linux 添加内核模块和应用程序

来源：互联网发布：科瑞明软件编辑：程序博客网时间：2024/05/04 03:29

1.Kernel Module

1.1 add .c file

./kernel_imx/drivers/hello_module/hello.c:

#include <linux/module.h>#include <linux/string.h>static int __init hello_module_init(void){        printk(KERN_DEBUG "hello_module_init\n");        return 0;}static void __exit hello_module_exit(void){        printk(KERN_DEBUG "hello_module_exit\n");}module_init(hello_module_init);module_exit(hello_module_exit);MODULE_LICENSE("GPL");

1.2 add Makefile

./kernel_imx/drivers/hello_module/Makefile:

PWD = $(shell pwd)KERNEL_SRC = /home/xxx/Projects/Android/android4.4.3/kernel_imx/CROSS_COMPILE = /home/xxx/Projects/Android/android4.4.3/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.7/bin/arm-linux-androideabi-obj-m := hello.oall:        make ARCH=arm CFLAGS_MODULE=-fno-pic  CROSS_COMPILE=$(CROSS_COMPILE) -C $(KERNEL_SRC) M=$(PWD) modulesclean:        make ARCH=arm CROSS_COMPILE=$(CROSS_COMPILE) -C $(KERNEL_SRC) M=$(PWD) clean

1.3 compile

cd ./kernel_imx/driver/hello_module

make

1.4 result

2. Application

2.1 add .c file

./kernel_imx/drivers/hello_app/hello_app.c

#include <stdio.h>#include <string.h>#include <fcntl.h>int main(int argc, char *argv[]){    printf("hello app\n");    return 0;}

2.2 add Makefile

./kernel_imx/drivers/hello_app/Makefile

EXEC = hello_appCC := arm-linux-androideabi-gcc#CC := arm-none-linux-gnueabi-gccall:  $(EXEC) $(EXEC): hello_app.c        $(CC)   hello_app.c   -static -o hello_appclean:        rm -f hello_app *.o

ps. need download android NDK and get the toolchain

2.3 compile

cd ./kernel_imx/drivers/hello_app/

make

2.4 result

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