hello.c:
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("xudonglee");static int hello_init(void)
{
printk(KERN_ALERT "Hello, world!\n");
return ;
}static void hello_exit(void)
{
printk(KERN_ALERT "Goodbye, My Dear World!\n");
}module_init(hello_init);
module_exit(hello_exit);
Makefile:
obj-m = hello.o
KVERSION = $(shell uname -r)
all:
make -C /lib/modules/$(KVERSION)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(KVERSION)/build M=$(PWD) clean
The files:
order in terminal:
make
insmod hello.ko
tail /var/log/messages(read the log of output)
rmmod hello.ko
tail /var/log/messages(read the log of output)
