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The problem is hopefully solved
The problem was the _arch_init code that does gic code. I was unfortunate enough to do late night hacking , and in vane and desperation put in a crash into gicv3.cc :/
Anyway , big thanks for all help , and the pointer to _arch_init. Also the fact that I now know how to get a dump from genode..
Will be very useful later on!
Michael