bfd/coff-z8k.c

   1 /* BFD back-end for Zilog Z800n COFF binaries.
   2    Copyright 1992 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 "libbfd.h"
  25 #include "obstack.h"
  26 #include "coff/z8k.h"
  27 #include "coff/internal.h"
  28 #include "libcoff.h"
  29 #include "seclet.h"
  30
  31 extern bfd_error_vector_type bfd_error_vector;
  32
  33 /* Dummy for now */
  34 static bfd_reloc_status_type
  35 DEFUN (func_da, (abfd, reloc_entry, symbol, data, input_section, output_bfd),
  36        bfd * abfd AND
  37        arelent * reloc_entry AND
  38        struct symbol_cache_entry *symbol AND
  39        PTR data AND
  40        asection * input_section AND
  41        bfd * output_bfd)
  42 {
  43 }
  44
  45 /* Dummy for now */
  46 static bfd_reloc_status_type
  47 DEFUN (func_imm8, (abfd, reloc_entry, symbol, data, input_section, output_bfd),
  48        bfd * abfd AND
  49        arelent * reloc_entry AND
  50        struct symbol_cache_entry *symbol AND
  51        PTR data AND
  52        asection * input_section AND
  53        bfd * output_bfd)
  54 {
  55 }
  56
  57 /* Dummy for now */
  58 static bfd_reloc_status_type
  59 DEFUN (func_jr, (abfd, reloc_entry, symbol, data, input_section, output_bfd),
  60        bfd * abfd AND
  61        arelent * reloc_entry AND
  62        struct symbol_cache_entry *symbol AND
  63        PTR data AND
  64        asection * input_section AND
  65        bfd * output_bfd)
  66 {
  67 }
  68
  69
  70 static reloc_howto_type r_imm32 =
  71 HOWTO (R_IMM32, 0, 1, 32, false, 0, true,
  72        true, func_jr, "r_imm32", true, 0xffffffff, 0xffffffff, false);
  73
  74 static reloc_howto_type r_imm4l =
  75 HOWTO (R_IMM4L, 0, 1, 4, false, 0, true,
  76        true, func_jr, "r_imm4l", true, 0xf, 0xf, false);
  77
  78 static reloc_howto_type r_da =
  79 HOWTO (R_DA, 0, 1, 16, false, 0, true,
  80        true, func_da, "r_da", true, 0x0000ffff, 0x0000ffff, false);
  81
  82 static reloc_howto_type r_imm8 =
  83 HOWTO (R_IMM8, 0, 1, 8, false, 0, true,
  84        true, func_imm8, "r_imm8", true, 0x000000ff, 0x000000ff, false);
  85
  86 static reloc_howto_type r_jr =
  87 HOWTO (R_JR, 0, 1, 8, true, 0, true, true, func_jr, "r_jr", true, 0, 0, true);
  88
  89 /* Turn a howto into a reloc number */
  90
  91 static int
  92 coff_z8k_select_reloc (howto)
  93      reloc_howto_type *howto;
  94 {
  95   return howto->type;
  96 }
  97
  98 #define SELECT_RELOC(x,howto) x= coff_z8k_select_reloc(howto)
  99
 100
 101 #define BADMAG(x) Z8KBADMAG(x)
 102 #define Z8K 1                   /* Customize coffcode.h */
 103 #define __A_MAGIC_SET__
 104
 105
 106
 107 /* Code to swap in the reloc */
 108 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
 109 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
 110 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
 111   dst->r_stuff[0] = 'S'; \
 112   dst->r_stuff[1] = 'C';
 113
 114 /* Code to turn a r_type into a howto ptr, uses the above howto table
 115    */
 116
 117 static void
 118 DEFUN (rtype2howto, (internal, dst),
 119        arelent * internal AND
 120        struct internal_reloc *dst)
 121 {
 122   switch (dst->r_type)
 123     {
 124       default:
 125       printf ("BAD %x\n", dst->r_type);
 126     case R_IMM8:
 127       internal->howto = &r_imm8;
 128       break;
 129     case R_DA:
 130       internal->howto = &r_da;
 131       break;
 132     case R_JR:
 133       internal->howto = &r_jr;
 134       break;
 135     case R_IMM32:
 136       internal->howto = &r_imm32;
 137       break;
 138     case R_IMM4L:
 139       internal->howto = &r_imm4l;
 140       break;
 141     }
 142 }
 143
 144 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 145
 146
 147 /* Perform any necessaru magic to the addend in a reloc entry */
 148
 149
 150 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 151  cache_ptr->addend =  ext_reloc.r_offset;
 152
 153
 154 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 155  reloc_processing(relent, reloc, symbols, abfd, section)
 156
 157 static void
 158 DEFUN (reloc_processing, (relent, reloc, symbols, abfd, section),
 159        arelent * relent AND
 160        struct internal_reloc *reloc AND
 161        asymbol ** symbols AND
 162        bfd * abfd AND
 163        asection * section)
 164 {
 165   relent->address = reloc->r_vaddr;
 166   rtype2howto (relent, reloc);
 167
 168   if (reloc->r_symndx > 0)
 169     {
 170       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 171     }
 172   else
 173     {
 174       relent->sym_ptr_ptr = &(bfd_abs_symbol);
 175     }
 176
 177
 178   relent->addend = reloc->r_offset;
 179   relent->address -= section->vma;
 180 }
 181
 182 static void
 183 extra_case (in_abfd, seclet, reloc, data, src_ptr, dst_ptr)
 184      bfd *in_abfd;
 185      bfd_seclet_type *seclet;
 186      arelent *reloc;
 187      bfd_byte *data;
 188      unsigned int *src_ptr;
 189      unsigned int *dst_ptr;
 190 {
 191   switch (reloc->howto->type)
 192     {
 193     case R_IMM8:
 194       bfd_put_8 (in_abfd, bfd_coff_reloc16_get_value (reloc, seclet),
 195                  data + *dst_ptr);
 196       (*dst_ptr) += 1;
 197       (*src_ptr) += 1;
 198       break;
 199
 200     case R_IMM32:
 201       bfd_put_32 (in_abfd, bfd_coff_reloc16_get_value (reloc, seclet),
 202                   data + *dst_ptr);
 203       (*dst_ptr) += 4;
 204       (*src_ptr) += 4;
 205       break;
 206
 207     case R_IMM4L:
 208       bfd_put_8 (in_abfd,
 209                  (bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
 210                  | (0x0f & bfd_coff_reloc16_get_value (reloc, seclet)),
 211                  data + *dst_ptr);
 212       (*dst_ptr) += 1;
 213       (*src_ptr) += 1;
 214       break;
 215
 216     case R_DA:
 217       bfd_put_16 (in_abfd, bfd_coff_reloc16_get_value (reloc, seclet),
 218                   data + *dst_ptr);
 219       (*dst_ptr) += 2;
 220       (*src_ptr) += 2;
 221       break;
 222
 223     case R_JR:
 224       {
 225         bfd_vma dst = bfd_coff_reloc16_get_value (reloc, seclet);
 226         bfd_vma dot = seclet->offset
 227         + *dst_ptr
 228         + seclet->u.indirect.section->output_section->vma;
 229         int gap = dst - dot - 1;/* -1 since were in the odd byte of the
 230                                     word and the pc's been incremented */
 231
 232         if (gap & 1)
 233           abort ();
 234         gap /= 2;
 235         if (gap > 128 || gap < -128)
 236           {
 237             bfd_error_vector.reloc_value_truncated (reloc, seclet);
 238           }
 239         bfd_put_8 (in_abfd, gap, data + *dst_ptr);
 240         (*dst_ptr)++;
 241         (*src_ptr)++;
 242         break;
 243       }
 244     default:
 245       abort ();
 246     }
 247 }
 248
 249 #define coff_reloc16_extra_cases extra_case
 250
 251 #include "coffcode.h"
 252
 253
 254 #undef  coff_bfd_get_relocated_section_contents
 255 #undef coff_bfd_relax_section
 256 #define  coff_bfd_get_relocated_section_contents bfd_coff_reloc16_get_relocated_section_contents
 257 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
 258
 259 bfd_target z8kcoff_vec =
 260 {
 261   "coff-z8k",                   /* name */
 262   bfd_target_coff_flavour,
 263   true,                         /* data byte order is big */
 264   true,                         /* header byte order is big */
 265
 266   (HAS_RELOC | EXEC_P |         /* object flags */
 267    HAS_LINENO | HAS_DEBUG |
 268    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
 269
 270   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),        /* section flags */
 271   '_',                          /* leading symbol underscore */
 272   '/',                          /* ar_pad_char */
 273   15,                           /* ar_max_namelen */
 274   1,                            /* minimum section alignment */
 275   _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16,       /* data */
 276   _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16,       /* hdrs */
 277
 278   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 279    bfd_generic_archive_p, _bfd_dummy_target},
 280   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 281    bfd_false},
 282   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 283    _bfd_write_archive_contents, bfd_false},
 284
 285   JUMP_TABLE (coff),
 286   0, 0,
 287   COFF_SWAP_TABLE,
 288 };