| 1 | //===-- Linux implementation of bind --------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/sys/socket/bind.h" |
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| 10 | |
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| 11 | #include "src/__support/OSUtil/syscall.h" // For internal syscall function. |
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| 12 | #include "src/__support/common.h" |
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| 13 | |
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| 14 | #include "src/__support/libc_errno.h" |
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| 15 | #include "src/__support/macros/config.h" |
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| 16 | |
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| 17 | #include <linux/net.h> // For SYS_SOCKET socketcall number. |
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| 18 | #include <sys/syscall.h> // For syscall numbers. |
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| 19 | |
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| 20 | namespace LIBC_NAMESPACE_DECL { |
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| 21 | |
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| 22 | LLVM_LIBC_FUNCTION(int, bind, |
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| 23 | (int socket, const struct sockaddr *address, |
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| 24 | socklen_t address_len)) { |
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| 25 | #ifdef SYS_bind |
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| 26 | int ret = |
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| 27 | LIBC_NAMESPACE::syscall_impl<int>(SYS_bind, socket, address, address_len); |
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| 28 | #elif defined(SYS_socketcall) |
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| 29 | unsigned long sockcall_args[3] = {static_cast<unsigned long>(socket), |
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| 30 | reinterpret_cast<unsigned long>(address), |
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| 31 | static_cast<unsigned long>(address_len)}; |
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| 32 | int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_socketcall, SYS_BIND, |
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| 33 | sockcall_args); |
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| 34 | #else |
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| 35 | #error "socket and socketcall syscalls unavailable for this platform." |
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| 36 | #endif |
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| 37 | if (ret < 0) { |
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| 38 | libc_errno = -ret; |
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| 39 | return -1; |
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| 40 | } |
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| 41 | return ret; |
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| 42 | } |
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| 43 | |
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| 44 | } // namespace LIBC_NAMESPACE_DECL |
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| 45 | |
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