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, 2010
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 /* List of known shared objects */
90 #define so_list_head current_program_space->so_list
92 /* Local function prototypes */
94 /* If non-empty, this is a search path for loading non-absolute shared library
95 symbol files. This takes precedence over the environment variables PATH
96 and LD_LIBRARY_PATH. */
97 static char *solib_search_path
= NULL
;
99 show_solib_search_path (struct ui_file
*file
, int from_tty
,
100 struct cmd_list_element
*c
, const char *value
)
102 fprintf_filtered (file
, _("\
103 The search path for loading non-absolute shared library symbol files is %s.\n"),
111 solib_find -- Find a shared library file.
115 char *solib_find (char *in_pathname, int *fd);
119 Global variable GDB_SYSROOT is used as a prefix directory
120 to search for shared libraries if they have an absolute path.
122 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
123 (or set of directories, as in LD_LIBRARY_PATH) to search for all
124 shared libraries if not found in GDB_SYSROOT.
127 * If there is a gdb_sysroot and path is absolute:
128 * Search for gdb_sysroot/path.
130 * Look for it literally (unmodified).
131 * Look in SOLIB_SEARCH_PATH.
132 * If available, use target defined search function.
133 * If gdb_sysroot is NOT set, perform the following two searches:
134 * Look in inferior's $PATH.
135 * Look in inferior's $LD_LIBRARY_PATH.
137 * The last check avoids doing this search when targetting remote
138 * machines since gdb_sysroot will almost always be set.
142 Full pathname of the shared library file, or NULL if not found.
143 (The pathname is malloc'ed; it needs to be freed by the caller.)
144 *FD is set to either -1 or an open file handle for the library. */
147 solib_find (char *in_pathname
, int *fd
)
149 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
151 char *temp_pathname
= NULL
;
152 int gdb_sysroot_is_empty
;
154 gdb_sysroot_is_empty
= (gdb_sysroot
== NULL
|| *gdb_sysroot
== 0);
156 if (! IS_ABSOLUTE_PATH (in_pathname
) || gdb_sysroot_is_empty
)
157 temp_pathname
= in_pathname
;
160 int prefix_len
= strlen (gdb_sysroot
);
162 /* Remove trailing slashes from absolute prefix. */
163 while (prefix_len
> 0
164 && IS_DIR_SEPARATOR (gdb_sysroot
[prefix_len
- 1]))
167 /* Cat the prefixed pathname together. */
168 temp_pathname
= alloca (prefix_len
+ strlen (in_pathname
) + 1);
169 strncpy (temp_pathname
, gdb_sysroot
, prefix_len
);
170 temp_pathname
[prefix_len
] = '\0';
171 strcat (temp_pathname
, in_pathname
);
174 /* Handle remote files. */
175 if (remote_filename_p (temp_pathname
))
178 return xstrdup (temp_pathname
);
181 /* Now see if we can open it. */
182 found_file
= open (temp_pathname
, O_RDONLY
| O_BINARY
, 0);
184 /* We try to find the library in various ways. After each attempt
185 (except for the one above), either found_file >= 0 and
186 temp_pathname is a malloc'd string, or found_file < 0 and
187 temp_pathname does not point to storage that needs to be
191 temp_pathname
= NULL
;
193 temp_pathname
= xstrdup (temp_pathname
);
195 /* If the search in gdb_sysroot failed, and the path name is
196 absolute at this point, make it relative. (openp will try and open the
197 file according to its absolute path otherwise, which is not what we want.)
198 Affects subsequent searches for this solib. */
199 if (found_file
< 0 && IS_ABSOLUTE_PATH (in_pathname
))
201 /* First, get rid of any drive letters etc. */
202 while (!IS_DIR_SEPARATOR (*in_pathname
))
205 /* Next, get rid of all leading dir separators. */
206 while (IS_DIR_SEPARATOR (*in_pathname
))
210 /* If not found, search the solib_search_path (if any). */
211 if (found_file
< 0 && solib_search_path
!= NULL
)
212 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
213 in_pathname
, O_RDONLY
| O_BINARY
, &temp_pathname
);
215 /* If not found, next search the solib_search_path (if any) for the basename
216 only (ignoring the path). This is to allow reading solibs from a path
217 that differs from the opened path. */
218 if (found_file
< 0 && solib_search_path
!= NULL
)
219 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
220 lbasename (in_pathname
), O_RDONLY
| O_BINARY
,
223 /* If not found, try to use target supplied solib search method */
224 if (found_file
< 0 && ops
->find_and_open_solib
)
225 found_file
= ops
->find_and_open_solib (in_pathname
, O_RDONLY
| O_BINARY
,
228 /* If not found, next search the inferior's $PATH environment variable. */
229 if (found_file
< 0 && gdb_sysroot_is_empty
)
230 found_file
= openp (get_in_environ (current_inferior ()->environment
,
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 (current_inferior ()->environment
,
240 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
244 return temp_pathname
;
247 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
248 it is used as file handle to open the file. Throws an error if the file
249 could not be opened. Handles both local and remote file access.
251 PATHNAME must be malloc'ed by the caller. If successful, the new BFD's
252 name will point to it. If unsuccessful, PATHNAME will be freed and the
253 FD will be closed (unless FD was -1). */
256 solib_bfd_fopen (char *pathname
, int fd
)
260 if (remote_filename_p (pathname
))
262 gdb_assert (fd
== -1);
263 abfd
= remote_bfd_open (pathname
, gnutarget
);
267 abfd
= bfd_fopen (pathname
, gnutarget
, FOPEN_RB
, fd
);
270 bfd_set_cacheable (abfd
, 1);
277 make_cleanup (xfree
, pathname
);
278 error (_("Could not open `%s' as an executable file: %s"),
279 pathname
, bfd_errmsg (bfd_get_error ()));
285 /* Find shared library PATHNAME and open a BFD for it. */
288 solib_bfd_open (char *pathname
)
290 char *found_pathname
;
293 const struct bfd_arch_info
*b
;
295 /* Search for shared library file. */
296 found_pathname
= solib_find (pathname
, &found_file
);
297 if (found_pathname
== NULL
)
298 perror_with_name (pathname
);
300 /* Open bfd for shared library. */
301 abfd
= solib_bfd_fopen (found_pathname
, found_file
);
303 /* Check bfd format. */
304 if (!bfd_check_format (abfd
, bfd_object
))
307 make_cleanup (xfree
, found_pathname
);
308 error (_("`%s': not in executable format: %s"),
309 found_pathname
, bfd_errmsg (bfd_get_error ()));
312 /* Check bfd arch. */
313 b
= gdbarch_bfd_arch_info (target_gdbarch
);
314 if (!b
->compatible (b
, bfd_get_arch_info (abfd
)))
315 warning (_("`%s': Shared library architecture %s is not compatible "
316 "with target architecture %s."), found_pathname
,
317 bfd_get_arch_info (abfd
)->printable_name
, b
->printable_name
);
327 solib_map_sections -- open bfd and build sections for shared lib
331 static int solib_map_sections (struct so_list *so)
335 Given a pointer to one of the shared objects in our list
336 of mapped objects, use the recorded name to open a bfd
337 descriptor for the object, build a section table, and then
338 relocate all the section addresses by the base address at
339 which the shared object was mapped.
343 In most (all?) cases the shared object file name recorded in the
344 dynamic linkage tables will be a fully qualified pathname. For
345 cases where it isn't, do we really mimic the systems search
346 mechanism correctly in the below code (particularly the tilde
351 solib_map_sections (void *arg
)
353 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errors bogon */
354 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
356 struct target_section
*p
;
357 struct cleanup
*old_chain
;
360 filename
= tilde_expand (so
->so_name
);
361 old_chain
= make_cleanup (xfree
, filename
);
362 abfd
= ops
->bfd_open (filename
);
363 do_cleanups (old_chain
);
365 /* Leave bfd open, core_xfer_memory and "info files" need it. */
366 so
->abfd
= gdb_bfd_ref (abfd
);
368 /* copy full path name into so_name, so that later symbol_file_add
370 if (strlen (bfd_get_filename (abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
371 error (_("Shared library file name is too long."));
372 strcpy (so
->so_name
, bfd_get_filename (abfd
));
374 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
376 error (_("Can't find the file sections in `%s': %s"),
377 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
380 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
382 /* Relocate the section binding addresses as recorded in the shared
383 object's file by the base address to which the object was actually
385 ops
->relocate_section_addresses (so
, p
);
387 /* If the target didn't provide information about the address
388 range of the shared object, assume we want the location of
389 the .text section. */
390 if (so
->addr_low
== 0 && so
->addr_high
== 0
391 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
393 so
->addr_low
= p
->addr
;
394 so
->addr_high
= p
->endaddr
;
403 free_so --- free a `struct so_list' object
407 void free_so (struct so_list *so)
411 Free the storage associated with the `struct so_list' object SO.
412 If we have opened a BFD for SO, close it.
414 The caller is responsible for removing SO from whatever list it is
415 a member of. If we have placed SO's sections in some target's
416 section table, the caller is responsible for removing them.
418 This function doesn't mess with objfiles at all. If there is an
419 objfile associated with SO that needs to be removed, the caller is
420 responsible for taking care of that. */
423 free_so (struct so_list
*so
)
425 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
428 xfree (so
->sections
);
430 gdb_bfd_unref (so
->abfd
);
438 /* Return address of first so_list entry in master shared object list. */
440 master_so_list (void)
446 symbol_add_stub (struct so_list
*so
, int flags
)
448 struct section_addr_info
*sap
;
450 /* Have we already loaded this shared object? */
451 ALL_OBJFILES (so
->objfile
)
453 if (strcmp (so
->objfile
->name
, so
->so_name
) == 0)
457 sap
= build_section_addr_info_from_section_table (so
->sections
,
460 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, flags
, sap
, OBJF_SHARED
);
461 free_section_addr_info (sap
);
466 /* Read in symbols for shared object SO. If SYMFILE_VERBOSE is set in FLAGS,
467 be chatty about it. Return non-zero if any symbols were actually
471 solib_read_symbols (struct so_list
*so
, int flags
)
473 const int from_tty
= flags
& SYMFILE_VERBOSE
;
475 if (so
->symbols_loaded
)
477 if (from_tty
|| info_verbose
)
478 printf_unfiltered (_("Symbols already loaded for %s\n"), so
->so_name
);
480 else if (so
->abfd
== NULL
)
482 if (from_tty
|| info_verbose
)
483 printf_unfiltered (_("Symbol file not found for %s\n"), so
->so_name
);
487 volatile struct gdb_exception exception
;
488 TRY_CATCH (exception
, RETURN_MASK_ALL
)
490 symbol_add_stub (so
, flags
);
492 if (exception
.reason
!= 0)
494 exception_fprintf (gdb_stderr
, exception
,
495 "Error while reading shared library symbols:\n");
498 if (from_tty
|| info_verbose
)
499 printf_unfiltered (_("Loaded symbols for %s\n"), so
->so_name
);
500 so
->symbols_loaded
= 1;
509 update_solib_list --- synchronize GDB's shared object list with inferior's
513 void update_solib_list (int from_tty, struct target_ops *TARGET)
515 Extract the list of currently loaded shared objects from the
516 inferior, and compare it with the list of shared objects currently
517 in GDB's so_list_head list. Edit so_list_head to bring it in sync
518 with the inferior's new list.
520 If we notice that the inferior has unloaded some shared objects,
521 free any symbolic info GDB had read about those shared objects.
523 Don't load symbolic info for any new shared objects; just add them
524 to the list, and leave their symbols_loaded flag clear.
526 If FROM_TTY is non-null, feel free to print messages about what
529 If TARGET is non-null, add the sections of all new shared objects
530 to TARGET's section table. Note that this doesn't remove any
531 sections for shared objects that have been unloaded, and it
532 doesn't check to see if the new shared objects are already present in
533 the section table. But we only use this for core files and
534 processes we've just attached to, so that's okay. */
537 update_solib_list (int from_tty
, struct target_ops
*target
)
539 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
540 struct so_list
*inferior
= ops
->current_sos();
541 struct so_list
*gdb
, **gdb_link
;
543 /* We can reach here due to changing solib-search-path or the
544 sysroot, before having any inferior. */
545 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
547 struct inferior
*inf
= current_inferior ();
549 /* If we are attaching to a running process for which we
550 have not opened a symbol file, we may be able to get its
552 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
553 catch_errors (ops
->open_symbol_file_object
, &from_tty
,
554 "Error reading attached process's symbol file.\n",
558 /* GDB and the inferior's dynamic linker each maintain their own
559 list of currently loaded shared objects; we want to bring the
560 former in sync with the latter. Scan both lists, seeing which
561 shared objects appear where. There are three cases:
563 - A shared object appears on both lists. This means that GDB
564 knows about it already, and it's still loaded in the inferior.
565 Nothing needs to happen.
567 - A shared object appears only on GDB's list. This means that
568 the inferior has unloaded it. We should remove the shared
569 object from GDB's tables.
571 - A shared object appears only on the inferior's list. This
572 means that it's just been loaded. We should add it to GDB's
575 So we walk GDB's list, checking each entry to see if it appears
576 in the inferior's list too. If it does, no action is needed, and
577 we remove it from the inferior's list. If it doesn't, the
578 inferior has unloaded it, and we remove it from GDB's list. By
579 the time we're done walking GDB's list, the inferior's list
580 contains only the new shared objects, which we then add. */
583 gdb_link
= &so_list_head
;
586 struct so_list
*i
= inferior
;
587 struct so_list
**i_link
= &inferior
;
589 /* Check to see whether the shared object *gdb also appears in
590 the inferior's current list. */
595 if (ops
->same (gdb
, i
))
600 if (! strcmp (gdb
->so_original_name
, i
->so_original_name
))
608 /* If the shared object appears on the inferior's list too, then
609 it's still loaded, so we don't need to do anything. Delete
610 it from the inferior's list, and leave it on GDB's list. */
615 gdb_link
= &gdb
->next
;
619 /* If it's not on the inferior's list, remove it from GDB's tables. */
622 /* Notify any observer that the shared object has been
623 unloaded before we remove it from GDB's tables. */
624 observer_notify_solib_unloaded (gdb
);
626 *gdb_link
= gdb
->next
;
628 /* Unless the user loaded it explicitly, free SO's objfile. */
629 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
))
630 free_objfile (gdb
->objfile
);
632 /* Some targets' section tables might be referring to
633 sections from so->abfd; remove them. */
634 remove_target_sections (gdb
->abfd
);
641 /* Now the inferior's list contains only shared objects that don't
642 appear in GDB's list --- those that are newly loaded. Add them
643 to GDB's shared object list. */
648 /* Add the new shared objects to GDB's list. */
649 *gdb_link
= inferior
;
651 /* Fill in the rest of each of the `struct so_list' nodes. */
652 for (i
= inferior
; i
; i
= i
->next
)
654 i
->from_tty
= from_tty
;
655 i
->pspace
= current_program_space
;
657 /* Fill in the rest of the `struct so_list' node. */
658 catch_errors (solib_map_sections
, i
,
659 "Error while mapping shared library sections:\n",
662 /* Add the shared object's sections to the current set of
663 file section tables. Do this immediately after mapping
664 the object so that later nodes in the list can query this
665 object, as is needed in solib-osf.c. */
666 add_target_sections (i
->sections
, i
->sections_end
);
668 /* Notify any observer that the shared object has been
669 loaded now that we've added it to GDB's tables. */
670 observer_notify_solib_loaded (i
);
676 /* Return non-zero if NAME is the libpthread shared library.
678 Uses a fairly simplistic heuristic approach where we check
679 the file name against "/libpthread". This can lead to false
680 positives, but this should be good enough in practice. */
683 libpthread_name_p (const char *name
)
685 return (strstr (name
, "/libpthread") != NULL
);
688 /* Return non-zero if SO is the libpthread shared library. */
691 libpthread_solib_p (struct so_list
*so
)
693 return libpthread_name_p (so
->so_name
);
698 solib_add -- read in symbol info for newly added shared libraries
702 void solib_add (char *pattern, int from_tty, struct target_ops
703 *TARGET, int readsyms)
707 Read in symbolic information for any shared objects whose names
708 match PATTERN. (If we've already read a shared object's symbol
709 info, leave it alone.) If PATTERN is zero, read them all.
711 If READSYMS is 0, defer reading symbolic information until later
712 but still do any needed low level processing.
714 FROM_TTY and TARGET are as described for update_solib_list, above. */
717 solib_add (char *pattern
, int from_tty
, struct target_ops
*target
, int readsyms
)
723 char *re_err
= re_comp (pattern
);
726 error (_("Invalid regexp: %s"), re_err
);
729 update_solib_list (from_tty
, target
);
731 /* Walk the list of currently loaded shared libraries, and read
732 symbols for any that match the pattern --- or any whose symbols
733 aren't already loaded, if no pattern was given. */
736 int loaded_any_symbols
= 0;
738 SYMFILE_DEFER_BP_RESET
| (from_tty
? SYMFILE_VERBOSE
: 0);
740 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
741 if (! pattern
|| re_exec (gdb
->so_name
))
743 /* Normally, we would read the symbols from that library
744 only if READSYMS is set. However, we're making a small
745 exception for the pthread library, because we sometimes
746 need the library symbols to be loaded in order to provide
747 thread support (x86-linux for instance). */
748 const int add_this_solib
=
749 (readsyms
|| libpthread_solib_p (gdb
));
752 if (add_this_solib
&& solib_read_symbols (gdb
, flags
))
753 loaded_any_symbols
= 1;
756 if (loaded_any_symbols
)
757 breakpoint_re_set ();
759 if (from_tty
&& pattern
&& ! any_matches
)
761 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
763 if (loaded_any_symbols
)
765 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
767 /* Getting new symbols may change our opinion about what is
769 reinit_frame_cache ();
771 ops
->special_symbol_handling ();
781 info_sharedlibrary_command -- code for "info sharedlibrary"
785 static void info_sharedlibrary_command ()
789 Walk through the shared library list and print information
790 about each attached library matching PATTERN. If PATTERN is elided,
795 info_sharedlibrary_command (char *pattern
, int from_tty
)
797 struct so_list
*so
= NULL
; /* link map state variable */
799 int so_missing_debug_info
= 0;
802 struct cleanup
*table_cleanup
;
803 struct gdbarch
*gdbarch
= target_gdbarch
;
807 char *re_err
= re_comp (pattern
);
810 error (_("Invalid regexp: %s"), re_err
);
813 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
814 addr_width
= 4 + (gdbarch_ptr_bit (gdbarch
) / 4);
816 update_solib_list (from_tty
, 0);
818 /* make_cleanup_ui_out_table_begin_end needs to know the number of
819 rows, so we need to make two passes over the libs. */
821 for (nr_libs
= 0, so
= so_list_head
; so
; so
= so
->next
)
825 if (pattern
&& ! re_exec (so
->so_name
))
832 make_cleanup_ui_out_table_begin_end (uiout
, 4, nr_libs
,
833 "SharedLibraryTable");
835 /* The "- 1" is because ui_out adds one space between columns. */
836 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "from", "From");
837 ui_out_table_header (uiout
, addr_width
- 1, ui_left
, "to", "To");
838 ui_out_table_header (uiout
, 12 - 1, ui_left
, "syms-read", "Syms Read");
839 ui_out_table_header (uiout
, 0, ui_noalign
,
840 "name", "Shared Object Library");
842 ui_out_table_body (uiout
);
844 for (so
= so_list_head
; so
; so
= so
->next
)
846 struct cleanup
*lib_cleanup
;
848 if (! so
->so_name
[0])
850 if (pattern
&& ! re_exec (so
->so_name
))
853 lib_cleanup
= make_cleanup_ui_out_tuple_begin_end (uiout
, "lib");
855 if (so
->addr_high
!= 0)
857 ui_out_field_core_addr (uiout
, "from", gdbarch
, so
->addr_low
);
858 ui_out_field_core_addr (uiout
, "to", gdbarch
, so
->addr_high
);
862 ui_out_field_skip (uiout
, "from");
863 ui_out_field_skip (uiout
, "to");
866 if (! ui_out_is_mi_like_p (interp_ui_out (top_level_interpreter ()))
867 && so
->symbols_loaded
868 && !objfile_has_symbols (so
->objfile
))
870 so_missing_debug_info
= 1;
871 ui_out_field_string (uiout
, "syms-read", "Yes (*)");
874 ui_out_field_string (uiout
, "syms-read",
875 so
->symbols_loaded
? "Yes" : "No");
877 ui_out_field_string (uiout
, "name", so
->so_name
);
879 ui_out_text (uiout
, "\n");
881 do_cleanups (lib_cleanup
);
884 do_cleanups (table_cleanup
);
889 ui_out_message (uiout
, 0,
890 _("No shared libraries matched.\n"));
892 ui_out_message (uiout
, 0,
893 _("No shared libraries loaded at this time.\n"));
897 if (so_missing_debug_info
)
898 ui_out_message (uiout
, 0,
899 _("(*): Shared library is missing debugging information.\n"));
903 /* Return 1 if ADDRESS lies within SOLIB. */
906 solib_contains_address_p (const struct so_list
*const solib
,
909 struct target_section
*p
;
911 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
912 if (p
->addr
<= address
&& address
< p
->endaddr
)
922 solib_name_from_address -- if an address is in a shared lib, return
927 char * solib_name_from_address (CORE_ADDR address)
931 Provides a hook for other gdb routines to discover whether or
932 not a particular address is within the mapped address space of
935 For example, this routine is called at one point to disable
936 breakpoints which are in shared libraries that are not currently
941 solib_name_from_address (struct program_space
*pspace
, CORE_ADDR address
)
943 struct so_list
*so
= NULL
;
945 for (so
= pspace
->so_list
; so
; so
= so
->next
)
946 if (solib_contains_address_p (so
, address
))
947 return (so
->so_name
);
952 /* Return whether the data starting at VADDR, size SIZE, must be kept
953 in a core file for shared libraries loaded before "gcore" is used
954 to be handled correctly when the core file is loaded. This only
955 applies when the section would otherwise not be kept in the core
956 file (in particular, for readonly sections). */
959 solib_keep_data_in_core (CORE_ADDR vaddr
, unsigned long size
)
961 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
963 if (ops
->keep_data_in_core
)
964 return ops
->keep_data_in_core (vaddr
, size
);
969 /* Called by free_all_symtabs */
974 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
976 /* This function is expected to handle ELF shared libraries. It is
977 also used on Solaris, which can run either ELF or a.out binaries
978 (for compatibility with SunOS 4), both of which can use shared
979 libraries. So we don't know whether we have an ELF executable or
980 an a.out executable until the user chooses an executable file.
982 ELF shared libraries don't get mapped into the address space
983 until after the program starts, so we'd better not try to insert
984 breakpoints in them immediately. We have to wait until the
985 dynamic linker has loaded them; we'll hit a bp_shlib_event
986 breakpoint (look for calls to create_solib_event_breakpoint) when
989 SunOS shared libraries seem to be different --- they're present
990 as soon as the process begins execution, so there's no need to
991 put off inserting breakpoints. There's also nowhere to put a
992 bp_shlib_event breakpoint, so if we put it off, we'll never get
995 So: disable breakpoints only if we're using ELF shared libs. */
997 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
998 disable_breakpoints_in_shlibs ();
1000 while (so_list_head
)
1002 struct so_list
*so
= so_list_head
;
1003 so_list_head
= so
->next
;
1004 observer_notify_solib_unloaded (so
);
1006 remove_target_sections (so
->abfd
);
1010 ops
->clear_solib ();
1015 solib_create_inferior_hook -- shared library startup support
1019 void solib_create_inferior_hook (int from_tty)
1023 When gdb starts up the inferior, it nurses it along (through the
1024 shell) until it is ready to execute it's first instruction. At this
1025 point, this function gets called via expansion of the macro
1026 SOLIB_CREATE_INFERIOR_HOOK. */
1029 solib_create_inferior_hook (int from_tty
)
1031 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1032 ops
->solib_create_inferior_hook (from_tty
);
1037 in_solib_dynsym_resolve_code -- check to see if an address is in
1038 dynamic loader's dynamic symbol
1043 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
1047 Determine if PC is in the dynamic linker's symbol resolution
1048 code. Return 1 if so, 0 otherwise.
1052 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
1054 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1055 return ops
->in_dynsym_resolve_code (pc
);
1062 sharedlibrary_command -- handle command to explicitly add library
1066 static void sharedlibrary_command (char *args, int from_tty)
1073 sharedlibrary_command (char *args
, int from_tty
)
1076 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
1081 no_shared_libraries -- handle command to explicitly discard symbols
1082 from shared libraries.
1086 Implements the command "nosharedlibrary", which discards symbols
1087 that have been auto-loaded from shared libraries. Symbols from
1088 shared libraries that were added by explicit request of the user
1089 are not discarded. Also called from remote.c. */
1092 no_shared_libraries (char *ignored
, int from_tty
)
1094 /* The order of the two routines below is important: clear_solib notifies
1095 the solib_unloaded observers, and some of these observers might need
1096 access to their associated objfiles. Therefore, we can not purge the
1097 solibs' objfiles before clear_solib has been called. */
1100 objfile_purge_solibs ();
1104 reload_shared_libraries (char *ignored
, int from_tty
,
1105 struct cmd_list_element
*e
)
1107 no_shared_libraries (NULL
, from_tty
);
1108 /* Creating inferior hooks here has two purposes. First, if we reload
1109 shared libraries then the address of solib breakpoint we've computed
1110 previously might be no longer valid. For example, if we forgot to set
1111 solib-absolute-prefix and are setting it right now, then the previous
1112 breakpoint address is plain wrong. Second, installing solib hooks
1113 also implicitly figures were ld.so is and loads symbols for it.
1114 Absent this call, if we've just connected to a target and set
1115 solib-absolute-prefix or solib-search-path, we'll lose all information
1117 if (target_has_execution
)
1119 #ifdef SOLIB_CREATE_INFERIOR_HOOK
1120 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
1122 solib_create_inferior_hook (from_tty
);
1126 /* Sometimes the platform-specific hook loads initial shared
1127 libraries, and sometimes it doesn't. If it doesn't FROM_TTY will be
1128 incorrectly 0 but such solib targets should be fixed anyway. If we
1129 made all the inferior hook methods consistent, this call could be
1130 removed. Call it only after the solib target has been initialized by
1131 solib_create_inferior_hook. */
1133 solib_add (NULL
, 0, NULL
, auto_solib_add
);
1135 /* We have unloaded and then reloaded debug info for all shared libraries.
1136 However, frames may still reference them, for example a frame's
1137 unwinder might still point of DWARF FDE structures that are now freed.
1138 Reinit frame cache to avoid crashing. */
1139 reinit_frame_cache ();
1143 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1144 struct cmd_list_element
*c
, const char *value
)
1146 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1151 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1152 the library-specific handler if it is installed for the current target. */
1155 solib_global_lookup (const struct objfile
*objfile
,
1157 const char *linkage_name
,
1158 const domain_enum domain
)
1160 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1162 if (ops
->lookup_lib_global_symbol
!= NULL
)
1163 return ops
->lookup_lib_global_symbol (objfile
, name
, linkage_name
, domain
);
1168 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
1171 _initialize_solib (void)
1173 struct cmd_list_element
*c
;
1175 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1177 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1178 _("Load shared object library symbols for files matching REGEXP."));
1179 add_info ("sharedlibrary", info_sharedlibrary_command
,
1180 _("Status of loaded shared object libraries."));
1181 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1182 _("Unload all shared object library symbols."));
1184 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1185 &auto_solib_add
, _("\
1186 Set autoloading of shared library symbols."), _("\
1187 Show autoloading of shared library symbols."), _("\
1188 If \"on\", symbols from all shared object libraries will be loaded\n\
1189 automatically when the inferior begins execution, when the dynamic linker\n\
1190 informs gdb that a new library has been loaded, or when attaching to the\n\
1191 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
1193 show_auto_solib_add
,
1194 &setlist
, &showlist
);
1196 add_setshow_filename_cmd ("sysroot", class_support
,
1198 Set an alternate system root."), _("\
1199 Show the current system root."), _("\
1200 The system root is used to load absolute shared library symbol files.\n\
1201 For other (relative) files, you can add directories using\n\
1202 `set solib-search-path'."),
1203 reload_shared_libraries
,
1205 &setlist
, &showlist
);
1207 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1209 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1212 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1213 &solib_search_path
, _("\
1214 Set the search path for loading non-absolute shared library symbol files."), _("\
1215 Show the search path for loading non-absolute shared library symbol files."), _("\
1216 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
1217 reload_shared_libraries
,
1218 show_solib_search_path
,
1219 &setlist
, &showlist
);