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Re: emulating no-senders notifications in L4?

From: Espen Skoglund
Subject: Re: emulating no-senders notifications in L4?
Date: Fri, 21 Dec 2001 20:44:18 +0100

[Thomas Bushnell]
> Ondrej Hurt <address@hidden> writes:
>>> And a task can not die violently since if it raises an exception
>>> this exception is delivered to an exception handler thread which
>>> can handle this situation.
>> The exception handler can get stuck itself somewhere and can ignore
>> exception IPC forever.

> Not a problem; we would just require that this exception handler be
> a trusted entity.

> For this to work, it must be impossible for an unprivileged task to
> change its exception handler.  In Mach, anyone can change their own
> exception handler; in the proposed L4 scheme, will that still be so?



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