[PATCH] libdw: Restructure address range reading for .debug_loc and .debug_ranges.

[Mark Wielaard]

On Fri, 2018-04-06 at 14:27 +0200, Mark Wielaard wrote:
> This caches the CU base address, makes error checking slight more relaxed
> and restructures the code so it will be easier to add different forms
> of ranges. Adds a new test for the new CU base address code.

Pushed to master.