bfd/coff-h8500.c

   1 /* BFD back-end for Hitachi H8/500 COFF binaries.
   2    Copyright 1993, 1994, 1995, 1997, 1999, 2000, 2001
   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 static int  coff_h8500_select_reloc PARAMS ((reloc_howto_type *));
  32 static void rtype2howto      PARAMS ((arelent *, struct internal_reloc *));
  33 static void reloc_processing PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *));
  34 static void extra_case       PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *, bfd_byte *, unsigned int *, unsigned int *));
  35
  36 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
  37
  38 static reloc_howto_type r_imm8 =
  39 HOWTO (R_H8500_IMM8, 0, 1, 8, false, 0,
  40        complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff, false);
  41
  42 static reloc_howto_type r_imm16 =
  43 HOWTO (R_H8500_IMM16, 0, 1, 16, false, 0,
  44        complain_overflow_bitfield, 0, "r_imm16", true, 0x0000ffff, 0x0000ffff, false);
  45
  46 static reloc_howto_type r_imm24 =
  47 HOWTO (R_H8500_IMM24, 0, 1, 24, false, 0,
  48        complain_overflow_bitfield, 0, "r_imm24", true, 0x00ffffff, 0x00ffffff, false);
  49
  50 static reloc_howto_type r_imm32 =
  51 HOWTO (R_H8500_IMM32, 0, 1, 32, false, 0,
  52        complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff, 0xffffffff, false);
  53
  54 static reloc_howto_type r_high8 =
  55 HOWTO (R_H8500_HIGH8, 0, 1, 8, false, 0,
  56        complain_overflow_dont, 0, "r_high8", true, 0x000000ff, 0x000000ff, false);
  57
  58 static reloc_howto_type r_low16 =
  59 HOWTO (R_H8500_LOW16, 0, 1, 16, false, 0,
  60        complain_overflow_dont, 0, "r_low16", true, 0x0000ffff, 0x0000ffff, false);
  61
  62 static reloc_howto_type r_pcrel8 =
  63 HOWTO (R_H8500_PCREL8, 0, 1, 8, true, 0, complain_overflow_signed, 0, "r_pcrel8", true, 0, 0, true);
  64
  65 static reloc_howto_type r_pcrel16 =
  66 HOWTO (R_H8500_PCREL16, 0, 1, 16, true, 0, complain_overflow_signed, 0, "r_pcrel16", true, 0, 0, true);
  67
  68 static reloc_howto_type r_high16 =
  69 HOWTO (R_H8500_HIGH16, 0, 1, 8, false, 0,
  70        complain_overflow_dont, 0, "r_high16", true, 0x000ffff, 0x0000ffff, false);
  71 \f
  72 /* Turn a howto into a reloc number.  */
  73
  74 static int
  75 coff_h8500_select_reloc (howto)
  76      reloc_howto_type *howto;
  77 {
  78   return howto->type;
  79 }
  80
  81 #define SELECT_RELOC(x,howto) x.r_type = coff_h8500_select_reloc(howto)
  82
  83 #define BADMAG(x) H8500BADMAG(x)
  84 #define H8500 1                 /* Customize coffcode.h */
  85
  86 #define __A_MAGIC_SET__
  87
  88 /* Code to swap in the reloc.  */
  89 #define SWAP_IN_RELOC_OFFSET    H_GET_32
  90 #define SWAP_OUT_RELOC_OFFSET   H_PUT_32
  91 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  92   dst->r_stuff[0] = 'S'; \
  93   dst->r_stuff[1] = 'C';
  94
  95 /* Code to turn a r_type into a howto ptr, uses the above howto table.  */
  96
  97 static void
  98 rtype2howto (internal, dst)
  99      arelent * internal;
 100      struct internal_reloc *dst;
 101 {
 102   switch (dst->r_type)
 103     {
 104     default:
 105       abort ();
 106       break;
 107     case R_H8500_IMM8:
 108       internal->howto = &r_imm8;
 109       break;
 110     case R_H8500_IMM16:
 111       internal->howto = &r_imm16;
 112       break;
 113     case R_H8500_IMM24:
 114       internal->howto = &r_imm24;
 115       break;
 116     case R_H8500_IMM32:
 117       internal->howto = &r_imm32;
 118       break;
 119     case R_H8500_PCREL8:
 120       internal->howto = &r_pcrel8;
 121       break;
 122     case R_H8500_PCREL16:
 123       internal->howto = &r_pcrel16;
 124       break;
 125     case R_H8500_HIGH8:
 126       internal->howto = &r_high8;
 127       break;
 128     case R_H8500_HIGH16:
 129       internal->howto = &r_high16;
 130       break;
 131     case R_H8500_LOW16:
 132       internal->howto = &r_low16;
 133       break;
 134     }
 135 }
 136
 137 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 138
 139 /* Perform any necessary magic to the addend in a reloc entry.  */
 140
 141 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 142  cache_ptr->addend =  ext_reloc.r_offset;
 143
 144 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 145  reloc_processing(relent, reloc, symbols, abfd, section)
 146
 147 static void reloc_processing (relent, reloc, symbols, abfd, section)
 148      arelent * relent;
 149      struct internal_reloc *reloc;
 150      asymbol ** symbols;
 151      bfd * abfd;
 152      asection * section;
 153 {
 154   relent->address = reloc->r_vaddr;
 155   rtype2howto (relent, reloc);
 156
 157   if (reloc->r_symndx > 0)
 158     relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 159   else
 160     relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 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
 179   switch (reloc->howto->type)
 180     {
 181     case R_H8500_IMM8:
 182       bfd_put_8 (in_abfd,
 183                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 184                  d);
 185       (*dst_ptr) += 1;
 186       (*src_ptr) += 1;
 187       break;
 188
 189     case R_H8500_HIGH8:
 190       bfd_put_8 (in_abfd,
 191                  (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 192                   >> 16),
 193                  d);
 194       (*dst_ptr) += 1;
 195       (*src_ptr) += 1;
 196       break;
 197
 198     case R_H8500_IMM16:
 199       bfd_put_16 (in_abfd,
 200                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 201                   d);
 202       (*dst_ptr) += 2;
 203       (*src_ptr) += 2;
 204       break;
 205
 206     case R_H8500_LOW16:
 207       bfd_put_16 (in_abfd,
 208                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 209                   d);
 210
 211       (*dst_ptr) += 2;
 212       (*src_ptr) += 2;
 213       break;
 214
 215     case R_H8500_HIGH16:
 216       bfd_put_16 (in_abfd,
 217                   (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 218                    >> 16),
 219                   d);
 220
 221       (*dst_ptr) += 2;
 222       (*src_ptr) += 2;
 223       break;
 224
 225     case R_H8500_IMM24:
 226       {
 227         int v = bfd_coff_reloc16_get_value (reloc, link_info, input_section);
 228         int o = bfd_get_32 (in_abfd, data+ *dst_ptr -1);
 229         v = (v & 0x00ffffff) | (o & 0xff00000);
 230         bfd_put_32 (in_abfd, (bfd_vma) v, data  + *dst_ptr -1);
 231         (*dst_ptr) += 3;
 232         (*src_ptr) += 3;;
 233       }
 234       break;
 235     case R_H8500_IMM32:
 236       {
 237         int v = bfd_coff_reloc16_get_value (reloc, link_info, input_section);
 238         bfd_put_32 (in_abfd, (bfd_vma) v, data  + *dst_ptr);
 239         (*dst_ptr) += 4;
 240         (*src_ptr) += 4;;
 241       }
 242       break;
 243
 244     case R_H8500_PCREL8:
 245       {
 246         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 247                                                   input_section);
 248         bfd_vma dot = link_order->offset
 249           + *dst_ptr
 250             + link_order->u.indirect.section->output_section->vma;
 251         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 252                                     word and the pc's been incremented.  */
 253
 254         if (gap > 128 || gap < -128)
 255           {
 256             if (! ((*link_info->callbacks->reloc_overflow)
 257                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 258                     reloc->howto->name, reloc->addend, input_section->owner,
 259                     input_section, reloc->address)))
 260               abort ();
 261           }
 262         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 263         (*dst_ptr)++;
 264         (*src_ptr)++;
 265         break;
 266       }
 267     case R_H8500_PCREL16:
 268       {
 269         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 270                                                   input_section);
 271         bfd_vma dot = link_order->offset
 272           + *dst_ptr
 273             + link_order->u.indirect.section->output_section->vma;
 274         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 275                                     word and the pc's been incremented.  */
 276
 277         if (gap > 32767 || gap < -32768)
 278           {
 279             if (! ((*link_info->callbacks->reloc_overflow)
 280                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 281                     reloc->howto->name, reloc->addend, input_section->owner,
 282                     input_section, reloc->address)))
 283               abort ();
 284           }
 285         bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr);
 286         (*dst_ptr) += 2;
 287         (*src_ptr) += 2;
 288         break;
 289       }
 290
 291     default:
 292       abort ();
 293     }
 294 }
 295
 296 #define coff_reloc16_extra_cases extra_case
 297
 298 #include "coffcode.h"
 299
 300 #undef  coff_bfd_get_relocated_section_contents
 301 #undef coff_bfd_relax_section
 302 #define coff_bfd_get_relocated_section_contents \
 303   bfd_coff_reloc16_get_relocated_section_contents
 304 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 305
 306 CREATE_BIG_COFF_TARGET_VEC (h8500coff_vec, "coff-h8500", 0, 0, '_', NULL)