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liva/minimal-linux

原作者: [db:作者] 来自: 网络 收藏 邀请

开源软件名称(OpenSource Name):

liva/minimal-linux

开源软件地址(OpenSource Url):

https://github.com/liva/minimal-linux

开源编程语言(OpenSource Language):

C 93.8%

开源软件介绍(OpenSource Introduction):

minimal linux

What's this?

This is the stripped version of linux kernel for learning.

Features are

  • fast compilation (only takes 20 seconds on Xeon E3-1275 v5 @ 3.60GHz)
  • less source files (almost 900 .c files)

Limitations are

  • only works on x86_64 QEMU
  • only supports 8250 serial driver

compilation

Use 'minimalconfig' for configuration. DO NOT GENERATE '.config' FROM 'make' COMMANDS!

$ cp minimalconfig .config
$ make -j8 bzImage

make rootfs

$ cd (project_root)
$ wget http://busybox.net/downloads/busybox-1.27.2.tar.bz2
$ tar xf busybox-1.27.2.tar.bz2
$ cd busybox
$ make menuconfig
Busybox Settings ---> Build Options --->Build BusyBox as a static binary (no shared libs)
$ make -j8
$ make install
$ mv _install ../rootfs
$ cd ../rootfs
$ find . | cpio -o --format=newc > ../rootfs.img
$ cd ..

run

qemu-system-x86_64 -kernel arch/x86/boot/bzImage -initrd (project_root)/rootfs.img -append "console=tty0 console=ttyS0,115200 root=/dev/ram rdinit=/bin/sh" -curses

You must switch to the serial console monitor with Ctrl+Alt+3.

to use procfs and sysfs

Run these commands in the busybox shell.

# mkdir /proc /sys
# mount -t proc none /proc
# mount -t sysfs none /sys
# mdev -s



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