bfd/coff-z8k.c

   1 /* BFD back-end for Zilog Z800n COFF binaries.
   2    Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000
   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/z8k.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_imm32 =
  34 HOWTO (R_IMM32, 0, 1, 32, false, 0,
  35        complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff,
  36        0xffffffff, false);
  37
  38 static reloc_howto_type r_imm4l =
  39 HOWTO (R_IMM4L, 0, 1, 4, false, 0,
  40        complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false);
  41
  42 static reloc_howto_type r_da =
  43 HOWTO (R_IMM16, 0, 1, 16, false, 0,
  44        complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff,
  45        false);
  46
  47 static reloc_howto_type r_imm8 =
  48 HOWTO (R_IMM8, 0, 1, 8, false, 0,
  49        complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff,
  50        false);
  51
  52 static reloc_howto_type r_rel16 =
  53 HOWTO (R_REL16, 0, 1, 16, false, 0,
  54        complain_overflow_bitfield, 0, "r_rel16", true, 0x0000ffff, 0x0000ffff,
  55        true);
  56
  57 static reloc_howto_type r_jr =
  58 HOWTO (R_JR, 0, 1, 8, true, 0, complain_overflow_signed, 0,
  59        "r_jr", true, 0, 0, true);
  60
  61 static reloc_howto_type r_disp7 =
  62 HOWTO (R_DISP7, 0, 1, 7, true, 0, complain_overflow_bitfield, 0,
  63        "r_disp7", true, 0, 0, true);
  64
  65 static reloc_howto_type r_callr =
  66 HOWTO (R_CALLR, 0, 1, 12, true, 0, complain_overflow_signed, 0,
  67        "r_callr", true, 0xfff, 0xfff, true);
  68
  69 /* Turn a howto into a reloc number */
  70
  71 static int
  72 coff_z8k_select_reloc (howto)
  73      reloc_howto_type *howto;
  74 {
  75   return howto->type;
  76 }
  77
  78 #define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)
  79
  80 #define BADMAG(x) Z8KBADMAG(x)
  81 #define Z8K 1                   /* Customize coffcode.h */
  82 #define __A_MAGIC_SET__
  83
  84 /* Code to swap in the reloc */
  85 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  86 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  87 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  88   dst->r_stuff[0] = 'S'; \
  89   dst->r_stuff[1] = 'C';
  90
  91 /* Code to turn a r_type into a howto ptr, uses the above howto table
  92    */
  93
  94 static void
  95 rtype2howto (internal, dst)
  96      arelent * internal;
  97      struct internal_reloc *dst;
  98 {
  99   switch (dst->r_type)
 100     {
 101     default:
 102       abort ();
 103       break;
 104     case R_IMM8:
 105       internal->howto = &r_imm8;
 106       break;
 107      case R_IMM16:
 108       internal->howto = &r_da;
 109       break;
 110     case R_JR:
 111       internal->howto = &r_jr;
 112       break;
 113     case R_DISP7:
 114       internal->howto = &r_disp7;
 115       break;
 116     case R_CALLR:
 117       internal->howto = &r_callr;
 118       break;
 119     case R_REL16:
 120       internal->howto = &r_rel16;
 121       break;
 122     case R_IMM32:
 123       internal->howto = &r_imm32;
 124       break;
 125     case R_IMM4L:
 126       internal->howto = &r_imm4l;
 127       break;
 128     }
 129 }
 130
 131 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 132
 133 /* Perform any necessary magic to the addend in a reloc entry */
 134
 135 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 136  cache_ptr->addend =  ext_reloc.r_offset;
 137
 138 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 139  reloc_processing(relent, reloc, symbols, abfd, section)
 140
 141 static void
 142 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   asection *input_section = link_order->u.indirect.section;
 176
 177   switch (reloc->howto->type)
 178     {
 179     case R_IMM8:
 180       bfd_put_8 (in_abfd,
 181                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 182                  data + *dst_ptr);
 183       (*dst_ptr) += 1;
 184       (*src_ptr) += 1;
 185       break;
 186
 187     case R_IMM32:
 188       bfd_put_32 (in_abfd,
 189                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 190                   data + *dst_ptr);
 191       (*dst_ptr) += 4;
 192       (*src_ptr) += 4;
 193       break;
 194
 195     case R_IMM4L:
 196       bfd_put_8 (in_abfd,
 197                  ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
 198                   | (0x0f
 199                      & bfd_coff_reloc16_get_value (reloc, link_info,
 200                                                    input_section))),
 201                  data + *dst_ptr);
 202       (*dst_ptr) += 1;
 203       (*src_ptr) += 1;
 204       break;
 205
 206     case R_IMM16:
 207       bfd_put_16 (in_abfd,
 208                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 209                   data + *dst_ptr);
 210       (*dst_ptr) += 2;
 211       (*src_ptr) += 2;
 212       break;
 213
 214     case R_JR:
 215       {
 216         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 217                                                   input_section);
 218         bfd_vma dot = (link_order->offset
 219                        + *dst_ptr
 220                        + input_section->output_section->vma);
 221         int gap = dst - dot - 1;/* -1 since were in the odd byte of the
 222                                     word and the pc's been incremented */
 223
 224         if (gap & 1)
 225           abort ();
 226         gap /= 2;
 227         if (gap > 128 || gap < -128)
 228           {
 229             if (! ((*link_info->callbacks->reloc_overflow)
 230                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 231                     reloc->howto->name, reloc->addend, input_section->owner,
 232                     input_section, reloc->address)))
 233               abort ();
 234           }
 235         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 236         (*dst_ptr)++;
 237         (*src_ptr)++;
 238         break;
 239       }
 240
 241     case R_DISP7:
 242       {
 243         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 244                                                   input_section);
 245         bfd_vma dot = (link_order->offset
 246                        + *dst_ptr
 247                        + input_section->output_section->vma);
 248         int gap = dst - dot - 1;/* -1 since were in the odd byte of the
 249                                     word and the pc's been incremented */
 250
 251         if (gap & 1)
 252           abort ();
 253         gap /= 2;
 254
 255         if (gap > 0 || gap < -128)
 256           {
 257             if (! ((*link_info->callbacks->reloc_overflow)
 258                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 259                     reloc->howto->name, reloc->addend, input_section->owner,
 260                     input_section, reloc->address)))
 261               abort ();
 262           }
 263         bfd_put_8 (in_abfd,
 264                    (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f),
 265                    data + *dst_ptr);
 266         (*dst_ptr)++;
 267         (*src_ptr)++;
 268         break;
 269       }
 270
 271     case R_CALLR:
 272       {
 273         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 274                                                   input_section);
 275         bfd_vma dot = (link_order->offset
 276                        + *dst_ptr
 277                        + input_section->output_section->vma);
 278         int gap = dst - dot - 2;
 279
 280         if (gap & 1)
 281           abort ();
 282         gap /= 2;
 283         if (gap > 8191 || gap < -8192)
 284           {
 285             if (! ((*link_info->callbacks->reloc_overflow)
 286                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 287                     reloc->howto->name, reloc->addend, input_section->owner,
 288                     input_section, reloc->address)))
 289               abort ();
 290           }
 291         bfd_put_16 (in_abfd,
 292                     (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff),
 293                     data + *dst_ptr);
 294         (*dst_ptr) += 2;
 295         (*src_ptr) += 2;
 296         break;
 297       }
 298
 299     case R_REL16:
 300       {
 301         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 302                                                   input_section);
 303         bfd_vma dot = (link_order->offset
 304                        + *dst_ptr
 305                        + input_section->output_section->vma);
 306         int gap = dst - dot - 2;
 307
 308         if (gap > 32767 || gap < -32768)
 309           {
 310             if (! ((*link_info->callbacks->reloc_overflow)
 311                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 312                     reloc->howto->name, reloc->addend, input_section->owner,
 313                     input_section, reloc->address)))
 314               abort ();
 315           }
 316         bfd_put_16 (in_abfd,gap,data + *dst_ptr);
 317         (*dst_ptr) += 2;
 318         (*src_ptr) += 2;
 319         break;
 320       }
 321     default:
 322       abort ();
 323     }
 324 }
 325
 326 #define coff_reloc16_extra_cases extra_case
 327
 328 #include "coffcode.h"
 329
 330 #undef  coff_bfd_get_relocated_section_contents
 331 #undef coff_bfd_relax_section
 332 #define coff_bfd_get_relocated_section_contents \
 333   bfd_coff_reloc16_get_relocated_section_contents
 334 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 335
 336 CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL)