2525 lines
80 KiB
C
2525 lines
80 KiB
C
/* Read dbx symbol tables and convert to internal format, for GDB.
|
||
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
|
||
Free Software Foundation, Inc.
|
||
|
||
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 module provides three functions: dbx_symfile_init,
|
||
which initializes to read a symbol file; dbx_new_init, which
|
||
discards existing cached information when all symbols are being
|
||
discarded; and dbx_symfile_read, which reads a symbol table
|
||
from a file.
|
||
|
||
dbx_symfile_read only does the minimum work necessary for letting the
|
||
user "name" things symbolically; it does not read the entire symtab.
|
||
Instead, it reads the external and static symbols and puts them in partial
|
||
symbol tables. When more extensive information is requested of a
|
||
file, the corresponding partial symbol table is mutated into a full
|
||
fledged symbol table by going back and reading the symbols
|
||
for real. dbx_psymtab_to_symtab() is the function that does this */
|
||
|
||
#include "defs.h"
|
||
#include "gdb_string.h"
|
||
|
||
#if defined(USG) || defined(__CYGNUSCLIB__)
|
||
#include <sys/types.h>
|
||
#include <fcntl.h>
|
||
#endif
|
||
|
||
#include "obstack.h"
|
||
#include <sys/param.h>
|
||
#ifndef NO_SYS_FILE
|
||
#include <sys/file.h>
|
||
#endif
|
||
#include "gdb_stat.h"
|
||
#include <ctype.h>
|
||
#include "symtab.h"
|
||
#include "breakpoint.h"
|
||
#include "command.h"
|
||
#include "target.h"
|
||
#include "gdbcore.h" /* for bfd stuff */
|
||
#include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
|
||
#include "symfile.h"
|
||
#include "objfiles.h"
|
||
#include "buildsym.h"
|
||
#include "stabsread.h"
|
||
#include "gdb-stabs.h"
|
||
#include "demangle.h"
|
||
#include "language.h" /* Needed inside partial-stab.h */
|
||
#include "complaints.h"
|
||
|
||
#include "aout/aout64.h"
|
||
#include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
|
||
|
||
|
||
/* We put a pointer to this structure in the read_symtab_private field
|
||
of the psymtab. */
|
||
|
||
struct symloc {
|
||
|
||
/* Offset within the file symbol table of first local symbol for this
|
||
file. */
|
||
|
||
int ldsymoff;
|
||
|
||
/* Length (in bytes) of the section of the symbol table devoted to
|
||
this file's symbols (actually, the section bracketed may contain
|
||
more than just this file's symbols). If ldsymlen is 0, the only
|
||
reason for this thing's existence is the dependency list. Nothing
|
||
else will happen when it is read in. */
|
||
|
||
int ldsymlen;
|
||
|
||
/* The size of each symbol in the symbol file (in external form). */
|
||
|
||
int symbol_size;
|
||
|
||
/* Further information needed to locate the symbols if they are in
|
||
an ELF file. */
|
||
|
||
int symbol_offset;
|
||
int string_offset;
|
||
int file_string_offset;
|
||
};
|
||
|
||
#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
|
||
#define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
|
||
#define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
|
||
#define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
|
||
#define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
|
||
#define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
|
||
#define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
|
||
|
||
|
||
/* Macro to determine which symbols to ignore when reading the first symbol
|
||
of a file. Some machines override this definition. */
|
||
#ifndef IGNORE_SYMBOL
|
||
/* This code is used on Ultrix systems. Ignore it */
|
||
#define IGNORE_SYMBOL(type) (type == (int)N_NSYMS)
|
||
#endif
|
||
|
||
/* Remember what we deduced to be the source language of this psymtab. */
|
||
|
||
static enum language psymtab_language = language_unknown;
|
||
|
||
/* Nonzero means give verbose info on gdb action. From main.c. */
|
||
extern int info_verbose;
|
||
|
||
/* The BFD for this file -- implicit parameter to next_symbol_text. */
|
||
|
||
static bfd *symfile_bfd;
|
||
|
||
/* The size of each symbol in the symbol file (in external form).
|
||
This is set by dbx_symfile_read when building psymtabs, and by
|
||
dbx_psymtab_to_symtab when building symtabs. */
|
||
|
||
static unsigned symbol_size;
|
||
|
||
/* This is the offset of the symbol table in the executable file */
|
||
static unsigned symbol_table_offset;
|
||
|
||
/* This is the offset of the string table in the executable file */
|
||
static unsigned string_table_offset;
|
||
|
||
/* For elf+stab executables, the n_strx field is not a simple index
|
||
into the string table. Instead, each .o file has a base offset
|
||
in the string table, and the associated symbols contain offsets
|
||
from this base. The following two variables contain the base
|
||
offset for the current and next .o files. */
|
||
static unsigned int file_string_table_offset;
|
||
static unsigned int next_file_string_table_offset;
|
||
|
||
/* .o and NLM files contain unrelocated addresses which are based at 0. When
|
||
non-zero, this flag disables some of the special cases for Solaris elf+stab
|
||
text addresses at location 0. */
|
||
|
||
static int symfile_relocatable = 0;
|
||
|
||
/* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are relative
|
||
to the function start address. */
|
||
|
||
static int block_address_function_relative = 0;
|
||
|
||
/* The lowest text address we have yet encountered. This is needed
|
||
because in an a.out file, there is no header field which tells us
|
||
what address the program is actually going to be loaded at, so we
|
||
need to make guesses based on the symbols (which *are* relocated to
|
||
reflect the address it will be loaded at). */
|
||
static CORE_ADDR lowest_text_address;
|
||
|
||
/* Complaints about the symbols we have encountered. */
|
||
|
||
struct complaint lbrac_complaint =
|
||
{"bad block start address patched", 0, 0};
|
||
|
||
struct complaint string_table_offset_complaint =
|
||
{"bad string table offset in symbol %d", 0, 0};
|
||
|
||
struct complaint unknown_symtype_complaint =
|
||
{"unknown symbol type %s", 0, 0};
|
||
|
||
struct complaint unknown_symchar_complaint =
|
||
{"unknown symbol descriptor `%c'", 0, 0};
|
||
|
||
struct complaint lbrac_rbrac_complaint =
|
||
{"block start larger than block end", 0, 0};
|
||
|
||
struct complaint lbrac_unmatched_complaint =
|
||
{"unmatched N_LBRAC before symtab pos %d", 0, 0};
|
||
|
||
struct complaint lbrac_mismatch_complaint =
|
||
{"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};
|
||
|
||
struct complaint repeated_header_complaint =
|
||
{"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0};
|
||
|
||
/* During initial symbol readin, we need to have a structure to keep
|
||
track of which psymtabs have which bincls in them. This structure
|
||
is used during readin to setup the list of dependencies within each
|
||
partial symbol table. */
|
||
|
||
struct header_file_location
|
||
{
|
||
char *name; /* Name of header file */
|
||
int instance; /* See above */
|
||
struct partial_symtab *pst; /* Partial symtab that has the
|
||
BINCL/EINCL defs for this file */
|
||
};
|
||
|
||
/* The actual list and controling variables */
|
||
static struct header_file_location *bincl_list, *next_bincl;
|
||
static int bincls_allocated;
|
||
|
||
/* Local function prototypes */
|
||
|
||
static void
|
||
free_header_files PARAMS ((void));
|
||
|
||
static void
|
||
init_header_files PARAMS ((void));
|
||
|
||
static void
|
||
read_ofile_symtab PARAMS ((struct partial_symtab *));
|
||
|
||
static void
|
||
dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *));
|
||
|
||
static void
|
||
dbx_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
|
||
|
||
static void
|
||
read_dbx_dynamic_symtab PARAMS ((struct section_offsets *,
|
||
struct objfile *objfile));
|
||
|
||
static void
|
||
read_dbx_symtab PARAMS ((struct section_offsets *, struct objfile *,
|
||
CORE_ADDR, int));
|
||
|
||
static void
|
||
free_bincl_list PARAMS ((struct objfile *));
|
||
|
||
static struct partial_symtab *
|
||
find_corresponding_bincl_psymtab PARAMS ((char *, int));
|
||
|
||
static void
|
||
add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int));
|
||
|
||
static void
|
||
init_bincl_list PARAMS ((int, struct objfile *));
|
||
|
||
static char *
|
||
dbx_next_symbol_text PARAMS ((void));
|
||
|
||
static void
|
||
fill_symbuf PARAMS ((bfd *));
|
||
|
||
static void
|
||
dbx_symfile_init PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
dbx_new_init PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
dbx_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
|
||
|
||
static void
|
||
dbx_symfile_finish PARAMS ((struct objfile *));
|
||
|
||
static void
|
||
record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *));
|
||
|
||
static void
|
||
add_new_header_file PARAMS ((char *, int));
|
||
|
||
static void
|
||
add_old_header_file PARAMS ((char *, int));
|
||
|
||
static void
|
||
add_this_object_header_file PARAMS ((int));
|
||
|
||
/* Free up old header file tables */
|
||
|
||
static void
|
||
free_header_files ()
|
||
{
|
||
register int i;
|
||
|
||
if (header_files != NULL)
|
||
{
|
||
for (i = 0; i < n_header_files; i++)
|
||
{
|
||
free (header_files[i].name);
|
||
}
|
||
free ((PTR)header_files);
|
||
header_files = NULL;
|
||
n_header_files = 0;
|
||
}
|
||
if (this_object_header_files)
|
||
{
|
||
free ((PTR)this_object_header_files);
|
||
this_object_header_files = NULL;
|
||
}
|
||
n_allocated_header_files = 0;
|
||
n_allocated_this_object_header_files = 0;
|
||
}
|
||
|
||
/* Allocate new header file tables */
|
||
|
||
static void
|
||
init_header_files ()
|
||
{
|
||
n_header_files = 0;
|
||
n_allocated_header_files = 10;
|
||
header_files = (struct header_file *)
|
||
xmalloc (10 * sizeof (struct header_file));
|
||
|
||
n_allocated_this_object_header_files = 10;
|
||
this_object_header_files = (int *) xmalloc (10 * sizeof (int));
|
||
}
|
||
|
||
/* Add header file number I for this object file
|
||
at the next successive FILENUM. */
|
||
|
||
static void
|
||
add_this_object_header_file (i)
|
||
int i;
|
||
{
|
||
if (n_this_object_header_files == n_allocated_this_object_header_files)
|
||
{
|
||
n_allocated_this_object_header_files *= 2;
|
||
this_object_header_files
|
||
= (int *) xrealloc ((char *) this_object_header_files,
|
||
n_allocated_this_object_header_files * sizeof (int));
|
||
}
|
||
|
||
this_object_header_files[n_this_object_header_files++] = i;
|
||
}
|
||
|
||
/* Add to this file an "old" header file, one already seen in
|
||
a previous object file. NAME is the header file's name.
|
||
INSTANCE is its instance code, to select among multiple
|
||
symbol tables for the same header file. */
|
||
|
||
static void
|
||
add_old_header_file (name, instance)
|
||
char *name;
|
||
int instance;
|
||
{
|
||
register struct header_file *p = header_files;
|
||
register int i;
|
||
|
||
for (i = 0; i < n_header_files; i++)
|
||
if (STREQ (p[i].name, name) && instance == p[i].instance)
|
||
{
|
||
add_this_object_header_file (i);
|
||
return;
|
||
}
|
||
complain (&repeated_header_complaint, name, symnum);
|
||
}
|
||
|
||
/* Add to this file a "new" header file: definitions for its types follow.
|
||
NAME is the header file's name.
|
||
Most often this happens only once for each distinct header file,
|
||
but not necessarily. If it happens more than once, INSTANCE has
|
||
a different value each time, and references to the header file
|
||
use INSTANCE values to select among them.
|
||
|
||
dbx output contains "begin" and "end" markers for each new header file,
|
||
but at this level we just need to know which files there have been;
|
||
so we record the file when its "begin" is seen and ignore the "end". */
|
||
|
||
static void
|
||
add_new_header_file (name, instance)
|
||
char *name;
|
||
int instance;
|
||
{
|
||
register int i;
|
||
|
||
/* Make sure there is room for one more header file. */
|
||
|
||
if (n_header_files == n_allocated_header_files)
|
||
{
|
||
n_allocated_header_files *= 2;
|
||
header_files = (struct header_file *)
|
||
xrealloc ((char *) header_files,
|
||
(n_allocated_header_files * sizeof (struct header_file)));
|
||
}
|
||
|
||
/* Create an entry for this header file. */
|
||
|
||
i = n_header_files++;
|
||
header_files[i].name = savestring (name, strlen(name));
|
||
header_files[i].instance = instance;
|
||
header_files[i].length = 10;
|
||
header_files[i].vector
|
||
= (struct type **) xmalloc (10 * sizeof (struct type *));
|
||
memset (header_files[i].vector, 0, 10 * sizeof (struct type *));
|
||
|
||
add_this_object_header_file (i);
|
||
}
|
||
|
||
#if 0
|
||
static struct type **
|
||
explicit_lookup_type (real_filenum, index)
|
||
int real_filenum, index;
|
||
{
|
||
register struct header_file *f = &header_files[real_filenum];
|
||
|
||
if (index >= f->length)
|
||
{
|
||
f->length *= 2;
|
||
f->vector = (struct type **)
|
||
xrealloc (f->vector, f->length * sizeof (struct type *));
|
||
memset (&f->vector[f->length / 2],
|
||
'\0', f->length * sizeof (struct type *) / 2);
|
||
}
|
||
return &f->vector[index];
|
||
}
|
||
#endif
|
||
|
||
static void
|
||
record_minimal_symbol (name, address, type, objfile)
|
||
char *name;
|
||
CORE_ADDR address;
|
||
int type;
|
||
struct objfile *objfile;
|
||
{
|
||
enum minimal_symbol_type ms_type;
|
||
int section;
|
||
|
||
switch (type)
|
||
{
|
||
case N_TEXT | N_EXT:
|
||
ms_type = mst_text;
|
||
section = SECT_OFF_TEXT;
|
||
break;
|
||
case N_DATA | N_EXT:
|
||
ms_type = mst_data;
|
||
section = SECT_OFF_DATA;
|
||
break;
|
||
case N_BSS | N_EXT:
|
||
ms_type = mst_bss;
|
||
section = SECT_OFF_BSS;
|
||
break;
|
||
case N_ABS | N_EXT:
|
||
ms_type = mst_abs;
|
||
section = -1;
|
||
break;
|
||
#ifdef N_SETV
|
||
case N_SETV | N_EXT:
|
||
ms_type = mst_data;
|
||
section = SECT_OFF_DATA;
|
||
break;
|
||
case N_SETV:
|
||
/* I don't think this type actually exists; since a N_SETV is the result
|
||
of going over many .o files, it doesn't make sense to have one
|
||
file local. */
|
||
ms_type = mst_file_data;
|
||
section = SECT_OFF_DATA;
|
||
break;
|
||
#endif
|
||
case N_TEXT:
|
||
case N_NBTEXT:
|
||
case N_FN:
|
||
case N_FN_SEQ:
|
||
ms_type = mst_file_text;
|
||
section = SECT_OFF_TEXT;
|
||
break;
|
||
case N_DATA:
|
||
ms_type = mst_file_data;
|
||
|
||
/* Check for __DYNAMIC, which is used by Sun shared libraries.
|
||
Record it as global even if it's local, not global, so
|
||
lookup_minimal_symbol can find it. We don't check symbol_leading_char
|
||
because for SunOS4 it always is '_'. */
|
||
if (name[8] == 'C' && STREQ ("__DYNAMIC", name))
|
||
ms_type = mst_data;
|
||
|
||
/* Same with virtual function tables, both global and static. */
|
||
{
|
||
char *tempstring = name;
|
||
if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
|
||
++tempstring;
|
||
if (VTBL_PREFIX_P ((tempstring)))
|
||
ms_type = mst_data;
|
||
}
|
||
section = SECT_OFF_DATA;
|
||
break;
|
||
case N_BSS:
|
||
ms_type = mst_file_bss;
|
||
section = SECT_OFF_BSS;
|
||
break;
|
||
default:
|
||
ms_type = mst_unknown;
|
||
section = -1;
|
||
break;
|
||
}
|
||
|
||
if ((ms_type == mst_file_text || ms_type == mst_text)
|
||
&& address < lowest_text_address)
|
||
lowest_text_address = address;
|
||
|
||
prim_record_minimal_symbol_and_info
|
||
(obsavestring (name, strlen (name), &objfile -> symbol_obstack),
|
||
address,
|
||
ms_type,
|
||
NULL,
|
||
section,
|
||
objfile);
|
||
}
|
||
|
||
/* Scan and build partial symbols for a symbol file.
|
||
We have been initialized by a call to dbx_symfile_init, which
|
||
put all the relevant info into a "struct dbx_symfile_info",
|
||
hung off the objfile structure.
|
||
|
||
SECTION_OFFSETS contains offsets relative to which the symbols in the
|
||
various sections are (depending where the sections were actually loaded).
|
||
MAINLINE is true if we are reading the main symbol
|
||
table (as opposed to a shared lib or dynamically loaded file). */
|
||
|
||
static void
|
||
dbx_symfile_read (objfile, section_offsets, mainline)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
int mainline; /* FIXME comments above */
|
||
{
|
||
bfd *sym_bfd;
|
||
int val;
|
||
struct cleanup *back_to;
|
||
|
||
val = strlen (objfile->name);
|
||
|
||
/* .o and .nlm files are relocatables with text, data and bss segs based at
|
||
0. This flag disables special (Solaris stabs-in-elf only) fixups for
|
||
symbols with a value of 0. XXX - This is a Krock. Solaris stabs-in-elf
|
||
should be fixed to determine pst->textlow without using this text seg of
|
||
0 fixup crap. */
|
||
|
||
if (strcmp (&objfile->name[val-2], ".o") == 0
|
||
|| strcmp (&objfile->name[val-4], ".nlm") == 0)
|
||
symfile_relocatable = 1;
|
||
|
||
/* This is true for Solaris (and all other systems which put stabs
|
||
in sections, hopefully, since it would be silly to do things
|
||
differently from Solaris), and false for SunOS4 and other a.out
|
||
file formats. */
|
||
block_address_function_relative =
|
||
((0 == strncmp (bfd_get_target (objfile->obfd), "elf", 3))
|
||
|| (0 == strncmp (bfd_get_target (objfile->obfd), "som", 3))
|
||
|| (0 == strncmp (bfd_get_target (objfile->obfd), "coff", 4))
|
||
|| (0 == strncmp (bfd_get_target (objfile->obfd), "pe", 2))
|
||
|| (0 == strncmp (bfd_get_target (objfile->obfd), "nlm", 3)));
|
||
|
||
sym_bfd = objfile->obfd;
|
||
val = bfd_seek (objfile->obfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
|
||
if (val < 0)
|
||
perror_with_name (objfile->name);
|
||
|
||
/* If we are reinitializing, or if we have never loaded syms yet, init */
|
||
if (mainline
|
||
|| objfile->global_psymbols.size == 0
|
||
|| objfile->static_psymbols.size == 0)
|
||
init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
|
||
|
||
symbol_size = DBX_SYMBOL_SIZE (objfile);
|
||
symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
|
||
|
||
pending_blocks = 0;
|
||
back_to = make_cleanup (really_free_pendings, 0);
|
||
|
||
init_minimal_symbol_collection ();
|
||
make_cleanup (discard_minimal_symbols, 0);
|
||
|
||
/* Now that the symbol table data of the executable file are all in core,
|
||
process them and define symbols accordingly. */
|
||
|
||
read_dbx_symtab (section_offsets, objfile,
|
||
DBX_TEXT_ADDR (objfile),
|
||
DBX_TEXT_SIZE (objfile));
|
||
|
||
/* Add the dynamic symbols. */
|
||
|
||
read_dbx_dynamic_symtab (section_offsets, objfile);
|
||
|
||
/* Install any minimal symbols that have been collected as the current
|
||
minimal symbols for this objfile. */
|
||
|
||
install_minimal_symbols (objfile);
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
/* Initialize anything that needs initializing when a completely new
|
||
symbol file is specified (not just adding some symbols from another
|
||
file, e.g. a shared library). */
|
||
|
||
static void
|
||
dbx_new_init (ignore)
|
||
struct objfile *ignore;
|
||
{
|
||
stabsread_new_init ();
|
||
buildsym_new_init ();
|
||
init_header_files ();
|
||
}
|
||
|
||
|
||
/* dbx_symfile_init ()
|
||
is the dbx-specific initialization routine for reading symbols.
|
||
It is passed a struct objfile which contains, among other things,
|
||
the BFD for the file whose symbols are being read, and a slot for a pointer
|
||
to "private data" which we fill with goodies.
|
||
|
||
We read the string table into malloc'd space and stash a pointer to it.
|
||
|
||
Since BFD doesn't know how to read debug symbols in a format-independent
|
||
way (and may never do so...), we have to do it ourselves. We will never
|
||
be called unless this is an a.out (or very similar) file.
|
||
FIXME, there should be a cleaner peephole into the BFD environment here. */
|
||
|
||
#define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
|
||
|
||
static void
|
||
dbx_symfile_init (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
int val;
|
||
bfd *sym_bfd = objfile->obfd;
|
||
char *name = bfd_get_filename (sym_bfd);
|
||
asection *text_sect;
|
||
unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
|
||
|
||
/* Allocate struct to keep track of the symfile */
|
||
objfile->sym_stab_info = (PTR)
|
||
xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
|
||
|
||
/* FIXME POKING INSIDE BFD DATA STRUCTURES */
|
||
#define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
|
||
#define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
|
||
|
||
/* FIXME POKING INSIDE BFD DATA STRUCTURES */
|
||
|
||
DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
|
||
|
||
text_sect = bfd_get_section_by_name (sym_bfd, ".text");
|
||
if (!text_sect)
|
||
error ("Can't find .text section in symbol file");
|
||
DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
|
||
DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
|
||
|
||
DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
|
||
DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
|
||
DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
|
||
|
||
/* Read the string table and stash it away in the psymbol_obstack. It is
|
||
only needed as long as we need to expand psymbols into full symbols,
|
||
so when we blow away the psymbol the string table goes away as well.
|
||
Note that gdb used to use the results of attempting to malloc the
|
||
string table, based on the size it read, as a form of sanity check
|
||
for botched byte swapping, on the theory that a byte swapped string
|
||
table size would be so totally bogus that the malloc would fail. Now
|
||
that we put in on the psymbol_obstack, we can't do this since gdb gets
|
||
a fatal error (out of virtual memory) if the size is bogus. We can
|
||
however at least check to see if the size is less than the size of
|
||
the size field itself, or larger than the size of the entire file.
|
||
Note that all valid string tables have a size greater than zero, since
|
||
the bytes used to hold the size are included in the count. */
|
||
|
||
if (STRING_TABLE_OFFSET == 0)
|
||
{
|
||
/* It appears that with the existing bfd code, STRING_TABLE_OFFSET
|
||
will never be zero, even when there is no string table. This
|
||
would appear to be a bug in bfd. */
|
||
DBX_STRINGTAB_SIZE (objfile) = 0;
|
||
DBX_STRINGTAB (objfile) = NULL;
|
||
}
|
||
else
|
||
{
|
||
val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
|
||
if (val < 0)
|
||
perror_with_name (name);
|
||
|
||
memset ((PTR) size_temp, 0, sizeof (size_temp));
|
||
val = bfd_read ((PTR) size_temp, sizeof (size_temp), 1, sym_bfd);
|
||
if (val < 0)
|
||
{
|
||
perror_with_name (name);
|
||
}
|
||
else if (val == 0)
|
||
{
|
||
/* With the existing bfd code, STRING_TABLE_OFFSET will be set to
|
||
EOF if there is no string table, and attempting to read the size
|
||
from EOF will read zero bytes. */
|
||
DBX_STRINGTAB_SIZE (objfile) = 0;
|
||
DBX_STRINGTAB (objfile) = NULL;
|
||
}
|
||
else
|
||
{
|
||
/* Read some data that would appear to be the string table size.
|
||
If there really is a string table, then it is probably the right
|
||
size. Byteswap if necessary and validate the size. Note that
|
||
the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
|
||
random data that happened to be at STRING_TABLE_OFFSET, because
|
||
bfd can't tell us there is no string table, the sanity checks may
|
||
or may not catch this. */
|
||
DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
|
||
|
||
if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
|
||
|| DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
|
||
error ("ridiculous string table size (%d bytes).",
|
||
DBX_STRINGTAB_SIZE (objfile));
|
||
|
||
DBX_STRINGTAB (objfile) =
|
||
(char *) obstack_alloc (&objfile -> psymbol_obstack,
|
||
DBX_STRINGTAB_SIZE (objfile));
|
||
|
||
/* Now read in the string table in one big gulp. */
|
||
|
||
val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
|
||
if (val < 0)
|
||
perror_with_name (name);
|
||
val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1,
|
||
sym_bfd);
|
||
if (val != DBX_STRINGTAB_SIZE (objfile))
|
||
perror_with_name (name);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Perform any local cleanups required when we are done with a particular
|
||
objfile. I.E, we are in the process of discarding all symbol information
|
||
for an objfile, freeing up all memory held for it, and unlinking the
|
||
objfile struct from the global list of known objfiles. */
|
||
|
||
static void
|
||
dbx_symfile_finish (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
if (objfile->sym_stab_info != NULL)
|
||
{
|
||
mfree (objfile -> md, objfile->sym_stab_info);
|
||
}
|
||
free_header_files ();
|
||
}
|
||
|
||
|
||
/* Buffer for reading the symbol table entries. */
|
||
static struct internal_nlist symbuf[4096];
|
||
static int symbuf_idx;
|
||
static int symbuf_end;
|
||
|
||
/* Name of last function encountered. Used in Solaris to approximate
|
||
object file boundaries. */
|
||
static char *last_function_name;
|
||
|
||
/* The address in memory of the string table of the object file we are
|
||
reading (which might not be the "main" object file, but might be a
|
||
shared library or some other dynamically loaded thing). This is
|
||
set by read_dbx_symtab when building psymtabs, and by
|
||
read_ofile_symtab when building symtabs, and is used only by
|
||
next_symbol_text. FIXME: If that is true, we don't need it when
|
||
building psymtabs, right? */
|
||
static char *stringtab_global;
|
||
|
||
/* These variables are used to control fill_symbuf when the stabs
|
||
symbols are not contiguous (as may be the case when a COFF file is
|
||
linked using --split-by-reloc). */
|
||
static struct stab_section_list *symbuf_sections;
|
||
static unsigned int symbuf_left;
|
||
static unsigned int symbuf_read;
|
||
|
||
/* Refill the symbol table input buffer
|
||
and set the variables that control fetching entries from it.
|
||
Reports an error if no data available.
|
||
This function can read past the end of the symbol table
|
||
(into the string table) but this does no harm. */
|
||
|
||
static void
|
||
fill_symbuf (sym_bfd)
|
||
bfd *sym_bfd;
|
||
{
|
||
unsigned int count;
|
||
int nbytes;
|
||
|
||
if (symbuf_sections == NULL)
|
||
count = sizeof (symbuf);
|
||
else
|
||
{
|
||
if (symbuf_left <= 0)
|
||
{
|
||
file_ptr filepos = symbuf_sections->section->filepos;
|
||
if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
|
||
perror_with_name (bfd_get_filename (sym_bfd));
|
||
symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
|
||
symbol_table_offset = filepos - symbuf_read;
|
||
symbuf_sections = symbuf_sections->next;
|
||
}
|
||
|
||
count = symbuf_left;
|
||
if (count > sizeof (symbuf))
|
||
count = sizeof (symbuf);
|
||
}
|
||
|
||
nbytes = bfd_read ((PTR)symbuf, count, 1, sym_bfd);
|
||
if (nbytes < 0)
|
||
perror_with_name (bfd_get_filename (sym_bfd));
|
||
else if (nbytes == 0)
|
||
error ("Premature end of file reading symbol table");
|
||
symbuf_end = nbytes / symbol_size;
|
||
symbuf_idx = 0;
|
||
symbuf_left -= nbytes;
|
||
symbuf_read += nbytes;
|
||
}
|
||
|
||
#define SWAP_SYMBOL(symp, abfd) \
|
||
{ \
|
||
(symp)->n_strx = bfd_h_get_32(abfd, \
|
||
(unsigned char *)&(symp)->n_strx); \
|
||
(symp)->n_desc = bfd_h_get_16 (abfd, \
|
||
(unsigned char *)&(symp)->n_desc); \
|
||
(symp)->n_value = bfd_h_get_32 (abfd, \
|
||
(unsigned char *)&(symp)->n_value); \
|
||
}
|
||
|
||
/* Invariant: The symbol pointed to by symbuf_idx is the first one
|
||
that hasn't been swapped. Swap the symbol at the same time
|
||
that symbuf_idx is incremented. */
|
||
|
||
/* dbx allows the text of a symbol name to be continued into the
|
||
next symbol name! When such a continuation is encountered
|
||
(a \ at the end of the text of a name)
|
||
call this function to get the continuation. */
|
||
|
||
static char *
|
||
dbx_next_symbol_text ()
|
||
{
|
||
if (symbuf_idx == symbuf_end)
|
||
fill_symbuf (symfile_bfd);
|
||
symnum++;
|
||
SWAP_SYMBOL(&symbuf[symbuf_idx], symfile_bfd);
|
||
return symbuf[symbuf_idx++].n_strx + stringtab_global
|
||
+ file_string_table_offset;
|
||
}
|
||
|
||
/* Initialize the list of bincls to contain none and have some
|
||
allocated. */
|
||
|
||
static void
|
||
init_bincl_list (number, objfile)
|
||
int number;
|
||
struct objfile *objfile;
|
||
{
|
||
bincls_allocated = number;
|
||
next_bincl = bincl_list = (struct header_file_location *)
|
||
xmmalloc (objfile -> md, bincls_allocated * sizeof(struct header_file_location));
|
||
}
|
||
|
||
/* Add a bincl to the list. */
|
||
|
||
static void
|
||
add_bincl_to_list (pst, name, instance)
|
||
struct partial_symtab *pst;
|
||
char *name;
|
||
int instance;
|
||
{
|
||
if (next_bincl >= bincl_list + bincls_allocated)
|
||
{
|
||
int offset = next_bincl - bincl_list;
|
||
bincls_allocated *= 2;
|
||
bincl_list = (struct header_file_location *)
|
||
xmrealloc (pst->objfile->md, (char *)bincl_list,
|
||
bincls_allocated * sizeof (struct header_file_location));
|
||
next_bincl = bincl_list + offset;
|
||
}
|
||
next_bincl->pst = pst;
|
||
next_bincl->instance = instance;
|
||
next_bincl++->name = name;
|
||
}
|
||
|
||
/* Given a name, value pair, find the corresponding
|
||
bincl in the list. Return the partial symtab associated
|
||
with that header_file_location. */
|
||
|
||
static struct partial_symtab *
|
||
find_corresponding_bincl_psymtab (name, instance)
|
||
char *name;
|
||
int instance;
|
||
{
|
||
struct header_file_location *bincl;
|
||
|
||
for (bincl = bincl_list; bincl < next_bincl; bincl++)
|
||
if (bincl->instance == instance
|
||
&& STREQ (name, bincl->name))
|
||
return bincl->pst;
|
||
|
||
complain (&repeated_header_complaint, name, symnum);
|
||
return (struct partial_symtab *) 0;
|
||
}
|
||
|
||
/* Free the storage allocated for the bincl list. */
|
||
|
||
static void
|
||
free_bincl_list (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
mfree (objfile -> md, (PTR)bincl_list);
|
||
bincls_allocated = 0;
|
||
}
|
||
|
||
/* Scan a SunOs dynamic symbol table for symbols of interest and
|
||
add them to the minimal symbol table. */
|
||
|
||
static void
|
||
read_dbx_dynamic_symtab (section_offsets, objfile)
|
||
struct section_offsets *section_offsets;
|
||
struct objfile *objfile;
|
||
{
|
||
bfd *abfd = objfile->obfd;
|
||
struct cleanup *back_to;
|
||
int counter;
|
||
long dynsym_size;
|
||
long dynsym_count;
|
||
asymbol **dynsyms;
|
||
asymbol **symptr;
|
||
arelent **relptr;
|
||
long dynrel_size;
|
||
long dynrel_count;
|
||
arelent **dynrels;
|
||
CORE_ADDR sym_value;
|
||
char *name;
|
||
|
||
/* Check that the symbol file has dynamic symbols that we know about.
|
||
bfd_arch_unknown can happen if we are reading a sun3 symbol file
|
||
on a sun4 host (and vice versa) and bfd is not configured
|
||
--with-target=all. This would trigger an assertion in bfd/sunos.c,
|
||
so we ignore the dynamic symbols in this case. */
|
||
if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
|
||
|| (bfd_get_file_flags (abfd) & DYNAMIC) == 0
|
||
|| bfd_get_arch (abfd) == bfd_arch_unknown)
|
||
return;
|
||
|
||
dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
|
||
if (dynsym_size < 0)
|
||
return;
|
||
|
||
dynsyms = (asymbol **) xmalloc (dynsym_size);
|
||
back_to = make_cleanup (free, dynsyms);
|
||
|
||
dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
|
||
if (dynsym_count < 0)
|
||
{
|
||
do_cleanups (back_to);
|
||
return;
|
||
}
|
||
|
||
/* Enter dynamic symbols into the minimal symbol table
|
||
if this is a stripped executable. */
|
||
if (bfd_get_symcount (abfd) <= 0)
|
||
{
|
||
symptr = dynsyms;
|
||
for (counter = 0; counter < dynsym_count; counter++, symptr++)
|
||
{
|
||
asymbol *sym = *symptr;
|
||
asection *sec;
|
||
int type;
|
||
|
||
sec = bfd_get_section (sym);
|
||
|
||
/* BFD symbols are section relative. */
|
||
sym_value = sym->value + sec->vma;
|
||
|
||
if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
|
||
{
|
||
sym_value += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
type = N_TEXT;
|
||
}
|
||
else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
|
||
{
|
||
sym_value += ANOFFSET (section_offsets, SECT_OFF_DATA);
|
||
type = N_DATA;
|
||
}
|
||
else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
|
||
{
|
||
sym_value += ANOFFSET (section_offsets, SECT_OFF_BSS);
|
||
type = N_BSS;
|
||
}
|
||
else
|
||
continue;
|
||
|
||
if (sym->flags & BSF_GLOBAL)
|
||
type |= N_EXT;
|
||
|
||
record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
|
||
type, objfile);
|
||
}
|
||
}
|
||
|
||
/* Symbols from shared libraries have a dynamic relocation entry
|
||
that points to the associated slot in the procedure linkage table.
|
||
We make a mininal symbol table entry with type mst_solib_trampoline
|
||
at the address in the procedure linkage table. */
|
||
dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
|
||
if (dynrel_size < 0)
|
||
{
|
||
do_cleanups (back_to);
|
||
return;
|
||
}
|
||
|
||
dynrels = (arelent **) xmalloc (dynrel_size);
|
||
make_cleanup (free, dynrels);
|
||
|
||
dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
|
||
if (dynrel_count < 0)
|
||
{
|
||
do_cleanups (back_to);
|
||
return;
|
||
}
|
||
|
||
for (counter = 0, relptr = dynrels;
|
||
counter < dynrel_count;
|
||
counter++, relptr++)
|
||
{
|
||
arelent *rel = *relptr;
|
||
CORE_ADDR address =
|
||
rel->address + ANOFFSET (section_offsets, SECT_OFF_DATA);
|
||
|
||
switch (bfd_get_arch (abfd))
|
||
{
|
||
case bfd_arch_sparc:
|
||
if (rel->howto->type != RELOC_JMP_SLOT)
|
||
continue;
|
||
break;
|
||
case bfd_arch_m68k:
|
||
/* `16' is the type BFD produces for a jump table relocation. */
|
||
if (rel->howto->type != 16)
|
||
continue;
|
||
|
||
/* Adjust address in the jump table to point to
|
||
the start of the bsr instruction. */
|
||
address -= 2;
|
||
break;
|
||
default:
|
||
continue;
|
||
}
|
||
|
||
name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
|
||
prim_record_minimal_symbol
|
||
(obsavestring (name, strlen (name), &objfile -> symbol_obstack),
|
||
address,
|
||
mst_solib_trampoline,
|
||
objfile);
|
||
}
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
/* Given pointers to an a.out symbol table in core containing dbx
|
||
style data, setup partial_symtab's describing each source file for
|
||
which debugging information is available.
|
||
SYMFILE_NAME is the name of the file we are reading from
|
||
and SECTION_OFFSETS is the set of offsets for the various sections
|
||
of the file (a set of zeros if the mainline program). */
|
||
|
||
static void
|
||
read_dbx_symtab (section_offsets, objfile, text_addr, text_size)
|
||
struct section_offsets *section_offsets;
|
||
struct objfile *objfile;
|
||
CORE_ADDR text_addr;
|
||
int text_size;
|
||
{
|
||
register struct internal_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
|
||
register char *namestring;
|
||
int nsl;
|
||
int past_first_source_file = 0;
|
||
CORE_ADDR last_o_file_start = 0;
|
||
struct cleanup *back_to;
|
||
bfd *abfd;
|
||
|
||
/* Current partial symtab */
|
||
struct partial_symtab *pst;
|
||
|
||
/* List of current psymtab's include files */
|
||
char **psymtab_include_list;
|
||
int includes_allocated;
|
||
int includes_used;
|
||
|
||
/* Index within current psymtab dependency list */
|
||
struct partial_symtab **dependency_list;
|
||
int dependencies_used, dependencies_allocated;
|
||
|
||
/* FIXME. We probably want to change stringtab_global rather than add this
|
||
while processing every symbol entry. FIXME. */
|
||
file_string_table_offset = 0;
|
||
next_file_string_table_offset = 0;
|
||
|
||
stringtab_global = DBX_STRINGTAB (objfile);
|
||
|
||
pst = (struct partial_symtab *) 0;
|
||
|
||
includes_allocated = 30;
|
||
includes_used = 0;
|
||
psymtab_include_list = (char **) alloca (includes_allocated *
|
||
sizeof (char *));
|
||
|
||
dependencies_allocated = 30;
|
||
dependencies_used = 0;
|
||
dependency_list =
|
||
(struct partial_symtab **) alloca (dependencies_allocated *
|
||
sizeof (struct partial_symtab *));
|
||
|
||
/* Init bincl list */
|
||
init_bincl_list (20, objfile);
|
||
back_to = make_cleanup (free_bincl_list, objfile);
|
||
|
||
last_source_file = NULL;
|
||
|
||
lowest_text_address = (CORE_ADDR)-1;
|
||
|
||
symfile_bfd = objfile->obfd; /* For next_text_symbol */
|
||
abfd = objfile->obfd;
|
||
symbuf_end = symbuf_idx = 0;
|
||
next_symbol_text_func = dbx_next_symbol_text;
|
||
|
||
for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
|
||
{
|
||
/* Get the symbol for this run and pull out some info */
|
||
QUIT; /* allow this to be interruptable */
|
||
if (symbuf_idx == symbuf_end)
|
||
fill_symbuf (abfd);
|
||
bufp = &symbuf[symbuf_idx++];
|
||
|
||
/*
|
||
* Special case to speed up readin.
|
||
*/
|
||
if (bufp->n_type == (unsigned char)N_SLINE) continue;
|
||
|
||
SWAP_SYMBOL (bufp, abfd);
|
||
|
||
/* Ok. There is a lot of code duplicated in the rest of this
|
||
switch statement (for efficiency reasons). Since I don't
|
||
like duplicating code, I will do my penance here, and
|
||
describe the code which is duplicated:
|
||
|
||
*) The assignment to namestring.
|
||
*) The call to strchr.
|
||
*) The addition of a partial symbol the the two partial
|
||
symbol lists. This last is a large section of code, so
|
||
I've imbedded it in the following macro.
|
||
*/
|
||
|
||
/* Set namestring based on bufp. If the string table index is invalid,
|
||
give a fake name, and print a single error message per symbol file read,
|
||
rather than abort the symbol reading or flood the user with messages. */
|
||
|
||
/*FIXME: Too many adds and indirections in here for the inner loop. */
|
||
#define SET_NAMESTRING()\
|
||
if (((unsigned)bufp->n_strx + file_string_table_offset) >= \
|
||
DBX_STRINGTAB_SIZE (objfile)) { \
|
||
complain (&string_table_offset_complaint, symnum); \
|
||
namestring = "<bad string table offset>"; \
|
||
} else \
|
||
namestring = bufp->n_strx + file_string_table_offset + \
|
||
DBX_STRINGTAB (objfile)
|
||
|
||
#define CUR_SYMBOL_TYPE bufp->n_type
|
||
#define CUR_SYMBOL_VALUE bufp->n_value
|
||
#define DBXREAD_ONLY
|
||
#define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
|
||
start_psymtab(ofile, secoff, fname, low, symoff, global_syms, static_syms)
|
||
#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\
|
||
end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)
|
||
|
||
#include "partial-stab.h"
|
||
}
|
||
|
||
/* If there's stuff to be cleaned up, clean it up. */
|
||
if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
|
||
/*FIXME, does this have a bug at start address 0? */
|
||
&& last_o_file_start
|
||
&& objfile -> ei.entry_point < bufp->n_value
|
||
&& objfile -> ei.entry_point >= last_o_file_start)
|
||
{
|
||
objfile -> ei.entry_file_lowpc = last_o_file_start;
|
||
objfile -> ei.entry_file_highpc = bufp->n_value;
|
||
}
|
||
|
||
if (pst)
|
||
{
|
||
end_psymtab (pst, psymtab_include_list, includes_used,
|
||
symnum * symbol_size,
|
||
(lowest_text_address == (CORE_ADDR)-1
|
||
? (text_addr + section_offsets->offsets[SECT_OFF_TEXT])
|
||
: lowest_text_address)
|
||
+ text_size,
|
||
dependency_list, dependencies_used);
|
||
}
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
/* Allocate and partially fill a partial symtab. It will be
|
||
completely filled at the end of the symbol list.
|
||
|
||
SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
|
||
is the address relative to which its symbols are (incremental) or 0
|
||
(normal). */
|
||
|
||
|
||
struct partial_symtab *
|
||
start_psymtab (objfile, section_offsets,
|
||
filename, textlow, ldsymoff, global_syms, static_syms)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
char *filename;
|
||
CORE_ADDR textlow;
|
||
int ldsymoff;
|
||
struct partial_symbol *global_syms;
|
||
struct partial_symbol *static_syms;
|
||
{
|
||
struct partial_symtab *result =
|
||
start_psymtab_common(objfile, section_offsets,
|
||
filename, textlow, global_syms, static_syms);
|
||
|
||
result->read_symtab_private = (char *)
|
||
obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
|
||
LDSYMOFF(result) = ldsymoff;
|
||
result->read_symtab = dbx_psymtab_to_symtab;
|
||
SYMBOL_SIZE(result) = symbol_size;
|
||
SYMBOL_OFFSET(result) = symbol_table_offset;
|
||
STRING_OFFSET(result) = string_table_offset;
|
||
FILE_STRING_OFFSET(result) = file_string_table_offset;
|
||
|
||
/* If we're handling an ELF file, drag some section-relocation info
|
||
for this source file out of the ELF symbol table, to compensate for
|
||
Sun brain death. This replaces the section_offsets in this psymtab,
|
||
if successful. */
|
||
elfstab_offset_sections (objfile, result);
|
||
|
||
/* Deduce the source language from the filename for this psymtab. */
|
||
psymtab_language = deduce_language_from_filename (filename);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Close off the current usage of PST.
|
||
Returns PST or NULL if the partial symtab was empty and thrown away.
|
||
|
||
FIXME: List variables and peculiarities of same. */
|
||
|
||
struct partial_symtab *
|
||
end_psymtab (pst, include_list, num_includes, capping_symbol_offset,
|
||
capping_text, dependency_list, number_dependencies)
|
||
struct partial_symtab *pst;
|
||
char **include_list;
|
||
int num_includes;
|
||
int capping_symbol_offset;
|
||
CORE_ADDR capping_text;
|
||
struct partial_symtab **dependency_list;
|
||
int number_dependencies;
|
||
{
|
||
int i;
|
||
struct objfile *objfile = pst -> objfile;
|
||
|
||
if (capping_symbol_offset != -1)
|
||
LDSYMLEN(pst) = capping_symbol_offset - LDSYMOFF(pst);
|
||
pst->texthigh = capping_text;
|
||
|
||
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
||
/* Under Solaris, the N_SO symbols always have a value of 0,
|
||
instead of the usual address of the .o file. Therefore,
|
||
we have to do some tricks to fill in texthigh and textlow.
|
||
The first trick is in partial-stab.h: if we see a static
|
||
or global function, and the textlow for the current pst
|
||
is still 0, then we use that function's address for
|
||
the textlow of the pst. */
|
||
|
||
/* Now, to fill in texthigh, we remember the last function seen
|
||
in the .o file (also in partial-stab.h). Also, there's a hack in
|
||
bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
|
||
to here via the misc_info field. Therefore, we can fill in
|
||
a reliable texthigh by taking the address plus size of the
|
||
last function in the file. */
|
||
|
||
if (pst->texthigh == 0 && last_function_name) {
|
||
char *p;
|
||
int n;
|
||
struct minimal_symbol *minsym;
|
||
|
||
p = strchr (last_function_name, ':');
|
||
if (p == NULL)
|
||
p = last_function_name;
|
||
n = p - last_function_name;
|
||
p = alloca (n + 1);
|
||
strncpy (p, last_function_name, n);
|
||
p[n] = 0;
|
||
|
||
minsym = lookup_minimal_symbol (p, pst->filename, objfile);
|
||
|
||
if (minsym)
|
||
pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) +
|
||
(long) MSYMBOL_INFO (minsym);
|
||
|
||
last_function_name = NULL;
|
||
}
|
||
|
||
/* this test will be true if the last .o file is only data */
|
||
if (pst->textlow == 0)
|
||
/* This loses if the text section really starts at address zero
|
||
(generally true when we are debugging a .o file, for example).
|
||
That is why this whole thing is inside SOFUN_ADDRESS_MAYBE_MISSING. */
|
||
pst->textlow = pst->texthigh;
|
||
|
||
/* If we know our own starting text address, then walk through all other
|
||
psymtabs for this objfile, and if any didn't know their ending text
|
||
address, set it to our starting address. Take care to not set our
|
||
own ending address to our starting address, nor to set addresses on
|
||
`dependency' files that have both textlow and texthigh zero. */
|
||
if (pst->textlow) {
|
||
struct partial_symtab *p1;
|
||
|
||
ALL_OBJFILE_PSYMTABS (objfile, p1) {
|
||
if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) {
|
||
p1->texthigh = pst->textlow;
|
||
/* if this file has only data, then make textlow match texthigh */
|
||
if (p1->textlow == 0)
|
||
p1->textlow = p1->texthigh;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* End of kludge for patching Solaris textlow and texthigh. */
|
||
#endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
|
||
|
||
pst->n_global_syms =
|
||
objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
|
||
pst->n_static_syms =
|
||
objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
|
||
|
||
pst->number_of_dependencies = number_dependencies;
|
||
if (number_dependencies)
|
||
{
|
||
pst->dependencies = (struct partial_symtab **)
|
||
obstack_alloc (&objfile->psymbol_obstack,
|
||
number_dependencies * sizeof (struct partial_symtab *));
|
||
memcpy (pst->dependencies, dependency_list,
|
||
number_dependencies * sizeof (struct partial_symtab *));
|
||
}
|
||
else
|
||
pst->dependencies = 0;
|
||
|
||
for (i = 0; i < num_includes; i++)
|
||
{
|
||
struct partial_symtab *subpst =
|
||
allocate_psymtab (include_list[i], objfile);
|
||
|
||
subpst->section_offsets = pst->section_offsets;
|
||
subpst->read_symtab_private =
|
||
(char *) obstack_alloc (&objfile->psymbol_obstack,
|
||
sizeof (struct symloc));
|
||
LDSYMOFF(subpst) =
|
||
LDSYMLEN(subpst) =
|
||
subpst->textlow =
|
||
subpst->texthigh = 0;
|
||
|
||
/* We could save slight bits of space by only making one of these,
|
||
shared by the entire set of include files. FIXME-someday. */
|
||
subpst->dependencies = (struct partial_symtab **)
|
||
obstack_alloc (&objfile->psymbol_obstack,
|
||
sizeof (struct partial_symtab *));
|
||
subpst->dependencies[0] = pst;
|
||
subpst->number_of_dependencies = 1;
|
||
|
||
subpst->globals_offset =
|
||
subpst->n_global_syms =
|
||
subpst->statics_offset =
|
||
subpst->n_static_syms = 0;
|
||
|
||
subpst->readin = 0;
|
||
subpst->symtab = 0;
|
||
subpst->read_symtab = pst->read_symtab;
|
||
}
|
||
|
||
sort_pst_symbols (pst);
|
||
|
||
/* If there is already a psymtab or symtab for a file of this name, remove it.
|
||
(If there is a symtab, more drastic things also happen.)
|
||
This happens in VxWorks. */
|
||
free_named_symtabs (pst->filename);
|
||
|
||
if (num_includes == 0
|
||
&& number_dependencies == 0
|
||
&& pst->n_global_syms == 0
|
||
&& pst->n_static_syms == 0)
|
||
{
|
||
/* Throw away this psymtab, it's empty. We can't deallocate it, since
|
||
it is on the obstack, but we can forget to chain it on the list. */
|
||
/* Empty psymtabs happen as a result of header files which don't have
|
||
any symbols in them. There can be a lot of them. But this check
|
||
is wrong, in that a psymtab with N_SLINE entries but nothing else
|
||
is not empty, but we don't realize that. Fixing that without slowing
|
||
things down might be tricky. */
|
||
struct partial_symtab *prev_pst;
|
||
|
||
/* First, snip it out of the psymtab chain */
|
||
|
||
if (pst->objfile->psymtabs == pst)
|
||
pst->objfile->psymtabs = pst->next;
|
||
else
|
||
for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next)
|
||
if (prev_pst->next == pst)
|
||
prev_pst->next = pst->next;
|
||
|
||
/* Next, put it on a free list for recycling */
|
||
|
||
pst->next = pst->objfile->free_psymtabs;
|
||
pst->objfile->free_psymtabs = pst;
|
||
|
||
/* Indicate that psymtab was thrown away. */
|
||
pst = (struct partial_symtab *)NULL;
|
||
}
|
||
return pst;
|
||
}
|
||
|
||
static void
|
||
dbx_psymtab_to_symtab_1 (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
struct cleanup *old_chain;
|
||
int i;
|
||
|
||
if (!pst)
|
||
return;
|
||
|
||
if (pst->readin)
|
||
{
|
||
fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
|
||
pst->filename);
|
||
return;
|
||
}
|
||
|
||
/* Read in all partial symtabs on which this one is dependent */
|
||
for (i = 0; i < pst->number_of_dependencies; i++)
|
||
if (!pst->dependencies[i]->readin)
|
||
{
|
||
/* Inform about additional files that need to be read in. */
|
||
if (info_verbose)
|
||
{
|
||
fputs_filtered (" ", gdb_stdout);
|
||
wrap_here ("");
|
||
fputs_filtered ("and ", gdb_stdout);
|
||
wrap_here ("");
|
||
printf_filtered ("%s...", pst->dependencies[i]->filename);
|
||
wrap_here (""); /* Flush output */
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
|
||
}
|
||
|
||
if (LDSYMLEN(pst)) /* Otherwise it's a dummy */
|
||
{
|
||
/* Init stuff necessary for reading in symbols */
|
||
stabsread_init ();
|
||
buildsym_init ();
|
||
old_chain = make_cleanup (really_free_pendings, 0);
|
||
file_string_table_offset = FILE_STRING_OFFSET (pst);
|
||
symbol_size = SYMBOL_SIZE (pst);
|
||
|
||
/* Read in this file's symbols */
|
||
bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
|
||
read_ofile_symtab (pst);
|
||
sort_symtab_syms (pst->symtab);
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
pst->readin = 1;
|
||
}
|
||
|
||
/* Read in all of the symbols for a given psymtab for real.
|
||
Be verbose about it if the user wants that. */
|
||
|
||
static void
|
||
dbx_psymtab_to_symtab (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
bfd *sym_bfd;
|
||
|
||
if (!pst)
|
||
return;
|
||
|
||
if (pst->readin)
|
||
{
|
||
fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
|
||
pst->filename);
|
||
return;
|
||
}
|
||
|
||
if (LDSYMLEN(pst) || pst->number_of_dependencies)
|
||
{
|
||
/* Print the message now, before reading the string table,
|
||
to avoid disconcerting pauses. */
|
||
if (info_verbose)
|
||
{
|
||
printf_filtered ("Reading in symbols for %s...", pst->filename);
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
sym_bfd = pst->objfile->obfd;
|
||
|
||
next_symbol_text_func = dbx_next_symbol_text;
|
||
|
||
dbx_psymtab_to_symtab_1 (pst);
|
||
|
||
/* Match with global symbols. This only needs to be done once,
|
||
after all of the symtabs and dependencies have been read in. */
|
||
scan_file_globals (pst->objfile);
|
||
|
||
/* Finish up the debug error message. */
|
||
if (info_verbose)
|
||
printf_filtered ("done.\n");
|
||
}
|
||
}
|
||
|
||
/* Read in a defined section of a specific object file's symbols. */
|
||
|
||
static void
|
||
read_ofile_symtab (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
register char *namestring;
|
||
register struct internal_nlist *bufp;
|
||
unsigned char type;
|
||
unsigned max_symnum;
|
||
register bfd *abfd;
|
||
struct objfile *objfile;
|
||
int sym_offset; /* Offset to start of symbols to read */
|
||
int sym_size; /* Size of symbols to read */
|
||
CORE_ADDR text_offset; /* Start of text segment for symbols */
|
||
int text_size; /* Size of text segment for symbols */
|
||
struct section_offsets *section_offsets;
|
||
|
||
objfile = pst->objfile;
|
||
sym_offset = LDSYMOFF(pst);
|
||
sym_size = LDSYMLEN(pst);
|
||
text_offset = pst->textlow;
|
||
text_size = pst->texthigh - pst->textlow;
|
||
section_offsets = pst->section_offsets;
|
||
|
||
current_objfile = objfile;
|
||
subfile_stack = NULL;
|
||
|
||
stringtab_global = DBX_STRINGTAB (objfile);
|
||
last_source_file = NULL;
|
||
|
||
abfd = objfile->obfd;
|
||
symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
|
||
symbuf_end = symbuf_idx = 0;
|
||
|
||
/* It is necessary to actually read one symbol *before* the start
|
||
of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
|
||
occurs before the N_SO symbol.
|
||
|
||
Detecting this in read_dbx_symtab
|
||
would slow down initial readin, so we look for it here instead. */
|
||
if (!processing_acc_compilation && sym_offset >= (int)symbol_size)
|
||
{
|
||
bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR);
|
||
fill_symbuf (abfd);
|
||
bufp = &symbuf[symbuf_idx++];
|
||
SWAP_SYMBOL (bufp, abfd);
|
||
|
||
SET_NAMESTRING ();
|
||
|
||
processing_gcc_compilation = 0;
|
||
if (bufp->n_type == N_TEXT)
|
||
{
|
||
const char *tempstring = namestring;
|
||
|
||
if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
|
||
processing_gcc_compilation = 1;
|
||
else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
|
||
processing_gcc_compilation = 2;
|
||
if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
|
||
++tempstring;
|
||
if (STREQN (tempstring, "__gnu_compiled", 14))
|
||
processing_gcc_compilation = 2;
|
||
}
|
||
|
||
/* Try to select a C++ demangling based on the compilation unit
|
||
producer. */
|
||
|
||
if (processing_gcc_compilation)
|
||
{
|
||
if (AUTO_DEMANGLING)
|
||
{
|
||
set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* The N_SO starting this symtab is the first symbol, so we
|
||
better not check the symbol before it. I'm not this can
|
||
happen, but it doesn't hurt to check for it. */
|
||
bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
|
||
processing_gcc_compilation = 0;
|
||
}
|
||
|
||
if (symbuf_idx == symbuf_end)
|
||
fill_symbuf (abfd);
|
||
bufp = &symbuf[symbuf_idx];
|
||
if (bufp->n_type != (unsigned char)N_SO)
|
||
error("First symbol in segment of executable not a source symbol");
|
||
|
||
max_symnum = sym_size / symbol_size;
|
||
|
||
for (symnum = 0;
|
||
symnum < max_symnum;
|
||
symnum++)
|
||
{
|
||
QUIT; /* Allow this to be interruptable */
|
||
if (symbuf_idx == symbuf_end)
|
||
fill_symbuf(abfd);
|
||
bufp = &symbuf[symbuf_idx++];
|
||
SWAP_SYMBOL (bufp, abfd);
|
||
|
||
type = bufp->n_type;
|
||
|
||
SET_NAMESTRING ();
|
||
|
||
if (type & N_STAB) {
|
||
process_one_symbol (type, bufp->n_desc, bufp->n_value,
|
||
namestring, section_offsets, objfile);
|
||
}
|
||
/* We skip checking for a new .o or -l file; that should never
|
||
happen in this routine. */
|
||
else if (type == N_TEXT)
|
||
{
|
||
/* I don't think this code will ever be executed, because
|
||
the GCC_COMPILED_FLAG_SYMBOL usually is right before
|
||
the N_SO symbol which starts this source file.
|
||
However, there is no reason not to accept
|
||
the GCC_COMPILED_FLAG_SYMBOL anywhere. */
|
||
|
||
if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
|
||
processing_gcc_compilation = 1;
|
||
else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
|
||
processing_gcc_compilation = 2;
|
||
|
||
if (AUTO_DEMANGLING)
|
||
{
|
||
set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
|
||
}
|
||
}
|
||
else if (type & N_EXT || type == (unsigned char)N_TEXT
|
||
|| type == (unsigned char)N_NBTEXT
|
||
) {
|
||
/* Global symbol: see if we came across a dbx defintion for
|
||
a corresponding symbol. If so, store the value. Remove
|
||
syms from the chain when their values are stored, but
|
||
search the whole chain, as there may be several syms from
|
||
different files with the same name. */
|
||
/* This is probably not true. Since the files will be read
|
||
in one at a time, each reference to a global symbol will
|
||
be satisfied in each file as it appears. So we skip this
|
||
section. */
|
||
;
|
||
}
|
||
}
|
||
|
||
current_objfile = NULL;
|
||
|
||
/* In a Solaris elf file, this variable, which comes from the
|
||
value of the N_SO symbol, will still be 0. Luckily, text_offset,
|
||
which comes from pst->textlow is correct. */
|
||
if (last_source_start_addr == 0)
|
||
last_source_start_addr = text_offset;
|
||
|
||
pst->symtab = end_symtab (text_offset + text_size, 0, 0, objfile,
|
||
SECT_OFF_TEXT);
|
||
end_stabs ();
|
||
}
|
||
|
||
|
||
/* This handles a single symbol from the symbol-file, building symbols
|
||
into a GDB symtab. It takes these arguments and an implicit argument.
|
||
|
||
TYPE is the type field of the ".stab" symbol entry.
|
||
DESC is the desc field of the ".stab" entry.
|
||
VALU is the value field of the ".stab" entry.
|
||
NAME is the symbol name, in our address space.
|
||
SECTION_OFFSETS is a set of amounts by which the sections of this object
|
||
file were relocated when it was loaded into memory.
|
||
All symbols that refer
|
||
to memory locations need to be offset by these amounts.
|
||
OBJFILE is the object file from which we are reading symbols.
|
||
It is used in end_symtab. */
|
||
|
||
void
|
||
process_one_symbol (type, desc, valu, name, section_offsets, objfile)
|
||
int type, desc;
|
||
CORE_ADDR valu;
|
||
char *name;
|
||
struct section_offsets *section_offsets;
|
||
struct objfile *objfile;
|
||
{
|
||
#ifdef SUN_FIXED_LBRAC_BUG
|
||
/* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
|
||
to correct the address of N_LBRAC's. If it is not defined, then
|
||
we never need to correct the addresses. */
|
||
|
||
/* This records the last pc address we've seen. We depend on there being
|
||
an SLINE or FUN or SO before the first LBRAC, since the variable does
|
||
not get reset in between reads of different symbol files. */
|
||
static CORE_ADDR last_pc_address;
|
||
#endif
|
||
|
||
register struct context_stack *new;
|
||
/* This remembers the address of the start of a function. It is used
|
||
because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
|
||
relative to the current function's start address. On systems
|
||
other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
|
||
used to relocate these symbol types rather than SECTION_OFFSETS. */
|
||
static CORE_ADDR function_start_offset;
|
||
|
||
/* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
|
||
file. Used to detect the SunPRO solaris compiler. */
|
||
static int n_opt_found;
|
||
|
||
/* The stab type used for the definition of the last function.
|
||
N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
|
||
static int function_stab_type = 0;
|
||
|
||
if (!block_address_function_relative)
|
||
/* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
|
||
function start address, so just use the text offset. */
|
||
function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
|
||
/* Something is wrong if we see real data before
|
||
seeing a source file name. */
|
||
|
||
if (last_source_file == NULL && type != (unsigned char)N_SO)
|
||
{
|
||
/* Ignore any symbols which appear before an N_SO symbol. Currently
|
||
no one puts symbols there, but we should deal gracefully with the
|
||
case. A complain()t might be in order (if !IGNORE_SYMBOL (type)),
|
||
but this should not be an error (). */
|
||
return;
|
||
}
|
||
|
||
switch (type)
|
||
{
|
||
case N_FUN:
|
||
case N_FNAME:
|
||
/* Relocate for dynamic loading */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
goto define_a_symbol;
|
||
|
||
case N_LBRAC:
|
||
/* This "symbol" just indicates the start of an inner lexical
|
||
context within a function. */
|
||
|
||
/* Ignore extra outermost context from SunPRO cc and acc. */
|
||
if (n_opt_found && desc == 1)
|
||
break;
|
||
|
||
#if defined(BLOCK_ADDRESS_ABSOLUTE)
|
||
/* Relocate for dynamic loading (?). */
|
||
valu += function_start_offset;
|
||
#else
|
||
if (block_address_function_relative)
|
||
/* Relocate for Sun ELF acc fn-relative syms. */
|
||
valu += function_start_offset;
|
||
else
|
||
/* On most machines, the block addresses are relative to the
|
||
N_SO, the linker did not relocate them (sigh). */
|
||
valu += last_source_start_addr;
|
||
#endif
|
||
|
||
#ifdef SUN_FIXED_LBRAC_BUG
|
||
if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address) {
|
||
/* Patch current LBRAC pc value to match last handy pc value */
|
||
complain (&lbrac_complaint);
|
||
valu = last_pc_address;
|
||
}
|
||
#endif
|
||
new = push_context (desc, valu);
|
||
break;
|
||
|
||
case N_RBRAC:
|
||
/* This "symbol" just indicates the end of an inner lexical
|
||
context that was started with N_LBRAC. */
|
||
|
||
/* Ignore extra outermost context from SunPRO cc and acc. */
|
||
if (n_opt_found && desc == 1)
|
||
break;
|
||
|
||
#if defined(BLOCK_ADDRESS_ABSOLUTE)
|
||
/* Relocate for dynamic loading (?). */
|
||
valu += function_start_offset;
|
||
#else
|
||
if (block_address_function_relative)
|
||
/* Relocate for Sun ELF acc fn-relative syms. */
|
||
valu += function_start_offset;
|
||
else
|
||
/* On most machines, the block addresses are relative to the
|
||
N_SO, the linker did not relocate them (sigh). */
|
||
valu += last_source_start_addr;
|
||
#endif
|
||
|
||
new = pop_context();
|
||
if (desc != new->depth)
|
||
complain (&lbrac_mismatch_complaint, symnum);
|
||
|
||
/* Some compilers put the variable decls inside of an
|
||
LBRAC/RBRAC block. This macro should be nonzero if this
|
||
is true. DESC is N_DESC from the N_RBRAC symbol.
|
||
GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
|
||
or the GCC2_COMPILED_SYMBOL. */
|
||
#if !defined (VARIABLES_INSIDE_BLOCK)
|
||
#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
|
||
#endif
|
||
|
||
/* Can only use new->locals as local symbols here if we're in
|
||
gcc or on a machine that puts them before the lbrack. */
|
||
if (!VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
|
||
local_symbols = new->locals;
|
||
|
||
if (context_stack_depth
|
||
> !VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
|
||
{
|
||
/* This is not the outermost LBRAC...RBRAC pair in the function,
|
||
its local symbols preceded it, and are the ones just recovered
|
||
from the context stack. Define the block for them (but don't
|
||
bother if the block contains no symbols. Should we complain
|
||
on blocks without symbols? I can't think of any useful purpose
|
||
for them). */
|
||
if (local_symbols != NULL)
|
||
{
|
||
/* Muzzle a compiler bug that makes end < start. (which
|
||
compilers? Is this ever harmful?). */
|
||
if (new->start_addr > valu)
|
||
{
|
||
complain (&lbrac_rbrac_complaint);
|
||
new->start_addr = valu;
|
||
}
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (0, &local_symbols, new->old_blocks,
|
||
new->start_addr, valu, objfile);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* This is the outermost LBRAC...RBRAC pair. There is no
|
||
need to do anything; leave the symbols that preceded it
|
||
to be attached to the function's own block. We need to
|
||
indicate that we just moved outside of the function. */
|
||
within_function = 0;
|
||
}
|
||
|
||
if (VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
|
||
/* Now pop locals of block just finished. */
|
||
local_symbols = new->locals;
|
||
break;
|
||
|
||
case N_FN:
|
||
case N_FN_SEQ:
|
||
/* This kind of symbol indicates the start of an object file. */
|
||
/* Relocate for dynamic loading */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
break;
|
||
|
||
case N_SO:
|
||
/* This type of symbol indicates the start of data
|
||
for one source file.
|
||
Finish the symbol table of the previous source file
|
||
(if any) and start accumulating a new symbol table. */
|
||
/* Relocate for dynamic loading */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
|
||
n_opt_found = 0;
|
||
|
||
#ifdef SUN_FIXED_LBRAC_BUG
|
||
last_pc_address = valu; /* Save for SunOS bug circumcision */
|
||
#endif
|
||
|
||
#ifdef PCC_SOL_BROKEN
|
||
/* pcc bug, occasionally puts out SO for SOL. */
|
||
if (context_stack_depth > 0)
|
||
{
|
||
start_subfile (name, NULL);
|
||
break;
|
||
}
|
||
#endif
|
||
if (last_source_file)
|
||
{
|
||
/* Check if previous symbol was also an N_SO (with some
|
||
sanity checks). If so, that one was actually the directory
|
||
name, and the current one is the real file name.
|
||
Patch things up. */
|
||
if (previous_stab_code == (unsigned char) N_SO)
|
||
{
|
||
patch_subfile_names (current_subfile, name);
|
||
break; /* Ignore repeated SOs */
|
||
}
|
||
end_symtab (valu, 0, 0, objfile, SECT_OFF_TEXT);
|
||
end_stabs ();
|
||
}
|
||
|
||
/* Null name means this just marks the end of text for this .o file.
|
||
Don't start a new symtab in this case. */
|
||
if (*name == '\000')
|
||
break;
|
||
|
||
start_stabs ();
|
||
start_symtab (name, NULL, valu);
|
||
break;
|
||
|
||
case N_SOL:
|
||
/* This type of symbol indicates the start of data for
|
||
a sub-source-file, one whose contents were copied or
|
||
included in the compilation of the main source file
|
||
(whose name was given in the N_SO symbol.) */
|
||
/* Relocate for dynamic loading */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
start_subfile (name, current_subfile->dirname);
|
||
break;
|
||
|
||
case N_BINCL:
|
||
push_subfile ();
|
||
add_new_header_file (name, valu);
|
||
start_subfile (name, current_subfile->dirname);
|
||
break;
|
||
|
||
case N_EINCL:
|
||
start_subfile (pop_subfile (), current_subfile->dirname);
|
||
break;
|
||
|
||
case N_EXCL:
|
||
add_old_header_file (name, valu);
|
||
break;
|
||
|
||
case N_SLINE:
|
||
/* This type of "symbol" really just records
|
||
one line-number -- core-address correspondence.
|
||
Enter it in the line list for this symbol table. */
|
||
/* Relocate for dynamic loading and for ELF acc fn-relative syms. */
|
||
valu += function_start_offset;
|
||
#ifdef SUN_FIXED_LBRAC_BUG
|
||
last_pc_address = valu; /* Save for SunOS bug circumcision */
|
||
#endif
|
||
record_line (current_subfile, desc, valu);
|
||
break;
|
||
|
||
case N_BCOMM:
|
||
common_block_start (name, objfile);
|
||
break;
|
||
|
||
case N_ECOMM:
|
||
common_block_end (objfile);
|
||
break;
|
||
|
||
/* The following symbol types need to have the appropriate offset added
|
||
to their value; then we process symbol definitions in the name. */
|
||
|
||
case N_STSYM: /* Static symbol in data seg */
|
||
case N_LCSYM: /* Static symbol in BSS seg */
|
||
case N_ROSYM: /* Static symbol in Read-only data seg */
|
||
/* HORRID HACK DEPT. However, it's Sun's furgin' fault.
|
||
Solaris2's stabs-in-elf makes *most* symbols relative
|
||
but leaves a few absolute (at least for Solaris 2.1 and version
|
||
2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
|
||
.stab "foo:S...",N_STSYM is absolute (ld relocates it)
|
||
.stab "foo:V...",N_STSYM is relative (section base subtracted).
|
||
This leaves us no choice but to search for the 'S' or 'V'...
|
||
(or pass the whole section_offsets stuff down ONE MORE function
|
||
call level, which we really don't want to do). */
|
||
{
|
||
char *p;
|
||
|
||
/* .o files and NLMs have non-zero text seg offsets, but don't need
|
||
their static syms offset in this fashion. XXX - This is really a
|
||
crock that should be fixed in the solib handling code so that I
|
||
don't have to work around it here. */
|
||
|
||
if (!symfile_relocatable)
|
||
{
|
||
p = strchr (name, ':');
|
||
if (p != 0 && p[1] == 'S')
|
||
{
|
||
/* The linker relocated it. We don't want to add an
|
||
elfstab_offset_sections-type offset, but we *do* want
|
||
to add whatever solib.c passed to symbol_file_add as
|
||
addr (this is known to affect SunOS4, and I suspect ELF
|
||
too). Since elfstab_offset_sections currently does not
|
||
muck with the text offset (there is no Ttext.text
|
||
symbol), we can get addr from the text offset. If
|
||
elfstab_offset_sections ever starts dealing with the
|
||
text offset, and we still need to do this, we need to
|
||
invent a SECT_OFF_ADDR_KLUDGE or something. */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
goto define_a_symbol;
|
||
}
|
||
}
|
||
/* Since it's not the kludge case, re-dispatch to the right handler. */
|
||
switch (type) {
|
||
case N_STSYM: goto case_N_STSYM;
|
||
case N_LCSYM: goto case_N_LCSYM;
|
||
case N_ROSYM: goto case_N_ROSYM;
|
||
default: abort();
|
||
}
|
||
}
|
||
|
||
case_N_STSYM: /* Static symbol in data seg */
|
||
case N_DSLINE: /* Source line number, data seg */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_DATA);
|
||
goto define_a_symbol;
|
||
|
||
case_N_LCSYM: /* Static symbol in BSS seg */
|
||
case N_BSLINE: /* Source line number, bss seg */
|
||
/* N_BROWS: overlaps with N_BSLINE */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_BSS);
|
||
goto define_a_symbol;
|
||
|
||
case_N_ROSYM: /* Static symbol in Read-only data seg */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_RODATA);
|
||
goto define_a_symbol;
|
||
|
||
case N_ENTRY: /* Alternate entry point */
|
||
/* Relocate for dynamic loading */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
goto define_a_symbol;
|
||
|
||
/* The following symbol types we don't know how to process. Handle
|
||
them in a "default" way, but complain to people who care. */
|
||
default:
|
||
case N_CATCH: /* Exception handler catcher */
|
||
case N_EHDECL: /* Exception handler name */
|
||
case N_PC: /* Global symbol in Pascal */
|
||
case N_M2C: /* Modula-2 compilation unit */
|
||
/* N_MOD2: overlaps with N_EHDECL */
|
||
case N_SCOPE: /* Modula-2 scope information */
|
||
case N_ECOML: /* End common (local name) */
|
||
case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
|
||
case N_NBDATA:
|
||
case N_NBBSS:
|
||
case N_NBSTS:
|
||
case N_NBLCS:
|
||
complain (&unknown_symtype_complaint, local_hex_string (type));
|
||
/* FALLTHROUGH */
|
||
|
||
/* The following symbol types don't need the address field relocated,
|
||
since it is either unused, or is absolute. */
|
||
define_a_symbol:
|
||
case N_GSYM: /* Global variable */
|
||
case N_NSYMS: /* Number of symbols (ultrix) */
|
||
case N_NOMAP: /* No map? (ultrix) */
|
||
case N_RSYM: /* Register variable */
|
||
case N_DEFD: /* Modula-2 GNU module dependency */
|
||
case N_SSYM: /* Struct or union element */
|
||
case N_LSYM: /* Local symbol in stack */
|
||
case N_PSYM: /* Parameter variable */
|
||
case N_LENG: /* Length of preceding symbol type */
|
||
if (name)
|
||
{
|
||
int deftype;
|
||
char *colon_pos = strchr (name, ':');
|
||
if (colon_pos == NULL)
|
||
deftype = '\0';
|
||
else
|
||
deftype = colon_pos[1];
|
||
|
||
switch (deftype)
|
||
{
|
||
case 'f':
|
||
case 'F':
|
||
function_stab_type = type;
|
||
|
||
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
|
||
/* Deal with the SunPRO 3.0 compiler which omits the address
|
||
from N_FUN symbols. */
|
||
if (type == N_FUN
|
||
&& valu == ANOFFSET (section_offsets, SECT_OFF_TEXT))
|
||
{
|
||
struct minimal_symbol *msym;
|
||
char *p;
|
||
int n;
|
||
|
||
p = strchr (name, ':');
|
||
if (p == NULL)
|
||
p = name;
|
||
n = p - name;
|
||
p = alloca (n + 1);
|
||
strncpy (p, name, n);
|
||
p[n] = 0;
|
||
|
||
msym = lookup_minimal_symbol (p, last_source_file,
|
||
objfile);
|
||
if (msym)
|
||
valu = SYMBOL_VALUE_ADDRESS (msym);
|
||
}
|
||
#endif
|
||
|
||
#ifdef SUN_FIXED_LBRAC_BUG
|
||
/* The Sun acc compiler, under SunOS4, puts out
|
||
functions with N_GSYM or N_STSYM. The problem is
|
||
that the address of the symbol is no good (for N_GSYM
|
||
it doesn't even attept an address; for N_STSYM it
|
||
puts out an address but then it gets relocated
|
||
relative to the data segment, not the text segment).
|
||
Currently we can't fix this up later as we do for
|
||
some types of symbol in scan_file_globals.
|
||
Fortunately we do have a way of finding the address -
|
||
we know that the value in last_pc_address is either
|
||
the one we want (if we're dealing with the first
|
||
function in an object file), or somewhere in the
|
||
previous function. This means that we can use the
|
||
minimal symbol table to get the address. */
|
||
|
||
/* Starting with release 3.0, the Sun acc compiler,
|
||
under SunOS4, puts out functions with N_FUN and a value
|
||
of zero. This gets relocated to the start of the text
|
||
segment of the module, which is no good either.
|
||
Under SunOS4 we can deal with this as N_SLINE and N_SO
|
||
entries contain valid absolute addresses.
|
||
Release 3.0 acc also puts out N_OPT entries, which makes
|
||
it possible to discern acc from cc or gcc. */
|
||
|
||
if (type == N_GSYM || type == N_STSYM
|
||
|| (type == N_FUN
|
||
&& n_opt_found && !block_address_function_relative))
|
||
{
|
||
struct minimal_symbol *m;
|
||
int l = colon_pos - name;
|
||
|
||
m = lookup_minimal_symbol_by_pc (last_pc_address);
|
||
if (m && STREQN (SYMBOL_NAME (m), name, l)
|
||
&& SYMBOL_NAME (m) [l] == '\0')
|
||
/* last_pc_address was in this function */
|
||
valu = SYMBOL_VALUE (m);
|
||
else if (m && STREQN (SYMBOL_NAME (m+1), name, l)
|
||
&& SYMBOL_NAME (m+1) [l] == '\0')
|
||
/* last_pc_address was in last function */
|
||
valu = SYMBOL_VALUE (m+1);
|
||
else
|
||
/* Not found - use last_pc_address (for finish_block) */
|
||
valu = last_pc_address;
|
||
}
|
||
|
||
last_pc_address = valu; /* Save for SunOS bug circumcision */
|
||
#endif
|
||
|
||
if (block_address_function_relative)
|
||
/* For Solaris 2.0 compilers, the block addresses and
|
||
N_SLINE's are relative to the start of the
|
||
function. On normal systems, and when using gcc on
|
||
Solaris 2.0, these addresses are just absolute, or
|
||
relative to the N_SO, depending on
|
||
BLOCK_ADDRESS_ABSOLUTE. */
|
||
function_start_offset = valu;
|
||
|
||
within_function = 1;
|
||
if (context_stack_depth > 0)
|
||
{
|
||
new = pop_context ();
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (new->name, &local_symbols, new->old_blocks,
|
||
new->start_addr, valu, objfile);
|
||
}
|
||
/* Stack must be empty now. */
|
||
if (context_stack_depth != 0)
|
||
complain (&lbrac_unmatched_complaint, symnum);
|
||
|
||
new = push_context (0, valu);
|
||
new->name = define_symbol (valu, name, desc, type, objfile);
|
||
break;
|
||
|
||
default:
|
||
define_symbol (valu, name, desc, type, objfile);
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
|
||
/* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
|
||
for a bunch of other flags, too. Someday we may parse their
|
||
flags; for now we ignore theirs and hope they'll ignore ours. */
|
||
case N_OPT: /* Solaris 2: Compiler options */
|
||
if (name)
|
||
{
|
||
if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL))
|
||
{
|
||
processing_gcc_compilation = 2;
|
||
#if 1 /* Works, but is experimental. -fnf */
|
||
if (AUTO_DEMANGLING)
|
||
{
|
||
set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
|
||
}
|
||
#endif
|
||
}
|
||
else
|
||
n_opt_found = 1;
|
||
}
|
||
break;
|
||
|
||
/* The following symbol types can be ignored. */
|
||
case N_OBJ: /* Solaris 2: Object file dir and name */
|
||
/* N_UNDF: Solaris 2: file separator mark */
|
||
/* N_UNDF: -- we will never encounter it, since we only process one
|
||
file's symbols at once. */
|
||
case N_ENDM: /* Solaris 2: End of module */
|
||
case N_MAIN: /* Name of main routine. */
|
||
break;
|
||
}
|
||
|
||
previous_stab_code = type;
|
||
}
|
||
|
||
/* FIXME: The only difference between this and elfstab_build_psymtabs
|
||
is the call to install_minimal_symbols for elf, and the support for
|
||
split sections. If the differences are really that small, the code
|
||
should be shared. */
|
||
|
||
/* Scan and build partial symbols for an coff symbol file.
|
||
The coff file has already been processed to get its minimal symbols.
|
||
|
||
This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
|
||
rolled into one.
|
||
|
||
OBJFILE is the object file we are reading symbols from.
|
||
ADDR is the address relative to which the symbols are (e.g.
|
||
the base address of the text segment).
|
||
MAINLINE is true if we are reading the main symbol
|
||
table (as opposed to a shared lib or dynamically loaded file).
|
||
TEXTADDR is the address of the text section.
|
||
TEXTSIZE is the size of the text section.
|
||
STABSECTS is the list of .stab sections in OBJFILE.
|
||
STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
|
||
.stabstr section exists.
|
||
|
||
This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
|
||
adjusted for coff details. */
|
||
|
||
void
|
||
coffstab_build_psymtabs (objfile, section_offsets, mainline,
|
||
textaddr, textsize, stabsects,
|
||
stabstroffset, stabstrsize)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
int mainline;
|
||
CORE_ADDR textaddr;
|
||
unsigned int textsize;
|
||
struct stab_section_list *stabsects;
|
||
file_ptr stabstroffset;
|
||
unsigned int stabstrsize;
|
||
{
|
||
int val;
|
||
bfd *sym_bfd = objfile->obfd;
|
||
char *name = bfd_get_filename (sym_bfd);
|
||
struct dbx_symfile_info *info;
|
||
unsigned int stabsize;
|
||
|
||
/* There is already a dbx_symfile_info allocated by our caller.
|
||
It might even contain some info from the coff symtab to help us. */
|
||
info = (struct dbx_symfile_info *) objfile->sym_stab_info;
|
||
|
||
DBX_TEXT_ADDR (objfile) = textaddr;
|
||
DBX_TEXT_SIZE (objfile) = textsize;
|
||
|
||
#define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
|
||
DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
|
||
DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
|
||
|
||
if (stabstrsize > bfd_get_size (sym_bfd))
|
||
error ("ridiculous string table size: %d bytes", stabstrsize);
|
||
DBX_STRINGTAB (objfile) = (char *)
|
||
obstack_alloc (&objfile->psymbol_obstack, stabstrsize+1);
|
||
|
||
/* Now read in the string table in one big gulp. */
|
||
|
||
val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
|
||
if (val < 0)
|
||
perror_with_name (name);
|
||
val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd);
|
||
if (val != stabstrsize)
|
||
perror_with_name (name);
|
||
|
||
stabsread_new_init ();
|
||
buildsym_new_init ();
|
||
free_header_files ();
|
||
init_header_files ();
|
||
|
||
processing_acc_compilation = 1;
|
||
|
||
/* In a coff file, we've already installed the minimal symbols that came
|
||
from the coff (non-stab) symbol table, so always act like an
|
||
incremental load here. */
|
||
if (stabsects->next == NULL)
|
||
{
|
||
stabsize = bfd_section_size (sym_bfd, stabsects->section);
|
||
DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
|
||
DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
|
||
}
|
||
else
|
||
{
|
||
struct stab_section_list *stabsect;
|
||
|
||
DBX_SYMCOUNT (objfile) = 0;
|
||
for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
|
||
{
|
||
stabsize = bfd_section_size (sym_bfd, stabsect->section);
|
||
DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
|
||
}
|
||
|
||
DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
|
||
|
||
symbuf_sections = stabsects->next;
|
||
symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
|
||
symbuf_read = 0;
|
||
}
|
||
|
||
dbx_symfile_read (objfile, section_offsets, 0);
|
||
}
|
||
|
||
/* Scan and build partial symbols for an ELF symbol file.
|
||
This ELF file has already been processed to get its minimal symbols,
|
||
and any DWARF symbols that were in it.
|
||
|
||
This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
|
||
rolled into one.
|
||
|
||
OBJFILE is the object file we are reading symbols from.
|
||
ADDR is the address relative to which the symbols are (e.g.
|
||
the base address of the text segment).
|
||
MAINLINE is true if we are reading the main symbol
|
||
table (as opposed to a shared lib or dynamically loaded file).
|
||
STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
|
||
section exists.
|
||
STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
|
||
.stabstr section exists.
|
||
|
||
This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
|
||
adjusted for elf details. */
|
||
|
||
void
|
||
elfstab_build_psymtabs (objfile, section_offsets, mainline,
|
||
staboffset, stabsize,
|
||
stabstroffset, stabstrsize)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
int mainline;
|
||
file_ptr staboffset;
|
||
unsigned int stabsize;
|
||
file_ptr stabstroffset;
|
||
unsigned int stabstrsize;
|
||
{
|
||
int val;
|
||
bfd *sym_bfd = objfile->obfd;
|
||
char *name = bfd_get_filename (sym_bfd);
|
||
struct dbx_symfile_info *info;
|
||
asection *text_sect;
|
||
|
||
/* There is already a dbx_symfile_info allocated by our caller.
|
||
It might even contain some info from the ELF symtab to help us. */
|
||
info = (struct dbx_symfile_info *) objfile->sym_stab_info;
|
||
|
||
text_sect = bfd_get_section_by_name (sym_bfd, ".text");
|
||
if (!text_sect)
|
||
error ("Can't find .text section in symbol file");
|
||
DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
|
||
DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
|
||
|
||
#define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
|
||
DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
|
||
DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
|
||
DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
|
||
DBX_SYMTAB_OFFSET (objfile) = staboffset;
|
||
|
||
if (stabstrsize > bfd_get_size (sym_bfd))
|
||
error ("ridiculous string table size: %d bytes", stabstrsize);
|
||
DBX_STRINGTAB (objfile) = (char *)
|
||
obstack_alloc (&objfile->psymbol_obstack, stabstrsize+1);
|
||
|
||
/* Now read in the string table in one big gulp. */
|
||
|
||
val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
|
||
if (val < 0)
|
||
perror_with_name (name);
|
||
val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd);
|
||
if (val != stabstrsize)
|
||
perror_with_name (name);
|
||
|
||
stabsread_new_init ();
|
||
buildsym_new_init ();
|
||
free_header_files ();
|
||
init_header_files ();
|
||
install_minimal_symbols (objfile);
|
||
|
||
processing_acc_compilation = 1;
|
||
|
||
/* In an elf file, we've already installed the minimal symbols that came
|
||
from the elf (non-stab) symbol table, so always act like an
|
||
incremental load here. */
|
||
dbx_symfile_read (objfile, section_offsets, 0);
|
||
}
|
||
|
||
/* Scan and build partial symbols for a file with special sections for stabs
|
||
and stabstrings. The file has already been processed to get its minimal
|
||
symbols, and any other symbols that might be necessary to resolve GSYMs.
|
||
|
||
This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
|
||
rolled into one.
|
||
|
||
OBJFILE is the object file we are reading symbols from.
|
||
ADDR is the address relative to which the symbols are (e.g. the base address
|
||
of the text segment).
|
||
MAINLINE is true if we are reading the main symbol table (as opposed to a
|
||
shared lib or dynamically loaded file).
|
||
STAB_NAME is the name of the section that contains the stabs.
|
||
STABSTR_NAME is the name of the section that contains the stab strings.
|
||
|
||
This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
|
||
|
||
void
|
||
stabsect_build_psymtabs (objfile, section_offsets, mainline, stab_name,
|
||
stabstr_name, text_name)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
int mainline;
|
||
char *stab_name;
|
||
char *stabstr_name;
|
||
char *text_name;
|
||
{
|
||
int val;
|
||
bfd *sym_bfd = objfile->obfd;
|
||
char *name = bfd_get_filename (sym_bfd);
|
||
asection *stabsect;
|
||
asection *stabstrsect;
|
||
asection *text_sect;
|
||
|
||
stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
|
||
stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
|
||
|
||
if (!stabsect)
|
||
return;
|
||
|
||
if (!stabstrsect)
|
||
error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
|
||
stab_name, stabstr_name);
|
||
|
||
objfile->sym_stab_info = (PTR) xmalloc (sizeof (struct dbx_symfile_info));
|
||
memset (DBX_SYMFILE_INFO (objfile), 0, sizeof (struct dbx_symfile_info));
|
||
|
||
text_sect = bfd_get_section_by_name (sym_bfd, text_name);
|
||
if (!text_sect)
|
||
error ("Can't find %s section in symbol file", text_name);
|
||
DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
|
||
DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
|
||
|
||
DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
|
||
DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
|
||
/ DBX_SYMBOL_SIZE (objfile);
|
||
DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
|
||
DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
|
||
|
||
if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
|
||
error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile));
|
||
DBX_STRINGTAB (objfile) = (char *)
|
||
obstack_alloc (&objfile->psymbol_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
|
||
|
||
/* Now read in the string table in one big gulp. */
|
||
|
||
val = bfd_get_section_contents (sym_bfd, /* bfd */
|
||
stabstrsect, /* bfd section */
|
||
DBX_STRINGTAB (objfile), /* input buffer */
|
||
0, /* offset into section */
|
||
DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
|
||
|
||
if (!val)
|
||
perror_with_name (name);
|
||
|
||
stabsread_new_init ();
|
||
buildsym_new_init ();
|
||
free_header_files ();
|
||
init_header_files ();
|
||
install_minimal_symbols (objfile);
|
||
|
||
/* Now, do an incremental load */
|
||
|
||
processing_acc_compilation = 1;
|
||
dbx_symfile_read (objfile, section_offsets, 0);
|
||
}
|
||
|
||
/* Parse the user's idea of an offset for dynamic linking, into our idea
|
||
of how to represent it for fast symbol reading. */
|
||
|
||
static struct section_offsets *
|
||
dbx_symfile_offsets (objfile, addr)
|
||
struct objfile *objfile;
|
||
CORE_ADDR addr;
|
||
{
|
||
struct section_offsets *section_offsets;
|
||
int i;
|
||
|
||
objfile->num_sections = SECT_OFF_MAX;
|
||
section_offsets = (struct section_offsets *)
|
||
obstack_alloc (&objfile -> psymbol_obstack,
|
||
sizeof (struct section_offsets)
|
||
+ sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
|
||
|
||
for (i = 0; i < SECT_OFF_MAX; i++)
|
||
ANOFFSET (section_offsets, i) = addr;
|
||
|
||
return section_offsets;
|
||
}
|
||
|
||
static struct sym_fns aout_sym_fns =
|
||
{
|
||
bfd_target_aout_flavour,
|
||
dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
|
||
dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
|
||
dbx_symfile_read, /* sym_read: read a symbol file into symtab */
|
||
dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
|
||
dbx_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
|
||
NULL /* next: pointer to next struct sym_fns */
|
||
};
|
||
|
||
void
|
||
_initialize_dbxread ()
|
||
{
|
||
add_symtab_fns(&aout_sym_fns);
|
||
}
|