/* 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.
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. */
+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 "target.h"
#include <sys/types.h>
-#include <sys/stat.h>
+#include "gdb_stat.h"
#include <fcntl.h>
-#include <obstack.h>
+#include "obstack.h"
+#include "gdb_string.h"
/* Prototypes for local functions */
static int
open_mapped_file PARAMS ((char *filename, long mtime, int mapped));
-static CORE_ADDR
-map_to_address PARAMS ((void));
+static PTR
+map_to_file PARAMS ((int));
#endif /* !defined(NO_MMALLOC) && defined(HAVE_MMAP) */
-/* Message to be printed before the error message, when an error occurs. */
-
-extern char *error_pre_print;
+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 */
flagword aflag;
aflag = bfd_get_section_flags (abfd, asect);
- /* FIXME, we need to handle BSS segment here...it alloc's but doesn't load */
- if (!(aflag & SEC_LOAD))
+ if (!(aflag & SEC_ALLOC))
return;
if (0 == bfd_section_size (abfd, asect))
return;
section.offset = 0;
section.objfile = objfile;
- section.sec_ptr = asect;
+ 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, §ion, sizeof(section));
+ obstack_grow (&objfile->psymbol_obstack, (char *) §ion, sizeof(section));
objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1);
}
build_objfile_section_table (objfile)
struct objfile *objfile;
{
- if (objfile->sections)
- abort();
+ /* 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);
int mapped;
{
struct objfile *objfile = NULL;
+ struct objfile *last_one = NULL;
mapped |= mapped_symbol_files;
#if !defined(NO_MMALLOC) && defined(HAVE_MMAP)
+ if (abfd != NULL)
{
/* If we can support mapped symbol files, try to open/reopen the
mapped);
if (fd >= 0)
{
- CORE_ADDR mapto;
PTR md;
- if (((mapto = map_to_address ()) == 0) ||
- ((md = mmalloc_attach (fd, (PTR) mapto)) == NULL))
+ if ((md = map_to_file (fd)) == NULL)
{
close (fd);
}
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);
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);
if (mapped)
{
- warning ("this version of gdb does not support mapped symbol tables.");
+ 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
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,
{
mfree (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);
- /* Build section table. */
+ /* Build section table. */
- if (build_objfile_section_table (objfile))
- {
- error ("Can't find the file sections in `%s': %s",
- objfile -> name, bfd_errmsg (bfd_error));
+ if (build_objfile_section_table (objfile))
+ {
+ error ("Can't find the file sections in `%s': %s",
+ objfile -> name, bfd_errmsg (bfd_get_error ()));
+ }
}
- /* Push this file onto the head of the linked list of other such files. */
-
- objfile -> next = object_files;
- object_files = objfile;
+ /* 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;
+ }
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.
if (objfile -> obfd != NULL)
{
char *name = bfd_get_filename (objfile->obfd);
- bfd_close (objfile -> obfd);
+ if (!bfd_close (objfile -> obfd))
+ warning ("cannot close \"%s\": %s",
+ name, bfd_errmsg (bfd_get_error ()));
free (name);
}
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
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);
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));
+ struct section_offsets *delta = (struct section_offsets *)
+ alloca (sizeof (struct section_offsets)
+ + objfile->num_sections * sizeof (delta->offsets));
{
int i;
{
struct symtab *s;
- for (s = objfile->symtabs; s; s = s->next)
+ ALL_OBJFILE_SYMTABS (objfile, s)
{
struct linetable *l;
struct blockvector *bv;
b = BLOCKVECTOR_BLOCK (bv, i);
BLOCK_START (b) += ANOFFSET (delta, s->block_line_section);
- BLOCK_END (b) += ANOFFSET (delta, s->block_line_section);
+ BLOCK_END (b) += ANOFFSET (delta, s->block_line_section);
for (j = 0; j < BLOCK_NSYMS (b); ++j)
{
|| SYMBOL_CLASS (sym) == LOC_STATIC)
&& SYMBOL_SECTION (sym) >= 0)
{
- SYMBOL_VALUE_ADDRESS (sym) +=
+ 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
}
}
}
ALL_OBJFILE_PSYMTABS (objfile, p)
{
- /* FIXME: specific to symbol readers which use gdb-stabs.h.
- We can only get away with it since objfile_relocate is only
- used on XCOFF, which lacks psymtabs, and for gdb-stabs.h
- targets. */
p->textlow += ANOFFSET (delta, SECT_OFF_TEXT);
p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT);
}
}
{
- struct partial_symbol *psym;
+ 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));
+ 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));
+ if (SYMBOL_SECTION (*psym) >= 0)
+ SYMBOL_VALUE_ADDRESS (*psym) += ANOFFSET (delta,
+ SYMBOL_SECTION (*psym));
}
{
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 ();
}
\f
/* Many places in gdb want to test just to see if we have any partial
{
if (error_pre_print)
{
- printf (error_pre_print);
+ printf_unfiltered (error_pre_print);
}
print_sys_errmsg (symsfilename, errno);
}
{
if (error_pre_print)
{
- printf (error_pre_print);
+ printf_unfiltered (error_pre_print);
}
print_sys_errmsg (symsfilename, errno);
}
return (fd);
}
-/* Return the base address at which we would like the next objfile's
- mapped data to start.
-
- 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
-
- Reclaim address spaces when their mmalloc heaps are unmapped
-
- When mmalloc heaps are shared between processes they have to be
- mapped at the same addresses in each
-
- 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.
-
- etc, etc, etc.
-
- */
-
-
-static CORE_ADDR
-map_to_address ()
+static PTR
+map_to_file (fd)
+ int fd;
{
+ PTR md;
+ CORE_ADDR mapto;
-#if defined(MMAP_BASE_ADDRESS) && defined (MMAP_INCREMENT)
-
- static CORE_ADDR next = MMAP_BASE_ADDRESS;
- CORE_ADDR mapto = next;
-
- next += MMAP_INCREMENT;
- return (mapto);
-
-#else
-
- return (0);
-
-#endif
-
+ 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(NO_MMALLOC) && defined(HAVE_MMAP) */
-/* Returns a section whose range includes PC or NULL if none found. */
+/* 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_section(pc)
+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 (s->addr <= pc
- && pc < s->endaddr)
+ 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);
+}
projects / deliverable / binutils-gdb.git / blobdiff