RealView
DebuggerRealView Debugger uses various internal variables depending on the debug target. For example, if you connect to a target using RealView ICE, the Debug tab looks like this:

There are internal variables relating to RealView ICE, the connected processor, and semihosting information.
For information on the displayed
variables, refer to the RealView ICE
User Guide and the documentation for your target processor.