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Commit | Line | Data |
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cbb099e8 TT |
1 | /* Definitions for BFD wrappers used by GDB. |
2 | ||
3666a048 | 3 | Copyright (C) 2011-2021 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" | |
d6b28940 TT |
22 | #include "ui-out.h" |
23 | #include "gdbcmd.h" | |
6ec53d05 | 24 | #include "hashtab.h" |
268a13a5 | 25 | #include "gdbsupport/filestuff.h" |
4bf44c1c TT |
26 | #ifdef HAVE_MMAP |
27 | #include <sys/mman.h> | |
28 | #ifndef MAP_FAILED | |
29 | #define MAP_FAILED ((void *) -1) | |
30 | #endif | |
31 | #endif | |
f08e97fe GB |
32 | #include "target.h" |
33 | #include "gdb/fileio.h" | |
07c138c8 | 34 | #include "inferior.h" |
4bf44c1c TT |
35 | |
36 | /* An object of this type is stored in the section's user data when | |
37 | mapping a section. */ | |
38 | ||
39 | struct gdb_bfd_section_data | |
40 | { | |
41 | /* Size of the data. */ | |
42 | bfd_size_type size; | |
43 | /* If the data was mmapped, this is the length of the map. */ | |
44 | bfd_size_type map_len; | |
45 | /* The data. If NULL, the section data has not been read. */ | |
46 | void *data; | |
47 | /* If the data was mmapped, this is the map address. */ | |
48 | void *map_addr; | |
49 | }; | |
a4453b7e | 50 | |
d6b28940 TT |
51 | /* A hash table holding every BFD that gdb knows about. This is not |
52 | to be confused with 'gdb_bfd_cache', which is used for sharing | |
53 | BFDs; in contrast, this hash is used just to implement | |
54 | "maint info bfd". */ | |
55 | ||
56 | static htab_t all_bfds; | |
57 | ||
6ec53d05 TT |
58 | /* An object of this type is stored in each BFD's user data. */ |
59 | ||
60 | struct gdb_bfd_data | |
61 | { | |
3cae4447 TT |
62 | /* Note that if ST is nullptr, then we simply fill in zeroes. */ |
63 | gdb_bfd_data (bfd *abfd, struct stat *st) | |
64 | : mtime (st == nullptr ? 0 : st->st_mtime), | |
65 | size (st == nullptr ? 0 : st->st_size), | |
66 | inode (st == nullptr ? 0 : st->st_ino), | |
67 | device_id (st == nullptr ? 0 : st->st_dev), | |
06d5bbc8 TT |
68 | relocation_computed (0), |
69 | needs_relocations (0), | |
70 | crc_computed (0) | |
71 | { | |
06d5bbc8 TT |
72 | } |
73 | ||
74 | ~gdb_bfd_data () | |
75 | { | |
06d5bbc8 TT |
76 | } |
77 | ||
6ec53d05 | 78 | /* The reference count. */ |
06d5bbc8 | 79 | int refc = 1; |
6ec53d05 TT |
80 | |
81 | /* The mtime of the BFD at the point the cache entry was made. */ | |
82 | time_t mtime; | |
b82d08cd | 83 | |
c04fe68f AB |
84 | /* The file size (in bytes) at the point the cache entry was made. */ |
85 | off_t size; | |
86 | ||
87 | /* The inode of the file at the point the cache entry was made. */ | |
88 | ino_t inode; | |
89 | ||
90 | /* The device id of the file at the point the cache entry was made. */ | |
91 | dev_t device_id; | |
92 | ||
1da77581 TT |
93 | /* This is true if we have determined whether this BFD has any |
94 | sections requiring relocation. */ | |
95 | unsigned int relocation_computed : 1; | |
96 | ||
97 | /* This is true if any section needs relocation. */ | |
98 | unsigned int needs_relocations : 1; | |
99 | ||
dccee2de TT |
100 | /* This is true if we have successfully computed the file's CRC. */ |
101 | unsigned int crc_computed : 1; | |
102 | ||
103 | /* The file's CRC. */ | |
06d5bbc8 | 104 | unsigned long crc = 0; |
dccee2de | 105 | |
b82d08cd TT |
106 | /* If the BFD comes from an archive, this points to the archive's |
107 | BFD. Otherwise, this is NULL. */ | |
06d5bbc8 | 108 | bfd *archive_bfd = nullptr; |
e992eda4 | 109 | |
13aaf454 | 110 | /* Table of all the bfds this bfd has included. */ |
d5833c62 | 111 | std::vector<gdb_bfd_ref_ptr> included_bfds; |
13aaf454 | 112 | |
e992eda4 | 113 | /* The registry. */ |
06d5bbc8 | 114 | REGISTRY_FIELDS = {}; |
6ec53d05 TT |
115 | }; |
116 | ||
e992eda4 TT |
117 | #define GDB_BFD_DATA_ACCESSOR(ABFD) \ |
118 | ((struct gdb_bfd_data *) bfd_usrdata (ABFD)) | |
119 | ||
120 | DEFINE_REGISTRY (bfd, GDB_BFD_DATA_ACCESSOR) | |
121 | ||
6ec53d05 TT |
122 | /* A hash table storing all the BFDs maintained in the cache. */ |
123 | ||
124 | static htab_t gdb_bfd_cache; | |
125 | ||
18989b3c AB |
126 | /* When true gdb will reuse an existing bfd object if the filename, |
127 | modification time, and file size all match. */ | |
128 | ||
491144b5 | 129 | static bool bfd_sharing = true; |
18989b3c AB |
130 | static void |
131 | show_bfd_sharing (struct ui_file *file, int from_tty, | |
132 | struct cmd_list_element *c, const char *value) | |
133 | { | |
134 | fprintf_filtered (file, _("BFD sharing is %s.\n"), value); | |
135 | } | |
136 | ||
566f5e3b AB |
137 | /* When non-zero debugging of the bfd caches is enabled. */ |
138 | ||
139 | static unsigned int debug_bfd_cache; | |
140 | static void | |
141 | show_bfd_cache_debug (struct ui_file *file, int from_tty, | |
142 | struct cmd_list_element *c, const char *value) | |
143 | { | |
144 | fprintf_filtered (file, _("BFD cache debugging is %s.\n"), value); | |
145 | } | |
146 | ||
6ec53d05 TT |
147 | /* The type of an object being looked up in gdb_bfd_cache. We use |
148 | htab's capability of storing one kind of object (BFD in this case) | |
149 | and using a different sort of object for searching. */ | |
150 | ||
151 | struct gdb_bfd_cache_search | |
152 | { | |
153 | /* The filename. */ | |
154 | const char *filename; | |
155 | /* The mtime. */ | |
156 | time_t mtime; | |
c04fe68f AB |
157 | /* The file size (in bytes). */ |
158 | off_t size; | |
159 | /* The inode of the file. */ | |
160 | ino_t inode; | |
161 | /* The device id of the file. */ | |
162 | dev_t device_id; | |
6ec53d05 TT |
163 | }; |
164 | ||
165 | /* A hash function for BFDs. */ | |
166 | ||
167 | static hashval_t | |
168 | hash_bfd (const void *b) | |
169 | { | |
9a3c8263 | 170 | const bfd *abfd = (const struct bfd *) b; |
6ec53d05 TT |
171 | |
172 | /* It is simplest to just hash the filename. */ | |
173 | return htab_hash_string (bfd_get_filename (abfd)); | |
174 | } | |
175 | ||
176 | /* An equality function for BFDs. Note that this expects the caller | |
177 | to search using struct gdb_bfd_cache_search only, not BFDs. */ | |
178 | ||
179 | static int | |
180 | eq_bfd (const void *a, const void *b) | |
181 | { | |
9a3c8263 SM |
182 | const bfd *abfd = (const struct bfd *) a; |
183 | const struct gdb_bfd_cache_search *s | |
184 | = (const struct gdb_bfd_cache_search *) b; | |
185 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
6ec53d05 TT |
186 | |
187 | return (gdata->mtime == s->mtime | |
c04fe68f AB |
188 | && gdata->size == s->size |
189 | && gdata->inode == s->inode | |
190 | && gdata->device_id == s->device_id | |
6ec53d05 TT |
191 | && strcmp (bfd_get_filename (abfd), s->filename) == 0); |
192 | } | |
193 | ||
194 | /* See gdb_bfd.h. */ | |
195 | ||
f08e97fe GB |
196 | int |
197 | is_target_filename (const char *name) | |
198 | { | |
199 | return startswith (name, TARGET_SYSROOT_PREFIX); | |
200 | } | |
201 | ||
202 | /* See gdb_bfd.h. */ | |
203 | ||
204 | int | |
205 | gdb_bfd_has_target_filename (struct bfd *abfd) | |
206 | { | |
207 | return is_target_filename (bfd_get_filename (abfd)); | |
208 | } | |
209 | ||
15cc148f MS |
210 | /* For `gdb_bfd_open_from_target_memory`. */ |
211 | ||
212 | struct target_buffer | |
213 | { | |
214 | CORE_ADDR base; | |
215 | ULONGEST size; | |
216 | }; | |
217 | ||
218 | /* For `gdb_bfd_open_from_target_memory`. Opening the file is a no-op. */ | |
219 | ||
220 | static void * | |
221 | mem_bfd_iovec_open (struct bfd *abfd, void *open_closure) | |
222 | { | |
223 | return open_closure; | |
224 | } | |
225 | ||
226 | /* For `gdb_bfd_open_from_target_memory`. Closing the file is just freeing the | |
227 | base/size pair on our side. */ | |
228 | ||
229 | static int | |
230 | mem_bfd_iovec_close (struct bfd *abfd, void *stream) | |
231 | { | |
232 | xfree (stream); | |
233 | ||
234 | /* Zero means success. */ | |
235 | return 0; | |
236 | } | |
237 | ||
238 | /* For `gdb_bfd_open_from_target_memory`. For reading the file, we just need to | |
239 | pass through to target_read_memory and fix up the arguments and return | |
240 | values. */ | |
241 | ||
242 | static file_ptr | |
243 | mem_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
244 | file_ptr nbytes, file_ptr offset) | |
245 | { | |
246 | int err; | |
247 | struct target_buffer *buffer = (struct target_buffer *) stream; | |
248 | ||
249 | /* If this read will read all of the file, limit it to just the rest. */ | |
250 | if (offset + nbytes > buffer->size) | |
251 | nbytes = buffer->size - offset; | |
252 | ||
253 | /* If there are no more bytes left, we've reached EOF. */ | |
254 | if (nbytes == 0) | |
255 | return 0; | |
256 | ||
257 | err = target_read_memory (buffer->base + offset, (gdb_byte *) buf, nbytes); | |
258 | if (err) | |
259 | return -1; | |
260 | ||
261 | return nbytes; | |
262 | } | |
263 | ||
264 | /* For `gdb_bfd_open_from_target_memory`. For statting the file, we only | |
265 | support the st_size attribute. */ | |
266 | ||
267 | static int | |
268 | mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
269 | { | |
270 | struct target_buffer *buffer = (struct target_buffer*) stream; | |
271 | ||
272 | memset (sb, 0, sizeof (struct stat)); | |
273 | sb->st_size = buffer->size; | |
274 | return 0; | |
275 | } | |
276 | ||
277 | /* See gdb_bfd.h. */ | |
278 | ||
279 | gdb_bfd_ref_ptr | |
280 | gdb_bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, | |
281 | const char *target, | |
282 | const char *filename) | |
283 | { | |
284 | struct target_buffer *buffer = XNEW (struct target_buffer); | |
285 | ||
286 | buffer->base = addr; | |
287 | buffer->size = size; | |
288 | return gdb_bfd_openr_iovec (filename ? filename : "<in-memory>", target, | |
289 | mem_bfd_iovec_open, | |
290 | buffer, | |
291 | mem_bfd_iovec_pread, | |
292 | mem_bfd_iovec_close, | |
293 | mem_bfd_iovec_stat); | |
294 | } | |
f08e97fe GB |
295 | |
296 | /* Return the system error number corresponding to ERRNUM. */ | |
297 | ||
298 | static int | |
299 | fileio_errno_to_host (int errnum) | |
300 | { | |
301 | switch (errnum) | |
302 | { | |
303 | case FILEIO_EPERM: | |
dda83cd7 | 304 | return EPERM; |
f08e97fe | 305 | case FILEIO_ENOENT: |
dda83cd7 | 306 | return ENOENT; |
f08e97fe | 307 | case FILEIO_EINTR: |
dda83cd7 | 308 | return EINTR; |
f08e97fe | 309 | case FILEIO_EIO: |
dda83cd7 | 310 | return EIO; |
f08e97fe | 311 | case FILEIO_EBADF: |
dda83cd7 | 312 | return EBADF; |
f08e97fe | 313 | case FILEIO_EACCES: |
dda83cd7 | 314 | return EACCES; |
f08e97fe | 315 | case FILEIO_EFAULT: |
dda83cd7 | 316 | return EFAULT; |
f08e97fe | 317 | case FILEIO_EBUSY: |
dda83cd7 | 318 | return EBUSY; |
f08e97fe | 319 | case FILEIO_EEXIST: |
dda83cd7 | 320 | return EEXIST; |
f08e97fe | 321 | case FILEIO_ENODEV: |
dda83cd7 | 322 | return ENODEV; |
f08e97fe | 323 | case FILEIO_ENOTDIR: |
dda83cd7 | 324 | return ENOTDIR; |
f08e97fe | 325 | case FILEIO_EISDIR: |
dda83cd7 | 326 | return EISDIR; |
f08e97fe | 327 | case FILEIO_EINVAL: |
dda83cd7 | 328 | return EINVAL; |
f08e97fe | 329 | case FILEIO_ENFILE: |
dda83cd7 | 330 | return ENFILE; |
f08e97fe | 331 | case FILEIO_EMFILE: |
dda83cd7 | 332 | return EMFILE; |
f08e97fe | 333 | case FILEIO_EFBIG: |
dda83cd7 | 334 | return EFBIG; |
f08e97fe | 335 | case FILEIO_ENOSPC: |
dda83cd7 | 336 | return ENOSPC; |
f08e97fe | 337 | case FILEIO_ESPIPE: |
dda83cd7 | 338 | return ESPIPE; |
f08e97fe | 339 | case FILEIO_EROFS: |
dda83cd7 | 340 | return EROFS; |
f08e97fe | 341 | case FILEIO_ENOSYS: |
dda83cd7 | 342 | return ENOSYS; |
f08e97fe | 343 | case FILEIO_ENAMETOOLONG: |
dda83cd7 | 344 | return ENAMETOOLONG; |
f08e97fe GB |
345 | } |
346 | return -1; | |
347 | } | |
348 | ||
98c59b52 PA |
349 | /* bfd_openr_iovec OPEN_CLOSURE data for gdb_bfd_open. */ |
350 | struct gdb_bfd_open_closure | |
351 | { | |
352 | inferior *inf; | |
353 | bool warn_if_slow; | |
354 | }; | |
355 | ||
f08e97fe | 356 | /* Wrapper for target_fileio_open suitable for passing as the |
98c59b52 | 357 | OPEN_FUNC argument to gdb_bfd_openr_iovec. */ |
f08e97fe GB |
358 | |
359 | static void * | |
98c59b52 | 360 | gdb_bfd_iovec_fileio_open (struct bfd *abfd, void *open_closure) |
f08e97fe GB |
361 | { |
362 | const char *filename = bfd_get_filename (abfd); | |
363 | int fd, target_errno; | |
364 | int *stream; | |
98c59b52 | 365 | gdb_bfd_open_closure *oclosure = (gdb_bfd_open_closure *) open_closure; |
f08e97fe GB |
366 | |
367 | gdb_assert (is_target_filename (filename)); | |
368 | ||
98c59b52 | 369 | fd = target_fileio_open (oclosure->inf, |
4111f652 | 370 | filename + strlen (TARGET_SYSROOT_PREFIX), |
98c59b52 | 371 | FILEIO_O_RDONLY, 0, oclosure->warn_if_slow, |
4111f652 | 372 | &target_errno); |
f08e97fe GB |
373 | if (fd == -1) |
374 | { | |
375 | errno = fileio_errno_to_host (target_errno); | |
376 | bfd_set_error (bfd_error_system_call); | |
377 | return NULL; | |
378 | } | |
379 | ||
380 | stream = XCNEW (int); | |
381 | *stream = fd; | |
382 | return stream; | |
383 | } | |
384 | ||
385 | /* Wrapper for target_fileio_pread suitable for passing as the | |
386 | PREAD_FUNC argument to gdb_bfd_openr_iovec. */ | |
387 | ||
388 | static file_ptr | |
389 | gdb_bfd_iovec_fileio_pread (struct bfd *abfd, void *stream, void *buf, | |
390 | file_ptr nbytes, file_ptr offset) | |
391 | { | |
392 | int fd = *(int *) stream; | |
393 | int target_errno; | |
394 | file_ptr pos, bytes; | |
395 | ||
396 | pos = 0; | |
397 | while (nbytes > pos) | |
398 | { | |
2d7711a3 GB |
399 | QUIT; |
400 | ||
f08e97fe GB |
401 | bytes = target_fileio_pread (fd, (gdb_byte *) buf + pos, |
402 | nbytes - pos, offset + pos, | |
403 | &target_errno); | |
404 | if (bytes == 0) | |
dda83cd7 SM |
405 | /* Success, but no bytes, means end-of-file. */ |
406 | break; | |
f08e97fe GB |
407 | if (bytes == -1) |
408 | { | |
409 | errno = fileio_errno_to_host (target_errno); | |
410 | bfd_set_error (bfd_error_system_call); | |
411 | return -1; | |
412 | } | |
413 | ||
414 | pos += bytes; | |
415 | } | |
416 | ||
417 | return pos; | |
418 | } | |
419 | ||
420 | /* Wrapper for target_fileio_close suitable for passing as the | |
421 | CLOSE_FUNC argument to gdb_bfd_openr_iovec. */ | |
422 | ||
423 | static int | |
424 | gdb_bfd_iovec_fileio_close (struct bfd *abfd, void *stream) | |
425 | { | |
426 | int fd = *(int *) stream; | |
427 | int target_errno; | |
428 | ||
429 | xfree (stream); | |
430 | ||
431 | /* Ignore errors on close. These may happen with remote | |
432 | targets if the connection has already been torn down. */ | |
433 | target_fileio_close (fd, &target_errno); | |
434 | ||
435 | /* Zero means success. */ | |
436 | return 0; | |
437 | } | |
438 | ||
439 | /* Wrapper for target_fileio_fstat suitable for passing as the | |
440 | STAT_FUNC argument to gdb_bfd_openr_iovec. */ | |
441 | ||
442 | static int | |
443 | gdb_bfd_iovec_fileio_fstat (struct bfd *abfd, void *stream, | |
444 | struct stat *sb) | |
445 | { | |
446 | int fd = *(int *) stream; | |
447 | int target_errno; | |
448 | int result; | |
449 | ||
450 | result = target_fileio_fstat (fd, sb, &target_errno); | |
451 | if (result == -1) | |
452 | { | |
453 | errno = fileio_errno_to_host (target_errno); | |
454 | bfd_set_error (bfd_error_system_call); | |
455 | } | |
456 | ||
457 | return result; | |
458 | } | |
459 | ||
3cae4447 TT |
460 | /* A helper function to initialize the data that gdb attaches to each |
461 | BFD. */ | |
462 | ||
463 | static void | |
464 | gdb_bfd_init_data (struct bfd *abfd, struct stat *st) | |
465 | { | |
466 | struct gdb_bfd_data *gdata; | |
467 | void **slot; | |
468 | ||
469 | gdb_assert (bfd_usrdata (abfd) == nullptr); | |
470 | ||
471 | /* Ask BFD to decompress sections in bfd_get_full_section_contents. */ | |
472 | abfd->flags |= BFD_DECOMPRESS; | |
473 | ||
474 | gdata = new gdb_bfd_data (abfd, st); | |
475 | bfd_set_usrdata (abfd, gdata); | |
476 | bfd_alloc_data (abfd); | |
477 | ||
478 | /* This is the first we've seen it, so add it to the hash table. */ | |
479 | slot = htab_find_slot (all_bfds, abfd, INSERT); | |
480 | gdb_assert (slot && !*slot); | |
481 | *slot = abfd; | |
482 | } | |
483 | ||
f08e97fe GB |
484 | /* See gdb_bfd.h. */ |
485 | ||
192b62ce | 486 | gdb_bfd_ref_ptr |
98c59b52 PA |
487 | gdb_bfd_open (const char *name, const char *target, int fd, |
488 | bool warn_if_slow) | |
6ec53d05 TT |
489 | { |
490 | hashval_t hash; | |
491 | void **slot; | |
492 | bfd *abfd; | |
493 | struct gdb_bfd_cache_search search; | |
494 | struct stat st; | |
495 | ||
f08e97fe GB |
496 | if (is_target_filename (name)) |
497 | { | |
498 | if (!target_filesystem_is_local ()) | |
499 | { | |
500 | gdb_assert (fd == -1); | |
501 | ||
98c59b52 | 502 | gdb_bfd_open_closure open_closure { current_inferior (), warn_if_slow }; |
e3dd7556 | 503 | return gdb_bfd_openr_iovec (name, target, |
07c138c8 | 504 | gdb_bfd_iovec_fileio_open, |
98c59b52 | 505 | &open_closure, |
f08e97fe GB |
506 | gdb_bfd_iovec_fileio_pread, |
507 | gdb_bfd_iovec_fileio_close, | |
508 | gdb_bfd_iovec_fileio_fstat); | |
f08e97fe GB |
509 | } |
510 | ||
511 | name += strlen (TARGET_SYSROOT_PREFIX); | |
512 | } | |
513 | ||
6ec53d05 TT |
514 | if (gdb_bfd_cache == NULL) |
515 | gdb_bfd_cache = htab_create_alloc (1, hash_bfd, eq_bfd, NULL, | |
516 | xcalloc, xfree); | |
517 | ||
518 | if (fd == -1) | |
519 | { | |
614c279d | 520 | fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0); |
6ec53d05 TT |
521 | if (fd == -1) |
522 | { | |
523 | bfd_set_error (bfd_error_system_call); | |
524 | return NULL; | |
525 | } | |
526 | } | |
527 | ||
6ec53d05 TT |
528 | if (fstat (fd, &st) < 0) |
529 | { | |
3cae4447 TT |
530 | /* Weird situation here -- don't cache if we can't stat. */ |
531 | if (debug_bfd_cache) | |
532 | fprintf_unfiltered (gdb_stdlog, | |
03b0a45f TT |
533 | "Could not stat %s - not caching\n", |
534 | name); | |
535 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); | |
536 | if (abfd == nullptr) | |
537 | return nullptr; | |
3cae4447 | 538 | return gdb_bfd_ref_ptr::new_reference (abfd); |
c04fe68f | 539 | } |
6ec53d05 | 540 | |
3cae4447 TT |
541 | search.filename = name; |
542 | search.mtime = st.st_mtime; | |
543 | search.size = st.st_size; | |
544 | search.inode = st.st_ino; | |
545 | search.device_id = st.st_dev; | |
546 | ||
6ec53d05 TT |
547 | /* Note that this must compute the same result as hash_bfd. */ |
548 | hash = htab_hash_string (name); | |
549 | /* Note that we cannot use htab_find_slot_with_hash here, because | |
550 | opening the BFD may fail; and this would violate hashtab | |
551 | invariants. */ | |
9a3c8263 | 552 | abfd = (struct bfd *) htab_find_with_hash (gdb_bfd_cache, &search, hash); |
18989b3c | 553 | if (bfd_sharing && abfd != NULL) |
6ec53d05 | 554 | { |
566f5e3b AB |
555 | if (debug_bfd_cache) |
556 | fprintf_unfiltered (gdb_stdlog, | |
557 | "Reusing cached bfd %s for %s\n", | |
558 | host_address_to_string (abfd), | |
559 | bfd_get_filename (abfd)); | |
6ec53d05 | 560 | close (fd); |
1831a9f9 | 561 | return gdb_bfd_ref_ptr::new_reference (abfd); |
6ec53d05 TT |
562 | } |
563 | ||
564 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); | |
565 | if (abfd == NULL) | |
566 | return NULL; | |
567 | ||
566f5e3b AB |
568 | if (debug_bfd_cache) |
569 | fprintf_unfiltered (gdb_stdlog, | |
570 | "Creating new bfd %s for %s\n", | |
571 | host_address_to_string (abfd), | |
572 | bfd_get_filename (abfd)); | |
573 | ||
18989b3c AB |
574 | if (bfd_sharing) |
575 | { | |
576 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, INSERT); | |
577 | gdb_assert (!*slot); | |
578 | *slot = abfd; | |
579 | } | |
6ec53d05 | 580 | |
3cae4447 TT |
581 | /* It's important to pass the already-computed stat info here, |
582 | rather than, say, calling gdb_bfd_ref_ptr::new_reference. BFD by | |
583 | default will "stat" the file each time bfd_get_mtime is called -- | |
584 | and since we already entered it into the hash table using this | |
585 | mtime, if the file changed at the wrong moment, the race would | |
586 | lead to a hash table corruption. */ | |
587 | gdb_bfd_init_data (abfd, &st); | |
588 | return gdb_bfd_ref_ptr (abfd); | |
6ec53d05 TT |
589 | } |
590 | ||
4bf44c1c TT |
591 | /* A helper function that releases any section data attached to the |
592 | BFD. */ | |
593 | ||
594 | static void | |
1ce51eb5 | 595 | free_one_bfd_section (asection *sectp) |
4bf44c1c | 596 | { |
9a3c8263 | 597 | struct gdb_bfd_section_data *sect |
fd361982 | 598 | = (struct gdb_bfd_section_data *) bfd_section_userdata (sectp); |
4bf44c1c TT |
599 | |
600 | if (sect != NULL && sect->data != NULL) | |
601 | { | |
602 | #ifdef HAVE_MMAP | |
603 | if (sect->map_addr != NULL) | |
604 | { | |
605 | int res; | |
606 | ||
607 | res = munmap (sect->map_addr, sect->map_len); | |
608 | gdb_assert (res == 0); | |
609 | } | |
610 | else | |
611 | #endif | |
612 | xfree (sect->data); | |
613 | } | |
614 | } | |
615 | ||
cbb099e8 TT |
616 | /* Close ABFD, and warn if that fails. */ |
617 | ||
618 | static int | |
619 | gdb_bfd_close_or_warn (struct bfd *abfd) | |
620 | { | |
621 | int ret; | |
b16c44de | 622 | const char *name = bfd_get_filename (abfd); |
cbb099e8 | 623 | |
1ce51eb5 TT |
624 | for (asection *sect : gdb_bfd_sections (abfd)) |
625 | free_one_bfd_section (sect); | |
4bf44c1c | 626 | |
cbb099e8 TT |
627 | ret = bfd_close (abfd); |
628 | ||
629 | if (!ret) | |
630 | warning (_("cannot close \"%s\": %s"), | |
631 | name, bfd_errmsg (bfd_get_error ())); | |
632 | ||
633 | return ret; | |
634 | } | |
635 | ||
596f7d67 | 636 | /* See gdb_bfd.h. */ |
cbb099e8 | 637 | |
520b0001 | 638 | void |
cbb099e8 TT |
639 | gdb_bfd_ref (struct bfd *abfd) |
640 | { | |
6ec53d05 | 641 | struct gdb_bfd_data *gdata; |
cbb099e8 TT |
642 | |
643 | if (abfd == NULL) | |
520b0001 | 644 | return; |
cbb099e8 | 645 | |
9a3c8263 | 646 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
cbb099e8 | 647 | |
566f5e3b AB |
648 | if (debug_bfd_cache) |
649 | fprintf_unfiltered (gdb_stdlog, | |
650 | "Increase reference count on bfd %s (%s)\n", | |
651 | host_address_to_string (abfd), | |
652 | bfd_get_filename (abfd)); | |
653 | ||
6ec53d05 | 654 | if (gdata != NULL) |
cbb099e8 | 655 | { |
6ec53d05 | 656 | gdata->refc += 1; |
520b0001 | 657 | return; |
cbb099e8 TT |
658 | } |
659 | ||
3cae4447 TT |
660 | /* Caching only happens via gdb_bfd_open, so passing nullptr here is |
661 | fine. */ | |
662 | gdb_bfd_init_data (abfd, nullptr); | |
cbb099e8 TT |
663 | } |
664 | ||
596f7d67 | 665 | /* See gdb_bfd.h. */ |
cbb099e8 TT |
666 | |
667 | void | |
668 | gdb_bfd_unref (struct bfd *abfd) | |
669 | { | |
6ec53d05 TT |
670 | struct gdb_bfd_data *gdata; |
671 | struct gdb_bfd_cache_search search; | |
06d5bbc8 | 672 | bfd *archive_bfd; |
cbb099e8 TT |
673 | |
674 | if (abfd == NULL) | |
675 | return; | |
676 | ||
9a3c8263 | 677 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
6ec53d05 | 678 | gdb_assert (gdata->refc >= 1); |
cbb099e8 | 679 | |
6ec53d05 TT |
680 | gdata->refc -= 1; |
681 | if (gdata->refc > 0) | |
566f5e3b AB |
682 | { |
683 | if (debug_bfd_cache) | |
684 | fprintf_unfiltered (gdb_stdlog, | |
685 | "Decrease reference count on bfd %s (%s)\n", | |
686 | host_address_to_string (abfd), | |
687 | bfd_get_filename (abfd)); | |
688 | return; | |
689 | } | |
690 | ||
691 | if (debug_bfd_cache) | |
692 | fprintf_unfiltered (gdb_stdlog, | |
693 | "Delete final reference count on bfd %s (%s)\n", | |
694 | host_address_to_string (abfd), | |
695 | bfd_get_filename (abfd)); | |
cbb099e8 | 696 | |
b82d08cd | 697 | archive_bfd = gdata->archive_bfd; |
6ec53d05 TT |
698 | search.filename = bfd_get_filename (abfd); |
699 | ||
700 | if (gdb_bfd_cache && search.filename) | |
701 | { | |
702 | hashval_t hash = htab_hash_string (search.filename); | |
703 | void **slot; | |
704 | ||
705 | search.mtime = gdata->mtime; | |
c04fe68f AB |
706 | search.size = gdata->size; |
707 | search.inode = gdata->inode; | |
708 | search.device_id = gdata->device_id; | |
6ec53d05 TT |
709 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, |
710 | NO_INSERT); | |
711 | ||
712 | if (slot && *slot) | |
713 | htab_clear_slot (gdb_bfd_cache, slot); | |
714 | } | |
715 | ||
e992eda4 | 716 | bfd_free_data (abfd); |
06d5bbc8 | 717 | delete gdata; |
00f93c44 | 718 | bfd_set_usrdata (abfd, NULL); /* Paranoia. */ |
cbb099e8 | 719 | |
d6b28940 TT |
720 | htab_remove_elt (all_bfds, abfd); |
721 | ||
cbb099e8 | 722 | gdb_bfd_close_or_warn (abfd); |
b82d08cd TT |
723 | |
724 | gdb_bfd_unref (archive_bfd); | |
cbb099e8 | 725 | } |
4bf44c1c TT |
726 | |
727 | /* A helper function that returns the section data descriptor | |
728 | associated with SECTION. If no such descriptor exists, a new one | |
729 | is allocated and cleared. */ | |
730 | ||
731 | static struct gdb_bfd_section_data * | |
732 | get_section_descriptor (asection *section) | |
733 | { | |
734 | struct gdb_bfd_section_data *result; | |
735 | ||
fd361982 | 736 | result = (struct gdb_bfd_section_data *) bfd_section_userdata (section); |
4bf44c1c TT |
737 | |
738 | if (result == NULL) | |
739 | { | |
224c3ddb SM |
740 | result = ((struct gdb_bfd_section_data *) |
741 | bfd_zalloc (section->owner, sizeof (*result))); | |
fd361982 | 742 | bfd_set_section_userdata (section, result); |
4bf44c1c TT |
743 | } |
744 | ||
745 | return result; | |
746 | } | |
747 | ||
4bf44c1c TT |
748 | /* See gdb_bfd.h. */ |
749 | ||
750 | const gdb_byte * | |
751 | gdb_bfd_map_section (asection *sectp, bfd_size_type *size) | |
752 | { | |
753 | bfd *abfd; | |
4bf44c1c | 754 | struct gdb_bfd_section_data *descriptor; |
ea9f10bb | 755 | bfd_byte *data; |
4bf44c1c TT |
756 | |
757 | gdb_assert ((sectp->flags & SEC_RELOC) == 0); | |
758 | gdb_assert (size != NULL); | |
759 | ||
760 | abfd = sectp->owner; | |
761 | ||
762 | descriptor = get_section_descriptor (sectp); | |
763 | ||
764 | /* If the data was already read for this BFD, just reuse it. */ | |
765 | if (descriptor->data != NULL) | |
766 | goto done; | |
767 | ||
ea9f10bb TT |
768 | #ifdef HAVE_MMAP |
769 | if (!bfd_is_section_compressed (abfd, sectp)) | |
4bf44c1c | 770 | { |
ea9f10bb TT |
771 | /* The page size, used when mmapping. */ |
772 | static int pagesize; | |
4bf44c1c | 773 | |
ea9f10bb TT |
774 | if (pagesize == 0) |
775 | pagesize = getpagesize (); | |
776 | ||
777 | /* Only try to mmap sections which are large enough: we don't want | |
778 | to waste space due to fragmentation. */ | |
779 | ||
fd361982 | 780 | if (bfd_section_size (sectp) > 4 * pagesize) |
ea9f10bb | 781 | { |
fd361982 | 782 | descriptor->size = bfd_section_size (sectp); |
ea9f10bb TT |
783 | descriptor->data = bfd_mmap (abfd, 0, descriptor->size, PROT_READ, |
784 | MAP_PRIVATE, sectp->filepos, | |
785 | &descriptor->map_addr, | |
786 | &descriptor->map_len); | |
787 | ||
788 | if ((caddr_t)descriptor->data != MAP_FAILED) | |
789 | { | |
4bf44c1c | 790 | #if HAVE_POSIX_MADVISE |
ea9f10bb TT |
791 | posix_madvise (descriptor->map_addr, descriptor->map_len, |
792 | POSIX_MADV_WILLNEED); | |
4bf44c1c | 793 | #endif |
ea9f10bb TT |
794 | goto done; |
795 | } | |
4bf44c1c | 796 | |
ea9f10bb TT |
797 | /* On failure, clear out the section data and try again. */ |
798 | memset (descriptor, 0, sizeof (*descriptor)); | |
799 | } | |
800 | } | |
4bf44c1c TT |
801 | #endif /* HAVE_MMAP */ |
802 | ||
ea9f10bb TT |
803 | /* Handle compressed sections, or ordinary uncompressed sections in |
804 | the no-mmap case. */ | |
4bf44c1c | 805 | |
fd361982 | 806 | descriptor->size = bfd_section_size (sectp); |
ea9f10bb | 807 | descriptor->data = NULL; |
4bf44c1c | 808 | |
ea9f10bb TT |
809 | data = NULL; |
810 | if (!bfd_get_full_section_contents (abfd, sectp, &data)) | |
41667530 MG |
811 | { |
812 | warning (_("Can't read data for section '%s' in file '%s'"), | |
fd361982 | 813 | bfd_section_name (sectp), |
41667530 MG |
814 | bfd_get_filename (abfd)); |
815 | /* Set size to 0 to prevent further attempts to read the invalid | |
816 | section. */ | |
817 | *size = 0; | |
cafb3438 | 818 | return NULL; |
41667530 | 819 | } |
ea9f10bb | 820 | descriptor->data = data; |
4bf44c1c TT |
821 | |
822 | done: | |
823 | gdb_assert (descriptor->data != NULL); | |
824 | *size = descriptor->size; | |
9a3c8263 | 825 | return (const gdb_byte *) descriptor->data; |
4bf44c1c | 826 | } |
64c31149 | 827 | |
dccee2de TT |
828 | /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and |
829 | return 1. Otherwise print a warning and return 0. ABFD seek position is | |
830 | not preserved. */ | |
831 | ||
832 | static int | |
833 | get_file_crc (bfd *abfd, unsigned long *file_crc_return) | |
834 | { | |
835 | unsigned long file_crc = 0; | |
836 | ||
837 | if (bfd_seek (abfd, 0, SEEK_SET) != 0) | |
838 | { | |
839 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
840 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
841 | return 0; | |
842 | } | |
843 | ||
844 | for (;;) | |
845 | { | |
846 | gdb_byte buffer[8 * 1024]; | |
847 | bfd_size_type count; | |
848 | ||
849 | count = bfd_bread (buffer, sizeof (buffer), abfd); | |
850 | if (count == (bfd_size_type) -1) | |
851 | { | |
852 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
853 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
854 | return 0; | |
855 | } | |
856 | if (count == 0) | |
857 | break; | |
858 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); | |
859 | } | |
860 | ||
861 | *file_crc_return = file_crc; | |
862 | return 1; | |
863 | } | |
864 | ||
865 | /* See gdb_bfd.h. */ | |
866 | ||
867 | int | |
868 | gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out) | |
869 | { | |
9a3c8263 | 870 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
dccee2de TT |
871 | |
872 | if (!gdata->crc_computed) | |
873 | gdata->crc_computed = get_file_crc (abfd, &gdata->crc); | |
874 | ||
875 | if (gdata->crc_computed) | |
876 | *crc_out = gdata->crc; | |
877 | return gdata->crc_computed; | |
878 | } | |
879 | ||
64c31149 TT |
880 | \f |
881 | ||
882 | /* See gdb_bfd.h. */ | |
883 | ||
192b62ce | 884 | gdb_bfd_ref_ptr |
64c31149 TT |
885 | gdb_bfd_fopen (const char *filename, const char *target, const char *mode, |
886 | int fd) | |
887 | { | |
888 | bfd *result = bfd_fopen (filename, target, mode, fd); | |
889 | ||
1831a9f9 | 890 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
891 | } |
892 | ||
893 | /* See gdb_bfd.h. */ | |
894 | ||
192b62ce | 895 | gdb_bfd_ref_ptr |
64c31149 TT |
896 | gdb_bfd_openr (const char *filename, const char *target) |
897 | { | |
898 | bfd *result = bfd_openr (filename, target); | |
899 | ||
1831a9f9 | 900 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
901 | } |
902 | ||
903 | /* See gdb_bfd.h. */ | |
904 | ||
192b62ce | 905 | gdb_bfd_ref_ptr |
64c31149 TT |
906 | gdb_bfd_openw (const char *filename, const char *target) |
907 | { | |
908 | bfd *result = bfd_openw (filename, target); | |
909 | ||
1831a9f9 | 910 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
911 | } |
912 | ||
913 | /* See gdb_bfd.h. */ | |
914 | ||
192b62ce | 915 | gdb_bfd_ref_ptr |
64c31149 TT |
916 | gdb_bfd_openr_iovec (const char *filename, const char *target, |
917 | void *(*open_func) (struct bfd *nbfd, | |
918 | void *open_closure), | |
919 | void *open_closure, | |
920 | file_ptr (*pread_func) (struct bfd *nbfd, | |
921 | void *stream, | |
922 | void *buf, | |
923 | file_ptr nbytes, | |
924 | file_ptr offset), | |
925 | int (*close_func) (struct bfd *nbfd, | |
926 | void *stream), | |
927 | int (*stat_func) (struct bfd *abfd, | |
928 | void *stream, | |
929 | struct stat *sb)) | |
930 | { | |
931 | bfd *result = bfd_openr_iovec (filename, target, | |
932 | open_func, open_closure, | |
933 | pread_func, close_func, stat_func); | |
934 | ||
1831a9f9 | 935 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
936 | } |
937 | ||
938 | /* See gdb_bfd.h. */ | |
939 | ||
0cd61f44 TT |
940 | void |
941 | gdb_bfd_mark_parent (bfd *child, bfd *parent) | |
942 | { | |
943 | struct gdb_bfd_data *gdata; | |
944 | ||
945 | gdb_bfd_ref (child); | |
946 | /* No need to stash the filename here, because we also keep a | |
947 | reference on the parent archive. */ | |
948 | ||
9a3c8263 | 949 | gdata = (struct gdb_bfd_data *) bfd_usrdata (child); |
0cd61f44 TT |
950 | if (gdata->archive_bfd == NULL) |
951 | { | |
952 | gdata->archive_bfd = parent; | |
953 | gdb_bfd_ref (parent); | |
954 | } | |
955 | else | |
956 | gdb_assert (gdata->archive_bfd == parent); | |
957 | } | |
958 | ||
959 | /* See gdb_bfd.h. */ | |
960 | ||
192b62ce | 961 | gdb_bfd_ref_ptr |
64c31149 TT |
962 | gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous) |
963 | { | |
964 | bfd *result = bfd_openr_next_archived_file (archive, previous); | |
965 | ||
966 | if (result) | |
0cd61f44 | 967 | gdb_bfd_mark_parent (result, archive); |
64c31149 | 968 | |
192b62ce | 969 | return gdb_bfd_ref_ptr (result); |
64c31149 TT |
970 | } |
971 | ||
972 | /* See gdb_bfd.h. */ | |
973 | ||
13aaf454 DE |
974 | void |
975 | gdb_bfd_record_inclusion (bfd *includer, bfd *includee) | |
976 | { | |
977 | struct gdb_bfd_data *gdata; | |
978 | ||
9a3c8263 | 979 | gdata = (struct gdb_bfd_data *) bfd_usrdata (includer); |
1831a9f9 | 980 | gdata->included_bfds.push_back (gdb_bfd_ref_ptr::new_reference (includee)); |
13aaf454 DE |
981 | } |
982 | ||
d6b28940 TT |
983 | \f |
984 | ||
65cf3563 TT |
985 | gdb_static_assert (ARRAY_SIZE (_bfd_std_section) == 4); |
986 | ||
987 | /* See gdb_bfd.h. */ | |
988 | ||
989 | int | |
990 | gdb_bfd_section_index (bfd *abfd, asection *section) | |
991 | { | |
992 | if (section == NULL) | |
993 | return -1; | |
994 | else if (section == bfd_com_section_ptr) | |
ce9c0ca1 | 995 | return bfd_count_sections (abfd); |
65cf3563 | 996 | else if (section == bfd_und_section_ptr) |
ce9c0ca1 | 997 | return bfd_count_sections (abfd) + 1; |
65cf3563 | 998 | else if (section == bfd_abs_section_ptr) |
ce9c0ca1 | 999 | return bfd_count_sections (abfd) + 2; |
65cf3563 | 1000 | else if (section == bfd_ind_section_ptr) |
ce9c0ca1 | 1001 | return bfd_count_sections (abfd) + 3; |
65cf3563 TT |
1002 | return section->index; |
1003 | } | |
1004 | ||
1005 | /* See gdb_bfd.h. */ | |
1006 | ||
1007 | int | |
1008 | gdb_bfd_count_sections (bfd *abfd) | |
1009 | { | |
1010 | return bfd_count_sections (abfd) + 4; | |
1011 | } | |
1012 | ||
1da77581 TT |
1013 | /* See gdb_bfd.h. */ |
1014 | ||
1015 | int | |
1016 | gdb_bfd_requires_relocations (bfd *abfd) | |
1017 | { | |
9a3c8263 | 1018 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
1da77581 TT |
1019 | |
1020 | if (gdata->relocation_computed == 0) | |
1021 | { | |
1022 | asection *sect; | |
1023 | ||
1024 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
1025 | if ((sect->flags & SEC_RELOC) != 0) | |
1026 | { | |
1027 | gdata->needs_relocations = 1; | |
1028 | break; | |
1029 | } | |
1030 | ||
1031 | gdata->relocation_computed = 1; | |
1032 | } | |
1033 | ||
1034 | return gdata->needs_relocations; | |
1035 | } | |
1036 | ||
e0fc5c3f SM |
1037 | /* See gdb_bfd.h. */ |
1038 | ||
1039 | bool | |
1040 | gdb_bfd_get_full_section_contents (bfd *abfd, asection *section, | |
1041 | gdb::byte_vector *contents) | |
1042 | { | |
1043 | bfd_size_type section_size = bfd_section_size (section); | |
1044 | ||
1045 | contents->resize (section_size); | |
1046 | ||
1047 | return bfd_get_section_contents (abfd, section, contents->data (), 0, | |
1048 | section_size); | |
1049 | } | |
65cf3563 | 1050 | |
d6b28940 TT |
1051 | /* A callback for htab_traverse that prints a single BFD. */ |
1052 | ||
1053 | static int | |
1054 | print_one_bfd (void **slot, void *data) | |
1055 | { | |
9a3c8263 SM |
1056 | bfd *abfd = (struct bfd *) *slot; |
1057 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
1058 | struct ui_out *uiout = (struct ui_out *) data; | |
d6b28940 | 1059 | |
2e783024 | 1060 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
381befee | 1061 | uiout->field_signed ("refcount", gdata->refc); |
112e8700 SM |
1062 | uiout->field_string ("addr", host_address_to_string (abfd)); |
1063 | uiout->field_string ("filename", bfd_get_filename (abfd)); | |
1064 | uiout->text ("\n"); | |
d6b28940 TT |
1065 | |
1066 | return 1; | |
1067 | } | |
1068 | ||
1069 | /* Implement the 'maint info bfd' command. */ | |
1070 | ||
1071 | static void | |
e4e33335 | 1072 | maintenance_info_bfds (const char *arg, int from_tty) |
d6b28940 | 1073 | { |
d6b28940 TT |
1074 | struct ui_out *uiout = current_uiout; |
1075 | ||
4a2b031d | 1076 | ui_out_emit_table table_emitter (uiout, 3, -1, "bfds"); |
112e8700 SM |
1077 | uiout->table_header (10, ui_left, "refcount", "Refcount"); |
1078 | uiout->table_header (18, ui_left, "addr", "Address"); | |
1079 | uiout->table_header (40, ui_left, "filename", "Filename"); | |
d6b28940 | 1080 | |
112e8700 | 1081 | uiout->table_body (); |
d6b28940 | 1082 | htab_traverse (all_bfds, print_one_bfd, uiout); |
d6b28940 TT |
1083 | } |
1084 | ||
6c265988 | 1085 | void _initialize_gdb_bfd (); |
d6b28940 | 1086 | void |
6c265988 | 1087 | _initialize_gdb_bfd () |
d6b28940 TT |
1088 | { |
1089 | all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
1090 | NULL, xcalloc, xfree); | |
1091 | ||
1092 | add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\ | |
1093 | List the BFDs that are currently open."), | |
1094 | &maintenanceinfolist); | |
18989b3c AB |
1095 | |
1096 | add_setshow_boolean_cmd ("bfd-sharing", no_class, | |
1097 | &bfd_sharing, _("\ | |
1098 | Set whether gdb will share bfds that appear to be the same file."), _("\ | |
1099 | Show whether gdb will share bfds that appear to be the same file."), _("\ | |
1100 | When enabled gdb will reuse existing bfds rather than reopening the\n\ | |
1101 | same file. To decide if two files are the same then gdb compares the\n\ | |
1102 | filename, file size, file modification time, and file inode."), | |
1103 | NULL, | |
1104 | &show_bfd_sharing, | |
1105 | &maintenance_set_cmdlist, | |
1106 | &maintenance_show_cmdlist); | |
566f5e3b AB |
1107 | |
1108 | add_setshow_zuinteger_cmd ("bfd-cache", class_maintenance, | |
1109 | &debug_bfd_cache, _("\ | |
1110 | Set bfd cache debugging."), _("\ | |
1111 | Show bfd cache debugging."), _("\ | |
1112 | When non-zero, bfd cache specific debugging is enabled."), | |
1113 | NULL, | |
1114 | &show_bfd_cache_debug, | |
1115 | &setdebuglist, &showdebuglist); | |
d6b28940 | 1116 | } |