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., 675 Mass Ave, Cambridge, MA 02139, 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 static reloc_howto_type r_imm8 =
  32 HOWTO (R_H8500_IMM8, 0, 1, 8, false, 0,
  33        complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff, false);
  34
  35 static reloc_howto_type r_imm16 =
  36 HOWTO (R_H8500_IMM16, 0, 1, 16, false, 0,
  37        complain_overflow_bitfield, 0, "r_imm16", true, 0x0000ffff, 0x0000ffff, false);
  38
  39 static reloc_howto_type r_imm24 =
  40 HOWTO (R_H8500_IMM24, 0, 1, 24, false, 0,
  41        complain_overflow_bitfield, 0, "r_imm24", true, 0x00ffffff, 0x00ffffff, false);
  42
  43 static reloc_howto_type r_imm32 =
  44 HOWTO (R_H8500_IMM32, 0, 1, 32, false, 0,
  45        complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff, 0xffffffff, false);
  46
  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
  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
  68 /* Turn a howto into a reloc number */
  69
  70 static int
  71 coff_h8500_select_reloc (howto)
  72      reloc_howto_type *howto;
  73 {
  74   return howto->type;
  75 }
  76
  77 #define SELECT_RELOC(x,howto) x.r_type = coff_h8500_select_reloc(howto)
  78
  79
  80 #define BADMAG(x) H8500BADMAG(x)
  81 #define H8500 1                 /* Customize coffcode.h */
  82
  83 #define __A_MAGIC_SET__
  84
  85 /* Code to swap in the reloc */
  86 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  87 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  88 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  89   dst->r_stuff[0] = 'S'; \
  90   dst->r_stuff[1] = 'C';
  91
  92 /* Code to turn a r_type into a howto ptr, uses the above howto table
  93    */
  94
  95 static void
  96 rtype2howto(internal, dst)
  97      arelent * internal;
  98      struct internal_reloc *dst;
  99 {
 100   switch (dst->r_type)
 101     {
 102     default:
 103       fprintf (stderr, "BAD 0x%x\n", dst->r_type);
 104     case R_H8500_IMM8:
 105       internal->howto = &r_imm8;
 106       break;
 107     case R_H8500_IMM16:
 108       internal->howto = &r_imm16;
 109       break;
 110     case R_H8500_IMM24:
 111       internal->howto = &r_imm24;
 112       break;
 113     case R_H8500_IMM32:
 114       internal->howto = &r_imm32;
 115       break;
 116     case R_H8500_PCREL8:
 117       internal->howto = &r_pcrel8;
 118       break;
 119     case R_H8500_PCREL16:
 120       internal->howto = &r_pcrel16;
 121       break;
 122     case R_H8500_HIGH8:
 123       internal->howto = &r_high8;
 124       break;
 125     case R_H8500_HIGH16:
 126       internal->howto = &r_high16;
 127       break;
 128     case R_H8500_LOW16:
 129       internal->howto = &r_low16;
 130       break;
 131     }
 132 }
 133
 134 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 135
 136
 137 /* Perform any necessaru magic to the addend in a reloc entry */
 138
 139
 140 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 141  cache_ptr->addend =  ext_reloc.r_offset;
 142
 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     {
 159       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 160     }
 161   else
 162     {
 163       relent->sym_ptr_ptr = &(bfd_abs_symbol);
 164     }
 165
 166
 167   relent->addend = reloc->r_offset;
 168   relent->address -= section->vma;
 169 }
 170
 171 static void
 172 extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
 173      bfd *in_abfd;
 174      struct bfd_link_info *link_info;
 175      struct bfd_link_order *link_order;
 176      arelent *reloc;
 177      bfd_byte *data;
 178      unsigned int *src_ptr;
 179      unsigned int *dst_ptr;
 180 {
 181   bfd_byte *d = data+*dst_ptr;
 182   asection *input_section = link_order->u.indirect.section;
 183   switch (reloc->howto->type)
 184     {
 185     case R_H8500_IMM8:
 186       bfd_put_8 (in_abfd,
 187                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 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, link_info, input_section)
 196                   >> 16),
 197                  d );
 198       (*dst_ptr) += 1;
 199       (*src_ptr) += 1;
 200       break;
 201
 202     case R_H8500_IMM16:
 203       bfd_put_16 (in_abfd,
 204                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 205                   d  );
 206       (*dst_ptr) += 2;
 207       (*src_ptr) += 2;
 208       break;
 209
 210     case R_H8500_LOW16:
 211       bfd_put_16 (in_abfd,
 212                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 213                   d);
 214
 215       (*dst_ptr) += 2;
 216       (*src_ptr) += 2;
 217       break;
 218
 219     case R_H8500_HIGH16:
 220       bfd_put_16 (in_abfd,
 221                   (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
 222                    >>16),
 223                   d);
 224
 225       (*dst_ptr) += 2;
 226       (*src_ptr) += 2;
 227       break;
 228
 229     case R_H8500_IMM24:
 230       {
 231         int v = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
 232         int o = bfd_get_32(in_abfd, data+ *dst_ptr -1);
 233         v = (v & 0x00ffffff) | (o & 0xff00000);
 234         bfd_put_32 (in_abfd, v, data  + *dst_ptr -1);
 235         (*dst_ptr) +=3;
 236         (*src_ptr)+=3;;
 237       }
 238       break;
 239     case R_H8500_IMM32:
 240       {
 241         int v = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
 242         bfd_put_32 (in_abfd, v, data  + *dst_ptr);
 243         (*dst_ptr) +=4;
 244         (*src_ptr)+=4;;
 245       }
 246       break;
 247
 248
 249     case R_H8500_PCREL8:
 250       {
 251         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 252                                                   input_section);
 253         bfd_vma dot = link_order->offset
 254           + *dst_ptr
 255             + link_order->u.indirect.section->output_section->vma;
 256         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 257                                     word and the pc's been incremented */
 258
 259         if (gap > 128 || gap < -128)
 260           {
 261             if (! ((*link_info->callbacks->reloc_overflow)
 262                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 263                     reloc->howto->name, reloc->addend, input_section->owner,
 264                     input_section, reloc->address)))
 265               abort ();
 266           }
 267         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 268         (*dst_ptr)++;
 269         (*src_ptr)++;
 270         break;
 271       }
 272     case R_H8500_PCREL16:
 273       {
 274         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 275                                                   input_section);
 276         bfd_vma dot = link_order->offset
 277           + *dst_ptr
 278             + link_order->u.indirect.section->output_section->vma;
 279         int gap = dst - dot - 1; /* -1 since were in the odd byte of the
 280                                     word and the pc's been incremented */
 281
 282         if (gap > 32767 || gap < -32768)
 283           {
 284             if (! ((*link_info->callbacks->reloc_overflow)
 285                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 286                     reloc->howto->name, reloc->addend, input_section->owner,
 287                     input_section, reloc->address)))
 288               abort ();
 289           }
 290         bfd_put_16 (in_abfd, gap, data + *dst_ptr);
 291         (*dst_ptr)+=2;
 292         (*src_ptr)+=2;
 293         break;
 294       }
 295
 296     default:
 297       abort ();
 298     }
 299 }
 300
 301 #define coff_reloc16_extra_cases extra_case
 302
 303 #include "coffcode.h"
 304
 305
 306 #undef  coff_bfd_get_relocated_section_contents
 307 #undef coff_bfd_relax_section
 308 #define coff_bfd_get_relocated_section_contents \
 309   bfd_coff_reloc16_get_relocated_section_contents
 310 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 311
 312 const bfd_target h8500coff_vec =
 313 {
 314   "coff-h8500",                 /* name */
 315   bfd_target_coff_flavour,
 316   true,                         /* data byte order is big */
 317   true,                         /* header byte order is big */
 318
 319   (HAS_RELOC | EXEC_P |         /* object flags */
 320    HAS_LINENO | HAS_DEBUG |
 321    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 322
 323   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),        /* section flags */
 324   '_',                          /* leading symbol underscore */
 325   '/',                          /* ar_pad_char */
 326   15,                           /* ar_max_namelen */
 327   1,                            /* minimum section alignment */
 328   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 329      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 330      bfd_getb16, bfd_getb_signed_16, bfd_putb16,        /* data */
 331   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 332      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 333      bfd_getb16, bfd_getb_signed_16, bfd_putb16,        /* hdrs */
 334
 335   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 336    bfd_generic_archive_p, _bfd_dummy_target},
 337   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 338    bfd_false},
 339   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 340    _bfd_write_archive_contents, bfd_false},
 341
 342      BFD_JUMP_TABLE_GENERIC (coff),
 343      BFD_JUMP_TABLE_COPY (coff),
 344      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 345      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 346      BFD_JUMP_TABLE_SYMBOLS (coff),
 347      BFD_JUMP_TABLE_RELOCS (coff),
 348      BFD_JUMP_TABLE_WRITE (coff),
 349      BFD_JUMP_TABLE_LINK (coff),
 350      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 351
 352   COFF_SWAP_TABLE,
 353 };