| 1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <stddef.h> |
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| 19 | #include <setjmp.h> |
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| 20 | #include <signal.h> |
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| 21 | #include <pthreadP.h> |
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| 22 | #include <jmpbuf-unwind.h> |
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| 23 | |
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| 24 | extern void __sigstack_longjmp (__jmp_buf, int) |
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| 25 | __attribute__ ((noreturn)); |
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| 26 | |
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| 27 | /* Like __libc_siglongjmp(), but safe for crossing from alternate |
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| 28 | signal stack to normal stack. Needed by NPTL. */ |
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| 29 | void |
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| 30 | __libc_unwind_longjmp (sigjmp_buf env, int val) |
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| 31 | { |
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| 32 | /* Perform any cleanups needed by the frames being unwound. */ |
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| 33 | __pthread_cleanup_upto (env->__jmpbuf, CURRENT_STACK_FRAME); |
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| 34 | |
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| 35 | if (env[0].__mask_was_saved) |
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| 36 | /* Restore the saved signal mask. */ |
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| 37 | __libc_signal_restore_set (set: &env[0].__saved_mask); |
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| 38 | |
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| 39 | /* Call the machine-dependent function to restore machine state. */ |
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| 40 | __sigstack_longjmp (env[0].__jmpbuf, val ?: 1); |
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| 41 | } |
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| 42 | hidden_def (__libc_unwind_longjmp) |
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| 43 | |
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