bfd/coff-tic30.c

   1 /* BFD back-end for TMS320C30 coff binaries.
   2    Copyright (C) 1998, 1999 Free Software Foundation, Inc.
   3    Contributed by Steven Haworth (steve@pm.cse.rmit.edu.au)
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, USA.  */
  21
  22 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "libbfd.h"
  25 #include "bfdlink.h"
  26 #include "coff/tic30.h"
  27 #include "coff/internal.h"
  28 #include "libcoff.h"
  29
  30 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
  31
  32 reloc_howto_type tic30_coff_howto_table[] =
  33 {
  34   HOWTO (R_TIC30_ABS16, 2, 1, 16, false, 0, 0, NULL,
  35          "16", false, 0x0000FFFF, 0x0000FFFF, false),
  36   HOWTO (R_TIC30_ABS24, 2, 2, 24, false, 8, complain_overflow_bitfield, NULL,
  37          "24", false, 0xFFFFFF00, 0xFFFFFF00, false),
  38   HOWTO (R_TIC30_LDP, 18, 0, 24, false, 0, complain_overflow_bitfield, NULL,
  39          "LDP", false, 0x00FF0000, 0x000000FF, false),
  40   HOWTO (R_TIC30_ABS32, 2, 2, 32, false, 0, complain_overflow_bitfield, NULL,
  41          "32", false, 0xFFFFFFFF, 0xFFFFFFFF, false),
  42   HOWTO (R_TIC30_PC16, 2, 1, 16, true, 0, complain_overflow_signed, NULL,
  43          "PCREL", false, 0x0000FFFF, 0x0000FFFF, false),
  44   EMPTY_HOWTO (-1)
  45 };
  46
  47 #ifndef coff_bfd_reloc_type_lookup
  48 #define coff_bfd_reloc_type_lookup tic30_coff_reloc_type_lookup
  49
  50 /* For the case statement use the code values used in tc_gen_reloc to
  51    map to the howto table entries that match those in both the aout
  52    and coff implementations. */
  53 reloc_howto_type *
  54 tic30_coff_reloc_type_lookup (abfd, code)
  55      bfd *abfd ATTRIBUTE_UNUSED;
  56      bfd_reloc_code_real_type code;
  57 {
  58   switch (code)
  59     {
  60     case BFD_RELOC_8:
  61     case BFD_RELOC_TIC30_LDP:
  62       return &tic30_coff_howto_table[2];
  63     case BFD_RELOC_16:
  64       return &tic30_coff_howto_table[0];
  65     case BFD_RELOC_24:
  66       return &tic30_coff_howto_table[1];
  67     case BFD_RELOC_16_PCREL:
  68       return &tic30_coff_howto_table[4];
  69     case BFD_RELOC_32:
  70       return &tic30_coff_howto_table[3];
  71     default:
  72       return (reloc_howto_type *) NULL;
  73     }
  74 }
  75
  76 #endif
  77
  78 /* Turn a howto into a reloc number */
  79
  80 static int
  81 coff_tic30_select_reloc (howto)
  82      reloc_howto_type *howto;
  83 {
  84   return howto->type;
  85 }
  86
  87 #define SELECT_RELOC(x,howto) x.r_type = coff_tic30_select_reloc(howto)
  88
  89
  90 #define BADMAG(x) TIC30BADMAG(x)
  91 #define TIC30 1                 /* Customize coffcode.h */
  92 #define __A_MAGIC_SET__
  93
  94 /* Code to swap in the reloc */
  95 #define SWAP_IN_RELOC_OFFSET  bfd_h_get_32
  96 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  97 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
  98 dst->r_stuff[1] = 'C';
  99
 100 /* Code to turn a r_type into a howto ptr, uses the above howto table. */
 101
 102 static void
 103 rtype2howto (internal, dst)
 104      arelent *internal;
 105      struct internal_reloc *dst;
 106 {
 107   switch (dst->r_type)
 108     {
 109     case R_TIC30_ABS16:
 110       internal->howto = &tic30_coff_howto_table[0];
 111       break;
 112     case R_TIC30_ABS24:
 113       internal->howto = &tic30_coff_howto_table[1];
 114       break;
 115     case R_TIC30_ABS32:
 116       internal->howto = &tic30_coff_howto_table[3];
 117       break;
 118     case R_TIC30_LDP:
 119       internal->howto = &tic30_coff_howto_table[2];
 120       break;
 121     case R_TIC30_PC16:
 122       internal->howto = &tic30_coff_howto_table[4];
 123       break;
 124     default:
 125       abort ();
 126       break;
 127     }
 128 }
 129
 130 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 131
 132 /* Perform any necessary magic to the addend in a reloc entry */
 133
 134 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 135  cache_ptr->addend =  ext_reloc.r_offset;
 136
 137
 138 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 139  reloc_processing(relent, reloc, symbols, abfd, section)
 140
 141 static void
 142 reloc_processing (relent, reloc, symbols, abfd, section)
 143      arelent *relent;
 144      struct internal_reloc *reloc;
 145      asymbol **symbols;
 146      bfd *abfd;
 147      asection *section;
 148 {
 149   relent->address = reloc->r_vaddr;
 150   rtype2howto (relent, reloc);
 151
 152   if (reloc->r_symndx > 0)
 153     {
 154       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 155     }
 156   else
 157     {
 158       relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 159     }
 160   relent->addend = reloc->r_offset;
 161   relent->address -= section->vma;
 162 }
 163
 164 #include "coffcode.h"
 165
 166 const bfd_target tic30_coff_vec =
 167 {
 168   "coff-tic30",                 /* name */
 169   bfd_target_coff_flavour,
 170   BFD_ENDIAN_BIG,               /* data byte order is big */
 171   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 172
 173   (HAS_RELOC | EXEC_P |         /* object flags */
 174    HAS_LINENO | HAS_DEBUG |
 175    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 176
 177   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 178   '_',                          /* leading symbol underscore */
 179   '/',                          /* ar_pad_char */
 180   15,                           /* ar_max_namelen */
 181   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 182   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 183   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* data */
 184   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 185   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 186   bfd_getl16, bfd_getl_signed_16, bfd_putl16,   /* hdrs */
 187
 188   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 189    bfd_generic_archive_p, _bfd_dummy_target},
 190   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 191    bfd_false},
 192   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 193    _bfd_write_archive_contents, bfd_false},
 194
 195   BFD_JUMP_TABLE_GENERIC (coff),
 196   BFD_JUMP_TABLE_COPY (coff),
 197   BFD_JUMP_TABLE_CORE (_bfd_nocore),
 198   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 199   BFD_JUMP_TABLE_SYMBOLS (coff),
 200   BFD_JUMP_TABLE_RELOCS (coff),
 201   BFD_JUMP_TABLE_WRITE (coff),
 202   BFD_JUMP_TABLE_LINK (coff),
 203   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 204
 205   NULL,
 206
 207   COFF_SWAP_TABLE
 208 };