bfd/coff-m68k.c

   1 /* BFD back-end for Motorola 68000 COFF binaries.
   2    Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
   3    Written by Cygnus Support.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "obstack.h"
  25 #include "coff/m68k.h"
  26 #include "coff/internal.h"
  27 #include "libcoff.h"
  28
  29 #ifdef ONLY_DECLARE_RELOCS
  30 extern reloc_howto_type m68kcoff_howto_table[];
  31 #else
  32 reloc_howto_type m68kcoff_howto_table[] =
  33 {
  34   HOWTO(R_RELBYTE,             0,  0,   8,  false, 0, true,  true,0,"8",        true, 0x000000ff,0x000000ff, false),
  35   HOWTO(R_RELWORD,             0,  1,   16, false, 0, true,  true,0,"16",       true, 0x0000ffff,0x0000ffff, false),
  36   HOWTO(R_RELLONG,             0,  2,   32, false, 0, true,  true,0,"32",       true, 0xffffffff,0xffffffff, false),
  37   HOWTO(R_PCRBYTE,             0,  0,   8,  true,  0, false, true,0,"DISP8",    true, 0x000000ff,0x000000ff, false),
  38   HOWTO(R_PCRWORD,             0,  1,   16, true,  0, false, true,0,"DISP16",   true, 0x0000ffff,0x0000ffff, false),
  39   HOWTO(R_PCRLONG,             0,  2,   32, true,  0, false, true,0,"DISP32",   true, 0xffffffff,0xffffffff, false),
  40   HOWTO(R_RELLONG_NEG,         0,  -2,  32, false, 0, true,  true,0,"-32",      true, 0xffffffff,0xffffffff, false),
  41 };
  42 #endif /* not ONLY_DECLARE_RELOCS */
  43
  44 #ifndef BADMAG
  45 #define BADMAG(x) M68KBADMAG(x)
  46 #endif
  47 #define M68 1           /* Customize coffcode.h */
  48
  49 /* Turn a howto into a reloc number */
  50
  51 #ifdef ONLY_DECLARE_RELOCS
  52 extern void m68k_rtype2howto PARAMS ((arelent *internal, int relocentry));
  53 extern int m68k_howto2rtype PARAMS ((CONST struct reloc_howto_struct *));
  54 #else
  55 void
  56 m68k_rtype2howto(internal, relocentry)
  57      arelent *internal;
  58      int relocentry;
  59 {
  60   switch (relocentry)
  61   {
  62    case R_RELBYTE:      internal->howto = m68kcoff_howto_table + 0; break;
  63    case R_RELWORD:      internal->howto = m68kcoff_howto_table + 1; break;
  64    case R_RELLONG:      internal->howto = m68kcoff_howto_table + 2; break;
  65    case R_PCRBYTE:      internal->howto = m68kcoff_howto_table + 3; break;
  66    case R_PCRWORD:      internal->howto = m68kcoff_howto_table + 4; break;
  67    case R_PCRLONG:      internal->howto = m68kcoff_howto_table + 5; break;
  68    case R_RELLONG_NEG:  internal->howto = m68kcoff_howto_table + 6; break;
  69   }
  70 }
  71
  72 int
  73 m68k_howto2rtype (internal)
  74      CONST struct reloc_howto_struct *internal;
  75 {
  76   if (internal->pc_relative)
  77   {
  78     switch (internal->bitsize)
  79     {
  80      case 32: return R_PCRLONG;
  81      case 16: return R_PCRWORD;
  82      case 8: return R_PCRBYTE;
  83     }
  84   }
  85   else
  86   {
  87     switch (internal->bitsize)
  88      {
  89       case 32: return R_RELLONG;
  90       case 16: return R_RELWORD;
  91       case 8: return R_RELBYTE;
  92      }
  93   }
  94   return R_RELLONG;
  95 }
  96 #endif /* not ONLY_DECLARE_RELOCS */
  97
  98 #define RTYPE2HOWTO(internal, relocentry) \
  99   m68k_rtype2howto(internal, (relocentry)->r_type)
 100
 101 #define SELECT_RELOC(external, internal) \
 102   external = m68k_howto2rtype(internal);
 103
 104 #include "coffcode.h"
 105
 106 bfd_target
 107 #ifdef TARGET_SYM
 108   TARGET_SYM =
 109 #else
 110   m68kcoff_vec =
 111 #endif
 112 {
 113 #ifdef TARGET_NAME
 114   TARGET_NAME,
 115 #else
 116   "coff-m68k",                  /* name */
 117 #endif
 118   bfd_target_coff_flavour,
 119   true,                         /* data byte order is big */
 120   true,                         /* header byte order is big */
 121
 122   (HAS_RELOC | EXEC_P |         /* object flags */
 123    HAS_LINENO | HAS_DEBUG |
 124    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
 125
 126   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 127 #ifdef NAMES_HAVE_UNDERSCORE
 128   '_',
 129 #else
 130   0,                            /* leading underscore */
 131 #endif
 132   '/',                          /* ar_pad_char */
 133   15,                           /* ar_max_namelen */
 134   1,                            /* minimum section alignment */
 135   _do_getb64, _do_getb_signed_64, _do_putb64,
 136      _do_getb32, _do_getb_signed_32, _do_putb32,
 137      _do_getb16, _do_getb_signed_16, _do_putb16, /* data */
 138   _do_getb64, _do_getb_signed_64, _do_putb64,
 139      _do_getb32, _do_getb_signed_32, _do_putb32,
 140      _do_getb16, _do_getb_signed_16, _do_putb16, /* hdrs */
 141
 142  {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
 143    bfd_generic_archive_p, _bfd_dummy_target},
 144  {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 145    bfd_false},
 146  {bfd_false, coff_write_object_contents, /* bfd_write_contents */
 147    _bfd_write_archive_contents, bfd_false},
 148
 149   JUMP_TABLE(coff),
 150   COFF_SWAP_TABLE
 151  };