Line data    Source code

       1             : /* Return DIE at given offset.
       2             :    Copyright (C) 2002-2010 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 2002.
       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 <string.h>
      35             : #include "libdwP.h"
      36             : 
      37             : 
      38             : Dwarf_Die *
      39             : internal_function
      40      115851 : __libdw_offdie (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result,
      41             :                 bool debug_types)
      42             : {
      43      115851 :   if (dbg == NULL)
      44             :     return NULL;
      45             : 
      46      115851 :   Elf_Data *const data = dbg->sectiondata[debug_types ? IDX_debug_types
      47      115851 :                                           : IDX_debug_info];
      48      115851 :   if (offset >= data->d_size)
      49             :     {
      50           0 :       __libdw_seterrno (DWARF_E_INVALID_DWARF);
      51           0 :       return NULL;
      52             :     }
      53             : 
      54             :   /* Clear the entire DIE structure.  This signals we have not yet
      55             :      determined any of the information.  */
      56      115851 :   memset (result, '\0', sizeof (Dwarf_Die));
      57             : 
      58      115851 :   result->addr = (char *) data->d_buf + offset;
      59             : 
      60             :   /* Get the CU.  */
      61      115851 :   result->cu = __libdw_findcu (dbg, offset, debug_types);
      62      115851 :   if (result->cu == NULL)
      63             :     {
      64             :       /* This should never happen.  The input file is malformed.  */
      65           0 :       __libdw_seterrno (DWARF_E_INVALID_DWARF);
      66           0 :       result = NULL;
      67             :     }
      68             : 
      69             :   return result;
      70             : }
      71             : 
      72             : 
      73             : Dwarf_Die *
      74      115839 : dwarf_offdie (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result)
      75             : {
      76      115839 :   return __libdw_offdie (dbg, offset, result, false);
      77             : }
      78             : INTDEF(dwarf_offdie)
      79             : 
      80             : Dwarf_Die *
      81           4 : dwarf_offdie_types (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result)
      82             : {
      83           4 :   return __libdw_offdie (dbg, offset, result, true);
      84             : }