diff options
Diffstat (limited to 'ArmPkg/Library/ArmSvcLib/AArch64/ArmSvc.S')
| -rw-r--r-- | ArmPkg/Library/ArmSvcLib/AArch64/ArmSvc.S | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/ArmPkg/Library/ArmSvcLib/AArch64/ArmSvc.S b/ArmPkg/Library/ArmSvcLib/AArch64/ArmSvc.S index 7c94db3451..ee265f94b9 100644 --- a/ArmPkg/Library/ArmSvcLib/AArch64/ArmSvc.S +++ b/ArmPkg/Library/ArmSvcLib/AArch64/ArmSvc.S @@ -1,5 +1,5 @@ //
-// Copyright (c) 2012 - 2017, ARM Limited. All rights reserved.
+// Copyright (c) 2012 - 2020, ARM Limited. All rights reserved.
//
// SPDX-License-Identifier: BSD-2-Clause-Patent
//
@@ -25,6 +25,9 @@ ASM_PFX(ArmCallSvc): ldp x0, x1, [x0, #0]
svc #0
+ // Prevent speculative execution beyond svc instruction
+ dsb nsh
+ isb
// Pop the ARM_SVC_ARGS structure address from the stack into x9
ldr x9, [sp, #16]
|