exception handling in kernel code

[Stanislav Sedov]

On Mon, 14 Aug 2006 09:32:57 -0400
John Baldwin <jhb at freebsd.org> mentioned:
> 
> You can make use of pcb_onfault to recover from a page fault, but that's
> about it.  Kernel code is expected to not generate exceptions. :)
> 

Thanks a lot! I'll try it.

To clarify:

I've implemented driver to allow user-level code to read MSRs (Model
specific registers) (like linux's /dev/cpu/msr). It's required for
some programs like x86info.

As long as not all MSRs documented and reading/writing unexistent MSR
leads to GP fault, I need to recover in that case.

-- 
Stanislav Sedov         MBSD labs, Inc.         <ssedov at mbsd.msk.ru>
Россия, Москва         http://mbsd.msk.ru

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