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       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                 :      39833 : dwarf_highpc (die, return_addr)
      40                 :            :      Dwarf_Die *die;
      41                 :            :      Dwarf_Addr *return_addr;
      42                 :            : {
      43                 :            :   Dwarf_Attribute attr_high_mem;
      44                 :      39833 :   Dwarf_Attribute *attr_high = INTUSE(dwarf_attr) (die, DW_AT_high_pc,
      45                 :            :                                                    &attr_high_mem);
      46         [ +  + ]:      39833 :   if (attr_high == NULL)
      47                 :            :     return -1;
      48                 :            : 
      49         [ +  + ]:      37734 :   if (attr_high->form == DW_FORM_addr)
      50                 :      37732 :     return INTUSE(dwarf_formaddr) (attr_high, return_addr);
      51                 :            : 
      52                 :            :   /* DWARF 4 allows high_pc to be a constant offset from low_pc. */
      53                 :            :   Dwarf_Attribute attr_low_mem;
      54         [ +  - ]:          2 :   if (INTUSE(dwarf_formaddr) (INTUSE(dwarf_attr) (die, DW_AT_low_pc,
      55                 :            :                                                   &attr_low_mem),
      56                 :            :                               return_addr) == 0)
      57                 :            :     {
      58                 :            :       Dwarf_Word uval;
      59         [ +  - ]:          2 :       if (INTUSE(dwarf_formudata) (attr_high, &uval) == 0)
      60                 :            :         {
      61                 :          2 :           *return_addr += uval;
      62                 :            :           return 0;
      63                 :            :         }
      64                 :      39833 :       __libdw_seterrno (DWARF_E_NO_ADDR);
      65                 :            :     }
      66                 :            :   return -1;
      67                 :            : }
      68                 :            : INTDEF(dwarf_highpc)