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, 2009
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"
51 /* Architecture-specific operations. */
53 /* Per-architecture data key. */
54 static struct gdbarch_data
*solib_data
;
57 solib_init (struct obstack
*obstack
)
59 struct target_so_ops
**ops
;
61 ops
= OBSTACK_ZALLOC (obstack
, struct target_so_ops
*);
62 *ops
= current_target_so_ops
;
66 static struct target_so_ops
*
67 solib_ops (struct gdbarch
*gdbarch
)
69 struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
73 /* Set the solib operations for GDBARCH to NEW_OPS. */
76 set_solib_ops (struct gdbarch
*gdbarch
, struct target_so_ops
*new_ops
)
78 struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
83 /* external data declarations */
85 /* FIXME: gdbarch needs to control this variable, or else every
86 configuration needs to call set_solib_ops. */
87 struct target_so_ops
*current_target_so_ops
;
89 /* local data declarations */
91 static struct so_list
*so_list_head
; /* List of known shared objects */
93 /* Local function prototypes */
95 /* If non-empty, this is a search path for loading non-absolute shared library
96 symbol files. This takes precedence over the environment variables PATH
97 and LD_LIBRARY_PATH. */
98 static char *solib_search_path
= NULL
;
100 show_solib_search_path (struct ui_file
*file
, int from_tty
,
101 struct cmd_list_element
*c
, const char *value
)
103 fprintf_filtered (file
, _("\
104 The search path for loading non-absolute shared library symbol files is %s.\n"),
112 solib_find -- Find a shared library file.
116 char *solib_find (char *in_pathname, int *fd);
120 Global variable GDB_SYSROOT is used as a prefix directory
121 to search for shared libraries if they have an absolute path.
123 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
124 (or set of directories, as in LD_LIBRARY_PATH) to search for all
125 shared libraries if not found in GDB_SYSROOT.
128 * If there is a gdb_sysroot and path is absolute:
129 * Search for gdb_sysroot/path.
131 * Look for it literally (unmodified).
132 * Look in SOLIB_SEARCH_PATH.
133 * If available, use target defined search function.
134 * If gdb_sysroot is NOT set, perform the following two searches:
135 * Look in inferior's $PATH.
136 * Look in inferior's $LD_LIBRARY_PATH.
138 * The last check avoids doing this search when targetting remote
139 * machines since gdb_sysroot will almost always be set.
143 Full pathname of the shared library file, or NULL if not found.
144 (The pathname is malloc'ed; it needs to be freed by the caller.)
145 *FD is set to either -1 or an open file handle for the library. */
148 solib_find (char *in_pathname
, int *fd
)
150 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
152 char *temp_pathname
= NULL
;
153 int gdb_sysroot_is_empty
;
155 gdb_sysroot_is_empty
= (gdb_sysroot
== NULL
|| *gdb_sysroot
== 0);
157 if (! IS_ABSOLUTE_PATH (in_pathname
) || gdb_sysroot_is_empty
)
158 temp_pathname
= in_pathname
;
161 int prefix_len
= strlen (gdb_sysroot
);
163 /* Remove trailing slashes from absolute prefix. */
164 while (prefix_len
> 0
165 && IS_DIR_SEPARATOR (gdb_sysroot
[prefix_len
- 1]))
168 /* Cat the prefixed pathname together. */
169 temp_pathname
= alloca (prefix_len
+ strlen (in_pathname
) + 1);
170 strncpy (temp_pathname
, gdb_sysroot
, prefix_len
);
171 temp_pathname
[prefix_len
] = '\0';
172 strcat (temp_pathname
, in_pathname
);
175 /* Handle remote files. */
176 if (remote_filename_p (temp_pathname
))
179 return xstrdup (temp_pathname
);
182 /* Now see if we can open it. */
183 found_file
= open (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
185 /* We try to find the library in various ways. After each attempt
186 (except for the one above), either found_file >= 0 and
187 temp_pathname is a malloc'd string, or found_file < 0 and
188 temp_pathname does not point to storage that needs to be
192 temp_pathname
= NULL
;
194 temp_pathname
= xstrdup (temp_pathname
);
196 /* If the search in gdb_sysroot failed, and the path name is
197 absolute at this point, make it relative. (openp will try and open the
198 file according to its absolute path otherwise, which is not what we want.)
199 Affects subsequent searches for this solib. */
200 if (found_file
< 0 && IS_ABSOLUTE_PATH (in_pathname
))
202 /* First, get rid of any drive letters etc. */
203 while (!IS_DIR_SEPARATOR (*in_pathname
))
206 /* Next, get rid of all leading dir separators. */
207 while (IS_DIR_SEPARATOR (*in_pathname
))
211 /* If not found, search the solib_search_path (if any). */
212 if (found_file
< 0 && solib_search_path
!= NULL
)
213 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
214 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
216 /* If not found, next search the solib_search_path (if any) for the basename
217 only (ignoring the path). This is to allow reading solibs from a path
218 that differs from the opened path. */
219 if (found_file
< 0 && solib_search_path
!= NULL
)
220 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
221 lbasename (in_pathname
), O_RDONLY
| O_BINARY
,
224 /* If not found, try to use target supplied solib search method */
225 if (found_file
< 0 && ops
->find_and_open_solib
)
226 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
229 /* If not found, next search the inferior's $PATH environment variable. */
230 if (found_file
< 0 && gdb_sysroot_is_empty
)
231 found_file
= openp (get_in_environ (inferior_environ
, "PATH"),
232 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
235 /* If not found, next search the inferior's $LD_LIBRARY_PATH
236 environment variable. */
237 if (found_file
< 0 && gdb_sysroot_is_empty
)
238 found_file
= openp (get_in_environ (inferior_environ
, "LD_LIBRARY_PATH"),
239 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
243 return temp_pathname
;
246 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
247 it is used as file handle to open the file. Throws an error if the file
248 could not be opened. Handles both local and remote file access.
250 PATHNAME must be malloc'ed by the caller. If successful, the new BFD's
251 name will point to it. If unsuccessful, PATHNAME will be freed and the
252 FD will be closed (unless FD was -1). */
255 solib_bfd_fopen (char *pathname
, int fd
)
259 if (remote_filename_p (pathname
))
261 gdb_assert (fd
== -1);
262 abfd
= remote_bfd_open (pathname
, gnutarget
);
266 abfd
= bfd_fopen (pathname
, gnutarget
, FOPEN_RB
, fd
);
269 bfd_set_cacheable (abfd
, 1);
276 make_cleanup (xfree
, pathname
);
277 error (_("Could not open `%s' as an executable file: %s"),
278 pathname
, bfd_errmsg (bfd_get_error ()));
284 /* Find shared library PATHNAME and open a BFD for it. */
287 solib_bfd_open (char *pathname
)
289 char *found_pathname
;
292 const struct bfd_arch_info
*b
;
294 /* Search for shared library file. */
295 found_pathname
= solib_find (pathname
, &found_file
);
296 if (found_pathname
== NULL
)
297 perror_with_name (pathname
);
299 /* Open bfd for shared library. */
300 abfd
= solib_bfd_fopen (found_pathname
, found_file
);
302 /* Check bfd format. */
303 if (!bfd_check_format (abfd
, bfd_object
))
306 make_cleanup (xfree
, found_pathname
);
307 error (_("`%s': not in executable format: %s"),
308 found_pathname
, bfd_errmsg (bfd_get_error ()));
311 /* Check bfd arch. */
312 b
= gdbarch_bfd_arch_info (target_gdbarch
);
313 if (!b
->compatible (b
, bfd_get_arch_info (abfd
)))
314 warning (_("`%s': Shared library architecture %s is not compatible "
315 "with target architecture %s."), found_pathname
,
316 bfd_get_arch_info (abfd
)->printable_name
, b
->printable_name
);
326 solib_map_sections -- open bfd and build sections for shared lib
330 static int solib_map_sections (struct so_list *so)
334 Given a pointer to one of the shared objects in our list
335 of mapped objects, use the recorded name to open a bfd
336 descriptor for the object, build a section table, and then
337 relocate all the section addresses by the base address at
338 which the shared object was mapped.
342 In most (all?) cases the shared object file name recorded in the
343 dynamic linkage tables will be a fully qualified pathname. For
344 cases where it isn't, do we really mimic the systems search
345 mechanism correctly in the below code (particularly the tilde
350 solib_map_sections (void *arg
)
352 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errors bogon */
353 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
355 struct target_section
*p
;
356 struct cleanup
*old_chain
;
359 filename
= tilde_expand (so
->so_name
);
360 old_chain
= make_cleanup (xfree
, filename
);
361 abfd
= ops
->bfd_open (filename
);
362 do_cleanups (old_chain
);
364 /* Leave bfd open, core_xfer_memory and "info files" need it. */
365 so
->abfd
= gdb_bfd_ref (abfd
);
367 /* copy full path name into so_name, so that later symbol_file_add
369 if (strlen (bfd_get_filename (abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
370 error (_("Shared library file name is too long."));
371 strcpy (so
->so_name
, bfd_get_filename (abfd
));
373 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
375 error (_("Can't find the file sections in `%s': %s"),
376 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
379 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
381 /* Relocate the section binding addresses as recorded in the shared
382 object's file by the base address to which the object was actually
384 ops
->relocate_section_addresses (so
, p
);
386 /* If the target didn't provide information about the address
387 range of the shared object, assume we want the location of
388 the .text section. */
389 if (so
->addr_low
== 0 && so
->addr_high
== 0
390 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
392 so
->addr_low
= p
->addr
;
393 so
->addr_high
= p
->endaddr
;
402 free_so --- free a `struct so_list' object
406 void free_so (struct so_list *so)
410 Free the storage associated with the `struct so_list' object SO.
411 If we have opened a BFD for SO, close it.
413 The caller is responsible for removing SO from whatever list it is
414 a member of. If we have placed SO's sections in some target's
415 section table, the caller is responsible for removing them.
417 This function doesn't mess with objfiles at all. If there is an
418 objfile associated with SO that needs to be removed, the caller is
419 responsible for taking care of that. */
422 free_so (struct so_list
*so
)
424 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
427 xfree (so
->sections
);
429 gdb_bfd_unref (so
->abfd
);
437 /* Return address of first so_list entry in master shared object list. */
439 master_so_list (void)
445 symbol_add_stub (struct so_list
*so
, int flags
)
447 struct section_addr_info
*sap
;
449 /* Have we already loaded this shared object? */
450 ALL_OBJFILES (so
->objfile
)
452 if (strcmp (so
->objfile
->name
, so
->so_name
) == 0)
456 sap
= build_section_addr_info_from_section_table (so
->sections
,
459 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, flags
, sap
, OBJF_SHARED
);
460 free_section_addr_info (sap
);
465 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
466 be chatty about it. Return non-zero if any symbols were actually
470 solib_read_symbols (struct so_list
*so
, int flags
)
472 const int from_tty
= flags
& SYMFILE_VERBOSE
;
474 if (so
->symbols_loaded
)
476 if (from_tty
|| info_verbose
)
477 printf_unfiltered (_("Symbols already loaded for %s\n"), so
->so_name
);
479 else if (so
->abfd
== NULL
)
481 if (from_tty
|| info_verbose
)
482 printf_unfiltered (_("Symbol file not found for %s\n"), so
->so_name
);
486 volatile struct gdb_exception exception
;
487 TRY_CATCH (exception
, RETURN_MASK_ALL
)
489 symbol_add_stub (so
, flags
);
491 if (exception
.reason
!= 0)
493 exception_fprintf (gdb_stderr
, exception
,
494 "Error while reading shared library symbols:\n");
497 if (from_tty
|| info_verbose
)
498 printf_unfiltered (_("Loaded symbols for %s\n"), so
->so_name
);
499 so
->symbols_loaded
= 1;
508 update_solib_list --- synchronize GDB's shared object list with inferior's
512 void update_solib_list (int from_tty, struct target_ops *TARGET)
514 Extract the list of currently loaded shared objects from the
515 inferior, and compare it with the list of shared objects currently
516 in GDB's so_list_head list. Edit so_list_head to bring it in sync
517 with the inferior's new list.
519 If we notice that the inferior has unloaded some shared objects,
520 free any symbolic info GDB had read about those shared objects.
522 Don't load symbolic info for any new shared objects; just add them
523 to the list, and leave their symbols_loaded flag clear.
525 If FROM_TTY is non-null, feel free to print messages about what
528 If TARGET is non-null, add the sections of all new shared objects
529 to TARGET's section table. Note that this doesn't remove any
530 sections for shared objects that have been unloaded, and it
531 doesn't check to see if the new shared objects are already present in
532 the section table. But we only use this for core files and
533 processes we've just attached to, so that's okay. */
536 update_solib_list (int from_tty
, struct target_ops
*target
)
538 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
539 struct so_list
*inferior
= ops
->current_sos();
540 struct so_list
*gdb
, **gdb_link
;
542 /* We can reach here due to changing solib-search-path or the
543 sysroot, before having any inferior. */
544 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
546 struct inferior
*inf
= current_inferior ();
548 /* If we are attaching to a running process for which we
549 have not opened a symbol file, we may be able to get its
551 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
552 catch_errors (ops
->open_symbol_file_object
, &from_tty
,
553 "Error reading attached process's symbol file.\n",
557 /* GDB and the inferior's dynamic linker each maintain their own
558 list of currently loaded shared objects; we want to bring the
559 former in sync with the latter. Scan both lists, seeing which
560 shared objects appear where. There are three cases:
562 - A shared object appears on both lists. This means that GDB
563 knows about it already, and it's still loaded in the inferior.
564 Nothing needs to happen.
566 - A shared object appears only on GDB's list. This means that
567 the inferior has unloaded it. We should remove the shared
568 object from GDB's tables.
570 - A shared object appears only on the inferior's list. This
571 means that it's just been loaded. We should add it to GDB's
574 So we walk GDB's list, checking each entry to see if it appears
575 in the inferior's list too. If it does, no action is needed, and
576 we remove it from the inferior's list. If it doesn't, the
577 inferior has unloaded it, and we remove it from GDB's list. By
578 the time we're done walking GDB's list, the inferior's list
579 contains only the new shared objects, which we then add. */
582 gdb_link
= &so_list_head
;
585 struct so_list
*i
= inferior
;
586 struct so_list
**i_link
= &inferior
;
588 /* Check to see whether the shared object *gdb also appears in
589 the inferior's current list. */
594 if (ops
->same (gdb
, i
))
599 if (! strcmp (gdb
->so_original_name
, i
->so_original_name
))
607 /* If the shared object appears on the inferior's list too, then
608 it's still loaded, so we don't need to do anything. Delete
609 it from the inferior's list, and leave it on GDB's list. */
614 gdb_link
= &gdb
->next
;
618 /* If it's not on the inferior's list, remove it from GDB's tables. */
621 /* Notify any observer that the shared object has been
622 unloaded before we remove it from GDB's tables. */
623 observer_notify_solib_unloaded (gdb
);
625 *gdb_link
= gdb
->next
;
627 /* Unless the user loaded it explicitly, free SO's objfile. */
628 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
))
629 free_objfile (gdb
->objfile
);
631 /* Some targets' section tables might be referring to
632 sections from so->abfd; remove them. */
633 remove_target_sections (gdb
->abfd
);
640 /* Now the inferior's list contains only shared objects that don't
641 appear in GDB's list --- those that are newly loaded. Add them
642 to GDB's shared object list. */
647 /* Add the new shared objects to GDB's list. */
648 *gdb_link
= inferior
;
650 /* Fill in the rest of each of the `struct so_list' nodes. */
651 for (i
= inferior
; i
; i
= i
->next
)
653 i
->from_tty
= from_tty
;
655 /* Fill in the rest of the `struct so_list' node. */
656 catch_errors (solib_map_sections
, i
,
657 "Error while mapping shared library sections:\n",
660 /* Add the shared object's sections to the current set of
661 file section tables. Do this immediately after mapping
662 the object so that later nodes in the list can query this
663 object, as is needed in solib-osf.c. */
664 add_target_sections (i
->sections
, i
->sections_end
);
666 /* Notify any observer that the shared object has been
667 loaded now that we've added it to GDB's tables. */
668 observer_notify_solib_loaded (i
);
674 /* Return non-zero if NAME is the libpthread shared library.
676 Uses a fairly simplistic heuristic approach where we check
677 the file name against "/libpthread". This can lead to false
678 positives, but this should be good enough in practice. */
681 libpthread_name_p (const char *name
)
683 return (strstr (name
, "/libpthread") != NULL
);
686 /* Return non-zero if SO is the libpthread shared library. */
689 libpthread_solib_p (struct so_list
*so
)
691 return libpthread_name_p (so
->so_name
);
696 solib_add -- read in symbol info for newly added shared libraries
700 void solib_add (char *pattern, int from_tty, struct target_ops
701 *TARGET, int readsyms)
705 Read in symbolic information for any shared objects whose names
706 match PATTERN. (If we've already read a shared object's symbol
707 info, leave it alone.) If PATTERN is zero, read them all.
709 If READSYMS is 0, defer reading symbolic information until later
710 but still do any needed low level processing.
712 FROM_TTY and TARGET are as described for update_solib_list, above. */
715 solib_add (char *pattern
, int from_tty
, struct target_ops
*target
, int readsyms
)
721 char *re_err
= re_comp (pattern
);
724 error (_("Invalid regexp: %s"), re_err
);
727 update_solib_list (from_tty
, target
);
729 /* Walk the list of currently loaded shared libraries, and read
730 symbols for any that match the pattern --- or any whose symbols
731 aren't already loaded, if no pattern was given. */
734 int loaded_any_symbols
= 0;
736 SYMFILE_DEFER_BP_RESET
| (from_tty
? SYMFILE_VERBOSE
: 0);
738 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
739 if (! pattern
|| re_exec (gdb
->so_name
))
741 /* Normally, we would read the symbols from that library
742 only if READSYMS is set. However, we're making a small
743 exception for the pthread library, because we sometimes
744 need the library symbols to be loaded in order to provide
745 thread support (x86-linux for instance). */
746 const int add_this_solib
=
747 (readsyms
|| libpthread_solib_p (gdb
));
750 if (add_this_solib
&& solib_read_symbols (gdb
, flags
))
751 loaded_any_symbols
= 1;
754 if (loaded_any_symbols
)
755 breakpoint_re_set ();
757 if (from_tty
&& pattern
&& ! any_matches
)
759 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
761 if (loaded_any_symbols
)
763 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
765 /* Getting new symbols may change our opinion about what is
767 reinit_frame_cache ();
769 ops
->special_symbol_handling ();
779 info_sharedlibrary_command -- code for "info sharedlibrary"
783 static void info_sharedlibrary_command ()
787 Walk through the shared library list and print information
788 about each attached library matching PATTERN. If PATTERN is elided,
793 info_sharedlibrary_command (char *pattern
, int from_tty
)
795 struct so_list
*so
= NULL
; /* link map state variable */
797 int so_missing_debug_info
= 0;
800 struct cleanup
*table_cleanup
;
801 struct gdbarch
*gdbarch
= target_gdbarch
;
805 char *re_err
= re_comp (pattern
);
808 error (_("Invalid regexp: %s"), re_err
);
811 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
812 addr_width
= 4 + (gdbarch_ptr_bit (gdbarch
) / 4);
814 update_solib_list (from_tty
, 0);
816 /* make_cleanup_ui_out_table_begin_end needs to know the number of
817 rows, so we need to make two passes over the libs. */
819 for (nr_libs
= 0, so
= so_list_head
; so
; so
= so
->next
)
823 if (pattern
&& ! re_exec (so
->so_name
))
830 make_cleanup_ui_out_table_begin_end (uiout
, 4, nr_libs
,
831 "SharedLibraryTable");
833 /* The "- 1" is because ui_out adds one space between columns. */
834 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "from", "From");
835 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "to", "To");
836 ui_out_table_header (uiout
, 12 - 1, ui_left
, "syms-read", "Syms Read");
837 ui_out_table_header (uiout
, 0, ui_noalign
,
838 "name", "Shared Object Library");
840 ui_out_table_body (uiout
);
842 for (so
= so_list_head
; so
; so
= so
->next
)
844 struct cleanup
*lib_cleanup
;
846 if (! so
->so_name
[0])
848 if (pattern
&& ! re_exec (so
->so_name
))
851 lib_cleanup
= make_cleanup_ui_out_tuple_begin_end (uiout
, "lib");
853 if (so
->addr_high
!= 0)
855 ui_out_field_core_addr (uiout
, "from", gdbarch
, so
->addr_low
);
856 ui_out_field_core_addr (uiout
, "to", gdbarch
, so
->addr_high
);
860 ui_out_field_skip (uiout
, "from");
861 ui_out_field_skip (uiout
, "to");
864 if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))
865 && so
->symbols_loaded
866 && !objfile_has_partial_symbols (so
->objfile
)
867 && !objfile_has_full_symbols (so
->objfile
))
869 so_missing_debug_info
= 1;
870 ui_out_field_string (uiout
, "syms-read", "Yes (*)");
873 ui_out_field_string (uiout
, "syms-read",
874 so
->symbols_loaded
? "Yes" : "No");
876 ui_out_field_string (uiout
, "name", so
->so_name
);
878 ui_out_text (uiout
, "\n");
880 do_cleanups (lib_cleanup
);
883 do_cleanups (table_cleanup
);
888 ui_out_message (uiout
, 0,
889 _("No shared libraries matched.\n"));
891 ui_out_message (uiout
, 0,
892 _("No shared libraries loaded at this time.\n"));
896 if (so_missing_debug_info
)
897 ui_out_message (uiout
, 0,
898 _("(*): Shared library is missing debugging information.\n"));
902 /* Return 1 if ADDRESS lies within SOLIB. */
905 solib_contains_address_p (const struct so_list
*const solib
,
908 struct target_section
*p
;
910 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
911 if (p
->addr
<= address
&& address
< p
->endaddr
)
921 solib_name_from_address -- if an address is in a shared lib, return
926 char * solib_name_from_address (CORE_ADDR address)
930 Provides a hook for other gdb routines to discover whether or
931 not a particular address is within the mapped address space of
934 For example, this routine is called at one point to disable
935 breakpoints which are in shared libraries that are not currently
940 solib_name_from_address (CORE_ADDR address
)
942 struct so_list
*so
= 0; /* link map state variable */
944 for (so
= so_list_head
; so
; so
= so
->next
)
945 if (solib_contains_address_p (so
, address
))
946 return (so
->so_name
);
951 /* Called by free_all_symtabs */
956 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
958 /* This function is expected to handle ELF shared libraries. It is
959 also used on Solaris, which can run either ELF or a.out binaries
960 (for compatibility with SunOS 4), both of which can use shared
961 libraries. So we don't know whether we have an ELF executable or
962 an a.out executable until the user chooses an executable file.
964 ELF shared libraries don't get mapped into the address space
965 until after the program starts, so we'd better not try to insert
966 breakpoints in them immediately. We have to wait until the
967 dynamic linker has loaded them; we'll hit a bp_shlib_event
968 breakpoint (look for calls to create_solib_event_breakpoint) when
971 SunOS shared libraries seem to be different --- they're present
972 as soon as the process begins execution, so there's no need to
973 put off inserting breakpoints. There's also nowhere to put a
974 bp_shlib_event breakpoint, so if we put it off, we'll never get
977 So: disable breakpoints only if we're using ELF shared libs. */
979 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
980 disable_breakpoints_in_shlibs ();
984 struct so_list
*so
= so_list_head
;
985 so_list_head
= so
->next
;
986 observer_notify_solib_unloaded (so
);
988 remove_target_sections (so
->abfd
);
997 solib_create_inferior_hook -- shared library startup support
1001 void solib_create_inferior_hook ()
1005 When gdb starts up the inferior, it nurses it along (through the
1006 shell) until it is ready to execute it's first instruction. At this
1007 point, this function gets called via expansion of the macro
1008 SOLIB_CREATE_INFERIOR_HOOK. */
1011 solib_create_inferior_hook (void)
1013 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1014 ops
->solib_create_inferior_hook();
1019 in_solib_dynsym_resolve_code -- check to see if an address is in
1020 dynamic loader's dynamic symbol
1025 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
1029 Determine if PC is in the dynamic linker's symbol resolution
1030 code. Return 1 if so, 0 otherwise.
1034 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
1036 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1037 return ops
->in_dynsym_resolve_code (pc
);
1044 sharedlibrary_command -- handle command to explicitly add library
1048 static void sharedlibrary_command (char *args, int from_tty)
1055 sharedlibrary_command (char *args
, int from_tty
)
1058 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
1063 no_shared_libraries -- handle command to explicitly discard symbols
1064 from shared libraries.
1068 Implements the command "nosharedlibrary", which discards symbols
1069 that have been auto-loaded from shared libraries. Symbols from
1070 shared libraries that were added by explicit request of the user
1071 are not discarded. Also called from remote.c. */
1074 no_shared_libraries (char *ignored
, int from_tty
)
1076 /* The order of the two routines below is important: clear_solib notifies
1077 the solib_unloaded observers, and some of these observers might need
1078 access to their associated objfiles. Therefore, we can not purge the
1079 solibs' objfiles before clear_solib has been called. */
1082 objfile_purge_solibs ();
1086 reload_shared_libraries (char *ignored
, int from_tty
,
1087 struct cmd_list_element
*e
)
1089 no_shared_libraries (NULL
, from_tty
);
1090 solib_add (NULL
, from_tty
, NULL
, auto_solib_add
);
1091 /* Creating inferior hooks here has two purposes. First, if we reload
1092 shared libraries then the address of solib breakpoint we've computed
1093 previously might be no longer valid. For example, if we forgot to set
1094 solib-absolute-prefix and are setting it right now, then the previous
1095 breakpoint address is plain wrong. Second, installing solib hooks
1096 also implicitly figures were ld.so is and loads symbols for it.
1097 Absent this call, if we've just connected to a target and set
1098 solib-absolute-prefix or solib-search-path, we'll lose all information
1100 if (target_has_execution
)
1102 #ifdef SOLIB_CREATE_INFERIOR_HOOK
1103 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
1105 solib_create_inferior_hook ();
1108 /* We have unloaded and then reloaded debug info for all shared libraries.
1109 However, frames may still reference them, for example a frame's
1110 unwinder might still point of DWARF FDE structures that are now freed.
1111 Reinit frame cache to avoid crashing. */
1112 reinit_frame_cache ();
1116 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1117 struct cmd_list_element
*c
, const char *value
)
1119 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1124 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1125 the library-specific handler if it is installed for the current target. */
1128 solib_global_lookup (const struct objfile
*objfile
,
1130 const char *linkage_name
,
1131 const domain_enum domain
)
1133 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1135 if (ops
->lookup_lib_global_symbol
!= NULL
)
1136 return ops
->lookup_lib_global_symbol (objfile
, name
, linkage_name
, domain
);
1141 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
1144 _initialize_solib (void)
1146 struct cmd_list_element
*c
;
1148 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1150 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1151 _("Load shared object library symbols for files matching REGEXP."));
1152 add_info ("sharedlibrary", info_sharedlibrary_command
,
1153 _("Status of loaded shared object libraries."));
1154 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1155 _("Unload all shared object library symbols."));
1157 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1158 &auto_solib_add
, _("\
1159 Set autoloading of shared library symbols."), _("\
1160 Show autoloading of shared library symbols."), _("\
1161 If \"on\", symbols from all shared object libraries will be loaded\n\
1162 automatically when the inferior begins execution, when the dynamic linker\n\
1163 informs gdb that a new library has been loaded, or when attaching to the\n\
1164 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
1166 show_auto_solib_add
,
1167 &setlist
, &showlist
);
1169 add_setshow_filename_cmd ("sysroot", class_support
,
1171 Set an alternate system root."), _("\
1172 Show the current system root."), _("\
1173 The system root is used to load absolute shared library symbol files.\n\
1174 For other (relative) files, you can add directories using\n\
1175 `set solib-search-path'."),
1176 reload_shared_libraries
,
1178 &setlist
, &showlist
);
1180 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1182 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1185 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1186 &solib_search_path
, _("\
1187 Set the search path for loading non-absolute shared library symbol files."), _("\
1188 Show the search path for loading non-absolute shared library symbol files."), _("\
1189 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
1190 reload_shared_libraries
,
1191 show_solib_search_path
,
1192 &setlist
, &showlist
);