Address to function pointer conversion

[michael@ifr16.luftfahrt.uni-stuttgart.de (Michael Paus)]

Hi,

I just stumbled over a little problem. I have a system address and I would 
like to
convert it to an access to function type. How can this be done correctly? 
There is
a generic package System.Address_To_Access_Conversions which takes an
object type and then provides an access to object type and the appropriate
conversion routines from address to access type and  vice versa. But, what is
the object of an access to function type here which I need to instantiate 
this
package? Any suggestions are welcome.

Michael

PS: I currently just use an unchecked conversion which just works fine, but
that's not the answer I am looking for.