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74bd2300 | 1 | /* __frame_state_for unwinder helper function wrapper. |
f7a9f785 | 2 | Copyright (C) 2001-2016 Free Software Foundation, Inc. |
74bd2300 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2001. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
74bd2300 UD |
19 | |
20 | #include <dlfcn.h> | |
21 | #include <stdlib.h> | |
f5bf21a7 | 22 | #define STATIC static |
74bd2300 UD |
23 | #define __frame_state_for fallback_frame_state_for |
24 | #include <unwind-dw2.c> | |
25 | #undef __frame_state_for | |
6e236b92 | 26 | #include <gnu/lib-names.h> |
74bd2300 UD |
27 | |
28 | typedef struct frame_state * (*framesf)(void *pc, struct frame_state *); | |
29 | struct frame_state *__frame_state_for (void *pc, | |
30 | struct frame_state *frame_state); | |
31 | ||
32 | struct frame_state * | |
33 | __frame_state_for (void *pc, struct frame_state *frame_state) | |
34 | { | |
35 | static framesf frame_state_for; | |
36 | ||
37 | if (frame_state_for == NULL) | |
38 | { | |
13f6812f | 39 | void *handle = __libc_dlopen (LIBGCC_S_SO); |
74bd2300 UD |
40 | |
41 | if (handle == NULL | |
42 | || (frame_state_for | |
43 | = (framesf) __libc_dlsym (handle, "__frame_state_for")) == NULL) | |
d7cc1c9f | 44 | #ifndef __USING_SJLJ_EXCEPTIONS__ |
74bd2300 | 45 | frame_state_for = fallback_frame_state_for; |
d7cc1c9f | 46 | #else |
350635a5 | 47 | frame_state_for = abort; |
d7cc1c9f | 48 | #endif |
74bd2300 UD |
49 | } |
50 | ||
51 | return frame_state_for (pc, frame_state); | |
52 | } |