Adds the speculation barrier instructions to the ARM assembler and disassembler.

See:
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/download-the-whitepaper

opcodes	* arm-dis.c (arm_opcodes): Add ssbb and pssbb and move
	csdb together with them.
	(thumb32_opcodes): Likewise.

gas	* config/tc-arm.c (insns): Add new ssbb and pssbb instructions.
	* testsuite/gas/arm/csdb.s: Add new tests for ssbb and pssbb.
	* testsuite/gas/arm/csdb.d: Likewise
	* testsuite/gas/arm/thumb2_it_bad.s: Likewise.
	* testsuite/gas/arm/thumb2_it_bad.l: Likewise.
	* testsuite/gas/arm/barrier.d: Update with ssbb.
	* testsuite/gas/arm/barrier-thumb.d: Likewise.

8 files changed, 29 insertions, 6 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 712bec5..5127589 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,13 @@
+2018-07-11  Sudakshina Das  <sudi.das@arm.com>
+
+	* config/tc-arm.c (insns): Add new ssbb and pssbb instructions.
+	* testsuite/gas/arm/csdb.s: Add new tests for ssbb and pssbb.
+	* testsuite/gas/arm/csdb.d: Likewise
+	* testsuite/gas/arm/thumb2_it_bad.s: Likewise.
+	* testsuite/gas/arm/thumb2_it_bad.l: Likewise.
+	* testsuite/gas/arm/barrier.d: Update with ssbb.
+	* testsuite/gas/arm/barrier-thumb.d: Likewise.
+
 2018-07-11  Jan Beulich  <jbeulich@suse.com>
 
 	* config/tc-i386.c (inoutportreg, reg16_inoutportreg): Delete.
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index ef814ff..9f3988a 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -20051,6 +20051,8 @@ static const struct asm_opcode insns[] =
 #define THUMB_VARIANT  & arm_ext_v6t2
 
  TUE("csdb",	320f014, f3af8014, 0, (), noargs, t_csdb),
+ TUF("ssbb",	57ff040, f3bf8f40, 0, (), noargs, t_csdb),
+ TUF("pssbb",	57ff044, f3bf8f44, 0, (), noargs, t_csdb),
 
 #undef  ARM_VARIANT
 #define ARM_VARIANT    & arm_ext_v6t2
diff --git a/gas/testsuite/gas/arm/barrier-thumb.d b/gas/testsuite/gas/arm/barrier-thumb.d
index 9194372..fd163fc 100644
--- a/gas/testsuite/gas/arm/barrier-thumb.d
+++ b/gas/testsuite/gas/arm/barrier-thumb.d
@@ -59,7 +59,7 @@ Disassembly of section .text:
 000000b8 <[^>]*> f3bf 8f46 	dsb	(nshst|unst|#6)
 000000bc <[^>]*> f3bf 8f43 	dsb	(osh|#3)
 000000c0 <[^>]*> f3bf 8f6f 	isb	(sy|#15)
-000000c4 <[^>]*> f3bf 8f40 	dsb	#0
+000000c4 <[^>]*> f3bf 8f40 	ssbb
 000000c8 <[^>]*> f3bf 8f4f 	dsb	(sy|#15)
 000000cc <[^>]*> f3bf 8f50 	dmb	#0
 000000d0 <[^>]*> f3bf 8f5f 	dmb	(sy|#15)
diff --git a/gas/testsuite/gas/arm/barrier.d b/gas/testsuite/gas/arm/barrier.d
index a09b1ea..f747026 100644
--- a/gas/testsuite/gas/arm/barrier.d
+++ b/gas/testsuite/gas/arm/barrier.d
@@ -58,7 +58,7 @@ Disassembly of section .text:
 000000b8 <[^>]*> f57ff046 	dsb	(nshst|unst|#6)
 000000bc <[^>]*> f57ff043 	dsb	(osh|#3)
 000000c0 <[^>]*> f57ff06f 	isb	(sy|#15)
-000000c4 <[^>]*> f57ff040 	dsb	#0
+000000c4 <[^>]*> f57ff040 	ssbb
 000000c8 <[^>]*> f57ff04f 	dsb	(sy|#15)
 000000cc <[^>]*> f57ff050 	dmb	#0
 000000d0 <[^>]*> f57ff05f 	dmb	(sy|#15)
diff --git a/gas/testsuite/gas/arm/csdb.d b/gas/testsuite/gas/arm/csdb.d
index baf5855..db73907 100644
--- a/gas/testsuite/gas/arm/csdb.d
+++ b/gas/testsuite/gas/arm/csdb.d
@@ -5,6 +5,9 @@
 .*: +file format .*arm.*
 
 Disassembly of section .text:
-0+000 <[^>]*> f3af 8014 ?	csdb
-0+004 <[^>]*> e320f014 ?	csdb
-
+.*> f3af 8014 ?	csdb
+.*> f3bf 8f40 ?	ssbb
+.*> f3bf 8f44 ?	pssbb
+.*> e320f014 ?	csdb
+.*> f57ff040 ?	ssbb
+.*> f57ff044 ?	pssbb
diff --git a/gas/testsuite/gas/arm/csdb.s b/gas/testsuite/gas/arm/csdb.s
index 133a5f0..f31f5df 100644
--- a/gas/testsuite/gas/arm/csdb.s
+++ b/gas/testsuite/gas/arm/csdb.s
@@ -2,5 +2,9 @@
 .thumb
 .syntax unified
 csdb
+ssbb
+pssbb
 .arm
 csdb
+ssbb
+pssbb
diff --git a/gas/testsuite/gas/arm/thumb2_it_bad.l b/gas/testsuite/gas/arm/thumb2_it_bad.l
index da9341f..95ef273 100644
--- a/gas/testsuite/gas/arm/thumb2_it_bad.l
+++ b/gas/testsuite/gas/arm/thumb2_it_bad.l
@@ -11,3 +11,5 @@
 [^:]*:20: Error: instruction not allowed in IT block -- `setendeq le'
 [^:]*:22: Error: IT falling in the range of a previous IT block -- `iteq eq'
 [^:]*:25: Error: instruction not allowed in IT block -- `csdbeq'
+[^:]*:26: Error: instruction not allowed in IT block -- `ssbbeq'
+[^:]*:27: Error: instruction not allowed in IT block -- `pssbbeq'
diff --git a/gas/testsuite/gas/arm/thumb2_it_bad.s b/gas/testsuite/gas/arm/thumb2_it_bad.s
index 72f305d..7cdb9f1 100644
--- a/gas/testsuite/gas/arm/thumb2_it_bad.s
+++ b/gas/testsuite/gas/arm/thumb2_it_bad.s
@@ -21,6 +21,8 @@ thumb2_it_bad:
 	it	eq
 	iteq	eq
 	nop
-	it	eq
+	ittt	eq
 	csdbeq
+	ssbbeq
+	pssbbeq
 foo: