Re: Fix building on x86 OpenBSD 4.3

[Mark Kettenis <mark.kettenis@xs4all.nl>]

> From: Pedro Alves <pedro@codesourcery.com>
> Date: Wed, 6 Aug 2008 16:10:44 +0100
> 
> Hi,
> 
> In my testing on several targets, I noticed that GDB isn't
> building on x86 OpenBSD 4.3, due to the fact that struct
> switchframe got its sf_ppl member removed, and GDB is trying
> to access it.
> 
> I can't claim I know a think about this, but,
> 
> The patch that seems to have removed it, shows that is was always
> 0 just before removal:
> 
>  http://archive.netbsd.se/?ml=openbsd-tech&a=2007-09&m=5239543
> 
> And I can see it being set to != 0 in that files' history at:
>  http://opengrok.creo.hu/openbsd/history/src/sys/arch/i386/i386/vm_machdep.c
> 
> So, I guess that the attached is the best to do, and I didn't
> notice any breakage.  Of course, I don't even know what
> triggers this code path.  :-)
> 
> Mark, perhaps you have a better fix in your local trees?

Oops, yes I have.  Fixed this and never seemed to have committed the
fix when OpenBSD 4.3 was officially released.  Need to tweak it such
that the file compiles on older OpenBSD releases though.

Thanks for pointing this out.