/*********************************************************************
* 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
root@android:/# cd data/local/
root@android:/data/local # ls
hello.ko
root@android:/data/local # insmod hello.ko
root@android:/data/local # dmesg -c
<1>Hello,world
root@android:/data/local # lsmod
hello 702 0 - Live 0x00000000 (PO)
root@android:/data/local # rmmod hello
root@android:/data/local # dmesg -c
<1>Goodbye, cruel world
root@android:/data/local # lsmod
root@android:/data/local #
<1>Hello,world
so, that‘s ok, good night :_).