1 //===------------ Linux implementation of an exit function ------*- C++ -*-===// 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/__support/common.h" 10 #include "syscall.h" // For internal syscall function. 11 #include <sys/syscall.h> // For syscall numbers. 12 13 namespace LIBC_NAMESPACE::internal { 14 15 // mark as no_stack_protector for x86 since TLS can be torn down before calling 16 // exit so that the stack protector canary cannot be loaded. 17 #ifdef LIBC_TARGET_ARCH_IS_X86 18 __attribute__((no_stack_protector)) 19 #endif 20 __attribute__((noreturn)) void exit(int status)21exit(int status) { 22 for (;;) { 23 LIBC_NAMESPACE::syscall_impl<long>(SYS_exit_group, status); 24 LIBC_NAMESPACE::syscall_impl<long>(SYS_exit, status); 25 } 26 } 27 28 } // namespace LIBC_NAMESPACE::internal 29