bfd/coff-z8k.c

   1 /* Zilog Z800n COFF back-end for BFD.
   2    Copyright (C) 1992 Free Software Foundation, Inc.
   3    Written by Steve Chamberlain
   4    sac@cygnus.com
   5
   6 This file is part of BFD, the Binary File Descriptor library.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libbfd.h"
  26 #include "obstack.h"
  27 #include "coff/z8k.h"
  28 #include "coff/internal.h"
  29 #include "libcoff.h"
  30 #include "seclet.h"
  31
  32 extern bfd_error_vector_type bfd_error_vector;
  33
  34 /* Dummy for now */
  35 static bfd_reloc_status_type
  36 DEFUN(func_da, (abfd, reloc_entry, symbol, data, input_section, output_bfd),
  37     bfd *abfd AND
  38     arelent *reloc_entry AND
  39     struct symbol_cache_entry *symbol AND
  40     PTR data AND
  41     asection *input_section AND
  42     bfd *output_bfd)
  43 {
  44 }
  45
  46 /* Dummy for now */
  47 static bfd_reloc_status_type
  48 DEFUN(func_jr, (abfd, reloc_entry, symbol, data, input_section, output_bfd),
  49     bfd *abfd AND
  50     arelent *reloc_entry AND
  51     struct symbol_cache_entry *symbol AND
  52     PTR data AND
  53     asection *input_section AND
  54     bfd *output_bfd)
  55 {
  56 }
  57
  58 static reloc_howto_type r_da =
  59   HOWTO(R_DA , 0,  1,   16, false, 0, true,
  60 true,func_da,"r_da",    true, 0x0000ffff,0x0000ffff, false);
  61
  62 static reloc_howto_type r_jr =
  63  HOWTO(R_JR, 0,1,8,true,0,true,true,func_jr,"r_jr", true,0,0,true);
  64
  65
  66
  67
  68
  69 /* Turn a howto into a reloc number */
  70
  71 static int coff_z8k_select_reloc(howto)
  72 reloc_howto_type *howto;
  73 {
  74 return howto->type;
  75 }
  76 #define SELECT_RELOC(x,howto) x= coff_z8k_select_reloc(howto)
  77
  78
  79 #define BADMAG(x) Z8KBADMAG(x)
  80 #define Z8K 1           /* Customize coffcode.h */
  81 #define __A_MAGIC_SET__
  82
  83
  84
  85 /* Code to swap in the reloc */
  86 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  87 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  88 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  89   dst->r_stuff[0] = 'S'; \
  90   dst->r_stuff[1] = 'C';
  91
  92 /* Code to turn a r_type into a howto ptr, uses the above howto table
  93    */
  94
  95 static void
  96 DEFUN(rtype2howto,(internal, dst),
  97 arelent *internal AND
  98 struct internal_reloc *dst)
  99 {
 100   switch (dst->r_type) {
 101    default:
 102     printf("BAD %x\n", dst->r_type);
 103    case R_DA:
 104     internal->howto = &r_da;
 105     break;
 106    case R_JR:
 107     internal->howto = &r_jr;
 108     }
 109 }
 110
 111 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 112
 113
 114 /* Perform any necessaru magic to the addend in a reloc entry */
 115
 116
 117 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 118  cache_ptr->addend =  ext_reloc.r_offset;
 119
 120
 121 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 122  reloc_processing(relent, reloc, symbols, abfd, section)
 123
 124 static void DEFUN(reloc_processing,(relent,reloc, symbols, abfd, section) ,
 125            arelent *relent AND
 126            struct internal_reloc *reloc AND
 127            asymbol **symbols AND
 128            bfd *abfd AND
 129            asection *section)
 130 {
 131   relent->address = reloc->r_vaddr;
 132   rtype2howto(relent,reloc);
 133
 134   if (reloc->r_symndx > 0)
 135   {
 136
 137     relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx];
 138
 139   }
 140   else
 141   {
 142     relent->sym_ptr_ptr = &(bfd_abs_symbol);
 143   }
 144
 145
 146
 147   relent->addend = reloc->r_offset;
 148
 149   relent->address-= section->vma;
 150 /*  relent->section = 0;*/
 151 }
 152
 153 static bfd_vma get_value();
 154
 155 static void
 156 extra_case(in_abfd, seclet, reloc, data, src_ptr, dst_ptr)
 157      bfd *in_abfd;
 158      bfd_seclet_type *seclet;
 159      arelent *reloc;
 160      bfd_byte *data;
 161      unsigned int *src_ptr;
 162      unsigned int *dst_ptr;
 163 {
 164   switch (reloc->howto->type)
 165   {
 166    case R_DA:
 167     bfd_put_16(in_abfd, get_value(reloc, seclet), data+*dst_ptr);
 168     (*dst_ptr)+=2;
 169     ( *src_ptr)+=2;
 170     break;
 171    case R_JR:
 172    {
 173      bfd_vma dst = get_value(reloc,seclet);
 174      bfd_vma dot = seclet->offset
 175       + *dst_ptr
 176        + seclet->u.indirect.section->output_section->vma;
 177      int gap = dst - dot - 1 ; /* -1 since were in the odd byte of the
 178                                   word */
 179      if (gap & 1)
 180       abort();
 181      gap/=2;
 182      if (gap > 128 || gap< -128)
 183      {
 184        bfd_error_vector.reloc_value_truncated(reloc, seclet);
 185      }
 186      bfd_put_8(in_abfd, gap, data+*dst_ptr);
 187      (*dst_ptr)++;
 188      (*src_ptr)++;
 189      break;
 190    }
 191    default:
 192     abort();
 193   }
 194 }
 195 #define EXTRA_CASES default: extra_case(in_abfd,seclet,reloc, data, &src_address, &dst_address);
 196
 197
 198
 199
 200 #include "coffcode.h"
 201
 202
 203 #undef  coff_bfd_get_relocated_section_contents
 204 #undef coff_bfd_relax_section
 205 #define  coff_bfd_get_relocated_section_contents bfd_coff_get_relocated_section_contents
 206 #define coff_bfd_relax_section bfd_coff_relax_section
 207
 208 bfd_target z8kcoff_vec =
 209 {
 210   "coff-z8k",                   /* name */
 211   bfd_target_coff_flavour,
 212   true,                         /* data byte order is big */
 213   true,                         /* header byte order is big */
 214
 215   (HAS_RELOC | EXEC_P |         /* object flags */
 216    HAS_LINENO | HAS_DEBUG |
 217    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
 218
 219   ( SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 220   '_',                          /* leading symbol underscore */
 221   '/',                          /* ar_pad_char */
 222   15,                           /* ar_max_namelen */
 223   1,                            /* minimum section alignment */
 224   _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
 225   _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
 226
 227  {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
 228    bfd_generic_archive_p, _bfd_dummy_target},
 229  {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 230    bfd_false},
 231  {bfd_false, coff_write_object_contents, /* bfd_write_contents */
 232    _bfd_write_archive_contents, bfd_false},
 233
 234   JUMP_TABLE(coff),
 235   COFF_SWAP_TABLE
 236  };