Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 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) |