Control Flow information query

Hi,
Can anyone suggest how the CFI instructions are used to provide necessary information to the debugger ( lldb ) through the respective dwarf entries for CFI? It will be better if someone can point out to the implementation details .
Thanks,
Siddharth

Sorry mistake in the previous mail sent . Its query about call frame information.
Hi,
Can anyone suggest how the CFI instructions are used to provide necessary information to the debugger ( lldb ) through the respective dwarf entries for CFI? It will be better if someone can point out to the implementation details .
Thanks,
Siddharth