Esteban Monge

Install dependencies:

yum install gcc kernel-devel

Create module source file:

/*
 *  goku.c - The simplest kernel module.
 */
#include <linux/module.h>       /* Needed by all modules */
#include <linux/kernel.h>       /* Needed for KERN_INFO */
MODULE_LICENSE("GPL");
int init_module(void)
{
        printk(KERN_INFO "Dragon Ball GT...\n");

        /*
         * A non 0 return means init_module failed; module can't be loaded.
         */
        return 0;
}

void cleanup_module(void)
{
        printk(KERN_INFO "Goku SSJ4 es la mejor transformacion...\n");
}

Create the make file:

obj-m += goku.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

Compile the module:

make

Test your module:

lsmod|grep goku
sudo insmod goku.ko
lsmod|grep goku

Great!… but what does? Check:

sudo dmesg

You will see in the output:

[ 7347.651869] Dragon Ball GT...

Unload the module:

sudo rmmod hello.ko
lsmod|grep hello

Check:

sudo dmesg

You will see in the output:

[ 7459.206258] Goku SSJ4 es la mejor transformacion...

Module compilation Linux

Module compilation Linux

Sources