bfd/coff-tic30.c

/* BFD back-end for TMS320C30 coff binaries.
   Copyright (C) 1998-2021 Free Software Foundation, Inc.
   Contributed by Steven Haworth (steve@pm.cse.rmit.edu.au)

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "bfdlink.h"
#include "coff/tic30.h"
#include "coff/internal.h"
#include "libcoff.h"

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)

reloc_howto_type tic30_coff_howto_table[] =
  {
    HOWTO (R_TIC30_ABS16, 2, 1, 16, false, 0, 0, NULL,
	   "16", false, 0x0000FFFF, 0x0000FFFF, false),
    HOWTO (R_TIC30_ABS24, 2, 2, 24, false, 8, complain_overflow_bitfield, NULL,
	   "24", false, 0xFFFFFF00, 0xFFFFFF00, false),
    HOWTO (R_TIC30_LDP, 18, 0, 24, false, 0, complain_overflow_bitfield, NULL,
	   "LDP", false, 0x00FF0000, 0x000000FF, false),
    HOWTO (R_TIC30_ABS32, 2, 2, 32, false, 0, complain_overflow_bitfield, NULL,
	   "32", false, 0xFFFFFFFF, 0xFFFFFFFF, false),
    HOWTO (R_TIC30_PC16, 2, 1, 16, true, 0, complain_overflow_signed, NULL,
	   "PCREL", false, 0x0000FFFF, 0x0000FFFF, false),
    EMPTY_HOWTO (-1)
  };

#ifndef coff_bfd_reloc_type_lookup
#define coff_bfd_reloc_type_lookup tic30_coff_reloc_type_lookup
#define coff_bfd_reloc_name_lookup tic30_coff_reloc_name_lookup

/* For the case statement use the code values used in tc_gen_reloc to
   map to the howto table entries that match those in both the aout
   and coff implementations.  */

static reloc_howto_type *
tic30_coff_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
			      bfd_reloc_code_real_type code)
{
  switch (code)
    {
    case BFD_RELOC_8:
    case BFD_RELOC_TIC30_LDP:
      return &tic30_coff_howto_table[2];
    case BFD_RELOC_16:
      return &tic30_coff_howto_table[0];
    case BFD_RELOC_24:
      return &tic30_coff_howto_table[1];
    case BFD_RELOC_16_PCREL:
      return &tic30_coff_howto_table[4];
    case BFD_RELOC_32:
      return &tic30_coff_howto_table[3];
    default:
      return (reloc_howto_type *) NULL;
    }
}

static reloc_howto_type *
tic30_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
			      const char *r_name)
{
  unsigned int i;

  for (i = 0;
       i < (sizeof (tic30_coff_howto_table)
	    / sizeof (tic30_coff_howto_table[0]));
       i++)
    if (tic30_coff_howto_table[i].name != NULL
	&& strcasecmp (tic30_coff_howto_table[i].name, r_name) == 0)
      return &tic30_coff_howto_table[i];

  return NULL;
}

#endif

/* Turn a howto into a reloc number.  */

static int
coff_tic30_select_reloc (reloc_howto_type *howto)
{
  return howto->type;
}

#define SELECT_RELOC(x,howto) x.r_type = coff_tic30_select_reloc(howto)

#define BADMAG(x) TIC30BADMAG(x)
#define TIC30 1			/* Customize coffcode.h */
#define __A_MAGIC_SET__

/* Code to swap in the reloc */
#define SWAP_IN_RELOC_OFFSET  H_GET_32
#define SWAP_OUT_RELOC_OFFSET H_PUT_32
#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
dst->r_stuff[1] = 'C';

/* Code to turn a r_type into a howto ptr, uses the above howto table.  */

static void
rtype2howto (arelent *internal, struct internal_reloc *dst)
{
  switch (dst->r_type)
    {
    case R_TIC30_ABS16:
      internal->howto = &tic30_coff_howto_table[0];
      break;
    case R_TIC30_ABS24:
      internal->howto = &tic30_coff_howto_table[1];
      break;
    case R_TIC30_ABS32:
      internal->howto = &tic30_coff_howto_table[3];
      break;
    case R_TIC30_LDP:
      internal->howto = &tic30_coff_howto_table[2];
      break;
    case R_TIC30_PC16:
      internal->howto = &tic30_coff_howto_table[4];
      break;
    default:
      internal->howto = NULL;
      break;
    }
}

#define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)

/* Perform any necessary magic to the addend in a reloc entry */

#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
 cache_ptr->addend =  ext_reloc.r_offset;

#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
 reloc_processing(relent, reloc, symbols, abfd, section)

static void
reloc_processing (arelent *relent,
		  struct internal_reloc *reloc,
		  asymbol **symbols,
		  bfd *abfd,
		  asection *section)
{
  relent->address = reloc->r_vaddr;
  rtype2howto (relent, reloc);

  if (reloc->r_symndx == -1)
    relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
  else if (reloc->r_symndx >= 0 && reloc->r_symndx < obj_conv_table_size (abfd))
    relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
  else
    {
      _bfd_error_handler
	/* xgettext:c-format */
	(_("%pB: warning: illegal symbol index %ld in relocs"),
	 abfd, reloc->r_symndx);
      relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
    }
  relent->addend = reloc->r_offset;
  relent->address -= section->vma;
}

#ifndef bfd_pe_print_pdata
#define bfd_pe_print_pdata	NULL
#endif

#include "coffcode.h"

const bfd_target tic30_coff_vec =
{
  "coff-tic30",			/* name */
  bfd_target_coff_flavour,
  BFD_ENDIAN_BIG,		/* data byte order is big */
  BFD_ENDIAN_LITTLE,		/* header byte order is little */

  (HAS_RELOC | EXEC_P		/* object flags */
   | HAS_LINENO | HAS_DEBUG
   | HAS_SYMS | HAS_LOCALS | WP_TEXT),

  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
  '_',				/* leading symbol underscore */
  '/',				/* ar_pad_char */
  15,				/* ar_max_namelen */
  0,				/* match priority.  */
  TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* data */
  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
  bfd_getl32, bfd_getl_signed_32, bfd_putl32,
  bfd_getl16, bfd_getl_signed_16, bfd_putl16,	/* hdrs */

  {				/* bfd_check_format */
    _bfd_dummy_target,
    coff_object_p,
    bfd_generic_archive_p,
    _bfd_dummy_target
  },
  {				/* bfd_set_format */
    _bfd_bool_bfd_false_error,
    coff_mkobject,
    _bfd_generic_mkarchive,
    _bfd_bool_bfd_false_error
  },
  {				/* bfd_write_contents */
    _bfd_bool_bfd_false_error,
    coff_write_object_contents,
    _bfd_write_archive_contents,
    _bfd_bool_bfd_false_error
  },

  BFD_JUMP_TABLE_GENERIC (coff),
  BFD_JUMP_TABLE_COPY (coff),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
  BFD_JUMP_TABLE_SYMBOLS (coff),
  BFD_JUMP_TABLE_RELOCS (coff),
  BFD_JUMP_TABLE_WRITE (coff),
  BFD_JUMP_TABLE_LINK (coff),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  COFF_SWAP_TABLE
};