Re: BFD questions

[Toshi Morita <tm2 AT best dot com>]

>    From: Toshi Morita <tm2@best.com>
>    Date: Fri, 17 Sep 1999 15:06:10 -0700 (PDT)
> 
>    > Yes, it should.  However, I'm thinking about the case where we have a
>    > relocation in a .debug section which refers to a symbol which has been
>    > deleted.  The symbol doesn't have a value.  We can't simply remove the
>    > address being relocated, because who knows what that would do.
> 
>    Whoa, stop the presses.
> 
>    Is this case known to happen?
> 
> No.  I mention it as a possibility you may want to consider.
> 
>    If this case happens, what does the data look like?
>    Will the AT_pc_high have a funky value like 0x00000010 in this case?
> 
> It's possible.  If it's trying to store SYM + 0x10, and SYM is in a
> linkonce section which has been discarded, then it's quite possible
> that the debugging information will wind up with the value 0x10.

If I understand correctly, the AT_pc_low and AT_pc_high should be referencing
labels within the same section. If the referenced section was discarded,
then wouldn't both the AT_pc_low and AT_pc_high point to invalid labels?

This case which i'm investigating now has a valid AT_pc_low, but an 
invalid AT_pc_high, which doesn't sound like it fits the symptoms of a
discarded section.

Toshi