| //===-- Implementation of sigsetjmp_epilogue ------------------------------===// | |
| // | |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |
| // See https://llvm.org/LICENSE.txt for license information. | |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |
| // | |
| //===----------------------------------------------------------------------===// | |
| #include "src/setjmp/sigsetjmp_epilogue.h" | |
| #include "src/__support/OSUtil/syscall.h" | |
| #include "src/__support/common.h" | |
| #include <sys/syscall.h> // For syscall numbers. | |
| namespace LIBC_NAMESPACE_DECL { | |
| [[gnu::returns_twice]] int sigsetjmp_epilogue(sigjmp_buf buffer, int retval) { | |
| // If set is NULL, then the signal mask is unchanged (i.e., how is | |
| // ignored), but the current value of the signal mask is nevertheless | |
| // returned in oldset (if it is not NULL). | |
| syscall_impl<long>(SYS_rt_sigprocmask, SIG_SETMASK, | |
| /* set= */ retval ? &buffer->sigmask : nullptr, | |
| /* old_set= */ retval ? nullptr : &buffer->sigmask, | |
| sizeof(sigset_t)); | |
| return retval; | |
| } | |
| } // namespace LIBC_NAMESPACE_DECL |