/* GDB routines for manipulating objfiles.
- Copyright 1992 Free Software Foundation, Inc.
+
+ Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002, 2003 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 "symtab.h"
#include "symfile.h"
#include "objfiles.h"
+#include "gdb-stabs.h"
+#include "target.h"
+#include "bcache.h"
+#include "gdb_assert.h"
#include <sys/types.h>
-#include <sys/stat.h>
+#include "gdb_stat.h"
#include <fcntl.h>
-#include <obstack.h>
+#include "gdb_obstack.h"
+#include "gdb_string.h"
+#include "hashtab.h"
-/* Prototypes for local functions */
+#include "breakpoint.h"
+#include "block.h"
+#include "dictionary.h"
-static int
-open_mapped_file PARAMS ((char *filename, long mtime, int mapped));
+/* Prototypes for local functions */
-static CORE_ADDR
-map_to_address PARAMS ((void));
+static void objfile_alloc_data (struct objfile *objfile);
+static void objfile_free_data (struct objfile *objfile);
/* Externally visible variables that are owned by this module.
See declarations in objfile.h for more info. */
-struct objfile *object_files; /* Linked list of all objfiles */
+struct objfile *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. */
-/* 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. */
+#ifndef TARGET_KEEP_SECTION
+#define TARGET_KEEP_SECTION(ASECT) 0
+#endif
-struct objfile *
-allocate_objfile (abfd, mapped)
- bfd *abfd;
- int mapped;
+/* Called via bfd_map_over_sections to build up the section table that
+ the objfile references. The objfile contains pointers to the start
+ of the table (objfile->sections) and to the first location after
+ the end of the table (objfile->sections_end). */
+
+static void
+add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect,
+ void *objfile_p_char)
{
- struct objfile *objfile = NULL;
- int fd;
- void *md;
- CORE_ADDR mapto;
-
- mapped |= mapped_symbol_files;
-
-#if !defined(NO_MMALLOC) && defined(HAVE_MMAP)
-
- /* 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. */
-
- fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd),
- mapped);
- if (fd >= 0)
- {
- if (((mapto = map_to_address ()) == 0) ||
- ((md = mmalloc_attach (fd, (void *) mapto)) == NULL))
- {
- (void) 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_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);
- }
- 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));
- (void) memset (objfile, 0, sizeof (struct objfile));
- objfile -> md = md;
- objfile -> mmfd = fd;
- objfile -> flags |= OBJF_MAPPED;
- mmalloc_setkey (objfile -> md, 0, objfile);
- obstack_full_begin (&objfile -> psymbol_obstack, 0, 0,
- xmmalloc, mfree, objfile -> md,
- OBSTACK_MMALLOC_LIKE);
- obstack_full_begin (&objfile -> symbol_obstack, 0, 0,
- xmmalloc, mfree, objfile -> md,
- OBSTACK_MMALLOC_LIKE);
- obstack_full_begin (&objfile -> type_obstack, 0, 0,
- xmmalloc, mfree, objfile -> md,
- OBSTACK_MMALLOC_LIKE);
- }
- }
+ 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);
+}
- if (mapped && (objfile == NULL))
- {
- warning ("symbol table for '%s' will not be mapped",
- bfd_get_filename (abfd));
- }
+/* Builds a section table for OBJFILE.
+ Returns 0 if OK, 1 on error (in which case bfd_error contains the
+ error).
-#else /* defined(NO_MMALLOC) || !defined(HAVE_MMAP) */
+ 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.
- if (mapped)
- {
- warning ("this version of gdb does not support mapped symbol tables.");
+ Also note that the OFFSET and OVLY_MAPPED in each table entry
+ are initialized to zero.
- /* 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. */
+ Also note that if anything else writes to the psymbol obstack while
+ we are building the table, we're pretty much hosed. */
- mapped_symbol_files = 0;
- }
+int
+build_objfile_section_table (struct objfile *objfile)
+{
+ /* objfile->sections can be already set when reading a mapped symbol
+ file. I believe that we do need to rebuild the section table in
+ this case (we rebuild other things derived from the bfd), but we
+ can't free the old one (it's in the 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 some flag bits
+ allocate a new objfile struct, fill it in as best we can, link it
+ into the list of all known objfiles, and return a pointer to the
+ new objfile struct.
-#endif /* !defined(NO_MMALLOC) && defined(HAVE_MMAP) */
+ The FLAGS word contains various bits (OBJF_*) that can be taken as
+ requests for specific operations. Other bits like OBJF_SHARED are
+ simply copied through to the new objfile flags member. */
+
+/* NOTE: carlton/2003-02-04: This function is called with args NULL, 0
+ by jv-lang.c, to create an artificial objfile used to hold
+ information about dynamically-loaded Java classes. Unfortunately,
+ that branch of this function doesn't get tested very frequently, so
+ it's prone to breakage. (E.g. at one time the name was set to NULL
+ in that situation, which broke a loop over all names in the dynamic
+ library loader.) If you change this function, please try to leave
+ things in a consistent state even if abfd is NULL. */
+
+struct objfile *
+allocate_objfile (bfd *abfd, int flags)
+{
+ struct objfile *objfile = NULL;
+ struct objfile *last_one = NULL;
/* If we don't support mapped symbol files, didn't ask for the file to be
mapped, or failed to open the mapped file for some reason, then revert
if (objfile == NULL)
{
objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
- (void) memset (objfile, 0, sizeof (struct objfile));
- objfile -> md = NULL;
- obstack_full_begin (&objfile -> psymbol_obstack, 0, 0, xmalloc, free,
- (void *) 0, 0);
- obstack_full_begin (&objfile -> symbol_obstack, 0, 0, xmalloc, free,
- (void *) 0, 0);
- obstack_full_begin (&objfile -> type_obstack, 0, 0, xmalloc, free,
- (void *) 0, 0);
-
+ memset (objfile, 0, sizeof (struct objfile));
+ objfile->md = NULL;
+ objfile->psymbol_cache = bcache_xmalloc ();
+ objfile->macro_cache = bcache_xmalloc ();
+ obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, xmalloc,
+ xfree);
+ obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, xmalloc,
+ xfree);
+ obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc,
+ xfree);
+
+ terminate_minimal_symbol_table (objfile);
}
+ objfile_alloc_data (objfile);
+
/* Update the per-objfile information that comes from the bfd, ensuring
that any data that is reference is saved in the per-objfile data
region. */
- objfile -> obfd = abfd;
- if (objfile -> name != NULL)
+ objfile->obfd = abfd;
+ if (objfile->name != NULL)
{
- mfree (objfile -> md, objfile -> name);
+ xmfree (objfile->md, objfile->name);
}
- objfile -> name = mstrsave (objfile -> md, bfd_get_filename (abfd));
- objfile -> mtime = bfd_get_mtime (abfd);
+ if (abfd != NULL)
+ {
+ objfile->name = mstrsave (objfile->md, bfd_get_filename (abfd));
+ objfile->mtime = bfd_get_mtime (abfd);
- /* Push this file onto the head of the linked list of other such files. */
+ /* Build section table. */
- objfile -> next = object_files;
- object_files = objfile;
+ if (build_objfile_section_table (objfile))
+ {
+ error ("Can't find the file sections in `%s': %s",
+ objfile->name, bfd_errmsg (bfd_get_error ()));
+ }
+ }
+ else
+ {
+ objfile->name = mstrsave (objfile->md, "<<anonymous objfile>>");
+ }
+
+ /* Initialize the section indexes for this objfile, so that we can
+ later detect if they are used w/o being properly assigned to. */
+
+ objfile->sect_index_text = -1;
+ objfile->sect_index_data = -1;
+ objfile->sect_index_bss = -1;
+ objfile->sect_index_rodata = -1;
+
+ /* We don't yet have a C++-specific namespace symtab. */
+
+ objfile->cp_namespace_symtab = NULL;
+
+ /* Add this file onto the tail of the linked list of other such files. */
+
+ objfile->next = NULL;
+ if (object_files == NULL)
+ object_files = objfile;
+ else
+ {
+ for (last_one = object_files;
+ last_one->next;
+ last_one = last_one->next);
+ last_one->next = objfile;
+ }
+
+ /* Save passed in flag bits. */
+ objfile->flags |= flags;
return (objfile);
}
+/* Create the terminating entry of OBJFILE's minimal symbol table.
+ If OBJFILE->msymbols is zero, allocate a single entry from
+ OBJFILE->symbol_obstack; otherwise, just initialize
+ OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
+void
+terminate_minimal_symbol_table (struct objfile *objfile)
+{
+ if (! objfile->msymbols)
+ objfile->msymbols = ((struct minimal_symbol *)
+ obstack_alloc (&objfile->symbol_obstack,
+ sizeof (objfile->msymbols[0])));
+
+ {
+ struct minimal_symbol *m
+ = &objfile->msymbols[objfile->minimal_symbol_count];
+
+ memset (m, 0, sizeof (*m));
+ DEPRECATED_SYMBOL_NAME (m) = NULL;
+ SYMBOL_VALUE_ADDRESS (m) = 0;
+ MSYMBOL_INFO (m) = NULL;
+ MSYMBOL_SIZE (m) = 0;
+ MSYMBOL_TYPE (m) = mst_unknown;
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown);
+ }
+}
+
+
+/* Put one object file before a specified on in the global list.
+ This can be used to make sure an object file is destroyed before
+ another when using ALL_OBJFILES_SAFE to free all objfiles. */
+void
+put_objfile_before (struct objfile *objfile, struct objfile *before_this)
+{
+ struct objfile **objp;
+
+ unlink_objfile (objfile);
+
+ for (objp = &object_files; *objp != NULL; objp = &((*objp)->next))
+ {
+ if (*objp == before_this)
+ {
+ objfile->next = *objp;
+ *objp = objfile;
+ return;
+ }
+ }
+
+ internal_error (__FILE__, __LINE__,
+ "put_objfile_before: before objfile not in list");
+}
+
+/* Put OBJFILE at the front of the list. */
+
+void
+objfile_to_front (struct objfile *objfile)
+{
+ struct objfile **objp;
+ for (objp = &object_files; *objp != NULL; objp = &((*objp)->next))
+ {
+ if (*objp == objfile)
+ {
+ /* Unhook it from where it is. */
+ *objp = objfile->next;
+ /* Put it in the front. */
+ objfile->next = object_files;
+ object_files = objfile;
+ break;
+ }
+ }
+}
+
+/* Unlink OBJFILE from the list of known objfiles, if it is found in the
+ list.
+
+ It is not a bug, or error, to call this function if OBJFILE is not known
+ to be in the current list. This is done in the case of mapped objfiles,
+ for example, just to ensure that the mapped objfile doesn't appear twice
+ in the list. Since the list is threaded, linking in a mapped objfile
+ twice would create a circular list.
+
+ If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
+ unlinking it, just to ensure that we have completely severed any linkages
+ between the OBJFILE and the list. */
+
+void
+unlink_objfile (struct objfile *objfile)
+{
+ struct objfile **objpp;
+
+ for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp)->next))
+ {
+ if (*objpp == objfile)
+ {
+ *objpp = (*objpp)->next;
+ objfile->next = NULL;
+ return;
+ }
+ }
+
+ internal_error (__FILE__, __LINE__,
+ "unlink_objfile: objfile already unlinked");
+}
+
+
/* Destroy an objfile and all the symtabs and psymtabs under it. Note
that as much as possible is allocated on the 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
+ 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
we free objects in the reusable area. */
void
-free_objfile (objfile)
- struct objfile *objfile;
+free_objfile (struct objfile *objfile)
{
- struct objfile *ofp;
- int mmfd;
-
+ if (objfile->separate_debug_objfile)
+ {
+ free_objfile (objfile->separate_debug_objfile);
+ }
+
+ if (objfile->separate_debug_objfile_backlink)
+ {
+ /* We freed the separate debug file, make sure the base objfile
+ doesn't reference it. */
+ objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL;
+ }
+
/* 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
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)
+ if (objfile->sf != NULL)
{
- (*objfile -> sf -> sym_finish) (objfile);
+ (*objfile->sf->sym_finish) (objfile);
}
/* We always close the bfd. */
- if (objfile -> obfd != NULL)
+ if (objfile->obfd != NULL)
{
- bfd_close (objfile -> obfd);
+ char *name = bfd_get_filename (objfile->obfd);
+ if (!bfd_close (objfile->obfd))
+ warning ("cannot close \"%s\": %s",
+ name, bfd_errmsg (bfd_get_error ()));
+ xfree (name);
}
/* Remove it from the chain of all objfiles. */
- if (object_files == objfile)
- {
- object_files = objfile -> next;
- }
- else
- {
- for (ofp = object_files; ofp; ofp = ofp -> next)
- {
- if (ofp -> next == objfile)
- {
- ofp -> next = objfile -> next;
- break;
- }
- }
- }
- objfile -> next = NULL;
+ unlink_objfile (objfile);
+
+ /* If we are going to free the runtime common objfile, mark it
+ as unallocated. */
-#if 0 /* FIXME!! */
+ 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 ();
-#endif
- clear_pc_function_cache ();
-#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. */
+ /* The last thing we do is free the objfile struct itself. */
- if (objfile -> flags & OBJF_MAPPED)
+ objfile_free_data (objfile);
+ if (objfile->name != NULL)
{
- /* 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. */
- mmfd = objfile -> mmfd;
- mmalloc_detach (objfile -> md);
- (void) close (mmfd);
- }
- else
- {
- if (objfile -> name != NULL)
- {
- mfree (objfile -> md, objfile -> name);
- }
- /* Free the obstacks for non-reusable objfiles */
- obstack_free (&objfile -> psymbol_obstack, 0);
- obstack_free (&objfile -> symbol_obstack, 0);
- obstack_free (&objfile -> type_obstack, 0);
- mfree (objfile -> md, objfile);
+ xmfree (objfile->md, objfile->name);
}
+ if (objfile->global_psymbols.list)
+ xmfree (objfile->md, objfile->global_psymbols.list);
+ if (objfile->static_psymbols.list)
+ xmfree (objfile->md, objfile->static_psymbols.list);
+ /* Free the obstacks for non-reusable objfiles */
+ bcache_xfree (objfile->psymbol_cache);
+ bcache_xfree (objfile->macro_cache);
+ if (objfile->demangled_names_hash)
+ htab_delete (objfile->demangled_names_hash);
+ obstack_free (&objfile->psymbol_obstack, 0);
+ obstack_free (&objfile->symbol_obstack, 0);
+ obstack_free (&objfile->type_obstack, 0);
+ xmfree (objfile->md, objfile);
+ objfile = NULL;
+}
+
+static void
+do_free_objfile_cleanup (void *obj)
+{
+ free_objfile (obj);
}
+struct cleanup *
+make_cleanup_free_objfile (struct objfile *obj)
+{
+ return make_cleanup (do_free_objfile_cleanup, obj);
+}
-/* Free all the object files at once. */
+/* Free all the object files at once and clean up their users. */
void
-free_all_objfiles ()
+free_all_objfiles (void)
{
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 (struct objfile *objfile, struct section_offsets *new_offsets)
+{
+ struct section_offsets *delta =
+ ((struct section_offsets *)
+ alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)));
+
+ {
+ int i;
+ int something_changed = 0;
+ for (i = 0; i < objfile->num_sections; ++i)
+ {
+ delta->offsets[i] =
+ ANOFFSET (new_offsets, i) - ANOFFSET (objfile->section_offsets, i);
+ if (ANOFFSET (delta, i) != 0)
+ something_changed = 1;
+ }
+ if (!something_changed)
+ return;
+ }
+
+ /* OK, get all the symtabs. */
+ {
+ struct symtab *s;
+
+ ALL_OBJFILE_SYMTABS (objfile, s)
{
- free_objfile (objfile);
+ struct linetable *l;
+ struct blockvector *bv;
+ int i;
+
+ /* First the line table. */
+ l = LINETABLE (s);
+ if (l)
+ {
+ for (i = 0; i < l->nitems; ++i)
+ l->item[i].pc += ANOFFSET (delta, s->block_line_section);
+ }
+
+ /* Don't relocate a shared blockvector more than once. */
+ if (!s->primary)
+ continue;
+
+ bv = BLOCKVECTOR (s);
+ for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv); ++i)
+ {
+ struct block *b;
+ struct symbol *sym;
+ struct dict_iterator iter;
+
+ b = BLOCKVECTOR_BLOCK (bv, i);
+ BLOCK_START (b) += ANOFFSET (delta, s->block_line_section);
+ BLOCK_END (b) += ANOFFSET (delta, s->block_line_section);
+
+ ALL_BLOCK_SYMBOLS (b, iter, sym)
+ {
+ fixup_symbol_section (sym, objfile);
+
+ /* The RS6000 code from which this was taken skipped
+ any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN.
+ But I'm leaving out that test, on the theory that
+ they can't possibly pass the tests below. */
+ if ((SYMBOL_CLASS (sym) == LOC_LABEL
+ || SYMBOL_CLASS (sym) == LOC_STATIC
+ || SYMBOL_CLASS (sym) == LOC_INDIRECT)
+ && SYMBOL_SECTION (sym) >= 0)
+ {
+ SYMBOL_VALUE_ADDRESS (sym) +=
+ ANOFFSET (delta, SYMBOL_SECTION (sym));
+ }
+#ifdef MIPS_EFI_SYMBOL_NAME
+ /* Relocate Extra Function Info for ecoff. */
+
+ else if (SYMBOL_CLASS (sym) == LOC_CONST
+ && SYMBOL_DOMAIN (sym) == LABEL_DOMAIN
+ && strcmp (DEPRECATED_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 (objfile));
+ p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ }
+ }
+
+ {
+ struct partial_symbol **psym;
+
+ for (psym = objfile->global_psymbols.list;
+ psym < objfile->global_psymbols.next;
+ psym++)
+ {
+ fixup_psymbol_section (*psym, objfile);
+ if (SYMBOL_SECTION (*psym) >= 0)
+ SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta,
+ SYMBOL_SECTION (*psym));
+ }
+ for (psym = objfile->static_psymbols.list;
+ psym < objfile->static_psymbols.next;
+ psym++)
+ {
+ fixup_psymbol_section (*psym, objfile);
+ if (SYMBOL_SECTION (*psym) >= 0)
+ SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta,
+ SYMBOL_SECTION (*psym));
+ }
+ }
+
+ {
+ struct minimal_symbol *msym;
+ ALL_OBJFILE_MSYMBOLS (objfile, msym)
+ if (SYMBOL_SECTION (msym) >= 0)
+ SYMBOL_VALUE_ADDRESS (msym) += ANOFFSET (delta, SYMBOL_SECTION (msym));
+ }
+ /* Relocating different sections by different amounts may cause the symbols
+ to be out of order. */
+ msymbols_sort (objfile);
+
+ {
+ int i;
+ for (i = 0; i < objfile->num_sections; ++i)
+ (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i);
+ }
+
+ if (objfile->ei.entry_point != ~(CORE_ADDR) 0)
+ {
+ /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT
+ only as a fallback. */
+ struct obj_section *s;
+ s = find_pc_section (objfile->ei.entry_point);
+ if (s)
+ objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index);
+ else
+ objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ }
+
+ {
+ struct obj_section *s;
+ bfd *abfd;
+
+ abfd = objfile->obfd;
+
+ ALL_OBJFILE_OSECTIONS (objfile, s)
+ {
+ int idx = s->the_bfd_section->index;
+
+ s->addr += ANOFFSET (delta, idx);
+ s->endaddr += ANOFFSET (delta, idx);
+ }
+ }
+
+ if (objfile->ei.entry_func_lowpc != INVALID_ENTRY_LOWPC)
+ {
+ objfile->ei.entry_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ objfile->ei.entry_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ }
+
+ if (objfile->ei.deprecated_entry_file_lowpc != INVALID_ENTRY_LOWPC)
+ {
+ objfile->ei.deprecated_entry_file_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ objfile->ei.deprecated_entry_file_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ }
+
+ if (objfile->ei.main_func_lowpc != INVALID_ENTRY_LOWPC)
+ {
+ objfile->ei.main_func_lowpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ objfile->ei.main_func_highpc += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
+ }
+
+ /* 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. */
int
-have_partial_symbols ()
+have_partial_symbols (void)
{
struct objfile *ofp;
ALL_OBJFILES (ofp)
- {
- if (ofp -> psymtabs != NULL)
- {
- return 1;
- }
- }
+ {
+ if (ofp->psymtabs != NULL)
+ {
+ return 1;
+ }
+ }
return 0;
}
available, nonzero otherwise. */
int
-have_full_symbols ()
+have_full_symbols (void)
{
struct objfile *ofp;
ALL_OBJFILES (ofp)
- {
- if (ofp -> symtabs != NULL)
- {
- return 1;
- }
- }
+ {
+ if (ofp->symtabs != NULL)
+ {
+ return 1;
+ }
+ }
return 0;
}
+
+/* This operations deletes all objfile entries that represent solibs that
+ weren't explicitly loaded by the user, via e.g., the add-symbol-file
+ command.
+ */
+void
+objfile_purge_solibs (void)
+{
+ struct objfile *objf;
+ struct objfile *temp;
+
+ ALL_OBJFILES_SAFE (objf, temp)
+ {
+ /* We assume that the solib package has been purged already, or will
+ be soon.
+ */
+ if (!(objf->flags & OBJF_USERLOADED) && (objf->flags & OBJF_SHARED))
+ free_objfile (objf);
+ }
+}
+
+
/* Many places in gdb want to test just to see if we have any minimal
symbols available. This function returns zero if none are currently
available, nonzero otherwise. */
int
-have_minimal_symbols ()
+have_minimal_symbols (void)
{
struct objfile *ofp;
ALL_OBJFILES (ofp)
- {
- if (ofp -> msymbols != NULL)
- {
- return 1;
- }
- }
+ {
+ if (ofp->minimal_symbol_count > 0)
+ {
+ return 1;
+ }
+ }
return 0;
}
-/* 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.
+/* Returns a section whose range includes PC and SECTION, or NULL if
+ none found. Note the distinction between the return type, struct
+ obj_section (which is defined in gdb), and the input type "struct
+ bfd_section" (which is a bfd-defined data type). The obj_section
+ contains a pointer to the "struct bfd_section". */
- 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. */
-
-static int
-open_mapped_file (filename, mtime, mapped)
- char *filename;
- long mtime;
- int mapped;
+struct obj_section *
+find_pc_sect_section (CORE_ADDR pc, struct bfd_section *section)
{
- int fd;
- char *symfilename;
- struct stat sbuf;
+ struct obj_section *s;
+ struct objfile *objfile;
- /* For now, all we do is look in the local directory for a file with
- the name of the base file and an extension of ".syms" */
+ ALL_OBJSECTIONS (objfile, s)
+ if ((section == 0 || section == s->the_bfd_section) &&
+ s->addr <= pc && pc < s->endaddr)
+ return (s);
- symfilename = concat ("./", basename (filename), ".syms", (char *) NULL);
+ return (NULL);
+}
- /* Check to see if the desired file already exists and is more recent than
- the corresponding base file (specified by the passed MTIME parameter).
- The open will fail if the file does not already exist. */
+/* Returns a section whose range includes PC or NULL if none found.
+ Backward compatibility, no section. */
- if ((fd = open (symfilename, O_RDWR)) >= 0)
- {
- if (fstat (fd, &sbuf) != 0)
- {
- (void) close (fd);
- perror_with_name (symfilename);
- }
- else if (sbuf.st_mtime > mtime)
- {
- return (fd);
- }
- else
- {
- (void) close (fd);
- fd = -1;
- }
- }
+struct obj_section *
+find_pc_section (CORE_ADDR pc)
+{
+ return find_pc_sect_section (pc, find_pc_mapped_section (pc));
+}
- /* 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.
- In the case where there is an existing file, but it is out of date, and
- the user did not specify mapped, the existing file is just silently
- ignored. Perhaps we should warn about this case (FIXME?).
+/* 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. */
- By default the file is rw for everyone, with the user's umask taking
- care of turning off the permissions the user wants off. */
+int
+in_plt_section (CORE_ADDR pc, char *name)
+{
+ struct obj_section *s;
+ int retval = 0;
- if (mapped)
- {
- fd = open (symfilename, O_RDWR | O_CREAT | O_TRUNC, 0666);
- }
+ s = find_pc_section (pc);
- return (fd);
+ retval = (s != NULL
+ && s->the_bfd_section->name != NULL
+ && strcmp (s->the_bfd_section->name, ".plt") == 0);
+ return (retval);
}
-/* Return the base address at which we would like the next objfile's
- mapped data to start.
+/* Return nonzero if NAME is in the import list of OBJFILE. Else
+ return zero. */
- For now, we use the kludge that the configuration specifies a base
- address to which it is safe to map the first mmalloc heap, and an
- increment to add to this address for each successive heap. There are
- a lot of issues to deal with here to make this work reasonably, including:
-
- Avoid memory collisions with existing mapped address spaces
+int
+is_in_import_list (char *name, struct objfile *objfile)
+{
+ int i;
- Reclaim address spaces when their mmalloc heaps are unmapped
+ if (!objfile || !name || !*name)
+ return 0;
- When mmalloc heaps are shared between processes they have to be
- mapped at the same addresses in each
+ for (i = 0; i < objfile->import_list_size; i++)
+ if (objfile->import_list[i] && DEPRECATED_STREQ (name, objfile->import_list[i]))
+ return 1;
+ return 0;
+}
+\f
- Once created, a mmalloc heap that is to be mapped back in must be
- mapped at the original address. I.E. each objfile will expect to
- be remapped at it's original address. This becomes a problem if
- the desired address is already in use.
+/* Keep a registry of per-objfile data-pointers required by other GDB
+ modules. */
- etc, etc, etc.
+struct objfile_data
+{
+ unsigned index;
+};
- */
+struct objfile_data_registration
+{
+ struct objfile_data *data;
+ struct objfile_data_registration *next;
+};
+
+struct objfile_data_registry
+{
+ struct objfile_data_registration *registrations;
+ unsigned num_registrations;
+};
+static struct objfile_data_registry objfile_data_registry = { NULL, 0 };
-static CORE_ADDR
-map_to_address ()
+const struct objfile_data *
+register_objfile_data (void)
{
+ struct objfile_data_registration **curr;
+
+ /* Append new registration. */
+ for (curr = &objfile_data_registry.registrations;
+ *curr != NULL; curr = &(*curr)->next);
-#if defined(MMAP_BASE_ADDRESS) && defined (MMAP_INCREMENT)
+ *curr = XMALLOC (struct objfile_data_registration);
+ (*curr)->next = NULL;
+ (*curr)->data = XMALLOC (struct objfile_data);
+ (*curr)->data->index = objfile_data_registry.num_registrations++;
- static CORE_ADDR next = MMAP_BASE_ADDRESS;
- CORE_ADDR mapto = next;
+ return (*curr)->data;
+}
- next += MMAP_INCREMENT;
- return (mapto);
+static void
+objfile_alloc_data (struct objfile *objfile)
+{
+ gdb_assert (objfile->data == NULL);
+ objfile->num_data = objfile_data_registry.num_registrations;
+ objfile->data = XCALLOC (objfile->num_data, void *);
+}
-#else
+static void
+objfile_free_data (struct objfile *objfile)
+{
+ gdb_assert (objfile->data != NULL);
+ xfree (objfile->data);
+ objfile->data = NULL;
+}
- return (0);
+void
+clear_objfile_data (struct objfile *objfile)
+{
+ gdb_assert (objfile->data != NULL);
+ memset (objfile->data, 0, objfile->num_data * sizeof (void *));
+}
-#endif
+void
+set_objfile_data (struct objfile *objfile, const struct objfile_data *data,
+ void *value)
+{
+ gdb_assert (data->index < objfile->num_data);
+ objfile->data[data->index] = value;
+}
+void *
+objfile_data (struct objfile *objfile, const struct objfile_data *data)
+{
+ gdb_assert (data->index < objfile->num_data);
+ return objfile->data[data->index];
}
projects / deliverable / binutils-gdb.git / blobdiff