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