Line data    Source code

       1             : /* Get specific attribute of abbreviation.
       2             :    Copyright (C) 2003, 2004, 2005, 2014, 2017 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      451243 : dwarf_getabbrevattr_data (Dwarf_Abbrev *abbrev, size_t idx,
      41             :                           unsigned int *namep, unsigned int *formp,
      42             :                           Dwarf_Sword *datap, Dwarf_Off *offsetp)
      43             : {
      44      451243 :   if (abbrev == NULL)
      45             :     return -1;
      46             : 
      47      451243 :   size_t cnt = 0;
      48      451243 :   const unsigned char *attrp = abbrev->attrp;
      49     1750592 :   const unsigned char *start_attrp;
      50     1750592 :   unsigned int name;
      51     1750592 :   unsigned int form;
      52     1750592 :   Dwarf_Word data;
      53             : 
      54     1750592 :   do
      55             :     {
      56     1750592 :       start_attrp = attrp;
      57             : 
      58             :       /* Attribute code and form are encoded as ULEB128 values.
      59             :          Already checked when Dwarf_Abbrev was created, read unchecked.  */
      60     1750592 :       get_uleb128_unchecked (name, attrp);
      61     1750592 :       get_uleb128_unchecked (form, attrp);
      62             : 
      63     1750592 :       if (form == DW_FORM_implicit_const)
      64           0 :         get_sleb128_unchecked (data, attrp);
      65             :       else
      66             :         data = 0;
      67             : 
      68             :       /* If both values are zero the index is out of range.  */
      69     1750592 :       if (name == 0 && form == 0)
      70             :         return -1;
      71             :     }
      72     1669071 :   while (cnt++ < idx);
      73             : 
      74             :   /* Store the result if requested.  */
      75      369722 :   if (namep != NULL)
      76      369722 :     *namep = name;
      77      369722 :   if (formp != NULL)
      78      369722 :     *formp = form;
      79      369722 :   if (datap != NULL)
      80      369459 :     *datap = data;
      81      369722 :   if (offsetp != NULL)
      82      369722 :     *offsetp = (start_attrp - abbrev->attrp) + abbrev->offset;
      83             : 
      84             :   return 0;
      85             : }
      86             : INTDEF(dwarf_getabbrevattr_data)
      87             : 
      88             : int
      89         263 : dwarf_getabbrevattr (Dwarf_Abbrev *abbrev, size_t idx, unsigned int *namep,
      90             :                      unsigned int *formp, Dwarf_Off *offsetp)
      91             : {
      92         263 :   return INTUSE(dwarf_getabbrevattr_data) (abbrev, idx, namep, formp,
      93             :                                            NULL, offsetp);
      94             : }