1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2005, 2006, 2007 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
25 #include <sys/types.h>
27 #include "gdb_string.h"
32 #include "exceptions.h"
37 #include "gdb_regex.h"
42 #include "completer.h"
43 #include "filenames.h" /* for DOSish file names */
47 #include "readline/readline.h"
49 /* Architecture-specific operations. */
51 /* Per-architecture data key. */
52 static struct gdbarch_data *solib_data;
55 solib_init (struct obstack *obstack)
57 struct target_so_ops **ops;
59 ops = OBSTACK_ZALLOC (obstack, struct target_so_ops *);
60 *ops = current_target_so_ops;
64 static struct target_so_ops *
65 solib_ops (struct gdbarch *gdbarch)
67 struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data);
71 /* Set the solib operations for GDBARCH to NEW_OPS. */
74 set_solib_ops (struct gdbarch *gdbarch, struct target_so_ops *new_ops)
76 struct target_so_ops **ops = gdbarch_data (gdbarch, solib_data);
81 /* external data declarations */
83 /* FIXME: gdbarch needs to control this variable, or else every
84 configuration needs to call set_solib_ops. */
85 struct target_so_ops *current_target_so_ops;
87 /* local data declarations */
89 static struct so_list *so_list_head; /* List of known shared objects */
91 static int solib_cleanup_queued = 0; /* make_run_cleanup called */
93 /* Local function prototypes */
95 static void do_clear_solib (void *);
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, _("\
106 The search path for loading non-absolute shared library symbol files is %s.\n"),
114 solib_open -- Find a shared library file and open it.
118 int solib_open (char *in_patname, char **found_pathname);
122 Global variable GDB_SYSROOT is used as a prefix directory
123 to search for shared libraries if they have an absolute path.
125 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
126 (or set of directories, as in LD_LIBRARY_PATH) to search for all
127 shared libraries if not found in GDB_SYSROOT.
130 * If there is a gdb_sysroot and path is absolute:
131 * Search for gdb_sysroot/path.
133 * Look for it literally (unmodified).
134 * Look in SOLIB_SEARCH_PATH.
135 * If available, use target defined search function.
136 * If gdb_sysroot is NOT set, perform the following two searches:
137 * Look in inferior's $PATH.
138 * Look in inferior's $LD_LIBRARY_PATH.
140 * The last check avoids doing this search when targetting remote
141 * machines since gdb_sysroot will almost always be set.
145 file handle for opened solib, or -1 for failure. */
148 solib_open (char *in_pathname, char **found_pathname)
150 struct target_so_ops *ops = solib_ops (current_gdbarch);
152 char *temp_pathname = NULL;
153 char *p = in_pathname;
154 int gdb_sysroot_is_empty;
156 gdb_sysroot_is_empty = (gdb_sysroot == NULL || *gdb_sysroot == 0);
158 if (! IS_ABSOLUTE_PATH (in_pathname) || gdb_sysroot_is_empty)
159 temp_pathname = in_pathname;
162 int prefix_len = strlen (gdb_sysroot);
164 /* Remove trailing slashes from absolute prefix. */
165 while (prefix_len > 0
166 && IS_DIR_SEPARATOR (gdb_sysroot[prefix_len - 1]))
169 /* Cat the prefixed pathname together. */
170 temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1);
171 strncpy (temp_pathname, gdb_sysroot, prefix_len);
172 temp_pathname[prefix_len] = '\0';
173 strcat (temp_pathname, in_pathname);
176 /* Now see if we can open it. */
177 found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0);
179 /* We try to find the library in various ways. After each attempt
180 (except for the one above), either found_file >= 0 and
181 temp_pathname is a malloc'd string, or found_file < 0 and
182 temp_pathname does not point to storage that needs to be
186 temp_pathname = NULL;
188 temp_pathname = xstrdup (temp_pathname);
190 /* If the search in gdb_sysroot failed, and the path name is
191 absolute at this point, make it relative. (openp will try and open the
192 file according to its absolute path otherwise, which is not what we want.)
193 Affects subsequent searches for this solib. */
194 if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname))
196 /* First, get rid of any drive letters etc. */
197 while (!IS_DIR_SEPARATOR (*in_pathname))
200 /* Next, get rid of all leading dir separators. */
201 while (IS_DIR_SEPARATOR (*in_pathname))
205 /* If not found, search the solib_search_path (if any). */
206 if (found_file < 0 && solib_search_path != NULL)
207 found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
208 in_pathname, O_RDONLY | O_BINARY, 0, &temp_pathname);
210 /* If not found, next search the solib_search_path (if any) for the basename
211 only (ignoring the path). This is to allow reading solibs from a path
212 that differs from the opened path. */
213 if (found_file < 0 && solib_search_path != NULL)
214 found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
215 lbasename (in_pathname), O_RDONLY | O_BINARY, 0,
218 /* If not found, try to use target supplied solib search method */
219 if (found_file < 0 && ops->find_and_open_solib)
220 found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY,
223 /* If not found, next search the inferior's $PATH environment variable. */
224 if (found_file < 0 && gdb_sysroot_is_empty)
225 found_file = openp (get_in_environ (inferior_environ, "PATH"),
226 OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
229 /* If not found, next search the inferior's $LD_LIBRARY_PATH
230 environment variable. */
231 if (found_file < 0 && gdb_sysroot_is_empty)
232 found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"),
233 OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
236 /* Done. If not found, tough luck. Return found_file and
237 (optionally) found_pathname. */
240 if (found_pathname != NULL)
241 *found_pathname = temp_pathname;
243 xfree (temp_pathname);
253 solib_map_sections -- open bfd and build sections for shared lib
257 static int solib_map_sections (struct so_list *so)
261 Given a pointer to one of the shared objects in our list
262 of mapped objects, use the recorded name to open a bfd
263 descriptor for the object, build a section table, and then
264 relocate all the section addresses by the base address at
265 which the shared object was mapped.
269 In most (all?) cases the shared object file name recorded in the
270 dynamic linkage tables will be a fully qualified pathname. For
271 cases where it isn't, do we really mimic the systems search
272 mechanism correctly in the below code (particularly the tilde
277 solib_map_sections (void *arg)
279 struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */
281 char *scratch_pathname;
283 struct section_table *p;
284 struct cleanup *old_chain;
287 filename = tilde_expand (so->so_name);
289 old_chain = make_cleanup (xfree, filename);
290 scratch_chan = solib_open (filename, &scratch_pathname);
292 if (scratch_chan < 0)
294 perror_with_name (filename);
297 /* Leave scratch_pathname allocated. abfd->name will point to it. */
298 abfd = bfd_fopen (scratch_pathname, gnutarget, FOPEN_RB, scratch_chan);
301 close (scratch_chan);
302 error (_("Could not open `%s' as an executable file: %s"),
303 scratch_pathname, bfd_errmsg (bfd_get_error ()));
306 /* Leave bfd open, core_xfer_memory and "info files" need it. */
308 bfd_set_cacheable (abfd, 1);
310 /* copy full path name into so_name, so that later symbol_file_add
312 if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE)
313 error (_("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure."));
314 strcpy (so->so_name, scratch_pathname);
316 if (!bfd_check_format (abfd, bfd_object))
318 error (_("\"%s\": not in executable format: %s."),
319 scratch_pathname, bfd_errmsg (bfd_get_error ()));
321 if (build_section_table (abfd, &so->sections, &so->sections_end))
323 error (_("Can't find the file sections in `%s': %s"),
324 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
327 for (p = so->sections; p < so->sections_end; p++)
329 struct target_so_ops *ops = solib_ops (current_gdbarch);
331 /* Relocate the section binding addresses as recorded in the shared
332 object's file by the base address to which the object was actually
334 ops->relocate_section_addresses (so, p);
336 /* If the target didn't provide information about the address
337 range of the shared object, assume we want the location of
338 the .text section. */
339 if (so->addr_low == 0 && so->addr_high == 0
340 && strcmp (p->the_bfd_section->name, ".text") == 0)
342 so->addr_low = p->addr;
343 so->addr_high = p->endaddr;
347 /* Free the file names, close the file now. */
348 do_cleanups (old_chain);
355 free_so --- free a `struct so_list' object
359 void free_so (struct so_list *so)
363 Free the storage associated with the `struct so_list' object SO.
364 If we have opened a BFD for SO, close it.
366 The caller is responsible for removing SO from whatever list it is
367 a member of. If we have placed SO's sections in some target's
368 section table, the caller is responsible for removing them.
370 This function doesn't mess with objfiles at all. If there is an
371 objfile associated with SO that needs to be removed, the caller is
372 responsible for taking care of that. */
375 free_so (struct so_list *so)
377 struct target_so_ops *ops = solib_ops (current_gdbarch);
378 char *bfd_filename = 0;
381 xfree (so->sections);
385 bfd_filename = bfd_get_filename (so->abfd);
386 if (! bfd_close (so->abfd))
387 warning (_("cannot close \"%s\": %s"),
388 bfd_filename, bfd_errmsg (bfd_get_error ()));
392 xfree (bfd_filename);
400 /* Return address of first so_list entry in master shared object list. */
402 master_so_list (void)
408 /* A small stub to get us past the arg-passing pinhole of catch_errors. */
411 symbol_add_stub (void *arg)
413 struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
414 struct section_addr_info *sap;
416 /* Have we already loaded this shared object? */
417 ALL_OBJFILES (so->objfile)
419 if (strcmp (so->objfile->name, so->so_name) == 0)
423 sap = build_section_addr_info_from_section_table (so->sections,
426 so->objfile = symbol_file_add (so->so_name, so->from_tty,
427 sap, 0, OBJF_SHARED);
428 free_section_addr_info (sap);
433 /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be
434 chatty about it. Return non-zero if any symbols were actually
438 solib_read_symbols (struct so_list *so, int from_tty)
440 if (so->symbols_loaded)
443 printf_unfiltered (_("Symbols already loaded for %s\n"), so->so_name);
445 else if (so->abfd == NULL)
448 printf_unfiltered (_("Symbol file not found for %s\n"), so->so_name);
452 if (catch_errors (symbol_add_stub, so,
453 "Error while reading shared library symbols:\n",
457 printf_unfiltered (_("Loaded symbols for %s\n"), so->so_name);
458 so->symbols_loaded = 1;
468 update_solib_list --- synchronize GDB's shared object list with inferior's
472 void update_solib_list (int from_tty, struct target_ops *TARGET)
474 Extract the list of currently loaded shared objects from the
475 inferior, and compare it with the list of shared objects currently
476 in GDB's so_list_head list. Edit so_list_head to bring it in sync
477 with the inferior's new list.
479 If we notice that the inferior has unloaded some shared objects,
480 free any symbolic info GDB had read about those shared objects.
482 Don't load symbolic info for any new shared objects; just add them
483 to the list, and leave their symbols_loaded flag clear.
485 If FROM_TTY is non-null, feel free to print messages about what
488 If TARGET is non-null, add the sections of all new shared objects
489 to TARGET's section table. Note that this doesn't remove any
490 sections for shared objects that have been unloaded, and it
491 doesn't check to see if the new shared objects are already present in
492 the section table. But we only use this for core files and
493 processes we've just attached to, so that's okay. */
496 update_solib_list (int from_tty, struct target_ops *target)
498 struct target_so_ops *ops = solib_ops (current_gdbarch);
499 struct so_list *inferior = ops->current_sos();
500 struct so_list *gdb, **gdb_link;
502 /* If we are attaching to a running process for which we
503 have not opened a symbol file, we may be able to get its
506 symfile_objfile == NULL)
507 catch_errors (ops->open_symbol_file_object, &from_tty,
508 "Error reading attached process's symbol file.\n",
511 /* Since this function might actually add some elements to the
512 so_list_head list, arrange for it to be cleaned up when
514 if (!solib_cleanup_queued)
516 make_run_cleanup (do_clear_solib, NULL);
517 solib_cleanup_queued = 1;
520 /* GDB and the inferior's dynamic linker each maintain their own
521 list of currently loaded shared objects; we want to bring the
522 former in sync with the latter. Scan both lists, seeing which
523 shared objects appear where. There are three cases:
525 - A shared object appears on both lists. This means that GDB
526 knows about it already, and it's still loaded in the inferior.
527 Nothing needs to happen.
529 - A shared object appears only on GDB's list. This means that
530 the inferior has unloaded it. We should remove the shared
531 object from GDB's tables.
533 - A shared object appears only on the inferior's list. This
534 means that it's just been loaded. We should add it to GDB's
537 So we walk GDB's list, checking each entry to see if it appears
538 in the inferior's list too. If it does, no action is needed, and
539 we remove it from the inferior's list. If it doesn't, the
540 inferior has unloaded it, and we remove it from GDB's list. By
541 the time we're done walking GDB's list, the inferior's list
542 contains only the new shared objects, which we then add. */
545 gdb_link = &so_list_head;
548 struct so_list *i = inferior;
549 struct so_list **i_link = &inferior;
551 /* Check to see whether the shared object *gdb also appears in
552 the inferior's current list. */
555 if (! strcmp (gdb->so_original_name, i->so_original_name))
562 /* If the shared object appears on the inferior's list too, then
563 it's still loaded, so we don't need to do anything. Delete
564 it from the inferior's list, and leave it on GDB's list. */
569 gdb_link = &gdb->next;
573 /* If it's not on the inferior's list, remove it from GDB's tables. */
576 /* Notify any observer that the shared object has been
577 unloaded before we remove it from GDB's tables. */
578 observer_notify_solib_unloaded (gdb);
580 *gdb_link = gdb->next;
582 /* Unless the user loaded it explicitly, free SO's objfile. */
583 if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED))
584 free_objfile (gdb->objfile);
586 /* Some targets' section tables might be referring to
587 sections from so->abfd; remove them. */
588 remove_target_sections (gdb->abfd);
595 /* Now the inferior's list contains only shared objects that don't
596 appear in GDB's list --- those that are newly loaded. Add them
597 to GDB's shared object list. */
602 /* Add the new shared objects to GDB's list. */
603 *gdb_link = inferior;
605 /* Fill in the rest of each of the `struct so_list' nodes. */
606 for (i = inferior; i; i = i->next)
608 i->from_tty = from_tty;
610 /* Fill in the rest of the `struct so_list' node. */
611 catch_errors (solib_map_sections, i,
612 "Error while mapping shared library sections:\n",
615 /* If requested, add the shared object's sections to the TARGET's
616 section table. Do this immediately after mapping the object so
617 that later nodes in the list can query this object, as is needed
621 int count = (i->sections_end - i->sections);
624 int space = target_resize_to_sections (target, count);
625 memcpy (target->to_sections + space,
627 count * sizeof (i->sections[0]));
631 /* Notify any observer that the shared object has been
632 loaded now that we've added it to GDB's tables. */
633 observer_notify_solib_loaded (i);
638 /* Return non-zero if SO is the libpthread shared library.
640 Uses a fairly simplistic heuristic approach where we check
641 the file name against "/libpthread". This can lead to false
642 positives, but this should be good enough in practice. */
645 libpthread_solib_p (struct so_list *so)
647 return (strstr (so->so_name, "/libpthread") != NULL);
652 solib_add -- read in symbol info for newly added shared libraries
656 void solib_add (char *pattern, int from_tty, struct target_ops
657 *TARGET, int readsyms)
661 Read in symbolic information for any shared objects whose names
662 match PATTERN. (If we've already read a shared object's symbol
663 info, leave it alone.) If PATTERN is zero, read them all.
665 If READSYMS is 0, defer reading symbolic information until later
666 but still do any needed low level processing.
668 FROM_TTY and TARGET are as described for update_solib_list, above. */
671 solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms)
677 char *re_err = re_comp (pattern);
680 error (_("Invalid regexp: %s"), re_err);
683 update_solib_list (from_tty, target);
685 /* Walk the list of currently loaded shared libraries, and read
686 symbols for any that match the pattern --- or any whose symbols
687 aren't already loaded, if no pattern was given. */
690 int loaded_any_symbols = 0;
692 for (gdb = so_list_head; gdb; gdb = gdb->next)
693 if (! pattern || re_exec (gdb->so_name))
695 /* Normally, we would read the symbols from that library
696 only if READSYMS is set. However, we're making a small
697 exception for the pthread library, because we sometimes
698 need the library symbols to be loaded in order to provide
699 thread support (x86-linux for instance). */
700 const int add_this_solib =
701 (readsyms || libpthread_solib_p (gdb));
704 if (add_this_solib && solib_read_symbols (gdb, from_tty))
705 loaded_any_symbols = 1;
708 if (from_tty && pattern && ! any_matches)
710 ("No loaded shared libraries match the pattern `%s'.\n", pattern);
712 if (loaded_any_symbols)
714 struct target_so_ops *ops = solib_ops (current_gdbarch);
716 /* Getting new symbols may change our opinion about what is
718 reinit_frame_cache ();
720 ops->special_symbol_handling ();
730 info_sharedlibrary_command -- code for "info sharedlibrary"
734 static void info_sharedlibrary_command ()
738 Walk through the shared library list and print information
739 about each attached library.
743 info_sharedlibrary_command (char *ignore, int from_tty)
745 struct so_list *so = NULL; /* link map state variable */
749 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
750 addr_width = 4 + (gdbarch_ptr_bit (current_gdbarch) / 4);
752 update_solib_list (from_tty, 0);
754 for (so = so_list_head; so; so = so->next)
760 printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From",
761 addr_width, "To", "Syms Read",
762 "Shared Object Library");
766 printf_unfiltered ("%-*s", addr_width,
768 ? hex_string_custom (
769 (LONGEST) so->addr_low,
772 printf_unfiltered ("%-*s", addr_width,
774 ? hex_string_custom (
775 (LONGEST) so->addr_high,
778 printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No");
779 printf_unfiltered ("%s\n", so->so_name);
782 if (so_list_head == NULL)
784 printf_unfiltered (_("No shared libraries loaded at this time.\n"));
792 solib_address -- check to see if an address is in a shared lib
796 char * solib_address (CORE_ADDR address)
800 Provides a hook for other gdb routines to discover whether or
801 not a particular address is within the mapped address space of
804 For example, this routine is called at one point to disable
805 breakpoints which are in shared libraries that are not currently
810 solib_address (CORE_ADDR address)
812 struct so_list *so = 0; /* link map state variable */
814 for (so = so_list_head; so; so = so->next)
816 struct section_table *p;
818 for (p = so->sections; p < so->sections_end; p++)
820 if (p->addr <= address && address < p->endaddr)
821 return (so->so_name);
828 /* Called by free_all_symtabs */
833 struct target_so_ops *ops = solib_ops (current_gdbarch);
835 /* This function is expected to handle ELF shared libraries. It is
836 also used on Solaris, which can run either ELF or a.out binaries
837 (for compatibility with SunOS 4), both of which can use shared
838 libraries. So we don't know whether we have an ELF executable or
839 an a.out executable until the user chooses an executable file.
841 ELF shared libraries don't get mapped into the address space
842 until after the program starts, so we'd better not try to insert
843 breakpoints in them immediately. We have to wait until the
844 dynamic linker has loaded them; we'll hit a bp_shlib_event
845 breakpoint (look for calls to create_solib_event_breakpoint) when
848 SunOS shared libraries seem to be different --- they're present
849 as soon as the process begins execution, so there's no need to
850 put off inserting breakpoints. There's also nowhere to put a
851 bp_shlib_event breakpoint, so if we put it off, we'll never get
854 So: disable breakpoints only if we're using ELF shared libs. */
856 && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour)
857 disable_breakpoints_in_shlibs (1);
861 struct so_list *so = so_list_head;
862 so_list_head = so->next;
864 remove_target_sections (so->abfd);
872 do_clear_solib (void *dummy)
874 solib_cleanup_queued = 0;
880 solib_create_inferior_hook -- shared library startup support
884 void solib_create_inferior_hook ()
888 When gdb starts up the inferior, it nurses it along (through the
889 shell) until it is ready to execute it's first instruction. At this
890 point, this function gets called via expansion of the macro
891 SOLIB_CREATE_INFERIOR_HOOK. */
894 solib_create_inferior_hook (void)
896 struct target_so_ops *ops = solib_ops (current_gdbarch);
897 ops->solib_create_inferior_hook();
902 in_solib_dynsym_resolve_code -- check to see if an address is in
903 dynamic loader's dynamic symbol
908 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
912 Determine if PC is in the dynamic linker's symbol resolution
913 code. Return 1 if so, 0 otherwise.
917 in_solib_dynsym_resolve_code (CORE_ADDR pc)
919 struct target_so_ops *ops = solib_ops (current_gdbarch);
920 return ops->in_dynsym_resolve_code (pc);
927 sharedlibrary_command -- handle command to explicitly add library
931 static void sharedlibrary_command (char *args, int from_tty)
938 sharedlibrary_command (char *args, int from_tty)
941 solib_add (args, from_tty, (struct target_ops *) 0, 1);
946 no_shared_libraries -- handle command to explicitly discard symbols
947 from shared libraries.
951 Implements the command "nosharedlibrary", which discards symbols
952 that have been auto-loaded from shared libraries. Symbols from
953 shared libraries that were added by explicit request of the user
954 are not discarded. Also called from remote.c. */
957 no_shared_libraries (char *ignored, int from_tty)
959 objfile_purge_solibs ();
960 do_clear_solib (NULL);
964 reload_shared_libraries (char *ignored, int from_tty,
965 struct cmd_list_element *e)
967 no_shared_libraries (NULL, from_tty);
968 solib_add (NULL, from_tty, NULL, auto_solib_add);
972 show_auto_solib_add (struct ui_file *file, int from_tty,
973 struct cmd_list_element *c, const char *value)
975 fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"),
980 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
981 the library-specific handler if it is installed for the current target. */
984 solib_global_lookup (const struct objfile *objfile,
986 const char *linkage_name,
987 const domain_enum domain,
988 struct symtab **symtab)
990 if (current_target_so_ops->lookup_lib_global_symbol != NULL)
991 return current_target_so_ops->lookup_lib_global_symbol (objfile,
992 name, linkage_name, domain, symtab);
998 extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */
1001 _initialize_solib (void)
1003 struct cmd_list_element *c;
1005 solib_data = gdbarch_data_register_pre_init (solib_init);
1007 add_com ("sharedlibrary", class_files, sharedlibrary_command,
1008 _("Load shared object library symbols for files matching REGEXP."));
1009 add_info ("sharedlibrary", info_sharedlibrary_command,
1010 _("Status of loaded shared object libraries."));
1011 add_com ("nosharedlibrary", class_files, no_shared_libraries,
1012 _("Unload all shared object library symbols."));
1014 add_setshow_boolean_cmd ("auto-solib-add", class_support,
1015 &auto_solib_add, _("\
1016 Set autoloading of shared library symbols."), _("\
1017 Show autoloading of shared library symbols."), _("\
1018 If \"on\", symbols from all shared object libraries will be loaded\n\
1019 automatically when the inferior begins execution, when the dynamic linker\n\
1020 informs gdb that a new library has been loaded, or when attaching to the\n\
1021 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
1023 show_auto_solib_add,
1024 &setlist, &showlist);
1026 add_setshow_filename_cmd ("sysroot", class_support,
1028 Set an alternate system root."), _("\
1029 Show the current system root."), _("\
1030 The system root is used to load absolute shared library symbol files.\n\
1031 For other (relative) files, you can add directories using\n\
1032 `set solib-search-path'."),
1033 reload_shared_libraries,
1035 &setlist, &showlist);
1037 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
1039 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
1042 add_setshow_optional_filename_cmd ("solib-search-path", class_support,
1043 &solib_search_path, _("\
1044 Set the search path for loading non-absolute shared library symbol files."), _("\
1045 Show the search path for loading non-absolute shared library symbol files."), _("\
1046 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
1047 reload_shared_libraries,
1048 show_solib_search_path,
1049 &setlist, &showlist);