rust-based-os-comp2022/user/src/bin/ch4_mmap3.rs

#![no_std]
#![no_main]

#[macro_use]
extern crate user_lib;

use user_lib::mmap;

/*
理想结果：对于错误的 mmap 返回 -1，最终输出 Test 04_4 test OK!
*/

#[no_mangle]
fn main() -> i32 {
    let start: usize = 0x10000000;
    let len: usize = 4096;
    let prot: usize = 3;
    assert_eq!(0, mmap(start, len, prot));
    assert_eq!(mmap(start - len, len + 1, prot), -1);
    assert_eq!(mmap(start + len + 1, len, prot), -1);
    assert_eq!(mmap(start + len, len, 0), -1);
    assert_eq!(mmap(start + len, len, prot | 8), -1);
    println!("Test 04_4 test OK!");
    0
}