【Linux裝置驅動程式（第三版）】—-HelloWorld

【Linux裝置驅動程式（第三版）】----HelloWorld

HelloWorld.c

#include <linux/init.h>#include <linux/module.h>MODULE_LICENSE("Dual BSD/GPL");static int hello_init(void){printk(KERN_ALERT "Hello, World!\n");return 0;}static void hello_exit(void){printk(KERN_ALERT "Goodbye,world!\n");}module_init(hello_init);module_exit(hello_exit);

Makefile

obj-m:= HelloWorld.omodules-objs:= HelloWorld.oKDIR:= /usr/src/linux-headers-2.6.31-14-generic/PWD:= $(shell pwd)default:make -C $(KDIR) M=$(PWD) modulesclean:rm -rf *.ko *.mod.c *.mod.o *.o *.markers *.symvers *.order

 make

make -C /usr/src/linux-headers-2.6.31-14-generic/ M=/home/wangzhzh/Module/HelloWorld modulesmake[1]: Entering directory `/usr/src/linux-headers-2.6.31-14-generic'  CC [M]  /home/wangzhzh/Module/HelloWorld/HelloWorld.o  Building modules, stage 2.  MODPOST 1 modules  CC      /home/wangzhzh/Module/HelloWorld/HelloWorld.mod.o  LD [M]  /home/wangzhzh/Module/HelloWorld/HelloWorld.komake[1]: Leaving directory `/usr/src/linux-headers-2.6.31-14-generic'

裝載模組

insmod HelloWorld.ko

卸載模組

rmmod HelloWorld

 

查看Log

dmesg[84263.420542] Hello, World![84272.598899] Goodbye,world!