[branch patch] dwarf-frame.c support for .eh_frame_hdr

[Roland McGrath]

> Is there a way to tell if there is a table? 

Sure, my code does check that (size_of_encoded_value returns 0 in that
case).  It's just that if there is no table, I don't think there is
anything else useful to try.  AFAIK it's not a practical concern.  It's
just something that struck me when I came across it.

> I see that the symfile.c change is a good way to test the code, and to
> verify that the stuff that ends up in the core file makes sense. This
> new add-symbol-file command required to read the symbols info from the
> core file is however a bit of a departure from the standard way core
> files are treated in gdb.  It also not entirely clear to a user that
> it would be necessary to issue it.

I never suggested that users do such a thing.  I did it myself to test the
dwarf-frame.c changes, and included the symfile.c patch so that other could
demonstrate for themselves that the .eh_frame_hdr decoding in fact works.
(If you catch up with your mailbox, you'll notice that today I posted the
patch I wrote later last night to implicitly do it for all core files.)


Thanks,
Roland