Hi,

> The following program (example in IEEE Std 1003.1, 2004 Edition)
> dumps core on -current/amd64.  It works fine on i386.  Is this a
> bug?
...

Yes, this looks like a bug.  Especially, the swpacontext routine
looks fishy to me.  I'll try a fix tonight (I currently don't have
my amd64 box with me), if noone else beats me to it.

Ciao,
Wolfgang
-- 
ws@TooLs.DE				Wolfgang Solfrank, TooLs GmbH