Description Alvaro Sanchez-Leon 2016-03-13 13:27:05 EDT

When using memory spaces, a back end may sometimes qualify an address
to specify the memory space this address belongs to e.g. MI interface
however to minimize impacts the memory space may not always be present
e.g. as it will use it to refer to the default memory space.

However DSF-GDB has no means to know what is the default memory space
to apply to e.g. and address resulting from an expression.

This change introduces a new API to request the memory service for the
default memory space.