1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
4; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
5; This program and the accompanying materials
6; are licensed and made available under the terms and conditions of the BSD License
7; which accompanies this distribution.  The full text of the license may be found at
8; http://opensource.org/licenses/bsd-license.php.
9;
10; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12;
13;------------------------------------------------------------------------------
14
15  EXPORT  SetJump
16  EXPORT  InternalLongJump
17
18  AREA  BaseLib, CODE, READONLY
19
20;/**
21;  Saves the current CPU context that can be restored with a call to LongJump() and returns 0.;
22;
23;  Saves the current CPU context in the buffer specified by JumpBuffer and returns 0.  The initial
24;  call to SetJump() must always return 0.  Subsequent calls to LongJump() cause a non-zero
25;  value to be returned by SetJump().
26;
27;  If JumpBuffer is NULL, then ASSERT().
28;  For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().
29;
30;  @param  JumpBuffer    A pointer to CPU context buffer.
31;
32;**/
33;
34;UINTN
35;EFIAPI
36;SetJump (
37;  IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer  // R0
38;  )
39;
40SetJump
41  MOV  R3, R13
42  STM  R0, {R3-R12,R14}
43  EOR  R0, R0
44  BX   LR
45
46;/**
47;  Restores the CPU context that was saved with SetJump().;
48;
49;  Restores the CPU context from the buffer specified by JumpBuffer.
50;  This function never returns to the caller.
51;  Instead is resumes execution based on the state of JumpBuffer.
52;
53;  @param  JumpBuffer    A pointer to CPU context buffer.
54;  @param  Value         The value to return when the SetJump() context is restored.
55;
56;**/
57;VOID
58;EFIAPI
59;InternalLongJump (
60;  IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,  // R0
61;  IN      UINTN                     Value         // R1
62;  );
63;
64InternalLongJump
65  LDM   R0, {R3-R12,R14}
66  MOV   R13, R3
67  MOV   R0, R1
68  BX    LR
69
70  END
71