Linux设备驱动程序学习（0）－Hello, world！模块

#
include
 <
linux/
init.
h>

#
include
 <
linux/
module.
h> 

MODULE_LICENSE(
"Dual BSD/GPL"
)
;

static
 int
 hello_init(
void
)

{

    printk(
KERN_ALERT "Hello, Tekkaman Ninja ！/n"
)
;

    return
 0;

}

static
 void
 hello_exit(
void
)

{

    printk(
KERN_ALERT "Goodbye, Tekkaman Ninja ！/n Love Linux !Love ARM ! Love KeKe !

/n

"

);}module_init(hello_init);module_exit(hello_exit);

KERNELDIR = /home/tekkaman/working/SBC2440/linux-2.6.22.2    # The current directory is passed to sub-makes as argumentPWD := $(shell pwd)INSTALLDIR = /home/tekkaman/working/rootfs/lib/modulesCROSS_COMPILE    =/home/tekkaman/working/crosstool-gcc410-k26222/gcc-4.1.0-glibc-2.3.2/arm-9tdmi-linux-gnu/bin/arm-9tdmi-linux-gnu-CC    = $(CROSS_COMPILE)gccobj-m := hello.o modules:    $(MAKE) -C $(KERNELDIR) M=$(PWD) modulesmodules_install:    cp hello.ko $(INSTALLDIR)clean:    rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions.PHONY: modules modules_install clean

EXPORT_SYMBOL(name);EXPORT_SYMBOL_GPL(name);

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

MODULE_LICENSE("Dual BSD/GPL");

MODULE_AUTHOR("");MODULE_DESCRIPTION("");MODULE_VERSION("");MODULE_ALIAS("");MODULE_DEVICE_TABLE("");

static int _ _

init

 initialization_function(void){/*初始化代码*/}module_init(initialization_function)

static int _ _exit cleanup_function(void){/*清除代码*/}module_exit(cleanup_function)

struct something *item1;struct somethingelse *item2;int stuff_ok;

void my_cleanup(void){    if (item1)

        release_thing(item1);    if (item2)        release_thing2(item2);    if (stuff_ok)        unregister_stuff();    return;}int __init my_init(void){    int err = -ENOMEM;    item1 = allocate_thing(arguments);    item2 = allocate_thing2(arguments2);    if (!item2 || !item2)        goto fail;    err = register_stuff(item1, item2);    if (!err)        stuff_ok = 1;    else        goto fail;    return 0; /* success */

 fail:        my_cleanup( );        return err;}

#include <linux/init.h>#include <linux/module.h>#include <linux/moduleparam.h>MODULE_LICENSE("Dual BSD/GPL");static char *whom = "Tekkaman Ninja";static int howmany = 1;static int TNparam[] = {1,2,3,4};static int TNparam_nr = 4;module_param(howmany, int, S_IRUGO);module_param(whom, charp, S_IRUGO);module_param_array(TNparam , int , &TNparam_nr , S_IRUGO);static int hello_init(void){    int i;    for (i = 0; i < howmany; i++)        printk(KERN_ALERT "(%d) Hello, %s ！/n", i, whom);    for (i = 0; i < 8; i++)        printk(KERN_ALERT "TNparam[%d] : %d /n", i, TNparam[i]);    return 0;}static void hello_exit(void){    printk(KERN_ALERT "Goodbye, Tekkaman Ninja ！/n Love Linux !Love ARM ! Love KeKe !/n");}module_init(hello_init);module_exit(hello_exit);

[Tekkaman2440@SBC2440V4]#cd /lib/modules/[Tekkaman2440@SBC2440V4]#lscs89x0.ko hello.ko prism2_usb.kohello-param.ko p80211.ko[Tekkaman2440@SBC2440V4]#insmod hello-param.ko howmany=2 whom="KeKe" TNparam=4,3,2,1(0) Hello, KeKe ！(1) Hello, KeKe ！TNparam[0] : 4TNparam[1] : 3TNparam[2] : 2TNparam[3] : 1TNparam[4] : 1836543848TNparam[5] : 7958113TNparam[6] : 1836017783TNparam[7] : 0[Tekkaman2440@SBC2440V4]#insmod hello-param.ko howmany=2 whom="KeKe"  TNparam=4,3,2,1,5,6,7,8TNparam: can only take 4 argumentshello_param: `4' invalid for parameter `TNparam'insmod: cannot insert 'hello-param.ko': Invalid parameters (-1): Invalid argument[Tekkaman2440@SBC2440V4]#  

[Tekkaman2440@SBC2440V4]#insmod hello-param.ko howmany=2 whom="KeKe" TNparam=4,3,2,1,5,6,7,8(0) Hello, KeKe ！(1) Hello, KeKe ！TNparam[0] : 4TNparam[1] : 3TNparam[2] : 2TNparam[3] : 1TNparam[4] : 5TNparam[5] : 6TNparam[6] : 7TNparam[7] : 8[Tekkaman2440@SBC2440V4]#