offline elfutils processing committed

[Roland McGrath]

Go team!  When I added the elfutils support for relocatability in August of
last year, I was really hoping someone would start testing it one day. ;-)

Is "somewhat longer" not an understatement?  When I use elfutils'
tests/dwflmodtest with -K (offline kernel, 1389 modules) vs -k (running
kernel, 64 modules) it takes about 17 times longer (mostly i/o).  Note that
dwfl_linux_kernel_report_offline lets you supply a predicate to exclude
uninteresting modules, which is the only way I've thought of to reduce the
DWARF-loading overhead (without changing the way we install it).

You didn't change dwflpp::emit_address, which is used for things like
$global_var addresses.  That needs to emit references to your run-time
section addresses too.


Thanks,
Roland