bfd/coff-h8500.c

   1 /* BFD back-end for Hitachi H8/500 COFF binaries.
   2    Copyright 1993, 94, 95, 1997 Free Software Foundation, Inc.
   3    Contributed by Cygnus Support.
   4    Written by Steve Chamberlain, <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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  21
  22 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "libbfd.h"
  25 #include "bfdlink.h"
  26 #include "coff/h8500.h"
  27 #include "coff/internal.h"
  28 #include "libcoff.h"
  29
  30 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
  31
  32 static reloc_howto_type r_imm8 =
  33 HOWTO (R_H8500_IMM8, 0, 1, 8, false, 0,
  34        complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff, false);
  35
  36 static reloc_howto_type r_imm16 =
  37 HOWTO (R_H8500_IMM16, 0, 1, 16, false, 0,
  38        complain_overflow_bitfield, 0, "r_imm16", true, 0x0000ffff, 0x0000ffff, false);
  39
  40 static reloc_howto_type r_imm24 =
  41 HOWTO (R_H8500_IMM24, 0, 1, 24, false, 0,
  42        complain_overflow_bitfield, 0, "r_imm24", true, 0x00ffffff, 0x00ffffff, false);
  43
  44 static reloc_howto_type r_imm32 =
  45 HOWTO (R_H8500_IMM32, 0, 1, 32, false, 0,
  46        complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff, 0xffffffff, false);
  47
  48 static reloc_howto_type r_high8 =
  49 HOWTO (R_H8500_HIGH8, 0, 1, 8, false, 0,
  50        complain_overflow_dont, 0, "r_high8", true, 0x000000ff, 0x000000ff, false);
  51
  52 static reloc_howto_type r_low16 =
  53 HOWTO (R_H8500_LOW16, 0, 1, 16, false, 0,
  54        complain_overflow_dont, 0, "r_low16", true, 0x0000ffff, 0x0000ffff, false);
  55
  56 static reloc_howto_type r_pcrel8 =
  57 HOWTO (R_H8500_PCREL8, 0, 1, 8, true, 0, complain_overflow_signed, 0, "r_pcrel8", true, 0, 0, true);
  58
  59 static reloc_howto_type r_pcrel16 =
  60 HOWTO (R_H8500_PCREL16, 0, 1, 16, true, 0, complain_overflow_signed, 0, "r_pcrel16", true, 0, 0, true);
  61
  62 static reloc_howto_type r_high16 =
  63 HOWTO (R_H8500_HIGH16, 0, 1, 8, false, 0,
  64        complain_overflow_dont, 0, "r_high16", true, 0x000ffff, 0x0000ffff, false);
  65
  66 /* Turn a howto into a reloc number */
  67
  68 static int
  69 coff_h8500_select_reloc (howto)
  70      reloc_howto_type *howto;
  71 {
  72   return howto->type;
  73 }
  74
  75 #define SELECT_RELOC(x,howto) x.r_type = coff_h8500_select_reloc(howto)
  76
  77 #define BADMAG(x) H8500BADMAG(x)
  78 #define H8500 1                 /* Customize coffcode.h */
  79
  80 #define __A_MAGIC_SET__
  81
  82 /* Code to swap in the reloc */
  83 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  84 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  85 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  86   dst->r_stuff[0] = 'S'; \
  87   dst->r_stuff[1] = 'C';
  88
  89 /* Code to turn a r_type into a howto ptr, uses the above howto table
  90    */
  91
  92 static void
  93 rtype2howto(internal, dst)
  94      arelent * internal;
  95      struct internal_reloc *dst;
  96 {
  97   switch (dst->r_type)
  98     {
  99     default:
 100       abort ();
 101       break;
 102     case R_H8500_IMM8:
 103       internal->howto = &r_imm8;
 104       break;
 105     case R_H8500_IMM16:
 106       internal->howto = &r_imm16;
 107       break;
 108     case R_H8500_IMM24:
 109       internal->howto = &r_imm24;
 110       break;
 111     case R_H8500_IMM32:
 112       internal->howto = &r_imm32;
 113       break;
 114     case R_H8500_PCREL8:
 115       internal->howto = &r_pcrel8;
 116       break;
 117     case R_H8500_PCREL16:
 118       internal->howto = &r_pcrel16;
 119       break;
 120     case R_H8500_HIGH8:
 121       internal->howto = &r_high8;
 122       break;
 123     case R_H8500_HIGH16:
 124       internal->howto = &r_high16;
 125       break;
 126     case R_H8500_LOW16:
 127       internal->howto = &r_low16;
 128       break;
 129     }
 130 }
 131
 132 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 133
 134 /* Perform any necessary magic to the addend in a reloc entry */
 135
 136 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 137  cache_ptr->addend =  ext_reloc.r_offset;
 138
 139 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 140  reloc_processing(relent, reloc, symbols, abfd, section)
 141
 142 static void reloc_processing (relent, reloc, symbols, abfd, section)
 143      arelent * relent;
 144      struct internal_reloc *reloc;
 145      asymbol ** symbols;
 146      bfd * abfd;
 147      asection * section;
 148 {
 149   relent->address = reloc->r_vaddr;
 150   rtype2howto (relent, reloc);
 151
 152   if (reloc->r_symndx > 0)
 153     {
 154       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 155     }
 156   else
 157     {
 158       relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 159     }
 160
 161   relent->addend = reloc->r_offset;
 162   relent->address -= section->vma;
 163 }
 164
 165 static void
 166 extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
 167      bfd *in_abfd;
 168      struct bfd_link_info *link_info;
 169      struct bfd_link_order *link_order;
 170      arelent *reloc;
 171      bfd_byte *data;
 172      unsigned int *src_ptr;
 173      unsigned int *dst_ptr;
 174 {
 175   bfd_byte *d = data+*dst_ptr;
 176   asection *input_section = link_order->u.indirect.section;
 177   switch (reloc->howto->type)
 178     {
 179     case R_H8500_IMM8:
 180       bfd_put_8 (in_abfd,
 181                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 182                  d);
 183       (*dst_ptr) += 1;
 184       (*src_ptr) += 1;
 185       break;
 186
 187     case R_H8500_HIGH8:
 188       bfd_put_8 (in_abfd,
 189                  (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 190                   >> 16),
 191                  d );
 192       (*dst_ptr) += 1;
 193       (*src_ptr) += 1;
 194       break;
 195
 196     case R_H8500_IMM16:
 197       bfd_put_16 (in_abfd,
 198                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 199                   d  );
 200       (*dst_ptr) += 2;
 201       (*src_ptr) += 2;
 202       break;
 203
 204     case R_H8500_LOW16:
 205       bfd_put_16 (in_abfd,
 206                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 207                   d);
 208
 209       (*dst_ptr) += 2;
 210       (*src_ptr) += 2;
 211       break;
 212
 213     case R_H8500_HIGH16:
 214       bfd_put_16 (in_abfd,
 215                   (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 216                    >>16),
 217                   d);
 218
 219       (*dst_ptr) += 2;
 220       (*src_ptr) += 2;
 221       break;
 222
 223     case R_H8500_IMM24:
 224       {
 225         int v = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
 226         int o = bfd_get_32 (in_abfd, data+ *dst_ptr -1);
 227         v = (v & 0x00ffffff) | (o & 0xff00000);
 228         bfd_put_32 (in_abfd, v, data  + *dst_ptr -1);
 229         (*dst_ptr) +=3;
 230         (*src_ptr)+=3;;
 231       }
 232       break;
 233     case R_H8500_IMM32:
 234       {
 235         int v = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
 236         bfd_put_32 (in_abfd, v, data  + *dst_ptr);
 237         (*dst_ptr) +=4;
 238         (*src_ptr)+=4;;
 239       }
 240       break;
 241
 242     case R_H8500_PCREL8:
 243       {
 244         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 245                                                   input_section);
 246         bfd_vma dot = link_order->offset
 247           + *dst_ptr
 248             + link_order->u.indirect.section->output_section->vma;
 249         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 250                                     word and the pc's been incremented */
 251
 252         if (gap > 128 || gap < -128)
 253           {
 254             if (! ((*link_info->callbacks->reloc_overflow)
 255                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 256                     reloc->howto->name, reloc->addend, input_section->owner,
 257                     input_section, reloc->address)))
 258               abort ();
 259           }
 260         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 261         (*dst_ptr)++;
 262         (*src_ptr)++;
 263         break;
 264       }
 265     case R_H8500_PCREL16:
 266       {
 267         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 268                                                   input_section);
 269         bfd_vma dot = link_order->offset
 270           + *dst_ptr
 271             + link_order->u.indirect.section->output_section->vma;
 272         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 273                                     word and the pc's been incremented */
 274
 275         if (gap > 32767 || gap < -32768)
 276           {
 277             if (! ((*link_info->callbacks->reloc_overflow)
 278                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 279                     reloc->howto->name, reloc->addend, input_section->owner,
 280                     input_section, reloc->address)))
 281               abort ();
 282           }
 283         bfd_put_16 (in_abfd, gap, data + *dst_ptr);
 284         (*dst_ptr)+=2;
 285         (*src_ptr)+=2;
 286         break;
 287       }
 288
 289     default:
 290       abort ();
 291     }
 292 }
 293
 294 #define coff_reloc16_extra_cases extra_case
 295
 296 #include "coffcode.h"
 297
 298 #undef  coff_bfd_get_relocated_section_contents
 299 #undef coff_bfd_relax_section
 300 #define coff_bfd_get_relocated_section_contents \
 301   bfd_coff_reloc16_get_relocated_section_contents
 302 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 303
 304 CREATE_BIG_COFF_TARGET_VEC (h8500coff_vec, "coff-h8500", 0, 0, '_', NULL)