linux-kernel - Re: Undefined Instruction

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Message-ID: <alpine.LRH.2.00.1111022205100.17927@twin.jikos.cz>
Date:	Wed, 2 Nov 2011 22:07:48 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Xin Tong <xerox.time.tech@...il.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Undefined Instruction

On Wed, 2 Nov 2011, Xin Tong wrote:

> If an application contains an undefined instruction to the processor (
> x86 in particular ) how does the operating system handle it. does the
> operating system just kill the process, or it will throw signals,
> trying to recover from it ?

CPU will trap and kernel will send SIGILL to the process.

-- 
Jiri Kosina
SUSE Labs

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