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 /* If the search in gdb_sysroot failed, and the path name is
180 absolute at this point, make it relative. (openp will try and open the
181 file according to its absolute path otherwise, which is not what we want.)
182 Affects subsequent searches for this solib. */
183 if (found_file
< 0 && IS_ABSOLUTE_PATH (in_pathname
))
185 /* First, get rid of any drive letters etc. */
186 while (!IS_DIR_SEPARATOR (*in_pathname
))
189 /* Next, get rid of all leading dir separators. */
190 while (IS_DIR_SEPARATOR (*in_pathname
))
194 /* If not found, search the solib_search_path (if any). */
195 if (found_file
< 0 && solib_search_path
!= NULL
)
196 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
197 in_pathname
, O_RDONLY
| O_BINARY
, 0, &temp_pathname
);
199 /* If not found, next search the solib_search_path (if any) for the basename
200 only (ignoring the path). This is to allow reading solibs from a path
201 that differs from the opened path. */
202 if (found_file
< 0 && solib_search_path
!= NULL
)
203 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
204 lbasename (in_pathname
), O_RDONLY
| O_BINARY
, 0,
207 /* If not found, try to use target supplied solib search method */
208 if (found_file
< 0 && ops
->find_and_open_solib
)
209 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
212 /* If not found, next search the inferior's $PATH environment variable. */
213 if (found_file
< 0 && gdb_sysroot_is_empty
)
214 found_file
= openp (get_in_environ (inferior_environ
, "PATH"),
215 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
, 0,
218 /* If not found, next search the inferior's $LD_LIBRARY_PATH
219 environment variable. */
220 if (found_file
< 0 && gdb_sysroot_is_empty
)
221 found_file
= openp (get_in_environ (inferior_environ
, "LD_LIBRARY_PATH"),
222 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
, 0,
225 /* Done. If not found, tough luck. Return found_file and
226 (optionally) found_pathname. */
227 if (found_pathname
!= NULL
&& temp_pathname
!= NULL
)
228 *found_pathname
= xstrdup (temp_pathname
);
237 solib_map_sections -- open bfd and build sections for shared lib
241 static int solib_map_sections (struct so_list *so)
245 Given a pointer to one of the shared objects in our list
246 of mapped objects, use the recorded name to open a bfd
247 descriptor for the object, build a section table, and then
248 relocate all the section addresses by the base address at
249 which the shared object was mapped.
253 In most (all?) cases the shared object file name recorded in the
254 dynamic linkage tables will be a fully qualified pathname. For
255 cases where it isn't, do we really mimic the systems search
256 mechanism correctly in the below code (particularly the tilde
261 solib_map_sections (void *arg
)
263 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errors bogon */
265 char *scratch_pathname
;
267 struct section_table
*p
;
268 struct cleanup
*old_chain
;
271 filename
= tilde_expand (so
->so_name
);
273 old_chain
= make_cleanup (xfree
, filename
);
274 scratch_chan
= solib_open (filename
, &scratch_pathname
);
276 if (scratch_chan
< 0)
278 perror_with_name (filename
);
281 /* Leave scratch_pathname allocated. abfd->name will point to it. */
282 abfd
= bfd_fopen (scratch_pathname
, gnutarget
, FOPEN_RB
, scratch_chan
);
285 close (scratch_chan
);
286 error (_("Could not open `%s' as an executable file: %s"),
287 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
290 /* Leave bfd open, core_xfer_memory and "info files" need it. */
292 bfd_set_cacheable (abfd
, 1);
294 /* copy full path name into so_name, so that later symbol_file_add
296 if (strlen (scratch_pathname
) >= SO_NAME_MAX_PATH_SIZE
)
297 error (_("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure."));
298 strcpy (so
->so_name
, scratch_pathname
);
300 if (!bfd_check_format (abfd
, bfd_object
))
302 error (_("\"%s\": not in executable format: %s."),
303 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
305 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
307 error (_("Can't find the file sections in `%s': %s"),
308 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
311 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
313 struct target_so_ops
*ops
= solib_ops (current_gdbarch
);
315 /* Relocate the section binding addresses as recorded in the shared
316 object's file by the base address to which the object was actually
318 ops
->relocate_section_addresses (so
, p
);
320 /* If the target didn't provide information about the address
321 range of the shared object, assume we want the location of
322 the .text section. */
323 if (so
->addr_low
== 0 && so
->addr_high
== 0
324 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
326 so
->addr_low
= p
->addr
;
327 so
->addr_high
= p
->endaddr
;
331 /* Free the file names, close the file now. */
332 do_cleanups (old_chain
);
339 free_so --- free a `struct so_list' object
343 void free_so (struct so_list *so)
347 Free the storage associated with the `struct so_list' object SO.
348 If we have opened a BFD for SO, close it.
350 The caller is responsible for removing SO from whatever list it is
351 a member of. If we have placed SO's sections in some target's
352 section table, the caller is responsible for removing them.
354 This function doesn't mess with objfiles at all. If there is an
355 objfile associated with SO that needs to be removed, the caller is
356 responsible for taking care of that. */
359 free_so (struct so_list
*so
)
361 struct target_so_ops
*ops
= solib_ops (current_gdbarch
);
362 char *bfd_filename
= 0;
365 xfree (so
->sections
);
369 bfd_filename
= bfd_get_filename (so
->abfd
);
370 if (! bfd_close (so
->abfd
))
371 warning (_("cannot close \"%s\": %s"),
372 bfd_filename
, bfd_errmsg (bfd_get_error ()));
376 xfree (bfd_filename
);
384 /* Return address of first so_list entry in master shared object list. */
386 master_so_list (void)
392 /* A small stub to get us past the arg-passing pinhole of catch_errors. */
395 symbol_add_stub (void *arg
)
397 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errs bogon */
398 struct section_addr_info
*sap
;
400 /* Have we already loaded this shared object? */
401 ALL_OBJFILES (so
->objfile
)
403 if (strcmp (so
->objfile
->name
, so
->so_name
) == 0)
407 sap
= build_section_addr_info_from_section_table (so
->sections
,
410 so
->objfile
= symbol_file_add (so
->so_name
, so
->from_tty
,
411 sap
, 0, OBJF_SHARED
);
412 free_section_addr_info (sap
);
417 /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be
418 chatty about it. Return non-zero if any symbols were actually
422 solib_read_symbols (struct so_list
*so
, int from_tty
)
424 if (so
->symbols_loaded
)
427 printf_unfiltered (_("Symbols already loaded for %s\n"), so
->so_name
);
429 else if (so
->abfd
== NULL
)
432 printf_unfiltered (_("Symbol file not found for %s\n"), so
->so_name
);
436 if (catch_errors (symbol_add_stub
, so
,
437 "Error while reading shared library symbols:\n",
441 printf_unfiltered (_("Loaded symbols for %s\n"), so
->so_name
);
442 so
->symbols_loaded
= 1;
452 update_solib_list --- synchronize GDB's shared object list with inferior's
456 void update_solib_list (int from_tty, struct target_ops *TARGET)
458 Extract the list of currently loaded shared objects from the
459 inferior, and compare it with the list of shared objects currently
460 in GDB's so_list_head list. Edit so_list_head to bring it in sync
461 with the inferior's new list.
463 If we notice that the inferior has unloaded some shared objects,
464 free any symbolic info GDB had read about those shared objects.
466 Don't load symbolic info for any new shared objects; just add them
467 to the list, and leave their symbols_loaded flag clear.
469 If FROM_TTY is non-null, feel free to print messages about what
472 If TARGET is non-null, add the sections of all new shared objects
473 to TARGET's section table. Note that this doesn't remove any
474 sections for shared objects that have been unloaded, and it
475 doesn't check to see if the new shared objects are already present in
476 the section table. But we only use this for core files and
477 processes we've just attached to, so that's okay. */
480 update_solib_list (int from_tty
, struct target_ops
*target
)
482 struct target_so_ops
*ops
= solib_ops (current_gdbarch
);
483 struct so_list
*inferior
= ops
->current_sos();
484 struct so_list
*gdb
, **gdb_link
;
486 /* If we are attaching to a running process for which we
487 have not opened a symbol file, we may be able to get its
490 symfile_objfile
== NULL
)
491 catch_errors (ops
->open_symbol_file_object
, &from_tty
,
492 "Error reading attached process's symbol file.\n",
495 /* Since this function might actually add some elements to the
496 so_list_head list, arrange for it to be cleaned up when
498 if (!solib_cleanup_queued
)
500 make_run_cleanup (do_clear_solib
, NULL
);
501 solib_cleanup_queued
= 1;
504 /* GDB and the inferior's dynamic linker each maintain their own
505 list of currently loaded shared objects; we want to bring the
506 former in sync with the latter. Scan both lists, seeing which
507 shared objects appear where. There are three cases:
509 - A shared object appears on both lists. This means that GDB
510 knows about it already, and it's still loaded in the inferior.
511 Nothing needs to happen.
513 - A shared object appears only on GDB's list. This means that
514 the inferior has unloaded it. We should remove the shared
515 object from GDB's tables.
517 - A shared object appears only on the inferior's list. This
518 means that it's just been loaded. We should add it to GDB's
521 So we walk GDB's list, checking each entry to see if it appears
522 in the inferior's list too. If it does, no action is needed, and
523 we remove it from the inferior's list. If it doesn't, the
524 inferior has unloaded it, and we remove it from GDB's list. By
525 the time we're done walking GDB's list, the inferior's list
526 contains only the new shared objects, which we then add. */
529 gdb_link
= &so_list_head
;
532 struct so_list
*i
= inferior
;
533 struct so_list
**i_link
= &inferior
;
535 /* Check to see whether the shared object *gdb also appears in
536 the inferior's current list. */
539 if (! strcmp (gdb
->so_original_name
, i
->so_original_name
))
546 /* If the shared object appears on the inferior's list too, then
547 it's still loaded, so we don't need to do anything. Delete
548 it from the inferior's list, and leave it on GDB's list. */
553 gdb_link
= &gdb
->next
;
557 /* If it's not on the inferior's list, remove it from GDB's tables. */
560 /* Notify any observer that the shared object has been
561 unloaded before we remove it from GDB's tables. */
562 observer_notify_solib_unloaded (gdb
);
564 *gdb_link
= gdb
->next
;
566 /* Unless the user loaded it explicitly, free SO's objfile. */
567 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
))
568 free_objfile (gdb
->objfile
);
570 /* Some targets' section tables might be referring to
571 sections from so->abfd; remove them. */
572 remove_target_sections (gdb
->abfd
);
579 /* Now the inferior's list contains only shared objects that don't
580 appear in GDB's list --- those that are newly loaded. Add them
581 to GDB's shared object list. */
586 /* Add the new shared objects to GDB's list. */
587 *gdb_link
= inferior
;
589 /* Fill in the rest of each of the `struct so_list' nodes. */
590 for (i
= inferior
; i
; i
= i
->next
)
592 i
->from_tty
= from_tty
;
594 /* Fill in the rest of the `struct so_list' node. */
595 catch_errors (solib_map_sections
, i
,
596 "Error while mapping shared library sections:\n",
599 /* If requested, add the shared object's sections to the TARGET's
600 section table. Do this immediately after mapping the object so
601 that later nodes in the list can query this object, as is needed
605 int count
= (i
->sections_end
- i
->sections
);
608 int space
= target_resize_to_sections (target
, count
);
609 memcpy (target
->to_sections
+ space
,
611 count
* sizeof (i
->sections
[0]));
615 /* Notify any observer that the shared object has been
616 loaded now that we've added it to GDB's tables. */
617 observer_notify_solib_loaded (i
);
622 /* Return non-zero if SO is the libpthread shared library.
624 Uses a fairly simplistic heuristic approach where we check
625 the file name against "/libpthread". This can lead to false
626 positives, but this should be good enough in practice. */
629 libpthread_solib_p (struct so_list
*so
)
631 return (strstr (so
->so_name
, "/libpthread") != NULL
);
636 solib_add -- read in symbol info for newly added shared libraries
640 void solib_add (char *pattern, int from_tty, struct target_ops
641 *TARGET, int readsyms)
645 Read in symbolic information for any shared objects whose names
646 match PATTERN. (If we've already read a shared object's symbol
647 info, leave it alone.) If PATTERN is zero, read them all.
649 If READSYMS is 0, defer reading symbolic information until later
650 but still do any needed low level processing.
652 FROM_TTY and TARGET are as described for update_solib_list, above. */
655 solib_add (char *pattern
, int from_tty
, struct target_ops
*target
, int readsyms
)
661 char *re_err
= re_comp (pattern
);
664 error (_("Invalid regexp: %s"), re_err
);
667 update_solib_list (from_tty
, target
);
669 /* Walk the list of currently loaded shared libraries, and read
670 symbols for any that match the pattern --- or any whose symbols
671 aren't already loaded, if no pattern was given. */
674 int loaded_any_symbols
= 0;
676 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
677 if (! pattern
|| re_exec (gdb
->so_name
))
679 /* Normally, we would read the symbols from that library
680 only if READSYMS is set. However, we're making a small
681 exception for the pthread library, because we sometimes
682 need the library symbols to be loaded in order to provide
683 thread support (x86-linux for instance). */
684 const int add_this_solib
=
685 (readsyms
|| libpthread_solib_p (gdb
));
688 if (add_this_solib
&& solib_read_symbols (gdb
, from_tty
))
689 loaded_any_symbols
= 1;
692 if (from_tty
&& pattern
&& ! any_matches
)
694 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
696 if (loaded_any_symbols
)
698 struct target_so_ops
*ops
= solib_ops (current_gdbarch
);
700 /* Getting new symbols may change our opinion about what is
702 reinit_frame_cache ();
704 ops
->special_symbol_handling ();
714 info_sharedlibrary_command -- code for "info sharedlibrary"
718 static void info_sharedlibrary_command ()
722 Walk through the shared library list and print information
723 about each attached library.
727 info_sharedlibrary_command (char *ignore
, int from_tty
)
729 struct so_list
*so
= NULL
; /* link map state variable */
733 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
734 addr_width
= 4 + (gdbarch_ptr_bit (current_gdbarch
) / 4);
736 update_solib_list (from_tty
, 0);
738 for (so
= so_list_head
; so
; so
= so
->next
)
744 printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width
, "From",
745 addr_width
, "To", "Syms Read",
746 "Shared Object Library");
750 printf_unfiltered ("%-*s", addr_width
,
752 ? hex_string_custom (
753 (LONGEST
) so
->addr_low
,
756 printf_unfiltered ("%-*s", addr_width
,
758 ? hex_string_custom (
759 (LONGEST
) so
->addr_high
,
762 printf_unfiltered ("%-12s", so
->symbols_loaded
? "Yes" : "No");
763 printf_unfiltered ("%s\n", so
->so_name
);
766 if (so_list_head
== NULL
)
768 printf_unfiltered (_("No shared libraries loaded at this time.\n"));
776 solib_address -- check to see if an address is in a shared lib
780 char * solib_address (CORE_ADDR address)
784 Provides a hook for other gdb routines to discover whether or
785 not a particular address is within the mapped address space of
788 For example, this routine is called at one point to disable
789 breakpoints which are in shared libraries that are not currently
794 solib_address (CORE_ADDR address
)
796 struct so_list
*so
= 0; /* link map state variable */
798 for (so
= so_list_head
; so
; so
= so
->next
)
800 struct section_table
*p
;
802 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
804 if (p
->addr
<= address
&& address
< p
->endaddr
)
805 return (so
->so_name
);
812 /* Called by free_all_symtabs */
817 struct target_so_ops
*ops
= solib_ops (current_gdbarch
);
819 /* This function is expected to handle ELF shared libraries. It is
820 also used on Solaris, which can run either ELF or a.out binaries
821 (for compatibility with SunOS 4), both of which can use shared
822 libraries. So we don't know whether we have an ELF executable or
823 an a.out executable until the user chooses an executable file.
825 ELF shared libraries don't get mapped into the address space
826 until after the program starts, so we'd better not try to insert
827 breakpoints in them immediately. We have to wait until the
828 dynamic linker has loaded them; we'll hit a bp_shlib_event
829 breakpoint (look for calls to create_solib_event_breakpoint) when
832 SunOS shared libraries seem to be different --- they're present
833 as soon as the process begins execution, so there's no need to
834 put off inserting breakpoints. There's also nowhere to put a
835 bp_shlib_event breakpoint, so if we put it off, we'll never get
838 So: disable breakpoints only if we're using ELF shared libs. */
840 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
841 disable_breakpoints_in_shlibs (1);
845 struct so_list
*so
= so_list_head
;
846 so_list_head
= so
->next
;
848 remove_target_sections (so
->abfd
);
856 do_clear_solib (void *dummy
)
858 solib_cleanup_queued
= 0;
864 solib_create_inferior_hook -- shared library startup support
868 void solib_create_inferior_hook ()
872 When gdb starts up the inferior, it nurses it along (through the
873 shell) until it is ready to execute it's first instruction. At this
874 point, this function gets called via expansion of the macro
875 SOLIB_CREATE_INFERIOR_HOOK. */
878 solib_create_inferior_hook (void)
880 struct target_so_ops
*ops
= solib_ops (current_gdbarch
);
881 ops
->solib_create_inferior_hook();
886 in_solib_dynsym_resolve_code -- check to see if an address is in
887 dynamic loader's dynamic symbol
892 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
896 Determine if PC is in the dynamic linker's symbol resolution
897 code. Return 1 if so, 0 otherwise.
901 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
903 struct target_so_ops
*ops
= solib_ops (current_gdbarch
);
904 return ops
->in_dynsym_resolve_code (pc
);
911 sharedlibrary_command -- handle command to explicitly add library
915 static void sharedlibrary_command (char *args, int from_tty)
922 sharedlibrary_command (char *args
, int from_tty
)
925 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
930 no_shared_libraries -- handle command to explicitly discard symbols
931 from shared libraries.
935 Implements the command "nosharedlibrary", which discards symbols
936 that have been auto-loaded from shared libraries. Symbols from
937 shared libraries that were added by explicit request of the user
938 are not discarded. Also called from remote.c. */
941 no_shared_libraries (char *ignored
, int from_tty
)
943 objfile_purge_solibs ();
944 do_clear_solib (NULL
);
948 reload_shared_libraries (char *ignored
, int from_tty
,
949 struct cmd_list_element
*e
)
951 no_shared_libraries (NULL
, from_tty
);
952 solib_add (NULL
, from_tty
, NULL
, auto_solib_add
);
956 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
957 struct cmd_list_element
*c
, const char *value
)
959 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
964 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
965 the library-specific handler if it is installed for the current target. */
968 solib_global_lookup (const struct objfile
*objfile
,
970 const char *linkage_name
,
971 const domain_enum domain
,
972 struct symtab
**symtab
)
974 if (current_target_so_ops
->lookup_lib_global_symbol
!= NULL
)
975 return current_target_so_ops
->lookup_lib_global_symbol (objfile
,
976 name
, linkage_name
, domain
, symtab
);
982 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
985 _initialize_solib (void)
987 struct cmd_list_element
*c
;
989 solib_data
= gdbarch_data_register_pre_init (solib_init
);
991 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
992 _("Load shared object library symbols for files matching REGEXP."));
993 add_info ("sharedlibrary", info_sharedlibrary_command
,
994 _("Status of loaded shared object libraries."));
995 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
996 _("Unload all shared object library symbols."));
998 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
999 &auto_solib_add
, _("\
1000 Set autoloading of shared library symbols."), _("\
1001 Show autoloading of shared library symbols."), _("\
1002 If \"on\", symbols from all shared object libraries will be loaded\n\
1003 automatically when the inferior begins execution, when the dynamic linker\n\
1004 informs gdb that a new library has been loaded, or when attaching to the\n\
1005 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
1007 show_auto_solib_add
,
1008 &setlist
, &showlist
);
1010 add_setshow_filename_cmd ("sysroot", class_support
,
1012 Set an alternate system root."), _("\
1013 Show the current system root."), _("\
1014 The system root is used to load absolute shared library symbol files.\n\
1015 For other (relative) files, you can add directories using\n\
1016 `set solib-search-path'."),
1017 reload_shared_libraries
,
1019 &setlist
, &showlist
);
1021 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1023 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1026 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1027 &solib_search_path
, _("\
1028 Set the search path for loading non-absolute shared library symbol files."), _("\
1029 Show the search path for loading non-absolute shared library symbol files."), _("\
1030 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
1031 reload_shared_libraries
,
1032 show_solib_search_path
,
1033 &setlist
, &showlist
);