Binutils with MCST patches
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H.J. Lu 0a59decbb8 elf: Add PT_GNU_PROPERTY segment type
Linkers group input note sections with the same name into one output
note section with the same name.  One output note section is placed in
one PT_NOTE segment.  New linkers merge all input .note.gnu.property
sections into one output .note.gnu.property section with a single
NT_GNU_PROPERTY_TYPE_0 note in a single PT_NOTE segment.  Since older
linkers treat input .note.gnu.property section as a generic note section
and just concatenate all input .note.gnu.property sections into one
output .note.gnu.property section without merging them, we may
see one or more NT_GNU_PROPERTY_TYPE_0 notes in PT_NOTE segment, which
are invalid.

GNU_PROPERTY_X86_UINT32_VALID was defined to address this issue such
that linker sets the bit for non-relocatable outputs.  But it isn't
sufficient:

1. It doesn't cover generic properties.
2. When -mx86-used-note=yes is passed to x86 assembler, the
GNU_PROPERTY_X86_UINT32_VALID bit is set in GNU_PROPERTY_X86_ISA_1_USED
property in object file and older linkers generate invalid
NT_GNU_PROPERTY_TYPE_0 notes with the GNU_PROPERTY_X86_UINT32_VALID bit
set.

I am proposing the following changes:

1. Add PT_GNU_PROPERTY segment type:

 # define PT_GNU_PROPERTY (PT_LOOS + 0x474e553)

which covers .note.gnu.property section.
2. Remove GNU_PROPERTY_X86_UINT32_VALID.

bfd/

	PR ld/23900
	* elf.c (get_program_header_size): Add a PT_GNU_PROPERTY
	segment for NOTE_GNU_PROPERTY_SECTION_NAME.
	(_bfd_elf_map_sections_to_segments): Create a PT_GNU_PROPERTY
	segment for NOTE_GNU_PROPERTY_SECTION_NAME.
	* elfxx-x86.c (_bfd_elf_link_setup_gnu_properties): Don't set
	GNU_PROPERTY_X86_UINT32_VALID.

binutils/

	PR ld/23900
	* readelf.c (get_segment_type): Support PT_GNU_PROPERTY.
	(decode_x86_isa): Don't check GNU_PROPERTY_X86_UINT32_VALID.
	(decode_x86_feature_1): Likewise.
	(decode_x86_feature_2): Likewise.
	(print_gnu_property_note): Remove GNU_PROPERTY_X86_UINT32_VALID
	check.
	* testsuite/binutils-all/i386/empty.d: Updated.
	* testsuite/binutils-all/x86-64/empty-x32.d: Likewise.
	* testsuite/binutils-all/x86-64/empty.d: Likewise.
	* testsuite/binutils-all/i386/pr21231b.s: Change
	GNU_PROPERTY_X86_ISA_1_USED bits to 0x7fffffff.
	* testsuite/binutils-all/x86-64/pr21231b.s: Likewise.

gas/

	PR ld/23900
	* config/tc-i386.c (x86_cleanup): Don't set
	GNU_PROPERTY_X86_UINT32_VALID.
	* testsuite/gas/i386/property-1.s: Change
	GNU_PROPERTY_X86_ISA_1_USED bits to 0.

include/

	PR ld/23900
	* elf/common.h (PT_GNU_PROPERTY): New.
	(GNU_PROPERTY_X86_UINT32_VALID): Removed.

ld/

	PR ld/23900
	* testsuite/ld-elf/elf.exp: Run PR ld/23900 test.
	* testsuite/ld-elf/pr23900-1-32.rd: New file.
	* testsuite/ld-elf/pr23900-1-64.rd: Likewise.
	* testsuite/ld-elf/pr23900-1.d: Likewise.
	* testsuite/ld-elf/pr23900-1.s: Likewise.
	* testsuite/ld-elf/pr23900-2.s: Likewise.
	* testsuite/ld-elf/pr23900-2a.d: Likewise.
	* testsuite/ld-elf/pr23900-2b.d: Likewise.
	* testsuite/ld-i386/ibt-plt-1.d: Adjusted.
	* testsuite/ld-i386/ibt-plt-2c.d: Likewise.
	* testsuite/ld-i386/ibt-plt-2d.d: Likewise.
	* testsuite/ld-i386/ibt-plt-3d.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-1-x32.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-1.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-2c-x32.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-2c.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-2d-x32.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-2c.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-3c-x32.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-3c.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-3d-x32.d: Likewise.
	* testsuite/ld-x86-64/ibt-plt-3d.d: Likewise.
	* testsuite/ld-i386/pr23372c.d: Expect <None>
	for GNU_PROPERTY_X86_ISA_1_USED.
	* testsuite/ld-x86-64/pr23372c-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23372c.d: Likewise.
	* testsuite/ld-x86-64/pr23372d-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23372d.d: Likewise.
	* testsuite/ld-x86-64/property-x86-5a.s: Change
	GNU_PROPERTY_X86_ISA_1_USED bits to 0.
	* testsuite/ld-x86-64/property-x86-5b.s: Likewise.
2018-12-14 04:55:34 -08:00
bfd elf: Add PT_GNU_PROPERTY segment type 2018-12-14 04:55:34 -08:00
binutils elf: Add PT_GNU_PROPERTY segment type 2018-12-14 04:55:34 -08:00
config Fix a typo in iconv.m4. 2018-11-09 16:08:10 +00:00
contrib Update dg-extract-results.* from gcc 2018-08-06 16:05:16 +02:00
cpu or1k: Add the l.muld, l.muldu, l.macu, l.msbu insns 2018-10-05 11:41:42 +09:00
elfcpp [MIPS] Add Loongson 2K1000 proccessor support. 2018-08-29 20:55:25 +08:00
etc Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
gas elf: Add PT_GNU_PROPERTY segment type 2018-12-14 04:55:34 -08:00
gdb Update the FreeBSD system call table to match FreeBSD 12.0. 2018-12-13 11:36:42 -08:00
gold [GOLD] icf_safe_so_test 2018-12-08 13:24:14 +10:30
gprof Fix typo setting user_specified variable when parsing -Z option. 2018-10-01 17:18:20 +01:00
include elf: Add PT_GNU_PROPERTY segment type 2018-12-14 04:55:34 -08:00
intl Fix a typo in iconv.m4. 2018-11-09 16:08:10 +00:00
ld elf: Add PT_GNU_PROPERTY segment type 2018-12-14 04:55:34 -08:00
libdecnumber Merge config/ changes from GCC. 2018-10-31 17:16:41 +00:00
libiberty Synchronize libiberty with gcc and add --no-recruse-limit option to tools that support name demangling. 2018-12-07 11:32:55 +00:00
opcodes RISC-V: Fix 4-arg add parsing. 2018-12-07 12:31:05 -08:00
readline Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
sim sim/cris: Fix references to cgen cpu directory 2018-12-06 12:21:11 +00:00
texinfo
zlib Merge config/ changes from GCC. 2018-10-31 17:16:41 +00:00
.cvsignore
.gitattributes
.gitignore
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ChangeLog Merge autoconf / automake update changes from GCC. 2018-10-31 17:10:56 +00:00
compile
config-ml.in Update top level configure files by synchronizing them with gcc. 2018-01-10 15:29:21 +00:00
config.guess Update config.guess and config.sub 2018-07-05 13:35:19 +02:00
config.rpath
config.sub Update config.sub 2018-07-06 08:23:40 +02:00
configure Introduce @unless/@endunless and postbootstrap Makefile targets 2018-06-29 23:49:28 -03:00
configure.ac Introduce @unless/@endunless and postbootstrap Makefile targets 2018-06-29 23:49:28 -03:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4 Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def This was already applied on the GCC side. 2018-06-19 00:05:40 +02:00
Makefile.in Introduce @unless/@endunless and postbootstrap Makefile targets 2018-06-29 23:49:28 -03:00
Makefile.tpl Introduce @unless/@endunless and postbootstrap Makefile targets 2018-06-29 23:49:28 -03:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am Merge autoconf / automake update changes from GCC. 2018-10-31 17:10:56 +00:00
README
README-maintainer-mode Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
setup.com
src-release.sh Add "contrib" to the list of GDB support dirs (on src-release.sh) 2018-09-13 12:33:19 -04:00
symlink-tree
test-driver Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ylwrap

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.