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