Commit | Line | Data |
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13437d4b | 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
14a5e767 | 2 | |
61baf725 | 3 | Copyright (C) 1990-2017 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 | { | |
19ba03f4 SM |
68 | const struct target_so_ops **ops |
69 | = (const struct target_so_ops **) gdbarch_data (gdbarch, solib_data); | |
433759f7 | 70 | |
66aba65d MK |
71 | return *ops; |
72 | } | |
7d522c90 DJ |
73 | |
74 | /* Set the solib operations for GDBARCH to NEW_OPS. */ | |
75 | ||
76 | void | |
3641da11 | 77 | set_solib_ops (struct gdbarch *gdbarch, const struct target_so_ops *new_ops) |
7d522c90 | 78 | { |
19ba03f4 SM |
79 | const struct target_so_ops **ops |
80 | = (const struct target_so_ops **) gdbarch_data (gdbarch, solib_data); | |
433759f7 | 81 | |
7d522c90 DJ |
82 | *ops = new_ops; |
83 | } | |
66aba65d MK |
84 | \f |
85 | ||
13437d4b | 86 | /* external data declarations */ |
c906108c | 87 | |
7d522c90 DJ |
88 | /* FIXME: gdbarch needs to control this variable, or else every |
89 | configuration needs to call set_solib_ops. */ | |
13437d4b | 90 | struct target_so_ops *current_target_so_ops; |
23e04971 | 91 | |
6c95b8df PA |
92 | /* List of known shared objects */ |
93 | #define so_list_head current_program_space->so_list | |
23e04971 | 94 | |
c906108c SS |
95 | /* Local function prototypes */ |
96 | ||
c906108c SS |
97 | /* If non-empty, this is a search path for loading non-absolute shared library |
98 | symbol files. This takes precedence over the environment variables PATH | |
99 | and LD_LIBRARY_PATH. */ | |
100 | static char *solib_search_path = NULL; | |
920d2a44 AC |
101 | static void |
102 | show_solib_search_path (struct ui_file *file, int from_tty, | |
103 | struct cmd_list_element *c, const char *value) | |
104 | { | |
3e43a32a MS |
105 | fprintf_filtered (file, _("The search path for loading non-absolute " |
106 | "shared library symbol files is %s.\n"), | |
920d2a44 AC |
107 | value); |
108 | } | |
c906108c | 109 | |
ab38a727 PA |
110 | /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */ |
111 | #if (HAVE_DOS_BASED_FILE_SYSTEM) | |
112 | # define DOS_BASED_FILE_SYSTEM 1 | |
113 | #else | |
114 | # define DOS_BASED_FILE_SYSTEM 0 | |
115 | #endif | |
116 | ||
af1900b0 GB |
117 | /* Return the full pathname of a binary file (the main executable |
118 | or a shared library file), or NULL if not found. The returned | |
998d2a3e GB |
119 | pathname is malloc'ed and must be freed by the caller. If FD |
120 | is non-NULL, *FD is set to either -1 or an open file handle for | |
121 | the binary file. | |
e4f7b8c8 | 122 | |
f822c95b | 123 | Global variable GDB_SYSROOT is used as a prefix directory |
af1900b0 | 124 | to search for binary files if they have an absolute path. |
b57fbfba GB |
125 | If GDB_SYSROOT starts with "target:" and target filesystem |
126 | is the local filesystem then the "target:" prefix will be | |
127 | stripped before the search starts. This ensures that the | |
128 | same search algorithm is used for local files regardless of | |
129 | whether a "target:" prefix was used. | |
e4f7b8c8 MS |
130 | |
131 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
132 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
b57fbfba | 133 | shared libraries if not found in either the sysroot (if set) or |
af1900b0 GB |
134 | the local filesystem. SOLIB_SEARCH_PATH is not used when searching |
135 | for the main executable. | |
e4f7b8c8 | 136 | |
c8c18e65 | 137 | Search algorithm: |
b57fbfba GB |
138 | * If a sysroot is set and path is absolute: |
139 | * Search for sysroot/path. | |
c8c18e65 KW |
140 | * else |
141 | * Look for it literally (unmodified). | |
af1900b0 GB |
142 | * If IS_SOLIB is non-zero: |
143 | * Look in SOLIB_SEARCH_PATH. | |
144 | * If available, use target defined search function. | |
b57fbfba | 145 | * If NO sysroot is set, perform the following two searches: |
c8c18e65 | 146 | * Look in inferior's $PATH. |
af1900b0 GB |
147 | * If IS_SOLIB is non-zero: |
148 | * Look in inferior's $LD_LIBRARY_PATH. | |
ab38a727 | 149 | * |
c8c18e65 | 150 | * The last check avoids doing this search when targetting remote |
b57fbfba | 151 | * machines since a sysroot will almost always be set. |
7f86f058 | 152 | */ |
e4f7b8c8 | 153 | |
af1900b0 | 154 | static char * |
992f1ddc | 155 | solib_find_1 (const char *in_pathname, int *fd, int is_solib) |
e4f7b8c8 | 156 | { |
3641da11 | 157 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
e4f7b8c8 MS |
158 | int found_file = -1; |
159 | char *temp_pathname = NULL; | |
ab38a727 PA |
160 | const char *fskind = effective_target_file_system_kind (); |
161 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); | |
b57fbfba | 162 | char *sysroot = gdb_sysroot; |
f8773be1 | 163 | int prefix_len, orig_prefix_len; |
08105857 | 164 | |
a3be80c3 GB |
165 | /* If the absolute prefix starts with "target:" but the filesystem |
166 | accessed by the target_fileio_* methods is the local filesystem | |
167 | then we strip the "target:" prefix now and work with the local | |
168 | filesystem. This ensures that the same search algorithm is used | |
169 | for all local files regardless of whether a "target:" prefix was | |
170 | used. */ | |
171 | if (is_target_filename (sysroot) && target_filesystem_is_local ()) | |
172 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
173 | ||
f8773be1 GB |
174 | /* Strip any trailing slashes from the absolute prefix. */ |
175 | prefix_len = orig_prefix_len = strlen (sysroot); | |
f1d10cfb | 176 | |
f8773be1 GB |
177 | while (prefix_len > 0 && IS_DIR_SEPARATOR (sysroot[prefix_len - 1])) |
178 | prefix_len--; | |
f1d10cfb | 179 | |
f8773be1 GB |
180 | if (prefix_len == 0) |
181 | sysroot = NULL; | |
182 | else if (prefix_len != orig_prefix_len) | |
183 | { | |
b57fbfba | 184 | sysroot = savestring (sysroot, prefix_len); |
ab38a727 PA |
185 | make_cleanup (xfree, sysroot); |
186 | } | |
187 | ||
188 | /* If we're on a non-DOS-based system, backslashes won't be | |
189 | understood as directory separator, so, convert them to forward | |
190 | slashes, iff we're supposed to handle DOS-based file system | |
191 | semantics for target paths. */ | |
192 | if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based) | |
193 | { | |
194 | char *p; | |
195 | ||
196 | /* Avoid clobbering our input. */ | |
224c3ddb | 197 | p = (char *) alloca (strlen (in_pathname) + 1); |
ab38a727 PA |
198 | strcpy (p, in_pathname); |
199 | in_pathname = p; | |
200 | ||
201 | for (; *p; p++) | |
202 | { | |
203 | if (*p == '\\') | |
204 | *p = '/'; | |
205 | } | |
206 | } | |
207 | ||
208 | /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not | |
209 | IS_ABSOLUTE_PATH. The latter is for host paths only, while | |
210 | IN_PATHNAME is a target path. For example, if we're supposed to | |
211 | be handling DOS-like semantics we want to consider a | |
212 | 'c:/foo/bar.dll' path as an absolute path, even on a Unix box. | |
213 | With such a path, before giving up on the sysroot, we'll try: | |
214 | ||
215 | 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll | |
216 | 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll | |
217 | 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll | |
218 | */ | |
219 | ||
b57fbfba | 220 | if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL) |
ab38a727 PA |
221 | temp_pathname = xstrdup (in_pathname); |
222 | else | |
223 | { | |
224 | int need_dir_separator; | |
225 | ||
3736004f PA |
226 | /* Concatenate the sysroot and the target reported filename. We |
227 | may need to glue them with a directory separator. Cases to | |
228 | consider: | |
229 | ||
230 | | sysroot | separator | in_pathname | | |
231 | |-----------------+-----------+----------------| | |
232 | | /some/dir | / | c:/foo/bar.dll | | |
233 | | /some/dir | | /foo/bar.dll | | |
2938e6cf GB |
234 | | target: | | c:/foo/bar.dll | |
235 | | target: | | /foo/bar.dll | | |
236 | | target:some/dir | / | c:/foo/bar.dll | | |
237 | | target:some/dir | | /foo/bar.dll | | |
3736004f PA |
238 | |
239 | IOW, we don't need to add a separator if IN_PATHNAME already | |
2938e6cf | 240 | has one, or when the the sysroot is exactly "target:". |
3736004f PA |
241 | There's no need to check for drive spec explicitly, as we only |
242 | get here if IN_PATHNAME is considered an absolute path. */ | |
243 | need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0]) | |
2938e6cf | 244 | || strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0); |
ab38a727 | 245 | |
f1d10cfb | 246 | /* Cat the prefixed pathname together. */ |
ab38a727 PA |
247 | temp_pathname = concat (sysroot, |
248 | need_dir_separator ? SLASH_STRING : "", | |
249 | in_pathname, (char *) NULL); | |
e4f7b8c8 MS |
250 | } |
251 | ||
2938e6cf GB |
252 | /* Handle files to be accessed via the target. */ |
253 | if (is_target_filename (temp_pathname)) | |
f1838a98 | 254 | { |
998d2a3e GB |
255 | if (fd != NULL) |
256 | *fd = -1; | |
f748fb40 | 257 | do_cleanups (old_chain); |
ab38a727 | 258 | return temp_pathname; |
f1838a98 UW |
259 | } |
260 | ||
f1d10cfb | 261 | /* Now see if we can open it. */ |
614c279d | 262 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
263 | if (found_file < 0) |
264 | xfree (temp_pathname); | |
265 | ||
266 | /* If the search in gdb_sysroot failed, and the path name has a | |
267 | drive spec (e.g, c:/foo), try stripping ':' from the drive spec, | |
268 | and retrying in the sysroot: | |
269 | c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */ | |
f1d10cfb | 270 | |
ab38a727 | 271 | if (found_file < 0 |
b57fbfba | 272 | && sysroot != NULL |
ab38a727 PA |
273 | && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname)) |
274 | { | |
275 | int need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]); | |
276 | char *drive = savestring (in_pathname, 1); | |
277 | ||
278 | temp_pathname = concat (sysroot, | |
279 | SLASH_STRING, | |
280 | drive, | |
281 | need_dir_separator ? SLASH_STRING : "", | |
282 | in_pathname + 2, (char *) NULL); | |
283 | xfree (drive); | |
284 | ||
614c279d | 285 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
286 | if (found_file < 0) |
287 | { | |
ab38a727 PA |
288 | xfree (temp_pathname); |
289 | ||
290 | /* If the search in gdb_sysroot still failed, try fully | |
291 | stripping the drive spec, and trying once more in the | |
292 | sysroot before giving up. | |
293 | ||
294 | c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */ | |
295 | ||
296 | temp_pathname = concat (sysroot, | |
297 | need_dir_separator ? SLASH_STRING : "", | |
298 | in_pathname + 2, (char *) NULL); | |
299 | ||
614c279d | 300 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
301 | if (found_file < 0) |
302 | xfree (temp_pathname); | |
303 | } | |
304 | } | |
0997b535 | 305 | |
ab38a727 PA |
306 | do_cleanups (old_chain); |
307 | ||
308 | /* We try to find the library in various ways. After each attempt, | |
309 | either found_file >= 0 and temp_pathname is a malloc'd string, or | |
310 | found_file < 0 and temp_pathname does not point to storage that | |
311 | needs to be freed. */ | |
312 | ||
313 | if (found_file < 0) | |
314 | temp_pathname = NULL; | |
315 | ||
f822c95b | 316 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
317 | absolute at this point, make it relative. (openp will try and open the |
318 | file according to its absolute path otherwise, which is not what we want.) | |
319 | Affects subsequent searches for this solib. */ | |
ab38a727 | 320 | if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
ba5f0d88 OF |
321 | { |
322 | /* First, get rid of any drive letters etc. */ | |
ab38a727 PA |
323 | while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
324 | in_pathname++; | |
ba5f0d88 OF |
325 | |
326 | /* Next, get rid of all leading dir separators. */ | |
ab38a727 PA |
327 | while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
328 | in_pathname++; | |
ba5f0d88 | 329 | } |
ab38a727 | 330 | |
af1900b0 GB |
331 | /* If not found, and we're looking for a solib, search the |
332 | solib_search_path (if any). */ | |
333 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
334 | found_file = openp (solib_search_path, |
335 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
fbdebf46 | 336 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ab38a727 | 337 | |
af1900b0 GB |
338 | /* If not found, and we're looking for a solib, next search the |
339 | solib_search_path (if any) for the basename only (ignoring the | |
340 | path). This is to allow reading solibs from a path that differs | |
341 | from the opened path. */ | |
342 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
343 | found_file = openp (solib_search_path, |
344 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
ab38a727 PA |
345 | target_lbasename (fskind, in_pathname), |
346 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 347 | |
af1900b0 GB |
348 | /* If not found, and we're looking for a solib, try to use target |
349 | supplied solib search method. */ | |
350 | if (is_solib && found_file < 0 && ops->find_and_open_solib) | |
637d6690 | 351 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 352 | &temp_pathname); |
2610b0bf | 353 | |
c378eb4e | 354 | /* If not found, next search the inferior's $PATH environment variable. */ |
b57fbfba | 355 | if (found_file < 0 && sysroot == NULL) |
3f81c18a VP |
356 | found_file = openp (get_in_environ (current_inferior ()->environment, |
357 | "PATH"), | |
492c0ab7 JK |
358 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
359 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 360 | |
af1900b0 GB |
361 | /* If not found, and we're looking for a solib, next search the |
362 | inferior's $LD_LIBRARY_PATH environment variable. */ | |
363 | if (is_solib && found_file < 0 && sysroot == NULL) | |
3f81c18a VP |
364 | found_file = openp (get_in_environ (current_inferior ()->environment, |
365 | "LD_LIBRARY_PATH"), | |
492c0ab7 JK |
366 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
367 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 368 | |
998d2a3e GB |
369 | if (fd == NULL) |
370 | { | |
371 | if (found_file >= 0) | |
372 | close (found_file); | |
373 | } | |
374 | else | |
375 | *fd = found_file; | |
376 | ||
572d275c UW |
377 | return temp_pathname; |
378 | } | |
379 | ||
af1900b0 GB |
380 | /* Return the full pathname of the main executable, or NULL if not |
381 | found. The returned pathname is malloc'ed and must be freed by | |
998d2a3e | 382 | the caller. If FD is non-NULL, *FD is set to either -1 or an open |
ecf45d2c | 383 | file handle for the main executable. */ |
af1900b0 GB |
384 | |
385 | char * | |
992f1ddc | 386 | exec_file_find (const char *in_pathname, int *fd) |
af1900b0 | 387 | { |
ecf45d2c SL |
388 | char *result; |
389 | const char *fskind = effective_target_file_system_kind (); | |
390 | ||
391 | if (in_pathname == NULL) | |
392 | return NULL; | |
af1900b0 | 393 | |
ecf45d2c | 394 | if (*gdb_sysroot != '\0' && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
af1900b0 | 395 | { |
ecf45d2c | 396 | result = solib_find_1 (in_pathname, fd, 0); |
af1900b0 | 397 | |
ecf45d2c | 398 | if (result == NULL && fskind == file_system_kind_dos_based) |
af1900b0 GB |
399 | { |
400 | char *new_pathname; | |
401 | ||
224c3ddb | 402 | new_pathname = (char *) alloca (strlen (in_pathname) + 5); |
af1900b0 GB |
403 | strcpy (new_pathname, in_pathname); |
404 | strcat (new_pathname, ".exe"); | |
405 | ||
406 | result = solib_find_1 (new_pathname, fd, 0); | |
407 | } | |
408 | } | |
ecf45d2c SL |
409 | else |
410 | { | |
411 | /* It's possible we don't have a full path, but rather just a | |
412 | filename. Some targets, such as HP-UX, don't provide the | |
413 | full path, sigh. | |
414 | ||
415 | Attempt to qualify the filename against the source path. | |
416 | (If that fails, we'll just fall back on the original | |
417 | filename. Not much more we can do...) */ | |
418 | ||
419 | if (!source_full_path_of (in_pathname, &result)) | |
420 | result = xstrdup (in_pathname); | |
421 | if (fd != NULL) | |
422 | *fd = -1; | |
423 | } | |
af1900b0 GB |
424 | |
425 | return result; | |
426 | } | |
427 | ||
428 | /* Return the full pathname of a shared library file, or NULL if not | |
429 | found. The returned pathname is malloc'ed and must be freed by | |
998d2a3e GB |
430 | the caller. If FD is non-NULL, *FD is set to either -1 or an open |
431 | file handle for the shared library. | |
af1900b0 GB |
432 | |
433 | The search algorithm used is described in solib_find_1's comment | |
434 | above. */ | |
435 | ||
436 | char * | |
992f1ddc | 437 | solib_find (const char *in_pathname, int *fd) |
af1900b0 GB |
438 | { |
439 | const char *solib_symbols_extension | |
440 | = gdbarch_solib_symbols_extension (target_gdbarch ()); | |
441 | ||
442 | /* If solib_symbols_extension is set, replace the file's | |
443 | extension. */ | |
444 | if (solib_symbols_extension != NULL) | |
445 | { | |
992f1ddc | 446 | const char *p = in_pathname + strlen (in_pathname); |
af1900b0 GB |
447 | |
448 | while (p > in_pathname && *p != '.') | |
449 | p--; | |
450 | ||
451 | if (*p == '.') | |
452 | { | |
453 | char *new_pathname; | |
454 | ||
224c3ddb SM |
455 | new_pathname |
456 | = (char *) alloca (p - in_pathname + 1 | |
457 | + strlen (solib_symbols_extension) + 1); | |
af1900b0 GB |
458 | memcpy (new_pathname, in_pathname, p - in_pathname + 1); |
459 | strcpy (new_pathname + (p - in_pathname) + 1, | |
460 | solib_symbols_extension); | |
461 | ||
462 | in_pathname = new_pathname; | |
463 | } | |
464 | } | |
465 | ||
466 | return solib_find_1 (in_pathname, fd, 1); | |
467 | } | |
468 | ||
572d275c UW |
469 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, |
470 | it is used as file handle to open the file. Throws an error if the file | |
471 | could not be opened. Handles both local and remote file access. | |
472 | ||
a4453b7e TT |
473 | PATHNAME must be malloc'ed by the caller. It will be freed by this |
474 | function. If unsuccessful, the FD will be closed (unless FD was | |
475 | -1). */ | |
572d275c | 476 | |
192b62ce | 477 | gdb_bfd_ref_ptr |
572d275c UW |
478 | solib_bfd_fopen (char *pathname, int fd) |
479 | { | |
192b62ce | 480 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (pathname, gnutarget, fd)); |
572d275c | 481 | |
192b62ce TT |
482 | if (abfd != NULL && !gdb_bfd_has_target_filename (abfd.get ())) |
483 | bfd_set_cacheable (abfd.get (), 1); | |
f1838a98 | 484 | |
192b62ce | 485 | if (abfd == NULL) |
f1838a98 | 486 | { |
572d275c | 487 | make_cleanup (xfree, pathname); |
f1838a98 | 488 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 489 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
490 | } |
491 | ||
a4453b7e TT |
492 | xfree (pathname); |
493 | ||
520b0001 | 494 | return abfd; |
572d275c UW |
495 | } |
496 | ||
497 | /* Find shared library PATHNAME and open a BFD for it. */ | |
498 | ||
192b62ce | 499 | gdb_bfd_ref_ptr |
572d275c UW |
500 | solib_bfd_open (char *pathname) |
501 | { | |
572d275c UW |
502 | char *found_pathname; |
503 | int found_file; | |
378d2b72 | 504 | const struct bfd_arch_info *b; |
572d275c | 505 | |
572d275c UW |
506 | /* Search for shared library file. */ |
507 | found_pathname = solib_find (pathname, &found_file); | |
508 | if (found_pathname == NULL) | |
048d532d PA |
509 | { |
510 | /* Return failure if the file could not be found, so that we can | |
511 | accumulate messages about missing libraries. */ | |
512 | if (errno == ENOENT) | |
513 | return NULL; | |
514 | ||
515 | perror_with_name (pathname); | |
516 | } | |
572d275c UW |
517 | |
518 | /* Open bfd for shared library. */ | |
192b62ce | 519 | gdb_bfd_ref_ptr abfd (solib_bfd_fopen (found_pathname, found_file)); |
572d275c UW |
520 | |
521 | /* Check bfd format. */ | |
192b62ce TT |
522 | if (!bfd_check_format (abfd.get (), bfd_object)) |
523 | error (_("`%s': not in executable format: %s"), | |
524 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
f1838a98 | 525 | |
378d2b72 | 526 | /* Check bfd arch. */ |
f5656ead | 527 | b = gdbarch_bfd_arch_info (target_gdbarch ()); |
192b62ce | 528 | if (!b->compatible (b, bfd_get_arch_info (abfd.get ()))) |
378d2b72 | 529 | warning (_("`%s': Shared library architecture %s is not compatible " |
a4453b7e | 530 | "with target architecture %s."), bfd_get_filename (abfd), |
192b62ce TT |
531 | bfd_get_arch_info (abfd.get ())->printable_name, |
532 | b->printable_name); | |
378d2b72 | 533 | |
f1838a98 | 534 | return abfd; |
e4f7b8c8 MS |
535 | } |
536 | ||
7f86f058 PA |
537 | /* Given a pointer to one of the shared objects in our list of mapped |
538 | objects, use the recorded name to open a bfd descriptor for the | |
539 | object, build a section table, relocate all the section addresses | |
540 | by the base address at which the shared object was mapped, and then | |
541 | add the sections to the target's section table. | |
e4f7b8c8 | 542 | |
7f86f058 PA |
543 | FIXME: In most (all?) cases the shared object file name recorded in |
544 | the dynamic linkage tables will be a fully qualified pathname. For | |
c5aa993b JM |
545 | cases where it isn't, do we really mimic the systems search |
546 | mechanism correctly in the below code (particularly the tilde | |
7f86f058 | 547 | expansion stuff?). */ |
c906108c SS |
548 | |
549 | static int | |
048d532d | 550 | solib_map_sections (struct so_list *so) |
c906108c | 551 | { |
3641da11 | 552 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
db1ff28b | 553 | char *filename; |
0542c86d | 554 | struct target_section *p; |
c906108c | 555 | struct cleanup *old_chain; |
c5aa993b JM |
556 | |
557 | filename = tilde_expand (so->so_name); | |
b8c9b27d | 558 | old_chain = make_cleanup (xfree, filename); |
192b62ce | 559 | gdb_bfd_ref_ptr abfd (ops->bfd_open (filename)); |
f1838a98 | 560 | do_cleanups (old_chain); |
e4f7b8c8 | 561 | |
048d532d PA |
562 | if (abfd == NULL) |
563 | return 0; | |
564 | ||
13437d4b | 565 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
192b62ce | 566 | so->abfd = abfd.release (); |
23e04971 | 567 | |
b030cf11 JB |
568 | /* Copy the full path name into so_name, allowing symbol_file_add |
569 | to find it later. This also affects the =library-loaded GDB/MI | |
570 | event, and in particular the part of that notification providing | |
571 | the library's host-side path. If we let the target dictate | |
572 | that objfile's path, and the target is different from the host, | |
573 | GDB/MI will not provide the correct host-side path. */ | |
192b62ce | 574 | if (strlen (bfd_get_filename (so->abfd)) >= SO_NAME_MAX_PATH_SIZE) |
b030cf11 | 575 | error (_("Shared library file name is too long.")); |
192b62ce | 576 | strcpy (so->so_name, bfd_get_filename (so->abfd)); |
b030cf11 | 577 | |
192b62ce | 578 | if (build_section_table (so->abfd, &so->sections, &so->sections_end)) |
23e04971 | 579 | { |
8a3fe4f8 | 580 | error (_("Can't find the file sections in `%s': %s"), |
192b62ce | 581 | bfd_get_filename (so->abfd), bfd_errmsg (bfd_get_error ())); |
23e04971 | 582 | } |
104c1213 | 583 | |
13437d4b | 584 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 585 | { |
13437d4b KB |
586 | /* Relocate the section binding addresses as recorded in the shared |
587 | object's file by the base address to which the object was actually | |
c378eb4e | 588 | mapped. */ |
66aba65d | 589 | ops->relocate_section_addresses (so, p); |
cfa9d6d9 DJ |
590 | |
591 | /* If the target didn't provide information about the address | |
592 | range of the shared object, assume we want the location of | |
593 | the .text section. */ | |
594 | if (so->addr_low == 0 && so->addr_high == 0 | |
595 | && strcmp (p->the_bfd_section->name, ".text") == 0) | |
13437d4b | 596 | { |
cfa9d6d9 DJ |
597 | so->addr_low = p->addr; |
598 | so->addr_high = p->endaddr; | |
13437d4b | 599 | } |
104c1213 JM |
600 | } |
601 | ||
048d532d PA |
602 | /* Add the shared object's sections to the current set of file |
603 | section tables. Do this immediately after mapping the object so | |
604 | that later nodes in the list can query this object, as is needed | |
605 | in solib-osf.c. */ | |
ed9eebaf | 606 | add_target_sections (so, so->sections, so->sections_end); |
048d532d PA |
607 | |
608 | return 1; | |
104c1213 | 609 | } |
c906108c | 610 | |
0892cb63 DE |
611 | /* Free symbol-file related contents of SO and reset for possible reloading |
612 | of SO. If we have opened a BFD for SO, close it. If we have placed SO's | |
613 | sections in some target's section table, the caller is responsible for | |
614 | removing them. | |
a86988f2 PA |
615 | |
616 | This function doesn't mess with objfiles at all. If there is an | |
617 | objfile associated with SO that needs to be removed, the caller is | |
618 | responsible for taking care of that. */ | |
619 | ||
620 | static void | |
0892cb63 | 621 | clear_so (struct so_list *so) |
a86988f2 | 622 | { |
3641da11 | 623 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
0892cb63 | 624 | |
a86988f2 PA |
625 | if (so->sections) |
626 | { | |
627 | xfree (so->sections); | |
628 | so->sections = so->sections_end = NULL; | |
629 | } | |
630 | ||
631 | gdb_bfd_unref (so->abfd); | |
632 | so->abfd = NULL; | |
633 | ||
634 | /* Our caller closed the objfile, possibly via objfile_purge_solibs. */ | |
635 | so->symbols_loaded = 0; | |
636 | so->objfile = NULL; | |
637 | ||
638 | so->addr_low = so->addr_high = 0; | |
639 | ||
640 | /* Restore the target-supplied file name. SO_NAME may be the path | |
641 | of the symbol file. */ | |
642 | strcpy (so->so_name, so->so_original_name); | |
0892cb63 DE |
643 | |
644 | /* Do the same for target-specific data. */ | |
645 | if (ops->clear_so != NULL) | |
646 | ops->clear_so (so); | |
a86988f2 PA |
647 | } |
648 | ||
7f86f058 | 649 | /* Free the storage associated with the `struct so_list' object SO. |
c378eb4e | 650 | If we have opened a BFD for SO, close it. |
c906108c | 651 | |
07cd4b97 JB |
652 | The caller is responsible for removing SO from whatever list it is |
653 | a member of. If we have placed SO's sections in some target's | |
654 | section table, the caller is responsible for removing them. | |
c906108c | 655 | |
07cd4b97 JB |
656 | This function doesn't mess with objfiles at all. If there is an |
657 | objfile associated with SO that needs to be removed, the caller is | |
658 | responsible for taking care of that. */ | |
659 | ||
13437d4b | 660 | void |
07cd4b97 | 661 | free_so (struct so_list *so) |
c906108c | 662 | { |
3641da11 | 663 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c5aa993b | 664 | |
0892cb63 | 665 | clear_so (so); |
66aba65d | 666 | ops->free_so (so); |
07cd4b97 | 667 | |
b8c9b27d | 668 | xfree (so); |
c906108c SS |
669 | } |
670 | ||
07cd4b97 | 671 | |
f8766ec1 KB |
672 | /* Return address of first so_list entry in master shared object list. */ |
673 | struct so_list * | |
674 | master_so_list (void) | |
675 | { | |
676 | return so_list_head; | |
677 | } | |
678 | ||
7eedccfa PP |
679 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
680 | be chatty about it. Return non-zero if any symbols were actually | |
42a6e6a0 MK |
681 | loaded. */ |
682 | ||
683 | int | |
b15cc25c | 684 | solib_read_symbols (struct so_list *so, symfile_add_flags flags) |
42a6e6a0 MK |
685 | { |
686 | if (so->symbols_loaded) | |
687 | { | |
a86988f2 | 688 | /* If needed, we've already warned in our caller. */ |
42a6e6a0 | 689 | } |
8bb75286 DJ |
690 | else if (so->abfd == NULL) |
691 | { | |
048d532d PA |
692 | /* We've already warned about this library, when trying to open |
693 | it. */ | |
8bb75286 | 694 | } |
42a6e6a0 MK |
695 | else |
696 | { | |
048d532d | 697 | |
7dcd53a0 TT |
698 | flags |= current_inferior ()->symfile_flags; |
699 | ||
492d29ea | 700 | TRY |
048d532d PA |
701 | { |
702 | struct section_addr_info *sap; | |
703 | ||
704 | /* Have we already loaded this shared object? */ | |
705 | ALL_OBJFILES (so->objfile) | |
706 | { | |
4262abfb | 707 | if (filename_cmp (objfile_name (so->objfile), so->so_name) == 0 |
e4f6d2ec | 708 | && so->objfile->addr_low == so->addr_low) |
048d532d PA |
709 | break; |
710 | } | |
9c6595ab PA |
711 | if (so->objfile == NULL) |
712 | { | |
713 | sap = build_section_addr_info_from_section_table (so->sections, | |
714 | so->sections_end); | |
715 | so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name, | |
716 | flags, sap, OBJF_SHARED, | |
717 | NULL); | |
718 | so->objfile->addr_low = so->addr_low; | |
719 | free_section_addr_info (sap); | |
720 | } | |
492d29ea PA |
721 | |
722 | so->symbols_loaded = 1; | |
723 | } | |
724 | CATCH (e, RETURN_MASK_ERROR) | |
725 | { | |
726 | exception_fprintf (gdb_stderr, e, _("Error while reading shared" | |
727 | " library symbols for %s:\n"), | |
728 | so->so_name); | |
048d532d | 729 | } |
492d29ea | 730 | END_CATCH |
048d532d | 731 | |
7eedccfa | 732 | return 1; |
42a6e6a0 MK |
733 | } |
734 | ||
735 | return 0; | |
736 | } | |
c906108c | 737 | |
59145f8c AR |
738 | /* Return 1 if KNOWN->objfile is used by any other so_list object in the |
739 | SO_LIST_HEAD list. Return 0 otherwise. */ | |
740 | ||
741 | static int | |
742 | solib_used (const struct so_list *const known) | |
743 | { | |
744 | const struct so_list *pivot; | |
745 | ||
746 | for (pivot = so_list_head; pivot != NULL; pivot = pivot->next) | |
747 | if (pivot != known && pivot->objfile == known->objfile) | |
748 | return 1; | |
749 | return 0; | |
750 | } | |
751 | ||
7f86f058 | 752 | /* Synchronize GDB's shared object list with inferior's. |
c906108c | 753 | |
07cd4b97 | 754 | Extract the list of currently loaded shared objects from the |
105b175f JB |
755 | inferior, and compare it with the list of shared objects currently |
756 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
757 | with the inferior's new list. | |
c906108c | 758 | |
105b175f JB |
759 | If we notice that the inferior has unloaded some shared objects, |
760 | free any symbolic info GDB had read about those shared objects. | |
761 | ||
762 | Don't load symbolic info for any new shared objects; just add them | |
763 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
764 | |
765 | If FROM_TTY is non-null, feel free to print messages about what | |
e696b3ad | 766 | we're doing. */ |
c906108c | 767 | |
e696b3ad MAL |
768 | void |
769 | update_solib_list (int from_tty) | |
07cd4b97 | 770 | { |
3641da11 | 771 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 772 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
773 | struct so_list *gdb, **gdb_link; |
774 | ||
181e7f93 PA |
775 | /* We can reach here due to changing solib-search-path or the |
776 | sysroot, before having any inferior. */ | |
50c71eaf | 777 | if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid)) |
181e7f93 PA |
778 | { |
779 | struct inferior *inf = current_inferior (); | |
780 | ||
781 | /* If we are attaching to a running process for which we | |
782 | have not opened a symbol file, we may be able to get its | |
783 | symbols now! */ | |
784 | if (inf->attach_flag && symfile_objfile == NULL) | |
785 | catch_errors (ops->open_symbol_file_object, &from_tty, | |
786 | "Error reading attached process's symbol file.\n", | |
787 | RETURN_MASK_ALL); | |
788 | } | |
104c1213 | 789 | |
07cd4b97 JB |
790 | /* GDB and the inferior's dynamic linker each maintain their own |
791 | list of currently loaded shared objects; we want to bring the | |
792 | former in sync with the latter. Scan both lists, seeing which | |
793 | shared objects appear where. There are three cases: | |
794 | ||
795 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
796 | knows about it already, and it's still loaded in the inferior. |
797 | Nothing needs to happen. | |
07cd4b97 JB |
798 | |
799 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
800 | the inferior has unloaded it. We should remove the shared |
801 | object from GDB's tables. | |
07cd4b97 JB |
802 | |
803 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
804 | means that it's just been loaded. We should add it to GDB's |
805 | tables. | |
07cd4b97 JB |
806 | |
807 | So we walk GDB's list, checking each entry to see if it appears | |
808 | in the inferior's list too. If it does, no action is needed, and | |
809 | we remove it from the inferior's list. If it doesn't, the | |
810 | inferior has unloaded it, and we remove it from GDB's list. By | |
811 | the time we're done walking GDB's list, the inferior's list | |
812 | contains only the new shared objects, which we then add. */ | |
813 | ||
814 | gdb = so_list_head; | |
815 | gdb_link = &so_list_head; | |
816 | while (gdb) | |
c906108c | 817 | { |
07cd4b97 JB |
818 | struct so_list *i = inferior; |
819 | struct so_list **i_link = &inferior; | |
820 | ||
821 | /* Check to see whether the shared object *gdb also appears in | |
822 | the inferior's current list. */ | |
823 | while (i) | |
c906108c | 824 | { |
a7c02bc8 VP |
825 | if (ops->same) |
826 | { | |
827 | if (ops->same (gdb, i)) | |
828 | break; | |
829 | } | |
830 | else | |
831 | { | |
0ba1096a | 832 | if (! filename_cmp (gdb->so_original_name, i->so_original_name)) |
a7c02bc8 VP |
833 | break; |
834 | } | |
07cd4b97 JB |
835 | |
836 | i_link = &i->next; | |
837 | i = *i_link; | |
c906108c | 838 | } |
c5aa993b | 839 | |
07cd4b97 JB |
840 | /* If the shared object appears on the inferior's list too, then |
841 | it's still loaded, so we don't need to do anything. Delete | |
842 | it from the inferior's list, and leave it on GDB's list. */ | |
843 | if (i) | |
c906108c | 844 | { |
07cd4b97 | 845 | *i_link = i->next; |
07cd4b97 JB |
846 | free_so (i); |
847 | gdb_link = &gdb->next; | |
848 | gdb = *gdb_link; | |
849 | } | |
850 | ||
851 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
852 | else | |
853 | { | |
42a6e6a0 MK |
854 | /* Notify any observer that the shared object has been |
855 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
856 | observer_notify_solib_unloaded (gdb); |
857 | ||
edcc5120 TT |
858 | VEC_safe_push (char_ptr, current_program_space->deleted_solibs, |
859 | xstrdup (gdb->so_name)); | |
860 | ||
07cd4b97 | 861 | *gdb_link = gdb->next; |
07cd4b97 JB |
862 | |
863 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
59145f8c AR |
864 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED) |
865 | && !solib_used (gdb)) | |
07cd4b97 JB |
866 | free_objfile (gdb->objfile); |
867 | ||
868 | /* Some targets' section tables might be referring to | |
869 | sections from so->abfd; remove them. */ | |
046ac79f | 870 | remove_target_sections (gdb); |
07cd4b97 JB |
871 | |
872 | free_so (gdb); | |
873 | gdb = *gdb_link; | |
c906108c SS |
874 | } |
875 | } | |
c5aa993b | 876 | |
07cd4b97 JB |
877 | /* Now the inferior's list contains only shared objects that don't |
878 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 879 | to GDB's shared object list. */ |
07cd4b97 | 880 | if (inferior) |
c906108c | 881 | { |
048d532d PA |
882 | int not_found = 0; |
883 | const char *not_found_filename = NULL; | |
884 | ||
07cd4b97 JB |
885 | struct so_list *i; |
886 | ||
887 | /* Add the new shared objects to GDB's list. */ | |
888 | *gdb_link = inferior; | |
889 | ||
e8930304 | 890 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 891 | for (i = inferior; i; i = i->next) |
c906108c | 892 | { |
048d532d | 893 | |
6c95b8df | 894 | i->pspace = current_program_space; |
edcc5120 | 895 | VEC_safe_push (so_list_ptr, current_program_space->added_solibs, i); |
07cd4b97 | 896 | |
492d29ea | 897 | TRY |
048d532d PA |
898 | { |
899 | /* Fill in the rest of the `struct so_list' node. */ | |
900 | if (!solib_map_sections (i)) | |
901 | { | |
902 | not_found++; | |
903 | if (not_found_filename == NULL) | |
904 | not_found_filename = i->so_original_name; | |
905 | } | |
906 | } | |
07cd4b97 | 907 | |
492d29ea PA |
908 | CATCH (e, RETURN_MASK_ERROR) |
909 | { | |
910 | exception_fprintf (gdb_stderr, e, | |
911 | _("Error while mapping shared " | |
912 | "library sections:\n")); | |
913 | } | |
914 | END_CATCH | |
42a6e6a0 MK |
915 | |
916 | /* Notify any observer that the shared object has been | |
048d532d | 917 | loaded now that we've added it to GDB's tables. */ |
42a6e6a0 | 918 | observer_notify_solib_loaded (i); |
c906108c | 919 | } |
048d532d PA |
920 | |
921 | /* If a library was not found, issue an appropriate warning | |
922 | message. We have to use a single call to warning in case the | |
923 | front end does something special with warnings, e.g., pop up | |
924 | a dialog box. It Would Be Nice if we could get a "warning: " | |
925 | prefix on each line in the CLI front end, though - it doesn't | |
926 | stand out well. */ | |
927 | ||
928 | if (not_found == 1) | |
3e43a32a MS |
929 | warning (_("Could not load shared library symbols for %s.\n" |
930 | "Do you need \"set solib-search-path\" " | |
931 | "or \"set sysroot\"?"), | |
048d532d PA |
932 | not_found_filename); |
933 | else if (not_found > 1) | |
934 | warning (_("\ | |
935 | Could not load shared library symbols for %d libraries, e.g. %s.\n\ | |
936 | Use the \"info sharedlibrary\" command to see the complete listing.\n\ | |
937 | Do you need \"set solib-search-path\" or \"set sysroot\"?"), | |
938 | not_found, not_found_filename); | |
e8930304 | 939 | } |
105b175f JB |
940 | } |
941 | ||
17a37d48 PP |
942 | |
943 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
944 | |
945 | Uses a fairly simplistic heuristic approach where we check | |
946 | the file name against "/libpthread". This can lead to false | |
947 | positives, but this should be good enough in practice. */ | |
948 | ||
17a37d48 PP |
949 | int |
950 | libpthread_name_p (const char *name) | |
951 | { | |
952 | return (strstr (name, "/libpthread") != NULL); | |
953 | } | |
954 | ||
955 | /* Return non-zero if SO is the libpthread shared library. */ | |
956 | ||
6612ad7f JB |
957 | static int |
958 | libpthread_solib_p (struct so_list *so) | |
959 | { | |
17a37d48 | 960 | return libpthread_name_p (so->so_name); |
6612ad7f | 961 | } |
105b175f | 962 | |
7f86f058 | 963 | /* Read in symbolic information for any shared objects whose names |
105b175f JB |
964 | match PATTERN. (If we've already read a shared object's symbol |
965 | info, leave it alone.) If PATTERN is zero, read them all. | |
966 | ||
990f9fe3 FF |
967 | If READSYMS is 0, defer reading symbolic information until later |
968 | but still do any needed low level processing. | |
969 | ||
e696b3ad | 970 | FROM_TTY is described for update_solib_list, above. */ |
105b175f JB |
971 | |
972 | void | |
e696b3ad | 973 | solib_add (const char *pattern, int from_tty, int readsyms) |
105b175f JB |
974 | { |
975 | struct so_list *gdb; | |
976 | ||
770e7fc7 DE |
977 | if (print_symbol_loading_p (from_tty, 0, 0)) |
978 | { | |
979 | if (pattern != NULL) | |
980 | { | |
981 | printf_unfiltered (_("Loading symbols for shared libraries: %s\n"), | |
982 | pattern); | |
983 | } | |
984 | else | |
985 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
986 | } | |
987 | ||
2eff07b3 PP |
988 | current_program_space->solib_add_generation++; |
989 | ||
105b175f JB |
990 | if (pattern) |
991 | { | |
992 | char *re_err = re_comp (pattern); | |
993 | ||
994 | if (re_err) | |
8a3fe4f8 | 995 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
996 | } |
997 | ||
e696b3ad | 998 | update_solib_list (from_tty); |
c906108c | 999 | |
105b175f JB |
1000 | /* Walk the list of currently loaded shared libraries, and read |
1001 | symbols for any that match the pattern --- or any whose symbols | |
1002 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
1003 | { |
1004 | int any_matches = 0; | |
1005 | int loaded_any_symbols = 0; | |
b15cc25c PA |
1006 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
1007 | ||
1008 | if (from_tty) | |
1009 | add_flags |= SYMFILE_VERBOSE; | |
c906108c | 1010 | |
e8930304 JB |
1011 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
1012 | if (! pattern || re_exec (gdb->so_name)) | |
1013 | { | |
6612ad7f JB |
1014 | /* Normally, we would read the symbols from that library |
1015 | only if READSYMS is set. However, we're making a small | |
1016 | exception for the pthread library, because we sometimes | |
1017 | need the library symbols to be loaded in order to provide | |
1018 | thread support (x86-linux for instance). */ | |
1019 | const int add_this_solib = | |
1020 | (readsyms || libpthread_solib_p (gdb)); | |
1021 | ||
e8930304 | 1022 | any_matches = 1; |
a86988f2 PA |
1023 | if (add_this_solib) |
1024 | { | |
1025 | if (gdb->symbols_loaded) | |
1026 | { | |
1027 | /* If no pattern was given, be quiet for shared | |
1028 | libraries we have already loaded. */ | |
1029 | if (pattern && (from_tty || info_verbose)) | |
1030 | printf_unfiltered (_("Symbols already loaded for %s\n"), | |
1031 | gdb->so_name); | |
1032 | } | |
b15cc25c | 1033 | else if (solib_read_symbols (gdb, add_flags)) |
a86988f2 PA |
1034 | loaded_any_symbols = 1; |
1035 | } | |
e8930304 JB |
1036 | } |
1037 | ||
7eedccfa PP |
1038 | if (loaded_any_symbols) |
1039 | breakpoint_re_set (); | |
1040 | ||
e8930304 JB |
1041 | if (from_tty && pattern && ! any_matches) |
1042 | printf_unfiltered | |
1043 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
1044 | ||
1045 | if (loaded_any_symbols) | |
1046 | { | |
1047 | /* Getting new symbols may change our opinion about what is | |
1048 | frameless. */ | |
1049 | reinit_frame_cache (); | |
e8930304 JB |
1050 | } |
1051 | } | |
c906108c SS |
1052 | } |
1053 | ||
7f86f058 PA |
1054 | /* Implement the "info sharedlibrary" command. Walk through the |
1055 | shared library list and print information about each attached | |
1056 | library matching PATTERN. If PATTERN is elided, print them | |
1057 | all. */ | |
c906108c SS |
1058 | |
1059 | static void | |
55333a84 | 1060 | info_sharedlibrary_command (char *pattern, int from_tty) |
c906108c | 1061 | { |
52f0bd74 | 1062 | struct so_list *so = NULL; /* link map state variable */ |
55333a84 | 1063 | int so_missing_debug_info = 0; |
c906108c | 1064 | int addr_width; |
55333a84 DE |
1065 | int nr_libs; |
1066 | struct cleanup *table_cleanup; | |
f5656ead | 1067 | struct gdbarch *gdbarch = target_gdbarch (); |
79a45e25 | 1068 | struct ui_out *uiout = current_uiout; |
55333a84 DE |
1069 | |
1070 | if (pattern) | |
1071 | { | |
1072 | char *re_err = re_comp (pattern); | |
1073 | ||
1074 | if (re_err) | |
1075 | error (_("Invalid regexp: %s"), re_err); | |
1076 | } | |
c906108c | 1077 | |
84eb3c4f | 1078 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
55333a84 | 1079 | addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4); |
c906108c | 1080 | |
e696b3ad | 1081 | update_solib_list (from_tty); |
07cd4b97 | 1082 | |
55333a84 DE |
1083 | /* make_cleanup_ui_out_table_begin_end needs to know the number of |
1084 | rows, so we need to make two passes over the libs. */ | |
1085 | ||
1086 | for (nr_libs = 0, so = so_list_head; so; so = so->next) | |
c906108c | 1087 | { |
c5aa993b | 1088 | if (so->so_name[0]) |
c906108c | 1089 | { |
55333a84 DE |
1090 | if (pattern && ! re_exec (so->so_name)) |
1091 | continue; | |
1092 | ++nr_libs; | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | table_cleanup = | |
1097 | make_cleanup_ui_out_table_begin_end (uiout, 4, nr_libs, | |
1098 | "SharedLibraryTable"); | |
1099 | ||
1100 | /* The "- 1" is because ui_out adds one space between columns. */ | |
112e8700 SM |
1101 | uiout->table_header (addr_width - 1, ui_left, "from", "From"); |
1102 | uiout->table_header (addr_width - 1, ui_left, "to", "To"); | |
1103 | uiout->table_header (12 - 1, ui_left, "syms-read", "Syms Read"); | |
1104 | uiout->table_header (0, ui_noalign, "name", "Shared Object Library"); | |
55333a84 | 1105 | |
112e8700 | 1106 | uiout->table_body (); |
55333a84 DE |
1107 | |
1108 | for (so = so_list_head; so; so = so->next) | |
1109 | { | |
1110 | struct cleanup *lib_cleanup; | |
c906108c | 1111 | |
55333a84 DE |
1112 | if (! so->so_name[0]) |
1113 | continue; | |
1114 | if (pattern && ! re_exec (so->so_name)) | |
1115 | continue; | |
1116 | ||
1117 | lib_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "lib"); | |
1118 | ||
1119 | if (so->addr_high != 0) | |
1120 | { | |
112e8700 SM |
1121 | uiout->field_core_addr ("from", gdbarch, so->addr_low); |
1122 | uiout->field_core_addr ("to", gdbarch, so->addr_high); | |
55333a84 DE |
1123 | } |
1124 | else | |
1125 | { | |
112e8700 SM |
1126 | uiout->field_skip ("from"); |
1127 | uiout->field_skip ("to"); | |
c906108c | 1128 | } |
55333a84 | 1129 | |
112e8700 | 1130 | if (! interp_ui_out (top_level_interpreter ())->is_mi_like_p () |
55333a84 | 1131 | && so->symbols_loaded |
e0ae4240 | 1132 | && !objfile_has_symbols (so->objfile)) |
55333a84 DE |
1133 | { |
1134 | so_missing_debug_info = 1; | |
112e8700 | 1135 | uiout->field_string ("syms-read", "Yes (*)"); |
55333a84 DE |
1136 | } |
1137 | else | |
112e8700 | 1138 | uiout->field_string ("syms-read", so->symbols_loaded ? "Yes" : "No"); |
55333a84 | 1139 | |
112e8700 | 1140 | uiout->field_string ("name", so->so_name); |
55333a84 | 1141 | |
112e8700 | 1142 | uiout->text ("\n"); |
55333a84 DE |
1143 | |
1144 | do_cleanups (lib_cleanup); | |
c906108c | 1145 | } |
55333a84 DE |
1146 | |
1147 | do_cleanups (table_cleanup); | |
1148 | ||
1149 | if (nr_libs == 0) | |
1150 | { | |
1151 | if (pattern) | |
112e8700 | 1152 | uiout->message (_("No shared libraries matched.\n")); |
55333a84 | 1153 | else |
112e8700 | 1154 | uiout->message (_("No shared libraries loaded at this time.\n")); |
55333a84 DE |
1155 | } |
1156 | else | |
c906108c | 1157 | { |
55333a84 | 1158 | if (so_missing_debug_info) |
112e8700 | 1159 | uiout->message (_("(*): Shared library is missing " |
3e43a32a | 1160 | "debugging information.\n")); |
c906108c SS |
1161 | } |
1162 | } | |
1163 | ||
5fd1a349 PP |
1164 | /* Return 1 if ADDRESS lies within SOLIB. */ |
1165 | ||
1166 | int | |
1167 | solib_contains_address_p (const struct so_list *const solib, | |
1168 | CORE_ADDR address) | |
1169 | { | |
0542c86d | 1170 | struct target_section *p; |
5fd1a349 PP |
1171 | |
1172 | for (p = solib->sections; p < solib->sections_end; p++) | |
1173 | if (p->addr <= address && address < p->endaddr) | |
1174 | return 1; | |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
7f86f058 PA |
1179 | /* If ADDRESS is in a shared lib in program space PSPACE, return its |
1180 | name. | |
c906108c | 1181 | |
7f86f058 PA |
1182 | Provides a hook for other gdb routines to discover whether or not a |
1183 | particular address is within the mapped address space of a shared | |
1184 | library. | |
c906108c | 1185 | |
c5aa993b JM |
1186 | For example, this routine is called at one point to disable |
1187 | breakpoints which are in shared libraries that are not currently | |
7f86f058 | 1188 | mapped in. */ |
c906108c SS |
1189 | |
1190 | char * | |
6c95b8df | 1191 | solib_name_from_address (struct program_space *pspace, CORE_ADDR address) |
c906108c | 1192 | { |
6c95b8df | 1193 | struct so_list *so = NULL; |
c5aa993b | 1194 | |
6c95b8df | 1195 | for (so = pspace->so_list; so; so = so->next) |
5fd1a349 PP |
1196 | if (solib_contains_address_p (so, address)) |
1197 | return (so->so_name); | |
07cd4b97 | 1198 | |
c906108c SS |
1199 | return (0); |
1200 | } | |
1201 | ||
de18c1d8 JM |
1202 | /* Return whether the data starting at VADDR, size SIZE, must be kept |
1203 | in a core file for shared libraries loaded before "gcore" is used | |
1204 | to be handled correctly when the core file is loaded. This only | |
1205 | applies when the section would otherwise not be kept in the core | |
1206 | file (in particular, for readonly sections). */ | |
1207 | ||
1208 | int | |
1209 | solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size) | |
1210 | { | |
3641da11 | 1211 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
de18c1d8 JM |
1212 | |
1213 | if (ops->keep_data_in_core) | |
1214 | return ops->keep_data_in_core (vaddr, size); | |
1215 | else | |
1216 | return 0; | |
1217 | } | |
1218 | ||
c906108c SS |
1219 | /* Called by free_all_symtabs */ |
1220 | ||
c5aa993b | 1221 | void |
fba45db2 | 1222 | clear_solib (void) |
c906108c | 1223 | { |
3641da11 | 1224 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 1225 | |
1736a7bd | 1226 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 1227 | |
c906108c SS |
1228 | while (so_list_head) |
1229 | { | |
07cd4b97 | 1230 | struct so_list *so = so_list_head; |
433759f7 | 1231 | |
07cd4b97 | 1232 | so_list_head = so->next; |
c86cf029 | 1233 | observer_notify_solib_unloaded (so); |
046ac79f | 1234 | remove_target_sections (so); |
07cd4b97 | 1235 | free_so (so); |
c906108c | 1236 | } |
07cd4b97 | 1237 | |
66aba65d | 1238 | ops->clear_solib (); |
c906108c SS |
1239 | } |
1240 | ||
7f86f058 PA |
1241 | /* Shared library startup support. When GDB starts up the inferior, |
1242 | it nurses it along (through the shell) until it is ready to execute | |
1243 | its first instruction. At this point, this function gets | |
1244 | called. */ | |
c5aa993b JM |
1245 | |
1246 | void | |
268a4a75 | 1247 | solib_create_inferior_hook (int from_tty) |
c906108c | 1248 | { |
3641da11 | 1249 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1250 | |
268a4a75 | 1251 | ops->solib_create_inferior_hook (from_tty); |
c906108c SS |
1252 | } |
1253 | ||
7f86f058 PA |
1254 | /* Check to see if an address is in the dynamic loader's dynamic |
1255 | symbol resolution code. Return 1 if so, 0 otherwise. */ | |
d7fa2ae2 KB |
1256 | |
1257 | int | |
1258 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
1259 | { | |
3641da11 | 1260 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1261 | |
66aba65d | 1262 | return ops->in_dynsym_resolve_code (pc); |
d7fa2ae2 | 1263 | } |
c906108c | 1264 | |
7f86f058 | 1265 | /* Implements the "sharedlibrary" command. */ |
c906108c SS |
1266 | |
1267 | static void | |
fba45db2 | 1268 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
1269 | { |
1270 | dont_repeat (); | |
e696b3ad | 1271 | solib_add (args, from_tty, 1); |
c906108c SS |
1272 | } |
1273 | ||
7f86f058 | 1274 | /* Implements the command "nosharedlibrary", which discards symbols |
cb0ba49e MS |
1275 | that have been auto-loaded from shared libraries. Symbols from |
1276 | shared libraries that were added by explicit request of the user | |
1277 | are not discarded. Also called from remote.c. */ | |
1278 | ||
c60a7562 MS |
1279 | void |
1280 | no_shared_libraries (char *ignored, int from_tty) | |
1281 | { | |
a3247a22 PP |
1282 | /* The order of the two routines below is important: clear_solib notifies |
1283 | the solib_unloaded observers, and some of these observers might need | |
1284 | access to their associated objfiles. Therefore, we can not purge the | |
1285 | solibs' objfiles before clear_solib has been called. */ | |
1286 | ||
615b9dba | 1287 | clear_solib (); |
a3247a22 | 1288 | objfile_purge_solibs (); |
c60a7562 | 1289 | } |
c906108c | 1290 | |
f9e14852 GB |
1291 | /* See solib.h. */ |
1292 | ||
1293 | void | |
1294 | update_solib_breakpoints (void) | |
1295 | { | |
1296 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1297 | ||
1298 | if (ops->update_breakpoints != NULL) | |
1299 | ops->update_breakpoints (); | |
1300 | } | |
1301 | ||
1302 | /* See solib.h. */ | |
1303 | ||
1304 | void | |
1305 | handle_solib_event (void) | |
1306 | { | |
1307 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1308 | ||
1309 | if (ops->handle_event != NULL) | |
1310 | ops->handle_event (); | |
1311 | ||
1312 | clear_program_space_solib_cache (current_inferior ()->pspace); | |
1313 | ||
1314 | /* Check for any newly added shared libraries if we're supposed to | |
1315 | be adding them automatically. Switch terminal for any messages | |
1316 | produced by breakpoint_re_set. */ | |
1317 | target_terminal_ours_for_output (); | |
e696b3ad | 1318 | solib_add (NULL, 0, auto_solib_add); |
f9e14852 GB |
1319 | target_terminal_inferior (); |
1320 | } | |
1321 | ||
a86988f2 PA |
1322 | /* Reload shared libraries, but avoid reloading the same symbol file |
1323 | we already have loaded. */ | |
1324 | ||
1325 | static void | |
1326 | reload_shared_libraries_1 (int from_tty) | |
1327 | { | |
1328 | struct so_list *so; | |
1329 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); | |
1330 | ||
770e7fc7 DE |
1331 | if (print_symbol_loading_p (from_tty, 0, 0)) |
1332 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
1333 | ||
a86988f2 PA |
1334 | for (so = so_list_head; so != NULL; so = so->next) |
1335 | { | |
1336 | char *filename, *found_pathname = NULL; | |
a86988f2 | 1337 | int was_loaded = so->symbols_loaded; |
b15cc25c PA |
1338 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
1339 | ||
1340 | if (from_tty) | |
1341 | add_flags |= SYMFILE_VERBOSE; | |
a86988f2 PA |
1342 | |
1343 | filename = tilde_expand (so->so_original_name); | |
42b1321c | 1344 | make_cleanup (xfree, filename); |
192b62ce | 1345 | gdb_bfd_ref_ptr abfd (solib_bfd_open (filename)); |
a86988f2 PA |
1346 | if (abfd != NULL) |
1347 | { | |
192b62ce | 1348 | found_pathname = xstrdup (bfd_get_filename (abfd.get ())); |
a86988f2 | 1349 | make_cleanup (xfree, found_pathname); |
a86988f2 PA |
1350 | } |
1351 | ||
1352 | /* If this shared library is no longer associated with its previous | |
1353 | symbol file, close that. */ | |
1354 | if ((found_pathname == NULL && was_loaded) | |
1355 | || (found_pathname != NULL | |
0ba1096a | 1356 | && filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1357 | { |
59145f8c AR |
1358 | if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED) |
1359 | && !solib_used (so)) | |
a86988f2 | 1360 | free_objfile (so->objfile); |
046ac79f | 1361 | remove_target_sections (so); |
0892cb63 | 1362 | clear_so (so); |
a86988f2 PA |
1363 | } |
1364 | ||
1365 | /* If this shared library is now associated with a new symbol | |
1366 | file, open it. */ | |
1367 | if (found_pathname != NULL | |
1368 | && (!was_loaded | |
0ba1096a | 1369 | || filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1370 | { |
492d29ea | 1371 | int got_error = 0; |
a86988f2 | 1372 | |
492d29ea PA |
1373 | TRY |
1374 | { | |
1375 | solib_map_sections (so); | |
1376 | } | |
1377 | ||
1378 | CATCH (e, RETURN_MASK_ERROR) | |
1379 | { | |
1380 | exception_fprintf (gdb_stderr, e, | |
1381 | _("Error while mapping " | |
1382 | "shared library sections:\n")); | |
1383 | got_error = 1; | |
1384 | } | |
1385 | END_CATCH | |
a86988f2 | 1386 | |
492d29ea PA |
1387 | if (!got_error |
1388 | && (auto_solib_add || was_loaded || libpthread_solib_p (so))) | |
b15cc25c | 1389 | solib_read_symbols (so, add_flags); |
a86988f2 PA |
1390 | } |
1391 | } | |
1392 | ||
1393 | do_cleanups (old_chain); | |
1394 | } | |
1395 | ||
cf466558 | 1396 | static void |
f397e303 AC |
1397 | reload_shared_libraries (char *ignored, int from_tty, |
1398 | struct cmd_list_element *e) | |
cf466558 | 1399 | { |
3641da11 | 1400 | const struct target_so_ops *ops; |
a86988f2 PA |
1401 | |
1402 | reload_shared_libraries_1 (from_tty); | |
1403 | ||
f5656ead | 1404 | ops = solib_ops (target_gdbarch ()); |
a86988f2 | 1405 | |
c378eb4e | 1406 | /* Creating inferior hooks here has two purposes. First, if we reload |
c8fa6cdd VP |
1407 | shared libraries then the address of solib breakpoint we've computed |
1408 | previously might be no longer valid. For example, if we forgot to set | |
1409 | solib-absolute-prefix and are setting it right now, then the previous | |
1410 | breakpoint address is plain wrong. Second, installing solib hooks | |
1411 | also implicitly figures were ld.so is and loads symbols for it. | |
1412 | Absent this call, if we've just connected to a target and set | |
1413 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1414 | about ld.so. */ | |
1415 | if (target_has_execution) | |
1416 | { | |
a86988f2 PA |
1417 | /* Reset or free private data structures not associated with |
1418 | so_list entries. */ | |
1419 | ops->clear_solib (); | |
1420 | ||
1421 | /* Remove any previous solib event breakpoint. This is usually | |
1422 | done in common code, at breakpoint_init_inferior time, but | |
1423 | we're not really starting up the inferior here. */ | |
1424 | remove_solib_event_breakpoints (); | |
1425 | ||
268a4a75 | 1426 | solib_create_inferior_hook (from_tty); |
c8fa6cdd | 1427 | } |
268a4a75 JK |
1428 | |
1429 | /* Sometimes the platform-specific hook loads initial shared | |
1430 | libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be | |
1431 | incorrectly 0 but such solib targets should be fixed anyway. If we | |
1432 | made all the inferior hook methods consistent, this call could be | |
1433 | removed. Call it only after the solib target has been initialized by | |
1434 | solib_create_inferior_hook. */ | |
1435 | ||
e696b3ad | 1436 | solib_add (NULL, 0, auto_solib_add); |
268a4a75 | 1437 | |
a86988f2 PA |
1438 | breakpoint_re_set (); |
1439 | ||
1440 | /* We may have loaded or unloaded debug info for some (or all) | |
1441 | shared libraries. However, frames may still reference them. For | |
1442 | example, a frame's unwinder might still point at DWARF FDE | |
1443 | structures that are now freed. Also, getting new symbols may | |
1444 | change our opinion about what is frameless. */ | |
c8fa6cdd | 1445 | reinit_frame_cache (); |
cf466558 KB |
1446 | } |
1447 | ||
2938e6cf GB |
1448 | /* Wrapper for reload_shared_libraries that replaces "remote:" |
1449 | at the start of gdb_sysroot with "target:". */ | |
1450 | ||
1451 | static void | |
1452 | gdb_sysroot_changed (char *ignored, int from_tty, | |
1453 | struct cmd_list_element *e) | |
1454 | { | |
1455 | const char *old_prefix = "remote:"; | |
1456 | const char *new_prefix = TARGET_SYSROOT_PREFIX; | |
1457 | ||
1458 | if (startswith (gdb_sysroot, old_prefix)) | |
1459 | { | |
1460 | static int warning_issued = 0; | |
1461 | ||
1462 | gdb_assert (strlen (old_prefix) == strlen (new_prefix)); | |
1463 | memcpy (gdb_sysroot, new_prefix, strlen (new_prefix)); | |
1464 | ||
1465 | if (!warning_issued) | |
1466 | { | |
1467 | warning (_("\"%s\" is deprecated, use \"%s\" instead."), | |
1468 | old_prefix, new_prefix); | |
1469 | warning (_("sysroot set to \"%s\"."), gdb_sysroot); | |
1470 | ||
1471 | warning_issued = 1; | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | reload_shared_libraries (ignored, from_tty, e); | |
1476 | } | |
1477 | ||
920d2a44 AC |
1478 | static void |
1479 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1480 | struct cmd_list_element *c, const char *value) | |
1481 | { | |
1482 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
1483 | value); | |
1484 | } | |
1485 | ||
1486 | ||
3a40aaa0 UW |
1487 | /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call |
1488 | the library-specific handler if it is installed for the current target. */ | |
1489 | ||
d12307c1 | 1490 | struct block_symbol |
efad9b6a | 1491 | solib_global_lookup (struct objfile *objfile, |
3a40aaa0 | 1492 | const char *name, |
21b556f4 | 1493 | const domain_enum domain) |
3a40aaa0 | 1494 | { |
6f059256 | 1495 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
3a40aaa0 | 1496 | |
e8a92f7b | 1497 | if (ops->lookup_lib_global_symbol != NULL) |
94af9270 | 1498 | return ops->lookup_lib_global_symbol (objfile, name, domain); |
d12307c1 | 1499 | return (struct block_symbol) {NULL, NULL}; |
3a40aaa0 UW |
1500 | } |
1501 | ||
cb457ae2 YQ |
1502 | /* Lookup the value for a specific symbol from dynamic symbol table. Look |
1503 | up symbol from ABFD. MATCH_SYM is a callback function to determine | |
1504 | whether to pick up a symbol. DATA is the input of this callback | |
1505 | function. Return NULL if symbol is not found. */ | |
1506 | ||
1507 | CORE_ADDR | |
1508 | gdb_bfd_lookup_symbol_from_symtab (bfd *abfd, | |
3953f15c SM |
1509 | int (*match_sym) (const asymbol *, |
1510 | const void *), | |
1511 | const void *data) | |
cb457ae2 YQ |
1512 | { |
1513 | long storage_needed = bfd_get_symtab_upper_bound (abfd); | |
1514 | CORE_ADDR symaddr = 0; | |
1515 | ||
1516 | if (storage_needed > 0) | |
1517 | { | |
1518 | unsigned int i; | |
1519 | ||
1520 | asymbol **symbol_table = (asymbol **) xmalloc (storage_needed); | |
1521 | struct cleanup *back_to = make_cleanup (xfree, symbol_table); | |
1522 | unsigned int number_of_symbols = | |
1523 | bfd_canonicalize_symtab (abfd, symbol_table); | |
1524 | ||
1525 | for (i = 0; i < number_of_symbols; i++) | |
1526 | { | |
1527 | asymbol *sym = *symbol_table++; | |
1528 | ||
1529 | if (match_sym (sym, data)) | |
1530 | { | |
3e29f34a MR |
1531 | struct gdbarch *gdbarch = target_gdbarch (); |
1532 | symaddr = sym->value; | |
1533 | ||
1534 | /* Some ELF targets fiddle with addresses of symbols they | |
1535 | consider special. They use minimal symbols to do that | |
1536 | and this is needed for correct breakpoint placement, | |
1537 | but we do not have full data here to build a complete | |
1538 | minimal symbol, so just set the address and let the | |
1539 | targets cope with that. */ | |
1540 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
1541 | && gdbarch_elf_make_msymbol_special_p (gdbarch)) | |
1542 | { | |
1543 | struct minimal_symbol msym; | |
1544 | ||
1545 | memset (&msym, 0, sizeof (msym)); | |
1546 | SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr); | |
1547 | gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym); | |
1548 | symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym); | |
1549 | } | |
1550 | ||
cb457ae2 | 1551 | /* BFD symbols are section relative. */ |
3e29f34a | 1552 | symaddr += sym->section->vma; |
cb457ae2 YQ |
1553 | break; |
1554 | } | |
1555 | } | |
1556 | do_cleanups (back_to); | |
1557 | } | |
1558 | ||
1559 | return symaddr; | |
1560 | } | |
1561 | ||
1562 | /* Lookup the value for a specific symbol from symbol table. Look up symbol | |
1563 | from ABFD. MATCH_SYM is a callback function to determine whether to pick | |
1564 | up a symbol. DATA is the input of this callback function. Return NULL | |
1565 | if symbol is not found. */ | |
1566 | ||
1567 | static CORE_ADDR | |
1568 | bfd_lookup_symbol_from_dyn_symtab (bfd *abfd, | |
3953f15c SM |
1569 | int (*match_sym) (const asymbol *, |
1570 | const void *), | |
1571 | const void *data) | |
cb457ae2 YQ |
1572 | { |
1573 | long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd); | |
1574 | CORE_ADDR symaddr = 0; | |
1575 | ||
1576 | if (storage_needed > 0) | |
1577 | { | |
1578 | unsigned int i; | |
1579 | asymbol **symbol_table = (asymbol **) xmalloc (storage_needed); | |
1580 | struct cleanup *back_to = make_cleanup (xfree, symbol_table); | |
1581 | unsigned int number_of_symbols = | |
1582 | bfd_canonicalize_dynamic_symtab (abfd, symbol_table); | |
1583 | ||
1584 | for (i = 0; i < number_of_symbols; i++) | |
1585 | { | |
1586 | asymbol *sym = *symbol_table++; | |
1587 | ||
1588 | if (match_sym (sym, data)) | |
1589 | { | |
1590 | /* BFD symbols are section relative. */ | |
1591 | symaddr = sym->value + sym->section->vma; | |
1592 | break; | |
1593 | } | |
1594 | } | |
1595 | do_cleanups (back_to); | |
1596 | } | |
1597 | return symaddr; | |
1598 | } | |
1599 | ||
1600 | /* Lookup the value for a specific symbol from symbol table and dynamic | |
1601 | symbol table. Look up symbol from ABFD. MATCH_SYM is a callback | |
1602 | function to determine whether to pick up a symbol. DATA is the | |
1603 | input of this callback function. Return NULL if symbol is not | |
1604 | found. */ | |
1605 | ||
1606 | CORE_ADDR | |
1607 | gdb_bfd_lookup_symbol (bfd *abfd, | |
3953f15c SM |
1608 | int (*match_sym) (const asymbol *, const void *), |
1609 | const void *data) | |
cb457ae2 YQ |
1610 | { |
1611 | CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data); | |
1612 | ||
1613 | /* On FreeBSD, the dynamic linker is stripped by default. So we'll | |
1614 | have to check the dynamic string table too. */ | |
1615 | if (symaddr == 0) | |
1616 | symaddr = bfd_lookup_symbol_from_dyn_symtab (abfd, match_sym, data); | |
1617 | ||
1618 | return symaddr; | |
1619 | } | |
3a40aaa0 | 1620 | |
63644780 NB |
1621 | /* SO_LIST_HEAD may contain user-loaded object files that can be removed |
1622 | out-of-band by the user. So upon notification of free_objfile remove | |
1623 | all references to any user-loaded file that is about to be freed. */ | |
1624 | ||
1625 | static void | |
1626 | remove_user_added_objfile (struct objfile *objfile) | |
1627 | { | |
1628 | struct so_list *so; | |
1629 | ||
1630 | if (objfile != 0 && objfile->flags & OBJF_USERLOADED) | |
1631 | { | |
1632 | for (so = so_list_head; so != NULL; so = so->next) | |
1633 | if (so->objfile == objfile) | |
1634 | so->objfile = NULL; | |
1635 | } | |
1636 | } | |
1637 | ||
a78f21af AC |
1638 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
1639 | ||
c906108c | 1640 | void |
fba45db2 | 1641 | _initialize_solib (void) |
c906108c | 1642 | { |
66aba65d MK |
1643 | solib_data = gdbarch_data_register_pre_init (solib_init); |
1644 | ||
63644780 NB |
1645 | observer_attach_free_objfile (remove_user_added_objfile); |
1646 | ||
c906108c | 1647 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1648 | _("Load shared object library symbols for files matching REGEXP.")); |
c5aa993b | 1649 | add_info ("sharedlibrary", info_sharedlibrary_command, |
1bedd215 | 1650 | _("Status of loaded shared object libraries.")); |
b30a0bc3 | 1651 | add_info_alias ("dll", "sharedlibrary", 1); |
c60a7562 | 1652 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1653 | _("Unload all shared object library symbols.")); |
c906108c | 1654 | |
5bf193a2 AC |
1655 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1656 | &auto_solib_add, _("\ | |
1657 | Set autoloading of shared library symbols."), _("\ | |
1658 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1659 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1660 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1661 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
3e43a32a MS |
1662 | inferior. Otherwise, symbols must be loaded manually, using \ |
1663 | `sharedlibrary'."), | |
5bf193a2 | 1664 | NULL, |
920d2a44 | 1665 | show_auto_solib_add, |
5bf193a2 | 1666 | &setlist, &showlist); |
c906108c | 1667 | |
811a659a GB |
1668 | add_setshow_optional_filename_cmd ("sysroot", class_support, |
1669 | &gdb_sysroot, _("\ | |
f822c95b DJ |
1670 | Set an alternate system root."), _("\ |
1671 | Show the current system root."), _("\ | |
1672 | The system root is used to load absolute shared library symbol files.\n\ | |
1673 | For other (relative) files, you can add directories using\n\ | |
1674 | `set solib-search-path'."), | |
2938e6cf | 1675 | gdb_sysroot_changed, |
811a659a GB |
1676 | NULL, |
1677 | &setlist, &showlist); | |
c906108c | 1678 | |
f822c95b DJ |
1679 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, |
1680 | &setlist); | |
1681 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, | |
1682 | &showlist); | |
030292b7 | 1683 | |
525226b5 AC |
1684 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1685 | &solib_search_path, _("\ | |
3e43a32a MS |
1686 | Set the search path for loading non-absolute shared library symbol files."), |
1687 | _("\ | |
1688 | Show the search path for loading non-absolute shared library symbol files."), | |
1689 | _("\ | |
1690 | This takes precedence over the environment variables \ | |
1691 | PATH and LD_LIBRARY_PATH."), | |
525226b5 | 1692 | reload_shared_libraries, |
920d2a44 | 1693 | show_solib_search_path, |
525226b5 | 1694 | &setlist, &showlist); |
c906108c | 1695 | } |