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, 2008
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 3 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, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
26 #include "gdb_string.h"
31 #include "exceptions.h"
36 #include "gdb_regex.h"
41 #include "completer.h"
42 #include "filenames.h" /* for DOSish file names */
46 #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 /* Local function prototypes */
93 /* If non-empty, this is a search path for loading non-absolute shared library
94 symbol files. This takes precedence over the environment variables PATH
95 and LD_LIBRARY_PATH. */
96 static char *solib_search_path = NULL;
98 show_solib_search_path (struct ui_file *file, int from_tty,
99 struct cmd_list_element *c, const char *value)
101 fprintf_filtered (file, _("\
102 The search path for loading non-absolute shared library symbol files is %s.\n"),
110 solib_bfd_open -- Find a shared library file and open BFD for it.
114 struct bfd *solib_open (char *in_pathname);
118 Global variable GDB_SYSROOT is used as a prefix directory
119 to search for shared libraries if they have an absolute path.
121 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
122 (or set of directories, as in LD_LIBRARY_PATH) to search for all
123 shared libraries if not found in GDB_SYSROOT.
126 * If there is a gdb_sysroot and path is absolute:
127 * Search for gdb_sysroot/path.
129 * Look for it literally (unmodified).
130 * Look in SOLIB_SEARCH_PATH.
131 * If available, use target defined search function.
132 * If gdb_sysroot is NOT set, perform the following two searches:
133 * Look in inferior's $PATH.
134 * Look in inferior's $LD_LIBRARY_PATH.
136 * The last check avoids doing this search when targetting remote
137 * machines since gdb_sysroot will almost always be set.
141 BFD file handle for opened solib; throws error on failure. */
144 solib_bfd_open (char *in_pathname)
146 struct target_so_ops *ops = solib_ops (target_gdbarch);
148 char *temp_pathname = NULL;
149 char *p = in_pathname;
150 int gdb_sysroot_is_empty;
153 gdb_sysroot_is_empty = (gdb_sysroot == NULL || *gdb_sysroot == 0);
155 if (! IS_ABSOLUTE_PATH (in_pathname) || gdb_sysroot_is_empty)
156 temp_pathname = in_pathname;
159 int prefix_len = strlen (gdb_sysroot);
161 /* Remove trailing slashes from absolute prefix. */
162 while (prefix_len > 0
163 && IS_DIR_SEPARATOR (gdb_sysroot[prefix_len - 1]))
166 /* Cat the prefixed pathname together. */
167 temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1);
168 strncpy (temp_pathname, gdb_sysroot, prefix_len);
169 temp_pathname[prefix_len] = '\0';
170 strcat (temp_pathname, in_pathname);
173 /* Handle remote files. */
174 if (remote_filename_p (temp_pathname))
176 temp_pathname = xstrdup (temp_pathname);
177 abfd = remote_bfd_open (temp_pathname, gnutarget);
180 make_cleanup (xfree, temp_pathname);
181 error (_("Could not open `%s' as an executable file: %s"),
182 temp_pathname, bfd_errmsg (bfd_get_error ()));
185 if (!bfd_check_format (abfd, bfd_object))
188 make_cleanup (xfree, temp_pathname);
189 error (_("`%s': not in executable format: %s"),
190 temp_pathname, bfd_errmsg (bfd_get_error ()));
196 /* Now see if we can open it. */
197 found_file = open (temp_pathname, O_RDONLY | O_BINARY, 0);
199 /* We try to find the library in various ways. After each attempt
200 (except for the one above), either found_file >= 0 and
201 temp_pathname is a malloc'd string, or found_file < 0 and
202 temp_pathname does not point to storage that needs to be
206 temp_pathname = NULL;
208 temp_pathname = xstrdup (temp_pathname);
210 /* If the search in gdb_sysroot failed, and the path name is
211 absolute at this point, make it relative. (openp will try and open the
212 file according to its absolute path otherwise, which is not what we want.)
213 Affects subsequent searches for this solib. */
214 if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname))
216 /* First, get rid of any drive letters etc. */
217 while (!IS_DIR_SEPARATOR (*in_pathname))
220 /* Next, get rid of all leading dir separators. */
221 while (IS_DIR_SEPARATOR (*in_pathname))
225 /* If not found, search the solib_search_path (if any). */
226 if (found_file < 0 && solib_search_path != NULL)
227 found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
228 in_pathname, O_RDONLY | O_BINARY, 0, &temp_pathname);
230 /* If not found, next search the solib_search_path (if any) for the basename
231 only (ignoring the path). This is to allow reading solibs from a path
232 that differs from the opened path. */
233 if (found_file < 0 && solib_search_path != NULL)
234 found_file = openp (solib_search_path, OPF_TRY_CWD_FIRST,
235 lbasename (in_pathname), O_RDONLY | O_BINARY, 0,
238 /* If not found, try to use target supplied solib search method */
239 if (found_file < 0 && ops->find_and_open_solib)
240 found_file = ops->find_and_open_solib (in_pathname, O_RDONLY | O_BINARY,
243 /* If not found, next search the inferior's $PATH environment variable. */
244 if (found_file < 0 && gdb_sysroot_is_empty)
245 found_file = openp (get_in_environ (inferior_environ, "PATH"),
246 OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
249 /* If not found, next search the inferior's $LD_LIBRARY_PATH
250 environment variable. */
251 if (found_file < 0 && gdb_sysroot_is_empty)
252 found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"),
253 OPF_TRY_CWD_FIRST, in_pathname, O_RDONLY | O_BINARY, 0,
256 /* Done. If still not found, error. */
258 perror_with_name (in_pathname);
260 /* Leave temp_pathname allocated. abfd->name will point to it. */
261 abfd = bfd_fopen (temp_pathname, gnutarget, FOPEN_RB, found_file);
265 make_cleanup (xfree, temp_pathname);
266 error (_("Could not open `%s' as an executable file: %s"),
267 temp_pathname, bfd_errmsg (bfd_get_error ()));
270 if (!bfd_check_format (abfd, bfd_object))
273 make_cleanup (xfree, temp_pathname);
274 error (_("`%s': not in executable format: %s"),
275 temp_pathname, bfd_errmsg (bfd_get_error ()));
278 bfd_set_cacheable (abfd, 1);
287 solib_map_sections -- open bfd and build sections for shared lib
291 static int solib_map_sections (struct so_list *so)
295 Given a pointer to one of the shared objects in our list
296 of mapped objects, use the recorded name to open a bfd
297 descriptor for the object, build a section table, and then
298 relocate all the section addresses by the base address at
299 which the shared object was mapped.
303 In most (all?) cases the shared object file name recorded in the
304 dynamic linkage tables will be a fully qualified pathname. For
305 cases where it isn't, do we really mimic the systems search
306 mechanism correctly in the below code (particularly the tilde
311 solib_map_sections (void *arg)
313 struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */
315 struct section_table *p;
316 struct cleanup *old_chain;
319 filename = tilde_expand (so->so_name);
320 old_chain = make_cleanup (xfree, filename);
321 abfd = solib_bfd_open (filename);
322 do_cleanups (old_chain);
324 /* Leave bfd open, core_xfer_memory and "info files" need it. */
327 /* copy full path name into so_name, so that later symbol_file_add
329 if (strlen (bfd_get_filename (abfd)) >= SO_NAME_MAX_PATH_SIZE)
330 error (_("Shared library file name is too long."));
331 strcpy (so->so_name, bfd_get_filename (abfd));
333 if (build_section_table (abfd, &so->sections, &so->sections_end))
335 error (_("Can't find the file sections in `%s': %s"),
336 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
339 for (p = so->sections; p < so->sections_end; p++)
341 struct target_so_ops *ops = solib_ops (target_gdbarch);
343 /* Relocate the section binding addresses as recorded in the shared
344 object's file by the base address to which the object was actually
346 ops->relocate_section_addresses (so, p);
348 /* If the target didn't provide information about the address
349 range of the shared object, assume we want the location of
350 the .text section. */
351 if (so->addr_low == 0 && so->addr_high == 0
352 && strcmp (p->the_bfd_section->name, ".text") == 0)
354 so->addr_low = p->addr;
355 so->addr_high = p->endaddr;
364 free_so --- free a `struct so_list' object
368 void free_so (struct so_list *so)
372 Free the storage associated with the `struct so_list' object SO.
373 If we have opened a BFD for SO, close it.
375 The caller is responsible for removing SO from whatever list it is
376 a member of. If we have placed SO's sections in some target's
377 section table, the caller is responsible for removing them.
379 This function doesn't mess with objfiles at all. If there is an
380 objfile associated with SO that needs to be removed, the caller is
381 responsible for taking care of that. */
384 free_so (struct so_list *so)
386 struct target_so_ops *ops = solib_ops (target_gdbarch);
387 char *bfd_filename = 0;
390 xfree (so->sections);
394 bfd_filename = bfd_get_filename (so->abfd);
395 if (! bfd_close (so->abfd))
396 warning (_("cannot close \"%s\": %s"),
397 bfd_filename, bfd_errmsg (bfd_get_error ()));
401 xfree (bfd_filename);
409 /* Return address of first so_list entry in master shared object list. */
411 master_so_list (void)
417 /* A small stub to get us past the arg-passing pinhole of catch_errors. */
420 symbol_add_stub (void *arg)
422 struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
423 struct section_addr_info *sap;
425 /* Have we already loaded this shared object? */
426 ALL_OBJFILES (so->objfile)
428 if (strcmp (so->objfile->name, so->so_name) == 0)
432 sap = build_section_addr_info_from_section_table (so->sections,
435 so->objfile = symbol_file_add (so->so_name, so->from_tty,
436 sap, 0, OBJF_SHARED);
437 free_section_addr_info (sap);
442 /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be
443 chatty about it. Return non-zero if any symbols were actually
447 solib_read_symbols (struct so_list *so, int from_tty)
449 if (so->symbols_loaded)
452 printf_unfiltered (_("Symbols already loaded for %s\n"), so->so_name);
454 else if (so->abfd == NULL)
457 printf_unfiltered (_("Symbol file not found for %s\n"), so->so_name);
461 if (catch_errors (symbol_add_stub, so,
462 "Error while reading shared library symbols:\n",
465 if (from_tty && print_symbol_loading)
466 printf_unfiltered (_("Loaded symbols for %s\n"), so->so_name);
467 so->symbols_loaded = 1;
477 update_solib_list --- synchronize GDB's shared object list with inferior's
481 void update_solib_list (int from_tty, struct target_ops *TARGET)
483 Extract the list of currently loaded shared objects from the
484 inferior, and compare it with the list of shared objects currently
485 in GDB's so_list_head list. Edit so_list_head to bring it in sync
486 with the inferior's new list.
488 If we notice that the inferior has unloaded some shared objects,
489 free any symbolic info GDB had read about those shared objects.
491 Don't load symbolic info for any new shared objects; just add them
492 to the list, and leave their symbols_loaded flag clear.
494 If FROM_TTY is non-null, feel free to print messages about what
497 If TARGET is non-null, add the sections of all new shared objects
498 to TARGET's section table. Note that this doesn't remove any
499 sections for shared objects that have been unloaded, and it
500 doesn't check to see if the new shared objects are already present in
501 the section table. But we only use this for core files and
502 processes we've just attached to, so that's okay. */
505 update_solib_list (int from_tty, struct target_ops *target)
507 struct target_so_ops *ops = solib_ops (target_gdbarch);
508 struct so_list *inferior = ops->current_sos();
509 struct so_list *gdb, **gdb_link;
511 /* We can reach here due to changing solib-search-path or the
512 sysroot, before having any inferior. */
513 if (target_has_execution && !ptid_equal (inferior_ptid, null_ptid))
515 struct inferior *inf = current_inferior ();
517 /* If we are attaching to a running process for which we
518 have not opened a symbol file, we may be able to get its
520 if (inf->attach_flag && symfile_objfile == NULL)
521 catch_errors (ops->open_symbol_file_object, &from_tty,
522 "Error reading attached process's symbol file.\n",
526 /* GDB and the inferior's dynamic linker each maintain their own
527 list of currently loaded shared objects; we want to bring the
528 former in sync with the latter. Scan both lists, seeing which
529 shared objects appear where. There are three cases:
531 - A shared object appears on both lists. This means that GDB
532 knows about it already, and it's still loaded in the inferior.
533 Nothing needs to happen.
535 - A shared object appears only on GDB's list. This means that
536 the inferior has unloaded it. We should remove the shared
537 object from GDB's tables.
539 - A shared object appears only on the inferior's list. This
540 means that it's just been loaded. We should add it to GDB's
543 So we walk GDB's list, checking each entry to see if it appears
544 in the inferior's list too. If it does, no action is needed, and
545 we remove it from the inferior's list. If it doesn't, the
546 inferior has unloaded it, and we remove it from GDB's list. By
547 the time we're done walking GDB's list, the inferior's list
548 contains only the new shared objects, which we then add. */
551 gdb_link = &so_list_head;
554 struct so_list *i = inferior;
555 struct so_list **i_link = &inferior;
557 /* Check to see whether the shared object *gdb also appears in
558 the inferior's current list. */
563 if (ops->same (gdb, i))
568 if (! strcmp (gdb->so_original_name, i->so_original_name))
576 /* If the shared object appears on the inferior's list too, then
577 it's still loaded, so we don't need to do anything. Delete
578 it from the inferior's list, and leave it on GDB's list. */
583 gdb_link = &gdb->next;
587 /* If it's not on the inferior's list, remove it from GDB's tables. */
590 /* Notify any observer that the shared object has been
591 unloaded before we remove it from GDB's tables. */
592 observer_notify_solib_unloaded (gdb);
594 *gdb_link = gdb->next;
596 /* Unless the user loaded it explicitly, free SO's objfile. */
597 if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED))
598 free_objfile (gdb->objfile);
600 /* Some targets' section tables might be referring to
601 sections from so->abfd; remove them. */
602 remove_target_sections (gdb->abfd);
609 /* Now the inferior's list contains only shared objects that don't
610 appear in GDB's list --- those that are newly loaded. Add them
611 to GDB's shared object list. */
616 /* Add the new shared objects to GDB's list. */
617 *gdb_link = inferior;
619 /* Fill in the rest of each of the `struct so_list' nodes. */
620 for (i = inferior; i; i = i->next)
622 i->from_tty = from_tty;
624 /* Fill in the rest of the `struct so_list' node. */
625 catch_errors (solib_map_sections, i,
626 "Error while mapping shared library sections:\n",
629 /* If requested, add the shared object's sections to the TARGET's
630 section table. Do this immediately after mapping the object so
631 that later nodes in the list can query this object, as is needed
635 int count = (i->sections_end - i->sections);
638 int space = target_resize_to_sections (target, count);
639 memcpy (target->to_sections + space,
641 count * sizeof (i->sections[0]));
645 /* Notify any observer that the shared object has been
646 loaded now that we've added it to GDB's tables. */
647 observer_notify_solib_loaded (i);
652 /* Return non-zero if SO is the libpthread shared library.
654 Uses a fairly simplistic heuristic approach where we check
655 the file name against "/libpthread". This can lead to false
656 positives, but this should be good enough in practice. */
659 libpthread_solib_p (struct so_list *so)
661 return (strstr (so->so_name, "/libpthread") != NULL);
666 solib_add -- read in symbol info for newly added shared libraries
670 void solib_add (char *pattern, int from_tty, struct target_ops
671 *TARGET, int readsyms)
675 Read in symbolic information for any shared objects whose names
676 match PATTERN. (If we've already read a shared object's symbol
677 info, leave it alone.) If PATTERN is zero, read them all.
679 If READSYMS is 0, defer reading symbolic information until later
680 but still do any needed low level processing.
682 FROM_TTY and TARGET are as described for update_solib_list, above. */
685 solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms)
691 char *re_err = re_comp (pattern);
694 error (_("Invalid regexp: %s"), re_err);
697 update_solib_list (from_tty, target);
699 /* Walk the list of currently loaded shared libraries, and read
700 symbols for any that match the pattern --- or any whose symbols
701 aren't already loaded, if no pattern was given. */
704 int loaded_any_symbols = 0;
706 for (gdb = so_list_head; gdb; gdb = gdb->next)
707 if (! pattern || re_exec (gdb->so_name))
709 /* Normally, we would read the symbols from that library
710 only if READSYMS is set. However, we're making a small
711 exception for the pthread library, because we sometimes
712 need the library symbols to be loaded in order to provide
713 thread support (x86-linux for instance). */
714 const int add_this_solib =
715 (readsyms || libpthread_solib_p (gdb));
718 if (add_this_solib && solib_read_symbols (gdb, from_tty))
719 loaded_any_symbols = 1;
722 if (from_tty && pattern && ! any_matches)
724 ("No loaded shared libraries match the pattern `%s'.\n", pattern);
726 if (loaded_any_symbols)
728 struct target_so_ops *ops = solib_ops (target_gdbarch);
730 /* Getting new symbols may change our opinion about what is
732 reinit_frame_cache ();
734 ops->special_symbol_handling ();
744 info_sharedlibrary_command -- code for "info sharedlibrary"
748 static void info_sharedlibrary_command ()
752 Walk through the shared library list and print information
753 about each attached library.
757 info_sharedlibrary_command (char *ignore, int from_tty)
759 struct so_list *so = NULL; /* link map state variable */
763 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
764 addr_width = 4 + (gdbarch_ptr_bit (target_gdbarch) / 4);
766 update_solib_list (from_tty, 0);
768 for (so = so_list_head; so; so = so->next)
774 printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From",
775 addr_width, "To", "Syms Read",
776 "Shared Object Library");
780 printf_unfiltered ("%-*s", addr_width,
782 ? hex_string_custom (
783 (LONGEST) so->addr_low,
786 printf_unfiltered ("%-*s", addr_width,
788 ? hex_string_custom (
789 (LONGEST) so->addr_high,
792 printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No");
793 printf_unfiltered ("%s\n", so->so_name);
796 if (so_list_head == NULL)
798 printf_unfiltered (_("No shared libraries loaded at this time.\n"));
806 solib_address -- check to see if an address is in a shared lib
810 char * solib_address (CORE_ADDR address)
814 Provides a hook for other gdb routines to discover whether or
815 not a particular address is within the mapped address space of
818 For example, this routine is called at one point to disable
819 breakpoints which are in shared libraries that are not currently
824 solib_address (CORE_ADDR address)
826 struct so_list *so = 0; /* link map state variable */
828 for (so = so_list_head; so; so = so->next)
830 struct section_table *p;
832 for (p = so->sections; p < so->sections_end; p++)
834 if (p->addr <= address && address < p->endaddr)
835 return (so->so_name);
842 /* Called by free_all_symtabs */
847 struct target_so_ops *ops = solib_ops (target_gdbarch);
849 /* This function is expected to handle ELF shared libraries. It is
850 also used on Solaris, which can run either ELF or a.out binaries
851 (for compatibility with SunOS 4), both of which can use shared
852 libraries. So we don't know whether we have an ELF executable or
853 an a.out executable until the user chooses an executable file.
855 ELF shared libraries don't get mapped into the address space
856 until after the program starts, so we'd better not try to insert
857 breakpoints in them immediately. We have to wait until the
858 dynamic linker has loaded them; we'll hit a bp_shlib_event
859 breakpoint (look for calls to create_solib_event_breakpoint) when
862 SunOS shared libraries seem to be different --- they're present
863 as soon as the process begins execution, so there's no need to
864 put off inserting breakpoints. There's also nowhere to put a
865 bp_shlib_event breakpoint, so if we put it off, we'll never get
868 So: disable breakpoints only if we're using ELF shared libs. */
870 && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour)
871 disable_breakpoints_in_shlibs ();
875 struct so_list *so = so_list_head;
876 so_list_head = so->next;
878 remove_target_sections (so->abfd);
887 solib_create_inferior_hook -- shared library startup support
891 void solib_create_inferior_hook ()
895 When gdb starts up the inferior, it nurses it along (through the
896 shell) until it is ready to execute it's first instruction. At this
897 point, this function gets called via expansion of the macro
898 SOLIB_CREATE_INFERIOR_HOOK. */
901 solib_create_inferior_hook (void)
903 struct target_so_ops *ops = solib_ops (target_gdbarch);
904 ops->solib_create_inferior_hook();
909 in_solib_dynsym_resolve_code -- check to see if an address is in
910 dynamic loader's dynamic symbol
915 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
919 Determine if PC is in the dynamic linker's symbol resolution
920 code. Return 1 if so, 0 otherwise.
924 in_solib_dynsym_resolve_code (CORE_ADDR pc)
926 struct target_so_ops *ops = solib_ops (target_gdbarch);
927 return ops->in_dynsym_resolve_code (pc);
934 sharedlibrary_command -- handle command to explicitly add library
938 static void sharedlibrary_command (char *args, int from_tty)
945 sharedlibrary_command (char *args, int from_tty)
948 solib_add (args, from_tty, (struct target_ops *) 0, 1);
953 no_shared_libraries -- handle command to explicitly discard symbols
954 from shared libraries.
958 Implements the command "nosharedlibrary", which discards symbols
959 that have been auto-loaded from shared libraries. Symbols from
960 shared libraries that were added by explicit request of the user
961 are not discarded. Also called from remote.c. */
964 no_shared_libraries (char *ignored, int from_tty)
966 objfile_purge_solibs ();
971 reload_shared_libraries (char *ignored, int from_tty,
972 struct cmd_list_element *e)
974 no_shared_libraries (NULL, from_tty);
975 solib_add (NULL, from_tty, NULL, auto_solib_add);
979 show_auto_solib_add (struct ui_file *file, int from_tty,
980 struct cmd_list_element *c, const char *value)
982 fprintf_filtered (file, _("Autoloading of shared library symbols is %s.\n"),
987 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
988 the library-specific handler if it is installed for the current target. */
991 solib_global_lookup (const struct objfile *objfile,
993 const char *linkage_name,
994 const domain_enum domain)
996 struct target_so_ops *ops = solib_ops (target_gdbarch);
998 if (ops->lookup_lib_global_symbol != NULL)
999 return ops->lookup_lib_global_symbol (objfile, name, linkage_name, domain);
1004 extern initialize_file_ftype _initialize_solib; /* -Wmissing-prototypes */
1007 _initialize_solib (void)
1009 struct cmd_list_element *c;
1011 solib_data = gdbarch_data_register_pre_init (solib_init);
1013 add_com ("sharedlibrary", class_files, sharedlibrary_command,
1014 _("Load shared object library symbols for files matching REGEXP."));
1015 add_info ("sharedlibrary", info_sharedlibrary_command,
1016 _("Status of loaded shared object libraries."));
1017 add_com ("nosharedlibrary", class_files, no_shared_libraries,
1018 _("Unload all shared object library symbols."));
1020 add_setshow_boolean_cmd ("auto-solib-add", class_support,
1021 &auto_solib_add, _("\
1022 Set autoloading of shared library symbols."), _("\
1023 Show autoloading of shared library symbols."), _("\
1024 If \"on\", symbols from all shared object libraries will be loaded\n\
1025 automatically when the inferior begins execution, when the dynamic linker\n\
1026 informs gdb that a new library has been loaded, or when attaching to the\n\
1027 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
1029 show_auto_solib_add,
1030 &setlist, &showlist);
1032 add_setshow_filename_cmd ("sysroot", class_support,
1034 Set an alternate system root."), _("\
1035 Show the current system root."), _("\
1036 The system root is used to load absolute shared library symbol files.\n\
1037 For other (relative) files, you can add directories using\n\
1038 `set solib-search-path'."),
1039 reload_shared_libraries,
1041 &setlist, &showlist);
1043 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
1045 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
1048 add_setshow_optional_filename_cmd ("solib-search-path", class_support,
1049 &solib_search_path, _("\
1050 Set the search path for loading non-absolute shared library symbol files."), _("\
1051 Show the search path for loading non-absolute shared library symbol files."), _("\
1052 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
1053 reload_shared_libraries,
1054 show_solib_search_path,
1055 &setlist, &showlist);