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Subject: Re: [regression] x86/signal/64: Fix SS handling for signals delivered
 to 64-bit programs breaks dosemu
To: Linus Torvalds <torvalds@linux-foundation.org>,
        Cyrill Gorcunov <gorcunov@gmail.com>
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Cc: Andy Lutomirski <luto@amacapital.net>,
        Pavel Emelyanov <xemul@parallels.com>, Stas Sergeev <stsp@list.ru>,
        Linux kernel <linux-kernel@vger.kernel.org>
From: Raymond Jennings <shentino@gmail.com>
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Date: Thu, 13 Aug 2015 14:42:01 -0700
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On 08/13/15 13:09, Linus Torvalds wrote:
> On Thu, Aug 13, 2015 at 1:08 PM, Cyrill Gorcunov <gorcunov@gmail.com> wrote:
>> If only I'm not missin something obvious this should not hurt us.
>> But I gonna build test kernel and check to be sure tomorrow, ok?
> Thanks,
>
>                   Linus
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I am curious about what's supposed to happen normally on signal delivery.

Is SS a register that's supposed to be preserved like EIP/RIP and CS 
when a signal is delivered?