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; | |
920d2a44 AC |
73 | static void |
74 | show_solib_search_path (struct ui_file *file, int from_tty, | |
75 | struct cmd_list_element *c, const char *value) | |
76 | { | |
77 | fprintf_filtered (file, _("\ | |
78 | The search path for loading non-absolute shared library symbol files is %s.\n"), | |
79 | value); | |
80 | } | |
c906108c | 81 | |
e4f7b8c8 MS |
82 | /* |
83 | ||
84 | GLOBAL FUNCTION | |
85 | ||
86 | solib_open -- Find a shared library file and open it. | |
87 | ||
88 | SYNOPSIS | |
89 | ||
90 | int solib_open (char *in_patname, char **found_pathname); | |
91 | ||
92 | DESCRIPTION | |
93 | ||
94 | Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory | |
95 | to search for shared libraries if they have an absolute path. | |
96 | ||
97 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
98 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
99 | shared libraries if not found in SOLIB_ABSOLUTE_PREFIX. | |
100 | ||
c8c18e65 KW |
101 | Search algorithm: |
102 | * If there is a solib_absolute_prefix and path is absolute: | |
103 | * Search for solib_absolute_prefix/path. | |
104 | * else | |
105 | * Look for it literally (unmodified). | |
e4f7b8c8 | 106 | * Look in SOLIB_SEARCH_PATH. |
f43caff8 | 107 | * If available, use target defined search function. |
c8c18e65 KW |
108 | * If solib_absolute_prefix is NOT set, perform the following two searches: |
109 | * Look in inferior's $PATH. | |
110 | * Look in inferior's $LD_LIBRARY_PATH. | |
111 | * | |
112 | * The last check avoids doing this search when targetting remote | |
113 | * machines since solib_absolute_prefix will almost always be set. | |
e4f7b8c8 MS |
114 | |
115 | RETURNS | |
b21f0843 | 116 | |
e4f7b8c8 MS |
117 | file handle for opened solib, or -1 for failure. */ |
118 | ||
119 | int | |
120 | solib_open (char *in_pathname, char **found_pathname) | |
121 | { | |
122 | int found_file = -1; | |
123 | char *temp_pathname = NULL; | |
fe4e3eb8 | 124 | char *p = in_pathname; |
e4f7b8c8 | 125 | |
fe4e3eb8 EZ |
126 | while (*p && !IS_DIR_SEPARATOR (*p)) |
127 | p++; | |
128 | ||
129 | if (*p) | |
e4f7b8c8 | 130 | { |
fe4e3eb8 | 131 | if (! IS_ABSOLUTE_PATH (in_pathname) || solib_absolute_prefix == NULL) |
a7ec76fe KB |
132 | temp_pathname = in_pathname; |
133 | else | |
134 | { | |
b21f0843 | 135 | int prefix_len = strlen (solib_absolute_prefix); |
a7ec76fe KB |
136 | |
137 | /* Remove trailing slashes from absolute prefix. */ | |
b21f0843 | 138 | while (prefix_len > 0 |
fe4e3eb8 | 139 | && IS_DIR_SEPARATOR (solib_absolute_prefix[prefix_len - 1])) |
a7ec76fe KB |
140 | prefix_len--; |
141 | ||
142 | /* Cat the prefixed pathname together. */ | |
143 | temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1); | |
144 | strncpy (temp_pathname, solib_absolute_prefix, prefix_len); | |
145 | temp_pathname[prefix_len] = '\0'; | |
146 | strcat (temp_pathname, in_pathname); | |
a7ec76fe | 147 | } |
b21f0843 | 148 | |
e4f7b8c8 MS |
149 | /* Now see if we can open it. */ |
150 | found_file = open (temp_pathname, O_RDONLY, 0); | |
151 | } | |
152 | ||
ba5f0d88 OF |
153 | /* If the search in solib_absolute_prefix failed, and the path name is |
154 | absolute at this point, make it relative. (openp will try and open the | |
155 | file according to its absolute path otherwise, which is not what we want.) | |
156 | Affects subsequent searches for this solib. */ | |
157 | if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname)) | |
158 | { | |
159 | /* First, get rid of any drive letters etc. */ | |
160 | while (!IS_DIR_SEPARATOR (*in_pathname)) | |
161 | in_pathname++; | |
162 | ||
163 | /* Next, get rid of all leading dir separators. */ | |
164 | while (IS_DIR_SEPARATOR (*in_pathname)) | |
165 | in_pathname++; | |
166 | } | |
167 | ||
c8c18e65 | 168 | /* If not found, search the solib_search_path (if any). */ |
e4f7b8c8 | 169 | if (found_file < 0 && solib_search_path != NULL) |
014d698b EZ |
170 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
171 | in_pathname, O_RDONLY, 0, &temp_pathname); | |
ba5f0d88 OF |
172 | |
173 | /* If not found, next search the solib_search_path (if any) for the basename | |
174 | only (ignoring the path). This is to allow reading solibs from a path | |
175 | that differs from the opened path. */ | |
176 | if (found_file < 0 && solib_search_path != NULL) | |
014d698b EZ |
177 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
178 | lbasename (in_pathname), O_RDONLY, 0, | |
ba5f0d88 | 179 | &temp_pathname); |
e4f7b8c8 | 180 | |
2610b0bf KW |
181 | /* If not found, try to use target supplied solib search method */ |
182 | if (found_file < 0 && TARGET_SO_FIND_AND_OPEN_SOLIB != NULL) | |
183 | found_file = TARGET_SO_FIND_AND_OPEN_SOLIB | |
184 | (in_pathname, O_RDONLY, &temp_pathname); | |
185 | ||
e4f7b8c8 | 186 | /* If not found, next search the inferior's $PATH environment variable. */ |
c8c18e65 | 187 | if (found_file < 0 && solib_absolute_prefix == NULL) |
e4f7b8c8 | 188 | found_file = openp (get_in_environ (inferior_environ, "PATH"), |
014d698b EZ |
189 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY, 0, |
190 | &temp_pathname); | |
e4f7b8c8 MS |
191 | |
192 | /* If not found, next search the inferior's $LD_LIBRARY_PATH | |
193 | environment variable. */ | |
c8c18e65 | 194 | if (found_file < 0 && solib_absolute_prefix == NULL) |
e4f7b8c8 | 195 | found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"), |
014d698b EZ |
196 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY, 0, |
197 | &temp_pathname); | |
e4f7b8c8 MS |
198 | |
199 | /* Done. If not found, tough luck. Return found_file and | |
200 | (optionally) found_pathname. */ | |
a7ec76fe | 201 | if (found_pathname != NULL && temp_pathname != NULL) |
4fcf66da | 202 | *found_pathname = xstrdup (temp_pathname); |
e4f7b8c8 MS |
203 | return found_file; |
204 | } | |
205 | ||
206 | ||
c906108c SS |
207 | /* |
208 | ||
c5aa993b | 209 | LOCAL FUNCTION |
c906108c | 210 | |
c5aa993b | 211 | solib_map_sections -- open bfd and build sections for shared lib |
c906108c | 212 | |
c5aa993b | 213 | SYNOPSIS |
c906108c | 214 | |
c5aa993b | 215 | static int solib_map_sections (struct so_list *so) |
c906108c | 216 | |
c5aa993b | 217 | DESCRIPTION |
c906108c | 218 | |
c5aa993b JM |
219 | Given a pointer to one of the shared objects in our list |
220 | of mapped objects, use the recorded name to open a bfd | |
221 | descriptor for the object, build a section table, and then | |
222 | relocate all the section addresses by the base address at | |
223 | which the shared object was mapped. | |
c906108c | 224 | |
c5aa993b | 225 | FIXMES |
c906108c | 226 | |
c5aa993b JM |
227 | In most (all?) cases the shared object file name recorded in the |
228 | dynamic linkage tables will be a fully qualified pathname. For | |
229 | cases where it isn't, do we really mimic the systems search | |
230 | mechanism correctly in the below code (particularly the tilde | |
231 | expansion stuff?). | |
c906108c SS |
232 | */ |
233 | ||
234 | static int | |
4efb68b1 | 235 | solib_map_sections (void *arg) |
c906108c SS |
236 | { |
237 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
238 | char *filename; | |
239 | char *scratch_pathname; | |
240 | int scratch_chan; | |
241 | struct section_table *p; | |
242 | struct cleanup *old_chain; | |
243 | bfd *abfd; | |
c5aa993b JM |
244 | |
245 | filename = tilde_expand (so->so_name); | |
246 | ||
b8c9b27d | 247 | old_chain = make_cleanup (xfree, filename); |
e4f7b8c8 | 248 | scratch_chan = solib_open (filename, &scratch_pathname); |
c906108c | 249 | |
c906108c SS |
250 | if (scratch_chan < 0) |
251 | { | |
13437d4b KB |
252 | perror_with_name (filename); |
253 | } | |
104c1213 | 254 | |
e4f7b8c8 | 255 | /* Leave scratch_pathname allocated. abfd->name will point to it. */ |
13437d4b KB |
256 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); |
257 | if (!abfd) | |
23e04971 | 258 | { |
13437d4b | 259 | close (scratch_chan); |
8a3fe4f8 | 260 | error (_("Could not open `%s' as an executable file: %s"), |
13437d4b KB |
261 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
262 | } | |
e4f7b8c8 | 263 | |
13437d4b KB |
264 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
265 | so->abfd = abfd; | |
549c1eea | 266 | bfd_set_cacheable (abfd, 1); |
23e04971 | 267 | |
e4f7b8c8 MS |
268 | /* copy full path name into so_name, so that later symbol_file_add |
269 | can find it */ | |
13437d4b | 270 | if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE) |
8a3fe4f8 | 271 | error (_("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure.")); |
13437d4b | 272 | strcpy (so->so_name, scratch_pathname); |
23e04971 | 273 | |
13437d4b KB |
274 | if (!bfd_check_format (abfd, bfd_object)) |
275 | { | |
8a3fe4f8 | 276 | error (_("\"%s\": not in executable format: %s."), |
13437d4b | 277 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
23e04971 | 278 | } |
13437d4b | 279 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
23e04971 | 280 | { |
8a3fe4f8 | 281 | error (_("Can't find the file sections in `%s': %s"), |
13437d4b | 282 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
23e04971 | 283 | } |
104c1213 | 284 | |
13437d4b | 285 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 286 | { |
13437d4b KB |
287 | /* Relocate the section binding addresses as recorded in the shared |
288 | object's file by the base address to which the object was actually | |
289 | mapped. */ | |
749499cb | 290 | TARGET_SO_RELOCATE_SECTION_ADDRESSES (so, p); |
6314a349 | 291 | if (strcmp (p->the_bfd_section->name, ".text") == 0) |
13437d4b KB |
292 | { |
293 | so->textsection = p; | |
294 | } | |
104c1213 JM |
295 | } |
296 | ||
13437d4b KB |
297 | /* Free the file names, close the file now. */ |
298 | do_cleanups (old_chain); | |
104c1213 | 299 | |
13437d4b | 300 | return (1); |
104c1213 | 301 | } |
c906108c | 302 | |
07cd4b97 | 303 | /* LOCAL FUNCTION |
c906108c | 304 | |
07cd4b97 | 305 | free_so --- free a `struct so_list' object |
c906108c | 306 | |
c5aa993b | 307 | SYNOPSIS |
c906108c | 308 | |
07cd4b97 | 309 | void free_so (struct so_list *so) |
c906108c | 310 | |
c5aa993b | 311 | DESCRIPTION |
c906108c | 312 | |
07cd4b97 JB |
313 | Free the storage associated with the `struct so_list' object SO. |
314 | If we have opened a BFD for SO, close it. | |
c906108c | 315 | |
07cd4b97 JB |
316 | The caller is responsible for removing SO from whatever list it is |
317 | a member of. If we have placed SO's sections in some target's | |
318 | section table, the caller is responsible for removing them. | |
c906108c | 319 | |
07cd4b97 JB |
320 | This function doesn't mess with objfiles at all. If there is an |
321 | objfile associated with SO that needs to be removed, the caller is | |
322 | responsible for taking care of that. */ | |
323 | ||
13437d4b | 324 | void |
07cd4b97 | 325 | free_so (struct so_list *so) |
c906108c | 326 | { |
07cd4b97 | 327 | char *bfd_filename = 0; |
c5aa993b | 328 | |
07cd4b97 | 329 | if (so->sections) |
b8c9b27d | 330 | xfree (so->sections); |
07cd4b97 JB |
331 | |
332 | if (so->abfd) | |
c906108c | 333 | { |
07cd4b97 JB |
334 | bfd_filename = bfd_get_filename (so->abfd); |
335 | if (! bfd_close (so->abfd)) | |
8a3fe4f8 | 336 | warning (_("cannot close \"%s\": %s"), |
07cd4b97 | 337 | bfd_filename, bfd_errmsg (bfd_get_error ())); |
c906108c | 338 | } |
07cd4b97 JB |
339 | |
340 | if (bfd_filename) | |
b8c9b27d | 341 | xfree (bfd_filename); |
07cd4b97 | 342 | |
13437d4b | 343 | TARGET_SO_FREE_SO (so); |
07cd4b97 | 344 | |
b8c9b27d | 345 | xfree (so); |
c906108c SS |
346 | } |
347 | ||
07cd4b97 | 348 | |
f8766ec1 KB |
349 | /* Return address of first so_list entry in master shared object list. */ |
350 | struct so_list * | |
351 | master_so_list (void) | |
352 | { | |
353 | return so_list_head; | |
354 | } | |
355 | ||
356 | ||
c906108c SS |
357 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
358 | ||
359 | static int | |
4efb68b1 | 360 | symbol_add_stub (void *arg) |
c906108c | 361 | { |
52f0bd74 | 362 | struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
62557bbc | 363 | struct section_addr_info *sap; |
c906108c | 364 | |
07cd4b97 JB |
365 | /* Have we already loaded this shared object? */ |
366 | ALL_OBJFILES (so->objfile) | |
367 | { | |
368 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
369 | return 1; | |
370 | } | |
371 | ||
62557bbc KB |
372 | sap = build_section_addr_info_from_section_table (so->sections, |
373 | so->sections_end); | |
e7cf9df1 | 374 | |
62557bbc KB |
375 | so->objfile = symbol_file_add (so->so_name, so->from_tty, |
376 | sap, 0, OBJF_SHARED); | |
377 | free_section_addr_info (sap); | |
c906108c | 378 | |
07cd4b97 | 379 | return (1); |
c906108c SS |
380 | } |
381 | ||
42a6e6a0 MK |
382 | /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be |
383 | chatty about it. Return non-zero if any symbols were actually | |
384 | loaded. */ | |
385 | ||
386 | int | |
387 | solib_read_symbols (struct so_list *so, int from_tty) | |
388 | { | |
389 | if (so->symbols_loaded) | |
390 | { | |
391 | if (from_tty) | |
a3f17187 | 392 | printf_unfiltered (_("Symbols already loaded for %s\n"), so->so_name); |
42a6e6a0 MK |
393 | } |
394 | else | |
395 | { | |
396 | if (catch_errors (symbol_add_stub, so, | |
397 | "Error while reading shared library symbols:\n", | |
398 | RETURN_MASK_ALL)) | |
399 | { | |
400 | if (from_tty) | |
a3f17187 | 401 | printf_unfiltered (_("Loaded symbols for %s\n"), so->so_name); |
42a6e6a0 MK |
402 | so->symbols_loaded = 1; |
403 | return 1; | |
404 | } | |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
c906108c | 409 | |
07cd4b97 | 410 | /* LOCAL FUNCTION |
c906108c | 411 | |
105b175f | 412 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 413 | |
c5aa993b | 414 | SYNOPSIS |
c906108c | 415 | |
105b175f | 416 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 417 | |
07cd4b97 | 418 | Extract the list of currently loaded shared objects from the |
105b175f JB |
419 | inferior, and compare it with the list of shared objects currently |
420 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
421 | with the inferior's new list. | |
c906108c | 422 | |
105b175f JB |
423 | If we notice that the inferior has unloaded some shared objects, |
424 | free any symbolic info GDB had read about those shared objects. | |
425 | ||
426 | Don't load symbolic info for any new shared objects; just add them | |
427 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
428 | |
429 | If FROM_TTY is non-null, feel free to print messages about what | |
430 | we're doing. | |
c906108c | 431 | |
07cd4b97 JB |
432 | If TARGET is non-null, add the sections of all new shared objects |
433 | to TARGET's section table. Note that this doesn't remove any | |
434 | sections for shared objects that have been unloaded, and it | |
435 | doesn't check to see if the new shared objects are already present in | |
436 | the section table. But we only use this for core files and | |
437 | processes we've just attached to, so that's okay. */ | |
c906108c | 438 | |
a78f21af | 439 | static void |
105b175f | 440 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 | 441 | { |
13437d4b | 442 | struct so_list *inferior = TARGET_SO_CURRENT_SOS (); |
07cd4b97 JB |
443 | struct so_list *gdb, **gdb_link; |
444 | ||
104c1213 JM |
445 | /* If we are attaching to a running process for which we |
446 | have not opened a symbol file, we may be able to get its | |
447 | symbols now! */ | |
448 | if (attach_flag && | |
449 | symfile_objfile == NULL) | |
4efb68b1 | 450 | catch_errors (TARGET_SO_OPEN_SYMBOL_FILE_OBJECT, &from_tty, |
104c1213 JM |
451 | "Error reading attached process's symbol file.\n", |
452 | RETURN_MASK_ALL); | |
453 | ||
07cd4b97 JB |
454 | /* Since this function might actually add some elements to the |
455 | so_list_head list, arrange for it to be cleaned up when | |
456 | appropriate. */ | |
457 | if (!solib_cleanup_queued) | |
458 | { | |
459 | make_run_cleanup (do_clear_solib, NULL); | |
460 | solib_cleanup_queued = 1; | |
c906108c | 461 | } |
c5aa993b | 462 | |
07cd4b97 JB |
463 | /* GDB and the inferior's dynamic linker each maintain their own |
464 | list of currently loaded shared objects; we want to bring the | |
465 | former in sync with the latter. Scan both lists, seeing which | |
466 | shared objects appear where. There are three cases: | |
467 | ||
468 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
469 | knows about it already, and it's still loaded in the inferior. |
470 | Nothing needs to happen. | |
07cd4b97 JB |
471 | |
472 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
473 | the inferior has unloaded it. We should remove the shared |
474 | object from GDB's tables. | |
07cd4b97 JB |
475 | |
476 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
477 | means that it's just been loaded. We should add it to GDB's |
478 | tables. | |
07cd4b97 JB |
479 | |
480 | So we walk GDB's list, checking each entry to see if it appears | |
481 | in the inferior's list too. If it does, no action is needed, and | |
482 | we remove it from the inferior's list. If it doesn't, the | |
483 | inferior has unloaded it, and we remove it from GDB's list. By | |
484 | the time we're done walking GDB's list, the inferior's list | |
485 | contains only the new shared objects, which we then add. */ | |
486 | ||
487 | gdb = so_list_head; | |
488 | gdb_link = &so_list_head; | |
489 | while (gdb) | |
c906108c | 490 | { |
07cd4b97 JB |
491 | struct so_list *i = inferior; |
492 | struct so_list **i_link = &inferior; | |
493 | ||
494 | /* Check to see whether the shared object *gdb also appears in | |
495 | the inferior's current list. */ | |
496 | while (i) | |
c906108c | 497 | { |
07cd4b97 JB |
498 | if (! strcmp (gdb->so_original_name, i->so_original_name)) |
499 | break; | |
500 | ||
501 | i_link = &i->next; | |
502 | i = *i_link; | |
c906108c | 503 | } |
c5aa993b | 504 | |
07cd4b97 JB |
505 | /* If the shared object appears on the inferior's list too, then |
506 | it's still loaded, so we don't need to do anything. Delete | |
507 | it from the inferior's list, and leave it on GDB's list. */ | |
508 | if (i) | |
c906108c | 509 | { |
07cd4b97 | 510 | *i_link = i->next; |
07cd4b97 JB |
511 | free_so (i); |
512 | gdb_link = &gdb->next; | |
513 | gdb = *gdb_link; | |
514 | } | |
515 | ||
516 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
517 | else | |
518 | { | |
42a6e6a0 MK |
519 | /* Notify any observer that the shared object has been |
520 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
521 | observer_notify_solib_unloaded (gdb); |
522 | ||
07cd4b97 | 523 | *gdb_link = gdb->next; |
07cd4b97 JB |
524 | |
525 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 526 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
527 | free_objfile (gdb->objfile); |
528 | ||
529 | /* Some targets' section tables might be referring to | |
530 | sections from so->abfd; remove them. */ | |
531 | remove_target_sections (gdb->abfd); | |
532 | ||
533 | free_so (gdb); | |
534 | gdb = *gdb_link; | |
c906108c SS |
535 | } |
536 | } | |
c5aa993b | 537 | |
07cd4b97 JB |
538 | /* Now the inferior's list contains only shared objects that don't |
539 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 540 | to GDB's shared object list. */ |
07cd4b97 | 541 | if (inferior) |
c906108c | 542 | { |
07cd4b97 JB |
543 | struct so_list *i; |
544 | ||
545 | /* Add the new shared objects to GDB's list. */ | |
546 | *gdb_link = inferior; | |
547 | ||
e8930304 | 548 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 549 | for (i = inferior; i; i = i->next) |
c906108c | 550 | { |
07cd4b97 JB |
551 | i->from_tty = from_tty; |
552 | ||
553 | /* Fill in the rest of the `struct so_list' node. */ | |
554 | catch_errors (solib_map_sections, i, | |
555 | "Error while mapping shared library sections:\n", | |
556 | RETURN_MASK_ALL); | |
07cd4b97 | 557 | |
b41be06e ND |
558 | /* If requested, add the shared object's sections to the TARGET's |
559 | section table. Do this immediately after mapping the object so | |
560 | that later nodes in the list can query this object, as is needed | |
561 | in solib-osf.c. */ | |
562 | if (target) | |
c906108c | 563 | { |
b41be06e ND |
564 | int count = (i->sections_end - i->sections); |
565 | if (count > 0) | |
07cd4b97 | 566 | { |
b41be06e | 567 | int space = target_resize_to_sections (target, count); |
07cd4b97 JB |
568 | memcpy (target->to_sections + space, |
569 | i->sections, | |
570 | count * sizeof (i->sections[0])); | |
07cd4b97 | 571 | } |
c906108c | 572 | } |
42a6e6a0 MK |
573 | |
574 | /* Notify any observer that the shared object has been | |
575 | loaded now that we've added it to GDB's tables. */ | |
576 | observer_notify_solib_loaded (i); | |
c906108c | 577 | } |
e8930304 | 578 | } |
105b175f JB |
579 | } |
580 | ||
581 | ||
582 | /* GLOBAL FUNCTION | |
583 | ||
584 | solib_add -- read in symbol info for newly added shared libraries | |
585 | ||
586 | SYNOPSIS | |
587 | ||
990f9fe3 FF |
588 | void solib_add (char *pattern, int from_tty, struct target_ops |
589 | *TARGET, int readsyms) | |
105b175f JB |
590 | |
591 | DESCRIPTION | |
592 | ||
593 | Read in symbolic information for any shared objects whose names | |
594 | match PATTERN. (If we've already read a shared object's symbol | |
595 | info, leave it alone.) If PATTERN is zero, read them all. | |
596 | ||
990f9fe3 FF |
597 | If READSYMS is 0, defer reading symbolic information until later |
598 | but still do any needed low level processing. | |
599 | ||
105b175f JB |
600 | FROM_TTY and TARGET are as described for update_solib_list, above. */ |
601 | ||
602 | void | |
990f9fe3 | 603 | solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms) |
105b175f JB |
604 | { |
605 | struct so_list *gdb; | |
606 | ||
607 | if (pattern) | |
608 | { | |
609 | char *re_err = re_comp (pattern); | |
610 | ||
611 | if (re_err) | |
8a3fe4f8 | 612 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
613 | } |
614 | ||
615 | update_solib_list (from_tty, target); | |
c906108c | 616 | |
105b175f JB |
617 | /* Walk the list of currently loaded shared libraries, and read |
618 | symbols for any that match the pattern --- or any whose symbols | |
619 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
620 | { |
621 | int any_matches = 0; | |
622 | int loaded_any_symbols = 0; | |
c906108c | 623 | |
e8930304 JB |
624 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
625 | if (! pattern || re_exec (gdb->so_name)) | |
626 | { | |
627 | any_matches = 1; | |
42a6e6a0 MK |
628 | if (readsyms && solib_read_symbols (gdb, from_tty)) |
629 | loaded_any_symbols = 1; | |
e8930304 JB |
630 | } |
631 | ||
632 | if (from_tty && pattern && ! any_matches) | |
633 | printf_unfiltered | |
634 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
635 | ||
636 | if (loaded_any_symbols) | |
637 | { | |
638 | /* Getting new symbols may change our opinion about what is | |
639 | frameless. */ | |
640 | reinit_frame_cache (); | |
641 | ||
13437d4b | 642 | TARGET_SO_SPECIAL_SYMBOL_HANDLING (); |
e8930304 JB |
643 | } |
644 | } | |
c906108c SS |
645 | } |
646 | ||
07cd4b97 | 647 | |
c906108c SS |
648 | /* |
649 | ||
c5aa993b | 650 | LOCAL FUNCTION |
c906108c | 651 | |
c5aa993b | 652 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 653 | |
c5aa993b | 654 | SYNOPSIS |
c906108c | 655 | |
c5aa993b | 656 | static void info_sharedlibrary_command () |
c906108c | 657 | |
c5aa993b | 658 | DESCRIPTION |
c906108c | 659 | |
c5aa993b JM |
660 | Walk through the shared library list and print information |
661 | about each attached library. | |
662 | */ | |
c906108c SS |
663 | |
664 | static void | |
fba45db2 | 665 | info_sharedlibrary_command (char *ignore, int from_tty) |
c906108c | 666 | { |
52f0bd74 | 667 | struct so_list *so = NULL; /* link map state variable */ |
c906108c SS |
668 | int header_done = 0; |
669 | int addr_width; | |
c906108c | 670 | |
c7cccb76 | 671 | if (TARGET_PTR_BIT == 32) |
bb599908 | 672 | addr_width = 8 + 4; |
c7cccb76 | 673 | else if (TARGET_PTR_BIT == 64) |
bb599908 | 674 | addr_width = 16 + 4; |
7f7e9482 AC |
675 | else |
676 | { | |
8e65ff28 | 677 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 678 | _("TARGET_PTR_BIT returned unknown size %d"), |
c7cccb76 | 679 | TARGET_PTR_BIT); |
7f7e9482 | 680 | } |
c906108c | 681 | |
105b175f | 682 | update_solib_list (from_tty, 0); |
07cd4b97 JB |
683 | |
684 | for (so = so_list_head; so; so = so->next) | |
c906108c | 685 | { |
c5aa993b | 686 | if (so->so_name[0]) |
c906108c SS |
687 | { |
688 | if (!header_done) | |
689 | { | |
c5aa993b JM |
690 | printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
691 | addr_width, "To", "Syms Read", | |
692 | "Shared Object Library"); | |
c906108c SS |
693 | header_done++; |
694 | } | |
695 | ||
696 | printf_unfiltered ("%-*s", addr_width, | |
749499cb | 697 | so->textsection != NULL |
bb599908 | 698 | ? hex_string_custom ( |
a43ad351 | 699 | (LONGEST) so->textsection->addr, |
bb599908 | 700 | addr_width - 4) |
749499cb | 701 | : ""); |
c906108c | 702 | printf_unfiltered ("%-*s", addr_width, |
749499cb | 703 | so->textsection != NULL |
bb599908 | 704 | ? hex_string_custom ( |
a43ad351 | 705 | (LONGEST) so->textsection->endaddr, |
bb599908 | 706 | addr_width - 4) |
749499cb | 707 | : ""); |
c5aa993b JM |
708 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); |
709 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
710 | } |
711 | } | |
712 | if (so_list_head == NULL) | |
713 | { | |
a3f17187 | 714 | printf_unfiltered (_("No shared libraries loaded at this time.\n")); |
c906108c SS |
715 | } |
716 | } | |
717 | ||
718 | /* | |
719 | ||
c5aa993b | 720 | GLOBAL FUNCTION |
c906108c | 721 | |
c5aa993b | 722 | solib_address -- check to see if an address is in a shared lib |
c906108c | 723 | |
c5aa993b | 724 | SYNOPSIS |
c906108c | 725 | |
c5aa993b | 726 | char * solib_address (CORE_ADDR address) |
c906108c | 727 | |
c5aa993b | 728 | DESCRIPTION |
c906108c | 729 | |
c5aa993b JM |
730 | Provides a hook for other gdb routines to discover whether or |
731 | not a particular address is within the mapped address space of | |
749499cb | 732 | a shared library. |
c906108c | 733 | |
c5aa993b JM |
734 | For example, this routine is called at one point to disable |
735 | breakpoints which are in shared libraries that are not currently | |
736 | mapped in. | |
c906108c SS |
737 | */ |
738 | ||
739 | char * | |
fba45db2 | 740 | solib_address (CORE_ADDR address) |
c906108c | 741 | { |
52f0bd74 | 742 | struct so_list *so = 0; /* link map state variable */ |
c5aa993b | 743 | |
07cd4b97 | 744 | for (so = so_list_head; so; so = so->next) |
c906108c | 745 | { |
749499cb KB |
746 | struct section_table *p; |
747 | ||
748 | for (p = so->sections; p < so->sections_end; p++) | |
749 | { | |
750 | if (p->addr <= address && address < p->endaddr) | |
751 | return (so->so_name); | |
752 | } | |
c906108c | 753 | } |
07cd4b97 | 754 | |
c906108c SS |
755 | return (0); |
756 | } | |
757 | ||
758 | /* Called by free_all_symtabs */ | |
759 | ||
c5aa993b | 760 | void |
fba45db2 | 761 | clear_solib (void) |
c906108c | 762 | { |
085dd6e6 JM |
763 | /* This function is expected to handle ELF shared libraries. It is |
764 | also used on Solaris, which can run either ELF or a.out binaries | |
765 | (for compatibility with SunOS 4), both of which can use shared | |
766 | libraries. So we don't know whether we have an ELF executable or | |
767 | an a.out executable until the user chooses an executable file. | |
768 | ||
769 | ELF shared libraries don't get mapped into the address space | |
770 | until after the program starts, so we'd better not try to insert | |
771 | breakpoints in them immediately. We have to wait until the | |
772 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
773 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
774 | it's ready. | |
775 | ||
776 | SunOS shared libraries seem to be different --- they're present | |
777 | as soon as the process begins execution, so there's no need to | |
778 | put off inserting breakpoints. There's also nowhere to put a | |
779 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
780 | around to it. | |
781 | ||
782 | So: disable breakpoints only if we're using ELF shared libs. */ | |
783 | if (exec_bfd != NULL | |
784 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
785 | disable_breakpoints_in_shlibs (1); | |
786 | ||
c906108c SS |
787 | while (so_list_head) |
788 | { | |
07cd4b97 JB |
789 | struct so_list *so = so_list_head; |
790 | so_list_head = so->next; | |
2069d78d KB |
791 | if (so->abfd) |
792 | remove_target_sections (so->abfd); | |
07cd4b97 | 793 | free_so (so); |
c906108c | 794 | } |
07cd4b97 | 795 | |
13437d4b | 796 | TARGET_SO_CLEAR_SOLIB (); |
c906108c SS |
797 | } |
798 | ||
799 | static void | |
4efb68b1 | 800 | do_clear_solib (void *dummy) |
c906108c SS |
801 | { |
802 | solib_cleanup_queued = 0; | |
803 | clear_solib (); | |
804 | } | |
805 | ||
13437d4b | 806 | /* GLOBAL FUNCTION |
c5aa993b JM |
807 | |
808 | solib_create_inferior_hook -- shared library startup support | |
809 | ||
810 | SYNOPSIS | |
811 | ||
7095b863 | 812 | void solib_create_inferior_hook () |
c5aa993b JM |
813 | |
814 | DESCRIPTION | |
815 | ||
816 | When gdb starts up the inferior, it nurses it along (through the | |
817 | shell) until it is ready to execute it's first instruction. At this | |
818 | point, this function gets called via expansion of the macro | |
13437d4b | 819 | SOLIB_CREATE_INFERIOR_HOOK. */ |
c5aa993b JM |
820 | |
821 | void | |
fba45db2 | 822 | solib_create_inferior_hook (void) |
c906108c | 823 | { |
13437d4b | 824 | TARGET_SO_SOLIB_CREATE_INFERIOR_HOOK (); |
c906108c SS |
825 | } |
826 | ||
d7fa2ae2 KB |
827 | /* GLOBAL FUNCTION |
828 | ||
829 | in_solib_dynsym_resolve_code -- check to see if an address is in | |
830 | dynamic loader's dynamic symbol | |
831 | resolution code | |
832 | ||
833 | SYNOPSIS | |
834 | ||
835 | int in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
836 | ||
837 | DESCRIPTION | |
838 | ||
839 | Determine if PC is in the dynamic linker's symbol resolution | |
840 | code. Return 1 if so, 0 otherwise. | |
841 | */ | |
842 | ||
843 | int | |
844 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
845 | { | |
846 | return TARGET_SO_IN_DYNSYM_RESOLVE_CODE (pc); | |
847 | } | |
c906108c SS |
848 | |
849 | /* | |
850 | ||
c5aa993b | 851 | LOCAL FUNCTION |
c906108c | 852 | |
c5aa993b | 853 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 854 | |
c5aa993b | 855 | SYNOPSIS |
c906108c | 856 | |
c5aa993b | 857 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 858 | |
c5aa993b | 859 | DESCRIPTION |
c906108c | 860 | |
c5aa993b | 861 | */ |
c906108c SS |
862 | |
863 | static void | |
fba45db2 | 864 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
865 | { |
866 | dont_repeat (); | |
990f9fe3 | 867 | solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
868 | } |
869 | ||
cb0ba49e MS |
870 | /* LOCAL FUNCTION |
871 | ||
872 | no_shared_libraries -- handle command to explicitly discard symbols | |
873 | from shared libraries. | |
874 | ||
875 | DESCRIPTION | |
876 | ||
877 | Implements the command "nosharedlibrary", which discards symbols | |
878 | that have been auto-loaded from shared libraries. Symbols from | |
879 | shared libraries that were added by explicit request of the user | |
880 | are not discarded. Also called from remote.c. */ | |
881 | ||
c60a7562 MS |
882 | void |
883 | no_shared_libraries (char *ignored, int from_tty) | |
884 | { | |
885 | objfile_purge_solibs (); | |
886 | do_clear_solib (NULL); | |
887 | } | |
c906108c | 888 | |
cf466558 | 889 | static void |
f397e303 AC |
890 | reload_shared_libraries (char *ignored, int from_tty, |
891 | struct cmd_list_element *e) | |
cf466558 KB |
892 | { |
893 | no_shared_libraries (NULL, from_tty); | |
894 | solib_add (NULL, from_tty, NULL, auto_solib_add); | |
895 | } | |
896 | ||
920d2a44 AC |
897 | static void |
898 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
899 | struct cmd_list_element *c, const char *value) | |
900 | { | |
901 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
902 | value); | |
903 | } | |
904 | ||
905 | ||
a78f21af AC |
906 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
907 | ||
c906108c | 908 | void |
fba45db2 | 909 | _initialize_solib (void) |
c906108c | 910 | { |
fa58ee11 EZ |
911 | struct cmd_list_element *c; |
912 | ||
c906108c | 913 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 914 | _("Load shared object library symbols for files matching REGEXP.")); |
c5aa993b | 915 | add_info ("sharedlibrary", info_sharedlibrary_command, |
1bedd215 | 916 | _("Status of loaded shared object libraries.")); |
c60a7562 | 917 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 918 | _("Unload all shared object library symbols.")); |
c906108c | 919 | |
5bf193a2 AC |
920 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
921 | &auto_solib_add, _("\ | |
922 | Set autoloading of shared library symbols."), _("\ | |
923 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
924 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
925 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
926 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
5bf193a2 AC |
927 | inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."), |
928 | NULL, | |
920d2a44 | 929 | show_auto_solib_add, |
5bf193a2 | 930 | &setlist, &showlist); |
c906108c | 931 | |
f397e303 AC |
932 | add_setshow_filename_cmd ("solib-absolute-prefix", class_support, |
933 | &solib_absolute_prefix, _("\ | |
934 | Set prefix for loading absolute shared library symbol files."), _("\ | |
935 | Show prefix for loading absolute shared library symbol files."), _("\ | |
936 | For other (relative) files, you can add values using `set solib-search-path'."), | |
937 | reload_shared_libraries, | |
938 | NULL, | |
939 | &setlist, &showlist); | |
c906108c | 940 | |
030292b7 DJ |
941 | /* Set the default value of "solib-absolute-prefix" from the sysroot, if |
942 | one is set. */ | |
943 | solib_absolute_prefix = xstrdup (gdb_sysroot); | |
944 | ||
525226b5 AC |
945 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
946 | &solib_search_path, _("\ | |
947 | Set the search path for loading non-absolute shared library symbol files."), _("\ | |
948 | Show the search path for loading non-absolute shared library symbol files."), _("\ | |
949 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."), | |
950 | reload_shared_libraries, | |
920d2a44 | 951 | show_solib_search_path, |
525226b5 | 952 | &setlist, &showlist); |
c906108c | 953 | } |