Commit | Line | Data |
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13437d4b | 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
14a5e767 | 2 | |
6aba47ca | 3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
0fb0cc75 | 4 | 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009 |
9b254dd1 | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 21 | |
c906108c SS |
22 | #include "defs.h" |
23 | ||
c906108c | 24 | #include <sys/types.h> |
c906108c | 25 | #include <fcntl.h> |
13437d4b | 26 | #include "gdb_string.h" |
c906108c SS |
27 | #include "symtab.h" |
28 | #include "bfd.h" | |
29 | #include "symfile.h" | |
30 | #include "objfiles.h" | |
60250e8b | 31 | #include "exceptions.h" |
c906108c SS |
32 | #include "gdbcore.h" |
33 | #include "command.h" | |
34 | #include "target.h" | |
35 | #include "frame.h" | |
88987551 | 36 | #include "gdb_regex.h" |
c906108c SS |
37 | #include "inferior.h" |
38 | #include "environ.h" | |
39 | #include "language.h" | |
40 | #include "gdbcmd.h" | |
fa58ee11 | 41 | #include "completer.h" |
fe4e3eb8 | 42 | #include "filenames.h" /* for DOSish file names */ |
4646aa9d | 43 | #include "exec.h" |
13437d4b | 44 | #include "solist.h" |
84acb35a | 45 | #include "observer.h" |
dbda9972 | 46 | #include "readline/readline.h" |
f1838a98 | 47 | #include "remote.h" |
2c0b251b | 48 | #include "solib.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 | ||
65 | static struct target_so_ops * | |
66 | solib_ops (struct gdbarch *gdbarch) | |
67 | { | |
68 | struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data); | |
69 | return *ops; | |
70 | } | |
7d522c90 DJ |
71 | |
72 | /* Set the solib operations for GDBARCH to NEW_OPS. */ | |
73 | ||
74 | void | |
75 | set_solib_ops (struct gdbarch *gdbarch, struct target_so_ops *new_ops) | |
76 | { | |
77 | struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data); | |
78 | *ops = new_ops; | |
79 | } | |
66aba65d MK |
80 | \f |
81 | ||
13437d4b | 82 | /* external data declarations */ |
c906108c | 83 | |
7d522c90 DJ |
84 | /* FIXME: gdbarch needs to control this variable, or else every |
85 | configuration needs to call set_solib_ops. */ | |
13437d4b | 86 | struct target_so_ops *current_target_so_ops; |
23e04971 MS |
87 | |
88 | /* local data declarations */ | |
07cd4b97 | 89 | |
c906108c | 90 | static struct so_list *so_list_head; /* List of known shared objects */ |
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 | { | |
102 | fprintf_filtered (file, _("\ | |
103 | The search path for loading non-absolute shared library symbol files is %s.\n"), | |
104 | value); | |
105 | } | |
c906108c | 106 | |
e4f7b8c8 MS |
107 | /* |
108 | ||
109 | GLOBAL FUNCTION | |
110 | ||
572d275c | 111 | solib_find -- Find a shared library file. |
e4f7b8c8 MS |
112 | |
113 | SYNOPSIS | |
114 | ||
572d275c | 115 | char *solib_find (char *in_pathname, int *fd); |
e4f7b8c8 MS |
116 | |
117 | DESCRIPTION | |
118 | ||
f822c95b | 119 | Global variable GDB_SYSROOT is used as a prefix directory |
e4f7b8c8 MS |
120 | to search for shared libraries if they have an absolute path. |
121 | ||
122 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
123 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
f822c95b | 124 | shared libraries if not found in GDB_SYSROOT. |
e4f7b8c8 | 125 | |
c8c18e65 | 126 | Search algorithm: |
f822c95b DJ |
127 | * If there is a gdb_sysroot and path is absolute: |
128 | * Search for gdb_sysroot/path. | |
c8c18e65 KW |
129 | * else |
130 | * Look for it literally (unmodified). | |
e4f7b8c8 | 131 | * Look in SOLIB_SEARCH_PATH. |
f43caff8 | 132 | * If available, use target defined search function. |
f822c95b | 133 | * If gdb_sysroot is NOT set, perform the following two searches: |
c8c18e65 KW |
134 | * Look in inferior's $PATH. |
135 | * Look in inferior's $LD_LIBRARY_PATH. | |
136 | * | |
137 | * The last check avoids doing this search when targetting remote | |
f822c95b | 138 | * machines since gdb_sysroot will almost always be set. |
e4f7b8c8 MS |
139 | |
140 | RETURNS | |
b21f0843 | 141 | |
572d275c UW |
142 | Full pathname of the shared library file, or NULL if not found. |
143 | (The pathname is malloc'ed; it needs to be freed by the caller.) | |
144 | *FD is set to either -1 or an open file handle for the library. */ | |
e4f7b8c8 | 145 | |
572d275c UW |
146 | char * |
147 | solib_find (char *in_pathname, int *fd) | |
e4f7b8c8 | 148 | { |
1cf3db46 | 149 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
e4f7b8c8 MS |
150 | int found_file = -1; |
151 | char *temp_pathname = NULL; | |
f822c95b | 152 | int gdb_sysroot_is_empty; |
58dc52c3 | 153 | |
f822c95b | 154 | gdb_sysroot_is_empty = (gdb_sysroot == NULL || *gdb_sysroot == 0); |
e4f7b8c8 | 155 | |
f822c95b | 156 | if (! IS_ABSOLUTE_PATH (in_pathname) || gdb_sysroot_is_empty) |
f1d10cfb AS |
157 | temp_pathname = in_pathname; |
158 | else | |
e4f7b8c8 | 159 | { |
f822c95b | 160 | int prefix_len = strlen (gdb_sysroot); |
f1d10cfb AS |
161 | |
162 | /* Remove trailing slashes from absolute prefix. */ | |
163 | while (prefix_len > 0 | |
f822c95b | 164 | && IS_DIR_SEPARATOR (gdb_sysroot[prefix_len - 1])) |
f1d10cfb AS |
165 | prefix_len--; |
166 | ||
167 | /* Cat the prefixed pathname together. */ | |
168 | temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1); | |
f822c95b | 169 | strncpy (temp_pathname, gdb_sysroot, prefix_len); |
f1d10cfb AS |
170 | temp_pathname[prefix_len] = '\0'; |
171 | strcat (temp_pathname, in_pathname); | |
e4f7b8c8 MS |
172 | } |
173 | ||
f1838a98 UW |
174 | /* Handle remote files. */ |
175 | if (remote_filename_p (temp_pathname)) | |
176 | { | |
572d275c UW |
177 | *fd = -1; |
178 | return xstrdup (temp_pathname); | |
f1838a98 UW |
179 | } |
180 | ||
f1d10cfb AS |
181 | /* Now see if we can open it. */ |
182 | found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0); | |
183 | ||
0997b535 MS |
184 | /* We try to find the library in various ways. After each attempt |
185 | (except for the one above), either found_file >= 0 and | |
186 | temp_pathname is a malloc'd string, or found_file < 0 and | |
187 | temp_pathname does not point to storage that needs to be | |
188 | freed. */ | |
189 | ||
190 | if (found_file < 0) | |
191 | temp_pathname = NULL; | |
192 | else | |
193 | temp_pathname = xstrdup (temp_pathname); | |
194 | ||
f822c95b | 195 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
196 | absolute at this point, make it relative. (openp will try and open the |
197 | file according to its absolute path otherwise, which is not what we want.) | |
198 | Affects subsequent searches for this solib. */ | |
199 | if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname)) | |
200 | { | |
201 | /* First, get rid of any drive letters etc. */ | |
202 | while (!IS_DIR_SEPARATOR (*in_pathname)) | |
203 | in_pathname++; | |
204 | ||
205 | /* Next, get rid of all leading dir separators. */ | |
206 | while (IS_DIR_SEPARATOR (*in_pathname)) | |
207 | in_pathname++; | |
208 | } | |
209 | ||
c8c18e65 | 210 | /* If not found, search the solib_search_path (if any). */ |
e4f7b8c8 | 211 | if (found_file < 0 && solib_search_path != NULL) |
014d698b | 212 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
fbdebf46 | 213 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ba5f0d88 OF |
214 | |
215 | /* If not found, next search the solib_search_path (if any) for the basename | |
216 | only (ignoring the path). This is to allow reading solibs from a path | |
217 | that differs from the opened path. */ | |
218 | if (found_file < 0 && solib_search_path != NULL) | |
014d698b | 219 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
fbdebf46 | 220 | lbasename (in_pathname), O_RDONLY | O_BINARY, |
ba5f0d88 | 221 | &temp_pathname); |
e4f7b8c8 | 222 | |
2610b0bf | 223 | /* If not found, try to use target supplied solib search method */ |
66aba65d | 224 | if (found_file < 0 && ops->find_and_open_solib) |
637d6690 | 225 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 226 | &temp_pathname); |
2610b0bf | 227 | |
e4f7b8c8 | 228 | /* If not found, next search the inferior's $PATH environment variable. */ |
f822c95b | 229 | if (found_file < 0 && gdb_sysroot_is_empty) |
e4f7b8c8 | 230 | found_file = openp (get_in_environ (inferior_environ, "PATH"), |
fbdebf46 | 231 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, |
014d698b | 232 | &temp_pathname); |
e4f7b8c8 MS |
233 | |
234 | /* If not found, next search the inferior's $LD_LIBRARY_PATH | |
235 | environment variable. */ | |
f822c95b | 236 | if (found_file < 0 && gdb_sysroot_is_empty) |
e4f7b8c8 | 237 | found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"), |
fbdebf46 | 238 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, |
014d698b | 239 | &temp_pathname); |
e4f7b8c8 | 240 | |
572d275c UW |
241 | *fd = found_file; |
242 | return temp_pathname; | |
243 | } | |
244 | ||
245 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, | |
246 | it is used as file handle to open the file. Throws an error if the file | |
247 | could not be opened. Handles both local and remote file access. | |
248 | ||
249 | PATHNAME must be malloc'ed by the caller. If successful, the new BFD's | |
250 | name will point to it. If unsuccessful, PATHNAME will be freed and the | |
251 | FD will be closed (unless FD was -1). */ | |
252 | ||
253 | bfd * | |
254 | solib_bfd_fopen (char *pathname, int fd) | |
255 | { | |
256 | bfd *abfd; | |
257 | ||
258 | if (remote_filename_p (pathname)) | |
259 | { | |
260 | gdb_assert (fd == -1); | |
261 | abfd = remote_bfd_open (pathname, gnutarget); | |
262 | } | |
263 | else | |
264 | { | |
265 | abfd = bfd_fopen (pathname, gnutarget, FOPEN_RB, fd); | |
266 | ||
267 | if (abfd) | |
268 | bfd_set_cacheable (abfd, 1); | |
269 | else if (fd != -1) | |
270 | close (fd); | |
271 | } | |
f1838a98 | 272 | |
f1838a98 UW |
273 | if (!abfd) |
274 | { | |
572d275c | 275 | make_cleanup (xfree, pathname); |
f1838a98 | 276 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 277 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
278 | } |
279 | ||
572d275c UW |
280 | return abfd; |
281 | } | |
282 | ||
283 | /* Find shared library PATHNAME and open a BFD for it. */ | |
284 | ||
285 | bfd * | |
286 | solib_bfd_open (char *pathname) | |
287 | { | |
572d275c UW |
288 | char *found_pathname; |
289 | int found_file; | |
290 | bfd *abfd; | |
378d2b72 | 291 | const struct bfd_arch_info *b; |
572d275c | 292 | |
572d275c UW |
293 | /* Search for shared library file. */ |
294 | found_pathname = solib_find (pathname, &found_file); | |
295 | if (found_pathname == NULL) | |
296 | perror_with_name (pathname); | |
297 | ||
298 | /* Open bfd for shared library. */ | |
299 | abfd = solib_bfd_fopen (found_pathname, found_file); | |
300 | ||
301 | /* Check bfd format. */ | |
f1838a98 | 302 | if (!bfd_check_format (abfd, bfd_object)) |
0997b535 | 303 | { |
f1838a98 | 304 | bfd_close (abfd); |
572d275c | 305 | make_cleanup (xfree, found_pathname); |
f1838a98 | 306 | error (_("`%s': not in executable format: %s"), |
572d275c | 307 | found_pathname, bfd_errmsg (bfd_get_error ())); |
0997b535 | 308 | } |
f1838a98 | 309 | |
378d2b72 HZ |
310 | /* Check bfd arch. */ |
311 | b = gdbarch_bfd_arch_info (target_gdbarch); | |
312 | if (b->compatible (b, bfd_get_arch_info (abfd)) != b) | |
313 | warning (_("`%s': Shared library architecture %s is not compatible " | |
314 | "with target architecture %s."), found_pathname, | |
315 | bfd_get_arch_info (abfd)->printable_name, b->printable_name); | |
316 | ||
f1838a98 | 317 | return abfd; |
e4f7b8c8 MS |
318 | } |
319 | ||
320 | ||
c906108c SS |
321 | /* |
322 | ||
c5aa993b | 323 | LOCAL FUNCTION |
c906108c | 324 | |
c5aa993b | 325 | solib_map_sections -- open bfd and build sections for shared lib |
c906108c | 326 | |
c5aa993b | 327 | SYNOPSIS |
c906108c | 328 | |
c5aa993b | 329 | static int solib_map_sections (struct so_list *so) |
c906108c | 330 | |
c5aa993b | 331 | DESCRIPTION |
c906108c | 332 | |
c5aa993b JM |
333 | Given a pointer to one of the shared objects in our list |
334 | of mapped objects, use the recorded name to open a bfd | |
335 | descriptor for the object, build a section table, and then | |
336 | relocate all the section addresses by the base address at | |
337 | which the shared object was mapped. | |
c906108c | 338 | |
c5aa993b | 339 | FIXMES |
c906108c | 340 | |
c5aa993b JM |
341 | In most (all?) cases the shared object file name recorded in the |
342 | dynamic linkage tables will be a fully qualified pathname. For | |
343 | cases where it isn't, do we really mimic the systems search | |
344 | mechanism correctly in the below code (particularly the tilde | |
345 | expansion stuff?). | |
c906108c SS |
346 | */ |
347 | ||
348 | static int | |
4efb68b1 | 349 | solib_map_sections (void *arg) |
c906108c SS |
350 | { |
351 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
831a0c44 | 352 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
c906108c | 353 | char *filename; |
0542c86d | 354 | struct target_section *p; |
c906108c SS |
355 | struct cleanup *old_chain; |
356 | bfd *abfd; | |
c5aa993b JM |
357 | |
358 | filename = tilde_expand (so->so_name); | |
b8c9b27d | 359 | old_chain = make_cleanup (xfree, filename); |
831a0c44 | 360 | abfd = ops->bfd_open (filename); |
f1838a98 | 361 | do_cleanups (old_chain); |
e4f7b8c8 | 362 | |
13437d4b | 363 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
3db741ef | 364 | so->abfd = gdb_bfd_ref (abfd); |
23e04971 | 365 | |
e4f7b8c8 MS |
366 | /* copy full path name into so_name, so that later symbol_file_add |
367 | can find it */ | |
f1838a98 UW |
368 | if (strlen (bfd_get_filename (abfd)) >= SO_NAME_MAX_PATH_SIZE) |
369 | error (_("Shared library file name is too long.")); | |
370 | strcpy (so->so_name, bfd_get_filename (abfd)); | |
23e04971 | 371 | |
13437d4b | 372 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
23e04971 | 373 | { |
8a3fe4f8 | 374 | error (_("Can't find the file sections in `%s': %s"), |
13437d4b | 375 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
23e04971 | 376 | } |
104c1213 | 377 | |
13437d4b | 378 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 379 | { |
13437d4b KB |
380 | /* Relocate the section binding addresses as recorded in the shared |
381 | object's file by the base address to which the object was actually | |
382 | mapped. */ | |
66aba65d | 383 | ops->relocate_section_addresses (so, p); |
cfa9d6d9 DJ |
384 | |
385 | /* If the target didn't provide information about the address | |
386 | range of the shared object, assume we want the location of | |
387 | the .text section. */ | |
388 | if (so->addr_low == 0 && so->addr_high == 0 | |
389 | && strcmp (p->the_bfd_section->name, ".text") == 0) | |
13437d4b | 390 | { |
cfa9d6d9 DJ |
391 | so->addr_low = p->addr; |
392 | so->addr_high = p->endaddr; | |
13437d4b | 393 | } |
104c1213 JM |
394 | } |
395 | ||
13437d4b | 396 | return (1); |
104c1213 | 397 | } |
c906108c | 398 | |
07cd4b97 | 399 | /* LOCAL FUNCTION |
c906108c | 400 | |
07cd4b97 | 401 | free_so --- free a `struct so_list' object |
c906108c | 402 | |
c5aa993b | 403 | SYNOPSIS |
c906108c | 404 | |
07cd4b97 | 405 | void free_so (struct so_list *so) |
c906108c | 406 | |
c5aa993b | 407 | DESCRIPTION |
c906108c | 408 | |
07cd4b97 JB |
409 | Free the storage associated with the `struct so_list' object SO. |
410 | If we have opened a BFD for SO, close it. | |
c906108c | 411 | |
07cd4b97 JB |
412 | The caller is responsible for removing SO from whatever list it is |
413 | a member of. If we have placed SO's sections in some target's | |
414 | section table, the caller is responsible for removing them. | |
c906108c | 415 | |
07cd4b97 JB |
416 | This function doesn't mess with objfiles at all. If there is an |
417 | objfile associated with SO that needs to be removed, the caller is | |
418 | responsible for taking care of that. */ | |
419 | ||
13437d4b | 420 | void |
07cd4b97 | 421 | free_so (struct so_list *so) |
c906108c | 422 | { |
1cf3db46 | 423 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
c5aa993b | 424 | |
07cd4b97 | 425 | if (so->sections) |
b8c9b27d | 426 | xfree (so->sections); |
07cd4b97 | 427 | |
e3c69974 | 428 | gdb_bfd_unref (so->abfd); |
07cd4b97 | 429 | |
66aba65d | 430 | ops->free_so (so); |
07cd4b97 | 431 | |
b8c9b27d | 432 | xfree (so); |
c906108c SS |
433 | } |
434 | ||
07cd4b97 | 435 | |
f8766ec1 KB |
436 | /* Return address of first so_list entry in master shared object list. */ |
437 | struct so_list * | |
438 | master_so_list (void) | |
439 | { | |
440 | return so_list_head; | |
441 | } | |
442 | ||
7eedccfa PP |
443 | static void |
444 | symbol_add_stub (struct so_list *so, int flags) | |
c906108c | 445 | { |
62557bbc | 446 | struct section_addr_info *sap; |
c906108c | 447 | |
07cd4b97 JB |
448 | /* Have we already loaded this shared object? */ |
449 | ALL_OBJFILES (so->objfile) | |
450 | { | |
451 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
7eedccfa | 452 | return; |
07cd4b97 JB |
453 | } |
454 | ||
62557bbc KB |
455 | sap = build_section_addr_info_from_section_table (so->sections, |
456 | so->sections_end); | |
e7cf9df1 | 457 | |
e3c69974 | 458 | so->objfile = symbol_file_add_from_bfd (so->abfd, flags, sap, OBJF_SHARED); |
62557bbc | 459 | free_section_addr_info (sap); |
c906108c | 460 | |
7eedccfa | 461 | return; |
c906108c SS |
462 | } |
463 | ||
7eedccfa PP |
464 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
465 | be chatty about it. Return non-zero if any symbols were actually | |
42a6e6a0 MK |
466 | loaded. */ |
467 | ||
468 | int | |
7eedccfa | 469 | solib_read_symbols (struct so_list *so, int flags) |
42a6e6a0 | 470 | { |
7eedccfa PP |
471 | const int from_tty = flags & SYMFILE_VERBOSE; |
472 | ||
42a6e6a0 MK |
473 | if (so->symbols_loaded) |
474 | { | |
475 | if (from_tty) | |
a3f17187 | 476 | printf_unfiltered (_("Symbols already loaded for %s\n"), so->so_name); |
42a6e6a0 | 477 | } |
8bb75286 DJ |
478 | else if (so->abfd == NULL) |
479 | { | |
480 | if (from_tty) | |
481 | printf_unfiltered (_("Symbol file not found for %s\n"), so->so_name); | |
482 | } | |
42a6e6a0 MK |
483 | else |
484 | { | |
7eedccfa PP |
485 | volatile struct gdb_exception exception; |
486 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
487 | { | |
488 | symbol_add_stub (so, flags); | |
489 | } | |
490 | if (exception.reason != 0) | |
491 | { | |
492 | exception_fprintf (gdb_stderr, exception, | |
493 | "Error while reading shared library symbols:\n"); | |
494 | return 0; | |
495 | } | |
496 | if (from_tty && print_symbol_loading) | |
497 | printf_unfiltered (_("Loaded symbols for %s\n"), so->so_name); | |
498 | so->symbols_loaded = 1; | |
499 | return 1; | |
42a6e6a0 MK |
500 | } |
501 | ||
502 | return 0; | |
503 | } | |
c906108c | 504 | |
07cd4b97 | 505 | /* LOCAL FUNCTION |
c906108c | 506 | |
105b175f | 507 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 508 | |
c5aa993b | 509 | SYNOPSIS |
c906108c | 510 | |
105b175f | 511 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 512 | |
07cd4b97 | 513 | Extract the list of currently loaded shared objects from the |
105b175f JB |
514 | inferior, and compare it with the list of shared objects currently |
515 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
516 | with the inferior's new list. | |
c906108c | 517 | |
105b175f JB |
518 | If we notice that the inferior has unloaded some shared objects, |
519 | free any symbolic info GDB had read about those shared objects. | |
520 | ||
521 | Don't load symbolic info for any new shared objects; just add them | |
522 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
523 | |
524 | If FROM_TTY is non-null, feel free to print messages about what | |
525 | we're doing. | |
c906108c | 526 | |
07cd4b97 JB |
527 | If TARGET is non-null, add the sections of all new shared objects |
528 | to TARGET's section table. Note that this doesn't remove any | |
529 | sections for shared objects that have been unloaded, and it | |
530 | doesn't check to see if the new shared objects are already present in | |
531 | the section table. But we only use this for core files and | |
532 | processes we've just attached to, so that's okay. */ | |
c906108c | 533 | |
a78f21af | 534 | static void |
105b175f | 535 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 | 536 | { |
1cf3db46 | 537 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 538 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
539 | struct so_list *gdb, **gdb_link; |
540 | ||
181e7f93 PA |
541 | /* We can reach here due to changing solib-search-path or the |
542 | sysroot, before having any inferior. */ | |
50c71eaf | 543 | if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid)) |
181e7f93 PA |
544 | { |
545 | struct inferior *inf = current_inferior (); | |
546 | ||
547 | /* If we are attaching to a running process for which we | |
548 | have not opened a symbol file, we may be able to get its | |
549 | symbols now! */ | |
550 | if (inf->attach_flag && symfile_objfile == NULL) | |
551 | catch_errors (ops->open_symbol_file_object, &from_tty, | |
552 | "Error reading attached process's symbol file.\n", | |
553 | RETURN_MASK_ALL); | |
554 | } | |
104c1213 | 555 | |
07cd4b97 JB |
556 | /* GDB and the inferior's dynamic linker each maintain their own |
557 | list of currently loaded shared objects; we want to bring the | |
558 | former in sync with the latter. Scan both lists, seeing which | |
559 | shared objects appear where. There are three cases: | |
560 | ||
561 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
562 | knows about it already, and it's still loaded in the inferior. |
563 | Nothing needs to happen. | |
07cd4b97 JB |
564 | |
565 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
566 | the inferior has unloaded it. We should remove the shared |
567 | object from GDB's tables. | |
07cd4b97 JB |
568 | |
569 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
570 | means that it's just been loaded. We should add it to GDB's |
571 | tables. | |
07cd4b97 JB |
572 | |
573 | So we walk GDB's list, checking each entry to see if it appears | |
574 | in the inferior's list too. If it does, no action is needed, and | |
575 | we remove it from the inferior's list. If it doesn't, the | |
576 | inferior has unloaded it, and we remove it from GDB's list. By | |
577 | the time we're done walking GDB's list, the inferior's list | |
578 | contains only the new shared objects, which we then add. */ | |
579 | ||
580 | gdb = so_list_head; | |
581 | gdb_link = &so_list_head; | |
582 | while (gdb) | |
c906108c | 583 | { |
07cd4b97 JB |
584 | struct so_list *i = inferior; |
585 | struct so_list **i_link = &inferior; | |
586 | ||
587 | /* Check to see whether the shared object *gdb also appears in | |
588 | the inferior's current list. */ | |
589 | while (i) | |
c906108c | 590 | { |
a7c02bc8 VP |
591 | if (ops->same) |
592 | { | |
593 | if (ops->same (gdb, i)) | |
594 | break; | |
595 | } | |
596 | else | |
597 | { | |
598 | if (! strcmp (gdb->so_original_name, i->so_original_name)) | |
599 | break; | |
600 | } | |
07cd4b97 JB |
601 | |
602 | i_link = &i->next; | |
603 | i = *i_link; | |
c906108c | 604 | } |
c5aa993b | 605 | |
07cd4b97 JB |
606 | /* If the shared object appears on the inferior's list too, then |
607 | it's still loaded, so we don't need to do anything. Delete | |
608 | it from the inferior's list, and leave it on GDB's list. */ | |
609 | if (i) | |
c906108c | 610 | { |
07cd4b97 | 611 | *i_link = i->next; |
07cd4b97 JB |
612 | free_so (i); |
613 | gdb_link = &gdb->next; | |
614 | gdb = *gdb_link; | |
615 | } | |
616 | ||
617 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
618 | else | |
619 | { | |
42a6e6a0 MK |
620 | /* Notify any observer that the shared object has been |
621 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
622 | observer_notify_solib_unloaded (gdb); |
623 | ||
07cd4b97 | 624 | *gdb_link = gdb->next; |
07cd4b97 JB |
625 | |
626 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 627 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
628 | free_objfile (gdb->objfile); |
629 | ||
630 | /* Some targets' section tables might be referring to | |
631 | sections from so->abfd; remove them. */ | |
632 | remove_target_sections (gdb->abfd); | |
633 | ||
634 | free_so (gdb); | |
635 | gdb = *gdb_link; | |
c906108c SS |
636 | } |
637 | } | |
c5aa993b | 638 | |
07cd4b97 JB |
639 | /* Now the inferior's list contains only shared objects that don't |
640 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 641 | to GDB's shared object list. */ |
07cd4b97 | 642 | if (inferior) |
c906108c | 643 | { |
07cd4b97 JB |
644 | struct so_list *i; |
645 | ||
646 | /* Add the new shared objects to GDB's list. */ | |
647 | *gdb_link = inferior; | |
648 | ||
e8930304 | 649 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 650 | for (i = inferior; i; i = i->next) |
c906108c | 651 | { |
07cd4b97 JB |
652 | i->from_tty = from_tty; |
653 | ||
654 | /* Fill in the rest of the `struct so_list' node. */ | |
655 | catch_errors (solib_map_sections, i, | |
656 | "Error while mapping shared library sections:\n", | |
657 | RETURN_MASK_ALL); | |
07cd4b97 | 658 | |
07b82ea5 PA |
659 | /* Add the shared object's sections to the current set of |
660 | file section tables. Do this immediately after mapping | |
661 | the object so that later nodes in the list can query this | |
662 | object, as is needed in solib-osf.c. */ | |
663 | add_target_sections (i->sections, i->sections_end); | |
42a6e6a0 MK |
664 | |
665 | /* Notify any observer that the shared object has been | |
666 | loaded now that we've added it to GDB's tables. */ | |
667 | observer_notify_solib_loaded (i); | |
c906108c | 668 | } |
e8930304 | 669 | } |
105b175f JB |
670 | } |
671 | ||
17a37d48 PP |
672 | |
673 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
674 | |
675 | Uses a fairly simplistic heuristic approach where we check | |
676 | the file name against "/libpthread". This can lead to false | |
677 | positives, but this should be good enough in practice. */ | |
678 | ||
17a37d48 PP |
679 | int |
680 | libpthread_name_p (const char *name) | |
681 | { | |
682 | return (strstr (name, "/libpthread") != NULL); | |
683 | } | |
684 | ||
685 | /* Return non-zero if SO is the libpthread shared library. */ | |
686 | ||
6612ad7f JB |
687 | static int |
688 | libpthread_solib_p (struct so_list *so) | |
689 | { | |
17a37d48 | 690 | return libpthread_name_p (so->so_name); |
6612ad7f | 691 | } |
105b175f JB |
692 | |
693 | /* GLOBAL FUNCTION | |
694 | ||
695 | solib_add -- read in symbol info for newly added shared libraries | |
696 | ||
697 | SYNOPSIS | |
698 | ||
990f9fe3 FF |
699 | void solib_add (char *pattern, int from_tty, struct target_ops |
700 | *TARGET, int readsyms) | |
105b175f JB |
701 | |
702 | DESCRIPTION | |
703 | ||
704 | Read in symbolic information for any shared objects whose names | |
705 | match PATTERN. (If we've already read a shared object's symbol | |
706 | info, leave it alone.) If PATTERN is zero, read them all. | |
707 | ||
990f9fe3 FF |
708 | If READSYMS is 0, defer reading symbolic information until later |
709 | but still do any needed low level processing. | |
710 | ||
105b175f JB |
711 | FROM_TTY and TARGET are as described for update_solib_list, above. */ |
712 | ||
713 | void | |
990f9fe3 | 714 | solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms) |
105b175f JB |
715 | { |
716 | struct so_list *gdb; | |
717 | ||
718 | if (pattern) | |
719 | { | |
720 | char *re_err = re_comp (pattern); | |
721 | ||
722 | if (re_err) | |
8a3fe4f8 | 723 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
724 | } |
725 | ||
726 | update_solib_list (from_tty, target); | |
c906108c | 727 | |
105b175f JB |
728 | /* Walk the list of currently loaded shared libraries, and read |
729 | symbols for any that match the pattern --- or any whose symbols | |
730 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
731 | { |
732 | int any_matches = 0; | |
733 | int loaded_any_symbols = 0; | |
7eedccfa PP |
734 | const int flags = |
735 | SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0); | |
c906108c | 736 | |
e8930304 JB |
737 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
738 | if (! pattern || re_exec (gdb->so_name)) | |
739 | { | |
6612ad7f JB |
740 | /* Normally, we would read the symbols from that library |
741 | only if READSYMS is set. However, we're making a small | |
742 | exception for the pthread library, because we sometimes | |
743 | need the library symbols to be loaded in order to provide | |
744 | thread support (x86-linux for instance). */ | |
745 | const int add_this_solib = | |
746 | (readsyms || libpthread_solib_p (gdb)); | |
747 | ||
e8930304 | 748 | any_matches = 1; |
7eedccfa | 749 | if (add_this_solib && solib_read_symbols (gdb, flags)) |
42a6e6a0 | 750 | loaded_any_symbols = 1; |
e8930304 JB |
751 | } |
752 | ||
7eedccfa PP |
753 | if (loaded_any_symbols) |
754 | breakpoint_re_set (); | |
755 | ||
e8930304 JB |
756 | if (from_tty && pattern && ! any_matches) |
757 | printf_unfiltered | |
758 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
759 | ||
760 | if (loaded_any_symbols) | |
761 | { | |
1cf3db46 | 762 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 763 | |
e8930304 JB |
764 | /* Getting new symbols may change our opinion about what is |
765 | frameless. */ | |
766 | reinit_frame_cache (); | |
767 | ||
66aba65d | 768 | ops->special_symbol_handling (); |
e8930304 JB |
769 | } |
770 | } | |
c906108c SS |
771 | } |
772 | ||
07cd4b97 | 773 | |
c906108c SS |
774 | /* |
775 | ||
c5aa993b | 776 | LOCAL FUNCTION |
c906108c | 777 | |
c5aa993b | 778 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 779 | |
c5aa993b | 780 | SYNOPSIS |
c906108c | 781 | |
c5aa993b | 782 | static void info_sharedlibrary_command () |
c906108c | 783 | |
c5aa993b | 784 | DESCRIPTION |
c906108c | 785 | |
c5aa993b JM |
786 | Walk through the shared library list and print information |
787 | about each attached library. | |
788 | */ | |
c906108c SS |
789 | |
790 | static void | |
fba45db2 | 791 | info_sharedlibrary_command (char *ignore, int from_tty) |
c906108c | 792 | { |
52f0bd74 | 793 | struct so_list *so = NULL; /* link map state variable */ |
c906108c SS |
794 | int header_done = 0; |
795 | int addr_width; | |
c906108c | 796 | |
84eb3c4f | 797 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
1cf3db46 | 798 | addr_width = 4 + (gdbarch_ptr_bit (target_gdbarch) / 4); |
c906108c | 799 | |
105b175f | 800 | update_solib_list (from_tty, 0); |
07cd4b97 JB |
801 | |
802 | for (so = so_list_head; so; so = so->next) | |
c906108c | 803 | { |
c5aa993b | 804 | if (so->so_name[0]) |
c906108c SS |
805 | { |
806 | if (!header_done) | |
807 | { | |
c5aa993b JM |
808 | printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
809 | addr_width, "To", "Syms Read", | |
810 | "Shared Object Library"); | |
c906108c SS |
811 | header_done++; |
812 | } | |
813 | ||
814 | printf_unfiltered ("%-*s", addr_width, | |
cfa9d6d9 | 815 | so->addr_high != 0 |
bb599908 | 816 | ? hex_string_custom ( |
cfa9d6d9 | 817 | (LONGEST) so->addr_low, |
bb599908 | 818 | addr_width - 4) |
749499cb | 819 | : ""); |
c906108c | 820 | printf_unfiltered ("%-*s", addr_width, |
cfa9d6d9 | 821 | so->addr_high != 0 |
bb599908 | 822 | ? hex_string_custom ( |
cfa9d6d9 | 823 | (LONGEST) so->addr_high, |
bb599908 | 824 | addr_width - 4) |
749499cb | 825 | : ""); |
c5aa993b JM |
826 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); |
827 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
828 | } |
829 | } | |
830 | if (so_list_head == NULL) | |
831 | { | |
a3f17187 | 832 | printf_unfiltered (_("No shared libraries loaded at this time.\n")); |
c906108c SS |
833 | } |
834 | } | |
835 | ||
5fd1a349 PP |
836 | /* Return 1 if ADDRESS lies within SOLIB. */ |
837 | ||
838 | int | |
839 | solib_contains_address_p (const struct so_list *const solib, | |
840 | CORE_ADDR address) | |
841 | { | |
0542c86d | 842 | struct target_section *p; |
5fd1a349 PP |
843 | |
844 | for (p = solib->sections; p < solib->sections_end; p++) | |
845 | if (p->addr <= address && address < p->endaddr) | |
846 | return 1; | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
c906108c SS |
851 | /* |
852 | ||
c5aa993b | 853 | GLOBAL FUNCTION |
c906108c | 854 | |
f5c9a895 PP |
855 | solib_name_from_address -- if an address is in a shared lib, return |
856 | its name. | |
c906108c | 857 | |
c5aa993b | 858 | SYNOPSIS |
c906108c | 859 | |
f5c9a895 | 860 | char * solib_name_from_address (CORE_ADDR address) |
c906108c | 861 | |
c5aa993b | 862 | DESCRIPTION |
c906108c | 863 | |
c5aa993b JM |
864 | Provides a hook for other gdb routines to discover whether or |
865 | not a particular address is within the mapped address space of | |
749499cb | 866 | a shared library. |
c906108c | 867 | |
c5aa993b JM |
868 | For example, this routine is called at one point to disable |
869 | breakpoints which are in shared libraries that are not currently | |
870 | mapped in. | |
c906108c SS |
871 | */ |
872 | ||
873 | char * | |
f5c9a895 | 874 | solib_name_from_address (CORE_ADDR address) |
c906108c | 875 | { |
52f0bd74 | 876 | struct so_list *so = 0; /* link map state variable */ |
c5aa993b | 877 | |
07cd4b97 | 878 | for (so = so_list_head; so; so = so->next) |
5fd1a349 PP |
879 | if (solib_contains_address_p (so, address)) |
880 | return (so->so_name); | |
07cd4b97 | 881 | |
c906108c SS |
882 | return (0); |
883 | } | |
884 | ||
885 | /* Called by free_all_symtabs */ | |
886 | ||
c5aa993b | 887 | void |
fba45db2 | 888 | clear_solib (void) |
c906108c | 889 | { |
1cf3db46 | 890 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 891 | |
085dd6e6 JM |
892 | /* This function is expected to handle ELF shared libraries. It is |
893 | also used on Solaris, which can run either ELF or a.out binaries | |
894 | (for compatibility with SunOS 4), both of which can use shared | |
895 | libraries. So we don't know whether we have an ELF executable or | |
896 | an a.out executable until the user chooses an executable file. | |
897 | ||
898 | ELF shared libraries don't get mapped into the address space | |
899 | until after the program starts, so we'd better not try to insert | |
900 | breakpoints in them immediately. We have to wait until the | |
901 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
902 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
903 | it's ready. | |
904 | ||
905 | SunOS shared libraries seem to be different --- they're present | |
906 | as soon as the process begins execution, so there's no need to | |
907 | put off inserting breakpoints. There's also nowhere to put a | |
908 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
909 | around to it. | |
910 | ||
911 | So: disable breakpoints only if we're using ELF shared libs. */ | |
912 | if (exec_bfd != NULL | |
913 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
cb851954 | 914 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 915 | |
c906108c SS |
916 | while (so_list_head) |
917 | { | |
07cd4b97 JB |
918 | struct so_list *so = so_list_head; |
919 | so_list_head = so->next; | |
c86cf029 | 920 | observer_notify_solib_unloaded (so); |
2069d78d KB |
921 | if (so->abfd) |
922 | remove_target_sections (so->abfd); | |
07cd4b97 | 923 | free_so (so); |
c906108c | 924 | } |
07cd4b97 | 925 | |
66aba65d | 926 | ops->clear_solib (); |
c906108c SS |
927 | } |
928 | ||
13437d4b | 929 | /* GLOBAL FUNCTION |
c5aa993b JM |
930 | |
931 | solib_create_inferior_hook -- shared library startup support | |
932 | ||
933 | SYNOPSIS | |
934 | ||
7095b863 | 935 | void solib_create_inferior_hook () |
c5aa993b JM |
936 | |
937 | DESCRIPTION | |
938 | ||
939 | When gdb starts up the inferior, it nurses it along (through the | |
940 | shell) until it is ready to execute it's first instruction. At this | |
941 | point, this function gets called via expansion of the macro | |
13437d4b | 942 | SOLIB_CREATE_INFERIOR_HOOK. */ |
c5aa993b JM |
943 | |
944 | void | |
fba45db2 | 945 | solib_create_inferior_hook (void) |
c906108c | 946 | { |
1cf3db46 | 947 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 948 | ops->solib_create_inferior_hook(); |
c906108c SS |
949 | } |
950 | ||
d7fa2ae2 KB |
951 | /* GLOBAL FUNCTION |
952 | ||
953 | in_solib_dynsym_resolve_code -- check to see if an address is in | |
954 | dynamic loader's dynamic symbol | |
955 | resolution code | |
956 | ||
957 | SYNOPSIS | |
958 | ||
959 | int in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
960 | ||
961 | DESCRIPTION | |
962 | ||
963 | Determine if PC is in the dynamic linker's symbol resolution | |
964 | code. Return 1 if so, 0 otherwise. | |
965 | */ | |
966 | ||
967 | int | |
968 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
969 | { | |
1cf3db46 | 970 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 971 | return ops->in_dynsym_resolve_code (pc); |
d7fa2ae2 | 972 | } |
c906108c SS |
973 | |
974 | /* | |
975 | ||
c5aa993b | 976 | LOCAL FUNCTION |
c906108c | 977 | |
c5aa993b | 978 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 979 | |
c5aa993b | 980 | SYNOPSIS |
c906108c | 981 | |
c5aa993b | 982 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 983 | |
c5aa993b | 984 | DESCRIPTION |
c906108c | 985 | |
c5aa993b | 986 | */ |
c906108c SS |
987 | |
988 | static void | |
fba45db2 | 989 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
990 | { |
991 | dont_repeat (); | |
990f9fe3 | 992 | solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
993 | } |
994 | ||
cb0ba49e MS |
995 | /* LOCAL FUNCTION |
996 | ||
997 | no_shared_libraries -- handle command to explicitly discard symbols | |
998 | from shared libraries. | |
999 | ||
1000 | DESCRIPTION | |
1001 | ||
1002 | Implements the command "nosharedlibrary", which discards symbols | |
1003 | that have been auto-loaded from shared libraries. Symbols from | |
1004 | shared libraries that were added by explicit request of the user | |
1005 | are not discarded. Also called from remote.c. */ | |
1006 | ||
c60a7562 MS |
1007 | void |
1008 | no_shared_libraries (char *ignored, int from_tty) | |
1009 | { | |
a3247a22 PP |
1010 | /* The order of the two routines below is important: clear_solib notifies |
1011 | the solib_unloaded observers, and some of these observers might need | |
1012 | access to their associated objfiles. Therefore, we can not purge the | |
1013 | solibs' objfiles before clear_solib has been called. */ | |
1014 | ||
615b9dba | 1015 | clear_solib (); |
a3247a22 | 1016 | objfile_purge_solibs (); |
c60a7562 | 1017 | } |
c906108c | 1018 | |
cf466558 | 1019 | static void |
f397e303 AC |
1020 | reload_shared_libraries (char *ignored, int from_tty, |
1021 | struct cmd_list_element *e) | |
cf466558 KB |
1022 | { |
1023 | no_shared_libraries (NULL, from_tty); | |
1024 | solib_add (NULL, from_tty, NULL, auto_solib_add); | |
c8fa6cdd VP |
1025 | /* Creating inferior hooks here has two purposes. First, if we reload |
1026 | shared libraries then the address of solib breakpoint we've computed | |
1027 | previously might be no longer valid. For example, if we forgot to set | |
1028 | solib-absolute-prefix and are setting it right now, then the previous | |
1029 | breakpoint address is plain wrong. Second, installing solib hooks | |
1030 | also implicitly figures were ld.so is and loads symbols for it. | |
1031 | Absent this call, if we've just connected to a target and set | |
1032 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1033 | about ld.so. */ | |
1034 | if (target_has_execution) | |
1035 | { | |
1036 | #ifdef SOLIB_CREATE_INFERIOR_HOOK | |
1037 | SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid)); | |
1038 | #else | |
1039 | solib_create_inferior_hook (); | |
1040 | #endif | |
1041 | } | |
1042 | /* We have unloaded and then reloaded debug info for all shared libraries. | |
1043 | However, frames may still reference them, for example a frame's | |
1044 | unwinder might still point of DWARF FDE structures that are now freed. | |
1045 | Reinit frame cache to avoid crashing. */ | |
1046 | reinit_frame_cache (); | |
cf466558 KB |
1047 | } |
1048 | ||
920d2a44 AC |
1049 | static void |
1050 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1051 | struct cmd_list_element *c, const char *value) | |
1052 | { | |
1053 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
1054 | value); | |
1055 | } | |
1056 | ||
1057 | ||
3a40aaa0 UW |
1058 | /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call |
1059 | the library-specific handler if it is installed for the current target. */ | |
1060 | ||
1061 | struct symbol * | |
1062 | solib_global_lookup (const struct objfile *objfile, | |
1063 | const char *name, | |
1064 | const char *linkage_name, | |
21b556f4 | 1065 | const domain_enum domain) |
3a40aaa0 | 1066 | { |
1cf3db46 | 1067 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
3a40aaa0 | 1068 | |
e8a92f7b | 1069 | if (ops->lookup_lib_global_symbol != NULL) |
21b556f4 | 1070 | return ops->lookup_lib_global_symbol (objfile, name, linkage_name, domain); |
3a40aaa0 UW |
1071 | return NULL; |
1072 | } | |
1073 | ||
1074 | ||
a78f21af AC |
1075 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
1076 | ||
c906108c | 1077 | void |
fba45db2 | 1078 | _initialize_solib (void) |
c906108c | 1079 | { |
fa58ee11 EZ |
1080 | struct cmd_list_element *c; |
1081 | ||
66aba65d MK |
1082 | solib_data = gdbarch_data_register_pre_init (solib_init); |
1083 | ||
c906108c | 1084 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1085 | _("Load shared object library symbols for files matching REGEXP.")); |
c5aa993b | 1086 | add_info ("sharedlibrary", info_sharedlibrary_command, |
1bedd215 | 1087 | _("Status of loaded shared object libraries.")); |
c60a7562 | 1088 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1089 | _("Unload all shared object library symbols.")); |
c906108c | 1090 | |
5bf193a2 AC |
1091 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1092 | &auto_solib_add, _("\ | |
1093 | Set autoloading of shared library symbols."), _("\ | |
1094 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1095 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1096 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1097 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
5bf193a2 AC |
1098 | inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."), |
1099 | NULL, | |
920d2a44 | 1100 | show_auto_solib_add, |
5bf193a2 | 1101 | &setlist, &showlist); |
c906108c | 1102 | |
f822c95b DJ |
1103 | add_setshow_filename_cmd ("sysroot", class_support, |
1104 | &gdb_sysroot, _("\ | |
1105 | Set an alternate system root."), _("\ | |
1106 | Show the current system root."), _("\ | |
1107 | The system root is used to load absolute shared library symbol files.\n\ | |
1108 | For other (relative) files, you can add directories using\n\ | |
1109 | `set solib-search-path'."), | |
f397e303 AC |
1110 | reload_shared_libraries, |
1111 | NULL, | |
1112 | &setlist, &showlist); | |
c906108c | 1113 | |
f822c95b DJ |
1114 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, |
1115 | &setlist); | |
1116 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, | |
1117 | &showlist); | |
030292b7 | 1118 | |
525226b5 AC |
1119 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1120 | &solib_search_path, _("\ | |
1121 | Set the search path for loading non-absolute shared library symbol files."), _("\ | |
1122 | Show the search path for loading non-absolute shared library symbol files."), _("\ | |
1123 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."), | |
1124 | reload_shared_libraries, | |
920d2a44 | 1125 | show_solib_search_path, |
525226b5 | 1126 | &setlist, &showlist); |
c906108c | 1127 | } |