Commit | Line | Data |
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13437d4b | 1 | /* Handle shared libraries for GDB, the GNU Debugger. |
14a5e767 | 2 | |
6aba47ca | 3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
4c38e0a4 | 4 | 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010 |
9b254dd1 | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 21 | |
c906108c SS |
22 | #include "defs.h" |
23 | ||
c906108c | 24 | #include <sys/types.h> |
c906108c | 25 | #include <fcntl.h> |
13437d4b | 26 | #include "gdb_string.h" |
c906108c SS |
27 | #include "symtab.h" |
28 | #include "bfd.h" | |
29 | #include "symfile.h" | |
30 | #include "objfiles.h" | |
60250e8b | 31 | #include "exceptions.h" |
c906108c SS |
32 | #include "gdbcore.h" |
33 | #include "command.h" | |
34 | #include "target.h" | |
35 | #include "frame.h" | |
88987551 | 36 | #include "gdb_regex.h" |
c906108c SS |
37 | #include "inferior.h" |
38 | #include "environ.h" | |
39 | #include "language.h" | |
40 | #include "gdbcmd.h" | |
fa58ee11 | 41 | #include "completer.h" |
fe4e3eb8 | 42 | #include "filenames.h" /* for DOSish file names */ |
4646aa9d | 43 | #include "exec.h" |
13437d4b | 44 | #include "solist.h" |
84acb35a | 45 | #include "observer.h" |
dbda9972 | 46 | #include "readline/readline.h" |
f1838a98 | 47 | #include "remote.h" |
2c0b251b | 48 | #include "solib.h" |
55333a84 | 49 | #include "interps.h" |
c906108c | 50 | |
66aba65d MK |
51 | /* Architecture-specific operations. */ |
52 | ||
53 | /* Per-architecture data key. */ | |
54 | static struct gdbarch_data *solib_data; | |
55 | ||
56 | static void * | |
57 | solib_init (struct obstack *obstack) | |
58 | { | |
59 | struct target_so_ops **ops; | |
60 | ||
61 | ops = OBSTACK_ZALLOC (obstack, struct target_so_ops *); | |
62 | *ops = current_target_so_ops; | |
63 | return ops; | |
64 | } | |
65 | ||
66 | static struct target_so_ops * | |
67 | solib_ops (struct gdbarch *gdbarch) | |
68 | { | |
69 | struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data); | |
70 | return *ops; | |
71 | } | |
7d522c90 DJ |
72 | |
73 | /* Set the solib operations for GDBARCH to NEW_OPS. */ | |
74 | ||
75 | void | |
76 | set_solib_ops (struct gdbarch *gdbarch, struct target_so_ops *new_ops) | |
77 | { | |
78 | struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data); | |
79 | *ops = new_ops; | |
80 | } | |
66aba65d MK |
81 | \f |
82 | ||
13437d4b | 83 | /* external data declarations */ |
c906108c | 84 | |
7d522c90 DJ |
85 | /* FIXME: gdbarch needs to control this variable, or else every |
86 | configuration needs to call set_solib_ops. */ | |
13437d4b | 87 | struct target_so_ops *current_target_so_ops; |
23e04971 | 88 | |
6c95b8df PA |
89 | /* List of known shared objects */ |
90 | #define so_list_head current_program_space->so_list | |
23e04971 | 91 | |
c906108c SS |
92 | /* Local function prototypes */ |
93 | ||
c906108c SS |
94 | /* If non-empty, this is a search path for loading non-absolute shared library |
95 | symbol files. This takes precedence over the environment variables PATH | |
96 | and LD_LIBRARY_PATH. */ | |
97 | static char *solib_search_path = NULL; | |
920d2a44 AC |
98 | static void |
99 | show_solib_search_path (struct ui_file *file, int from_tty, | |
100 | struct cmd_list_element *c, const char *value) | |
101 | { | |
102 | fprintf_filtered (file, _("\ | |
103 | The search path for loading non-absolute shared library symbol files is %s.\n"), | |
104 | value); | |
105 | } | |
c906108c | 106 | |
e4f7b8c8 MS |
107 | /* |
108 | ||
109 | GLOBAL FUNCTION | |
110 | ||
572d275c | 111 | solib_find -- Find a shared library file. |
e4f7b8c8 MS |
112 | |
113 | SYNOPSIS | |
114 | ||
572d275c | 115 | char *solib_find (char *in_pathname, int *fd); |
e4f7b8c8 MS |
116 | |
117 | DESCRIPTION | |
118 | ||
f822c95b | 119 | Global variable GDB_SYSROOT is used as a prefix directory |
e4f7b8c8 MS |
120 | to search for shared libraries if they have an absolute path. |
121 | ||
122 | Global variable SOLIB_SEARCH_PATH is used as a prefix directory | |
123 | (or set of directories, as in LD_LIBRARY_PATH) to search for all | |
f822c95b | 124 | shared libraries if not found in GDB_SYSROOT. |
e4f7b8c8 | 125 | |
c8c18e65 | 126 | Search algorithm: |
f822c95b DJ |
127 | * If there is a gdb_sysroot and path is absolute: |
128 | * Search for gdb_sysroot/path. | |
c8c18e65 KW |
129 | * else |
130 | * Look for it literally (unmodified). | |
e4f7b8c8 | 131 | * Look in SOLIB_SEARCH_PATH. |
f43caff8 | 132 | * If available, use target defined search function. |
f822c95b | 133 | * If gdb_sysroot is NOT set, perform the following two searches: |
c8c18e65 KW |
134 | * Look in inferior's $PATH. |
135 | * Look in inferior's $LD_LIBRARY_PATH. | |
136 | * | |
137 | * The last check avoids doing this search when targetting remote | |
f822c95b | 138 | * machines since gdb_sysroot will almost always be set. |
e4f7b8c8 MS |
139 | |
140 | RETURNS | |
b21f0843 | 141 | |
572d275c UW |
142 | Full pathname of the shared library file, or NULL if not found. |
143 | (The pathname is malloc'ed; it needs to be freed by the caller.) | |
144 | *FD is set to either -1 or an open file handle for the library. */ | |
e4f7b8c8 | 145 | |
572d275c UW |
146 | char * |
147 | solib_find (char *in_pathname, int *fd) | |
e4f7b8c8 | 148 | { |
1cf3db46 | 149 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
e4f7b8c8 MS |
150 | int found_file = -1; |
151 | char *temp_pathname = NULL; | |
f822c95b | 152 | int gdb_sysroot_is_empty; |
08105857 PA |
153 | const char *solib_symbols_extension |
154 | = gdbarch_solib_symbols_extension (target_gdbarch); | |
155 | ||
156 | /* If solib_symbols_extension is set, replace the file's | |
157 | extension. */ | |
158 | if (solib_symbols_extension) | |
159 | { | |
160 | char *p = in_pathname + strlen (in_pathname); | |
161 | while (p > in_pathname && *p != '.') | |
162 | p--; | |
163 | ||
164 | if (*p == '.') | |
165 | { | |
166 | char *new_pathname; | |
167 | ||
168 | new_pathname = alloca (p - in_pathname + 1 | |
169 | + strlen (solib_symbols_extension) + 1); | |
170 | memcpy (new_pathname, in_pathname, p - in_pathname + 1); | |
171 | strcpy (new_pathname + (p - in_pathname) + 1, | |
172 | solib_symbols_extension); | |
173 | ||
174 | in_pathname = new_pathname; | |
175 | } | |
176 | } | |
58dc52c3 | 177 | |
f822c95b | 178 | gdb_sysroot_is_empty = (gdb_sysroot == NULL || *gdb_sysroot == 0); |
e4f7b8c8 | 179 | |
f822c95b | 180 | if (! IS_ABSOLUTE_PATH (in_pathname) || gdb_sysroot_is_empty) |
f1d10cfb AS |
181 | temp_pathname = in_pathname; |
182 | else | |
e4f7b8c8 | 183 | { |
f822c95b | 184 | int prefix_len = strlen (gdb_sysroot); |
f1d10cfb AS |
185 | |
186 | /* Remove trailing slashes from absolute prefix. */ | |
187 | while (prefix_len > 0 | |
f822c95b | 188 | && IS_DIR_SEPARATOR (gdb_sysroot[prefix_len - 1])) |
f1d10cfb AS |
189 | prefix_len--; |
190 | ||
191 | /* Cat the prefixed pathname together. */ | |
192 | temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1); | |
f822c95b | 193 | strncpy (temp_pathname, gdb_sysroot, prefix_len); |
f1d10cfb AS |
194 | temp_pathname[prefix_len] = '\0'; |
195 | strcat (temp_pathname, in_pathname); | |
e4f7b8c8 MS |
196 | } |
197 | ||
f1838a98 UW |
198 | /* Handle remote files. */ |
199 | if (remote_filename_p (temp_pathname)) | |
200 | { | |
572d275c UW |
201 | *fd = -1; |
202 | return xstrdup (temp_pathname); | |
f1838a98 UW |
203 | } |
204 | ||
f1d10cfb AS |
205 | /* Now see if we can open it. */ |
206 | found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0); | |
207 | ||
0997b535 MS |
208 | /* We try to find the library in various ways. After each attempt |
209 | (except for the one above), either found_file >= 0 and | |
210 | temp_pathname is a malloc'd string, or found_file < 0 and | |
211 | temp_pathname does not point to storage that needs to be | |
212 | freed. */ | |
213 | ||
214 | if (found_file < 0) | |
215 | temp_pathname = NULL; | |
216 | else | |
217 | temp_pathname = xstrdup (temp_pathname); | |
218 | ||
f822c95b | 219 | /* If the search in gdb_sysroot failed, and the path name is |
ba5f0d88 OF |
220 | absolute at this point, make it relative. (openp will try and open the |
221 | file according to its absolute path otherwise, which is not what we want.) | |
222 | Affects subsequent searches for this solib. */ | |
223 | if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname)) | |
224 | { | |
225 | /* First, get rid of any drive letters etc. */ | |
226 | while (!IS_DIR_SEPARATOR (*in_pathname)) | |
227 | in_pathname++; | |
228 | ||
229 | /* Next, get rid of all leading dir separators. */ | |
230 | while (IS_DIR_SEPARATOR (*in_pathname)) | |
231 | in_pathname++; | |
232 | } | |
233 | ||
c8c18e65 | 234 | /* If not found, search the solib_search_path (if any). */ |
e4f7b8c8 | 235 | if (found_file < 0 && solib_search_path != NULL) |
014d698b | 236 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
fbdebf46 | 237 | in_pathname, O_RDONLY | O_BINARY, &temp_pathname); |
ba5f0d88 OF |
238 | |
239 | /* If not found, next search the solib_search_path (if any) for the basename | |
240 | only (ignoring the path). This is to allow reading solibs from a path | |
241 | that differs from the opened path. */ | |
242 | if (found_file < 0 && solib_search_path != NULL) | |
014d698b | 243 | found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST, |
fbdebf46 | 244 | lbasename (in_pathname), O_RDONLY | O_BINARY, |
ba5f0d88 | 245 | &temp_pathname); |
e4f7b8c8 | 246 | |
2610b0bf | 247 | /* If not found, try to use target supplied solib search method */ |
66aba65d | 248 | if (found_file < 0 && ops->find_and_open_solib) |
637d6690 | 249 | found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY, |
66aba65d | 250 | &temp_pathname); |
2610b0bf | 251 | |
e4f7b8c8 | 252 | /* If not found, next search the inferior's $PATH environment variable. */ |
f822c95b | 253 | if (found_file < 0 && gdb_sysroot_is_empty) |
3f81c18a VP |
254 | found_file = openp (get_in_environ (current_inferior ()->environment, |
255 | "PATH"), | |
fbdebf46 | 256 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, |
014d698b | 257 | &temp_pathname); |
e4f7b8c8 MS |
258 | |
259 | /* If not found, next search the inferior's $LD_LIBRARY_PATH | |
260 | environment variable. */ | |
f822c95b | 261 | if (found_file < 0 && gdb_sysroot_is_empty) |
3f81c18a VP |
262 | found_file = openp (get_in_environ (current_inferior ()->environment, |
263 | "LD_LIBRARY_PATH"), | |
fbdebf46 | 264 | OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, |
014d698b | 265 | &temp_pathname); |
e4f7b8c8 | 266 | |
572d275c UW |
267 | *fd = found_file; |
268 | return temp_pathname; | |
269 | } | |
270 | ||
271 | /* Open and return a BFD for the shared library PATHNAME. If FD is not -1, | |
272 | it is used as file handle to open the file. Throws an error if the file | |
273 | could not be opened. Handles both local and remote file access. | |
274 | ||
275 | PATHNAME must be malloc'ed by the caller. If successful, the new BFD's | |
276 | name will point to it. If unsuccessful, PATHNAME will be freed and the | |
277 | FD will be closed (unless FD was -1). */ | |
278 | ||
279 | bfd * | |
280 | solib_bfd_fopen (char *pathname, int fd) | |
281 | { | |
282 | bfd *abfd; | |
283 | ||
284 | if (remote_filename_p (pathname)) | |
285 | { | |
286 | gdb_assert (fd == -1); | |
287 | abfd = remote_bfd_open (pathname, gnutarget); | |
288 | } | |
289 | else | |
290 | { | |
291 | abfd = bfd_fopen (pathname, gnutarget, FOPEN_RB, fd); | |
292 | ||
293 | if (abfd) | |
294 | bfd_set_cacheable (abfd, 1); | |
295 | else if (fd != -1) | |
296 | close (fd); | |
297 | } | |
f1838a98 | 298 | |
f1838a98 UW |
299 | if (!abfd) |
300 | { | |
572d275c | 301 | make_cleanup (xfree, pathname); |
f1838a98 | 302 | error (_("Could not open `%s' as an executable file: %s"), |
572d275c | 303 | pathname, bfd_errmsg (bfd_get_error ())); |
f1838a98 UW |
304 | } |
305 | ||
572d275c UW |
306 | return abfd; |
307 | } | |
308 | ||
309 | /* Find shared library PATHNAME and open a BFD for it. */ | |
310 | ||
311 | bfd * | |
312 | solib_bfd_open (char *pathname) | |
313 | { | |
572d275c UW |
314 | char *found_pathname; |
315 | int found_file; | |
316 | bfd *abfd; | |
378d2b72 | 317 | const struct bfd_arch_info *b; |
572d275c | 318 | |
572d275c UW |
319 | /* Search for shared library file. */ |
320 | found_pathname = solib_find (pathname, &found_file); | |
321 | if (found_pathname == NULL) | |
322 | perror_with_name (pathname); | |
323 | ||
324 | /* Open bfd for shared library. */ | |
325 | abfd = solib_bfd_fopen (found_pathname, found_file); | |
326 | ||
327 | /* Check bfd format. */ | |
f1838a98 | 328 | if (!bfd_check_format (abfd, bfd_object)) |
0997b535 | 329 | { |
f1838a98 | 330 | bfd_close (abfd); |
572d275c | 331 | make_cleanup (xfree, found_pathname); |
f1838a98 | 332 | error (_("`%s': not in executable format: %s"), |
572d275c | 333 | found_pathname, bfd_errmsg (bfd_get_error ())); |
0997b535 | 334 | } |
f1838a98 | 335 | |
378d2b72 HZ |
336 | /* Check bfd arch. */ |
337 | b = gdbarch_bfd_arch_info (target_gdbarch); | |
69e2bf17 | 338 | if (!b->compatible (b, bfd_get_arch_info (abfd))) |
378d2b72 HZ |
339 | warning (_("`%s': Shared library architecture %s is not compatible " |
340 | "with target architecture %s."), found_pathname, | |
341 | bfd_get_arch_info (abfd)->printable_name, b->printable_name); | |
342 | ||
f1838a98 | 343 | return abfd; |
e4f7b8c8 MS |
344 | } |
345 | ||
346 | ||
c906108c SS |
347 | /* |
348 | ||
c5aa993b | 349 | LOCAL FUNCTION |
c906108c | 350 | |
c5aa993b | 351 | solib_map_sections -- open bfd and build sections for shared lib |
c906108c | 352 | |
c5aa993b | 353 | SYNOPSIS |
c906108c | 354 | |
c5aa993b | 355 | static int solib_map_sections (struct so_list *so) |
c906108c | 356 | |
c5aa993b | 357 | DESCRIPTION |
c906108c | 358 | |
c5aa993b JM |
359 | Given a pointer to one of the shared objects in our list |
360 | of mapped objects, use the recorded name to open a bfd | |
361 | descriptor for the object, build a section table, and then | |
362 | relocate all the section addresses by the base address at | |
363 | which the shared object was mapped. | |
c906108c | 364 | |
c5aa993b | 365 | FIXMES |
c906108c | 366 | |
c5aa993b JM |
367 | In most (all?) cases the shared object file name recorded in the |
368 | dynamic linkage tables will be a fully qualified pathname. For | |
369 | cases where it isn't, do we really mimic the systems search | |
370 | mechanism correctly in the below code (particularly the tilde | |
371 | expansion stuff?). | |
c906108c SS |
372 | */ |
373 | ||
374 | static int | |
4efb68b1 | 375 | solib_map_sections (void *arg) |
c906108c SS |
376 | { |
377 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
831a0c44 | 378 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
c906108c | 379 | char *filename; |
0542c86d | 380 | struct target_section *p; |
c906108c SS |
381 | struct cleanup *old_chain; |
382 | bfd *abfd; | |
c5aa993b JM |
383 | |
384 | filename = tilde_expand (so->so_name); | |
b8c9b27d | 385 | old_chain = make_cleanup (xfree, filename); |
831a0c44 | 386 | abfd = ops->bfd_open (filename); |
f1838a98 | 387 | do_cleanups (old_chain); |
e4f7b8c8 | 388 | |
13437d4b | 389 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
3db741ef | 390 | so->abfd = gdb_bfd_ref (abfd); |
23e04971 | 391 | |
e4f7b8c8 MS |
392 | /* copy full path name into so_name, so that later symbol_file_add |
393 | can find it */ | |
f1838a98 UW |
394 | if (strlen (bfd_get_filename (abfd)) >= SO_NAME_MAX_PATH_SIZE) |
395 | error (_("Shared library file name is too long.")); | |
396 | strcpy (so->so_name, bfd_get_filename (abfd)); | |
23e04971 | 397 | |
13437d4b | 398 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
23e04971 | 399 | { |
8a3fe4f8 | 400 | error (_("Can't find the file sections in `%s': %s"), |
13437d4b | 401 | bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
23e04971 | 402 | } |
104c1213 | 403 | |
13437d4b | 404 | for (p = so->sections; p < so->sections_end; p++) |
104c1213 | 405 | { |
13437d4b KB |
406 | /* Relocate the section binding addresses as recorded in the shared |
407 | object's file by the base address to which the object was actually | |
408 | mapped. */ | |
66aba65d | 409 | ops->relocate_section_addresses (so, p); |
cfa9d6d9 DJ |
410 | |
411 | /* If the target didn't provide information about the address | |
412 | range of the shared object, assume we want the location of | |
413 | the .text section. */ | |
414 | if (so->addr_low == 0 && so->addr_high == 0 | |
415 | && strcmp (p->the_bfd_section->name, ".text") == 0) | |
13437d4b | 416 | { |
cfa9d6d9 DJ |
417 | so->addr_low = p->addr; |
418 | so->addr_high = p->endaddr; | |
13437d4b | 419 | } |
104c1213 JM |
420 | } |
421 | ||
13437d4b | 422 | return (1); |
104c1213 | 423 | } |
c906108c | 424 | |
07cd4b97 | 425 | /* LOCAL FUNCTION |
c906108c | 426 | |
07cd4b97 | 427 | free_so --- free a `struct so_list' object |
c906108c | 428 | |
c5aa993b | 429 | SYNOPSIS |
c906108c | 430 | |
07cd4b97 | 431 | void free_so (struct so_list *so) |
c906108c | 432 | |
c5aa993b | 433 | DESCRIPTION |
c906108c | 434 | |
07cd4b97 JB |
435 | Free the storage associated with the `struct so_list' object SO. |
436 | If we have opened a BFD for SO, close it. | |
c906108c | 437 | |
07cd4b97 JB |
438 | The caller is responsible for removing SO from whatever list it is |
439 | a member of. If we have placed SO's sections in some target's | |
440 | section table, the caller is responsible for removing them. | |
c906108c | 441 | |
07cd4b97 JB |
442 | This function doesn't mess with objfiles at all. If there is an |
443 | objfile associated with SO that needs to be removed, the caller is | |
444 | responsible for taking care of that. */ | |
445 | ||
13437d4b | 446 | void |
07cd4b97 | 447 | free_so (struct so_list *so) |
c906108c | 448 | { |
1cf3db46 | 449 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
c5aa993b | 450 | |
07cd4b97 | 451 | if (so->sections) |
b8c9b27d | 452 | xfree (so->sections); |
07cd4b97 | 453 | |
e3c69974 | 454 | gdb_bfd_unref (so->abfd); |
07cd4b97 | 455 | |
66aba65d | 456 | ops->free_so (so); |
07cd4b97 | 457 | |
b8c9b27d | 458 | xfree (so); |
c906108c SS |
459 | } |
460 | ||
07cd4b97 | 461 | |
f8766ec1 KB |
462 | /* Return address of first so_list entry in master shared object list. */ |
463 | struct so_list * | |
464 | master_so_list (void) | |
465 | { | |
466 | return so_list_head; | |
467 | } | |
468 | ||
7eedccfa PP |
469 | static void |
470 | symbol_add_stub (struct so_list *so, int flags) | |
c906108c | 471 | { |
62557bbc | 472 | struct section_addr_info *sap; |
c906108c | 473 | |
07cd4b97 JB |
474 | /* Have we already loaded this shared object? */ |
475 | ALL_OBJFILES (so->objfile) | |
476 | { | |
477 | if (strcmp (so->objfile->name, so->so_name) == 0) | |
7eedccfa | 478 | return; |
07cd4b97 JB |
479 | } |
480 | ||
62557bbc KB |
481 | sap = build_section_addr_info_from_section_table (so->sections, |
482 | so->sections_end); | |
e7cf9df1 | 483 | |
e3c69974 | 484 | so->objfile = symbol_file_add_from_bfd (so->abfd, flags, sap, OBJF_SHARED); |
62557bbc | 485 | free_section_addr_info (sap); |
c906108c | 486 | |
7eedccfa | 487 | return; |
c906108c SS |
488 | } |
489 | ||
7eedccfa PP |
490 | /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS, |
491 | be chatty about it. Return non-zero if any symbols were actually | |
42a6e6a0 MK |
492 | loaded. */ |
493 | ||
494 | int | |
7eedccfa | 495 | solib_read_symbols (struct so_list *so, int flags) |
42a6e6a0 | 496 | { |
7eedccfa PP |
497 | const int from_tty = flags & SYMFILE_VERBOSE; |
498 | ||
42a6e6a0 MK |
499 | if (so->symbols_loaded) |
500 | { | |
55333a84 | 501 | if (from_tty || info_verbose) |
a3f17187 | 502 | printf_unfiltered (_("Symbols already loaded for %s\n"), so->so_name); |
42a6e6a0 | 503 | } |
8bb75286 DJ |
504 | else if (so->abfd == NULL) |
505 | { | |
55333a84 | 506 | if (from_tty || info_verbose) |
8bb75286 DJ |
507 | printf_unfiltered (_("Symbol file not found for %s\n"), so->so_name); |
508 | } | |
42a6e6a0 MK |
509 | else |
510 | { | |
7eedccfa PP |
511 | volatile struct gdb_exception exception; |
512 | TRY_CATCH (exception, RETURN_MASK_ALL) | |
513 | { | |
514 | symbol_add_stub (so, flags); | |
515 | } | |
516 | if (exception.reason != 0) | |
517 | { | |
518 | exception_fprintf (gdb_stderr, exception, | |
519 | "Error while reading shared library symbols:\n"); | |
520 | return 0; | |
521 | } | |
55333a84 | 522 | if (from_tty || info_verbose) |
7eedccfa PP |
523 | printf_unfiltered (_("Loaded symbols for %s\n"), so->so_name); |
524 | so->symbols_loaded = 1; | |
525 | return 1; | |
42a6e6a0 MK |
526 | } |
527 | ||
528 | return 0; | |
529 | } | |
c906108c | 530 | |
07cd4b97 | 531 | /* LOCAL FUNCTION |
c906108c | 532 | |
105b175f | 533 | update_solib_list --- synchronize GDB's shared object list with inferior's |
c906108c | 534 | |
c5aa993b | 535 | SYNOPSIS |
c906108c | 536 | |
105b175f | 537 | void update_solib_list (int from_tty, struct target_ops *TARGET) |
c906108c | 538 | |
07cd4b97 | 539 | Extract the list of currently loaded shared objects from the |
105b175f JB |
540 | inferior, and compare it with the list of shared objects currently |
541 | in GDB's so_list_head list. Edit so_list_head to bring it in sync | |
542 | with the inferior's new list. | |
c906108c | 543 | |
105b175f JB |
544 | If we notice that the inferior has unloaded some shared objects, |
545 | free any symbolic info GDB had read about those shared objects. | |
546 | ||
547 | Don't load symbolic info for any new shared objects; just add them | |
548 | to the list, and leave their symbols_loaded flag clear. | |
07cd4b97 JB |
549 | |
550 | If FROM_TTY is non-null, feel free to print messages about what | |
551 | we're doing. | |
c906108c | 552 | |
07cd4b97 JB |
553 | If TARGET is non-null, add the sections of all new shared objects |
554 | to TARGET's section table. Note that this doesn't remove any | |
555 | sections for shared objects that have been unloaded, and it | |
556 | doesn't check to see if the new shared objects are already present in | |
557 | the section table. But we only use this for core files and | |
558 | processes we've just attached to, so that's okay. */ | |
c906108c | 559 | |
a78f21af | 560 | static void |
105b175f | 561 | update_solib_list (int from_tty, struct target_ops *target) |
07cd4b97 | 562 | { |
1cf3db46 | 563 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 564 | struct so_list *inferior = ops->current_sos(); |
07cd4b97 JB |
565 | struct so_list *gdb, **gdb_link; |
566 | ||
181e7f93 PA |
567 | /* We can reach here due to changing solib-search-path or the |
568 | sysroot, before having any inferior. */ | |
50c71eaf | 569 | if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid)) |
181e7f93 PA |
570 | { |
571 | struct inferior *inf = current_inferior (); | |
572 | ||
573 | /* If we are attaching to a running process for which we | |
574 | have not opened a symbol file, we may be able to get its | |
575 | symbols now! */ | |
576 | if (inf->attach_flag && symfile_objfile == NULL) | |
577 | catch_errors (ops->open_symbol_file_object, &from_tty, | |
578 | "Error reading attached process's symbol file.\n", | |
579 | RETURN_MASK_ALL); | |
580 | } | |
104c1213 | 581 | |
07cd4b97 JB |
582 | /* GDB and the inferior's dynamic linker each maintain their own |
583 | list of currently loaded shared objects; we want to bring the | |
584 | former in sync with the latter. Scan both lists, seeing which | |
585 | shared objects appear where. There are three cases: | |
586 | ||
587 | - A shared object appears on both lists. This means that GDB | |
105b175f JB |
588 | knows about it already, and it's still loaded in the inferior. |
589 | Nothing needs to happen. | |
07cd4b97 JB |
590 | |
591 | - A shared object appears only on GDB's list. This means that | |
105b175f JB |
592 | the inferior has unloaded it. We should remove the shared |
593 | object from GDB's tables. | |
07cd4b97 JB |
594 | |
595 | - A shared object appears only on the inferior's list. This | |
105b175f JB |
596 | means that it's just been loaded. We should add it to GDB's |
597 | tables. | |
07cd4b97 JB |
598 | |
599 | So we walk GDB's list, checking each entry to see if it appears | |
600 | in the inferior's list too. If it does, no action is needed, and | |
601 | we remove it from the inferior's list. If it doesn't, the | |
602 | inferior has unloaded it, and we remove it from GDB's list. By | |
603 | the time we're done walking GDB's list, the inferior's list | |
604 | contains only the new shared objects, which we then add. */ | |
605 | ||
606 | gdb = so_list_head; | |
607 | gdb_link = &so_list_head; | |
608 | while (gdb) | |
c906108c | 609 | { |
07cd4b97 JB |
610 | struct so_list *i = inferior; |
611 | struct so_list **i_link = &inferior; | |
612 | ||
613 | /* Check to see whether the shared object *gdb also appears in | |
614 | the inferior's current list. */ | |
615 | while (i) | |
c906108c | 616 | { |
a7c02bc8 VP |
617 | if (ops->same) |
618 | { | |
619 | if (ops->same (gdb, i)) | |
620 | break; | |
621 | } | |
622 | else | |
623 | { | |
624 | if (! strcmp (gdb->so_original_name, i->so_original_name)) | |
625 | break; | |
626 | } | |
07cd4b97 JB |
627 | |
628 | i_link = &i->next; | |
629 | i = *i_link; | |
c906108c | 630 | } |
c5aa993b | 631 | |
07cd4b97 JB |
632 | /* If the shared object appears on the inferior's list too, then |
633 | it's still loaded, so we don't need to do anything. Delete | |
634 | it from the inferior's list, and leave it on GDB's list. */ | |
635 | if (i) | |
c906108c | 636 | { |
07cd4b97 | 637 | *i_link = i->next; |
07cd4b97 JB |
638 | free_so (i); |
639 | gdb_link = &gdb->next; | |
640 | gdb = *gdb_link; | |
641 | } | |
642 | ||
643 | /* If it's not on the inferior's list, remove it from GDB's tables. */ | |
644 | else | |
645 | { | |
42a6e6a0 MK |
646 | /* Notify any observer that the shared object has been |
647 | unloaded before we remove it from GDB's tables. */ | |
84acb35a JJ |
648 | observer_notify_solib_unloaded (gdb); |
649 | ||
07cd4b97 | 650 | *gdb_link = gdb->next; |
07cd4b97 JB |
651 | |
652 | /* Unless the user loaded it explicitly, free SO's objfile. */ | |
e8930304 | 653 | if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
07cd4b97 JB |
654 | free_objfile (gdb->objfile); |
655 | ||
656 | /* Some targets' section tables might be referring to | |
657 | sections from so->abfd; remove them. */ | |
658 | remove_target_sections (gdb->abfd); | |
659 | ||
660 | free_so (gdb); | |
661 | gdb = *gdb_link; | |
c906108c SS |
662 | } |
663 | } | |
c5aa993b | 664 | |
07cd4b97 JB |
665 | /* Now the inferior's list contains only shared objects that don't |
666 | appear in GDB's list --- those that are newly loaded. Add them | |
e8930304 | 667 | to GDB's shared object list. */ |
07cd4b97 | 668 | if (inferior) |
c906108c | 669 | { |
07cd4b97 JB |
670 | struct so_list *i; |
671 | ||
672 | /* Add the new shared objects to GDB's list. */ | |
673 | *gdb_link = inferior; | |
674 | ||
e8930304 | 675 | /* Fill in the rest of each of the `struct so_list' nodes. */ |
07cd4b97 | 676 | for (i = inferior; i; i = i->next) |
c906108c | 677 | { |
07cd4b97 | 678 | i->from_tty = from_tty; |
6c95b8df | 679 | i->pspace = current_program_space; |
07cd4b97 JB |
680 | |
681 | /* Fill in the rest of the `struct so_list' node. */ | |
682 | catch_errors (solib_map_sections, i, | |
683 | "Error while mapping shared library sections:\n", | |
684 | RETURN_MASK_ALL); | |
07cd4b97 | 685 | |
07b82ea5 PA |
686 | /* Add the shared object's sections to the current set of |
687 | file section tables. Do this immediately after mapping | |
688 | the object so that later nodes in the list can query this | |
689 | object, as is needed in solib-osf.c. */ | |
690 | add_target_sections (i->sections, i->sections_end); | |
42a6e6a0 MK |
691 | |
692 | /* Notify any observer that the shared object has been | |
693 | loaded now that we've added it to GDB's tables. */ | |
694 | observer_notify_solib_loaded (i); | |
c906108c | 695 | } |
e8930304 | 696 | } |
105b175f JB |
697 | } |
698 | ||
17a37d48 PP |
699 | |
700 | /* Return non-zero if NAME is the libpthread shared library. | |
6612ad7f JB |
701 | |
702 | Uses a fairly simplistic heuristic approach where we check | |
703 | the file name against "/libpthread". This can lead to false | |
704 | positives, but this should be good enough in practice. */ | |
705 | ||
17a37d48 PP |
706 | int |
707 | libpthread_name_p (const char *name) | |
708 | { | |
709 | return (strstr (name, "/libpthread") != NULL); | |
710 | } | |
711 | ||
712 | /* Return non-zero if SO is the libpthread shared library. */ | |
713 | ||
6612ad7f JB |
714 | static int |
715 | libpthread_solib_p (struct so_list *so) | |
716 | { | |
17a37d48 | 717 | return libpthread_name_p (so->so_name); |
6612ad7f | 718 | } |
105b175f JB |
719 | |
720 | /* GLOBAL FUNCTION | |
721 | ||
722 | solib_add -- read in symbol info for newly added shared libraries | |
723 | ||
724 | SYNOPSIS | |
725 | ||
990f9fe3 FF |
726 | void solib_add (char *pattern, int from_tty, struct target_ops |
727 | *TARGET, int readsyms) | |
105b175f JB |
728 | |
729 | DESCRIPTION | |
730 | ||
731 | Read in symbolic information for any shared objects whose names | |
732 | match PATTERN. (If we've already read a shared object's symbol | |
733 | info, leave it alone.) If PATTERN is zero, read them all. | |
734 | ||
990f9fe3 FF |
735 | If READSYMS is 0, defer reading symbolic information until later |
736 | but still do any needed low level processing. | |
737 | ||
105b175f JB |
738 | FROM_TTY and TARGET are as described for update_solib_list, above. */ |
739 | ||
740 | void | |
990f9fe3 | 741 | solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms) |
105b175f JB |
742 | { |
743 | struct so_list *gdb; | |
744 | ||
745 | if (pattern) | |
746 | { | |
747 | char *re_err = re_comp (pattern); | |
748 | ||
749 | if (re_err) | |
8a3fe4f8 | 750 | error (_("Invalid regexp: %s"), re_err); |
105b175f JB |
751 | } |
752 | ||
753 | update_solib_list (from_tty, target); | |
c906108c | 754 | |
105b175f JB |
755 | /* Walk the list of currently loaded shared libraries, and read |
756 | symbols for any that match the pattern --- or any whose symbols | |
757 | aren't already loaded, if no pattern was given. */ | |
e8930304 JB |
758 | { |
759 | int any_matches = 0; | |
760 | int loaded_any_symbols = 0; | |
7eedccfa PP |
761 | const int flags = |
762 | SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0); | |
c906108c | 763 | |
e8930304 JB |
764 | for (gdb = so_list_head; gdb; gdb = gdb->next) |
765 | if (! pattern || re_exec (gdb->so_name)) | |
766 | { | |
6612ad7f JB |
767 | /* Normally, we would read the symbols from that library |
768 | only if READSYMS is set. However, we're making a small | |
769 | exception for the pthread library, because we sometimes | |
770 | need the library symbols to be loaded in order to provide | |
771 | thread support (x86-linux for instance). */ | |
772 | const int add_this_solib = | |
773 | (readsyms || libpthread_solib_p (gdb)); | |
774 | ||
e8930304 | 775 | any_matches = 1; |
7eedccfa | 776 | if (add_this_solib && solib_read_symbols (gdb, flags)) |
42a6e6a0 | 777 | loaded_any_symbols = 1; |
e8930304 JB |
778 | } |
779 | ||
7eedccfa PP |
780 | if (loaded_any_symbols) |
781 | breakpoint_re_set (); | |
782 | ||
e8930304 JB |
783 | if (from_tty && pattern && ! any_matches) |
784 | printf_unfiltered | |
785 | ("No loaded shared libraries match the pattern `%s'.\n", pattern); | |
786 | ||
787 | if (loaded_any_symbols) | |
788 | { | |
1cf3db46 | 789 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 790 | |
e8930304 JB |
791 | /* Getting new symbols may change our opinion about what is |
792 | frameless. */ | |
793 | reinit_frame_cache (); | |
794 | ||
66aba65d | 795 | ops->special_symbol_handling (); |
e8930304 JB |
796 | } |
797 | } | |
c906108c SS |
798 | } |
799 | ||
07cd4b97 | 800 | |
c906108c SS |
801 | /* |
802 | ||
c5aa993b | 803 | LOCAL FUNCTION |
c906108c | 804 | |
c5aa993b | 805 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 806 | |
c5aa993b | 807 | SYNOPSIS |
c906108c | 808 | |
c5aa993b | 809 | static void info_sharedlibrary_command () |
c906108c | 810 | |
c5aa993b | 811 | DESCRIPTION |
c906108c | 812 | |
c5aa993b | 813 | Walk through the shared library list and print information |
55333a84 DE |
814 | about each attached library matching PATTERN. If PATTERN is elided, |
815 | print them all. | |
c5aa993b | 816 | */ |
c906108c SS |
817 | |
818 | static void | |
55333a84 | 819 | info_sharedlibrary_command (char *pattern, int from_tty) |
c906108c | 820 | { |
52f0bd74 | 821 | struct so_list *so = NULL; /* link map state variable */ |
c906108c | 822 | int header_done = 0; |
55333a84 | 823 | int so_missing_debug_info = 0; |
c906108c | 824 | int addr_width; |
55333a84 DE |
825 | int nr_libs; |
826 | struct cleanup *table_cleanup; | |
827 | struct gdbarch *gdbarch = target_gdbarch; | |
828 | ||
829 | if (pattern) | |
830 | { | |
831 | char *re_err = re_comp (pattern); | |
832 | ||
833 | if (re_err) | |
834 | error (_("Invalid regexp: %s"), re_err); | |
835 | } | |
c906108c | 836 | |
84eb3c4f | 837 | /* "0x", a little whitespace, and two hex digits per byte of pointers. */ |
55333a84 | 838 | addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4); |
c906108c | 839 | |
105b175f | 840 | update_solib_list (from_tty, 0); |
07cd4b97 | 841 | |
55333a84 DE |
842 | /* make_cleanup_ui_out_table_begin_end needs to know the number of |
843 | rows, so we need to make two passes over the libs. */ | |
844 | ||
845 | for (nr_libs = 0, so = so_list_head; so; so = so->next) | |
c906108c | 846 | { |
c5aa993b | 847 | if (so->so_name[0]) |
c906108c | 848 | { |
55333a84 DE |
849 | if (pattern && ! re_exec (so->so_name)) |
850 | continue; | |
851 | ++nr_libs; | |
852 | } | |
853 | } | |
854 | ||
855 | table_cleanup = | |
856 | make_cleanup_ui_out_table_begin_end (uiout, 4, nr_libs, | |
857 | "SharedLibraryTable"); | |
858 | ||
859 | /* The "- 1" is because ui_out adds one space between columns. */ | |
860 | ui_out_table_header (uiout, addr_width - 1, ui_left, "from", "From"); | |
861 | ui_out_table_header (uiout, addr_width - 1, ui_left, "to", "To"); | |
862 | ui_out_table_header (uiout, 12 - 1, ui_left, "syms-read", "Syms Read"); | |
863 | ui_out_table_header (uiout, 0, ui_noalign, | |
864 | "name", "Shared Object Library"); | |
865 | ||
866 | ui_out_table_body (uiout); | |
867 | ||
868 | for (so = so_list_head; so; so = so->next) | |
869 | { | |
870 | struct cleanup *lib_cleanup; | |
c906108c | 871 | |
55333a84 DE |
872 | if (! so->so_name[0]) |
873 | continue; | |
874 | if (pattern && ! re_exec (so->so_name)) | |
875 | continue; | |
876 | ||
877 | lib_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "lib"); | |
878 | ||
879 | if (so->addr_high != 0) | |
880 | { | |
881 | ui_out_field_core_addr (uiout, "from", gdbarch, so->addr_low); | |
882 | ui_out_field_core_addr (uiout, "to", gdbarch, so->addr_high); | |
883 | } | |
884 | else | |
885 | { | |
886 | ui_out_field_skip (uiout, "from"); | |
887 | ui_out_field_skip (uiout, "to"); | |
c906108c | 888 | } |
55333a84 DE |
889 | |
890 | if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ())) | |
891 | && so->symbols_loaded | |
e0ae4240 | 892 | && !objfile_has_symbols (so->objfile)) |
55333a84 DE |
893 | { |
894 | so_missing_debug_info = 1; | |
895 | ui_out_field_string (uiout, "syms-read", "Yes (*)"); | |
896 | } | |
897 | else | |
898 | ui_out_field_string (uiout, "syms-read", | |
899 | so->symbols_loaded ? "Yes" : "No"); | |
900 | ||
901 | ui_out_field_string (uiout, "name", so->so_name); | |
902 | ||
903 | ui_out_text (uiout, "\n"); | |
904 | ||
905 | do_cleanups (lib_cleanup); | |
c906108c | 906 | } |
55333a84 DE |
907 | |
908 | do_cleanups (table_cleanup); | |
909 | ||
910 | if (nr_libs == 0) | |
911 | { | |
912 | if (pattern) | |
913 | ui_out_message (uiout, 0, | |
914 | _("No shared libraries matched.\n")); | |
915 | else | |
916 | ui_out_message (uiout, 0, | |
917 | _("No shared libraries loaded at this time.\n")); | |
918 | } | |
919 | else | |
c906108c | 920 | { |
55333a84 DE |
921 | if (so_missing_debug_info) |
922 | ui_out_message (uiout, 0, | |
923 | _("(*): Shared library is missing debugging information.\n")); | |
c906108c SS |
924 | } |
925 | } | |
926 | ||
5fd1a349 PP |
927 | /* Return 1 if ADDRESS lies within SOLIB. */ |
928 | ||
929 | int | |
930 | solib_contains_address_p (const struct so_list *const solib, | |
931 | CORE_ADDR address) | |
932 | { | |
0542c86d | 933 | struct target_section *p; |
5fd1a349 PP |
934 | |
935 | for (p = solib->sections; p < solib->sections_end; p++) | |
936 | if (p->addr <= address && address < p->endaddr) | |
937 | return 1; | |
938 | ||
939 | return 0; | |
940 | } | |
941 | ||
c906108c SS |
942 | /* |
943 | ||
c5aa993b | 944 | GLOBAL FUNCTION |
c906108c | 945 | |
f5c9a895 PP |
946 | solib_name_from_address -- if an address is in a shared lib, return |
947 | its name. | |
c906108c | 948 | |
c5aa993b | 949 | SYNOPSIS |
c906108c | 950 | |
f5c9a895 | 951 | char * solib_name_from_address (CORE_ADDR address) |
c906108c | 952 | |
c5aa993b | 953 | DESCRIPTION |
c906108c | 954 | |
c5aa993b JM |
955 | Provides a hook for other gdb routines to discover whether or |
956 | not a particular address is within the mapped address space of | |
749499cb | 957 | a shared library. |
c906108c | 958 | |
c5aa993b JM |
959 | For example, this routine is called at one point to disable |
960 | breakpoints which are in shared libraries that are not currently | |
961 | mapped in. | |
c906108c SS |
962 | */ |
963 | ||
964 | char * | |
6c95b8df | 965 | solib_name_from_address (struct program_space *pspace, CORE_ADDR address) |
c906108c | 966 | { |
6c95b8df | 967 | struct so_list *so = NULL; |
c5aa993b | 968 | |
6c95b8df | 969 | for (so = pspace->so_list; so; so = so->next) |
5fd1a349 PP |
970 | if (solib_contains_address_p (so, address)) |
971 | return (so->so_name); | |
07cd4b97 | 972 | |
c906108c SS |
973 | return (0); |
974 | } | |
975 | ||
de18c1d8 JM |
976 | /* Return whether the data starting at VADDR, size SIZE, must be kept |
977 | in a core file for shared libraries loaded before "gcore" is used | |
978 | to be handled correctly when the core file is loaded. This only | |
979 | applies when the section would otherwise not be kept in the core | |
980 | file (in particular, for readonly sections). */ | |
981 | ||
982 | int | |
983 | solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size) | |
984 | { | |
985 | struct target_so_ops *ops = solib_ops (target_gdbarch); | |
986 | ||
987 | if (ops->keep_data_in_core) | |
988 | return ops->keep_data_in_core (vaddr, size); | |
989 | else | |
990 | return 0; | |
991 | } | |
992 | ||
c906108c SS |
993 | /* Called by free_all_symtabs */ |
994 | ||
c5aa993b | 995 | void |
fba45db2 | 996 | clear_solib (void) |
c906108c | 997 | { |
1cf3db46 | 998 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 999 | |
085dd6e6 JM |
1000 | /* This function is expected to handle ELF shared libraries. It is |
1001 | also used on Solaris, which can run either ELF or a.out binaries | |
1002 | (for compatibility with SunOS 4), both of which can use shared | |
1003 | libraries. So we don't know whether we have an ELF executable or | |
1004 | an a.out executable until the user chooses an executable file. | |
1005 | ||
1006 | ELF shared libraries don't get mapped into the address space | |
1007 | until after the program starts, so we'd better not try to insert | |
1008 | breakpoints in them immediately. We have to wait until the | |
1009 | dynamic linker has loaded them; we'll hit a bp_shlib_event | |
1010 | breakpoint (look for calls to create_solib_event_breakpoint) when | |
1011 | it's ready. | |
1012 | ||
1013 | SunOS shared libraries seem to be different --- they're present | |
1014 | as soon as the process begins execution, so there's no need to | |
1015 | put off inserting breakpoints. There's also nowhere to put a | |
1016 | bp_shlib_event breakpoint, so if we put it off, we'll never get | |
1017 | around to it. | |
1018 | ||
1019 | So: disable breakpoints only if we're using ELF shared libs. */ | |
1020 | if (exec_bfd != NULL | |
1021 | && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) | |
cb851954 | 1022 | disable_breakpoints_in_shlibs (); |
085dd6e6 | 1023 | |
c906108c SS |
1024 | while (so_list_head) |
1025 | { | |
07cd4b97 JB |
1026 | struct so_list *so = so_list_head; |
1027 | so_list_head = so->next; | |
c86cf029 | 1028 | observer_notify_solib_unloaded (so); |
2069d78d KB |
1029 | if (so->abfd) |
1030 | remove_target_sections (so->abfd); | |
07cd4b97 | 1031 | free_so (so); |
c906108c | 1032 | } |
07cd4b97 | 1033 | |
66aba65d | 1034 | ops->clear_solib (); |
c906108c SS |
1035 | } |
1036 | ||
13437d4b | 1037 | /* GLOBAL FUNCTION |
c5aa993b JM |
1038 | |
1039 | solib_create_inferior_hook -- shared library startup support | |
1040 | ||
1041 | SYNOPSIS | |
1042 | ||
268a4a75 | 1043 | void solib_create_inferior_hook (int from_tty) |
c5aa993b JM |
1044 | |
1045 | DESCRIPTION | |
1046 | ||
1047 | When gdb starts up the inferior, it nurses it along (through the | |
1048 | shell) until it is ready to execute it's first instruction. At this | |
1049 | point, this function gets called via expansion of the macro | |
13437d4b | 1050 | SOLIB_CREATE_INFERIOR_HOOK. */ |
c5aa993b JM |
1051 | |
1052 | void | |
268a4a75 | 1053 | solib_create_inferior_hook (int from_tty) |
c906108c | 1054 | { |
1cf3db46 | 1055 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
268a4a75 | 1056 | ops->solib_create_inferior_hook (from_tty); |
c906108c SS |
1057 | } |
1058 | ||
d7fa2ae2 KB |
1059 | /* GLOBAL FUNCTION |
1060 | ||
1061 | in_solib_dynsym_resolve_code -- check to see if an address is in | |
1062 | dynamic loader's dynamic symbol | |
1063 | resolution code | |
1064 | ||
1065 | SYNOPSIS | |
1066 | ||
1067 | int in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
1068 | ||
1069 | DESCRIPTION | |
1070 | ||
1071 | Determine if PC is in the dynamic linker's symbol resolution | |
1072 | code. Return 1 if so, 0 otherwise. | |
1073 | */ | |
1074 | ||
1075 | int | |
1076 | in_solib_dynsym_resolve_code (CORE_ADDR pc) | |
1077 | { | |
1cf3db46 | 1078 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
66aba65d | 1079 | return ops->in_dynsym_resolve_code (pc); |
d7fa2ae2 | 1080 | } |
c906108c SS |
1081 | |
1082 | /* | |
1083 | ||
c5aa993b | 1084 | LOCAL FUNCTION |
c906108c | 1085 | |
c5aa993b | 1086 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 1087 | |
c5aa993b | 1088 | SYNOPSIS |
c906108c | 1089 | |
c5aa993b | 1090 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 1091 | |
c5aa993b | 1092 | DESCRIPTION |
c906108c | 1093 | |
c5aa993b | 1094 | */ |
c906108c SS |
1095 | |
1096 | static void | |
fba45db2 | 1097 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
1098 | { |
1099 | dont_repeat (); | |
990f9fe3 | 1100 | solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
1101 | } |
1102 | ||
cb0ba49e MS |
1103 | /* LOCAL FUNCTION |
1104 | ||
1105 | no_shared_libraries -- handle command to explicitly discard symbols | |
1106 | from shared libraries. | |
1107 | ||
1108 | DESCRIPTION | |
1109 | ||
1110 | Implements the command "nosharedlibrary", which discards symbols | |
1111 | that have been auto-loaded from shared libraries. Symbols from | |
1112 | shared libraries that were added by explicit request of the user | |
1113 | are not discarded. Also called from remote.c. */ | |
1114 | ||
c60a7562 MS |
1115 | void |
1116 | no_shared_libraries (char *ignored, int from_tty) | |
1117 | { | |
a3247a22 PP |
1118 | /* The order of the two routines below is important: clear_solib notifies |
1119 | the solib_unloaded observers, and some of these observers might need | |
1120 | access to their associated objfiles. Therefore, we can not purge the | |
1121 | solibs' objfiles before clear_solib has been called. */ | |
1122 | ||
615b9dba | 1123 | clear_solib (); |
a3247a22 | 1124 | objfile_purge_solibs (); |
c60a7562 | 1125 | } |
c906108c | 1126 | |
cf466558 | 1127 | static void |
f397e303 AC |
1128 | reload_shared_libraries (char *ignored, int from_tty, |
1129 | struct cmd_list_element *e) | |
cf466558 KB |
1130 | { |
1131 | no_shared_libraries (NULL, from_tty); | |
c8fa6cdd VP |
1132 | /* Creating inferior hooks here has two purposes. First, if we reload |
1133 | shared libraries then the address of solib breakpoint we've computed | |
1134 | previously might be no longer valid. For example, if we forgot to set | |
1135 | solib-absolute-prefix and are setting it right now, then the previous | |
1136 | breakpoint address is plain wrong. Second, installing solib hooks | |
1137 | also implicitly figures were ld.so is and loads symbols for it. | |
1138 | Absent this call, if we've just connected to a target and set | |
1139 | solib-absolute-prefix or solib-search-path, we'll lose all information | |
1140 | about ld.so. */ | |
1141 | if (target_has_execution) | |
1142 | { | |
1143 | #ifdef SOLIB_CREATE_INFERIOR_HOOK | |
1144 | SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid)); | |
1145 | #else | |
268a4a75 | 1146 | solib_create_inferior_hook (from_tty); |
c8fa6cdd VP |
1147 | #endif |
1148 | } | |
268a4a75 JK |
1149 | |
1150 | /* Sometimes the platform-specific hook loads initial shared | |
1151 | libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be | |
1152 | incorrectly 0 but such solib targets should be fixed anyway. If we | |
1153 | made all the inferior hook methods consistent, this call could be | |
1154 | removed. Call it only after the solib target has been initialized by | |
1155 | solib_create_inferior_hook. */ | |
1156 | ||
1157 | solib_add (NULL, 0, NULL, auto_solib_add); | |
1158 | ||
c8fa6cdd VP |
1159 | /* We have unloaded and then reloaded debug info for all shared libraries. |
1160 | However, frames may still reference them, for example a frame's | |
1161 | unwinder might still point of DWARF FDE structures that are now freed. | |
1162 | Reinit frame cache to avoid crashing. */ | |
1163 | reinit_frame_cache (); | |
cf466558 KB |
1164 | } |
1165 | ||
920d2a44 AC |
1166 | static void |
1167 | show_auto_solib_add (struct ui_file *file, int from_tty, | |
1168 | struct cmd_list_element *c, const char *value) | |
1169 | { | |
1170 | fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"), | |
1171 | value); | |
1172 | } | |
1173 | ||
1174 | ||
3a40aaa0 UW |
1175 | /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call |
1176 | the library-specific handler if it is installed for the current target. */ | |
1177 | ||
1178 | struct symbol * | |
1179 | solib_global_lookup (const struct objfile *objfile, | |
1180 | const char *name, | |
21b556f4 | 1181 | const domain_enum domain) |
3a40aaa0 | 1182 | { |
1cf3db46 | 1183 | struct target_so_ops *ops = solib_ops (target_gdbarch); |
3a40aaa0 | 1184 | |
e8a92f7b | 1185 | if (ops->lookup_lib_global_symbol != NULL) |
94af9270 | 1186 | return ops->lookup_lib_global_symbol (objfile, name, domain); |
3a40aaa0 UW |
1187 | return NULL; |
1188 | } | |
1189 | ||
1190 | ||
a78f21af AC |
1191 | extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */ |
1192 | ||
c906108c | 1193 | void |
fba45db2 | 1194 | _initialize_solib (void) |
c906108c | 1195 | { |
fa58ee11 EZ |
1196 | struct cmd_list_element *c; |
1197 | ||
66aba65d MK |
1198 | solib_data = gdbarch_data_register_pre_init (solib_init); |
1199 | ||
c906108c | 1200 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1bedd215 | 1201 | _("Load shared object library symbols for files matching REGEXP.")); |
c5aa993b | 1202 | add_info ("sharedlibrary", info_sharedlibrary_command, |
1bedd215 | 1203 | _("Status of loaded shared object libraries.")); |
c60a7562 | 1204 | add_com ("nosharedlibrary", class_files, no_shared_libraries, |
1bedd215 | 1205 | _("Unload all shared object library symbols.")); |
c906108c | 1206 | |
5bf193a2 AC |
1207 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1208 | &auto_solib_add, _("\ | |
1209 | Set autoloading of shared library symbols."), _("\ | |
1210 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1211 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1212 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1213 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
5bf193a2 AC |
1214 | inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."), |
1215 | NULL, | |
920d2a44 | 1216 | show_auto_solib_add, |
5bf193a2 | 1217 | &setlist, &showlist); |
c906108c | 1218 | |
f822c95b DJ |
1219 | add_setshow_filename_cmd ("sysroot", class_support, |
1220 | &gdb_sysroot, _("\ | |
1221 | Set an alternate system root."), _("\ | |
1222 | Show the current system root."), _("\ | |
1223 | The system root is used to load absolute shared library symbol files.\n\ | |
1224 | For other (relative) files, you can add directories using\n\ | |
1225 | `set solib-search-path'."), | |
f397e303 AC |
1226 | reload_shared_libraries, |
1227 | NULL, | |
1228 | &setlist, &showlist); | |
c906108c | 1229 | |
f822c95b DJ |
1230 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, |
1231 | &setlist); | |
1232 | add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0, | |
1233 | &showlist); | |
030292b7 | 1234 | |
525226b5 AC |
1235 | add_setshow_optional_filename_cmd ("solib-search-path", class_support, |
1236 | &solib_search_path, _("\ | |
1237 | Set the search path for loading non-absolute shared library symbol files."), _("\ | |
1238 | Show the search path for loading non-absolute shared library symbol files."), _("\ | |
1239 | This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."), | |
1240 | reload_shared_libraries, | |
920d2a44 | 1241 | show_solib_search_path, |
525226b5 | 1242 | &setlist, &showlist); |
c906108c | 1243 | } |