ld: Support ELF GNU program properties

From .note.gnu.property section in each ELF input, we build a list of
GNU properties if .note.gnu.property section isn't corrupt.  The unknown
properties are ignored.  All property lists in relocatable inputs are
merged into an output property list.  When -z stack-size=N is used and
N isn't 0, the GNU_PROPERTY_STACK_SIZE property will be merged with or
added to the output property list.  .note.gnu.property section is
generated in output from the output property list.

bfd/

	* Makefile.am (BFD32_BACKENDS): Add elf-properties.lo.
	(BFD32_BACKENDS_CFILES): Add elf-properties.c.
	* configure.ac (elf): Add elf-properties.lo.
	* Makefile.in: Regenerated.
	* configure: Likewise.
	* elf-bfd.h (elf_property_kind): New.
	(elf_property): Likewise.
	(elf_property_list): Likewise.
	(elf_properties): Likewise.
	(_bfd_elf_parse_gnu_properties): Likewise.
	(_bfd_elf_get_property): Likewise.
	(_bfd_elf_link_setup_gnu_properties): Likewise.
	(elf_backend_data): Add parse_gnu_properties, merge_gnu_properties
	and setup_gnu_properties.
	(elf_obj_tdata): Add properties.
	* elf-properties.c: New file.
	* elf32-i386.c (elf_i386_parse_gnu_properties): New.
	(elf_i386_merge_gnu_properties): Likewise.
	(elf_backend_parse_gnu_properties): Likewise.
	(elf_backend_merge_gnu_properties): Likewise.
	* elf64-x86-64.c (elf_x86_64_parse_gnu_properties): Likewise.
	(elf_x86_64_merge_gnu_properties): Likewise.
	(elf_backend_parse_gnu_properties): Likewise.
	(elf_backend_merge_gnu_properties): Likewise.
	* elfxx-target.h (elf_backend_merge_gnu_properties): Likewise.
	(elf_backend_parse_gnu_properties): Likewise.
	(elf_backend_setup_gnu_properties): Likewise.
	(elfNN_bed): Add elf_backend_parse_gnu_properties,
	elf_backend_merge_gnu_properties and
	elf_backend_setup_gnu_properties.

ld/

	* ld/NEWS: Mention support for ELF GNU program properties.
	* emultempl/elf32.em (gld${EMULATION_NAME}_after_open): Call
	ELF setup_gnu_properties.
	* testsuite/ld-i386/i386.exp: Run property tests for Linux/i386.
	* testsuite/ld-i386/pass.c: New file.
	* testsuite/ld-i386/property-1.r: Likewise.
	* testsuite/ld-i386/property-2.r: Likewise.
	* testsuite/ld-i386/property-3.r: Likewise.
	* testsuite/ld-i386/property-4.r: Likewise.
	* testsuite/ld-i386/property-5.r: Likewise.
	* testsuite/ld-i386/property-6.r: Likewise.
	* testsuite/ld-i386/property-6a.c: Likewise.
	* testsuite/ld-i386/property-6b.c: Likewise.
	* testsuite/ld-i386/property-6c.S: Likewise.
	* testsuite/ld-i386/property-7.r: Likewise.
	* testsuite/ld-i386/property-no-copy.S: Likewise.
	* testsuite/ld-i386/property-stack.S: Likewise.
	* testsuite/ld-i386/property-unsorted-1.S: Likewise.
	* testsuite/ld-i386/property-unsorted-2.S: Likewise.
	* testsuite/ld-i386/property-x86-1.S: Likewise.
	* testsuite/ld-i386/property-x86-2.S: Likewise.
	* testsuite/ld-x86-64/pass.c: Likewise.
	* testsuite/ld-x86-64/property-1.r: Likewise.
	* testsuite/ld-x86-64/property-2.r: Likewise.
	* testsuite/ld-x86-64/property-3.r: Likewise.
	* testsuite/ld-x86-64/property-4.r: Likewise.
	* testsuite/ld-x86-64/property-5.r: Likewise.
	* testsuite/ld-x86-64/property-6.r: Likewise.
	* testsuite/ld-x86-64/property-6a.c: Likewise.
	* testsuite/ld-x86-64/property-6b.c: Likewise.
	* testsuite/ld-x86-64/property-6c.S: Likewise.
	* testsuite/ld-x86-64/property-7.r: Likewise.
	* testsuite/ld-x86-64/property-no-copy.S: Likewise.
	* testsuite/ld-x86-64/property-stack.S: Likewise.
	* testsuite/ld-x86-64/property-unsorted-1.S: Likewise.
	* testsuite/ld-x86-64/property-unsorted-2.S: Likewise.
	* testsuite/ld-x86-64/property-x86-1.S: Likewise.
	* testsuite/ld-x86-64/property-x86-2.S: Likewise.
	* testsuite/ld-x86-64/x86-64.exp: Run property tests for
	Linux/x86-64.

1 files changed, 3 insertions, 0 deletions

diff --git a/bfd/elf.c b/bfd/elf.c
index 9418e51..d4d91b6 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -9691,6 +9691,9 @@ elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
     default:
       return TRUE;
 
+    case NT_GNU_PROPERTY_TYPE_0:
+      return _bfd_elf_parse_gnu_properties (abfd, note);
+
     case NT_GNU_BUILD_ID:
       return elfobj_grok_gnu_build_id (abfd, note);
     }