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       1                 :            : /* Get return address register value for frame.
       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 "libdwflP.h"
      34                 :            : 
      35                 :            : bool
      36                 :        448 : dwfl_frame_pc (Dwfl_Frame *state, Dwarf_Addr *pc, bool *isactivation)
      37                 :            : {
      38         [ -  + ]:        448 :   assert (state->pc_state == DWFL_FRAME_STATE_PC_SET);
      39                 :        448 :   *pc = state->pc;
      40                 :        448 :   ebl_normalize_pc (state->thread->process->ebl, pc);
      41         [ +  + ]:        448 :   if (isactivation)
      42                 :            :     {
      43                 :            :       /* Bottom frame?  */
      44         [ +  + ]:        215 :       if (state->initial_frame)
      45                 :         43 :         *isactivation = true;
      46                 :            :       /* *ISACTIVATION is logical union of whether current or previous frame
      47                 :            :          state is SIGNAL_FRAME.  */
      48         [ -  + ]:        172 :       else if (state->signal_frame)
      49                 :          0 :         *isactivation = true;
      50                 :            :       else
      51                 :            :         {
      52                 :            :           /* If the previous frame has unwound unsuccessfully just silently do
      53                 :            :              not consider it could be a SIGNAL_FRAME.  */
      54                 :        172 :           __libdwfl_frame_unwind (state);
      55         [ +  + ]:        172 :           if (state->unwound == NULL
      56         [ +  + ]:        154 :               || state->unwound->pc_state != DWFL_FRAME_STATE_PC_SET)
      57                 :         36 :             *isactivation = false;
      58                 :            :           else
      59                 :        136 :             *isactivation = state->unwound->signal_frame;
      60                 :            :         }
      61                 :            :     }
      62                 :        448 :   return true;
      63                 :            : }
      64                 :            : INTDEF (dwfl_frame_pc)