pub fn path_readlink<M: Memory>(
    _ctx: &mut WasiCtx,
    _mem: &mut M,
    _dir_fd: __wasi_fd_t,
    _path: WasmPtr<u8>,
    _path_len: __wasi_size_t,
    _buf: WasmPtr<u8>,
    _buf_len: __wasi_size_t,
    _buf_used: WasmPtr<__wasi_size_t>
) -> Result<(), Errno>