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/* BFD backend for local host's a.out binaries */
/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Diddler.
BFD 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 1, or (at your option)
any later version.
BFD 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 BFD; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include <a.out.h>
#include "liba.out.h" /* BFD a.out internal data structures */
#include "trad-core.h" /* Traditional Unix core files */
void (*bfd_error_trap)();
static bfd_target *host_aout_callback ();
/*SUPPRESS558*/
/*SUPPRESS529*/
bfd_target *
host_aout_object_p (abfd)
bfd *abfd;
{
unsigned char magicbuf[4]; /* Raw bytes of magic number from file */
unsigned long magic; /* Swapped magic number */
bfd_error = system_call_error;
if (bfd_read ((PTR)magicbuf, 1, sizeof (magicbuf), abfd) !=
sizeof (magicbuf))
return 0;
magic = bfd_h_getlong (abfd, magicbuf);
if (N_BADMAG (*((struct exec *) &magic))) return 0;
return some_aout_object_p (abfd, host_aout_callback);
}
/* Set parameters about this a.out file that are machine-dependent.
This routine is called from some_aout_object_p just before it returns. */
static bfd_target *
host_aout_callback (abfd)
bfd *abfd;
{
struct exec *execp = exec_hdr (abfd);
/* The virtual memory addresses of the sections */
obj_datasec (abfd)->vma = N_DATADDR(*execp);
obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
obj_textsec (abfd)->vma = N_TXTADDR(*execp);
/* The file offsets of the sections */
obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
obj_datasec (abfd)->filepos = N_DATOFF(*execp);
/* The file offsets of the relocation info */
obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
/* The file offsets of the string table and symbol table. */
obj_str_filepos (abfd) = N_STROFF (*execp);
obj_sym_filepos (abfd) = N_SYMOFF (*execp);
#ifdef HOST_MACHINE_ARCH
abfd->obj_arch = HOST_MACHINE_ARCH;
#endif
#ifdef HOST_MACHINE_MACHINE
abfd->obj_machine = HOST_MACHINE_MACHINE;
#endif
return abfd->xvec;
}
boolean
host_aout_mkobject (abfd)
bfd *abfd;
{
char *rawptr;
bfd_error = system_call_error;
/* Use an intermediate variable for clarity */
rawptr = bfd_zalloc (abfd, sizeof (struct aoutdata) + sizeof (struct exec));
if (rawptr == NULL) {
bfd_error = no_memory;
return false;
}
set_tdata (abfd, (struct aoutdata *) rawptr);
exec_hdr (abfd) = (struct exec *) (rawptr + sizeof (struct aoutdata));
/* For simplicity's sake we just make all the sections right here. */
obj_textsec (abfd) = (asection *)NULL;
obj_datasec (abfd) = (asection *)NULL;
obj_bsssec (abfd) = (asection *)NULL;
bfd_make_section (abfd, ".text");
bfd_make_section (abfd, ".data");
bfd_make_section (abfd, ".bss");
return true;
}
/* Write an object file in host a.out format.
Section contents have already been written. We write the
file header, symbols, and relocation. */
boolean
host_aout_write_object_contents (abfd)
bfd *abfd;
{
/* This works because we are on the host system */
#define EXEC_BYTES_SIZE sizeof (struct exec)
size_t data_pad = 0;
unsigned char exec_bytes[EXEC_BYTES_SIZE];
struct exec *execp = exec_hdr (abfd);
execp->a_text = obj_textsec (abfd)->size;
N_SET_MAGIC (*execp, OMAGIC);
if (abfd->flags & D_PAGED) {
/* This is not strictly true, but will probably do for the default
case. FIXME.
*/
execp->a_text = obj_textsec (abfd)->size + EXEC_BYTES_SIZE;
N_SET_MAGIC (*execp, ZMAGIC);
} else if (abfd->flags & WP_TEXT) {
N_SET_MAGIC (*execp, NMAGIC);
}
N_SET_FLAGS (*execp, 0x1); /* copied from ld.c; who the hell knows? */
if (abfd->flags & D_PAGED)
{
data_pad = ((obj_datasec(abfd)->size + PAGE_SIZE -1)
& (- PAGE_SIZE)) - obj_datasec(abfd)->size;
if (data_pad > obj_bsssec(abfd)->size)
execp->a_bss = 0;
else
execp->a_bss = obj_bsssec(abfd)->size - data_pad;
execp->a_data = obj_datasec(abfd)->size + data_pad;
}
else {
execp->a_data = obj_datasec (abfd)->size;
execp->a_bss = obj_bsssec (abfd)->size;
}
execp->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
execp->a_entry = bfd_get_start_address (abfd);
execp->a_trsize = ((obj_textsec (abfd)->reloc_count) *
obj_reloc_entry_size (abfd));
execp->a_drsize = ((obj_datasec (abfd)->reloc_count) *
obj_reloc_entry_size (abfd));
bfd_aout_swap_exec_header_out (abfd, execp, exec_bytes);
bfd_seek (abfd, 0L, false);
bfd_write ((PTR) exec_bytes, 1, EXEC_BYTES_SIZE, abfd);
/* Now write out reloc info, followed by syms and strings */
if (bfd_get_symcount (abfd) != 0)
{
bfd_seek (abfd,
(long)(N_SYMOFF(*execp)), false);
aout_write_syms (abfd);
bfd_seek (abfd, (long)(N_TRELOFF(*execp)), false);
if (!aout_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
bfd_seek (abfd, (long)(N_DRELOFF(*execp)), false);
if (!aout_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
}
return true;
}
/* We use BFD generic archive files. */
#define aout_openr_next_archived_file bfd_generic_openr_next_archived_file
#define aout_generic_stat_arch_elt bfd_generic_stat_arch_elt
#define aout_slurp_armap bfd_slurp_bsd_armap
#define aout_slurp_extended_name_table bfd_true
#define aout_write_armap bsd_write_armap
#define aout_truncate_arname bfd_bsd_truncate_arname
/* We use traditional Unix core file format. */
#define aout_core_file_failing_command trad_unix_core_file_failing_command
#define aout_core_file_failing_signal trad_unix_core_file_failing_signal
#define aout_core_file_matches_executable_p \
trad_unix_core_file_matches_executable_p
/* We replace this function */
#define aout_write_object_contents host_aout_write_object_contents
bfd_target host_aout_big_vec =
{
"a.out-host-big", /* name */
bfd_target_aout_flavour_enum,
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 */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
_do_getblong, _do_putblong, _do_getbshort, _do_putbshort, /* data */
_do_getblong, _do_putblong, _do_getbshort, _do_putbshort, /* hdrs */
{_bfd_dummy_target, host_aout_object_p,
bfd_generic_archive_p, trad_unix_core_file_p},
{bfd_false, host_aout_mkobject,
_bfd_generic_mkarchive, bfd_false},
{bfd_false, aout_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
JUMP_TABLE(aout)
};
bfd_target host_aout_little_vec =
{
"a.out-host-little", /* name */
bfd_target_aout_flavour_enum,
false, /* target byte order */
false, /* 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 */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
_do_getllong, _do_putllong, _do_getlshort, _do_putlshort, /* data */
_do_getllong, _do_putllong, _do_getlshort, _do_putlshort, /* hdrs */
{_bfd_dummy_target, host_aout_object_p,
bfd_generic_archive_p, trad_unix_core_file_p},
{bfd_false, host_aout_mkobject,
_bfd_generic_mkarchive, bfd_false},
{bfd_false, aout_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
JUMP_TABLE(aout)
};
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