AVR-Chat

I'm trying to track down a bug in an existing program. I believe it is 
getting stuck in a loop. Once the error occurs the only way to restore 
communication is to reset the processor. It would help a lot if I could 
locate the place in the code where it is getting stuck. I would like to 
be able to store the Program Counter, Hardware Stack Pointer and Data 
Stack Pointer (Y Register) in EEPROM so I can output them the next time 
the processor boots. The problem is that the code is in C. I am not 
sure how to get a value from a hardware register and store it in a C 
variable. I am using the CodeVisionAVR compiler.  Any ideas?  

Terry