srec.c

来自「基于4个mips核的noc设计」· C语言 代码 · 共 1,379 行 · 第 1/3 页

}

/* Write a record of type, of the supplied number of bytes. The
   supplied bytes and length don't have a checksum. That's worked out
   here.  */

static boolean
srec_write_record (abfd, type, address, data, end)
     bfd *abfd;
     int type;
     bfd_vma address;
     const bfd_byte *data;
     const bfd_byte *end;
{
  char buffer[MAXCHUNK];
  unsigned int check_sum = 0;
  CONST bfd_byte *src = data;
  char *dst = buffer;
  char *length;
  bfd_size_type wrlen;

  *dst++ = 'S';
  *dst++ = '0' + type;

  length = dst;
  dst += 2;			/* Leave room for dst.  */

  switch (type)
    {
    case 3:
    case 7:
      TOHEX (dst, (address >> 24), check_sum);
      dst += 2;
    case 8:
    case 2:
      TOHEX (dst, (address >> 16), check_sum);
      dst += 2;
    case 9:
    case 1:
    case 0:
      TOHEX (dst, (address >> 8), check_sum);
      dst += 2;
      TOHEX (dst, (address), check_sum);
      dst += 2;
      break;

    }
  for (src = data; src < end; src++)
    {
      TOHEX (dst, *src, check_sum);
      dst += 2;
    }

  /* Fill in the length.  */
  TOHEX (length, (dst - length) / 2, check_sum);
  check_sum &= 0xff;
  check_sum = 255 - check_sum;
  TOHEX (dst, check_sum, check_sum);
  dst += 2;

  *dst++ = '\r';
  *dst++ = '\n';
  wrlen = dst - buffer;
  if (bfd_write ((PTR) buffer, 1, wrlen, abfd) != wrlen)
    return false;
  return true;
}

static boolean
srec_write_header (abfd)
     bfd *abfd;
{
  bfd_byte buffer[MAXCHUNK];
  bfd_byte *dst = buffer;
  unsigned int i;

  /* I'll put an arbitary 40 char limit on header size.  */
  for (i = 0; i < 40 && abfd->filename[i]; i++)
    *dst++ = abfd->filename[i];

  return srec_write_record (abfd, 0, 0, buffer, dst);
}

static boolean
srec_write_section (abfd, tdata, list)
     bfd *abfd;
     tdata_type *tdata;
     srec_data_list_type *list;
{
  unsigned int octets_written = 0;
  bfd_byte *location = list->data;

  while (octets_written < list->size)
    {
      bfd_vma address;
      unsigned int octets_this_chunk = list->size - octets_written;

      if (octets_this_chunk > Chunk)
	octets_this_chunk = Chunk;

      address = list->where + octets_written / bfd_octets_per_byte (abfd);

      if (! srec_write_record (abfd,
			       tdata->type,
			       address,
			       location,
			       location + octets_this_chunk))
	return false;

      octets_written += octets_this_chunk;
      location += octets_this_chunk;
    }

  return true;
}

static boolean
srec_write_terminator (abfd, tdata)
     bfd *abfd;
     tdata_type *tdata;
{
  bfd_byte buffer[2];

  return srec_write_record (abfd, 10 - tdata->type,
			    abfd->start_address, buffer, buffer);
}

static boolean
srec_write_symbols (abfd)
     bfd *abfd;
{
  char buffer[MAXCHUNK];
  /* Dump out the symbols of a bfd.  */
  int i;
  int count = bfd_get_symcount (abfd);

  if (count)
    {
      size_t len;
      asymbol **table = bfd_get_outsymbols (abfd);
      sprintf (buffer, "$$ %s\r\n", abfd->filename);

      len = strlen (buffer);
      if (bfd_write (buffer, len, 1, abfd) != len)
	return false;

      for (i = 0; i < count; i++)
	{
	  asymbol *s = table[i];
	  if (! bfd_is_local_label (abfd, s)
	      && (s->flags & BSF_DEBUGGING) == 0)
	    {
	      /* Just dump out non debug symbols.  */
	      bfd_size_type l;
	      char buf2[40], *p;

	      sprintf_vma (buf2,
			   s->value + s->section->output_section->lma
			   + s->section->output_offset);
	      p = buf2;
	      while (p[0] == '0' && p[1] != 0)
		p++;
	      sprintf (buffer, "  %s $%s\r\n", s->name, p);
	      l = strlen (buffer);
	      if (bfd_write (buffer, l, 1, abfd) != l)
		return false;
	    }
	}
      sprintf (buffer, "$$ \r\n");
      len = strlen (buffer);
      if (bfd_write (buffer, len, 1, abfd) != len)
	return false;
    }

  return true;
}

static boolean
internal_srec_write_object_contents (abfd, symbols)
     bfd *abfd;
     int symbols;
{
  tdata_type *tdata = abfd->tdata.srec_data;
  srec_data_list_type *list;

  if (symbols)
    {
      if (! srec_write_symbols (abfd))
	return false;
    }

  if (! srec_write_header (abfd))
    return false;

  /* Now wander though all the sections provided and output them.  */
  list = tdata->head;

  while (list != (srec_data_list_type *) NULL)
    {
      if (! srec_write_section (abfd, tdata, list))
	return false;
      list = list->next;
    }
  return srec_write_terminator (abfd, tdata);
}

static boolean
srec_write_object_contents (abfd)
     bfd *abfd;
{
  return internal_srec_write_object_contents (abfd, 0);
}

static boolean
symbolsrec_write_object_contents (abfd)
     bfd *abfd;
{
  return internal_srec_write_object_contents (abfd, 1);
}

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

static asymbol *
srec_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
srec_get_symtab_upper_bound (abfd)
     bfd *abfd;
{
  return (bfd_get_symcount (abfd) + 1) * sizeof (asymbol *);
}

/* Return the symbol table.  */

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

  csymbols = abfd->tdata.srec_data->csymbols;
  if (csymbols == NULL)
    {
      asymbol *c;
      struct srec_symbol *s;

      csymbols = (asymbol *) bfd_alloc (abfd, symcount * sizeof (asymbol));
      if (csymbols == NULL && symcount != 0)
	return false;
      abfd->tdata.srec_data->csymbols = csymbols;

      for (s = abfd->tdata.srec_data->symbols, c = csymbols;
	   s != NULL;
	   s = s->next, ++c)
	{
	  c->the_bfd = abfd;
	  c->name = s->name;
	  c->value = s->val;
	  c->flags = BSF_GLOBAL;
	  c->section = bfd_abs_section_ptr;
	  c->udata.p = NULL;
	}
    }

  for (i = 0; i < symcount; i++)
    *alocation++ = csymbols++;
  *alocation = NULL;

  return symcount;
}

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

static void
srec_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);

    }
}

#define	srec_close_and_cleanup _bfd_generic_close_and_cleanup
#define srec_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
#define srec_new_section_hook _bfd_generic_new_section_hook

#define srec_bfd_is_local_label_name bfd_generic_is_local_label_name
#define srec_get_lineno _bfd_nosymbols_get_lineno
#define srec_find_nearest_line _bfd_nosymbols_find_nearest_line
#define srec_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
#define srec_read_minisymbols _bfd_generic_read_minisymbols
#define srec_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol

#define srec_get_reloc_upper_bound \
  ((long (*) PARAMS ((bfd *, asection *))) bfd_0l)
#define srec_canonicalize_reloc \
  ((long (*) PARAMS ((bfd *, asection *, arelent **, asymbol **))) bfd_0l)
#define srec_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup

#define srec_get_section_contents_in_window \
  _bfd_generic_get_section_contents_in_window

#define srec_bfd_get_relocated_section_contents \
  bfd_generic_get_relocated_section_contents
#define srec_bfd_relax_section bfd_generic_relax_section
#define srec_bfd_gc_sections bfd_generic_gc_sections
#define srec_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#define srec_bfd_link_add_symbols _bfd_generic_link_add_symbols
#define srec_bfd_final_link _bfd_generic_final_link
#define srec_bfd_link_split_section _bfd_generic_link_split_section

const bfd_target srec_vec =
{
  "srec",			/* name */
  bfd_target_srec_flavour,
  BFD_ENDIAN_UNKNOWN,		/* target byte order */
  BFD_ENDIAN_UNKNOWN,		/* 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,
    srec_object_p,		/* bfd_check_format */
    _bfd_dummy_target,
    _bfd_dummy_target,
  },
  {
    bfd_false,
    srec_mkobject,
    _bfd_generic_mkarchive,
    bfd_false,
  },
  {				/* bfd_write_contents */
    bfd_false,
    srec_write_object_contents,
    _bfd_write_archive_contents,
    bfd_false,
  },

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

  NULL,

  (PTR) 0
};

const bfd_target symbolsrec_vec =
{
  "symbolsrec",			/* name */
  bfd_target_srec_flavour,
  BFD_ENDIAN_UNKNOWN,		/* target byte order */
  BFD_ENDIAN_UNKNOWN,		/* 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,
    symbolsrec_object_p,	/* bfd_check_format */
    _bfd_dummy_target,
    _bfd_dummy_target,
  },
  {
    bfd_false,
    srec_mkobject,
    _bfd_generic_mkarchive,
    bfd_false,
  },
  {				/* bfd_write_contents */
    bfd_false,
    symbolsrec_write_object_contents,
    _bfd_write_archive_contents,
    bfd_false,
  },

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

  NULL,

  (PTR) 0
};