On Tue, Jun 29, 2021 at 09:52:58AM -0700, Richard Henderson wrote:
> On 6/29/21 7:32 AM, Steve McIntyre wrote:
> > Hi Adhemerval,
> >
> > On Mon, Jun 28, 2021 at 04:37:34PM -0300, Adhemerval Zanella wrote:
> > > Peter Jones from Red Hat (pjo...@redhat.com ) seems to working on adding
> > > support for aarch64, by the last common on the thread. His work seems
> > > to be quite recent (6th may), so we might want to check with him if he
> > > is planning to finish this work.
> >
> > AIUI Peter started hacking on this a while back, but he told me he was
> > definitely looking for somebody to restart or pick it up. It's not
> > really his area of expertise. I've added him in CC here...
> >
> > > Another option might to check lld, we have it working on llvm for windows
> > > on aarch64. It might be ready available or require less adjustment than
> > > add the full binutils support.
> >
> > Ideally it would be nice to have more than just objcopy/ld. At the
> > moment debugging builds is awkward; objdump refuses to do anything
> > useful with our binaries, for example.
>
> Basic format support would include objdump. The second level of support
> would be ld with elf input and pecoff output. Third level would be pecoff
> assemble+link.
>
> It shouldn't be difficult to get basic pecoff-arm64 support, which sounds
> like the level that you require for uefi.
Yeah; I *think* that's all basically working in my tree[0] so long as you
don't build multiple PE targets in because of the way epep-arch.h is
done, which won't work right. But it's not all dire; I have actually
linked working EFI binaries with it.
[0] with the caveat that I have no idea what I'm doing and may have done
it all wrong, especially with what appear to be multiple conflicting
layered policies on naming things: pe vs coff vs pecoff vs pe image vs
DLL, pe vs pe32 and pep vs pe32+ vs aieeeeeeeeeeeeeeeeee, plus
"arm64"/"aarch64"/"aa64" madness. All the choices are arbitrary and
I'm willing to paint the bike shed in any color so long as I get to
stop pretending to have a working linker at the end of the day.
--
Peter
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