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, | |
42a6e6a0 MK |
4 | 1999, 2000, 2001, 2002, 2003, 2005 |
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 | |
11 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c | 23 | |
c906108c SS |
24 | #include "defs.h" |
25 | ||
c906108c | 26 | #include <sys/types.h> |
c906108c | 27 | #include <fcntl.h> |
13437d4b | 28 | #include "gdb_string.h" |
c906108c SS |
29 | #include "symtab.h" |
30 | #include "bfd.h" | |
31 | #include "symfile.h" | |
32 | #include "objfiles.h" | |
60250e8b | 33 | #include "exceptions.h" |
c906108c SS |
34 | #include "gdbcore.h" |
35 | #include "command.h" | |
36 | #include "target.h" | |
37 | #include "frame.h" | |
88987551 | 38 | #include "gdb_regex.h" |
c906108c SS |
39 | #include "inferior.h" |
40 | #include "environ.h" | |
41 | #include "language.h" | |
42 | #include "gdbcmd.h" | |
fa58ee11 | 43 | #include "completer.h" |
fe4e3eb8 | 44 | #include "filenames.h" /* for DOSish file names */ |
4646aa9d | 45 | #include "exec.h" |
13437d4b | 46 | #include "solist.h" |
84acb35a | 47 | #include "observer.h" |
dbda9972 | 48 | #include "readline/readline.h" |
c906108c | 49 | |
13437d4b | 50 | /* external data declarations */ |
c906108c | 51 | |
13437d4b KB |
52 | /* FIXME: gdbarch needs to control this variable */ |
53 | struct target_so_ops *current_target_so_ops; | |
23e04971 MS |
54 | |
55 | /* local data declarations */ | |
07cd4b97 | 56 | |
c906108c | 57 | static struct so_list *so_list_head; /* List of known shared objects */ |
23e04971 | 58 | |
c5aa993b | 59 | static int solib_cleanup_queued = 0; /* make_run_cleanup called */ |
c906108c | 60 | |
c906108c SS |
61 | /* Local function prototypes */ |
62 | ||
4efb68b1 | 63 | static void do_clear_solib (void *); |
c906108c | 64 | |
c906108c SS |
65 | /* If non-zero, this is a prefix that will be added to the front of the name |
66 | shared libraries with an absolute filename for loading. */ | |
67 | static char *solib_absolute_prefix = NULL; | |
68 | ||
69 | /* If non-empty, this is a search path for loading non-absolute shared library | |
70 | symbol files. This takes precedence over the environment variables PATH | |
71 | and LD_LIBRARY_PATH. */ | |
72 | static char *solib_search_path = NULL; | |
73 | ||
e4f7b8c8 MS |
74 | /* |
75 | ||
76 | GLOBAL FUNCTION | |
77 | ||
78 | solib_open -- Find a shared library file and open it. | |
79 | ||
80 | SYNOPSIS | |
81 | ||
82 | int solib_open (char *in_patname, char **found_pathname); | |
83 | ||
84 | DESCRIPTION | |
85 | ||
86 | Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory | |
87 | to search for shared libraries if they have an absolute path. | |
88 | ||
89 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
90 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
91 | shared libraries if not found in SOLIB_ABSOLUTE_PREFIX. | |
92 | ||
c8c18e65 KW |
93 | Search algorithm: |
94 | * If there is a solib_absolute_prefix and path is absolute: | |
95 | * Search for solib_absolute_prefix/path. | |
96 | * else | |
97 | * Look for it literally (unmodified). | |
e4f7b8c8 | 98 | * Look in SOLIB_SEARCH_PATH. |
f43caff8 | 99 | * If available, use target defined search function. |
c8c18e65 KW |
100 | * If solib_absolute_prefix is NOT set, perform the following two searches: |
101 | * Look in inferior's $PATH. | |
102 | * Look in inferior's $LD_LIBRARY_PATH. | |
103 | * | |
104 | * The last check avoids doing this search when targetting remote | |
105 | * machines since solib_absolute_prefix will almost always be set. | |
e4f7b8c8 MS |
106 | |
107 | RETURNS | |
b21f0843 | 108 | |
e4f7b8c8 MS |
109 | file handle for opened solib, or -1 for failure. */ |
110 | ||
111 | int | |
112 | solib_open (char *in_pathname, char **found_pathname) | |
113 | { | |
114 | int found_file = -1; | |
115 | char *temp_pathname = NULL; | |
fe4e3eb8 | 116 | char *p = in_pathname; |
e4f7b8c8 | 117 | |
fe4e3eb8 EZ |
118 | while (*p && !IS_DIR_SEPARATOR (*p)) |
119 | p++; | |
120 | ||
121 | if (*p) | |
e4f7b8c8 | 122 | { |
fe4e3eb8 | 123 | if (! IS_ABSOLUTE_PATH (in_pathname) || solib_absolute_prefix == NULL) |
a7ec76fe KB |
124 | temp_pathname = in_pathname; |
125 | else | |
126 | { | |
b21f0843 | 127 | int prefix_len = strlen (solib_absolute_prefix); |
a7ec76fe KB |
128 | |
129 | /* Remove trailing slashes from absolute prefix. */ | |
b21f0843 | 130 | while (prefix_len > 0 |
fe4e3eb8 | 131 | && IS_DIR_SEPARATOR (solib_absolute_prefix[prefix_len - 1])) |
a7ec76fe KB |
132 | prefix_len--; |
133 | ||
134 | /* Cat the prefixed pathname together. */ | |
135 | temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1); | |
136 | strncpy (temp_pathname, solib_absolute_prefix, prefix_len); | |
137 | temp_pathname[prefix_len] = '\0'; | |
138 | strcat (temp_pathname, in_pathname); | |
a7ec76fe | 139 | } |
b21f0843 | 140 | |
e4f7b8c8 MS |
141 | /* Now see if we can open it. */ |
142 | found_file = open (temp_pathname, O_RDONLY, 0); | |
143 | } | |
144 | ||
ba5f0d88 OF |
145 | /* If the search in solib_absolute_prefix failed, and the path name is |
146 | absolute at this point, make it relative. (openp will try and open the | |
147 | file according to its absolute path otherwise, which is not what we want.) | |
148 | Affects subsequent searches for this solib. */ | |
149 | if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname)) | |
150 | { | |
151 | /* First, get rid of any drive letters etc. */ | |
152 | while (!IS_DIR_SEPARATOR (*in_pathname)) | |
153 | in_pathname++; | |
154 | ||
155 | /* Next, get rid of all leading dir separators. */ | |
156 | while (IS_DIR_SEPARATOR (*in_pathname)) | |
157 | in_pathname++; | |
158 | } | |
159 | ||
c8c18e65 | 160 | /* If not found, search the solib_search_path (if any). */ |
e4f7b8c8 | 161 | if (found_file < 0 && solib_search_path != NULL) |
014d698b EZ |
162 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
163 | in_pathname, O_RDONLY, 0, &temp_pathname); | |
ba5f0d88 OF |
164 | |
165 | /* If not found, next search the solib_search_path (if any) for the basename | |
166 | only (ignoring the path). This is to allow reading solibs from a path | |
167 | that differs from the opened path. */ | |
168 | if (found_file < 0 && solib_search_path != NULL) | |
014d698b EZ |
169 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
170 | lbasename (in_pathname), O_RDONLY, 0, | |
ba5f0d88 | 171 | &temp_pathname); |
e4f7b8c8 | 172 | |
2610b0bf KW |
173 | /* If not found, try to use target supplied solib search method */ |
174 | if (found_file < 0 && TARGET_SO_FIND_AND_OPEN_SOLIB != NULL) | |
175 | found_file = TARGET_SO_FIND_AND_OPEN_SOLIB | |
176 | (in_pathname, O_RDONLY, &temp_pathname); | |
177 | ||
e4f7b8c8 | 178 | /* If not found, next search the inferior's $PATH environment variable. */ |
c8c18e65 | 179 | if (found_file < 0 && solib_absolute_prefix == NULL) |
e4f7b8c8 | 180 | found_file = openp (get_in_environ (inferior_environ, "PATH"), |
014d698b EZ |
181 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY, 0, |
182 | &temp_pathname); | |
e4f7b8c8 MS |
183 | |
184 | /* If not found, next search the inferior's $LD_LIBRARY_PATH | |
185 | environment variable. */ | |
c8c18e65 | 186 | if (found_file < 0 && solib_absolute_prefix == NULL) |
e4f7b8c8 | 187 | found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"), |
014d698b EZ |
188 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY, 0, |
189 | &temp_pathname); | |
e4f7b8c8 MS |
190 | |
191 | /* Done. If not found, tough luck. Return found_file and | |
192 | (optionally) found_pathname. */ | |
a7ec76fe | 193 | if (found_pathname != NULL && temp_pathname != NULL) |
4fcf66da | 194 | *found_pathname = xstrdup (temp_pathname); |
e4f7b8c8 MS |
195 | return found_file; |
196 | } | |
197 | ||
198 | ||
c906108c SS |
199 | /* |
200 | ||
c5aa993b | 201 | LOCAL FUNCTION |
c906108c | 202 | |
c5aa993b | 203 | solib_map_sections -- open bfd and build sections for shared lib |
c906108c | 204 | |
c5aa993b | 205 | SYNOPSIS |
c906108c | 206 | |
c5aa993b | 207 | static int solib_map_sections (struct so_list *so) |
c906108c | 208 | |
c5aa993b | 209 | DESCRIPTION |
c906108c | 210 | |
c5aa993b JM |
211 | Given a pointer to one of the shared objects in our list |
212 | of mapped objects, use the recorded name to open a bfd | |
213 | descriptor for the object, build a section table, and then | |
214 | relocate all the section addresses by the base address at | |
215 | which the shared object was mapped. | |
c906108c | 216 | |
c5aa993b | 217 | FIXMES |
c906108c | 218 | |
c5aa993b JM |
219 | In most (all?) cases the shared object file name recorded in the |
220 | dynamic linkage tables will be a fully qualified pathname. For | |
221 | cases where it isn't, do we really mimic the systems search | |
222 | mechanism correctly in the below code (particularly the tilde | |
223 | expansion stuff?). | |
c906108c SS |
224 | */ |
225 | ||
226 | static int | |
4efb68b1 | 227 | solib_map_sections (void *arg) |
c906108c SS |
228 | { |
229 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
230 | char *filename; | |
231 | char *scratch_pathname; | |
232 | int scratch_chan; | |
233 | struct section_table *p; | |
234 | struct cleanup *old_chain; | |
235 | bfd *abfd; | |
c5aa993b JM |
236 | |
237 | filename = tilde_expand (so->so_name); | |
238 | ||
b8c9b27d | 239 | old_chain = make_cleanup (xfree, filename); |
e4f7b8c8 | 240 | scratch_chan = solib_open (filename, &scratch_pathname); |
c906108c | 241 | |
c906108c SS |
242 | if (scratch_chan < 0) |
243 | { | |
13437d4b KB |
244 | perror_with_name (filename); |
245 | } | |
104c1213 | 246 | |
e4f7b8c8 | 247 | /* Leave scratch_pathname allocated. abfd->name will point to it. */ |
13437d4b KB |
248 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); |
249 | if (!abfd) | |
23e04971 | 250 | { |
13437d4b KB |
251 | close (scratch_chan); |
252 | error ("Could not open `%s' as an executable file: %s", | |
253 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
254 | } | |
e4f7b8c8 | 255 | |
13437d4b KB |
256 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
257 | so->abfd = abfd; | |
549c1eea | 258 | bfd_set_cacheable (abfd, 1); |
23e04971 | 259 | |
e4f7b8c8 MS |
260 | /* copy full path name into so_name, so that later symbol_file_add |
261 | can find it */ | |
13437d4b KB |
262 | if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE) |
263 | error ("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure."); | |
264 | strcpy (so->so_name, scratch_pathname); | |
23e04971 | 265 | |
13437d4b KB |
266 | if (!bfd_check_format (abfd, bfd_object)) |
267 | { | |
268 | error ("\"%s\": not in executable format: %s.", | |
269 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
23e04971 | 270 | } |
13437d4b | 271 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
23e04971 | 272 | { |
13437d4b KB |
273 | error ("Can't find the file sections in `%s': %s", |
274 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); | |
23e04971 | 275 | } |
104c1213 | 276 | |
13437d4b | 277 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 278 | { |
13437d4b KB |
279 | /* Relocate the section binding addresses as recorded in the shared |
280 | object's file by the base address to which the object was actually | |
281 | mapped. */ | |
749499cb | 282 | TARGET_SO_RELOCATE_SECTION_ADDRESSES (so, p); |
6314a349 | 283 | if (strcmp (p->the_bfd_section->name, ".text") == 0) |
13437d4b KB |
284 | { |
285 | so->textsection = p; | |
286 | } | |
104c1213 JM |
287 | } |
288 | ||
13437d4b KB |
289 | /* Free the file names, close the file now. */ |
290 | do_cleanups (old_chain); | |
104c1213 | 291 | |
13437d4b | 292 | return (1); |
104c1213 | 293 | } |
c906108c | 294 | |
07cd4b97 | 295 | /* LOCAL FUNCTION |
c906108c | 296 | |
07cd4b97 | 297 | free_so --- free a `struct so_list' object |
c906108c | 298 | |
c5aa993b | 299 | SYNOPSIS |
c906108c | 300 | |
07cd4b97 | 301 | void free_so (struct so_list *so) |
c906108c | 302 | |
c5aa993b | 303 | DESCRIPTION |
c906108c | 304 | |
07cd4b97 JB |
305 | Free the storage associated with the `struct so_list' object SO. |
306 | If we have opened a BFD for SO, close it. | |
c906108c | 307 | |
07cd4b97 JB |
308 | The caller is responsible for removing SO from whatever list it is |
309 | a member of. If we have placed SO's sections in some target's | |
310 | section table, the caller is responsible for removing them. | |
c906108c | 311 | |
07cd4b97 JB |
312 | This function doesn't mess with objfiles at all. If there is an |
313 | objfile associated with SO that needs to be removed, the caller is | |
314 | responsible for taking care of that. */ | |
315 | ||
13437d4b | 316 | void |
07cd4b97 | 317 | free_so (struct so_list *so) |
c906108c | 318 | { |
07cd4b97 | 319 | char *bfd_filename = 0; |
c5aa993b | 320 | |
07cd4b97 | 321 | if (so->sections) |
b8c9b27d | 322 | xfree (so->sections); |
07cd4b97 JB |
323 | |
324 | if (so->abfd) | |
c906108c | 325 | { |
07cd4b97 JB |
326 | bfd_filename = bfd_get_filename (so->abfd); |
327 | if (! bfd_close (so->abfd)) | |
328 | warning ("cannot close \"%s\": %s", | |
329 | bfd_filename, bfd_errmsg (bfd_get_error ())); | |
c906108c | 330 | } |
07cd4b97 JB |
331 | |
332 | if (bfd_filename) | |
b8c9b27d | 333 | xfree (bfd_filename); |
07cd4b97 | 334 | |
13437d4b | 335 | TARGET_SO_FREE_SO (so); |
07cd4b97 | 336 | |
b8c9b27d | 337 | xfree (so); |
c906108c SS |
338 | } |
339 | ||
07cd4b97 | 340 | |
f8766ec1 KB |
341 | /* Return address of first so_list entry in master shared object list. */ |
342 | struct so_list * | |
343 | master_so_list (void) | |
344 | { | |
345 | return so_list_head; | |
346 | } | |
347 | ||
348 | ||
c906108c SS |
349 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
350 | ||
351 | static int | |
4efb68b1 | 352 | symbol_add_stub (void *arg) |
c906108c | 353 | { |
52f0bd74 | 354 | struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
62557bbc | 355 | struct section_addr_info *sap; |
c906108c | 356 | |
07cd4b97 JB |
357 | /* Have we already loaded this shared object? */ |
358 | ALL_OBJFILES (so->objfile) | |
359 | { | |
360 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
361 | return 1; | |
362 | } | |
363 | ||
62557bbc KB |
364 | sap = build_section_addr_info_from_section_table (so->sections, |
365 | so->sections_end); | |
e7cf9df1 | 366 | |
62557bbc KB |
367 | so->objfile = symbol_file_add (so->so_name, so->from_tty, |
368 | sap, 0, OBJF_SHARED); | |
369 | free_section_addr_info (sap); | |
c906108c | 370 | |
07cd4b97 | 371 | return (1); |
c906108c SS |
372 | } |
373 | ||
42a6e6a0 MK |
374 | /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be |
375 | chatty about it. Return non-zero if any symbols were actually | |
376 | loaded. */ | |
377 | ||
378 | int | |
379 | solib_read_symbols (struct so_list *so, int from_tty) | |
380 | { | |
381 | if (so->symbols_loaded) | |
382 | { | |
383 | if (from_tty) | |
384 | printf_unfiltered ("Symbols already loaded for %s\n", so->so_name); | |
385 | } | |
386 | else | |
387 | { | |
388 | if (catch_errors (symbol_add_stub, so, | |
389 | "Error while reading shared library symbols:\n", | |
390 | RETURN_MASK_ALL)) | |
391 | { | |
392 | if (from_tty) | |
393 | printf_unfiltered ("Loaded symbols for %s\n", so->so_name); | |
394 | so->symbols_loaded = 1; | |
395 | return 1; | |
396 | } | |
397 | } | |
398 | ||
399 | return 0; | |
400 | } | |
c906108c | 401 | |
07cd4b97 | 402 | /* LOCAL FUNCTION |
c906108c | 403 | |
105b175f | 404 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 405 | |
c5aa993b | 406 | SYNOPSIS |
c906108c | 407 | |
105b175f | 408 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 409 | |
07cd4b97 | 410 | Extract the list of currently loaded shared objects from the |
105b175f JB |
411 | inferior, and compare it with the list of shared objects currently |
412 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
413 | with the inferior's new list. | |
c906108c | 414 | |
105b175f JB |
415 | If we notice that the inferior has unloaded some shared objects, |
416 | free any symbolic info GDB had read about those shared objects. | |
417 | ||
418 | Don't load symbolic info for any new shared objects; just add them | |
419 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
420 | |
421 | If FROM_TTY is non-null, feel free to print messages about what | |
422 | we're doing. | |
c906108c | 423 | |
07cd4b97 JB |
424 | If TARGET is non-null, add the sections of all new shared objects |
425 | to TARGET's section table. Note that this doesn't remove any | |
426 | sections for shared objects that have been unloaded, and it | |
427 | doesn't check to see if the new shared objects are already present in | |
428 | the section table. But we only use this for core files and | |
429 | processes we've just attached to, so that's okay. */ | |
c906108c | 430 | |
a78f21af | 431 | static void |
105b175f | 432 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 | 433 | { |
13437d4b | 434 | struct so_list *inferior = TARGET_SO_CURRENT_SOS (); |
07cd4b97 JB |
435 | struct so_list *gdb, **gdb_link; |
436 | ||
104c1213 JM |
437 | /* If we are attaching to a running process for which we |
438 | have not opened a symbol file, we may be able to get its | |
439 | symbols now! */ | |
440 | if (attach_flag && | |
441 | symfile_objfile == NULL) | |
4efb68b1 | 442 | catch_errors (TARGET_SO_OPEN_SYMBOL_FILE_OBJECT, &from_tty, |
104c1213 JM |
443 | "Error reading attached process's symbol file.\n", |
444 | RETURN_MASK_ALL); | |
445 | ||
07cd4b97 JB |
446 | /* Since this function might actually add some elements to the |
447 | so_list_head list, arrange for it to be cleaned up when | |
448 | appropriate. */ | |
449 | if (!solib_cleanup_queued) | |
450 | { | |
451 | make_run_cleanup (do_clear_solib, NULL); | |
452 | solib_cleanup_queued = 1; | |
c906108c | 453 | } |
c5aa993b | 454 | |
07cd4b97 JB |
455 | /* GDB and the inferior's dynamic linker each maintain their own |
456 | list of currently loaded shared objects; we want to bring the | |
457 | former in sync with the latter. Scan both lists, seeing which | |
458 | shared objects appear where. There are three cases: | |
459 | ||
460 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
461 | knows about it already, and it's still loaded in the inferior. |
462 | Nothing needs to happen. | |
07cd4b97 JB |
463 | |
464 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
465 | the inferior has unloaded it. We should remove the shared |
466 | object from GDB's tables. | |
07cd4b97 JB |
467 | |
468 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
469 | means that it's just been loaded. We should add it to GDB's |
470 | tables. | |
07cd4b97 JB |
471 | |
472 | So we walk GDB's list, checking each entry to see if it appears | |
473 | in the inferior's list too. If it does, no action is needed, and | |
474 | we remove it from the inferior's list. If it doesn't, the | |
475 | inferior has unloaded it, and we remove it from GDB's list. By | |
476 | the time we're done walking GDB's list, the inferior's list | |
477 | contains only the new shared objects, which we then add. */ | |
478 | ||
479 | gdb = so_list_head; | |
480 | gdb_link = &so_list_head; | |
481 | while (gdb) | |
c906108c | 482 | { |
07cd4b97 JB |
483 | struct so_list *i = inferior; |
484 | struct so_list **i_link = &inferior; | |
485 | ||
486 | /* Check to see whether the shared object *gdb also appears in | |
487 | the inferior's current list. */ | |
488 | while (i) | |
c906108c | 489 | { |
07cd4b97 JB |
490 | if (! strcmp (gdb->so_original_name, i->so_original_name)) |
491 | break; | |
492 | ||
493 | i_link = &i->next; | |
494 | i = *i_link; | |
c906108c | 495 | } |
c5aa993b | 496 | |
07cd4b97 JB |
497 | /* If the shared object appears on the inferior's list too, then |
498 | it's still loaded, so we don't need to do anything. Delete | |
499 | it from the inferior's list, and leave it on GDB's list. */ | |
500 | if (i) | |
c906108c | 501 | { |
07cd4b97 | 502 | *i_link = i->next; |
07cd4b97 JB |
503 | free_so (i); |
504 | gdb_link = &gdb->next; | |
505 | gdb = *gdb_link; | |
506 | } | |
507 | ||
508 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
509 | else | |
510 | { | |
42a6e6a0 MK |
511 | /* Notify any observer that the shared object has been |
512 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
513 | observer_notify_solib_unloaded (gdb); |
514 | ||
07cd4b97 | 515 | *gdb_link = gdb->next; |
07cd4b97 JB |
516 | |
517 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 518 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
519 | free_objfile (gdb->objfile); |
520 | ||
521 | /* Some targets' section tables might be referring to | |
522 | sections from so->abfd; remove them. */ | |
523 | remove_target_sections (gdb->abfd); | |
524 | ||
525 | free_so (gdb); | |
526 | gdb = *gdb_link; | |
c906108c SS |
527 | } |
528 | } | |
c5aa993b | 529 | |
07cd4b97 JB |
530 | /* Now the inferior's list contains only shared objects that don't |
531 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 532 | to GDB's shared object list. */ |
07cd4b97 | 533 | if (inferior) |
c906108c | 534 | { |
07cd4b97 JB |
535 | struct so_list *i; |
536 | ||
537 | /* Add the new shared objects to GDB's list. */ | |
538 | *gdb_link = inferior; | |
539 | ||
e8930304 | 540 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 541 | for (i = inferior; i; i = i->next) |
c906108c | 542 | { |
07cd4b97 JB |
543 | i->from_tty = from_tty; |
544 | ||
545 | /* Fill in the rest of the `struct so_list' node. */ | |
546 | catch_errors (solib_map_sections, i, | |
547 | "Error while mapping shared library sections:\n", | |
548 | RETURN_MASK_ALL); | |
07cd4b97 | 549 | |
b41be06e ND |
550 | /* If requested, add the shared object's sections to the TARGET's |
551 | section table. Do this immediately after mapping the object so | |
552 | that later nodes in the list can query this object, as is needed | |
553 | in solib-osf.c. */ | |
554 | if (target) | |
c906108c | 555 | { |
b41be06e ND |
556 | int count = (i->sections_end - i->sections); |
557 | if (count > 0) | |
07cd4b97 | 558 | { |
b41be06e | 559 | int space = target_resize_to_sections (target, count); |
07cd4b97 JB |
560 | memcpy (target->to_sections + space, |
561 | i->sections, | |
562 | count * sizeof (i->sections[0])); | |
07cd4b97 | 563 | } |
c906108c | 564 | } |
42a6e6a0 MK |
565 | |
566 | /* Notify any observer that the shared object has been | |
567 | loaded now that we've added it to GDB's tables. */ | |
568 | observer_notify_solib_loaded (i); | |
c906108c | 569 | } |
e8930304 | 570 | } |
105b175f JB |
571 | } |
572 | ||
573 | ||
574 | /* GLOBAL FUNCTION | |
575 | ||
576 | solib_add -- read in symbol info for newly added shared libraries | |
577 | ||
578 | SYNOPSIS | |
579 | ||
990f9fe3 FF |
580 | void solib_add (char *pattern, int from_tty, struct target_ops |
581 | *TARGET, int readsyms) | |
105b175f JB |
582 | |
583 | DESCRIPTION | |
584 | ||
585 | Read in symbolic information for any shared objects whose names | |
586 | match PATTERN. (If we've already read a shared object's symbol | |
587 | info, leave it alone.) If PATTERN is zero, read them all. | |
588 | ||
990f9fe3 FF |
589 | If READSYMS is 0, defer reading symbolic information until later |
590 | but still do any needed low level processing. | |
591 | ||
105b175f JB |
592 | FROM_TTY and TARGET are as described for update_solib_list, above. */ |
593 | ||
594 | void | |
990f9fe3 | 595 | solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms) |
105b175f JB |
596 | { |
597 | struct so_list *gdb; | |
598 | ||
599 | if (pattern) | |
600 | { | |
601 | char *re_err = re_comp (pattern); | |
602 | ||
603 | if (re_err) | |
604 | error ("Invalid regexp: %s", re_err); | |
605 | } | |
606 | ||
607 | update_solib_list (from_tty, target); | |
c906108c | 608 | |
105b175f JB |
609 | /* Walk the list of currently loaded shared libraries, and read |
610 | symbols for any that match the pattern --- or any whose symbols | |
611 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
612 | { |
613 | int any_matches = 0; | |
614 | int loaded_any_symbols = 0; | |
c906108c | 615 | |
e8930304 JB |
616 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
617 | if (! pattern || re_exec (gdb->so_name)) | |
618 | { | |
619 | any_matches = 1; | |
42a6e6a0 MK |
620 | if (readsyms && solib_read_symbols (gdb, from_tty)) |
621 | loaded_any_symbols = 1; | |
e8930304 JB |
622 | } |
623 | ||
624 | if (from_tty && pattern && ! any_matches) | |
625 | printf_unfiltered | |
626 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
627 | ||
628 | if (loaded_any_symbols) | |
629 | { | |
630 | /* Getting new symbols may change our opinion about what is | |
631 | frameless. */ | |
632 | reinit_frame_cache (); | |
633 | ||
13437d4b | 634 | TARGET_SO_SPECIAL_SYMBOL_HANDLING (); |
e8930304 JB |
635 | } |
636 | } | |
c906108c SS |
637 | } |
638 | ||
07cd4b97 | 639 | |
c906108c SS |
640 | /* |
641 | ||
c5aa993b | 642 | LOCAL FUNCTION |
c906108c | 643 | |
c5aa993b | 644 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 645 | |
c5aa993b | 646 | SYNOPSIS |
c906108c | 647 | |
c5aa993b | 648 | static void info_sharedlibrary_command () |
c906108c | 649 | |
c5aa993b | 650 | DESCRIPTION |
c906108c | 651 | |
c5aa993b JM |
652 | Walk through the shared library list and print information |
653 | about each attached library. | |
654 | */ | |
c906108c SS |
655 | |
656 | static void | |
fba45db2 | 657 | info_sharedlibrary_command (char *ignore, int from_tty) |
c906108c | 658 | { |
52f0bd74 | 659 | struct so_list *so = NULL; /* link map state variable */ |
c906108c SS |
660 | int header_done = 0; |
661 | int addr_width; | |
c906108c | 662 | |
c7cccb76 | 663 | if (TARGET_PTR_BIT == 32) |
bb599908 | 664 | addr_width = 8 + 4; |
c7cccb76 | 665 | else if (TARGET_PTR_BIT == 64) |
bb599908 | 666 | addr_width = 16 + 4; |
7f7e9482 AC |
667 | else |
668 | { | |
8e65ff28 | 669 | internal_error (__FILE__, __LINE__, |
c7cccb76 MS |
670 | "TARGET_PTR_BIT returned unknown size %d", |
671 | TARGET_PTR_BIT); | |
7f7e9482 | 672 | } |
c906108c | 673 | |
105b175f | 674 | update_solib_list (from_tty, 0); |
07cd4b97 JB |
675 | |
676 | for (so = so_list_head; so; so = so->next) | |
c906108c | 677 | { |
c5aa993b | 678 | if (so->so_name[0]) |
c906108c SS |
679 | { |
680 | if (!header_done) | |
681 | { | |
c5aa993b JM |
682 | printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
683 | addr_width, "To", "Syms Read", | |
684 | "Shared Object Library"); | |
c906108c SS |
685 | header_done++; |
686 | } | |
687 | ||
688 | printf_unfiltered ("%-*s", addr_width, | |
749499cb | 689 | so->textsection != NULL |
bb599908 | 690 | ? hex_string_custom ( |
a43ad351 | 691 | (LONGEST) so->textsection->addr, |
bb599908 | 692 | addr_width - 4) |
749499cb | 693 | : ""); |
c906108c | 694 | printf_unfiltered ("%-*s", addr_width, |
749499cb | 695 | so->textsection != NULL |
bb599908 | 696 | ? hex_string_custom ( |
a43ad351 | 697 | (LONGEST) so->textsection->endaddr, |
bb599908 | 698 | addr_width - 4) |
749499cb | 699 | : ""); |
c5aa993b JM |
700 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); |
701 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
702 | } |
703 | } | |
704 | if (so_list_head == NULL) | |
705 | { | |
c5aa993b | 706 | printf_unfiltered ("No shared libraries loaded at this time.\n"); |
c906108c SS |
707 | } |
708 | } | |
709 | ||
710 | /* | |
711 | ||
c5aa993b | 712 | GLOBAL FUNCTION |
c906108c | 713 | |
c5aa993b | 714 | solib_address -- check to see if an address is in a shared lib |
c906108c | 715 | |
c5aa993b | 716 | SYNOPSIS |
c906108c | 717 | |
c5aa993b | 718 | char * solib_address (CORE_ADDR address) |
c906108c | 719 | |
c5aa993b | 720 | DESCRIPTION |
c906108c | 721 | |
c5aa993b JM |
722 | Provides a hook for other gdb routines to discover whether or |
723 | not a particular address is within the mapped address space of | |
749499cb | 724 | a shared library. |
c906108c | 725 | |
c5aa993b JM |
726 | For example, this routine is called at one point to disable |
727 | breakpoints which are in shared libraries that are not currently | |
728 | mapped in. | |
c906108c SS |
729 | */ |
730 | ||
731 | char * | |
fba45db2 | 732 | solib_address (CORE_ADDR address) |
c906108c | 733 | { |
52f0bd74 | 734 | struct so_list *so = 0; /* link map state variable */ |
c5aa993b | 735 | |
07cd4b97 | 736 | for (so = so_list_head; so; so = so->next) |
c906108c | 737 | { |
749499cb KB |
738 | struct section_table *p; |
739 | ||
740 | for (p = so->sections; p < so->sections_end; p++) | |
741 | { | |
742 | if (p->addr <= address && address < p->endaddr) | |
743 | return (so->so_name); | |
744 | } | |
c906108c | 745 | } |
07cd4b97 | 746 | |
c906108c SS |
747 | return (0); |
748 | } | |
749 | ||
750 | /* Called by free_all_symtabs */ | |
751 | ||
c5aa993b | 752 | void |
fba45db2 | 753 | clear_solib (void) |
c906108c | 754 | { |
085dd6e6 JM |
755 | /* This function is expected to handle ELF shared libraries. It is |
756 | also used on Solaris, which can run either ELF or a.out binaries | |
757 | (for compatibility with SunOS 4), both of which can use shared | |
758 | libraries. So we don't know whether we have an ELF executable or | |
759 | an a.out executable until the user chooses an executable file. | |
760 | ||
761 | ELF shared libraries don't get mapped into the address space | |
762 | until after the program starts, so we'd better not try to insert | |
763 | breakpoints in them immediately. We have to wait until the | |
764 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
765 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
766 | it's ready. | |
767 | ||
768 | SunOS shared libraries seem to be different --- they're present | |
769 | as soon as the process begins execution, so there's no need to | |
770 | put off inserting breakpoints. There's also nowhere to put a | |
771 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
772 | around to it. | |
773 | ||
774 | So: disable breakpoints only if we're using ELF shared libs. */ | |
775 | if (exec_bfd != NULL | |
776 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
777 | disable_breakpoints_in_shlibs (1); | |
778 | ||
c906108c SS |
779 | while (so_list_head) |
780 | { | |
07cd4b97 JB |
781 | struct so_list *so = so_list_head; |
782 | so_list_head = so->next; | |
2069d78d KB |
783 | if (so->abfd) |
784 | remove_target_sections (so->abfd); | |
07cd4b97 | 785 | free_so (so); |
c906108c | 786 | } |
07cd4b97 | 787 | |
13437d4b | 788 | TARGET_SO_CLEAR_SOLIB (); |
c906108c SS |
789 | } |
790 | ||
791 | static void | |
4efb68b1 | 792 | do_clear_solib (void *dummy) |
c906108c SS |
793 | { |
794 | solib_cleanup_queued = 0; | |
795 | clear_solib (); | |
796 | } | |
797 | ||
13437d4b | 798 | /* GLOBAL FUNCTION |
c5aa993b JM |
799 | |
800 | solib_create_inferior_hook -- shared library startup support | |
801 | ||
802 | SYNOPSIS | |
803 | ||
7095b863 | 804 | void solib_create_inferior_hook () |
c5aa993b JM |
805 | |
806 | DESCRIPTION | |
807 | ||
808 | When gdb starts up the inferior, it nurses it along (through the | |
809 | shell) until it is ready to execute it's first instruction. At this | |
810 | point, this function gets called via expansion of the macro | |
13437d4b | 811 | SOLIB_CREATE_INFERIOR_HOOK. */ |
c5aa993b JM |
812 | |
813 | void | |
fba45db2 | 814 | solib_create_inferior_hook (void) |
c906108c | 815 | { |
13437d4b | 816 | TARGET_SO_SOLIB_CREATE_INFERIOR_HOOK (); |
c906108c SS |
817 | } |
818 | ||
d7fa2ae2 KB |
819 | /* GLOBAL FUNCTION |
820 | ||
821 | in_solib_dynsym_resolve_code -- check to see if an address is in | |
822 | dynamic loader's dynamic symbol | |
823 | resolution code | |
824 | ||
825 | SYNOPSIS | |
826 | ||
827 | int in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
828 | ||
829 | DESCRIPTION | |
830 | ||
831 | Determine if PC is in the dynamic linker's symbol resolution | |
832 | code. Return 1 if so, 0 otherwise. | |
833 | */ | |
834 | ||
835 | int | |
836 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
837 | { | |
838 | return TARGET_SO_IN_DYNSYM_RESOLVE_CODE (pc); | |
839 | } | |
c906108c SS |
840 | |
841 | /* | |
842 | ||
c5aa993b | 843 | LOCAL FUNCTION |
c906108c | 844 | |
c5aa993b | 845 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 846 | |
c5aa993b | 847 | SYNOPSIS |
c906108c | 848 | |
c5aa993b | 849 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 850 | |
c5aa993b | 851 | DESCRIPTION |
c906108c | 852 | |
c5aa993b | 853 | */ |
c906108c SS |
854 | |
855 | static void | |
fba45db2 | 856 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
857 | { |
858 | dont_repeat (); | |
990f9fe3 | 859 | solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
860 | } |
861 | ||
cb0ba49e MS |
862 | /* LOCAL FUNCTION |
863 | ||
864 | no_shared_libraries -- handle command to explicitly discard symbols | |
865 | from shared libraries. | |
866 | ||
867 | DESCRIPTION | |
868 | ||
869 | Implements the command "nosharedlibrary", which discards symbols | |
870 | that have been auto-loaded from shared libraries. Symbols from | |
871 | shared libraries that were added by explicit request of the user | |
872 | are not discarded. Also called from remote.c. */ | |
873 | ||
c60a7562 MS |
874 | void |
875 | no_shared_libraries (char *ignored, int from_tty) | |
876 | { | |
877 | objfile_purge_solibs (); | |
878 | do_clear_solib (NULL); | |
879 | } | |
c906108c | 880 | |
cf466558 KB |
881 | static void |
882 | reload_shared_libraries (char *ignored, int from_tty) | |
883 | { | |
884 | no_shared_libraries (NULL, from_tty); | |
885 | solib_add (NULL, from_tty, NULL, auto_solib_add); | |
886 | } | |
887 | ||
a78f21af AC |
888 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
889 | ||
c906108c | 890 | void |
fba45db2 | 891 | _initialize_solib (void) |
c906108c | 892 | { |
fa58ee11 EZ |
893 | struct cmd_list_element *c; |
894 | ||
c906108c SS |
895 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
896 | "Load shared object library symbols for files matching REGEXP."); | |
c5aa993b | 897 | add_info ("sharedlibrary", info_sharedlibrary_command, |
c906108c | 898 | "Status of loaded shared object libraries."); |
c60a7562 | 899 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
e89a4777 | 900 | "Unload all shared object library symbols."); |
c906108c | 901 | |
cb1a6d5f | 902 | deprecated_add_show_from_set |
b7209cb4 | 903 | (add_set_cmd ("auto-solib-add", class_support, var_boolean, |
c906108c SS |
904 | (char *) &auto_solib_add, |
905 | "Set autoloading of shared library symbols.\n\ | |
b7209cb4 FF |
906 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
907 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
908 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
909 | inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'.", | |
c906108c SS |
910 | &setlist), |
911 | &showlist); | |
912 | ||
fa58ee11 EZ |
913 | c = add_set_cmd ("solib-absolute-prefix", class_support, var_filename, |
914 | (char *) &solib_absolute_prefix, | |
915 | "Set prefix for loading absolute shared library symbol files.\n\ | |
c906108c | 916 | For other (relative) files, you can add values using `set solib-search-path'.", |
fa58ee11 | 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 | |
030292b7 DJ |
922 | /* Set the default value of "solib-absolute-prefix" from the sysroot, if |
923 | one is set. */ | |
924 | solib_absolute_prefix = xstrdup (gdb_sysroot); | |
925 | ||
fa58ee11 EZ |
926 | c = add_set_cmd ("solib-search-path", class_support, var_string, |
927 | (char *) &solib_search_path, | |
928 | "Set the search path for loading non-absolute shared library symbol files.\n\ | |
929 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH.", | |
930 | &setlist); | |
cb1a6d5f | 931 | deprecated_add_show_from_set (c, &showlist); |
cf466558 | 932 | set_cmd_cfunc (c, reload_shared_libraries); |
5ba2abeb | 933 | set_cmd_completer (c, filename_completer); |
c906108c | 934 | } |