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-rw-r--r--gdb/objfiles.c988
1 files changed, 0 insertions, 988 deletions
diff --git a/gdb/objfiles.c b/gdb/objfiles.c
deleted file mode 100644
index 971a7d4..0000000
--- a/gdb/objfiles.c
+++ /dev/null
@@ -1,988 +0,0 @@
-/* GDB routines for manipulating objfiles.
- Copyright 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
- Contributed by Cygnus Support, using pieces from other GDB modules.
-
-This file is part of GDB.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-/* This file contains support routines for creating, manipulating, and
- destroying objfile structures. */
-
-#include "defs.h"
-#include "bfd.h" /* Binary File Description */
-#include "symtab.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "gdb-stabs.h"
-#include "target.h"
-
-#include <sys/types.h>
-#include "gdb_stat.h"
-#include <fcntl.h>
-#include "obstack.h"
-#include "gdb_string.h"
-
-/* Prototypes for local functions */
-
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
-
-static int
-open_existing_mapped_file PARAMS ((char *, long, int));
-
-static int
-open_mapped_file PARAMS ((char *filename, long mtime, int mapped));
-
-static PTR
-map_to_file PARAMS ((int));
-
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
-
-static void
-add_to_objfile_sections PARAMS ((bfd *, sec_ptr, PTR));
-
-/* Externally visible variables that are owned by this module.
- See declarations in objfile.h for more info. */
-
-struct objfile *object_files; /* Linked list of all objfiles */
-struct objfile *current_objfile; /* For symbol file being read in */
-struct objfile *symfile_objfile; /* Main symbol table loaded from */
-struct objfile *rt_common_objfile; /* For runtime common symbols */
-
-int mapped_symbol_files; /* Try to use mapped symbol files */
-
-/* Locate all mappable sections of a BFD file.
- objfile_p_char is a char * to get it through
- bfd_map_over_sections; we cast it back to its proper type. */
-
-#ifndef TARGET_KEEP_SECTION
-#define TARGET_KEEP_SECTION(ASECT) 0
-#endif
-
-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 *) &section, 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). */
-
-int
-build_objfile_section_table (objfile)
- struct objfile *objfile;
-{
- /* objfile->sections can be already set when reading a mapped symbol
- file. I believe that we do need to rebuild the section table in
- this case (we rebuild other things derived from the bfd), but we
- can't free the old one (it's in the psymbol_obstack). So we just
- waste some memory. */
-
- objfile->sections_end = 0;
- bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *)objfile);
- objfile->sections = (struct obj_section *)
- obstack_finish (&objfile->psymbol_obstack);
- objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end;
- return(0);
-}
-
-/* Given a pointer to an initialized bfd (ABFD) and a flag that indicates
- whether or not an objfile is to be mapped (MAPPED), allocate a new objfile
- struct, fill it in as best we can, link it into the list of all known
- objfiles, and return a pointer to the new objfile struct.
-
- USER_LOADED is simply recorded in the objfile. This record offers a way for
- run_command to remove old objfile entries which are no longer valid (i.e.,
- are associated with an old inferior), but to preserve ones that the user
- explicitly loaded via the add-symbol-file command.
-
- IS_SOLIB is also simply recorded in the objfile. */
-
-struct objfile *
-allocate_objfile (abfd, mapped, user_loaded, is_solib)
- bfd *abfd;
- int mapped;
- int user_loaded;
- int is_solib;
-{
- struct objfile *objfile = NULL;
- struct objfile *last_one = NULL;
-
- mapped |= mapped_symbol_files;
-
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
- if (abfd != NULL)
- {
-
- /* If we can support mapped symbol files, try to open/reopen the
- mapped file that corresponds to the file from which we wish to
- read symbols. If the objfile is to be mapped, we must malloc
- the structure itself using the mmap version, and arrange that
- all memory allocation for the objfile uses the mmap routines.
- If we are reusing an existing mapped file, from which we get
- our objfile pointer, we have to make sure that we update the
- pointers to the alloc/free functions in the obstack, in case
- these functions have moved within the current gdb. */
-
- int fd;
-
- fd = open_mapped_file (bfd_get_filename (abfd), bfd_get_mtime (abfd),
- mapped);
- if (fd >= 0)
- {
- PTR md;
-
- if ((md = map_to_file (fd)) == NULL)
- {
- close (fd);
- }
- else if ((objfile = (struct objfile *) mmalloc_getkey (md, 0)) != NULL)
- {
- /* Update memory corruption handler function addresses. */
- init_malloc (md);
- objfile -> md = md;
- objfile -> mmfd = fd;
- /* Update pointers to functions to *our* copies */
- obstack_chunkfun (&objfile -> psymbol_cache.cache, xmmalloc);
- obstack_freefun (&objfile -> psymbol_cache.cache, mfree);
- obstack_chunkfun (&objfile -> psymbol_obstack, xmmalloc);
- obstack_freefun (&objfile -> psymbol_obstack, mfree);
- obstack_chunkfun (&objfile -> symbol_obstack, xmmalloc);
- obstack_freefun (&objfile -> symbol_obstack, mfree);
- obstack_chunkfun (&objfile -> type_obstack, xmmalloc);
- obstack_freefun (&objfile -> type_obstack, mfree);
- /* If already in objfile list, unlink it. */
- unlink_objfile (objfile);
- /* Forget things specific to a particular gdb, may have changed. */
- objfile -> sf = NULL;
- }
- else
- {
-
- /* Set up to detect internal memory corruption. MUST be
- done before the first malloc. See comments in
- init_malloc() and mmcheck(). */
-
- init_malloc (md);
-
- objfile = (struct objfile *)
- xmmalloc (md, sizeof (struct objfile));
- memset (objfile, 0, sizeof (struct objfile));
- objfile -> md = md;
- objfile -> mmfd = fd;
- objfile -> flags |= OBJF_MAPPED;
- mmalloc_setkey (objfile -> md, 0, objfile);
- obstack_specify_allocation_with_arg (&objfile -> psymbol_cache.cache,
- 0, 0, xmmalloc, mfree,
- objfile -> md);
- obstack_specify_allocation_with_arg (&objfile -> psymbol_obstack,
- 0, 0, xmmalloc, mfree,
- objfile -> md);
- obstack_specify_allocation_with_arg (&objfile -> symbol_obstack,
- 0, 0, xmmalloc, mfree,
- objfile -> md);
- obstack_specify_allocation_with_arg (&objfile -> type_obstack,
- 0, 0, xmmalloc, mfree,
- objfile -> md);
- }
- }
-
- if (mapped && (objfile == NULL))
- {
- warning ("symbol table for '%s' will not be mapped",
- bfd_get_filename (abfd));
- }
- }
-#else /* !defined(USE_MMALLOC) || !defined(HAVE_MMAP) */
-
- if (mapped)
- {
- warning ("mapped symbol tables are not supported on this machine; missing or broken mmap().");
-
- /* Turn off the global flag so we don't try to do mapped symbol tables
- any more, which shuts up gdb unless the user specifically gives the
- "mapped" keyword again. */
-
- mapped_symbol_files = 0;
- }
-
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
-
- /* If we don't support mapped symbol files, didn't ask for the file to be
- mapped, or failed to open the mapped file for some reason, then revert
- back to an unmapped objfile. */
-
- if (objfile == NULL)
- {
- objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
- memset (objfile, 0, sizeof (struct objfile));
- objfile -> md = NULL;
- obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0,
- xmalloc, free);
- obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, xmalloc,
- free);
- obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, xmalloc,
- free);
- obstack_specify_allocation (&objfile -> type_obstack, 0, 0, xmalloc,
- free);
- }
-
- /* Update the per-objfile information that comes from the bfd, ensuring
- that any data that is reference is saved in the per-objfile data
- region. */
-
- objfile -> obfd = abfd;
- if (objfile -> name != NULL)
- {
- mfree (objfile -> md, objfile -> name);
- }
- if (abfd != NULL)
- {
- objfile -> name = mstrsave (objfile -> md, bfd_get_filename (abfd));
- objfile -> mtime = bfd_get_mtime (abfd);
-
- /* Build section table. */
-
- if (build_objfile_section_table (objfile))
- {
- error ("Can't find the file sections in `%s': %s",
- objfile -> name, bfd_errmsg (bfd_get_error ()));
- }
- }
-
- /* Add this file onto the tail of the linked list of other such files. */
-
- objfile -> next = NULL;
- if (object_files == NULL)
- object_files = objfile;
- else
- {
- for (last_one = object_files;
- last_one -> next;
- last_one = last_one -> next);
- last_one -> next = objfile;
- }
-
- /* Record whether this objfile was created because the user explicitly
- caused it (e.g., used the add-symbol-file command).
- */
- objfile -> user_loaded = user_loaded;
-
- /* Record whether this objfile definitely represents a solib. */
- objfile -> is_solib = is_solib;
-
- return (objfile);
-}
-
-/* Put OBJFILE at the front of the list. */
-
-void
-objfile_to_front (objfile)
- struct objfile *objfile;
-{
- struct objfile **objp;
- for (objp = &object_files; *objp != NULL; objp = &((*objp)->next))
- {
- if (*objp == objfile)
- {
- /* Unhook it from where it is. */
- *objp = objfile->next;
- /* Put it in the front. */
- objfile->next = object_files;
- object_files = objfile;
- break;
- }
- }
-}
-
-/* Unlink OBJFILE from the list of known objfiles, if it is found in the
- list.
-
- It is not a bug, or error, to call this function if OBJFILE is not known
- to be in the current list. This is done in the case of mapped objfiles,
- for example, just to ensure that the mapped objfile doesn't appear twice
- in the list. Since the list is threaded, linking in a mapped objfile
- twice would create a circular list.
-
- If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
- unlinking it, just to ensure that we have completely severed any linkages
- between the OBJFILE and the list. */
-
-void
-unlink_objfile (objfile)
- struct objfile *objfile;
-{
- struct objfile** objpp;
-
- for (objpp = &object_files; *objpp != NULL; objpp = &((*objpp) -> next))
- {
- if (*objpp == objfile)
- {
- *objpp = (*objpp) -> next;
- objfile -> next = NULL;
- break;
- }
- }
-}
-
-
-/* Destroy an objfile and all the symtabs and psymtabs under it. Note
- that as much as possible is allocated on the symbol_obstack and
- psymbol_obstack, so that the memory can be efficiently freed.
-
- Things which we do NOT free because they are not in malloc'd memory
- or not in memory specific to the objfile include:
-
- objfile -> sf
-
- FIXME: If the objfile is using reusable symbol information (via mmalloc),
- then we need to take into account the fact that more than one process
- may be using the symbol information at the same time (when mmalloc is
- extended to support cooperative locking). When more than one process
- is using the mapped symbol info, we need to be more careful about when
- we free objects in the reusable area. */
-
-void
-free_objfile (objfile)
- struct objfile *objfile;
-{
- /* First do any symbol file specific actions required when we are
- finished with a particular symbol file. Note that if the objfile
- is using reusable symbol information (via mmalloc) then each of
- these routines is responsible for doing the correct thing, either
- freeing things which are valid only during this particular gdb
- execution, or leaving them to be reused during the next one. */
-
- if (objfile -> sf != NULL)
- {
- (*objfile -> sf -> sym_finish) (objfile);
- }
-
- /* We always close the bfd. */
-
- if (objfile -> obfd != NULL)
- {
- char *name = bfd_get_filename (objfile->obfd);
- if (!bfd_close (objfile -> obfd))
- warning ("cannot close \"%s\": %s",
- name, bfd_errmsg (bfd_get_error ()));
- free (name);
- }
-
- /* Remove it from the chain of all objfiles. */
-
- unlink_objfile (objfile);
-
- /* If we are going to free the runtime common objfile, mark it
- as unallocated. */
-
- if (objfile == rt_common_objfile)
- rt_common_objfile = NULL;
-
- /* Before the symbol table code was redone to make it easier to
- selectively load and remove information particular to a specific
- linkage unit, gdb used to do these things whenever the monolithic
- symbol table was blown away. How much still needs to be done
- is unknown, but we play it safe for now and keep each action until
- it is shown to be no longer needed. */
-
-#if defined (CLEAR_SOLIB)
- CLEAR_SOLIB ();
- /* CLEAR_SOLIB closes the bfd's for any shared libraries. But
- the to_sections for a core file might refer to those bfd's. So
- detach any core file. */
- {
- struct target_ops *t = find_core_target ();
- if (t != NULL)
- (t->to_detach) (NULL, 0);
- }
-#endif
- /* I *think* all our callers call clear_symtab_users. If so, no need
- to call this here. */
- clear_pc_function_cache ();
-
- /* The last thing we do is free the objfile struct itself for the
- non-reusable case, or detach from the mapped file for the reusable
- case. Note that the mmalloc_detach or the mfree is the last thing
- we can do with this objfile. */
-
-#if defined(USE_MMALLOC) && defined(HAVE_MMAP)
-
- if (objfile -> flags & OBJF_MAPPED)
- {
- /* Remember the fd so we can close it. We can't close it before
- doing the detach, and after the detach the objfile is gone. */
- int mmfd;
-
- mmfd = objfile -> mmfd;
- mmalloc_detach (objfile -> md);
- objfile = NULL;
- close (mmfd);
- }
-
-#endif /* defined(USE_MMALLOC) && defined(HAVE_MMAP) */
-
- /* If we still have an objfile, then either we don't support reusable
- objfiles or this one was not reusable. So free it normally. */
-
- if (objfile != NULL)
- {
- if (objfile -> name != NULL)
- {
- mfree (objfile -> md, objfile -> name);
- }
- if (objfile->global_psymbols.list)
- mfree (objfile->md, objfile->global_psymbols.list);
- if (objfile->static_psymbols.list)
- mfree (objfile->md, objfile->static_psymbols.list);
- /* Free the obstacks for non-reusable objfiles */
- obstack_free (&objfile -> psymbol_cache.cache, 0);
- obstack_free (&objfile -> psymbol_obstack, 0);
- obstack_free (&objfile -> symbol_obstack, 0);
- obstack_free (&objfile -> type_obstack, 0);
- mfree (objfile -> md, objfile);
- objfile = NULL;
- }
-}
-
-
-/* Free all the object files at once and clean up their users. */
-
-void
-free_all_objfiles ()
-{
- struct objfile *objfile, *temp;
-
- ALL_OBJFILES_SAFE (objfile, temp)
- {
- free_objfile (objfile);
- }
- clear_symtab_users ();
-}
-
-/* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
- entries in new_offsets. */
-void
-objfile_relocate (objfile, new_offsets)
- struct objfile *objfile;
- struct section_offsets *new_offsets;
-{
- struct section_offsets *delta = (struct section_offsets *)
- alloca (sizeof (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);
-}
generated by cgit v1.1 at 2024-11-24 00:58:26 +0000