Specifies the call frame that the debugger is currently using as
    reference when displaying source code or decoded instructions, or
    when searching for symbols. By default, this is call frame 0.

    The %CURRENT_SCOPE_ENTRY symbol returns an integer value that
    denotes a call frame on the call stack. Call frame 0 denotes
    the routine at the top of the call stack, where execution is
    suspended. Call frame 1 denotes the calling routine, and so on.