1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright (C) 1990-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
32 #include "gdb_regex.h"
37 #include "completer.h"
38 #include "filenames.h" /* for DOSish file names */
42 #include "readline/readline.h"
46 #include "filesystem.h"
48 #include "filestuff.h"
50 /* Architecture-specific operations. */
52 /* Per-architecture data key. */
53 static struct gdbarch_data *solib_data;
56 solib_init (struct obstack *obstack)
58 struct target_so_ops **ops;
60 ops = OBSTACK_ZALLOC (obstack, struct target_so_ops *);
61 *ops = current_target_so_ops;
65 static const struct target_so_ops *
66 solib_ops (struct gdbarch *gdbarch)
68 const struct target_so_ops **ops
69 = (const struct target_so_ops **) gdbarch_data (gdbarch, solib_data);
74 /* Set the solib operations for GDBARCH to NEW_OPS. */
77 set_solib_ops (struct gdbarch *gdbarch, const struct target_so_ops *new_ops)
79 const struct target_so_ops **ops
80 = (const struct target_so_ops **) gdbarch_data (gdbarch, solib_data);
86 /* external data declarations */
88 /* FIXME: gdbarch needs to control this variable, or else every
89 configuration needs to call set_solib_ops. */
90 struct target_so_ops *current_target_so_ops;
92 /* List of known shared objects */
93 #define so_list_head current_program_space->so_list
95 /* Local function prototypes */
97 /* If non-empty, this is a search path for loading non-absolute shared library
98 symbol files. This takes precedence over the environment variables PATH
99 and LD_LIBRARY_PATH. */
100 static char *solib_search_path = NULL;
102 show_solib_search_path (struct ui_file *file, int from_tty,
103 struct cmd_list_element *c, const char *value)
105 fprintf_filtered (file, _("The search path for loading non-absolute "
106 "shared library symbol files is %s.\n"),
110 /* Same as HAVE_DOS_BASED_FILE_SYSTEM, but useable as an rvalue. */
111 #if (HAVE_DOS_BASED_FILE_SYSTEM)
112 # define DOS_BASED_FILE_SYSTEM 1
114 # define DOS_BASED_FILE_SYSTEM 0
117 /* Return the full pathname of a binary file (the main executable
118 or a shared library file), or NULL if not found. The returned
119 pathname is malloc'ed and must be freed by the caller. If FD
120 is non-NULL, *FD is set to either -1 or an open file handle for
123 Global variable GDB_SYSROOT is used as a prefix directory
124 to search for binary files if they have an absolute path.
125 If GDB_SYSROOT starts with "target:" and target filesystem
126 is the local filesystem then the "target:" prefix will be
127 stripped before the search starts. This ensures that the
128 same search algorithm is used for local files regardless of
129 whether a "target:" prefix was used.
131 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
132 (or set of directories, as in LD_LIBRARY_PATH) to search for all
133 shared libraries if not found in either the sysroot (if set) or
134 the local filesystem. SOLIB_SEARCH_PATH is not used when searching
135 for the main executable.
138 * If a sysroot is set and path is absolute:
139 * Search for sysroot/path.
141 * Look for it literally (unmodified).
142 * If IS_SOLIB is non-zero:
143 * Look in SOLIB_SEARCH_PATH.
144 * If available, use target defined search function.
145 * If NO sysroot is set, perform the following two searches:
146 * Look in inferior's $PATH.
147 * If IS_SOLIB is non-zero:
148 * Look in inferior's $LD_LIBRARY_PATH.
150 * The last check avoids doing this search when targetting remote
151 * machines since a sysroot will almost always be set.
155 solib_find_1 (char *in_pathname, int *fd, int is_solib)
157 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
159 char *temp_pathname = NULL;
160 const char *fskind = effective_target_file_system_kind ();
161 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
162 char *sysroot = gdb_sysroot;
163 int prefix_len, orig_prefix_len;
165 /* If the absolute prefix starts with "target:" but the filesystem
166 accessed by the target_fileio_* methods is the local filesystem
167 then we strip the "target:" prefix now and work with the local
168 filesystem. This ensures that the same search algorithm is used
169 for all local files regardless of whether a "target:" prefix was
171 if (is_target_filename (sysroot) && target_filesystem_is_local ())
172 sysroot += strlen (TARGET_SYSROOT_PREFIX);
174 /* Strip any trailing slashes from the absolute prefix. */
175 prefix_len = orig_prefix_len = strlen (sysroot);
177 while (prefix_len > 0 && IS_DIR_SEPARATOR (sysroot[prefix_len - 1]))
182 else if (prefix_len != orig_prefix_len)
184 sysroot = savestring (sysroot, prefix_len);
185 make_cleanup (xfree, sysroot);
188 /* If we're on a non-DOS-based system, backslashes won't be
189 understood as directory separator, so, convert them to forward
190 slashes, iff we're supposed to handle DOS-based file system
191 semantics for target paths. */
192 if (!DOS_BASED_FILE_SYSTEM && fskind == file_system_kind_dos_based)
196 /* Avoid clobbering our input. */
197 p = (char *) alloca (strlen (in_pathname) + 1);
198 strcpy (p, in_pathname);
208 /* Note, we're interested in IS_TARGET_ABSOLUTE_PATH, not
209 IS_ABSOLUTE_PATH. The latter is for host paths only, while
210 IN_PATHNAME is a target path. For example, if we're supposed to
211 be handling DOS-like semantics we want to consider a
212 'c:/foo/bar.dll' path as an absolute path, even on a Unix box.
213 With such a path, before giving up on the sysroot, we'll try:
215 1st attempt, c:/foo/bar.dll ==> /sysroot/c:/foo/bar.dll
216 2nd attempt, c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll
217 3rd attempt, c:/foo/bar.dll ==> /sysroot/foo/bar.dll
220 if (!IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname) || sysroot == NULL)
221 temp_pathname = xstrdup (in_pathname);
224 int need_dir_separator;
226 /* Concatenate the sysroot and the target reported filename. We
227 may need to glue them with a directory separator. Cases to
230 | sysroot | separator | in_pathname |
231 |-----------------+-----------+----------------|
232 | /some/dir | / | c:/foo/bar.dll |
233 | /some/dir | | /foo/bar.dll |
234 | target: | | c:/foo/bar.dll |
235 | target: | | /foo/bar.dll |
236 | target:some/dir | / | c:/foo/bar.dll |
237 | target:some/dir | | /foo/bar.dll |
239 IOW, we don't need to add a separator if IN_PATHNAME already
240 has one, or when the the sysroot is exactly "target:".
241 There's no need to check for drive spec explicitly, as we only
242 get here if IN_PATHNAME is considered an absolute path. */
243 need_dir_separator = !(IS_DIR_SEPARATOR (in_pathname[0])
244 || strcmp (TARGET_SYSROOT_PREFIX, sysroot) == 0);
246 /* Cat the prefixed pathname together. */
247 temp_pathname = concat (sysroot,
248 need_dir_separator ? SLASH_STRING : "",
249 in_pathname, (char *) NULL);
252 /* Handle files to be accessed via the target. */
253 if (is_target_filename (temp_pathname))
257 do_cleanups (old_chain);
258 return temp_pathname;
261 /* Now see if we can open it. */
262 found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0);
264 xfree (temp_pathname);
266 /* If the search in gdb_sysroot failed, and the path name has a
267 drive spec (e.g, c:/foo), try stripping ':' from the drive spec,
268 and retrying in the sysroot:
269 c:/foo/bar.dll ==> /sysroot/c/foo/bar.dll. */
273 && HAS_TARGET_DRIVE_SPEC (fskind, in_pathname))
275 int need_dir_separator = !IS_DIR_SEPARATOR (in_pathname[2]);
276 char *drive = savestring (in_pathname, 1);
278 temp_pathname = concat (sysroot,
281 need_dir_separator ? SLASH_STRING : "",
282 in_pathname + 2, (char *) NULL);
285 found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0);
288 xfree (temp_pathname);
290 /* If the search in gdb_sysroot still failed, try fully
291 stripping the drive spec, and trying once more in the
292 sysroot before giving up.
294 c:/foo/bar.dll ==> /sysroot/foo/bar.dll. */
296 temp_pathname = concat (sysroot,
297 need_dir_separator ? SLASH_STRING : "",
298 in_pathname + 2, (char *) NULL);
300 found_file = gdb_open_cloexec (temp_pathname, O_RDONLY | O_BINARY, 0);
302 xfree (temp_pathname);
306 do_cleanups (old_chain);
308 /* We try to find the library in various ways. After each attempt,
309 either found_file >= 0 and temp_pathname is a malloc'd string, or
310 found_file < 0 and temp_pathname does not point to storage that
311 needs to be freed. */
314 temp_pathname = NULL;
316 /* If the search in gdb_sysroot failed, and the path name is
317 absolute at this point, make it relative. (openp will try and open the
318 file according to its absolute path otherwise, which is not what we want.)
319 Affects subsequent searches for this solib. */
320 if (found_file < 0 && IS_TARGET_ABSOLUTE_PATH (fskind, in_pathname))
322 /* First, get rid of any drive letters etc. */
323 while (!IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname))
326 /* Next, get rid of all leading dir separators. */
327 while (IS_TARGET_DIR_SEPARATOR (fskind, *in_pathname))
331 /* If not found, and we're looking for a solib, search the
332 solib_search_path (if any). */
333 if (is_solib && found_file < 0 && solib_search_path != NULL)
334 found_file = openp (solib_search_path,
335 OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH,
336 in_pathname, O_RDONLY | O_BINARY, &temp_pathname);
338 /* If not found, and we're looking for a solib, next search the
339 solib_search_path (if any) for the basename only (ignoring the
340 path). This is to allow reading solibs from a path that differs
341 from the opened path. */
342 if (is_solib && found_file < 0 && solib_search_path != NULL)
343 found_file = openp (solib_search_path,
344 OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH,
345 target_lbasename (fskind, in_pathname),
346 O_RDONLY | O_BINARY, &temp_pathname);
348 /* If not found, and we're looking for a solib, try to use target
349 supplied solib search method. */
350 if (is_solib && found_file < 0 && ops->find_and_open_solib)
351 found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY,
354 /* If not found, next search the inferior's $PATH environment variable. */
355 if (found_file < 0 && sysroot == NULL)
356 found_file = openp (get_in_environ (current_inferior ()->environment,
358 OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname,
359 O_RDONLY | O_BINARY, &temp_pathname);
361 /* If not found, and we're looking for a solib, next search the
362 inferior's $LD_LIBRARY_PATH environment variable. */
363 if (is_solib && found_file < 0 && sysroot == NULL)
364 found_file = openp (get_in_environ (current_inferior ()->environment,
366 OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, in_pathname,
367 O_RDONLY | O_BINARY, &temp_pathname);
377 return temp_pathname;
380 /* Return the full pathname of the main executable, or NULL if not
381 found. The returned pathname is malloc'ed and must be freed by
382 the caller. If FD is non-NULL, *FD is set to either -1 or an open
383 file handle for the main executable.
385 The search algorithm used is described in solib_find_1's comment
389 exec_file_find (char *in_pathname, int *fd)
391 char *result = solib_find_1 (in_pathname, fd, 0);
395 const char *fskind = effective_target_file_system_kind ();
397 if (fskind == file_system_kind_dos_based)
401 new_pathname = (char *) alloca (strlen (in_pathname) + 5);
402 strcpy (new_pathname, in_pathname);
403 strcat (new_pathname, ".exe");
405 result = solib_find_1 (new_pathname, fd, 0);
412 /* Return the full pathname of a shared library file, or NULL if not
413 found. The returned pathname is malloc'ed and must be freed by
414 the caller. If FD is non-NULL, *FD is set to either -1 or an open
415 file handle for the shared library.
417 The search algorithm used is described in solib_find_1's comment
421 solib_find (char *in_pathname, int *fd)
423 const char *solib_symbols_extension
424 = gdbarch_solib_symbols_extension (target_gdbarch ());
426 /* If solib_symbols_extension is set, replace the file's
428 if (solib_symbols_extension != NULL)
430 char *p = in_pathname + strlen (in_pathname);
432 while (p > in_pathname && *p != '.')
440 = (char *) alloca (p - in_pathname + 1
441 + strlen (solib_symbols_extension) + 1);
442 memcpy (new_pathname, in_pathname, p - in_pathname + 1);
443 strcpy (new_pathname + (p - in_pathname) + 1,
444 solib_symbols_extension);
446 in_pathname = new_pathname;
450 return solib_find_1 (in_pathname, fd, 1);
453 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
454 it is used as file handle to open the file. Throws an error if the file
455 could not be opened. Handles both local and remote file access.
457 PATHNAME must be malloc'ed by the caller. It will be freed by this
458 function. If unsuccessful, the FD will be closed (unless FD was
462 solib_bfd_fopen (char *pathname, int fd)
464 bfd *abfd = gdb_bfd_open (pathname, gnutarget, fd);
466 if (abfd != NULL && !gdb_bfd_has_target_filename (abfd))
467 bfd_set_cacheable (abfd, 1);
471 make_cleanup (xfree, pathname);
472 error (_("Could not open `%s' as an executable file: %s"),
473 pathname, bfd_errmsg (bfd_get_error ()));
481 /* Find shared library PATHNAME and open a BFD for it. */
484 solib_bfd_open (char *pathname)
486 char *found_pathname;
489 const struct bfd_arch_info *b;
491 /* Search for shared library file. */
492 found_pathname = solib_find (pathname, &found_file);
493 if (found_pathname == NULL)
495 /* Return failure if the file could not be found, so that we can
496 accumulate messages about missing libraries. */
500 perror_with_name (pathname);
503 /* Open bfd for shared library. */
504 abfd = solib_bfd_fopen (found_pathname, found_file);
506 /* Check bfd format. */
507 if (!bfd_check_format (abfd, bfd_object))
509 make_cleanup_bfd_unref (abfd);
510 error (_("`%s': not in executable format: %s"),
511 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
514 /* Check bfd arch. */
515 b = gdbarch_bfd_arch_info (target_gdbarch ());
516 if (!b->compatible (b, bfd_get_arch_info (abfd)))
517 warning (_("`%s': Shared library architecture %s is not compatible "
518 "with target architecture %s."), bfd_get_filename (abfd),
519 bfd_get_arch_info (abfd)->printable_name, b->printable_name);
524 /* Given a pointer to one of the shared objects in our list of mapped
525 objects, use the recorded name to open a bfd descriptor for the
526 object, build a section table, relocate all the section addresses
527 by the base address at which the shared object was mapped, and then
528 add the sections to the target's section table.
530 FIXME: In most (all?) cases the shared object file name recorded in
531 the dynamic linkage tables will be a fully qualified pathname. For
532 cases where it isn't, do we really mimic the systems search
533 mechanism correctly in the below code (particularly the tilde
534 expansion stuff?). */
537 solib_map_sections (struct so_list *so)
539 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
541 struct target_section *p;
542 struct cleanup *old_chain;
545 filename = tilde_expand (so->so_name);
546 old_chain = make_cleanup (xfree, filename);
547 abfd = ops->bfd_open (filename);
548 do_cleanups (old_chain);
553 /* Leave bfd open, core_xfer_memory and "info files" need it. */
556 /* Copy the full path name into so_name, allowing symbol_file_add
557 to find it later. This also affects the =library-loaded GDB/MI
558 event, and in particular the part of that notification providing
559 the library's host-side path. If we let the target dictate
560 that objfile's path, and the target is different from the host,
561 GDB/MI will not provide the correct host-side path. */
562 if (strlen (bfd_get_filename (abfd)) >= SO_NAME_MAX_PATH_SIZE)
563 error (_("Shared library file name is too long."));
564 strcpy (so->so_name, bfd_get_filename (abfd));
566 if (build_section_table (abfd, &so->sections, &so->sections_end))
568 error (_("Can't find the file sections in `%s': %s"),
569 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
572 for (p = so->sections; p < so->sections_end; p++)
574 /* Relocate the section binding addresses as recorded in the shared
575 object's file by the base address to which the object was actually
577 ops->relocate_section_addresses (so, p);
579 /* If the target didn't provide information about the address
580 range of the shared object, assume we want the location of
581 the .text section. */
582 if (so->addr_low == 0 && so->addr_high == 0
583 && strcmp (p->the_bfd_section->name, ".text") == 0)
585 so->addr_low = p->addr;
586 so->addr_high = p->endaddr;
590 /* Add the shared object's sections to the current set of file
591 section tables. Do this immediately after mapping the object so
592 that later nodes in the list can query this object, as is needed
594 add_target_sections (so, so->sections, so->sections_end);
599 /* Free symbol-file related contents of SO and reset for possible reloading
600 of SO. If we have opened a BFD for SO, close it. If we have placed SO's
601 sections in some target's section table, the caller is responsible for
604 This function doesn't mess with objfiles at all. If there is an
605 objfile associated with SO that needs to be removed, the caller is
606 responsible for taking care of that. */
609 clear_so (struct so_list *so)
611 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
615 xfree (so->sections);
616 so->sections = so->sections_end = NULL;
619 gdb_bfd_unref (so->abfd);
622 /* Our caller closed the objfile, possibly via objfile_purge_solibs. */
623 so->symbols_loaded = 0;
626 so->addr_low = so->addr_high = 0;
628 /* Restore the target-supplied file name. SO_NAME may be the path
629 of the symbol file. */
630 strcpy (so->so_name, so->so_original_name);
632 /* Do the same for target-specific data. */
633 if (ops->clear_so != NULL)
637 /* Free the storage associated with the `struct so_list' object SO.
638 If we have opened a BFD for SO, close it.
640 The caller is responsible for removing SO from whatever list it is
641 a member of. If we have placed SO's sections in some target's
642 section table, the caller is responsible for removing them.
644 This function doesn't mess with objfiles at all. If there is an
645 objfile associated with SO that needs to be removed, the caller is
646 responsible for taking care of that. */
649 free_so (struct so_list *so)
651 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
660 /* Return address of first so_list entry in master shared object list. */
662 master_so_list (void)
667 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
668 be chatty about it. Return non-zero if any symbols were actually
672 solib_read_symbols (struct so_list *so, int flags)
674 if (so->symbols_loaded)
676 /* If needed, we've already warned in our caller. */
678 else if (so->abfd == NULL)
680 /* We've already warned about this library, when trying to open
686 flags |= current_inferior ()->symfile_flags;
690 struct section_addr_info *sap;
692 /* Have we already loaded this shared object? */
693 ALL_OBJFILES (so->objfile)
695 if (filename_cmp (objfile_name (so->objfile), so->so_name) == 0
696 && so->objfile->addr_low == so->addr_low)
699 if (so->objfile == NULL)
701 sap = build_section_addr_info_from_section_table (so->sections,
703 so->objfile = symbol_file_add_from_bfd (so->abfd, so->so_name,
704 flags, sap, OBJF_SHARED,
706 so->objfile->addr_low = so->addr_low;
707 free_section_addr_info (sap);
710 so->symbols_loaded = 1;
712 CATCH (e, RETURN_MASK_ERROR)
714 exception_fprintf (gdb_stderr, e, _("Error while reading shared"
715 " library symbols for %s:\n"),
726 /* Return 1 if KNOWN->objfile is used by any other so_list object in the
727 SO_LIST_HEAD list. Return 0 otherwise. */
730 solib_used (const struct so_list *const known)
732 const struct so_list *pivot;
734 for (pivot = so_list_head; pivot != NULL; pivot = pivot->next)
735 if (pivot != known && pivot->objfile == known->objfile)
740 /* Synchronize GDB's shared object list with inferior's.
742 Extract the list of currently loaded shared objects from the
743 inferior, and compare it with the list of shared objects currently
744 in GDB's so_list_head list. Edit so_list_head to bring it in sync
745 with the inferior's new list.
747 If we notice that the inferior has unloaded some shared objects,
748 free any symbolic info GDB had read about those shared objects.
750 Don't load symbolic info for any new shared objects; just add them
751 to the list, and leave their symbols_loaded flag clear.
753 If FROM_TTY is non-null, feel free to print messages about what
756 If TARGET is non-null, add the sections of all new shared objects
757 to TARGET's section table. Note that this doesn't remove any
758 sections for shared objects that have been unloaded, and it
759 doesn't check to see if the new shared objects are already present in
760 the section table. But we only use this for core files and
761 processes we've just attached to, so that's okay. */
764 update_solib_list (int from_tty, struct target_ops *target)
766 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
767 struct so_list *inferior = ops->current_sos();
768 struct so_list *gdb, **gdb_link;
770 /* We can reach here due to changing solib-search-path or the
771 sysroot, before having any inferior. */
772 if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid))
774 struct inferior *inf = current_inferior ();
776 /* If we are attaching to a running process for which we
777 have not opened a symbol file, we may be able to get its
779 if (inf->attach_flag && symfile_objfile == NULL)
780 catch_errors (ops->open_symbol_file_object, &from_tty,
781 "Error reading attached process's symbol file.\n",
785 /* GDB and the inferior's dynamic linker each maintain their own
786 list of currently loaded shared objects; we want to bring the
787 former in sync with the latter. Scan both lists, seeing which
788 shared objects appear where. There are three cases:
790 - A shared object appears on both lists. This means that GDB
791 knows about it already, and it's still loaded in the inferior.
792 Nothing needs to happen.
794 - A shared object appears only on GDB's list. This means that
795 the inferior has unloaded it. We should remove the shared
796 object from GDB's tables.
798 - A shared object appears only on the inferior's list. This
799 means that it's just been loaded. We should add it to GDB's
802 So we walk GDB's list, checking each entry to see if it appears
803 in the inferior's list too. If it does, no action is needed, and
804 we remove it from the inferior's list. If it doesn't, the
805 inferior has unloaded it, and we remove it from GDB's list. By
806 the time we're done walking GDB's list, the inferior's list
807 contains only the new shared objects, which we then add. */
810 gdb_link = &so_list_head;
813 struct so_list *i = inferior;
814 struct so_list **i_link = &inferior;
816 /* Check to see whether the shared object *gdb also appears in
817 the inferior's current list. */
822 if (ops->same (gdb, i))
827 if (! filename_cmp (gdb->so_original_name, i->so_original_name))
835 /* If the shared object appears on the inferior's list too, then
836 it's still loaded, so we don't need to do anything. Delete
837 it from the inferior's list, and leave it on GDB's list. */
842 gdb_link = &gdb->next;
846 /* If it's not on the inferior's list, remove it from GDB's tables. */
849 /* Notify any observer that the shared object has been
850 unloaded before we remove it from GDB's tables. */
851 observer_notify_solib_unloaded (gdb);
853 VEC_safe_push (char_ptr, current_program_space->deleted_solibs,
854 xstrdup (gdb->so_name));
856 *gdb_link = gdb->next;
858 /* Unless the user loaded it explicitly, free SO's objfile. */
859 if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)
860 && !solib_used (gdb))
861 free_objfile (gdb->objfile);
863 /* Some targets' section tables might be referring to
864 sections from so->abfd; remove them. */
865 remove_target_sections (gdb);
872 /* Now the inferior's list contains only shared objects that don't
873 appear in GDB's list --- those that are newly loaded. Add them
874 to GDB's shared object list. */
878 const char *not_found_filename = NULL;
882 /* Add the new shared objects to GDB's list. */
883 *gdb_link = inferior;
885 /* Fill in the rest of each of the `struct so_list' nodes. */
886 for (i = inferior; i; i = i->next)
889 i->pspace = current_program_space;
890 VEC_safe_push (so_list_ptr, current_program_space->added_solibs, i);
894 /* Fill in the rest of the `struct so_list' node. */
895 if (!solib_map_sections (i))
898 if (not_found_filename == NULL)
899 not_found_filename = i->so_original_name;
903 CATCH (e, RETURN_MASK_ERROR)
905 exception_fprintf (gdb_stderr, e,
906 _("Error while mapping shared "
907 "library sections:\n"));
911 /* Notify any observer that the shared object has been
912 loaded now that we've added it to GDB's tables. */
913 observer_notify_solib_loaded (i);
916 /* If a library was not found, issue an appropriate warning
917 message. We have to use a single call to warning in case the
918 front end does something special with warnings, e.g., pop up
919 a dialog box. It Would Be Nice if we could get a "warning: "
920 prefix on each line in the CLI front end, though - it doesn't
924 warning (_("Could not load shared library symbols for %s.\n"
925 "Do you need \"set solib-search-path\" "
926 "or \"set sysroot\"?"),
928 else if (not_found > 1)
930 Could not load shared library symbols for %d libraries, e.g. %s.\n\
931 Use the \"info sharedlibrary\" command to see the complete listing.\n\
932 Do you need \"set solib-search-path\" or \"set sysroot\"?"),
933 not_found, not_found_filename);
938 /* Return non-zero if NAME is the libpthread shared library.
940 Uses a fairly simplistic heuristic approach where we check
941 the file name against "/libpthread". This can lead to false
942 positives, but this should be good enough in practice. */
945 libpthread_name_p (const char *name)
947 return (strstr (name, "/libpthread") != NULL);
950 /* Return non-zero if SO is the libpthread shared library. */
953 libpthread_solib_p (struct so_list *so)
955 return libpthread_name_p (so->so_name);
958 /* Read in symbolic information for any shared objects whose names
959 match PATTERN. (If we've already read a shared object's symbol
960 info, leave it alone.) If PATTERN is zero, read them all.
962 If READSYMS is 0, defer reading symbolic information until later
963 but still do any needed low level processing.
965 FROM_TTY and TARGET are as described for update_solib_list, above. */
968 solib_add (const char *pattern, int from_tty,
969 struct target_ops *target, int readsyms)
973 if (print_symbol_loading_p (from_tty, 0, 0))
977 printf_unfiltered (_("Loading symbols for shared libraries: %s\n"),
981 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
984 current_program_space->solib_add_generation++;
988 char *re_err = re_comp (pattern);
991 error (_("Invalid regexp: %s"), re_err);
994 update_solib_list (from_tty, target);
996 /* Walk the list of currently loaded shared libraries, and read
997 symbols for any that match the pattern --- or any whose symbols
998 aren't already loaded, if no pattern was given. */
1000 int any_matches = 0;
1001 int loaded_any_symbols = 0;
1003 SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0);
1005 for (gdb = so_list_head; gdb; gdb = gdb->next)
1006 if (! pattern || re_exec (gdb->so_name))
1008 /* Normally, we would read the symbols from that library
1009 only if READSYMS is set. However, we're making a small
1010 exception for the pthread library, because we sometimes
1011 need the library symbols to be loaded in order to provide
1012 thread support (x86-linux for instance). */
1013 const int add_this_solib =
1014 (readsyms || libpthread_solib_p (gdb));
1019 if (gdb->symbols_loaded)
1021 /* If no pattern was given, be quiet for shared
1022 libraries we have already loaded. */
1023 if (pattern && (from_tty || info_verbose))
1024 printf_unfiltered (_("Symbols already loaded for %s\n"),
1027 else if (solib_read_symbols (gdb, flags))
1028 loaded_any_symbols = 1;
1032 if (loaded_any_symbols)
1033 breakpoint_re_set ();
1035 if (from_tty && pattern && ! any_matches)
1037 ("No loaded shared libraries match the pattern `%s'.\n", pattern);
1039 if (loaded_any_symbols)
1041 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
1043 /* Getting new symbols may change our opinion about what is
1045 reinit_frame_cache ();
1047 ops->special_symbol_handling ();
1052 /* Implement the "info sharedlibrary" command. Walk through the
1053 shared library list and print information about each attached
1054 library matching PATTERN. If PATTERN is elided, print them
1058 info_sharedlibrary_command (char *pattern, int from_tty)
1060 struct so_list *so = NULL; /* link map state variable */
1061 int so_missing_debug_info = 0;
1064 struct cleanup *table_cleanup;
1065 struct gdbarch *gdbarch = target_gdbarch ();
1066 struct ui_out *uiout = current_uiout;
1070 char *re_err = re_comp (pattern);
1073 error (_("Invalid regexp: %s"), re_err);
1076 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
1077 addr_width = 4 + (gdbarch_ptr_bit (gdbarch) / 4);
1079 update_solib_list (from_tty, 0);
1081 /* make_cleanup_ui_out_table_begin_end needs to know the number of
1082 rows, so we need to make two passes over the libs. */
1084 for (nr_libs = 0, so = so_list_head; so; so = so->next)
1088 if (pattern && ! re_exec (so->so_name))
1095 make_cleanup_ui_out_table_begin_end (uiout, 4, nr_libs,
1096 "SharedLibraryTable");
1098 /* The "- 1" is because ui_out adds one space between columns. */
1099 ui_out_table_header (uiout, addr_width - 1, ui_left, "from", "From");
1100 ui_out_table_header (uiout, addr_width - 1, ui_left, "to", "To");
1101 ui_out_table_header (uiout, 12 - 1, ui_left, "syms-read", "Syms Read");
1102 ui_out_table_header (uiout, 0, ui_noalign,
1103 "name", "Shared Object Library");
1105 ui_out_table_body (uiout);
1107 for (so = so_list_head; so; so = so->next)
1109 struct cleanup *lib_cleanup;
1111 if (! so->so_name[0])
1113 if (pattern && ! re_exec (so->so_name))
1116 lib_cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "lib");
1118 if (so->addr_high != 0)
1120 ui_out_field_core_addr (uiout, "from", gdbarch, so->addr_low);
1121 ui_out_field_core_addr (uiout, "to", gdbarch, so->addr_high);
1125 ui_out_field_skip (uiout, "from");
1126 ui_out_field_skip (uiout, "to");
1129 if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))
1130 && so->symbols_loaded
1131 && !objfile_has_symbols (so->objfile))
1133 so_missing_debug_info = 1;
1134 ui_out_field_string (uiout, "syms-read", "Yes (*)");
1137 ui_out_field_string (uiout, "syms-read",
1138 so->symbols_loaded ? "Yes" : "No");
1140 ui_out_field_string (uiout, "name", so->so_name);
1142 ui_out_text (uiout, "\n");
1144 do_cleanups (lib_cleanup);
1147 do_cleanups (table_cleanup);
1152 ui_out_message (uiout, 0,
1153 _("No shared libraries matched.\n"));
1155 ui_out_message (uiout, 0,
1156 _("No shared libraries loaded at this time.\n"));
1160 if (so_missing_debug_info)
1161 ui_out_message (uiout, 0,
1162 _("(*): Shared library is missing "
1163 "debugging information.\n"));
1167 /* Return 1 if ADDRESS lies within SOLIB. */
1170 solib_contains_address_p (const struct so_list *const solib,
1173 struct target_section *p;
1175 for (p = solib->sections; p < solib->sections_end; p++)
1176 if (p->addr <= address && address < p->endaddr)
1182 /* If ADDRESS is in a shared lib in program space PSPACE, return its
1185 Provides a hook for other gdb routines to discover whether or not a
1186 particular address is within the mapped address space of a shared
1189 For example, this routine is called at one point to disable
1190 breakpoints which are in shared libraries that are not currently
1194 solib_name_from_address (struct program_space *pspace, CORE_ADDR address)
1196 struct so_list *so = NULL;
1198 for (so = pspace->so_list; so; so = so->next)
1199 if (solib_contains_address_p (so, address))
1200 return (so->so_name);
1205 /* Return whether the data starting at VADDR, size SIZE, must be kept
1206 in a core file for shared libraries loaded before "gcore" is used
1207 to be handled correctly when the core file is loaded. This only
1208 applies when the section would otherwise not be kept in the core
1209 file (in particular, for readonly sections). */
1212 solib_keep_data_in_core (CORE_ADDR vaddr, unsigned long size)
1214 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
1216 if (ops->keep_data_in_core)
1217 return ops->keep_data_in_core (vaddr, size);
1222 /* Called by free_all_symtabs */
1227 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
1229 /* This function is expected to handle ELF shared libraries. It is
1230 also used on Solaris, which can run either ELF or a.out binaries
1231 (for compatibility with SunOS 4), both of which can use shared
1232 libraries. So we don't know whether we have an ELF executable or
1233 an a.out executable until the user chooses an executable file.
1235 ELF shared libraries don't get mapped into the address space
1236 until after the program starts, so we'd better not try to insert
1237 breakpoints in them immediately. We have to wait until the
1238 dynamic linker has loaded them; we'll hit a bp_shlib_event
1239 breakpoint (look for calls to create_solib_event_breakpoint) when
1242 SunOS shared libraries seem to be different --- they're present
1243 as soon as the process begins execution, so there's no need to
1244 put off inserting breakpoints. There's also nowhere to put a
1245 bp_shlib_event breakpoint, so if we put it off, we'll never get
1248 So: disable breakpoints only if we're using ELF shared libs. */
1249 if (exec_bfd != NULL
1250 && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour)
1251 disable_breakpoints_in_shlibs ();
1253 while (so_list_head)
1255 struct so_list *so = so_list_head;
1257 so_list_head = so->next;
1258 observer_notify_solib_unloaded (so);
1259 remove_target_sections (so);
1263 ops->clear_solib ();
1266 /* Shared library startup support. When GDB starts up the inferior,
1267 it nurses it along (through the shell) until it is ready to execute
1268 its first instruction. At this point, this function gets
1272 solib_create_inferior_hook (int from_tty)
1274 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
1276 ops->solib_create_inferior_hook (from_tty);
1279 /* Check to see if an address is in the dynamic loader's dynamic
1280 symbol resolution code. Return 1 if so, 0 otherwise. */
1283 in_solib_dynsym_resolve_code (CORE_ADDR pc)
1285 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
1287 return ops->in_dynsym_resolve_code (pc);
1290 /* Implements the "sharedlibrary" command. */
1293 sharedlibrary_command (char *args, int from_tty)
1296 solib_add (args, from_tty, (struct target_ops *) 0, 1);
1299 /* Implements the command "nosharedlibrary", which discards symbols
1300 that have been auto-loaded from shared libraries. Symbols from
1301 shared libraries that were added by explicit request of the user
1302 are not discarded. Also called from remote.c. */
1305 no_shared_libraries (char *ignored, int from_tty)
1307 /* The order of the two routines below is important: clear_solib notifies
1308 the solib_unloaded observers, and some of these observers might need
1309 access to their associated objfiles. Therefore, we can not purge the
1310 solibs' objfiles before clear_solib has been called. */
1313 objfile_purge_solibs ();
1319 update_solib_breakpoints (void)
1321 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
1323 if (ops->update_breakpoints != NULL)
1324 ops->update_breakpoints ();
1330 handle_solib_event (void)
1332 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
1334 if (ops->handle_event != NULL)
1335 ops->handle_event ();
1337 clear_program_space_solib_cache (current_inferior ()->pspace);
1339 /* Check for any newly added shared libraries if we're supposed to
1340 be adding them automatically. Switch terminal for any messages
1341 produced by breakpoint_re_set. */
1342 target_terminal_ours_for_output ();
1343 solib_add (NULL, 0, ¤t_target, auto_solib_add);
1344 target_terminal_inferior ();
1347 /* Reload shared libraries, but avoid reloading the same symbol file
1348 we already have loaded. */
1351 reload_shared_libraries_1 (int from_tty)
1354 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
1356 if (print_symbol_loading_p (from_tty, 0, 0))
1357 printf_unfiltered (_("Loading symbols for shared libraries.\n"));
1359 for (so = so_list_head; so != NULL; so = so->next)
1361 char *filename, *found_pathname = NULL;
1363 int was_loaded = so->symbols_loaded;
1365 SYMFILE_DEFER_BP_RESET | (from_tty ? SYMFILE_VERBOSE : 0);
1367 filename = tilde_expand (so->so_original_name);
1368 make_cleanup (xfree, filename);
1369 abfd = solib_bfd_open (filename);
1372 found_pathname = xstrdup (bfd_get_filename (abfd));
1373 make_cleanup (xfree, found_pathname);
1374 gdb_bfd_unref (abfd);
1377 /* If this shared library is no longer associated with its previous
1378 symbol file, close that. */
1379 if ((found_pathname == NULL && was_loaded)
1380 || (found_pathname != NULL
1381 && filename_cmp (found_pathname, so->so_name) != 0))
1383 if (so->objfile && ! (so->objfile->flags & OBJF_USERLOADED)
1384 && !solib_used (so))
1385 free_objfile (so->objfile);
1386 remove_target_sections (so);
1390 /* If this shared library is now associated with a new symbol
1392 if (found_pathname != NULL
1394 || filename_cmp (found_pathname, so->so_name) != 0))
1400 solib_map_sections (so);
1403 CATCH (e, RETURN_MASK_ERROR)
1405 exception_fprintf (gdb_stderr, e,
1406 _("Error while mapping "
1407 "shared library sections:\n"));
1413 && (auto_solib_add || was_loaded || libpthread_solib_p (so)))
1414 solib_read_symbols (so, flags);
1418 do_cleanups (old_chain);
1422 reload_shared_libraries (char *ignored, int from_tty,
1423 struct cmd_list_element *e)
1425 const struct target_so_ops *ops;
1427 reload_shared_libraries_1 (from_tty);
1429 ops = solib_ops (target_gdbarch ());
1431 /* Creating inferior hooks here has two purposes. First, if we reload
1432 shared libraries then the address of solib breakpoint we've computed
1433 previously might be no longer valid. For example, if we forgot to set
1434 solib-absolute-prefix and are setting it right now, then the previous
1435 breakpoint address is plain wrong. Second, installing solib hooks
1436 also implicitly figures were ld.so is and loads symbols for it.
1437 Absent this call, if we've just connected to a target and set
1438 solib-absolute-prefix or solib-search-path, we'll lose all information
1440 if (target_has_execution)
1442 /* Reset or free private data structures not associated with
1444 ops->clear_solib ();
1446 /* Remove any previous solib event breakpoint. This is usually
1447 done in common code, at breakpoint_init_inferior time, but
1448 we're not really starting up the inferior here. */
1449 remove_solib_event_breakpoints ();
1451 solib_create_inferior_hook (from_tty);
1454 /* Sometimes the platform-specific hook loads initial shared
1455 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be
1456 incorrectly 0 but such solib targets should be fixed anyway. If we
1457 made all the inferior hook methods consistent, this call could be
1458 removed. Call it only after the solib target has been initialized by
1459 solib_create_inferior_hook. */
1461 solib_add (NULL, 0, NULL, auto_solib_add);
1463 breakpoint_re_set ();
1465 /* We may have loaded or unloaded debug info for some (or all)
1466 shared libraries. However, frames may still reference them. For
1467 example, a frame's unwinder might still point at DWARF FDE
1468 structures that are now freed. Also, getting new symbols may
1469 change our opinion about what is frameless. */
1470 reinit_frame_cache ();
1472 ops->special_symbol_handling ();
1475 /* Wrapper for reload_shared_libraries that replaces "remote:"
1476 at the start of gdb_sysroot with "target:". */
1479 gdb_sysroot_changed (char *ignored, int from_tty,
1480 struct cmd_list_element *e)
1482 const char *old_prefix = "remote:";
1483 const char *new_prefix = TARGET_SYSROOT_PREFIX;
1485 if (startswith (gdb_sysroot, old_prefix))
1487 static int warning_issued = 0;
1489 gdb_assert (strlen (old_prefix) == strlen (new_prefix));
1490 memcpy (gdb_sysroot, new_prefix, strlen (new_prefix));
1492 if (!warning_issued)
1494 warning (_("\"%s\" is deprecated, use \"%s\" instead."),
1495 old_prefix, new_prefix);
1496 warning (_("sysroot set to \"%s\"."), gdb_sysroot);
1502 reload_shared_libraries (ignored, from_tty, e);
1506 show_auto_solib_add (struct ui_file *file, int from_tty,
1507 struct cmd_list_element *c, const char *value)
1509 fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"),
1514 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1515 the library-specific handler if it is installed for the current target. */
1518 solib_global_lookup (struct objfile *objfile,
1520 const domain_enum domain)
1522 const struct target_so_ops *ops = solib_ops (target_gdbarch ());
1524 if (ops->lookup_lib_global_symbol != NULL)
1525 return ops->lookup_lib_global_symbol (objfile, name, domain);
1526 return (struct block_symbol) {NULL, NULL};
1529 /* Lookup the value for a specific symbol from dynamic symbol table. Look
1530 up symbol from ABFD. MATCH_SYM is a callback function to determine
1531 whether to pick up a symbol. DATA is the input of this callback
1532 function. Return NULL if symbol is not found. */
1535 gdb_bfd_lookup_symbol_from_symtab (bfd *abfd,
1536 int (*match_sym) (const asymbol *,
1540 long storage_needed = bfd_get_symtab_upper_bound (abfd);
1541 CORE_ADDR symaddr = 0;
1543 if (storage_needed > 0)
1547 asymbol **symbol_table = (asymbol **) xmalloc (storage_needed);
1548 struct cleanup *back_to = make_cleanup (xfree, symbol_table);
1549 unsigned int number_of_symbols =
1550 bfd_canonicalize_symtab (abfd, symbol_table);
1552 for (i = 0; i < number_of_symbols; i++)
1554 asymbol *sym = *symbol_table++;
1556 if (match_sym (sym, data))
1558 struct gdbarch *gdbarch = target_gdbarch ();
1559 symaddr = sym->value;
1561 /* Some ELF targets fiddle with addresses of symbols they
1562 consider special. They use minimal symbols to do that
1563 and this is needed for correct breakpoint placement,
1564 but we do not have full data here to build a complete
1565 minimal symbol, so just set the address and let the
1566 targets cope with that. */
1567 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1568 && gdbarch_elf_make_msymbol_special_p (gdbarch))
1570 struct minimal_symbol msym;
1572 memset (&msym, 0, sizeof (msym));
1573 SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr);
1574 gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym);
1575 symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym);
1578 /* BFD symbols are section relative. */
1579 symaddr += sym->section->vma;
1583 do_cleanups (back_to);
1589 /* Lookup the value for a specific symbol from symbol table. Look up symbol
1590 from ABFD. MATCH_SYM is a callback function to determine whether to pick
1591 up a symbol. DATA is the input of this callback function. Return NULL
1592 if symbol is not found. */
1595 bfd_lookup_symbol_from_dyn_symtab (bfd *abfd,
1596 int (*match_sym) (const asymbol *,
1600 long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd);
1601 CORE_ADDR symaddr = 0;
1603 if (storage_needed > 0)
1606 asymbol **symbol_table = (asymbol **) xmalloc (storage_needed);
1607 struct cleanup *back_to = make_cleanup (xfree, symbol_table);
1608 unsigned int number_of_symbols =
1609 bfd_canonicalize_dynamic_symtab (abfd, symbol_table);
1611 for (i = 0; i < number_of_symbols; i++)
1613 asymbol *sym = *symbol_table++;
1615 if (match_sym (sym, data))
1617 /* BFD symbols are section relative. */
1618 symaddr = sym->value + sym->section->vma;
1622 do_cleanups (back_to);
1627 /* Lookup the value for a specific symbol from symbol table and dynamic
1628 symbol table. Look up symbol from ABFD. MATCH_SYM is a callback
1629 function to determine whether to pick up a symbol. DATA is the
1630 input of this callback function. Return NULL if symbol is not
1634 gdb_bfd_lookup_symbol (bfd *abfd,
1635 int (*match_sym) (const asymbol *, const void *),
1638 CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data);
1640 /* On FreeBSD, the dynamic linker is stripped by default. So we'll
1641 have to check the dynamic string table too. */
1643 symaddr = bfd_lookup_symbol_from_dyn_symtab (abfd, match_sym, data);
1648 /* SO_LIST_HEAD may contain user-loaded object files that can be removed
1649 out-of-band by the user. So upon notification of free_objfile remove
1650 all references to any user-loaded file that is about to be freed. */
1653 remove_user_added_objfile (struct objfile *objfile)
1657 if (objfile != 0 && objfile->flags & OBJF_USERLOADED)
1659 for (so = so_list_head; so != NULL; so = so->next)
1660 if (so->objfile == objfile)
1665 extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */
1668 _initialize_solib (void)
1670 solib_data = gdbarch_data_register_pre_init (solib_init);
1672 observer_attach_free_objfile (remove_user_added_objfile);
1674 add_com ("sharedlibrary", class_files, sharedlibrary_command,
1675 _("Load shared object library symbols for files matching REGEXP."));
1676 add_info ("sharedlibrary", info_sharedlibrary_command,
1677 _("Status of loaded shared object libraries."));
1678 add_info_alias ("dll", "sharedlibrary", 1);
1679 add_com ("nosharedlibrary", class_files, no_shared_libraries,
1680 _("Unload all shared object library symbols."));
1682 add_setshow_boolean_cmd ("auto-solib-add", class_support,
1683 &auto_solib_add, _("\
1684 Set autoloading of shared library symbols."), _("\
1685 Show autoloading of shared library symbols."), _("\
1686 If \"on\", symbols from all shared object libraries will be loaded\n\
1687 automatically when the inferior begins execution, when the dynamic linker\n\
1688 informs gdb that a new library has been loaded, or when attaching to the\n\
1689 inferior. Otherwise, symbols must be loaded manually, using \
1692 show_auto_solib_add,
1693 &setlist, &showlist);
1695 add_setshow_optional_filename_cmd ("sysroot", class_support,
1697 Set an alternate system root."), _("\
1698 Show the current system root."), _("\
1699 The system root is used to load absolute shared library symbol files.\n\
1700 For other (relative) files, you can add directories using\n\
1701 `set solib-search-path'."),
1702 gdb_sysroot_changed,
1704 &setlist, &showlist);
1706 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
1708 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
1711 add_setshow_optional_filename_cmd ("solib-search-path", class_support,
1712 &solib_search_path, _("\
1713 Set the search path for loading non-absolute shared library symbol files."),
1715 Show the search path for loading non-absolute shared library symbol files."),
1717 This takes precedence over the environment variables \
1718 PATH and LD_LIBRARY_PATH."),
1719 reload_shared_libraries,
1720 show_solib_search_path,
1721 &setlist, &showlist);