Zero value of program counter

program counter (PC) has the address of the currently executing instruction or next instruction in line. for ARMV5, its the former case.

I have encountered the crashes where PC (R15) value is zero. I was wondering if someone can tell me the significance of that. And is there some way (so开发者_Go百科me other register) to find out the address of current instruction.

Any help would be highly appreciated.

Some code probably tried to call a null function-pointer. Check the stack to see where the call came from.

In general (ARM terminology ) it would be a prefetch abort. Means cpu is trying to read (pre-fetch) instruction from illgela address which caused this. you can try to see how tht mem location has become invlid to find out more on the cause !