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252b5132 | 1 | /* opncls.c -- open and close a BFD. |
d87bef3a | 2 | Copyright (C) 1990-2023 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | Written by Cygnus Support. | |
5 | ||
c4f3d130 | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
c4f3d130 NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c4f3d130 | 11 | (at your option) any later version. |
252b5132 | 12 | |
c4f3d130 NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
252b5132 | 17 | |
c4f3d130 NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
21 | MA 02110-1301, USA. */ | |
252b5132 | 22 | |
252b5132 | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
252b5132 RH |
25 | #include "objalloc.h" |
26 | #include "libbfd.h" | |
31f7ba04 | 27 | #include "libiberty.h" |
2425a30e | 28 | #include "elf-bfd.h" |
252b5132 RH |
29 | |
30 | #ifndef S_IXUSR | |
31 | #define S_IXUSR 0100 /* Execute by owner. */ | |
32 | #endif | |
33 | #ifndef S_IXGRP | |
34 | #define S_IXGRP 0010 /* Execute by group. */ | |
35 | #endif | |
36 | #ifndef S_IXOTH | |
37 | #define S_IXOTH 0001 /* Execute by others. */ | |
38 | #endif | |
39 | ||
03a7c6eb TT |
40 | /* |
41 | SECTION | |
42 | Opening and closing BFDs | |
43 | ||
44 | SUBSECTION | |
45 | Functions for opening and closing | |
46 | */ | |
47 | ||
fc1cfaa5 | 48 | /* Counters used to initialize the bfd identifier. */ |
52b69c9e | 49 | |
fc1cfaa5 AM |
50 | static unsigned int bfd_id_counter = 0; |
51 | static unsigned int bfd_reserved_id_counter = 0; | |
52 | ||
53 | /* | |
54 | CODE_FRAGMENT | |
55 | .{* Set to N to open the next N BFDs using an alternate id space. *} | |
56 | .extern unsigned int bfd_use_reserved_id; | |
57 | */ | |
58 | unsigned int bfd_use_reserved_id = 0; | |
52b69c9e | 59 | |
252b5132 RH |
60 | /* fdopen is a loser -- we should use stdio exclusively. Unfortunately |
61 | if we do that we can't use fcntl. */ | |
62 | ||
252b5132 RH |
63 | /* Return a new BFD. All BFD's are allocated through this routine. */ |
64 | ||
65 | bfd * | |
c58b9523 | 66 | _bfd_new_bfd (void) |
252b5132 RH |
67 | { |
68 | bfd *nbfd; | |
69 | ||
a50b1753 | 70 | nbfd = (bfd *) bfd_zmalloc (sizeof (bfd)); |
252b5132 RH |
71 | if (nbfd == NULL) |
72 | return NULL; | |
73 | ||
fc1cfaa5 AM |
74 | if (bfd_use_reserved_id) |
75 | { | |
76 | nbfd->id = --bfd_reserved_id_counter; | |
77 | --bfd_use_reserved_id; | |
78 | } | |
79 | else | |
80 | nbfd->id = bfd_id_counter++; | |
52b69c9e | 81 | |
c58b9523 | 82 | nbfd->memory = objalloc_create (); |
252b5132 RH |
83 | if (nbfd->memory == NULL) |
84 | { | |
85 | bfd_set_error (bfd_error_no_memory); | |
73e87d70 | 86 | free (nbfd); |
252b5132 RH |
87 | return NULL; |
88 | } | |
89 | ||
90 | nbfd->arch_info = &bfd_default_arch_struct; | |
91 | ||
28d39d1a | 92 | if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc, |
c9ba0c87 | 93 | sizeof (struct section_hash_entry), 13)) |
73e87d70 | 94 | { |
0490dd41 | 95 | objalloc_free ((struct objalloc *) nbfd->memory); |
73e87d70 AM |
96 | free (nbfd); |
97 | return NULL; | |
98 | } | |
252b5132 | 99 | |
91817247 L |
100 | nbfd->archive_plugin_fd = -1; |
101 | ||
252b5132 RH |
102 | return nbfd; |
103 | } | |
104 | ||
b374d0f8 AM |
105 | static const struct bfd_iovec opncls_iovec; |
106 | ||
252b5132 RH |
107 | /* Allocate a new BFD as a member of archive OBFD. */ |
108 | ||
109 | bfd * | |
c58b9523 | 110 | _bfd_new_bfd_contained_in (bfd *obfd) |
252b5132 RH |
111 | { |
112 | bfd *nbfd; | |
113 | ||
c50e4ced AM |
114 | /* Nested archives in bims are unsupported. */ |
115 | if ((obfd->flags & BFD_IN_MEMORY) != 0) | |
116 | { | |
117 | bfd_set_error (bfd_error_malformed_archive); | |
118 | return NULL; | |
119 | } | |
252b5132 | 120 | nbfd = _bfd_new_bfd (); |
301e3139 AM |
121 | if (nbfd == NULL) |
122 | return NULL; | |
252b5132 | 123 | nbfd->xvec = obfd->xvec; |
40838a72 | 124 | nbfd->iovec = obfd->iovec; |
b374d0f8 AM |
125 | if (obfd->iovec == &opncls_iovec) |
126 | nbfd->iostream = obfd->iostream; | |
252b5132 RH |
127 | nbfd->my_archive = obfd; |
128 | nbfd->direction = read_direction; | |
129 | nbfd->target_defaulted = obfd->target_defaulted; | |
ce875075 AM |
130 | nbfd->lto_output = obfd->lto_output; |
131 | nbfd->no_export = obfd->no_export; | |
252b5132 RH |
132 | return nbfd; |
133 | } | |
134 | ||
73e87d70 AM |
135 | /* Delete a BFD. */ |
136 | ||
7b84f8da | 137 | static void |
c58b9523 | 138 | _bfd_delete_bfd (bfd *abfd) |
73e87d70 | 139 | { |
b25e3d87 L |
140 | if (abfd->memory) |
141 | { | |
142 | bfd_hash_table_free (&abfd->section_htab); | |
143 | objalloc_free ((struct objalloc *) abfd->memory); | |
144 | } | |
0490dd41 AM |
145 | else |
146 | free ((char *) bfd_get_filename (abfd)); | |
a988325c | 147 | |
06e7acd7 | 148 | free (abfd->arelt_data); |
73e87d70 AM |
149 | free (abfd); |
150 | } | |
151 | ||
b25e3d87 L |
152 | /* Free objalloc memory. */ |
153 | ||
0a1b45a2 | 154 | bool |
b25e3d87 L |
155 | _bfd_free_cached_info (bfd *abfd) |
156 | { | |
157 | if (abfd->memory) | |
158 | { | |
0490dd41 AM |
159 | const char *filename = bfd_get_filename (abfd); |
160 | if (filename) | |
161 | { | |
162 | /* We can't afford to lose the bfd filename when freeing | |
163 | abfd->memory, because that would kill the cache.c scheme | |
164 | of closing and reopening files in order to limit the | |
165 | number of open files. To reopen, you need the filename. | |
166 | And indeed _bfd_compute_and_write_armap calls | |
167 | _bfd_free_cached_info to free up space used by symbols | |
168 | and by check_format_matches. Which we want to continue | |
169 | doing to handle very large archives. Later the archive | |
170 | elements are copied, which might require reopening files. | |
171 | We also want to keep using objalloc memory for the | |
172 | filename since that allows the name to be updated | |
173 | without either leaking memory or implementing some sort | |
174 | of reference counted string for copies of the filename. */ | |
175 | size_t len = strlen (filename) + 1; | |
176 | char *copy = bfd_malloc (len); | |
177 | if (copy == NULL) | |
0a1b45a2 | 178 | return false; |
0490dd41 AM |
179 | memcpy (copy, filename, len); |
180 | abfd->filename = copy; | |
181 | } | |
b25e3d87 L |
182 | bfd_hash_table_free (&abfd->section_htab); |
183 | objalloc_free ((struct objalloc *) abfd->memory); | |
184 | ||
185 | abfd->sections = NULL; | |
186 | abfd->section_last = NULL; | |
187 | abfd->outsymbols = NULL; | |
188 | abfd->tdata.any = NULL; | |
189 | abfd->usrdata = NULL; | |
190 | abfd->memory = NULL; | |
191 | } | |
192 | ||
0a1b45a2 | 193 | return true; |
b25e3d87 L |
194 | } |
195 | ||
252b5132 RH |
196 | /* |
197 | FUNCTION | |
2d0123b7 | 198 | bfd_fopen |
252b5132 RH |
199 | |
200 | SYNOPSIS | |
2d0123b7 | 201 | bfd *bfd_fopen (const char *filename, const char *target, |
07d6d2b8 | 202 | const char *mode, int fd); |
252b5132 RH |
203 | |
204 | DESCRIPTION | |
2d0123b7 MM |
205 | Open the file @var{filename} with the target @var{target}. |
206 | Return a pointer to the created BFD. If @var{fd} is not -1, | |
207 | then <<fdopen>> is used to open the file; otherwise, <<fopen>> | |
208 | is used. @var{mode} is passed directly to <<fopen>> or | |
68ffbac6 | 209 | <<fdopen>>. |
252b5132 RH |
210 | |
211 | Calls <<bfd_find_target>>, so @var{target} is interpreted as by | |
212 | that function. | |
213 | ||
a366f4ff MM |
214 | The new BFD is marked as cacheable iff @var{fd} is -1. |
215 | ||
252b5132 | 216 | If <<NULL>> is returned then an error has occured. Possible errors |
7c4a37eb AM |
217 | are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or |
218 | <<system_call>> error. | |
6f0c7050 TT |
219 | |
220 | On error, @var{fd} is always closed. | |
1be5090b NC |
221 | |
222 | A copy of the @var{filename} argument is stored in the newly created | |
223 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
224 | */ |
225 | ||
226 | bfd * | |
2d0123b7 | 227 | bfd_fopen (const char *filename, const char *target, const char *mode, int fd) |
252b5132 RH |
228 | { |
229 | bfd *nbfd; | |
230 | const bfd_target *target_vec; | |
231 | ||
232 | nbfd = _bfd_new_bfd (); | |
233 | if (nbfd == NULL) | |
6f0c7050 TT |
234 | { |
235 | if (fd != -1) | |
236 | close (fd); | |
237 | return NULL; | |
238 | } | |
252b5132 RH |
239 | |
240 | target_vec = bfd_find_target (target, nbfd); | |
241 | if (target_vec == NULL) | |
242 | { | |
6f0c7050 TT |
243 | if (fd != -1) |
244 | close (fd); | |
73e87d70 | 245 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
246 | return NULL; |
247 | } | |
68ffbac6 | 248 | |
2d0123b7 MM |
249 | #ifdef HAVE_FDOPEN |
250 | if (fd != -1) | |
251 | nbfd->iostream = fdopen (fd, mode); | |
252 | else | |
253 | #endif | |
c7c3d11b | 254 | nbfd->iostream = _bfd_real_fopen (filename, mode); |
2d0123b7 MM |
255 | if (nbfd->iostream == NULL) |
256 | { | |
92a7c1b8 | 257 | bfd_set_error (bfd_error_system_call); |
89bdc77e AM |
258 | if (fd != -1) |
259 | close (fd); | |
2d0123b7 MM |
260 | _bfd_delete_bfd (nbfd); |
261 | return NULL; | |
262 | } | |
252b5132 | 263 | |
2d0123b7 | 264 | /* OK, put everything where it belongs. */ |
1be5090b NC |
265 | |
266 | /* PR 11983: Do not cache the original filename, but | |
267 | rather make a copy - the original might go away. */ | |
7b958a48 | 268 | if (!bfd_set_filename (nbfd, filename)) |
89bdc77e AM |
269 | { |
270 | fclose (nbfd->iostream); | |
271 | _bfd_delete_bfd (nbfd); | |
272 | return NULL; | |
273 | } | |
252b5132 | 274 | |
2d0123b7 MM |
275 | /* Figure out whether the user is opening the file for reading, |
276 | writing, or both, by looking at the MODE argument. */ | |
68ffbac6 | 277 | if ((mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a') |
2d0123b7 MM |
278 | && mode[1] == '+') |
279 | nbfd->direction = both_direction; | |
280 | else if (mode[0] == 'r') | |
281 | nbfd->direction = read_direction; | |
282 | else | |
283 | nbfd->direction = write_direction; | |
284 | ||
89bdc77e | 285 | if (!bfd_cache_init (nbfd)) |
252b5132 | 286 | { |
89bdc77e | 287 | fclose (nbfd->iostream); |
73e87d70 | 288 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
289 | return NULL; |
290 | } | |
0a1b45a2 | 291 | nbfd->opened_once = true; |
a253d456 | 292 | |
a366f4ff MM |
293 | /* If we opened the file by name, mark it cacheable; we can close it |
294 | and reopen it later. However, if a file descriptor was provided, | |
295 | then it may have been opened with special flags that make it | |
296 | unsafe to close and reopen the file. */ | |
297 | if (fd == -1) | |
0a1b45a2 | 298 | (void) bfd_set_cacheable (nbfd, true); |
252b5132 RH |
299 | |
300 | return nbfd; | |
301 | } | |
302 | ||
2d0123b7 MM |
303 | /* |
304 | FUNCTION | |
305 | bfd_openr | |
306 | ||
307 | SYNOPSIS | |
308 | bfd *bfd_openr (const char *filename, const char *target); | |
309 | ||
310 | DESCRIPTION | |
311 | Open the file @var{filename} (using <<fopen>>) with the target | |
312 | @var{target}. Return a pointer to the created BFD. | |
313 | ||
314 | Calls <<bfd_find_target>>, so @var{target} is interpreted as by | |
315 | that function. | |
316 | ||
317 | If <<NULL>> is returned then an error has occured. Possible errors | |
318 | are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or | |
319 | <<system_call>> error. | |
1be5090b NC |
320 | |
321 | A copy of the @var{filename} argument is stored in the newly created | |
322 | BFD. It can be accessed via the bfd_get_filename() macro. | |
2d0123b7 MM |
323 | */ |
324 | ||
325 | bfd * | |
326 | bfd_openr (const char *filename, const char *target) | |
327 | { | |
328 | return bfd_fopen (filename, target, FOPEN_RB, -1); | |
329 | } | |
330 | ||
252b5132 RH |
331 | /* Don't try to `optimize' this function: |
332 | ||
333 | o - We lock using stack space so that interrupting the locking | |
334 | won't cause a storage leak. | |
335 | o - We open the file stream last, since we don't want to have to | |
336 | close it if anything goes wrong. Closing the stream means closing | |
c4f3d130 | 337 | the file descriptor too, even though we didn't open it. */ |
252b5132 RH |
338 | /* |
339 | FUNCTION | |
7c4a37eb | 340 | bfd_fdopenr |
252b5132 RH |
341 | |
342 | SYNOPSIS | |
c58b9523 | 343 | bfd *bfd_fdopenr (const char *filename, const char *target, int fd); |
252b5132 RH |
344 | |
345 | DESCRIPTION | |
7c4a37eb AM |
346 | <<bfd_fdopenr>> is to <<bfd_fopenr>> much like <<fdopen>> is to |
347 | <<fopen>>. It opens a BFD on a file already described by the | |
348 | @var{fd} supplied. | |
349 | ||
350 | When the file is later <<bfd_close>>d, the file descriptor will | |
351 | be closed. If the caller desires that this file descriptor be | |
352 | cached by BFD (opened as needed, closed as needed to free | |
353 | descriptors for other opens), with the supplied @var{fd} used as | |
354 | an initial file descriptor (but subject to closure at any time), | |
355 | call bfd_set_cacheable(bfd, 1) on the returned BFD. The default | |
7dee875e | 356 | is to assume no caching; the file descriptor will remain open |
7c4a37eb AM |
357 | until <<bfd_close>>, and will not be affected by BFD operations |
358 | on other files. | |
359 | ||
360 | Possible errors are <<bfd_error_no_memory>>, | |
361 | <<bfd_error_invalid_target>> and <<bfd_error_system_call>>. | |
6f0c7050 TT |
362 | |
363 | On error, @var{fd} is closed. | |
1be5090b NC |
364 | |
365 | A copy of the @var{filename} argument is stored in the newly created | |
366 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
367 | */ |
368 | ||
369 | bfd * | |
c58b9523 | 370 | bfd_fdopenr (const char *filename, const char *target, int fd) |
252b5132 | 371 | { |
2d0123b7 MM |
372 | const char *mode; |
373 | #if defined(HAVE_FCNTL) && defined(F_GETFL) | |
252b5132 | 374 | int fdflags; |
2d0123b7 | 375 | #endif |
252b5132 | 376 | |
252b5132 | 377 | #if ! defined(HAVE_FCNTL) || ! defined(F_GETFL) |
2d0123b7 | 378 | mode = FOPEN_RUB; /* Assume full access. */ |
252b5132 RH |
379 | #else |
380 | fdflags = fcntl (fd, F_GETFL, NULL); | |
767e34d1 | 381 | if (fdflags == -1) |
d83747fa | 382 | { |
6f0c7050 TT |
383 | int save = errno; |
384 | ||
385 | close (fd); | |
386 | errno = save; | |
d83747fa AM |
387 | bfd_set_error (bfd_error_system_call); |
388 | return NULL; | |
389 | } | |
252b5132 | 390 | |
c4f3d130 | 391 | /* (O_ACCMODE) parens are to avoid Ultrix header file bug. */ |
252b5132 RH |
392 | switch (fdflags & (O_ACCMODE)) |
393 | { | |
dfab97d6 MM |
394 | case O_RDONLY: mode = FOPEN_RB; break; |
395 | case O_WRONLY: mode = FOPEN_RUB; break; | |
396 | case O_RDWR: mode = FOPEN_RUB; break; | |
252b5132 RH |
397 | default: abort (); |
398 | } | |
399 | #endif | |
400 | ||
2d0123b7 | 401 | return bfd_fopen (filename, target, mode, fd); |
252b5132 RH |
402 | } |
403 | ||
365f5fb6 SP |
404 | /* |
405 | FUNCTION | |
406 | bfd_fdopenw | |
407 | ||
408 | SYNOPSIS | |
409 | bfd *bfd_fdopenw (const char *filename, const char *target, int fd); | |
410 | ||
411 | DESCRIPTION | |
412 | <<bfd_fdopenw>> is exactly like <<bfd_fdopenr>> with the exception that | |
413 | the resulting BFD is suitable for output. | |
414 | */ | |
415 | ||
416 | bfd * | |
417 | bfd_fdopenw (const char *filename, const char *target, int fd) | |
418 | { | |
419 | bfd *out = bfd_fdopenr (filename, target, fd); | |
420 | ||
421 | if (out != NULL) | |
422 | { | |
423 | if (!bfd_write_p (out)) | |
424 | { | |
425 | close (fd); | |
426 | _bfd_delete_bfd (out); | |
427 | out = NULL; | |
428 | bfd_set_error (bfd_error_invalid_operation); | |
429 | } | |
430 | else | |
431 | out->direction = write_direction; | |
432 | } | |
433 | ||
434 | return out; | |
435 | } | |
436 | ||
252b5132 RH |
437 | /* |
438 | FUNCTION | |
439 | bfd_openstreamr | |
440 | ||
441 | SYNOPSIS | |
49f4617b | 442 | bfd *bfd_openstreamr (const char * filename, const char * target, |
07d6d2b8 | 443 | void * stream); |
252b5132 RH |
444 | |
445 | DESCRIPTION | |
252b5132 RH |
446 | Open a BFD for read access on an existing stdio stream. When |
447 | the BFD is passed to <<bfd_close>>, the stream will be closed. | |
1be5090b NC |
448 | |
449 | A copy of the @var{filename} argument is stored in the newly created | |
450 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
451 | */ |
452 | ||
453 | bfd * | |
c58b9523 | 454 | bfd_openstreamr (const char *filename, const char *target, void *streamarg) |
252b5132 | 455 | { |
a50b1753 | 456 | FILE *stream = (FILE *) streamarg; |
252b5132 RH |
457 | bfd *nbfd; |
458 | const bfd_target *target_vec; | |
459 | ||
460 | nbfd = _bfd_new_bfd (); | |
461 | if (nbfd == NULL) | |
462 | return NULL; | |
463 | ||
464 | target_vec = bfd_find_target (target, nbfd); | |
465 | if (target_vec == NULL) | |
466 | { | |
73e87d70 | 467 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
468 | return NULL; |
469 | } | |
470 | ||
c58b9523 | 471 | nbfd->iostream = stream; |
1be5090b NC |
472 | /* PR 11983: Do not cache the original filename, but |
473 | rather make a copy - the original might go away. */ | |
7b958a48 | 474 | if (!bfd_set_filename (nbfd, filename)) |
89bdc77e AM |
475 | { |
476 | _bfd_delete_bfd (nbfd); | |
477 | return NULL; | |
478 | } | |
252b5132 | 479 | nbfd->direction = read_direction; |
dc810e39 | 480 | |
252b5132 RH |
481 | if (! bfd_cache_init (nbfd)) |
482 | { | |
73e87d70 | 483 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
484 | return NULL; |
485 | } | |
486 | ||
487 | return nbfd; | |
488 | } | |
40838a72 AC |
489 | |
490 | /* | |
491 | FUNCTION | |
492 | bfd_openr_iovec | |
493 | ||
494 | SYNOPSIS | |
07d6d2b8 AM |
495 | bfd *bfd_openr_iovec (const char *filename, const char *target, |
496 | void *(*open_func) (struct bfd *nbfd, | |
497 | void *open_closure), | |
498 | void *open_closure, | |
499 | file_ptr (*pread_func) (struct bfd *nbfd, | |
500 | void *stream, | |
501 | void *buf, | |
502 | file_ptr nbytes, | |
503 | file_ptr offset), | |
504 | int (*close_func) (struct bfd *nbfd, | |
505 | void *stream), | |
e7f8eadb | 506 | int (*stat_func) (struct bfd *abfd, |
07d6d2b8 AM |
507 | void *stream, |
508 | struct stat *sb)); | |
40838a72 AC |
509 | |
510 | DESCRIPTION | |
07d6d2b8 AM |
511 | Create and return a BFD backed by a read-only @var{stream}. |
512 | The @var{stream} is created using @var{open_func}, accessed using | |
513 | @var{pread_func} and destroyed using @var{close_func}. | |
40838a72 AC |
514 | |
515 | Calls <<bfd_find_target>>, so @var{target} is interpreted as by | |
516 | that function. | |
517 | ||
e7f8eadb | 518 | Calls @var{open_func} (which can call <<bfd_zalloc>> and |
40838a72 | 519 | <<bfd_get_filename>>) to obtain the read-only stream backing |
e7f8eadb | 520 | the BFD. @var{open_func} either succeeds returning the |
40838a72 AC |
521 | non-<<NULL>> @var{stream}, or fails returning <<NULL>> |
522 | (setting <<bfd_error>>). | |
523 | ||
e7f8eadb | 524 | Calls @var{pread_func} to request @var{nbytes} of data from |
40838a72 | 525 | @var{stream} starting at @var{offset} (e.g., via a call to |
e7f8eadb | 526 | <<bfd_read>>). @var{pread_func} either succeeds returning the |
40838a72 AC |
527 | number of bytes read (which can be less than @var{nbytes} when |
528 | end-of-file), or fails returning -1 (setting <<bfd_error>>). | |
529 | ||
e7f8eadb DK |
530 | Calls @var{close_func} when the BFD is later closed using |
531 | <<bfd_close>>. @var{close_func} either succeeds returning 0, or | |
40838a72 AC |
532 | fails returning -1 (setting <<bfd_error>>). |
533 | ||
e7f8eadb DK |
534 | Calls @var{stat_func} to fill in a stat structure for bfd_stat, |
535 | bfd_get_size, and bfd_get_mtime calls. @var{stat_func} returns 0 | |
f6cf9273 AM |
536 | on success, or returns -1 on failure (setting <<bfd_error>>). |
537 | ||
40838a72 AC |
538 | If <<bfd_openr_iovec>> returns <<NULL>> then an error has |
539 | occurred. Possible errors are <<bfd_error_no_memory>>, | |
540 | <<bfd_error_invalid_target>> and <<bfd_error_system_call>>. | |
541 | ||
1be5090b NC |
542 | A copy of the @var{filename} argument is stored in the newly created |
543 | BFD. It can be accessed via the bfd_get_filename() macro. | |
40838a72 AC |
544 | */ |
545 | ||
546 | struct opncls | |
547 | { | |
548 | void *stream; | |
549 | file_ptr (*pread) (struct bfd *abfd, void *stream, void *buf, | |
550 | file_ptr nbytes, file_ptr offset); | |
551 | int (*close) (struct bfd *abfd, void *stream); | |
f6cf9273 | 552 | int (*stat) (struct bfd *abfd, void *stream, struct stat *sb); |
40838a72 AC |
553 | file_ptr where; |
554 | }; | |
555 | ||
556 | static file_ptr | |
557 | opncls_btell (struct bfd *abfd) | |
558 | { | |
a50b1753 | 559 | struct opncls *vec = (struct opncls *) abfd->iostream; |
40838a72 AC |
560 | return vec->where; |
561 | } | |
562 | ||
563 | static int | |
564 | opncls_bseek (struct bfd *abfd, file_ptr offset, int whence) | |
565 | { | |
a50b1753 | 566 | struct opncls *vec = (struct opncls *) abfd->iostream; |
40838a72 AC |
567 | switch (whence) |
568 | { | |
569 | case SEEK_SET: vec->where = offset; break; | |
570 | case SEEK_CUR: vec->where += offset; break; | |
571 | case SEEK_END: return -1; | |
572 | } | |
573 | return 0; | |
574 | } | |
575 | ||
576 | static file_ptr | |
577 | opncls_bread (struct bfd *abfd, void *buf, file_ptr nbytes) | |
578 | { | |
a50b1753 | 579 | struct opncls *vec = (struct opncls *) abfd->iostream; |
0709bb22 | 580 | file_ptr nread = (vec->pread) (abfd, vec->stream, buf, nbytes, vec->where); |
49f4617b | 581 | |
40838a72 AC |
582 | if (nread < 0) |
583 | return nread; | |
584 | vec->where += nread; | |
585 | return nread; | |
586 | } | |
587 | ||
588 | static file_ptr | |
589 | opncls_bwrite (struct bfd *abfd ATTRIBUTE_UNUSED, | |
590 | const void *where ATTRIBUTE_UNUSED, | |
591 | file_ptr nbytes ATTRIBUTE_UNUSED) | |
592 | { | |
593 | return -1; | |
594 | } | |
595 | ||
405bf443 | 596 | static int |
40838a72 AC |
597 | opncls_bclose (struct bfd *abfd) |
598 | { | |
a50b1753 | 599 | struct opncls *vec = (struct opncls *) abfd->iostream; |
40838a72 AC |
600 | /* Since the VEC's memory is bound to the bfd deleting the bfd will |
601 | free it. */ | |
602 | int status = 0; | |
49f4617b | 603 | |
40838a72 | 604 | if (vec->close != NULL) |
0709bb22 | 605 | status = (vec->close) (abfd, vec->stream); |
40838a72 | 606 | abfd->iostream = NULL; |
405bf443 | 607 | return status; |
40838a72 AC |
608 | } |
609 | ||
610 | static int | |
611 | opncls_bflush (struct bfd *abfd ATTRIBUTE_UNUSED) | |
612 | { | |
613 | return 0; | |
614 | } | |
615 | ||
616 | static int | |
f6cf9273 | 617 | opncls_bstat (struct bfd *abfd, struct stat *sb) |
40838a72 | 618 | { |
a50b1753 | 619 | struct opncls *vec = (struct opncls *) abfd->iostream; |
f6cf9273 | 620 | |
40838a72 | 621 | memset (sb, 0, sizeof (*sb)); |
f6cf9273 AM |
622 | if (vec->stat == NULL) |
623 | return 0; | |
624 | ||
625 | return (vec->stat) (abfd, vec->stream, sb); | |
40838a72 AC |
626 | } |
627 | ||
25b88f33 PP |
628 | static void * |
629 | opncls_bmmap (struct bfd *abfd ATTRIBUTE_UNUSED, | |
630 | void *addr ATTRIBUTE_UNUSED, | |
631 | bfd_size_type len ATTRIBUTE_UNUSED, | |
632 | int prot ATTRIBUTE_UNUSED, | |
633 | int flags ATTRIBUTE_UNUSED, | |
4c95ab76 | 634 | file_ptr offset ATTRIBUTE_UNUSED, |
07d6d2b8 AM |
635 | void **map_addr ATTRIBUTE_UNUSED, |
636 | bfd_size_type *map_len ATTRIBUTE_UNUSED) | |
25b88f33 PP |
637 | { |
638 | return (void *) -1; | |
639 | } | |
640 | ||
49f4617b PA |
641 | static const struct bfd_iovec opncls_iovec = |
642 | { | |
40838a72 | 643 | &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek, |
25b88f33 | 644 | &opncls_bclose, &opncls_bflush, &opncls_bstat, &opncls_bmmap |
40838a72 AC |
645 | }; |
646 | ||
647 | bfd * | |
648 | bfd_openr_iovec (const char *filename, const char *target, | |
662e4701 | 649 | void *(*open_p) (struct bfd *, void *), |
40838a72 | 650 | void *open_closure, |
662e4701 L |
651 | file_ptr (*pread_p) (struct bfd *, void *, void *, |
652 | file_ptr, file_ptr), | |
653 | int (*close_p) (struct bfd *, void *), | |
654 | int (*stat_p) (struct bfd *, void *, struct stat *)) | |
40838a72 AC |
655 | { |
656 | bfd *nbfd; | |
657 | const bfd_target *target_vec; | |
658 | struct opncls *vec; | |
659 | void *stream; | |
660 | ||
661 | nbfd = _bfd_new_bfd (); | |
662 | if (nbfd == NULL) | |
663 | return NULL; | |
664 | ||
665 | target_vec = bfd_find_target (target, nbfd); | |
666 | if (target_vec == NULL) | |
667 | { | |
668 | _bfd_delete_bfd (nbfd); | |
669 | return NULL; | |
670 | } | |
671 | ||
1be5090b NC |
672 | /* PR 11983: Do not cache the original filename, but |
673 | rather make a copy - the original might go away. */ | |
7b958a48 | 674 | if (!bfd_set_filename (nbfd, filename)) |
89bdc77e AM |
675 | { |
676 | _bfd_delete_bfd (nbfd); | |
677 | return NULL; | |
678 | } | |
40838a72 AC |
679 | nbfd->direction = read_direction; |
680 | ||
662e4701 L |
681 | /* `open_p (...)' would get expanded by an the open(2) syscall macro. */ |
682 | stream = (*open_p) (nbfd, open_closure); | |
40838a72 AC |
683 | if (stream == NULL) |
684 | { | |
685 | _bfd_delete_bfd (nbfd); | |
686 | return NULL; | |
687 | } | |
688 | ||
a50b1753 | 689 | vec = (struct opncls *) bfd_zalloc (nbfd, sizeof (struct opncls)); |
40838a72 | 690 | vec->stream = stream; |
662e4701 L |
691 | vec->pread = pread_p; |
692 | vec->close = close_p; | |
693 | vec->stat = stat_p; | |
40838a72 AC |
694 | |
695 | nbfd->iovec = &opncls_iovec; | |
696 | nbfd->iostream = vec; | |
697 | ||
698 | return nbfd; | |
699 | } | |
252b5132 | 700 | \f |
c4f3d130 NC |
701 | /* bfd_openw -- open for writing. |
702 | Returns a pointer to a freshly-allocated BFD on success, or NULL. | |
252b5132 | 703 | |
c4f3d130 | 704 | See comment by bfd_fdopenr before you try to modify this function. */ |
252b5132 RH |
705 | |
706 | /* | |
707 | FUNCTION | |
708 | bfd_openw | |
709 | ||
710 | SYNOPSIS | |
c58b9523 | 711 | bfd *bfd_openw (const char *filename, const char *target); |
252b5132 RH |
712 | |
713 | DESCRIPTION | |
714 | Create a BFD, associated with file @var{filename}, using the | |
715 | file format @var{target}, and return a pointer to it. | |
716 | ||
717 | Possible errors are <<bfd_error_system_call>>, <<bfd_error_no_memory>>, | |
718 | <<bfd_error_invalid_target>>. | |
1be5090b NC |
719 | |
720 | A copy of the @var{filename} argument is stored in the newly created | |
721 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
722 | */ |
723 | ||
724 | bfd * | |
c58b9523 | 725 | bfd_openw (const char *filename, const char *target) |
252b5132 RH |
726 | { |
727 | bfd *nbfd; | |
728 | const bfd_target *target_vec; | |
729 | ||
252b5132 | 730 | /* nbfd has to point to head of malloc'ed block so that bfd_close may |
c4f3d130 | 731 | reclaim it correctly. */ |
252b5132 RH |
732 | nbfd = _bfd_new_bfd (); |
733 | if (nbfd == NULL) | |
734 | return NULL; | |
735 | ||
736 | target_vec = bfd_find_target (target, nbfd); | |
737 | if (target_vec == NULL) | |
738 | { | |
73e87d70 | 739 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
740 | return NULL; |
741 | } | |
742 | ||
1be5090b NC |
743 | /* PR 11983: Do not cache the original filename, but |
744 | rather make a copy - the original might go away. */ | |
7b958a48 | 745 | if (!bfd_set_filename (nbfd, filename)) |
89bdc77e AM |
746 | { |
747 | _bfd_delete_bfd (nbfd); | |
748 | return NULL; | |
749 | } | |
252b5132 RH |
750 | nbfd->direction = write_direction; |
751 | ||
752 | if (bfd_open_file (nbfd) == NULL) | |
753 | { | |
c4f3d130 NC |
754 | /* File not writeable, etc. */ |
755 | bfd_set_error (bfd_error_system_call); | |
73e87d70 | 756 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
757 | return NULL; |
758 | } | |
759 | ||
760 | return nbfd; | |
761 | } | |
762 | ||
8c7d38e8 NC |
763 | static inline void |
764 | _maybe_make_executable (bfd * abfd) | |
765 | { | |
766 | /* If the file was open for writing and is now executable, | |
767 | make it so. */ | |
768 | if (abfd->direction == write_direction | |
dbde1c12 | 769 | && (abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
8c7d38e8 NC |
770 | { |
771 | struct stat buf; | |
772 | ||
765cf5f6 | 773 | if (stat (bfd_get_filename (abfd), &buf) == 0 |
8c7d38e8 NC |
774 | /* Do not attempt to change non-regular files. This is |
775 | here especially for configure scripts and kernel builds | |
776 | which run tests with "ld [...] -o /dev/null". */ | |
777 | && S_ISREG(buf.st_mode)) | |
778 | { | |
779 | unsigned int mask = umask (0); | |
780 | ||
781 | umask (mask); | |
765cf5f6 | 782 | chmod (bfd_get_filename (abfd), |
8c7d38e8 NC |
783 | (0777 |
784 | & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask)))); | |
785 | } | |
786 | } | |
787 | } | |
788 | ||
252b5132 | 789 | /* |
252b5132 RH |
790 | FUNCTION |
791 | bfd_close | |
792 | ||
793 | SYNOPSIS | |
0a1b45a2 | 794 | bool bfd_close (bfd *abfd); |
252b5132 RH |
795 | |
796 | DESCRIPTION | |
7c4a37eb AM |
797 | Close a BFD. If the BFD was open for writing, then pending |
798 | operations are completed and the file written out and closed. | |
799 | If the created file is executable, then <<chmod>> is called | |
800 | to mark it as such. | |
252b5132 RH |
801 | |
802 | All memory attached to the BFD is released. | |
803 | ||
804 | The file descriptor associated with the BFD is closed (even | |
805 | if it was passed in to BFD by <<bfd_fdopenr>>). | |
806 | ||
b34976b6 | 807 | <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. |
252b5132 RH |
808 | */ |
809 | ||
0a1b45a2 | 810 | bool |
c58b9523 | 811 | bfd_close (bfd *abfd) |
252b5132 | 812 | { |
8219cab3 AM |
813 | bool ret = (!bfd_write_p (abfd) |
814 | || BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd))); | |
252b5132 | 815 | |
8219cab3 | 816 | return bfd_close_all_done (abfd) && ret; |
252b5132 RH |
817 | } |
818 | ||
819 | /* | |
820 | FUNCTION | |
821 | bfd_close_all_done | |
822 | ||
823 | SYNOPSIS | |
0a1b45a2 | 824 | bool bfd_close_all_done (bfd *); |
252b5132 RH |
825 | |
826 | DESCRIPTION | |
7c4a37eb AM |
827 | Close a BFD. Differs from <<bfd_close>> since it does not |
828 | complete any pending operations. This routine would be used | |
829 | if the application had just used BFD for swapping and didn't | |
830 | want to use any of the writing code. | |
252b5132 RH |
831 | |
832 | If the created file is executable, then <<chmod>> is called | |
833 | to mark it as such. | |
834 | ||
835 | All memory attached to the BFD is released. | |
836 | ||
b34976b6 | 837 | <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. |
252b5132 RH |
838 | */ |
839 | ||
0a1b45a2 | 840 | bool |
c58b9523 | 841 | bfd_close_all_done (bfd *abfd) |
252b5132 | 842 | { |
8219cab3 | 843 | bool ret = BFD_SEND (abfd, _close_and_cleanup, (abfd)); |
7c0ed396 | 844 | |
8219cab3 AM |
845 | if (ret && abfd->iovec != NULL) |
846 | { | |
847 | ret = abfd->iovec->bclose (abfd) == 0; | |
e234de6b | 848 | |
8219cab3 AM |
849 | if (ret) |
850 | _maybe_make_executable (abfd); | |
851 | } | |
252b5132 | 852 | |
73e87d70 | 853 | _bfd_delete_bfd (abfd); |
252b5132 RH |
854 | |
855 | return ret; | |
856 | } | |
857 | ||
858 | /* | |
859 | FUNCTION | |
860 | bfd_create | |
861 | ||
862 | SYNOPSIS | |
c58b9523 | 863 | bfd *bfd_create (const char *filename, bfd *templ); |
252b5132 RH |
864 | |
865 | DESCRIPTION | |
7c4a37eb AM |
866 | Create a new BFD in the manner of <<bfd_openw>>, but without |
867 | opening a file. The new BFD takes the target from the target | |
fc1cfaa5 | 868 | used by @var{templ}. The format is always set to <<bfd_object>>. |
1be5090b NC |
869 | |
870 | A copy of the @var{filename} argument is stored in the newly created | |
871 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
872 | */ |
873 | ||
874 | bfd * | |
c58b9523 | 875 | bfd_create (const char *filename, bfd *templ) |
252b5132 RH |
876 | { |
877 | bfd *nbfd; | |
878 | ||
879 | nbfd = _bfd_new_bfd (); | |
880 | if (nbfd == NULL) | |
881 | return NULL; | |
1be5090b NC |
882 | /* PR 11983: Do not cache the original filename, but |
883 | rather make a copy - the original might go away. */ | |
7b958a48 | 884 | if (!bfd_set_filename (nbfd, filename)) |
89bdc77e AM |
885 | { |
886 | _bfd_delete_bfd (nbfd); | |
887 | return NULL; | |
888 | } | |
252b5132 RH |
889 | if (templ) |
890 | nbfd->xvec = templ->xvec; | |
891 | nbfd->direction = no_direction; | |
892 | bfd_set_format (nbfd, bfd_object); | |
c4f3d130 | 893 | |
252b5132 RH |
894 | return nbfd; |
895 | } | |
896 | ||
897 | /* | |
898 | FUNCTION | |
899 | bfd_make_writable | |
900 | ||
901 | SYNOPSIS | |
0a1b45a2 | 902 | bool bfd_make_writable (bfd *abfd); |
252b5132 RH |
903 | |
904 | DESCRIPTION | |
905 | Takes a BFD as created by <<bfd_create>> and converts it | |
906 | into one like as returned by <<bfd_openw>>. It does this | |
907 | by converting the BFD to BFD_IN_MEMORY. It's assumed that | |
908 | you will call <<bfd_make_readable>> on this bfd later. | |
909 | ||
b34976b6 | 910 | <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. |
252b5132 RH |
911 | */ |
912 | ||
0a1b45a2 | 913 | bool |
c58b9523 | 914 | bfd_make_writable (bfd *abfd) |
252b5132 RH |
915 | { |
916 | struct bfd_in_memory *bim; | |
917 | ||
918 | if (abfd->direction != no_direction) | |
919 | { | |
920 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 921 | return false; |
252b5132 RH |
922 | } |
923 | ||
a50b1753 | 924 | bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory)); |
f6eea5ae | 925 | if (bim == NULL) |
0a1b45a2 | 926 | return false; /* bfd_error already set. */ |
c58b9523 | 927 | abfd->iostream = bim; |
c4f3d130 | 928 | /* bfd_bwrite will grow these as needed. */ |
252b5132 RH |
929 | bim->size = 0; |
930 | bim->buffer = 0; | |
931 | ||
932 | abfd->flags |= BFD_IN_MEMORY; | |
65077aa8 TG |
933 | abfd->iovec = &_bfd_memory_iovec; |
934 | abfd->origin = 0; | |
252b5132 RH |
935 | abfd->direction = write_direction; |
936 | abfd->where = 0; | |
937 | ||
0a1b45a2 | 938 | return true; |
252b5132 RH |
939 | } |
940 | ||
941 | /* | |
942 | FUNCTION | |
943 | bfd_make_readable | |
944 | ||
945 | SYNOPSIS | |
0a1b45a2 | 946 | bool bfd_make_readable (bfd *abfd); |
252b5132 RH |
947 | |
948 | DESCRIPTION | |
949 | Takes a BFD as created by <<bfd_create>> and | |
950 | <<bfd_make_writable>> and converts it into one like as | |
951 | returned by <<bfd_openr>>. It does this by writing the | |
952 | contents out to the memory buffer, then reversing the | |
953 | direction. | |
954 | ||
b34976b6 | 955 | <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. */ |
252b5132 | 956 | |
0a1b45a2 | 957 | bool |
c58b9523 | 958 | bfd_make_readable (bfd *abfd) |
252b5132 RH |
959 | { |
960 | if (abfd->direction != write_direction || !(abfd->flags & BFD_IN_MEMORY)) | |
961 | { | |
962 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 963 | return false; |
252b5132 RH |
964 | } |
965 | ||
966 | if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd))) | |
0a1b45a2 | 967 | return false; |
252b5132 RH |
968 | |
969 | if (! BFD_SEND (abfd, _close_and_cleanup, (abfd))) | |
0a1b45a2 | 970 | return false; |
252b5132 | 971 | |
252b5132 RH |
972 | abfd->arch_info = &bfd_default_arch_struct; |
973 | ||
974 | abfd->where = 0; | |
252b5132 | 975 | abfd->format = bfd_unknown; |
c58b9523 | 976 | abfd->my_archive = NULL; |
dc810e39 | 977 | abfd->origin = 0; |
0a1b45a2 AM |
978 | abfd->opened_once = false; |
979 | abfd->output_has_begun = false; | |
252b5132 | 980 | abfd->section_count = 0; |
c58b9523 | 981 | abfd->usrdata = NULL; |
0a1b45a2 | 982 | abfd->cacheable = false; |
9e2278f5 | 983 | abfd->flags |= BFD_IN_MEMORY; |
0a1b45a2 | 984 | abfd->mtime_set = false; |
252b5132 | 985 | |
0a1b45a2 | 986 | abfd->target_defaulted = true; |
252b5132 RH |
987 | abfd->direction = read_direction; |
988 | abfd->sections = 0; | |
989 | abfd->symcount = 0; | |
990 | abfd->outsymbols = 0; | |
991 | abfd->tdata.any = 0; | |
87d20657 | 992 | abfd->size = 0; |
252b5132 | 993 | |
e54fdaa5 AM |
994 | bfd_section_list_clear (abfd); |
995 | bfd_check_format (abfd, bfd_object); | |
252b5132 | 996 | |
0a1b45a2 | 997 | return true; |
252b5132 RH |
998 | } |
999 | ||
1000 | /* | |
59a9808d | 1001 | FUNCTION |
252b5132 RH |
1002 | bfd_alloc |
1003 | ||
1004 | SYNOPSIS | |
0fdea5ce | 1005 | void *bfd_alloc (bfd *abfd, bfd_size_type wanted); |
252b5132 RH |
1006 | |
1007 | DESCRIPTION | |
1008 | Allocate a block of @var{wanted} bytes of memory attached to | |
1009 | <<abfd>> and return a pointer to it. | |
1010 | */ | |
1011 | ||
c58b9523 AM |
1012 | void * |
1013 | bfd_alloc (bfd *abfd, bfd_size_type size) | |
252b5132 | 1014 | { |
c58b9523 | 1015 | void *ret; |
36e9d67b | 1016 | unsigned long ul_size = (unsigned long) size; |
252b5132 | 1017 | |
36e9d67b | 1018 | if (size != ul_size |
db6b071a NC |
1019 | /* Note - although objalloc_alloc takes an unsigned long as its |
1020 | argument, internally the size is treated as a signed long. This can | |
1021 | lead to problems where, for example, a request to allocate -1 bytes | |
1022 | can result in just 1 byte being allocated, rather than | |
1023 | ((unsigned long) -1) bytes. Also memory checkers will often | |
1024 | complain about attempts to allocate a negative amount of memory. | |
1025 | So to stop these problems we fail if the size is negative. */ | |
1026 | || ((signed long) ul_size) < 0) | |
dc810e39 AM |
1027 | { |
1028 | bfd_set_error (bfd_error_no_memory); | |
1029 | return NULL; | |
1030 | } | |
db6b071a | 1031 | |
36e9d67b | 1032 | ret = objalloc_alloc ((struct objalloc *) abfd->memory, ul_size); |
252b5132 RH |
1033 | if (ret == NULL) |
1034 | bfd_set_error (bfd_error_no_memory); | |
a8dde0a2 L |
1035 | else |
1036 | abfd->alloc_size += size; | |
252b5132 RH |
1037 | return ret; |
1038 | } | |
1039 | ||
c3e8c140 | 1040 | /* |
59a9808d | 1041 | FUNCTION |
c3e8c140 BE |
1042 | bfd_zalloc |
1043 | ||
1044 | SYNOPSIS | |
1045 | void *bfd_zalloc (bfd *abfd, bfd_size_type wanted); | |
1046 | ||
1047 | DESCRIPTION | |
1048 | Allocate a block of @var{wanted} bytes of zeroed memory | |
1049 | attached to <<abfd>> and return a pointer to it. | |
1050 | */ | |
1051 | ||
c58b9523 AM |
1052 | void * |
1053 | bfd_zalloc (bfd *abfd, bfd_size_type size) | |
252b5132 | 1054 | { |
c58b9523 | 1055 | void *res; |
252b5132 RH |
1056 | |
1057 | res = bfd_alloc (abfd, size); | |
1058 | if (res) | |
dc810e39 | 1059 | memset (res, 0, (size_t) size); |
252b5132 RH |
1060 | return res; |
1061 | } | |
1062 | ||
73e87d70 AM |
1063 | /* Free a block allocated for a BFD. |
1064 | Note: Also frees all more recently allocated blocks! */ | |
252b5132 RH |
1065 | |
1066 | void | |
c58b9523 | 1067 | bfd_release (bfd *abfd, void *block) |
252b5132 RH |
1068 | { |
1069 | objalloc_free_block ((struct objalloc *) abfd->memory, block); | |
1070 | } | |
31f7ba04 NC |
1071 | |
1072 | ||
f12123c0 AM |
1073 | /* |
1074 | GNU Extension: separate debug-info files | |
1075 | ||
31f7ba04 NC |
1076 | The idea here is that a special section called .gnu_debuglink might be |
1077 | embedded in a binary file, which indicates that some *other* file | |
1078 | contains the real debugging information. This special section contains a | |
1079 | filename and CRC32 checksum, which we read and resolve to another file, | |
1080 | if it exists. | |
1081 | ||
1082 | This facilitates "optional" provision of debugging information, without | |
1083 | having to provide two complete copies of every binary object (with and | |
95e34fb4 NC |
1084 | without debug symbols). */ |
1085 | ||
1086 | #define GNU_DEBUGLINK ".gnu_debuglink" | |
1087 | #define GNU_DEBUGALTLINK ".gnu_debugaltlink" | |
31f7ba04 | 1088 | |
31f7ba04 | 1089 | /* |
2593f09a NC |
1090 | FUNCTION |
1091 | bfd_calc_gnu_debuglink_crc32 | |
31f7ba04 NC |
1092 | |
1093 | SYNOPSIS | |
c58b9523 AM |
1094 | unsigned long bfd_calc_gnu_debuglink_crc32 |
1095 | (unsigned long crc, const unsigned char *buf, bfd_size_type len); | |
31f7ba04 NC |
1096 | |
1097 | DESCRIPTION | |
2593f09a NC |
1098 | Computes a CRC value as used in the .gnu_debuglink section. |
1099 | Advances the previously computed @var{crc} value by computing | |
1100 | and adding in the crc32 for @var{len} bytes of @var{buf}. | |
1101 | ||
2593f09a | 1102 | Return the updated CRC32 value. |
f12123c0 | 1103 | */ |
31f7ba04 | 1104 | |
2593f09a | 1105 | unsigned long |
c58b9523 AM |
1106 | bfd_calc_gnu_debuglink_crc32 (unsigned long crc, |
1107 | const unsigned char *buf, | |
1108 | bfd_size_type len) | |
31f7ba04 NC |
1109 | { |
1110 | static const unsigned long crc32_table[256] = | |
1111 | { | |
1112 | 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, | |
1113 | 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, | |
1114 | 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, | |
1115 | 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, | |
1116 | 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, | |
1117 | 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, | |
1118 | 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, | |
1119 | 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, | |
1120 | 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, | |
1121 | 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, | |
1122 | 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, | |
1123 | 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, | |
1124 | 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, | |
1125 | 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, | |
1126 | 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, | |
1127 | 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, | |
1128 | 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, | |
1129 | 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, | |
1130 | 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, | |
1131 | 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, | |
1132 | 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, | |
1133 | 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, | |
1134 | 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, | |
1135 | 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, | |
1136 | 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, | |
1137 | 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, | |
1138 | 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, | |
1139 | 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, | |
1140 | 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, | |
1141 | 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, | |
1142 | 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, | |
1143 | 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, | |
1144 | 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, | |
1145 | 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, | |
1146 | 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, | |
1147 | 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, | |
1148 | 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, | |
1149 | 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, | |
1150 | 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, | |
1151 | 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, | |
1152 | 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, | |
1153 | 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, | |
1154 | 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, | |
1155 | 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, | |
1156 | 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, | |
1157 | 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, | |
1158 | 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, | |
1159 | 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, | |
1160 | 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, | |
1161 | 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, | |
1162 | 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, | |
1163 | 0x2d02ef8d | |
1164 | }; | |
1165 | const unsigned char *end; | |
1166 | ||
1167 | crc = ~crc & 0xffffffff; | |
1168 | for (end = buf + len; buf < end; ++ buf) | |
1169 | crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8); | |
5bb3703f | 1170 | return ~crc & 0xffffffff; |
31f7ba04 NC |
1171 | } |
1172 | ||
1173 | ||
2070491c TT |
1174 | /* Extracts the filename and CRC32 value for any separate debug |
1175 | information file associated with @var{abfd}. | |
49f4617b | 1176 | |
2070491c TT |
1177 | The @var{crc32_out} parameter is an untyped pointer because |
1178 | this routine is used as a @code{get_func_type} function, but it | |
1179 | is expected to be an unsigned long pointer. | |
49f4617b | 1180 | |
2070491c TT |
1181 | Returns the filename of the associated debug information file, |
1182 | or NULL if there is no such file. If the filename was found | |
1183 | then the contents of @var{crc32_out} are updated to hold the | |
1184 | corresponding CRC32 value for the file. | |
49f4617b | 1185 | |
2070491c TT |
1186 | The returned filename is allocated with @code{malloc}; freeing |
1187 | it is the responsibility of the caller. */ | |
31f7ba04 | 1188 | |
49f4617b PA |
1189 | static char * |
1190 | bfd_get_debug_link_info_1 (bfd *abfd, void *crc32_out) | |
31f7ba04 | 1191 | { |
eea6121a | 1192 | asection *sect; |
49f4617b | 1193 | unsigned long *crc32 = (unsigned long *) crc32_out; |
eea6121a | 1194 | bfd_byte *contents; |
470c009b | 1195 | unsigned int crc_offset; |
f075ee0c | 1196 | char *name; |
64e234d4 | 1197 | bfd_size_type size; |
b03202e3 | 1198 | ufile_ptr file_size; |
31f7ba04 NC |
1199 | |
1200 | BFD_ASSERT (abfd); | |
1201 | BFD_ASSERT (crc32_out); | |
1202 | ||
2593f09a | 1203 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK); |
31f7ba04 NC |
1204 | |
1205 | if (sect == NULL) | |
1206 | return NULL; | |
1207 | ||
fd361982 | 1208 | size = bfd_section_size (sect); |
b03202e3 | 1209 | file_size = bfd_get_size (abfd); |
64e234d4 NC |
1210 | |
1211 | /* PR 22794: Make sure that the section has a reasonable size. */ | |
b03202e3 | 1212 | if (size < 8 || (file_size != 0 && size >= file_size)) |
64e234d4 NC |
1213 | return NULL; |
1214 | ||
eea6121a | 1215 | if (!bfd_malloc_and_get_section (abfd, sect, &contents)) |
31f7ba04 | 1216 | { |
c9594989 | 1217 | free (contents); |
31f7ba04 NC |
1218 | return NULL; |
1219 | } | |
1220 | ||
470c009b | 1221 | /* CRC value is stored after the filename, aligned up to 4 bytes. */ |
f075ee0c | 1222 | name = (char *) contents; |
64e234d4 NC |
1223 | /* PR 17597: Avoid reading off the end of the buffer. */ |
1224 | crc_offset = strnlen (name, size) + 1; | |
31f7ba04 | 1225 | crc_offset = (crc_offset + 3) & ~3; |
64e234d4 | 1226 | if (crc_offset + 4 > size) |
470c009b | 1227 | return NULL; |
31f7ba04 | 1228 | |
49f4617b | 1229 | *crc32 = bfd_get_32 (abfd, contents + crc_offset); |
f075ee0c | 1230 | return name; |
31f7ba04 NC |
1231 | } |
1232 | ||
49f4617b PA |
1233 | |
1234 | /* | |
1235 | FUNCTION | |
1236 | bfd_get_debug_link_info | |
1237 | ||
1238 | SYNOPSIS | |
1239 | char *bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out); | |
1240 | ||
1241 | DESCRIPTION | |
1242 | Extracts the filename and CRC32 value for any separate debug | |
1243 | information file associated with @var{abfd}. | |
1244 | ||
f370ae88 TT |
1245 | Returns the filename of the associated debug information file, |
1246 | or NULL if there is no such file. If the filename was found | |
1247 | then the contents of @var{crc32_out} are updated to hold the | |
1248 | corresponding CRC32 value for the file. | |
49f4617b PA |
1249 | |
1250 | The returned filename is allocated with @code{malloc}; freeing | |
1251 | it is the responsibility of the caller. | |
1252 | */ | |
1253 | ||
1254 | char * | |
1255 | bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out) | |
1256 | { | |
1257 | return bfd_get_debug_link_info_1 (abfd, crc32_out); | |
1258 | } | |
1259 | ||
95e34fb4 NC |
1260 | /* |
1261 | FUNCTION | |
1262 | bfd_get_alt_debug_link_info | |
1263 | ||
1264 | SYNOPSIS | |
acd13123 TT |
1265 | char *bfd_get_alt_debug_link_info (bfd * abfd, |
1266 | bfd_size_type *buildid_len, | |
07d6d2b8 | 1267 | bfd_byte **buildid_out); |
95e34fb4 NC |
1268 | |
1269 | DESCRIPTION | |
1270 | Fetch the filename and BuildID value for any alternate debuginfo | |
1271 | associated with @var{abfd}. Return NULL if no such info found, | |
dc294be5 TT |
1272 | otherwise return filename and update @var{buildid_len} and |
1273 | @var{buildid_out}. The returned filename and build_id are | |
49f4617b PA |
1274 | allocated with @code{malloc}; freeing them is the responsibility |
1275 | of the caller. | |
95e34fb4 NC |
1276 | */ |
1277 | ||
1278 | char * | |
acd13123 | 1279 | bfd_get_alt_debug_link_info (bfd * abfd, bfd_size_type *buildid_len, |
dc294be5 | 1280 | bfd_byte **buildid_out) |
95e34fb4 NC |
1281 | { |
1282 | asection *sect; | |
1283 | bfd_byte *contents; | |
470c009b | 1284 | unsigned int buildid_offset; |
95e34fb4 | 1285 | char *name; |
64e234d4 | 1286 | bfd_size_type size; |
b03202e3 | 1287 | ufile_ptr file_size; |
95e34fb4 NC |
1288 | |
1289 | BFD_ASSERT (abfd); | |
dc294be5 | 1290 | BFD_ASSERT (buildid_len); |
95e34fb4 NC |
1291 | BFD_ASSERT (buildid_out); |
1292 | ||
1293 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGALTLINK); | |
1294 | ||
1295 | if (sect == NULL) | |
1296 | return NULL; | |
1297 | ||
fd361982 | 1298 | size = bfd_section_size (sect); |
b03202e3 AM |
1299 | file_size = bfd_get_size (abfd); |
1300 | if (size < 8 || (file_size != 0 && size >= file_size)) | |
64e234d4 NC |
1301 | return NULL; |
1302 | ||
95e34fb4 NC |
1303 | if (!bfd_malloc_and_get_section (abfd, sect, & contents)) |
1304 | { | |
c9594989 | 1305 | free (contents); |
95e34fb4 NC |
1306 | return NULL; |
1307 | } | |
1308 | ||
dc294be5 | 1309 | /* BuildID value is stored after the filename. */ |
95e34fb4 | 1310 | name = (char *) contents; |
64e234d4 | 1311 | buildid_offset = strnlen (name, size) + 1; |
fd361982 | 1312 | if (buildid_offset >= bfd_section_size (sect)) |
470c009b | 1313 | return NULL; |
95e34fb4 | 1314 | |
64e234d4 | 1315 | *buildid_len = size - buildid_offset; |
dc294be5 TT |
1316 | *buildid_out = bfd_malloc (*buildid_len); |
1317 | memcpy (*buildid_out, contents + buildid_offset, *buildid_len); | |
95e34fb4 NC |
1318 | |
1319 | return name; | |
1320 | } | |
1321 | ||
2070491c TT |
1322 | /* Checks to see if @var{name} is a file and if its contents match |
1323 | @var{crc32}, which is a pointer to an @code{unsigned long} | |
1324 | containing a CRC32. | |
49f4617b | 1325 | |
2070491c TT |
1326 | The @var{crc32_p} parameter is an untyped pointer because this |
1327 | routine is used as a @code{check_func_type} function. */ | |
31f7ba04 | 1328 | |
0a1b45a2 | 1329 | static bool |
49f4617b | 1330 | separate_debug_file_exists (const char *name, void *crc32_p) |
31f7ba04 | 1331 | { |
7fbd5f4e | 1332 | unsigned char buffer[8 * 1024]; |
31f7ba04 | 1333 | unsigned long file_crc = 0; |
fed590bb | 1334 | FILE *f; |
2593f09a | 1335 | bfd_size_type count; |
49f4617b | 1336 | unsigned long crc; |
31f7ba04 NC |
1337 | |
1338 | BFD_ASSERT (name); | |
49f4617b PA |
1339 | BFD_ASSERT (crc32_p); |
1340 | ||
1341 | crc = *(unsigned long *) crc32_p; | |
31f7ba04 | 1342 | |
c7c3d11b | 1343 | f = _bfd_real_fopen (name, FOPEN_RB); |
fed590bb | 1344 | if (f == NULL) |
0a1b45a2 | 1345 | return false; |
31f7ba04 | 1346 | |
fed590bb | 1347 | while ((count = fread (buffer, 1, sizeof (buffer), f)) > 0) |
2593f09a | 1348 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); |
31f7ba04 | 1349 | |
fed590bb | 1350 | fclose (f); |
31f7ba04 NC |
1351 | |
1352 | return crc == file_crc; | |
1353 | } | |
1354 | ||
2070491c | 1355 | /* Checks to see if @var{name} is a file. */ |
95e34fb4 | 1356 | |
0a1b45a2 | 1357 | static bool |
49f4617b | 1358 | separate_alt_debug_file_exists (const char *name, void *unused ATTRIBUTE_UNUSED) |
95e34fb4 NC |
1359 | { |
1360 | FILE *f; | |
1361 | ||
1362 | BFD_ASSERT (name); | |
1363 | ||
c7c3d11b | 1364 | f = _bfd_real_fopen (name, FOPEN_RB); |
95e34fb4 | 1365 | if (f == NULL) |
0a1b45a2 | 1366 | return false; |
95e34fb4 | 1367 | |
95e34fb4 NC |
1368 | fclose (f); |
1369 | ||
0a1b45a2 | 1370 | return true; |
95e34fb4 | 1371 | } |
31f7ba04 | 1372 | |
2070491c | 1373 | /* Searches for a debug information file corresponding to @var{abfd}. |
31f7ba04 | 1374 | |
2070491c TT |
1375 | The name of the separate debug info file is returned by the |
1376 | @var{get} function. This function scans various fixed locations | |
1377 | in the filesystem, including the file tree rooted at @var{dir}. | |
1378 | If the @var{include_dirs} parameter is true then the directory | |
1379 | components of @var{abfd}'s filename will be included in the | |
1380 | searched locations. | |
31f7ba04 | 1381 | |
2070491c TT |
1382 | @var{data} is passed unmodified to the @var{get} and @var{check} |
1383 | functions. It is generally used to implement build-id-like | |
1384 | matching in the callback functions. | |
1385 | ||
1386 | Returns the filename of the first file to be found which | |
1387 | receives a TRUE result from the @var{check} function. | |
1388 | Returns NULL if no valid file could be found. */ | |
31f7ba04 | 1389 | |
0a1b45a2 AM |
1390 | typedef char * (*get_func_type) (bfd *, void *); |
1391 | typedef bool (*check_func_type) (const char *, void *); | |
95e34fb4 | 1392 | |
31f7ba04 | 1393 | static char * |
0a1b45a2 AM |
1394 | find_separate_debug_file (bfd *abfd, |
1395 | const char *debug_file_directory, | |
1396 | bool include_dirs, | |
1397 | get_func_type get_func, | |
49f4617b | 1398 | check_func_type check_func, |
0a1b45a2 | 1399 | void *func_data) |
31f7ba04 | 1400 | { |
91d6fa6a | 1401 | char *base; |
31f7ba04 NC |
1402 | char *dir; |
1403 | char *debugfile; | |
91910cdd | 1404 | char *canon_dir; |
3ea6b9a5 | 1405 | size_t dirlen; |
91910cdd | 1406 | size_t canon_dirlen; |
31f7ba04 NC |
1407 | |
1408 | BFD_ASSERT (abfd); | |
1409 | if (debug_file_directory == NULL) | |
1410 | debug_file_directory = "."; | |
1411 | ||
1412 | /* BFD may have been opened from a stream. */ | |
765cf5f6 | 1413 | if (bfd_get_filename (abfd) == NULL) |
3ea6b9a5 AM |
1414 | { |
1415 | bfd_set_error (bfd_error_invalid_operation); | |
1416 | return NULL; | |
1417 | } | |
31f7ba04 | 1418 | |
49f4617b | 1419 | base = get_func (abfd, func_data); |
1b786873 | 1420 | |
91d6fa6a | 1421 | if (base == NULL) |
31f7ba04 | 1422 | return NULL; |
2593f09a | 1423 | |
91d6fa6a | 1424 | if (base[0] == '\0') |
5ed6aba4 | 1425 | { |
91d6fa6a | 1426 | free (base); |
3ea6b9a5 | 1427 | bfd_set_error (bfd_error_no_debug_section); |
5ed6aba4 NC |
1428 | return NULL; |
1429 | } | |
31f7ba04 | 1430 | |
2425a30e NC |
1431 | if (include_dirs) |
1432 | { | |
765cf5f6 AM |
1433 | const char *fname = bfd_get_filename (abfd); |
1434 | for (dirlen = strlen (fname); dirlen > 0; dirlen--) | |
1435 | if (IS_DIR_SEPARATOR (fname[dirlen - 1])) | |
2425a30e | 1436 | break; |
3ea6b9a5 | 1437 | |
2425a30e NC |
1438 | dir = (char *) bfd_malloc (dirlen + 1); |
1439 | if (dir == NULL) | |
1440 | { | |
1441 | free (base); | |
1442 | return NULL; | |
1443 | } | |
765cf5f6 | 1444 | memcpy (dir, fname, dirlen); |
2425a30e NC |
1445 | dir[dirlen] = '\0'; |
1446 | } | |
1447 | else | |
2593f09a | 1448 | { |
2425a30e NC |
1449 | dir = (char *) bfd_malloc (1); |
1450 | * dir = 0; | |
1451 | dirlen = 0; | |
2593f09a | 1452 | } |
3ea6b9a5 | 1453 | |
91910cdd AS |
1454 | /* Compute the canonical name of the bfd object with all symbolic links |
1455 | resolved, for use in the global debugfile directory. */ | |
765cf5f6 | 1456 | canon_dir = lrealpath (bfd_get_filename (abfd)); |
91910cdd AS |
1457 | for (canon_dirlen = strlen (canon_dir); canon_dirlen > 0; canon_dirlen--) |
1458 | if (IS_DIR_SEPARATOR (canon_dir[canon_dirlen - 1])) | |
1459 | break; | |
1460 | canon_dir[canon_dirlen] = '\0'; | |
1461 | ||
2425a30e NC |
1462 | #ifndef EXTRA_DEBUG_ROOT1 |
1463 | #define EXTRA_DEBUG_ROOT1 "/usr/lib/debug" | |
1464 | #endif | |
1465 | #ifndef EXTRA_DEBUG_ROOT2 | |
1466 | #define EXTRA_DEBUG_ROOT2 "/usr/lib/debug/usr" | |
49f4617b | 1467 | #endif |
2425a30e | 1468 | |
a50b1753 NC |
1469 | debugfile = (char *) |
1470 | bfd_malloc (strlen (debug_file_directory) + 1 | |
07d6d2b8 AM |
1471 | + (canon_dirlen > dirlen ? canon_dirlen : dirlen) |
1472 | + strlen (".debug/") | |
2425a30e NC |
1473 | #ifdef EXTRA_DEBUG_ROOT1 |
1474 | + strlen (EXTRA_DEBUG_ROOT1) | |
1475 | #endif | |
1476 | #ifdef EXTRA_DEBUG_ROOT2 | |
1477 | + strlen (EXTRA_DEBUG_ROOT2) | |
1478 | #endif | |
07d6d2b8 AM |
1479 | + strlen (base) |
1480 | + 1); | |
2593f09a | 1481 | if (debugfile == NULL) |
95e34fb4 | 1482 | goto found; /* Actually this returns NULL. */ |
31f7ba04 | 1483 | |
2425a30e | 1484 | /* First try in the same directory as the original file. |
31f7ba04 | 1485 | |
2425a30e NC |
1486 | FIXME: Strictly speaking if we are using the build-id method, |
1487 | (ie include_dirs == FALSE) then we should only check absolute | |
1488 | paths, not relative ones like this one (and the next one). | |
1489 | The check is left in however as this allows the binutils | |
1490 | testsuite to exercise this feature without having to install | |
1491 | a file into the root filesystem. (See binutils/testsuite/ | |
1492 | binutils-all/objdump.exp for the test). */ | |
1493 | sprintf (debugfile, "%s%s", dir, base); | |
49f4617b | 1494 | if (check_func (debugfile, func_data)) |
95e34fb4 | 1495 | goto found; |
31f7ba04 NC |
1496 | |
1497 | /* Then try in a subdirectory called .debug. */ | |
2425a30e | 1498 | sprintf (debugfile, "%s.debug/%s", dir, base); |
49f4617b | 1499 | if (check_func (debugfile, func_data)) |
2425a30e | 1500 | goto found; |
31f7ba04 | 1501 | |
2425a30e NC |
1502 | #ifdef EXTRA_DEBUG_ROOT1 |
1503 | /* Try the first extra debug file root. */ | |
1504 | sprintf (debugfile, "%s%s%s", EXTRA_DEBUG_ROOT1, | |
1505 | include_dirs ? canon_dir : "/", base); | |
49f4617b | 1506 | if (check_func (debugfile, func_data)) |
95e34fb4 | 1507 | goto found; |
2425a30e | 1508 | #endif |
31f7ba04 | 1509 | |
2425a30e NC |
1510 | #ifdef EXTRA_DEBUG_ROOT2 |
1511 | /* Try the second extra debug file root. */ | |
1512 | sprintf (debugfile, "%s%s%s", EXTRA_DEBUG_ROOT2, | |
1513 | include_dirs ? canon_dir : "/", base); | |
49f4617b | 1514 | if (check_func (debugfile, func_data)) |
2425a30e NC |
1515 | goto found; |
1516 | #endif | |
49f4617b | 1517 | |
31f7ba04 NC |
1518 | /* Then try in the global debugfile directory. */ |
1519 | strcpy (debugfile, debug_file_directory); | |
91910cdd | 1520 | dirlen = strlen (debug_file_directory) - 1; |
2425a30e NC |
1521 | if (include_dirs) |
1522 | { | |
1523 | if (dirlen > 0 | |
1524 | && debug_file_directory[dirlen] != '/' | |
1525 | && canon_dir[0] != '/') | |
1526 | strcat (debugfile, "/"); | |
1527 | strcat (debugfile, canon_dir); | |
1528 | } | |
1529 | else | |
1530 | { | |
1531 | if (dirlen > 0 && debug_file_directory[dirlen] != '/') | |
1532 | strcat (debugfile, "/"); | |
1533 | } | |
91d6fa6a | 1534 | strcat (debugfile, base); |
31f7ba04 | 1535 | |
49f4617b | 1536 | if (check_func (debugfile, func_data)) |
95e34fb4 | 1537 | goto found; |
31f7ba04 | 1538 | |
95e34fb4 | 1539 | /* Failed to find the file. */ |
31f7ba04 | 1540 | free (debugfile); |
95e34fb4 NC |
1541 | debugfile = NULL; |
1542 | ||
1543 | found: | |
91d6fa6a | 1544 | free (base); |
31f7ba04 | 1545 | free (dir); |
91910cdd | 1546 | free (canon_dir); |
95e34fb4 | 1547 | return debugfile; |
31f7ba04 NC |
1548 | } |
1549 | ||
31f7ba04 NC |
1550 | /* |
1551 | FUNCTION | |
1552 | bfd_follow_gnu_debuglink | |
1553 | ||
1554 | SYNOPSIS | |
c58b9523 | 1555 | char *bfd_follow_gnu_debuglink (bfd *abfd, const char *dir); |
31f7ba04 NC |
1556 | |
1557 | DESCRIPTION | |
31f7ba04 | 1558 | Takes a BFD and searches it for a .gnu_debuglink section. If this |
28d39d1a NC |
1559 | section is found, it examines the section for the name and checksum |
1560 | of a '.debug' file containing auxiliary debugging information. It | |
1561 | then searches the filesystem for this .debug file in some standard | |
31f7ba04 | 1562 | locations, including the directory tree rooted at @var{dir}, and if |
28d39d1a NC |
1563 | found returns the full filename. |
1564 | ||
2425a30e NC |
1565 | If @var{dir} is NULL, the search will take place starting at |
1566 | the current directory. | |
31f7ba04 | 1567 | |
f370ae88 TT |
1568 | Returns <<NULL>> on any errors or failure to locate the .debug |
1569 | file, otherwise a pointer to a heap-allocated string | |
1570 | containing the filename. The caller is responsible for | |
1571 | freeing this string. | |
31f7ba04 NC |
1572 | */ |
1573 | ||
1574 | char * | |
c58b9523 | 1575 | bfd_follow_gnu_debuglink (bfd *abfd, const char *dir) |
31f7ba04 | 1576 | { |
49f4617b PA |
1577 | unsigned long crc32; |
1578 | ||
0a1b45a2 | 1579 | return find_separate_debug_file (abfd, dir, true, |
49f4617b PA |
1580 | bfd_get_debug_link_info_1, |
1581 | separate_debug_file_exists, &crc32); | |
95e34fb4 NC |
1582 | } |
1583 | ||
49f4617b PA |
1584 | /* Helper for bfd_follow_gnu_debugaltlink. It just returns the name |
1585 | of the separate debug file. */ | |
dc294be5 TT |
1586 | |
1587 | static char * | |
49f4617b | 1588 | get_alt_debug_link_info_shim (bfd * abfd, void *unused ATTRIBUTE_UNUSED) |
dc294be5 | 1589 | { |
6e114b15 | 1590 | bfd_size_type len; |
dc294be5 TT |
1591 | bfd_byte *buildid = NULL; |
1592 | char *result = bfd_get_alt_debug_link_info (abfd, &len, &buildid); | |
1593 | ||
dc294be5 TT |
1594 | free (buildid); |
1595 | ||
1596 | return result; | |
1597 | } | |
1598 | ||
95e34fb4 NC |
1599 | /* |
1600 | FUNCTION | |
1601 | bfd_follow_gnu_debugaltlink | |
1602 | ||
1603 | SYNOPSIS | |
1604 | char *bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir); | |
1605 | ||
1606 | DESCRIPTION | |
95e34fb4 NC |
1607 | Takes a BFD and searches it for a .gnu_debugaltlink section. If this |
1608 | section is found, it examines the section for the name of a file | |
2425a30e | 1609 | containing auxiliary debugging information. It then searches the |
95e34fb4 NC |
1610 | filesystem for this file in a set of standard locations, including |
1611 | the directory tree rooted at @var{dir}, and if found returns the | |
1612 | full filename. | |
1613 | ||
2425a30e NC |
1614 | If @var{dir} is NULL, the search will take place starting at |
1615 | the current directory. | |
95e34fb4 | 1616 | |
f370ae88 TT |
1617 | Returns <<NULL>> on any errors or failure to locate the debug |
1618 | file, otherwise a pointer to a heap-allocated string | |
1619 | containing the filename. The caller is responsible for | |
1620 | freeing this string. | |
95e34fb4 NC |
1621 | */ |
1622 | ||
1623 | char * | |
1624 | bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir) | |
1625 | { | |
0a1b45a2 | 1626 | return find_separate_debug_file (abfd, dir, true, |
dc294be5 | 1627 | get_alt_debug_link_info_shim, |
49f4617b PA |
1628 | separate_alt_debug_file_exists, |
1629 | NULL); | |
31f7ba04 | 1630 | } |
2593f09a NC |
1631 | |
1632 | /* | |
1633 | FUNCTION | |
e7c81c25 | 1634 | bfd_create_gnu_debuglink_section |
2593f09a NC |
1635 | |
1636 | SYNOPSIS | |
198beae2 | 1637 | struct bfd_section *bfd_create_gnu_debuglink_section |
c58b9523 | 1638 | (bfd *abfd, const char *filename); |
2593f09a NC |
1639 | |
1640 | DESCRIPTION | |
49f4617b PA |
1641 | Takes a @var{BFD} and adds a .gnu_debuglink section to it. The |
1642 | section is sized to be big enough to contain a link to the specified | |
1643 | @var{filename}. | |
e7c81c25 | 1644 | |
49f4617b PA |
1645 | A pointer to the new section is returned if all is ok. Otherwise |
1646 | <<NULL>> is returned and bfd_error is set. | |
e7c81c25 NC |
1647 | */ |
1648 | ||
1649 | asection * | |
c58b9523 | 1650 | bfd_create_gnu_debuglink_section (bfd *abfd, const char *filename) |
e7c81c25 | 1651 | { |
c58b9523 AM |
1652 | asection *sect; |
1653 | bfd_size_type debuglink_size; | |
117ed4f8 | 1654 | flagword flags; |
e7c81c25 NC |
1655 | |
1656 | if (abfd == NULL || filename == NULL) | |
1657 | { | |
1658 | bfd_set_error (bfd_error_invalid_operation); | |
1659 | return NULL; | |
1660 | } | |
1661 | ||
1662 | /* Strip off any path components in filename. */ | |
1663 | filename = lbasename (filename); | |
f12123c0 | 1664 | |
e7c81c25 NC |
1665 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK); |
1666 | if (sect) | |
1667 | { | |
1668 | /* Section already exists. */ | |
1669 | bfd_set_error (bfd_error_invalid_operation); | |
1670 | return NULL; | |
1671 | } | |
1672 | ||
117ed4f8 AM |
1673 | flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING; |
1674 | sect = bfd_make_section_with_flags (abfd, GNU_DEBUGLINK, flags); | |
e7c81c25 NC |
1675 | if (sect == NULL) |
1676 | return NULL; | |
1677 | ||
758d96d8 NC |
1678 | /* Compute the size of the section. Allow for the CRC after the filename, |
1679 | and padding so that it will start on a 4-byte boundary. */ | |
e7c81c25 NC |
1680 | debuglink_size = strlen (filename) + 1; |
1681 | debuglink_size += 3; | |
1682 | debuglink_size &= ~3; | |
1683 | debuglink_size += 4; | |
1684 | ||
fd361982 | 1685 | if (!bfd_set_section_size (sect, debuglink_size)) |
e7c81c25 NC |
1686 | /* XXX Should we delete the section from the bfd ? */ |
1687 | return NULL; | |
f12123c0 | 1688 | |
758d96d8 NC |
1689 | /* PR 21193: Ensure that the section has 4-byte alignment for the CRC. |
1690 | Note - despite the name of the function being called, we are | |
1691 | setting an alignment power, not a byte alignment value. */ | |
fd361982 | 1692 | bfd_set_section_alignment (sect, 2); |
758d96d8 | 1693 | |
e7c81c25 NC |
1694 | return sect; |
1695 | } | |
1696 | ||
1697 | ||
1698 | /* | |
1699 | FUNCTION | |
1700 | bfd_fill_in_gnu_debuglink_section | |
1701 | ||
1702 | SYNOPSIS | |
0a1b45a2 | 1703 | bool bfd_fill_in_gnu_debuglink_section |
198beae2 | 1704 | (bfd *abfd, struct bfd_section *sect, const char *filename); |
e7c81c25 NC |
1705 | |
1706 | DESCRIPTION | |
e7c81c25 NC |
1707 | Takes a @var{BFD} and containing a .gnu_debuglink section @var{SECT} |
1708 | and fills in the contents of the section to contain a link to the | |
1709 | specified @var{filename}. The filename should be relative to the | |
1710 | current directory. | |
2593f09a | 1711 | |
2593f09a | 1712 | <<TRUE>> is returned if all is ok. Otherwise <<FALSE>> is returned |
f12123c0 | 1713 | and bfd_error is set. |
2593f09a NC |
1714 | */ |
1715 | ||
0a1b45a2 | 1716 | bool |
c58b9523 | 1717 | bfd_fill_in_gnu_debuglink_section (bfd *abfd, |
198beae2 | 1718 | struct bfd_section *sect, |
c58b9523 | 1719 | const char *filename) |
2593f09a | 1720 | { |
2593f09a NC |
1721 | bfd_size_type debuglink_size; |
1722 | unsigned long crc32; | |
1723 | char * contents; | |
1724 | bfd_size_type crc_offset; | |
1725 | FILE * handle; | |
7fbd5f4e | 1726 | unsigned char buffer[8 * 1024]; |
2593f09a | 1727 | size_t count; |
3ea6b9a5 | 1728 | size_t filelen; |
2593f09a | 1729 | |
e7c81c25 | 1730 | if (abfd == NULL || sect == NULL || filename == NULL) |
2593f09a NC |
1731 | { |
1732 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 1733 | return false; |
2593f09a NC |
1734 | } |
1735 | ||
1736 | /* Make sure that we can read the file. | |
1737 | XXX - Should we attempt to locate the debug info file using the same | |
1738 | algorithm as gdb ? At the moment, since we are creating the | |
1739 | .gnu_debuglink section, we insist upon the user providing us with a | |
1740 | correct-for-section-creation-time path, but this need not conform to | |
1741 | the gdb location algorithm. */ | |
c7c3d11b | 1742 | handle = _bfd_real_fopen (filename, FOPEN_RB); |
2593f09a NC |
1743 | if (handle == NULL) |
1744 | { | |
1745 | bfd_set_error (bfd_error_system_call); | |
0a1b45a2 | 1746 | return false; |
2593f09a NC |
1747 | } |
1748 | ||
1749 | crc32 = 0; | |
1750 | while ((count = fread (buffer, 1, sizeof buffer, handle)) > 0) | |
1751 | crc32 = bfd_calc_gnu_debuglink_crc32 (crc32, buffer, count); | |
1752 | fclose (handle); | |
1753 | ||
1754 | /* Strip off any path components in filename, | |
1755 | now that we no longer need them. */ | |
1756 | filename = lbasename (filename); | |
f12123c0 | 1757 | |
3ea6b9a5 AM |
1758 | filelen = strlen (filename); |
1759 | debuglink_size = filelen + 1; | |
2593f09a NC |
1760 | debuglink_size += 3; |
1761 | debuglink_size &= ~3; | |
1762 | debuglink_size += 4; | |
1763 | ||
a50b1753 | 1764 | contents = (char *) bfd_malloc (debuglink_size); |
2593f09a NC |
1765 | if (contents == NULL) |
1766 | { | |
1767 | /* XXX Should we delete the section from the bfd ? */ | |
0a1b45a2 | 1768 | return false; |
2593f09a NC |
1769 | } |
1770 | ||
2593f09a | 1771 | crc_offset = debuglink_size - 4; |
3ea6b9a5 AM |
1772 | memcpy (contents, filename, filelen); |
1773 | memset (contents + filelen, 0, crc_offset - filelen); | |
2593f09a | 1774 | |
c58b9523 | 1775 | bfd_put_32 (abfd, crc32, contents + crc_offset); |
2593f09a | 1776 | |
c58b9523 | 1777 | if (! bfd_set_section_contents (abfd, sect, contents, 0, debuglink_size)) |
2593f09a NC |
1778 | { |
1779 | /* XXX Should we delete the section from the bfd ? */ | |
1780 | free (contents); | |
0a1b45a2 | 1781 | return false; |
2593f09a NC |
1782 | } |
1783 | ||
0a1b45a2 | 1784 | return true; |
2593f09a | 1785 | } |
2425a30e | 1786 | |
2070491c TT |
1787 | /* Finds the build-id associated with @var{abfd}. If the build-id is |
1788 | extracted from the note section then a build-id structure is built | |
1789 | for it, using memory allocated to @var{abfd}, and this is then | |
1790 | attached to the @var{abfd}. | |
2425a30e | 1791 | |
2070491c TT |
1792 | Returns a pointer to the build-id structure if a build-id could be |
1793 | found. If no build-id is found NULL is returned and error code is | |
1794 | set. */ | |
2425a30e NC |
1795 | |
1796 | static struct bfd_build_id * | |
1797 | get_build_id (bfd *abfd) | |
1798 | { | |
1799 | struct bfd_build_id *build_id; | |
1800 | Elf_Internal_Note inote; | |
1801 | Elf_External_Note *enote; | |
1802 | bfd_byte *contents; | |
1803 | asection *sect; | |
cfd14a50 | 1804 | bfd_size_type size; |
2425a30e NC |
1805 | |
1806 | BFD_ASSERT (abfd); | |
1807 | ||
1808 | if (abfd->build_id && abfd->build_id->size > 0) | |
1809 | /* Save some time by using the already computed build-id. */ | |
1810 | return (struct bfd_build_id *) abfd->build_id; | |
1811 | ||
1812 | sect = bfd_get_section_by_name (abfd, ".note.gnu.build-id"); | |
1813 | if (sect == NULL) | |
1814 | { | |
1815 | bfd_set_error (bfd_error_no_debug_section); | |
1816 | return NULL; | |
1817 | } | |
1818 | ||
fd361982 | 1819 | size = bfd_section_size (sect); |
2425a30e | 1820 | /* FIXME: Should we support smaller build-id notes ? */ |
cfd14a50 | 1821 | if (size < 0x24) |
2425a30e NC |
1822 | { |
1823 | bfd_set_error (bfd_error_invalid_operation); | |
1824 | return NULL; | |
1825 | } | |
1826 | ||
1827 | if (!bfd_malloc_and_get_section (abfd, sect, & contents)) | |
1828 | { | |
c9594989 | 1829 | free (contents); |
2425a30e NC |
1830 | return NULL; |
1831 | } | |
1832 | ||
cfd14a50 NC |
1833 | /* FIXME: Paranoia - allow for compressed build-id sections. |
1834 | Maybe we should complain if this size is different from | |
1835 | the one obtained above... */ | |
fd361982 | 1836 | size = bfd_section_size (sect); |
cfd14a50 NC |
1837 | if (size < sizeof (Elf_External_Note)) |
1838 | { | |
1839 | bfd_set_error (bfd_error_invalid_operation); | |
1840 | free (contents); | |
1841 | return NULL; | |
1842 | } | |
1843 | ||
2425a30e NC |
1844 | enote = (Elf_External_Note *) contents; |
1845 | inote.type = H_GET_32 (abfd, enote->type); | |
1846 | inote.namesz = H_GET_32 (abfd, enote->namesz); | |
1847 | inote.namedata = enote->name; | |
1848 | inote.descsz = H_GET_32 (abfd, enote->descsz); | |
1849 | inote.descdata = inote.namedata + BFD_ALIGN (inote.namesz, 4); | |
1850 | /* FIXME: Should we check for extra notes in this section ? */ | |
49f4617b | 1851 | |
6077de06 | 1852 | if (inote.descsz <= 0 |
2425a30e NC |
1853 | || inote.type != NT_GNU_BUILD_ID |
1854 | || inote.namesz != 4 /* sizeof "GNU" */ | |
3f3328b8 | 1855 | || !startswith (inote.namedata, "GNU") |
6077de06 | 1856 | || inote.descsz > 0x7ffffffe |
cfd14a50 | 1857 | || size < (12 + BFD_ALIGN (inote.namesz, 4) + inote.descsz)) |
2425a30e NC |
1858 | { |
1859 | free (contents); | |
1860 | bfd_set_error (bfd_error_invalid_operation); | |
1861 | return NULL; | |
1862 | } | |
1863 | ||
1864 | build_id = bfd_alloc (abfd, sizeof (struct bfd_build_id) + inote.descsz); | |
1865 | if (build_id == NULL) | |
1866 | { | |
1867 | free (contents); | |
1868 | return NULL; | |
1869 | } | |
1870 | ||
1871 | build_id->size = inote.descsz; | |
1872 | memcpy (build_id->data, inote.descdata, inote.descsz); | |
1873 | abfd->build_id = build_id; | |
1874 | free (contents); | |
1875 | ||
1876 | return build_id; | |
1877 | } | |
1878 | ||
2070491c TT |
1879 | /* Searches @var{abfd} for a build-id, and then constructs a pathname |
1880 | from it. The path is computed as .build-id/NN/NN+NN.debug where | |
1881 | NNNN+NN is the build-id value as a hexadecimal string. | |
2425a30e | 1882 | |
2070491c TT |
1883 | Returns the constructed filename or NULL upon error. It is the |
1884 | caller's responsibility to free the memory used to hold the | |
1885 | filename. If a filename is returned then the @var{build_id_out_p} | |
1886 | parameter (which points to a @code{struct bfd_build_id} pointer) is | |
1887 | set to a pointer to the build_id structure. */ | |
2425a30e NC |
1888 | |
1889 | static char * | |
49f4617b | 1890 | get_build_id_name (bfd *abfd, void *build_id_out_p) |
2425a30e | 1891 | { |
49f4617b | 1892 | struct bfd_build_id **build_id_out = build_id_out_p; |
2425a30e NC |
1893 | struct bfd_build_id *build_id; |
1894 | char *name; | |
1895 | char *n; | |
1896 | bfd_size_type s; | |
1897 | bfd_byte *d; | |
1898 | ||
765cf5f6 | 1899 | if (abfd == NULL || bfd_get_filename (abfd) == NULL || build_id_out == NULL) |
2425a30e NC |
1900 | { |
1901 | bfd_set_error (bfd_error_invalid_operation); | |
1902 | return NULL; | |
1903 | } | |
1904 | ||
1905 | build_id = get_build_id (abfd); | |
1906 | if (build_id == NULL) | |
1907 | return NULL; | |
1908 | ||
1909 | /* Compute the debug pathname corresponding to the build-id. */ | |
1910 | name = bfd_malloc (strlen (".build-id/") + build_id->size * 2 + 2 + strlen (".debug")); | |
1911 | if (name == NULL) | |
1912 | { | |
1913 | bfd_set_error (bfd_error_no_memory); | |
1914 | return NULL; | |
1915 | } | |
1916 | n = name; | |
1917 | d = build_id->data; | |
1918 | s = build_id->size; | |
1919 | ||
1920 | n += sprintf (n, ".build-id/"); | |
1921 | n += sprintf (n, "%02x", (unsigned) *d++); s--; | |
1922 | n += sprintf (n, "/"); | |
1923 | while (s--) | |
1924 | n += sprintf (n, "%02x", (unsigned) *d++); | |
1925 | n += sprintf (n, ".debug"); | |
1926 | ||
49f4617b | 1927 | *build_id_out = build_id; |
2425a30e NC |
1928 | return name; |
1929 | } | |
1930 | ||
2070491c TT |
1931 | /* Checks to see if @var{name} is a readable file and if its build-id |
1932 | matches @var{buildid}. | |
2425a30e | 1933 | |
2070491c TT |
1934 | Returns TRUE if the file exists, is readable, and contains a |
1935 | build-id which matches the build-id pointed at by @var{build_id_p} | |
1936 | (which is really a @code{struct bfd_build_id **}). */ | |
2425a30e | 1937 | |
0a1b45a2 | 1938 | static bool |
49f4617b | 1939 | check_build_id_file (const char *name, void *buildid_p) |
2425a30e NC |
1940 | { |
1941 | struct bfd_build_id *orig_build_id; | |
1942 | struct bfd_build_id *build_id; | |
1943 | bfd * file; | |
0a1b45a2 | 1944 | bool result; |
2425a30e NC |
1945 | |
1946 | BFD_ASSERT (name); | |
49f4617b | 1947 | BFD_ASSERT (buildid_p); |
2425a30e NC |
1948 | |
1949 | file = bfd_openr (name, NULL); | |
1950 | if (file == NULL) | |
0a1b45a2 | 1951 | return false; |
2425a30e NC |
1952 | |
1953 | /* If the file is an archive, process all of its elements. */ | |
1954 | if (! bfd_check_format (file, bfd_object)) | |
1955 | { | |
1956 | bfd_close (file); | |
0a1b45a2 | 1957 | return false; |
2425a30e | 1958 | } |
49f4617b | 1959 | |
2425a30e NC |
1960 | build_id = get_build_id (file); |
1961 | if (build_id == NULL) | |
1962 | { | |
1963 | bfd_close (file); | |
0a1b45a2 | 1964 | return false; |
2425a30e NC |
1965 | } |
1966 | ||
49f4617b | 1967 | orig_build_id = *(struct bfd_build_id **) buildid_p; |
2425a30e NC |
1968 | |
1969 | result = build_id->size == orig_build_id->size | |
1970 | && memcmp (build_id->data, orig_build_id->data, build_id->size) == 0; | |
1971 | ||
1972 | (void) bfd_close (file); | |
1973 | ||
1974 | return result; | |
1975 | } | |
1976 | ||
1977 | /* | |
1978 | FUNCTION | |
1979 | bfd_follow_build_id_debuglink | |
1980 | ||
1981 | SYNOPSIS | |
1982 | char *bfd_follow_build_id_debuglink (bfd *abfd, const char *dir); | |
1983 | ||
1984 | DESCRIPTION | |
2425a30e NC |
1985 | Takes @var{abfd} and searches it for a .note.gnu.build-id section. |
1986 | If this section is found, it extracts the value of the NT_GNU_BUILD_ID | |
1987 | note, which should be a hexadecimal value @var{NNNN+NN} (for | |
1988 | 32+ hex digits). It then searches the filesystem for a file named | |
1989 | @var{.build-id/NN/NN+NN.debug} in a set of standard locations, | |
1990 | including the directory tree rooted at @var{dir}. The filename | |
1991 | of the first matching file to be found is returned. A matching | |
1992 | file should contain a .note.gnu.build-id section with the same | |
1993 | @var{NNNN+NN} note as @var{abfd}, although this check is currently | |
1994 | not implemented. | |
1995 | ||
1996 | If @var{dir} is NULL, the search will take place starting at | |
1997 | the current directory. | |
1998 | ||
f370ae88 TT |
1999 | Returns <<NULL>> on any errors or failure to locate the debug |
2000 | file, otherwise a pointer to a heap-allocated string | |
2001 | containing the filename. The caller is responsible for | |
2002 | freeing this string. | |
2425a30e NC |
2003 | */ |
2004 | ||
2005 | char * | |
2006 | bfd_follow_build_id_debuglink (bfd *abfd, const char *dir) | |
2007 | { | |
49f4617b PA |
2008 | struct bfd_build_id *build_id; |
2009 | ||
0a1b45a2 | 2010 | return find_separate_debug_file (abfd, dir, false, |
2425a30e | 2011 | get_build_id_name, |
49f4617b | 2012 | check_build_id_file, &build_id); |
2425a30e | 2013 | } |
64b2d4a0 TT |
2014 | |
2015 | /* | |
2016 | FUNCTION | |
2017 | bfd_set_filename | |
2018 | ||
2019 | SYNOPSIS | |
7b958a48 | 2020 | const char *bfd_set_filename (bfd *abfd, const char *filename); |
64b2d4a0 TT |
2021 | |
2022 | DESCRIPTION | |
7b958a48 AM |
2023 | Set the filename of @var{abfd}, copying the FILENAME parameter to |
2024 | bfd_alloc'd memory owned by @var{abfd}. Returns a pointer the | |
2025 | newly allocated name, or NULL if the allocation failed. | |
64b2d4a0 TT |
2026 | */ |
2027 | ||
7b958a48 AM |
2028 | const char * |
2029 | bfd_set_filename (bfd *abfd, const char *filename) | |
64b2d4a0 | 2030 | { |
7b958a48 AM |
2031 | size_t len = strlen (filename) + 1; |
2032 | char *n = bfd_alloc (abfd, len); | |
a6ad7914 AM |
2033 | |
2034 | if (n == NULL) | |
2035 | return NULL; | |
2036 | ||
2037 | if (abfd->filename != NULL) | |
7b958a48 | 2038 | { |
a6ad7914 AM |
2039 | /* PR 29389. If we attempt to rename a file that has been closed due |
2040 | to caching, then we will not be able to reopen it later on. */ | |
2041 | if (abfd->iostream == NULL && (abfd->flags & BFD_CLOSED_BY_CACHE)) | |
2042 | { | |
2043 | bfd_set_error (bfd_error_invalid_operation); | |
2044 | return NULL; | |
2045 | } | |
2046 | ||
2047 | /* Similarly if we attempt to close a renamed file because the | |
2048 | cache is now full, we will not be able to reopen it later on. */ | |
2049 | if (abfd->iostream != NULL) | |
2050 | abfd->cacheable = 0; | |
7b958a48 | 2051 | } |
a6ad7914 AM |
2052 | |
2053 | memcpy (n, filename, len); | |
2054 | abfd->filename = n; | |
2055 | ||
7b958a48 | 2056 | return n; |
64b2d4a0 | 2057 | } |