329 lines
11 KiB
C
329 lines
11 KiB
C
/* BFD back-end for a.out files encapsulated with COFF headers.
|
||
Copyright (C) 1990-1991 Free Software Foundation, Inc.
|
||
|
||
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. */
|
||
|
||
/* THIS MODULE IS NOT FINISHED. IT PROBABLY DOESN'T EVEN COMPILE. */
|
||
|
||
#if 0
|
||
#define PAGE_SIZE 4096
|
||
#define SEGMENT_SIZE PAGE_SIZE
|
||
#define TEXT_START_ADDR 0
|
||
#define ARCH 32
|
||
#define BYTES_IN_WORD 4
|
||
#endif
|
||
|
||
#include "bfd.h"
|
||
#include <sysdep.h>
|
||
#include "libbfd.h"
|
||
#include "aout64.h"
|
||
|
||
/**From: bothner@cs.wisc.edu***********************************************/
|
||
#undef N_TXTOFF
|
||
#define N_TXTOFF(x) ( (N_MAGIC((x)) == ZMAGIC) ? PAGE_SIZE : EXEC_BYTES_SIZE)
|
||
/**************************************************************************/
|
||
|
||
#include "stab.gnu.h"
|
||
#include "ar.h"
|
||
#include "libaout.h" /* BFD a.out internal data structures */
|
||
|
||
bfd_target *encap_callback ();
|
||
|
||
bfd_target *
|
||
DEFUN(encap_object_p,(abfd),
|
||
bfd *abfd)
|
||
{
|
||
unsigned char magicbuf[4]; /* Raw bytes of magic number from file */
|
||
unsigned long magic; /* Swapped magic number */
|
||
short coff_magic;
|
||
struct external_exec exec_bytes;
|
||
struct internal_exec exec;
|
||
|
||
bfd_error = system_call_error;
|
||
|
||
if (bfd_read ((PTR)magicbuf, 1, sizeof (magicbuf), abfd) !=
|
||
sizeof (magicbuf))
|
||
return 0;
|
||
|
||
coff_magic = bfd_h_get_16 (abfd, magicbuf);
|
||
if (coff_magic != COFF_MAGIC)
|
||
return 0; /* Not an encap coff file */
|
||
|
||
__header_offset_temp==COFF_MAGIC ? sizeof(struct coffheader) : 0)
|
||
(fseek ((f), HEADER_OFFSET((f)), 1))
|
||
|
||
magic = bfd_h_get_32 (abfd, magicbuf);
|
||
|
||
if (N_BADMAG (*((struct internal_exec *) &magic))) return 0;
|
||
|
||
struct external_exec exec_bytes;
|
||
if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
|
||
!= EXEC_BYTES_SIZE) {
|
||
bfd_error = wrong_format;
|
||
return 0;
|
||
}
|
||
NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
|
||
|
||
return aout_32_some_aout_object_p (abfd, &exec, encap_callback);
|
||
}
|
||
|
||
/* Finish up the reading of a encapsulated-coff a.out file header */
|
||
bfd_target *
|
||
DEFUN(encap_callback,(abfd),
|
||
bfd *abfd)
|
||
{
|
||
struct internal_exec *execp = exec_hdr (abfd);
|
||
|
||
WORK_OUT_FILE_POSITIONS(abfd, execp) ;
|
||
|
||
/* If we have a coff header, it can give us better values for
|
||
text_start and exec_data_start. This is particularly useful
|
||
for remote debugging of embedded systems. */
|
||
if (N_FLAGS(exec_aouthdr) & N_FLAGS_COFF_ENCAPSULATE)
|
||
{
|
||
struct coffheader ch;
|
||
int val;
|
||
val = lseek (execchan, -(sizeof (AOUTHDR) + sizeof (ch)), 1);
|
||
if (val == -1)
|
||
perror_with_name (filename);
|
||
val = myread (execchan, &ch, sizeof (ch));
|
||
if (val < 0)
|
||
perror_with_name (filename);
|
||
text_start = ch.text_start;
|
||
exec_data_start = ch.data_start;
|
||
} else
|
||
{
|
||
text_start =
|
||
IS_OBJECT_FILE (exec_aouthdr) ? 0 : N_TXTADDR (exec_aouthdr);
|
||
exec_data_start = IS_OBJECT_FILE (exec_aouthdr)
|
||
? exec_aouthdr.a_text : N_DATADDR (exec_aouthdr);
|
||
}
|
||
|
||
/* Determine the architecture and machine type of the object file. */
|
||
bfd_default_set_arch_mach(abfd, bfd_arch_m68k, 0); /* FIXME */
|
||
|
||
return abfd->xvec;
|
||
}
|
||
|
||
/* Write an object file in Encapsulated COFF format.
|
||
Section contents have already been written. We write the
|
||
file header, symbols, and relocation. */
|
||
|
||
boolean
|
||
DEFUN(encap_write_object_contents,(abfd),
|
||
bfd *abfd)
|
||
{
|
||
bfd_size_type data_pad = 0;
|
||
struct external_exec exec_bytes;
|
||
struct internal_exec *execp = exec_hdr (abfd);
|
||
|
||
/****** FIXME: Fragments from the old GNU LD program for dealing with
|
||
encap coff. */
|
||
struct coffheader coffheader;
|
||
int need_coff_header;
|
||
|
||
/* Determine whether to count the header as part of
|
||
the text size, and initialize the text size accordingly.
|
||
This depends on the kind of system and on the output format selected. */
|
||
|
||
N_SET_MAGIC (outheader, magic);
|
||
#ifdef INITIALIZE_HEADER
|
||
INITIALIZE_HEADER;
|
||
#endif
|
||
|
||
text_size = sizeof (struct exec);
|
||
#ifdef COFF_ENCAPSULATE
|
||
if (relocatable_output == 0 && file_table[0].just_syms_flag == 0)
|
||
{
|
||
need_coff_header = 1;
|
||
/* set this flag now, since it will change the values of N_TXTOFF, etc */
|
||
N_SET_FLAGS (outheader, N_FLAGS_COFF_ENCAPSULATE);
|
||
text_size += sizeof (struct coffheader);
|
||
}
|
||
#endif
|
||
|
||
#ifdef COFF_ENCAPSULATE
|
||
if (need_coff_header)
|
||
{
|
||
/* We are encapsulating BSD format within COFF format. */
|
||
struct coffscn *tp, *dp, *bp;
|
||
|
||
tp = &coffheader.scns[0];
|
||
dp = &coffheader.scns[1];
|
||
bp = &coffheader.scns[2];
|
||
|
||
strcpy (tp->s_name, ".text");
|
||
tp->s_paddr = text_start;
|
||
tp->s_vaddr = text_start;
|
||
tp->s_size = text_size;
|
||
tp->s_scnptr = sizeof (struct coffheader) + sizeof (struct exec);
|
||
tp->s_relptr = 0;
|
||
tp->s_lnnoptr = 0;
|
||
tp->s_nreloc = 0;
|
||
tp->s_nlnno = 0;
|
||
tp->s_flags = 0x20;
|
||
strcpy (dp->s_name, ".data");
|
||
dp->s_paddr = data_start;
|
||
dp->s_vaddr = data_start;
|
||
dp->s_size = data_size;
|
||
dp->s_scnptr = tp->s_scnptr + tp->s_size;
|
||
dp->s_relptr = 0;
|
||
dp->s_lnnoptr = 0;
|
||
dp->s_nreloc = 0;
|
||
dp->s_nlnno = 0;
|
||
dp->s_flags = 0x40;
|
||
strcpy (bp->s_name, ".bss");
|
||
bp->s_paddr = dp->s_vaddr + dp->s_size;
|
||
bp->s_vaddr = bp->s_paddr;
|
||
bp->s_size = bss_size;
|
||
bp->s_scnptr = 0;
|
||
bp->s_relptr = 0;
|
||
bp->s_lnnoptr = 0;
|
||
bp->s_nreloc = 0;
|
||
bp->s_nlnno = 0;
|
||
bp->s_flags = 0x80;
|
||
|
||
coffheader.f_magic = COFF_MAGIC;
|
||
coffheader.f_nscns = 3;
|
||
/* store an unlikely time so programs can
|
||
* tell that there is a bsd header
|
||
*/
|
||
coffheader.f_timdat = 1;
|
||
coffheader.f_symptr = 0;
|
||
coffheader.f_nsyms = 0;
|
||
coffheader.f_opthdr = 28;
|
||
coffheader.f_flags = 0x103;
|
||
/* aouthdr */
|
||
coffheader.magic = ZMAGIC;
|
||
coffheader.vstamp = 0;
|
||
coffheader.tsize = tp->s_size;
|
||
coffheader.dsize = dp->s_size;
|
||
coffheader.bsize = bp->s_size;
|
||
coffheader.entry = outheader.a_entry;
|
||
coffheader.text_start = tp->s_vaddr;
|
||
coffheader.data_start = dp->s_vaddr;
|
||
}
|
||
#endif
|
||
|
||
#ifdef COFF_ENCAPSULATE
|
||
if (need_coff_header)
|
||
mywrite (&coffheader, sizeof coffheader, 1, outdesc);
|
||
#endif
|
||
|
||
#ifndef COFF_ENCAPSULATE
|
||
padfile (N_TXTOFF (outheader) - sizeof outheader, outdesc);
|
||
#endif
|
||
|
||
text_size -= N_TXTOFF (outheader);
|
||
WRITE_HEADERS(abfd, execp);
|
||
return true;
|
||
}
|
||
|
||
/* Transfer vectors for Encapsulated-(aout-in)-coff */
|
||
|
||
/* We use BFD generic archive files. */
|
||
#define newsos_openr_next_archived_file bfd_generic_openr_next_archived_file
|
||
#define newsos_generic_stat_arch_elt bfd_generic_stat_arch_elt
|
||
#define newsos_slurp_armap bfd_slurp_bsd_armap
|
||
#define newsos_slurp_extended_name_table bfd_true
|
||
#define newsos_write_armap bsd_write_armap
|
||
#define newsos_truncate_arname bfd_bsd_truncate_arname
|
||
|
||
/* We don't support core files yet. FIXME. */
|
||
#define newsos_core_file_failing_command _bfd_dummy_core_file_failing_command
|
||
#define newsos_core_file_failing_signal _bfd_dummy_core_file_failing_signal
|
||
#define newsos_core_file_matches_executable_p \
|
||
_bfd_dummy_core_file_matches_executable_p
|
||
#define newsos_core_file_p _bfd_dummy_target
|
||
|
||
#define newsos_bfd_debug_info_start bfd_void
|
||
#define newsos_bfd_debug_info_end bfd_void
|
||
#define newsos_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
|
||
|
||
#define newsos_mkobject aout_32_mkobject
|
||
#define newsos_close_and_cleanup aout_32_close_and_cleanup
|
||
#define newsos_set_section_contents aout_32_set_section_contents
|
||
#define newsos_get_section_contents aout_32_get_section_contents
|
||
#define newsos_new_section_hook aout_32_new_section_hook
|
||
#define newsos_get_symtab_upper_bound aout_32_get_symtab_upper_bound
|
||
#define newsos_get_symtab aout_32_get_symtab
|
||
#define newsos_get_reloc_upper_bound aout_32_get_reloc_upper_bound
|
||
#define newsos_canonicalize_reloc aout_32_canonicalize_reloc
|
||
#define newsos_make_empty_symbol aout_32_make_empty_symbol
|
||
#define newsos_print_symbol aout_32_print_symbol
|
||
#define newsos_get_lineno aout_32_get_lineno
|
||
#define newsos_set_arch_mach aout_32_set_arch_mach
|
||
#define newsos_find_nearest_line aout_32_find_nearest_line
|
||
#define newsos_sizeof_headers aout_32_sizeof_headers
|
||
|
||
|
||
/* We define our own versions of these routines. */
|
||
|
||
|
||
bfd_target encap_big_vec = /* "Encapsulated coff": a.out with COFF header prefix */
|
||
{
|
||
"a.out-encap", /* name */
|
||
bfd_target_aout_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 */
|
||
' ', /* ar_pad_char */
|
||
16, /* ar_max_namelen */
|
||
1, /* minimum alignment */
|
||
_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
|
||
_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
|
||
|
||
{_bfd_dummy_target, newsos3_object_p, /* bfd_check_format */
|
||
bfd_generic_archive_p, newsos_core_file_p},
|
||
{bfd_false, newsos_mkobject, /* bfd_set_format */
|
||
_bfd_generic_mkarchive, bfd_false},
|
||
{bfd_false, newsos3_write_object_contents, /* bfd_write_contents */
|
||
_bfd_write_archive_contents, bfd_false},
|
||
|
||
JUMP_TABLE(newsos)
|
||
};
|
||
|
||
/* Little-endian "encapsulated coff": a.out with COFF header prefix */
|
||
bfd_target encap_little_vec =
|
||
{
|
||
"a.out-encap-little", /* name */
|
||
bfd_target_aout_flavour,
|
||
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 */
|
||
1, /* minimum alignment */
|
||
_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
|
||
_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putb16, /* hdrs */
|
||
|
||
{_bfd_dummy_target, newsos3_object_p, /* bfd_check_format */
|
||
bfd_generic_archive_p, newsos_core_file_p},
|
||
{bfd_false, newsos_mkobject, /* bfd_set_format */
|
||
_bfd_generic_mkarchive, bfd_false},
|
||
{bfd_false, newsos3_write_object_contents, /* bfd_write_contents */
|
||
_bfd_write_archive_contents, bfd_false},
|
||
|
||
JUMP_TABLE(newsos)
|
||
};
|