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