Kernel module programming

["Sch"]

Hello everyone! 
 
In my localized version of FreeBSD developer's handbook (russian) I have found a skeleton 
example for writing custom kernel modules. But I can not find it's analog in original english 
version of the handbook. And if I do compile example given, computer stops responding 
immediately as soon as I do "kldload skeleton.ko", so I wanted to see original english version, 
for may be something changed in there, but cannot find it anywhere. Please advise! 
 
Cheers, 
        Sch.