Linux最简单内核模块编写

hello.h

/*

* head file of hello.ko

* location of following files : /usr/src/$(uname -r)/include/

*/

#include<linux/init.h> //module_init(),module_exit()

#include<linux/module.h> //MODULE_AUTHOR(),MODULE_LICENSE()

#include<linux/kernel.h> //KERN_EMERG



hello.c

/*

* source file of hello.ko

* location: /usr/src/$(uname -r)/driver/net/hello/

*/

#include "hello.h" //find head file in current dir

/*

* hello_init : initial function, called when module is installed

* return 0 if succeeded

*/

static int hello_init(void)

{

printk(KERN_EMERG"hello.ko is installed!\n");

return 0;

}

/*

* hello_exit : called when module is uninstalled

*/

static void hello_exit(void)

{

printk(KERN_EMERG"hello.ko is uninstalled!\n");

}

module_init(hello_init);

module_exit(hello_exit);

MODULE_LICENSE("GPL");

MODULE_AUTHOR("zhangsk");



Makefile

obj-m := hello.o

all:

make -C /lib/modules/$(shell uname -r)/build SUBDIRS=$(PWD) modules

clean:

make -C /lib/modules/$(shell uname -r)/build SUBDIRS=$(PWD) clean



然后在当前文目录中输入： insmod hello.ko

OK, 可以看到屏幕中输出： hello.ko is installed!