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 dwfl_frame_pc (Dwfl_Frame *state, Dwarf_Addr *pc, bool *isactivation) 37 { 38 assert (state->pc_state == DWFL_FRAME_STATE_PC_SET); 39 *pc = state->pc; 40 ebl_normalize_pc (state->thread->process->ebl, pc); 41 if (isactivation) 42 { 43 /* Bottom frame? */ 44 if (state->initial_frame) 45 *isactivation = true; 46 /* *ISACTIVATION is logical union of whether current or previous frame 47 state is SIGNAL_FRAME. */ 48 else if (state->signal_frame) 49 *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 __libdwfl_frame_unwind (state); 55 if (state->unwound == NULL 56 || state->unwound->pc_state != DWFL_FRAME_STATE_PC_SET) 57 *isactivation = false; 58 else 59 *isactivation = state->unwound->signal_frame; 60 } 61 } 62 return true; 63 } 64 INTDEF (dwfl_frame_pc) 65
