exception handling in kernel code

[John-Mark Gurney]

Stanislav Sedov wrote this message on Mon, Aug 14, 2006 at 19:47 +0600:
> 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.

You should make a MD API for reading these out (if one doesn't already
exist) that handle the faulting for you, and then have your driver hook
into this api...

I had to do something similar for accessing PCI config registers
that don't exist and cause a fault...

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."