re: port-i386/39299: FPU use in signal handlers is unsafe

[matthew green <mrg%eterna.com.au@localhost>]

> The following reply was made to PR port-i386/39299; it has been noted by 
> GNATS.
> 
> From: David Holland <dholland-bugs%netbsd.org@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Cc: 
> Subject: Re: port-i386/39299: FPU use in signal handlers is unsafe
> Date: Mon, 25 Oct 2010 01:44:02 +0000
> 
>  On Wed, Aug 06, 2008 at 02:35:01PM +0000, M.Drochner%fz-juelich.de@localhost 
> wrote:
>   > When a signal handler is called, the FPU is in the state as the
>   > main program left it. In particular, there can be data on the
>   > stack which causes that the stack overflows early.
>  
>  I've been seeing the overt symptom of this again recently (teleporting
>  mouse pointer) - anyone else?

the touchpad on my laptop jumps around a bit, but not quite in the
same way it used to.  instead of jumping to the left always, it just
sometimes ends up elsewhere on the screen.


.mrg.