Make a new root file system ---busybox-1.20.0--- (JZ2440-S3C2440)

1. Unzip, compile and install busybox-1.20.0.tar.bz2

(1) Unzip: tar xjf busybox-1.20.0.tar.bz2

Enter the directory: cd busybox-1.20.0

cd busybox-1.20.0

Configuration: make menuconfig

(2) Then specify the cross-compiler.

The process of specifying a cross compiler is as follows:

Configure the cross-compiler, save and exit after completion.

(3) Compilation and installation

Compile command: make

After compiling, install:

Create a fs_mini_mdev_new in the /work/nfs_root/ directory.

Command: cd /work/nfs_root/

mkdir fs_mini_mdev_new

Installation: make install CONFIG_PREFIX=/work/nfs-root/fs_mini_mdev_new

The result after installation is as follows:

2. Install the library

(1) Check the directory where the cross-compilation tool is located: echo $PATH

The location is: /usr/local/arm/4.3.2/bin/

(2) Enter the directory where the cross-tool is located, /usr/local/arm/4.3.2/, and view the library.

Among them, only two armv4t related libraries will be used

(3) Create a lib directory in /work/nfs-root/fs_mini_mdev_new

Command: mkdir /work/nfs-root/fs_mini_mdev_new/lib

File copy:

Command: cp /usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/armv4t/lib/*.so* /work/nfs-root/fs_mini_mdev_new/lib -d

Create a directory: mkdir /work/nfs-root/fs_mini_mdev_new/usr/lib -p

cp /usr/local/arm/4.3.2/arm-none-linux-gnueabi/libc/armv4t/usr/lib/*.so* /work/nfs-root/fs_mini_mdev_new/usr/lib -d

(4) Construct etc directory

Here we copy the etc directory in the /work/nfs_root/second_fs/ directory to /work/nfs-root/fs_mini_mdev_new/.

Copy command: cp /work/nfs_root/second_fs/etc /work/nfs-root/fs_mini_mdev_new/ -rf

The /etc/inittab file and /etc/init.d/rcS file are no longer modified here.

(5) Create dev and create file nodes

Command: mkdir /work/nfs_root/second_fs/dev

sudo mknod dev/console c 5 1

sudo mknod dev/null c 1 3 

(6) Create other proc, tmp, mnt, sys, and root directories

Command: mkdir proc tmp mnt sys root

3. Make jffs2 image file

Command: mkfs.jffs2 -n -s 2048 -e 128KiB -d fs_mini_mdev_new/ -o fs_mini_mdev_new.jffs2

The results are as follows:

Then you can perform the file system burning experiment using fs_mini_mdev_new.jffs2.

Secondly, you need to configure the kernel to support EABI.