aout-adobe.c

早期freebsd实现

  rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct));
  if (rawptr == NULL) {
      bfd_error = no_memory;
      return false;
    }

  abfd->tdata.bout_data = rawptr;
  exec_hdr (abfd) = &rawptr->e;

  adata(abfd).reloc_entry_size = sizeof (struct reloc_std_external);
  adata(abfd).symbol_entry_size = sizeof (struct external_nlist);
  adata(abfd).page_size = 1; /* Not applicable. */
  adata(abfd).segment_size = 1; /* Not applicable. */
  adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;

  return true;
}


static boolean
aout_adobe_write_object_contents (abfd)
     bfd *abfd;
{
  struct external_exec swapped_hdr;
  static struct external_segdesc sentinel[1] = {0};
  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);

  bfd_seek (abfd, (file_ptr) 0, SEEK_SET);
  bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd);

  /* 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).  */
  bfd_write ((PTR) sentinel, 1, sizeof (*sentinel), abfd);

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

      aout_32_write_syms (abfd);

      bfd_seek (abfd, (file_ptr)(N_TRELOFF(*exec_hdr(abfd))), SEEK_SET);

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

      bfd_seek (abfd, (file_ptr)(N_DRELOFF(*exec_hdr(abfd))), SEEK_SET);

      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;
     sec_ptr sect;
{
  /* FIXME XXX */
}

static boolean
aout_adobe_set_section_contents (abfd, section, location, offset, count)
     bfd *abfd;
     sec_ptr section;
     unsigned char *location;
     file_ptr offset;
      int count;
{
  file_ptr section_start;
  sec_ptr sect;

  if (abfd->output_has_begun == false) { /* set by bfd.c handler */

    /* 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 */
  bfd_seek (abfd, section->filepos + offset, SEEK_SET);

  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;
{
  bfd_default_set_arch_mach(abfd, arch, machine);

  if (arch == bfd_arch_unknown)	/* Unknown machine arch is OK */
    return true;

  return false;
}

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




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

/* We don't have core files.  */
#define	aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
#define	aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
#define	aout_32_core_file_matches_executable_p	\
				_bfd_dummy_core_file_matches_executable_p

/* We use BSD-Unix generic archive files.  */
#define	aout_32_openr_next_archived_file	bfd_generic_openr_next_archived_file
#define	aout_32_generic_stat_arch_elt	bfd_generic_stat_arch_elt
#define	aout_32_slurp_armap		bfd_slurp_bsd_armap
#define	aout_32_slurp_extended_name_table	bfd_true
#define	aout_32_write_armap		bsd_write_armap
#define	aout_32_truncate_arname		bfd_bsd_truncate_arname

/* We override these routines from the usual a.out file routines.  */
#define	aout_32_set_section_contents	aout_adobe_set_section_contents
#define	aout_32_set_arch_mach		aout_adobe_set_arch_mach
#define	aout_32_sizeof_headers		aout_adobe_sizeof_headers

#define aout_32_bfd_debug_info_start		bfd_void
#define aout_32_bfd_debug_info_end		bfd_void
#define aout_32_bfd_debug_info_accumulate	(PROTO(void,(*),(bfd*, struct sec *))) bfd_void

#define aout_32_bfd_get_relocated_section_contents  bfd_generic_get_relocated_section_contents
#define aout_32_bfd_relax_section                   bfd_generic_relax_section

bfd_target a_out_adobe_vec =
{
  "a.out.adobe",		/* name */
  bfd_target_aout_flavour,
  true,				/* data byte order is unknown (big assumed) */
  true,				/* hdr byte order is big */
  (HAS_RELOC | EXEC_P |		/* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | DYNAMIC | 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 */
  2,				/* minumum alignment power */

  _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
  _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_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},

  JUMP_TABLE(aout_32)
 };