On 09/19/2013 03:31 AM, Andi Kleen wrote:
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
The compiler support. if done right, should avoid unannotated memory
references. This is a pretty big job in the compiler, though.
-hpa
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