[Freeswitch-users] Debian packages for ARM/MIPS/POWERPC

[Komar, Jason]

Some of this is a bit of unfamiliar territory for me, but I am learning. I
will try enabling core dumps, etc. and see if I can get some more
information. I will open up a jira ticket in the next couple of days.

Thanks for your help.

Jason


On Thu, Dec 10, 2015 at 4:19 PM, Stanislav Sinyagin <ssinyagin at gmail.com>
wrote:

> if coredumps are not made, you need to enable them, and then install
> debug symbols (-dbg packages), and run gdb on the core fule. Then it
> shoul dindicate the line number in the sources where it crashed.
>
> Here's one suspect: mod_spandsp_fax.c, mod_spandsp_fax_process_fax:
>
>       int16_t *buf = NULL;
> ....
>         buf = switch_core_session_alloc(session,
> SWITCH_RECOMMENDED_BUFFER_SIZE);
>
> are we guaranteed that alloc returns a 16-bit aligned pointer?
>
> I think it makes sense to open a jira ticket anyway
>
>
>
>
>
>
> On Thu, Dec 10, 2015 at 10:51 PM, Komar, Jason <jkomar at jbox.ca> wrote:
> > This is on FreeSWITCH Version 1.6.5+git-20151209T192325Z~70b8c17763~32bit
> > (git 70b8c17 2015-12-09 19:23:25Z 32bit) by the way.
> >
> >
> > On Thu, Dec 10, 2015 at 2:49 PM, Komar, Jason <jkomar at jbox.ca> wrote:
> >>
> >> I get nothing in debug or sip trace. It always dies at mod_spandsp_fax
> so
> >> I figured it was in that module. At that point freeswitch just restarts
> >> without throwing any errors.
> >>
> >> Kernel log shows:
> >>
> >> Dec 10 14:16:17 antman kernel: [ 5949.832802] Alignment trap: not
> handling
> >> instruction ecb17a01 at [<b44fe32c>]
> >> Dec 10 14:16:17 antman kernel: [ 5949.834290] Unhandled fault: alignment
> >> exception (0x001) at 0xb4546e4a
> >>
> >> The only part of the exception that is the same every time it happens is
> >> "instruction ecb17a01."
> >>
> >> I would have just opened a JIRA, but I didn't think this was enough
> >> information. I have been Googling trying to figure out how to get more
> info.
> >>
> >> Jason
> >>
> >>
> >> On Thu, Dec 10, 2015 at 2:37 PM, Stanislav Sinyagin <
> ssinyagin at gmail.com>
> >> wrote:
> >>>
> >>> Hi, I didn't see any errors, but I'm not using fax, and mostly it's
> >>> bridging the calls and connecting users to a conference. Do you have
> more
> >>> debugging information?
> >>>
> >>> Most probably the source of the problem is that x86 allows unaligned
> >>> memory access: a word pointer can have any value. And other
> architectures
> >>> don't allow this, and require the pointers to be aligned to word
> boundaries.
> >>> Mongodb, for example, is known to fail on any non-x86 CPU because of
> that.
> >>>
> >>> So, probably mod_spandsp needs an audit.
> >>>
> >>> On 10 Dec 2015 21:11, "Komar, Jason" <jkomar at jbox.ca> wrote:
> >>>>
> >>>> Your instructions worked great for me building on/for my Odroid-U3
> (arm)
> >>>> running Debian Jessie.
> >>>>
> >>>> I know you are running on arm at scaleway. Do you ever run into any
> >>>> alignment issues? I'm getting alignment exception faults receiving
> faxes and
> >>>> I'm having trouble pulling any useful debug messages.
> >>>>
> >>>> Thanks,
> >>>> Jason
> >>>>
> >>>> On Mon, Nov 30, 2015 at 9:27 AM, Stanislav Sinyagin
> >>>> <ssinyagin at gmail.com> wrote:
> >>>>>
> >>>>> hi,
> >>>>>
> >>>>> I put together the build scenario that I tested for ARM (armhf at
> >>>>> scaleway.com), and it should also work for other architectures:
> >>>>>
> >>>>>
> >>>>>
> https://freeswitch.org/confluence/display/FREESWITCH/Building+debs+for+other+architectures
> >>>>>
> >>>>> It will be great if someone tests them on other architectures too.
> >>>>>
> >>>>>
> >>>>> cheers,
> >>>>> stanislav
> >>>>>
> >>>>>
> >>>>>
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> >>
> >
> >
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