Commit | Line | Data |
---|---|---|
cbb099e8 TT |
1 | /* Definitions for BFD wrappers used by GDB. |
2 | ||
28e7fd62 | 3 | Copyright (C) 2011-2013 Free Software Foundation, Inc. |
cbb099e8 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdb_bfd.h" | |
22 | #include "gdb_assert.h" | |
a4453b7e | 23 | #include "gdb_string.h" |
d6b28940 TT |
24 | #include "ui-out.h" |
25 | #include "gdbcmd.h" | |
6ec53d05 | 26 | #include "hashtab.h" |
614c279d | 27 | #include "filestuff.h" |
4bf44c1c TT |
28 | #ifdef HAVE_ZLIB_H |
29 | #include <zlib.h> | |
30 | #endif | |
31 | #ifdef HAVE_MMAP | |
32 | #include <sys/mman.h> | |
33 | #ifndef MAP_FAILED | |
34 | #define MAP_FAILED ((void *) -1) | |
35 | #endif | |
36 | #endif | |
37 | ||
38 | /* An object of this type is stored in the section's user data when | |
39 | mapping a section. */ | |
40 | ||
41 | struct gdb_bfd_section_data | |
42 | { | |
43 | /* Size of the data. */ | |
44 | bfd_size_type size; | |
45 | /* If the data was mmapped, this is the length of the map. */ | |
46 | bfd_size_type map_len; | |
47 | /* The data. If NULL, the section data has not been read. */ | |
48 | void *data; | |
49 | /* If the data was mmapped, this is the map address. */ | |
50 | void *map_addr; | |
51 | }; | |
a4453b7e | 52 | |
d6b28940 TT |
53 | /* A hash table holding every BFD that gdb knows about. This is not |
54 | to be confused with 'gdb_bfd_cache', which is used for sharing | |
55 | BFDs; in contrast, this hash is used just to implement | |
56 | "maint info bfd". */ | |
57 | ||
58 | static htab_t all_bfds; | |
59 | ||
a4453b7e TT |
60 | /* See gdb_bfd.h. */ |
61 | ||
62 | void | |
63 | gdb_bfd_stash_filename (struct bfd *abfd) | |
64 | { | |
65 | char *name = bfd_get_filename (abfd); | |
66 | char *data; | |
67 | ||
68 | data = bfd_alloc (abfd, strlen (name) + 1); | |
69 | strcpy (data, name); | |
70 | ||
71 | /* Unwarranted chumminess with BFD. */ | |
72 | abfd->filename = data; | |
73 | } | |
cbb099e8 | 74 | |
6ec53d05 TT |
75 | /* An object of this type is stored in each BFD's user data. */ |
76 | ||
77 | struct gdb_bfd_data | |
78 | { | |
79 | /* The reference count. */ | |
80 | int refc; | |
81 | ||
82 | /* The mtime of the BFD at the point the cache entry was made. */ | |
83 | time_t mtime; | |
b82d08cd | 84 | |
1da77581 TT |
85 | /* This is true if we have determined whether this BFD has any |
86 | sections requiring relocation. */ | |
87 | unsigned int relocation_computed : 1; | |
88 | ||
89 | /* This is true if any section needs relocation. */ | |
90 | unsigned int needs_relocations : 1; | |
91 | ||
dccee2de TT |
92 | /* This is true if we have successfully computed the file's CRC. */ |
93 | unsigned int crc_computed : 1; | |
94 | ||
95 | /* The file's CRC. */ | |
96 | unsigned long crc; | |
97 | ||
b82d08cd TT |
98 | /* If the BFD comes from an archive, this points to the archive's |
99 | BFD. Otherwise, this is NULL. */ | |
100 | bfd *archive_bfd; | |
e992eda4 TT |
101 | |
102 | /* The registry. */ | |
103 | REGISTRY_FIELDS; | |
6ec53d05 TT |
104 | }; |
105 | ||
e992eda4 TT |
106 | #define GDB_BFD_DATA_ACCESSOR(ABFD) \ |
107 | ((struct gdb_bfd_data *) bfd_usrdata (ABFD)) | |
108 | ||
109 | DEFINE_REGISTRY (bfd, GDB_BFD_DATA_ACCESSOR) | |
110 | ||
6ec53d05 TT |
111 | /* A hash table storing all the BFDs maintained in the cache. */ |
112 | ||
113 | static htab_t gdb_bfd_cache; | |
114 | ||
115 | /* The type of an object being looked up in gdb_bfd_cache. We use | |
116 | htab's capability of storing one kind of object (BFD in this case) | |
117 | and using a different sort of object for searching. */ | |
118 | ||
119 | struct gdb_bfd_cache_search | |
120 | { | |
121 | /* The filename. */ | |
122 | const char *filename; | |
123 | /* The mtime. */ | |
124 | time_t mtime; | |
125 | }; | |
126 | ||
127 | /* A hash function for BFDs. */ | |
128 | ||
129 | static hashval_t | |
130 | hash_bfd (const void *b) | |
131 | { | |
132 | const bfd *abfd = b; | |
133 | ||
134 | /* It is simplest to just hash the filename. */ | |
135 | return htab_hash_string (bfd_get_filename (abfd)); | |
136 | } | |
137 | ||
138 | /* An equality function for BFDs. Note that this expects the caller | |
139 | to search using struct gdb_bfd_cache_search only, not BFDs. */ | |
140 | ||
141 | static int | |
142 | eq_bfd (const void *a, const void *b) | |
143 | { | |
144 | const bfd *abfd = a; | |
145 | const struct gdb_bfd_cache_search *s = b; | |
146 | struct gdb_bfd_data *gdata = bfd_usrdata (abfd); | |
147 | ||
148 | return (gdata->mtime == s->mtime | |
149 | && strcmp (bfd_get_filename (abfd), s->filename) == 0); | |
150 | } | |
151 | ||
152 | /* See gdb_bfd.h. */ | |
153 | ||
154 | struct bfd * | |
155 | gdb_bfd_open (const char *name, const char *target, int fd) | |
156 | { | |
157 | hashval_t hash; | |
158 | void **slot; | |
159 | bfd *abfd; | |
160 | struct gdb_bfd_cache_search search; | |
161 | struct stat st; | |
162 | ||
163 | if (gdb_bfd_cache == NULL) | |
164 | gdb_bfd_cache = htab_create_alloc (1, hash_bfd, eq_bfd, NULL, | |
165 | xcalloc, xfree); | |
166 | ||
167 | if (fd == -1) | |
168 | { | |
614c279d | 169 | fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0); |
6ec53d05 TT |
170 | if (fd == -1) |
171 | { | |
172 | bfd_set_error (bfd_error_system_call); | |
173 | return NULL; | |
174 | } | |
175 | } | |
176 | ||
177 | search.filename = name; | |
178 | if (fstat (fd, &st) < 0) | |
179 | { | |
180 | /* Weird situation here. */ | |
181 | search.mtime = 0; | |
182 | } | |
183 | else | |
184 | search.mtime = st.st_mtime; | |
185 | ||
186 | /* Note that this must compute the same result as hash_bfd. */ | |
187 | hash = htab_hash_string (name); | |
188 | /* Note that we cannot use htab_find_slot_with_hash here, because | |
189 | opening the BFD may fail; and this would violate hashtab | |
190 | invariants. */ | |
191 | abfd = htab_find_with_hash (gdb_bfd_cache, &search, hash); | |
192 | if (abfd != NULL) | |
193 | { | |
194 | close (fd); | |
520b0001 TT |
195 | gdb_bfd_ref (abfd); |
196 | return abfd; | |
6ec53d05 TT |
197 | } |
198 | ||
199 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); | |
200 | if (abfd == NULL) | |
201 | return NULL; | |
202 | ||
203 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, INSERT); | |
204 | gdb_assert (!*slot); | |
205 | *slot = abfd; | |
206 | ||
207 | gdb_bfd_stash_filename (abfd); | |
520b0001 TT |
208 | gdb_bfd_ref (abfd); |
209 | return abfd; | |
6ec53d05 TT |
210 | } |
211 | ||
4bf44c1c TT |
212 | /* A helper function that releases any section data attached to the |
213 | BFD. */ | |
214 | ||
215 | static void | |
216 | free_one_bfd_section (bfd *abfd, asection *sectp, void *ignore) | |
217 | { | |
218 | struct gdb_bfd_section_data *sect = bfd_get_section_userdata (abfd, sectp); | |
219 | ||
220 | if (sect != NULL && sect->data != NULL) | |
221 | { | |
222 | #ifdef HAVE_MMAP | |
223 | if (sect->map_addr != NULL) | |
224 | { | |
225 | int res; | |
226 | ||
227 | res = munmap (sect->map_addr, sect->map_len); | |
228 | gdb_assert (res == 0); | |
229 | } | |
230 | else | |
231 | #endif | |
232 | xfree (sect->data); | |
233 | } | |
234 | } | |
235 | ||
cbb099e8 TT |
236 | /* Close ABFD, and warn if that fails. */ |
237 | ||
238 | static int | |
239 | gdb_bfd_close_or_warn (struct bfd *abfd) | |
240 | { | |
241 | int ret; | |
242 | char *name = bfd_get_filename (abfd); | |
243 | ||
4bf44c1c TT |
244 | bfd_map_over_sections (abfd, free_one_bfd_section, NULL); |
245 | ||
cbb099e8 TT |
246 | ret = bfd_close (abfd); |
247 | ||
248 | if (!ret) | |
249 | warning (_("cannot close \"%s\": %s"), | |
250 | name, bfd_errmsg (bfd_get_error ())); | |
251 | ||
252 | return ret; | |
253 | } | |
254 | ||
596f7d67 | 255 | /* See gdb_bfd.h. */ |
cbb099e8 | 256 | |
520b0001 | 257 | void |
cbb099e8 TT |
258 | gdb_bfd_ref (struct bfd *abfd) |
259 | { | |
6ec53d05 | 260 | struct gdb_bfd_data *gdata; |
d6b28940 | 261 | void **slot; |
cbb099e8 TT |
262 | |
263 | if (abfd == NULL) | |
520b0001 | 264 | return; |
cbb099e8 | 265 | |
6ec53d05 | 266 | gdata = bfd_usrdata (abfd); |
cbb099e8 | 267 | |
6ec53d05 | 268 | if (gdata != NULL) |
cbb099e8 | 269 | { |
6ec53d05 | 270 | gdata->refc += 1; |
520b0001 | 271 | return; |
cbb099e8 TT |
272 | } |
273 | ||
ea9f10bb TT |
274 | /* Ask BFD to decompress sections in bfd_get_full_section_contents. */ |
275 | abfd->flags |= BFD_DECOMPRESS; | |
276 | ||
6ec53d05 TT |
277 | gdata = bfd_zalloc (abfd, sizeof (struct gdb_bfd_data)); |
278 | gdata->refc = 1; | |
279 | gdata->mtime = bfd_get_mtime (abfd); | |
b82d08cd | 280 | gdata->archive_bfd = NULL; |
6ec53d05 | 281 | bfd_usrdata (abfd) = gdata; |
d6b28940 | 282 | |
e992eda4 TT |
283 | bfd_alloc_data (abfd); |
284 | ||
d6b28940 TT |
285 | /* This is the first we've seen it, so add it to the hash table. */ |
286 | slot = htab_find_slot (all_bfds, abfd, INSERT); | |
287 | gdb_assert (slot && !*slot); | |
288 | *slot = abfd; | |
cbb099e8 TT |
289 | } |
290 | ||
596f7d67 | 291 | /* See gdb_bfd.h. */ |
cbb099e8 TT |
292 | |
293 | void | |
294 | gdb_bfd_unref (struct bfd *abfd) | |
295 | { | |
6ec53d05 TT |
296 | struct gdb_bfd_data *gdata; |
297 | struct gdb_bfd_cache_search search; | |
b82d08cd | 298 | bfd *archive_bfd; |
cbb099e8 TT |
299 | |
300 | if (abfd == NULL) | |
301 | return; | |
302 | ||
6ec53d05 TT |
303 | gdata = bfd_usrdata (abfd); |
304 | gdb_assert (gdata->refc >= 1); | |
cbb099e8 | 305 | |
6ec53d05 TT |
306 | gdata->refc -= 1; |
307 | if (gdata->refc > 0) | |
cbb099e8 TT |
308 | return; |
309 | ||
b82d08cd | 310 | archive_bfd = gdata->archive_bfd; |
6ec53d05 TT |
311 | search.filename = bfd_get_filename (abfd); |
312 | ||
313 | if (gdb_bfd_cache && search.filename) | |
314 | { | |
315 | hashval_t hash = htab_hash_string (search.filename); | |
316 | void **slot; | |
317 | ||
318 | search.mtime = gdata->mtime; | |
319 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, | |
320 | NO_INSERT); | |
321 | ||
322 | if (slot && *slot) | |
323 | htab_clear_slot (gdb_bfd_cache, slot); | |
324 | } | |
325 | ||
e992eda4 | 326 | bfd_free_data (abfd); |
cbb099e8 TT |
327 | bfd_usrdata (abfd) = NULL; /* Paranoia. */ |
328 | ||
d6b28940 TT |
329 | htab_remove_elt (all_bfds, abfd); |
330 | ||
cbb099e8 | 331 | gdb_bfd_close_or_warn (abfd); |
b82d08cd TT |
332 | |
333 | gdb_bfd_unref (archive_bfd); | |
cbb099e8 | 334 | } |
4bf44c1c TT |
335 | |
336 | /* A helper function that returns the section data descriptor | |
337 | associated with SECTION. If no such descriptor exists, a new one | |
338 | is allocated and cleared. */ | |
339 | ||
340 | static struct gdb_bfd_section_data * | |
341 | get_section_descriptor (asection *section) | |
342 | { | |
343 | struct gdb_bfd_section_data *result; | |
344 | ||
345 | result = bfd_get_section_userdata (section->owner, section); | |
346 | ||
347 | if (result == NULL) | |
348 | { | |
349 | result = bfd_zalloc (section->owner, sizeof (*result)); | |
350 | bfd_set_section_userdata (section->owner, section, result); | |
351 | } | |
352 | ||
353 | return result; | |
354 | } | |
355 | ||
4bf44c1c TT |
356 | /* See gdb_bfd.h. */ |
357 | ||
358 | const gdb_byte * | |
359 | gdb_bfd_map_section (asection *sectp, bfd_size_type *size) | |
360 | { | |
361 | bfd *abfd; | |
4bf44c1c | 362 | struct gdb_bfd_section_data *descriptor; |
ea9f10bb | 363 | bfd_byte *data; |
4bf44c1c TT |
364 | |
365 | gdb_assert ((sectp->flags & SEC_RELOC) == 0); | |
366 | gdb_assert (size != NULL); | |
367 | ||
368 | abfd = sectp->owner; | |
369 | ||
370 | descriptor = get_section_descriptor (sectp); | |
371 | ||
372 | /* If the data was already read for this BFD, just reuse it. */ | |
373 | if (descriptor->data != NULL) | |
374 | goto done; | |
375 | ||
ea9f10bb TT |
376 | #ifdef HAVE_MMAP |
377 | if (!bfd_is_section_compressed (abfd, sectp)) | |
4bf44c1c | 378 | { |
ea9f10bb TT |
379 | /* The page size, used when mmapping. */ |
380 | static int pagesize; | |
4bf44c1c | 381 | |
ea9f10bb TT |
382 | if (pagesize == 0) |
383 | pagesize = getpagesize (); | |
384 | ||
385 | /* Only try to mmap sections which are large enough: we don't want | |
386 | to waste space due to fragmentation. */ | |
387 | ||
388 | if (bfd_get_section_size (sectp) > 4 * pagesize) | |
389 | { | |
390 | descriptor->size = bfd_get_section_size (sectp); | |
391 | descriptor->data = bfd_mmap (abfd, 0, descriptor->size, PROT_READ, | |
392 | MAP_PRIVATE, sectp->filepos, | |
393 | &descriptor->map_addr, | |
394 | &descriptor->map_len); | |
395 | ||
396 | if ((caddr_t)descriptor->data != MAP_FAILED) | |
397 | { | |
4bf44c1c | 398 | #if HAVE_POSIX_MADVISE |
ea9f10bb TT |
399 | posix_madvise (descriptor->map_addr, descriptor->map_len, |
400 | POSIX_MADV_WILLNEED); | |
4bf44c1c | 401 | #endif |
ea9f10bb TT |
402 | goto done; |
403 | } | |
4bf44c1c | 404 | |
ea9f10bb TT |
405 | /* On failure, clear out the section data and try again. */ |
406 | memset (descriptor, 0, sizeof (*descriptor)); | |
407 | } | |
408 | } | |
4bf44c1c TT |
409 | #endif /* HAVE_MMAP */ |
410 | ||
ea9f10bb TT |
411 | /* Handle compressed sections, or ordinary uncompressed sections in |
412 | the no-mmap case. */ | |
4bf44c1c TT |
413 | |
414 | descriptor->size = bfd_get_section_size (sectp); | |
ea9f10bb | 415 | descriptor->data = NULL; |
4bf44c1c | 416 | |
ea9f10bb TT |
417 | data = NULL; |
418 | if (!bfd_get_full_section_contents (abfd, sectp, &data)) | |
419 | error (_("Can't read data for section '%s' in file '%s'"), | |
420 | bfd_get_section_name (abfd, sectp), | |
421 | bfd_get_filename (abfd)); | |
422 | descriptor->data = data; | |
4bf44c1c TT |
423 | |
424 | done: | |
425 | gdb_assert (descriptor->data != NULL); | |
426 | *size = descriptor->size; | |
427 | return descriptor->data; | |
428 | } | |
64c31149 | 429 | |
dccee2de TT |
430 | /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and |
431 | return 1. Otherwise print a warning and return 0. ABFD seek position is | |
432 | not preserved. */ | |
433 | ||
434 | static int | |
435 | get_file_crc (bfd *abfd, unsigned long *file_crc_return) | |
436 | { | |
437 | unsigned long file_crc = 0; | |
438 | ||
439 | if (bfd_seek (abfd, 0, SEEK_SET) != 0) | |
440 | { | |
441 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
442 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
443 | return 0; | |
444 | } | |
445 | ||
446 | for (;;) | |
447 | { | |
448 | gdb_byte buffer[8 * 1024]; | |
449 | bfd_size_type count; | |
450 | ||
451 | count = bfd_bread (buffer, sizeof (buffer), abfd); | |
452 | if (count == (bfd_size_type) -1) | |
453 | { | |
454 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
455 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
456 | return 0; | |
457 | } | |
458 | if (count == 0) | |
459 | break; | |
460 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); | |
461 | } | |
462 | ||
463 | *file_crc_return = file_crc; | |
464 | return 1; | |
465 | } | |
466 | ||
467 | /* See gdb_bfd.h. */ | |
468 | ||
469 | int | |
470 | gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out) | |
471 | { | |
472 | struct gdb_bfd_data *gdata = bfd_usrdata (abfd); | |
473 | ||
474 | if (!gdata->crc_computed) | |
475 | gdata->crc_computed = get_file_crc (abfd, &gdata->crc); | |
476 | ||
477 | if (gdata->crc_computed) | |
478 | *crc_out = gdata->crc; | |
479 | return gdata->crc_computed; | |
480 | } | |
481 | ||
64c31149 TT |
482 | \f |
483 | ||
484 | /* See gdb_bfd.h. */ | |
485 | ||
486 | bfd * | |
487 | gdb_bfd_fopen (const char *filename, const char *target, const char *mode, | |
488 | int fd) | |
489 | { | |
490 | bfd *result = bfd_fopen (filename, target, mode, fd); | |
491 | ||
492 | if (result) | |
493 | { | |
494 | gdb_bfd_stash_filename (result); | |
495 | gdb_bfd_ref (result); | |
496 | } | |
497 | ||
498 | return result; | |
499 | } | |
500 | ||
501 | /* See gdb_bfd.h. */ | |
502 | ||
503 | bfd * | |
504 | gdb_bfd_openr (const char *filename, const char *target) | |
505 | { | |
506 | bfd *result = bfd_openr (filename, target); | |
507 | ||
508 | if (result) | |
509 | { | |
510 | gdb_bfd_stash_filename (result); | |
511 | gdb_bfd_ref (result); | |
512 | } | |
513 | ||
514 | return result; | |
515 | } | |
516 | ||
517 | /* See gdb_bfd.h. */ | |
518 | ||
519 | bfd * | |
520 | gdb_bfd_openw (const char *filename, const char *target) | |
521 | { | |
522 | bfd *result = bfd_openw (filename, target); | |
523 | ||
524 | if (result) | |
525 | { | |
526 | gdb_bfd_stash_filename (result); | |
527 | gdb_bfd_ref (result); | |
528 | } | |
529 | ||
530 | return result; | |
531 | } | |
532 | ||
533 | /* See gdb_bfd.h. */ | |
534 | ||
535 | bfd * | |
536 | gdb_bfd_openr_iovec (const char *filename, const char *target, | |
537 | void *(*open_func) (struct bfd *nbfd, | |
538 | void *open_closure), | |
539 | void *open_closure, | |
540 | file_ptr (*pread_func) (struct bfd *nbfd, | |
541 | void *stream, | |
542 | void *buf, | |
543 | file_ptr nbytes, | |
544 | file_ptr offset), | |
545 | int (*close_func) (struct bfd *nbfd, | |
546 | void *stream), | |
547 | int (*stat_func) (struct bfd *abfd, | |
548 | void *stream, | |
549 | struct stat *sb)) | |
550 | { | |
551 | bfd *result = bfd_openr_iovec (filename, target, | |
552 | open_func, open_closure, | |
553 | pread_func, close_func, stat_func); | |
554 | ||
555 | if (result) | |
556 | { | |
557 | gdb_bfd_ref (result); | |
558 | gdb_bfd_stash_filename (result); | |
559 | } | |
560 | ||
561 | return result; | |
562 | } | |
563 | ||
564 | /* See gdb_bfd.h. */ | |
565 | ||
0cd61f44 TT |
566 | void |
567 | gdb_bfd_mark_parent (bfd *child, bfd *parent) | |
568 | { | |
569 | struct gdb_bfd_data *gdata; | |
570 | ||
571 | gdb_bfd_ref (child); | |
572 | /* No need to stash the filename here, because we also keep a | |
573 | reference on the parent archive. */ | |
574 | ||
575 | gdata = bfd_usrdata (child); | |
576 | if (gdata->archive_bfd == NULL) | |
577 | { | |
578 | gdata->archive_bfd = parent; | |
579 | gdb_bfd_ref (parent); | |
580 | } | |
581 | else | |
582 | gdb_assert (gdata->archive_bfd == parent); | |
583 | } | |
584 | ||
585 | /* See gdb_bfd.h. */ | |
586 | ||
64c31149 TT |
587 | bfd * |
588 | gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous) | |
589 | { | |
590 | bfd *result = bfd_openr_next_archived_file (archive, previous); | |
591 | ||
592 | if (result) | |
0cd61f44 | 593 | gdb_bfd_mark_parent (result, archive); |
64c31149 TT |
594 | |
595 | return result; | |
596 | } | |
597 | ||
598 | /* See gdb_bfd.h. */ | |
599 | ||
600 | bfd * | |
601 | gdb_bfd_fdopenr (const char *filename, const char *target, int fd) | |
602 | { | |
603 | bfd *result = bfd_fdopenr (filename, target, fd); | |
604 | ||
605 | if (result) | |
606 | { | |
607 | gdb_bfd_ref (result); | |
608 | gdb_bfd_stash_filename (result); | |
609 | } | |
610 | ||
611 | return result; | |
612 | } | |
d6b28940 TT |
613 | |
614 | \f | |
615 | ||
65cf3563 TT |
616 | gdb_static_assert (ARRAY_SIZE (_bfd_std_section) == 4); |
617 | ||
618 | /* See gdb_bfd.h. */ | |
619 | ||
620 | int | |
621 | gdb_bfd_section_index (bfd *abfd, asection *section) | |
622 | { | |
623 | if (section == NULL) | |
624 | return -1; | |
625 | else if (section == bfd_com_section_ptr) | |
626 | return bfd_count_sections (abfd) + 1; | |
627 | else if (section == bfd_und_section_ptr) | |
628 | return bfd_count_sections (abfd) + 2; | |
629 | else if (section == bfd_abs_section_ptr) | |
630 | return bfd_count_sections (abfd) + 3; | |
631 | else if (section == bfd_ind_section_ptr) | |
632 | return bfd_count_sections (abfd) + 4; | |
633 | return section->index; | |
634 | } | |
635 | ||
636 | /* See gdb_bfd.h. */ | |
637 | ||
638 | int | |
639 | gdb_bfd_count_sections (bfd *abfd) | |
640 | { | |
641 | return bfd_count_sections (abfd) + 4; | |
642 | } | |
643 | ||
1da77581 TT |
644 | /* See gdb_bfd.h. */ |
645 | ||
646 | int | |
647 | gdb_bfd_requires_relocations (bfd *abfd) | |
648 | { | |
649 | struct gdb_bfd_data *gdata = bfd_usrdata (abfd); | |
650 | ||
651 | if (gdata->relocation_computed == 0) | |
652 | { | |
653 | asection *sect; | |
654 | ||
655 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
656 | if ((sect->flags & SEC_RELOC) != 0) | |
657 | { | |
658 | gdata->needs_relocations = 1; | |
659 | break; | |
660 | } | |
661 | ||
662 | gdata->relocation_computed = 1; | |
663 | } | |
664 | ||
665 | return gdata->needs_relocations; | |
666 | } | |
667 | ||
65cf3563 TT |
668 | \f |
669 | ||
d6b28940 TT |
670 | /* A callback for htab_traverse that prints a single BFD. */ |
671 | ||
672 | static int | |
673 | print_one_bfd (void **slot, void *data) | |
674 | { | |
675 | bfd *abfd = *slot; | |
676 | struct gdb_bfd_data *gdata = bfd_usrdata (abfd); | |
677 | struct ui_out *uiout = data; | |
678 | struct cleanup *inner; | |
679 | ||
680 | inner = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); | |
681 | ui_out_field_int (uiout, "refcount", gdata->refc); | |
682 | ui_out_field_string (uiout, "addr", host_address_to_string (abfd)); | |
683 | ui_out_field_string (uiout, "filename", bfd_get_filename (abfd)); | |
684 | ui_out_text (uiout, "\n"); | |
685 | do_cleanups (inner); | |
686 | ||
687 | return 1; | |
688 | } | |
689 | ||
690 | /* Implement the 'maint info bfd' command. */ | |
691 | ||
692 | static void | |
693 | maintenance_info_bfds (char *arg, int from_tty) | |
694 | { | |
695 | struct cleanup *cleanup; | |
696 | struct ui_out *uiout = current_uiout; | |
697 | ||
698 | cleanup = make_cleanup_ui_out_table_begin_end (uiout, 3, -1, "bfds"); | |
699 | ui_out_table_header (uiout, 10, ui_left, "refcount", "Refcount"); | |
700 | ui_out_table_header (uiout, 18, ui_left, "addr", "Address"); | |
701 | ui_out_table_header (uiout, 40, ui_left, "filename", "Filename"); | |
702 | ||
703 | ui_out_table_body (uiout); | |
704 | htab_traverse (all_bfds, print_one_bfd, uiout); | |
705 | ||
706 | do_cleanups (cleanup); | |
707 | } | |
708 | ||
709 | /* -Wmissing-prototypes */ | |
710 | extern initialize_file_ftype _initialize_gdb_bfd; | |
711 | ||
712 | void | |
713 | _initialize_gdb_bfd (void) | |
714 | { | |
715 | all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
716 | NULL, xcalloc, xfree); | |
717 | ||
718 | add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\ | |
719 | List the BFDs that are currently open."), | |
720 | &maintenanceinfolist); | |
721 | } |