Commit | Line | Data |
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13437d4b | 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
14a5e767 | 2 | |
32d0add0 | 3 | Copyright (C) 1990-2015 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 19 | |
c906108c SS |
20 | #include "defs.h" |
21 | ||
c906108c | 22 | #include <sys/types.h> |
c906108c | 23 | #include <fcntl.h> |
c906108c SS |
24 | #include "symtab.h" |
25 | #include "bfd.h" | |
26 | #include "symfile.h" | |
27 | #include "objfiles.h" | |
28 | #include "gdbcore.h" | |
29 | #include "command.h" | |
30 | #include "target.h" | |
31 | #include "frame.h" | |
88987551 | 32 | #include "gdb_regex.h" |
c906108c SS |
33 | #include "inferior.h" |
34 | #include "environ.h" | |
35 | #include "language.h" | |
36 | #include "gdbcmd.h" | |
fa58ee11 | 37 | #include "completer.h" |
fe4e3eb8 | 38 | #include "filenames.h" /* for DOSish file names */ |
4646aa9d | 39 | #include "exec.h" |
13437d4b | 40 | #include "solist.h" |
84acb35a | 41 | #include "observer.h" |
dbda9972 | 42 | #include "readline/readline.h" |
f1838a98 | 43 | #include "remote.h" |
2c0b251b | 44 | #include "solib.h" |
55333a84 | 45 | #include "interps.h" |
ab38a727 | 46 | #include "filesystem.h" |
cbb099e8 | 47 | #include "gdb_bfd.h" |
614c279d | 48 | #include "filestuff.h" |
c906108c | 49 | |
66aba65d MK |
50 | /* Architecture-specific operations. */ |
51 | ||
52 | /* Per-architecture data key. */ | |
53 | static struct gdbarch_data *solib_data; | |
54 | ||
55 | static void * | |
56 | solib_init (struct obstack *obstack) | |
57 | { | |
58 | struct target_so_ops **ops; | |
59 | ||
60 | ops = OBSTACK_ZALLOC (obstack, struct target_so_ops *); | |
61 | *ops = current_target_so_ops; | |
62 | return ops; | |
63 | } | |
64 | ||
3641da11 | 65 | static const struct target_so_ops * |
66aba65d MK |
66 | solib_ops (struct gdbarch *gdbarch) |
67 | { | |
3641da11 | 68 | const struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data); |
433759f7 | 69 | |
66aba65d MK |
70 | return *ops; |
71 | } | |
7d522c90 DJ |
72 | |
73 | /* Set the solib operations for GDBARCH to NEW_OPS. */ | |
74 | ||
75 | void | |
3641da11 | 76 | set_solib_ops (struct gdbarch *gdbarch, const struct target_so_ops *new_ops) |
7d522c90 | 77 | { |
3641da11 | 78 | const struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data); |
433759f7 | 79 | |
7d522c90 DJ |
80 | *ops = new_ops; |
81 | } | |
66aba65d MK |
82 | \f |
83 | ||
13437d4b | 84 | /* external data declarations */ |
c906108c | 85 | |
7d522c90 DJ |
86 | /* FIXME: gdbarch needs to control this variable, or else every |
87 | configuration needs to call set_solib_ops. */ | |
13437d4b | 88 | struct target_so_ops *current_target_so_ops; |
23e04971 | 89 | |
6c95b8df PA |
90 | /* List of known shared objects */ |
91 | #define so_list_head current_program_space->so_list | |
23e04971 | 92 | |
c906108c SS |
93 | /* Local function prototypes */ |
94 | ||
c906108c SS |
95 | /* If non-empty, this is a search path for loading non-absolute shared library |
96 | symbol files. This takes precedence over the environment variables PATH | |
97 | and LD_LIBRARY_PATH. */ | |
98 | static char *solib_search_path = NULL; | |
920d2a44 AC |
99 | static void |
100 | show_solib_search_path (struct ui_file *file, int from_tty, | |
101 | struct cmd_list_element *c, const char *value) | |
102 | { | |
3e43a32a MS |
103 | fprintf_filtered (file, _("The search path for loading non-absolute " |
104 | "shared library symbol files is %s.\n"), | |
920d2a44 AC |
105 | value); |
106 | } | |
c906108c | 107 | |
ab38a727 PA |
108 | /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */ |
109 | #if (HAVE_DOS_BASED_FILE_SYSTEM) | |
110 | # define DOS_BASED_FILE_SYSTEM 1 | |
111 | #else | |
112 | # define DOS_BASED_FILE_SYSTEM 0 | |
113 | #endif | |
114 | ||
af1900b0 GB |
115 | /* Return the full pathname of a binary file (the main executable |
116 | or a shared library file), or NULL if not found. The returned | |
998d2a3e GB |
117 | pathname is malloc'ed and must be freed by the caller. If FD |
118 | is non-NULL, *FD is set to either -1 or an open file handle for | |
119 | the binary file. | |
e4f7b8c8 | 120 | |
f822c95b | 121 | Global variable GDB_SYSROOT is used as a prefix directory |
af1900b0 | 122 | to search for binary files if they have an absolute path. |
b57fbfba GB |
123 | If GDB_SYSROOT starts with "target:" and target filesystem |
124 | is the local filesystem then the "target:" prefix will be | |
125 | stripped before the search starts. This ensures that the | |
126 | same search algorithm is used for local files regardless of | |
127 | whether a "target:" prefix was used. | |
e4f7b8c8 MS |
128 | |
129 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
130 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
b57fbfba | 131 | shared libraries if not found in either the sysroot (if set) or |
af1900b0 GB |
132 | the local filesystem. SOLIB_SEARCH_PATH is not used when searching |
133 | for the main executable. | |
e4f7b8c8 | 134 | |
c8c18e65 | 135 | Search algorithm: |
b57fbfba GB |
136 | * If a sysroot is set and path is absolute: |
137 | * Search for sysroot/path. | |
c8c18e65 KW |
138 | * else |
139 | * Look for it literally (unmodified). | |
af1900b0 GB |
140 | * If IS_SOLIB is non-zero: |
141 | * Look in SOLIB_SEARCH_PATH. | |
142 | * If available, use target defined search function. | |
b57fbfba | 143 | * If NO sysroot is set, perform the following two searches: |
c8c18e65 | 144 | * Look in inferior's $PATH. |
af1900b0 GB |
145 | * If IS_SOLIB is non-zero: |
146 | * Look in inferior's $LD_LIBRARY_PATH. | |
ab38a727 | 147 | * |
c8c18e65 | 148 | * The last check avoids doing this search when targetting remote |
b57fbfba | 149 | * machines since a sysroot will almost always be set. |
7f86f058 | 150 | */ |
e4f7b8c8 | 151 | |
af1900b0 GB |
152 | static char * |
153 | solib_find_1 (char *in_pathname, int *fd, int is_solib) | |
e4f7b8c8 | 154 | { |
3641da11 | 155 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
e4f7b8c8 MS |
156 | int found_file = -1; |
157 | char *temp_pathname = NULL; | |
ab38a727 PA |
158 | const char *fskind = effective_target_file_system_kind (); |
159 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); | |
b57fbfba | 160 | char *sysroot = gdb_sysroot; |
f8773be1 | 161 | int prefix_len, orig_prefix_len; |
08105857 | 162 | |
a3be80c3 GB |
163 | /* If the absolute prefix starts with "target:" but the filesystem |
164 | accessed by the target_fileio_* methods is the local filesystem | |
165 | then we strip the "target:" prefix now and work with the local | |
166 | filesystem. This ensures that the same search algorithm is used | |
167 | for all local files regardless of whether a "target:" prefix was | |
168 | used. */ | |
169 | if (is_target_filename (sysroot) && target_filesystem_is_local ()) | |
170 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
171 | ||
f8773be1 GB |
172 | /* Strip any trailing slashes from the absolute prefix. */ |
173 | prefix_len = orig_prefix_len = strlen (sysroot); | |
f1d10cfb | 174 | |
f8773be1 GB |
175 | while (prefix_len > 0 && IS_DIR_SEPARATOR (sysroot[prefix_len - 1])) |
176 | prefix_len--; | |
f1d10cfb | 177 | |
f8773be1 GB |
178 | if (prefix_len == 0) |
179 | sysroot = NULL; | |
180 | else if (prefix_len != orig_prefix_len) | |
181 | { | |
b57fbfba | 182 | sysroot = savestring (sysroot, prefix_len); |
ab38a727 PA |
183 | make_cleanup (xfree, sysroot); |
184 | } | |
185 | ||
186 | /* If we're on a non-DOS-based system, backslashes won't be | |
187 | understood as directory separator, so, convert them to forward | |
188 | slashes, iff we're supposed to handle DOS-based file system | |
189 | semantics for target paths. */ | |
190 | if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based) | |
191 | { | |
192 | char *p; | |
193 | ||
194 | /* Avoid clobbering our input. */ | |
195 | p = alloca (strlen (in_pathname) + 1); | |
196 | strcpy (p, in_pathname); | |
197 | in_pathname = p; | |
198 | ||
199 | for (; *p; p++) | |
200 | { | |
201 | if (*p == '\\') | |
202 | *p = '/'; | |
203 | } | |
204 | } | |
205 | ||
206 | /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not | |
207 | IS_ABSOLUTE_PATH. The latter is for host paths only, while | |
208 | IN_PATHNAME is a target path. For example, if we're supposed to | |
209 | be handling DOS-like semantics we want to consider a | |
210 | 'c:/foo/bar.dll' path as an absolute path, even on a Unix box. | |
211 | With such a path, before giving up on the sysroot, we'll try: | |
212 | ||
213 | 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll | |
214 | 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll | |
215 | 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll | |
216 | */ | |
217 | ||
b57fbfba | 218 | if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL) |
ab38a727 PA |
219 | temp_pathname = xstrdup (in_pathname); |
220 | else | |
221 | { | |
222 | int need_dir_separator; | |
223 | ||
3736004f PA |
224 | /* Concatenate the sysroot and the target reported filename. We |
225 | may need to glue them with a directory separator. Cases to | |
226 | consider: | |
227 | ||
228 | | sysroot | separator | in_pathname | | |
229 | |-----------------+-----------+----------------| | |
230 | | /some/dir | / | c:/foo/bar.dll | | |
231 | | /some/dir | | /foo/bar.dll | | |
2938e6cf GB |
232 | | target: | | c:/foo/bar.dll | |
233 | | target: | | /foo/bar.dll | | |
234 | | target:some/dir | / | c:/foo/bar.dll | | |
235 | | target:some/dir | | /foo/bar.dll | | |
3736004f PA |
236 | |
237 | IOW, we don't need to add a separator if IN_PATHNAME already | |
2938e6cf | 238 | has one, or when the the sysroot is exactly "target:". |
3736004f PA |
239 | There's no need to check for drive spec explicitly, as we only |
240 | get here if IN_PATHNAME is considered an absolute path. */ | |
241 | need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0]) | |
2938e6cf | 242 | || strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0); |
ab38a727 | 243 | |
f1d10cfb | 244 | /* Cat the prefixed pathname together. */ |
ab38a727 PA |
245 | temp_pathname = concat (sysroot, |
246 | need_dir_separator ? SLASH_STRING : "", | |
247 | in_pathname, (char *) NULL); | |
e4f7b8c8 MS |
248 | } |
249 | ||
2938e6cf GB |
250 | /* Handle files to be accessed via the target. */ |
251 | if (is_target_filename (temp_pathname)) | |
f1838a98 | 252 | { |
998d2a3e GB |
253 | if (fd != NULL) |
254 | *fd = -1; | |
f748fb40 | 255 | do_cleanups (old_chain); |
ab38a727 | 256 | return temp_pathname; |
f1838a98 UW |
257 | } |
258 | ||
f1d10cfb | 259 | /* Now see if we can open it. */ |
614c279d | 260 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
261 | if (found_file < 0) |
262 | xfree (temp_pathname); | |
263 | ||
264 | /* If the search in gdb_sysroot failed, and the path name has a | |
265 | drive spec (e.g, c:/foo), try stripping ':' from the drive spec, | |
266 | and retrying in the sysroot: | |
267 | c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */ | |
f1d10cfb | 268 | |
ab38a727 | 269 | if (found_file < 0 |
b57fbfba | 270 | && sysroot != NULL |
ab38a727 PA |
271 | && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname)) |
272 | { | |
273 | int need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]); | |
274 | char *drive = savestring (in_pathname, 1); | |
275 | ||
276 | temp_pathname = concat (sysroot, | |
277 | SLASH_STRING, | |
278 | drive, | |
279 | need_dir_separator ? SLASH_STRING : "", | |
280 | in_pathname + 2, (char *) NULL); | |
281 | xfree (drive); | |
282 | ||
614c279d | 283 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
284 | if (found_file < 0) |
285 | { | |
ab38a727 PA |
286 | xfree (temp_pathname); |
287 | ||
288 | /* If the search in gdb_sysroot still failed, try fully | |
289 | stripping the drive spec, and trying once more in the | |
290 | sysroot before giving up. | |
291 | ||
292 | c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */ | |
293 | ||
294 | temp_pathname = concat (sysroot, | |
295 | need_dir_separator ? SLASH_STRING : "", | |
296 | in_pathname + 2, (char *) NULL); | |
297 | ||
614c279d | 298 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
299 | if (found_file < 0) |
300 | xfree (temp_pathname); | |
301 | } | |
302 | } | |
0997b535 | 303 | |
ab38a727 PA |
304 | do_cleanups (old_chain); |
305 | ||
306 | /* We try to find the library in various ways. After each attempt, | |
307 | either found_file >= 0 and temp_pathname is a malloc'd string, or | |
308 | found_file < 0 and temp_pathname does not point to storage that | |
309 | needs to be freed. */ | |
310 | ||
311 | if (found_file < 0) | |
312 | temp_pathname = NULL; | |
313 | ||
f822c95b | 314 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
315 | absolute at this point, make it relative. (openp will try and open the |
316 | file according to its absolute path otherwise, which is not what we want.) | |
317 | Affects subsequent searches for this solib. */ | |
ab38a727 | 318 | if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
ba5f0d88 OF |
319 | { |
320 | /* First, get rid of any drive letters etc. */ | |
ab38a727 PA |
321 | while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
322 | in_pathname++; | |
ba5f0d88 OF |
323 | |
324 | /* Next, get rid of all leading dir separators. */ | |
ab38a727 PA |
325 | while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
326 | in_pathname++; | |
ba5f0d88 | 327 | } |
ab38a727 | 328 | |
af1900b0 GB |
329 | /* If not found, and we're looking for a solib, search the |
330 | solib_search_path (if any). */ | |
331 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
332 | found_file = openp (solib_search_path, |
333 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
fbdebf46 | 334 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ab38a727 | 335 | |
af1900b0 GB |
336 | /* If not found, and we're looking for a solib, next search the |
337 | solib_search_path (if any) for the basename only (ignoring the | |
338 | path). This is to allow reading solibs from a path that differs | |
339 | from the opened path. */ | |
340 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
341 | found_file = openp (solib_search_path, |
342 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
ab38a727 PA |
343 | target_lbasename (fskind, in_pathname), |
344 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 345 | |
af1900b0 GB |
346 | /* If not found, and we're looking for a solib, try to use target |
347 | supplied solib search method. */ | |
348 | if (is_solib && found_file < 0 && ops->find_and_open_solib) | |
637d6690 | 349 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 350 | &temp_pathname); |
2610b0bf | 351 | |
c378eb4e | 352 | /* If not found, next search the inferior's $PATH environment variable. */ |
b57fbfba | 353 | if (found_file < 0 && sysroot == NULL) |
3f81c18a VP |
354 | found_file = openp (get_in_environ (current_inferior ()->environment, |
355 | "PATH"), | |
492c0ab7 JK |
356 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
357 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 358 | |
af1900b0 GB |
359 | /* If not found, and we're looking for a solib, next search the |
360 | inferior's $LD_LIBRARY_PATH environment variable. */ | |
361 | if (is_solib && found_file < 0 && sysroot == NULL) | |
3f81c18a VP |
362 | found_file = openp (get_in_environ (current_inferior ()->environment, |
363 | "LD_LIBRARY_PATH"), | |
492c0ab7 JK |
364 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
365 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 366 | |
998d2a3e GB |
367 | if (fd == NULL) |
368 | { | |
369 | if (found_file >= 0) | |
370 | close (found_file); | |
371 | } | |
372 | else | |
373 | *fd = found_file; | |
374 | ||
572d275c UW |
375 | return temp_pathname; |
376 | } | |
377 | ||
af1900b0 GB |
378 | /* Return the full pathname of the main executable, or NULL if not |
379 | found. The returned pathname is malloc'ed and must be freed by | |
998d2a3e GB |
380 | the caller. If FD is non-NULL, *FD is set to either -1 or an open |
381 | file handle for the main executable. | |
af1900b0 GB |
382 | |
383 | The search algorithm used is described in solib_find_1's comment | |
384 | above. */ | |
385 | ||
386 | char * | |
387 | exec_file_find (char *in_pathname, int *fd) | |
388 | { | |
389 | char *result = solib_find_1 (in_pathname, fd, 0); | |
390 | ||
391 | if (result == NULL) | |
392 | { | |
393 | const char *fskind = effective_target_file_system_kind (); | |
394 | ||
395 | if (fskind == file_system_kind_dos_based) | |
396 | { | |
397 | char *new_pathname; | |
398 | ||
399 | new_pathname = alloca (strlen (in_pathname) + 5); | |
400 | strcpy (new_pathname, in_pathname); | |
401 | strcat (new_pathname, ".exe"); | |
402 | ||
403 | result = solib_find_1 (new_pathname, fd, 0); | |
404 | } | |
405 | } | |
406 | ||
407 | return result; | |
408 | } | |
409 | ||
410 | /* Return the full pathname of a shared library file, or NULL if not | |
411 | found. The returned pathname is malloc'ed and must be freed by | |
998d2a3e GB |
412 | the caller. If FD is non-NULL, *FD is set to either -1 or an open |
413 | file handle for the shared library. | |
af1900b0 GB |
414 | |
415 | The search algorithm used is described in solib_find_1's comment | |
416 | above. */ | |
417 | ||
418 | char * | |
419 | solib_find (char *in_pathname, int *fd) | |
420 | { | |
421 | const char *solib_symbols_extension | |
422 | = gdbarch_solib_symbols_extension (target_gdbarch ()); | |
423 | ||
424 | /* If solib_symbols_extension is set, replace the file's | |
425 | extension. */ | |
426 | if (solib_symbols_extension != NULL) | |
427 | { | |
428 | char *p = in_pathname + strlen (in_pathname); | |
429 | ||
430 | while (p > in_pathname && *p != '.') | |
431 | p--; | |
432 | ||
433 | if (*p == '.') | |
434 | { | |
435 | char *new_pathname; | |
436 | ||
437 | new_pathname = alloca (p - in_pathname + 1 | |
438 | + strlen (solib_symbols_extension) + 1); | |
439 | memcpy (new_pathname, in_pathname, p - in_pathname + 1); | |
440 | strcpy (new_pathname + (p - in_pathname) + 1, | |
441 | solib_symbols_extension); | |
442 | ||
443 | in_pathname = new_pathname; | |
444 | } | |
445 | } | |
446 | ||
447 | return solib_find_1 (in_pathname, fd, 1); | |
448 | } | |
449 | ||
572d275c UW |
450 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, |
451 | it is used as file handle to open the file. Throws an error if the file | |
452 | could not be opened. Handles both local and remote file access. | |
453 | ||
a4453b7e TT |
454 | PATHNAME must be malloc'ed by the caller. It will be freed by this |
455 | function. If unsuccessful, the FD will be closed (unless FD was | |
456 | -1). */ | |
572d275c UW |
457 | |
458 | bfd * | |
459 | solib_bfd_fopen (char *pathname, int fd) | |
460 | { | |
2938e6cf | 461 | bfd *abfd = gdb_bfd_open (pathname, gnutarget, fd); |
572d275c | 462 | |
2938e6cf GB |
463 | if (abfd != NULL && !gdb_bfd_has_target_filename (abfd)) |
464 | bfd_set_cacheable (abfd, 1); | |
f1838a98 | 465 | |
f1838a98 UW |
466 | if (!abfd) |
467 | { | |
572d275c | 468 | make_cleanup (xfree, pathname); |
f1838a98 | 469 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 470 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
471 | } |
472 | ||
a4453b7e TT |
473 | xfree (pathname); |
474 | ||
520b0001 | 475 | return abfd; |
572d275c UW |
476 | } |
477 | ||
478 | /* Find shared library PATHNAME and open a BFD for it. */ | |
479 | ||
480 | bfd * | |
481 | solib_bfd_open (char *pathname) | |
482 | { | |
572d275c UW |
483 | char *found_pathname; |
484 | int found_file; | |
485 | bfd *abfd; | |
378d2b72 | 486 | const struct bfd_arch_info *b; |
572d275c | 487 | |
572d275c UW |
488 | /* Search for shared library file. */ |
489 | found_pathname = solib_find (pathname, &found_file); | |
490 | if (found_pathname == NULL) | |
048d532d PA |
491 | { |
492 | /* Return failure if the file could not be found, so that we can | |
493 | accumulate messages about missing libraries. */ | |
494 | if (errno == ENOENT) | |
495 | return NULL; | |
496 | ||
497 | perror_with_name (pathname); | |
498 | } | |
572d275c UW |
499 | |
500 | /* Open bfd for shared library. */ | |
501 | abfd = solib_bfd_fopen (found_pathname, found_file); | |
502 | ||
503 | /* Check bfd format. */ | |
f1838a98 | 504 | if (!bfd_check_format (abfd, bfd_object)) |
0997b535 | 505 | { |
f9a062ff | 506 | make_cleanup_bfd_unref (abfd); |
f1838a98 | 507 | error (_("`%s': not in executable format: %s"), |
a4453b7e | 508 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
0997b535 | 509 | } |
f1838a98 | 510 | |
378d2b72 | 511 | /* Check bfd arch. */ |
f5656ead | 512 | b = gdbarch_bfd_arch_info (target_gdbarch ()); |
69e2bf17 | 513 | if (!b->compatible (b, bfd_get_arch_info (abfd))) |
378d2b72 | 514 | warning (_("`%s': Shared library architecture %s is not compatible " |
a4453b7e | 515 | "with target architecture %s."), bfd_get_filename (abfd), |
378d2b72 HZ |
516 | bfd_get_arch_info (abfd)->printable_name, b->printable_name); |
517 | ||
f1838a98 | 518 | return abfd; |
e4f7b8c8 MS |
519 | } |
520 | ||
ca5268b6 JK |
521 | /* Boolean for command 'set validate-build-id'. */ |
522 | static int validate_build_id = 1; | |
523 | ||
524 | /* Implement 'show validate-build-id'. */ | |
525 | ||
526 | static void | |
527 | show_validate_build_id (struct ui_file *file, int from_tty, | |
528 | struct cmd_list_element *c, const char *value) | |
529 | { | |
530 | fprintf_filtered (file, _("Validation a build-id matches to load a shared " | |
531 | "library is %s.\n"), | |
532 | value); | |
533 | } | |
534 | ||
7f86f058 PA |
535 | /* Given a pointer to one of the shared objects in our list of mapped |
536 | objects, use the recorded name to open a bfd descriptor for the | |
537 | object, build a section table, relocate all the section addresses | |
538 | by the base address at which the shared object was mapped, and then | |
539 | add the sections to the target's section table. | |
e4f7b8c8 | 540 | |
7f86f058 PA |
541 | FIXME: In most (all?) cases the shared object file name recorded in |
542 | the dynamic linkage tables will be a fully qualified pathname. For | |
c5aa993b JM |
543 | cases where it isn't, do we really mimic the systems search |
544 | mechanism correctly in the below code (particularly the tilde | |
7f86f058 | 545 | expansion stuff?). */ |
c906108c SS |
546 | |
547 | static int | |
048d532d | 548 | solib_map_sections (struct so_list *so) |
c906108c | 549 | { |
3641da11 | 550 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
ca5268b6 | 551 | char *filename, *validate_error; |
0542c86d | 552 | struct target_section *p; |
c906108c SS |
553 | struct cleanup *old_chain; |
554 | bfd *abfd; | |
c5aa993b JM |
555 | |
556 | filename = tilde_expand (so->so_name); | |
b8c9b27d | 557 | old_chain = make_cleanup (xfree, filename); |
831a0c44 | 558 | abfd = ops->bfd_open (filename); |
f1838a98 | 559 | do_cleanups (old_chain); |
e4f7b8c8 | 560 | |
048d532d PA |
561 | if (abfd == NULL) |
562 | return 0; | |
563 | ||
13437d4b | 564 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
cbb099e8 | 565 | so->abfd = abfd; |
23e04971 | 566 | |
ca5268b6 JK |
567 | gdb_assert (ops->validate != NULL); |
568 | ||
569 | validate_error = ops->validate (so); | |
570 | if (validate_error != NULL) | |
571 | { | |
572 | if (validate_build_id) | |
573 | { | |
574 | warning (_("Shared object \"%s\" could not be validated (%s) and " | |
575 | "will be ignored; " | |
576 | "or use 'set validate-build-id off'."), | |
577 | so->so_name, validate_error); | |
578 | xfree (validate_error); | |
579 | gdb_bfd_unref (so->abfd); | |
580 | so->abfd = NULL; | |
581 | return 0; | |
582 | } | |
583 | warning (_("Shared object \"%s\" could not be validated (%s) " | |
584 | "but it is being loaded due to " | |
585 | "'set validate-build-id off'."), | |
586 | so->so_name, validate_error); | |
587 | xfree (validate_error); | |
588 | } | |
589 | ||
b030cf11 JB |
590 | /* Copy the full path name into so_name, allowing symbol_file_add |
591 | to find it later. This also affects the =library-loaded GDB/MI | |
592 | event, and in particular the part of that notification providing | |
593 | the library's host-side path. If we let the target dictate | |
594 | that objfile's path, and the target is different from the host, | |
595 | GDB/MI will not provide the correct host-side path. */ | |
596 | if (strlen (bfd_get_filename (abfd)) >= SO_NAME_MAX_PATH_SIZE) | |
597 | error (_("Shared library file name is too long.")); | |
598 | strcpy (so->so_name, bfd_get_filename (abfd)); | |
599 | ||
13437d4b | 600 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
23e04971 | 601 | { |
8a3fe4f8 | 602 | error (_("Can't find the file sections in `%s': %s"), |
13437d4b | 603 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
23e04971 | 604 | } |
104c1213 | 605 | |
13437d4b | 606 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 607 | { |
13437d4b KB |
608 | /* Relocate the section binding addresses as recorded in the shared |
609 | object's file by the base address to which the object was actually | |
c378eb4e | 610 | mapped. */ |
66aba65d | 611 | ops->relocate_section_addresses (so, p); |
cfa9d6d9 DJ |
612 | |
613 | /* If the target didn't provide information about the address | |
614 | range of the shared object, assume we want the location of | |
615 | the .text section. */ | |
616 | if (so->addr_low == 0 && so->addr_high == 0 | |
617 | && strcmp (p->the_bfd_section->name, ".text") == 0) | |
13437d4b | 618 | { |
cfa9d6d9 DJ |
619 | so->addr_low = p->addr; |
620 | so->addr_high = p->endaddr; | |
13437d4b | 621 | } |
104c1213 JM |
622 | } |
623 | ||
048d532d PA |
624 | /* Add the shared object's sections to the current set of file |
625 | section tables. Do this immediately after mapping the object so | |
626 | that later nodes in the list can query this object, as is needed | |
627 | in solib-osf.c. */ | |
ed9eebaf | 628 | add_target_sections (so, so->sections, so->sections_end); |
048d532d PA |
629 | |
630 | return 1; | |
104c1213 | 631 | } |
c906108c | 632 | |
0892cb63 DE |
633 | /* Free symbol-file related contents of SO and reset for possible reloading |
634 | of SO. If we have opened a BFD for SO, close it. If we have placed SO's | |
635 | sections in some target's section table, the caller is responsible for | |
636 | removing them. | |
a86988f2 PA |
637 | |
638 | This function doesn't mess with objfiles at all. If there is an | |
639 | objfile associated with SO that needs to be removed, the caller is | |
640 | responsible for taking care of that. */ | |
641 | ||
642 | static void | |
0892cb63 | 643 | clear_so (struct so_list *so) |
a86988f2 | 644 | { |
3641da11 | 645 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
0892cb63 | 646 | |
a86988f2 PA |
647 | if (so->sections) |
648 | { | |
649 | xfree (so->sections); | |
650 | so->sections = so->sections_end = NULL; | |
651 | } | |
652 | ||
653 | gdb_bfd_unref (so->abfd); | |
654 | so->abfd = NULL; | |
655 | ||
656 | /* Our caller closed the objfile, possibly via objfile_purge_solibs. */ | |
657 | so->symbols_loaded = 0; | |
658 | so->objfile = NULL; | |
659 | ||
660 | so->addr_low = so->addr_high = 0; | |
661 | ||
662 | /* Restore the target-supplied file name. SO_NAME may be the path | |
663 | of the symbol file. */ | |
664 | strcpy (so->so_name, so->so_original_name); | |
0892cb63 | 665 | |
ca5268b6 JK |
666 | xfree (so->build_id); |
667 | so->build_id = NULL; | |
668 | ||
0892cb63 DE |
669 | /* Do the same for target-specific data. */ |
670 | if (ops->clear_so != NULL) | |
671 | ops->clear_so (so); | |
a86988f2 PA |
672 | } |
673 | ||
7f86f058 | 674 | /* Free the storage associated with the `struct so_list' object SO. |
c378eb4e | 675 | If we have opened a BFD for SO, close it. |
c906108c | 676 | |
07cd4b97 JB |
677 | The caller is responsible for removing SO from whatever list it is |
678 | a member of. If we have placed SO's sections in some target's | |
679 | section table, the caller is responsible for removing them. | |
c906108c | 680 | |
07cd4b97 JB |
681 | This function doesn't mess with objfiles at all. If there is an |
682 | objfile associated with SO that needs to be removed, the caller is | |
683 | responsible for taking care of that. */ | |
684 | ||
13437d4b | 685 | void |
07cd4b97 | 686 | free_so (struct so_list *so) |
c906108c | 687 | { |
3641da11 | 688 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c5aa993b | 689 | |
0892cb63 | 690 | clear_so (so); |
66aba65d | 691 | ops->free_so (so); |
07cd4b97 | 692 | |
b8c9b27d | 693 | xfree (so); |
c906108c SS |
694 | } |
695 | ||
07cd4b97 | 696 | |
f8766ec1 KB |
697 | /* Return address of first so_list entry in master shared object list. */ |
698 | struct so_list * | |
699 | master_so_list (void) | |
700 | { | |
701 | return so_list_head; | |
702 | } | |
703 | ||
7eedccfa PP |
704 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
705 | be chatty about it. Return non-zero if any symbols were actually | |
42a6e6a0 MK |
706 | loaded. */ |
707 | ||
708 | int | |
7eedccfa | 709 | solib_read_symbols (struct so_list *so, int flags) |
42a6e6a0 MK |
710 | { |
711 | if (so->symbols_loaded) | |
712 | { | |
a86988f2 | 713 | /* If needed, we've already warned in our caller. */ |
42a6e6a0 | 714 | } |
8bb75286 DJ |
715 | else if (so->abfd == NULL) |
716 | { | |
048d532d PA |
717 | /* We've already warned about this library, when trying to open |
718 | it. */ | |
8bb75286 | 719 | } |
42a6e6a0 MK |
720 | else |
721 | { | |
048d532d | 722 | |
7dcd53a0 TT |
723 | flags |= current_inferior ()->symfile_flags; |
724 | ||
492d29ea | 725 | TRY |
048d532d PA |
726 | { |
727 | struct section_addr_info *sap; | |
728 | ||
729 | /* Have we already loaded this shared object? */ | |
730 | ALL_OBJFILES (so->objfile) | |
731 | { | |
4262abfb | 732 | if (filename_cmp (objfile_name (so->objfile), so->so_name) == 0 |
e4f6d2ec | 733 | && so->objfile->addr_low == so->addr_low) |
048d532d PA |
734 | break; |
735 | } | |
736 | if (so->objfile != NULL) | |
737 | break; | |
738 | ||
739 | sap = build_section_addr_info_from_section_table (so->sections, | |
740 | so->sections_end); | |
24ba069a | 741 | so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name, |
63524580 JK |
742 | flags, sap, OBJF_SHARED, |
743 | NULL); | |
e4f6d2ec | 744 | so->objfile->addr_low = so->addr_low; |
048d532d | 745 | free_section_addr_info (sap); |
492d29ea PA |
746 | |
747 | so->symbols_loaded = 1; | |
748 | } | |
749 | CATCH (e, RETURN_MASK_ERROR) | |
750 | { | |
751 | exception_fprintf (gdb_stderr, e, _("Error while reading shared" | |
752 | " library symbols for %s:\n"), | |
753 | so->so_name); | |
048d532d | 754 | } |
492d29ea | 755 | END_CATCH |
048d532d | 756 | |
7eedccfa | 757 | return 1; |
42a6e6a0 MK |
758 | } |
759 | ||
760 | return 0; | |
761 | } | |
c906108c | 762 | |
59145f8c AR |
763 | /* Return 1 if KNOWN->objfile is used by any other so_list object in the |
764 | SO_LIST_HEAD list. Return 0 otherwise. */ | |
765 | ||
766 | static int | |
767 | solib_used (const struct so_list *const known) | |
768 | { | |
769 | const struct so_list *pivot; | |
770 | ||
771 | for (pivot = so_list_head; pivot != NULL; pivot = pivot->next) | |
772 | if (pivot != known && pivot->objfile == known->objfile) | |
773 | return 1; | |
774 | return 0; | |
775 | } | |
776 | ||
7f86f058 | 777 | /* Synchronize GDB's shared object list with inferior's. |
c906108c | 778 | |
07cd4b97 | 779 | Extract the list of currently loaded shared objects from the |
105b175f JB |
780 | inferior, and compare it with the list of shared objects currently |
781 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
782 | with the inferior's new list. | |
c906108c | 783 | |
105b175f JB |
784 | If we notice that the inferior has unloaded some shared objects, |
785 | free any symbolic info GDB had read about those shared objects. | |
786 | ||
787 | Don't load symbolic info for any new shared objects; just add them | |
788 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
789 | |
790 | If FROM_TTY is non-null, feel free to print messages about what | |
791 | we're doing. | |
c906108c | 792 | |
07cd4b97 JB |
793 | If TARGET is non-null, add the sections of all new shared objects |
794 | to TARGET's section table. Note that this doesn't remove any | |
795 | sections for shared objects that have been unloaded, and it | |
796 | doesn't check to see if the new shared objects are already present in | |
797 | the section table. But we only use this for core files and | |
798 | processes we've just attached to, so that's okay. */ | |
c906108c | 799 | |
a78f21af | 800 | static void |
105b175f | 801 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 | 802 | { |
3641da11 | 803 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 804 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
805 | struct so_list *gdb, **gdb_link; |
806 | ||
181e7f93 PA |
807 | /* We can reach here due to changing solib-search-path or the |
808 | sysroot, before having any inferior. */ | |
50c71eaf | 809 | if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid)) |
181e7f93 PA |
810 | { |
811 | struct inferior *inf = current_inferior (); | |
812 | ||
813 | /* If we are attaching to a running process for which we | |
814 | have not opened a symbol file, we may be able to get its | |
815 | symbols now! */ | |
816 | if (inf->attach_flag && symfile_objfile == NULL) | |
817 | catch_errors (ops->open_symbol_file_object, &from_tty, | |
818 | "Error reading attached process's symbol file.\n", | |
819 | RETURN_MASK_ALL); | |
820 | } | |
104c1213 | 821 | |
07cd4b97 JB |
822 | /* GDB and the inferior's dynamic linker each maintain their own |
823 | list of currently loaded shared objects; we want to bring the | |
824 | former in sync with the latter. Scan both lists, seeing which | |
825 | shared objects appear where. There are three cases: | |
826 | ||
827 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
828 | knows about it already, and it's still loaded in the inferior. |
829 | Nothing needs to happen. | |
07cd4b97 JB |
830 | |
831 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
832 | the inferior has unloaded it. We should remove the shared |
833 | object from GDB's tables. | |
07cd4b97 JB |
834 | |
835 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
836 | means that it's just been loaded. We should add it to GDB's |
837 | tables. | |
07cd4b97 JB |
838 | |
839 | So we walk GDB's list, checking each entry to see if it appears | |
840 | in the inferior's list too. If it does, no action is needed, and | |
841 | we remove it from the inferior's list. If it doesn't, the | |
842 | inferior has unloaded it, and we remove it from GDB's list. By | |
843 | the time we're done walking GDB's list, the inferior's list | |
844 | contains only the new shared objects, which we then add. */ | |
845 | ||
846 | gdb = so_list_head; | |
847 | gdb_link = &so_list_head; | |
848 | while (gdb) | |
c906108c | 849 | { |
07cd4b97 JB |
850 | struct so_list *i = inferior; |
851 | struct so_list **i_link = &inferior; | |
852 | ||
853 | /* Check to see whether the shared object *gdb also appears in | |
854 | the inferior's current list. */ | |
855 | while (i) | |
c906108c | 856 | { |
a7c02bc8 VP |
857 | if (ops->same) |
858 | { | |
859 | if (ops->same (gdb, i)) | |
860 | break; | |
861 | } | |
862 | else | |
863 | { | |
0ba1096a | 864 | if (! filename_cmp (gdb->so_original_name, i->so_original_name)) |
a7c02bc8 VP |
865 | break; |
866 | } | |
07cd4b97 JB |
867 | |
868 | i_link = &i->next; | |
869 | i = *i_link; | |
c906108c | 870 | } |
c5aa993b | 871 | |
07cd4b97 JB |
872 | /* If the shared object appears on the inferior's list too, then |
873 | it's still loaded, so we don't need to do anything. Delete | |
874 | it from the inferior's list, and leave it on GDB's list. */ | |
875 | if (i) | |
c906108c | 876 | { |
07cd4b97 | 877 | *i_link = i->next; |
07cd4b97 JB |
878 | free_so (i); |
879 | gdb_link = &gdb->next; | |
880 | gdb = *gdb_link; | |
881 | } | |
882 | ||
883 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
884 | else | |
885 | { | |
42a6e6a0 MK |
886 | /* Notify any observer that the shared object has been |
887 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
888 | observer_notify_solib_unloaded (gdb); |
889 | ||
edcc5120 TT |
890 | VEC_safe_push (char_ptr, current_program_space->deleted_solibs, |
891 | xstrdup (gdb->so_name)); | |
892 | ||
07cd4b97 | 893 | *gdb_link = gdb->next; |
07cd4b97 JB |
894 | |
895 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
59145f8c AR |
896 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED) |
897 | && !solib_used (gdb)) | |
07cd4b97 JB |
898 | free_objfile (gdb->objfile); |
899 | ||
900 | /* Some targets' section tables might be referring to | |
901 | sections from so->abfd; remove them. */ | |
046ac79f | 902 | remove_target_sections (gdb); |
07cd4b97 JB |
903 | |
904 | free_so (gdb); | |
905 | gdb = *gdb_link; | |
c906108c SS |
906 | } |
907 | } | |
c5aa993b | 908 | |
07cd4b97 JB |
909 | /* Now the inferior's list contains only shared objects that don't |
910 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 911 | to GDB's shared object list. */ |
07cd4b97 | 912 | if (inferior) |
c906108c | 913 | { |
048d532d PA |
914 | int not_found = 0; |
915 | const char *not_found_filename = NULL; | |
916 | ||
07cd4b97 JB |
917 | struct so_list *i; |
918 | ||
919 | /* Add the new shared objects to GDB's list. */ | |
920 | *gdb_link = inferior; | |
921 | ||
e8930304 | 922 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 923 | for (i = inferior; i; i = i->next) |
c906108c | 924 | { |
048d532d | 925 | |
6c95b8df | 926 | i->pspace = current_program_space; |
edcc5120 | 927 | VEC_safe_push (so_list_ptr, current_program_space->added_solibs, i); |
07cd4b97 | 928 | |
492d29ea | 929 | TRY |
048d532d PA |
930 | { |
931 | /* Fill in the rest of the `struct so_list' node. */ | |
932 | if (!solib_map_sections (i)) | |
933 | { | |
934 | not_found++; | |
935 | if (not_found_filename == NULL) | |
936 | not_found_filename = i->so_original_name; | |
937 | } | |
938 | } | |
07cd4b97 | 939 | |
492d29ea PA |
940 | CATCH (e, RETURN_MASK_ERROR) |
941 | { | |
942 | exception_fprintf (gdb_stderr, e, | |
943 | _("Error while mapping shared " | |
944 | "library sections:\n")); | |
945 | } | |
946 | END_CATCH | |
42a6e6a0 MK |
947 | |
948 | /* Notify any observer that the shared object has been | |
048d532d | 949 | loaded now that we've added it to GDB's tables. */ |
42a6e6a0 | 950 | observer_notify_solib_loaded (i); |
c906108c | 951 | } |
048d532d PA |
952 | |
953 | /* If a library was not found, issue an appropriate warning | |
954 | message. We have to use a single call to warning in case the | |
955 | front end does something special with warnings, e.g., pop up | |
956 | a dialog box. It Would Be Nice if we could get a "warning: " | |
957 | prefix on each line in the CLI front end, though - it doesn't | |
958 | stand out well. */ | |
959 | ||
960 | if (not_found == 1) | |
3e43a32a MS |
961 | warning (_("Could not load shared library symbols for %s.\n" |
962 | "Do you need \"set solib-search-path\" " | |
963 | "or \"set sysroot\"?"), | |
048d532d PA |
964 | not_found_filename); |
965 | else if (not_found > 1) | |
966 | warning (_("\ | |
967 | Could not load shared library symbols for %d libraries, e.g. %s.\n\ | |
968 | Use the \"info sharedlibrary\" command to see the complete listing.\n\ | |
969 | Do you need \"set solib-search-path\" or \"set sysroot\"?"), | |
970 | not_found, not_found_filename); | |
e8930304 | 971 | } |
105b175f JB |
972 | } |
973 | ||
17a37d48 PP |
974 | |
975 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
976 | |
977 | Uses a fairly simplistic heuristic approach where we check | |
978 | the file name against "/libpthread". This can lead to false | |
979 | positives, but this should be good enough in practice. */ | |
980 | ||
17a37d48 PP |
981 | int |
982 | libpthread_name_p (const char *name) | |
983 | { | |
984 | return (strstr (name, "/libpthread") != NULL); | |
985 | } | |
986 | ||
987 | /* Return non-zero if SO is the libpthread shared library. */ | |
988 | ||
6612ad7f JB |
989 | static int |
990 | libpthread_solib_p (struct so_list *so) | |
991 | { | |
17a37d48 | 992 | return libpthread_name_p (so->so_name); |
6612ad7f | 993 | } |
105b175f | 994 | |
7f86f058 | 995 | /* Read in symbolic information for any shared objects whose names |
105b175f JB |
996 | match PATTERN. (If we've already read a shared object's symbol |
997 | info, leave it alone.) If PATTERN is zero, read them all. | |
998 | ||
990f9fe3 FF |
999 | If READSYMS is 0, defer reading symbolic information until later |
1000 | but still do any needed low level processing. | |
1001 | ||
105b175f JB |
1002 | FROM_TTY and TARGET are as described for update_solib_list, above. */ |
1003 | ||
1004 | void | |
414842dc | 1005 | solib_add (const char *pattern, int from_tty, |
3e43a32a | 1006 | struct target_ops *target, int readsyms) |
105b175f JB |
1007 | { |
1008 | struct so_list *gdb; | |
1009 | ||
770e7fc7 DE |
1010 | if (print_symbol_loading_p (from_tty, 0, 0)) |
1011 | { | |
1012 | if (pattern != NULL) | |
1013 | { | |
1014 | printf_unfiltered (_("Loading symbols for shared libraries: %s\n"), | |
1015 | pattern); | |
1016 | } | |
1017 | else | |
1018 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
1019 | } | |
1020 | ||
2eff07b3 PP |
1021 | current_program_space->solib_add_generation++; |
1022 | ||
105b175f JB |
1023 | if (pattern) |
1024 | { | |
1025 | char *re_err = re_comp (pattern); | |
1026 | ||
1027 | if (re_err) | |
8a3fe4f8 | 1028 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
1029 | } |
1030 | ||
1031 | update_solib_list (from_tty, target); | |
c906108c | 1032 | |
105b175f JB |
1033 | /* Walk the list of currently loaded shared libraries, and read |
1034 | symbols for any that match the pattern --- or any whose symbols | |
1035 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
1036 | { |
1037 | int any_matches = 0; | |
1038 | int loaded_any_symbols = 0; | |
7eedccfa PP |
1039 | const int flags = |
1040 | SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0); | |
c906108c | 1041 | |
e8930304 JB |
1042 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
1043 | if (! pattern || re_exec (gdb->so_name)) | |
1044 | { | |
6612ad7f JB |
1045 | /* Normally, we would read the symbols from that library |
1046 | only if READSYMS is set. However, we're making a small | |
1047 | exception for the pthread library, because we sometimes | |
1048 | need the library symbols to be loaded in order to provide | |
1049 | thread support (x86-linux for instance). */ | |
1050 | const int add_this_solib = | |
1051 | (readsyms || libpthread_solib_p (gdb)); | |
1052 | ||
e8930304 | 1053 | any_matches = 1; |
a86988f2 PA |
1054 | if (add_this_solib) |
1055 | { | |
1056 | if (gdb->symbols_loaded) | |
1057 | { | |
1058 | /* If no pattern was given, be quiet for shared | |
1059 | libraries we have already loaded. */ | |
1060 | if (pattern && (from_tty || info_verbose)) | |
1061 | printf_unfiltered (_("Symbols already loaded for %s\n"), | |
1062 | gdb->so_name); | |
1063 | } | |
1064 | else if (solib_read_symbols (gdb, flags)) | |
1065 | loaded_any_symbols = 1; | |
1066 | } | |
e8930304 JB |
1067 | } |
1068 | ||
7eedccfa PP |
1069 | if (loaded_any_symbols) |
1070 | breakpoint_re_set (); | |
1071 | ||
e8930304 JB |
1072 | if (from_tty && pattern && ! any_matches) |
1073 | printf_unfiltered | |
1074 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
1075 | ||
1076 | if (loaded_any_symbols) | |
1077 | { | |
3641da11 | 1078 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 1079 | |
e8930304 JB |
1080 | /* Getting new symbols may change our opinion about what is |
1081 | frameless. */ | |
1082 | reinit_frame_cache (); | |
1083 | ||
66aba65d | 1084 | ops->special_symbol_handling (); |
e8930304 JB |
1085 | } |
1086 | } | |
c906108c SS |
1087 | } |
1088 | ||
7f86f058 PA |
1089 | /* Implement the "info sharedlibrary" command. Walk through the |
1090 | shared library list and print information about each attached | |
1091 | library matching PATTERN. If PATTERN is elided, print them | |
1092 | all. */ | |
c906108c SS |
1093 | |
1094 | static void | |
55333a84 | 1095 | info_sharedlibrary_command (char *pattern, int from_tty) |
c906108c | 1096 | { |
52f0bd74 | 1097 | struct so_list *so = NULL; /* link map state variable */ |
55333a84 | 1098 | int so_missing_debug_info = 0; |
c906108c | 1099 | int addr_width; |
55333a84 DE |
1100 | int nr_libs; |
1101 | struct cleanup *table_cleanup; | |
f5656ead | 1102 | struct gdbarch *gdbarch = target_gdbarch (); |
79a45e25 | 1103 | struct ui_out *uiout = current_uiout; |
55333a84 DE |
1104 | |
1105 | if (pattern) | |
1106 | { | |
1107 | char *re_err = re_comp (pattern); | |
1108 | ||
1109 | if (re_err) | |
1110 | error (_("Invalid regexp: %s"), re_err); | |
1111 | } | |
c906108c | 1112 | |
84eb3c4f | 1113 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
55333a84 | 1114 | addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4); |
c906108c | 1115 | |
105b175f | 1116 | update_solib_list (from_tty, 0); |
07cd4b97 | 1117 | |
55333a84 DE |
1118 | /* make_cleanup_ui_out_table_begin_end needs to know the number of |
1119 | rows, so we need to make two passes over the libs. */ | |
1120 | ||
1121 | for (nr_libs = 0, so = so_list_head; so; so = so->next) | |
c906108c | 1122 | { |
c5aa993b | 1123 | if (so->so_name[0]) |
c906108c | 1124 | { |
55333a84 DE |
1125 | if (pattern && ! re_exec (so->so_name)) |
1126 | continue; | |
1127 | ++nr_libs; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | table_cleanup = | |
1132 | make_cleanup_ui_out_table_begin_end (uiout, 4, nr_libs, | |
1133 | "SharedLibraryTable"); | |
1134 | ||
1135 | /* The "- 1" is because ui_out adds one space between columns. */ | |
1136 | ui_out_table_header (uiout, addr_width - 1, ui_left, "from", "From"); | |
1137 | ui_out_table_header (uiout, addr_width - 1, ui_left, "to", "To"); | |
1138 | ui_out_table_header (uiout, 12 - 1, ui_left, "syms-read", "Syms Read"); | |
1139 | ui_out_table_header (uiout, 0, ui_noalign, | |
1140 | "name", "Shared Object Library"); | |
1141 | ||
1142 | ui_out_table_body (uiout); | |
1143 | ||
1144 | for (so = so_list_head; so; so = so->next) | |
1145 | { | |
1146 | struct cleanup *lib_cleanup; | |
c906108c | 1147 | |
55333a84 DE |
1148 | if (! so->so_name[0]) |
1149 | continue; | |
1150 | if (pattern && ! re_exec (so->so_name)) | |
1151 | continue; | |
1152 | ||
1153 | lib_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "lib"); | |
1154 | ||
1155 | if (so->addr_high != 0) | |
1156 | { | |
1157 | ui_out_field_core_addr (uiout, "from", gdbarch, so->addr_low); | |
1158 | ui_out_field_core_addr (uiout, "to", gdbarch, so->addr_high); | |
1159 | } | |
1160 | else | |
1161 | { | |
1162 | ui_out_field_skip (uiout, "from"); | |
1163 | ui_out_field_skip (uiout, "to"); | |
c906108c | 1164 | } |
55333a84 DE |
1165 | |
1166 | if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())) | |
1167 | && so->symbols_loaded | |
e0ae4240 | 1168 | && !objfile_has_symbols (so->objfile)) |
55333a84 DE |
1169 | { |
1170 | so_missing_debug_info = 1; | |
1171 | ui_out_field_string (uiout, "syms-read", "Yes (*)"); | |
1172 | } | |
1173 | else | |
1174 | ui_out_field_string (uiout, "syms-read", | |
1175 | so->symbols_loaded ? "Yes" : "No"); | |
1176 | ||
1177 | ui_out_field_string (uiout, "name", so->so_name); | |
1178 | ||
1179 | ui_out_text (uiout, "\n"); | |
1180 | ||
1181 | do_cleanups (lib_cleanup); | |
c906108c | 1182 | } |
55333a84 DE |
1183 | |
1184 | do_cleanups (table_cleanup); | |
1185 | ||
1186 | if (nr_libs == 0) | |
1187 | { | |
1188 | if (pattern) | |
1189 | ui_out_message (uiout, 0, | |
1190 | _("No shared libraries matched.\n")); | |
1191 | else | |
1192 | ui_out_message (uiout, 0, | |
1193 | _("No shared libraries loaded at this time.\n")); | |
1194 | } | |
1195 | else | |
c906108c | 1196 | { |
55333a84 DE |
1197 | if (so_missing_debug_info) |
1198 | ui_out_message (uiout, 0, | |
3e43a32a MS |
1199 | _("(*): Shared library is missing " |
1200 | "debugging information.\n")); | |
c906108c SS |
1201 | } |
1202 | } | |
1203 | ||
5fd1a349 PP |
1204 | /* Return 1 if ADDRESS lies within SOLIB. */ |
1205 | ||
1206 | int | |
1207 | solib_contains_address_p (const struct so_list *const solib, | |
1208 | CORE_ADDR address) | |
1209 | { | |
0542c86d | 1210 | struct target_section *p; |
5fd1a349 PP |
1211 | |
1212 | for (p = solib->sections; p < solib->sections_end; p++) | |
1213 | if (p->addr <= address && address < p->endaddr) | |
1214 | return 1; | |
1215 | ||
1216 | return 0; | |
1217 | } | |
1218 | ||
7f86f058 PA |
1219 | /* If ADDRESS is in a shared lib in program space PSPACE, return its |
1220 | name. | |
c906108c | 1221 | |
7f86f058 PA |
1222 | Provides a hook for other gdb routines to discover whether or not a |
1223 | particular address is within the mapped address space of a shared | |
1224 | library. | |
c906108c | 1225 | |
c5aa993b JM |
1226 | For example, this routine is called at one point to disable |
1227 | breakpoints which are in shared libraries that are not currently | |
7f86f058 | 1228 | mapped in. */ |
c906108c SS |
1229 | |
1230 | char * | |
6c95b8df | 1231 | solib_name_from_address (struct program_space *pspace, CORE_ADDR address) |
c906108c | 1232 | { |
6c95b8df | 1233 | struct so_list *so = NULL; |
c5aa993b | 1234 | |
6c95b8df | 1235 | for (so = pspace->so_list; so; so = so->next) |
5fd1a349 PP |
1236 | if (solib_contains_address_p (so, address)) |
1237 | return (so->so_name); | |
07cd4b97 | 1238 | |
c906108c SS |
1239 | return (0); |
1240 | } | |
1241 | ||
de18c1d8 JM |
1242 | /* Return whether the data starting at VADDR, size SIZE, must be kept |
1243 | in a core file for shared libraries loaded before "gcore" is used | |
1244 | to be handled correctly when the core file is loaded. This only | |
1245 | applies when the section would otherwise not be kept in the core | |
1246 | file (in particular, for readonly sections). */ | |
1247 | ||
1248 | int | |
1249 | solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size) | |
1250 | { | |
3641da11 | 1251 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
de18c1d8 JM |
1252 | |
1253 | if (ops->keep_data_in_core) | |
1254 | return ops->keep_data_in_core (vaddr, size); | |
1255 | else | |
1256 | return 0; | |
1257 | } | |
1258 | ||
c906108c SS |
1259 | /* Called by free_all_symtabs */ |
1260 | ||
c5aa993b | 1261 | void |
fba45db2 | 1262 | clear_solib (void) |
c906108c | 1263 | { |
3641da11 | 1264 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 1265 | |
085dd6e6 JM |
1266 | /* This function is expected to handle ELF shared libraries. It is |
1267 | also used on Solaris, which can run either ELF or a.out binaries | |
1268 | (for compatibility with SunOS 4), both of which can use shared | |
1269 | libraries. So we don't know whether we have an ELF executable or | |
1270 | an a.out executable until the user chooses an executable file. | |
1271 | ||
1272 | ELF shared libraries don't get mapped into the address space | |
1273 | until after the program starts, so we'd better not try to insert | |
1274 | breakpoints in them immediately. We have to wait until the | |
1275 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
1276 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
1277 | it's ready. | |
1278 | ||
1279 | SunOS shared libraries seem to be different --- they're present | |
1280 | as soon as the process begins execution, so there's no need to | |
1281 | put off inserting breakpoints. There's also nowhere to put a | |
1282 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
1283 | around to it. | |
1284 | ||
1285 | So: disable breakpoints only if we're using ELF shared libs. */ | |
1286 | if (exec_bfd != NULL | |
1287 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
cb851954 | 1288 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 1289 | |
c906108c SS |
1290 | while (so_list_head) |
1291 | { | |
07cd4b97 | 1292 | struct so_list *so = so_list_head; |
433759f7 | 1293 | |
07cd4b97 | 1294 | so_list_head = so->next; |
c86cf029 | 1295 | observer_notify_solib_unloaded (so); |
046ac79f | 1296 | remove_target_sections (so); |
07cd4b97 | 1297 | free_so (so); |
c906108c | 1298 | } |
07cd4b97 | 1299 | |
66aba65d | 1300 | ops->clear_solib (); |
c906108c SS |
1301 | } |
1302 | ||
7f86f058 PA |
1303 | /* Shared library startup support. When GDB starts up the inferior, |
1304 | it nurses it along (through the shell) until it is ready to execute | |
1305 | its first instruction. At this point, this function gets | |
1306 | called. */ | |
c5aa993b JM |
1307 | |
1308 | void | |
268a4a75 | 1309 | solib_create_inferior_hook (int from_tty) |
c906108c | 1310 | { |
3641da11 | 1311 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1312 | |
268a4a75 | 1313 | ops->solib_create_inferior_hook (from_tty); |
c906108c SS |
1314 | } |
1315 | ||
7f86f058 PA |
1316 | /* Check to see if an address is in the dynamic loader's dynamic |
1317 | symbol resolution code. Return 1 if so, 0 otherwise. */ | |
d7fa2ae2 KB |
1318 | |
1319 | int | |
1320 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
1321 | { | |
3641da11 | 1322 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1323 | |
66aba65d | 1324 | return ops->in_dynsym_resolve_code (pc); |
d7fa2ae2 | 1325 | } |
c906108c | 1326 | |
7f86f058 | 1327 | /* Implements the "sharedlibrary" command. */ |
c906108c SS |
1328 | |
1329 | static void | |
fba45db2 | 1330 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
1331 | { |
1332 | dont_repeat (); | |
990f9fe3 | 1333 | solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
1334 | } |
1335 | ||
7f86f058 | 1336 | /* Implements the command "nosharedlibrary", which discards symbols |
cb0ba49e MS |
1337 | that have been auto-loaded from shared libraries. Symbols from |
1338 | shared libraries that were added by explicit request of the user | |
1339 | are not discarded. Also called from remote.c. */ | |
1340 | ||
c60a7562 MS |
1341 | void |
1342 | no_shared_libraries (char *ignored, int from_tty) | |
1343 | { | |
a3247a22 PP |
1344 | /* The order of the two routines below is important: clear_solib notifies |
1345 | the solib_unloaded observers, and some of these observers might need | |
1346 | access to their associated objfiles. Therefore, we can not purge the | |
1347 | solibs' objfiles before clear_solib has been called. */ | |
1348 | ||
615b9dba | 1349 | clear_solib (); |
a3247a22 | 1350 | objfile_purge_solibs (); |
c60a7562 | 1351 | } |
c906108c | 1352 | |
f9e14852 GB |
1353 | /* See solib.h. */ |
1354 | ||
1355 | void | |
1356 | update_solib_breakpoints (void) | |
1357 | { | |
1358 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1359 | ||
1360 | if (ops->update_breakpoints != NULL) | |
1361 | ops->update_breakpoints (); | |
1362 | } | |
1363 | ||
1364 | /* See solib.h. */ | |
1365 | ||
1366 | void | |
1367 | handle_solib_event (void) | |
1368 | { | |
1369 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1370 | ||
1371 | if (ops->handle_event != NULL) | |
1372 | ops->handle_event (); | |
1373 | ||
1374 | clear_program_space_solib_cache (current_inferior ()->pspace); | |
1375 | ||
1376 | /* Check for any newly added shared libraries if we're supposed to | |
1377 | be adding them automatically. Switch terminal for any messages | |
1378 | produced by breakpoint_re_set. */ | |
1379 | target_terminal_ours_for_output (); | |
1380 | solib_add (NULL, 0, ¤t_target, auto_solib_add); | |
1381 | target_terminal_inferior (); | |
1382 | } | |
1383 | ||
a86988f2 PA |
1384 | /* Reload shared libraries, but avoid reloading the same symbol file |
1385 | we already have loaded. */ | |
1386 | ||
1387 | static void | |
1388 | reload_shared_libraries_1 (int from_tty) | |
1389 | { | |
1390 | struct so_list *so; | |
1391 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); | |
1392 | ||
770e7fc7 DE |
1393 | if (print_symbol_loading_p (from_tty, 0, 0)) |
1394 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
1395 | ||
a86988f2 PA |
1396 | for (so = so_list_head; so != NULL; so = so->next) |
1397 | { | |
1398 | char *filename, *found_pathname = NULL; | |
1399 | bfd *abfd; | |
a86988f2 PA |
1400 | int was_loaded = so->symbols_loaded; |
1401 | const int flags = | |
1402 | SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0); | |
1403 | ||
1404 | filename = tilde_expand (so->so_original_name); | |
42b1321c | 1405 | make_cleanup (xfree, filename); |
a86988f2 PA |
1406 | abfd = solib_bfd_open (filename); |
1407 | if (abfd != NULL) | |
1408 | { | |
1409 | found_pathname = xstrdup (bfd_get_filename (abfd)); | |
1410 | make_cleanup (xfree, found_pathname); | |
cbb099e8 | 1411 | gdb_bfd_unref (abfd); |
a86988f2 PA |
1412 | } |
1413 | ||
1414 | /* If this shared library is no longer associated with its previous | |
1415 | symbol file, close that. */ | |
1416 | if ((found_pathname == NULL && was_loaded) | |
1417 | || (found_pathname != NULL | |
0ba1096a | 1418 | && filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1419 | { |
59145f8c AR |
1420 | if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED) |
1421 | && !solib_used (so)) | |
a86988f2 | 1422 | free_objfile (so->objfile); |
046ac79f | 1423 | remove_target_sections (so); |
0892cb63 | 1424 | clear_so (so); |
a86988f2 PA |
1425 | } |
1426 | ||
1427 | /* If this shared library is now associated with a new symbol | |
1428 | file, open it. */ | |
1429 | if (found_pathname != NULL | |
1430 | && (!was_loaded | |
0ba1096a | 1431 | || filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1432 | { |
492d29ea | 1433 | int got_error = 0; |
a86988f2 | 1434 | |
492d29ea PA |
1435 | TRY |
1436 | { | |
1437 | solib_map_sections (so); | |
1438 | } | |
1439 | ||
1440 | CATCH (e, RETURN_MASK_ERROR) | |
1441 | { | |
1442 | exception_fprintf (gdb_stderr, e, | |
1443 | _("Error while mapping " | |
1444 | "shared library sections:\n")); | |
1445 | got_error = 1; | |
1446 | } | |
1447 | END_CATCH | |
a86988f2 | 1448 | |
492d29ea PA |
1449 | if (!got_error |
1450 | && (auto_solib_add || was_loaded || libpthread_solib_p (so))) | |
1451 | solib_read_symbols (so, flags); | |
a86988f2 PA |
1452 | } |
1453 | } | |
1454 | ||
1455 | do_cleanups (old_chain); | |
1456 | } | |
1457 | ||
cf466558 | 1458 | static void |
f397e303 AC |
1459 | reload_shared_libraries (char *ignored, int from_tty, |
1460 | struct cmd_list_element *e) | |
cf466558 | 1461 | { |
3641da11 | 1462 | const struct target_so_ops *ops; |
a86988f2 PA |
1463 | |
1464 | reload_shared_libraries_1 (from_tty); | |
1465 | ||
f5656ead | 1466 | ops = solib_ops (target_gdbarch ()); |
a86988f2 | 1467 | |
c378eb4e | 1468 | /* Creating inferior hooks here has two purposes. First, if we reload |
c8fa6cdd VP |
1469 | shared libraries then the address of solib breakpoint we've computed |
1470 | previously might be no longer valid. For example, if we forgot to set | |
1471 | solib-absolute-prefix and are setting it right now, then the previous | |
1472 | breakpoint address is plain wrong. Second, installing solib hooks | |
1473 | also implicitly figures were ld.so is and loads symbols for it. | |
1474 | Absent this call, if we've just connected to a target and set | |
1475 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1476 | about ld.so. */ | |
1477 | if (target_has_execution) | |
1478 | { | |
a86988f2 PA |
1479 | /* Reset or free private data structures not associated with |
1480 | so_list entries. */ | |
1481 | ops->clear_solib (); | |
1482 | ||
1483 | /* Remove any previous solib event breakpoint. This is usually | |
1484 | done in common code, at breakpoint_init_inferior time, but | |
1485 | we're not really starting up the inferior here. */ | |
1486 | remove_solib_event_breakpoints (); | |
1487 | ||
268a4a75 | 1488 | solib_create_inferior_hook (from_tty); |
c8fa6cdd | 1489 | } |
268a4a75 JK |
1490 | |
1491 | /* Sometimes the platform-specific hook loads initial shared | |
1492 | libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be | |
1493 | incorrectly 0 but such solib targets should be fixed anyway. If we | |
1494 | made all the inferior hook methods consistent, this call could be | |
1495 | removed. Call it only after the solib target has been initialized by | |
1496 | solib_create_inferior_hook. */ | |
1497 | ||
1498 | solib_add (NULL, 0, NULL, auto_solib_add); | |
1499 | ||
a86988f2 PA |
1500 | breakpoint_re_set (); |
1501 | ||
1502 | /* We may have loaded or unloaded debug info for some (or all) | |
1503 | shared libraries. However, frames may still reference them. For | |
1504 | example, a frame's unwinder might still point at DWARF FDE | |
1505 | structures that are now freed. Also, getting new symbols may | |
1506 | change our opinion about what is frameless. */ | |
c8fa6cdd | 1507 | reinit_frame_cache (); |
a86988f2 PA |
1508 | |
1509 | ops->special_symbol_handling (); | |
cf466558 KB |
1510 | } |
1511 | ||
2938e6cf GB |
1512 | /* Wrapper for reload_shared_libraries that replaces "remote:" |
1513 | at the start of gdb_sysroot with "target:". */ | |
1514 | ||
1515 | static void | |
1516 | gdb_sysroot_changed (char *ignored, int from_tty, | |
1517 | struct cmd_list_element *e) | |
1518 | { | |
1519 | const char *old_prefix = "remote:"; | |
1520 | const char *new_prefix = TARGET_SYSROOT_PREFIX; | |
1521 | ||
1522 | if (startswith (gdb_sysroot, old_prefix)) | |
1523 | { | |
1524 | static int warning_issued = 0; | |
1525 | ||
1526 | gdb_assert (strlen (old_prefix) == strlen (new_prefix)); | |
1527 | memcpy (gdb_sysroot, new_prefix, strlen (new_prefix)); | |
1528 | ||
1529 | if (!warning_issued) | |
1530 | { | |
1531 | warning (_("\"%s\" is deprecated, use \"%s\" instead."), | |
1532 | old_prefix, new_prefix); | |
1533 | warning (_("sysroot set to \"%s\"."), gdb_sysroot); | |
1534 | ||
1535 | warning_issued = 1; | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | reload_shared_libraries (ignored, from_tty, e); | |
1540 | } | |
1541 | ||
920d2a44 AC |
1542 | static void |
1543 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1544 | struct cmd_list_element *c, const char *value) | |
1545 | { | |
1546 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
1547 | value); | |
1548 | } | |
1549 | ||
1550 | ||
3a40aaa0 UW |
1551 | /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call |
1552 | the library-specific handler if it is installed for the current target. */ | |
1553 | ||
1554 | struct symbol * | |
efad9b6a | 1555 | solib_global_lookup (struct objfile *objfile, |
3a40aaa0 | 1556 | const char *name, |
21b556f4 | 1557 | const domain_enum domain) |
3a40aaa0 | 1558 | { |
9c1877ea | 1559 | const struct target_so_ops *ops = solib_ops (get_objfile_arch (objfile)); |
3a40aaa0 | 1560 | |
e8a92f7b | 1561 | if (ops->lookup_lib_global_symbol != NULL) |
94af9270 | 1562 | return ops->lookup_lib_global_symbol (objfile, name, domain); |
3a40aaa0 UW |
1563 | return NULL; |
1564 | } | |
1565 | ||
cb457ae2 YQ |
1566 | /* Lookup the value for a specific symbol from dynamic symbol table. Look |
1567 | up symbol from ABFD. MATCH_SYM is a callback function to determine | |
1568 | whether to pick up a symbol. DATA is the input of this callback | |
1569 | function. Return NULL if symbol is not found. */ | |
1570 | ||
1571 | CORE_ADDR | |
1572 | gdb_bfd_lookup_symbol_from_symtab (bfd *abfd, | |
1573 | int (*match_sym) (asymbol *, void *), | |
1574 | void *data) | |
1575 | { | |
1576 | long storage_needed = bfd_get_symtab_upper_bound (abfd); | |
1577 | CORE_ADDR symaddr = 0; | |
1578 | ||
1579 | if (storage_needed > 0) | |
1580 | { | |
1581 | unsigned int i; | |
1582 | ||
1583 | asymbol **symbol_table = (asymbol **) xmalloc (storage_needed); | |
1584 | struct cleanup *back_to = make_cleanup (xfree, symbol_table); | |
1585 | unsigned int number_of_symbols = | |
1586 | bfd_canonicalize_symtab (abfd, symbol_table); | |
1587 | ||
1588 | for (i = 0; i < number_of_symbols; i++) | |
1589 | { | |
1590 | asymbol *sym = *symbol_table++; | |
1591 | ||
1592 | if (match_sym (sym, data)) | |
1593 | { | |
3e29f34a MR |
1594 | struct gdbarch *gdbarch = target_gdbarch (); |
1595 | symaddr = sym->value; | |
1596 | ||
1597 | /* Some ELF targets fiddle with addresses of symbols they | |
1598 | consider special. They use minimal symbols to do that | |
1599 | and this is needed for correct breakpoint placement, | |
1600 | but we do not have full data here to build a complete | |
1601 | minimal symbol, so just set the address and let the | |
1602 | targets cope with that. */ | |
1603 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
1604 | && gdbarch_elf_make_msymbol_special_p (gdbarch)) | |
1605 | { | |
1606 | struct minimal_symbol msym; | |
1607 | ||
1608 | memset (&msym, 0, sizeof (msym)); | |
1609 | SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr); | |
1610 | gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym); | |
1611 | symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym); | |
1612 | } | |
1613 | ||
cb457ae2 | 1614 | /* BFD symbols are section relative. */ |
3e29f34a | 1615 | symaddr += sym->section->vma; |
cb457ae2 YQ |
1616 | break; |
1617 | } | |
1618 | } | |
1619 | do_cleanups (back_to); | |
1620 | } | |
1621 | ||
1622 | return symaddr; | |
1623 | } | |
1624 | ||
1625 | /* Lookup the value for a specific symbol from symbol table. Look up symbol | |
1626 | from ABFD. MATCH_SYM is a callback function to determine whether to pick | |
1627 | up a symbol. DATA is the input of this callback function. Return NULL | |
1628 | if symbol is not found. */ | |
1629 | ||
1630 | static CORE_ADDR | |
1631 | bfd_lookup_symbol_from_dyn_symtab (bfd *abfd, | |
1632 | int (*match_sym) (asymbol *, void *), | |
1633 | void *data) | |
1634 | { | |
1635 | long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd); | |
1636 | CORE_ADDR symaddr = 0; | |
1637 | ||
1638 | if (storage_needed > 0) | |
1639 | { | |
1640 | unsigned int i; | |
1641 | asymbol **symbol_table = (asymbol **) xmalloc (storage_needed); | |
1642 | struct cleanup *back_to = make_cleanup (xfree, symbol_table); | |
1643 | unsigned int number_of_symbols = | |
1644 | bfd_canonicalize_dynamic_symtab (abfd, symbol_table); | |
1645 | ||
1646 | for (i = 0; i < number_of_symbols; i++) | |
1647 | { | |
1648 | asymbol *sym = *symbol_table++; | |
1649 | ||
1650 | if (match_sym (sym, data)) | |
1651 | { | |
1652 | /* BFD symbols are section relative. */ | |
1653 | symaddr = sym->value + sym->section->vma; | |
1654 | break; | |
1655 | } | |
1656 | } | |
1657 | do_cleanups (back_to); | |
1658 | } | |
1659 | return symaddr; | |
1660 | } | |
1661 | ||
1662 | /* Lookup the value for a specific symbol from symbol table and dynamic | |
1663 | symbol table. Look up symbol from ABFD. MATCH_SYM is a callback | |
1664 | function to determine whether to pick up a symbol. DATA is the | |
1665 | input of this callback function. Return NULL if symbol is not | |
1666 | found. */ | |
1667 | ||
1668 | CORE_ADDR | |
1669 | gdb_bfd_lookup_symbol (bfd *abfd, | |
1670 | int (*match_sym) (asymbol *, void *), | |
1671 | void *data) | |
1672 | { | |
1673 | CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data); | |
1674 | ||
1675 | /* On FreeBSD, the dynamic linker is stripped by default. So we'll | |
1676 | have to check the dynamic string table too. */ | |
1677 | if (symaddr == 0) | |
1678 | symaddr = bfd_lookup_symbol_from_dyn_symtab (abfd, match_sym, data); | |
1679 | ||
1680 | return symaddr; | |
1681 | } | |
3a40aaa0 | 1682 | |
63644780 NB |
1683 | /* SO_LIST_HEAD may contain user-loaded object files that can be removed |
1684 | out-of-band by the user. So upon notification of free_objfile remove | |
1685 | all references to any user-loaded file that is about to be freed. */ | |
1686 | ||
1687 | static void | |
1688 | remove_user_added_objfile (struct objfile *objfile) | |
1689 | { | |
1690 | struct so_list *so; | |
1691 | ||
1692 | if (objfile != 0 && objfile->flags & OBJF_USERLOADED) | |
1693 | { | |
1694 | for (so = so_list_head; so != NULL; so = so->next) | |
1695 | if (so->objfile == objfile) | |
1696 | so->objfile = NULL; | |
1697 | } | |
1698 | } | |
1699 | ||
ca5268b6 JK |
1700 | /* Default implementation does not perform any validation. */ |
1701 | ||
1702 | char * | |
1703 | default_solib_validate (const struct so_list *const so) | |
1704 | { | |
1705 | return NULL; /* No validation. */ | |
1706 | } | |
1707 | ||
a78f21af AC |
1708 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
1709 | ||
c906108c | 1710 | void |
fba45db2 | 1711 | _initialize_solib (void) |
c906108c | 1712 | { |
66aba65d MK |
1713 | solib_data = gdbarch_data_register_pre_init (solib_init); |
1714 | ||
63644780 NB |
1715 | observer_attach_free_objfile (remove_user_added_objfile); |
1716 | ||
c906108c | 1717 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1718 | _("Load shared object library symbols for files matching REGEXP.")); |
c5aa993b | 1719 | add_info ("sharedlibrary", info_sharedlibrary_command, |
1bedd215 | 1720 | _("Status of loaded shared object libraries.")); |
b30a0bc3 | 1721 | add_info_alias ("dll", "sharedlibrary", 1); |
c60a7562 | 1722 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1723 | _("Unload all shared object library symbols.")); |
c906108c | 1724 | |
5bf193a2 AC |
1725 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1726 | &auto_solib_add, _("\ | |
1727 | Set autoloading of shared library symbols."), _("\ | |
1728 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1729 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1730 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1731 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
3e43a32a MS |
1732 | inferior. Otherwise, symbols must be loaded manually, using \ |
1733 | `sharedlibrary'."), | |
5bf193a2 | 1734 | NULL, |
920d2a44 | 1735 | show_auto_solib_add, |
5bf193a2 | 1736 | &setlist, &showlist); |
c906108c | 1737 | |
811a659a GB |
1738 | add_setshow_optional_filename_cmd ("sysroot", class_support, |
1739 | &gdb_sysroot, _("\ | |
f822c95b DJ |
1740 | Set an alternate system root."), _("\ |
1741 | Show the current system root."), _("\ | |
1742 | The system root is used to load absolute shared library symbol files.\n\ | |
1743 | For other (relative) files, you can add directories using\n\ | |
1744 | `set solib-search-path'."), | |
2938e6cf | 1745 | gdb_sysroot_changed, |
811a659a GB |
1746 | NULL, |
1747 | &setlist, &showlist); | |
c906108c | 1748 | |
f822c95b DJ |
1749 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, |
1750 | &setlist); | |
1751 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, | |
1752 | &showlist); | |
030292b7 | 1753 | |
525226b5 AC |
1754 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1755 | &solib_search_path, _("\ | |
3e43a32a MS |
1756 | Set the search path for loading non-absolute shared library symbol files."), |
1757 | _("\ | |
1758 | Show the search path for loading non-absolute shared library symbol files."), | |
1759 | _("\ | |
1760 | This takes precedence over the environment variables \ | |
1761 | PATH and LD_LIBRARY_PATH."), | |
525226b5 | 1762 | reload_shared_libraries, |
920d2a44 | 1763 | show_solib_search_path, |
525226b5 | 1764 | &setlist, &showlist); |
ca5268b6 JK |
1765 | |
1766 | add_setshow_boolean_cmd ("validate-build-id", class_support, | |
1767 | &validate_build_id, _("\ | |
1768 | Set validation a build-id matches to load a shared library."), _("\ | |
1769 | SHow validation a build-id matches to load a shared library."), _("\ | |
1770 | Inferior shared library and symbol file may contain unique build-id.\n\ | |
1771 | If both build-ids are present but they do not match then this setting\n\ | |
1772 | enables (off) or disables (on) loading of such symbol file.\n\ | |
1773 | Loading non-matching symbol file may confuse debugging including breakage\n\ | |
1774 | of backtrace output."), | |
1775 | NULL, | |
1776 | show_validate_build_id, | |
1777 | &setlist, &showlist); | |
1778 | ||
c906108c | 1779 | } |