Messages in this thread | | | Date | Fri, 24 Oct 2014 14:36:10 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [PATCH v9 09/12] x86, mpx: decode MPX instruction to get bound violation information |
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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.
Thanks,
tglx
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