coff-m68k.c

早期freebsd实现

/* BFD back-end for Motorola 68000 COFF binaries.
   Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
   Written by 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.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "obstack.h"
#include "coff/m68k.h"
#include "coff/internal.h"
#include "libcoff.h"

 reloc_howto_type m68kcoff_howto_table[] = 
{
  HOWTO(R_RELBYTE,	       0,  0,  	8,  false, 0, true,  true,0,"8",	true, 0x000000ff,0x000000ff, false),
  HOWTO(R_RELWORD,	       0,  1, 	16, false, 0, true,  true,0,"16",	true, 0x0000ffff,0x0000ffff, false),
  HOWTO(R_RELLONG,	       0,  2, 	32, false, 0, true,  true,0,"32",	true, 0xffffffff,0xffffffff, false),
  HOWTO(R_PCRBYTE,	       0,  0, 	8,  true,  0, false, true,0,"DISP8",    true, 0x000000ff,0x000000ff, false),
  HOWTO(R_PCRWORD,	       0,  1, 	16, true,  0, false, true,0,"DISP16",   true, 0x0000ffff,0x0000ffff, false),
  HOWTO(R_PCRLONG,	       0,  2, 	32, true,  0, false, true,0,"DISP32",   true, 0xffffffff,0xffffffff, false),
  HOWTO(R_RELLONG_NEG,	       0,  -2, 	32, false, 0, true,  true,0,"-32",	true, 0xffffffff,0xffffffff, false),
};


/* Turn a howto into a reloc number */


#define BADMAG(x) M68KBADMAG(x)
#define M68 1		/* Customize coffcode.h */

void
m68k_rtype2howto(internal, relocentry)
     arelent *internal;
     int relocentry;
{
  switch (relocentry) 
  {
   case R_RELBYTE:	internal->howto = m68kcoff_howto_table + 0; break;
   case R_RELWORD:	internal->howto = m68kcoff_howto_table + 1; break;
   case R_RELLONG:	internal->howto = m68kcoff_howto_table + 2; break;
   case R_PCRBYTE:	internal->howto = m68kcoff_howto_table + 3; break;
   case R_PCRWORD:	internal->howto = m68kcoff_howto_table + 4; break;
   case R_PCRLONG:	internal->howto = m68kcoff_howto_table + 5; break;
   case R_RELLONG_NEG:	internal->howto = m68kcoff_howto_table + 6; break;
  }
}

#define RTYPE2HOWTO(internal, relocentry) m68k_rtype2howto(internal, (relocentry)->r_type)

#include "coffcode.h"


bfd_target m68kcoff_vec =
{
  "coff-m68k",			/* name */
  bfd_target_coff_flavour,
  true,				/* data byte order is big */
  true,				/* header byte order is big */

  (HAS_RELOC | EXEC_P |		/* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),

  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
  0,				/* leading underscore */
  '/',				/* ar_pad_char */
  15,				/* ar_max_namelen */
  3,				/* minimum section 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, coff_object_p, /* bfd_check_format */
   bfd_generic_archive_p, _bfd_dummy_target},
 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
   bfd_false},
 {bfd_false, coff_write_object_contents, /* bfd_write_contents */
   _bfd_write_archive_contents, bfd_false},

  JUMP_TABLE(coff),
  COFF_SWAP_TABLE
 };