A Simple 32-bit OS lab tutorial.

Yat-Sen OS

Last update: Dec 12, 2022

Overview

一个支点撬动操作系统大山

项目名称：逸仙OS简明教程 ( YatSenOS Volume First )
所属机构：中山大学操作系统实验课程组

写在前面

本项目已经成功用于2021年中山大学春季操作系统实验课程，课程的地址是https://gitee.com/nelsoncheung/sysu-2021-spring-operating-system/tree/main/
项目的论文是"一个支点撬动操作系统大山.pdf"，务必首先阅读论文来了解我们的项目设计。
从lab1到lab9构成了我们自主设计的实验教材，分为第零章到第八章，共九章。可以通过阅读lab1到lab9的README.md来进一步了解我们的实验设计。
本项目使用MulanPSL-2.0开源许可协议。

项目结构

appendix用于存放一些先修知识的介绍。
labX用于存放第X次实验，在labX文件夹下
- gallery用于存放指导材料中的图片资源。
- src用于存放示例代码。
- README.md是指导材料。
env用于存放特定版本的软件。
references用于存放参考资料。

This repository contains notes and starter code for Bit manipulation and mathematics session for DSA bootcamp organized by Codeflows.

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Comments

记录一下 lab2 实操过程出现的问题及其解决办法

环境：ubuntu 16.04

编写 MBR

现象：输入

qemu-system-i386 -hda hd.img -serial null -parallel stdio

无法启动 qemu，提示

WARNING: Image format was not specified for 'hd.img' and probing guessed raw.
         Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
         Specify the 'raw' format explicitly to remove the restrictions.
Could not initialize SDL(No available video device) - exiting

原因：提示已经很清楚了，需要换一种指明格式的写法输入命令：

qemu-system-i386 -drive file=hd.img,format=raw,index=0,media=disk -serial null -parallel stdio -curses

-drive 那一串跟 -hda 是一个意思，只是写法形式不一样，后面加的 -curses 是为了解决 Could not initialize SDL(No available video device) - exiting，但是不知道如何在 mac 下退出 -curses 模式，只能 kill 掉 qemu 进程

opened by rust17 0

记录一下 lab1 实操过程出现的问题及其解决办法

编译内核

现象：在执行完 make menuconfig 后无法找到 bzImage 和 vmlinux
原因：一开始 lab1 使用了非用户根目录，而是在其他的目录里面，后来把 lab1 放在 ~/ 下再重新操作一遍就好了

加载 Busybox

现象：在执行

qemu-system-i386 -kernel linux-5.10.19/arch/x86/boot/bzImage -initrd initramfs-busybox-x86.cpio.gz -nographic -append "console=ttyS0"

时，控制台提示：

[    2.095489] Run /init as init process
[    2.096723] Failed to execute /init (error -8)
[    2.099737] Run /sbin/init as init process
can't run '/etc/init.d/rcS': No such file or directory
can't open /dev/tty2: No such file or directory
can't open /dev/tty3: No such file or directory
can't open /dev/tty4: No such file or directory

原因：自定义的 init 程序执行失败，执行了 BusyBox 自己的 init 程序，导致了一些连带问题。后来修改 init 文件如下就可以了：

#!/bin/sh
mount -t proc none /proc
mount -t sysfs none /sys
echo -e "\nBoot took $(cut -d' ' -f1 /proc/uptime) seconds\n"
exec /bin/sh

opened by rust17 0

Owner

Yat-Sen OS

Operating System Projects of Sun Yat-Sen University.

GitHub

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