versados.c

来自「基于4个mips核的noc设计」· C语言 代码 · 共 902 行 · 第 1/2 页

    }
  EDATA (abfd, otr->esdid - 1).pc = dst_idx;

  if (!contents && need_contents)
    esdid->contents = (unsigned char *) bfd_alloc (abfd, esdid->section->_raw_size);

}

static boolean
versados_scan (abfd)
     bfd *abfd;
{
  int loop = 1;
  int i;
  int j;
  int nsecs = 0;

  VDATA (abfd)->stringlen = 0;
  VDATA (abfd)->nrefs = 0;
  VDATA (abfd)->ndefs = 0;
  VDATA (abfd)->ref_idx = 0;
  VDATA (abfd)->def_idx = 0;
  VDATA (abfd)->pass_2_done = 0;

  while (loop)
    {
      union ext_any any;
      if (!get_record (abfd, &any))
	return true;
      switch (any.header.type)
	{
	case VHEADER:
	  break;
	case VEND:
	  loop = 0;
	  break;
	case VESTDEF:
	  process_esd (abfd, &any.esd, 1);
	  break;
	case VOTR:
	  process_otr (abfd, &any.otr, 1);
	  break;
	}
    }

  /* Now allocate space for the relocs and sections */

  VDATA (abfd)->nrefs = VDATA (abfd)->ref_idx;
  VDATA (abfd)->ndefs = VDATA (abfd)->def_idx;
  VDATA (abfd)->ref_idx = 0;
  VDATA (abfd)->def_idx = 0;

  abfd->symcount = VDATA (abfd)->nrefs + VDATA (abfd)->ndefs;

  for (i = 0; i < 16; i++)
    {
      struct esdid *esdid = &EDATA (abfd, i);
      if (esdid->section)
	{
	  esdid->section->relocation
	    = (arelent *) bfd_alloc (abfd, sizeof (arelent) * esdid->relocs);

	  esdid->pc = 0;

	  if (esdid->contents)
	    esdid->section->flags |= SEC_HAS_CONTENTS | SEC_LOAD;

	  esdid->section->reloc_count = esdid->relocs;
	  if (esdid->relocs)
	    esdid->section->flags |= SEC_RELOC;

	  esdid->relocs = 0;

	  /* Add an entry into the symbol table for it */
	  nsecs++;
	  VDATA (abfd)->stringlen += strlen (esdid->section->name) + 1;
	}
    }

  abfd->symcount += nsecs;

  VDATA (abfd)->symbols = (asymbol *) bfd_alloc (abfd,
				       sizeof (asymbol) * (abfd->symcount));

  VDATA (abfd)->strings = bfd_alloc (abfd, VDATA (abfd)->stringlen);

  if ((VDATA (abfd)->symbols == NULL && abfd->symcount > 0)
      || (VDATA (abfd)->strings == NULL && VDATA (abfd)->stringlen > 0))
    return false;

  /* Actually fill in the section symbols,
     we stick them at the end of the table */

  for (j = VDATA (abfd)->nrefs + VDATA (abfd)->ndefs, i = 0; i < 16; i++)
    {
      struct esdid *esdid = &EDATA (abfd, i);
      asection *sec = esdid->section;
      if (sec)
	{
	  asymbol *s = VDATA (abfd)->symbols + j;
	  s->name = new_symbol_string (abfd, sec->name);
	  s->section = sec;
	  s->flags = BSF_LOCAL;
	  s->value = 0;
	  s->the_bfd = abfd;
	  j++;
	}
    }
  if (abfd->symcount)
    abfd->flags |= HAS_SYMS;

  /* Set this to nsecs - since we've already planted the section
     symbols */
  VDATA (abfd)->nsecsyms = nsecs;

  VDATA (abfd)->ref_idx = 0;

  return 1;
}

/* Check whether an existing file is a versados  file.  */

static const bfd_target *
versados_object_p (abfd)
     bfd *abfd;
{
  struct ext_vheader ext;
  unsigned char len;

  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
    return NULL;

  if (bfd_read (&len, 1, 1, abfd) != 1)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if (bfd_read (&ext.type, 1, len, abfd) != len)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* We guess that the language field will never be larger than 10.
     In sample files, it is always either 0 or 1.  Checking for this
     prevents confusion with Intel Hex files.  */
  if (ext.type != VHEADER
      || ext.lang > 10)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  /* OK, looks like a record, build the tdata and read in.  */

  if (!versados_mkobject (abfd)
      || !versados_scan (abfd))
    return NULL;

  return abfd->xvec;
}

static boolean
versados_pass_2 (abfd)
     bfd *abfd;
{
  union ext_any any;

  if (VDATA (abfd)->pass_2_done)
    return 1;

  if (bfd_seek (abfd, 0, SEEK_SET) != 0)
    return 0;

  VDATA (abfd)->es_done = ES_BASE;

  /* read records till we get to where we want to be */

  while (1)
    {
      get_record (abfd, &any);
      switch (any.header.type)
	{
	case VEND:
	  VDATA (abfd)->pass_2_done = 1;
	  return 1;
	case VESTDEF:
	  process_esd (abfd, &any.esd, 2);
	  break;
	case VOTR:
	  process_otr (abfd, &any.otr, 2);
	  break;
	}
    }
}

static boolean
versados_get_section_contents (abfd, section, location, offset, count)
     bfd *abfd;
     asection *section;
     PTR location;
     file_ptr offset;
     bfd_size_type count;
{
  if (!versados_pass_2 (abfd))
    return false;

  memcpy (location,
	  EDATA (abfd, section->target_index).contents + offset,
	  (size_t) count);

  return true;
}

#define versados_get_section_contents_in_window \
  _bfd_generic_get_section_contents_in_window

static boolean
versados_set_section_contents (abfd, section, location, offset, bytes_to_do)
     bfd *abfd ATTRIBUTE_UNUSED;
     sec_ptr section ATTRIBUTE_UNUSED;
     PTR location ATTRIBUTE_UNUSED;
     file_ptr offset ATTRIBUTE_UNUSED;
     bfd_size_type bytes_to_do ATTRIBUTE_UNUSED;
{
  return false;
}

static int
versados_sizeof_headers (abfd, exec)
     bfd *abfd ATTRIBUTE_UNUSED;
     boolean exec ATTRIBUTE_UNUSED;
{
  return 0;
}

static asymbol *
versados_make_empty_symbol (abfd)
     bfd *abfd;
{
  asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
  if (new)
    new->the_bfd = abfd;
  return new;
}

/* Return the amount of memory needed to read the symbol table.  */

static long
versados_get_symtab_upper_bound (abfd)
     bfd *abfd;
{
  return (bfd_get_symcount (abfd) + 1) * sizeof (asymbol *);
}

/* Return the symbol table.  */

static long
versados_get_symtab (abfd, alocation)
     bfd *abfd;
     asymbol **alocation;
{
  unsigned int symcount = bfd_get_symcount (abfd);
  unsigned int i;
  asymbol *s;

  versados_pass_2 (abfd);

  for (i = 0, s = VDATA (abfd)->symbols;
       i < symcount;
       s++, i++)
    {
      *alocation++ = s;
    }

  *alocation = NULL;

  return symcount;
}

void
versados_get_symbol_info (ignore_abfd, symbol, ret)
     bfd *ignore_abfd ATTRIBUTE_UNUSED;
     asymbol *symbol;
     symbol_info *ret;
{
  bfd_symbol_info (symbol, ret);
}

void
versados_print_symbol (ignore_abfd, afile, symbol, how)
     bfd *ignore_abfd ATTRIBUTE_UNUSED;
     PTR afile;
     asymbol *symbol;
     bfd_print_symbol_type how;
{
  FILE *file = (FILE *) afile;
  switch (how)
    {
    case bfd_print_symbol_name:
      fprintf (file, "%s", symbol->name);
      break;
    default:
      bfd_print_symbol_vandf ((PTR) file, symbol);
      fprintf (file, " %-5s %s",
	       symbol->section->name,
	       symbol->name);

    }
}

long
versados_get_reloc_upper_bound (abfd, asect)
     bfd *abfd ATTRIBUTE_UNUSED;
     sec_ptr asect;
{
  return (asect->reloc_count + 1) * sizeof (arelent *);
}

long
versados_canonicalize_reloc (abfd, section, relptr, symbols)
     bfd *abfd;
     sec_ptr section;
     arelent **relptr;
     asymbol **symbols;
{
  unsigned int count;
  arelent *src;

  versados_pass_2 (abfd);
  src = section->relocation;
  if (!EDATA (abfd, section->target_index).donerel)
    {
      EDATA (abfd, section->target_index).donerel = 1;
      /* translate from indexes to symptr ptrs */
      for (count = 0; count < section->reloc_count; count++)
	{
	  int esdid = (int) src[count].sym_ptr_ptr;

	  if (esdid == 0)
	    {
	      src[count].sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
	    }
	  else if (esdid < ES_BASE)	/* Section relative thing */
	    {
	      struct esdid *e = &EDATA (abfd, esdid - 1);
	      if (!section)
		{
		 /** relocation relative to section which was
		   never declared ! */
		}
	      src[count].sym_ptr_ptr = e->section->symbol_ptr_ptr;
	    }
	  else
	    {
	      src[count].sym_ptr_ptr = symbols + esdid - ES_BASE;
	    }

	}
    }

  for (count = 0; count < section->reloc_count; count++)
    {
      *relptr++ = src++;
    }
  *relptr = 0;
  return section->reloc_count;
}

#define	versados_close_and_cleanup _bfd_generic_close_and_cleanup
#define versados_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
#define versados_new_section_hook _bfd_generic_new_section_hook

#define versados_bfd_is_local_label_name bfd_generic_is_local_label_name
#define versados_get_lineno _bfd_nosymbols_get_lineno
#define versados_find_nearest_line _bfd_nosymbols_find_nearest_line
#define versados_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
#define versados_read_minisymbols _bfd_generic_read_minisymbols
#define versados_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol

#define versados_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup

#define versados_set_arch_mach bfd_default_set_arch_mach

#define versados_bfd_get_relocated_section_contents \
  bfd_generic_get_relocated_section_contents
#define versados_bfd_relax_section bfd_generic_relax_section
#define versados_bfd_gc_sections bfd_generic_gc_sections
#define versados_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#define versados_bfd_link_add_symbols _bfd_generic_link_add_symbols
#define versados_bfd_final_link _bfd_generic_final_link
#define versados_bfd_link_split_section _bfd_generic_link_split_section

const bfd_target versados_vec =
{
  "versados",			/* name */
  bfd_target_versados_flavour,
  BFD_ENDIAN_BIG,		/* target byte order */
  BFD_ENDIAN_BIG,		/* target headers byte order */
  (HAS_RELOC | EXEC_P |		/* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
  (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
   | SEC_ALLOC | SEC_LOAD | SEC_RELOC),		/* section flags */
  0,				/* leading underscore */
  ' ',				/* 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,
    versados_object_p,		/* bfd_check_format */
    _bfd_dummy_target,
    _bfd_dummy_target,
  },
  {
    bfd_false,
    versados_mkobject,
    _bfd_generic_mkarchive,
    bfd_false,
  },
  {				/* bfd_write_contents */
    bfd_false,
    bfd_false,
    _bfd_write_archive_contents,
    bfd_false,
  },

  BFD_JUMP_TABLE_GENERIC (versados),
  BFD_JUMP_TABLE_COPY (_bfd_generic),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
  BFD_JUMP_TABLE_SYMBOLS (versados),
  BFD_JUMP_TABLE_RELOCS (versados),
  BFD_JUMP_TABLE_WRITE (versados),
  BFD_JUMP_TABLE_LINK (versados),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  (PTR) 0
};