| 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-exception |
| 6 | // |
| 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 | |
| 20 | namespace LIBC_NAMESPACE_DECL { |
| 21 | |
| 22 | LLVM_LIBC_FUNCTION(int, socket, (int domain, int type, int protocol)) { |
| 23 | #ifdef SYS_socket |
| 24 | 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 | #else |
| 33 | #error "socket and socketcall syscalls unavailable for this platform." |
| 34 | #endif |
| 35 | if (ret < 0) { |
| 36 | libc_errno = -ret; |
| 37 | return -1; |
| 38 | } |
| 39 | return ret; |
| 40 | } |
| 41 | |
| 42 | } // namespace LIBC_NAMESPACE_DECL |
| 43 |