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/errno/libc_errno.h" 15 16 #include <linux/net.h> // For SYS_SOCKET socketcall number. 17 #include <sys/syscall.h> // For syscall numbers. 18 19 namespace LIBC_NAMESPACE { 20 21 LLVM_LIBC_FUNCTION(int, bind, 22 (int domain, const struct sockaddr *address, 23 socklen_t address_len)) { 24 #ifdef SYS_socket 25 int ret = 26 LIBC_NAMESPACE::syscall_impl<int>(SYS_bind, domain, address, address_len); 27 #elif defined(SYS_socketcall) 28 unsigned long sockcall_args[3] = {static_cast<unsigned long>(domain), 29 reinterpret_cast<unsigned long>(address), 30 static_cast<unsigned long>(address_len)}; 31 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_socketcall, SYS_BIND, 32 sockcall_args); 33 #else 34 #error "socket and socketcall syscalls unavailable for this platform." 35 #endif 36 if (ret < 0) { 37 libc_errno = -ret; 38 return -1; 39 } 40 return ret; 41 } 42 43 } // namespace LIBC_NAMESPACE 44