| Date | Thu, 19 Sep 2013 01:31:02 -0700 | From | Andi Kleen <> | Subject | Re: [PATCH 01/11] x86: Use asm goto to implement better modify_and_test() functions |
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On Wed, Sep 18, 2013 at 02:02:37PM -0500, H. Peter Anvin wrote: > Yes, a bit sad. We allow bracketing with the get/put_user_try/catch blocks, but that is x86-specific. > > I don't think a generic option is possible without compiler support, but it might be possible to do better than we do know.
Letting the compiler do it is a bit risky, because it may open it up for really large blocks, thus defeating the security advantages.
-Andi
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