1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2005, 2006
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
26 #include <sys/types.h>
28 #include "gdb_string.h"
33 #include "exceptions.h"
38 #include "gdb_regex.h"
43 #include "completer.h"
44 #include "filenames.h" /* for DOSish file names */
48 #include "readline/readline.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 struct target_so_ops *
66 solib_ops (struct gdbarch *gdbarch)
68 struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data);
73 /* external data declarations */
75 /* FIXME: gdbarch needs to control this variable */
76 struct target_so_ops *current_target_so_ops;
78 /* local data declarations */
80 static struct so_list *so_list_head; /* List of known shared objects */
82 static int solib_cleanup_queued = 0; /* make_run_cleanup called */
84 /* Local function prototypes */
86 static void do_clear_solib (void *);
88 /* If non-empty, this is a search path for loading non-absolute shared library
89 symbol files. This takes precedence over the environment variables PATH
90 and LD_LIBRARY_PATH. */
91 static char *solib_search_path = NULL;
93 show_solib_search_path (struct ui_file *file, int from_tty,
94 struct cmd_list_element *c, const char *value)
96 fprintf_filtered (file, _("\
97 The search path for loading non-absolute shared library symbol files is %s.\n"),
105 solib_open -- Find a shared library file and open it.
109 int solib_open (char *in_patname, char **found_pathname);
113 Global variable GDB_SYSROOT is used as a prefix directory
114 to search for shared libraries if they have an absolute path.
116 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
117 (or set of directories, as in LD_LIBRARY_PATH) to search for all
118 shared libraries if not found in GDB_SYSROOT.
121 * If there is a gdb_sysroot and path is absolute:
122 * Search for gdb_sysroot/path.
124 * Look for it literally (unmodified).
125 * Look in SOLIB_SEARCH_PATH.
126 * If available, use target defined search function.
127 * If gdb_sysroot is NOT set, perform the following two searches:
128 * Look in inferior's $PATH.
129 * Look in inferior's $LD_LIBRARY_PATH.
131 * The last check avoids doing this search when targetting remote
132 * machines since gdb_sysroot will almost always be set.
136 file handle for opened solib, or -1 for failure. */
139 solib_open (char *in_pathname, char **found_pathname)
141 struct target_so_ops *ops = solib_ops (current_gdbarch);
143 char *temp_pathname = NULL;
144 char *p = in_pathname;
145 int gdb_sysroot_is_empty;
147 gdb_sysroot_is_empty = (gdb_sysroot == NULL || *gdb_sysroot == 0);
149 if (! IS_ABSOLUTE_PATH (in_pathname) || gdb_sysroot_is_empty)
150 temp_pathname = in_pathname;
153 int prefix_len = strlen (gdb_sysroot);
155 /* Remove trailing slashes from absolute prefix. */
156 while (prefix_len > 0
157 && IS_DIR_SEPARATOR (gdb_sysroot[prefix_len - 1]))
160 /* Cat the prefixed pathname together. */
161 temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1);
162 strncpy (temp_pathname, gdb_sysroot, prefix_len);
163 temp_pathname[prefix_len] = '\0';
164 strcat (temp_pathname, in_pathname);
167 /* Now see if we can open it. */
168 found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0);
170 /* If the search in gdb_sysroot failed, and the path name is
171 absolute at this point, make it relative. (openp will try and open the
172 file according to its absolute path otherwise, which is not what we want.)
173 Affects subsequent searches for this solib. */
174 if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname))
176 /* First, get rid of any drive letters etc. */
177 while (!IS_DIR_SEPARATOR (*in_pathname))
180 /* Next, get rid of all leading dir separators. */
181 while (IS_DIR_SEPARATOR (*in_pathname))
185 /* If not found, search the solib_search_path (if any). */
186 if (found_file < 0 && solib_search_path != NULL)
187 found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
188 in_pathname, O_RDONLY | O_BINARY, 0, &temp_pathname);
190 /* If not found, next search the solib_search_path (if any) for the basename
191 only (ignoring the path). This is to allow reading solibs from a path
192 that differs from the opened path. */
193 if (found_file < 0 && solib_search_path != NULL)
194 found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
195 lbasename (in_pathname), O_RDONLY | O_BINARY, 0,
198 /* If not found, try to use target supplied solib search method */
199 if (found_file < 0 && ops->find_and_open_solib)
200 found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY,
203 /* If not found, next search the inferior's $PATH environment variable. */
204 if (found_file < 0 && gdb_sysroot_is_empty)
205 found_file = openp (get_in_environ (inferior_environ, "PATH"),
206 OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
209 /* If not found, next search the inferior's $LD_LIBRARY_PATH
210 environment variable. */
211 if (found_file < 0 && gdb_sysroot_is_empty)
212 found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"),
213 OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
216 /* Done. If not found, tough luck. Return found_file and
217 (optionally) found_pathname. */
218 if (found_pathname != NULL && temp_pathname != NULL)
219 *found_pathname = xstrdup (temp_pathname);
228 solib_map_sections -- open bfd and build sections for shared lib
232 static int solib_map_sections (struct so_list *so)
236 Given a pointer to one of the shared objects in our list
237 of mapped objects, use the recorded name to open a bfd
238 descriptor for the object, build a section table, and then
239 relocate all the section addresses by the base address at
240 which the shared object was mapped.
244 In most (all?) cases the shared object file name recorded in the
245 dynamic linkage tables will be a fully qualified pathname. For
246 cases where it isn't, do we really mimic the systems search
247 mechanism correctly in the below code (particularly the tilde
252 solib_map_sections (void *arg)
254 struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */
256 char *scratch_pathname;
258 struct section_table *p;
259 struct cleanup *old_chain;
262 filename = tilde_expand (so->so_name);
264 old_chain = make_cleanup (xfree, filename);
265 scratch_chan = solib_open (filename, &scratch_pathname);
267 if (scratch_chan < 0)
269 perror_with_name (filename);
272 /* Leave scratch_pathname allocated. abfd->name will point to it. */
273 abfd = bfd_fopen (scratch_pathname, gnutarget, FOPEN_RB, scratch_chan);
276 close (scratch_chan);
277 error (_("Could not open `%s' as an executable file: %s"),
278 scratch_pathname, bfd_errmsg (bfd_get_error ()));
281 /* Leave bfd open, core_xfer_memory and "info files" need it. */
283 bfd_set_cacheable (abfd, 1);
285 /* copy full path name into so_name, so that later symbol_file_add
287 if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE)
288 error (_("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure."));
289 strcpy (so->so_name, scratch_pathname);
291 if (!bfd_check_format (abfd, bfd_object))
293 error (_("\"%s\": not in executable format: %s."),
294 scratch_pathname, bfd_errmsg (bfd_get_error ()));
296 if (build_section_table (abfd, &so->sections, &so->sections_end))
298 error (_("Can't find the file sections in `%s': %s"),
299 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
302 for (p = so->sections; p < so->sections_end; p++)
304 struct target_so_ops *ops = solib_ops (current_gdbarch);
306 /* Relocate the section binding addresses as recorded in the shared
307 object's file by the base address to which the object was actually
309 ops->relocate_section_addresses (so, p);
310 if (strcmp (p->the_bfd_section->name, ".text") == 0)
316 /* Free the file names, close the file now. */
317 do_cleanups (old_chain);
324 free_so --- free a `struct so_list' object
328 void free_so (struct so_list *so)
332 Free the storage associated with the `struct so_list' object SO.
333 If we have opened a BFD for SO, close it.
335 The caller is responsible for removing SO from whatever list it is
336 a member of. If we have placed SO's sections in some target's
337 section table, the caller is responsible for removing them.
339 This function doesn't mess with objfiles at all. If there is an
340 objfile associated with SO that needs to be removed, the caller is
341 responsible for taking care of that. */
344 free_so (struct so_list *so)
346 struct target_so_ops *ops = solib_ops (current_gdbarch);
347 char *bfd_filename = 0;
350 xfree (so->sections);
354 bfd_filename = bfd_get_filename (so->abfd);
355 if (! bfd_close (so->abfd))
356 warning (_("cannot close \"%s\": %s"),
357 bfd_filename, bfd_errmsg (bfd_get_error ()));
361 xfree (bfd_filename);
369 /* Return address of first so_list entry in master shared object list. */
371 master_so_list (void)
377 /* A small stub to get us past the arg-passing pinhole of catch_errors. */
380 symbol_add_stub (void *arg)
382 struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
383 struct section_addr_info *sap;
385 /* Have we already loaded this shared object? */
386 ALL_OBJFILES (so->objfile)
388 if (strcmp (so->objfile->name, so->so_name) == 0)
392 sap = build_section_addr_info_from_section_table (so->sections,
395 so->objfile = symbol_file_add (so->so_name, so->from_tty,
396 sap, 0, OBJF_SHARED);
397 free_section_addr_info (sap);
402 /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be
403 chatty about it. Return non-zero if any symbols were actually
407 solib_read_symbols (struct so_list *so, int from_tty)
409 if (so->symbols_loaded)
412 printf_unfiltered (_("Symbols already loaded for %s\n"), so->so_name);
414 else if (so->abfd == NULL)
417 printf_unfiltered (_("Symbol file not found for %s\n"), so->so_name);
421 if (catch_errors (symbol_add_stub, so,
422 "Error while reading shared library symbols:\n",
426 printf_unfiltered (_("Loaded symbols for %s\n"), so->so_name);
427 so->symbols_loaded = 1;
437 update_solib_list --- synchronize GDB's shared object list with inferior's
441 void update_solib_list (int from_tty, struct target_ops *TARGET)
443 Extract the list of currently loaded shared objects from the
444 inferior, and compare it with the list of shared objects currently
445 in GDB's so_list_head list. Edit so_list_head to bring it in sync
446 with the inferior's new list.
448 If we notice that the inferior has unloaded some shared objects,
449 free any symbolic info GDB had read about those shared objects.
451 Don't load symbolic info for any new shared objects; just add them
452 to the list, and leave their symbols_loaded flag clear.
454 If FROM_TTY is non-null, feel free to print messages about what
457 If TARGET is non-null, add the sections of all new shared objects
458 to TARGET's section table. Note that this doesn't remove any
459 sections for shared objects that have been unloaded, and it
460 doesn't check to see if the new shared objects are already present in
461 the section table. But we only use this for core files and
462 processes we've just attached to, so that's okay. */
465 update_solib_list (int from_tty, struct target_ops *target)
467 struct target_so_ops *ops = solib_ops (current_gdbarch);
468 struct so_list *inferior = ops->current_sos();
469 struct so_list *gdb, **gdb_link;
471 /* If we are attaching to a running process for which we
472 have not opened a symbol file, we may be able to get its
475 symfile_objfile == NULL)
476 catch_errors (ops->open_symbol_file_object, &from_tty,
477 "Error reading attached process's symbol file.\n",
480 /* Since this function might actually add some elements to the
481 so_list_head list, arrange for it to be cleaned up when
483 if (!solib_cleanup_queued)
485 make_run_cleanup (do_clear_solib, NULL);
486 solib_cleanup_queued = 1;
489 /* GDB and the inferior's dynamic linker each maintain their own
490 list of currently loaded shared objects; we want to bring the
491 former in sync with the latter. Scan both lists, seeing which
492 shared objects appear where. There are three cases:
494 - A shared object appears on both lists. This means that GDB
495 knows about it already, and it's still loaded in the inferior.
496 Nothing needs to happen.
498 - A shared object appears only on GDB's list. This means that
499 the inferior has unloaded it. We should remove the shared
500 object from GDB's tables.
502 - A shared object appears only on the inferior's list. This
503 means that it's just been loaded. We should add it to GDB's
506 So we walk GDB's list, checking each entry to see if it appears
507 in the inferior's list too. If it does, no action is needed, and
508 we remove it from the inferior's list. If it doesn't, the
509 inferior has unloaded it, and we remove it from GDB's list. By
510 the time we're done walking GDB's list, the inferior's list
511 contains only the new shared objects, which we then add. */
514 gdb_link = &so_list_head;
517 struct so_list *i = inferior;
518 struct so_list **i_link = &inferior;
520 /* Check to see whether the shared object *gdb also appears in
521 the inferior's current list. */
524 if (! strcmp (gdb->so_original_name, i->so_original_name))
531 /* If the shared object appears on the inferior's list too, then
532 it's still loaded, so we don't need to do anything. Delete
533 it from the inferior's list, and leave it on GDB's list. */
538 gdb_link = &gdb->next;
542 /* If it's not on the inferior's list, remove it from GDB's tables. */
545 /* Notify any observer that the shared object has been
546 unloaded before we remove it from GDB's tables. */
547 observer_notify_solib_unloaded (gdb);
549 *gdb_link = gdb->next;
551 /* Unless the user loaded it explicitly, free SO's objfile. */
552 if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED))
553 free_objfile (gdb->objfile);
555 /* Some targets' section tables might be referring to
556 sections from so->abfd; remove them. */
557 remove_target_sections (gdb->abfd);
564 /* Now the inferior's list contains only shared objects that don't
565 appear in GDB's list --- those that are newly loaded. Add them
566 to GDB's shared object list. */
571 /* Add the new shared objects to GDB's list. */
572 *gdb_link = inferior;
574 /* Fill in the rest of each of the `struct so_list' nodes. */
575 for (i = inferior; i; i = i->next)
577 i->from_tty = from_tty;
579 /* Fill in the rest of the `struct so_list' node. */
580 catch_errors (solib_map_sections, i,
581 "Error while mapping shared library sections:\n",
584 /* If requested, add the shared object's sections to the TARGET's
585 section table. Do this immediately after mapping the object so
586 that later nodes in the list can query this object, as is needed
590 int count = (i->sections_end - i->sections);
593 int space = target_resize_to_sections (target, count);
594 memcpy (target->to_sections + space,
596 count * sizeof (i->sections[0]));
600 /* Notify any observer that the shared object has been
601 loaded now that we've added it to GDB's tables. */
602 observer_notify_solib_loaded (i);
607 /* Return non-zero if SO is the libpthread shared library.
609 Uses a fairly simplistic heuristic approach where we check
610 the file name against "/libpthread". This can lead to false
611 positives, but this should be good enough in practice. */
614 libpthread_solib_p (struct so_list *so)
616 return (strstr (so->so_name, "/libpthread") != NULL);
621 solib_add -- read in symbol info for newly added shared libraries
625 void solib_add (char *pattern, int from_tty, struct target_ops
626 *TARGET, int readsyms)
630 Read in symbolic information for any shared objects whose names
631 match PATTERN. (If we've already read a shared object's symbol
632 info, leave it alone.) If PATTERN is zero, read them all.
634 If READSYMS is 0, defer reading symbolic information until later
635 but still do any needed low level processing.
637 FROM_TTY and TARGET are as described for update_solib_list, above. */
640 solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms)
646 char *re_err = re_comp (pattern);
649 error (_("Invalid regexp: %s"), re_err);
652 update_solib_list (from_tty, target);
654 /* Walk the list of currently loaded shared libraries, and read
655 symbols for any that match the pattern --- or any whose symbols
656 aren't already loaded, if no pattern was given. */
659 int loaded_any_symbols = 0;
661 for (gdb = so_list_head; gdb; gdb = gdb->next)
662 if (! pattern || re_exec (gdb->so_name))
664 /* Normally, we would read the symbols from that library
665 only if READSYMS is set. However, we're making a small
666 exception for the pthread library, because we sometimes
667 need the library symbols to be loaded in order to provide
668 thread support (x86-linux for instance). */
669 const int add_this_solib =
670 (readsyms || libpthread_solib_p (gdb));
673 if (add_this_solib && solib_read_symbols (gdb, from_tty))
674 loaded_any_symbols = 1;
677 if (from_tty && pattern && ! any_matches)
679 ("No loaded shared libraries match the pattern `%s'.\n", pattern);
681 if (loaded_any_symbols)
683 struct target_so_ops *ops = solib_ops (current_gdbarch);
685 /* Getting new symbols may change our opinion about what is
687 reinit_frame_cache ();
689 ops->special_symbol_handling ();
699 info_sharedlibrary_command -- code for "info sharedlibrary"
703 static void info_sharedlibrary_command ()
707 Walk through the shared library list and print information
708 about each attached library.
712 info_sharedlibrary_command (char *ignore, int from_tty)
714 struct so_list *so = NULL; /* link map state variable */
718 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
719 addr_width = 4 + (TARGET_PTR_BIT / 4);
721 update_solib_list (from_tty, 0);
723 for (so = so_list_head; so; so = so->next)
729 printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From",
730 addr_width, "To", "Syms Read",
731 "Shared Object Library");
735 printf_unfiltered ("%-*s", addr_width,
736 so->textsection != NULL
737 ? hex_string_custom (
738 (LONGEST) so->textsection->addr,
741 printf_unfiltered ("%-*s", addr_width,
742 so->textsection != NULL
743 ? hex_string_custom (
744 (LONGEST) so->textsection->endaddr,
747 printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No");
748 printf_unfiltered ("%s\n", so->so_name);
751 if (so_list_head == NULL)
753 printf_unfiltered (_("No shared libraries loaded at this time.\n"));
761 solib_address -- check to see if an address is in a shared lib
765 char * solib_address (CORE_ADDR address)
769 Provides a hook for other gdb routines to discover whether or
770 not a particular address is within the mapped address space of
773 For example, this routine is called at one point to disable
774 breakpoints which are in shared libraries that are not currently
779 solib_address (CORE_ADDR address)
781 struct so_list *so = 0; /* link map state variable */
783 for (so = so_list_head; so; so = so->next)
785 struct section_table *p;
787 for (p = so->sections; p < so->sections_end; p++)
789 if (p->addr <= address && address < p->endaddr)
790 return (so->so_name);
797 /* Called by free_all_symtabs */
802 struct target_so_ops *ops = solib_ops (current_gdbarch);
804 /* This function is expected to handle ELF shared libraries. It is
805 also used on Solaris, which can run either ELF or a.out binaries
806 (for compatibility with SunOS 4), both of which can use shared
807 libraries. So we don't know whether we have an ELF executable or
808 an a.out executable until the user chooses an executable file.
810 ELF shared libraries don't get mapped into the address space
811 until after the program starts, so we'd better not try to insert
812 breakpoints in them immediately. We have to wait until the
813 dynamic linker has loaded them; we'll hit a bp_shlib_event
814 breakpoint (look for calls to create_solib_event_breakpoint) when
817 SunOS shared libraries seem to be different --- they're present
818 as soon as the process begins execution, so there's no need to
819 put off inserting breakpoints. There's also nowhere to put a
820 bp_shlib_event breakpoint, so if we put it off, we'll never get
823 So: disable breakpoints only if we're using ELF shared libs. */
825 && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour)
826 disable_breakpoints_in_shlibs (1);
830 struct so_list *so = so_list_head;
831 so_list_head = so->next;
833 remove_target_sections (so->abfd);
841 do_clear_solib (void *dummy)
843 solib_cleanup_queued = 0;
849 solib_create_inferior_hook -- shared library startup support
853 void solib_create_inferior_hook ()
857 When gdb starts up the inferior, it nurses it along (through the
858 shell) until it is ready to execute it's first instruction. At this
859 point, this function gets called via expansion of the macro
860 SOLIB_CREATE_INFERIOR_HOOK. */
863 solib_create_inferior_hook (void)
865 struct target_so_ops *ops = solib_ops (current_gdbarch);
866 ops->solib_create_inferior_hook();
871 in_solib_dynsym_resolve_code -- check to see if an address is in
872 dynamic loader's dynamic symbol
877 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
881 Determine if PC is in the dynamic linker's symbol resolution
882 code. Return 1 if so, 0 otherwise.
886 in_solib_dynsym_resolve_code (CORE_ADDR pc)
888 struct target_so_ops *ops = solib_ops (current_gdbarch);
889 return ops->in_dynsym_resolve_code (pc);
896 sharedlibrary_command -- handle command to explicitly add library
900 static void sharedlibrary_command (char *args, int from_tty)
907 sharedlibrary_command (char *args, int from_tty)
910 solib_add (args, from_tty, (struct target_ops *) 0, 1);
915 no_shared_libraries -- handle command to explicitly discard symbols
916 from shared libraries.
920 Implements the command "nosharedlibrary", which discards symbols
921 that have been auto-loaded from shared libraries. Symbols from
922 shared libraries that were added by explicit request of the user
923 are not discarded. Also called from remote.c. */
926 no_shared_libraries (char *ignored, int from_tty)
928 objfile_purge_solibs ();
929 do_clear_solib (NULL);
933 reload_shared_libraries (char *ignored, int from_tty,
934 struct cmd_list_element *e)
936 no_shared_libraries (NULL, from_tty);
937 solib_add (NULL, from_tty, NULL, auto_solib_add);
941 show_auto_solib_add (struct ui_file *file, int from_tty,
942 struct cmd_list_element *c, const char *value)
944 fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"),
949 extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */
952 _initialize_solib (void)
954 struct cmd_list_element *c;
956 solib_data = gdbarch_data_register_pre_init (solib_init);
958 add_com ("sharedlibrary", class_files, sharedlibrary_command,
959 _("Load shared object library symbols for files matching REGEXP."));
960 add_info ("sharedlibrary", info_sharedlibrary_command,
961 _("Status of loaded shared object libraries."));
962 add_com ("nosharedlibrary", class_files, no_shared_libraries,
963 _("Unload all shared object library symbols."));
965 add_setshow_boolean_cmd ("auto-solib-add", class_support,
966 &auto_solib_add, _("\
967 Set autoloading of shared library symbols."), _("\
968 Show autoloading of shared library symbols."), _("\
969 If \"on\", symbols from all shared object libraries will be loaded\n\
970 automatically when the inferior begins execution, when the dynamic linker\n\
971 informs gdb that a new library has been loaded, or when attaching to the\n\
972 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
975 &setlist, &showlist);
977 add_setshow_filename_cmd ("sysroot", class_support,
979 Set an alternate system root."), _("\
980 Show the current system root."), _("\
981 The system root is used to load absolute shared library symbol files.\n\
982 For other (relative) files, you can add directories using\n\
983 `set solib-search-path'."),
984 reload_shared_libraries,
986 &setlist, &showlist);
988 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
990 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
993 add_setshow_optional_filename_cmd ("solib-search-path", class_support,
994 &solib_search_path, _("\
995 Set the search path for loading non-absolute shared library symbol files."), _("\
996 Show the search path for loading non-absolute shared library symbol files."), _("\
997 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
998 reload_shared_libraries,
999 show_solib_search_path,
1000 &setlist, &showlist);