uvm_mremap
error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p,
__weak_alias(uvm_mremap,rumplinux__stub);
int uvm_mremap(struct vm_map *, vaddr_t, vsize_t,
error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, flags);