diff mbox series

[2/3] aarch64: Add FEAT_ECBHB support

Message ID 20231106140455.1694695-2-andrea.corallo@arm.com
State Committed
Headers
Series [1/3] aarch64: Add FEAT_SPECRES2 support |

Checks

Context Check Description
linaro-tcwg-bot/tcwg_binutils_check--master-aarch64 fail Patch failed to apply
linaro-tcwg-bot/tcwg_binutils_check--master-arm fail Patch failed to apply
linaro-tcwg-bot/tcwg_binutils_build--master-arm fail Patch failed to apply
linaro-tcwg-bot/tcwg_binutils_build--master-aarch64 fail Patch failed to apply

Commit Message

Andrea Corallo Nov. 6, 2023, 2:04 p.m. UTC 
  This patch add support for FEAT_ECBHB "Exploitative control using
branch history information" adding the "clrbhb" instruction.  AFAIU
the same alias was originally added as "clearbhb" before the
architecture was finalized (Mandatory v8.9-a/v9.4-a; Optional
v8.0-a+/v9.0-a+).
---
 gas/testsuite/gas/aarch64/clrbhb-1.d | 9 +++++++++
 gas/testsuite/gas/aarch64/clrbhb-1.s | 2 ++
 gas/testsuite/gas/aarch64/system.d   | 4 ++--
 opcodes/aarch64-tbl.h                | 4 ++++
 4 files changed, 17 insertions(+), 2 deletions(-)
 create mode 100644 gas/testsuite/gas/aarch64/clrbhb-1.d
 create mode 100644 gas/testsuite/gas/aarch64/clrbhb-1.s

Comments

Nick Clifton Nov. 7, 2023, 10:58 a.m. UTC | #1 
Hi Andrea,

>   gas/testsuite/gas/aarch64/clrbhb-1.d | 9 +++++++++
>   gas/testsuite/gas/aarch64/clrbhb-1.s | 2 ++
>   gas/testsuite/gas/aarch64/system.d   | 4 ++--
>   opcodes/aarch64-tbl.h                | 4 ++++

Approved - please apply.

Cheers
   Nick
diff mbox series

Patch

diff --git a/gas/testsuite/gas/aarch64/clrbhb-1.d b/gas/testsuite/gas/aarch64/clrbhb-1.d
new file mode 100644
index 00000000000..272ee23dfda
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/clrbhb-1.d
@@ -0,0 +1,9 @@ 
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0+ <.*>:
+   0:	d50322df 	clrbhb
+
diff --git a/gas/testsuite/gas/aarch64/clrbhb-1.s b/gas/testsuite/gas/aarch64/clrbhb-1.s
new file mode 100644
index 00000000000..edf88466e4c
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/clrbhb-1.s
@@ -0,0 +1,2 @@ 
+	clrbhb
+
diff --git a/gas/testsuite/gas/aarch64/system.d b/gas/testsuite/gas/aarch64/system.d
index bb1a94cb020..a1114169d55 100644
--- a/gas/testsuite/gas/aarch64/system.d
+++ b/gas/testsuite/gas/aarch64/system.d
@@ -14,7 +14,7 @@  Disassembly of section \.text:
 .*:	d503207f 	wfi
 .*:	d503209f 	sev
 .*:	d50320bf 	sevl
-.*:	d50322df 	clearbhb
+.*:	d50322df 	clrbhb
 .*:	d503201f 	nop
 .*:	d503203f 	yield
 .*:	d503205f 	wfe
@@ -37,7 +37,7 @@  Disassembly of section \.text:
 .*:	d503227f 	(hint	#0x13|gcsb	dsync)
 .*:	d503229f 	(hint	#0x14|csdb)
 .*:	d50322bf 	hint	#0x15
-.*:	d50322df 	(hint	#0x16|clearbhb)
+.*:	d50322df 	(hint	#0x16|clrbhb)
 .*:	d50322ff 	hint	#0x17
 .*:	d503231f 	(hint	#0x18|paciaz)
 .*:	d503233f 	(hint	#0x19|paciasp)
diff --git a/opcodes/aarch64-tbl.h b/opcodes/aarch64-tbl.h
index e07836cd668..b64d94ab70f 100644
--- a/opcodes/aarch64-tbl.h
+++ b/opcodes/aarch64-tbl.h
@@ -6101,6 +6101,10 @@  const struct aarch64_opcode aarch64_opcode_table[] =
   CSSC_INSN ("smin", 0x1ac06800, 0x7fe0fc00, OP3 (Rd, Rn, Rm), QL_I3SAMER, F_SF),
   CSSC_INSN ("umin", 0x1ac06c00, 0x7fe0fc00, OP3 (Rd, Rn, Rm), QL_I3SAMER, F_SF),
 
+  /* FEAT_CLRBHB part of the hint space and available without special
+     command-line flags.  */
+  CORE_INSN ("clrbhb", 0xd50322df, 0xffffffff, ic_system, 0, OP0 (), {}, F_ALIAS),
+
   {0, 0, 0, 0, 0, 0, {}, {}, 0, 0, 0, NULL},
 };