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/macros/config.h" 15 #include "src/errno/libc_errno.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, 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