>You say yes, then propose to do what I told you was a bad idea. So, I
>repeat: this is a bad idea.

Ok, now it's clear. This a port of a real time application first developed in DOS
then ported to Windows XP so dirty hacking was the rule.
Sorry for the misunderstanding.

> I think it is better not to touch the
>hardware vector and use the trap interception mechanism proposed by
>Xenomai rthal. And split exception handling in a kernel-space handler
>which signals a user-space server thread.

I think I can do the exception handling in a kernel-space handler without pass to an user space server thread
due to the memory of the process where the SIS live (both data and code) is kernel memory mapped in the user space and SIS.

I had read Adeos is the low level of the real time part and Xenomai is one of the possible
domain. Do I Have to use the rthal_trap_catch function to alter Xenomai? Is there some examples
to better understand how to do?
NOTE: I have to used rtnet too. Can this customization alterate the behaviour of rtnet?

Thank you