On 10/28/2014 04:36 AM, Thomas Gleixner wrote:
On Mon, 27 Oct 2014, Ren, Qiaowei wrote:
On 2014-10-24, Thomas Gleixner wrote:
On Sun, 12 Oct 2014, Qiaowei Ren wrote:
This patch sets bound violation fields of siginfo struct in #BR
exception handler by decoding the user instruction and constructing
the faulting pointer.
This patch does't use the generic decoder, and implements a limited
special-purpose decoder to decode MPX instructions, simply because
the generic decoder is very heavyweight not just in terms of
performance but in terms of interface -- because it has to.
My question still stands why using the existing decoder is an issue.
Performance is a complete non issue in case of a bounds violation and
the interface argument is just silly, really.
As hpa said, we only need to decode several mpx instructions
including BNDCL/BNDCU, and general decoder looks like a little
heavy. Peter, what do you think about it?
You're repeating yourself. Care to read the discussion about this from
the last round of review again?
Ok. I will go through it again. Thanks.
- Qiaowei
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