aout-adobe.c

来自「基于4个mips核的noc设计」· C语言 代码 · 共 563 行 · 第 1/2 页

static boolean
aout_adobe_write_object_contents (abfd)
     bfd *abfd;
{
  struct external_exec swapped_hdr;
  static struct external_segdesc sentinel[1];	/* Initialized to zero.  */
  asection *sect;

  exec_hdr (abfd)->a_info = ZMAGIC;

  /* Calculate text size as total of text sections, etc.  */

  exec_hdr (abfd)->a_text = 0;
  exec_hdr (abfd)->a_data = 0;
  exec_hdr (abfd)->a_bss  = 0;
  exec_hdr (abfd)->a_trsize = 0;
  exec_hdr (abfd)->a_drsize = 0;

  for (sect = abfd->sections; sect; sect = sect->next)
    {
      if (sect->flags & SEC_CODE)
	{
	  exec_hdr (abfd)->a_text += sect->_raw_size;
	  exec_hdr (abfd)->a_trsize += sect->reloc_count *
	    sizeof (struct reloc_std_external);
	}
      else if (sect->flags & SEC_DATA)
	{
	  exec_hdr (abfd)->a_data += sect->_raw_size;
	  exec_hdr (abfd)->a_drsize += sect->reloc_count *
	    sizeof (struct reloc_std_external);
	}
      else if (sect->flags & SEC_ALLOC && !(sect->flags & SEC_LOAD))
	{
	  exec_hdr (abfd)->a_bss += sect->_raw_size;
	}
    }

  exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd)
    * sizeof (struct external_nlist);
  exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);

  aout_adobe_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);

  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
      || (bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd)
	  != EXEC_BYTES_SIZE))
    return false;

  /* Now write out the section information.  Text first, data next, rest
     afterward.  */

  for (sect = abfd->sections; sect; sect = sect->next)
    {
      if (sect->flags & SEC_CODE)
	{
	  aout_adobe_write_section (abfd, sect);
	}
    }
  for (sect = abfd->sections; sect; sect = sect->next)
    {
      if (sect->flags & SEC_DATA)
	{
	  aout_adobe_write_section (abfd, sect);
	}
    }
  for (sect = abfd->sections; sect; sect = sect->next)
    {
      if (!(sect->flags & (SEC_CODE | SEC_DATA)))
	{
	  aout_adobe_write_section (abfd, sect);
	}
    }

  /* Write final `sentinel` section header (with type of 0).  */
  if (bfd_write ((PTR) sentinel, 1, sizeof (*sentinel), abfd)
      != sizeof (*sentinel))
    return false;

  /* Now write out reloc info, followed by syms and strings.  */
  if (bfd_get_symcount (abfd) != 0)
    {
      if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (*exec_hdr (abfd))), SEEK_SET)
	  != 0)
	return false;

      if (! aout_32_write_syms (abfd))
	return false;

      if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (*exec_hdr (abfd))), SEEK_SET)
	  != 0)
	return false;

      for (sect = abfd->sections; sect; sect = sect->next)
	{
	  if (sect->flags & SEC_CODE)
	    {
	      if (!aout_32_squirt_out_relocs (abfd, sect))
		return false;
	    }
	}

      if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (*exec_hdr (abfd))), SEEK_SET)
	  != 0)
	return false;

      for (sect = abfd->sections; sect; sect = sect->next)
	{
	  if (sect->flags & SEC_DATA)
	    {
	      if (!aout_32_squirt_out_relocs (abfd, sect))
		return false;
	    }
	}
    }
  return true;
}

static void
aout_adobe_write_section (abfd, sect)
     bfd *abfd ATTRIBUTE_UNUSED;
     sec_ptr sect ATTRIBUTE_UNUSED;
{
  /* FIXME XXX */
}

static boolean
aout_adobe_set_section_contents (abfd, section, location, offset, count)
     bfd *abfd;
     asection *section;
     PTR location;
     file_ptr offset;
     bfd_size_type count;
{
  file_ptr section_start;
  sec_ptr sect;

  /* Set by bfd.c handler.  */
  if (abfd->output_has_begun == false)
    {
      /* Assign file offsets to sections.  Text sections are first, and
	 are contiguous.  Then data sections.  Everything else at the end.  */

      section_start = N_TXTOFF (ignore<-->me);

      for (sect = abfd->sections; sect; sect = sect->next)
	{
	  if (sect->flags & SEC_CODE)
	    {
	      sect->filepos = section_start;
	      /* FIXME:  Round to alignment.  */
	      section_start += sect->_raw_size;
	    }
	}

      for (sect = abfd->sections; sect; sect = sect->next)
	{
	  if (sect->flags & SEC_DATA)
	    {
	      sect->filepos = section_start;
	      /* FIXME:  Round to alignment.  */
	      section_start += sect->_raw_size;
	    }
	}

      for (sect = abfd->sections; sect; sect = sect->next)
	{
	  if (sect->flags & SEC_HAS_CONTENTS &&
	      !(sect->flags & (SEC_CODE | SEC_DATA)))
	    {
	      sect->filepos = section_start;
	      /* FIXME:  Round to alignment.  */
	      section_start += sect->_raw_size;
	    }
	}
    }

  /* Regardless, once we know what we're doing, we might as well get
     going.  */
  if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
    return false;

  if (count != 0)
    {
      return (bfd_write ((PTR) location, 1, count, abfd) == count) ? true : false;
    }
  return true;
}

static boolean
aout_adobe_set_arch_mach (abfd, arch, machine)
     bfd *abfd;
     enum bfd_architecture arch;
     unsigned long machine;
{
  if (! bfd_default_set_arch_mach (abfd, arch, machine))
    return false;

  if (arch == bfd_arch_unknown
      || arch == bfd_arch_m68k)
    return true;

  return false;
}

static int
aout_adobe_sizeof_headers (ignore_abfd, ignore)
     bfd *ignore_abfd ATTRIBUTE_UNUSED;
     boolean ignore ATTRIBUTE_UNUSED;
{
  return sizeof (struct internal_exec);
}

/* Build the transfer vector for Adobe A.Out files.  */

#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info

#define aout_32_bfd_make_debug_symbol \
  ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)

#define aout_32_bfd_reloc_type_lookup \
  ((reloc_howto_type *(*) \
    PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)

#define	aout_32_set_arch_mach		aout_adobe_set_arch_mach
#define	aout_32_set_section_contents	aout_adobe_set_section_contents

#define	aout_32_sizeof_headers		aout_adobe_sizeof_headers
#define aout_32_bfd_get_relocated_section_contents \
  bfd_generic_get_relocated_section_contents
#define aout_32_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
#define aout_32_bfd_relax_section       bfd_generic_relax_section
#define aout_32_bfd_gc_sections         bfd_generic_gc_sections
#define aout_32_bfd_link_hash_table_create \
  _bfd_generic_link_hash_table_create
#define aout_32_bfd_link_add_symbols	_bfd_generic_link_add_symbols
#define aout_32_bfd_final_link		_bfd_generic_final_link
#define aout_32_bfd_link_split_section	_bfd_generic_link_split_section

const bfd_target a_out_adobe_vec = {
  "a.out.adobe",		/* name */
  bfd_target_aout_flavour,
  BFD_ENDIAN_BIG,		/* data byte order is unknown (big assumed) */
  BFD_ENDIAN_BIG,		/* hdr byte order is big */
  (HAS_RELOC | EXEC_P |		/* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | WP_TEXT ),
  /* section flags */
  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_DATA | SEC_RELOC),
  '_',				/*  symbol leading char */
  ' ',				/* ar_pad_char */
  16,				/* ar_max_namelen */

  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_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* hdrs */
  {_bfd_dummy_target, aout_adobe_object_p,	/* bfd_check_format */
   bfd_generic_archive_p, _bfd_dummy_target},
  {bfd_false, aout_adobe_mkobject,	/* bfd_set_format */
   _bfd_generic_mkarchive, bfd_false},
  {bfd_false, aout_adobe_write_object_contents,	/* bfd_write_contents */
   _bfd_write_archive_contents, bfd_false},

  BFD_JUMP_TABLE_GENERIC (aout_32),
  BFD_JUMP_TABLE_COPY (_bfd_generic),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
  BFD_JUMP_TABLE_SYMBOLS (aout_32),
  BFD_JUMP_TABLE_RELOCS (aout_32),
  BFD_JUMP_TABLE_WRITE (aout_32),
  BFD_JUMP_TABLE_LINK (aout_32),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  (PTR) 0
};