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xen-devel
[Xen-devel] Re: [patch 12/26] Xen-paravirt_ops: Fix patch site clobbers
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To: |
Ingo Molnar <mingo@xxxxxxx> |
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Subject: |
[Xen-devel] Re: [patch 12/26] Xen-paravirt_ops: Fix patch site clobbers to include return register |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Fri, 16 Mar 2007 10:37:44 -0700 |
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Cc: |
Zachary Amsden <zach@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxx, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Chris Wright <chrisw@xxxxxxxxxxxx>, Andi Kleen <ak@xxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> |
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Fri, 16 Mar 2007 10:36:47 -0700 |
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Ingo Molnar wrote:
> * Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
>
>
>> Fix a few clobbers to include the return register. The clobbers set
>> is the set of all registers modified (or may be modified) by the code
>> snippet, regardless of whether it was deliberate or accidental.
>>
>
> i guess we need these paravirt.h clobber fixes for v2.6.21 (VMI) too,
> correct?
No, I don't think so. These aren't gcc-style clobbers, but a marker in
the .parainstruction section about what registers may be clobbered by
the patched in code. VMI doesn't use that info, and/or doesn't clobber
more than is allowed at each site, so it isn't an issue.
J
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