Commit | Line | Data |
---|---|---|
cbb099e8 TT |
1 | /* Definitions for BFD wrappers used by GDB. |
2 | ||
42a4f53d | 3 | Copyright (C) 2011-2019 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 TT |
36 | |
37 | /* An object of this type is stored in the section's user data when | |
38 | mapping a section. */ | |
39 | ||
40 | struct gdb_bfd_section_data | |
41 | { | |
42 | /* Size of the data. */ | |
43 | bfd_size_type size; | |
44 | /* If the data was mmapped, this is the length of the map. */ | |
45 | bfd_size_type map_len; | |
46 | /* The data. If NULL, the section data has not been read. */ | |
47 | void *data; | |
48 | /* If the data was mmapped, this is the map address. */ | |
49 | void *map_addr; | |
50 | }; | |
a4453b7e | 51 | |
d6b28940 TT |
52 | /* A hash table holding every BFD that gdb knows about. This is not |
53 | to be confused with 'gdb_bfd_cache', which is used for sharing | |
54 | BFDs; in contrast, this hash is used just to implement | |
55 | "maint info bfd". */ | |
56 | ||
57 | static htab_t all_bfds; | |
58 | ||
6ec53d05 TT |
59 | /* An object of this type is stored in each BFD's user data. */ |
60 | ||
61 | struct gdb_bfd_data | |
62 | { | |
06d5bbc8 TT |
63 | gdb_bfd_data (bfd *abfd) |
64 | : mtime (bfd_get_mtime (abfd)), | |
65 | size (bfd_get_size (abfd)), | |
66 | relocation_computed (0), | |
67 | needs_relocations (0), | |
68 | crc_computed (0) | |
69 | { | |
70 | struct stat buf; | |
71 | ||
72 | if (bfd_stat (abfd, &buf) == 0) | |
73 | { | |
74 | inode = buf.st_ino; | |
75 | device_id = buf.st_dev; | |
76 | } | |
77 | else | |
78 | { | |
79 | /* The stat failed. */ | |
80 | inode = 0; | |
81 | device_id = 0; | |
82 | } | |
83 | } | |
84 | ||
85 | ~gdb_bfd_data () | |
86 | { | |
06d5bbc8 TT |
87 | } |
88 | ||
6ec53d05 | 89 | /* The reference count. */ |
06d5bbc8 | 90 | int refc = 1; |
6ec53d05 TT |
91 | |
92 | /* The mtime of the BFD at the point the cache entry was made. */ | |
93 | time_t mtime; | |
b82d08cd | 94 | |
c04fe68f AB |
95 | /* The file size (in bytes) at the point the cache entry was made. */ |
96 | off_t size; | |
97 | ||
98 | /* The inode of the file at the point the cache entry was made. */ | |
99 | ino_t inode; | |
100 | ||
101 | /* The device id of the file at the point the cache entry was made. */ | |
102 | dev_t device_id; | |
103 | ||
1da77581 TT |
104 | /* This is true if we have determined whether this BFD has any |
105 | sections requiring relocation. */ | |
106 | unsigned int relocation_computed : 1; | |
107 | ||
108 | /* This is true if any section needs relocation. */ | |
109 | unsigned int needs_relocations : 1; | |
110 | ||
dccee2de TT |
111 | /* This is true if we have successfully computed the file's CRC. */ |
112 | unsigned int crc_computed : 1; | |
113 | ||
114 | /* The file's CRC. */ | |
06d5bbc8 | 115 | unsigned long crc = 0; |
dccee2de | 116 | |
b82d08cd TT |
117 | /* If the BFD comes from an archive, this points to the archive's |
118 | BFD. Otherwise, this is NULL. */ | |
06d5bbc8 | 119 | bfd *archive_bfd = nullptr; |
e992eda4 | 120 | |
13aaf454 | 121 | /* Table of all the bfds this bfd has included. */ |
d5833c62 | 122 | std::vector<gdb_bfd_ref_ptr> included_bfds; |
13aaf454 | 123 | |
e992eda4 | 124 | /* The registry. */ |
06d5bbc8 | 125 | REGISTRY_FIELDS = {}; |
6ec53d05 TT |
126 | }; |
127 | ||
e992eda4 TT |
128 | #define GDB_BFD_DATA_ACCESSOR(ABFD) \ |
129 | ((struct gdb_bfd_data *) bfd_usrdata (ABFD)) | |
130 | ||
131 | DEFINE_REGISTRY (bfd, GDB_BFD_DATA_ACCESSOR) | |
132 | ||
6ec53d05 TT |
133 | /* A hash table storing all the BFDs maintained in the cache. */ |
134 | ||
135 | static htab_t gdb_bfd_cache; | |
136 | ||
18989b3c AB |
137 | /* When true gdb will reuse an existing bfd object if the filename, |
138 | modification time, and file size all match. */ | |
139 | ||
140 | static int bfd_sharing = 1; | |
141 | static void | |
142 | show_bfd_sharing (struct ui_file *file, int from_tty, | |
143 | struct cmd_list_element *c, const char *value) | |
144 | { | |
145 | fprintf_filtered (file, _("BFD sharing is %s.\n"), value); | |
146 | } | |
147 | ||
566f5e3b AB |
148 | /* When non-zero debugging of the bfd caches is enabled. */ |
149 | ||
150 | static unsigned int debug_bfd_cache; | |
151 | static void | |
152 | show_bfd_cache_debug (struct ui_file *file, int from_tty, | |
153 | struct cmd_list_element *c, const char *value) | |
154 | { | |
155 | fprintf_filtered (file, _("BFD cache debugging is %s.\n"), value); | |
156 | } | |
157 | ||
6ec53d05 TT |
158 | /* The type of an object being looked up in gdb_bfd_cache. We use |
159 | htab's capability of storing one kind of object (BFD in this case) | |
160 | and using a different sort of object for searching. */ | |
161 | ||
162 | struct gdb_bfd_cache_search | |
163 | { | |
164 | /* The filename. */ | |
165 | const char *filename; | |
166 | /* The mtime. */ | |
167 | time_t mtime; | |
c04fe68f AB |
168 | /* The file size (in bytes). */ |
169 | off_t size; | |
170 | /* The inode of the file. */ | |
171 | ino_t inode; | |
172 | /* The device id of the file. */ | |
173 | dev_t device_id; | |
6ec53d05 TT |
174 | }; |
175 | ||
176 | /* A hash function for BFDs. */ | |
177 | ||
178 | static hashval_t | |
179 | hash_bfd (const void *b) | |
180 | { | |
9a3c8263 | 181 | const bfd *abfd = (const struct bfd *) b; |
6ec53d05 TT |
182 | |
183 | /* It is simplest to just hash the filename. */ | |
184 | return htab_hash_string (bfd_get_filename (abfd)); | |
185 | } | |
186 | ||
187 | /* An equality function for BFDs. Note that this expects the caller | |
188 | to search using struct gdb_bfd_cache_search only, not BFDs. */ | |
189 | ||
190 | static int | |
191 | eq_bfd (const void *a, const void *b) | |
192 | { | |
9a3c8263 SM |
193 | const bfd *abfd = (const struct bfd *) a; |
194 | const struct gdb_bfd_cache_search *s | |
195 | = (const struct gdb_bfd_cache_search *) b; | |
196 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
6ec53d05 TT |
197 | |
198 | return (gdata->mtime == s->mtime | |
c04fe68f AB |
199 | && gdata->size == s->size |
200 | && gdata->inode == s->inode | |
201 | && gdata->device_id == s->device_id | |
6ec53d05 TT |
202 | && strcmp (bfd_get_filename (abfd), s->filename) == 0); |
203 | } | |
204 | ||
205 | /* See gdb_bfd.h. */ | |
206 | ||
f08e97fe GB |
207 | int |
208 | is_target_filename (const char *name) | |
209 | { | |
210 | return startswith (name, TARGET_SYSROOT_PREFIX); | |
211 | } | |
212 | ||
213 | /* See gdb_bfd.h. */ | |
214 | ||
215 | int | |
216 | gdb_bfd_has_target_filename (struct bfd *abfd) | |
217 | { | |
218 | return is_target_filename (bfd_get_filename (abfd)); | |
219 | } | |
220 | ||
221 | ||
222 | /* Return the system error number corresponding to ERRNUM. */ | |
223 | ||
224 | static int | |
225 | fileio_errno_to_host (int errnum) | |
226 | { | |
227 | switch (errnum) | |
228 | { | |
229 | case FILEIO_EPERM: | |
230 | return EPERM; | |
231 | case FILEIO_ENOENT: | |
232 | return ENOENT; | |
233 | case FILEIO_EINTR: | |
234 | return EINTR; | |
235 | case FILEIO_EIO: | |
236 | return EIO; | |
237 | case FILEIO_EBADF: | |
238 | return EBADF; | |
239 | case FILEIO_EACCES: | |
240 | return EACCES; | |
241 | case FILEIO_EFAULT: | |
242 | return EFAULT; | |
243 | case FILEIO_EBUSY: | |
244 | return EBUSY; | |
245 | case FILEIO_EEXIST: | |
246 | return EEXIST; | |
247 | case FILEIO_ENODEV: | |
248 | return ENODEV; | |
249 | case FILEIO_ENOTDIR: | |
250 | return ENOTDIR; | |
251 | case FILEIO_EISDIR: | |
252 | return EISDIR; | |
253 | case FILEIO_EINVAL: | |
254 | return EINVAL; | |
255 | case FILEIO_ENFILE: | |
256 | return ENFILE; | |
257 | case FILEIO_EMFILE: | |
258 | return EMFILE; | |
259 | case FILEIO_EFBIG: | |
260 | return EFBIG; | |
261 | case FILEIO_ENOSPC: | |
262 | return ENOSPC; | |
263 | case FILEIO_ESPIPE: | |
264 | return ESPIPE; | |
265 | case FILEIO_EROFS: | |
266 | return EROFS; | |
267 | case FILEIO_ENOSYS: | |
268 | return ENOSYS; | |
269 | case FILEIO_ENAMETOOLONG: | |
270 | return ENAMETOOLONG; | |
271 | } | |
272 | return -1; | |
273 | } | |
274 | ||
275 | /* Wrapper for target_fileio_open suitable for passing as the | |
276 | OPEN_FUNC argument to gdb_bfd_openr_iovec. The supplied | |
277 | OPEN_CLOSURE is unused. */ | |
278 | ||
279 | static void * | |
07c138c8 | 280 | gdb_bfd_iovec_fileio_open (struct bfd *abfd, void *inferior) |
f08e97fe GB |
281 | { |
282 | const char *filename = bfd_get_filename (abfd); | |
283 | int fd, target_errno; | |
284 | int *stream; | |
285 | ||
286 | gdb_assert (is_target_filename (filename)); | |
287 | ||
4313b8c0 GB |
288 | fd = target_fileio_open_warn_if_slow ((struct inferior *) inferior, |
289 | filename | |
290 | + strlen (TARGET_SYSROOT_PREFIX), | |
291 | FILEIO_O_RDONLY, 0, | |
292 | &target_errno); | |
f08e97fe GB |
293 | if (fd == -1) |
294 | { | |
295 | errno = fileio_errno_to_host (target_errno); | |
296 | bfd_set_error (bfd_error_system_call); | |
297 | return NULL; | |
298 | } | |
299 | ||
300 | stream = XCNEW (int); | |
301 | *stream = fd; | |
302 | return stream; | |
303 | } | |
304 | ||
305 | /* Wrapper for target_fileio_pread suitable for passing as the | |
306 | PREAD_FUNC argument to gdb_bfd_openr_iovec. */ | |
307 | ||
308 | static file_ptr | |
309 | gdb_bfd_iovec_fileio_pread (struct bfd *abfd, void *stream, void *buf, | |
310 | file_ptr nbytes, file_ptr offset) | |
311 | { | |
312 | int fd = *(int *) stream; | |
313 | int target_errno; | |
314 | file_ptr pos, bytes; | |
315 | ||
316 | pos = 0; | |
317 | while (nbytes > pos) | |
318 | { | |
2d7711a3 GB |
319 | QUIT; |
320 | ||
f08e97fe GB |
321 | bytes = target_fileio_pread (fd, (gdb_byte *) buf + pos, |
322 | nbytes - pos, offset + pos, | |
323 | &target_errno); | |
324 | if (bytes == 0) | |
325 | /* Success, but no bytes, means end-of-file. */ | |
326 | break; | |
327 | if (bytes == -1) | |
328 | { | |
329 | errno = fileio_errno_to_host (target_errno); | |
330 | bfd_set_error (bfd_error_system_call); | |
331 | return -1; | |
332 | } | |
333 | ||
334 | pos += bytes; | |
335 | } | |
336 | ||
337 | return pos; | |
338 | } | |
339 | ||
340 | /* Wrapper for target_fileio_close suitable for passing as the | |
341 | CLOSE_FUNC argument to gdb_bfd_openr_iovec. */ | |
342 | ||
343 | static int | |
344 | gdb_bfd_iovec_fileio_close (struct bfd *abfd, void *stream) | |
345 | { | |
346 | int fd = *(int *) stream; | |
347 | int target_errno; | |
348 | ||
349 | xfree (stream); | |
350 | ||
351 | /* Ignore errors on close. These may happen with remote | |
352 | targets if the connection has already been torn down. */ | |
353 | target_fileio_close (fd, &target_errno); | |
354 | ||
355 | /* Zero means success. */ | |
356 | return 0; | |
357 | } | |
358 | ||
359 | /* Wrapper for target_fileio_fstat suitable for passing as the | |
360 | STAT_FUNC argument to gdb_bfd_openr_iovec. */ | |
361 | ||
362 | static int | |
363 | gdb_bfd_iovec_fileio_fstat (struct bfd *abfd, void *stream, | |
364 | struct stat *sb) | |
365 | { | |
366 | int fd = *(int *) stream; | |
367 | int target_errno; | |
368 | int result; | |
369 | ||
370 | result = target_fileio_fstat (fd, sb, &target_errno); | |
371 | if (result == -1) | |
372 | { | |
373 | errno = fileio_errno_to_host (target_errno); | |
374 | bfd_set_error (bfd_error_system_call); | |
375 | } | |
376 | ||
377 | return result; | |
378 | } | |
379 | ||
380 | /* See gdb_bfd.h. */ | |
381 | ||
192b62ce | 382 | gdb_bfd_ref_ptr |
6ec53d05 TT |
383 | gdb_bfd_open (const char *name, const char *target, int fd) |
384 | { | |
385 | hashval_t hash; | |
386 | void **slot; | |
387 | bfd *abfd; | |
388 | struct gdb_bfd_cache_search search; | |
389 | struct stat st; | |
390 | ||
f08e97fe GB |
391 | if (is_target_filename (name)) |
392 | { | |
393 | if (!target_filesystem_is_local ()) | |
394 | { | |
395 | gdb_assert (fd == -1); | |
396 | ||
e3dd7556 | 397 | return gdb_bfd_openr_iovec (name, target, |
07c138c8 GB |
398 | gdb_bfd_iovec_fileio_open, |
399 | current_inferior (), | |
f08e97fe GB |
400 | gdb_bfd_iovec_fileio_pread, |
401 | gdb_bfd_iovec_fileio_close, | |
402 | gdb_bfd_iovec_fileio_fstat); | |
f08e97fe GB |
403 | } |
404 | ||
405 | name += strlen (TARGET_SYSROOT_PREFIX); | |
406 | } | |
407 | ||
6ec53d05 TT |
408 | if (gdb_bfd_cache == NULL) |
409 | gdb_bfd_cache = htab_create_alloc (1, hash_bfd, eq_bfd, NULL, | |
410 | xcalloc, xfree); | |
411 | ||
412 | if (fd == -1) | |
413 | { | |
614c279d | 414 | fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0); |
6ec53d05 TT |
415 | if (fd == -1) |
416 | { | |
417 | bfd_set_error (bfd_error_system_call); | |
418 | return NULL; | |
419 | } | |
420 | } | |
421 | ||
422 | search.filename = name; | |
423 | if (fstat (fd, &st) < 0) | |
424 | { | |
425 | /* Weird situation here. */ | |
426 | search.mtime = 0; | |
c04fe68f AB |
427 | search.size = 0; |
428 | search.inode = 0; | |
429 | search.device_id = 0; | |
6ec53d05 TT |
430 | } |
431 | else | |
c04fe68f AB |
432 | { |
433 | search.mtime = st.st_mtime; | |
434 | search.size = st.st_size; | |
435 | search.inode = st.st_ino; | |
436 | search.device_id = st.st_dev; | |
437 | } | |
6ec53d05 TT |
438 | |
439 | /* Note that this must compute the same result as hash_bfd. */ | |
440 | hash = htab_hash_string (name); | |
441 | /* Note that we cannot use htab_find_slot_with_hash here, because | |
442 | opening the BFD may fail; and this would violate hashtab | |
443 | invariants. */ | |
9a3c8263 | 444 | abfd = (struct bfd *) htab_find_with_hash (gdb_bfd_cache, &search, hash); |
18989b3c | 445 | if (bfd_sharing && abfd != NULL) |
6ec53d05 | 446 | { |
566f5e3b AB |
447 | if (debug_bfd_cache) |
448 | fprintf_unfiltered (gdb_stdlog, | |
449 | "Reusing cached bfd %s for %s\n", | |
450 | host_address_to_string (abfd), | |
451 | bfd_get_filename (abfd)); | |
6ec53d05 | 452 | close (fd); |
1831a9f9 | 453 | return gdb_bfd_ref_ptr::new_reference (abfd); |
6ec53d05 TT |
454 | } |
455 | ||
456 | abfd = bfd_fopen (name, target, FOPEN_RB, fd); | |
457 | if (abfd == NULL) | |
458 | return NULL; | |
459 | ||
566f5e3b AB |
460 | if (debug_bfd_cache) |
461 | fprintf_unfiltered (gdb_stdlog, | |
462 | "Creating new bfd %s for %s\n", | |
463 | host_address_to_string (abfd), | |
464 | bfd_get_filename (abfd)); | |
465 | ||
18989b3c AB |
466 | if (bfd_sharing) |
467 | { | |
468 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, INSERT); | |
469 | gdb_assert (!*slot); | |
470 | *slot = abfd; | |
471 | } | |
6ec53d05 | 472 | |
1831a9f9 | 473 | return gdb_bfd_ref_ptr::new_reference (abfd); |
6ec53d05 TT |
474 | } |
475 | ||
4bf44c1c TT |
476 | /* A helper function that releases any section data attached to the |
477 | BFD. */ | |
478 | ||
479 | static void | |
480 | free_one_bfd_section (bfd *abfd, asection *sectp, void *ignore) | |
481 | { | |
9a3c8263 SM |
482 | struct gdb_bfd_section_data *sect |
483 | = (struct gdb_bfd_section_data *) bfd_get_section_userdata (abfd, sectp); | |
4bf44c1c TT |
484 | |
485 | if (sect != NULL && sect->data != NULL) | |
486 | { | |
487 | #ifdef HAVE_MMAP | |
488 | if (sect->map_addr != NULL) | |
489 | { | |
490 | int res; | |
491 | ||
492 | res = munmap (sect->map_addr, sect->map_len); | |
493 | gdb_assert (res == 0); | |
494 | } | |
495 | else | |
496 | #endif | |
497 | xfree (sect->data); | |
498 | } | |
499 | } | |
500 | ||
cbb099e8 TT |
501 | /* Close ABFD, and warn if that fails. */ |
502 | ||
503 | static int | |
504 | gdb_bfd_close_or_warn (struct bfd *abfd) | |
505 | { | |
506 | int ret; | |
507 | char *name = bfd_get_filename (abfd); | |
508 | ||
4bf44c1c TT |
509 | bfd_map_over_sections (abfd, free_one_bfd_section, NULL); |
510 | ||
cbb099e8 TT |
511 | ret = bfd_close (abfd); |
512 | ||
513 | if (!ret) | |
514 | warning (_("cannot close \"%s\": %s"), | |
515 | name, bfd_errmsg (bfd_get_error ())); | |
516 | ||
517 | return ret; | |
518 | } | |
519 | ||
596f7d67 | 520 | /* See gdb_bfd.h. */ |
cbb099e8 | 521 | |
520b0001 | 522 | void |
cbb099e8 TT |
523 | gdb_bfd_ref (struct bfd *abfd) |
524 | { | |
6ec53d05 | 525 | struct gdb_bfd_data *gdata; |
d6b28940 | 526 | void **slot; |
cbb099e8 TT |
527 | |
528 | if (abfd == NULL) | |
520b0001 | 529 | return; |
cbb099e8 | 530 | |
9a3c8263 | 531 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
cbb099e8 | 532 | |
566f5e3b AB |
533 | if (debug_bfd_cache) |
534 | fprintf_unfiltered (gdb_stdlog, | |
535 | "Increase reference count on bfd %s (%s)\n", | |
536 | host_address_to_string (abfd), | |
537 | bfd_get_filename (abfd)); | |
538 | ||
6ec53d05 | 539 | if (gdata != NULL) |
cbb099e8 | 540 | { |
6ec53d05 | 541 | gdata->refc += 1; |
520b0001 | 542 | return; |
cbb099e8 TT |
543 | } |
544 | ||
ea9f10bb TT |
545 | /* Ask BFD to decompress sections in bfd_get_full_section_contents. */ |
546 | abfd->flags |= BFD_DECOMPRESS; | |
547 | ||
06d5bbc8 | 548 | gdata = new gdb_bfd_data (abfd); |
6ec53d05 | 549 | bfd_usrdata (abfd) = gdata; |
e992eda4 TT |
550 | bfd_alloc_data (abfd); |
551 | ||
d6b28940 TT |
552 | /* This is the first we've seen it, so add it to the hash table. */ |
553 | slot = htab_find_slot (all_bfds, abfd, INSERT); | |
554 | gdb_assert (slot && !*slot); | |
555 | *slot = abfd; | |
cbb099e8 TT |
556 | } |
557 | ||
596f7d67 | 558 | /* See gdb_bfd.h. */ |
cbb099e8 TT |
559 | |
560 | void | |
561 | gdb_bfd_unref (struct bfd *abfd) | |
562 | { | |
6ec53d05 TT |
563 | struct gdb_bfd_data *gdata; |
564 | struct gdb_bfd_cache_search search; | |
06d5bbc8 | 565 | bfd *archive_bfd; |
cbb099e8 TT |
566 | |
567 | if (abfd == NULL) | |
568 | return; | |
569 | ||
9a3c8263 | 570 | gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
6ec53d05 | 571 | gdb_assert (gdata->refc >= 1); |
cbb099e8 | 572 | |
6ec53d05 TT |
573 | gdata->refc -= 1; |
574 | if (gdata->refc > 0) | |
566f5e3b AB |
575 | { |
576 | if (debug_bfd_cache) | |
577 | fprintf_unfiltered (gdb_stdlog, | |
578 | "Decrease reference count on bfd %s (%s)\n", | |
579 | host_address_to_string (abfd), | |
580 | bfd_get_filename (abfd)); | |
581 | return; | |
582 | } | |
583 | ||
584 | if (debug_bfd_cache) | |
585 | fprintf_unfiltered (gdb_stdlog, | |
586 | "Delete final reference count on bfd %s (%s)\n", | |
587 | host_address_to_string (abfd), | |
588 | bfd_get_filename (abfd)); | |
cbb099e8 | 589 | |
b82d08cd | 590 | archive_bfd = gdata->archive_bfd; |
6ec53d05 TT |
591 | search.filename = bfd_get_filename (abfd); |
592 | ||
593 | if (gdb_bfd_cache && search.filename) | |
594 | { | |
595 | hashval_t hash = htab_hash_string (search.filename); | |
596 | void **slot; | |
597 | ||
598 | search.mtime = gdata->mtime; | |
c04fe68f AB |
599 | search.size = gdata->size; |
600 | search.inode = gdata->inode; | |
601 | search.device_id = gdata->device_id; | |
6ec53d05 TT |
602 | slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, |
603 | NO_INSERT); | |
604 | ||
605 | if (slot && *slot) | |
606 | htab_clear_slot (gdb_bfd_cache, slot); | |
607 | } | |
608 | ||
e992eda4 | 609 | bfd_free_data (abfd); |
06d5bbc8 | 610 | delete gdata; |
cbb099e8 TT |
611 | bfd_usrdata (abfd) = NULL; /* Paranoia. */ |
612 | ||
d6b28940 TT |
613 | htab_remove_elt (all_bfds, abfd); |
614 | ||
cbb099e8 | 615 | gdb_bfd_close_or_warn (abfd); |
b82d08cd TT |
616 | |
617 | gdb_bfd_unref (archive_bfd); | |
cbb099e8 | 618 | } |
4bf44c1c TT |
619 | |
620 | /* A helper function that returns the section data descriptor | |
621 | associated with SECTION. If no such descriptor exists, a new one | |
622 | is allocated and cleared. */ | |
623 | ||
624 | static struct gdb_bfd_section_data * | |
625 | get_section_descriptor (asection *section) | |
626 | { | |
627 | struct gdb_bfd_section_data *result; | |
628 | ||
9a3c8263 SM |
629 | result = ((struct gdb_bfd_section_data *) |
630 | bfd_get_section_userdata (section->owner, section)); | |
4bf44c1c TT |
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)) | |
41667530 MG |
705 | { |
706 | warning (_("Can't read data for section '%s' in file '%s'"), | |
707 | bfd_get_section_name (abfd, sectp), | |
708 | bfd_get_filename (abfd)); | |
709 | /* Set size to 0 to prevent further attempts to read the invalid | |
710 | section. */ | |
711 | *size = 0; | |
712 | return (const gdb_byte *) NULL; | |
713 | } | |
ea9f10bb | 714 | descriptor->data = data; |
4bf44c1c TT |
715 | |
716 | done: | |
717 | gdb_assert (descriptor->data != NULL); | |
718 | *size = descriptor->size; | |
9a3c8263 | 719 | return (const gdb_byte *) descriptor->data; |
4bf44c1c | 720 | } |
64c31149 | 721 | |
dccee2de TT |
722 | /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and |
723 | return 1. Otherwise print a warning and return 0. ABFD seek position is | |
724 | not preserved. */ | |
725 | ||
726 | static int | |
727 | get_file_crc (bfd *abfd, unsigned long *file_crc_return) | |
728 | { | |
729 | unsigned long file_crc = 0; | |
730 | ||
731 | if (bfd_seek (abfd, 0, SEEK_SET) != 0) | |
732 | { | |
733 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
734 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
735 | return 0; | |
736 | } | |
737 | ||
738 | for (;;) | |
739 | { | |
740 | gdb_byte buffer[8 * 1024]; | |
741 | bfd_size_type count; | |
742 | ||
743 | count = bfd_bread (buffer, sizeof (buffer), abfd); | |
744 | if (count == (bfd_size_type) -1) | |
745 | { | |
746 | warning (_("Problem reading \"%s\" for CRC: %s"), | |
747 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
748 | return 0; | |
749 | } | |
750 | if (count == 0) | |
751 | break; | |
752 | file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count); | |
753 | } | |
754 | ||
755 | *file_crc_return = file_crc; | |
756 | return 1; | |
757 | } | |
758 | ||
759 | /* See gdb_bfd.h. */ | |
760 | ||
761 | int | |
762 | gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out) | |
763 | { | |
9a3c8263 | 764 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
dccee2de TT |
765 | |
766 | if (!gdata->crc_computed) | |
767 | gdata->crc_computed = get_file_crc (abfd, &gdata->crc); | |
768 | ||
769 | if (gdata->crc_computed) | |
770 | *crc_out = gdata->crc; | |
771 | return gdata->crc_computed; | |
772 | } | |
773 | ||
64c31149 TT |
774 | \f |
775 | ||
776 | /* See gdb_bfd.h. */ | |
777 | ||
192b62ce | 778 | gdb_bfd_ref_ptr |
64c31149 TT |
779 | gdb_bfd_fopen (const char *filename, const char *target, const char *mode, |
780 | int fd) | |
781 | { | |
782 | bfd *result = bfd_fopen (filename, target, mode, fd); | |
783 | ||
1831a9f9 | 784 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
785 | } |
786 | ||
787 | /* See gdb_bfd.h. */ | |
788 | ||
192b62ce | 789 | gdb_bfd_ref_ptr |
64c31149 TT |
790 | gdb_bfd_openr (const char *filename, const char *target) |
791 | { | |
792 | bfd *result = bfd_openr (filename, target); | |
793 | ||
1831a9f9 | 794 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
795 | } |
796 | ||
797 | /* See gdb_bfd.h. */ | |
798 | ||
192b62ce | 799 | gdb_bfd_ref_ptr |
64c31149 TT |
800 | gdb_bfd_openw (const char *filename, const char *target) |
801 | { | |
802 | bfd *result = bfd_openw (filename, target); | |
803 | ||
1831a9f9 | 804 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
805 | } |
806 | ||
807 | /* See gdb_bfd.h. */ | |
808 | ||
192b62ce | 809 | gdb_bfd_ref_ptr |
64c31149 TT |
810 | gdb_bfd_openr_iovec (const char *filename, const char *target, |
811 | void *(*open_func) (struct bfd *nbfd, | |
812 | void *open_closure), | |
813 | void *open_closure, | |
814 | file_ptr (*pread_func) (struct bfd *nbfd, | |
815 | void *stream, | |
816 | void *buf, | |
817 | file_ptr nbytes, | |
818 | file_ptr offset), | |
819 | int (*close_func) (struct bfd *nbfd, | |
820 | void *stream), | |
821 | int (*stat_func) (struct bfd *abfd, | |
822 | void *stream, | |
823 | struct stat *sb)) | |
824 | { | |
825 | bfd *result = bfd_openr_iovec (filename, target, | |
826 | open_func, open_closure, | |
827 | pread_func, close_func, stat_func); | |
828 | ||
1831a9f9 | 829 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 TT |
830 | } |
831 | ||
832 | /* See gdb_bfd.h. */ | |
833 | ||
0cd61f44 TT |
834 | void |
835 | gdb_bfd_mark_parent (bfd *child, bfd *parent) | |
836 | { | |
837 | struct gdb_bfd_data *gdata; | |
838 | ||
839 | gdb_bfd_ref (child); | |
840 | /* No need to stash the filename here, because we also keep a | |
841 | reference on the parent archive. */ | |
842 | ||
9a3c8263 | 843 | gdata = (struct gdb_bfd_data *) bfd_usrdata (child); |
0cd61f44 TT |
844 | if (gdata->archive_bfd == NULL) |
845 | { | |
846 | gdata->archive_bfd = parent; | |
847 | gdb_bfd_ref (parent); | |
848 | } | |
849 | else | |
850 | gdb_assert (gdata->archive_bfd == parent); | |
851 | } | |
852 | ||
853 | /* See gdb_bfd.h. */ | |
854 | ||
192b62ce | 855 | gdb_bfd_ref_ptr |
64c31149 TT |
856 | gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous) |
857 | { | |
858 | bfd *result = bfd_openr_next_archived_file (archive, previous); | |
859 | ||
860 | if (result) | |
0cd61f44 | 861 | gdb_bfd_mark_parent (result, archive); |
64c31149 | 862 | |
192b62ce | 863 | return gdb_bfd_ref_ptr (result); |
64c31149 TT |
864 | } |
865 | ||
866 | /* See gdb_bfd.h. */ | |
867 | ||
13aaf454 DE |
868 | void |
869 | gdb_bfd_record_inclusion (bfd *includer, bfd *includee) | |
870 | { | |
871 | struct gdb_bfd_data *gdata; | |
872 | ||
9a3c8263 | 873 | gdata = (struct gdb_bfd_data *) bfd_usrdata (includer); |
1831a9f9 | 874 | gdata->included_bfds.push_back (gdb_bfd_ref_ptr::new_reference (includee)); |
13aaf454 DE |
875 | } |
876 | ||
877 | /* See gdb_bfd.h. */ | |
878 | ||
192b62ce | 879 | gdb_bfd_ref_ptr |
64c31149 TT |
880 | gdb_bfd_fdopenr (const char *filename, const char *target, int fd) |
881 | { | |
882 | bfd *result = bfd_fdopenr (filename, target, fd); | |
883 | ||
1831a9f9 | 884 | return gdb_bfd_ref_ptr::new_reference (result); |
64c31149 | 885 | } |
d6b28940 TT |
886 | |
887 | \f | |
888 | ||
65cf3563 TT |
889 | gdb_static_assert (ARRAY_SIZE (_bfd_std_section) == 4); |
890 | ||
891 | /* See gdb_bfd.h. */ | |
892 | ||
893 | int | |
894 | gdb_bfd_section_index (bfd *abfd, asection *section) | |
895 | { | |
896 | if (section == NULL) | |
897 | return -1; | |
898 | else if (section == bfd_com_section_ptr) | |
ce9c0ca1 | 899 | return bfd_count_sections (abfd); |
65cf3563 | 900 | else if (section == bfd_und_section_ptr) |
ce9c0ca1 | 901 | return bfd_count_sections (abfd) + 1; |
65cf3563 | 902 | else if (section == bfd_abs_section_ptr) |
ce9c0ca1 | 903 | return bfd_count_sections (abfd) + 2; |
65cf3563 | 904 | else if (section == bfd_ind_section_ptr) |
ce9c0ca1 | 905 | return bfd_count_sections (abfd) + 3; |
65cf3563 TT |
906 | return section->index; |
907 | } | |
908 | ||
909 | /* See gdb_bfd.h. */ | |
910 | ||
911 | int | |
912 | gdb_bfd_count_sections (bfd *abfd) | |
913 | { | |
914 | return bfd_count_sections (abfd) + 4; | |
915 | } | |
916 | ||
1da77581 TT |
917 | /* See gdb_bfd.h. */ |
918 | ||
919 | int | |
920 | gdb_bfd_requires_relocations (bfd *abfd) | |
921 | { | |
9a3c8263 | 922 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); |
1da77581 TT |
923 | |
924 | if (gdata->relocation_computed == 0) | |
925 | { | |
926 | asection *sect; | |
927 | ||
928 | for (sect = abfd->sections; sect != NULL; sect = sect->next) | |
929 | if ((sect->flags & SEC_RELOC) != 0) | |
930 | { | |
931 | gdata->needs_relocations = 1; | |
932 | break; | |
933 | } | |
934 | ||
935 | gdata->relocation_computed = 1; | |
936 | } | |
937 | ||
938 | return gdata->needs_relocations; | |
939 | } | |
940 | ||
65cf3563 TT |
941 | \f |
942 | ||
d6b28940 TT |
943 | /* A callback for htab_traverse that prints a single BFD. */ |
944 | ||
945 | static int | |
946 | print_one_bfd (void **slot, void *data) | |
947 | { | |
9a3c8263 SM |
948 | bfd *abfd = (struct bfd *) *slot; |
949 | struct gdb_bfd_data *gdata = (struct gdb_bfd_data *) bfd_usrdata (abfd); | |
950 | struct ui_out *uiout = (struct ui_out *) data; | |
d6b28940 | 951 | |
2e783024 | 952 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
112e8700 SM |
953 | uiout->field_int ("refcount", gdata->refc); |
954 | uiout->field_string ("addr", host_address_to_string (abfd)); | |
955 | uiout->field_string ("filename", bfd_get_filename (abfd)); | |
956 | uiout->text ("\n"); | |
d6b28940 TT |
957 | |
958 | return 1; | |
959 | } | |
960 | ||
961 | /* Implement the 'maint info bfd' command. */ | |
962 | ||
963 | static void | |
e4e33335 | 964 | maintenance_info_bfds (const char *arg, int from_tty) |
d6b28940 | 965 | { |
d6b28940 TT |
966 | struct ui_out *uiout = current_uiout; |
967 | ||
4a2b031d | 968 | ui_out_emit_table table_emitter (uiout, 3, -1, "bfds"); |
112e8700 SM |
969 | uiout->table_header (10, ui_left, "refcount", "Refcount"); |
970 | uiout->table_header (18, ui_left, "addr", "Address"); | |
971 | uiout->table_header (40, ui_left, "filename", "Filename"); | |
d6b28940 | 972 | |
112e8700 | 973 | uiout->table_body (); |
d6b28940 | 974 | htab_traverse (all_bfds, print_one_bfd, uiout); |
d6b28940 TT |
975 | } |
976 | ||
d6b28940 TT |
977 | void |
978 | _initialize_gdb_bfd (void) | |
979 | { | |
980 | all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
981 | NULL, xcalloc, xfree); | |
982 | ||
983 | add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\ | |
984 | List the BFDs that are currently open."), | |
985 | &maintenanceinfolist); | |
18989b3c AB |
986 | |
987 | add_setshow_boolean_cmd ("bfd-sharing", no_class, | |
988 | &bfd_sharing, _("\ | |
989 | Set whether gdb will share bfds that appear to be the same file."), _("\ | |
990 | Show whether gdb will share bfds that appear to be the same file."), _("\ | |
991 | When enabled gdb will reuse existing bfds rather than reopening the\n\ | |
992 | same file. To decide if two files are the same then gdb compares the\n\ | |
993 | filename, file size, file modification time, and file inode."), | |
994 | NULL, | |
995 | &show_bfd_sharing, | |
996 | &maintenance_set_cmdlist, | |
997 | &maintenance_show_cmdlist); | |
566f5e3b AB |
998 | |
999 | add_setshow_zuinteger_cmd ("bfd-cache", class_maintenance, | |
1000 | &debug_bfd_cache, _("\ | |
1001 | Set bfd cache debugging."), _("\ | |
1002 | Show bfd cache debugging."), _("\ | |
1003 | When non-zero, bfd cache specific debugging is enabled."), | |
1004 | NULL, | |
1005 | &show_bfd_cache_debug, | |
1006 | &setdebuglist, &showdebuglist); | |
d6b28940 | 1007 | } |