1999-04-16 03:35:26 +02:00
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/* GDB routines for manipulating objfiles.
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Copyright 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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Contributed by Cygnus Support, using pieces from other GDB modules.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This file contains support routines for creating, manipulating, and
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destroying objfile structures. */
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#include "defs.h"
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#include "bfd.h" /* Binary File Description */
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#include "symtab.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdb-stabs.h"
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#include "target.h"
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#include <sys/types.h>
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#include "gdb_stat.h"
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#include <fcntl.h>
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#include "obstack.h"
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#include "gdb_string.h"
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1999-04-26 20:34:20 +02:00
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#include "breakpoint.h"
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1999-04-16 03:35:26 +02:00
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/* Prototypes for local functions */
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#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
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static int
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open_existing_mapped_file PARAMS ((char *, long, int));
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static int
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open_mapped_file PARAMS ((char *filename, long mtime, int mapped));
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static PTR
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map_to_file PARAMS ((int));
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#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
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static void
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add_to_objfile_sections PARAMS ((bfd *, sec_ptr, PTR));
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/* Externally visible variables that are owned by this module.
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See declarations in objfile.h for more info. */
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struct objfile *object_files; /* Linked list of all objfiles */
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struct objfile *current_objfile; /* For symbol file being read in */
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struct objfile *symfile_objfile; /* Main symbol table loaded from */
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struct objfile *rt_common_objfile; /* For runtime common symbols */
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int mapped_symbol_files; /* Try to use mapped symbol files */
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/* Locate all mappable sections of a BFD file.
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objfile_p_char is a char * to get it through
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bfd_map_over_sections; we cast it back to its proper type. */
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#ifndef TARGET_KEEP_SECTION
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#define TARGET_KEEP_SECTION(ASECT) 0
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#endif
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static void
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add_to_objfile_sections (abfd, asect, objfile_p_char)
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bfd *abfd;
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sec_ptr asect;
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PTR objfile_p_char;
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{
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struct objfile *objfile = (struct objfile *) objfile_p_char;
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struct obj_section section;
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flagword aflag;
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aflag = bfd_get_section_flags (abfd, asect);
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if (!(aflag & SEC_ALLOC) && !(TARGET_KEEP_SECTION(asect)))
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return;
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if (0 == bfd_section_size (abfd, asect))
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return;
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section.offset = 0;
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section.objfile = objfile;
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section.the_bfd_section = asect;
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section.ovly_mapped = 0;
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section.addr = bfd_section_vma (abfd, asect);
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section.endaddr = section.addr + bfd_section_size (abfd, asect);
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obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof(section));
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objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1);
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}
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/* Builds a section table for OBJFILE.
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Returns 0 if OK, 1 on error (in which case bfd_error contains the
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error). */
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int
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build_objfile_section_table (objfile)
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struct objfile *objfile;
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{
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/* objfile->sections can be already set when reading a mapped symbol
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file. I believe that we do need to rebuild the section table in
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this case (we rebuild other things derived from the bfd), but we
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can't free the old one (it's in the psymbol_obstack). So we just
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waste some memory. */
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objfile->sections_end = 0;
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bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *)objfile);
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objfile->sections = (struct obj_section *)
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obstack_finish (&objfile->psymbol_obstack);
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objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end;
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return(0);
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}
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/* Given a pointer to an initialized bfd (ABFD) and a flag that indicates
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whether or not an objfile is to be mapped (MAPPED), allocate a new objfile
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struct, fill it in as best we can, link it into the list of all known
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objfiles, and return a pointer to the new objfile struct.
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USER_LOADED is simply recorded in the objfile. This record offers a way for
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run_command to remove old objfile entries which are no longer valid (i.e.,
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are associated with an old inferior), but to preserve ones that the user
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explicitly loaded via the add-symbol-file command.
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IS_SOLIB is also simply recorded in the objfile. */
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struct objfile *
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allocate_objfile (abfd, mapped, user_loaded, is_solib)
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bfd *abfd;
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int mapped;
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int user_loaded;
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int is_solib;
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{
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struct objfile *objfile = NULL;
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struct objfile *last_one = NULL;
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mapped |= mapped_symbol_files;
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#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
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if (abfd != NULL)
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{
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/* If we can support mapped symbol files, try to open/reopen the
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mapped file that corresponds to the file from which we wish to
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read symbols. If the objfile is to be mapped, we must malloc
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the structure itself using the mmap version, and arrange that
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all memory allocation for the objfile uses the mmap routines.
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If we are reusing an existing mapped file, from which we get
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our objfile pointer, we have to make sure that we update the
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pointers to the alloc/free functions in the obstack, in case
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these functions have moved within the current gdb. */
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int fd;
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fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd),
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mapped);
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if (fd >= 0)
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{
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PTR md;
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if ((md = map_to_file (fd)) == NULL)
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{
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close (fd);
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}
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else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL)
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{
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/* Update memory corruption handler function addresses. */
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init_malloc (md);
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objfile -> md = md;
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objfile -> mmfd = fd;
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/* Update pointers to functions to *our* copies */
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obstack_chunkfun (&objfile -> psymbol_cache.cache, xmmalloc);
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obstack_freefun (&objfile -> psymbol_cache.cache, mfree);
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obstack_chunkfun (&objfile -> psymbol_obstack, xmmalloc);
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obstack_freefun (&objfile -> psymbol_obstack, mfree);
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obstack_chunkfun (&objfile -> symbol_obstack, xmmalloc);
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obstack_freefun (&objfile -> symbol_obstack, mfree);
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obstack_chunkfun (&objfile -> type_obstack, xmmalloc);
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obstack_freefun (&objfile -> type_obstack, mfree);
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/* If already in objfile list, unlink it. */
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unlink_objfile (objfile);
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/* Forget things specific to a particular gdb, may have changed. */
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objfile -> sf = NULL;
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}
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else
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{
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/* Set up to detect internal memory corruption. MUST be
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done before the first malloc. See comments in
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init_malloc() and mmcheck(). */
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init_malloc (md);
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objfile = (struct objfile *)
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xmmalloc (md, sizeof (struct objfile));
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memset (objfile, 0, sizeof (struct objfile));
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objfile -> md = md;
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objfile -> mmfd = fd;
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objfile -> flags |= OBJF_MAPPED;
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mmalloc_setkey (objfile -> md, 0, objfile);
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obstack_specify_allocation_with_arg (&objfile -> psymbol_cache.cache,
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0, 0, xmmalloc, mfree,
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objfile -> md);
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obstack_specify_allocation_with_arg (&objfile -> psymbol_obstack,
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0, 0, xmmalloc, mfree,
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objfile -> md);
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obstack_specify_allocation_with_arg (&objfile -> symbol_obstack,
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0, 0, xmmalloc, mfree,
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objfile -> md);
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obstack_specify_allocation_with_arg (&objfile -> type_obstack,
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0, 0, xmmalloc, mfree,
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objfile -> md);
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}
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}
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if (mapped && (objfile == NULL))
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{
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warning ("symbol table for '%s' will not be mapped",
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bfd_get_filename (abfd));
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}
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}
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#else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */
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if (mapped)
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{
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warning ("mapped symbol tables are not supported on this machine; missing or broken mmap().");
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/* Turn off the global flag so we don't try to do mapped symbol tables
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any more, which shuts up gdb unless the user specifically gives the
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"mapped" keyword again. */
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mapped_symbol_files = 0;
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}
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#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
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/* If we don't support mapped symbol files, didn't ask for the file to be
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mapped, or failed to open the mapped file for some reason, then revert
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back to an unmapped objfile. */
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if (objfile == NULL)
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{
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objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
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memset (objfile, 0, sizeof (struct objfile));
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objfile -> md = NULL;
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obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0,
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xmalloc, free);
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obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, xmalloc,
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free);
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obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, xmalloc,
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free);
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obstack_specify_allocation (&objfile -> type_obstack, 0, 0, xmalloc,
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free);
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}
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/* Update the per-objfile information that comes from the bfd, ensuring
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that any data that is reference is saved in the per-objfile data
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region. */
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objfile -> obfd = abfd;
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if (objfile -> name != NULL)
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{
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mfree (objfile -> md, objfile -> name);
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}
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if (abfd != NULL)
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{
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objfile -> name = mstrsave (objfile -> md, bfd_get_filename (abfd));
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objfile -> mtime = bfd_get_mtime (abfd);
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/* Build section table. */
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if (build_objfile_section_table (objfile))
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{
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error ("Can't find the file sections in `%s': %s",
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objfile -> name, bfd_errmsg (bfd_get_error ()));
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}
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}
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/* Add this file onto the tail of the linked list of other such files. */
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objfile -> next = NULL;
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if (object_files == NULL)
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object_files = objfile;
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else
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{
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for (last_one = object_files;
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last_one -> next;
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last_one = last_one -> next);
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last_one -> next = objfile;
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}
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/* Record whether this objfile was created because the user explicitly
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caused it (e.g., used the add-symbol-file command).
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*/
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objfile -> user_loaded = user_loaded;
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/* Record whether this objfile definitely represents a solib. */
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objfile -> is_solib = is_solib;
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return (objfile);
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}
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/* Put OBJFILE at the front of the list. */
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void
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objfile_to_front (objfile)
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struct objfile *objfile;
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{
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struct objfile **objp;
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for (objp = &object_files; *objp != NULL; objp = &((*objp)->next))
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|
{
|
|
|
|
|
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 (struct section_offsets)
|
|
|
|
|
+ objfile->num_sections * sizeof (delta->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;
|
|
|
|
|
|
|
|
|
|
for (s = objfile->sections;
|
|
|
|
|
s < objfile->sections_end; ++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_OBJFILES (objfile)
|
|
|
|
|
for (s = objfile->sections; s < objfile->sections_end; ++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);
|
|
|
|
|
}
|