From owner-freebsd-bugs@FreeBSD.ORG  Wed Jul 26 06:56:39 2006
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From: David Xu <davidxu@freebsd.org>
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Date: Wed, 26 Jul 2006 14:56:33 +0800
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Cc: freebsd-gnats-submit@freebsd.org,
	Christoph Mallon <christoph.mallon@gmx.de>
Subject: Re: kern/100774: libthr + gdb + triggered breakpoint results in
	panic
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On Tuesday 25 July 2006 14:52, Christoph Mallon wrote:
> David Xu wrote:
> > On Monday 24 July 2006 19:20, Christoph Mallon wrote:
> >>> Number:         100774
> >>> Category:       kern
> >>> Synopsis:       libthr + gdb + triggered breakpoint results in panic
> >
> > Do you have kernel backtrace ?
> >
> > David Xu
>
> No, sorry.
> I just compiled a new kernel (sources from today, 20060725) with DDB
> support, but the problem doesn't occur there.
>
> 	Christoph
> _______________________________________________
>
This might be fixed by the change:
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/i386/i386/ptrace_machdep.c.diff?r1=1.3.2.1&r2=1.3.2.2&f=h

But I am not sure, though I had seen kernel crashed when debugging
applications using floating-point, I doubt gdb sometimes messed mxcsr
register.

David Xu