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Re: [Patch] Don't relocate compressed sections
- From: Frank Ch. Eigler <fche at redhat dot com>
- To: elfutils-devel at lists dot fedorahosted dot org
- Date: Wed, 28 Mar 2012 13:43:30 -0400
- Subject: Re: [Patch] Don't relocate compressed sections
> I haven't yet given it the due consideration. Even if the best thing for
> the moment is just to punt, there is probably a cleaner way to do it.
> To begin with, I'm still waiting to hear where ET_REL files with
> .zdebug_* sections come from.
They are not hard to prepare by hand. A robust toolkit should not
corrupt its own data just because they are unusual.
> > Could a dubious enough input file include
> > relocation instructions that cause less mellow errors -
> > ie. overwriting data other than the .z* section contents?
> Relocation is per-section, so that's not possible. (The relocate code will
> already diagnose DWFL_E_BADRELOFF if an r_offset field points past the end
> of the section, as some might since the compressed section has shrunk since
> the relocs were generated.)
Does the code correctly treat the "end of the section" values as being
pre-compression vs. post-compression?