1//===-- Linux implementation of bind --------------------------------------===//
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/bind.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, bind,
23 (int socket, const struct sockaddr *address,
24 socklen_t address_len)) {
25#ifdef SYS_bind
26 int ret =
27 LIBC_NAMESPACE::syscall_impl<int>(SYS_bind, socket, address, address_len);
28#elif defined(SYS_socketcall)
29 unsigned long sockcall_args[3] = {static_cast<unsigned long>(socket),
30 reinterpret_cast<unsigned long>(address),
31 static_cast<unsigned long>(address_len)};
32 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_socketcall, SYS_BIND,
33 sockcall_args);
34#else
35#error "socket and socketcall syscalls unavailable for this platform."
36#endif
37 if (ret < 0) {
38 libc_errno = -ret;
39 return -1;
40 }
41 return ret;
42}
43
44} // namespace LIBC_NAMESPACE_DECL
45

source code of libc/src/sys/socket/linux/bind.cpp