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Sudakshina Das 104fefeebb [PATCH, BINUTULS, AARCH64, 9/9] Add SSBS to MSR/MRS
This patch is part of the patch series to add support for ARMv8.5-A
extensions.
(https://developer.arm.com/products/architecture/cpu-architecture/a-profile/exploration-tools)
The encodings can be found in the System Register XML.

This patch adds support for the mitigation for Spectre Variant 4 by
adding the PSTATE bit SSBS which are accessible using MSR and MRS
instructions. Although this is a mandatory addition to the ARMv8.5-A,
it is permitted to be added to any version of the ARMv8 architecture.
This is enabled using the command line option of +ssbs for older
versions.

*** include/ChangeLog ***

2018-10-09  Sudakshina Das  <sudi.das@arm.com>

	* opcode/aarch64.h (AARCH64_FEATURE_SSBS): New.
	(AARCH64_ARCH_V8_5): Add AARCH64_FEATURE_SSBS by default.

*** opcodes/ChangeLog ***

2018-10-09  Sudakshina Das  <sudi.das@arm.com>

	* aarch64-opc.c (operand_general_constraint_met_p): Add
	SSBS in the check for one-bit immediate.
	(aarch64_sys_regs): New entry for SSBS.
	(aarch64_sys_reg_supported_p): New check for above.
	(aarch64_pstatefields): New entry for SSBS.
	(aarch64_pstatefield_supported_p): New check for above.

*** gas/ChangeLog ***

2018-10-09  Sudakshina Das  <sudi.das@arm.com>

	* config/tc-aarch64.c (aarch64_features): Add new "ssbs".
	* doc/c-aarch64.texi: Document the same.
	* testsuite/gas/aarch64/ssbs-illegal1.d: New test.
	* testsuite/gas/aarch64/ssbs-illegal1.l: New test.
	* testsuite/gas/aarch64/ssbs-illegal2.d: New test.
	* testsuite/gas/aarch64/ssbs-illegal2.l: New test.
	* testsuite/gas/aarch64/ssbs.s: New test.
	* testsuite/gas/aarch64/ssbs1.d: Test with +ssbs
	* testsuite/gas/aarch64/ssbs2.d: Test with armv8.5-a.
2018-10-09 15:39:29 +01:00
bfd Do not place symbols into a discarded .dynsym 2018-10-09 17:36:59 +10:30
binutils Handle R_RISCV_32_PCREL in readelf 2018-10-08 10:33:29 +02:00
config
contrib
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
gas [PATCH, BINUTULS, AARCH64, 9/9] Add SSBS to MSR/MRS 2018-10-09 15:39:29 +01:00
gdb [gdb/testsuite] Fix target_supports_scheduler_locking raciness 2018-10-09 15:33:00 +02:00
gold [MIPS] Add Loongson 2K1000 proccessor support. 2018-08-29 20:55:25 +08:00
gprof Fix typo setting user_specified variable when parsing -Z option. 2018-10-01 17:18:20 +01:00
include [PATCH, BINUTULS, AARCH64, 9/9] Add SSBS to MSR/MRS 2018-10-09 15:39:29 +01:00
intl
ld x86: Don't add GNU_PROPERTY_X86_FEATURE_2_NEEDED for -z separate-code 2018-10-08 05:14:13 -07:00
libdecnumber
libiberty
opcodes [PATCH, BINUTULS, AARCH64, 9/9] Add SSBS to MSR/MRS 2018-10-09 15:39:29 +01:00
readline
sim or1k: Add the l.muld, l.muldu, l.macu, l.msbu insns 2018-10-05 11:41:42 +09:00
texinfo
zlib
.cvsignore
.gitattributes
.gitignore
ar-lib
ChangeLog Add "contrib" to the list of GDB support dirs (on src-release.sh) 2018-09-13 12:33:19 -04:00
compile
config-ml.in
config.guess
config.rpath
config.sub
configure
configure.ac
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def
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Makefile.tpl
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missing
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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
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ylwrap

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
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