find_gpa_range
vmr = find_gpa_range(¤t_vm->vm_params, addr, size);
find_gpa_range(struct vmop_create_params *, paddr_t, size_t);
vmr = find_gpa_range(¤t_vm->vm_params, dst, len);
vmr = find_gpa_range(¤t_vm->vm_params, src, len);
vmr = find_gpa_range(¤t_vm->vm_params, gpa, len);