Printable View
Well after a while of reading,reading and some more reading i thought id share how-to creat a Loadable Kernel Module.
Lets begin with creating a simple C program.
%vi hello.c
#include <linux/module.h>
#if defined(CONFIG_SMP)
#define __SMP__
#endif
#if defined (CONFIG_MODVERSIONS)
#define MODVERSIONS
#include <linux/modversions.h>
#endif
#include <linux/kernel.h>
int int_module (void)
{
connection got dropped....heres the rest.
printk (KERN_DEBUG "Hello,kernel!\n);
connection got dropped....heres the rest.
printk (KERN_DEBUG "Hello,kernel!\n);
return 0;
}
void cleanup_module(void)
{
Guys sometimes i hate friggin computers.....
Lets begin with creating a simple C program.
%vi hello.c
#include <linux/module.h>
#if defined(CONFIG_SMP)
#define __SMP__
#endif
#if defined (CONFIG_MODVERSIONS)
#define MODVERSIONS
#include <linux/modversions.h>
#endif
#include <linux/kernel.h>
int int_module (void)
{
printk(KERN_DEBUG "Hello, World! \n);
return 0;
}
void cleanup_module (void)
{
printk(KERN_DEBUG "Good-bye, World! \n";
}
Now do a gcc -D__KERNEL__ -I/lib/modules/$(uname -r)/build/include -DMODULE -Wall -c hello.c -o hello.o
Next do a insmod hello.o
dmesg | tail -n1 will show you your message
lsmod will show you all of the loaded modules
rmmod will take out any module you want
You know, you can always delete your old posts ;) And there is always a cut and paste by writing it in vi first.
Anyway, never wrote my own kernal mod, but I have installed them a few times. This was a really good, basic tut....
But i think having 2 half completed posts adds character to my posts ;)
Funny enough my last one i did exactly that wrote it in vi and pasted it .
But im glad you liked my tut. It really is an intro into in to LKM.
Im getting a little better at writing them but they can be punks !
er, it seems there were a few typos in the code, so I fixed them?
#include <linux/module.h>
#if defined(CONFIG_SMP)
#define __SMP__
#endif
#if defined (CONFIG_MODVERSIONS)
#define MODVERSIONS
#include <linux/modversions.h>
#endif
#include <linux/kernel.h>
int int_module (void)
{
printk(KERN_DEBUG "Hello, World! \n");
return 0;
}
void cleanup_module (void)
{
printk(KERN_DEBUG "Good-bye, World! \n");
}