[BINUTILS, AARCH64, 1/8] Add support for Memory Tagging Extension for ARMv8.5-A

This patch is part of the patch series to add support for ARMv8.5-A
Memory Tagging Extensions. Memory Tagging Extension is an optional extension to
ARMv8.5-A and is enabled using the +memtag command line option.
This patch adds the new command line option and the new feature macros.

*** include/ChangeLog ***

2018-11-12  Sudakshina Das  <sudi.das@arm.com>

	* opcode/aarch64.h (AARCH64_FEATURE_MEMTAG): New.

*** opcodes/ChangeLog ***

2018-11-12  Sudakshina Das  <sudi.das@arm.com>

	* aarch64-tbl.h (aarch64_feature_memtag): New.
	(MEMTAG, MEMTAG_INSN): New.

*** gas/ChangeLog ***

2018-11-12  Sudakshina Das  <sudi.das@arm.com>

	* config/tc-aarch64.c (aarch64_features): Add "memtag"
	as a new option.
	* doc/c-aarch64.texi: Document the same.

7 files changed, 26 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index aafc95c..2986f0d 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,9 @@
+2018-11-12  Sudakshina Das  <sudi.das@arm.com>
+
+	* config/tc-aarch64.c (aarch64_features): Add "memtag"
+	as a new option.
+	* doc/c-aarch64.texi: Document the same.
+
 2018-11-09  Alan Modra  <amodra@gmail.com>
 
 	* config/tc-ppc.c (fixup_size): New function.
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 4ae27f7..b9aceb2 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -8829,6 +8829,8 @@ static const struct aarch64_option_cpu_value_table aarch64_features[] = {
 			AARCH64_ARCH_NONE},
   {"ssbs",		AARCH64_FEATURE (AARCH64_FEATURE_SSBS, 0),
 			AARCH64_ARCH_NONE},
+  {"memtag",		AARCH64_FEATURE (AARCH64_FEATURE_MEMTAG, 0),
+			AARCH64_ARCH_NONE},
   {NULL,		AARCH64_ARCH_NONE, AARCH64_ARCH_NONE},
 };
 
diff --git a/gas/doc/c-aarch64.texi b/gas/doc/c-aarch64.texi
index 4941c57..f38fdf5 100644
--- a/gas/doc/c-aarch64.texi
+++ b/gas/doc/c-aarch64.texi
@@ -189,6 +189,8 @@ automatically cause those extensions to be disabled.
  @tab Enable ARMv8.5-A random number instructions.
 @item @code{ssbs} @tab ARMv8-A @tab ARMv8.5-A or later
  @tab Enable Speculative Store Bypassing Safe state read and write.
+@item @code{memtag} @tab ARMv8.5-A @tab No
+ @tab Enable ARMv8.5-A Memory Tagging Extensions.
 @end multitable
 
 @node AArch64 Syntax
diff --git a/include/ChangeLog b/include/ChangeLog
index cd31f1c..08057ef 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,7 @@
+2018-11-12  Sudakshina Das  <sudi.das@arm.com>
+
+	* opcode/aarch64.h (AARCH64_FEATURE_MEMTAG): New.
+
 2018-11-07  Roman Bolshakov <r.bolshakov@yadro.com>
 	    Saagar Jha  <saagar@saagarjha.com>
 
diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index 8487767..813c36a 100644
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -84,6 +84,8 @@ typedef uint32_t aarch64_insn;
 #define AARCH64_FEATURE_ID_PFR2		0x400000000000ULL
 /* SSBS mechanism enabled.  */
 #define AARCH64_FEATURE_SSBS		0x800000000000ULL
+/* Memory Tagging Extension.  */
+#define AARCH64_FEATURE_MEMTAG		0x1000000000000ULL
 
 
 /* Architectures are the sum of the base and extensions.  */
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index bac6294..4fc11f7 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,8 @@
+2018-11-12  Sudakshina Das  <sudi.das@arm.com>
+
+	* aarch64-tbl.h (aarch64_feature_memtag): New.
+	(MEMTAG, MEMTAG_INSN): New.
+
 2018-11-06  Sudakshina Das  <sudi.das@arm.com>
 
 	* arm-dis.c (select_arm_features): Update bfd_mach_arm_8
diff --git a/opcodes/aarch64-tbl.h b/opcodes/aarch64-tbl.h
index b73007d..5a4eaea 100644
--- a/opcodes/aarch64-tbl.h
+++ b/opcodes/aarch64-tbl.h
@@ -2171,6 +2171,8 @@ static const aarch64_feature_set aarch64_feature_predres =
   AARCH64_FEATURE (AARCH64_FEATURE_PREDRES, 0);
 static const aarch64_feature_set aarch64_feature_bti =
   AARCH64_FEATURE (AARCH64_FEATURE_BTI, 0);
+static const aarch64_feature_set aarch64_feature_memtag =
+  AARCH64_FEATURE (AARCH64_FEATURE_V8_5 | AARCH64_FEATURE_MEMTAG, 0);
 
 
 #define CORE		&aarch64_feature_v8
@@ -2205,6 +2207,7 @@ static const aarch64_feature_set aarch64_feature_bti =
 #define SB		&aarch64_feature_sb
 #define PREDRES		&aarch64_feature_predres
 #define BTI		&aarch64_feature_bti
+#define MEMTAG		&aarch64_feature_memtag
 
 #define CORE_INSN(NAME,OPCODE,MASK,CLASS,OP,OPS,QUALS,FLAGS) \
   { NAME, OPCODE, MASK, CLASS, OP, CORE, OPS, QUALS, FLAGS, 0, 0, NULL }
@@ -2268,6 +2271,8 @@ static const aarch64_feature_set aarch64_feature_bti =
   { NAME, OPCODE, MASK, CLASS, 0, PREDRES, OPS, QUALS, FLAGS, 0, 0, NULL }
 #define BTI_INSN(NAME,OPCODE,MASK,CLASS,OPS,QUALS,FLAGS) \
   { NAME, OPCODE, MASK, CLASS, 0, BTI, OPS, QUALS, FLAGS, 0, 0, NULL }
+#define MEMTAG_INSN(NAME,OPCODE,MASK,CLASS,OPS,QUALS,FLAGS) \
+  { NAME, OPCODE, MASK, CLASS, 0, MEMTAG, OPS, QUALS, FLAGS, 0, 0, NULL }
 
 struct aarch64_opcode aarch64_opcode_table[] =
 {