Debugging ATXMega256A3 without AVR studio

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Hi all,
I'm starting a project with the ATXMega256A3(MH) MCU and RF231 radio. I can compile and flash code through the JTAG interface of the AVR MKII Jtag Ice programmer. Under windows I can also debug the running code, but in linux avarice does not provide support for this MCU. I'm hacking the avarice source code to see if I can retrieve data. I managed to run and hold the running process on the MCU via avr-gdb + avarice, but I can't see throughout data nor place breakpoints.. to put it short, I can't debug through avarice..
In attachment you can find the code I've changed in avarice sources (devdescr.cc).

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Ok oK oK... it looks Like I've made it: WITH the code provided above. I'm prepring an official patch to apply to avarice 2.10 and a small HowTo that allows accessing debug via avr-gdb