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 | ||
7f86f058 PA |
115 | /* Returns the full pathname of the shared library file, or NULL if |
116 | not found. (The pathname is malloc'ed; it needs to be freed by the | |
117 | caller.) *FD is set to either -1 or an open file handle for the | |
118 | library. | |
e4f7b8c8 | 119 | |
f822c95b | 120 | Global variable GDB_SYSROOT is used as a prefix directory |
e4f7b8c8 | 121 | to search for shared libraries if they have an absolute path. |
b57fbfba GB |
122 | If GDB_SYSROOT starts with "target:" and target filesystem |
123 | is the local filesystem then the "target:" prefix will be | |
124 | stripped before the search starts. This ensures that the | |
125 | same search algorithm is used for local files regardless of | |
126 | whether a "target:" prefix was used. | |
e4f7b8c8 MS |
127 | |
128 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
129 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
b57fbfba GB |
130 | shared libraries if not found in either the sysroot (if set) or |
131 | the local filesystem. | |
e4f7b8c8 | 132 | |
c8c18e65 | 133 | Search algorithm: |
b57fbfba GB |
134 | * If a sysroot is set and path is absolute: |
135 | * Search for sysroot/path. | |
c8c18e65 KW |
136 | * else |
137 | * Look for it literally (unmodified). | |
e4f7b8c8 | 138 | * Look in SOLIB_SEARCH_PATH. |
f43caff8 | 139 | * If available, use target defined search function. |
b57fbfba | 140 | * If NO sysroot is set, perform the following two searches: |
c8c18e65 KW |
141 | * Look in inferior's $PATH. |
142 | * Look in inferior's $LD_LIBRARY_PATH. | |
ab38a727 | 143 | * |
c8c18e65 | 144 | * The last check avoids doing this search when targetting remote |
b57fbfba | 145 | * machines since a sysroot will almost always be set. |
7f86f058 | 146 | */ |
e4f7b8c8 | 147 | |
572d275c UW |
148 | char * |
149 | solib_find (char *in_pathname, int *fd) | |
e4f7b8c8 | 150 | { |
3641da11 | 151 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
e4f7b8c8 MS |
152 | int found_file = -1; |
153 | char *temp_pathname = NULL; | |
08105857 | 154 | const char *solib_symbols_extension |
f5656ead | 155 | = gdbarch_solib_symbols_extension (target_gdbarch ()); |
ab38a727 PA |
156 | const char *fskind = effective_target_file_system_kind (); |
157 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); | |
b57fbfba | 158 | char *sysroot = gdb_sysroot; |
08105857 PA |
159 | |
160 | /* If solib_symbols_extension is set, replace the file's | |
161 | extension. */ | |
162 | if (solib_symbols_extension) | |
163 | { | |
164 | char *p = in_pathname + strlen (in_pathname); | |
433759f7 | 165 | |
08105857 PA |
166 | while (p > in_pathname && *p != '.') |
167 | p--; | |
168 | ||
169 | if (*p == '.') | |
170 | { | |
171 | char *new_pathname; | |
172 | ||
173 | new_pathname = alloca (p - in_pathname + 1 | |
174 | + strlen (solib_symbols_extension) + 1); | |
175 | memcpy (new_pathname, in_pathname, p - in_pathname + 1); | |
176 | strcpy (new_pathname + (p - in_pathname) + 1, | |
177 | solib_symbols_extension); | |
178 | ||
179 | in_pathname = new_pathname; | |
180 | } | |
181 | } | |
58dc52c3 | 182 | |
b57fbfba GB |
183 | if (sysroot != NULL) |
184 | { | |
185 | /* If the absolute prefix starts with "target:" but the | |
186 | filesystem accessed by the target_fileio_* methods | |
187 | is the local filesystem then we strip the "target:" | |
188 | prefix now and work with the local filesystem. This | |
189 | ensures that the same search algorithm is used for | |
190 | all local files regardless of whether a "target:" | |
191 | prefix was used. */ | |
192 | if (is_target_filename (sysroot) && target_filesystem_is_local ()) | |
193 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
194 | ||
195 | if (*sysroot == '\0') | |
196 | sysroot = NULL; | |
197 | } | |
e4f7b8c8 | 198 | |
b57fbfba | 199 | if (sysroot != NULL) |
e4f7b8c8 | 200 | { |
b57fbfba | 201 | int prefix_len = strlen (sysroot); |
f1d10cfb AS |
202 | |
203 | /* Remove trailing slashes from absolute prefix. */ | |
204 | while (prefix_len > 0 | |
b57fbfba | 205 | && IS_DIR_SEPARATOR (sysroot[prefix_len - 1])) |
f1d10cfb AS |
206 | prefix_len--; |
207 | ||
b57fbfba | 208 | sysroot = savestring (sysroot, prefix_len); |
ab38a727 PA |
209 | make_cleanup (xfree, sysroot); |
210 | } | |
211 | ||
212 | /* If we're on a non-DOS-based system, backslashes won't be | |
213 | understood as directory separator, so, convert them to forward | |
214 | slashes, iff we're supposed to handle DOS-based file system | |
215 | semantics for target paths. */ | |
216 | if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based) | |
217 | { | |
218 | char *p; | |
219 | ||
220 | /* Avoid clobbering our input. */ | |
221 | p = alloca (strlen (in_pathname) + 1); | |
222 | strcpy (p, in_pathname); | |
223 | in_pathname = p; | |
224 | ||
225 | for (; *p; p++) | |
226 | { | |
227 | if (*p == '\\') | |
228 | *p = '/'; | |
229 | } | |
230 | } | |
231 | ||
232 | /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not | |
233 | IS_ABSOLUTE_PATH. The latter is for host paths only, while | |
234 | IN_PATHNAME is a target path. For example, if we're supposed to | |
235 | be handling DOS-like semantics we want to consider a | |
236 | 'c:/foo/bar.dll' path as an absolute path, even on a Unix box. | |
237 | With such a path, before giving up on the sysroot, we'll try: | |
238 | ||
239 | 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll | |
240 | 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll | |
241 | 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll | |
242 | */ | |
243 | ||
b57fbfba | 244 | if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL) |
ab38a727 PA |
245 | temp_pathname = xstrdup (in_pathname); |
246 | else | |
247 | { | |
248 | int need_dir_separator; | |
249 | ||
3736004f PA |
250 | /* Concatenate the sysroot and the target reported filename. We |
251 | may need to glue them with a directory separator. Cases to | |
252 | consider: | |
253 | ||
254 | | sysroot | separator | in_pathname | | |
255 | |-----------------+-----------+----------------| | |
256 | | /some/dir | / | c:/foo/bar.dll | | |
257 | | /some/dir | | /foo/bar.dll | | |
2938e6cf GB |
258 | | target: | | c:/foo/bar.dll | |
259 | | target: | | /foo/bar.dll | | |
260 | | target:some/dir | / | c:/foo/bar.dll | | |
261 | | target:some/dir | | /foo/bar.dll | | |
3736004f PA |
262 | |
263 | IOW, we don't need to add a separator if IN_PATHNAME already | |
2938e6cf | 264 | has one, or when the the sysroot is exactly "target:". |
3736004f PA |
265 | There's no need to check for drive spec explicitly, as we only |
266 | get here if IN_PATHNAME is considered an absolute path. */ | |
267 | need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0]) | |
2938e6cf | 268 | || strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0); |
ab38a727 | 269 | |
f1d10cfb | 270 | /* Cat the prefixed pathname together. */ |
ab38a727 PA |
271 | temp_pathname = concat (sysroot, |
272 | need_dir_separator ? SLASH_STRING : "", | |
273 | in_pathname, (char *) NULL); | |
e4f7b8c8 MS |
274 | } |
275 | ||
2938e6cf GB |
276 | /* Handle files to be accessed via the target. */ |
277 | if (is_target_filename (temp_pathname)) | |
f1838a98 | 278 | { |
572d275c | 279 | *fd = -1; |
f748fb40 | 280 | do_cleanups (old_chain); |
ab38a727 | 281 | return temp_pathname; |
f1838a98 UW |
282 | } |
283 | ||
f1d10cfb | 284 | /* Now see if we can open it. */ |
614c279d | 285 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
286 | if (found_file < 0) |
287 | xfree (temp_pathname); | |
288 | ||
289 | /* If the search in gdb_sysroot failed, and the path name has a | |
290 | drive spec (e.g, c:/foo), try stripping ':' from the drive spec, | |
291 | and retrying in the sysroot: | |
292 | c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */ | |
f1d10cfb | 293 | |
ab38a727 | 294 | if (found_file < 0 |
b57fbfba | 295 | && sysroot != NULL |
ab38a727 PA |
296 | && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname)) |
297 | { | |
298 | int need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]); | |
299 | char *drive = savestring (in_pathname, 1); | |
300 | ||
301 | temp_pathname = concat (sysroot, | |
302 | SLASH_STRING, | |
303 | drive, | |
304 | need_dir_separator ? SLASH_STRING : "", | |
305 | in_pathname + 2, (char *) NULL); | |
306 | xfree (drive); | |
307 | ||
614c279d | 308 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
309 | if (found_file < 0) |
310 | { | |
ab38a727 PA |
311 | xfree (temp_pathname); |
312 | ||
313 | /* If the search in gdb_sysroot still failed, try fully | |
314 | stripping the drive spec, and trying once more in the | |
315 | sysroot before giving up. | |
316 | ||
317 | c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */ | |
318 | ||
319 | temp_pathname = concat (sysroot, | |
320 | need_dir_separator ? SLASH_STRING : "", | |
321 | in_pathname + 2, (char *) NULL); | |
322 | ||
614c279d | 323 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
324 | if (found_file < 0) |
325 | xfree (temp_pathname); | |
326 | } | |
327 | } | |
0997b535 | 328 | |
ab38a727 PA |
329 | do_cleanups (old_chain); |
330 | ||
331 | /* We try to find the library in various ways. After each attempt, | |
332 | either found_file >= 0 and temp_pathname is a malloc'd string, or | |
333 | found_file < 0 and temp_pathname does not point to storage that | |
334 | needs to be freed. */ | |
335 | ||
336 | if (found_file < 0) | |
337 | temp_pathname = NULL; | |
338 | ||
f822c95b | 339 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
340 | absolute at this point, make it relative. (openp will try and open the |
341 | file according to its absolute path otherwise, which is not what we want.) | |
342 | Affects subsequent searches for this solib. */ | |
ab38a727 | 343 | if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
ba5f0d88 OF |
344 | { |
345 | /* First, get rid of any drive letters etc. */ | |
ab38a727 PA |
346 | while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
347 | in_pathname++; | |
ba5f0d88 OF |
348 | |
349 | /* Next, get rid of all leading dir separators. */ | |
ab38a727 PA |
350 | while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
351 | in_pathname++; | |
ba5f0d88 | 352 | } |
ab38a727 | 353 | |
c8c18e65 | 354 | /* If not found, search the solib_search_path (if any). */ |
e4f7b8c8 | 355 | if (found_file < 0 && solib_search_path != NULL) |
492c0ab7 JK |
356 | found_file = openp (solib_search_path, |
357 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
fbdebf46 | 358 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ab38a727 | 359 | |
ba5f0d88 OF |
360 | /* If not found, next search the solib_search_path (if any) for the basename |
361 | only (ignoring the path). This is to allow reading solibs from a path | |
362 | that differs from the opened path. */ | |
363 | if (found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
364 | found_file = openp (solib_search_path, |
365 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
ab38a727 PA |
366 | target_lbasename (fskind, in_pathname), |
367 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 368 | |
c378eb4e | 369 | /* If not found, try to use target supplied solib search method. */ |
66aba65d | 370 | if (found_file < 0 && ops->find_and_open_solib) |
637d6690 | 371 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 372 | &temp_pathname); |
2610b0bf | 373 | |
c378eb4e | 374 | /* If not found, next search the inferior's $PATH environment variable. */ |
b57fbfba | 375 | if (found_file < 0 && sysroot == NULL) |
3f81c18a VP |
376 | found_file = openp (get_in_environ (current_inferior ()->environment, |
377 | "PATH"), | |
492c0ab7 JK |
378 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
379 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 380 | |
ab38a727 | 381 | /* If not found, next search the inferior's $LD_LIBRARY_PATH |
c378eb4e | 382 | environment variable. */ |
b57fbfba | 383 | if (found_file < 0 && sysroot == NULL) |
3f81c18a VP |
384 | found_file = openp (get_in_environ (current_inferior ()->environment, |
385 | "LD_LIBRARY_PATH"), | |
492c0ab7 JK |
386 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
387 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 388 | |
572d275c UW |
389 | *fd = found_file; |
390 | return temp_pathname; | |
391 | } | |
392 | ||
393 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, | |
394 | it is used as file handle to open the file. Throws an error if the file | |
395 | could not be opened. Handles both local and remote file access. | |
396 | ||
a4453b7e TT |
397 | PATHNAME must be malloc'ed by the caller. It will be freed by this |
398 | function. If unsuccessful, the FD will be closed (unless FD was | |
399 | -1). */ | |
572d275c UW |
400 | |
401 | bfd * | |
402 | solib_bfd_fopen (char *pathname, int fd) | |
403 | { | |
2938e6cf | 404 | bfd *abfd = gdb_bfd_open (pathname, gnutarget, fd); |
572d275c | 405 | |
2938e6cf GB |
406 | if (abfd != NULL && !gdb_bfd_has_target_filename (abfd)) |
407 | bfd_set_cacheable (abfd, 1); | |
f1838a98 | 408 | |
f1838a98 UW |
409 | if (!abfd) |
410 | { | |
572d275c | 411 | make_cleanup (xfree, pathname); |
f1838a98 | 412 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 413 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
414 | } |
415 | ||
a4453b7e TT |
416 | xfree (pathname); |
417 | ||
520b0001 | 418 | return abfd; |
572d275c UW |
419 | } |
420 | ||
421 | /* Find shared library PATHNAME and open a BFD for it. */ | |
422 | ||
423 | bfd * | |
424 | solib_bfd_open (char *pathname) | |
425 | { | |
572d275c UW |
426 | char *found_pathname; |
427 | int found_file; | |
428 | bfd *abfd; | |
378d2b72 | 429 | const struct bfd_arch_info *b; |
572d275c | 430 | |
572d275c UW |
431 | /* Search for shared library file. */ |
432 | found_pathname = solib_find (pathname, &found_file); | |
433 | if (found_pathname == NULL) | |
048d532d PA |
434 | { |
435 | /* Return failure if the file could not be found, so that we can | |
436 | accumulate messages about missing libraries. */ | |
437 | if (errno == ENOENT) | |
438 | return NULL; | |
439 | ||
440 | perror_with_name (pathname); | |
441 | } | |
572d275c UW |
442 | |
443 | /* Open bfd for shared library. */ | |
444 | abfd = solib_bfd_fopen (found_pathname, found_file); | |
445 | ||
446 | /* Check bfd format. */ | |
f1838a98 | 447 | if (!bfd_check_format (abfd, bfd_object)) |
0997b535 | 448 | { |
f9a062ff | 449 | make_cleanup_bfd_unref (abfd); |
f1838a98 | 450 | error (_("`%s': not in executable format: %s"), |
a4453b7e | 451 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
0997b535 | 452 | } |
f1838a98 | 453 | |
378d2b72 | 454 | /* Check bfd arch. */ |
f5656ead | 455 | b = gdbarch_bfd_arch_info (target_gdbarch ()); |
69e2bf17 | 456 | if (!b->compatible (b, bfd_get_arch_info (abfd))) |
378d2b72 | 457 | warning (_("`%s': Shared library architecture %s is not compatible " |
a4453b7e | 458 | "with target architecture %s."), bfd_get_filename (abfd), |
378d2b72 HZ |
459 | bfd_get_arch_info (abfd)->printable_name, b->printable_name); |
460 | ||
f1838a98 | 461 | return abfd; |
e4f7b8c8 MS |
462 | } |
463 | ||
7f86f058 PA |
464 | /* Given a pointer to one of the shared objects in our list of mapped |
465 | objects, use the recorded name to open a bfd descriptor for the | |
466 | object, build a section table, relocate all the section addresses | |
467 | by the base address at which the shared object was mapped, and then | |
468 | add the sections to the target's section table. | |
e4f7b8c8 | 469 | |
7f86f058 PA |
470 | FIXME: In most (all?) cases the shared object file name recorded in |
471 | the dynamic linkage tables will be a fully qualified pathname. For | |
c5aa993b JM |
472 | cases where it isn't, do we really mimic the systems search |
473 | mechanism correctly in the below code (particularly the tilde | |
7f86f058 | 474 | expansion stuff?). */ |
c906108c SS |
475 | |
476 | static int | |
048d532d | 477 | solib_map_sections (struct so_list *so) |
c906108c | 478 | { |
3641da11 | 479 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c906108c | 480 | char *filename; |
0542c86d | 481 | struct target_section *p; |
c906108c SS |
482 | struct cleanup *old_chain; |
483 | bfd *abfd; | |
c5aa993b JM |
484 | |
485 | filename = tilde_expand (so->so_name); | |
b8c9b27d | 486 | old_chain = make_cleanup (xfree, filename); |
831a0c44 | 487 | abfd = ops->bfd_open (filename); |
f1838a98 | 488 | do_cleanups (old_chain); |
e4f7b8c8 | 489 | |
048d532d PA |
490 | if (abfd == NULL) |
491 | return 0; | |
492 | ||
13437d4b | 493 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
cbb099e8 | 494 | so->abfd = abfd; |
23e04971 | 495 | |
b030cf11 JB |
496 | /* Copy the full path name into so_name, allowing symbol_file_add |
497 | to find it later. This also affects the =library-loaded GDB/MI | |
498 | event, and in particular the part of that notification providing | |
499 | the library's host-side path. If we let the target dictate | |
500 | that objfile's path, and the target is different from the host, | |
501 | GDB/MI will not provide the correct host-side path. */ | |
502 | if (strlen (bfd_get_filename (abfd)) >= SO_NAME_MAX_PATH_SIZE) | |
503 | error (_("Shared library file name is too long.")); | |
504 | strcpy (so->so_name, bfd_get_filename (abfd)); | |
505 | ||
13437d4b | 506 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
23e04971 | 507 | { |
8a3fe4f8 | 508 | error (_("Can't find the file sections in `%s': %s"), |
13437d4b | 509 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
23e04971 | 510 | } |
104c1213 | 511 | |
13437d4b | 512 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 513 | { |
13437d4b KB |
514 | /* Relocate the section binding addresses as recorded in the shared |
515 | object's file by the base address to which the object was actually | |
c378eb4e | 516 | mapped. */ |
66aba65d | 517 | ops->relocate_section_addresses (so, p); |
cfa9d6d9 DJ |
518 | |
519 | /* If the target didn't provide information about the address | |
520 | range of the shared object, assume we want the location of | |
521 | the .text section. */ | |
522 | if (so->addr_low == 0 && so->addr_high == 0 | |
523 | && strcmp (p->the_bfd_section->name, ".text") == 0) | |
13437d4b | 524 | { |
cfa9d6d9 DJ |
525 | so->addr_low = p->addr; |
526 | so->addr_high = p->endaddr; | |
13437d4b | 527 | } |
104c1213 JM |
528 | } |
529 | ||
048d532d PA |
530 | /* Add the shared object's sections to the current set of file |
531 | section tables. Do this immediately after mapping the object so | |
532 | that later nodes in the list can query this object, as is needed | |
533 | in solib-osf.c. */ | |
ed9eebaf | 534 | add_target_sections (so, so->sections, so->sections_end); |
048d532d PA |
535 | |
536 | return 1; | |
104c1213 | 537 | } |
c906108c | 538 | |
0892cb63 DE |
539 | /* Free symbol-file related contents of SO and reset for possible reloading |
540 | of SO. If we have opened a BFD for SO, close it. If we have placed SO's | |
541 | sections in some target's section table, the caller is responsible for | |
542 | removing them. | |
a86988f2 PA |
543 | |
544 | This function doesn't mess with objfiles at all. If there is an | |
545 | objfile associated with SO that needs to be removed, the caller is | |
546 | responsible for taking care of that. */ | |
547 | ||
548 | static void | |
0892cb63 | 549 | clear_so (struct so_list *so) |
a86988f2 | 550 | { |
3641da11 | 551 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
0892cb63 | 552 | |
a86988f2 PA |
553 | if (so->sections) |
554 | { | |
555 | xfree (so->sections); | |
556 | so->sections = so->sections_end = NULL; | |
557 | } | |
558 | ||
559 | gdb_bfd_unref (so->abfd); | |
560 | so->abfd = NULL; | |
561 | ||
562 | /* Our caller closed the objfile, possibly via objfile_purge_solibs. */ | |
563 | so->symbols_loaded = 0; | |
564 | so->objfile = NULL; | |
565 | ||
566 | so->addr_low = so->addr_high = 0; | |
567 | ||
568 | /* Restore the target-supplied file name. SO_NAME may be the path | |
569 | of the symbol file. */ | |
570 | strcpy (so->so_name, so->so_original_name); | |
0892cb63 DE |
571 | |
572 | /* Do the same for target-specific data. */ | |
573 | if (ops->clear_so != NULL) | |
574 | ops->clear_so (so); | |
a86988f2 PA |
575 | } |
576 | ||
7f86f058 | 577 | /* Free the storage associated with the `struct so_list' object SO. |
c378eb4e | 578 | If we have opened a BFD for SO, close it. |
c906108c | 579 | |
07cd4b97 JB |
580 | The caller is responsible for removing SO from whatever list it is |
581 | a member of. If we have placed SO's sections in some target's | |
582 | section table, the caller is responsible for removing them. | |
c906108c | 583 | |
07cd4b97 JB |
584 | This function doesn't mess with objfiles at all. If there is an |
585 | objfile associated with SO that needs to be removed, the caller is | |
586 | responsible for taking care of that. */ | |
587 | ||
13437d4b | 588 | void |
07cd4b97 | 589 | free_so (struct so_list *so) |
c906108c | 590 | { |
3641da11 | 591 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c5aa993b | 592 | |
0892cb63 | 593 | clear_so (so); |
66aba65d | 594 | ops->free_so (so); |
07cd4b97 | 595 | |
b8c9b27d | 596 | xfree (so); |
c906108c SS |
597 | } |
598 | ||
07cd4b97 | 599 | |
f8766ec1 KB |
600 | /* Return address of first so_list entry in master shared object list. */ |
601 | struct so_list * | |
602 | master_so_list (void) | |
603 | { | |
604 | return so_list_head; | |
605 | } | |
606 | ||
7eedccfa PP |
607 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
608 | be chatty about it. Return non-zero if any symbols were actually | |
42a6e6a0 MK |
609 | loaded. */ |
610 | ||
611 | int | |
7eedccfa | 612 | solib_read_symbols (struct so_list *so, int flags) |
42a6e6a0 MK |
613 | { |
614 | if (so->symbols_loaded) | |
615 | { | |
a86988f2 | 616 | /* If needed, we've already warned in our caller. */ |
42a6e6a0 | 617 | } |
8bb75286 DJ |
618 | else if (so->abfd == NULL) |
619 | { | |
048d532d PA |
620 | /* We've already warned about this library, when trying to open |
621 | it. */ | |
8bb75286 | 622 | } |
42a6e6a0 MK |
623 | else |
624 | { | |
048d532d | 625 | |
7dcd53a0 TT |
626 | flags |= current_inferior ()->symfile_flags; |
627 | ||
492d29ea | 628 | TRY |
048d532d PA |
629 | { |
630 | struct section_addr_info *sap; | |
631 | ||
632 | /* Have we already loaded this shared object? */ | |
633 | ALL_OBJFILES (so->objfile) | |
634 | { | |
4262abfb | 635 | if (filename_cmp (objfile_name (so->objfile), so->so_name) == 0 |
e4f6d2ec | 636 | && so->objfile->addr_low == so->addr_low) |
048d532d PA |
637 | break; |
638 | } | |
639 | if (so->objfile != NULL) | |
640 | break; | |
641 | ||
642 | sap = build_section_addr_info_from_section_table (so->sections, | |
643 | so->sections_end); | |
24ba069a | 644 | so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name, |
63524580 JK |
645 | flags, sap, OBJF_SHARED, |
646 | NULL); | |
e4f6d2ec | 647 | so->objfile->addr_low = so->addr_low; |
048d532d | 648 | free_section_addr_info (sap); |
492d29ea PA |
649 | |
650 | so->symbols_loaded = 1; | |
651 | } | |
652 | CATCH (e, RETURN_MASK_ERROR) | |
653 | { | |
654 | exception_fprintf (gdb_stderr, e, _("Error while reading shared" | |
655 | " library symbols for %s:\n"), | |
656 | so->so_name); | |
048d532d | 657 | } |
492d29ea | 658 | END_CATCH |
048d532d | 659 | |
7eedccfa | 660 | return 1; |
42a6e6a0 MK |
661 | } |
662 | ||
663 | return 0; | |
664 | } | |
c906108c | 665 | |
59145f8c AR |
666 | /* Return 1 if KNOWN->objfile is used by any other so_list object in the |
667 | SO_LIST_HEAD list. Return 0 otherwise. */ | |
668 | ||
669 | static int | |
670 | solib_used (const struct so_list *const known) | |
671 | { | |
672 | const struct so_list *pivot; | |
673 | ||
674 | for (pivot = so_list_head; pivot != NULL; pivot = pivot->next) | |
675 | if (pivot != known && pivot->objfile == known->objfile) | |
676 | return 1; | |
677 | return 0; | |
678 | } | |
679 | ||
7f86f058 | 680 | /* Synchronize GDB's shared object list with inferior's. |
c906108c | 681 | |
07cd4b97 | 682 | Extract the list of currently loaded shared objects from the |
105b175f JB |
683 | inferior, and compare it with the list of shared objects currently |
684 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
685 | with the inferior's new list. | |
c906108c | 686 | |
105b175f JB |
687 | If we notice that the inferior has unloaded some shared objects, |
688 | free any symbolic info GDB had read about those shared objects. | |
689 | ||
690 | Don't load symbolic info for any new shared objects; just add them | |
691 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
692 | |
693 | If FROM_TTY is non-null, feel free to print messages about what | |
694 | we're doing. | |
c906108c | 695 | |
07cd4b97 JB |
696 | If TARGET is non-null, add the sections of all new shared objects |
697 | to TARGET's section table. Note that this doesn't remove any | |
698 | sections for shared objects that have been unloaded, and it | |
699 | doesn't check to see if the new shared objects are already present in | |
700 | the section table. But we only use this for core files and | |
701 | processes we've just attached to, so that's okay. */ | |
c906108c | 702 | |
a78f21af | 703 | static void |
105b175f | 704 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 | 705 | { |
3641da11 | 706 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 707 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
708 | struct so_list *gdb, **gdb_link; |
709 | ||
181e7f93 PA |
710 | /* We can reach here due to changing solib-search-path or the |
711 | sysroot, before having any inferior. */ | |
50c71eaf | 712 | if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid)) |
181e7f93 PA |
713 | { |
714 | struct inferior *inf = current_inferior (); | |
715 | ||
716 | /* If we are attaching to a running process for which we | |
717 | have not opened a symbol file, we may be able to get its | |
718 | symbols now! */ | |
719 | if (inf->attach_flag && symfile_objfile == NULL) | |
720 | catch_errors (ops->open_symbol_file_object, &from_tty, | |
721 | "Error reading attached process's symbol file.\n", | |
722 | RETURN_MASK_ALL); | |
723 | } | |
104c1213 | 724 | |
07cd4b97 JB |
725 | /* GDB and the inferior's dynamic linker each maintain their own |
726 | list of currently loaded shared objects; we want to bring the | |
727 | former in sync with the latter. Scan both lists, seeing which | |
728 | shared objects appear where. There are three cases: | |
729 | ||
730 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
731 | knows about it already, and it's still loaded in the inferior. |
732 | Nothing needs to happen. | |
07cd4b97 JB |
733 | |
734 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
735 | the inferior has unloaded it. We should remove the shared |
736 | object from GDB's tables. | |
07cd4b97 JB |
737 | |
738 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
739 | means that it's just been loaded. We should add it to GDB's |
740 | tables. | |
07cd4b97 JB |
741 | |
742 | So we walk GDB's list, checking each entry to see if it appears | |
743 | in the inferior's list too. If it does, no action is needed, and | |
744 | we remove it from the inferior's list. If it doesn't, the | |
745 | inferior has unloaded it, and we remove it from GDB's list. By | |
746 | the time we're done walking GDB's list, the inferior's list | |
747 | contains only the new shared objects, which we then add. */ | |
748 | ||
749 | gdb = so_list_head; | |
750 | gdb_link = &so_list_head; | |
751 | while (gdb) | |
c906108c | 752 | { |
07cd4b97 JB |
753 | struct so_list *i = inferior; |
754 | struct so_list **i_link = &inferior; | |
755 | ||
756 | /* Check to see whether the shared object *gdb also appears in | |
757 | the inferior's current list. */ | |
758 | while (i) | |
c906108c | 759 | { |
a7c02bc8 VP |
760 | if (ops->same) |
761 | { | |
762 | if (ops->same (gdb, i)) | |
763 | break; | |
764 | } | |
765 | else | |
766 | { | |
0ba1096a | 767 | if (! filename_cmp (gdb->so_original_name, i->so_original_name)) |
a7c02bc8 VP |
768 | break; |
769 | } | |
07cd4b97 JB |
770 | |
771 | i_link = &i->next; | |
772 | i = *i_link; | |
c906108c | 773 | } |
c5aa993b | 774 | |
07cd4b97 JB |
775 | /* If the shared object appears on the inferior's list too, then |
776 | it's still loaded, so we don't need to do anything. Delete | |
777 | it from the inferior's list, and leave it on GDB's list. */ | |
778 | if (i) | |
c906108c | 779 | { |
07cd4b97 | 780 | *i_link = i->next; |
07cd4b97 JB |
781 | free_so (i); |
782 | gdb_link = &gdb->next; | |
783 | gdb = *gdb_link; | |
784 | } | |
785 | ||
786 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
787 | else | |
788 | { | |
42a6e6a0 MK |
789 | /* Notify any observer that the shared object has been |
790 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
791 | observer_notify_solib_unloaded (gdb); |
792 | ||
edcc5120 TT |
793 | VEC_safe_push (char_ptr, current_program_space->deleted_solibs, |
794 | xstrdup (gdb->so_name)); | |
795 | ||
07cd4b97 | 796 | *gdb_link = gdb->next; |
07cd4b97 JB |
797 | |
798 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
59145f8c AR |
799 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED) |
800 | && !solib_used (gdb)) | |
07cd4b97 JB |
801 | free_objfile (gdb->objfile); |
802 | ||
803 | /* Some targets' section tables might be referring to | |
804 | sections from so->abfd; remove them. */ | |
046ac79f | 805 | remove_target_sections (gdb); |
07cd4b97 JB |
806 | |
807 | free_so (gdb); | |
808 | gdb = *gdb_link; | |
c906108c SS |
809 | } |
810 | } | |
c5aa993b | 811 | |
07cd4b97 JB |
812 | /* Now the inferior's list contains only shared objects that don't |
813 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 814 | to GDB's shared object list. */ |
07cd4b97 | 815 | if (inferior) |
c906108c | 816 | { |
048d532d PA |
817 | int not_found = 0; |
818 | const char *not_found_filename = NULL; | |
819 | ||
07cd4b97 JB |
820 | struct so_list *i; |
821 | ||
822 | /* Add the new shared objects to GDB's list. */ | |
823 | *gdb_link = inferior; | |
824 | ||
e8930304 | 825 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 826 | for (i = inferior; i; i = i->next) |
c906108c | 827 | { |
048d532d | 828 | |
6c95b8df | 829 | i->pspace = current_program_space; |
edcc5120 | 830 | VEC_safe_push (so_list_ptr, current_program_space->added_solibs, i); |
07cd4b97 | 831 | |
492d29ea | 832 | TRY |
048d532d PA |
833 | { |
834 | /* Fill in the rest of the `struct so_list' node. */ | |
835 | if (!solib_map_sections (i)) | |
836 | { | |
837 | not_found++; | |
838 | if (not_found_filename == NULL) | |
839 | not_found_filename = i->so_original_name; | |
840 | } | |
841 | } | |
07cd4b97 | 842 | |
492d29ea PA |
843 | CATCH (e, RETURN_MASK_ERROR) |
844 | { | |
845 | exception_fprintf (gdb_stderr, e, | |
846 | _("Error while mapping shared " | |
847 | "library sections:\n")); | |
848 | } | |
849 | END_CATCH | |
42a6e6a0 MK |
850 | |
851 | /* Notify any observer that the shared object has been | |
048d532d | 852 | loaded now that we've added it to GDB's tables. */ |
42a6e6a0 | 853 | observer_notify_solib_loaded (i); |
c906108c | 854 | } |
048d532d PA |
855 | |
856 | /* If a library was not found, issue an appropriate warning | |
857 | message. We have to use a single call to warning in case the | |
858 | front end does something special with warnings, e.g., pop up | |
859 | a dialog box. It Would Be Nice if we could get a "warning: " | |
860 | prefix on each line in the CLI front end, though - it doesn't | |
861 | stand out well. */ | |
862 | ||
863 | if (not_found == 1) | |
3e43a32a MS |
864 | warning (_("Could not load shared library symbols for %s.\n" |
865 | "Do you need \"set solib-search-path\" " | |
866 | "or \"set sysroot\"?"), | |
048d532d PA |
867 | not_found_filename); |
868 | else if (not_found > 1) | |
869 | warning (_("\ | |
870 | Could not load shared library symbols for %d libraries, e.g. %s.\n\ | |
871 | Use the \"info sharedlibrary\" command to see the complete listing.\n\ | |
872 | Do you need \"set solib-search-path\" or \"set sysroot\"?"), | |
873 | not_found, not_found_filename); | |
e8930304 | 874 | } |
105b175f JB |
875 | } |
876 | ||
17a37d48 PP |
877 | |
878 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
879 | |
880 | Uses a fairly simplistic heuristic approach where we check | |
881 | the file name against "/libpthread". This can lead to false | |
882 | positives, but this should be good enough in practice. */ | |
883 | ||
17a37d48 PP |
884 | int |
885 | libpthread_name_p (const char *name) | |
886 | { | |
887 | return (strstr (name, "/libpthread") != NULL); | |
888 | } | |
889 | ||
890 | /* Return non-zero if SO is the libpthread shared library. */ | |
891 | ||
6612ad7f JB |
892 | static int |
893 | libpthread_solib_p (struct so_list *so) | |
894 | { | |
17a37d48 | 895 | return libpthread_name_p (so->so_name); |
6612ad7f | 896 | } |
105b175f | 897 | |
7f86f058 | 898 | /* Read in symbolic information for any shared objects whose names |
105b175f JB |
899 | match PATTERN. (If we've already read a shared object's symbol |
900 | info, leave it alone.) If PATTERN is zero, read them all. | |
901 | ||
990f9fe3 FF |
902 | If READSYMS is 0, defer reading symbolic information until later |
903 | but still do any needed low level processing. | |
904 | ||
105b175f JB |
905 | FROM_TTY and TARGET are as described for update_solib_list, above. */ |
906 | ||
907 | void | |
414842dc | 908 | solib_add (const char *pattern, int from_tty, |
3e43a32a | 909 | struct target_ops *target, int readsyms) |
105b175f JB |
910 | { |
911 | struct so_list *gdb; | |
912 | ||
770e7fc7 DE |
913 | if (print_symbol_loading_p (from_tty, 0, 0)) |
914 | { | |
915 | if (pattern != NULL) | |
916 | { | |
917 | printf_unfiltered (_("Loading symbols for shared libraries: %s\n"), | |
918 | pattern); | |
919 | } | |
920 | else | |
921 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
922 | } | |
923 | ||
2eff07b3 PP |
924 | current_program_space->solib_add_generation++; |
925 | ||
105b175f JB |
926 | if (pattern) |
927 | { | |
928 | char *re_err = re_comp (pattern); | |
929 | ||
930 | if (re_err) | |
8a3fe4f8 | 931 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
932 | } |
933 | ||
934 | update_solib_list (from_tty, target); | |
c906108c | 935 | |
105b175f JB |
936 | /* Walk the list of currently loaded shared libraries, and read |
937 | symbols for any that match the pattern --- or any whose symbols | |
938 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
939 | { |
940 | int any_matches = 0; | |
941 | int loaded_any_symbols = 0; | |
7eedccfa PP |
942 | const int flags = |
943 | SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0); | |
c906108c | 944 | |
e8930304 JB |
945 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
946 | if (! pattern || re_exec (gdb->so_name)) | |
947 | { | |
6612ad7f JB |
948 | /* Normally, we would read the symbols from that library |
949 | only if READSYMS is set. However, we're making a small | |
950 | exception for the pthread library, because we sometimes | |
951 | need the library symbols to be loaded in order to provide | |
952 | thread support (x86-linux for instance). */ | |
953 | const int add_this_solib = | |
954 | (readsyms || libpthread_solib_p (gdb)); | |
955 | ||
e8930304 | 956 | any_matches = 1; |
a86988f2 PA |
957 | if (add_this_solib) |
958 | { | |
959 | if (gdb->symbols_loaded) | |
960 | { | |
961 | /* If no pattern was given, be quiet for shared | |
962 | libraries we have already loaded. */ | |
963 | if (pattern && (from_tty || info_verbose)) | |
964 | printf_unfiltered (_("Symbols already loaded for %s\n"), | |
965 | gdb->so_name); | |
966 | } | |
967 | else if (solib_read_symbols (gdb, flags)) | |
968 | loaded_any_symbols = 1; | |
969 | } | |
e8930304 JB |
970 | } |
971 | ||
7eedccfa PP |
972 | if (loaded_any_symbols) |
973 | breakpoint_re_set (); | |
974 | ||
e8930304 JB |
975 | if (from_tty && pattern && ! any_matches) |
976 | printf_unfiltered | |
977 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
978 | ||
979 | if (loaded_any_symbols) | |
980 | { | |
3641da11 | 981 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 982 | |
e8930304 JB |
983 | /* Getting new symbols may change our opinion about what is |
984 | frameless. */ | |
985 | reinit_frame_cache (); | |
986 | ||
66aba65d | 987 | ops->special_symbol_handling (); |
e8930304 JB |
988 | } |
989 | } | |
c906108c SS |
990 | } |
991 | ||
7f86f058 PA |
992 | /* Implement the "info sharedlibrary" command. Walk through the |
993 | shared library list and print information about each attached | |
994 | library matching PATTERN. If PATTERN is elided, print them | |
995 | all. */ | |
c906108c SS |
996 | |
997 | static void | |
55333a84 | 998 | info_sharedlibrary_command (char *pattern, int from_tty) |
c906108c | 999 | { |
52f0bd74 | 1000 | struct so_list *so = NULL; /* link map state variable */ |
55333a84 | 1001 | int so_missing_debug_info = 0; |
c906108c | 1002 | int addr_width; |
55333a84 DE |
1003 | int nr_libs; |
1004 | struct cleanup *table_cleanup; | |
f5656ead | 1005 | struct gdbarch *gdbarch = target_gdbarch (); |
79a45e25 | 1006 | struct ui_out *uiout = current_uiout; |
55333a84 DE |
1007 | |
1008 | if (pattern) | |
1009 | { | |
1010 | char *re_err = re_comp (pattern); | |
1011 | ||
1012 | if (re_err) | |
1013 | error (_("Invalid regexp: %s"), re_err); | |
1014 | } | |
c906108c | 1015 | |
84eb3c4f | 1016 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
55333a84 | 1017 | addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4); |
c906108c | 1018 | |
105b175f | 1019 | update_solib_list (from_tty, 0); |
07cd4b97 | 1020 | |
55333a84 DE |
1021 | /* make_cleanup_ui_out_table_begin_end needs to know the number of |
1022 | rows, so we need to make two passes over the libs. */ | |
1023 | ||
1024 | for (nr_libs = 0, so = so_list_head; so; so = so->next) | |
c906108c | 1025 | { |
c5aa993b | 1026 | if (so->so_name[0]) |
c906108c | 1027 | { |
55333a84 DE |
1028 | if (pattern && ! re_exec (so->so_name)) |
1029 | continue; | |
1030 | ++nr_libs; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | table_cleanup = | |
1035 | make_cleanup_ui_out_table_begin_end (uiout, 4, nr_libs, | |
1036 | "SharedLibraryTable"); | |
1037 | ||
1038 | /* The "- 1" is because ui_out adds one space between columns. */ | |
1039 | ui_out_table_header (uiout, addr_width - 1, ui_left, "from", "From"); | |
1040 | ui_out_table_header (uiout, addr_width - 1, ui_left, "to", "To"); | |
1041 | ui_out_table_header (uiout, 12 - 1, ui_left, "syms-read", "Syms Read"); | |
1042 | ui_out_table_header (uiout, 0, ui_noalign, | |
1043 | "name", "Shared Object Library"); | |
1044 | ||
1045 | ui_out_table_body (uiout); | |
1046 | ||
1047 | for (so = so_list_head; so; so = so->next) | |
1048 | { | |
1049 | struct cleanup *lib_cleanup; | |
c906108c | 1050 | |
55333a84 DE |
1051 | if (! so->so_name[0]) |
1052 | continue; | |
1053 | if (pattern && ! re_exec (so->so_name)) | |
1054 | continue; | |
1055 | ||
1056 | lib_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "lib"); | |
1057 | ||
1058 | if (so->addr_high != 0) | |
1059 | { | |
1060 | ui_out_field_core_addr (uiout, "from", gdbarch, so->addr_low); | |
1061 | ui_out_field_core_addr (uiout, "to", gdbarch, so->addr_high); | |
1062 | } | |
1063 | else | |
1064 | { | |
1065 | ui_out_field_skip (uiout, "from"); | |
1066 | ui_out_field_skip (uiout, "to"); | |
c906108c | 1067 | } |
55333a84 DE |
1068 | |
1069 | if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())) | |
1070 | && so->symbols_loaded | |
e0ae4240 | 1071 | && !objfile_has_symbols (so->objfile)) |
55333a84 DE |
1072 | { |
1073 | so_missing_debug_info = 1; | |
1074 | ui_out_field_string (uiout, "syms-read", "Yes (*)"); | |
1075 | } | |
1076 | else | |
1077 | ui_out_field_string (uiout, "syms-read", | |
1078 | so->symbols_loaded ? "Yes" : "No"); | |
1079 | ||
1080 | ui_out_field_string (uiout, "name", so->so_name); | |
1081 | ||
1082 | ui_out_text (uiout, "\n"); | |
1083 | ||
1084 | do_cleanups (lib_cleanup); | |
c906108c | 1085 | } |
55333a84 DE |
1086 | |
1087 | do_cleanups (table_cleanup); | |
1088 | ||
1089 | if (nr_libs == 0) | |
1090 | { | |
1091 | if (pattern) | |
1092 | ui_out_message (uiout, 0, | |
1093 | _("No shared libraries matched.\n")); | |
1094 | else | |
1095 | ui_out_message (uiout, 0, | |
1096 | _("No shared libraries loaded at this time.\n")); | |
1097 | } | |
1098 | else | |
c906108c | 1099 | { |
55333a84 DE |
1100 | if (so_missing_debug_info) |
1101 | ui_out_message (uiout, 0, | |
3e43a32a MS |
1102 | _("(*): Shared library is missing " |
1103 | "debugging information.\n")); | |
c906108c SS |
1104 | } |
1105 | } | |
1106 | ||
5fd1a349 PP |
1107 | /* Return 1 if ADDRESS lies within SOLIB. */ |
1108 | ||
1109 | int | |
1110 | solib_contains_address_p (const struct so_list *const solib, | |
1111 | CORE_ADDR address) | |
1112 | { | |
0542c86d | 1113 | struct target_section *p; |
5fd1a349 PP |
1114 | |
1115 | for (p = solib->sections; p < solib->sections_end; p++) | |
1116 | if (p->addr <= address && address < p->endaddr) | |
1117 | return 1; | |
1118 | ||
1119 | return 0; | |
1120 | } | |
1121 | ||
7f86f058 PA |
1122 | /* If ADDRESS is in a shared lib in program space PSPACE, return its |
1123 | name. | |
c906108c | 1124 | |
7f86f058 PA |
1125 | Provides a hook for other gdb routines to discover whether or not a |
1126 | particular address is within the mapped address space of a shared | |
1127 | library. | |
c906108c | 1128 | |
c5aa993b JM |
1129 | For example, this routine is called at one point to disable |
1130 | breakpoints which are in shared libraries that are not currently | |
7f86f058 | 1131 | mapped in. */ |
c906108c SS |
1132 | |
1133 | char * | |
6c95b8df | 1134 | solib_name_from_address (struct program_space *pspace, CORE_ADDR address) |
c906108c | 1135 | { |
6c95b8df | 1136 | struct so_list *so = NULL; |
c5aa993b | 1137 | |
6c95b8df | 1138 | for (so = pspace->so_list; so; so = so->next) |
5fd1a349 PP |
1139 | if (solib_contains_address_p (so, address)) |
1140 | return (so->so_name); | |
07cd4b97 | 1141 | |
c906108c SS |
1142 | return (0); |
1143 | } | |
1144 | ||
de18c1d8 JM |
1145 | /* Return whether the data starting at VADDR, size SIZE, must be kept |
1146 | in a core file for shared libraries loaded before "gcore" is used | |
1147 | to be handled correctly when the core file is loaded. This only | |
1148 | applies when the section would otherwise not be kept in the core | |
1149 | file (in particular, for readonly sections). */ | |
1150 | ||
1151 | int | |
1152 | solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size) | |
1153 | { | |
3641da11 | 1154 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
de18c1d8 JM |
1155 | |
1156 | if (ops->keep_data_in_core) | |
1157 | return ops->keep_data_in_core (vaddr, size); | |
1158 | else | |
1159 | return 0; | |
1160 | } | |
1161 | ||
c906108c SS |
1162 | /* Called by free_all_symtabs */ |
1163 | ||
c5aa993b | 1164 | void |
fba45db2 | 1165 | clear_solib (void) |
c906108c | 1166 | { |
3641da11 | 1167 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 1168 | |
085dd6e6 JM |
1169 | /* This function is expected to handle ELF shared libraries. It is |
1170 | also used on Solaris, which can run either ELF or a.out binaries | |
1171 | (for compatibility with SunOS 4), both of which can use shared | |
1172 | libraries. So we don't know whether we have an ELF executable or | |
1173 | an a.out executable until the user chooses an executable file. | |
1174 | ||
1175 | ELF shared libraries don't get mapped into the address space | |
1176 | until after the program starts, so we'd better not try to insert | |
1177 | breakpoints in them immediately. We have to wait until the | |
1178 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
1179 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
1180 | it's ready. | |
1181 | ||
1182 | SunOS shared libraries seem to be different --- they're present | |
1183 | as soon as the process begins execution, so there's no need to | |
1184 | put off inserting breakpoints. There's also nowhere to put a | |
1185 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
1186 | around to it. | |
1187 | ||
1188 | So: disable breakpoints only if we're using ELF shared libs. */ | |
1189 | if (exec_bfd != NULL | |
1190 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
cb851954 | 1191 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 1192 | |
c906108c SS |
1193 | while (so_list_head) |
1194 | { | |
07cd4b97 | 1195 | struct so_list *so = so_list_head; |
433759f7 | 1196 | |
07cd4b97 | 1197 | so_list_head = so->next; |
c86cf029 | 1198 | observer_notify_solib_unloaded (so); |
046ac79f | 1199 | remove_target_sections (so); |
07cd4b97 | 1200 | free_so (so); |
c906108c | 1201 | } |
07cd4b97 | 1202 | |
66aba65d | 1203 | ops->clear_solib (); |
c906108c SS |
1204 | } |
1205 | ||
7f86f058 PA |
1206 | /* Shared library startup support. When GDB starts up the inferior, |
1207 | it nurses it along (through the shell) until it is ready to execute | |
1208 | its first instruction. At this point, this function gets | |
1209 | called. */ | |
c5aa993b JM |
1210 | |
1211 | void | |
268a4a75 | 1212 | solib_create_inferior_hook (int from_tty) |
c906108c | 1213 | { |
3641da11 | 1214 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1215 | |
268a4a75 | 1216 | ops->solib_create_inferior_hook (from_tty); |
c906108c SS |
1217 | } |
1218 | ||
7f86f058 PA |
1219 | /* Check to see if an address is in the dynamic loader's dynamic |
1220 | symbol resolution code. Return 1 if so, 0 otherwise. */ | |
d7fa2ae2 KB |
1221 | |
1222 | int | |
1223 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
1224 | { | |
3641da11 | 1225 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1226 | |
66aba65d | 1227 | return ops->in_dynsym_resolve_code (pc); |
d7fa2ae2 | 1228 | } |
c906108c | 1229 | |
7f86f058 | 1230 | /* Implements the "sharedlibrary" command. */ |
c906108c SS |
1231 | |
1232 | static void | |
fba45db2 | 1233 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
1234 | { |
1235 | dont_repeat (); | |
990f9fe3 | 1236 | solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
1237 | } |
1238 | ||
7f86f058 | 1239 | /* Implements the command "nosharedlibrary", which discards symbols |
cb0ba49e MS |
1240 | that have been auto-loaded from shared libraries. Symbols from |
1241 | shared libraries that were added by explicit request of the user | |
1242 | are not discarded. Also called from remote.c. */ | |
1243 | ||
c60a7562 MS |
1244 | void |
1245 | no_shared_libraries (char *ignored, int from_tty) | |
1246 | { | |
a3247a22 PP |
1247 | /* The order of the two routines below is important: clear_solib notifies |
1248 | the solib_unloaded observers, and some of these observers might need | |
1249 | access to their associated objfiles. Therefore, we can not purge the | |
1250 | solibs' objfiles before clear_solib has been called. */ | |
1251 | ||
615b9dba | 1252 | clear_solib (); |
a3247a22 | 1253 | objfile_purge_solibs (); |
c60a7562 | 1254 | } |
c906108c | 1255 | |
f9e14852 GB |
1256 | /* See solib.h. */ |
1257 | ||
1258 | void | |
1259 | update_solib_breakpoints (void) | |
1260 | { | |
1261 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1262 | ||
1263 | if (ops->update_breakpoints != NULL) | |
1264 | ops->update_breakpoints (); | |
1265 | } | |
1266 | ||
1267 | /* See solib.h. */ | |
1268 | ||
1269 | void | |
1270 | handle_solib_event (void) | |
1271 | { | |
1272 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1273 | ||
1274 | if (ops->handle_event != NULL) | |
1275 | ops->handle_event (); | |
1276 | ||
1277 | clear_program_space_solib_cache (current_inferior ()->pspace); | |
1278 | ||
1279 | /* Check for any newly added shared libraries if we're supposed to | |
1280 | be adding them automatically. Switch terminal for any messages | |
1281 | produced by breakpoint_re_set. */ | |
1282 | target_terminal_ours_for_output (); | |
1283 | solib_add (NULL, 0, ¤t_target, auto_solib_add); | |
1284 | target_terminal_inferior (); | |
1285 | } | |
1286 | ||
a86988f2 PA |
1287 | /* Reload shared libraries, but avoid reloading the same symbol file |
1288 | we already have loaded. */ | |
1289 | ||
1290 | static void | |
1291 | reload_shared_libraries_1 (int from_tty) | |
1292 | { | |
1293 | struct so_list *so; | |
1294 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); | |
1295 | ||
770e7fc7 DE |
1296 | if (print_symbol_loading_p (from_tty, 0, 0)) |
1297 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
1298 | ||
a86988f2 PA |
1299 | for (so = so_list_head; so != NULL; so = so->next) |
1300 | { | |
1301 | char *filename, *found_pathname = NULL; | |
1302 | bfd *abfd; | |
a86988f2 PA |
1303 | int was_loaded = so->symbols_loaded; |
1304 | const int flags = | |
1305 | SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0); | |
1306 | ||
1307 | filename = tilde_expand (so->so_original_name); | |
42b1321c | 1308 | make_cleanup (xfree, filename); |
a86988f2 PA |
1309 | abfd = solib_bfd_open (filename); |
1310 | if (abfd != NULL) | |
1311 | { | |
1312 | found_pathname = xstrdup (bfd_get_filename (abfd)); | |
1313 | make_cleanup (xfree, found_pathname); | |
cbb099e8 | 1314 | gdb_bfd_unref (abfd); |
a86988f2 PA |
1315 | } |
1316 | ||
1317 | /* If this shared library is no longer associated with its previous | |
1318 | symbol file, close that. */ | |
1319 | if ((found_pathname == NULL && was_loaded) | |
1320 | || (found_pathname != NULL | |
0ba1096a | 1321 | && filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1322 | { |
59145f8c AR |
1323 | if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED) |
1324 | && !solib_used (so)) | |
a86988f2 | 1325 | free_objfile (so->objfile); |
046ac79f | 1326 | remove_target_sections (so); |
0892cb63 | 1327 | clear_so (so); |
a86988f2 PA |
1328 | } |
1329 | ||
1330 | /* If this shared library is now associated with a new symbol | |
1331 | file, open it. */ | |
1332 | if (found_pathname != NULL | |
1333 | && (!was_loaded | |
0ba1096a | 1334 | || filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1335 | { |
492d29ea | 1336 | int got_error = 0; |
a86988f2 | 1337 | |
492d29ea PA |
1338 | TRY |
1339 | { | |
1340 | solib_map_sections (so); | |
1341 | } | |
1342 | ||
1343 | CATCH (e, RETURN_MASK_ERROR) | |
1344 | { | |
1345 | exception_fprintf (gdb_stderr, e, | |
1346 | _("Error while mapping " | |
1347 | "shared library sections:\n")); | |
1348 | got_error = 1; | |
1349 | } | |
1350 | END_CATCH | |
a86988f2 | 1351 | |
492d29ea PA |
1352 | if (!got_error |
1353 | && (auto_solib_add || was_loaded || libpthread_solib_p (so))) | |
1354 | solib_read_symbols (so, flags); | |
a86988f2 PA |
1355 | } |
1356 | } | |
1357 | ||
1358 | do_cleanups (old_chain); | |
1359 | } | |
1360 | ||
cf466558 | 1361 | static void |
f397e303 AC |
1362 | reload_shared_libraries (char *ignored, int from_tty, |
1363 | struct cmd_list_element *e) | |
cf466558 | 1364 | { |
3641da11 | 1365 | const struct target_so_ops *ops; |
a86988f2 PA |
1366 | |
1367 | reload_shared_libraries_1 (from_tty); | |
1368 | ||
f5656ead | 1369 | ops = solib_ops (target_gdbarch ()); |
a86988f2 | 1370 | |
c378eb4e | 1371 | /* Creating inferior hooks here has two purposes. First, if we reload |
c8fa6cdd VP |
1372 | shared libraries then the address of solib breakpoint we've computed |
1373 | previously might be no longer valid. For example, if we forgot to set | |
1374 | solib-absolute-prefix and are setting it right now, then the previous | |
1375 | breakpoint address is plain wrong. Second, installing solib hooks | |
1376 | also implicitly figures were ld.so is and loads symbols for it. | |
1377 | Absent this call, if we've just connected to a target and set | |
1378 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1379 | about ld.so. */ | |
1380 | if (target_has_execution) | |
1381 | { | |
a86988f2 PA |
1382 | /* Reset or free private data structures not associated with |
1383 | so_list entries. */ | |
1384 | ops->clear_solib (); | |
1385 | ||
1386 | /* Remove any previous solib event breakpoint. This is usually | |
1387 | done in common code, at breakpoint_init_inferior time, but | |
1388 | we're not really starting up the inferior here. */ | |
1389 | remove_solib_event_breakpoints (); | |
1390 | ||
268a4a75 | 1391 | solib_create_inferior_hook (from_tty); |
c8fa6cdd | 1392 | } |
268a4a75 JK |
1393 | |
1394 | /* Sometimes the platform-specific hook loads initial shared | |
1395 | libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be | |
1396 | incorrectly 0 but such solib targets should be fixed anyway. If we | |
1397 | made all the inferior hook methods consistent, this call could be | |
1398 | removed. Call it only after the solib target has been initialized by | |
1399 | solib_create_inferior_hook. */ | |
1400 | ||
1401 | solib_add (NULL, 0, NULL, auto_solib_add); | |
1402 | ||
a86988f2 PA |
1403 | breakpoint_re_set (); |
1404 | ||
1405 | /* We may have loaded or unloaded debug info for some (or all) | |
1406 | shared libraries. However, frames may still reference them. For | |
1407 | example, a frame's unwinder might still point at DWARF FDE | |
1408 | structures that are now freed. Also, getting new symbols may | |
1409 | change our opinion about what is frameless. */ | |
c8fa6cdd | 1410 | reinit_frame_cache (); |
a86988f2 PA |
1411 | |
1412 | ops->special_symbol_handling (); | |
cf466558 KB |
1413 | } |
1414 | ||
2938e6cf GB |
1415 | /* Wrapper for reload_shared_libraries that replaces "remote:" |
1416 | at the start of gdb_sysroot with "target:". */ | |
1417 | ||
1418 | static void | |
1419 | gdb_sysroot_changed (char *ignored, int from_tty, | |
1420 | struct cmd_list_element *e) | |
1421 | { | |
1422 | const char *old_prefix = "remote:"; | |
1423 | const char *new_prefix = TARGET_SYSROOT_PREFIX; | |
1424 | ||
1425 | if (startswith (gdb_sysroot, old_prefix)) | |
1426 | { | |
1427 | static int warning_issued = 0; | |
1428 | ||
1429 | gdb_assert (strlen (old_prefix) == strlen (new_prefix)); | |
1430 | memcpy (gdb_sysroot, new_prefix, strlen (new_prefix)); | |
1431 | ||
1432 | if (!warning_issued) | |
1433 | { | |
1434 | warning (_("\"%s\" is deprecated, use \"%s\" instead."), | |
1435 | old_prefix, new_prefix); | |
1436 | warning (_("sysroot set to \"%s\"."), gdb_sysroot); | |
1437 | ||
1438 | warning_issued = 1; | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | reload_shared_libraries (ignored, from_tty, e); | |
1443 | } | |
1444 | ||
920d2a44 AC |
1445 | static void |
1446 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1447 | struct cmd_list_element *c, const char *value) | |
1448 | { | |
1449 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
1450 | value); | |
1451 | } | |
1452 | ||
1453 | ||
3a40aaa0 UW |
1454 | /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call |
1455 | the library-specific handler if it is installed for the current target. */ | |
1456 | ||
1457 | struct symbol * | |
efad9b6a | 1458 | solib_global_lookup (struct objfile *objfile, |
3a40aaa0 | 1459 | const char *name, |
21b556f4 | 1460 | const domain_enum domain) |
3a40aaa0 | 1461 | { |
9c1877ea | 1462 | const struct target_so_ops *ops = solib_ops (get_objfile_arch (objfile)); |
3a40aaa0 | 1463 | |
e8a92f7b | 1464 | if (ops->lookup_lib_global_symbol != NULL) |
94af9270 | 1465 | return ops->lookup_lib_global_symbol (objfile, name, domain); |
3a40aaa0 UW |
1466 | return NULL; |
1467 | } | |
1468 | ||
cb457ae2 YQ |
1469 | /* Lookup the value for a specific symbol from dynamic symbol table. Look |
1470 | up symbol from ABFD. MATCH_SYM is a callback function to determine | |
1471 | whether to pick up a symbol. DATA is the input of this callback | |
1472 | function. Return NULL if symbol is not found. */ | |
1473 | ||
1474 | CORE_ADDR | |
1475 | gdb_bfd_lookup_symbol_from_symtab (bfd *abfd, | |
1476 | int (*match_sym) (asymbol *, void *), | |
1477 | void *data) | |
1478 | { | |
1479 | long storage_needed = bfd_get_symtab_upper_bound (abfd); | |
1480 | CORE_ADDR symaddr = 0; | |
1481 | ||
1482 | if (storage_needed > 0) | |
1483 | { | |
1484 | unsigned int i; | |
1485 | ||
1486 | asymbol **symbol_table = (asymbol **) xmalloc (storage_needed); | |
1487 | struct cleanup *back_to = make_cleanup (xfree, symbol_table); | |
1488 | unsigned int number_of_symbols = | |
1489 | bfd_canonicalize_symtab (abfd, symbol_table); | |
1490 | ||
1491 | for (i = 0; i < number_of_symbols; i++) | |
1492 | { | |
1493 | asymbol *sym = *symbol_table++; | |
1494 | ||
1495 | if (match_sym (sym, data)) | |
1496 | { | |
3e29f34a MR |
1497 | struct gdbarch *gdbarch = target_gdbarch (); |
1498 | symaddr = sym->value; | |
1499 | ||
1500 | /* Some ELF targets fiddle with addresses of symbols they | |
1501 | consider special. They use minimal symbols to do that | |
1502 | and this is needed for correct breakpoint placement, | |
1503 | but we do not have full data here to build a complete | |
1504 | minimal symbol, so just set the address and let the | |
1505 | targets cope with that. */ | |
1506 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
1507 | && gdbarch_elf_make_msymbol_special_p (gdbarch)) | |
1508 | { | |
1509 | struct minimal_symbol msym; | |
1510 | ||
1511 | memset (&msym, 0, sizeof (msym)); | |
1512 | SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr); | |
1513 | gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym); | |
1514 | symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym); | |
1515 | } | |
1516 | ||
cb457ae2 | 1517 | /* BFD symbols are section relative. */ |
3e29f34a | 1518 | symaddr += sym->section->vma; |
cb457ae2 YQ |
1519 | break; |
1520 | } | |
1521 | } | |
1522 | do_cleanups (back_to); | |
1523 | } | |
1524 | ||
1525 | return symaddr; | |
1526 | } | |
1527 | ||
1528 | /* Lookup the value for a specific symbol from symbol table. Look up symbol | |
1529 | from ABFD. MATCH_SYM is a callback function to determine whether to pick | |
1530 | up a symbol. DATA is the input of this callback function. Return NULL | |
1531 | if symbol is not found. */ | |
1532 | ||
1533 | static CORE_ADDR | |
1534 | bfd_lookup_symbol_from_dyn_symtab (bfd *abfd, | |
1535 | int (*match_sym) (asymbol *, void *), | |
1536 | void *data) | |
1537 | { | |
1538 | long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd); | |
1539 | CORE_ADDR symaddr = 0; | |
1540 | ||
1541 | if (storage_needed > 0) | |
1542 | { | |
1543 | unsigned int i; | |
1544 | asymbol **symbol_table = (asymbol **) xmalloc (storage_needed); | |
1545 | struct cleanup *back_to = make_cleanup (xfree, symbol_table); | |
1546 | unsigned int number_of_symbols = | |
1547 | bfd_canonicalize_dynamic_symtab (abfd, symbol_table); | |
1548 | ||
1549 | for (i = 0; i < number_of_symbols; i++) | |
1550 | { | |
1551 | asymbol *sym = *symbol_table++; | |
1552 | ||
1553 | if (match_sym (sym, data)) | |
1554 | { | |
1555 | /* BFD symbols are section relative. */ | |
1556 | symaddr = sym->value + sym->section->vma; | |
1557 | break; | |
1558 | } | |
1559 | } | |
1560 | do_cleanups (back_to); | |
1561 | } | |
1562 | return symaddr; | |
1563 | } | |
1564 | ||
1565 | /* Lookup the value for a specific symbol from symbol table and dynamic | |
1566 | symbol table. Look up symbol from ABFD. MATCH_SYM is a callback | |
1567 | function to determine whether to pick up a symbol. DATA is the | |
1568 | input of this callback function. Return NULL if symbol is not | |
1569 | found. */ | |
1570 | ||
1571 | CORE_ADDR | |
1572 | gdb_bfd_lookup_symbol (bfd *abfd, | |
1573 | int (*match_sym) (asymbol *, void *), | |
1574 | void *data) | |
1575 | { | |
1576 | CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data); | |
1577 | ||
1578 | /* On FreeBSD, the dynamic linker is stripped by default. So we'll | |
1579 | have to check the dynamic string table too. */ | |
1580 | if (symaddr == 0) | |
1581 | symaddr = bfd_lookup_symbol_from_dyn_symtab (abfd, match_sym, data); | |
1582 | ||
1583 | return symaddr; | |
1584 | } | |
3a40aaa0 | 1585 | |
63644780 NB |
1586 | /* SO_LIST_HEAD may contain user-loaded object files that can be removed |
1587 | out-of-band by the user. So upon notification of free_objfile remove | |
1588 | all references to any user-loaded file that is about to be freed. */ | |
1589 | ||
1590 | static void | |
1591 | remove_user_added_objfile (struct objfile *objfile) | |
1592 | { | |
1593 | struct so_list *so; | |
1594 | ||
1595 | if (objfile != 0 && objfile->flags & OBJF_USERLOADED) | |
1596 | { | |
1597 | for (so = so_list_head; so != NULL; so = so->next) | |
1598 | if (so->objfile == objfile) | |
1599 | so->objfile = NULL; | |
1600 | } | |
1601 | } | |
1602 | ||
a78f21af AC |
1603 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
1604 | ||
c906108c | 1605 | void |
fba45db2 | 1606 | _initialize_solib (void) |
c906108c | 1607 | { |
66aba65d MK |
1608 | solib_data = gdbarch_data_register_pre_init (solib_init); |
1609 | ||
63644780 NB |
1610 | observer_attach_free_objfile (remove_user_added_objfile); |
1611 | ||
c906108c | 1612 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1613 | _("Load shared object library symbols for files matching REGEXP.")); |
c5aa993b | 1614 | add_info ("sharedlibrary", info_sharedlibrary_command, |
1bedd215 | 1615 | _("Status of loaded shared object libraries.")); |
c60a7562 | 1616 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1617 | _("Unload all shared object library symbols.")); |
c906108c | 1618 | |
5bf193a2 AC |
1619 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1620 | &auto_solib_add, _("\ | |
1621 | Set autoloading of shared library symbols."), _("\ | |
1622 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1623 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1624 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1625 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
3e43a32a MS |
1626 | inferior. Otherwise, symbols must be loaded manually, using \ |
1627 | `sharedlibrary'."), | |
5bf193a2 | 1628 | NULL, |
920d2a44 | 1629 | show_auto_solib_add, |
5bf193a2 | 1630 | &setlist, &showlist); |
c906108c | 1631 | |
811a659a GB |
1632 | add_setshow_optional_filename_cmd ("sysroot", class_support, |
1633 | &gdb_sysroot, _("\ | |
f822c95b DJ |
1634 | Set an alternate system root."), _("\ |
1635 | Show the current system root."), _("\ | |
1636 | The system root is used to load absolute shared library symbol files.\n\ | |
1637 | For other (relative) files, you can add directories using\n\ | |
1638 | `set solib-search-path'."), | |
2938e6cf | 1639 | gdb_sysroot_changed, |
811a659a GB |
1640 | NULL, |
1641 | &setlist, &showlist); | |
c906108c | 1642 | |
f822c95b DJ |
1643 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, |
1644 | &setlist); | |
1645 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, | |
1646 | &showlist); | |
030292b7 | 1647 | |
525226b5 AC |
1648 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1649 | &solib_search_path, _("\ | |
3e43a32a MS |
1650 | Set the search path for loading non-absolute shared library symbol files."), |
1651 | _("\ | |
1652 | Show the search path for loading non-absolute shared library symbol files."), | |
1653 | _("\ | |
1654 | This takes precedence over the environment variables \ | |
1655 | PATH and LD_LIBRARY_PATH."), | |
525226b5 | 1656 | reload_shared_libraries, |
920d2a44 | 1657 | show_solib_search_path, |
525226b5 | 1658 | &setlist, &showlist); |
c906108c | 1659 | } |