Commit | Line | Data |
---|---|---|
13437d4b | 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
14a5e767 | 2 | |
197e01b6 | 3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
f1d10cfb | 4 | 1999, 2000, 2001, 2002, 2003, 2005, 2006 |
42a6e6a0 | 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 | |
197e01b6 EZ |
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, 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 | |
66aba65d MK |
50 | /* Architecture-specific operations. */ |
51 | ||
52 | /* Per-architecture data key. */ | |
53 | static struct gdbarch_data *solib_data; | |
54 | ||
55 | static void * | |
56 | solib_init (struct obstack *obstack) | |
57 | { | |
58 | struct target_so_ops **ops; | |
59 | ||
60 | ops = OBSTACK_ZALLOC (obstack, struct target_so_ops *); | |
61 | *ops = current_target_so_ops; | |
62 | return ops; | |
63 | } | |
64 | ||
65 | static struct target_so_ops * | |
66 | solib_ops (struct gdbarch *gdbarch) | |
67 | { | |
68 | struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data); | |
69 | return *ops; | |
70 | } | |
71 | \f | |
72 | ||
13437d4b | 73 | /* external data declarations */ |
c906108c | 74 | |
13437d4b KB |
75 | /* FIXME: gdbarch needs to control this variable */ |
76 | struct target_so_ops *current_target_so_ops; | |
23e04971 MS |
77 | |
78 | /* local data declarations */ | |
07cd4b97 | 79 | |
c906108c | 80 | static struct so_list *so_list_head; /* List of known shared objects */ |
23e04971 | 81 | |
c5aa993b | 82 | static int solib_cleanup_queued = 0; /* make_run_cleanup called */ |
c906108c | 83 | |
c906108c SS |
84 | /* Local function prototypes */ |
85 | ||
4efb68b1 | 86 | static void do_clear_solib (void *); |
c906108c | 87 | |
c906108c SS |
88 | /* If non-zero, this is a prefix that will be added to the front of the name |
89 | shared libraries with an absolute filename for loading. */ | |
90 | static char *solib_absolute_prefix = NULL; | |
91 | ||
92 | /* If non-empty, this is a search path for loading non-absolute shared library | |
93 | symbol files. This takes precedence over the environment variables PATH | |
94 | and LD_LIBRARY_PATH. */ | |
95 | static char *solib_search_path = NULL; | |
920d2a44 AC |
96 | static void |
97 | show_solib_search_path (struct ui_file *file, int from_tty, | |
98 | struct cmd_list_element *c, const char *value) | |
99 | { | |
100 | fprintf_filtered (file, _("\ | |
101 | The search path for loading non-absolute shared library symbol files is %s.\n"), | |
102 | value); | |
103 | } | |
c906108c | 104 | |
e4f7b8c8 MS |
105 | /* |
106 | ||
107 | GLOBAL FUNCTION | |
108 | ||
109 | solib_open -- Find a shared library file and open it. | |
110 | ||
111 | SYNOPSIS | |
112 | ||
113 | int solib_open (char *in_patname, char **found_pathname); | |
114 | ||
115 | DESCRIPTION | |
116 | ||
117 | Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory | |
118 | to search for shared libraries if they have an absolute path. | |
119 | ||
120 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
121 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
122 | shared libraries if not found in SOLIB_ABSOLUTE_PREFIX. | |
123 | ||
c8c18e65 KW |
124 | Search algorithm: |
125 | * If there is a solib_absolute_prefix and path is absolute: | |
126 | * Search for solib_absolute_prefix/path. | |
127 | * else | |
128 | * Look for it literally (unmodified). | |
e4f7b8c8 | 129 | * Look in SOLIB_SEARCH_PATH. |
f43caff8 | 130 | * If available, use target defined search function. |
c8c18e65 KW |
131 | * If solib_absolute_prefix is NOT set, perform the following two searches: |
132 | * Look in inferior's $PATH. | |
133 | * Look in inferior's $LD_LIBRARY_PATH. | |
134 | * | |
135 | * The last check avoids doing this search when targetting remote | |
136 | * machines since solib_absolute_prefix will almost always be set. | |
e4f7b8c8 MS |
137 | |
138 | RETURNS | |
b21f0843 | 139 | |
e4f7b8c8 MS |
140 | file handle for opened solib, or -1 for failure. */ |
141 | ||
142 | int | |
143 | solib_open (char *in_pathname, char **found_pathname) | |
144 | { | |
66aba65d | 145 | struct target_so_ops *ops = solib_ops (current_gdbarch); |
e4f7b8c8 MS |
146 | int found_file = -1; |
147 | char *temp_pathname = NULL; | |
fe4e3eb8 | 148 | char *p = in_pathname; |
58dc52c3 DJ |
149 | int solib_absolute_prefix_is_empty; |
150 | ||
151 | solib_absolute_prefix_is_empty = (solib_absolute_prefix == NULL | |
152 | || *solib_absolute_prefix == 0); | |
e4f7b8c8 | 153 | |
f1d10cfb AS |
154 | if (! IS_ABSOLUTE_PATH (in_pathname) || solib_absolute_prefix_is_empty) |
155 | temp_pathname = in_pathname; | |
156 | else | |
e4f7b8c8 | 157 | { |
f1d10cfb AS |
158 | int prefix_len = strlen (solib_absolute_prefix); |
159 | ||
160 | /* Remove trailing slashes from absolute prefix. */ | |
161 | while (prefix_len > 0 | |
162 | && IS_DIR_SEPARATOR (solib_absolute_prefix[prefix_len - 1])) | |
163 | prefix_len--; | |
164 | ||
165 | /* Cat the prefixed pathname together. */ | |
166 | temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1); | |
167 | strncpy (temp_pathname, solib_absolute_prefix, prefix_len); | |
168 | temp_pathname[prefix_len] = '\0'; | |
169 | strcat (temp_pathname, in_pathname); | |
e4f7b8c8 MS |
170 | } |
171 | ||
f1d10cfb AS |
172 | /* Now see if we can open it. */ |
173 | found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0); | |
174 | ||
ba5f0d88 OF |
175 | /* If the search in solib_absolute_prefix failed, and the path name is |
176 | absolute at this point, make it relative. (openp will try and open the | |
177 | file according to its absolute path otherwise, which is not what we want.) | |
178 | Affects subsequent searches for this solib. */ | |
179 | if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname)) | |
180 | { | |
181 | /* First, get rid of any drive letters etc. */ | |
182 | while (!IS_DIR_SEPARATOR (*in_pathname)) | |
183 | in_pathname++; | |
184 | ||
185 | /* Next, get rid of all leading dir separators. */ | |
186 | while (IS_DIR_SEPARATOR (*in_pathname)) | |
187 | in_pathname++; | |
188 | } | |
189 | ||
c8c18e65 | 190 | /* If not found, search the solib_search_path (if any). */ |
e4f7b8c8 | 191 | if (found_file < 0 && solib_search_path != NULL) |
014d698b | 192 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
637d6690 | 193 | in_pathname, O_RDONLY | O_BINARY, 0, &temp_pathname); |
ba5f0d88 OF |
194 | |
195 | /* If not found, next search the solib_search_path (if any) for the basename | |
196 | only (ignoring the path). This is to allow reading solibs from a path | |
197 | that differs from the opened path. */ | |
198 | if (found_file < 0 && solib_search_path != NULL) | |
014d698b | 199 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
637d6690 | 200 | lbasename (in_pathname), O_RDONLY | O_BINARY, 0, |
ba5f0d88 | 201 | &temp_pathname); |
e4f7b8c8 | 202 | |
2610b0bf | 203 | /* If not found, try to use target supplied solib search method */ |
66aba65d | 204 | if (found_file < 0 && ops->find_and_open_solib) |
637d6690 | 205 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 206 | &temp_pathname); |
2610b0bf | 207 | |
e4f7b8c8 | 208 | /* If not found, next search the inferior's $PATH environment variable. */ |
58dc52c3 | 209 | if (found_file < 0 && solib_absolute_prefix_is_empty) |
e4f7b8c8 | 210 | found_file = openp (get_in_environ (inferior_environ, "PATH"), |
637d6690 | 211 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0, |
014d698b | 212 | &temp_pathname); |
e4f7b8c8 MS |
213 | |
214 | /* If not found, next search the inferior's $LD_LIBRARY_PATH | |
215 | environment variable. */ | |
58dc52c3 | 216 | if (found_file < 0 && solib_absolute_prefix_is_empty) |
e4f7b8c8 | 217 | found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"), |
637d6690 | 218 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0, |
014d698b | 219 | &temp_pathname); |
e4f7b8c8 MS |
220 | |
221 | /* Done. If not found, tough luck. Return found_file and | |
222 | (optionally) found_pathname. */ | |
a7ec76fe | 223 | if (found_pathname != NULL && temp_pathname != NULL) |
4fcf66da | 224 | *found_pathname = xstrdup (temp_pathname); |
e4f7b8c8 MS |
225 | return found_file; |
226 | } | |
227 | ||
228 | ||
c906108c SS |
229 | /* |
230 | ||
c5aa993b | 231 | LOCAL FUNCTION |
c906108c | 232 | |
c5aa993b | 233 | solib_map_sections -- open bfd and build sections for shared lib |
c906108c | 234 | |
c5aa993b | 235 | SYNOPSIS |
c906108c | 236 | |
c5aa993b | 237 | static int solib_map_sections (struct so_list *so) |
c906108c | 238 | |
c5aa993b | 239 | DESCRIPTION |
c906108c | 240 | |
c5aa993b JM |
241 | Given a pointer to one of the shared objects in our list |
242 | of mapped objects, use the recorded name to open a bfd | |
243 | descriptor for the object, build a section table, and then | |
244 | relocate all the section addresses by the base address at | |
245 | which the shared object was mapped. | |
c906108c | 246 | |
c5aa993b | 247 | FIXMES |
c906108c | 248 | |
c5aa993b JM |
249 | In most (all?) cases the shared object file name recorded in the |
250 | dynamic linkage tables will be a fully qualified pathname. For | |
251 | cases where it isn't, do we really mimic the systems search | |
252 | mechanism correctly in the below code (particularly the tilde | |
253 | expansion stuff?). | |
c906108c SS |
254 | */ |
255 | ||
256 | static int | |
4efb68b1 | 257 | solib_map_sections (void *arg) |
c906108c SS |
258 | { |
259 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
260 | char *filename; | |
261 | char *scratch_pathname; | |
262 | int scratch_chan; | |
263 | struct section_table *p; | |
264 | struct cleanup *old_chain; | |
265 | bfd *abfd; | |
c5aa993b JM |
266 | |
267 | filename = tilde_expand (so->so_name); | |
268 | ||
b8c9b27d | 269 | old_chain = make_cleanup (xfree, filename); |
e4f7b8c8 | 270 | scratch_chan = solib_open (filename, &scratch_pathname); |
c906108c | 271 | |
c906108c SS |
272 | if (scratch_chan < 0) |
273 | { | |
13437d4b KB |
274 | perror_with_name (filename); |
275 | } | |
104c1213 | 276 | |
e4f7b8c8 | 277 | /* Leave scratch_pathname allocated. abfd->name will point to it. */ |
9f76c2cd | 278 | abfd = bfd_fopen (scratch_pathname, gnutarget, FOPEN_RB, scratch_chan); |
13437d4b | 279 | if (!abfd) |
23e04971 | 280 | { |
13437d4b | 281 | close (scratch_chan); |
8a3fe4f8 | 282 | error (_("Could not open `%s' as an executable file: %s"), |
13437d4b KB |
283 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
284 | } | |
e4f7b8c8 | 285 | |
13437d4b KB |
286 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
287 | so->abfd = abfd; | |
549c1eea | 288 | bfd_set_cacheable (abfd, 1); |
23e04971 | 289 | |
e4f7b8c8 MS |
290 | /* copy full path name into so_name, so that later symbol_file_add |
291 | can find it */ | |
13437d4b | 292 | if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE) |
8a3fe4f8 | 293 | error (_("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure.")); |
13437d4b | 294 | strcpy (so->so_name, scratch_pathname); |
23e04971 | 295 | |
13437d4b KB |
296 | if (!bfd_check_format (abfd, bfd_object)) |
297 | { | |
8a3fe4f8 | 298 | error (_("\"%s\": not in executable format: %s."), |
13437d4b | 299 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
23e04971 | 300 | } |
13437d4b | 301 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
23e04971 | 302 | { |
8a3fe4f8 | 303 | error (_("Can't find the file sections in `%s': %s"), |
13437d4b | 304 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
23e04971 | 305 | } |
104c1213 | 306 | |
13437d4b | 307 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 308 | { |
66aba65d MK |
309 | struct target_so_ops *ops = solib_ops (current_gdbarch); |
310 | ||
13437d4b KB |
311 | /* Relocate the section binding addresses as recorded in the shared |
312 | object's file by the base address to which the object was actually | |
313 | mapped. */ | |
66aba65d | 314 | ops->relocate_section_addresses (so, p); |
6314a349 | 315 | if (strcmp (p->the_bfd_section->name, ".text") == 0) |
13437d4b KB |
316 | { |
317 | so->textsection = p; | |
318 | } | |
104c1213 JM |
319 | } |
320 | ||
13437d4b KB |
321 | /* Free the file names, close the file now. */ |
322 | do_cleanups (old_chain); | |
104c1213 | 323 | |
13437d4b | 324 | return (1); |
104c1213 | 325 | } |
c906108c | 326 | |
07cd4b97 | 327 | /* LOCAL FUNCTION |
c906108c | 328 | |
07cd4b97 | 329 | free_so --- free a `struct so_list' object |
c906108c | 330 | |
c5aa993b | 331 | SYNOPSIS |
c906108c | 332 | |
07cd4b97 | 333 | void free_so (struct so_list *so) |
c906108c | 334 | |
c5aa993b | 335 | DESCRIPTION |
c906108c | 336 | |
07cd4b97 JB |
337 | Free the storage associated with the `struct so_list' object SO. |
338 | If we have opened a BFD for SO, close it. | |
c906108c | 339 | |
07cd4b97 JB |
340 | The caller is responsible for removing SO from whatever list it is |
341 | a member of. If we have placed SO's sections in some target's | |
342 | section table, the caller is responsible for removing them. | |
c906108c | 343 | |
07cd4b97 JB |
344 | This function doesn't mess with objfiles at all. If there is an |
345 | objfile associated with SO that needs to be removed, the caller is | |
346 | responsible for taking care of that. */ | |
347 | ||
13437d4b | 348 | void |
07cd4b97 | 349 | free_so (struct so_list *so) |
c906108c | 350 | { |
66aba65d | 351 | struct target_so_ops *ops = solib_ops (current_gdbarch); |
07cd4b97 | 352 | char *bfd_filename = 0; |
c5aa993b | 353 | |
07cd4b97 | 354 | if (so->sections) |
b8c9b27d | 355 | xfree (so->sections); |
07cd4b97 JB |
356 | |
357 | if (so->abfd) | |
c906108c | 358 | { |
07cd4b97 JB |
359 | bfd_filename = bfd_get_filename (so->abfd); |
360 | if (! bfd_close (so->abfd)) | |
8a3fe4f8 | 361 | warning (_("cannot close \"%s\": %s"), |
07cd4b97 | 362 | bfd_filename, bfd_errmsg (bfd_get_error ())); |
c906108c | 363 | } |
07cd4b97 JB |
364 | |
365 | if (bfd_filename) | |
b8c9b27d | 366 | xfree (bfd_filename); |
07cd4b97 | 367 | |
66aba65d | 368 | ops->free_so (so); |
07cd4b97 | 369 | |
b8c9b27d | 370 | xfree (so); |
c906108c SS |
371 | } |
372 | ||
07cd4b97 | 373 | |
f8766ec1 KB |
374 | /* Return address of first so_list entry in master shared object list. */ |
375 | struct so_list * | |
376 | master_so_list (void) | |
377 | { | |
378 | return so_list_head; | |
379 | } | |
380 | ||
381 | ||
c906108c SS |
382 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
383 | ||
384 | static int | |
4efb68b1 | 385 | symbol_add_stub (void *arg) |
c906108c | 386 | { |
52f0bd74 | 387 | struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
62557bbc | 388 | struct section_addr_info *sap; |
c906108c | 389 | |
07cd4b97 JB |
390 | /* Have we already loaded this shared object? */ |
391 | ALL_OBJFILES (so->objfile) | |
392 | { | |
393 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
394 | return 1; | |
395 | } | |
396 | ||
62557bbc KB |
397 | sap = build_section_addr_info_from_section_table (so->sections, |
398 | so->sections_end); | |
e7cf9df1 | 399 | |
62557bbc KB |
400 | so->objfile = symbol_file_add (so->so_name, so->from_tty, |
401 | sap, 0, OBJF_SHARED); | |
402 | free_section_addr_info (sap); | |
c906108c | 403 | |
07cd4b97 | 404 | return (1); |
c906108c SS |
405 | } |
406 | ||
42a6e6a0 MK |
407 | /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be |
408 | chatty about it. Return non-zero if any symbols were actually | |
409 | loaded. */ | |
410 | ||
411 | int | |
412 | solib_read_symbols (struct so_list *so, int from_tty) | |
413 | { | |
414 | if (so->symbols_loaded) | |
415 | { | |
416 | if (from_tty) | |
a3f17187 | 417 | printf_unfiltered (_("Symbols already loaded for %s\n"), so->so_name); |
42a6e6a0 | 418 | } |
8bb75286 DJ |
419 | else if (so->abfd == NULL) |
420 | { | |
421 | if (from_tty) | |
422 | printf_unfiltered (_("Symbol file not found for %s\n"), so->so_name); | |
423 | } | |
42a6e6a0 MK |
424 | else |
425 | { | |
426 | if (catch_errors (symbol_add_stub, so, | |
427 | "Error while reading shared library symbols:\n", | |
428 | RETURN_MASK_ALL)) | |
429 | { | |
430 | if (from_tty) | |
a3f17187 | 431 | printf_unfiltered (_("Loaded symbols for %s\n"), so->so_name); |
42a6e6a0 MK |
432 | so->symbols_loaded = 1; |
433 | return 1; | |
434 | } | |
435 | } | |
436 | ||
437 | return 0; | |
438 | } | |
c906108c | 439 | |
07cd4b97 | 440 | /* LOCAL FUNCTION |
c906108c | 441 | |
105b175f | 442 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 443 | |
c5aa993b | 444 | SYNOPSIS |
c906108c | 445 | |
105b175f | 446 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 447 | |
07cd4b97 | 448 | Extract the list of currently loaded shared objects from the |
105b175f JB |
449 | inferior, and compare it with the list of shared objects currently |
450 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
451 | with the inferior's new list. | |
c906108c | 452 | |
105b175f JB |
453 | If we notice that the inferior has unloaded some shared objects, |
454 | free any symbolic info GDB had read about those shared objects. | |
455 | ||
456 | Don't load symbolic info for any new shared objects; just add them | |
457 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
458 | |
459 | If FROM_TTY is non-null, feel free to print messages about what | |
460 | we're doing. | |
c906108c | 461 | |
07cd4b97 JB |
462 | If TARGET is non-null, add the sections of all new shared objects |
463 | to TARGET's section table. Note that this doesn't remove any | |
464 | sections for shared objects that have been unloaded, and it | |
465 | doesn't check to see if the new shared objects are already present in | |
466 | the section table. But we only use this for core files and | |
467 | processes we've just attached to, so that's okay. */ | |
c906108c | 468 | |
a78f21af | 469 | static void |
105b175f | 470 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 | 471 | { |
66aba65d MK |
472 | struct target_so_ops *ops = solib_ops (current_gdbarch); |
473 | struct so_list *inferior = ops->current_sos(); | |
07cd4b97 JB |
474 | struct so_list *gdb, **gdb_link; |
475 | ||
104c1213 JM |
476 | /* If we are attaching to a running process for which we |
477 | have not opened a symbol file, we may be able to get its | |
478 | symbols now! */ | |
479 | if (attach_flag && | |
480 | symfile_objfile == NULL) | |
66aba65d | 481 | catch_errors (ops->open_symbol_file_object, &from_tty, |
104c1213 JM |
482 | "Error reading attached process's symbol file.\n", |
483 | RETURN_MASK_ALL); | |
484 | ||
07cd4b97 JB |
485 | /* Since this function might actually add some elements to the |
486 | so_list_head list, arrange for it to be cleaned up when | |
487 | appropriate. */ | |
488 | if (!solib_cleanup_queued) | |
489 | { | |
490 | make_run_cleanup (do_clear_solib, NULL); | |
491 | solib_cleanup_queued = 1; | |
c906108c | 492 | } |
c5aa993b | 493 | |
07cd4b97 JB |
494 | /* GDB and the inferior's dynamic linker each maintain their own |
495 | list of currently loaded shared objects; we want to bring the | |
496 | former in sync with the latter. Scan both lists, seeing which | |
497 | shared objects appear where. There are three cases: | |
498 | ||
499 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
500 | knows about it already, and it's still loaded in the inferior. |
501 | Nothing needs to happen. | |
07cd4b97 JB |
502 | |
503 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
504 | the inferior has unloaded it. We should remove the shared |
505 | object from GDB's tables. | |
07cd4b97 JB |
506 | |
507 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
508 | means that it's just been loaded. We should add it to GDB's |
509 | tables. | |
07cd4b97 JB |
510 | |
511 | So we walk GDB's list, checking each entry to see if it appears | |
512 | in the inferior's list too. If it does, no action is needed, and | |
513 | we remove it from the inferior's list. If it doesn't, the | |
514 | inferior has unloaded it, and we remove it from GDB's list. By | |
515 | the time we're done walking GDB's list, the inferior's list | |
516 | contains only the new shared objects, which we then add. */ | |
517 | ||
518 | gdb = so_list_head; | |
519 | gdb_link = &so_list_head; | |
520 | while (gdb) | |
c906108c | 521 | { |
07cd4b97 JB |
522 | struct so_list *i = inferior; |
523 | struct so_list **i_link = &inferior; | |
524 | ||
525 | /* Check to see whether the shared object *gdb also appears in | |
526 | the inferior's current list. */ | |
527 | while (i) | |
c906108c | 528 | { |
07cd4b97 JB |
529 | if (! strcmp (gdb->so_original_name, i->so_original_name)) |
530 | break; | |
531 | ||
532 | i_link = &i->next; | |
533 | i = *i_link; | |
c906108c | 534 | } |
c5aa993b | 535 | |
07cd4b97 JB |
536 | /* If the shared object appears on the inferior's list too, then |
537 | it's still loaded, so we don't need to do anything. Delete | |
538 | it from the inferior's list, and leave it on GDB's list. */ | |
539 | if (i) | |
c906108c | 540 | { |
07cd4b97 | 541 | *i_link = i->next; |
07cd4b97 JB |
542 | free_so (i); |
543 | gdb_link = &gdb->next; | |
544 | gdb = *gdb_link; | |
545 | } | |
546 | ||
547 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
548 | else | |
549 | { | |
42a6e6a0 MK |
550 | /* Notify any observer that the shared object has been |
551 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
552 | observer_notify_solib_unloaded (gdb); |
553 | ||
07cd4b97 | 554 | *gdb_link = gdb->next; |
07cd4b97 JB |
555 | |
556 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 557 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
558 | free_objfile (gdb->objfile); |
559 | ||
560 | /* Some targets' section tables might be referring to | |
561 | sections from so->abfd; remove them. */ | |
562 | remove_target_sections (gdb->abfd); | |
563 | ||
564 | free_so (gdb); | |
565 | gdb = *gdb_link; | |
c906108c SS |
566 | } |
567 | } | |
c5aa993b | 568 | |
07cd4b97 JB |
569 | /* Now the inferior's list contains only shared objects that don't |
570 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 571 | to GDB's shared object list. */ |
07cd4b97 | 572 | if (inferior) |
c906108c | 573 | { |
07cd4b97 JB |
574 | struct so_list *i; |
575 | ||
576 | /* Add the new shared objects to GDB's list. */ | |
577 | *gdb_link = inferior; | |
578 | ||
e8930304 | 579 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 580 | for (i = inferior; i; i = i->next) |
c906108c | 581 | { |
07cd4b97 JB |
582 | i->from_tty = from_tty; |
583 | ||
584 | /* Fill in the rest of the `struct so_list' node. */ | |
585 | catch_errors (solib_map_sections, i, | |
586 | "Error while mapping shared library sections:\n", | |
587 | RETURN_MASK_ALL); | |
07cd4b97 | 588 | |
b41be06e ND |
589 | /* If requested, add the shared object's sections to the TARGET's |
590 | section table. Do this immediately after mapping the object so | |
591 | that later nodes in the list can query this object, as is needed | |
592 | in solib-osf.c. */ | |
593 | if (target) | |
c906108c | 594 | { |
b41be06e ND |
595 | int count = (i->sections_end - i->sections); |
596 | if (count > 0) | |
07cd4b97 | 597 | { |
b41be06e | 598 | int space = target_resize_to_sections (target, count); |
07cd4b97 JB |
599 | memcpy (target->to_sections + space, |
600 | i->sections, | |
601 | count * sizeof (i->sections[0])); | |
07cd4b97 | 602 | } |
c906108c | 603 | } |
42a6e6a0 MK |
604 | |
605 | /* Notify any observer that the shared object has been | |
606 | loaded now that we've added it to GDB's tables. */ | |
607 | observer_notify_solib_loaded (i); | |
c906108c | 608 | } |
e8930304 | 609 | } |
105b175f JB |
610 | } |
611 | ||
6612ad7f JB |
612 | /* Return non-zero if SO is the libpthread shared library. |
613 | ||
614 | Uses a fairly simplistic heuristic approach where we check | |
615 | the file name against "/libpthread". This can lead to false | |
616 | positives, but this should be good enough in practice. */ | |
617 | ||
618 | static int | |
619 | libpthread_solib_p (struct so_list *so) | |
620 | { | |
621 | return (strstr (so->so_name, "/libpthread") != NULL); | |
622 | } | |
105b175f JB |
623 | |
624 | /* GLOBAL FUNCTION | |
625 | ||
626 | solib_add -- read in symbol info for newly added shared libraries | |
627 | ||
628 | SYNOPSIS | |
629 | ||
990f9fe3 FF |
630 | void solib_add (char *pattern, int from_tty, struct target_ops |
631 | *TARGET, int readsyms) | |
105b175f JB |
632 | |
633 | DESCRIPTION | |
634 | ||
635 | Read in symbolic information for any shared objects whose names | |
636 | match PATTERN. (If we've already read a shared object's symbol | |
637 | info, leave it alone.) If PATTERN is zero, read them all. | |
638 | ||
990f9fe3 FF |
639 | If READSYMS is 0, defer reading symbolic information until later |
640 | but still do any needed low level processing. | |
641 | ||
105b175f JB |
642 | FROM_TTY and TARGET are as described for update_solib_list, above. */ |
643 | ||
644 | void | |
990f9fe3 | 645 | solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms) |
105b175f JB |
646 | { |
647 | struct so_list *gdb; | |
648 | ||
649 | if (pattern) | |
650 | { | |
651 | char *re_err = re_comp (pattern); | |
652 | ||
653 | if (re_err) | |
8a3fe4f8 | 654 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
655 | } |
656 | ||
657 | update_solib_list (from_tty, target); | |
c906108c | 658 | |
105b175f JB |
659 | /* Walk the list of currently loaded shared libraries, and read |
660 | symbols for any that match the pattern --- or any whose symbols | |
661 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
662 | { |
663 | int any_matches = 0; | |
664 | int loaded_any_symbols = 0; | |
c906108c | 665 | |
e8930304 JB |
666 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
667 | if (! pattern || re_exec (gdb->so_name)) | |
668 | { | |
6612ad7f JB |
669 | /* Normally, we would read the symbols from that library |
670 | only if READSYMS is set. However, we're making a small | |
671 | exception for the pthread library, because we sometimes | |
672 | need the library symbols to be loaded in order to provide | |
673 | thread support (x86-linux for instance). */ | |
674 | const int add_this_solib = | |
675 | (readsyms || libpthread_solib_p (gdb)); | |
676 | ||
e8930304 | 677 | any_matches = 1; |
6612ad7f | 678 | if (add_this_solib && solib_read_symbols (gdb, from_tty)) |
42a6e6a0 | 679 | loaded_any_symbols = 1; |
e8930304 JB |
680 | } |
681 | ||
682 | if (from_tty && pattern && ! any_matches) | |
683 | printf_unfiltered | |
684 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
685 | ||
686 | if (loaded_any_symbols) | |
687 | { | |
66aba65d MK |
688 | struct target_so_ops *ops = solib_ops (current_gdbarch); |
689 | ||
e8930304 JB |
690 | /* Getting new symbols may change our opinion about what is |
691 | frameless. */ | |
692 | reinit_frame_cache (); | |
693 | ||
66aba65d | 694 | ops->special_symbol_handling (); |
e8930304 JB |
695 | } |
696 | } | |
c906108c SS |
697 | } |
698 | ||
07cd4b97 | 699 | |
c906108c SS |
700 | /* |
701 | ||
c5aa993b | 702 | LOCAL FUNCTION |
c906108c | 703 | |
c5aa993b | 704 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 705 | |
c5aa993b | 706 | SYNOPSIS |
c906108c | 707 | |
c5aa993b | 708 | static void info_sharedlibrary_command () |
c906108c | 709 | |
c5aa993b | 710 | DESCRIPTION |
c906108c | 711 | |
c5aa993b JM |
712 | Walk through the shared library list and print information |
713 | about each attached library. | |
714 | */ | |
c906108c SS |
715 | |
716 | static void | |
fba45db2 | 717 | info_sharedlibrary_command (char *ignore, int from_tty) |
c906108c | 718 | { |
52f0bd74 | 719 | struct so_list *so = NULL; /* link map state variable */ |
c906108c SS |
720 | int header_done = 0; |
721 | int addr_width; | |
c906108c | 722 | |
84eb3c4f DJ |
723 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
724 | addr_width = 4 + (TARGET_PTR_BIT / 4); | |
c906108c | 725 | |
105b175f | 726 | update_solib_list (from_tty, 0); |
07cd4b97 JB |
727 | |
728 | for (so = so_list_head; so; so = so->next) | |
c906108c | 729 | { |
c5aa993b | 730 | if (so->so_name[0]) |
c906108c SS |
731 | { |
732 | if (!header_done) | |
733 | { | |
c5aa993b JM |
734 | printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
735 | addr_width, "To", "Syms Read", | |
736 | "Shared Object Library"); | |
c906108c SS |
737 | header_done++; |
738 | } | |
739 | ||
740 | printf_unfiltered ("%-*s", addr_width, | |
749499cb | 741 | so->textsection != NULL |
bb599908 | 742 | ? hex_string_custom ( |
a43ad351 | 743 | (LONGEST) so->textsection->addr, |
bb599908 | 744 | addr_width - 4) |
749499cb | 745 | : ""); |
c906108c | 746 | printf_unfiltered ("%-*s", addr_width, |
749499cb | 747 | so->textsection != NULL |
bb599908 | 748 | ? hex_string_custom ( |
a43ad351 | 749 | (LONGEST) so->textsection->endaddr, |
bb599908 | 750 | addr_width - 4) |
749499cb | 751 | : ""); |
c5aa993b JM |
752 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); |
753 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
754 | } |
755 | } | |
756 | if (so_list_head == NULL) | |
757 | { | |
a3f17187 | 758 | printf_unfiltered (_("No shared libraries loaded at this time.\n")); |
c906108c SS |
759 | } |
760 | } | |
761 | ||
762 | /* | |
763 | ||
c5aa993b | 764 | GLOBAL FUNCTION |
c906108c | 765 | |
c5aa993b | 766 | solib_address -- check to see if an address is in a shared lib |
c906108c | 767 | |
c5aa993b | 768 | SYNOPSIS |
c906108c | 769 | |
c5aa993b | 770 | char * solib_address (CORE_ADDR address) |
c906108c | 771 | |
c5aa993b | 772 | DESCRIPTION |
c906108c | 773 | |
c5aa993b JM |
774 | Provides a hook for other gdb routines to discover whether or |
775 | not a particular address is within the mapped address space of | |
749499cb | 776 | a shared library. |
c906108c | 777 | |
c5aa993b JM |
778 | For example, this routine is called at one point to disable |
779 | breakpoints which are in shared libraries that are not currently | |
780 | mapped in. | |
c906108c SS |
781 | */ |
782 | ||
783 | char * | |
fba45db2 | 784 | solib_address (CORE_ADDR address) |
c906108c | 785 | { |
52f0bd74 | 786 | struct so_list *so = 0; /* link map state variable */ |
c5aa993b | 787 | |
07cd4b97 | 788 | for (so = so_list_head; so; so = so->next) |
c906108c | 789 | { |
749499cb KB |
790 | struct section_table *p; |
791 | ||
792 | for (p = so->sections; p < so->sections_end; p++) | |
793 | { | |
794 | if (p->addr <= address && address < p->endaddr) | |
795 | return (so->so_name); | |
796 | } | |
c906108c | 797 | } |
07cd4b97 | 798 | |
c906108c SS |
799 | return (0); |
800 | } | |
801 | ||
802 | /* Called by free_all_symtabs */ | |
803 | ||
c5aa993b | 804 | void |
fba45db2 | 805 | clear_solib (void) |
c906108c | 806 | { |
66aba65d MK |
807 | struct target_so_ops *ops = solib_ops (current_gdbarch); |
808 | ||
085dd6e6 JM |
809 | /* This function is expected to handle ELF shared libraries. It is |
810 | also used on Solaris, which can run either ELF or a.out binaries | |
811 | (for compatibility with SunOS 4), both of which can use shared | |
812 | libraries. So we don't know whether we have an ELF executable or | |
813 | an a.out executable until the user chooses an executable file. | |
814 | ||
815 | ELF shared libraries don't get mapped into the address space | |
816 | until after the program starts, so we'd better not try to insert | |
817 | breakpoints in them immediately. We have to wait until the | |
818 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
819 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
820 | it's ready. | |
821 | ||
822 | SunOS shared libraries seem to be different --- they're present | |
823 | as soon as the process begins execution, so there's no need to | |
824 | put off inserting breakpoints. There's also nowhere to put a | |
825 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
826 | around to it. | |
827 | ||
828 | So: disable breakpoints only if we're using ELF shared libs. */ | |
829 | if (exec_bfd != NULL | |
830 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
831 | disable_breakpoints_in_shlibs (1); | |
832 | ||
c906108c SS |
833 | while (so_list_head) |
834 | { | |
07cd4b97 JB |
835 | struct so_list *so = so_list_head; |
836 | so_list_head = so->next; | |
2069d78d KB |
837 | if (so->abfd) |
838 | remove_target_sections (so->abfd); | |
07cd4b97 | 839 | free_so (so); |
c906108c | 840 | } |
07cd4b97 | 841 | |
66aba65d | 842 | ops->clear_solib (); |
c906108c SS |
843 | } |
844 | ||
845 | static void | |
4efb68b1 | 846 | do_clear_solib (void *dummy) |
c906108c SS |
847 | { |
848 | solib_cleanup_queued = 0; | |
849 | clear_solib (); | |
850 | } | |
851 | ||
13437d4b | 852 | /* GLOBAL FUNCTION |
c5aa993b JM |
853 | |
854 | solib_create_inferior_hook -- shared library startup support | |
855 | ||
856 | SYNOPSIS | |
857 | ||
7095b863 | 858 | void solib_create_inferior_hook () |
c5aa993b JM |
859 | |
860 | DESCRIPTION | |
861 | ||
862 | When gdb starts up the inferior, it nurses it along (through the | |
863 | shell) until it is ready to execute it's first instruction. At this | |
864 | point, this function gets called via expansion of the macro | |
13437d4b | 865 | SOLIB_CREATE_INFERIOR_HOOK. */ |
c5aa993b JM |
866 | |
867 | void | |
fba45db2 | 868 | solib_create_inferior_hook (void) |
c906108c | 869 | { |
66aba65d MK |
870 | struct target_so_ops *ops = solib_ops (current_gdbarch); |
871 | ops->solib_create_inferior_hook(); | |
c906108c SS |
872 | } |
873 | ||
d7fa2ae2 KB |
874 | /* GLOBAL FUNCTION |
875 | ||
876 | in_solib_dynsym_resolve_code -- check to see if an address is in | |
877 | dynamic loader's dynamic symbol | |
878 | resolution code | |
879 | ||
880 | SYNOPSIS | |
881 | ||
882 | int in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
883 | ||
884 | DESCRIPTION | |
885 | ||
886 | Determine if PC is in the dynamic linker's symbol resolution | |
887 | code. Return 1 if so, 0 otherwise. | |
888 | */ | |
889 | ||
890 | int | |
891 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
892 | { | |
66aba65d MK |
893 | struct target_so_ops *ops = solib_ops (current_gdbarch); |
894 | return ops->in_dynsym_resolve_code (pc); | |
d7fa2ae2 | 895 | } |
c906108c SS |
896 | |
897 | /* | |
898 | ||
c5aa993b | 899 | LOCAL FUNCTION |
c906108c | 900 | |
c5aa993b | 901 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 902 | |
c5aa993b | 903 | SYNOPSIS |
c906108c | 904 | |
c5aa993b | 905 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 906 | |
c5aa993b | 907 | DESCRIPTION |
c906108c | 908 | |
c5aa993b | 909 | */ |
c906108c SS |
910 | |
911 | static void | |
fba45db2 | 912 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
913 | { |
914 | dont_repeat (); | |
990f9fe3 | 915 | solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
916 | } |
917 | ||
cb0ba49e MS |
918 | /* LOCAL FUNCTION |
919 | ||
920 | no_shared_libraries -- handle command to explicitly discard symbols | |
921 | from shared libraries. | |
922 | ||
923 | DESCRIPTION | |
924 | ||
925 | Implements the command "nosharedlibrary", which discards symbols | |
926 | that have been auto-loaded from shared libraries. Symbols from | |
927 | shared libraries that were added by explicit request of the user | |
928 | are not discarded. Also called from remote.c. */ | |
929 | ||
c60a7562 MS |
930 | void |
931 | no_shared_libraries (char *ignored, int from_tty) | |
932 | { | |
933 | objfile_purge_solibs (); | |
934 | do_clear_solib (NULL); | |
935 | } | |
c906108c | 936 | |
cf466558 | 937 | static void |
f397e303 AC |
938 | reload_shared_libraries (char *ignored, int from_tty, |
939 | struct cmd_list_element *e) | |
cf466558 KB |
940 | { |
941 | no_shared_libraries (NULL, from_tty); | |
942 | solib_add (NULL, from_tty, NULL, auto_solib_add); | |
943 | } | |
944 | ||
920d2a44 AC |
945 | static void |
946 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
947 | struct cmd_list_element *c, const char *value) | |
948 | { | |
949 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
950 | value); | |
951 | } | |
952 | ||
953 | ||
a78f21af AC |
954 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
955 | ||
c906108c | 956 | void |
fba45db2 | 957 | _initialize_solib (void) |
c906108c | 958 | { |
fa58ee11 EZ |
959 | struct cmd_list_element *c; |
960 | ||
66aba65d MK |
961 | solib_data = gdbarch_data_register_pre_init (solib_init); |
962 | ||
c906108c | 963 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 964 | _("Load shared object library symbols for files matching REGEXP.")); |
c5aa993b | 965 | add_info ("sharedlibrary", info_sharedlibrary_command, |
1bedd215 | 966 | _("Status of loaded shared object libraries.")); |
c60a7562 | 967 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 968 | _("Unload all shared object library symbols.")); |
c906108c | 969 | |
5bf193a2 AC |
970 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
971 | &auto_solib_add, _("\ | |
972 | Set autoloading of shared library symbols."), _("\ | |
973 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
974 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
975 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
976 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
5bf193a2 AC |
977 | inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."), |
978 | NULL, | |
920d2a44 | 979 | show_auto_solib_add, |
5bf193a2 | 980 | &setlist, &showlist); |
c906108c | 981 | |
f397e303 AC |
982 | add_setshow_filename_cmd ("solib-absolute-prefix", class_support, |
983 | &solib_absolute_prefix, _("\ | |
984 | Set prefix for loading absolute shared library symbol files."), _("\ | |
985 | Show prefix for loading absolute shared library symbol files."), _("\ | |
986 | For other (relative) files, you can add values using `set solib-search-path'."), | |
987 | reload_shared_libraries, | |
988 | NULL, | |
989 | &setlist, &showlist); | |
c906108c | 990 | |
030292b7 DJ |
991 | /* Set the default value of "solib-absolute-prefix" from the sysroot, if |
992 | one is set. */ | |
993 | solib_absolute_prefix = xstrdup (gdb_sysroot); | |
994 | ||
525226b5 AC |
995 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
996 | &solib_search_path, _("\ | |
997 | Set the search path for loading non-absolute shared library symbol files."), _("\ | |
998 | Show the search path for loading non-absolute shared library symbol files."), _("\ | |
999 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."), | |
1000 | reload_shared_libraries, | |
920d2a44 | 1001 | show_solib_search_path, |
525226b5 | 1002 | &setlist, &showlist); |
c906108c | 1003 | } |