26 lines · cpp
1//===-- Implementation of sigsetjmp_epilogue ------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/setjmp/sigsetjmp_epilogue.h"10#include "src/__support/OSUtil/syscall.h"11#include "src/__support/common.h"12#include <sys/syscall.h> // For syscall numbers.13 14namespace LIBC_NAMESPACE_DECL {15[[gnu::returns_twice]] int sigsetjmp_epilogue(sigjmp_buf buffer, int retval) {16 // If set is NULL, then the signal mask is unchanged (i.e., how is17 // ignored), but the current value of the signal mask is nevertheless18 // returned in oldset (if it is not NULL).19 syscall_impl<long>(SYS_rt_sigprocmask, SIG_SETMASK,20 /* set= */ retval ? &buffer->sigmask : nullptr,21 /* old_set= */ retval ? nullptr : &buffer->sigmask,22 sizeof(sigset_t));23 return retval;24}25} // namespace LIBC_NAMESPACE_DECL26