| /* Handle shared libraries for GDB, the GNU Debugger. |
| |
| Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
| 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include "gdb_string.h" |
| #include "symtab.h" |
| #include "bfd.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "gdbcore.h" |
| #include "command.h" |
| #include "target.h" |
| #include "frame.h" |
| #include "gdb_regex.h" |
| #include "inferior.h" |
| #include "environ.h" |
| #include "language.h" |
| #include "gdbcmd.h" |
| #include "completer.h" |
| #include "filenames.h" /* for DOSish file names */ |
| |
| #include "solist.h" |
| #include <readline/readline.h> |
| |
| /* external data declarations */ |
| |
| /* FIXME: gdbarch needs to control this variable */ |
| struct target_so_ops *current_target_so_ops; |
| |
| /* local data declarations */ |
| |
| static struct so_list *so_list_head; /* List of known shared objects */ |
| |
| static int solib_cleanup_queued = 0; /* make_run_cleanup called */ |
| |
| /* Local function prototypes */ |
| |
| static void do_clear_solib (void *); |
| |
| /* If non-zero, this is a prefix that will be added to the front of the name |
| shared libraries with an absolute filename for loading. */ |
| static char *solib_absolute_prefix = NULL; |
| |
| /* If non-empty, this is a search path for loading non-absolute shared library |
| symbol files. This takes precedence over the environment variables PATH |
| and LD_LIBRARY_PATH. */ |
| static char *solib_search_path = NULL; |
| |
| /* |
| |
| GLOBAL FUNCTION |
| |
| solib_open -- Find a shared library file and open it. |
| |
| SYNOPSIS |
| |
| int solib_open (char *in_patname, char **found_pathname); |
| |
| DESCRIPTION |
| |
| Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory |
| to search for shared libraries if they have an absolute path. |
| |
| Global variable SOLIB_SEARCH_PATH is used as a prefix directory |
| (or set of directories, as in LD_LIBRARY_PATH) to search for all |
| shared libraries if not found in SOLIB_ABSOLUTE_PREFIX. |
| |
| Search order: |
| * If path is absolute, look in SOLIB_ABSOLUTE_PREFIX. |
| * If path is absolute or relative, look for it literally (unmodified). |
| * Look in SOLIB_SEARCH_PATH. |
| * Look in inferior's $PATH. |
| * Look in inferior's $LD_LIBRARY_PATH. |
| |
| RETURNS |
| |
| file handle for opened solib, or -1 for failure. */ |
| |
| int |
| solib_open (char *in_pathname, char **found_pathname) |
| { |
| int found_file = -1; |
| char *temp_pathname = NULL; |
| char *p = in_pathname; |
| |
| while (*p && !IS_DIR_SEPARATOR (*p)) |
| p++; |
| |
| if (*p) |
| { |
| if (! IS_ABSOLUTE_PATH (in_pathname) || solib_absolute_prefix == NULL) |
| temp_pathname = in_pathname; |
| else |
| { |
| int prefix_len = strlen (solib_absolute_prefix); |
| |
| /* Remove trailing slashes from absolute prefix. */ |
| while (prefix_len > 0 |
| && IS_DIR_SEPARATOR (solib_absolute_prefix[prefix_len - 1])) |
| prefix_len--; |
| |
| /* Cat the prefixed pathname together. */ |
| temp_pathname = alloca (prefix_len + strlen (in_pathname) + 1); |
| strncpy (temp_pathname, solib_absolute_prefix, prefix_len); |
| temp_pathname[prefix_len] = '\0'; |
| strcat (temp_pathname, in_pathname); |
| } |
| |
| /* Now see if we can open it. */ |
| found_file = open (temp_pathname, O_RDONLY, 0); |
| } |
| |
| /* If the search in solib_absolute_prefix failed, and the path name is |
| absolute at this point, make it relative. (openp will try and open the |
| file according to its absolute path otherwise, which is not what we want.) |
| Affects subsequent searches for this solib. */ |
| if (found_file < 0 && IS_ABSOLUTE_PATH (in_pathname)) |
| { |
| /* First, get rid of any drive letters etc. */ |
| while (!IS_DIR_SEPARATOR (*in_pathname)) |
| in_pathname++; |
| |
| /* Next, get rid of all leading dir separators. */ |
| while (IS_DIR_SEPARATOR (*in_pathname)) |
| in_pathname++; |
| } |
| |
| /* If not found, next search the solib_search_path (if any). */ |
| if (found_file < 0 && solib_search_path != NULL) |
| found_file = openp (solib_search_path, |
| 1, in_pathname, O_RDONLY, 0, &temp_pathname); |
| |
| /* If not found, next search the solib_search_path (if any) for the basename |
| only (ignoring the path). This is to allow reading solibs from a path |
| that differs from the opened path. */ |
| if (found_file < 0 && solib_search_path != NULL) |
| found_file = openp (solib_search_path, |
| 1, lbasename (in_pathname), O_RDONLY, 0, |
| &temp_pathname); |
| |
| /* If not found, try to use target supplied solib search method */ |
| if (found_file < 0 && TARGET_SO_FIND_AND_OPEN_SOLIB != NULL) |
| found_file = TARGET_SO_FIND_AND_OPEN_SOLIB |
| (in_pathname, O_RDONLY, &temp_pathname); |
| |
| /* If not found, next search the inferior's $PATH environment variable. */ |
| if (found_file < 0 && solib_search_path != NULL) |
| found_file = openp (get_in_environ (inferior_environ, "PATH"), |
| 1, in_pathname, O_RDONLY, 0, &temp_pathname); |
| |
| /* If not found, next search the inferior's $LD_LIBRARY_PATH |
| environment variable. */ |
| if (found_file < 0 && solib_search_path != NULL) |
| found_file = openp (get_in_environ (inferior_environ, "LD_LIBRARY_PATH"), |
| 1, in_pathname, O_RDONLY, 0, &temp_pathname); |
| |
| /* Done. If not found, tough luck. Return found_file and |
| (optionally) found_pathname. */ |
| if (found_pathname != NULL && temp_pathname != NULL) |
| *found_pathname = xstrdup (temp_pathname); |
| return found_file; |
| } |
| |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| solib_map_sections -- open bfd and build sections for shared lib |
| |
| SYNOPSIS |
| |
| static int solib_map_sections (struct so_list *so) |
| |
| DESCRIPTION |
| |
| Given a pointer to one of the shared objects in our list |
| of mapped objects, use the recorded name to open a bfd |
| descriptor for the object, build a section table, and then |
| relocate all the section addresses by the base address at |
| which the shared object was mapped. |
| |
| FIXMES |
| |
| In most (all?) cases the shared object file name recorded in the |
| dynamic linkage tables will be a fully qualified pathname. For |
| cases where it isn't, do we really mimic the systems search |
| mechanism correctly in the below code (particularly the tilde |
| expansion stuff?). |
| */ |
| |
| static int |
| solib_map_sections (void *arg) |
| { |
| struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ |
| char *filename; |
| char *scratch_pathname; |
| int scratch_chan; |
| struct section_table *p; |
| struct cleanup *old_chain; |
| bfd *abfd; |
| |
| filename = tilde_expand (so->so_name); |
| |
| old_chain = make_cleanup (xfree, filename); |
| scratch_chan = solib_open (filename, &scratch_pathname); |
| |
| if (scratch_chan < 0) |
| { |
| perror_with_name (filename); |
| } |
| |
| /* Leave scratch_pathname allocated. abfd->name will point to it. */ |
| abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); |
| if (!abfd) |
| { |
| close (scratch_chan); |
| error ("Could not open `%s' as an executable file: %s", |
| scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| } |
| |
| /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
| so->abfd = abfd; |
| abfd->cacheable = 1; |
| |
| /* copy full path name into so_name, so that later symbol_file_add |
| can find it */ |
| if (strlen (scratch_pathname) >= SO_NAME_MAX_PATH_SIZE) |
| error ("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure."); |
| strcpy (so->so_name, scratch_pathname); |
| |
| if (!bfd_check_format (abfd, bfd_object)) |
| { |
| error ("\"%s\": not in executable format: %s.", |
| scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| } |
| if (build_section_table (abfd, &so->sections, &so->sections_end)) |
| { |
| error ("Can't find the file sections in `%s': %s", |
| bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| } |
| |
| for (p = so->sections; p < so->sections_end; p++) |
| { |
| /* Relocate the section binding addresses as recorded in the shared |
| object's file by the base address to which the object was actually |
| mapped. */ |
| TARGET_SO_RELOCATE_SECTION_ADDRESSES (so, p); |
| if (STREQ (p->the_bfd_section->name, ".text")) |
| { |
| so->textsection = p; |
| } |
| } |
| |
| /* Free the file names, close the file now. */ |
| do_cleanups (old_chain); |
| |
| return (1); |
| } |
| |
| /* LOCAL FUNCTION |
| |
| free_so --- free a `struct so_list' object |
| |
| SYNOPSIS |
| |
| void free_so (struct so_list *so) |
| |
| DESCRIPTION |
| |
| Free the storage associated with the `struct so_list' object SO. |
| If we have opened a BFD for SO, close it. |
| |
| The caller is responsible for removing SO from whatever list it is |
| a member of. If we have placed SO's sections in some target's |
| section table, the caller is responsible for removing them. |
| |
| This function doesn't mess with objfiles at all. If there is an |
| objfile associated with SO that needs to be removed, the caller is |
| responsible for taking care of that. */ |
| |
| void |
| free_so (struct so_list *so) |
| { |
| char *bfd_filename = 0; |
| |
| if (so->sections) |
| xfree (so->sections); |
| |
| if (so->abfd) |
| { |
| bfd_filename = bfd_get_filename (so->abfd); |
| if (! bfd_close (so->abfd)) |
| warning ("cannot close \"%s\": %s", |
| bfd_filename, bfd_errmsg (bfd_get_error ())); |
| } |
| |
| if (bfd_filename) |
| xfree (bfd_filename); |
| |
| TARGET_SO_FREE_SO (so); |
| |
| xfree (so); |
| } |
| |
| |
| /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
| |
| static int |
| symbol_add_stub (void *arg) |
| { |
| register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
| struct section_addr_info *sap; |
| |
| /* Have we already loaded this shared object? */ |
| ALL_OBJFILES (so->objfile) |
| { |
| if (strcmp (so->objfile->name, so->so_name) == 0) |
| return 1; |
| } |
| |
| sap = build_section_addr_info_from_section_table (so->sections, |
| so->sections_end); |
| |
| so->objfile = symbol_file_add (so->so_name, so->from_tty, |
| sap, 0, OBJF_SHARED); |
| free_section_addr_info (sap); |
| |
| return (1); |
| } |
| |
| |
| /* LOCAL FUNCTION |
| |
| update_solib_list --- synchronize GDB's shared object list with inferior's |
| |
| SYNOPSIS |
| |
| void update_solib_list (int from_tty, struct target_ops *TARGET) |
| |
| Extract the list of currently loaded shared objects from the |
| inferior, and compare it with the list of shared objects currently |
| in GDB's so_list_head list. Edit so_list_head to bring it in sync |
| with the inferior's new list. |
| |
| If we notice that the inferior has unloaded some shared objects, |
| free any symbolic info GDB had read about those shared objects. |
| |
| Don't load symbolic info for any new shared objects; just add them |
| to the list, and leave their symbols_loaded flag clear. |
| |
| If FROM_TTY is non-null, feel free to print messages about what |
| we're doing. |
| |
| If TARGET is non-null, add the sections of all new shared objects |
| to TARGET's section table. Note that this doesn't remove any |
| sections for shared objects that have been unloaded, and it |
| doesn't check to see if the new shared objects are already present in |
| the section table. But we only use this for core files and |
| processes we've just attached to, so that's okay. */ |
| |
| void |
| update_solib_list (int from_tty, struct target_ops *target) |
| { |
| struct so_list *inferior = TARGET_SO_CURRENT_SOS (); |
| struct so_list *gdb, **gdb_link; |
| |
| /* If we are attaching to a running process for which we |
| have not opened a symbol file, we may be able to get its |
| symbols now! */ |
| if (attach_flag && |
| symfile_objfile == NULL) |
| catch_errors (TARGET_SO_OPEN_SYMBOL_FILE_OBJECT, &from_tty, |
| "Error reading attached process's symbol file.\n", |
| RETURN_MASK_ALL); |
| |
| /* Since this function might actually add some elements to the |
| so_list_head list, arrange for it to be cleaned up when |
| appropriate. */ |
| if (!solib_cleanup_queued) |
| { |
| make_run_cleanup (do_clear_solib, NULL); |
| solib_cleanup_queued = 1; |
| } |
| |
| /* GDB and the inferior's dynamic linker each maintain their own |
| list of currently loaded shared objects; we want to bring the |
| former in sync with the latter. Scan both lists, seeing which |
| shared objects appear where. There are three cases: |
| |
| - A shared object appears on both lists. This means that GDB |
| knows about it already, and it's still loaded in the inferior. |
| Nothing needs to happen. |
| |
| - A shared object appears only on GDB's list. This means that |
| the inferior has unloaded it. We should remove the shared |
| object from GDB's tables. |
| |
| - A shared object appears only on the inferior's list. This |
| means that it's just been loaded. We should add it to GDB's |
| tables. |
| |
| So we walk GDB's list, checking each entry to see if it appears |
| in the inferior's list too. If it does, no action is needed, and |
| we remove it from the inferior's list. If it doesn't, the |
| inferior has unloaded it, and we remove it from GDB's list. By |
| the time we're done walking GDB's list, the inferior's list |
| contains only the new shared objects, which we then add. */ |
| |
| gdb = so_list_head; |
| gdb_link = &so_list_head; |
| while (gdb) |
| { |
| struct so_list *i = inferior; |
| struct so_list **i_link = &inferior; |
| |
| /* Check to see whether the shared object *gdb also appears in |
| the inferior's current list. */ |
| while (i) |
| { |
| if (! strcmp (gdb->so_original_name, i->so_original_name)) |
| break; |
| |
| i_link = &i->next; |
| i = *i_link; |
| } |
| |
| /* If the shared object appears on the inferior's list too, then |
| it's still loaded, so we don't need to do anything. Delete |
| it from the inferior's list, and leave it on GDB's list. */ |
| if (i) |
| { |
| *i_link = i->next; |
| free_so (i); |
| gdb_link = &gdb->next; |
| gdb = *gdb_link; |
| } |
| |
| /* If it's not on the inferior's list, remove it from GDB's tables. */ |
| else |
| { |
| *gdb_link = gdb->next; |
| |
| /* Unless the user loaded it explicitly, free SO's objfile. */ |
| if (gdb->objfile && ! (gdb->objfile->flags & OBJF_USERLOADED)) |
| free_objfile (gdb->objfile); |
| |
| /* Some targets' section tables might be referring to |
| sections from so->abfd; remove them. */ |
| remove_target_sections (gdb->abfd); |
| |
| free_so (gdb); |
| gdb = *gdb_link; |
| } |
| } |
| |
| /* Now the inferior's list contains only shared objects that don't |
| appear in GDB's list --- those that are newly loaded. Add them |
| to GDB's shared object list. */ |
| if (inferior) |
| { |
| struct so_list *i; |
| |
| /* Add the new shared objects to GDB's list. */ |
| *gdb_link = inferior; |
| |
| /* Fill in the rest of each of the `struct so_list' nodes. */ |
| for (i = inferior; i; i = i->next) |
| { |
| i->from_tty = from_tty; |
| |
| /* Fill in the rest of the `struct so_list' node. */ |
| catch_errors (solib_map_sections, i, |
| "Error while mapping shared library sections:\n", |
| RETURN_MASK_ALL); |
| |
| /* If requested, add the shared object's sections to the TARGET's |
| section table. Do this immediately after mapping the object so |
| that later nodes in the list can query this object, as is needed |
| in solib-osf.c. */ |
| if (target) |
| { |
| int count = (i->sections_end - i->sections); |
| if (count > 0) |
| { |
| int space = target_resize_to_sections (target, count); |
| memcpy (target->to_sections + space, |
| i->sections, |
| count * sizeof (i->sections[0])); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| /* GLOBAL FUNCTION |
| |
| solib_add -- read in symbol info for newly added shared libraries |
| |
| SYNOPSIS |
| |
| void solib_add (char *pattern, int from_tty, struct target_ops |
| *TARGET, int readsyms) |
| |
| DESCRIPTION |
| |
| Read in symbolic information for any shared objects whose names |
| match PATTERN. (If we've already read a shared object's symbol |
| info, leave it alone.) If PATTERN is zero, read them all. |
| |
| If READSYMS is 0, defer reading symbolic information until later |
| but still do any needed low level processing. |
| |
| FROM_TTY and TARGET are as described for update_solib_list, above. */ |
| |
| void |
| solib_add (char *pattern, int from_tty, struct target_ops *target, int readsyms) |
| { |
| struct so_list *gdb; |
| |
| if (pattern) |
| { |
| char *re_err = re_comp (pattern); |
| |
| if (re_err) |
| error ("Invalid regexp: %s", re_err); |
| } |
| |
| update_solib_list (from_tty, target); |
| |
| /* Walk the list of currently loaded shared libraries, and read |
| symbols for any that match the pattern --- or any whose symbols |
| aren't already loaded, if no pattern was given. */ |
| { |
| int any_matches = 0; |
| int loaded_any_symbols = 0; |
| |
| for (gdb = so_list_head; gdb; gdb = gdb->next) |
| if (! pattern || re_exec (gdb->so_name)) |
| { |
| any_matches = 1; |
| |
| if (gdb->symbols_loaded) |
| { |
| if (from_tty) |
| printf_unfiltered ("Symbols already loaded for %s\n", |
| gdb->so_name); |
| } |
| else if (readsyms) |
| { |
| if (catch_errors |
| (symbol_add_stub, gdb, |
| "Error while reading shared library symbols:\n", |
| RETURN_MASK_ALL)) |
| { |
| if (from_tty) |
| printf_unfiltered ("Loaded symbols for %s\n", |
| gdb->so_name); |
| gdb->symbols_loaded = 1; |
| loaded_any_symbols = 1; |
| } |
| } |
| } |
| |
| if (from_tty && pattern && ! any_matches) |
| printf_unfiltered |
| ("No loaded shared libraries match the pattern `%s'.\n", pattern); |
| |
| if (loaded_any_symbols) |
| { |
| /* Getting new symbols may change our opinion about what is |
| frameless. */ |
| reinit_frame_cache (); |
| |
| TARGET_SO_SPECIAL_SYMBOL_HANDLING (); |
| } |
| } |
| } |
| |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| info_sharedlibrary_command -- code for "info sharedlibrary" |
| |
| SYNOPSIS |
| |
| static void info_sharedlibrary_command () |
| |
| DESCRIPTION |
| |
| Walk through the shared library list and print information |
| about each attached library. |
| */ |
| |
| static void |
| info_sharedlibrary_command (char *ignore, int from_tty) |
| { |
| register struct so_list *so = NULL; /* link map state variable */ |
| int header_done = 0; |
| int addr_width; |
| char *addr_fmt; |
| |
| if (TARGET_PTR_BIT == 32) |
| { |
| addr_width = 8 + 4; |
| addr_fmt = "08l"; |
| } |
| else if (TARGET_PTR_BIT == 64) |
| { |
| addr_width = 16 + 4; |
| addr_fmt = "016l"; |
| } |
| else |
| { |
| internal_error (__FILE__, __LINE__, |
| "TARGET_PTR_BIT returned unknown size %d", |
| TARGET_PTR_BIT); |
| } |
| |
| update_solib_list (from_tty, 0); |
| |
| for (so = so_list_head; so; so = so->next) |
| { |
| if (so->so_name[0]) |
| { |
| if (!header_done) |
| { |
| printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width, "From", |
| addr_width, "To", "Syms Read", |
| "Shared Object Library"); |
| header_done++; |
| } |
| |
| printf_unfiltered ("%-*s", addr_width, |
| so->textsection != NULL |
| ? local_hex_string_custom ( |
| (LONGEST) so->textsection->addr, |
| addr_fmt) |
| : ""); |
| printf_unfiltered ("%-*s", addr_width, |
| so->textsection != NULL |
| ? local_hex_string_custom ( |
| (LONGEST) so->textsection->endaddr, |
| addr_fmt) |
| : ""); |
| printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); |
| printf_unfiltered ("%s\n", so->so_name); |
| } |
| } |
| if (so_list_head == NULL) |
| { |
| printf_unfiltered ("No shared libraries loaded at this time.\n"); |
| } |
| } |
| |
| /* |
| |
| GLOBAL FUNCTION |
| |
| solib_address -- check to see if an address is in a shared lib |
| |
| SYNOPSIS |
| |
| char * solib_address (CORE_ADDR address) |
| |
| DESCRIPTION |
| |
| Provides a hook for other gdb routines to discover whether or |
| not a particular address is within the mapped address space of |
| a shared library. |
| |
| For example, this routine is called at one point to disable |
| breakpoints which are in shared libraries that are not currently |
| mapped in. |
| */ |
| |
| char * |
| solib_address (CORE_ADDR address) |
| { |
| register struct so_list *so = 0; /* link map state variable */ |
| |
| for (so = so_list_head; so; so = so->next) |
| { |
| struct section_table *p; |
| |
| for (p = so->sections; p < so->sections_end; p++) |
| { |
| if (p->addr <= address && address < p->endaddr) |
| return (so->so_name); |
| } |
| } |
| |
| return (0); |
| } |
| |
| /* Called by free_all_symtabs */ |
| |
| void |
| clear_solib (void) |
| { |
| /* This function is expected to handle ELF shared libraries. It is |
| also used on Solaris, which can run either ELF or a.out binaries |
| (for compatibility with SunOS 4), both of which can use shared |
| libraries. So we don't know whether we have an ELF executable or |
| an a.out executable until the user chooses an executable file. |
| |
| ELF shared libraries don't get mapped into the address space |
| until after the program starts, so we'd better not try to insert |
| breakpoints in them immediately. We have to wait until the |
| dynamic linker has loaded them; we'll hit a bp_shlib_event |
| breakpoint (look for calls to create_solib_event_breakpoint) when |
| it's ready. |
| |
| SunOS shared libraries seem to be different --- they're present |
| as soon as the process begins execution, so there's no need to |
| put off inserting breakpoints. There's also nowhere to put a |
| bp_shlib_event breakpoint, so if we put it off, we'll never get |
| around to it. |
| |
| So: disable breakpoints only if we're using ELF shared libs. */ |
| if (exec_bfd != NULL |
| && bfd_get_flavour (exec_bfd) != bfd_target_aout_flavour) |
| disable_breakpoints_in_shlibs (1); |
| |
| while (so_list_head) |
| { |
| struct so_list *so = so_list_head; |
| so_list_head = so->next; |
| if (so->abfd) |
| remove_target_sections (so->abfd); |
| free_so (so); |
| } |
| |
| TARGET_SO_CLEAR_SOLIB (); |
| } |
| |
| static void |
| do_clear_solib (void *dummy) |
| { |
| solib_cleanup_queued = 0; |
| clear_solib (); |
| } |
| |
| /* GLOBAL FUNCTION |
| |
| solib_create_inferior_hook -- shared library startup support |
| |
| SYNOPSIS |
| |
| void solib_create_inferior_hook() |
| |
| DESCRIPTION |
| |
| When gdb starts up the inferior, it nurses it along (through the |
| shell) until it is ready to execute it's first instruction. At this |
| point, this function gets called via expansion of the macro |
| SOLIB_CREATE_INFERIOR_HOOK. */ |
| |
| void |
| solib_create_inferior_hook (void) |
| { |
| TARGET_SO_SOLIB_CREATE_INFERIOR_HOOK (); |
| } |
| |
| /* GLOBAL FUNCTION |
| |
| in_solib_dynsym_resolve_code -- check to see if an address is in |
| dynamic loader's dynamic symbol |
| resolution code |
| |
| SYNOPSIS |
| |
| int in_solib_dynsym_resolve_code (CORE_ADDR pc) |
| |
| DESCRIPTION |
| |
| Determine if PC is in the dynamic linker's symbol resolution |
| code. Return 1 if so, 0 otherwise. |
| */ |
| |
| int |
| in_solib_dynsym_resolve_code (CORE_ADDR pc) |
| { |
| return TARGET_SO_IN_DYNSYM_RESOLVE_CODE (pc); |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| sharedlibrary_command -- handle command to explicitly add library |
| |
| SYNOPSIS |
| |
| static void sharedlibrary_command (char *args, int from_tty) |
| |
| DESCRIPTION |
| |
| */ |
| |
| static void |
| sharedlibrary_command (char *args, int from_tty) |
| { |
| dont_repeat (); |
| solib_add (args, from_tty, (struct target_ops *) 0, 1); |
| } |
| |
| /* LOCAL FUNCTION |
| |
| no_shared_libraries -- handle command to explicitly discard symbols |
| from shared libraries. |
| |
| DESCRIPTION |
| |
| Implements the command "nosharedlibrary", which discards symbols |
| that have been auto-loaded from shared libraries. Symbols from |
| shared libraries that were added by explicit request of the user |
| are not discarded. Also called from remote.c. */ |
| |
| void |
| no_shared_libraries (char *ignored, int from_tty) |
| { |
| objfile_purge_solibs (); |
| do_clear_solib (NULL); |
| } |
| |
| static void |
| reload_shared_libraries (char *ignored, int from_tty) |
| { |
| no_shared_libraries (NULL, from_tty); |
| solib_add (NULL, from_tty, NULL, auto_solib_add); |
| } |
| |
| void |
| _initialize_solib (void) |
| { |
| struct cmd_list_element *c; |
| |
| add_com ("sharedlibrary", class_files, sharedlibrary_command, |
| "Load shared object library symbols for files matching REGEXP."); |
| add_info ("sharedlibrary", info_sharedlibrary_command, |
| "Status of loaded shared object libraries."); |
| add_com ("nosharedlibrary", class_files, no_shared_libraries, |
| "Unload all shared object library symbols."); |
| |
| add_show_from_set |
| (add_set_cmd ("auto-solib-add", class_support, var_boolean, |
| (char *) &auto_solib_add, |
| "Set autoloading of shared library symbols.\n\ |
| If \"on\", symbols from all shared object libraries will be loaded\n\ |
| automatically when the inferior begins execution, when the dynamic linker\n\ |
| informs gdb that a new library has been loaded, or when attaching to the\n\ |
| inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'.", |
| &setlist), |
| &showlist); |
| |
| c = add_set_cmd ("solib-absolute-prefix", class_support, var_filename, |
| (char *) &solib_absolute_prefix, |
| "Set prefix for loading absolute shared library symbol files.\n\ |
| For other (relative) files, you can add values using `set solib-search-path'.", |
| &setlist); |
| add_show_from_set (c, &showlist); |
| set_cmd_cfunc (c, reload_shared_libraries); |
| set_cmd_completer (c, filename_completer); |
| |
| /* Set the default value of "solib-absolute-prefix" from the sysroot, if |
| one is set. */ |
| solib_absolute_prefix = xstrdup (gdb_sysroot); |
| |
| c = add_set_cmd ("solib-search-path", class_support, var_string, |
| (char *) &solib_search_path, |
| "Set the search path for loading non-absolute shared library symbol files.\n\ |
| This takes precedence over the environment variables PATH and LD_LIBRARY_PATH.", |
| &setlist); |
| add_show_from_set (c, &showlist); |
| set_cmd_cfunc (c, reload_shared_libraries); |
| set_cmd_completer (c, filename_completer); |
| } |