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0afcef53 | 1 | /* x86 specific support for ELF |
fd67aa11 | 2 | Copyright (C) 2017-2024 Free Software Foundation, Inc. |
0afcef53 L |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
21 | #include "elfxx-x86.h" | |
a6798bab | 22 | #include "elf-vxworks.h" |
765e526c | 23 | #include "objalloc.h" |
765e526c L |
24 | |
25 | /* The name of the dynamic interpreter. This is put in the .interp | |
26 | section. */ | |
27 | ||
28 | #define ELF32_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
29 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" | |
30 | #define ELFX32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" | |
0afcef53 | 31 | |
0a1b45a2 | 32 | bool |
39946cc2 L |
33 | _bfd_x86_elf_mkobject (bfd *abfd) |
34 | { | |
35 | return bfd_elf_allocate_object (abfd, | |
36 | sizeof (struct elf_x86_obj_tdata), | |
37 | get_elf_backend_data (abfd)->target_id); | |
38 | } | |
39 | ||
0afcef53 L |
40 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
41 | executables. Rather than setting it to the beginning of the TLS | |
42 | section, we have to set it to the end. This function may be called | |
43 | multiple times, it is idempotent. */ | |
44 | ||
45 | void | |
46 | _bfd_x86_elf_set_tls_module_base (struct bfd_link_info *info) | |
47 | { | |
48 | struct elf_x86_link_hash_table *htab; | |
49 | struct bfd_link_hash_entry *base; | |
50 | const struct elf_backend_data *bed; | |
51 | ||
52 | if (!bfd_link_executable (info)) | |
53 | return; | |
54 | ||
55 | bed = get_elf_backend_data (info->output_bfd); | |
56 | htab = elf_x86_hash_table (info, bed->target_id); | |
57 | if (htab == NULL) | |
58 | return; | |
59 | ||
60 | base = htab->tls_module_base; | |
61 | if (base == NULL) | |
62 | return; | |
63 | ||
64 | base->u.def.value = htab->elf.tls_size; | |
65 | } | |
66 | ||
67 | /* Return the base VMA address which should be subtracted from real addresses | |
68 | when resolving @dtpoff relocation. | |
69 | This is PT_TLS segment p_vaddr. */ | |
70 | ||
71 | bfd_vma | |
72 | _bfd_x86_elf_dtpoff_base (struct bfd_link_info *info) | |
73 | { | |
74 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
75 | if (elf_hash_table (info)->tls_sec == NULL) | |
76 | return 0; | |
77 | return elf_hash_table (info)->tls_sec->vma; | |
78 | } | |
79 | ||
b9ce864c L |
80 | /* Allocate space in .plt, .got and associated reloc sections for |
81 | dynamic relocs. */ | |
82 | ||
0a1b45a2 | 83 | static bool |
70090aa5 | 84 | elf_x86_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
b9ce864c L |
85 | { |
86 | struct bfd_link_info *info; | |
87 | struct elf_x86_link_hash_table *htab; | |
88 | struct elf_x86_link_hash_entry *eh; | |
89 | struct elf_dyn_relocs *p; | |
90 | unsigned int plt_entry_size; | |
0a1b45a2 | 91 | bool resolved_to_zero; |
b9ce864c L |
92 | const struct elf_backend_data *bed; |
93 | ||
94 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 95 | return true; |
b9ce864c L |
96 | |
97 | eh = (struct elf_x86_link_hash_entry *) h; | |
98 | ||
99 | info = (struct bfd_link_info *) inf; | |
100 | bed = get_elf_backend_data (info->output_bfd); | |
101 | htab = elf_x86_hash_table (info, bed->target_id); | |
102 | if (htab == NULL) | |
0a1b45a2 | 103 | return false; |
b9ce864c L |
104 | |
105 | plt_entry_size = htab->plt.plt_entry_size; | |
106 | ||
c5bce5c6 | 107 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
b9ce864c | 108 | |
b9ce864c L |
109 | /* We can't use the GOT PLT if pointer equality is needed since |
110 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
111 | linker won't update the GOT slot. We will get into an infinite | |
112 | loop at run-time. */ | |
113 | if (htab->plt_got != NULL | |
114 | && h->type != STT_GNU_IFUNC | |
115 | && !h->pointer_equality_needed | |
116 | && h->plt.refcount > 0 | |
117 | && h->got.refcount > 0) | |
118 | { | |
119 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
07d6d2b8 | 120 | reloctions. */ |
b9ce864c L |
121 | h->plt.offset = (bfd_vma) -1; |
122 | ||
123 | /* Use the GOT PLT. */ | |
124 | eh->plt_got.refcount = 1; | |
125 | } | |
126 | ||
127 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it | |
128 | here if it is defined and referenced in a non-shared object. */ | |
129 | if (h->type == STT_GNU_IFUNC | |
130 | && h->def_regular) | |
131 | { | |
406b4ada L |
132 | /* GOTOFF relocation needs PLT. */ |
133 | if (eh->gotoff_ref) | |
134 | h->plt.refcount = 1; | |
135 | ||
190eb1dd | 136 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &h->dyn_relocs, |
b9ce864c L |
137 | plt_entry_size, |
138 | (htab->plt.has_plt0 | |
139 | * plt_entry_size), | |
140 | htab->got_entry_size, | |
0a1b45a2 | 141 | true)) |
b9ce864c L |
142 | { |
143 | asection *s = htab->plt_second; | |
144 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
145 | { | |
146 | /* Use the second PLT section if it is created. */ | |
147 | eh->plt_second.offset = s->size; | |
148 | ||
149 | /* Make room for this entry in the second PLT section. */ | |
150 | s->size += htab->non_lazy_plt->plt_entry_size; | |
151 | } | |
152 | ||
0a1b45a2 | 153 | return true; |
b9ce864c L |
154 | } |
155 | else | |
0a1b45a2 | 156 | return false; |
b9ce864c L |
157 | } |
158 | /* Don't create the PLT entry if there are only function pointer | |
159 | relocations which can be resolved at run-time. */ | |
160 | else if (htab->elf.dynamic_sections_created | |
79b0c981 | 161 | && (h->plt.refcount > 0 |
b9ce864c L |
162 | || eh->plt_got.refcount > 0)) |
163 | { | |
0a1b45a2 | 164 | bool use_plt_got = eh->plt_got.refcount > 0; |
b9ce864c | 165 | |
b9ce864c L |
166 | /* Make sure this symbol is output as a dynamic symbol. |
167 | Undefined weak syms won't yet be marked as dynamic. */ | |
168 | if (h->dynindx == -1 | |
169 | && !h->forced_local | |
170 | && !resolved_to_zero | |
171 | && h->root.type == bfd_link_hash_undefweak) | |
172 | { | |
173 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 174 | return false; |
b9ce864c L |
175 | } |
176 | ||
177 | if (bfd_link_pic (info) | |
178 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
179 | { | |
180 | asection *s = htab->elf.splt; | |
181 | asection *second_s = htab->plt_second; | |
182 | asection *got_s = htab->plt_got; | |
0a1b45a2 | 183 | bool use_plt; |
b9ce864c L |
184 | |
185 | /* If this is the first .plt entry, make room for the special | |
186 | first entry. The .plt section is used by prelink to undo | |
187 | prelinking for dynamic relocations. */ | |
188 | if (s->size == 0) | |
189 | s->size = htab->plt.has_plt0 * plt_entry_size; | |
190 | ||
191 | if (use_plt_got) | |
192 | eh->plt_got.offset = got_s->size; | |
193 | else | |
194 | { | |
195 | h->plt.offset = s->size; | |
196 | if (second_s) | |
197 | eh->plt_second.offset = second_s->size; | |
198 | } | |
199 | ||
200 | /* If this symbol is not defined in a regular file, and we are | |
451875b4 L |
201 | generating PDE, then set the symbol to this location in the |
202 | .plt. This is required to make function pointers compare | |
203 | as equal between PDE and the shared library. | |
204 | ||
205 | NB: If PLT is PC-relative, we can use the .plt in PIE for | |
206 | function address. */ | |
207 | if (h->def_regular) | |
0a1b45a2 | 208 | use_plt = false; |
451875b4 L |
209 | else if (htab->pcrel_plt) |
210 | use_plt = ! bfd_link_dll (info); | |
211 | else | |
212 | use_plt = bfd_link_pde (info); | |
213 | if (use_plt) | |
b9ce864c L |
214 | { |
215 | if (use_plt_got) | |
216 | { | |
217 | /* We need to make a call to the entry of the GOT PLT | |
218 | instead of regular PLT entry. */ | |
219 | h->root.u.def.section = got_s; | |
220 | h->root.u.def.value = eh->plt_got.offset; | |
221 | } | |
222 | else | |
223 | { | |
224 | if (second_s) | |
225 | { | |
226 | /* We need to make a call to the entry of the | |
227 | second PLT instead of regular PLT entry. */ | |
228 | h->root.u.def.section = second_s; | |
229 | h->root.u.def.value = eh->plt_second.offset; | |
230 | } | |
231 | else | |
232 | { | |
233 | h->root.u.def.section = s; | |
234 | h->root.u.def.value = h->plt.offset; | |
235 | } | |
236 | } | |
237 | } | |
238 | ||
239 | /* Make room for this entry. */ | |
240 | if (use_plt_got) | |
241 | got_s->size += htab->non_lazy_plt->plt_entry_size; | |
242 | else | |
243 | { | |
244 | s->size += plt_entry_size; | |
245 | if (second_s) | |
246 | second_s->size += htab->non_lazy_plt->plt_entry_size; | |
247 | ||
248 | /* We also need to make an entry in the .got.plt section, | |
249 | which will be placed in the .got section by the linker | |
250 | script. */ | |
251 | htab->elf.sgotplt->size += htab->got_entry_size; | |
252 | ||
253 | /* There should be no PLT relocation against resolved | |
254 | undefined weak symbol in executable. */ | |
255 | if (!resolved_to_zero) | |
256 | { | |
257 | /* We also need to make an entry in the .rel.plt | |
258 | section. */ | |
259 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
260 | htab->elf.srelplt->reloc_count++; | |
261 | } | |
262 | } | |
263 | ||
90c14f0c | 264 | if (htab->elf.target_os == is_vxworks && !bfd_link_pic (info)) |
b9ce864c L |
265 | { |
266 | /* VxWorks has a second set of relocations for each PLT entry | |
267 | in executables. They go in a separate relocation section, | |
268 | which is processed by the kernel loader. */ | |
269 | ||
270 | /* There are two relocations for the initial PLT entry: an | |
271 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
272 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
273 | ||
274 | asection *srelplt2 = htab->srelplt2; | |
275 | if (h->plt.offset == plt_entry_size) | |
276 | srelplt2->size += (htab->sizeof_reloc * 2); | |
277 | ||
278 | /* There are two extra relocations for each subsequent PLT entry: | |
279 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
280 | relocation for the PLT entry. */ | |
281 | ||
282 | srelplt2->size += (htab->sizeof_reloc * 2); | |
283 | } | |
284 | } | |
285 | else | |
286 | { | |
287 | eh->plt_got.offset = (bfd_vma) -1; | |
288 | h->plt.offset = (bfd_vma) -1; | |
289 | h->needs_plt = 0; | |
290 | } | |
291 | } | |
292 | else | |
293 | { | |
294 | eh->plt_got.offset = (bfd_vma) -1; | |
295 | h->plt.offset = (bfd_vma) -1; | |
296 | h->needs_plt = 0; | |
297 | } | |
298 | ||
299 | eh->tlsdesc_got = (bfd_vma) -1; | |
300 | ||
301 | /* For i386, if R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the | |
302 | binary, make it a R_386_TLS_LE_32 requiring no TLS entry. For | |
303 | x86-64, if R_X86_64_GOTTPOFF symbol is now local to the binary, | |
304 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
305 | if (h->got.refcount > 0 | |
306 | && bfd_link_executable (info) | |
307 | && h->dynindx == -1 | |
308 | && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE)) | |
309 | h->got.offset = (bfd_vma) -1; | |
310 | else if (h->got.refcount > 0) | |
311 | { | |
312 | asection *s; | |
0a1b45a2 | 313 | bool dyn; |
b9ce864c L |
314 | int tls_type = elf_x86_hash_entry (h)->tls_type; |
315 | ||
316 | /* Make sure this symbol is output as a dynamic symbol. | |
317 | Undefined weak syms won't yet be marked as dynamic. */ | |
318 | if (h->dynindx == -1 | |
319 | && !h->forced_local | |
320 | && !resolved_to_zero | |
321 | && h->root.type == bfd_link_hash_undefweak) | |
322 | { | |
323 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 324 | return false; |
b9ce864c L |
325 | } |
326 | ||
327 | s = htab->elf.sgot; | |
328 | if (GOT_TLS_GDESC_P (tls_type)) | |
329 | { | |
330 | eh->tlsdesc_got = htab->elf.sgotplt->size | |
331 | - elf_x86_compute_jump_table_size (htab); | |
332 | htab->elf.sgotplt->size += 2 * htab->got_entry_size; | |
333 | h->got.offset = (bfd_vma) -2; | |
334 | } | |
335 | if (! GOT_TLS_GDESC_P (tls_type) | |
336 | || GOT_TLS_GD_P (tls_type)) | |
337 | { | |
338 | h->got.offset = s->size; | |
339 | s->size += htab->got_entry_size; | |
340 | /* R_386_TLS_GD and R_X86_64_TLSGD need 2 consecutive GOT | |
341 | slots. */ | |
342 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
343 | s->size += htab->got_entry_size; | |
344 | } | |
345 | dyn = htab->elf.dynamic_sections_created; | |
346 | /* R_386_TLS_IE_32 needs one dynamic relocation, | |
347 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, | |
348 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
349 | need two), R_386_TLS_GD and R_X86_64_TLSGD need one if local | |
350 | symbol and two if global. No dynamic relocation against | |
382aae06 L |
351 | resolved undefined weak symbol in executable. No dynamic |
352 | relocation against non-preemptible absolute symbol. */ | |
b9ce864c L |
353 | if (tls_type == GOT_TLS_IE_BOTH) |
354 | htab->elf.srelgot->size += 2 * htab->sizeof_reloc; | |
355 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) | |
356 | || (tls_type & GOT_TLS_IE)) | |
357 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
358 | else if (GOT_TLS_GD_P (tls_type)) | |
359 | htab->elf.srelgot->size += 2 * htab->sizeof_reloc; | |
360 | else if (! GOT_TLS_GDESC_P (tls_type) | |
361 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
362 | && !resolved_to_zero) | |
363 | || h->root.type != bfd_link_hash_undefweak) | |
382aae06 L |
364 | && ((bfd_link_pic (info) |
365 | && !(h->dynindx == -1 | |
366 | && ABS_SYMBOL_P (h))) | |
b9ce864c L |
367 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
368 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
369 | if (GOT_TLS_GDESC_P (tls_type)) | |
0e30d991 L |
370 | { |
371 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
372 | if (bed->target_id == X86_64_ELF_DATA) | |
9bcc30e4 | 373 | htab->elf.tlsdesc_plt = (bfd_vma) -1; |
0e30d991 | 374 | } |
b9ce864c L |
375 | } |
376 | else | |
377 | h->got.offset = (bfd_vma) -1; | |
378 | ||
190eb1dd | 379 | if (h->dyn_relocs == NULL) |
0a1b45a2 | 380 | return true; |
b9ce864c L |
381 | |
382 | /* In the shared -Bsymbolic case, discard space allocated for | |
383 | dynamic pc-relative relocs against symbols which turn out to be | |
384 | defined in regular objects. For the normal shared case, discard | |
385 | space for pc-relative relocs that have become local due to symbol | |
386 | visibility changes. */ | |
387 | ||
388 | if (bfd_link_pic (info)) | |
389 | { | |
390 | /* Relocs that use pc_count are those that appear on a call | |
391 | insn, or certain REL relocs that can generated via assembly. | |
392 | We want calls to protected symbols to resolve directly to the | |
393 | function rather than going via the plt. If people want | |
394 | function pointer comparisons to work as expected then they | |
395 | should avoid writing weird assembly. */ | |
396 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
397 | { | |
398 | struct elf_dyn_relocs **pp; | |
399 | ||
190eb1dd | 400 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
b9ce864c L |
401 | { |
402 | p->count -= p->pc_count; | |
403 | p->pc_count = 0; | |
404 | if (p->count == 0) | |
405 | *pp = p->next; | |
406 | else | |
407 | pp = &p->next; | |
408 | } | |
409 | } | |
410 | ||
90c14f0c | 411 | if (htab->elf.target_os == is_vxworks) |
b9ce864c L |
412 | { |
413 | struct elf_dyn_relocs **pp; | |
190eb1dd | 414 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
b9ce864c L |
415 | { |
416 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
417 | *pp = p->next; | |
418 | else | |
419 | pp = &p->next; | |
420 | } | |
421 | } | |
422 | ||
423 | /* Also discard relocs on undefined weak syms with non-default | |
424 | visibility or in PIE. */ | |
190eb1dd | 425 | if (h->dyn_relocs != NULL) |
b9ce864c L |
426 | { |
427 | if (h->root.type == bfd_link_hash_undefweak) | |
428 | { | |
429 | /* Undefined weak symbol is never bound locally in shared | |
430 | library. */ | |
431 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
432 | || resolved_to_zero) | |
433 | { | |
434 | if (bed->target_id == I386_ELF_DATA | |
435 | && h->non_got_ref) | |
436 | { | |
437 | /* Keep dynamic non-GOT/non-PLT relocation so | |
438 | that we can branch to 0 without PLT. */ | |
439 | struct elf_dyn_relocs **pp; | |
440 | ||
190eb1dd | 441 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
b9ce864c L |
442 | if (p->pc_count == 0) |
443 | *pp = p->next; | |
444 | else | |
445 | { | |
446 | /* Remove non-R_386_PC32 relocation. */ | |
447 | p->count = p->pc_count; | |
448 | pp = &p->next; | |
449 | } | |
450 | ||
451 | /* Make sure undefined weak symbols are output | |
452 | as dynamic symbols in PIEs for dynamic non-GOT | |
453 | non-PLT reloations. */ | |
190eb1dd | 454 | if (h->dyn_relocs != NULL |
b9ce864c | 455 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
0a1b45a2 | 456 | return false; |
b9ce864c L |
457 | } |
458 | else | |
190eb1dd | 459 | h->dyn_relocs = NULL; |
b9ce864c L |
460 | } |
461 | else if (h->dynindx == -1 | |
462 | && !h->forced_local | |
463 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 464 | return false; |
b9ce864c L |
465 | } |
466 | else if (bfd_link_executable (info) | |
467 | && (h->needs_copy || eh->needs_copy) | |
468 | && h->def_dynamic | |
469 | && !h->def_regular) | |
470 | { | |
471 | /* NB: needs_copy is set only for x86-64. For PIE, | |
472 | discard space for pc-relative relocs against symbols | |
473 | which turn out to need copy relocs. */ | |
474 | struct elf_dyn_relocs **pp; | |
475 | ||
190eb1dd | 476 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
b9ce864c L |
477 | { |
478 | if (p->pc_count != 0) | |
479 | *pp = p->next; | |
480 | else | |
481 | pp = &p->next; | |
482 | } | |
483 | } | |
484 | } | |
485 | } | |
486 | else if (ELIMINATE_COPY_RELOCS) | |
487 | { | |
488 | /* For the non-shared case, discard space for relocs against | |
489 | symbols which turn out to need copy relocs or are not | |
490 | dynamic. Keep dynamic relocations for run-time function | |
491 | pointer initialization. */ | |
492 | ||
493 | if ((!h->non_got_ref | |
b9ce864c L |
494 | || (h->root.type == bfd_link_hash_undefweak |
495 | && !resolved_to_zero)) | |
496 | && ((h->def_dynamic | |
497 | && !h->def_regular) | |
498 | || (htab->elf.dynamic_sections_created | |
499 | && (h->root.type == bfd_link_hash_undefweak | |
500 | || h->root.type == bfd_link_hash_undefined)))) | |
501 | { | |
502 | /* Make sure this symbol is output as a dynamic symbol. | |
503 | Undefined weak syms won't yet be marked as dynamic. */ | |
504 | if (h->dynindx == -1 | |
505 | && !h->forced_local | |
506 | && !resolved_to_zero | |
507 | && h->root.type == bfd_link_hash_undefweak | |
508 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 509 | return false; |
b9ce864c L |
510 | |
511 | /* If that succeeded, we know we'll be keeping all the | |
512 | relocs. */ | |
513 | if (h->dynindx != -1) | |
514 | goto keep; | |
515 | } | |
516 | ||
190eb1dd | 517 | h->dyn_relocs = NULL; |
b9ce864c L |
518 | |
519 | keep: ; | |
520 | } | |
521 | ||
522 | /* Finally, allocate space. */ | |
190eb1dd | 523 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
b9ce864c L |
524 | { |
525 | asection *sreloc; | |
526 | ||
f6386577 | 527 | if (eh->def_protected && bfd_link_executable (info)) |
ebb191ad L |
528 | { |
529 | /* Disallow copy relocation against non-copyable protected | |
530 | symbol. */ | |
531 | asection *s = p->sec->output_section; | |
532 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
533 | { | |
534 | info->callbacks->einfo | |
535 | /* xgettext:c-format */ | |
536 | (_("%F%P: %pB: copy relocation against non-copyable " | |
537 | "protected symbol `%s' in %pB\n"), | |
538 | p->sec->owner, h->root.root.string, | |
539 | h->root.u.def.section->owner); | |
540 | return false; | |
541 | } | |
542 | } | |
543 | ||
b9ce864c L |
544 | sreloc = elf_section_data (p->sec)->sreloc; |
545 | ||
546 | BFD_ASSERT (sreloc != NULL); | |
547 | sreloc->size += p->count * htab->sizeof_reloc; | |
548 | } | |
549 | ||
0a1b45a2 | 550 | return true; |
b9ce864c L |
551 | } |
552 | ||
b9ce864c L |
553 | /* Allocate space in .plt, .got and associated reloc sections for |
554 | local dynamic relocs. */ | |
555 | ||
1201fda6 | 556 | static int |
5e2ac45d | 557 | elf_x86_allocate_local_dynreloc (void **slot, void *inf) |
b9ce864c L |
558 | { |
559 | struct elf_link_hash_entry *h | |
560 | = (struct elf_link_hash_entry *) *slot; | |
561 | ||
562 | if (h->type != STT_GNU_IFUNC | |
563 | || !h->def_regular | |
564 | || !h->ref_regular | |
565 | || !h->forced_local | |
566 | || h->root.type != bfd_link_hash_defined) | |
567 | abort (); | |
568 | ||
5e2ac45d | 569 | return elf_x86_allocate_dynrelocs (h, inf); |
b9ce864c L |
570 | } |
571 | ||
0afcef53 L |
572 | /* Find and/or create a hash entry for local symbol. */ |
573 | ||
574 | struct elf_link_hash_entry * | |
575 | _bfd_elf_x86_get_local_sym_hash (struct elf_x86_link_hash_table *htab, | |
576 | bfd *abfd, const Elf_Internal_Rela *rel, | |
0a1b45a2 | 577 | bool create) |
0afcef53 L |
578 | { |
579 | struct elf_x86_link_hash_entry e, *ret; | |
580 | asection *sec = abfd->sections; | |
581 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, | |
582 | htab->r_sym (rel->r_info)); | |
583 | void **slot; | |
584 | ||
585 | e.elf.indx = sec->id; | |
586 | e.elf.dynstr_index = htab->r_sym (rel->r_info); | |
587 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
588 | create ? INSERT : NO_INSERT); | |
589 | ||
590 | if (!slot) | |
591 | return NULL; | |
592 | ||
593 | if (*slot) | |
594 | { | |
595 | ret = (struct elf_x86_link_hash_entry *) *slot; | |
596 | return &ret->elf; | |
597 | } | |
598 | ||
599 | ret = (struct elf_x86_link_hash_entry *) | |
600 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
601 | sizeof (struct elf_x86_link_hash_entry)); | |
602 | if (ret) | |
603 | { | |
604 | memset (ret, 0, sizeof (*ret)); | |
605 | ret->elf.indx = sec->id; | |
606 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); | |
607 | ret->elf.dynindx = -1; | |
608 | ret->plt_got.offset = (bfd_vma) -1; | |
609 | *slot = ret; | |
610 | } | |
611 | return &ret->elf; | |
612 | } | |
613 | ||
614 | /* Create an entry in a x86 ELF linker hash table. NB: THIS MUST BE IN | |
615 | SYNC WITH _bfd_elf_link_hash_newfunc. */ | |
616 | ||
617 | struct bfd_hash_entry * | |
618 | _bfd_x86_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
619 | struct bfd_hash_table *table, | |
620 | const char *string) | |
621 | { | |
622 | /* Allocate the structure if it has not already been allocated by a | |
623 | subclass. */ | |
624 | if (entry == NULL) | |
625 | { | |
626 | entry = (struct bfd_hash_entry *) | |
627 | bfd_hash_allocate (table, | |
628 | sizeof (struct elf_x86_link_hash_entry)); | |
629 | if (entry == NULL) | |
630 | return entry; | |
631 | } | |
632 | ||
633 | /* Call the allocation method of the superclass. */ | |
634 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
635 | if (entry != NULL) | |
636 | { | |
637 | struct elf_x86_link_hash_entry *eh | |
638 | = (struct elf_x86_link_hash_entry *) entry; | |
639 | struct elf_link_hash_table *htab | |
640 | = (struct elf_link_hash_table *) table; | |
641 | ||
642 | memset (&eh->elf.size, 0, | |
643 | (sizeof (struct elf_x86_link_hash_entry) | |
644 | - offsetof (struct elf_link_hash_entry, size))); | |
645 | /* Set local fields. */ | |
646 | eh->elf.indx = -1; | |
647 | eh->elf.dynindx = -1; | |
648 | eh->elf.got = htab->init_got_refcount; | |
649 | eh->elf.plt = htab->init_plt_refcount; | |
650 | /* Assume that we have been called by a non-ELF symbol reader. | |
651 | This flag is then reset by the code which reads an ELF input | |
652 | file. This ensures that a symbol created by a non-ELF symbol | |
653 | reader will have the flag set correctly. */ | |
654 | eh->elf.non_elf = 1; | |
655 | eh->plt_second.offset = (bfd_vma) -1; | |
656 | eh->plt_got.offset = (bfd_vma) -1; | |
657 | eh->tlsdesc_got = (bfd_vma) -1; | |
98b273dc | 658 | eh->zero_undefweak = 1; |
0afcef53 L |
659 | } |
660 | ||
661 | return entry; | |
662 | } | |
663 | ||
664 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry | |
665 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
666 | as global symbol. We reuse indx and dynstr_index for local symbol | |
667 | hash since they aren't used by global symbols in this backend. */ | |
668 | ||
669 | hashval_t | |
670 | _bfd_x86_elf_local_htab_hash (const void *ptr) | |
671 | { | |
672 | struct elf_link_hash_entry *h | |
673 | = (struct elf_link_hash_entry *) ptr; | |
674 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); | |
675 | } | |
676 | ||
677 | /* Compare local hash entries. */ | |
678 | ||
679 | int | |
680 | _bfd_x86_elf_local_htab_eq (const void *ptr1, const void *ptr2) | |
681 | { | |
682 | struct elf_link_hash_entry *h1 | |
683 | = (struct elf_link_hash_entry *) ptr1; | |
684 | struct elf_link_hash_entry *h2 | |
685 | = (struct elf_link_hash_entry *) ptr2; | |
686 | ||
687 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
688 | } | |
689 | ||
690 | /* Destroy an x86 ELF linker hash table. */ | |
691 | ||
765e526c L |
692 | static void |
693 | elf_x86_link_hash_table_free (bfd *obfd) | |
0afcef53 L |
694 | { |
695 | struct elf_x86_link_hash_table *htab | |
696 | = (struct elf_x86_link_hash_table *) obfd->link.hash; | |
697 | ||
698 | if (htab->loc_hash_table) | |
699 | htab_delete (htab->loc_hash_table); | |
700 | if (htab->loc_hash_memory) | |
701 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
702 | _bfd_elf_link_hash_table_free (obfd); | |
703 | } | |
704 | ||
0a1b45a2 | 705 | static bool |
5e2ac45d L |
706 | elf_i386_is_reloc_section (const char *secname) |
707 | { | |
08dedd66 | 708 | return startswith (secname, ".rel"); |
5e2ac45d L |
709 | } |
710 | ||
0a1b45a2 | 711 | static bool |
5e2ac45d L |
712 | elf_x86_64_is_reloc_section (const char *secname) |
713 | { | |
08dedd66 | 714 | return startswith (secname, ".rela"); |
5e2ac45d | 715 | } |
5e2ac45d | 716 | |
765e526c L |
717 | /* Create an x86 ELF linker hash table. */ |
718 | ||
719 | struct bfd_link_hash_table * | |
720 | _bfd_x86_elf_link_hash_table_create (bfd *abfd) | |
721 | { | |
722 | struct elf_x86_link_hash_table *ret; | |
723 | const struct elf_backend_data *bed; | |
986f0783 | 724 | size_t amt = sizeof (struct elf_x86_link_hash_table); |
765e526c L |
725 | |
726 | ret = (struct elf_x86_link_hash_table *) bfd_zmalloc (amt); | |
727 | if (ret == NULL) | |
728 | return NULL; | |
729 | ||
730 | bed = get_elf_backend_data (abfd); | |
731 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
732 | _bfd_x86_elf_link_hash_newfunc, | |
733 | sizeof (struct elf_x86_link_hash_entry), | |
734 | bed->target_id)) | |
735 | { | |
736 | free (ret); | |
737 | return NULL; | |
738 | } | |
739 | ||
5e2ac45d L |
740 | if (bed->target_id == X86_64_ELF_DATA) |
741 | { | |
5e2ac45d | 742 | ret->is_reloc_section = elf_x86_64_is_reloc_section; |
5e2ac45d | 743 | ret->got_entry_size = 8; |
0a1b45a2 | 744 | ret->pcrel_plt = true; |
f04bdfa7 | 745 | ret->tls_get_addr = "__tls_get_addr"; |
5af6f000 L |
746 | ret->relative_r_type = R_X86_64_RELATIVE; |
747 | ret->relative_r_name = "R_X86_64_RELATIVE"; | |
748 | ret->elf_append_reloc = elf_append_rela; | |
749 | ret->elf_write_addend_in_got = _bfd_elf64_write_addend; | |
5e2ac45d | 750 | } |
765e526c L |
751 | if (ABI_64_P (abfd)) |
752 | { | |
503294e7 | 753 | ret->sizeof_reloc = sizeof (Elf64_External_Rela); |
765e526c L |
754 | ret->pointer_r_type = R_X86_64_64; |
755 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; | |
756 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
5af6f000 | 757 | ret->elf_write_addend = _bfd_elf64_write_addend; |
765e526c L |
758 | } |
759 | else | |
765e526c | 760 | { |
5b86dbf4 | 761 | if (bed->target_id == X86_64_ELF_DATA) |
765e526c | 762 | { |
503294e7 | 763 | ret->sizeof_reloc = sizeof (Elf32_External_Rela); |
765e526c L |
764 | ret->pointer_r_type = R_X86_64_32; |
765 | ret->dynamic_interpreter = ELFX32_DYNAMIC_INTERPRETER; | |
766 | ret->dynamic_interpreter_size | |
767 | = sizeof ELFX32_DYNAMIC_INTERPRETER; | |
5af6f000 | 768 | ret->elf_write_addend = _bfd_elf32_write_addend; |
765e526c L |
769 | } |
770 | else | |
771 | { | |
5e2ac45d | 772 | ret->is_reloc_section = elf_i386_is_reloc_section; |
503294e7 | 773 | ret->sizeof_reloc = sizeof (Elf32_External_Rel); |
9ff114ca | 774 | ret->got_entry_size = 4; |
0a1b45a2 | 775 | ret->pcrel_plt = false; |
765e526c | 776 | ret->pointer_r_type = R_386_32; |
5af6f000 L |
777 | ret->relative_r_type = R_386_RELATIVE; |
778 | ret->relative_r_name = "R_386_RELATIVE"; | |
779 | ret->elf_append_reloc = elf_append_rel; | |
780 | ret->elf_write_addend = _bfd_elf32_write_addend; | |
781 | ret->elf_write_addend_in_got = _bfd_elf32_write_addend; | |
765e526c L |
782 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
783 | ret->dynamic_interpreter_size | |
784 | = sizeof ELF32_DYNAMIC_INTERPRETER; | |
785 | ret->tls_get_addr = "___tls_get_addr"; | |
786 | } | |
787 | } | |
788 | ||
789 | ret->loc_hash_table = htab_try_create (1024, | |
790 | _bfd_x86_elf_local_htab_hash, | |
791 | _bfd_x86_elf_local_htab_eq, | |
792 | NULL); | |
793 | ret->loc_hash_memory = objalloc_create (); | |
794 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
795 | { | |
796 | elf_x86_link_hash_table_free (abfd); | |
797 | return NULL; | |
798 | } | |
799 | ret->elf.root.hash_table_free = elf_x86_link_hash_table_free; | |
800 | ||
801 | return &ret->elf.root; | |
802 | } | |
803 | ||
0afcef53 L |
804 | /* Sort relocs into address order. */ |
805 | ||
806 | int | |
807 | _bfd_x86_elf_compare_relocs (const void *ap, const void *bp) | |
808 | { | |
809 | const arelent *a = * (const arelent **) ap; | |
810 | const arelent *b = * (const arelent **) bp; | |
811 | ||
812 | if (a->address > b->address) | |
813 | return 1; | |
814 | else if (a->address < b->address) | |
815 | return -1; | |
816 | else | |
817 | return 0; | |
818 | } | |
819 | ||
9bc935ef L |
820 | /* Mark symbol, NAME, as locally defined by linker if it is referenced |
821 | and not defined in a relocatable object file. */ | |
822 | ||
823 | static void | |
824 | elf_x86_linker_defined (struct bfd_link_info *info, const char *name) | |
825 | { | |
826 | struct elf_link_hash_entry *h; | |
827 | ||
828 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
0a1b45a2 | 829 | false, false, false); |
9bc935ef L |
830 | if (h == NULL) |
831 | return; | |
832 | ||
833 | while (h->root.type == bfd_link_hash_indirect) | |
834 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
835 | ||
836 | if (h->root.type == bfd_link_hash_new | |
837 | || h->root.type == bfd_link_hash_undefined | |
838 | || h->root.type == bfd_link_hash_undefweak | |
839 | || h->root.type == bfd_link_hash_common | |
840 | || (!h->def_regular && h->def_dynamic)) | |
841 | { | |
842 | elf_x86_hash_entry (h)->local_ref = 2; | |
843 | elf_x86_hash_entry (h)->linker_def = 1; | |
844 | } | |
845 | } | |
846 | ||
ecf99cc0 L |
847 | /* Hide a linker-defined symbol, NAME, with hidden visibility. */ |
848 | ||
849 | static void | |
850 | elf_x86_hide_linker_defined (struct bfd_link_info *info, | |
851 | const char *name) | |
852 | { | |
853 | struct elf_link_hash_entry *h; | |
854 | ||
855 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
0a1b45a2 | 856 | false, false, false); |
ecf99cc0 L |
857 | if (h == NULL) |
858 | return; | |
859 | ||
860 | while (h->root.type == bfd_link_hash_indirect) | |
861 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
862 | ||
863 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
864 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
0a1b45a2 | 865 | _bfd_elf_link_hash_hide_symbol (info, h, true); |
ecf99cc0 L |
866 | } |
867 | ||
0a1b45a2 | 868 | bool |
0afcef53 L |
869 | _bfd_x86_elf_link_check_relocs (bfd *abfd, struct bfd_link_info *info) |
870 | { | |
871 | if (!bfd_link_relocatable (info)) | |
872 | { | |
873 | /* Check for __tls_get_addr reference. */ | |
874 | struct elf_x86_link_hash_table *htab; | |
875 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
876 | htab = elf_x86_hash_table (info, bed->target_id); | |
877 | if (htab) | |
878 | { | |
0a27fed7 L |
879 | struct elf_link_hash_entry *h; |
880 | ||
881 | h = elf_link_hash_lookup (elf_hash_table (info), | |
0afcef53 | 882 | htab->tls_get_addr, |
0a1b45a2 | 883 | false, false, false); |
0afcef53 | 884 | if (h != NULL) |
8a1b824a L |
885 | { |
886 | elf_x86_hash_entry (h)->tls_get_addr = 1; | |
887 | ||
888 | /* Check the versioned __tls_get_addr symbol. */ | |
889 | while (h->root.type == bfd_link_hash_indirect) | |
890 | { | |
891 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
892 | elf_x86_hash_entry (h)->tls_get_addr = 1; | |
893 | } | |
894 | } | |
0a27fed7 L |
895 | |
896 | /* "__ehdr_start" will be defined by linker as a hidden symbol | |
897 | later if it is referenced and not defined. */ | |
9bc935ef L |
898 | elf_x86_linker_defined (info, "__ehdr_start"); |
899 | ||
900 | if (bfd_link_executable (info)) | |
0a27fed7 | 901 | { |
9bc935ef L |
902 | /* References to __bss_start, _end and _edata should be |
903 | locally resolved within executables. */ | |
904 | elf_x86_linker_defined (info, "__bss_start"); | |
905 | elf_x86_linker_defined (info, "_end"); | |
906 | elf_x86_linker_defined (info, "_edata"); | |
ecf99cc0 L |
907 | } |
908 | else | |
909 | { | |
910 | /* Hide hidden __bss_start, _end and _edata in shared | |
911 | libraries. */ | |
912 | elf_x86_hide_linker_defined (info, "__bss_start"); | |
913 | elf_x86_hide_linker_defined (info, "_end"); | |
914 | elf_x86_hide_linker_defined (info, "_edata"); | |
0a27fed7 | 915 | } |
0afcef53 L |
916 | } |
917 | } | |
918 | ||
919 | /* Invoke the regular ELF backend linker to do all the work. */ | |
920 | return _bfd_elf_link_check_relocs (abfd, info); | |
921 | } | |
922 | ||
3747999c L |
923 | /* Look through the relocs for a section before allocation to make the |
924 | dynamic reloc section. */ | |
925 | ||
926 | bool | |
927 | _bfd_x86_elf_check_relocs (bfd *abfd, | |
928 | struct bfd_link_info *info, | |
929 | asection *sec, | |
930 | const Elf_Internal_Rela *relocs) | |
931 | { | |
932 | struct elf_x86_link_hash_table *htab; | |
933 | Elf_Internal_Shdr *symtab_hdr; | |
934 | struct elf_link_hash_entry **sym_hashes; | |
935 | const Elf_Internal_Rela *rel; | |
936 | const Elf_Internal_Rela *rel_end; | |
937 | asection *sreloc; | |
938 | const struct elf_backend_data *bed; | |
939 | bool is_x86_64; | |
940 | ||
941 | if (bfd_link_relocatable (info)) | |
942 | return true; | |
943 | ||
944 | bed = get_elf_backend_data (abfd); | |
945 | htab = elf_x86_hash_table (info, bed->target_id); | |
946 | if (htab == NULL) | |
947 | { | |
948 | sec->check_relocs_failed = 1; | |
949 | return false; | |
950 | } | |
951 | ||
952 | is_x86_64 = bed->target_id == X86_64_ELF_DATA; | |
953 | ||
954 | symtab_hdr = &elf_symtab_hdr (abfd); | |
955 | sym_hashes = elf_sym_hashes (abfd); | |
956 | ||
957 | rel_end = relocs + sec->reloc_count; | |
958 | for (rel = relocs; rel < rel_end; rel++) | |
959 | { | |
960 | unsigned int r_type; | |
961 | unsigned int r_symndx; | |
962 | struct elf_link_hash_entry *h; | |
963 | ||
964 | r_symndx = htab->r_sym (rel->r_info); | |
965 | r_type = ELF32_R_TYPE (rel->r_info); | |
966 | ||
967 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
968 | { | |
969 | /* xgettext:c-format */ | |
970 | _bfd_error_handler (_("%pB: bad symbol index: %d"), | |
971 | abfd, r_symndx); | |
972 | goto error_return; | |
973 | } | |
974 | ||
975 | if (r_symndx < symtab_hdr->sh_info) | |
976 | h = NULL; | |
977 | else | |
978 | { | |
979 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
980 | while (h->root.type == bfd_link_hash_indirect | |
981 | || h->root.type == bfd_link_hash_warning) | |
982 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
983 | } | |
984 | ||
985 | if (X86_NEED_DYNAMIC_RELOC_TYPE_P (is_x86_64, r_type) | |
986 | && NEED_DYNAMIC_RELOCATION_P (is_x86_64, info, true, h, sec, | |
987 | r_type, htab->pointer_r_type)) | |
988 | { | |
989 | /* We may copy these reloc types into the output file. | |
990 | Create a reloc section in dynobj and make room for | |
991 | this reloc. */ | |
992 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
993 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, | |
994 | abfd, sec->use_rela_p); | |
995 | ||
996 | if (sreloc != NULL) | |
997 | return true; | |
998 | ||
999 | error_return: | |
1000 | sec->check_relocs_failed = 1; | |
1001 | return false; | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | return true; | |
1006 | } | |
1007 | ||
5af6f000 L |
1008 | /* Add an entry to the relative reloc record. */ |
1009 | ||
1010 | static bool | |
1011 | elf_x86_relative_reloc_record_add | |
1012 | (struct bfd_link_info *info, | |
1013 | struct elf_x86_relative_reloc_data *relative_reloc, | |
1014 | Elf_Internal_Rela *rel, asection *sec, | |
1015 | asection *sym_sec, struct elf_link_hash_entry *h, | |
d8bcb872 | 1016 | Elf_Internal_Sym *sym, bfd_vma offset, bool *keep_symbuf_p) |
5af6f000 L |
1017 | { |
1018 | bfd_size_type newidx; | |
1019 | ||
1020 | if (relative_reloc->data == NULL) | |
1021 | { | |
1022 | relative_reloc->data = bfd_malloc | |
1023 | (sizeof (struct elf_x86_relative_reloc_record)); | |
1024 | relative_reloc->count = 0; | |
1025 | relative_reloc->size = 1; | |
1026 | } | |
1027 | ||
1028 | newidx = relative_reloc->count++; | |
1029 | ||
1030 | if (relative_reloc->count > relative_reloc->size) | |
1031 | { | |
1032 | relative_reloc->size <<= 1; | |
1033 | relative_reloc->data = bfd_realloc | |
1034 | (relative_reloc->data, | |
1035 | (relative_reloc->size | |
1036 | * sizeof (struct elf_x86_relative_reloc_record))); | |
1037 | } | |
1038 | ||
1039 | if (relative_reloc->data == NULL) | |
1040 | { | |
1041 | info->callbacks->einfo | |
1042 | /* xgettext:c-format */ | |
1043 | (_("%F%P: %pB: failed to allocate relative reloc record\n"), | |
1044 | info->output_bfd); | |
1045 | return false; | |
1046 | } | |
1047 | ||
1048 | relative_reloc->data[newidx].rel = *rel; | |
1049 | relative_reloc->data[newidx].sec = sec; | |
1050 | if (h != NULL) | |
1051 | { | |
1052 | /* Set SYM to NULL to indicate a global symbol. */ | |
1053 | relative_reloc->data[newidx].sym = NULL; | |
1054 | relative_reloc->data[newidx].u.h = h; | |
1055 | } | |
1056 | else | |
1057 | { | |
1058 | relative_reloc->data[newidx].sym = sym; | |
1059 | relative_reloc->data[newidx].u.sym_sec = sym_sec; | |
d8bcb872 L |
1060 | /* We must keep the symbol buffer since SYM will be used later. */ |
1061 | *keep_symbuf_p = true; | |
5af6f000 L |
1062 | } |
1063 | relative_reloc->data[newidx].offset = offset; | |
1064 | relative_reloc->data[newidx].address = 0; | |
1065 | return true; | |
1066 | } | |
1067 | ||
1068 | /* After input sections have been mapped to output sections and | |
1069 | addresses of output sections are set initiallly, scan input | |
1070 | relocations with the same logic in relocate_section to determine | |
1071 | if a relative relocation should be generated. Save the relative | |
1072 | relocation candidate information for sizing the DT_RELR section | |
1073 | later after all symbols addresses can be determined. */ | |
1074 | ||
1075 | bool | |
1076 | _bfd_x86_elf_link_relax_section (bfd *abfd ATTRIBUTE_UNUSED, | |
1077 | asection *input_section, | |
1078 | struct bfd_link_info *info, | |
1079 | bool *again) | |
1080 | { | |
1081 | Elf_Internal_Shdr *symtab_hdr; | |
1082 | Elf_Internal_Rela *internal_relocs; | |
1083 | Elf_Internal_Rela *irel, *irelend; | |
1084 | Elf_Internal_Sym *isymbuf = NULL; | |
1085 | struct elf_link_hash_entry **sym_hashes; | |
1086 | const struct elf_backend_data *bed; | |
1087 | struct elf_x86_link_hash_table *htab; | |
1088 | bfd_vma *local_got_offsets; | |
1089 | bool is_x86_64; | |
1090 | bool unaligned_section; | |
d8bcb872 L |
1091 | bool return_status = false; |
1092 | bool keep_symbuf = false; | |
5af6f000 L |
1093 | |
1094 | if (bfd_link_relocatable (info)) | |
1095 | return true; | |
1096 | ||
1097 | /* Assume we're not going to change any sizes, and we'll only need | |
1098 | one pass. */ | |
1099 | *again = false; | |
1100 | ||
1101 | bed = get_elf_backend_data (abfd); | |
1102 | htab = elf_x86_hash_table (info, bed->target_id); | |
1103 | if (htab == NULL) | |
1104 | return true; | |
1105 | ||
1106 | /* Nothing to do if there are no relocations or relative relocations | |
1107 | have been packed. */ | |
1108 | if (input_section == htab->elf.srelrdyn | |
1109 | || input_section->relative_reloc_packed | |
1110 | || ((input_section->flags & (SEC_RELOC | SEC_ALLOC)) | |
1111 | != (SEC_RELOC | SEC_ALLOC)) | |
1112 | || (input_section->flags & SEC_DEBUGGING) != 0 | |
1113 | || input_section->reloc_count == 0) | |
1114 | return true; | |
1115 | ||
1116 | /* Skip if the section isn't aligned. */ | |
1117 | unaligned_section = input_section->alignment_power == 0; | |
1118 | ||
1119 | is_x86_64 = bed->target_id == X86_64_ELF_DATA; | |
1120 | ||
1121 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1122 | sym_hashes = elf_sym_hashes (abfd); | |
1123 | local_got_offsets = elf_local_got_offsets (abfd); | |
1124 | ||
1125 | /* Load the relocations for this section. */ | |
1126 | internal_relocs = | |
d8bcb872 L |
1127 | _bfd_elf_link_info_read_relocs (abfd, info, input_section, NULL, |
1128 | (Elf_Internal_Rela *) NULL, | |
1129 | info->keep_memory); | |
5af6f000 L |
1130 | if (internal_relocs == NULL) |
1131 | return false; | |
1132 | ||
1133 | irelend = internal_relocs + input_section->reloc_count; | |
1134 | for (irel = internal_relocs; irel < irelend; irel++) | |
1135 | { | |
1136 | unsigned int r_type; | |
1137 | unsigned int r_symndx; | |
1138 | Elf_Internal_Sym *isym; | |
1139 | struct elf_link_hash_entry *h; | |
1140 | struct elf_x86_link_hash_entry *eh; | |
1141 | bfd_vma offset; | |
1142 | bool resolved_to_zero; | |
1143 | bool need_copy_reloc_in_pie; | |
1144 | bool pc32_reloc; | |
1145 | asection *sec; | |
1146 | /* Offset must be a multiple of 2. */ | |
1147 | bool unaligned_offset = (irel->r_offset & 1) != 0; | |
1148 | /* True if there is a relative relocation against a dynamic | |
1149 | symbol. */ | |
1150 | bool dynamic_relative_reloc_p; | |
1151 | ||
1152 | /* Get the value of the symbol referred to by the reloc. */ | |
1153 | r_symndx = htab->r_sym (irel->r_info); | |
1154 | ||
1155 | r_type = ELF32_R_TYPE (irel->r_info); | |
1156 | /* Clear the R_X86_64_converted_reloc_bit bit. */ | |
1157 | r_type &= ~R_X86_64_converted_reloc_bit; | |
1158 | ||
1159 | sec = NULL; | |
1160 | h = NULL; | |
1161 | dynamic_relative_reloc_p = false; | |
1162 | ||
1163 | if (r_symndx < symtab_hdr->sh_info) | |
1164 | { | |
1165 | /* Read this BFD's local symbols. */ | |
1166 | if (isymbuf == NULL) | |
1167 | { | |
1168 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1169 | if (isymbuf == NULL) | |
d8bcb872 L |
1170 | { |
1171 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1172 | symtab_hdr->sh_info, | |
1173 | 0, NULL, NULL, NULL); | |
1174 | if (isymbuf == NULL) | |
1175 | goto error_return; | |
1176 | } | |
5af6f000 L |
1177 | } |
1178 | ||
1179 | isym = isymbuf + r_symndx; | |
1180 | switch (isym->st_shndx) | |
1181 | { | |
1182 | case SHN_ABS: | |
1183 | sec = bfd_abs_section_ptr; | |
1184 | break; | |
1185 | case SHN_COMMON: | |
1186 | sec = bfd_com_section_ptr; | |
1187 | break; | |
1188 | case SHN_X86_64_LCOMMON: | |
1189 | if (!is_x86_64) | |
1190 | abort (); | |
1191 | sec = &_bfd_elf_large_com_section; | |
1192 | break; | |
1193 | default: | |
1194 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1195 | break; | |
1196 | } | |
1197 | ||
1198 | /* Skip relocation against local STT_GNU_IFUNC symbol. */ | |
1199 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
1200 | continue; | |
1201 | ||
1202 | eh = (struct elf_x86_link_hash_entry *) h; | |
1203 | resolved_to_zero = false; | |
1204 | } | |
1205 | else | |
1206 | { | |
1207 | /* Get H and SEC for GENERATE_DYNAMIC_RELOCATION_P below. */ | |
1208 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1209 | while (h->root.type == bfd_link_hash_indirect | |
1210 | || h->root.type == bfd_link_hash_warning) | |
1211 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1212 | ||
1213 | if (h->root.type == bfd_link_hash_defined | |
1214 | || h->root.type == bfd_link_hash_defweak) | |
1215 | sec = h->root.u.def.section; | |
1216 | ||
1217 | /* Skip relocation against STT_GNU_IFUNC symbol. */ | |
1218 | if (h->type == STT_GNU_IFUNC) | |
1219 | continue; | |
1220 | ||
1221 | eh = (struct elf_x86_link_hash_entry *) h; | |
1222 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); | |
1223 | ||
1224 | /* NB: See how elf_backend_finish_dynamic_symbol is called | |
1225 | from elf_link_output_extsym. */ | |
1226 | if ((h->dynindx != -1 || h->forced_local) | |
1227 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1228 | || h->root.type != bfd_link_hash_undefweak) | |
1229 | || !h->forced_local) | |
1230 | && h->got.offset != (bfd_vma) -1 | |
1231 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type) | |
1232 | && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE | |
1233 | && !resolved_to_zero | |
1234 | && SYMBOL_REFERENCES_LOCAL_P (info, h) | |
1235 | && SYMBOL_DEFINED_NON_SHARED_P (h)) | |
1236 | dynamic_relative_reloc_p = true; | |
1237 | ||
1238 | isym = NULL; | |
1239 | } | |
1240 | ||
1241 | if (X86_GOT_TYPE_P (is_x86_64, r_type)) | |
1242 | { | |
1243 | /* Pack GOT relative relocations. There should be only a | |
1244 | single R_*_RELATIVE relocation in GOT. */ | |
1245 | if (eh != NULL) | |
1246 | { | |
1247 | if (eh->got_relative_reloc_done) | |
1248 | continue; | |
1249 | ||
1250 | if (!(dynamic_relative_reloc_p | |
1251 | || (RESOLVED_LOCALLY_P (info, h, htab) | |
1252 | && GENERATE_RELATIVE_RELOC_P (info, h)))) | |
1253 | continue; | |
1254 | ||
1255 | if (!dynamic_relative_reloc_p) | |
1256 | eh->no_finish_dynamic_symbol = 1; | |
1257 | eh->got_relative_reloc_done = 1; | |
1258 | offset = h->got.offset; | |
1259 | } | |
1260 | else | |
1261 | { | |
1262 | if (elf_x86_relative_reloc_done (abfd)[r_symndx]) | |
1263 | continue; | |
1264 | ||
1265 | if (!X86_LOCAL_GOT_RELATIVE_RELOC_P (is_x86_64, info, | |
1266 | isym)) | |
1267 | continue; | |
1268 | ||
1269 | elf_x86_relative_reloc_done (abfd)[r_symndx] = 1; | |
1270 | offset = local_got_offsets[r_symndx]; | |
1271 | } | |
1272 | ||
1273 | if (!elf_x86_relative_reloc_record_add (info, | |
1274 | &htab->relative_reloc, | |
1275 | irel, htab->elf.sgot, | |
d8bcb872 L |
1276 | sec, h, isym, offset, |
1277 | &keep_symbuf)) | |
5af6f000 L |
1278 | goto error_return; |
1279 | ||
1280 | continue; | |
1281 | } | |
1282 | ||
1283 | if (is_x86_64 | |
1284 | && irel->r_addend == 0 | |
1285 | && !ABI_64_P (info->output_bfd)) | |
1286 | { | |
1287 | /* For x32, if addend is zero, treat R_X86_64_64 like | |
1288 | R_X86_64_32 and R_X86_64_SIZE64 like R_X86_64_SIZE32. */ | |
1289 | if (r_type == R_X86_64_64) | |
1290 | r_type = R_X86_64_32; | |
1291 | else if (r_type == R_X86_64_SIZE64) | |
1292 | r_type = R_X86_64_SIZE32; | |
1293 | } | |
1294 | ||
1295 | if (!X86_RELATIVE_RELOC_TYPE_P (is_x86_64, r_type)) | |
1296 | continue; | |
1297 | ||
1298 | /* Pack non-GOT relative relocations. */ | |
1299 | if (is_x86_64) | |
1300 | { | |
1301 | need_copy_reloc_in_pie = | |
1302 | (bfd_link_pie (info) | |
1303 | && h != NULL | |
1304 | && (h->needs_copy | |
1305 | || eh->needs_copy | |
1306 | || (h->root.type == bfd_link_hash_undefined)) | |
1307 | && (X86_PCREL_TYPE_P (true, r_type) | |
1308 | || X86_SIZE_TYPE_P (true, r_type))); | |
1309 | pc32_reloc = false; | |
1310 | } | |
1311 | else | |
1312 | { | |
1313 | need_copy_reloc_in_pie = false; | |
1314 | pc32_reloc = r_type == R_386_PC32; | |
1315 | } | |
1316 | ||
1317 | if (GENERATE_DYNAMIC_RELOCATION_P (is_x86_64, info, eh, r_type, | |
1318 | sec, need_copy_reloc_in_pie, | |
1319 | resolved_to_zero, pc32_reloc)) | |
1320 | { | |
1321 | /* When generating a shared object, these relocations | |
1322 | are copied into the output file to be resolved at run | |
1323 | time. */ | |
1324 | offset = _bfd_elf_section_offset (info->output_bfd, info, | |
1325 | input_section, | |
1326 | irel->r_offset); | |
1327 | if (offset == (bfd_vma) -1 | |
1328 | || offset == (bfd_vma) -2 | |
1329 | || COPY_INPUT_RELOC_P (is_x86_64, info, h, r_type)) | |
1330 | continue; | |
1331 | ||
1332 | /* This symbol is local, or marked to become local. When | |
1333 | relocation overflow check is disabled, we convert | |
1334 | R_X86_64_32 to dynamic R_X86_64_RELATIVE. */ | |
1335 | if (is_x86_64 | |
1336 | && !(r_type == htab->pointer_r_type | |
1337 | || (r_type == R_X86_64_32 | |
1338 | && htab->params->no_reloc_overflow_check))) | |
1339 | continue; | |
1340 | ||
1341 | if (!elf_x86_relative_reloc_record_add | |
1342 | (info, | |
1343 | ((unaligned_section || unaligned_offset) | |
1344 | ? &htab->unaligned_relative_reloc | |
1345 | : &htab->relative_reloc), | |
d8bcb872 L |
1346 | irel, input_section, sec, h, isym, offset, |
1347 | &keep_symbuf)) | |
5af6f000 L |
1348 | goto error_return; |
1349 | } | |
1350 | } | |
1351 | ||
1352 | input_section->relative_reloc_packed = 1; | |
1353 | ||
d8bcb872 | 1354 | return_status = true; |
5af6f000 L |
1355 | |
1356 | error_return: | |
1357 | if ((unsigned char *) isymbuf != symtab_hdr->contents) | |
d8bcb872 L |
1358 | { |
1359 | /* Cache the symbol buffer if it must be kept. */ | |
1360 | if (keep_symbuf) | |
1361 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1362 | else | |
1363 | free (isymbuf); | |
1364 | } | |
5af6f000 L |
1365 | if (elf_section_data (input_section)->relocs != internal_relocs) |
1366 | free (internal_relocs); | |
d8bcb872 | 1367 | return return_status; |
5af6f000 L |
1368 | } |
1369 | ||
1370 | /* Add an entry to the 64-bit DT_RELR bitmap. */ | |
1371 | ||
1372 | static void | |
1373 | elf64_dt_relr_bitmap_add | |
1374 | (struct bfd_link_info *info, struct elf_dt_relr_bitmap *bitmap, | |
1375 | uint64_t entry) | |
1376 | { | |
1377 | bfd_size_type newidx; | |
1378 | ||
1379 | if (bitmap->u.elf64 == NULL) | |
1380 | { | |
1381 | bitmap->u.elf64 = bfd_malloc (sizeof (uint64_t)); | |
1382 | bitmap->count = 0; | |
1383 | bitmap->size = 1; | |
1384 | } | |
1385 | ||
1386 | newidx = bitmap->count++; | |
1387 | ||
1388 | if (bitmap->count > bitmap->size) | |
1389 | { | |
1390 | bitmap->size <<= 1; | |
1391 | bitmap->u.elf64 = bfd_realloc (bitmap->u.elf64, | |
1392 | (bitmap->size * sizeof (uint64_t))); | |
1393 | } | |
1394 | ||
1395 | if (bitmap->u.elf64 == NULL) | |
1396 | { | |
1397 | info->callbacks->einfo | |
1398 | /* xgettext:c-format */ | |
1399 | (_("%F%P: %pB: failed to allocate 64-bit DT_RELR bitmap\n"), | |
1400 | info->output_bfd); | |
1401 | } | |
1402 | ||
1403 | bitmap->u.elf64[newidx] = entry; | |
1404 | } | |
1405 | ||
1406 | /* Add an entry to the 32-bit DT_RELR bitmap. */ | |
1407 | ||
1408 | static void | |
1409 | elf32_dt_relr_bitmap_add | |
1410 | (struct bfd_link_info *info, struct elf_dt_relr_bitmap *bitmap, | |
1411 | uint32_t entry) | |
1412 | { | |
1413 | bfd_size_type newidx; | |
1414 | ||
1415 | if (bitmap->u.elf32 == NULL) | |
1416 | { | |
1417 | bitmap->u.elf32 = bfd_malloc (sizeof (uint32_t)); | |
1418 | bitmap->count = 0; | |
1419 | bitmap->size = 1; | |
1420 | } | |
1421 | ||
1422 | newidx = bitmap->count++; | |
1423 | ||
1424 | if (bitmap->count > bitmap->size) | |
1425 | { | |
1426 | bitmap->size <<= 1; | |
1427 | bitmap->u.elf32 = bfd_realloc (bitmap->u.elf32, | |
1428 | (bitmap->size * sizeof (uint32_t))); | |
1429 | } | |
1430 | ||
1431 | if (bitmap->u.elf32 == NULL) | |
1432 | { | |
1433 | info->callbacks->einfo | |
1434 | /* xgettext:c-format */ | |
1435 | (_("%F%P: %pB: failed to allocate 32-bit DT_RELR bitmap\n"), | |
1436 | info->output_bfd); | |
1437 | } | |
1438 | ||
1439 | bitmap->u.elf32[newidx] = entry; | |
1440 | } | |
1441 | ||
1442 | void | |
1443 | _bfd_elf32_write_addend (bfd *abfd, uint64_t value, void *addr) | |
1444 | { | |
1445 | bfd_put_32 (abfd, value, addr); | |
1446 | } | |
1447 | ||
1448 | void | |
1449 | _bfd_elf64_write_addend (bfd *abfd, uint64_t value, void *addr) | |
1450 | { | |
1451 | bfd_put_64 (abfd, value, addr); | |
1452 | } | |
1453 | ||
1454 | /* Size or finish relative relocations to determine the run-time | |
1455 | addresses for DT_RELR bitmap computation later. OUTREL is set | |
1456 | to NULL in the sizing phase and non-NULL in the finising phase | |
1457 | where the regular relative relocations will be written out. */ | |
1458 | ||
1459 | static void | |
1460 | elf_x86_size_or_finish_relative_reloc | |
1461 | (bool is_x86_64, struct bfd_link_info *info, | |
1462 | struct elf_x86_link_hash_table *htab, bool unaligned, | |
1463 | Elf_Internal_Rela *outrel) | |
1464 | { | |
1465 | unsigned int align_mask; | |
1466 | bfd_size_type i, count; | |
1467 | asection *sec, *srel; | |
1468 | struct elf_link_hash_entry *h; | |
1469 | bfd_vma offset; | |
1470 | Elf_Internal_Sym *sym; | |
1471 | asection *sym_sec; | |
1472 | asection *sgot = htab->elf.sgot; | |
1473 | asection *srelgot = htab->elf.srelgot; | |
1474 | struct elf_x86_relative_reloc_data *relative_reloc; | |
1475 | ||
1476 | if (unaligned) | |
1477 | { | |
1478 | align_mask = 0; | |
1479 | relative_reloc = &htab->unaligned_relative_reloc; | |
1480 | } | |
1481 | else | |
1482 | { | |
1483 | align_mask = 1; | |
1484 | relative_reloc = &htab->relative_reloc; | |
1485 | } | |
1486 | ||
1487 | count = relative_reloc->count; | |
1488 | for (i = 0; i < count; i++) | |
1489 | { | |
1490 | sec = relative_reloc->data[i].sec; | |
1491 | sym = relative_reloc->data[i].sym; | |
1492 | ||
1493 | /* If SYM is NULL, it must be a global symbol. */ | |
1494 | if (sym == NULL) | |
1495 | h = relative_reloc->data[i].u.h; | |
1496 | else | |
1497 | h = NULL; | |
1498 | ||
1499 | if (is_x86_64) | |
1500 | { | |
1501 | bfd_vma relocation; | |
1502 | /* This function may be called more than once and REL may be | |
1503 | updated by _bfd_elf_rela_local_sym below. */ | |
1504 | Elf_Internal_Rela rel = relative_reloc->data[i].rel; | |
1505 | ||
1506 | if (h != NULL) | |
1507 | { | |
1508 | if (h->root.type == bfd_link_hash_defined | |
1509 | || h->root.type == bfd_link_hash_defweak) | |
1510 | { | |
1511 | sym_sec = h->root.u.def.section; | |
1512 | relocation = (h->root.u.def.value | |
1513 | + sym_sec->output_section->vma | |
1514 | + sym_sec->output_offset); | |
1515 | } | |
1516 | else | |
1517 | { | |
a9e61227 L |
1518 | /* Allow undefined symbol only at the sizing phase. |
1519 | Otherwise skip undefined symbol here. Undefined | |
1520 | symbol will be reported by relocate_section. */ | |
5af6f000 L |
1521 | if (outrel == NULL) |
1522 | relocation = 0; | |
1523 | else | |
a9e61227 | 1524 | continue; |
5af6f000 L |
1525 | } |
1526 | } | |
1527 | else | |
1528 | { | |
1529 | sym_sec = relative_reloc->data[i].u.sym_sec; | |
1530 | relocation = _bfd_elf_rela_local_sym | |
1531 | (info->output_bfd, sym, &sym_sec, &rel); | |
1532 | } | |
1533 | ||
1534 | if (outrel != NULL) | |
1535 | { | |
1536 | outrel->r_addend = relocation; | |
1537 | if (sec == sgot) | |
1538 | { | |
1539 | if (h != NULL && h->needs_plt) | |
1540 | abort (); | |
1541 | } | |
1542 | else | |
1543 | outrel->r_addend += rel.r_addend; | |
1544 | ||
1545 | /* Write the implicit addend if ALIGN_MASK isn't 0. */ | |
1546 | if (align_mask) | |
1547 | { | |
1548 | if (sec == sgot) | |
1549 | { | |
1550 | if (relative_reloc->data[i].offset >= sec->size) | |
1551 | abort (); | |
1552 | htab->elf_write_addend_in_got | |
1553 | (info->output_bfd, outrel->r_addend, | |
1554 | sec->contents + relative_reloc->data[i].offset); | |
1555 | } | |
1556 | else | |
1557 | { | |
9eb71a53 L |
1558 | bfd_byte *contents; |
1559 | ||
5af6f000 L |
1560 | if (rel.r_offset >= sec->size) |
1561 | abort (); | |
9eb71a53 L |
1562 | |
1563 | if (elf_section_data (sec)->this_hdr.contents | |
1564 | != NULL) | |
1565 | contents | |
1566 | = elf_section_data (sec)->this_hdr.contents; | |
1567 | else | |
1568 | { | |
584b30e4 L |
1569 | if (!_bfd_elf_mmap_section_contents (sec->owner, |
1570 | sec, | |
1571 | &contents)) | |
9eb71a53 L |
1572 | info->callbacks->einfo |
1573 | /* xgettext:c-format */ | |
1574 | (_("%F%P: %pB: failed to allocate memory for section `%pA'\n"), | |
1575 | info->output_bfd, sec); | |
1576 | ||
1577 | /* Cache the section contents for | |
1578 | elf_link_input_bfd. */ | |
1579 | elf_section_data (sec)->this_hdr.contents | |
1580 | = contents; | |
1581 | } | |
5af6f000 L |
1582 | htab->elf_write_addend |
1583 | (info->output_bfd, outrel->r_addend, | |
9eb71a53 | 1584 | contents + rel.r_offset); |
5af6f000 L |
1585 | } |
1586 | } | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | if (sec == sgot) | |
1591 | srel = srelgot; | |
1592 | else | |
1593 | srel = elf_section_data (sec)->sreloc; | |
1594 | offset = (sec->output_section->vma + sec->output_offset | |
1595 | + relative_reloc->data[i].offset); | |
1596 | relative_reloc->data[i].address = offset; | |
1597 | if (outrel != NULL) | |
1598 | { | |
1599 | outrel->r_offset = offset; | |
1600 | ||
1601 | if ((outrel->r_offset & align_mask) != 0) | |
1602 | abort (); | |
1603 | ||
1604 | if (htab->params->report_relative_reloc) | |
1605 | _bfd_x86_elf_link_report_relative_reloc | |
1606 | (info, sec, h, sym, htab->relative_r_name, outrel); | |
1607 | ||
1608 | /* Generate regular relative relocation if ALIGN_MASK is 0. */ | |
1609 | if (align_mask == 0) | |
1610 | htab->elf_append_reloc (info->output_bfd, srel, outrel); | |
1611 | } | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | /* Compute the DT_RELR section size. Set NEED_PLAYOUT to true if | |
1616 | the DT_RELR section size has been increased. */ | |
1617 | ||
1618 | static void | |
1619 | elf_x86_compute_dl_relr_bitmap | |
1620 | (struct bfd_link_info *info, struct elf_x86_link_hash_table *htab, | |
1621 | bool *need_layout) | |
1622 | { | |
1623 | bfd_vma base; | |
1624 | bfd_size_type i, count, new_count; | |
1625 | struct elf_x86_relative_reloc_data *relative_reloc = | |
1626 | &htab->relative_reloc; | |
1627 | /* Save the old DT_RELR bitmap count. Don't shrink the DT_RELR bitmap | |
1628 | if the new DT_RELR bitmap count is smaller than the old one. Pad | |
1629 | with trailing 1s which won't be decoded to more relocations. */ | |
1630 | bfd_size_type dt_relr_bitmap_count = htab->dt_relr_bitmap.count; | |
1631 | ||
1632 | /* Clear the DT_RELR bitmap count. */ | |
1633 | htab->dt_relr_bitmap.count = 0; | |
1634 | ||
1635 | count = relative_reloc->count; | |
1636 | ||
1637 | if (ABI_64_P (info->output_bfd)) | |
1638 | { | |
1639 | /* Compute the 64-bit DT_RELR bitmap. */ | |
1640 | i = 0; | |
1641 | while (i < count) | |
1642 | { | |
1643 | if ((relative_reloc->data[i].address % 1) != 0) | |
1644 | abort (); | |
1645 | ||
1646 | elf64_dt_relr_bitmap_add (info, &htab->dt_relr_bitmap, | |
1647 | relative_reloc->data[i].address); | |
1648 | ||
1649 | base = relative_reloc->data[i].address + 8; | |
1650 | i++; | |
1651 | ||
1652 | while (i < count) | |
1653 | { | |
1654 | uint64_t bitmap = 0; | |
1655 | for (; i < count; i++) | |
1656 | { | |
1657 | bfd_vma delta = (relative_reloc->data[i].address | |
1658 | - base); | |
1659 | /* Stop if it is too far from base. */ | |
1660 | if (delta >= 63 * 8) | |
1661 | break; | |
1662 | /* Stop if it isn't a multiple of 8. */ | |
1663 | if ((delta % 8) != 0) | |
1664 | break; | |
1665 | bitmap |= 1ULL << (delta / 8); | |
1666 | } | |
1667 | ||
1668 | if (bitmap == 0) | |
1669 | break; | |
1670 | ||
1671 | elf64_dt_relr_bitmap_add (info, &htab->dt_relr_bitmap, | |
1672 | (bitmap << 1) | 1); | |
1673 | ||
1674 | base += 63 * 8; | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | new_count = htab->dt_relr_bitmap.count; | |
1679 | if (dt_relr_bitmap_count > new_count) | |
1680 | { | |
1681 | /* Don't shrink the DT_RELR section size to avoid section | |
1682 | layout oscillation. Instead, pad the DT_RELR bitmap with | |
1683 | 1s which do not decode to more relocations. */ | |
1684 | ||
1685 | htab->dt_relr_bitmap.count = dt_relr_bitmap_count; | |
1686 | count = dt_relr_bitmap_count - new_count; | |
1687 | for (i = 0; i < count; i++) | |
1688 | htab->dt_relr_bitmap.u.elf64[new_count + i] = 1; | |
1689 | } | |
1690 | } | |
1691 | else | |
1692 | { | |
1693 | /* Compute the 32-bit DT_RELR bitmap. */ | |
1694 | i = 0; | |
1695 | while (i < count) | |
1696 | { | |
1697 | if ((relative_reloc->data[i].address % 1) != 0) | |
1698 | abort (); | |
1699 | ||
1700 | elf32_dt_relr_bitmap_add (info, &htab->dt_relr_bitmap, | |
1701 | relative_reloc->data[i].address); | |
1702 | ||
1703 | base = relative_reloc->data[i].address + 4; | |
1704 | i++; | |
1705 | ||
1706 | while (i < count) | |
1707 | { | |
1708 | uint32_t bitmap = 0; | |
1709 | for (; i < count; i++) | |
1710 | { | |
1711 | bfd_vma delta = (relative_reloc->data[i].address | |
1712 | - base); | |
1713 | /* Stop if it is too far from base. */ | |
1714 | if (delta >= 31 * 4) | |
1715 | break; | |
1716 | /* Stop if it isn't a multiple of 4. */ | |
1717 | if ((delta % 4) != 0) | |
1718 | break; | |
1719 | bitmap |= 1ULL << (delta / 4); | |
1720 | } | |
1721 | ||
1722 | if (bitmap == 0) | |
1723 | break; | |
1724 | ||
1725 | elf32_dt_relr_bitmap_add (info, &htab->dt_relr_bitmap, | |
1726 | (bitmap << 1) | 1); | |
1727 | ||
1728 | base += 31 * 4; | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | new_count = htab->dt_relr_bitmap.count; | |
1733 | if (dt_relr_bitmap_count > new_count) | |
1734 | { | |
1735 | /* Don't shrink the DT_RELR section size to avoid section | |
1736 | layout oscillation. Instead, pad the DT_RELR bitmap with | |
1737 | 1s which do not decode to more relocations. */ | |
1738 | ||
1739 | htab->dt_relr_bitmap.count = dt_relr_bitmap_count; | |
1740 | count = dt_relr_bitmap_count - new_count; | |
1741 | for (i = 0; i < count; i++) | |
1742 | htab->dt_relr_bitmap.u.elf32[new_count + i] = 1; | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | if (htab->dt_relr_bitmap.count != dt_relr_bitmap_count) | |
1747 | { | |
1748 | if (need_layout) | |
1749 | { | |
1750 | /* The .relr.dyn section size is changed. Update the section | |
1751 | size and tell linker to layout sections again. */ | |
1752 | htab->elf.srelrdyn->size = | |
1753 | (htab->dt_relr_bitmap.count | |
1754 | * (ABI_64_P (info->output_bfd) ? 8 : 4)); | |
1755 | ||
1756 | *need_layout = true; | |
1757 | } | |
1758 | else | |
1759 | info->callbacks->einfo | |
1760 | /* xgettext:c-format */ | |
1761 | (_("%F%P: %pB: size of compact relative reloc section is " | |
1762 | "changed: new (%lu) != old (%lu)\n"), | |
1763 | info->output_bfd, htab->dt_relr_bitmap.count, | |
1764 | dt_relr_bitmap_count); | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | /* Write out the DT_RELR section. */ | |
1769 | ||
1770 | static void | |
1771 | elf_x86_write_dl_relr_bitmap (struct bfd_link_info *info, | |
1772 | struct elf_x86_link_hash_table *htab) | |
1773 | { | |
1774 | asection *sec = htab->elf.srelrdyn; | |
1775 | bfd_size_type size = sec->size; | |
1776 | bfd_size_type i; | |
1777 | unsigned char *contents; | |
1778 | ||
1779 | contents = (unsigned char *) bfd_alloc (sec->owner, size); | |
1780 | if (contents == NULL) | |
1781 | info->callbacks->einfo | |
1782 | /* xgettext:c-format */ | |
1783 | (_("%F%P: %pB: failed to allocate compact relative reloc section\n"), | |
1784 | info->output_bfd); | |
1785 | ||
1786 | /* Cache the section contents for elf_link_input_bfd. */ | |
1787 | sec->contents = contents; | |
1788 | ||
1789 | if (ABI_64_P (info->output_bfd)) | |
1790 | for (i = 0; i < htab->dt_relr_bitmap.count; i++, contents += 8) | |
1791 | bfd_put_64 (info->output_bfd, htab->dt_relr_bitmap.u.elf64[i], | |
1792 | contents); | |
1793 | else | |
1794 | for (i = 0; i < htab->dt_relr_bitmap.count; i++, contents += 4) | |
1795 | bfd_put_32 (info->output_bfd, htab->dt_relr_bitmap.u.elf32[i], | |
1796 | contents); | |
1797 | } | |
1798 | ||
1799 | /* Sort relative relocations by address. */ | |
1800 | ||
1801 | static int | |
1802 | elf_x86_relative_reloc_compare (const void *pa, const void *pb) | |
1803 | { | |
1804 | struct elf_x86_relative_reloc_record *a = | |
1805 | (struct elf_x86_relative_reloc_record *) pa; | |
1806 | struct elf_x86_relative_reloc_record *b = | |
1807 | (struct elf_x86_relative_reloc_record *) pb; | |
1808 | if (a->address < b->address) | |
1809 | return -1; | |
1810 | if (a->address > b->address) | |
1811 | return 1; | |
1812 | return 0; | |
1813 | } | |
1814 | ||
cf0e0a0b IB |
1815 | enum dynobj_sframe_plt_type |
1816 | { | |
1817 | SFRAME_PLT = 1, | |
1818 | SFRAME_PLT_SEC = 2 | |
1819 | }; | |
1820 | ||
53d8d3f0 | 1821 | /* Create SFrame stack trace info for the plt entries in the .plt section |
cf0e0a0b IB |
1822 | of type PLT_SEC_TYPE. */ |
1823 | ||
1824 | static bool | |
1825 | _bfd_x86_elf_create_sframe_plt (bfd *output_bfd, | |
1826 | struct bfd_link_info *info, | |
1827 | unsigned int plt_sec_type) | |
1828 | { | |
1829 | struct elf_x86_link_hash_table *htab; | |
1830 | const struct elf_backend_data *bed; | |
1831 | ||
1832 | bool plt0_generated_p; | |
1833 | unsigned int plt0_entry_size; | |
1834 | unsigned char func_info; | |
49e4485c | 1835 | uint32_t fre_type; |
53d8d3f0 | 1836 | /* The dynamic plt section for which .sframe stack trace information is being |
cf0e0a0b IB |
1837 | created. */ |
1838 | asection *dpltsec; | |
1839 | ||
1840 | int err = 0; | |
1841 | ||
1842 | sframe_encoder_ctx **ectx = NULL; | |
1843 | unsigned plt_entry_size = 0; | |
1844 | unsigned int num_pltn_fres = 0; | |
1845 | unsigned int num_pltn_entries = 0; | |
1846 | ||
1847 | bed = get_elf_backend_data (output_bfd); | |
1848 | htab = elf_x86_hash_table (info, bed->target_id); | |
53d8d3f0 | 1849 | /* Whether SFrame stack trace info for plt0 is to be generated. */ |
cf0e0a0b IB |
1850 | plt0_generated_p = htab->plt.has_plt0; |
1851 | plt0_entry_size | |
1852 | = (plt0_generated_p) ? htab->sframe_plt->plt0_entry_size : 0; | |
1853 | ||
1854 | switch (plt_sec_type) | |
1855 | { | |
1856 | case SFRAME_PLT: | |
1857 | { | |
1858 | ectx = &htab->plt_cfe_ctx; | |
1859 | dpltsec = htab->elf.splt; | |
1860 | ||
1861 | plt_entry_size = htab->plt.plt_entry_size; | |
1862 | num_pltn_fres = htab->sframe_plt->pltn_num_fres; | |
1863 | num_pltn_entries | |
7922c426 | 1864 | = (dpltsec->size - plt0_entry_size) / plt_entry_size; |
cf0e0a0b IB |
1865 | |
1866 | break; | |
1867 | } | |
1868 | case SFRAME_PLT_SEC: | |
1869 | { | |
1870 | ectx = &htab->plt_second_cfe_ctx; | |
1871 | /* FIXME - this or htab->plt_second_sframe ? */ | |
1872 | dpltsec = htab->plt_second_eh_frame; | |
1873 | ||
1874 | plt_entry_size = htab->sframe_plt->sec_pltn_entry_size; | |
1875 | num_pltn_fres = htab->sframe_plt->sec_pltn_num_fres; | |
7922c426 | 1876 | num_pltn_entries = dpltsec->size / plt_entry_size; |
cf0e0a0b IB |
1877 | break; |
1878 | } | |
1879 | default: | |
1880 | /* No other value is possible. */ | |
1881 | return false; | |
1882 | break; | |
1883 | } | |
1884 | ||
ce9a8725 | 1885 | *ectx = sframe_encode (SFRAME_VERSION_2, |
cf0e0a0b IB |
1886 | 0, |
1887 | SFRAME_ABI_AMD64_ENDIAN_LITTLE, | |
1888 | SFRAME_CFA_FIXED_FP_INVALID, | |
1889 | -8, /* Fixed RA offset. */ | |
1890 | &err); | |
1891 | ||
1892 | /* FRE type is dependent on the size of the function. */ | |
1893 | fre_type = sframe_calc_fre_type (dpltsec->size); | |
b659fb35 | 1894 | func_info = sframe_fde_create_func_info (fre_type, SFRAME_FDE_TYPE_PCINC); |
cf0e0a0b IB |
1895 | |
1896 | /* Add SFrame FDE and the associated FREs for plt0 if plt0 has been | |
1897 | generated. */ | |
1898 | if (plt0_generated_p) | |
1899 | { | |
1900 | /* Add SFrame FDE for plt0, the function start address is updated later | |
1901 | at _bfd_elf_merge_section_sframe time. */ | |
ce9a8725 IB |
1902 | sframe_encoder_add_funcdesc_v2 (*ectx, |
1903 | 0, /* func start addr. */ | |
1904 | plt0_entry_size, | |
1905 | func_info, | |
1906 | 16, | |
1907 | 0 /* Num FREs. */); | |
cf0e0a0b IB |
1908 | sframe_frame_row_entry plt0_fre; |
1909 | unsigned int num_plt0_fres = htab->sframe_plt->plt0_num_fres; | |
1910 | for (unsigned int j = 0; j < num_plt0_fres; j++) | |
1911 | { | |
1912 | plt0_fre = *(htab->sframe_plt->plt0_fres[j]); | |
1913 | sframe_encoder_add_fre (*ectx, 0, &plt0_fre); | |
1914 | } | |
1915 | } | |
1916 | ||
1917 | ||
1918 | if (num_pltn_entries) | |
1919 | { | |
1920 | /* pltn entries use an SFrame FDE of type | |
1921 | SFRAME_FDE_TYPE_PCMASK to exploit the repetitive | |
1922 | pattern of the instructions in these entries. Using this SFrame FDE | |
53d8d3f0 | 1923 | type helps in keeping the SFrame stack trace info for pltn entries |
cf0e0a0b | 1924 | compact. */ |
b659fb35 IB |
1925 | func_info = sframe_fde_create_func_info (fre_type, |
1926 | SFRAME_FDE_TYPE_PCMASK); | |
cf0e0a0b IB |
1927 | /* Add the SFrame FDE for all PCs starting at the first pltn entry (hence, |
1928 | function start address = plt0_entry_size. As usual, this will be | |
1929 | updated later at _bfd_elf_merge_section_sframe, by when the | |
1930 | sections are relocated. */ | |
ce9a8725 IB |
1931 | sframe_encoder_add_funcdesc_v2 (*ectx, |
1932 | plt0_entry_size, /* func start addr. */ | |
1933 | dpltsec->size - plt0_entry_size, | |
1934 | func_info, | |
1935 | 16, | |
1936 | 0 /* Num FREs. */); | |
cf0e0a0b IB |
1937 | |
1938 | sframe_frame_row_entry pltn_fre; | |
1939 | /* Now add the FREs for pltn. Simply adding the two FREs suffices due | |
1940 | to the usage of SFRAME_FDE_TYPE_PCMASK above. */ | |
1941 | for (unsigned int j = 0; j < num_pltn_fres; j++) | |
1942 | { | |
1943 | pltn_fre = *(htab->sframe_plt->pltn_fres[j]); | |
1944 | sframe_encoder_add_fre (*ectx, 1, &pltn_fre); | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | return true; | |
1949 | } | |
1950 | ||
1951 | /* Put contents of the .sframe section corresponding to the specified | |
1952 | PLT_SEC_TYPE. */ | |
1953 | ||
1954 | static bool | |
1955 | _bfd_x86_elf_write_sframe_plt (bfd *output_bfd, | |
1956 | struct bfd_link_info *info, | |
1957 | unsigned int plt_sec_type) | |
1958 | { | |
1959 | struct elf_x86_link_hash_table *htab; | |
1960 | const struct elf_backend_data *bed; | |
1961 | sframe_encoder_ctx *ectx; | |
1962 | size_t sec_size; | |
1963 | asection *sec; | |
1964 | bfd *dynobj; | |
1965 | ||
1966 | int err = 0; | |
1967 | ||
1968 | bed = get_elf_backend_data (output_bfd); | |
1969 | htab = elf_x86_hash_table (info, bed->target_id); | |
1970 | dynobj = htab->elf.dynobj; | |
1971 | ||
1972 | switch (plt_sec_type) | |
1973 | { | |
1974 | case SFRAME_PLT: | |
1975 | ectx = htab->plt_cfe_ctx; | |
1976 | sec = htab->plt_sframe; | |
1977 | break; | |
1978 | case SFRAME_PLT_SEC: | |
1979 | ectx = htab->plt_second_cfe_ctx; | |
1980 | sec = htab->plt_second_sframe; | |
1981 | break; | |
1982 | default: | |
1983 | /* No other value is possible. */ | |
1984 | return false; | |
1985 | break; | |
1986 | } | |
1987 | ||
1988 | BFD_ASSERT (ectx); | |
1989 | ||
1990 | void *contents = sframe_encoder_write (ectx, &sec_size, &err); | |
1991 | ||
1992 | sec->size = (bfd_size_type) sec_size; | |
1993 | sec->contents = (unsigned char *) bfd_zalloc (dynobj, sec->size); | |
1994 | memcpy (sec->contents, contents, sec_size); | |
1995 | ||
1996 | sframe_encoder_free (&ectx); | |
1997 | ||
1998 | return true; | |
1999 | } | |
2000 | ||
5af6f000 L |
2001 | bool |
2002 | _bfd_elf_x86_size_relative_relocs (struct bfd_link_info *info, | |
2003 | bool *need_layout) | |
2004 | { | |
2005 | struct elf_x86_link_hash_table *htab; | |
2006 | const struct elf_backend_data *bed; | |
2007 | bool is_x86_64; | |
2008 | bfd_size_type i, count, unaligned_count; | |
2009 | asection *sec, *srel; | |
2010 | ||
2011 | /* Do nothing for ld -r. */ | |
2012 | if (bfd_link_relocatable (info)) | |
2013 | return true; | |
2014 | ||
2015 | bed = get_elf_backend_data (info->output_bfd); | |
2016 | htab = elf_x86_hash_table (info, bed->target_id); | |
2017 | if (htab == NULL) | |
2018 | return false; | |
2019 | ||
2020 | count = htab->relative_reloc.count; | |
2021 | unaligned_count = htab->unaligned_relative_reloc.count; | |
2022 | if (count == 0) | |
2023 | { | |
2024 | if (htab->generate_relative_reloc_pass == 0 | |
2025 | && htab->elf.srelrdyn != NULL) | |
2026 | { | |
2027 | /* Remove the empty .relr.dyn sections now. */ | |
2028 | if (!bfd_is_abs_section (htab->elf.srelrdyn->output_section)) | |
2029 | { | |
2030 | bfd_section_list_remove | |
2031 | (info->output_bfd, htab->elf.srelrdyn->output_section); | |
2032 | info->output_bfd->section_count--; | |
2033 | } | |
2034 | bfd_section_list_remove (htab->elf.srelrdyn->owner, | |
2035 | htab->elf.srelrdyn); | |
2036 | htab->elf.srelrdyn->owner->section_count--; | |
2037 | } | |
2038 | if (unaligned_count == 0) | |
2039 | { | |
2040 | htab->generate_relative_reloc_pass++; | |
2041 | return true; | |
2042 | } | |
2043 | } | |
2044 | ||
2045 | is_x86_64 = bed->target_id == X86_64_ELF_DATA; | |
2046 | ||
2047 | /* Size relative relocations. */ | |
2048 | if (htab->generate_relative_reloc_pass) | |
2049 | { | |
2050 | /* Reset the regular relative relocation count. */ | |
2051 | for (i = 0; i < unaligned_count; i++) | |
2052 | { | |
2053 | sec = htab->unaligned_relative_reloc.data[i].sec; | |
2054 | srel = elf_section_data (sec)->sreloc; | |
2055 | srel->reloc_count = 0; | |
2056 | } | |
2057 | } | |
2058 | else | |
2059 | { | |
2060 | /* Remove the reserved space for compact relative relocations. */ | |
2061 | if (count) | |
2062 | { | |
2063 | asection *sgot = htab->elf.sgot; | |
2064 | asection *srelgot = htab->elf.srelgot; | |
2065 | ||
2066 | for (i = 0; i < count; i++) | |
2067 | { | |
2068 | sec = htab->relative_reloc.data[i].sec; | |
2069 | if (sec == sgot) | |
2070 | srel = srelgot; | |
2071 | else | |
2072 | srel = elf_section_data (sec)->sreloc; | |
2073 | srel->size -= htab->sizeof_reloc; | |
2074 | } | |
2075 | } | |
2076 | } | |
2077 | ||
2078 | /* Size unaligned relative relocations. */ | |
2079 | if (unaligned_count) | |
2080 | elf_x86_size_or_finish_relative_reloc (is_x86_64, info, htab, | |
2081 | true, NULL); | |
2082 | ||
2083 | if (count) | |
2084 | { | |
2085 | elf_x86_size_or_finish_relative_reloc (is_x86_64, info, htab, | |
2086 | false, NULL); | |
2087 | ||
2088 | /* Sort relative relocations by addresses. We only need to | |
2089 | sort them in the first pass since the relative positions | |
2090 | won't change. */ | |
2091 | if (htab->generate_relative_reloc_pass == 0) | |
2092 | qsort (htab->relative_reloc.data, count, | |
2093 | sizeof (struct elf_x86_relative_reloc_record), | |
2094 | elf_x86_relative_reloc_compare); | |
2095 | ||
2096 | elf_x86_compute_dl_relr_bitmap (info, htab, need_layout); | |
2097 | } | |
2098 | ||
2099 | htab->generate_relative_reloc_pass++; | |
2100 | ||
2101 | return true; | |
2102 | } | |
2103 | ||
2104 | bool | |
2105 | _bfd_elf_x86_finish_relative_relocs (struct bfd_link_info *info) | |
2106 | { | |
2107 | struct elf_x86_link_hash_table *htab; | |
2108 | const struct elf_backend_data *bed; | |
2109 | Elf_Internal_Rela outrel; | |
2110 | bool is_x86_64; | |
2111 | bfd_size_type count; | |
2112 | ||
2113 | /* Do nothing for ld -r. */ | |
2114 | if (bfd_link_relocatable (info)) | |
2115 | return true; | |
2116 | ||
2117 | bed = get_elf_backend_data (info->output_bfd); | |
2118 | htab = elf_x86_hash_table (info, bed->target_id); | |
2119 | if (htab == NULL) | |
2120 | return false; | |
2121 | ||
2122 | is_x86_64 = bed->target_id == X86_64_ELF_DATA; | |
2123 | ||
2124 | outrel.r_info = htab->r_info (0, htab->relative_r_type); | |
2125 | ||
2126 | if (htab->unaligned_relative_reloc.count) | |
2127 | elf_x86_size_or_finish_relative_reloc (is_x86_64, info, htab, | |
2128 | true, &outrel); | |
2129 | ||
2130 | count = htab->relative_reloc.count; | |
2131 | if (count) | |
2132 | { | |
2133 | elf_x86_size_or_finish_relative_reloc (is_x86_64, info, htab, | |
2134 | false, &outrel); | |
2135 | ||
2136 | elf_x86_compute_dl_relr_bitmap (info, htab, NULL); | |
2137 | ||
2138 | elf_x86_write_dl_relr_bitmap (info, htab); | |
2139 | } | |
2140 | ||
2141 | return true; | |
2142 | } | |
2143 | ||
0a1b45a2 | 2144 | bool |
382aae06 L |
2145 | _bfd_elf_x86_valid_reloc_p (asection *input_section, |
2146 | struct bfd_link_info *info, | |
2147 | struct elf_x86_link_hash_table *htab, | |
2148 | const Elf_Internal_Rela *rel, | |
2149 | struct elf_link_hash_entry *h, | |
2150 | Elf_Internal_Sym *sym, | |
2151 | Elf_Internal_Shdr *symtab_hdr, | |
0a1b45a2 | 2152 | bool *no_dynreloc_p) |
382aae06 | 2153 | { |
0a1b45a2 | 2154 | bool valid_p = true; |
382aae06 | 2155 | |
0a1b45a2 | 2156 | *no_dynreloc_p = false; |
382aae06 L |
2157 | |
2158 | /* Check If relocation against non-preemptible absolute symbol is | |
2159 | valid in PIC. FIXME: Can't use SYMBOL_REFERENCES_LOCAL_P since | |
2160 | it may call _bfd_elf_link_hide_sym_by_version and result in | |
2161 | ld-elfvers/ vers21 test failure. */ | |
2162 | if (bfd_link_pic (info) | |
2163 | && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, h))) | |
2164 | { | |
2165 | const struct elf_backend_data *bed; | |
2166 | unsigned int r_type; | |
2167 | Elf_Internal_Rela irel; | |
2168 | ||
2169 | /* Skip non-absolute symbol. */ | |
2170 | if (h) | |
2171 | { | |
2172 | if (!ABS_SYMBOL_P (h)) | |
2173 | return valid_p; | |
2174 | } | |
2175 | else if (sym->st_shndx != SHN_ABS) | |
2176 | return valid_p; | |
2177 | ||
2178 | bed = get_elf_backend_data (input_section->owner); | |
2179 | r_type = ELF32_R_TYPE (rel->r_info); | |
2180 | irel = *rel; | |
2181 | ||
2182 | /* Only allow relocations against absolute symbol, which can be | |
30a95452 L |
2183 | resolved as absolute value + addend. GOTPCREL and GOT32 |
2184 | relocations are allowed since absolute value + addend is | |
2185 | stored in the GOT slot. */ | |
382aae06 L |
2186 | if (bed->target_id == X86_64_ELF_DATA) |
2187 | { | |
2188 | r_type &= ~R_X86_64_converted_reloc_bit; | |
2189 | valid_p = (r_type == R_X86_64_64 | |
2190 | || r_type == R_X86_64_32 | |
2191 | || r_type == R_X86_64_32S | |
2192 | || r_type == R_X86_64_16 | |
2193 | || r_type == R_X86_64_8 | |
2194 | || r_type == R_X86_64_GOTPCREL | |
2195 | || r_type == R_X86_64_GOTPCRELX | |
2196 | || r_type == R_X86_64_REX_GOTPCRELX); | |
2197 | if (!valid_p) | |
2198 | { | |
2199 | unsigned int r_symndx = htab->r_sym (rel->r_info); | |
2200 | irel.r_info = htab->r_info (r_symndx, r_type); | |
2201 | } | |
2202 | } | |
2203 | else | |
2204 | valid_p = (r_type == R_386_32 | |
2205 | || r_type == R_386_16 | |
30a95452 L |
2206 | || r_type == R_386_8 |
2207 | || r_type == R_386_GOT32 | |
2208 | || r_type == R_386_GOT32X); | |
382aae06 L |
2209 | |
2210 | if (valid_p) | |
0a1b45a2 | 2211 | *no_dynreloc_p = true; |
382aae06 L |
2212 | else |
2213 | { | |
2214 | const char *name; | |
2215 | arelent internal_reloc; | |
2216 | ||
2217 | if (!bed->elf_info_to_howto (input_section->owner, | |
2218 | &internal_reloc, &irel) | |
2219 | || internal_reloc.howto == NULL) | |
2220 | abort (); | |
2221 | ||
2222 | if (h) | |
2223 | name = h->root.root.string; | |
2224 | else | |
2225 | name = bfd_elf_sym_name (input_section->owner, symtab_hdr, | |
2226 | sym, NULL); | |
2227 | info->callbacks->einfo | |
2228 | /* xgettext:c-format */ | |
2229 | (_("%F%P: %pB: relocation %s against absolute symbol " | |
2230 | "`%s' in section `%pA' is disallowed\n"), | |
2231 | input_section->owner, internal_reloc.howto->name, name, | |
2232 | input_section); | |
2233 | bfd_set_error (bfd_error_bad_value); | |
2234 | } | |
2235 | } | |
2236 | ||
2237 | return valid_p; | |
2238 | } | |
2239 | ||
5e2ac45d L |
2240 | /* Set the sizes of the dynamic sections. */ |
2241 | ||
0a1b45a2 | 2242 | bool |
af969b14 | 2243 | _bfd_x86_elf_late_size_sections (bfd *output_bfd, |
5e2ac45d L |
2244 | struct bfd_link_info *info) |
2245 | { | |
2246 | struct elf_x86_link_hash_table *htab; | |
2247 | bfd *dynobj; | |
2248 | asection *s; | |
0a1b45a2 | 2249 | bool relocs; |
5e2ac45d L |
2250 | bfd *ibfd; |
2251 | const struct elf_backend_data *bed | |
2252 | = get_elf_backend_data (output_bfd); | |
2253 | ||
2254 | htab = elf_x86_hash_table (info, bed->target_id); | |
2255 | if (htab == NULL) | |
0a1b45a2 | 2256 | return false; |
5e2ac45d L |
2257 | dynobj = htab->elf.dynobj; |
2258 | if (dynobj == NULL) | |
af969b14 | 2259 | return true; |
5e2ac45d L |
2260 | |
2261 | /* Set up .got offsets for local syms, and space for local dynamic | |
2262 | relocs. */ | |
2263 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
2264 | { | |
2265 | bfd_signed_vma *local_got; | |
2266 | bfd_signed_vma *end_local_got; | |
2267 | char *local_tls_type; | |
2268 | bfd_vma *local_tlsdesc_gotent; | |
2269 | bfd_size_type locsymcount; | |
2270 | Elf_Internal_Shdr *symtab_hdr; | |
2271 | asection *srel; | |
2272 | ||
2273 | if (! is_x86_elf (ibfd, htab)) | |
2274 | continue; | |
2275 | ||
2276 | for (s = ibfd->sections; s != NULL; s = s->next) | |
2277 | { | |
2278 | struct elf_dyn_relocs *p; | |
2279 | ||
5e2ac45d L |
2280 | for (p = ((struct elf_dyn_relocs *) |
2281 | elf_section_data (s)->local_dynrel); | |
2282 | p != NULL; | |
2283 | p = p->next) | |
2284 | { | |
2285 | if (!bfd_is_abs_section (p->sec) | |
2286 | && bfd_is_abs_section (p->sec->output_section)) | |
2287 | { | |
2288 | /* Input section has been discarded, either because | |
2289 | it is a copy of a linkonce section or due to | |
2290 | linker script /DISCARD/, so we'll be discarding | |
2291 | the relocs too. */ | |
2292 | } | |
90c14f0c | 2293 | else if (htab->elf.target_os == is_vxworks |
5e2ac45d L |
2294 | && strcmp (p->sec->output_section->name, |
2295 | ".tls_vars") == 0) | |
2296 | { | |
2297 | /* Relocations in vxworks .tls_vars sections are | |
2298 | handled specially by the loader. */ | |
2299 | } | |
2300 | else if (p->count != 0) | |
2301 | { | |
2302 | srel = elf_section_data (p->sec)->sreloc; | |
2303 | srel->size += p->count * htab->sizeof_reloc; | |
2304 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 | |
2305 | && (info->flags & DF_TEXTREL) == 0) | |
2306 | { | |
2307 | info->flags |= DF_TEXTREL; | |
a6dbf402 | 2308 | if (bfd_link_textrel_check (info)) |
5e2ac45d | 2309 | /* xgettext:c-format */ |
826c3f1e | 2310 | info->callbacks->einfo |
871b3ab2 AM |
2311 | (_("%P: %pB: warning: relocation " |
2312 | "in read-only section `%pA'\n"), | |
826c3f1e | 2313 | p->sec->owner, p->sec); |
5e2ac45d L |
2314 | } |
2315 | } | |
2316 | } | |
2317 | } | |
2318 | ||
2319 | local_got = elf_local_got_refcounts (ibfd); | |
2320 | if (!local_got) | |
2321 | continue; | |
2322 | ||
2323 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
2324 | locsymcount = symtab_hdr->sh_info; | |
2325 | end_local_got = local_got + locsymcount; | |
2326 | local_tls_type = elf_x86_local_got_tls_type (ibfd); | |
2327 | local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd); | |
2328 | s = htab->elf.sgot; | |
2329 | srel = htab->elf.srelgot; | |
2330 | for (; local_got < end_local_got; | |
2331 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
2332 | { | |
2333 | *local_tlsdesc_gotent = (bfd_vma) -1; | |
2334 | if (*local_got > 0) | |
2335 | { | |
2336 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2337 | { | |
2338 | *local_tlsdesc_gotent = htab->elf.sgotplt->size | |
2339 | - elf_x86_compute_jump_table_size (htab); | |
2340 | htab->elf.sgotplt->size += 2 * htab->got_entry_size; | |
2341 | *local_got = (bfd_vma) -2; | |
2342 | } | |
2343 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2344 | || GOT_TLS_GD_P (*local_tls_type)) | |
2345 | { | |
2346 | *local_got = s->size; | |
2347 | s->size += htab->got_entry_size; | |
2348 | if (GOT_TLS_GD_P (*local_tls_type) | |
2349 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
2350 | s->size += htab->got_entry_size; | |
2351 | } | |
382aae06 | 2352 | if ((bfd_link_pic (info) && *local_tls_type != GOT_ABS) |
5e2ac45d L |
2353 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
2354 | || (*local_tls_type & GOT_TLS_IE)) | |
2355 | { | |
2356 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
2357 | srel->size += 2 * htab->sizeof_reloc; | |
2358 | else if (GOT_TLS_GD_P (*local_tls_type) | |
2359 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
2360 | srel->size += htab->sizeof_reloc; | |
2361 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2362 | { | |
2363 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
2364 | if (bed->target_id == X86_64_ELF_DATA) | |
9bcc30e4 | 2365 | htab->elf.tlsdesc_plt = (bfd_vma) -1; |
5e2ac45d L |
2366 | } |
2367 | } | |
2368 | } | |
2369 | else | |
2370 | *local_got = (bfd_vma) -1; | |
2371 | } | |
2372 | } | |
2373 | ||
2374 | if (htab->tls_ld_or_ldm_got.refcount > 0) | |
2375 | { | |
2376 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
07d6d2b8 | 2377 | or R_X86_64_TLSLD relocs. */ |
5e2ac45d L |
2378 | htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size; |
2379 | htab->elf.sgot->size += 2 * htab->got_entry_size; | |
2380 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
2381 | } | |
2382 | else | |
2383 | htab->tls_ld_or_ldm_got.offset = -1; | |
2384 | ||
2385 | /* Allocate global sym .plt and .got entries, and space for global | |
2386 | sym dynamic relocs. */ | |
2387 | elf_link_hash_traverse (&htab->elf, elf_x86_allocate_dynrelocs, | |
2388 | info); | |
2389 | ||
2390 | /* Allocate .plt and .got entries, and space for local symbols. */ | |
2391 | htab_traverse (htab->loc_hash_table, elf_x86_allocate_local_dynreloc, | |
2392 | info); | |
2393 | ||
2394 | /* For every jump slot reserved in the sgotplt, reloc_count is | |
2395 | incremented. However, when we reserve space for TLS descriptors, | |
2396 | it's not incremented, so in order to compute the space reserved | |
2397 | for them, it suffices to multiply the reloc count by the jump | |
2398 | slot size. | |
2399 | ||
2400 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
2401 | so that R_{386,X86_64}_IRELATIVE entries come last. */ | |
2402 | if (htab->elf.srelplt) | |
2403 | { | |
2404 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
2405 | htab->sgotplt_jump_table_size | |
2406 | = elf_x86_compute_jump_table_size (htab); | |
2407 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
2408 | } | |
2409 | else if (htab->elf.irelplt) | |
2410 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
2411 | ||
9bcc30e4 | 2412 | if (htab->elf.tlsdesc_plt) |
5e2ac45d L |
2413 | { |
2414 | /* NB: tlsdesc_plt is set only for x86-64. If we're not using | |
2415 | lazy TLS relocations, don't generate the PLT and GOT entries | |
2416 | they require. */ | |
2417 | if ((info->flags & DF_BIND_NOW)) | |
9bcc30e4 | 2418 | htab->elf.tlsdesc_plt = 0; |
5e2ac45d L |
2419 | else |
2420 | { | |
9bcc30e4 | 2421 | htab->elf.tlsdesc_got = htab->elf.sgot->size; |
5e2ac45d L |
2422 | htab->elf.sgot->size += htab->got_entry_size; |
2423 | /* Reserve room for the initial entry. | |
2424 | FIXME: we could probably do away with it in this case. */ | |
2425 | if (htab->elf.splt->size == 0) | |
2426 | htab->elf.splt->size = htab->plt.plt_entry_size; | |
9bcc30e4 | 2427 | htab->elf.tlsdesc_plt = htab->elf.splt->size; |
5e2ac45d L |
2428 | htab->elf.splt->size += htab->plt.plt_entry_size; |
2429 | } | |
2430 | } | |
2431 | ||
2432 | if (htab->elf.sgotplt) | |
2433 | { | |
2434 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
2435 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ | |
2436 | if ((htab->elf.hgot == NULL | |
cd048363 | 2437 | || !htab->got_referenced) |
5e2ac45d L |
2438 | && (htab->elf.sgotplt->size == bed->got_header_size) |
2439 | && (htab->elf.splt == NULL | |
2440 | || htab->elf.splt->size == 0) | |
2441 | && (htab->elf.sgot == NULL | |
2442 | || htab->elf.sgot->size == 0) | |
2443 | && (htab->elf.iplt == NULL | |
2444 | || htab->elf.iplt->size == 0) | |
2445 | && (htab->elf.igotplt == NULL | |
2446 | || htab->elf.igotplt->size == 0)) | |
cd048363 L |
2447 | { |
2448 | htab->elf.sgotplt->size = 0; | |
3b4c3844 L |
2449 | /* Solaris requires to keep _GLOBAL_OFFSET_TABLE_ even if it |
2450 | isn't used. */ | |
90c14f0c L |
2451 | if (htab->elf.hgot != NULL |
2452 | && htab->elf.target_os != is_solaris) | |
cd048363 L |
2453 | { |
2454 | /* Remove the unused _GLOBAL_OFFSET_TABLE_ from symbol | |
2455 | table. */ | |
2456 | htab->elf.hgot->root.type = bfd_link_hash_undefined; | |
2457 | htab->elf.hgot->root.u.undef.abfd | |
2458 | = htab->elf.hgot->root.u.def.section->owner; | |
2459 | htab->elf.hgot->root.linker_def = 0; | |
2460 | htab->elf.hgot->ref_regular = 0; | |
2461 | htab->elf.hgot->def_regular = 0; | |
2462 | } | |
2463 | } | |
5e2ac45d L |
2464 | } |
2465 | ||
2466 | if (_bfd_elf_eh_frame_present (info)) | |
2467 | { | |
2468 | if (htab->plt_eh_frame != NULL | |
2469 | && htab->elf.splt != NULL | |
2470 | && htab->elf.splt->size != 0 | |
2471 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
2472 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; | |
2473 | ||
2474 | if (htab->plt_got_eh_frame != NULL | |
2475 | && htab->plt_got != NULL | |
2476 | && htab->plt_got->size != 0 | |
2477 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
2478 | htab->plt_got_eh_frame->size | |
2479 | = htab->non_lazy_plt->eh_frame_plt_size; | |
2480 | ||
2481 | /* Unwind info for the second PLT and .plt.got sections are | |
2482 | identical. */ | |
2483 | if (htab->plt_second_eh_frame != NULL | |
2484 | && htab->plt_second != NULL | |
2485 | && htab->plt_second->size != 0 | |
2486 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
2487 | htab->plt_second_eh_frame->size | |
2488 | = htab->non_lazy_plt->eh_frame_plt_size; | |
2489 | } | |
2490 | ||
cf0e0a0b IB |
2491 | /* No need to size the .sframe section explicitly because the write-out |
2492 | mechanism is different. Simply prep up the FDE/FRE for the | |
2493 | .plt section. */ | |
2494 | if (_bfd_elf_sframe_present (info)) | |
2495 | { | |
2496 | if (htab->plt_sframe != NULL | |
2497 | && htab->elf.splt != NULL | |
2498 | && htab->elf.splt->size != 0 | |
2499 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
2500 | { | |
2501 | _bfd_x86_elf_create_sframe_plt (output_bfd, info, SFRAME_PLT); | |
2502 | /* FIXME - Dirty Hack. Set the size to something non-zero for now, | |
2503 | so that the section does not get stripped out below. The precise | |
2504 | size of this section is known only when the contents are | |
2505 | serialized in _bfd_x86_elf_write_sframe_plt. */ | |
2506 | htab->plt_sframe->size = sizeof (sframe_header) + 1; | |
2507 | } | |
2508 | ||
7922c426 | 2509 | /* FIXME - generate for .plt.got ? */ |
cf0e0a0b | 2510 | |
cf0e0a0b IB |
2511 | if (htab->plt_second_sframe != NULL |
2512 | && htab->plt_second != NULL | |
2513 | && htab->plt_second->size != 0 | |
2514 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
2515 | { | |
7922c426 IB |
2516 | /* SFrame stack trace info for the second PLT. */ |
2517 | _bfd_x86_elf_create_sframe_plt (output_bfd, info, SFRAME_PLT_SEC); | |
cf0e0a0b IB |
2518 | /* FIXME - Dirty Hack. Set the size to something non-zero for now, |
2519 | so that the section does not get stripped out below. The precise | |
2520 | size of this section is known only when the contents are | |
2521 | serialized in _bfd_x86_elf_write_sframe_plt. */ | |
2522 | htab->plt_second_sframe->size = sizeof (sframe_header) + 1; | |
2523 | } | |
2524 | } | |
2525 | ||
832ca732 L |
2526 | asection *resolved_plt = NULL; |
2527 | ||
2528 | if (htab->params->mark_plt && htab->elf.dynamic_sections_created) | |
2529 | { | |
2530 | if (htab->plt_second != NULL) | |
2531 | resolved_plt = htab->plt_second; | |
2532 | else | |
2533 | resolved_plt = htab->elf.splt; | |
2534 | ||
2535 | if (resolved_plt != NULL && resolved_plt->size == 0) | |
2536 | resolved_plt = NULL; | |
2537 | } | |
2538 | ||
5e2ac45d L |
2539 | /* We now have determined the sizes of the various dynamic sections. |
2540 | Allocate memory for them. */ | |
0a1b45a2 | 2541 | relocs = false; |
5e2ac45d L |
2542 | for (s = dynobj->sections; s != NULL; s = s->next) |
2543 | { | |
0a1b45a2 | 2544 | bool strip_section = true; |
5e2ac45d L |
2545 | |
2546 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2547 | continue; | |
2548 | ||
5af6f000 L |
2549 | /* The .relr.dyn section for compact relative relocation will |
2550 | be filled later. */ | |
2551 | if (s == htab->elf.srelrdyn) | |
2552 | continue; | |
2553 | ||
5e2ac45d L |
2554 | if (s == htab->elf.splt |
2555 | || s == htab->elf.sgot) | |
2556 | { | |
2557 | /* Strip this section if we don't need it; see the | |
2558 | comment below. */ | |
2559 | /* We'd like to strip these sections if they aren't needed, but if | |
2560 | we've exported dynamic symbols from them we must leave them. | |
2561 | It's too late to tell BFD to get rid of the symbols. */ | |
2562 | ||
2563 | if (htab->elf.hplt != NULL) | |
0a1b45a2 | 2564 | strip_section = false; |
5e2ac45d L |
2565 | } |
2566 | else if (s == htab->elf.sgotplt | |
2567 | || s == htab->elf.iplt | |
2568 | || s == htab->elf.igotplt | |
2569 | || s == htab->plt_second | |
2570 | || s == htab->plt_got | |
2571 | || s == htab->plt_eh_frame | |
2572 | || s == htab->plt_got_eh_frame | |
2573 | || s == htab->plt_second_eh_frame | |
cf0e0a0b IB |
2574 | || s == htab->plt_sframe |
2575 | || s == htab->plt_second_sframe | |
5e2ac45d L |
2576 | || s == htab->elf.sdynbss |
2577 | || s == htab->elf.sdynrelro) | |
2578 | { | |
2579 | /* Strip these too. */ | |
2580 | } | |
fd361982 | 2581 | else if (htab->is_reloc_section (bfd_section_name (s))) |
5e2ac45d L |
2582 | { |
2583 | if (s->size != 0 | |
2584 | && s != htab->elf.srelplt | |
2585 | && s != htab->srelplt2) | |
0a1b45a2 | 2586 | relocs = true; |
5e2ac45d L |
2587 | |
2588 | /* We use the reloc_count field as a counter if we need | |
2589 | to copy relocs into the output file. */ | |
2590 | if (s != htab->elf.srelplt) | |
2591 | s->reloc_count = 0; | |
2592 | } | |
2593 | else | |
2594 | { | |
2595 | /* It's not one of our sections, so don't allocate space. */ | |
2596 | continue; | |
2597 | } | |
2598 | ||
2599 | if (s->size == 0) | |
2600 | { | |
2601 | /* If we don't need this section, strip it from the | |
2602 | output file. This is mostly to handle .rel.bss and | |
2603 | .rel.plt. We must create both sections in | |
2604 | create_dynamic_sections, because they must be created | |
2605 | before the linker maps input sections to output | |
2606 | sections. The linker does that before | |
2607 | adjust_dynamic_symbol is called, and it is that | |
2608 | function which decides whether anything needs to go | |
2609 | into these sections. */ | |
2610 | if (strip_section) | |
2611 | s->flags |= SEC_EXCLUDE; | |
2612 | continue; | |
2613 | } | |
2614 | ||
2615 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
2616 | continue; | |
2617 | ||
cf0e0a0b IB |
2618 | /* Skip allocating contents for .sframe section as it is written |
2619 | out differently. See below. */ | |
2620 | if ((s == htab->plt_sframe) || (s == htab->plt_second_sframe)) | |
2621 | continue; | |
2622 | ||
b44ee3a8 L |
2623 | /* NB: Initially, the iplt section has minimal alignment to |
2624 | avoid moving dot of the following section backwards when | |
2625 | it is empty. Update its section alignment now since it | |
2626 | is non-empty. */ | |
2627 | if (s == htab->elf.iplt) | |
fd361982 | 2628 | bfd_set_section_alignment (s, htab->plt.iplt_alignment); |
b44ee3a8 | 2629 | |
5e2ac45d L |
2630 | /* Allocate memory for the section contents. We use bfd_zalloc |
2631 | here in case unused entries are not reclaimed before the | |
2632 | section's contents are written out. This should not happen, | |
2633 | but this way if it does, we get a R_386_NONE or R_X86_64_NONE | |
2634 | reloc instead of garbage. */ | |
2635 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); | |
2636 | if (s->contents == NULL) | |
0a1b45a2 | 2637 | return false; |
5e2ac45d L |
2638 | } |
2639 | ||
2640 | if (htab->plt_eh_frame != NULL | |
2641 | && htab->plt_eh_frame->contents != NULL) | |
2642 | { | |
2643 | memcpy (htab->plt_eh_frame->contents, | |
2644 | htab->plt.eh_frame_plt, | |
2645 | htab->plt_eh_frame->size); | |
2646 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
2647 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
2648 | } | |
2649 | ||
2650 | if (htab->plt_got_eh_frame != NULL | |
2651 | && htab->plt_got_eh_frame->contents != NULL) | |
2652 | { | |
2653 | memcpy (htab->plt_got_eh_frame->contents, | |
2654 | htab->non_lazy_plt->eh_frame_plt, | |
2655 | htab->plt_got_eh_frame->size); | |
2656 | bfd_put_32 (dynobj, htab->plt_got->size, | |
2657 | (htab->plt_got_eh_frame->contents | |
2658 | + PLT_FDE_LEN_OFFSET)); | |
2659 | } | |
2660 | ||
2661 | if (htab->plt_second_eh_frame != NULL | |
2662 | && htab->plt_second_eh_frame->contents != NULL) | |
2663 | { | |
2664 | memcpy (htab->plt_second_eh_frame->contents, | |
2665 | htab->non_lazy_plt->eh_frame_plt, | |
2666 | htab->plt_second_eh_frame->size); | |
2667 | bfd_put_32 (dynobj, htab->plt_second->size, | |
2668 | (htab->plt_second_eh_frame->contents | |
2669 | + PLT_FDE_LEN_OFFSET)); | |
2670 | } | |
2671 | ||
cf0e0a0b IB |
2672 | if (_bfd_elf_sframe_present (info)) |
2673 | { | |
2674 | if (htab->plt_sframe != NULL | |
2675 | && htab->elf.splt != NULL | |
2676 | && htab->elf.splt->size != 0 | |
2677 | && htab->plt_sframe->contents == NULL) | |
2678 | _bfd_x86_elf_write_sframe_plt (output_bfd, info, SFRAME_PLT); | |
2679 | ||
2680 | if (htab->plt_second_sframe != NULL | |
2681 | && htab->elf.splt != NULL | |
2682 | && htab->elf.splt->size != 0 | |
2683 | && htab->plt_second_sframe->contents == NULL) | |
2684 | _bfd_x86_elf_write_sframe_plt (output_bfd, info, SFRAME_PLT_SEC); | |
2685 | } | |
2686 | ||
832ca732 L |
2687 | if (resolved_plt != NULL |
2688 | && (!_bfd_elf_add_dynamic_entry (info, DT_X86_64_PLT, 0) | |
2689 | || !_bfd_elf_add_dynamic_entry (info, DT_X86_64_PLTSZ, 0) | |
2690 | || !_bfd_elf_add_dynamic_entry (info, DT_X86_64_PLTENT, 0))) | |
2691 | return false; | |
2692 | ||
3084d7a2 L |
2693 | return _bfd_elf_maybe_vxworks_add_dynamic_tags (output_bfd, info, |
2694 | relocs); | |
5e2ac45d L |
2695 | } |
2696 | ||
9577f60b L |
2697 | /* Finish up the x86 dynamic sections. */ |
2698 | ||
2699 | struct elf_x86_link_hash_table * | |
2700 | _bfd_x86_elf_finish_dynamic_sections (bfd *output_bfd, | |
2701 | struct bfd_link_info *info) | |
2702 | { | |
2703 | struct elf_x86_link_hash_table *htab; | |
2704 | const struct elf_backend_data *bed; | |
2705 | bfd *dynobj; | |
2706 | asection *sdyn; | |
2707 | bfd_byte *dyncon, *dynconend; | |
2708 | bfd_size_type sizeof_dyn; | |
2709 | ||
2710 | bed = get_elf_backend_data (output_bfd); | |
2711 | htab = elf_x86_hash_table (info, bed->target_id); | |
2712 | if (htab == NULL) | |
2713 | return htab; | |
2714 | ||
2715 | dynobj = htab->elf.dynobj; | |
c3460201 | 2716 | sdyn = htab->elf.dynamic; |
9577f60b L |
2717 | |
2718 | /* GOT is always created in setup_gnu_properties. But it may not be | |
2719 | needed. .got.plt section may be needed for static IFUNC. */ | |
2720 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
2721 | { | |
2722 | bfd_vma dynamic_addr; | |
2723 | ||
2724 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) | |
2725 | { | |
2726 | _bfd_error_handler | |
871b3ab2 | 2727 | (_("discarded output section: `%pA'"), htab->elf.sgotplt); |
9577f60b L |
2728 | return NULL; |
2729 | } | |
2730 | ||
2731 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
2732 | = htab->got_entry_size; | |
2733 | ||
2734 | dynamic_addr = (sdyn == NULL | |
2735 | ? (bfd_vma) 0 | |
2736 | : sdyn->output_section->vma + sdyn->output_offset); | |
2737 | ||
2738 | /* Set the first entry in the global offset table to the address | |
07d6d2b8 | 2739 | of the dynamic section. Write GOT[1] and GOT[2], needed for |
9577f60b L |
2740 | the dynamic linker. */ |
2741 | if (htab->got_entry_size == 8) | |
2742 | { | |
2743 | bfd_put_64 (output_bfd, dynamic_addr, | |
2744 | htab->elf.sgotplt->contents); | |
2745 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
2746 | htab->elf.sgotplt->contents + 8); | |
2747 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
2748 | htab->elf.sgotplt->contents + 8*2); | |
2749 | } | |
2750 | else | |
2751 | { | |
2752 | bfd_put_32 (output_bfd, dynamic_addr, | |
2753 | htab->elf.sgotplt->contents); | |
2754 | bfd_put_32 (output_bfd, 0, | |
2755 | htab->elf.sgotplt->contents + 4); | |
2756 | bfd_put_32 (output_bfd, 0, | |
2757 | htab->elf.sgotplt->contents + 4*2); | |
2758 | } | |
2759 | } | |
2760 | ||
2761 | if (!htab->elf.dynamic_sections_created) | |
2762 | return htab; | |
2763 | ||
2764 | if (sdyn == NULL || htab->elf.sgot == NULL) | |
2765 | abort (); | |
2766 | ||
832ca732 L |
2767 | asection *resolved_plt; |
2768 | if (htab->plt_second != NULL) | |
2769 | resolved_plt = htab->plt_second; | |
2770 | else | |
2771 | resolved_plt = htab->elf.splt; | |
2772 | ||
9577f60b L |
2773 | sizeof_dyn = bed->s->sizeof_dyn; |
2774 | dyncon = sdyn->contents; | |
2775 | dynconend = sdyn->contents + sdyn->size; | |
2776 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
2777 | { | |
2778 | Elf_Internal_Dyn dyn; | |
2779 | asection *s; | |
2780 | ||
2781 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); | |
2782 | ||
2783 | switch (dyn.d_tag) | |
2784 | { | |
2785 | default: | |
90c14f0c | 2786 | if (htab->elf.target_os == is_vxworks |
9577f60b L |
2787 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
2788 | break; | |
2789 | continue; | |
2790 | ||
2791 | case DT_PLTGOT: | |
2792 | s = htab->elf.sgotplt; | |
2793 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
2794 | break; | |
2795 | ||
2796 | case DT_JMPREL: | |
fa4f2d46 PE |
2797 | s = htab->elf.srelplt; |
2798 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
9577f60b L |
2799 | break; |
2800 | ||
2801 | case DT_PLTRELSZ: | |
fa4f2d46 | 2802 | s = htab->elf.srelplt; |
9577f60b L |
2803 | dyn.d_un.d_val = s->size; |
2804 | break; | |
2805 | ||
2806 | case DT_TLSDESC_PLT: | |
2807 | s = htab->elf.splt; | |
2808 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
9bcc30e4 | 2809 | + htab->elf.tlsdesc_plt; |
9577f60b L |
2810 | break; |
2811 | ||
2812 | case DT_TLSDESC_GOT: | |
2813 | s = htab->elf.sgot; | |
2814 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
9bcc30e4 | 2815 | + htab->elf.tlsdesc_got; |
9577f60b | 2816 | break; |
832ca732 L |
2817 | |
2818 | case DT_X86_64_PLT: | |
2819 | s = resolved_plt->output_section; | |
2820 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
2821 | break; | |
2822 | ||
2823 | case DT_X86_64_PLTSZ: | |
2824 | dyn.d_un.d_val = resolved_plt->size; | |
2825 | break; | |
2826 | ||
2827 | case DT_X86_64_PLTENT: | |
2828 | dyn.d_un.d_ptr = htab->plt.plt_entry_size; | |
2829 | break; | |
9577f60b L |
2830 | } |
2831 | ||
2832 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); | |
2833 | } | |
2834 | ||
2835 | if (htab->plt_got != NULL && htab->plt_got->size > 0) | |
2836 | elf_section_data (htab->plt_got->output_section) | |
2837 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
2838 | ||
2839 | if (htab->plt_second != NULL && htab->plt_second->size > 0) | |
2840 | elf_section_data (htab->plt_second->output_section) | |
2841 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
2842 | ||
2843 | /* Adjust .eh_frame for .plt section. */ | |
2844 | if (htab->plt_eh_frame != NULL | |
2845 | && htab->plt_eh_frame->contents != NULL) | |
2846 | { | |
2847 | if (htab->elf.splt != NULL | |
2848 | && htab->elf.splt->size != 0 | |
2849 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
2850 | && htab->elf.splt->output_section != NULL | |
2851 | && htab->plt_eh_frame->output_section != NULL) | |
2852 | { | |
2853 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
2854 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
2855 | + htab->plt_eh_frame->output_offset | |
2856 | + PLT_FDE_START_OFFSET; | |
2857 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
2858 | htab->plt_eh_frame->contents | |
2859 | + PLT_FDE_START_OFFSET); | |
2860 | } | |
2861 | ||
2862 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
2863 | { | |
2864 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
2865 | htab->plt_eh_frame, | |
2866 | htab->plt_eh_frame->contents)) | |
2867 | return NULL; | |
2868 | } | |
2869 | } | |
2870 | ||
2871 | /* Adjust .eh_frame for .plt.got section. */ | |
2872 | if (htab->plt_got_eh_frame != NULL | |
2873 | && htab->plt_got_eh_frame->contents != NULL) | |
2874 | { | |
2875 | if (htab->plt_got != NULL | |
2876 | && htab->plt_got->size != 0 | |
2877 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
2878 | && htab->plt_got->output_section != NULL | |
2879 | && htab->plt_got_eh_frame->output_section != NULL) | |
2880 | { | |
2881 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
2882 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
2883 | + htab->plt_got_eh_frame->output_offset | |
2884 | + PLT_FDE_START_OFFSET; | |
2885 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
2886 | htab->plt_got_eh_frame->contents | |
2887 | + PLT_FDE_START_OFFSET); | |
2888 | } | |
2889 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
2890 | { | |
2891 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
2892 | htab->plt_got_eh_frame, | |
2893 | htab->plt_got_eh_frame->contents)) | |
2894 | return NULL; | |
2895 | } | |
2896 | } | |
2897 | ||
2898 | /* Adjust .eh_frame for the second PLT section. */ | |
2899 | if (htab->plt_second_eh_frame != NULL | |
2900 | && htab->plt_second_eh_frame->contents != NULL) | |
2901 | { | |
2902 | if (htab->plt_second != NULL | |
2903 | && htab->plt_second->size != 0 | |
2904 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
2905 | && htab->plt_second->output_section != NULL | |
2906 | && htab->plt_second_eh_frame->output_section != NULL) | |
2907 | { | |
2908 | bfd_vma plt_start = htab->plt_second->output_section->vma; | |
2909 | bfd_vma eh_frame_start | |
2910 | = (htab->plt_second_eh_frame->output_section->vma | |
2911 | + htab->plt_second_eh_frame->output_offset | |
2912 | + PLT_FDE_START_OFFSET); | |
2913 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
2914 | htab->plt_second_eh_frame->contents | |
2915 | + PLT_FDE_START_OFFSET); | |
2916 | } | |
2917 | if (htab->plt_second_eh_frame->sec_info_type | |
2918 | == SEC_INFO_TYPE_EH_FRAME) | |
2919 | { | |
2920 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
2921 | htab->plt_second_eh_frame, | |
2922 | htab->plt_second_eh_frame->contents)) | |
2923 | return NULL; | |
2924 | } | |
2925 | } | |
2926 | ||
cf0e0a0b IB |
2927 | /* Make any adjustment if necessary and merge .sframe section to |
2928 | create the final .sframe section for output_bfd. */ | |
2929 | if (htab->plt_sframe != NULL | |
2930 | && htab->plt_sframe->contents != NULL) | |
2931 | { | |
2932 | if (htab->elf.splt != NULL | |
2933 | && htab->elf.splt->size != 0 | |
2934 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
2935 | && htab->elf.splt->output_section != NULL | |
2936 | && htab->plt_sframe->output_section != NULL) | |
2937 | { | |
2938 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
2939 | bfd_vma sframe_start = htab->plt_sframe->output_section->vma | |
2940 | + htab->plt_sframe->output_offset | |
2941 | + PLT_SFRAME_FDE_START_OFFSET; | |
2942 | #if 0 /* FIXME Testing only. Remove before review. */ | |
2943 | bfd_vma test_value = (plt_start - sframe_start) | |
2944 | + htab->plt_sframe->output_section->vma | |
2945 | + htab->plt_sframe->output_offset | |
2946 | + PLT_SFRAME_FDE_START_OFFSET; | |
2947 | bfd_put_signed_32 (dynobj, test_value, | |
2948 | #endif | |
2949 | bfd_put_signed_32 (dynobj, plt_start - sframe_start, | |
2950 | htab->plt_sframe->contents | |
2951 | + PLT_SFRAME_FDE_START_OFFSET); | |
2952 | } | |
2953 | if (htab->plt_sframe->sec_info_type == SEC_INFO_TYPE_SFRAME) | |
2954 | { | |
2955 | if (! _bfd_elf_merge_section_sframe (output_bfd, info, | |
2956 | htab->plt_sframe, | |
2957 | htab->plt_sframe->contents)) | |
2958 | return NULL; | |
2959 | } | |
2960 | } | |
2961 | ||
2962 | if (htab->plt_second_sframe != NULL | |
2963 | && htab->plt_second_sframe->contents != NULL) | |
2964 | { | |
2965 | if (htab->plt_second != NULL | |
2966 | && htab->plt_second->size != 0 | |
2967 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
2968 | && htab->plt_second->output_section != NULL | |
2969 | && htab->plt_second_sframe->output_section != NULL) | |
2970 | { | |
2971 | bfd_vma plt_start = htab->plt_second->output_section->vma; | |
2972 | bfd_vma sframe_start | |
2973 | = (htab->plt_second_sframe->output_section->vma | |
2974 | + htab->plt_second_sframe->output_offset | |
2975 | + PLT_SFRAME_FDE_START_OFFSET); | |
2976 | #if 0 /* FIXME Testing only. Remove before review. */ | |
2977 | bfd_vma test_value = (plt_start - sframe_start) | |
2978 | + htab->plt_second_sframe->output_section->vma | |
2979 | + htab->plt_second_sframe->output_offset | |
2980 | + PLT_SFRAME_FDE_START_OFFSET; | |
2981 | bfd_put_signed_32 (dynobj, test_value, | |
2982 | #endif | |
2983 | bfd_put_signed_32 (dynobj, plt_start - sframe_start, | |
2984 | htab->plt_second_sframe->contents | |
2985 | + PLT_SFRAME_FDE_START_OFFSET); | |
2986 | } | |
2987 | if (htab->plt_second_sframe->sec_info_type == SEC_INFO_TYPE_SFRAME) | |
2988 | { | |
2989 | if (! _bfd_elf_merge_section_sframe (output_bfd, info, | |
2990 | htab->plt_second_sframe, | |
2991 | htab->plt_second_sframe->contents)) | |
2992 | return NULL; | |
2993 | } | |
2994 | } | |
9577f60b L |
2995 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
2996 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
2997 | = htab->got_entry_size; | |
2998 | ||
2999 | return htab; | |
3000 | } | |
3001 | ||
3002 | ||
0a1b45a2 | 3003 | bool |
af969b14 AM |
3004 | _bfd_x86_elf_early_size_sections (bfd *output_bfd, |
3005 | struct bfd_link_info *info) | |
0afcef53 L |
3006 | { |
3007 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3008 | ||
04ad7193 | 3009 | if (tls_sec && !bfd_link_relocatable (info)) |
0afcef53 L |
3010 | { |
3011 | struct elf_link_hash_entry *tlsbase; | |
3012 | ||
3013 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3014 | "_TLS_MODULE_BASE_", | |
0a1b45a2 | 3015 | false, false, false); |
0afcef53 L |
3016 | |
3017 | if (tlsbase && tlsbase->type == STT_TLS) | |
3018 | { | |
3019 | struct elf_x86_link_hash_table *htab; | |
3020 | struct bfd_link_hash_entry *bh = NULL; | |
3021 | const struct elf_backend_data *bed | |
3022 | = get_elf_backend_data (output_bfd); | |
3023 | ||
3024 | htab = elf_x86_hash_table (info, bed->target_id); | |
3025 | if (htab == NULL) | |
0a1b45a2 | 3026 | return false; |
0afcef53 L |
3027 | |
3028 | if (!(_bfd_generic_link_add_one_symbol | |
3029 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
0a1b45a2 | 3030 | tls_sec, 0, NULL, false, |
0afcef53 | 3031 | bed->collect, &bh))) |
0a1b45a2 | 3032 | return false; |
0afcef53 L |
3033 | |
3034 | htab->tls_module_base = bh; | |
3035 | ||
3036 | tlsbase = (struct elf_link_hash_entry *)bh; | |
3037 | tlsbase->def_regular = 1; | |
3038 | tlsbase->other = STV_HIDDEN; | |
3039 | tlsbase->root.linker_def = 1; | |
0a1b45a2 | 3040 | (*bed->elf_backend_hide_symbol) (info, tlsbase, true); |
0afcef53 L |
3041 | } |
3042 | } | |
3043 | ||
0a1b45a2 | 3044 | return true; |
0afcef53 L |
3045 | } |
3046 | ||
3047 | void | |
3048 | _bfd_x86_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
5160d0f3 | 3049 | unsigned int st_other, |
0a1b45a2 AM |
3050 | bool definition, |
3051 | bool dynamic ATTRIBUTE_UNUSED) | |
0afcef53 L |
3052 | { |
3053 | if (definition) | |
3054 | { | |
3055 | struct elf_x86_link_hash_entry *eh | |
3056 | = (struct elf_x86_link_hash_entry *) h; | |
5160d0f3 | 3057 | eh->def_protected = ELF_ST_VISIBILITY (st_other) == STV_PROTECTED; |
0afcef53 L |
3058 | } |
3059 | } | |
3060 | ||
3061 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
3062 | ||
3063 | void | |
3064 | _bfd_x86_elf_copy_indirect_symbol (struct bfd_link_info *info, | |
3065 | struct elf_link_hash_entry *dir, | |
3066 | struct elf_link_hash_entry *ind) | |
3067 | { | |
3068 | struct elf_x86_link_hash_entry *edir, *eind; | |
3069 | ||
3070 | edir = (struct elf_x86_link_hash_entry *) dir; | |
3071 | eind = (struct elf_x86_link_hash_entry *) ind; | |
3072 | ||
0afcef53 L |
3073 | if (ind->root.type == bfd_link_hash_indirect |
3074 | && dir->got.refcount <= 0) | |
3075 | { | |
3076 | edir->tls_type = eind->tls_type; | |
3077 | eind->tls_type = GOT_UNKNOWN; | |
3078 | } | |
3079 | ||
3080 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will | |
3081 | generate a R_386_COPY reloc. */ | |
3082 | edir->gotoff_ref |= eind->gotoff_ref; | |
3083 | ||
98b273dc | 3084 | edir->zero_undefweak |= eind->zero_undefweak; |
0afcef53 L |
3085 | |
3086 | if (ELIMINATE_COPY_RELOCS | |
3087 | && ind->root.type != bfd_link_hash_indirect | |
3088 | && dir->dynamic_adjusted) | |
3089 | { | |
3090 | /* If called to transfer flags for a weakdef during processing | |
3091 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
3092 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
3093 | if (dir->versioned != versioned_hidden) | |
3094 | dir->ref_dynamic |= ind->ref_dynamic; | |
3095 | dir->ref_regular |= ind->ref_regular; | |
3096 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
3097 | dir->needs_plt |= ind->needs_plt; | |
3098 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
3099 | } | |
3100 | else | |
79b0c981 | 3101 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
0afcef53 L |
3102 | } |
3103 | ||
3104 | /* Remove undefined weak symbol from the dynamic symbol table if it | |
3105 | is resolved to 0. */ | |
3106 | ||
0a1b45a2 | 3107 | bool |
0afcef53 L |
3108 | _bfd_x86_elf_fixup_symbol (struct bfd_link_info *info, |
3109 | struct elf_link_hash_entry *h) | |
3110 | { | |
c5bce5c6 L |
3111 | if (h->dynindx != -1 |
3112 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, elf_x86_hash_entry (h))) | |
0afcef53 | 3113 | { |
c5bce5c6 L |
3114 | h->dynindx = -1; |
3115 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
3116 | h->dynstr_index); | |
0afcef53 | 3117 | } |
0a1b45a2 | 3118 | return true; |
0afcef53 L |
3119 | } |
3120 | ||
4ec09950 L |
3121 | /* Change the STT_GNU_IFUNC symbol defined in position-dependent |
3122 | executable into the normal function symbol and set its address | |
3123 | to its PLT entry, which should be resolved by R_*_IRELATIVE at | |
3124 | run-time. */ | |
3125 | ||
3126 | void | |
3127 | _bfd_x86_elf_link_fixup_ifunc_symbol (struct bfd_link_info *info, | |
3128 | struct elf_x86_link_hash_table *htab, | |
3129 | struct elf_link_hash_entry *h, | |
3130 | Elf_Internal_Sym *sym) | |
3131 | { | |
3132 | if (bfd_link_pde (info) | |
3133 | && h->def_regular | |
3134 | && h->dynindx != -1 | |
3135 | && h->plt.offset != (bfd_vma) -1 | |
75a933f3 | 3136 | && h->type == STT_GNU_IFUNC) |
4ec09950 L |
3137 | { |
3138 | asection *plt_s; | |
3139 | bfd_vma plt_offset; | |
3140 | bfd *output_bfd = info->output_bfd; | |
3141 | ||
3142 | if (htab->plt_second) | |
3143 | { | |
3144 | struct elf_x86_link_hash_entry *eh | |
3145 | = (struct elf_x86_link_hash_entry *) h; | |
3146 | ||
3147 | plt_s = htab->plt_second; | |
3148 | plt_offset = eh->plt_second.offset; | |
3149 | } | |
3150 | else | |
3151 | { | |
3152 | plt_s = htab->elf.splt; | |
3153 | plt_offset = h->plt.offset; | |
3154 | } | |
3155 | ||
3156 | sym->st_size = 0; | |
3157 | sym->st_info = ELF_ST_INFO (ELF_ST_BIND (sym->st_info), STT_FUNC); | |
3158 | sym->st_shndx | |
3159 | = _bfd_elf_section_from_bfd_section (output_bfd, | |
3160 | plt_s->output_section); | |
3161 | sym->st_value = (plt_s->output_section->vma | |
3162 | + plt_s->output_offset + plt_offset); | |
3163 | } | |
3164 | } | |
3165 | ||
68b00778 L |
3166 | /* Report relative relocation. */ |
3167 | ||
3168 | void | |
3169 | _bfd_x86_elf_link_report_relative_reloc | |
3170 | (struct bfd_link_info *info, asection *asect, | |
3171 | struct elf_link_hash_entry *h, Elf_Internal_Sym *sym, | |
3172 | const char *reloc_name, const void *reloc) | |
3173 | { | |
3174 | const char *name; | |
3175 | bfd *abfd; | |
3176 | const Elf_Internal_Rela *rel = (const Elf_Internal_Rela *) reloc; | |
68b00778 L |
3177 | |
3178 | /* Use the output BFD for linker created sections. */ | |
3179 | if ((asect->flags & SEC_LINKER_CREATED) != 0) | |
3180 | abfd = info->output_bfd; | |
3181 | else | |
3182 | abfd = asect->owner; | |
3183 | ||
3184 | if (h != NULL && h->root.root.string != NULL) | |
3185 | name = h->root.root.string; | |
3186 | else | |
3187 | name = bfd_elf_sym_name (abfd, &elf_symtab_hdr (abfd), sym, NULL); | |
3188 | ||
68b00778 | 3189 | if (asect->use_rela_p) |
7131d475 L |
3190 | info->callbacks->einfo |
3191 | (_("%pB: %s (offset: 0x%v, info: 0x%v, addend: 0x%v) against " | |
3192 | "'%s' " "for section '%pA' in %pB\n"), | |
3193 | info->output_bfd, reloc_name, rel->r_offset, rel->r_info, | |
3194 | rel->r_addend, name, asect, abfd); | |
68b00778 L |
3195 | else |
3196 | info->callbacks->einfo | |
7131d475 | 3197 | (_("%pB: %s (offset: 0x%v, info: 0x%v) against '%s' for section " |
68b00778 | 3198 | "'%pA' in %pB\n"), |
7131d475 | 3199 | info->output_bfd, reloc_name, rel->r_offset, rel->r_info, name, |
68b00778 L |
3200 | asect, abfd); |
3201 | } | |
3202 | ||
0afcef53 L |
3203 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
3204 | ||
0a1b45a2 | 3205 | bool |
0afcef53 L |
3206 | _bfd_x86_elf_hash_symbol (struct elf_link_hash_entry *h) |
3207 | { | |
3208 | if (h->plt.offset != (bfd_vma) -1 | |
3209 | && !h->def_regular | |
3210 | && !h->pointer_equality_needed) | |
0a1b45a2 | 3211 | return false; |
0afcef53 L |
3212 | |
3213 | return _bfd_elf_hash_symbol (h); | |
3214 | } | |
3215 | ||
eeb2f20a L |
3216 | /* Adjust a symbol defined by a dynamic object and referenced by a |
3217 | regular object. The current definition is in some section of the | |
3218 | dynamic object, but we're not including those sections. We have to | |
3219 | change the definition to something the rest of the link can | |
3220 | understand. */ | |
3221 | ||
0a1b45a2 | 3222 | bool |
eeb2f20a L |
3223 | _bfd_x86_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
3224 | struct elf_link_hash_entry *h) | |
3225 | { | |
3226 | struct elf_x86_link_hash_table *htab; | |
3227 | asection *s, *srel; | |
3228 | struct elf_x86_link_hash_entry *eh; | |
3229 | struct elf_dyn_relocs *p; | |
3230 | const struct elf_backend_data *bed | |
3231 | = get_elf_backend_data (info->output_bfd); | |
3232 | ||
406b4ada L |
3233 | eh = (struct elf_x86_link_hash_entry *) h; |
3234 | ||
6f365fda L |
3235 | /* Clear GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS if it is turned |
3236 | on by an input relocatable file and there is a non-GOT/non-PLT | |
3237 | reference from another relocatable file without it. | |
3238 | NB: There can be non-GOT reference in data sections in input with | |
3239 | GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS. */ | |
3240 | if (eh->non_got_ref_without_indirect_extern_access | |
3241 | && info->indirect_extern_access == 1 | |
3242 | && bfd_link_executable (info)) | |
3243 | { | |
3244 | unsigned int needed_1; | |
3245 | info->indirect_extern_access = 0; | |
3246 | /* Turn off nocopyreloc if implied by indirect_extern_access. */ | |
3247 | if (info->nocopyreloc == 2) | |
3248 | info->nocopyreloc = 0; | |
3249 | needed_1 = bfd_h_get_32 (info->output_bfd, info->needed_1_p); | |
3250 | needed_1 &= ~GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS; | |
3251 | bfd_h_put_32 (info->output_bfd, needed_1, info->needed_1_p); | |
3252 | } | |
3253 | ||
eeb2f20a L |
3254 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
3255 | if (h->type == STT_GNU_IFUNC) | |
3256 | { | |
3257 | /* All local STT_GNU_IFUNC references must be treate as local | |
3258 | calls via local PLT. */ | |
3259 | if (h->ref_regular | |
3260 | && SYMBOL_CALLS_LOCAL (info, h)) | |
3261 | { | |
3262 | bfd_size_type pc_count = 0, count = 0; | |
3263 | struct elf_dyn_relocs **pp; | |
3264 | ||
3265 | eh = (struct elf_x86_link_hash_entry *) h; | |
190eb1dd | 3266 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
eeb2f20a L |
3267 | { |
3268 | pc_count += p->pc_count; | |
3269 | p->count -= p->pc_count; | |
3270 | p->pc_count = 0; | |
3271 | count += p->count; | |
3272 | if (p->count == 0) | |
3273 | *pp = p->next; | |
3274 | else | |
3275 | pp = &p->next; | |
3276 | } | |
3277 | ||
3278 | if (pc_count || count) | |
3279 | { | |
3280 | h->non_got_ref = 1; | |
3281 | if (pc_count) | |
3282 | { | |
3283 | /* Increment PLT reference count only for PC-relative | |
3284 | references. */ | |
3285 | h->needs_plt = 1; | |
3286 | if (h->plt.refcount <= 0) | |
3287 | h->plt.refcount = 1; | |
3288 | else | |
3289 | h->plt.refcount += 1; | |
3290 | } | |
3291 | } | |
406b4ada L |
3292 | |
3293 | /* GOTOFF relocation needs PLT. */ | |
3294 | if (eh->gotoff_ref) | |
3295 | h->plt.refcount = 1; | |
eeb2f20a L |
3296 | } |
3297 | ||
3298 | if (h->plt.refcount <= 0) | |
3299 | { | |
3300 | h->plt.offset = (bfd_vma) -1; | |
3301 | h->needs_plt = 0; | |
3302 | } | |
0a1b45a2 | 3303 | return true; |
eeb2f20a L |
3304 | } |
3305 | ||
3306 | /* If this is a function, put it in the procedure linkage table. We | |
3307 | will fill in the contents of the procedure linkage table later, | |
3308 | when we know the address of the .got section. */ | |
3309 | if (h->type == STT_FUNC | |
3310 | || h->needs_plt) | |
3311 | { | |
3312 | if (h->plt.refcount <= 0 | |
3313 | || SYMBOL_CALLS_LOCAL (info, h) | |
3314 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3315 | && h->root.type == bfd_link_hash_undefweak)) | |
3316 | { | |
3317 | /* This case can occur if we saw a PLT32 reloc in an input | |
3318 | file, but the symbol was never referred to by a dynamic | |
3319 | object, or if all references were garbage collected. In | |
3320 | such a case, we don't actually need to build a procedure | |
3321 | linkage table, and we can just do a PC32 reloc instead. */ | |
3322 | h->plt.offset = (bfd_vma) -1; | |
3323 | h->needs_plt = 0; | |
3324 | } | |
3325 | ||
0a1b45a2 | 3326 | return true; |
eeb2f20a L |
3327 | } |
3328 | else | |
3329 | /* It's possible that we incorrectly decided a .plt reloc was needed | |
3330 | * for an R_386_PC32/R_X86_64_PC32 reloc to a non-function sym in | |
3331 | check_relocs. We can't decide accurately between function and | |
3332 | non-function syms in check-relocs; Objects loaded later in | |
3333 | the link may change h->type. So fix it now. */ | |
3334 | h->plt.offset = (bfd_vma) -1; | |
3335 | ||
eeb2f20a L |
3336 | /* If this is a weak symbol, and there is a real definition, the |
3337 | processor independent code will have arranged for us to see the | |
3338 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 3339 | if (h->is_weakalias) |
eeb2f20a | 3340 | { |
60d67dc8 AM |
3341 | struct elf_link_hash_entry *def = weakdef (h); |
3342 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
3343 | h->root.u.def.section = def->root.u.def.section; | |
3344 | h->root.u.def.value = def->root.u.def.value; | |
eeb2f20a L |
3345 | if (ELIMINATE_COPY_RELOCS |
3346 | || info->nocopyreloc | |
3347 | || SYMBOL_NO_COPYRELOC (info, eh)) | |
3348 | { | |
3349 | /* NB: needs_copy is always 0 for i386. */ | |
60d67dc8 AM |
3350 | h->non_got_ref = def->non_got_ref; |
3351 | eh->needs_copy = def->needs_copy; | |
eeb2f20a | 3352 | } |
0a1b45a2 | 3353 | return true; |
eeb2f20a L |
3354 | } |
3355 | ||
3356 | /* This is a reference to a symbol defined by a dynamic object which | |
3357 | is not a function. */ | |
3358 | ||
3359 | /* If we are creating a shared library, we must presume that the | |
3360 | only references to the symbol are via the global offset table. | |
3361 | For such cases we need not do anything here; the relocations will | |
3362 | be handled correctly by relocate_section. */ | |
3363 | if (!bfd_link_executable (info)) | |
0a1b45a2 | 3364 | return true; |
eeb2f20a L |
3365 | |
3366 | /* If there are no references to this symbol that do not use the | |
3367 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy | |
3368 | reloc. NB: gotoff_ref is always 0 for x86-64. */ | |
3369 | if (!h->non_got_ref && !eh->gotoff_ref) | |
0a1b45a2 | 3370 | return true; |
eeb2f20a L |
3371 | |
3372 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
3373 | if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh)) | |
3374 | { | |
3375 | h->non_got_ref = 0; | |
0a1b45a2 | 3376 | return true; |
eeb2f20a L |
3377 | } |
3378 | ||
3379 | htab = elf_x86_hash_table (info, bed->target_id); | |
3380 | if (htab == NULL) | |
0a1b45a2 | 3381 | return false; |
eeb2f20a L |
3382 | |
3383 | /* If there aren't any dynamic relocs in read-only sections nor | |
3384 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
3385 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
3386 | not have dynamic relocations (other than copy and jump slot | |
3387 | relocations) in an executable. */ | |
3388 | if (ELIMINATE_COPY_RELOCS | |
3389 | && (bed->target_id == X86_64_ELF_DATA | |
3390 | || (!eh->gotoff_ref | |
90c14f0c | 3391 | && htab->elf.target_os != is_vxworks))) |
eeb2f20a | 3392 | { |
826c3f1e | 3393 | /* If we don't find any dynamic relocs in read-only sections, |
eeb2f20a L |
3394 | then we'll be keeping the dynamic relocs and avoiding the copy |
3395 | reloc. */ | |
5dbc8b37 | 3396 | if (!_bfd_elf_readonly_dynrelocs (h)) |
eeb2f20a L |
3397 | { |
3398 | h->non_got_ref = 0; | |
0a1b45a2 | 3399 | return true; |
eeb2f20a L |
3400 | } |
3401 | } | |
3402 | ||
3403 | /* We must allocate the symbol in our .dynbss section, which will | |
3404 | become part of the .bss section of the executable. There will be | |
3405 | an entry for this symbol in the .dynsym section. The dynamic | |
3406 | object will contain position independent code, so all references | |
3407 | from the dynamic object to this symbol will go through the global | |
3408 | offset table. The dynamic linker will use the .dynsym entry to | |
3409 | determine the address it must put in the global offset table, so | |
3410 | both the dynamic object and the regular object will refer to the | |
3411 | same memory location for the variable. */ | |
3412 | ||
3413 | /* We must generate a R_386_COPY/R_X86_64_COPY reloc to tell the | |
3414 | dynamic linker to copy the initial value out of the dynamic object | |
3415 | and into the runtime process image. */ | |
3416 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) | |
3417 | { | |
3418 | s = htab->elf.sdynrelro; | |
3419 | srel = htab->elf.sreldynrelro; | |
3420 | } | |
3421 | else | |
3422 | { | |
3423 | s = htab->elf.sdynbss; | |
3424 | srel = htab->elf.srelbss; | |
3425 | } | |
3426 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) | |
3427 | { | |
f6386577 L |
3428 | if (eh->def_protected && bfd_link_executable (info)) |
3429 | for (p = h->dyn_relocs; p != NULL; p = p->next) | |
3430 | { | |
3431 | /* Disallow copy relocation against non-copyable protected | |
3432 | symbol. */ | |
3433 | s = p->sec->output_section; | |
3434 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3435 | { | |
3436 | info->callbacks->einfo | |
3437 | /* xgettext:c-format */ | |
3438 | (_("%F%P: %pB: copy relocation against non-copyable " | |
3439 | "protected symbol `%s' in %pB\n"), | |
3440 | p->sec->owner, h->root.root.string, | |
3441 | h->root.u.def.section->owner); | |
3442 | return false; | |
3443 | } | |
3444 | } | |
3445 | ||
503294e7 | 3446 | srel->size += htab->sizeof_reloc; |
eeb2f20a L |
3447 | h->needs_copy = 1; |
3448 | } | |
3449 | ||
3450 | return _bfd_elf_adjust_dynamic_copy (info, h, s); | |
3451 | } | |
3452 | ||
9f857535 L |
3453 | void |
3454 | _bfd_x86_elf_hide_symbol (struct bfd_link_info *info, | |
3455 | struct elf_link_hash_entry *h, | |
0a1b45a2 | 3456 | bool force_local) |
9f857535 L |
3457 | { |
3458 | if (h->root.type == bfd_link_hash_undefweak | |
3459 | && info->nointerp | |
3460 | && bfd_link_pie (info)) | |
3461 | { | |
3462 | /* When there is no dynamic interpreter in PIE, make the undefined | |
3463 | weak symbol dynamic so that PC relative branch to the undefined | |
3464 | weak symbol will land to address 0. */ | |
3465 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); | |
79b0c981 | 3466 | if (h->plt.refcount > 0 |
9f857535 L |
3467 | || eh->plt_got.refcount > 0) |
3468 | return; | |
3469 | } | |
3470 | ||
3471 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); | |
3472 | } | |
3473 | ||
6999821f L |
3474 | /* Return TRUE if a symbol is referenced locally. It is similar to |
3475 | SYMBOL_REFERENCES_LOCAL, but it also checks version script. It | |
3476 | works in check_relocs. */ | |
3477 | ||
0a1b45a2 | 3478 | bool |
6999821f L |
3479 | _bfd_x86_elf_link_symbol_references_local (struct bfd_link_info *info, |
3480 | struct elf_link_hash_entry *h) | |
3481 | { | |
0a27fed7 L |
3482 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); |
3483 | struct elf_x86_link_hash_table *htab | |
3484 | = (struct elf_x86_link_hash_table *) info->hash; | |
6999821f L |
3485 | |
3486 | if (eh->local_ref > 1) | |
0a1b45a2 | 3487 | return true; |
6999821f L |
3488 | |
3489 | if (eh->local_ref == 1) | |
0a1b45a2 | 3490 | return false; |
6999821f L |
3491 | |
3492 | /* Unversioned symbols defined in regular objects can be forced local | |
0a27fed7 L |
3493 | by linker version script. A weak undefined symbol is forced local |
3494 | if | |
3495 | 1. It has non-default visibility. Or | |
8fbf0ba1 | 3496 | 2. When building executable, there is no dynamic linker. Or |
0a27fed7 L |
3497 | 3. or "-z nodynamic-undefined-weak" is used. |
3498 | */ | |
d19a2654 | 3499 | if (_bfd_elf_symbol_refs_local_p (h, info, 1) |
0a27fed7 L |
3500 | || (h->root.type == bfd_link_hash_undefweak |
3501 | && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3502 | || (bfd_link_executable (info) | |
8fbf0ba1 | 3503 | && htab->interp == NULL) |
0a27fed7 | 3504 | || info->dynamic_undefined_weak == 0)) |
6999821f | 3505 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
6999821f | 3506 | && info->version_info != NULL |
099bb8fb | 3507 | && _bfd_elf_link_hide_sym_by_version (info, h))) |
6999821f L |
3508 | { |
3509 | eh->local_ref = 2; | |
0a1b45a2 | 3510 | return true; |
6999821f L |
3511 | } |
3512 | ||
099bb8fb | 3513 | eh->local_ref = 1; |
0a1b45a2 | 3514 | return false; |
6999821f L |
3515 | } |
3516 | ||
4f501a24 L |
3517 | /* Return the section that should be marked against GC for a given |
3518 | relocation. */ | |
3519 | ||
3520 | asection * | |
3521 | _bfd_x86_elf_gc_mark_hook (asection *sec, | |
3522 | struct bfd_link_info *info, | |
3523 | Elf_Internal_Rela *rel, | |
3524 | struct elf_link_hash_entry *h, | |
3525 | Elf_Internal_Sym *sym) | |
3526 | { | |
3527 | /* Compiler should optimize this out. */ | |
3528 | if (((unsigned int) R_X86_64_GNU_VTINHERIT | |
3529 | != (unsigned int) R_386_GNU_VTINHERIT) | |
3530 | || ((unsigned int) R_X86_64_GNU_VTENTRY | |
3531 | != (unsigned int) R_386_GNU_VTENTRY)) | |
3532 | abort (); | |
3533 | ||
3534 | if (h != NULL) | |
3535 | switch (ELF32_R_TYPE (rel->r_info)) | |
3536 | { | |
3537 | case R_X86_64_GNU_VTINHERIT: | |
3538 | case R_X86_64_GNU_VTENTRY: | |
3539 | return NULL; | |
3540 | } | |
3541 | ||
3542 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
3543 | } | |
3544 | ||
f493882d L |
3545 | static bfd_vma |
3546 | elf_i386_get_plt_got_vma (struct elf_x86_plt *plt_p ATTRIBUTE_UNUSED, | |
3547 | bfd_vma off, | |
3548 | bfd_vma offset ATTRIBUTE_UNUSED, | |
3549 | bfd_vma got_addr) | |
3550 | { | |
3551 | return got_addr + off; | |
3552 | } | |
3553 | ||
3554 | static bfd_vma | |
3555 | elf_x86_64_get_plt_got_vma (struct elf_x86_plt *plt_p, | |
3556 | bfd_vma off, | |
3557 | bfd_vma offset, | |
3558 | bfd_vma got_addr ATTRIBUTE_UNUSED) | |
3559 | { | |
3560 | return plt_p->sec->vma + offset + off + plt_p->plt_got_insn_size; | |
3561 | } | |
3562 | ||
0a1b45a2 | 3563 | static bool |
f493882d L |
3564 | elf_i386_valid_plt_reloc_p (unsigned int type) |
3565 | { | |
3566 | return (type == R_386_JUMP_SLOT | |
3567 | || type == R_386_GLOB_DAT | |
3568 | || type == R_386_IRELATIVE); | |
3569 | } | |
3570 | ||
0a1b45a2 | 3571 | static bool |
f493882d L |
3572 | elf_x86_64_valid_plt_reloc_p (unsigned int type) |
3573 | { | |
3574 | return (type == R_X86_64_JUMP_SLOT | |
3575 | || type == R_X86_64_GLOB_DAT | |
3576 | || type == R_X86_64_IRELATIVE); | |
3577 | } | |
3578 | ||
3579 | long | |
3580 | _bfd_x86_elf_get_synthetic_symtab (bfd *abfd, | |
3581 | long count, | |
3582 | long relsize, | |
3583 | bfd_vma got_addr, | |
3584 | struct elf_x86_plt plts[], | |
3585 | asymbol **dynsyms, | |
3586 | asymbol **ret) | |
3587 | { | |
3588 | long size, i, n, len; | |
3589 | int j; | |
3590 | unsigned int plt_got_offset, plt_entry_size; | |
3591 | asymbol *s; | |
3592 | bfd_byte *plt_contents; | |
3593 | long dynrelcount; | |
3594 | arelent **dynrelbuf, *p; | |
3595 | char *names; | |
3596 | const struct elf_backend_data *bed; | |
3597 | bfd_vma (*get_plt_got_vma) (struct elf_x86_plt *, bfd_vma, bfd_vma, | |
3598 | bfd_vma); | |
0a1b45a2 | 3599 | bool (*valid_plt_reloc_p) (unsigned int); |
832ca732 | 3600 | unsigned int jump_slot_reloc; |
f493882d | 3601 | |
2600d80c | 3602 | dynrelbuf = NULL; |
f493882d | 3603 | if (count == 0) |
2600d80c | 3604 | goto bad_return; |
f493882d L |
3605 | |
3606 | dynrelbuf = (arelent **) bfd_malloc (relsize); | |
3607 | if (dynrelbuf == NULL) | |
2600d80c | 3608 | goto bad_return; |
f493882d L |
3609 | |
3610 | dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, | |
3611 | dynsyms); | |
b69e9267 | 3612 | if (dynrelcount <= 0) |
2600d80c | 3613 | goto bad_return; |
f493882d L |
3614 | |
3615 | /* Sort the relocs by address. */ | |
3616 | qsort (dynrelbuf, dynrelcount, sizeof (arelent *), | |
3617 | _bfd_x86_elf_compare_relocs); | |
3618 | ||
3619 | size = count * sizeof (asymbol); | |
3620 | ||
3621 | /* Allocate space for @plt suffixes. */ | |
3622 | n = 0; | |
3623 | for (i = 0; i < dynrelcount; i++) | |
3624 | { | |
3625 | p = dynrelbuf[i]; | |
3626 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
3627 | if (p->addend != 0) | |
3628 | size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd); | |
3629 | } | |
3630 | ||
3631 | s = *ret = (asymbol *) bfd_zmalloc (size); | |
3632 | if (s == NULL) | |
3633 | goto bad_return; | |
3634 | ||
3635 | bed = get_elf_backend_data (abfd); | |
3636 | ||
3637 | if (bed->target_id == X86_64_ELF_DATA) | |
3638 | { | |
3639 | get_plt_got_vma = elf_x86_64_get_plt_got_vma; | |
3640 | valid_plt_reloc_p = elf_x86_64_valid_plt_reloc_p; | |
832ca732 | 3641 | jump_slot_reloc = R_X86_64_JUMP_SLOT; |
f493882d L |
3642 | } |
3643 | else | |
3644 | { | |
3645 | get_plt_got_vma = elf_i386_get_plt_got_vma; | |
3646 | valid_plt_reloc_p = elf_i386_valid_plt_reloc_p; | |
832ca732 | 3647 | jump_slot_reloc = R_386_JUMP_SLOT; |
f493882d L |
3648 | if (got_addr) |
3649 | { | |
3650 | /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_ | |
3651 | address. */ | |
3652 | asection *sec = bfd_get_section_by_name (abfd, ".got.plt"); | |
3653 | if (sec != NULL) | |
3654 | got_addr = sec->vma; | |
3655 | else | |
3656 | { | |
3657 | sec = bfd_get_section_by_name (abfd, ".got"); | |
3658 | if (sec != NULL) | |
3659 | got_addr = sec->vma; | |
3660 | } | |
3661 | ||
3662 | if (got_addr == (bfd_vma) -1) | |
3663 | goto bad_return; | |
3664 | } | |
3665 | } | |
3666 | ||
3667 | /* Check for each PLT section. */ | |
3668 | names = (char *) (s + count); | |
3669 | size = 0; | |
3670 | n = 0; | |
3671 | for (j = 0; plts[j].name != NULL; j++) | |
3672 | if ((plt_contents = plts[j].contents) != NULL) | |
3673 | { | |
3674 | long k; | |
3675 | bfd_vma offset; | |
3676 | asection *plt; | |
3677 | struct elf_x86_plt *plt_p = &plts[j]; | |
3678 | ||
3679 | plt_got_offset = plt_p->plt_got_offset; | |
3680 | plt_entry_size = plt_p->plt_entry_size; | |
3681 | ||
3682 | plt = plt_p->sec; | |
3683 | ||
3684 | if ((plt_p->type & plt_lazy)) | |
3685 | { | |
3686 | /* Skip PLT0 in lazy PLT. */ | |
3687 | k = 1; | |
3688 | offset = plt_entry_size; | |
3689 | } | |
3690 | else | |
3691 | { | |
3692 | k = 0; | |
3693 | offset = 0; | |
3694 | } | |
3695 | ||
3696 | /* Check each PLT entry against dynamic relocations. */ | |
3697 | for (; k < plt_p->count; k++) | |
3698 | { | |
3699 | int off; | |
3700 | bfd_vma got_vma; | |
3701 | long min, max, mid; | |
3702 | ||
3703 | /* Get the GOT offset for i386 or the PC-relative offset | |
3704 | for x86-64, a signed 32-bit integer. */ | |
3705 | off = H_GET_32 (abfd, (plt_contents + offset | |
3706 | + plt_got_offset)); | |
3707 | got_vma = get_plt_got_vma (plt_p, off, offset, got_addr); | |
3708 | ||
3709 | /* Binary search. */ | |
3710 | p = dynrelbuf[0]; | |
3711 | min = 0; | |
3712 | max = dynrelcount; | |
3713 | while ((min + 1) < max) | |
3714 | { | |
3715 | arelent *r; | |
3716 | ||
3717 | mid = (min + max) / 2; | |
3718 | r = dynrelbuf[mid]; | |
3719 | if (got_vma > r->address) | |
3720 | min = mid; | |
3721 | else if (got_vma < r->address) | |
3722 | max = mid; | |
3723 | else | |
3724 | { | |
3725 | p = r; | |
3726 | break; | |
3727 | } | |
3728 | } | |
3729 | ||
3730 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ | |
3731 | if (got_vma == p->address | |
3732 | && p->howto != NULL | |
3733 | && valid_plt_reloc_p (p->howto->type)) | |
3734 | { | |
3735 | *s = **p->sym_ptr_ptr; | |
3736 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL | |
3737 | set. Since we are defining a symbol, ensure one | |
3738 | of them is set. */ | |
3739 | if ((s->flags & BSF_LOCAL) == 0) | |
3740 | s->flags |= BSF_GLOBAL; | |
3741 | s->flags |= BSF_SYNTHETIC; | |
3742 | /* This is no longer a section symbol. */ | |
3743 | s->flags &= ~BSF_SECTION_SYM; | |
3744 | s->section = plt; | |
3745 | s->the_bfd = plt->owner; | |
3746 | s->value = offset; | |
3747 | s->udata.p = NULL; | |
3748 | s->name = names; | |
3749 | len = strlen ((*p->sym_ptr_ptr)->name); | |
3750 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
3751 | names += len; | |
832ca732 L |
3752 | /* There may be JUMP_SLOT and IRELATIVE relocations. |
3753 | JUMP_SLOT r_addend should be ignored. */ | |
3754 | if (p->addend != 0 && p->howto->type != jump_slot_reloc) | |
f493882d L |
3755 | { |
3756 | char buf[30], *a; | |
3757 | ||
3758 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
3759 | names += sizeof ("+0x") - 1; | |
3760 | bfd_sprintf_vma (abfd, buf, p->addend); | |
3761 | for (a = buf; *a == '0'; ++a) | |
3762 | ; | |
3763 | size = strlen (a); | |
3764 | memcpy (names, a, size); | |
3765 | names += size; | |
3766 | } | |
3767 | memcpy (names, "@plt", sizeof ("@plt")); | |
3768 | names += sizeof ("@plt"); | |
3769 | n++; | |
3770 | s++; | |
61e3bf5f L |
3771 | /* There should be only one entry in PLT for a given |
3772 | symbol. Set howto to NULL after processing a PLT | |
3773 | entry to guard against corrupted PLT. */ | |
3774 | p->howto = NULL; | |
f493882d L |
3775 | } |
3776 | offset += plt_entry_size; | |
3777 | } | |
3778 | } | |
3779 | ||
3780 | /* PLT entries with R_386_TLS_DESC relocations are skipped. */ | |
3781 | if (n == 0) | |
3782 | { | |
dc1e8a47 | 3783 | bad_return: |
f493882d L |
3784 | count = -1; |
3785 | } | |
3786 | else | |
3787 | count = n; | |
3788 | ||
3789 | for (j = 0; plts[j].name != NULL; j++) | |
584b30e4 | 3790 | _bfd_elf_munmap_section_contents (plts[j].sec, plts[j].contents); |
f493882d L |
3791 | |
3792 | free (dynrelbuf); | |
3793 | ||
3794 | return count; | |
3795 | } | |
3796 | ||
0afcef53 L |
3797 | /* Parse x86 GNU properties. */ |
3798 | ||
3799 | enum elf_property_kind | |
3800 | _bfd_x86_elf_parse_gnu_properties (bfd *abfd, unsigned int type, | |
3801 | bfd_byte *ptr, unsigned int datasz) | |
3802 | { | |
3803 | elf_property *prop; | |
3804 | ||
a9eafb08 L |
3805 | if (type == GNU_PROPERTY_X86_COMPAT_ISA_1_USED |
3806 | || type == GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED | |
3807 | || (type >= GNU_PROPERTY_X86_UINT32_AND_LO | |
3808 | && type <= GNU_PROPERTY_X86_UINT32_AND_HI) | |
3809 | || (type >= GNU_PROPERTY_X86_UINT32_OR_LO | |
3810 | && type <= GNU_PROPERTY_X86_UINT32_OR_HI) | |
3811 | || (type >= GNU_PROPERTY_X86_UINT32_OR_AND_LO | |
3812 | && type <= GNU_PROPERTY_X86_UINT32_OR_AND_HI)) | |
0afcef53 | 3813 | { |
0afcef53 L |
3814 | if (datasz != 4) |
3815 | { | |
3816 | _bfd_error_handler | |
a9eafb08 L |
3817 | (_("error: %pB: <corrupt x86 property (0x%x) size: 0x%x>"), |
3818 | abfd, type, datasz); | |
0afcef53 L |
3819 | return property_corrupt; |
3820 | } | |
3821 | prop = _bfd_elf_get_property (abfd, type, datasz); | |
1273b2f8 | 3822 | prop->u.number |= bfd_h_get_32 (abfd, ptr); |
0afcef53 | 3823 | prop->pr_kind = property_number; |
a9eafb08 | 3824 | return property_number; |
0afcef53 L |
3825 | } |
3826 | ||
a9eafb08 | 3827 | return property_ignored; |
0afcef53 L |
3828 | } |
3829 | ||
3830 | /* Merge x86 GNU property BPROP with APROP. If APROP isn't NULL, | |
3831 | return TRUE if APROP is updated. Otherwise, return TRUE if BPROP | |
3832 | should be merged with ABFD. */ | |
3833 | ||
0a1b45a2 | 3834 | bool |
0afcef53 L |
3835 | _bfd_x86_elf_merge_gnu_properties (struct bfd_link_info *info, |
3836 | bfd *abfd ATTRIBUTE_UNUSED, | |
4e539114 | 3837 | bfd *bbfd ATTRIBUTE_UNUSED, |
0afcef53 L |
3838 | elf_property *aprop, |
3839 | elf_property *bprop) | |
3840 | { | |
3841 | unsigned int number, features; | |
0a1b45a2 | 3842 | bool updated = false; |
32930e4e L |
3843 | const struct elf_backend_data *bed; |
3844 | struct elf_x86_link_hash_table *htab; | |
0afcef53 L |
3845 | unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type; |
3846 | ||
a9eafb08 L |
3847 | if (pr_type == GNU_PROPERTY_X86_COMPAT_ISA_1_USED |
3848 | || (pr_type >= GNU_PROPERTY_X86_UINT32_OR_AND_LO | |
3849 | && pr_type <= GNU_PROPERTY_X86_UINT32_OR_AND_HI)) | |
0afcef53 | 3850 | { |
f7309df2 L |
3851 | if (aprop == NULL || bprop == NULL) |
3852 | { | |
3853 | /* Only one of APROP and BPROP can be NULL. */ | |
3854 | if (aprop != NULL) | |
3855 | { | |
3856 | /* Remove this property since the other input file doesn't | |
3857 | have it. */ | |
3858 | aprop->pr_kind = property_remove; | |
0a1b45a2 | 3859 | updated = true; |
f7309df2 | 3860 | } |
f7309df2 | 3861 | } |
fde51dd1 L |
3862 | else |
3863 | { | |
3864 | number = aprop->u.number; | |
3865 | aprop->u.number = number | bprop->u.number; | |
3866 | updated = number != (unsigned int) aprop->u.number; | |
3867 | } | |
3868 | return updated; | |
a9eafb08 L |
3869 | } |
3870 | else if (pr_type == GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED | |
3871 | || (pr_type >= GNU_PROPERTY_X86_UINT32_OR_LO | |
3872 | && pr_type <= GNU_PROPERTY_X86_UINT32_OR_HI)) | |
3873 | { | |
32930e4e L |
3874 | features = 0; |
3875 | if (pr_type == GNU_PROPERTY_X86_ISA_1_NEEDED) | |
3876 | { | |
3877 | bed = get_elf_backend_data (info->output_bfd); | |
3878 | htab = elf_x86_hash_table (info, bed->target_id); | |
3879 | switch (htab->params->isa_level) | |
3880 | { | |
3881 | case 0: | |
3882 | break; | |
3883 | case 2: | |
3884 | features = GNU_PROPERTY_X86_ISA_1_V2; | |
3885 | break; | |
3886 | case 3: | |
3887 | features = GNU_PROPERTY_X86_ISA_1_V3; | |
3888 | break; | |
3889 | case 4: | |
3890 | features = GNU_PROPERTY_X86_ISA_1_V4; | |
3891 | break; | |
3892 | default: | |
3893 | abort (); | |
3894 | } | |
3895 | } | |
0afcef53 L |
3896 | if (aprop != NULL && bprop != NULL) |
3897 | { | |
3898 | number = aprop->u.number; | |
32930e4e | 3899 | aprop->u.number = number | bprop->u.number | features; |
f7309df2 | 3900 | /* Remove the property if all bits are empty. */ |
56ad703d L |
3901 | if (aprop->u.number == 0) |
3902 | { | |
3903 | aprop->pr_kind = property_remove; | |
0a1b45a2 | 3904 | updated = true; |
56ad703d L |
3905 | } |
3906 | else | |
3907 | updated = number != (unsigned int) aprop->u.number; | |
0afcef53 L |
3908 | } |
3909 | else | |
3910 | { | |
56ad703d L |
3911 | /* Only one of APROP and BPROP can be NULL. */ |
3912 | if (aprop != NULL) | |
3913 | { | |
32930e4e | 3914 | aprop->u.number |= features; |
56ad703d L |
3915 | if (aprop->u.number == 0) |
3916 | { | |
f7309df2 | 3917 | /* Remove APROP if all bits are empty. */ |
56ad703d | 3918 | aprop->pr_kind = property_remove; |
0a1b45a2 | 3919 | updated = true; |
56ad703d L |
3920 | } |
3921 | } | |
3922 | else | |
3923 | { | |
f7309df2 | 3924 | /* Return TRUE if APROP is NULL and all bits of BPROP |
56ad703d L |
3925 | aren't empty to indicate that BPROP should be added |
3926 | to ABFD. */ | |
32930e4e | 3927 | bprop->u.number |= features; |
56ad703d L |
3928 | updated = bprop->u.number != 0; |
3929 | } | |
0afcef53 | 3930 | } |
a9eafb08 L |
3931 | return updated; |
3932 | } | |
3933 | else if (pr_type >= GNU_PROPERTY_X86_UINT32_AND_LO | |
3934 | && pr_type <= GNU_PROPERTY_X86_UINT32_AND_HI) | |
3935 | { | |
0afcef53 L |
3936 | /* Only one of APROP and BPROP can be NULL: |
3937 | 1. APROP & BPROP when both APROP and BPROP aren't NULL. | |
3938 | 2. If APROP is NULL, remove x86 feature. | |
3939 | 3. Otherwise, do nothing. | |
3940 | */ | |
32930e4e L |
3941 | bed = get_elf_backend_data (info->output_bfd); |
3942 | htab = elf_x86_hash_table (info, bed->target_id); | |
5b9c07b2 L |
3943 | if (!htab) |
3944 | abort (); | |
0afcef53 L |
3945 | if (aprop != NULL && bprop != NULL) |
3946 | { | |
0afcef53 | 3947 | number = aprop->u.number; |
574df58f L |
3948 | aprop->u.number = number & bprop->u.number; |
3949 | if (pr_type == GNU_PROPERTY_X86_FEATURE_1_AND) | |
3950 | { | |
3951 | features = 0; | |
3952 | if (htab->params->ibt) | |
3953 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
3954 | if (htab->params->shstk) | |
3955 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
0a94990b L |
3956 | if (htab->params->lam_u48) |
3957 | features |= (GNU_PROPERTY_X86_FEATURE_1_LAM_U48 | |
3958 | | GNU_PROPERTY_X86_FEATURE_1_LAM_U57); | |
3959 | else if (htab->params->lam_u57) | |
3960 | features |= GNU_PROPERTY_X86_FEATURE_1_LAM_U57; | |
3961 | /* Add GNU_PROPERTY_X86_FEATURE_1_IBT, | |
3962 | GNU_PROPERTY_X86_FEATURE_1_SHSTK, | |
3963 | GNU_PROPERTY_X86_FEATURE_1_LAM_U48 and | |
3964 | GNU_PROPERTY_X86_FEATURE_1_LAM_U57. */ | |
574df58f L |
3965 | aprop->u.number |= features; |
3966 | } | |
0afcef53 L |
3967 | updated = number != (unsigned int) aprop->u.number; |
3968 | /* Remove the property if all feature bits are cleared. */ | |
3969 | if (aprop->u.number == 0) | |
3970 | aprop->pr_kind = property_remove; | |
3971 | } | |
3972 | else | |
3973 | { | |
44b27f95 L |
3974 | /* There should be no AND properties since some input doesn't |
3975 | have them. Set IBT and SHSTK properties for -z ibt and -z | |
3976 | shstk if needed. */ | |
0afcef53 | 3977 | features = 0; |
574df58f L |
3978 | if (pr_type == GNU_PROPERTY_X86_FEATURE_1_AND) |
3979 | { | |
3980 | if (htab->params->ibt) | |
3981 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
3982 | if (htab->params->shstk) | |
3983 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
0a94990b L |
3984 | if (htab->params->lam_u48) |
3985 | features |= (GNU_PROPERTY_X86_FEATURE_1_LAM_U48 | |
3986 | | GNU_PROPERTY_X86_FEATURE_1_LAM_U57); | |
3987 | else if (htab->params->lam_u57) | |
3988 | features |= GNU_PROPERTY_X86_FEATURE_1_LAM_U57; | |
574df58f | 3989 | } |
0afcef53 L |
3990 | if (features) |
3991 | { | |
0afcef53 L |
3992 | if (aprop != NULL) |
3993 | { | |
44b27f95 L |
3994 | updated = features != (unsigned int) aprop->u.number; |
3995 | aprop->u.number = features; | |
0afcef53 L |
3996 | } |
3997 | else | |
3998 | { | |
0a1b45a2 | 3999 | updated = true; |
44b27f95 | 4000 | bprop->u.number = features; |
0afcef53 L |
4001 | } |
4002 | } | |
4003 | else if (aprop != NULL) | |
4004 | { | |
4005 | aprop->pr_kind = property_remove; | |
0a1b45a2 | 4006 | updated = true; |
0afcef53 L |
4007 | } |
4008 | } | |
a9eafb08 L |
4009 | return updated; |
4010 | } | |
4011 | else | |
4012 | { | |
0afcef53 L |
4013 | /* Never should happen. */ |
4014 | abort (); | |
4015 | } | |
4016 | ||
4017 | return updated; | |
4018 | } | |
a6798bab L |
4019 | |
4020 | /* Set up x86 GNU properties. Return the first relocatable ELF input | |
4021 | with GNU properties if found. Otherwise, return NULL. */ | |
4022 | ||
4023 | bfd * | |
4024 | _bfd_x86_elf_link_setup_gnu_properties | |
1de031c8 | 4025 | (struct bfd_link_info *info, struct elf_x86_init_table *init_table) |
a6798bab | 4026 | { |
0a1b45a2 AM |
4027 | bool normal_target; |
4028 | bool lazy_plt; | |
a6798bab L |
4029 | asection *sec, *pltsec; |
4030 | bfd *dynobj; | |
0a1b45a2 | 4031 | bool use_ibt_plt; |
32930e4e | 4032 | unsigned int plt_alignment, features, isa_level; |
a6798bab L |
4033 | struct elf_x86_link_hash_table *htab; |
4034 | bfd *pbfd; | |
4035 | bfd *ebfd = NULL; | |
4036 | elf_property *prop; | |
4037 | const struct elf_backend_data *bed; | |
4038 | unsigned int class_align = ABI_64_P (info->output_bfd) ? 3 : 2; | |
4039 | unsigned int got_align; | |
4040 | ||
a6798bab L |
4041 | /* Find a normal input file with GNU property note. */ |
4042 | for (pbfd = info->input_bfds; | |
4043 | pbfd != NULL; | |
4044 | pbfd = pbfd->link.next) | |
4045 | if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour | |
4046 | && bfd_count_sections (pbfd) != 0) | |
4047 | { | |
4048 | ebfd = pbfd; | |
4049 | ||
4050 | if (elf_properties (pbfd) != NULL) | |
4051 | break; | |
4052 | } | |
4053 | ||
241e64e3 L |
4054 | bed = get_elf_backend_data (info->output_bfd); |
4055 | ||
4056 | htab = elf_x86_hash_table (info, bed->target_id); | |
4057 | if (htab == NULL) | |
4058 | return pbfd; | |
4059 | ||
5b9c07b2 L |
4060 | features = 0; |
4061 | if (htab->params->ibt) | |
233a0083 L |
4062 | { |
4063 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
279d901e | 4064 | htab->params->cet_report &= ~prop_report_ibt; |
233a0083 | 4065 | } |
5b9c07b2 | 4066 | if (htab->params->shstk) |
233a0083 L |
4067 | { |
4068 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
279d901e L |
4069 | htab->params->cet_report &= ~prop_report_shstk; |
4070 | } | |
4071 | if (!(htab->params->cet_report & (prop_report_ibt | prop_report_shstk))) | |
4072 | htab->params->cet_report = prop_report_none; | |
4073 | if (htab->params->lam_u48) | |
4074 | { | |
ba9e922f L |
4075 | features |= (GNU_PROPERTY_X86_FEATURE_1_LAM_U48 |
4076 | | GNU_PROPERTY_X86_FEATURE_1_LAM_U57); | |
279d901e | 4077 | htab->params->lam_u48_report = prop_report_none; |
ba9e922f | 4078 | htab->params->lam_u57_report = prop_report_none; |
279d901e | 4079 | } |
ba9e922f | 4080 | else if (htab->params->lam_u57) |
279d901e L |
4081 | { |
4082 | features |= GNU_PROPERTY_X86_FEATURE_1_LAM_U57; | |
4083 | htab->params->lam_u57_report = prop_report_none; | |
233a0083 | 4084 | } |
5b9c07b2 | 4085 | |
32930e4e L |
4086 | switch (htab->params->isa_level) |
4087 | { | |
4088 | case 0: | |
4089 | isa_level = 0; | |
4090 | break; | |
b0ab0693 L |
4091 | case 1: |
4092 | isa_level = GNU_PROPERTY_X86_ISA_1_BASELINE; | |
4093 | break; | |
32930e4e L |
4094 | case 2: |
4095 | isa_level = GNU_PROPERTY_X86_ISA_1_V2; | |
4096 | break; | |
4097 | case 3: | |
4098 | isa_level = GNU_PROPERTY_X86_ISA_1_V3; | |
4099 | break; | |
4100 | case 4: | |
4101 | isa_level = GNU_PROPERTY_X86_ISA_1_V4; | |
4102 | break; | |
4103 | default: | |
4104 | abort (); | |
4105 | } | |
4106 | ||
241e64e3 | 4107 | if (ebfd != NULL) |
a6798bab | 4108 | { |
241e64e3 L |
4109 | prop = NULL; |
4110 | if (features) | |
4111 | { | |
279d901e L |
4112 | /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT, |
4113 | GNU_PROPERTY_X86_FEATURE_1_SHSTK, | |
4114 | GNU_PROPERTY_X86_FEATURE_1_LAM_U48 and | |
4115 | GNU_PROPERTY_X86_FEATURE_1_LAM_U57. */ | |
241e64e3 L |
4116 | prop = _bfd_elf_get_property (ebfd, |
4117 | GNU_PROPERTY_X86_FEATURE_1_AND, | |
4118 | 4); | |
4119 | prop->u.number |= features; | |
32930e4e L |
4120 | prop->pr_kind = property_number; |
4121 | } | |
4122 | ||
4123 | if (isa_level) | |
4124 | { | |
4125 | /* If ISA level is set, add GNU_PROPERTY_X86_ISA_1_NEEDED. */ | |
4126 | prop = _bfd_elf_get_property (ebfd, | |
4127 | GNU_PROPERTY_X86_ISA_1_NEEDED, | |
4128 | 4); | |
4129 | prop->u.number |= isa_level; | |
241e64e3 L |
4130 | prop->pr_kind = property_number; |
4131 | } | |
a6798bab L |
4132 | |
4133 | /* Create the GNU property note section if needed. */ | |
241e64e3 | 4134 | if (prop != NULL && pbfd == NULL) |
a6798bab L |
4135 | { |
4136 | sec = bfd_make_section_with_flags (ebfd, | |
4137 | NOTE_GNU_PROPERTY_SECTION_NAME, | |
4138 | (SEC_ALLOC | |
4139 | | SEC_LOAD | |
4140 | | SEC_IN_MEMORY | |
4141 | | SEC_READONLY | |
4142 | | SEC_HAS_CONTENTS | |
4143 | | SEC_DATA)); | |
4144 | if (sec == NULL) | |
2c244f9b | 4145 | info->callbacks->einfo (_("%F%P: failed to create GNU property section\n")); |
a6798bab | 4146 | |
fd361982 | 4147 | if (!bfd_set_section_alignment (sec, class_align)) |
a6798bab | 4148 | { |
dc1e8a47 | 4149 | error_alignment: |
871b3ab2 | 4150 | info->callbacks->einfo (_("%F%pA: failed to align section\n"), |
a6798bab L |
4151 | sec); |
4152 | } | |
4153 | ||
4154 | elf_section_type (sec) = SHT_NOTE; | |
4155 | } | |
4156 | } | |
4157 | ||
279d901e L |
4158 | if (htab->params->cet_report |
4159 | || htab->params->lam_u48_report | |
4160 | || htab->params->lam_u57_report) | |
233a0083 | 4161 | { |
279d901e | 4162 | /* Report missing IBT, SHSTK and LAM properties. */ |
233a0083 | 4163 | bfd *abfd; |
279d901e L |
4164 | const char *warning_msg = _("%P: %pB: warning: missing %s\n"); |
4165 | const char *error_msg = _("%X%P: %pB: error: missing %s\n"); | |
4166 | const char *cet_msg = NULL; | |
4167 | const char *lam_u48_msg = NULL; | |
4168 | const char *lam_u57_msg = NULL; | |
4169 | const char *missing; | |
233a0083 | 4170 | elf_property_list *p; |
0a1b45a2 AM |
4171 | bool missing_ibt, missing_shstk; |
4172 | bool missing_lam_u48, missing_lam_u57; | |
4173 | bool check_ibt | |
279d901e L |
4174 | = (htab->params->cet_report |
4175 | && (htab->params->cet_report & prop_report_ibt)); | |
0a1b45a2 | 4176 | bool check_shstk |
279d901e L |
4177 | = (htab->params->cet_report |
4178 | && (htab->params->cet_report & prop_report_shstk)); | |
233a0083 | 4179 | |
279d901e L |
4180 | if (htab->params->cet_report) |
4181 | { | |
4182 | if ((htab->params->cet_report & prop_report_warning)) | |
4183 | cet_msg = warning_msg; | |
4184 | else | |
4185 | cet_msg = error_msg; | |
4186 | } | |
4187 | if (htab->params->lam_u48_report) | |
4188 | { | |
4189 | if ((htab->params->lam_u48_report & prop_report_warning)) | |
4190 | lam_u48_msg = warning_msg; | |
4191 | else | |
4192 | lam_u48_msg = error_msg; | |
4193 | } | |
4194 | if (htab->params->lam_u57_report) | |
4195 | { | |
4196 | if ((htab->params->lam_u57_report & prop_report_warning)) | |
4197 | lam_u57_msg = warning_msg; | |
4198 | else | |
4199 | lam_u57_msg = error_msg; | |
4200 | } | |
233a0083 L |
4201 | |
4202 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) | |
4203 | if (!(abfd->flags & (DYNAMIC | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
4204 | && bfd_get_flavour (abfd) == bfd_target_elf_flavour) | |
4205 | { | |
4206 | for (p = elf_properties (abfd); p; p = p->next) | |
4207 | if (p->property.pr_type == GNU_PROPERTY_X86_FEATURE_1_AND) | |
4208 | break; | |
4209 | ||
4210 | missing_ibt = check_ibt; | |
4211 | missing_shstk = check_shstk; | |
279d901e L |
4212 | missing_lam_u48 = !!lam_u48_msg; |
4213 | missing_lam_u57 = !!lam_u57_msg; | |
233a0083 L |
4214 | if (p) |
4215 | { | |
4216 | missing_ibt &= !(p->property.u.number | |
4217 | & GNU_PROPERTY_X86_FEATURE_1_IBT); | |
4218 | missing_shstk &= !(p->property.u.number | |
4219 | & GNU_PROPERTY_X86_FEATURE_1_SHSTK); | |
279d901e L |
4220 | missing_lam_u48 &= !(p->property.u.number |
4221 | & GNU_PROPERTY_X86_FEATURE_1_LAM_U48); | |
4222 | missing_lam_u57 &= !(p->property.u.number | |
4223 | & GNU_PROPERTY_X86_FEATURE_1_LAM_U57); | |
233a0083 L |
4224 | } |
4225 | if (missing_ibt || missing_shstk) | |
4226 | { | |
233a0083 L |
4227 | if (missing_ibt && missing_shstk) |
4228 | missing = _("IBT and SHSTK properties"); | |
4229 | else if (missing_ibt) | |
4230 | missing = _("IBT property"); | |
4231 | else | |
4232 | missing = _("SHSTK property"); | |
279d901e L |
4233 | info->callbacks->einfo (cet_msg, abfd, missing); |
4234 | } | |
4235 | if (missing_lam_u48) | |
4236 | { | |
4237 | missing = _("LAM_U48 property"); | |
4238 | info->callbacks->einfo (lam_u48_msg, abfd, missing); | |
4239 | } | |
4240 | if (missing_lam_u57) | |
4241 | { | |
4242 | missing = _("LAM_U57 property"); | |
4243 | info->callbacks->einfo (lam_u57_msg, abfd, missing); | |
233a0083 L |
4244 | } |
4245 | } | |
4246 | } | |
4247 | ||
a6798bab L |
4248 | pbfd = _bfd_elf_link_setup_gnu_properties (info); |
4249 | ||
1de031c8 L |
4250 | htab->r_info = init_table->r_info; |
4251 | htab->r_sym = init_table->r_sym; | |
7a382c1c L |
4252 | |
4253 | if (bfd_link_relocatable (info)) | |
4254 | return pbfd; | |
eeb2f20a | 4255 | |
851b6fa1 L |
4256 | htab->plt0_pad_byte = init_table->plt0_pad_byte; |
4257 | ||
5b9c07b2 | 4258 | use_ibt_plt = htab->params->ibtplt || htab->params->ibt; |
a6798bab L |
4259 | if (!use_ibt_plt && pbfd != NULL) |
4260 | { | |
4261 | /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */ | |
4262 | elf_property_list *p; | |
4263 | ||
4264 | /* The property list is sorted in order of type. */ | |
4265 | for (p = elf_properties (pbfd); p; p = p->next) | |
4266 | { | |
4267 | if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type) | |
4268 | { | |
4269 | use_ibt_plt = !!(p->property.u.number | |
4270 | & GNU_PROPERTY_X86_FEATURE_1_IBT); | |
4271 | break; | |
4272 | } | |
4273 | else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type) | |
4274 | break; | |
4275 | } | |
4276 | } | |
4277 | ||
4278 | dynobj = htab->elf.dynobj; | |
4279 | ||
4280 | /* Set htab->elf.dynobj here so that there is no need to check and | |
4281 | set it in check_relocs. */ | |
4282 | if (dynobj == NULL) | |
4283 | { | |
4284 | if (pbfd != NULL) | |
4285 | { | |
4286 | htab->elf.dynobj = pbfd; | |
4287 | dynobj = pbfd; | |
4288 | } | |
4289 | else | |
4290 | { | |
4291 | bfd *abfd; | |
4292 | ||
4293 | /* Find a normal input file to hold linker created | |
4294 | sections. */ | |
4295 | for (abfd = info->input_bfds; | |
4296 | abfd != NULL; | |
4297 | abfd = abfd->link.next) | |
4298 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
4299 | && (abfd->flags | |
e4e6a73d L |
4300 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0 |
4301 | && bed->relocs_compatible (abfd->xvec, | |
4302 | info->output_bfd->xvec)) | |
a6798bab L |
4303 | { |
4304 | htab->elf.dynobj = abfd; | |
4305 | dynobj = abfd; | |
4306 | break; | |
4307 | } | |
4308 | } | |
4309 | } | |
4310 | ||
851b6fa1 L |
4311 | /* Return if there are no normal input files. */ |
4312 | if (dynobj == NULL) | |
4313 | return pbfd; | |
4314 | ||
a6798bab L |
4315 | /* Even when lazy binding is disabled by "-z now", the PLT0 entry may |
4316 | still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for | |
4317 | canonical function address. */ | |
4318 | htab->plt.has_plt0 = 1; | |
832ca732 | 4319 | htab->plt.plt_indirect_branch_offset = 0; |
90c14f0c | 4320 | normal_target = htab->elf.target_os == is_normal; |
a6798bab L |
4321 | |
4322 | if (normal_target) | |
4323 | { | |
4324 | if (use_ibt_plt) | |
4325 | { | |
1de031c8 L |
4326 | htab->lazy_plt = init_table->lazy_ibt_plt; |
4327 | htab->non_lazy_plt = init_table->non_lazy_ibt_plt; | |
832ca732 | 4328 | htab->plt.plt_indirect_branch_offset = 4; |
a6798bab L |
4329 | } |
4330 | else | |
4331 | { | |
1de031c8 L |
4332 | htab->lazy_plt = init_table->lazy_plt; |
4333 | htab->non_lazy_plt = init_table->non_lazy_plt; | |
a6798bab L |
4334 | } |
4335 | } | |
4336 | else | |
4337 | { | |
1de031c8 | 4338 | htab->lazy_plt = init_table->lazy_plt; |
a6798bab L |
4339 | htab->non_lazy_plt = NULL; |
4340 | } | |
4341 | ||
4342 | pltsec = htab->elf.splt; | |
4343 | ||
a6798bab L |
4344 | if (htab->non_lazy_plt != NULL |
4345 | && (!htab->plt.has_plt0 || pltsec == NULL)) | |
cf0e0a0b IB |
4346 | lazy_plt = false; |
4347 | else | |
4348 | lazy_plt = true; | |
4349 | ||
4350 | if (normal_target) | |
4351 | { | |
4352 | if (use_ibt_plt) | |
4353 | { | |
4354 | if (lazy_plt) | |
4355 | htab->sframe_plt = init_table->sframe_lazy_ibt_plt; | |
4356 | else | |
4357 | htab->sframe_plt = init_table->sframe_non_lazy_ibt_plt; | |
4358 | } | |
4359 | else | |
4360 | { | |
4361 | if (lazy_plt) | |
4362 | htab->sframe_plt = init_table->sframe_lazy_plt; | |
4363 | else | |
4364 | htab->sframe_plt = init_table->sframe_non_lazy_plt; | |
4365 | } | |
4366 | } | |
4367 | else | |
4368 | htab->sframe_plt = NULL; | |
4369 | ||
4370 | /* If the non-lazy PLT is available, use it for all PLT entries if | |
4371 | there are no PLT0 or no .plt section. */ | |
4372 | if (!lazy_plt) | |
a6798bab | 4373 | { |
a6798bab L |
4374 | if (bfd_link_pic (info)) |
4375 | htab->plt.plt_entry = htab->non_lazy_plt->pic_plt_entry; | |
4376 | else | |
4377 | htab->plt.plt_entry = htab->non_lazy_plt->plt_entry; | |
4378 | htab->plt.plt_entry_size = htab->non_lazy_plt->plt_entry_size; | |
4379 | htab->plt.plt_got_offset = htab->non_lazy_plt->plt_got_offset; | |
4380 | htab->plt.plt_got_insn_size | |
4381 | = htab->non_lazy_plt->plt_got_insn_size; | |
4382 | htab->plt.eh_frame_plt_size | |
4383 | = htab->non_lazy_plt->eh_frame_plt_size; | |
4384 | htab->plt.eh_frame_plt = htab->non_lazy_plt->eh_frame_plt; | |
4385 | } | |
4386 | else | |
4387 | { | |
a6798bab L |
4388 | if (bfd_link_pic (info)) |
4389 | { | |
4390 | htab->plt.plt0_entry = htab->lazy_plt->pic_plt0_entry; | |
4391 | htab->plt.plt_entry = htab->lazy_plt->pic_plt_entry; | |
4392 | } | |
4393 | else | |
4394 | { | |
4395 | htab->plt.plt0_entry = htab->lazy_plt->plt0_entry; | |
4396 | htab->plt.plt_entry = htab->lazy_plt->plt_entry; | |
4397 | } | |
4398 | htab->plt.plt_entry_size = htab->lazy_plt->plt_entry_size; | |
4399 | htab->plt.plt_got_offset = htab->lazy_plt->plt_got_offset; | |
4400 | htab->plt.plt_got_insn_size | |
4401 | = htab->lazy_plt->plt_got_insn_size; | |
4402 | htab->plt.eh_frame_plt_size | |
4403 | = htab->lazy_plt->eh_frame_plt_size; | |
4404 | htab->plt.eh_frame_plt = htab->lazy_plt->eh_frame_plt; | |
4405 | } | |
4406 | ||
90c14f0c | 4407 | if (htab->elf.target_os == is_vxworks |
a6798bab L |
4408 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
4409 | &htab->srelplt2)) | |
4410 | { | |
2c244f9b | 4411 | info->callbacks->einfo (_("%F%P: failed to create VxWorks dynamic sections\n")); |
a6798bab L |
4412 | return pbfd; |
4413 | } | |
4414 | ||
4415 | /* Since create_dynamic_sections isn't always called, but GOT | |
4416 | relocations need GOT relocations, create them here so that we | |
4417 | don't need to do it in check_relocs. */ | |
4418 | if (htab->elf.sgot == NULL | |
4419 | && !_bfd_elf_create_got_section (dynobj, info)) | |
2c244f9b | 4420 | info->callbacks->einfo (_("%F%P: failed to create GOT sections\n")); |
a6798bab L |
4421 | |
4422 | got_align = (bed->target_id == X86_64_ELF_DATA) ? 3 : 2; | |
4423 | ||
4424 | /* Align .got and .got.plt sections to their entry size. Do it here | |
4425 | instead of in create_dynamic_sections so that they are always | |
4426 | properly aligned even if create_dynamic_sections isn't called. */ | |
4427 | sec = htab->elf.sgot; | |
fd361982 | 4428 | if (!bfd_set_section_alignment (sec, got_align)) |
a6798bab L |
4429 | goto error_alignment; |
4430 | ||
4431 | sec = htab->elf.sgotplt; | |
fd361982 | 4432 | if (!bfd_set_section_alignment (sec, got_align)) |
a6798bab L |
4433 | goto error_alignment; |
4434 | ||
4435 | /* Create the ifunc sections here so that check_relocs can be | |
4436 | simplified. */ | |
4437 | if (!_bfd_elf_create_ifunc_sections (dynobj, info)) | |
2c244f9b | 4438 | info->callbacks->einfo (_("%F%P: failed to create ifunc sections\n")); |
a6798bab L |
4439 | |
4440 | plt_alignment = bfd_log2 (htab->plt.plt_entry_size); | |
4441 | ||
4442 | if (pltsec != NULL) | |
4443 | { | |
4444 | /* Whe creating executable, set the contents of the .interp | |
4445 | section to the interpreter. */ | |
4446 | if (bfd_link_executable (info) && !info->nointerp) | |
4447 | { | |
4448 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
4449 | if (s == NULL) | |
4450 | abort (); | |
4451 | s->size = htab->dynamic_interpreter_size; | |
4452 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
4453 | htab->interp = s; | |
4454 | } | |
4455 | ||
a6798bab L |
4456 | if (normal_target) |
4457 | { | |
4458 | flagword pltflags = (bed->dynamic_sec_flags | |
4459 | | SEC_ALLOC | |
4460 | | SEC_CODE | |
4461 | | SEC_LOAD | |
4462 | | SEC_READONLY); | |
4463 | unsigned int non_lazy_plt_alignment | |
4464 | = bfd_log2 (htab->non_lazy_plt->plt_entry_size); | |
4465 | ||
4466 | sec = pltsec; | |
fd361982 | 4467 | if (!bfd_set_section_alignment (sec, plt_alignment)) |
a6798bab L |
4468 | goto error_alignment; |
4469 | ||
4470 | /* Create the GOT procedure linkage table. */ | |
4471 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
4472 | ".plt.got", | |
4473 | pltflags); | |
4474 | if (sec == NULL) | |
2c244f9b | 4475 | info->callbacks->einfo (_("%F%P: failed to create GOT PLT section\n")); |
a6798bab | 4476 | |
fd361982 | 4477 | if (!bfd_set_section_alignment (sec, non_lazy_plt_alignment)) |
a6798bab L |
4478 | goto error_alignment; |
4479 | ||
4480 | htab->plt_got = sec; | |
4481 | ||
4482 | if (lazy_plt) | |
4483 | { | |
4484 | sec = NULL; | |
4485 | ||
4486 | if (use_ibt_plt) | |
4487 | { | |
4488 | /* Create the second PLT for Intel IBT support. IBT | |
bbd19b19 | 4489 | PLT is needed only for lazy binding. */ |
a6798bab L |
4490 | sec = bfd_make_section_anyway_with_flags (dynobj, |
4491 | ".plt.sec", | |
4492 | pltflags); | |
4493 | if (sec == NULL) | |
2c244f9b | 4494 | info->callbacks->einfo (_("%F%P: failed to create IBT-enabled PLT section\n")); |
a6798bab | 4495 | |
fd361982 | 4496 | if (!bfd_set_section_alignment (sec, plt_alignment)) |
a6798bab L |
4497 | goto error_alignment; |
4498 | } | |
a6798bab L |
4499 | |
4500 | htab->plt_second = sec; | |
4501 | } | |
4502 | } | |
4503 | ||
4504 | if (!info->no_ld_generated_unwind_info) | |
4505 | { | |
4506 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
4507 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
4508 | | SEC_LINKER_CREATED); | |
4509 | ||
4510 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
4511 | ".eh_frame", | |
4512 | flags); | |
4513 | if (sec == NULL) | |
2c244f9b | 4514 | info->callbacks->einfo (_("%F%P: failed to create PLT .eh_frame section\n")); |
a6798bab | 4515 | |
fd361982 | 4516 | if (!bfd_set_section_alignment (sec, class_align)) |
a6798bab L |
4517 | goto error_alignment; |
4518 | ||
4519 | htab->plt_eh_frame = sec; | |
4520 | ||
4521 | if (htab->plt_got != NULL) | |
4522 | { | |
4523 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
4524 | ".eh_frame", | |
4525 | flags); | |
4526 | if (sec == NULL) | |
2c244f9b | 4527 | info->callbacks->einfo (_("%F%P: failed to create GOT PLT .eh_frame section\n")); |
a6798bab | 4528 | |
fd361982 | 4529 | if (!bfd_set_section_alignment (sec, class_align)) |
a6798bab L |
4530 | goto error_alignment; |
4531 | ||
4532 | htab->plt_got_eh_frame = sec; | |
4533 | } | |
4534 | ||
4535 | if (htab->plt_second != NULL) | |
4536 | { | |
4537 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
4538 | ".eh_frame", | |
4539 | flags); | |
4540 | if (sec == NULL) | |
2c244f9b | 4541 | info->callbacks->einfo (_("%F%P: failed to create the second PLT .eh_frame section\n")); |
a6798bab | 4542 | |
fd361982 | 4543 | if (!bfd_set_section_alignment (sec, class_align)) |
a6798bab L |
4544 | goto error_alignment; |
4545 | ||
4546 | htab->plt_second_eh_frame = sec; | |
4547 | } | |
4548 | } | |
cf0e0a0b IB |
4549 | |
4550 | /* .sframe sections are emitted for AMD64 ABI only. */ | |
4551 | if (ABI_64_P (info->output_bfd) && !info->no_ld_generated_unwind_info) | |
4552 | { | |
4553 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
4554 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
4555 | | SEC_LINKER_CREATED); | |
4556 | ||
4557 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
4558 | ".sframe", | |
4559 | flags); | |
4560 | if (sec == NULL) | |
4561 | info->callbacks->einfo (_("%F%P: failed to create PLT .sframe section\n")); | |
4562 | ||
4563 | // FIXME check this | |
4564 | // if (!bfd_set_section_alignment (sec, class_align)) | |
4565 | // goto error_alignment; | |
4566 | ||
4567 | htab->plt_sframe = sec; | |
4568 | ||
8ad93045 | 4569 | /* Second PLT is generated for Intel IBT + lazy plt. */ |
cf0e0a0b IB |
4570 | if (htab->plt_second != NULL) |
4571 | { | |
4572 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
4573 | ".sframe", | |
4574 | flags); | |
4575 | if (sec == NULL) | |
4576 | info->callbacks->einfo (_("%F%P: failed to create second PLT .sframe section\n")); | |
4577 | ||
4578 | htab->plt_second_sframe = sec; | |
4579 | } | |
4580 | /* FIXME - add later for plt_got. */ | |
4581 | } | |
a6798bab L |
4582 | } |
4583 | ||
b44ee3a8 L |
4584 | /* The .iplt section is used for IFUNC symbols in static |
4585 | executables. */ | |
4586 | sec = htab->elf.iplt; | |
4587 | if (sec != NULL) | |
a6798bab | 4588 | { |
b44ee3a8 L |
4589 | /* NB: Delay setting its alignment until we know it is non-empty. |
4590 | Otherwise an empty iplt section may change vma and lma of the | |
4591 | following sections, which triggers moving dot of the following | |
4592 | section backwards, resulting in a warning and section lma not | |
4593 | being set properly. It later leads to a "File truncated" | |
4594 | error. */ | |
fd361982 | 4595 | if (!bfd_set_section_alignment (sec, 0)) |
a6798bab | 4596 | goto error_alignment; |
b44ee3a8 L |
4597 | |
4598 | htab->plt.iplt_alignment = (normal_target | |
4599 | ? plt_alignment | |
4600 | : bed->plt_alignment); | |
a6798bab L |
4601 | } |
4602 | ||
74e10d17 L |
4603 | if (bfd_link_executable (info) |
4604 | && !info->nointerp | |
4605 | && !htab->params->has_dynamic_linker | |
4606 | && htab->params->static_before_all_inputs) | |
4607 | { | |
4608 | /* Report error for dynamic input objects if -static is passed at | |
4609 | command-line before all input files without --dynamic-linker | |
4610 | unless --no-dynamic-linker is used. */ | |
4611 | bfd *abfd; | |
4612 | ||
4613 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) | |
4614 | if ((abfd->flags & DYNAMIC)) | |
4615 | info->callbacks->einfo | |
4616 | (_("%X%P: attempted static link of dynamic object `%pB'\n"), | |
4617 | abfd); | |
4618 | } | |
4619 | ||
a6798bab L |
4620 | return pbfd; |
4621 | } | |
bfb1e8c1 L |
4622 | |
4623 | /* Fix up x86 GNU properties. */ | |
4624 | ||
4625 | void | |
0a59decb | 4626 | _bfd_x86_elf_link_fixup_gnu_properties |
279d901e | 4627 | (struct bfd_link_info *info, elf_property_list **listp) |
bfb1e8c1 L |
4628 | { |
4629 | elf_property_list *p; | |
4630 | ||
4631 | for (p = *listp; p; p = p->next) | |
a9eafb08 L |
4632 | { |
4633 | unsigned int type = p->property.pr_type; | |
4634 | if (type == GNU_PROPERTY_X86_COMPAT_ISA_1_USED | |
4635 | || type == GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED | |
4636 | || (type >= GNU_PROPERTY_X86_UINT32_AND_LO | |
4637 | && type <= GNU_PROPERTY_X86_UINT32_AND_HI) | |
4638 | || (type >= GNU_PROPERTY_X86_UINT32_OR_LO | |
4639 | && type <= GNU_PROPERTY_X86_UINT32_OR_HI) | |
4640 | || (type >= GNU_PROPERTY_X86_UINT32_OR_AND_LO | |
4641 | && type <= GNU_PROPERTY_X86_UINT32_OR_AND_HI)) | |
4642 | { | |
fde51dd1 L |
4643 | if (p->property.u.number == 0 |
4644 | && (type == GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED | |
4645 | || (type >= GNU_PROPERTY_X86_UINT32_AND_LO | |
4646 | && type <= GNU_PROPERTY_X86_UINT32_AND_HI) | |
4647 | || (type >= GNU_PROPERTY_X86_UINT32_OR_LO | |
4648 | && type <= GNU_PROPERTY_X86_UINT32_OR_HI))) | |
a9eafb08 L |
4649 | { |
4650 | /* Remove empty property. */ | |
4651 | *listp = p->next; | |
4652 | continue; | |
4653 | } | |
aa7bca9b | 4654 | |
279d901e L |
4655 | /* Keep LAM features only for 64-bit output. */ |
4656 | if (type == GNU_PROPERTY_X86_FEATURE_1_AND | |
4657 | && !ABI_64_P (info->output_bfd)) | |
4658 | p->property.u.number &= ~(GNU_PROPERTY_X86_FEATURE_1_LAM_U48 | |
4659 | | GNU_PROPERTY_X86_FEATURE_1_LAM_U57); | |
4660 | ||
a9eafb08 L |
4661 | listp = &p->next; |
4662 | } | |
4663 | else if (type > GNU_PROPERTY_HIPROC) | |
4664 | { | |
4665 | /* The property list is sorted in order of type. */ | |
4666 | break; | |
4667 | } | |
4668 | } | |
bfb1e8c1 | 4669 | } |
5b9c07b2 L |
4670 | |
4671 | void | |
4672 | _bfd_elf_linker_x86_set_options (struct bfd_link_info * info, | |
4673 | struct elf_linker_x86_params *params) | |
4674 | { | |
4675 | const struct elf_backend_data *bed | |
4676 | = get_elf_backend_data (info->output_bfd); | |
4677 | struct elf_x86_link_hash_table *htab | |
4678 | = elf_x86_hash_table (info, bed->target_id); | |
4679 | if (htab != NULL) | |
4680 | htab->params = params; | |
4681 | } |