bfd/coff-h8500.c

   1 /* BFD back-end for Hitachi H8/500 COFF binaries.
   2    Copyright 1993, 1994 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 "obstack.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
  50 static reloc_howto_type r_high8 =
  51 HOWTO (R_H8500_HIGH8, 0, 1, 8, false, 0,
  52        complain_overflow_dont, 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,
  56        complain_overflow_dont, 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, complain_overflow_signed, 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, complain_overflow_signed, 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,
  67        complain_overflow_dont, 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.r_type = 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       fprintf (stderr, "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_section_ptr->symbol_ptr_ptr;
 166     }
 167
 168
 169   relent->addend = reloc->r_offset;
 170   relent->address -= section->vma;
 171 }
 172
 173 static void
 174 extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
 175      bfd *in_abfd;
 176      struct bfd_link_info *link_info;
 177      struct bfd_link_order *link_order;
 178      arelent *reloc;
 179      bfd_byte *data;
 180      unsigned int *src_ptr;
 181      unsigned int *dst_ptr;
 182 {
 183   bfd_byte *d = data+*dst_ptr;
 184   asection *input_section = link_order->u.indirect.section;
 185   switch (reloc->howto->type)
 186     {
 187     case R_H8500_IMM8:
 188       bfd_put_8 (in_abfd,
 189                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 190                  d);
 191       (*dst_ptr) += 1;
 192       (*src_ptr) += 1;
 193       break;
 194
 195     case R_H8500_HIGH8:
 196       bfd_put_8 (in_abfd,
 197                  (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 198                   >> 16),
 199                  d );
 200       (*dst_ptr) += 1;
 201       (*src_ptr) += 1;
 202       break;
 203
 204     case R_H8500_IMM16:
 205       bfd_put_16 (in_abfd,
 206                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 207                   d  );
 208       (*dst_ptr) += 2;
 209       (*src_ptr) += 2;
 210       break;
 211
 212     case R_H8500_LOW16:
 213       bfd_put_16 (in_abfd,
 214                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 215                   d);
 216
 217       (*dst_ptr) += 2;
 218       (*src_ptr) += 2;
 219       break;
 220
 221     case R_H8500_HIGH16:
 222       bfd_put_16 (in_abfd,
 223                   (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 224                    >>16),
 225                   d);
 226
 227       (*dst_ptr) += 2;
 228       (*src_ptr) += 2;
 229       break;
 230
 231     case R_H8500_IMM24:
 232       {
 233         int v = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
 234         int o = bfd_get_32(in_abfd, data+ *dst_ptr -1);
 235         v = (v & 0x00ffffff) | (o & 0xff00000);
 236         bfd_put_32 (in_abfd, v, data  + *dst_ptr -1);
 237         (*dst_ptr) +=3;
 238         (*src_ptr)+=3;;
 239       }
 240       break;
 241     case R_H8500_IMM32:
 242       {
 243         int v = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
 244         bfd_put_32 (in_abfd, v, data  + *dst_ptr);
 245         (*dst_ptr) +=4;
 246         (*src_ptr)+=4;;
 247       }
 248       break;
 249
 250
 251     case R_H8500_PCREL8:
 252       {
 253         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 254                                                   input_section);
 255         bfd_vma dot = link_order->offset
 256           + *dst_ptr
 257             + link_order->u.indirect.section->output_section->vma;
 258         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 259                                     word and the pc's been incremented */
 260
 261         if (gap > 128 || gap < -128)
 262           {
 263             if (! ((*link_info->callbacks->reloc_overflow)
 264                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 265                     reloc->howto->name, reloc->addend, input_section->owner,
 266                     input_section, reloc->address)))
 267               abort ();
 268           }
 269         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 270         (*dst_ptr)++;
 271         (*src_ptr)++;
 272         break;
 273       }
 274     case R_H8500_PCREL16:
 275       {
 276         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 277                                                   input_section);
 278         bfd_vma dot = link_order->offset
 279           + *dst_ptr
 280             + link_order->u.indirect.section->output_section->vma;
 281         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 282                                     word and the pc's been incremented */
 283
 284         if (gap > 32767 || gap < -32768)
 285           {
 286             if (! ((*link_info->callbacks->reloc_overflow)
 287                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 288                     reloc->howto->name, reloc->addend, input_section->owner,
 289                     input_section, reloc->address)))
 290               abort ();
 291           }
 292         bfd_put_16 (in_abfd, gap, data + *dst_ptr);
 293         (*dst_ptr)+=2;
 294         (*src_ptr)+=2;
 295         break;
 296       }
 297
 298     default:
 299       abort ();
 300     }
 301 }
 302
 303 #define coff_reloc16_extra_cases extra_case
 304
 305 #include "coffcode.h"
 306
 307
 308 #undef  coff_bfd_get_relocated_section_contents
 309 #undef coff_bfd_relax_section
 310 #define coff_bfd_get_relocated_section_contents \
 311   bfd_coff_reloc16_get_relocated_section_contents
 312 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 313
 314 const bfd_target h8500coff_vec =
 315 {
 316   "coff-h8500",                 /* name */
 317   bfd_target_coff_flavour,
 318   true,                         /* data byte order is big */
 319   true,                         /* header byte order is big */
 320
 321   (HAS_RELOC | EXEC_P |         /* object flags */
 322    HAS_LINENO | HAS_DEBUG |
 323    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 324
 325   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),        /* section flags */
 326   '_',                          /* leading symbol underscore */
 327   '/',                          /* ar_pad_char */
 328   15,                           /* ar_max_namelen */
 329   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 330      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 331      bfd_getb16, bfd_getb_signed_16, bfd_putb16,        /* data */
 332   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 333      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 334      bfd_getb16, bfd_getb_signed_16, bfd_putb16,        /* hdrs */
 335
 336   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 337    bfd_generic_archive_p, _bfd_dummy_target},
 338   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 339    bfd_false},
 340   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 341    _bfd_write_archive_contents, bfd_false},
 342
 343      BFD_JUMP_TABLE_GENERIC (coff),
 344      BFD_JUMP_TABLE_COPY (coff),
 345      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 346      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 347      BFD_JUMP_TABLE_SYMBOLS (coff),
 348      BFD_JUMP_TABLE_RELOCS (coff),
 349      BFD_JUMP_TABLE_WRITE (coff),
 350      BFD_JUMP_TABLE_LINK (coff),
 351      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 352
 353   COFF_SWAP_TABLE,
 354 };