coff-sparc.c

来自「基于4个mips核的noc设计」· C语言 代码 · 共 215 行

/* BFD back-end for Sparc COFF files.
   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000
   Free Software Foundation, Inc.
   Written by Cygnus Support.

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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

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

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)

#define BADMAG(x) ((x).f_magic != SPARCMAGIC && (x).f_magic != LYNXCOFFMAGIC)

/* The page size is a guess based on ELF.  */
#define COFF_PAGE_SIZE 0x10000

enum reloc_type
  {
    R_SPARC_NONE = 0,
    R_SPARC_8,		R_SPARC_16,		R_SPARC_32,
    R_SPARC_DISP8,	R_SPARC_DISP16,		R_SPARC_DISP32,
    R_SPARC_WDISP30,	R_SPARC_WDISP22,
    R_SPARC_HI22,	R_SPARC_22,
    R_SPARC_13,		R_SPARC_LO10,
    R_SPARC_GOT10,	R_SPARC_GOT13,		R_SPARC_GOT22,
    R_SPARC_PC10,	R_SPARC_PC22,
    R_SPARC_WPLT30,
    R_SPARC_COPY,
    R_SPARC_GLOB_DAT,	R_SPARC_JMP_SLOT,
    R_SPARC_RELATIVE,
    R_SPARC_UA32,
    R_SPARC_max
  };

#if 0
static CONST char *CONST reloc_type_names[] =
{
  "R_SPARC_NONE",
  "R_SPARC_8",		"R_SPARC_16",		"R_SPARC_32",
  "R_SPARC_DISP8",	"R_SPARC_DISP16",	"R_SPARC_DISP32",
  "R_SPARC_WDISP30",	"R_SPARC_WDISP22",
  "R_SPARC_HI22",	"R_SPARC_22",
  "R_SPARC_13",		"R_SPARC_LO10",
  "R_SPARC_GOT10",	"R_SPARC_GOT13",	"R_SPARC_GOT22",
  "R_SPARC_PC10",	"R_SPARC_PC22",
  "R_SPARC_WPLT30",
  "R_SPARC_COPY",
  "R_SPARC_GLOB_DAT",	"R_SPARC_JMP_SLOT",
  "R_SPARC_RELATIVE",
  "R_SPARC_UA32",
};
#endif

/* This is stolen pretty directly from elf.c.  */
static bfd_reloc_status_type
bfd_coff_generic_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR,
				asection *, bfd *, char **));

static bfd_reloc_status_type
bfd_coff_generic_reloc (abfd, reloc_entry, symbol, data, input_section,
			output_bfd, error_message)
     bfd *abfd ATTRIBUTE_UNUSED;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data ATTRIBUTE_UNUSED;
     asection *input_section;
     bfd *output_bfd;
     char **error_message ATTRIBUTE_UNUSED;
{
  if (output_bfd != (bfd *) NULL
      && (symbol->flags & BSF_SECTION_SYM) == 0)
    {
      reloc_entry->address += input_section->output_offset;
      return bfd_reloc_ok;
    }

  return bfd_reloc_continue;
}

static reloc_howto_type coff_sparc_howto_table[] =
{
  HOWTO(R_SPARC_NONE,    0,0, 0,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_NONE",    false,0,0x00000000,true),
  HOWTO(R_SPARC_8,       0,0, 8,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_8",       false,0,0x000000ff,true),
  HOWTO(R_SPARC_16,      0,1,16,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_16",      false,0,0x0000ffff,true),
  HOWTO(R_SPARC_32,      0,2,32,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_32",      false,0,0xffffffff,true),
  HOWTO(R_SPARC_DISP8,   0,0, 8,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP8",   false,0,0x000000ff,true),
  HOWTO(R_SPARC_DISP16,  0,1,16,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP16",  false,0,0x0000ffff,true),
  HOWTO(R_SPARC_DISP32,  0,2,32,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP32",  false,0,0x00ffffff,true),
  HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP30", false,0,0x3fffffff,true),
  HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP22", false,0,0x003fffff,true),
  HOWTO(R_SPARC_HI22,   10,2,22,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_HI22",    false,0,0x003fffff,true),
  HOWTO(R_SPARC_22,      0,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_22",      false,0,0x003fffff,true),
  HOWTO(R_SPARC_13,      0,2,13,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_13",      false,0,0x00001fff,true),
  HOWTO(R_SPARC_LO10,    0,2,10,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_LO10",    false,0,0x000003ff,true),
  HOWTO(R_SPARC_GOT10,   0,2,10,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT10",   false,0,0x000003ff,true),
  HOWTO(R_SPARC_GOT13,   0,2,13,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT13",   false,0,0x00001fff,true),
  HOWTO(R_SPARC_GOT22,  10,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT22",   false,0,0x003fffff,true),
  HOWTO(R_SPARC_PC10,    0,2,10,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC10",    false,0,0x000003ff,true),
  HOWTO(R_SPARC_PC22,    0,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC22",    false,0,0x003fffff,true),
  HOWTO(R_SPARC_WPLT30,  0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_WPLT30",  false,0,0x00000000,true),
  HOWTO(R_SPARC_COPY,    0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_COPY",    false,0,0x00000000,true),
  HOWTO(R_SPARC_GLOB_DAT,0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_GLOB_DAT",false,0,0x00000000,true),
  HOWTO(R_SPARC_JMP_SLOT,0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_JMP_SLOT",false,0,0x00000000,true),
  HOWTO(R_SPARC_RELATIVE,0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_RELATIVE",false,0,0x00000000,true),
  HOWTO(R_SPARC_UA32,    0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_UA32",    false,0,0x00000000,true),
};

struct coff_reloc_map {
  bfd_reloc_code_real_type bfd_reloc_val;
  unsigned char coff_reloc_val;
};

static CONST struct coff_reloc_map sparc_reloc_map[] =
{
  { BFD_RELOC_NONE, R_SPARC_NONE, },
  { BFD_RELOC_16, R_SPARC_16, },
  { BFD_RELOC_8, R_SPARC_8 },
  { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
  { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits.  */
  { BFD_RELOC_32, R_SPARC_32 },
  { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
  { BFD_RELOC_HI22, R_SPARC_HI22 },
  { BFD_RELOC_LO10, R_SPARC_LO10, },
  { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
  { BFD_RELOC_SPARC22, R_SPARC_22 },
  { BFD_RELOC_SPARC13, R_SPARC_13 },
  { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
  { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
  { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
  { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
  { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
  { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
  { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
  { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
  { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
  { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
  { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
  /*  { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
};

static reloc_howto_type *
coff_sparc_reloc_type_lookup (abfd, code)
     bfd *abfd ATTRIBUTE_UNUSED;
     bfd_reloc_code_real_type code;
{
  unsigned int i;
  for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct coff_reloc_map); i++)
    {
      if (sparc_reloc_map[i].bfd_reloc_val == code)
	return &coff_sparc_howto_table[(int) sparc_reloc_map[i].coff_reloc_val];
    }
  return 0;
}
#define coff_bfd_reloc_type_lookup	coff_sparc_reloc_type_lookup

static void
rtype2howto (cache_ptr, dst)
     arelent *cache_ptr;
     struct internal_reloc *dst;
{
  BFD_ASSERT (dst->r_type < (unsigned int) R_SPARC_max);
  cache_ptr->howto = &coff_sparc_howto_table[dst->r_type];
}

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

#define SWAP_IN_RELOC_OFFSET	bfd_h_get_32
#define SWAP_OUT_RELOC_OFFSET	bfd_h_put_32
#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
  cache_ptr->addend = reloc.r_offset;

/* Clear the r_spare field in relocs.  */
#define SWAP_OUT_RELOC_EXTRA(abfd,src,dst) \
  do { \
       dst->r_spare[0] = 0; \
       dst->r_spare[1] = 0; \
     } while (0)

#define __A_MAGIC_SET__

/* Enable Sparc-specific hacks in coffcode.h.  */

#define COFF_SPARC

#include "coffcode.h"

#ifndef TARGET_SYM
#define TARGET_SYM sparccoff_vec
#endif

#ifndef TARGET_NAME
#define TARGET_NAME "coff-sparc"
#endif

CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL)