/* GDB routines for manipulating objfiles.
- Copyright 1992 Free Software Foundation, Inc.
+ 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 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 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.
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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 <stdio.h>
#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 <obstack.h>
+#include <sys/types.h>
+#include "gdb_stat.h"
+#include <fcntl.h>
+#include "obstack.h"
+#include "gdb_string.h"
-/* Externally visible variables that are owned by this module. */
+#include "breakpoint.h"
-struct objfile *object_files; /* Linked list of all objfiles */
+/* Prototypes for local functions */
-/* Allocate a new objfile struct, fill it in as best we can, and return it.
- It is also linked into the list of all known object files. */
+#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, filename, dumpable)
+allocate_objfile (abfd, mapped, user_loaded, is_solib)
bfd *abfd;
- char *filename;
- int dumpable;
+ int mapped;
+ int user_loaded;
+ int is_solib;
{
- struct objfile *objfile;
+ struct objfile *objfile = NULL;
+ struct objfile *last_one = NULL;
- /* First, if the objfile is to be dumpable, we must malloc the structure
- itself using the mmap version, and arrange that all memory allocation
- for the objfile uses the mmap routines. Otherwise, just use the
- old sbrk'd malloc routines. */
+ mapped |= mapped_symbol_files;
- if (dumpable)
+#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
+ if (abfd != NULL)
{
- objfile = (struct objfile *) mmap_xmalloc (sizeof (struct objfile));
- (void) memset (objfile, 0, sizeof (struct objfile));
- objfile -> malloc = mmap_malloc;
- objfile -> realloc = mmap_realloc;
- objfile -> xmalloc = mmap_xmalloc;
- objfile -> xrealloc = mmap_xrealloc;
- objfile -> free = mmap_free;
- objfile -> flags |= OBJF_DUMPABLE;
+
+ /* 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
+#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));
- (void) memset (objfile, 0, sizeof (struct objfile));
- objfile -> malloc = xmalloc;
- objfile -> realloc = xrealloc;
- objfile -> xmalloc = xmalloc;
- objfile -> xrealloc = xrealloc;
- objfile -> free = free;
+ 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);
}
- /* Now, malloc a fresh copy of the filename string using the malloc
- specified as appropriate for the 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 -> name = (*objfile -> xmalloc) (strlen (filename) + 1);
- strcpy (objfile -> name, filename);
+ 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);
- objfile -> obfd = abfd;
+ /* Build section table. */
- objfile -> mtime = bfd_get_mtime (abfd);
+ if (build_objfile_section_table (objfile))
+ {
+ error ("Can't find the file sections in `%s': %s",
+ objfile->name, bfd_errmsg (bfd_get_error ()));
+ }
+ }
- /* Set up the various obstacks to use the memory allocation/free
- functions that are appropriate for this objfile. */
+ /* Add this file onto the tail of the linked list of other such files. */
- obstack_full_begin (&objfile -> psymbol_obstack, 0, 0,
- objfile -> xmalloc, objfile -> free);
- obstack_full_begin (&objfile -> symbol_obstack, 0, 0,
- objfile -> xmalloc, objfile -> free);
- obstack_full_begin (&objfile -> type_obstack, 0, 0,
- objfile -> xmalloc, objfile -> free);
+ 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;
+ }
- /* Push this file onto the head of the linked list of other such files. */
+ /* 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;
- objfile -> next = object_files;
- object_files = objfile;
+ /* Record whether this objfile definitely represents a solib. */
+ objfile->is_solib = is_solib;
return (objfile);
}
-
-/* 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. */
+/* Put OBJFILE at the front of the list. */
void
-free_objfile (objfile)
+objfile_to_front (objfile)
struct objfile *objfile;
{
- struct objfile *ofp;
-
- if (objfile -> name)
+ struct objfile **objp;
+ for (objp = &object_files; *objp != NULL; objp = &((*objp)->next))
{
- (*objfile -> free) (objfile -> name);
+ 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;
+ }
}
- if (objfile -> obfd)
+}
+
+/* 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))
{
- bfd_close (objfile -> obfd);
+ 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
- /* Remove it from the chain of all objfiles. */
+ 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. */
- if (object_files == objfile)
+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)
{
- object_files = objfile -> next;
+ (*objfile->sf->sym_finish) (objfile);
}
- else
+
+ /* We always close the bfd. */
+
+ if (objfile->obfd != NULL)
{
- for (ofp = object_files; ofp; ofp = ofp -> next)
- {
- if (ofp -> next == objfile)
- {
- ofp -> next = objfile -> next;
- }
- }
+ 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);
}
- obstack_free (&objfile -> psymbol_obstack, 0);
- obstack_free (&objfile -> symbol_obstack, 0);
- obstack_free (&objfile -> type_obstack, 0);
+ /* Remove it from the chain of all objfiles. */
-#if 0 /* FIXME!! */
+ 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
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. */
-
- clear_symtab_users_once ();
+
#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 ();
-#endif
+ /* 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) */
- /* The last thing we do is free the objfile struct itself, using the
- free() that is appropriate for the objfile. */
+ /* If we still have an objfile, then either we don't support reusable
+ objfiles or this one was not reusable. So free it normally. */
- (*objfile -> free) (objfile);
+ 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. */
+/* 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 ();
+}
+\f
+/* 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)
{
- free_objfile (objfile);
+ 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 ();
+}
+\f
/* 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. */
have_partial_symbols ()
{
struct objfile *ofp;
- int havethem = 0;
- for (ofp = object_files; ofp; ofp = ofp -> next)
- {
- if (ofp -> psymtabs != NULL)
- {
- havethem++;
- break;
- }
- }
- return (havethem);
+ 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
have_full_symbols ()
{
struct objfile *ofp;
- int havethem = 0;
- for (ofp = object_files; ofp; ofp = ofp -> next)
- {
- if (ofp -> symtabs != NULL)
- {
- havethem++;
- break;
- }
- }
- return (havethem);
+ 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. */
have_minimal_symbols ()
{
struct objfile *ofp;
- int havethem = 0;
- for (ofp = object_files; ofp; ofp = ofp -> next)
+ 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 (ofp -> msymbols != NULL)
+ if (sbuf.st_mtime < mtime)
{
- havethem++;
- break;
+ 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 (havethem);
+ return (fd);
}
-/* Call the function specified by FUNC for each currently available objfile,
- for as long as this function continues to return NULL. If the function
- ever returns non-NULL, then the iteration over the objfiles is terminated,
- and the result is returned to the caller. The function called has full
- control over the form and content of the information returned via the
- non-NULL result, which may be as simple as a pointer to the objfile that
- the iteration terminated on, or as complex as a pointer to a private
- structure containing multiple results. */
-
-PTR
-iterate_over_objfiles (func, arg1, arg2, arg3)
- PTR (*func) PARAMS ((struct objfile *, PTR, PTR, PTR));
- PTR arg1;
- PTR arg2;
- PTR arg3;
+/* 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;
{
- register struct objfile *objfile;
- PTR result = NULL;
+ 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. */
- for (objfile = object_files;
- objfile != NULL && result == NULL;
- objfile = objfile -> next)
+ symsfilename = concat ("./", basename (filename), ".syms", (char *) NULL);
+ if ((fd = open_existing_mapped_file (symsfilename, mtime, mapped)) < 0)
{
- result = (*func)(objfile, arg1, arg2, arg3);
+ free (symsfilename);
+ symsfilename = concat (filename, ".syms", (char *) NULL);
+ fd = open_existing_mapped_file (symsfilename, mtime, mapped);
}
- return (result);
-}
-/* Call the function specified by FUNC for each currently available symbol
- table, for as long as this function continues to return NULL. If the
- function ever returns non-NULL, then the iteration over the symbol tables
- is terminated, and the result is returned to the caller. The function
- called has full control over the form and content of the information
- returned via the non-NULL result, which may be as simple as a pointer
- to the symtab that the iteration terminated on, or as complex as a
- pointer to a private structure containing multiple results. */
-
-PTR
-iterate_over_symtabs (func, arg1, arg2, arg3)
- PTR (*func) PARAMS ((struct objfile *, struct symtab *, PTR, PTR, PTR));
- PTR arg1;
- PTR arg2;
- PTR arg3;
-{
- register struct objfile *objfile;
- register struct symtab *symtab;
- PTR result = NULL;
+ /* 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.
- for (objfile = object_files;
- objfile != NULL && result == NULL;
- objfile = objfile -> next)
+ 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)
{
- for (symtab = objfile -> symtabs;
- symtab != NULL && result == NULL;
- symtab = symtab -> next)
+ free (symsfilename);
+ symsfilename = concat ("./", basename (filename), ".syms",
+ (char *) NULL);
+ if ((fd = open (symsfilename, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0)
{
- result = (*func)(objfile, symtab, arg1, arg2, arg3);
+ if (error_pre_print)
+ {
+ printf_unfiltered (error_pre_print);
+ }
+ print_sys_errmsg (symsfilename, errno);
}
}
- return (result);
+
+ free (symsfilename);
+ return (fd);
}
-/* Call the function specified by FUNC for each currently available partial
- symbol table, for as long as this function continues to return NULL. If
- the function ever returns non-NULL, then the iteration over the partial
- symbol tables is terminated, and the result is returned to the caller.
-
- The function called has full control over the form and content of the
- information returned via the non-NULL result, which may be as simple as a
- pointer to the partial symbol table that the iteration terminated on, or
- as complex as a pointer to a private structure containing multiple
- results. */
-
-PTR
-iterate_over_psymtabs (func, arg1, arg2, arg3)
- PTR (*func) PARAMS ((struct objfile *, struct partial_symtab *,
- PTR, PTR, PTR));
- PTR arg1;
- PTR arg2;
- PTR arg3;
+static PTR
+map_to_file (fd)
+ int fd;
{
- register struct objfile *objfile;
- register struct partial_symtab *psymtab;
- PTR result = NULL;
+ PTR md;
+ CORE_ADDR mapto;
- for (objfile = object_files;
- objfile != NULL && result == NULL;
- objfile = objfile -> next)
+ md = mmalloc_attach (fd, (PTR) 0);
+ if (md != NULL)
{
- for (psymtab = objfile -> psymtabs;
- psymtab != NULL && result == NULL;
- psymtab = psymtab -> next)
+ 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)
{
- result = (*func)(objfile, psymtab, arg1, arg2, arg3);
+ /* 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 (result);
+ 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 ((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 (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;
+}
+
projects / deliverable / binutils-gdb.git / blobdiff