| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2003 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 not, |
| 17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 18 | Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include <dlfcn.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <unwind.h> |
| 24 | #include <libgcc_s.h> |
| 25 | |
| 26 | #define __libc_dlopen(x) dlopen(x, (RTLD_LOCAL | RTLD_LAZY)) |
| 27 | #define __libc_dlsym dlsym |
| 28 | #define __libc_dlclose dlclose |
| 29 | |
| 30 | static void (*libgcc_s_resume) (struct _Unwind_Exception *exc); |
| 31 | static _Unwind_Reason_Code (*libgcc_s_personality) |
| 32 | (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *, |
| 33 | struct _Unwind_Context *); |
| 34 | |
| 35 | extern |
| 36 | void abort(void); |
| 37 | |
| 38 | static void |
| 39 | init (void) |
| 40 | { |
| 41 | void *resume, *personality; |
| 42 | void *handle; |
| 43 | resume = personality = NULL; |
| 44 | handle = dlopen (LIBGCC_S_SO, (RTLD_LOCAL | RTLD_LAZY)); |
| 45 | |
| 46 | if (handle == NULL |
| 47 | || (resume = dlsym (handle, "_Unwind_Resume")) == NULL |
| 48 | || (personality = dlsym (handle, "__gcc_personality_v0")) == NULL) |
| 49 | { |
| 50 | printf (LIBGCC_S_SO " must be installed for pthread_cancel to work\n"); |
| 51 | abort(); |
| 52 | } |
| 53 | |
| 54 | libgcc_s_resume = resume; |
| 55 | libgcc_s_personality = personality; |
| 56 | } |
| 57 | |
| 58 | void |
| 59 | _Unwind_Resume (struct _Unwind_Exception *exc) |
| 60 | { |
| 61 | if (__builtin_expect (libgcc_s_resume == NULL, 0)) |
| 62 | init (); |
| 63 | libgcc_s_resume (exc); |
| 64 | } |
| 65 | |
| 66 | _Unwind_Reason_Code |
| 67 | __gcc_personality_v0 (int version, _Unwind_Action actions, |
| 68 | _Unwind_Exception_Class exception_class, |
| 69 | struct _Unwind_Exception *ue_header, |
| 70 | struct _Unwind_Context *context) |
| 71 | { |
| 72 | if (__builtin_expect (libgcc_s_personality == NULL, 0)) |
| 73 | init (); |
| 74 | return libgcc_s_personality (version, actions, exception_class, |
| 75 | ue_header, context); |
| 76 | } |