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 | |
| 4 | ; This program and the accompanying materials\r | |
| 5 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
| 6 | ; which accompanies this distribution. The full text of the license may be found at\r | |
| 7 | ; http://opensource.org/licenses/bsd-license.php.\r | |
| 8 | ;\r | |
| 9 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 10 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 11 | ;\r | |
| 12 | ; Module Name:\r | |
| 13 | ;\r | |
| 14 | ; SwitchStack.Asm\r | |
| 15 | ;\r | |
| 16 | ; Abstract:\r | |
| 17 | ;\r | |
| 18 | ;------------------------------------------------------------------------------\r | |
| 19 | \r | |
| 20 | DEFAULT REL\r | |
| 21 | SECTION .text\r | |
| 22 | \r | |
| 23 | ;------------------------------------------------------------------------------\r | |
| 24 | ; Routine Description:\r | |
| 25 | ;\r | |
| 26 | ; Routine for switching stacks with 2 parameters\r | |
| 27 | ;\r | |
| 28 | ; Arguments:\r | |
| 29 | ;\r | |
| 30 | ; (rcx) EntryPoint - Entry point with new stack.\r | |
| 31 | ; (rdx) Context1 - Parameter1 for entry point.\r | |
| 32 | ; (r8) Context2 - Parameter2 for entry point.\r | |
| 33 | ; (r9) NewStack - The pointer to new stack.\r | |
| 34 | ;\r | |
| 35 | ; Returns:\r | |
| 36 | ;\r | |
| 37 | ; None\r | |
| 38 | ;\r | |
| 39 | ;------------------------------------------------------------------------------\r | |
| 40 | global ASM_PFX(InternalSwitchStack)\r | |
| 41 | ASM_PFX(InternalSwitchStack):\r | |
| 42 | mov rax, rcx\r | |
| 43 | mov rcx, rdx\r | |
| 44 | mov rdx, r8\r | |
| 45 | ;\r | |
| 46 | ; Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,\r | |
| 47 | ; in case the callee wishes to spill them.\r | |
| 48 | ;\r | |
| 49 | lea rsp, [r9 - 0x20]\r | |
| 50 | call rax\r | |
| 51 | \r |