Line data    Source code

       1             : /* Get specific attribute of abbreviation.
       2             :    Copyright (C) 2003, 2004, 2005, 2014 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 2003.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include <assert.h>
      35             : #include <dwarf.h>
      36             : #include "libdwP.h"
      37             : 
      38             : 
      39             : int
      40      308999 : dwarf_getabbrevattr (Dwarf_Abbrev *abbrev, size_t idx, unsigned int *namep,
      41             :                      unsigned int *formp, Dwarf_Off *offsetp)
      42             : {
      43      308999 :   if (abbrev == NULL)
      44             :     return -1;
      45             : 
      46      308999 :   size_t cnt = 0;
      47      308999 :   const unsigned char *attrp = abbrev->attrp;
      48             :   const unsigned char *start_attrp;
      49             :   unsigned int name;
      50             :   unsigned int form;
      51             : 
      52             :   do
      53             :     {
      54     1047057 :       start_attrp = attrp;
      55             : 
      56             :       /* Attribute code and form are encoded as ULEB128 values.i
      57             :          XXX We have no way to bounds check.  */
      58     1047057 :       get_uleb128 (name, attrp, attrp + len_leb128 (name));
      59     1047057 :       get_uleb128 (form, attrp, attrp + len_leb128 (form));
      60             : 
      61             :       /* If both values are zero the index is out of range.  */
      62     1047057 :       if (name == 0 && form == 0)
      63             :         return -1;
      64             :     }
      65      982838 :   while (cnt++ < idx);
      66             : 
      67             :   /* Store the result if requested.  */
      68      244780 :   if (namep != NULL)
      69      244780 :     *namep = name;
      70      244780 :   if (formp != NULL)
      71      244780 :     *formp = form;
      72      244780 :   if (offsetp != NULL)
      73      244780 :     *offsetp = (start_attrp - abbrev->attrp) + abbrev->offset;
      74             : 
      75             :   return 0;
      76             : }