Messages in this thread | | | Date | Thu, 11 Sep 2014 15:32:42 -0700 | From | Dave Hansen <> | Subject | Re: [PATCH v8 07/10] x86, mpx: decode MPX instruction to get bound violation information |
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On 09/11/2014 03:18 PM, Thomas Gleixner wrote: > 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?
Peter asked for it to be done this way specifically:
https://lkml.org/lkml/2014/6/19/411
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