Debian 12 Kernel Module 筆記

安裝編輯環境
apt install -y gcc  linux-headers-$(uname -r)

hello.c 內容
#include <linux/module.h>    /* Needed by all modules */
#include <linux/kernel.h>    /* Needed for KERN_INFO */

int init_module(void)
{
    printk(KERN_INFO "Hello world 1.\n");
    /*
     * A non 0 return means init_module failed; module can't be loaded.
     */
    return 0;
}

void cleanup_module(void)
{    printk(KERN_INFO "Goodbye world 1.\n"); }

MODULE_LICENSE("L");
MODULE_AUTHOR("Taiwan");
MODULE_DESCRIPTION("Taiwan");
MODULE_VERSION("1");

Makefile 內容

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