在centos 6上的helloworld模块测试

[root@localhost test]# ls 
helloworld.c  Makefile 
[root@localhost test]# make 
make -C /lib/modules/2.6.32-71.29.1.el6.i686/build M=/home/android/test modules 
make[1]: Entering directory `/usr/src/kernels/2.6.32-71.29.1.el6.i686' 
CC [M]  /home/android/test/helloworld.o 
Building modules, stage 2. 
MODPOST 1 modules 
CC  /home/android/test/helloworld.mod.o 
LD [M]  /home/android/test/helloworld.ko.unsigned 
NO SIGN [M] /home/android/test/helloworld.ko 
make[1]: Leaving directory `/usr/src/kernels/2.6.32-71.29.1.el6.i686' 
[root@localhost test]# ls 
helloworld.chelloworld.mod.c  Makefile 
helloworld.ko   helloworld.mod.o  modules.order 
helloworld.ko.unsigned  helloworld.o  Module.symvers 
[root@localhost test]# insmod helloworld.ko 
insmod: error inserting 'helloworld.ko': -1 File exists 
[root@localhost test]# rmmod helloworld.ko 
[root@localhost test]# ls 
helloworld.chelloworld.mod.c  Makefile 
helloworld.ko   helloworld.mod.o  modules.order 
helloworld.ko.unsigned  helloworld.o  Module.symvers 
[root@localhost test]# insmod helloworld.ko 
[root@localhost test]# modinfo helloworld.ko 
filename:   helloworld.ko 
author: yuanwei 
license:GPL 
srcversion: E074EFF1EF4BF929639B50D 
depends: 
vermagic:   2.6.32-71.29.1.el6.i686 SMP mod_unload modversions 686 
[root@localhost test]# 

附上 helloworld 源码和Makefile

#include <linux/module.h> 
#include <linux/kernel.h> 
#include <linux/init.h> 

static int __init hellokernel_init(void) 
{ 
printk(KERN_INFO "Hello kernel!\n"); 
return 0; 
} 
 
static void __exit hellokernel_exit(void) 
{ 
printk(KERN_INFO "Exit kernel!\n"); 
} 
 
module_init(hellokernel_init); 
module_exit(hellokernel_exit); 

MODULE_LICENSE("GPL"); 
MODULE_AUTHOR("yuanwei"); 
~ 
~ 
~ 
~ 

obj-m := helloworld.o 
 
PWD   := $(shell pwd) 
 
all: 
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules 
 
clean: 
rm -rf *.o *~ core .*.cmd *.mod.c ./tmp_version *.ko.* modules.* Module.* 

如果是CentOS 平台。需要安装kernel头文件

需要用YUM安装

[root@localhost test]# yum install kernel-devel
Loaded plugins: fastestmirror, refresh-packagekit
Loading mirror speeds from cached hostfile
* base: data.nicehosting.co.kr
* extras: data.nicehosting.co.kr
* updates: data.nicehosting.co.kr
Setting up Install Process
Package kernel-devel-2.6.32-71.29.1.el6.i686 already installed and latest version
Nothing to do