Messages in this thread | | | Date | Fri, 12 Sep 2014 00:18:15 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH v8 07/10] x86, mpx: decode MPX instruction to get bound violation information |
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On Thu, 11 Sep 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.
And why is that an argument to add another special purpose decoder?
If a bound violation happens it is completely irrelevant whether the decoder is heavyweight or not.
So unless you come up with a convincing argument why the generic decoder is the wrong place, this won't happen.
Thanks,
tglx
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