bfd/coff-tic30.c

   1 /* BFD back-end for TMS320C30 coff binaries.
   2    Copyright 1998, 1999, 2000, 2001, 2002, 2007
   3    Free Software Foundation, Inc.
   4    Contributed by Steven Haworth (steve@pm.cse.rmit.edu.au)
   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 3 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., 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "libbfd.h"
  26 #include "bfdlink.h"
  27 #include "coff/tic30.h"
  28 #include "coff/internal.h"
  29 #include "libcoff.h"
  30
  31 static int  coff_tic30_select_reloc PARAMS ((reloc_howto_type *));
  32 static void rtype2howto PARAMS ((arelent *, struct internal_reloc *));
  33 static void reloc_processing PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *));
  34
  35 reloc_howto_type * tic30_coff_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
  36
  37 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
  38
  39 reloc_howto_type tic30_coff_howto_table[] =
  40   {
  41     HOWTO (R_TIC30_ABS16, 2, 1, 16, FALSE, 0, 0, NULL,
  42            "16", FALSE, 0x0000FFFF, 0x0000FFFF, FALSE),
  43     HOWTO (R_TIC30_ABS24, 2, 2, 24, FALSE, 8, complain_overflow_bitfield, NULL,
  44            "24", FALSE, 0xFFFFFF00, 0xFFFFFF00, FALSE),
  45     HOWTO (R_TIC30_LDP, 18, 0, 24, FALSE, 0, complain_overflow_bitfield, NULL,
  46            "LDP", FALSE, 0x00FF0000, 0x000000FF, FALSE),
  47     HOWTO (R_TIC30_ABS32, 2, 2, 32, FALSE, 0, complain_overflow_bitfield, NULL,
  48            "32", FALSE, 0xFFFFFFFF, 0xFFFFFFFF, FALSE),
  49     HOWTO (R_TIC30_PC16, 2, 1, 16, TRUE, 0, complain_overflow_signed, NULL,
  50            "PCREL", FALSE, 0x0000FFFF, 0x0000FFFF, FALSE),
  51     EMPTY_HOWTO (-1)
  52   };
  53
  54 #ifndef coff_bfd_reloc_type_lookup
  55 #define coff_bfd_reloc_type_lookup tic30_coff_reloc_type_lookup
  56 #define coff_bfd_reloc_name_lookup tic30_coff_reloc_name_lookup
  57
  58 /* For the case statement use the code values used in tc_gen_reloc to
  59    map to the howto table entries that match those in both the aout
  60    and coff implementations.  */
  61
  62 reloc_howto_type *
  63 tic30_coff_reloc_type_lookup (abfd, code)
  64      bfd *abfd ATTRIBUTE_UNUSED;
  65      bfd_reloc_code_real_type code;
  66 {
  67   switch (code)
  68     {
  69     case BFD_RELOC_8:
  70     case BFD_RELOC_TIC30_LDP:
  71       return &tic30_coff_howto_table[2];
  72     case BFD_RELOC_16:
  73       return &tic30_coff_howto_table[0];
  74     case BFD_RELOC_24:
  75       return &tic30_coff_howto_table[1];
  76     case BFD_RELOC_16_PCREL:
  77       return &tic30_coff_howto_table[4];
  78     case BFD_RELOC_32:
  79       return &tic30_coff_howto_table[3];
  80     default:
  81       return (reloc_howto_type *) NULL;
  82     }
  83 }
  84
  85 static reloc_howto_type *
  86 tic30_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
  87                               const char *r_name)
  88 {
  89   unsigned int i;
  90
  91   for (i = 0;
  92        i < (sizeof (tic30_coff_howto_table)
  93             / sizeof (tic30_coff_howto_table[0]));
  94        i++)
  95     if (tic30_coff_howto_table[i].name != NULL
  96         && strcasecmp (tic30_coff_howto_table[i].name, r_name) == 0)
  97       return &tic30_coff_howto_table[i];
  98
  99   return NULL;
 100 }
 101
 102 #endif
 103
 104 /* Turn a howto into a reloc number.  */
 105
 106 static int
 107 coff_tic30_select_reloc (howto)
 108      reloc_howto_type *howto;
 109 {
 110   return howto->type;
 111 }
 112
 113 #define SELECT_RELOC(x,howto) x.r_type = coff_tic30_select_reloc(howto)
 114
 115 #define BADMAG(x) TIC30BADMAG(x)
 116 #define TIC30 1                 /* Customize coffcode.h */
 117 #define __A_MAGIC_SET__
 118
 119 /* Code to swap in the reloc */
 120 #define SWAP_IN_RELOC_OFFSET  H_GET_32
 121 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
 122 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
 123 dst->r_stuff[1] = 'C';
 124
 125 /* Code to turn a r_type into a howto ptr, uses the above howto table.  */
 126
 127 static void
 128 rtype2howto (internal, dst)
 129      arelent *internal;
 130      struct internal_reloc *dst;
 131 {
 132   switch (dst->r_type)
 133     {
 134     case R_TIC30_ABS16:
 135       internal->howto = &tic30_coff_howto_table[0];
 136       break;
 137     case R_TIC30_ABS24:
 138       internal->howto = &tic30_coff_howto_table[1];
 139       break;
 140     case R_TIC30_ABS32:
 141       internal->howto = &tic30_coff_howto_table[3];
 142       break;
 143     case R_TIC30_LDP:
 144       internal->howto = &tic30_coff_howto_table[2];
 145       break;
 146     case R_TIC30_PC16:
 147       internal->howto = &tic30_coff_howto_table[4];
 148       break;
 149     default:
 150       abort ();
 151       break;
 152     }
 153 }
 154
 155 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
 156
 157 /* Perform any necessary magic to the addend in a reloc entry */
 158
 159 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 160  cache_ptr->addend =  ext_reloc.r_offset;
 161
 162 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 163  reloc_processing(relent, reloc, symbols, abfd, section)
 164
 165 static void
 166 reloc_processing (relent, reloc, symbols, abfd, section)
 167      arelent *relent;
 168      struct internal_reloc *reloc;
 169      asymbol **symbols;
 170      bfd *abfd;
 171      asection *section;
 172 {
 173   relent->address = reloc->r_vaddr;
 174   rtype2howto (relent, reloc);
 175
 176   if (reloc->r_symndx > 0)
 177     relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 178   else
 179     relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 180
 181   relent->addend = reloc->r_offset;
 182   relent->address -= section->vma;
 183 }
 184
 185 #include "coffcode.h"
 186
 187 const bfd_target tic30_coff_vec =
 188 {
 189   "coff-tic30",                 /* name */
 190   bfd_target_coff_flavour,
 191   BFD_ENDIAN_BIG,               /* data byte order is big */
 192   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 193
 194   (HAS_RELOC | EXEC_P |         /* object flags */
 195    HAS_LINENO | HAS_DEBUG |
 196    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 197
 198   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 199   '_',                          /* leading symbol underscore */
 200   '/',                          /* ar_pad_char */
 201   15,                           /* ar_max_namelen */
 202   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 203   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 204   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* data */
 205   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 206   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 207   bfd_getl16, bfd_getl_signed_16, bfd_putl16,   /* hdrs */
 208
 209   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 210    bfd_generic_archive_p, _bfd_dummy_target},
 211   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 212    bfd_false},
 213   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 214    _bfd_write_archive_contents, bfd_false},
 215
 216   BFD_JUMP_TABLE_GENERIC (coff),
 217   BFD_JUMP_TABLE_COPY (coff),
 218   BFD_JUMP_TABLE_CORE (_bfd_nocore),
 219   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 220   BFD_JUMP_TABLE_SYMBOLS (coff),
 221   BFD_JUMP_TABLE_RELOCS (coff),
 222   BFD_JUMP_TABLE_WRITE (coff),
 223   BFD_JUMP_TABLE_LINK (coff),
 224   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 225
 226   NULL,
 227
 228   COFF_SWAP_TABLE
 229 };