[Bug ld/19368] [2.26/2.27 regression] IFUNC support not working on arm-linux-gnueabi*

[jiwang at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=19368

Jiong Wang <jiwang at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|DUPLICATE                   |---

--- Comment #5 from Jiong Wang <jiwang at gcc dot gnu.org> ---
Looks to me ARM target has two issues on IFUNC support.

  1 Sometimes STT_GNU_IFUNC symbols haven't gone through PLT.
    We force STT_GNU_IFUNC to go through PLT to workaround the relocation
    order issue by utilizing lazy relocation.

    This is the issue caused the segment fault in this PR.

  2 IRELATIVE should be put in the last in .rel.plt.
    This is a further improvement we should done after issue 1 addressed.
    Simliar improvement has been done on x86 by PR13302.

To fix this PR, we need to fix issue 1 first.  So this PR is not purely a
duplicate of PR13302 which only caused by issue 2.

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