_kvm_kvatop
if (_kvm_kvatop(kd, (u_long)nl[0].n_value, &pa) == 0)
cc = _kvm_kvatop(kd, kva, &pa);
int _kvm_kvatop(kvm_t *, u_long, paddr_t *);
int _kvm_kvatop(kvm_t *, u_long, u_long *);