[Bug ld/22929] x86_64 linker seg-faults when creating a shared object from an input containg relocations against note section without SHF_ALLOC

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=22929

--- Comment #11 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by Nick Clifton <address@hidden>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f657f8c4a1dc0ac69b16b1dc6eacbf5286f1f0a0

commit f657f8c4a1dc0ac69b16b1dc6eacbf5286f1f0a0
Author: Nick Clifton <address@hidden>
Date:   Fri Mar 9 14:37:36 2018 +0000

    Fix Sparc, s390 and AArch64 targets so that they can handle relocs against
ifunc symbols found in note sections.

      Following on from PR 22929, I have found the same problem exists with
      other ifunc supporting targets too.  Plus see this link for the bug
      being reported against the s390x binutils for Fedora rawhide:

         https://bugzilla.redhat.com/show_bug.cgi?id=1553705

      So I am going to check in the patch below which applies the same
      change that H.J. made for the x86_64 target to the other affected
      targets.  (Specifically: S390, AArch64 and Sparc).  Plus it adds a new
      test to the linker testsuite to make sure that this problem stays
      fixed.

    bfd * elf64-s390.c (elf_s390_relocate_section): Move check for
        relocations against non-allocated sections to before the code that
        handles ifunc relocations.
        * elf32-s390.c (elf_s390_relocate_section): Likewise.
        * elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Treat
        relocs against IFUNC symbols in non-allocated sections as relocs
        against FUNC symbols.
        * elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise.

    ld  * testsuite/ld-ifunc/ifuncmod5.s: New test.  Checks that targets
        that support IFUNC symbols can handle relocations against those
        symbols in NOTE sections.
        * testsuite/ld-ifunc/ifuncmod5.d: New file:  Driver for the new
        test.
        * testsuite/ld-ifunc/ifunc.exp: Run the new test.

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