRIS_16_PCREL
1116 1.1.1.3 christos || r_type == R_CRIS_32_PCREL))
1117 1.1 skrll relocation = 0;
1118 1.1 skrll else if (!bfd_link_relocatable (info) && unresolved_reloc
1119 1.1.1.6 christos && (_bfd_elf_section_offset (output_bfd, info,
1120 1.1.1.7 christos input_section,
1121 1.1 skrll rel->r_offset)
1122 1.1 skrll != (bfd_vma) -1))
1123 1.1 skrll {
1124 1.1 skrll _bfd_error_handler
1125 1.1 skrll /* xgettext:c-format */
1126 1.1.1.9 christos (_("%pB, section %pA: unresolvable relocation %s against symbol `%s'"),
1127 1.1 skrll input_bfd,
1128 1.1 skrll input_section,
1129 1.1 skrll cris_elf_howto_table[r_type].name,
1130 1.1 skrll symname);
1131 1.1.1.3 christos bfd_set_error (bfd_error_bad_value);
1132 1.1.1.2 christos return false;
1133 1.1.1.3 christos }
1134 1.1 skrll }
1135 1.1.1.4 christos }
1136 1.1 skrll
1137 1.1 skrll if (sec != NULL && discarded_section (sec))
1138 1.1.1.6 christos RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1139 1.1.1.6 christos rel, 1, relend, howto, 0, contents);
1140 1.1.1.6 christos
1141 1.1 skrll if (bfd_link_relocatable (info))
1142 1.1 skrll continue;
1143 1.1 skrll
1144 1.1 skrll resolved_to_zero = (h != NULL
1145 1.1 skrll && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
1146 1.1 skrll
1147 1.1 skrll switch (r_type)
1148 1.1 skrll {
1149 1.1 skrll case R_CRIS_16_GOTPLT:
1150 1.1 skrll case R_CRIS_32_GOTPLT:
1151 1.1 skrll /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1152 1.1 skrll but we require a PLT, and the PLT handling will take care of
1153 1.1.1.6 christos filling in the PLT-specific GOT entry. For the GOT offset,
1154 1.1 skrll calculate it as we do when filling it in for the .got.plt
1155 1.1 skrll section. If we don't have a PLT, punt to GOT handling. */
1156 1.1 skrll if (h != NULL
1157 1.1 skrll && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1158 1.1 skrll {
1159 1.1 skrll asection *sgotplt = htab->root.sgotplt;
1160 1.1 skrll bfd_vma got_offset;
1161 1.1 skrll
1162 1.1 skrll BFD_ASSERT (h->dynindx != -1);
1163 1.1 skrll BFD_ASSERT (sgotplt != NULL);
1164 1.1 skrll
1165 1.1 skrll got_offset
1166 1.1 skrll = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1167 1.1 skrll
1168 1.1 skrll relocation = got_offset;
1169 1.1 skrll break;
1170 1.1 skrll }
1171 1.1 skrll
1172 1.1 skrll /* We didn't make a PLT entry for this symbol. Maybe everything is
1173 1.1 skrll folded into the GOT. Other than folding, this happens when
1174 1.1 skrll statically linking PIC code, or when using -Bsymbolic. Check
1175 1.1 skrll that we instead have a GOT entry as done for us by
1176 1.1 skrll elf_cris_adjust_dynamic_symbol, and drop through into the
1177 1.1.1.4 christos ordinary GOT cases. This must not happen for the
1178 1.1 skrll executable, because any reference it does to a function
1179 1.1 skrll that is satisfied by a DSO must generate a PLT. We assume
1180 1.1 skrll these call-specific relocs don't address non-functions. */
1181 1.1 skrll if (h != NULL
1182 1.1.1.6 christos && (h->got.offset == (bfd_vma) -1
1183 1.1 skrll || (!bfd_link_pic (info)
1184 1.1.1.6 christos && !(h->def_regular
1185 1.1.1.7 christos || (!h->def_dynamic
1186 1.1 skrll && h->root.type == bfd_link_hash_undefweak)))))
1187 1.1.1.6 christos {
1188 1.1.1.7 christos _bfd_error_handler
1189 1.1 skrll ((h->got.offset == (bfd_vma) -1)
1190 1.1 skrll /* xgettext:c-format */
1191 1.1 skrll ? _("%pB, section %pA: no PLT nor GOT for relocation %s"
1192 1.1 skrll " against symbol `%s'")
1193 1.1 skrll /* xgettext:c-format */
1194 1.1 skrll : _("%pB, section %pA: no PLT for relocation %s"
1195 1.1 skrll " against symbol `%s'"),
1196 1.1 skrll input_bfd,
1197 1.1 skrll input_section,
1198 1.1 skrll cris_elf_howto_table[r_type].name,
1199 1.1 skrll (symname != NULL && symname[0] != '\0'
1200 1.1.1.9 christos ? symname : _("[whose name is lost]")));
1201 1.1 skrll
1202 1.1 skrll /* FIXME: Perhaps blaming input is not the right thing to
1203 1.1 skrll do; this is probably an internal error. But it is true
1204 1.1 skrll that we didn't like that particular input. */
1205 1.1 skrll bfd_set_error (bfd_error_bad_value);
1206 1.1 skrll return false;
1207 1.1 skrll }
1208 1.1 skrll /* Fall through. */
1209 1.1 skrll
1210 1.1 skrll /* The size of the actual relocation is not used here; we only
1211 1.1 skrll fill in the GOT table here. */
1212 1.1 skrll case R_CRIS_16_GOT:
1213 1.1 skrll case R_CRIS_32_GOT:
1214 1.1 skrll {
1215 1.1 skrll bfd_vma off;
1216 1.1 skrll
1217 1.1 skrll /* Note that despite using RELA relocations, the .got contents
1218 1.1 skrll is always filled in with the link-relative relocation
1219 1.1 skrll value; the addend. */
1220 1.1 skrll
1221 1.1.1.4 christos if (h != NULL)
1222 1.1 skrll {
1223 1.1 skrll off = h->got.offset;
1224 1.1 skrll BFD_ASSERT (off != (bfd_vma) -1);
1225 1.1.1.4 christos
1226 1.1.1.4 christos if (!elf_hash_table (info)->dynamic_sections_created
1227 1.1 skrll || (! bfd_link_pic (info)
1228 1.1 skrll && (h->def_regular
1229 1.1.1.4 christos || h->type == STT_FUNC
1230 1.1 skrll || h->needs_plt))
1231 1.1 skrll || (bfd_link_pic (info)
1232 1.1 skrll && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
1233 1.1 skrll && h->def_regular))
1234 1.1.1.4 christos {
1235 1.1 skrll /* This wasn't checked above for ! bfd_link_pic (info), but
1236 1.1 skrll must hold there if we get here; the symbol must
1237 1.1 skrll be defined in the regular program or be undefweak
1238 1.1 skrll or be a function or otherwise need a PLT. */
1239 1.1 skrll BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1240 1.1 skrll || bfd_link_pic (info)
1241 1.1 skrll || h->def_regular
1242 1.1 skrll || h->type == STT_FUNC
1243 1.1 skrll || h->needs_plt
1244 1.1 skrll || h->root.type == bfd_link_hash_undefweak);
1245 1.1 skrll
1246 1.1 skrll /* This is actually a static link, or it is a
1247 1.1 skrll -Bsymbolic link and the symbol is defined locally,
1248 1.1 skrll or is undefweak, or the symbol was forced to be
1249 1.1 skrll local because of a version file, or we're not
1250 1.1 skrll creating a dynamic object. We must initialize this
1251 1.1 skrll entry in the global offset table. Since the offset
1252 1.1 skrll must always be a multiple of 4, we use the least
1253 1.1 skrll significant bit to record whether we have
1254 1.1 skrll initialized it already.
1255 1.1 skrll
1256 1.1 skrll If this GOT entry should be runtime-initialized, we
1257 1.1 skrll will create a .rela.got relocation entry to
1258 1.1 skrll initialize the value. This is done in the
1259 1.1 skrll finish_dynamic_symbol routine. */
1260 1.1 skrll if ((off & 1) != 0)
1261 1.1 skrll off &= ~1;
1262 1.1 skrll else
1263 1.1 skrll {
1264 1.1 skrll bfd_put_32 (output_bfd, relocation,
1265 1.1 skrll sgot->contents + off);
1266 1.1 skrll h->got.offset |= 1;
1267 1.1 skrll }
1268 1.1 skrll }
1269 1.1 skrll }
1270 1.1 skrll else
1271 1.1 skrll {
1272 1.1 skrll BFD_ASSERT (local_got_offsets != NULL
1273 1.1 skrll && local_got_offsets[r_symndx] != (bfd_vma) -1);
1274 1.1 skrll
1275 1.1 skrll off = local_got_offsets[r_symndx];
1276 1.1 skrll
1277 1.1 skrll /* The offset must always be a multiple of 4. We use
1278 1.1 skrll the least significant bit to record whether we have
1279 1.1 skrll already generated the necessary reloc. */
1280 1.1.1.4 christos if ((off & 1) != 0)
1281 1.1 skrll off &= ~1;
1282 1.1 skrll else
1283 1.1 skrll {
1284 1.1 skrll bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1285 1.1.1.6 christos
1286 1.1.1.2 christos if (bfd_link_pic (info))
1287 1.1 skrll {
1288 1.1 skrll Elf_Internal_Rela outrel;
1289 1.1 skrll bfd_byte *loc;
1290 1.1 skrll
1291 1.1 skrll srelgot = htab->root.srelgot;
1292 1.1 skrll BFD_ASSERT (srelgot != NULL);
1293 1.1.1.2 christos
1294 1.1.1.2 christos outrel.r_offset = (sgot->output_section->vma
1295 1.1 skrll + sgot->output_offset
1296 1.1 skrll + off);
1297 1.1 skrll outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1298 1.1 skrll outrel.r_addend = relocation;
1299 1.1 skrll loc = srelgot->contents;
1300 1.1 skrll loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1301 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1302 1.1 skrll }
1303 1.1 skrll
1304 1.1 skrll local_got_offsets[r_symndx] |= 1;
1305 1.1 skrll }
1306 1.1 skrll }
1307 1.1 skrll
1308 1.1 skrll relocation = sgot->output_offset + off;
1309 1.1 skrll if (rel->r_addend != 0)
1310 1.1.1.6 christos {
1311 1.1.1.6 christos /* We can't do anything for a relocation which is against
1312 1.1.1.7 christos a symbol *plus offset*. GOT holds relocations for
1313 1.1.1.7 christos symbols. Make this an error; the compiler isn't
1314 1.1 skrll allowed to pass us these kinds of things. */
1315 1.1 skrll if (h == NULL)
1316 1.1 skrll _bfd_error_handler
1317 1.1.1.7 christos /* xgettext:c-format */
1318 1.1 skrll (_("%pB, section %pA: relocation %s with non-zero addend"
1319 1.1.1.6 christos " %" PRId64 " against local symbol"),
1320 1.1.1.6 christos input_bfd,
1321 1.1.1.7 christos input_section,
1322 1.1.1.7 christos cris_elf_howto_table[r_type].name,
1323 1.1 skrll (int64_t) rel->r_addend);
1324 1.1 skrll else
1325 1.1 skrll _bfd_error_handler
1326 1.1.1.7 christos /* xgettext:c-format */
1327 1.1 skrll (_("%pB, section %pA: relocation %s with non-zero addend"
1328 1.1 skrll " %" PRId64 " against symbol `%s'"),
1329 1.1 skrll input_bfd,
1330 1.1.1.9 christos input_section,
1331 1.1 skrll cris_elf_howto_table[r_type].name,
1332 1.1 skrll (int64_t) rel->r_addend,
1333 1.1 skrll symname[0] != '\0' ? symname : _("[whose name is lost]"));
1334 1.1 skrll
1335 1.1 skrll bfd_set_error (bfd_error_bad_value);
1336 1.1 skrll return false;
1337 1.1 skrll }
1338 1.1 skrll }
1339 1.1 skrll break;
1340 1.1 skrll
1341 1.1.1.4 christos case R_CRIS_32_GOTREL:
1342 1.1 skrll /* This relocation must only be performed against local symbols.
1343 1.1 skrll It's also ok when we link a program and the symbol is either
1344 1.1 skrll defined in an ordinary (non-DSO) object or is undefined weak. */
1345 1.1 skrll if (h != NULL
1346 1.1.1.6 christos && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1347 1.1.1.6 christos && !(!bfd_link_pic (info)
1348 1.1.1.7 christos && (h->def_regular
1349 1.1 skrll || (!h->def_dynamic
1350 1.1 skrll && h->root.type == bfd_link_hash_undefweak))))
1351 1.1 skrll {
1352 1.1 skrll _bfd_error_handler
1353 1.1 skrll /* xgettext:c-format */
1354 1.1 skrll (_("%pB, section %pA: relocation %s is"
1355 1.1.1.9 christos " not allowed for global symbol: `%s'"),
1356 1.1 skrll input_bfd,
1357 1.1 skrll input_section,
1358 1.1 skrll cris_elf_howto_table[r_type].name,
1359 1.1 skrll symname);
1360 1.1 skrll bfd_set_error (bfd_error_bad_value);
1361 1.1 skrll return false;
1362 1.1 skrll }
1363 1.1.1.6 christos
1364 1.1.1.6 christos /* This can happen if we get a link error with the input ELF
1365 1.1.1.7 christos variant mismatching the output variant. Emit an error so
1366 1.1 skrll it's noticed if it happens elsewhere. */
1367 1.1 skrll if (sgot == NULL)
1368 1.1 skrll {
1369 1.1 skrll _bfd_error_handler
1370 1.1.1.9 christos /* xgettext:c-format */
1371 1.1 skrll (_("%pB, section %pA: relocation %s with no GOT created"),
1372 1.1 skrll input_bfd,
1373 1.1 skrll input_section,
1374 1.1 skrll cris_elf_howto_table[r_type].name);
1375 1.1 skrll bfd_set_error (bfd_error_bad_value);
1376 1.1 skrll return false;
1377 1.1 skrll }
1378 1.1 skrll
1379 1.1 skrll /* This relocation is like a PC-relative one, except the
1380 1.1 skrll reference point is the location of GOT. Note that
1381 1.1 skrll sgot->output_offset is not involved in this calculation. We
1382 1.1 skrll always want the start of entire .got section, not the
1383 1.1 skrll position after the reserved header. */
1384 1.1 skrll relocation -= sgot->output_section->vma;
1385 1.1 skrll break;
1386 1.1 skrll
1387 1.1 skrll case R_CRIS_32_PLT_PCREL:
1388 1.1 skrll /* Relocation is to the entry for this symbol in the
1389 1.1 skrll procedure linkage table. */
1390 1.1 skrll
1391 1.1 skrll /* Resolve a PLT_PCREL reloc against a local symbol directly,
1392 1.1 skrll without using the procedure linkage table. */
1393 1.1 skrll if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1394 1.1 skrll break;
1395 1.1 skrll
1396 1.1 skrll if (h->plt.offset == (bfd_vma) -1
1397 1.1 skrll || splt == NULL)
1398 1.1 skrll {
1399 1.1 skrll /* We didn't make a PLT entry for this symbol. This
1400 1.1 skrll happens when statically linking PIC code, or when
1401 1.1 skrll using -Bsymbolic. */
1402 1.1 skrll break;
1403 1.1 skrll }
1404 1.1 skrll
1405 1.1 skrll relocation = (splt->output_section->vma
1406 1.1 skrll + splt->output_offset
1407 1.1 skrll + h->plt.offset);
1408 1.1 skrll break;
1409 1.1 skrll
1410 1.1 skrll case R_CRIS_32_PLT_GOTREL:
1411 1.1 skrll /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1412 1.1 skrll start of the .got section. See also comment at
1413 1.1 skrll R_CRIS_32_GOT. */
1414 1.1 skrll relocation -= sgot->output_section->vma;
1415 1.1 skrll
1416 1.1 skrll /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1417 1.1 skrll without using the procedure linkage table. */
1418 1.1 skrll if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1419 1.1 skrll break;
1420 1.1 skrll
1421 1.1 skrll if (h->plt.offset == (bfd_vma) -1
1422 1.1 skrll || splt == NULL)
1423 1.1 skrll {
1424 1.1 skrll /* We didn't make a PLT entry for this symbol. This
1425 1.1 skrll happens when statically linking PIC code, or when
1426 1.1 skrll using -Bsymbolic. */
1427 1.1 skrll break;
1428 1.1 skrll }
1429 1.1 skrll
1430 1.1 skrll relocation = (splt->output_section->vma
1431 1.1 skrll + splt->output_offset
1432 1.1 skrll + h->plt.offset
1433 1.1 skrll - sgot->output_section->vma);
1434 1.1.1.2 christos break;
1435 1.1.1.2 christos
1436 1.1 skrll case R_CRIS_8_PCREL:
1437 1.1 skrll case R_CRIS_16_PCREL:
1438 1.1 skrll case R_CRIS_32_PCREL:
1439 1.1 skrll /* If the symbol was local, we need no shlib-specific handling. */
1440 1.1 skrll if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1441 1.1 skrll || h->dynindx == -1)
1442 1.1.1.4 christos break;
1443 1.1.1.6 christos
1444 1.1.1.2 christos /* Fall through. */
1445 1.1 skrll case R_CRIS_8:
1446 1.1 skrll case R_CRIS_16:
1447 1.1 skrll case R_CRIS_32:
1448 1.1 skrll if (bfd_link_pic (info)
1449 1.1.1.4 christos && !resolved_to_zero
1450 1.1.1.2 christos && r_symndx != STN_UNDEF
1451 1.1 skrll && (input_section->flags & SEC_ALLOC) != 0
1452 1.1 skrll && ((r_type != R_CRIS_8_PCREL
1453 1.1 skrll && r_type != R_CRIS_16_PCREL
1454 1.1.1.9 christos && r_type != R_CRIS_32_PCREL)
1455 1.1 skrll || (!SYMBOLIC_BIND (info, h)
1456 1.1 skrll || (h != NULL && !h->def_regular))))
1457 1.1 skrll {
1458 1.1 skrll Elf_Internal_Rela outrel;
1459 1.1 skrll bfd_byte *loc;
1460 1.1 skrll bool skip, relocate;
1461 1.1 skrll
1462 1.1.1.2 christos /* When generating a shared object, these relocations
1463 1.1.1.9 christos are copied into the output file to be resolved at run
1464 1.1.1.2 christos time. */
1465 1.1.1.2 christos
1466 1.1 skrll if (sreloc == NULL)
1467 1.1 skrll {
1468 1.1 skrll sreloc = _bfd_elf_get_dynamic_reloc_section
1469 1.1 skrll (dynobj, input_section, /*rela?*/ true);
1470 1.1.1.9 christos /* The section should have been created in cris_elf_check_relocs,
1471 1.1 skrll but that function will not be called for objects which fail in
1472 1.1 skrll cris_elf_merge_private_bfd_data. */
1473 1.1 skrll if (sreloc == NULL)
1474 1.1.1.9 christos {
1475 1.1.1.9 christos bfd_set_error (bfd_error_bad_value);
1476 1.1 skrll return false;
1477 1.1 skrll }
1478 1.1 skrll }
1479 1.1 skrll
1480 1.1 skrll skip = false;
1481 1.1.1.9 christos relocate = false;
1482 1.1.1.2 christos
1483 1.1.1.2 christos outrel.r_offset =
1484 1.1.1.2 christos _bfd_elf_section_offset (output_bfd, info, input_section,
1485 1.1.1.2 christos rel->r_offset);
1486 1.1.1.2 christos if (outrel.r_offset == (bfd_vma) -1)
1487 1.1.1.2 christos skip = true;
1488 1.1.1.2 christos else if (outrel.r_offset == (bfd_vma) -2
1489 1.1.1.2 christos /* For now, undefined weak symbols with non-default
1490 1.1.1.2 christos visibility (yielding 0), like exception info for
1491 1.1.1.2 christos discarded sections, will get a R_CRIS_NONE
1492 1.1.1.9 christos relocation rather than no relocation, because we
1493 1.1 skrll notice too late that the symbol doesn't need a
1494 1.1 skrll relocation. */
1495 1.1 skrll || (h != NULL
1496 1.1 skrll && h->root.type == bfd_link_hash_undefweak
1497 1.1 skrll && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1498 1.1 skrll skip = true, relocate = true;
1499 1.1 skrll outrel.r_offset += (input_section->output_section->vma
1500 1.1 skrll + input_section->output_offset);
1501 1.1.1.4 christos
1502 1.1 skrll if (skip)
1503 1.1 skrll memset (&outrel, 0, sizeof outrel);
1504 1.1 skrll /* h->dynindx may be -1 if the symbol was marked to
1505 1.1 skrll become local. */
1506 1.1 skrll else if (h != NULL
1507 1.1 skrll && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1508 1.1 skrll || !h->def_regular))
1509 1.1 skrll {
1510 1.1 skrll BFD_ASSERT (h->dynindx != -1);
1511 1.1 skrll outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1512 1.1 skrll outrel.r_addend = relocation + rel->r_addend;
1513 1.1 skrll }
1514 1.1.1.9 christos else
1515 1.1 skrll {
1516 1.1 skrll outrel.r_addend = relocation + rel->r_addend;
1517 1.1 skrll
1518 1.1 skrll if (r_type == R_CRIS_32)
1519 1.1 skrll {
1520 1.1 skrll relocate = true;
1521 1.1 skrll outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1522 1.1 skrll }
1523 1.1 skrll else
1524 1.1 skrll {
1525 1.1 skrll long indx;
1526 1.1.1.9 christos
1527 1.1 skrll if (bfd_is_abs_section (sec))
1528 1.1 skrll indx = 0;
1529 1.1 skrll else if (sec == NULL || sec->owner == NULL)
1530 1.1 skrll {
1531 1.1 skrll bfd_set_error (bfd_error_bad_value);
1532 1.1 skrll return false;
1533 1.1 skrll }
1534 1.1 skrll else
1535 1.1 skrll {
1536 1.1 skrll asection *osec;
1537 1.1 skrll
1538 1.1 skrll /* We are turning this relocation into one
1539 1.1 skrll against a section symbol. It would be
1540 1.1 skrll proper to subtract the symbol's value,
1541 1.1 skrll osec->vma, from the emitted reloc addend,
1542 1.1 skrll but ld.so expects buggy relocs. */
1543 1.1 skrll osec = sec->output_section;
1544 1.1 skrll indx = elf_section_data (osec)->dynindx;
1545 1.1 skrll if (indx == 0)
1546 1.1 skrll {
1547 1.1 skrll osec = htab->root.text_index_section;
1548 1.1 skrll indx = elf_section_data (osec)->dynindx;
1549 1.1 skrll }
1550 1.1 skrll BFD_ASSERT (indx != 0);
1551 1.1 skrll }
1552 1.1 skrll
1553 1.1 skrll outrel.r_info = ELF32_R_INFO (indx, r_type);
1554 1.1 skrll }
1555 1.1 skrll }
1556 1.1.1.6 christos
1557 1.1.1.6 christos loc = sreloc->contents;
1558 1.1 skrll loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1559 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1560 1.1 skrll
1561 1.1 skrll /* This reloc will be computed at runtime, so there's no
1562 1.1 skrll need to do anything now, except for R_CRIS_32 relocations
1563 1.1.1.2 christos that have been turned into R_CRIS_RELATIVE. */
1564 1.1.1.2 christos if (!relocate)
1565 1.1.1.2 christos continue;
1566 1.1.1.2 christos }
1567 1.1.1.2 christos
1568 1.1.1.2 christos break;
1569 1.1.1.2 christos
1570 1.1.1.2 christos case R_CRIS_16_DTPREL:
1571 1.1.1.2 christos case R_CRIS_32_DTPREL:
1572 1.1.1.2 christos /* This relocation must only be performed against local
1573 1.1.1.2 christos symbols, or to sections that are not loadable. It's also
1574 1.1.1.4 christos ok when we link a program and the symbol is defined in an
1575 1.1.1.2 christos ordinary (non-DSO) object (if it's undefined there, we've
1576 1.1.1.2 christos already seen an error). */
1577 1.1.1.2 christos if (h != NULL
1578 1.1.1.6 christos && (input_section->flags & SEC_ALLOC) != 0
1579 1.1.1.2 christos && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1580 1.1.1.2 christos && (bfd_link_pic (info)
1581 1.1.1.6 christos || (!h->def_regular
1582 1.1.1.7 christos && h->root.type != bfd_link_hash_undefined)))
1583 1.1.1.2 christos {
1584 1.1.1.6 christos _bfd_error_handler
1585 1.1.1.7 christos ((h->root.type == bfd_link_hash_undefined)
1586 1.1.1.2 christos /* We shouldn't get here for GCC-emitted code. */
1587 1.1.1.2 christos /* xgettext:c-format */
1588 1.1.1.2 christos ? _("%pB, section %pA: relocation %s has an undefined"
1589 1.1.1.2 christos " reference to `%s', perhaps a declaration mixup?")
1590 1.1.1.2 christos /* xgettext:c-format */
1591 1.1.1.2 christos : _("%pB, section %pA: relocation %s is"
1592 1.1.1.2 christos " not allowed for `%s', a global symbol with default"
1593 1.1.1.2 christos " visibility, perhaps a declaration mixup?"),
1594 1.1.1.9 christos input_bfd,
1595 1.1.1.2 christos input_section,
1596 1.1.1.2 christos cris_elf_howto_table[r_type].name,
1597 1.1.1.2 christos symname != NULL && symname[0] != '\0'
1598 1.1.1.2 christos ? symname : _("[whose name is lost]"));
1599 1.1.1.2 christos bfd_set_error (bfd_error_bad_value);
1600 1.1.1.2 christos return false;
1601 1.1.1.2 christos }
1602 1.1.1.2 christos
1603 1.1.1.2 christos BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1604 1.1.1.2 christos || htab->dtpmod_refcount != 0);
1605 1.1.1.2 christos
1606 1.1.1.2 christos /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1607 1.1.1.2 christos already done so. Note that we do this in .got.plt, not
1608 1.1.1.6 christos in .got, as .got.plt contains the first part, still the
1609 1.1.1.2 christos reloc is against .got, because the linker script directs
1610 1.1.1.2 christos (is required to direct) them both into .got. */
1611 1.1.1.4 christos if (htab->dtpmod_refcount > 0
1612 1.1.1.2 christos && (input_section->flags & SEC_ALLOC) != 0)
1613 1.1.1.2 christos {
1614 1.1.1.2 christos asection *sgotplt = htab->root.sgotplt;
1615 1.1.1.2 christos BFD_ASSERT (sgotplt != NULL);
1616 1.1.1.6 christos
1617 1.1.1.2 christos if (bfd_link_pic (info))
1618 1.1.1.2 christos {
1619 1.1.1.2 christos Elf_Internal_Rela outrel;
1620 1.1.1.2 christos bfd_byte *loc;
1621 1.1.1.2 christos
1622 1.1.1.2 christos srelgot = htab->root.srelgot;
1623 1.1.1.2 christos BFD_ASSERT (srelgot != NULL);
1624 1.1.1.2 christos loc = srelgot->contents;
1625 1.1.1.2 christos loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1626 1.1.1.2 christos
1627 1.1.1.2 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1628 1.1.1.2 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1629 1.1.1.2 christos outrel.r_offset = (sgotplt->output_section->vma
1630 1.1.1.2 christos + sgotplt->output_offset
1631 1.1.1.2 christos + 12);
1632 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1633 1.1.1.2 christos outrel.r_addend = 0;
1634 1.1.1.2 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1635 1.1.1.2 christos }
1636 1.1.1.2 christos else
1637 1.1.1.2 christos {
1638 1.1.1.2 christos /* For an executable, the GOT entry contents is known. */
1639 1.1.1.2 christos bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1640 1.1.1.2 christos bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1641 1.1.1.2 christos }
1642 1.1.1.2 christos
1643 1.1.1.2 christos /* Reverse the sign to mark that we've emitted the
1644 1.1.1.2 christos required GOT entry. */
1645 1.1.1.2 christos htab->dtpmod_refcount = - htab->dtpmod_refcount;
1646 1.1.1.2 christos }
1647 1.1.1.2 christos
1648 1.1.1.2 christos /* The relocation is the offset from the start of the module
1649 1.1.1.4 christos TLS block to the (local) symbol. */
1650 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec == NULL
1651 1.1.1.2 christos ? 0 : elf_hash_table (info)->tls_sec->vma;
1652 1.1.1.2 christos break;
1653 1.1.1.2 christos
1654 1.1.1.2 christos case R_CRIS_32_GD:
1655 1.1.1.9 christos if (bfd_link_pic (info))
1656 1.1.1.2 christos {
1657 1.1.1.2 christos bfd_set_error (bfd_error_invalid_operation);
1658 1.1.1.2 christos
1659 1.1.1.2 christos /* We've already informed in cris_elf_check_relocs that
1660 1.1.1.2 christos this is an error. */
1661 1.1.1.2 christos return false;
1662 1.1.1.2 christos }
1663 1.1.1.2 christos /* Fall through. */
1664 1.1.1.2 christos
1665 1.1.1.2 christos case R_CRIS_16_GOT_GD:
1666 1.1.1.2 christos case R_CRIS_32_GOT_GD:
1667 1.1.1.6 christos if (rel->r_addend != 0)
1668 1.1.1.6 christos {
1669 1.1.1.7 christos /* We can't do anything for a relocation which is against a
1670 1.1.1.7 christos symbol *plus offset*. The GOT holds relocations for
1671 1.1.1.2 christos symbols. Make this an error; the compiler isn't allowed
1672 1.1.1.2 christos to pass us these kinds of things. */
1673 1.1.1.2 christos _bfd_error_handler
1674 1.1.1.7 christos /* xgettext:c-format */
1675 1.1.1.2 christos (_("%pB, section %pA: relocation %s with non-zero addend"
1676 1.1.1.2 christos " %" PRId64 " against symbol `%s'"),
1677 1.1.1.2 christos input_bfd,
1678 1.1.1.9 christos input_section,
1679 1.1.1.2 christos cris_elf_howto_table[r_type].name,
1680 1.1.1.2 christos (int64_t) rel->r_addend,
1681 1.1.1.4 christos symname[0] != '\0' ? symname : _("[whose name is lost]"));
1682 1.1.1.2 christos
1683 1.1.1.2 christos bfd_set_error (bfd_error_bad_value);
1684 1.1.1.2 christos return false;
1685 1.1.1.2 christos }
1686 1.1.1.2 christos
1687 1.1.1.2 christos if (!bfd_link_pic (info)
1688 1.1.1.2 christos && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1689 1.1.1.2 christos {
1690 1.1.1.2 christos /* Known contents of the GOT. */
1691 1.1.1.2 christos bfd_vma off;
1692 1.1.1.2 christos
1693 1.1.1.2 christos /* The symbol is defined in the program, so just write
1694 1.1.1.2 christos (1, known_tpoffset) into the GOT. */
1695 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec->vma;
1696 1.1.1.2 christos
1697 1.1.1.2 christos if (h != NULL)
1698 1.1.1.2 christos {
1699 1.1.1.2 christos off = elf_cris_hash_entry (h)->tprel_refcount > 0
1700 1.1.1.2 christos ? h->got.offset + 4 : h->got.offset;
1701 1.1.1.2 christos }
1702 1.1.1.2 christos else
1703 1.1.1.2 christos {
1704 1.1.1.2 christos off = local_got_offsets[r_symndx];
1705 1.1.1.2 christos if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1706 1.1.1.2 christos off += 4;
1707 1.1.1.2 christos }
1708 1.1.1.2 christos
1709 1.1.1.2 christos /* We use bit 1 of the offset as a flag for GOT entry with
1710 1.1.1.2 christos the R_CRIS_DTP reloc, setting it when we've emitted the
1711 1.1.1.2 christos GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1712 1.1.1.2 christos relocs. */
1713 1.1.1.2 christos if ((off & 2) == 0)
1714 1.1.1.2 christos {
1715 1.1.1.2 christos off &= ~3;
1716 1.1.1.2 christos
1717 1.1.1.2 christos if (h != NULL)
1718 1.1.1.2 christos h->got.offset |= 2;
1719 1.1.1.2 christos else
1720 1.1.1.2 christos local_got_offsets[r_symndx] |= 2;
1721 1.1.1.2 christos
1722 1.1.1.2 christos bfd_put_32 (output_bfd, 1, sgot->contents + off);
1723 1.1.1.2 christos bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1724 1.1.1.2 christos }
1725 1.1.1.2 christos else
1726 1.1.1.2 christos off &= ~3;
1727 1.1.1.2 christos
1728 1.1.1.2 christos relocation = sgot->output_offset + off
1729 1.1.1.2 christos + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1730 1.1.1.2 christos }
1731 1.1.1.2 christos else
1732 1.1.1.2 christos {
1733 1.1.1.2 christos /* Not all parts of the GOT entry are known; emit a real
1734 1.1.1.2 christos relocation. */
1735 1.1.1.2 christos bfd_vma off;
1736 1.1.1.2 christos
1737 1.1.1.2 christos if (h != NULL)
1738 1.1.1.2 christos off = elf_cris_hash_entry (h)->tprel_refcount > 0
1739 1.1.1.2 christos ? h->got.offset + 4 : h->got.offset;
1740 1.1.1.2 christos else
1741 1.1.1.2 christos {
1742 1.1.1.2 christos off = local_got_offsets[r_symndx];
1743 1.1.1.2 christos if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1744 1.1.1.2 christos off += 4;
1745 1.1.1.2 christos }
1746 1.1.1.2 christos
1747 1.1.1.2 christos /* See above re bit 1 and bit 0 usage. */
1748 1.1.1.2 christos if ((off & 2) == 0)
1749 1.1.1.2 christos {
1750 1.1.1.2 christos Elf_Internal_Rela outrel;
1751 1.1.1.2 christos bfd_byte *loc;
1752 1.1.1.2 christos
1753 1.1.1.2 christos off &= ~3;
1754 1.1.1.2 christos
1755 1.1.1.2 christos if (h != NULL)
1756 1.1.1.2 christos h->got.offset |= 2;
1757 1.1.1.2 christos else
1758 1.1.1.2 christos local_got_offsets[r_symndx] |= 2;
1759 1.1.1.2 christos
1760 1.1.1.6 christos /* Clear the target contents of the GOT (just as a
1761 1.1.1.2 christos gesture; it's already cleared on allocation): this
1762 1.1.1.2 christos relocation is not like the other dynrelocs. */
1763 1.1.1.2 christos bfd_put_32 (output_bfd, 0, sgot->contents + off);
1764 1.1.1.2 christos bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1765 1.1.1.2 christos
1766 1.1.1.2 christos srelgot = htab->root.srelgot;
1767 1.1.1.2 christos BFD_ASSERT (srelgot != NULL);
1768 1.1.1.2 christos
1769 1.1.1.2 christos if (h != NULL && h->dynindx != -1)
1770 1.1.1.2 christos {
1771 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1772 1.1.1.2 christos relocation = 0;
1773 1.1.1.2 christos }
1774 1.1.1.2 christos else
1775 1.1.1.2 christos {
1776 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1777 1.1.1.2 christos
1778 1.1.1.2 christos /* NULL if we had an error. */
1779 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec == NULL
1780 1.1.1.2 christos ? 0 : elf_hash_table (info)->tls_sec->vma;
1781 1.1.1.2 christos }
1782 1.1.1.2 christos
1783 1.1.1.2 christos outrel.r_offset = (sgot->output_section->vma
1784 1.1.1.2 christos + sgot->output_offset
1785 1.1.1.2 christos + off);
1786 1.1.1.2 christos outrel.r_addend = relocation;
1787 1.1.1.2 christos loc = srelgot->contents;
1788 1.1.1.2 christos loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1789 1.1.1.2 christos
1790 1.1.1.2 christos /* NULL if we had an error. */
1791 1.1.1.2 christos if (srelgot->contents != NULL)
1792 1.1.1.2 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1793 1.1.1.2 christos }
1794 1.1.1.2 christos else
1795 1.1.1.2 christos off &= ~3;
1796 1.1.1.2 christos
1797 1.1.1.2 christos relocation = sgot->output_offset + off
1798 1.1.1.2 christos + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1799 1.1.1.2 christos }
1800 1.1.1.2 christos
1801 1.1.1.4 christos /* The GOT-relative offset to the GOT entry is the
1802 1.1.1.2 christos relocation, or for R_CRIS_32_GD, the actual address of
1803 1.1.1.2 christos the GOT entry. */
1804 1.1.1.2 christos break;
1805 1.1.1.2 christos
1806 1.1.1.2 christos case R_CRIS_32_IE:
1807 1.1.1.9 christos if (bfd_link_pic (info))
1808 1.1.1.2 christos {
1809 1.1.1.2 christos bfd_set_error (bfd_error_invalid_operation);
1810 1.1.1.2 christos
1811 1.1.1.2 christos /* We've already informed in cris_elf_check_relocs that
1812 1.1.1.2 christos this is an error. */
1813 1.1.1.2 christos return false;
1814 1.1.1.2 christos }
1815 1.1.1.2 christos /* Fall through. */
1816 1.1.1.2 christos
1817 1.1.1.2 christos case R_CRIS_32_GOT_TPREL:
1818 1.1.1.2 christos case R_CRIS_16_GOT_TPREL:
1819 1.1.1.2 christos if (rel->r_addend != 0)
1820 1.1.1.6 christos {
1821 1.1.1.6 christos /* We can't do anything for a relocation which is
1822 1.1.1.7 christos against a symbol *plus offset*. GOT holds
1823 1.1.1.7 christos relocations for symbols. Make this an error; the
1824 1.1.1.2 christos compiler isn't allowed to pass us these kinds of
1825 1.1.1.2 christos things. */
1826 1.1.1.2 christos _bfd_error_handler
1827 1.1.1.7 christos /* xgettext:c-format */
1828 1.1.1.2 christos (_("%pB, section %pA: relocation %s with non-zero addend"
1829 1.1.1.2 christos " %" PRId64 " against symbol `%s'"),
1830 1.1.1.9 christos input_bfd,
1831 1.1.1.2 christos input_section,
1832 1.1.1.2 christos cris_elf_howto_table[r_type].name,
1833 1.1.1.4 christos (int64_t) rel->r_addend,
1834 1.1.1.3 christos symname[0] != '\0' ? symname : _("[whose name is lost]"));
1835 1.1.1.2 christos bfd_set_error (bfd_error_bad_value);
1836 1.1.1.2 christos return false;
1837 1.1.1.2 christos }
1838 1.1.1.2 christos
1839 1.1.1.2 christos if (!bfd_link_pic (info)
1840 1.1.1.2 christos && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1841 1.1.1.2 christos {
1842 1.1.1.2 christos /* Known contents of the GOT. */
1843 1.1.1.2 christos bfd_vma off;
1844 1.1.1.2 christos
1845 1.1.1.2 christos /* The symbol is defined in the program, so just write
1846 1.1.1.2 christos the -prog_tls_size+known_tpoffset into the GOT. */
1847 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec->vma;
1848 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_size;
1849 1.1.1.2 christos
1850 1.1.1.2 christos if (h != NULL)
1851 1.1.1.2 christos off = h->got.offset;
1852 1.1.1.2 christos else
1853 1.1.1.2 christos off = local_got_offsets[r_symndx];
1854 1.1.1.2 christos
1855 1.1.1.2 christos /* Bit 0 is used to mark whether we've emitted the required
1856 1.1.1.2 christos entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1857 1.1.1.2 christos is used similarly for R_CRIS_DTP, see above. */
1858 1.1.1.2 christos if ((off & 1) == 0)
1859 1.1.1.2 christos {
1860 1.1.1.2 christos off &= ~3;
1861 1.1.1.2 christos
1862 1.1.1.2 christos if (h != NULL)
1863 1.1.1.2 christos h->got.offset |= 1;
1864 1.1.1.2 christos else
1865 1.1.1.2 christos local_got_offsets[r_symndx] |= 1;
1866 1.1.1.2 christos
1867 1.1.1.2 christos bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1868 1.1.1.2 christos }
1869 1.1.1.2 christos else
1870 1.1.1.2 christos off &= ~3;
1871 1.1.1.2 christos
1872 1.1.1.2 christos relocation = sgot->output_offset + off
1873 1.1.1.2 christos + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1874 1.1.1.2 christos }
1875 1.1.1.2 christos else
1876 1.1.1.2 christos {
1877 1.1.1.2 christos /* Emit a real relocation. */
1878 1.1.1.2 christos bfd_vma off;
1879 1.1.1.2 christos
1880 1.1.1.2 christos if (h != NULL)
1881 1.1.1.2 christos off = h->got.offset;
1882 1.1.1.2 christos else
1883 1.1.1.2 christos off = local_got_offsets[r_symndx];
1884 1.1.1.2 christos
1885 1.1.1.2 christos /* See above re usage of bit 0 and 1. */
1886 1.1.1.2 christos if ((off & 1) == 0)
1887 1.1.1.2 christos {
1888 1.1.1.2 christos Elf_Internal_Rela outrel;
1889 1.1.1.2 christos bfd_byte *loc;
1890 1.1.1.2 christos
1891 1.1.1.2 christos off &= ~3;
1892 1.1.1.6 christos
1893 1.1.1.2 christos if (h != NULL)
1894 1.1.1.2 christos h->got.offset |= 1;
1895 1.1.1.2 christos else
1896 1.1.1.2 christos local_got_offsets[r_symndx] |= 1;
1897 1.1.1.2 christos
1898 1.1.1.2 christos srelgot = htab->root.srelgot;
1899 1.1.1.2 christos BFD_ASSERT (srelgot != NULL);
1900 1.1.1.2 christos
1901 1.1.1.2 christos if (h != NULL && h->dynindx != -1)
1902 1.1.1.2 christos {
1903 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1904 1.1.1.2 christos relocation = 0;
1905 1.1.1.2 christos }
1906 1.1.1.2 christos else
1907 1.1.1.2 christos {
1908 1.1.1.2 christos outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1909 1.1.1.2 christos
1910 1.1.1.2 christos /* NULL if we had an error. */
1911 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec == NULL
1912 1.1.1.2 christos ? 0 : elf_hash_table (info)->tls_sec->vma;
1913 1.1.1.2 christos }
1914 1.1.1.2 christos
1915 1.1.1.2 christos /* Just "define" the initial contents in some
1916 1.1.1.2 christos semi-logical way. */
1917 1.1.1.2 christos bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1918 1.1.1.2 christos
1919 1.1.1.2 christos outrel.r_offset = (sgot->output_section->vma
1920 1.1.1.2 christos + sgot->output_offset
1921 1.1.1.2 christos + off);
1922 1.1.1.2 christos outrel.r_addend = relocation;
1923 1.1.1.2 christos loc = srelgot->contents;
1924 1.1.1.2 christos loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1925 1.1.1.2 christos /* NULL if we had an error. */
1926 1.1.1.2 christos if (srelgot->contents != NULL)
1927 1.1.1.2 christos bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1928 1.1.1.2 christos }
1929 1.1.1.2 christos else
1930 1.1.1.2 christos off &= ~3;
1931 1.1.1.2 christos
1932 1.1.1.2 christos relocation = sgot->output_offset + off
1933 1.1.1.2 christos + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1934 1.1.1.2 christos }
1935 1.1.1.2 christos
1936 1.1.1.2 christos /* The GOT-relative offset to the GOT entry is the relocation,
1937 1.1.1.2 christos or for R_CRIS_32_GD, the actual address of the GOT entry. */
1938 1.1.1.4 christos break;
1939 1.1.1.2 christos
1940 1.1.1.2 christos case R_CRIS_16_TPREL:
1941 1.1.1.2 christos case R_CRIS_32_TPREL:
1942 1.1.1.2 christos /* This relocation must only be performed against symbols
1943 1.1.1.2 christos defined in an ordinary (non-DSO) object. */
1944 1.1.1.9 christos if (bfd_link_pic (info))
1945 1.1.1.2 christos {
1946 1.1.1.2 christos bfd_set_error (bfd_error_invalid_operation);
1947 1.1.1.2 christos
1948 1.1.1.2 christos /* We've already informed in cris_elf_check_relocs that
1949 1.1.1.2 christos this is an error. */
1950 1.1.1.2 christos return false;
1951 1.1.1.2 christos }
1952 1.1.1.2 christos
1953 1.1.1.2 christos if (h != NULL
1954 1.1.1.6 christos && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1955 1.1.1.6 christos && !(h->def_regular || ELF_COMMON_DEF_P (h))
1956 1.1.1.7 christos /* If it's undefined, then an error message has already
1957 1.1.1.2 christos been emitted. */
1958 1.1.1.2 christos && h->root.type != bfd_link_hash_undefined)
1959 1.1.1.2 christos {
1960 1.1.1.2 christos _bfd_error_handler
1961 1.1.1.2 christos /* xgettext:c-format */
1962 1.1.1.2 christos (_("%pB, section %pA: relocation %s is"
1963 1.1.1.2 christos " not allowed for symbol: `%s'"
1964 1.1.1.2 christos " which is defined outside the program,"
1965 1.1.1.9 christos " perhaps a declaration mixup?"),
1966 1.1.1.2 christos input_bfd,
1967 1.1.1.2 christos input_section,
1968 1.1.1.2 christos cris_elf_howto_table[r_type].name,
1969 1.1.1.2 christos symname);
1970 1.1.1.2 christos bfd_set_error (bfd_error_bad_value);
1971 1.1.1.2 christos return false;
1972 1.1.1.2 christos }
1973 1.1.1.2 christos
1974 1.1.1.2 christos /* NULL if we had an error. */
1975 1.1.1.2 christos relocation -= elf_hash_table (info)->tls_sec == NULL
1976 1.1.1.2 christos ? 0
1977 1.1.1.2 christos : (elf_hash_table (info)->tls_sec->vma
1978 1.1.1.2 christos + elf_hash_table (info)->tls_size);
1979 1.1.1.9 christos
1980 1.1 skrll /* The TLS-relative offset is the relocation. */
1981 1.1 skrll break;
1982 1.1 skrll
1983 1.1 skrll default:
1984 1.1 skrll BFD_FAIL ();
1985 1.1 skrll return false;
1986 1.1 skrll }
1987 1.1 skrll
1988 1.1 skrll r = cris_final_link_relocate (howto, input_bfd, input_section,
1989 1.1 skrll contents, rel, relocation);
1990 1.1 skrll
1991 1.1 skrll if (r != bfd_reloc_ok)
1992 1.1.1.5 christos {
1993 1.1 skrll const char * msg = (const char *) NULL;
1994 1.1 skrll
1995 1.1.1.2 christos switch (r)
1996 1.1.1.2 christos {
1997 1.1.1.2 christos case bfd_reloc_overflow:
1998 1.1.1.2 christos (*info->callbacks->reloc_overflow)
1999 1.1.1.2 christos (info, (h ? &h->root : NULL), symname, howto->name,
2000 1.1.1.2 christos (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2001 1.1.1.2 christos if (additional_relocation_error_msg_count > 0)
2002 1.1.1.2 christos {
2003 1.1.1.2 christos additional_relocation_error_msg_count--;
2004 1.1.1.2 christos switch (r_type)
2005 1.1.1.2 christos {
2006 1.1.1.2 christos case R_CRIS_16_GOTPLT:
2007 1.1.1.2 christos case R_CRIS_16_GOT:
2008 1.1.1.6 christos
2009 1.1.1.2 christos /* Not just TLS is involved here, so we make
2010 1.1.1.2 christos generation and message depend on -fPIC/-fpic
2011 1.1.1.2 christos only. */
2012 1.1.1.2 christos case R_CRIS_16_GOT_TPREL:
2013 1.1.1.2 christos case R_CRIS_16_GOT_GD:
2014 1.1.1.2 christos _bfd_error_handler
2015 1.1.1.6 christos (_("(too many global variables for -fpic:"
2016 1.1.1.2 christos " recompile with -fPIC)"));
2017 1.1.1.2 christos break;
2018 1.1.1.2 christos
2019 1.1.1.2 christos case R_CRIS_16_TPREL:
2020 1.1.1.2 christos case R_CRIS_16_DTPREL:
2021 1.1.1.2 christos _bfd_error_handler
2022 1.1.1.2 christos (_("(thread-local data too big for -fpic or"
2023 1.1.1.2 christos " -msmall-tls: recompile with -fPIC or"
2024 1.1.1.2 christos " -mno-small-tls)"));
2025 1.1.1.2 christos break;
2026 1.1 skrll
2027 1.1 skrll /* No known cause for overflow for other relocs. */
2028 1.1 skrll default:
2029 1.1.1.5 christos break;
2030 1.1.1.9 christos }
2031 1.1 skrll }
2032 1.1 skrll break;
2033 1.1 skrll
2034 1.1 skrll case bfd_reloc_undefined:
2035 1.1 skrll (*info->callbacks->undefined_symbol)
2036 1.1 skrll (info, symname, input_bfd, input_section, rel->r_offset, true);
2037 1.1 skrll break;
2038 1.1 skrll
2039 1.1 skrll case bfd_reloc_outofrange:
2040 1.1 skrll msg = _("internal error: out of range error");
2041 1.1 skrll break;
2042 1.1 skrll
2043 1.1 skrll case bfd_reloc_notsupported:
2044 1.1 skrll msg = _("internal error: unsupported relocation error");
2045 1.1 skrll break;
2046 1.1 skrll
2047 1.1 skrll case bfd_reloc_dangerous:
2048 1.1 skrll msg = _("internal error: dangerous relocation");
2049 1.1 skrll break;
2050 1.1 skrll
2051 1.1.1.5 christos default:
2052 1.1.1.5 christos msg = _("internal error: unknown error");
2053 1.1 skrll break;
2054 1.1 skrll }
2055 1.1 skrll
2056 1.1.1.9 christos if (msg)
2057 1.1 skrll (*info->callbacks->warning) (info, msg, symname, input_bfd,
2058 1.1 skrll input_section, rel->r_offset);
2059 1.1 skrll }
2060 1.1 skrll }
2061 1.1 skrll
2062 1.1.1.9 christos return true;
2063 1.1.1.2 christos }
2064 1.1.1.2 christos
2065 1.1.1.2 christos /* Finish up dynamic symbol handling. We set the contents of various
2067 1.1 skrll dynamic sections here. */
2068 1.1.1.2 christos
2069 1.1 skrll static bool
2070 1.1 skrll elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2071 1.1 skrll struct bfd_link_info *info,
2072 1.1 skrll struct elf_link_hash_entry *h,
2073 1.1 skrll Elf_Internal_Sym *sym)
2074 1.1 skrll {
2075 1.1 skrll struct elf_cris_link_hash_table * htab;
2076 1.1 skrll
2077 1.1 skrll /* Where in the plt entry to put values. */
2078 1.1 skrll int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2079 1.1 skrll
2080 1.1 skrll /* What offset to add to the distance to the first PLT entry for the
2081 1.1 skrll value at plt_off3. */
2082 1.1 skrll int plt_off3_value_bias = 4;
2083 1.1 skrll
2084 1.1.1.2 christos /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2085 1.1.1.2 christos for PIC and non-PIC for v32 and pre-v32). */
2086 1.1.1.9 christos int plt_stub_offset = 8;
2087 1.1.1.2 christos int plt_entry_size = PLT_ENTRY_SIZE;
2088 1.1 skrll const bfd_byte *plt_entry = elf_cris_plt_entry;
2089 1.1 skrll const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2090 1.1 skrll
2091 1.1 skrll htab = elf_cris_hash_table (info);
2092 1.1 skrll if (htab == NULL)
2093 1.1 skrll return false;
2094 1.1 skrll
2095 1.1 skrll /* Adjust the various PLT entry offsets. */
2096 1.1 skrll if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2097 1.1 skrll {
2098 1.1 skrll plt_off2 = 14;
2099 1.1 skrll plt_off3 = 20;
2100 1.1 skrll plt_off3_value_bias = -2;
2101 1.1 skrll plt_stub_offset = 12;
2102 1.1 skrll plt_entry_size = PLT_ENTRY_SIZE_V32;
2103 1.1 skrll plt_entry = elf_cris_plt_entry_v32;
2104 1.1 skrll plt_pic_entry = elf_cris_pic_plt_entry_v32;
2105 1.1 skrll }
2106 1.1 skrll
2107 1.1 skrll if (h->plt.offset != (bfd_vma) -1)
2108 1.1.1.2 christos {
2109 1.1 skrll asection *splt;
2110 1.1 skrll asection *sgotplt;
2111 1.1.1.9 christos asection *srela;
2112 1.1 skrll bfd_vma got_base;
2113 1.1.1.2 christos
2114 1.1.1.2 christos bfd_vma gotplt_offset
2115 1.1.1.2 christos = elf_cris_hash_entry (h)->gotplt_offset;
2116 1.1.1.2 christos Elf_Internal_Rela rela;
2117 1.1.1.2 christos bfd_byte *loc;
2118 1.1.1.2 christos bool has_gotplt = gotplt_offset != 0;
2119 1.1.1.2 christos
2120 1.1.1.2 christos /* Get the index in the .rela.plt relocations for the .got.plt
2121 1.1.1.2 christos entry that corresponds to this symbol.
2122 1.1.1.2 christos We have to count backwards here, and the result is only valid
2123 1.1.1.2 christos as an index into .rela.plt. We also have to undo the effect
2124 1.1.1.2 christos of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2125 1.1.1.2 christos .got.plt) for which gotplt_offset is adjusted, because while
2126 1.1 skrll that entry goes into .got.plt, its relocation goes into
2127 1.1 skrll .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2128 1.1 skrll processed as part of the runtime lazy .rela.plt relocation).
2129 1.1 skrll FIXME: There be literal constants here... */
2130 1.1 skrll bfd_vma rela_plt_index
2131 1.1 skrll = (htab->dtpmod_refcount != 0
2132 1.1 skrll ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2133 1.1 skrll
2134 1.1 skrll /* Get the offset into the .got table of the entry that corresponds
2135 1.1.1.2 christos to this function. Note that we embed knowledge that "incoming"
2136 1.1 skrll .got goes after .got.plt in the output without padding (pointer
2137 1.1 skrll aligned). However, that knowledge is present in several other
2138 1.1 skrll places too. */
2139 1.1 skrll bfd_vma got_offset
2140 1.1 skrll = (has_gotplt
2141 1.1 skrll ? gotplt_offset
2142 1.1.1.6 christos : h->got.offset + htab->next_gotplt_entry);
2143 1.1.1.6 christos
2144 1.1.1.6 christos /* This symbol has an entry in the procedure linkage table. Set it
2145 1.1 skrll up. */
2146 1.1 skrll
2147 1.1 skrll BFD_ASSERT (h->dynindx != -1);
2148 1.1 skrll
2149 1.1 skrll splt = htab->root.splt;
2150 1.1 skrll sgotplt = htab->root.sgotplt;
2151 1.1.1.4 christos srela = htab->root.srelplt;
2152 1.1 skrll BFD_ASSERT (splt != NULL && sgotplt != NULL
2153 1.1 skrll && (! has_gotplt || srela != NULL));
2154 1.1 skrll
2155 1.1 skrll got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2156 1.1 skrll
2157 1.1 skrll /* Fill in the entry in the procedure linkage table. */
2158 1.1 skrll if (! bfd_link_pic (info))
2159 1.1 skrll {
2160 1.1 skrll memcpy (splt->contents + h->plt.offset, plt_entry,
2161 1.1 skrll plt_entry_size);
2162 1.1 skrll
2163 1.1 skrll /* We need to enter the absolute address of the GOT entry here. */
2164 1.1 skrll bfd_put_32 (output_bfd, got_base + got_offset,
2165 1.1 skrll splt->contents + h->plt.offset + plt_off1);
2166 1.1 skrll }
2167 1.1 skrll else
2168 1.1 skrll {
2169 1.1 skrll memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2170 1.1 skrll plt_entry_size);
2171 1.1 skrll bfd_put_32 (output_bfd, got_offset,
2172 1.1 skrll splt->contents + h->plt.offset + plt_off1);
2173 1.1 skrll }
2174 1.1.1.2 christos
2175 1.1 skrll /* Fill in the plt entry and make a relocation, if this is a "real"
2176 1.1 skrll PLT entry. */
2177 1.1 skrll if (has_gotplt)
2178 1.1 skrll {
2179 1.1 skrll /* Fill in the offset to the reloc table. */
2180 1.1 skrll bfd_put_32 (output_bfd,
2181 1.1 skrll rela_plt_index * sizeof (Elf32_External_Rela),
2182 1.1 skrll splt->contents + h->plt.offset + plt_off2);
2183 1.1 skrll
2184 1.1 skrll /* Fill in the offset to the first PLT entry, where to "jump". */
2185 1.1 skrll bfd_put_32 (output_bfd,
2186 1.1 skrll - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2187 1.1 skrll splt->contents + h->plt.offset + plt_off3);
2188 1.1 skrll
2189 1.1 skrll /* Fill in the entry in the global offset table with the address of
2190 1.1 skrll the relocating stub. */
2191 1.1 skrll bfd_put_32 (output_bfd,
2192 1.1 skrll (splt->output_section->vma
2193 1.1 skrll + splt->output_offset
2194 1.1 skrll + h->plt.offset
2195 1.1 skrll + plt_stub_offset),
2196 1.1 skrll sgotplt->contents + got_offset);
2197 1.1.1.2 christos
2198 1.1 skrll /* Fill in the entry in the .rela.plt section. */
2199 1.1 skrll rela.r_offset = (sgotplt->output_section->vma
2200 1.1 skrll + sgotplt->output_offset
2201 1.1 skrll + got_offset);
2202 1.1 skrll rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2203 1.1 skrll rela.r_addend = 0;
2204 1.1 skrll loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2205 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2206 1.1 skrll }
2207 1.1 skrll
2208 1.1 skrll if (!h->def_regular)
2209 1.1 skrll {
2210 1.1 skrll /* Mark the symbol as undefined, rather than as defined in
2211 1.1 skrll the .plt section. Leave the value alone. */
2212 1.1 skrll sym->st_shndx = SHN_UNDEF;
2213 1.1 skrll
2214 1.1 skrll /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2215 1.1 skrll know whether resetting the value is significant; if it really
2216 1.1 skrll is, rather than a quirk or bug in the sparc port, then I
2217 1.1 skrll believe we'd see this elsewhere. */
2218 1.1 skrll /* If the symbol is weak, we do need to clear the value.
2219 1.1 skrll Otherwise, the PLT entry would provide a definition for
2220 1.1 skrll the symbol even if the symbol wasn't defined anywhere,
2221 1.1 skrll and so the symbol would never be NULL. */
2222 1.1 skrll if (!h->ref_regular_nonweak)
2223 1.1 skrll sym->st_value = 0;
2224 1.1 skrll }
2225 1.1 skrll }
2226 1.1.1.2 christos
2227 1.1.1.4 christos /* For an ordinary program, we emit .got relocs only for symbols that
2228 1.1 skrll are in the dynamic-symbols table and are either defined by the
2229 1.1 skrll program or are undefined weak symbols, or are function symbols
2230 1.1 skrll where we do not output a PLT: the PLT reloc was output above and all
2231 1.1 skrll references to the function symbol are redirected to the PLT. */
2232 1.1 skrll if (h->got.offset != (bfd_vma) -1
2233 1.1 skrll && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2234 1.1 skrll && (bfd_link_pic (info)
2235 1.1 skrll || (h->dynindx != -1
2236 1.1 skrll && h->plt.offset == (bfd_vma) -1
2237 1.1 skrll && !h->def_regular
2238 1.1 skrll && h->root.type != bfd_link_hash_undefweak)))
2239 1.1 skrll {
2240 1.1 skrll asection *sgot;
2241 1.1.1.6 christos asection *srela;
2242 1.1.1.6 christos Elf_Internal_Rela rela;
2243 1.1 skrll bfd_byte *loc;
2244 1.1 skrll bfd_byte *where;
2245 1.1 skrll
2246 1.1 skrll /* This symbol has an entry in the global offset table. Set it up. */
2247 1.1 skrll
2248 1.1 skrll sgot = htab->root.sgot;
2249 1.1 skrll srela = htab->root.srelgot;
2250 1.1 skrll BFD_ASSERT (sgot != NULL && srela != NULL);
2251 1.1 skrll
2252 1.1 skrll rela.r_offset = (sgot->output_section->vma
2253 1.1 skrll + sgot->output_offset
2254 1.1 skrll + (h->got.offset &~ (bfd_vma) 1));
2255 1.1 skrll
2256 1.1.1.4 christos /* If this is a static link, or it is a -Bsymbolic link and the
2257 1.1.1.4 christos symbol is defined locally or was forced to be local because
2258 1.1 skrll of a version file, we just want to emit a RELATIVE reloc.
2259 1.1 skrll The entry in the global offset table will already have been
2260 1.1 skrll initialized in the relocate_section function. */
2261 1.1 skrll where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2262 1.1 skrll if (! elf_hash_table (info)->dynamic_sections_created
2263 1.1 skrll || (bfd_link_pic (info)
2264 1.1 skrll && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
2265 1.1 skrll && h->def_regular))
2266 1.1 skrll {
2267 1.1 skrll rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2268 1.1 skrll rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2269 1.1 skrll }
2270 1.1 skrll else
2271 1.1 skrll {
2272 1.1 skrll bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2273 1.1 skrll rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2274 1.1 skrll rela.r_addend = 0;
2275 1.1 skrll }
2276 1.1 skrll
2277 1.1 skrll loc = srela->contents;
2278 1.1 skrll loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2279 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2280 1.1 skrll }
2281 1.1 skrll
2282 1.1 skrll if (h->needs_copy)
2283 1.1 skrll {
2284 1.1 skrll asection *s;
2285 1.1 skrll Elf_Internal_Rela rela;
2286 1.1 skrll bfd_byte *loc;
2287 1.1.1.6 christos
2288 1.1.1.6 christos /* This symbol needs a copy reloc. Set it up. */
2289 1.1.1.6 christos
2290 1.1.1.6 christos BFD_ASSERT (h->dynindx != -1
2291 1.1 skrll && (h->root.type == bfd_link_hash_defined
2292 1.1 skrll || h->root.type == bfd_link_hash_defweak));
2293 1.1 skrll
2294 1.1 skrll if (h->root.u.def.section == htab->root.sdynrelro)
2295 1.1 skrll s = htab->root.sreldynrelro;
2296 1.1 skrll else
2297 1.1 skrll s = htab->root.srelbss;
2298 1.1 skrll
2299 1.1 skrll rela.r_offset = (h->root.u.def.value
2300 1.1 skrll + h->root.u.def.section->output_section->vma
2301 1.1 skrll + h->root.u.def.section->output_offset);
2302 1.1.1.4 christos rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2303 1.1 skrll rela.r_addend = 0;
2304 1.1 skrll loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2305 1.1 skrll bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2306 1.1.1.9 christos }
2307 1.1 skrll
2308 1.1 skrll /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2309 1.1.1.2 christos if (h == elf_hash_table (info)->hdynamic
2310 1.1.1.2 christos || h == elf_hash_table (info)->hgot)
2311 1.1.1.2 christos sym->st_shndx = SHN_ABS;
2312 1.1 skrll
2313 1.1.1.9 christos return true;
2314 1.1.1.3 christos }
2315 1.1.1.3 christos
2316 1.1 skrll /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2318 1.1 skrll offsets were changed, as part of -z combreloc handling, from those we
2319 1.1 skrll computed. */
2320 1.1 skrll
2321 1.1 skrll static bool
2322 1.1 skrll elf_cris_finish_dynamic_sections (bfd *output_bfd,
2323 1.1.1.6 christos struct bfd_link_info *info)
2324 1.1 skrll {
2325 1.1.1.3 christos bfd *dynobj;
2326 1.1 skrll asection *sgot;
2327 1.1 skrll asection *sdyn;
2328 1.1 skrll
2329 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
2330 1.1 skrll
2331 1.1 skrll sgot = elf_hash_table (info)->sgotplt;
2332 1.1.1.6 christos BFD_ASSERT (sgot != NULL);
2333 1.1 skrll sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2334 1.1 skrll
2335 1.1 skrll if (elf_hash_table (info)->dynamic_sections_created)
2336 1.1 skrll {
2337 1.1 skrll asection *splt;
2338 1.1 skrll Elf32_External_Dyn *dyncon, *dynconend;
2339 1.1 skrll
2340 1.1 skrll splt = elf_hash_table (info)->splt;
2341 1.1 skrll BFD_ASSERT (splt != NULL && sdyn != NULL);
2342 1.1 skrll
2343 1.1 skrll dyncon = (Elf32_External_Dyn *) sdyn->contents;
2344 1.1 skrll dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2345 1.1 skrll for (; dyncon < dynconend; dyncon++)
2346 1.1 skrll {
2347 1.1 skrll Elf_Internal_Dyn dyn;
2348 1.1 skrll asection *s;
2349 1.1 skrll
2350 1.1.1.5 christos bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2351 1.1 skrll
2352 1.1 skrll switch (dyn.d_tag)
2353 1.1 skrll {
2354 1.1 skrll default:
2355 1.1 skrll break;
2356 1.1 skrll
2357 1.1.1.6 christos case DT_PLTGOT:
2358 1.1.1.5 christos dyn.d_un.d_ptr = sgot->output_section->vma + sgot->output_offset;
2359 1.1.1.5 christos bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2360 1.1 skrll break;
2361 1.1 skrll
2362 1.1 skrll case DT_JMPREL:
2363 1.1 skrll /* Yes, we *can* have a .plt and no .plt.rela, for instance
2364 1.1.1.6 christos if all symbols are found in the .got (not .got.plt). */
2365 1.1 skrll s = elf_hash_table (info)->srelplt;
2366 1.1 skrll dyn.d_un.d_ptr = s != NULL ? (s->output_section->vma
2367 1.1 skrll + s->output_offset) : 0;
2368 1.1 skrll bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2369 1.1 skrll break;
2370 1.1 skrll
2371 1.1 skrll case DT_PLTRELSZ:
2372 1.1 skrll s = elf_hash_table (info)->srelplt;
2373 1.1 skrll if (s == NULL)
2374 1.1 skrll dyn.d_un.d_val = 0;
2375 1.1 skrll else
2376 1.1 skrll dyn.d_un.d_val = s->size;
2377 1.1 skrll bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2378 1.1 skrll break;
2379 1.1.1.4 christos }
2380 1.1 skrll }
2381 1.1 skrll
2382 1.1 skrll /* Fill in the first entry in the procedure linkage table. */
2383 1.1 skrll if (splt->size > 0)
2384 1.1 skrll {
2385 1.1 skrll if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2386 1.1 skrll {
2387 1.1 skrll if (bfd_link_pic (info))
2388 1.1 skrll memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2389 1.1 skrll PLT_ENTRY_SIZE_V32);
2390 1.1 skrll else
2391 1.1 skrll {
2392 1.1 skrll memcpy (splt->contents, elf_cris_plt0_entry_v32,
2393 1.1 skrll PLT_ENTRY_SIZE_V32);
2394 1.1 skrll bfd_put_32 (output_bfd,
2395 1.1 skrll sgot->output_section->vma
2396 1.1 skrll + sgot->output_offset + 4,
2397 1.1.1.4 christos splt->contents + 4);
2398 1.1 skrll
2399 1.1 skrll elf_section_data (splt->output_section)->this_hdr.sh_entsize
2400 1.1 skrll = PLT_ENTRY_SIZE_V32;
2401 1.1 skrll }
2402 1.1 skrll }
2403 1.1 skrll else
2404 1.1 skrll {
2405 1.1 skrll if (bfd_link_pic (info))
2406 1.1 skrll memcpy (splt->contents, elf_cris_pic_plt0_entry,
2407 1.1 skrll PLT_ENTRY_SIZE);
2408 1.1 skrll else
2409 1.1 skrll {
2410 1.1 skrll memcpy (splt->contents, elf_cris_plt0_entry,
2411 1.1 skrll PLT_ENTRY_SIZE);
2412 1.1 skrll bfd_put_32 (output_bfd,
2413 1.1 skrll sgot->output_section->vma
2414 1.1 skrll + sgot->output_offset + 4,
2415 1.1 skrll splt->contents + 6);
2416 1.1.1.6 christos bfd_put_32 (output_bfd,
2417 1.1 skrll sgot->output_section->vma
2418 1.1 skrll + sgot->output_offset + 8,
2419 1.1 skrll splt->contents + 14);
2420 1.1 skrll
2421 1.1 skrll elf_section_data (splt->output_section)->this_hdr.sh_entsize
2422 1.1 skrll = PLT_ENTRY_SIZE;
2423 1.1 skrll }
2424 1.1 skrll }
2425 1.1 skrll }
2426 1.1 skrll }
2427 1.1 skrll
2428 1.1 skrll /* Fill in the first three entries in the global offset table. */
2429 1.1 skrll if (sgot->size > 0)
2430 1.1 skrll {
2431 1.1 skrll if (sdyn == NULL)
2432 1.1 skrll bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2433 1.1 skrll else
2434 1.1 skrll bfd_put_32 (output_bfd,
2435 1.1.1.9 christos sdyn->output_section->vma + sdyn->output_offset,
2436 1.1 skrll sgot->contents);
2437 1.1 skrll bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2438 1.1 skrll bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2439 1.1 skrll }
2440 1.1 skrll
2441 1.1 skrll elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2442 1.1 skrll
2443 1.1 skrll return true;
2444 1.1 skrll }
2445 1.1 skrll
2446 1.1 skrll /* Return the section that should be marked against GC for a given
2448 1.1.1.2 christos relocation. */
2449 1.1 skrll
2450 1.1.1.2 christos static asection *
2451 1.1 skrll cris_elf_gc_mark_hook (asection *sec,
2452 1.1 skrll struct bfd_link_info *info,
2453 1.1 skrll Elf_Internal_Rela *rel,
2454 1.1 skrll struct elf_link_hash_entry *h,
2455 1.1.1.2 christos Elf_Internal_Sym *sym)
2456 1.1.1.2 christos {
2457 1.1.1.2 christos enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2458 1.1 skrll if (h != NULL)
2459 1.1 skrll switch (r_type)
2460 1.1 skrll {
2461 1.1 skrll case R_CRIS_GNU_VTINHERIT:
2462 1.1 skrll case R_CRIS_GNU_VTENTRY:
2463 1.1.1.2 christos return NULL;
2464 1.1.1.2 christos
2465 1.1.1.2 christos default:
2466 1.1.1.3 christos break;
2467 1.1.1.3 christos }
2468 1.1.1.2 christos
2469 1.1.1.2 christos return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2470 1.1.1.3 christos }
2471 1.1.1.3 christos
2472 1.1.1.3 christos /* The elf_backend_plt_sym_val hook function. */
2473 1.1.1.3 christos
2474 1.1.1.3 christos static bfd_vma
2475 1.1.1.3 christos cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2476 1.1.1.3 christos const arelent *rel)
2477 1.1.1.3 christos {
2478 1.1.1.3 christos bfd_size_type plt_entry_size;
2479 1.1.1.3 christos bfd_size_type pltoffs;
2480 1.1.1.3 christos bfd *abfd = plt->owner;
2481 1.1.1.3 christos
2482 1.1.1.3 christos /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2483 1.1.1.2 christos bfd_size_type plt_entry_got_offset = 2;
2484 1.1.1.8 christos bfd_size_type plt_sec_size;
2485 1.1.1.2 christos bfd_size_type got_vma_for_dyn;
2486 1.1.1.3 christos asection *got;
2487 1.1.1.2 christos
2488 1.1.1.2 christos /* FIXME: the .got section should be readily available also when
2489 1.1.1.3 christos we're not linking. */
2490 1.1.1.3 christos if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2491 1.1.1.3 christos return (bfd_vma) -1;
2492 1.1.1.3 christos
2493 1.1.1.3 christos plt_sec_size = bfd_section_size (plt);
2494 1.1.1.3 christos plt_entry_size
2495 1.1.1.3 christos = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2496 1.1.1.3 christos ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2497 1.1.1.3 christos
2498 1.1.1.3 christos /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2499 1.1.1.3 christos got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2500 1.1.1.3 christos
2501 1.1.1.3 christos /* Because we can have merged GOT entries; a single .got entry for
2502 1.1.1.3 christos both GOT and the PLT part of the GOT (.got.plt), the index of the
2503 1.1.1.3 christos reloc in .rela.plt is not the same as the index in the PLT.
2504 1.1.1.3 christos Instead, we have to hunt down the GOT offset in the PLT that
2505 1.1.1.3 christos corresponds to that of this reloc. Unfortunately, we will only
2506 1.1.1.3 christos be called for the .rela.plt relocs, so we'll miss synthetic
2507 1.1.1.3 christos symbols for .plt entries with merged GOT entries. (FIXME:
2508 1.1.1.3 christos fixable by providing our own bfd_elf32_get_synthetic_symtab.
2509 1.1.1.3 christos Doesn't seem worthwile at time of this writing.) FIXME: we've
2510 1.1.1.4 christos gone from O(1) to O(N) (N number of PLT entries) for finding each
2511 1.1.1.3 christos PLT address. Shouldn't matter in practice though. */
2512 1.1.1.3 christos
2513 1.1.1.3 christos for (pltoffs = plt_entry_size;
2514 1.1.1.3 christos pltoffs < plt_sec_size;
2515 1.1.1.3 christos pltoffs += plt_entry_size)
2516 1.1.1.3 christos {
2517 1.1.1.3 christos bfd_size_type got_offset;
2518 1.1.1.3 christos bfd_byte gotoffs_raw[4];
2519 1.1.1.3 christos
2520 1.1.1.3 christos if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2521 1.1.1.3 christos pltoffs + plt_entry_got_offset,
2522 1.1.1.3 christos sizeof (gotoffs_raw)))
2523 1.1.1.3 christos return (bfd_vma) -1;
2524 1.1.1.2 christos
2525 1.1.1.2 christos got_offset = bfd_get_32 (abfd, gotoffs_raw);
2526 1.1 skrll if (got_offset + got_vma_for_dyn == rel->address)
2527 1.1 skrll return plt->vma + pltoffs;
2528 1.1 skrll }
2529 1.1 skrll
2530 1.1 skrll /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2531 1.1 skrll that'd not be graceful behavior for invalid input. */
2532 1.1 skrll return (bfd_vma) -1;
2533 1.1.1.9 christos }
2534 1.1.1.3 christos
2535 1.1 skrll /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2536 1.1 skrll entry but we found we will not create any. Called when we find we will
2537 1.1 skrll not have any PLT for this symbol, by for example
2538 1.1.1.3 christos elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2539 1.1.1.6 christos or elf_cris_size_dynamic_sections if no dynamic sections will be
2540 1.1.1.3 christos created (we're only linking static objects). */
2541 1.1.1.6 christos
2542 1.1.1.3 christos static bool
2543 1.1 skrll elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2544 1.1 skrll {
2545 1.1 skrll struct bfd_link_info *info = (struct bfd_link_info *) p;
2546 1.1.1.9 christos
2547 1.1 skrll /* A GOTPLT reloc, when activated, is supposed to be included into
2548 1.1.1.2 christos the PLT refcount, when the symbol isn't set-or-forced local. */
2549 1.1 skrll BFD_ASSERT (h->gotplt_refcount == 0
2550 1.1.1.2 christos || h->root.plt.refcount == -1
2551 1.1.1.2 christos || h->gotplt_refcount <= h->root.plt.refcount);
2552 1.1 skrll
2553 1.1 skrll /* If nobody wanted a GOTPLT with this symbol, we're done. */
2554 1.1.1.2 christos if (h->gotplt_refcount <= 0)
2555 1.1 skrll return true;
2556 1.1 skrll
2557 1.1 skrll if (h->reg_got_refcount > 0)
2558 1.1 skrll {
2559 1.1 skrll /* There's a GOT entry for this symbol. Just adjust the refcounts.
2560 1.1 skrll Probably not necessary at this stage, but keeping them accurate
2561 1.1 skrll helps avoiding surprises later. */
2562 1.1 skrll h->root.got.refcount += h->gotplt_refcount;
2563 1.1.1.6 christos h->reg_got_refcount += h->gotplt_refcount;
2564 1.1.1.6 christos h->gotplt_refcount = 0;
2565 1.1 skrll }
2566 1.1.1.2 christos else
2567 1.1.1.6 christos {
2568 1.1.1.2 christos /* No GOT entry for this symbol. We need to create one. */
2569 1.1.1.2 christos asection *sgot;
2570 1.1 skrll asection *srelgot;
2571 1.1 skrll
2572 1.1 skrll sgot = elf_hash_table (info)->sgot;
2573 1.1 skrll srelgot = elf_hash_table (info)->srelgot;
2574 1.1 skrll
2575 1.1 skrll /* Put accurate refcounts there. */
2576 1.1 skrll BFD_ASSERT (h->root.got.refcount >= 0);
2577 1.1 skrll h->root.got.refcount += h->gotplt_refcount;
2578 1.1 skrll h->reg_got_refcount = h->gotplt_refcount;
2579 1.1 skrll
2580 1.1 skrll h->gotplt_refcount = 0;
2581 1.1 skrll
2582 1.1 skrll /* We always have a .got and a .rela.got section if there were
2583 1.1 skrll GOTPLT relocs in input. */
2584 1.1.1.9 christos BFD_ASSERT (sgot != NULL && srelgot != NULL);
2585 1.1 skrll
2586 1.1 skrll /* Allocate space in the .got section. */
2587 1.1 skrll sgot->size += 4;
2588 1.1 skrll
2589 1.1 skrll /* Allocate relocation space. */
2590 1.1 skrll srelgot->size += sizeof (Elf32_External_Rela);
2591 1.1 skrll }
2592 1.1 skrll
2593 1.1 skrll return true;
2594 1.1 skrll }
2595 1.1 skrll
2596 1.1 skrll /* Try to fold PLT entries with GOT entries. There are two cases when we
2597 1.1 skrll want to do this:
2598 1.1 skrll
2599 1.1 skrll - When all PLT references are GOTPLT references, and there are GOT
2600 1.1 skrll references, and this is not the executable. We don't have to
2601 1.1 skrll generate a PLT at all.
2602 1.1 skrll
2603 1.1 skrll - When there are both (ordinary) PLT references and GOT references,
2604 1.1 skrll and this isn't the executable.
2605 1.1 skrll We want to make the PLT reference use the ordinary GOT entry rather
2606 1.1 skrll than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2607 1.1 skrll since the GOT entry will have to be resolved at startup anyway.
2608 1.1 skrll
2609 1.1 skrll Though the latter case is handled when room for the PLT is allocated,
2610 1.1 skrll not here.
2611 1.1.1.9 christos
2612 1.1.1.3 christos By folding into the GOT, we may need a round-trip to a PLT in the
2613 1.1 skrll executable for calls, a loss in performance. Still, losing a
2614 1.1 skrll reloc is a win in size and at least in start-up time.
2615 1.1 skrll
2616 1.1 skrll Note that this function is called before symbols are forced local by
2617 1.1 skrll version scripts. The differing cases are handled by
2618 1.1 skrll elf_cris_hide_symbol. */
2619 1.1 skrll
2620 1.1.1.9 christos static bool
2621 1.1 skrll elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2622 1.1 skrll {
2623 1.1 skrll struct bfd_link_info *info = (struct bfd_link_info *) p;
2624 1.1 skrll
2625 1.1 skrll /* If there are no GOT references for this symbol, we can't fold any
2626 1.1 skrll other reference so there's nothing to do. Likewise if there are no
2627 1.1 skrll PLT references; GOTPLT references included. */
2628 1.1 skrll if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2629 1.1 skrll return true;
2630 1.1.1.9 christos
2631 1.1 skrll /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2632 1.1 skrll BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2633 1.1 skrll
2634 1.1 skrll if (h->gotplt_refcount == h->root.plt.refcount)
2635 1.1 skrll {
2636 1.1.1.9 christos /* The only PLT references are GOTPLT references, and there are GOT
2637 1.1 skrll references. Convert PLT to GOT references. */
2638 1.1 skrll if (! elf_cris_adjust_gotplt_to_got (h, info))
2639 1.1 skrll return false;
2640 1.1 skrll
2641 1.1 skrll /* Clear the PLT references, so no PLT will be created. */
2642 1.1 skrll h->root.plt.offset = (bfd_vma) -1;
2643 1.1 skrll }
2644 1.1.1.3 christos
2645 1.1.1.3 christos return true;
2646 1.1.1.9 christos }
2647 1.1 skrll
2648 1.1 skrll /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2649 1.1 skrll to use a GOT entry (and create one) rather than requiring a GOTPLT
2650 1.1 skrll entry. */
2651 1.1 skrll
2652 1.1 skrll static void
2653 1.1 skrll elf_cris_hide_symbol (struct bfd_link_info *info,
2654 1.1 skrll struct elf_link_hash_entry *h,
2655 1.1 skrll bool force_local)
2656 1.1 skrll {
2657 1.1 skrll elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2658 1.1 skrll
2659 1.1.1.9 christos _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2660 1.1.1.2 christos }
2661 1.1.1.2 christos
2662 1.1 skrll /* Adjust a symbol defined by a dynamic object and referenced by a
2663 1.1.1.2 christos regular object. The current definition is in some section of the
2664 1.1 skrll dynamic object, but we're not including those sections. We have to
2665 1.1 skrll change the definition to something the rest of the link can
2666 1.1.1.6 christos understand. */
2667 1.1 skrll
2668 1.1 skrll static bool
2669 1.1.1.2 christos elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2670 1.1.1.2 christos struct elf_link_hash_entry *h)
2671 1.1.1.9 christos {
2672 1.1.1.2 christos struct elf_cris_link_hash_table * htab;
2673 1.1.1.6 christos bfd *dynobj;
2674 1.1 skrll asection *s;
2675 1.1 skrll asection *srel;
2676 1.1 skrll bfd_size_type plt_entry_size;
2677 1.1 skrll
2678 1.1.1.6 christos htab = elf_cris_hash_table (info);
2679 1.1 skrll if (htab == NULL)
2680 1.1 skrll return false;
2681 1.1 skrll
2682 1.1 skrll dynobj = htab->root.dynobj;
2683 1.1 skrll
2684 1.1 skrll /* Make sure we know what is going on here. */
2685 1.1 skrll BFD_ASSERT (dynobj != NULL
2686 1.1 skrll && (h->needs_plt
2687 1.1 skrll || h->is_weakalias
2688 1.1 skrll || (h->def_dynamic
2689 1.1 skrll && h->ref_regular
2690 1.1 skrll && !h->def_regular)));
2691 1.1 skrll
2692 1.1 skrll plt_entry_size
2693 1.1 skrll = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2694 1.1 skrll ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2695 1.1 skrll
2696 1.1 skrll /* If this is a function, put it in the procedure linkage table. We
2697 1.1 skrll will fill in the contents of the procedure linkage table later,
2698 1.1 skrll when we know the address of the .got section. */
2699 1.1.1.4 christos if (h->type == STT_FUNC
2700 1.1 skrll || h->needs_plt)
2701 1.1 skrll {
2702 1.1 skrll /* If we link a program (not a DSO), we'll get rid of unnecessary
2703 1.1 skrll PLT entries; we point to the actual symbols -- even for pic
2704 1.1 skrll relocs, because a program built with -fpic should have the same
2705 1.1 skrll result as one built without -fpic, specifically considering weak
2706 1.1 skrll symbols.
2707 1.1 skrll FIXME: m68k and i386 differ here, for unclear reasons. */
2708 1.1 skrll if (! bfd_link_pic (info)
2709 1.1 skrll && !h->def_dynamic)
2710 1.1 skrll {
2711 1.1 skrll /* This case can occur if we saw a PLT reloc in an input file,
2712 1.1 skrll but the symbol was not defined by a dynamic object. In such
2713 1.1 skrll a case, we don't actually need to build a procedure linkage
2714 1.1 skrll table, and we can just do an absolute or PC reloc instead, or
2715 1.1 skrll change a .got.plt index to a .got index for GOTPLT relocs. */
2716 1.1 skrll BFD_ASSERT (h->needs_plt);
2717 1.1 skrll h->needs_plt = 0;
2718 1.1 skrll h->plt.offset = (bfd_vma) -1;
2719 1.1 skrll return
2720 1.1 skrll elf_cris_adjust_gotplt_to_got ((struct
2721 1.1.1.4 christos elf_cris_link_hash_entry *) h,
2722 1.1 skrll info);
2723 1.1 skrll }
2724 1.1.1.9 christos
2725 1.1 skrll /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2726 1.1 skrll where a pointer-equivalent symbol was unimportant (i.e. more
2727 1.1 skrll like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2728 1.1 skrll of the PLT. We can't for the executable, because the GOT
2729 1.1 skrll entries will point to the PLT there (and be constant). */
2730 1.1 skrll if (bfd_link_pic (info)
2731 1.1.1.9 christos && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2732 1.1 skrll h, info))
2733 1.1 skrll return false;
2734 1.1 skrll
2735 1.1 skrll /* GC or folding may have rendered this entry unused. */
2736 1.1 skrll if (h->plt.refcount <= 0)
2737 1.1 skrll {
2738 1.1.1.9 christos h->needs_plt = 0;
2739 1.1 skrll h->plt.offset = (bfd_vma) -1;
2740 1.1 skrll return true;
2741 1.1.1.6 christos }
2742 1.1 skrll
2743 1.1 skrll /* Make sure this symbol is output as a dynamic symbol. */
2744 1.1 skrll if (h->dynindx == -1)
2745 1.1 skrll {
2746 1.1 skrll if (! bfd_elf_link_record_dynamic_symbol (info, h))
2747 1.1 skrll return false;
2748 1.1 skrll }
2749 1.1 skrll
2750 1.1 skrll s = htab->root.splt;
2751 1.1 skrll BFD_ASSERT (s != NULL);
2752 1.1.1.4 christos
2753 1.1 skrll /* If this is the first .plt entry, make room for the special
2754 1.1 skrll first entry. */
2755 1.1 skrll if (s->size == 0)
2756 1.1 skrll s->size += plt_entry_size;
2757 1.1 skrll
2758 1.1 skrll /* If this symbol is not defined in a regular file, and we are
2759 1.1 skrll not generating a shared library, then set the symbol to this
2760 1.1 skrll location in the .plt. */
2761 1.1 skrll if (!bfd_link_pic (info)
2762 1.1 skrll && !h->def_regular)
2763 1.1 skrll {
2764 1.1 skrll h->root.u.def.section = s;
2765 1.1.1.4 christos h->root.u.def.value = s->size;
2766 1.1 skrll }
2767 1.1 skrll
2768 1.1 skrll /* If there's already a GOT entry, use that, not a .got.plt. A
2769 1.1 skrll GOT field still has a reference count when we get here; it's
2770 1.1 skrll not yet changed to an offset. We can't do this for an
2771 1.1 skrll executable, because then the reloc associated with the PLT
2772 1.1 skrll would get a non-PLT reloc pointing to the PLT. FIXME: Move
2773 1.1 skrll this to elf_cris_try_fold_plt_to_got. */
2774 1.1 skrll if (bfd_link_pic (info) && h->got.refcount > 0)
2775 1.1 skrll {
2776 1.1 skrll h->got.refcount += h->plt.refcount;
2777 1.1 skrll
2778 1.1 skrll /* Mark the PLT offset to use the GOT entry by setting the low
2779 1.1 skrll bit in the plt offset; it is always a multiple of
2780 1.1 skrll plt_entry_size (which is at least a multiple of 2). */
2781 1.1 skrll BFD_ASSERT ((s->size % plt_entry_size) == 0);
2782 1.1 skrll
2783 1.1 skrll /* Change the PLT refcount to an offset. */
2784 1.1 skrll h->plt.offset = s->size;
2785 1.1.1.9 christos
2786 1.1 skrll /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2787 1.1 skrll that the got entry should be used instead. */
2788 1.1 skrll BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2789 1.1 skrll h)->gotplt_offset == 0);
2790 1.1 skrll
2791 1.1 skrll /* Make room for this entry. */
2792 1.1 skrll s->size += plt_entry_size;
2793 1.1 skrll
2794 1.1 skrll return true;
2795 1.1 skrll }
2796 1.1 skrll
2797 1.1.1.2 christos /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2798 1.1.1.2 christos h->plt.offset = s->size;
2799 1.1 skrll
2800 1.1.1.6 christos /* Make room for this entry. */
2801 1.1 skrll s->size += plt_entry_size;
2802 1.1 skrll
2803 1.1 skrll /* We also need to make an entry in the .got.plt section, which
2804 1.1 skrll will be placed in the .got section by the linker script. */
2805 1.1 skrll ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2806 1.1.1.6 christos = htab->next_gotplt_entry;
2807 1.1 skrll htab->next_gotplt_entry += 4;
2808 1.1 skrll
2809 1.1 skrll s = htab->root.sgotplt;
2810 1.1.1.9 christos BFD_ASSERT (s != NULL);
2811 1.1 skrll s->size += 4;
2812 1.1 skrll
2813 1.1 skrll /* We also need to make an entry in the .rela.plt section. */
2814 1.1 skrll
2815 1.1 skrll s = htab->root.srelplt;
2816 1.1 skrll BFD_ASSERT (s != NULL);
2817 1.1 skrll s->size += sizeof (Elf32_External_Rela);
2818 1.1 skrll
2819 1.1 skrll return true;
2820 1.1.1.6 christos }
2821 1.1 skrll
2822 1.1.1.6 christos /* Reinitialize the plt offset now that it is not used as a reference
2823 1.1.1.6 christos count any more. */
2824 1.1.1.6 christos h->plt.offset = (bfd_vma) -1;
2825 1.1.1.6 christos
2826 1.1.1.9 christos /* If this is a weak symbol, and there is a real definition, the
2827 1.1 skrll processor independent code will have arranged for us to see the
2828 1.1 skrll real definition first, and we can just use the same value. */
2829 1.1 skrll if (h->is_weakalias)
2830 1.1 skrll {
2831 1.1 skrll struct elf_link_hash_entry *def = weakdef (h);
2832 1.1 skrll BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2833 1.1 skrll h->root.u.def.section = def->root.u.def.section;
2834 1.1 skrll h->root.u.def.value = def->root.u.def.value;
2835 1.1 skrll return true;
2836 1.1.1.4 christos }
2837 1.1.1.9 christos
2838 1.1 skrll /* This is a reference to a symbol defined by a dynamic object which
2839 1.1 skrll is not a function. */
2840 1.1 skrll
2841 1.1 skrll /* If we are creating a shared library, we must presume that the
2842 1.1.1.9 christos only references to the symbol are via the global offset table.
2843 1.1 skrll For such cases we need not do anything here; the relocations will
2844 1.1 skrll be handled correctly by relocate_section. */
2845 1.1 skrll if (bfd_link_pic (info))
2846 1.1 skrll return true;
2847 1.1 skrll
2848 1.1 skrll /* If there are no references to this symbol that do not use the
2849 1.1 skrll GOT, we don't need to generate a copy reloc. */
2850 1.1 skrll if (!h->non_got_ref)
2851 1.1 skrll return true;
2852 1.1 skrll
2853 1.1 skrll /* We must allocate the symbol in our .dynbss section, which will
2854 1.1 skrll become part of the .bss section of the executable. There will be
2855 1.1 skrll an entry for this symbol in the .dynsym section. The dynamic
2856 1.1 skrll object will contain position independent code, so all references
2857 1.1 skrll from the dynamic object to this symbol will go through the global
2858 1.1.1.6 christos offset table. The dynamic linker will use the .dynsym entry to
2859 1.1.1.6 christos determine the address it must put in the global offset table, so
2860 1.1.1.6 christos both the dynamic object and the regular object will refer to the
2861 1.1.1.6 christos same memory location for the variable. */
2862 1.1.1.6 christos
2863 1.1.1.6 christos /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2864 1.1.1.6 christos copy the initial value out of the dynamic object and into the
2865 1.1.1.6 christos runtime process image. We need to remember the offset into the
2866 1.1.1.6 christos .rela.bss section we are going to use. */
2867 1.1.1.6 christos
2868 1.1.1.6 christos if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2869 1.1.1.3 christos {
2870 1.1 skrll s = htab->root.sdynrelro;
2871 1.1 skrll srel = htab->root.sreldynrelro;
2872 1.1 skrll }
2873 1.1 skrll else
2874 1.1 skrll {
2875 1.1 skrll s = htab->root.sdynbss;
2876 1.1.1.6 christos srel = htab->root.srelbss;
2877 1.1.1.6 christos }
2878 1.1.1.4 christos if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2879 1.1 skrll {
2880 1.1 skrll BFD_ASSERT (srel != NULL);
2881 1.1.1.2 christos srel->size += sizeof (Elf32_External_Rela);
2882 1.1.1.2 christos h->needs_copy = 1;
2883 1.1.1.2 christos }
2884 1.1.1.2 christos
2885 1.1.1.2 christos BFD_ASSERT (s != NULL);
2886 1.1.1.2 christos
2887 1.1.1.2 christos return _bfd_elf_adjust_dynamic_copy (info, h, s);
2888 1.1.1.2 christos }
2889 1.1.1.2 christos
2890 1.1.1.2 christos /* Adjust our "subclass" elements for an indirect symbol. */
2891 1.1.1.2 christos
2892 1.1.1.2 christos static void
2893 1.1.1.2 christos elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
2894 1.1.1.2 christos struct elf_link_hash_entry *dir,
2895 1.1.1.2 christos struct elf_link_hash_entry *ind)
2896 1.1.1.2 christos {
2897 1.1.1.2 christos struct elf_cris_link_hash_entry *edir, *eind;
2898 1.1.1.2 christos
2899 1.1.1.2 christos edir = (struct elf_cris_link_hash_entry *) dir;
2900 1.1.1.2 christos eind = (struct elf_cris_link_hash_entry *) ind;
2901 1.1.1.2 christos
2902 1.1.1.2 christos /* Only indirect symbols are replaced; we're not interested in
2903 1.1.1.2 christos updating any of EIND's fields for other symbols. */
2904 1.1.1.2 christos if (eind->root.root.type != bfd_link_hash_indirect)
2905 1.1.1.2 christos {
2906 1.1.1.2 christos /* Still, we need to copy flags for e.g. weak definitions. */
2907 1.1.1.2 christos _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2908 1.1.1.2 christos return;
2909 1.1.1.2 christos }
2910 1.1.1.2 christos
2911 1.1.1.2 christos BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
2912 1.1.1.2 christos
2913 1.1.1.2 christos #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
2914 1.1.1.2 christos #define XMOVE(F) XMOVOPZ (F, +=, 0)
2915 1.1.1.2 christos if (eind->pcrel_relocs_copied != NULL)
2916 1.1.1.2 christos {
2917 1.1.1.2 christos if (edir->pcrel_relocs_copied != NULL)
2918 1.1.1.2 christos {
2919 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied **pp;
2920 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied *p;
2921 1.1.1.2 christos
2922 1.1.1.2 christos /* Add reloc counts against the indirect sym to the direct sym
2923 1.1.1.2 christos list. Merge any entries against the same section. */
2924 1.1.1.2 christos for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
2925 1.1.1.2 christos {
2926 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied *q;
2927 1.1.1.2 christos p = *pp;
2928 1.1.1.2 christos for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
2929 1.1.1.2 christos if (q->section == p->section)
2930 1.1.1.2 christos {
2931 1.1.1.2 christos q->count += p->count;
2932 1.1.1.2 christos *pp = p->next;
2933 1.1.1.2 christos break;
2934 1.1.1.2 christos }
2935 1.1.1.2 christos if (q == NULL)
2936 1.1.1.2 christos pp = &p->next;
2937 1.1.1.2 christos }
2938 1.1.1.2 christos *pp = edir->pcrel_relocs_copied;
2939 1.1.1.2 christos }
2940 1.1.1.2 christos XMOVOPZ (pcrel_relocs_copied, =, NULL);
2941 1.1.1.2 christos }
2942 1.1.1.2 christos XMOVE (gotplt_refcount);
2943 1.1.1.2 christos XMOVE (gotplt_offset);
2944 1.1 skrll XMOVE (reg_got_refcount);
2945 1.1 skrll XMOVE (tprel_refcount);
2946 1.1.1.9 christos XMOVE (dtp_refcount);
2947 1.1.1.2 christos #undef XMOVE
2948 1.1.1.2 christos #undef XMOVOPZ
2949 1.1.1.2 christos
2950 1.1.1.2 christos _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2951 1.1 skrll }
2952 1.1.1.2 christos
2953 1.1 skrll /* Look through the relocs for a section during the first phase. */
2954 1.1 skrll
2955 1.1 skrll static bool
2956 1.1 skrll cris_elf_check_relocs (bfd *abfd,
2957 1.1 skrll struct bfd_link_info *info,
2958 1.1 skrll asection *sec,
2959 1.1 skrll const Elf_Internal_Rela *relocs)
2960 1.1 skrll {
2961 1.1 skrll struct elf_cris_link_hash_table * htab;
2962 1.1 skrll bfd *dynobj;
2963 1.1.1.4 christos Elf_Internal_Shdr *symtab_hdr;
2964 1.1.1.9 christos struct elf_link_hash_entry **sym_hashes;
2965 1.1 skrll bfd_signed_vma *local_got_refcounts;
2966 1.1.1.2 christos const Elf_Internal_Rela *rel;
2967 1.1.1.2 christos const Elf_Internal_Rela *rel_end;
2968 1.1.1.9 christos asection *sgot;
2969 1.1.1.2 christos asection *srelgot;
2970 1.1 skrll asection *sreloc;
2971 1.1 skrll
2972 1.1 skrll if (bfd_link_relocatable (info))
2973 1.1 skrll return true;
2974 1.1 skrll
2975 1.1 skrll htab = elf_cris_hash_table (info);
2976 1.1 skrll if (htab == NULL)
2977 1.1 skrll return false;
2978 1.1 skrll
2979 1.1 skrll dynobj = elf_hash_table (info)->dynobj;
2980 1.1 skrll symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2981 1.1 skrll sym_hashes = elf_sym_hashes (abfd);
2982 1.1 skrll local_got_refcounts = elf_local_got_refcounts (abfd);
2983 1.1 skrll
2984 1.1 skrll sgot = NULL;
2985 1.1.1.2 christos srelgot = NULL;
2986 1.1.1.2 christos sreloc = NULL;
2987 1.1 skrll
2988 1.1 skrll rel_end = relocs + sec->reloc_count;
2989 1.1 skrll for (rel = relocs; rel < rel_end; rel++)
2990 1.1.1.2 christos {
2991 1.1.1.2 christos struct elf_link_hash_entry *h;
2992 1.1.1.2 christos unsigned long r_symndx;
2993 1.1.1.2 christos enum elf_cris_reloc_type r_type;
2994 1.1 skrll bfd_signed_vma got_element_size = 4;
2995 1.1 skrll unsigned long r_symndx_lgot = INT_MAX;
2996 1.1 skrll
2997 1.1 skrll r_symndx = ELF32_R_SYM (rel->r_info);
2998 1.1 skrll if (r_symndx < symtab_hdr->sh_info)
2999 1.1 skrll {
3000 1.1 skrll h = NULL;
3001 1.1 skrll r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3002 1.1 skrll }
3003 1.1 skrll else
3004 1.1 skrll {
3005 1.1 skrll h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3006 1.1 skrll while (h->root.type == bfd_link_hash_indirect
3007 1.1 skrll || h->root.type == bfd_link_hash_warning)
3008 1.1.1.2 christos h = (struct elf_link_hash_entry *) h->root.u.i.link;
3009 1.1.1.2 christos }
3010 1.1.1.2 christos
3011 1.1.1.2 christos r_type = ELF32_R_TYPE (rel->r_info);
3012 1.1.1.2 christos
3013 1.1.1.2 christos /* Some relocs require linker-created sections; we need to hang them
3014 1.1.1.2 christos on the first input bfd we found that contained dynamic relocs. */
3015 1.1.1.2 christos switch (r_type)
3016 1.1.1.2 christos {
3017 1.1.1.2 christos case R_CRIS_32_DTPREL:
3018 1.1.1.2 christos if ((sec->flags & SEC_ALLOC) == 0)
3019 1.1.1.2 christos /* This'd be a .dtpreld entry in e.g. debug info. We have
3020 1.1.1.2 christos several different switch statements below, but none of
3021 1.1.1.2 christos that is needed; we need no preparations for resolving
3022 1.1.1.2 christos R_CRIS_32_DTPREL into a non-allocated section (debug
3023 1.1.1.2 christos info), so let's just move on to the next
3024 1.1.1.2 christos relocation. */
3025 1.1.1.2 christos continue;
3026 1.1.1.2 christos /* Fall through. */
3027 1.1.1.2 christos case R_CRIS_16_DTPREL:
3028 1.1.1.2 christos /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3029 1.1.1.2 christos entry at index 3. */
3030 1.1.1.2 christos if (htab->dtpmod_refcount == 0)
3031 1.1.1.2 christos htab->next_gotplt_entry += 8;
3032 1.1.1.2 christos
3033 1.1 skrll htab->dtpmod_refcount++;
3034 1.1 skrll /* Fall through. */
3035 1.1 skrll
3036 1.1 skrll case R_CRIS_32_IE:
3037 1.1 skrll case R_CRIS_32_GD:
3038 1.1 skrll case R_CRIS_16_GOT_GD:
3039 1.1 skrll case R_CRIS_32_GOT_GD:
3040 1.1 skrll case R_CRIS_32_GOT_TPREL:
3041 1.1 skrll case R_CRIS_16_GOT_TPREL:
3042 1.1 skrll case R_CRIS_16_GOT:
3043 1.1 skrll case R_CRIS_32_GOT:
3044 1.1 skrll case R_CRIS_32_GOTREL:
3045 1.1 skrll case R_CRIS_32_PLT_GOTREL:
3046 1.1 skrll case R_CRIS_32_PLT_PCREL:
3047 1.1 skrll case R_CRIS_16_GOTPLT:
3048 1.1 skrll case R_CRIS_32_GOTPLT:
3049 1.1.1.6 christos if (dynobj == NULL)
3050 1.1.1.6 christos {
3051 1.1.1.7 christos elf_hash_table (info)->dynobj = dynobj = abfd;
3052 1.1 skrll
3053 1.1 skrll /* We could handle this if we can get a handle on the
3054 1.1.1.9 christos output bfd in elf_cris_adjust_dynamic_symbol. Failing
3055 1.1 skrll that, we must insist on dynobj being a specific mach. */
3056 1.1.1.4 christos if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3057 1.1 skrll {
3058 1.1.1.4 christos _bfd_error_handler
3059 1.1.1.4 christos /* xgettext:c-format */
3060 1.1.1.4 christos (_("%pB, section %pA: v10/v32 compatible object"
3061 1.1.1.4 christos " must not contain a PIC relocation"),
3062 1.1.1.4 christos abfd, sec);
3063 1.1.1.4 christos return false;
3064 1.1.1.4 christos }
3065 1.1 skrll }
3066 1.1.1.9 christos
3067 1.1.1.2 christos if (sgot == NULL)
3068 1.1.1.6 christos {
3069 1.1.1.6 christos /* We may have a dynobj but no .got section, if machine-
3070 1.1.1.4 christos independent parts of the linker found a reason to create
3071 1.1.1.2 christos a dynobj. We want to create the .got section now, so we
3072 1.1.1.2 christos can assume it's always present whenever there's a dynobj.
3073 1.1.1.2 christos It's ok to call this function more than once. */
3074 1.1.1.2 christos if (!_bfd_elf_create_got_section (dynobj, info))
3075 1.1.1.2 christos return false;
3076 1.1.1.2 christos
3077 1.1.1.2 christos sgot = elf_hash_table (info)->sgot;
3078 1.1.1.2 christos srelgot = elf_hash_table (info)->srelgot;
3079 1.1.1.2 christos }
3080 1.1.1.2 christos
3081 1.1.1.2 christos if (local_got_refcounts == NULL)
3082 1.1.1.2 christos {
3083 1.1.1.9 christos bfd_size_type amt;
3084 1.1.1.2 christos
3085 1.1.1.2 christos /* We use index local_got_refcounts[-1] to count all
3086 1.1.1.2 christos GOT-relative relocations that do not have explicit
3087 1.1.1.2 christos GOT entries. */
3088 1.1 skrll amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3089 1.1 skrll amt *= sizeof (bfd_signed_vma);
3090 1.1 skrll local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3091 1.1 skrll if (local_got_refcounts == NULL)
3092 1.1 skrll return false;
3093 1.1 skrll
3094 1.1.1.2 christos local_got_refcounts++;
3095 1.1.1.2 christos elf_local_got_refcounts (abfd) = local_got_refcounts;
3096 1.1.1.2 christos }
3097 1.1.1.2 christos break;
3098 1.1.1.2 christos
3099 1.1.1.2 christos default:
3100 1.1.1.2 christos break;
3101 1.1.1.4 christos }
3102 1.1 skrll
3103 1.1.1.6 christos /* Warn and error for invalid input. */
3104 1.1.1.6 christos switch (r_type)
3105 1.1.1.7 christos {
3106 1.1.1.2 christos case R_CRIS_32_IE:
3107 1.1.1.2 christos case R_CRIS_32_TPREL:
3108 1.1.1.2 christos case R_CRIS_16_TPREL:
3109 1.1.1.2 christos case R_CRIS_32_GD:
3110 1.1.1.2 christos if (bfd_link_pic (info))
3111 1.1.1.2 christos {
3112 1.1.1.2 christos _bfd_error_handler
3113 1.1.1.2 christos /* xgettext:c-format */
3114 1.1.1.2 christos (_("%pB, section %pA:\n relocation %s not valid"
3115 1.1.1.2 christos " in a shared object;"
3116 1.1.1.2 christos " typically an option mixup, recompile with -fPIC"),
3117 1.1.1.2 christos abfd,
3118 1.1 skrll sec,
3119 1.1.1.2 christos cris_elf_howto_table[r_type].name);
3120 1.1.1.2 christos /* Don't return FALSE here; we want messages for all of
3121 1.1.1.2 christos these and the error behavior is ungraceful
3122 1.1.1.2 christos anyway. */
3123 1.1.1.2 christos }
3124 1.1.1.2 christos default:
3125 1.1.1.2 christos break;
3126 1.1.1.2 christos }
3127 1.1.1.2 christos
3128 1.1 skrll switch (r_type)
3129 1.1.1.2 christos {
3130 1.1.1.2 christos case R_CRIS_32_GD:
3131 1.1.1.2 christos case R_CRIS_16_GOT_GD:
3132 1.1.1.2 christos case R_CRIS_32_GOT_GD:
3133 1.1.1.2 christos /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3134 1.1.1.2 christos got_element_size = 8;
3135 1.1.1.2 christos r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3136 1.1.1.2 christos break;
3137 1.1.1.2 christos
3138 1.1.1.2 christos case R_CRIS_16_DTPREL:
3139 1.1.1.2 christos case R_CRIS_32_DTPREL:
3140 1.1.1.2 christos /* These two just request for the constant-index
3141 1.1.1.2 christos module-local tls_index-sized GOT entry, which we add
3142 1.1.1.2 christos elsewhere. */
3143 1.1.1.2 christos break;
3144 1.1.1.4 christos
3145 1.1.1.2 christos case R_CRIS_32_IE:
3146 1.1 skrll case R_CRIS_32_GOT_TPREL:
3147 1.1 skrll case R_CRIS_16_GOT_TPREL:
3148 1.1.1.2 christos r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3149 1.1.1.2 christos
3150 1.1.1.2 christos /* Those relocs also require that a DSO is of type
3151 1.1.1.2 christos Initial Exec. Like other targets, we don't reset this
3152 1.1 skrll flag even if the relocs are GC:ed away. */
3153 1.1 skrll if (bfd_link_pic (info))
3154 1.1 skrll info->flags |= DF_STATIC_TLS;
3155 1.1 skrll break;
3156 1.1 skrll
3157 1.1.1.6 christos /* Let's list the other assembler-generated TLS-relocs too,
3158 1.1 skrll just to show that they're not forgotten. */
3159 1.1 skrll case R_CRIS_16_TPREL:
3160 1.1 skrll case R_CRIS_32_TPREL:
3161 1.1 skrll default:
3162 1.1 skrll break;
3163 1.1 skrll }
3164 1.1 skrll
3165 1.1.1.2 christos switch (r_type)
3166 1.1 skrll {
3167 1.1 skrll case R_CRIS_16_GOTPLT:
3168 1.1 skrll case R_CRIS_32_GOTPLT:
3169 1.1 skrll /* Mark that we need a GOT entry if the PLT entry (and its GOT
3170 1.1 skrll entry) is eliminated. We can only do this for a non-local
3171 1.1 skrll symbol. */
3172 1.1.1.2 christos if (h != NULL)
3173 1.1.1.2 christos {
3174 1.1.1.2 christos elf_cris_hash_entry (h)->gotplt_refcount++;
3175 1.1.1.2 christos goto handle_gotplt_reloc;
3176 1.1.1.2 christos }
3177 1.1.1.2 christos /* If h is NULL then this is a local symbol, and we must make a
3178 1.1 skrll GOT entry for it, so handle it like a GOT reloc. */
3179 1.1 skrll /* Fall through. */
3180 1.1 skrll
3181 1.1 skrll case R_CRIS_32_IE:
3182 1.1 skrll case R_CRIS_32_GD:
3183 1.1 skrll case R_CRIS_16_GOT_GD:
3184 1.1 skrll case R_CRIS_32_GOT_GD:
3185 1.1 skrll case R_CRIS_32_GOT_TPREL:
3186 1.1 skrll case R_CRIS_16_GOT_TPREL:
3187 1.1 skrll case R_CRIS_16_GOT:
3188 1.1 skrll case R_CRIS_32_GOT:
3189 1.1.1.9 christos /* This symbol requires a global offset table entry. */
3190 1.1 skrll if (h != NULL)
3191 1.1 skrll {
3192 1.1.1.2 christos if (h->got.refcount == 0)
3193 1.1.1.2 christos {
3194 1.1 skrll /* Make sure this symbol is output as a dynamic symbol. */
3195 1.1.1.2 christos if (h->dynindx == -1)
3196 1.1.1.2 christos {
3197 1.1.1.2 christos if (!bfd_elf_link_record_dynamic_symbol (info, h))
3198 1.1.1.2 christos return false;
3199 1.1.1.2 christos }
3200 1.1.1.2 christos }
3201 1.1.1.2 christos
3202 1.1.1.2 christos /* Update the sum of reloc counts for this symbol. */
3203 1.1.1.2 christos h->got.refcount++;
3204 1.1.1.2 christos
3205 1.1.1.2 christos switch (r_type)
3206 1.1.1.2 christos {
3207 1.1.1.2 christos case R_CRIS_16_GOT:
3208 1.1.1.2 christos case R_CRIS_32_GOT:
3209 1.1.1.2 christos if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3210 1.1.1.2 christos {
3211 1.1.1.2 christos /* Allocate space in the .got section. */
3212 1.1.1.2 christos sgot->size += got_element_size;
3213 1.1.1.2 christos /* Allocate relocation space. */
3214 1.1.1.2 christos srelgot->size += sizeof (Elf32_External_Rela);
3215 1.1.1.2 christos }
3216 1.1.1.2 christos elf_cris_hash_entry (h)->reg_got_refcount++;
3217 1.1.1.2 christos break;
3218 1.1.1.2 christos
3219 1.1.1.2 christos case R_CRIS_32_GD:
3220 1.1.1.2 christos case R_CRIS_16_GOT_GD:
3221 1.1.1.2 christos case R_CRIS_32_GOT_GD:
3222 1.1.1.2 christos if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3223 1.1.1.2 christos {
3224 1.1.1.2 christos /* Allocate space in the .got section. */
3225 1.1.1.2 christos sgot->size += got_element_size;
3226 1.1.1.2 christos /* Allocate relocation space. */
3227 1.1.1.2 christos srelgot->size += sizeof (Elf32_External_Rela);
3228 1.1.1.2 christos }
3229 1.1.1.2 christos elf_cris_hash_entry (h)->dtp_refcount++;
3230 1.1.1.2 christos break;
3231 1.1.1.2 christos
3232 1.1.1.2 christos case R_CRIS_32_IE:
3233 1.1.1.2 christos case R_CRIS_32_GOT_TPREL:
3234 1.1.1.2 christos case R_CRIS_16_GOT_TPREL:
3235 1.1.1.2 christos if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3236 1.1.1.2 christos {
3237 1.1.1.2 christos /* Allocate space in the .got section. */
3238 1.1.1.2 christos sgot->size += got_element_size;
3239 1.1.1.2 christos /* Allocate relocation space. */
3240 1.1 skrll srelgot->size += sizeof (Elf32_External_Rela);
3241 1.1 skrll }
3242 1.1 skrll elf_cris_hash_entry (h)->tprel_refcount++;
3243 1.1 skrll break;
3244 1.1.1.2 christos
3245 1.1 skrll default:
3246 1.1.1.2 christos BFD_FAIL ();
3247 1.1.1.4 christos break;
3248 1.1 skrll }
3249 1.1.1.2 christos }
3250 1.1.1.2 christos else
3251 1.1.1.2 christos {
3252 1.1.1.2 christos /* This is a global offset table entry for a local symbol. */
3253 1.1 skrll if (local_got_refcounts[r_symndx_lgot] == 0)
3254 1.1 skrll {
3255 1.1 skrll sgot->size += got_element_size;
3256 1.1.1.2 christos if (bfd_link_pic (info))
3257 1.1.1.2 christos {
3258 1.1.1.2 christos /* If we are generating a shared object, we need
3259 1.1.1.2 christos to output a R_CRIS_RELATIVE reloc so that the
3260 1.1 skrll dynamic linker can adjust this GOT entry.
3261 1.1 skrll Similarly for non-regular got entries. */
3262 1.1 skrll srelgot->size += sizeof (Elf32_External_Rela);
3263 1.1 skrll }
3264 1.1.1.2 christos }
3265 1.1.1.2 christos /* Update the reloc-specific count. */
3266 1.1 skrll local_got_refcounts[r_symndx_lgot]++;
3267 1.1 skrll
3268 1.1 skrll /* This one is the sum of all the others. */
3269 1.1 skrll local_got_refcounts[r_symndx]++;
3270 1.1 skrll }
3271 1.1 skrll break;
3272 1.1 skrll
3273 1.1 skrll case R_CRIS_16_DTPREL:
3274 1.1 skrll case R_CRIS_32_DTPREL:
3275 1.1 skrll case R_CRIS_32_GOTREL:
3276 1.1 skrll /* This reference requires a global offset table.
3277 1.1 skrll FIXME: The actual refcount isn't used currently; the .got
3278 1.1 skrll section can't be removed if there were any references in the
3279 1.1 skrll input. */
3280 1.1 skrll local_got_refcounts[-1]++;
3281 1.1 skrll break;
3282 1.1 skrll
3283 1.1 skrll handle_gotplt_reloc:
3284 1.1.1.6 christos
3285 1.1.1.6 christos case R_CRIS_32_PLT_GOTREL:
3286 1.1.1.6 christos /* This reference requires a global offset table. */
3287 1.1.1.6 christos local_got_refcounts[-1]++;
3288 1.1 skrll /* Fall through. */
3289 1.1 skrll
3290 1.1 skrll case R_CRIS_32_PLT_PCREL:
3291 1.1 skrll /* This symbol requires a procedure linkage table entry. We
3292 1.1 skrll actually build the entry in adjust_dynamic_symbol,
3293 1.1 skrll because this might be a case of linking PIC code which is
3294 1.1 skrll never referenced by a dynamic object, in which case we
3295 1.1 skrll don't need to generate a procedure linkage table entry
3296 1.1 skrll after all. */
3297 1.1 skrll
3298 1.1 skrll /* Beware: if we'd check for visibility of the symbol here
3299 1.1.1.6 christos (and not marking the need for a PLT when non-visible), we'd
3300 1.1.1.6 christos get into trouble with keeping handling consistent with
3301 1.1.1.6 christos regards to relocs found before definition and GOTPLT
3302 1.1.1.6 christos handling. Eliminable PLT entries will be dealt with later
3303 1.1 skrll anyway. */
3304 1.1 skrll if (h == NULL)
3305 1.1 skrll continue;
3306 1.1 skrll
3307 1.1 skrll h->needs_plt = 1;
3308 1.1 skrll
3309 1.1.1.2 christos /* If the symbol is forced local, the refcount is unavailable. */
3310 1.1.1.2 christos if (h->plt.refcount != -1)
3311 1.1.1.2 christos h->plt.refcount++;
3312 1.1.1.2 christos break;
3313 1.1.1.2 christos
3314 1.1.1.2 christos case R_CRIS_8:
3315 1.1.1.2 christos case R_CRIS_16:
3316 1.1.1.4 christos case R_CRIS_32:
3317 1.1 skrll /* Let's help debug shared library creation. Any of these
3318 1.1 skrll relocs *can* be used in shared libs, but pages containing
3319 1.1 skrll them cannot be shared, so they're not appropriate for
3320 1.1 skrll common use. Don't warn for sections we don't care about,
3321 1.1.1.6 christos such as debug sections or non-constant sections. We
3322 1.1.1.6 christos can't help tables of (global) function pointers, for
3323 1.1.1.7 christos example, though they must be emitted in a (writable) data
3324 1.1 skrll section to avoid having impure text sections. */
3325 1.1 skrll if (bfd_link_pic (info)
3326 1.1 skrll && (sec->flags & SEC_ALLOC) != 0
3327 1.1 skrll && (sec->flags & SEC_READONLY) != 0)
3328 1.1 skrll {
3329 1.1.1.3 christos /* FIXME: How do we make this optionally a warning only? */
3330 1.1.1.3 christos _bfd_error_handler
3331 1.1.1.3 christos /* xgettext:c-format */
3332 1.1.1.3 christos (_("%pB, section %pA: relocation %s should not"
3333 1.1.1.3 christos " be used in a shared object; recompile with -fPIC"),
3334 1.1.1.3 christos abfd,
3335 1.1.1.2 christos sec,
3336 1.1.1.2 christos cris_elf_howto_table[r_type].name);
3337 1.1.1.2 christos }
3338 1.1.1.2 christos
3339 1.1.1.2 christos /* We don't need to handle relocs into sections not going into
3340 1.1.1.2 christos the "real" output. */
3341 1.1.1.2 christos if ((sec->flags & SEC_ALLOC) == 0)
3342 1.1.1.2 christos break;
3343 1.1.1.2 christos
3344 1.1.1.2 christos if (h != NULL)
3345 1.1.1.2 christos {
3346 1.1.1.2 christos h->non_got_ref = 1;
3347 1.1.1.2 christos
3348 1.1.1.2 christos /* Make sure a plt entry is created for this symbol if it
3349 1.1.1.2 christos turns out to be a function defined by a dynamic object. */
3350 1.1.1.2 christos if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3351 1.1.1.2 christos h->plt.refcount++;
3352 1.1.1.2 christos }
3353 1.1.1.2 christos
3354 1.1.1.2 christos /* If we are creating a shared library and this is not a local
3355 1.1.1.2 christos symbol, we need to copy the reloc into the shared library.
3356 1.1.1.2 christos However when linking with -Bsymbolic and this is a global
3357 1.1.1.2 christos symbol which is defined in an object we are including in the
3358 1.1.1.2 christos link (i.e., DEF_REGULAR is set), then we can resolve the
3359 1.1.1.2 christos reloc directly. At this point we have not seen all the input
3360 1.1.1.2 christos files, so it is possible that DEF_REGULAR is not set now but
3361 1.1.1.6 christos will be set later (it is never cleared). In case of a weak
3362 1.1.1.9 christos definition, DEF_REGULAR may be cleared later by a strong
3363 1.1.1.2 christos definition in a shared library. We account for that
3364 1.1.1.2 christos possibility below by storing information in the relocs_copied
3365 1.1.1.2 christos field of the hash table entry. A similar situation occurs
3366 1.1.1.2 christos when creating shared libraries and symbol visibility changes
3367 1.1.1.2 christos render the symbol local. */
3368 1.1.1.2 christos
3369 1.1.1.2 christos /* No need to do anything if we're not creating a shared object. */
3370 1.1.1.9 christos if (! bfd_link_pic (info)
3371 1.1.1.2 christos || (h != NULL && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
3372 1.1.1.2 christos break;
3373 1.1.1.9 christos
3374 1.1.1.2 christos /* We may need to create a reloc section in the dynobj and made room
3375 1.1.1.2 christos for this reloc. */
3376 1.1.1.2 christos if (sreloc == NULL)
3377 1.1.1.2 christos {
3378 1.1.1.2 christos sreloc = _bfd_elf_make_dynamic_reloc_section
3379 1.1.1.2 christos (sec, dynobj, 2, abfd, /*rela?*/ true);
3380 1.1.1.2 christos
3381 1.1 skrll if (sreloc == NULL)
3382 1.1 skrll return false;
3383 1.1 skrll }
3384 1.1 skrll
3385 1.1 skrll if (sec->flags & SEC_READONLY)
3386 1.1 skrll info->flags |= DF_TEXTREL;
3387 1.1 skrll
3388 1.1 skrll sreloc->size += sizeof (Elf32_External_Rela);
3389 1.1 skrll break;
3390 1.1 skrll
3391 1.1 skrll case R_CRIS_8_PCREL:
3392 1.1 skrll case R_CRIS_16_PCREL:
3393 1.1 skrll case R_CRIS_32_PCREL:
3394 1.1 skrll if (h != NULL)
3395 1.1 skrll {
3396 1.1 skrll h->non_got_ref = 1;
3397 1.1 skrll
3398 1.1 skrll /* Make sure a plt entry is created for this symbol if it
3399 1.1 skrll turns out to be a function defined by a dynamic object. */
3400 1.1 skrll if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3401 1.1 skrll h->plt.refcount++;
3402 1.1 skrll }
3403 1.1 skrll
3404 1.1 skrll /* If we are creating a shared library and this is not a local
3405 1.1 skrll symbol, we need to copy the reloc into the shared library.
3406 1.1 skrll However when linking with -Bsymbolic and this is a global
3407 1.1 skrll symbol which is defined in an object we are including in the
3408 1.1 skrll link (i.e., DEF_REGULAR is set), then we can resolve the
3409 1.1 skrll reloc directly. At this point we have not seen all the input
3410 1.1 skrll files, so it is possible that DEF_REGULAR is not set now but
3411 1.1.1.4 christos will be set later (it is never cleared). In case of a weak
3412 1.1 skrll definition, DEF_REGULAR may be cleared later by a strong
3413 1.1 skrll definition in a shared library. We account for that
3414 1.1 skrll possibility below by storing information in the relocs_copied
3415 1.1 skrll field of the hash table entry. A similar situation occurs
3416 1.1 skrll when creating shared libraries and symbol visibility changes
3417 1.1 skrll render the symbol local. */
3418 1.1 skrll
3419 1.1.1.2 christos /* No need to do anything if we're not creating a shared object. */
3420 1.1.1.2 christos if (! bfd_link_pic (info))
3421 1.1.1.2 christos break;
3422 1.1.1.2 christos
3423 1.1 skrll /* We don't need to handle relocs into sections not going into
3424 1.1.1.2 christos the "real" output. */
3425 1.1.1.2 christos if ((sec->flags & SEC_ALLOC) == 0)
3426 1.1.1.2 christos break;
3427 1.1.1.2 christos
3428 1.1.1.2 christos /* If the symbol is local, then we know already we can
3429 1.1.1.4 christos eliminate the reloc. */
3430 1.1.1.2 christos if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3431 1.1.1.2 christos break;
3432 1.1.1.2 christos
3433 1.1 skrll /* If this is with -Bsymbolic and the symbol isn't weak, and
3434 1.1.1.2 christos is defined by an ordinary object (the ones we include in
3435 1.1.1.2 christos this shared library) then we can also eliminate the
3436 1.1 skrll reloc. See comment above for more eliminable cases which
3437 1.1 skrll we can't identify at this time. */
3438 1.1.1.2 christos if (SYMBOLIC_BIND (info, h)
3439 1.1.1.9 christos && h->root.type != bfd_link_hash_defweak
3440 1.1 skrll && h->def_regular)
3441 1.1 skrll break;
3442 1.1.1.9 christos
3443 1.1 skrll /* We may need to create a reloc section in the dynobj and made room
3444 1.1 skrll for this reloc. */
3445 1.1 skrll if (sreloc == NULL)
3446 1.1 skrll {
3447 1.1.1.2 christos sreloc = _bfd_elf_make_dynamic_reloc_section
3448 1.1.1.2 christos (sec, dynobj, 2, abfd, /*rela?*/ true);
3449 1.1.1.2 christos
3450 1.1.1.2 christos if (sreloc == NULL)
3451 1.1 skrll return false;
3452 1.1.1.2 christos }
3453 1.1.1.2 christos
3454 1.1.1.2 christos sreloc->size += sizeof (Elf32_External_Rela);
3455 1.1 skrll
3456 1.1.1.2 christos /* We count the number of PC relative relocations we have
3457 1.1 skrll entered for this symbol, so that we can discard them
3458 1.1.1.2 christos again if the symbol is later defined by a regular object.
3459 1.1.1.2 christos We know that h is really a pointer to an
3460 1.1.1.2 christos elf_cris_link_hash_entry. */
3461 1.1 skrll {
3462 1.1.1.2 christos struct elf_cris_link_hash_entry *eh;
3463 1.1.1.2 christos struct elf_cris_pcrel_relocs_copied *p;
3464 1.1.1.2 christos
3465 1.1.1.2 christos eh = elf_cris_hash_entry (h);
3466 1.1.1.2 christos
3467 1.1.1.9 christos for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3468 1.1.1.2 christos if (p->section == sec)
3469 1.1.1.2 christos break;
3470 1.1.1.2 christos
3471 1.1.1.2 christos if (p == NULL)
3472 1.1.1.2 christos {
3473 1.1.1.2 christos p = ((struct elf_cris_pcrel_relocs_copied *)
3474 1.1 skrll bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3475 1.1.1.2 christos if (p == NULL)
3476 1.1.1.2 christos return false;
3477 1.1 skrll p->next = eh->pcrel_relocs_copied;
3478 1.1 skrll eh->pcrel_relocs_copied = p;
3479 1.1.1.6 christos p->section = sec;
3480 1.1.1.6 christos p->count = 0;
3481 1.1.1.6 christos p->r_type = r_type;
3482 1.1.1.6 christos }
3483 1.1.1.9 christos
3484 1.1.1.6 christos ++p->count;
3485 1.1.1.6 christos }
3486 1.1.1.6 christos break;
3487 1.1.1.6 christos
3488 1.1.1.6 christos /* This relocation describes the C++ object vtable hierarchy.
3489 1.1.1.8 christos Reconstruct it for later use during GC. */
3490 1.1.1.9 christos case R_CRIS_GNU_VTINHERIT:
3491 1.1.1.6 christos if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3492 1.1 skrll return false;
3493 1.1.1.2 christos break;
3494 1.1.1.2 christos
3495 1.1.1.2 christos /* This relocation describes which C++ vtable entries are actually
3496 1.1.1.2 christos used. Record for later use during GC. */
3497 1.1.1.2 christos case R_CRIS_GNU_VTENTRY:
3498 1.1 skrll if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3499 1.1 skrll return false;
3500 1.1 skrll break;
3501 1.1.1.9 christos
3502 1.1.1.6 christos case R_CRIS_16_TPREL:
3503 1.1 skrll case R_CRIS_32_TPREL:
3504 1.1 skrll /* Already warned above, when necessary. */
3505 1.1.1.9 christos break;
3506 1.1 skrll
3507 1.1 skrll default:
3508 1.1 skrll /* Other relocs do not appear here. */
3509 1.1 skrll bfd_set_error (bfd_error_bad_value);
3510 1.1.1.9 christos return false;
3511 1.1.1.2 christos }
3512 1.1.1.2 christos }
3513 1.1 skrll
3514 1.1.1.2 christos return true;
3515 1.1 skrll }
3516 1.1 skrll
3517 1.1.1.9 christos /* Set the sizes of the dynamic sections. */
3518 1.1 skrll
3519 1.1.1.2 christos static bool
3520 1.1.1.2 christos elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3521 1.1.1.9 christos struct bfd_link_info *info)
3522 1.1.1.2 christos {
3523 1.1.1.6 christos struct elf_cris_link_hash_table * htab;
3524 1.1 skrll bfd *dynobj;
3525 1.1 skrll asection *s;
3526 1.1.1.6 christos bool relocs;
3527 1.1 skrll
3528 1.1 skrll htab = elf_cris_hash_table (info);
3529 1.1.1.4 christos if (htab == NULL)
3530 1.1 skrll return false;
3531 1.1.1.3 christos
3532 1.1 skrll dynobj = htab->root.dynobj;
3533 1.1 skrll BFD_ASSERT (dynobj != NULL);
3534 1.1 skrll
3535 1.1 skrll if (htab->root.dynamic_sections_created)
3536 1.1 skrll {
3537 1.1 skrll /* Set the contents of the .interp section to the interpreter. */
3538 1.1 skrll if (bfd_link_executable (info) && !info->nointerp)
3539 1.1 skrll {
3540 1.1.1.2 christos s = bfd_get_linker_section (dynobj, ".interp");
3541 1.1.1.2 christos BFD_ASSERT (s != NULL);
3542 1.1 skrll s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3543 1.1 skrll s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3544 1.1 skrll }
3545 1.1 skrll }
3546 1.1 skrll else
3547 1.1 skrll {
3548 1.1.1.6 christos /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3549 1.1 skrll elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3550 1.1 skrll info);
3551 1.1 skrll
3552 1.1 skrll /* We may have created entries in the .rela.got section.
3553 1.1 skrll However, if we are not creating the dynamic sections, we will
3554 1.1 skrll not actually use these entries. Reset the size of .rela.got,
3555 1.1 skrll which will cause it to get stripped from the output file
3556 1.1 skrll below. */
3557 1.1 skrll s = htab->root.srelgot;
3558 1.1 skrll if (s != NULL)
3559 1.1 skrll s->size = 0;
3560 1.1.1.4 christos }
3561 1.1.1.2 christos
3562 1.1 skrll /* If this is a -Bsymbolic shared link, then we need to discard all PC
3563 1.1.1.2 christos relative relocs against symbols defined in a regular object. We
3564 1.1 skrll allocated space for them in the check_relocs routine, but we will not
3565 1.1.1.2 christos fill them in in the relocate_section routine. We also discard space
3566 1.1 skrll for relocs that have become for local symbols due to symbol
3567 1.1.1.2 christos visibility changes. For programs, we discard space for relocs for
3568 1.1 skrll symbols not referenced by any dynamic object. */
3569 1.1 skrll if (bfd_link_pic (info))
3570 1.1 skrll elf_cris_link_hash_traverse (htab,
3571 1.1 skrll elf_cris_discard_excess_dso_dynamics,
3572 1.1.1.9 christos info);
3573 1.1 skrll else
3574 1.1 skrll elf_cris_link_hash_traverse (htab,
3575 1.1 skrll elf_cris_discard_excess_program_dynamics,
3576 1.1 skrll info);
3577 1.1 skrll
3578 1.1 skrll /* The check_relocs and adjust_dynamic_symbol entry points have
3579 1.1 skrll determined the sizes of the various dynamic sections. Allocate
3580 1.1 skrll memory for them. */
3581 1.1 skrll relocs = false;
3582 1.1.1.8 christos for (s = dynobj->sections; s != NULL; s = s->next)
3583 1.1 skrll {
3584 1.1 skrll const char *name;
3585 1.1 skrll
3586 1.1.1.9 christos if ((s->flags & SEC_LINKER_CREATED) == 0)
3587 1.1 skrll continue;
3588 1.1.1.2 christos
3589 1.1.1.2 christos /* It's OK to base decisions on the section name, because none
3590 1.1.1.2 christos of the dynobj section names depend upon the input files. */
3591 1.1.1.2 christos name = bfd_section_name (s);
3592 1.1.1.2 christos
3593 1.1.1.2 christos if (strcmp (name, ".plt") == 0)
3594 1.1.1.2 christos {
3595 1.1.1.2 christos ;
3596 1.1.1.9 christos }
3597 1.1 skrll else if (strcmp (name, ".got.plt") == 0)
3598 1.1.1.2 christos {
3599 1.1.1.2 christos /* The .got.plt contains the .got header as well as the
3600 1.1.1.4 christos actual .got.plt contents. The .got header may contain a
3601 1.1.1.2 christos R_CRIS_DTPMOD entry at index 3. */
3602 1.1.1.2 christos s->size += htab->dtpmod_refcount != 0
3603 1.1 skrll ? 8 : 0;
3604 1.1 skrll }
3605 1.1 skrll else if (startswith (name, ".rela"))
3606 1.1.1.6 christos {
3607 1.1 skrll if (strcmp (name, ".rela.got") == 0
3608 1.1.1.9 christos && htab->dtpmod_refcount != 0
3609 1.1 skrll && bfd_link_pic (info))
3610 1.1 skrll s->size += sizeof (Elf32_External_Rela);
3611 1.1 skrll
3612 1.1 skrll if (s->size != 0)
3613 1.1 skrll {
3614 1.1 skrll /* Remember whether there are any reloc sections other
3615 1.1.1.9 christos than .rela.plt. */
3616 1.1.1.6 christos if (strcmp (name, ".rela.plt") != 0)
3617 1.1.1.6 christos relocs = true;
3618 1.1 skrll
3619 1.1 skrll /* We use the reloc_count field as a counter if we need
3620 1.1 skrll to copy relocs into the output file. */
3621 1.1 skrll s->reloc_count = 0;
3622 1.1 skrll }
3623 1.1 skrll }
3624 1.1 skrll else if (! startswith (name, ".got")
3625 1.1 skrll && strcmp (name, ".dynbss") != 0
3626 1.1 skrll && s != htab->root.sdynrelro)
3627 1.1 skrll {
3628 1.1 skrll /* It's not one of our sections, so don't allocate space. */
3629 1.1 skrll continue;
3630 1.1 skrll }
3631 1.1 skrll
3632 1.1 skrll if (s->size == 0)
3633 1.1 skrll {
3634 1.1 skrll /* If we don't need this section, strip it from the
3635 1.1 skrll output file. This is mostly to handle .rela.bss and
3636 1.1 skrll .rela.plt. We must create both sections in
3637 1.1 skrll create_dynamic_sections, because they must be created
3638 1.1 skrll before the linker maps input sections to output
3639 1.1 skrll sections. The linker does that before
3640 1.1 skrll adjust_dynamic_symbol is called, and it is that
3641 1.1 skrll function which decides whether anything needs to go
3642 1.1 skrll into these sections. */
3643 1.1 skrll s->flags |= SEC_EXCLUDE;
3644 1.1 skrll continue;
3645 1.1 skrll }
3646 1.1 skrll
3647 1.1 skrll if ((s->flags & SEC_HAS_CONTENTS) == 0)
3648 1.1.1.9 christos continue;
3649 1.1 skrll
3650 1.1 skrll /* Allocate memory for the section contents. We use bfd_zalloc here
3651 1.1.1.9 christos in case unused entries are not reclaimed before the section's
3652 1.1 skrll contents are written out. This should not happen, but this way
3653 1.1 skrll if it does, we will not write out garbage. For reloc sections,
3654 1.1 skrll this will make entries have the type R_CRIS_NONE. */
3655 1.1 skrll s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3656 1.1 skrll if (s->contents == NULL)
3657 1.1 skrll return false;
3658 1.1 skrll }
3659 1.1 skrll
3660 1.1 skrll return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
3661 1.1 skrll }
3662 1.1 skrll
3663 1.1.1.9 christos /* This function is called via elf_cris_link_hash_traverse if we are
3664 1.1.1.3 christos creating a shared object. In the -Bsymbolic case, it discards the
3665 1.1.1.3 christos space allocated to copy PC relative relocs against symbols which
3666 1.1 skrll are defined in regular objects. For the normal non-symbolic case,
3667 1.1 skrll we also discard space for relocs that have become local due to
3668 1.1 skrll symbol visibility changes. We allocated space for them in the
3669 1.1 skrll check_relocs routine, but we won't fill them in in the
3670 1.1 skrll relocate_section routine. */
3671 1.1 skrll
3672 1.1 skrll static bool
3673 1.1 skrll elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3674 1.1 skrll void * inf)
3675 1.1.1.4 christos {
3676 1.1 skrll struct elf_cris_pcrel_relocs_copied *s;
3677 1.1 skrll struct bfd_link_info *info = (struct bfd_link_info *) inf;
3678 1.1.1.2 christos
3679 1.1.1.2 christos /* If a symbol has been forced local or we have found a regular
3680 1.1.1.2 christos definition for the symbolic link case, then we won't be needing
3681 1.1.1.2 christos any relocs. */
3682 1.1.1.2 christos if (h->root.def_regular
3683 1.1.1.9 christos && (h->root.forced_local
3684 1.1.1.2 christos || SYMBOLIC_BIND (info, &h->root)))
3685 1.1.1.2 christos {
3686 1.1.1.9 christos for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3687 1.1 skrll {
3688 1.1 skrll asection *sreloc
3689 1.1.1.2 christos = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3690 1.1.1.2 christos ->dynobj,
3691 1.1.1.2 christos s->section,
3692 1.1.1.2 christos /*rela?*/ true);
3693 1.1.1.2 christos sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3694 1.1.1.2 christos }
3695 1.1.1.2 christos return true;
3696 1.1.1.2 christos }
3697 1.1.1.2 christos
3698 1.1.1.2 christos /* If we have accounted for PC-relative relocs for read-only
3699 1.1.1.6 christos sections, now is the time to warn for them. We can't do it in
3700 1.1.1.6 christos cris_elf_check_relocs, because we don't know the status of all
3701 1.1.1.7 christos symbols at that time (and it's common to force symbols local
3702 1.1.1.7 christos late). */
3703 1.1.1.2 christos
3704 1.1.1.2 christos for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3705 1.1.1.2 christos if ((s->section->flags & SEC_READONLY) != 0)
3706 1.1.1.2 christos {
3707 1.1.1.2 christos /* FIXME: How do we make this optionally a warning only? */
3708 1.1.1.2 christos _bfd_error_handler
3709 1.1.1.2 christos /* xgettext:c-format */
3710 1.1.1.2 christos (_("%pB, section `%pA', to symbol `%s':"
3711 1.1.1.2 christos " relocation %s should not be used"
3712 1.1.1.9 christos " in a shared object; recompile with -fPIC"),
3713 1.1 skrll s->section->owner,
3714 1.1 skrll s->section,
3715 1.1 skrll h->root.root.root.string,
3716 1.1 skrll cris_elf_howto_table[s->r_type].name);
3717 1.1 skrll
3718 1.1 skrll info->flags |= DF_TEXTREL;
3719 1.1.1.9 christos }
3720 1.1.1.3 christos
3721 1.1.1.3 christos return true;
3722 1.1 skrll }
3723 1.1 skrll
3724 1.1 skrll /* This function is called via elf_cris_link_hash_traverse if we are *not*
3725 1.1 skrll creating a shared object. We discard space for relocs for symbols put
3726 1.1 skrll in the .got, but which we found we do not have to resolve at run-time. */
3727 1.1 skrll
3728 1.1 skrll static bool
3729 1.1 skrll elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
3730 1.1 skrll void * inf)
3731 1.1 skrll {
3732 1.1 skrll struct bfd_link_info *info = (struct bfd_link_info *) inf;
3733 1.1.1.2 christos
3734 1.1 skrll /* If we're not creating a shared library and have a symbol which is
3735 1.1 skrll referred to by .got references, but the symbol is defined locally,
3736 1.1 skrll (or rather, not defined by a DSO) then lose the reloc for the .got
3737 1.1 skrll (don't allocate room for it). Likewise for relocs for something
3738 1.1 skrll for which we create a PLT. */
3739 1.1 skrll if (!h->root.def_dynamic
3740 1.1.1.6 christos || h->root.plt.refcount > 0)
3741 1.1 skrll {
3742 1.1 skrll if (h->reg_got_refcount > 0
3743 1.1 skrll /* The size of this section is only valid and in sync with the
3744 1.1 skrll various reference counts if we do dynamic; don't decrement it
3745 1.1 skrll otherwise. */
3746 1.1 skrll && elf_hash_table (info)->dynamic_sections_created)
3747 1.1 skrll {
3748 1.1 skrll bfd *dynobj = elf_hash_table (info)->dynobj;
3749 1.1 skrll asection *srelgot = elf_hash_table (info)->srelgot;
3750 1.1 skrll
3751 1.1 skrll BFD_ASSERT (dynobj != NULL);
3752 1.1.1.5 christos BFD_ASSERT (srelgot != NULL);
3753 1.1.1.5 christos
3754 1.1.1.5 christos srelgot->size -= sizeof (Elf32_External_Rela);
3755 1.1.1.5 christos }
3756 1.1 skrll
3757 1.1.1.6 christos /* If the locally-defined symbol isn't used by a DSO, then we don't
3758 1.1 skrll have to export it as a dynamic symbol. This was already done for
3759 1.1 skrll functions; doing this for all symbols would presumably not
3760 1.1 skrll introduce new problems. Of course we don't do this if we're
3761 1.1 skrll exporting all dynamic symbols, or all data symbols, regardless of
3762 1.1 skrll them being referenced or not. */
3763 1.1 skrll if (! (info->export_dynamic
3764 1.1 skrll || (h->root.type != STT_FUNC && info->dynamic_data))
3765 1.1 skrll && h->root.dynindx != -1
3766 1.1 skrll && !h->root.dynamic
3767 1.1.1.9 christos && !h->root.def_dynamic
3768 1.1 skrll && !h->root.ref_dynamic)
3769 1.1 skrll {
3770 1.1 skrll h->root.dynindx = -1;
3771 1.1 skrll _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3772 1.1 skrll h->root.dynstr_index);
3773 1.1.1.9 christos }
3774 1.1.1.3 christos }
3775 1.1 skrll
3776 1.1 skrll return true;
3777 1.1.1.9 christos }
3778 1.1 skrll
3779 1.1 skrll /* Reject a file depending on presence and expectation of prefixed
3780 1.1 skrll underscores on symbols. */
3781 1.1 skrll
3782 1.1 skrll static bool
3783 1.1 skrll cris_elf_object_p (bfd *abfd)
3784 1.1 skrll {
3785 1.1 skrll if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3786 1.1 skrll return false;
3787 1.1 skrll
3788 1.1.1.9 christos if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3789 1.1.1.8 christos return (bfd_get_symbol_leading_char (abfd) == '_');
3790 1.1 skrll else
3791 1.1 skrll return (bfd_get_symbol_leading_char (abfd) == 0);
3792 1.1 skrll }
3793 1.1 skrll
3794 1.1 skrll /* Mark presence or absence of leading underscore. Set machine type
3795 1.1 skrll flags from mach type. */
3796 1.1 skrll
3797 1.1 skrll static bool
3798 1.1 skrll cris_elf_final_write_processing (bfd *abfd)
3799 1.1 skrll {
3800 1.1 skrll unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3801 1.1 skrll
3802 1.1 skrll e_flags &= ~EF_CRIS_UNDERSCORE;
3803 1.1 skrll if (bfd_get_symbol_leading_char (abfd) == '_')
3804 1.1 skrll e_flags |= EF_CRIS_UNDERSCORE;
3805 1.1 skrll
3806 1.1 skrll switch (bfd_get_mach (abfd))
3807 1.1 skrll {
3808 1.1 skrll case bfd_mach_cris_v0_v10:
3809 1.1 skrll e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3810 1.1 skrll break;
3811 1.1 skrll
3812 1.1 skrll case bfd_mach_cris_v10_v32:
3813 1.1.1.7 christos e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3814 1.1 skrll break;
3815 1.1 skrll
3816 1.1 skrll case bfd_mach_cris_v32:
3817 1.1.1.8 christos e_flags |= EF_CRIS_VARIANT_V32;
3818 1.1 skrll break;
3819 1.1 skrll
3820 1.1 skrll default:
3821 1.1 skrll _bfd_abort (__FILE__, __LINE__,
3822 1.1.1.9 christos _("unexpected machine number"));
3823 1.1.1.3 christos }
3824 1.1.1.3 christos
3825 1.1 skrll elf_elfheader (abfd)->e_flags = e_flags;
3826 1.1 skrll return _bfd_elf_final_write_processing (abfd);
3827 1.1 skrll }
3828 1.1 skrll
3829 1.1 skrll /* Set the mach type from e_flags value. */
3830 1.1 skrll
3831 1.1 skrll static bool
3832 1.1 skrll cris_elf_set_mach_from_flags (bfd *abfd,
3833 1.1 skrll unsigned long flags)
3834 1.1 skrll {
3835 1.1 skrll switch (flags & EF_CRIS_VARIANT_MASK)
3836 1.1 skrll {
3837 1.1 skrll case EF_CRIS_VARIANT_ANY_V0_V10:
3838 1.1 skrll bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3839 1.1 skrll break;
3840 1.1 skrll
3841 1.1 skrll case EF_CRIS_VARIANT_V32:
3842 1.1 skrll bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3843 1.1 skrll break;
3844 1.1 skrll
3845 1.1.1.9 christos case EF_CRIS_VARIANT_COMMON_V10_V32:
3846 1.1 skrll bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3847 1.1 skrll break;
3848 1.1.1.9 christos
3849 1.1 skrll default:
3850 1.1 skrll /* Since we don't recognize them, we obviously can't support them
3851 1.1 skrll with this code; we'd have to require that all future handling
3852 1.1 skrll would be optional. */
3853 1.1.1.9 christos bfd_set_error (bfd_error_wrong_format);
3854 1.1.1.3 christos return false;
3855 1.1 skrll }
3856 1.1 skrll
3857 1.1 skrll return true;
3858 1.1 skrll }
3859 1.1 skrll
3860 1.1 skrll /* Display the flags field. */
3861 1.1 skrll
3862 1.1 skrll static bool
3863 1.1 skrll cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
3864 1.1 skrll {
3865 1.1 skrll FILE *file = (FILE *) ptr;
3866 1.1 skrll
3867 1.1 skrll BFD_ASSERT (abfd != NULL && ptr != NULL);
3868 1.1 skrll
3869 1.1 skrll _bfd_elf_print_private_bfd_data (abfd, ptr);
3870 1.1 skrll
3871 1.1 skrll fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3872 1.1 skrll
3873 1.1 skrll if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3874 1.1.1.9 christos fprintf (file, _(" [symbols have a _ prefix]"));
3875 1.1 skrll if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3876 1.1 skrll == EF_CRIS_VARIANT_COMMON_V10_V32)
3877 1.1 skrll fprintf (file, _(" [v10 and v32]"));
3878 1.1 skrll if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3879 1.1.1.9 christos == EF_CRIS_VARIANT_V32)
3880 1.1.1.6 christos fprintf (file, _(" [v32]"));
3881 1.1 skrll
3882 1.1.1.6 christos fputc ('\n', file);
3883 1.1 skrll return true;
3884 1.1 skrll }
3885 1.1.1.6 christos
3886 1.1.1.9 christos /* Don't mix files with and without a leading underscore. */
3887 1.1 skrll
3888 1.1 skrll static bool
3889 1.1 skrll cris_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3890 1.1.1.9 christos {
3891 1.1 skrll bfd *obfd = info->output_bfd;
3892 1.1 skrll int imach, omach;
3893 1.1 skrll
3894 1.1 skrll if (! _bfd_generic_verify_endian_match (ibfd, info))
3895 1.1 skrll return false;
3896 1.1 skrll
3897 1.1.1.9 christos if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3898 1.1 skrll || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3899 1.1 skrll return true;
3900 1.1 skrll
3901 1.1 skrll imach = bfd_get_mach (ibfd);
3902 1.1 skrll
3903 1.1 skrll if (! elf_flags_init (obfd))
3904 1.1 skrll {
3905 1.1 skrll /* This happens when ld starts out with a 'blank' output file. */
3906 1.1 skrll elf_flags_init (obfd) = true;
3907 1.1.1.9 christos
3908 1.1 skrll /* We ignore the linker-set mach, and instead set it according to
3909 1.1 skrll the first input file. This would also happen if we could
3910 1.1 skrll somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3911 1.1 skrll This allows us to keep the same linker config across
3912 1.1 skrll cris(v0..v10) and crisv32. The drawback is that we can't force
3913 1.1.1.6 christos the output type, which might be a sane thing to do for a
3914 1.1 skrll v10+v32 compatibility object. */
3915 1.1.1.7 christos if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3916 1.1.1.7 christos return false;
3917 1.1 skrll }
3918 1.1 skrll
3919 1.1.1.9 christos if (bfd_get_symbol_leading_char (ibfd)
3920 1.1 skrll != bfd_get_symbol_leading_char (obfd))
3921 1.1 skrll {
3922 1.1 skrll _bfd_error_handler
3923 1.1 skrll (bfd_get_symbol_leading_char (ibfd) == '_'
3924 1.1 skrll ? _("%pB: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3925 1.1 skrll : _("%pB: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3926 1.1 skrll ibfd);
3927 1.1 skrll bfd_set_error (bfd_error_bad_value);
3928 1.1 skrll return false;
3929 1.1 skrll }
3930 1.1 skrll
3931 1.1 skrll omach = bfd_get_mach (obfd);
3932 1.1 skrll
3933 1.1.1.6 christos if (imach != omach)
3934 1.1 skrll {
3935 1.1.1.7 christos /* We can get an incompatible combination only if either is
3936 1.1 skrll bfd_mach_cris_v32, and the other one isn't compatible. */
3937 1.1.1.7 christos if ((imach == bfd_mach_cris_v32
3938 1.1 skrll && omach != bfd_mach_cris_v10_v32)
3939 1.1 skrll || (omach == bfd_mach_cris_v32
3940 1.1 skrll && imach != bfd_mach_cris_v10_v32))
3941 1.1.1.9 christos {
3942 1.1 skrll _bfd_error_handler
3943 1.1 skrll ((imach == bfd_mach_cris_v32)
3944 1.1 skrll ? _("%pB contains CRIS v32 code, incompatible"
3945 1.1 skrll " with previous objects")
3946 1.1 skrll : _("%pB contains non-CRIS-v32 code, incompatible"
3947 1.1 skrll " with previous objects"),
3948 1.1 skrll ibfd);
3949 1.1.1.9 christos bfd_set_error (bfd_error_bad_value);
3950 1.1 skrll return false;
3951 1.1 skrll }
3952 1.1.1.9 christos
3953 1.1 skrll /* We don't have to check the case where the input is compatible
3954 1.1 skrll with v10 and v32, because the output is already known to be set
3955 1.1 skrll to the other (compatible) mach. */
3956 1.1 skrll if (omach == bfd_mach_cris_v10_v32
3957 1.1.1.9 christos && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3958 1.1.1.3 christos return false;
3959 1.1 skrll }
3960 1.1 skrll
3961 1.1 skrll return true;
3962 1.1.1.9 christos }
3963 1.1 skrll
3964 1.1.1.6 christos /* Do side-effects of e_flags copying to obfd. */
3965 1.1.1.6 christos
3966 1.1.1.9 christos static bool
3967 1.1.1.6 christos cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3968 1.1 skrll {
3969 1.1 skrll if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3970 1.1 skrll || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3971 1.1 skrll return true;
3972 1.1 skrll
3973 1.1.1.4 christos /* Call the base function. */
3974 1.1.1.4 christos if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3975 1.1.1.4 christos return false;
3976 1.1 skrll
3977 1.1.1.2 christos /* Do what we really came here for. */
3978 1.1.1.2 christos return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3979 1.1 skrll }
3980 1.1 skrll
3981 1.1 skrll static enum elf_reloc_type_class
3982 1.1 skrll elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3983 1.1 skrll const asection *rel_sec ATTRIBUTE_UNUSED,
3984 1.1 skrll const Elf_Internal_Rela *rela)
3985 1.1 skrll {
3986 1.1 skrll enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
3987 1.1 skrll switch (r_type)
3988 1.1 skrll {
3989 1.1 skrll case R_CRIS_RELATIVE:
3990 1.1.1.2 christos return reloc_class_relative;
3991 1.1.1.2 christos case R_CRIS_JUMP_SLOT:
3992 1.1.1.2 christos return reloc_class_plt;
3993 1.1.1.2 christos case R_CRIS_COPY:
3994 1.1.1.2 christos return reloc_class_copy;
3995 1.1.1.2 christos default:
3996 1.1.1.2 christos return reloc_class_normal;
3997 1.1.1.2 christos }
3998 1.1.1.2 christos }
3999 1.1.1.2 christos
4000 1.1.1.2 christos /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4001 1.1.1.2 christos two GOT entries from three types with two different sizes. We handle
4002 1.1.1.2 christos it as a single entry, so we can use the regular offset-calculation
4003 1.1.1.2 christos machinery. */
4004 1.1.1.2 christos
4005 1.1.1.2 christos static bfd_vma
4006 1.1.1.2 christos elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4007 1.1.1.2 christos struct bfd_link_info *info ATTRIBUTE_UNUSED,
4008 1.1.1.2 christos struct elf_link_hash_entry *hr,
4009 1.1.1.2 christos bfd *ibfd,
4010 1.1.1.2 christos unsigned long symndx)
4011 1.1.1.2 christos {
4012 1.1.1.2 christos struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4013 1.1.1.2 christos bfd_vma eltsiz = 0;
4014 1.1.1.2 christos
4015 1.1.1.2 christos /* We may have one regular GOT entry or up to two TLS GOT
4016 1.1.1.2 christos entries. */
4017 1.1.1.2 christos if (h == NULL)
4018 1.1.1.2 christos {
4019 1.1.1.2 christos Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4020 1.1.1.2 christos bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4021 1.1.1.2 christos
4022 1.1.1.2 christos BFD_ASSERT (local_got_refcounts != NULL);
4023 1.1.1.2 christos
4024 1.1.1.2 christos if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4025 1.1.1.2 christos {
4026 1.1.1.2 christos /* We can't have a variable referred to both as a regular
4027 1.1.1.2 christos variable and through TLS relocs. */
4028 1.1.1.2 christos BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4029 1.1.1.2 christos && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4030 1.1.1.2 christos return 4;
4031 1.1.1.2 christos }
4032 1.1.1.2 christos
4033 1.1.1.2 christos if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4034 1.1.1.2 christos eltsiz += 8;
4035 1.1.1.2 christos
4036 1.1.1.2 christos if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4037 1.1.1.2 christos eltsiz += 4;
4038 1.1.1.2 christos }
4039 1.1.1.2 christos else
4040 1.1.1.2 christos {
4041 1.1.1.2 christos struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4042 1.1.1.2 christos if (hh->reg_got_refcount > 0)
4043 1.1.1.2 christos {
4044 1.1.1.2 christos /* The actual error-on-input is emitted elsewhere. */
4045 1.1.1.2 christos BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4046 1.1.1.2 christos return 4;
4047 1.1.1.2 christos }
4048 1.1.1.2 christos
4049 1.1.1.2 christos if (hh->dtp_refcount > 0)
4050 1.1.1.2 christos eltsiz += 8;
4051 1.1.1.2 christos
4052 1.1 skrll if (hh->tprel_refcount > 0)
4053 1.1 skrll eltsiz += 4;
4054 1.1.1.2 christos }
4055 1.1 skrll
4056 1.1 skrll /* We're only called when h->got.refcount is non-zero, so we must
4057 1.1 skrll have a non-zero size. */
4058 1.1.1.4 christos BFD_ASSERT (eltsiz != 0);
4059 1.1 skrll return eltsiz;
4060 1.1 skrll }
4061 1.1 skrll
4062 1.1 skrll #define ELF_ARCH bfd_arch_cris
4064 1.1 skrll #define ELF_TARGET_ID CRIS_ELF_DATA
4065 1.1 skrll #define ELF_MACHINE_CODE EM_CRIS
4066 1.1.1.2 christos #define ELF_MAXPAGESIZE 0x2000
4067 1.1.1.6 christos
4068 1.1 skrll #define TARGET_LITTLE_SYM cris_elf32_vec
4069 1.1 skrll #define TARGET_LITTLE_NAME "elf32-cris"
4070 1.1 skrll #define elf_symbol_leading_char 0
4071 1.1 skrll
4072 1.1 skrll #define elf_info_to_howto_rel NULL
4073 1.1 skrll #define elf_info_to_howto cris_info_to_howto_rela
4074 1.1 skrll #define elf_backend_relocate_section cris_elf_relocate_section
4075 1.1 skrll #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4076 1.1 skrll #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4077 1.1 skrll #define elf_backend_check_relocs cris_elf_check_relocs
4078 1.1 skrll #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4079 1.1 skrll #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4080 1.1 skrll
4081 1.1 skrll #define elf_backend_can_gc_sections 1
4082 1.1 skrll #define elf_backend_can_refcount 1
4083 1.1 skrll
4084 1.1 skrll #define elf_backend_object_p cris_elf_object_p
4085 1.1 skrll #define elf_backend_final_write_processing \
4086 1.1 skrll cris_elf_final_write_processing
4087 1.1 skrll #define bfd_elf32_bfd_print_private_bfd_data \
4088 1.1 skrll cris_elf_print_private_bfd_data
4089 1.1 skrll #define bfd_elf32_bfd_merge_private_bfd_data \
4090 1.1 skrll cris_elf_merge_private_bfd_data
4091 1.1.1.2 christos #define bfd_elf32_bfd_copy_private_bfd_data \
4092 1.1.1.2 christos cris_elf_copy_private_bfd_data
4093 1.1 skrll
4094 1.1 skrll #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4095 1.1 skrll #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4096 1.1 skrll
4097 1.1 skrll #define bfd_elf32_bfd_link_hash_table_create \
4098 1.1 skrll elf_cris_link_hash_table_create
4099 1.1 skrll #define elf_backend_adjust_dynamic_symbol \
4100 1.1 skrll elf_cris_adjust_dynamic_symbol
4101 1.1 skrll #define elf_backend_copy_indirect_symbol \
4102 1.1 skrll elf_cris_copy_indirect_symbol
4103 1.1 skrll #define elf_backend_size_dynamic_sections \
4104 1.1 skrll elf_cris_size_dynamic_sections
4105 1.1 skrll #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4106 1.1 skrll #define elf_backend_finish_dynamic_symbol \
4107 1.1 skrll elf_cris_finish_dynamic_symbol
4108 1.1 skrll #define elf_backend_finish_dynamic_sections \
4109 1.1 skrll elf_cris_finish_dynamic_sections
4110 1.1 skrll #define elf_backend_create_dynamic_sections \
4111 1.1.1.2 christos _bfd_elf_create_dynamic_sections
4112 1.1.1.6 christos #define bfd_elf32_bfd_final_link \
4113 1.1.1.6 christos bfd_elf_gc_common_final_link
4114 1.1 skrll #define elf_backend_hide_symbol elf_cris_hide_symbol
4115 1.1.1.9 christos #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4116 1.1.1.9 christos
4117 1.1 skrll #define elf_backend_want_got_plt 1
4118 1.1 skrll #define elf_backend_plt_readonly 1
4119 1.1 skrll #define elf_backend_want_plt_sym 0
4120 1.1 skrll #define elf_backend_got_header_size 12
4121 1.1 skrll #define elf_backend_got_elt_size elf_cris_got_elt_size
4122 1.1 skrll #define elf_backend_dtrel_excludes_plt 1
4123 1.1 skrll #define elf_backend_want_dynrelro 1
4124 1.1.1.9 christos
4125 1.1.1.6 christos #define elf_backend_default_execstack 0
4126 1.1 skrll
4127 1.1 skrll /* Later, we my want to optimize RELA entries into REL entries for dynamic
4128 1.1 skrll linking and libraries (if it's a win of any significance). Until then,
4129 1.1 skrll take the easy route. */
4130 1.1 skrll #define elf_backend_may_use_rel_p 0
4131 1.1 skrll #define elf_backend_may_use_rela_p 1
4132 1.1.1.4 christos #define elf_backend_rela_normal 1
4133 1.1 skrll
4134 1.1 skrll #define elf_backend_linux_prpsinfo32_ugid16 true
4135 1.1 skrll
4136 1.1 skrll #include "elf32-target.h"
4137 1.1 skrll
4138 1.1 skrll #undef TARGET_LITTLE_SYM
4139 #undef TARGET_LITTLE_NAME
4140 #undef elf_symbol_leading_char
4141
4142 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4143 #define TARGET_LITTLE_NAME "elf32-us-cris"
4144 #define elf_symbol_leading_char '_'
4145 #undef elf32_bed
4146 #define elf32_bed elf32_us_cris_bed
4147
4148 #include "elf32-target.h"
4149