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

From: cvs-commit at gcc dot gnu.org
Subject: [Bug ld/23169] IFUNC pointer should be allowed in executable
Date: Mon, 14 May 2018 11:03:30 +0000


--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by H.J. Lu <address@hidden>:


commit 4ec0995016801cc5d5cf13baf6e10163861e6852
Author: H.J. Lu <address@hidden>
Date:   Mon May 14 03:55:37 2018 -0700

    x86; Allow IFUNC pointer defined in PDE

    If IFUNC symbol is defined in position-dependent executable, we should
    change it to the normal function and set its address to its PLT entry
    which should be resolved by R_*_IRELATIVE at run-time.  All external
    references should be resolved to its PLT in executable.


        PR ld/23169
        * elf-ifunc.c (_bfd_elf_allocate_ifunc_dyn_relocs): Don't issue
        an error on IFUNC pointer defined in PDE.
        * elf32-i386.c (elf_i386_finish_dynamic_symbol): Call
        * elf64-x86-64.c (elf_x86_64_finish_dynamic_symbol): Likewise.
        * elfxx-x86.c (_bfd_x86_elf_link_fixup_ifunc_symbol): New
        * elfxx-x86.h (_bfd_x86_elf_link_fixup_ifunc_symbol): New.


        PR ld/23169
        * testsuite/ld-ifunc/ifunc-9-i386.d: New file.
        * testsuite/ld-ifunc/ifunc-9-x86-64.d: Likewise.
        * testsuite/ld-ifunc/pr23169a.c: Likewise.
        * testsuite/ld-ifunc/pr23169a.rd: Likewise.
        * testsuite/ld-ifunc/pr23169b.c: Likewise.
        * testsuite/ld-ifunc/pr23169b.c: Likewise.
        * testsuite/ld-ifunc/pr23169c.rd: Likewise.
        * testsuite/ld-ifunc/pr23169c.rd: Likewise.
        * testsuite/ld-ifunc/ifunc-9-x86.d: Removed.
        * testsuite/ld-ifunc/ifunc.exp: Run PR ld/23169 tests.

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