| /* GDB routines for manipulating objfiles. |
| |
| Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
| |
| Contributed by Cygnus Support, using pieces from other GDB modules. |
| |
| 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., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| /* This file contains support routines for creating, manipulating, and |
| destroying objfile structures. */ |
| |
| #include "defs.h" |
| #include "bfd.h" /* Binary File Description */ |
| #include "symtab.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "gdb-stabs.h" |
| #include "target.h" |
| #include "bcache.h" |
| #include "mdebugread.h" |
| #include "expression.h" |
| #include "parser-defs.h" |
| |
| #include "gdb_assert.h" |
| #include <sys/types.h> |
| #include "gdb_stat.h" |
| #include <fcntl.h> |
| #include "gdb_obstack.h" |
| #include "gdb_string.h" |
| #include "hashtab.h" |
| |
| #include "breakpoint.h" |
| #include "block.h" |
| #include "dictionary.h" |
| #include "source.h" |
| |
| /* Prototypes for local functions */ |
| |
| static void objfile_alloc_data (struct objfile *objfile); |
| static void objfile_free_data (struct objfile *objfile); |
| |
| /* Externally visible variables that are owned by this module. |
| See declarations in objfile.h for more info. */ |
| |
| struct objfile *object_files; /* Linked list of all objfiles */ |
| struct objfile *current_objfile; /* For symbol file being read in */ |
| struct objfile *symfile_objfile; /* Main symbol table loaded from */ |
| struct objfile *rt_common_objfile; /* For runtime common symbols */ |
| |
| /* Locate all mappable sections of a BFD file. |
| objfile_p_char is a char * to get it through |
| bfd_map_over_sections; we cast it back to its proper type. */ |
| |
| #ifndef TARGET_KEEP_SECTION |
| #define TARGET_KEEP_SECTION(ASECT) 0 |
| #endif |
| |
| /* Called via bfd_map_over_sections to build up the section table that |
| the objfile references. The objfile contains pointers to the start |
| of the table (objfile->sections) and to the first location after |
| the end of the table (objfile->sections_end). */ |
| |
| static void |
| add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect, |
| void *objfile_p_char) |
| { |
| struct objfile *objfile = (struct objfile *) objfile_p_char; |
| struct obj_section section; |
| flagword aflag; |
| |
| aflag = bfd_get_section_flags (abfd, asect); |
| |
| if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION (asect))) |
| return; |
| |
| if (0 == bfd_section_size (abfd, asect)) |
| return; |
| section.offset = 0; |
| section.objfile = objfile; |
| section.the_bfd_section = asect; |
| section.ovly_mapped = 0; |
| section.addr = bfd_section_vma (abfd, asect); |
| section.endaddr = section.addr + bfd_section_size (abfd, asect); |
| obstack_grow (&objfile->objfile_obstack, (char *) §ion, sizeof (section)); |
| objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1); |
| } |
| |
| /* Builds a section table for OBJFILE. |
| Returns 0 if OK, 1 on error (in which case bfd_error contains the |
| error). |
| |
| Note that while we are building the table, which goes into the |
| psymbol obstack, we hijack the sections_end pointer to instead hold |
| a count of the number of sections. When bfd_map_over_sections |
| returns, this count is used to compute the pointer to the end of |
| the sections table, which then overwrites the count. |
| |
| Also note that the OFFSET and OVLY_MAPPED in each table entry |
| are initialized to zero. |
| |
| Also note that if anything else writes to the psymbol obstack while |
| we are building the table, we're pretty much hosed. */ |
| |
| int |
| build_objfile_section_table (struct objfile *objfile) |
| { |
| /* objfile->sections can be already set when reading a mapped symbol |
| file. I believe that we do need to rebuild the section table in |
| this case (we rebuild other things derived from the bfd), but we |
| can't free the old one (it's in the objfile_obstack). So we just |
| waste some memory. */ |
| |
| objfile->sections_end = 0; |
| bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile); |
| objfile->sections = (struct obj_section *) |
| obstack_finish (&objfile->objfile_obstack); |
| objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; |
| return (0); |
| } |
| |
| /* Given a pointer to an initialized bfd (ABFD) and some flag bits |
| allocate a new objfile struct, fill it in as best we can, link it |
| into the list of all known objfiles, and return a pointer to the |
| new objfile struct. |
| |
| The FLAGS word contains various bits (OBJF_*) that can be taken as |
| requests for specific operations. Other bits like OBJF_SHARED are |
| simply copied through to the new objfile flags member. */ |
| |
| /* NOTE: carlton/2003-02-04: This function is called with args NULL, 0 |
| by jv-lang.c, to create an artificial objfile used to hold |
| information about dynamically-loaded Java classes. Unfortunately, |
| that branch of this function doesn't get tested very frequently, so |
| it's prone to breakage. (E.g. at one time the name was set to NULL |
| in that situation, which broke a loop over all names in the dynamic |
| library loader.) If you change this function, please try to leave |
| things in a consistent state even if abfd is NULL. */ |
| |
| struct objfile * |
| allocate_objfile (bfd *abfd, int flags) |
| { |
| struct objfile *objfile = NULL; |
| struct objfile *last_one = NULL; |
| |
| /* If we don't support mapped symbol files, didn't ask for the file to be |
| mapped, or failed to open the mapped file for some reason, then revert |
| back to an unmapped objfile. */ |
| |
| if (objfile == NULL) |
| { |
| objfile = (struct objfile *) xmalloc (sizeof (struct objfile)); |
| memset (objfile, 0, sizeof (struct objfile)); |
| objfile->md = NULL; |
| objfile->psymbol_cache = bcache_xmalloc (); |
| objfile->macro_cache = bcache_xmalloc (); |
| /* We could use obstack_specify_allocation here instead, but |
| gdb_obstack.h specifies the alloc/dealloc functions. */ |
| obstack_init (&objfile->objfile_obstack); |
| terminate_minimal_symbol_table (objfile); |
| } |
| |
| objfile_alloc_data (objfile); |
| |
| /* Update the per-objfile information that comes from the bfd, ensuring |
| that any data that is reference is saved in the per-objfile data |
| region. */ |
| |
| objfile->obfd = abfd; |
| if (objfile->name != NULL) |
| { |
| xfree (objfile->name); |
| } |
| if (abfd != NULL) |
| { |
| objfile->name = xstrdup (bfd_get_filename (abfd)); |
| objfile->mtime = bfd_get_mtime (abfd); |
| |
| /* Build section table. */ |
| |
| if (build_objfile_section_table (objfile)) |
| { |
| error (_("Can't find the file sections in `%s': %s"), |
| objfile->name, bfd_errmsg (bfd_get_error ())); |
| } |
| } |
| else |
| { |
| objfile->name = xstrdup ("<<anonymous objfile>>"); |
| } |
| |
| /* Initialize the section indexes for this objfile, so that we can |
| later detect if they are used w/o being properly assigned to. */ |
| |
| objfile->sect_index_text = -1; |
| objfile->sect_index_data = -1; |
| objfile->sect_index_bss = -1; |
| objfile->sect_index_rodata = -1; |
| |
| /* We don't yet have a C++-specific namespace symtab. */ |
| |
| objfile->cp_namespace_symtab = NULL; |
| |
| /* Add this file onto the tail of the linked list of other such files. */ |
| |
| objfile->next = NULL; |
| if (object_files == NULL) |
| object_files = objfile; |
| else |
| { |
| for (last_one = object_files; |
| last_one->next; |
| last_one = last_one->next); |
| last_one->next = objfile; |
| } |
| |
| /* Save passed in flag bits. */ |
| objfile->flags |= flags; |
| |
| return (objfile); |
| } |
| |
| /* Initialize entry point information for this objfile. */ |
| |
| void |
| init_entry_point_info (struct objfile *objfile) |
| { |
| /* Save startup file's range of PC addresses to help blockframe.c |
| decide where the bottom of the stack is. */ |
| |
| if (bfd_get_file_flags (objfile->obfd) & EXEC_P) |
| { |
| /* Executable file -- record its entry point so we'll recognize |
| the startup file because it contains the entry point. */ |
| objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); |
| } |
| else |
| { |
| /* Examination of non-executable.o files. Short-circuit this stuff. */ |
| objfile->ei.entry_point = INVALID_ENTRY_POINT; |
| } |
| } |
| |
| /* Get current entry point address. */ |
| |
| CORE_ADDR |
| entry_point_address (void) |
| { |
| return symfile_objfile ? symfile_objfile->ei.entry_point : 0; |
| } |
| |
| /* Create the terminating entry of OBJFILE's minimal symbol table. |
| If OBJFILE->msymbols is zero, allocate a single entry from |
| OBJFILE->objfile_obstack; otherwise, just initialize |
| OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */ |
| void |
| terminate_minimal_symbol_table (struct objfile *objfile) |
| { |
| if (! objfile->msymbols) |
| objfile->msymbols = ((struct minimal_symbol *) |
| obstack_alloc (&objfile->objfile_obstack, |
| sizeof (objfile->msymbols[0]))); |
| |
| { |
| struct minimal_symbol *m |
| = &objfile->msymbols[objfile->minimal_symbol_count]; |
| |
| memset (m, 0, sizeof (*m)); |
| /* Don't rely on these enumeration values being 0's. */ |
| MSYMBOL_TYPE (m) = mst_unknown; |
| SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown); |
| } |
| } |
| |
| |
| /* Put one object file before a specified on in the global list. |
| This can be used to make sure an object file is destroyed before |
| another when using ALL_OBJFILES_SAFE to free all objfiles. */ |
| void |
| put_objfile_before (struct objfile *objfile, struct objfile *before_this) |
| { |
| struct objfile **objp; |
| |
| unlink_objfile (objfile); |
| |
| for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) |
| { |
| if (*objp == before_this) |
| { |
| objfile->next = *objp; |
| *objp = objfile; |
| return; |
| } |
| } |
| |
| internal_error (__FILE__, __LINE__, |
| _("put_objfile_before: before objfile not in list")); |
| } |
| |
| /* Put OBJFILE at the front of the list. */ |
| |
| void |
| objfile_to_front (struct objfile *objfile) |
| { |
| struct objfile **objp; |
| for (objp = &object_files; *objp != NULL; objp = &((*objp)->next)) |
| { |
| if (*objp == objfile) |
| { |
| /* Unhook it from where it is. */ |
| *objp = objfile->next; |
| /* Put it in the front. */ |
| objfile->next = object_files; |
| object_files = objfile; |
| break; |
| } |
| } |
| } |
| |
| /* Unlink OBJFILE from the list of known objfiles, if it is found in the |
| list. |
| |
| It is not a bug, or error, to call this function if OBJFILE is not known |
| to be in the current list. This is done in the case of mapped objfiles, |
| for example, just to ensure that the mapped objfile doesn't appear twice |
| in the list. Since the list is threaded, linking in a mapped objfile |
| twice would create a circular list. |
| |
| If OBJFILE turns out to be in the list, we zap it's NEXT pointer after |
| unlinking it, just to ensure that we have completely severed any linkages |
| between the OBJFILE and the list. */ |
| |
| void |
| unlink_objfile (struct objfile *objfile) |
| { |
| struct objfile **objpp; |
| |
| for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next)) |
| { |
| if (*objpp == objfile) |
| { |
| *objpp = (*objpp)->next; |
| objfile->next = NULL; |
| return; |
| } |
| } |
| |
| internal_error (__FILE__, __LINE__, |
| _("unlink_objfile: objfile already unlinked")); |
| } |
| |
| |
| /* Destroy an objfile and all the symtabs and psymtabs under it. Note |
| that as much as possible is allocated on the objfile_obstack |
| so that the memory can be efficiently freed. |
| |
| Things which we do NOT free because they are not in malloc'd memory |
| or not in memory specific to the objfile include: |
| |
| objfile -> sf |
| |
| FIXME: If the objfile is using reusable symbol information (via mmalloc), |
| then we need to take into account the fact that more than one process |
| may be using the symbol information at the same time (when mmalloc is |
| extended to support cooperative locking). When more than one process |
| is using the mapped symbol info, we need to be more careful about when |
| we free objects in the reusable area. */ |
| |
| void |
| free_objfile (struct objfile *objfile) |
| { |
| if (objfile->separate_debug_objfile) |
| { |
| free_objfile (objfile->separate_debug_objfile); |
| } |
| |
| if (objfile->separate_debug_objfile_backlink) |
| { |
| /* We freed the separate debug file, make sure the base objfile |
| doesn't reference it. */ |
| objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL; |
| } |
| |
| /* Remove any references to this objfile in the global value |
| lists. */ |
| preserve_values (objfile); |
| |
| /* First do any symbol file specific actions required when we are |
| finished with a particular symbol file. Note that if the objfile |
| is using reusable symbol information (via mmalloc) then each of |
| these routines is responsible for doing the correct thing, either |
| freeing things which are valid only during this particular gdb |
| execution, or leaving them to be reused during the next one. */ |
| |
| if (objfile->sf != NULL) |
| { |
| (*objfile->sf->sym_finish) (objfile); |
| } |
| |
| /* We always close the bfd. */ |
| |
| if (objfile->obfd != NULL) |
| { |
| char *name = bfd_get_filename (objfile->obfd); |
| if (!bfd_close (objfile->obfd)) |
| warning (_("cannot close \"%s\": %s"), |
| name, bfd_errmsg (bfd_get_error ())); |
| xfree (name); |
| } |
| |
| /* Remove it from the chain of all objfiles. */ |
| |
| unlink_objfile (objfile); |
| |
| /* If we are going to free the runtime common objfile, mark it |
| as unallocated. */ |
| |
| if (objfile == rt_common_objfile) |
| rt_common_objfile = NULL; |
| |
| /* Before the symbol table code was redone to make it easier to |
| selectively load and remove information particular to a specific |
| linkage unit, gdb used to do these things whenever the monolithic |
| symbol table was blown away. How much still needs to be done |
| is unknown, but we play it safe for now and keep each action until |
| it is shown to be no longer needed. */ |
| |
| /* Not all our callers call clear_symtab_users (objfile_purge_solibs, |
| for example), so we need to call this here. */ |
| clear_pc_function_cache (); |
| |
| /* Clear globals which might have pointed into a removed objfile. |
| FIXME: It's not clear which of these are supposed to persist |
| between expressions and which ought to be reset each time. */ |
| expression_context_block = NULL; |
| innermost_block = NULL; |
| |
| /* Check to see if the current_source_symtab belongs to this objfile, |
| and if so, call clear_current_source_symtab_and_line. */ |
| |
| { |
| struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| struct symtab *s; |
| |
| ALL_OBJFILE_SYMTABS (objfile, s) |
| { |
| if (s == cursal.symtab) |
| clear_current_source_symtab_and_line (); |
| } |
| } |
| |
| /* The last thing we do is free the objfile struct itself. */ |
| |
| objfile_free_data (objfile); |
| if (objfile->name != NULL) |
| { |
| xfree (objfile->name); |
| } |
| if (objfile->global_psymbols.list) |
| xfree (objfile->global_psymbols.list); |
| if (objfile->static_psymbols.list) |
| xfree (objfile->static_psymbols.list); |
| /* Free the obstacks for non-reusable objfiles */ |
| bcache_xfree (objfile->psymbol_cache); |
| bcache_xfree (objfile->macro_cache); |
| if (objfile->demangled_names_hash) |
| htab_delete (objfile->demangled_names_hash); |
| obstack_free (&objfile->objfile_obstack, 0); |
| xfree (objfile); |
| objfile = NULL; |
| } |
| |
| static void |
| do_free_objfile_cleanup (void *obj) |
| { |
| free_objfile (obj); |
| } |
| |
| struct cleanup * |
| make_cleanup_free_objfile (struct objfile *obj) |
| { |
| return make_cleanup (do_free_objfile_cleanup, obj); |
| } |
| |
| /* Free all the object files at once and clean up their users. */ |
| |
| void |
| free_all_objfiles (void) |
| { |
| struct objfile *objfile, *temp; |
| |
| ALL_OBJFILES_SAFE (objfile, temp) |
| { |
| free_objfile (objfile); |
| } |
| clear_symtab_users (); |
| } |
| |
| /* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS |
| entries in new_offsets. */ |
| void |
| objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets) |
| { |
| struct section_offsets *delta = |
| ((struct section_offsets *) |
| alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))); |
| |
| { |
| int i; |
| int something_changed = 0; |
| for (i = 0; i < objfile->num_sections; ++i) |
| { |
| delta->offsets[i] = |
| ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i); |
| if (ANOFFSET (delta, i) != 0) |
| something_changed = 1; |
| } |
| if (!something_changed) |
| return; |
| } |
| |
| /* OK, get all the symtabs. */ |
| { |
| struct symtab *s; |
| |
| ALL_OBJFILE_SYMTABS (objfile, s) |
| { |
| struct linetable *l; |
| struct blockvector *bv; |
| int i; |
| |
| /* First the line table. */ |
| l = LINETABLE (s); |
| if (l) |
| { |
| for (i = 0; i < l->nitems; ++i) |
| l->item[i].pc += ANOFFSET (delta, s->block_line_section); |
| } |
| |
| /* Don't relocate a shared blockvector more than once. */ |
| if (!s->primary) |
| continue; |
| |
| bv = BLOCKVECTOR (s); |
| for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i) |
| { |
| struct block *b; |
| struct symbol *sym; |
| struct dict_iterator iter; |
| |
| b = BLOCKVECTOR_BLOCK (bv, i); |
| BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); |
| BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); |
| |
| ALL_BLOCK_SYMBOLS (b, iter, sym) |
| { |
| fixup_symbol_section (sym, objfile); |
| |
| /* The RS6000 code from which this was taken skipped |
| any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN. |
| But I'm leaving out that test, on the theory that |
| they can't possibly pass the tests below. */ |
| if ((SYMBOL_CLASS (sym) == LOC_LABEL |
| || SYMBOL_CLASS (sym) == LOC_STATIC |
| || SYMBOL_CLASS (sym) == LOC_INDIRECT) |
| && SYMBOL_SECTION (sym) >= 0) |
| { |
| SYMBOL_VALUE_ADDRESS (sym) += |
| ANOFFSET (delta, SYMBOL_SECTION (sym)); |
| } |
| } |
| } |
| } |
| } |
| |
| { |
| struct partial_symtab *p; |
| |
| ALL_OBJFILE_PSYMTABS (objfile, p) |
| { |
| p->textlow += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
| p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
| } |
| } |
| |
| { |
| struct partial_symbol **psym; |
| |
| for (psym = objfile->global_psymbols.list; |
| psym < objfile->global_psymbols.next; |
| psym++) |
| { |
| fixup_psymbol_section (*psym, objfile); |
| if (SYMBOL_SECTION (*psym) >= 0) |
| SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
| SYMBOL_SECTION (*psym)); |
| } |
| for (psym = objfile->static_psymbols.list; |
| psym < objfile->static_psymbols.next; |
| psym++) |
| { |
| fixup_psymbol_section (*psym, objfile); |
| if (SYMBOL_SECTION (*psym) >= 0) |
| SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta, |
| SYMBOL_SECTION (*psym)); |
| } |
| } |
| |
| { |
| struct minimal_symbol *msym; |
| ALL_OBJFILE_MSYMBOLS (objfile, msym) |
| if (SYMBOL_SECTION (msym) >= 0) |
| SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym)); |
| } |
| /* Relocating different sections by different amounts may cause the symbols |
| to be out of order. */ |
| msymbols_sort (objfile); |
| |
| { |
| int i; |
| for (i = 0; i < objfile->num_sections; ++i) |
| (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i); |
| } |
| |
| if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
| { |
| /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT |
| only as a fallback. */ |
| struct obj_section *s; |
| s = find_pc_section (objfile->ei.entry_point); |
| if (s) |
| objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index); |
| else |
| objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile)); |
| } |
| |
| { |
| struct obj_section *s; |
| bfd *abfd; |
| |
| abfd = objfile->obfd; |
| |
| ALL_OBJFILE_OSECTIONS (objfile, s) |
| { |
| int idx = s->the_bfd_section->index; |
| |
| s->addr += ANOFFSET (delta, idx); |
| s->endaddr += ANOFFSET (delta, idx); |
| } |
| } |
| |
| /* Relocate breakpoints as necessary, after things are relocated. */ |
| breakpoint_re_set (); |
| } |
| |
| /* Many places in gdb want to test just to see if we have any partial |
| symbols available. This function returns zero if none are currently |
| available, nonzero otherwise. */ |
| |
| int |
| have_partial_symbols (void) |
| { |
| struct objfile *ofp; |
| |
| ALL_OBJFILES (ofp) |
| { |
| if (ofp->psymtabs != NULL) |
| { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /* Many places in gdb want to test just to see if we have any full |
| symbols available. This function returns zero if none are currently |
| available, nonzero otherwise. */ |
| |
| int |
| have_full_symbols (void) |
| { |
| struct objfile *ofp; |
| |
| ALL_OBJFILES (ofp) |
| { |
| if (ofp->symtabs != NULL) |
| { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* This operations deletes all objfile entries that represent solibs that |
| weren't explicitly loaded by the user, via e.g., the add-symbol-file |
| command. |
| */ |
| void |
| objfile_purge_solibs (void) |
| { |
| struct objfile *objf; |
| struct objfile *temp; |
| |
| ALL_OBJFILES_SAFE (objf, temp) |
| { |
| /* We assume that the solib package has been purged already, or will |
| be soon. |
| */ |
| if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED)) |
| free_objfile (objf); |
| } |
| } |
| |
| |
| /* Many places in gdb want to test just to see if we have any minimal |
| symbols available. This function returns zero if none are currently |
| available, nonzero otherwise. */ |
| |
| int |
| have_minimal_symbols (void) |
| { |
| struct objfile *ofp; |
| |
| ALL_OBJFILES (ofp) |
| { |
| if (ofp->minimal_symbol_count > 0) |
| { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /* Returns a section whose range includes PC and SECTION, or NULL if |
| none found. Note the distinction between the return type, struct |
| obj_section (which is defined in gdb), and the input type "struct |
| bfd_section" (which is a bfd-defined data type). The obj_section |
| contains a pointer to the "struct bfd_section". */ |
| |
| struct obj_section * |
| find_pc_sect_section (CORE_ADDR pc, struct bfd_section *section) |
| { |
| struct obj_section *s; |
| struct objfile *objfile; |
| |
| ALL_OBJSECTIONS (objfile, s) |
| if ((section == 0 || section == s->the_bfd_section) && |
| s->addr <= pc && pc < s->endaddr) |
| return (s); |
| |
| return (NULL); |
| } |
| |
| /* Returns a section whose range includes PC or NULL if none found. |
| Backward compatibility, no section. */ |
| |
| struct obj_section * |
| find_pc_section (CORE_ADDR pc) |
| { |
| return find_pc_sect_section (pc, find_pc_mapped_section (pc)); |
| } |
| |
| |
| /* In SVR4, we recognize a trampoline by it's section name. |
| That is, if the pc is in a section named ".plt" then we are in |
| a trampoline. */ |
| |
| int |
| in_plt_section (CORE_ADDR pc, char *name) |
| { |
| struct obj_section *s; |
| int retval = 0; |
| |
| s = find_pc_section (pc); |
| |
| retval = (s != NULL |
| && s->the_bfd_section->name != NULL |
| && strcmp (s->the_bfd_section->name, ".plt") == 0); |
| return (retval); |
| } |
| |
| /* Return nonzero if NAME is in the import list of OBJFILE. Else |
| return zero. */ |
| |
| int |
| is_in_import_list (char *name, struct objfile *objfile) |
| { |
| int i; |
| |
| if (!objfile || !name || !*name) |
| return 0; |
| |
| for (i = 0; i < objfile->import_list_size; i++) |
| if (objfile->import_list[i] && DEPRECATED_STREQ (name, objfile->import_list[i])) |
| return 1; |
| return 0; |
| } |
| |
| |
| /* Keep a registry of per-objfile data-pointers required by other GDB |
| modules. */ |
| |
| struct objfile_data |
| { |
| unsigned index; |
| }; |
| |
| struct objfile_data_registration |
| { |
| struct objfile_data *data; |
| struct objfile_data_registration *next; |
| }; |
| |
| struct objfile_data_registry |
| { |
| struct objfile_data_registration *registrations; |
| unsigned num_registrations; |
| }; |
| |
| static struct objfile_data_registry objfile_data_registry = { NULL, 0 }; |
| |
| const struct objfile_data * |
| register_objfile_data (void) |
| { |
| struct objfile_data_registration **curr; |
| |
| /* Append new registration. */ |
| for (curr = &objfile_data_registry.registrations; |
| *curr != NULL; curr = &(*curr)->next); |
| |
| *curr = XMALLOC (struct objfile_data_registration); |
| (*curr)->next = NULL; |
| (*curr)->data = XMALLOC (struct objfile_data); |
| (*curr)->data->index = objfile_data_registry.num_registrations++; |
| |
| return (*curr)->data; |
| } |
| |
| static void |
| objfile_alloc_data (struct objfile *objfile) |
| { |
| gdb_assert (objfile->data == NULL); |
| objfile->num_data = objfile_data_registry.num_registrations; |
| objfile->data = XCALLOC (objfile->num_data, void *); |
| } |
| |
| static void |
| objfile_free_data (struct objfile *objfile) |
| { |
| gdb_assert (objfile->data != NULL); |
| xfree (objfile->data); |
| objfile->data = NULL; |
| } |
| |
| void |
| clear_objfile_data (struct objfile *objfile) |
| { |
| gdb_assert (objfile->data != NULL); |
| memset (objfile->data, 0, objfile->num_data * sizeof (void *)); |
| } |
| |
| void |
| set_objfile_data (struct objfile *objfile, const struct objfile_data *data, |
| void *value) |
| { |
| gdb_assert (data->index < objfile->num_data); |
| objfile->data[data->index] = value; |
| } |
| |
| void * |
| objfile_data (struct objfile *objfile, const struct objfile_data *data) |
| { |
| gdb_assert (data->index < objfile->num_data); |
| return objfile->data[data->index]; |
| } |