RFC: unaligned and page-crossing writes in shadow emulate callbacks (was Re: [Xen-devel] Question about alignment check in sh_x86_emulate_write)

[Tim Deegan <Tim.Deegan@xxxxxxxxxx>]

Hi, 

At 13:33 +0000 on 04 Dec (1196775199), Tim Deegan wrote:
> Yes, but you'll probably find you need page-crossing support as well if
> you're emulating arbitrary memory writes.  I believe we have a patch
> somewhere that does that; I'll dig it out and polish it up for -unstable.

Attached.  I took the opportunity to tidy up a bit and move more shared
code out of the write/cmpxchg/cmpxchg8b callbacks into helpers.  This is
smoke-tested but I don't have a test case for your virus-scanner's
behaviour.  Can you check that (a) it seems sane for what you want, and
(b) it actually does something useful?

Cheers,

Tim.

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Citrix Systems.
[Company #5334508: XenSource UK Ltd, reg'd c/o EC2Y 5EB, UK.]

Attachment: crosspage.patch
Description: Text document

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