Compile and install Linux kernel 2.6.x, a simple kernel driver test

One of the new installation items is: Download now:
Download www.kernel.org,

Decompress the package to/usr/src:
Bzip2-DC linux-2.6.24.4.tar.bz2 | tar xvf-
Rename the folder linux-2.6.24.4 as: Linux-Kernel

Under any folder, write a shell file named A. Sh with the following content:

1. #! /Bin/bash
2. Mkdir-P/home/name/build/kernel
3. CD/usr/src/Linux-Kernel
4. Make mrproper
5. Make o =/home/name/build/kernel menuconfig
6. Make o =/home/name/build/kernel
7. Sudo make o =/home/name/build/kernel modules_install install

Then open a terminal and execute
Bash A. Sh
In the shell file, "O =/home/name/build/kernel" indicates that the compilation configuration is carried out in the folder after "=". You can check it yourself.
In addition to Kernel configuration, you can skip the subsequent process.
In this process, a new kernel startup image is automatically generated and copied to the/boot directory without manual copying.

Then modify the menu. LST file to enable the system to start with the new kernel:
Vim/etc/GRUB/menu. lst
The content is as follows:

2. Default = 2
3. Timeout = 5
4. Splashimage = (hd0, 6)/boot/GRUB/splash.xpm.gz
5. Hiddenmenu
6. Title centos (2.6.24.4)
7. Root (hd0, 6)
8. Kernel/boot/vmlinuz-2.6.24.4 Ro root = label =/rhgb quiet
9. Initrd/boot/initrd-2.6.24.4.img
10. Title centos (2.6.18-53. EL5)
11. Root (hd0, 6)
12. Kernel/boot/vmlinuz-2.6.18-53.el5 Ro root = label =/rhgb quiet
13. Initrd/boot/initrd-2.6.18-53.el5.img
14. Title Windows XP
15. Rootnoverify (hd0, 0)
16. Chainloader + 1
18. Comment out this part:
19. Title centos (2.6.18-53. EL5)
20. Root (hd0, 6)
21. Kernel/boot/vmlinuz-2.6.18-53.el5 Ro root = label =/rhgb quiet
22. Initrd/boot/initrd-2.6.18-53.el5.img
23. Change
24. # Title centos (2.6.18-53. EL5)
25. # Root (hd0, 6)
26. # Kernel/boot/vmlinuz-2.6.18-53.el5 Ro root = label =/rhgb quiet
27. # Initrd/boot/initrd-2.6.18-53.el5.img
29. Modify default = 0 again. Here 0 corresponds to the first title, and so on.
30. Restart.

The output file for compiling the kernel is too large, that is,/home/name/build/kernel, which can be deleted at the end. Do not delete the driver.

Write the simplest DRIVER: Hello. c

 

/* ===================================================== ======================================
A simple kernel module: "Hello World"
========================================================== ===================================== */
# Include <Linux/init. h>
# Include <Linux/module. h>
Module_license ("dual BSD/GPL ");

Static int hello_init (void)
{
Printk (kern_alert "Hello world enter ");
Return 0;
}

Static void hello_exit (void)
{
Printk (kern_alert "Hello World exit ");
}

Module_init (hello_init );
Module_exit (hello_exit );
Module_author ("ztz0223 ");
Module_description ("a simple hello World module ");
Module_alias ("a simplest module ");

 

Then write a makefile

As follows:

 

Pwd = $ (shell PWD)
Kernel_src =/usr/src/linux-2.6.24.4/

OBJ-M: = Hello. o
Module-objs: = Hello. o

ALL:
$ (Make)-C $ (kernel_src) M = $ (PWD) Modules

Clean:
RM *. Ko
RM *. o

 

Open the terminal and go to make in the hello. c path. The 2.6 kernel does not seem to support GCC compilation. Use make as follows:

[Root @ btazuo azuo] # cd Hello // enter the driver path. This part is a comment
[Root @ btazuo Hello] # dir
Hello. c makefile
[Root @ btazuo Hello] # Make // compile
Make-C/lib/modules/2.6.24.4/build M =/azuo/Hello modules
Make [1]: Entering directory '/usr/src/linux-2.6.24.4'
CC [m]/azuo/Hello. o
Building modules, stage 2.
Modpost 1 modules
CC/azuo/Hello. Mod. o
LD [m]/azuo/Hello. Ko
Make [1]: Leaving directory '/usr/src/linux-2.6.24.4'
[Root @ btazuo Hello] # dir // compiled successfully
Hello. c hello. Ko hello. Mod. c hello. Mod. O hello. O makefile module. symvers
[Root @ btazuo Hello] #

 

Load and uninstall drivers:

 

Open the/var/log/messages file and you can see the kernel loading and uninstalling information:

Hello world enter
Hello World exit
Indicates that the kernel is loaded and uninstalled successfully!

 

This is taken from other places. I have read some help for learning and installing the Linux kernel! Learn more.

1. [Root @ btazuo Hello] # insmod./Hello. Ko
2. [Root @ btazuo Hello] # rmmod./Hello. Ko