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[Bug ld/27905] qemu: ./src/hw/megasas.c:168:(.text.megasas_process_op+0x


From: cvs-commit at gcc dot gnu.org
Subject: [Bug ld/27905] qemu: ./src/hw/megasas.c:168:(.text.megasas_process_op+0x3d): relocation
Date: Fri, 28 May 2021 16:35:22 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=27905

--- Comment #8 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 <hjl@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=1273b2f8ac8778f0c6f0f3b492940e3a5bdd7776

commit 1273b2f8ac8778f0c6f0f3b492940e3a5bdd7776
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri May 28 09:34:10 2021 -0700

    x86: Restore PC16 relocation overflow check

    The x86-64 psABI has

    ---
    A program or object file using R_X86_64_8, R_X86_64_16, R_X86_64_PC16
    or R_X86_64_PC8 relocations is not conformant to this ABI, these
    relocations are only added for documentation purposes.
    ---

    Since x86 PC16 relocations have been used for 16-bit programs in an ELF32
    or ELF64 container, PC16 relocation should wrap-around in 16-bit address
    space.  Revert

    commit a7664973b24a242cd9ea17deb5eaf503065fc0bd
    Author: Jan Beulich <jbeulich@suse.com>
    Date:   Mon Apr 26 10:41:35 2021 +0200

        x86: correct overflow checking for 16-bit PC-relative relocs

    and xfail the related tests.  Also revert

    commit 50c95a739c91ae70cf8481936611aa1f5397a384
    Author: H.J. Lu <hjl.tools@gmail.com>
    Date:   Wed May 26 12:13:13 2021 -0700

        x86: Propery check PC16 reloc overflow in 16-bit mode instructions

    while keeping PR ld/27905 tests for PC16 relocation in 16-bit programs.

    bfd/

            PR ld/27905
            * elf32-i386.c: Don't include "libiberty.h".
            (elf_howto_table): Revert commits a7664973b24 and 50c95a739c9.
            (elf_i386_rtype_to_howto): Revert commit 50c95a739c9.
            (elf_i386_info_to_howto_rel): Likewise.
            (elf_i386_tls_transition): Likewise.
            (elf_i386_relocate_section): Likewise.
            * elf64-x86-64.c (x86_64_elf_howto_table): Revert commits
            a7664973b24 and 50c95a739c9.
            (elf_x86_64_rtype_to_howto): Revert commit 50c95a739c9.
            * elfxx-x86.c (_bfd_x86_elf_parse_gnu_properties): Likewise.
            * elfxx-x86.h (elf_x86_obj_tdata): Likewise.
            (elf_x86_has_code16): Likewise.

    binutils/

            PR ld/27905
            * readelf.c (decode_x86_feature_2): Revert commit 50c95a739c9.

    gas/

            PR ld/27905
            * config/tc-i386.c (set_code_flag): Revert commit 50c95a739c9.
            (set_16bit_gcc_code_flag): Likewise.
            (x86_cleanup): Likewise.
            * testsuite/gas/i386/code16-2.d: Updated.
            * testsuite/gas/i386/x86-64-code16-2.d: Likewise.

    include/

            PR ld/27905
            * elf/common.h (GNU_PROPERTY_X86_FEATURE_2_CODE16): Removed.

    ld/

            PR ld/27905
            * testsuite/ld-i386/pcrel16-2.d: xfail.
            * testsuite/ld-x86-64/pcrel16-2.d: Likewise.

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