[Bug binutils/30880] readelf..debug-dump=loc displays bogus base addresses

[sevaa at sprynet dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30880

--- Comment #1 from Vsevolod Alekseyev <sevaa at sprynet dot com> ---
Took a closer look. There are, essentially, three flavors of loclist dumping
implemented there:

 - V4 (in display_loc_list())
 - V5 with no offsets in unit header (in display_loclists_list())
 - V5 by offsets (in display_offset_entry_loclists())

The latter is implemented naively. It doesn't take trace loclists back to CUs
in debug_info and is, therefore, incapable of properly decoding
DW_LLE_base_addressx, DW_LLE_startx_endx and other forms that reach back into
the top DIE of the home CU.

The only thing display_offset_entry_loclists() does that the other parser does
not is displaying the list of entry offsets. That's a trivial fix.

I'm going to get rid of display_offset_entry_loclists() altogether and make the
rest output unit headers in a compatible way.

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