message: only support clock id 0
diff: @@ -40,7 +40,11 @@ pub extern "C" fn _clock_gettime(clk_id: c_int, tp: c_int, instance: &mut Instan
  tv_nsec: i32,
  }
  - let timespec = time::get_time();
  + let timespec = match clk_id {
  + 0 => time::get_time(),
  + 1 => panic!("Monotonic clock is not supported."),
  + _ => panic!("Clock is not supported."),
  + };
  unsafe {
  let timespec_struct_ptr = instance.memory_offset_addr(0, tp as _) as *mut GuestTimeSpec;
  