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PowerPC64 DT_RELR

Fangrui Song i@maskray.me
Wed Mar 9 01:25:08 GMT 2022 
On Wed, Mar 2, 2022 at 12:41 AM Alan Modra via Binutils
<binutils@sourceware.org> wrote:
>
> I had a look today at DT_RELR again, and found I need to do some work
> in the linker.  Just keeping addresses of relative relocs isn't
> enough, because data addresses can change between ppc64_elf_size_stubs
> and ppc64_elf_build_stubs.  Anyway, the reason for the email is to
> inform anyone playing with DT_RELR on powerpc64 that the current
> support is definitely experimental!  Also, you might like to apply the
> attached patch to gitlab.com/x86-glibc/glibc users/hjl/relr/master
> branch.  glibc regressions went from 574 to 17.
>
> --
> Alan Modra
> Australia Development Lab, IBM

Thanks for testing it on PowerPC. It seems cleaner to fold
0006-elf-ELF_DYNAMIC_RELOCATE-order-relr-before-rel-rela.patch  into
patch 1.
I adjusted my https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/maskray/relr

H.J. may adjust
https://sourceware.org/pipermail/libc-alpha/2022-March/136783.html
("[PATCH v5 1/5] elf: Support DT_RELR relative relocation format [BZ #27924]")

HJ's series looks good to me
(https://sourceware.org/pipermail/libc-alpha/2022-March/136784.html).
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