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04277e02 | 1 | /* Copyright (C) 2003-2019 Free Software Foundation, Inc. |
9d79e037 UD |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
5a82c748 | 17 | not, see <https://www.gnu.org/licenses/>. */ |
9d79e037 UD |
18 | |
19 | #include <dlfcn.h> | |
20 | #include <stdio.h> | |
21 | #include <unwind.h> | |
6e236b92 | 22 | #include <gnu/lib-names.h> |
3eb5d2fc | 23 | #include <sysdep.h> |
46abb64d | 24 | #include <unwind-resume.h> |
9d79e037 | 25 | |
9d79e037 | 26 | |
46abb64d RM |
27 | void (*__libgcc_s_resume) (struct _Unwind_Exception *exc) |
28 | attribute_hidden __attribute__ ((noreturn)); | |
29 | ||
30 | static _Unwind_Reason_Code (*libgcc_s_personality) PERSONALITY_PROTO; | |
31 | ||
32 | void attribute_hidden __attribute__ ((cold)) | |
33 | __libgcc_s_init (void) | |
9d79e037 UD |
34 | { |
35 | void *resume, *personality; | |
36 | void *handle; | |
37 | ||
81b49e96 TMQMF |
38 | /* See include/dlfcn.h. Use of __libc_dlopen requires RTLD_NOW. */ |
39 | handle = __libc_dlopen (LIBGCC_S_SO); | |
9d79e037 UD |
40 | |
41 | if (handle == NULL | |
42 | || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL | |
43 | || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL) | |
55d4d550 | 44 | __libc_fatal (LIBGCC_S_SO |
08c6e952 | 45 | " must be installed for unwinding to work\n"); |
9d79e037 | 46 | |
28b06757 | 47 | #ifdef PTR_MANGLE |
3eb5d2fc | 48 | PTR_MANGLE (resume); |
28b06757 | 49 | #endif |
46abb64d | 50 | __libgcc_s_resume = resume; |
28b06757 | 51 | #ifdef PTR_MANGLE |
3eb5d2fc | 52 | PTR_MANGLE (personality); |
28b06757 | 53 | #endif |
9d79e037 UD |
54 | libgcc_s_personality = personality; |
55 | } | |
56 | ||
46abb64d | 57 | #if !HAVE_ARCH_UNWIND_RESUME |
9d79e037 UD |
58 | void |
59 | _Unwind_Resume (struct _Unwind_Exception *exc) | |
60 | { | |
46abb64d RM |
61 | if (__glibc_unlikely (__libgcc_s_resume == NULL)) |
62 | __libgcc_s_init (); | |
3eb5d2fc | 63 | |
46abb64d | 64 | __typeof (__libgcc_s_resume) resume = __libgcc_s_resume; |
ff782688 | 65 | #ifdef PTR_DEMANGLE |
3eb5d2fc | 66 | PTR_DEMANGLE (resume); |
ff782688 | 67 | #endif |
3eb5d2fc | 68 | (*resume) (exc); |
9d79e037 | 69 | } |
46abb64d | 70 | #endif |
9d79e037 UD |
71 | |
72 | _Unwind_Reason_Code | |
46abb64d | 73 | __gcc_personality_v0 PERSONALITY_PROTO |
9d79e037 | 74 | { |
a1ffb40e | 75 | if (__glibc_unlikely (libgcc_s_personality == NULL)) |
46abb64d | 76 | __libgcc_s_init (); |
3eb5d2fc RM |
77 | |
78 | __typeof (libgcc_s_personality) personality = libgcc_s_personality; | |
ff782688 | 79 | #ifdef PTR_DEMANGLE |
3eb5d2fc | 80 | PTR_DEMANGLE (personality); |
ff782688 | 81 | #endif |
46abb64d | 82 | return (*personality) PERSONALITY_ARGS; |
9d79e037 | 83 | } |