| /* GDB routines for manipulating objfiles. |
| Copyright 1992, 1993, 1994, 1995 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., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, 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 <sys/types.h> |
| #include "gdb_stat.h" |
| #include <fcntl.h> |
| #include "obstack.h" |
| #include "gdb_string.h" |
| |
| #include "breakpoint.h" |
| |
| /* Prototypes for local functions */ |
| |
| #if defined(USE_MMALLOC) && defined(HAVE_MMAP) |
| |
| static int |
| open_existing_mapped_file PARAMS ((char *, long, int)); |
| |
| static int |
| open_mapped_file PARAMS ((char *filename, long mtime, int mapped)); |
| |
| static PTR |
| map_to_file PARAMS ((int)); |
| |
| #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
| |
| static void |
| add_to_objfile_sections PARAMS ((bfd *, sec_ptr, PTR)); |
| |
| /* 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 */ |
| |
| int mapped_symbol_files; /* Try to use mapped symbol files */ |
| |
| /* 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 (abfd, asect, objfile_p_char) |
| bfd *abfd; |
| sec_ptr asect; |
| PTR 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->psymbol_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 (objfile) |
| 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 psymbol_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->psymbol_obstack); |
| objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end; |
| return (0); |
| } |
| |
| /* Given a pointer to an initialized bfd (ABFD) and a flag that indicates |
| whether or not an objfile is to be mapped (MAPPED), 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. |
| |
| USER_LOADED is simply recorded in the objfile. This record offers a way for |
| run_command to remove old objfile entries which are no longer valid (i.e., |
| are associated with an old inferior), but to preserve ones that the user |
| explicitly loaded via the add-symbol-file command. |
| |
| IS_SOLIB is also simply recorded in the objfile. */ |
| |
| struct objfile * |
| allocate_objfile (abfd, mapped, user_loaded, is_solib) |
| bfd *abfd; |
| int mapped; |
| int user_loaded; |
| int is_solib; |
| { |
| struct objfile *objfile = NULL; |
| struct objfile *last_one = NULL; |
| |
| mapped |= mapped_symbol_files; |
| |
| #if defined(USE_MMALLOC) && defined(HAVE_MMAP) |
| if (abfd != NULL) |
| { |
| |
| /* If we can support mapped symbol files, try to open/reopen the |
| mapped file that corresponds to the file from which we wish to |
| read symbols. If the objfile is to be mapped, we must malloc |
| the structure itself using the mmap version, and arrange that |
| all memory allocation for the objfile uses the mmap routines. |
| If we are reusing an existing mapped file, from which we get |
| our objfile pointer, we have to make sure that we update the |
| pointers to the alloc/free functions in the obstack, in case |
| these functions have moved within the current gdb. */ |
| |
| int fd; |
| |
| fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd), |
| mapped); |
| if (fd >= 0) |
| { |
| PTR md; |
| |
| if ((md = map_to_file (fd)) == NULL) |
| { |
| close (fd); |
| } |
| else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL) |
| { |
| /* Update memory corruption handler function addresses. */ |
| init_malloc (md); |
| objfile->md = md; |
| objfile->mmfd = fd; |
| /* Update pointers to functions to *our* copies */ |
| obstack_chunkfun (&objfile->psymbol_cache.cache, xmmalloc); |
| obstack_freefun (&objfile->psymbol_cache.cache, mfree); |
| obstack_chunkfun (&objfile->psymbol_obstack, xmmalloc); |
| obstack_freefun (&objfile->psymbol_obstack, mfree); |
| obstack_chunkfun (&objfile->symbol_obstack, xmmalloc); |
| obstack_freefun (&objfile->symbol_obstack, mfree); |
| obstack_chunkfun (&objfile->type_obstack, xmmalloc); |
| obstack_freefun (&objfile->type_obstack, mfree); |
| /* If already in objfile list, unlink it. */ |
| unlink_objfile (objfile); |
| /* Forget things specific to a particular gdb, may have changed. */ |
| objfile->sf = NULL; |
| } |
| else |
| { |
| |
| /* Set up to detect internal memory corruption. MUST be |
| done before the first malloc. See comments in |
| init_malloc() and mmcheck(). */ |
| |
| init_malloc (md); |
| |
| objfile = (struct objfile *) |
| xmmalloc (md, sizeof (struct objfile)); |
| memset (objfile, 0, sizeof (struct objfile)); |
| objfile->md = md; |
| objfile->mmfd = fd; |
| objfile->flags |= OBJF_MAPPED; |
| mmalloc_setkey (objfile->md, 0, objfile); |
| obstack_specify_allocation_with_arg (&objfile->psymbol_cache.cache, |
| 0, 0, xmmalloc, mfree, |
| objfile->md); |
| obstack_specify_allocation_with_arg (&objfile->psymbol_obstack, |
| 0, 0, xmmalloc, mfree, |
| objfile->md); |
| obstack_specify_allocation_with_arg (&objfile->symbol_obstack, |
| 0, 0, xmmalloc, mfree, |
| objfile->md); |
| obstack_specify_allocation_with_arg (&objfile->type_obstack, |
| 0, 0, xmmalloc, mfree, |
| objfile->md); |
| } |
| } |
| |
| if (mapped && (objfile == NULL)) |
| { |
| warning ("symbol table for '%s' will not be mapped", |
| bfd_get_filename (abfd)); |
| } |
| } |
| #else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */ |
| |
| if (mapped) |
| { |
| warning ("mapped symbol tables are not supported on this machine; missing or broken mmap()."); |
| |
| /* Turn off the global flag so we don't try to do mapped symbol tables |
| any more, which shuts up gdb unless the user specifically gives the |
| "mapped" keyword again. */ |
| |
| mapped_symbol_files = 0; |
| } |
| |
| #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
| |
| /* 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; |
| obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, |
| xmalloc, free); |
| obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc, |
| free); |
| obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc, |
| free); |
| obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc, |
| free); |
| } |
| |
| /* 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) |
| { |
| mfree (objfile->md, objfile->name); |
| } |
| if (abfd != NULL) |
| { |
| objfile->name = mstrsave (objfile->md, 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 ())); |
| } |
| } |
| |
| /* 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; |
| } |
| |
| /* Record whether this objfile was created because the user explicitly |
| caused it (e.g., used the add-symbol-file command). |
| */ |
| objfile->user_loaded = user_loaded; |
| |
| /* Record whether this objfile definitely represents a solib. */ |
| objfile->is_solib = is_solib; |
| |
| return (objfile); |
| } |
| |
| /* Put OBJFILE at the front of the list. */ |
| |
| void |
| objfile_to_front (objfile) |
| 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 (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; |
| break; |
| } |
| } |
| } |
| |
| |
| /* Destroy an objfile and all the symtabs and psymtabs under it. Note |
| that as much as possible is allocated on the symbol_obstack and |
| psymbol_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 (objfile) |
| struct objfile *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 ())); |
| free (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. */ |
| |
| #if defined (CLEAR_SOLIB) |
| CLEAR_SOLIB (); |
| /* CLEAR_SOLIB closes the bfd's for any shared libraries. But |
| the to_sections for a core file might refer to those bfd's. So |
| detach any core file. */ |
| { |
| struct target_ops *t = find_core_target (); |
| if (t != NULL) |
| (t->to_detach) (NULL, 0); |
| } |
| #endif |
| /* I *think* all our callers call clear_symtab_users. If so, no need |
| to call this here. */ |
| clear_pc_function_cache (); |
| |
| /* The last thing we do is free the objfile struct itself for the |
| non-reusable case, or detach from the mapped file for the reusable |
| case. Note that the mmalloc_detach or the mfree is the last thing |
| we can do with this objfile. */ |
| |
| #if defined(USE_MMALLOC) && defined(HAVE_MMAP) |
| |
| if (objfile->flags & OBJF_MAPPED) |
| { |
| /* Remember the fd so we can close it. We can't close it before |
| doing the detach, and after the detach the objfile is gone. */ |
| int mmfd; |
| |
| mmfd = objfile->mmfd; |
| mmalloc_detach (objfile->md); |
| objfile = NULL; |
| close (mmfd); |
| } |
| |
| #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
| |
| /* If we still have an objfile, then either we don't support reusable |
| objfiles or this one was not reusable. So free it normally. */ |
| |
| if (objfile != NULL) |
| { |
| if (objfile->name != NULL) |
| { |
| mfree (objfile->md, objfile->name); |
| } |
| if (objfile->global_psymbols.list) |
| mfree (objfile->md, objfile->global_psymbols.list); |
| if (objfile->static_psymbols.list) |
| mfree (objfile->md, objfile->static_psymbols.list); |
| /* Free the obstacks for non-reusable objfiles */ |
| obstack_free (&objfile->psymbol_cache.cache, 0); |
| obstack_free (&objfile->psymbol_obstack, 0); |
| obstack_free (&objfile->symbol_obstack, 0); |
| obstack_free (&objfile->type_obstack, 0); |
| mfree (objfile->md, objfile); |
| objfile = NULL; |
| } |
| } |
| |
| |
| /* Free all the object files at once and clean up their users. */ |
| |
| void |
| free_all_objfiles () |
| { |
| 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 (objfile, new_offsets) |
| struct objfile *objfile; |
| struct section_offsets *new_offsets; |
| { |
| struct section_offsets *delta = |
| (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
| |
| { |
| int i; |
| int something_changed = 0; |
| for (i = 0; i < objfile->num_sections; ++i) |
| { |
| ANOFFSET (delta, 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; |
| int j; |
| |
| b = BLOCKVECTOR_BLOCK (bv, i); |
| BLOCK_START (b) += ANOFFSET (delta, s->block_line_section); |
| BLOCK_END (b) += ANOFFSET (delta, s->block_line_section); |
| |
| for (j = 0; j < BLOCK_NSYMS (b); ++j) |
| { |
| struct symbol *sym = BLOCK_SYM (b, j); |
| /* The RS6000 code from which this was taken skipped |
| any symbols in STRUCT_NAMESPACE or UNDEF_NAMESPACE. |
| 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)); |
| } |
| #ifdef MIPS_EFI_SYMBOL_NAME |
| /* Relocate Extra Function Info for ecoff. */ |
| |
| else if (SYMBOL_CLASS (sym) == LOC_CONST |
| && SYMBOL_NAMESPACE (sym) == LABEL_NAMESPACE |
| && STRCMP (SYMBOL_NAME (sym), MIPS_EFI_SYMBOL_NAME) == 0) |
| ecoff_relocate_efi (sym, ANOFFSET (delta, |
| s->block_line_section)); |
| #endif |
| } |
| } |
| } |
| } |
| |
| { |
| struct partial_symtab *p; |
| |
| ALL_OBJFILE_PSYMTABS (objfile, p) |
| { |
| p->textlow += ANOFFSET (delta, SECT_OFF_TEXT); |
| p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT); |
| } |
| } |
| |
| { |
| struct partial_symbol **psym; |
| |
| for (psym = objfile->global_psymbols.list; |
| psym < objfile->global_psymbols.next; |
| psym++) |
| 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++) |
| 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) |
| ANOFFSET (objfile->section_offsets, i) = ANOFFSET (new_offsets, i); |
| } |
| |
| { |
| struct obj_section *s; |
| bfd *abfd; |
| |
| abfd = objfile->obfd; |
| |
| ALL_OBJFILE_OSECTIONS (objfile, s) |
| { |
| flagword flags; |
| |
| flags = bfd_get_section_flags (abfd, s->the_bfd_section); |
| |
| if (flags & SEC_CODE) |
| { |
| s->addr += ANOFFSET (delta, SECT_OFF_TEXT); |
| s->endaddr += ANOFFSET (delta, SECT_OFF_TEXT); |
| } |
| else if (flags & (SEC_DATA | SEC_LOAD)) |
| { |
| s->addr += ANOFFSET (delta, SECT_OFF_DATA); |
| s->endaddr += ANOFFSET (delta, SECT_OFF_DATA); |
| } |
| else if (flags & SEC_ALLOC) |
| { |
| s->addr += ANOFFSET (delta, SECT_OFF_BSS); |
| s->endaddr += ANOFFSET (delta, SECT_OFF_BSS); |
| } |
| } |
| } |
| |
| if (objfile->ei.entry_point != ~(CORE_ADDR) 0) |
| objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT); |
| |
| if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC) |
| { |
| objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
| objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
| } |
| |
| if (objfile->ei.entry_file_lowpc != INVALID_ENTRY_LOWPC) |
| { |
| objfile->ei.entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
| objfile->ei.entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
| } |
| |
| if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC) |
| { |
| objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT); |
| objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT); |
| } |
| |
| /* 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 () |
| { |
| 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 () |
| { |
| 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 () |
| { |
| 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->user_loaded && objf->is_solib) |
| 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 () |
| { |
| struct objfile *ofp; |
| |
| ALL_OBJFILES (ofp) |
| { |
| if (ofp->msymbols != NULL) |
| { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| #if defined(USE_MMALLOC) && defined(HAVE_MMAP) |
| |
| /* Given the name of a mapped symbol file in SYMSFILENAME, and the timestamp |
| of the corresponding symbol file in MTIME, try to open an existing file |
| with the name SYMSFILENAME and verify it is more recent than the base |
| file by checking it's timestamp against MTIME. |
| |
| If SYMSFILENAME does not exist (or can't be stat'd), simply returns -1. |
| |
| If SYMSFILENAME does exist, but is out of date, we check to see if the |
| user has specified creation of a mapped file. If so, we don't issue |
| any warning message because we will be creating a new mapped file anyway, |
| overwriting the old one. If not, then we issue a warning message so that |
| the user will know why we aren't using this existing mapped symbol file. |
| In either case, we return -1. |
| |
| If SYMSFILENAME does exist and is not out of date, but can't be opened for |
| some reason, then prints an appropriate system error message and returns -1. |
| |
| Otherwise, returns the open file descriptor. */ |
| |
| static int |
| open_existing_mapped_file (symsfilename, mtime, mapped) |
| char *symsfilename; |
| long mtime; |
| int mapped; |
| { |
| int fd = -1; |
| struct stat sbuf; |
| |
| if (stat (symsfilename, &sbuf) == 0) |
| { |
| if (sbuf.st_mtime < mtime) |
| { |
| if (!mapped) |
| { |
| warning ("mapped symbol file `%s' is out of date, ignored it", |
| symsfilename); |
| } |
| } |
| else if ((fd = open (symsfilename, O_RDWR)) < 0) |
| { |
| if (error_pre_print) |
| { |
| printf_unfiltered (error_pre_print); |
| } |
| print_sys_errmsg (symsfilename, errno); |
| } |
| } |
| return (fd); |
| } |
| |
| /* Look for a mapped symbol file that corresponds to FILENAME and is more |
| recent than MTIME. If MAPPED is nonzero, the user has asked that gdb |
| use a mapped symbol file for this file, so create a new one if one does |
| not currently exist. |
| |
| If found, then return an open file descriptor for the file, otherwise |
| return -1. |
| |
| This routine is responsible for implementing the policy that generates |
| the name of the mapped symbol file from the name of a file containing |
| symbols that gdb would like to read. Currently this policy is to append |
| ".syms" to the name of the file. |
| |
| This routine is also responsible for implementing the policy that |
| determines where the mapped symbol file is found (the search path). |
| This policy is that when reading an existing mapped file, a file of |
| the correct name in the current directory takes precedence over a |
| file of the correct name in the same directory as the symbol file. |
| When creating a new mapped file, it is always created in the current |
| directory. This helps to minimize the chances of a user unknowingly |
| creating big mapped files in places like /bin and /usr/local/bin, and |
| allows a local copy to override a manually installed global copy (in |
| /bin for example). */ |
| |
| static int |
| open_mapped_file (filename, mtime, mapped) |
| char *filename; |
| long mtime; |
| int mapped; |
| { |
| int fd; |
| char *symsfilename; |
| |
| /* First try to open an existing file in the current directory, and |
| then try the directory where the symbol file is located. */ |
| |
| symsfilename = concat ("./", basename (filename), ".syms", (char *) NULL); |
| if ((fd = open_existing_mapped_file (symsfilename, mtime, mapped)) < 0) |
| { |
| free (symsfilename); |
| symsfilename = concat (filename, ".syms", (char *) NULL); |
| fd = open_existing_mapped_file (symsfilename, mtime, mapped); |
| } |
| |
| /* If we don't have an open file by now, then either the file does not |
| already exist, or the base file has changed since it was created. In |
| either case, if the user has specified use of a mapped file, then |
| create a new mapped file, truncating any existing one. If we can't |
| create one, print a system error message saying why we can't. |
| |
| By default the file is rw for everyone, with the user's umask taking |
| care of turning off the permissions the user wants off. */ |
| |
| if ((fd < 0) && mapped) |
| { |
| free (symsfilename); |
| symsfilename = concat ("./", basename (filename), ".syms", |
| (char *) NULL); |
| if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) |
| { |
| if (error_pre_print) |
| { |
| printf_unfiltered (error_pre_print); |
| } |
| print_sys_errmsg (symsfilename, errno); |
| } |
| } |
| |
| free (symsfilename); |
| return (fd); |
| } |
| |
| static PTR |
| map_to_file (fd) |
| int fd; |
| { |
| PTR md; |
| CORE_ADDR mapto; |
| |
| md = mmalloc_attach (fd, (PTR) 0); |
| if (md != NULL) |
| { |
| mapto = (CORE_ADDR) mmalloc_getkey (md, 1); |
| md = mmalloc_detach (md); |
| if (md != NULL) |
| { |
| /* FIXME: should figure out why detach failed */ |
| md = NULL; |
| } |
| else if (mapto != (CORE_ADDR) NULL) |
| { |
| /* This mapping file needs to be remapped at "mapto" */ |
| md = mmalloc_attach (fd, (PTR) mapto); |
| } |
| else |
| { |
| /* This is a freshly created mapping file. */ |
| mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024); |
| if (mapto != 0) |
| { |
| /* To avoid reusing the freshly created mapping file, at the |
| address selected by mmap, we must truncate it before trying |
| to do an attach at the address we want. */ |
| ftruncate (fd, 0); |
| md = mmalloc_attach (fd, (PTR) mapto); |
| if (md != NULL) |
| { |
| mmalloc_setkey (md, 1, (PTR) mapto); |
| } |
| } |
| } |
| } |
| return (md); |
| } |
| |
| #endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */ |
| |
| /* 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 sec (which is a bfd-defined data type). The obj_section |
| contains a pointer to the bfd struct sec section. */ |
| |
| struct obj_section * |
| find_pc_sect_section (pc, section) |
| CORE_ADDR pc; |
| struct sec *section; |
| { |
| struct obj_section *s; |
| struct objfile *objfile; |
| |
| ALL_OBJSECTIONS (objfile, s) |
| #if defined(HPUXHPPA) |
| if ((section == 0 || section == s->the_bfd_section) && |
| s->addr <= pc && pc <= s->endaddr) |
| #else |
| if ((section == 0 || section == s->the_bfd_section) && |
| s->addr <= pc && pc < s->endaddr) |
| #endif |
| 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 (pc) |
| 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 (pc, name) |
| 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 |
| && STREQ (s->the_bfd_section->name, ".plt")); |
| return (retval); |
| } |
| |
| /* Return nonzero if NAME is in the import list of OBJFILE. Else |
| return zero. */ |
| |
| int |
| is_in_import_list (name, objfile) |
| char *name; |
| struct objfile *objfile; |
| { |
| register int i; |
| |
| if (!objfile || !name || !*name) |
| return 0; |
| |
| for (i = 0; i < objfile->import_list_size; i++) |
| if (objfile->import_list[i] && STREQ (name, objfile->import_list[i])) |
| return 1; |
| return 0; |
| } |
| |