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Diffstat (limited to 'ArmPlatformPkg/PrePeiCore/SwitchStack.asm')
-rw-r--r-- | ArmPlatformPkg/PrePeiCore/SwitchStack.asm | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/ArmPlatformPkg/PrePeiCore/SwitchStack.asm b/ArmPlatformPkg/PrePeiCore/SwitchStack.asm new file mode 100644 index 0000000000..10da81d6ac --- /dev/null +++ b/ArmPlatformPkg/PrePeiCore/SwitchStack.asm @@ -0,0 +1,38 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution. The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+;------------------------------------------------------------------------------
+
+ EXPORT SecSwitchStack
+
+ AREA Switch_Stack, CODE, READONLY
+
+;/**
+; This allows the caller to switch the stack and return
+;
+; @param StackDelta Signed amount by which to modify the stack pointer
+;
+; @return Nothing. Goes to the Entry Point passing in the new parameters
+;
+;**/
+;VOID
+;EFIAPI
+;SecSwitchStack (
+; VOID *StackDelta
+; );
+;
+SecSwitchStack
+ MOV R1, SP
+ ADD R1, R0, R1
+ MOV SP, R1
+ BX LR
+ END
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