crash with ipfw nat on mips32

[Olivier Houchard]

Hi Adrian,

On Fri, Mar 23, 2018 at 12:46:02AM -0700, Adrian Chadd wrote:
> Hi,
> 
> The stack backtrace looks like a null pointer dereference.
> 

"Stopped at 0". Does that mean the PC is at 0, or just that we tried to
load 0 ?

> The concurrencykit website mentions ARM and MIPS as future ports. Is
> this actually true? Is concurrencykit supposed to actually run on
> ARM/MIPS? Did anyone test? Actual MIPS hardware that we run on is like
> $50. It's not exactly spendy to test out FreeBSD code on real
> hardware. :)
> 

If the website states that then it is outdated. There is a native arm
port for quite some time. As for mips, it only works using gcc builtins,
but it has been tested at some point.

> I can't even build the regression suite from CK on github to run on
> mips32 hardware. I don't suppose anyone would be able to figure that
> particular mess out?
> 

How does it fail ?

> I'd really like to work some more on wifi stack stuff on this embedded
> platform stuff and this just threw a spanner in my plans. I'd really
> appreciate some help here cause I don't have time to wade through more
> platform breakage just to do wifi stack / driver work. I have limited
> spare time as it is these days :(
> 
> Thanks,

I'm certainly willing to help you. 
I'll try to reproduce it with qemu or something. Can you tell me a bit
more about your setup, so that I can get it to happen ?
Unfortunately, I'll be away for the week-end, so probably won't be able
to do so before at least sunday evening (french time).

Regards,

Olivier