I built a sample run/printf and run/nested_init to test serial output on the Raspberry Pi. Funnily enough, I got a console output when I built it a week back. The same compilation doesn't work now. I don't see any output at all. What could have gone wrong? (I copied the boot folder of the default firmware to my SD card) I pasted genode.img after running the objcopy command as well. Any input would be helpful. 

Thanks

Aditya