Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* opncls.c -- open and close a BFD. |
b90efa5b | 2 | Copyright (C) 1990-2015 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" |
252b5132 RH |
28 | |
29 | #ifndef S_IXUSR | |
30 | #define S_IXUSR 0100 /* Execute by owner. */ | |
31 | #endif | |
32 | #ifndef S_IXGRP | |
33 | #define S_IXGRP 0010 /* Execute by group. */ | |
34 | #endif | |
35 | #ifndef S_IXOTH | |
36 | #define S_IXOTH 0001 /* Execute by others. */ | |
37 | #endif | |
38 | ||
fc1cfaa5 | 39 | /* Counters used to initialize the bfd identifier. */ |
52b69c9e | 40 | |
fc1cfaa5 AM |
41 | static unsigned int bfd_id_counter = 0; |
42 | static unsigned int bfd_reserved_id_counter = 0; | |
43 | ||
44 | /* | |
45 | CODE_FRAGMENT | |
46 | .{* Set to N to open the next N BFDs using an alternate id space. *} | |
47 | .extern unsigned int bfd_use_reserved_id; | |
48 | */ | |
49 | unsigned int bfd_use_reserved_id = 0; | |
52b69c9e | 50 | |
252b5132 RH |
51 | /* fdopen is a loser -- we should use stdio exclusively. Unfortunately |
52 | if we do that we can't use fcntl. */ | |
53 | ||
252b5132 RH |
54 | /* Return a new BFD. All BFD's are allocated through this routine. */ |
55 | ||
56 | bfd * | |
c58b9523 | 57 | _bfd_new_bfd (void) |
252b5132 RH |
58 | { |
59 | bfd *nbfd; | |
60 | ||
a50b1753 | 61 | nbfd = (bfd *) bfd_zmalloc (sizeof (bfd)); |
252b5132 RH |
62 | if (nbfd == NULL) |
63 | return NULL; | |
64 | ||
fc1cfaa5 AM |
65 | if (bfd_use_reserved_id) |
66 | { | |
67 | nbfd->id = --bfd_reserved_id_counter; | |
68 | --bfd_use_reserved_id; | |
69 | } | |
70 | else | |
71 | nbfd->id = bfd_id_counter++; | |
52b69c9e | 72 | |
c58b9523 | 73 | nbfd->memory = objalloc_create (); |
252b5132 RH |
74 | if (nbfd->memory == NULL) |
75 | { | |
76 | bfd_set_error (bfd_error_no_memory); | |
73e87d70 | 77 | free (nbfd); |
252b5132 RH |
78 | return NULL; |
79 | } | |
80 | ||
81 | nbfd->arch_info = &bfd_default_arch_struct; | |
82 | ||
28d39d1a | 83 | if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc, |
c9ba0c87 | 84 | sizeof (struct section_hash_entry), 13)) |
73e87d70 AM |
85 | { |
86 | free (nbfd); | |
87 | return NULL; | |
88 | } | |
252b5132 RH |
89 | |
90 | return nbfd; | |
91 | } | |
92 | ||
b374d0f8 AM |
93 | static const struct bfd_iovec opncls_iovec; |
94 | ||
252b5132 RH |
95 | /* Allocate a new BFD as a member of archive OBFD. */ |
96 | ||
97 | bfd * | |
c58b9523 | 98 | _bfd_new_bfd_contained_in (bfd *obfd) |
252b5132 RH |
99 | { |
100 | bfd *nbfd; | |
101 | ||
102 | nbfd = _bfd_new_bfd (); | |
301e3139 AM |
103 | if (nbfd == NULL) |
104 | return NULL; | |
252b5132 | 105 | nbfd->xvec = obfd->xvec; |
40838a72 | 106 | nbfd->iovec = obfd->iovec; |
b374d0f8 AM |
107 | if (obfd->iovec == &opncls_iovec) |
108 | nbfd->iostream = obfd->iostream; | |
252b5132 RH |
109 | nbfd->my_archive = obfd; |
110 | nbfd->direction = read_direction; | |
111 | nbfd->target_defaulted = obfd->target_defaulted; | |
112 | return nbfd; | |
113 | } | |
114 | ||
73e87d70 AM |
115 | /* Delete a BFD. */ |
116 | ||
7b84f8da | 117 | static void |
c58b9523 | 118 | _bfd_delete_bfd (bfd *abfd) |
73e87d70 | 119 | { |
b25e3d87 L |
120 | if (abfd->memory) |
121 | { | |
122 | bfd_hash_table_free (&abfd->section_htab); | |
123 | objalloc_free ((struct objalloc *) abfd->memory); | |
124 | } | |
a988325c | 125 | |
1be5090b NC |
126 | if (abfd->filename) |
127 | free ((char *) abfd->filename); | |
06e7acd7 | 128 | free (abfd->arelt_data); |
73e87d70 AM |
129 | free (abfd); |
130 | } | |
131 | ||
b25e3d87 L |
132 | /* Free objalloc memory. */ |
133 | ||
134 | bfd_boolean | |
135 | _bfd_free_cached_info (bfd *abfd) | |
136 | { | |
137 | if (abfd->memory) | |
138 | { | |
139 | bfd_hash_table_free (&abfd->section_htab); | |
140 | objalloc_free ((struct objalloc *) abfd->memory); | |
141 | ||
142 | abfd->sections = NULL; | |
143 | abfd->section_last = NULL; | |
144 | abfd->outsymbols = NULL; | |
145 | abfd->tdata.any = NULL; | |
146 | abfd->usrdata = NULL; | |
147 | abfd->memory = NULL; | |
148 | } | |
149 | ||
150 | return TRUE; | |
151 | } | |
152 | ||
252b5132 RH |
153 | /* |
154 | SECTION | |
155 | Opening and closing BFDs | |
156 | ||
1b74d094 BW |
157 | SUBSECTION |
158 | Functions for opening and closing | |
252b5132 RH |
159 | */ |
160 | ||
161 | /* | |
162 | FUNCTION | |
2d0123b7 | 163 | bfd_fopen |
252b5132 RH |
164 | |
165 | SYNOPSIS | |
2d0123b7 MM |
166 | bfd *bfd_fopen (const char *filename, const char *target, |
167 | const char *mode, int fd); | |
252b5132 RH |
168 | |
169 | DESCRIPTION | |
2d0123b7 MM |
170 | Open the file @var{filename} with the target @var{target}. |
171 | Return a pointer to the created BFD. If @var{fd} is not -1, | |
172 | then <<fdopen>> is used to open the file; otherwise, <<fopen>> | |
173 | is used. @var{mode} is passed directly to <<fopen>> or | |
68ffbac6 | 174 | <<fdopen>>. |
252b5132 RH |
175 | |
176 | Calls <<bfd_find_target>>, so @var{target} is interpreted as by | |
177 | that function. | |
178 | ||
a366f4ff MM |
179 | The new BFD is marked as cacheable iff @var{fd} is -1. |
180 | ||
252b5132 | 181 | If <<NULL>> is returned then an error has occured. Possible errors |
7c4a37eb AM |
182 | are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or |
183 | <<system_call>> error. | |
6f0c7050 TT |
184 | |
185 | On error, @var{fd} is always closed. | |
1be5090b NC |
186 | |
187 | A copy of the @var{filename} argument is stored in the newly created | |
188 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
189 | */ |
190 | ||
191 | bfd * | |
2d0123b7 | 192 | bfd_fopen (const char *filename, const char *target, const char *mode, int fd) |
252b5132 RH |
193 | { |
194 | bfd *nbfd; | |
195 | const bfd_target *target_vec; | |
196 | ||
197 | nbfd = _bfd_new_bfd (); | |
198 | if (nbfd == NULL) | |
6f0c7050 TT |
199 | { |
200 | if (fd != -1) | |
201 | close (fd); | |
202 | return NULL; | |
203 | } | |
252b5132 RH |
204 | |
205 | target_vec = bfd_find_target (target, nbfd); | |
206 | if (target_vec == NULL) | |
207 | { | |
6f0c7050 TT |
208 | if (fd != -1) |
209 | close (fd); | |
73e87d70 | 210 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
211 | return NULL; |
212 | } | |
68ffbac6 | 213 | |
2d0123b7 MM |
214 | #ifdef HAVE_FDOPEN |
215 | if (fd != -1) | |
216 | nbfd->iostream = fdopen (fd, mode); | |
217 | else | |
218 | #endif | |
2e6f4fae | 219 | nbfd->iostream = real_fopen (filename, mode); |
2d0123b7 MM |
220 | if (nbfd->iostream == NULL) |
221 | { | |
92a7c1b8 | 222 | bfd_set_error (bfd_error_system_call); |
2d0123b7 MM |
223 | _bfd_delete_bfd (nbfd); |
224 | return NULL; | |
225 | } | |
252b5132 | 226 | |
2d0123b7 | 227 | /* OK, put everything where it belongs. */ |
1be5090b NC |
228 | |
229 | /* PR 11983: Do not cache the original filename, but | |
230 | rather make a copy - the original might go away. */ | |
231 | nbfd->filename = xstrdup (filename); | |
252b5132 | 232 | |
2d0123b7 MM |
233 | /* Figure out whether the user is opening the file for reading, |
234 | writing, or both, by looking at the MODE argument. */ | |
68ffbac6 | 235 | if ((mode[0] == 'r' || mode[0] == 'w' || mode[0] == 'a') |
2d0123b7 MM |
236 | && mode[1] == '+') |
237 | nbfd->direction = both_direction; | |
238 | else if (mode[0] == 'r') | |
239 | nbfd->direction = read_direction; | |
240 | else | |
241 | nbfd->direction = write_direction; | |
242 | ||
243 | if (! bfd_cache_init (nbfd)) | |
252b5132 | 244 | { |
73e87d70 | 245 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
246 | return NULL; |
247 | } | |
2d0123b7 | 248 | nbfd->opened_once = TRUE; |
a253d456 | 249 | |
a366f4ff MM |
250 | /* If we opened the file by name, mark it cacheable; we can close it |
251 | and reopen it later. However, if a file descriptor was provided, | |
252 | then it may have been opened with special flags that make it | |
253 | unsafe to close and reopen the file. */ | |
254 | if (fd == -1) | |
a253d456 | 255 | (void) bfd_set_cacheable (nbfd, TRUE); |
252b5132 RH |
256 | |
257 | return nbfd; | |
258 | } | |
259 | ||
2d0123b7 MM |
260 | /* |
261 | FUNCTION | |
262 | bfd_openr | |
263 | ||
264 | SYNOPSIS | |
265 | bfd *bfd_openr (const char *filename, const char *target); | |
266 | ||
267 | DESCRIPTION | |
268 | Open the file @var{filename} (using <<fopen>>) with the target | |
269 | @var{target}. Return a pointer to the created BFD. | |
270 | ||
271 | Calls <<bfd_find_target>>, so @var{target} is interpreted as by | |
272 | that function. | |
273 | ||
274 | If <<NULL>> is returned then an error has occured. Possible errors | |
275 | are <<bfd_error_no_memory>>, <<bfd_error_invalid_target>> or | |
276 | <<system_call>> error. | |
1be5090b NC |
277 | |
278 | A copy of the @var{filename} argument is stored in the newly created | |
279 | BFD. It can be accessed via the bfd_get_filename() macro. | |
2d0123b7 MM |
280 | */ |
281 | ||
282 | bfd * | |
283 | bfd_openr (const char *filename, const char *target) | |
284 | { | |
285 | return bfd_fopen (filename, target, FOPEN_RB, -1); | |
286 | } | |
287 | ||
252b5132 RH |
288 | /* Don't try to `optimize' this function: |
289 | ||
290 | o - We lock using stack space so that interrupting the locking | |
291 | won't cause a storage leak. | |
292 | o - We open the file stream last, since we don't want to have to | |
293 | close it if anything goes wrong. Closing the stream means closing | |
c4f3d130 | 294 | the file descriptor too, even though we didn't open it. */ |
252b5132 RH |
295 | /* |
296 | FUNCTION | |
7c4a37eb | 297 | bfd_fdopenr |
252b5132 RH |
298 | |
299 | SYNOPSIS | |
c58b9523 | 300 | bfd *bfd_fdopenr (const char *filename, const char *target, int fd); |
252b5132 RH |
301 | |
302 | DESCRIPTION | |
7c4a37eb AM |
303 | <<bfd_fdopenr>> is to <<bfd_fopenr>> much like <<fdopen>> is to |
304 | <<fopen>>. It opens a BFD on a file already described by the | |
305 | @var{fd} supplied. | |
306 | ||
307 | When the file is later <<bfd_close>>d, the file descriptor will | |
308 | be closed. If the caller desires that this file descriptor be | |
309 | cached by BFD (opened as needed, closed as needed to free | |
310 | descriptors for other opens), with the supplied @var{fd} used as | |
311 | an initial file descriptor (but subject to closure at any time), | |
312 | call bfd_set_cacheable(bfd, 1) on the returned BFD. The default | |
7dee875e | 313 | is to assume no caching; the file descriptor will remain open |
7c4a37eb AM |
314 | until <<bfd_close>>, and will not be affected by BFD operations |
315 | on other files. | |
316 | ||
317 | Possible errors are <<bfd_error_no_memory>>, | |
318 | <<bfd_error_invalid_target>> and <<bfd_error_system_call>>. | |
6f0c7050 TT |
319 | |
320 | On error, @var{fd} is closed. | |
1be5090b NC |
321 | |
322 | A copy of the @var{filename} argument is stored in the newly created | |
323 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
324 | */ |
325 | ||
326 | bfd * | |
c58b9523 | 327 | bfd_fdopenr (const char *filename, const char *target, int fd) |
252b5132 | 328 | { |
2d0123b7 MM |
329 | const char *mode; |
330 | #if defined(HAVE_FCNTL) && defined(F_GETFL) | |
252b5132 | 331 | int fdflags; |
2d0123b7 | 332 | #endif |
252b5132 | 333 | |
252b5132 | 334 | #if ! defined(HAVE_FCNTL) || ! defined(F_GETFL) |
2d0123b7 | 335 | mode = FOPEN_RUB; /* Assume full access. */ |
252b5132 RH |
336 | #else |
337 | fdflags = fcntl (fd, F_GETFL, NULL); | |
767e34d1 | 338 | if (fdflags == -1) |
d83747fa | 339 | { |
6f0c7050 TT |
340 | int save = errno; |
341 | ||
342 | close (fd); | |
343 | errno = save; | |
d83747fa AM |
344 | bfd_set_error (bfd_error_system_call); |
345 | return NULL; | |
346 | } | |
252b5132 | 347 | |
c4f3d130 | 348 | /* (O_ACCMODE) parens are to avoid Ultrix header file bug. */ |
252b5132 RH |
349 | switch (fdflags & (O_ACCMODE)) |
350 | { | |
dfab97d6 MM |
351 | case O_RDONLY: mode = FOPEN_RB; break; |
352 | case O_WRONLY: mode = FOPEN_RUB; break; | |
353 | case O_RDWR: mode = FOPEN_RUB; break; | |
252b5132 RH |
354 | default: abort (); |
355 | } | |
356 | #endif | |
357 | ||
2d0123b7 | 358 | return bfd_fopen (filename, target, mode, fd); |
252b5132 RH |
359 | } |
360 | ||
361 | /* | |
362 | FUNCTION | |
363 | bfd_openstreamr | |
364 | ||
365 | SYNOPSIS | |
1be5090b | 366 | bfd *bfd_openstreamr (const char * filename, const char * target, void * stream); |
252b5132 RH |
367 | |
368 | DESCRIPTION | |
369 | ||
370 | Open a BFD for read access on an existing stdio stream. When | |
371 | the BFD is passed to <<bfd_close>>, the stream will be closed. | |
1be5090b NC |
372 | |
373 | A copy of the @var{filename} argument is stored in the newly created | |
374 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
375 | */ |
376 | ||
377 | bfd * | |
c58b9523 | 378 | bfd_openstreamr (const char *filename, const char *target, void *streamarg) |
252b5132 | 379 | { |
a50b1753 | 380 | FILE *stream = (FILE *) streamarg; |
252b5132 RH |
381 | bfd *nbfd; |
382 | const bfd_target *target_vec; | |
383 | ||
384 | nbfd = _bfd_new_bfd (); | |
385 | if (nbfd == NULL) | |
386 | return NULL; | |
387 | ||
388 | target_vec = bfd_find_target (target, nbfd); | |
389 | if (target_vec == NULL) | |
390 | { | |
73e87d70 | 391 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
392 | return NULL; |
393 | } | |
394 | ||
c58b9523 | 395 | nbfd->iostream = stream; |
1be5090b NC |
396 | /* PR 11983: Do not cache the original filename, but |
397 | rather make a copy - the original might go away. */ | |
398 | nbfd->filename = xstrdup (filename); | |
252b5132 | 399 | nbfd->direction = read_direction; |
dc810e39 | 400 | |
252b5132 RH |
401 | if (! bfd_cache_init (nbfd)) |
402 | { | |
73e87d70 | 403 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
404 | return NULL; |
405 | } | |
406 | ||
407 | return nbfd; | |
408 | } | |
40838a72 AC |
409 | |
410 | /* | |
411 | FUNCTION | |
412 | bfd_openr_iovec | |
413 | ||
414 | SYNOPSIS | |
415 | bfd *bfd_openr_iovec (const char *filename, const char *target, | |
e7f8eadb DK |
416 | void *(*open_func) (struct bfd *nbfd, |
417 | void *open_closure), | |
40838a72 | 418 | void *open_closure, |
e7f8eadb DK |
419 | file_ptr (*pread_func) (struct bfd *nbfd, |
420 | void *stream, | |
421 | void *buf, | |
422 | file_ptr nbytes, | |
423 | file_ptr offset), | |
424 | int (*close_func) (struct bfd *nbfd, | |
425 | void *stream), | |
426 | int (*stat_func) (struct bfd *abfd, | |
427 | void *stream, | |
428 | struct stat *sb)); | |
40838a72 AC |
429 | |
430 | DESCRIPTION | |
431 | ||
432 | Create and return a BFD backed by a read-only @var{stream}. | |
e7f8eadb DK |
433 | The @var{stream} is created using @var{open_func}, accessed using |
434 | @var{pread_func} and destroyed using @var{close_func}. | |
40838a72 AC |
435 | |
436 | Calls <<bfd_find_target>>, so @var{target} is interpreted as by | |
437 | that function. | |
438 | ||
e7f8eadb | 439 | Calls @var{open_func} (which can call <<bfd_zalloc>> and |
40838a72 | 440 | <<bfd_get_filename>>) to obtain the read-only stream backing |
e7f8eadb | 441 | the BFD. @var{open_func} either succeeds returning the |
40838a72 AC |
442 | non-<<NULL>> @var{stream}, or fails returning <<NULL>> |
443 | (setting <<bfd_error>>). | |
444 | ||
e7f8eadb | 445 | Calls @var{pread_func} to request @var{nbytes} of data from |
40838a72 | 446 | @var{stream} starting at @var{offset} (e.g., via a call to |
e7f8eadb | 447 | <<bfd_read>>). @var{pread_func} either succeeds returning the |
40838a72 AC |
448 | number of bytes read (which can be less than @var{nbytes} when |
449 | end-of-file), or fails returning -1 (setting <<bfd_error>>). | |
450 | ||
e7f8eadb DK |
451 | Calls @var{close_func} when the BFD is later closed using |
452 | <<bfd_close>>. @var{close_func} either succeeds returning 0, or | |
40838a72 AC |
453 | fails returning -1 (setting <<bfd_error>>). |
454 | ||
e7f8eadb DK |
455 | Calls @var{stat_func} to fill in a stat structure for bfd_stat, |
456 | bfd_get_size, and bfd_get_mtime calls. @var{stat_func} returns 0 | |
f6cf9273 AM |
457 | on success, or returns -1 on failure (setting <<bfd_error>>). |
458 | ||
40838a72 AC |
459 | If <<bfd_openr_iovec>> returns <<NULL>> then an error has |
460 | occurred. Possible errors are <<bfd_error_no_memory>>, | |
461 | <<bfd_error_invalid_target>> and <<bfd_error_system_call>>. | |
462 | ||
1be5090b NC |
463 | A copy of the @var{filename} argument is stored in the newly created |
464 | BFD. It can be accessed via the bfd_get_filename() macro. | |
40838a72 AC |
465 | */ |
466 | ||
467 | struct opncls | |
468 | { | |
469 | void *stream; | |
470 | file_ptr (*pread) (struct bfd *abfd, void *stream, void *buf, | |
471 | file_ptr nbytes, file_ptr offset); | |
472 | int (*close) (struct bfd *abfd, void *stream); | |
f6cf9273 | 473 | int (*stat) (struct bfd *abfd, void *stream, struct stat *sb); |
40838a72 AC |
474 | file_ptr where; |
475 | }; | |
476 | ||
477 | static file_ptr | |
478 | opncls_btell (struct bfd *abfd) | |
479 | { | |
a50b1753 | 480 | struct opncls *vec = (struct opncls *) abfd->iostream; |
40838a72 AC |
481 | return vec->where; |
482 | } | |
483 | ||
484 | static int | |
485 | opncls_bseek (struct bfd *abfd, file_ptr offset, int whence) | |
486 | { | |
a50b1753 | 487 | struct opncls *vec = (struct opncls *) abfd->iostream; |
40838a72 AC |
488 | switch (whence) |
489 | { | |
490 | case SEEK_SET: vec->where = offset; break; | |
491 | case SEEK_CUR: vec->where += offset; break; | |
492 | case SEEK_END: return -1; | |
493 | } | |
494 | return 0; | |
495 | } | |
496 | ||
497 | static file_ptr | |
498 | opncls_bread (struct bfd *abfd, void *buf, file_ptr nbytes) | |
499 | { | |
a50b1753 | 500 | struct opncls *vec = (struct opncls *) abfd->iostream; |
0709bb22 | 501 | file_ptr nread = (vec->pread) (abfd, vec->stream, buf, nbytes, vec->where); |
40838a72 AC |
502 | if (nread < 0) |
503 | return nread; | |
504 | vec->where += nread; | |
505 | return nread; | |
506 | } | |
507 | ||
508 | static file_ptr | |
509 | opncls_bwrite (struct bfd *abfd ATTRIBUTE_UNUSED, | |
510 | const void *where ATTRIBUTE_UNUSED, | |
511 | file_ptr nbytes ATTRIBUTE_UNUSED) | |
512 | { | |
513 | return -1; | |
514 | } | |
515 | ||
405bf443 | 516 | static int |
40838a72 AC |
517 | opncls_bclose (struct bfd *abfd) |
518 | { | |
a50b1753 | 519 | struct opncls *vec = (struct opncls *) abfd->iostream; |
40838a72 AC |
520 | /* Since the VEC's memory is bound to the bfd deleting the bfd will |
521 | free it. */ | |
522 | int status = 0; | |
523 | if (vec->close != NULL) | |
0709bb22 | 524 | status = (vec->close) (abfd, vec->stream); |
40838a72 | 525 | abfd->iostream = NULL; |
405bf443 | 526 | return status; |
40838a72 AC |
527 | } |
528 | ||
529 | static int | |
530 | opncls_bflush (struct bfd *abfd ATTRIBUTE_UNUSED) | |
531 | { | |
532 | return 0; | |
533 | } | |
534 | ||
535 | static int | |
f6cf9273 | 536 | opncls_bstat (struct bfd *abfd, struct stat *sb) |
40838a72 | 537 | { |
a50b1753 | 538 | struct opncls *vec = (struct opncls *) abfd->iostream; |
f6cf9273 | 539 | |
40838a72 | 540 | memset (sb, 0, sizeof (*sb)); |
f6cf9273 AM |
541 | if (vec->stat == NULL) |
542 | return 0; | |
543 | ||
544 | return (vec->stat) (abfd, vec->stream, sb); | |
40838a72 AC |
545 | } |
546 | ||
25b88f33 PP |
547 | static void * |
548 | opncls_bmmap (struct bfd *abfd ATTRIBUTE_UNUSED, | |
549 | void *addr ATTRIBUTE_UNUSED, | |
550 | bfd_size_type len ATTRIBUTE_UNUSED, | |
551 | int prot ATTRIBUTE_UNUSED, | |
552 | int flags ATTRIBUTE_UNUSED, | |
4c95ab76 TG |
553 | file_ptr offset ATTRIBUTE_UNUSED, |
554 | void **map_addr ATTRIBUTE_UNUSED, | |
555 | bfd_size_type *map_len ATTRIBUTE_UNUSED) | |
25b88f33 PP |
556 | { |
557 | return (void *) -1; | |
558 | } | |
559 | ||
40838a72 AC |
560 | static const struct bfd_iovec opncls_iovec = { |
561 | &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek, | |
25b88f33 | 562 | &opncls_bclose, &opncls_bflush, &opncls_bstat, &opncls_bmmap |
40838a72 AC |
563 | }; |
564 | ||
565 | bfd * | |
566 | bfd_openr_iovec (const char *filename, const char *target, | |
662e4701 | 567 | void *(*open_p) (struct bfd *, void *), |
40838a72 | 568 | void *open_closure, |
662e4701 L |
569 | file_ptr (*pread_p) (struct bfd *, void *, void *, |
570 | file_ptr, file_ptr), | |
571 | int (*close_p) (struct bfd *, void *), | |
572 | int (*stat_p) (struct bfd *, void *, struct stat *)) | |
40838a72 AC |
573 | { |
574 | bfd *nbfd; | |
575 | const bfd_target *target_vec; | |
576 | struct opncls *vec; | |
577 | void *stream; | |
578 | ||
579 | nbfd = _bfd_new_bfd (); | |
580 | if (nbfd == NULL) | |
581 | return NULL; | |
582 | ||
583 | target_vec = bfd_find_target (target, nbfd); | |
584 | if (target_vec == NULL) | |
585 | { | |
586 | _bfd_delete_bfd (nbfd); | |
587 | return NULL; | |
588 | } | |
589 | ||
1be5090b NC |
590 | /* PR 11983: Do not cache the original filename, but |
591 | rather make a copy - the original might go away. */ | |
592 | nbfd->filename = xstrdup (filename); | |
40838a72 AC |
593 | nbfd->direction = read_direction; |
594 | ||
662e4701 L |
595 | /* `open_p (...)' would get expanded by an the open(2) syscall macro. */ |
596 | stream = (*open_p) (nbfd, open_closure); | |
40838a72 AC |
597 | if (stream == NULL) |
598 | { | |
599 | _bfd_delete_bfd (nbfd); | |
600 | return NULL; | |
601 | } | |
602 | ||
a50b1753 | 603 | vec = (struct opncls *) bfd_zalloc (nbfd, sizeof (struct opncls)); |
40838a72 | 604 | vec->stream = stream; |
662e4701 L |
605 | vec->pread = pread_p; |
606 | vec->close = close_p; | |
607 | vec->stat = stat_p; | |
40838a72 AC |
608 | |
609 | nbfd->iovec = &opncls_iovec; | |
610 | nbfd->iostream = vec; | |
611 | ||
612 | return nbfd; | |
613 | } | |
252b5132 | 614 | \f |
c4f3d130 NC |
615 | /* bfd_openw -- open for writing. |
616 | Returns a pointer to a freshly-allocated BFD on success, or NULL. | |
252b5132 | 617 | |
c4f3d130 | 618 | See comment by bfd_fdopenr before you try to modify this function. */ |
252b5132 RH |
619 | |
620 | /* | |
621 | FUNCTION | |
622 | bfd_openw | |
623 | ||
624 | SYNOPSIS | |
c58b9523 | 625 | bfd *bfd_openw (const char *filename, const char *target); |
252b5132 RH |
626 | |
627 | DESCRIPTION | |
628 | Create a BFD, associated with file @var{filename}, using the | |
629 | file format @var{target}, and return a pointer to it. | |
630 | ||
631 | Possible errors are <<bfd_error_system_call>>, <<bfd_error_no_memory>>, | |
632 | <<bfd_error_invalid_target>>. | |
1be5090b NC |
633 | |
634 | A copy of the @var{filename} argument is stored in the newly created | |
635 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
636 | */ |
637 | ||
638 | bfd * | |
c58b9523 | 639 | bfd_openw (const char *filename, const char *target) |
252b5132 RH |
640 | { |
641 | bfd *nbfd; | |
642 | const bfd_target *target_vec; | |
643 | ||
252b5132 | 644 | /* nbfd has to point to head of malloc'ed block so that bfd_close may |
c4f3d130 | 645 | reclaim it correctly. */ |
252b5132 RH |
646 | nbfd = _bfd_new_bfd (); |
647 | if (nbfd == NULL) | |
648 | return NULL; | |
649 | ||
650 | target_vec = bfd_find_target (target, nbfd); | |
651 | if (target_vec == NULL) | |
652 | { | |
73e87d70 | 653 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
654 | return NULL; |
655 | } | |
656 | ||
1be5090b NC |
657 | /* PR 11983: Do not cache the original filename, but |
658 | rather make a copy - the original might go away. */ | |
659 | nbfd->filename = xstrdup (filename); | |
252b5132 RH |
660 | nbfd->direction = write_direction; |
661 | ||
662 | if (bfd_open_file (nbfd) == NULL) | |
663 | { | |
c4f3d130 NC |
664 | /* File not writeable, etc. */ |
665 | bfd_set_error (bfd_error_system_call); | |
73e87d70 | 666 | _bfd_delete_bfd (nbfd); |
252b5132 RH |
667 | return NULL; |
668 | } | |
669 | ||
670 | return nbfd; | |
671 | } | |
672 | ||
8c7d38e8 NC |
673 | static inline void |
674 | _maybe_make_executable (bfd * abfd) | |
675 | { | |
676 | /* If the file was open for writing and is now executable, | |
677 | make it so. */ | |
678 | if (abfd->direction == write_direction | |
dbde1c12 | 679 | && (abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
8c7d38e8 NC |
680 | { |
681 | struct stat buf; | |
682 | ||
683 | if (stat (abfd->filename, &buf) == 0 | |
684 | /* Do not attempt to change non-regular files. This is | |
685 | here especially for configure scripts and kernel builds | |
686 | which run tests with "ld [...] -o /dev/null". */ | |
687 | && S_ISREG(buf.st_mode)) | |
688 | { | |
689 | unsigned int mask = umask (0); | |
690 | ||
691 | umask (mask); | |
692 | chmod (abfd->filename, | |
693 | (0777 | |
694 | & (buf.st_mode | ((S_IXUSR | S_IXGRP | S_IXOTH) &~ mask)))); | |
695 | } | |
696 | } | |
697 | } | |
698 | ||
252b5132 RH |
699 | /* |
700 | ||
701 | FUNCTION | |
702 | bfd_close | |
703 | ||
704 | SYNOPSIS | |
b34976b6 | 705 | bfd_boolean bfd_close (bfd *abfd); |
252b5132 RH |
706 | |
707 | DESCRIPTION | |
708 | ||
7c4a37eb AM |
709 | Close a BFD. If the BFD was open for writing, then pending |
710 | operations are completed and the file written out and closed. | |
711 | If the created file is executable, then <<chmod>> is called | |
712 | to mark it as such. | |
252b5132 RH |
713 | |
714 | All memory attached to the BFD is released. | |
715 | ||
716 | The file descriptor associated with the BFD is closed (even | |
717 | if it was passed in to BFD by <<bfd_fdopenr>>). | |
718 | ||
719 | RETURNS | |
b34976b6 | 720 | <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. |
252b5132 RH |
721 | */ |
722 | ||
723 | ||
b34976b6 | 724 | bfd_boolean |
c58b9523 | 725 | bfd_close (bfd *abfd) |
252b5132 | 726 | { |
b34976b6 | 727 | bfd_boolean ret; |
252b5132 | 728 | |
c4f3d130 | 729 | if (bfd_write_p (abfd)) |
252b5132 RH |
730 | { |
731 | if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd))) | |
b34976b6 | 732 | return FALSE; |
252b5132 RH |
733 | } |
734 | ||
735 | if (! BFD_SEND (abfd, _close_and_cleanup, (abfd))) | |
b34976b6 | 736 | return FALSE; |
252b5132 | 737 | |
405bf443 | 738 | ret = abfd->iovec->bclose (abfd) == 0; |
252b5132 | 739 | |
8c7d38e8 NC |
740 | if (ret) |
741 | _maybe_make_executable (abfd); | |
252b5132 | 742 | |
73e87d70 | 743 | _bfd_delete_bfd (abfd); |
252b5132 RH |
744 | |
745 | return ret; | |
746 | } | |
747 | ||
748 | /* | |
749 | FUNCTION | |
750 | bfd_close_all_done | |
751 | ||
752 | SYNOPSIS | |
b34976b6 | 753 | bfd_boolean bfd_close_all_done (bfd *); |
252b5132 RH |
754 | |
755 | DESCRIPTION | |
7c4a37eb AM |
756 | Close a BFD. Differs from <<bfd_close>> since it does not |
757 | complete any pending operations. This routine would be used | |
758 | if the application had just used BFD for swapping and didn't | |
759 | want to use any of the writing code. | |
252b5132 RH |
760 | |
761 | If the created file is executable, then <<chmod>> is called | |
762 | to mark it as such. | |
763 | ||
764 | All memory attached to the BFD is released. | |
765 | ||
766 | RETURNS | |
b34976b6 | 767 | <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. |
252b5132 RH |
768 | */ |
769 | ||
b34976b6 | 770 | bfd_boolean |
c58b9523 | 771 | bfd_close_all_done (bfd *abfd) |
252b5132 | 772 | { |
b34976b6 | 773 | bfd_boolean ret; |
252b5132 RH |
774 | |
775 | ret = bfd_cache_close (abfd); | |
776 | ||
8c7d38e8 NC |
777 | if (ret) |
778 | _maybe_make_executable (abfd); | |
252b5132 | 779 | |
73e87d70 | 780 | _bfd_delete_bfd (abfd); |
252b5132 RH |
781 | |
782 | return ret; | |
783 | } | |
784 | ||
785 | /* | |
786 | FUNCTION | |
787 | bfd_create | |
788 | ||
789 | SYNOPSIS | |
c58b9523 | 790 | bfd *bfd_create (const char *filename, bfd *templ); |
252b5132 RH |
791 | |
792 | DESCRIPTION | |
7c4a37eb AM |
793 | Create a new BFD in the manner of <<bfd_openw>>, but without |
794 | opening a file. The new BFD takes the target from the target | |
fc1cfaa5 | 795 | used by @var{templ}. The format is always set to <<bfd_object>>. |
1be5090b NC |
796 | |
797 | A copy of the @var{filename} argument is stored in the newly created | |
798 | BFD. It can be accessed via the bfd_get_filename() macro. | |
252b5132 RH |
799 | */ |
800 | ||
801 | bfd * | |
c58b9523 | 802 | bfd_create (const char *filename, bfd *templ) |
252b5132 RH |
803 | { |
804 | bfd *nbfd; | |
805 | ||
806 | nbfd = _bfd_new_bfd (); | |
807 | if (nbfd == NULL) | |
808 | return NULL; | |
1be5090b NC |
809 | /* PR 11983: Do not cache the original filename, but |
810 | rather make a copy - the original might go away. */ | |
811 | nbfd->filename = xstrdup (filename); | |
252b5132 RH |
812 | if (templ) |
813 | nbfd->xvec = templ->xvec; | |
814 | nbfd->direction = no_direction; | |
815 | bfd_set_format (nbfd, bfd_object); | |
c4f3d130 | 816 | |
252b5132 RH |
817 | return nbfd; |
818 | } | |
819 | ||
820 | /* | |
821 | FUNCTION | |
822 | bfd_make_writable | |
823 | ||
824 | SYNOPSIS | |
b34976b6 | 825 | bfd_boolean bfd_make_writable (bfd *abfd); |
252b5132 RH |
826 | |
827 | DESCRIPTION | |
828 | Takes a BFD as created by <<bfd_create>> and converts it | |
829 | into one like as returned by <<bfd_openw>>. It does this | |
830 | by converting the BFD to BFD_IN_MEMORY. It's assumed that | |
831 | you will call <<bfd_make_readable>> on this bfd later. | |
832 | ||
833 | RETURNS | |
b34976b6 | 834 | <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. |
252b5132 RH |
835 | */ |
836 | ||
b34976b6 | 837 | bfd_boolean |
c58b9523 | 838 | bfd_make_writable (bfd *abfd) |
252b5132 RH |
839 | { |
840 | struct bfd_in_memory *bim; | |
841 | ||
842 | if (abfd->direction != no_direction) | |
843 | { | |
844 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 845 | return FALSE; |
252b5132 RH |
846 | } |
847 | ||
a50b1753 | 848 | bim = (struct bfd_in_memory *) bfd_malloc (sizeof (struct bfd_in_memory)); |
f6eea5ae MS |
849 | if (bim == NULL) |
850 | return FALSE; /* bfd_error already set. */ | |
c58b9523 | 851 | abfd->iostream = bim; |
c4f3d130 | 852 | /* bfd_bwrite will grow these as needed. */ |
252b5132 RH |
853 | bim->size = 0; |
854 | bim->buffer = 0; | |
855 | ||
856 | abfd->flags |= BFD_IN_MEMORY; | |
65077aa8 TG |
857 | abfd->iovec = &_bfd_memory_iovec; |
858 | abfd->origin = 0; | |
252b5132 RH |
859 | abfd->direction = write_direction; |
860 | abfd->where = 0; | |
861 | ||
b34976b6 | 862 | return TRUE; |
252b5132 RH |
863 | } |
864 | ||
865 | /* | |
866 | FUNCTION | |
867 | bfd_make_readable | |
868 | ||
869 | SYNOPSIS | |
b34976b6 | 870 | bfd_boolean bfd_make_readable (bfd *abfd); |
252b5132 RH |
871 | |
872 | DESCRIPTION | |
873 | Takes a BFD as created by <<bfd_create>> and | |
874 | <<bfd_make_writable>> and converts it into one like as | |
875 | returned by <<bfd_openr>>. It does this by writing the | |
876 | contents out to the memory buffer, then reversing the | |
877 | direction. | |
878 | ||
879 | RETURNS | |
b34976b6 | 880 | <<TRUE>> is returned if all is ok, otherwise <<FALSE>>. */ |
252b5132 | 881 | |
b34976b6 | 882 | bfd_boolean |
c58b9523 | 883 | bfd_make_readable (bfd *abfd) |
252b5132 RH |
884 | { |
885 | if (abfd->direction != write_direction || !(abfd->flags & BFD_IN_MEMORY)) | |
886 | { | |
887 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 888 | return FALSE; |
252b5132 RH |
889 | } |
890 | ||
891 | if (! BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd))) | |
b34976b6 | 892 | return FALSE; |
252b5132 RH |
893 | |
894 | if (! BFD_SEND (abfd, _close_and_cleanup, (abfd))) | |
b34976b6 | 895 | return FALSE; |
252b5132 | 896 | |
252b5132 RH |
897 | abfd->arch_info = &bfd_default_arch_struct; |
898 | ||
899 | abfd->where = 0; | |
252b5132 | 900 | abfd->format = bfd_unknown; |
c58b9523 | 901 | abfd->my_archive = NULL; |
dc810e39 | 902 | abfd->origin = 0; |
b34976b6 AM |
903 | abfd->opened_once = FALSE; |
904 | abfd->output_has_begun = FALSE; | |
252b5132 | 905 | abfd->section_count = 0; |
c58b9523 | 906 | abfd->usrdata = NULL; |
b34976b6 | 907 | abfd->cacheable = FALSE; |
9e2278f5 | 908 | abfd->flags |= BFD_IN_MEMORY; |
b34976b6 | 909 | abfd->mtime_set = FALSE; |
252b5132 | 910 | |
b34976b6 | 911 | abfd->target_defaulted = TRUE; |
252b5132 RH |
912 | abfd->direction = read_direction; |
913 | abfd->sections = 0; | |
914 | abfd->symcount = 0; | |
915 | abfd->outsymbols = 0; | |
916 | abfd->tdata.any = 0; | |
917 | ||
e54fdaa5 AM |
918 | bfd_section_list_clear (abfd); |
919 | bfd_check_format (abfd, bfd_object); | |
252b5132 | 920 | |
b34976b6 | 921 | return TRUE; |
252b5132 RH |
922 | } |
923 | ||
924 | /* | |
59a9808d | 925 | FUNCTION |
252b5132 RH |
926 | bfd_alloc |
927 | ||
928 | SYNOPSIS | |
0fdea5ce | 929 | void *bfd_alloc (bfd *abfd, bfd_size_type wanted); |
252b5132 RH |
930 | |
931 | DESCRIPTION | |
932 | Allocate a block of @var{wanted} bytes of memory attached to | |
933 | <<abfd>> and return a pointer to it. | |
934 | */ | |
935 | ||
c58b9523 AM |
936 | void * |
937 | bfd_alloc (bfd *abfd, bfd_size_type size) | |
252b5132 | 938 | { |
c58b9523 | 939 | void *ret; |
36e9d67b | 940 | unsigned long ul_size = (unsigned long) size; |
252b5132 | 941 | |
36e9d67b | 942 | if (size != ul_size |
db6b071a NC |
943 | /* Note - although objalloc_alloc takes an unsigned long as its |
944 | argument, internally the size is treated as a signed long. This can | |
945 | lead to problems where, for example, a request to allocate -1 bytes | |
946 | can result in just 1 byte being allocated, rather than | |
947 | ((unsigned long) -1) bytes. Also memory checkers will often | |
948 | complain about attempts to allocate a negative amount of memory. | |
949 | So to stop these problems we fail if the size is negative. */ | |
950 | || ((signed long) ul_size) < 0) | |
dc810e39 AM |
951 | { |
952 | bfd_set_error (bfd_error_no_memory); | |
953 | return NULL; | |
954 | } | |
db6b071a | 955 | |
36e9d67b | 956 | ret = objalloc_alloc ((struct objalloc *) abfd->memory, ul_size); |
252b5132 RH |
957 | if (ret == NULL) |
958 | bfd_set_error (bfd_error_no_memory); | |
959 | return ret; | |
960 | } | |
961 | ||
d0fb9a8d JJ |
962 | /* |
963 | INTERNAL_FUNCTION | |
964 | bfd_alloc2 | |
965 | ||
966 | SYNOPSIS | |
967 | void *bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size); | |
968 | ||
969 | DESCRIPTION | |
970 | Allocate a block of @var{nmemb} elements of @var{size} bytes each | |
971 | of memory attached to <<abfd>> and return a pointer to it. | |
972 | */ | |
973 | ||
974 | void * | |
975 | bfd_alloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size) | |
976 | { | |
d0fb9a8d JJ |
977 | if ((nmemb | size) >= HALF_BFD_SIZE_TYPE |
978 | && size != 0 | |
979 | && nmemb > ~(bfd_size_type) 0 / size) | |
980 | { | |
981 | bfd_set_error (bfd_error_no_memory); | |
982 | return NULL; | |
983 | } | |
984 | ||
36e9d67b | 985 | return bfd_alloc (abfd, size * nmemb); |
d0fb9a8d JJ |
986 | } |
987 | ||
c3e8c140 | 988 | /* |
59a9808d | 989 | FUNCTION |
c3e8c140 BE |
990 | bfd_zalloc |
991 | ||
992 | SYNOPSIS | |
993 | void *bfd_zalloc (bfd *abfd, bfd_size_type wanted); | |
994 | ||
995 | DESCRIPTION | |
996 | Allocate a block of @var{wanted} bytes of zeroed memory | |
997 | attached to <<abfd>> and return a pointer to it. | |
998 | */ | |
999 | ||
c58b9523 AM |
1000 | void * |
1001 | bfd_zalloc (bfd *abfd, bfd_size_type size) | |
252b5132 | 1002 | { |
c58b9523 | 1003 | void *res; |
252b5132 RH |
1004 | |
1005 | res = bfd_alloc (abfd, size); | |
1006 | if (res) | |
dc810e39 | 1007 | memset (res, 0, (size_t) size); |
252b5132 RH |
1008 | return res; |
1009 | } | |
1010 | ||
d0fb9a8d JJ |
1011 | /* |
1012 | INTERNAL_FUNCTION | |
1013 | bfd_zalloc2 | |
1014 | ||
1015 | SYNOPSIS | |
1016 | void *bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size); | |
1017 | ||
1018 | DESCRIPTION | |
1019 | Allocate a block of @var{nmemb} elements of @var{size} bytes each | |
1020 | of zeroed memory attached to <<abfd>> and return a pointer to it. | |
1021 | */ | |
1022 | ||
1023 | void * | |
1024 | bfd_zalloc2 (bfd *abfd, bfd_size_type nmemb, bfd_size_type size) | |
1025 | { | |
1026 | void *res; | |
1027 | ||
1028 | if ((nmemb | size) >= HALF_BFD_SIZE_TYPE | |
1029 | && size != 0 | |
1030 | && nmemb > ~(bfd_size_type) 0 / size) | |
1031 | { | |
1032 | bfd_set_error (bfd_error_no_memory); | |
1033 | return NULL; | |
1034 | } | |
1035 | ||
1036 | size *= nmemb; | |
1037 | ||
1038 | res = bfd_alloc (abfd, size); | |
1039 | if (res) | |
1040 | memset (res, 0, (size_t) size); | |
1041 | return res; | |
1042 | } | |
1043 | ||
73e87d70 AM |
1044 | /* Free a block allocated for a BFD. |
1045 | Note: Also frees all more recently allocated blocks! */ | |
252b5132 RH |
1046 | |
1047 | void | |
c58b9523 | 1048 | bfd_release (bfd *abfd, void *block) |
252b5132 RH |
1049 | { |
1050 | objalloc_free_block ((struct objalloc *) abfd->memory, block); | |
1051 | } | |
31f7ba04 NC |
1052 | |
1053 | ||
f12123c0 AM |
1054 | /* |
1055 | GNU Extension: separate debug-info files | |
1056 | ||
31f7ba04 NC |
1057 | The idea here is that a special section called .gnu_debuglink might be |
1058 | embedded in a binary file, which indicates that some *other* file | |
1059 | contains the real debugging information. This special section contains a | |
1060 | filename and CRC32 checksum, which we read and resolve to another file, | |
1061 | if it exists. | |
1062 | ||
1063 | This facilitates "optional" provision of debugging information, without | |
1064 | having to provide two complete copies of every binary object (with and | |
95e34fb4 NC |
1065 | without debug symbols). */ |
1066 | ||
1067 | #define GNU_DEBUGLINK ".gnu_debuglink" | |
1068 | #define GNU_DEBUGALTLINK ".gnu_debugaltlink" | |
31f7ba04 | 1069 | |
31f7ba04 | 1070 | /* |
2593f09a NC |
1071 | FUNCTION |
1072 | bfd_calc_gnu_debuglink_crc32 | |
31f7ba04 NC |
1073 | |
1074 | SYNOPSIS | |
c58b9523 AM |
1075 | unsigned long bfd_calc_gnu_debuglink_crc32 |
1076 | (unsigned long crc, const unsigned char *buf, bfd_size_type len); | |
31f7ba04 NC |
1077 | |
1078 | DESCRIPTION | |
2593f09a NC |
1079 | Computes a CRC value as used in the .gnu_debuglink section. |
1080 | Advances the previously computed @var{crc} value by computing | |
1081 | and adding in the crc32 for @var{len} bytes of @var{buf}. | |
1082 | ||
1083 | RETURNS | |
1084 | Return the updated CRC32 value. | |
f12123c0 | 1085 | */ |
31f7ba04 | 1086 | |
2593f09a | 1087 | unsigned long |
c58b9523 AM |
1088 | bfd_calc_gnu_debuglink_crc32 (unsigned long crc, |
1089 | const unsigned char *buf, | |
1090 | bfd_size_type len) | |
31f7ba04 NC |
1091 | { |
1092 | static const unsigned long crc32_table[256] = | |
1093 | { | |
1094 | 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, | |
1095 | 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, | |
1096 | 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, | |
1097 | 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, | |
1098 | 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, | |
1099 | 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, | |
1100 | 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, | |
1101 | 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, | |
1102 | 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, | |
1103 | 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, | |
1104 | 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, | |
1105 | 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, | |
1106 | 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, | |
1107 | 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, | |
1108 | 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, | |
1109 | 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, | |
1110 | 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, | |
1111 | 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, | |
1112 | 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, | |
1113 | 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, | |
1114 | 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, | |
1115 | 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, | |
1116 | 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, | |
1117 | 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, | |
1118 | 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, | |
1119 | 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, | |
1120 | 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, | |
1121 | 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, | |
1122 | 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, | |
1123 | 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, | |
1124 | 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, | |
1125 | 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, | |
1126 | 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, | |
1127 | 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, | |
1128 | 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, | |
1129 | 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, | |
1130 | 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, | |
1131 | 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, | |
1132 | 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, | |
1133 | 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, | |
1134 | 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, | |
1135 | 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, | |
1136 | 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, | |
1137 | 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, | |
1138 | 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, | |
1139 | 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, | |
1140 | 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, | |
1141 | 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, | |
1142 | 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, | |
1143 | 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, | |
1144 | 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, | |
1145 | 0x2d02ef8d | |
1146 | }; | |
1147 | const unsigned char *end; | |
1148 | ||
1149 | crc = ~crc & 0xffffffff; | |
1150 | for (end = buf + len; buf < end; ++ buf) | |
1151 | crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8); | |
5bb3703f | 1152 | return ~crc & 0xffffffff; |
31f7ba04 NC |
1153 | } |
1154 | ||
1155 | ||
1156 | /* | |
cc0ea93c TT |
1157 | FUNCTION |
1158 | bfd_get_debug_link_info | |
31f7ba04 NC |
1159 | |
1160 | SYNOPSIS | |
cc0ea93c | 1161 | char *bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out); |
31f7ba04 NC |
1162 | |
1163 | DESCRIPTION | |
1be5090b NC |
1164 | Fetch the filename and CRC32 value for any separate debuginfo |
1165 | associated with @var{abfd}. Return NULL if no such info found, | |
cc0ea93c TT |
1166 | otherwise return filename and update @var{crc32_out}. The |
1167 | returned filename is allocated with @code{malloc}; freeing it | |
1168 | is the responsibility of the caller. | |
31f7ba04 NC |
1169 | */ |
1170 | ||
cc0ea93c TT |
1171 | char * |
1172 | bfd_get_debug_link_info (bfd *abfd, unsigned long *crc32_out) | |
31f7ba04 | 1173 | { |
eea6121a | 1174 | asection *sect; |
31f7ba04 | 1175 | unsigned long crc32; |
eea6121a | 1176 | bfd_byte *contents; |
470c009b | 1177 | unsigned int crc_offset; |
f075ee0c | 1178 | char *name; |
31f7ba04 NC |
1179 | |
1180 | BFD_ASSERT (abfd); | |
1181 | BFD_ASSERT (crc32_out); | |
1182 | ||
2593f09a | 1183 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK); |
31f7ba04 NC |
1184 | |
1185 | if (sect == NULL) | |
1186 | return NULL; | |
1187 | ||
eea6121a | 1188 | if (!bfd_malloc_and_get_section (abfd, sect, &contents)) |
31f7ba04 | 1189 | { |
eea6121a AM |
1190 | if (contents != NULL) |
1191 | free (contents); | |
31f7ba04 NC |
1192 | return NULL; |
1193 | } | |
1194 | ||
470c009b | 1195 | /* CRC value is stored after the filename, aligned up to 4 bytes. */ |
f075ee0c | 1196 | name = (char *) contents; |
470c009b NC |
1197 | /* PR 17597: avoid reading off the end of the buffer. */ |
1198 | crc_offset = strnlen (name, bfd_get_section_size (sect)) + 1; | |
31f7ba04 | 1199 | crc_offset = (crc_offset + 3) & ~3; |
470c009b NC |
1200 | if (crc_offset >= bfd_get_section_size (sect)) |
1201 | return NULL; | |
31f7ba04 | 1202 | |
c58b9523 | 1203 | crc32 = bfd_get_32 (abfd, contents + crc_offset); |
31f7ba04 NC |
1204 | |
1205 | *crc32_out = crc32; | |
f075ee0c | 1206 | return name; |
31f7ba04 NC |
1207 | } |
1208 | ||
95e34fb4 NC |
1209 | /* |
1210 | FUNCTION | |
1211 | bfd_get_alt_debug_link_info | |
1212 | ||
1213 | SYNOPSIS | |
acd13123 TT |
1214 | char *bfd_get_alt_debug_link_info (bfd * abfd, |
1215 | bfd_size_type *buildid_len, | |
dc294be5 | 1216 | bfd_byte **buildid_out); |
95e34fb4 NC |
1217 | |
1218 | DESCRIPTION | |
1219 | Fetch the filename and BuildID value for any alternate debuginfo | |
1220 | associated with @var{abfd}. Return NULL if no such info found, | |
dc294be5 TT |
1221 | otherwise return filename and update @var{buildid_len} and |
1222 | @var{buildid_out}. The returned filename and build_id are | |
1223 | allocated with @code{malloc}; freeing them is the | |
1224 | responsibility of the caller. | |
95e34fb4 NC |
1225 | */ |
1226 | ||
1227 | char * | |
acd13123 | 1228 | bfd_get_alt_debug_link_info (bfd * abfd, bfd_size_type *buildid_len, |
dc294be5 | 1229 | bfd_byte **buildid_out) |
95e34fb4 NC |
1230 | { |
1231 | asection *sect; | |
1232 | bfd_byte *contents; | |
470c009b | 1233 | unsigned int buildid_offset; |
95e34fb4 NC |
1234 | char *name; |
1235 | ||
1236 | BFD_ASSERT (abfd); | |
dc294be5 | 1237 | BFD_ASSERT (buildid_len); |
95e34fb4 NC |
1238 | BFD_ASSERT (buildid_out); |
1239 | ||
1240 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGALTLINK); | |
1241 | ||
1242 | if (sect == NULL) | |
1243 | return NULL; | |
1244 | ||
1245 | if (!bfd_malloc_and_get_section (abfd, sect, & contents)) | |
1246 | { | |
1247 | if (contents != NULL) | |
1248 | free (contents); | |
1249 | return NULL; | |
1250 | } | |
1251 | ||
dc294be5 | 1252 | /* BuildID value is stored after the filename. */ |
95e34fb4 | 1253 | name = (char *) contents; |
470c009b NC |
1254 | buildid_offset = strnlen (name, bfd_get_section_size (sect)) + 1; |
1255 | if (buildid_offset >= bfd_get_section_size (sect)) | |
1256 | return NULL; | |
95e34fb4 | 1257 | |
dc294be5 TT |
1258 | *buildid_len = bfd_get_section_size (sect) - buildid_offset; |
1259 | *buildid_out = bfd_malloc (*buildid_len); | |
1260 | memcpy (*buildid_out, contents + buildid_offset, *buildid_len); | |
95e34fb4 NC |
1261 | |
1262 | return name; | |
1263 | } | |
1264 | ||
31f7ba04 NC |
1265 | /* |
1266 | INTERNAL_FUNCTION | |
1267 | separate_debug_file_exists | |
1268 | ||
1269 | SYNOPSIS | |
c58b9523 AM |
1270 | bfd_boolean separate_debug_file_exists |
1271 | (char *name, unsigned long crc32); | |
31f7ba04 NC |
1272 | |
1273 | DESCRIPTION | |
1274 | Checks to see if @var{name} is a file and if its contents | |
1275 | match @var{crc32}. | |
1276 | */ | |
1277 | ||
1278 | static bfd_boolean | |
c58b9523 | 1279 | separate_debug_file_exists (const char *name, const unsigned long crc) |
31f7ba04 | 1280 | { |
f075ee0c | 1281 | static unsigned char buffer [8 * 1024]; |
31f7ba04 | 1282 | unsigned long file_crc = 0; |
fed590bb | 1283 | FILE *f; |
2593f09a | 1284 | bfd_size_type count; |
31f7ba04 NC |
1285 | |
1286 | BFD_ASSERT (name); | |
1287 | ||
fed590bb AM |
1288 | f = real_fopen (name, FOPEN_RB); |
1289 | if (f == NULL) | |
31f7ba04 NC |
1290 | return FALSE; |
1291 | ||
fed590bb | 1292 | while ((count = fread (buffer, 1, sizeof (buffer), f)) > 0) |
2593f09a | 1293 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); |
31f7ba04 | 1294 | |
fed590bb | 1295 | fclose (f); |
31f7ba04 NC |
1296 | |
1297 | return crc == file_crc; | |
1298 | } | |
1299 | ||
95e34fb4 NC |
1300 | /* |
1301 | INTERNAL_FUNCTION | |
1302 | separate_alt_debug_file_exists | |
1303 | ||
1304 | SYNOPSIS | |
1305 | bfd_boolean separate_alt_debug_file_exists | |
1306 | (char *name, unsigned long crc32); | |
1307 | ||
1308 | DESCRIPTION | |
1309 | Checks to see if @var{name} is a file and if its BuildID | |
1310 | matches @var{buildid}. | |
1311 | */ | |
1312 | ||
1313 | static bfd_boolean | |
1314 | separate_alt_debug_file_exists (const char *name, | |
1315 | const unsigned long buildid ATTRIBUTE_UNUSED) | |
1316 | { | |
1317 | FILE *f; | |
1318 | ||
1319 | BFD_ASSERT (name); | |
1320 | ||
1321 | f = real_fopen (name, FOPEN_RB); | |
1322 | if (f == NULL) | |
1323 | return FALSE; | |
1324 | ||
1325 | /* FIXME: Add code to check buildid. */ | |
1326 | ||
1327 | fclose (f); | |
1328 | ||
1329 | return TRUE; | |
1330 | } | |
31f7ba04 NC |
1331 | |
1332 | /* | |
1333 | INTERNAL_FUNCTION | |
1334 | find_separate_debug_file | |
1335 | ||
1336 | SYNOPSIS | |
c58b9523 | 1337 | char *find_separate_debug_file (bfd *abfd); |
31f7ba04 NC |
1338 | |
1339 | DESCRIPTION | |
95e34fb4 NC |
1340 | Searches @var{abfd} for a section called @var{section_name} which |
1341 | is expected to contain a reference to a file containing separate | |
1342 | debugging information. The function scans various locations in | |
1343 | the filesystem, including the file tree rooted at | |
1344 | @var{debug_file_directory}, and returns the first matching | |
1345 | filename that it finds. If @var{check_crc} is TRUE then the | |
1346 | contents of the file must also match the CRC value contained in | |
1347 | @var{section_name}. Returns NULL if no valid file could be found. | |
31f7ba04 NC |
1348 | */ |
1349 | ||
95e34fb4 NC |
1350 | typedef char * (* get_func_type) (bfd *, unsigned long *); |
1351 | typedef bfd_boolean (* check_func_type) (const char *, const unsigned long); | |
1352 | ||
31f7ba04 | 1353 | static char * |
95e34fb4 NC |
1354 | find_separate_debug_file (bfd * abfd, |
1355 | const char * debug_file_directory, | |
1356 | get_func_type get_func, | |
1357 | check_func_type check_func) | |
31f7ba04 | 1358 | { |
91d6fa6a | 1359 | char *base; |
31f7ba04 NC |
1360 | char *dir; |
1361 | char *debugfile; | |
91910cdd | 1362 | char *canon_dir; |
31f7ba04 | 1363 | unsigned long crc32; |
3ea6b9a5 | 1364 | size_t dirlen; |
91910cdd | 1365 | size_t canon_dirlen; |
31f7ba04 NC |
1366 | |
1367 | BFD_ASSERT (abfd); | |
1368 | if (debug_file_directory == NULL) | |
1369 | debug_file_directory = "."; | |
1370 | ||
1371 | /* BFD may have been opened from a stream. */ | |
3ea6b9a5 AM |
1372 | if (abfd->filename == NULL) |
1373 | { | |
1374 | bfd_set_error (bfd_error_invalid_operation); | |
1375 | return NULL; | |
1376 | } | |
31f7ba04 | 1377 | |
95e34fb4 NC |
1378 | base = get_func (abfd, & crc32); |
1379 | ||
91d6fa6a | 1380 | if (base == NULL) |
31f7ba04 | 1381 | return NULL; |
2593f09a | 1382 | |
91d6fa6a | 1383 | if (base[0] == '\0') |
5ed6aba4 | 1384 | { |
91d6fa6a | 1385 | free (base); |
3ea6b9a5 | 1386 | bfd_set_error (bfd_error_no_debug_section); |
5ed6aba4 NC |
1387 | return NULL; |
1388 | } | |
31f7ba04 | 1389 | |
3ea6b9a5 AM |
1390 | for (dirlen = strlen (abfd->filename); dirlen > 0; dirlen--) |
1391 | if (IS_DIR_SEPARATOR (abfd->filename[dirlen - 1])) | |
1392 | break; | |
1393 | ||
a50b1753 | 1394 | dir = (char *) bfd_malloc (dirlen + 1); |
2593f09a NC |
1395 | if (dir == NULL) |
1396 | { | |
91d6fa6a | 1397 | free (base); |
2593f09a NC |
1398 | return NULL; |
1399 | } | |
3ea6b9a5 AM |
1400 | memcpy (dir, abfd->filename, dirlen); |
1401 | dir[dirlen] = '\0'; | |
1402 | ||
91910cdd AS |
1403 | /* Compute the canonical name of the bfd object with all symbolic links |
1404 | resolved, for use in the global debugfile directory. */ | |
1405 | canon_dir = lrealpath (abfd->filename); | |
1406 | for (canon_dirlen = strlen (canon_dir); canon_dirlen > 0; canon_dirlen--) | |
1407 | if (IS_DIR_SEPARATOR (canon_dir[canon_dirlen - 1])) | |
1408 | break; | |
1409 | canon_dir[canon_dirlen] = '\0'; | |
1410 | ||
a50b1753 NC |
1411 | debugfile = (char *) |
1412 | bfd_malloc (strlen (debug_file_directory) + 1 | |
1413 | + (canon_dirlen > dirlen ? canon_dirlen : dirlen) | |
1414 | + strlen (".debug/") | |
91d6fa6a | 1415 | + strlen (base) |
a50b1753 | 1416 | + 1); |
2593f09a | 1417 | if (debugfile == NULL) |
95e34fb4 | 1418 | goto found; /* Actually this returns NULL. */ |
31f7ba04 NC |
1419 | |
1420 | /* First try in the same directory as the original file: */ | |
1421 | strcpy (debugfile, dir); | |
91d6fa6a | 1422 | strcat (debugfile, base); |
31f7ba04 | 1423 | |
95e34fb4 NC |
1424 | if (check_func (debugfile, crc32)) |
1425 | goto found; | |
31f7ba04 NC |
1426 | |
1427 | /* Then try in a subdirectory called .debug. */ | |
1428 | strcpy (debugfile, dir); | |
1429 | strcat (debugfile, ".debug/"); | |
91d6fa6a | 1430 | strcat (debugfile, base); |
31f7ba04 | 1431 | |
95e34fb4 NC |
1432 | if (check_func (debugfile, crc32)) |
1433 | goto found; | |
31f7ba04 NC |
1434 | |
1435 | /* Then try in the global debugfile directory. */ | |
1436 | strcpy (debugfile, debug_file_directory); | |
91910cdd AS |
1437 | dirlen = strlen (debug_file_directory) - 1; |
1438 | if (dirlen > 0 | |
1439 | && debug_file_directory[dirlen] != '/' | |
1440 | && canon_dir[0] != '/') | |
31f7ba04 | 1441 | strcat (debugfile, "/"); |
91910cdd | 1442 | strcat (debugfile, canon_dir); |
91d6fa6a | 1443 | strcat (debugfile, base); |
31f7ba04 | 1444 | |
95e34fb4 NC |
1445 | if (check_func (debugfile, crc32)) |
1446 | goto found; | |
31f7ba04 | 1447 | |
95e34fb4 | 1448 | /* Failed to find the file. */ |
31f7ba04 | 1449 | free (debugfile); |
95e34fb4 NC |
1450 | debugfile = NULL; |
1451 | ||
1452 | found: | |
91d6fa6a | 1453 | free (base); |
31f7ba04 | 1454 | free (dir); |
91910cdd | 1455 | free (canon_dir); |
95e34fb4 | 1456 | return debugfile; |
31f7ba04 NC |
1457 | } |
1458 | ||
1459 | ||
1460 | /* | |
1461 | FUNCTION | |
1462 | bfd_follow_gnu_debuglink | |
1463 | ||
1464 | SYNOPSIS | |
c58b9523 | 1465 | char *bfd_follow_gnu_debuglink (bfd *abfd, const char *dir); |
31f7ba04 NC |
1466 | |
1467 | DESCRIPTION | |
1468 | ||
1469 | Takes a BFD and searches it for a .gnu_debuglink section. If this | |
28d39d1a NC |
1470 | section is found, it examines the section for the name and checksum |
1471 | of a '.debug' file containing auxiliary debugging information. It | |
1472 | then searches the filesystem for this .debug file in some standard | |
31f7ba04 | 1473 | locations, including the directory tree rooted at @var{dir}, and if |
28d39d1a NC |
1474 | found returns the full filename. |
1475 | ||
1476 | If @var{dir} is NULL, it will search a default path configured into | |
1477 | libbfd at build time. [XXX this feature is not currently | |
1478 | implemented]. | |
31f7ba04 NC |
1479 | |
1480 | RETURNS | |
1481 | <<NULL>> on any errors or failure to locate the .debug file, | |
1482 | otherwise a pointer to a heap-allocated string containing the | |
28d39d1a | 1483 | filename. The caller is responsible for freeing this string. |
31f7ba04 NC |
1484 | */ |
1485 | ||
1486 | char * | |
c58b9523 | 1487 | bfd_follow_gnu_debuglink (bfd *abfd, const char *dir) |
31f7ba04 | 1488 | { |
95e34fb4 NC |
1489 | return find_separate_debug_file (abfd, dir, |
1490 | bfd_get_debug_link_info, | |
1491 | separate_debug_file_exists); | |
1492 | } | |
1493 | ||
dc294be5 TT |
1494 | /* Helper for bfd_follow_gnu_debugaltlink. It just pretends to return |
1495 | a CRC. .gnu_debugaltlink supplies a build-id, which is different, | |
1496 | but this is ok because separate_alt_debug_file_exists ignores the | |
1497 | CRC anyway. */ | |
1498 | ||
1499 | static char * | |
1500 | get_alt_debug_link_info_shim (bfd * abfd, unsigned long *crc32_out) | |
1501 | { | |
6e114b15 | 1502 | bfd_size_type len; |
dc294be5 TT |
1503 | bfd_byte *buildid = NULL; |
1504 | char *result = bfd_get_alt_debug_link_info (abfd, &len, &buildid); | |
1505 | ||
1506 | *crc32_out = 0; | |
1507 | free (buildid); | |
1508 | ||
1509 | return result; | |
1510 | } | |
1511 | ||
95e34fb4 NC |
1512 | /* |
1513 | FUNCTION | |
1514 | bfd_follow_gnu_debugaltlink | |
1515 | ||
1516 | SYNOPSIS | |
1517 | char *bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir); | |
1518 | ||
1519 | DESCRIPTION | |
1520 | ||
1521 | Takes a BFD and searches it for a .gnu_debugaltlink section. If this | |
1522 | section is found, it examines the section for the name of a file | |
1523 | containing auxiliary debugging information. It then searches the | |
1524 | filesystem for this file in a set of standard locations, including | |
1525 | the directory tree rooted at @var{dir}, and if found returns the | |
1526 | full filename. | |
1527 | ||
1528 | If @var{dir} is NULL, it will search a default path configured into | |
1529 | libbfd at build time. [FIXME: This feature is not currently | |
1530 | implemented]. | |
1531 | ||
1532 | RETURNS | |
1533 | <<NULL>> on any errors or failure to locate the debug file, | |
1534 | otherwise a pointer to a heap-allocated string containing the | |
1535 | filename. The caller is responsible for freeing this string. | |
1536 | */ | |
1537 | ||
1538 | char * | |
1539 | bfd_follow_gnu_debugaltlink (bfd *abfd, const char *dir) | |
1540 | { | |
1541 | return find_separate_debug_file (abfd, dir, | |
dc294be5 | 1542 | get_alt_debug_link_info_shim, |
95e34fb4 | 1543 | separate_alt_debug_file_exists); |
31f7ba04 | 1544 | } |
2593f09a NC |
1545 | |
1546 | /* | |
1547 | FUNCTION | |
e7c81c25 | 1548 | bfd_create_gnu_debuglink_section |
2593f09a NC |
1549 | |
1550 | SYNOPSIS | |
198beae2 | 1551 | struct bfd_section *bfd_create_gnu_debuglink_section |
c58b9523 | 1552 | (bfd *abfd, const char *filename); |
2593f09a NC |
1553 | |
1554 | DESCRIPTION | |
1555 | ||
e7c81c25 NC |
1556 | Takes a @var{BFD} and adds a .gnu_debuglink section to it. The section is sized |
1557 | to be big enough to contain a link to the specified @var{filename}. | |
1558 | ||
1559 | RETURNS | |
1560 | A pointer to the new section is returned if all is ok. Otherwise <<NULL>> is | |
f12123c0 | 1561 | returned and bfd_error is set. |
e7c81c25 NC |
1562 | */ |
1563 | ||
1564 | asection * | |
c58b9523 | 1565 | bfd_create_gnu_debuglink_section (bfd *abfd, const char *filename) |
e7c81c25 | 1566 | { |
c58b9523 AM |
1567 | asection *sect; |
1568 | bfd_size_type debuglink_size; | |
117ed4f8 | 1569 | flagword flags; |
e7c81c25 NC |
1570 | |
1571 | if (abfd == NULL || filename == NULL) | |
1572 | { | |
1573 | bfd_set_error (bfd_error_invalid_operation); | |
1574 | return NULL; | |
1575 | } | |
1576 | ||
1577 | /* Strip off any path components in filename. */ | |
1578 | filename = lbasename (filename); | |
f12123c0 | 1579 | |
e7c81c25 NC |
1580 | sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK); |
1581 | if (sect) | |
1582 | { | |
1583 | /* Section already exists. */ | |
1584 | bfd_set_error (bfd_error_invalid_operation); | |
1585 | return NULL; | |
1586 | } | |
1587 | ||
117ed4f8 AM |
1588 | flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DEBUGGING; |
1589 | sect = bfd_make_section_with_flags (abfd, GNU_DEBUGLINK, flags); | |
e7c81c25 NC |
1590 | if (sect == NULL) |
1591 | return NULL; | |
1592 | ||
e7c81c25 NC |
1593 | debuglink_size = strlen (filename) + 1; |
1594 | debuglink_size += 3; | |
1595 | debuglink_size &= ~3; | |
1596 | debuglink_size += 4; | |
1597 | ||
1598 | if (! bfd_set_section_size (abfd, sect, debuglink_size)) | |
1599 | /* XXX Should we delete the section from the bfd ? */ | |
1600 | return NULL; | |
f12123c0 | 1601 | |
e7c81c25 NC |
1602 | return sect; |
1603 | } | |
1604 | ||
1605 | ||
1606 | /* | |
1607 | FUNCTION | |
1608 | bfd_fill_in_gnu_debuglink_section | |
1609 | ||
1610 | SYNOPSIS | |
c58b9523 | 1611 | bfd_boolean bfd_fill_in_gnu_debuglink_section |
198beae2 | 1612 | (bfd *abfd, struct bfd_section *sect, const char *filename); |
e7c81c25 NC |
1613 | |
1614 | DESCRIPTION | |
1615 | ||
1616 | Takes a @var{BFD} and containing a .gnu_debuglink section @var{SECT} | |
1617 | and fills in the contents of the section to contain a link to the | |
1618 | specified @var{filename}. The filename should be relative to the | |
1619 | current directory. | |
2593f09a NC |
1620 | |
1621 | RETURNS | |
1622 | <<TRUE>> is returned if all is ok. Otherwise <<FALSE>> is returned | |
f12123c0 | 1623 | and bfd_error is set. |
2593f09a NC |
1624 | */ |
1625 | ||
1626 | bfd_boolean | |
c58b9523 | 1627 | bfd_fill_in_gnu_debuglink_section (bfd *abfd, |
198beae2 | 1628 | struct bfd_section *sect, |
c58b9523 | 1629 | const char *filename) |
2593f09a | 1630 | { |
2593f09a NC |
1631 | bfd_size_type debuglink_size; |
1632 | unsigned long crc32; | |
1633 | char * contents; | |
1634 | bfd_size_type crc_offset; | |
1635 | FILE * handle; | |
f075ee0c | 1636 | static unsigned char buffer[8 * 1024]; |
2593f09a | 1637 | size_t count; |
3ea6b9a5 | 1638 | size_t filelen; |
2593f09a | 1639 | |
e7c81c25 | 1640 | if (abfd == NULL || sect == NULL || filename == NULL) |
2593f09a NC |
1641 | { |
1642 | bfd_set_error (bfd_error_invalid_operation); | |
1643 | return FALSE; | |
1644 | } | |
1645 | ||
1646 | /* Make sure that we can read the file. | |
1647 | XXX - Should we attempt to locate the debug info file using the same | |
1648 | algorithm as gdb ? At the moment, since we are creating the | |
1649 | .gnu_debuglink section, we insist upon the user providing us with a | |
1650 | correct-for-section-creation-time path, but this need not conform to | |
1651 | the gdb location algorithm. */ | |
2e6f4fae | 1652 | handle = real_fopen (filename, FOPEN_RB); |
2593f09a NC |
1653 | if (handle == NULL) |
1654 | { | |
1655 | bfd_set_error (bfd_error_system_call); | |
1656 | return FALSE; | |
1657 | } | |
1658 | ||
1659 | crc32 = 0; | |
1660 | while ((count = fread (buffer, 1, sizeof buffer, handle)) > 0) | |
1661 | crc32 = bfd_calc_gnu_debuglink_crc32 (crc32, buffer, count); | |
1662 | fclose (handle); | |
1663 | ||
1664 | /* Strip off any path components in filename, | |
1665 | now that we no longer need them. */ | |
1666 | filename = lbasename (filename); | |
f12123c0 | 1667 | |
3ea6b9a5 AM |
1668 | filelen = strlen (filename); |
1669 | debuglink_size = filelen + 1; | |
2593f09a NC |
1670 | debuglink_size += 3; |
1671 | debuglink_size &= ~3; | |
1672 | debuglink_size += 4; | |
1673 | ||
a50b1753 | 1674 | contents = (char *) bfd_malloc (debuglink_size); |
2593f09a NC |
1675 | if (contents == NULL) |
1676 | { | |
1677 | /* XXX Should we delete the section from the bfd ? */ | |
2593f09a NC |
1678 | return FALSE; |
1679 | } | |
1680 | ||
2593f09a | 1681 | crc_offset = debuglink_size - 4; |
3ea6b9a5 AM |
1682 | memcpy (contents, filename, filelen); |
1683 | memset (contents + filelen, 0, crc_offset - filelen); | |
2593f09a | 1684 | |
c58b9523 | 1685 | bfd_put_32 (abfd, crc32, contents + crc_offset); |
2593f09a | 1686 | |
c58b9523 | 1687 | if (! bfd_set_section_contents (abfd, sect, contents, 0, debuglink_size)) |
2593f09a NC |
1688 | { |
1689 | /* XXX Should we delete the section from the bfd ? */ | |
1690 | free (contents); | |
1691 | return FALSE; | |
1692 | } | |
1693 | ||
1694 | return TRUE; | |
1695 | } |