From owner-freebsd-sparc64@FreeBSD.ORG  Thu Sep 23 13:24:39 2004
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Date: Thu, 23 Sep 2004 17:24:35 +0400
From: Andrew Belashov <bel@orel.ru>
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To: Daniel Eischen <deischen@freebsd.org>
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Subject: Re: Bug in kse_switchin()?
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Daniel Eischen wrote:
> On Thu, 23 Sep 2004, Andrew Belashov wrote:
> 
> 
>>Daniel Eischen wrote:
>>
>>>Wouldn't you also see same behavior (bugs) in other things, like
>>>getcontext(), setcontext(), and swapcontext() (kern_context.c)?
>>
>>No. uap structure is not used after set_mcontext().
> 
> 
> Have you tried copying the uap (flags, tmbx) before setting
> the context and using the copy thereafter?

Yes. It solves a problem in this place.
However libkse does not work again...