| //===---------- Linux implementation of the POSIX munmap function ---------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/sys/mman/munmap.h" |
| |
| #include "config/linux/syscall.h" // For internal syscall function. |
| #include "include/sys/syscall.h" // For syscall numbers. |
| #include "src/__support/common.h" |
| #include "src/errno/llvmlibc_errno.h" |
| |
| namespace __llvm_libc { |
| |
| // This function is currently linux only. It has to be refactored suitably if |
| // mmap is to be supported on non-linux operating systems also. |
| LLVM_LIBC_FUNCTION(int, munmap, (void *addr, size_t size)) { |
| long ret_val = |
| __llvm_libc::syscall(SYS_munmap, reinterpret_cast<long>(addr), size); |
| |
| // A negative return value indicates an error with the magnitude of the |
| // value being the error code. |
| if (ret_val < 0) { |
| llvmlibc_errno = -ret_val; |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| } // namespace __llvm_libc |