bfd/coff-h8500.c

   1 /* BFD back-end for Hitachi H8/500 COFF binaries.
   2    Copyright 1993, 1994, 1995, 1997, 1999, 2000
   3    Free Software Foundation, Inc.
   4    Contributed by Cygnus Support.
   5    Written by Steve Chamberlain, <sac@cygnus.com>.
   6
   7 This file is part of BFD, the Binary File Descriptor library.
   8
   9 This program is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2 of the License, or
  12 (at your option) any later version.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with this program; if not, write to the Free Software
  21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libbfd.h"
  26 #include "bfdlink.h"
  27 #include "coff/h8500.h"
  28 #include "coff/internal.h"
  29 #include "libcoff.h"
  30
  31 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
  32
  33 static reloc_howto_type r_imm8 =
  34 HOWTO (R_H8500_IMM8, 0, 1, 8, false, 0,
  35        complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff, false);
  36
  37 static reloc_howto_type r_imm16 =
  38 HOWTO (R_H8500_IMM16, 0, 1, 16, false, 0,
  39        complain_overflow_bitfield, 0, "r_imm16", true, 0x0000ffff, 0x0000ffff, false);
  40
  41 static reloc_howto_type r_imm24 =
  42 HOWTO (R_H8500_IMM24, 0, 1, 24, false, 0,
  43        complain_overflow_bitfield, 0, "r_imm24", true, 0x00ffffff, 0x00ffffff, false);
  44
  45 static reloc_howto_type r_imm32 =
  46 HOWTO (R_H8500_IMM32, 0, 1, 32, false, 0,
  47        complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff, 0xffffffff, false);
  48
  49 static reloc_howto_type r_high8 =
  50 HOWTO (R_H8500_HIGH8, 0, 1, 8, false, 0,
  51        complain_overflow_dont, 0, "r_high8", true, 0x000000ff, 0x000000ff, false);
  52
  53 static reloc_howto_type r_low16 =
  54 HOWTO (R_H8500_LOW16, 0, 1, 16, false, 0,
  55        complain_overflow_dont, 0, "r_low16", true, 0x0000ffff, 0x0000ffff, false);
  56
  57 static reloc_howto_type r_pcrel8 =
  58 HOWTO (R_H8500_PCREL8, 0, 1, 8, true, 0, complain_overflow_signed, 0, "r_pcrel8", true, 0, 0, true);
  59
  60 static reloc_howto_type r_pcrel16 =
  61 HOWTO (R_H8500_PCREL16, 0, 1, 16, true, 0, complain_overflow_signed, 0, "r_pcrel16", true, 0, 0, true);
  62
  63 static reloc_howto_type r_high16 =
  64 HOWTO (R_H8500_HIGH16, 0, 1, 8, false, 0,
  65        complain_overflow_dont, 0, "r_high16", true, 0x000ffff, 0x0000ffff, false);
  66
  67 /* Turn a howto into a reloc number */
  68
  69 static int
  70 coff_h8500_select_reloc (howto)
  71      reloc_howto_type *howto;
  72 {
  73   return howto->type;
  74 }
  75
  76 #define SELECT_RELOC(x,howto) x.r_type = coff_h8500_select_reloc(howto)
  77
  78 #define BADMAG(x) H8500BADMAG(x)
  79 #define H8500 1                 /* Customize coffcode.h */
  80
  81 #define __A_MAGIC_SET__
  82
  83 /* Code to swap in the reloc */
  84 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  85 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  86 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  87   dst->r_stuff[0] = 'S'; \
  88   dst->r_stuff[1] = 'C';
  89
  90 /* Code to turn a r_type into a howto ptr, uses the above howto table
  91    */
  92
  93 static void
  94 rtype2howto(internal, dst)
  95      arelent * internal;
  96      struct internal_reloc *dst;
  97 {
  98   switch (dst->r_type)
  99     {
 100     default:
 101       abort ();
 102       break;
 103     case R_H8500_IMM8:
 104       internal->howto = &r_imm8;
 105       break;
 106     case R_H8500_IMM16:
 107       internal->howto = &r_imm16;
 108       break;
 109     case R_H8500_IMM24:
 110       internal->howto = &r_imm24;
 111       break;
 112     case R_H8500_IMM32:
 113       internal->howto = &r_imm32;
 114       break;
 115     case R_H8500_PCREL8:
 116       internal->howto = &r_pcrel8;
 117       break;
 118     case R_H8500_PCREL16:
 119       internal->howto = &r_pcrel16;
 120       break;
 121     case R_H8500_HIGH8:
 122       internal->howto = &r_high8;
 123       break;
 124     case R_H8500_HIGH16:
 125       internal->howto = &r_high16;
 126       break;
 127     case R_H8500_LOW16:
 128       internal->howto = &r_low16;
 129       break;
 130     }
 131 }
 132
 133 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 134
 135 /* Perform any necessary magic to the addend in a reloc entry */
 136
 137 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 138  cache_ptr->addend =  ext_reloc.r_offset;
 139
 140 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 141  reloc_processing(relent, reloc, symbols, abfd, section)
 142
 143 static void reloc_processing (relent, reloc, symbols, abfd, section)
 144      arelent * relent;
 145      struct internal_reloc *reloc;
 146      asymbol ** symbols;
 147      bfd * abfd;
 148      asection * section;
 149 {
 150   relent->address = reloc->r_vaddr;
 151   rtype2howto (relent, reloc);
 152
 153   if (reloc->r_symndx > 0)
 154     {
 155       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 156     }
 157   else
 158     {
 159       relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 160     }
 161
 162   relent->addend = reloc->r_offset;
 163   relent->address -= section->vma;
 164 }
 165
 166 static void
 167 extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
 168      bfd *in_abfd;
 169      struct bfd_link_info *link_info;
 170      struct bfd_link_order *link_order;
 171      arelent *reloc;
 172      bfd_byte *data;
 173      unsigned int *src_ptr;
 174      unsigned int *dst_ptr;
 175 {
 176   bfd_byte *d = data+*dst_ptr;
 177   asection *input_section = link_order->u.indirect.section;
 178   switch (reloc->howto->type)
 179     {
 180     case R_H8500_IMM8:
 181       bfd_put_8 (in_abfd,
 182                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 183                  d);
 184       (*dst_ptr) += 1;
 185       (*src_ptr) += 1;
 186       break;
 187
 188     case R_H8500_HIGH8:
 189       bfd_put_8 (in_abfd,
 190                  (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 191                   >> 16),
 192                  d );
 193       (*dst_ptr) += 1;
 194       (*src_ptr) += 1;
 195       break;
 196
 197     case R_H8500_IMM16:
 198       bfd_put_16 (in_abfd,
 199                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 200                   d  );
 201       (*dst_ptr) += 2;
 202       (*src_ptr) += 2;
 203       break;
 204
 205     case R_H8500_LOW16:
 206       bfd_put_16 (in_abfd,
 207                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 208                   d);
 209
 210       (*dst_ptr) += 2;
 211       (*src_ptr) += 2;
 212       break;
 213
 214     case R_H8500_HIGH16:
 215       bfd_put_16 (in_abfd,
 216                   (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 217                    >>16),
 218                   d);
 219
 220       (*dst_ptr) += 2;
 221       (*src_ptr) += 2;
 222       break;
 223
 224     case R_H8500_IMM24:
 225       {
 226         int v = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
 227         int o = bfd_get_32 (in_abfd, data+ *dst_ptr -1);
 228         v = (v & 0x00ffffff) | (o & 0xff00000);
 229         bfd_put_32 (in_abfd, v, data  + *dst_ptr -1);
 230         (*dst_ptr) +=3;
 231         (*src_ptr)+=3;;
 232       }
 233       break;
 234     case R_H8500_IMM32:
 235       {
 236         int v = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
 237         bfd_put_32 (in_abfd, v, data  + *dst_ptr);
 238         (*dst_ptr) +=4;
 239         (*src_ptr)+=4;;
 240       }
 241       break;
 242
 243     case R_H8500_PCREL8:
 244       {
 245         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 246                                                   input_section);
 247         bfd_vma dot = link_order->offset
 248           + *dst_ptr
 249             + link_order->u.indirect.section->output_section->vma;
 250         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 251                                     word and the pc's been incremented */
 252
 253         if (gap > 128 || gap < -128)
 254           {
 255             if (! ((*link_info->callbacks->reloc_overflow)
 256                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 257                     reloc->howto->name, reloc->addend, input_section->owner,
 258                     input_section, reloc->address)))
 259               abort ();
 260           }
 261         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 262         (*dst_ptr)++;
 263         (*src_ptr)++;
 264         break;
 265       }
 266     case R_H8500_PCREL16:
 267       {
 268         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 269                                                   input_section);
 270         bfd_vma dot = link_order->offset
 271           + *dst_ptr
 272             + link_order->u.indirect.section->output_section->vma;
 273         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 274                                     word and the pc's been incremented */
 275
 276         if (gap > 32767 || gap < -32768)
 277           {
 278             if (! ((*link_info->callbacks->reloc_overflow)
 279                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 280                     reloc->howto->name, reloc->addend, input_section->owner,
 281                     input_section, reloc->address)))
 282               abort ();
 283           }
 284         bfd_put_16 (in_abfd, gap, data + *dst_ptr);
 285         (*dst_ptr)+=2;
 286         (*src_ptr)+=2;
 287         break;
 288       }
 289
 290     default:
 291       abort ();
 292     }
 293 }
 294
 295 #define coff_reloc16_extra_cases extra_case
 296
 297 #include "coffcode.h"
 298
 299 #undef  coff_bfd_get_relocated_section_contents
 300 #undef coff_bfd_relax_section
 301 #define coff_bfd_get_relocated_section_contents \
 302   bfd_coff_reloc16_get_relocated_section_contents
 303 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 304
 305 CREATE_BIG_COFF_TARGET_VEC (h8500coff_vec, "coff-h8500", 0, 0, '_', NULL)