projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 |