Commit | Line | Data |
---|---|---|
cbb099e8 TT |
1 | /* Definitions for BFD wrappers used by GDB. |
2 | ||
32d0add0 | 3 | Copyright (C) 2011-2015 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" |
614c279d | 25 | #include "filestuff.h" |
13aaf454 | 26 | #include "vec.h" |
4bf44c1c TT |
27 | #ifdef HAVE_MMAP |
28 | #include <sys/mman.h> | |
29 | #ifndef MAP_FAILED | |
30 | #define MAP_FAILED ((void *) -1) | |
31 | #endif | |
32 | #endif | |
f08e97fe GB |
33 | #include "target.h" |
34 | #include "gdb/fileio.h" | |
07c138c8 | 35 | #include "inferior.h" |
4bf44c1c | 36 | |
13aaf454 DE |
37 | typedef bfd *bfdp; |
38 | DEF_VEC_P (bfdp); | |
39 | ||
4bf44c1c TT |
40 | /* An object of this type is stored in the section's user data when |
41 | mapping a section. */ | |
42 | ||
43 | struct gdb_bfd_section_data | |
44 | { | |
45 | /* Size of the data. */ | |
46 | bfd_size_type size; | |
47 | /* If the data was mmapped, this is the length of the map. */ | |
48 | bfd_size_type map_len; | |
49 | /* The data. If NULL, the section data has not been read. */ | |
50 | void *data; | |
51 | /* If the data was mmapped, this is the map address. */ | |
52 | void *map_addr; | |
53 | }; | |
a4453b7e | 54 | |
d6b28940 TT |
55 | /* A hash table holding every BFD that gdb knows about. This is not |
56 | to be confused with 'gdb_bfd_cache', which is used for sharing | |
57 | BFDs; in contrast, this hash is used just to implement | |
58 | "maint info bfd". */ | |
59 | ||
60 | static htab_t all_bfds; | |
61 | ||
6ec53d05 TT |
62 | /* An object of this type is stored in each BFD's user data. */ |
63 | ||
64 | struct gdb_bfd_data | |
65 | { | |
66 | /* The reference count. */ | |
67 | int refc; | |
68 | ||
69 | /* The mtime of the BFD at the point the cache entry was made. */ | |
70 | time_t mtime; | |
b82d08cd | 71 | |
c04fe68f AB |
72 | /* The file size (in bytes) at the point the cache entry was made. */ |
73 | off_t size; | |
74 | ||
75 | /* The inode of the file at the point the cache entry was made. */ | |
76 | ino_t inode; | |
77 | ||
78 | /* The device id of the file at the point the cache entry was made. */ | |
79 | dev_t device_id; | |
80 | ||
1da77581 TT |
81 | /* This is true if we have determined whether this BFD has any |
82 | sections requiring relocation. */ | |
83 | unsigned int relocation_computed : 1; | |
84 | ||
85 | /* This is true if any section needs relocation. */ | |
86 | unsigned int needs_relocations : 1; | |
87 | ||
dccee2de TT |
88 | /* This is true if we have successfully computed the file's CRC. */ |
89 | unsigned int crc_computed : 1; | |
90 | ||
91 | /* The file's CRC. */ | |
92 | unsigned long crc; | |
93 | ||
b82d08cd TT |
94 | /* If the BFD comes from an archive, this points to the archive's |
95 | BFD. Otherwise, this is NULL. */ | |
96 | bfd *archive_bfd; | |
e992eda4 | 97 | |
13aaf454 DE |
98 | /* Table of all the bfds this bfd has included. */ |
99 | VEC (bfdp) *included_bfds; | |
100 | ||
e992eda4 TT |
101 | /* The registry. */ |
102 | REGISTRY_FIELDS; | |
6ec53d05 TT |
103 | }; |
104 | ||
e992eda4 TT |
105 | #define GDB_BFD_DATA_ACCESSOR(ABFD) \ |
106 | ((struct gdb_bfd_data *) bfd_usrdata (ABFD)) | |
107 | ||
108 | DEFINE_REGISTRY (bfd, GDB_BFD_DATA_ACCESSOR) | |
109 | ||
6ec53d05 TT |
110 | /* A hash table storing all the BFDs maintained in the cache. */ |
111 | ||
112 | static htab_t gdb_bfd_cache; | |
113 | ||
18989b3c AB |
114 | /* When true gdb will reuse an existing bfd object if the filename, |
115 | modification time, and file size all match. */ | |
116 | ||
117 | static int bfd_sharing = 1; | |
118 | static void | |
119 | show_bfd_sharing (struct ui_file *file, int from_tty, | |
120 | struct cmd_list_element *c, const char *value) | |
121 | { | |
122 | fprintf_filtered (file, _("BFD sharing is %s.\n"), value); | |
123 | } | |
124 | ||
566f5e3b AB |
125 | /* When non-zero debugging of the bfd caches is enabled. */ |
126 | ||
127 | static unsigned int debug_bfd_cache; | |
128 | static void | |
129 | show_bfd_cache_debug (struct ui_file *file, int from_tty, | |
130 | struct cmd_list_element *c, const char *value) | |
131 | { | |
132 | fprintf_filtered (file, _("BFD cache debugging is %s.\n"), value); | |
133 | } | |
134 | ||
6ec53d05 TT |
135 | /* The type of an object being looked up in gdb_bfd_cache. We use |
136 | htab's capability of storing one kind of object (BFD in this case) | |
137 | and using a different sort of object for searching. */ | |
138 | ||
139 | struct gdb_bfd_cache_search | |
140 | { | |
141 | /* The filename. */ | |
142 | const char *filename; | |
143 | /* The mtime. */ | |
144 | time_t mtime; | |
c04fe68f AB |
145 | /* The file size (in bytes). */ |
146 | off_t size; | |
147 | /* The inode of the file. */ | |
148 | ino_t inode; | |
149 | /* The device id of the file. */ | |
150 | dev_t device_id; | |
6ec53d05 TT |
151 | }; |
152 | ||
153 | /* A hash function for BFDs. */ | |
154 | ||
155 | static hashval_t | |
156 | hash_bfd (const void *b) | |
157 | { | |
158 | const bfd *abfd = b; | |
159 | ||
160 | /* It is simplest to just hash the filename. */ | |
161 | return htab_hash_string (bfd_get_filename (abfd)); | |
162 | } | |
163 | ||
164 | /* An equality function for BFDs. Note that this expects the caller | |
165 | to search using struct gdb_bfd_cache_search only, not BFDs. */ | |
166 | ||
167 | static int | |
168 | eq_bfd (const void *a, const void *b) | |
169 | { | |
170 | const bfd *abfd = a; | |
171 | const struct gdb_bfd_cache_search *s = b; | |
172 | struct gdb_bfd_data *gdata = bfd_usrdata (abfd); | |
173 | ||
174 | return (gdata->mtime == s->mtime | |
c04fe68f AB |
175 | && gdata->size == s->size |
176 | && gdata->inode == s->inode | |
177 | && gdata->device_id == s->device_id | |
6ec53d05 TT |
178 | && strcmp (bfd_get_filename (abfd), s->filename) == 0); |
179 | } | |
180 | ||
181 | /* See gdb_bfd.h. */ | |
182 | ||
f08e97fe GB |
183 | int |
184 | is_target_filename (const char *name) | |
185 | { | |
186 | return startswith (name, TARGET_SYSROOT_PREFIX); | |
187 | } | |
188 | ||
189 | /* See gdb_bfd.h. */ | |
190 | ||
191 | int | |
192 | gdb_bfd_has_target_filename (struct bfd *abfd) | |
193 | { | |
194 | return is_target_filename (bfd_get_filename (abfd)); | |
195 | } | |
196 | ||
197 | ||
198 | /* Return the system error number corresponding to ERRNUM. */ | |
199 | ||
200 | static int | |
201 | fileio_errno_to_host (int errnum) | |
202 | { | |
203 | switch (errnum) | |
204 | { | |
205 | case FILEIO_EPERM: | |
206 | return EPERM; | |
207 | case FILEIO_ENOENT: | |
208 | return ENOENT; | |
209 | case FILEIO_EINTR: | |
210 | return EINTR; | |
211 | case FILEIO_EIO: | |
212 | return EIO; | |
213 | case FILEIO_EBADF: | |
214 | return EBADF; | |
215 | case FILEIO_EACCES: | |
216 | return EACCES; | |
217 | case FILEIO_EFAULT: | |
218 | return EFAULT; | |
219 | case FILEIO_EBUSY: | |
220 | return EBUSY; | |
221 | case FILEIO_EEXIST: | |
222 | return EEXIST; | |
223 | case FILEIO_ENODEV: | |
224 | return ENODEV; | |
225 | case FILEIO_ENOTDIR: | |
226 | return ENOTDIR; | |
227 | case FILEIO_EISDIR: | |
228 | return EISDIR; | |
229 | case FILEIO_EINVAL: | |
230 | return EINVAL; | |
231 | case FILEIO_ENFILE: | |
232 | return ENFILE; | |
233 | case FILEIO_EMFILE: | |
234 | return EMFILE; | |
235 | case FILEIO_EFBIG: | |
236 | return EFBIG; | |
237 | case FILEIO_ENOSPC: | |
238 | return ENOSPC; | |
239 | case FILEIO_ESPIPE: | |
240 | return ESPIPE; | |
241 | case FILEIO_EROFS: | |
242 | return EROFS; | |
243 | case FILEIO_ENOSYS: | |
244 | return ENOSYS; | |
245 | case FILEIO_ENAMETOOLONG: | |
246 | return ENAMETOOLONG; | |
247 | } | |
248 | return -1; | |
249 | } | |
250 | ||
251 | /* Wrapper for target_fileio_open suitable for passing as the | |
252 | OPEN_FUNC argument to gdb_bfd_openr_iovec. The supplied | |
253 | OPEN_CLOSURE is unused. */ | |
254 | ||
255 | static void * | |
07c138c8 | 256 | gdb_bfd_iovec_fileio_open (struct bfd *abfd, void *inferior) |
f08e97fe GB |
257 | { |
258 | const char *filename = bfd_get_filename (abfd); | |
259 | int fd, target_errno; | |
260 | int *stream; | |
261 | ||
262 | gdb_assert (is_target_filename (filename)); | |
263 | ||
4313b8c0 GB |
264 | fd = target_fileio_open_warn_if_slow ((struct inferior *) inferior, |
265 | filename | |
266 | + strlen (TARGET_SYSROOT_PREFIX), | |
267 | FILEIO_O_RDONLY, 0, | |
268 | &target_errno); | |
f08e97fe GB |
269 | if (fd == -1) |
270 | { | |
271 | errno = fileio_errno_to_host (target_errno); | |
272 | bfd_set_error (bfd_error_system_call); | |
273 | return NULL; | |
274 | } | |
275 | ||
276 | stream = XCNEW (int); | |
277 | *stream = fd; | |
278 | return stream; | |
279 | } | |
280 | ||
281 | /* Wrapper for target_fileio_pread suitable for passing as the | |
282 | PREAD_FUNC argument to gdb_bfd_openr_iovec. */ | |
283 | ||
284 | static file_ptr | |
285 | gdb_bfd_iovec_fileio_pread (struct bfd *abfd, void *stream, void *buf, | |
286 | file_ptr nbytes, file_ptr offset) | |
287 | { | |
288 | int fd = *(int *) stream; | |
289 | int target_errno; | |
290 | file_ptr pos, bytes; | |
291 | ||
292 | pos = 0; | |
293 | while (nbytes > pos) | |
294 | { | |
2d7711a3 GB |
295 | QUIT; |
296 | ||
f08e97fe GB |
297 | bytes = target_fileio_pread (fd, (gdb_byte *) buf + pos, |
298 | nbytes - pos, offset + pos, | |
299 | &target_errno); | |
300 | if (bytes == 0) | |
301 | /* Success, but no bytes, means end-of-file. */ | |
302 | break; | |
303 | if (bytes == -1) | |
304 | { | |
305 | errno = fileio_errno_to_host (target_errno); | |
306 | bfd_set_error (bfd_error_system_call); | |
307 | return -1; | |
308 | } | |
309 | ||
310 | pos += bytes; | |
311 | } | |
312 | ||
313 | return pos; | |
314 | } | |
315 | ||
316 | /* Wrapper for target_fileio_close suitable for passing as the | |
317 | CLOSE_FUNC argument to gdb_bfd_openr_iovec. */ | |
318 | ||
319 | static int | |
320 | gdb_bfd_iovec_fileio_close (struct bfd *abfd, void *stream) | |
321 | { | |
322 | int fd = *(int *) stream; | |
323 | int target_errno; | |
324 | ||
325 | xfree (stream); | |
326 | ||
327 | /* Ignore errors on close. These may happen with remote | |
328 | targets if the connection has already been torn down. */ | |
329 | target_fileio_close (fd, &target_errno); | |
330 | ||
331 | /* Zero means success. */ | |
332 | return 0; | |
333 | } | |
334 | ||
335 | /* Wrapper for target_fileio_fstat suitable for passing as the | |
336 | STAT_FUNC argument to gdb_bfd_openr_iovec. */ | |
337 | ||
338 | static int | |
339 | gdb_bfd_iovec_fileio_fstat (struct bfd *abfd, void *stream, | |
340 | struct stat *sb) | |
341 | { | |
342 | int fd = *(int *) stream; | |
343 | int target_errno; | |
344 | int result; | |
345 | ||
346 | result = target_fileio_fstat (fd, sb, &target_errno); | |
347 | if (result == -1) | |
348 | { | |
349 | errno = fileio_errno_to_host (target_errno); | |
350 | bfd_set_error (bfd_error_system_call); | |
351 | } | |
352 | ||
353 | return result; | |
354 | } | |
355 | ||
356 | /* See gdb_bfd.h. */ | |
357 | ||
6ec53d05 TT |
358 | struct bfd * |
359 | gdb_bfd_open (const char *name, const char *target, int fd) | |
360 | { | |
361 | hashval_t hash; | |
362 | void **slot; | |
363 | bfd *abfd; | |
364 | struct gdb_bfd_cache_search search; | |
365 | struct stat st; | |
366 | ||
f08e97fe GB |
367 | if (is_target_filename (name)) |
368 | { | |
369 | if (!target_filesystem_is_local ()) | |
370 | { | |
371 | gdb_assert (fd == -1); | |
372 | ||
e3dd7556 | 373 | return gdb_bfd_openr_iovec (name, target, |
07c138c8 GB |
374 | gdb_bfd_iovec_fileio_open, |
375 | current_inferior (), | |
f08e97fe GB |
376 | gdb_bfd_iovec_fileio_pread, |
377 | gdb_bfd_iovec_fileio_close, | |
378 | gdb_bfd_iovec_fileio_fstat); | |
f08e97fe GB |
379 | } |
380 | ||
381 | name += strlen (TARGET_SYSROOT_PREFIX); | |
382 | } | |
383 | ||
6ec53d05 TT |
384 | if (gdb_bfd_cache == NULL) |
385 | gdb_bfd_cache = htab_create_alloc (1, hash_bfd, eq_bfd, NULL, | |
386 | xcalloc, xfree); | |
387 | ||
388 | if (fd == -1) | |
389 | { | |
614c279d | 390 | fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0); |
6ec53d05 TT |
391 | if (fd == -1) |
392 | { | |
393 | bfd_set_error (bfd_error_system_call); | |
394 | return NULL; | |
395 | } | |
396 | } | |
397 | ||
398 | search.filename = name; | |
399 | if (fstat (fd, &st) < 0) | |
400 | { | |
401 | /* Weird situation here. */ | |
402 | search.mtime = 0; | |
c04fe68f AB |
403 | search.size = 0; |
404 | search.inode = 0; | |
405 | search.device_id = 0; | |
6ec53d05 TT |
406 | } |
407 | else | |
c04fe68f AB |
408 | { |
409 | search.mtime = st.st_mtime; | |
410 | search.size = st.st_size; | |
411 | search.inode = st.st_ino; | |
412 | search.device_id = st.st_dev; | |
413 | } | |
6ec53d05 TT |
414 | |
415 | /* Note that this must compute the same result as hash_bfd. */ | |
416 | hash = htab_hash_string (name); | |
417 | /* Note that we cannot use htab_find_slot_with_hash here, because | |
418 | opening the BFD may fail; and this would violate hashtab | |
419 | invariants. */ | |
420 | abfd = htab_find_with_hash (gdb_bfd_cache, &search, hash); | |
18989b3c | 421 | if (bfd_sharing && abfd != NULL) |
6ec53d05 | 422 | { |
566f5e3b AB |
423 | if (debug_bfd_cache) |
424 | fprintf_unfiltered (gdb_stdlog, | |
425 | "Reusing cached bfd %s for %s\n", | |
426 | host_address_to_string (abfd), | |
427 | bfd_get_filename (abfd)); | |
6ec53d05 | 428 | close (fd); |
520b0001 TT |
429 | gdb_bfd_ref (abfd); |
430 | return abfd; | |
6ec53d05 TT |
431 | } |
432 | ||
433 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); | |
434 | if (abfd == NULL) | |
435 | return NULL; | |
436 | ||
566f5e3b AB |
437 | if (debug_bfd_cache) |
438 | fprintf_unfiltered (gdb_stdlog, | |
439 | "Creating new bfd %s for %s\n", | |
440 | host_address_to_string (abfd), | |
441 | bfd_get_filename (abfd)); | |
442 | ||
18989b3c AB |
443 | if (bfd_sharing) |
444 | { | |
445 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, INSERT); | |
446 | gdb_assert (!*slot); | |
447 | *slot = abfd; | |
448 | } | |
6ec53d05 | 449 | |
520b0001 TT |
450 | gdb_bfd_ref (abfd); |
451 | return abfd; | |
6ec53d05 TT |
452 | } |
453 | ||
4bf44c1c TT |
454 | /* A helper function that releases any section data attached to the |
455 | BFD. */ | |
456 | ||
457 | static void | |
458 | free_one_bfd_section (bfd *abfd, asection *sectp, void *ignore) | |
459 | { | |
460 | struct gdb_bfd_section_data *sect = bfd_get_section_userdata (abfd, sectp); | |
461 | ||
462 | if (sect != NULL && sect->data != NULL) | |
463 | { | |
464 | #ifdef HAVE_MMAP | |
465 | if (sect->map_addr != NULL) | |
466 | { | |
467 | int res; | |
468 | ||
469 | res = munmap (sect->map_addr, sect->map_len); | |
470 | gdb_assert (res == 0); | |
471 | } | |
472 | else | |
473 | #endif | |
474 | xfree (sect->data); | |
475 | } | |
476 | } | |
477 | ||
cbb099e8 TT |
478 | /* Close ABFD, and warn if that fails. */ |
479 | ||
480 | static int | |
481 | gdb_bfd_close_or_warn (struct bfd *abfd) | |
482 | { | |
483 | int ret; | |
484 | char *name = bfd_get_filename (abfd); | |
485 | ||
4bf44c1c TT |
486 | bfd_map_over_sections (abfd, free_one_bfd_section, NULL); |
487 | ||
cbb099e8 TT |
488 | ret = bfd_close (abfd); |
489 | ||
490 | if (!ret) | |
491 | warning (_("cannot close \"%s\": %s"), | |
492 | name, bfd_errmsg (bfd_get_error ())); | |
493 | ||
494 | return ret; | |
495 | } | |
496 | ||
596f7d67 | 497 | /* See gdb_bfd.h. */ |
cbb099e8 | 498 | |
520b0001 | 499 | void |
cbb099e8 TT |
500 | gdb_bfd_ref (struct bfd *abfd) |
501 | { | |
c04fe68f | 502 | struct stat buf; |
6ec53d05 | 503 | struct gdb_bfd_data *gdata; |
d6b28940 | 504 | void **slot; |
cbb099e8 TT |
505 | |
506 | if (abfd == NULL) | |
520b0001 | 507 | return; |
cbb099e8 | 508 | |
6ec53d05 | 509 | gdata = bfd_usrdata (abfd); |
cbb099e8 | 510 | |
566f5e3b AB |
511 | if (debug_bfd_cache) |
512 | fprintf_unfiltered (gdb_stdlog, | |
513 | "Increase reference count on bfd %s (%s)\n", | |
514 | host_address_to_string (abfd), | |
515 | bfd_get_filename (abfd)); | |
516 | ||
6ec53d05 | 517 | if (gdata != NULL) |
cbb099e8 | 518 | { |
6ec53d05 | 519 | gdata->refc += 1; |
520b0001 | 520 | return; |
cbb099e8 TT |
521 | } |
522 | ||
ea9f10bb TT |
523 | /* Ask BFD to decompress sections in bfd_get_full_section_contents. */ |
524 | abfd->flags |= BFD_DECOMPRESS; | |
525 | ||
224c3ddb SM |
526 | gdata |
527 | = (struct gdb_bfd_data *) bfd_zalloc (abfd, sizeof (struct gdb_bfd_data)); | |
6ec53d05 TT |
528 | gdata->refc = 1; |
529 | gdata->mtime = bfd_get_mtime (abfd); | |
c04fe68f | 530 | gdata->size = bfd_get_size (abfd); |
b82d08cd | 531 | gdata->archive_bfd = NULL; |
c04fe68f AB |
532 | if (bfd_stat (abfd, &buf) == 0) |
533 | { | |
534 | gdata->inode = buf.st_ino; | |
535 | gdata->device_id = buf.st_dev; | |
536 | } | |
537 | else | |
538 | { | |
539 | /* The stat failed. */ | |
540 | gdata->inode = 0; | |
541 | gdata->device_id = 0; | |
542 | } | |
6ec53d05 | 543 | bfd_usrdata (abfd) = gdata; |
d6b28940 | 544 | |
e992eda4 TT |
545 | bfd_alloc_data (abfd); |
546 | ||
d6b28940 TT |
547 | /* This is the first we've seen it, so add it to the hash table. */ |
548 | slot = htab_find_slot (all_bfds, abfd, INSERT); | |
549 | gdb_assert (slot && !*slot); | |
550 | *slot = abfd; | |
cbb099e8 TT |
551 | } |
552 | ||
596f7d67 | 553 | /* See gdb_bfd.h. */ |
cbb099e8 TT |
554 | |
555 | void | |
556 | gdb_bfd_unref (struct bfd *abfd) | |
557 | { | |
13aaf454 | 558 | int ix; |
6ec53d05 TT |
559 | struct gdb_bfd_data *gdata; |
560 | struct gdb_bfd_cache_search search; | |
13aaf454 | 561 | bfd *archive_bfd, *included_bfd; |
cbb099e8 TT |
562 | |
563 | if (abfd == NULL) | |
564 | return; | |
565 | ||
6ec53d05 TT |
566 | gdata = bfd_usrdata (abfd); |
567 | gdb_assert (gdata->refc >= 1); | |
cbb099e8 | 568 | |
6ec53d05 TT |
569 | gdata->refc -= 1; |
570 | if (gdata->refc > 0) | |
566f5e3b AB |
571 | { |
572 | if (debug_bfd_cache) | |
573 | fprintf_unfiltered (gdb_stdlog, | |
574 | "Decrease reference count on bfd %s (%s)\n", | |
575 | host_address_to_string (abfd), | |
576 | bfd_get_filename (abfd)); | |
577 | return; | |
578 | } | |
579 | ||
580 | if (debug_bfd_cache) | |
581 | fprintf_unfiltered (gdb_stdlog, | |
582 | "Delete final reference count on bfd %s (%s)\n", | |
583 | host_address_to_string (abfd), | |
584 | bfd_get_filename (abfd)); | |
cbb099e8 | 585 | |
b82d08cd | 586 | archive_bfd = gdata->archive_bfd; |
6ec53d05 TT |
587 | search.filename = bfd_get_filename (abfd); |
588 | ||
589 | if (gdb_bfd_cache && search.filename) | |
590 | { | |
591 | hashval_t hash = htab_hash_string (search.filename); | |
592 | void **slot; | |
593 | ||
594 | search.mtime = gdata->mtime; | |
c04fe68f AB |
595 | search.size = gdata->size; |
596 | search.inode = gdata->inode; | |
597 | search.device_id = gdata->device_id; | |
6ec53d05 TT |
598 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, |
599 | NO_INSERT); | |
600 | ||
601 | if (slot && *slot) | |
602 | htab_clear_slot (gdb_bfd_cache, slot); | |
603 | } | |
604 | ||
13aaf454 DE |
605 | for (ix = 0; |
606 | VEC_iterate (bfdp, gdata->included_bfds, ix, included_bfd); | |
607 | ++ix) | |
608 | gdb_bfd_unref (included_bfd); | |
609 | VEC_free (bfdp, gdata->included_bfds); | |
610 | ||
e992eda4 | 611 | bfd_free_data (abfd); |
cbb099e8 TT |
612 | bfd_usrdata (abfd) = NULL; /* Paranoia. */ |
613 | ||
d6b28940 TT |
614 | htab_remove_elt (all_bfds, abfd); |
615 | ||
cbb099e8 | 616 | gdb_bfd_close_or_warn (abfd); |
b82d08cd TT |
617 | |
618 | gdb_bfd_unref (archive_bfd); | |
cbb099e8 | 619 | } |
4bf44c1c TT |
620 | |
621 | /* A helper function that returns the section data descriptor | |
622 | associated with SECTION. If no such descriptor exists, a new one | |
623 | is allocated and cleared. */ | |
624 | ||
625 | static struct gdb_bfd_section_data * | |
626 | get_section_descriptor (asection *section) | |
627 | { | |
628 | struct gdb_bfd_section_data *result; | |
629 | ||
630 | result = bfd_get_section_userdata (section->owner, section); | |
631 | ||
632 | if (result == NULL) | |
633 | { | |
224c3ddb SM |
634 | result = ((struct gdb_bfd_section_data *) |
635 | bfd_zalloc (section->owner, sizeof (*result))); | |
4bf44c1c TT |
636 | bfd_set_section_userdata (section->owner, section, result); |
637 | } | |
638 | ||
639 | return result; | |
640 | } | |
641 | ||
4bf44c1c TT |
642 | /* See gdb_bfd.h. */ |
643 | ||
644 | const gdb_byte * | |
645 | gdb_bfd_map_section (asection *sectp, bfd_size_type *size) | |
646 | { | |
647 | bfd *abfd; | |
4bf44c1c | 648 | struct gdb_bfd_section_data *descriptor; |
ea9f10bb | 649 | bfd_byte *data; |
4bf44c1c TT |
650 | |
651 | gdb_assert ((sectp->flags & SEC_RELOC) == 0); | |
652 | gdb_assert (size != NULL); | |
653 | ||
654 | abfd = sectp->owner; | |
655 | ||
656 | descriptor = get_section_descriptor (sectp); | |
657 | ||
658 | /* If the data was already read for this BFD, just reuse it. */ | |
659 | if (descriptor->data != NULL) | |
660 | goto done; | |
661 | ||
ea9f10bb TT |
662 | #ifdef HAVE_MMAP |
663 | if (!bfd_is_section_compressed (abfd, sectp)) | |
4bf44c1c | 664 | { |
ea9f10bb TT |
665 | /* The page size, used when mmapping. */ |
666 | static int pagesize; | |
4bf44c1c | 667 | |
ea9f10bb TT |
668 | if (pagesize == 0) |
669 | pagesize = getpagesize (); | |
670 | ||
671 | /* Only try to mmap sections which are large enough: we don't want | |
672 | to waste space due to fragmentation. */ | |
673 | ||
674 | if (bfd_get_section_size (sectp) > 4 * pagesize) | |
675 | { | |
676 | descriptor->size = bfd_get_section_size (sectp); | |
677 | descriptor->data = bfd_mmap (abfd, 0, descriptor->size, PROT_READ, | |
678 | MAP_PRIVATE, sectp->filepos, | |
679 | &descriptor->map_addr, | |
680 | &descriptor->map_len); | |
681 | ||
682 | if ((caddr_t)descriptor->data != MAP_FAILED) | |
683 | { | |
4bf44c1c | 684 | #if HAVE_POSIX_MADVISE |
ea9f10bb TT |
685 | posix_madvise (descriptor->map_addr, descriptor->map_len, |
686 | POSIX_MADV_WILLNEED); | |
4bf44c1c | 687 | #endif |
ea9f10bb TT |
688 | goto done; |
689 | } | |
4bf44c1c | 690 | |
ea9f10bb TT |
691 | /* On failure, clear out the section data and try again. */ |
692 | memset (descriptor, 0, sizeof (*descriptor)); | |
693 | } | |
694 | } | |
4bf44c1c TT |
695 | #endif /* HAVE_MMAP */ |
696 | ||
ea9f10bb TT |
697 | /* Handle compressed sections, or ordinary uncompressed sections in |
698 | the no-mmap case. */ | |
4bf44c1c TT |
699 | |
700 | descriptor->size = bfd_get_section_size (sectp); | |
ea9f10bb | 701 | descriptor->data = NULL; |
4bf44c1c | 702 | |
ea9f10bb TT |
703 | data = NULL; |
704 | if (!bfd_get_full_section_contents (abfd, sectp, &data)) | |
705 | error (_("Can't read data for section '%s' in file '%s'"), | |
706 | bfd_get_section_name (abfd, sectp), | |
707 | bfd_get_filename (abfd)); | |
708 | descriptor->data = data; | |
4bf44c1c TT |
709 | |
710 | done: | |
711 | gdb_assert (descriptor->data != NULL); | |
712 | *size = descriptor->size; | |
713 | return descriptor->data; | |
714 | } | |
64c31149 | 715 | |
dccee2de TT |
716 | /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and |
717 | return 1. Otherwise print a warning and return 0. ABFD seek position is | |
718 | not preserved. */ | |
719 | ||
720 | static int | |
721 | get_file_crc (bfd *abfd, unsigned long *file_crc_return) | |
722 | { | |
723 | unsigned long file_crc = 0; | |
724 | ||
725 | if (bfd_seek (abfd, 0, SEEK_SET) != 0) | |
726 | { | |
727 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
728 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
729 | return 0; | |
730 | } | |
731 | ||
732 | for (;;) | |
733 | { | |
734 | gdb_byte buffer[8 * 1024]; | |
735 | bfd_size_type count; | |
736 | ||
737 | count = bfd_bread (buffer, sizeof (buffer), abfd); | |
738 | if (count == (bfd_size_type) -1) | |
739 | { | |
740 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
741 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
742 | return 0; | |
743 | } | |
744 | if (count == 0) | |
745 | break; | |
746 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); | |
747 | } | |
748 | ||
749 | *file_crc_return = file_crc; | |
750 | return 1; | |
751 | } | |
752 | ||
753 | /* See gdb_bfd.h. */ | |
754 | ||
755 | int | |
756 | gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out) | |
757 | { | |
758 | struct gdb_bfd_data *gdata = bfd_usrdata (abfd); | |
759 | ||
760 | if (!gdata->crc_computed) | |
761 | gdata->crc_computed = get_file_crc (abfd, &gdata->crc); | |
762 | ||
763 | if (gdata->crc_computed) | |
764 | *crc_out = gdata->crc; | |
765 | return gdata->crc_computed; | |
766 | } | |
767 | ||
64c31149 TT |
768 | \f |
769 | ||
770 | /* See gdb_bfd.h. */ | |
771 | ||
772 | bfd * | |
773 | gdb_bfd_fopen (const char *filename, const char *target, const char *mode, | |
774 | int fd) | |
775 | { | |
776 | bfd *result = bfd_fopen (filename, target, mode, fd); | |
777 | ||
778 | if (result) | |
adcf2eed | 779 | gdb_bfd_ref (result); |
64c31149 TT |
780 | |
781 | return result; | |
782 | } | |
783 | ||
784 | /* See gdb_bfd.h. */ | |
785 | ||
786 | bfd * | |
787 | gdb_bfd_openr (const char *filename, const char *target) | |
788 | { | |
789 | bfd *result = bfd_openr (filename, target); | |
790 | ||
791 | if (result) | |
adcf2eed | 792 | gdb_bfd_ref (result); |
64c31149 TT |
793 | |
794 | return result; | |
795 | } | |
796 | ||
797 | /* See gdb_bfd.h. */ | |
798 | ||
799 | bfd * | |
800 | gdb_bfd_openw (const char *filename, const char *target) | |
801 | { | |
802 | bfd *result = bfd_openw (filename, target); | |
803 | ||
804 | if (result) | |
adcf2eed | 805 | gdb_bfd_ref (result); |
64c31149 TT |
806 | |
807 | return result; | |
808 | } | |
809 | ||
810 | /* See gdb_bfd.h. */ | |
811 | ||
812 | bfd * | |
813 | gdb_bfd_openr_iovec (const char *filename, const char *target, | |
814 | void *(*open_func) (struct bfd *nbfd, | |
815 | void *open_closure), | |
816 | void *open_closure, | |
817 | file_ptr (*pread_func) (struct bfd *nbfd, | |
818 | void *stream, | |
819 | void *buf, | |
820 | file_ptr nbytes, | |
821 | file_ptr offset), | |
822 | int (*close_func) (struct bfd *nbfd, | |
823 | void *stream), | |
824 | int (*stat_func) (struct bfd *abfd, | |
825 | void *stream, | |
826 | struct stat *sb)) | |
827 | { | |
828 | bfd *result = bfd_openr_iovec (filename, target, | |
829 | open_func, open_closure, | |
830 | pread_func, close_func, stat_func); | |
831 | ||
832 | if (result) | |
adcf2eed | 833 | gdb_bfd_ref (result); |
64c31149 TT |
834 | |
835 | return result; | |
836 | } | |
837 | ||
838 | /* See gdb_bfd.h. */ | |
839 | ||
0cd61f44 TT |
840 | void |
841 | gdb_bfd_mark_parent (bfd *child, bfd *parent) | |
842 | { | |
843 | struct gdb_bfd_data *gdata; | |
844 | ||
845 | gdb_bfd_ref (child); | |
846 | /* No need to stash the filename here, because we also keep a | |
847 | reference on the parent archive. */ | |
848 | ||
849 | gdata = bfd_usrdata (child); | |
850 | if (gdata->archive_bfd == NULL) | |
851 | { | |
852 | gdata->archive_bfd = parent; | |
853 | gdb_bfd_ref (parent); | |
854 | } | |
855 | else | |
856 | gdb_assert (gdata->archive_bfd == parent); | |
857 | } | |
858 | ||
859 | /* See gdb_bfd.h. */ | |
860 | ||
64c31149 TT |
861 | bfd * |
862 | gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous) | |
863 | { | |
864 | bfd *result = bfd_openr_next_archived_file (archive, previous); | |
865 | ||
866 | if (result) | |
0cd61f44 | 867 | gdb_bfd_mark_parent (result, archive); |
64c31149 TT |
868 | |
869 | return result; | |
870 | } | |
871 | ||
872 | /* See gdb_bfd.h. */ | |
873 | ||
13aaf454 DE |
874 | void |
875 | gdb_bfd_record_inclusion (bfd *includer, bfd *includee) | |
876 | { | |
877 | struct gdb_bfd_data *gdata; | |
878 | ||
879 | gdb_bfd_ref (includee); | |
880 | gdata = bfd_usrdata (includer); | |
881 | VEC_safe_push (bfdp, gdata->included_bfds, includee); | |
882 | } | |
883 | ||
884 | /* See gdb_bfd.h. */ | |
885 | ||
64c31149 TT |
886 | bfd * |
887 | gdb_bfd_fdopenr (const char *filename, const char *target, int fd) | |
888 | { | |
889 | bfd *result = bfd_fdopenr (filename, target, fd); | |
890 | ||
891 | if (result) | |
adcf2eed | 892 | gdb_bfd_ref (result); |
64c31149 TT |
893 | |
894 | return result; | |
895 | } | |
d6b28940 TT |
896 | |
897 | \f | |
898 | ||
65cf3563 TT |
899 | gdb_static_assert (ARRAY_SIZE (_bfd_std_section) == 4); |
900 | ||
901 | /* See gdb_bfd.h. */ | |
902 | ||
903 | int | |
904 | gdb_bfd_section_index (bfd *abfd, asection *section) | |
905 | { | |
906 | if (section == NULL) | |
907 | return -1; | |
908 | else if (section == bfd_com_section_ptr) | |
ce9c0ca1 | 909 | return bfd_count_sections (abfd); |
65cf3563 | 910 | else if (section == bfd_und_section_ptr) |
ce9c0ca1 | 911 | return bfd_count_sections (abfd) + 1; |
65cf3563 | 912 | else if (section == bfd_abs_section_ptr) |
ce9c0ca1 | 913 | return bfd_count_sections (abfd) + 2; |
65cf3563 | 914 | else if (section == bfd_ind_section_ptr) |
ce9c0ca1 | 915 | return bfd_count_sections (abfd) + 3; |
65cf3563 TT |
916 | return section->index; |
917 | } | |
918 | ||
919 | /* See gdb_bfd.h. */ | |
920 | ||
921 | int | |
922 | gdb_bfd_count_sections (bfd *abfd) | |
923 | { | |
924 | return bfd_count_sections (abfd) + 4; | |
925 | } | |
926 | ||
1da77581 TT |
927 | /* See gdb_bfd.h. */ |
928 | ||
929 | int | |
930 | gdb_bfd_requires_relocations (bfd *abfd) | |
931 | { | |
932 | struct gdb_bfd_data *gdata = bfd_usrdata (abfd); | |
933 | ||
934 | if (gdata->relocation_computed == 0) | |
935 | { | |
936 | asection *sect; | |
937 | ||
938 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
939 | if ((sect->flags & SEC_RELOC) != 0) | |
940 | { | |
941 | gdata->needs_relocations = 1; | |
942 | break; | |
943 | } | |
944 | ||
945 | gdata->relocation_computed = 1; | |
946 | } | |
947 | ||
948 | return gdata->needs_relocations; | |
949 | } | |
950 | ||
65cf3563 TT |
951 | \f |
952 | ||
d6b28940 TT |
953 | /* A callback for htab_traverse that prints a single BFD. */ |
954 | ||
955 | static int | |
956 | print_one_bfd (void **slot, void *data) | |
957 | { | |
958 | bfd *abfd = *slot; | |
959 | struct gdb_bfd_data *gdata = bfd_usrdata (abfd); | |
960 | struct ui_out *uiout = data; | |
961 | struct cleanup *inner; | |
962 | ||
963 | inner = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); | |
964 | ui_out_field_int (uiout, "refcount", gdata->refc); | |
965 | ui_out_field_string (uiout, "addr", host_address_to_string (abfd)); | |
966 | ui_out_field_string (uiout, "filename", bfd_get_filename (abfd)); | |
967 | ui_out_text (uiout, "\n"); | |
968 | do_cleanups (inner); | |
969 | ||
970 | return 1; | |
971 | } | |
972 | ||
973 | /* Implement the 'maint info bfd' command. */ | |
974 | ||
975 | static void | |
976 | maintenance_info_bfds (char *arg, int from_tty) | |
977 | { | |
978 | struct cleanup *cleanup; | |
979 | struct ui_out *uiout = current_uiout; | |
980 | ||
981 | cleanup = make_cleanup_ui_out_table_begin_end (uiout, 3, -1, "bfds"); | |
982 | ui_out_table_header (uiout, 10, ui_left, "refcount", "Refcount"); | |
983 | ui_out_table_header (uiout, 18, ui_left, "addr", "Address"); | |
984 | ui_out_table_header (uiout, 40, ui_left, "filename", "Filename"); | |
985 | ||
986 | ui_out_table_body (uiout); | |
987 | htab_traverse (all_bfds, print_one_bfd, uiout); | |
988 | ||
989 | do_cleanups (cleanup); | |
990 | } | |
991 | ||
992 | /* -Wmissing-prototypes */ | |
993 | extern initialize_file_ftype _initialize_gdb_bfd; | |
994 | ||
995 | void | |
996 | _initialize_gdb_bfd (void) | |
997 | { | |
998 | all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
999 | NULL, xcalloc, xfree); | |
1000 | ||
1001 | add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\ | |
1002 | List the BFDs that are currently open."), | |
1003 | &maintenanceinfolist); | |
18989b3c AB |
1004 | |
1005 | add_setshow_boolean_cmd ("bfd-sharing", no_class, | |
1006 | &bfd_sharing, _("\ | |
1007 | Set whether gdb will share bfds that appear to be the same file."), _("\ | |
1008 | Show whether gdb will share bfds that appear to be the same file."), _("\ | |
1009 | When enabled gdb will reuse existing bfds rather than reopening the\n\ | |
1010 | same file. To decide if two files are the same then gdb compares the\n\ | |
1011 | filename, file size, file modification time, and file inode."), | |
1012 | NULL, | |
1013 | &show_bfd_sharing, | |
1014 | &maintenance_set_cmdlist, | |
1015 | &maintenance_show_cmdlist); | |
566f5e3b AB |
1016 | |
1017 | add_setshow_zuinteger_cmd ("bfd-cache", class_maintenance, | |
1018 | &debug_bfd_cache, _("\ | |
1019 | Set bfd cache debugging."), _("\ | |
1020 | Show bfd cache debugging."), _("\ | |
1021 | When non-zero, bfd cache specific debugging is enabled."), | |
1022 | NULL, | |
1023 | &show_bfd_cache_debug, | |
1024 | &setdebuglist, &showdebuglist); | |
d6b28940 | 1025 | } |