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Add support for .note.gnu.property sections.

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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.
This commit is contained in:
Cary Coutant 2018-06-22 09:27:39 -07:00
parent 8e7767e3f7
commit 6c04fd9b2f
17 changed files with 693 additions and 38 deletions
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19
elfcpp/elfcpp.h
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@ -984,7 +984,9 @@ enum
NT_GNU_BUILD_ID = 3,
// The version of gold used to link. Th descriptor is just a
// string.
NT_GNU_GOLD_VERSION = 4
NT_GNU_GOLD_VERSION = 4,
// Program property note, as described in "Linux Extensions to the gABI".
NT_GNU_PROPERTY_TYPE_0 = 5
};
// The OS values which may appear in word 0 of a NT_GNU_ABI_TAG note.
@ -999,6 +1001,21 @@ enum
ELF_NOTE_OS_SYLLABLE = 5
};
// Program property types for NT_GNU_PROPERTY_TYPE_0.
enum
{
GNU_PROPERTY_STACK_SIZE = 1,
GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2,
GNU_PROPERTY_LOPROC = 0xc0000000,
GNU_PROPERTY_X86_ISA_1_USED = 0xc0000000,
GNU_PROPERTY_X86_ISA_1_NEEDED = 0xc0000001,
GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002,
GNU_PROPERTY_HIPROC = 0xdfffffff,
GNU_PROPERTY_LOUSER = 0xe0000000,
GNU_PROPERTY_HIUSER = 0xffffffff
};
} // End namespace elfcpp.
// Include internal details after defining the types.