diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.asm | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.asm')
| -rw-r--r-- | roms/edk2/ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.asm | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/roms/edk2/ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.asm b/roms/edk2/ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.asm new file mode 100644 index 000000000..65f64805a --- /dev/null +++ b/roms/edk2/ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.asm @@ -0,0 +1,32 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;------------------------------------------------------------------------------
+
+ 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
|