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1 | /* ELF executable support for BFD. | |
2 | ||
3 | Copyright (C) 1993-2021 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
22 | ||
23 | /* | |
24 | SECTION | |
25 | ELF backends | |
26 | ||
27 | BFD support for ELF formats is being worked on. | |
28 | Currently, the best supported back ends are for sparc and i386 | |
29 | (running svr4 or Solaris 2). | |
30 | ||
31 | Documentation of the internals of the support code still needs | |
32 | to be written. The code is changing quickly enough that we | |
33 | haven't bothered yet. */ | |
34 | ||
35 | /* For sparc64-cross-sparc32. */ | |
36 | #define _SYSCALL32 | |
37 | #include "sysdep.h" | |
38 | #include <limits.h> | |
39 | #include "bfd.h" | |
40 | #include "bfdlink.h" | |
41 | #include "libbfd.h" | |
42 | #define ARCH_SIZE 0 | |
43 | #include "elf-bfd.h" | |
44 | #include "libiberty.h" | |
45 | #include "safe-ctype.h" | |
46 | #include "elf-linux-core.h" | |
47 | ||
48 | #ifdef CORE_HEADER | |
49 | #include CORE_HEADER | |
50 | #endif | |
51 | ||
52 | static int elf_sort_sections (const void *, const void *); | |
53 | static bool assign_file_positions_except_relocs (bfd *, struct bfd_link_info *); | |
54 | static bool swap_out_syms (bfd *, struct elf_strtab_hash **, int, | |
55 | struct bfd_link_info *); | |
56 | static bool elf_parse_notes (bfd *abfd, char *buf, size_t size, | |
57 | file_ptr offset, size_t align); | |
58 | ||
59 | /* Swap version information in and out. The version information is | |
60 | currently size independent. If that ever changes, this code will | |
61 | need to move into elfcode.h. */ | |
62 | ||
63 | /* Swap in a Verdef structure. */ | |
64 | ||
65 | void | |
66 | _bfd_elf_swap_verdef_in (bfd *abfd, | |
67 | const Elf_External_Verdef *src, | |
68 | Elf_Internal_Verdef *dst) | |
69 | { | |
70 | dst->vd_version = H_GET_16 (abfd, src->vd_version); | |
71 | dst->vd_flags = H_GET_16 (abfd, src->vd_flags); | |
72 | dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx); | |
73 | dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt); | |
74 | dst->vd_hash = H_GET_32 (abfd, src->vd_hash); | |
75 | dst->vd_aux = H_GET_32 (abfd, src->vd_aux); | |
76 | dst->vd_next = H_GET_32 (abfd, src->vd_next); | |
77 | } | |
78 | ||
79 | /* Swap out a Verdef structure. */ | |
80 | ||
81 | void | |
82 | _bfd_elf_swap_verdef_out (bfd *abfd, | |
83 | const Elf_Internal_Verdef *src, | |
84 | Elf_External_Verdef *dst) | |
85 | { | |
86 | H_PUT_16 (abfd, src->vd_version, dst->vd_version); | |
87 | H_PUT_16 (abfd, src->vd_flags, dst->vd_flags); | |
88 | H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx); | |
89 | H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt); | |
90 | H_PUT_32 (abfd, src->vd_hash, dst->vd_hash); | |
91 | H_PUT_32 (abfd, src->vd_aux, dst->vd_aux); | |
92 | H_PUT_32 (abfd, src->vd_next, dst->vd_next); | |
93 | } | |
94 | ||
95 | /* Swap in a Verdaux structure. */ | |
96 | ||
97 | void | |
98 | _bfd_elf_swap_verdaux_in (bfd *abfd, | |
99 | const Elf_External_Verdaux *src, | |
100 | Elf_Internal_Verdaux *dst) | |
101 | { | |
102 | dst->vda_name = H_GET_32 (abfd, src->vda_name); | |
103 | dst->vda_next = H_GET_32 (abfd, src->vda_next); | |
104 | } | |
105 | ||
106 | /* Swap out a Verdaux structure. */ | |
107 | ||
108 | void | |
109 | _bfd_elf_swap_verdaux_out (bfd *abfd, | |
110 | const Elf_Internal_Verdaux *src, | |
111 | Elf_External_Verdaux *dst) | |
112 | { | |
113 | H_PUT_32 (abfd, src->vda_name, dst->vda_name); | |
114 | H_PUT_32 (abfd, src->vda_next, dst->vda_next); | |
115 | } | |
116 | ||
117 | /* Swap in a Verneed structure. */ | |
118 | ||
119 | void | |
120 | _bfd_elf_swap_verneed_in (bfd *abfd, | |
121 | const Elf_External_Verneed *src, | |
122 | Elf_Internal_Verneed *dst) | |
123 | { | |
124 | dst->vn_version = H_GET_16 (abfd, src->vn_version); | |
125 | dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt); | |
126 | dst->vn_file = H_GET_32 (abfd, src->vn_file); | |
127 | dst->vn_aux = H_GET_32 (abfd, src->vn_aux); | |
128 | dst->vn_next = H_GET_32 (abfd, src->vn_next); | |
129 | } | |
130 | ||
131 | /* Swap out a Verneed structure. */ | |
132 | ||
133 | void | |
134 | _bfd_elf_swap_verneed_out (bfd *abfd, | |
135 | const Elf_Internal_Verneed *src, | |
136 | Elf_External_Verneed *dst) | |
137 | { | |
138 | H_PUT_16 (abfd, src->vn_version, dst->vn_version); | |
139 | H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt); | |
140 | H_PUT_32 (abfd, src->vn_file, dst->vn_file); | |
141 | H_PUT_32 (abfd, src->vn_aux, dst->vn_aux); | |
142 | H_PUT_32 (abfd, src->vn_next, dst->vn_next); | |
143 | } | |
144 | ||
145 | /* Swap in a Vernaux structure. */ | |
146 | ||
147 | void | |
148 | _bfd_elf_swap_vernaux_in (bfd *abfd, | |
149 | const Elf_External_Vernaux *src, | |
150 | Elf_Internal_Vernaux *dst) | |
151 | { | |
152 | dst->vna_hash = H_GET_32 (abfd, src->vna_hash); | |
153 | dst->vna_flags = H_GET_16 (abfd, src->vna_flags); | |
154 | dst->vna_other = H_GET_16 (abfd, src->vna_other); | |
155 | dst->vna_name = H_GET_32 (abfd, src->vna_name); | |
156 | dst->vna_next = H_GET_32 (abfd, src->vna_next); | |
157 | } | |
158 | ||
159 | /* Swap out a Vernaux structure. */ | |
160 | ||
161 | void | |
162 | _bfd_elf_swap_vernaux_out (bfd *abfd, | |
163 | const Elf_Internal_Vernaux *src, | |
164 | Elf_External_Vernaux *dst) | |
165 | { | |
166 | H_PUT_32 (abfd, src->vna_hash, dst->vna_hash); | |
167 | H_PUT_16 (abfd, src->vna_flags, dst->vna_flags); | |
168 | H_PUT_16 (abfd, src->vna_other, dst->vna_other); | |
169 | H_PUT_32 (abfd, src->vna_name, dst->vna_name); | |
170 | H_PUT_32 (abfd, src->vna_next, dst->vna_next); | |
171 | } | |
172 | ||
173 | /* Swap in a Versym structure. */ | |
174 | ||
175 | void | |
176 | _bfd_elf_swap_versym_in (bfd *abfd, | |
177 | const Elf_External_Versym *src, | |
178 | Elf_Internal_Versym *dst) | |
179 | { | |
180 | dst->vs_vers = H_GET_16 (abfd, src->vs_vers); | |
181 | } | |
182 | ||
183 | /* Swap out a Versym structure. */ | |
184 | ||
185 | void | |
186 | _bfd_elf_swap_versym_out (bfd *abfd, | |
187 | const Elf_Internal_Versym *src, | |
188 | Elf_External_Versym *dst) | |
189 | { | |
190 | H_PUT_16 (abfd, src->vs_vers, dst->vs_vers); | |
191 | } | |
192 | ||
193 | /* Standard ELF hash function. Do not change this function; you will | |
194 | cause invalid hash tables to be generated. */ | |
195 | ||
196 | unsigned long | |
197 | bfd_elf_hash (const char *namearg) | |
198 | { | |
199 | const unsigned char *name = (const unsigned char *) namearg; | |
200 | unsigned long h = 0; | |
201 | unsigned long g; | |
202 | int ch; | |
203 | ||
204 | while ((ch = *name++) != '\0') | |
205 | { | |
206 | h = (h << 4) + ch; | |
207 | if ((g = (h & 0xf0000000)) != 0) | |
208 | { | |
209 | h ^= g >> 24; | |
210 | /* The ELF ABI says `h &= ~g', but this is equivalent in | |
211 | this case and on some machines one insn instead of two. */ | |
212 | h ^= g; | |
213 | } | |
214 | } | |
215 | return h & 0xffffffff; | |
216 | } | |
217 | ||
218 | /* DT_GNU_HASH hash function. Do not change this function; you will | |
219 | cause invalid hash tables to be generated. */ | |
220 | ||
221 | unsigned long | |
222 | bfd_elf_gnu_hash (const char *namearg) | |
223 | { | |
224 | const unsigned char *name = (const unsigned char *) namearg; | |
225 | unsigned long h = 5381; | |
226 | unsigned char ch; | |
227 | ||
228 | while ((ch = *name++) != '\0') | |
229 | h = (h << 5) + h + ch; | |
230 | return h & 0xffffffff; | |
231 | } | |
232 | ||
233 | /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with | |
234 | the object_id field of an elf_obj_tdata field set to OBJECT_ID. */ | |
235 | bool | |
236 | bfd_elf_allocate_object (bfd *abfd, | |
237 | size_t object_size, | |
238 | enum elf_target_id object_id) | |
239 | { | |
240 | BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata)); | |
241 | abfd->tdata.any = bfd_zalloc (abfd, object_size); | |
242 | if (abfd->tdata.any == NULL) | |
243 | return false; | |
244 | ||
245 | elf_object_id (abfd) = object_id; | |
246 | if (abfd->direction != read_direction) | |
247 | { | |
248 | struct output_elf_obj_tdata *o = bfd_zalloc (abfd, sizeof *o); | |
249 | if (o == NULL) | |
250 | return false; | |
251 | elf_tdata (abfd)->o = o; | |
252 | elf_program_header_size (abfd) = (bfd_size_type) -1; | |
253 | } | |
254 | return true; | |
255 | } | |
256 | ||
257 | ||
258 | bool | |
259 | bfd_elf_make_object (bfd *abfd) | |
260 | { | |
261 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
262 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata), | |
263 | bed->target_id); | |
264 | } | |
265 | ||
266 | bool | |
267 | bfd_elf_mkcorefile (bfd *abfd) | |
268 | { | |
269 | /* I think this can be done just like an object file. */ | |
270 | if (!abfd->xvec->_bfd_set_format[(int) bfd_object] (abfd)) | |
271 | return false; | |
272 | elf_tdata (abfd)->core = bfd_zalloc (abfd, sizeof (*elf_tdata (abfd)->core)); | |
273 | return elf_tdata (abfd)->core != NULL; | |
274 | } | |
275 | ||
276 | char * | |
277 | bfd_elf_get_str_section (bfd *abfd, unsigned int shindex) | |
278 | { | |
279 | Elf_Internal_Shdr **i_shdrp; | |
280 | bfd_byte *shstrtab = NULL; | |
281 | file_ptr offset; | |
282 | bfd_size_type shstrtabsize; | |
283 | ||
284 | i_shdrp = elf_elfsections (abfd); | |
285 | if (i_shdrp == 0 | |
286 | || shindex >= elf_numsections (abfd) | |
287 | || i_shdrp[shindex] == 0) | |
288 | return NULL; | |
289 | ||
290 | shstrtab = i_shdrp[shindex]->contents; | |
291 | if (shstrtab == NULL) | |
292 | { | |
293 | /* No cached one, attempt to read, and cache what we read. */ | |
294 | offset = i_shdrp[shindex]->sh_offset; | |
295 | shstrtabsize = i_shdrp[shindex]->sh_size; | |
296 | ||
297 | /* Allocate and clear an extra byte at the end, to prevent crashes | |
298 | in case the string table is not terminated. */ | |
299 | if (shstrtabsize + 1 <= 1 | |
300 | || bfd_seek (abfd, offset, SEEK_SET) != 0 | |
301 | || (shstrtab = _bfd_alloc_and_read (abfd, shstrtabsize + 1, | |
302 | shstrtabsize)) == NULL) | |
303 | { | |
304 | /* Once we've failed to read it, make sure we don't keep | |
305 | trying. Otherwise, we'll keep allocating space for | |
306 | the string table over and over. */ | |
307 | i_shdrp[shindex]->sh_size = 0; | |
308 | } | |
309 | else | |
310 | shstrtab[shstrtabsize] = '\0'; | |
311 | i_shdrp[shindex]->contents = shstrtab; | |
312 | } | |
313 | return (char *) shstrtab; | |
314 | } | |
315 | ||
316 | char * | |
317 | bfd_elf_string_from_elf_section (bfd *abfd, | |
318 | unsigned int shindex, | |
319 | unsigned int strindex) | |
320 | { | |
321 | Elf_Internal_Shdr *hdr; | |
322 | ||
323 | if (strindex == 0) | |
324 | return ""; | |
325 | ||
326 | if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd)) | |
327 | return NULL; | |
328 | ||
329 | hdr = elf_elfsections (abfd)[shindex]; | |
330 | ||
331 | if (hdr->contents == NULL) | |
332 | { | |
333 | if (hdr->sh_type != SHT_STRTAB && hdr->sh_type < SHT_LOOS) | |
334 | { | |
335 | /* PR 17512: file: f057ec89. */ | |
336 | /* xgettext:c-format */ | |
337 | _bfd_error_handler (_("%pB: attempt to load strings from" | |
338 | " a non-string section (number %d)"), | |
339 | abfd, shindex); | |
340 | return NULL; | |
341 | } | |
342 | ||
343 | if (bfd_elf_get_str_section (abfd, shindex) == NULL) | |
344 | return NULL; | |
345 | } | |
346 | else | |
347 | { | |
348 | /* PR 24273: The string section's contents may have already | |
349 | been loaded elsewhere, eg because a corrupt file has the | |
350 | string section index in the ELF header pointing at a group | |
351 | section. So be paranoid, and test that the last byte of | |
352 | the section is zero. */ | |
353 | if (hdr->sh_size == 0 || hdr->contents[hdr->sh_size - 1] != 0) | |
354 | return NULL; | |
355 | } | |
356 | ||
357 | if (strindex >= hdr->sh_size) | |
358 | { | |
359 | unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx; | |
360 | _bfd_error_handler | |
361 | /* xgettext:c-format */ | |
362 | (_("%pB: invalid string offset %u >= %" PRIu64 " for section `%s'"), | |
363 | abfd, strindex, (uint64_t) hdr->sh_size, | |
364 | (shindex == shstrndx && strindex == hdr->sh_name | |
365 | ? ".shstrtab" | |
366 | : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name))); | |
367 | return NULL; | |
368 | } | |
369 | ||
370 | return ((char *) hdr->contents) + strindex; | |
371 | } | |
372 | ||
373 | /* Read and convert symbols to internal format. | |
374 | SYMCOUNT specifies the number of symbols to read, starting from | |
375 | symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF | |
376 | are non-NULL, they are used to store the internal symbols, external | |
377 | symbols, and symbol section index extensions, respectively. | |
378 | Returns a pointer to the internal symbol buffer (malloced if necessary) | |
379 | or NULL if there were no symbols or some kind of problem. */ | |
380 | ||
381 | Elf_Internal_Sym * | |
382 | bfd_elf_get_elf_syms (bfd *ibfd, | |
383 | Elf_Internal_Shdr *symtab_hdr, | |
384 | size_t symcount, | |
385 | size_t symoffset, | |
386 | Elf_Internal_Sym *intsym_buf, | |
387 | void *extsym_buf, | |
388 | Elf_External_Sym_Shndx *extshndx_buf) | |
389 | { | |
390 | Elf_Internal_Shdr *shndx_hdr; | |
391 | void *alloc_ext; | |
392 | const bfd_byte *esym; | |
393 | Elf_External_Sym_Shndx *alloc_extshndx; | |
394 | Elf_External_Sym_Shndx *shndx; | |
395 | Elf_Internal_Sym *alloc_intsym; | |
396 | Elf_Internal_Sym *isym; | |
397 | Elf_Internal_Sym *isymend; | |
398 | const struct elf_backend_data *bed; | |
399 | size_t extsym_size; | |
400 | size_t amt; | |
401 | file_ptr pos; | |
402 | ||
403 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
404 | abort (); | |
405 | ||
406 | if (symcount == 0) | |
407 | return intsym_buf; | |
408 | ||
409 | /* Normal syms might have section extension entries. */ | |
410 | shndx_hdr = NULL; | |
411 | if (elf_symtab_shndx_list (ibfd) != NULL) | |
412 | { | |
413 | elf_section_list * entry; | |
414 | Elf_Internal_Shdr **sections = elf_elfsections (ibfd); | |
415 | ||
416 | /* Find an index section that is linked to this symtab section. */ | |
417 | for (entry = elf_symtab_shndx_list (ibfd); entry != NULL; entry = entry->next) | |
418 | { | |
419 | /* PR 20063. */ | |
420 | if (entry->hdr.sh_link >= elf_numsections (ibfd)) | |
421 | continue; | |
422 | ||
423 | if (sections[entry->hdr.sh_link] == symtab_hdr) | |
424 | { | |
425 | shndx_hdr = & entry->hdr; | |
426 | break; | |
427 | }; | |
428 | } | |
429 | ||
430 | if (shndx_hdr == NULL) | |
431 | { | |
432 | if (symtab_hdr == & elf_symtab_hdr (ibfd)) | |
433 | /* Not really accurate, but this was how the old code used to work. */ | |
434 | shndx_hdr = & elf_symtab_shndx_list (ibfd)->hdr; | |
435 | /* Otherwise we do nothing. The assumption is that | |
436 | the index table will not be needed. */ | |
437 | } | |
438 | } | |
439 | ||
440 | /* Read the symbols. */ | |
441 | alloc_ext = NULL; | |
442 | alloc_extshndx = NULL; | |
443 | alloc_intsym = NULL; | |
444 | bed = get_elf_backend_data (ibfd); | |
445 | extsym_size = bed->s->sizeof_sym; | |
446 | if (_bfd_mul_overflow (symcount, extsym_size, &amt)) | |
447 | { | |
448 | bfd_set_error (bfd_error_file_too_big); | |
449 | intsym_buf = NULL; | |
450 | goto out; | |
451 | } | |
452 | pos = symtab_hdr->sh_offset + symoffset * extsym_size; | |
453 | if (extsym_buf == NULL) | |
454 | { | |
455 | alloc_ext = bfd_malloc (amt); | |
456 | extsym_buf = alloc_ext; | |
457 | } | |
458 | if (extsym_buf == NULL | |
459 | || bfd_seek (ibfd, pos, SEEK_SET) != 0 | |
460 | || bfd_bread (extsym_buf, amt, ibfd) != amt) | |
461 | { | |
462 | intsym_buf = NULL; | |
463 | goto out; | |
464 | } | |
465 | ||
466 | if (shndx_hdr == NULL || shndx_hdr->sh_size == 0) | |
467 | extshndx_buf = NULL; | |
468 | else | |
469 | { | |
470 | if (_bfd_mul_overflow (symcount, sizeof (Elf_External_Sym_Shndx), &amt)) | |
471 | { | |
472 | bfd_set_error (bfd_error_file_too_big); | |
473 | intsym_buf = NULL; | |
474 | goto out; | |
475 | } | |
476 | pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx); | |
477 | if (extshndx_buf == NULL) | |
478 | { | |
479 | alloc_extshndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
480 | extshndx_buf = alloc_extshndx; | |
481 | } | |
482 | if (extshndx_buf == NULL | |
483 | || bfd_seek (ibfd, pos, SEEK_SET) != 0 | |
484 | || bfd_bread (extshndx_buf, amt, ibfd) != amt) | |
485 | { | |
486 | intsym_buf = NULL; | |
487 | goto out; | |
488 | } | |
489 | } | |
490 | ||
491 | if (intsym_buf == NULL) | |
492 | { | |
493 | if (_bfd_mul_overflow (symcount, sizeof (Elf_Internal_Sym), &amt)) | |
494 | { | |
495 | bfd_set_error (bfd_error_file_too_big); | |
496 | goto out; | |
497 | } | |
498 | alloc_intsym = (Elf_Internal_Sym *) bfd_malloc (amt); | |
499 | intsym_buf = alloc_intsym; | |
500 | if (intsym_buf == NULL) | |
501 | goto out; | |
502 | } | |
503 | ||
504 | /* Convert the symbols to internal form. */ | |
505 | isymend = intsym_buf + symcount; | |
506 | for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf, | |
507 | shndx = extshndx_buf; | |
508 | isym < isymend; | |
509 | esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL) | |
510 | if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym)) | |
511 | { | |
512 | symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size; | |
513 | /* xgettext:c-format */ | |
514 | _bfd_error_handler (_("%pB symbol number %lu references" | |
515 | " nonexistent SHT_SYMTAB_SHNDX section"), | |
516 | ibfd, (unsigned long) symoffset); | |
517 | free (alloc_intsym); | |
518 | intsym_buf = NULL; | |
519 | goto out; | |
520 | } | |
521 | ||
522 | out: | |
523 | free (alloc_ext); | |
524 | free (alloc_extshndx); | |
525 | ||
526 | return intsym_buf; | |
527 | } | |
528 | ||
529 | /* Look up a symbol name. */ | |
530 | const char * | |
531 | bfd_elf_sym_name (bfd *abfd, | |
532 | Elf_Internal_Shdr *symtab_hdr, | |
533 | Elf_Internal_Sym *isym, | |
534 | asection *sym_sec) | |
535 | { | |
536 | const char *name; | |
537 | unsigned int iname = isym->st_name; | |
538 | unsigned int shindex = symtab_hdr->sh_link; | |
539 | ||
540 | if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION | |
541 | /* Check for a bogus st_shndx to avoid crashing. */ | |
542 | && isym->st_shndx < elf_numsections (abfd)) | |
543 | { | |
544 | iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name; | |
545 | shindex = elf_elfheader (abfd)->e_shstrndx; | |
546 | } | |
547 | ||
548 | name = bfd_elf_string_from_elf_section (abfd, shindex, iname); | |
549 | if (name == NULL) | |
550 | name = "(null)"; | |
551 | else if (sym_sec && *name == '\0') | |
552 | name = bfd_section_name (sym_sec); | |
553 | ||
554 | return name; | |
555 | } | |
556 | ||
557 | /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP | |
558 | sections. The first element is the flags, the rest are section | |
559 | pointers. */ | |
560 | ||
561 | typedef union elf_internal_group { | |
562 | Elf_Internal_Shdr *shdr; | |
563 | unsigned int flags; | |
564 | } Elf_Internal_Group; | |
565 | ||
566 | /* Return the name of the group signature symbol. Why isn't the | |
567 | signature just a string? */ | |
568 | ||
569 | static const char * | |
570 | group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr) | |
571 | { | |
572 | Elf_Internal_Shdr *hdr; | |
573 | unsigned char esym[sizeof (Elf64_External_Sym)]; | |
574 | Elf_External_Sym_Shndx eshndx; | |
575 | Elf_Internal_Sym isym; | |
576 | ||
577 | /* First we need to ensure the symbol table is available. Make sure | |
578 | that it is a symbol table section. */ | |
579 | if (ghdr->sh_link >= elf_numsections (abfd)) | |
580 | return NULL; | |
581 | hdr = elf_elfsections (abfd) [ghdr->sh_link]; | |
582 | if (hdr->sh_type != SHT_SYMTAB | |
583 | || ! bfd_section_from_shdr (abfd, ghdr->sh_link)) | |
584 | return NULL; | |
585 | ||
586 | /* Go read the symbol. */ | |
587 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
588 | if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info, | |
589 | &isym, esym, &eshndx) == NULL) | |
590 | return NULL; | |
591 | ||
592 | return bfd_elf_sym_name (abfd, hdr, &isym, NULL); | |
593 | } | |
594 | ||
595 | /* Set next_in_group list pointer, and group name for NEWSECT. */ | |
596 | ||
597 | static bool | |
598 | setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect) | |
599 | { | |
600 | unsigned int num_group = elf_tdata (abfd)->num_group; | |
601 | ||
602 | /* If num_group is zero, read in all SHT_GROUP sections. The count | |
603 | is set to -1 if there are no SHT_GROUP sections. */ | |
604 | if (num_group == 0) | |
605 | { | |
606 | unsigned int i, shnum; | |
607 | ||
608 | /* First count the number of groups. If we have a SHT_GROUP | |
609 | section with just a flag word (ie. sh_size is 4), ignore it. */ | |
610 | shnum = elf_numsections (abfd); | |
611 | num_group = 0; | |
612 | ||
613 | #define IS_VALID_GROUP_SECTION_HEADER(shdr, minsize) \ | |
614 | ( (shdr)->sh_type == SHT_GROUP \ | |
615 | && (shdr)->sh_size >= minsize \ | |
616 | && (shdr)->sh_entsize == GRP_ENTRY_SIZE \ | |
617 | && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0) | |
618 | ||
619 | for (i = 0; i < shnum; i++) | |
620 | { | |
621 | Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i]; | |
622 | ||
623 | if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE)) | |
624 | num_group += 1; | |
625 | } | |
626 | ||
627 | if (num_group == 0) | |
628 | { | |
629 | num_group = (unsigned) -1; | |
630 | elf_tdata (abfd)->num_group = num_group; | |
631 | elf_tdata (abfd)->group_sect_ptr = NULL; | |
632 | } | |
633 | else | |
634 | { | |
635 | /* We keep a list of elf section headers for group sections, | |
636 | so we can find them quickly. */ | |
637 | size_t amt; | |
638 | ||
639 | elf_tdata (abfd)->num_group = num_group; | |
640 | amt = num_group * sizeof (Elf_Internal_Shdr *); | |
641 | elf_tdata (abfd)->group_sect_ptr | |
642 | = (Elf_Internal_Shdr **) bfd_zalloc (abfd, amt); | |
643 | if (elf_tdata (abfd)->group_sect_ptr == NULL) | |
644 | return false; | |
645 | num_group = 0; | |
646 | ||
647 | for (i = 0; i < shnum; i++) | |
648 | { | |
649 | Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i]; | |
650 | ||
651 | if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE)) | |
652 | { | |
653 | unsigned char *src; | |
654 | Elf_Internal_Group *dest; | |
655 | ||
656 | /* Make sure the group section has a BFD section | |
657 | attached to it. */ | |
658 | if (!bfd_section_from_shdr (abfd, i)) | |
659 | return false; | |
660 | ||
661 | /* Add to list of sections. */ | |
662 | elf_tdata (abfd)->group_sect_ptr[num_group] = shdr; | |
663 | num_group += 1; | |
664 | ||
665 | /* Read the raw contents. */ | |
666 | BFD_ASSERT (sizeof (*dest) >= 4 && sizeof (*dest) % 4 == 0); | |
667 | shdr->contents = NULL; | |
668 | if (_bfd_mul_overflow (shdr->sh_size, | |
669 | sizeof (*dest) / 4, &amt) | |
670 | || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0 | |
671 | || !(shdr->contents | |
672 | = _bfd_alloc_and_read (abfd, amt, shdr->sh_size))) | |
673 | { | |
674 | _bfd_error_handler | |
675 | /* xgettext:c-format */ | |
676 | (_("%pB: invalid size field in group section" | |
677 | " header: %#" PRIx64 ""), | |
678 | abfd, (uint64_t) shdr->sh_size); | |
679 | bfd_set_error (bfd_error_bad_value); | |
680 | -- num_group; | |
681 | continue; | |
682 | } | |
683 | ||
684 | /* Translate raw contents, a flag word followed by an | |
685 | array of elf section indices all in target byte order, | |
686 | to the flag word followed by an array of elf section | |
687 | pointers. */ | |
688 | src = shdr->contents + shdr->sh_size; | |
689 | dest = (Elf_Internal_Group *) (shdr->contents + amt); | |
690 | ||
691 | while (1) | |
692 | { | |
693 | unsigned int idx; | |
694 | ||
695 | src -= 4; | |
696 | --dest; | |
697 | idx = H_GET_32 (abfd, src); | |
698 | if (src == shdr->contents) | |
699 | { | |
700 | dest->shdr = NULL; | |
701 | dest->flags = idx; | |
702 | if (shdr->bfd_section != NULL && (idx & GRP_COMDAT)) | |
703 | shdr->bfd_section->flags | |
704 | |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; | |
705 | break; | |
706 | } | |
707 | if (idx < shnum) | |
708 | { | |
709 | dest->shdr = elf_elfsections (abfd)[idx]; | |
710 | /* PR binutils/23199: All sections in a | |
711 | section group should be marked with | |
712 | SHF_GROUP. But some tools generate | |
713 | broken objects without SHF_GROUP. Fix | |
714 | them up here. */ | |
715 | dest->shdr->sh_flags |= SHF_GROUP; | |
716 | } | |
717 | if (idx >= shnum | |
718 | || dest->shdr->sh_type == SHT_GROUP) | |
719 | { | |
720 | _bfd_error_handler | |
721 | (_("%pB: invalid entry in SHT_GROUP section [%u]"), | |
722 | abfd, i); | |
723 | dest->shdr = NULL; | |
724 | } | |
725 | } | |
726 | } | |
727 | } | |
728 | ||
729 | /* PR 17510: Corrupt binaries might contain invalid groups. */ | |
730 | if (num_group != (unsigned) elf_tdata (abfd)->num_group) | |
731 | { | |
732 | elf_tdata (abfd)->num_group = num_group; | |
733 | ||
734 | /* If all groups are invalid then fail. */ | |
735 | if (num_group == 0) | |
736 | { | |
737 | elf_tdata (abfd)->group_sect_ptr = NULL; | |
738 | elf_tdata (abfd)->num_group = num_group = -1; | |
739 | _bfd_error_handler | |
740 | (_("%pB: no valid group sections found"), abfd); | |
741 | bfd_set_error (bfd_error_bad_value); | |
742 | } | |
743 | } | |
744 | } | |
745 | } | |
746 | ||
747 | if (num_group != (unsigned) -1) | |
748 | { | |
749 | unsigned int search_offset = elf_tdata (abfd)->group_search_offset; | |
750 | unsigned int j; | |
751 | ||
752 | for (j = 0; j < num_group; j++) | |
753 | { | |
754 | /* Begin search from previous found group. */ | |
755 | unsigned i = (j + search_offset) % num_group; | |
756 | ||
757 | Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i]; | |
758 | Elf_Internal_Group *idx; | |
759 | bfd_size_type n_elt; | |
760 | ||
761 | if (shdr == NULL) | |
762 | continue; | |
763 | ||
764 | idx = (Elf_Internal_Group *) shdr->contents; | |
765 | if (idx == NULL || shdr->sh_size < 4) | |
766 | { | |
767 | /* See PR 21957 for a reproducer. */ | |
768 | /* xgettext:c-format */ | |
769 | _bfd_error_handler (_("%pB: group section '%pA' has no contents"), | |
770 | abfd, shdr->bfd_section); | |
771 | elf_tdata (abfd)->group_sect_ptr[i] = NULL; | |
772 | bfd_set_error (bfd_error_bad_value); | |
773 | return false; | |
774 | } | |
775 | n_elt = shdr->sh_size / 4; | |
776 | ||
777 | /* Look through this group's sections to see if current | |
778 | section is a member. */ | |
779 | while (--n_elt != 0) | |
780 | if ((++idx)->shdr == hdr) | |
781 | { | |
782 | asection *s = NULL; | |
783 | ||
784 | /* We are a member of this group. Go looking through | |
785 | other members to see if any others are linked via | |
786 | next_in_group. */ | |
787 | idx = (Elf_Internal_Group *) shdr->contents; | |
788 | n_elt = shdr->sh_size / 4; | |
789 | while (--n_elt != 0) | |
790 | if ((++idx)->shdr != NULL | |
791 | && (s = idx->shdr->bfd_section) != NULL | |
792 | && elf_next_in_group (s) != NULL) | |
793 | break; | |
794 | if (n_elt != 0) | |
795 | { | |
796 | /* Snarf the group name from other member, and | |
797 | insert current section in circular list. */ | |
798 | elf_group_name (newsect) = elf_group_name (s); | |
799 | elf_next_in_group (newsect) = elf_next_in_group (s); | |
800 | elf_next_in_group (s) = newsect; | |
801 | } | |
802 | else | |
803 | { | |
804 | const char *gname; | |
805 | ||
806 | gname = group_signature (abfd, shdr); | |
807 | if (gname == NULL) | |
808 | return false; | |
809 | elf_group_name (newsect) = gname; | |
810 | ||
811 | /* Start a circular list with one element. */ | |
812 | elf_next_in_group (newsect) = newsect; | |
813 | } | |
814 | ||
815 | /* If the group section has been created, point to the | |
816 | new member. */ | |
817 | if (shdr->bfd_section != NULL) | |
818 | elf_next_in_group (shdr->bfd_section) = newsect; | |
819 | ||
820 | elf_tdata (abfd)->group_search_offset = i; | |
821 | j = num_group - 1; | |
822 | break; | |
823 | } | |
824 | } | |
825 | } | |
826 | ||
827 | if (elf_group_name (newsect) == NULL) | |
828 | { | |
829 | /* xgettext:c-format */ | |
830 | _bfd_error_handler (_("%pB: no group info for section '%pA'"), | |
831 | abfd, newsect); | |
832 | return false; | |
833 | } | |
834 | return true; | |
835 | } | |
836 | ||
837 | bool | |
838 | _bfd_elf_setup_sections (bfd *abfd) | |
839 | { | |
840 | unsigned int i; | |
841 | unsigned int num_group = elf_tdata (abfd)->num_group; | |
842 | bool result = true; | |
843 | asection *s; | |
844 | ||
845 | /* Process SHF_LINK_ORDER. */ | |
846 | for (s = abfd->sections; s != NULL; s = s->next) | |
847 | { | |
848 | Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr; | |
849 | if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0) | |
850 | { | |
851 | unsigned int elfsec = this_hdr->sh_link; | |
852 | /* An sh_link value of 0 is now allowed. It indicates that linked | |
853 | to section has already been discarded, but that the current | |
854 | section has been retained for some other reason. This linking | |
855 | section is still a candidate for later garbage collection | |
856 | however. */ | |
857 | if (elfsec == 0) | |
858 | { | |
859 | elf_linked_to_section (s) = NULL; | |
860 | } | |
861 | else | |
862 | { | |
863 | asection *linksec = NULL; | |
864 | ||
865 | if (elfsec < elf_numsections (abfd)) | |
866 | { | |
867 | this_hdr = elf_elfsections (abfd)[elfsec]; | |
868 | linksec = this_hdr->bfd_section; | |
869 | } | |
870 | ||
871 | /* PR 1991, 2008: | |
872 | Some strip/objcopy may leave an incorrect value in | |
873 | sh_link. We don't want to proceed. */ | |
874 | if (linksec == NULL) | |
875 | { | |
876 | _bfd_error_handler | |
877 | /* xgettext:c-format */ | |
878 | (_("%pB: sh_link [%d] in section `%pA' is incorrect"), | |
879 | s->owner, elfsec, s); | |
880 | result = false; | |
881 | } | |
882 | ||
883 | elf_linked_to_section (s) = linksec; | |
884 | } | |
885 | } | |
886 | else if (this_hdr->sh_type == SHT_GROUP | |
887 | && elf_next_in_group (s) == NULL) | |
888 | { | |
889 | _bfd_error_handler | |
890 | /* xgettext:c-format */ | |
891 | (_("%pB: SHT_GROUP section [index %d] has no SHF_GROUP sections"), | |
892 | abfd, elf_section_data (s)->this_idx); | |
893 | result = false; | |
894 | } | |
895 | } | |
896 | ||
897 | /* Process section groups. */ | |
898 | if (num_group == (unsigned) -1) | |
899 | return result; | |
900 | ||
901 | for (i = 0; i < num_group; i++) | |
902 | { | |
903 | Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i]; | |
904 | Elf_Internal_Group *idx; | |
905 | unsigned int n_elt; | |
906 | ||
907 | /* PR binutils/18758: Beware of corrupt binaries with invalid group data. */ | |
908 | if (shdr == NULL || shdr->bfd_section == NULL || shdr->contents == NULL) | |
909 | { | |
910 | _bfd_error_handler | |
911 | /* xgettext:c-format */ | |
912 | (_("%pB: section group entry number %u is corrupt"), | |
913 | abfd, i); | |
914 | result = false; | |
915 | continue; | |
916 | } | |
917 | ||
918 | idx = (Elf_Internal_Group *) shdr->contents; | |
919 | n_elt = shdr->sh_size / 4; | |
920 | ||
921 | while (--n_elt != 0) | |
922 | { | |
923 | ++ idx; | |
924 | ||
925 | if (idx->shdr == NULL) | |
926 | continue; | |
927 | else if (idx->shdr->bfd_section) | |
928 | elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section; | |
929 | else if (idx->shdr->sh_type != SHT_RELA | |
930 | && idx->shdr->sh_type != SHT_REL) | |
931 | { | |
932 | /* There are some unknown sections in the group. */ | |
933 | _bfd_error_handler | |
934 | /* xgettext:c-format */ | |
935 | (_("%pB: unknown type [%#x] section `%s' in group [%pA]"), | |
936 | abfd, | |
937 | idx->shdr->sh_type, | |
938 | bfd_elf_string_from_elf_section (abfd, | |
939 | (elf_elfheader (abfd) | |
940 | ->e_shstrndx), | |
941 | idx->shdr->sh_name), | |
942 | shdr->bfd_section); | |
943 | result = false; | |
944 | } | |
945 | } | |
946 | } | |
947 | ||
948 | return result; | |
949 | } | |
950 | ||
951 | bool | |
952 | bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec) | |
953 | { | |
954 | return elf_next_in_group (sec) != NULL; | |
955 | } | |
956 | ||
957 | const char * | |
958 | bfd_elf_group_name (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec) | |
959 | { | |
960 | if (elf_sec_group (sec) != NULL) | |
961 | return elf_group_name (sec); | |
962 | return NULL; | |
963 | } | |
964 | ||
965 | static char * | |
966 | convert_debug_to_zdebug (bfd *abfd, const char *name) | |
967 | { | |
968 | unsigned int len = strlen (name); | |
969 | char *new_name = bfd_alloc (abfd, len + 2); | |
970 | if (new_name == NULL) | |
971 | return NULL; | |
972 | new_name[0] = '.'; | |
973 | new_name[1] = 'z'; | |
974 | memcpy (new_name + 2, name + 1, len); | |
975 | return new_name; | |
976 | } | |
977 | ||
978 | static char * | |
979 | convert_zdebug_to_debug (bfd *abfd, const char *name) | |
980 | { | |
981 | unsigned int len = strlen (name); | |
982 | char *new_name = bfd_alloc (abfd, len); | |
983 | if (new_name == NULL) | |
984 | return NULL; | |
985 | new_name[0] = '.'; | |
986 | memcpy (new_name + 1, name + 2, len - 1); | |
987 | return new_name; | |
988 | } | |
989 | ||
990 | /* This a copy of lto_section defined in GCC (lto-streamer.h). */ | |
991 | ||
992 | struct lto_section | |
993 | { | |
994 | int16_t major_version; | |
995 | int16_t minor_version; | |
996 | unsigned char slim_object; | |
997 | ||
998 | /* Flags is a private field that is not defined publicly. */ | |
999 | uint16_t flags; | |
1000 | }; | |
1001 | ||
1002 | /* Make a BFD section from an ELF section. We store a pointer to the | |
1003 | BFD section in the bfd_section field of the header. */ | |
1004 | ||
1005 | bool | |
1006 | _bfd_elf_make_section_from_shdr (bfd *abfd, | |
1007 | Elf_Internal_Shdr *hdr, | |
1008 | const char *name, | |
1009 | int shindex) | |
1010 | { | |
1011 | asection *newsect; | |
1012 | flagword flags; | |
1013 | const struct elf_backend_data *bed; | |
1014 | unsigned int opb = bfd_octets_per_byte (abfd, NULL); | |
1015 | ||
1016 | if (hdr->bfd_section != NULL) | |
1017 | return true; | |
1018 | ||
1019 | newsect = bfd_make_section_anyway (abfd, name); | |
1020 | if (newsect == NULL) | |
1021 | return false; | |
1022 | ||
1023 | hdr->bfd_section = newsect; | |
1024 | elf_section_data (newsect)->this_hdr = *hdr; | |
1025 | elf_section_data (newsect)->this_idx = shindex; | |
1026 | ||
1027 | /* Always use the real type/flags. */ | |
1028 | elf_section_type (newsect) = hdr->sh_type; | |
1029 | elf_section_flags (newsect) = hdr->sh_flags; | |
1030 | ||
1031 | newsect->filepos = hdr->sh_offset; | |
1032 | ||
1033 | flags = SEC_NO_FLAGS; | |
1034 | if (hdr->sh_type != SHT_NOBITS) | |
1035 | flags |= SEC_HAS_CONTENTS; | |
1036 | if (hdr->sh_type == SHT_GROUP) | |
1037 | flags |= SEC_GROUP; | |
1038 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
1039 | { | |
1040 | flags |= SEC_ALLOC; | |
1041 | if (hdr->sh_type != SHT_NOBITS) | |
1042 | flags |= SEC_LOAD; | |
1043 | } | |
1044 | if ((hdr->sh_flags & SHF_WRITE) == 0) | |
1045 | flags |= SEC_READONLY; | |
1046 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1047 | flags |= SEC_CODE; | |
1048 | else if ((flags & SEC_LOAD) != 0) | |
1049 | flags |= SEC_DATA; | |
1050 | if ((hdr->sh_flags & SHF_MERGE) != 0) | |
1051 | { | |
1052 | flags |= SEC_MERGE; | |
1053 | newsect->entsize = hdr->sh_entsize; | |
1054 | } | |
1055 | if ((hdr->sh_flags & SHF_STRINGS) != 0) | |
1056 | flags |= SEC_STRINGS; | |
1057 | if (hdr->sh_flags & SHF_GROUP) | |
1058 | if (!setup_group (abfd, hdr, newsect)) | |
1059 | return false; | |
1060 | if ((hdr->sh_flags & SHF_TLS) != 0) | |
1061 | flags |= SEC_THREAD_LOCAL; | |
1062 | if ((hdr->sh_flags & SHF_EXCLUDE) != 0) | |
1063 | flags |= SEC_EXCLUDE; | |
1064 | ||
1065 | switch (elf_elfheader (abfd)->e_ident[EI_OSABI]) | |
1066 | { | |
1067 | /* FIXME: We should not recognize SHF_GNU_MBIND for ELFOSABI_NONE, | |
1068 | but binutils as of 2019-07-23 did not set the EI_OSABI header | |
1069 | byte. */ | |
1070 | case ELFOSABI_GNU: | |
1071 | case ELFOSABI_FREEBSD: | |
1072 | if ((hdr->sh_flags & SHF_GNU_RETAIN) != 0) | |
1073 | elf_tdata (abfd)->has_gnu_osabi |= elf_gnu_osabi_retain; | |
1074 | /* Fall through */ | |
1075 | case ELFOSABI_NONE: | |
1076 | if ((hdr->sh_flags & SHF_GNU_MBIND) != 0) | |
1077 | elf_tdata (abfd)->has_gnu_osabi |= elf_gnu_osabi_mbind; | |
1078 | break; | |
1079 | } | |
1080 | ||
1081 | if ((flags & SEC_ALLOC) == 0) | |
1082 | { | |
1083 | /* The debugging sections appear to be recognized only by name, | |
1084 | not any sort of flag. Their SEC_ALLOC bits are cleared. */ | |
1085 | if (name [0] == '.') | |
1086 | { | |
1087 | if (startswith (name, ".debug") | |
1088 | || startswith (name, ".gnu.debuglto_.debug_") | |
1089 | || startswith (name, ".gnu.linkonce.wi.") | |
1090 | || startswith (name, ".zdebug")) | |
1091 | flags |= SEC_DEBUGGING | SEC_ELF_OCTETS; | |
1092 | else if (startswith (name, GNU_BUILD_ATTRS_SECTION_NAME) | |
1093 | || startswith (name, ".note.gnu")) | |
1094 | { | |
1095 | flags |= SEC_ELF_OCTETS; | |
1096 | opb = 1; | |
1097 | } | |
1098 | else if (startswith (name, ".line") | |
1099 | || startswith (name, ".stab") | |
1100 | || strcmp (name, ".gdb_index") == 0) | |
1101 | flags |= SEC_DEBUGGING; | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | if (!bfd_set_section_vma (newsect, hdr->sh_addr / opb) | |
1106 | || !bfd_set_section_size (newsect, hdr->sh_size) | |
1107 | || !bfd_set_section_alignment (newsect, bfd_log2 (hdr->sh_addralign))) | |
1108 | return false; | |
1109 | ||
1110 | /* As a GNU extension, if the name begins with .gnu.linkonce, we | |
1111 | only link a single copy of the section. This is used to support | |
1112 | g++. g++ will emit each template expansion in its own section. | |
1113 | The symbols will be defined as weak, so that multiple definitions | |
1114 | are permitted. The GNU linker extension is to actually discard | |
1115 | all but one of the sections. */ | |
1116 | if (startswith (name, ".gnu.linkonce") | |
1117 | && elf_next_in_group (newsect) == NULL) | |
1118 | flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; | |
1119 | ||
1120 | if (!bfd_set_section_flags (newsect, flags)) | |
1121 | return false; | |
1122 | ||
1123 | bed = get_elf_backend_data (abfd); | |
1124 | if (bed->elf_backend_section_flags) | |
1125 | if (!bed->elf_backend_section_flags (hdr)) | |
1126 | return false; | |
1127 | ||
1128 | /* We do not parse the PT_NOTE segments as we are interested even in the | |
1129 | separate debug info files which may have the segments offsets corrupted. | |
1130 | PT_NOTEs from the core files are currently not parsed using BFD. */ | |
1131 | if (hdr->sh_type == SHT_NOTE) | |
1132 | { | |
1133 | bfd_byte *contents; | |
1134 | ||
1135 | if (!bfd_malloc_and_get_section (abfd, newsect, &contents)) | |
1136 | return false; | |
1137 | ||
1138 | elf_parse_notes (abfd, (char *) contents, hdr->sh_size, | |
1139 | hdr->sh_offset, hdr->sh_addralign); | |
1140 | free (contents); | |
1141 | } | |
1142 | ||
1143 | if ((newsect->flags & SEC_ALLOC) != 0) | |
1144 | { | |
1145 | Elf_Internal_Phdr *phdr; | |
1146 | unsigned int i, nload; | |
1147 | ||
1148 | /* Some ELF linkers produce binaries with all the program header | |
1149 | p_paddr fields zero. If we have such a binary with more than | |
1150 | one PT_LOAD header, then leave the section lma equal to vma | |
1151 | so that we don't create sections with overlapping lma. */ | |
1152 | phdr = elf_tdata (abfd)->phdr; | |
1153 | for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
1154 | if (phdr->p_paddr != 0) | |
1155 | break; | |
1156 | else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0) | |
1157 | ++nload; | |
1158 | if (i >= elf_elfheader (abfd)->e_phnum && nload > 1) | |
1159 | return true; | |
1160 | ||
1161 | phdr = elf_tdata (abfd)->phdr; | |
1162 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
1163 | { | |
1164 | if (((phdr->p_type == PT_LOAD | |
1165 | && (hdr->sh_flags & SHF_TLS) == 0) | |
1166 | || phdr->p_type == PT_TLS) | |
1167 | && ELF_SECTION_IN_SEGMENT (hdr, phdr)) | |
1168 | { | |
1169 | if ((newsect->flags & SEC_LOAD) == 0) | |
1170 | newsect->lma = (phdr->p_paddr | |
1171 | + hdr->sh_addr - phdr->p_vaddr) / opb; | |
1172 | else | |
1173 | /* We used to use the same adjustment for SEC_LOAD | |
1174 | sections, but that doesn't work if the segment | |
1175 | is packed with code from multiple VMAs. | |
1176 | Instead we calculate the section LMA based on | |
1177 | the segment LMA. It is assumed that the | |
1178 | segment will contain sections with contiguous | |
1179 | LMAs, even if the VMAs are not. */ | |
1180 | newsect->lma = (phdr->p_paddr | |
1181 | + hdr->sh_offset - phdr->p_offset) / opb; | |
1182 | ||
1183 | /* With contiguous segments, we can't tell from file | |
1184 | offsets whether a section with zero size should | |
1185 | be placed at the end of one segment or the | |
1186 | beginning of the next. Decide based on vaddr. */ | |
1187 | if (hdr->sh_addr >= phdr->p_vaddr | |
1188 | && (hdr->sh_addr + hdr->sh_size | |
1189 | <= phdr->p_vaddr + phdr->p_memsz)) | |
1190 | break; | |
1191 | } | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | /* Compress/decompress DWARF debug sections with names: .debug_* and | |
1196 | .zdebug_*, after the section flags is set. */ | |
1197 | if ((newsect->flags & SEC_DEBUGGING) | |
1198 | && ((name[1] == 'd' && name[6] == '_') | |
1199 | || (name[1] == 'z' && name[7] == '_'))) | |
1200 | { | |
1201 | enum { nothing, compress, decompress } action = nothing; | |
1202 | int compression_header_size; | |
1203 | bfd_size_type uncompressed_size; | |
1204 | unsigned int uncompressed_align_power; | |
1205 | bool compressed | |
1206 | = bfd_is_section_compressed_with_header (abfd, newsect, | |
1207 | &compression_header_size, | |
1208 | &uncompressed_size, | |
1209 | &uncompressed_align_power); | |
1210 | if (compressed) | |
1211 | { | |
1212 | /* Compressed section. Check if we should decompress. */ | |
1213 | if ((abfd->flags & BFD_DECOMPRESS)) | |
1214 | action = decompress; | |
1215 | } | |
1216 | ||
1217 | /* Compress the uncompressed section or convert from/to .zdebug* | |
1218 | section. Check if we should compress. */ | |
1219 | if (action == nothing) | |
1220 | { | |
1221 | if (newsect->size != 0 | |
1222 | && (abfd->flags & BFD_COMPRESS) | |
1223 | && compression_header_size >= 0 | |
1224 | && uncompressed_size > 0 | |
1225 | && (!compressed | |
1226 | || ((compression_header_size > 0) | |
1227 | != ((abfd->flags & BFD_COMPRESS_GABI) != 0)))) | |
1228 | action = compress; | |
1229 | else | |
1230 | return true; | |
1231 | } | |
1232 | ||
1233 | if (action == compress) | |
1234 | { | |
1235 | if (!bfd_init_section_compress_status (abfd, newsect)) | |
1236 | { | |
1237 | _bfd_error_handler | |
1238 | /* xgettext:c-format */ | |
1239 | (_("%pB: unable to initialize compress status for section %s"), | |
1240 | abfd, name); | |
1241 | return false; | |
1242 | } | |
1243 | } | |
1244 | else | |
1245 | { | |
1246 | if (!bfd_init_section_decompress_status (abfd, newsect)) | |
1247 | { | |
1248 | _bfd_error_handler | |
1249 | /* xgettext:c-format */ | |
1250 | (_("%pB: unable to initialize decompress status for section %s"), | |
1251 | abfd, name); | |
1252 | return false; | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | if (abfd->is_linker_input) | |
1257 | { | |
1258 | if (name[1] == 'z' | |
1259 | && (action == decompress | |
1260 | || (action == compress | |
1261 | && (abfd->flags & BFD_COMPRESS_GABI) != 0))) | |
1262 | { | |
1263 | /* Convert section name from .zdebug_* to .debug_* so | |
1264 | that linker will consider this section as a debug | |
1265 | section. */ | |
1266 | char *new_name = convert_zdebug_to_debug (abfd, name); | |
1267 | if (new_name == NULL) | |
1268 | return false; | |
1269 | bfd_rename_section (newsect, new_name); | |
1270 | } | |
1271 | } | |
1272 | else | |
1273 | /* For objdump, don't rename the section. For objcopy, delay | |
1274 | section rename to elf_fake_sections. */ | |
1275 | newsect->flags |= SEC_ELF_RENAME; | |
1276 | } | |
1277 | ||
1278 | /* GCC uses .gnu.lto_.lto.<some_hash> as a LTO bytecode information | |
1279 | section. */ | |
1280 | if (startswith (name, ".gnu.lto_.lto.")) | |
1281 | { | |
1282 | struct lto_section lsection; | |
1283 | if (bfd_get_section_contents (abfd, newsect, &lsection, 0, | |
1284 | sizeof (struct lto_section))) | |
1285 | abfd->lto_slim_object = lsection.slim_object; | |
1286 | } | |
1287 | ||
1288 | return true; | |
1289 | } | |
1290 | ||
1291 | const char *const bfd_elf_section_type_names[] = | |
1292 | { | |
1293 | "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB", | |
1294 | "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE", | |
1295 | "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM", | |
1296 | }; | |
1297 | ||
1298 | /* ELF relocs are against symbols. If we are producing relocatable | |
1299 | output, and the reloc is against an external symbol, and nothing | |
1300 | has given us any additional addend, the resulting reloc will also | |
1301 | be against the same symbol. In such a case, we don't want to | |
1302 | change anything about the way the reloc is handled, since it will | |
1303 | all be done at final link time. Rather than put special case code | |
1304 | into bfd_perform_relocation, all the reloc types use this howto | |
1305 | function, or should call this function for relocatable output. */ | |
1306 | ||
1307 | bfd_reloc_status_type | |
1308 | bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED, | |
1309 | arelent *reloc_entry, | |
1310 | asymbol *symbol, | |
1311 | void *data ATTRIBUTE_UNUSED, | |
1312 | asection *input_section, | |
1313 | bfd *output_bfd, | |
1314 | char **error_message ATTRIBUTE_UNUSED) | |
1315 | { | |
1316 | if (output_bfd != NULL | |
1317 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1318 | && (! reloc_entry->howto->partial_inplace | |
1319 | || reloc_entry->addend == 0)) | |
1320 | { | |
1321 | reloc_entry->address += input_section->output_offset; | |
1322 | return bfd_reloc_ok; | |
1323 | } | |
1324 | ||
1325 | /* In some cases the relocation should be treated as output section | |
1326 | relative, as when linking ELF DWARF into PE COFF. Many ELF | |
1327 | targets lack section relative relocations and instead use | |
1328 | ordinary absolute relocations for references between DWARF | |
1329 | sections. That is arguably a bug in those targets but it happens | |
1330 | to work for the usual case of linking to non-loaded ELF debug | |
1331 | sections with VMAs forced to zero. PE COFF on the other hand | |
1332 | doesn't allow a section VMA of zero. */ | |
1333 | if (output_bfd == NULL | |
1334 | && !reloc_entry->howto->pc_relative | |
1335 | && (symbol->section->flags & SEC_DEBUGGING) != 0 | |
1336 | && (input_section->flags & SEC_DEBUGGING) != 0) | |
1337 | reloc_entry->addend -= symbol->section->output_section->vma; | |
1338 | ||
1339 | return bfd_reloc_continue; | |
1340 | } | |
1341 | \f | |
1342 | /* Returns TRUE if section A matches section B. | |
1343 | Names, addresses and links may be different, but everything else | |
1344 | should be the same. */ | |
1345 | ||
1346 | static bool | |
1347 | section_match (const Elf_Internal_Shdr * a, | |
1348 | const Elf_Internal_Shdr * b) | |
1349 | { | |
1350 | if (a->sh_type != b->sh_type | |
1351 | || ((a->sh_flags ^ b->sh_flags) & ~SHF_INFO_LINK) != 0 | |
1352 | || a->sh_addralign != b->sh_addralign | |
1353 | || a->sh_entsize != b->sh_entsize) | |
1354 | return false; | |
1355 | if (a->sh_type == SHT_SYMTAB | |
1356 | || a->sh_type == SHT_STRTAB) | |
1357 | return true; | |
1358 | return a->sh_size == b->sh_size; | |
1359 | } | |
1360 | ||
1361 | /* Find a section in OBFD that has the same characteristics | |
1362 | as IHEADER. Return the index of this section or SHN_UNDEF if | |
1363 | none can be found. Check's section HINT first, as this is likely | |
1364 | to be the correct section. */ | |
1365 | ||
1366 | static unsigned int | |
1367 | find_link (const bfd *obfd, const Elf_Internal_Shdr *iheader, | |
1368 | const unsigned int hint) | |
1369 | { | |
1370 | Elf_Internal_Shdr ** oheaders = elf_elfsections (obfd); | |
1371 | unsigned int i; | |
1372 | ||
1373 | BFD_ASSERT (iheader != NULL); | |
1374 | ||
1375 | /* See PR 20922 for a reproducer of the NULL test. */ | |
1376 | if (hint < elf_numsections (obfd) | |
1377 | && oheaders[hint] != NULL | |
1378 | && section_match (oheaders[hint], iheader)) | |
1379 | return hint; | |
1380 | ||
1381 | for (i = 1; i < elf_numsections (obfd); i++) | |
1382 | { | |
1383 | Elf_Internal_Shdr * oheader = oheaders[i]; | |
1384 | ||
1385 | if (oheader == NULL) | |
1386 | continue; | |
1387 | if (section_match (oheader, iheader)) | |
1388 | /* FIXME: Do we care if there is a potential for | |
1389 | multiple matches ? */ | |
1390 | return i; | |
1391 | } | |
1392 | ||
1393 | return SHN_UNDEF; | |
1394 | } | |
1395 | ||
1396 | /* PR 19938: Attempt to set the ELF section header fields of an OS or | |
1397 | Processor specific section, based upon a matching input section. | |
1398 | Returns TRUE upon success, FALSE otherwise. */ | |
1399 | ||
1400 | static bool | |
1401 | copy_special_section_fields (const bfd *ibfd, | |
1402 | bfd *obfd, | |
1403 | const Elf_Internal_Shdr *iheader, | |
1404 | Elf_Internal_Shdr *oheader, | |
1405 | const unsigned int secnum) | |
1406 | { | |
1407 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
1408 | const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd); | |
1409 | bool changed = false; | |
1410 | unsigned int sh_link; | |
1411 | ||
1412 | if (oheader->sh_type == SHT_NOBITS) | |
1413 | { | |
1414 | /* This is a feature for objcopy --only-keep-debug: | |
1415 | When a section's type is changed to NOBITS, we preserve | |
1416 | the sh_link and sh_info fields so that they can be | |
1417 | matched up with the original. | |
1418 | ||
1419 | Note: Strictly speaking these assignments are wrong. | |
1420 | The sh_link and sh_info fields should point to the | |
1421 | relevent sections in the output BFD, which may not be in | |
1422 | the same location as they were in the input BFD. But | |
1423 | the whole point of this action is to preserve the | |
1424 | original values of the sh_link and sh_info fields, so | |
1425 | that they can be matched up with the section headers in | |
1426 | the original file. So strictly speaking we may be | |
1427 | creating an invalid ELF file, but it is only for a file | |
1428 | that just contains debug info and only for sections | |
1429 | without any contents. */ | |
1430 | if (oheader->sh_link == 0) | |
1431 | oheader->sh_link = iheader->sh_link; | |
1432 | if (oheader->sh_info == 0) | |
1433 | oheader->sh_info = iheader->sh_info; | |
1434 | return true; | |
1435 | } | |
1436 | ||
1437 | /* Allow the target a chance to decide how these fields should be set. */ | |
1438 | if (bed->elf_backend_copy_special_section_fields (ibfd, obfd, | |
1439 | iheader, oheader)) | |
1440 | return true; | |
1441 | ||
1442 | /* We have an iheader which might match oheader, and which has non-zero | |
1443 | sh_info and/or sh_link fields. Attempt to follow those links and find | |
1444 | the section in the output bfd which corresponds to the linked section | |
1445 | in the input bfd. */ | |
1446 | if (iheader->sh_link != SHN_UNDEF) | |
1447 | { | |
1448 | /* See PR 20931 for a reproducer. */ | |
1449 | if (iheader->sh_link >= elf_numsections (ibfd)) | |
1450 | { | |
1451 | _bfd_error_handler | |
1452 | /* xgettext:c-format */ | |
1453 | (_("%pB: invalid sh_link field (%d) in section number %d"), | |
1454 | ibfd, iheader->sh_link, secnum); | |
1455 | return false; | |
1456 | } | |
1457 | ||
1458 | sh_link = find_link (obfd, iheaders[iheader->sh_link], iheader->sh_link); | |
1459 | if (sh_link != SHN_UNDEF) | |
1460 | { | |
1461 | oheader->sh_link = sh_link; | |
1462 | changed = true; | |
1463 | } | |
1464 | else | |
1465 | /* FIXME: Should we install iheader->sh_link | |
1466 | if we could not find a match ? */ | |
1467 | _bfd_error_handler | |
1468 | /* xgettext:c-format */ | |
1469 | (_("%pB: failed to find link section for section %d"), obfd, secnum); | |
1470 | } | |
1471 | ||
1472 | if (iheader->sh_info) | |
1473 | { | |
1474 | /* The sh_info field can hold arbitrary information, but if the | |
1475 | SHF_LINK_INFO flag is set then it should be interpreted as a | |
1476 | section index. */ | |
1477 | if (iheader->sh_flags & SHF_INFO_LINK) | |
1478 | { | |
1479 | sh_link = find_link (obfd, iheaders[iheader->sh_info], | |
1480 | iheader->sh_info); | |
1481 | if (sh_link != SHN_UNDEF) | |
1482 | oheader->sh_flags |= SHF_INFO_LINK; | |
1483 | } | |
1484 | else | |
1485 | /* No idea what it means - just copy it. */ | |
1486 | sh_link = iheader->sh_info; | |
1487 | ||
1488 | if (sh_link != SHN_UNDEF) | |
1489 | { | |
1490 | oheader->sh_info = sh_link; | |
1491 | changed = true; | |
1492 | } | |
1493 | else | |
1494 | _bfd_error_handler | |
1495 | /* xgettext:c-format */ | |
1496 | (_("%pB: failed to find info section for section %d"), obfd, secnum); | |
1497 | } | |
1498 | ||
1499 | return changed; | |
1500 | } | |
1501 | ||
1502 | /* Copy the program header and other data from one object module to | |
1503 | another. */ | |
1504 | ||
1505 | bool | |
1506 | _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
1507 | { | |
1508 | const Elf_Internal_Shdr **iheaders = (const Elf_Internal_Shdr **) elf_elfsections (ibfd); | |
1509 | Elf_Internal_Shdr **oheaders = elf_elfsections (obfd); | |
1510 | const struct elf_backend_data *bed; | |
1511 | unsigned int i; | |
1512 | ||
1513 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1514 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1515 | return true; | |
1516 | ||
1517 | if (!elf_flags_init (obfd)) | |
1518 | { | |
1519 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
1520 | elf_flags_init (obfd) = true; | |
1521 | } | |
1522 | ||
1523 | elf_gp (obfd) = elf_gp (ibfd); | |
1524 | ||
1525 | /* Also copy the EI_OSABI field. */ | |
1526 | elf_elfheader (obfd)->e_ident[EI_OSABI] = | |
1527 | elf_elfheader (ibfd)->e_ident[EI_OSABI]; | |
1528 | ||
1529 | /* If set, copy the EI_ABIVERSION field. */ | |
1530 | if (elf_elfheader (ibfd)->e_ident[EI_ABIVERSION]) | |
1531 | elf_elfheader (obfd)->e_ident[EI_ABIVERSION] | |
1532 | = elf_elfheader (ibfd)->e_ident[EI_ABIVERSION]; | |
1533 | ||
1534 | /* Copy object attributes. */ | |
1535 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
1536 | ||
1537 | if (iheaders == NULL || oheaders == NULL) | |
1538 | return true; | |
1539 | ||
1540 | bed = get_elf_backend_data (obfd); | |
1541 | ||
1542 | /* Possibly copy other fields in the section header. */ | |
1543 | for (i = 1; i < elf_numsections (obfd); i++) | |
1544 | { | |
1545 | unsigned int j; | |
1546 | Elf_Internal_Shdr * oheader = oheaders[i]; | |
1547 | ||
1548 | /* Ignore ordinary sections. SHT_NOBITS sections are considered however | |
1549 | because of a special case need for generating separate debug info | |
1550 | files. See below for more details. */ | |
1551 | if (oheader == NULL | |
1552 | || (oheader->sh_type != SHT_NOBITS | |
1553 | && oheader->sh_type < SHT_LOOS)) | |
1554 | continue; | |
1555 | ||
1556 | /* Ignore empty sections, and sections whose | |
1557 | fields have already been initialised. */ | |
1558 | if (oheader->sh_size == 0 | |
1559 | || (oheader->sh_info != 0 && oheader->sh_link != 0)) | |
1560 | continue; | |
1561 | ||
1562 | /* Scan for the matching section in the input bfd. | |
1563 | First we try for a direct mapping between the input and output sections. */ | |
1564 | for (j = 1; j < elf_numsections (ibfd); j++) | |
1565 | { | |
1566 | const Elf_Internal_Shdr * iheader = iheaders[j]; | |
1567 | ||
1568 | if (iheader == NULL) | |
1569 | continue; | |
1570 | ||
1571 | if (oheader->bfd_section != NULL | |
1572 | && iheader->bfd_section != NULL | |
1573 | && iheader->bfd_section->output_section != NULL | |
1574 | && iheader->bfd_section->output_section == oheader->bfd_section) | |
1575 | { | |
1576 | /* We have found a connection from the input section to the | |
1577 | output section. Attempt to copy the header fields. If | |
1578 | this fails then do not try any further sections - there | |
1579 | should only be a one-to-one mapping between input and output. */ | |
1580 | if (! copy_special_section_fields (ibfd, obfd, iheader, oheader, i)) | |
1581 | j = elf_numsections (ibfd); | |
1582 | break; | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | if (j < elf_numsections (ibfd)) | |
1587 | continue; | |
1588 | ||
1589 | /* That failed. So try to deduce the corresponding input section. | |
1590 | Unfortunately we cannot compare names as the output string table | |
1591 | is empty, so instead we check size, address and type. */ | |
1592 | for (j = 1; j < elf_numsections (ibfd); j++) | |
1593 | { | |
1594 | const Elf_Internal_Shdr * iheader = iheaders[j]; | |
1595 | ||
1596 | if (iheader == NULL) | |
1597 | continue; | |
1598 | ||
1599 | /* Try matching fields in the input section's header. | |
1600 | Since --only-keep-debug turns all non-debug sections into | |
1601 | SHT_NOBITS sections, the output SHT_NOBITS type matches any | |
1602 | input type. */ | |
1603 | if ((oheader->sh_type == SHT_NOBITS | |
1604 | || iheader->sh_type == oheader->sh_type) | |
1605 | && (iheader->sh_flags & ~ SHF_INFO_LINK) | |
1606 | == (oheader->sh_flags & ~ SHF_INFO_LINK) | |
1607 | && iheader->sh_addralign == oheader->sh_addralign | |
1608 | && iheader->sh_entsize == oheader->sh_entsize | |
1609 | && iheader->sh_size == oheader->sh_size | |
1610 | && iheader->sh_addr == oheader->sh_addr | |
1611 | && (iheader->sh_info != oheader->sh_info | |
1612 | || iheader->sh_link != oheader->sh_link)) | |
1613 | { | |
1614 | if (copy_special_section_fields (ibfd, obfd, iheader, oheader, i)) | |
1615 | break; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | if (j == elf_numsections (ibfd) && oheader->sh_type >= SHT_LOOS) | |
1620 | { | |
1621 | /* Final attempt. Call the backend copy function | |
1622 | with a NULL input section. */ | |
1623 | (void) bed->elf_backend_copy_special_section_fields (ibfd, obfd, | |
1624 | NULL, oheader); | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | return true; | |
1629 | } | |
1630 | ||
1631 | static const char * | |
1632 | get_segment_type (unsigned int p_type) | |
1633 | { | |
1634 | const char *pt; | |
1635 | switch (p_type) | |
1636 | { | |
1637 | case PT_NULL: pt = "NULL"; break; | |
1638 | case PT_LOAD: pt = "LOAD"; break; | |
1639 | case PT_DYNAMIC: pt = "DYNAMIC"; break; | |
1640 | case PT_INTERP: pt = "INTERP"; break; | |
1641 | case PT_NOTE: pt = "NOTE"; break; | |
1642 | case PT_SHLIB: pt = "SHLIB"; break; | |
1643 | case PT_PHDR: pt = "PHDR"; break; | |
1644 | case PT_TLS: pt = "TLS"; break; | |
1645 | case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break; | |
1646 | case PT_GNU_STACK: pt = "STACK"; break; | |
1647 | case PT_GNU_RELRO: pt = "RELRO"; break; | |
1648 | default: pt = NULL; break; | |
1649 | } | |
1650 | return pt; | |
1651 | } | |
1652 | ||
1653 | /* Print out the program headers. */ | |
1654 | ||
1655 | bool | |
1656 | _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg) | |
1657 | { | |
1658 | FILE *f = (FILE *) farg; | |
1659 | Elf_Internal_Phdr *p; | |
1660 | asection *s; | |
1661 | bfd_byte *dynbuf = NULL; | |
1662 | ||
1663 | p = elf_tdata (abfd)->phdr; | |
1664 | if (p != NULL) | |
1665 | { | |
1666 | unsigned int i, c; | |
1667 | ||
1668 | fprintf (f, _("\nProgram Header:\n")); | |
1669 | c = elf_elfheader (abfd)->e_phnum; | |
1670 | for (i = 0; i < c; i++, p++) | |
1671 | { | |
1672 | const char *pt = get_segment_type (p->p_type); | |
1673 | char buf[20]; | |
1674 | ||
1675 | if (pt == NULL) | |
1676 | { | |
1677 | sprintf (buf, "0x%lx", p->p_type); | |
1678 | pt = buf; | |
1679 | } | |
1680 | fprintf (f, "%8s off 0x", pt); | |
1681 | bfd_fprintf_vma (abfd, f, p->p_offset); | |
1682 | fprintf (f, " vaddr 0x"); | |
1683 | bfd_fprintf_vma (abfd, f, p->p_vaddr); | |
1684 | fprintf (f, " paddr 0x"); | |
1685 | bfd_fprintf_vma (abfd, f, p->p_paddr); | |
1686 | fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align)); | |
1687 | fprintf (f, " filesz 0x"); | |
1688 | bfd_fprintf_vma (abfd, f, p->p_filesz); | |
1689 | fprintf (f, " memsz 0x"); | |
1690 | bfd_fprintf_vma (abfd, f, p->p_memsz); | |
1691 | fprintf (f, " flags %c%c%c", | |
1692 | (p->p_flags & PF_R) != 0 ? 'r' : '-', | |
1693 | (p->p_flags & PF_W) != 0 ? 'w' : '-', | |
1694 | (p->p_flags & PF_X) != 0 ? 'x' : '-'); | |
1695 | if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0) | |
1696 | fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)); | |
1697 | fprintf (f, "\n"); | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
1702 | if (s != NULL) | |
1703 | { | |
1704 | unsigned int elfsec; | |
1705 | unsigned long shlink; | |
1706 | bfd_byte *extdyn, *extdynend; | |
1707 | size_t extdynsize; | |
1708 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
1709 | ||
1710 | fprintf (f, _("\nDynamic Section:\n")); | |
1711 | ||
1712 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
1713 | goto error_return; | |
1714 | ||
1715 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
1716 | if (elfsec == SHN_BAD) | |
1717 | goto error_return; | |
1718 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
1719 | ||
1720 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; | |
1721 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
1722 | ||
1723 | extdyn = dynbuf; | |
1724 | /* PR 17512: file: 6f427532. */ | |
1725 | if (s->size < extdynsize) | |
1726 | goto error_return; | |
1727 | extdynend = extdyn + s->size; | |
1728 | /* PR 17512: file: id:000006,sig:06,src:000000,op:flip4,pos:5664. | |
1729 | Fix range check. */ | |
1730 | for (; extdyn <= (extdynend - extdynsize); extdyn += extdynsize) | |
1731 | { | |
1732 | Elf_Internal_Dyn dyn; | |
1733 | const char *name = ""; | |
1734 | char ab[20]; | |
1735 | bool stringp; | |
1736 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1737 | ||
1738 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
1739 | ||
1740 | if (dyn.d_tag == DT_NULL) | |
1741 | break; | |
1742 | ||
1743 | stringp = false; | |
1744 | switch (dyn.d_tag) | |
1745 | { | |
1746 | default: | |
1747 | if (bed->elf_backend_get_target_dtag) | |
1748 | name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag); | |
1749 | ||
1750 | if (!strcmp (name, "")) | |
1751 | { | |
1752 | sprintf (ab, "%#" BFD_VMA_FMT "x", dyn.d_tag); | |
1753 | name = ab; | |
1754 | } | |
1755 | break; | |
1756 | ||
1757 | case DT_NEEDED: name = "NEEDED"; stringp = true; break; | |
1758 | case DT_PLTRELSZ: name = "PLTRELSZ"; break; | |
1759 | case DT_PLTGOT: name = "PLTGOT"; break; | |
1760 | case DT_HASH: name = "HASH"; break; | |
1761 | case DT_STRTAB: name = "STRTAB"; break; | |
1762 | case DT_SYMTAB: name = "SYMTAB"; break; | |
1763 | case DT_RELA: name = "RELA"; break; | |
1764 | case DT_RELASZ: name = "RELASZ"; break; | |
1765 | case DT_RELAENT: name = "RELAENT"; break; | |
1766 | case DT_STRSZ: name = "STRSZ"; break; | |
1767 | case DT_SYMENT: name = "SYMENT"; break; | |
1768 | case DT_INIT: name = "INIT"; break; | |
1769 | case DT_FINI: name = "FINI"; break; | |
1770 | case DT_SONAME: name = "SONAME"; stringp = true; break; | |
1771 | case DT_RPATH: name = "RPATH"; stringp = true; break; | |
1772 | case DT_SYMBOLIC: name = "SYMBOLIC"; break; | |
1773 | case DT_REL: name = "REL"; break; | |
1774 | case DT_RELSZ: name = "RELSZ"; break; | |
1775 | case DT_RELENT: name = "RELENT"; break; | |
1776 | case DT_RELR: name = "RELR"; break; | |
1777 | case DT_RELRSZ: name = "RELRSZ"; break; | |
1778 | case DT_RELRENT: name = "RELRENT"; break; | |
1779 | case DT_PLTREL: name = "PLTREL"; break; | |
1780 | case DT_DEBUG: name = "DEBUG"; break; | |
1781 | case DT_TEXTREL: name = "TEXTREL"; break; | |
1782 | case DT_JMPREL: name = "JMPREL"; break; | |
1783 | case DT_BIND_NOW: name = "BIND_NOW"; break; | |
1784 | case DT_INIT_ARRAY: name = "INIT_ARRAY"; break; | |
1785 | case DT_FINI_ARRAY: name = "FINI_ARRAY"; break; | |
1786 | case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break; | |
1787 | case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break; | |
1788 | case DT_RUNPATH: name = "RUNPATH"; stringp = true; break; | |
1789 | case DT_FLAGS: name = "FLAGS"; break; | |
1790 | case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break; | |
1791 | case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break; | |
1792 | case DT_CHECKSUM: name = "CHECKSUM"; break; | |
1793 | case DT_PLTPADSZ: name = "PLTPADSZ"; break; | |
1794 | case DT_MOVEENT: name = "MOVEENT"; break; | |
1795 | case DT_MOVESZ: name = "MOVESZ"; break; | |
1796 | case DT_FEATURE: name = "FEATURE"; break; | |
1797 | case DT_POSFLAG_1: name = "POSFLAG_1"; break; | |
1798 | case DT_SYMINSZ: name = "SYMINSZ"; break; | |
1799 | case DT_SYMINENT: name = "SYMINENT"; break; | |
1800 | case DT_CONFIG: name = "CONFIG"; stringp = true; break; | |
1801 | case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = true; break; | |
1802 | case DT_AUDIT: name = "AUDIT"; stringp = true; break; | |
1803 | case DT_PLTPAD: name = "PLTPAD"; break; | |
1804 | case DT_MOVETAB: name = "MOVETAB"; break; | |
1805 | case DT_SYMINFO: name = "SYMINFO"; break; | |
1806 | case DT_RELACOUNT: name = "RELACOUNT"; break; | |
1807 | case DT_RELCOUNT: name = "RELCOUNT"; break; | |
1808 | case DT_FLAGS_1: name = "FLAGS_1"; break; | |
1809 | case DT_VERSYM: name = "VERSYM"; break; | |
1810 | case DT_VERDEF: name = "VERDEF"; break; | |
1811 | case DT_VERDEFNUM: name = "VERDEFNUM"; break; | |
1812 | case DT_VERNEED: name = "VERNEED"; break; | |
1813 | case DT_VERNEEDNUM: name = "VERNEEDNUM"; break; | |
1814 | case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break; | |
1815 | case DT_USED: name = "USED"; break; | |
1816 | case DT_FILTER: name = "FILTER"; stringp = true; break; | |
1817 | case DT_GNU_HASH: name = "GNU_HASH"; break; | |
1818 | } | |
1819 | ||
1820 | fprintf (f, " %-20s ", name); | |
1821 | if (! stringp) | |
1822 | { | |
1823 | fprintf (f, "0x"); | |
1824 | bfd_fprintf_vma (abfd, f, dyn.d_un.d_val); | |
1825 | } | |
1826 | else | |
1827 | { | |
1828 | const char *string; | |
1829 | unsigned int tagv = dyn.d_un.d_val; | |
1830 | ||
1831 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
1832 | if (string == NULL) | |
1833 | goto error_return; | |
1834 | fprintf (f, "%s", string); | |
1835 | } | |
1836 | fprintf (f, "\n"); | |
1837 | } | |
1838 | ||
1839 | free (dynbuf); | |
1840 | dynbuf = NULL; | |
1841 | } | |
1842 | ||
1843 | if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL) | |
1844 | || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL)) | |
1845 | { | |
1846 | if (! _bfd_elf_slurp_version_tables (abfd, false)) | |
1847 | return false; | |
1848 | } | |
1849 | ||
1850 | if (elf_dynverdef (abfd) != 0) | |
1851 | { | |
1852 | Elf_Internal_Verdef *t; | |
1853 | ||
1854 | fprintf (f, _("\nVersion definitions:\n")); | |
1855 | for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef) | |
1856 | { | |
1857 | fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx, | |
1858 | t->vd_flags, t->vd_hash, | |
1859 | t->vd_nodename ? t->vd_nodename : "<corrupt>"); | |
1860 | if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL) | |
1861 | { | |
1862 | Elf_Internal_Verdaux *a; | |
1863 | ||
1864 | fprintf (f, "\t"); | |
1865 | for (a = t->vd_auxptr->vda_nextptr; | |
1866 | a != NULL; | |
1867 | a = a->vda_nextptr) | |
1868 | fprintf (f, "%s ", | |
1869 | a->vda_nodename ? a->vda_nodename : "<corrupt>"); | |
1870 | fprintf (f, "\n"); | |
1871 | } | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | if (elf_dynverref (abfd) != 0) | |
1876 | { | |
1877 | Elf_Internal_Verneed *t; | |
1878 | ||
1879 | fprintf (f, _("\nVersion References:\n")); | |
1880 | for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref) | |
1881 | { | |
1882 | Elf_Internal_Vernaux *a; | |
1883 | ||
1884 | fprintf (f, _(" required from %s:\n"), | |
1885 | t->vn_filename ? t->vn_filename : "<corrupt>"); | |
1886 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1887 | fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash, | |
1888 | a->vna_flags, a->vna_other, | |
1889 | a->vna_nodename ? a->vna_nodename : "<corrupt>"); | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | return true; | |
1894 | ||
1895 | error_return: | |
1896 | free (dynbuf); | |
1897 | return false; | |
1898 | } | |
1899 | ||
1900 | /* Get version name. If BASE_P is TRUE, return "Base" for VER_FLG_BASE | |
1901 | and return symbol version for symbol version itself. */ | |
1902 | ||
1903 | const char * | |
1904 | _bfd_elf_get_symbol_version_string (bfd *abfd, asymbol *symbol, | |
1905 | bool base_p, | |
1906 | bool *hidden) | |
1907 | { | |
1908 | const char *version_string = NULL; | |
1909 | if (elf_dynversym (abfd) != 0 | |
1910 | && (elf_dynverdef (abfd) != 0 || elf_dynverref (abfd) != 0)) | |
1911 | { | |
1912 | unsigned int vernum = ((elf_symbol_type *) symbol)->version; | |
1913 | ||
1914 | *hidden = (vernum & VERSYM_HIDDEN) != 0; | |
1915 | vernum &= VERSYM_VERSION; | |
1916 | ||
1917 | if (vernum == 0) | |
1918 | version_string = ""; | |
1919 | else if (vernum == 1 | |
1920 | && (vernum > elf_tdata (abfd)->cverdefs | |
1921 | || (elf_tdata (abfd)->verdef[0].vd_flags | |
1922 | == VER_FLG_BASE))) | |
1923 | version_string = base_p ? "Base" : ""; | |
1924 | else if (vernum <= elf_tdata (abfd)->cverdefs) | |
1925 | { | |
1926 | const char *nodename | |
1927 | = elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
1928 | version_string = ""; | |
1929 | if (base_p | |
1930 | || nodename == NULL | |
1931 | || symbol->name == NULL | |
1932 | || strcmp (symbol->name, nodename) != 0) | |
1933 | version_string = nodename; | |
1934 | } | |
1935 | else | |
1936 | { | |
1937 | Elf_Internal_Verneed *t; | |
1938 | ||
1939 | version_string = _("<corrupt>"); | |
1940 | for (t = elf_tdata (abfd)->verref; | |
1941 | t != NULL; | |
1942 | t = t->vn_nextref) | |
1943 | { | |
1944 | Elf_Internal_Vernaux *a; | |
1945 | ||
1946 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1947 | { | |
1948 | if (a->vna_other == vernum) | |
1949 | { | |
1950 | *hidden = true; | |
1951 | version_string = a->vna_nodename; | |
1952 | break; | |
1953 | } | |
1954 | } | |
1955 | } | |
1956 | } | |
1957 | } | |
1958 | return version_string; | |
1959 | } | |
1960 | ||
1961 | /* Display ELF-specific fields of a symbol. */ | |
1962 | ||
1963 | void | |
1964 | bfd_elf_print_symbol (bfd *abfd, | |
1965 | void *filep, | |
1966 | asymbol *symbol, | |
1967 | bfd_print_symbol_type how) | |
1968 | { | |
1969 | FILE *file = (FILE *) filep; | |
1970 | switch (how) | |
1971 | { | |
1972 | case bfd_print_symbol_name: | |
1973 | fprintf (file, "%s", symbol->name); | |
1974 | break; | |
1975 | case bfd_print_symbol_more: | |
1976 | fprintf (file, "elf "); | |
1977 | bfd_fprintf_vma (abfd, file, symbol->value); | |
1978 | fprintf (file, " %x", symbol->flags); | |
1979 | break; | |
1980 | case bfd_print_symbol_all: | |
1981 | { | |
1982 | const char *section_name; | |
1983 | const char *name = NULL; | |
1984 | const struct elf_backend_data *bed; | |
1985 | unsigned char st_other; | |
1986 | bfd_vma val; | |
1987 | const char *version_string; | |
1988 | bool hidden; | |
1989 | ||
1990 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
1991 | ||
1992 | bed = get_elf_backend_data (abfd); | |
1993 | if (bed->elf_backend_print_symbol_all) | |
1994 | name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol); | |
1995 | ||
1996 | if (name == NULL) | |
1997 | { | |
1998 | name = symbol->name; | |
1999 | bfd_print_symbol_vandf (abfd, file, symbol); | |
2000 | } | |
2001 | ||
2002 | fprintf (file, " %s\t", section_name); | |
2003 | /* Print the "other" value for a symbol. For common symbols, | |
2004 | we've already printed the size; now print the alignment. | |
2005 | For other symbols, we have no specified alignment, and | |
2006 | we've printed the address; now print the size. */ | |
2007 | if (symbol->section && bfd_is_com_section (symbol->section)) | |
2008 | val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value; | |
2009 | else | |
2010 | val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size; | |
2011 | bfd_fprintf_vma (abfd, file, val); | |
2012 | ||
2013 | /* If we have version information, print it. */ | |
2014 | version_string = _bfd_elf_get_symbol_version_string (abfd, | |
2015 | symbol, | |
2016 | true, | |
2017 | &hidden); | |
2018 | if (version_string) | |
2019 | { | |
2020 | if (!hidden) | |
2021 | fprintf (file, " %-11s", version_string); | |
2022 | else | |
2023 | { | |
2024 | int i; | |
2025 | ||
2026 | fprintf (file, " (%s)", version_string); | |
2027 | for (i = 10 - strlen (version_string); i > 0; --i) | |
2028 | putc (' ', file); | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | /* If the st_other field is not zero, print it. */ | |
2033 | st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other; | |
2034 | ||
2035 | switch (st_other) | |
2036 | { | |
2037 | case 0: break; | |
2038 | case STV_INTERNAL: fprintf (file, " .internal"); break; | |
2039 | case STV_HIDDEN: fprintf (file, " .hidden"); break; | |
2040 | case STV_PROTECTED: fprintf (file, " .protected"); break; | |
2041 | default: | |
2042 | /* Some other non-defined flags are also present, so print | |
2043 | everything hex. */ | |
2044 | fprintf (file, " 0x%02x", (unsigned int) st_other); | |
2045 | } | |
2046 | ||
2047 | fprintf (file, " %s", name); | |
2048 | } | |
2049 | break; | |
2050 | } | |
2051 | } | |
2052 | \f | |
2053 | /* ELF .o/exec file reading */ | |
2054 | ||
2055 | /* Create a new bfd section from an ELF section header. */ | |
2056 | ||
2057 | bool | |
2058 | bfd_section_from_shdr (bfd *abfd, unsigned int shindex) | |
2059 | { | |
2060 | Elf_Internal_Shdr *hdr; | |
2061 | Elf_Internal_Ehdr *ehdr; | |
2062 | const struct elf_backend_data *bed; | |
2063 | const char *name; | |
2064 | bool ret = true; | |
2065 | ||
2066 | if (shindex >= elf_numsections (abfd)) | |
2067 | return false; | |
2068 | ||
2069 | /* PR17512: A corrupt ELF binary might contain a loop of sections via | |
2070 | sh_link or sh_info. Detect this here, by refusing to load a | |
2071 | section that we are already in the process of loading. */ | |
2072 | if (elf_tdata (abfd)->being_created[shindex]) | |
2073 | { | |
2074 | _bfd_error_handler | |
2075 | (_("%pB: warning: loop in section dependencies detected"), abfd); | |
2076 | return false; | |
2077 | } | |
2078 | elf_tdata (abfd)->being_created[shindex] = true; | |
2079 | ||
2080 | hdr = elf_elfsections (abfd)[shindex]; | |
2081 | ehdr = elf_elfheader (abfd); | |
2082 | name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx, | |
2083 | hdr->sh_name); | |
2084 | if (name == NULL) | |
2085 | goto fail; | |
2086 | ||
2087 | bed = get_elf_backend_data (abfd); | |
2088 | switch (hdr->sh_type) | |
2089 | { | |
2090 | case SHT_NULL: | |
2091 | /* Inactive section. Throw it away. */ | |
2092 | goto success; | |
2093 | ||
2094 | case SHT_PROGBITS: /* Normal section with contents. */ | |
2095 | case SHT_NOBITS: /* .bss section. */ | |
2096 | case SHT_HASH: /* .hash section. */ | |
2097 | case SHT_NOTE: /* .note section. */ | |
2098 | case SHT_INIT_ARRAY: /* .init_array section. */ | |
2099 | case SHT_FINI_ARRAY: /* .fini_array section. */ | |
2100 | case SHT_PREINIT_ARRAY: /* .preinit_array section. */ | |
2101 | case SHT_GNU_LIBLIST: /* .gnu.liblist section. */ | |
2102 | case SHT_GNU_HASH: /* .gnu.hash section. */ | |
2103 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
2104 | goto success; | |
2105 | ||
2106 | case SHT_DYNAMIC: /* Dynamic linking information. */ | |
2107 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) | |
2108 | goto fail; | |
2109 | ||
2110 | if (hdr->sh_link > elf_numsections (abfd)) | |
2111 | { | |
2112 | /* PR 10478: Accept Solaris binaries with a sh_link | |
2113 | field set to SHN_BEFORE or SHN_AFTER. */ | |
2114 | switch (bfd_get_arch (abfd)) | |
2115 | { | |
2116 | case bfd_arch_i386: | |
2117 | case bfd_arch_sparc: | |
2118 | if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */ | |
2119 | || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */) | |
2120 | break; | |
2121 | /* Otherwise fall through. */ | |
2122 | default: | |
2123 | goto fail; | |
2124 | } | |
2125 | } | |
2126 | else if (elf_elfsections (abfd)[hdr->sh_link] == NULL) | |
2127 | goto fail; | |
2128 | else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB) | |
2129 | { | |
2130 | Elf_Internal_Shdr *dynsymhdr; | |
2131 | ||
2132 | /* The shared libraries distributed with hpux11 have a bogus | |
2133 | sh_link field for the ".dynamic" section. Find the | |
2134 | string table for the ".dynsym" section instead. */ | |
2135 | if (elf_dynsymtab (abfd) != 0) | |
2136 | { | |
2137 | dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)]; | |
2138 | hdr->sh_link = dynsymhdr->sh_link; | |
2139 | } | |
2140 | else | |
2141 | { | |
2142 | unsigned int i, num_sec; | |
2143 | ||
2144 | num_sec = elf_numsections (abfd); | |
2145 | for (i = 1; i < num_sec; i++) | |
2146 | { | |
2147 | dynsymhdr = elf_elfsections (abfd)[i]; | |
2148 | if (dynsymhdr->sh_type == SHT_DYNSYM) | |
2149 | { | |
2150 | hdr->sh_link = dynsymhdr->sh_link; | |
2151 | break; | |
2152 | } | |
2153 | } | |
2154 | } | |
2155 | } | |
2156 | goto success; | |
2157 | ||
2158 | case SHT_SYMTAB: /* A symbol table. */ | |
2159 | if (elf_onesymtab (abfd) == shindex) | |
2160 | goto success; | |
2161 | ||
2162 | if (hdr->sh_entsize != bed->s->sizeof_sym) | |
2163 | goto fail; | |
2164 | ||
2165 | if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size) | |
2166 | { | |
2167 | if (hdr->sh_size != 0) | |
2168 | goto fail; | |
2169 | /* Some assemblers erroneously set sh_info to one with a | |
2170 | zero sh_size. ld sees this as a global symbol count | |
2171 | of (unsigned) -1. Fix it here. */ | |
2172 | hdr->sh_info = 0; | |
2173 | goto success; | |
2174 | } | |
2175 | ||
2176 | /* PR 18854: A binary might contain more than one symbol table. | |
2177 | Unusual, but possible. Warn, but continue. */ | |
2178 | if (elf_onesymtab (abfd) != 0) | |
2179 | { | |
2180 | _bfd_error_handler | |
2181 | /* xgettext:c-format */ | |
2182 | (_("%pB: warning: multiple symbol tables detected" | |
2183 | " - ignoring the table in section %u"), | |
2184 | abfd, shindex); | |
2185 | goto success; | |
2186 | } | |
2187 | elf_onesymtab (abfd) = shindex; | |
2188 | elf_symtab_hdr (abfd) = *hdr; | |
2189 | elf_elfsections (abfd)[shindex] = hdr = & elf_symtab_hdr (abfd); | |
2190 | abfd->flags |= HAS_SYMS; | |
2191 | ||
2192 | /* Sometimes a shared object will map in the symbol table. If | |
2193 | SHF_ALLOC is set, and this is a shared object, then we also | |
2194 | treat this section as a BFD section. We can not base the | |
2195 | decision purely on SHF_ALLOC, because that flag is sometimes | |
2196 | set in a relocatable object file, which would confuse the | |
2197 | linker. */ | |
2198 | if ((hdr->sh_flags & SHF_ALLOC) != 0 | |
2199 | && (abfd->flags & DYNAMIC) != 0 | |
2200 | && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name, | |
2201 | shindex)) | |
2202 | goto fail; | |
2203 | ||
2204 | /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we | |
2205 | can't read symbols without that section loaded as well. It | |
2206 | is most likely specified by the next section header. */ | |
2207 | { | |
2208 | elf_section_list * entry; | |
2209 | unsigned int i, num_sec; | |
2210 | ||
2211 | for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next) | |
2212 | if (entry->hdr.sh_link == shindex) | |
2213 | goto success; | |
2214 | ||
2215 | num_sec = elf_numsections (abfd); | |
2216 | for (i = shindex + 1; i < num_sec; i++) | |
2217 | { | |
2218 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; | |
2219 | ||
2220 | if (hdr2->sh_type == SHT_SYMTAB_SHNDX | |
2221 | && hdr2->sh_link == shindex) | |
2222 | break; | |
2223 | } | |
2224 | ||
2225 | if (i == num_sec) | |
2226 | for (i = 1; i < shindex; i++) | |
2227 | { | |
2228 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; | |
2229 | ||
2230 | if (hdr2->sh_type == SHT_SYMTAB_SHNDX | |
2231 | && hdr2->sh_link == shindex) | |
2232 | break; | |
2233 | } | |
2234 | ||
2235 | if (i != shindex) | |
2236 | ret = bfd_section_from_shdr (abfd, i); | |
2237 | /* else FIXME: we have failed to find the symbol table - should we issue an error ? */ | |
2238 | goto success; | |
2239 | } | |
2240 | ||
2241 | case SHT_DYNSYM: /* A dynamic symbol table. */ | |
2242 | if (elf_dynsymtab (abfd) == shindex) | |
2243 | goto success; | |
2244 | ||
2245 | if (hdr->sh_entsize != bed->s->sizeof_sym) | |
2246 | goto fail; | |
2247 | ||
2248 | if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size) | |
2249 | { | |
2250 | if (hdr->sh_size != 0) | |
2251 | goto fail; | |
2252 | ||
2253 | /* Some linkers erroneously set sh_info to one with a | |
2254 | zero sh_size. ld sees this as a global symbol count | |
2255 | of (unsigned) -1. Fix it here. */ | |
2256 | hdr->sh_info = 0; | |
2257 | goto success; | |
2258 | } | |
2259 | ||
2260 | /* PR 18854: A binary might contain more than one dynamic symbol table. | |
2261 | Unusual, but possible. Warn, but continue. */ | |
2262 | if (elf_dynsymtab (abfd) != 0) | |
2263 | { | |
2264 | _bfd_error_handler | |
2265 | /* xgettext:c-format */ | |
2266 | (_("%pB: warning: multiple dynamic symbol tables detected" | |
2267 | " - ignoring the table in section %u"), | |
2268 | abfd, shindex); | |
2269 | goto success; | |
2270 | } | |
2271 | elf_dynsymtab (abfd) = shindex; | |
2272 | elf_tdata (abfd)->dynsymtab_hdr = *hdr; | |
2273 | elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2274 | abfd->flags |= HAS_SYMS; | |
2275 | ||
2276 | /* Besides being a symbol table, we also treat this as a regular | |
2277 | section, so that objcopy can handle it. */ | |
2278 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
2279 | goto success; | |
2280 | ||
2281 | case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections. */ | |
2282 | { | |
2283 | elf_section_list * entry; | |
2284 | ||
2285 | for (entry = elf_symtab_shndx_list (abfd); entry != NULL; entry = entry->next) | |
2286 | if (entry->ndx == shindex) | |
2287 | goto success; | |
2288 | ||
2289 | entry = bfd_alloc (abfd, sizeof (*entry)); | |
2290 | if (entry == NULL) | |
2291 | goto fail; | |
2292 | entry->ndx = shindex; | |
2293 | entry->hdr = * hdr; | |
2294 | entry->next = elf_symtab_shndx_list (abfd); | |
2295 | elf_symtab_shndx_list (abfd) = entry; | |
2296 | elf_elfsections (abfd)[shindex] = & entry->hdr; | |
2297 | goto success; | |
2298 | } | |
2299 | ||
2300 | case SHT_STRTAB: /* A string table. */ | |
2301 | if (hdr->bfd_section != NULL) | |
2302 | goto success; | |
2303 | ||
2304 | if (ehdr->e_shstrndx == shindex) | |
2305 | { | |
2306 | elf_tdata (abfd)->shstrtab_hdr = *hdr; | |
2307 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; | |
2308 | goto success; | |
2309 | } | |
2310 | ||
2311 | if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex) | |
2312 | { | |
2313 | symtab_strtab: | |
2314 | elf_tdata (abfd)->strtab_hdr = *hdr; | |
2315 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr; | |
2316 | goto success; | |
2317 | } | |
2318 | ||
2319 | if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex) | |
2320 | { | |
2321 | dynsymtab_strtab: | |
2322 | elf_tdata (abfd)->dynstrtab_hdr = *hdr; | |
2323 | hdr = &elf_tdata (abfd)->dynstrtab_hdr; | |
2324 | elf_elfsections (abfd)[shindex] = hdr; | |
2325 | /* We also treat this as a regular section, so that objcopy | |
2326 | can handle it. */ | |
2327 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, | |
2328 | shindex); | |
2329 | goto success; | |
2330 | } | |
2331 | ||
2332 | /* If the string table isn't one of the above, then treat it as a | |
2333 | regular section. We need to scan all the headers to be sure, | |
2334 | just in case this strtab section appeared before the above. */ | |
2335 | if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0) | |
2336 | { | |
2337 | unsigned int i, num_sec; | |
2338 | ||
2339 | num_sec = elf_numsections (abfd); | |
2340 | for (i = 1; i < num_sec; i++) | |
2341 | { | |
2342 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; | |
2343 | if (hdr2->sh_link == shindex) | |
2344 | { | |
2345 | /* Prevent endless recursion on broken objects. */ | |
2346 | if (i == shindex) | |
2347 | goto fail; | |
2348 | if (! bfd_section_from_shdr (abfd, i)) | |
2349 | goto fail; | |
2350 | if (elf_onesymtab (abfd) == i) | |
2351 | goto symtab_strtab; | |
2352 | if (elf_dynsymtab (abfd) == i) | |
2353 | goto dynsymtab_strtab; | |
2354 | } | |
2355 | } | |
2356 | } | |
2357 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
2358 | goto success; | |
2359 | ||
2360 | case SHT_REL: | |
2361 | case SHT_RELA: | |
2362 | case SHT_RELR: | |
2363 | /* *These* do a lot of work -- but build no sections! */ | |
2364 | { | |
2365 | asection *target_sect; | |
2366 | Elf_Internal_Shdr *hdr2, **p_hdr; | |
2367 | unsigned int num_sec = elf_numsections (abfd); | |
2368 | struct bfd_elf_section_data *esdt; | |
2369 | bfd_size_type size; | |
2370 | ||
2371 | if (hdr->sh_type == SHT_REL) | |
2372 | size = bed->s->sizeof_rel; | |
2373 | else if (hdr->sh_type == SHT_RELA) | |
2374 | size = bed->s->sizeof_rela; | |
2375 | else | |
2376 | size = bed->s->arch_size / 8; | |
2377 | if (hdr->sh_entsize != size) | |
2378 | goto fail; | |
2379 | ||
2380 | /* Check for a bogus link to avoid crashing. */ | |
2381 | if (hdr->sh_link >= num_sec) | |
2382 | { | |
2383 | _bfd_error_handler | |
2384 | /* xgettext:c-format */ | |
2385 | (_("%pB: invalid link %u for reloc section %s (index %u)"), | |
2386 | abfd, hdr->sh_link, name, shindex); | |
2387 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, | |
2388 | shindex); | |
2389 | goto success; | |
2390 | } | |
2391 | ||
2392 | /* Get the symbol table. */ | |
2393 | if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB | |
2394 | || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM) | |
2395 | && ! bfd_section_from_shdr (abfd, hdr->sh_link)) | |
2396 | goto fail; | |
2397 | ||
2398 | /* If this is an alloc section in an executable or shared | |
2399 | library, or the reloc section does not use the main symbol | |
2400 | table we don't treat it as a reloc section. BFD can't | |
2401 | adequately represent such a section, so at least for now, | |
2402 | we don't try. We just present it as a normal section. We | |
2403 | also can't use it as a reloc section if it points to the | |
2404 | null section, an invalid section, another reloc section, or | |
2405 | its sh_link points to the null section. */ | |
2406 | if (((abfd->flags & (DYNAMIC | EXEC_P)) != 0 | |
2407 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
2408 | || hdr->sh_link == SHN_UNDEF | |
2409 | || hdr->sh_link != elf_onesymtab (abfd) | |
2410 | || hdr->sh_info == SHN_UNDEF | |
2411 | || hdr->sh_info >= num_sec | |
2412 | || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL | |
2413 | || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA) | |
2414 | { | |
2415 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, | |
2416 | shindex); | |
2417 | goto success; | |
2418 | } | |
2419 | ||
2420 | if (! bfd_section_from_shdr (abfd, hdr->sh_info)) | |
2421 | goto fail; | |
2422 | ||
2423 | target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info); | |
2424 | if (target_sect == NULL) | |
2425 | goto fail; | |
2426 | ||
2427 | esdt = elf_section_data (target_sect); | |
2428 | if (hdr->sh_type == SHT_RELA) | |
2429 | p_hdr = &esdt->rela.hdr; | |
2430 | else | |
2431 | p_hdr = &esdt->rel.hdr; | |
2432 | ||
2433 | /* PR 17512: file: 0b4f81b7. | |
2434 | Also see PR 24456, for a file which deliberately has two reloc | |
2435 | sections. */ | |
2436 | if (*p_hdr != NULL) | |
2437 | { | |
2438 | if (!bed->init_secondary_reloc_section (abfd, hdr, name, shindex)) | |
2439 | { | |
2440 | _bfd_error_handler | |
2441 | /* xgettext:c-format */ | |
2442 | (_("%pB: warning: secondary relocation section '%s' " | |
2443 | "for section %pA found - ignoring"), | |
2444 | abfd, name, target_sect); | |
2445 | } | |
2446 | else | |
2447 | esdt->has_secondary_relocs = true; | |
2448 | goto success; | |
2449 | } | |
2450 | ||
2451 | hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2)); | |
2452 | if (hdr2 == NULL) | |
2453 | goto fail; | |
2454 | *hdr2 = *hdr; | |
2455 | *p_hdr = hdr2; | |
2456 | elf_elfsections (abfd)[shindex] = hdr2; | |
2457 | target_sect->reloc_count += (NUM_SHDR_ENTRIES (hdr) | |
2458 | * bed->s->int_rels_per_ext_rel); | |
2459 | target_sect->flags |= SEC_RELOC; | |
2460 | target_sect->relocation = NULL; | |
2461 | target_sect->rel_filepos = hdr->sh_offset; | |
2462 | /* In the section to which the relocations apply, mark whether | |
2463 | its relocations are of the REL or RELA variety. */ | |
2464 | if (hdr->sh_size != 0) | |
2465 | { | |
2466 | if (hdr->sh_type == SHT_RELA) | |
2467 | target_sect->use_rela_p = 1; | |
2468 | } | |
2469 | abfd->flags |= HAS_RELOC; | |
2470 | goto success; | |
2471 | } | |
2472 | ||
2473 | case SHT_GNU_verdef: | |
2474 | elf_dynverdef (abfd) = shindex; | |
2475 | elf_tdata (abfd)->dynverdef_hdr = *hdr; | |
2476 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
2477 | goto success; | |
2478 | ||
2479 | case SHT_GNU_versym: | |
2480 | if (hdr->sh_entsize != sizeof (Elf_External_Versym)) | |
2481 | goto fail; | |
2482 | ||
2483 | elf_dynversym (abfd) = shindex; | |
2484 | elf_tdata (abfd)->dynversym_hdr = *hdr; | |
2485 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
2486 | goto success; | |
2487 | ||
2488 | case SHT_GNU_verneed: | |
2489 | elf_dynverref (abfd) = shindex; | |
2490 | elf_tdata (abfd)->dynverref_hdr = *hdr; | |
2491 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
2492 | goto success; | |
2493 | ||
2494 | case SHT_SHLIB: | |
2495 | goto success; | |
2496 | ||
2497 | case SHT_GROUP: | |
2498 | if (! IS_VALID_GROUP_SECTION_HEADER (hdr, GRP_ENTRY_SIZE)) | |
2499 | goto fail; | |
2500 | ||
2501 | if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) | |
2502 | goto fail; | |
2503 | ||
2504 | goto success; | |
2505 | ||
2506 | default: | |
2507 | /* Possibly an attributes section. */ | |
2508 | if (hdr->sh_type == SHT_GNU_ATTRIBUTES | |
2509 | || hdr->sh_type == bed->obj_attrs_section_type) | |
2510 | { | |
2511 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) | |
2512 | goto fail; | |
2513 | _bfd_elf_parse_attributes (abfd, hdr); | |
2514 | goto success; | |
2515 | } | |
2516 | ||
2517 | /* Check for any processor-specific section types. */ | |
2518 | if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex)) | |
2519 | goto success; | |
2520 | ||
2521 | if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER) | |
2522 | { | |
2523 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
2524 | /* FIXME: How to properly handle allocated section reserved | |
2525 | for applications? */ | |
2526 | _bfd_error_handler | |
2527 | /* xgettext:c-format */ | |
2528 | (_("%pB: unknown type [%#x] section `%s'"), | |
2529 | abfd, hdr->sh_type, name); | |
2530 | else | |
2531 | { | |
2532 | /* Allow sections reserved for applications. */ | |
2533 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, | |
2534 | shindex); | |
2535 | goto success; | |
2536 | } | |
2537 | } | |
2538 | else if (hdr->sh_type >= SHT_LOPROC | |
2539 | && hdr->sh_type <= SHT_HIPROC) | |
2540 | /* FIXME: We should handle this section. */ | |
2541 | _bfd_error_handler | |
2542 | /* xgettext:c-format */ | |
2543 | (_("%pB: unknown type [%#x] section `%s'"), | |
2544 | abfd, hdr->sh_type, name); | |
2545 | else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS) | |
2546 | { | |
2547 | /* Unrecognised OS-specific sections. */ | |
2548 | if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0) | |
2549 | /* SHF_OS_NONCONFORMING indicates that special knowledge is | |
2550 | required to correctly process the section and the file should | |
2551 | be rejected with an error message. */ | |
2552 | _bfd_error_handler | |
2553 | /* xgettext:c-format */ | |
2554 | (_("%pB: unknown type [%#x] section `%s'"), | |
2555 | abfd, hdr->sh_type, name); | |
2556 | else | |
2557 | { | |
2558 | /* Otherwise it should be processed. */ | |
2559 | ret = _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
2560 | goto success; | |
2561 | } | |
2562 | } | |
2563 | else | |
2564 | /* FIXME: We should handle this section. */ | |
2565 | _bfd_error_handler | |
2566 | /* xgettext:c-format */ | |
2567 | (_("%pB: unknown type [%#x] section `%s'"), | |
2568 | abfd, hdr->sh_type, name); | |
2569 | ||
2570 | goto fail; | |
2571 | } | |
2572 | ||
2573 | fail: | |
2574 | ret = false; | |
2575 | success: | |
2576 | elf_tdata (abfd)->being_created[shindex] = false; | |
2577 | return ret; | |
2578 | } | |
2579 | ||
2580 | /* Return the local symbol specified by ABFD, R_SYMNDX. */ | |
2581 | ||
2582 | Elf_Internal_Sym * | |
2583 | bfd_sym_from_r_symndx (struct sym_cache *cache, | |
2584 | bfd *abfd, | |
2585 | unsigned long r_symndx) | |
2586 | { | |
2587 | unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE; | |
2588 | ||
2589 | if (cache->abfd != abfd || cache->indx[ent] != r_symndx) | |
2590 | { | |
2591 | Elf_Internal_Shdr *symtab_hdr; | |
2592 | unsigned char esym[sizeof (Elf64_External_Sym)]; | |
2593 | Elf_External_Sym_Shndx eshndx; | |
2594 | ||
2595 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2596 | if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx, | |
2597 | &cache->sym[ent], esym, &eshndx) == NULL) | |
2598 | return NULL; | |
2599 | ||
2600 | if (cache->abfd != abfd) | |
2601 | { | |
2602 | memset (cache->indx, -1, sizeof (cache->indx)); | |
2603 | cache->abfd = abfd; | |
2604 | } | |
2605 | cache->indx[ent] = r_symndx; | |
2606 | } | |
2607 | ||
2608 | return &cache->sym[ent]; | |
2609 | } | |
2610 | ||
2611 | /* Given an ELF section number, retrieve the corresponding BFD | |
2612 | section. */ | |
2613 | ||
2614 | asection * | |
2615 | bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index) | |
2616 | { | |
2617 | if (sec_index >= elf_numsections (abfd)) | |
2618 | return NULL; | |
2619 | return elf_elfsections (abfd)[sec_index]->bfd_section; | |
2620 | } | |
2621 | ||
2622 | static const struct bfd_elf_special_section special_sections_b[] = | |
2623 | { | |
2624 | { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
2625 | { NULL, 0, 0, 0, 0 } | |
2626 | }; | |
2627 | ||
2628 | static const struct bfd_elf_special_section special_sections_c[] = | |
2629 | { | |
2630 | { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 }, | |
2631 | { STRING_COMMA_LEN (".ctf"), 0, SHT_PROGBITS, 0 }, | |
2632 | { NULL, 0, 0, 0, 0 } | |
2633 | }; | |
2634 | ||
2635 | static const struct bfd_elf_special_section special_sections_d[] = | |
2636 | { | |
2637 | { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
2638 | { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
2639 | /* There are more DWARF sections than these, but they needn't be added here | |
2640 | unless you have to cope with broken compilers that don't emit section | |
2641 | attributes or you want to help the user writing assembler. */ | |
2642 | { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 }, | |
2643 | { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 }, | |
2644 | { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 }, | |
2645 | { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 }, | |
2646 | { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 }, | |
2647 | { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC }, | |
2648 | { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC }, | |
2649 | { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC }, | |
2650 | { NULL, 0, 0, 0, 0 } | |
2651 | }; | |
2652 | ||
2653 | static const struct bfd_elf_special_section special_sections_f[] = | |
2654 | { | |
2655 | { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
2656 | { STRING_COMMA_LEN (".fini_array"), -2, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE }, | |
2657 | { NULL, 0 , 0, 0, 0 } | |
2658 | }; | |
2659 | ||
2660 | static const struct bfd_elf_special_section special_sections_g[] = | |
2661 | { | |
2662 | { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
2663 | { STRING_COMMA_LEN (".gnu.linkonce.n"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
2664 | { STRING_COMMA_LEN (".gnu.linkonce.p"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
2665 | { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE }, | |
2666 | { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
2667 | { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 }, | |
2668 | { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 }, | |
2669 | { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 }, | |
2670 | { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC }, | |
2671 | { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC }, | |
2672 | { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC }, | |
2673 | { NULL, 0, 0, 0, 0 } | |
2674 | }; | |
2675 | ||
2676 | static const struct bfd_elf_special_section special_sections_h[] = | |
2677 | { | |
2678 | { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC }, | |
2679 | { NULL, 0, 0, 0, 0 } | |
2680 | }; | |
2681 | ||
2682 | static const struct bfd_elf_special_section special_sections_i[] = | |
2683 | { | |
2684 | { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
2685 | { STRING_COMMA_LEN (".init_array"), -2, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE }, | |
2686 | { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 }, | |
2687 | { NULL, 0, 0, 0, 0 } | |
2688 | }; | |
2689 | ||
2690 | static const struct bfd_elf_special_section special_sections_l[] = | |
2691 | { | |
2692 | { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 }, | |
2693 | { NULL, 0, 0, 0, 0 } | |
2694 | }; | |
2695 | ||
2696 | static const struct bfd_elf_special_section special_sections_n[] = | |
2697 | { | |
2698 | { STRING_COMMA_LEN (".noinit"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
2699 | { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 }, | |
2700 | { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 }, | |
2701 | { NULL, 0, 0, 0, 0 } | |
2702 | }; | |
2703 | ||
2704 | static const struct bfd_elf_special_section special_sections_p[] = | |
2705 | { | |
2706 | { STRING_COMMA_LEN (".persistent.bss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
2707 | { STRING_COMMA_LEN (".persistent"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
2708 | { STRING_COMMA_LEN (".preinit_array"), -2, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE }, | |
2709 | { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
2710 | { NULL, 0, 0, 0, 0 } | |
2711 | }; | |
2712 | ||
2713 | static const struct bfd_elf_special_section special_sections_r[] = | |
2714 | { | |
2715 | { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC }, | |
2716 | { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC }, | |
2717 | { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 }, | |
2718 | { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 }, | |
2719 | { NULL, 0, 0, 0, 0 } | |
2720 | }; | |
2721 | ||
2722 | static const struct bfd_elf_special_section special_sections_s[] = | |
2723 | { | |
2724 | { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 }, | |
2725 | { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 }, | |
2726 | { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 }, | |
2727 | /* See struct bfd_elf_special_section declaration for the semantics of | |
2728 | this special case where .prefix_length != strlen (.prefix). */ | |
2729 | { ".stabstr", 5, 3, SHT_STRTAB, 0 }, | |
2730 | { NULL, 0, 0, 0, 0 } | |
2731 | }; | |
2732 | ||
2733 | static const struct bfd_elf_special_section special_sections_t[] = | |
2734 | { | |
2735 | { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
2736 | { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS }, | |
2737 | { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS }, | |
2738 | { NULL, 0, 0, 0, 0 } | |
2739 | }; | |
2740 | ||
2741 | static const struct bfd_elf_special_section special_sections_z[] = | |
2742 | { | |
2743 | { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 }, | |
2744 | { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 }, | |
2745 | { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 }, | |
2746 | { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 }, | |
2747 | { NULL, 0, 0, 0, 0 } | |
2748 | }; | |
2749 | ||
2750 | static const struct bfd_elf_special_section * const special_sections[] = | |
2751 | { | |
2752 | special_sections_b, /* 'b' */ | |
2753 | special_sections_c, /* 'c' */ | |
2754 | special_sections_d, /* 'd' */ | |
2755 | NULL, /* 'e' */ | |
2756 | special_sections_f, /* 'f' */ | |
2757 | special_sections_g, /* 'g' */ | |
2758 | special_sections_h, /* 'h' */ | |
2759 | special_sections_i, /* 'i' */ | |
2760 | NULL, /* 'j' */ | |
2761 | NULL, /* 'k' */ | |
2762 | special_sections_l, /* 'l' */ | |
2763 | NULL, /* 'm' */ | |
2764 | special_sections_n, /* 'n' */ | |
2765 | NULL, /* 'o' */ | |
2766 | special_sections_p, /* 'p' */ | |
2767 | NULL, /* 'q' */ | |
2768 | special_sections_r, /* 'r' */ | |
2769 | special_sections_s, /* 's' */ | |
2770 | special_sections_t, /* 't' */ | |
2771 | NULL, /* 'u' */ | |
2772 | NULL, /* 'v' */ | |
2773 | NULL, /* 'w' */ | |
2774 | NULL, /* 'x' */ | |
2775 | NULL, /* 'y' */ | |
2776 | special_sections_z /* 'z' */ | |
2777 | }; | |
2778 | ||
2779 | const struct bfd_elf_special_section * | |
2780 | _bfd_elf_get_special_section (const char *name, | |
2781 | const struct bfd_elf_special_section *spec, | |
2782 | unsigned int rela) | |
2783 | { | |
2784 | int i; | |
2785 | int len; | |
2786 | ||
2787 | len = strlen (name); | |
2788 | ||
2789 | for (i = 0; spec[i].prefix != NULL; i++) | |
2790 | { | |
2791 | int suffix_len; | |
2792 | int prefix_len = spec[i].prefix_length; | |
2793 | ||
2794 | if (len < prefix_len) | |
2795 | continue; | |
2796 | if (memcmp (name, spec[i].prefix, prefix_len) != 0) | |
2797 | continue; | |
2798 | ||
2799 | suffix_len = spec[i].suffix_length; | |
2800 | if (suffix_len <= 0) | |
2801 | { | |
2802 | if (name[prefix_len] != 0) | |
2803 | { | |
2804 | if (suffix_len == 0) | |
2805 | continue; | |
2806 | if (name[prefix_len] != '.' | |
2807 | && (suffix_len == -2 | |
2808 | || (rela && spec[i].type == SHT_REL))) | |
2809 | continue; | |
2810 | } | |
2811 | } | |
2812 | else | |
2813 | { | |
2814 | if (len < prefix_len + suffix_len) | |
2815 | continue; | |
2816 | if (memcmp (name + len - suffix_len, | |
2817 | spec[i].prefix + prefix_len, | |
2818 | suffix_len) != 0) | |
2819 | continue; | |
2820 | } | |
2821 | return &spec[i]; | |
2822 | } | |
2823 | ||
2824 | return NULL; | |
2825 | } | |
2826 | ||
2827 | const struct bfd_elf_special_section * | |
2828 | _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec) | |
2829 | { | |
2830 | int i; | |
2831 | const struct bfd_elf_special_section *spec; | |
2832 | const struct elf_backend_data *bed; | |
2833 | ||
2834 | /* See if this is one of the special sections. */ | |
2835 | if (sec->name == NULL) | |
2836 | return NULL; | |
2837 | ||
2838 | bed = get_elf_backend_data (abfd); | |
2839 | spec = bed->special_sections; | |
2840 | if (spec) | |
2841 | { | |
2842 | spec = _bfd_elf_get_special_section (sec->name, | |
2843 | bed->special_sections, | |
2844 | sec->use_rela_p); | |
2845 | if (spec != NULL) | |
2846 | return spec; | |
2847 | } | |
2848 | ||
2849 | if (sec->name[0] != '.') | |
2850 | return NULL; | |
2851 | ||
2852 | i = sec->name[1] - 'b'; | |
2853 | if (i < 0 || i > 'z' - 'b') | |
2854 | return NULL; | |
2855 | ||
2856 | spec = special_sections[i]; | |
2857 | ||
2858 | if (spec == NULL) | |
2859 | return NULL; | |
2860 | ||
2861 | return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p); | |
2862 | } | |
2863 | ||
2864 | bool | |
2865 | _bfd_elf_new_section_hook (bfd *abfd, asection *sec) | |
2866 | { | |
2867 | struct bfd_elf_section_data *sdata; | |
2868 | const struct elf_backend_data *bed; | |
2869 | const struct bfd_elf_special_section *ssect; | |
2870 | ||
2871 | sdata = (struct bfd_elf_section_data *) sec->used_by_bfd; | |
2872 | if (sdata == NULL) | |
2873 | { | |
2874 | sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, | |
2875 | sizeof (*sdata)); | |
2876 | if (sdata == NULL) | |
2877 | return false; | |
2878 | sec->used_by_bfd = sdata; | |
2879 | } | |
2880 | ||
2881 | /* Indicate whether or not this section should use RELA relocations. */ | |
2882 | bed = get_elf_backend_data (abfd); | |
2883 | sec->use_rela_p = bed->default_use_rela_p; | |
2884 | ||
2885 | /* Set up ELF section type and flags for newly created sections, if | |
2886 | there is an ABI mandated section. */ | |
2887 | ssect = (*bed->get_sec_type_attr) (abfd, sec); | |
2888 | if (ssect != NULL) | |
2889 | { | |
2890 | elf_section_type (sec) = ssect->type; | |
2891 | elf_section_flags (sec) = ssect->attr; | |
2892 | } | |
2893 | ||
2894 | return _bfd_generic_new_section_hook (abfd, sec); | |
2895 | } | |
2896 | ||
2897 | /* Create a new bfd section from an ELF program header. | |
2898 | ||
2899 | Since program segments have no names, we generate a synthetic name | |
2900 | of the form segment<NUM>, where NUM is generally the index in the | |
2901 | program header table. For segments that are split (see below) we | |
2902 | generate the names segment<NUM>a and segment<NUM>b. | |
2903 | ||
2904 | Note that some program segments may have a file size that is different than | |
2905 | (less than) the memory size. All this means is that at execution the | |
2906 | system must allocate the amount of memory specified by the memory size, | |
2907 | but only initialize it with the first "file size" bytes read from the | |
2908 | file. This would occur for example, with program segments consisting | |
2909 | of combined data+bss. | |
2910 | ||
2911 | To handle the above situation, this routine generates TWO bfd sections | |
2912 | for the single program segment. The first has the length specified by | |
2913 | the file size of the segment, and the second has the length specified | |
2914 | by the difference between the two sizes. In effect, the segment is split | |
2915 | into its initialized and uninitialized parts. | |
2916 | ||
2917 | */ | |
2918 | ||
2919 | bool | |
2920 | _bfd_elf_make_section_from_phdr (bfd *abfd, | |
2921 | Elf_Internal_Phdr *hdr, | |
2922 | int hdr_index, | |
2923 | const char *type_name) | |
2924 | { | |
2925 | asection *newsect; | |
2926 | char *name; | |
2927 | char namebuf[64]; | |
2928 | size_t len; | |
2929 | int split; | |
2930 | unsigned int opb = bfd_octets_per_byte (abfd, NULL); | |
2931 | ||
2932 | split = ((hdr->p_memsz > 0) | |
2933 | && (hdr->p_filesz > 0) | |
2934 | && (hdr->p_memsz > hdr->p_filesz)); | |
2935 | ||
2936 | if (hdr->p_filesz > 0) | |
2937 | { | |
2938 | sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : ""); | |
2939 | len = strlen (namebuf) + 1; | |
2940 | name = (char *) bfd_alloc (abfd, len); | |
2941 | if (!name) | |
2942 | return false; | |
2943 | memcpy (name, namebuf, len); | |
2944 | newsect = bfd_make_section (abfd, name); | |
2945 | if (newsect == NULL) | |
2946 | return false; | |
2947 | newsect->vma = hdr->p_vaddr / opb; | |
2948 | newsect->lma = hdr->p_paddr / opb; | |
2949 | newsect->size = hdr->p_filesz; | |
2950 | newsect->filepos = hdr->p_offset; | |
2951 | newsect->flags |= SEC_HAS_CONTENTS; | |
2952 | newsect->alignment_power = bfd_log2 (hdr->p_align); | |
2953 | if (hdr->p_type == PT_LOAD) | |
2954 | { | |
2955 | newsect->flags |= SEC_ALLOC; | |
2956 | newsect->flags |= SEC_LOAD; | |
2957 | if (hdr->p_flags & PF_X) | |
2958 | { | |
2959 | /* FIXME: all we known is that it has execute PERMISSION, | |
2960 | may be data. */ | |
2961 | newsect->flags |= SEC_CODE; | |
2962 | } | |
2963 | } | |
2964 | if (!(hdr->p_flags & PF_W)) | |
2965 | { | |
2966 | newsect->flags |= SEC_READONLY; | |
2967 | } | |
2968 | } | |
2969 | ||
2970 | if (hdr->p_memsz > hdr->p_filesz) | |
2971 | { | |
2972 | bfd_vma align; | |
2973 | ||
2974 | sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : ""); | |
2975 | len = strlen (namebuf) + 1; | |
2976 | name = (char *) bfd_alloc (abfd, len); | |
2977 | if (!name) | |
2978 | return false; | |
2979 | memcpy (name, namebuf, len); | |
2980 | newsect = bfd_make_section (abfd, name); | |
2981 | if (newsect == NULL) | |
2982 | return false; | |
2983 | newsect->vma = (hdr->p_vaddr + hdr->p_filesz) / opb; | |
2984 | newsect->lma = (hdr->p_paddr + hdr->p_filesz) / opb; | |
2985 | newsect->size = hdr->p_memsz - hdr->p_filesz; | |
2986 | newsect->filepos = hdr->p_offset + hdr->p_filesz; | |
2987 | align = newsect->vma & -newsect->vma; | |
2988 | if (align == 0 || align > hdr->p_align) | |
2989 | align = hdr->p_align; | |
2990 | newsect->alignment_power = bfd_log2 (align); | |
2991 | if (hdr->p_type == PT_LOAD) | |
2992 | { | |
2993 | newsect->flags |= SEC_ALLOC; | |
2994 | if (hdr->p_flags & PF_X) | |
2995 | newsect->flags |= SEC_CODE; | |
2996 | } | |
2997 | if (!(hdr->p_flags & PF_W)) | |
2998 | newsect->flags |= SEC_READONLY; | |
2999 | } | |
3000 | ||
3001 | return true; | |
3002 | } | |
3003 | ||
3004 | static bool | |
3005 | _bfd_elf_core_find_build_id (bfd *templ, bfd_vma offset) | |
3006 | { | |
3007 | /* The return value is ignored. Build-ids are considered optional. */ | |
3008 | if (templ->xvec->flavour == bfd_target_elf_flavour) | |
3009 | return (*get_elf_backend_data (templ)->elf_backend_core_find_build_id) | |
3010 | (templ, offset); | |
3011 | return false; | |
3012 | } | |
3013 | ||
3014 | bool | |
3015 | bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index) | |
3016 | { | |
3017 | const struct elf_backend_data *bed; | |
3018 | ||
3019 | switch (hdr->p_type) | |
3020 | { | |
3021 | case PT_NULL: | |
3022 | return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null"); | |
3023 | ||
3024 | case PT_LOAD: | |
3025 | if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load")) | |
3026 | return false; | |
3027 | if (bfd_get_format (abfd) == bfd_core && abfd->build_id == NULL) | |
3028 | _bfd_elf_core_find_build_id (abfd, hdr->p_offset); | |
3029 | return true; | |
3030 | ||
3031 | case PT_DYNAMIC: | |
3032 | return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic"); | |
3033 | ||
3034 | case PT_INTERP: | |
3035 | return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp"); | |
3036 | ||
3037 | case PT_NOTE: | |
3038 | if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note")) | |
3039 | return false; | |
3040 | if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz, | |
3041 | hdr->p_align)) | |
3042 | return false; | |
3043 | return true; | |
3044 | ||
3045 | case PT_SHLIB: | |
3046 | return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib"); | |
3047 | ||
3048 | case PT_PHDR: | |
3049 | return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr"); | |
3050 | ||
3051 | case PT_GNU_EH_FRAME: | |
3052 | return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, | |
3053 | "eh_frame_hdr"); | |
3054 | ||
3055 | case PT_GNU_STACK: | |
3056 | return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack"); | |
3057 | ||
3058 | case PT_GNU_RELRO: | |
3059 | return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro"); | |
3060 | ||
3061 | default: | |
3062 | /* Check for any processor-specific program segment types. */ | |
3063 | bed = get_elf_backend_data (abfd); | |
3064 | return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc"); | |
3065 | } | |
3066 | } | |
3067 | ||
3068 | /* Return the REL_HDR for SEC, assuming there is only a single one, either | |
3069 | REL or RELA. */ | |
3070 | ||
3071 | Elf_Internal_Shdr * | |
3072 | _bfd_elf_single_rel_hdr (asection *sec) | |
3073 | { | |
3074 | if (elf_section_data (sec)->rel.hdr) | |
3075 | { | |
3076 | BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL); | |
3077 | return elf_section_data (sec)->rel.hdr; | |
3078 | } | |
3079 | else | |
3080 | return elf_section_data (sec)->rela.hdr; | |
3081 | } | |
3082 | ||
3083 | static bool | |
3084 | _bfd_elf_set_reloc_sh_name (bfd *abfd, | |
3085 | Elf_Internal_Shdr *rel_hdr, | |
3086 | const char *sec_name, | |
3087 | bool use_rela_p) | |
3088 | { | |
3089 | char *name = (char *) bfd_alloc (abfd, | |
3090 | sizeof ".rela" + strlen (sec_name)); | |
3091 | if (name == NULL) | |
3092 | return false; | |
3093 | ||
3094 | sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", sec_name); | |
3095 | rel_hdr->sh_name = | |
3096 | (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name, | |
3097 | false); | |
3098 | if (rel_hdr->sh_name == (unsigned int) -1) | |
3099 | return false; | |
3100 | ||
3101 | return true; | |
3102 | } | |
3103 | ||
3104 | /* Allocate and initialize a section-header for a new reloc section, | |
3105 | containing relocations against ASECT. It is stored in RELDATA. If | |
3106 | USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL | |
3107 | relocations. */ | |
3108 | ||
3109 | static bool | |
3110 | _bfd_elf_init_reloc_shdr (bfd *abfd, | |
3111 | struct bfd_elf_section_reloc_data *reldata, | |
3112 | const char *sec_name, | |
3113 | bool use_rela_p, | |
3114 | bool delay_st_name_p) | |
3115 | { | |
3116 | Elf_Internal_Shdr *rel_hdr; | |
3117 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3118 | ||
3119 | BFD_ASSERT (reldata->hdr == NULL); | |
3120 | rel_hdr = bfd_zalloc (abfd, sizeof (*rel_hdr)); | |
3121 | reldata->hdr = rel_hdr; | |
3122 | ||
3123 | if (delay_st_name_p) | |
3124 | rel_hdr->sh_name = (unsigned int) -1; | |
3125 | else if (!_bfd_elf_set_reloc_sh_name (abfd, rel_hdr, sec_name, | |
3126 | use_rela_p)) | |
3127 | return false; | |
3128 | rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
3129 | rel_hdr->sh_entsize = (use_rela_p | |
3130 | ? bed->s->sizeof_rela | |
3131 | : bed->s->sizeof_rel); | |
3132 | rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; | |
3133 | rel_hdr->sh_flags = 0; | |
3134 | rel_hdr->sh_addr = 0; | |
3135 | rel_hdr->sh_size = 0; | |
3136 | rel_hdr->sh_offset = 0; | |
3137 | ||
3138 | return true; | |
3139 | } | |
3140 | ||
3141 | /* Return the default section type based on the passed in section flags. */ | |
3142 | ||
3143 | int | |
3144 | bfd_elf_get_default_section_type (flagword flags) | |
3145 | { | |
3146 | if ((flags & (SEC_ALLOC | SEC_IS_COMMON)) != 0 | |
3147 | && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) | |
3148 | return SHT_NOBITS; | |
3149 | return SHT_PROGBITS; | |
3150 | } | |
3151 | ||
3152 | struct fake_section_arg | |
3153 | { | |
3154 | struct bfd_link_info *link_info; | |
3155 | bool failed; | |
3156 | }; | |
3157 | ||
3158 | /* Set up an ELF internal section header for a section. */ | |
3159 | ||
3160 | static void | |
3161 | elf_fake_sections (bfd *abfd, asection *asect, void *fsarg) | |
3162 | { | |
3163 | struct fake_section_arg *arg = (struct fake_section_arg *)fsarg; | |
3164 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3165 | struct bfd_elf_section_data *esd = elf_section_data (asect); | |
3166 | Elf_Internal_Shdr *this_hdr; | |
3167 | unsigned int sh_type; | |
3168 | const char *name = asect->name; | |
3169 | bool delay_st_name_p = false; | |
3170 | bfd_vma mask; | |
3171 | ||
3172 | if (arg->failed) | |
3173 | { | |
3174 | /* We already failed; just get out of the bfd_map_over_sections | |
3175 | loop. */ | |
3176 | return; | |
3177 | } | |
3178 | ||
3179 | this_hdr = &esd->this_hdr; | |
3180 | ||
3181 | if (arg->link_info) | |
3182 | { | |
3183 | /* ld: compress DWARF debug sections with names: .debug_*. */ | |
3184 | if ((arg->link_info->compress_debug & COMPRESS_DEBUG) | |
3185 | && (asect->flags & SEC_DEBUGGING) | |
3186 | && name[1] == 'd' | |
3187 | && name[6] == '_') | |
3188 | { | |
3189 | /* Set SEC_ELF_COMPRESS to indicate this section should be | |
3190 | compressed. */ | |
3191 | asect->flags |= SEC_ELF_COMPRESS; | |
3192 | /* If this section will be compressed, delay adding section | |
3193 | name to section name section after it is compressed in | |
3194 | _bfd_elf_assign_file_positions_for_non_load. */ | |
3195 | delay_st_name_p = true; | |
3196 | } | |
3197 | } | |
3198 | else if ((asect->flags & SEC_ELF_RENAME)) | |
3199 | { | |
3200 | /* objcopy: rename output DWARF debug section. */ | |
3201 | if ((abfd->flags & (BFD_DECOMPRESS | BFD_COMPRESS_GABI))) | |
3202 | { | |
3203 | /* When we decompress or compress with SHF_COMPRESSED, | |
3204 | convert section name from .zdebug_* to .debug_* if | |
3205 | needed. */ | |
3206 | if (name[1] == 'z') | |
3207 | { | |
3208 | char *new_name = convert_zdebug_to_debug (abfd, name); | |
3209 | if (new_name == NULL) | |
3210 | { | |
3211 | arg->failed = true; | |
3212 | return; | |
3213 | } | |
3214 | name = new_name; | |
3215 | } | |
3216 | } | |
3217 | else if (asect->compress_status == COMPRESS_SECTION_DONE) | |
3218 | { | |
3219 | /* PR binutils/18087: Compression does not always make a | |
3220 | section smaller. So only rename the section when | |
3221 | compression has actually taken place. If input section | |
3222 | name is .zdebug_*, we should never compress it again. */ | |
3223 | char *new_name = convert_debug_to_zdebug (abfd, name); | |
3224 | if (new_name == NULL) | |
3225 | { | |
3226 | arg->failed = true; | |
3227 | return; | |
3228 | } | |
3229 | BFD_ASSERT (name[1] != 'z'); | |
3230 | name = new_name; | |
3231 | } | |
3232 | } | |
3233 | ||
3234 | if (delay_st_name_p) | |
3235 | this_hdr->sh_name = (unsigned int) -1; | |
3236 | else | |
3237 | { | |
3238 | this_hdr->sh_name | |
3239 | = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), | |
3240 | name, false); | |
3241 | if (this_hdr->sh_name == (unsigned int) -1) | |
3242 | { | |
3243 | arg->failed = true; | |
3244 | return; | |
3245 | } | |
3246 | } | |
3247 | ||
3248 | /* Don't clear sh_flags. Assembler may set additional bits. */ | |
3249 | ||
3250 | if ((asect->flags & SEC_ALLOC) != 0 | |
3251 | || asect->user_set_vma) | |
3252 | this_hdr->sh_addr = asect->vma * bfd_octets_per_byte (abfd, asect); | |
3253 | else | |
3254 | this_hdr->sh_addr = 0; | |
3255 | ||
3256 | this_hdr->sh_offset = 0; | |
3257 | this_hdr->sh_size = asect->size; | |
3258 | this_hdr->sh_link = 0; | |
3259 | /* PR 17512: file: 0eb809fe, 8b0535ee. */ | |
3260 | if (asect->alignment_power >= (sizeof (bfd_vma) * 8) - 1) | |
3261 | { | |
3262 | _bfd_error_handler | |
3263 | /* xgettext:c-format */ | |
3264 | (_("%pB: error: alignment power %d of section `%pA' is too big"), | |
3265 | abfd, asect->alignment_power, asect); | |
3266 | arg->failed = true; | |
3267 | return; | |
3268 | } | |
3269 | /* Set sh_addralign to the highest power of two given by alignment | |
3270 | consistent with the section VMA. Linker scripts can force VMA. */ | |
3271 | mask = ((bfd_vma) 1 << asect->alignment_power) | this_hdr->sh_addr; | |
3272 | this_hdr->sh_addralign = mask & -mask; | |
3273 | /* The sh_entsize and sh_info fields may have been set already by | |
3274 | copy_private_section_data. */ | |
3275 | ||
3276 | this_hdr->bfd_section = asect; | |
3277 | this_hdr->contents = NULL; | |
3278 | ||
3279 | /* If the section type is unspecified, we set it based on | |
3280 | asect->flags. */ | |
3281 | if ((asect->flags & SEC_GROUP) != 0) | |
3282 | sh_type = SHT_GROUP; | |
3283 | else | |
3284 | sh_type = bfd_elf_get_default_section_type (asect->flags); | |
3285 | ||
3286 | if (this_hdr->sh_type == SHT_NULL) | |
3287 | this_hdr->sh_type = sh_type; | |
3288 | else if (this_hdr->sh_type == SHT_NOBITS | |
3289 | && sh_type == SHT_PROGBITS | |
3290 | && (asect->flags & SEC_ALLOC) != 0) | |
3291 | { | |
3292 | /* Warn if we are changing a NOBITS section to PROGBITS, but | |
3293 | allow the link to proceed. This can happen when users link | |
3294 | non-bss input sections to bss output sections, or emit data | |
3295 | to a bss output section via a linker script. */ | |
3296 | _bfd_error_handler | |
3297 | (_("warning: section `%pA' type changed to PROGBITS"), asect); | |
3298 | this_hdr->sh_type = sh_type; | |
3299 | } | |
3300 | ||
3301 | switch (this_hdr->sh_type) | |
3302 | { | |
3303 | default: | |
3304 | break; | |
3305 | ||
3306 | case SHT_STRTAB: | |
3307 | case SHT_NOTE: | |
3308 | case SHT_NOBITS: | |
3309 | case SHT_PROGBITS: | |
3310 | break; | |
3311 | ||
3312 | case SHT_INIT_ARRAY: | |
3313 | case SHT_FINI_ARRAY: | |
3314 | case SHT_PREINIT_ARRAY: | |
3315 | this_hdr->sh_entsize = bed->s->arch_size / 8; | |
3316 | break; | |
3317 | ||
3318 | case SHT_HASH: | |
3319 | this_hdr->sh_entsize = bed->s->sizeof_hash_entry; | |
3320 | break; | |
3321 | ||
3322 | case SHT_DYNSYM: | |
3323 | this_hdr->sh_entsize = bed->s->sizeof_sym; | |
3324 | break; | |
3325 | ||
3326 | case SHT_DYNAMIC: | |
3327 | this_hdr->sh_entsize = bed->s->sizeof_dyn; | |
3328 | break; | |
3329 | ||
3330 | case SHT_RELA: | |
3331 | if (get_elf_backend_data (abfd)->may_use_rela_p) | |
3332 | this_hdr->sh_entsize = bed->s->sizeof_rela; | |
3333 | break; | |
3334 | ||
3335 | case SHT_REL: | |
3336 | if (get_elf_backend_data (abfd)->may_use_rel_p) | |
3337 | this_hdr->sh_entsize = bed->s->sizeof_rel; | |
3338 | break; | |
3339 | ||
3340 | case SHT_GNU_versym: | |
3341 | this_hdr->sh_entsize = sizeof (Elf_External_Versym); | |
3342 | break; | |
3343 | ||
3344 | case SHT_GNU_verdef: | |
3345 | this_hdr->sh_entsize = 0; | |
3346 | /* objcopy or strip will copy over sh_info, but may not set | |
3347 | cverdefs. The linker will set cverdefs, but sh_info will be | |
3348 | zero. */ | |
3349 | if (this_hdr->sh_info == 0) | |
3350 | this_hdr->sh_info = elf_tdata (abfd)->cverdefs; | |
3351 | else | |
3352 | BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0 | |
3353 | || this_hdr->sh_info == elf_tdata (abfd)->cverdefs); | |
3354 | break; | |
3355 | ||
3356 | case SHT_GNU_verneed: | |
3357 | this_hdr->sh_entsize = 0; | |
3358 | /* objcopy or strip will copy over sh_info, but may not set | |
3359 | cverrefs. The linker will set cverrefs, but sh_info will be | |
3360 | zero. */ | |
3361 | if (this_hdr->sh_info == 0) | |
3362 | this_hdr->sh_info = elf_tdata (abfd)->cverrefs; | |
3363 | else | |
3364 | BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0 | |
3365 | || this_hdr->sh_info == elf_tdata (abfd)->cverrefs); | |
3366 | break; | |
3367 | ||
3368 | case SHT_GROUP: | |
3369 | this_hdr->sh_entsize = GRP_ENTRY_SIZE; | |
3370 | break; | |
3371 | ||
3372 | case SHT_GNU_HASH: | |
3373 | this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4; | |
3374 | break; | |
3375 | } | |
3376 | ||
3377 | if ((asect->flags & SEC_ALLOC) != 0) | |
3378 | this_hdr->sh_flags |= SHF_ALLOC; | |
3379 | if ((asect->flags & SEC_READONLY) == 0) | |
3380 | this_hdr->sh_flags |= SHF_WRITE; | |
3381 | if ((asect->flags & SEC_CODE) != 0) | |
3382 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
3383 | if ((asect->flags & SEC_MERGE) != 0) | |
3384 | { | |
3385 | this_hdr->sh_flags |= SHF_MERGE; | |
3386 | this_hdr->sh_entsize = asect->entsize; | |
3387 | } | |
3388 | if ((asect->flags & SEC_STRINGS) != 0) | |
3389 | this_hdr->sh_flags |= SHF_STRINGS; | |
3390 | if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL) | |
3391 | this_hdr->sh_flags |= SHF_GROUP; | |
3392 | if ((asect->flags & SEC_THREAD_LOCAL) != 0) | |
3393 | { | |
3394 | this_hdr->sh_flags |= SHF_TLS; | |
3395 | if (asect->size == 0 | |
3396 | && (asect->flags & SEC_HAS_CONTENTS) == 0) | |
3397 | { | |
3398 | struct bfd_link_order *o = asect->map_tail.link_order; | |
3399 | ||
3400 | this_hdr->sh_size = 0; | |
3401 | if (o != NULL) | |
3402 | { | |
3403 | this_hdr->sh_size = o->offset + o->size; | |
3404 | if (this_hdr->sh_size != 0) | |
3405 | this_hdr->sh_type = SHT_NOBITS; | |
3406 | } | |
3407 | } | |
3408 | } | |
3409 | if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE) | |
3410 | this_hdr->sh_flags |= SHF_EXCLUDE; | |
3411 | ||
3412 | /* If the section has relocs, set up a section header for the | |
3413 | SHT_REL[A] section. If two relocation sections are required for | |
3414 | this section, it is up to the processor-specific back-end to | |
3415 | create the other. */ | |
3416 | if ((asect->flags & SEC_RELOC) != 0) | |
3417 | { | |
3418 | /* When doing a relocatable link, create both REL and RELA sections if | |
3419 | needed. */ | |
3420 | if (arg->link_info | |
3421 | /* Do the normal setup if we wouldn't create any sections here. */ | |
3422 | && esd->rel.count + esd->rela.count > 0 | |
3423 | && (bfd_link_relocatable (arg->link_info) | |
3424 | || arg->link_info->emitrelocations)) | |
3425 | { | |
3426 | if (esd->rel.count && esd->rel.hdr == NULL | |
3427 | && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, name, | |
3428 | false, delay_st_name_p)) | |
3429 | { | |
3430 | arg->failed = true; | |
3431 | return; | |
3432 | } | |
3433 | if (esd->rela.count && esd->rela.hdr == NULL | |
3434 | && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, name, | |
3435 | true, delay_st_name_p)) | |
3436 | { | |
3437 | arg->failed = true; | |
3438 | return; | |
3439 | } | |
3440 | } | |
3441 | else if (!_bfd_elf_init_reloc_shdr (abfd, | |
3442 | (asect->use_rela_p | |
3443 | ? &esd->rela : &esd->rel), | |
3444 | name, | |
3445 | asect->use_rela_p, | |
3446 | delay_st_name_p)) | |
3447 | { | |
3448 | arg->failed = true; | |
3449 | return; | |
3450 | } | |
3451 | } | |
3452 | ||
3453 | /* Check for processor-specific section types. */ | |
3454 | sh_type = this_hdr->sh_type; | |
3455 | if (bed->elf_backend_fake_sections | |
3456 | && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect)) | |
3457 | { | |
3458 | arg->failed = true; | |
3459 | return; | |
3460 | } | |
3461 | ||
3462 | if (sh_type == SHT_NOBITS && asect->size != 0) | |
3463 | { | |
3464 | /* Don't change the header type from NOBITS if we are being | |
3465 | called for objcopy --only-keep-debug. */ | |
3466 | this_hdr->sh_type = sh_type; | |
3467 | } | |
3468 | } | |
3469 | ||
3470 | /* Fill in the contents of a SHT_GROUP section. Called from | |
3471 | _bfd_elf_compute_section_file_positions for gas, objcopy, and | |
3472 | when ELF targets use the generic linker, ld. Called for ld -r | |
3473 | from bfd_elf_final_link. */ | |
3474 | ||
3475 | void | |
3476 | bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg) | |
3477 | { | |
3478 | bool *failedptr = (bool *) failedptrarg; | |
3479 | asection *elt, *first; | |
3480 | unsigned char *loc; | |
3481 | bool gas; | |
3482 | ||
3483 | /* Ignore linker created group section. See elfNN_ia64_object_p in | |
3484 | elfxx-ia64.c. */ | |
3485 | if ((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP | |
3486 | || sec->size == 0 | |
3487 | || *failedptr) | |
3488 | return; | |
3489 | ||
3490 | if (elf_section_data (sec)->this_hdr.sh_info == 0) | |
3491 | { | |
3492 | unsigned long symindx = 0; | |
3493 | ||
3494 | /* elf_group_id will have been set up by objcopy and the | |
3495 | generic linker. */ | |
3496 | if (elf_group_id (sec) != NULL) | |
3497 | symindx = elf_group_id (sec)->udata.i; | |
3498 | ||
3499 | if (symindx == 0) | |
3500 | { | |
3501 | /* If called from the assembler, swap_out_syms will have set up | |
3502 | elf_section_syms. | |
3503 | PR 25699: A corrupt input file could contain bogus group info. */ | |
3504 | if (sec->index >= elf_num_section_syms (abfd) | |
3505 | || elf_section_syms (abfd)[sec->index] == NULL) | |
3506 | { | |
3507 | *failedptr = true; | |
3508 | return; | |
3509 | } | |
3510 | symindx = elf_section_syms (abfd)[sec->index]->udata.i; | |
3511 | } | |
3512 | elf_section_data (sec)->this_hdr.sh_info = symindx; | |
3513 | } | |
3514 | else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2) | |
3515 | { | |
3516 | /* The ELF backend linker sets sh_info to -2 when the group | |
3517 | signature symbol is global, and thus the index can't be | |
3518 | set until all local symbols are output. */ | |
3519 | asection *igroup; | |
3520 | struct bfd_elf_section_data *sec_data; | |
3521 | unsigned long symndx; | |
3522 | unsigned long extsymoff; | |
3523 | struct elf_link_hash_entry *h; | |
3524 | ||
3525 | /* The point of this little dance to the first SHF_GROUP section | |
3526 | then back to the SHT_GROUP section is that this gets us to | |
3527 | the SHT_GROUP in the input object. */ | |
3528 | igroup = elf_sec_group (elf_next_in_group (sec)); | |
3529 | sec_data = elf_section_data (igroup); | |
3530 | symndx = sec_data->this_hdr.sh_info; | |
3531 | extsymoff = 0; | |
3532 | if (!elf_bad_symtab (igroup->owner)) | |
3533 | { | |
3534 | Elf_Internal_Shdr *symtab_hdr; | |
3535 | ||
3536 | symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr; | |
3537 | extsymoff = symtab_hdr->sh_info; | |
3538 | } | |
3539 | h = elf_sym_hashes (igroup->owner)[symndx - extsymoff]; | |
3540 | while (h->root.type == bfd_link_hash_indirect | |
3541 | || h->root.type == bfd_link_hash_warning) | |
3542 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3543 | ||
3544 | elf_section_data (sec)->this_hdr.sh_info = h->indx; | |
3545 | } | |
3546 | ||
3547 | /* The contents won't be allocated for "ld -r" or objcopy. */ | |
3548 | gas = true; | |
3549 | if (sec->contents == NULL) | |
3550 | { | |
3551 | gas = false; | |
3552 | sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size); | |
3553 | ||
3554 | /* Arrange for the section to be written out. */ | |
3555 | elf_section_data (sec)->this_hdr.contents = sec->contents; | |
3556 | if (sec->contents == NULL) | |
3557 | { | |
3558 | *failedptr = true; | |
3559 | return; | |
3560 | } | |
3561 | } | |
3562 | ||
3563 | loc = sec->contents + sec->size; | |
3564 | ||
3565 | /* Get the pointer to the first section in the group that gas | |
3566 | squirreled away here. objcopy arranges for this to be set to the | |
3567 | start of the input section group. */ | |
3568 | first = elt = elf_next_in_group (sec); | |
3569 | ||
3570 | /* First element is a flag word. Rest of section is elf section | |
3571 | indices for all the sections of the group. Write them backwards | |
3572 | just to keep the group in the same order as given in .section | |
3573 | directives, not that it matters. */ | |
3574 | while (elt != NULL) | |
3575 | { | |
3576 | asection *s; | |
3577 | ||
3578 | s = elt; | |
3579 | if (!gas) | |
3580 | s = s->output_section; | |
3581 | if (s != NULL | |
3582 | && !bfd_is_abs_section (s)) | |
3583 | { | |
3584 | struct bfd_elf_section_data *elf_sec = elf_section_data (s); | |
3585 | struct bfd_elf_section_data *input_elf_sec = elf_section_data (elt); | |
3586 | ||
3587 | if (elf_sec->rel.hdr != NULL | |
3588 | && (gas | |
3589 | || (input_elf_sec->rel.hdr != NULL | |
3590 | && input_elf_sec->rel.hdr->sh_flags & SHF_GROUP) != 0)) | |
3591 | { | |
3592 | elf_sec->rel.hdr->sh_flags |= SHF_GROUP; | |
3593 | loc -= 4; | |
3594 | H_PUT_32 (abfd, elf_sec->rel.idx, loc); | |
3595 | } | |
3596 | if (elf_sec->rela.hdr != NULL | |
3597 | && (gas | |
3598 | || (input_elf_sec->rela.hdr != NULL | |
3599 | && input_elf_sec->rela.hdr->sh_flags & SHF_GROUP) != 0)) | |
3600 | { | |
3601 | elf_sec->rela.hdr->sh_flags |= SHF_GROUP; | |
3602 | loc -= 4; | |
3603 | H_PUT_32 (abfd, elf_sec->rela.idx, loc); | |
3604 | } | |
3605 | loc -= 4; | |
3606 | H_PUT_32 (abfd, elf_sec->this_idx, loc); | |
3607 | } | |
3608 | elt = elf_next_in_group (elt); | |
3609 | if (elt == first) | |
3610 | break; | |
3611 | } | |
3612 | ||
3613 | loc -= 4; | |
3614 | BFD_ASSERT (loc == sec->contents); | |
3615 | ||
3616 | H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc); | |
3617 | } | |
3618 | ||
3619 | /* Given NAME, the name of a relocation section stripped of its | |
3620 | .rel/.rela prefix, return the section in ABFD to which the | |
3621 | relocations apply. */ | |
3622 | ||
3623 | asection * | |
3624 | _bfd_elf_plt_get_reloc_section (bfd *abfd, const char *name) | |
3625 | { | |
3626 | /* If a target needs .got.plt section, relocations in rela.plt/rel.plt | |
3627 | section likely apply to .got.plt or .got section. */ | |
3628 | if (get_elf_backend_data (abfd)->want_got_plt | |
3629 | && strcmp (name, ".plt") == 0) | |
3630 | { | |
3631 | asection *sec; | |
3632 | ||
3633 | name = ".got.plt"; | |
3634 | sec = bfd_get_section_by_name (abfd, name); | |
3635 | if (sec != NULL) | |
3636 | return sec; | |
3637 | name = ".got"; | |
3638 | } | |
3639 | ||
3640 | return bfd_get_section_by_name (abfd, name); | |
3641 | } | |
3642 | ||
3643 | /* Return the section to which RELOC_SEC applies. */ | |
3644 | ||
3645 | static asection * | |
3646 | elf_get_reloc_section (asection *reloc_sec) | |
3647 | { | |
3648 | const char *name; | |
3649 | unsigned int type; | |
3650 | bfd *abfd; | |
3651 | const struct elf_backend_data *bed; | |
3652 | ||
3653 | type = elf_section_data (reloc_sec)->this_hdr.sh_type; | |
3654 | if (type != SHT_REL && type != SHT_RELA) | |
3655 | return NULL; | |
3656 | ||
3657 | /* We look up the section the relocs apply to by name. */ | |
3658 | name = reloc_sec->name; | |
3659 | if (!startswith (name, ".rel")) | |
3660 | return NULL; | |
3661 | name += 4; | |
3662 | if (type == SHT_RELA && *name++ != 'a') | |
3663 | return NULL; | |
3664 | ||
3665 | abfd = reloc_sec->owner; | |
3666 | bed = get_elf_backend_data (abfd); | |
3667 | return bed->get_reloc_section (abfd, name); | |
3668 | } | |
3669 | ||
3670 | /* Assign all ELF section numbers. The dummy first section is handled here | |
3671 | too. The link/info pointers for the standard section types are filled | |
3672 | in here too, while we're at it. LINK_INFO will be 0 when arriving | |
3673 | here for objcopy, and when using the generic ELF linker. */ | |
3674 | ||
3675 | static bool | |
3676 | assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info) | |
3677 | { | |
3678 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
3679 | asection *sec; | |
3680 | unsigned int section_number; | |
3681 | Elf_Internal_Shdr **i_shdrp; | |
3682 | struct bfd_elf_section_data *d; | |
3683 | bool need_symtab; | |
3684 | size_t amt; | |
3685 | ||
3686 | section_number = 1; | |
3687 | ||
3688 | _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd)); | |
3689 | ||
3690 | /* SHT_GROUP sections are in relocatable files only. */ | |
3691 | if (link_info == NULL || !link_info->resolve_section_groups) | |
3692 | { | |
3693 | size_t reloc_count = 0; | |
3694 | ||
3695 | /* Put SHT_GROUP sections first. */ | |
3696 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
3697 | { | |
3698 | d = elf_section_data (sec); | |
3699 | ||
3700 | if (d->this_hdr.sh_type == SHT_GROUP) | |
3701 | { | |
3702 | if (sec->flags & SEC_LINKER_CREATED) | |
3703 | { | |
3704 | /* Remove the linker created SHT_GROUP sections. */ | |
3705 | bfd_section_list_remove (abfd, sec); | |
3706 | abfd->section_count--; | |
3707 | } | |
3708 | else | |
3709 | d->this_idx = section_number++; | |
3710 | } | |
3711 | ||
3712 | /* Count relocations. */ | |
3713 | reloc_count += sec->reloc_count; | |
3714 | } | |
3715 | ||
3716 | /* Clear HAS_RELOC if there are no relocations. */ | |
3717 | if (reloc_count == 0) | |
3718 | abfd->flags &= ~HAS_RELOC; | |
3719 | } | |
3720 | ||
3721 | for (sec = abfd->sections; sec; sec = sec->next) | |
3722 | { | |
3723 | d = elf_section_data (sec); | |
3724 | ||
3725 | if (d->this_hdr.sh_type != SHT_GROUP) | |
3726 | d->this_idx = section_number++; | |
3727 | if (d->this_hdr.sh_name != (unsigned int) -1) | |
3728 | _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name); | |
3729 | if (d->rel.hdr) | |
3730 | { | |
3731 | d->rel.idx = section_number++; | |
3732 | if (d->rel.hdr->sh_name != (unsigned int) -1) | |
3733 | _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name); | |
3734 | } | |
3735 | else | |
3736 | d->rel.idx = 0; | |
3737 | ||
3738 | if (d->rela.hdr) | |
3739 | { | |
3740 | d->rela.idx = section_number++; | |
3741 | if (d->rela.hdr->sh_name != (unsigned int) -1) | |
3742 | _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name); | |
3743 | } | |
3744 | else | |
3745 | d->rela.idx = 0; | |
3746 | } | |
3747 | ||
3748 | need_symtab = (bfd_get_symcount (abfd) > 0 | |
3749 | || (link_info == NULL | |
3750 | && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC)) | |
3751 | == HAS_RELOC))); | |
3752 | if (need_symtab) | |
3753 | { | |
3754 | elf_onesymtab (abfd) = section_number++; | |
3755 | _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name); | |
3756 | if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF)) | |
3757 | { | |
3758 | elf_section_list *entry; | |
3759 | ||
3760 | BFD_ASSERT (elf_symtab_shndx_list (abfd) == NULL); | |
3761 | ||
3762 | entry = bfd_zalloc (abfd, sizeof (*entry)); | |
3763 | entry->ndx = section_number++; | |
3764 | elf_symtab_shndx_list (abfd) = entry; | |
3765 | entry->hdr.sh_name | |
3766 | = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), | |
3767 | ".symtab_shndx", false); | |
3768 | if (entry->hdr.sh_name == (unsigned int) -1) | |
3769 | return false; | |
3770 | } | |
3771 | elf_strtab_sec (abfd) = section_number++; | |
3772 | _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name); | |
3773 | } | |
3774 | ||
3775 | elf_shstrtab_sec (abfd) = section_number++; | |
3776 | _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name); | |
3777 | elf_elfheader (abfd)->e_shstrndx = elf_shstrtab_sec (abfd); | |
3778 | ||
3779 | if (section_number >= SHN_LORESERVE) | |
3780 | { | |
3781 | /* xgettext:c-format */ | |
3782 | _bfd_error_handler (_("%pB: too many sections: %u"), | |
3783 | abfd, section_number); | |
3784 | return false; | |
3785 | } | |
3786 | ||
3787 | elf_numsections (abfd) = section_number; | |
3788 | elf_elfheader (abfd)->e_shnum = section_number; | |
3789 | ||
3790 | /* Set up the list of section header pointers, in agreement with the | |
3791 | indices. */ | |
3792 | amt = section_number * sizeof (Elf_Internal_Shdr *); | |
3793 | i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc (abfd, amt); | |
3794 | if (i_shdrp == NULL) | |
3795 | return false; | |
3796 | ||
3797 | i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd, | |
3798 | sizeof (Elf_Internal_Shdr)); | |
3799 | if (i_shdrp[0] == NULL) | |
3800 | { | |
3801 | bfd_release (abfd, i_shdrp); | |
3802 | return false; | |
3803 | } | |
3804 | ||
3805 | elf_elfsections (abfd) = i_shdrp; | |
3806 | ||
3807 | i_shdrp[elf_shstrtab_sec (abfd)] = &t->shstrtab_hdr; | |
3808 | if (need_symtab) | |
3809 | { | |
3810 | i_shdrp[elf_onesymtab (abfd)] = &t->symtab_hdr; | |
3811 | if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF)) | |
3812 | { | |
3813 | elf_section_list * entry = elf_symtab_shndx_list (abfd); | |
3814 | BFD_ASSERT (entry != NULL); | |
3815 | i_shdrp[entry->ndx] = & entry->hdr; | |
3816 | entry->hdr.sh_link = elf_onesymtab (abfd); | |
3817 | } | |
3818 | i_shdrp[elf_strtab_sec (abfd)] = &t->strtab_hdr; | |
3819 | t->symtab_hdr.sh_link = elf_strtab_sec (abfd); | |
3820 | } | |
3821 | ||
3822 | for (sec = abfd->sections; sec; sec = sec->next) | |
3823 | { | |
3824 | asection *s; | |
3825 | ||
3826 | d = elf_section_data (sec); | |
3827 | ||
3828 | i_shdrp[d->this_idx] = &d->this_hdr; | |
3829 | if (d->rel.idx != 0) | |
3830 | i_shdrp[d->rel.idx] = d->rel.hdr; | |
3831 | if (d->rela.idx != 0) | |
3832 | i_shdrp[d->rela.idx] = d->rela.hdr; | |
3833 | ||
3834 | /* Fill in the sh_link and sh_info fields while we're at it. */ | |
3835 | ||
3836 | /* sh_link of a reloc section is the section index of the symbol | |
3837 | table. sh_info is the section index of the section to which | |
3838 | the relocation entries apply. */ | |
3839 | if (d->rel.idx != 0) | |
3840 | { | |
3841 | d->rel.hdr->sh_link = elf_onesymtab (abfd); | |
3842 | d->rel.hdr->sh_info = d->this_idx; | |
3843 | d->rel.hdr->sh_flags |= SHF_INFO_LINK; | |
3844 | } | |
3845 | if (d->rela.idx != 0) | |
3846 | { | |
3847 | d->rela.hdr->sh_link = elf_onesymtab (abfd); | |
3848 | d->rela.hdr->sh_info = d->this_idx; | |
3849 | d->rela.hdr->sh_flags |= SHF_INFO_LINK; | |
3850 | } | |
3851 | ||
3852 | /* We need to set up sh_link for SHF_LINK_ORDER. */ | |
3853 | if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0) | |
3854 | { | |
3855 | s = elf_linked_to_section (sec); | |
3856 | /* We can now have a NULL linked section pointer. | |
3857 | This happens when the sh_link field is 0, which is done | |
3858 | when a linked to section is discarded but the linking | |
3859 | section has been retained for some reason. */ | |
3860 | if (s) | |
3861 | { | |
3862 | /* Check discarded linkonce section. */ | |
3863 | if (discarded_section (s)) | |
3864 | { | |
3865 | asection *kept; | |
3866 | _bfd_error_handler | |
3867 | /* xgettext:c-format */ | |
3868 | (_("%pB: sh_link of section `%pA' points to" | |
3869 | " discarded section `%pA' of `%pB'"), | |
3870 | abfd, d->this_hdr.bfd_section, s, s->owner); | |
3871 | /* Point to the kept section if it has the same | |
3872 | size as the discarded one. */ | |
3873 | kept = _bfd_elf_check_kept_section (s, link_info); | |
3874 | if (kept == NULL) | |
3875 | { | |
3876 | bfd_set_error (bfd_error_bad_value); | |
3877 | return false; | |
3878 | } | |
3879 | s = kept; | |
3880 | } | |
3881 | /* Handle objcopy. */ | |
3882 | else if (s->output_section == NULL) | |
3883 | { | |
3884 | _bfd_error_handler | |
3885 | /* xgettext:c-format */ | |
3886 | (_("%pB: sh_link of section `%pA' points to" | |
3887 | " removed section `%pA' of `%pB'"), | |
3888 | abfd, d->this_hdr.bfd_section, s, s->owner); | |
3889 | bfd_set_error (bfd_error_bad_value); | |
3890 | return false; | |
3891 | } | |
3892 | s = s->output_section; | |
3893 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
3894 | } | |
3895 | } | |
3896 | ||
3897 | switch (d->this_hdr.sh_type) | |
3898 | { | |
3899 | case SHT_REL: | |
3900 | case SHT_RELA: | |
3901 | /* A reloc section which we are treating as a normal BFD | |
3902 | section. sh_link is the section index of the symbol | |
3903 | table. sh_info is the section index of the section to | |
3904 | which the relocation entries apply. We assume that an | |
3905 | allocated reloc section uses the dynamic symbol table | |
3906 | if there is one. Otherwise we guess the normal symbol | |
3907 | table. FIXME: How can we be sure? */ | |
3908 | if (d->this_hdr.sh_link == 0 && (sec->flags & SEC_ALLOC) != 0) | |
3909 | { | |
3910 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
3911 | if (s != NULL) | |
3912 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
3913 | } | |
3914 | if (d->this_hdr.sh_link == 0) | |
3915 | d->this_hdr.sh_link = elf_onesymtab (abfd); | |
3916 | ||
3917 | s = elf_get_reloc_section (sec); | |
3918 | if (s != NULL) | |
3919 | { | |
3920 | d->this_hdr.sh_info = elf_section_data (s)->this_idx; | |
3921 | d->this_hdr.sh_flags |= SHF_INFO_LINK; | |
3922 | } | |
3923 | break; | |
3924 | ||
3925 | case SHT_STRTAB: | |
3926 | /* We assume that a section named .stab*str is a stabs | |
3927 | string section. We look for a section with the same name | |
3928 | but without the trailing ``str'', and set its sh_link | |
3929 | field to point to this section. */ | |
3930 | if (startswith (sec->name, ".stab") | |
3931 | && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) | |
3932 | { | |
3933 | size_t len; | |
3934 | char *alc; | |
3935 | ||
3936 | len = strlen (sec->name); | |
3937 | alc = (char *) bfd_malloc (len - 2); | |
3938 | if (alc == NULL) | |
3939 | return false; | |
3940 | memcpy (alc, sec->name, len - 3); | |
3941 | alc[len - 3] = '\0'; | |
3942 | s = bfd_get_section_by_name (abfd, alc); | |
3943 | free (alc); | |
3944 | if (s != NULL) | |
3945 | { | |
3946 | elf_section_data (s)->this_hdr.sh_link = d->this_idx; | |
3947 | ||
3948 | /* This is a .stab section. */ | |
3949 | elf_section_data (s)->this_hdr.sh_entsize = 12; | |
3950 | } | |
3951 | } | |
3952 | break; | |
3953 | ||
3954 | case SHT_DYNAMIC: | |
3955 | case SHT_DYNSYM: | |
3956 | case SHT_GNU_verneed: | |
3957 | case SHT_GNU_verdef: | |
3958 | /* sh_link is the section header index of the string table | |
3959 | used for the dynamic entries, or the symbol table, or the | |
3960 | version strings. */ | |
3961 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
3962 | if (s != NULL) | |
3963 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
3964 | break; | |
3965 | ||
3966 | case SHT_GNU_LIBLIST: | |
3967 | /* sh_link is the section header index of the prelink library | |
3968 | list used for the dynamic entries, or the symbol table, or | |
3969 | the version strings. */ | |
3970 | s = bfd_get_section_by_name (abfd, ((sec->flags & SEC_ALLOC) | |
3971 | ? ".dynstr" : ".gnu.libstr")); | |
3972 | if (s != NULL) | |
3973 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
3974 | break; | |
3975 | ||
3976 | case SHT_HASH: | |
3977 | case SHT_GNU_HASH: | |
3978 | case SHT_GNU_versym: | |
3979 | /* sh_link is the section header index of the symbol table | |
3980 | this hash table or version table is for. */ | |
3981 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
3982 | if (s != NULL) | |
3983 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
3984 | break; | |
3985 | ||
3986 | case SHT_GROUP: | |
3987 | d->this_hdr.sh_link = elf_onesymtab (abfd); | |
3988 | } | |
3989 | } | |
3990 | ||
3991 | /* Delay setting sh_name to _bfd_elf_write_object_contents so that | |
3992 | _bfd_elf_assign_file_positions_for_non_load can convert DWARF | |
3993 | debug section name from .debug_* to .zdebug_* if needed. */ | |
3994 | ||
3995 | return true; | |
3996 | } | |
3997 | ||
3998 | static bool | |
3999 | sym_is_global (bfd *abfd, asymbol *sym) | |
4000 | { | |
4001 | /* If the backend has a special mapping, use it. */ | |
4002 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4003 | if (bed->elf_backend_sym_is_global) | |
4004 | return (*bed->elf_backend_sym_is_global) (abfd, sym); | |
4005 | ||
4006 | return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0 | |
4007 | || bfd_is_und_section (bfd_asymbol_section (sym)) | |
4008 | || bfd_is_com_section (bfd_asymbol_section (sym))); | |
4009 | } | |
4010 | ||
4011 | /* Filter global symbols of ABFD to include in the import library. All | |
4012 | SYMCOUNT symbols of ABFD can be examined from their pointers in | |
4013 | SYMS. Pointers of symbols to keep should be stored contiguously at | |
4014 | the beginning of that array. | |
4015 | ||
4016 | Returns the number of symbols to keep. */ | |
4017 | ||
4018 | unsigned int | |
4019 | _bfd_elf_filter_global_symbols (bfd *abfd, struct bfd_link_info *info, | |
4020 | asymbol **syms, long symcount) | |
4021 | { | |
4022 | long src_count, dst_count = 0; | |
4023 | ||
4024 | for (src_count = 0; src_count < symcount; src_count++) | |
4025 | { | |
4026 | asymbol *sym = syms[src_count]; | |
4027 | char *name = (char *) bfd_asymbol_name (sym); | |
4028 | struct bfd_link_hash_entry *h; | |
4029 | ||
4030 | if (!sym_is_global (abfd, sym)) | |
4031 | continue; | |
4032 | ||
4033 | h = bfd_link_hash_lookup (info->hash, name, false, false, false); | |
4034 | if (h == NULL) | |
4035 | continue; | |
4036 | if (h->type != bfd_link_hash_defined && h->type != bfd_link_hash_defweak) | |
4037 | continue; | |
4038 | if (h->linker_def || h->ldscript_def) | |
4039 | continue; | |
4040 | ||
4041 | syms[dst_count++] = sym; | |
4042 | } | |
4043 | ||
4044 | syms[dst_count] = NULL; | |
4045 | ||
4046 | return dst_count; | |
4047 | } | |
4048 | ||
4049 | /* Don't output section symbols for sections that are not going to be | |
4050 | output, that are duplicates or there is no BFD section. */ | |
4051 | ||
4052 | static bool | |
4053 | ignore_section_sym (bfd *abfd, asymbol *sym) | |
4054 | { | |
4055 | elf_symbol_type *type_ptr; | |
4056 | ||
4057 | if (sym == NULL) | |
4058 | return false; | |
4059 | ||
4060 | if ((sym->flags & BSF_SECTION_SYM) == 0) | |
4061 | return false; | |
4062 | ||
4063 | /* Ignore the section symbol if it isn't used. */ | |
4064 | if ((sym->flags & BSF_SECTION_SYM_USED) == 0) | |
4065 | return true; | |
4066 | ||
4067 | if (sym->section == NULL) | |
4068 | return true; | |
4069 | ||
4070 | type_ptr = elf_symbol_from (sym); | |
4071 | return ((type_ptr != NULL | |
4072 | && type_ptr->internal_elf_sym.st_shndx != 0 | |
4073 | && bfd_is_abs_section (sym->section)) | |
4074 | || !(sym->section->owner == abfd | |
4075 | || (sym->section->output_section != NULL | |
4076 | && sym->section->output_section->owner == abfd | |
4077 | && sym->section->output_offset == 0) | |
4078 | || bfd_is_abs_section (sym->section))); | |
4079 | } | |
4080 | ||
4081 | /* Map symbol from it's internal number to the external number, moving | |
4082 | all local symbols to be at the head of the list. */ | |
4083 | ||
4084 | static bool | |
4085 | elf_map_symbols (bfd *abfd, unsigned int *pnum_locals) | |
4086 | { | |
4087 | unsigned int symcount = bfd_get_symcount (abfd); | |
4088 | asymbol **syms = bfd_get_outsymbols (abfd); | |
4089 | asymbol **sect_syms; | |
4090 | unsigned int num_locals = 0; | |
4091 | unsigned int num_globals = 0; | |
4092 | unsigned int num_locals2 = 0; | |
4093 | unsigned int num_globals2 = 0; | |
4094 | unsigned int max_index = 0; | |
4095 | unsigned int idx; | |
4096 | asection *asect; | |
4097 | asymbol **new_syms; | |
4098 | size_t amt; | |
4099 | ||
4100 | #ifdef DEBUG | |
4101 | fprintf (stderr, "elf_map_symbols\n"); | |
4102 | fflush (stderr); | |
4103 | #endif | |
4104 | ||
4105 | for (asect = abfd->sections; asect; asect = asect->next) | |
4106 | { | |
4107 | if (max_index < asect->index) | |
4108 | max_index = asect->index; | |
4109 | } | |
4110 | ||
4111 | max_index++; | |
4112 | amt = max_index * sizeof (asymbol *); | |
4113 | sect_syms = (asymbol **) bfd_zalloc (abfd, amt); | |
4114 | if (sect_syms == NULL) | |
4115 | return false; | |
4116 | elf_section_syms (abfd) = sect_syms; | |
4117 | elf_num_section_syms (abfd) = max_index; | |
4118 | ||
4119 | /* Init sect_syms entries for any section symbols we have already | |
4120 | decided to output. */ | |
4121 | for (idx = 0; idx < symcount; idx++) | |
4122 | { | |
4123 | asymbol *sym = syms[idx]; | |
4124 | ||
4125 | if ((sym->flags & BSF_SECTION_SYM) != 0 | |
4126 | && sym->value == 0 | |
4127 | && !ignore_section_sym (abfd, sym) | |
4128 | && !bfd_is_abs_section (sym->section)) | |
4129 | { | |
4130 | asection *sec = sym->section; | |
4131 | ||
4132 | if (sec->owner != abfd) | |
4133 | sec = sec->output_section; | |
4134 | ||
4135 | sect_syms[sec->index] = syms[idx]; | |
4136 | } | |
4137 | } | |
4138 | ||
4139 | /* Classify all of the symbols. */ | |
4140 | for (idx = 0; idx < symcount; idx++) | |
4141 | { | |
4142 | if (sym_is_global (abfd, syms[idx])) | |
4143 | num_globals++; | |
4144 | else if (!ignore_section_sym (abfd, syms[idx])) | |
4145 | num_locals++; | |
4146 | } | |
4147 | ||
4148 | /* We will be adding a section symbol for each normal BFD section. Most | |
4149 | sections will already have a section symbol in outsymbols, but | |
4150 | eg. SHT_GROUP sections will not, and we need the section symbol mapped | |
4151 | at least in that case. */ | |
4152 | for (asect = abfd->sections; asect; asect = asect->next) | |
4153 | { | |
4154 | asymbol *sym = asect->symbol; | |
4155 | /* Don't include ignored section symbols. */ | |
4156 | if (!ignore_section_sym (abfd, sym) | |
4157 | && sect_syms[asect->index] == NULL) | |
4158 | { | |
4159 | if (!sym_is_global (abfd, asect->symbol)) | |
4160 | num_locals++; | |
4161 | else | |
4162 | num_globals++; | |
4163 | } | |
4164 | } | |
4165 | ||
4166 | /* Now sort the symbols so the local symbols are first. */ | |
4167 | amt = (num_locals + num_globals) * sizeof (asymbol *); | |
4168 | new_syms = (asymbol **) bfd_alloc (abfd, amt); | |
4169 | if (new_syms == NULL) | |
4170 | return false; | |
4171 | ||
4172 | for (idx = 0; idx < symcount; idx++) | |
4173 | { | |
4174 | asymbol *sym = syms[idx]; | |
4175 | unsigned int i; | |
4176 | ||
4177 | if (sym_is_global (abfd, sym)) | |
4178 | i = num_locals + num_globals2++; | |
4179 | /* Don't include ignored section symbols. */ | |
4180 | else if (!ignore_section_sym (abfd, sym)) | |
4181 | i = num_locals2++; | |
4182 | else | |
4183 | continue; | |
4184 | new_syms[i] = sym; | |
4185 | sym->udata.i = i + 1; | |
4186 | } | |
4187 | for (asect = abfd->sections; asect; asect = asect->next) | |
4188 | { | |
4189 | asymbol *sym = asect->symbol; | |
4190 | if (!ignore_section_sym (abfd, sym) | |
4191 | && sect_syms[asect->index] == NULL) | |
4192 | { | |
4193 | unsigned int i; | |
4194 | ||
4195 | sect_syms[asect->index] = sym; | |
4196 | if (!sym_is_global (abfd, sym)) | |
4197 | i = num_locals2++; | |
4198 | else | |
4199 | i = num_locals + num_globals2++; | |
4200 | new_syms[i] = sym; | |
4201 | sym->udata.i = i + 1; | |
4202 | } | |
4203 | } | |
4204 | ||
4205 | bfd_set_symtab (abfd, new_syms, num_locals + num_globals); | |
4206 | ||
4207 | *pnum_locals = num_locals; | |
4208 | return true; | |
4209 | } | |
4210 | ||
4211 | /* Align to the maximum file alignment that could be required for any | |
4212 | ELF data structure. */ | |
4213 | ||
4214 | static inline file_ptr | |
4215 | align_file_position (file_ptr off, int align) | |
4216 | { | |
4217 | return (off + align - 1) & ~(align - 1); | |
4218 | } | |
4219 | ||
4220 | /* Assign a file position to a section, optionally aligning to the | |
4221 | required section alignment. */ | |
4222 | ||
4223 | file_ptr | |
4224 | _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp, | |
4225 | file_ptr offset, | |
4226 | bool align) | |
4227 | { | |
4228 | if (align && i_shdrp->sh_addralign > 1) | |
4229 | offset = BFD_ALIGN (offset, i_shdrp->sh_addralign); | |
4230 | i_shdrp->sh_offset = offset; | |
4231 | if (i_shdrp->bfd_section != NULL) | |
4232 | i_shdrp->bfd_section->filepos = offset; | |
4233 | if (i_shdrp->sh_type != SHT_NOBITS) | |
4234 | offset += i_shdrp->sh_size; | |
4235 | return offset; | |
4236 | } | |
4237 | ||
4238 | /* Compute the file positions we are going to put the sections at, and | |
4239 | otherwise prepare to begin writing out the ELF file. If LINK_INFO | |
4240 | is not NULL, this is being called by the ELF backend linker. */ | |
4241 | ||
4242 | bool | |
4243 | _bfd_elf_compute_section_file_positions (bfd *abfd, | |
4244 | struct bfd_link_info *link_info) | |
4245 | { | |
4246 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4247 | struct fake_section_arg fsargs; | |
4248 | bool failed; | |
4249 | struct elf_strtab_hash *strtab = NULL; | |
4250 | Elf_Internal_Shdr *shstrtab_hdr; | |
4251 | bool need_symtab; | |
4252 | ||
4253 | if (abfd->output_has_begun) | |
4254 | return true; | |
4255 | ||
4256 | /* Do any elf backend specific processing first. */ | |
4257 | if (bed->elf_backend_begin_write_processing) | |
4258 | (*bed->elf_backend_begin_write_processing) (abfd, link_info); | |
4259 | ||
4260 | if (!(*bed->elf_backend_init_file_header) (abfd, link_info)) | |
4261 | return false; | |
4262 | ||
4263 | fsargs.failed = false; | |
4264 | fsargs.link_info = link_info; | |
4265 | bfd_map_over_sections (abfd, elf_fake_sections, &fsargs); | |
4266 | if (fsargs.failed) | |
4267 | return false; | |
4268 | ||
4269 | if (!assign_section_numbers (abfd, link_info)) | |
4270 | return false; | |
4271 | ||
4272 | /* The backend linker builds symbol table information itself. */ | |
4273 | need_symtab = (link_info == NULL | |
4274 | && (bfd_get_symcount (abfd) > 0 | |
4275 | || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC)) | |
4276 | == HAS_RELOC))); | |
4277 | if (need_symtab) | |
4278 | { | |
4279 | /* Non-zero if doing a relocatable link. */ | |
4280 | int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC)); | |
4281 | ||
4282 | if (! swap_out_syms (abfd, &strtab, relocatable_p, link_info)) | |
4283 | return false; | |
4284 | } | |
4285 | ||
4286 | failed = false; | |
4287 | if (link_info == NULL) | |
4288 | { | |
4289 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
4290 | if (failed) | |
4291 | return false; | |
4292 | } | |
4293 | ||
4294 | shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; | |
4295 | /* sh_name was set in init_file_header. */ | |
4296 | shstrtab_hdr->sh_type = SHT_STRTAB; | |
4297 | shstrtab_hdr->sh_flags = bed->elf_strtab_flags; | |
4298 | shstrtab_hdr->sh_addr = 0; | |
4299 | /* sh_size is set in _bfd_elf_assign_file_positions_for_non_load. */ | |
4300 | shstrtab_hdr->sh_entsize = 0; | |
4301 | shstrtab_hdr->sh_link = 0; | |
4302 | shstrtab_hdr->sh_info = 0; | |
4303 | /* sh_offset is set in _bfd_elf_assign_file_positions_for_non_load. */ | |
4304 | shstrtab_hdr->sh_addralign = 1; | |
4305 | ||
4306 | if (!assign_file_positions_except_relocs (abfd, link_info)) | |
4307 | return false; | |
4308 | ||
4309 | if (need_symtab) | |
4310 | { | |
4311 | file_ptr off; | |
4312 | Elf_Internal_Shdr *hdr; | |
4313 | ||
4314 | off = elf_next_file_pos (abfd); | |
4315 | ||
4316 | hdr = & elf_symtab_hdr (abfd); | |
4317 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
4318 | ||
4319 | if (elf_symtab_shndx_list (abfd) != NULL) | |
4320 | { | |
4321 | hdr = & elf_symtab_shndx_list (abfd)->hdr; | |
4322 | if (hdr->sh_size != 0) | |
4323 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
4324 | /* FIXME: What about other symtab_shndx sections in the list ? */ | |
4325 | } | |
4326 | ||
4327 | hdr = &elf_tdata (abfd)->strtab_hdr; | |
4328 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
4329 | ||
4330 | elf_next_file_pos (abfd) = off; | |
4331 | ||
4332 | /* Now that we know where the .strtab section goes, write it | |
4333 | out. */ | |
4334 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 | |
4335 | || ! _bfd_elf_strtab_emit (abfd, strtab)) | |
4336 | return false; | |
4337 | _bfd_elf_strtab_free (strtab); | |
4338 | } | |
4339 | ||
4340 | abfd->output_has_begun = true; | |
4341 | ||
4342 | return true; | |
4343 | } | |
4344 | ||
4345 | /* Make an initial estimate of the size of the program header. If we | |
4346 | get the number wrong here, we'll redo section placement. */ | |
4347 | ||
4348 | static bfd_size_type | |
4349 | get_program_header_size (bfd *abfd, struct bfd_link_info *info) | |
4350 | { | |
4351 | size_t segs; | |
4352 | asection *s; | |
4353 | const struct elf_backend_data *bed; | |
4354 | ||
4355 | /* Assume we will need exactly two PT_LOAD segments: one for text | |
4356 | and one for data. */ | |
4357 | segs = 2; | |
4358 | ||
4359 | s = bfd_get_section_by_name (abfd, ".interp"); | |
4360 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->size != 0) | |
4361 | { | |
4362 | /* If we have a loadable interpreter section, we need a | |
4363 | PT_INTERP segment. In this case, assume we also need a | |
4364 | PT_PHDR segment, although that may not be true for all | |
4365 | targets. */ | |
4366 | segs += 2; | |
4367 | } | |
4368 | ||
4369 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) | |
4370 | { | |
4371 | /* We need a PT_DYNAMIC segment. */ | |
4372 | ++segs; | |
4373 | } | |
4374 | ||
4375 | if (info != NULL && info->relro) | |
4376 | { | |
4377 | /* We need a PT_GNU_RELRO segment. */ | |
4378 | ++segs; | |
4379 | } | |
4380 | ||
4381 | if (elf_eh_frame_hdr (abfd)) | |
4382 | { | |
4383 | /* We need a PT_GNU_EH_FRAME segment. */ | |
4384 | ++segs; | |
4385 | } | |
4386 | ||
4387 | if (elf_stack_flags (abfd)) | |
4388 | { | |
4389 | /* We need a PT_GNU_STACK segment. */ | |
4390 | ++segs; | |
4391 | } | |
4392 | ||
4393 | s = bfd_get_section_by_name (abfd, | |
4394 | NOTE_GNU_PROPERTY_SECTION_NAME); | |
4395 | if (s != NULL && s->size != 0) | |
4396 | { | |
4397 | /* We need a PT_GNU_PROPERTY segment. */ | |
4398 | ++segs; | |
4399 | } | |
4400 | ||
4401 | for (s = abfd->sections; s != NULL; s = s->next) | |
4402 | { | |
4403 | if ((s->flags & SEC_LOAD) != 0 | |
4404 | && elf_section_type (s) == SHT_NOTE) | |
4405 | { | |
4406 | unsigned int alignment_power; | |
4407 | /* We need a PT_NOTE segment. */ | |
4408 | ++segs; | |
4409 | /* Try to create just one PT_NOTE segment for all adjacent | |
4410 | loadable SHT_NOTE sections. gABI requires that within a | |
4411 | PT_NOTE segment (and also inside of each SHT_NOTE section) | |
4412 | each note should have the same alignment. So we check | |
4413 | whether the sections are correctly aligned. */ | |
4414 | alignment_power = s->alignment_power; | |
4415 | while (s->next != NULL | |
4416 | && s->next->alignment_power == alignment_power | |
4417 | && (s->next->flags & SEC_LOAD) != 0 | |
4418 | && elf_section_type (s->next) == SHT_NOTE) | |
4419 | s = s->next; | |
4420 | } | |
4421 | } | |
4422 | ||
4423 | for (s = abfd->sections; s != NULL; s = s->next) | |
4424 | { | |
4425 | if (s->flags & SEC_THREAD_LOCAL) | |
4426 | { | |
4427 | /* We need a PT_TLS segment. */ | |
4428 | ++segs; | |
4429 | break; | |
4430 | } | |
4431 | } | |
4432 | ||
4433 | bed = get_elf_backend_data (abfd); | |
4434 | ||
4435 | if ((abfd->flags & D_PAGED) != 0 | |
4436 | && (elf_tdata (abfd)->has_gnu_osabi & elf_gnu_osabi_mbind) != 0) | |
4437 | { | |
4438 | /* Add a PT_GNU_MBIND segment for each mbind section. */ | |
4439 | bfd_vma commonpagesize; | |
4440 | unsigned int page_align_power; | |
4441 | ||
4442 | if (info != NULL) | |
4443 | commonpagesize = info->commonpagesize; | |
4444 | else | |
4445 | commonpagesize = bed->commonpagesize; | |
4446 | page_align_power = bfd_log2 (commonpagesize); | |
4447 | for (s = abfd->sections; s != NULL; s = s->next) | |
4448 | if (elf_section_flags (s) & SHF_GNU_MBIND) | |
4449 | { | |
4450 | if (elf_section_data (s)->this_hdr.sh_info > PT_GNU_MBIND_NUM) | |
4451 | { | |
4452 | _bfd_error_handler | |
4453 | /* xgettext:c-format */ | |
4454 | (_("%pB: GNU_MBIND section `%pA' has invalid " | |
4455 | "sh_info field: %d"), | |
4456 | abfd, s, elf_section_data (s)->this_hdr.sh_info); | |
4457 | continue; | |
4458 | } | |
4459 | /* Align mbind section to page size. */ | |
4460 | if (s->alignment_power < page_align_power) | |
4461 | s->alignment_power = page_align_power; | |
4462 | segs ++; | |
4463 | } | |
4464 | } | |
4465 | ||
4466 | /* Let the backend count up any program headers it might need. */ | |
4467 | if (bed->elf_backend_additional_program_headers) | |
4468 | { | |
4469 | int a; | |
4470 | ||
4471 | a = (*bed->elf_backend_additional_program_headers) (abfd, info); | |
4472 | if (a == -1) | |
4473 | abort (); | |
4474 | segs += a; | |
4475 | } | |
4476 | ||
4477 | return segs * bed->s->sizeof_phdr; | |
4478 | } | |
4479 | ||
4480 | /* Find the segment that contains the output_section of section. */ | |
4481 | ||
4482 | Elf_Internal_Phdr * | |
4483 | _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section) | |
4484 | { | |
4485 | struct elf_segment_map *m; | |
4486 | Elf_Internal_Phdr *p; | |
4487 | ||
4488 | for (m = elf_seg_map (abfd), p = elf_tdata (abfd)->phdr; | |
4489 | m != NULL; | |
4490 | m = m->next, p++) | |
4491 | { | |
4492 | int i; | |
4493 | ||
4494 | for (i = m->count - 1; i >= 0; i--) | |
4495 | if (m->sections[i] == section) | |
4496 | return p; | |
4497 | } | |
4498 | ||
4499 | return NULL; | |
4500 | } | |
4501 | ||
4502 | /* Create a mapping from a set of sections to a program segment. */ | |
4503 | ||
4504 | static struct elf_segment_map * | |
4505 | make_mapping (bfd *abfd, | |
4506 | asection **sections, | |
4507 | unsigned int from, | |
4508 | unsigned int to, | |
4509 | bool phdr) | |
4510 | { | |
4511 | struct elf_segment_map *m; | |
4512 | unsigned int i; | |
4513 | asection **hdrpp; | |
4514 | size_t amt; | |
4515 | ||
4516 | amt = sizeof (struct elf_segment_map) - sizeof (asection *); | |
4517 | amt += (to - from) * sizeof (asection *); | |
4518 | m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
4519 | if (m == NULL) | |
4520 | return NULL; | |
4521 | m->next = NULL; | |
4522 | m->p_type = PT_LOAD; | |
4523 | for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++) | |
4524 | m->sections[i - from] = *hdrpp; | |
4525 | m->count = to - from; | |
4526 | ||
4527 | if (from == 0 && phdr) | |
4528 | { | |
4529 | /* Include the headers in the first PT_LOAD segment. */ | |
4530 | m->includes_filehdr = 1; | |
4531 | m->includes_phdrs = 1; | |
4532 | } | |
4533 | ||
4534 | return m; | |
4535 | } | |
4536 | ||
4537 | /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL | |
4538 | on failure. */ | |
4539 | ||
4540 | struct elf_segment_map * | |
4541 | _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec) | |
4542 | { | |
4543 | struct elf_segment_map *m; | |
4544 | ||
4545 | m = (struct elf_segment_map *) bfd_zalloc (abfd, | |
4546 | sizeof (struct elf_segment_map)); | |
4547 | if (m == NULL) | |
4548 | return NULL; | |
4549 | m->next = NULL; | |
4550 | m->p_type = PT_DYNAMIC; | |
4551 | m->count = 1; | |
4552 | m->sections[0] = dynsec; | |
4553 | ||
4554 | return m; | |
4555 | } | |
4556 | ||
4557 | /* Possibly add or remove segments from the segment map. */ | |
4558 | ||
4559 | static bool | |
4560 | elf_modify_segment_map (bfd *abfd, | |
4561 | struct bfd_link_info *info, | |
4562 | bool remove_empty_load) | |
4563 | { | |
4564 | struct elf_segment_map **m; | |
4565 | const struct elf_backend_data *bed; | |
4566 | ||
4567 | /* The placement algorithm assumes that non allocated sections are | |
4568 | not in PT_LOAD segments. We ensure this here by removing such | |
4569 | sections from the segment map. We also remove excluded | |
4570 | sections. Finally, any PT_LOAD segment without sections is | |
4571 | removed. */ | |
4572 | m = &elf_seg_map (abfd); | |
4573 | while (*m) | |
4574 | { | |
4575 | unsigned int i, new_count; | |
4576 | ||
4577 | for (new_count = 0, i = 0; i < (*m)->count; i++) | |
4578 | { | |
4579 | if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0 | |
4580 | && (((*m)->sections[i]->flags & SEC_ALLOC) != 0 | |
4581 | || (*m)->p_type != PT_LOAD)) | |
4582 | { | |
4583 | (*m)->sections[new_count] = (*m)->sections[i]; | |
4584 | new_count++; | |
4585 | } | |
4586 | } | |
4587 | (*m)->count = new_count; | |
4588 | ||
4589 | if (remove_empty_load | |
4590 | && (*m)->p_type == PT_LOAD | |
4591 | && (*m)->count == 0 | |
4592 | && !(*m)->includes_phdrs) | |
4593 | *m = (*m)->next; | |
4594 | else | |
4595 | m = &(*m)->next; | |
4596 | } | |
4597 | ||
4598 | bed = get_elf_backend_data (abfd); | |
4599 | if (bed->elf_backend_modify_segment_map != NULL) | |
4600 | { | |
4601 | if (!(*bed->elf_backend_modify_segment_map) (abfd, info)) | |
4602 | return false; | |
4603 | } | |
4604 | ||
4605 | return true; | |
4606 | } | |
4607 | ||
4608 | #define IS_TBSS(s) \ | |
4609 | ((s->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) == SEC_THREAD_LOCAL) | |
4610 | ||
4611 | /* Set up a mapping from BFD sections to program segments. */ | |
4612 | ||
4613 | bool | |
4614 | _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info) | |
4615 | { | |
4616 | unsigned int count; | |
4617 | struct elf_segment_map *m; | |
4618 | asection **sections = NULL; | |
4619 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4620 | bool no_user_phdrs; | |
4621 | ||
4622 | no_user_phdrs = elf_seg_map (abfd) == NULL; | |
4623 | ||
4624 | if (info != NULL) | |
4625 | info->user_phdrs = !no_user_phdrs; | |
4626 | ||
4627 | if (no_user_phdrs && bfd_count_sections (abfd) != 0) | |
4628 | { | |
4629 | asection *s; | |
4630 | unsigned int i; | |
4631 | struct elf_segment_map *mfirst; | |
4632 | struct elf_segment_map **pm; | |
4633 | asection *last_hdr; | |
4634 | bfd_vma last_size; | |
4635 | unsigned int hdr_index; | |
4636 | bfd_vma maxpagesize; | |
4637 | asection **hdrpp; | |
4638 | bool phdr_in_segment; | |
4639 | bool writable; | |
4640 | bool executable; | |
4641 | unsigned int tls_count = 0; | |
4642 | asection *first_tls = NULL; | |
4643 | asection *first_mbind = NULL; | |
4644 | asection *dynsec, *eh_frame_hdr; | |
4645 | size_t amt; | |
4646 | bfd_vma addr_mask, wrap_to = 0; /* Bytes. */ | |
4647 | bfd_size_type phdr_size; /* Octets/bytes. */ | |
4648 | unsigned int opb = bfd_octets_per_byte (abfd, NULL); | |
4649 | ||
4650 | /* Select the allocated sections, and sort them. */ | |
4651 | ||
4652 | amt = bfd_count_sections (abfd) * sizeof (asection *); | |
4653 | sections = (asection **) bfd_malloc (amt); | |
4654 | if (sections == NULL) | |
4655 | goto error_return; | |
4656 | ||
4657 | /* Calculate top address, avoiding undefined behaviour of shift | |
4658 | left operator when shift count is equal to size of type | |
4659 | being shifted. */ | |
4660 | addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1; | |
4661 | addr_mask = (addr_mask << 1) + 1; | |
4662 | ||
4663 | i = 0; | |
4664 | for (s = abfd->sections; s != NULL; s = s->next) | |
4665 | { | |
4666 | if ((s->flags & SEC_ALLOC) != 0) | |
4667 | { | |
4668 | /* target_index is unused until bfd_elf_final_link | |
4669 | starts output of section symbols. Use it to make | |
4670 | qsort stable. */ | |
4671 | s->target_index = i; | |
4672 | sections[i] = s; | |
4673 | ++i; | |
4674 | /* A wrapping section potentially clashes with header. */ | |
4675 | if (((s->lma + s->size / opb) & addr_mask) < (s->lma & addr_mask)) | |
4676 | wrap_to = (s->lma + s->size / opb) & addr_mask; | |
4677 | } | |
4678 | } | |
4679 | BFD_ASSERT (i <= bfd_count_sections (abfd)); | |
4680 | count = i; | |
4681 | ||
4682 | qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections); | |
4683 | ||
4684 | phdr_size = elf_program_header_size (abfd); | |
4685 | if (phdr_size == (bfd_size_type) -1) | |
4686 | phdr_size = get_program_header_size (abfd, info); | |
4687 | phdr_size += bed->s->sizeof_ehdr; | |
4688 | /* phdr_size is compared to LMA values which are in bytes. */ | |
4689 | phdr_size /= opb; | |
4690 | if (info != NULL) | |
4691 | maxpagesize = info->maxpagesize; | |
4692 | else | |
4693 | maxpagesize = bed->maxpagesize; | |
4694 | if (maxpagesize == 0) | |
4695 | maxpagesize = 1; | |
4696 | phdr_in_segment = info != NULL && info->load_phdrs; | |
4697 | if (count != 0 | |
4698 | && (((sections[0]->lma & addr_mask) & (maxpagesize - 1)) | |
4699 | >= (phdr_size & (maxpagesize - 1)))) | |
4700 | /* For compatibility with old scripts that may not be using | |
4701 | SIZEOF_HEADERS, add headers when it looks like space has | |
4702 | been left for them. */ | |
4703 | phdr_in_segment = true; | |
4704 | ||
4705 | /* Build the mapping. */ | |
4706 | mfirst = NULL; | |
4707 | pm = &mfirst; | |
4708 | ||
4709 | /* If we have a .interp section, then create a PT_PHDR segment for | |
4710 | the program headers and a PT_INTERP segment for the .interp | |
4711 | section. */ | |
4712 | s = bfd_get_section_by_name (abfd, ".interp"); | |
4713 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->size != 0) | |
4714 | { | |
4715 | amt = sizeof (struct elf_segment_map); | |
4716 | m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
4717 | if (m == NULL) | |
4718 | goto error_return; | |
4719 | m->next = NULL; | |
4720 | m->p_type = PT_PHDR; | |
4721 | m->p_flags = PF_R; | |
4722 | m->p_flags_valid = 1; | |
4723 | m->includes_phdrs = 1; | |
4724 | phdr_in_segment = true; | |
4725 | *pm = m; | |
4726 | pm = &m->next; | |
4727 | ||
4728 | amt = sizeof (struct elf_segment_map); | |
4729 | m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
4730 | if (m == NULL) | |
4731 | goto error_return; | |
4732 | m->next = NULL; | |
4733 | m->p_type = PT_INTERP; | |
4734 | m->count = 1; | |
4735 | m->sections[0] = s; | |
4736 | ||
4737 | *pm = m; | |
4738 | pm = &m->next; | |
4739 | } | |
4740 | ||
4741 | /* Look through the sections. We put sections in the same program | |
4742 | segment when the start of the second section can be placed within | |
4743 | a few bytes of the end of the first section. */ | |
4744 | last_hdr = NULL; | |
4745 | last_size = 0; | |
4746 | hdr_index = 0; | |
4747 | writable = false; | |
4748 | executable = false; | |
4749 | dynsec = bfd_get_section_by_name (abfd, ".dynamic"); | |
4750 | if (dynsec != NULL | |
4751 | && (dynsec->flags & SEC_LOAD) == 0) | |
4752 | dynsec = NULL; | |
4753 | ||
4754 | if ((abfd->flags & D_PAGED) == 0) | |
4755 | phdr_in_segment = false; | |
4756 | ||
4757 | /* Deal with -Ttext or something similar such that the first section | |
4758 | is not adjacent to the program headers. This is an | |
4759 | approximation, since at this point we don't know exactly how many | |
4760 | program headers we will need. */ | |
4761 | if (phdr_in_segment && count > 0) | |
4762 | { | |
4763 | bfd_vma phdr_lma; /* Bytes. */ | |
4764 | bool separate_phdr = false; | |
4765 | ||
4766 | phdr_lma = (sections[0]->lma - phdr_size) & addr_mask & -maxpagesize; | |
4767 | if (info != NULL | |
4768 | && info->separate_code | |
4769 | && (sections[0]->flags & SEC_CODE) != 0) | |
4770 | { | |
4771 | /* If data sections should be separate from code and | |
4772 | thus not executable, and the first section is | |
4773 | executable then put the file and program headers in | |
4774 | their own PT_LOAD. */ | |
4775 | separate_phdr = true; | |
4776 | if ((((phdr_lma + phdr_size - 1) & addr_mask & -maxpagesize) | |
4777 | == (sections[0]->lma & addr_mask & -maxpagesize))) | |
4778 | { | |
4779 | /* The file and program headers are currently on the | |
4780 | same page as the first section. Put them on the | |
4781 | previous page if we can. */ | |
4782 | if (phdr_lma >= maxpagesize) | |
4783 | phdr_lma -= maxpagesize; | |
4784 | else | |
4785 | separate_phdr = false; | |
4786 | } | |
4787 | } | |
4788 | if ((sections[0]->lma & addr_mask) < phdr_lma | |
4789 | || (sections[0]->lma & addr_mask) < phdr_size) | |
4790 | /* If file and program headers would be placed at the end | |
4791 | of memory then it's probably better to omit them. */ | |
4792 | phdr_in_segment = false; | |
4793 | else if (phdr_lma < wrap_to) | |
4794 | /* If a section wraps around to where we'll be placing | |
4795 | file and program headers, then the headers will be | |
4796 | overwritten. */ | |
4797 | phdr_in_segment = false; | |
4798 | else if (separate_phdr) | |
4799 | { | |
4800 | m = make_mapping (abfd, sections, 0, 0, phdr_in_segment); | |
4801 | if (m == NULL) | |
4802 | goto error_return; | |
4803 | m->p_paddr = phdr_lma * opb; | |
4804 | m->p_vaddr_offset | |
4805 | = (sections[0]->vma - phdr_size) & addr_mask & -maxpagesize; | |
4806 | m->p_paddr_valid = 1; | |
4807 | *pm = m; | |
4808 | pm = &m->next; | |
4809 | phdr_in_segment = false; | |
4810 | } | |
4811 | } | |
4812 | ||
4813 | for (i = 0, hdrpp = sections; i < count; i++, hdrpp++) | |
4814 | { | |
4815 | asection *hdr; | |
4816 | bool new_segment; | |
4817 | ||
4818 | hdr = *hdrpp; | |
4819 | ||
4820 | /* See if this section and the last one will fit in the same | |
4821 | segment. */ | |
4822 | ||
4823 | if (last_hdr == NULL) | |
4824 | { | |
4825 | /* If we don't have a segment yet, then we don't need a new | |
4826 | one (we build the last one after this loop). */ | |
4827 | new_segment = false; | |
4828 | } | |
4829 | else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma) | |
4830 | { | |
4831 | /* If this section has a different relation between the | |
4832 | virtual address and the load address, then we need a new | |
4833 | segment. */ | |
4834 | new_segment = true; | |
4835 | } | |
4836 | else if (hdr->lma < last_hdr->lma + last_size | |
4837 | || last_hdr->lma + last_size < last_hdr->lma) | |
4838 | { | |
4839 | /* If this section has a load address that makes it overlap | |
4840 | the previous section, then we need a new segment. */ | |
4841 | new_segment = true; | |
4842 | } | |
4843 | else if ((abfd->flags & D_PAGED) != 0 | |
4844 | && (((last_hdr->lma + last_size - 1) & -maxpagesize) | |
4845 | == (hdr->lma & -maxpagesize))) | |
4846 | { | |
4847 | /* If we are demand paged then we can't map two disk | |
4848 | pages onto the same memory page. */ | |
4849 | new_segment = false; | |
4850 | } | |
4851 | /* In the next test we have to be careful when last_hdr->lma is close | |
4852 | to the end of the address space. If the aligned address wraps | |
4853 | around to the start of the address space, then there are no more | |
4854 | pages left in memory and it is OK to assume that the current | |
4855 | section can be included in the current segment. */ | |
4856 | else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) | |
4857 | + maxpagesize > last_hdr->lma) | |
4858 | && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) | |
4859 | + maxpagesize <= hdr->lma)) | |
4860 | { | |
4861 | /* If putting this section in this segment would force us to | |
4862 | skip a page in the segment, then we need a new segment. */ | |
4863 | new_segment = true; | |
4864 | } | |
4865 | else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0 | |
4866 | && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0) | |
4867 | { | |
4868 | /* We don't want to put a loaded section after a | |
4869 | nonloaded (ie. bss style) section in the same segment | |
4870 | as that will force the non-loaded section to be loaded. | |
4871 | Consider .tbss sections as loaded for this purpose. */ | |
4872 | new_segment = true; | |
4873 | } | |
4874 | else if ((abfd->flags & D_PAGED) == 0) | |
4875 | { | |
4876 | /* If the file is not demand paged, which means that we | |
4877 | don't require the sections to be correctly aligned in the | |
4878 | file, then there is no other reason for a new segment. */ | |
4879 | new_segment = false; | |
4880 | } | |
4881 | else if (info != NULL | |
4882 | && info->separate_code | |
4883 | && executable != ((hdr->flags & SEC_CODE) != 0)) | |
4884 | { | |
4885 | new_segment = true; | |
4886 | } | |
4887 | else if (! writable | |
4888 | && (hdr->flags & SEC_READONLY) == 0) | |
4889 | { | |
4890 | /* We don't want to put a writable section in a read only | |
4891 | segment. */ | |
4892 | new_segment = true; | |
4893 | } | |
4894 | else | |
4895 | { | |
4896 | /* Otherwise, we can use the same segment. */ | |
4897 | new_segment = false; | |
4898 | } | |
4899 | ||
4900 | /* Allow interested parties a chance to override our decision. */ | |
4901 | if (last_hdr != NULL | |
4902 | && info != NULL | |
4903 | && info->callbacks->override_segment_assignment != NULL) | |
4904 | new_segment | |
4905 | = info->callbacks->override_segment_assignment (info, abfd, hdr, | |
4906 | last_hdr, | |
4907 | new_segment); | |
4908 | ||
4909 | if (! new_segment) | |
4910 | { | |
4911 | if ((hdr->flags & SEC_READONLY) == 0) | |
4912 | writable = true; | |
4913 | if ((hdr->flags & SEC_CODE) != 0) | |
4914 | executable = true; | |
4915 | last_hdr = hdr; | |
4916 | /* .tbss sections effectively have zero size. */ | |
4917 | last_size = (!IS_TBSS (hdr) ? hdr->size : 0) / opb; | |
4918 | continue; | |
4919 | } | |
4920 | ||
4921 | /* We need a new program segment. We must create a new program | |
4922 | header holding all the sections from hdr_index until hdr. */ | |
4923 | ||
4924 | m = make_mapping (abfd, sections, hdr_index, i, phdr_in_segment); | |
4925 | if (m == NULL) | |
4926 | goto error_return; | |
4927 | ||
4928 | *pm = m; | |
4929 | pm = &m->next; | |
4930 | ||
4931 | if ((hdr->flags & SEC_READONLY) == 0) | |
4932 | writable = true; | |
4933 | else | |
4934 | writable = false; | |
4935 | ||
4936 | if ((hdr->flags & SEC_CODE) == 0) | |
4937 | executable = false; | |
4938 | else | |
4939 | executable = true; | |
4940 | ||
4941 | last_hdr = hdr; | |
4942 | /* .tbss sections effectively have zero size. */ | |
4943 | last_size = (!IS_TBSS (hdr) ? hdr->size : 0) / opb; | |
4944 | hdr_index = i; | |
4945 | phdr_in_segment = false; | |
4946 | } | |
4947 | ||
4948 | /* Create a final PT_LOAD program segment, but not if it's just | |
4949 | for .tbss. */ | |
4950 | if (last_hdr != NULL | |
4951 | && (i - hdr_index != 1 | |
4952 | || !IS_TBSS (last_hdr))) | |
4953 | { | |
4954 | m = make_mapping (abfd, sections, hdr_index, i, phdr_in_segment); | |
4955 | if (m == NULL) | |
4956 | goto error_return; | |
4957 | ||
4958 | *pm = m; | |
4959 | pm = &m->next; | |
4960 | } | |
4961 | ||
4962 | /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */ | |
4963 | if (dynsec != NULL) | |
4964 | { | |
4965 | m = _bfd_elf_make_dynamic_segment (abfd, dynsec); | |
4966 | if (m == NULL) | |
4967 | goto error_return; | |
4968 | *pm = m; | |
4969 | pm = &m->next; | |
4970 | } | |
4971 | ||
4972 | /* For each batch of consecutive loadable SHT_NOTE sections, | |
4973 | add a PT_NOTE segment. We don't use bfd_get_section_by_name, | |
4974 | because if we link together nonloadable .note sections and | |
4975 | loadable .note sections, we will generate two .note sections | |
4976 | in the output file. */ | |
4977 | for (s = abfd->sections; s != NULL; s = s->next) | |
4978 | { | |
4979 | if ((s->flags & SEC_LOAD) != 0 | |
4980 | && elf_section_type (s) == SHT_NOTE) | |
4981 | { | |
4982 | asection *s2; | |
4983 | unsigned int alignment_power = s->alignment_power; | |
4984 | ||
4985 | count = 1; | |
4986 | for (s2 = s; s2->next != NULL; s2 = s2->next) | |
4987 | { | |
4988 | if (s2->next->alignment_power == alignment_power | |
4989 | && (s2->next->flags & SEC_LOAD) != 0 | |
4990 | && elf_section_type (s2->next) == SHT_NOTE | |
4991 | && align_power (s2->lma + s2->size / opb, | |
4992 | alignment_power) | |
4993 | == s2->next->lma) | |
4994 | count++; | |
4995 | else | |
4996 | break; | |
4997 | } | |
4998 | amt = sizeof (struct elf_segment_map) - sizeof (asection *); | |
4999 | amt += count * sizeof (asection *); | |
5000 | m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
5001 | if (m == NULL) | |
5002 | goto error_return; | |
5003 | m->next = NULL; | |
5004 | m->p_type = PT_NOTE; | |
5005 | m->count = count; | |
5006 | while (count > 1) | |
5007 | { | |
5008 | m->sections[m->count - count--] = s; | |
5009 | BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0); | |
5010 | s = s->next; | |
5011 | } | |
5012 | m->sections[m->count - 1] = s; | |
5013 | BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0); | |
5014 | *pm = m; | |
5015 | pm = &m->next; | |
5016 | } | |
5017 | if (s->flags & SEC_THREAD_LOCAL) | |
5018 | { | |
5019 | if (! tls_count) | |
5020 | first_tls = s; | |
5021 | tls_count++; | |
5022 | } | |
5023 | if (first_mbind == NULL | |
5024 | && (elf_section_flags (s) & SHF_GNU_MBIND) != 0) | |
5025 | first_mbind = s; | |
5026 | } | |
5027 | ||
5028 | /* If there are any SHF_TLS output sections, add PT_TLS segment. */ | |
5029 | if (tls_count > 0) | |
5030 | { | |
5031 | amt = sizeof (struct elf_segment_map) - sizeof (asection *); | |
5032 | amt += tls_count * sizeof (asection *); | |
5033 | m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
5034 | if (m == NULL) | |
5035 | goto error_return; | |
5036 | m->next = NULL; | |
5037 | m->p_type = PT_TLS; | |
5038 | m->count = tls_count; | |
5039 | /* Mandated PF_R. */ | |
5040 | m->p_flags = PF_R; | |
5041 | m->p_flags_valid = 1; | |
5042 | s = first_tls; | |
5043 | for (i = 0; i < tls_count; ++i) | |
5044 | { | |
5045 | if ((s->flags & SEC_THREAD_LOCAL) == 0) | |
5046 | { | |
5047 | _bfd_error_handler | |
5048 | (_("%pB: TLS sections are not adjacent:"), abfd); | |
5049 | s = first_tls; | |
5050 | i = 0; | |
5051 | while (i < tls_count) | |
5052 | { | |
5053 | if ((s->flags & SEC_THREAD_LOCAL) != 0) | |
5054 | { | |
5055 | _bfd_error_handler (_(" TLS: %pA"), s); | |
5056 | i++; | |
5057 | } | |
5058 | else | |
5059 | _bfd_error_handler (_(" non-TLS: %pA"), s); | |
5060 | s = s->next; | |
5061 | } | |
5062 | bfd_set_error (bfd_error_bad_value); | |
5063 | goto error_return; | |
5064 | } | |
5065 | m->sections[i] = s; | |
5066 | s = s->next; | |
5067 | } | |
5068 | ||
5069 | *pm = m; | |
5070 | pm = &m->next; | |
5071 | } | |
5072 | ||
5073 | if (first_mbind | |
5074 | && (abfd->flags & D_PAGED) != 0 | |
5075 | && (elf_tdata (abfd)->has_gnu_osabi & elf_gnu_osabi_mbind) != 0) | |
5076 | for (s = first_mbind; s != NULL; s = s->next) | |
5077 | if ((elf_section_flags (s) & SHF_GNU_MBIND) != 0 | |
5078 | && elf_section_data (s)->this_hdr.sh_info <= PT_GNU_MBIND_NUM) | |
5079 | { | |
5080 | /* Mandated PF_R. */ | |
5081 | unsigned long p_flags = PF_R; | |
5082 | if ((s->flags & SEC_READONLY) == 0) | |
5083 | p_flags |= PF_W; | |
5084 | if ((s->flags & SEC_CODE) != 0) | |
5085 | p_flags |= PF_X; | |
5086 | ||
5087 | amt = sizeof (struct elf_segment_map) + sizeof (asection *); | |
5088 | m = bfd_zalloc (abfd, amt); | |
5089 | if (m == NULL) | |
5090 | goto error_return; | |
5091 | m->next = NULL; | |
5092 | m->p_type = (PT_GNU_MBIND_LO | |
5093 | + elf_section_data (s)->this_hdr.sh_info); | |
5094 | m->count = 1; | |
5095 | m->p_flags_valid = 1; | |
5096 | m->sections[0] = s; | |
5097 | m->p_flags = p_flags; | |
5098 | ||
5099 | *pm = m; | |
5100 | pm = &m->next; | |
5101 | } | |
5102 | ||
5103 | s = bfd_get_section_by_name (abfd, | |
5104 | NOTE_GNU_PROPERTY_SECTION_NAME); | |
5105 | if (s != NULL && s->size != 0) | |
5106 | { | |
5107 | amt = sizeof (struct elf_segment_map) + sizeof (asection *); | |
5108 | m = bfd_zalloc (abfd, amt); | |
5109 | if (m == NULL) | |
5110 | goto error_return; | |
5111 | m->next = NULL; | |
5112 | m->p_type = PT_GNU_PROPERTY; | |
5113 | m->count = 1; | |
5114 | m->p_flags_valid = 1; | |
5115 | m->sections[0] = s; | |
5116 | m->p_flags = PF_R; | |
5117 | *pm = m; | |
5118 | pm = &m->next; | |
5119 | } | |
5120 | ||
5121 | /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME | |
5122 | segment. */ | |
5123 | eh_frame_hdr = elf_eh_frame_hdr (abfd); | |
5124 | if (eh_frame_hdr != NULL | |
5125 | && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0) | |
5126 | { | |
5127 | amt = sizeof (struct elf_segment_map); | |
5128 | m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
5129 | if (m == NULL) | |
5130 | goto error_return; | |
5131 | m->next = NULL; | |
5132 | m->p_type = PT_GNU_EH_FRAME; | |
5133 | m->count = 1; | |
5134 | m->sections[0] = eh_frame_hdr->output_section; | |
5135 | ||
5136 | *pm = m; | |
5137 | pm = &m->next; | |
5138 | } | |
5139 | ||
5140 | if (elf_stack_flags (abfd)) | |
5141 | { | |
5142 | amt = sizeof (struct elf_segment_map); | |
5143 | m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
5144 | if (m == NULL) | |
5145 | goto error_return; | |
5146 | m->next = NULL; | |
5147 | m->p_type = PT_GNU_STACK; | |
5148 | m->p_flags = elf_stack_flags (abfd); | |
5149 | m->p_align = bed->stack_align; | |
5150 | m->p_flags_valid = 1; | |
5151 | m->p_align_valid = m->p_align != 0; | |
5152 | if (info->stacksize > 0) | |
5153 | { | |
5154 | m->p_size = info->stacksize; | |
5155 | m->p_size_valid = 1; | |
5156 | } | |
5157 | ||
5158 | *pm = m; | |
5159 | pm = &m->next; | |
5160 | } | |
5161 | ||
5162 | if (info != NULL && info->relro) | |
5163 | { | |
5164 | for (m = mfirst; m != NULL; m = m->next) | |
5165 | { | |
5166 | if (m->p_type == PT_LOAD | |
5167 | && m->count != 0 | |
5168 | && m->sections[0]->vma >= info->relro_start | |
5169 | && m->sections[0]->vma < info->relro_end) | |
5170 | { | |
5171 | i = m->count; | |
5172 | while (--i != (unsigned) -1) | |
5173 | { | |
5174 | if (m->sections[i]->size > 0 | |
5175 | && (m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) | |
5176 | == (SEC_LOAD | SEC_HAS_CONTENTS)) | |
5177 | break; | |
5178 | } | |
5179 | ||
5180 | if (i != (unsigned) -1) | |
5181 | break; | |
5182 | } | |
5183 | } | |
5184 | ||
5185 | /* Make a PT_GNU_RELRO segment only when it isn't empty. */ | |
5186 | if (m != NULL) | |
5187 | { | |
5188 | amt = sizeof (struct elf_segment_map); | |
5189 | m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
5190 | if (m == NULL) | |
5191 | goto error_return; | |
5192 | m->next = NULL; | |
5193 | m->p_type = PT_GNU_RELRO; | |
5194 | *pm = m; | |
5195 | pm = &m->next; | |
5196 | } | |
5197 | } | |
5198 | ||
5199 | free (sections); | |
5200 | elf_seg_map (abfd) = mfirst; | |
5201 | } | |
5202 | ||
5203 | if (!elf_modify_segment_map (abfd, info, no_user_phdrs)) | |
5204 | return false; | |
5205 | ||
5206 | for (count = 0, m = elf_seg_map (abfd); m != NULL; m = m->next) | |
5207 | ++count; | |
5208 | elf_program_header_size (abfd) = count * bed->s->sizeof_phdr; | |
5209 | ||
5210 | return true; | |
5211 | ||
5212 | error_return: | |
5213 | free (sections); | |
5214 | return false; | |
5215 | } | |
5216 | ||
5217 | /* Sort sections by address. */ | |
5218 | ||
5219 | static int | |
5220 | elf_sort_sections (const void *arg1, const void *arg2) | |
5221 | { | |
5222 | const asection *sec1 = *(const asection **) arg1; | |
5223 | const asection *sec2 = *(const asection **) arg2; | |
5224 | bfd_size_type size1, size2; | |
5225 | ||
5226 | /* Sort by LMA first, since this is the address used to | |
5227 | place the section into a segment. */ | |
5228 | if (sec1->lma < sec2->lma) | |
5229 | return -1; | |
5230 | else if (sec1->lma > sec2->lma) | |
5231 | return 1; | |
5232 | ||
5233 | /* Then sort by VMA. Normally the LMA and the VMA will be | |
5234 | the same, and this will do nothing. */ | |
5235 | if (sec1->vma < sec2->vma) | |
5236 | return -1; | |
5237 | else if (sec1->vma > sec2->vma) | |
5238 | return 1; | |
5239 | ||
5240 | /* Put !SEC_LOAD sections after SEC_LOAD ones. */ | |
5241 | ||
5242 | #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0 \ | |
5243 | && (x)->size != 0) | |
5244 | ||
5245 | if (TOEND (sec1)) | |
5246 | { | |
5247 | if (!TOEND (sec2)) | |
5248 | return 1; | |
5249 | } | |
5250 | else if (TOEND (sec2)) | |
5251 | return -1; | |
5252 | ||
5253 | #undef TOEND | |
5254 | ||
5255 | /* Sort by size, to put zero sized sections | |
5256 | before others at the same address. */ | |
5257 | ||
5258 | size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0; | |
5259 | size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0; | |
5260 | ||
5261 | if (size1 < size2) | |
5262 | return -1; | |
5263 | if (size1 > size2) | |
5264 | return 1; | |
5265 | ||
5266 | return sec1->target_index - sec2->target_index; | |
5267 | } | |
5268 | ||
5269 | /* This qsort comparison functions sorts PT_LOAD segments first and | |
5270 | by p_paddr, for assign_file_positions_for_load_sections. */ | |
5271 | ||
5272 | static int | |
5273 | elf_sort_segments (const void *arg1, const void *arg2) | |
5274 | { | |
5275 | const struct elf_segment_map *m1 = *(const struct elf_segment_map **) arg1; | |
5276 | const struct elf_segment_map *m2 = *(const struct elf_segment_map **) arg2; | |
5277 | ||
5278 | if (m1->p_type != m2->p_type) | |
5279 | { | |
5280 | if (m1->p_type == PT_NULL) | |
5281 | return 1; | |
5282 | if (m2->p_type == PT_NULL) | |
5283 | return -1; | |
5284 | return m1->p_type < m2->p_type ? -1 : 1; | |
5285 | } | |
5286 | if (m1->includes_filehdr != m2->includes_filehdr) | |
5287 | return m1->includes_filehdr ? -1 : 1; | |
5288 | if (m1->no_sort_lma != m2->no_sort_lma) | |
5289 | return m1->no_sort_lma ? -1 : 1; | |
5290 | if (m1->p_type == PT_LOAD && !m1->no_sort_lma) | |
5291 | { | |
5292 | bfd_vma lma1, lma2; /* Octets. */ | |
5293 | lma1 = 0; | |
5294 | if (m1->p_paddr_valid) | |
5295 | lma1 = m1->p_paddr; | |
5296 | else if (m1->count != 0) | |
5297 | { | |
5298 | unsigned int opb = bfd_octets_per_byte (m1->sections[0]->owner, | |
5299 | m1->sections[0]); | |
5300 | lma1 = (m1->sections[0]->lma + m1->p_vaddr_offset) * opb; | |
5301 | } | |
5302 | lma2 = 0; | |
5303 | if (m2->p_paddr_valid) | |
5304 | lma2 = m2->p_paddr; | |
5305 | else if (m2->count != 0) | |
5306 | { | |
5307 | unsigned int opb = bfd_octets_per_byte (m2->sections[0]->owner, | |
5308 | m2->sections[0]); | |
5309 | lma2 = (m2->sections[0]->lma + m2->p_vaddr_offset) * opb; | |
5310 | } | |
5311 | if (lma1 != lma2) | |
5312 | return lma1 < lma2 ? -1 : 1; | |
5313 | } | |
5314 | if (m1->idx != m2->idx) | |
5315 | return m1->idx < m2->idx ? -1 : 1; | |
5316 | return 0; | |
5317 | } | |
5318 | ||
5319 | /* Ian Lance Taylor writes: | |
5320 | ||
5321 | We shouldn't be using % with a negative signed number. That's just | |
5322 | not good. We have to make sure either that the number is not | |
5323 | negative, or that the number has an unsigned type. When the types | |
5324 | are all the same size they wind up as unsigned. When file_ptr is a | |
5325 | larger signed type, the arithmetic winds up as signed long long, | |
5326 | which is wrong. | |
5327 | ||
5328 | What we're trying to say here is something like ``increase OFF by | |
5329 | the least amount that will cause it to be equal to the VMA modulo | |
5330 | the page size.'' */ | |
5331 | /* In other words, something like: | |
5332 | ||
5333 | vma_offset = m->sections[0]->vma % bed->maxpagesize; | |
5334 | off_offset = off % bed->maxpagesize; | |
5335 | if (vma_offset < off_offset) | |
5336 | adjustment = vma_offset + bed->maxpagesize - off_offset; | |
5337 | else | |
5338 | adjustment = vma_offset - off_offset; | |
5339 | ||
5340 | which can be collapsed into the expression below. */ | |
5341 | ||
5342 | static file_ptr | |
5343 | vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize) | |
5344 | { | |
5345 | /* PR binutils/16199: Handle an alignment of zero. */ | |
5346 | if (maxpagesize == 0) | |
5347 | maxpagesize = 1; | |
5348 | return ((vma - off) % maxpagesize); | |
5349 | } | |
5350 | ||
5351 | static void | |
5352 | print_segment_map (const struct elf_segment_map *m) | |
5353 | { | |
5354 | unsigned int j; | |
5355 | const char *pt = get_segment_type (m->p_type); | |
5356 | char buf[32]; | |
5357 | ||
5358 | if (pt == NULL) | |
5359 | { | |
5360 | if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC) | |
5361 | sprintf (buf, "LOPROC+%7.7x", | |
5362 | (unsigned int) (m->p_type - PT_LOPROC)); | |
5363 | else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS) | |
5364 | sprintf (buf, "LOOS+%7.7x", | |
5365 | (unsigned int) (m->p_type - PT_LOOS)); | |
5366 | else | |
5367 | snprintf (buf, sizeof (buf), "%8.8x", | |
5368 | (unsigned int) m->p_type); | |
5369 | pt = buf; | |
5370 | } | |
5371 | fflush (stdout); | |
5372 | fprintf (stderr, "%s:", pt); | |
5373 | for (j = 0; j < m->count; j++) | |
5374 | fprintf (stderr, " %s", m->sections [j]->name); | |
5375 | putc ('\n',stderr); | |
5376 | fflush (stderr); | |
5377 | } | |
5378 | ||
5379 | static bool | |
5380 | write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len) | |
5381 | { | |
5382 | void *buf; | |
5383 | bool ret; | |
5384 | ||
5385 | if (bfd_seek (abfd, pos, SEEK_SET) != 0) | |
5386 | return false; | |
5387 | buf = bfd_zmalloc (len); | |
5388 | if (buf == NULL) | |
5389 | return false; | |
5390 | ret = bfd_bwrite (buf, len, abfd) == len; | |
5391 | free (buf); | |
5392 | return ret; | |
5393 | } | |
5394 | ||
5395 | /* Assign file positions to the sections based on the mapping from | |
5396 | sections to segments. This function also sets up some fields in | |
5397 | the file header. */ | |
5398 | ||
5399 | static bool | |
5400 | assign_file_positions_for_load_sections (bfd *abfd, | |
5401 | struct bfd_link_info *link_info) | |
5402 | { | |
5403 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5404 | struct elf_segment_map *m; | |
5405 | struct elf_segment_map *phdr_load_seg; | |
5406 | Elf_Internal_Phdr *phdrs; | |
5407 | Elf_Internal_Phdr *p; | |
5408 | file_ptr off; /* Octets. */ | |
5409 | bfd_size_type maxpagesize; | |
5410 | unsigned int alloc, actual; | |
5411 | unsigned int i, j; | |
5412 | struct elf_segment_map **sorted_seg_map; | |
5413 | unsigned int opb = bfd_octets_per_byte (abfd, NULL); | |
5414 | ||
5415 | if (link_info == NULL | |
5416 | && !_bfd_elf_map_sections_to_segments (abfd, link_info)) | |
5417 | return false; | |
5418 | ||
5419 | alloc = 0; | |
5420 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) | |
5421 | m->idx = alloc++; | |
5422 | ||
5423 | if (alloc) | |
5424 | { | |
5425 | elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr; | |
5426 | elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr; | |
5427 | } | |
5428 | else | |
5429 | { | |
5430 | /* PR binutils/12467. */ | |
5431 | elf_elfheader (abfd)->e_phoff = 0; | |
5432 | elf_elfheader (abfd)->e_phentsize = 0; | |
5433 | } | |
5434 | ||
5435 | elf_elfheader (abfd)->e_phnum = alloc; | |
5436 | ||
5437 | if (elf_program_header_size (abfd) == (bfd_size_type) -1) | |
5438 | { | |
5439 | actual = alloc; | |
5440 | elf_program_header_size (abfd) = alloc * bed->s->sizeof_phdr; | |
5441 | } | |
5442 | else | |
5443 | { | |
5444 | actual = elf_program_header_size (abfd) / bed->s->sizeof_phdr; | |
5445 | BFD_ASSERT (elf_program_header_size (abfd) | |
5446 | == actual * bed->s->sizeof_phdr); | |
5447 | BFD_ASSERT (actual >= alloc); | |
5448 | } | |
5449 | ||
5450 | if (alloc == 0) | |
5451 | { | |
5452 | elf_next_file_pos (abfd) = bed->s->sizeof_ehdr; | |
5453 | return true; | |
5454 | } | |
5455 | ||
5456 | /* We're writing the size in elf_program_header_size (abfd), | |
5457 | see assign_file_positions_except_relocs, so make sure we have | |
5458 | that amount allocated, with trailing space cleared. | |
5459 | The variable alloc contains the computed need, while | |
5460 | elf_program_header_size (abfd) contains the size used for the | |
5461 | layout. | |
5462 | See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments | |
5463 | where the layout is forced to according to a larger size in the | |
5464 | last iterations for the testcase ld-elf/header. */ | |
5465 | phdrs = bfd_zalloc (abfd, (actual * sizeof (*phdrs) | |
5466 | + alloc * sizeof (*sorted_seg_map))); | |
5467 | sorted_seg_map = (struct elf_segment_map **) (phdrs + actual); | |
5468 | elf_tdata (abfd)->phdr = phdrs; | |
5469 | if (phdrs == NULL) | |
5470 | return false; | |
5471 | ||
5472 | for (m = elf_seg_map (abfd), j = 0; m != NULL; m = m->next, j++) | |
5473 | { | |
5474 | sorted_seg_map[j] = m; | |
5475 | /* If elf_segment_map is not from map_sections_to_segments, the | |
5476 | sections may not be correctly ordered. NOTE: sorting should | |
5477 | not be done to the PT_NOTE section of a corefile, which may | |
5478 | contain several pseudo-sections artificially created by bfd. | |
5479 | Sorting these pseudo-sections breaks things badly. */ | |
5480 | if (m->count > 1 | |
5481 | && !(elf_elfheader (abfd)->e_type == ET_CORE | |
5482 | && m->p_type == PT_NOTE)) | |
5483 | { | |
5484 | for (i = 0; i < m->count; i++) | |
5485 | m->sections[i]->target_index = i; | |
5486 | qsort (m->sections, (size_t) m->count, sizeof (asection *), | |
5487 | elf_sort_sections); | |
5488 | } | |
5489 | } | |
5490 | if (alloc > 1) | |
5491 | qsort (sorted_seg_map, alloc, sizeof (*sorted_seg_map), | |
5492 | elf_sort_segments); | |
5493 | ||
5494 | maxpagesize = 1; | |
5495 | if ((abfd->flags & D_PAGED) != 0) | |
5496 | { | |
5497 | if (link_info != NULL) | |
5498 | maxpagesize = link_info->maxpagesize; | |
5499 | else | |
5500 | maxpagesize = bed->maxpagesize; | |
5501 | } | |
5502 | ||
5503 | /* Sections must map to file offsets past the ELF file header. */ | |
5504 | off = bed->s->sizeof_ehdr; | |
5505 | /* And if one of the PT_LOAD headers doesn't include the program | |
5506 | headers then we'll be mapping program headers in the usual | |
5507 | position after the ELF file header. */ | |
5508 | phdr_load_seg = NULL; | |
5509 | for (j = 0; j < alloc; j++) | |
5510 | { | |
5511 | m = sorted_seg_map[j]; | |
5512 | if (m->p_type != PT_LOAD) | |
5513 | break; | |
5514 | if (m->includes_phdrs) | |
5515 | { | |
5516 | phdr_load_seg = m; | |
5517 | break; | |
5518 | } | |
5519 | } | |
5520 | if (phdr_load_seg == NULL) | |
5521 | off += actual * bed->s->sizeof_phdr; | |
5522 | ||
5523 | for (j = 0; j < alloc; j++) | |
5524 | { | |
5525 | asection **secpp; | |
5526 | bfd_vma off_adjust; /* Octets. */ | |
5527 | bool no_contents; | |
5528 | ||
5529 | /* An ELF segment (described by Elf_Internal_Phdr) may contain a | |
5530 | number of sections with contents contributing to both p_filesz | |
5531 | and p_memsz, followed by a number of sections with no contents | |
5532 | that just contribute to p_memsz. In this loop, OFF tracks next | |
5533 | available file offset for PT_LOAD and PT_NOTE segments. */ | |
5534 | m = sorted_seg_map[j]; | |
5535 | p = phdrs + m->idx; | |
5536 | p->p_type = m->p_type; | |
5537 | p->p_flags = m->p_flags; | |
5538 | ||
5539 | if (m->count == 0) | |
5540 | p->p_vaddr = m->p_vaddr_offset * opb; | |
5541 | else | |
5542 | p->p_vaddr = (m->sections[0]->vma + m->p_vaddr_offset) * opb; | |
5543 | ||
5544 | if (m->p_paddr_valid) | |
5545 | p->p_paddr = m->p_paddr; | |
5546 | else if (m->count == 0) | |
5547 | p->p_paddr = 0; | |
5548 | else | |
5549 | p->p_paddr = (m->sections[0]->lma + m->p_vaddr_offset) * opb; | |
5550 | ||
5551 | if (p->p_type == PT_LOAD | |
5552 | && (abfd->flags & D_PAGED) != 0) | |
5553 | { | |
5554 | /* p_align in demand paged PT_LOAD segments effectively stores | |
5555 | the maximum page size. When copying an executable with | |
5556 | objcopy, we set m->p_align from the input file. Use this | |
5557 | value for maxpagesize rather than bed->maxpagesize, which | |
5558 | may be different. Note that we use maxpagesize for PT_TLS | |
5559 | segment alignment later in this function, so we are relying | |
5560 | on at least one PT_LOAD segment appearing before a PT_TLS | |
5561 | segment. */ | |
5562 | if (m->p_align_valid) | |
5563 | maxpagesize = m->p_align; | |
5564 | ||
5565 | p->p_align = maxpagesize; | |
5566 | } | |
5567 | else if (m->p_align_valid) | |
5568 | p->p_align = m->p_align; | |
5569 | else if (m->count == 0) | |
5570 | p->p_align = 1 << bed->s->log_file_align; | |
5571 | ||
5572 | if (m == phdr_load_seg) | |
5573 | { | |
5574 | if (!m->includes_filehdr) | |
5575 | p->p_offset = off; | |
5576 | off += actual * bed->s->sizeof_phdr; | |
5577 | } | |
5578 | ||
5579 | no_contents = false; | |
5580 | off_adjust = 0; | |
5581 | if (p->p_type == PT_LOAD | |
5582 | && m->count > 0) | |
5583 | { | |
5584 | bfd_size_type align; /* Bytes. */ | |
5585 | unsigned int align_power = 0; | |
5586 | ||
5587 | if (m->p_align_valid) | |
5588 | align = p->p_align; | |
5589 | else | |
5590 | { | |
5591 | for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) | |
5592 | { | |
5593 | unsigned int secalign; | |
5594 | ||
5595 | secalign = bfd_section_alignment (*secpp); | |
5596 | if (secalign > align_power) | |
5597 | align_power = secalign; | |
5598 | } | |
5599 | align = (bfd_size_type) 1 << align_power; | |
5600 | if (align < maxpagesize) | |
5601 | align = maxpagesize; | |
5602 | } | |
5603 | ||
5604 | for (i = 0; i < m->count; i++) | |
5605 | if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) | |
5606 | /* If we aren't making room for this section, then | |
5607 | it must be SHT_NOBITS regardless of what we've | |
5608 | set via struct bfd_elf_special_section. */ | |
5609 | elf_section_type (m->sections[i]) = SHT_NOBITS; | |
5610 | ||
5611 | /* Find out whether this segment contains any loadable | |
5612 | sections. */ | |
5613 | no_contents = true; | |
5614 | for (i = 0; i < m->count; i++) | |
5615 | if (elf_section_type (m->sections[i]) != SHT_NOBITS) | |
5616 | { | |
5617 | no_contents = false; | |
5618 | break; | |
5619 | } | |
5620 | ||
5621 | off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align * opb); | |
5622 | ||
5623 | /* Broken hardware and/or kernel require that files do not | |
5624 | map the same page with different permissions on some hppa | |
5625 | processors. */ | |
5626 | if (j != 0 | |
5627 | && (abfd->flags & D_PAGED) != 0 | |
5628 | && bed->no_page_alias | |
5629 | && (off & (maxpagesize - 1)) != 0 | |
5630 | && ((off & -maxpagesize) | |
5631 | == ((off + off_adjust) & -maxpagesize))) | |
5632 | off_adjust += maxpagesize; | |
5633 | off += off_adjust; | |
5634 | if (no_contents) | |
5635 | { | |
5636 | /* We shouldn't need to align the segment on disk since | |
5637 | the segment doesn't need file space, but the gABI | |
5638 | arguably requires the alignment and glibc ld.so | |
5639 | checks it. So to comply with the alignment | |
5640 | requirement but not waste file space, we adjust | |
5641 | p_offset for just this segment. (OFF_ADJUST is | |
5642 | subtracted from OFF later.) This may put p_offset | |
5643 | past the end of file, but that shouldn't matter. */ | |
5644 | } | |
5645 | else | |
5646 | off_adjust = 0; | |
5647 | } | |
5648 | /* Make sure the .dynamic section is the first section in the | |
5649 | PT_DYNAMIC segment. */ | |
5650 | else if (p->p_type == PT_DYNAMIC | |
5651 | && m->count > 1 | |
5652 | && strcmp (m->sections[0]->name, ".dynamic") != 0) | |
5653 | { | |
5654 | _bfd_error_handler | |
5655 | (_("%pB: The first section in the PT_DYNAMIC segment" | |
5656 | " is not the .dynamic section"), | |
5657 | abfd); | |
5658 | bfd_set_error (bfd_error_bad_value); | |
5659 | return false; | |
5660 | } | |
5661 | /* Set the note section type to SHT_NOTE. */ | |
5662 | else if (p->p_type == PT_NOTE) | |
5663 | for (i = 0; i < m->count; i++) | |
5664 | elf_section_type (m->sections[i]) = SHT_NOTE; | |
5665 | ||
5666 | if (m->includes_filehdr) | |
5667 | { | |
5668 | if (!m->p_flags_valid) | |
5669 | p->p_flags |= PF_R; | |
5670 | p->p_filesz = bed->s->sizeof_ehdr; | |
5671 | p->p_memsz = bed->s->sizeof_ehdr; | |
5672 | if (p->p_type == PT_LOAD) | |
5673 | { | |
5674 | if (m->count > 0) | |
5675 | { | |
5676 | if (p->p_vaddr < (bfd_vma) off | |
5677 | || (!m->p_paddr_valid | |
5678 | && p->p_paddr < (bfd_vma) off)) | |
5679 | { | |
5680 | _bfd_error_handler | |
5681 | (_("%pB: not enough room for program headers," | |
5682 | " try linking with -N"), | |
5683 | abfd); | |
5684 | bfd_set_error (bfd_error_bad_value); | |
5685 | return false; | |
5686 | } | |
5687 | p->p_vaddr -= off; | |
5688 | if (!m->p_paddr_valid) | |
5689 | p->p_paddr -= off; | |
5690 | } | |
5691 | } | |
5692 | else if (sorted_seg_map[0]->includes_filehdr) | |
5693 | { | |
5694 | Elf_Internal_Phdr *filehdr = phdrs + sorted_seg_map[0]->idx; | |
5695 | p->p_vaddr = filehdr->p_vaddr; | |
5696 | if (!m->p_paddr_valid) | |
5697 | p->p_paddr = filehdr->p_paddr; | |
5698 | } | |
5699 | } | |
5700 | ||
5701 | if (m->includes_phdrs) | |
5702 | { | |
5703 | if (!m->p_flags_valid) | |
5704 | p->p_flags |= PF_R; | |
5705 | p->p_filesz += actual * bed->s->sizeof_phdr; | |
5706 | p->p_memsz += actual * bed->s->sizeof_phdr; | |
5707 | if (!m->includes_filehdr) | |
5708 | { | |
5709 | if (p->p_type == PT_LOAD) | |
5710 | { | |
5711 | elf_elfheader (abfd)->e_phoff = p->p_offset; | |
5712 | if (m->count > 0) | |
5713 | { | |
5714 | p->p_vaddr -= off - p->p_offset; | |
5715 | if (!m->p_paddr_valid) | |
5716 | p->p_paddr -= off - p->p_offset; | |
5717 | } | |
5718 | } | |
5719 | else if (phdr_load_seg != NULL) | |
5720 | { | |
5721 | Elf_Internal_Phdr *phdr = phdrs + phdr_load_seg->idx; | |
5722 | bfd_vma phdr_off = 0; /* Octets. */ | |
5723 | if (phdr_load_seg->includes_filehdr) | |
5724 | phdr_off = bed->s->sizeof_ehdr; | |
5725 | p->p_vaddr = phdr->p_vaddr + phdr_off; | |
5726 | if (!m->p_paddr_valid) | |
5727 | p->p_paddr = phdr->p_paddr + phdr_off; | |
5728 | p->p_offset = phdr->p_offset + phdr_off; | |
5729 | } | |
5730 | else | |
5731 | p->p_offset = bed->s->sizeof_ehdr; | |
5732 | } | |
5733 | } | |
5734 | ||
5735 | if (p->p_type == PT_LOAD | |
5736 | || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)) | |
5737 | { | |
5738 | if (!m->includes_filehdr && !m->includes_phdrs) | |
5739 | { | |
5740 | p->p_offset = off; | |
5741 | if (no_contents) | |
5742 | { | |
5743 | /* Put meaningless p_offset for PT_LOAD segments | |
5744 | without file contents somewhere within the first | |
5745 | page, in an attempt to not point past EOF. */ | |
5746 | bfd_size_type align = maxpagesize; | |
5747 | if (align < p->p_align) | |
5748 | align = p->p_align; | |
5749 | if (align < 1) | |
5750 | align = 1; | |
5751 | p->p_offset = off % align; | |
5752 | } | |
5753 | } | |
5754 | else | |
5755 | { | |
5756 | file_ptr adjust; /* Octets. */ | |
5757 | ||
5758 | adjust = off - (p->p_offset + p->p_filesz); | |
5759 | if (!no_contents) | |
5760 | p->p_filesz += adjust; | |
5761 | p->p_memsz += adjust; | |
5762 | } | |
5763 | } | |
5764 | ||
5765 | /* Set up p_filesz, p_memsz, p_align and p_flags from the section | |
5766 | maps. Set filepos for sections in PT_LOAD segments, and in | |
5767 | core files, for sections in PT_NOTE segments. | |
5768 | assign_file_positions_for_non_load_sections will set filepos | |
5769 | for other sections and update p_filesz for other segments. */ | |
5770 | for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) | |
5771 | { | |
5772 | asection *sec; | |
5773 | bfd_size_type align; | |
5774 | Elf_Internal_Shdr *this_hdr; | |
5775 | ||
5776 | sec = *secpp; | |
5777 | this_hdr = &elf_section_data (sec)->this_hdr; | |
5778 | align = (bfd_size_type) 1 << bfd_section_alignment (sec); | |
5779 | ||
5780 | if ((p->p_type == PT_LOAD | |
5781 | || p->p_type == PT_TLS) | |
5782 | && (this_hdr->sh_type != SHT_NOBITS | |
5783 | || ((this_hdr->sh_flags & SHF_ALLOC) != 0 | |
5784 | && ((this_hdr->sh_flags & SHF_TLS) == 0 | |
5785 | || p->p_type == PT_TLS)))) | |
5786 | { | |
5787 | bfd_vma p_start = p->p_paddr; /* Octets. */ | |
5788 | bfd_vma p_end = p_start + p->p_memsz; /* Octets. */ | |
5789 | bfd_vma s_start = sec->lma * opb; /* Octets. */ | |
5790 | bfd_vma adjust = s_start - p_end; /* Octets. */ | |
5791 | ||
5792 | if (adjust != 0 | |
5793 | && (s_start < p_end | |
5794 | || p_end < p_start)) | |
5795 | { | |
5796 | _bfd_error_handler | |
5797 | /* xgettext:c-format */ | |
5798 | (_("%pB: section %pA lma %#" PRIx64 " adjusted to %#" PRIx64), | |
5799 | abfd, sec, (uint64_t) s_start / opb, | |
5800 | (uint64_t) p_end / opb); | |
5801 | adjust = 0; | |
5802 | sec->lma = p_end / opb; | |
5803 | } | |
5804 | p->p_memsz += adjust; | |
5805 | ||
5806 | if (p->p_type == PT_LOAD) | |
5807 | { | |
5808 | if (this_hdr->sh_type != SHT_NOBITS) | |
5809 | { | |
5810 | off_adjust = 0; | |
5811 | if (p->p_filesz + adjust < p->p_memsz) | |
5812 | { | |
5813 | /* We have a PROGBITS section following NOBITS ones. | |
5814 | Allocate file space for the NOBITS section(s) and | |
5815 | zero it. */ | |
5816 | adjust = p->p_memsz - p->p_filesz; | |
5817 | if (!write_zeros (abfd, off, adjust)) | |
5818 | return false; | |
5819 | } | |
5820 | } | |
5821 | /* We only adjust sh_offset in SHT_NOBITS sections | |
5822 | as would seem proper for their address when the | |
5823 | section is first in the segment. sh_offset | |
5824 | doesn't really have any significance for | |
5825 | SHT_NOBITS anyway, apart from a notional position | |
5826 | relative to other sections. Historically we | |
5827 | didn't bother with adjusting sh_offset and some | |
5828 | programs depend on it not being adjusted. See | |
5829 | pr12921 and pr25662. */ | |
5830 | if (this_hdr->sh_type != SHT_NOBITS || i == 0) | |
5831 | { | |
5832 | off += adjust; | |
5833 | if (this_hdr->sh_type == SHT_NOBITS) | |
5834 | off_adjust += adjust; | |
5835 | } | |
5836 | } | |
5837 | if (this_hdr->sh_type != SHT_NOBITS) | |
5838 | p->p_filesz += adjust; | |
5839 | } | |
5840 | ||
5841 | if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core) | |
5842 | { | |
5843 | /* The section at i == 0 is the one that actually contains | |
5844 | everything. */ | |
5845 | if (i == 0) | |
5846 | { | |
5847 | this_hdr->sh_offset = sec->filepos = off; | |
5848 | off += this_hdr->sh_size; | |
5849 | p->p_filesz = this_hdr->sh_size; | |
5850 | p->p_memsz = 0; | |
5851 | p->p_align = 1; | |
5852 | } | |
5853 | else | |
5854 | { | |
5855 | /* The rest are fake sections that shouldn't be written. */ | |
5856 | sec->filepos = 0; | |
5857 | sec->size = 0; | |
5858 | sec->flags = 0; | |
5859 | continue; | |
5860 | } | |
5861 | } | |
5862 | else | |
5863 | { | |
5864 | if (p->p_type == PT_LOAD) | |
5865 | { | |
5866 | this_hdr->sh_offset = sec->filepos = off; | |
5867 | if (this_hdr->sh_type != SHT_NOBITS) | |
5868 | off += this_hdr->sh_size; | |
5869 | } | |
5870 | else if (this_hdr->sh_type == SHT_NOBITS | |
5871 | && (this_hdr->sh_flags & SHF_TLS) != 0 | |
5872 | && this_hdr->sh_offset == 0) | |
5873 | { | |
5874 | /* This is a .tbss section that didn't get a PT_LOAD. | |
5875 | (See _bfd_elf_map_sections_to_segments "Create a | |
5876 | final PT_LOAD".) Set sh_offset to the value it | |
5877 | would have if we had created a zero p_filesz and | |
5878 | p_memsz PT_LOAD header for the section. This | |
5879 | also makes the PT_TLS header have the same | |
5880 | p_offset value. */ | |
5881 | bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr, | |
5882 | off, align); | |
5883 | this_hdr->sh_offset = sec->filepos = off + adjust; | |
5884 | } | |
5885 | ||
5886 | if (this_hdr->sh_type != SHT_NOBITS) | |
5887 | { | |
5888 | p->p_filesz += this_hdr->sh_size; | |
5889 | /* A load section without SHF_ALLOC is something like | |
5890 | a note section in a PT_NOTE segment. These take | |
5891 | file space but are not loaded into memory. */ | |
5892 | if ((this_hdr->sh_flags & SHF_ALLOC) != 0) | |
5893 | p->p_memsz += this_hdr->sh_size; | |
5894 | } | |
5895 | else if ((this_hdr->sh_flags & SHF_ALLOC) != 0) | |
5896 | { | |
5897 | if (p->p_type == PT_TLS) | |
5898 | p->p_memsz += this_hdr->sh_size; | |
5899 | ||
5900 | /* .tbss is special. It doesn't contribute to p_memsz of | |
5901 | normal segments. */ | |
5902 | else if ((this_hdr->sh_flags & SHF_TLS) == 0) | |
5903 | p->p_memsz += this_hdr->sh_size; | |
5904 | } | |
5905 | ||
5906 | if (align > p->p_align | |
5907 | && !m->p_align_valid | |
5908 | && (p->p_type != PT_LOAD | |
5909 | || (abfd->flags & D_PAGED) == 0)) | |
5910 | p->p_align = align; | |
5911 | } | |
5912 | ||
5913 | if (!m->p_flags_valid) | |
5914 | { | |
5915 | p->p_flags |= PF_R; | |
5916 | if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0) | |
5917 | p->p_flags |= PF_X; | |
5918 | if ((this_hdr->sh_flags & SHF_WRITE) != 0) | |
5919 | p->p_flags |= PF_W; | |
5920 | } | |
5921 | } | |
5922 | ||
5923 | off -= off_adjust; | |
5924 | ||
5925 | /* PR ld/20815 - Check that the program header segment, if | |
5926 | present, will be loaded into memory. */ | |
5927 | if (p->p_type == PT_PHDR | |
5928 | && phdr_load_seg == NULL | |
5929 | && !(bed->elf_backend_allow_non_load_phdr != NULL | |
5930 | && bed->elf_backend_allow_non_load_phdr (abfd, phdrs, alloc))) | |
5931 | { | |
5932 | /* The fix for this error is usually to edit the linker script being | |
5933 | used and set up the program headers manually. Either that or | |
5934 | leave room for the headers at the start of the SECTIONS. */ | |
5935 | _bfd_error_handler (_("%pB: error: PHDR segment not covered" | |
5936 | " by LOAD segment"), | |
5937 | abfd); | |
5938 | if (link_info == NULL) | |
5939 | return false; | |
5940 | /* Arrange for the linker to exit with an error, deleting | |
5941 | the output file unless --noinhibit-exec is given. */ | |
5942 | link_info->callbacks->info ("%X"); | |
5943 | } | |
5944 | ||
5945 | /* Check that all sections are in a PT_LOAD segment. | |
5946 | Don't check funky gdb generated core files. */ | |
5947 | if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core) | |
5948 | { | |
5949 | bool check_vma = true; | |
5950 | ||
5951 | for (i = 1; i < m->count; i++) | |
5952 | if (m->sections[i]->vma == m->sections[i - 1]->vma | |
5953 | && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i]) | |
5954 | ->this_hdr), p) != 0 | |
5955 | && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1]) | |
5956 | ->this_hdr), p) != 0) | |
5957 | { | |
5958 | /* Looks like we have overlays packed into the segment. */ | |
5959 | check_vma = false; | |
5960 | break; | |
5961 | } | |
5962 | ||
5963 | for (i = 0; i < m->count; i++) | |
5964 | { | |
5965 | Elf_Internal_Shdr *this_hdr; | |
5966 | asection *sec; | |
5967 | ||
5968 | sec = m->sections[i]; | |
5969 | this_hdr = &(elf_section_data(sec)->this_hdr); | |
5970 | if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0) | |
5971 | && !ELF_TBSS_SPECIAL (this_hdr, p)) | |
5972 | { | |
5973 | _bfd_error_handler | |
5974 | /* xgettext:c-format */ | |
5975 | (_("%pB: section `%pA' can't be allocated in segment %d"), | |
5976 | abfd, sec, j); | |
5977 | print_segment_map (m); | |
5978 | } | |
5979 | } | |
5980 | } | |
5981 | } | |
5982 | ||
5983 | elf_next_file_pos (abfd) = off; | |
5984 | ||
5985 | if (link_info != NULL | |
5986 | && phdr_load_seg != NULL | |
5987 | && phdr_load_seg->includes_filehdr) | |
5988 | { | |
5989 | /* There is a segment that contains both the file headers and the | |
5990 | program headers, so provide a symbol __ehdr_start pointing there. | |
5991 | A program can use this to examine itself robustly. */ | |
5992 | ||
5993 | struct elf_link_hash_entry *hash | |
5994 | = elf_link_hash_lookup (elf_hash_table (link_info), "__ehdr_start", | |
5995 | false, false, true); | |
5996 | /* If the symbol was referenced and not defined, define it. */ | |
5997 | if (hash != NULL | |
5998 | && (hash->root.type == bfd_link_hash_new | |
5999 | || hash->root.type == bfd_link_hash_undefined | |
6000 | || hash->root.type == bfd_link_hash_undefweak | |
6001 | || hash->root.type == bfd_link_hash_common)) | |
6002 | { | |
6003 | asection *s = NULL; | |
6004 | bfd_vma filehdr_vaddr = phdrs[phdr_load_seg->idx].p_vaddr / opb; | |
6005 | ||
6006 | if (phdr_load_seg->count != 0) | |
6007 | /* The segment contains sections, so use the first one. */ | |
6008 | s = phdr_load_seg->sections[0]; | |
6009 | else | |
6010 | /* Use the first (i.e. lowest-addressed) section in any segment. */ | |
6011 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) | |
6012 | if (m->p_type == PT_LOAD && m->count != 0) | |
6013 | { | |
6014 | s = m->sections[0]; | |
6015 | break; | |
6016 | } | |
6017 | ||
6018 | if (s != NULL) | |
6019 | { | |
6020 | hash->root.u.def.value = filehdr_vaddr - s->vma; | |
6021 | hash->root.u.def.section = s; | |
6022 | } | |
6023 | else | |
6024 | { | |
6025 | hash->root.u.def.value = filehdr_vaddr; | |
6026 | hash->root.u.def.section = bfd_abs_section_ptr; | |
6027 | } | |
6028 | ||
6029 | hash->root.type = bfd_link_hash_defined; | |
6030 | hash->def_regular = 1; | |
6031 | hash->non_elf = 0; | |
6032 | } | |
6033 | } | |
6034 | ||
6035 | return true; | |
6036 | } | |
6037 | ||
6038 | /* Determine if a bfd is a debuginfo file. Unfortunately there | |
6039 | is no defined method for detecting such files, so we have to | |
6040 | use heuristics instead. */ | |
6041 | ||
6042 | bool | |
6043 | is_debuginfo_file (bfd *abfd) | |
6044 | { | |
6045 | if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
6046 | return false; | |
6047 | ||
6048 | Elf_Internal_Shdr **start_headers = elf_elfsections (abfd); | |
6049 | Elf_Internal_Shdr **end_headers = start_headers + elf_numsections (abfd); | |
6050 | Elf_Internal_Shdr **headerp; | |
6051 | ||
6052 | for (headerp = start_headers; headerp < end_headers; headerp ++) | |
6053 | { | |
6054 | Elf_Internal_Shdr *header = * headerp; | |
6055 | ||
6056 | /* Debuginfo files do not have any allocated SHT_PROGBITS sections. | |
6057 | The only allocated sections are SHT_NOBITS or SHT_NOTES. */ | |
6058 | if ((header->sh_flags & SHF_ALLOC) == SHF_ALLOC | |
6059 | && header->sh_type != SHT_NOBITS | |
6060 | && header->sh_type != SHT_NOTE) | |
6061 | return false; | |
6062 | } | |
6063 | ||
6064 | return true; | |
6065 | } | |
6066 | ||
6067 | /* Assign file positions for the other sections, except for compressed debugging | |
6068 | and other sections assigned in _bfd_elf_assign_file_positions_for_non_load(). */ | |
6069 | ||
6070 | static bool | |
6071 | assign_file_positions_for_non_load_sections (bfd *abfd, | |
6072 | struct bfd_link_info *link_info) | |
6073 | { | |
6074 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6075 | Elf_Internal_Shdr **i_shdrpp; | |
6076 | Elf_Internal_Shdr **hdrpp, **end_hdrpp; | |
6077 | Elf_Internal_Phdr *phdrs; | |
6078 | Elf_Internal_Phdr *p; | |
6079 | struct elf_segment_map *m; | |
6080 | file_ptr off; | |
6081 | unsigned int opb = bfd_octets_per_byte (abfd, NULL); | |
6082 | bfd_vma maxpagesize; | |
6083 | ||
6084 | if (link_info != NULL) | |
6085 | maxpagesize = link_info->maxpagesize; | |
6086 | else | |
6087 | maxpagesize = bed->maxpagesize; | |
6088 | i_shdrpp = elf_elfsections (abfd); | |
6089 | end_hdrpp = i_shdrpp + elf_numsections (abfd); | |
6090 | off = elf_next_file_pos (abfd); | |
6091 | for (hdrpp = i_shdrpp + 1; hdrpp < end_hdrpp; hdrpp++) | |
6092 | { | |
6093 | Elf_Internal_Shdr *hdr; | |
6094 | ||
6095 | hdr = *hdrpp; | |
6096 | if (hdr->bfd_section != NULL | |
6097 | && (hdr->bfd_section->filepos != 0 | |
6098 | || (hdr->sh_type == SHT_NOBITS | |
6099 | && hdr->contents == NULL))) | |
6100 | BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos); | |
6101 | else if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
6102 | { | |
6103 | if (hdr->sh_size != 0 | |
6104 | /* PR 24717 - debuginfo files are known to be not strictly | |
6105 | compliant with the ELF standard. In particular they often | |
6106 | have .note.gnu.property sections that are outside of any | |
6107 | loadable segment. This is not a problem for such files, | |
6108 | so do not warn about them. */ | |
6109 | && ! is_debuginfo_file (abfd)) | |
6110 | _bfd_error_handler | |
6111 | /* xgettext:c-format */ | |
6112 | (_("%pB: warning: allocated section `%s' not in segment"), | |
6113 | abfd, | |
6114 | (hdr->bfd_section == NULL | |
6115 | ? "*unknown*" | |
6116 | : hdr->bfd_section->name)); | |
6117 | /* We don't need to page align empty sections. */ | |
6118 | if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0) | |
6119 | off += vma_page_aligned_bias (hdr->sh_addr, off, | |
6120 | maxpagesize); | |
6121 | else | |
6122 | off += vma_page_aligned_bias (hdr->sh_addr, off, | |
6123 | hdr->sh_addralign); | |
6124 | off = _bfd_elf_assign_file_position_for_section (hdr, off, | |
6125 | false); | |
6126 | } | |
6127 | else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
6128 | && hdr->bfd_section == NULL) | |
6129 | /* We don't know the offset of these sections yet: their size has | |
6130 | not been decided. */ | |
6131 | || (hdr->bfd_section != NULL | |
6132 | && (hdr->bfd_section->flags & SEC_ELF_COMPRESS | |
6133 | || (bfd_section_is_ctf (hdr->bfd_section) | |
6134 | && abfd->is_linker_output))) | |
6135 | || hdr == i_shdrpp[elf_onesymtab (abfd)] | |
6136 | || (elf_symtab_shndx_list (abfd) != NULL | |
6137 | && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx]) | |
6138 | || hdr == i_shdrpp[elf_strtab_sec (abfd)] | |
6139 | || hdr == i_shdrpp[elf_shstrtab_sec (abfd)]) | |
6140 | hdr->sh_offset = -1; | |
6141 | else | |
6142 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
6143 | } | |
6144 | elf_next_file_pos (abfd) = off; | |
6145 | ||
6146 | /* Now that we have set the section file positions, we can set up | |
6147 | the file positions for the non PT_LOAD segments. */ | |
6148 | phdrs = elf_tdata (abfd)->phdr; | |
6149 | for (m = elf_seg_map (abfd), p = phdrs; m != NULL; m = m->next, p++) | |
6150 | { | |
6151 | if (p->p_type == PT_GNU_RELRO) | |
6152 | { | |
6153 | bfd_vma start, end; /* Bytes. */ | |
6154 | bool ok; | |
6155 | ||
6156 | if (link_info != NULL) | |
6157 | { | |
6158 | /* During linking the range of the RELRO segment is passed | |
6159 | in link_info. Note that there may be padding between | |
6160 | relro_start and the first RELRO section. */ | |
6161 | start = link_info->relro_start; | |
6162 | end = link_info->relro_end; | |
6163 | } | |
6164 | else if (m->count != 0) | |
6165 | { | |
6166 | if (!m->p_size_valid) | |
6167 | abort (); | |
6168 | start = m->sections[0]->vma; | |
6169 | end = start + m->p_size / opb; | |
6170 | } | |
6171 | else | |
6172 | { | |
6173 | start = 0; | |
6174 | end = 0; | |
6175 | } | |
6176 | ||
6177 | ok = false; | |
6178 | if (start < end) | |
6179 | { | |
6180 | struct elf_segment_map *lm; | |
6181 | const Elf_Internal_Phdr *lp; | |
6182 | unsigned int i; | |
6183 | ||
6184 | /* Find a LOAD segment containing a section in the RELRO | |
6185 | segment. */ | |
6186 | for (lm = elf_seg_map (abfd), lp = phdrs; | |
6187 | lm != NULL; | |
6188 | lm = lm->next, lp++) | |
6189 | { | |
6190 | if (lp->p_type == PT_LOAD | |
6191 | && lm->count != 0 | |
6192 | && (lm->sections[lm->count - 1]->vma | |
6193 | + (!IS_TBSS (lm->sections[lm->count - 1]) | |
6194 | ? lm->sections[lm->count - 1]->size / opb | |
6195 | : 0)) > start | |
6196 | && lm->sections[0]->vma < end) | |
6197 | break; | |
6198 | } | |
6199 | ||
6200 | if (lm != NULL) | |
6201 | { | |
6202 | /* Find the section starting the RELRO segment. */ | |
6203 | for (i = 0; i < lm->count; i++) | |
6204 | { | |
6205 | asection *s = lm->sections[i]; | |
6206 | if (s->vma >= start | |
6207 | && s->vma < end | |
6208 | && s->size != 0) | |
6209 | break; | |
6210 | } | |
6211 | ||
6212 | if (i < lm->count) | |
6213 | { | |
6214 | p->p_vaddr = lm->sections[i]->vma * opb; | |
6215 | p->p_paddr = lm->sections[i]->lma * opb; | |
6216 | p->p_offset = lm->sections[i]->filepos; | |
6217 | p->p_memsz = end * opb - p->p_vaddr; | |
6218 | p->p_filesz = p->p_memsz; | |
6219 | ||
6220 | /* The RELRO segment typically ends a few bytes | |
6221 | into .got.plt but other layouts are possible. | |
6222 | In cases where the end does not match any | |
6223 | loaded section (for instance is in file | |
6224 | padding), trim p_filesz back to correspond to | |
6225 | the end of loaded section contents. */ | |
6226 | if (p->p_filesz > lp->p_vaddr + lp->p_filesz - p->p_vaddr) | |
6227 | p->p_filesz = lp->p_vaddr + lp->p_filesz - p->p_vaddr; | |
6228 | ||
6229 | /* Preserve the alignment and flags if they are | |
6230 | valid. The gold linker generates RW/4 for | |
6231 | the PT_GNU_RELRO section. It is better for | |
6232 | objcopy/strip to honor these attributes | |
6233 | otherwise gdb will choke when using separate | |
6234 | debug files. */ | |
6235 | if (!m->p_align_valid) | |
6236 | p->p_align = 1; | |
6237 | if (!m->p_flags_valid) | |
6238 | p->p_flags = PF_R; | |
6239 | ok = true; | |
6240 | } | |
6241 | } | |
6242 | } | |
6243 | ||
6244 | if (!ok) | |
6245 | { | |
6246 | if (link_info != NULL) | |
6247 | _bfd_error_handler | |
6248 | (_("%pB: warning: unable to allocate any sections to PT_GNU_RELRO segment"), | |
6249 | abfd); | |
6250 | memset (p, 0, sizeof *p); | |
6251 | } | |
6252 | } | |
6253 | else if (p->p_type == PT_GNU_STACK) | |
6254 | { | |
6255 | if (m->p_size_valid) | |
6256 | p->p_memsz = m->p_size; | |
6257 | } | |
6258 | else if (m->count != 0) | |
6259 | { | |
6260 | unsigned int i; | |
6261 | ||
6262 | if (p->p_type != PT_LOAD | |
6263 | && (p->p_type != PT_NOTE | |
6264 | || bfd_get_format (abfd) != bfd_core)) | |
6265 | { | |
6266 | /* A user specified segment layout may include a PHDR | |
6267 | segment that overlaps with a LOAD segment... */ | |
6268 | if (p->p_type == PT_PHDR) | |
6269 | { | |
6270 | m->count = 0; | |
6271 | continue; | |
6272 | } | |
6273 | ||
6274 | if (m->includes_filehdr || m->includes_phdrs) | |
6275 | { | |
6276 | /* PR 17512: file: 2195325e. */ | |
6277 | _bfd_error_handler | |
6278 | (_("%pB: error: non-load segment %d includes file header " | |
6279 | "and/or program header"), | |
6280 | abfd, (int) (p - phdrs)); | |
6281 | return false; | |
6282 | } | |
6283 | ||
6284 | p->p_filesz = 0; | |
6285 | p->p_offset = m->sections[0]->filepos; | |
6286 | for (i = m->count; i-- != 0;) | |
6287 | { | |
6288 | asection *sect = m->sections[i]; | |
6289 | Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr; | |
6290 | if (hdr->sh_type != SHT_NOBITS) | |
6291 | { | |
6292 | p->p_filesz = sect->filepos - p->p_offset + hdr->sh_size; | |
6293 | /* NB: p_memsz of the loadable PT_NOTE segment | |
6294 | should be the same as p_filesz. */ | |
6295 | if (p->p_type == PT_NOTE | |
6296 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
6297 | p->p_memsz = p->p_filesz; | |
6298 | break; | |
6299 | } | |
6300 | } | |
6301 | } | |
6302 | } | |
6303 | } | |
6304 | ||
6305 | return true; | |
6306 | } | |
6307 | ||
6308 | static elf_section_list * | |
6309 | find_section_in_list (unsigned int i, elf_section_list * list) | |
6310 | { | |
6311 | for (;list != NULL; list = list->next) | |
6312 | if (list->ndx == i) | |
6313 | break; | |
6314 | return list; | |
6315 | } | |
6316 | ||
6317 | /* Work out the file positions of all the sections. This is called by | |
6318 | _bfd_elf_compute_section_file_positions. All the section sizes and | |
6319 | VMAs must be known before this is called. | |
6320 | ||
6321 | Reloc sections come in two flavours: Those processed specially as | |
6322 | "side-channel" data attached to a section to which they apply, and those that | |
6323 | bfd doesn't process as relocations. The latter sort are stored in a normal | |
6324 | bfd section by bfd_section_from_shdr. We don't consider the former sort | |
6325 | here, unless they form part of the loadable image. Reloc sections not | |
6326 | assigned here (and compressed debugging sections and CTF sections which | |
6327 | nothing else in the file can rely upon) will be handled later by | |
6328 | assign_file_positions_for_relocs. | |
6329 | ||
6330 | We also don't set the positions of the .symtab and .strtab here. */ | |
6331 | ||
6332 | static bool | |
6333 | assign_file_positions_except_relocs (bfd *abfd, | |
6334 | struct bfd_link_info *link_info) | |
6335 | { | |
6336 | struct elf_obj_tdata *tdata = elf_tdata (abfd); | |
6337 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
6338 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6339 | unsigned int alloc; | |
6340 | ||
6341 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 | |
6342 | && bfd_get_format (abfd) != bfd_core) | |
6343 | { | |
6344 | Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); | |
6345 | unsigned int num_sec = elf_numsections (abfd); | |
6346 | Elf_Internal_Shdr **hdrpp; | |
6347 | unsigned int i; | |
6348 | file_ptr off; | |
6349 | ||
6350 | /* Start after the ELF header. */ | |
6351 | off = i_ehdrp->e_ehsize; | |
6352 | ||
6353 | /* We are not creating an executable, which means that we are | |
6354 | not creating a program header, and that the actual order of | |
6355 | the sections in the file is unimportant. */ | |
6356 | for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++) | |
6357 | { | |
6358 | Elf_Internal_Shdr *hdr; | |
6359 | ||
6360 | hdr = *hdrpp; | |
6361 | if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
6362 | && hdr->bfd_section == NULL) | |
6363 | /* Do not assign offsets for these sections yet: we don't know | |
6364 | their sizes. */ | |
6365 | || (hdr->bfd_section != NULL | |
6366 | && (hdr->bfd_section->flags & SEC_ELF_COMPRESS | |
6367 | || (bfd_section_is_ctf (hdr->bfd_section) | |
6368 | && abfd->is_linker_output))) | |
6369 | || i == elf_onesymtab (abfd) | |
6370 | || (elf_symtab_shndx_list (abfd) != NULL | |
6371 | && hdr == i_shdrpp[elf_symtab_shndx_list (abfd)->ndx]) | |
6372 | || i == elf_strtab_sec (abfd) | |
6373 | || i == elf_shstrtab_sec (abfd)) | |
6374 | { | |
6375 | hdr->sh_offset = -1; | |
6376 | } | |
6377 | else | |
6378 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
6379 | } | |
6380 | ||
6381 | elf_next_file_pos (abfd) = off; | |
6382 | elf_program_header_size (abfd) = 0; | |
6383 | } | |
6384 | else | |
6385 | { | |
6386 | /* Assign file positions for the loaded sections based on the | |
6387 | assignment of sections to segments. */ | |
6388 | if (!assign_file_positions_for_load_sections (abfd, link_info)) | |
6389 | return false; | |
6390 | ||
6391 | /* And for non-load sections. */ | |
6392 | if (!assign_file_positions_for_non_load_sections (abfd, link_info)) | |
6393 | return false; | |
6394 | } | |
6395 | ||
6396 | if (!(*bed->elf_backend_modify_headers) (abfd, link_info)) | |
6397 | return false; | |
6398 | ||
6399 | /* Write out the program headers. */ | |
6400 | alloc = i_ehdrp->e_phnum; | |
6401 | if (alloc != 0) | |
6402 | { | |
6403 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) != 0 | |
6404 | || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0) | |
6405 | return false; | |
6406 | } | |
6407 | ||
6408 | return true; | |
6409 | } | |
6410 | ||
6411 | bool | |
6412 | _bfd_elf_init_file_header (bfd *abfd, | |
6413 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
6414 | { | |
6415 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */ | |
6416 | struct elf_strtab_hash *shstrtab; | |
6417 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6418 | ||
6419 | i_ehdrp = elf_elfheader (abfd); | |
6420 | ||
6421 | shstrtab = _bfd_elf_strtab_init (); | |
6422 | if (shstrtab == NULL) | |
6423 | return false; | |
6424 | ||
6425 | elf_shstrtab (abfd) = shstrtab; | |
6426 | ||
6427 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; | |
6428 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
6429 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
6430 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
6431 | ||
6432 | i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass; | |
6433 | i_ehdrp->e_ident[EI_DATA] = | |
6434 | bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB; | |
6435 | i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current; | |
6436 | ||
6437 | if ((abfd->flags & DYNAMIC) != 0) | |
6438 | i_ehdrp->e_type = ET_DYN; | |
6439 | else if ((abfd->flags & EXEC_P) != 0) | |
6440 | i_ehdrp->e_type = ET_EXEC; | |
6441 | else if (bfd_get_format (abfd) == bfd_core) | |
6442 | i_ehdrp->e_type = ET_CORE; | |
6443 | else | |
6444 | i_ehdrp->e_type = ET_REL; | |
6445 | ||
6446 | switch (bfd_get_arch (abfd)) | |
6447 | { | |
6448 | case bfd_arch_unknown: | |
6449 | i_ehdrp->e_machine = EM_NONE; | |
6450 | break; | |
6451 | ||
6452 | /* There used to be a long list of cases here, each one setting | |
6453 | e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE | |
6454 | in the corresponding bfd definition. To avoid duplication, | |
6455 | the switch was removed. Machines that need special handling | |
6456 | can generally do it in elf_backend_final_write_processing(), | |
6457 | unless they need the information earlier than the final write. | |
6458 | Such need can generally be supplied by replacing the tests for | |
6459 | e_machine with the conditions used to determine it. */ | |
6460 | default: | |
6461 | i_ehdrp->e_machine = bed->elf_machine_code; | |
6462 | } | |
6463 | ||
6464 | i_ehdrp->e_version = bed->s->ev_current; | |
6465 | i_ehdrp->e_ehsize = bed->s->sizeof_ehdr; | |
6466 | ||
6467 | /* No program header, for now. */ | |
6468 | i_ehdrp->e_phoff = 0; | |
6469 | i_ehdrp->e_phentsize = 0; | |
6470 | i_ehdrp->e_phnum = 0; | |
6471 | ||
6472 | /* Each bfd section is section header entry. */ | |
6473 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
6474 | i_ehdrp->e_shentsize = bed->s->sizeof_shdr; | |
6475 | ||
6476 | elf_tdata (abfd)->symtab_hdr.sh_name = | |
6477 | (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", false); | |
6478 | elf_tdata (abfd)->strtab_hdr.sh_name = | |
6479 | (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", false); | |
6480 | elf_tdata (abfd)->shstrtab_hdr.sh_name = | |
6481 | (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", false); | |
6482 | if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
6483 | || elf_tdata (abfd)->strtab_hdr.sh_name == (unsigned int) -1 | |
6484 | || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) | |
6485 | return false; | |
6486 | ||
6487 | return true; | |
6488 | } | |
6489 | ||
6490 | /* Set e_type in ELF header to ET_EXEC for -pie -Ttext-segment=. | |
6491 | ||
6492 | FIXME: We used to have code here to sort the PT_LOAD segments into | |
6493 | ascending order, as per the ELF spec. But this breaks some programs, | |
6494 | including the Linux kernel. But really either the spec should be | |
6495 | changed or the programs updated. */ | |
6496 | ||
6497 | bool | |
6498 | _bfd_elf_modify_headers (bfd *obfd, struct bfd_link_info *link_info) | |
6499 | { | |
6500 | if (link_info != NULL && bfd_link_pie (link_info)) | |
6501 | { | |
6502 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (obfd); | |
6503 | unsigned int num_segments = i_ehdrp->e_phnum; | |
6504 | struct elf_obj_tdata *tdata = elf_tdata (obfd); | |
6505 | Elf_Internal_Phdr *segment = tdata->phdr; | |
6506 | Elf_Internal_Phdr *end_segment = &segment[num_segments]; | |
6507 | ||
6508 | /* Find the lowest p_vaddr in PT_LOAD segments. */ | |
6509 | bfd_vma p_vaddr = (bfd_vma) -1; | |
6510 | for (; segment < end_segment; segment++) | |
6511 | if (segment->p_type == PT_LOAD && p_vaddr > segment->p_vaddr) | |
6512 | p_vaddr = segment->p_vaddr; | |
6513 | ||
6514 | /* Set e_type to ET_EXEC if the lowest p_vaddr in PT_LOAD | |
6515 | segments is non-zero. */ | |
6516 | if (p_vaddr) | |
6517 | i_ehdrp->e_type = ET_EXEC; | |
6518 | } | |
6519 | return true; | |
6520 | } | |
6521 | ||
6522 | /* Assign file positions for all the reloc sections which are not part | |
6523 | of the loadable file image, and the file position of section headers. */ | |
6524 | ||
6525 | static bool | |
6526 | _bfd_elf_assign_file_positions_for_non_load (bfd *abfd) | |
6527 | { | |
6528 | file_ptr off; | |
6529 | Elf_Internal_Shdr **shdrpp, **end_shdrpp; | |
6530 | Elf_Internal_Shdr *shdrp; | |
6531 | Elf_Internal_Ehdr *i_ehdrp; | |
6532 | const struct elf_backend_data *bed; | |
6533 | ||
6534 | off = elf_next_file_pos (abfd); | |
6535 | ||
6536 | shdrpp = elf_elfsections (abfd); | |
6537 | end_shdrpp = shdrpp + elf_numsections (abfd); | |
6538 | for (shdrpp++; shdrpp < end_shdrpp; shdrpp++) | |
6539 | { | |
6540 | shdrp = *shdrpp; | |
6541 | if (shdrp->sh_offset == -1) | |
6542 | { | |
6543 | asection *sec = shdrp->bfd_section; | |
6544 | bool is_rel = (shdrp->sh_type == SHT_REL | |
6545 | || shdrp->sh_type == SHT_RELA); | |
6546 | bool is_ctf = sec && bfd_section_is_ctf (sec); | |
6547 | if (is_rel | |
6548 | || is_ctf | |
6549 | || (sec != NULL && (sec->flags & SEC_ELF_COMPRESS))) | |
6550 | { | |
6551 | if (!is_rel && !is_ctf) | |
6552 | { | |
6553 | const char *name = sec->name; | |
6554 | struct bfd_elf_section_data *d; | |
6555 | ||
6556 | /* Compress DWARF debug sections. */ | |
6557 | if (!bfd_compress_section (abfd, sec, | |
6558 | shdrp->contents)) | |
6559 | return false; | |
6560 | ||
6561 | if (sec->compress_status == COMPRESS_SECTION_DONE | |
6562 | && (abfd->flags & BFD_COMPRESS_GABI) == 0) | |
6563 | { | |
6564 | /* If section is compressed with zlib-gnu, convert | |
6565 | section name from .debug_* to .zdebug_*. */ | |
6566 | char *new_name | |
6567 | = convert_debug_to_zdebug (abfd, name); | |
6568 | if (new_name == NULL) | |
6569 | return false; | |
6570 | name = new_name; | |
6571 | } | |
6572 | /* Add section name to section name section. */ | |
6573 | if (shdrp->sh_name != (unsigned int) -1) | |
6574 | abort (); | |
6575 | shdrp->sh_name | |
6576 | = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), | |
6577 | name, false); | |
6578 | d = elf_section_data (sec); | |
6579 | ||
6580 | /* Add reloc section name to section name section. */ | |
6581 | if (d->rel.hdr | |
6582 | && !_bfd_elf_set_reloc_sh_name (abfd, | |
6583 | d->rel.hdr, | |
6584 | name, false)) | |
6585 | return false; | |
6586 | if (d->rela.hdr | |
6587 | && !_bfd_elf_set_reloc_sh_name (abfd, | |
6588 | d->rela.hdr, | |
6589 | name, true)) | |
6590 | return false; | |
6591 | ||
6592 | /* Update section size and contents. */ | |
6593 | shdrp->sh_size = sec->size; | |
6594 | shdrp->contents = sec->contents; | |
6595 | shdrp->bfd_section->contents = NULL; | |
6596 | } | |
6597 | else if (is_ctf) | |
6598 | { | |
6599 | /* Update section size and contents. */ | |
6600 | shdrp->sh_size = sec->size; | |
6601 | shdrp->contents = sec->contents; | |
6602 | } | |
6603 | ||
6604 | off = _bfd_elf_assign_file_position_for_section (shdrp, | |
6605 | off, | |
6606 | true); | |
6607 | } | |
6608 | } | |
6609 | } | |
6610 | ||
6611 | /* Place section name section after DWARF debug sections have been | |
6612 | compressed. */ | |
6613 | _bfd_elf_strtab_finalize (elf_shstrtab (abfd)); | |
6614 | shdrp = &elf_tdata (abfd)->shstrtab_hdr; | |
6615 | shdrp->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd)); | |
6616 | off = _bfd_elf_assign_file_position_for_section (shdrp, off, true); | |
6617 | ||
6618 | /* Place the section headers. */ | |
6619 | i_ehdrp = elf_elfheader (abfd); | |
6620 | bed = get_elf_backend_data (abfd); | |
6621 | off = align_file_position (off, 1 << bed->s->log_file_align); | |
6622 | i_ehdrp->e_shoff = off; | |
6623 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
6624 | elf_next_file_pos (abfd) = off; | |
6625 | ||
6626 | return true; | |
6627 | } | |
6628 | ||
6629 | bool | |
6630 | _bfd_elf_write_object_contents (bfd *abfd) | |
6631 | { | |
6632 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
6633 | Elf_Internal_Shdr **i_shdrp; | |
6634 | bool failed; | |
6635 | unsigned int count, num_sec; | |
6636 | struct elf_obj_tdata *t; | |
6637 | ||
6638 | if (! abfd->output_has_begun | |
6639 | && ! _bfd_elf_compute_section_file_positions (abfd, NULL)) | |
6640 | return false; | |
6641 | /* Do not rewrite ELF data when the BFD has been opened for update. | |
6642 | abfd->output_has_begun was set to TRUE on opening, so creation of new | |
6643 | sections, and modification of existing section sizes was restricted. | |
6644 | This means the ELF header, program headers and section headers can't have | |
6645 | changed. | |
6646 | If the contents of any sections has been modified, then those changes have | |
6647 | already been written to the BFD. */ | |
6648 | else if (abfd->direction == both_direction) | |
6649 | { | |
6650 | BFD_ASSERT (abfd->output_has_begun); | |
6651 | return true; | |
6652 | } | |
6653 | ||
6654 | i_shdrp = elf_elfsections (abfd); | |
6655 | ||
6656 | failed = false; | |
6657 | bfd_map_over_sections (abfd, bed->s->write_relocs, &failed); | |
6658 | if (failed) | |
6659 | return false; | |
6660 | ||
6661 | if (!_bfd_elf_assign_file_positions_for_non_load (abfd)) | |
6662 | return false; | |
6663 | ||
6664 | /* After writing the headers, we need to write the sections too... */ | |
6665 | num_sec = elf_numsections (abfd); | |
6666 | for (count = 1; count < num_sec; count++) | |
6667 | { | |
6668 | i_shdrp[count]->sh_name | |
6669 | = _bfd_elf_strtab_offset (elf_shstrtab (abfd), | |
6670 | i_shdrp[count]->sh_name); | |
6671 | if (bed->elf_backend_section_processing) | |
6672 | if (!(*bed->elf_backend_section_processing) (abfd, i_shdrp[count])) | |
6673 | return false; | |
6674 | if (i_shdrp[count]->contents) | |
6675 | { | |
6676 | bfd_size_type amt = i_shdrp[count]->sh_size; | |
6677 | ||
6678 | if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 | |
6679 | || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt) | |
6680 | return false; | |
6681 | } | |
6682 | } | |
6683 | ||
6684 | /* Write out the section header names. */ | |
6685 | t = elf_tdata (abfd); | |
6686 | if (elf_shstrtab (abfd) != NULL | |
6687 | && (bfd_seek (abfd, t->shstrtab_hdr.sh_offset, SEEK_SET) != 0 | |
6688 | || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))) | |
6689 | return false; | |
6690 | ||
6691 | if (!(*bed->elf_backend_final_write_processing) (abfd)) | |
6692 | return false; | |
6693 | ||
6694 | if (!bed->s->write_shdrs_and_ehdr (abfd)) | |
6695 | return false; | |
6696 | ||
6697 | /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */ | |
6698 | if (t->o->build_id.after_write_object_contents != NULL) | |
6699 | return (*t->o->build_id.after_write_object_contents) (abfd); | |
6700 | ||
6701 | return true; | |
6702 | } | |
6703 | ||
6704 | bool | |
6705 | _bfd_elf_write_corefile_contents (bfd *abfd) | |
6706 | { | |
6707 | /* Hopefully this can be done just like an object file. */ | |
6708 | return _bfd_elf_write_object_contents (abfd); | |
6709 | } | |
6710 | ||
6711 | /* Given a section, search the header to find them. */ | |
6712 | ||
6713 | unsigned int | |
6714 | _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect) | |
6715 | { | |
6716 | const struct elf_backend_data *bed; | |
6717 | unsigned int sec_index; | |
6718 | ||
6719 | if (elf_section_data (asect) != NULL | |
6720 | && elf_section_data (asect)->this_idx != 0) | |
6721 | return elf_section_data (asect)->this_idx; | |
6722 | ||
6723 | if (bfd_is_abs_section (asect)) | |
6724 | sec_index = SHN_ABS; | |
6725 | else if (bfd_is_com_section (asect)) | |
6726 | sec_index = SHN_COMMON; | |
6727 | else if (bfd_is_und_section (asect)) | |
6728 | sec_index = SHN_UNDEF; | |
6729 | else | |
6730 | sec_index = SHN_BAD; | |
6731 | ||
6732 | bed = get_elf_backend_data (abfd); | |
6733 | if (bed->elf_backend_section_from_bfd_section) | |
6734 | { | |
6735 | int retval = sec_index; | |
6736 | ||
6737 | if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval)) | |
6738 | return retval; | |
6739 | } | |
6740 | ||
6741 | if (sec_index == SHN_BAD) | |
6742 | bfd_set_error (bfd_error_nonrepresentable_section); | |
6743 | ||
6744 | return sec_index; | |
6745 | } | |
6746 | ||
6747 | /* Given a BFD symbol, return the index in the ELF symbol table, or -1 | |
6748 | on error. */ | |
6749 | ||
6750 | int | |
6751 | _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr) | |
6752 | { | |
6753 | asymbol *asym_ptr = *asym_ptr_ptr; | |
6754 | int idx; | |
6755 | flagword flags = asym_ptr->flags; | |
6756 | ||
6757 | /* When gas creates relocations against local labels, it creates its | |
6758 | own symbol for the section, but does put the symbol into the | |
6759 | symbol chain, so udata is 0. When the linker is generating | |
6760 | relocatable output, this section symbol may be for one of the | |
6761 | input sections rather than the output section. */ | |
6762 | if (asym_ptr->udata.i == 0 | |
6763 | && (flags & BSF_SECTION_SYM) | |
6764 | && asym_ptr->section) | |
6765 | { | |
6766 | asection *sec; | |
6767 | ||
6768 | sec = asym_ptr->section; | |
6769 | if (sec->owner != abfd && sec->output_section != NULL) | |
6770 | sec = sec->output_section; | |
6771 | if (sec->owner == abfd | |
6772 | && sec->index < elf_num_section_syms (abfd) | |
6773 | && elf_section_syms (abfd)[sec->index] != NULL) | |
6774 | asym_ptr->udata.i = elf_section_syms (abfd)[sec->index]->udata.i; | |
6775 | } | |
6776 | ||
6777 | idx = asym_ptr->udata.i; | |
6778 | ||
6779 | if (idx == 0) | |
6780 | { | |
6781 | /* This case can occur when using --strip-symbol on a symbol | |
6782 | which is used in a relocation entry. */ | |
6783 | _bfd_error_handler | |
6784 | /* xgettext:c-format */ | |
6785 | (_("%pB: symbol `%s' required but not present"), | |
6786 | abfd, bfd_asymbol_name (asym_ptr)); | |
6787 | bfd_set_error (bfd_error_no_symbols); | |
6788 | return -1; | |
6789 | } | |
6790 | ||
6791 | #if DEBUG & 4 | |
6792 | { | |
6793 | fprintf (stderr, | |
6794 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8x\n", | |
6795 | (long) asym_ptr, asym_ptr->name, idx, flags); | |
6796 | fflush (stderr); | |
6797 | } | |
6798 | #endif | |
6799 | ||
6800 | return idx; | |
6801 | } | |
6802 | ||
6803 | /* Rewrite program header information. */ | |
6804 | ||
6805 | static bool | |
6806 | rewrite_elf_program_header (bfd *ibfd, bfd *obfd, bfd_vma maxpagesize) | |
6807 | { | |
6808 | Elf_Internal_Ehdr *iehdr; | |
6809 | struct elf_segment_map *map; | |
6810 | struct elf_segment_map *map_first; | |
6811 | struct elf_segment_map **pointer_to_map; | |
6812 | Elf_Internal_Phdr *segment; | |
6813 | asection *section; | |
6814 | unsigned int i; | |
6815 | unsigned int num_segments; | |
6816 | bool phdr_included = false; | |
6817 | bool p_paddr_valid; | |
6818 | struct elf_segment_map *phdr_adjust_seg = NULL; | |
6819 | unsigned int phdr_adjust_num = 0; | |
6820 | const struct elf_backend_data *bed; | |
6821 | unsigned int opb = bfd_octets_per_byte (ibfd, NULL); | |
6822 | ||
6823 | bed = get_elf_backend_data (ibfd); | |
6824 | iehdr = elf_elfheader (ibfd); | |
6825 | ||
6826 | map_first = NULL; | |
6827 | pointer_to_map = &map_first; | |
6828 | ||
6829 | num_segments = elf_elfheader (ibfd)->e_phnum; | |
6830 | ||
6831 | /* Returns the end address of the segment + 1. */ | |
6832 | #define SEGMENT_END(segment, start) \ | |
6833 | (start + (segment->p_memsz > segment->p_filesz \ | |
6834 | ? segment->p_memsz : segment->p_filesz)) | |
6835 | ||
6836 | #define SECTION_SIZE(section, segment) \ | |
6837 | (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \ | |
6838 | != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \ | |
6839 | ? section->size : 0) | |
6840 | ||
6841 | /* Returns TRUE if the given section is contained within | |
6842 | the given segment. VMA addresses are compared. */ | |
6843 | #define IS_CONTAINED_BY_VMA(section, segment, opb) \ | |
6844 | (section->vma * (opb) >= segment->p_vaddr \ | |
6845 | && (section->vma * (opb) + SECTION_SIZE (section, segment) \ | |
6846 | <= (SEGMENT_END (segment, segment->p_vaddr)))) | |
6847 | ||
6848 | /* Returns TRUE if the given section is contained within | |
6849 | the given segment. LMA addresses are compared. */ | |
6850 | #define IS_CONTAINED_BY_LMA(section, segment, base, opb) \ | |
6851 | (section->lma * (opb) >= base \ | |
6852 | && (section->lma + SECTION_SIZE (section, segment) / (opb) >= section->lma) \ | |
6853 | && (section->lma * (opb) + SECTION_SIZE (section, segment) \ | |
6854 | <= SEGMENT_END (segment, base))) | |
6855 | ||
6856 | /* Handle PT_NOTE segment. */ | |
6857 | #define IS_NOTE(p, s) \ | |
6858 | (p->p_type == PT_NOTE \ | |
6859 | && elf_section_type (s) == SHT_NOTE \ | |
6860 | && (bfd_vma) s->filepos >= p->p_offset \ | |
6861 | && ((bfd_vma) s->filepos + s->size \ | |
6862 | <= p->p_offset + p->p_filesz)) | |
6863 | ||
6864 | /* Special case: corefile "NOTE" section containing regs, prpsinfo | |
6865 | etc. */ | |
6866 | #define IS_COREFILE_NOTE(p, s) \ | |
6867 | (IS_NOTE (p, s) \ | |
6868 | && bfd_get_format (ibfd) == bfd_core \ | |
6869 | && s->vma == 0 \ | |
6870 | && s->lma == 0) | |
6871 | ||
6872 | /* The complicated case when p_vaddr is 0 is to handle the Solaris | |
6873 | linker, which generates a PT_INTERP section with p_vaddr and | |
6874 | p_memsz set to 0. */ | |
6875 | #define IS_SOLARIS_PT_INTERP(p, s) \ | |
6876 | (p->p_vaddr == 0 \ | |
6877 | && p->p_paddr == 0 \ | |
6878 | && p->p_memsz == 0 \ | |
6879 | && p->p_filesz > 0 \ | |
6880 | && (s->flags & SEC_HAS_CONTENTS) != 0 \ | |
6881 | && s->size > 0 \ | |
6882 | && (bfd_vma) s->filepos >= p->p_offset \ | |
6883 | && ((bfd_vma) s->filepos + s->size \ | |
6884 | <= p->p_offset + p->p_filesz)) | |
6885 | ||
6886 | /* Decide if the given section should be included in the given segment. | |
6887 | A section will be included if: | |
6888 | 1. It is within the address space of the segment -- we use the LMA | |
6889 | if that is set for the segment and the VMA otherwise, | |
6890 | 2. It is an allocated section or a NOTE section in a PT_NOTE | |
6891 | segment. | |
6892 | 3. There is an output section associated with it, | |
6893 | 4. The section has not already been allocated to a previous segment. | |
6894 | 5. PT_GNU_STACK segments do not include any sections. | |
6895 | 6. PT_TLS segment includes only SHF_TLS sections. | |
6896 | 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. | |
6897 | 8. PT_DYNAMIC should not contain empty sections at the beginning | |
6898 | (with the possible exception of .dynamic). */ | |
6899 | #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed, opb) \ | |
6900 | ((((segment->p_paddr \ | |
6901 | ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr, opb) \ | |
6902 | : IS_CONTAINED_BY_VMA (section, segment, opb)) \ | |
6903 | && (section->flags & SEC_ALLOC) != 0) \ | |
6904 | || IS_NOTE (segment, section)) \ | |
6905 | && segment->p_type != PT_GNU_STACK \ | |
6906 | && (segment->p_type != PT_TLS \ | |
6907 | || (section->flags & SEC_THREAD_LOCAL)) \ | |
6908 | && (segment->p_type == PT_LOAD \ | |
6909 | || segment->p_type == PT_TLS \ | |
6910 | || (section->flags & SEC_THREAD_LOCAL) == 0) \ | |
6911 | && (segment->p_type != PT_DYNAMIC \ | |
6912 | || SECTION_SIZE (section, segment) > 0 \ | |
6913 | || (segment->p_paddr \ | |
6914 | ? segment->p_paddr != section->lma * (opb) \ | |
6915 | : segment->p_vaddr != section->vma * (opb)) \ | |
6916 | || (strcmp (bfd_section_name (section), ".dynamic") == 0)) \ | |
6917 | && (segment->p_type != PT_LOAD || !section->segment_mark)) | |
6918 | ||
6919 | /* If the output section of a section in the input segment is NULL, | |
6920 | it is removed from the corresponding output segment. */ | |
6921 | #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed, opb) \ | |
6922 | (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed, opb) \ | |
6923 | && section->output_section != NULL) | |
6924 | ||
6925 | /* Returns TRUE iff seg1 starts after the end of seg2. */ | |
6926 | #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \ | |
6927 | (seg1->field >= SEGMENT_END (seg2, seg2->field)) | |
6928 | ||
6929 | /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both | |
6930 | their VMA address ranges and their LMA address ranges overlap. | |
6931 | It is possible to have overlapping VMA ranges without overlapping LMA | |
6932 | ranges. RedBoot images for example can have both .data and .bss mapped | |
6933 | to the same VMA range, but with the .data section mapped to a different | |
6934 | LMA. */ | |
6935 | #define SEGMENT_OVERLAPS(seg1, seg2) \ | |
6936 | ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \ | |
6937 | || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \ | |
6938 | && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \ | |
6939 | || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr))) | |
6940 | ||
6941 | /* Initialise the segment mark field, and discard stupid alignment. */ | |
6942 | for (section = ibfd->sections; section != NULL; section = section->next) | |
6943 | { | |
6944 | asection *o = section->output_section; | |
6945 | if (o != NULL && o->alignment_power >= (sizeof (bfd_vma) * 8) - 1) | |
6946 | o->alignment_power = 0; | |
6947 | section->segment_mark = false; | |
6948 | } | |
6949 | ||
6950 | /* The Solaris linker creates program headers in which all the | |
6951 | p_paddr fields are zero. When we try to objcopy or strip such a | |
6952 | file, we get confused. Check for this case, and if we find it | |
6953 | don't set the p_paddr_valid fields. */ | |
6954 | p_paddr_valid = false; | |
6955 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
6956 | i < num_segments; | |
6957 | i++, segment++) | |
6958 | if (segment->p_paddr != 0) | |
6959 | { | |
6960 | p_paddr_valid = true; | |
6961 | break; | |
6962 | } | |
6963 | ||
6964 | /* Scan through the segments specified in the program header | |
6965 | of the input BFD. For this first scan we look for overlaps | |
6966 | in the loadable segments. These can be created by weird | |
6967 | parameters to objcopy. Also, fix some solaris weirdness. */ | |
6968 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
6969 | i < num_segments; | |
6970 | i++, segment++) | |
6971 | { | |
6972 | unsigned int j; | |
6973 | Elf_Internal_Phdr *segment2; | |
6974 | ||
6975 | if (segment->p_type == PT_INTERP) | |
6976 | for (section = ibfd->sections; section; section = section->next) | |
6977 | if (IS_SOLARIS_PT_INTERP (segment, section)) | |
6978 | { | |
6979 | /* Mininal change so that the normal section to segment | |
6980 | assignment code will work. */ | |
6981 | segment->p_vaddr = section->vma * opb; | |
6982 | break; | |
6983 | } | |
6984 | ||
6985 | if (segment->p_type != PT_LOAD) | |
6986 | { | |
6987 | /* Remove PT_GNU_RELRO segment. */ | |
6988 | if (segment->p_type == PT_GNU_RELRO) | |
6989 | segment->p_type = PT_NULL; | |
6990 | continue; | |
6991 | } | |
6992 | ||
6993 | /* Determine if this segment overlaps any previous segments. */ | |
6994 | for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++) | |
6995 | { | |
6996 | bfd_signed_vma extra_length; | |
6997 | ||
6998 | if (segment2->p_type != PT_LOAD | |
6999 | || !SEGMENT_OVERLAPS (segment, segment2)) | |
7000 | continue; | |
7001 | ||
7002 | /* Merge the two segments together. */ | |
7003 | if (segment2->p_vaddr < segment->p_vaddr) | |
7004 | { | |
7005 | /* Extend SEGMENT2 to include SEGMENT and then delete | |
7006 | SEGMENT. */ | |
7007 | extra_length = (SEGMENT_END (segment, segment->p_vaddr) | |
7008 | - SEGMENT_END (segment2, segment2->p_vaddr)); | |
7009 | ||
7010 | if (extra_length > 0) | |
7011 | { | |
7012 | segment2->p_memsz += extra_length; | |
7013 | segment2->p_filesz += extra_length; | |
7014 | } | |
7015 | ||
7016 | segment->p_type = PT_NULL; | |
7017 | ||
7018 | /* Since we have deleted P we must restart the outer loop. */ | |
7019 | i = 0; | |
7020 | segment = elf_tdata (ibfd)->phdr; | |
7021 | break; | |
7022 | } | |
7023 | else | |
7024 | { | |
7025 | /* Extend SEGMENT to include SEGMENT2 and then delete | |
7026 | SEGMENT2. */ | |
7027 | extra_length = (SEGMENT_END (segment2, segment2->p_vaddr) | |
7028 | - SEGMENT_END (segment, segment->p_vaddr)); | |
7029 | ||
7030 | if (extra_length > 0) | |
7031 | { | |
7032 | segment->p_memsz += extra_length; | |
7033 | segment->p_filesz += extra_length; | |
7034 | } | |
7035 | ||
7036 | segment2->p_type = PT_NULL; | |
7037 | } | |
7038 | } | |
7039 | } | |
7040 | ||
7041 | /* The second scan attempts to assign sections to segments. */ | |
7042 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
7043 | i < num_segments; | |
7044 | i++, segment++) | |
7045 | { | |
7046 | unsigned int section_count; | |
7047 | asection **sections; | |
7048 | asection *output_section; | |
7049 | unsigned int isec; | |
7050 | asection *matching_lma; | |
7051 | asection *suggested_lma; | |
7052 | unsigned int j; | |
7053 | size_t amt; | |
7054 | asection *first_section; | |
7055 | ||
7056 | if (segment->p_type == PT_NULL) | |
7057 | continue; | |
7058 | ||
7059 | first_section = NULL; | |
7060 | /* Compute how many sections might be placed into this segment. */ | |
7061 | for (section = ibfd->sections, section_count = 0; | |
7062 | section != NULL; | |
7063 | section = section->next) | |
7064 | { | |
7065 | /* Find the first section in the input segment, which may be | |
7066 | removed from the corresponding output segment. */ | |
7067 | if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed, opb)) | |
7068 | { | |
7069 | if (first_section == NULL) | |
7070 | first_section = section; | |
7071 | if (section->output_section != NULL) | |
7072 | ++section_count; | |
7073 | } | |
7074 | } | |
7075 | ||
7076 | /* Allocate a segment map big enough to contain | |
7077 | all of the sections we have selected. */ | |
7078 | amt = sizeof (struct elf_segment_map) - sizeof (asection *); | |
7079 | amt += section_count * sizeof (asection *); | |
7080 | map = (struct elf_segment_map *) bfd_zalloc (obfd, amt); | |
7081 | if (map == NULL) | |
7082 | return false; | |
7083 | ||
7084 | /* Initialise the fields of the segment map. Default to | |
7085 | using the physical address of the segment in the input BFD. */ | |
7086 | map->next = NULL; | |
7087 | map->p_type = segment->p_type; | |
7088 | map->p_flags = segment->p_flags; | |
7089 | map->p_flags_valid = 1; | |
7090 | ||
7091 | if (map->p_type == PT_LOAD | |
7092 | && (ibfd->flags & D_PAGED) != 0 | |
7093 | && maxpagesize > 1 | |
7094 | && segment->p_align > 1) | |
7095 | { | |
7096 | map->p_align = segment->p_align; | |
7097 | if (segment->p_align > maxpagesize) | |
7098 | map->p_align = maxpagesize; | |
7099 | map->p_align_valid = 1; | |
7100 | } | |
7101 | ||
7102 | /* If the first section in the input segment is removed, there is | |
7103 | no need to preserve segment physical address in the corresponding | |
7104 | output segment. */ | |
7105 | if (!first_section || first_section->output_section != NULL) | |
7106 | { | |
7107 | map->p_paddr = segment->p_paddr; | |
7108 | map->p_paddr_valid = p_paddr_valid; | |
7109 | } | |
7110 | ||
7111 | /* Determine if this segment contains the ELF file header | |
7112 | and if it contains the program headers themselves. */ | |
7113 | map->includes_filehdr = (segment->p_offset == 0 | |
7114 | && segment->p_filesz >= iehdr->e_ehsize); | |
7115 | map->includes_phdrs = 0; | |
7116 | ||
7117 | if (!phdr_included || segment->p_type != PT_LOAD) | |
7118 | { | |
7119 | map->includes_phdrs = | |
7120 | (segment->p_offset <= (bfd_vma) iehdr->e_phoff | |
7121 | && (segment->p_offset + segment->p_filesz | |
7122 | >= ((bfd_vma) iehdr->e_phoff | |
7123 | + iehdr->e_phnum * iehdr->e_phentsize))); | |
7124 | ||
7125 | if (segment->p_type == PT_LOAD && map->includes_phdrs) | |
7126 | phdr_included = true; | |
7127 | } | |
7128 | ||
7129 | if (section_count == 0) | |
7130 | { | |
7131 | /* Special segments, such as the PT_PHDR segment, may contain | |
7132 | no sections, but ordinary, loadable segments should contain | |
7133 | something. They are allowed by the ELF spec however, so only | |
7134 | a warning is produced. | |
7135 | There is however the valid use case of embedded systems which | |
7136 | have segments with p_filesz of 0 and a p_memsz > 0 to initialize | |
7137 | flash memory with zeros. No warning is shown for that case. */ | |
7138 | if (segment->p_type == PT_LOAD | |
7139 | && (segment->p_filesz > 0 || segment->p_memsz == 0)) | |
7140 | /* xgettext:c-format */ | |
7141 | _bfd_error_handler | |
7142 | (_("%pB: warning: empty loadable segment detected" | |
7143 | " at vaddr=%#" PRIx64 ", is this intentional?"), | |
7144 | ibfd, (uint64_t) segment->p_vaddr); | |
7145 | ||
7146 | map->p_vaddr_offset = segment->p_vaddr / opb; | |
7147 | map->count = 0; | |
7148 | *pointer_to_map = map; | |
7149 | pointer_to_map = &map->next; | |
7150 | ||
7151 | continue; | |
7152 | } | |
7153 | ||
7154 | /* Now scan the sections in the input BFD again and attempt | |
7155 | to add their corresponding output sections to the segment map. | |
7156 | The problem here is how to handle an output section which has | |
7157 | been moved (ie had its LMA changed). There are four possibilities: | |
7158 | ||
7159 | 1. None of the sections have been moved. | |
7160 | In this case we can continue to use the segment LMA from the | |
7161 | input BFD. | |
7162 | ||
7163 | 2. All of the sections have been moved by the same amount. | |
7164 | In this case we can change the segment's LMA to match the LMA | |
7165 | of the first section. | |
7166 | ||
7167 | 3. Some of the sections have been moved, others have not. | |
7168 | In this case those sections which have not been moved can be | |
7169 | placed in the current segment which will have to have its size, | |
7170 | and possibly its LMA changed, and a new segment or segments will | |
7171 | have to be created to contain the other sections. | |
7172 | ||
7173 | 4. The sections have been moved, but not by the same amount. | |
7174 | In this case we can change the segment's LMA to match the LMA | |
7175 | of the first section and we will have to create a new segment | |
7176 | or segments to contain the other sections. | |
7177 | ||
7178 | In order to save time, we allocate an array to hold the section | |
7179 | pointers that we are interested in. As these sections get assigned | |
7180 | to a segment, they are removed from this array. */ | |
7181 | ||
7182 | amt = section_count * sizeof (asection *); | |
7183 | sections = (asection **) bfd_malloc (amt); | |
7184 | if (sections == NULL) | |
7185 | return false; | |
7186 | ||
7187 | /* Step One: Scan for segment vs section LMA conflicts. | |
7188 | Also add the sections to the section array allocated above. | |
7189 | Also add the sections to the current segment. In the common | |
7190 | case, where the sections have not been moved, this means that | |
7191 | we have completely filled the segment, and there is nothing | |
7192 | more to do. */ | |
7193 | isec = 0; | |
7194 | matching_lma = NULL; | |
7195 | suggested_lma = NULL; | |
7196 | ||
7197 | for (section = first_section, j = 0; | |
7198 | section != NULL; | |
7199 | section = section->next) | |
7200 | { | |
7201 | if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed, opb)) | |
7202 | { | |
7203 | output_section = section->output_section; | |
7204 | ||
7205 | sections[j++] = section; | |
7206 | ||
7207 | /* The Solaris native linker always sets p_paddr to 0. | |
7208 | We try to catch that case here, and set it to the | |
7209 | correct value. Note - some backends require that | |
7210 | p_paddr be left as zero. */ | |
7211 | if (!p_paddr_valid | |
7212 | && segment->p_vaddr != 0 | |
7213 | && !bed->want_p_paddr_set_to_zero | |
7214 | && isec == 0 | |
7215 | && output_section->lma != 0 | |
7216 | && (align_power (segment->p_vaddr | |
7217 | + (map->includes_filehdr | |
7218 | ? iehdr->e_ehsize : 0) | |
7219 | + (map->includes_phdrs | |
7220 | ? iehdr->e_phnum * iehdr->e_phentsize | |
7221 | : 0), | |
7222 | output_section->alignment_power * opb) | |
7223 | == (output_section->vma * opb))) | |
7224 | map->p_paddr = segment->p_vaddr; | |
7225 | ||
7226 | /* Match up the physical address of the segment with the | |
7227 | LMA address of the output section. */ | |
7228 | if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr, | |
7229 | opb) | |
7230 | || IS_COREFILE_NOTE (segment, section) | |
7231 | || (bed->want_p_paddr_set_to_zero | |
7232 | && IS_CONTAINED_BY_VMA (output_section, segment, opb))) | |
7233 | { | |
7234 | if (matching_lma == NULL | |
7235 | || output_section->lma < matching_lma->lma) | |
7236 | matching_lma = output_section; | |
7237 | ||
7238 | /* We assume that if the section fits within the segment | |
7239 | then it does not overlap any other section within that | |
7240 | segment. */ | |
7241 | map->sections[isec++] = output_section; | |
7242 | } | |
7243 | else if (suggested_lma == NULL) | |
7244 | suggested_lma = output_section; | |
7245 | ||
7246 | if (j == section_count) | |
7247 | break; | |
7248 | } | |
7249 | } | |
7250 | ||
7251 | BFD_ASSERT (j == section_count); | |
7252 | ||
7253 | /* Step Two: Adjust the physical address of the current segment, | |
7254 | if necessary. */ | |
7255 | if (isec == section_count) | |
7256 | { | |
7257 | /* All of the sections fitted within the segment as currently | |
7258 | specified. This is the default case. Add the segment to | |
7259 | the list of built segments and carry on to process the next | |
7260 | program header in the input BFD. */ | |
7261 | map->count = section_count; | |
7262 | *pointer_to_map = map; | |
7263 | pointer_to_map = &map->next; | |
7264 | ||
7265 | if (p_paddr_valid | |
7266 | && !bed->want_p_paddr_set_to_zero) | |
7267 | { | |
7268 | bfd_vma hdr_size = 0; | |
7269 | if (map->includes_filehdr) | |
7270 | hdr_size = iehdr->e_ehsize; | |
7271 | if (map->includes_phdrs) | |
7272 | hdr_size += iehdr->e_phnum * iehdr->e_phentsize; | |
7273 | ||
7274 | /* Account for padding before the first section in the | |
7275 | segment. */ | |
7276 | map->p_vaddr_offset = ((map->p_paddr + hdr_size) / opb | |
7277 | - matching_lma->lma); | |
7278 | } | |
7279 | ||
7280 | free (sections); | |
7281 | continue; | |
7282 | } | |
7283 | else | |
7284 | { | |
7285 | /* Change the current segment's physical address to match | |
7286 | the LMA of the first section that fitted, or if no | |
7287 | section fitted, the first section. */ | |
7288 | if (matching_lma == NULL) | |
7289 | matching_lma = suggested_lma; | |
7290 | ||
7291 | map->p_paddr = matching_lma->lma * opb; | |
7292 | ||
7293 | /* Offset the segment physical address from the lma | |
7294 | to allow for space taken up by elf headers. */ | |
7295 | if (map->includes_phdrs) | |
7296 | { | |
7297 | map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize; | |
7298 | ||
7299 | /* iehdr->e_phnum is just an estimate of the number | |
7300 | of program headers that we will need. Make a note | |
7301 | here of the number we used and the segment we chose | |
7302 | to hold these headers, so that we can adjust the | |
7303 | offset when we know the correct value. */ | |
7304 | phdr_adjust_num = iehdr->e_phnum; | |
7305 | phdr_adjust_seg = map; | |
7306 | } | |
7307 | ||
7308 | if (map->includes_filehdr) | |
7309 | { | |
7310 | bfd_vma align = (bfd_vma) 1 << matching_lma->alignment_power; | |
7311 | map->p_paddr -= iehdr->e_ehsize; | |
7312 | /* We've subtracted off the size of headers from the | |
7313 | first section lma, but there may have been some | |
7314 | alignment padding before that section too. Try to | |
7315 | account for that by adjusting the segment lma down to | |
7316 | the same alignment. */ | |
7317 | if (segment->p_align != 0 && segment->p_align < align) | |
7318 | align = segment->p_align; | |
7319 | map->p_paddr &= -(align * opb); | |
7320 | } | |
7321 | } | |
7322 | ||
7323 | /* Step Three: Loop over the sections again, this time assigning | |
7324 | those that fit to the current segment and removing them from the | |
7325 | sections array; but making sure not to leave large gaps. Once all | |
7326 | possible sections have been assigned to the current segment it is | |
7327 | added to the list of built segments and if sections still remain | |
7328 | to be assigned, a new segment is constructed before repeating | |
7329 | the loop. */ | |
7330 | isec = 0; | |
7331 | do | |
7332 | { | |
7333 | map->count = 0; | |
7334 | suggested_lma = NULL; | |
7335 | ||
7336 | /* Fill the current segment with sections that fit. */ | |
7337 | for (j = 0; j < section_count; j++) | |
7338 | { | |
7339 | section = sections[j]; | |
7340 | ||
7341 | if (section == NULL) | |
7342 | continue; | |
7343 | ||
7344 | output_section = section->output_section; | |
7345 | ||
7346 | BFD_ASSERT (output_section != NULL); | |
7347 | ||
7348 | if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr, | |
7349 | opb) | |
7350 | || IS_COREFILE_NOTE (segment, section)) | |
7351 | { | |
7352 | if (map->count == 0) | |
7353 | { | |
7354 | /* If the first section in a segment does not start at | |
7355 | the beginning of the segment, then something is | |
7356 | wrong. */ | |
7357 | if (align_power (map->p_paddr | |
7358 | + (map->includes_filehdr | |
7359 | ? iehdr->e_ehsize : 0) | |
7360 | + (map->includes_phdrs | |
7361 | ? iehdr->e_phnum * iehdr->e_phentsize | |
7362 | : 0), | |
7363 | output_section->alignment_power * opb) | |
7364 | != output_section->lma * opb) | |
7365 | goto sorry; | |
7366 | } | |
7367 | else | |
7368 | { | |
7369 | asection *prev_sec; | |
7370 | ||
7371 | prev_sec = map->sections[map->count - 1]; | |
7372 | ||
7373 | /* If the gap between the end of the previous section | |
7374 | and the start of this section is more than | |
7375 | maxpagesize then we need to start a new segment. */ | |
7376 | if ((BFD_ALIGN (prev_sec->lma + prev_sec->size, | |
7377 | maxpagesize) | |
7378 | < BFD_ALIGN (output_section->lma, maxpagesize)) | |
7379 | || (prev_sec->lma + prev_sec->size | |
7380 | > output_section->lma)) | |
7381 | { | |
7382 | if (suggested_lma == NULL) | |
7383 | suggested_lma = output_section; | |
7384 | ||
7385 | continue; | |
7386 | } | |
7387 | } | |
7388 | ||
7389 | map->sections[map->count++] = output_section; | |
7390 | ++isec; | |
7391 | sections[j] = NULL; | |
7392 | if (segment->p_type == PT_LOAD) | |
7393 | section->segment_mark = true; | |
7394 | } | |
7395 | else if (suggested_lma == NULL) | |
7396 | suggested_lma = output_section; | |
7397 | } | |
7398 | ||
7399 | /* PR 23932. A corrupt input file may contain sections that cannot | |
7400 | be assigned to any segment - because for example they have a | |
7401 | negative size - or segments that do not contain any sections. | |
7402 | But there are also valid reasons why a segment can be empty. | |
7403 | So allow a count of zero. */ | |
7404 | ||
7405 | /* Add the current segment to the list of built segments. */ | |
7406 | *pointer_to_map = map; | |
7407 | pointer_to_map = &map->next; | |
7408 | ||
7409 | if (isec < section_count) | |
7410 | { | |
7411 | /* We still have not allocated all of the sections to | |
7412 | segments. Create a new segment here, initialise it | |
7413 | and carry on looping. */ | |
7414 | amt = sizeof (struct elf_segment_map) - sizeof (asection *); | |
7415 | amt += section_count * sizeof (asection *); | |
7416 | map = (struct elf_segment_map *) bfd_zalloc (obfd, amt); | |
7417 | if (map == NULL) | |
7418 | { | |
7419 | free (sections); | |
7420 | return false; | |
7421 | } | |
7422 | ||
7423 | /* Initialise the fields of the segment map. Set the physical | |
7424 | physical address to the LMA of the first section that has | |
7425 | not yet been assigned. */ | |
7426 | map->next = NULL; | |
7427 | map->p_type = segment->p_type; | |
7428 | map->p_flags = segment->p_flags; | |
7429 | map->p_flags_valid = 1; | |
7430 | map->p_paddr = suggested_lma->lma * opb; | |
7431 | map->p_paddr_valid = p_paddr_valid; | |
7432 | map->includes_filehdr = 0; | |
7433 | map->includes_phdrs = 0; | |
7434 | } | |
7435 | ||
7436 | continue; | |
7437 | sorry: | |
7438 | bfd_set_error (bfd_error_sorry); | |
7439 | free (sections); | |
7440 | return false; | |
7441 | } | |
7442 | while (isec < section_count); | |
7443 | ||
7444 | free (sections); | |
7445 | } | |
7446 | ||
7447 | elf_seg_map (obfd) = map_first; | |
7448 | ||
7449 | /* If we had to estimate the number of program headers that were | |
7450 | going to be needed, then check our estimate now and adjust | |
7451 | the offset if necessary. */ | |
7452 | if (phdr_adjust_seg != NULL) | |
7453 | { | |
7454 | unsigned int count; | |
7455 | ||
7456 | for (count = 0, map = map_first; map != NULL; map = map->next) | |
7457 | count++; | |
7458 | ||
7459 | if (count > phdr_adjust_num) | |
7460 | phdr_adjust_seg->p_paddr | |
7461 | -= (count - phdr_adjust_num) * iehdr->e_phentsize; | |
7462 | ||
7463 | for (map = map_first; map != NULL; map = map->next) | |
7464 | if (map->p_type == PT_PHDR) | |
7465 | { | |
7466 | bfd_vma adjust | |
7467 | = phdr_adjust_seg->includes_filehdr ? iehdr->e_ehsize : 0; | |
7468 | map->p_paddr = phdr_adjust_seg->p_paddr + adjust; | |
7469 | break; | |
7470 | } | |
7471 | } | |
7472 | ||
7473 | #undef SEGMENT_END | |
7474 | #undef SECTION_SIZE | |
7475 | #undef IS_CONTAINED_BY_VMA | |
7476 | #undef IS_CONTAINED_BY_LMA | |
7477 | #undef IS_NOTE | |
7478 | #undef IS_COREFILE_NOTE | |
7479 | #undef IS_SOLARIS_PT_INTERP | |
7480 | #undef IS_SECTION_IN_INPUT_SEGMENT | |
7481 | #undef INCLUDE_SECTION_IN_SEGMENT | |
7482 | #undef SEGMENT_AFTER_SEGMENT | |
7483 | #undef SEGMENT_OVERLAPS | |
7484 | return true; | |
7485 | } | |
7486 | ||
7487 | /* Copy ELF program header information. */ | |
7488 | ||
7489 | static bool | |
7490 | copy_elf_program_header (bfd *ibfd, bfd *obfd) | |
7491 | { | |
7492 | Elf_Internal_Ehdr *iehdr; | |
7493 | struct elf_segment_map *map; | |
7494 | struct elf_segment_map *map_first; | |
7495 | struct elf_segment_map **pointer_to_map; | |
7496 | Elf_Internal_Phdr *segment; | |
7497 | unsigned int i; | |
7498 | unsigned int num_segments; | |
7499 | bool phdr_included = false; | |
7500 | bool p_paddr_valid; | |
7501 | unsigned int opb = bfd_octets_per_byte (ibfd, NULL); | |
7502 | ||
7503 | iehdr = elf_elfheader (ibfd); | |
7504 | ||
7505 | map_first = NULL; | |
7506 | pointer_to_map = &map_first; | |
7507 | ||
7508 | /* If all the segment p_paddr fields are zero, don't set | |
7509 | map->p_paddr_valid. */ | |
7510 | p_paddr_valid = false; | |
7511 | num_segments = elf_elfheader (ibfd)->e_phnum; | |
7512 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
7513 | i < num_segments; | |
7514 | i++, segment++) | |
7515 | if (segment->p_paddr != 0) | |
7516 | { | |
7517 | p_paddr_valid = true; | |
7518 | break; | |
7519 | } | |
7520 | ||
7521 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
7522 | i < num_segments; | |
7523 | i++, segment++) | |
7524 | { | |
7525 | asection *section; | |
7526 | unsigned int section_count; | |
7527 | size_t amt; | |
7528 | Elf_Internal_Shdr *this_hdr; | |
7529 | asection *first_section = NULL; | |
7530 | asection *lowest_section; | |
7531 | ||
7532 | /* Compute how many sections are in this segment. */ | |
7533 | for (section = ibfd->sections, section_count = 0; | |
7534 | section != NULL; | |
7535 | section = section->next) | |
7536 | { | |
7537 | this_hdr = &(elf_section_data(section)->this_hdr); | |
7538 | if (ELF_SECTION_IN_SEGMENT (this_hdr, segment)) | |
7539 | { | |
7540 | if (first_section == NULL) | |
7541 | first_section = section; | |
7542 | section_count++; | |
7543 | } | |
7544 | } | |
7545 | ||
7546 | /* Allocate a segment map big enough to contain | |
7547 | all of the sections we have selected. */ | |
7548 | amt = sizeof (struct elf_segment_map) - sizeof (asection *); | |
7549 | amt += section_count * sizeof (asection *); | |
7550 | map = (struct elf_segment_map *) bfd_zalloc (obfd, amt); | |
7551 | if (map == NULL) | |
7552 | return false; | |
7553 | ||
7554 | /* Initialize the fields of the output segment map with the | |
7555 | input segment. */ | |
7556 | map->next = NULL; | |
7557 | map->p_type = segment->p_type; | |
7558 | map->p_flags = segment->p_flags; | |
7559 | map->p_flags_valid = 1; | |
7560 | map->p_paddr = segment->p_paddr; | |
7561 | map->p_paddr_valid = p_paddr_valid; | |
7562 | map->p_align = segment->p_align; | |
7563 | map->p_align_valid = 1; | |
7564 | map->p_vaddr_offset = 0; | |
7565 | ||
7566 | if (map->p_type == PT_GNU_RELRO | |
7567 | || map->p_type == PT_GNU_STACK) | |
7568 | { | |
7569 | /* The PT_GNU_RELRO segment may contain the first a few | |
7570 | bytes in the .got.plt section even if the whole .got.plt | |
7571 | section isn't in the PT_GNU_RELRO segment. We won't | |
7572 | change the size of the PT_GNU_RELRO segment. | |
7573 | Similarly, PT_GNU_STACK size is significant on uclinux | |
7574 | systems. */ | |
7575 | map->p_size = segment->p_memsz; | |
7576 | map->p_size_valid = 1; | |
7577 | } | |
7578 | ||
7579 | /* Determine if this segment contains the ELF file header | |
7580 | and if it contains the program headers themselves. */ | |
7581 | map->includes_filehdr = (segment->p_offset == 0 | |
7582 | && segment->p_filesz >= iehdr->e_ehsize); | |
7583 | ||
7584 | map->includes_phdrs = 0; | |
7585 | if (! phdr_included || segment->p_type != PT_LOAD) | |
7586 | { | |
7587 | map->includes_phdrs = | |
7588 | (segment->p_offset <= (bfd_vma) iehdr->e_phoff | |
7589 | && (segment->p_offset + segment->p_filesz | |
7590 | >= ((bfd_vma) iehdr->e_phoff | |
7591 | + iehdr->e_phnum * iehdr->e_phentsize))); | |
7592 | ||
7593 | if (segment->p_type == PT_LOAD && map->includes_phdrs) | |
7594 | phdr_included = true; | |
7595 | } | |
7596 | ||
7597 | lowest_section = NULL; | |
7598 | if (section_count != 0) | |
7599 | { | |
7600 | unsigned int isec = 0; | |
7601 | ||
7602 | for (section = first_section; | |
7603 | section != NULL; | |
7604 | section = section->next) | |
7605 | { | |
7606 | this_hdr = &(elf_section_data(section)->this_hdr); | |
7607 | if (ELF_SECTION_IN_SEGMENT (this_hdr, segment)) | |
7608 | { | |
7609 | map->sections[isec++] = section->output_section; | |
7610 | if ((section->flags & SEC_ALLOC) != 0) | |
7611 | { | |
7612 | bfd_vma seg_off; | |
7613 | ||
7614 | if (lowest_section == NULL | |
7615 | || section->lma < lowest_section->lma) | |
7616 | lowest_section = section; | |
7617 | ||
7618 | /* Section lmas are set up from PT_LOAD header | |
7619 | p_paddr in _bfd_elf_make_section_from_shdr. | |
7620 | If this header has a p_paddr that disagrees | |
7621 | with the section lma, flag the p_paddr as | |
7622 | invalid. */ | |
7623 | if ((section->flags & SEC_LOAD) != 0) | |
7624 | seg_off = this_hdr->sh_offset - segment->p_offset; | |
7625 | else | |
7626 | seg_off = this_hdr->sh_addr - segment->p_vaddr; | |
7627 | if (section->lma * opb - segment->p_paddr != seg_off) | |
7628 | map->p_paddr_valid = false; | |
7629 | } | |
7630 | if (isec == section_count) | |
7631 | break; | |
7632 | } | |
7633 | } | |
7634 | } | |
7635 | ||
7636 | if (section_count == 0) | |
7637 | map->p_vaddr_offset = segment->p_vaddr / opb; | |
7638 | else if (map->p_paddr_valid) | |
7639 | { | |
7640 | /* Account for padding before the first section in the segment. */ | |
7641 | bfd_vma hdr_size = 0; | |
7642 | if (map->includes_filehdr) | |
7643 | hdr_size = iehdr->e_ehsize; | |
7644 | if (map->includes_phdrs) | |
7645 | hdr_size += iehdr->e_phnum * iehdr->e_phentsize; | |
7646 | ||
7647 | map->p_vaddr_offset = ((map->p_paddr + hdr_size) / opb | |
7648 | - (lowest_section ? lowest_section->lma : 0)); | |
7649 | } | |
7650 | ||
7651 | map->count = section_count; | |
7652 | *pointer_to_map = map; | |
7653 | pointer_to_map = &map->next; | |
7654 | } | |
7655 | ||
7656 | elf_seg_map (obfd) = map_first; | |
7657 | return true; | |
7658 | } | |
7659 | ||
7660 | /* Copy private BFD data. This copies or rewrites ELF program header | |
7661 | information. */ | |
7662 | ||
7663 | static bool | |
7664 | copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
7665 | { | |
7666 | bfd_vma maxpagesize; | |
7667 | ||
7668 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
7669 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
7670 | return true; | |
7671 | ||
7672 | if (elf_tdata (ibfd)->phdr == NULL) | |
7673 | return true; | |
7674 | ||
7675 | if (ibfd->xvec == obfd->xvec) | |
7676 | { | |
7677 | /* Check to see if any sections in the input BFD | |
7678 | covered by ELF program header have changed. */ | |
7679 | Elf_Internal_Phdr *segment; | |
7680 | asection *section, *osec; | |
7681 | unsigned int i, num_segments; | |
7682 | Elf_Internal_Shdr *this_hdr; | |
7683 | const struct elf_backend_data *bed; | |
7684 | ||
7685 | bed = get_elf_backend_data (ibfd); | |
7686 | ||
7687 | /* Regenerate the segment map if p_paddr is set to 0. */ | |
7688 | if (bed->want_p_paddr_set_to_zero) | |
7689 | goto rewrite; | |
7690 | ||
7691 | /* Initialize the segment mark field. */ | |
7692 | for (section = obfd->sections; section != NULL; | |
7693 | section = section->next) | |
7694 | section->segment_mark = false; | |
7695 | ||
7696 | num_segments = elf_elfheader (ibfd)->e_phnum; | |
7697 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
7698 | i < num_segments; | |
7699 | i++, segment++) | |
7700 | { | |
7701 | /* PR binutils/3535. The Solaris linker always sets the p_paddr | |
7702 | and p_memsz fields of special segments (DYNAMIC, INTERP) to 0 | |
7703 | which severly confuses things, so always regenerate the segment | |
7704 | map in this case. */ | |
7705 | if (segment->p_paddr == 0 | |
7706 | && segment->p_memsz == 0 | |
7707 | && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC)) | |
7708 | goto rewrite; | |
7709 | ||
7710 | for (section = ibfd->sections; | |
7711 | section != NULL; section = section->next) | |
7712 | { | |
7713 | /* We mark the output section so that we know it comes | |
7714 | from the input BFD. */ | |
7715 | osec = section->output_section; | |
7716 | if (osec) | |
7717 | osec->segment_mark = true; | |
7718 | ||
7719 | /* Check if this section is covered by the segment. */ | |
7720 | this_hdr = &(elf_section_data(section)->this_hdr); | |
7721 | if (ELF_SECTION_IN_SEGMENT (this_hdr, segment)) | |
7722 | { | |
7723 | /* FIXME: Check if its output section is changed or | |
7724 | removed. What else do we need to check? */ | |
7725 | if (osec == NULL | |
7726 | || section->flags != osec->flags | |
7727 | || section->lma != osec->lma | |
7728 | || section->vma != osec->vma | |
7729 | || section->size != osec->size | |
7730 | || section->rawsize != osec->rawsize | |
7731 | || section->alignment_power != osec->alignment_power) | |
7732 | goto rewrite; | |
7733 | } | |
7734 | } | |
7735 | } | |
7736 | ||
7737 | /* Check to see if any output section do not come from the | |
7738 | input BFD. */ | |
7739 | for (section = obfd->sections; section != NULL; | |
7740 | section = section->next) | |
7741 | { | |
7742 | if (!section->segment_mark) | |
7743 | goto rewrite; | |
7744 | else | |
7745 | section->segment_mark = false; | |
7746 | } | |
7747 | ||
7748 | return copy_elf_program_header (ibfd, obfd); | |
7749 | } | |
7750 | ||
7751 | rewrite: | |
7752 | maxpagesize = 0; | |
7753 | if (ibfd->xvec == obfd->xvec) | |
7754 | { | |
7755 | /* When rewriting program header, set the output maxpagesize to | |
7756 | the maximum alignment of input PT_LOAD segments. */ | |
7757 | Elf_Internal_Phdr *segment; | |
7758 | unsigned int i; | |
7759 | unsigned int num_segments = elf_elfheader (ibfd)->e_phnum; | |
7760 | ||
7761 | for (i = 0, segment = elf_tdata (ibfd)->phdr; | |
7762 | i < num_segments; | |
7763 | i++, segment++) | |
7764 | if (segment->p_type == PT_LOAD | |
7765 | && maxpagesize < segment->p_align) | |
7766 | { | |
7767 | /* PR 17512: file: f17299af. */ | |
7768 | if (segment->p_align > (bfd_vma) 1 << ((sizeof (bfd_vma) * 8) - 2)) | |
7769 | /* xgettext:c-format */ | |
7770 | _bfd_error_handler (_("%pB: warning: segment alignment of %#" | |
7771 | PRIx64 " is too large"), | |
7772 | ibfd, (uint64_t) segment->p_align); | |
7773 | else | |
7774 | maxpagesize = segment->p_align; | |
7775 | } | |
7776 | } | |
7777 | if (maxpagesize == 0) | |
7778 | maxpagesize = get_elf_backend_data (obfd)->maxpagesize; | |
7779 | ||
7780 | return rewrite_elf_program_header (ibfd, obfd, maxpagesize); | |
7781 | } | |
7782 | ||
7783 | /* Initialize private output section information from input section. */ | |
7784 | ||
7785 | bool | |
7786 | _bfd_elf_init_private_section_data (bfd *ibfd, | |
7787 | asection *isec, | |
7788 | bfd *obfd, | |
7789 | asection *osec, | |
7790 | struct bfd_link_info *link_info) | |
7791 | ||
7792 | { | |
7793 | Elf_Internal_Shdr *ihdr, *ohdr; | |
7794 | bool final_link = (link_info != NULL | |
7795 | && !bfd_link_relocatable (link_info)); | |
7796 | ||
7797 | if (ibfd->xvec->flavour != bfd_target_elf_flavour | |
7798 | || obfd->xvec->flavour != bfd_target_elf_flavour) | |
7799 | return true; | |
7800 | ||
7801 | BFD_ASSERT (elf_section_data (osec) != NULL); | |
7802 | ||
7803 | /* If this is a known ABI section, ELF section type and flags may | |
7804 | have been set up when OSEC was created. For normal sections we | |
7805 | allow the user to override the type and flags other than | |
7806 | SHF_MASKOS and SHF_MASKPROC. */ | |
7807 | if (elf_section_type (osec) == SHT_PROGBITS | |
7808 | || elf_section_type (osec) == SHT_NOTE | |
7809 | || elf_section_type (osec) == SHT_NOBITS) | |
7810 | elf_section_type (osec) = SHT_NULL; | |
7811 | /* For objcopy and relocatable link, copy the ELF section type from | |
7812 | the input file if the BFD section flags are the same. (If they | |
7813 | are different the user may be doing something like | |
7814 | "objcopy --set-section-flags .text=alloc,data".) For a final | |
7815 | link allow some flags that the linker clears to differ. */ | |
7816 | if (elf_section_type (osec) == SHT_NULL | |
7817 | && (osec->flags == isec->flags | |
7818 | || (final_link | |
7819 | && ((osec->flags ^ isec->flags) | |
7820 | & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0))) | |
7821 | elf_section_type (osec) = elf_section_type (isec); | |
7822 | ||
7823 | /* FIXME: Is this correct for all OS/PROC specific flags? */ | |
7824 | elf_section_flags (osec) = (elf_section_flags (isec) | |
7825 | & (SHF_MASKOS | SHF_MASKPROC)); | |
7826 | ||
7827 | /* Copy sh_info from input for mbind section. */ | |
7828 | if ((elf_tdata (ibfd)->has_gnu_osabi & elf_gnu_osabi_mbind) != 0 | |
7829 | && elf_section_flags (isec) & SHF_GNU_MBIND) | |
7830 | elf_section_data (osec)->this_hdr.sh_info | |
7831 | = elf_section_data (isec)->this_hdr.sh_info; | |
7832 | ||
7833 | /* Set things up for objcopy and relocatable link. The output | |
7834 | SHT_GROUP section will have its elf_next_in_group pointing back | |
7835 | to the input group members. Ignore linker created group section. | |
7836 | See elfNN_ia64_object_p in elfxx-ia64.c. */ | |
7837 | if ((link_info == NULL | |
7838 | || !link_info->resolve_section_groups) | |
7839 | && (elf_sec_group (isec) == NULL | |
7840 | || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)) | |
7841 | { | |
7842 | if (elf_section_flags (isec) & SHF_GROUP) | |
7843 | elf_section_flags (osec) |= SHF_GROUP; | |
7844 | elf_next_in_group (osec) = elf_next_in_group (isec); | |
7845 | elf_section_data (osec)->group = elf_section_data (isec)->group; | |
7846 | } | |
7847 | ||
7848 | /* If not decompress, preserve SHF_COMPRESSED. */ | |
7849 | if (!final_link && (ibfd->flags & BFD_DECOMPRESS) == 0) | |
7850 | elf_section_flags (osec) |= (elf_section_flags (isec) | |
7851 | & SHF_COMPRESSED); | |
7852 | ||
7853 | ihdr = &elf_section_data (isec)->this_hdr; | |
7854 | ||
7855 | /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We | |
7856 | don't use the output section of the linked-to section since it | |
7857 | may be NULL at this point. */ | |
7858 | if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0) | |
7859 | { | |
7860 | ohdr = &elf_section_data (osec)->this_hdr; | |
7861 | ohdr->sh_flags |= SHF_LINK_ORDER; | |
7862 | elf_linked_to_section (osec) = elf_linked_to_section (isec); | |
7863 | } | |
7864 | ||
7865 | osec->use_rela_p = isec->use_rela_p; | |
7866 | ||
7867 | return true; | |
7868 | } | |
7869 | ||
7870 | /* Copy private section information. This copies over the entsize | |
7871 | field, and sometimes the info field. */ | |
7872 | ||
7873 | bool | |
7874 | _bfd_elf_copy_private_section_data (bfd *ibfd, | |
7875 | asection *isec, | |
7876 | bfd *obfd, | |
7877 | asection *osec) | |
7878 | { | |
7879 | Elf_Internal_Shdr *ihdr, *ohdr; | |
7880 | ||
7881 | if (ibfd->xvec->flavour != bfd_target_elf_flavour | |
7882 | || obfd->xvec->flavour != bfd_target_elf_flavour) | |
7883 | return true; | |
7884 | ||
7885 | ihdr = &elf_section_data (isec)->this_hdr; | |
7886 | ohdr = &elf_section_data (osec)->this_hdr; | |
7887 | ||
7888 | ohdr->sh_entsize = ihdr->sh_entsize; | |
7889 | ||
7890 | if (ihdr->sh_type == SHT_SYMTAB | |
7891 | || ihdr->sh_type == SHT_DYNSYM | |
7892 | || ihdr->sh_type == SHT_GNU_verneed | |
7893 | || ihdr->sh_type == SHT_GNU_verdef) | |
7894 | ohdr->sh_info = ihdr->sh_info; | |
7895 | ||
7896 | return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec, | |
7897 | NULL); | |
7898 | } | |
7899 | ||
7900 | /* Look at all the SHT_GROUP sections in IBFD, making any adjustments | |
7901 | necessary if we are removing either the SHT_GROUP section or any of | |
7902 | the group member sections. DISCARDED is the value that a section's | |
7903 | output_section has if the section will be discarded, NULL when this | |
7904 | function is called from objcopy, bfd_abs_section_ptr when called | |
7905 | from the linker. */ | |
7906 | ||
7907 | bool | |
7908 | _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded) | |
7909 | { | |
7910 | asection *isec; | |
7911 | ||
7912 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
7913 | if (elf_section_type (isec) == SHT_GROUP) | |
7914 | { | |
7915 | asection *first = elf_next_in_group (isec); | |
7916 | asection *s = first; | |
7917 | bfd_size_type removed = 0; | |
7918 | ||
7919 | while (s != NULL) | |
7920 | { | |
7921 | /* If this member section is being output but the | |
7922 | SHT_GROUP section is not, then clear the group info | |
7923 | set up by _bfd_elf_copy_private_section_data. */ | |
7924 | if (s->output_section != discarded | |
7925 | && isec->output_section == discarded) | |
7926 | { | |
7927 | elf_section_flags (s->output_section) &= ~SHF_GROUP; | |
7928 | elf_group_name (s->output_section) = NULL; | |
7929 | } | |
7930 | else | |
7931 | { | |
7932 | struct bfd_elf_section_data *elf_sec = elf_section_data (s); | |
7933 | if (s->output_section == discarded | |
7934 | && isec->output_section != discarded) | |
7935 | { | |
7936 | /* Conversely, if the member section is not being | |
7937 | output but the SHT_GROUP section is, then adjust | |
7938 | its size. */ | |
7939 | removed += 4; | |
7940 | if (elf_sec->rel.hdr != NULL | |
7941 | && (elf_sec->rel.hdr->sh_flags & SHF_GROUP) != 0) | |
7942 | removed += 4; | |
7943 | if (elf_sec->rela.hdr != NULL | |
7944 | && (elf_sec->rela.hdr->sh_flags & SHF_GROUP) != 0) | |
7945 | removed += 4; | |
7946 | } | |
7947 | else | |
7948 | { | |
7949 | /* Also adjust for zero-sized relocation member | |
7950 | section. */ | |
7951 | if (elf_sec->rel.hdr != NULL | |
7952 | && elf_sec->rel.hdr->sh_size == 0) | |
7953 | removed += 4; | |
7954 | if (elf_sec->rela.hdr != NULL | |
7955 | && elf_sec->rela.hdr->sh_size == 0) | |
7956 | removed += 4; | |
7957 | } | |
7958 | } | |
7959 | s = elf_next_in_group (s); | |
7960 | if (s == first) | |
7961 | break; | |
7962 | } | |
7963 | if (removed != 0) | |
7964 | { | |
7965 | if (discarded != NULL) | |
7966 | { | |
7967 | /* If we've been called for ld -r, then we need to | |
7968 | adjust the input section size. */ | |
7969 | if (isec->rawsize == 0) | |
7970 | isec->rawsize = isec->size; | |
7971 | isec->size = isec->rawsize - removed; | |
7972 | if (isec->size <= 4) | |
7973 | { | |
7974 | isec->size = 0; | |
7975 | isec->flags |= SEC_EXCLUDE; | |
7976 | } | |
7977 | } | |
7978 | else if (isec->output_section != NULL) | |
7979 | { | |
7980 | /* Adjust the output section size when called from | |
7981 | objcopy. */ | |
7982 | isec->output_section->size -= removed; | |
7983 | if (isec->output_section->size <= 4) | |
7984 | { | |
7985 | isec->output_section->size = 0; | |
7986 | isec->output_section->flags |= SEC_EXCLUDE; | |
7987 | } | |
7988 | } | |
7989 | } | |
7990 | } | |
7991 | ||
7992 | return true; | |
7993 | } | |
7994 | ||
7995 | /* Copy private header information. */ | |
7996 | ||
7997 | bool | |
7998 | _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd) | |
7999 | { | |
8000 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
8001 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
8002 | return true; | |
8003 | ||
8004 | /* Copy over private BFD data if it has not already been copied. | |
8005 | This must be done here, rather than in the copy_private_bfd_data | |
8006 | entry point, because the latter is called after the section | |
8007 | contents have been set, which means that the program headers have | |
8008 | already been worked out. */ | |
8009 | if (elf_seg_map (obfd) == NULL && elf_tdata (ibfd)->phdr != NULL) | |
8010 | { | |
8011 | if (! copy_private_bfd_data (ibfd, obfd)) | |
8012 | return false; | |
8013 | } | |
8014 | ||
8015 | return _bfd_elf_fixup_group_sections (ibfd, NULL); | |
8016 | } | |
8017 | ||
8018 | /* Copy private symbol information. If this symbol is in a section | |
8019 | which we did not map into a BFD section, try to map the section | |
8020 | index correctly. We use special macro definitions for the mapped | |
8021 | section indices; these definitions are interpreted by the | |
8022 | swap_out_syms function. */ | |
8023 | ||
8024 | #define MAP_ONESYMTAB (SHN_HIOS + 1) | |
8025 | #define MAP_DYNSYMTAB (SHN_HIOS + 2) | |
8026 | #define MAP_STRTAB (SHN_HIOS + 3) | |
8027 | #define MAP_SHSTRTAB (SHN_HIOS + 4) | |
8028 | #define MAP_SYM_SHNDX (SHN_HIOS + 5) | |
8029 | ||
8030 | bool | |
8031 | _bfd_elf_copy_private_symbol_data (bfd *ibfd, | |
8032 | asymbol *isymarg, | |
8033 | bfd *obfd, | |
8034 | asymbol *osymarg) | |
8035 | { | |
8036 | elf_symbol_type *isym, *osym; | |
8037 | ||
8038 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
8039 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
8040 | return true; | |
8041 | ||
8042 | isym = elf_symbol_from (isymarg); | |
8043 | osym = elf_symbol_from (osymarg); | |
8044 | ||
8045 | if (isym != NULL | |
8046 | && isym->internal_elf_sym.st_shndx != 0 | |
8047 | && osym != NULL | |
8048 | && bfd_is_abs_section (isym->symbol.section)) | |
8049 | { | |
8050 | unsigned int shndx; | |
8051 | ||
8052 | shndx = isym->internal_elf_sym.st_shndx; | |
8053 | if (shndx == elf_onesymtab (ibfd)) | |
8054 | shndx = MAP_ONESYMTAB; | |
8055 | else if (shndx == elf_dynsymtab (ibfd)) | |
8056 | shndx = MAP_DYNSYMTAB; | |
8057 | else if (shndx == elf_strtab_sec (ibfd)) | |
8058 | shndx = MAP_STRTAB; | |
8059 | else if (shndx == elf_shstrtab_sec (ibfd)) | |
8060 | shndx = MAP_SHSTRTAB; | |
8061 | else if (find_section_in_list (shndx, elf_symtab_shndx_list (ibfd))) | |
8062 | shndx = MAP_SYM_SHNDX; | |
8063 | osym->internal_elf_sym.st_shndx = shndx; | |
8064 | } | |
8065 | ||
8066 | return true; | |
8067 | } | |
8068 | ||
8069 | /* Swap out the symbols. */ | |
8070 | ||
8071 | static bool | |
8072 | swap_out_syms (bfd *abfd, | |
8073 | struct elf_strtab_hash **sttp, | |
8074 | int relocatable_p, | |
8075 | struct bfd_link_info *info) | |
8076 | { | |
8077 | const struct elf_backend_data *bed; | |
8078 | unsigned int symcount; | |
8079 | asymbol **syms; | |
8080 | struct elf_strtab_hash *stt; | |
8081 | Elf_Internal_Shdr *symtab_hdr; | |
8082 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
8083 | Elf_Internal_Shdr *symstrtab_hdr; | |
8084 | struct elf_sym_strtab *symstrtab; | |
8085 | bfd_byte *outbound_syms; | |
8086 | bfd_byte *outbound_shndx; | |
8087 | unsigned long outbound_syms_index; | |
8088 | unsigned int idx; | |
8089 | unsigned int num_locals; | |
8090 | size_t amt; | |
8091 | bool name_local_sections; | |
8092 | ||
8093 | if (!elf_map_symbols (abfd, &num_locals)) | |
8094 | return false; | |
8095 | ||
8096 | /* Dump out the symtabs. */ | |
8097 | stt = _bfd_elf_strtab_init (); | |
8098 | if (stt == NULL) | |
8099 | return false; | |
8100 | ||
8101 | bed = get_elf_backend_data (abfd); | |
8102 | symcount = bfd_get_symcount (abfd); | |
8103 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
8104 | symtab_hdr->sh_type = SHT_SYMTAB; | |
8105 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
8106 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
8107 | symtab_hdr->sh_info = num_locals + 1; | |
8108 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; | |
8109 | ||
8110 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
8111 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
8112 | ||
8113 | /* Allocate buffer to swap out the .strtab section. */ | |
8114 | if (_bfd_mul_overflow (symcount + 1, sizeof (*symstrtab), &amt) | |
8115 | || (symstrtab = (struct elf_sym_strtab *) bfd_malloc (amt)) == NULL) | |
8116 | { | |
8117 | bfd_set_error (bfd_error_no_memory); | |
8118 | _bfd_elf_strtab_free (stt); | |
8119 | return false; | |
8120 | } | |
8121 | ||
8122 | if (_bfd_mul_overflow (symcount + 1, bed->s->sizeof_sym, &amt) | |
8123 | || (outbound_syms = (bfd_byte *) bfd_alloc (abfd, amt)) == NULL) | |
8124 | { | |
8125 | error_no_mem: | |
8126 | bfd_set_error (bfd_error_no_memory); | |
8127 | error_return: | |
8128 | free (symstrtab); | |
8129 | _bfd_elf_strtab_free (stt); | |
8130 | return false; | |
8131 | } | |
8132 | symtab_hdr->contents = outbound_syms; | |
8133 | outbound_syms_index = 0; | |
8134 | ||
8135 | outbound_shndx = NULL; | |
8136 | ||
8137 | if (elf_symtab_shndx_list (abfd)) | |
8138 | { | |
8139 | symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; | |
8140 | if (symtab_shndx_hdr->sh_name != 0) | |
8141 | { | |
8142 | if (_bfd_mul_overflow (symcount + 1, | |
8143 | sizeof (Elf_External_Sym_Shndx), &amt)) | |
8144 | goto error_no_mem; | |
8145 | outbound_shndx = (bfd_byte *) bfd_zalloc (abfd, amt); | |
8146 | if (outbound_shndx == NULL) | |
8147 | goto error_return; | |
8148 | ||
8149 | symtab_shndx_hdr->contents = outbound_shndx; | |
8150 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
8151 | symtab_shndx_hdr->sh_size = amt; | |
8152 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
8153 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
8154 | } | |
8155 | /* FIXME: What about any other headers in the list ? */ | |
8156 | } | |
8157 | ||
8158 | /* Now generate the data (for "contents"). */ | |
8159 | { | |
8160 | /* Fill in zeroth symbol and swap it out. */ | |
8161 | Elf_Internal_Sym sym; | |
8162 | sym.st_name = 0; | |
8163 | sym.st_value = 0; | |
8164 | sym.st_size = 0; | |
8165 | sym.st_info = 0; | |
8166 | sym.st_other = 0; | |
8167 | sym.st_shndx = SHN_UNDEF; | |
8168 | sym.st_target_internal = 0; | |
8169 | symstrtab[0].sym = sym; | |
8170 | symstrtab[0].dest_index = outbound_syms_index; | |
8171 | outbound_syms_index++; | |
8172 | } | |
8173 | ||
8174 | name_local_sections | |
8175 | = (bed->elf_backend_name_local_section_symbols | |
8176 | && bed->elf_backend_name_local_section_symbols (abfd)); | |
8177 | ||
8178 | syms = bfd_get_outsymbols (abfd); | |
8179 | for (idx = 0; idx < symcount;) | |
8180 | { | |
8181 | Elf_Internal_Sym sym; | |
8182 | bfd_vma value = syms[idx]->value; | |
8183 | elf_symbol_type *type_ptr; | |
8184 | flagword flags = syms[idx]->flags; | |
8185 | int type; | |
8186 | ||
8187 | if (!name_local_sections | |
8188 | && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM) | |
8189 | { | |
8190 | /* Local section symbols have no name. */ | |
8191 | sym.st_name = (unsigned long) -1; | |
8192 | } | |
8193 | else | |
8194 | { | |
8195 | /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize | |
8196 | to get the final offset for st_name. */ | |
8197 | sym.st_name | |
8198 | = (unsigned long) _bfd_elf_strtab_add (stt, syms[idx]->name, | |
8199 | false); | |
8200 | if (sym.st_name == (unsigned long) -1) | |
8201 | goto error_return; | |
8202 | } | |
8203 | ||
8204 | type_ptr = elf_symbol_from (syms[idx]); | |
8205 | ||
8206 | if ((flags & BSF_SECTION_SYM) == 0 | |
8207 | && bfd_is_com_section (syms[idx]->section)) | |
8208 | { | |
8209 | /* ELF common symbols put the alignment into the `value' field, | |
8210 | and the size into the `size' field. This is backwards from | |
8211 | how BFD handles it, so reverse it here. */ | |
8212 | sym.st_size = value; | |
8213 | if (type_ptr == NULL | |
8214 | || type_ptr->internal_elf_sym.st_value == 0) | |
8215 | sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value)); | |
8216 | else | |
8217 | sym.st_value = type_ptr->internal_elf_sym.st_value; | |
8218 | sym.st_shndx = _bfd_elf_section_from_bfd_section | |
8219 | (abfd, syms[idx]->section); | |
8220 | } | |
8221 | else | |
8222 | { | |
8223 | asection *sec = syms[idx]->section; | |
8224 | unsigned int shndx; | |
8225 | ||
8226 | if (sec->output_section) | |
8227 | { | |
8228 | value += sec->output_offset; | |
8229 | sec = sec->output_section; | |
8230 | } | |
8231 | ||
8232 | /* Don't add in the section vma for relocatable output. */ | |
8233 | if (! relocatable_p) | |
8234 | value += sec->vma; | |
8235 | sym.st_value = value; | |
8236 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; | |
8237 | ||
8238 | if (bfd_is_abs_section (sec) | |
8239 | && type_ptr != NULL | |
8240 | && type_ptr->internal_elf_sym.st_shndx != 0) | |
8241 | { | |
8242 | /* This symbol is in a real ELF section which we did | |
8243 | not create as a BFD section. Undo the mapping done | |
8244 | by copy_private_symbol_data. */ | |
8245 | shndx = type_ptr->internal_elf_sym.st_shndx; | |
8246 | switch (shndx) | |
8247 | { | |
8248 | case MAP_ONESYMTAB: | |
8249 | shndx = elf_onesymtab (abfd); | |
8250 | break; | |
8251 | case MAP_DYNSYMTAB: | |
8252 | shndx = elf_dynsymtab (abfd); | |
8253 | break; | |
8254 | case MAP_STRTAB: | |
8255 | shndx = elf_strtab_sec (abfd); | |
8256 | break; | |
8257 | case MAP_SHSTRTAB: | |
8258 | shndx = elf_shstrtab_sec (abfd); | |
8259 | break; | |
8260 | case MAP_SYM_SHNDX: | |
8261 | if (elf_symtab_shndx_list (abfd)) | |
8262 | shndx = elf_symtab_shndx_list (abfd)->ndx; | |
8263 | break; | |
8264 | case SHN_COMMON: | |
8265 | case SHN_ABS: | |
8266 | shndx = SHN_ABS; | |
8267 | break; | |
8268 | default: | |
8269 | if (shndx >= SHN_LOPROC && shndx <= SHN_HIOS) | |
8270 | { | |
8271 | if (bed->symbol_section_index) | |
8272 | shndx = bed->symbol_section_index (abfd, type_ptr); | |
8273 | /* Otherwise just leave the index alone. */ | |
8274 | } | |
8275 | else | |
8276 | { | |
8277 | if (shndx > SHN_HIOS && shndx < SHN_HIRESERVE) | |
8278 | _bfd_error_handler (_("%pB: \ | |
8279 | Unable to handle section index %x in ELF symbol. Using ABS instead."), | |
8280 | abfd, shndx); | |
8281 | shndx = SHN_ABS; | |
8282 | } | |
8283 | break; | |
8284 | } | |
8285 | } | |
8286 | else | |
8287 | { | |
8288 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
8289 | ||
8290 | if (shndx == SHN_BAD) | |
8291 | { | |
8292 | asection *sec2; | |
8293 | ||
8294 | /* Writing this would be a hell of a lot easier if | |
8295 | we had some decent documentation on bfd, and | |
8296 | knew what to expect of the library, and what to | |
8297 | demand of applications. For example, it | |
8298 | appears that `objcopy' might not set the | |
8299 | section of a symbol to be a section that is | |
8300 | actually in the output file. */ | |
8301 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
8302 | if (sec2 != NULL) | |
8303 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec2); | |
8304 | if (shndx == SHN_BAD) | |
8305 | { | |
8306 | /* xgettext:c-format */ | |
8307 | _bfd_error_handler | |
8308 | (_("unable to find equivalent output section" | |
8309 | " for symbol '%s' from section '%s'"), | |
8310 | syms[idx]->name ? syms[idx]->name : "<Local sym>", | |
8311 | sec->name); | |
8312 | bfd_set_error (bfd_error_invalid_operation); | |
8313 | goto error_return; | |
8314 | } | |
8315 | } | |
8316 | } | |
8317 | ||
8318 | sym.st_shndx = shndx; | |
8319 | } | |
8320 | ||
8321 | if ((flags & BSF_THREAD_LOCAL) != 0) | |
8322 | type = STT_TLS; | |
8323 | else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0) | |
8324 | type = STT_GNU_IFUNC; | |
8325 | else if ((flags & BSF_FUNCTION) != 0) | |
8326 | type = STT_FUNC; | |
8327 | else if ((flags & BSF_OBJECT) != 0) | |
8328 | type = STT_OBJECT; | |
8329 | else if ((flags & BSF_RELC) != 0) | |
8330 | type = STT_RELC; | |
8331 | else if ((flags & BSF_SRELC) != 0) | |
8332 | type = STT_SRELC; | |
8333 | else | |
8334 | type = STT_NOTYPE; | |
8335 | ||
8336 | if (syms[idx]->section->flags & SEC_THREAD_LOCAL) | |
8337 | type = STT_TLS; | |
8338 | ||
8339 | /* Processor-specific types. */ | |
8340 | if (type_ptr != NULL | |
8341 | && bed->elf_backend_get_symbol_type) | |
8342 | type = ((*bed->elf_backend_get_symbol_type) | |
8343 | (&type_ptr->internal_elf_sym, type)); | |
8344 | ||
8345 | if (flags & BSF_SECTION_SYM) | |
8346 | { | |
8347 | if (flags & BSF_GLOBAL) | |
8348 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); | |
8349 | else | |
8350 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
8351 | } | |
8352 | else if (bfd_is_com_section (syms[idx]->section)) | |
8353 | { | |
8354 | if (type != STT_TLS) | |
8355 | { | |
8356 | if ((abfd->flags & BFD_CONVERT_ELF_COMMON)) | |
8357 | type = ((abfd->flags & BFD_USE_ELF_STT_COMMON) | |
8358 | ? STT_COMMON : STT_OBJECT); | |
8359 | else | |
8360 | type = ((flags & BSF_ELF_COMMON) != 0 | |
8361 | ? STT_COMMON : STT_OBJECT); | |
8362 | } | |
8363 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); | |
8364 | } | |
8365 | else if (bfd_is_und_section (syms[idx]->section)) | |
8366 | sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK) | |
8367 | ? STB_WEAK | |
8368 | : STB_GLOBAL), | |
8369 | type); | |
8370 | else if (flags & BSF_FILE) | |
8371 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
8372 | else | |
8373 | { | |
8374 | int bind = STB_LOCAL; | |
8375 | ||
8376 | if (flags & BSF_LOCAL) | |
8377 | bind = STB_LOCAL; | |
8378 | else if (flags & BSF_GNU_UNIQUE) | |
8379 | bind = STB_GNU_UNIQUE; | |
8380 | else if (flags & BSF_WEAK) | |
8381 | bind = STB_WEAK; | |
8382 | else if (flags & BSF_GLOBAL) | |
8383 | bind = STB_GLOBAL; | |
8384 | ||
8385 | sym.st_info = ELF_ST_INFO (bind, type); | |
8386 | } | |
8387 | ||
8388 | if (type_ptr != NULL) | |
8389 | { | |
8390 | sym.st_other = type_ptr->internal_elf_sym.st_other; | |
8391 | sym.st_target_internal | |
8392 | = type_ptr->internal_elf_sym.st_target_internal; | |
8393 | } | |
8394 | else | |
8395 | { | |
8396 | sym.st_other = 0; | |
8397 | sym.st_target_internal = 0; | |
8398 | } | |
8399 | ||
8400 | idx++; | |
8401 | symstrtab[idx].sym = sym; | |
8402 | symstrtab[idx].dest_index = outbound_syms_index; | |
8403 | ||
8404 | outbound_syms_index++; | |
8405 | } | |
8406 | ||
8407 | /* Finalize the .strtab section. */ | |
8408 | _bfd_elf_strtab_finalize (stt); | |
8409 | ||
8410 | /* Swap out the .strtab section. */ | |
8411 | for (idx = 0; idx <= symcount; idx++) | |
8412 | { | |
8413 | struct elf_sym_strtab *elfsym = &symstrtab[idx]; | |
8414 | if (elfsym->sym.st_name == (unsigned long) -1) | |
8415 | elfsym->sym.st_name = 0; | |
8416 | else | |
8417 | elfsym->sym.st_name = _bfd_elf_strtab_offset (stt, | |
8418 | elfsym->sym.st_name); | |
8419 | if (info && info->callbacks->ctf_new_symbol) | |
8420 | info->callbacks->ctf_new_symbol (elfsym->dest_index, | |
8421 | &elfsym->sym); | |
8422 | ||
8423 | /* Inform the linker of the addition of this symbol. */ | |
8424 | ||
8425 | bed->s->swap_symbol_out (abfd, &elfsym->sym, | |
8426 | (outbound_syms | |
8427 | + (elfsym->dest_index | |
8428 | * bed->s->sizeof_sym)), | |
8429 | NPTR_ADD (outbound_shndx, | |
8430 | (elfsym->dest_index | |
8431 | * sizeof (Elf_External_Sym_Shndx)))); | |
8432 | } | |
8433 | free (symstrtab); | |
8434 | ||
8435 | *sttp = stt; | |
8436 | symstrtab_hdr->sh_size = _bfd_elf_strtab_size (stt); | |
8437 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
8438 | symstrtab_hdr->sh_flags = bed->elf_strtab_flags; | |
8439 | symstrtab_hdr->sh_addr = 0; | |
8440 | symstrtab_hdr->sh_entsize = 0; | |
8441 | symstrtab_hdr->sh_link = 0; | |
8442 | symstrtab_hdr->sh_info = 0; | |
8443 | symstrtab_hdr->sh_addralign = 1; | |
8444 | ||
8445 | return true; | |
8446 | } | |
8447 | ||
8448 | /* Return the number of bytes required to hold the symtab vector. | |
8449 | ||
8450 | Note that we base it on the count plus 1, since we will null terminate | |
8451 | the vector allocated based on this size. However, the ELF symbol table | |
8452 | always has a dummy entry as symbol #0, so it ends up even. */ | |
8453 | ||
8454 | long | |
8455 | _bfd_elf_get_symtab_upper_bound (bfd *abfd) | |
8456 | { | |
8457 | bfd_size_type symcount; | |
8458 | long symtab_size; | |
8459 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; | |
8460 | ||
8461 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
8462 | if (symcount > LONG_MAX / sizeof (asymbol *)) | |
8463 | { | |
8464 | bfd_set_error (bfd_error_file_too_big); | |
8465 | return -1; | |
8466 | } | |
8467 | symtab_size = symcount * (sizeof (asymbol *)); | |
8468 | if (symcount == 0) | |
8469 | symtab_size = sizeof (asymbol *); | |
8470 | else if (!bfd_write_p (abfd)) | |
8471 | { | |
8472 | ufile_ptr filesize = bfd_get_file_size (abfd); | |
8473 | ||
8474 | if (filesize != 0 && (unsigned long) symtab_size > filesize) | |
8475 | { | |
8476 | bfd_set_error (bfd_error_file_truncated); | |
8477 | return -1; | |
8478 | } | |
8479 | } | |
8480 | ||
8481 | return symtab_size; | |
8482 | } | |
8483 | ||
8484 | long | |
8485 | _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd) | |
8486 | { | |
8487 | bfd_size_type symcount; | |
8488 | long symtab_size; | |
8489 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
8490 | ||
8491 | if (elf_dynsymtab (abfd) == 0) | |
8492 | { | |
8493 | bfd_set_error (bfd_error_invalid_operation); | |
8494 | return -1; | |
8495 | } | |
8496 | ||
8497 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
8498 | if (symcount > LONG_MAX / sizeof (asymbol *)) | |
8499 | { | |
8500 | bfd_set_error (bfd_error_file_too_big); | |
8501 | return -1; | |
8502 | } | |
8503 | symtab_size = symcount * (sizeof (asymbol *)); | |
8504 | if (symcount == 0) | |
8505 | symtab_size = sizeof (asymbol *); | |
8506 | else if (!bfd_write_p (abfd)) | |
8507 | { | |
8508 | ufile_ptr filesize = bfd_get_file_size (abfd); | |
8509 | ||
8510 | if (filesize != 0 && (unsigned long) symtab_size > filesize) | |
8511 | { | |
8512 | bfd_set_error (bfd_error_file_truncated); | |
8513 | return -1; | |
8514 | } | |
8515 | } | |
8516 | ||
8517 | return symtab_size; | |
8518 | } | |
8519 | ||
8520 | long | |
8521 | _bfd_elf_get_reloc_upper_bound (bfd *abfd, sec_ptr asect) | |
8522 | { | |
8523 | if (asect->reloc_count != 0 && !bfd_write_p (abfd)) | |
8524 | { | |
8525 | /* Sanity check reloc section size. */ | |
8526 | struct bfd_elf_section_data *d = elf_section_data (asect); | |
8527 | Elf_Internal_Shdr *rel_hdr = &d->this_hdr; | |
8528 | bfd_size_type ext_rel_size = rel_hdr->sh_size; | |
8529 | ufile_ptr filesize = bfd_get_file_size (abfd); | |
8530 | ||
8531 | if (filesize != 0 && ext_rel_size > filesize) | |
8532 | { | |
8533 | bfd_set_error (bfd_error_file_truncated); | |
8534 | return -1; | |
8535 | } | |
8536 | } | |
8537 | ||
8538 | #if SIZEOF_LONG == SIZEOF_INT | |
8539 | if (asect->reloc_count >= LONG_MAX / sizeof (arelent *)) | |
8540 | { | |
8541 | bfd_set_error (bfd_error_file_too_big); | |
8542 | return -1; | |
8543 | } | |
8544 | #endif | |
8545 | return (asect->reloc_count + 1L) * sizeof (arelent *); | |
8546 | } | |
8547 | ||
8548 | /* Canonicalize the relocs. */ | |
8549 | ||
8550 | long | |
8551 | _bfd_elf_canonicalize_reloc (bfd *abfd, | |
8552 | sec_ptr section, | |
8553 | arelent **relptr, | |
8554 | asymbol **symbols) | |
8555 | { | |
8556 | arelent *tblptr; | |
8557 | unsigned int i; | |
8558 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8559 | ||
8560 | if (! bed->s->slurp_reloc_table (abfd, section, symbols, false)) | |
8561 | return -1; | |
8562 | ||
8563 | tblptr = section->relocation; | |
8564 | for (i = 0; i < section->reloc_count; i++) | |
8565 | *relptr++ = tblptr++; | |
8566 | ||
8567 | *relptr = NULL; | |
8568 | ||
8569 | return section->reloc_count; | |
8570 | } | |
8571 | ||
8572 | long | |
8573 | _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation) | |
8574 | { | |
8575 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8576 | long symcount = bed->s->slurp_symbol_table (abfd, allocation, false); | |
8577 | ||
8578 | if (symcount >= 0) | |
8579 | abfd->symcount = symcount; | |
8580 | return symcount; | |
8581 | } | |
8582 | ||
8583 | long | |
8584 | _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd, | |
8585 | asymbol **allocation) | |
8586 | { | |
8587 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8588 | long symcount = bed->s->slurp_symbol_table (abfd, allocation, true); | |
8589 | ||
8590 | if (symcount >= 0) | |
8591 | abfd->dynsymcount = symcount; | |
8592 | return symcount; | |
8593 | } | |
8594 | ||
8595 | /* Return the size required for the dynamic reloc entries. Any loadable | |
8596 | section that was actually installed in the BFD, and has type SHT_REL | |
8597 | or SHT_RELA, and uses the dynamic symbol table, is considered to be a | |
8598 | dynamic reloc section. */ | |
8599 | ||
8600 | long | |
8601 | _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd) | |
8602 | { | |
8603 | bfd_size_type count, ext_rel_size; | |
8604 | asection *s; | |
8605 | ||
8606 | if (elf_dynsymtab (abfd) == 0) | |
8607 | { | |
8608 | bfd_set_error (bfd_error_invalid_operation); | |
8609 | return -1; | |
8610 | } | |
8611 | ||
8612 | count = 1; | |
8613 | ext_rel_size = 0; | |
8614 | for (s = abfd->sections; s != NULL; s = s->next) | |
8615 | if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) | |
8616 | && (elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
8617 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) | |
8618 | { | |
8619 | ext_rel_size += s->size; | |
8620 | if (ext_rel_size < s->size) | |
8621 | { | |
8622 | bfd_set_error (bfd_error_file_truncated); | |
8623 | return -1; | |
8624 | } | |
8625 | count += s->size / elf_section_data (s)->this_hdr.sh_entsize; | |
8626 | if (count > LONG_MAX / sizeof (arelent *)) | |
8627 | { | |
8628 | bfd_set_error (bfd_error_file_too_big); | |
8629 | return -1; | |
8630 | } | |
8631 | } | |
8632 | if (count > 1 && !bfd_write_p (abfd)) | |
8633 | { | |
8634 | /* Sanity check reloc section sizes. */ | |
8635 | ufile_ptr filesize = bfd_get_file_size (abfd); | |
8636 | if (filesize != 0 && ext_rel_size > filesize) | |
8637 | { | |
8638 | bfd_set_error (bfd_error_file_truncated); | |
8639 | return -1; | |
8640 | } | |
8641 | } | |
8642 | return count * sizeof (arelent *); | |
8643 | } | |
8644 | ||
8645 | /* Canonicalize the dynamic relocation entries. Note that we return the | |
8646 | dynamic relocations as a single block, although they are actually | |
8647 | associated with particular sections; the interface, which was | |
8648 | designed for SunOS style shared libraries, expects that there is only | |
8649 | one set of dynamic relocs. Any loadable section that was actually | |
8650 | installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the | |
8651 | dynamic symbol table, is considered to be a dynamic reloc section. */ | |
8652 | ||
8653 | long | |
8654 | _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd, | |
8655 | arelent **storage, | |
8656 | asymbol **syms) | |
8657 | { | |
8658 | bool (*slurp_relocs) (bfd *, asection *, asymbol **, bool); | |
8659 | asection *s; | |
8660 | long ret; | |
8661 | ||
8662 | if (elf_dynsymtab (abfd) == 0) | |
8663 | { | |
8664 | bfd_set_error (bfd_error_invalid_operation); | |
8665 | return -1; | |
8666 | } | |
8667 | ||
8668 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; | |
8669 | ret = 0; | |
8670 | for (s = abfd->sections; s != NULL; s = s->next) | |
8671 | { | |
8672 | if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) | |
8673 | && (elf_section_data (s)->this_hdr.sh_type == SHT_REL | |
8674 | || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) | |
8675 | { | |
8676 | arelent *p; | |
8677 | long count, i; | |
8678 | ||
8679 | if (! (*slurp_relocs) (abfd, s, syms, true)) | |
8680 | return -1; | |
8681 | count = s->size / elf_section_data (s)->this_hdr.sh_entsize; | |
8682 | p = s->relocation; | |
8683 | for (i = 0; i < count; i++) | |
8684 | *storage++ = p++; | |
8685 | ret += count; | |
8686 | } | |
8687 | } | |
8688 | ||
8689 | *storage = NULL; | |
8690 | ||
8691 | return ret; | |
8692 | } | |
8693 | \f | |
8694 | /* Read in the version information. */ | |
8695 | ||
8696 | bool | |
8697 | _bfd_elf_slurp_version_tables (bfd *abfd, bool default_imported_symver) | |
8698 | { | |
8699 | bfd_byte *contents = NULL; | |
8700 | unsigned int freeidx = 0; | |
8701 | size_t amt; | |
8702 | ||
8703 | if (elf_dynverref (abfd) != 0) | |
8704 | { | |
8705 | Elf_Internal_Shdr *hdr; | |
8706 | Elf_External_Verneed *everneed; | |
8707 | Elf_Internal_Verneed *iverneed; | |
8708 | unsigned int i; | |
8709 | bfd_byte *contents_end; | |
8710 | ||
8711 | hdr = &elf_tdata (abfd)->dynverref_hdr; | |
8712 | ||
8713 | if (hdr->sh_info == 0 | |
8714 | || hdr->sh_info > hdr->sh_size / sizeof (Elf_External_Verneed)) | |
8715 | { | |
8716 | error_return_bad_verref: | |
8717 | _bfd_error_handler | |
8718 | (_("%pB: .gnu.version_r invalid entry"), abfd); | |
8719 | bfd_set_error (bfd_error_bad_value); | |
8720 | error_return_verref: | |
8721 | elf_tdata (abfd)->verref = NULL; | |
8722 | elf_tdata (abfd)->cverrefs = 0; | |
8723 | goto error_return; | |
8724 | } | |
8725 | ||
8726 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0) | |
8727 | goto error_return_verref; | |
8728 | contents = _bfd_malloc_and_read (abfd, hdr->sh_size, hdr->sh_size); | |
8729 | if (contents == NULL) | |
8730 | goto error_return_verref; | |
8731 | ||
8732 | if (_bfd_mul_overflow (hdr->sh_info, sizeof (Elf_Internal_Verneed), &amt)) | |
8733 | { | |
8734 | bfd_set_error (bfd_error_file_too_big); | |
8735 | goto error_return_verref; | |
8736 | } | |
8737 | elf_tdata (abfd)->verref = (Elf_Internal_Verneed *) bfd_alloc (abfd, amt); | |
8738 | if (elf_tdata (abfd)->verref == NULL) | |
8739 | goto error_return_verref; | |
8740 | ||
8741 | BFD_ASSERT (sizeof (Elf_External_Verneed) | |
8742 | == sizeof (Elf_External_Vernaux)); | |
8743 | contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed); | |
8744 | everneed = (Elf_External_Verneed *) contents; | |
8745 | iverneed = elf_tdata (abfd)->verref; | |
8746 | for (i = 0; i < hdr->sh_info; i++, iverneed++) | |
8747 | { | |
8748 | Elf_External_Vernaux *evernaux; | |
8749 | Elf_Internal_Vernaux *ivernaux; | |
8750 | unsigned int j; | |
8751 | ||
8752 | _bfd_elf_swap_verneed_in (abfd, everneed, iverneed); | |
8753 | ||
8754 | iverneed->vn_bfd = abfd; | |
8755 | ||
8756 | iverneed->vn_filename = | |
8757 | bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
8758 | iverneed->vn_file); | |
8759 | if (iverneed->vn_filename == NULL) | |
8760 | goto error_return_bad_verref; | |
8761 | ||
8762 | if (iverneed->vn_cnt == 0) | |
8763 | iverneed->vn_auxptr = NULL; | |
8764 | else | |
8765 | { | |
8766 | if (_bfd_mul_overflow (iverneed->vn_cnt, | |
8767 | sizeof (Elf_Internal_Vernaux), &amt)) | |
8768 | { | |
8769 | bfd_set_error (bfd_error_file_too_big); | |
8770 | goto error_return_verref; | |
8771 | } | |
8772 | iverneed->vn_auxptr = (struct elf_internal_vernaux *) | |
8773 | bfd_alloc (abfd, amt); | |
8774 | if (iverneed->vn_auxptr == NULL) | |
8775 | goto error_return_verref; | |
8776 | } | |
8777 | ||
8778 | if (iverneed->vn_aux | |
8779 | > (size_t) (contents_end - (bfd_byte *) everneed)) | |
8780 | goto error_return_bad_verref; | |
8781 | ||
8782 | evernaux = ((Elf_External_Vernaux *) | |
8783 | ((bfd_byte *) everneed + iverneed->vn_aux)); | |
8784 | ivernaux = iverneed->vn_auxptr; | |
8785 | for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++) | |
8786 | { | |
8787 | _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux); | |
8788 | ||
8789 | ivernaux->vna_nodename = | |
8790 | bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
8791 | ivernaux->vna_name); | |
8792 | if (ivernaux->vna_nodename == NULL) | |
8793 | goto error_return_bad_verref; | |
8794 | ||
8795 | if (ivernaux->vna_other > freeidx) | |
8796 | freeidx = ivernaux->vna_other; | |
8797 | ||
8798 | ivernaux->vna_nextptr = NULL; | |
8799 | if (ivernaux->vna_next == 0) | |
8800 | { | |
8801 | iverneed->vn_cnt = j + 1; | |
8802 | break; | |
8803 | } | |
8804 | if (j + 1 < iverneed->vn_cnt) | |
8805 | ivernaux->vna_nextptr = ivernaux + 1; | |
8806 | ||
8807 | if (ivernaux->vna_next | |
8808 | > (size_t) (contents_end - (bfd_byte *) evernaux)) | |
8809 | goto error_return_bad_verref; | |
8810 | ||
8811 | evernaux = ((Elf_External_Vernaux *) | |
8812 | ((bfd_byte *) evernaux + ivernaux->vna_next)); | |
8813 | } | |
8814 | ||
8815 | iverneed->vn_nextref = NULL; | |
8816 | if (iverneed->vn_next == 0) | |
8817 | break; | |
8818 | if (i + 1 < hdr->sh_info) | |
8819 | iverneed->vn_nextref = iverneed + 1; | |
8820 | ||
8821 | if (iverneed->vn_next | |
8822 | > (size_t) (contents_end - (bfd_byte *) everneed)) | |
8823 | goto error_return_bad_verref; | |
8824 | ||
8825 | everneed = ((Elf_External_Verneed *) | |
8826 | ((bfd_byte *) everneed + iverneed->vn_next)); | |
8827 | } | |
8828 | elf_tdata (abfd)->cverrefs = i; | |
8829 | ||
8830 | free (contents); | |
8831 | contents = NULL; | |
8832 | } | |
8833 | ||
8834 | if (elf_dynverdef (abfd) != 0) | |
8835 | { | |
8836 | Elf_Internal_Shdr *hdr; | |
8837 | Elf_External_Verdef *everdef; | |
8838 | Elf_Internal_Verdef *iverdef; | |
8839 | Elf_Internal_Verdef *iverdefarr; | |
8840 | Elf_Internal_Verdef iverdefmem; | |
8841 | unsigned int i; | |
8842 | unsigned int maxidx; | |
8843 | bfd_byte *contents_end_def, *contents_end_aux; | |
8844 | ||
8845 | hdr = &elf_tdata (abfd)->dynverdef_hdr; | |
8846 | ||
8847 | if (hdr->sh_info == 0 || hdr->sh_size < sizeof (Elf_External_Verdef)) | |
8848 | { | |
8849 | error_return_bad_verdef: | |
8850 | _bfd_error_handler | |
8851 | (_("%pB: .gnu.version_d invalid entry"), abfd); | |
8852 | bfd_set_error (bfd_error_bad_value); | |
8853 | error_return_verdef: | |
8854 | elf_tdata (abfd)->verdef = NULL; | |
8855 | elf_tdata (abfd)->cverdefs = 0; | |
8856 | goto error_return; | |
8857 | } | |
8858 | ||
8859 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0) | |
8860 | goto error_return_verdef; | |
8861 | contents = _bfd_malloc_and_read (abfd, hdr->sh_size, hdr->sh_size); | |
8862 | if (contents == NULL) | |
8863 | goto error_return_verdef; | |
8864 | ||
8865 | BFD_ASSERT (sizeof (Elf_External_Verdef) | |
8866 | >= sizeof (Elf_External_Verdaux)); | |
8867 | contents_end_def = contents + hdr->sh_size | |
8868 | - sizeof (Elf_External_Verdef); | |
8869 | contents_end_aux = contents + hdr->sh_size | |
8870 | - sizeof (Elf_External_Verdaux); | |
8871 | ||
8872 | /* We know the number of entries in the section but not the maximum | |
8873 | index. Therefore we have to run through all entries and find | |
8874 | the maximum. */ | |
8875 | everdef = (Elf_External_Verdef *) contents; | |
8876 | maxidx = 0; | |
8877 | for (i = 0; i < hdr->sh_info; ++i) | |
8878 | { | |
8879 | _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem); | |
8880 | ||
8881 | if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) == 0) | |
8882 | goto error_return_bad_verdef; | |
8883 | if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx) | |
8884 | maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION); | |
8885 | ||
8886 | if (iverdefmem.vd_next == 0) | |
8887 | break; | |
8888 | ||
8889 | if (iverdefmem.vd_next | |
8890 | > (size_t) (contents_end_def - (bfd_byte *) everdef)) | |
8891 | goto error_return_bad_verdef; | |
8892 | ||
8893 | everdef = ((Elf_External_Verdef *) | |
8894 | ((bfd_byte *) everdef + iverdefmem.vd_next)); | |
8895 | } | |
8896 | ||
8897 | if (default_imported_symver) | |
8898 | { | |
8899 | if (freeidx > maxidx) | |
8900 | maxidx = ++freeidx; | |
8901 | else | |
8902 | freeidx = ++maxidx; | |
8903 | } | |
8904 | if (_bfd_mul_overflow (maxidx, sizeof (Elf_Internal_Verdef), &amt)) | |
8905 | { | |
8906 | bfd_set_error (bfd_error_file_too_big); | |
8907 | goto error_return_verdef; | |
8908 | } | |
8909 | elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt); | |
8910 | if (elf_tdata (abfd)->verdef == NULL) | |
8911 | goto error_return_verdef; | |
8912 | ||
8913 | elf_tdata (abfd)->cverdefs = maxidx; | |
8914 | ||
8915 | everdef = (Elf_External_Verdef *) contents; | |
8916 | iverdefarr = elf_tdata (abfd)->verdef; | |
8917 | for (i = 0; i < hdr->sh_info; i++) | |
8918 | { | |
8919 | Elf_External_Verdaux *everdaux; | |
8920 | Elf_Internal_Verdaux *iverdaux; | |
8921 | unsigned int j; | |
8922 | ||
8923 | _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem); | |
8924 | ||
8925 | if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0) | |
8926 | goto error_return_bad_verdef; | |
8927 | ||
8928 | iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1]; | |
8929 | memcpy (iverdef, &iverdefmem, offsetof (Elf_Internal_Verdef, vd_bfd)); | |
8930 | ||
8931 | iverdef->vd_bfd = abfd; | |
8932 | ||
8933 | if (iverdef->vd_cnt == 0) | |
8934 | iverdef->vd_auxptr = NULL; | |
8935 | else | |
8936 | { | |
8937 | if (_bfd_mul_overflow (iverdef->vd_cnt, | |
8938 | sizeof (Elf_Internal_Verdaux), &amt)) | |
8939 | { | |
8940 | bfd_set_error (bfd_error_file_too_big); | |
8941 | goto error_return_verdef; | |
8942 | } | |
8943 | iverdef->vd_auxptr = (struct elf_internal_verdaux *) | |
8944 | bfd_alloc (abfd, amt); | |
8945 | if (iverdef->vd_auxptr == NULL) | |
8946 | goto error_return_verdef; | |
8947 | } | |
8948 | ||
8949 | if (iverdef->vd_aux | |
8950 | > (size_t) (contents_end_aux - (bfd_byte *) everdef)) | |
8951 | goto error_return_bad_verdef; | |
8952 | ||
8953 | everdaux = ((Elf_External_Verdaux *) | |
8954 | ((bfd_byte *) everdef + iverdef->vd_aux)); | |
8955 | iverdaux = iverdef->vd_auxptr; | |
8956 | for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++) | |
8957 | { | |
8958 | _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux); | |
8959 | ||
8960 | iverdaux->vda_nodename = | |
8961 | bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
8962 | iverdaux->vda_name); | |
8963 | if (iverdaux->vda_nodename == NULL) | |
8964 | goto error_return_bad_verdef; | |
8965 | ||
8966 | iverdaux->vda_nextptr = NULL; | |
8967 | if (iverdaux->vda_next == 0) | |
8968 | { | |
8969 | iverdef->vd_cnt = j + 1; | |
8970 | break; | |
8971 | } | |
8972 | if (j + 1 < iverdef->vd_cnt) | |
8973 | iverdaux->vda_nextptr = iverdaux + 1; | |
8974 | ||
8975 | if (iverdaux->vda_next | |
8976 | > (size_t) (contents_end_aux - (bfd_byte *) everdaux)) | |
8977 | goto error_return_bad_verdef; | |
8978 | ||
8979 | everdaux = ((Elf_External_Verdaux *) | |
8980 | ((bfd_byte *) everdaux + iverdaux->vda_next)); | |
8981 | } | |
8982 | ||
8983 | iverdef->vd_nodename = NULL; | |
8984 | if (iverdef->vd_cnt) | |
8985 | iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename; | |
8986 | ||
8987 | iverdef->vd_nextdef = NULL; | |
8988 | if (iverdef->vd_next == 0) | |
8989 | break; | |
8990 | if ((size_t) (iverdef - iverdefarr) + 1 < maxidx) | |
8991 | iverdef->vd_nextdef = iverdef + 1; | |
8992 | ||
8993 | everdef = ((Elf_External_Verdef *) | |
8994 | ((bfd_byte *) everdef + iverdef->vd_next)); | |
8995 | } | |
8996 | ||
8997 | free (contents); | |
8998 | contents = NULL; | |
8999 | } | |
9000 | else if (default_imported_symver) | |
9001 | { | |
9002 | if (freeidx < 3) | |
9003 | freeidx = 3; | |
9004 | else | |
9005 | freeidx++; | |
9006 | ||
9007 | if (_bfd_mul_overflow (freeidx, sizeof (Elf_Internal_Verdef), &amt)) | |
9008 | { | |
9009 | bfd_set_error (bfd_error_file_too_big); | |
9010 | goto error_return; | |
9011 | } | |
9012 | elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt); | |
9013 | if (elf_tdata (abfd)->verdef == NULL) | |
9014 | goto error_return; | |
9015 | ||
9016 | elf_tdata (abfd)->cverdefs = freeidx; | |
9017 | } | |
9018 | ||
9019 | /* Create a default version based on the soname. */ | |
9020 | if (default_imported_symver) | |
9021 | { | |
9022 | Elf_Internal_Verdef *iverdef; | |
9023 | Elf_Internal_Verdaux *iverdaux; | |
9024 | ||
9025 | iverdef = &elf_tdata (abfd)->verdef[freeidx - 1]; | |
9026 | ||
9027 | iverdef->vd_version = VER_DEF_CURRENT; | |
9028 | iverdef->vd_flags = 0; | |
9029 | iverdef->vd_ndx = freeidx; | |
9030 | iverdef->vd_cnt = 1; | |
9031 | ||
9032 | iverdef->vd_bfd = abfd; | |
9033 | ||
9034 | iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd); | |
9035 | if (iverdef->vd_nodename == NULL) | |
9036 | goto error_return_verdef; | |
9037 | iverdef->vd_nextdef = NULL; | |
9038 | iverdef->vd_auxptr = ((struct elf_internal_verdaux *) | |
9039 | bfd_zalloc (abfd, sizeof (Elf_Internal_Verdaux))); | |
9040 | if (iverdef->vd_auxptr == NULL) | |
9041 | goto error_return_verdef; | |
9042 | ||
9043 | iverdaux = iverdef->vd_auxptr; | |
9044 | iverdaux->vda_nodename = iverdef->vd_nodename; | |
9045 | } | |
9046 | ||
9047 | return true; | |
9048 | ||
9049 | error_return: | |
9050 | free (contents); | |
9051 | return false; | |
9052 | } | |
9053 | \f | |
9054 | asymbol * | |
9055 | _bfd_elf_make_empty_symbol (bfd *abfd) | |
9056 | { | |
9057 | elf_symbol_type *newsym; | |
9058 | ||
9059 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (*newsym)); | |
9060 | if (!newsym) | |
9061 | return NULL; | |
9062 | newsym->symbol.the_bfd = abfd; | |
9063 | return &newsym->symbol; | |
9064 | } | |
9065 | ||
9066 | void | |
9067 | _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, | |
9068 | asymbol *symbol, | |
9069 | symbol_info *ret) | |
9070 | { | |
9071 | bfd_symbol_info (symbol, ret); | |
9072 | } | |
9073 | ||
9074 | /* Return whether a symbol name implies a local symbol. Most targets | |
9075 | use this function for the is_local_label_name entry point, but some | |
9076 | override it. */ | |
9077 | ||
9078 | bool | |
9079 | _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, | |
9080 | const char *name) | |
9081 | { | |
9082 | /* Normal local symbols start with ``.L''. */ | |
9083 | if (name[0] == '.' && name[1] == 'L') | |
9084 | return true; | |
9085 | ||
9086 | /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate | |
9087 | DWARF debugging symbols starting with ``..''. */ | |
9088 | if (name[0] == '.' && name[1] == '.') | |
9089 | return true; | |
9090 | ||
9091 | /* gcc will sometimes generate symbols beginning with ``_.L_'' when | |
9092 | emitting DWARF debugging output. I suspect this is actually a | |
9093 | small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call | |
9094 | ASM_GENERATE_INTERNAL_LABEL, and this causes the leading | |
9095 | underscore to be emitted on some ELF targets). For ease of use, | |
9096 | we treat such symbols as local. */ | |
9097 | if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_') | |
9098 | return true; | |
9099 | ||
9100 | /* Treat assembler generated fake symbols, dollar local labels and | |
9101 | forward-backward labels (aka local labels) as locals. | |
9102 | These labels have the form: | |
9103 | ||
9104 | L0^A.* (fake symbols) | |
9105 | ||
9106 | [.]?L[0123456789]+{^A|^B}[0123456789]* (local labels) | |
9107 | ||
9108 | Versions which start with .L will have already been matched above, | |
9109 | so we only need to match the rest. */ | |
9110 | if (name[0] == 'L' && ISDIGIT (name[1])) | |
9111 | { | |
9112 | bool ret = false; | |
9113 | const char * p; | |
9114 | char c; | |
9115 | ||
9116 | for (p = name + 2; (c = *p); p++) | |
9117 | { | |
9118 | if (c == 1 || c == 2) | |
9119 | { | |
9120 | if (c == 1 && p == name + 2) | |
9121 | /* A fake symbol. */ | |
9122 | return true; | |
9123 | ||
9124 | /* FIXME: We are being paranoid here and treating symbols like | |
9125 | L0^Bfoo as if there were non-local, on the grounds that the | |
9126 | assembler will never generate them. But can any symbol | |
9127 | containing an ASCII value in the range 1-31 ever be anything | |
9128 | other than some kind of local ? */ | |
9129 | ret = true; | |
9130 | } | |
9131 | ||
9132 | if (! ISDIGIT (c)) | |
9133 | { | |
9134 | ret = false; | |
9135 | break; | |
9136 | } | |
9137 | } | |
9138 | return ret; | |
9139 | } | |
9140 | ||
9141 | return false; | |
9142 | } | |
9143 | ||
9144 | alent * | |
9145 | _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED, | |
9146 | asymbol *symbol ATTRIBUTE_UNUSED) | |
9147 | { | |
9148 | abort (); | |
9149 | return NULL; | |
9150 | } | |
9151 | ||
9152 | bool | |
9153 | _bfd_elf_set_arch_mach (bfd *abfd, | |
9154 | enum bfd_architecture arch, | |
9155 | unsigned long machine) | |
9156 | { | |
9157 | /* If this isn't the right architecture for this backend, and this | |
9158 | isn't the generic backend, fail. */ | |
9159 | if (arch != get_elf_backend_data (abfd)->arch | |
9160 | && arch != bfd_arch_unknown | |
9161 | && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) | |
9162 | return false; | |
9163 | ||
9164 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
9165 | } | |
9166 | ||
9167 | /* Find the nearest line to a particular section and offset, | |
9168 | for error reporting. */ | |
9169 | ||
9170 | bool | |
9171 | _bfd_elf_find_nearest_line (bfd *abfd, | |
9172 | asymbol **symbols, | |
9173 | asection *section, | |
9174 | bfd_vma offset, | |
9175 | const char **filename_ptr, | |
9176 | const char **functionname_ptr, | |
9177 | unsigned int *line_ptr, | |
9178 | unsigned int *discriminator_ptr) | |
9179 | { | |
9180 | bool found; | |
9181 | ||
9182 | if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, | |
9183 | filename_ptr, functionname_ptr, | |
9184 | line_ptr, discriminator_ptr, | |
9185 | dwarf_debug_sections, | |
9186 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
9187 | return true; | |
9188 | ||
9189 | if (_bfd_dwarf1_find_nearest_line (abfd, symbols, section, offset, | |
9190 | filename_ptr, functionname_ptr, line_ptr)) | |
9191 | { | |
9192 | if (!*functionname_ptr) | |
9193 | _bfd_elf_find_function (abfd, symbols, section, offset, | |
9194 | *filename_ptr ? NULL : filename_ptr, | |
9195 | functionname_ptr); | |
9196 | return true; | |
9197 | } | |
9198 | ||
9199 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
9200 | &found, filename_ptr, | |
9201 | functionname_ptr, line_ptr, | |
9202 | &elf_tdata (abfd)->line_info)) | |
9203 | return false; | |
9204 | if (found && (*functionname_ptr || *line_ptr)) | |
9205 | return true; | |
9206 | ||
9207 | if (symbols == NULL) | |
9208 | return false; | |
9209 | ||
9210 | if (! _bfd_elf_find_function (abfd, symbols, section, offset, | |
9211 | filename_ptr, functionname_ptr)) | |
9212 | return false; | |
9213 | ||
9214 | *line_ptr = 0; | |
9215 | return true; | |
9216 | } | |
9217 | ||
9218 | /* Find the line for a symbol. */ | |
9219 | ||
9220 | bool | |
9221 | _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol, | |
9222 | const char **filename_ptr, unsigned int *line_ptr) | |
9223 | { | |
9224 | return _bfd_dwarf2_find_nearest_line (abfd, symbols, symbol, NULL, 0, | |
9225 | filename_ptr, NULL, line_ptr, NULL, | |
9226 | dwarf_debug_sections, | |
9227 | &elf_tdata (abfd)->dwarf2_find_line_info); | |
9228 | } | |
9229 | ||
9230 | /* After a call to bfd_find_nearest_line, successive calls to | |
9231 | bfd_find_inliner_info can be used to get source information about | |
9232 | each level of function inlining that terminated at the address | |
9233 | passed to bfd_find_nearest_line. Currently this is only supported | |
9234 | for DWARF2 with appropriate DWARF3 extensions. */ | |
9235 | ||
9236 | bool | |
9237 | _bfd_elf_find_inliner_info (bfd *abfd, | |
9238 | const char **filename_ptr, | |
9239 | const char **functionname_ptr, | |
9240 | unsigned int *line_ptr) | |
9241 | { | |
9242 | bool found; | |
9243 | found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, | |
9244 | functionname_ptr, line_ptr, | |
9245 | & elf_tdata (abfd)->dwarf2_find_line_info); | |
9246 | return found; | |
9247 | } | |
9248 | ||
9249 | int | |
9250 | _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info) | |
9251 | { | |
9252 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
9253 | int ret = bed->s->sizeof_ehdr; | |
9254 | ||
9255 | if (!bfd_link_relocatable (info)) | |
9256 | { | |
9257 | bfd_size_type phdr_size = elf_program_header_size (abfd); | |
9258 | ||
9259 | if (phdr_size == (bfd_size_type) -1) | |
9260 | { | |
9261 | struct elf_segment_map *m; | |
9262 | ||
9263 | phdr_size = 0; | |
9264 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) | |
9265 | phdr_size += bed->s->sizeof_phdr; | |
9266 | ||
9267 | if (phdr_size == 0) | |
9268 | phdr_size = get_program_header_size (abfd, info); | |
9269 | } | |
9270 | ||
9271 | elf_program_header_size (abfd) = phdr_size; | |
9272 | ret += phdr_size; | |
9273 | } | |
9274 | ||
9275 | return ret; | |
9276 | } | |
9277 | ||
9278 | bool | |
9279 | _bfd_elf_set_section_contents (bfd *abfd, | |
9280 | sec_ptr section, | |
9281 | const void *location, | |
9282 | file_ptr offset, | |
9283 | bfd_size_type count) | |
9284 | { | |
9285 | Elf_Internal_Shdr *hdr; | |
9286 | file_ptr pos; | |
9287 | ||
9288 | if (! abfd->output_has_begun | |
9289 | && ! _bfd_elf_compute_section_file_positions (abfd, NULL)) | |
9290 | return false; | |
9291 | ||
9292 | if (!count) | |
9293 | return true; | |
9294 | ||
9295 | hdr = &elf_section_data (section)->this_hdr; | |
9296 | if (hdr->sh_offset == (file_ptr) -1) | |
9297 | { | |
9298 | unsigned char *contents; | |
9299 | ||
9300 | if (bfd_section_is_ctf (section)) | |
9301 | /* Nothing to do with this section: the contents are generated | |
9302 | later. */ | |
9303 | return true; | |
9304 | ||
9305 | if ((section->flags & SEC_ELF_COMPRESS) == 0) | |
9306 | { | |
9307 | _bfd_error_handler | |
9308 | (_("%pB:%pA: error: attempting to write into an unallocated compressed section"), | |
9309 | abfd, section); | |
9310 | bfd_set_error (bfd_error_invalid_operation); | |
9311 | return false; | |
9312 | } | |
9313 | ||
9314 | if ((offset + count) > hdr->sh_size) | |
9315 | { | |
9316 | _bfd_error_handler | |
9317 | (_("%pB:%pA: error: attempting to write over the end of the section"), | |
9318 | abfd, section); | |
9319 | ||
9320 | bfd_set_error (bfd_error_invalid_operation); | |
9321 | return false; | |
9322 | } | |
9323 | ||
9324 | contents = hdr->contents; | |
9325 | if (contents == NULL) | |
9326 | { | |
9327 | _bfd_error_handler | |
9328 | (_("%pB:%pA: error: attempting to write section into an empty buffer"), | |
9329 | abfd, section); | |
9330 | ||
9331 | bfd_set_error (bfd_error_invalid_operation); | |
9332 | return false; | |
9333 | } | |
9334 | ||
9335 | memcpy (contents + offset, location, count); | |
9336 | return true; | |
9337 | } | |
9338 | ||
9339 | pos = hdr->sh_offset + offset; | |
9340 | if (bfd_seek (abfd, pos, SEEK_SET) != 0 | |
9341 | || bfd_bwrite (location, count, abfd) != count) | |
9342 | return false; | |
9343 | ||
9344 | return true; | |
9345 | } | |
9346 | ||
9347 | bool | |
9348 | _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, | |
9349 | arelent *cache_ptr ATTRIBUTE_UNUSED, | |
9350 | Elf_Internal_Rela *dst ATTRIBUTE_UNUSED) | |
9351 | { | |
9352 | abort (); | |
9353 | return false; | |
9354 | } | |
9355 | ||
9356 | /* Try to convert a non-ELF reloc into an ELF one. */ | |
9357 | ||
9358 | bool | |
9359 | _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc) | |
9360 | { | |
9361 | /* Check whether we really have an ELF howto. */ | |
9362 | ||
9363 | if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec) | |
9364 | { | |
9365 | bfd_reloc_code_real_type code; | |
9366 | reloc_howto_type *howto; | |
9367 | ||
9368 | /* Alien reloc: Try to determine its type to replace it with an | |
9369 | equivalent ELF reloc. */ | |
9370 | ||
9371 | if (areloc->howto->pc_relative) | |
9372 | { | |
9373 | switch (areloc->howto->bitsize) | |
9374 | { | |
9375 | case 8: | |
9376 | code = BFD_RELOC_8_PCREL; | |
9377 | break; | |
9378 | case 12: | |
9379 | code = BFD_RELOC_12_PCREL; | |
9380 | break; | |
9381 | case 16: | |
9382 | code = BFD_RELOC_16_PCREL; | |
9383 | break; | |
9384 | case 24: | |
9385 | code = BFD_RELOC_24_PCREL; | |
9386 | break; | |
9387 | case 32: | |
9388 | code = BFD_RELOC_32_PCREL; | |
9389 | break; | |
9390 | case 64: | |
9391 | code = BFD_RELOC_64_PCREL; | |
9392 | break; | |
9393 | default: | |
9394 | goto fail; | |
9395 | } | |
9396 | ||
9397 | howto = bfd_reloc_type_lookup (abfd, code); | |
9398 | ||
9399 | if (howto && areloc->howto->pcrel_offset != howto->pcrel_offset) | |
9400 | { | |
9401 | if (howto->pcrel_offset) | |
9402 | areloc->addend += areloc->address; | |
9403 | else | |
9404 | areloc->addend -= areloc->address; /* addend is unsigned!! */ | |
9405 | } | |
9406 | } | |
9407 | else | |
9408 | { | |
9409 | switch (areloc->howto->bitsize) | |
9410 | { | |
9411 | case 8: | |
9412 | code = BFD_RELOC_8; | |
9413 | break; | |
9414 | case 14: | |
9415 | code = BFD_RELOC_14; | |
9416 | break; | |
9417 | case 16: | |
9418 | code = BFD_RELOC_16; | |
9419 | break; | |
9420 | case 26: | |
9421 | code = BFD_RELOC_26; | |
9422 | break; | |
9423 | case 32: | |
9424 | code = BFD_RELOC_32; | |
9425 | break; | |
9426 | case 64: | |
9427 | code = BFD_RELOC_64; | |
9428 | break; | |
9429 | default: | |
9430 | goto fail; | |
9431 | } | |
9432 | ||
9433 | howto = bfd_reloc_type_lookup (abfd, code); | |
9434 | } | |
9435 | ||
9436 | if (howto) | |
9437 | areloc->howto = howto; | |
9438 | else | |
9439 | goto fail; | |
9440 | } | |
9441 | ||
9442 | return true; | |
9443 | ||
9444 | fail: | |
9445 | /* xgettext:c-format */ | |
9446 | _bfd_error_handler (_("%pB: %s unsupported"), | |
9447 | abfd, areloc->howto->name); | |
9448 | bfd_set_error (bfd_error_sorry); | |
9449 | return false; | |
9450 | } | |
9451 | ||
9452 | bool | |
9453 | _bfd_elf_close_and_cleanup (bfd *abfd) | |
9454 | { | |
9455 | struct elf_obj_tdata *tdata = elf_tdata (abfd); | |
9456 | if (tdata != NULL | |
9457 | && (bfd_get_format (abfd) == bfd_object | |
9458 | || bfd_get_format (abfd) == bfd_core)) | |
9459 | { | |
9460 | if (elf_tdata (abfd)->o != NULL && elf_shstrtab (abfd) != NULL) | |
9461 | _bfd_elf_strtab_free (elf_shstrtab (abfd)); | |
9462 | _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info); | |
9463 | } | |
9464 | ||
9465 | return _bfd_generic_close_and_cleanup (abfd); | |
9466 | } | |
9467 | ||
9468 | /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY | |
9469 | in the relocation's offset. Thus we cannot allow any sort of sanity | |
9470 | range-checking to interfere. There is nothing else to do in processing | |
9471 | this reloc. */ | |
9472 | ||
9473 | bfd_reloc_status_type | |
9474 | _bfd_elf_rel_vtable_reloc_fn | |
9475 | (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED, | |
9476 | struct bfd_symbol *symbol ATTRIBUTE_UNUSED, | |
9477 | void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED, | |
9478 | bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED) | |
9479 | { | |
9480 | return bfd_reloc_ok; | |
9481 | } | |
9482 | \f | |
9483 | /* Elf core file support. Much of this only works on native | |
9484 | toolchains, since we rely on knowing the | |
9485 | machine-dependent procfs structure in order to pick | |
9486 | out details about the corefile. */ | |
9487 | ||
9488 | #ifdef HAVE_SYS_PROCFS_H | |
9489 | # include <sys/procfs.h> | |
9490 | #endif | |
9491 | ||
9492 | /* Return a PID that identifies a "thread" for threaded cores, or the | |
9493 | PID of the main process for non-threaded cores. */ | |
9494 | ||
9495 | static int | |
9496 | elfcore_make_pid (bfd *abfd) | |
9497 | { | |
9498 | int pid; | |
9499 | ||
9500 | pid = elf_tdata (abfd)->core->lwpid; | |
9501 | if (pid == 0) | |
9502 | pid = elf_tdata (abfd)->core->pid; | |
9503 | ||
9504 | return pid; | |
9505 | } | |
9506 | ||
9507 | /* If there isn't a section called NAME, make one, using | |
9508 | data from SECT. Note, this function will generate a | |
9509 | reference to NAME, so you shouldn't deallocate or | |
9510 | overwrite it. */ | |
9511 | ||
9512 | static bool | |
9513 | elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect) | |
9514 | { | |
9515 | asection *sect2; | |
9516 | ||
9517 | if (bfd_get_section_by_name (abfd, name) != NULL) | |
9518 | return true; | |
9519 | ||
9520 | sect2 = bfd_make_section_with_flags (abfd, name, sect->flags); | |
9521 | if (sect2 == NULL) | |
9522 | return false; | |
9523 | ||
9524 | sect2->size = sect->size; | |
9525 | sect2->filepos = sect->filepos; | |
9526 | sect2->alignment_power = sect->alignment_power; | |
9527 | return true; | |
9528 | } | |
9529 | ||
9530 | /* Create a pseudosection containing SIZE bytes at FILEPOS. This | |
9531 | actually creates up to two pseudosections: | |
9532 | - For the single-threaded case, a section named NAME, unless | |
9533 | such a section already exists. | |
9534 | - For the multi-threaded case, a section named "NAME/PID", where | |
9535 | PID is elfcore_make_pid (abfd). | |
9536 | Both pseudosections have identical contents. */ | |
9537 | bool | |
9538 | _bfd_elfcore_make_pseudosection (bfd *abfd, | |
9539 | char *name, | |
9540 | size_t size, | |
9541 | ufile_ptr filepos) | |
9542 | { | |
9543 | char buf[100]; | |
9544 | char *threaded_name; | |
9545 | size_t len; | |
9546 | asection *sect; | |
9547 | ||
9548 | /* Build the section name. */ | |
9549 | ||
9550 | sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd)); | |
9551 | len = strlen (buf) + 1; | |
9552 | threaded_name = (char *) bfd_alloc (abfd, len); | |
9553 | if (threaded_name == NULL) | |
9554 | return false; | |
9555 | memcpy (threaded_name, buf, len); | |
9556 | ||
9557 | sect = bfd_make_section_anyway_with_flags (abfd, threaded_name, | |
9558 | SEC_HAS_CONTENTS); | |
9559 | if (sect == NULL) | |
9560 | return false; | |
9561 | sect->size = size; | |
9562 | sect->filepos = filepos; | |
9563 | sect->alignment_power = 2; | |
9564 | ||
9565 | return elfcore_maybe_make_sect (abfd, name, sect); | |
9566 | } | |
9567 | ||
9568 | static bool | |
9569 | elfcore_make_auxv_note_section (bfd *abfd, Elf_Internal_Note *note, | |
9570 | size_t offs) | |
9571 | { | |
9572 | asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv", | |
9573 | SEC_HAS_CONTENTS); | |
9574 | ||
9575 | if (sect == NULL) | |
9576 | return false; | |
9577 | ||
9578 | sect->size = note->descsz - offs; | |
9579 | sect->filepos = note->descpos + offs; | |
9580 | sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32; | |
9581 | ||
9582 | return true; | |
9583 | } | |
9584 | ||
9585 | /* prstatus_t exists on: | |
9586 | solaris 2.5+ | |
9587 | linux 2.[01] + glibc | |
9588 | unixware 4.2 | |
9589 | */ | |
9590 | ||
9591 | #if defined (HAVE_PRSTATUS_T) | |
9592 | ||
9593 | static bool | |
9594 | elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
9595 | { | |
9596 | size_t size; | |
9597 | int offset; | |
9598 | ||
9599 | if (note->descsz == sizeof (prstatus_t)) | |
9600 | { | |
9601 | prstatus_t prstat; | |
9602 | ||
9603 | size = sizeof (prstat.pr_reg); | |
9604 | offset = offsetof (prstatus_t, pr_reg); | |
9605 | memcpy (&prstat, note->descdata, sizeof (prstat)); | |
9606 | ||
9607 | /* Do not overwrite the core signal if it | |
9608 | has already been set by another thread. */ | |
9609 | if (elf_tdata (abfd)->core->signal == 0) | |
9610 | elf_tdata (abfd)->core->signal = prstat.pr_cursig; | |
9611 | if (elf_tdata (abfd)->core->pid == 0) | |
9612 | elf_tdata (abfd)->core->pid = prstat.pr_pid; | |
9613 | ||
9614 | /* pr_who exists on: | |
9615 | solaris 2.5+ | |
9616 | unixware 4.2 | |
9617 | pr_who doesn't exist on: | |
9618 | linux 2.[01] | |
9619 | */ | |
9620 | #if defined (HAVE_PRSTATUS_T_PR_WHO) | |
9621 | elf_tdata (abfd)->core->lwpid = prstat.pr_who; | |
9622 | #else | |
9623 | elf_tdata (abfd)->core->lwpid = prstat.pr_pid; | |
9624 | #endif | |
9625 | } | |
9626 | #if defined (HAVE_PRSTATUS32_T) | |
9627 | else if (note->descsz == sizeof (prstatus32_t)) | |
9628 | { | |
9629 | /* 64-bit host, 32-bit corefile */ | |
9630 | prstatus32_t prstat; | |
9631 | ||
9632 | size = sizeof (prstat.pr_reg); | |
9633 | offset = offsetof (prstatus32_t, pr_reg); | |
9634 | memcpy (&prstat, note->descdata, sizeof (prstat)); | |
9635 | ||
9636 | /* Do not overwrite the core signal if it | |
9637 | has already been set by another thread. */ | |
9638 | if (elf_tdata (abfd)->core->signal == 0) | |
9639 | elf_tdata (abfd)->core->signal = prstat.pr_cursig; | |
9640 | if (elf_tdata (abfd)->core->pid == 0) | |
9641 | elf_tdata (abfd)->core->pid = prstat.pr_pid; | |
9642 | ||
9643 | /* pr_who exists on: | |
9644 | solaris 2.5+ | |
9645 | unixware 4.2 | |
9646 | pr_who doesn't exist on: | |
9647 | linux 2.[01] | |
9648 | */ | |
9649 | #if defined (HAVE_PRSTATUS32_T_PR_WHO) | |
9650 | elf_tdata (abfd)->core->lwpid = prstat.pr_who; | |
9651 | #else | |
9652 | elf_tdata (abfd)->core->lwpid = prstat.pr_pid; | |
9653 | #endif | |
9654 | } | |
9655 | #endif /* HAVE_PRSTATUS32_T */ | |
9656 | else | |
9657 | { | |
9658 | /* Fail - we don't know how to handle any other | |
9659 | note size (ie. data object type). */ | |
9660 | return true; | |
9661 | } | |
9662 | ||
9663 | /* Make a ".reg/999" section and a ".reg" section. */ | |
9664 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
9665 | size, note->descpos + offset); | |
9666 | } | |
9667 | #endif /* defined (HAVE_PRSTATUS_T) */ | |
9668 | ||
9669 | /* Create a pseudosection containing the exact contents of NOTE. */ | |
9670 | static bool | |
9671 | elfcore_make_note_pseudosection (bfd *abfd, | |
9672 | char *name, | |
9673 | Elf_Internal_Note *note) | |
9674 | { | |
9675 | return _bfd_elfcore_make_pseudosection (abfd, name, | |
9676 | note->descsz, note->descpos); | |
9677 | } | |
9678 | ||
9679 | /* There isn't a consistent prfpregset_t across platforms, | |
9680 | but it doesn't matter, because we don't have to pick this | |
9681 | data structure apart. */ | |
9682 | ||
9683 | static bool | |
9684 | elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note) | |
9685 | { | |
9686 | return elfcore_make_note_pseudosection (abfd, ".reg2", note); | |
9687 | } | |
9688 | ||
9689 | /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note | |
9690 | type of NT_PRXFPREG. Just include the whole note's contents | |
9691 | literally. */ | |
9692 | ||
9693 | static bool | |
9694 | elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note) | |
9695 | { | |
9696 | return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note); | |
9697 | } | |
9698 | ||
9699 | /* Linux dumps the Intel XSAVE extended state in a note named "LINUX" | |
9700 | with a note type of NT_X86_XSTATE. Just include the whole note's | |
9701 | contents literally. */ | |
9702 | ||
9703 | static bool | |
9704 | elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note) | |
9705 | { | |
9706 | return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note); | |
9707 | } | |
9708 | ||
9709 | static bool | |
9710 | elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note) | |
9711 | { | |
9712 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note); | |
9713 | } | |
9714 | ||
9715 | static bool | |
9716 | elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note) | |
9717 | { | |
9718 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note); | |
9719 | } | |
9720 | ||
9721 | static bool | |
9722 | elfcore_grok_ppc_tar (bfd *abfd, Elf_Internal_Note *note) | |
9723 | { | |
9724 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tar", note); | |
9725 | } | |
9726 | ||
9727 | static bool | |
9728 | elfcore_grok_ppc_ppr (bfd *abfd, Elf_Internal_Note *note) | |
9729 | { | |
9730 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-ppr", note); | |
9731 | } | |
9732 | ||
9733 | static bool | |
9734 | elfcore_grok_ppc_dscr (bfd *abfd, Elf_Internal_Note *note) | |
9735 | { | |
9736 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-dscr", note); | |
9737 | } | |
9738 | ||
9739 | static bool | |
9740 | elfcore_grok_ppc_ebb (bfd *abfd, Elf_Internal_Note *note) | |
9741 | { | |
9742 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-ebb", note); | |
9743 | } | |
9744 | ||
9745 | static bool | |
9746 | elfcore_grok_ppc_pmu (bfd *abfd, Elf_Internal_Note *note) | |
9747 | { | |
9748 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-pmu", note); | |
9749 | } | |
9750 | ||
9751 | static bool | |
9752 | elfcore_grok_ppc_tm_cgpr (bfd *abfd, Elf_Internal_Note *note) | |
9753 | { | |
9754 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tm-cgpr", note); | |
9755 | } | |
9756 | ||
9757 | static bool | |
9758 | elfcore_grok_ppc_tm_cfpr (bfd *abfd, Elf_Internal_Note *note) | |
9759 | { | |
9760 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tm-cfpr", note); | |
9761 | } | |
9762 | ||
9763 | static bool | |
9764 | elfcore_grok_ppc_tm_cvmx (bfd *abfd, Elf_Internal_Note *note) | |
9765 | { | |
9766 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tm-cvmx", note); | |
9767 | } | |
9768 | ||
9769 | static bool | |
9770 | elfcore_grok_ppc_tm_cvsx (bfd *abfd, Elf_Internal_Note *note) | |
9771 | { | |
9772 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tm-cvsx", note); | |
9773 | } | |
9774 | ||
9775 | static bool | |
9776 | elfcore_grok_ppc_tm_spr (bfd *abfd, Elf_Internal_Note *note) | |
9777 | { | |
9778 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tm-spr", note); | |
9779 | } | |
9780 | ||
9781 | static bool | |
9782 | elfcore_grok_ppc_tm_ctar (bfd *abfd, Elf_Internal_Note *note) | |
9783 | { | |
9784 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tm-ctar", note); | |
9785 | } | |
9786 | ||
9787 | static bool | |
9788 | elfcore_grok_ppc_tm_cppr (bfd *abfd, Elf_Internal_Note *note) | |
9789 | { | |
9790 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tm-cppr", note); | |
9791 | } | |
9792 | ||
9793 | static bool | |
9794 | elfcore_grok_ppc_tm_cdscr (bfd *abfd, Elf_Internal_Note *note) | |
9795 | { | |
9796 | return elfcore_make_note_pseudosection (abfd, ".reg-ppc-tm-cdscr", note); | |
9797 | } | |
9798 | ||
9799 | static bool | |
9800 | elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note) | |
9801 | { | |
9802 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note); | |
9803 | } | |
9804 | ||
9805 | static bool | |
9806 | elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note) | |
9807 | { | |
9808 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note); | |
9809 | } | |
9810 | ||
9811 | static bool | |
9812 | elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note) | |
9813 | { | |
9814 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note); | |
9815 | } | |
9816 | ||
9817 | static bool | |
9818 | elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note) | |
9819 | { | |
9820 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note); | |
9821 | } | |
9822 | ||
9823 | static bool | |
9824 | elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note) | |
9825 | { | |
9826 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note); | |
9827 | } | |
9828 | ||
9829 | static bool | |
9830 | elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note) | |
9831 | { | |
9832 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note); | |
9833 | } | |
9834 | ||
9835 | static bool | |
9836 | elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note) | |
9837 | { | |
9838 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note); | |
9839 | } | |
9840 | ||
9841 | static bool | |
9842 | elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note) | |
9843 | { | |
9844 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note); | |
9845 | } | |
9846 | ||
9847 | static bool | |
9848 | elfcore_grok_s390_tdb (bfd *abfd, Elf_Internal_Note *note) | |
9849 | { | |
9850 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-tdb", note); | |
9851 | } | |
9852 | ||
9853 | static bool | |
9854 | elfcore_grok_s390_vxrs_low (bfd *abfd, Elf_Internal_Note *note) | |
9855 | { | |
9856 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-low", note); | |
9857 | } | |
9858 | ||
9859 | static bool | |
9860 | elfcore_grok_s390_vxrs_high (bfd *abfd, Elf_Internal_Note *note) | |
9861 | { | |
9862 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-vxrs-high", note); | |
9863 | } | |
9864 | ||
9865 | static bool | |
9866 | elfcore_grok_s390_gs_cb (bfd *abfd, Elf_Internal_Note *note) | |
9867 | { | |
9868 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-cb", note); | |
9869 | } | |
9870 | ||
9871 | static bool | |
9872 | elfcore_grok_s390_gs_bc (bfd *abfd, Elf_Internal_Note *note) | |
9873 | { | |
9874 | return elfcore_make_note_pseudosection (abfd, ".reg-s390-gs-bc", note); | |
9875 | } | |
9876 | ||
9877 | static bool | |
9878 | elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note) | |
9879 | { | |
9880 | return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note); | |
9881 | } | |
9882 | ||
9883 | static bool | |
9884 | elfcore_grok_aarch_tls (bfd *abfd, Elf_Internal_Note *note) | |
9885 | { | |
9886 | return elfcore_make_note_pseudosection (abfd, ".reg-aarch-tls", note); | |
9887 | } | |
9888 | ||
9889 | static bool | |
9890 | elfcore_grok_aarch_hw_break (bfd *abfd, Elf_Internal_Note *note) | |
9891 | { | |
9892 | return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-break", note); | |
9893 | } | |
9894 | ||
9895 | static bool | |
9896 | elfcore_grok_aarch_hw_watch (bfd *abfd, Elf_Internal_Note *note) | |
9897 | { | |
9898 | return elfcore_make_note_pseudosection (abfd, ".reg-aarch-hw-watch", note); | |
9899 | } | |
9900 | ||
9901 | static bool | |
9902 | elfcore_grok_aarch_sve (bfd *abfd, Elf_Internal_Note *note) | |
9903 | { | |
9904 | return elfcore_make_note_pseudosection (abfd, ".reg-aarch-sve", note); | |
9905 | } | |
9906 | ||
9907 | static bool | |
9908 | elfcore_grok_aarch_pauth (bfd *abfd, Elf_Internal_Note *note) | |
9909 | { | |
9910 | return elfcore_make_note_pseudosection (abfd, ".reg-aarch-pauth", note); | |
9911 | } | |
9912 | ||
9913 | static bool | |
9914 | elfcore_grok_aarch_mte (bfd *abfd, Elf_Internal_Note *note) | |
9915 | { | |
9916 | return elfcore_make_note_pseudosection (abfd, ".reg-aarch-mte", | |
9917 | note); | |
9918 | } | |
9919 | ||
9920 | static bool | |
9921 | elfcore_grok_arc_v2 (bfd *abfd, Elf_Internal_Note *note) | |
9922 | { | |
9923 | return elfcore_make_note_pseudosection (abfd, ".reg-arc-v2", note); | |
9924 | } | |
9925 | ||
9926 | /* Convert NOTE into a bfd_section called ".reg-riscv-csr". Return TRUE if | |
9927 | successful otherwise, return FALSE. */ | |
9928 | ||
9929 | static bool | |
9930 | elfcore_grok_riscv_csr (bfd *abfd, Elf_Internal_Note *note) | |
9931 | { | |
9932 | return elfcore_make_note_pseudosection (abfd, ".reg-riscv-csr", note); | |
9933 | } | |
9934 | ||
9935 | /* Convert NOTE into a bfd_section called ".gdb-tdesc". Return TRUE if | |
9936 | successful otherwise, return FALSE. */ | |
9937 | ||
9938 | static bool | |
9939 | elfcore_grok_gdb_tdesc (bfd *abfd, Elf_Internal_Note *note) | |
9940 | { | |
9941 | return elfcore_make_note_pseudosection (abfd, ".gdb-tdesc", note); | |
9942 | } | |
9943 | ||
9944 | static bool | |
9945 | elfcore_grok_loongarch_cpucfg (bfd *abfd, Elf_Internal_Note *note) | |
9946 | { | |
9947 | return elfcore_make_note_pseudosection (abfd, ".reg-loongarch-cpucfg", note); | |
9948 | } | |
9949 | ||
9950 | static bool | |
9951 | elfcore_grok_loongarch_lbt (bfd *abfd, Elf_Internal_Note *note) | |
9952 | { | |
9953 | return elfcore_make_note_pseudosection (abfd, ".reg-loongarch-lbt", note); | |
9954 | } | |
9955 | ||
9956 | static bool | |
9957 | elfcore_grok_loongarch_lsx (bfd *abfd, Elf_Internal_Note *note) | |
9958 | { | |
9959 | return elfcore_make_note_pseudosection (abfd, ".reg-loongarch-lsx", note); | |
9960 | } | |
9961 | ||
9962 | static bool | |
9963 | elfcore_grok_loongarch_lasx (bfd *abfd, Elf_Internal_Note *note) | |
9964 | { | |
9965 | return elfcore_make_note_pseudosection (abfd, ".reg-loongarch-lasx", note); | |
9966 | } | |
9967 | ||
9968 | #if defined (HAVE_PRPSINFO_T) | |
9969 | typedef prpsinfo_t elfcore_psinfo_t; | |
9970 | #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */ | |
9971 | typedef prpsinfo32_t elfcore_psinfo32_t; | |
9972 | #endif | |
9973 | #endif | |
9974 | ||
9975 | #if defined (HAVE_PSINFO_T) | |
9976 | typedef psinfo_t elfcore_psinfo_t; | |
9977 | #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */ | |
9978 | typedef psinfo32_t elfcore_psinfo32_t; | |
9979 | #endif | |
9980 | #endif | |
9981 | ||
9982 | /* return a malloc'ed copy of a string at START which is at | |
9983 | most MAX bytes long, possibly without a terminating '\0'. | |
9984 | the copy will always have a terminating '\0'. */ | |
9985 | ||
9986 | char * | |
9987 | _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max) | |
9988 | { | |
9989 | char *dups; | |
9990 | char *end = (char *) memchr (start, '\0', max); | |
9991 | size_t len; | |
9992 | ||
9993 | if (end == NULL) | |
9994 | len = max; | |
9995 | else | |
9996 | len = end - start; | |
9997 | ||
9998 | dups = (char *) bfd_alloc (abfd, len + 1); | |
9999 | if (dups == NULL) | |
10000 | return NULL; | |
10001 | ||
10002 | memcpy (dups, start, len); | |
10003 | dups[len] = '\0'; | |
10004 | ||
10005 | return dups; | |
10006 | } | |
10007 | ||
10008 | #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) | |
10009 | static bool | |
10010 | elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) | |
10011 | { | |
10012 | if (note->descsz == sizeof (elfcore_psinfo_t)) | |
10013 | { | |
10014 | elfcore_psinfo_t psinfo; | |
10015 | ||
10016 | memcpy (&psinfo, note->descdata, sizeof (psinfo)); | |
10017 | ||
10018 | #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID) | |
10019 | elf_tdata (abfd)->core->pid = psinfo.pr_pid; | |
10020 | #endif | |
10021 | elf_tdata (abfd)->core->program | |
10022 | = _bfd_elfcore_strndup (abfd, psinfo.pr_fname, | |
10023 | sizeof (psinfo.pr_fname)); | |
10024 | ||
10025 | elf_tdata (abfd)->core->command | |
10026 | = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs, | |
10027 | sizeof (psinfo.pr_psargs)); | |
10028 | } | |
10029 | #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T) | |
10030 | else if (note->descsz == sizeof (elfcore_psinfo32_t)) | |
10031 | { | |
10032 | /* 64-bit host, 32-bit corefile */ | |
10033 | elfcore_psinfo32_t psinfo; | |
10034 | ||
10035 | memcpy (&psinfo, note->descdata, sizeof (psinfo)); | |
10036 | ||
10037 | #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID) | |
10038 | elf_tdata (abfd)->core->pid = psinfo.pr_pid; | |
10039 | #endif | |
10040 | elf_tdata (abfd)->core->program | |
10041 | = _bfd_elfcore_strndup (abfd, psinfo.pr_fname, | |
10042 | sizeof (psinfo.pr_fname)); | |
10043 | ||
10044 | elf_tdata (abfd)->core->command | |
10045 | = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs, | |
10046 | sizeof (psinfo.pr_psargs)); | |
10047 | } | |
10048 | #endif | |
10049 | ||
10050 | else | |
10051 | { | |
10052 | /* Fail - we don't know how to handle any other | |
10053 | note size (ie. data object type). */ | |
10054 | return true; | |
10055 | } | |
10056 | ||
10057 | /* Note that for some reason, a spurious space is tacked | |
10058 | onto the end of the args in some (at least one anyway) | |
10059 | implementations, so strip it off if it exists. */ | |
10060 | ||
10061 | { | |
10062 | char *command = elf_tdata (abfd)->core->command; | |
10063 | int n = strlen (command); | |
10064 | ||
10065 | if (0 < n && command[n - 1] == ' ') | |
10066 | command[n - 1] = '\0'; | |
10067 | } | |
10068 | ||
10069 | return true; | |
10070 | } | |
10071 | #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */ | |
10072 | ||
10073 | #if defined (HAVE_PSTATUS_T) | |
10074 | static bool | |
10075 | elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note) | |
10076 | { | |
10077 | if (note->descsz == sizeof (pstatus_t) | |
10078 | #if defined (HAVE_PXSTATUS_T) | |
10079 | || note->descsz == sizeof (pxstatus_t) | |
10080 | #endif | |
10081 | ) | |
10082 | { | |
10083 | pstatus_t pstat; | |
10084 | ||
10085 | memcpy (&pstat, note->descdata, sizeof (pstat)); | |
10086 | ||
10087 | elf_tdata (abfd)->core->pid = pstat.pr_pid; | |
10088 | } | |
10089 | #if defined (HAVE_PSTATUS32_T) | |
10090 | else if (note->descsz == sizeof (pstatus32_t)) | |
10091 | { | |
10092 | /* 64-bit host, 32-bit corefile */ | |
10093 | pstatus32_t pstat; | |
10094 | ||
10095 | memcpy (&pstat, note->descdata, sizeof (pstat)); | |
10096 | ||
10097 | elf_tdata (abfd)->core->pid = pstat.pr_pid; | |
10098 | } | |
10099 | #endif | |
10100 | /* Could grab some more details from the "representative" | |
10101 | lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an | |
10102 | NT_LWPSTATUS note, presumably. */ | |
10103 | ||
10104 | return true; | |
10105 | } | |
10106 | #endif /* defined (HAVE_PSTATUS_T) */ | |
10107 | ||
10108 | #if defined (HAVE_LWPSTATUS_T) | |
10109 | static bool | |
10110 | elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note) | |
10111 | { | |
10112 | lwpstatus_t lwpstat; | |
10113 | char buf[100]; | |
10114 | char *name; | |
10115 | size_t len; | |
10116 | asection *sect; | |
10117 | ||
10118 | if (note->descsz != sizeof (lwpstat) | |
10119 | #if defined (HAVE_LWPXSTATUS_T) | |
10120 | && note->descsz != sizeof (lwpxstatus_t) | |
10121 | #endif | |
10122 | ) | |
10123 | return true; | |
10124 | ||
10125 | memcpy (&lwpstat, note->descdata, sizeof (lwpstat)); | |
10126 | ||
10127 | elf_tdata (abfd)->core->lwpid = lwpstat.pr_lwpid; | |
10128 | /* Do not overwrite the core signal if it has already been set by | |
10129 | another thread. */ | |
10130 | if (elf_tdata (abfd)->core->signal == 0) | |
10131 | elf_tdata (abfd)->core->signal = lwpstat.pr_cursig; | |
10132 | ||
10133 | /* Make a ".reg/999" section. */ | |
10134 | ||
10135 | sprintf (buf, ".reg/%d", elfcore_make_pid (abfd)); | |
10136 | len = strlen (buf) + 1; | |
10137 | name = bfd_alloc (abfd, len); | |
10138 | if (name == NULL) | |
10139 | return false; | |
10140 | memcpy (name, buf, len); | |
10141 | ||
10142 | sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS); | |
10143 | if (sect == NULL) | |
10144 | return false; | |
10145 | ||
10146 | #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT) | |
10147 | sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs); | |
10148 | sect->filepos = note->descpos | |
10149 | + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs); | |
10150 | #endif | |
10151 | ||
10152 | #if defined (HAVE_LWPSTATUS_T_PR_REG) | |
10153 | sect->size = sizeof (lwpstat.pr_reg); | |
10154 | sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg); | |
10155 | #endif | |
10156 | ||
10157 | sect->alignment_power = 2; | |
10158 | ||
10159 | if (!elfcore_maybe_make_sect (abfd, ".reg", sect)) | |
10160 | return false; | |
10161 | ||
10162 | /* Make a ".reg2/999" section */ | |
10163 | ||
10164 | sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd)); | |
10165 | len = strlen (buf) + 1; | |
10166 | name = bfd_alloc (abfd, len); | |
10167 | if (name == NULL) | |
10168 | return false; | |
10169 | memcpy (name, buf, len); | |
10170 | ||
10171 | sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS); | |
10172 | if (sect == NULL) | |
10173 | return false; | |
10174 | ||
10175 | #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT) | |
10176 | sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs); | |
10177 | sect->filepos = note->descpos | |
10178 | + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs); | |
10179 | #endif | |
10180 | ||
10181 | #if defined (HAVE_LWPSTATUS_T_PR_FPREG) | |
10182 | sect->size = sizeof (lwpstat.pr_fpreg); | |
10183 | sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg); | |
10184 | #endif | |
10185 | ||
10186 | sect->alignment_power = 2; | |
10187 | ||
10188 | return elfcore_maybe_make_sect (abfd, ".reg2", sect); | |
10189 | } | |
10190 | #endif /* defined (HAVE_LWPSTATUS_T) */ | |
10191 | ||
10192 | /* These constants, and the structure offsets used below, are defined by | |
10193 | Cygwin's core_dump.h */ | |
10194 | #define NOTE_INFO_PROCESS 1 | |
10195 | #define NOTE_INFO_THREAD 2 | |
10196 | #define NOTE_INFO_MODULE 3 | |
10197 | #define NOTE_INFO_MODULE64 4 | |
10198 | ||
10199 | static bool | |
10200 | elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note) | |
10201 | { | |
10202 | char buf[30]; | |
10203 | char *name; | |
10204 | size_t len; | |
10205 | unsigned int name_size; | |
10206 | asection *sect; | |
10207 | unsigned int type; | |
10208 | int is_active_thread; | |
10209 | bfd_vma base_addr; | |
10210 | ||
10211 | if (note->descsz < 4) | |
10212 | return true; | |
10213 | ||
10214 | if (! startswith (note->namedata, "win32")) | |
10215 | return true; | |
10216 | ||
10217 | type = bfd_get_32 (abfd, note->descdata); | |
10218 | ||
10219 | struct | |
10220 | { | |
10221 | const char *type_name; | |
10222 | unsigned long min_size; | |
10223 | } size_check[] = | |
10224 | { | |
10225 | { "NOTE_INFO_PROCESS", 12 }, | |
10226 | { "NOTE_INFO_THREAD", 12 }, | |
10227 | { "NOTE_INFO_MODULE", 12 }, | |
10228 | { "NOTE_INFO_MODULE64", 16 }, | |
10229 | }; | |
10230 | ||
10231 | if (type == 0 || type > (sizeof(size_check)/sizeof(size_check[0]))) | |
10232 | return true; | |
10233 | ||
10234 | if (note->descsz < size_check[type - 1].min_size) | |
10235 | { | |
10236 | _bfd_error_handler (_("%pB: warning: win32pstatus %s of size %lu bytes is too small"), | |
10237 | abfd, size_check[type - 1].type_name, note->descsz); | |
10238 | return true; | |
10239 | } | |
10240 | ||
10241 | switch (type) | |
10242 | { | |
10243 | case NOTE_INFO_PROCESS: | |
10244 | /* FIXME: need to add ->core->command. */ | |
10245 | elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 4); | |
10246 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 8); | |
10247 | break; | |
10248 | ||
10249 | case NOTE_INFO_THREAD: | |
10250 | /* Make a ".reg/<tid>" section containing the Win32 API thread CONTEXT | |
10251 | structure. */ | |
10252 | /* thread_info.tid */ | |
10253 | sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 4)); | |
10254 | ||
10255 | len = strlen (buf) + 1; | |
10256 | name = (char *) bfd_alloc (abfd, len); | |
10257 | if (name == NULL) | |
10258 | return false; | |
10259 | ||
10260 | memcpy (name, buf, len); | |
10261 | ||
10262 | sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS); | |
10263 | if (sect == NULL) | |
10264 | return false; | |
10265 | ||
10266 | /* sizeof (thread_info.thread_context) */ | |
10267 | sect->size = note->descsz - 12; | |
10268 | /* offsetof (thread_info.thread_context) */ | |
10269 | sect->filepos = note->descpos + 12; | |
10270 | sect->alignment_power = 2; | |
10271 | ||
10272 | /* thread_info.is_active_thread */ | |
10273 | is_active_thread = bfd_get_32 (abfd, note->descdata + 8); | |
10274 | ||
10275 | if (is_active_thread) | |
10276 | if (! elfcore_maybe_make_sect (abfd, ".reg", sect)) | |
10277 | return false; | |
10278 | break; | |
10279 | ||
10280 | case NOTE_INFO_MODULE: | |
10281 | case NOTE_INFO_MODULE64: | |
10282 | /* Make a ".module/xxxxxxxx" section. */ | |
10283 | if (type == NOTE_INFO_MODULE) | |
10284 | { | |
10285 | /* module_info.base_address */ | |
10286 | base_addr = bfd_get_32 (abfd, note->descdata + 4); | |
10287 | sprintf (buf, ".module/%08lx", (unsigned long) base_addr); | |
10288 | /* module_info.module_name_size */ | |
10289 | name_size = bfd_get_32 (abfd, note->descdata + 8); | |
10290 | } | |
10291 | else /* NOTE_INFO_MODULE64 */ | |
10292 | { | |
10293 | /* module_info.base_address */ | |
10294 | base_addr = bfd_get_64 (abfd, note->descdata + 4); | |
10295 | sprintf (buf, ".module/%016lx", (unsigned long) base_addr); | |
10296 | /* module_info.module_name_size */ | |
10297 | name_size = bfd_get_32 (abfd, note->descdata + 12); | |
10298 | } | |
10299 | ||
10300 | len = strlen (buf) + 1; | |
10301 | name = (char *) bfd_alloc (abfd, len); | |
10302 | if (name == NULL) | |
10303 | return false; | |
10304 | ||
10305 | memcpy (name, buf, len); | |
10306 | ||
10307 | sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS); | |
10308 | ||
10309 | if (sect == NULL) | |
10310 | return false; | |
10311 | ||
10312 | if (note->descsz < 12 + name_size) | |
10313 | { | |
10314 | _bfd_error_handler (_("%pB: win32pstatus NOTE_INFO_MODULE of size %lu is too small to contain a name of size %u"), | |
10315 | abfd, note->descsz, name_size); | |
10316 | return true; | |
10317 | } | |
10318 | ||
10319 | sect->size = note->descsz; | |
10320 | sect->filepos = note->descpos; | |
10321 | sect->alignment_power = 2; | |
10322 | break; | |
10323 | ||
10324 | default: | |
10325 | return true; | |
10326 | } | |
10327 | ||
10328 | return true; | |
10329 | } | |
10330 | ||
10331 | static bool | |
10332 | elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note) | |
10333 | { | |
10334 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
10335 | ||
10336 | switch (note->type) | |
10337 | { | |
10338 | default: | |
10339 | return true; | |
10340 | ||
10341 | case NT_PRSTATUS: | |
10342 | if (bed->elf_backend_grok_prstatus) | |
10343 | if ((*bed->elf_backend_grok_prstatus) (abfd, note)) | |
10344 | return true; | |
10345 | #if defined (HAVE_PRSTATUS_T) | |
10346 | return elfcore_grok_prstatus (abfd, note); | |
10347 | #else | |
10348 | return true; | |
10349 | #endif | |
10350 | ||
10351 | #if defined (HAVE_PSTATUS_T) | |
10352 | case NT_PSTATUS: | |
10353 | return elfcore_grok_pstatus (abfd, note); | |
10354 | #endif | |
10355 | ||
10356 | #if defined (HAVE_LWPSTATUS_T) | |
10357 | case NT_LWPSTATUS: | |
10358 | return elfcore_grok_lwpstatus (abfd, note); | |
10359 | #endif | |
10360 | ||
10361 | case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */ | |
10362 | return elfcore_grok_prfpreg (abfd, note); | |
10363 | ||
10364 | case NT_WIN32PSTATUS: | |
10365 | return elfcore_grok_win32pstatus (abfd, note); | |
10366 | ||
10367 | case NT_PRXFPREG: /* Linux SSE extension */ | |
10368 | if (note->namesz == 6 | |
10369 | && strcmp (note->namedata, "LINUX") == 0) | |
10370 | return elfcore_grok_prxfpreg (abfd, note); | |
10371 | else | |
10372 | return true; | |
10373 | ||
10374 | case NT_X86_XSTATE: /* Linux XSAVE extension */ | |
10375 | if (note->namesz == 6 | |
10376 | && strcmp (note->namedata, "LINUX") == 0) | |
10377 | return elfcore_grok_xstatereg (abfd, note); | |
10378 | else | |
10379 | return true; | |
10380 | ||
10381 | case NT_PPC_VMX: | |
10382 | if (note->namesz == 6 | |
10383 | && strcmp (note->namedata, "LINUX") == 0) | |
10384 | return elfcore_grok_ppc_vmx (abfd, note); | |
10385 | else | |
10386 | return true; | |
10387 | ||
10388 | case NT_PPC_VSX: | |
10389 | if (note->namesz == 6 | |
10390 | && strcmp (note->namedata, "LINUX") == 0) | |
10391 | return elfcore_grok_ppc_vsx (abfd, note); | |
10392 | else | |
10393 | return true; | |
10394 | ||
10395 | case NT_PPC_TAR: | |
10396 | if (note->namesz == 6 | |
10397 | && strcmp (note->namedata, "LINUX") == 0) | |
10398 | return elfcore_grok_ppc_tar (abfd, note); | |
10399 | else | |
10400 | return true; | |
10401 | ||
10402 | case NT_PPC_PPR: | |
10403 | if (note->namesz == 6 | |
10404 | && strcmp (note->namedata, "LINUX") == 0) | |
10405 | return elfcore_grok_ppc_ppr (abfd, note); | |
10406 | else | |
10407 | return true; | |
10408 | ||
10409 | case NT_PPC_DSCR: | |
10410 | if (note->namesz == 6 | |
10411 | && strcmp (note->namedata, "LINUX") == 0) | |
10412 | return elfcore_grok_ppc_dscr (abfd, note); | |
10413 | else | |
10414 | return true; | |
10415 | ||
10416 | case NT_PPC_EBB: | |
10417 | if (note->namesz == 6 | |
10418 | && strcmp (note->namedata, "LINUX") == 0) | |
10419 | return elfcore_grok_ppc_ebb (abfd, note); | |
10420 | else | |
10421 | return true; | |
10422 | ||
10423 | case NT_PPC_PMU: | |
10424 | if (note->namesz == 6 | |
10425 | && strcmp (note->namedata, "LINUX") == 0) | |
10426 | return elfcore_grok_ppc_pmu (abfd, note); | |
10427 | else | |
10428 | return true; | |
10429 | ||
10430 | case NT_PPC_TM_CGPR: | |
10431 | if (note->namesz == 6 | |
10432 | && strcmp (note->namedata, "LINUX") == 0) | |
10433 | return elfcore_grok_ppc_tm_cgpr (abfd, note); | |
10434 | else | |
10435 | return true; | |
10436 | ||
10437 | case NT_PPC_TM_CFPR: | |
10438 | if (note->namesz == 6 | |
10439 | && strcmp (note->namedata, "LINUX") == 0) | |
10440 | return elfcore_grok_ppc_tm_cfpr (abfd, note); | |
10441 | else | |
10442 | return true; | |
10443 | ||
10444 | case NT_PPC_TM_CVMX: | |
10445 | if (note->namesz == 6 | |
10446 | && strcmp (note->namedata, "LINUX") == 0) | |
10447 | return elfcore_grok_ppc_tm_cvmx (abfd, note); | |
10448 | else | |
10449 | return true; | |
10450 | ||
10451 | case NT_PPC_TM_CVSX: | |
10452 | if (note->namesz == 6 | |
10453 | && strcmp (note->namedata, "LINUX") == 0) | |
10454 | return elfcore_grok_ppc_tm_cvsx (abfd, note); | |
10455 | else | |
10456 | return true; | |
10457 | ||
10458 | case NT_PPC_TM_SPR: | |
10459 | if (note->namesz == 6 | |
10460 | && strcmp (note->namedata, "LINUX") == 0) | |
10461 | return elfcore_grok_ppc_tm_spr (abfd, note); | |
10462 | else | |
10463 | return true; | |
10464 | ||
10465 | case NT_PPC_TM_CTAR: | |
10466 | if (note->namesz == 6 | |
10467 | && strcmp (note->namedata, "LINUX") == 0) | |
10468 | return elfcore_grok_ppc_tm_ctar (abfd, note); | |
10469 | else | |
10470 | return true; | |
10471 | ||
10472 | case NT_PPC_TM_CPPR: | |
10473 | if (note->namesz == 6 | |
10474 | && strcmp (note->namedata, "LINUX") == 0) | |
10475 | return elfcore_grok_ppc_tm_cppr (abfd, note); | |
10476 | else | |
10477 | return true; | |
10478 | ||
10479 | case NT_PPC_TM_CDSCR: | |
10480 | if (note->namesz == 6 | |
10481 | && strcmp (note->namedata, "LINUX") == 0) | |
10482 | return elfcore_grok_ppc_tm_cdscr (abfd, note); | |
10483 | else | |
10484 | return true; | |
10485 | ||
10486 | case NT_S390_HIGH_GPRS: | |
10487 | if (note->namesz == 6 | |
10488 | && strcmp (note->namedata, "LINUX") == 0) | |
10489 | return elfcore_grok_s390_high_gprs (abfd, note); | |
10490 | else | |
10491 | return true; | |
10492 | ||
10493 | case NT_S390_TIMER: | |
10494 | if (note->namesz == 6 | |
10495 | && strcmp (note->namedata, "LINUX") == 0) | |
10496 | return elfcore_grok_s390_timer (abfd, note); | |
10497 | else | |
10498 | return true; | |
10499 | ||
10500 | case NT_S390_TODCMP: | |
10501 | if (note->namesz == 6 | |
10502 | && strcmp (note->namedata, "LINUX") == 0) | |
10503 | return elfcore_grok_s390_todcmp (abfd, note); | |
10504 | else | |
10505 | return true; | |
10506 | ||
10507 | case NT_S390_TODPREG: | |
10508 | if (note->namesz == 6 | |
10509 | && strcmp (note->namedata, "LINUX") == 0) | |
10510 | return elfcore_grok_s390_todpreg (abfd, note); | |
10511 | else | |
10512 | return true; | |
10513 | ||
10514 | case NT_S390_CTRS: | |
10515 | if (note->namesz == 6 | |
10516 | && strcmp (note->namedata, "LINUX") == 0) | |
10517 | return elfcore_grok_s390_ctrs (abfd, note); | |
10518 | else | |
10519 | return true; | |
10520 | ||
10521 | case NT_S390_PREFIX: | |
10522 | if (note->namesz == 6 | |
10523 | && strcmp (note->namedata, "LINUX") == 0) | |
10524 | return elfcore_grok_s390_prefix (abfd, note); | |
10525 | else | |
10526 | return true; | |
10527 | ||
10528 | case NT_S390_LAST_BREAK: | |
10529 | if (note->namesz == 6 | |
10530 | && strcmp (note->namedata, "LINUX") == 0) | |
10531 | return elfcore_grok_s390_last_break (abfd, note); | |
10532 | else | |
10533 | return true; | |
10534 | ||
10535 | case NT_S390_SYSTEM_CALL: | |
10536 | if (note->namesz == 6 | |
10537 | && strcmp (note->namedata, "LINUX") == 0) | |
10538 | return elfcore_grok_s390_system_call (abfd, note); | |
10539 | else | |
10540 | return true; | |
10541 | ||
10542 | case NT_S390_TDB: | |
10543 | if (note->namesz == 6 | |
10544 | && strcmp (note->namedata, "LINUX") == 0) | |
10545 | return elfcore_grok_s390_tdb (abfd, note); | |
10546 | else | |
10547 | return true; | |
10548 | ||
10549 | case NT_S390_VXRS_LOW: | |
10550 | if (note->namesz == 6 | |
10551 | && strcmp (note->namedata, "LINUX") == 0) | |
10552 | return elfcore_grok_s390_vxrs_low (abfd, note); | |
10553 | else | |
10554 | return true; | |
10555 | ||
10556 | case NT_S390_VXRS_HIGH: | |
10557 | if (note->namesz == 6 | |
10558 | && strcmp (note->namedata, "LINUX") == 0) | |
10559 | return elfcore_grok_s390_vxrs_high (abfd, note); | |
10560 | else | |
10561 | return true; | |
10562 | ||
10563 | case NT_S390_GS_CB: | |
10564 | if (note->namesz == 6 | |
10565 | && strcmp (note->namedata, "LINUX") == 0) | |
10566 | return elfcore_grok_s390_gs_cb (abfd, note); | |
10567 | else | |
10568 | return true; | |
10569 | ||
10570 | case NT_S390_GS_BC: | |
10571 | if (note->namesz == 6 | |
10572 | && strcmp (note->namedata, "LINUX") == 0) | |
10573 | return elfcore_grok_s390_gs_bc (abfd, note); | |
10574 | else | |
10575 | return true; | |
10576 | ||
10577 | case NT_ARC_V2: | |
10578 | if (note->namesz == 6 | |
10579 | && strcmp (note->namedata, "LINUX") == 0) | |
10580 | return elfcore_grok_arc_v2 (abfd, note); | |
10581 | else | |
10582 | return true; | |
10583 | ||
10584 | case NT_ARM_VFP: | |
10585 | if (note->namesz == 6 | |
10586 | && strcmp (note->namedata, "LINUX") == 0) | |
10587 | return elfcore_grok_arm_vfp (abfd, note); | |
10588 | else | |
10589 | return true; | |
10590 | ||
10591 | case NT_ARM_TLS: | |
10592 | if (note->namesz == 6 | |
10593 | && strcmp (note->namedata, "LINUX") == 0) | |
10594 | return elfcore_grok_aarch_tls (abfd, note); | |
10595 | else | |
10596 | return true; | |
10597 | ||
10598 | case NT_ARM_HW_BREAK: | |
10599 | if (note->namesz == 6 | |
10600 | && strcmp (note->namedata, "LINUX") == 0) | |
10601 | return elfcore_grok_aarch_hw_break (abfd, note); | |
10602 | else | |
10603 | return true; | |
10604 | ||
10605 | case NT_ARM_HW_WATCH: | |
10606 | if (note->namesz == 6 | |
10607 | && strcmp (note->namedata, "LINUX") == 0) | |
10608 | return elfcore_grok_aarch_hw_watch (abfd, note); | |
10609 | else | |
10610 | return true; | |
10611 | ||
10612 | case NT_ARM_SVE: | |
10613 | if (note->namesz == 6 | |
10614 | && strcmp (note->namedata, "LINUX") == 0) | |
10615 | return elfcore_grok_aarch_sve (abfd, note); | |
10616 | else | |
10617 | return true; | |
10618 | ||
10619 | case NT_ARM_PAC_MASK: | |
10620 | if (note->namesz == 6 | |
10621 | && strcmp (note->namedata, "LINUX") == 0) | |
10622 | return elfcore_grok_aarch_pauth (abfd, note); | |
10623 | else | |
10624 | return true; | |
10625 | ||
10626 | case NT_ARM_TAGGED_ADDR_CTRL: | |
10627 | if (note->namesz == 6 | |
10628 | && strcmp (note->namedata, "LINUX") == 0) | |
10629 | return elfcore_grok_aarch_mte (abfd, note); | |
10630 | else | |
10631 | return true; | |
10632 | ||
10633 | case NT_GDB_TDESC: | |
10634 | if (note->namesz == 4 | |
10635 | && strcmp (note->namedata, "GDB") == 0) | |
10636 | return elfcore_grok_gdb_tdesc (abfd, note); | |
10637 | else | |
10638 | return true; | |
10639 | ||
10640 | case NT_RISCV_CSR: | |
10641 | if (note->namesz == 4 | |
10642 | && strcmp (note->namedata, "GDB") == 0) | |
10643 | return elfcore_grok_riscv_csr (abfd, note); | |
10644 | else | |
10645 | return true; | |
10646 | ||
10647 | case NT_LARCH_CPUCFG: | |
10648 | if (note->namesz == 6 | |
10649 | && strcmp (note->namedata, "LINUX") == 0) | |
10650 | return elfcore_grok_loongarch_cpucfg (abfd, note); | |
10651 | else | |
10652 | return true; | |
10653 | ||
10654 | case NT_LARCH_LBT: | |
10655 | if (note->namesz == 6 | |
10656 | && strcmp (note->namedata, "LINUX") == 0) | |
10657 | return elfcore_grok_loongarch_lbt (abfd, note); | |
10658 | else | |
10659 | return true; | |
10660 | ||
10661 | case NT_LARCH_LSX: | |
10662 | if (note->namesz == 6 | |
10663 | && strcmp (note->namedata, "LINUX") == 0) | |
10664 | return elfcore_grok_loongarch_lsx (abfd, note); | |
10665 | else | |
10666 | return true; | |
10667 | ||
10668 | case NT_LARCH_LASX: | |
10669 | if (note->namesz == 6 | |
10670 | && strcmp (note->namedata, "LINUX") == 0) | |
10671 | return elfcore_grok_loongarch_lasx (abfd, note); | |
10672 | else | |
10673 | return true; | |
10674 | ||
10675 | case NT_PRPSINFO: | |
10676 | case NT_PSINFO: | |
10677 | if (bed->elf_backend_grok_psinfo) | |
10678 | if ((*bed->elf_backend_grok_psinfo) (abfd, note)) | |
10679 | return true; | |
10680 | #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) | |
10681 | return elfcore_grok_psinfo (abfd, note); | |
10682 | #else | |
10683 | return true; | |
10684 | #endif | |
10685 | ||
10686 | case NT_AUXV: | |
10687 | return elfcore_make_auxv_note_section (abfd, note, 0); | |
10688 | ||
10689 | case NT_FILE: | |
10690 | return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.file", | |
10691 | note); | |
10692 | ||
10693 | case NT_SIGINFO: | |
10694 | return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.siginfo", | |
10695 | note); | |
10696 | ||
10697 | } | |
10698 | } | |
10699 | ||
10700 | static bool | |
10701 | elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note) | |
10702 | { | |
10703 | struct bfd_build_id* build_id; | |
10704 | ||
10705 | if (note->descsz == 0) | |
10706 | return false; | |
10707 | ||
10708 | build_id = bfd_alloc (abfd, sizeof (struct bfd_build_id) - 1 + note->descsz); | |
10709 | if (build_id == NULL) | |
10710 | return false; | |
10711 | ||
10712 | build_id->size = note->descsz; | |
10713 | memcpy (build_id->data, note->descdata, note->descsz); | |
10714 | abfd->build_id = build_id; | |
10715 | ||
10716 | return true; | |
10717 | } | |
10718 | ||
10719 | static bool | |
10720 | elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note) | |
10721 | { | |
10722 | switch (note->type) | |
10723 | { | |
10724 | default: | |
10725 | return true; | |
10726 | ||
10727 | case NT_GNU_PROPERTY_TYPE_0: | |
10728 | return _bfd_elf_parse_gnu_properties (abfd, note); | |
10729 | ||
10730 | case NT_GNU_BUILD_ID: | |
10731 | return elfobj_grok_gnu_build_id (abfd, note); | |
10732 | } | |
10733 | } | |
10734 | ||
10735 | static bool | |
10736 | elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note) | |
10737 | { | |
10738 | struct sdt_note *cur = | |
10739 | (struct sdt_note *) bfd_alloc (abfd, | |
10740 | sizeof (struct sdt_note) + note->descsz); | |
10741 | ||
10742 | cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head; | |
10743 | cur->size = (bfd_size_type) note->descsz; | |
10744 | memcpy (cur->data, note->descdata, note->descsz); | |
10745 | ||
10746 | elf_tdata (abfd)->sdt_note_head = cur; | |
10747 | ||
10748 | return true; | |
10749 | } | |
10750 | ||
10751 | static bool | |
10752 | elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note) | |
10753 | { | |
10754 | switch (note->type) | |
10755 | { | |
10756 | case NT_STAPSDT: | |
10757 | return elfobj_grok_stapsdt_note_1 (abfd, note); | |
10758 | ||
10759 | default: | |
10760 | return true; | |
10761 | } | |
10762 | } | |
10763 | ||
10764 | static bool | |
10765 | elfcore_grok_freebsd_psinfo (bfd *abfd, Elf_Internal_Note *note) | |
10766 | { | |
10767 | size_t offset; | |
10768 | ||
10769 | switch (elf_elfheader (abfd)->e_ident[EI_CLASS]) | |
10770 | { | |
10771 | case ELFCLASS32: | |
10772 | if (note->descsz < 108) | |
10773 | return false; | |
10774 | break; | |
10775 | ||
10776 | case ELFCLASS64: | |
10777 | if (note->descsz < 120) | |
10778 | return false; | |
10779 | break; | |
10780 | ||
10781 | default: | |
10782 | return false; | |
10783 | } | |
10784 | ||
10785 | /* Check for version 1 in pr_version. */ | |
10786 | if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1) | |
10787 | return false; | |
10788 | ||
10789 | offset = 4; | |
10790 | ||
10791 | /* Skip over pr_psinfosz. */ | |
10792 | if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32) | |
10793 | offset += 4; | |
10794 | else | |
10795 | { | |
10796 | offset += 4; /* Padding before pr_psinfosz. */ | |
10797 | offset += 8; | |
10798 | } | |
10799 | ||
10800 | /* pr_fname is PRFNAMESZ (16) + 1 bytes in size. */ | |
10801 | elf_tdata (abfd)->core->program | |
10802 | = _bfd_elfcore_strndup (abfd, note->descdata + offset, 17); | |
10803 | offset += 17; | |
10804 | ||
10805 | /* pr_psargs is PRARGSZ (80) + 1 bytes in size. */ | |
10806 | elf_tdata (abfd)->core->command | |
10807 | = _bfd_elfcore_strndup (abfd, note->descdata + offset, 81); | |
10808 | offset += 81; | |
10809 | ||
10810 | /* Padding before pr_pid. */ | |
10811 | offset += 2; | |
10812 | ||
10813 | /* The pr_pid field was added in version "1a". */ | |
10814 | if (note->descsz < offset + 4) | |
10815 | return true; | |
10816 | ||
10817 | elf_tdata (abfd)->core->pid | |
10818 | = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset); | |
10819 | ||
10820 | return true; | |
10821 | } | |
10822 | ||
10823 | static bool | |
10824 | elfcore_grok_freebsd_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
10825 | { | |
10826 | size_t offset; | |
10827 | size_t size; | |
10828 | size_t min_size; | |
10829 | ||
10830 | /* Compute offset of pr_getregsz, skipping over pr_statussz. | |
10831 | Also compute minimum size of this note. */ | |
10832 | switch (elf_elfheader (abfd)->e_ident[EI_CLASS]) | |
10833 | { | |
10834 | case ELFCLASS32: | |
10835 | offset = 4 + 4; | |
10836 | min_size = offset + (4 * 2) + 4 + 4 + 4; | |
10837 | break; | |
10838 | ||
10839 | case ELFCLASS64: | |
10840 | offset = 4 + 4 + 8; /* Includes padding before pr_statussz. */ | |
10841 | min_size = offset + (8 * 2) + 4 + 4 + 4 + 4; | |
10842 | break; | |
10843 | ||
10844 | default: | |
10845 | return false; | |
10846 | } | |
10847 | ||
10848 | if (note->descsz < min_size) | |
10849 | return false; | |
10850 | ||
10851 | /* Check for version 1 in pr_version. */ | |
10852 | if (bfd_h_get_32 (abfd, (bfd_byte *) note->descdata) != 1) | |
10853 | return false; | |
10854 | ||
10855 | /* Extract size of pr_reg from pr_gregsetsz. */ | |
10856 | /* Skip over pr_gregsetsz and pr_fpregsetsz. */ | |
10857 | if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS32) | |
10858 | { | |
10859 | size = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset); | |
10860 | offset += 4 * 2; | |
10861 | } | |
10862 | else | |
10863 | { | |
10864 | size = bfd_h_get_64 (abfd, (bfd_byte *) note->descdata + offset); | |
10865 | offset += 8 * 2; | |
10866 | } | |
10867 | ||
10868 | /* Skip over pr_osreldate. */ | |
10869 | offset += 4; | |
10870 | ||
10871 | /* Read signal from pr_cursig. */ | |
10872 | if (elf_tdata (abfd)->core->signal == 0) | |
10873 | elf_tdata (abfd)->core->signal | |
10874 | = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset); | |
10875 | offset += 4; | |
10876 | ||
10877 | /* Read TID from pr_pid. */ | |
10878 | elf_tdata (abfd)->core->lwpid | |
10879 | = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + offset); | |
10880 | offset += 4; | |
10881 | ||
10882 | /* Padding before pr_reg. */ | |
10883 | if (elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64) | |
10884 | offset += 4; | |
10885 | ||
10886 | /* Make sure that there is enough data remaining in the note. */ | |
10887 | if ((note->descsz - offset) < size) | |
10888 | return false; | |
10889 | ||
10890 | /* Make a ".reg/999" section and a ".reg" section. */ | |
10891 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
10892 | size, note->descpos + offset); | |
10893 | } | |
10894 | ||
10895 | static bool | |
10896 | elfcore_grok_freebsd_note (bfd *abfd, Elf_Internal_Note *note) | |
10897 | { | |
10898 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
10899 | ||
10900 | switch (note->type) | |
10901 | { | |
10902 | case NT_PRSTATUS: | |
10903 | if (bed->elf_backend_grok_freebsd_prstatus) | |
10904 | if ((*bed->elf_backend_grok_freebsd_prstatus) (abfd, note)) | |
10905 | return true; | |
10906 | return elfcore_grok_freebsd_prstatus (abfd, note); | |
10907 | ||
10908 | case NT_FPREGSET: | |
10909 | return elfcore_grok_prfpreg (abfd, note); | |
10910 | ||
10911 | case NT_PRPSINFO: | |
10912 | return elfcore_grok_freebsd_psinfo (abfd, note); | |
10913 | ||
10914 | case NT_FREEBSD_THRMISC: | |
10915 | if (note->namesz == 8) | |
10916 | return elfcore_make_note_pseudosection (abfd, ".thrmisc", note); | |
10917 | else | |
10918 | return true; | |
10919 | ||
10920 | case NT_FREEBSD_PROCSTAT_PROC: | |
10921 | return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.proc", | |
10922 | note); | |
10923 | ||
10924 | case NT_FREEBSD_PROCSTAT_FILES: | |
10925 | return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.files", | |
10926 | note); | |
10927 | ||
10928 | case NT_FREEBSD_PROCSTAT_VMMAP: | |
10929 | return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.vmmap", | |
10930 | note); | |
10931 | ||
10932 | case NT_FREEBSD_PROCSTAT_AUXV: | |
10933 | return elfcore_make_auxv_note_section (abfd, note, 4); | |
10934 | ||
10935 | case NT_X86_XSTATE: | |
10936 | if (note->namesz == 8) | |
10937 | return elfcore_grok_xstatereg (abfd, note); | |
10938 | else | |
10939 | return true; | |
10940 | ||
10941 | case NT_FREEBSD_PTLWPINFO: | |
10942 | return elfcore_make_note_pseudosection (abfd, ".note.freebsdcore.lwpinfo", | |
10943 | note); | |
10944 | ||
10945 | case NT_ARM_VFP: | |
10946 | return elfcore_grok_arm_vfp (abfd, note); | |
10947 | ||
10948 | default: | |
10949 | return true; | |
10950 | } | |
10951 | } | |
10952 | ||
10953 | static bool | |
10954 | elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp) | |
10955 | { | |
10956 | char *cp; | |
10957 | ||
10958 | cp = strchr (note->namedata, '@'); | |
10959 | if (cp != NULL) | |
10960 | { | |
10961 | *lwpidp = atoi(cp + 1); | |
10962 | return true; | |
10963 | } | |
10964 | return false; | |
10965 | } | |
10966 | ||
10967 | static bool | |
10968 | elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note) | |
10969 | { | |
10970 | if (note->descsz <= 0x7c + 31) | |
10971 | return false; | |
10972 | ||
10973 | /* Signal number at offset 0x08. */ | |
10974 | elf_tdata (abfd)->core->signal | |
10975 | = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08); | |
10976 | ||
10977 | /* Process ID at offset 0x50. */ | |
10978 | elf_tdata (abfd)->core->pid | |
10979 | = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50); | |
10980 | ||
10981 | /* Command name at 0x7c (max 32 bytes, including nul). */ | |
10982 | elf_tdata (abfd)->core->command | |
10983 | = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31); | |
10984 | ||
10985 | return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo", | |
10986 | note); | |
10987 | } | |
10988 | ||
10989 | static bool | |
10990 | elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note) | |
10991 | { | |
10992 | int lwp; | |
10993 | ||
10994 | if (elfcore_netbsd_get_lwpid (note, &lwp)) | |
10995 | elf_tdata (abfd)->core->lwpid = lwp; | |
10996 | ||
10997 | switch (note->type) | |
10998 | { | |
10999 | case NT_NETBSDCORE_PROCINFO: | |
11000 | /* NetBSD-specific core "procinfo". Note that we expect to | |
11001 | find this note before any of the others, which is fine, | |
11002 | since the kernel writes this note out first when it | |
11003 | creates a core file. */ | |
11004 | return elfcore_grok_netbsd_procinfo (abfd, note); | |
11005 | case NT_NETBSDCORE_AUXV: | |
11006 | /* NetBSD-specific Elf Auxiliary Vector data. */ | |
11007 | return elfcore_make_auxv_note_section (abfd, note, 4); | |
11008 | case NT_NETBSDCORE_LWPSTATUS: | |
11009 | return elfcore_make_note_pseudosection (abfd, | |
11010 | ".note.netbsdcore.lwpstatus", | |
11011 | note); | |
11012 | default: | |
11013 | break; | |
11014 | } | |
11015 | ||
11016 | /* As of March 2020 there are no other machine-independent notes | |
11017 | defined for NetBSD core files. If the note type is less | |
11018 | than the start of the machine-dependent note types, we don't | |
11019 | understand it. */ | |
11020 | ||
11021 | if (note->type < NT_NETBSDCORE_FIRSTMACH) | |
11022 | return true; | |
11023 | ||
11024 | ||
11025 | switch (bfd_get_arch (abfd)) | |
11026 | { | |
11027 | /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and | |
11028 | PT_GETFPREGS == mach+2. */ | |
11029 | ||
11030 | case bfd_arch_aarch64: | |
11031 | case bfd_arch_alpha: | |
11032 | case bfd_arch_sparc: | |
11033 | switch (note->type) | |
11034 | { | |
11035 | case NT_NETBSDCORE_FIRSTMACH+0: | |
11036 | return elfcore_make_note_pseudosection (abfd, ".reg", note); | |
11037 | ||
11038 | case NT_NETBSDCORE_FIRSTMACH+2: | |
11039 | return elfcore_make_note_pseudosection (abfd, ".reg2", note); | |
11040 | ||
11041 | default: | |
11042 | return true; | |
11043 | } | |
11044 | ||
11045 | /* On SuperH, PT_GETREGS == mach+3 and PT_GETFPREGS == mach+5. | |
11046 | There's also old PT___GETREGS40 == mach + 1 for old reg | |
11047 | structure which lacks GBR. */ | |
11048 | ||
11049 | case bfd_arch_sh: | |
11050 | switch (note->type) | |
11051 | { | |
11052 | case NT_NETBSDCORE_FIRSTMACH+3: | |
11053 | return elfcore_make_note_pseudosection (abfd, ".reg", note); | |
11054 | ||
11055 | case NT_NETBSDCORE_FIRSTMACH+5: | |
11056 | return elfcore_make_note_pseudosection (abfd, ".reg2", note); | |
11057 | ||
11058 | default: | |
11059 | return true; | |
11060 | } | |
11061 | ||
11062 | /* On all other arch's, PT_GETREGS == mach+1 and | |
11063 | PT_GETFPREGS == mach+3. */ | |
11064 | ||
11065 | default: | |
11066 | switch (note->type) | |
11067 | { | |
11068 | case NT_NETBSDCORE_FIRSTMACH+1: | |
11069 | return elfcore_make_note_pseudosection (abfd, ".reg", note); | |
11070 | ||
11071 | case NT_NETBSDCORE_FIRSTMACH+3: | |
11072 | return elfcore_make_note_pseudosection (abfd, ".reg2", note); | |
11073 | ||
11074 | default: | |
11075 | return true; | |
11076 | } | |
11077 | } | |
11078 | /* NOTREACHED */ | |
11079 | } | |
11080 | ||
11081 | static bool | |
11082 | elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note) | |
11083 | { | |
11084 | if (note->descsz <= 0x48 + 31) | |
11085 | return false; | |
11086 | ||
11087 | /* Signal number at offset 0x08. */ | |
11088 | elf_tdata (abfd)->core->signal | |
11089 | = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08); | |
11090 | ||
11091 | /* Process ID at offset 0x20. */ | |
11092 | elf_tdata (abfd)->core->pid | |
11093 | = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20); | |
11094 | ||
11095 | /* Command name at 0x48 (max 32 bytes, including nul). */ | |
11096 | elf_tdata (abfd)->core->command | |
11097 | = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31); | |
11098 | ||
11099 | return true; | |
11100 | } | |
11101 | ||
11102 | /* Processes Solaris's process status note. | |
11103 | sig_off ~ offsetof(prstatus_t, pr_cursig) | |
11104 | pid_off ~ offsetof(prstatus_t, pr_pid) | |
11105 | lwpid_off ~ offsetof(prstatus_t, pr_who) | |
11106 | gregset_size ~ sizeof(gregset_t) | |
11107 | gregset_offset ~ offsetof(prstatus_t, pr_reg) */ | |
11108 | ||
11109 | static bool | |
11110 | elfcore_grok_solaris_prstatus (bfd *abfd, Elf_Internal_Note* note, int sig_off, | |
11111 | int pid_off, int lwpid_off, size_t gregset_size, | |
11112 | size_t gregset_offset) | |
11113 | { | |
11114 | asection *sect = NULL; | |
11115 | elf_tdata (abfd)->core->signal | |
11116 | = bfd_get_16 (abfd, note->descdata + sig_off); | |
11117 | elf_tdata (abfd)->core->pid | |
11118 | = bfd_get_32 (abfd, note->descdata + pid_off); | |
11119 | elf_tdata (abfd)->core->lwpid | |
11120 | = bfd_get_32 (abfd, note->descdata + lwpid_off); | |
11121 | ||
11122 | sect = bfd_get_section_by_name (abfd, ".reg"); | |
11123 | if (sect != NULL) | |
11124 | sect->size = gregset_size; | |
11125 | ||
11126 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", gregset_size, | |
11127 | note->descpos + gregset_offset); | |
11128 | } | |
11129 | ||
11130 | /* Gets program and arguments from a core. | |
11131 | prog_off ~ offsetof(prpsinfo | psinfo_t, pr_fname) | |
11132 | comm_off ~ offsetof(prpsinfo | psinfo_t, pr_psargs) */ | |
11133 | ||
11134 | static bool | |
11135 | elfcore_grok_solaris_info(bfd *abfd, Elf_Internal_Note* note, | |
11136 | int prog_off, int comm_off) | |
11137 | { | |
11138 | elf_tdata (abfd)->core->program | |
11139 | = _bfd_elfcore_strndup (abfd, note->descdata + prog_off, 16); | |
11140 | elf_tdata (abfd)->core->command | |
11141 | = _bfd_elfcore_strndup (abfd, note->descdata + comm_off, 80); | |
11142 | ||
11143 | return true; | |
11144 | } | |
11145 | ||
11146 | /* Processes Solaris's LWP status note. | |
11147 | gregset_size ~ sizeof(gregset_t) | |
11148 | gregset_off ~ offsetof(lwpstatus_t, pr_reg) | |
11149 | fpregset_size ~ sizeof(fpregset_t) | |
11150 | fpregset_off ~ offsetof(lwpstatus_t, pr_fpreg) */ | |
11151 | ||
11152 | static bool | |
11153 | elfcore_grok_solaris_lwpstatus (bfd *abfd, Elf_Internal_Note* note, | |
11154 | size_t gregset_size, int gregset_off, | |
11155 | size_t fpregset_size, int fpregset_off) | |
11156 | { | |
11157 | asection *sect = NULL; | |
11158 | char reg2_section_name[16] = { 0 }; | |
11159 | ||
11160 | (void) snprintf (reg2_section_name, 16, "%s/%i", ".reg2", | |
11161 | elf_tdata (abfd)->core->lwpid); | |
11162 | ||
11163 | /* offsetof(lwpstatus_t, pr_lwpid) */ | |
11164 | elf_tdata (abfd)->core->lwpid | |
11165 | = bfd_get_32 (abfd, note->descdata + 4); | |
11166 | /* offsetof(lwpstatus_t, pr_cursig) */ | |
11167 | elf_tdata (abfd)->core->signal | |
11168 | = bfd_get_16 (abfd, note->descdata + 12); | |
11169 | ||
11170 | sect = bfd_get_section_by_name (abfd, ".reg"); | |
11171 | if (sect != NULL) | |
11172 | sect->size = gregset_size; | |
11173 | else if (!_bfd_elfcore_make_pseudosection (abfd, ".reg", gregset_size, | |
11174 | note->descpos + gregset_off)) | |
11175 | return false; | |
11176 | ||
11177 | sect = bfd_get_section_by_name (abfd, reg2_section_name); | |
11178 | if (sect != NULL) | |
11179 | { | |
11180 | sect->size = fpregset_size; | |
11181 | sect->filepos = note->descpos + fpregset_off; | |
11182 | sect->alignment_power = 2; | |
11183 | } | |
11184 | else if (!_bfd_elfcore_make_pseudosection (abfd, ".reg2", fpregset_size, | |
11185 | note->descpos + fpregset_off)) | |
11186 | return false; | |
11187 | ||
11188 | return true; | |
11189 | } | |
11190 | ||
11191 | static bool | |
11192 | elfcore_grok_solaris_note_impl (bfd *abfd, Elf_Internal_Note *note) | |
11193 | { | |
11194 | if (note == NULL) | |
11195 | return false; | |
11196 | ||
11197 | /* core files are identified as 32- or 64-bit, SPARC or x86, | |
11198 | by the size of the descsz which matches the sizeof() | |
11199 | the type appropriate for that note type (e.g., prstatus_t for | |
11200 | SOLARIS_NT_PRSTATUS) for the corresponding architecture | |
11201 | on Solaris. The core file bitness may differ from the bitness of | |
11202 | gdb itself, so fixed values are used instead of sizeof(). | |
11203 | Appropriate fixed offsets are also used to obtain data from | |
11204 | the note. */ | |
11205 | ||
11206 | switch ((int) note->type) | |
11207 | { | |
11208 | case SOLARIS_NT_PRSTATUS: | |
11209 | switch (note->descsz) | |
11210 | { | |
11211 | case 508: /* sizeof(prstatus_t) SPARC 32-bit */ | |
11212 | return elfcore_grok_solaris_prstatus(abfd, note, | |
11213 | 136, 216, 308, 152, 356); | |
11214 | case 904: /* sizeof(prstatus_t) SPARC 64-bit */ | |
11215 | return elfcore_grok_solaris_prstatus(abfd, note, | |
11216 | 264, 360, 520, 304, 600); | |
11217 | case 432: /* sizeof(prstatus_t) Intel 32-bit */ | |
11218 | return elfcore_grok_solaris_prstatus(abfd, note, | |
11219 | 136, 216, 308, 76, 356); | |
11220 | case 824: /* sizeof(prstatus_t) Intel 64-bit */ | |
11221 | return elfcore_grok_solaris_prstatus(abfd, note, | |
11222 | 264, 360, 520, 224, 600); | |
11223 | default: | |
11224 | return true; | |
11225 | } | |
11226 | ||
11227 | case SOLARIS_NT_PSINFO: | |
11228 | case SOLARIS_NT_PRPSINFO: | |
11229 | switch (note->descsz) | |
11230 | { | |
11231 | case 260: /* sizeof(prpsinfo_t) SPARC and Intel 32-bit */ | |
11232 | return elfcore_grok_solaris_info(abfd, note, 84, 100); | |
11233 | case 328: /* sizeof(prpsinfo_t) SPARC and Intel 64-bit */ | |
11234 | return elfcore_grok_solaris_info(abfd, note, 120, 136); | |
11235 | case 360: /* sizeof(psinfo_t) SPARC and Intel 32-bit */ | |
11236 | return elfcore_grok_solaris_info(abfd, note, 88, 104); | |
11237 | case 440: /* sizeof(psinfo_t) SPARC and Intel 64-bit */ | |
11238 | return elfcore_grok_solaris_info(abfd, note, 136, 152); | |
11239 | default: | |
11240 | return true; | |
11241 | } | |
11242 | ||
11243 | case SOLARIS_NT_LWPSTATUS: | |
11244 | switch (note->descsz) | |
11245 | { | |
11246 | case 896: /* sizeof(lwpstatus_t) SPARC 32-bit */ | |
11247 | return elfcore_grok_solaris_lwpstatus(abfd, note, | |
11248 | 152, 344, 400, 496); | |
11249 | case 1392: /* sizeof(lwpstatus_t) SPARC 64-bit */ | |
11250 | return elfcore_grok_solaris_lwpstatus(abfd, note, | |
11251 | 304, 544, 544, 848); | |
11252 | case 800: /* sizeof(lwpstatus_t) Intel 32-bit */ | |
11253 | return elfcore_grok_solaris_lwpstatus(abfd, note, | |
11254 | 76, 344, 380, 420); | |
11255 | case 1296: /* sizeof(lwpstatus_t) Intel 64-bit */ | |
11256 | return elfcore_grok_solaris_lwpstatus(abfd, note, | |
11257 | 224, 544, 528, 768); | |
11258 | default: | |
11259 | return true; | |
11260 | } | |
11261 | ||
11262 | case SOLARIS_NT_LWPSINFO: | |
11263 | /* sizeof(lwpsinfo_t) on 32- and 64-bit, respectively */ | |
11264 | if (note->descsz == 128 || note->descsz == 152) | |
11265 | elf_tdata (abfd)->core->lwpid = | |
11266 | bfd_get_32 (abfd, note->descdata + 4); | |
11267 | break; | |
11268 | ||
11269 | default: | |
11270 | break; | |
11271 | } | |
11272 | ||
11273 | return true; | |
11274 | } | |
11275 | ||
11276 | /* For name starting with "CORE" this may be either a Solaris | |
11277 | core file or a gdb-generated core file. Do Solaris-specific | |
11278 | processing on selected note types first with | |
11279 | elfcore_grok_solaris_note(), then process the note | |
11280 | in elfcore_grok_note(). */ | |
11281 | ||
11282 | static bool | |
11283 | elfcore_grok_solaris_note (bfd *abfd, Elf_Internal_Note *note) | |
11284 | { | |
11285 | if (!elfcore_grok_solaris_note_impl (abfd, note)) | |
11286 | return false; | |
11287 | ||
11288 | return elfcore_grok_note (abfd, note); | |
11289 | } | |
11290 | ||
11291 | static bool | |
11292 | elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note) | |
11293 | { | |
11294 | if (note->type == NT_OPENBSD_PROCINFO) | |
11295 | return elfcore_grok_openbsd_procinfo (abfd, note); | |
11296 | ||
11297 | if (note->type == NT_OPENBSD_REGS) | |
11298 | return elfcore_make_note_pseudosection (abfd, ".reg", note); | |
11299 | ||
11300 | if (note->type == NT_OPENBSD_FPREGS) | |
11301 | return elfcore_make_note_pseudosection (abfd, ".reg2", note); | |
11302 | ||
11303 | if (note->type == NT_OPENBSD_XFPREGS) | |
11304 | return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note); | |
11305 | ||
11306 | if (note->type == NT_OPENBSD_AUXV) | |
11307 | return elfcore_make_auxv_note_section (abfd, note, 0); | |
11308 | ||
11309 | if (note->type == NT_OPENBSD_WCOOKIE) | |
11310 | { | |
11311 | asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie", | |
11312 | SEC_HAS_CONTENTS); | |
11313 | ||
11314 | if (sect == NULL) | |
11315 | return false; | |
11316 | sect->size = note->descsz; | |
11317 | sect->filepos = note->descpos; | |
11318 | sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32; | |
11319 | ||
11320 | return true; | |
11321 | } | |
11322 | ||
11323 | return true; | |
11324 | } | |
11325 | ||
11326 | static bool | |
11327 | elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid) | |
11328 | { | |
11329 | void *ddata = note->descdata; | |
11330 | char buf[100]; | |
11331 | char *name; | |
11332 | asection *sect; | |
11333 | short sig; | |
11334 | unsigned flags; | |
11335 | ||
11336 | if (note->descsz < 16) | |
11337 | return false; | |
11338 | ||
11339 | /* nto_procfs_status 'pid' field is at offset 0. */ | |
11340 | elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, (bfd_byte *) ddata); | |
11341 | ||
11342 | /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */ | |
11343 | *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4); | |
11344 | ||
11345 | /* nto_procfs_status 'flags' field is at offset 8. */ | |
11346 | flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8); | |
11347 | ||
11348 | /* nto_procfs_status 'what' field is at offset 14. */ | |
11349 | if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0) | |
11350 | { | |
11351 | elf_tdata (abfd)->core->signal = sig; | |
11352 | elf_tdata (abfd)->core->lwpid = *tid; | |
11353 | } | |
11354 | ||
11355 | /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores | |
11356 | do not come from signals so we make sure we set the current | |
11357 | thread just in case. */ | |
11358 | if (flags & 0x00000080) | |
11359 | elf_tdata (abfd)->core->lwpid = *tid; | |
11360 | ||
11361 | /* Make a ".qnx_core_status/%d" section. */ | |
11362 | sprintf (buf, ".qnx_core_status/%ld", *tid); | |
11363 | ||
11364 | name = (char *) bfd_alloc (abfd, strlen (buf) + 1); | |
11365 | if (name == NULL) | |
11366 | return false; | |
11367 | strcpy (name, buf); | |
11368 | ||
11369 | sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS); | |
11370 | if (sect == NULL) | |
11371 | return false; | |
11372 | ||
11373 | sect->size = note->descsz; | |
11374 | sect->filepos = note->descpos; | |
11375 | sect->alignment_power = 2; | |
11376 | ||
11377 | return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect)); | |
11378 | } | |
11379 | ||
11380 | static bool | |
11381 | elfcore_grok_nto_regs (bfd *abfd, | |
11382 | Elf_Internal_Note *note, | |
11383 | long tid, | |
11384 | char *base) | |
11385 | { | |
11386 | char buf[100]; | |
11387 | char *name; | |
11388 | asection *sect; | |
11389 | ||
11390 | /* Make a "(base)/%d" section. */ | |
11391 | sprintf (buf, "%s/%ld", base, tid); | |
11392 | ||
11393 | name = (char *) bfd_alloc (abfd, strlen (buf) + 1); | |
11394 | if (name == NULL) | |
11395 | return false; | |
11396 | strcpy (name, buf); | |
11397 | ||
11398 | sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS); | |
11399 | if (sect == NULL) | |
11400 | return false; | |
11401 | ||
11402 | sect->size = note->descsz; | |
11403 | sect->filepos = note->descpos; | |
11404 | sect->alignment_power = 2; | |
11405 | ||
11406 | /* This is the current thread. */ | |
11407 | if (elf_tdata (abfd)->core->lwpid == tid) | |
11408 | return elfcore_maybe_make_sect (abfd, base, sect); | |
11409 | ||
11410 | return true; | |
11411 | } | |
11412 | ||
11413 | #define BFD_QNT_CORE_INFO 7 | |
11414 | #define BFD_QNT_CORE_STATUS 8 | |
11415 | #define BFD_QNT_CORE_GREG 9 | |
11416 | #define BFD_QNT_CORE_FPREG 10 | |
11417 | ||
11418 | static bool | |
11419 | elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note) | |
11420 | { | |
11421 | /* Every GREG section has a STATUS section before it. Store the | |
11422 | tid from the previous call to pass down to the next gregs | |
11423 | function. */ | |
11424 | static long tid = 1; | |
11425 | ||
11426 | switch (note->type) | |
11427 | { | |
11428 | case BFD_QNT_CORE_INFO: | |
11429 | return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note); | |
11430 | case BFD_QNT_CORE_STATUS: | |
11431 | return elfcore_grok_nto_status (abfd, note, &tid); | |
11432 | case BFD_QNT_CORE_GREG: | |
11433 | return elfcore_grok_nto_regs (abfd, note, tid, ".reg"); | |
11434 | case BFD_QNT_CORE_FPREG: | |
11435 | return elfcore_grok_nto_regs (abfd, note, tid, ".reg2"); | |
11436 | default: | |
11437 | return true; | |
11438 | } | |
11439 | } | |
11440 | ||
11441 | static bool | |
11442 | elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note) | |
11443 | { | |
11444 | char *name; | |
11445 | asection *sect; | |
11446 | size_t len; | |
11447 | ||
11448 | /* Use note name as section name. */ | |
11449 | len = note->namesz; | |
11450 | name = (char *) bfd_alloc (abfd, len); | |
11451 | if (name == NULL) | |
11452 | return false; | |
11453 | memcpy (name, note->namedata, len); | |
11454 | name[len - 1] = '\0'; | |
11455 | ||
11456 | sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS); | |
11457 | if (sect == NULL) | |
11458 | return false; | |
11459 | ||
11460 | sect->size = note->descsz; | |
11461 | sect->filepos = note->descpos; | |
11462 | sect->alignment_power = 1; | |
11463 | ||
11464 | return true; | |
11465 | } | |
11466 | ||
11467 | /* Function: elfcore_write_note | |
11468 | ||
11469 | Inputs: | |
11470 | buffer to hold note, and current size of buffer | |
11471 | name of note | |
11472 | type of note | |
11473 | data for note | |
11474 | size of data for note | |
11475 | ||
11476 | Writes note to end of buffer. ELF64 notes are written exactly as | |
11477 | for ELF32, despite the current (as of 2006) ELF gabi specifying | |
11478 | that they ought to have 8-byte namesz and descsz field, and have | |
11479 | 8-byte alignment. Other writers, eg. Linux kernel, do the same. | |
11480 | ||
11481 | Return: | |
11482 | Pointer to realloc'd buffer, *BUFSIZ updated. */ | |
11483 | ||
11484 | char * | |
11485 | elfcore_write_note (bfd *abfd, | |
11486 | char *buf, | |
11487 | int *bufsiz, | |
11488 | const char *name, | |
11489 | int type, | |
11490 | const void *input, | |
11491 | int size) | |
11492 | { | |
11493 | Elf_External_Note *xnp; | |
11494 | size_t namesz; | |
11495 | size_t newspace; | |
11496 | char *dest; | |
11497 | ||
11498 | namesz = 0; | |
11499 | if (name != NULL) | |
11500 | namesz = strlen (name) + 1; | |
11501 | ||
11502 | newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4); | |
11503 | ||
11504 | buf = (char *) realloc (buf, *bufsiz + newspace); | |
11505 | if (buf == NULL) | |
11506 | return buf; | |
11507 | dest = buf + *bufsiz; | |
11508 | *bufsiz += newspace; | |
11509 | xnp = (Elf_External_Note *) dest; | |
11510 | H_PUT_32 (abfd, namesz, xnp->namesz); | |
11511 | H_PUT_32 (abfd, size, xnp->descsz); | |
11512 | H_PUT_32 (abfd, type, xnp->type); | |
11513 | dest = xnp->name; | |
11514 | if (name != NULL) | |
11515 | { | |
11516 | memcpy (dest, name, namesz); | |
11517 | dest += namesz; | |
11518 | while (namesz & 3) | |
11519 | { | |
11520 | *dest++ = '\0'; | |
11521 | ++namesz; | |
11522 | } | |
11523 | } | |
11524 | memcpy (dest, input, size); | |
11525 | dest += size; | |
11526 | while (size & 3) | |
11527 | { | |
11528 | *dest++ = '\0'; | |
11529 | ++size; | |
11530 | } | |
11531 | return buf; | |
11532 | } | |
11533 | ||
11534 | /* gcc-8 warns (*) on all the strncpy calls in this function about | |
11535 | possible string truncation. The "truncation" is not a bug. We | |
11536 | have an external representation of structs with fields that are not | |
11537 | necessarily NULL terminated and corresponding internal | |
11538 | representation fields that are one larger so that they can always | |
11539 | be NULL terminated. | |
11540 | gcc versions between 4.2 and 4.6 do not allow pragma control of | |
11541 | diagnostics inside functions, giving a hard error if you try to use | |
11542 | the finer control available with later versions. | |
11543 | gcc prior to 4.2 warns about diagnostic push and pop. | |
11544 | gcc-5, gcc-6 and gcc-7 warn that -Wstringop-truncation is unknown, | |
11545 | unless you also add #pragma GCC diagnostic ignored "-Wpragma". | |
11546 | (*) Depending on your system header files! */ | |
11547 | #if GCC_VERSION >= 8000 | |
11548 | # pragma GCC diagnostic push | |
11549 | # pragma GCC diagnostic ignored "-Wstringop-truncation" | |
11550 | #endif | |
11551 | char * | |
11552 | elfcore_write_prpsinfo (bfd *abfd, | |
11553 | char *buf, | |
11554 | int *bufsiz, | |
11555 | const char *fname, | |
11556 | const char *psargs) | |
11557 | { | |
11558 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
11559 | ||
11560 | if (bed->elf_backend_write_core_note != NULL) | |
11561 | { | |
11562 | char *ret; | |
11563 | ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz, | |
11564 | NT_PRPSINFO, fname, psargs); | |
11565 | if (ret != NULL) | |
11566 | return ret; | |
11567 | } | |
11568 | ||
11569 | #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) | |
11570 | # if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T) | |
11571 | if (bed->s->elfclass == ELFCLASS32) | |
11572 | { | |
11573 | # if defined (HAVE_PSINFO32_T) | |
11574 | psinfo32_t data; | |
11575 | int note_type = NT_PSINFO; | |
11576 | # else | |
11577 | prpsinfo32_t data; | |
11578 | int note_type = NT_PRPSINFO; | |
11579 | # endif | |
11580 | ||
11581 | memset (&data, 0, sizeof (data)); | |
11582 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
11583 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
11584 | return elfcore_write_note (abfd, buf, bufsiz, | |
11585 | "CORE", note_type, &data, sizeof (data)); | |
11586 | } | |
11587 | else | |
11588 | # endif | |
11589 | { | |
11590 | # if defined (HAVE_PSINFO_T) | |
11591 | psinfo_t data; | |
11592 | int note_type = NT_PSINFO; | |
11593 | # else | |
11594 | prpsinfo_t data; | |
11595 | int note_type = NT_PRPSINFO; | |
11596 | # endif | |
11597 | ||
11598 | memset (&data, 0, sizeof (data)); | |
11599 | strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); | |
11600 | strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); | |
11601 | return elfcore_write_note (abfd, buf, bufsiz, | |
11602 | "CORE", note_type, &data, sizeof (data)); | |
11603 | } | |
11604 | #endif /* PSINFO_T or PRPSINFO_T */ | |
11605 | ||
11606 | free (buf); | |
11607 | return NULL; | |
11608 | } | |
11609 | #if GCC_VERSION >= 8000 | |
11610 | # pragma GCC diagnostic pop | |
11611 | #endif | |
11612 | ||
11613 | char * | |
11614 | elfcore_write_linux_prpsinfo32 | |
11615 | (bfd *abfd, char *buf, int *bufsiz, | |
11616 | const struct elf_internal_linux_prpsinfo *prpsinfo) | |
11617 | { | |
11618 | if (get_elf_backend_data (abfd)->linux_prpsinfo32_ugid16) | |
11619 | { | |
11620 | struct elf_external_linux_prpsinfo32_ugid16 data; | |
11621 | ||
11622 | swap_linux_prpsinfo32_ugid16_out (abfd, prpsinfo, &data); | |
11623 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO, | |
11624 | &data, sizeof (data)); | |
11625 | } | |
11626 | else | |
11627 | { | |
11628 | struct elf_external_linux_prpsinfo32_ugid32 data; | |
11629 | ||
11630 | swap_linux_prpsinfo32_ugid32_out (abfd, prpsinfo, &data); | |
11631 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", NT_PRPSINFO, | |
11632 | &data, sizeof (data)); | |
11633 | } | |
11634 | } | |
11635 | ||
11636 | char * | |
11637 | elfcore_write_linux_prpsinfo64 | |
11638 | (bfd *abfd, char *buf, int *bufsiz, | |
11639 | const struct elf_internal_linux_prpsinfo *prpsinfo) | |
11640 | { | |
11641 | if (get_elf_backend_data (abfd)->linux_prpsinfo64_ugid16) | |
11642 | { | |
11643 | struct elf_external_linux_prpsinfo64_ugid16 data; | |
11644 | ||
11645 | swap_linux_prpsinfo64_ugid16_out (abfd, prpsinfo, &data); | |
11646 | return elfcore_write_note (abfd, buf, bufsiz, | |
11647 | "CORE", NT_PRPSINFO, &data, sizeof (data)); | |
11648 | } | |
11649 | else | |
11650 | { | |
11651 | struct elf_external_linux_prpsinfo64_ugid32 data; | |
11652 | ||
11653 | swap_linux_prpsinfo64_ugid32_out (abfd, prpsinfo, &data); | |
11654 | return elfcore_write_note (abfd, buf, bufsiz, | |
11655 | "CORE", NT_PRPSINFO, &data, sizeof (data)); | |
11656 | } | |
11657 | } | |
11658 | ||
11659 | char * | |
11660 | elfcore_write_prstatus (bfd *abfd, | |
11661 | char *buf, | |
11662 | int *bufsiz, | |
11663 | long pid, | |
11664 | int cursig, | |
11665 | const void *gregs) | |
11666 | { | |
11667 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
11668 | ||
11669 | if (bed->elf_backend_write_core_note != NULL) | |
11670 | { | |
11671 | char *ret; | |
11672 | ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz, | |
11673 | NT_PRSTATUS, | |
11674 | pid, cursig, gregs); | |
11675 | if (ret != NULL) | |
11676 | return ret; | |
11677 | } | |
11678 | ||
11679 | #if defined (HAVE_PRSTATUS_T) | |
11680 | #if defined (HAVE_PRSTATUS32_T) | |
11681 | if (bed->s->elfclass == ELFCLASS32) | |
11682 | { | |
11683 | prstatus32_t prstat; | |
11684 | ||
11685 | memset (&prstat, 0, sizeof (prstat)); | |
11686 | prstat.pr_pid = pid; | |
11687 | prstat.pr_cursig = cursig; | |
11688 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
11689 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", | |
11690 | NT_PRSTATUS, &prstat, sizeof (prstat)); | |
11691 | } | |
11692 | else | |
11693 | #endif | |
11694 | { | |
11695 | prstatus_t prstat; | |
11696 | ||
11697 | memset (&prstat, 0, sizeof (prstat)); | |
11698 | prstat.pr_pid = pid; | |
11699 | prstat.pr_cursig = cursig; | |
11700 | memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg)); | |
11701 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", | |
11702 | NT_PRSTATUS, &prstat, sizeof (prstat)); | |
11703 | } | |
11704 | #endif /* HAVE_PRSTATUS_T */ | |
11705 | ||
11706 | free (buf); | |
11707 | return NULL; | |
11708 | } | |
11709 | ||
11710 | #if defined (HAVE_LWPSTATUS_T) | |
11711 | char * | |
11712 | elfcore_write_lwpstatus (bfd *abfd, | |
11713 | char *buf, | |
11714 | int *bufsiz, | |
11715 | long pid, | |
11716 | int cursig, | |
11717 | const void *gregs) | |
11718 | { | |
11719 | lwpstatus_t lwpstat; | |
11720 | const char *note_name = "CORE"; | |
11721 | ||
11722 | memset (&lwpstat, 0, sizeof (lwpstat)); | |
11723 | lwpstat.pr_lwpid = pid >> 16; | |
11724 | lwpstat.pr_cursig = cursig; | |
11725 | #if defined (HAVE_LWPSTATUS_T_PR_REG) | |
11726 | memcpy (&lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg)); | |
11727 | #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT) | |
11728 | #if !defined(gregs) | |
11729 | memcpy (lwpstat.pr_context.uc_mcontext.gregs, | |
11730 | gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs)); | |
11731 | #else | |
11732 | memcpy (lwpstat.pr_context.uc_mcontext.__gregs, | |
11733 | gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs)); | |
11734 | #endif | |
11735 | #endif | |
11736 | return elfcore_write_note (abfd, buf, bufsiz, note_name, | |
11737 | NT_LWPSTATUS, &lwpstat, sizeof (lwpstat)); | |
11738 | } | |
11739 | #endif /* HAVE_LWPSTATUS_T */ | |
11740 | ||
11741 | #if defined (HAVE_PSTATUS_T) | |
11742 | char * | |
11743 | elfcore_write_pstatus (bfd *abfd, | |
11744 | char *buf, | |
11745 | int *bufsiz, | |
11746 | long pid, | |
11747 | int cursig ATTRIBUTE_UNUSED, | |
11748 | const void *gregs ATTRIBUTE_UNUSED) | |
11749 | { | |
11750 | const char *note_name = "CORE"; | |
11751 | #if defined (HAVE_PSTATUS32_T) | |
11752 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
11753 | ||
11754 | if (bed->s->elfclass == ELFCLASS32) | |
11755 | { | |
11756 | pstatus32_t pstat; | |
11757 | ||
11758 | memset (&pstat, 0, sizeof (pstat)); | |
11759 | pstat.pr_pid = pid & 0xffff; | |
11760 | buf = elfcore_write_note (abfd, buf, bufsiz, note_name, | |
11761 | NT_PSTATUS, &pstat, sizeof (pstat)); | |
11762 | return buf; | |
11763 | } | |
11764 | else | |
11765 | #endif | |
11766 | { | |
11767 | pstatus_t pstat; | |
11768 | ||
11769 | memset (&pstat, 0, sizeof (pstat)); | |
11770 | pstat.pr_pid = pid & 0xffff; | |
11771 | buf = elfcore_write_note (abfd, buf, bufsiz, note_name, | |
11772 | NT_PSTATUS, &pstat, sizeof (pstat)); | |
11773 | return buf; | |
11774 | } | |
11775 | } | |
11776 | #endif /* HAVE_PSTATUS_T */ | |
11777 | ||
11778 | char * | |
11779 | elfcore_write_prfpreg (bfd *abfd, | |
11780 | char *buf, | |
11781 | int *bufsiz, | |
11782 | const void *fpregs, | |
11783 | int size) | |
11784 | { | |
11785 | const char *note_name = "CORE"; | |
11786 | return elfcore_write_note (abfd, buf, bufsiz, | |
11787 | note_name, NT_FPREGSET, fpregs, size); | |
11788 | } | |
11789 | ||
11790 | char * | |
11791 | elfcore_write_prxfpreg (bfd *abfd, | |
11792 | char *buf, | |
11793 | int *bufsiz, | |
11794 | const void *xfpregs, | |
11795 | int size) | |
11796 | { | |
11797 | char *note_name = "LINUX"; | |
11798 | return elfcore_write_note (abfd, buf, bufsiz, | |
11799 | note_name, NT_PRXFPREG, xfpregs, size); | |
11800 | } | |
11801 | ||
11802 | char * | |
11803 | elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz, | |
11804 | const void *xfpregs, int size) | |
11805 | { | |
11806 | char *note_name; | |
11807 | if (get_elf_backend_data (abfd)->elf_osabi == ELFOSABI_FREEBSD) | |
11808 | note_name = "FreeBSD"; | |
11809 | else | |
11810 | note_name = "LINUX"; | |
11811 | return elfcore_write_note (abfd, buf, bufsiz, | |
11812 | note_name, NT_X86_XSTATE, xfpregs, size); | |
11813 | } | |
11814 | ||
11815 | char * | |
11816 | elfcore_write_ppc_vmx (bfd *abfd, | |
11817 | char *buf, | |
11818 | int *bufsiz, | |
11819 | const void *ppc_vmx, | |
11820 | int size) | |
11821 | { | |
11822 | char *note_name = "LINUX"; | |
11823 | return elfcore_write_note (abfd, buf, bufsiz, | |
11824 | note_name, NT_PPC_VMX, ppc_vmx, size); | |
11825 | } | |
11826 | ||
11827 | char * | |
11828 | elfcore_write_ppc_vsx (bfd *abfd, | |
11829 | char *buf, | |
11830 | int *bufsiz, | |
11831 | const void *ppc_vsx, | |
11832 | int size) | |
11833 | { | |
11834 | char *note_name = "LINUX"; | |
11835 | return elfcore_write_note (abfd, buf, bufsiz, | |
11836 | note_name, NT_PPC_VSX, ppc_vsx, size); | |
11837 | } | |
11838 | ||
11839 | char * | |
11840 | elfcore_write_ppc_tar (bfd *abfd, | |
11841 | char *buf, | |
11842 | int *bufsiz, | |
11843 | const void *ppc_tar, | |
11844 | int size) | |
11845 | { | |
11846 | char *note_name = "LINUX"; | |
11847 | return elfcore_write_note (abfd, buf, bufsiz, | |
11848 | note_name, NT_PPC_TAR, ppc_tar, size); | |
11849 | } | |
11850 | ||
11851 | char * | |
11852 | elfcore_write_ppc_ppr (bfd *abfd, | |
11853 | char *buf, | |
11854 | int *bufsiz, | |
11855 | const void *ppc_ppr, | |
11856 | int size) | |
11857 | { | |
11858 | char *note_name = "LINUX"; | |
11859 | return elfcore_write_note (abfd, buf, bufsiz, | |
11860 | note_name, NT_PPC_PPR, ppc_ppr, size); | |
11861 | } | |
11862 | ||
11863 | char * | |
11864 | elfcore_write_ppc_dscr (bfd *abfd, | |
11865 | char *buf, | |
11866 | int *bufsiz, | |
11867 | const void *ppc_dscr, | |
11868 | int size) | |
11869 | { | |
11870 | char *note_name = "LINUX"; | |
11871 | return elfcore_write_note (abfd, buf, bufsiz, | |
11872 | note_name, NT_PPC_DSCR, ppc_dscr, size); | |
11873 | } | |
11874 | ||
11875 | char * | |
11876 | elfcore_write_ppc_ebb (bfd *abfd, | |
11877 | char *buf, | |
11878 | int *bufsiz, | |
11879 | const void *ppc_ebb, | |
11880 | int size) | |
11881 | { | |
11882 | char *note_name = "LINUX"; | |
11883 | return elfcore_write_note (abfd, buf, bufsiz, | |
11884 | note_name, NT_PPC_EBB, ppc_ebb, size); | |
11885 | } | |
11886 | ||
11887 | char * | |
11888 | elfcore_write_ppc_pmu (bfd *abfd, | |
11889 | char *buf, | |
11890 | int *bufsiz, | |
11891 | const void *ppc_pmu, | |
11892 | int size) | |
11893 | { | |
11894 | char *note_name = "LINUX"; | |
11895 | return elfcore_write_note (abfd, buf, bufsiz, | |
11896 | note_name, NT_PPC_PMU, ppc_pmu, size); | |
11897 | } | |
11898 | ||
11899 | char * | |
11900 | elfcore_write_ppc_tm_cgpr (bfd *abfd, | |
11901 | char *buf, | |
11902 | int *bufsiz, | |
11903 | const void *ppc_tm_cgpr, | |
11904 | int size) | |
11905 | { | |
11906 | char *note_name = "LINUX"; | |
11907 | return elfcore_write_note (abfd, buf, bufsiz, | |
11908 | note_name, NT_PPC_TM_CGPR, ppc_tm_cgpr, size); | |
11909 | } | |
11910 | ||
11911 | char * | |
11912 | elfcore_write_ppc_tm_cfpr (bfd *abfd, | |
11913 | char *buf, | |
11914 | int *bufsiz, | |
11915 | const void *ppc_tm_cfpr, | |
11916 | int size) | |
11917 | { | |
11918 | char *note_name = "LINUX"; | |
11919 | return elfcore_write_note (abfd, buf, bufsiz, | |
11920 | note_name, NT_PPC_TM_CFPR, ppc_tm_cfpr, size); | |
11921 | } | |
11922 | ||
11923 | char * | |
11924 | elfcore_write_ppc_tm_cvmx (bfd *abfd, | |
11925 | char *buf, | |
11926 | int *bufsiz, | |
11927 | const void *ppc_tm_cvmx, | |
11928 | int size) | |
11929 | { | |
11930 | char *note_name = "LINUX"; | |
11931 | return elfcore_write_note (abfd, buf, bufsiz, | |
11932 | note_name, NT_PPC_TM_CVMX, ppc_tm_cvmx, size); | |
11933 | } | |
11934 | ||
11935 | char * | |
11936 | elfcore_write_ppc_tm_cvsx (bfd *abfd, | |
11937 | char *buf, | |
11938 | int *bufsiz, | |
11939 | const void *ppc_tm_cvsx, | |
11940 | int size) | |
11941 | { | |
11942 | char *note_name = "LINUX"; | |
11943 | return elfcore_write_note (abfd, buf, bufsiz, | |
11944 | note_name, NT_PPC_TM_CVSX, ppc_tm_cvsx, size); | |
11945 | } | |
11946 | ||
11947 | char * | |
11948 | elfcore_write_ppc_tm_spr (bfd *abfd, | |
11949 | char *buf, | |
11950 | int *bufsiz, | |
11951 | const void *ppc_tm_spr, | |
11952 | int size) | |
11953 | { | |
11954 | char *note_name = "LINUX"; | |
11955 | return elfcore_write_note (abfd, buf, bufsiz, | |
11956 | note_name, NT_PPC_TM_SPR, ppc_tm_spr, size); | |
11957 | } | |
11958 | ||
11959 | char * | |
11960 | elfcore_write_ppc_tm_ctar (bfd *abfd, | |
11961 | char *buf, | |
11962 | int *bufsiz, | |
11963 | const void *ppc_tm_ctar, | |
11964 | int size) | |
11965 | { | |
11966 | char *note_name = "LINUX"; | |
11967 | return elfcore_write_note (abfd, buf, bufsiz, | |
11968 | note_name, NT_PPC_TM_CTAR, ppc_tm_ctar, size); | |
11969 | } | |
11970 | ||
11971 | char * | |
11972 | elfcore_write_ppc_tm_cppr (bfd *abfd, | |
11973 | char *buf, | |
11974 | int *bufsiz, | |
11975 | const void *ppc_tm_cppr, | |
11976 | int size) | |
11977 | { | |
11978 | char *note_name = "LINUX"; | |
11979 | return elfcore_write_note (abfd, buf, bufsiz, | |
11980 | note_name, NT_PPC_TM_CPPR, ppc_tm_cppr, size); | |
11981 | } | |
11982 | ||
11983 | char * | |
11984 | elfcore_write_ppc_tm_cdscr (bfd *abfd, | |
11985 | char *buf, | |
11986 | int *bufsiz, | |
11987 | const void *ppc_tm_cdscr, | |
11988 | int size) | |
11989 | { | |
11990 | char *note_name = "LINUX"; | |
11991 | return elfcore_write_note (abfd, buf, bufsiz, | |
11992 | note_name, NT_PPC_TM_CDSCR, ppc_tm_cdscr, size); | |
11993 | } | |
11994 | ||
11995 | static char * | |
11996 | elfcore_write_s390_high_gprs (bfd *abfd, | |
11997 | char *buf, | |
11998 | int *bufsiz, | |
11999 | const void *s390_high_gprs, | |
12000 | int size) | |
12001 | { | |
12002 | char *note_name = "LINUX"; | |
12003 | return elfcore_write_note (abfd, buf, bufsiz, | |
12004 | note_name, NT_S390_HIGH_GPRS, | |
12005 | s390_high_gprs, size); | |
12006 | } | |
12007 | ||
12008 | char * | |
12009 | elfcore_write_s390_timer (bfd *abfd, | |
12010 | char *buf, | |
12011 | int *bufsiz, | |
12012 | const void *s390_timer, | |
12013 | int size) | |
12014 | { | |
12015 | char *note_name = "LINUX"; | |
12016 | return elfcore_write_note (abfd, buf, bufsiz, | |
12017 | note_name, NT_S390_TIMER, s390_timer, size); | |
12018 | } | |
12019 | ||
12020 | char * | |
12021 | elfcore_write_s390_todcmp (bfd *abfd, | |
12022 | char *buf, | |
12023 | int *bufsiz, | |
12024 | const void *s390_todcmp, | |
12025 | int size) | |
12026 | { | |
12027 | char *note_name = "LINUX"; | |
12028 | return elfcore_write_note (abfd, buf, bufsiz, | |
12029 | note_name, NT_S390_TODCMP, s390_todcmp, size); | |
12030 | } | |
12031 | ||
12032 | char * | |
12033 | elfcore_write_s390_todpreg (bfd *abfd, | |
12034 | char *buf, | |
12035 | int *bufsiz, | |
12036 | const void *s390_todpreg, | |
12037 | int size) | |
12038 | { | |
12039 | char *note_name = "LINUX"; | |
12040 | return elfcore_write_note (abfd, buf, bufsiz, | |
12041 | note_name, NT_S390_TODPREG, s390_todpreg, size); | |
12042 | } | |
12043 | ||
12044 | char * | |
12045 | elfcore_write_s390_ctrs (bfd *abfd, | |
12046 | char *buf, | |
12047 | int *bufsiz, | |
12048 | const void *s390_ctrs, | |
12049 | int size) | |
12050 | { | |
12051 | char *note_name = "LINUX"; | |
12052 | return elfcore_write_note (abfd, buf, bufsiz, | |
12053 | note_name, NT_S390_CTRS, s390_ctrs, size); | |
12054 | } | |
12055 | ||
12056 | char * | |
12057 | elfcore_write_s390_prefix (bfd *abfd, | |
12058 | char *buf, | |
12059 | int *bufsiz, | |
12060 | const void *s390_prefix, | |
12061 | int size) | |
12062 | { | |
12063 | char *note_name = "LINUX"; | |
12064 | return elfcore_write_note (abfd, buf, bufsiz, | |
12065 | note_name, NT_S390_PREFIX, s390_prefix, size); | |
12066 | } | |
12067 | ||
12068 | char * | |
12069 | elfcore_write_s390_last_break (bfd *abfd, | |
12070 | char *buf, | |
12071 | int *bufsiz, | |
12072 | const void *s390_last_break, | |
12073 | int size) | |
12074 | { | |
12075 | char *note_name = "LINUX"; | |
12076 | return elfcore_write_note (abfd, buf, bufsiz, | |
12077 | note_name, NT_S390_LAST_BREAK, | |
12078 | s390_last_break, size); | |
12079 | } | |
12080 | ||
12081 | char * | |
12082 | elfcore_write_s390_system_call (bfd *abfd, | |
12083 | char *buf, | |
12084 | int *bufsiz, | |
12085 | const void *s390_system_call, | |
12086 | int size) | |
12087 | { | |
12088 | char *note_name = "LINUX"; | |
12089 | return elfcore_write_note (abfd, buf, bufsiz, | |
12090 | note_name, NT_S390_SYSTEM_CALL, | |
12091 | s390_system_call, size); | |
12092 | } | |
12093 | ||
12094 | char * | |
12095 | elfcore_write_s390_tdb (bfd *abfd, | |
12096 | char *buf, | |
12097 | int *bufsiz, | |
12098 | const void *s390_tdb, | |
12099 | int size) | |
12100 | { | |
12101 | char *note_name = "LINUX"; | |
12102 | return elfcore_write_note (abfd, buf, bufsiz, | |
12103 | note_name, NT_S390_TDB, s390_tdb, size); | |
12104 | } | |
12105 | ||
12106 | char * | |
12107 | elfcore_write_s390_vxrs_low (bfd *abfd, | |
12108 | char *buf, | |
12109 | int *bufsiz, | |
12110 | const void *s390_vxrs_low, | |
12111 | int size) | |
12112 | { | |
12113 | char *note_name = "LINUX"; | |
12114 | return elfcore_write_note (abfd, buf, bufsiz, | |
12115 | note_name, NT_S390_VXRS_LOW, s390_vxrs_low, size); | |
12116 | } | |
12117 | ||
12118 | char * | |
12119 | elfcore_write_s390_vxrs_high (bfd *abfd, | |
12120 | char *buf, | |
12121 | int *bufsiz, | |
12122 | const void *s390_vxrs_high, | |
12123 | int size) | |
12124 | { | |
12125 | char *note_name = "LINUX"; | |
12126 | return elfcore_write_note (abfd, buf, bufsiz, | |
12127 | note_name, NT_S390_VXRS_HIGH, | |
12128 | s390_vxrs_high, size); | |
12129 | } | |
12130 | ||
12131 | char * | |
12132 | elfcore_write_s390_gs_cb (bfd *abfd, | |
12133 | char *buf, | |
12134 | int *bufsiz, | |
12135 | const void *s390_gs_cb, | |
12136 | int size) | |
12137 | { | |
12138 | char *note_name = "LINUX"; | |
12139 | return elfcore_write_note (abfd, buf, bufsiz, | |
12140 | note_name, NT_S390_GS_CB, | |
12141 | s390_gs_cb, size); | |
12142 | } | |
12143 | ||
12144 | char * | |
12145 | elfcore_write_s390_gs_bc (bfd *abfd, | |
12146 | char *buf, | |
12147 | int *bufsiz, | |
12148 | const void *s390_gs_bc, | |
12149 | int size) | |
12150 | { | |
12151 | char *note_name = "LINUX"; | |
12152 | return elfcore_write_note (abfd, buf, bufsiz, | |
12153 | note_name, NT_S390_GS_BC, | |
12154 | s390_gs_bc, size); | |
12155 | } | |
12156 | ||
12157 | char * | |
12158 | elfcore_write_arm_vfp (bfd *abfd, | |
12159 | char *buf, | |
12160 | int *bufsiz, | |
12161 | const void *arm_vfp, | |
12162 | int size) | |
12163 | { | |
12164 | char *note_name = "LINUX"; | |
12165 | return elfcore_write_note (abfd, buf, bufsiz, | |
12166 | note_name, NT_ARM_VFP, arm_vfp, size); | |
12167 | } | |
12168 | ||
12169 | char * | |
12170 | elfcore_write_aarch_tls (bfd *abfd, | |
12171 | char *buf, | |
12172 | int *bufsiz, | |
12173 | const void *aarch_tls, | |
12174 | int size) | |
12175 | { | |
12176 | char *note_name = "LINUX"; | |
12177 | return elfcore_write_note (abfd, buf, bufsiz, | |
12178 | note_name, NT_ARM_TLS, aarch_tls, size); | |
12179 | } | |
12180 | ||
12181 | char * | |
12182 | elfcore_write_aarch_hw_break (bfd *abfd, | |
12183 | char *buf, | |
12184 | int *bufsiz, | |
12185 | const void *aarch_hw_break, | |
12186 | int size) | |
12187 | { | |
12188 | char *note_name = "LINUX"; | |
12189 | return elfcore_write_note (abfd, buf, bufsiz, | |
12190 | note_name, NT_ARM_HW_BREAK, aarch_hw_break, size); | |
12191 | } | |
12192 | ||
12193 | char * | |
12194 | elfcore_write_aarch_hw_watch (bfd *abfd, | |
12195 | char *buf, | |
12196 | int *bufsiz, | |
12197 | const void *aarch_hw_watch, | |
12198 | int size) | |
12199 | { | |
12200 | char *note_name = "LINUX"; | |
12201 | return elfcore_write_note (abfd, buf, bufsiz, | |
12202 | note_name, NT_ARM_HW_WATCH, aarch_hw_watch, size); | |
12203 | } | |
12204 | ||
12205 | char * | |
12206 | elfcore_write_aarch_sve (bfd *abfd, | |
12207 | char *buf, | |
12208 | int *bufsiz, | |
12209 | const void *aarch_sve, | |
12210 | int size) | |
12211 | { | |
12212 | char *note_name = "LINUX"; | |
12213 | return elfcore_write_note (abfd, buf, bufsiz, | |
12214 | note_name, NT_ARM_SVE, aarch_sve, size); | |
12215 | } | |
12216 | ||
12217 | char * | |
12218 | elfcore_write_aarch_pauth (bfd *abfd, | |
12219 | char *buf, | |
12220 | int *bufsiz, | |
12221 | const void *aarch_pauth, | |
12222 | int size) | |
12223 | { | |
12224 | char *note_name = "LINUX"; | |
12225 | return elfcore_write_note (abfd, buf, bufsiz, | |
12226 | note_name, NT_ARM_PAC_MASK, aarch_pauth, size); | |
12227 | } | |
12228 | ||
12229 | char * | |
12230 | elfcore_write_aarch_mte (bfd *abfd, | |
12231 | char *buf, | |
12232 | int *bufsiz, | |
12233 | const void *aarch_mte, | |
12234 | int size) | |
12235 | { | |
12236 | char *note_name = "LINUX"; | |
12237 | return elfcore_write_note (abfd, buf, bufsiz, | |
12238 | note_name, NT_ARM_TAGGED_ADDR_CTRL, | |
12239 | aarch_mte, | |
12240 | size); | |
12241 | } | |
12242 | ||
12243 | char * | |
12244 | elfcore_write_arc_v2 (bfd *abfd, | |
12245 | char *buf, | |
12246 | int *bufsiz, | |
12247 | const void *arc_v2, | |
12248 | int size) | |
12249 | { | |
12250 | char *note_name = "LINUX"; | |
12251 | return elfcore_write_note (abfd, buf, bufsiz, | |
12252 | note_name, NT_ARC_V2, arc_v2, size); | |
12253 | } | |
12254 | ||
12255 | char * | |
12256 | elfcore_write_loongarch_cpucfg (bfd *abfd, | |
12257 | char *buf, | |
12258 | int *bufsiz, | |
12259 | const void *loongarch_cpucfg, | |
12260 | int size) | |
12261 | { | |
12262 | char *note_name = "LINUX"; | |
12263 | return elfcore_write_note (abfd, buf, bufsiz, | |
12264 | note_name, NT_LARCH_CPUCFG, | |
12265 | loongarch_cpucfg, size); | |
12266 | } | |
12267 | ||
12268 | char * | |
12269 | elfcore_write_loongarch_lbt (bfd *abfd, | |
12270 | char *buf, | |
12271 | int *bufsiz, | |
12272 | const void *loongarch_lbt, | |
12273 | int size) | |
12274 | { | |
12275 | char *note_name = "LINUX"; | |
12276 | return elfcore_write_note (abfd, buf, bufsiz, | |
12277 | note_name, NT_LARCH_LBT, loongarch_lbt, size); | |
12278 | } | |
12279 | ||
12280 | char * | |
12281 | elfcore_write_loongarch_lsx (bfd *abfd, | |
12282 | char *buf, | |
12283 | int *bufsiz, | |
12284 | const void *loongarch_lsx, | |
12285 | int size) | |
12286 | { | |
12287 | char *note_name = "LINUX"; | |
12288 | return elfcore_write_note (abfd, buf, bufsiz, | |
12289 | note_name, NT_LARCH_LSX, loongarch_lsx, size); | |
12290 | } | |
12291 | ||
12292 | char * | |
12293 | elfcore_write_loongarch_lasx (bfd *abfd, | |
12294 | char *buf, | |
12295 | int *bufsiz, | |
12296 | const void *loongarch_lasx, | |
12297 | int size) | |
12298 | { | |
12299 | char *note_name = "LINUX"; | |
12300 | return elfcore_write_note (abfd, buf, bufsiz, | |
12301 | note_name, NT_LARCH_LASX, loongarch_lasx, size); | |
12302 | } | |
12303 | ||
12304 | /* Write the buffer of csr values in CSRS (length SIZE) into the note | |
12305 | buffer BUF and update *BUFSIZ. ABFD is the bfd the note is being | |
12306 | written into. Return a pointer to the new start of the note buffer, to | |
12307 | replace BUF which may no longer be valid. */ | |
12308 | ||
12309 | char * | |
12310 | elfcore_write_riscv_csr (bfd *abfd, | |
12311 | char *buf, | |
12312 | int *bufsiz, | |
12313 | const void *csrs, | |
12314 | int size) | |
12315 | { | |
12316 | const char *note_name = "GDB"; | |
12317 | return elfcore_write_note (abfd, buf, bufsiz, | |
12318 | note_name, NT_RISCV_CSR, csrs, size); | |
12319 | } | |
12320 | ||
12321 | /* Write the target description (a string) pointed to by TDESC, length | |
12322 | SIZE, into the note buffer BUF, and update *BUFSIZ. ABFD is the bfd the | |
12323 | note is being written into. Return a pointer to the new start of the | |
12324 | note buffer, to replace BUF which may no longer be valid. */ | |
12325 | ||
12326 | char * | |
12327 | elfcore_write_gdb_tdesc (bfd *abfd, | |
12328 | char *buf, | |
12329 | int *bufsiz, | |
12330 | const void *tdesc, | |
12331 | int size) | |
12332 | { | |
12333 | const char *note_name = "GDB"; | |
12334 | return elfcore_write_note (abfd, buf, bufsiz, | |
12335 | note_name, NT_GDB_TDESC, tdesc, size); | |
12336 | } | |
12337 | ||
12338 | char * | |
12339 | elfcore_write_register_note (bfd *abfd, | |
12340 | char *buf, | |
12341 | int *bufsiz, | |
12342 | const char *section, | |
12343 | const void *data, | |
12344 | int size) | |
12345 | { | |
12346 | if (strcmp (section, ".reg2") == 0) | |
12347 | return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size); | |
12348 | if (strcmp (section, ".reg-xfp") == 0) | |
12349 | return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size); | |
12350 | if (strcmp (section, ".reg-xstate") == 0) | |
12351 | return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size); | |
12352 | if (strcmp (section, ".reg-ppc-vmx") == 0) | |
12353 | return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size); | |
12354 | if (strcmp (section, ".reg-ppc-vsx") == 0) | |
12355 | return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size); | |
12356 | if (strcmp (section, ".reg-ppc-tar") == 0) | |
12357 | return elfcore_write_ppc_tar (abfd, buf, bufsiz, data, size); | |
12358 | if (strcmp (section, ".reg-ppc-ppr") == 0) | |
12359 | return elfcore_write_ppc_ppr (abfd, buf, bufsiz, data, size); | |
12360 | if (strcmp (section, ".reg-ppc-dscr") == 0) | |
12361 | return elfcore_write_ppc_dscr (abfd, buf, bufsiz, data, size); | |
12362 | if (strcmp (section, ".reg-ppc-ebb") == 0) | |
12363 | return elfcore_write_ppc_ebb (abfd, buf, bufsiz, data, size); | |
12364 | if (strcmp (section, ".reg-ppc-pmu") == 0) | |
12365 | return elfcore_write_ppc_pmu (abfd, buf, bufsiz, data, size); | |
12366 | if (strcmp (section, ".reg-ppc-tm-cgpr") == 0) | |
12367 | return elfcore_write_ppc_tm_cgpr (abfd, buf, bufsiz, data, size); | |
12368 | if (strcmp (section, ".reg-ppc-tm-cfpr") == 0) | |
12369 | return elfcore_write_ppc_tm_cfpr (abfd, buf, bufsiz, data, size); | |
12370 | if (strcmp (section, ".reg-ppc-tm-cvmx") == 0) | |
12371 | return elfcore_write_ppc_tm_cvmx (abfd, buf, bufsiz, data, size); | |
12372 | if (strcmp (section, ".reg-ppc-tm-cvsx") == 0) | |
12373 | return elfcore_write_ppc_tm_cvsx (abfd, buf, bufsiz, data, size); | |
12374 | if (strcmp (section, ".reg-ppc-tm-spr") == 0) | |
12375 | return elfcore_write_ppc_tm_spr (abfd, buf, bufsiz, data, size); | |
12376 | if (strcmp (section, ".reg-ppc-tm-ctar") == 0) | |
12377 | return elfcore_write_ppc_tm_ctar (abfd, buf, bufsiz, data, size); | |
12378 | if (strcmp (section, ".reg-ppc-tm-cppr") == 0) | |
12379 | return elfcore_write_ppc_tm_cppr (abfd, buf, bufsiz, data, size); | |
12380 | if (strcmp (section, ".reg-ppc-tm-cdscr") == 0) | |
12381 | return elfcore_write_ppc_tm_cdscr (abfd, buf, bufsiz, data, size); | |
12382 | if (strcmp (section, ".reg-s390-high-gprs") == 0) | |
12383 | return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size); | |
12384 | if (strcmp (section, ".reg-s390-timer") == 0) | |
12385 | return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size); | |
12386 | if (strcmp (section, ".reg-s390-todcmp") == 0) | |
12387 | return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size); | |
12388 | if (strcmp (section, ".reg-s390-todpreg") == 0) | |
12389 | return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size); | |
12390 | if (strcmp (section, ".reg-s390-ctrs") == 0) | |
12391 | return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size); | |
12392 | if (strcmp (section, ".reg-s390-prefix") == 0) | |
12393 | return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size); | |
12394 | if (strcmp (section, ".reg-s390-last-break") == 0) | |
12395 | return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size); | |
12396 | if (strcmp (section, ".reg-s390-system-call") == 0) | |
12397 | return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size); | |
12398 | if (strcmp (section, ".reg-s390-tdb") == 0) | |
12399 | return elfcore_write_s390_tdb (abfd, buf, bufsiz, data, size); | |
12400 | if (strcmp (section, ".reg-s390-vxrs-low") == 0) | |
12401 | return elfcore_write_s390_vxrs_low (abfd, buf, bufsiz, data, size); | |
12402 | if (strcmp (section, ".reg-s390-vxrs-high") == 0) | |
12403 | return elfcore_write_s390_vxrs_high (abfd, buf, bufsiz, data, size); | |
12404 | if (strcmp (section, ".reg-s390-gs-cb") == 0) | |
12405 | return elfcore_write_s390_gs_cb (abfd, buf, bufsiz, data, size); | |
12406 | if (strcmp (section, ".reg-s390-gs-bc") == 0) | |
12407 | return elfcore_write_s390_gs_bc (abfd, buf, bufsiz, data, size); | |
12408 | if (strcmp (section, ".reg-arm-vfp") == 0) | |
12409 | return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size); | |
12410 | if (strcmp (section, ".reg-aarch-tls") == 0) | |
12411 | return elfcore_write_aarch_tls (abfd, buf, bufsiz, data, size); | |
12412 | if (strcmp (section, ".reg-aarch-hw-break") == 0) | |
12413 | return elfcore_write_aarch_hw_break (abfd, buf, bufsiz, data, size); | |
12414 | if (strcmp (section, ".reg-aarch-hw-watch") == 0) | |
12415 | return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size); | |
12416 | if (strcmp (section, ".reg-aarch-sve") == 0) | |
12417 | return elfcore_write_aarch_sve (abfd, buf, bufsiz, data, size); | |
12418 | if (strcmp (section, ".reg-aarch-pauth") == 0) | |
12419 | return elfcore_write_aarch_pauth (abfd, buf, bufsiz, data, size); | |
12420 | if (strcmp (section, ".reg-aarch-mte") == 0) | |
12421 | return elfcore_write_aarch_mte (abfd, buf, bufsiz, data, size); | |
12422 | if (strcmp (section, ".reg-arc-v2") == 0) | |
12423 | return elfcore_write_arc_v2 (abfd, buf, bufsiz, data, size); | |
12424 | if (strcmp (section, ".gdb-tdesc") == 0) | |
12425 | return elfcore_write_gdb_tdesc (abfd, buf, bufsiz, data, size); | |
12426 | if (strcmp (section, ".reg-riscv-csr") == 0) | |
12427 | return elfcore_write_riscv_csr (abfd, buf, bufsiz, data, size); | |
12428 | if (strcmp (section, ".reg-loongarch-cpucfg") == 0) | |
12429 | return elfcore_write_loongarch_cpucfg (abfd, buf, bufsiz, data, size); | |
12430 | if (strcmp (section, ".reg-loongarch-lbt") == 0) | |
12431 | return elfcore_write_loongarch_lbt (abfd, buf, bufsiz, data, size); | |
12432 | if (strcmp (section, ".reg-loongarch-lsx") == 0) | |
12433 | return elfcore_write_loongarch_lsx (abfd, buf, bufsiz, data, size); | |
12434 | if (strcmp (section, ".reg-loongarch-lasx") == 0) | |
12435 | return elfcore_write_loongarch_lasx (abfd, buf, bufsiz, data, size); | |
12436 | return NULL; | |
12437 | } | |
12438 | ||
12439 | char * | |
12440 | elfcore_write_file_note (bfd *obfd, char *note_data, int *note_size, | |
12441 | const void *buf, int bufsiz) | |
12442 | { | |
12443 | return elfcore_write_note (obfd, note_data, note_size, | |
12444 | "CORE", NT_FILE, buf, bufsiz); | |
12445 | } | |
12446 | ||
12447 | static bool | |
12448 | elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset, | |
12449 | size_t align) | |
12450 | { | |
12451 | char *p; | |
12452 | ||
12453 | /* NB: CORE PT_NOTE segments may have p_align values of 0 or 1. | |
12454 | gABI specifies that PT_NOTE alignment should be aligned to 4 | |
12455 | bytes for 32-bit objects and to 8 bytes for 64-bit objects. If | |
12456 | align is less than 4, we use 4 byte alignment. */ | |
12457 | if (align < 4) | |
12458 | align = 4; | |
12459 | if (align != 4 && align != 8) | |
12460 | return false; | |
12461 | ||
12462 | p = buf; | |
12463 | while (p < buf + size) | |
12464 | { | |
12465 | Elf_External_Note *xnp = (Elf_External_Note *) p; | |
12466 | Elf_Internal_Note in; | |
12467 | ||
12468 | if (offsetof (Elf_External_Note, name) > buf - p + size) | |
12469 | return false; | |
12470 | ||
12471 | in.type = H_GET_32 (abfd, xnp->type); | |
12472 | ||
12473 | in.namesz = H_GET_32 (abfd, xnp->namesz); | |
12474 | in.namedata = xnp->name; | |
12475 | if (in.namesz > buf - in.namedata + size) | |
12476 | return false; | |
12477 | ||
12478 | in.descsz = H_GET_32 (abfd, xnp->descsz); | |
12479 | in.descdata = p + ELF_NOTE_DESC_OFFSET (in.namesz, align); | |
12480 | in.descpos = offset + (in.descdata - buf); | |
12481 | if (in.descsz != 0 | |
12482 | && (in.descdata >= buf + size | |
12483 | || in.descsz > buf - in.descdata + size)) | |
12484 | return false; | |
12485 | ||
12486 | switch (bfd_get_format (abfd)) | |
12487 | { | |
12488 | default: | |
12489 | return true; | |
12490 | ||
12491 | case bfd_core: | |
12492 | { | |
12493 | #define GROKER_ELEMENT(S,F) {S, sizeof (S) - 1, F} | |
12494 | struct | |
12495 | { | |
12496 | const char * string; | |
12497 | size_t len; | |
12498 | bool (*func) (bfd *, Elf_Internal_Note *); | |
12499 | } | |
12500 | grokers[] = | |
12501 | { | |
12502 | GROKER_ELEMENT ("", elfcore_grok_note), | |
12503 | GROKER_ELEMENT ("FreeBSD", elfcore_grok_freebsd_note), | |
12504 | GROKER_ELEMENT ("NetBSD-CORE", elfcore_grok_netbsd_note), | |
12505 | GROKER_ELEMENT ("OpenBSD", elfcore_grok_openbsd_note), | |
12506 | GROKER_ELEMENT ("QNX", elfcore_grok_nto_note), | |
12507 | GROKER_ELEMENT ("SPU/", elfcore_grok_spu_note), | |
12508 | GROKER_ELEMENT ("GNU", elfobj_grok_gnu_note), | |
12509 | GROKER_ELEMENT ("CORE", elfcore_grok_solaris_note) | |
12510 | }; | |
12511 | #undef GROKER_ELEMENT | |
12512 | int i; | |
12513 | ||
12514 | for (i = ARRAY_SIZE (grokers); i--;) | |
12515 | { | |
12516 | if (in.namesz >= grokers[i].len | |
12517 | && strncmp (in.namedata, grokers[i].string, | |
12518 | grokers[i].len) == 0) | |
12519 | { | |
12520 | if (! grokers[i].func (abfd, & in)) | |
12521 | return false; | |
12522 | break; | |
12523 | } | |
12524 | } | |
12525 | break; | |
12526 | } | |
12527 | ||
12528 | case bfd_object: | |
12529 | if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0) | |
12530 | { | |
12531 | if (! elfobj_grok_gnu_note (abfd, &in)) | |
12532 | return false; | |
12533 | } | |
12534 | else if (in.namesz == sizeof "stapsdt" | |
12535 | && strcmp (in.namedata, "stapsdt") == 0) | |
12536 | { | |
12537 | if (! elfobj_grok_stapsdt_note (abfd, &in)) | |
12538 | return false; | |
12539 | } | |
12540 | break; | |
12541 | } | |
12542 | ||
12543 | p += ELF_NOTE_NEXT_OFFSET (in.namesz, in.descsz, align); | |
12544 | } | |
12545 | ||
12546 | return true; | |
12547 | } | |
12548 | ||
12549 | bool | |
12550 | elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size, | |
12551 | size_t align) | |
12552 | { | |
12553 | char *buf; | |
12554 | ||
12555 | if (size == 0 || (size + 1) == 0) | |
12556 | return true; | |
12557 | ||
12558 | if (bfd_seek (abfd, offset, SEEK_SET) != 0) | |
12559 | return false; | |
12560 | ||
12561 | buf = (char *) _bfd_malloc_and_read (abfd, size + 1, size); | |
12562 | if (buf == NULL) | |
12563 | return false; | |
12564 | ||
12565 | /* PR 17512: file: ec08f814 | |
12566 | 0-termintate the buffer so that string searches will not overflow. */ | |
12567 | buf[size] = 0; | |
12568 | ||
12569 | if (!elf_parse_notes (abfd, buf, size, offset, align)) | |
12570 | { | |
12571 | free (buf); | |
12572 | return false; | |
12573 | } | |
12574 | ||
12575 | free (buf); | |
12576 | return true; | |
12577 | } | |
12578 | \f | |
12579 | /* Providing external access to the ELF program header table. */ | |
12580 | ||
12581 | /* Return an upper bound on the number of bytes required to store a | |
12582 | copy of ABFD's program header table entries. Return -1 if an error | |
12583 | occurs; bfd_get_error will return an appropriate code. */ | |
12584 | ||
12585 | long | |
12586 | bfd_get_elf_phdr_upper_bound (bfd *abfd) | |
12587 | { | |
12588 | if (abfd->xvec->flavour != bfd_target_elf_flavour) | |
12589 | { | |
12590 | bfd_set_error (bfd_error_wrong_format); | |
12591 | return -1; | |
12592 | } | |
12593 | ||
12594 | return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr); | |
12595 | } | |
12596 | ||
12597 | /* Copy ABFD's program header table entries to *PHDRS. The entries | |
12598 | will be stored as an array of Elf_Internal_Phdr structures, as | |
12599 | defined in include/elf/internal.h. To find out how large the | |
12600 | buffer needs to be, call bfd_get_elf_phdr_upper_bound. | |
12601 | ||
12602 | Return the number of program header table entries read, or -1 if an | |
12603 | error occurs; bfd_get_error will return an appropriate code. */ | |
12604 | ||
12605 | int | |
12606 | bfd_get_elf_phdrs (bfd *abfd, void *phdrs) | |
12607 | { | |
12608 | int num_phdrs; | |
12609 | ||
12610 | if (abfd->xvec->flavour != bfd_target_elf_flavour) | |
12611 | { | |
12612 | bfd_set_error (bfd_error_wrong_format); | |
12613 | return -1; | |
12614 | } | |
12615 | ||
12616 | num_phdrs = elf_elfheader (abfd)->e_phnum; | |
12617 | if (num_phdrs != 0) | |
12618 | memcpy (phdrs, elf_tdata (abfd)->phdr, | |
12619 | num_phdrs * sizeof (Elf_Internal_Phdr)); | |
12620 | ||
12621 | return num_phdrs; | |
12622 | } | |
12623 | ||
12624 | enum elf_reloc_type_class | |
12625 | _bfd_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
12626 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
12627 | const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED) | |
12628 | { | |
12629 | return reloc_class_normal; | |
12630 | } | |
12631 | ||
12632 | /* For RELA architectures, return the relocation value for a | |
12633 | relocation against a local symbol. */ | |
12634 | ||
12635 | bfd_vma | |
12636 | _bfd_elf_rela_local_sym (bfd *abfd, | |
12637 | Elf_Internal_Sym *sym, | |
12638 | asection **psec, | |
12639 | Elf_Internal_Rela *rel) | |
12640 | { | |
12641 | asection *sec = *psec; | |
12642 | bfd_vma relocation; | |
12643 | ||
12644 | relocation = (sec->output_section->vma | |
12645 | + sec->output_offset | |
12646 | + sym->st_value); | |
12647 | if ((sec->flags & SEC_MERGE) | |
12648 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
12649 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
12650 | { | |
12651 | rel->r_addend = | |
12652 | _bfd_merged_section_offset (abfd, psec, | |
12653 | elf_section_data (sec)->sec_info, | |
12654 | sym->st_value + rel->r_addend); | |
12655 | if (sec != *psec) | |
12656 | { | |
12657 | /* If we have changed the section, and our original section is | |
12658 | marked with SEC_EXCLUDE, it means that the original | |
12659 | SEC_MERGE section has been completely subsumed in some | |
12660 | other SEC_MERGE section. In this case, we need to leave | |
12661 | some info around for --emit-relocs. */ | |
12662 | if ((sec->flags & SEC_EXCLUDE) != 0) | |
12663 | sec->kept_section = *psec; | |
12664 | sec = *psec; | |
12665 | } | |
12666 | rel->r_addend -= relocation; | |
12667 | rel->r_addend += sec->output_section->vma + sec->output_offset; | |
12668 | } | |
12669 | return relocation; | |
12670 | } | |
12671 | ||
12672 | bfd_vma | |
12673 | _bfd_elf_rel_local_sym (bfd *abfd, | |
12674 | Elf_Internal_Sym *sym, | |
12675 | asection **psec, | |
12676 | bfd_vma addend) | |
12677 | { | |
12678 | asection *sec = *psec; | |
12679 | ||
12680 | if (sec->sec_info_type != SEC_INFO_TYPE_MERGE) | |
12681 | return sym->st_value + addend; | |
12682 | ||
12683 | return _bfd_merged_section_offset (abfd, psec, | |
12684 | elf_section_data (sec)->sec_info, | |
12685 | sym->st_value + addend); | |
12686 | } | |
12687 | ||
12688 | /* Adjust an address within a section. Given OFFSET within SEC, return | |
12689 | the new offset within the section, based upon changes made to the | |
12690 | section. Returns -1 if the offset is now invalid. | |
12691 | The offset (in abnd out) is in target sized bytes, however big a | |
12692 | byte may be. */ | |
12693 | ||
12694 | bfd_vma | |
12695 | _bfd_elf_section_offset (bfd *abfd, | |
12696 | struct bfd_link_info *info, | |
12697 | asection *sec, | |
12698 | bfd_vma offset) | |
12699 | { | |
12700 | switch (sec->sec_info_type) | |
12701 | { | |
12702 | case SEC_INFO_TYPE_STABS: | |
12703 | return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info, | |
12704 | offset); | |
12705 | case SEC_INFO_TYPE_EH_FRAME: | |
12706 | return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset); | |
12707 | ||
12708 | default: | |
12709 | if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0) | |
12710 | { | |
12711 | /* Reverse the offset. */ | |
12712 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12713 | bfd_size_type address_size = bed->s->arch_size / 8; | |
12714 | ||
12715 | /* address_size and sec->size are in octets. Convert | |
12716 | to bytes before subtracting the original offset. */ | |
12717 | offset = ((sec->size - address_size) | |
12718 | / bfd_octets_per_byte (abfd, sec) - offset); | |
12719 | } | |
12720 | return offset; | |
12721 | } | |
12722 | } | |
12723 | \f | |
12724 | /* Create a new BFD as if by bfd_openr. Rather than opening a file, | |
12725 | reconstruct an ELF file by reading the segments out of remote memory | |
12726 | based on the ELF file header at EHDR_VMA and the ELF program headers it | |
12727 | points to. If not null, *LOADBASEP is filled in with the difference | |
12728 | between the VMAs from which the segments were read, and the VMAs the | |
12729 | file headers (and hence BFD's idea of each section's VMA) put them at. | |
12730 | ||
12731 | The function TARGET_READ_MEMORY is called to copy LEN bytes from the | |
12732 | remote memory at target address VMA into the local buffer at MYADDR; it | |
12733 | should return zero on success or an `errno' code on failure. TEMPL must | |
12734 | be a BFD for an ELF target with the word size and byte order found in | |
12735 | the remote memory. */ | |
12736 | ||
12737 | bfd * | |
12738 | bfd_elf_bfd_from_remote_memory | |
12739 | (bfd *templ, | |
12740 | bfd_vma ehdr_vma, | |
12741 | bfd_size_type size, | |
12742 | bfd_vma *loadbasep, | |
12743 | int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)) | |
12744 | { | |
12745 | return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory) | |
12746 | (templ, ehdr_vma, size, loadbasep, target_read_memory); | |
12747 | } | |
12748 | \f | |
12749 | long | |
12750 | _bfd_elf_get_synthetic_symtab (bfd *abfd, | |
12751 | long symcount ATTRIBUTE_UNUSED, | |
12752 | asymbol **syms ATTRIBUTE_UNUSED, | |
12753 | long dynsymcount, | |
12754 | asymbol **dynsyms, | |
12755 | asymbol **ret) | |
12756 | { | |
12757 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12758 | asection *relplt; | |
12759 | asymbol *s; | |
12760 | const char *relplt_name; | |
12761 | bool (*slurp_relocs) (bfd *, asection *, asymbol **, bool); | |
12762 | arelent *p; | |
12763 | long count, i, n; | |
12764 | size_t size; | |
12765 | Elf_Internal_Shdr *hdr; | |
12766 | char *names; | |
12767 | asection *plt; | |
12768 | ||
12769 | *ret = NULL; | |
12770 | ||
12771 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) | |
12772 | return 0; | |
12773 | ||
12774 | if (dynsymcount <= 0) | |
12775 | return 0; | |
12776 | ||
12777 | if (!bed->plt_sym_val) | |
12778 | return 0; | |
12779 | ||
12780 | relplt_name = bed->relplt_name; | |
12781 | if (relplt_name == NULL) | |
12782 | relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt"; | |
12783 | relplt = bfd_get_section_by_name (abfd, relplt_name); | |
12784 | if (relplt == NULL) | |
12785 | return 0; | |
12786 | ||
12787 | hdr = &elf_section_data (relplt)->this_hdr; | |
12788 | if (hdr->sh_link != elf_dynsymtab (abfd) | |
12789 | || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA)) | |
12790 | return 0; | |
12791 | ||
12792 | plt = bfd_get_section_by_name (abfd, ".plt"); | |
12793 | if (plt == NULL) | |
12794 | return 0; | |
12795 | ||
12796 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; | |
12797 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, true)) | |
12798 | return -1; | |
12799 | ||
12800 | count = relplt->size / hdr->sh_entsize; | |
12801 | size = count * sizeof (asymbol); | |
12802 | p = relplt->relocation; | |
12803 | for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel) | |
12804 | { | |
12805 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
12806 | if (p->addend != 0) | |
12807 | { | |
12808 | #ifdef BFD64 | |
12809 | size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64); | |
12810 | #else | |
12811 | size += sizeof ("+0x") - 1 + 8; | |
12812 | #endif | |
12813 | } | |
12814 | } | |
12815 | ||
12816 | s = *ret = (asymbol *) bfd_malloc (size); | |
12817 | if (s == NULL) | |
12818 | return -1; | |
12819 | ||
12820 | names = (char *) (s + count); | |
12821 | p = relplt->relocation; | |
12822 | n = 0; | |
12823 | for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel) | |
12824 | { | |
12825 | size_t len; | |
12826 | bfd_vma addr; | |
12827 | ||
12828 | addr = bed->plt_sym_val (i, plt, p); | |
12829 | if (addr == (bfd_vma) -1) | |
12830 | continue; | |
12831 | ||
12832 | *s = **p->sym_ptr_ptr; | |
12833 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since | |
12834 | we are defining a symbol, ensure one of them is set. */ | |
12835 | if ((s->flags & BSF_LOCAL) == 0) | |
12836 | s->flags |= BSF_GLOBAL; | |
12837 | s->flags |= BSF_SYNTHETIC; | |
12838 | s->section = plt; | |
12839 | s->value = addr - plt->vma; | |
12840 | s->name = names; | |
12841 | s->udata.p = NULL; | |
12842 | len = strlen ((*p->sym_ptr_ptr)->name); | |
12843 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
12844 | names += len; | |
12845 | if (p->addend != 0) | |
12846 | { | |
12847 | char buf[30], *a; | |
12848 | ||
12849 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
12850 | names += sizeof ("+0x") - 1; | |
12851 | bfd_sprintf_vma (abfd, buf, p->addend); | |
12852 | for (a = buf; *a == '0'; ++a) | |
12853 | ; | |
12854 | len = strlen (a); | |
12855 | memcpy (names, a, len); | |
12856 | names += len; | |
12857 | } | |
12858 | memcpy (names, "@plt", sizeof ("@plt")); | |
12859 | names += sizeof ("@plt"); | |
12860 | ++s, ++n; | |
12861 | } | |
12862 | ||
12863 | return n; | |
12864 | } | |
12865 | ||
12866 | /* It is only used by x86-64 so far. | |
12867 | ??? This repeats *COM* id of zero. sec->id is supposed to be unique, | |
12868 | but current usage would allow all of _bfd_std_section to be zero. */ | |
12869 | static const asymbol lcomm_sym | |
12870 | = GLOBAL_SYM_INIT ("LARGE_COMMON", &_bfd_elf_large_com_section); | |
12871 | asection _bfd_elf_large_com_section | |
12872 | = BFD_FAKE_SECTION (_bfd_elf_large_com_section, &lcomm_sym, | |
12873 | "LARGE_COMMON", 0, SEC_IS_COMMON); | |
12874 | ||
12875 | bool | |
12876 | _bfd_elf_final_write_processing (bfd *abfd) | |
12877 | { | |
12878 | Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */ | |
12879 | ||
12880 | i_ehdrp = elf_elfheader (abfd); | |
12881 | ||
12882 | if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE) | |
12883 | i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; | |
12884 | ||
12885 | /* Set the osabi field to ELFOSABI_GNU if the binary contains | |
12886 | SHF_GNU_MBIND or SHF_GNU_RETAIN sections or symbols of STT_GNU_IFUNC type | |
12887 | or STB_GNU_UNIQUE binding. */ | |
12888 | if (elf_tdata (abfd)->has_gnu_osabi != 0) | |
12889 | { | |
12890 | if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE) | |
12891 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU; | |
12892 | else if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_GNU | |
12893 | && i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_FREEBSD) | |
12894 | { | |
12895 | if (elf_tdata (abfd)->has_gnu_osabi & elf_gnu_osabi_mbind) | |
12896 | _bfd_error_handler (_("GNU_MBIND section is supported only by GNU " | |
12897 | "and FreeBSD targets")); | |
12898 | if (elf_tdata (abfd)->has_gnu_osabi & elf_gnu_osabi_ifunc) | |
12899 | _bfd_error_handler (_("symbol type STT_GNU_IFUNC is supported " | |
12900 | "only by GNU and FreeBSD targets")); | |
12901 | if (elf_tdata (abfd)->has_gnu_osabi & elf_gnu_osabi_unique) | |
12902 | _bfd_error_handler (_("symbol binding STB_GNU_UNIQUE is supported " | |
12903 | "only by GNU and FreeBSD targets")); | |
12904 | if (elf_tdata (abfd)->has_gnu_osabi & elf_gnu_osabi_retain) | |
12905 | _bfd_error_handler (_("GNU_RETAIN section is supported " | |
12906 | "only by GNU and FreeBSD targets")); | |
12907 | bfd_set_error (bfd_error_sorry); | |
12908 | return false; | |
12909 | } | |
12910 | } | |
12911 | return true; | |
12912 | } | |
12913 | ||
12914 | ||
12915 | /* Return TRUE for ELF symbol types that represent functions. | |
12916 | This is the default version of this function, which is sufficient for | |
12917 | most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */ | |
12918 | ||
12919 | bool | |
12920 | _bfd_elf_is_function_type (unsigned int type) | |
12921 | { | |
12922 | return (type == STT_FUNC | |
12923 | || type == STT_GNU_IFUNC); | |
12924 | } | |
12925 | ||
12926 | /* If the ELF symbol SYM might be a function in SEC, return the | |
12927 | function size and set *CODE_OFF to the function's entry point, | |
12928 | otherwise return zero. */ | |
12929 | ||
12930 | bfd_size_type | |
12931 | _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec, | |
12932 | bfd_vma *code_off) | |
12933 | { | |
12934 | bfd_size_type size; | |
12935 | elf_symbol_type * elf_sym = (elf_symbol_type *) sym; | |
12936 | ||
12937 | if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT | |
12938 | | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0 | |
12939 | || sym->section != sec) | |
12940 | return 0; | |
12941 | ||
12942 | size = (sym->flags & BSF_SYNTHETIC) ? 0 : elf_sym->internal_elf_sym.st_size; | |
12943 | ||
12944 | /* In theory we should check that the symbol's type satisfies | |
12945 | _bfd_elf_is_function_type(), but there are some function-like | |
12946 | symbols which would fail this test. (eg _start). Instead | |
12947 | we check for hidden, local, notype symbols with zero size. | |
12948 | This type of symbol is generated by the annobin plugin for gcc | |
12949 | and clang, and should not be considered to be a function symbol. */ | |
12950 | if (size == 0 | |
12951 | && ((sym->flags & (BSF_SYNTHETIC | BSF_LOCAL)) == BSF_LOCAL) | |
12952 | && ELF_ST_TYPE (elf_sym->internal_elf_sym.st_info) == STT_NOTYPE | |
12953 | && ELF_ST_VISIBILITY (elf_sym->internal_elf_sym.st_other) == STV_HIDDEN) | |
12954 | return 0; | |
12955 | ||
12956 | *code_off = sym->value; | |
12957 | /* Do not return 0 for the function's size. */ | |
12958 | return size ? size : 1; | |
12959 | } | |
12960 | ||
12961 | /* Set to non-zero to enable some debug messages. */ | |
12962 | #define DEBUG_SECONDARY_RELOCS 0 | |
12963 | ||
12964 | /* An internal-to-the-bfd-library only section type | |
12965 | used to indicate a cached secondary reloc section. */ | |
12966 | #define SHT_SECONDARY_RELOC (SHT_LOOS + SHT_RELA) | |
12967 | ||
12968 | /* Create a BFD section to hold a secondary reloc section. */ | |
12969 | ||
12970 | bool | |
12971 | _bfd_elf_init_secondary_reloc_section (bfd * abfd, | |
12972 | Elf_Internal_Shdr *hdr, | |
12973 | const char * name, | |
12974 | unsigned int shindex) | |
12975 | { | |
12976 | /* We only support RELA secondary relocs. */ | |
12977 | if (hdr->sh_type != SHT_RELA) | |
12978 | return false; | |
12979 | ||
12980 | #if DEBUG_SECONDARY_RELOCS | |
12981 | fprintf (stderr, "secondary reloc section %s encountered\n", name); | |
12982 | #endif | |
12983 | hdr->sh_type = SHT_SECONDARY_RELOC; | |
12984 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
12985 | } | |
12986 | ||
12987 | /* Read in any secondary relocs associated with SEC. */ | |
12988 | ||
12989 | bool | |
12990 | _bfd_elf_slurp_secondary_reloc_section (bfd * abfd, | |
12991 | asection * sec, | |
12992 | asymbol ** symbols, | |
12993 | bool dynamic) | |
12994 | { | |
12995 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); | |
12996 | asection * relsec; | |
12997 | bool result = true; | |
12998 | bfd_vma (*r_sym) (bfd_vma); | |
12999 | ||
13000 | #if BFD_DEFAULT_TARGET_SIZE > 32 | |
13001 | if (bfd_arch_bits_per_address (abfd) != 32) | |
13002 | r_sym = elf64_r_sym; | |
13003 | else | |
13004 | #endif | |
13005 | r_sym = elf32_r_sym; | |
13006 | ||
13007 | if (!elf_section_data (sec)->has_secondary_relocs) | |
13008 | return true; | |
13009 | ||
13010 | /* Discover if there are any secondary reloc sections | |
13011 | associated with SEC. */ | |
13012 | for (relsec = abfd->sections; relsec != NULL; relsec = relsec->next) | |
13013 | { | |
13014 | Elf_Internal_Shdr * hdr = & elf_section_data (relsec)->this_hdr; | |
13015 | ||
13016 | if (hdr->sh_type == SHT_SECONDARY_RELOC | |
13017 | && hdr->sh_info == (unsigned) elf_section_data (sec)->this_idx | |
13018 | && (hdr->sh_entsize == ebd->s->sizeof_rel | |
13019 | || hdr->sh_entsize == ebd->s->sizeof_rela)) | |
13020 | { | |
13021 | bfd_byte * native_relocs; | |
13022 | bfd_byte * native_reloc; | |
13023 | arelent * internal_relocs; | |
13024 | arelent * internal_reloc; | |
13025 | unsigned int i; | |
13026 | unsigned int entsize; | |
13027 | unsigned int symcount; | |
13028 | unsigned int reloc_count; | |
13029 | size_t amt; | |
13030 | ||
13031 | if (ebd->elf_info_to_howto == NULL) | |
13032 | return false; | |
13033 | ||
13034 | #if DEBUG_SECONDARY_RELOCS | |
13035 | fprintf (stderr, "read secondary relocs for %s from %s\n", | |
13036 | sec->name, relsec->name); | |
13037 | #endif | |
13038 | entsize = hdr->sh_entsize; | |
13039 | ||
13040 | native_relocs = bfd_malloc (hdr->sh_size); | |
13041 | if (native_relocs == NULL) | |
13042 | { | |
13043 | result = false; | |
13044 | continue; | |
13045 | } | |
13046 | ||
13047 | reloc_count = NUM_SHDR_ENTRIES (hdr); | |
13048 | if (_bfd_mul_overflow (reloc_count, sizeof (arelent), & amt)) | |
13049 | { | |
13050 | free (native_relocs); | |
13051 | bfd_set_error (bfd_error_file_too_big); | |
13052 | result = false; | |
13053 | continue; | |
13054 | } | |
13055 | ||
13056 | internal_relocs = (arelent *) bfd_alloc (abfd, amt); | |
13057 | if (internal_relocs == NULL) | |
13058 | { | |
13059 | free (native_relocs); | |
13060 | result = false; | |
13061 | continue; | |
13062 | } | |
13063 | ||
13064 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 | |
13065 | || (bfd_bread (native_relocs, hdr->sh_size, abfd) | |
13066 | != hdr->sh_size)) | |
13067 | { | |
13068 | free (native_relocs); | |
13069 | /* The internal_relocs will be freed when | |
13070 | the memory for the bfd is released. */ | |
13071 | result = false; | |
13072 | continue; | |
13073 | } | |
13074 | ||
13075 | if (dynamic) | |
13076 | symcount = bfd_get_dynamic_symcount (abfd); | |
13077 | else | |
13078 | symcount = bfd_get_symcount (abfd); | |
13079 | ||
13080 | for (i = 0, internal_reloc = internal_relocs, | |
13081 | native_reloc = native_relocs; | |
13082 | i < reloc_count; | |
13083 | i++, internal_reloc++, native_reloc += entsize) | |
13084 | { | |
13085 | bool res; | |
13086 | Elf_Internal_Rela rela; | |
13087 | ||
13088 | if (entsize == ebd->s->sizeof_rel) | |
13089 | ebd->s->swap_reloc_in (abfd, native_reloc, & rela); | |
13090 | else /* entsize == ebd->s->sizeof_rela */ | |
13091 | ebd->s->swap_reloca_in (abfd, native_reloc, & rela); | |
13092 | ||
13093 | /* The address of an ELF reloc is section relative for an object | |
13094 | file, and absolute for an executable file or shared library. | |
13095 | The address of a normal BFD reloc is always section relative, | |
13096 | and the address of a dynamic reloc is absolute.. */ | |
13097 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) | |
13098 | internal_reloc->address = rela.r_offset; | |
13099 | else | |
13100 | internal_reloc->address = rela.r_offset - sec->vma; | |
13101 | ||
13102 | if (r_sym (rela.r_info) == STN_UNDEF) | |
13103 | { | |
13104 | /* FIXME: This and the error case below mean that we | |
13105 | have a symbol on relocs that is not elf_symbol_type. */ | |
13106 | internal_reloc->sym_ptr_ptr = | |
13107 | bfd_abs_section_ptr->symbol_ptr_ptr; | |
13108 | } | |
13109 | else if (r_sym (rela.r_info) > symcount) | |
13110 | { | |
13111 | _bfd_error_handler | |
13112 | /* xgettext:c-format */ | |
13113 | (_("%pB(%pA): relocation %d has invalid symbol index %ld"), | |
13114 | abfd, sec, i, (long) r_sym (rela.r_info)); | |
13115 | bfd_set_error (bfd_error_bad_value); | |
13116 | internal_reloc->sym_ptr_ptr = | |
13117 | bfd_abs_section_ptr->symbol_ptr_ptr; | |
13118 | result = false; | |
13119 | } | |
13120 | else | |
13121 | { | |
13122 | asymbol **ps; | |
13123 | ||
13124 | ps = symbols + r_sym (rela.r_info) - 1; | |
13125 | internal_reloc->sym_ptr_ptr = ps; | |
13126 | /* Make sure that this symbol is not removed by strip. */ | |
13127 | (*ps)->flags |= BSF_KEEP; | |
13128 | } | |
13129 | ||
13130 | internal_reloc->addend = rela.r_addend; | |
13131 | ||
13132 | res = ebd->elf_info_to_howto (abfd, internal_reloc, & rela); | |
13133 | if (! res || internal_reloc->howto == NULL) | |
13134 | { | |
13135 | #if DEBUG_SECONDARY_RELOCS | |
13136 | fprintf (stderr, "there is no howto associated with reloc %lx\n", | |
13137 | rela.r_info); | |
13138 | #endif | |
13139 | result = false; | |
13140 | } | |
13141 | } | |
13142 | ||
13143 | free (native_relocs); | |
13144 | /* Store the internal relocs. */ | |
13145 | elf_section_data (relsec)->sec_info = internal_relocs; | |
13146 | } | |
13147 | } | |
13148 | ||
13149 | return result; | |
13150 | } | |
13151 | ||
13152 | /* Set the ELF section header fields of an output secondary reloc section. */ | |
13153 | ||
13154 | bool | |
13155 | _bfd_elf_copy_special_section_fields (const bfd * ibfd ATTRIBUTE_UNUSED, | |
13156 | bfd * obfd ATTRIBUTE_UNUSED, | |
13157 | const Elf_Internal_Shdr * isection, | |
13158 | Elf_Internal_Shdr * osection) | |
13159 | { | |
13160 | asection * isec; | |
13161 | asection * osec; | |
13162 | struct bfd_elf_section_data * esd; | |
13163 | ||
13164 | if (isection == NULL) | |
13165 | return false; | |
13166 | ||
13167 | if (isection->sh_type != SHT_SECONDARY_RELOC) | |
13168 | return true; | |
13169 | ||
13170 | isec = isection->bfd_section; | |
13171 | if (isec == NULL) | |
13172 | return false; | |
13173 | ||
13174 | osec = osection->bfd_section; | |
13175 | if (osec == NULL) | |
13176 | return false; | |
13177 | ||
13178 | esd = elf_section_data (osec); | |
13179 | BFD_ASSERT (esd->sec_info == NULL); | |
13180 | esd->sec_info = elf_section_data (isec)->sec_info; | |
13181 | osection->sh_type = SHT_RELA; | |
13182 | osection->sh_link = elf_onesymtab (obfd); | |
13183 | if (osection->sh_link == 0) | |
13184 | { | |
13185 | /* There is no symbol table - we are hosed... */ | |
13186 | _bfd_error_handler | |
13187 | /* xgettext:c-format */ | |
13188 | (_("%pB(%pA): link section cannot be set because the output file does not have a symbol table"), | |
13189 | obfd, osec); | |
13190 | bfd_set_error (bfd_error_bad_value); | |
13191 | return false; | |
13192 | } | |
13193 | ||
13194 | /* Find the output section that corresponds to the isection's sh_info link. */ | |
13195 | if (isection->sh_info == 0 | |
13196 | || isection->sh_info >= elf_numsections (ibfd)) | |
13197 | { | |
13198 | _bfd_error_handler | |
13199 | /* xgettext:c-format */ | |
13200 | (_("%pB(%pA): info section index is invalid"), | |
13201 | obfd, osec); | |
13202 | bfd_set_error (bfd_error_bad_value); | |
13203 | return false; | |
13204 | } | |
13205 | ||
13206 | isection = elf_elfsections (ibfd)[isection->sh_info]; | |
13207 | ||
13208 | if (isection == NULL | |
13209 | || isection->bfd_section == NULL | |
13210 | || isection->bfd_section->output_section == NULL) | |
13211 | { | |
13212 | _bfd_error_handler | |
13213 | /* xgettext:c-format */ | |
13214 | (_("%pB(%pA): info section index cannot be set because the section is not in the output"), | |
13215 | obfd, osec); | |
13216 | bfd_set_error (bfd_error_bad_value); | |
13217 | return false; | |
13218 | } | |
13219 | ||
13220 | esd = elf_section_data (isection->bfd_section->output_section); | |
13221 | BFD_ASSERT (esd != NULL); | |
13222 | osection->sh_info = esd->this_idx; | |
13223 | esd->has_secondary_relocs = true; | |
13224 | #if DEBUG_SECONDARY_RELOCS | |
13225 | fprintf (stderr, "update header of %s, sh_link = %u, sh_info = %u\n", | |
13226 | osec->name, osection->sh_link, osection->sh_info); | |
13227 | fprintf (stderr, "mark section %s as having secondary relocs\n", | |
13228 | bfd_section_name (isection->bfd_section->output_section)); | |
13229 | #endif | |
13230 | ||
13231 | return true; | |
13232 | } | |
13233 | ||
13234 | /* Write out a secondary reloc section. | |
13235 | ||
13236 | FIXME: Currently this function can result in a serious performance penalty | |
13237 | for files with secondary relocs and lots of sections. The proper way to | |
13238 | fix this is for _bfd_elf_copy_special_section_fields() to chain secondary | |
13239 | relocs together and then to have this function just walk that chain. */ | |
13240 | ||
13241 | bool | |
13242 | _bfd_elf_write_secondary_reloc_section (bfd *abfd, asection *sec) | |
13243 | { | |
13244 | const struct elf_backend_data * const ebd = get_elf_backend_data (abfd); | |
13245 | bfd_vma addr_offset; | |
13246 | asection * relsec; | |
13247 | bfd_vma (*r_info) (bfd_vma, bfd_vma); | |
13248 | bool result = true; | |
13249 | ||
13250 | if (sec == NULL) | |
13251 | return false; | |
13252 | ||
13253 | #if BFD_DEFAULT_TARGET_SIZE > 32 | |
13254 | if (bfd_arch_bits_per_address (abfd) != 32) | |
13255 | r_info = elf64_r_info; | |
13256 | else | |
13257 | #endif | |
13258 | r_info = elf32_r_info; | |
13259 | ||
13260 | /* The address of an ELF reloc is section relative for an object | |
13261 | file, and absolute for an executable file or shared library. | |
13262 | The address of a BFD reloc is always section relative. */ | |
13263 | addr_offset = 0; | |
13264 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
13265 | addr_offset = sec->vma; | |
13266 | ||
13267 | /* Discover if there are any secondary reloc sections | |
13268 | associated with SEC. */ | |
13269 | for (relsec = abfd->sections; relsec != NULL; relsec = relsec->next) | |
13270 | { | |
13271 | const struct bfd_elf_section_data * const esd = elf_section_data (relsec); | |
13272 | Elf_Internal_Shdr * const hdr = (Elf_Internal_Shdr *) & esd->this_hdr; | |
13273 | ||
13274 | if (hdr->sh_type == SHT_RELA | |
13275 | && hdr->sh_info == (unsigned) elf_section_data (sec)->this_idx) | |
13276 | { | |
13277 | asymbol * last_sym; | |
13278 | int last_sym_idx; | |
13279 | unsigned int reloc_count; | |
13280 | unsigned int idx; | |
13281 | unsigned int entsize; | |
13282 | arelent * src_irel; | |
13283 | bfd_byte * dst_rela; | |
13284 | ||
13285 | if (hdr->contents != NULL) | |
13286 | { | |
13287 | _bfd_error_handler | |
13288 | /* xgettext:c-format */ | |
13289 | (_("%pB(%pA): error: secondary reloc section processed twice"), | |
13290 | abfd, relsec); | |
13291 | bfd_set_error (bfd_error_bad_value); | |
13292 | result = false; | |
13293 | continue; | |
13294 | } | |
13295 | ||
13296 | entsize = hdr->sh_entsize; | |
13297 | if (entsize == 0) | |
13298 | { | |
13299 | _bfd_error_handler | |
13300 | /* xgettext:c-format */ | |
13301 | (_("%pB(%pA): error: secondary reloc section has zero sized entries"), | |
13302 | abfd, relsec); | |
13303 | bfd_set_error (bfd_error_bad_value); | |
13304 | result = false; | |
13305 | continue; | |
13306 | } | |
13307 | else if (entsize != ebd->s->sizeof_rel | |
13308 | && entsize != ebd->s->sizeof_rela) | |
13309 | { | |
13310 | _bfd_error_handler | |
13311 | /* xgettext:c-format */ | |
13312 | (_("%pB(%pA): error: secondary reloc section has non-standard sized entries"), | |
13313 | abfd, relsec); | |
13314 | bfd_set_error (bfd_error_bad_value); | |
13315 | result = false; | |
13316 | continue; | |
13317 | } | |
13318 | ||
13319 | reloc_count = hdr->sh_size / entsize; | |
13320 | if (reloc_count <= 0) | |
13321 | { | |
13322 | _bfd_error_handler | |
13323 | /* xgettext:c-format */ | |
13324 | (_("%pB(%pA): error: secondary reloc section is empty!"), | |
13325 | abfd, relsec); | |
13326 | bfd_set_error (bfd_error_bad_value); | |
13327 | result = false; | |
13328 | continue; | |
13329 | } | |
13330 | ||
13331 | hdr->contents = bfd_alloc (abfd, hdr->sh_size); | |
13332 | if (hdr->contents == NULL) | |
13333 | continue; | |
13334 | ||
13335 | #if DEBUG_SECONDARY_RELOCS | |
13336 | fprintf (stderr, "write %u secondary relocs for %s from %s\n", | |
13337 | reloc_count, sec->name, relsec->name); | |
13338 | #endif | |
13339 | last_sym = NULL; | |
13340 | last_sym_idx = 0; | |
13341 | dst_rela = hdr->contents; | |
13342 | src_irel = (arelent *) esd->sec_info; | |
13343 | if (src_irel == NULL) | |
13344 | { | |
13345 | _bfd_error_handler | |
13346 | /* xgettext:c-format */ | |
13347 | (_("%pB(%pA): error: internal relocs missing for secondary reloc section"), | |
13348 | abfd, relsec); | |
13349 | bfd_set_error (bfd_error_bad_value); | |
13350 | result = false; | |
13351 | continue; | |
13352 | } | |
13353 | ||
13354 | for (idx = 0; idx < reloc_count; idx++, dst_rela += entsize) | |
13355 | { | |
13356 | Elf_Internal_Rela src_rela; | |
13357 | arelent *ptr; | |
13358 | asymbol *sym; | |
13359 | int n; | |
13360 | ||
13361 | ptr = src_irel + idx; | |
13362 | if (ptr == NULL) | |
13363 | { | |
13364 | _bfd_error_handler | |
13365 | /* xgettext:c-format */ | |
13366 | (_("%pB(%pA): error: reloc table entry %u is empty"), | |
13367 | abfd, relsec, idx); | |
13368 | bfd_set_error (bfd_error_bad_value); | |
13369 | result = false; | |
13370 | break; | |
13371 | } | |
13372 | ||
13373 | if (ptr->sym_ptr_ptr == NULL) | |
13374 | { | |
13375 | /* FIXME: Is this an error ? */ | |
13376 | n = 0; | |
13377 | } | |
13378 | else | |
13379 | { | |
13380 | sym = *ptr->sym_ptr_ptr; | |
13381 | ||
13382 | if (sym == last_sym) | |
13383 | n = last_sym_idx; | |
13384 | else | |
13385 | { | |
13386 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, & sym); | |
13387 | if (n < 0) | |
13388 | { | |
13389 | _bfd_error_handler | |
13390 | /* xgettext:c-format */ | |
13391 | (_("%pB(%pA): error: secondary reloc %u references a missing symbol"), | |
13392 | abfd, relsec, idx); | |
13393 | bfd_set_error (bfd_error_bad_value); | |
13394 | result = false; | |
13395 | n = 0; | |
13396 | } | |
13397 | ||
13398 | last_sym = sym; | |
13399 | last_sym_idx = n; | |
13400 | } | |
13401 | ||
13402 | if (sym->the_bfd != NULL | |
13403 | && sym->the_bfd->xvec != abfd->xvec | |
13404 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
13405 | { | |
13406 | _bfd_error_handler | |
13407 | /* xgettext:c-format */ | |
13408 | (_("%pB(%pA): error: secondary reloc %u references a deleted symbol"), | |
13409 | abfd, relsec, idx); | |
13410 | bfd_set_error (bfd_error_bad_value); | |
13411 | result = false; | |
13412 | n = 0; | |
13413 | } | |
13414 | } | |
13415 | ||
13416 | src_rela.r_offset = ptr->address + addr_offset; | |
13417 | if (ptr->howto == NULL) | |
13418 | { | |
13419 | _bfd_error_handler | |
13420 | /* xgettext:c-format */ | |
13421 | (_("%pB(%pA): error: secondary reloc %u is of an unknown type"), | |
13422 | abfd, relsec, idx); | |
13423 | bfd_set_error (bfd_error_bad_value); | |
13424 | result = false; | |
13425 | src_rela.r_info = r_info (0, 0); | |
13426 | } | |
13427 | else | |
13428 | src_rela.r_info = r_info (n, ptr->howto->type); | |
13429 | src_rela.r_addend = ptr->addend; | |
13430 | ||
13431 | if (entsize == ebd->s->sizeof_rel) | |
13432 | ebd->s->swap_reloc_out (abfd, &src_rela, dst_rela); | |
13433 | else /* entsize == ebd->s->sizeof_rela */ | |
13434 | ebd->s->swap_reloca_out (abfd, &src_rela, dst_rela); | |
13435 | } | |
13436 | } | |
13437 | } | |
13438 | ||
13439 | return result; | |
13440 | } |