I began porting this:
http://www.berthels.co.uk/exmap/
and it is here:
http://people.freebsd.org/~bms/dump/exmap.tgz
It needs debugging. Would anyone like to help?
It is a very useful tool for profiling memory sharing between processes.
cheers
BMS
P.S. I'm not on arch or hackers at the moment, please circulate this.