bfd/coff-z8k.c

   1 /* Zilog Z800n COFF back-end for BFD.
   2    Copyright (C) 1992 Free Software Foundation, Inc.
   3    Written by Steve Chamberlain
   4    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
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libbfd.h"
  26 #include "obstack.h"
  27 #include "coff/z8k.h"
  28 #include "coff/internal.h"
  29 #include "libcoff.h"
  30 #include "seclet.h"
  31 extern bfd_error_vector_type bfd_error_vector;
  32 func_da() {}
  33 func_jr() {}
  34
  35 static reloc_howto_type r_da =
  36   HOWTO(R_DA , 0,  1,   16, false, 0, true,
  37 true,func_da,"r_da",    true, 0x0000ffff,0x0000ffff, false);
  38
  39 static reloc_howto_type r_jr =
  40  HOWTO(R_JR, 0,1,8,true,0,true,true,func_jr,"r_jr", true,0,0,true);
  41
  42
  43
  44
  45
  46 /* Turn a howto into a reloc number */
  47
  48 static int coff_z8k_select_reloc(howto)
  49 reloc_howto_type *howto;
  50 {
  51 return howto->type;
  52 }
  53 #define SELECT_RELOC(x,howto) x= coff_z8k_select_reloc(howto)
  54
  55
  56 #define BADMAG(x) Z8KBADMAG(x)
  57 #define Z8K 1           /* Customize coffcode.h */
  58 #define __A_MAGIC_SET__
  59
  60
  61
  62 /* Code to swap in the reloc */
  63 #define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
  64 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  65 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
  66   dst->r_stuff[0] = 'S'; \
  67   dst->r_stuff[1] = 'C';
  68
  69 /* Code to turn a r_type into a howto ptr, uses the above howto table
  70    */
  71
  72 static void
  73 DEFUN(rtype2howto,(internal, dst),
  74 arelent *internal AND
  75 struct internal_reloc *dst)
  76 {
  77   switch (dst->r_type) {
  78    default:
  79     printf("BAD %x\n", dst->r_type);
  80    case R_DA:
  81     internal->howto = &r_da;
  82     break;
  83    case R_JR:
  84     internal->howto = &r_jr;
  85     }
  86 }
  87
  88 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
  89
  90
  91 /* Perform any necessaru magic to the addend in a reloc entry */
  92
  93
  94 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
  95  cache_ptr->addend =  ext_reloc.r_offset;
  96
  97
  98 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
  99  reloc_processing(relent, reloc, symbols, abfd, section)
 100
 101 static void DEFUN(reloc_processing,(relent,reloc, symbols, abfd, section) ,
 102            arelent *relent AND
 103            struct internal_reloc *reloc AND
 104            asymbol **symbols AND
 105            bfd *abfd AND
 106            asection *section)
 107 {
 108   relent->address = reloc->r_vaddr;
 109   rtype2howto(relent,reloc);
 110
 111   if (reloc->r_symndx > 0)
 112   {
 113
 114     relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx];
 115
 116   }
 117   else
 118   {
 119     relent->sym_ptr_ptr = &(bfd_abs_symbol);
 120   }
 121
 122
 123
 124   relent->addend = reloc->r_offset;
 125
 126   relent->address-= section->vma;
 127 /*  relent->section = 0;*/
 128 }
 129
 130 static bfd_vma get_value();
 131 static
 132 extra_case(in_abfd, seclet, reloc, data, src_ptr, dst_ptr)
 133 bfd *in_abfd;
 134 bfd_seclet_type *seclet;
 135 arelent *reloc;
 136 bfd_byte *data;
 137 unsigned int *src_ptr;
 138 unsigned int *dst_ptr;
 139 {
 140   switch (reloc->howto->type)
 141   {
 142    case R_DA:
 143     bfd_put_16(in_abfd, get_value(reloc, seclet), data+*dst_ptr);
 144     (*dst_ptr)+=2;
 145     ( *src_ptr)+=2;
 146     break;
 147    case R_JR:
 148    {
 149      bfd_vma dst = get_value(reloc,seclet);
 150      bfd_vma dot = seclet->offset
 151       + *dst_ptr
 152        + seclet->u.indirect.section->output_section->vma;
 153      int gap = dst - dot - 1 ; /* -1 since were in the odd byte of the
 154                                   word */
 155      if (gap & 1)
 156       abort();
 157      gap/=2;
 158      if (gap > 128 || gap< -128)
 159      {
 160        bfd_error_vector.reloc_value_truncated(reloc, seclet);
 161      }
 162      bfd_put_8(in_abfd, gap, data+*dst_ptr);
 163      (*dst_ptr)++;
 164      (*src_ptr)++;
 165      break;
 166    }
 167    default:
 168     abort();
 169   }
 170 }
 171 #define EXTRA_CASES default: extra_case(in_abfd,seclet,reloc, data, &src_address, &dst_address);
 172
 173
 174
 175
 176 #include "coffcode.h"
 177
 178
 179 #undef  coff_bfd_get_relocated_section_contents
 180 #undef coff_bfd_relax_section
 181 #define  coff_bfd_get_relocated_section_contents bfd_coff_get_relocated_section_contents
 182 #define coff_bfd_relax_section bfd_coff_relax_section
 183
 184 bfd_target z8kcoff_vec =
 185 {
 186   "coff-z8k",           /* name */
 187   bfd_target_coff_flavour,
 188   true,                         /* data byte order is big */
 189   true,                         /* header byte order is big */
 190
 191   (HAS_RELOC | EXEC_P |         /* object flags */
 192    HAS_LINENO | HAS_DEBUG |
 193    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
 194
 195   ( SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 196   '/',                          /* ar_pad_char */
 197   15,                           /* ar_max_namelen */
 198   1,                            /* minimum section alignment */
 199 _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
 200 _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
 201
 202   {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
 203      bfd_generic_archive_p, _bfd_dummy_target},
 204   {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 205      bfd_false},
 206   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 207      _bfd_write_archive_contents, bfd_false},
 208
 209      JUMP_TABLE(coff),
 210     COFF_SWAP_TABLE
 211 };