Line data    Source code

       1             : /* Return high PC attribute of DIE.
       2             :    Copyright (C) 2003, 2005, 2012, 2018 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             : 
      37             : int
      38      691598 : dwarf_highpc (Dwarf_Die *die, Dwarf_Addr *return_addr)
      39             : {
      40      691598 :   Dwarf_Attribute attr_high_mem;
      41      691598 :   Dwarf_Attribute *attr_high;
      42             :   /* Split compile DIEs inherit high_pc from their skeleton DIE.  */
      43      691598 :   if (is_cudie (die) && die->cu->unit_type == DW_UT_split_compile)
      44          14 :     attr_high = INTUSE(dwarf_attr_integrate) (die, DW_AT_high_pc,
      45             :                                               &attr_high_mem);
      46             :   else
      47      691584 :     attr_high = INTUSE(dwarf_attr) (die, DW_AT_high_pc, &attr_high_mem);
      48             : 
      49      691598 :   if (attr_high == NULL)
      50             :     goto no_addr;
      51             : 
      52       35242 :   if (INTUSE(dwarf_formaddr) (attr_high, return_addr) == 0)
      53             :     return 0;
      54             : 
      55             :   /* DWARF 4 allows high_pc to be a constant offset from low_pc. */
      56       34563 :   if (INTUSE(dwarf_lowpc) (die, return_addr) == 0)
      57             :     {
      58       34563 :       Dwarf_Word uval;
      59       34563 :       if (INTUSE(dwarf_formudata) (attr_high, &uval) == 0)
      60             :         {
      61       34563 :           *return_addr += uval;
      62       34563 :           return 0;
      63             :         }
      64             :     }
      65             : 
      66           0 : no_addr:
      67      656356 :   __libdw_seterrno (DWARF_E_NO_ADDR);
      68      656356 :   return -1;
      69             : }
      70             : INTDEF(dwarf_highpc)