| 1 | //===-- Implementation of sigsetjmp_epilogue ------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/setjmp/sigsetjmp_epilogue.h" |
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| 10 | #include "src/__support/OSUtil/syscall.h" |
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| 11 | #include "src/__support/common.h" |
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| 12 | #include <sys/syscall.h> // For syscall numbers. |
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| 13 | |
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| 14 | namespace LIBC_NAMESPACE_DECL { |
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| 15 | [[gnu::returns_twice]] int sigsetjmp_epilogue(jmp_buf buffer, int retval) { |
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| 16 | // If set is NULL, then the signal mask is unchanged (i.e., how is |
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| 17 | // ignored), but the current value of the signal mask is nevertheless |
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| 18 | // returned in oldset (if it is not NULL). |
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| 19 | syscall_impl<long>(SYS_rt_sigprocmask, SIG_SETMASK, |
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| 20 | /* set= */ retval ? &buffer->sigmask : nullptr, |
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| 21 | /* old_set= */ retval ? nullptr : &buffer->sigmask, |
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| 22 | sizeof(sigset_t)); |
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| 23 | return retval; |
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| 24 | } |
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| 25 | } // namespace LIBC_NAMESPACE_DECL |
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| 26 | |
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