mmap_args
{ .sy_narg = AS(mmap_args), .sy_call = (sy_call_t *)sys_mmap, .sy_auevent = AUE_MMAP, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC }, /* 477 = mmap */
struct mmap_args *p = params;
int sys_mmap(struct thread *, struct mmap_args *);
sys_mmap(struct thread *td, struct mmap_args *uap)