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* symfile.c: #include "gdb_assert.h".

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(syms_from_objfile): Add the ability to pass in a section offset
table directly, as an alternative to the section_addr_info table.
Document arguments better.
(symbol_file_add): Pass extra arguments to syms_from_objfile.
* symfile.h (syms_from_objfile): Update declaration.
* rs6000-nat.c (objfile_symbol_add): Pass new arguments to
syms_from_objfile.
* Makefile.in (symfile.o): List dependency on $(gdb_assert_h).
This commit is contained in:
Jim Blandy
2003-01-23 07:30:18 +00:00
parent 2307bd6a50
commit 7e8580c13a
5 changed files with 94 additions and 38 deletions
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110
gdb/symfile.c
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@ -43,6 +43,7 @@
#include "completer.h"
#include "bcache.h"
#include <readline/readline.h>
#include "gdb_assert.h"
#include <sys/types.h>
#include <fcntl.h>
@ -572,8 +573,26 @@ default_symfile_offsets (struct objfile *objfile,
OBJFILE is where the symbols are to be read from.
ADDR is the address where the text segment was loaded, unless the
objfile is the main symbol file, in which case it is zero.
ADDRS is the list of section load addresses. If the user has given
an 'add-symbol-file' command, then this is the list of offsets and
addresses he or she provided as arguments to the command; or, if
we're handling a shared library, these are the actual addresses the
sections are loaded at, according to the inferior's dynamic linker
(as gleaned by GDB's shared library code). We convert each address
into an offset from the section VMA's as it appears in the object
file, and then call the file's sym_offsets function to convert this
into a format-specific offset table --- a `struct section_offsets'.
If ADDRS is non-zero, OFFSETS must be zero.
OFFSETS is a table of section offsets already in the right
format-specific representation. NUM_OFFSETS is the number of
elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
assume this is the proper table the call to sym_offsets described
above would produce. Instead of calling sym_offsets, we just dump
it right into objfile->section_offsets. (When we're re-reading
symbols from an objfile, we don't have the original load address
list any more; all we have is the section offset table.) If
OFFSETS is non-zero, ADDRS must be zero.
MAINLINE is nonzero if this is the main symbol file, or zero if
it's an extra symbol file such as dynamically loaded code.
@ -582,8 +601,12 @@ default_symfile_offsets (struct objfile *objfile,
the symbol reading (and complaints can be more terse about it). */
void
syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs,
int mainline, int verbo)
syms_from_objfile (struct objfile *objfile,
struct section_addr_info *addrs,
struct section_offsets *offsets,
int num_offsets,
int mainline,
int verbo)
{
asection *lower_sect;
asection *sect;
@ -592,16 +615,19 @@ syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs,
struct cleanup *old_chain;
int i;
/* If ADDRS is NULL, initialize the local section_addr_info struct and
point ADDRS to it. We now establish the convention that an addr of
zero means no load address was specified. */
gdb_assert (! (addrs && offsets));
if (addrs == NULL)
/* If ADDRS and OFFSETS are both NULL, put together a dummy address
list. We now establish the convention that an addr of zero means
no load address was specified. */
if (! addrs && ! offsets)
{
memset (&local_addr, 0, sizeof (local_addr));
addrs = &local_addr;
}
/* Now either addrs or offsets is non-zero. */
init_entry_point_info (objfile);
find_sym_fns (objfile);
@ -674,30 +700,32 @@ syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs,
this_offset = lower_offset = lower_addr - lower_orig_addr */
/* Calculate offsets for sections. */
for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
{
if (addrs->other[i].addr != 0)
{
sect = bfd_get_section_by_name (objfile->obfd,
addrs->other[i].name);
if (sect)
{
addrs->other[i].addr
-= bfd_section_vma (objfile->obfd, sect);
lower_offset = addrs->other[i].addr;
/* This is the index used by BFD. */
addrs->other[i].sectindex = sect->index ;
}
else
{
warning ("section %s not found in %s", addrs->other[i].name,
objfile->name);
addrs->other[i].addr = 0;
}
}
else
addrs->other[i].addr = lower_offset;
}
if (addrs)
for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
{
if (addrs->other[i].addr != 0)
{
sect = bfd_get_section_by_name (objfile->obfd,
addrs->other[i].name);
if (sect)
{
addrs->other[i].addr
-= bfd_section_vma (objfile->obfd, sect);
lower_offset = addrs->other[i].addr;
/* This is the index used by BFD. */
addrs->other[i].sectindex = sect->index ;
}
else
{
warning ("section %s not found in %s",
addrs->other[i].name,
objfile->name);
addrs->other[i].addr = 0;
}
}
else
addrs->other[i].addr = lower_offset;
}
}
/* Initialize symbol reading routines for this objfile, allow complaints to
@ -707,7 +735,21 @@ syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs,
(*objfile->sf->sym_init) (objfile);
clear_complaints (&symfile_complaints, 1, verbo);
(*objfile->sf->sym_offsets) (objfile, addrs);
if (addrs)
(*objfile->sf->sym_offsets) (objfile, addrs);
else
{
size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
/* Just copy in the offset table directly as given to us. */
objfile->num_sections = num_offsets;
objfile->section_offsets
= ((struct section_offsets *)
obstack_alloc (&objfile->psymbol_obstack, size));
memcpy (objfile->section_offsets, offsets, size);
init_objfile_sect_indices (objfile);
}
#ifndef IBM6000_TARGET
/* This is a SVR4/SunOS specific hack, I think. In any event, it
@ -888,7 +930,7 @@ symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
gdb_flush (gdb_stdout);
}
}
syms_from_objfile (objfile, addrs, mainline, from_tty);
syms_from_objfile (objfile, addrs, 0, 0, mainline, from_tty);
}
/* We now have at least a partial symbol table. Check to see if the