bfd/coff-tic30.c

   1 /* BFD back-end for TMS320C30 coff binaries.
   2    Copyright 1998, 1999, 2000, 2001, 2002, 2005, 2007, 2008, 2011, 2012
   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 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
  32
  33 reloc_howto_type tic30_coff_howto_table[] =
  34   {
  35     HOWTO (R_TIC30_ABS16, 2, 1, 16, FALSE, 0, 0, NULL,
  36            "16", FALSE, 0x0000FFFF, 0x0000FFFF, FALSE),
  37     HOWTO (R_TIC30_ABS24, 2, 2, 24, FALSE, 8, complain_overflow_bitfield, NULL,
  38            "24", FALSE, 0xFFFFFF00, 0xFFFFFF00, FALSE),
  39     HOWTO (R_TIC30_LDP, 18, 0, 24, FALSE, 0, complain_overflow_bitfield, NULL,
  40            "LDP", FALSE, 0x00FF0000, 0x000000FF, FALSE),
  41     HOWTO (R_TIC30_ABS32, 2, 2, 32, FALSE, 0, complain_overflow_bitfield, NULL,
  42            "32", FALSE, 0xFFFFFFFF, 0xFFFFFFFF, FALSE),
  43     HOWTO (R_TIC30_PC16, 2, 1, 16, TRUE, 0, complain_overflow_signed, NULL,
  44            "PCREL", FALSE, 0x0000FFFF, 0x0000FFFF, FALSE),
  45     EMPTY_HOWTO (-1)
  46   };
  47
  48 #ifndef coff_bfd_reloc_type_lookup
  49 #define coff_bfd_reloc_type_lookup tic30_coff_reloc_type_lookup
  50 #define coff_bfd_reloc_name_lookup tic30_coff_reloc_name_lookup
  51
  52 /* For the case statement use the code values used in tc_gen_reloc to
  53    map to the howto table entries that match those in both the aout
  54    and coff implementations.  */
  55
  56 static reloc_howto_type *
  57 tic30_coff_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
  58                               bfd_reloc_code_real_type code)
  59 {
  60   switch (code)
  61     {
  62     case BFD_RELOC_8:
  63     case BFD_RELOC_TIC30_LDP:
  64       return &tic30_coff_howto_table[2];
  65     case BFD_RELOC_16:
  66       return &tic30_coff_howto_table[0];
  67     case BFD_RELOC_24:
  68       return &tic30_coff_howto_table[1];
  69     case BFD_RELOC_16_PCREL:
  70       return &tic30_coff_howto_table[4];
  71     case BFD_RELOC_32:
  72       return &tic30_coff_howto_table[3];
  73     default:
  74       return (reloc_howto_type *) NULL;
  75     }
  76 }
  77
  78 static reloc_howto_type *
  79 tic30_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
  80                               const char *r_name)
  81 {
  82   unsigned int i;
  83
  84   for (i = 0;
  85        i < (sizeof (tic30_coff_howto_table)
  86             / sizeof (tic30_coff_howto_table[0]));
  87        i++)
  88     if (tic30_coff_howto_table[i].name != NULL
  89         && strcasecmp (tic30_coff_howto_table[i].name, r_name) == 0)
  90       return &tic30_coff_howto_table[i];
  91
  92   return NULL;
  93 }
  94
  95 #endif
  96
  97 /* Turn a howto into a reloc number.  */
  98
  99 static int
 100 coff_tic30_select_reloc (reloc_howto_type *howto)
 101 {
 102   return howto->type;
 103 }
 104
 105 #define SELECT_RELOC(x,howto) x.r_type = coff_tic30_select_reloc(howto)
 106
 107 #define BADMAG(x) TIC30BADMAG(x)
 108 #define TIC30 1                 /* Customize coffcode.h */
 109 #define __A_MAGIC_SET__
 110
 111 /* Code to swap in the reloc */
 112 #define SWAP_IN_RELOC_OFFSET  H_GET_32
 113 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
 114 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
 115 dst->r_stuff[1] = 'C';
 116
 117 /* Code to turn a r_type into a howto ptr, uses the above howto table.  */
 118
 119 static void
 120 rtype2howto (arelent *internal, struct internal_reloc *dst)
 121 {
 122   switch (dst->r_type)
 123     {
 124     case R_TIC30_ABS16:
 125       internal->howto = &tic30_coff_howto_table[0];
 126       break;
 127     case R_TIC30_ABS24:
 128       internal->howto = &tic30_coff_howto_table[1];
 129       break;
 130     case R_TIC30_ABS32:
 131       internal->howto = &tic30_coff_howto_table[3];
 132       break;
 133     case R_TIC30_LDP:
 134       internal->howto = &tic30_coff_howto_table[2];
 135       break;
 136     case R_TIC30_PC16:
 137       internal->howto = &tic30_coff_howto_table[4];
 138       break;
 139     default:
 140       abort ();
 141       break;
 142     }
 143 }
 144
 145 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
 146
 147 /* Perform any necessary magic to the addend in a reloc entry */
 148
 149 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 150  cache_ptr->addend =  ext_reloc.r_offset;
 151
 152 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 153  reloc_processing(relent, reloc, symbols, abfd, section)
 154
 155 static void
 156 reloc_processing (arelent *relent,
 157                   struct internal_reloc *reloc,
 158                   asymbol **symbols,
 159                   bfd *abfd,
 160                   asection *section)
 161 {
 162   relent->address = reloc->r_vaddr;
 163   rtype2howto (relent, reloc);
 164
 165   if (reloc->r_symndx > 0)
 166     relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 167   else
 168     relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 169
 170   relent->addend = reloc->r_offset;
 171   relent->address -= section->vma;
 172 }
 173
 174 #ifndef bfd_pe_print_pdata
 175 #define bfd_pe_print_pdata      NULL
 176 #endif
 177
 178 #include "coffcode.h"
 179
 180 const bfd_target tic30_coff_vec =
 181 {
 182   "coff-tic30",                 /* name */
 183   bfd_target_coff_flavour,
 184   BFD_ENDIAN_BIG,               /* data byte order is big */
 185   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 186
 187   (HAS_RELOC | EXEC_P |         /* object flags */
 188    HAS_LINENO | HAS_DEBUG |
 189    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 190
 191   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 192   '_',                          /* leading symbol underscore */
 193   '/',                          /* ar_pad_char */
 194   15,                           /* ar_max_namelen */
 195   0,                            /* match priority.  */
 196   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 197   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 198   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* data */
 199   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 200   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 201   bfd_getl16, bfd_getl_signed_16, bfd_putl16,   /* hdrs */
 202
 203   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 204    bfd_generic_archive_p, _bfd_dummy_target},
 205   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 206    bfd_false},
 207   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 208    _bfd_write_archive_contents, bfd_false},
 209
 210   BFD_JUMP_TABLE_GENERIC (coff),
 211   BFD_JUMP_TABLE_COPY (coff),
 212   BFD_JUMP_TABLE_CORE (_bfd_nocore),
 213   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 214   BFD_JUMP_TABLE_SYMBOLS (coff),
 215   BFD_JUMP_TABLE_RELOCS (coff),
 216   BFD_JUMP_TABLE_WRITE (coff),
 217   BFD_JUMP_TABLE_LINK (coff),
 218   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 219
 220   NULL,
 221
 222   COFF_SWAP_TABLE
 223 };