Re: [Xenomai-help] 32 bits libraries for x86_64 architecture

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 07/07/2011 11:40 AM, Kim Mathiassen wrote:
> Hi
> 
> I am doing a project where I am going to use Labview for linux. 
> Unfortunately Labview only have a 32-bit version and I have a 64 bit 
> system. I want to use Xenomai with Labview for DAQ, and therefor I need 
> 32 bits libraries that Labview can call. I read a message in the 
> mailing-list which where of a similar character:
> 
> https://mail.gna.org/public/xenomai-help/2008-05/msg00294.html
> 
> I have tried to compile the user-space Xenomai libraries with the m32 
> option, but I only get -ENOSYS error which implies that the function is 
> not implemented. Is there any plan to implement 32 bit wrappers for a 64 
> bit system? Do I have to install a 32 bit kernel in order to use Xenomai 
> with Labview? Does anyone have a suggestion on how to solve the problem?
> 
> I the message the linked to above, it was suggested that I could 
> implement the wrappers. Does anyone know about how much work this would 
> be? If it isn't a lot of work, maybe someone could point me to where in 
> the code I should start looking.
> 
> I am also thinking of making a 64 bit deamon that a 32 bit library can 
> communicate with. I am not sure if this will work, because I do not know 
> if there are IPC (InterProcess Communication) that can handle both 32 
> and 64 bit on Linux?

No Xenomai service is currently implemented in 32 bits mode. It is a ton
of work to do so, because you need to write wrappers for all the system
calls, and there are probably a handful of hundreds of them (a grep | wc
gives 433).

So, currently, it seems easier to use either a complete 64 bits or  to a
complete 32 bits system, not a mix of both.

-- 
                                                                Gilles.