[gold commit] PR 22914: Add support for .note.gnu.property sections

[Cary Coutant]

I've committed this patch to add support for .note.gnu.property sections.

-cary


2018-06-22  Cary Coutant  <ccoutant@gmail.com>

elfcpp/
        PR gold/22914
        * elfcpp.h (NT_GNU_PROPERTY_TYPE_0): New note type.
        (GNU_PROPERTY_*): New Gnu property types.
        * x86_64.h (GNU_PROPERTY_X86_FEATURE_1_IBT)
        (GNU_PROPERTY_X86_FEATURE_1_SHSTK): New x86 feature bits.

gold/
        PR gold/22914
        * layout.cc (Layout::Layout): Initialize gnu_properties_.
        (read_sized_value, write_sized_value): New functions.
        (Layout::layout_gnu_property): New method.
        (Layout::create_notes): Call create_gnu_properties_note.
        (Layout::create_gnu_properties_note): New method.
        * layout.h (Layout::layout_gnu_property): New method.
        (Layout::create_gnu_properties_note): New method.
        (Layout::Gnu_property, Layout::Gnu_properties): New types.
        (Layout::gnu_properties_): New data member.
        * object.cc (Sized_relobj_file::layout_gnu_property_section): New
        method.
        (Sized_relobj_file::do_layout): Handle .note.gnu.property sections.
        * object.h (Sized_relobj_file::layout_gnu_property_section): New
        method.
        * target.h (Target::merge_gnu_property): New method.
        (Target::do_merge_gnu_property): New virtual method.
        * x86_64.cc (Target_x86_64::do_merge_gnu_property): New method.
        * testsuite/Makefile.am (gnu_property_test): New test case.
        * testsuite/Makefile.in: Regenerate.
        * testsuite/gnu_property_a.S: New source file.
        * testsuite/gnu_property_b.S: New source file.
        * testsuite/gnu_property_c.S: New source file.
        * testsuite/gnu_property_main.c: New source file.
        * testsuite/gnu_property_test.sh: New test script.
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