jiangtiandao / mykernel

It is a platform to write your own OS kernel,its based on Linux Kernel 3.9.4 source code.

Welcome to the mykernel!

It is a platform to write your own OS kernel,its based on Linux Kernel 3.9.4 source code.

• Set up this platform

  • sudo apt-get install qemu # install QEMU
  • sudo ln -s /usr/bin/qemu-system-i386 /usr/bin/qemu
  • wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.9.4.tar.xz # download Linux Kernel 3.9.4 source code
  • wget https://raw.github.com/mengning/mykernel/master/mykernel_for_linux3.9.4sc.patch # download mykernel_for_linux3.9.4sc.patch
  • xz -d linux-3.9.4.tar.xz
  • tar -xvf linux-3.9.4.tar
  • cd linux-3.9.4
  • patch -p1 < ../mykernel_for_linux3.9.4sc.patch
  • make allnoconfig
  • make
  • qemu -kernel arch/x86/boot/bzImage 从qemu窗口中您可以看到my_start_kernel在执行，同时my_timer_handler时钟中断处理程序周期性执行。
  • cd mykernel 您可以看到qemu窗口输出的内容的代码mymain.c和myinterrupt.c
  • 当前有一个CPU执行C代码的上下文环境，同时具有中断处理程序的上下文环境，我们初始化好了系统环境。
  • 您只要在mymain.c基础上继续写进程描述PCB和进程链表管理等代码，在myinterrupt.c的基础上完成进程切换代码，一个可运行的小OS kernel就完成了。
  • start to write your own OS kernel,enjoy it!

• mykernel patch generated by this command:

  • diff -Naur linux-3.9.4 linux-3.9.4.new/ > mykernel_for_linux3.9.4sc.patch

Links

• 2013年暑期补课计算机操作系统原理