The source code for the stack unwinder is released as public domain. 
This means that there is no copyright and anyone is able to take a 
copy for free and use it as they wish, with or without modifications,
and in any context they like, commercially or otherwise. 

The only limitation is that I don't guarantee that the software is fit
for any purpose or accept any liability for it's use or misuse - 
the software is without warranty.

Michael McTernan
Michael.McTernan.2001@cs.bris.ac.uk