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ed1e7222 JJ |
1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
3 | ; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
9344f092 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
ed1e7222 JJ |
5 | ;\r |
6 | ; Module Name:\r | |
7 | ;\r | |
8 | ; SwitchStack.Asm\r | |
9 | ;\r | |
10 | ; Abstract:\r | |
11 | ;\r | |
12 | ;------------------------------------------------------------------------------\r | |
13 | \r | |
14 | DEFAULT REL\r | |
15 | SECTION .text\r | |
16 | \r | |
17 | ;------------------------------------------------------------------------------\r | |
18 | ; Routine Description:\r | |
19 | ;\r | |
20 | ; Routine for switching stacks with 2 parameters\r | |
21 | ;\r | |
22 | ; Arguments:\r | |
23 | ;\r | |
24 | ; (rcx) EntryPoint - Entry point with new stack.\r | |
25 | ; (rdx) Context1 - Parameter1 for entry point.\r | |
26 | ; (r8) Context2 - Parameter2 for entry point.\r | |
27 | ; (r9) NewStack - The pointer to new stack.\r | |
28 | ;\r | |
29 | ; Returns:\r | |
30 | ;\r | |
31 | ; None\r | |
32 | ;\r | |
33 | ;------------------------------------------------------------------------------\r | |
34 | global ASM_PFX(InternalSwitchStack)\r | |
35 | ASM_PFX(InternalSwitchStack):\r | |
36 | mov rax, rcx\r | |
37 | mov rcx, rdx\r | |
38 | mov rdx, r8\r | |
39 | ;\r | |
40 | ; Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,\r | |
41 | ; in case the callee wishes to spill them.\r | |
42 | ;\r | |
43 | lea rsp, [r9 - 0x20]\r | |
44 | call rax\r | |
45 | \r |