bfd/coff-tic30.c

   1 /* BFD back-end for TMS320C30 coff binaries.
   2    Copyright (C) 1998-2017 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 3 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 "sysdep.h"
  23 #include "bfd.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 #define coff_bfd_reloc_name_lookup tic30_coff_reloc_name_lookup
  50
  51 /* For the case statement use the code values used in tc_gen_reloc to
  52    map to the howto table entries that match those in both the aout
  53    and coff implementations.  */
  54
  55 static reloc_howto_type *
  56 tic30_coff_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
  57                               bfd_reloc_code_real_type code)
  58 {
  59   switch (code)
  60     {
  61     case BFD_RELOC_8:
  62     case BFD_RELOC_TIC30_LDP:
  63       return &tic30_coff_howto_table[2];
  64     case BFD_RELOC_16:
  65       return &tic30_coff_howto_table[0];
  66     case BFD_RELOC_24:
  67       return &tic30_coff_howto_table[1];
  68     case BFD_RELOC_16_PCREL:
  69       return &tic30_coff_howto_table[4];
  70     case BFD_RELOC_32:
  71       return &tic30_coff_howto_table[3];
  72     default:
  73       return (reloc_howto_type *) NULL;
  74     }
  75 }
  76
  77 static reloc_howto_type *
  78 tic30_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
  79                               const char *r_name)
  80 {
  81   unsigned int i;
  82
  83   for (i = 0;
  84        i < (sizeof (tic30_coff_howto_table)
  85             / sizeof (tic30_coff_howto_table[0]));
  86        i++)
  87     if (tic30_coff_howto_table[i].name != NULL
  88         && strcasecmp (tic30_coff_howto_table[i].name, r_name) == 0)
  89       return &tic30_coff_howto_table[i];
  90
  91   return NULL;
  92 }
  93
  94 #endif
  95
  96 /* Turn a howto into a reloc number.  */
  97
  98 static int
  99 coff_tic30_select_reloc (reloc_howto_type *howto)
 100 {
 101   return howto->type;
 102 }
 103
 104 #define SELECT_RELOC(x,howto) x.r_type = coff_tic30_select_reloc(howto)
 105
 106 #define BADMAG(x) TIC30BADMAG(x)
 107 #define TIC30 1                 /* Customize coffcode.h */
 108 #define __A_MAGIC_SET__
 109
 110 /* Code to swap in the reloc */
 111 #define SWAP_IN_RELOC_OFFSET  H_GET_32
 112 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
 113 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
 114 dst->r_stuff[1] = 'C';
 115
 116 /* Code to turn a r_type into a howto ptr, uses the above howto table.  */
 117
 118 static void
 119 rtype2howto (arelent *internal, struct internal_reloc *dst)
 120 {
 121   switch (dst->r_type)
 122     {
 123     case R_TIC30_ABS16:
 124       internal->howto = &tic30_coff_howto_table[0];
 125       break;
 126     case R_TIC30_ABS24:
 127       internal->howto = &tic30_coff_howto_table[1];
 128       break;
 129     case R_TIC30_ABS32:
 130       internal->howto = &tic30_coff_howto_table[3];
 131       break;
 132     case R_TIC30_LDP:
 133       internal->howto = &tic30_coff_howto_table[2];
 134       break;
 135     case R_TIC30_PC16:
 136       internal->howto = &tic30_coff_howto_table[4];
 137       break;
 138     default:
 139       internal->howto = NULL;
 140       break;
 141     }
 142 }
 143
 144 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
 145
 146 /* Perform any necessary magic to the addend in a reloc entry */
 147
 148 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 149  cache_ptr->addend =  ext_reloc.r_offset;
 150
 151 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 152  reloc_processing(relent, reloc, symbols, abfd, section)
 153
 154 static void
 155 reloc_processing (arelent *relent,
 156                   struct internal_reloc *reloc,
 157                   asymbol **symbols,
 158                   bfd *abfd,
 159                   asection *section)
 160 {
 161   relent->address = reloc->r_vaddr;
 162   rtype2howto (relent, reloc);
 163
 164   if (reloc->r_symndx > 0)
 165     relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
 166   else
 167     relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 168
 169   relent->addend = reloc->r_offset;
 170   relent->address -= section->vma;
 171 }
 172
 173 #ifndef bfd_pe_print_pdata
 174 #define bfd_pe_print_pdata      NULL
 175 #endif
 176
 177 #include "coffcode.h"
 178
 179 const bfd_target tic30_coff_vec =
 180 {
 181   "coff-tic30",                 /* name */
 182   bfd_target_coff_flavour,
 183   BFD_ENDIAN_BIG,               /* data byte order is big */
 184   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 185
 186   (HAS_RELOC | EXEC_P |         /* object flags */
 187    HAS_LINENO | HAS_DEBUG |
 188    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 189
 190   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 191   '_',                          /* leading symbol underscore */
 192   '/',                          /* ar_pad_char */
 193   15,                           /* ar_max_namelen */
 194   0,                            /* match priority.  */
 195   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 196   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 197   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* data */
 198   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 199   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 200   bfd_getl16, bfd_getl_signed_16, bfd_putl16,   /* hdrs */
 201
 202   {_bfd_dummy_target, coff_object_p,    /* bfd_check_format */
 203    bfd_generic_archive_p, _bfd_dummy_target},
 204   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,    /* bfd_set_format */
 205    bfd_false},
 206   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 207    _bfd_write_archive_contents, bfd_false},
 208
 209   BFD_JUMP_TABLE_GENERIC (coff),
 210   BFD_JUMP_TABLE_COPY (coff),
 211   BFD_JUMP_TABLE_CORE (_bfd_nocore),
 212   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 213   BFD_JUMP_TABLE_SYMBOLS (coff),
 214   BFD_JUMP_TABLE_RELOCS (coff),
 215   BFD_JUMP_TABLE_WRITE (coff),
 216   BFD_JUMP_TABLE_LINK (coff),
 217   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 218
 219   NULL,
 220
 221   COFF_SWAP_TABLE
 222 };