| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2003-2015 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 | #include <sysdep.h> |
| 24 | #include <unwind-resume.h> |
| 25 | |
| 26 | |
| 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) |
| 34 | { |
| 35 | void *resume, *personality; |
| 36 | void *handle; |
| 37 | |
| 38 | handle = __libc_dlopen (LIBGCC_S_SO); |
| 39 | |
| 40 | if (handle == NULL |
| 41 | || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL |
| 42 | || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL) |
| 43 | __libc_fatal (LIBGCC_S_SO |
| 44 | " must be installed for pthread_cancel to work\n"); |
| 45 | |
| 46 | #ifdef PTR_MANGLE |
| 47 | PTR_MANGLE (resume); |
| 48 | #endif |
| 49 | __libgcc_s_resume = resume; |
| 50 | #ifdef PTR_MANGLE |
| 51 | PTR_MANGLE (personality); |
| 52 | #endif |
| 53 | libgcc_s_personality = personality; |
| 54 | } |
| 55 | |
| 56 | #if !HAVE_ARCH_UNWIND_RESUME |
| 57 | void |
| 58 | _Unwind_Resume (struct _Unwind_Exception *exc) |
| 59 | { |
| 60 | if (__glibc_unlikely (__libgcc_s_resume == NULL)) |
| 61 | __libgcc_s_init (); |
| 62 | |
| 63 | __typeof (__libgcc_s_resume) resume = __libgcc_s_resume; |
| 64 | #ifdef PTR_DEMANGLE |
| 65 | PTR_DEMANGLE (resume); |
| 66 | #endif |
| 67 | (*resume) (exc); |
| 68 | } |
| 69 | #endif |
| 70 | |
| 71 | _Unwind_Reason_Code |
| 72 | __gcc_personality_v0 PERSONALITY_PROTO |
| 73 | { |
| 74 | if (__glibc_unlikely (libgcc_s_personality == NULL)) |
| 75 | __libgcc_s_init (); |
| 76 | |
| 77 | __typeof (libgcc_s_personality) personality = libgcc_s_personality; |
| 78 | #ifdef PTR_DEMANGLE |
| 79 | PTR_DEMANGLE (personality); |
| 80 | #endif |
| 81 | return (*personality) PERSONALITY_ARGS; |
| 82 | } |