[PATCH] elf: Strip zero-sized dynamic sections
Alan Modra
amodra@gmail.com
Mon Apr 20 09:35:47 GMT 2020
On Sat, Apr 18, 2020 at 09:51:53AM -0700, H.J. Lu wrote:
> On Fri, Apr 17, 2020 at 5:26 PM Alan Modra <amodra@gmail.com> wrote:
> >
> > On Fri, Apr 17, 2020 at 10:57:04AM -0700, H.J. Lu wrote:
> > > Any ideas why ppc64 backend generates zero-sized relocation section:
> > >
> > > tmpdir/libcomm-data.so:
> > > ...
> > > [ 5] .rela.dyn RELA 0000000000000160 000160
> > > 000000 18 A 3 0 8
> > > ...
> > >
> > > Is this required by psABI?
> >
> > No, it just looks to be something that isn't tidied. The .rela.dyn
> > output section is created due to .rela.branch_lt being created as a
> > dynamic section, and not being sized early enough for
> > size_dynamic_sections to set SEC_EXCLUDE. I'll see if I can make it
> > go away.
> >
>
> I opened:
>
> https://sourceware.org/bugzilla/show_bug.cgi?id=25849
>
> Here is a patch. OK for master?
I don't think readelf should warn until all ELF targets are tidied.
If someone sees a warning on alpha-linux, say, they have no way to
avoid producing object files that give a warning.
--
Alan Modra
Australia Development Lab, IBM
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