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Date: Mon, 05 Oct 2009 11:09:32 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] unknown symbol __fixunsdfdi
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To: han <hshouqian@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

han wrote:
>     Hello everyone！
> I'm Porting a rtai/linux application to xenomai/linux.  Now I come across a problem：
> when I compile the kernel module of my program，I find a WARNING,
>                     WARNING：“__fixunsdfdi”[freqmod.ko] undefined！
> after compiling，I  insmod the module xeno_native.ko，
> then insmod my kernel module freqmod.ko，then I come across an error：
>             insmod:error inserting 'freqmod.ko':-1 Unknown symbol in module
>     dmesg，it tells me: 
>                      unknown symbol __fixunsdfdi。
>  
>    Before being portted to xenomai/linux (linux-2.6.24,xenomai-2.4.3,gcc-4.1.1)，
> it run ok in rtai/linux （linux-2.6.24，rtai-3.7，gcc-4.1.1），
> and I only transport the RTAI API to Xeno's native API. So what's wrong?  I'm looking forward to your answers! 
>      Thank you very much !

You are using FPU in kernel-space. It is bad. If you really want to do
that, you should import that function from the static libgcc.

-- 
                                          Gilles