xref: /external/elfutils/libdw/dwarf_diecu.c

/* Return CU DIE containing given DIE.
   Copyright (C) 2005-2010 Red Hat, Inc.
   This file is part of Red Hat elfutils.

   Red Hat elfutils 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; version 2 of the License.

   Red Hat elfutils 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 Red Hat elfutils; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.

   In addition, as a special exception, Red Hat, Inc. gives You the
   additional right to link the code of Red Hat elfutils with code licensed
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   code used in conjunction with Red Hat elfutils except the Non-GPL Code
   covered by this exception.  If you modify this file, you may extend this
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   this file solely under the GPL without exception.

   Red Hat elfutils is an included package of the Open Invention Network.
   An included package of the Open Invention Network is a package for which
   Open Invention Network licensees cross-license their patents.  No patent
   license is granted, either expressly or impliedly, by designation as an
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <string.h>
#include "libdwP.h"


Dwarf_Die *
dwarf_diecu (die, result, address_sizep, offset_sizep)
     Dwarf_Die *die;
     Dwarf_Die *result;
     uint8_t *address_sizep;
     uint8_t *offset_sizep;
{
  if (die == NULL)
    return NULL;

  /* Clear the entire DIE structure.  This signals we have not yet
     determined any of the information.  */
  memset (result, '\0', sizeof (Dwarf_Die));

  result->addr = ((char *) die->cu->dbg->sectiondata[IDX_debug_info]->d_buf
 		  + DIE_OFFSET_FROM_CU_OFFSET (die->cu->start,
					       die->cu->offset_size,
					       die->cu->type_offset != 0));
  result->cu = die->cu;

  if (address_sizep != NULL)
    *address_sizep = die->cu->address_size;
  if (offset_sizep != NULL)
    *offset_sizep = die->cu->offset_size;

  return result;
}