[Bug ld/23169] IFUNC pointer should be allowed in executable

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23169

--- Comment #10 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The binutils-2_36-branch branch has been updated by H.J. Lu
<hjl@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=e9815c344ef0d24405cfaf9968135ad2180649f8

commit e9815c344ef0d24405cfaf9968135ad2180649f8
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sat Jan 16 07:00:09 2021 -0800

    ld/elf/x86: Don't compare IFUNC address in the shared object

    On x86, glibc 2.33 starts to issue a fatal error message when calling
    IFUNC function defined in the unrelocated executable from a shared
    library.

    1. Update x86 ELF linker to always convert IFUNC function defined in
    position-dependent executable (PDE) to the normal function.  GOT in PDE
    will be updated by R_*_IRELATIVE at run-time.
    2. Update PR ld/23169 tests not to compare function address of external
    IFUNC function in the shared object to avoid calling the IFUNC function
    defined in the unrelocated executable.
    3. Remove pr23169e tests which call the IFUNC function defined in the
    unrelocated position-independent executable from a shared library.

    bfd/

            PR ld/23169
            * elfxx-x86.c (_bfd_x86_elf_link_fixup_ifunc_symbol): Don't
            check pointer_equality_needed.

    ld/

            PR ld/23169
            * testsuite/ld-ifunc/ifunc.exp: Replace pr23169c.rd with
            pr23169a.rd for pr23169c and pr23169f.  Remove pr23169e tests.
            * testsuite/ld-ifunc/pr23169a.c (foo): Don't compare function
            address.

    (cherry picked from commit 75a933f39918ce4f4b9481234992895e022787ee)

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