Add support for displaying and merging GNU_BUILD_NOTEs.

include	* elf/common.h (SHF_GNU_BUILD_NOTE): Define.
	(NT_GNU_PROPERTY_TYPE_0): Define.
	(NT_GNU_BUILD_ATTRIBUTE_OPEN): Define.
	(NT_GNU_BUILD_ATTRIBUTE_FUN): Define.
	(GNU_BUILD_ATTRIBUTE_TYPE_NUMERIC): Define.
	(GNU_BUILD_ATTRIBUTE_TYPE_STRING): Define.
	(GNU_BUILD_ATTRIBUTE_TYPE_BOOL_TRUE): Define.
	(GNU_BUILD_ATTRIBUTE_TYPE_BOOL_FALSE): Define.
	(GNU_BUILD_ATTRIBUTE_VERSION): Define.
	(GNU_BUILD_ATTRIBUTE_STACK_PROT): Define.
	(GNU_BUILD_ATTRIBUTE_RELRO): Define.
	(GNU_BUILD_ATTRIBUTE_STACK_SIZE): Define.
	(GNU_BUILD_ATTRIBUTE_TOOL): Define.
	(GNU_BUILD_ATTRIBUTE_ABI): Define.
	(GNU_BUILD_ATTRIBUTE_PIC): Define.
	(NOTE_GNU_PROPERTY_SECTION_NAME): Define.
	(GNU_BUILD_ATTRS_SECTION_NAME): Define.
	(GNU_PROPERTY_STACK_SIZE): Define.
	(GNU_PROPERTY_NO_COPY_ON_PROTECTED): Define.
	(GNU_PROPERTY_X86_ISA_1_USED): Define.
	(GNU_PROPERTY_X86_ISA_1_NEEDED): Define.
	(GNU_PROPERTY_X86_ISA_1_486): Define.
	(GNU_PROPERTY_X86_ISA_1_586): Define.
	(GNU_PROPERTY_X86_ISA_1_686): Define.
	(GNU_PROPERTY_X86_ISA_1_SSE): Define.
	(GNU_PROPERTY_X86_ISA_1_SSE2): Define.
	(GNU_PROPERTY_X86_ISA_1_SSE3): Define.
	(GNU_PROPERTY_X86_ISA_1_SSSE3): Define.
	(GNU_PROPERTY_X86_ISA_1_SSE4_1): Define.
	(GNU_PROPERTY_X86_ISA_1_SSE4_2): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX2): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX512F): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX512CD): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX512ER): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX512PF): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX512VL): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX512DQ): Define.
	(GNU_PROPERTY_X86_ISA_1_AVX512BW): Define.

binutils* readelf.c (get_note_type): Add support for GNU_BUILD_NOTEs.
	(get_gnu_elf_note_type): Add support for GNU_PROPERTY_NOTEs.
	(decode_x86_isa): New function.
	(print_gnu_property_note): New function.
	(print_gnu_note): Handle GNU_PROPERTY_NOTEs.
	(print_gnu_build_attribute_description): New function.
	(print_gnu_build_attribute_name): New function.
	(process_note): Add support for GNU_BUILD_NOTEs.
	* objcopy.c (--merge-notes): New command line option.
	(copy_options): Add merge-notes.
	(copy_usage): Likewise.
	(is_merge_note_section): New function.
	(merge_gnu_build_notes): New function.
	(copy_object): Merge note sections if asked to do so.
	(skip_section): Add skip_copy parameter.  Add support for skipping
	merged note sections.
	(copy_relocations_in_section): Update call to skip_section.
	(copy_section): Likewise.
	(copy_main): Add support for merge-notes option.
	* doc/binutils.texi: Document the new option to objcopy.
	* NEWS: Mention the new feature.
	* testsuite/binutils-all/note-2-32.d: New test.  Checks note
	merging on 32-bit targets.
	* testsuite/binutils-all/note-2-32.s: New test source file.
	* testsuite/binutils-all/note-2-64.d: New test.  Like note-2-32.d
	but for 64-bit targets.
	* testsuite/binutils-all/note-2-64.s: New test source file.
	* testsuite/binutils-all/objcopy.exp: Run the new test.

1 files changed, 46 insertions, 0 deletions

diff --git a/include/elf/common.h b/include/elf/common.h
index 834c859..2b9bca6 100644
--- a/include/elf/common.h
+++ b/include/elf/common.h
@@ -537,6 +537,7 @@
 
 /* #define SHF_MASKOS	0x0F000000    *//* OS-specific semantics */
 #define SHF_MASKOS	0x0FF00000	/* New value, Oct 4, 1999 Draft */
+#define SHF_GNU_BUILD_NOTE    (1 << 20)	/* Section contains GNU BUILD ATTRIBUTE notes.  */
 #define SHF_MASKPROC	0xF0000000	/* Processor-specific semantics */
 
 /* This used to be implemented as a processor specific section flag.
@@ -670,6 +671,51 @@
 #define NT_GNU_HWCAP		2	/* Used by ld.so and kernel vDSO.  */
 #define NT_GNU_BUILD_ID		3	/* Generated by ld --build-id.  */
 #define NT_GNU_GOLD_VERSION	4	/* Generated by gold.  */
+#define NT_GNU_PROPERTY_TYPE_0  5	/* Generated by gcc.  */
+
+#define NT_GNU_BUILD_ATTRIBUTE_OPEN	0x100
+#define NT_GNU_BUILD_ATTRIBUTE_FUNC	0x101
+
+#define GNU_BUILD_ATTRIBUTE_TYPE_NUMERIC	'*'
+#define GNU_BUILD_ATTRIBUTE_TYPE_STRING		'$'
+#define GNU_BUILD_ATTRIBUTE_TYPE_BOOL_TRUE	'+'
+#define GNU_BUILD_ATTRIBUTE_TYPE_BOOL_FALSE	'!'
+
+#define GNU_BUILD_ATTRIBUTE_VERSION	1
+#define GNU_BUILD_ATTRIBUTE_STACK_PROT	2
+#define GNU_BUILD_ATTRIBUTE_RELRO	3
+#define GNU_BUILD_ATTRIBUTE_STACK_SIZE	4
+#define GNU_BUILD_ATTRIBUTE_TOOL	5
+#define GNU_BUILD_ATTRIBUTE_ABI		6
+#define GNU_BUILD_ATTRIBUTE_PIC		7
+
+#define NOTE_GNU_PROPERTY_SECTION_NAME	".note.gnu.property"
+#define GNU_BUILD_ATTRS_SECTION_NAME	".gnu.build.attributes"
+
+/* Values used in GNU .note.gnu.property notes (NT_GNU_PROPERTY_TYPE_0).  */
+#define GNU_PROPERTY_STACK_SIZE			1
+#define GNU_PROPERTY_NO_COPY_ON_PROTECTED	2
+#define GNU_PROPERTY_X86_ISA_1_USED		0xc0000000
+#define GNU_PROPERTY_X86_ISA_1_NEEDED		0xc0000001
+
+#define GNU_PROPERTY_X86_ISA_1_486           (1U << 0)
+#define GNU_PROPERTY_X86_ISA_1_586           (1U << 1)
+#define GNU_PROPERTY_X86_ISA_1_686           (1U << 2)
+#define GNU_PROPERTY_X86_ISA_1_SSE           (1U << 3)
+#define GNU_PROPERTY_X86_ISA_1_SSE2          (1U << 4)
+#define GNU_PROPERTY_X86_ISA_1_SSE3          (1U << 5)
+#define GNU_PROPERTY_X86_ISA_1_SSSE3         (1U << 6)
+#define GNU_PROPERTY_X86_ISA_1_SSE4_1        (1U << 7)
+#define GNU_PROPERTY_X86_ISA_1_SSE4_2        (1U << 8)
+#define GNU_PROPERTY_X86_ISA_1_AVX           (1U << 9)
+#define GNU_PROPERTY_X86_ISA_1_AVX2          (1U << 10)
+#define GNU_PROPERTY_X86_ISA_1_AVX512F       (1U << 11)
+#define GNU_PROPERTY_X86_ISA_1_AVX512CD      (1U << 12)
+#define GNU_PROPERTY_X86_ISA_1_AVX512ER      (1U << 13)
+#define GNU_PROPERTY_X86_ISA_1_AVX512PF      (1U << 14)
+#define GNU_PROPERTY_X86_ISA_1_AVX512VL      (1U << 15)
+#define GNU_PROPERTY_X86_ISA_1_AVX512DQ      (1U << 16)
+#define GNU_PROPERTY_X86_ISA_1_AVX512BW      (1U << 17)
 
 /* Values used in GNU .note.ABI-tag notes (NT_GNU_ABI_TAG).  */
 #define GNU_ABI_TAG_LINUX	0