Branch data     Line data    Source code

       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                 :         896 : dwfl_frame_pc (Dwfl_Frame *state, Dwarf_Addr *pc, bool *isactivation)
      37                 :             : {
      38         [ -  + ]:         896 :   assert (state->pc_state == DWFL_FRAME_STATE_PC_SET);
      39                 :         896 :   *pc = state->pc;
      40                 :         896 :   ebl_normalize_pc (state->thread->process->ebl, pc);
      41         [ +  + ]:         896 :   if (isactivation)
      42                 :             :     {
      43                 :             :       /* Bottom frame?  */
      44         [ +  + ]:         430 :       if (state->initial_frame)
      45                 :          86 :         *isactivation = true;
      46                 :             :       /* *ISACTIVATION is logical union of whether current or previous frame
      47                 :             :          state is SIGNAL_FRAME.  */
      48         [ -  + ]:         344 :       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                 :         344 :           __libdwfl_frame_unwind (state);
      55         [ +  + ]:         344 :           if (state->unwound == NULL
      56         [ +  + ]:         308 :               || state->unwound->pc_state != DWFL_FRAME_STATE_PC_SET)
      57                 :          70 :             *isactivation = false;
      58                 :             :           else
      59                 :         274 :             *isactivation = state->unwound->signal_frame;
      60                 :             :         }
      61                 :             :     }
      62                 :         896 :   return true;
      63                 :             : }
      64                 :             : INTDEF (dwfl_frame_pc)