>INT 0 (divide error) or 16 (fpu exception)
>The system hangs.

Maybe it's not too clear: the system hangs if i return RTHAL_EVENT_STOP doing nothing.
The next one is the default behaviour when xenomai manage itself the exception.

>When I pass to xenomai It doesn't handle the exception and relax the thread an propagate
>to linux (I think as expected to do).