A no_std bare-metal hardware abstraction layer — all port I/O, memory and swap allocations are guarded at runtime. Do not consider this dependency stable before x.1.x
/// # Safety
/// Caller must ensure `nr` is a valid syscall number and arguments are correct.
pubunsafefnraw_syscall(_nr:i64,
_a0:u64,
_a1:u64,
_a2:u64,
_a3:u64,
_a4:u64,
_a5:u64,
)->i64{crate::common::error::ERR_NOT_IMPLEMENTED}