#include <linux/module.h>
#include <linux/init.h>

MODULE_LICENSE("GPL");

extern void ton_an(u16 tonwert);
extern char *textbuf;

static void (*ton_an_function)(u16 var);
static char **textbufptr;

static int __init buf_init(void)
{
  ton_an_function = symbol_get(ton_an);
  if (ton_an_function)
    ton_an_function(330);
  else
    printk("can't find address of symbol \"ton_an\"\n");
  textbufptr = symbol_get(textbuf);
  if(textbufptr)
    printk("content of 0x%p: \"%s\"\n", textbufptr, *textbufptr);
  else
    printk("can't find address of symbol \"textbufptr\"\n");
  return 0;
}

static void __exit buf_exit(void)
{
  if (ton_an_function) {
    ton_an_function(0);
    symbol_put(ton_an);
    //symbol_put_addr(ton_an_function); // alternativ zu symbol_put
  }
  if (textbufptr)
    symbol_put(textbuf);
}
				     
module_init(buf_init);
module_exit(buf_exit);