Re: disabling group leader perf_event

From: Avi Kivity
Date: Tue Sep 07 2010 - 05:14:44 EST


On 09/07/2010 11:33 AM, Stefan Hajnoczi wrote:

Native Client: A Sandbox for Portable, Untrusted x86 Native Code, IEEE
Symposium on Security and Privacy, May 2009
http://nativeclient.googlecode.com/svn/data/docs_tarball/nacl/googleclient/native_client/documentation/nacl_paper.pdf

The "Inner Sandbox" they talk about verifies a subset of x86 code.
For indirect control flow (computed jumps), they introduce a new
instruction that can do run-time checking of the destination address.

Interesting, but appears to rely on x86 segmentation, which isn't available on x86_64.

Removing that requirement means replacing indirect memory access by a new instruction that does run-time checking, like indirect control flow, which is likely to kill performance.

--
error compiling committee.c: too many arguments to function

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