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1 | /* Copyright (C) 2003-2014 Free Software Foundation, Inc. | |
2 | This file is part of the GNU C Library. | |
3 | Contributed by Jakub Jelinek <jakub@redhat.com>. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If | |
17 | not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <dlfcn.h> | |
20 | #include <stdio.h> | |
21 | #include <unwind.h> | |
22 | #include <gnu/lib-names.h> | |
23 | ||
24 | static void (*libgcc_s_resume) (struct _Unwind_Exception *exc); | |
25 | static _Unwind_Reason_Code (*libgcc_s_personality) | |
26 | (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *, | |
27 | struct _Unwind_Context *); | |
28 | ||
29 | static void | |
30 | init (void) | |
31 | { | |
32 | void *resume, *personality; | |
33 | void *handle; | |
34 | ||
35 | handle = __libc_dlopen (LIBGCC_S_SO); | |
36 | ||
37 | if (handle == NULL | |
38 | || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL | |
39 | || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL) | |
40 | __libc_fatal (LIBGCC_S_SO " must be installed for pthread_cancel to work\n"); | |
41 | ||
42 | libgcc_s_resume = resume; | |
43 | libgcc_s_personality = personality; | |
44 | } | |
45 | ||
46 | void | |
47 | _Unwind_Resume (struct _Unwind_Exception *exc) | |
48 | { | |
49 | if (__builtin_expect (libgcc_s_resume == NULL, 0)) | |
50 | init (); | |
51 | libgcc_s_resume (exc); | |
52 | } | |
53 | ||
54 | _Unwind_Reason_Code | |
55 | __gcc_personality_v0 (int version, _Unwind_Action actions, | |
56 | _Unwind_Exception_Class exception_class, | |
57 | struct _Unwind_Exception *ue_header, | |
58 | struct _Unwind_Context *context) | |
59 | { | |
60 | if (__builtin_expect (libgcc_s_personality == NULL, 0)) | |
61 | init (); | |
62 | return libgcc_s_personality (version, actions, exception_class, | |
63 | ue_header, context); | |
64 | } |