| /* Copyright (C) 2003-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Jakub Jelinek <jakub@redhat.com>. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public License as |
| published by the Free Software Foundation; either version 2.1 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If |
| not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include <dlfcn.h> |
| #include <stdio.h> |
| #include <unwind.h> |
| #include <gnu/lib-names.h> |
| #include <sysdep.h> |
| #include <unwind-resume.h> |
| |
| |
| void (*__libgcc_s_resume) (struct _Unwind_Exception *exc) |
| attribute_hidden __attribute__ ((noreturn)); |
| |
| static _Unwind_Reason_Code (*libgcc_s_personality) PERSONALITY_PROTO; |
| |
| void attribute_hidden __attribute__ ((cold)) |
| __libgcc_s_init (void) |
| { |
| void *resume, *personality; |
| void *handle; |
| |
| /* Use RTLD_NOW here for consistency with pthread_cancel_init. |
| RTLD_NOW will rarely make a difference here because unwinding is |
| already in progress, so libgcc_s.so has already been loaded if |
| its unwinder is used. */ |
| handle = __libc_dlopen_mode (LIBGCC_S_SO, RTLD_NOW | __RTLD_DLOPEN); |
| |
| if (handle == NULL |
| || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL |
| || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL) |
| __libc_fatal (LIBGCC_S_SO |
| " must be installed for unwinding to work\n"); |
| |
| #ifdef PTR_MANGLE |
| PTR_MANGLE (resume); |
| #endif |
| __libgcc_s_resume = resume; |
| #ifdef PTR_MANGLE |
| PTR_MANGLE (personality); |
| #endif |
| libgcc_s_personality = personality; |
| } |
| |
| #if !HAVE_ARCH_UNWIND_RESUME |
| void |
| _Unwind_Resume (struct _Unwind_Exception *exc) |
| { |
| if (__glibc_unlikely (__libgcc_s_resume == NULL)) |
| __libgcc_s_init (); |
| |
| __typeof (__libgcc_s_resume) resume = __libgcc_s_resume; |
| #ifdef PTR_DEMANGLE |
| PTR_DEMANGLE (resume); |
| #endif |
| (*resume) (exc); |
| } |
| #endif |
| |
| _Unwind_Reason_Code |
| __gcc_personality_v0 PERSONALITY_PROTO |
| { |
| if (__glibc_unlikely (libgcc_s_personality == NULL)) |
| __libgcc_s_init (); |
| |
| __typeof (libgcc_s_personality) personality = libgcc_s_personality; |
| #ifdef PTR_DEMANGLE |
| PTR_DEMANGLE (personality); |
| #endif |
| return (*personality) PERSONALITY_ARGS; |
| } |