Philippe Gerum authored Sep 25, 2018 and Dmitriy Cherkasov committed Nov 21, 2018

This commit introduces the changes redirecting traps and exceptions to
the interrupt pipeline, so that the co-kernel can be made aware early
on. The co-kernel may then decide whether the fault should be
propagated to the regular kernel for actual handling.

This is typically useful for allowing the co-kernel to downgrade the
current context from the head domain to the root domain, when leaving
the burden of handling major faults to the regular kernel makes more
sense than expecting the co-kernel to reinvent such a wheel
(e.g. memory violations, illegal instructions, divide by zero etc). As
a matter of fact, optimizing latency upon such events would not make
much sense anyway.