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.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 712bec5..5127589 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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:

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index ca69248..28db604 100644 (file)
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,9 @@
+2018-07-11  Sudakshina Das  <sudi.das@arm.com>
+
+       * arm-dis.c (arm_opcodes): Add ssbb and pssbb and move
+       csdb together with them.
+       (thumb32_opcodes): Likewise.
+
 2018-07-11  Jan Beulich  <jbeulich@suse.com>
 
        * i386-opc.tbl (monitor, monitorx): Add 64-bit template

diff --git a/opcodes/arm-dis.c b/opcodes/arm-dis.c
index 8bcec13..cb2de1b 100644 (file)
--- a/opcodes/arm-dis.c
+++ b/opcodes/arm-dis.c
@@ -1846,6 +1846,11 @@ static const struct opcode32 arm_opcodes[] =
   /* MP Extension instructions.  */
   {ARM_FEATURE_CORE_LOW (ARM_EXT_MP), 0xf410f000, 0xfc70f000, "pldw\t%a"},
 
+  /* Speculation Barriers.  */
+  {ARM_FEATURE_CORE_LOW (ARM_EXT_V3), 0xe320f014, 0xffffffff, "csdb"},
+  {ARM_FEATURE_CORE_LOW (ARM_EXT_V3), 0xf57ff040, 0xffffffff, "ssbb"},
+  {ARM_FEATURE_CORE_LOW (ARM_EXT_V3), 0xf57ff044, 0xffffffff, "pssbb"},
+
   /* V7 instructions.  */
   {ARM_FEATURE_CORE_LOW (ARM_EXT_V7), 0xf450f000, 0xfd70f000, "pli\t%P"},
   {ARM_FEATURE_CORE_LOW (ARM_EXT_V7), 0x0320f0f0, 0x0ffffff0, "dbg%c\t#%0-3d"},
@@ -1901,9 +1906,6 @@ static const struct opcode32 arm_opcodes[] =
   {ARM_FEATURE_CORE_LOW (ARM_EXT_V6K),
     0x01e00f90, 0x0ff00ff0, "strexh%c\t%12-15R, %0-3R, [%16-19R]"},
 
-  /* CSDB.  */
-  {ARM_FEATURE_CORE_LOW (ARM_EXT_V3), 0xe320f014, 0xffffffff, "csdb"},
-
   /* ARM V6K NOP hints.  */
   {ARM_FEATURE_CORE_LOW (ARM_EXT_V6K),
     0x0320f001, 0x0fffffff, "yield%c"},
@@ -2799,6 +2801,11 @@ static const struct opcode32 thumb32_opcodes[] =
   {ARM_FEATURE_COPROC (CRC_EXT_ARMV8),
     0xfad0f0a0, 0xfff0f0f0, "crc32cw\t%8-11R, %16-19R, %0-3R"},
 
+  /* Speculation Barriers.  */
+  {ARM_FEATURE_CORE_LOW (ARM_EXT_V6T2), 0xf3af8014, 0xffffffff, "csdb"},
+  {ARM_FEATURE_CORE_LOW (ARM_EXT_V6T2), 0xf3bf8f40, 0xffffffff, "ssbb"},
+  {ARM_FEATURE_CORE_LOW (ARM_EXT_V6T2), 0xf3bf8f44, 0xffffffff, "pssbb"},
+
   /* V7 instructions.  */
   {ARM_FEATURE_CORE_LOW (ARM_EXT_V7), 0xf910f000, 0xff70f000, "pli%c\t%a"},
   {ARM_FEATURE_CORE_LOW (ARM_EXT_V7), 0xf3af80f0, 0xfffffff0, "dbg%c\t#%0-3d"},
@@ -2822,9 +2829,6 @@ static const struct opcode32 thumb32_opcodes[] =
   /* Security extension instructions.  */
   {ARM_FEATURE_CORE_LOW (ARM_EXT_SEC),  0xf7f08000, 0xfff0f000, "smc%c\t%K"},
 
-  /* CSDB.  */
-  {ARM_FEATURE_CORE_LOW (ARM_EXT_V6T2), 0xf3af8014, 0xffffffff, "csdb"},
-
   /* Instructions defined in the basic V6T2 set.  */
   {ARM_FEATURE_CORE_LOW (ARM_EXT_V6T2), 0xf3af8000, 0xffffffff, "nop%c.w"},
   {ARM_FEATURE_CORE_LOW (ARM_EXT_V6T2), 0xf3af8001, 0xffffffff, "yield%c.w"},