linux-kernel - Re: [PATCH 3/4] x86/insn: Extract more information about instructions

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Message-ID: <534DFEDC.8090503@zytor.com>
Date:	Tue, 15 Apr 2014 20:54:04 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Sasha Levin <sasha.levin@...cle.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
CC:	vegard.nossum@...cle.com, penberg@...nel.org,
	jamie.iles@...cle.com, mingo@...hat.com, tglx@...utronix.de,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	linux-mm@...r.kernel.org
Subject: Re: [PATCH 3/4] x86/insn: Extract more information about instructions

On 04/15/2014 08:47 PM, Sasha Levin wrote:
> 
> Yes, if kmemcheck for some reason needs to figure out if an instruction
> is a MOV variant we'll need to list quite a few mnemonics, but that list
> will be much shorter and more readable than a corresponding list of opcodes.
> 

You're completely missing my point.  If you are looking at MOV, with
80%+ probability you're doing something very, very wrong, because you
will be including instructions that do something completely different
from what you thought.

This is true for a lot of the x86 instructions.

	-hpa


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