385 lines
13 KiB
C
385 lines
13 KiB
C
/* BFD back end for traditional Unix core files (U-area and raw sections)
|
||
Copyright 1988, 1989, 1991, 1992, 1993 Free Software Foundation, Inc.
|
||
Written by John Gilmore of Cygnus Support.
|
||
|
||
This file is part of BFD, the Binary File Descriptor library.
|
||
|
||
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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
||
$Id: trad-core.c,v 1.3 1994/06/24 06:57:52 pk Exp $
|
||
*/
|
||
|
||
/* To use this file on a particular host, configure the host with these
|
||
parameters in the config/h-HOST file:
|
||
|
||
HDEFINES=-DTRAD_CORE
|
||
HDEPFILES=trad-core.o
|
||
|
||
*/
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "libbfd.h"
|
||
#include "libaout.h" /* BFD a.out internal data structures */
|
||
|
||
#include <stdio.h>
|
||
#include <sys/types.h>
|
||
#include <sys/param.h>
|
||
#include <sys/dir.h>
|
||
#include <signal.h>
|
||
|
||
#include <sys/user.h> /* After a.out.h */
|
||
#if 0
|
||
/* file.h is included by std-host.h. So we better not try to include it
|
||
twice; on some systems (dpx2) it is not protected against multiple
|
||
inclusion. I have checked that all the hosts which use this file
|
||
include sys/file.h in the hosts file. */
|
||
#include <sys/file.h>
|
||
#endif
|
||
|
||
#include <errno.h>
|
||
|
||
struct trad_core_struct
|
||
{
|
||
asection *data_section;
|
||
asection *stack_section;
|
||
asection *reg_section;
|
||
struct user u;
|
||
} *rawptr;
|
||
|
||
#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
|
||
#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
|
||
#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
|
||
#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
|
||
|
||
/* forward declarations */
|
||
|
||
bfd_target * trad_unix_core_file_p PARAMS ((bfd *abfd));
|
||
char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd));
|
||
int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd));
|
||
boolean trad_unix_core_file_matches_executable_p
|
||
PARAMS ((bfd *core_bfd, bfd *exec_bfd));
|
||
|
||
/* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
|
||
|
||
/* ARGSUSED */
|
||
bfd_target *
|
||
trad_unix_core_file_p (abfd)
|
||
bfd *abfd;
|
||
|
||
{
|
||
int val;
|
||
struct user u;
|
||
|
||
#ifdef TRAD_CORE_USER_OFFSET
|
||
/* If defined, this macro is the file position of the user struct. */
|
||
if (bfd_seek (abfd, TRAD_CORE_USER_OFFSET, SEEK_SET) == 0)
|
||
return 0;
|
||
#endif
|
||
|
||
val = bfd_read ((void *)&u, 1, sizeof u, abfd);
|
||
if (val != sizeof u)
|
||
{
|
||
/* Too small to be a core file */
|
||
bfd_error = wrong_format;
|
||
return 0;
|
||
}
|
||
|
||
/* Sanity check perhaps??? */
|
||
if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
|
||
{
|
||
bfd_error = wrong_format;
|
||
return 0;
|
||
}
|
||
if (u.u_ssize > 0x1000000)
|
||
{
|
||
bfd_error = wrong_format;
|
||
return 0;
|
||
}
|
||
|
||
/* Check that the size claimed is no greater than the file size. */
|
||
{
|
||
FILE *stream = bfd_cache_lookup (abfd);
|
||
struct stat statbuf;
|
||
if (stream == NULL)
|
||
return 0;
|
||
if (fstat (fileno (stream), &statbuf) < 0)
|
||
{
|
||
bfd_error = system_call_error;
|
||
return 0;
|
||
}
|
||
if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
|
||
{
|
||
bfd_error = wrong_format;
|
||
return 0;
|
||
}
|
||
if (NBPG * (UPAGES + u.u_dsize + u.u_ssize)
|
||
#ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
|
||
/* Some systems write the file too big. */
|
||
+ TRAD_CORE_EXTRA_SIZE_ALLOWED
|
||
#endif
|
||
< statbuf.st_size)
|
||
{
|
||
/* The file is too big. Maybe it's not a core file
|
||
or we otherwise have bad values for u_dsize and u_ssize). */
|
||
bfd_error = wrong_format;
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* OK, we believe you. You're a core file (sure, sure). */
|
||
|
||
/* Allocate both the upage and the struct core_data at once, so
|
||
a single free() will free them both. */
|
||
rawptr = (struct trad_core_struct *)
|
||
bfd_zalloc (abfd, sizeof (struct trad_core_struct));
|
||
if (rawptr == NULL) {
|
||
bfd_error = no_memory;
|
||
return 0;
|
||
}
|
||
|
||
abfd->tdata.trad_core_data = rawptr;
|
||
|
||
rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
|
||
|
||
/* Create the sections. This is raunchy, but bfd_close wants to free
|
||
them separately. */
|
||
|
||
core_stacksec(abfd) = (asection *) zalloc (sizeof (asection));
|
||
if (core_stacksec (abfd) == NULL) {
|
||
loser:
|
||
bfd_error = no_memory;
|
||
free ((void *)rawptr);
|
||
return 0;
|
||
}
|
||
core_datasec (abfd) = (asection *) zalloc (sizeof (asection));
|
||
if (core_datasec (abfd) == NULL) {
|
||
loser1:
|
||
free ((void *)core_stacksec (abfd));
|
||
goto loser;
|
||
}
|
||
core_regsec (abfd) = (asection *) zalloc (sizeof (asection));
|
||
if (core_regsec (abfd) == NULL) {
|
||
free ((void *)core_datasec (abfd));
|
||
goto loser1;
|
||
}
|
||
|
||
core_stacksec (abfd)->name = ".stack";
|
||
core_datasec (abfd)->name = ".data";
|
||
core_regsec (abfd)->name = ".reg";
|
||
|
||
core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
|
||
core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
|
||
core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
|
||
|
||
core_datasec (abfd)->_raw_size = NBPG * u.u_dsize;
|
||
core_stacksec (abfd)->_raw_size = NBPG * u.u_ssize;
|
||
core_regsec (abfd)->_raw_size = NBPG * UPAGES; /* Larger than sizeof struct u */
|
||
|
||
/* What a hack... we'd like to steal it from the exec file,
|
||
since the upage does not seem to provide it. FIXME. */
|
||
#ifdef HOST_DATA_START_ADDR
|
||
core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
|
||
#else
|
||
core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
|
||
#endif
|
||
|
||
#ifdef HOST_STACK_START_ADDR
|
||
core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
|
||
#else
|
||
core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
|
||
#endif
|
||
|
||
/* This is tricky. As the "register section", we give them the entire
|
||
upage and stack. u.u_ar0 points to where "register 0" is stored.
|
||
There are two tricks with this, though. One is that the rest of the
|
||
registers might be at positive or negative (or both) displacements
|
||
from *u_ar0. The other is that u_ar0 is sometimes an absolute address
|
||
in kernel memory, and on other systems it is an offset from the beginning
|
||
of the `struct user'.
|
||
|
||
As a practical matter, we don't know where the registers actually are,
|
||
so we have to pass the whole area to GDB. We encode the value of u_ar0
|
||
by setting the .regs section up so that its virtual memory address
|
||
0 is at the place pointed to by u_ar0 (by setting the vma of the start
|
||
of the section to -u_ar0). GDB uses this info to locate the regs,
|
||
using minor trickery to get around the offset-or-absolute-addr problem. */
|
||
#ifdef TRAD_CORE_REGPOS
|
||
core_regsec (abfd)->vma = TRAD_CORE_REGPOS(abfd);
|
||
#else
|
||
core_regsec (abfd)->vma = 0 - (int) u.u_ar0;
|
||
#endif
|
||
|
||
core_datasec (abfd)->filepos = NBPG * UPAGES;
|
||
#ifdef TRAD_CORE_STACK_FILEPOS
|
||
core_stacksec (abfd)->filepos = TRAD_CORE_STACK_FILEPOS;
|
||
#else
|
||
core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize;
|
||
#endif
|
||
core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
|
||
|
||
/* Align to word at least */
|
||
core_stacksec (abfd)->alignment_power = 2;
|
||
core_datasec (abfd)->alignment_power = 2;
|
||
core_regsec (abfd)->alignment_power = 2;
|
||
|
||
abfd->sections = core_stacksec (abfd);
|
||
core_stacksec (abfd)->next = core_datasec (abfd);
|
||
core_datasec (abfd)->next = core_regsec (abfd);
|
||
abfd->section_count = 3;
|
||
|
||
return abfd->xvec;
|
||
}
|
||
|
||
char *
|
||
trad_unix_core_file_failing_command (abfd)
|
||
bfd *abfd;
|
||
{
|
||
#ifndef NO_CORE_COMMAND
|
||
char *com = abfd->tdata.trad_core_data->u.u_comm;
|
||
if (*com)
|
||
return com;
|
||
else
|
||
#endif
|
||
return 0;
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
trad_unix_core_file_failing_signal (ignore_abfd)
|
||
bfd *ignore_abfd;
|
||
{
|
||
#ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
|
||
return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
|
||
#else
|
||
return -1; /* FIXME, where is it? */
|
||
#endif
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
boolean
|
||
trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
|
||
bfd *core_bfd, *exec_bfd;
|
||
{
|
||
return true; /* FIXME, We have no way of telling at this point */
|
||
}
|
||
|
||
/* No archive file support via this BFD */
|
||
#define trad_unix_openr_next_archived_file bfd_generic_openr_next_archived_file
|
||
#define trad_unix_generic_stat_arch_elt bfd_generic_stat_arch_elt
|
||
#define trad_unix_slurp_armap bfd_false
|
||
#define trad_unix_slurp_extended_name_table bfd_true
|
||
#define trad_unix_write_armap (boolean (*) PARAMS \
|
||
((bfd *arch, unsigned int elength, struct orl *map, \
|
||
unsigned int orl_count, int stridx))) bfd_false
|
||
#define trad_unix_truncate_arname bfd_dont_truncate_arname
|
||
#define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
|
||
|
||
#define trad_unix_close_and_cleanup bfd_generic_close_and_cleanup
|
||
#define trad_unix_set_section_contents (boolean (*) PARAMS \
|
||
((bfd *abfd, asection *section, PTR data, file_ptr offset, \
|
||
bfd_size_type count))) bfd_false
|
||
#define trad_unix_get_section_contents bfd_generic_get_section_contents
|
||
#define trad_unix_new_section_hook (boolean (*) PARAMS \
|
||
((bfd *, sec_ptr))) bfd_true
|
||
#define trad_unix_get_symtab_upper_bound bfd_0u
|
||
#define trad_unix_get_symtab (unsigned int (*) PARAMS \
|
||
((bfd *, struct symbol_cache_entry **))) bfd_0u
|
||
#define trad_unix_get_reloc_upper_bound (unsigned int (*) PARAMS \
|
||
((bfd *, sec_ptr))) bfd_0u
|
||
#define trad_unix_canonicalize_reloc (unsigned int (*) PARAMS \
|
||
((bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
|
||
#define trad_unix_make_empty_symbol (struct symbol_cache_entry * \
|
||
(*) PARAMS ((bfd *))) bfd_false
|
||
#define trad_unix_print_symbol (void (*) PARAMS \
|
||
((bfd *, PTR, struct symbol_cache_entry *, \
|
||
bfd_print_symbol_type))) bfd_false
|
||
#define trad_unix_get_symbol_info (void (*) PARAMS \
|
||
((bfd *, struct symbol_cache_entry *, \
|
||
symbol_info *))) bfd_false
|
||
#define trad_unix_get_lineno (alent * (*) PARAMS \
|
||
((bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
|
||
#define trad_unix_set_arch_mach (boolean (*) PARAMS \
|
||
((bfd *, enum bfd_architecture, unsigned long))) bfd_false
|
||
#define trad_unix_find_nearest_line (boolean (*) PARAMS \
|
||
((bfd *abfd, struct sec *section, \
|
||
struct symbol_cache_entry **symbols,bfd_vma offset, \
|
||
CONST char **file, CONST char **func, unsigned int *line))) bfd_false
|
||
#define trad_unix_sizeof_headers (int (*) PARAMS \
|
||
((bfd *, boolean))) bfd_0
|
||
|
||
#define trad_unix_bfd_debug_info_start bfd_void
|
||
#define trad_unix_bfd_debug_info_end bfd_void
|
||
#define trad_unix_bfd_debug_info_accumulate (void (*) PARAMS \
|
||
((bfd *, struct sec *))) bfd_void
|
||
#define trad_unix_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
|
||
#define trad_unix_bfd_relax_section bfd_generic_relax_section
|
||
#define trad_unix_bfd_seclet_link \
|
||
((boolean (*) PARAMS ((bfd *, PTR, boolean))) bfd_false)
|
||
#define trad_unix_bfd_reloc_type_lookup \
|
||
((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
|
||
#define trad_unix_bfd_make_debug_symbol \
|
||
((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
|
||
|
||
/* If somebody calls any byte-swapping routines, shoot them. */
|
||
void
|
||
swap_abort()
|
||
{
|
||
abort(); /* This way doesn't require any declaration for ANSI to fuck up */
|
||
}
|
||
#define NO_GET ((bfd_vma (*) PARAMS (( bfd_byte *))) swap_abort )
|
||
#define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
|
||
#define NO_SIGNED_GET ((bfd_signed_vma (*) PARAMS ((bfd_byte *))) swap_abort )
|
||
|
||
bfd_target trad_core_vec =
|
||
{
|
||
"trad-core",
|
||
bfd_target_unknown_flavour,
|
||
true, /* target byte order */
|
||
true, /* target headers byte order */
|
||
(HAS_RELOC | EXEC_P | /* object flags */
|
||
HAS_LINENO | HAS_DEBUG |
|
||
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
|
||
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
|
||
0, /* symbol prefix */
|
||
' ', /* ar_pad_char */
|
||
16, /* ar_max_namelen */
|
||
3, /* minimum alignment power */
|
||
NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
|
||
NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
|
||
NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
|
||
NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
|
||
NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
|
||
NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
|
||
|
||
{ /* bfd_check_format */
|
||
_bfd_dummy_target, /* unknown format */
|
||
_bfd_dummy_target, /* object file */
|
||
_bfd_dummy_target, /* archive */
|
||
trad_unix_core_file_p /* a core file */
|
||
},
|
||
{ /* bfd_set_format */
|
||
bfd_false, bfd_false,
|
||
bfd_false, bfd_false
|
||
},
|
||
{ /* bfd_write_contents */
|
||
bfd_false, bfd_false,
|
||
bfd_false, bfd_false
|
||
},
|
||
|
||
JUMP_TABLE(trad_unix),
|
||
(PTR) 0 /* backend_data */
|
||
};
|