一个hello程序的android内核模块编译方法及在模拟器中进行测试结论

/*********************************************************************
* Author : Samson
* Date : 03/02/2014
* Test platform:
* Linux ubuntu 3.2.0-58-generic-pae
* GNU bash, version 4.2.39
* *******************************************************************/

hello module source:

#include <linux/init.h>

#include <linux/module.h>

static int hello_init(void)
{
printk(KERN_ALERT "Hello,world\n");
return 0;
}

static void hello_exit(void)
{
printk(KERN_ALERT "Goodbye, cruel world\n");
}

module_init(hello_init);
module_exit(hello_exit);

compile hello.ko module Makefile code:

obj-m := hello.o
all:
make ARCH=arm EXTRA_CFLAGS="-D_CONFIG_ARM_ -fno-pic" -C $(KDIR) M=$(PWD) modules
clean:
$(MAKE) -C $(KDIR) M=$(PWD) cleanhe

Make hello.ko function:

make CROSS_COMPILE=arm-linux-androideabi- KDIR=/opt/hackandroid/goldfish_0228

NOTE: KDIR is kernel path. what's kernel path??? please refer to :http://blog.csdn.net/yygydjkthh/article/details/20172023

tested on android emulator:

run android emulator:

emulator -avd Android4.2.2 -kernel arch/arm/boot/zImage

push hello.ko to emulator:

testhello$ adb push hello.ko /data/local
60 KB/s (2648 bytes in 0.042s)

NOTE: what is zImage? How get the zImage??? please refer to : http://blog.csdn.net/yygydjkthh/article/details/20172023

testhello$ adb shell

[email protected]:/# cd data/local/
[email protected]:/data/local # ls
hello.ko

[email protected]:/data/local # insmod hello.ko
[email protected]:/data/local # dmesg -c

<1>Hello,world
[email protected]:/data/local # lsmod
hello 702 0 - Live 0x00000000 (PO)
[email protected]:/data/local # rmmod hello
[email protected]:/data/local # dmesg -c
<1>Goodbye, cruel world
[email protected]:/data/local # lsmod

[email protected]:/data/local #

<1>Hello,world

so, that's ok, good night :_).

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