What causes the "IU in error mode (tt =0x2b)" error and what does it mean?

mike antispam21 at verizon.net
Wed Jun 30 18:36:37 UTC 2010

Trap 0x2b is 'data store error'. Did it write to something that it 

Gardner, Michael T wrote:
> I’m running an application on a LEON3 processor using the POSIX API 
> with rtems 4.10. The application is loaded and started using grmon. 
> After some time I see the following error:
> IU in error mode (tt = 0x2b)
> 40018688 820860ff and %g1, 0xff, %g1
> Can someone explain what this error means, what causes the error, and 
> what might be done to resolve it?
> Michael T. Gardner
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