mprotect_args
{ .sy_narg = AS(mprotect_args), .sy_call = (sy_call_t *)sys_mprotect, .sy_auevent = AUE_MPROTECT, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC }, /* 74 = mprotect */
struct mprotect_args *p = params;
int sys_mprotect(struct thread *, struct mprotect_args *);
sys_mprotect(struct thread *td, struct mprotect_args *uap)