bfd/coff-z8k.c

   1 /* BFD back-end for Zilog Z800n COFF binaries.
   2    Copyright 1992, 93, 94, 95, 1997 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 "libbfd.h"
  25 #include "bfdlink.h"
  26 #include "coff/z8k.h"
  27 #include "coff/internal.h"
  28 #include "libcoff.h"
  29
  30 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
  31
  32 static reloc_howto_type r_imm32 =
  33 HOWTO (R_IMM32, 0, 1, 32, false, 0,
  34        complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff,
  35        0xffffffff, false);
  36
  37 static reloc_howto_type r_imm4l =
  38 HOWTO (R_IMM4L, 0, 1, 4, false, 0,
  39        complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false);
  40
  41 static reloc_howto_type r_da =
  42 HOWTO (R_IMM16, 0, 1, 16, false, 0,
  43        complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff,
  44        false);
  45
  46 static reloc_howto_type r_imm8 =
  47 HOWTO (R_IMM8, 0, 1, 8, false, 0,
  48        complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff,
  49        false);
  50
  51 static reloc_howto_type r_jr =
  52 HOWTO (R_JR, 0, 1, 8, true, 0, complain_overflow_signed, 0,
  53        "r_jr", true, 0, 0, true);
  54
  55 /* Turn a howto into a reloc number */
  56
  57 static int
  58 coff_z8k_select_reloc (howto)
  59      reloc_howto_type *howto;
  60 {
  61   return howto->type;
  62 }
  63
  64 #define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)
  65
  66
  67 #define BADMAG(x) Z8KBADMAG(x)
  68 #define Z8K 1                   /* Customize coffcode.h */
  69 #define __A_MAGIC_SET__
  70
  71
  72
  73 /* Code to swap in the reloc */
  74 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  75 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  76 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  77   dst->r_stuff[0] = 'S'; \
  78   dst->r_stuff[1] = 'C';
  79
  80 /* Code to turn a r_type into a howto ptr, uses the above howto table
  81    */
  82
  83 static void
  84 rtype2howto (internal, dst)
  85      arelent * internal;
  86      struct internal_reloc *dst;
  87 {
  88   switch (dst->r_type)
  89     {
  90     default:
  91       abort ();
  92       break;
  93     case R_IMM8:
  94       internal->howto = &r_imm8;
  95       break;
  96      case R_IMM16:
  97       internal->howto = &r_da;
  98       break;
  99     case R_JR:
 100       internal->howto = &r_jr;
 101       break;
 102     case R_IMM32:
 103       internal->howto = &r_imm32;
 104       break;
 105     case R_IMM4L:
 106       internal->howto = &r_imm4l;
 107       break;
 108     }
 109 }
 110
 111 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 112
 113
 114 /* Perform any necessary magic to the addend in a reloc entry */
 115
 116
 117 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 118  cache_ptr->addend =  ext_reloc.r_offset;
 119
 120
 121 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 122  reloc_processing(relent, reloc, symbols, abfd, section)
 123
 124 static void
 125 reloc_processing (relent, reloc, symbols, abfd, section)
 126      arelent * relent;
 127      struct internal_reloc *reloc;
 128      asymbol ** symbols;
 129      bfd * abfd;
 130      asection * section;
 131 {
 132   relent->address = reloc->r_vaddr;
 133   rtype2howto (relent, reloc);
 134
 135   if (reloc->r_symndx > 0)
 136     {
 137       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 138     }
 139   else
 140     {
 141       relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 142     }
 143
 144
 145   relent->addend = reloc->r_offset;
 146   relent->address -= section->vma;
 147 }
 148
 149 static void
 150 extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
 151      bfd *in_abfd;
 152      struct bfd_link_info *link_info;
 153      struct bfd_link_order *link_order;
 154      arelent *reloc;
 155      bfd_byte *data;
 156      unsigned int *src_ptr;
 157      unsigned int *dst_ptr;
 158 {
 159   asection *input_section = link_order->u.indirect.section;
 160
 161   switch (reloc->howto->type)
 162     {
 163     case R_IMM8:
 164       bfd_put_8 (in_abfd,
 165                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 166                  data + *dst_ptr);
 167       (*dst_ptr) += 1;
 168       (*src_ptr) += 1;
 169       break;
 170
 171     case R_IMM32:
 172       bfd_put_32 (in_abfd,
 173                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 174                   data + *dst_ptr);
 175       (*dst_ptr) += 4;
 176       (*src_ptr) += 4;
 177       break;
 178
 179     case R_IMM4L:
 180       bfd_put_8 (in_abfd,
 181                  ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
 182                   | (0x0f
 183                      & bfd_coff_reloc16_get_value (reloc, link_info,
 184                                                    input_section))),
 185                  data + *dst_ptr);
 186       (*dst_ptr) += 1;
 187       (*src_ptr) += 1;
 188       break;
 189
 190     case R_IMM16:
 191       bfd_put_16 (in_abfd,
 192                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 193                   data + *dst_ptr);
 194       (*dst_ptr) += 2;
 195       (*src_ptr) += 2;
 196       break;
 197
 198     case R_JR:
 199       {
 200         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 201                                                   input_section);
 202         bfd_vma dot = (link_order->offset
 203                        + *dst_ptr
 204                        + input_section->output_section->vma);
 205         int gap = dst - dot - 1;/* -1 since were in the odd byte of the
 206                                     word and the pc's been incremented */
 207
 208         if (gap & 1)
 209           abort ();
 210         gap /= 2;
 211         if (gap > 128 || gap < -128)
 212           {
 213             if (! ((*link_info->callbacks->reloc_overflow)
 214                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 215                     reloc->howto->name, reloc->addend, input_section->owner,
 216                     input_section, reloc->address)))
 217               abort ();
 218           }
 219         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 220         (*dst_ptr)++;
 221         (*src_ptr)++;
 222         break;
 223       }
 224     default:
 225       abort ();
 226     }
 227 }
 228
 229 #define coff_reloc16_extra_cases extra_case
 230
 231 #include "coffcode.h"
 232
 233
 234 #undef  coff_bfd_get_relocated_section_contents
 235 #undef coff_bfd_relax_section
 236 #define coff_bfd_get_relocated_section_contents \
 237   bfd_coff_reloc16_get_relocated_section_contents
 238 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 239
 240 CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL)