RE: [PATCH 5/5] x86, mpx: extend siginfo structure to include boundviolation information

From: Ren, Qiaowei
Date: Fri Jan 17 2014 - 09:55:26 EST

> -----Original Message-----
> From: Borislav Petkov [mailto:bp@xxxxxxxxx]
> Sent: Monday, January 13, 2014 6:43 PM
> To: Ren, Qiaowei
> Cc: H. Peter Anvin; Thomas Gleixner; Ingo Molnar; x86@xxxxxxxxxx;
> linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH 5/5] x86, mpx: extend siginfo structure to include bound
> violation information
> On Mon, Jan 13, 2014 at 04:22:27PM +0800, Ren Qiaowei wrote:
> > >I tried to use generic structure and macro, but many members of
> > >generic struct insn are not used for MPX,
> I think that's ok - there are a lot of examples in the kernel where only a subset
> of the struct members are used by a particular functionality.
> > Because only struct insn_field and several macros may be replaced with
> > generic version, I guess it maybe be confused easily to include
> > generic insn header. What do you think about it?
> Yes, I think the idea is to use and, if needed, extend the generic functionality
> instead of growing our own here and there for obvious benefits.
Yes, I once tried to use and extend the generic functionality to implement the decoding, but I noticed it didn't work out well for this specific MPX case. Anyway, I will try to use generic version more.

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