linux-kernel - SDIV / UDIV Question

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Message-ID: <35FD53F367049845BC99AC72306C23D1014D1A0971AC@CNBJMBX05.corpusers.net>
Date:	Wed, 9 Oct 2013 15:08:05 +0800
From:	"Wang, Yalin" <Yalin.Wang@...ymobile.com>
To:	'Will Deacon' <will.deacon@....com>
CC:	"'linux-arm-msm-owner@...r.kernel.org'" 
	<linux-arm-msm-owner@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: SDIV / UDIV  Question

Hi  Will

I have a question about sdiv/ udiv  instructions :
In  armv7 A/R  TRM, it said sdiv/udiv will cause 
Divide by zero as undefined exception or just return zero
(decided by implementation) .

So  in kernel ,  should we need register a undef hook to 
Get this undef exception and send SIGFPE to user space
Process ?  


Thanks 




Yalin.Wang
Software Engineer 
OS Kernel&Graphics
 
Sony Mobile Communications
Tel: +86 10 5966 9819
Phone: 18610323092
Address: No.16 Guangshun South Street, Chaoyang, Beijing, P.R.C.

sonymobile.com
  
 


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