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"
50 /* Architecture-specific operations. */
52 /* Per-architecture data key. */
53 static struct gdbarch_data
*solib_data
;
56 solib_init (struct obstack
*obstack
)
58 struct target_so_ops
**ops
;
60 ops
= OBSTACK_ZALLOC (obstack
, struct target_so_ops
*);
61 *ops
= current_target_so_ops
;
65 static struct target_so_ops
*
66 solib_ops (struct gdbarch
*gdbarch
)
68 struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
72 /* Set the solib operations for GDBARCH to NEW_OPS. */
75 set_solib_ops (struct gdbarch
*gdbarch
, struct target_so_ops
*new_ops
)
77 struct target_so_ops
**ops
= gdbarch_data (gdbarch
, solib_data
);
82 /* external data declarations */
84 /* FIXME: gdbarch needs to control this variable, or else every
85 configuration needs to call set_solib_ops. */
86 struct target_so_ops
*current_target_so_ops
;
88 /* local data declarations */
90 static struct so_list
*so_list_head
; /* List of known shared objects */
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 (inferior_environ
, "PATH"),
231 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
234 /* If not found, next search the inferior's $LD_LIBRARY_PATH
235 environment variable. */
236 if (found_file
< 0 && gdb_sysroot_is_empty
)
237 found_file
= openp (get_in_environ (inferior_environ
, "LD_LIBRARY_PATH"),
238 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
| O_BINARY
,
242 return temp_pathname
;
245 /* Open and return a BFD for the shared library PATHNAME. If FD is not -1,
246 it is used as file handle to open the file. Throws an error if the file
247 could not be opened. Handles both local and remote file access.
249 PATHNAME must be malloc'ed by the caller. If successful, the new BFD's
250 name will point to it. If unsuccessful, PATHNAME will be freed and the
251 FD will be closed (unless FD was -1). */
254 solib_bfd_fopen (char *pathname
, int fd
)
258 if (remote_filename_p (pathname
))
260 gdb_assert (fd
== -1);
261 abfd
= remote_bfd_open (pathname
, gnutarget
);
265 abfd
= bfd_fopen (pathname
, gnutarget
, FOPEN_RB
, fd
);
268 bfd_set_cacheable (abfd
, 1);
275 make_cleanup (xfree
, pathname
);
276 error (_("Could not open `%s' as an executable file: %s"),
277 pathname
, bfd_errmsg (bfd_get_error ()));
283 /* Find shared library PATHNAME and open a BFD for it. */
286 solib_bfd_open (char *pathname
)
288 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
289 char *found_pathname
;
293 /* Use target-specific override if present. */
295 return ops
->bfd_open (pathname
);
297 /* Search for shared library file. */
298 found_pathname
= solib_find (pathname
, &found_file
);
299 if (found_pathname
== NULL
)
300 perror_with_name (pathname
);
302 /* Open bfd for shared library. */
303 abfd
= solib_bfd_fopen (found_pathname
, found_file
);
305 /* Check bfd format. */
306 if (!bfd_check_format (abfd
, bfd_object
))
309 make_cleanup (xfree
, found_pathname
);
310 error (_("`%s': not in executable format: %s"),
311 found_pathname
, bfd_errmsg (bfd_get_error ()));
322 solib_map_sections -- open bfd and build sections for shared lib
326 static int solib_map_sections (struct so_list *so)
330 Given a pointer to one of the shared objects in our list
331 of mapped objects, use the recorded name to open a bfd
332 descriptor for the object, build a section table, and then
333 relocate all the section addresses by the base address at
334 which the shared object was mapped.
338 In most (all?) cases the shared object file name recorded in the
339 dynamic linkage tables will be a fully qualified pathname. For
340 cases where it isn't, do we really mimic the systems search
341 mechanism correctly in the below code (particularly the tilde
346 solib_map_sections (void *arg
)
348 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errors bogon */
350 struct target_section
*p
;
351 struct cleanup
*old_chain
;
354 filename
= tilde_expand (so
->so_name
);
355 old_chain
= make_cleanup (xfree
, filename
);
356 abfd
= solib_bfd_open (filename
);
357 do_cleanups (old_chain
);
359 /* Leave bfd open, core_xfer_memory and "info files" need it. */
362 /* copy full path name into so_name, so that later symbol_file_add
364 if (strlen (bfd_get_filename (abfd
)) >= SO_NAME_MAX_PATH_SIZE
)
365 error (_("Shared library file name is too long."));
366 strcpy (so
->so_name
, bfd_get_filename (abfd
));
368 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
370 error (_("Can't find the file sections in `%s': %s"),
371 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
374 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
376 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
378 /* Relocate the section binding addresses as recorded in the shared
379 object's file by the base address to which the object was actually
381 ops
->relocate_section_addresses (so
, p
);
383 /* If the target didn't provide information about the address
384 range of the shared object, assume we want the location of
385 the .text section. */
386 if (so
->addr_low
== 0 && so
->addr_high
== 0
387 && strcmp (p
->the_bfd_section
->name
, ".text") == 0)
389 so
->addr_low
= p
->addr
;
390 so
->addr_high
= p
->endaddr
;
399 free_so --- free a `struct so_list' object
403 void free_so (struct so_list *so)
407 Free the storage associated with the `struct so_list' object SO.
408 If we have opened a BFD for SO, close it.
410 The caller is responsible for removing SO from whatever list it is
411 a member of. If we have placed SO's sections in some target's
412 section table, the caller is responsible for removing them.
414 This function doesn't mess with objfiles at all. If there is an
415 objfile associated with SO that needs to be removed, the caller is
416 responsible for taking care of that. */
419 free_so (struct so_list
*so
)
421 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
422 char *bfd_filename
= 0;
425 xfree (so
->sections
);
429 bfd_filename
= bfd_get_filename (so
->abfd
);
430 if (! bfd_close (so
->abfd
))
431 warning (_("cannot close \"%s\": %s"),
432 bfd_filename
, bfd_errmsg (bfd_get_error ()));
436 xfree (bfd_filename
);
444 /* Return address of first so_list entry in master shared object list. */
446 master_so_list (void)
452 /* A small stub to get us past the arg-passing pinhole of catch_errors. */
455 symbol_add_stub (void *arg
)
457 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errs bogon */
458 struct section_addr_info
*sap
;
460 /* Have we already loaded this shared object? */
461 ALL_OBJFILES (so
->objfile
)
463 if (strcmp (so
->objfile
->name
, so
->so_name
) == 0)
467 sap
= build_section_addr_info_from_section_table (so
->sections
,
470 so
->objfile
= symbol_file_add_from_bfd (so
->abfd
, so
->from_tty
,
471 sap
, 0, OBJF_SHARED
| OBJF_KEEPBFD
);
472 free_section_addr_info (sap
);
477 /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be
478 chatty about it. Return non-zero if any symbols were actually
482 solib_read_symbols (struct so_list
*so
, int from_tty
)
484 if (so
->symbols_loaded
)
487 printf_unfiltered (_("Symbols already loaded for %s\n"), so
->so_name
);
489 else if (so
->abfd
== NULL
)
492 printf_unfiltered (_("Symbol file not found for %s\n"), so
->so_name
);
496 if (catch_errors (symbol_add_stub
, so
,
497 "Error while reading shared library symbols:\n",
500 if (from_tty
&& print_symbol_loading
)
501 printf_unfiltered (_("Loaded symbols for %s\n"), so
->so_name
);
502 so
->symbols_loaded
= 1;
512 update_solib_list --- synchronize GDB's shared object list with inferior's
516 void update_solib_list (int from_tty, struct target_ops *TARGET)
518 Extract the list of currently loaded shared objects from the
519 inferior, and compare it with the list of shared objects currently
520 in GDB's so_list_head list. Edit so_list_head to bring it in sync
521 with the inferior's new list.
523 If we notice that the inferior has unloaded some shared objects,
524 free any symbolic info GDB had read about those shared objects.
526 Don't load symbolic info for any new shared objects; just add them
527 to the list, and leave their symbols_loaded flag clear.
529 If FROM_TTY is non-null, feel free to print messages about what
532 If TARGET is non-null, add the sections of all new shared objects
533 to TARGET's section table. Note that this doesn't remove any
534 sections for shared objects that have been unloaded, and it
535 doesn't check to see if the new shared objects are already present in
536 the section table. But we only use this for core files and
537 processes we've just attached to, so that's okay. */
540 update_solib_list (int from_tty
, struct target_ops
*target
)
542 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
543 struct so_list
*inferior
= ops
->current_sos();
544 struct so_list
*gdb
, **gdb_link
;
546 /* We can reach here due to changing solib-search-path or the
547 sysroot, before having any inferior. */
548 if (target_has_execution
&& !ptid_equal (inferior_ptid
, null_ptid
))
550 struct inferior
*inf
= current_inferior ();
552 /* If we are attaching to a running process for which we
553 have not opened a symbol file, we may be able to get its
555 if (inf
->attach_flag
&& symfile_objfile
== NULL
)
556 catch_errors (ops
->open_symbol_file_object
, &from_tty
,
557 "Error reading attached process's symbol file.\n",
561 /* GDB and the inferior's dynamic linker each maintain their own
562 list of currently loaded shared objects; we want to bring the
563 former in sync with the latter. Scan both lists, seeing which
564 shared objects appear where. There are three cases:
566 - A shared object appears on both lists. This means that GDB
567 knows about it already, and it's still loaded in the inferior.
568 Nothing needs to happen.
570 - A shared object appears only on GDB's list. This means that
571 the inferior has unloaded it. We should remove the shared
572 object from GDB's tables.
574 - A shared object appears only on the inferior's list. This
575 means that it's just been loaded. We should add it to GDB's
578 So we walk GDB's list, checking each entry to see if it appears
579 in the inferior's list too. If it does, no action is needed, and
580 we remove it from the inferior's list. If it doesn't, the
581 inferior has unloaded it, and we remove it from GDB's list. By
582 the time we're done walking GDB's list, the inferior's list
583 contains only the new shared objects, which we then add. */
586 gdb_link
= &so_list_head
;
589 struct so_list
*i
= inferior
;
590 struct so_list
**i_link
= &inferior
;
592 /* Check to see whether the shared object *gdb also appears in
593 the inferior's current list. */
598 if (ops
->same (gdb
, i
))
603 if (! strcmp (gdb
->so_original_name
, i
->so_original_name
))
611 /* If the shared object appears on the inferior's list too, then
612 it's still loaded, so we don't need to do anything. Delete
613 it from the inferior's list, and leave it on GDB's list. */
618 gdb_link
= &gdb
->next
;
622 /* If it's not on the inferior's list, remove it from GDB's tables. */
625 /* Notify any observer that the shared object has been
626 unloaded before we remove it from GDB's tables. */
627 observer_notify_solib_unloaded (gdb
);
629 *gdb_link
= gdb
->next
;
631 /* Unless the user loaded it explicitly, free SO's objfile. */
632 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
))
633 free_objfile (gdb
->objfile
);
635 /* Some targets' section tables might be referring to
636 sections from so->abfd; remove them. */
637 remove_target_sections (gdb
->abfd
);
644 /* Now the inferior's list contains only shared objects that don't
645 appear in GDB's list --- those that are newly loaded. Add them
646 to GDB's shared object list. */
651 /* Add the new shared objects to GDB's list. */
652 *gdb_link
= inferior
;
654 /* Fill in the rest of each of the `struct so_list' nodes. */
655 for (i
= inferior
; i
; i
= i
->next
)
657 i
->from_tty
= from_tty
;
659 /* Fill in the rest of the `struct so_list' node. */
660 catch_errors (solib_map_sections
, i
,
661 "Error while mapping shared library sections:\n",
664 /* If requested, add the shared object's sections to the TARGET's
665 section table. Do this immediately after mapping the object so
666 that later nodes in the list can query this object, as is needed
670 int count
= (i
->sections_end
- i
->sections
);
673 int space
= target_resize_to_sections (target
, count
);
674 memcpy (target
->to_sections
+ space
,
676 count
* sizeof (i
->sections
[0]));
680 /* Notify any observer that the shared object has been
681 loaded now that we've added it to GDB's tables. */
682 observer_notify_solib_loaded (i
);
688 /* Return non-zero if NAME is the libpthread shared library.
690 Uses a fairly simplistic heuristic approach where we check
691 the file name against "/libpthread". This can lead to false
692 positives, but this should be good enough in practice. */
695 libpthread_name_p (const char *name
)
697 return (strstr (name
, "/libpthread") != NULL
);
700 /* Return non-zero if SO is the libpthread shared library. */
703 libpthread_solib_p (struct so_list
*so
)
705 return libpthread_name_p (so
->so_name
);
710 solib_add -- read in symbol info for newly added shared libraries
714 void solib_add (char *pattern, int from_tty, struct target_ops
715 *TARGET, int readsyms)
719 Read in symbolic information for any shared objects whose names
720 match PATTERN. (If we've already read a shared object's symbol
721 info, leave it alone.) If PATTERN is zero, read them all.
723 If READSYMS is 0, defer reading symbolic information until later
724 but still do any needed low level processing.
726 FROM_TTY and TARGET are as described for update_solib_list, above. */
729 solib_add (char *pattern
, int from_tty
, struct target_ops
*target
, int readsyms
)
735 char *re_err
= re_comp (pattern
);
738 error (_("Invalid regexp: %s"), re_err
);
741 update_solib_list (from_tty
, target
);
743 /* Walk the list of currently loaded shared libraries, and read
744 symbols for any that match the pattern --- or any whose symbols
745 aren't already loaded, if no pattern was given. */
748 int loaded_any_symbols
= 0;
750 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
751 if (! pattern
|| re_exec (gdb
->so_name
))
753 /* Normally, we would read the symbols from that library
754 only if READSYMS is set. However, we're making a small
755 exception for the pthread library, because we sometimes
756 need the library symbols to be loaded in order to provide
757 thread support (x86-linux for instance). */
758 const int add_this_solib
=
759 (readsyms
|| libpthread_solib_p (gdb
));
762 if (add_this_solib
&& solib_read_symbols (gdb
, from_tty
))
763 loaded_any_symbols
= 1;
766 if (from_tty
&& pattern
&& ! any_matches
)
768 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
770 if (loaded_any_symbols
)
772 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
774 /* Getting new symbols may change our opinion about what is
776 reinit_frame_cache ();
778 ops
->special_symbol_handling ();
788 info_sharedlibrary_command -- code for "info sharedlibrary"
792 static void info_sharedlibrary_command ()
796 Walk through the shared library list and print information
797 about each attached library.
801 info_sharedlibrary_command (char *ignore
, int from_tty
)
803 struct so_list
*so
= NULL
; /* link map state variable */
807 /* "0x", a little whitespace, and two hex digits per byte of pointers. */
808 addr_width
= 4 + (gdbarch_ptr_bit (target_gdbarch
) / 4);
810 update_solib_list (from_tty
, 0);
812 for (so
= so_list_head
; so
; so
= so
->next
)
818 printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width
, "From",
819 addr_width
, "To", "Syms Read",
820 "Shared Object Library");
824 printf_unfiltered ("%-*s", addr_width
,
826 ? hex_string_custom (
827 (LONGEST
) so
->addr_low
,
830 printf_unfiltered ("%-*s", addr_width
,
832 ? hex_string_custom (
833 (LONGEST
) so
->addr_high
,
836 printf_unfiltered ("%-12s", so
->symbols_loaded
? "Yes" : "No");
837 printf_unfiltered ("%s\n", so
->so_name
);
840 if (so_list_head
== NULL
)
842 printf_unfiltered (_("No shared libraries loaded at this time.\n"));
846 /* Return 1 if ADDRESS lies within SOLIB. */
849 solib_contains_address_p (const struct so_list
*const solib
,
852 struct target_section
*p
;
854 for (p
= solib
->sections
; p
< solib
->sections_end
; p
++)
855 if (p
->addr
<= address
&& address
< p
->endaddr
)
865 solib_name_from_address -- if an address is in a shared lib, return
870 char * solib_name_from_address (CORE_ADDR address)
874 Provides a hook for other gdb routines to discover whether or
875 not a particular address is within the mapped address space of
878 For example, this routine is called at one point to disable
879 breakpoints which are in shared libraries that are not currently
884 solib_name_from_address (CORE_ADDR address
)
886 struct so_list
*so
= 0; /* link map state variable */
888 for (so
= so_list_head
; so
; so
= so
->next
)
889 if (solib_contains_address_p (so
, address
))
890 return (so
->so_name
);
895 /* Called by free_all_symtabs */
900 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
902 /* This function is expected to handle ELF shared libraries. It is
903 also used on Solaris, which can run either ELF or a.out binaries
904 (for compatibility with SunOS 4), both of which can use shared
905 libraries. So we don't know whether we have an ELF executable or
906 an a.out executable until the user chooses an executable file.
908 ELF shared libraries don't get mapped into the address space
909 until after the program starts, so we'd better not try to insert
910 breakpoints in them immediately. We have to wait until the
911 dynamic linker has loaded them; we'll hit a bp_shlib_event
912 breakpoint (look for calls to create_solib_event_breakpoint) when
915 SunOS shared libraries seem to be different --- they're present
916 as soon as the process begins execution, so there's no need to
917 put off inserting breakpoints. There's also nowhere to put a
918 bp_shlib_event breakpoint, so if we put it off, we'll never get
921 So: disable breakpoints only if we're using ELF shared libs. */
923 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
924 disable_breakpoints_in_shlibs ();
928 struct so_list
*so
= so_list_head
;
929 so_list_head
= so
->next
;
930 observer_notify_solib_unloaded (so
);
932 remove_target_sections (so
->abfd
);
941 solib_create_inferior_hook -- shared library startup support
945 void solib_create_inferior_hook ()
949 When gdb starts up the inferior, it nurses it along (through the
950 shell) until it is ready to execute it's first instruction. At this
951 point, this function gets called via expansion of the macro
952 SOLIB_CREATE_INFERIOR_HOOK. */
955 solib_create_inferior_hook (void)
957 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
958 ops
->solib_create_inferior_hook();
963 in_solib_dynsym_resolve_code -- check to see if an address is in
964 dynamic loader's dynamic symbol
969 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
973 Determine if PC is in the dynamic linker's symbol resolution
974 code. Return 1 if so, 0 otherwise.
978 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
980 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
981 return ops
->in_dynsym_resolve_code (pc
);
988 sharedlibrary_command -- handle command to explicitly add library
992 static void sharedlibrary_command (char *args, int from_tty)
999 sharedlibrary_command (char *args
, int from_tty
)
1002 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
1007 no_shared_libraries -- handle command to explicitly discard symbols
1008 from shared libraries.
1012 Implements the command "nosharedlibrary", which discards symbols
1013 that have been auto-loaded from shared libraries. Symbols from
1014 shared libraries that were added by explicit request of the user
1015 are not discarded. Also called from remote.c. */
1018 no_shared_libraries (char *ignored
, int from_tty
)
1020 /* The order of the two routines below is important: clear_solib notifies
1021 the solib_unloaded observers, and some of these observers might need
1022 access to their associated objfiles. Therefore, we can not purge the
1023 solibs' objfiles before clear_solib has been called. */
1026 objfile_purge_solibs ();
1030 reload_shared_libraries (char *ignored
, int from_tty
,
1031 struct cmd_list_element
*e
)
1033 no_shared_libraries (NULL
, from_tty
);
1034 solib_add (NULL
, from_tty
, NULL
, auto_solib_add
);
1035 /* Creating inferior hooks here has two purposes. First, if we reload
1036 shared libraries then the address of solib breakpoint we've computed
1037 previously might be no longer valid. For example, if we forgot to set
1038 solib-absolute-prefix and are setting it right now, then the previous
1039 breakpoint address is plain wrong. Second, installing solib hooks
1040 also implicitly figures were ld.so is and loads symbols for it.
1041 Absent this call, if we've just connected to a target and set
1042 solib-absolute-prefix or solib-search-path, we'll lose all information
1044 if (target_has_execution
)
1046 #ifdef SOLIB_CREATE_INFERIOR_HOOK
1047 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
1049 solib_create_inferior_hook ();
1052 /* We have unloaded and then reloaded debug info for all shared libraries.
1053 However, frames may still reference them, for example a frame's
1054 unwinder might still point of DWARF FDE structures that are now freed.
1055 Reinit frame cache to avoid crashing. */
1056 reinit_frame_cache ();
1060 show_auto_solib_add (struct ui_file
*file
, int from_tty
,
1061 struct cmd_list_element
*c
, const char *value
)
1063 fprintf_filtered (file
, _("Autoloading of shared library symbols is %s.\n"),
1068 /* Handler for library-specific lookup of global symbol NAME in OBJFILE. Call
1069 the library-specific handler if it is installed for the current target. */
1072 solib_global_lookup (const struct objfile
*objfile
,
1074 const char *linkage_name
,
1075 const domain_enum domain
)
1077 struct target_so_ops
*ops
= solib_ops (target_gdbarch
);
1079 if (ops
->lookup_lib_global_symbol
!= NULL
)
1080 return ops
->lookup_lib_global_symbol (objfile
, name
, linkage_name
, domain
);
1085 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
1088 _initialize_solib (void)
1090 struct cmd_list_element
*c
;
1092 solib_data
= gdbarch_data_register_pre_init (solib_init
);
1094 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1095 _("Load shared object library symbols for files matching REGEXP."));
1096 add_info ("sharedlibrary", info_sharedlibrary_command
,
1097 _("Status of loaded shared object libraries."));
1098 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
1099 _("Unload all shared object library symbols."));
1101 add_setshow_boolean_cmd ("auto-solib-add", class_support
,
1102 &auto_solib_add
, _("\
1103 Set autoloading of shared library symbols."), _("\
1104 Show autoloading of shared library symbols."), _("\
1105 If \"on\", symbols from all shared object libraries will be loaded\n\
1106 automatically when the inferior begins execution, when the dynamic linker\n\
1107 informs gdb that a new library has been loaded, or when attaching to the\n\
1108 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."),
1110 show_auto_solib_add
,
1111 &setlist
, &showlist
);
1113 add_setshow_filename_cmd ("sysroot", class_support
,
1115 Set an alternate system root."), _("\
1116 Show the current system root."), _("\
1117 The system root is used to load absolute shared library symbol files.\n\
1118 For other (relative) files, you can add directories using\n\
1119 `set solib-search-path'."),
1120 reload_shared_libraries
,
1122 &setlist
, &showlist
);
1124 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1126 add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support
, 0,
1129 add_setshow_optional_filename_cmd ("solib-search-path", class_support
,
1130 &solib_search_path
, _("\
1131 Set the search path for loading non-absolute shared library symbol files."), _("\
1132 Show the search path for loading non-absolute shared library symbol files."), _("\
1133 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH."),
1134 reload_shared_libraries
,
1135 show_solib_search_path
,
1136 &setlist
, &showlist
);