[PATCH 3/3] csu: Move static pie self relocation later [BZ #27072]

H.J. Lu hjl.tools@gmail.com
Thu Jan 7 12:36:22 GMT 2021


On Thu, Jan 7, 2021 at 3:04 AM Szabolcs Nagy via Libc-alpha
<libc-alpha@sourceware.org> wrote:
>
> On targets where hidden symbol access does not need RELATIVE
> relocs, move the static pie self relocation after tunables and
> cpu features are set up.  This allows processing IRELATIVE
> relocs with correct ifunc dispatch logic.
>
> Unfortunately it is hard to guarantee that there will be no
> dynamic relocations in the early start up code, so this is a
> bit fragile. Ideally the RELATIVE relocs would be processed as
> early as possible and IRELATIVE relocs after cpu features are
> setup, but in glibc it is hard to separate them into two steps.

x86 linker places IRELATIVE relocations the last:

https://sourceware.org/bugzilla/show_bug.cgi?id=13302

Does your linker have this bug fixed?

-- 
H.J.


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