Re: [Xenomai-help] trap exceptions in user

[Philippe Gerum <rpm@xenomai.org>]

Gabriele Moabiti wrote:
> 
>>Yes, but I still think this is useless. If your user-space code expects
>>to be running from 1MB to 16MB, it expects this for virtual addresses,
>>not for physical addresses. So, I really think you should mmap the 1MB
>>to 16MB region by passing the start address to mmap with the MMAP_FIXED
>>flag.
> 
> I know my way to solve this problem is very strange but there are some
> reasons.
> It is done for compatibility reasons (DMA and a strange architecture
> with custom gdt entries needed by the asm blob...)
> In this application I don't need contiguous physical addresses so I will
> try the mmap fixed way.
> I didn't only want to fork the driver but it is not a big problem...
> 
>>You should trace the exception path in the I-pipe patch to find the
>>point where your exception handling callback is not called.
> 
> will it be a large print work or there are another ways to do that? :)
> 

You may want to have a look at the I-pipe tracer:

http://www.xenomai.org/index.php/I-pipe:Tracer

>     Gabriele
> 
> 
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-- 
Philippe.