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 #define BADMAG(x) TIC30BADMAG(x)
  90 #define TIC30 1                 /* Customize coffcode.h */
  91 #define __A_MAGIC_SET__
  92
  93 /* Code to swap in the reloc */
  94 #define SWAP_IN_RELOC_OFFSET  bfd_h_get_32
  95 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
  96 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
  97 dst->r_stuff[1] = 'C';
  98
  99 /* Code to turn a r_type into a howto ptr, uses the above howto table.  */
 100
 101 static void
 102 rtype2howto (internal, dst)
 103      arelent *internal;
 104      struct internal_reloc *dst;
 105 {
 106   switch (dst->r_type)
 107     {
 108     case R_TIC30_ABS16:
 109       internal->howto = &tic30_coff_howto_table[0];
 110       break;
 111     case R_TIC30_ABS24:
 112       internal->howto = &tic30_coff_howto_table[1];
 113       break;
 114     case R_TIC30_ABS32:
 115       internal->howto = &tic30_coff_howto_table[3];
 116       break;
 117     case R_TIC30_LDP:
 118       internal->howto = &tic30_coff_howto_table[2];
 119       break;
 120     case R_TIC30_PC16:
 121       internal->howto = &tic30_coff_howto_table[4];
 122       break;
 123     default:
 124       abort ();
 125       break;
 126     }
 127 }
 128
 129 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 130
 131 /* Perform any necessary magic to the addend in a reloc entry */
 132
 133 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 134  cache_ptr->addend =  ext_reloc.r_offset;
 135
 136 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 137  reloc_processing(relent, reloc, symbols, abfd, section)
 138
 139 static void
 140 reloc_processing (relent, reloc, symbols, abfd, section)
 141      arelent *relent;
 142      struct internal_reloc *reloc;
 143      asymbol **symbols;
 144      bfd *abfd;
 145      asection *section;
 146 {
 147   relent->address = reloc->r_vaddr;
 148   rtype2howto (relent, reloc);
 149
 150   if (reloc->r_symndx > 0)
 151     {
 152       relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 153     }
 154   else
 155     {
 156       relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 157     }
 158   relent->addend = reloc->r_offset;
 159   relent->address -= section->vma;
 160 }
 161
 162 #include "coffcode.h"
 163
 164 const bfd_target tic30_coff_vec =
 165 {
 166   "coff-tic30",                 /* name */
 167   bfd_target_coff_flavour,
 168   BFD_ENDIAN_BIG,               /* data byte order is big */
 169   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 170
 171   (HAS_RELOC | EXEC_P |         /* object flags */
 172    HAS_LINENO | HAS_DEBUG |
 173    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 174
 175   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 176   '_',                          /* leading symbol underscore */
 177   '/',                          /* ar_pad_char */
 178   15,                           /* ar_max_namelen */
 179   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 180   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 181   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* data */
 182   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 183   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 184   bfd_getl16, bfd_getl_signed_16, bfd_putl16,   /* hdrs */
 185
 186   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 187    bfd_generic_archive_p, _bfd_dummy_target},
 188   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 189    bfd_false},
 190   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 191    _bfd_write_archive_contents, bfd_false},
 192
 193   BFD_JUMP_TABLE_GENERIC (coff),
 194   BFD_JUMP_TABLE_COPY (coff),
 195   BFD_JUMP_TABLE_CORE (_bfd_nocore),
 196   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 197   BFD_JUMP_TABLE_SYMBOLS (coff),
 198   BFD_JUMP_TABLE_RELOCS (coff),
 199   BFD_JUMP_TABLE_WRITE (coff),
 200   BFD_JUMP_TABLE_LINK (coff),
 201   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 202
 203   NULL,
 204
 205   COFF_SWAP_TABLE
 206 };