Line data    Source code

       1             : /* Return DIE associated with a location expression op.
       2             :    Copyright (C) 2013 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             : 
       5             :    This file is free software; you can redistribute it and/or modify
       6             :    it under the terms of either
       7             : 
       8             :      * the GNU Lesser General Public License as published by the Free
       9             :        Software Foundation; either version 3 of the License, or (at
      10             :        your option) any later version
      11             : 
      12             :    or
      13             : 
      14             :      * the GNU General Public License as published by the Free
      15             :        Software Foundation; either version 2 of the License, or (at
      16             :        your option) any later version
      17             : 
      18             :    or both in parallel, as here.
      19             : 
      20             :    elfutils is distributed in the hope that it will be useful, but
      21             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      22             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      23             :    General Public License for more details.
      24             : 
      25             :    You should have received copies of the GNU General Public License and
      26             :    the GNU Lesser General Public License along with this program.  If
      27             :    not, see <http://www.gnu.org/licenses/>.  */
      28             : 
      29             : #ifdef HAVE_CONFIG_H
      30             : # include <config.h>
      31             : #endif
      32             : 
      33             : #include <dwarf.h>
      34             : #include <libdwP.h>
      35             : 
      36             : int
      37           7 : dwarf_getlocation_die (Dwarf_Attribute *attr, const Dwarf_Op *op,
      38             :                        Dwarf_Die *result)
      39             : {
      40           7 :   if (attr == NULL)
      41             :     return -1;
      42             : 
      43             :   Dwarf_Off dieoff;
      44           7 :   switch (op->atom)
      45             :     {
      46             :     case DW_OP_GNU_implicit_pointer:
      47             :     case DW_OP_call_ref:
      48           2 :       dieoff = op->number;
      49           2 :       break;
      50             : 
      51             :     case DW_OP_GNU_parameter_ref:
      52             :     case DW_OP_GNU_convert:
      53             :     case DW_OP_GNU_reinterpret:
      54             :     case DW_OP_GNU_const_type:
      55             :     case DW_OP_call2:
      56             :     case DW_OP_call4:
      57           4 :       dieoff = attr->cu->start + op->number;
      58           4 :       break;
      59             : 
      60             :     case DW_OP_GNU_regval_type:
      61             :     case DW_OP_GNU_deref_type:
      62           1 :       dieoff = attr->cu->start + op->number2;
      63           1 :       break;
      64             : 
      65             :     default:
      66           0 :       __libdw_seterrno (DWARF_E_INVALID_ACCESS);
      67           0 :       return -1;
      68             :     }
      69             : 
      70           7 :   if (__libdw_offdie (attr->cu->dbg, dieoff, result,
      71           7 :                      attr->cu->type_offset != 0) == NULL)
      72             :     return -1;
      73             : 
      74           7 :   return 0;
      75             : }
      76             : INTDEF(dwarf_getlocation_die);