Hi all,
this is a first part of my attempt to enable use of dwarf3 .debug_loc 
sections (as generated by GCC's rtlopt-branch) for variable tracking.
With this patch GDB at least doesn't segfault as it did when trying to 
debug a binary with .debug_loc section.
It can already read and parse .debug_loc and then use the appropriate 
first block found for a given DIE for obtaining the SYMBOL_VALUE() in 
newsymbol(). So now it behaves exactly like it did with GCCs that didn't 
emit .debug_loc.
I hope to have a full support (ie. SYMBOL_VALUE that depends on PC) 
available soon.
This was developped in gdb-5.3 but should be usable with mainline with 
no problems.

Comments? Approvals?

Michal Ludvig
-- 
* SuSE CR, s.r.o     * mludvig@suse.cz
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