StackFramePointer
virtual target_addr_t StackFramePointer() const = 0;
x86State->ebp = StackFramePointer();
virtual target_addr_t StackFramePointer() const;
x64State->rbp = StackFramePointer();
virtual target_addr_t StackFramePointer() const;
if (!_HasExitedFrame(cpuState->StackFramePointer())) {
->StackFramePointer(), fPreviousFrameAddress);