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0afcef53 | 1 | /* x86 specific support for ELF |
219d1afa | 2 | Copyright (C) 2017-2018 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 L |
23 | #include "objalloc.h" |
24 | #include "elf/i386.h" | |
25 | #include "elf/x86-64.h" | |
26 | ||
27 | /* The name of the dynamic interpreter. This is put in the .interp | |
28 | section. */ | |
29 | ||
30 | #define ELF32_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
31 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" | |
32 | #define ELFX32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1" | |
0afcef53 | 33 | |
39946cc2 L |
34 | bfd_boolean |
35 | _bfd_x86_elf_mkobject (bfd *abfd) | |
36 | { | |
37 | return bfd_elf_allocate_object (abfd, | |
38 | sizeof (struct elf_x86_obj_tdata), | |
39 | get_elf_backend_data (abfd)->target_id); | |
40 | } | |
41 | ||
0afcef53 L |
42 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
43 | executables. Rather than setting it to the beginning of the TLS | |
44 | section, we have to set it to the end. This function may be called | |
45 | multiple times, it is idempotent. */ | |
46 | ||
47 | void | |
48 | _bfd_x86_elf_set_tls_module_base (struct bfd_link_info *info) | |
49 | { | |
50 | struct elf_x86_link_hash_table *htab; | |
51 | struct bfd_link_hash_entry *base; | |
52 | const struct elf_backend_data *bed; | |
53 | ||
54 | if (!bfd_link_executable (info)) | |
55 | return; | |
56 | ||
57 | bed = get_elf_backend_data (info->output_bfd); | |
58 | htab = elf_x86_hash_table (info, bed->target_id); | |
59 | if (htab == NULL) | |
60 | return; | |
61 | ||
62 | base = htab->tls_module_base; | |
63 | if (base == NULL) | |
64 | return; | |
65 | ||
66 | base->u.def.value = htab->elf.tls_size; | |
67 | } | |
68 | ||
69 | /* Return the base VMA address which should be subtracted from real addresses | |
70 | when resolving @dtpoff relocation. | |
71 | This is PT_TLS segment p_vaddr. */ | |
72 | ||
73 | bfd_vma | |
74 | _bfd_x86_elf_dtpoff_base (struct bfd_link_info *info) | |
75 | { | |
76 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
77 | if (elf_hash_table (info)->tls_sec == NULL) | |
78 | return 0; | |
79 | return elf_hash_table (info)->tls_sec->vma; | |
80 | } | |
81 | ||
b9ce864c L |
82 | /* Allocate space in .plt, .got and associated reloc sections for |
83 | dynamic relocs. */ | |
84 | ||
5e2ac45d | 85 | static bfd_boolean |
70090aa5 | 86 | elf_x86_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
b9ce864c L |
87 | { |
88 | struct bfd_link_info *info; | |
89 | struct elf_x86_link_hash_table *htab; | |
90 | struct elf_x86_link_hash_entry *eh; | |
91 | struct elf_dyn_relocs *p; | |
92 | unsigned int plt_entry_size; | |
93 | bfd_boolean resolved_to_zero; | |
94 | const struct elf_backend_data *bed; | |
95 | ||
96 | if (h->root.type == bfd_link_hash_indirect) | |
97 | return TRUE; | |
98 | ||
99 | eh = (struct elf_x86_link_hash_entry *) h; | |
100 | ||
101 | info = (struct bfd_link_info *) inf; | |
102 | bed = get_elf_backend_data (info->output_bfd); | |
103 | htab = elf_x86_hash_table (info, bed->target_id); | |
104 | if (htab == NULL) | |
105 | return FALSE; | |
106 | ||
107 | plt_entry_size = htab->plt.plt_entry_size; | |
108 | ||
c5bce5c6 | 109 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
b9ce864c | 110 | |
b9ce864c L |
111 | /* We can't use the GOT PLT if pointer equality is needed since |
112 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
113 | linker won't update the GOT slot. We will get into an infinite | |
114 | loop at run-time. */ | |
115 | if (htab->plt_got != NULL | |
116 | && h->type != STT_GNU_IFUNC | |
117 | && !h->pointer_equality_needed | |
118 | && h->plt.refcount > 0 | |
119 | && h->got.refcount > 0) | |
120 | { | |
121 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
07d6d2b8 | 122 | reloctions. */ |
b9ce864c L |
123 | h->plt.offset = (bfd_vma) -1; |
124 | ||
125 | /* Use the GOT PLT. */ | |
126 | eh->plt_got.refcount = 1; | |
127 | } | |
128 | ||
129 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it | |
130 | here if it is defined and referenced in a non-shared object. */ | |
131 | if (h->type == STT_GNU_IFUNC | |
132 | && h->def_regular) | |
133 | { | |
134 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, | |
135 | &htab->readonly_dynrelocs_against_ifunc, | |
136 | plt_entry_size, | |
137 | (htab->plt.has_plt0 | |
138 | * plt_entry_size), | |
139 | htab->got_entry_size, | |
140 | TRUE)) | |
141 | { | |
142 | asection *s = htab->plt_second; | |
143 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
144 | { | |
145 | /* Use the second PLT section if it is created. */ | |
146 | eh->plt_second.offset = s->size; | |
147 | ||
148 | /* Make room for this entry in the second PLT section. */ | |
149 | s->size += htab->non_lazy_plt->plt_entry_size; | |
150 | } | |
151 | ||
152 | return TRUE; | |
153 | } | |
154 | else | |
155 | return FALSE; | |
156 | } | |
157 | /* Don't create the PLT entry if there are only function pointer | |
158 | relocations which can be resolved at run-time. */ | |
159 | else if (htab->elf.dynamic_sections_created | |
79b0c981 | 160 | && (h->plt.refcount > 0 |
b9ce864c L |
161 | || eh->plt_got.refcount > 0)) |
162 | { | |
163 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; | |
164 | ||
b9ce864c L |
165 | /* Make sure this symbol is output as a dynamic symbol. |
166 | Undefined weak syms won't yet be marked as dynamic. */ | |
167 | if (h->dynindx == -1 | |
168 | && !h->forced_local | |
169 | && !resolved_to_zero | |
170 | && h->root.type == bfd_link_hash_undefweak) | |
171 | { | |
172 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
173 | return FALSE; | |
174 | } | |
175 | ||
176 | if (bfd_link_pic (info) | |
177 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
178 | { | |
179 | asection *s = htab->elf.splt; | |
180 | asection *second_s = htab->plt_second; | |
181 | asection *got_s = htab->plt_got; | |
182 | ||
183 | /* If this is the first .plt entry, make room for the special | |
184 | first entry. The .plt section is used by prelink to undo | |
185 | prelinking for dynamic relocations. */ | |
186 | if (s->size == 0) | |
187 | s->size = htab->plt.has_plt0 * plt_entry_size; | |
188 | ||
189 | if (use_plt_got) | |
190 | eh->plt_got.offset = got_s->size; | |
191 | else | |
192 | { | |
193 | h->plt.offset = s->size; | |
194 | if (second_s) | |
195 | eh->plt_second.offset = second_s->size; | |
196 | } | |
197 | ||
198 | /* If this symbol is not defined in a regular file, and we are | |
199 | not generating a shared library, then set the symbol to this | |
200 | location in the .plt. This is required to make function | |
201 | pointers compare as equal between the normal executable and | |
202 | the shared library. */ | |
203 | if (! bfd_link_pic (info) | |
204 | && !h->def_regular) | |
205 | { | |
206 | if (use_plt_got) | |
207 | { | |
208 | /* We need to make a call to the entry of the GOT PLT | |
209 | instead of regular PLT entry. */ | |
210 | h->root.u.def.section = got_s; | |
211 | h->root.u.def.value = eh->plt_got.offset; | |
212 | } | |
213 | else | |
214 | { | |
215 | if (second_s) | |
216 | { | |
217 | /* We need to make a call to the entry of the | |
218 | second PLT instead of regular PLT entry. */ | |
219 | h->root.u.def.section = second_s; | |
220 | h->root.u.def.value = eh->plt_second.offset; | |
221 | } | |
222 | else | |
223 | { | |
224 | h->root.u.def.section = s; | |
225 | h->root.u.def.value = h->plt.offset; | |
226 | } | |
227 | } | |
228 | } | |
229 | ||
230 | /* Make room for this entry. */ | |
231 | if (use_plt_got) | |
232 | got_s->size += htab->non_lazy_plt->plt_entry_size; | |
233 | else | |
234 | { | |
235 | s->size += plt_entry_size; | |
236 | if (second_s) | |
237 | second_s->size += htab->non_lazy_plt->plt_entry_size; | |
238 | ||
239 | /* We also need to make an entry in the .got.plt section, | |
240 | which will be placed in the .got section by the linker | |
241 | script. */ | |
242 | htab->elf.sgotplt->size += htab->got_entry_size; | |
243 | ||
244 | /* There should be no PLT relocation against resolved | |
245 | undefined weak symbol in executable. */ | |
246 | if (!resolved_to_zero) | |
247 | { | |
248 | /* We also need to make an entry in the .rel.plt | |
249 | section. */ | |
250 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
251 | htab->elf.srelplt->reloc_count++; | |
252 | } | |
253 | } | |
254 | ||
851b6fa1 | 255 | if (htab->target_os == is_vxworks && !bfd_link_pic (info)) |
b9ce864c L |
256 | { |
257 | /* VxWorks has a second set of relocations for each PLT entry | |
258 | in executables. They go in a separate relocation section, | |
259 | which is processed by the kernel loader. */ | |
260 | ||
261 | /* There are two relocations for the initial PLT entry: an | |
262 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
263 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
264 | ||
265 | asection *srelplt2 = htab->srelplt2; | |
266 | if (h->plt.offset == plt_entry_size) | |
267 | srelplt2->size += (htab->sizeof_reloc * 2); | |
268 | ||
269 | /* There are two extra relocations for each subsequent PLT entry: | |
270 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
271 | relocation for the PLT entry. */ | |
272 | ||
273 | srelplt2->size += (htab->sizeof_reloc * 2); | |
274 | } | |
275 | } | |
276 | else | |
277 | { | |
278 | eh->plt_got.offset = (bfd_vma) -1; | |
279 | h->plt.offset = (bfd_vma) -1; | |
280 | h->needs_plt = 0; | |
281 | } | |
282 | } | |
283 | else | |
284 | { | |
285 | eh->plt_got.offset = (bfd_vma) -1; | |
286 | h->plt.offset = (bfd_vma) -1; | |
287 | h->needs_plt = 0; | |
288 | } | |
289 | ||
290 | eh->tlsdesc_got = (bfd_vma) -1; | |
291 | ||
292 | /* For i386, if R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the | |
293 | binary, make it a R_386_TLS_LE_32 requiring no TLS entry. For | |
294 | x86-64, if R_X86_64_GOTTPOFF symbol is now local to the binary, | |
295 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
296 | if (h->got.refcount > 0 | |
297 | && bfd_link_executable (info) | |
298 | && h->dynindx == -1 | |
299 | && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE)) | |
300 | h->got.offset = (bfd_vma) -1; | |
301 | else if (h->got.refcount > 0) | |
302 | { | |
303 | asection *s; | |
304 | bfd_boolean dyn; | |
305 | int tls_type = elf_x86_hash_entry (h)->tls_type; | |
306 | ||
307 | /* Make sure this symbol is output as a dynamic symbol. | |
308 | Undefined weak syms won't yet be marked as dynamic. */ | |
309 | if (h->dynindx == -1 | |
310 | && !h->forced_local | |
311 | && !resolved_to_zero | |
312 | && h->root.type == bfd_link_hash_undefweak) | |
313 | { | |
314 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
315 | return FALSE; | |
316 | } | |
317 | ||
318 | s = htab->elf.sgot; | |
319 | if (GOT_TLS_GDESC_P (tls_type)) | |
320 | { | |
321 | eh->tlsdesc_got = htab->elf.sgotplt->size | |
322 | - elf_x86_compute_jump_table_size (htab); | |
323 | htab->elf.sgotplt->size += 2 * htab->got_entry_size; | |
324 | h->got.offset = (bfd_vma) -2; | |
325 | } | |
326 | if (! GOT_TLS_GDESC_P (tls_type) | |
327 | || GOT_TLS_GD_P (tls_type)) | |
328 | { | |
329 | h->got.offset = s->size; | |
330 | s->size += htab->got_entry_size; | |
331 | /* R_386_TLS_GD and R_X86_64_TLSGD need 2 consecutive GOT | |
332 | slots. */ | |
333 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
334 | s->size += htab->got_entry_size; | |
335 | } | |
336 | dyn = htab->elf.dynamic_sections_created; | |
337 | /* R_386_TLS_IE_32 needs one dynamic relocation, | |
338 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, | |
339 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
340 | need two), R_386_TLS_GD and R_X86_64_TLSGD need one if local | |
341 | symbol and two if global. No dynamic relocation against | |
342 | resolved undefined weak symbol in executable. */ | |
343 | if (tls_type == GOT_TLS_IE_BOTH) | |
344 | htab->elf.srelgot->size += 2 * htab->sizeof_reloc; | |
345 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) | |
346 | || (tls_type & GOT_TLS_IE)) | |
347 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
348 | else if (GOT_TLS_GD_P (tls_type)) | |
349 | htab->elf.srelgot->size += 2 * htab->sizeof_reloc; | |
350 | else if (! GOT_TLS_GDESC_P (tls_type) | |
351 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
352 | && !resolved_to_zero) | |
353 | || h->root.type != bfd_link_hash_undefweak) | |
354 | && (bfd_link_pic (info) | |
355 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
356 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
357 | if (GOT_TLS_GDESC_P (tls_type)) | |
0e30d991 L |
358 | { |
359 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
360 | if (bed->target_id == X86_64_ELF_DATA) | |
361 | htab->tlsdesc_plt = (bfd_vma) -1; | |
362 | } | |
b9ce864c L |
363 | } |
364 | else | |
365 | h->got.offset = (bfd_vma) -1; | |
366 | ||
367 | if (eh->dyn_relocs == NULL) | |
368 | return TRUE; | |
369 | ||
370 | /* In the shared -Bsymbolic case, discard space allocated for | |
371 | dynamic pc-relative relocs against symbols which turn out to be | |
372 | defined in regular objects. For the normal shared case, discard | |
373 | space for pc-relative relocs that have become local due to symbol | |
374 | visibility changes. */ | |
375 | ||
376 | if (bfd_link_pic (info)) | |
377 | { | |
378 | /* Relocs that use pc_count are those that appear on a call | |
379 | insn, or certain REL relocs that can generated via assembly. | |
380 | We want calls to protected symbols to resolve directly to the | |
381 | function rather than going via the plt. If people want | |
382 | function pointer comparisons to work as expected then they | |
383 | should avoid writing weird assembly. */ | |
384 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
385 | { | |
386 | struct elf_dyn_relocs **pp; | |
387 | ||
388 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
389 | { | |
390 | p->count -= p->pc_count; | |
391 | p->pc_count = 0; | |
392 | if (p->count == 0) | |
393 | *pp = p->next; | |
394 | else | |
395 | pp = &p->next; | |
396 | } | |
397 | } | |
398 | ||
851b6fa1 | 399 | if (htab->target_os == is_vxworks) |
b9ce864c L |
400 | { |
401 | struct elf_dyn_relocs **pp; | |
402 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
403 | { | |
404 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
405 | *pp = p->next; | |
406 | else | |
407 | pp = &p->next; | |
408 | } | |
409 | } | |
410 | ||
411 | /* Also discard relocs on undefined weak syms with non-default | |
412 | visibility or in PIE. */ | |
413 | if (eh->dyn_relocs != NULL) | |
414 | { | |
415 | if (h->root.type == bfd_link_hash_undefweak) | |
416 | { | |
417 | /* Undefined weak symbol is never bound locally in shared | |
418 | library. */ | |
419 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
420 | || resolved_to_zero) | |
421 | { | |
422 | if (bed->target_id == I386_ELF_DATA | |
423 | && h->non_got_ref) | |
424 | { | |
425 | /* Keep dynamic non-GOT/non-PLT relocation so | |
426 | that we can branch to 0 without PLT. */ | |
427 | struct elf_dyn_relocs **pp; | |
428 | ||
429 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
430 | if (p->pc_count == 0) | |
431 | *pp = p->next; | |
432 | else | |
433 | { | |
434 | /* Remove non-R_386_PC32 relocation. */ | |
435 | p->count = p->pc_count; | |
436 | pp = &p->next; | |
437 | } | |
438 | ||
439 | /* Make sure undefined weak symbols are output | |
440 | as dynamic symbols in PIEs for dynamic non-GOT | |
441 | non-PLT reloations. */ | |
442 | if (eh->dyn_relocs != NULL | |
443 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
444 | return FALSE; | |
445 | } | |
446 | else | |
447 | eh->dyn_relocs = NULL; | |
448 | } | |
449 | else if (h->dynindx == -1 | |
450 | && !h->forced_local | |
451 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
452 | return FALSE; | |
453 | } | |
454 | else if (bfd_link_executable (info) | |
455 | && (h->needs_copy || eh->needs_copy) | |
456 | && h->def_dynamic | |
457 | && !h->def_regular) | |
458 | { | |
459 | /* NB: needs_copy is set only for x86-64. For PIE, | |
460 | discard space for pc-relative relocs against symbols | |
461 | which turn out to need copy relocs. */ | |
462 | struct elf_dyn_relocs **pp; | |
463 | ||
464 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
465 | { | |
466 | if (p->pc_count != 0) | |
467 | *pp = p->next; | |
468 | else | |
469 | pp = &p->next; | |
470 | } | |
471 | } | |
472 | } | |
473 | } | |
474 | else if (ELIMINATE_COPY_RELOCS) | |
475 | { | |
476 | /* For the non-shared case, discard space for relocs against | |
477 | symbols which turn out to need copy relocs or are not | |
478 | dynamic. Keep dynamic relocations for run-time function | |
479 | pointer initialization. */ | |
480 | ||
481 | if ((!h->non_got_ref | |
b9ce864c L |
482 | || (h->root.type == bfd_link_hash_undefweak |
483 | && !resolved_to_zero)) | |
484 | && ((h->def_dynamic | |
485 | && !h->def_regular) | |
486 | || (htab->elf.dynamic_sections_created | |
487 | && (h->root.type == bfd_link_hash_undefweak | |
488 | || h->root.type == bfd_link_hash_undefined)))) | |
489 | { | |
490 | /* Make sure this symbol is output as a dynamic symbol. | |
491 | Undefined weak syms won't yet be marked as dynamic. */ | |
492 | if (h->dynindx == -1 | |
493 | && !h->forced_local | |
494 | && !resolved_to_zero | |
495 | && h->root.type == bfd_link_hash_undefweak | |
496 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
497 | return FALSE; | |
498 | ||
499 | /* If that succeeded, we know we'll be keeping all the | |
500 | relocs. */ | |
501 | if (h->dynindx != -1) | |
502 | goto keep; | |
503 | } | |
504 | ||
505 | eh->dyn_relocs = NULL; | |
b9ce864c L |
506 | |
507 | keep: ; | |
508 | } | |
509 | ||
510 | /* Finally, allocate space. */ | |
511 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
512 | { | |
513 | asection *sreloc; | |
514 | ||
515 | sreloc = elf_section_data (p->sec)->sreloc; | |
516 | ||
517 | BFD_ASSERT (sreloc != NULL); | |
518 | sreloc->size += p->count * htab->sizeof_reloc; | |
519 | } | |
520 | ||
521 | return TRUE; | |
522 | } | |
523 | ||
826c3f1e | 524 | /* Find dynamic relocs for H that apply to read-only sections. */ |
0afcef53 | 525 | |
826c3f1e AM |
526 | static asection * |
527 | readonly_dynrelocs (struct elf_link_hash_entry *h) | |
0afcef53 | 528 | { |
0afcef53 L |
529 | struct elf_dyn_relocs *p; |
530 | ||
826c3f1e | 531 | for (p = elf_x86_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
0afcef53 L |
532 | { |
533 | asection *s = p->sec->output_section; | |
534 | ||
535 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
826c3f1e AM |
536 | return p->sec; |
537 | } | |
538 | return NULL; | |
539 | } | |
0afcef53 | 540 | |
826c3f1e AM |
541 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
542 | read-only sections. */ | |
0afcef53 | 543 | |
826c3f1e AM |
544 | static bfd_boolean |
545 | maybe_set_textrel (struct elf_link_hash_entry *h, void *inf) | |
546 | { | |
547 | asection *sec; | |
0afcef53 | 548 | |
826c3f1e AM |
549 | if (h->root.type == bfd_link_hash_indirect) |
550 | return TRUE; | |
551 | ||
552 | /* Skip local IFUNC symbols. */ | |
553 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
554 | return TRUE; | |
555 | ||
556 | sec = readonly_dynrelocs (h); | |
557 | if (sec != NULL) | |
558 | { | |
559 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
560 | ||
561 | info->flags |= DF_TEXTREL; | |
562 | /* xgettext:c-format */ | |
563 | info->callbacks->minfo (_("%B: dynamic relocation against `%T' " | |
564 | "in read-only section `%A'\n"), | |
565 | sec->owner, h->root.root.string, sec); | |
566 | ||
567 | if ((info->warn_shared_textrel && bfd_link_pic (info)) | |
568 | || info->error_textrel) | |
569 | /* xgettext:c-format */ | |
570 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' " | |
571 | "in read-only section `%A'\n"), | |
572 | sec->owner, h->root.root.string, sec); | |
573 | ||
574 | /* Not an error, just cut short the traversal. */ | |
575 | return FALSE; | |
0afcef53 L |
576 | } |
577 | return TRUE; | |
578 | } | |
579 | ||
b9ce864c L |
580 | /* Allocate space in .plt, .got and associated reloc sections for |
581 | local dynamic relocs. */ | |
582 | ||
5e2ac45d L |
583 | static bfd_boolean |
584 | elf_x86_allocate_local_dynreloc (void **slot, void *inf) | |
b9ce864c L |
585 | { |
586 | struct elf_link_hash_entry *h | |
587 | = (struct elf_link_hash_entry *) *slot; | |
588 | ||
589 | if (h->type != STT_GNU_IFUNC | |
590 | || !h->def_regular | |
591 | || !h->ref_regular | |
592 | || !h->forced_local | |
593 | || h->root.type != bfd_link_hash_defined) | |
594 | abort (); | |
595 | ||
5e2ac45d | 596 | return elf_x86_allocate_dynrelocs (h, inf); |
b9ce864c L |
597 | } |
598 | ||
0afcef53 L |
599 | /* Find and/or create a hash entry for local symbol. */ |
600 | ||
601 | struct elf_link_hash_entry * | |
602 | _bfd_elf_x86_get_local_sym_hash (struct elf_x86_link_hash_table *htab, | |
603 | bfd *abfd, const Elf_Internal_Rela *rel, | |
604 | bfd_boolean create) | |
605 | { | |
606 | struct elf_x86_link_hash_entry e, *ret; | |
607 | asection *sec = abfd->sections; | |
608 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, | |
609 | htab->r_sym (rel->r_info)); | |
610 | void **slot; | |
611 | ||
612 | e.elf.indx = sec->id; | |
613 | e.elf.dynstr_index = htab->r_sym (rel->r_info); | |
614 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
615 | create ? INSERT : NO_INSERT); | |
616 | ||
617 | if (!slot) | |
618 | return NULL; | |
619 | ||
620 | if (*slot) | |
621 | { | |
622 | ret = (struct elf_x86_link_hash_entry *) *slot; | |
623 | return &ret->elf; | |
624 | } | |
625 | ||
626 | ret = (struct elf_x86_link_hash_entry *) | |
627 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
628 | sizeof (struct elf_x86_link_hash_entry)); | |
629 | if (ret) | |
630 | { | |
631 | memset (ret, 0, sizeof (*ret)); | |
632 | ret->elf.indx = sec->id; | |
633 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); | |
634 | ret->elf.dynindx = -1; | |
635 | ret->plt_got.offset = (bfd_vma) -1; | |
636 | *slot = ret; | |
637 | } | |
638 | return &ret->elf; | |
639 | } | |
640 | ||
641 | /* Create an entry in a x86 ELF linker hash table. NB: THIS MUST BE IN | |
642 | SYNC WITH _bfd_elf_link_hash_newfunc. */ | |
643 | ||
644 | struct bfd_hash_entry * | |
645 | _bfd_x86_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
646 | struct bfd_hash_table *table, | |
647 | const char *string) | |
648 | { | |
649 | /* Allocate the structure if it has not already been allocated by a | |
650 | subclass. */ | |
651 | if (entry == NULL) | |
652 | { | |
653 | entry = (struct bfd_hash_entry *) | |
654 | bfd_hash_allocate (table, | |
655 | sizeof (struct elf_x86_link_hash_entry)); | |
656 | if (entry == NULL) | |
657 | return entry; | |
658 | } | |
659 | ||
660 | /* Call the allocation method of the superclass. */ | |
661 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
662 | if (entry != NULL) | |
663 | { | |
664 | struct elf_x86_link_hash_entry *eh | |
665 | = (struct elf_x86_link_hash_entry *) entry; | |
666 | struct elf_link_hash_table *htab | |
667 | = (struct elf_link_hash_table *) table; | |
668 | ||
669 | memset (&eh->elf.size, 0, | |
670 | (sizeof (struct elf_x86_link_hash_entry) | |
671 | - offsetof (struct elf_link_hash_entry, size))); | |
672 | /* Set local fields. */ | |
673 | eh->elf.indx = -1; | |
674 | eh->elf.dynindx = -1; | |
675 | eh->elf.got = htab->init_got_refcount; | |
676 | eh->elf.plt = htab->init_plt_refcount; | |
677 | /* Assume that we have been called by a non-ELF symbol reader. | |
678 | This flag is then reset by the code which reads an ELF input | |
679 | file. This ensures that a symbol created by a non-ELF symbol | |
680 | reader will have the flag set correctly. */ | |
681 | eh->elf.non_elf = 1; | |
682 | eh->plt_second.offset = (bfd_vma) -1; | |
683 | eh->plt_got.offset = (bfd_vma) -1; | |
684 | eh->tlsdesc_got = (bfd_vma) -1; | |
98b273dc | 685 | eh->zero_undefweak = 1; |
0afcef53 L |
686 | } |
687 | ||
688 | return entry; | |
689 | } | |
690 | ||
691 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry | |
692 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
693 | as global symbol. We reuse indx and dynstr_index for local symbol | |
694 | hash since they aren't used by global symbols in this backend. */ | |
695 | ||
696 | hashval_t | |
697 | _bfd_x86_elf_local_htab_hash (const void *ptr) | |
698 | { | |
699 | struct elf_link_hash_entry *h | |
700 | = (struct elf_link_hash_entry *) ptr; | |
701 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); | |
702 | } | |
703 | ||
704 | /* Compare local hash entries. */ | |
705 | ||
706 | int | |
707 | _bfd_x86_elf_local_htab_eq (const void *ptr1, const void *ptr2) | |
708 | { | |
709 | struct elf_link_hash_entry *h1 | |
710 | = (struct elf_link_hash_entry *) ptr1; | |
711 | struct elf_link_hash_entry *h2 | |
712 | = (struct elf_link_hash_entry *) ptr2; | |
713 | ||
714 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
715 | } | |
716 | ||
717 | /* Destroy an x86 ELF linker hash table. */ | |
718 | ||
765e526c L |
719 | static void |
720 | elf_x86_link_hash_table_free (bfd *obfd) | |
0afcef53 L |
721 | { |
722 | struct elf_x86_link_hash_table *htab | |
723 | = (struct elf_x86_link_hash_table *) obfd->link.hash; | |
724 | ||
725 | if (htab->loc_hash_table) | |
726 | htab_delete (htab->loc_hash_table); | |
727 | if (htab->loc_hash_memory) | |
728 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
729 | _bfd_elf_link_hash_table_free (obfd); | |
730 | } | |
731 | ||
5e2ac45d L |
732 | static bfd_boolean |
733 | elf_i386_is_reloc_section (const char *secname) | |
734 | { | |
735 | return CONST_STRNEQ (secname, ".rel"); | |
736 | } | |
737 | ||
5e2ac45d L |
738 | static bfd_boolean |
739 | elf_x86_64_is_reloc_section (const char *secname) | |
740 | { | |
741 | return CONST_STRNEQ (secname, ".rela"); | |
742 | } | |
5e2ac45d | 743 | |
765e526c L |
744 | /* Create an x86 ELF linker hash table. */ |
745 | ||
746 | struct bfd_link_hash_table * | |
747 | _bfd_x86_elf_link_hash_table_create (bfd *abfd) | |
748 | { | |
749 | struct elf_x86_link_hash_table *ret; | |
750 | const struct elf_backend_data *bed; | |
751 | bfd_size_type amt = sizeof (struct elf_x86_link_hash_table); | |
752 | ||
753 | ret = (struct elf_x86_link_hash_table *) bfd_zmalloc (amt); | |
754 | if (ret == NULL) | |
755 | return NULL; | |
756 | ||
757 | bed = get_elf_backend_data (abfd); | |
758 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
759 | _bfd_x86_elf_link_hash_newfunc, | |
760 | sizeof (struct elf_x86_link_hash_entry), | |
761 | bed->target_id)) | |
762 | { | |
763 | free (ret); | |
764 | return NULL; | |
765 | } | |
766 | ||
5e2ac45d L |
767 | if (bed->target_id == X86_64_ELF_DATA) |
768 | { | |
5e2ac45d L |
769 | ret->is_reloc_section = elf_x86_64_is_reloc_section; |
770 | ret->dt_reloc = DT_RELA; | |
771 | ret->dt_reloc_sz = DT_RELASZ; | |
772 | ret->dt_reloc_ent = DT_RELAENT; | |
773 | ret->got_entry_size = 8; | |
f04bdfa7 | 774 | ret->tls_get_addr = "__tls_get_addr"; |
5e2ac45d | 775 | } |
765e526c L |
776 | if (ABI_64_P (abfd)) |
777 | { | |
503294e7 | 778 | ret->sizeof_reloc = sizeof (Elf64_External_Rela); |
765e526c L |
779 | ret->pointer_r_type = R_X86_64_64; |
780 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; | |
781 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
765e526c L |
782 | } |
783 | else | |
765e526c | 784 | { |
5b86dbf4 | 785 | if (bed->target_id == X86_64_ELF_DATA) |
765e526c | 786 | { |
503294e7 | 787 | ret->sizeof_reloc = sizeof (Elf32_External_Rela); |
765e526c L |
788 | ret->pointer_r_type = R_X86_64_32; |
789 | ret->dynamic_interpreter = ELFX32_DYNAMIC_INTERPRETER; | |
790 | ret->dynamic_interpreter_size | |
791 | = sizeof ELFX32_DYNAMIC_INTERPRETER; | |
765e526c L |
792 | } |
793 | else | |
794 | { | |
5e2ac45d L |
795 | ret->is_reloc_section = elf_i386_is_reloc_section; |
796 | ret->dt_reloc = DT_REL; | |
797 | ret->dt_reloc_sz = DT_RELSZ; | |
798 | ret->dt_reloc_ent = DT_RELENT; | |
503294e7 | 799 | ret->sizeof_reloc = sizeof (Elf32_External_Rel); |
9ff114ca | 800 | ret->got_entry_size = 4; |
765e526c L |
801 | ret->pointer_r_type = R_386_32; |
802 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; | |
803 | ret->dynamic_interpreter_size | |
804 | = sizeof ELF32_DYNAMIC_INTERPRETER; | |
805 | ret->tls_get_addr = "___tls_get_addr"; | |
806 | } | |
807 | } | |
fe53b4a4 | 808 | ret->target_id = bed->target_id; |
851b6fa1 | 809 | ret->target_os = get_elf_x86_backend_data (abfd)->target_os; |
765e526c L |
810 | |
811 | ret->loc_hash_table = htab_try_create (1024, | |
812 | _bfd_x86_elf_local_htab_hash, | |
813 | _bfd_x86_elf_local_htab_eq, | |
814 | NULL); | |
815 | ret->loc_hash_memory = objalloc_create (); | |
816 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
817 | { | |
818 | elf_x86_link_hash_table_free (abfd); | |
819 | return NULL; | |
820 | } | |
821 | ret->elf.root.hash_table_free = elf_x86_link_hash_table_free; | |
822 | ||
823 | return &ret->elf.root; | |
824 | } | |
825 | ||
0afcef53 L |
826 | /* Sort relocs into address order. */ |
827 | ||
828 | int | |
829 | _bfd_x86_elf_compare_relocs (const void *ap, const void *bp) | |
830 | { | |
831 | const arelent *a = * (const arelent **) ap; | |
832 | const arelent *b = * (const arelent **) bp; | |
833 | ||
834 | if (a->address > b->address) | |
835 | return 1; | |
836 | else if (a->address < b->address) | |
837 | return -1; | |
838 | else | |
839 | return 0; | |
840 | } | |
841 | ||
842 | bfd_boolean | |
843 | _bfd_x86_elf_link_check_relocs (bfd *abfd, struct bfd_link_info *info) | |
844 | { | |
845 | if (!bfd_link_relocatable (info)) | |
846 | { | |
847 | /* Check for __tls_get_addr reference. */ | |
848 | struct elf_x86_link_hash_table *htab; | |
849 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
850 | htab = elf_x86_hash_table (info, bed->target_id); | |
851 | if (htab) | |
852 | { | |
0a27fed7 L |
853 | struct elf_link_hash_entry *h; |
854 | ||
855 | h = elf_link_hash_lookup (elf_hash_table (info), | |
0afcef53 L |
856 | htab->tls_get_addr, |
857 | FALSE, FALSE, FALSE); | |
858 | if (h != NULL) | |
0a27fed7 L |
859 | elf_x86_hash_entry (h)->tls_get_addr = 1; |
860 | ||
861 | /* "__ehdr_start" will be defined by linker as a hidden symbol | |
862 | later if it is referenced and not defined. */ | |
863 | h = elf_link_hash_lookup (elf_hash_table (info), | |
864 | "__ehdr_start", | |
865 | FALSE, FALSE, FALSE); | |
866 | if (h != NULL | |
867 | && (h->root.type == bfd_link_hash_new | |
868 | || h->root.type == bfd_link_hash_undefined | |
869 | || h->root.type == bfd_link_hash_undefweak | |
870 | || h->root.type == bfd_link_hash_common)) | |
871 | { | |
872 | elf_x86_hash_entry (h)->local_ref = 2; | |
873 | elf_x86_hash_entry (h)->linker_def = 1; | |
874 | } | |
0afcef53 L |
875 | } |
876 | } | |
877 | ||
878 | /* Invoke the regular ELF backend linker to do all the work. */ | |
879 | return _bfd_elf_link_check_relocs (abfd, info); | |
880 | } | |
881 | ||
5e2ac45d L |
882 | /* Set the sizes of the dynamic sections. */ |
883 | ||
884 | bfd_boolean | |
885 | _bfd_x86_elf_size_dynamic_sections (bfd *output_bfd, | |
886 | struct bfd_link_info *info) | |
887 | { | |
888 | struct elf_x86_link_hash_table *htab; | |
889 | bfd *dynobj; | |
890 | asection *s; | |
891 | bfd_boolean relocs; | |
892 | bfd *ibfd; | |
893 | const struct elf_backend_data *bed | |
894 | = get_elf_backend_data (output_bfd); | |
895 | ||
896 | htab = elf_x86_hash_table (info, bed->target_id); | |
897 | if (htab == NULL) | |
898 | return FALSE; | |
899 | dynobj = htab->elf.dynobj; | |
900 | if (dynobj == NULL) | |
901 | abort (); | |
902 | ||
903 | /* Set up .got offsets for local syms, and space for local dynamic | |
904 | relocs. */ | |
905 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
906 | { | |
907 | bfd_signed_vma *local_got; | |
908 | bfd_signed_vma *end_local_got; | |
909 | char *local_tls_type; | |
910 | bfd_vma *local_tlsdesc_gotent; | |
911 | bfd_size_type locsymcount; | |
912 | Elf_Internal_Shdr *symtab_hdr; | |
913 | asection *srel; | |
914 | ||
915 | if (! is_x86_elf (ibfd, htab)) | |
916 | continue; | |
917 | ||
918 | for (s = ibfd->sections; s != NULL; s = s->next) | |
919 | { | |
920 | struct elf_dyn_relocs *p; | |
921 | ||
5e2ac45d L |
922 | for (p = ((struct elf_dyn_relocs *) |
923 | elf_section_data (s)->local_dynrel); | |
924 | p != NULL; | |
925 | p = p->next) | |
926 | { | |
927 | if (!bfd_is_abs_section (p->sec) | |
928 | && bfd_is_abs_section (p->sec->output_section)) | |
929 | { | |
930 | /* Input section has been discarded, either because | |
931 | it is a copy of a linkonce section or due to | |
932 | linker script /DISCARD/, so we'll be discarding | |
933 | the relocs too. */ | |
934 | } | |
851b6fa1 | 935 | else if (htab->target_os == is_vxworks |
5e2ac45d L |
936 | && strcmp (p->sec->output_section->name, |
937 | ".tls_vars") == 0) | |
938 | { | |
939 | /* Relocations in vxworks .tls_vars sections are | |
940 | handled specially by the loader. */ | |
941 | } | |
942 | else if (p->count != 0) | |
943 | { | |
944 | srel = elf_section_data (p->sec)->sreloc; | |
945 | srel->size += p->count * htab->sizeof_reloc; | |
946 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 | |
947 | && (info->flags & DF_TEXTREL) == 0) | |
948 | { | |
949 | info->flags |= DF_TEXTREL; | |
950 | if ((info->warn_shared_textrel && bfd_link_pic (info)) | |
951 | || info->error_textrel) | |
952 | /* xgettext:c-format */ | |
826c3f1e AM |
953 | info->callbacks->einfo |
954 | (_("%P: %B: warning: relocation " | |
955 | "in read-only section `%A'\n"), | |
956 | p->sec->owner, p->sec); | |
5e2ac45d L |
957 | } |
958 | } | |
959 | } | |
960 | } | |
961 | ||
962 | local_got = elf_local_got_refcounts (ibfd); | |
963 | if (!local_got) | |
964 | continue; | |
965 | ||
966 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
967 | locsymcount = symtab_hdr->sh_info; | |
968 | end_local_got = local_got + locsymcount; | |
969 | local_tls_type = elf_x86_local_got_tls_type (ibfd); | |
970 | local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd); | |
971 | s = htab->elf.sgot; | |
972 | srel = htab->elf.srelgot; | |
973 | for (; local_got < end_local_got; | |
974 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
975 | { | |
976 | *local_tlsdesc_gotent = (bfd_vma) -1; | |
977 | if (*local_got > 0) | |
978 | { | |
979 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
980 | { | |
981 | *local_tlsdesc_gotent = htab->elf.sgotplt->size | |
982 | - elf_x86_compute_jump_table_size (htab); | |
983 | htab->elf.sgotplt->size += 2 * htab->got_entry_size; | |
984 | *local_got = (bfd_vma) -2; | |
985 | } | |
986 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
987 | || GOT_TLS_GD_P (*local_tls_type)) | |
988 | { | |
989 | *local_got = s->size; | |
990 | s->size += htab->got_entry_size; | |
991 | if (GOT_TLS_GD_P (*local_tls_type) | |
992 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
993 | s->size += htab->got_entry_size; | |
994 | } | |
995 | if (bfd_link_pic (info) | |
996 | || GOT_TLS_GD_ANY_P (*local_tls_type) | |
997 | || (*local_tls_type & GOT_TLS_IE)) | |
998 | { | |
999 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
1000 | srel->size += 2 * htab->sizeof_reloc; | |
1001 | else if (GOT_TLS_GD_P (*local_tls_type) | |
1002 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
1003 | srel->size += htab->sizeof_reloc; | |
1004 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
1005 | { | |
1006 | htab->elf.srelplt->size += htab->sizeof_reloc; | |
1007 | if (bed->target_id == X86_64_ELF_DATA) | |
1008 | htab->tlsdesc_plt = (bfd_vma) -1; | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | else | |
1013 | *local_got = (bfd_vma) -1; | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | if (htab->tls_ld_or_ldm_got.refcount > 0) | |
1018 | { | |
1019 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
07d6d2b8 | 1020 | or R_X86_64_TLSLD relocs. */ |
5e2ac45d L |
1021 | htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size; |
1022 | htab->elf.sgot->size += 2 * htab->got_entry_size; | |
1023 | htab->elf.srelgot->size += htab->sizeof_reloc; | |
1024 | } | |
1025 | else | |
1026 | htab->tls_ld_or_ldm_got.offset = -1; | |
1027 | ||
1028 | /* Allocate global sym .plt and .got entries, and space for global | |
1029 | sym dynamic relocs. */ | |
1030 | elf_link_hash_traverse (&htab->elf, elf_x86_allocate_dynrelocs, | |
1031 | info); | |
1032 | ||
1033 | /* Allocate .plt and .got entries, and space for local symbols. */ | |
1034 | htab_traverse (htab->loc_hash_table, elf_x86_allocate_local_dynreloc, | |
1035 | info); | |
1036 | ||
1037 | /* For every jump slot reserved in the sgotplt, reloc_count is | |
1038 | incremented. However, when we reserve space for TLS descriptors, | |
1039 | it's not incremented, so in order to compute the space reserved | |
1040 | for them, it suffices to multiply the reloc count by the jump | |
1041 | slot size. | |
1042 | ||
1043 | PR ld/13302: We start next_irelative_index at the end of .rela.plt | |
1044 | so that R_{386,X86_64}_IRELATIVE entries come last. */ | |
1045 | if (htab->elf.srelplt) | |
1046 | { | |
1047 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
1048 | htab->sgotplt_jump_table_size | |
1049 | = elf_x86_compute_jump_table_size (htab); | |
1050 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
1051 | } | |
1052 | else if (htab->elf.irelplt) | |
1053 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
1054 | ||
1055 | if (htab->tlsdesc_plt) | |
1056 | { | |
1057 | /* NB: tlsdesc_plt is set only for x86-64. If we're not using | |
1058 | lazy TLS relocations, don't generate the PLT and GOT entries | |
1059 | they require. */ | |
1060 | if ((info->flags & DF_BIND_NOW)) | |
1061 | htab->tlsdesc_plt = 0; | |
1062 | else | |
1063 | { | |
1064 | htab->tlsdesc_got = htab->elf.sgot->size; | |
1065 | htab->elf.sgot->size += htab->got_entry_size; | |
1066 | /* Reserve room for the initial entry. | |
1067 | FIXME: we could probably do away with it in this case. */ | |
1068 | if (htab->elf.splt->size == 0) | |
1069 | htab->elf.splt->size = htab->plt.plt_entry_size; | |
1070 | htab->tlsdesc_plt = htab->elf.splt->size; | |
1071 | htab->elf.splt->size += htab->plt.plt_entry_size; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | if (htab->elf.sgotplt) | |
1076 | { | |
1077 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
1078 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ | |
1079 | if ((htab->elf.hgot == NULL | |
1080 | || !htab->elf.hgot->ref_regular_nonweak) | |
1081 | && (htab->elf.sgotplt->size == bed->got_header_size) | |
1082 | && (htab->elf.splt == NULL | |
1083 | || htab->elf.splt->size == 0) | |
1084 | && (htab->elf.sgot == NULL | |
1085 | || htab->elf.sgot->size == 0) | |
1086 | && (htab->elf.iplt == NULL | |
1087 | || htab->elf.iplt->size == 0) | |
1088 | && (htab->elf.igotplt == NULL | |
1089 | || htab->elf.igotplt->size == 0)) | |
1090 | htab->elf.sgotplt->size = 0; | |
1091 | } | |
1092 | ||
1093 | if (_bfd_elf_eh_frame_present (info)) | |
1094 | { | |
1095 | if (htab->plt_eh_frame != NULL | |
1096 | && htab->elf.splt != NULL | |
1097 | && htab->elf.splt->size != 0 | |
1098 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
1099 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; | |
1100 | ||
1101 | if (htab->plt_got_eh_frame != NULL | |
1102 | && htab->plt_got != NULL | |
1103 | && htab->plt_got->size != 0 | |
1104 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
1105 | htab->plt_got_eh_frame->size | |
1106 | = htab->non_lazy_plt->eh_frame_plt_size; | |
1107 | ||
1108 | /* Unwind info for the second PLT and .plt.got sections are | |
1109 | identical. */ | |
1110 | if (htab->plt_second_eh_frame != NULL | |
1111 | && htab->plt_second != NULL | |
1112 | && htab->plt_second->size != 0 | |
1113 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
1114 | htab->plt_second_eh_frame->size | |
1115 | = htab->non_lazy_plt->eh_frame_plt_size; | |
1116 | } | |
1117 | ||
1118 | /* We now have determined the sizes of the various dynamic sections. | |
1119 | Allocate memory for them. */ | |
1120 | relocs = FALSE; | |
1121 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1122 | { | |
1123 | bfd_boolean strip_section = TRUE; | |
1124 | ||
1125 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1126 | continue; | |
1127 | ||
1128 | if (s == htab->elf.splt | |
1129 | || s == htab->elf.sgot) | |
1130 | { | |
1131 | /* Strip this section if we don't need it; see the | |
1132 | comment below. */ | |
1133 | /* We'd like to strip these sections if they aren't needed, but if | |
1134 | we've exported dynamic symbols from them we must leave them. | |
1135 | It's too late to tell BFD to get rid of the symbols. */ | |
1136 | ||
1137 | if (htab->elf.hplt != NULL) | |
1138 | strip_section = FALSE; | |
1139 | } | |
1140 | else if (s == htab->elf.sgotplt | |
1141 | || s == htab->elf.iplt | |
1142 | || s == htab->elf.igotplt | |
1143 | || s == htab->plt_second | |
1144 | || s == htab->plt_got | |
1145 | || s == htab->plt_eh_frame | |
1146 | || s == htab->plt_got_eh_frame | |
1147 | || s == htab->plt_second_eh_frame | |
1148 | || s == htab->elf.sdynbss | |
1149 | || s == htab->elf.sdynrelro) | |
1150 | { | |
1151 | /* Strip these too. */ | |
1152 | } | |
1153 | else if (htab->is_reloc_section (bfd_get_section_name (dynobj, s))) | |
1154 | { | |
1155 | if (s->size != 0 | |
1156 | && s != htab->elf.srelplt | |
1157 | && s != htab->srelplt2) | |
1158 | relocs = TRUE; | |
1159 | ||
1160 | /* We use the reloc_count field as a counter if we need | |
1161 | to copy relocs into the output file. */ | |
1162 | if (s != htab->elf.srelplt) | |
1163 | s->reloc_count = 0; | |
1164 | } | |
1165 | else | |
1166 | { | |
1167 | /* It's not one of our sections, so don't allocate space. */ | |
1168 | continue; | |
1169 | } | |
1170 | ||
1171 | if (s->size == 0) | |
1172 | { | |
1173 | /* If we don't need this section, strip it from the | |
1174 | output file. This is mostly to handle .rel.bss and | |
1175 | .rel.plt. We must create both sections in | |
1176 | create_dynamic_sections, because they must be created | |
1177 | before the linker maps input sections to output | |
1178 | sections. The linker does that before | |
1179 | adjust_dynamic_symbol is called, and it is that | |
1180 | function which decides whether anything needs to go | |
1181 | into these sections. */ | |
1182 | if (strip_section) | |
1183 | s->flags |= SEC_EXCLUDE; | |
1184 | continue; | |
1185 | } | |
1186 | ||
1187 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
1188 | continue; | |
1189 | ||
1190 | /* Allocate memory for the section contents. We use bfd_zalloc | |
1191 | here in case unused entries are not reclaimed before the | |
1192 | section's contents are written out. This should not happen, | |
1193 | but this way if it does, we get a R_386_NONE or R_X86_64_NONE | |
1194 | reloc instead of garbage. */ | |
1195 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); | |
1196 | if (s->contents == NULL) | |
1197 | return FALSE; | |
1198 | } | |
1199 | ||
1200 | if (htab->plt_eh_frame != NULL | |
1201 | && htab->plt_eh_frame->contents != NULL) | |
1202 | { | |
1203 | memcpy (htab->plt_eh_frame->contents, | |
1204 | htab->plt.eh_frame_plt, | |
1205 | htab->plt_eh_frame->size); | |
1206 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
1207 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
1208 | } | |
1209 | ||
1210 | if (htab->plt_got_eh_frame != NULL | |
1211 | && htab->plt_got_eh_frame->contents != NULL) | |
1212 | { | |
1213 | memcpy (htab->plt_got_eh_frame->contents, | |
1214 | htab->non_lazy_plt->eh_frame_plt, | |
1215 | htab->plt_got_eh_frame->size); | |
1216 | bfd_put_32 (dynobj, htab->plt_got->size, | |
1217 | (htab->plt_got_eh_frame->contents | |
1218 | + PLT_FDE_LEN_OFFSET)); | |
1219 | } | |
1220 | ||
1221 | if (htab->plt_second_eh_frame != NULL | |
1222 | && htab->plt_second_eh_frame->contents != NULL) | |
1223 | { | |
1224 | memcpy (htab->plt_second_eh_frame->contents, | |
1225 | htab->non_lazy_plt->eh_frame_plt, | |
1226 | htab->plt_second_eh_frame->size); | |
1227 | bfd_put_32 (dynobj, htab->plt_second->size, | |
1228 | (htab->plt_second_eh_frame->contents | |
1229 | + PLT_FDE_LEN_OFFSET)); | |
1230 | } | |
1231 | ||
1232 | if (htab->elf.dynamic_sections_created) | |
1233 | { | |
1234 | /* Add some entries to the .dynamic section. We fill in the | |
1235 | values later, in elf_{i386,x86_64}_finish_dynamic_sections, | |
1236 | but we must add the entries now so that we get the correct | |
1237 | size for the .dynamic section. The DT_DEBUG entry is filled | |
1238 | in by the dynamic linker and used by the debugger. */ | |
1239 | #define add_dynamic_entry(TAG, VAL) \ | |
1240 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
1241 | ||
1242 | if (bfd_link_executable (info)) | |
1243 | { | |
1244 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
1245 | return FALSE; | |
1246 | } | |
1247 | ||
1248 | if (htab->elf.splt->size != 0) | |
1249 | { | |
1250 | /* DT_PLTGOT is used by prelink even if there is no PLT | |
1251 | relocation. */ | |
1252 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
1253 | return FALSE; | |
1254 | } | |
1255 | ||
1256 | if (htab->elf.srelplt->size != 0) | |
1257 | { | |
1258 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
1259 | || !add_dynamic_entry (DT_PLTREL, htab->dt_reloc) | |
1260 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
1261 | return FALSE; | |
1262 | } | |
1263 | ||
1264 | if (htab->tlsdesc_plt | |
1265 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
1266 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
1267 | return FALSE; | |
1268 | ||
1269 | if (relocs) | |
1270 | { | |
1271 | if (!add_dynamic_entry (htab->dt_reloc, 0) | |
1272 | || !add_dynamic_entry (htab->dt_reloc_sz, 0) | |
1273 | || !add_dynamic_entry (htab->dt_reloc_ent, | |
1274 | htab->sizeof_reloc)) | |
1275 | return FALSE; | |
1276 | ||
1277 | /* If any dynamic relocs apply to a read-only section, | |
1278 | then we need a DT_TEXTREL entry. */ | |
1279 | if ((info->flags & DF_TEXTREL) == 0) | |
826c3f1e | 1280 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); |
5e2ac45d L |
1281 | |
1282 | if ((info->flags & DF_TEXTREL) != 0) | |
1283 | { | |
1284 | if (htab->readonly_dynrelocs_against_ifunc) | |
1285 | { | |
1286 | info->callbacks->einfo | |
826c3f1e AM |
1287 | (_("%P%X: read-only segment has dynamic IFUNC relocations;" |
1288 | " recompile with -fPIC\n")); | |
5e2ac45d L |
1289 | bfd_set_error (bfd_error_bad_value); |
1290 | return FALSE; | |
1291 | } | |
1292 | ||
1293 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
1294 | return FALSE; | |
1295 | } | |
1296 | } | |
851b6fa1 | 1297 | if (htab->target_os == is_vxworks |
5e2ac45d L |
1298 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
1299 | return FALSE; | |
1300 | } | |
1301 | #undef add_dynamic_entry | |
1302 | ||
1303 | return TRUE; | |
1304 | } | |
1305 | ||
9577f60b L |
1306 | /* Finish up the x86 dynamic sections. */ |
1307 | ||
1308 | struct elf_x86_link_hash_table * | |
1309 | _bfd_x86_elf_finish_dynamic_sections (bfd *output_bfd, | |
1310 | struct bfd_link_info *info) | |
1311 | { | |
1312 | struct elf_x86_link_hash_table *htab; | |
1313 | const struct elf_backend_data *bed; | |
1314 | bfd *dynobj; | |
1315 | asection *sdyn; | |
1316 | bfd_byte *dyncon, *dynconend; | |
1317 | bfd_size_type sizeof_dyn; | |
1318 | ||
1319 | bed = get_elf_backend_data (output_bfd); | |
1320 | htab = elf_x86_hash_table (info, bed->target_id); | |
1321 | if (htab == NULL) | |
1322 | return htab; | |
1323 | ||
1324 | dynobj = htab->elf.dynobj; | |
1325 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
1326 | ||
1327 | /* GOT is always created in setup_gnu_properties. But it may not be | |
1328 | needed. .got.plt section may be needed for static IFUNC. */ | |
1329 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
1330 | { | |
1331 | bfd_vma dynamic_addr; | |
1332 | ||
1333 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) | |
1334 | { | |
1335 | _bfd_error_handler | |
1336 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
1337 | return NULL; | |
1338 | } | |
1339 | ||
1340 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize | |
1341 | = htab->got_entry_size; | |
1342 | ||
1343 | dynamic_addr = (sdyn == NULL | |
1344 | ? (bfd_vma) 0 | |
1345 | : sdyn->output_section->vma + sdyn->output_offset); | |
1346 | ||
1347 | /* Set the first entry in the global offset table to the address | |
07d6d2b8 | 1348 | of the dynamic section. Write GOT[1] and GOT[2], needed for |
9577f60b L |
1349 | the dynamic linker. */ |
1350 | if (htab->got_entry_size == 8) | |
1351 | { | |
1352 | bfd_put_64 (output_bfd, dynamic_addr, | |
1353 | htab->elf.sgotplt->contents); | |
1354 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
1355 | htab->elf.sgotplt->contents + 8); | |
1356 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
1357 | htab->elf.sgotplt->contents + 8*2); | |
1358 | } | |
1359 | else | |
1360 | { | |
1361 | bfd_put_32 (output_bfd, dynamic_addr, | |
1362 | htab->elf.sgotplt->contents); | |
1363 | bfd_put_32 (output_bfd, 0, | |
1364 | htab->elf.sgotplt->contents + 4); | |
1365 | bfd_put_32 (output_bfd, 0, | |
1366 | htab->elf.sgotplt->contents + 4*2); | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | if (!htab->elf.dynamic_sections_created) | |
1371 | return htab; | |
1372 | ||
1373 | if (sdyn == NULL || htab->elf.sgot == NULL) | |
1374 | abort (); | |
1375 | ||
1376 | sizeof_dyn = bed->s->sizeof_dyn; | |
1377 | dyncon = sdyn->contents; | |
1378 | dynconend = sdyn->contents + sdyn->size; | |
1379 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
1380 | { | |
1381 | Elf_Internal_Dyn dyn; | |
1382 | asection *s; | |
1383 | ||
1384 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); | |
1385 | ||
1386 | switch (dyn.d_tag) | |
1387 | { | |
1388 | default: | |
851b6fa1 | 1389 | if (htab->target_os == is_vxworks |
9577f60b L |
1390 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
1391 | break; | |
1392 | continue; | |
1393 | ||
1394 | case DT_PLTGOT: | |
1395 | s = htab->elf.sgotplt; | |
1396 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
1397 | break; | |
1398 | ||
1399 | case DT_JMPREL: | |
1400 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; | |
1401 | break; | |
1402 | ||
1403 | case DT_PLTRELSZ: | |
1404 | s = htab->elf.srelplt->output_section; | |
1405 | dyn.d_un.d_val = s->size; | |
1406 | break; | |
1407 | ||
1408 | case DT_TLSDESC_PLT: | |
1409 | s = htab->elf.splt; | |
1410 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
1411 | + htab->tlsdesc_plt; | |
1412 | break; | |
1413 | ||
1414 | case DT_TLSDESC_GOT: | |
1415 | s = htab->elf.sgot; | |
1416 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
1417 | + htab->tlsdesc_got; | |
1418 | break; | |
1419 | } | |
1420 | ||
1421 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); | |
1422 | } | |
1423 | ||
1424 | if (htab->plt_got != NULL && htab->plt_got->size > 0) | |
1425 | elf_section_data (htab->plt_got->output_section) | |
1426 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
1427 | ||
1428 | if (htab->plt_second != NULL && htab->plt_second->size > 0) | |
1429 | elf_section_data (htab->plt_second->output_section) | |
1430 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
1431 | ||
1432 | /* Adjust .eh_frame for .plt section. */ | |
1433 | if (htab->plt_eh_frame != NULL | |
1434 | && htab->plt_eh_frame->contents != NULL) | |
1435 | { | |
1436 | if (htab->elf.splt != NULL | |
1437 | && htab->elf.splt->size != 0 | |
1438 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
1439 | && htab->elf.splt->output_section != NULL | |
1440 | && htab->plt_eh_frame->output_section != NULL) | |
1441 | { | |
1442 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
1443 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
1444 | + htab->plt_eh_frame->output_offset | |
1445 | + PLT_FDE_START_OFFSET; | |
1446 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
1447 | htab->plt_eh_frame->contents | |
1448 | + PLT_FDE_START_OFFSET); | |
1449 | } | |
1450 | ||
1451 | if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
1452 | { | |
1453 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
1454 | htab->plt_eh_frame, | |
1455 | htab->plt_eh_frame->contents)) | |
1456 | return NULL; | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | /* Adjust .eh_frame for .plt.got section. */ | |
1461 | if (htab->plt_got_eh_frame != NULL | |
1462 | && htab->plt_got_eh_frame->contents != NULL) | |
1463 | { | |
1464 | if (htab->plt_got != NULL | |
1465 | && htab->plt_got->size != 0 | |
1466 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
1467 | && htab->plt_got->output_section != NULL | |
1468 | && htab->plt_got_eh_frame->output_section != NULL) | |
1469 | { | |
1470 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
1471 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
1472 | + htab->plt_got_eh_frame->output_offset | |
1473 | + PLT_FDE_START_OFFSET; | |
1474 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
1475 | htab->plt_got_eh_frame->contents | |
1476 | + PLT_FDE_START_OFFSET); | |
1477 | } | |
1478 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
1479 | { | |
1480 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
1481 | htab->plt_got_eh_frame, | |
1482 | htab->plt_got_eh_frame->contents)) | |
1483 | return NULL; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | /* Adjust .eh_frame for the second PLT section. */ | |
1488 | if (htab->plt_second_eh_frame != NULL | |
1489 | && htab->plt_second_eh_frame->contents != NULL) | |
1490 | { | |
1491 | if (htab->plt_second != NULL | |
1492 | && htab->plt_second->size != 0 | |
1493 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
1494 | && htab->plt_second->output_section != NULL | |
1495 | && htab->plt_second_eh_frame->output_section != NULL) | |
1496 | { | |
1497 | bfd_vma plt_start = htab->plt_second->output_section->vma; | |
1498 | bfd_vma eh_frame_start | |
1499 | = (htab->plt_second_eh_frame->output_section->vma | |
1500 | + htab->plt_second_eh_frame->output_offset | |
1501 | + PLT_FDE_START_OFFSET); | |
1502 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
1503 | htab->plt_second_eh_frame->contents | |
1504 | + PLT_FDE_START_OFFSET); | |
1505 | } | |
1506 | if (htab->plt_second_eh_frame->sec_info_type | |
1507 | == SEC_INFO_TYPE_EH_FRAME) | |
1508 | { | |
1509 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
1510 | htab->plt_second_eh_frame, | |
1511 | htab->plt_second_eh_frame->contents)) | |
1512 | return NULL; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | if (htab->elf.sgot && htab->elf.sgot->size > 0) | |
1517 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
1518 | = htab->got_entry_size; | |
1519 | ||
1520 | return htab; | |
1521 | } | |
1522 | ||
1523 | ||
0afcef53 L |
1524 | bfd_boolean |
1525 | _bfd_x86_elf_always_size_sections (bfd *output_bfd, | |
1526 | struct bfd_link_info *info) | |
1527 | { | |
1528 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
1529 | ||
1530 | if (tls_sec) | |
1531 | { | |
1532 | struct elf_link_hash_entry *tlsbase; | |
1533 | ||
1534 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
1535 | "_TLS_MODULE_BASE_", | |
1536 | FALSE, FALSE, FALSE); | |
1537 | ||
1538 | if (tlsbase && tlsbase->type == STT_TLS) | |
1539 | { | |
1540 | struct elf_x86_link_hash_table *htab; | |
1541 | struct bfd_link_hash_entry *bh = NULL; | |
1542 | const struct elf_backend_data *bed | |
1543 | = get_elf_backend_data (output_bfd); | |
1544 | ||
1545 | htab = elf_x86_hash_table (info, bed->target_id); | |
1546 | if (htab == NULL) | |
1547 | return FALSE; | |
1548 | ||
1549 | if (!(_bfd_generic_link_add_one_symbol | |
1550 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
1551 | tls_sec, 0, NULL, FALSE, | |
1552 | bed->collect, &bh))) | |
1553 | return FALSE; | |
1554 | ||
1555 | htab->tls_module_base = bh; | |
1556 | ||
1557 | tlsbase = (struct elf_link_hash_entry *)bh; | |
1558 | tlsbase->def_regular = 1; | |
1559 | tlsbase->other = STV_HIDDEN; | |
1560 | tlsbase->root.linker_def = 1; | |
1561 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | return TRUE; | |
1566 | } | |
1567 | ||
1568 | void | |
1569 | _bfd_x86_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
1570 | const Elf_Internal_Sym *isym, | |
1571 | bfd_boolean definition, | |
1572 | bfd_boolean dynamic ATTRIBUTE_UNUSED) | |
1573 | { | |
1574 | if (definition) | |
1575 | { | |
1576 | struct elf_x86_link_hash_entry *eh | |
1577 | = (struct elf_x86_link_hash_entry *) h; | |
1578 | eh->def_protected = (ELF_ST_VISIBILITY (isym->st_other) | |
1579 | == STV_PROTECTED); | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1584 | ||
1585 | void | |
1586 | _bfd_x86_elf_copy_indirect_symbol (struct bfd_link_info *info, | |
1587 | struct elf_link_hash_entry *dir, | |
1588 | struct elf_link_hash_entry *ind) | |
1589 | { | |
1590 | struct elf_x86_link_hash_entry *edir, *eind; | |
1591 | ||
1592 | edir = (struct elf_x86_link_hash_entry *) dir; | |
1593 | eind = (struct elf_x86_link_hash_entry *) ind; | |
1594 | ||
1595 | if (eind->dyn_relocs != NULL) | |
1596 | { | |
1597 | if (edir->dyn_relocs != NULL) | |
1598 | { | |
1599 | struct elf_dyn_relocs **pp; | |
1600 | struct elf_dyn_relocs *p; | |
1601 | ||
1602 | /* Add reloc counts against the indirect sym to the direct sym | |
1603 | list. Merge any entries against the same section. */ | |
1604 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1605 | { | |
1606 | struct elf_dyn_relocs *q; | |
1607 | ||
1608 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1609 | if (q->sec == p->sec) | |
1610 | { | |
1611 | q->pc_count += p->pc_count; | |
1612 | q->count += p->count; | |
1613 | *pp = p->next; | |
1614 | break; | |
1615 | } | |
1616 | if (q == NULL) | |
1617 | pp = &p->next; | |
1618 | } | |
1619 | *pp = edir->dyn_relocs; | |
1620 | } | |
1621 | ||
1622 | edir->dyn_relocs = eind->dyn_relocs; | |
1623 | eind->dyn_relocs = NULL; | |
1624 | } | |
1625 | ||
1626 | if (ind->root.type == bfd_link_hash_indirect | |
1627 | && dir->got.refcount <= 0) | |
1628 | { | |
1629 | edir->tls_type = eind->tls_type; | |
1630 | eind->tls_type = GOT_UNKNOWN; | |
1631 | } | |
1632 | ||
1633 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will | |
1634 | generate a R_386_COPY reloc. */ | |
1635 | edir->gotoff_ref |= eind->gotoff_ref; | |
1636 | ||
98b273dc | 1637 | edir->zero_undefweak |= eind->zero_undefweak; |
0afcef53 L |
1638 | |
1639 | if (ELIMINATE_COPY_RELOCS | |
1640 | && ind->root.type != bfd_link_hash_indirect | |
1641 | && dir->dynamic_adjusted) | |
1642 | { | |
1643 | /* If called to transfer flags for a weakdef during processing | |
1644 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1645 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1646 | if (dir->versioned != versioned_hidden) | |
1647 | dir->ref_dynamic |= ind->ref_dynamic; | |
1648 | dir->ref_regular |= ind->ref_regular; | |
1649 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1650 | dir->needs_plt |= ind->needs_plt; | |
1651 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1652 | } | |
1653 | else | |
79b0c981 | 1654 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
0afcef53 L |
1655 | } |
1656 | ||
1657 | /* Remove undefined weak symbol from the dynamic symbol table if it | |
1658 | is resolved to 0. */ | |
1659 | ||
1660 | bfd_boolean | |
1661 | _bfd_x86_elf_fixup_symbol (struct bfd_link_info *info, | |
1662 | struct elf_link_hash_entry *h) | |
1663 | { | |
c5bce5c6 L |
1664 | if (h->dynindx != -1 |
1665 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, elf_x86_hash_entry (h))) | |
0afcef53 | 1666 | { |
c5bce5c6 L |
1667 | h->dynindx = -1; |
1668 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
1669 | h->dynstr_index); | |
0afcef53 L |
1670 | } |
1671 | return TRUE; | |
1672 | } | |
1673 | ||
1674 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
1675 | ||
1676 | bfd_boolean | |
1677 | _bfd_x86_elf_hash_symbol (struct elf_link_hash_entry *h) | |
1678 | { | |
1679 | if (h->plt.offset != (bfd_vma) -1 | |
1680 | && !h->def_regular | |
1681 | && !h->pointer_equality_needed) | |
1682 | return FALSE; | |
1683 | ||
1684 | return _bfd_elf_hash_symbol (h); | |
1685 | } | |
1686 | ||
eeb2f20a L |
1687 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1688 | regular object. The current definition is in some section of the | |
1689 | dynamic object, but we're not including those sections. We have to | |
1690 | change the definition to something the rest of the link can | |
1691 | understand. */ | |
1692 | ||
1693 | bfd_boolean | |
1694 | _bfd_x86_elf_adjust_dynamic_symbol (struct bfd_link_info *info, | |
1695 | struct elf_link_hash_entry *h) | |
1696 | { | |
1697 | struct elf_x86_link_hash_table *htab; | |
1698 | asection *s, *srel; | |
1699 | struct elf_x86_link_hash_entry *eh; | |
1700 | struct elf_dyn_relocs *p; | |
1701 | const struct elf_backend_data *bed | |
1702 | = get_elf_backend_data (info->output_bfd); | |
1703 | ||
1704 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
1705 | if (h->type == STT_GNU_IFUNC) | |
1706 | { | |
1707 | /* All local STT_GNU_IFUNC references must be treate as local | |
1708 | calls via local PLT. */ | |
1709 | if (h->ref_regular | |
1710 | && SYMBOL_CALLS_LOCAL (info, h)) | |
1711 | { | |
1712 | bfd_size_type pc_count = 0, count = 0; | |
1713 | struct elf_dyn_relocs **pp; | |
1714 | ||
1715 | eh = (struct elf_x86_link_hash_entry *) h; | |
1716 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1717 | { | |
1718 | pc_count += p->pc_count; | |
1719 | p->count -= p->pc_count; | |
1720 | p->pc_count = 0; | |
1721 | count += p->count; | |
1722 | if (p->count == 0) | |
1723 | *pp = p->next; | |
1724 | else | |
1725 | pp = &p->next; | |
1726 | } | |
1727 | ||
1728 | if (pc_count || count) | |
1729 | { | |
1730 | h->non_got_ref = 1; | |
1731 | if (pc_count) | |
1732 | { | |
1733 | /* Increment PLT reference count only for PC-relative | |
1734 | references. */ | |
1735 | h->needs_plt = 1; | |
1736 | if (h->plt.refcount <= 0) | |
1737 | h->plt.refcount = 1; | |
1738 | else | |
1739 | h->plt.refcount += 1; | |
1740 | } | |
1741 | } | |
1742 | } | |
1743 | ||
1744 | if (h->plt.refcount <= 0) | |
1745 | { | |
1746 | h->plt.offset = (bfd_vma) -1; | |
1747 | h->needs_plt = 0; | |
1748 | } | |
1749 | return TRUE; | |
1750 | } | |
1751 | ||
1752 | /* If this is a function, put it in the procedure linkage table. We | |
1753 | will fill in the contents of the procedure linkage table later, | |
1754 | when we know the address of the .got section. */ | |
1755 | if (h->type == STT_FUNC | |
1756 | || h->needs_plt) | |
1757 | { | |
1758 | if (h->plt.refcount <= 0 | |
1759 | || SYMBOL_CALLS_LOCAL (info, h) | |
1760 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1761 | && h->root.type == bfd_link_hash_undefweak)) | |
1762 | { | |
1763 | /* This case can occur if we saw a PLT32 reloc in an input | |
1764 | file, but the symbol was never referred to by a dynamic | |
1765 | object, or if all references were garbage collected. In | |
1766 | such a case, we don't actually need to build a procedure | |
1767 | linkage table, and we can just do a PC32 reloc instead. */ | |
1768 | h->plt.offset = (bfd_vma) -1; | |
1769 | h->needs_plt = 0; | |
1770 | } | |
1771 | ||
1772 | return TRUE; | |
1773 | } | |
1774 | else | |
1775 | /* It's possible that we incorrectly decided a .plt reloc was needed | |
1776 | * for an R_386_PC32/R_X86_64_PC32 reloc to a non-function sym in | |
1777 | check_relocs. We can't decide accurately between function and | |
1778 | non-function syms in check-relocs; Objects loaded later in | |
1779 | the link may change h->type. So fix it now. */ | |
1780 | h->plt.offset = (bfd_vma) -1; | |
1781 | ||
1782 | eh = (struct elf_x86_link_hash_entry *) h; | |
1783 | ||
1784 | /* If this is a weak symbol, and there is a real definition, the | |
1785 | processor independent code will have arranged for us to see the | |
1786 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 1787 | if (h->is_weakalias) |
eeb2f20a | 1788 | { |
60d67dc8 AM |
1789 | struct elf_link_hash_entry *def = weakdef (h); |
1790 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
1791 | h->root.u.def.section = def->root.u.def.section; | |
1792 | h->root.u.def.value = def->root.u.def.value; | |
eeb2f20a L |
1793 | if (ELIMINATE_COPY_RELOCS |
1794 | || info->nocopyreloc | |
1795 | || SYMBOL_NO_COPYRELOC (info, eh)) | |
1796 | { | |
1797 | /* NB: needs_copy is always 0 for i386. */ | |
60d67dc8 AM |
1798 | h->non_got_ref = def->non_got_ref; |
1799 | eh->needs_copy = def->needs_copy; | |
eeb2f20a L |
1800 | } |
1801 | return TRUE; | |
1802 | } | |
1803 | ||
1804 | /* This is a reference to a symbol defined by a dynamic object which | |
1805 | is not a function. */ | |
1806 | ||
1807 | /* If we are creating a shared library, we must presume that the | |
1808 | only references to the symbol are via the global offset table. | |
1809 | For such cases we need not do anything here; the relocations will | |
1810 | be handled correctly by relocate_section. */ | |
1811 | if (!bfd_link_executable (info)) | |
1812 | return TRUE; | |
1813 | ||
1814 | /* If there are no references to this symbol that do not use the | |
1815 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy | |
1816 | reloc. NB: gotoff_ref is always 0 for x86-64. */ | |
1817 | if (!h->non_got_ref && !eh->gotoff_ref) | |
1818 | return TRUE; | |
1819 | ||
1820 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
1821 | if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh)) | |
1822 | { | |
1823 | h->non_got_ref = 0; | |
1824 | return TRUE; | |
1825 | } | |
1826 | ||
1827 | htab = elf_x86_hash_table (info, bed->target_id); | |
1828 | if (htab == NULL) | |
1829 | return FALSE; | |
1830 | ||
1831 | /* If there aren't any dynamic relocs in read-only sections nor | |
1832 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
1833 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
1834 | not have dynamic relocations (other than copy and jump slot | |
1835 | relocations) in an executable. */ | |
1836 | if (ELIMINATE_COPY_RELOCS | |
1837 | && (bed->target_id == X86_64_ELF_DATA | |
1838 | || (!eh->gotoff_ref | |
851b6fa1 | 1839 | && htab->target_os != is_vxworks))) |
eeb2f20a | 1840 | { |
826c3f1e | 1841 | /* If we don't find any dynamic relocs in read-only sections, |
eeb2f20a L |
1842 | then we'll be keeping the dynamic relocs and avoiding the copy |
1843 | reloc. */ | |
826c3f1e | 1844 | if (!readonly_dynrelocs (h)) |
eeb2f20a L |
1845 | { |
1846 | h->non_got_ref = 0; | |
1847 | return TRUE; | |
1848 | } | |
1849 | } | |
1850 | ||
1851 | /* We must allocate the symbol in our .dynbss section, which will | |
1852 | become part of the .bss section of the executable. There will be | |
1853 | an entry for this symbol in the .dynsym section. The dynamic | |
1854 | object will contain position independent code, so all references | |
1855 | from the dynamic object to this symbol will go through the global | |
1856 | offset table. The dynamic linker will use the .dynsym entry to | |
1857 | determine the address it must put in the global offset table, so | |
1858 | both the dynamic object and the regular object will refer to the | |
1859 | same memory location for the variable. */ | |
1860 | ||
1861 | /* We must generate a R_386_COPY/R_X86_64_COPY reloc to tell the | |
1862 | dynamic linker to copy the initial value out of the dynamic object | |
1863 | and into the runtime process image. */ | |
1864 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) | |
1865 | { | |
1866 | s = htab->elf.sdynrelro; | |
1867 | srel = htab->elf.sreldynrelro; | |
1868 | } | |
1869 | else | |
1870 | { | |
1871 | s = htab->elf.sdynbss; | |
1872 | srel = htab->elf.srelbss; | |
1873 | } | |
1874 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) | |
1875 | { | |
503294e7 | 1876 | srel->size += htab->sizeof_reloc; |
eeb2f20a L |
1877 | h->needs_copy = 1; |
1878 | } | |
1879 | ||
1880 | return _bfd_elf_adjust_dynamic_copy (info, h, s); | |
1881 | } | |
1882 | ||
9f857535 L |
1883 | void |
1884 | _bfd_x86_elf_hide_symbol (struct bfd_link_info *info, | |
1885 | struct elf_link_hash_entry *h, | |
1886 | bfd_boolean force_local) | |
1887 | { | |
1888 | if (h->root.type == bfd_link_hash_undefweak | |
1889 | && info->nointerp | |
1890 | && bfd_link_pie (info)) | |
1891 | { | |
1892 | /* When there is no dynamic interpreter in PIE, make the undefined | |
1893 | weak symbol dynamic so that PC relative branch to the undefined | |
1894 | weak symbol will land to address 0. */ | |
1895 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); | |
79b0c981 | 1896 | if (h->plt.refcount > 0 |
9f857535 L |
1897 | || eh->plt_got.refcount > 0) |
1898 | return; | |
1899 | } | |
1900 | ||
1901 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); | |
1902 | } | |
1903 | ||
6999821f L |
1904 | /* Return TRUE if a symbol is referenced locally. It is similar to |
1905 | SYMBOL_REFERENCES_LOCAL, but it also checks version script. It | |
1906 | works in check_relocs. */ | |
1907 | ||
1908 | bfd_boolean | |
1909 | _bfd_x86_elf_link_symbol_references_local (struct bfd_link_info *info, | |
1910 | struct elf_link_hash_entry *h) | |
1911 | { | |
0a27fed7 L |
1912 | struct elf_x86_link_hash_entry *eh = elf_x86_hash_entry (h); |
1913 | struct elf_x86_link_hash_table *htab | |
1914 | = (struct elf_x86_link_hash_table *) info->hash; | |
6999821f L |
1915 | |
1916 | if (eh->local_ref > 1) | |
1917 | return TRUE; | |
1918 | ||
1919 | if (eh->local_ref == 1) | |
1920 | return FALSE; | |
1921 | ||
1922 | /* Unversioned symbols defined in regular objects can be forced local | |
0a27fed7 L |
1923 | by linker version script. A weak undefined symbol is forced local |
1924 | if | |
1925 | 1. It has non-default visibility. Or | |
8fbf0ba1 | 1926 | 2. When building executable, there is no dynamic linker. Or |
0a27fed7 L |
1927 | 3. or "-z nodynamic-undefined-weak" is used. |
1928 | */ | |
6999821f | 1929 | if (SYMBOL_REFERENCES_LOCAL (info, h) |
0a27fed7 L |
1930 | || (h->root.type == bfd_link_hash_undefweak |
1931 | && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1932 | || (bfd_link_executable (info) | |
8fbf0ba1 | 1933 | && htab->interp == NULL) |
0a27fed7 | 1934 | || info->dynamic_undefined_weak == 0)) |
6999821f L |
1935 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
1936 | && h->versioned == unversioned | |
1937 | && info->version_info != NULL | |
1938 | && bfd_hide_sym_by_version (info->version_info, | |
1939 | h->root.root.string))) | |
1940 | { | |
1941 | eh->local_ref = 2; | |
1942 | return TRUE; | |
1943 | } | |
1944 | ||
1945 | eh->local_ref = 1; | |
1946 | return FALSE; | |
1947 | } | |
1948 | ||
4f501a24 L |
1949 | /* Return the section that should be marked against GC for a given |
1950 | relocation. */ | |
1951 | ||
1952 | asection * | |
1953 | _bfd_x86_elf_gc_mark_hook (asection *sec, | |
1954 | struct bfd_link_info *info, | |
1955 | Elf_Internal_Rela *rel, | |
1956 | struct elf_link_hash_entry *h, | |
1957 | Elf_Internal_Sym *sym) | |
1958 | { | |
1959 | /* Compiler should optimize this out. */ | |
1960 | if (((unsigned int) R_X86_64_GNU_VTINHERIT | |
1961 | != (unsigned int) R_386_GNU_VTINHERIT) | |
1962 | || ((unsigned int) R_X86_64_GNU_VTENTRY | |
1963 | != (unsigned int) R_386_GNU_VTENTRY)) | |
1964 | abort (); | |
1965 | ||
1966 | if (h != NULL) | |
1967 | switch (ELF32_R_TYPE (rel->r_info)) | |
1968 | { | |
1969 | case R_X86_64_GNU_VTINHERIT: | |
1970 | case R_X86_64_GNU_VTENTRY: | |
1971 | return NULL; | |
1972 | } | |
1973 | ||
1974 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
1975 | } | |
1976 | ||
f493882d L |
1977 | static bfd_vma |
1978 | elf_i386_get_plt_got_vma (struct elf_x86_plt *plt_p ATTRIBUTE_UNUSED, | |
1979 | bfd_vma off, | |
1980 | bfd_vma offset ATTRIBUTE_UNUSED, | |
1981 | bfd_vma got_addr) | |
1982 | { | |
1983 | return got_addr + off; | |
1984 | } | |
1985 | ||
1986 | static bfd_vma | |
1987 | elf_x86_64_get_plt_got_vma (struct elf_x86_plt *plt_p, | |
1988 | bfd_vma off, | |
1989 | bfd_vma offset, | |
1990 | bfd_vma got_addr ATTRIBUTE_UNUSED) | |
1991 | { | |
1992 | return plt_p->sec->vma + offset + off + plt_p->plt_got_insn_size; | |
1993 | } | |
1994 | ||
1995 | static bfd_boolean | |
1996 | elf_i386_valid_plt_reloc_p (unsigned int type) | |
1997 | { | |
1998 | return (type == R_386_JUMP_SLOT | |
1999 | || type == R_386_GLOB_DAT | |
2000 | || type == R_386_IRELATIVE); | |
2001 | } | |
2002 | ||
2003 | static bfd_boolean | |
2004 | elf_x86_64_valid_plt_reloc_p (unsigned int type) | |
2005 | { | |
2006 | return (type == R_X86_64_JUMP_SLOT | |
2007 | || type == R_X86_64_GLOB_DAT | |
2008 | || type == R_X86_64_IRELATIVE); | |
2009 | } | |
2010 | ||
2011 | long | |
2012 | _bfd_x86_elf_get_synthetic_symtab (bfd *abfd, | |
2013 | long count, | |
2014 | long relsize, | |
2015 | bfd_vma got_addr, | |
2016 | struct elf_x86_plt plts[], | |
2017 | asymbol **dynsyms, | |
2018 | asymbol **ret) | |
2019 | { | |
2020 | long size, i, n, len; | |
2021 | int j; | |
2022 | unsigned int plt_got_offset, plt_entry_size; | |
2023 | asymbol *s; | |
2024 | bfd_byte *plt_contents; | |
2025 | long dynrelcount; | |
2026 | arelent **dynrelbuf, *p; | |
2027 | char *names; | |
2028 | const struct elf_backend_data *bed; | |
2029 | bfd_vma (*get_plt_got_vma) (struct elf_x86_plt *, bfd_vma, bfd_vma, | |
2030 | bfd_vma); | |
2031 | bfd_boolean (*valid_plt_reloc_p) (unsigned int); | |
2032 | ||
2033 | if (count == 0) | |
2034 | return -1; | |
2035 | ||
2036 | dynrelbuf = (arelent **) bfd_malloc (relsize); | |
2037 | if (dynrelbuf == NULL) | |
2038 | return -1; | |
2039 | ||
2040 | dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, | |
2041 | dynsyms); | |
b69e9267 | 2042 | if (dynrelcount <= 0) |
94670f6c | 2043 | return -1; |
f493882d L |
2044 | |
2045 | /* Sort the relocs by address. */ | |
2046 | qsort (dynrelbuf, dynrelcount, sizeof (arelent *), | |
2047 | _bfd_x86_elf_compare_relocs); | |
2048 | ||
2049 | size = count * sizeof (asymbol); | |
2050 | ||
2051 | /* Allocate space for @plt suffixes. */ | |
2052 | n = 0; | |
2053 | for (i = 0; i < dynrelcount; i++) | |
2054 | { | |
2055 | p = dynrelbuf[i]; | |
2056 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
2057 | if (p->addend != 0) | |
2058 | size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd); | |
2059 | } | |
2060 | ||
2061 | s = *ret = (asymbol *) bfd_zmalloc (size); | |
2062 | if (s == NULL) | |
2063 | goto bad_return; | |
2064 | ||
2065 | bed = get_elf_backend_data (abfd); | |
2066 | ||
2067 | if (bed->target_id == X86_64_ELF_DATA) | |
2068 | { | |
2069 | get_plt_got_vma = elf_x86_64_get_plt_got_vma; | |
2070 | valid_plt_reloc_p = elf_x86_64_valid_plt_reloc_p; | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | get_plt_got_vma = elf_i386_get_plt_got_vma; | |
2075 | valid_plt_reloc_p = elf_i386_valid_plt_reloc_p; | |
2076 | if (got_addr) | |
2077 | { | |
2078 | /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_ | |
2079 | address. */ | |
2080 | asection *sec = bfd_get_section_by_name (abfd, ".got.plt"); | |
2081 | if (sec != NULL) | |
2082 | got_addr = sec->vma; | |
2083 | else | |
2084 | { | |
2085 | sec = bfd_get_section_by_name (abfd, ".got"); | |
2086 | if (sec != NULL) | |
2087 | got_addr = sec->vma; | |
2088 | } | |
2089 | ||
2090 | if (got_addr == (bfd_vma) -1) | |
2091 | goto bad_return; | |
2092 | } | |
2093 | } | |
2094 | ||
2095 | /* Check for each PLT section. */ | |
2096 | names = (char *) (s + count); | |
2097 | size = 0; | |
2098 | n = 0; | |
2099 | for (j = 0; plts[j].name != NULL; j++) | |
2100 | if ((plt_contents = plts[j].contents) != NULL) | |
2101 | { | |
2102 | long k; | |
2103 | bfd_vma offset; | |
2104 | asection *plt; | |
2105 | struct elf_x86_plt *plt_p = &plts[j]; | |
2106 | ||
2107 | plt_got_offset = plt_p->plt_got_offset; | |
2108 | plt_entry_size = plt_p->plt_entry_size; | |
2109 | ||
2110 | plt = plt_p->sec; | |
2111 | ||
2112 | if ((plt_p->type & plt_lazy)) | |
2113 | { | |
2114 | /* Skip PLT0 in lazy PLT. */ | |
2115 | k = 1; | |
2116 | offset = plt_entry_size; | |
2117 | } | |
2118 | else | |
2119 | { | |
2120 | k = 0; | |
2121 | offset = 0; | |
2122 | } | |
2123 | ||
2124 | /* Check each PLT entry against dynamic relocations. */ | |
2125 | for (; k < plt_p->count; k++) | |
2126 | { | |
2127 | int off; | |
2128 | bfd_vma got_vma; | |
2129 | long min, max, mid; | |
2130 | ||
2131 | /* Get the GOT offset for i386 or the PC-relative offset | |
2132 | for x86-64, a signed 32-bit integer. */ | |
2133 | off = H_GET_32 (abfd, (plt_contents + offset | |
2134 | + plt_got_offset)); | |
2135 | got_vma = get_plt_got_vma (plt_p, off, offset, got_addr); | |
2136 | ||
2137 | /* Binary search. */ | |
2138 | p = dynrelbuf[0]; | |
2139 | min = 0; | |
2140 | max = dynrelcount; | |
2141 | while ((min + 1) < max) | |
2142 | { | |
2143 | arelent *r; | |
2144 | ||
2145 | mid = (min + max) / 2; | |
2146 | r = dynrelbuf[mid]; | |
2147 | if (got_vma > r->address) | |
2148 | min = mid; | |
2149 | else if (got_vma < r->address) | |
2150 | max = mid; | |
2151 | else | |
2152 | { | |
2153 | p = r; | |
2154 | break; | |
2155 | } | |
2156 | } | |
2157 | ||
2158 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ | |
2159 | if (got_vma == p->address | |
2160 | && p->howto != NULL | |
2161 | && valid_plt_reloc_p (p->howto->type)) | |
2162 | { | |
2163 | *s = **p->sym_ptr_ptr; | |
2164 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL | |
2165 | set. Since we are defining a symbol, ensure one | |
2166 | of them is set. */ | |
2167 | if ((s->flags & BSF_LOCAL) == 0) | |
2168 | s->flags |= BSF_GLOBAL; | |
2169 | s->flags |= BSF_SYNTHETIC; | |
2170 | /* This is no longer a section symbol. */ | |
2171 | s->flags &= ~BSF_SECTION_SYM; | |
2172 | s->section = plt; | |
2173 | s->the_bfd = plt->owner; | |
2174 | s->value = offset; | |
2175 | s->udata.p = NULL; | |
2176 | s->name = names; | |
2177 | len = strlen ((*p->sym_ptr_ptr)->name); | |
2178 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
2179 | names += len; | |
2180 | if (p->addend != 0) | |
2181 | { | |
2182 | char buf[30], *a; | |
2183 | ||
2184 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
2185 | names += sizeof ("+0x") - 1; | |
2186 | bfd_sprintf_vma (abfd, buf, p->addend); | |
2187 | for (a = buf; *a == '0'; ++a) | |
2188 | ; | |
2189 | size = strlen (a); | |
2190 | memcpy (names, a, size); | |
2191 | names += size; | |
2192 | } | |
2193 | memcpy (names, "@plt", sizeof ("@plt")); | |
2194 | names += sizeof ("@plt"); | |
2195 | n++; | |
2196 | s++; | |
61e3bf5f L |
2197 | /* There should be only one entry in PLT for a given |
2198 | symbol. Set howto to NULL after processing a PLT | |
2199 | entry to guard against corrupted PLT. */ | |
2200 | p->howto = NULL; | |
f493882d L |
2201 | } |
2202 | offset += plt_entry_size; | |
2203 | } | |
2204 | } | |
2205 | ||
2206 | /* PLT entries with R_386_TLS_DESC relocations are skipped. */ | |
2207 | if (n == 0) | |
2208 | { | |
2209 | bad_return: | |
2210 | count = -1; | |
2211 | } | |
2212 | else | |
2213 | count = n; | |
2214 | ||
2215 | for (j = 0; plts[j].name != NULL; j++) | |
2216 | if (plts[j].contents != NULL) | |
2217 | free (plts[j].contents); | |
2218 | ||
2219 | free (dynrelbuf); | |
2220 | ||
2221 | return count; | |
2222 | } | |
2223 | ||
0afcef53 L |
2224 | /* Parse x86 GNU properties. */ |
2225 | ||
2226 | enum elf_property_kind | |
2227 | _bfd_x86_elf_parse_gnu_properties (bfd *abfd, unsigned int type, | |
2228 | bfd_byte *ptr, unsigned int datasz) | |
2229 | { | |
2230 | elf_property *prop; | |
2231 | ||
2232 | switch (type) | |
2233 | { | |
2234 | case GNU_PROPERTY_X86_ISA_1_USED: | |
2235 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
2236 | case GNU_PROPERTY_X86_FEATURE_1_AND: | |
2237 | if (datasz != 4) | |
2238 | { | |
2239 | _bfd_error_handler | |
2240 | ((type == GNU_PROPERTY_X86_ISA_1_USED | |
2241 | ? _("error: %B: <corrupt x86 ISA used size: 0x%x>") | |
2242 | : (type == GNU_PROPERTY_X86_ISA_1_NEEDED | |
2243 | ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>") | |
2244 | : _("error: %B: <corrupt x86 feature size: 0x%x>"))), | |
2245 | abfd, datasz); | |
2246 | return property_corrupt; | |
2247 | } | |
2248 | prop = _bfd_elf_get_property (abfd, type, datasz); | |
2249 | /* Combine properties of the same type. */ | |
2250 | prop->u.number |= bfd_h_get_32 (abfd, ptr); | |
2251 | prop->pr_kind = property_number; | |
2252 | break; | |
2253 | ||
2254 | default: | |
2255 | return property_ignored; | |
2256 | } | |
2257 | ||
2258 | return property_number; | |
2259 | } | |
2260 | ||
2261 | /* Merge x86 GNU property BPROP with APROP. If APROP isn't NULL, | |
2262 | return TRUE if APROP is updated. Otherwise, return TRUE if BPROP | |
2263 | should be merged with ABFD. */ | |
2264 | ||
2265 | bfd_boolean | |
2266 | _bfd_x86_elf_merge_gnu_properties (struct bfd_link_info *info, | |
2267 | bfd *abfd ATTRIBUTE_UNUSED, | |
2268 | elf_property *aprop, | |
2269 | elf_property *bprop) | |
2270 | { | |
2271 | unsigned int number, features; | |
2272 | bfd_boolean updated = FALSE; | |
2273 | unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type; | |
2274 | ||
2275 | switch (pr_type) | |
2276 | { | |
2277 | case GNU_PROPERTY_X86_ISA_1_USED: | |
2278 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
2279 | if (aprop != NULL && bprop != NULL) | |
2280 | { | |
2281 | number = aprop->u.number; | |
2282 | aprop->u.number = number | bprop->u.number; | |
2283 | updated = number != (unsigned int) aprop->u.number; | |
2284 | } | |
2285 | else | |
2286 | { | |
2287 | /* Return TRUE if APROP is NULL to indicate that BPROP should | |
2288 | be added to ABFD. */ | |
2289 | updated = aprop == NULL; | |
2290 | } | |
2291 | break; | |
2292 | ||
2293 | case GNU_PROPERTY_X86_FEATURE_1_AND: | |
2294 | /* Only one of APROP and BPROP can be NULL: | |
2295 | 1. APROP & BPROP when both APROP and BPROP aren't NULL. | |
2296 | 2. If APROP is NULL, remove x86 feature. | |
2297 | 3. Otherwise, do nothing. | |
2298 | */ | |
2299 | if (aprop != NULL && bprop != NULL) | |
2300 | { | |
2301 | features = 0; | |
2302 | if (info->ibt) | |
2303 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
2304 | if (info->shstk) | |
2305 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
2306 | number = aprop->u.number; | |
2307 | /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and | |
2308 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
2309 | aprop->u.number = (number & bprop->u.number) | features; | |
2310 | updated = number != (unsigned int) aprop->u.number; | |
2311 | /* Remove the property if all feature bits are cleared. */ | |
2312 | if (aprop->u.number == 0) | |
2313 | aprop->pr_kind = property_remove; | |
2314 | } | |
2315 | else | |
2316 | { | |
2317 | features = 0; | |
2318 | if (info->ibt) | |
2319 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
2320 | if (info->shstk) | |
2321 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
2322 | if (features) | |
2323 | { | |
2324 | /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and | |
2325 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
2326 | if (aprop != NULL) | |
2327 | { | |
2328 | number = aprop->u.number; | |
2329 | aprop->u.number = number | features; | |
2330 | updated = number != (unsigned int) aprop->u.number; | |
2331 | } | |
2332 | else | |
2333 | { | |
2334 | bprop->u.number |= features; | |
2335 | updated = TRUE; | |
2336 | } | |
2337 | } | |
2338 | else if (aprop != NULL) | |
2339 | { | |
2340 | aprop->pr_kind = property_remove; | |
2341 | updated = TRUE; | |
2342 | } | |
2343 | } | |
2344 | break; | |
2345 | ||
2346 | default: | |
2347 | /* Never should happen. */ | |
2348 | abort (); | |
2349 | } | |
2350 | ||
2351 | return updated; | |
2352 | } | |
a6798bab L |
2353 | |
2354 | /* Set up x86 GNU properties. Return the first relocatable ELF input | |
2355 | with GNU properties if found. Otherwise, return NULL. */ | |
2356 | ||
2357 | bfd * | |
2358 | _bfd_x86_elf_link_setup_gnu_properties | |
1de031c8 | 2359 | (struct bfd_link_info *info, struct elf_x86_init_table *init_table) |
a6798bab L |
2360 | { |
2361 | bfd_boolean normal_target; | |
2362 | bfd_boolean lazy_plt; | |
2363 | asection *sec, *pltsec; | |
2364 | bfd *dynobj; | |
2365 | bfd_boolean use_ibt_plt; | |
2366 | unsigned int plt_alignment, features; | |
2367 | struct elf_x86_link_hash_table *htab; | |
2368 | bfd *pbfd; | |
2369 | bfd *ebfd = NULL; | |
2370 | elf_property *prop; | |
2371 | const struct elf_backend_data *bed; | |
2372 | unsigned int class_align = ABI_64_P (info->output_bfd) ? 3 : 2; | |
2373 | unsigned int got_align; | |
2374 | ||
2375 | features = 0; | |
2376 | if (info->ibt) | |
2377 | features = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
2378 | if (info->shstk) | |
2379 | features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
2380 | ||
2381 | /* Find a normal input file with GNU property note. */ | |
2382 | for (pbfd = info->input_bfds; | |
2383 | pbfd != NULL; | |
2384 | pbfd = pbfd->link.next) | |
2385 | if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour | |
2386 | && bfd_count_sections (pbfd) != 0) | |
2387 | { | |
2388 | ebfd = pbfd; | |
2389 | ||
2390 | if (elf_properties (pbfd) != NULL) | |
2391 | break; | |
2392 | } | |
2393 | ||
2394 | if (ebfd != NULL && features) | |
2395 | { | |
2396 | /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and | |
2397 | GNU_PROPERTY_X86_FEATURE_1_SHSTK. */ | |
2398 | prop = _bfd_elf_get_property (ebfd, | |
2399 | GNU_PROPERTY_X86_FEATURE_1_AND, | |
2400 | 4); | |
2401 | prop->u.number |= features; | |
2402 | prop->pr_kind = property_number; | |
2403 | ||
2404 | /* Create the GNU property note section if needed. */ | |
2405 | if (pbfd == NULL) | |
2406 | { | |
2407 | sec = bfd_make_section_with_flags (ebfd, | |
2408 | NOTE_GNU_PROPERTY_SECTION_NAME, | |
2409 | (SEC_ALLOC | |
2410 | | SEC_LOAD | |
2411 | | SEC_IN_MEMORY | |
2412 | | SEC_READONLY | |
2413 | | SEC_HAS_CONTENTS | |
2414 | | SEC_DATA)); | |
2415 | if (sec == NULL) | |
2c244f9b | 2416 | info->callbacks->einfo (_("%F%P: failed to create GNU property section\n")); |
a6798bab L |
2417 | |
2418 | if (!bfd_set_section_alignment (ebfd, sec, class_align)) | |
2419 | { | |
2420 | error_alignment: | |
2421 | info->callbacks->einfo (_("%F%A: failed to align section\n"), | |
2422 | sec); | |
2423 | } | |
2424 | ||
2425 | elf_section_type (sec) = SHT_NOTE; | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | pbfd = _bfd_elf_link_setup_gnu_properties (info); | |
2430 | ||
a6798bab L |
2431 | bed = get_elf_backend_data (info->output_bfd); |
2432 | ||
2433 | htab = elf_x86_hash_table (info, bed->target_id); | |
2434 | if (htab == NULL) | |
2435 | return pbfd; | |
2436 | ||
1de031c8 L |
2437 | htab->r_info = init_table->r_info; |
2438 | htab->r_sym = init_table->r_sym; | |
7a382c1c L |
2439 | |
2440 | if (bfd_link_relocatable (info)) | |
2441 | return pbfd; | |
eeb2f20a | 2442 | |
851b6fa1 L |
2443 | htab->plt0_pad_byte = init_table->plt0_pad_byte; |
2444 | ||
a6798bab L |
2445 | use_ibt_plt = info->ibtplt || info->ibt; |
2446 | if (!use_ibt_plt && pbfd != NULL) | |
2447 | { | |
2448 | /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */ | |
2449 | elf_property_list *p; | |
2450 | ||
2451 | /* The property list is sorted in order of type. */ | |
2452 | for (p = elf_properties (pbfd); p; p = p->next) | |
2453 | { | |
2454 | if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type) | |
2455 | { | |
2456 | use_ibt_plt = !!(p->property.u.number | |
2457 | & GNU_PROPERTY_X86_FEATURE_1_IBT); | |
2458 | break; | |
2459 | } | |
2460 | else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type) | |
2461 | break; | |
2462 | } | |
2463 | } | |
2464 | ||
2465 | dynobj = htab->elf.dynobj; | |
2466 | ||
2467 | /* Set htab->elf.dynobj here so that there is no need to check and | |
2468 | set it in check_relocs. */ | |
2469 | if (dynobj == NULL) | |
2470 | { | |
2471 | if (pbfd != NULL) | |
2472 | { | |
2473 | htab->elf.dynobj = pbfd; | |
2474 | dynobj = pbfd; | |
2475 | } | |
2476 | else | |
2477 | { | |
2478 | bfd *abfd; | |
2479 | ||
2480 | /* Find a normal input file to hold linker created | |
2481 | sections. */ | |
2482 | for (abfd = info->input_bfds; | |
2483 | abfd != NULL; | |
2484 | abfd = abfd->link.next) | |
2485 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
2486 | && (abfd->flags | |
2487 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
2488 | { | |
2489 | htab->elf.dynobj = abfd; | |
2490 | dynobj = abfd; | |
2491 | break; | |
2492 | } | |
2493 | } | |
2494 | } | |
2495 | ||
851b6fa1 L |
2496 | /* Return if there are no normal input files. */ |
2497 | if (dynobj == NULL) | |
2498 | return pbfd; | |
2499 | ||
a6798bab L |
2500 | /* Even when lazy binding is disabled by "-z now", the PLT0 entry may |
2501 | still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for | |
2502 | canonical function address. */ | |
2503 | htab->plt.has_plt0 = 1; | |
851b6fa1 | 2504 | normal_target = htab->target_os == is_normal; |
a6798bab L |
2505 | |
2506 | if (normal_target) | |
2507 | { | |
2508 | if (use_ibt_plt) | |
2509 | { | |
1de031c8 L |
2510 | htab->lazy_plt = init_table->lazy_ibt_plt; |
2511 | htab->non_lazy_plt = init_table->non_lazy_ibt_plt; | |
a6798bab L |
2512 | } |
2513 | else | |
2514 | { | |
1de031c8 L |
2515 | htab->lazy_plt = init_table->lazy_plt; |
2516 | htab->non_lazy_plt = init_table->non_lazy_plt; | |
a6798bab L |
2517 | } |
2518 | } | |
2519 | else | |
2520 | { | |
1de031c8 | 2521 | htab->lazy_plt = init_table->lazy_plt; |
a6798bab L |
2522 | htab->non_lazy_plt = NULL; |
2523 | } | |
2524 | ||
2525 | pltsec = htab->elf.splt; | |
2526 | ||
2527 | /* If the non-lazy PLT is available, use it for all PLT entries if | |
2528 | there are no PLT0 or no .plt section. */ | |
2529 | if (htab->non_lazy_plt != NULL | |
2530 | && (!htab->plt.has_plt0 || pltsec == NULL)) | |
2531 | { | |
2532 | lazy_plt = FALSE; | |
2533 | if (bfd_link_pic (info)) | |
2534 | htab->plt.plt_entry = htab->non_lazy_plt->pic_plt_entry; | |
2535 | else | |
2536 | htab->plt.plt_entry = htab->non_lazy_plt->plt_entry; | |
2537 | htab->plt.plt_entry_size = htab->non_lazy_plt->plt_entry_size; | |
2538 | htab->plt.plt_got_offset = htab->non_lazy_plt->plt_got_offset; | |
2539 | htab->plt.plt_got_insn_size | |
2540 | = htab->non_lazy_plt->plt_got_insn_size; | |
2541 | htab->plt.eh_frame_plt_size | |
2542 | = htab->non_lazy_plt->eh_frame_plt_size; | |
2543 | htab->plt.eh_frame_plt = htab->non_lazy_plt->eh_frame_plt; | |
2544 | } | |
2545 | else | |
2546 | { | |
2547 | lazy_plt = TRUE; | |
2548 | if (bfd_link_pic (info)) | |
2549 | { | |
2550 | htab->plt.plt0_entry = htab->lazy_plt->pic_plt0_entry; | |
2551 | htab->plt.plt_entry = htab->lazy_plt->pic_plt_entry; | |
2552 | } | |
2553 | else | |
2554 | { | |
2555 | htab->plt.plt0_entry = htab->lazy_plt->plt0_entry; | |
2556 | htab->plt.plt_entry = htab->lazy_plt->plt_entry; | |
2557 | } | |
2558 | htab->plt.plt_entry_size = htab->lazy_plt->plt_entry_size; | |
2559 | htab->plt.plt_got_offset = htab->lazy_plt->plt_got_offset; | |
2560 | htab->plt.plt_got_insn_size | |
2561 | = htab->lazy_plt->plt_got_insn_size; | |
2562 | htab->plt.eh_frame_plt_size | |
2563 | = htab->lazy_plt->eh_frame_plt_size; | |
2564 | htab->plt.eh_frame_plt = htab->lazy_plt->eh_frame_plt; | |
2565 | } | |
2566 | ||
851b6fa1 | 2567 | if (htab->target_os == is_vxworks |
a6798bab L |
2568 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
2569 | &htab->srelplt2)) | |
2570 | { | |
2c244f9b | 2571 | info->callbacks->einfo (_("%F%P: failed to create VxWorks dynamic sections\n")); |
a6798bab L |
2572 | return pbfd; |
2573 | } | |
2574 | ||
2575 | /* Since create_dynamic_sections isn't always called, but GOT | |
2576 | relocations need GOT relocations, create them here so that we | |
2577 | don't need to do it in check_relocs. */ | |
2578 | if (htab->elf.sgot == NULL | |
2579 | && !_bfd_elf_create_got_section (dynobj, info)) | |
2c244f9b | 2580 | info->callbacks->einfo (_("%F%P: failed to create GOT sections\n")); |
a6798bab L |
2581 | |
2582 | got_align = (bed->target_id == X86_64_ELF_DATA) ? 3 : 2; | |
2583 | ||
2584 | /* Align .got and .got.plt sections to their entry size. Do it here | |
2585 | instead of in create_dynamic_sections so that they are always | |
2586 | properly aligned even if create_dynamic_sections isn't called. */ | |
2587 | sec = htab->elf.sgot; | |
2588 | if (!bfd_set_section_alignment (dynobj, sec, got_align)) | |
2589 | goto error_alignment; | |
2590 | ||
2591 | sec = htab->elf.sgotplt; | |
2592 | if (!bfd_set_section_alignment (dynobj, sec, got_align)) | |
2593 | goto error_alignment; | |
2594 | ||
2595 | /* Create the ifunc sections here so that check_relocs can be | |
2596 | simplified. */ | |
2597 | if (!_bfd_elf_create_ifunc_sections (dynobj, info)) | |
2c244f9b | 2598 | info->callbacks->einfo (_("%F%P: failed to create ifunc sections\n")); |
a6798bab L |
2599 | |
2600 | plt_alignment = bfd_log2 (htab->plt.plt_entry_size); | |
2601 | ||
2602 | if (pltsec != NULL) | |
2603 | { | |
2604 | /* Whe creating executable, set the contents of the .interp | |
2605 | section to the interpreter. */ | |
2606 | if (bfd_link_executable (info) && !info->nointerp) | |
2607 | { | |
2608 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
2609 | if (s == NULL) | |
2610 | abort (); | |
2611 | s->size = htab->dynamic_interpreter_size; | |
2612 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
2613 | htab->interp = s; | |
2614 | } | |
2615 | ||
2616 | /* Don't change PLT section alignment for NaCl since it uses | |
2617 | 64-byte PLT entry and sets PLT section alignment to 32 | |
2618 | bytes. Don't create additional PLT sections for NaCl. */ | |
2619 | if (normal_target) | |
2620 | { | |
2621 | flagword pltflags = (bed->dynamic_sec_flags | |
2622 | | SEC_ALLOC | |
2623 | | SEC_CODE | |
2624 | | SEC_LOAD | |
2625 | | SEC_READONLY); | |
2626 | unsigned int non_lazy_plt_alignment | |
2627 | = bfd_log2 (htab->non_lazy_plt->plt_entry_size); | |
2628 | ||
2629 | sec = pltsec; | |
2630 | if (!bfd_set_section_alignment (sec->owner, sec, | |
2631 | plt_alignment)) | |
2632 | goto error_alignment; | |
2633 | ||
2634 | /* Create the GOT procedure linkage table. */ | |
2635 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
2636 | ".plt.got", | |
2637 | pltflags); | |
2638 | if (sec == NULL) | |
2c244f9b | 2639 | info->callbacks->einfo (_("%F%P: failed to create GOT PLT section\n")); |
a6798bab L |
2640 | |
2641 | if (!bfd_set_section_alignment (dynobj, sec, | |
2642 | non_lazy_plt_alignment)) | |
2643 | goto error_alignment; | |
2644 | ||
2645 | htab->plt_got = sec; | |
2646 | ||
2647 | if (lazy_plt) | |
2648 | { | |
2649 | sec = NULL; | |
2650 | ||
2651 | if (use_ibt_plt) | |
2652 | { | |
2653 | /* Create the second PLT for Intel IBT support. IBT | |
2654 | PLT is supported only for non-NaCl target and is | |
2655 | is needed only for lazy binding. */ | |
2656 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
2657 | ".plt.sec", | |
2658 | pltflags); | |
2659 | if (sec == NULL) | |
2c244f9b | 2660 | info->callbacks->einfo (_("%F%P: failed to create IBT-enabled PLT section\n")); |
a6798bab L |
2661 | |
2662 | if (!bfd_set_section_alignment (dynobj, sec, | |
2663 | plt_alignment)) | |
2664 | goto error_alignment; | |
2665 | } | |
2666 | else if (info->bndplt && ABI_64_P (dynobj)) | |
2667 | { | |
2668 | /* Create the second PLT for Intel MPX support. MPX | |
2669 | PLT is supported only for non-NaCl target in 64-bit | |
2670 | mode and is needed only for lazy binding. */ | |
2671 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
2672 | ".plt.sec", | |
2673 | pltflags); | |
2674 | if (sec == NULL) | |
2c244f9b | 2675 | info->callbacks->einfo (_("%F%P: failed to create BND PLT section\n")); |
a6798bab L |
2676 | |
2677 | if (!bfd_set_section_alignment (dynobj, sec, | |
2678 | non_lazy_plt_alignment)) | |
2679 | goto error_alignment; | |
2680 | } | |
2681 | ||
2682 | htab->plt_second = sec; | |
2683 | } | |
2684 | } | |
2685 | ||
2686 | if (!info->no_ld_generated_unwind_info) | |
2687 | { | |
2688 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
2689 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
2690 | | SEC_LINKER_CREATED); | |
2691 | ||
2692 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
2693 | ".eh_frame", | |
2694 | flags); | |
2695 | if (sec == NULL) | |
2c244f9b | 2696 | info->callbacks->einfo (_("%F%P: failed to create PLT .eh_frame section\n")); |
a6798bab L |
2697 | |
2698 | if (!bfd_set_section_alignment (dynobj, sec, class_align)) | |
2699 | goto error_alignment; | |
2700 | ||
2701 | htab->plt_eh_frame = sec; | |
2702 | ||
2703 | if (htab->plt_got != NULL) | |
2704 | { | |
2705 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
2706 | ".eh_frame", | |
2707 | flags); | |
2708 | if (sec == NULL) | |
2c244f9b | 2709 | info->callbacks->einfo (_("%F%P: failed to create GOT PLT .eh_frame section\n")); |
a6798bab L |
2710 | |
2711 | if (!bfd_set_section_alignment (dynobj, sec, class_align)) | |
2712 | goto error_alignment; | |
2713 | ||
2714 | htab->plt_got_eh_frame = sec; | |
2715 | } | |
2716 | ||
2717 | if (htab->plt_second != NULL) | |
2718 | { | |
2719 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
2720 | ".eh_frame", | |
2721 | flags); | |
2722 | if (sec == NULL) | |
2c244f9b | 2723 | info->callbacks->einfo (_("%F%P: failed to create the second PLT .eh_frame section\n")); |
a6798bab L |
2724 | |
2725 | if (!bfd_set_section_alignment (dynobj, sec, class_align)) | |
2726 | goto error_alignment; | |
2727 | ||
2728 | htab->plt_second_eh_frame = sec; | |
2729 | } | |
2730 | } | |
2731 | } | |
2732 | ||
2733 | if (normal_target) | |
2734 | { | |
2735 | /* The .iplt section is used for IFUNC symbols in static | |
2736 | executables. */ | |
2737 | sec = htab->elf.iplt; | |
2738 | if (sec != NULL | |
2739 | && !bfd_set_section_alignment (sec->owner, sec, | |
2740 | plt_alignment)) | |
2741 | goto error_alignment; | |
2742 | } | |
2743 | ||
2744 | return pbfd; | |
2745 | } |