在ubuntu 11.04下编写驱动程序

在ubuntu11.04下直接就可以编写驱动程序，并进行编译。

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hello.c

#include "linux/init.h"
#include "linux/module.h"

static int hello_init(void)
{
printk(KERN_INFO "Hello World linux_driver_module\n");
return 0;
}

static void hello_exit(void)
{
printk(KERN_INFO "Goodbey linux_driver_module\n");
}

module_init(hello_init);
module_exit(hello_exit);

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Makefile:

#Makefile 2.6
ifneq ($(KERNELRELEASE),)
#kbuild syntax dependency relationship of files and target modules are listed here.
mymodule-objs:=hello.o
obj-m:=hello.o
else
PWD:=$(shell pwd)
KVER?=$(shell uname -r)
KDIR:=/lib/modules/$(KVER)/build
all:

$(MAKE) -C $(KDIR) M=$(PWD)

clean:

rm -rf .*.com *.o *.mod.c *.ko .tmp_versions

endif

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步骤:

1.sudo make all;

2.生成hello.ko文件

3.insmod hello.ko

4.lsmod,可以看到hello模块

5.rmmod hello.ko