107bd4394SRoseZhang03 //===------------ Linux implementation of an exit function ------*- C++ -*-===// 207bd4394SRoseZhang03 // 307bd4394SRoseZhang03 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 407bd4394SRoseZhang03 // See https://llvm.org/LICENSE.txt for license information. 507bd4394SRoseZhang03 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 607bd4394SRoseZhang03 // 707bd4394SRoseZhang03 //===----------------------------------------------------------------------===// 807bd4394SRoseZhang03 9*68112f0fSNick Desaulniers #include "src/__support/OSUtil/linux/syscall.h" // syscall_impl 1007bd4394SRoseZhang03 #include "src/__support/common.h" 115ff3ff33SPetr Hosek #include "src/__support/macros/config.h" 1207bd4394SRoseZhang03 #include <sys/syscall.h> // For syscall numbers. 1307bd4394SRoseZhang03 145ff3ff33SPetr Hosek namespace LIBC_NAMESPACE_DECL { 155ff3ff33SPetr Hosek namespace internal { 1607bd4394SRoseZhang03 1707bd4394SRoseZhang03 // mark as no_stack_protector for x86 since TLS can be torn down before calling 1807bd4394SRoseZhang03 // exit so that the stack protector canary cannot be loaded. 1907bd4394SRoseZhang03 #ifdef LIBC_TARGET_ARCH_IS_X86 20435e5c10SRoseZhang03 __attribute__((no_stack_protector)) 2107bd4394SRoseZhang03 #endif 22435e5c10SRoseZhang03 __attribute__((noreturn)) void 2307bd4394SRoseZhang03 exit(int status) { 2407bd4394SRoseZhang03 for (;;) { 2507bd4394SRoseZhang03 LIBC_NAMESPACE::syscall_impl<long>(SYS_exit_group, status); 2607bd4394SRoseZhang03 LIBC_NAMESPACE::syscall_impl<long>(SYS_exit, status); 2707bd4394SRoseZhang03 } 2807bd4394SRoseZhang03 } 2907bd4394SRoseZhang03 305ff3ff33SPetr Hosek } // namespace internal 315ff3ff33SPetr Hosek } // namespace LIBC_NAMESPACE_DECL 32