bfd/coff-h8500.c

   1 /* BFD back-end for Hitachi H8/500 COFF binaries.
   2    Copyright 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "libbfd.h"
  25 #include "obstack.h"
  26 #include "coff/h8500.h"
  27 #include "coff/internal.h"
  28 #include "libcoff.h"
  29 #include "seclet.h"
  30
  31 extern bfd_error_vector_type bfd_error_vector;
  32
  33 static reloc_howto_type r_imm8 =
  34 HOWTO (R_H8500_IMM8, 0, 1, 8, false, 0, true,
  35        true, 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, true,
  39        true, 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, true,
  43        true, 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, true,
  47        true, 0, "r_imm32", true, 0xffffffff, 0xffffffff, false);
  48
  49
  50 static reloc_howto_type r_high8 =
  51 HOWTO (R_H8500_HIGH8, 0, 1, 8, false, 0, true,
  52        true, 0, "r_high8", true, 0x000000ff, 0x000000ff, false);
  53
  54 static reloc_howto_type r_low16 =
  55 HOWTO (R_H8500_LOW16, 0, 1, 16, false, 0, true,
  56        true, 0, "r_low16", true, 0x0000ffff, 0x0000ffff, false);
  57
  58 static reloc_howto_type r_pcrel8 =
  59 HOWTO (R_H8500_PCREL8, 0, 1, 8, true, 0, true, true, 0, "r_pcrel8", true, 0, 0, true);
  60
  61
  62 static reloc_howto_type r_pcrel16 =
  63 HOWTO (R_H8500_PCREL16, 0, 1, 16, true, 0, true, true, 0, "r_pcrel16", true, 0, 0, true);
  64
  65 static reloc_howto_type r_high16 =
  66 HOWTO (R_H8500_HIGH16, 0, 1, 8, false, 0, true,
  67        true, 0, "r_high16", true, 0x000ffff, 0x0000ffff, false);
  68
  69
  70 /* Turn a howto into a reloc number */
  71
  72 static int
  73 coff_h8500_select_reloc (howto)
  74      reloc_howto_type *howto;
  75 {
  76   return howto->type;
  77 }
  78
  79 #define SELECT_RELOC(x,howto) x= coff_h8500_select_reloc(howto)
  80
  81
  82 #define BADMAG(x) H8500BADMAG(x)
  83 #define H8500 1                 /* Customize coffcode.h */
  84
  85 #define __A_MAGIC_SET__
  86
  87 /* Code to swap in the reloc */
  88 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  89 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  90 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  91   dst->r_stuff[0] = 'S'; \
  92   dst->r_stuff[1] = 'C';
  93
  94 /* Code to turn a r_type into a howto ptr, uses the above howto table
  95    */
  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       printf ("BAD 0x%x\n", dst->r_type);
 106     case R_H8500_IMM8:
 107       internal->howto = &r_imm8;
 108       break;
 109     case R_H8500_IMM16:
 110       internal->howto = &r_imm16;
 111       break;
 112     case R_H8500_IMM24:
 113       internal->howto = &r_imm24;
 114       break;
 115     case R_H8500_IMM32:
 116       internal->howto = &r_imm32;
 117       break;
 118     case R_H8500_PCREL8:
 119       internal->howto = &r_pcrel8;
 120       break;
 121     case R_H8500_PCREL16:
 122       internal->howto = &r_pcrel16;
 123       break;
 124     case R_H8500_HIGH8:
 125       internal->howto = &r_high8;
 126       break;
 127     case R_H8500_HIGH16:
 128       internal->howto = &r_high16;
 129       break;
 130     case R_H8500_LOW16:
 131       internal->howto = &r_low16;
 132       break;
 133     }
 134 }
 135
 136 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 137
 138
 139 /* Perform any necessaru magic to the addend in a reloc entry */
 140
 141
 142 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 143  cache_ptr->addend =  ext_reloc.r_offset;
 144
 145
 146 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 147  reloc_processing(relent, reloc, symbols, abfd, section)
 148
 149 static void reloc_processing (relent, reloc, symbols, abfd, section)
 150      arelent * relent;
 151      struct internal_reloc *reloc;
 152      asymbol ** symbols;
 153      bfd * abfd;
 154      asection * section;
 155 {
 156   relent->address = reloc->r_vaddr;
 157   rtype2howto (relent, reloc);
 158
 159   if (reloc->r_symndx > 0)
 160     {
 161       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 162     }
 163   else
 164     {
 165       relent->sym_ptr_ptr = &(bfd_abs_symbol);
 166     }
 167
 168
 169   relent->addend = reloc->r_offset;
 170   relent->address -= section->vma;
 171 }
 172
 173 static void
 174 extra_case (in_abfd, seclet, reloc, data, src_ptr, dst_ptr)
 175      bfd *in_abfd;
 176      bfd_seclet_type *seclet;
 177      arelent *reloc;
 178      bfd_byte *data;
 179      unsigned int *src_ptr;
 180      unsigned int *dst_ptr;
 181 {
 182   bfd_byte *d = data+*dst_ptr;
 183   switch (reloc->howto->type)
 184     {
 185     case R_H8500_IMM8:
 186       bfd_put_8 (in_abfd,
 187                  bfd_coff_reloc16_get_value (reloc, seclet),
 188                  d);
 189       (*dst_ptr) += 1;
 190       (*src_ptr) += 1;
 191       break;
 192
 193     case R_H8500_HIGH8:
 194       bfd_put_8 (in_abfd,
 195                  (bfd_coff_reloc16_get_value (reloc, seclet)>>16),
 196                  d );
 197       (*dst_ptr) += 1;
 198       (*src_ptr) += 1;
 199       break;
 200
 201     case R_H8500_IMM16:
 202       bfd_put_16 (in_abfd,
 203                   bfd_coff_reloc16_get_value (reloc, seclet) ,
 204                   d  );
 205       (*dst_ptr) += 2;
 206       (*src_ptr) += 2;
 207       break;
 208
 209     case R_H8500_LOW16:
 210       bfd_put_16 (in_abfd,
 211                   bfd_coff_reloc16_get_value (reloc, seclet) ,
 212                   d);
 213
 214       (*dst_ptr) += 2;
 215       (*src_ptr) += 2;
 216       break;
 217
 218     case R_H8500_HIGH16:
 219       bfd_put_16 (in_abfd,
 220                   bfd_coff_reloc16_get_value (reloc, seclet)>>16 ,
 221                   d);
 222
 223       (*dst_ptr) += 2;
 224       (*src_ptr) += 2;
 225       break;
 226
 227     case R_H8500_IMM24:
 228       {
 229         int v = bfd_coff_reloc16_get_value(reloc, seclet);
 230         int o = bfd_get_32(in_abfd, data+ *dst_ptr -1);
 231         v = (v & 0x00ffffff) | (o & 0xff00000);
 232         bfd_put_32 (in_abfd, v, data  + *dst_ptr -1);
 233         (*dst_ptr) +=3;
 234         (*src_ptr)+=3;;
 235       }
 236       break;
 237     case R_H8500_IMM32:
 238       {
 239         int v = bfd_coff_reloc16_get_value(reloc, seclet);
 240         bfd_put_32 (in_abfd, v, data  + *dst_ptr);
 241         (*dst_ptr) +=4;
 242         (*src_ptr)+=4;;
 243       }
 244       break;
 245
 246
 247     case R_H8500_PCREL8:
 248       {
 249         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, seclet);
 250         bfd_vma dot = seclet->offset
 251           + *dst_ptr
 252             + seclet->u.indirect.section->output_section->vma;
 253         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 254                                     word and the pc's been incremented */
 255
 256         if (gap > 128 || gap < -128)
 257           {
 258             bfd_error_vector.reloc_value_truncated (reloc, seclet);
 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, seclet);
 268         bfd_vma dot = seclet->offset
 269           + *dst_ptr
 270             + seclet->u.indirect.section->output_section->vma;
 271         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 272                                     word and the pc's been incremented */
 273
 274         if (gap > 32767 || gap < -32768)
 275           {
 276             bfd_error_vector.reloc_value_truncated (reloc, seclet);
 277           }
 278         bfd_put_16 (in_abfd, gap, data + *dst_ptr);
 279         (*dst_ptr)+=2;
 280         (*src_ptr)+=2;
 281         break;
 282       }
 283
 284     default:
 285       abort ();
 286     }
 287 }
 288
 289 #define coff_reloc16_extra_cases extra_case
 290
 291 #include "coffcode.h"
 292
 293
 294 #undef  coff_bfd_get_relocated_section_contents
 295 #undef coff_bfd_relax_section
 296 #define  coff_bfd_get_relocated_section_contents bfd_coff_reloc16_get_relocated_section_contents
 297 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 298
 299 bfd_target h8500coff_vec =
 300 {
 301   "coff-h8500",                 /* name */
 302   bfd_target_coff_flavour,
 303   true,                         /* data byte order is big */
 304   true,                         /* header byte order is big */
 305
 306   (HAS_RELOC | EXEC_P |         /* object flags */
 307    HAS_LINENO | HAS_DEBUG |
 308    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
 309
 310   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),        /* section flags */
 311   '_',                          /* leading symbol underscore */
 312   '/',                          /* ar_pad_char */
 313   15,                           /* ar_max_namelen */
 314   1,                            /* minimum section alignment */
 315   _do_getb64, _do_getb_signed_64, _do_putb64,
 316      _do_getb32, _do_getb_signed_32, _do_putb32,
 317      _do_getb16, _do_getb_signed_16, _do_putb16,        /* data */
 318   _do_getb64, _do_getb_signed_64, _do_putb64,
 319      _do_getb32, _do_getb_signed_32, _do_putb32,
 320      _do_getb16, _do_getb_signed_16, _do_putb16,        /* hdrs */
 321
 322   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 323    bfd_generic_archive_p, _bfd_dummy_target},
 324   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 325    bfd_false},
 326   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 327    _bfd_write_archive_contents, bfd_false},
 328
 329   JUMP_TABLE (coff),
 330   COFF_SWAP_TABLE,
 331 };