linux-kernel - Re: Undefined Instruction

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Message-ID: <CALKntY2yJm1Usi60dbZo-8OmfpfZp4AELFbw7QH5QsgvjFLdCQ@mail.gmail.com>
Date:	Wed, 2 Nov 2011 17:14:17 -0400
From:	Xin Tong <xerox.time.tech@...il.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Undefined Instruction

There must be a default handler install for every application on linux
, right  ? Is there any signal that the operating system simply kills
the programs without sending a signal to the user level ?

Thanks

Xin

On Wed, Nov 2, 2011 at 5:10 PM, Jiri Kosina <jkosina@...e.cz> wrote:
> On Wed, 2 Nov 2011, Xin Tong wrote:
>
>> If i change the kernel, i could have the application stary alive right ?
>
> No need for any kernel changes. You can set your own signal handler for
> SIGILL (but iirc that will make any further behavior of your application
> undefined as long as POSIX is involved).
>
> --
> Jiri Kosina
> SUSE Labs
>
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