rwlock_owner
ultos((uint64_t)rcopy.rwlock_owner, 16,
rwlp->rwlock_owner = (uintptr_t)self;
rwlp->rwlock_owner = 0;
rwlp->rwlock_owner == (uintptr_t)self &&
rwlp->rwlock_owner = (uintptr_t)ulwp;
rwlp->rwlock_owner == (uintptr_t)self) {
rwlp->rwlock_owner = (uintptr_t)self;
generic_so.rwlock.rwlock_owner;