Line data    Source code

       1             : /* Return high PC attribute of DIE.
       2             :    Copyright (C) 2003, 2005, 2012 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       23568 : dwarf_highpc (Dwarf_Die *die, Dwarf_Addr *return_addr)
      40             : {
      41             :   Dwarf_Attribute attr_high_mem;
      42       23568 :   Dwarf_Attribute *attr_high = INTUSE(dwarf_attr) (die, DW_AT_high_pc,
      43             :                                                    &attr_high_mem);
      44       23568 :   if (attr_high == NULL)
      45             :     return -1;
      46             : 
      47       22320 :   if (attr_high->form == DW_FORM_addr)
      48         667 :     return INTUSE(dwarf_formaddr) (attr_high, return_addr);
      49             : 
      50             :   /* DWARF 4 allows high_pc to be a constant offset from low_pc. */
      51             :   Dwarf_Attribute attr_low_mem;
      52       21653 :   if (INTUSE(dwarf_formaddr) (INTUSE(dwarf_attr) (die, DW_AT_low_pc,
      53             :                                                   &attr_low_mem),
      54             :                               return_addr) == 0)
      55             :     {
      56             :       Dwarf_Word uval;
      57       21653 :       if (INTUSE(dwarf_formudata) (attr_high, &uval) == 0)
      58             :         {
      59       21653 :           *return_addr += uval;
      60       21653 :           return 0;
      61             :         }
      62           0 :       __libdw_seterrno (DWARF_E_NO_ADDR);
      63             :     }
      64             :   return -1;
      65             : }
      66             : INTDEF(dwarf_highpc)