msgsnd_args
{ .sy_narg = AS(msgsnd_args), .sy_call = (sy_call_t *)lkmressys, .sy_auevent = AUE_NULL, .sy_flags = 0, .sy_thrcnt = SY_THR_ABSENT }, /* 226 = msgsnd */
struct msgsnd_args *p = params;
sys_msgsnd(struct thread *td, struct msgsnd_args *uap)
int sys_msgsnd(struct thread *, struct msgsnd_args *);