43 lines · cpp
1//===-- Linux implementation of socket ------------------------------------===//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/sys/socket/socket.h"10 11#include "src/__support/OSUtil/syscall.h" // For internal syscall function.12#include "src/__support/common.h"13 14#include "src/__support/libc_errno.h"15#include "src/__support/macros/config.h"16 17#include <linux/net.h> // For SYS_SOCKET socketcall number.18#include <sys/syscall.h> // For syscall numbers.19 20namespace LIBC_NAMESPACE_DECL {21 22LLVM_LIBC_FUNCTION(int, socket, (int domain, int type, int protocol)) {23#ifdef SYS_socket24 int ret =25 LIBC_NAMESPACE::syscall_impl<int>(SYS_socket, domain, type, protocol);26#elif defined(SYS_socketcall)27 unsigned long sockcall_args[3] = {static_cast<unsigned long>(domain),28 static_cast<unsigned long>(type),29 static_cast<unsigned long>(protocol)};30 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_socketcall, SYS_SOCKET,31 sockcall_args);32#else33#error "socket and socketcall syscalls unavailable for this platform."34#endif35 if (ret < 0) {36 libc_errno = -ret;37 return -1;38 }39 return ret;40}41 42} // namespace LIBC_NAMESPACE_DECL43