1 /* Copyright (C) 1991-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <stddef.h>
19 #include <setjmp.h>
20 #include <signal.h>
21 #include <pthreadP.h>
22 #include <jmpbuf-unwind.h>
23
24 extern void __sigstack_longjmp (__jmp_buf, int)
25 __attribute__ ((noreturn));
26
27 /* Like __libc_siglongjmp(), but safe for crossing from alternate
28 signal stack to normal stack. Needed by NPTL. */
29 void
__libc_unwind_longjmp(sigjmp_buf env,int val)30 __libc_unwind_longjmp (sigjmp_buf env, int val)
31 {
32 /* Perform any cleanups needed by the frames being unwound. */
33 __pthread_cleanup_upto (env->__jmpbuf, CURRENT_STACK_FRAME);
34
35 if (env[0].__mask_was_saved)
36 /* Restore the saved signal mask. */
37 __libc_signal_restore_set (&env[0].__saved_mask);
38
39 /* Call the machine-dependent function to restore machine state. */
40 __sigstack_longjmp (env[0].__jmpbuf, val ?: 1);
41 }
42 hidden_def (__libc_unwind_longjmp)
43