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9095d37b | 1 | #------------------------------------------------------------------------------\r |
ebd04fc2 | 2 | #\r |
9095d37b | 3 | # Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
bb817c56 | 4 | # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r |
9344f092 | 5 | # SPDX-License-Identifier: BSD-2-Clause-Patent\r |
ebd04fc2 | 6 | #\r |
7 | #------------------------------------------------------------------------------\r | |
8 | .text\r | |
9 | .p2align 2\r | |
10 | \r | |
4c8a6e06 | 11 | GCC_ASM_EXPORT(SetJump)\r |
12 | GCC_ASM_EXPORT(InternalLongJump)\r | |
ebd04fc2 | 13 | \r |
14 | #/**\r | |
15 | # Saves the current CPU context that can be restored with a call to LongJump() and returns 0.#\r | |
16 | #\r | |
17 | # Saves the current CPU context in the buffer specified by JumpBuffer and returns 0. The initial\r | |
18 | # call to SetJump() must always return 0. Subsequent calls to LongJump() cause a non-zero\r | |
19 | # value to be returned by SetJump().\r | |
20 | #\r | |
21 | # If JumpBuffer is NULL, then ASSERT().\r | |
22 | # For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().\r | |
23 | #\r | |
24 | # @param JumpBuffer A pointer to CPU context buffer.\r | |
25 | #\r | |
26 | #**/\r | |
27 | #\r | |
28 | #UINTN\r | |
29 | #EFIAPI\r | |
30 | #SetJump (\r | |
31 | # IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer // R0\r | |
32 | # );\r | |
33 | #\r | |
34 | ASM_PFX(SetJump):\r | |
35 | mov r3, r13\r | |
36 | stmia r0, {r3-r12,r14}\r | |
37 | eor r0, r0, r0\r | |
38 | bx lr\r | |
39 | \r | |
40 | #/**\r | |
41 | # Restores the CPU context that was saved with SetJump().#\r | |
42 | #\r | |
43 | # Restores the CPU context from the buffer specified by JumpBuffer.\r | |
44 | # This function never returns to the caller.\r | |
45 | # Instead is resumes execution based on the state of JumpBuffer.\r | |
46 | #\r | |
47 | # @param JumpBuffer A pointer to CPU context buffer.\r | |
48 | # @param Value The value to return when the SetJump() context is restored.\r | |
49 | #\r | |
50 | #**/\r | |
51 | #VOID\r | |
52 | #EFIAPI\r | |
53 | #InternalLongJump (\r | |
54 | # IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, // R0\r | |
55 | # IN UINTN Value // R1\r | |
56 | # );\r | |
57 | #\r | |
58 | ASM_PFX(InternalLongJump):\r | |
59 | ldmia r0, {r3-r12,r14}\r | |
60 | mov r13, r3\r | |
61 | mov r0, r1\r | |
62 | bx lr\r | |
63 | \r | |
7f22d351 | 64 | ASM_FUNCTION_REMOVE_IF_UNREFERENCED\r |