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 "src/__support/macros/config.h" 11 #include "syscall.h" // For internal syscall function. 12 #include <sys/syscall.h> // For syscall numbers. 13 14 namespace LIBC_NAMESPACE_DECL { 15 namespace internal { 16 17 // mark as no_stack_protector for x86 since TLS can be torn down before calling 18 // exit so that the stack protector canary cannot be loaded. 19 #ifdef LIBC_TARGET_ARCH_IS_X86 20 __attribute__((no_stack_protector)) 21 #endif 22 __attribute__((noreturn)) void exit(int status)23exit(int status) { 24 for (;;) { 25 LIBC_NAMESPACE::syscall_impl<long>(SYS_exit_group, status); 26 LIBC_NAMESPACE::syscall_impl<long>(SYS_exit, status); 27 } 28 } 29 30 } // namespace internal 31 } // namespace LIBC_NAMESPACE_DECL 32