linux??????????

?????????
sudo aptitude install linux-source
????????????????????
????????????????
sudo ln -s /usr/src/linux-source-2.6.25/ /lib/modules/`uname -r`/build
?????????????????build??????????????????
????????????????????????????/usr/src????/boot?????????????????????sudo make menuconfig?????load???????????/boot????????????make??
?????????????????
#include
#include
static int hello_init(void)
{
printk("Hello,world!\n");
}
static void hello_exit(void)
{
printk("goodbye\n");
}
module_init(hello_init);
module_exit(hello_exit);
MODULE_LICENSE("GPL");

???Makefile?????

obj-m :=hello.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
??????build????/lib/modules????????build?

???????hello.c?????make????

zhoulv@debian:~/project/module$ ls
hello.c Makefile
zhoulv@debian:~/project/module$ make
make -C /lib/modules/2.6.25-2-686/build M=/home/zhoulv/project/module modules
make[1]: Entering directory `/usr/src/linux-source-2.6.25'

WARNING: Symbol version dump /usr/src/linux-source-2.6.25/Module.symvers
is missing; modules will have no dependencies and modversions.

CC [M] /home/zhoulv/project/module/hello.o
/home/zhoulv/project/module/hello.c: In function ‘hello_init’:
/home/zhoulv/project/module/hello.c:6: warning: no return statement in function returning non-void
Building modules, stage 2.
MODPOST 1 modules
CC /home/zhoulv/project/module/hello.mod.o
LD [M] /home/zhoulv/project/module/hello.ko
make[1]: Leaving directory `/usr/src/linux-source-2.6.25'
zhoulv@debian:~/project/module$ ls
hello.c hello.mod.c hello.o modules.order
hello.ko hello.mod.o Makefile Module.symvers

?????????????
zhoulv@debian:~/project/module$ sudo insmod hello.ko

??????

zhoulv@debian:~/project/module$ sudo lsmod |grep hello
hello 1184 0
zhoulv@debian:~/project/module$ ls
hello.c hello.mod.c hello.o modules.order
hello.ko hello.mod.o Makefile Module.symvers
zhoulv@debian:~/project/module$

?????
zhoulv@debian:~/project/module$ dmesg
...........
[ 7657.010030] Hello,world!
zhoulv@debian:~/project/module$

Hello,world?????!

????
zhoulv@debian:~/project/module$ sudo rmmod hello
zhoulv@debian:~/project/module$ dmesg
........
[ 4700.764823] goodbye
zhoulv@debian:~/project/module$

(NOTE:????????insmod ???.ko,?.ko?????????????????.ko?

?????????????make clean