Line data    Source code

       1             : /* Check whether given DIE has specific attribute.
       2             :    Copyright (C) 2003, 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 <dwarf.h>
      35             : #include "libdwP.h"
      36             : 
      37             : 
      38             : int
      39    11570678 : dwarf_hasattr (Dwarf_Die *die, unsigned int search_name)
      40             : {
      41    11570678 :   if (die == NULL)
      42             :     return 0;
      43             : 
      44             :   /* Find the abbreviation entry.  */
      45    11570678 :   Dwarf_Abbrev *abbrevp = __libdw_dieabbrev (die, NULL);
      46    11570678 :   if (unlikely (abbrevp == DWARF_END_ABBREV))
      47             :     {
      48             :     invalid_dwarf:
      49           0 :       __libdw_seterrno (DWARF_E_INVALID_DWARF);
      50           0 :       return 0;
      51             :     }
      52             : 
      53    11570678 :   Dwarf *dbg = die->cu->dbg;
      54             : 
      55             :   /* Search the name attribute.  */
      56    11570678 :   unsigned char *const endp
      57    11570678 :     = ((unsigned char *) dbg->sectiondata[IDX_debug_abbrev]->d_buf
      58    11570678 :        + dbg->sectiondata[IDX_debug_abbrev]->d_size);
      59             : 
      60    11570678 :   const unsigned char *attrp = abbrevp->attrp;
      61             :   while (1)
      62             :     {
      63             :       /* Are we still in bounds?  This test needs to be refined.  */
      64    57166475 :       if (unlikely (attrp >= endp))
      65             :         goto invalid_dwarf;
      66             : 
      67             :       /* Get attribute name and form.  */
      68             :       unsigned int attr_name;
      69    57166475 :       get_uleb128 (attr_name, attrp, endp);
      70             :       unsigned int attr_form;
      71    57166475 :       if (unlikely (attrp >= endp))
      72             :         goto invalid_dwarf;
      73    57166475 :       get_uleb128 (attr_form, attrp, endp);
      74             : 
      75             :       /* We can stop if we found the attribute with value zero.  */
      76    57166475 :       if (attr_name == 0 || attr_form == 0)
      77             :         return 0;
      78             : 
      79    45615612 :       if (attr_name == search_name)
      80             :         return 1;
      81             :     }
      82             : }
      83             : INTDEF (dwarf_hasattr)