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faults in a kext

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faults in a kext

Subject: faults in a kext
From: Joshua LeVasseur <email@hidden>
Date: Wed, 1 Mar 2006 16:22:50 +0100

I'm experimenting with kext development on x86, and I'd like to know how Darwin handles faults that occur due to instructions executed by my kext, particularly the general protection fault. I don't have an x86 Apple machine, and am using a friend's machine, which I'd like to avoid crashing.

Does Darwin halt the kernel if a kext raises a GP? Does Darwin survive, but terminate a kext if the kext raises a GP? Is it possible to tell Darwin that a particular instruction may raise a GP, and if it does raise a GP, then Darwin should call my dedicated error handler that cleans up and returns the system to a nominal state?

-Josh


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