You define your own macro for that , or setup your own function for that. That function will contain syscall(call_number). Simply stated, that macro refuses to compile on many a systems. (including mine, GCC 4.2) duryodhan -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ