Date: Fri, 23 Mar 2018 14:02:04 +0100 From: Olivier Houchard <cognet@ci0.org> To: Adrian Chadd <adrian@freebsd.org> Cc: "Andrey V. Elsukov" <bu7cher@yandex.ru>, FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: crash with ipfw nat on mips32 Message-ID: <20180323130204.GA74266@ci0.org> In-Reply-To: <CAJ-Vmont4vUtBxeLwJsxuapNVyVC1mpzVe-jNbBo3KPnPQLGzg@mail.gmail.com> References: <CAJ-Vmok5G93o4O6Ltb6qiGOKZ=LuxD4YDzvh_tXqmK1XYn%2BiQQ@mail.gmail.com> <f51a9986-d577-649e-d781-28d0f4d06a1d@yandex.ru> <CAJ-Vmok_kpLj6gjR8ScJAT5ySf_p9746g7T%2B8vZwSgyL0G2mrg@mail.gmail.com> <70a569db-fa82-f2f6-61ea-a0d1a3dd9dae@yandex.ru> <20180322130002.GA65574@ci0.org> <CAJ-VmonWadQgk7bWcM9ngWruB=2JaV1AW0-geOYEhpiRvZ9gWQ@mail.gmail.com> <CAJ-VmomPx8WCiR4KaBYa8ecwnF3c9Bw-kY9FjwXuP=EHayastA@mail.gmail.com> <20180322161543.GA66967@ci0.org> <CAJ-Vmont4vUtBxeLwJsxuapNVyVC1mpzVe-jNbBo3KPnPQLGzg@mail.gmail.com>
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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 If the website states that then it is outdated.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
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