probe process.function("foo").return {
    printf("ecx = %#x\n", register("ecx"));
    printf("u ecx = %#x\n\n", u_register("ecx"));

    printf("cx = %#x\n", register("cx"));
    printf("u cx = %#x\n\n", u_register("cx"));

    printf("cl = %#x\n", register("cl"));
    printf("u cl = %#x\n\n", u_register("cl"));

    printf("ch = %#x\n", register("ch"));
    printf("u ch = %#x\n", u_register("ch"));
    exit()
}
