projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 65960189 LG |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 3 | ; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
| 4 | ; Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>\r | |
| 5 | ; This program and the accompanying materials\r | |
| 6 | ; are licensed and made available under the terms and conditions of the BSD License\r | |
| 7 | ; which accompanies this distribution. The full text of the license may be found at\r | |
| 8 | ; http://opensource.org/licenses/bsd-license.php.\r | |
| 9 | ;\r | |
| 10 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 11 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 12 | ;\r | |
| 13 | ; Module Name:\r | |
| 14 | ;\r | |
| 15 | ; InternalSwitchStack.nasm\r | |
| 16 | ;\r | |
| 17 | ; Abstract:\r | |
| 18 | ;\r | |
| 19 | ; Implementation of a stack switch on IA-32.\r | |
| 20 | ;\r | |
| 21 | ;------------------------------------------------------------------------------\r | |
| 22 | \r | |
| 23 | SECTION .text\r | |
| 24 | \r | |
| 25 | ;------------------------------------------------------------------------------\r | |
| 26 | ; VOID\r | |
| 27 | ; EFIAPI\r | |
| 28 | ; InternalSwitchStack (\r | |
| 29 | ; IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r | |
| 30 | ; IN VOID *Context1, OPTIONAL\r | |
| 31 | ; IN VOID *Context2, OPTIONAL\r | |
| 32 | ; IN VOID *NewStack\r | |
| 33 | ; );\r | |
| 34 | ;------------------------------------------------------------------------------\r | |
| 35 | global ASM_PFX(InternalSwitchStack)\r | |
| 36 | ASM_PFX(InternalSwitchStack):\r | |
| 37 | push ebp\r | |
| 38 | mov ebp, esp\r | |
| 39 | \r | |
| 40 | mov esp, [ebp + 20] ; switch stack\r | |
| 41 | sub esp, 8\r | |
| 42 | mov eax, [ebp + 16]\r | |
| 43 | mov [esp + 4], eax\r | |
| 44 | mov eax, [ebp + 12]\r | |
| 45 | mov [esp], eax\r | |
| 46 | push 0 ; keeps gdb from unwinding stack\r | |
| 47 | jmp dword [ebp + 8] ; call and never return\r |