msgctl_args
{ .sy_narg = AS(msgctl_args), .sy_call = (sy_call_t *)lkmressys, .sy_auevent = AUE_NULL, .sy_flags = 0, .sy_thrcnt = SY_THR_ABSENT }, /* 511 = msgctl */
struct msgctl_args *p = params;
sys_msgctl(struct thread *td, struct msgctl_args *uap)
int sys_msgctl(struct thread *, struct msgctl_args *);