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/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm')
| -rw-r--r-- | roms/edk2/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm b/roms/edk2/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm new file mode 100644 index 000000000..936f722be --- /dev/null +++ b/roms/edk2/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm @@ -0,0 +1,64 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2018, 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 SetJump
+ EXPORT InternalLongJump
+
+ AREA BaseLib, CODE, READONLY
+
+;/**
+; Saves the current CPU context that can be restored with a call to LongJump() and returns 0.;
+;
+; Saves the current CPU context in the buffer specified by JumpBuffer and returns 0. The initial
+; call to SetJump() must always return 0. Subsequent calls to LongJump() cause a non-zero
+; value to be returned by SetJump().
+;
+; If JumpBuffer is NULL, then ASSERT().
+; For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().
+;
+; @param JumpBuffer A pointer to CPU context buffer.
+;
+;**/
+;
+;UINTN
+;EFIAPI
+;SetJump (
+; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer // R0
+; )
+;
+SetJump
+ MOV R3, R13
+ STM R0, {R3-R12,R14}
+ EOR R0, R0
+ BX LR
+
+;/**
+; Restores the CPU context that was saved with SetJump().;
+;
+; Restores the CPU context from the buffer specified by JumpBuffer.
+; This function never returns to the caller.
+; Instead is resumes execution based on the state of JumpBuffer.
+;
+; @param JumpBuffer A pointer to CPU context buffer.
+; @param Value The value to return when the SetJump() context is restored.
+;
+;**/
+;VOID
+;EFIAPI
+;InternalLongJump (
+; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, // R0
+; IN UINTN Value // R1
+; );
+;
+InternalLongJump
+ LDM R0, {R3-R12,R14}
+ MOV R13, R3
+ MOV R0, R1
+ BX LR
+
+ END
|