Commit | Line | Data |
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13437d4b | 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
14a5e767 AC |
2 | |
3 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
030292b7 | 4 | 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c | 22 | |
c906108c SS |
23 | #include "defs.h" |
24 | ||
c906108c | 25 | #include <sys/types.h> |
c906108c | 26 | #include <fcntl.h> |
13437d4b | 27 | #include "gdb_string.h" |
c906108c SS |
28 | #include "symtab.h" |
29 | #include "bfd.h" | |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
60250e8b | 32 | #include "exceptions.h" |
c906108c SS |
33 | #include "gdbcore.h" |
34 | #include "command.h" | |
35 | #include "target.h" | |
36 | #include "frame.h" | |
88987551 | 37 | #include "gdb_regex.h" |
c906108c SS |
38 | #include "inferior.h" |
39 | #include "environ.h" | |
40 | #include "language.h" | |
41 | #include "gdbcmd.h" | |
fa58ee11 | 42 | #include "completer.h" |
fe4e3eb8 | 43 | #include "filenames.h" /* for DOSish file names */ |
4646aa9d | 44 | #include "exec.h" |
13437d4b | 45 | #include "solist.h" |
84acb35a | 46 | #include "observer.h" |
dbda9972 | 47 | #include "readline/readline.h" |
c906108c | 48 | |
13437d4b | 49 | /* external data declarations */ |
c906108c | 50 | |
13437d4b KB |
51 | /* FIXME: gdbarch needs to control this variable */ |
52 | struct target_so_ops *current_target_so_ops; | |
23e04971 MS |
53 | |
54 | /* local data declarations */ | |
07cd4b97 | 55 | |
c906108c | 56 | static struct so_list *so_list_head; /* List of known shared objects */ |
23e04971 | 57 | |
c5aa993b | 58 | static int solib_cleanup_queued = 0; /* make_run_cleanup called */ |
c906108c | 59 | |
c906108c SS |
60 | /* Local function prototypes */ |
61 | ||
4efb68b1 | 62 | static void do_clear_solib (void *); |
c906108c | 63 | |
c906108c SS |
64 | /* If non-zero, this is a prefix that will be added to the front of the name |
65 | shared libraries with an absolute filename for loading. */ | |
66 | static char *solib_absolute_prefix = NULL; | |
67 | ||
68 | /* If non-empty, this is a search path for loading non-absolute shared library | |
69 | symbol files. This takes precedence over the environment variables PATH | |
70 | and LD_LIBRARY_PATH. */ | |
71 | static char *solib_search_path = NULL; | |
72 | ||
e4f7b8c8 MS |
73 | /* |
74 | ||
75 | GLOBAL FUNCTION | |
76 | ||
77 | solib_open -- Find a shared library file and open it. | |
78 | ||
79 | SYNOPSIS | |
80 | ||
81 | int solib_open (char *in_patname, char **found_pathname); | |
82 | ||
83 | DESCRIPTION | |
84 | ||
85 | Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory | |
86 | to search for shared libraries if they have an absolute path. | |
87 | ||
88 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
89 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
90 | shared libraries if not found in SOLIB_ABSOLUTE_PREFIX. | |
91 | ||
c8c18e65 KW |
92 | Search algorithm: |
93 | * If there is a solib_absolute_prefix and path is absolute: | |
94 | * Search for solib_absolute_prefix/path. | |
95 | * else | |
96 | * Look for it literally (unmodified). | |
e4f7b8c8 | 97 | * Look in SOLIB_SEARCH_PATH. |
f43caff8 | 98 | * If available, use target defined search function. |
c8c18e65 KW |
99 | * If solib_absolute_prefix is NOT set, perform the following two searches: |
100 | * Look in inferior's $PATH. | |
101 | * Look in inferior's $LD_LIBRARY_PATH. | |
102 | * | |
103 | * The last check avoids doing this search when targetting remote | |
104 | * machines since solib_absolute_prefix will almost always be set. | |
e4f7b8c8 MS |
105 | |
106 | RETURNS | |
b21f0843 | 107 | |
e4f7b8c8 MS |
108 | file handle for opened solib, or -1 for failure. */ |
109 | ||
110 | int | |
111 | solib_open (char *in_pathname, char **found_pathname) | |
112 | { | |
113 | int found_file = -1; | |
114 | char *temp_pathname = NULL; | |
fe4e3eb8 | 115 | char *p = in_pathname; |
e4f7b8c8 | 116 | |
fe4e3eb8 EZ |
117 | while (*p && !IS_DIR_SEPARATOR (*p)) |
118 | p++; | |
119 | ||
120 | if (*p) | |
e4f7b8c8 | 121 | { |
fe4e3eb8 | 122 | if (! IS_ABSOLUTE_PATH (in_pathname) || solib_absolute_prefix == NULL) |
a7ec76fe KB |
123 | temp_pathname = in_pathname; |
124 | else | |
125 | { | |
b21f0843 | 126 | int prefix_len = strlen (solib_absolute_prefix); |
a7ec76fe KB |
127 | |
128 | /* Remove trailing slashes from absolute prefix. */ | |
b21f0843 | 129 | while (prefix_len > 0 |
fe4e3eb8 | 130 | && IS_DIR_SEPARATOR (solib_absolute_prefix[prefix_len - 1])) |
a7ec76fe KB |
131 | prefix_len--; |
132 | ||
133 | /* Cat the prefixed pathname together. */ | |
134 | temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1); | |
135 | strncpy (temp_pathname, solib_absolute_prefix, prefix_len); | |
136 | temp_pathname[prefix_len] = '\0'; | |
137 | strcat (temp_pathname, in_pathname); | |
a7ec76fe | 138 | } |
b21f0843 | 139 | |
e4f7b8c8 MS |
140 | /* Now see if we can open it. */ |
141 | found_file = open (temp_pathname, O_RDONLY, 0); | |
142 | } | |
143 | ||
ba5f0d88 OF |
144 | /* If the search in solib_absolute_prefix failed, and the path name is |
145 | absolute at this point, make it relative. (openp will try and open the | |
146 | file according to its absolute path otherwise, which is not what we want.) | |
147 | Affects subsequent searches for this solib. */ | |
148 | if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname)) | |
149 | { | |
150 | /* First, get rid of any drive letters etc. */ | |
151 | while (!IS_DIR_SEPARATOR (*in_pathname)) | |
152 | in_pathname++; | |
153 | ||
154 | /* Next, get rid of all leading dir separators. */ | |
155 | while (IS_DIR_SEPARATOR (*in_pathname)) | |
156 | in_pathname++; | |
157 | } | |
158 | ||
c8c18e65 | 159 | /* If not found, search the solib_search_path (if any). */ |
e4f7b8c8 | 160 | if (found_file < 0 && solib_search_path != NULL) |
014d698b EZ |
161 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
162 | in_pathname, O_RDONLY, 0, &temp_pathname); | |
ba5f0d88 OF |
163 | |
164 | /* If not found, next search the solib_search_path (if any) for the basename | |
165 | only (ignoring the path). This is to allow reading solibs from a path | |
166 | that differs from the opened path. */ | |
167 | if (found_file < 0 && solib_search_path != NULL) | |
014d698b EZ |
168 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
169 | lbasename (in_pathname), O_RDONLY, 0, | |
ba5f0d88 | 170 | &temp_pathname); |
e4f7b8c8 | 171 | |
2610b0bf KW |
172 | /* If not found, try to use target supplied solib search method */ |
173 | if (found_file < 0 && TARGET_SO_FIND_AND_OPEN_SOLIB != NULL) | |
174 | found_file = TARGET_SO_FIND_AND_OPEN_SOLIB | |
175 | (in_pathname, O_RDONLY, &temp_pathname); | |
176 | ||
e4f7b8c8 | 177 | /* If not found, next search the inferior's $PATH environment variable. */ |
c8c18e65 | 178 | if (found_file < 0 && solib_absolute_prefix == NULL) |
e4f7b8c8 | 179 | found_file = openp (get_in_environ (inferior_environ, "PATH"), |
014d698b EZ |
180 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY, 0, |
181 | &temp_pathname); | |
e4f7b8c8 MS |
182 | |
183 | /* If not found, next search the inferior's $LD_LIBRARY_PATH | |
184 | environment variable. */ | |
c8c18e65 | 185 | if (found_file < 0 && solib_absolute_prefix == NULL) |
e4f7b8c8 | 186 | found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"), |
014d698b EZ |
187 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY, 0, |
188 | &temp_pathname); | |
e4f7b8c8 MS |
189 | |
190 | /* Done. If not found, tough luck. Return found_file and | |
191 | (optionally) found_pathname. */ | |
a7ec76fe | 192 | if (found_pathname != NULL && temp_pathname != NULL) |
4fcf66da | 193 | *found_pathname = xstrdup (temp_pathname); |
e4f7b8c8 MS |
194 | return found_file; |
195 | } | |
196 | ||
197 | ||
c906108c SS |
198 | /* |
199 | ||
c5aa993b | 200 | LOCAL FUNCTION |
c906108c | 201 | |
c5aa993b | 202 | solib_map_sections -- open bfd and build sections for shared lib |
c906108c | 203 | |
c5aa993b | 204 | SYNOPSIS |
c906108c | 205 | |
c5aa993b | 206 | static int solib_map_sections (struct so_list *so) |
c906108c | 207 | |
c5aa993b | 208 | DESCRIPTION |
c906108c | 209 | |
c5aa993b JM |
210 | Given a pointer to one of the shared objects in our list |
211 | of mapped objects, use the recorded name to open a bfd | |
212 | descriptor for the object, build a section table, and then | |
213 | relocate all the section addresses by the base address at | |
214 | which the shared object was mapped. | |
c906108c | 215 | |
c5aa993b | 216 | FIXMES |
c906108c | 217 | |
c5aa993b JM |
218 | In most (all?) cases the shared object file name recorded in the |
219 | dynamic linkage tables will be a fully qualified pathname. For | |
220 | cases where it isn't, do we really mimic the systems search | |
221 | mechanism correctly in the below code (particularly the tilde | |
222 | expansion stuff?). | |
c906108c SS |
223 | */ |
224 | ||
225 | static int | |
4efb68b1 | 226 | solib_map_sections (void *arg) |
c906108c SS |
227 | { |
228 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
229 | char *filename; | |
230 | char *scratch_pathname; | |
231 | int scratch_chan; | |
232 | struct section_table *p; | |
233 | struct cleanup *old_chain; | |
234 | bfd *abfd; | |
c5aa993b JM |
235 | |
236 | filename = tilde_expand (so->so_name); | |
237 | ||
b8c9b27d | 238 | old_chain = make_cleanup (xfree, filename); |
e4f7b8c8 | 239 | scratch_chan = solib_open (filename, &scratch_pathname); |
c906108c | 240 | |
c906108c SS |
241 | if (scratch_chan < 0) |
242 | { | |
13437d4b KB |
243 | perror_with_name (filename); |
244 | } | |
104c1213 | 245 | |
e4f7b8c8 | 246 | /* Leave scratch_pathname allocated. abfd->name will point to it. */ |
13437d4b KB |
247 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); |
248 | if (!abfd) | |
23e04971 | 249 | { |
13437d4b KB |
250 | close (scratch_chan); |
251 | error ("Could not open `%s' as an executable file: %s", | |
252 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
253 | } | |
e4f7b8c8 | 254 | |
13437d4b KB |
255 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
256 | so->abfd = abfd; | |
549c1eea | 257 | bfd_set_cacheable (abfd, 1); |
23e04971 | 258 | |
e4f7b8c8 MS |
259 | /* copy full path name into so_name, so that later symbol_file_add |
260 | can find it */ | |
13437d4b KB |
261 | if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE) |
262 | error ("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure."); | |
263 | strcpy (so->so_name, scratch_pathname); | |
23e04971 | 264 | |
13437d4b KB |
265 | if (!bfd_check_format (abfd, bfd_object)) |
266 | { | |
267 | error ("\"%s\": not in executable format: %s.", | |
268 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
23e04971 | 269 | } |
13437d4b | 270 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
23e04971 | 271 | { |
13437d4b KB |
272 | error ("Can't find the file sections in `%s': %s", |
273 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
23e04971 | 274 | } |
104c1213 | 275 | |
13437d4b | 276 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 277 | { |
13437d4b KB |
278 | /* Relocate the section binding addresses as recorded in the shared |
279 | object's file by the base address to which the object was actually | |
280 | mapped. */ | |
749499cb | 281 | TARGET_SO_RELOCATE_SECTION_ADDRESSES (so, p); |
6314a349 | 282 | if (strcmp (p->the_bfd_section->name, ".text") == 0) |
13437d4b KB |
283 | { |
284 | so->textsection = p; | |
285 | } | |
104c1213 JM |
286 | } |
287 | ||
13437d4b KB |
288 | /* Free the file names, close the file now. */ |
289 | do_cleanups (old_chain); | |
104c1213 | 290 | |
13437d4b | 291 | return (1); |
104c1213 | 292 | } |
c906108c | 293 | |
07cd4b97 | 294 | /* LOCAL FUNCTION |
c906108c | 295 | |
07cd4b97 | 296 | free_so --- free a `struct so_list' object |
c906108c | 297 | |
c5aa993b | 298 | SYNOPSIS |
c906108c | 299 | |
07cd4b97 | 300 | void free_so (struct so_list *so) |
c906108c | 301 | |
c5aa993b | 302 | DESCRIPTION |
c906108c | 303 | |
07cd4b97 JB |
304 | Free the storage associated with the `struct so_list' object SO. |
305 | If we have opened a BFD for SO, close it. | |
c906108c | 306 | |
07cd4b97 JB |
307 | The caller is responsible for removing SO from whatever list it is |
308 | a member of. If we have placed SO's sections in some target's | |
309 | section table, the caller is responsible for removing them. | |
c906108c | 310 | |
07cd4b97 JB |
311 | This function doesn't mess with objfiles at all. If there is an |
312 | objfile associated with SO that needs to be removed, the caller is | |
313 | responsible for taking care of that. */ | |
314 | ||
13437d4b | 315 | void |
07cd4b97 | 316 | free_so (struct so_list *so) |
c906108c | 317 | { |
07cd4b97 | 318 | char *bfd_filename = 0; |
c5aa993b | 319 | |
07cd4b97 | 320 | if (so->sections) |
b8c9b27d | 321 | xfree (so->sections); |
07cd4b97 JB |
322 | |
323 | if (so->abfd) | |
c906108c | 324 | { |
07cd4b97 JB |
325 | bfd_filename = bfd_get_filename (so->abfd); |
326 | if (! bfd_close (so->abfd)) | |
327 | warning ("cannot close \"%s\": %s", | |
328 | bfd_filename, bfd_errmsg (bfd_get_error ())); | |
c906108c | 329 | } |
07cd4b97 JB |
330 | |
331 | if (bfd_filename) | |
b8c9b27d | 332 | xfree (bfd_filename); |
07cd4b97 | 333 | |
13437d4b | 334 | TARGET_SO_FREE_SO (so); |
07cd4b97 | 335 | |
b8c9b27d | 336 | xfree (so); |
c906108c SS |
337 | } |
338 | ||
07cd4b97 | 339 | |
f8766ec1 KB |
340 | /* Return address of first so_list entry in master shared object list. */ |
341 | struct so_list * | |
342 | master_so_list (void) | |
343 | { | |
344 | return so_list_head; | |
345 | } | |
346 | ||
347 | ||
c906108c SS |
348 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
349 | ||
350 | static int | |
4efb68b1 | 351 | symbol_add_stub (void *arg) |
c906108c | 352 | { |
52f0bd74 | 353 | struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
62557bbc | 354 | struct section_addr_info *sap; |
c906108c | 355 | |
07cd4b97 JB |
356 | /* Have we already loaded this shared object? */ |
357 | ALL_OBJFILES (so->objfile) | |
358 | { | |
359 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
360 | return 1; | |
361 | } | |
362 | ||
62557bbc KB |
363 | sap = build_section_addr_info_from_section_table (so->sections, |
364 | so->sections_end); | |
e7cf9df1 | 365 | |
62557bbc KB |
366 | so->objfile = symbol_file_add (so->so_name, so->from_tty, |
367 | sap, 0, OBJF_SHARED); | |
368 | free_section_addr_info (sap); | |
c906108c | 369 | |
07cd4b97 | 370 | return (1); |
c906108c SS |
371 | } |
372 | ||
c906108c | 373 | |
07cd4b97 | 374 | /* LOCAL FUNCTION |
c906108c | 375 | |
105b175f | 376 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 377 | |
c5aa993b | 378 | SYNOPSIS |
c906108c | 379 | |
105b175f | 380 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 381 | |
07cd4b97 | 382 | Extract the list of currently loaded shared objects from the |
105b175f JB |
383 | inferior, and compare it with the list of shared objects currently |
384 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
385 | with the inferior's new list. | |
c906108c | 386 | |
105b175f JB |
387 | If we notice that the inferior has unloaded some shared objects, |
388 | free any symbolic info GDB had read about those shared objects. | |
389 | ||
390 | Don't load symbolic info for any new shared objects; just add them | |
391 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
392 | |
393 | If FROM_TTY is non-null, feel free to print messages about what | |
394 | we're doing. | |
c906108c | 395 | |
07cd4b97 JB |
396 | If TARGET is non-null, add the sections of all new shared objects |
397 | to TARGET's section table. Note that this doesn't remove any | |
398 | sections for shared objects that have been unloaded, and it | |
399 | doesn't check to see if the new shared objects are already present in | |
400 | the section table. But we only use this for core files and | |
401 | processes we've just attached to, so that's okay. */ | |
c906108c | 402 | |
a78f21af | 403 | static void |
105b175f | 404 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 | 405 | { |
13437d4b | 406 | struct so_list *inferior = TARGET_SO_CURRENT_SOS (); |
07cd4b97 JB |
407 | struct so_list *gdb, **gdb_link; |
408 | ||
104c1213 JM |
409 | /* If we are attaching to a running process for which we |
410 | have not opened a symbol file, we may be able to get its | |
411 | symbols now! */ | |
412 | if (attach_flag && | |
413 | symfile_objfile == NULL) | |
4efb68b1 | 414 | catch_errors (TARGET_SO_OPEN_SYMBOL_FILE_OBJECT, &from_tty, |
104c1213 JM |
415 | "Error reading attached process's symbol file.\n", |
416 | RETURN_MASK_ALL); | |
417 | ||
07cd4b97 JB |
418 | /* Since this function might actually add some elements to the |
419 | so_list_head list, arrange for it to be cleaned up when | |
420 | appropriate. */ | |
421 | if (!solib_cleanup_queued) | |
422 | { | |
423 | make_run_cleanup (do_clear_solib, NULL); | |
424 | solib_cleanup_queued = 1; | |
c906108c | 425 | } |
c5aa993b | 426 | |
07cd4b97 JB |
427 | /* GDB and the inferior's dynamic linker each maintain their own |
428 | list of currently loaded shared objects; we want to bring the | |
429 | former in sync with the latter. Scan both lists, seeing which | |
430 | shared objects appear where. There are three cases: | |
431 | ||
432 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
433 | knows about it already, and it's still loaded in the inferior. |
434 | Nothing needs to happen. | |
07cd4b97 JB |
435 | |
436 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
437 | the inferior has unloaded it. We should remove the shared |
438 | object from GDB's tables. | |
07cd4b97 JB |
439 | |
440 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
441 | means that it's just been loaded. We should add it to GDB's |
442 | tables. | |
07cd4b97 JB |
443 | |
444 | So we walk GDB's list, checking each entry to see if it appears | |
445 | in the inferior's list too. If it does, no action is needed, and | |
446 | we remove it from the inferior's list. If it doesn't, the | |
447 | inferior has unloaded it, and we remove it from GDB's list. By | |
448 | the time we're done walking GDB's list, the inferior's list | |
449 | contains only the new shared objects, which we then add. */ | |
450 | ||
451 | gdb = so_list_head; | |
452 | gdb_link = &so_list_head; | |
453 | while (gdb) | |
c906108c | 454 | { |
07cd4b97 JB |
455 | struct so_list *i = inferior; |
456 | struct so_list **i_link = &inferior; | |
457 | ||
458 | /* Check to see whether the shared object *gdb also appears in | |
459 | the inferior's current list. */ | |
460 | while (i) | |
c906108c | 461 | { |
07cd4b97 JB |
462 | if (! strcmp (gdb->so_original_name, i->so_original_name)) |
463 | break; | |
464 | ||
465 | i_link = &i->next; | |
466 | i = *i_link; | |
c906108c | 467 | } |
c5aa993b | 468 | |
07cd4b97 JB |
469 | /* If the shared object appears on the inferior's list too, then |
470 | it's still loaded, so we don't need to do anything. Delete | |
471 | it from the inferior's list, and leave it on GDB's list. */ | |
472 | if (i) | |
c906108c | 473 | { |
07cd4b97 | 474 | *i_link = i->next; |
07cd4b97 JB |
475 | free_so (i); |
476 | gdb_link = &gdb->next; | |
477 | gdb = *gdb_link; | |
478 | } | |
479 | ||
480 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
481 | else | |
482 | { | |
84acb35a JJ |
483 | /* Notify any observer that the SO has been unloaded |
484 | before we remove it from the gdb tables. */ | |
485 | observer_notify_solib_unloaded (gdb); | |
486 | ||
07cd4b97 | 487 | *gdb_link = gdb->next; |
07cd4b97 JB |
488 | |
489 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 490 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
491 | free_objfile (gdb->objfile); |
492 | ||
493 | /* Some targets' section tables might be referring to | |
494 | sections from so->abfd; remove them. */ | |
495 | remove_target_sections (gdb->abfd); | |
496 | ||
497 | free_so (gdb); | |
498 | gdb = *gdb_link; | |
c906108c SS |
499 | } |
500 | } | |
c5aa993b | 501 | |
07cd4b97 JB |
502 | /* Now the inferior's list contains only shared objects that don't |
503 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 504 | to GDB's shared object list. */ |
07cd4b97 | 505 | if (inferior) |
c906108c | 506 | { |
07cd4b97 JB |
507 | struct so_list *i; |
508 | ||
509 | /* Add the new shared objects to GDB's list. */ | |
510 | *gdb_link = inferior; | |
511 | ||
e8930304 | 512 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 513 | for (i = inferior; i; i = i->next) |
c906108c | 514 | { |
07cd4b97 JB |
515 | i->from_tty = from_tty; |
516 | ||
517 | /* Fill in the rest of the `struct so_list' node. */ | |
518 | catch_errors (solib_map_sections, i, | |
519 | "Error while mapping shared library sections:\n", | |
520 | RETURN_MASK_ALL); | |
07cd4b97 | 521 | |
b41be06e ND |
522 | /* If requested, add the shared object's sections to the TARGET's |
523 | section table. Do this immediately after mapping the object so | |
524 | that later nodes in the list can query this object, as is needed | |
525 | in solib-osf.c. */ | |
526 | if (target) | |
c906108c | 527 | { |
b41be06e ND |
528 | int count = (i->sections_end - i->sections); |
529 | if (count > 0) | |
07cd4b97 | 530 | { |
b41be06e | 531 | int space = target_resize_to_sections (target, count); |
07cd4b97 JB |
532 | memcpy (target->to_sections + space, |
533 | i->sections, | |
534 | count * sizeof (i->sections[0])); | |
07cd4b97 | 535 | } |
c906108c SS |
536 | } |
537 | } | |
e8930304 | 538 | } |
105b175f JB |
539 | } |
540 | ||
541 | ||
542 | /* GLOBAL FUNCTION | |
543 | ||
544 | solib_add -- read in symbol info for newly added shared libraries | |
545 | ||
546 | SYNOPSIS | |
547 | ||
990f9fe3 FF |
548 | void solib_add (char *pattern, int from_tty, struct target_ops |
549 | *TARGET, int readsyms) | |
105b175f JB |
550 | |
551 | DESCRIPTION | |
552 | ||
553 | Read in symbolic information for any shared objects whose names | |
554 | match PATTERN. (If we've already read a shared object's symbol | |
555 | info, leave it alone.) If PATTERN is zero, read them all. | |
556 | ||
990f9fe3 FF |
557 | If READSYMS is 0, defer reading symbolic information until later |
558 | but still do any needed low level processing. | |
559 | ||
105b175f JB |
560 | FROM_TTY and TARGET are as described for update_solib_list, above. */ |
561 | ||
562 | void | |
990f9fe3 | 563 | solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms) |
105b175f JB |
564 | { |
565 | struct so_list *gdb; | |
566 | ||
567 | if (pattern) | |
568 | { | |
569 | char *re_err = re_comp (pattern); | |
570 | ||
571 | if (re_err) | |
572 | error ("Invalid regexp: %s", re_err); | |
573 | } | |
574 | ||
575 | update_solib_list (from_tty, target); | |
c906108c | 576 | |
105b175f JB |
577 | /* Walk the list of currently loaded shared libraries, and read |
578 | symbols for any that match the pattern --- or any whose symbols | |
579 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
580 | { |
581 | int any_matches = 0; | |
582 | int loaded_any_symbols = 0; | |
c906108c | 583 | |
e8930304 JB |
584 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
585 | if (! pattern || re_exec (gdb->so_name)) | |
586 | { | |
587 | any_matches = 1; | |
588 | ||
589 | if (gdb->symbols_loaded) | |
590 | { | |
591 | if (from_tty) | |
592 | printf_unfiltered ("Symbols already loaded for %s\n", | |
593 | gdb->so_name); | |
594 | } | |
990f9fe3 | 595 | else if (readsyms) |
e8930304 JB |
596 | { |
597 | if (catch_errors | |
598 | (symbol_add_stub, gdb, | |
599 | "Error while reading shared library symbols:\n", | |
600 | RETURN_MASK_ALL)) | |
601 | { | |
602 | if (from_tty) | |
603 | printf_unfiltered ("Loaded symbols for %s\n", | |
604 | gdb->so_name); | |
605 | gdb->symbols_loaded = 1; | |
606 | loaded_any_symbols = 1; | |
607 | } | |
608 | } | |
609 | } | |
610 | ||
611 | if (from_tty && pattern && ! any_matches) | |
612 | printf_unfiltered | |
613 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
614 | ||
615 | if (loaded_any_symbols) | |
616 | { | |
617 | /* Getting new symbols may change our opinion about what is | |
618 | frameless. */ | |
619 | reinit_frame_cache (); | |
620 | ||
13437d4b | 621 | TARGET_SO_SPECIAL_SYMBOL_HANDLING (); |
e8930304 JB |
622 | } |
623 | } | |
c906108c SS |
624 | } |
625 | ||
07cd4b97 | 626 | |
c906108c SS |
627 | /* |
628 | ||
c5aa993b | 629 | LOCAL FUNCTION |
c906108c | 630 | |
c5aa993b | 631 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 632 | |
c5aa993b | 633 | SYNOPSIS |
c906108c | 634 | |
c5aa993b | 635 | static void info_sharedlibrary_command () |
c906108c | 636 | |
c5aa993b | 637 | DESCRIPTION |
c906108c | 638 | |
c5aa993b JM |
639 | Walk through the shared library list and print information |
640 | about each attached library. | |
641 | */ | |
c906108c SS |
642 | |
643 | static void | |
fba45db2 | 644 | info_sharedlibrary_command (char *ignore, int from_tty) |
c906108c | 645 | { |
52f0bd74 | 646 | struct so_list *so = NULL; /* link map state variable */ |
c906108c SS |
647 | int header_done = 0; |
648 | int addr_width; | |
c906108c | 649 | |
c7cccb76 | 650 | if (TARGET_PTR_BIT == 32) |
bb599908 | 651 | addr_width = 8 + 4; |
c7cccb76 | 652 | else if (TARGET_PTR_BIT == 64) |
bb599908 | 653 | addr_width = 16 + 4; |
7f7e9482 AC |
654 | else |
655 | { | |
8e65ff28 | 656 | internal_error (__FILE__, __LINE__, |
c7cccb76 MS |
657 | "TARGET_PTR_BIT returned unknown size %d", |
658 | TARGET_PTR_BIT); | |
7f7e9482 | 659 | } |
c906108c | 660 | |
105b175f | 661 | update_solib_list (from_tty, 0); |
07cd4b97 JB |
662 | |
663 | for (so = so_list_head; so; so = so->next) | |
c906108c | 664 | { |
c5aa993b | 665 | if (so->so_name[0]) |
c906108c SS |
666 | { |
667 | if (!header_done) | |
668 | { | |
c5aa993b JM |
669 | printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
670 | addr_width, "To", "Syms Read", | |
671 | "Shared Object Library"); | |
c906108c SS |
672 | header_done++; |
673 | } | |
674 | ||
675 | printf_unfiltered ("%-*s", addr_width, | |
749499cb | 676 | so->textsection != NULL |
bb599908 | 677 | ? hex_string_custom ( |
a43ad351 | 678 | (LONGEST) so->textsection->addr, |
bb599908 | 679 | addr_width - 4) |
749499cb | 680 | : ""); |
c906108c | 681 | printf_unfiltered ("%-*s", addr_width, |
749499cb | 682 | so->textsection != NULL |
bb599908 | 683 | ? hex_string_custom ( |
a43ad351 | 684 | (LONGEST) so->textsection->endaddr, |
bb599908 | 685 | addr_width - 4) |
749499cb | 686 | : ""); |
c5aa993b JM |
687 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); |
688 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
689 | } |
690 | } | |
691 | if (so_list_head == NULL) | |
692 | { | |
c5aa993b | 693 | printf_unfiltered ("No shared libraries loaded at this time.\n"); |
c906108c SS |
694 | } |
695 | } | |
696 | ||
697 | /* | |
698 | ||
c5aa993b | 699 | GLOBAL FUNCTION |
c906108c | 700 | |
c5aa993b | 701 | solib_address -- check to see if an address is in a shared lib |
c906108c | 702 | |
c5aa993b | 703 | SYNOPSIS |
c906108c | 704 | |
c5aa993b | 705 | char * solib_address (CORE_ADDR address) |
c906108c | 706 | |
c5aa993b | 707 | DESCRIPTION |
c906108c | 708 | |
c5aa993b JM |
709 | Provides a hook for other gdb routines to discover whether or |
710 | not a particular address is within the mapped address space of | |
749499cb | 711 | a shared library. |
c906108c | 712 | |
c5aa993b JM |
713 | For example, this routine is called at one point to disable |
714 | breakpoints which are in shared libraries that are not currently | |
715 | mapped in. | |
c906108c SS |
716 | */ |
717 | ||
718 | char * | |
fba45db2 | 719 | solib_address (CORE_ADDR address) |
c906108c | 720 | { |
52f0bd74 | 721 | struct so_list *so = 0; /* link map state variable */ |
c5aa993b | 722 | |
07cd4b97 | 723 | for (so = so_list_head; so; so = so->next) |
c906108c | 724 | { |
749499cb KB |
725 | struct section_table *p; |
726 | ||
727 | for (p = so->sections; p < so->sections_end; p++) | |
728 | { | |
729 | if (p->addr <= address && address < p->endaddr) | |
730 | return (so->so_name); | |
731 | } | |
c906108c | 732 | } |
07cd4b97 | 733 | |
c906108c SS |
734 | return (0); |
735 | } | |
736 | ||
737 | /* Called by free_all_symtabs */ | |
738 | ||
c5aa993b | 739 | void |
fba45db2 | 740 | clear_solib (void) |
c906108c | 741 | { |
085dd6e6 JM |
742 | /* This function is expected to handle ELF shared libraries. It is |
743 | also used on Solaris, which can run either ELF or a.out binaries | |
744 | (for compatibility with SunOS 4), both of which can use shared | |
745 | libraries. So we don't know whether we have an ELF executable or | |
746 | an a.out executable until the user chooses an executable file. | |
747 | ||
748 | ELF shared libraries don't get mapped into the address space | |
749 | until after the program starts, so we'd better not try to insert | |
750 | breakpoints in them immediately. We have to wait until the | |
751 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
752 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
753 | it's ready. | |
754 | ||
755 | SunOS shared libraries seem to be different --- they're present | |
756 | as soon as the process begins execution, so there's no need to | |
757 | put off inserting breakpoints. There's also nowhere to put a | |
758 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
759 | around to it. | |
760 | ||
761 | So: disable breakpoints only if we're using ELF shared libs. */ | |
762 | if (exec_bfd != NULL | |
763 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
764 | disable_breakpoints_in_shlibs (1); | |
765 | ||
c906108c SS |
766 | while (so_list_head) |
767 | { | |
07cd4b97 JB |
768 | struct so_list *so = so_list_head; |
769 | so_list_head = so->next; | |
2069d78d KB |
770 | if (so->abfd) |
771 | remove_target_sections (so->abfd); | |
07cd4b97 | 772 | free_so (so); |
c906108c | 773 | } |
07cd4b97 | 774 | |
13437d4b | 775 | TARGET_SO_CLEAR_SOLIB (); |
c906108c SS |
776 | } |
777 | ||
778 | static void | |
4efb68b1 | 779 | do_clear_solib (void *dummy) |
c906108c SS |
780 | { |
781 | solib_cleanup_queued = 0; | |
782 | clear_solib (); | |
783 | } | |
784 | ||
13437d4b | 785 | /* GLOBAL FUNCTION |
c5aa993b JM |
786 | |
787 | solib_create_inferior_hook -- shared library startup support | |
788 | ||
789 | SYNOPSIS | |
790 | ||
791 | void solib_create_inferior_hook() | |
792 | ||
793 | DESCRIPTION | |
794 | ||
795 | When gdb starts up the inferior, it nurses it along (through the | |
796 | shell) until it is ready to execute it's first instruction. At this | |
797 | point, this function gets called via expansion of the macro | |
13437d4b | 798 | SOLIB_CREATE_INFERIOR_HOOK. */ |
c5aa993b JM |
799 | |
800 | void | |
fba45db2 | 801 | solib_create_inferior_hook (void) |
c906108c | 802 | { |
13437d4b | 803 | TARGET_SO_SOLIB_CREATE_INFERIOR_HOOK (); |
c906108c SS |
804 | } |
805 | ||
d7fa2ae2 KB |
806 | /* GLOBAL FUNCTION |
807 | ||
808 | in_solib_dynsym_resolve_code -- check to see if an address is in | |
809 | dynamic loader's dynamic symbol | |
810 | resolution code | |
811 | ||
812 | SYNOPSIS | |
813 | ||
814 | int in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
815 | ||
816 | DESCRIPTION | |
817 | ||
818 | Determine if PC is in the dynamic linker's symbol resolution | |
819 | code. Return 1 if so, 0 otherwise. | |
820 | */ | |
821 | ||
822 | int | |
823 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
824 | { | |
825 | return TARGET_SO_IN_DYNSYM_RESOLVE_CODE (pc); | |
826 | } | |
c906108c SS |
827 | |
828 | /* | |
829 | ||
c5aa993b | 830 | LOCAL FUNCTION |
c906108c | 831 | |
c5aa993b | 832 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 833 | |
c5aa993b | 834 | SYNOPSIS |
c906108c | 835 | |
c5aa993b | 836 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 837 | |
c5aa993b | 838 | DESCRIPTION |
c906108c | 839 | |
c5aa993b | 840 | */ |
c906108c SS |
841 | |
842 | static void | |
fba45db2 | 843 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
844 | { |
845 | dont_repeat (); | |
990f9fe3 | 846 | solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
847 | } |
848 | ||
cb0ba49e MS |
849 | /* LOCAL FUNCTION |
850 | ||
851 | no_shared_libraries -- handle command to explicitly discard symbols | |
852 | from shared libraries. | |
853 | ||
854 | DESCRIPTION | |
855 | ||
856 | Implements the command "nosharedlibrary", which discards symbols | |
857 | that have been auto-loaded from shared libraries. Symbols from | |
858 | shared libraries that were added by explicit request of the user | |
859 | are not discarded. Also called from remote.c. */ | |
860 | ||
c60a7562 MS |
861 | void |
862 | no_shared_libraries (char *ignored, int from_tty) | |
863 | { | |
864 | objfile_purge_solibs (); | |
865 | do_clear_solib (NULL); | |
866 | } | |
c906108c | 867 | |
cf466558 KB |
868 | static void |
869 | reload_shared_libraries (char *ignored, int from_tty) | |
870 | { | |
871 | no_shared_libraries (NULL, from_tty); | |
872 | solib_add (NULL, from_tty, NULL, auto_solib_add); | |
873 | } | |
874 | ||
a78f21af AC |
875 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
876 | ||
c906108c | 877 | void |
fba45db2 | 878 | _initialize_solib (void) |
c906108c | 879 | { |
fa58ee11 EZ |
880 | struct cmd_list_element *c; |
881 | ||
c906108c SS |
882 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
883 | "Load shared object library symbols for files matching REGEXP."); | |
c5aa993b | 884 | add_info ("sharedlibrary", info_sharedlibrary_command, |
c906108c | 885 | "Status of loaded shared object libraries."); |
c60a7562 | 886 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
e89a4777 | 887 | "Unload all shared object library symbols."); |
c906108c | 888 | |
cb1a6d5f | 889 | deprecated_add_show_from_set |
b7209cb4 | 890 | (add_set_cmd ("auto-solib-add", class_support, var_boolean, |
c906108c SS |
891 | (char *) &auto_solib_add, |
892 | "Set autoloading of shared library symbols.\n\ | |
b7209cb4 FF |
893 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
894 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
895 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
896 | inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'.", | |
c906108c SS |
897 | &setlist), |
898 | &showlist); | |
899 | ||
fa58ee11 EZ |
900 | c = add_set_cmd ("solib-absolute-prefix", class_support, var_filename, |
901 | (char *) &solib_absolute_prefix, | |
902 | "Set prefix for loading absolute shared library symbol files.\n\ | |
c906108c | 903 | For other (relative) files, you can add values using `set solib-search-path'.", |
fa58ee11 | 904 | &setlist); |
cb1a6d5f | 905 | deprecated_add_show_from_set (c, &showlist); |
cf466558 | 906 | set_cmd_cfunc (c, reload_shared_libraries); |
5ba2abeb | 907 | set_cmd_completer (c, filename_completer); |
c906108c | 908 | |
030292b7 DJ |
909 | /* Set the default value of "solib-absolute-prefix" from the sysroot, if |
910 | one is set. */ | |
911 | solib_absolute_prefix = xstrdup (gdb_sysroot); | |
912 | ||
fa58ee11 EZ |
913 | c = add_set_cmd ("solib-search-path", class_support, var_string, |
914 | (char *) &solib_search_path, | |
915 | "Set the search path for loading non-absolute shared library symbol files.\n\ | |
916 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH.", | |
917 | &setlist); | |
cb1a6d5f | 918 | deprecated_add_show_from_set (c, &showlist); |
cf466558 | 919 | set_cmd_cfunc (c, reload_shared_libraries); |
5ba2abeb | 920 | set_cmd_completer (c, filename_completer); |
c906108c | 921 | } |