bfd/coff-tic30.c

   1 /* BFD back-end for TMS320C30 coff binaries.
   2    Copyright 1998, 1999, 2000, 2001, 2002 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., 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, 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 static int  coff_tic30_select_reloc PARAMS ((reloc_howto_type *));
  31 static void rtype2howto PARAMS ((arelent *, struct internal_reloc *));
  32 static void reloc_processing PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *));
  33
  34 reloc_howto_type * tic30_coff_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
  35
  36 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
  37
  38 reloc_howto_type tic30_coff_howto_table[] =
  39   {
  40     HOWTO (R_TIC30_ABS16, 2, 1, 16, FALSE, 0, 0, NULL,
  41            "16", FALSE, 0x0000FFFF, 0x0000FFFF, FALSE),
  42     HOWTO (R_TIC30_ABS24, 2, 2, 24, FALSE, 8, complain_overflow_bitfield, NULL,
  43            "24", FALSE, 0xFFFFFF00, 0xFFFFFF00, FALSE),
  44     HOWTO (R_TIC30_LDP, 18, 0, 24, FALSE, 0, complain_overflow_bitfield, NULL,
  45            "LDP", FALSE, 0x00FF0000, 0x000000FF, FALSE),
  46     HOWTO (R_TIC30_ABS32, 2, 2, 32, FALSE, 0, complain_overflow_bitfield, NULL,
  47            "32", FALSE, 0xFFFFFFFF, 0xFFFFFFFF, FALSE),
  48     HOWTO (R_TIC30_PC16, 2, 1, 16, TRUE, 0, complain_overflow_signed, NULL,
  49            "PCREL", FALSE, 0x0000FFFF, 0x0000FFFF, FALSE),
  50     EMPTY_HOWTO (-1)
  51   };
  52
  53 #ifndef coff_bfd_reloc_type_lookup
  54 #define coff_bfd_reloc_type_lookup tic30_coff_reloc_type_lookup
  55
  56 /* For the case statement use the code values used in tc_gen_reloc to
  57    map to the howto table entries that match those in both the aout
  58    and coff implementations.  */
  59
  60 reloc_howto_type *
  61 tic30_coff_reloc_type_lookup (abfd, code)
  62      bfd *abfd ATTRIBUTE_UNUSED;
  63      bfd_reloc_code_real_type code;
  64 {
  65   switch (code)
  66     {
  67     case BFD_RELOC_8:
  68     case BFD_RELOC_TIC30_LDP:
  69       return &tic30_coff_howto_table[2];
  70     case BFD_RELOC_16:
  71       return &tic30_coff_howto_table[0];
  72     case BFD_RELOC_24:
  73       return &tic30_coff_howto_table[1];
  74     case BFD_RELOC_16_PCREL:
  75       return &tic30_coff_howto_table[4];
  76     case BFD_RELOC_32:
  77       return &tic30_coff_howto_table[3];
  78     default:
  79       return (reloc_howto_type *) NULL;
  80     }
  81 }
  82
  83 #endif
  84
  85 /* Turn a howto into a reloc number.  */
  86
  87 static int
  88 coff_tic30_select_reloc (howto)
  89      reloc_howto_type *howto;
  90 {
  91   return howto->type;
  92 }
  93
  94 #define SELECT_RELOC(x,howto) x.r_type = coff_tic30_select_reloc(howto)
  95
  96 #define BADMAG(x) TIC30BADMAG(x)
  97 #define TIC30 1                 /* Customize coffcode.h */
  98 #define __A_MAGIC_SET__
  99
 100 /* Code to swap in the reloc */
 101 #define SWAP_IN_RELOC_OFFSET  H_GET_32
 102 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
 103 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
 104 dst->r_stuff[1] = 'C';
 105
 106 /* Code to turn a r_type into a howto ptr, uses the above howto table.  */
 107
 108 static void
 109 rtype2howto (internal, dst)
 110      arelent *internal;
 111      struct internal_reloc *dst;
 112 {
 113   switch (dst->r_type)
 114     {
 115     case R_TIC30_ABS16:
 116       internal->howto = &tic30_coff_howto_table[0];
 117       break;
 118     case R_TIC30_ABS24:
 119       internal->howto = &tic30_coff_howto_table[1];
 120       break;
 121     case R_TIC30_ABS32:
 122       internal->howto = &tic30_coff_howto_table[3];
 123       break;
 124     case R_TIC30_LDP:
 125       internal->howto = &tic30_coff_howto_table[2];
 126       break;
 127     case R_TIC30_PC16:
 128       internal->howto = &tic30_coff_howto_table[4];
 129       break;
 130     default:
 131       abort ();
 132       break;
 133     }
 134 }
 135
 136 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
 137
 138 /* Perform any necessary magic to the addend in a reloc entry */
 139
 140 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 141  cache_ptr->addend =  ext_reloc.r_offset;
 142
 143 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 144  reloc_processing(relent, reloc, symbols, abfd, section)
 145
 146 static void
 147 reloc_processing (relent, reloc, symbols, abfd, section)
 148      arelent *relent;
 149      struct internal_reloc *reloc;
 150      asymbol **symbols;
 151      bfd *abfd;
 152      asection *section;
 153 {
 154   relent->address = reloc->r_vaddr;
 155   rtype2howto (relent, reloc);
 156
 157   if (reloc->r_symndx > 0)
 158     relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 159   else
 160     relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 161
 162   relent->addend = reloc->r_offset;
 163   relent->address -= section->vma;
 164 }
 165
 166 #include "coffcode.h"
 167
 168 const bfd_target tic30_coff_vec =
 169 {
 170   "coff-tic30",                 /* name */
 171   bfd_target_coff_flavour,
 172   BFD_ENDIAN_BIG,               /* data byte order is big */
 173   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 174
 175   (HAS_RELOC | EXEC_P |         /* object flags */
 176    HAS_LINENO | HAS_DEBUG |
 177    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 178
 179   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 180   '_',                          /* leading symbol underscore */
 181   '/',                          /* ar_pad_char */
 182   15,                           /* ar_max_namelen */
 183   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 184   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 185   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* data */
 186   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 187   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 188   bfd_getl16, bfd_getl_signed_16, bfd_putl16,   /* hdrs */
 189
 190   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 191    bfd_generic_archive_p, _bfd_dummy_target},
 192   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 193    bfd_false},
 194   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 195    _bfd_write_archive_contents, bfd_false},
 196
 197   BFD_JUMP_TABLE_GENERIC (coff),
 198   BFD_JUMP_TABLE_COPY (coff),
 199   BFD_JUMP_TABLE_CORE (_bfd_nocore),
 200   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 201   BFD_JUMP_TABLE_SYMBOLS (coff),
 202   BFD_JUMP_TABLE_RELOCS (coff),
 203   BFD_JUMP_TABLE_WRITE (coff),
 204   BFD_JUMP_TABLE_LINK (coff),
 205   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 206
 207   NULL,
 208
 209   COFF_SWAP_TABLE
 210 };