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

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

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

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