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 | |
c906108c SS |
92 | /* Local function prototypes */ |
93 | ||
c906108c SS |
94 | /* If non-empty, this is a search path for loading non-absolute shared library |
95 | symbol files. This takes precedence over the environment variables PATH | |
96 | and LD_LIBRARY_PATH. */ | |
97 | static char *solib_search_path = NULL; | |
920d2a44 AC |
98 | static void |
99 | show_solib_search_path (struct ui_file *file, int from_tty, | |
100 | struct cmd_list_element *c, const char *value) | |
101 | { | |
3e43a32a MS |
102 | fprintf_filtered (file, _("The search path for loading non-absolute " |
103 | "shared library symbol files is %s.\n"), | |
920d2a44 AC |
104 | value); |
105 | } | |
c906108c | 106 | |
ab38a727 PA |
107 | /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */ |
108 | #if (HAVE_DOS_BASED_FILE_SYSTEM) | |
109 | # define DOS_BASED_FILE_SYSTEM 1 | |
110 | #else | |
111 | # define DOS_BASED_FILE_SYSTEM 0 | |
112 | #endif | |
113 | ||
af1900b0 GB |
114 | /* Return the full pathname of a binary file (the main executable |
115 | or a shared library file), or NULL if not found. The returned | |
998d2a3e GB |
116 | pathname is malloc'ed and must be freed by the caller. If FD |
117 | is non-NULL, *FD is set to either -1 or an open file handle for | |
118 | the binary file. | |
e4f7b8c8 | 119 | |
f822c95b | 120 | Global variable GDB_SYSROOT is used as a prefix directory |
af1900b0 | 121 | to search for binary files 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 | 130 | shared libraries if not found in either the sysroot (if set) or |
af1900b0 GB |
131 | the local filesystem. SOLIB_SEARCH_PATH is not used when searching |
132 | for the main executable. | |
e4f7b8c8 | 133 | |
c8c18e65 | 134 | Search algorithm: |
b57fbfba GB |
135 | * If a sysroot is set and path is absolute: |
136 | * Search for sysroot/path. | |
c8c18e65 KW |
137 | * else |
138 | * Look for it literally (unmodified). | |
af1900b0 GB |
139 | * If IS_SOLIB is non-zero: |
140 | * Look in SOLIB_SEARCH_PATH. | |
141 | * If available, use target defined search function. | |
b57fbfba | 142 | * If NO sysroot is set, perform the following two searches: |
c8c18e65 | 143 | * Look in inferior's $PATH. |
af1900b0 GB |
144 | * If IS_SOLIB is non-zero: |
145 | * Look in inferior's $LD_LIBRARY_PATH. | |
ab38a727 | 146 | * |
c8c18e65 | 147 | * The last check avoids doing this search when targetting remote |
b57fbfba | 148 | * machines since a sysroot will almost always be set. |
7f86f058 | 149 | */ |
e4f7b8c8 | 150 | |
af1900b0 | 151 | static char * |
992f1ddc | 152 | solib_find_1 (const char *in_pathname, int *fd, int is_solib) |
e4f7b8c8 | 153 | { |
3641da11 | 154 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
e4f7b8c8 MS |
155 | int found_file = -1; |
156 | char *temp_pathname = NULL; | |
ab38a727 PA |
157 | const char *fskind = effective_target_file_system_kind (); |
158 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); | |
b57fbfba | 159 | char *sysroot = gdb_sysroot; |
f8773be1 | 160 | int prefix_len, orig_prefix_len; |
08105857 | 161 | |
a3be80c3 GB |
162 | /* If the absolute prefix starts with "target:" but the filesystem |
163 | accessed by the target_fileio_* methods is the local filesystem | |
164 | then we strip the "target:" prefix now and work with the local | |
165 | filesystem. This ensures that the same search algorithm is used | |
166 | for all local files regardless of whether a "target:" prefix was | |
167 | used. */ | |
168 | if (is_target_filename (sysroot) && target_filesystem_is_local ()) | |
169 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
170 | ||
f8773be1 GB |
171 | /* Strip any trailing slashes from the absolute prefix. */ |
172 | prefix_len = orig_prefix_len = strlen (sysroot); | |
f1d10cfb | 173 | |
f8773be1 GB |
174 | while (prefix_len > 0 && IS_DIR_SEPARATOR (sysroot[prefix_len - 1])) |
175 | prefix_len--; | |
f1d10cfb | 176 | |
f8773be1 GB |
177 | if (prefix_len == 0) |
178 | sysroot = NULL; | |
179 | else if (prefix_len != orig_prefix_len) | |
180 | { | |
b57fbfba | 181 | sysroot = savestring (sysroot, prefix_len); |
ab38a727 PA |
182 | make_cleanup (xfree, sysroot); |
183 | } | |
184 | ||
185 | /* If we're on a non-DOS-based system, backslashes won't be | |
186 | understood as directory separator, so, convert them to forward | |
187 | slashes, iff we're supposed to handle DOS-based file system | |
188 | semantics for target paths. */ | |
189 | if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based) | |
190 | { | |
191 | char *p; | |
192 | ||
193 | /* Avoid clobbering our input. */ | |
224c3ddb | 194 | p = (char *) alloca (strlen (in_pathname) + 1); |
ab38a727 PA |
195 | strcpy (p, in_pathname); |
196 | in_pathname = p; | |
197 | ||
198 | for (; *p; p++) | |
199 | { | |
200 | if (*p == '\\') | |
201 | *p = '/'; | |
202 | } | |
203 | } | |
204 | ||
205 | /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not | |
206 | IS_ABSOLUTE_PATH. The latter is for host paths only, while | |
207 | IN_PATHNAME is a target path. For example, if we're supposed to | |
208 | be handling DOS-like semantics we want to consider a | |
209 | 'c:/foo/bar.dll' path as an absolute path, even on a Unix box. | |
210 | With such a path, before giving up on the sysroot, we'll try: | |
211 | ||
212 | 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll | |
213 | 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll | |
214 | 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll | |
215 | */ | |
216 | ||
b57fbfba | 217 | if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL) |
ab38a727 PA |
218 | temp_pathname = xstrdup (in_pathname); |
219 | else | |
220 | { | |
221 | int need_dir_separator; | |
222 | ||
3736004f PA |
223 | /* Concatenate the sysroot and the target reported filename. We |
224 | may need to glue them with a directory separator. Cases to | |
225 | consider: | |
226 | ||
227 | | sysroot | separator | in_pathname | | |
228 | |-----------------+-----------+----------------| | |
229 | | /some/dir | / | c:/foo/bar.dll | | |
230 | | /some/dir | | /foo/bar.dll | | |
2938e6cf GB |
231 | | target: | | c:/foo/bar.dll | |
232 | | target: | | /foo/bar.dll | | |
233 | | target:some/dir | / | c:/foo/bar.dll | | |
234 | | target:some/dir | | /foo/bar.dll | | |
3736004f PA |
235 | |
236 | IOW, we don't need to add a separator if IN_PATHNAME already | |
2938e6cf | 237 | has one, or when the the sysroot is exactly "target:". |
3736004f PA |
238 | There's no need to check for drive spec explicitly, as we only |
239 | get here if IN_PATHNAME is considered an absolute path. */ | |
240 | need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0]) | |
2938e6cf | 241 | || strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0); |
ab38a727 | 242 | |
f1d10cfb | 243 | /* Cat the prefixed pathname together. */ |
ab38a727 PA |
244 | temp_pathname = concat (sysroot, |
245 | need_dir_separator ? SLASH_STRING : "", | |
246 | in_pathname, (char *) NULL); | |
e4f7b8c8 MS |
247 | } |
248 | ||
2938e6cf GB |
249 | /* Handle files to be accessed via the target. */ |
250 | if (is_target_filename (temp_pathname)) | |
f1838a98 | 251 | { |
998d2a3e GB |
252 | if (fd != NULL) |
253 | *fd = -1; | |
f748fb40 | 254 | do_cleanups (old_chain); |
ab38a727 | 255 | return temp_pathname; |
f1838a98 UW |
256 | } |
257 | ||
f1d10cfb | 258 | /* Now see if we can open it. */ |
614c279d | 259 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
260 | if (found_file < 0) |
261 | xfree (temp_pathname); | |
262 | ||
263 | /* If the search in gdb_sysroot failed, and the path name has a | |
264 | drive spec (e.g, c:/foo), try stripping ':' from the drive spec, | |
265 | and retrying in the sysroot: | |
266 | c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */ | |
f1d10cfb | 267 | |
ab38a727 | 268 | if (found_file < 0 |
b57fbfba | 269 | && sysroot != NULL |
ab38a727 PA |
270 | && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname)) |
271 | { | |
272 | int need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]); | |
273 | char *drive = savestring (in_pathname, 1); | |
274 | ||
275 | temp_pathname = concat (sysroot, | |
276 | SLASH_STRING, | |
277 | drive, | |
278 | need_dir_separator ? SLASH_STRING : "", | |
279 | in_pathname + 2, (char *) NULL); | |
280 | xfree (drive); | |
281 | ||
614c279d | 282 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
283 | if (found_file < 0) |
284 | { | |
ab38a727 PA |
285 | xfree (temp_pathname); |
286 | ||
287 | /* If the search in gdb_sysroot still failed, try fully | |
288 | stripping the drive spec, and trying once more in the | |
289 | sysroot before giving up. | |
290 | ||
291 | c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */ | |
292 | ||
293 | temp_pathname = concat (sysroot, | |
294 | need_dir_separator ? SLASH_STRING : "", | |
295 | in_pathname + 2, (char *) NULL); | |
296 | ||
614c279d | 297 | found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0); |
ab38a727 PA |
298 | if (found_file < 0) |
299 | xfree (temp_pathname); | |
300 | } | |
301 | } | |
0997b535 | 302 | |
ab38a727 PA |
303 | do_cleanups (old_chain); |
304 | ||
305 | /* We try to find the library in various ways. After each attempt, | |
306 | either found_file >= 0 and temp_pathname is a malloc'd string, or | |
307 | found_file < 0 and temp_pathname does not point to storage that | |
308 | needs to be freed. */ | |
309 | ||
310 | if (found_file < 0) | |
311 | temp_pathname = NULL; | |
312 | ||
f822c95b | 313 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
314 | absolute at this point, make it relative. (openp will try and open the |
315 | file according to its absolute path otherwise, which is not what we want.) | |
316 | Affects subsequent searches for this solib. */ | |
ab38a727 | 317 | if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
ba5f0d88 OF |
318 | { |
319 | /* First, get rid of any drive letters etc. */ | |
ab38a727 PA |
320 | while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
321 | in_pathname++; | |
ba5f0d88 OF |
322 | |
323 | /* Next, get rid of all leading dir separators. */ | |
ab38a727 PA |
324 | while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname)) |
325 | in_pathname++; | |
ba5f0d88 | 326 | } |
ab38a727 | 327 | |
af1900b0 GB |
328 | /* If not found, and we're looking for a solib, search the |
329 | solib_search_path (if any). */ | |
330 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
331 | found_file = openp (solib_search_path, |
332 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
fbdebf46 | 333 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ab38a727 | 334 | |
af1900b0 GB |
335 | /* If not found, and we're looking for a solib, next search the |
336 | solib_search_path (if any) for the basename only (ignoring the | |
337 | path). This is to allow reading solibs from a path that differs | |
338 | from the opened path. */ | |
339 | if (is_solib && found_file < 0 && solib_search_path != NULL) | |
492c0ab7 JK |
340 | found_file = openp (solib_search_path, |
341 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, | |
ab38a727 PA |
342 | target_lbasename (fskind, in_pathname), |
343 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 344 | |
af1900b0 GB |
345 | /* If not found, and we're looking for a solib, try to use target |
346 | supplied solib search method. */ | |
347 | if (is_solib && found_file < 0 && ops->find_and_open_solib) | |
637d6690 | 348 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 349 | &temp_pathname); |
2610b0bf | 350 | |
c378eb4e | 351 | /* If not found, next search the inferior's $PATH environment variable. */ |
b57fbfba | 352 | if (found_file < 0 && sysroot == NULL) |
9a6c7d9c | 353 | found_file = openp (current_inferior ()->environment.get ("PATH"), |
492c0ab7 JK |
354 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
355 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 356 | |
af1900b0 GB |
357 | /* If not found, and we're looking for a solib, next search the |
358 | inferior's $LD_LIBRARY_PATH environment variable. */ | |
359 | if (is_solib && found_file < 0 && sysroot == NULL) | |
9a6c7d9c SDJ |
360 | found_file = openp (current_inferior ()->environment.get |
361 | ("LD_LIBRARY_PATH"), | |
492c0ab7 JK |
362 | OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname, |
363 | O_RDONLY | O_BINARY, &temp_pathname); | |
e4f7b8c8 | 364 | |
998d2a3e GB |
365 | if (fd == NULL) |
366 | { | |
367 | if (found_file >= 0) | |
368 | close (found_file); | |
369 | } | |
370 | else | |
371 | *fd = found_file; | |
372 | ||
572d275c UW |
373 | return temp_pathname; |
374 | } | |
375 | ||
af1900b0 GB |
376 | /* Return the full pathname of the main executable, or NULL if not |
377 | found. The returned pathname is malloc'ed and must be freed by | |
998d2a3e | 378 | the caller. If FD is non-NULL, *FD is set to either -1 or an open |
ecf45d2c | 379 | file handle for the main executable. */ |
af1900b0 GB |
380 | |
381 | char * | |
992f1ddc | 382 | exec_file_find (const char *in_pathname, int *fd) |
af1900b0 | 383 | { |
ecf45d2c SL |
384 | char *result; |
385 | const char *fskind = effective_target_file_system_kind (); | |
386 | ||
387 | if (in_pathname == NULL) | |
388 | return NULL; | |
af1900b0 | 389 | |
ecf45d2c | 390 | if (*gdb_sysroot != '\0' && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname)) |
af1900b0 | 391 | { |
ecf45d2c | 392 | result = solib_find_1 (in_pathname, fd, 0); |
af1900b0 | 393 | |
ecf45d2c | 394 | if (result == NULL && fskind == file_system_kind_dos_based) |
af1900b0 GB |
395 | { |
396 | char *new_pathname; | |
397 | ||
224c3ddb | 398 | new_pathname = (char *) alloca (strlen (in_pathname) + 5); |
af1900b0 GB |
399 | strcpy (new_pathname, in_pathname); |
400 | strcat (new_pathname, ".exe"); | |
401 | ||
402 | result = solib_find_1 (new_pathname, fd, 0); | |
403 | } | |
404 | } | |
ecf45d2c SL |
405 | else |
406 | { | |
407 | /* It's possible we don't have a full path, but rather just a | |
408 | filename. Some targets, such as HP-UX, don't provide the | |
409 | full path, sigh. | |
410 | ||
411 | Attempt to qualify the filename against the source path. | |
412 | (If that fails, we'll just fall back on the original | |
413 | filename. Not much more we can do...) */ | |
414 | ||
415 | if (!source_full_path_of (in_pathname, &result)) | |
416 | result = xstrdup (in_pathname); | |
417 | if (fd != NULL) | |
418 | *fd = -1; | |
419 | } | |
af1900b0 GB |
420 | |
421 | return result; | |
422 | } | |
423 | ||
424 | /* Return the full pathname of a shared library file, or NULL if not | |
425 | found. The returned pathname is malloc'ed and must be freed by | |
998d2a3e GB |
426 | the caller. If FD is non-NULL, *FD is set to either -1 or an open |
427 | file handle for the shared library. | |
af1900b0 GB |
428 | |
429 | The search algorithm used is described in solib_find_1's comment | |
430 | above. */ | |
431 | ||
432 | char * | |
992f1ddc | 433 | solib_find (const char *in_pathname, int *fd) |
af1900b0 GB |
434 | { |
435 | const char *solib_symbols_extension | |
436 | = gdbarch_solib_symbols_extension (target_gdbarch ()); | |
437 | ||
438 | /* If solib_symbols_extension is set, replace the file's | |
439 | extension. */ | |
440 | if (solib_symbols_extension != NULL) | |
441 | { | |
992f1ddc | 442 | const char *p = in_pathname + strlen (in_pathname); |
af1900b0 GB |
443 | |
444 | while (p > in_pathname && *p != '.') | |
445 | p--; | |
446 | ||
447 | if (*p == '.') | |
448 | { | |
449 | char *new_pathname; | |
450 | ||
224c3ddb SM |
451 | new_pathname |
452 | = (char *) alloca (p - in_pathname + 1 | |
453 | + strlen (solib_symbols_extension) + 1); | |
af1900b0 GB |
454 | memcpy (new_pathname, in_pathname, p - in_pathname + 1); |
455 | strcpy (new_pathname + (p - in_pathname) + 1, | |
456 | solib_symbols_extension); | |
457 | ||
458 | in_pathname = new_pathname; | |
459 | } | |
460 | } | |
461 | ||
462 | return solib_find_1 (in_pathname, fd, 1); | |
463 | } | |
464 | ||
572d275c UW |
465 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, |
466 | it is used as file handle to open the file. Throws an error if the file | |
467 | could not be opened. Handles both local and remote file access. | |
468 | ||
a4453b7e TT |
469 | PATHNAME must be malloc'ed by the caller. It will be freed by this |
470 | function. If unsuccessful, the FD will be closed (unless FD was | |
471 | -1). */ | |
572d275c | 472 | |
192b62ce | 473 | gdb_bfd_ref_ptr |
572d275c UW |
474 | solib_bfd_fopen (char *pathname, int fd) |
475 | { | |
192b62ce | 476 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (pathname, gnutarget, fd)); |
572d275c | 477 | |
192b62ce TT |
478 | if (abfd != NULL && !gdb_bfd_has_target_filename (abfd.get ())) |
479 | bfd_set_cacheable (abfd.get (), 1); | |
f1838a98 | 480 | |
192b62ce | 481 | if (abfd == NULL) |
f1838a98 | 482 | { |
572d275c | 483 | make_cleanup (xfree, pathname); |
f1838a98 | 484 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 485 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
486 | } |
487 | ||
a4453b7e TT |
488 | xfree (pathname); |
489 | ||
520b0001 | 490 | return abfd; |
572d275c UW |
491 | } |
492 | ||
493 | /* Find shared library PATHNAME and open a BFD for it. */ | |
494 | ||
192b62ce | 495 | gdb_bfd_ref_ptr |
572d275c UW |
496 | solib_bfd_open (char *pathname) |
497 | { | |
572d275c UW |
498 | char *found_pathname; |
499 | int found_file; | |
378d2b72 | 500 | const struct bfd_arch_info *b; |
572d275c | 501 | |
572d275c UW |
502 | /* Search for shared library file. */ |
503 | found_pathname = solib_find (pathname, &found_file); | |
504 | if (found_pathname == NULL) | |
048d532d PA |
505 | { |
506 | /* Return failure if the file could not be found, so that we can | |
507 | accumulate messages about missing libraries. */ | |
508 | if (errno == ENOENT) | |
509 | return NULL; | |
510 | ||
511 | perror_with_name (pathname); | |
512 | } | |
572d275c UW |
513 | |
514 | /* Open bfd for shared library. */ | |
192b62ce | 515 | gdb_bfd_ref_ptr abfd (solib_bfd_fopen (found_pathname, found_file)); |
572d275c UW |
516 | |
517 | /* Check bfd format. */ | |
192b62ce TT |
518 | if (!bfd_check_format (abfd.get (), bfd_object)) |
519 | error (_("`%s': not in executable format: %s"), | |
520 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
f1838a98 | 521 | |
378d2b72 | 522 | /* Check bfd arch. */ |
f5656ead | 523 | b = gdbarch_bfd_arch_info (target_gdbarch ()); |
192b62ce | 524 | if (!b->compatible (b, bfd_get_arch_info (abfd.get ()))) |
378d2b72 | 525 | warning (_("`%s': Shared library architecture %s is not compatible " |
a4453b7e | 526 | "with target architecture %s."), bfd_get_filename (abfd), |
192b62ce TT |
527 | bfd_get_arch_info (abfd.get ())->printable_name, |
528 | b->printable_name); | |
378d2b72 | 529 | |
f1838a98 | 530 | return abfd; |
e4f7b8c8 MS |
531 | } |
532 | ||
7f86f058 PA |
533 | /* Given a pointer to one of the shared objects in our list of mapped |
534 | objects, use the recorded name to open a bfd descriptor for the | |
535 | object, build a section table, relocate all the section addresses | |
536 | by the base address at which the shared object was mapped, and then | |
537 | add the sections to the target's section table. | |
e4f7b8c8 | 538 | |
7f86f058 PA |
539 | FIXME: In most (all?) cases the shared object file name recorded in |
540 | the dynamic linkage tables will be a fully qualified pathname. For | |
c5aa993b JM |
541 | cases where it isn't, do we really mimic the systems search |
542 | mechanism correctly in the below code (particularly the tilde | |
7f86f058 | 543 | expansion stuff?). */ |
c906108c SS |
544 | |
545 | static int | |
048d532d | 546 | solib_map_sections (struct so_list *so) |
c906108c | 547 | { |
3641da11 | 548 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
0542c86d | 549 | struct target_section *p; |
c5aa993b | 550 | |
ee0c3293 TT |
551 | gdb::unique_xmalloc_ptr<char> filename (tilde_expand (so->so_name)); |
552 | gdb_bfd_ref_ptr abfd (ops->bfd_open (filename.get ())); | |
e4f7b8c8 | 553 | |
048d532d PA |
554 | if (abfd == NULL) |
555 | return 0; | |
556 | ||
13437d4b | 557 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
192b62ce | 558 | so->abfd = abfd.release (); |
23e04971 | 559 | |
b030cf11 JB |
560 | /* Copy the full path name into so_name, allowing symbol_file_add |
561 | to find it later. This also affects the =library-loaded GDB/MI | |
562 | event, and in particular the part of that notification providing | |
563 | the library's host-side path. If we let the target dictate | |
564 | that objfile's path, and the target is different from the host, | |
565 | GDB/MI will not provide the correct host-side path. */ | |
192b62ce | 566 | if (strlen (bfd_get_filename (so->abfd)) >= SO_NAME_MAX_PATH_SIZE) |
b030cf11 | 567 | error (_("Shared library file name is too long.")); |
192b62ce | 568 | strcpy (so->so_name, bfd_get_filename (so->abfd)); |
b030cf11 | 569 | |
192b62ce | 570 | if (build_section_table (so->abfd, &so->sections, &so->sections_end)) |
23e04971 | 571 | { |
8a3fe4f8 | 572 | error (_("Can't find the file sections in `%s': %s"), |
192b62ce | 573 | bfd_get_filename (so->abfd), bfd_errmsg (bfd_get_error ())); |
23e04971 | 574 | } |
104c1213 | 575 | |
13437d4b | 576 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 577 | { |
13437d4b KB |
578 | /* Relocate the section binding addresses as recorded in the shared |
579 | object's file by the base address to which the object was actually | |
c378eb4e | 580 | mapped. */ |
66aba65d | 581 | ops->relocate_section_addresses (so, p); |
cfa9d6d9 DJ |
582 | |
583 | /* If the target didn't provide information about the address | |
584 | range of the shared object, assume we want the location of | |
585 | the .text section. */ | |
586 | if (so->addr_low == 0 && so->addr_high == 0 | |
587 | && strcmp (p->the_bfd_section->name, ".text") == 0) | |
13437d4b | 588 | { |
cfa9d6d9 DJ |
589 | so->addr_low = p->addr; |
590 | so->addr_high = p->endaddr; | |
13437d4b | 591 | } |
104c1213 JM |
592 | } |
593 | ||
048d532d PA |
594 | /* Add the shared object's sections to the current set of file |
595 | section tables. Do this immediately after mapping the object so | |
596 | that later nodes in the list can query this object, as is needed | |
597 | in solib-osf.c. */ | |
ed9eebaf | 598 | add_target_sections (so, so->sections, so->sections_end); |
048d532d PA |
599 | |
600 | return 1; | |
104c1213 | 601 | } |
c906108c | 602 | |
0892cb63 DE |
603 | /* Free symbol-file related contents of SO and reset for possible reloading |
604 | of SO. If we have opened a BFD for SO, close it. If we have placed SO's | |
605 | sections in some target's section table, the caller is responsible for | |
606 | removing them. | |
a86988f2 PA |
607 | |
608 | This function doesn't mess with objfiles at all. If there is an | |
609 | objfile associated with SO that needs to be removed, the caller is | |
610 | responsible for taking care of that. */ | |
611 | ||
612 | static void | |
0892cb63 | 613 | clear_so (struct so_list *so) |
a86988f2 | 614 | { |
3641da11 | 615 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
0892cb63 | 616 | |
a86988f2 PA |
617 | if (so->sections) |
618 | { | |
619 | xfree (so->sections); | |
620 | so->sections = so->sections_end = NULL; | |
621 | } | |
622 | ||
623 | gdb_bfd_unref (so->abfd); | |
624 | so->abfd = NULL; | |
625 | ||
626 | /* Our caller closed the objfile, possibly via objfile_purge_solibs. */ | |
627 | so->symbols_loaded = 0; | |
628 | so->objfile = NULL; | |
629 | ||
630 | so->addr_low = so->addr_high = 0; | |
631 | ||
632 | /* Restore the target-supplied file name. SO_NAME may be the path | |
633 | of the symbol file. */ | |
634 | strcpy (so->so_name, so->so_original_name); | |
0892cb63 DE |
635 | |
636 | /* Do the same for target-specific data. */ | |
637 | if (ops->clear_so != NULL) | |
638 | ops->clear_so (so); | |
a86988f2 PA |
639 | } |
640 | ||
7f86f058 | 641 | /* Free the storage associated with the `struct so_list' object SO. |
c378eb4e | 642 | If we have opened a BFD for SO, close it. |
c906108c | 643 | |
07cd4b97 JB |
644 | The caller is responsible for removing SO from whatever list it is |
645 | a member of. If we have placed SO's sections in some target's | |
646 | section table, the caller is responsible for removing them. | |
c906108c | 647 | |
07cd4b97 JB |
648 | This function doesn't mess with objfiles at all. If there is an |
649 | objfile associated with SO that needs to be removed, the caller is | |
650 | responsible for taking care of that. */ | |
651 | ||
13437d4b | 652 | void |
07cd4b97 | 653 | free_so (struct so_list *so) |
c906108c | 654 | { |
3641da11 | 655 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
c5aa993b | 656 | |
0892cb63 | 657 | clear_so (so); |
66aba65d | 658 | ops->free_so (so); |
07cd4b97 | 659 | |
b8c9b27d | 660 | xfree (so); |
c906108c SS |
661 | } |
662 | ||
07cd4b97 | 663 | |
f8766ec1 KB |
664 | /* Return address of first so_list entry in master shared object list. */ |
665 | struct so_list * | |
666 | master_so_list (void) | |
667 | { | |
668 | return so_list_head; | |
669 | } | |
670 | ||
7eedccfa PP |
671 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
672 | be chatty about it. Return non-zero if any symbols were actually | |
42a6e6a0 MK |
673 | loaded. */ |
674 | ||
675 | int | |
b15cc25c | 676 | solib_read_symbols (struct so_list *so, symfile_add_flags flags) |
42a6e6a0 MK |
677 | { |
678 | if (so->symbols_loaded) | |
679 | { | |
a86988f2 | 680 | /* If needed, we've already warned in our caller. */ |
42a6e6a0 | 681 | } |
8bb75286 DJ |
682 | else if (so->abfd == NULL) |
683 | { | |
048d532d PA |
684 | /* We've already warned about this library, when trying to open |
685 | it. */ | |
8bb75286 | 686 | } |
42a6e6a0 MK |
687 | else |
688 | { | |
048d532d | 689 | |
7dcd53a0 TT |
690 | flags |= current_inferior ()->symfile_flags; |
691 | ||
492d29ea | 692 | TRY |
048d532d PA |
693 | { |
694 | struct section_addr_info *sap; | |
695 | ||
696 | /* Have we already loaded this shared object? */ | |
697 | ALL_OBJFILES (so->objfile) | |
698 | { | |
4262abfb | 699 | if (filename_cmp (objfile_name (so->objfile), so->so_name) == 0 |
e4f6d2ec | 700 | && so->objfile->addr_low == so->addr_low) |
048d532d PA |
701 | break; |
702 | } | |
9c6595ab PA |
703 | if (so->objfile == NULL) |
704 | { | |
705 | sap = build_section_addr_info_from_section_table (so->sections, | |
706 | so->sections_end); | |
707 | so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name, | |
708 | flags, sap, OBJF_SHARED, | |
709 | NULL); | |
710 | so->objfile->addr_low = so->addr_low; | |
711 | free_section_addr_info (sap); | |
712 | } | |
492d29ea PA |
713 | |
714 | so->symbols_loaded = 1; | |
715 | } | |
716 | CATCH (e, RETURN_MASK_ERROR) | |
717 | { | |
718 | exception_fprintf (gdb_stderr, e, _("Error while reading shared" | |
719 | " library symbols for %s:\n"), | |
720 | so->so_name); | |
048d532d | 721 | } |
492d29ea | 722 | END_CATCH |
048d532d | 723 | |
7eedccfa | 724 | return 1; |
42a6e6a0 MK |
725 | } |
726 | ||
727 | return 0; | |
728 | } | |
c906108c | 729 | |
59145f8c AR |
730 | /* Return 1 if KNOWN->objfile is used by any other so_list object in the |
731 | SO_LIST_HEAD list. Return 0 otherwise. */ | |
732 | ||
733 | static int | |
734 | solib_used (const struct so_list *const known) | |
735 | { | |
736 | const struct so_list *pivot; | |
737 | ||
738 | for (pivot = so_list_head; pivot != NULL; pivot = pivot->next) | |
739 | if (pivot != known && pivot->objfile == known->objfile) | |
740 | return 1; | |
741 | return 0; | |
742 | } | |
743 | ||
51457a05 | 744 | /* See solib.h. */ |
c906108c | 745 | |
e696b3ad MAL |
746 | void |
747 | update_solib_list (int from_tty) | |
07cd4b97 | 748 | { |
3641da11 | 749 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 750 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
751 | struct so_list *gdb, **gdb_link; |
752 | ||
181e7f93 PA |
753 | /* We can reach here due to changing solib-search-path or the |
754 | sysroot, before having any inferior. */ | |
50c71eaf | 755 | if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid)) |
181e7f93 PA |
756 | { |
757 | struct inferior *inf = current_inferior (); | |
758 | ||
759 | /* If we are attaching to a running process for which we | |
760 | have not opened a symbol file, we may be able to get its | |
761 | symbols now! */ | |
762 | if (inf->attach_flag && symfile_objfile == NULL) | |
bf469271 PA |
763 | { |
764 | TRY | |
765 | { | |
766 | ops->open_symbol_file_object (from_tty); | |
767 | } | |
768 | CATCH (ex, RETURN_MASK_ALL) | |
769 | { | |
770 | exception_fprintf (gdb_stderr, ex, | |
771 | "Error reading attached " | |
772 | "process's symbol file.\n"); | |
773 | } | |
774 | END_CATCH | |
775 | } | |
181e7f93 | 776 | } |
104c1213 | 777 | |
07cd4b97 JB |
778 | /* GDB and the inferior's dynamic linker each maintain their own |
779 | list of currently loaded shared objects; we want to bring the | |
780 | former in sync with the latter. Scan both lists, seeing which | |
781 | shared objects appear where. There are three cases: | |
782 | ||
783 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
784 | knows about it already, and it's still loaded in the inferior. |
785 | Nothing needs to happen. | |
07cd4b97 JB |
786 | |
787 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
788 | the inferior has unloaded it. We should remove the shared |
789 | object from GDB's tables. | |
07cd4b97 JB |
790 | |
791 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
792 | means that it's just been loaded. We should add it to GDB's |
793 | tables. | |
07cd4b97 JB |
794 | |
795 | So we walk GDB's list, checking each entry to see if it appears | |
796 | in the inferior's list too. If it does, no action is needed, and | |
797 | we remove it from the inferior's list. If it doesn't, the | |
798 | inferior has unloaded it, and we remove it from GDB's list. By | |
799 | the time we're done walking GDB's list, the inferior's list | |
800 | contains only the new shared objects, which we then add. */ | |
801 | ||
802 | gdb = so_list_head; | |
803 | gdb_link = &so_list_head; | |
804 | while (gdb) | |
c906108c | 805 | { |
07cd4b97 JB |
806 | struct so_list *i = inferior; |
807 | struct so_list **i_link = &inferior; | |
808 | ||
809 | /* Check to see whether the shared object *gdb also appears in | |
810 | the inferior's current list. */ | |
811 | while (i) | |
c906108c | 812 | { |
a7c02bc8 VP |
813 | if (ops->same) |
814 | { | |
815 | if (ops->same (gdb, i)) | |
816 | break; | |
817 | } | |
818 | else | |
819 | { | |
0ba1096a | 820 | if (! filename_cmp (gdb->so_original_name, i->so_original_name)) |
a7c02bc8 VP |
821 | break; |
822 | } | |
07cd4b97 JB |
823 | |
824 | i_link = &i->next; | |
825 | i = *i_link; | |
c906108c | 826 | } |
c5aa993b | 827 | |
07cd4b97 JB |
828 | /* If the shared object appears on the inferior's list too, then |
829 | it's still loaded, so we don't need to do anything. Delete | |
830 | it from the inferior's list, and leave it on GDB's list. */ | |
831 | if (i) | |
c906108c | 832 | { |
07cd4b97 | 833 | *i_link = i->next; |
07cd4b97 JB |
834 | free_so (i); |
835 | gdb_link = &gdb->next; | |
836 | gdb = *gdb_link; | |
837 | } | |
838 | ||
839 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
840 | else | |
841 | { | |
42a6e6a0 MK |
842 | /* Notify any observer that the shared object has been |
843 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
844 | observer_notify_solib_unloaded (gdb); |
845 | ||
edcc5120 TT |
846 | VEC_safe_push (char_ptr, current_program_space->deleted_solibs, |
847 | xstrdup (gdb->so_name)); | |
848 | ||
07cd4b97 | 849 | *gdb_link = gdb->next; |
07cd4b97 JB |
850 | |
851 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
59145f8c AR |
852 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED) |
853 | && !solib_used (gdb)) | |
07cd4b97 JB |
854 | free_objfile (gdb->objfile); |
855 | ||
856 | /* Some targets' section tables might be referring to | |
857 | sections from so->abfd; remove them. */ | |
046ac79f | 858 | remove_target_sections (gdb); |
07cd4b97 JB |
859 | |
860 | free_so (gdb); | |
861 | gdb = *gdb_link; | |
c906108c SS |
862 | } |
863 | } | |
c5aa993b | 864 | |
07cd4b97 JB |
865 | /* Now the inferior's list contains only shared objects that don't |
866 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 867 | to GDB's shared object list. */ |
07cd4b97 | 868 | if (inferior) |
c906108c | 869 | { |
048d532d PA |
870 | int not_found = 0; |
871 | const char *not_found_filename = NULL; | |
872 | ||
07cd4b97 JB |
873 | struct so_list *i; |
874 | ||
875 | /* Add the new shared objects to GDB's list. */ | |
876 | *gdb_link = inferior; | |
877 | ||
e8930304 | 878 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 879 | for (i = inferior; i; i = i->next) |
c906108c | 880 | { |
048d532d | 881 | |
6c95b8df | 882 | i->pspace = current_program_space; |
edcc5120 | 883 | VEC_safe_push (so_list_ptr, current_program_space->added_solibs, i); |
07cd4b97 | 884 | |
492d29ea | 885 | TRY |
048d532d PA |
886 | { |
887 | /* Fill in the rest of the `struct so_list' node. */ | |
888 | if (!solib_map_sections (i)) | |
889 | { | |
890 | not_found++; | |
891 | if (not_found_filename == NULL) | |
892 | not_found_filename = i->so_original_name; | |
893 | } | |
894 | } | |
07cd4b97 | 895 | |
492d29ea PA |
896 | CATCH (e, RETURN_MASK_ERROR) |
897 | { | |
898 | exception_fprintf (gdb_stderr, e, | |
899 | _("Error while mapping shared " | |
900 | "library sections:\n")); | |
901 | } | |
902 | END_CATCH | |
42a6e6a0 MK |
903 | |
904 | /* Notify any observer that the shared object has been | |
048d532d | 905 | loaded now that we've added it to GDB's tables. */ |
42a6e6a0 | 906 | observer_notify_solib_loaded (i); |
c906108c | 907 | } |
048d532d PA |
908 | |
909 | /* If a library was not found, issue an appropriate warning | |
910 | message. We have to use a single call to warning in case the | |
911 | front end does something special with warnings, e.g., pop up | |
912 | a dialog box. It Would Be Nice if we could get a "warning: " | |
913 | prefix on each line in the CLI front end, though - it doesn't | |
914 | stand out well. */ | |
915 | ||
916 | if (not_found == 1) | |
3e43a32a MS |
917 | warning (_("Could not load shared library symbols for %s.\n" |
918 | "Do you need \"set solib-search-path\" " | |
919 | "or \"set sysroot\"?"), | |
048d532d PA |
920 | not_found_filename); |
921 | else if (not_found > 1) | |
922 | warning (_("\ | |
923 | Could not load shared library symbols for %d libraries, e.g. %s.\n\ | |
924 | Use the \"info sharedlibrary\" command to see the complete listing.\n\ | |
925 | Do you need \"set solib-search-path\" or \"set sysroot\"?"), | |
926 | not_found, not_found_filename); | |
e8930304 | 927 | } |
105b175f JB |
928 | } |
929 | ||
17a37d48 PP |
930 | |
931 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
932 | |
933 | Uses a fairly simplistic heuristic approach where we check | |
934 | the file name against "/libpthread". This can lead to false | |
935 | positives, but this should be good enough in practice. */ | |
936 | ||
17a37d48 PP |
937 | int |
938 | libpthread_name_p (const char *name) | |
939 | { | |
940 | return (strstr (name, "/libpthread") != NULL); | |
941 | } | |
942 | ||
943 | /* Return non-zero if SO is the libpthread shared library. */ | |
944 | ||
6612ad7f JB |
945 | static int |
946 | libpthread_solib_p (struct so_list *so) | |
947 | { | |
17a37d48 | 948 | return libpthread_name_p (so->so_name); |
6612ad7f | 949 | } |
105b175f | 950 | |
7f86f058 | 951 | /* Read in symbolic information for any shared objects whose names |
105b175f JB |
952 | match PATTERN. (If we've already read a shared object's symbol |
953 | info, leave it alone.) If PATTERN is zero, read them all. | |
954 | ||
990f9fe3 FF |
955 | If READSYMS is 0, defer reading symbolic information until later |
956 | but still do any needed low level processing. | |
957 | ||
e696b3ad | 958 | FROM_TTY is described for update_solib_list, above. */ |
105b175f JB |
959 | |
960 | void | |
e696b3ad | 961 | solib_add (const char *pattern, int from_tty, int readsyms) |
105b175f JB |
962 | { |
963 | struct so_list *gdb; | |
964 | ||
770e7fc7 DE |
965 | if (print_symbol_loading_p (from_tty, 0, 0)) |
966 | { | |
967 | if (pattern != NULL) | |
968 | { | |
969 | printf_unfiltered (_("Loading symbols for shared libraries: %s\n"), | |
970 | pattern); | |
971 | } | |
972 | else | |
973 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
974 | } | |
975 | ||
2eff07b3 PP |
976 | current_program_space->solib_add_generation++; |
977 | ||
105b175f JB |
978 | if (pattern) |
979 | { | |
980 | char *re_err = re_comp (pattern); | |
981 | ||
982 | if (re_err) | |
8a3fe4f8 | 983 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
984 | } |
985 | ||
e696b3ad | 986 | update_solib_list (from_tty); |
c906108c | 987 | |
105b175f JB |
988 | /* Walk the list of currently loaded shared libraries, and read |
989 | symbols for any that match the pattern --- or any whose symbols | |
990 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
991 | { |
992 | int any_matches = 0; | |
993 | int loaded_any_symbols = 0; | |
b15cc25c PA |
994 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
995 | ||
996 | if (from_tty) | |
997 | add_flags |= SYMFILE_VERBOSE; | |
c906108c | 998 | |
e8930304 JB |
999 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
1000 | if (! pattern || re_exec (gdb->so_name)) | |
1001 | { | |
6612ad7f JB |
1002 | /* Normally, we would read the symbols from that library |
1003 | only if READSYMS is set. However, we're making a small | |
1004 | exception for the pthread library, because we sometimes | |
1005 | need the library symbols to be loaded in order to provide | |
1006 | thread support (x86-linux for instance). */ | |
1007 | const int add_this_solib = | |
1008 | (readsyms || libpthread_solib_p (gdb)); | |
1009 | ||
e8930304 | 1010 | any_matches = 1; |
a86988f2 PA |
1011 | if (add_this_solib) |
1012 | { | |
1013 | if (gdb->symbols_loaded) | |
1014 | { | |
1015 | /* If no pattern was given, be quiet for shared | |
1016 | libraries we have already loaded. */ | |
1017 | if (pattern && (from_tty || info_verbose)) | |
1018 | printf_unfiltered (_("Symbols already loaded for %s\n"), | |
1019 | gdb->so_name); | |
1020 | } | |
b15cc25c | 1021 | else if (solib_read_symbols (gdb, add_flags)) |
a86988f2 PA |
1022 | loaded_any_symbols = 1; |
1023 | } | |
e8930304 JB |
1024 | } |
1025 | ||
7eedccfa PP |
1026 | if (loaded_any_symbols) |
1027 | breakpoint_re_set (); | |
1028 | ||
e8930304 JB |
1029 | if (from_tty && pattern && ! any_matches) |
1030 | printf_unfiltered | |
1031 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
1032 | ||
1033 | if (loaded_any_symbols) | |
1034 | { | |
1035 | /* Getting new symbols may change our opinion about what is | |
1036 | frameless. */ | |
1037 | reinit_frame_cache (); | |
e8930304 JB |
1038 | } |
1039 | } | |
c906108c SS |
1040 | } |
1041 | ||
7f86f058 PA |
1042 | /* Implement the "info sharedlibrary" command. Walk through the |
1043 | shared library list and print information about each attached | |
1044 | library matching PATTERN. If PATTERN is elided, print them | |
1045 | all. */ | |
c906108c SS |
1046 | |
1047 | static void | |
55333a84 | 1048 | info_sharedlibrary_command (char *pattern, int from_tty) |
c906108c | 1049 | { |
52f0bd74 | 1050 | struct so_list *so = NULL; /* link map state variable */ |
55333a84 | 1051 | int so_missing_debug_info = 0; |
c906108c | 1052 | int addr_width; |
55333a84 | 1053 | int nr_libs; |
f5656ead | 1054 | struct gdbarch *gdbarch = target_gdbarch (); |
79a45e25 | 1055 | struct ui_out *uiout = current_uiout; |
55333a84 DE |
1056 | |
1057 | if (pattern) | |
1058 | { | |
1059 | char *re_err = re_comp (pattern); | |
1060 | ||
1061 | if (re_err) | |
1062 | error (_("Invalid regexp: %s"), re_err); | |
1063 | } | |
c906108c | 1064 | |
84eb3c4f | 1065 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
55333a84 | 1066 | addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4); |
c906108c | 1067 | |
e696b3ad | 1068 | update_solib_list (from_tty); |
07cd4b97 | 1069 | |
4a2b031d TT |
1070 | /* ui_out_emit_table table_emitter needs to know the number of rows, |
1071 | so we need to make two passes over the libs. */ | |
55333a84 DE |
1072 | |
1073 | for (nr_libs = 0, so = so_list_head; so; so = so->next) | |
c906108c | 1074 | { |
c5aa993b | 1075 | if (so->so_name[0]) |
c906108c | 1076 | { |
55333a84 DE |
1077 | if (pattern && ! re_exec (so->so_name)) |
1078 | continue; | |
1079 | ++nr_libs; | |
1080 | } | |
1081 | } | |
1082 | ||
4a2b031d TT |
1083 | { |
1084 | ui_out_emit_table table_emitter (uiout, 4, nr_libs, "SharedLibraryTable"); | |
55333a84 | 1085 | |
4a2b031d TT |
1086 | /* The "- 1" is because ui_out adds one space between columns. */ |
1087 | uiout->table_header (addr_width - 1, ui_left, "from", "From"); | |
1088 | uiout->table_header (addr_width - 1, ui_left, "to", "To"); | |
1089 | uiout->table_header (12 - 1, ui_left, "syms-read", "Syms Read"); | |
1090 | uiout->table_header (0, ui_noalign, "name", "Shared Object Library"); | |
55333a84 | 1091 | |
4a2b031d | 1092 | uiout->table_body (); |
55333a84 | 1093 | |
4a2b031d TT |
1094 | ALL_SO_LIBS (so) |
1095 | { | |
1096 | if (! so->so_name[0]) | |
1097 | continue; | |
1098 | if (pattern && ! re_exec (so->so_name)) | |
1099 | continue; | |
1100 | ||
1101 | ui_out_emit_tuple tuple_emitter (uiout, "lib"); | |
1102 | ||
1103 | if (so->addr_high != 0) | |
1104 | { | |
1105 | uiout->field_core_addr ("from", gdbarch, so->addr_low); | |
1106 | uiout->field_core_addr ("to", gdbarch, so->addr_high); | |
1107 | } | |
1108 | else | |
1109 | { | |
1110 | uiout->field_skip ("from"); | |
1111 | uiout->field_skip ("to"); | |
1112 | } | |
1113 | ||
1114 | if (! interp_ui_out (top_level_interpreter ())->is_mi_like_p () | |
1115 | && so->symbols_loaded | |
1116 | && !objfile_has_symbols (so->objfile)) | |
1117 | { | |
1118 | so_missing_debug_info = 1; | |
1119 | uiout->field_string ("syms-read", "Yes (*)"); | |
1120 | } | |
1121 | else | |
1122 | uiout->field_string ("syms-read", so->symbols_loaded ? "Yes" : "No"); | |
1123 | ||
1124 | uiout->field_string ("name", so->so_name); | |
1125 | ||
1126 | uiout->text ("\n"); | |
1127 | } | |
1128 | } | |
55333a84 DE |
1129 | |
1130 | if (nr_libs == 0) | |
1131 | { | |
1132 | if (pattern) | |
112e8700 | 1133 | uiout->message (_("No shared libraries matched.\n")); |
55333a84 | 1134 | else |
112e8700 | 1135 | uiout->message (_("No shared libraries loaded at this time.\n")); |
55333a84 DE |
1136 | } |
1137 | else | |
c906108c | 1138 | { |
55333a84 | 1139 | if (so_missing_debug_info) |
112e8700 | 1140 | uiout->message (_("(*): Shared library is missing " |
3e43a32a | 1141 | "debugging information.\n")); |
c906108c SS |
1142 | } |
1143 | } | |
1144 | ||
5fd1a349 PP |
1145 | /* Return 1 if ADDRESS lies within SOLIB. */ |
1146 | ||
1147 | int | |
1148 | solib_contains_address_p (const struct so_list *const solib, | |
1149 | CORE_ADDR address) | |
1150 | { | |
0542c86d | 1151 | struct target_section *p; |
5fd1a349 PP |
1152 | |
1153 | for (p = solib->sections; p < solib->sections_end; p++) | |
1154 | if (p->addr <= address && address < p->endaddr) | |
1155 | return 1; | |
1156 | ||
1157 | return 0; | |
1158 | } | |
1159 | ||
7f86f058 PA |
1160 | /* If ADDRESS is in a shared lib in program space PSPACE, return its |
1161 | name. | |
c906108c | 1162 | |
7f86f058 PA |
1163 | Provides a hook for other gdb routines to discover whether or not a |
1164 | particular address is within the mapped address space of a shared | |
1165 | library. | |
c906108c | 1166 | |
c5aa993b JM |
1167 | For example, this routine is called at one point to disable |
1168 | breakpoints which are in shared libraries that are not currently | |
7f86f058 | 1169 | mapped in. */ |
c906108c SS |
1170 | |
1171 | char * | |
6c95b8df | 1172 | solib_name_from_address (struct program_space *pspace, CORE_ADDR address) |
c906108c | 1173 | { |
6c95b8df | 1174 | struct so_list *so = NULL; |
c5aa993b | 1175 | |
6c95b8df | 1176 | for (so = pspace->so_list; so; so = so->next) |
5fd1a349 PP |
1177 | if (solib_contains_address_p (so, address)) |
1178 | return (so->so_name); | |
07cd4b97 | 1179 | |
c906108c SS |
1180 | return (0); |
1181 | } | |
1182 | ||
de18c1d8 JM |
1183 | /* Return whether the data starting at VADDR, size SIZE, must be kept |
1184 | in a core file for shared libraries loaded before "gcore" is used | |
1185 | to be handled correctly when the core file is loaded. This only | |
1186 | applies when the section would otherwise not be kept in the core | |
1187 | file (in particular, for readonly sections). */ | |
1188 | ||
1189 | int | |
1190 | solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size) | |
1191 | { | |
3641da11 | 1192 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
de18c1d8 JM |
1193 | |
1194 | if (ops->keep_data_in_core) | |
1195 | return ops->keep_data_in_core (vaddr, size); | |
1196 | else | |
1197 | return 0; | |
1198 | } | |
1199 | ||
c906108c SS |
1200 | /* Called by free_all_symtabs */ |
1201 | ||
c5aa993b | 1202 | void |
fba45db2 | 1203 | clear_solib (void) |
c906108c | 1204 | { |
3641da11 | 1205 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
66aba65d | 1206 | |
1736a7bd | 1207 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 1208 | |
c906108c SS |
1209 | while (so_list_head) |
1210 | { | |
07cd4b97 | 1211 | struct so_list *so = so_list_head; |
433759f7 | 1212 | |
07cd4b97 | 1213 | so_list_head = so->next; |
c86cf029 | 1214 | observer_notify_solib_unloaded (so); |
046ac79f | 1215 | remove_target_sections (so); |
07cd4b97 | 1216 | free_so (so); |
c906108c | 1217 | } |
07cd4b97 | 1218 | |
66aba65d | 1219 | ops->clear_solib (); |
c906108c SS |
1220 | } |
1221 | ||
7f86f058 PA |
1222 | /* Shared library startup support. When GDB starts up the inferior, |
1223 | it nurses it along (through the shell) until it is ready to execute | |
1224 | its first instruction. At this point, this function gets | |
1225 | called. */ | |
c5aa993b JM |
1226 | |
1227 | void | |
268a4a75 | 1228 | solib_create_inferior_hook (int from_tty) |
c906108c | 1229 | { |
3641da11 | 1230 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1231 | |
268a4a75 | 1232 | ops->solib_create_inferior_hook (from_tty); |
c906108c SS |
1233 | } |
1234 | ||
7f86f058 PA |
1235 | /* Check to see if an address is in the dynamic loader's dynamic |
1236 | symbol resolution code. Return 1 if so, 0 otherwise. */ | |
d7fa2ae2 KB |
1237 | |
1238 | int | |
1239 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
1240 | { | |
3641da11 | 1241 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
433759f7 | 1242 | |
66aba65d | 1243 | return ops->in_dynsym_resolve_code (pc); |
d7fa2ae2 | 1244 | } |
c906108c | 1245 | |
7f86f058 | 1246 | /* Implements the "sharedlibrary" command. */ |
c906108c SS |
1247 | |
1248 | static void | |
fba45db2 | 1249 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
1250 | { |
1251 | dont_repeat (); | |
e696b3ad | 1252 | solib_add (args, from_tty, 1); |
c906108c SS |
1253 | } |
1254 | ||
7f86f058 | 1255 | /* Implements the command "nosharedlibrary", which discards symbols |
cb0ba49e MS |
1256 | that have been auto-loaded from shared libraries. Symbols from |
1257 | shared libraries that were added by explicit request of the user | |
1258 | are not discarded. Also called from remote.c. */ | |
1259 | ||
c60a7562 MS |
1260 | void |
1261 | no_shared_libraries (char *ignored, int from_tty) | |
1262 | { | |
a3247a22 PP |
1263 | /* The order of the two routines below is important: clear_solib notifies |
1264 | the solib_unloaded observers, and some of these observers might need | |
1265 | access to their associated objfiles. Therefore, we can not purge the | |
1266 | solibs' objfiles before clear_solib has been called. */ | |
1267 | ||
615b9dba | 1268 | clear_solib (); |
a3247a22 | 1269 | objfile_purge_solibs (); |
c60a7562 | 1270 | } |
c906108c | 1271 | |
f9e14852 GB |
1272 | /* See solib.h. */ |
1273 | ||
1274 | void | |
1275 | update_solib_breakpoints (void) | |
1276 | { | |
1277 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1278 | ||
1279 | if (ops->update_breakpoints != NULL) | |
1280 | ops->update_breakpoints (); | |
1281 | } | |
1282 | ||
1283 | /* See solib.h. */ | |
1284 | ||
1285 | void | |
1286 | handle_solib_event (void) | |
1287 | { | |
1288 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); | |
1289 | ||
1290 | if (ops->handle_event != NULL) | |
1291 | ops->handle_event (); | |
1292 | ||
1293 | clear_program_space_solib_cache (current_inferior ()->pspace); | |
1294 | ||
1295 | /* Check for any newly added shared libraries if we're supposed to | |
1296 | be adding them automatically. Switch terminal for any messages | |
1297 | produced by breakpoint_re_set. */ | |
223ffa71 | 1298 | target_terminal::ours_for_output (); |
e696b3ad | 1299 | solib_add (NULL, 0, auto_solib_add); |
223ffa71 | 1300 | target_terminal::inferior (); |
f9e14852 GB |
1301 | } |
1302 | ||
a86988f2 PA |
1303 | /* Reload shared libraries, but avoid reloading the same symbol file |
1304 | we already have loaded. */ | |
1305 | ||
1306 | static void | |
1307 | reload_shared_libraries_1 (int from_tty) | |
1308 | { | |
1309 | struct so_list *so; | |
a86988f2 | 1310 | |
770e7fc7 DE |
1311 | if (print_symbol_loading_p (from_tty, 0, 0)) |
1312 | printf_unfiltered (_("Loading symbols for shared libraries.\n")); | |
1313 | ||
a86988f2 PA |
1314 | for (so = so_list_head; so != NULL; so = so->next) |
1315 | { | |
ee0c3293 | 1316 | char *found_pathname = NULL; |
a86988f2 | 1317 | int was_loaded = so->symbols_loaded; |
b15cc25c PA |
1318 | symfile_add_flags add_flags = SYMFILE_DEFER_BP_RESET; |
1319 | ||
1320 | if (from_tty) | |
1321 | add_flags |= SYMFILE_VERBOSE; | |
a86988f2 | 1322 | |
ee0c3293 TT |
1323 | gdb::unique_xmalloc_ptr<char> filename |
1324 | (tilde_expand (so->so_original_name)); | |
1325 | gdb_bfd_ref_ptr abfd (solib_bfd_open (filename.get ())); | |
a86988f2 | 1326 | if (abfd != NULL) |
ee0c3293 | 1327 | found_pathname = bfd_get_filename (abfd.get ()); |
a86988f2 PA |
1328 | |
1329 | /* If this shared library is no longer associated with its previous | |
1330 | symbol file, close that. */ | |
1331 | if ((found_pathname == NULL && was_loaded) | |
1332 | || (found_pathname != NULL | |
0ba1096a | 1333 | && filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1334 | { |
59145f8c AR |
1335 | if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED) |
1336 | && !solib_used (so)) | |
a86988f2 | 1337 | free_objfile (so->objfile); |
046ac79f | 1338 | remove_target_sections (so); |
0892cb63 | 1339 | clear_so (so); |
a86988f2 PA |
1340 | } |
1341 | ||
1342 | /* If this shared library is now associated with a new symbol | |
1343 | file, open it. */ | |
1344 | if (found_pathname != NULL | |
1345 | && (!was_loaded | |
0ba1096a | 1346 | || filename_cmp (found_pathname, so->so_name) != 0)) |
a86988f2 | 1347 | { |
492d29ea | 1348 | int got_error = 0; |
a86988f2 | 1349 | |
492d29ea PA |
1350 | TRY |
1351 | { | |
1352 | solib_map_sections (so); | |
1353 | } | |
1354 | ||
1355 | CATCH (e, RETURN_MASK_ERROR) | |
1356 | { | |
1357 | exception_fprintf (gdb_stderr, e, | |
1358 | _("Error while mapping " | |
1359 | "shared library sections:\n")); | |
1360 | got_error = 1; | |
1361 | } | |
1362 | END_CATCH | |
a86988f2 | 1363 | |
492d29ea PA |
1364 | if (!got_error |
1365 | && (auto_solib_add || was_loaded || libpthread_solib_p (so))) | |
b15cc25c | 1366 | solib_read_symbols (so, add_flags); |
a86988f2 PA |
1367 | } |
1368 | } | |
a86988f2 PA |
1369 | } |
1370 | ||
cf466558 | 1371 | static void |
f397e303 AC |
1372 | reload_shared_libraries (char *ignored, int from_tty, |
1373 | struct cmd_list_element *e) | |
cf466558 | 1374 | { |
3641da11 | 1375 | const struct target_so_ops *ops; |
a86988f2 PA |
1376 | |
1377 | reload_shared_libraries_1 (from_tty); | |
1378 | ||
f5656ead | 1379 | ops = solib_ops (target_gdbarch ()); |
a86988f2 | 1380 | |
c378eb4e | 1381 | /* Creating inferior hooks here has two purposes. First, if we reload |
c8fa6cdd VP |
1382 | shared libraries then the address of solib breakpoint we've computed |
1383 | previously might be no longer valid. For example, if we forgot to set | |
1384 | solib-absolute-prefix and are setting it right now, then the previous | |
1385 | breakpoint address is plain wrong. Second, installing solib hooks | |
1386 | also implicitly figures were ld.so is and loads symbols for it. | |
1387 | Absent this call, if we've just connected to a target and set | |
1388 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1389 | about ld.so. */ | |
1390 | if (target_has_execution) | |
1391 | { | |
a86988f2 PA |
1392 | /* Reset or free private data structures not associated with |
1393 | so_list entries. */ | |
1394 | ops->clear_solib (); | |
1395 | ||
1396 | /* Remove any previous solib event breakpoint. This is usually | |
1397 | done in common code, at breakpoint_init_inferior time, but | |
1398 | we're not really starting up the inferior here. */ | |
1399 | remove_solib_event_breakpoints (); | |
1400 | ||
268a4a75 | 1401 | solib_create_inferior_hook (from_tty); |
c8fa6cdd | 1402 | } |
268a4a75 JK |
1403 | |
1404 | /* Sometimes the platform-specific hook loads initial shared | |
1405 | libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be | |
1406 | incorrectly 0 but such solib targets should be fixed anyway. If we | |
1407 | made all the inferior hook methods consistent, this call could be | |
1408 | removed. Call it only after the solib target has been initialized by | |
1409 | solib_create_inferior_hook. */ | |
1410 | ||
e696b3ad | 1411 | solib_add (NULL, 0, auto_solib_add); |
268a4a75 | 1412 | |
a86988f2 PA |
1413 | breakpoint_re_set (); |
1414 | ||
1415 | /* We may have loaded or unloaded debug info for some (or all) | |
1416 | shared libraries. However, frames may still reference them. For | |
1417 | example, a frame's unwinder might still point at DWARF FDE | |
1418 | structures that are now freed. Also, getting new symbols may | |
1419 | change our opinion about what is frameless. */ | |
c8fa6cdd | 1420 | reinit_frame_cache (); |
cf466558 KB |
1421 | } |
1422 | ||
2938e6cf GB |
1423 | /* Wrapper for reload_shared_libraries that replaces "remote:" |
1424 | at the start of gdb_sysroot with "target:". */ | |
1425 | ||
1426 | static void | |
1427 | gdb_sysroot_changed (char *ignored, int from_tty, | |
1428 | struct cmd_list_element *e) | |
1429 | { | |
1430 | const char *old_prefix = "remote:"; | |
1431 | const char *new_prefix = TARGET_SYSROOT_PREFIX; | |
1432 | ||
1433 | if (startswith (gdb_sysroot, old_prefix)) | |
1434 | { | |
1435 | static int warning_issued = 0; | |
1436 | ||
1437 | gdb_assert (strlen (old_prefix) == strlen (new_prefix)); | |
1438 | memcpy (gdb_sysroot, new_prefix, strlen (new_prefix)); | |
1439 | ||
1440 | if (!warning_issued) | |
1441 | { | |
1442 | warning (_("\"%s\" is deprecated, use \"%s\" instead."), | |
1443 | old_prefix, new_prefix); | |
1444 | warning (_("sysroot set to \"%s\"."), gdb_sysroot); | |
1445 | ||
1446 | warning_issued = 1; | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | reload_shared_libraries (ignored, from_tty, e); | |
1451 | } | |
1452 | ||
920d2a44 AC |
1453 | static void |
1454 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1455 | struct cmd_list_element *c, const char *value) | |
1456 | { | |
1457 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
1458 | value); | |
1459 | } | |
1460 | ||
1461 | ||
3a40aaa0 UW |
1462 | /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call |
1463 | the library-specific handler if it is installed for the current target. */ | |
1464 | ||
d12307c1 | 1465 | struct block_symbol |
efad9b6a | 1466 | solib_global_lookup (struct objfile *objfile, |
3a40aaa0 | 1467 | const char *name, |
21b556f4 | 1468 | const domain_enum domain) |
3a40aaa0 | 1469 | { |
6f059256 | 1470 | const struct target_so_ops *ops = solib_ops (target_gdbarch ()); |
3a40aaa0 | 1471 | |
e8a92f7b | 1472 | if (ops->lookup_lib_global_symbol != NULL) |
94af9270 | 1473 | return ops->lookup_lib_global_symbol (objfile, name, domain); |
d12307c1 | 1474 | return (struct block_symbol) {NULL, NULL}; |
3a40aaa0 UW |
1475 | } |
1476 | ||
cb457ae2 YQ |
1477 | /* Lookup the value for a specific symbol from dynamic symbol table. Look |
1478 | up symbol from ABFD. MATCH_SYM is a callback function to determine | |
1479 | whether to pick up a symbol. DATA is the input of this callback | |
1480 | function. Return NULL if symbol is not found. */ | |
1481 | ||
1482 | CORE_ADDR | |
1483 | gdb_bfd_lookup_symbol_from_symtab (bfd *abfd, | |
3953f15c SM |
1484 | int (*match_sym) (const asymbol *, |
1485 | const void *), | |
1486 | const void *data) | |
cb457ae2 YQ |
1487 | { |
1488 | long storage_needed = bfd_get_symtab_upper_bound (abfd); | |
1489 | CORE_ADDR symaddr = 0; | |
1490 | ||
1491 | if (storage_needed > 0) | |
1492 | { | |
1493 | unsigned int i; | |
1494 | ||
1495 | asymbol **symbol_table = (asymbol **) xmalloc (storage_needed); | |
1496 | struct cleanup *back_to = make_cleanup (xfree, symbol_table); | |
1497 | unsigned int number_of_symbols = | |
1498 | bfd_canonicalize_symtab (abfd, symbol_table); | |
1499 | ||
1500 | for (i = 0; i < number_of_symbols; i++) | |
1501 | { | |
1502 | asymbol *sym = *symbol_table++; | |
1503 | ||
1504 | if (match_sym (sym, data)) | |
1505 | { | |
3e29f34a MR |
1506 | struct gdbarch *gdbarch = target_gdbarch (); |
1507 | symaddr = sym->value; | |
1508 | ||
1509 | /* Some ELF targets fiddle with addresses of symbols they | |
1510 | consider special. They use minimal symbols to do that | |
1511 | and this is needed for correct breakpoint placement, | |
1512 | but we do not have full data here to build a complete | |
1513 | minimal symbol, so just set the address and let the | |
1514 | targets cope with that. */ | |
1515 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
1516 | && gdbarch_elf_make_msymbol_special_p (gdbarch)) | |
1517 | { | |
1518 | struct minimal_symbol msym; | |
1519 | ||
1520 | memset (&msym, 0, sizeof (msym)); | |
1521 | SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr); | |
1522 | gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym); | |
1523 | symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym); | |
1524 | } | |
1525 | ||
cb457ae2 | 1526 | /* BFD symbols are section relative. */ |
3e29f34a | 1527 | symaddr += sym->section->vma; |
cb457ae2 YQ |
1528 | break; |
1529 | } | |
1530 | } | |
1531 | do_cleanups (back_to); | |
1532 | } | |
1533 | ||
1534 | return symaddr; | |
1535 | } | |
1536 | ||
1537 | /* Lookup the value for a specific symbol from symbol table. Look up symbol | |
1538 | from ABFD. MATCH_SYM is a callback function to determine whether to pick | |
1539 | up a symbol. DATA is the input of this callback function. Return NULL | |
1540 | if symbol is not found. */ | |
1541 | ||
1542 | static CORE_ADDR | |
1543 | bfd_lookup_symbol_from_dyn_symtab (bfd *abfd, | |
3953f15c SM |
1544 | int (*match_sym) (const asymbol *, |
1545 | const void *), | |
1546 | const void *data) | |
cb457ae2 YQ |
1547 | { |
1548 | long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd); | |
1549 | CORE_ADDR symaddr = 0; | |
1550 | ||
1551 | if (storage_needed > 0) | |
1552 | { | |
1553 | unsigned int i; | |
1554 | asymbol **symbol_table = (asymbol **) xmalloc (storage_needed); | |
1555 | struct cleanup *back_to = make_cleanup (xfree, symbol_table); | |
1556 | unsigned int number_of_symbols = | |
1557 | bfd_canonicalize_dynamic_symtab (abfd, symbol_table); | |
1558 | ||
1559 | for (i = 0; i < number_of_symbols; i++) | |
1560 | { | |
1561 | asymbol *sym = *symbol_table++; | |
1562 | ||
1563 | if (match_sym (sym, data)) | |
1564 | { | |
1565 | /* BFD symbols are section relative. */ | |
1566 | symaddr = sym->value + sym->section->vma; | |
1567 | break; | |
1568 | } | |
1569 | } | |
1570 | do_cleanups (back_to); | |
1571 | } | |
1572 | return symaddr; | |
1573 | } | |
1574 | ||
1575 | /* Lookup the value for a specific symbol from symbol table and dynamic | |
1576 | symbol table. Look up symbol from ABFD. MATCH_SYM is a callback | |
1577 | function to determine whether to pick up a symbol. DATA is the | |
1578 | input of this callback function. Return NULL if symbol is not | |
1579 | found. */ | |
1580 | ||
1581 | CORE_ADDR | |
1582 | gdb_bfd_lookup_symbol (bfd *abfd, | |
3953f15c SM |
1583 | int (*match_sym) (const asymbol *, const void *), |
1584 | const void *data) | |
cb457ae2 YQ |
1585 | { |
1586 | CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data); | |
1587 | ||
1588 | /* On FreeBSD, the dynamic linker is stripped by default. So we'll | |
1589 | have to check the dynamic string table too. */ | |
1590 | if (symaddr == 0) | |
1591 | symaddr = bfd_lookup_symbol_from_dyn_symtab (abfd, match_sym, data); | |
1592 | ||
1593 | return symaddr; | |
1594 | } | |
3a40aaa0 | 1595 | |
63644780 NB |
1596 | /* SO_LIST_HEAD may contain user-loaded object files that can be removed |
1597 | out-of-band by the user. So upon notification of free_objfile remove | |
1598 | all references to any user-loaded file that is about to be freed. */ | |
1599 | ||
1600 | static void | |
1601 | remove_user_added_objfile (struct objfile *objfile) | |
1602 | { | |
1603 | struct so_list *so; | |
1604 | ||
1605 | if (objfile != 0 && objfile->flags & OBJF_USERLOADED) | |
1606 | { | |
1607 | for (so = so_list_head; so != NULL; so = so->next) | |
1608 | if (so->objfile == objfile) | |
1609 | so->objfile = NULL; | |
1610 | } | |
1611 | } | |
1612 | ||
c906108c | 1613 | void |
fba45db2 | 1614 | _initialize_solib (void) |
c906108c | 1615 | { |
66aba65d MK |
1616 | solib_data = gdbarch_data_register_pre_init (solib_init); |
1617 | ||
63644780 NB |
1618 | observer_attach_free_objfile (remove_user_added_objfile); |
1619 | ||
c906108c | 1620 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1621 | _("Load shared object library symbols for files matching REGEXP.")); |
c5aa993b | 1622 | add_info ("sharedlibrary", info_sharedlibrary_command, |
1bedd215 | 1623 | _("Status of loaded shared object libraries.")); |
b30a0bc3 | 1624 | add_info_alias ("dll", "sharedlibrary", 1); |
c60a7562 | 1625 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1626 | _("Unload all shared object library symbols.")); |
c906108c | 1627 | |
5bf193a2 AC |
1628 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1629 | &auto_solib_add, _("\ | |
1630 | Set autoloading of shared library symbols."), _("\ | |
1631 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1632 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1633 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1634 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
3e43a32a MS |
1635 | inferior. Otherwise, symbols must be loaded manually, using \ |
1636 | `sharedlibrary'."), | |
5bf193a2 | 1637 | NULL, |
920d2a44 | 1638 | show_auto_solib_add, |
5bf193a2 | 1639 | &setlist, &showlist); |
c906108c | 1640 | |
811a659a GB |
1641 | add_setshow_optional_filename_cmd ("sysroot", class_support, |
1642 | &gdb_sysroot, _("\ | |
f822c95b DJ |
1643 | Set an alternate system root."), _("\ |
1644 | Show the current system root."), _("\ | |
1645 | The system root is used to load absolute shared library symbol files.\n\ | |
1646 | For other (relative) files, you can add directories using\n\ | |
1647 | `set solib-search-path'."), | |
2938e6cf | 1648 | gdb_sysroot_changed, |
811a659a GB |
1649 | NULL, |
1650 | &setlist, &showlist); | |
c906108c | 1651 | |
f822c95b DJ |
1652 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, |
1653 | &setlist); | |
1654 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, | |
1655 | &showlist); | |
030292b7 | 1656 | |
525226b5 AC |
1657 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1658 | &solib_search_path, _("\ | |
3e43a32a MS |
1659 | Set the search path for loading non-absolute shared library symbol files."), |
1660 | _("\ | |
1661 | Show the search path for loading non-absolute shared library symbol files."), | |
1662 | _("\ | |
1663 | This takes precedence over the environment variables \ | |
1664 | PATH and LD_LIBRARY_PATH."), | |
525226b5 | 1665 | reload_shared_libraries, |
920d2a44 | 1666 | show_solib_search_path, |
525226b5 | 1667 | &setlist, &showlist); |
c906108c | 1668 | } |