1f6b4c34dSMichael Jones //===-- Linux implementation of socketpair --------------------------------===// 2f6b4c34dSMichael Jones // 3f6b4c34dSMichael Jones // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4f6b4c34dSMichael Jones // See https://llvm.org/LICENSE.txt for license information. 5f6b4c34dSMichael Jones // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6f6b4c34dSMichael Jones // 7f6b4c34dSMichael Jones //===----------------------------------------------------------------------===// 8f6b4c34dSMichael Jones 9f6b4c34dSMichael Jones #include "src/sys/socket/socketpair.h" 10f6b4c34dSMichael Jones 11f6b4c34dSMichael Jones #include "src/__support/OSUtil/syscall.h" // For internal syscall function. 12f6b4c34dSMichael Jones #include "src/__support/common.h" 13f6b4c34dSMichael Jones #include "src/__support/macros/config.h" 14*aeb18ebbSMichael Jones #include "src/__support/macros/sanitizer.h" 15f6b4c34dSMichael Jones #include "src/errno/libc_errno.h" 16f6b4c34dSMichael Jones #include <linux/net.h> // For SYS_SOCKET socketcall number. 17f6b4c34dSMichael Jones #include <sys/syscall.h> // For syscall numbers. 18f6b4c34dSMichael Jones 19f6b4c34dSMichael Jones namespace LIBC_NAMESPACE_DECL { 20f6b4c34dSMichael Jones 21f6b4c34dSMichael Jones LLVM_LIBC_FUNCTION(int, socketpair, 22f6b4c34dSMichael Jones (int domain, int type, int protocol, int sv[2])) { 23f6b4c34dSMichael Jones #ifdef SYS_socketpair 24f6b4c34dSMichael Jones int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_socketpair, domain, type, 25f6b4c34dSMichael Jones protocol, sv); 26f6b4c34dSMichael Jones #elif defined(SYS_socketcall) 27f6b4c34dSMichael Jones unsigned long sockcall_args[3] = { 28f6b4c34dSMichael Jones static_cast<unsigned long>(domain), static_cast<unsigned long>(type), 29f6b4c34dSMichael Jones static_cast<unsigned long>(protocol), static_cast<unsigned long>(sv)}; 30f6b4c34dSMichael Jones int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_socketcall, SYS_SOCKETPAIR, 31f6b4c34dSMichael Jones sockcall_args); 32f6b4c34dSMichael Jones #else 33f6b4c34dSMichael Jones #error "socket and socketcall syscalls unavailable for this platform." 34f6b4c34dSMichael Jones #endif 35f6b4c34dSMichael Jones if (ret < 0) { 36f6b4c34dSMichael Jones libc_errno = -ret; 37f6b4c34dSMichael Jones return -1; 38f6b4c34dSMichael Jones } 39*aeb18ebbSMichael Jones 40*aeb18ebbSMichael Jones MSAN_UNPOISON(sv, sizeof(int) * 2); 41*aeb18ebbSMichael Jones 42f6b4c34dSMichael Jones return ret; 43f6b4c34dSMichael Jones } 44f6b4c34dSMichael Jones 45f6b4c34dSMichael Jones } // namespace LIBC_NAMESPACE_DECL 46