bfd/coff-z8k.c

   1 /* BFD back-end for Zilog Z800n COFF binaries.
   2    Copyright 1992, 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/z8k.h"
  28 #include "coff/internal.h"
  29 #include "libcoff.h"
  30
  31 static reloc_howto_type r_imm32 =
  32 HOWTO (R_IMM32, 0, 1, 32, false, 0,
  33        complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff,
  34        0xffffffff, false);
  35
  36 static reloc_howto_type r_imm4l =
  37 HOWTO (R_IMM4L, 0, 1, 4, false, 0,
  38        complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false);
  39
  40 static reloc_howto_type r_da =
  41 HOWTO (R_IMM16, 0, 1, 16, false, 0,
  42        complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff,
  43        false);
  44
  45 static reloc_howto_type r_imm8 =
  46 HOWTO (R_IMM8, 0, 1, 8, false, 0,
  47        complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff,
  48        false);
  49
  50 static reloc_howto_type r_jr =
  51 HOWTO (R_JR, 0, 1, 8, true, 0, complain_overflow_signed, 0,
  52        "r_jr", true, 0, 0, true);
  53
  54 /* Turn a howto into a reloc number */
  55
  56 static int
  57 coff_z8k_select_reloc (howto)
  58      reloc_howto_type *howto;
  59 {
  60   return howto->type;
  61 }
  62
  63 #define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)
  64
  65
  66 #define BADMAG(x) Z8KBADMAG(x)
  67 #define Z8K 1                   /* Customize coffcode.h */
  68 #define __A_MAGIC_SET__
  69
  70
  71
  72 /* Code to swap in the reloc */
  73 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  74 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  75 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  76   dst->r_stuff[0] = 'S'; \
  77   dst->r_stuff[1] = 'C';
  78
  79 /* Code to turn a r_type into a howto ptr, uses the above howto table
  80    */
  81
  82 static void
  83 rtype2howto (internal, dst)
  84      arelent * internal;
  85      struct internal_reloc *dst;
  86 {
  87   switch (dst->r_type)
  88     {
  89       default:
  90       fprintf (stderr, "BAD 0x%x\n", dst->r_type);
  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
 112 /* Perform any necessaru magic to the addend in a reloc entry */
 113
 114
 115 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 116  cache_ptr->addend =  ext_reloc.r_offset;
 117
 118
 119 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 120  reloc_processing(relent, reloc, symbols, abfd, section)
 121
 122 static void
 123 reloc_processing (relent, reloc, symbols, abfd, section)
 124      arelent * relent;
 125      struct internal_reloc *reloc;
 126      asymbol ** symbols;
 127      bfd * abfd;
 128      asection * section;
 129 {
 130   relent->address = reloc->r_vaddr;
 131   rtype2howto (relent, reloc);
 132
 133   if (reloc->r_symndx > 0)
 134     {
 135       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 136     }
 137   else
 138     {
 139       relent->sym_ptr_ptr = &(bfd_abs_symbol);
 140     }
 141
 142
 143   relent->addend = reloc->r_offset;
 144   relent->address -= section->vma;
 145 }
 146
 147 static void
 148 extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
 149      bfd *in_abfd;
 150      struct bfd_link_info *link_info;
 151      struct bfd_link_order *link_order;
 152      arelent *reloc;
 153      bfd_byte *data;
 154      unsigned int *src_ptr;
 155      unsigned int *dst_ptr;
 156 {
 157   asection *input_section = link_order->u.indirect.section;
 158
 159   switch (reloc->howto->type)
 160     {
 161     case R_IMM8:
 162       bfd_put_8 (in_abfd,
 163                  bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 164                  data + *dst_ptr);
 165       (*dst_ptr) += 1;
 166       (*src_ptr) += 1;
 167       break;
 168
 169     case R_IMM32:
 170       bfd_put_32 (in_abfd,
 171                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 172                   data + *dst_ptr);
 173       (*dst_ptr) += 4;
 174       (*src_ptr) += 4;
 175       break;
 176
 177     case R_IMM4L:
 178       bfd_put_8 (in_abfd,
 179                  ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
 180                   | (0x0f
 181                      & bfd_coff_reloc16_get_value (reloc, link_info,
 182                                                    input_section))),
 183                  data + *dst_ptr);
 184       (*dst_ptr) += 1;
 185       (*src_ptr) += 1;
 186       break;
 187
 188     case R_IMM16:
 189       bfd_put_16 (in_abfd,
 190                   bfd_coff_reloc16_get_value (reloc, link_info, input_section),
 191                   data + *dst_ptr);
 192       (*dst_ptr) += 2;
 193       (*src_ptr) += 2;
 194       break;
 195
 196     case R_JR:
 197       {
 198         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
 199                                                   input_section);
 200         bfd_vma dot = (link_order->offset
 201                        + *dst_ptr
 202                        + input_section->output_section->vma);
 203         int gap = dst - dot - 1;/* -1 since were in the odd byte of the
 204                                     word and the pc's been incremented */
 205
 206         if (gap & 1)
 207           abort ();
 208         gap /= 2;
 209         if (gap > 128 || gap < -128)
 210           {
 211             if (! ((*link_info->callbacks->reloc_overflow)
 212                    (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
 213                     reloc->howto->name, reloc->addend, input_section->owner,
 214                     input_section, reloc->address)))
 215               abort ();
 216           }
 217         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 218         (*dst_ptr)++;
 219         (*src_ptr)++;
 220         break;
 221       }
 222     default:
 223       abort ();
 224     }
 225 }
 226
 227 #define coff_reloc16_extra_cases extra_case
 228
 229 #include "coffcode.h"
 230
 231
 232 #undef  coff_bfd_get_relocated_section_contents
 233 #undef coff_bfd_relax_section
 234 #define coff_bfd_get_relocated_section_contents \
 235   bfd_coff_reloc16_get_relocated_section_contents
 236 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 237
 238 const bfd_target z8kcoff_vec =
 239 {
 240   "coff-z8k",                   /* name */
 241   bfd_target_coff_flavour,
 242   true,                         /* data byte order is big */
 243   true,                         /* header byte order is big */
 244
 245   (HAS_RELOC | EXEC_P |         /* object flags */
 246    HAS_LINENO | HAS_DEBUG |
 247    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 248
 249   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),        /* section flags */
 250   '_',                          /* leading symbol underscore */
 251   '/',                          /* ar_pad_char */
 252   15,                           /* ar_max_namelen */
 253   1,                            /* minimum section alignment */
 254   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 255      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 256      bfd_getb16, bfd_getb_signed_16, bfd_putb16,        /* data */
 257   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 258      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 259      bfd_getb16, bfd_getb_signed_16, bfd_putb16,        /* hdrs */
 260
 261   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 262    bfd_generic_archive_p, _bfd_dummy_target},
 263   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 264    bfd_false},
 265   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 266    _bfd_write_archive_contents, bfd_false},
 267
 268      BFD_JUMP_TABLE_GENERIC (coff),
 269      BFD_JUMP_TABLE_COPY (coff),
 270      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 271      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 272      BFD_JUMP_TABLE_SYMBOLS (coff),
 273      BFD_JUMP_TABLE_RELOCS (coff),
 274      BFD_JUMP_TABLE_WRITE (coff),
 275      BFD_JUMP_TABLE_LINK (coff),
 276      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 277
 278   COFF_SWAP_TABLE,
 279 };