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64698eb8 | 1 | ;------------------------------------------------------------------------------ |
2 | ; | |
3 | ; Copyright (c) 2006 - 2009, Intel Corporation<BR> | |
4 | ; Portions copyright (c) 2008-2009 Apple Inc.<BR> | |
5 | ; All rights reserved. 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 | ; | |
40 | SetJump | |
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 | ; | |
64 | InternalLongJump | |
65 | LDM R0, {R3-R12,R14} | |
66 | MOV R13, R3 | |
67 | MOV R0, R1 | |
68 | BX LR | |
69 | ||
70 | END |