projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| e1f414b6 | 1 | /** @file\r |
| 2 | Implementation of SetJump() on IA-32.\r | |
| 3 | \r | |
| 4 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r | |
| 5 | All rights reserved. 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 | **/\r | |
| 14 | \r | |
| 15 | //\r | |
| 16 | // Include common header file for this module.\r | |
| 17 | //\r | |
| f734a10a A |
18 | #include <BaseLibInternals.h>\r |
| 19 | \r | |
| 42eedea9 | 20 | /**\r |
| 21 | Worker function that checks ASSERT condition for JumpBuffer\r | |
| e1f414b6 | 22 | \r |
| 42eedea9 | 23 | Checks ASSERT condition for JumpBuffer.\r |
| 24 | \r | |
| 25 | If JumpBuffer is NULL, then ASSERT().\r | |
| 26 | For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().\r | |
| 27 | \r | |
| 28 | @param JumpBuffer A pointer to CPU context buffer.\r | |
| 29 | \r | |
| 30 | **/\r | |
| e1f414b6 | 31 | VOID\r |
| 32 | EFIAPI\r | |
| 33 | InternalAssertJumpBuffer (\r | |
| 34 | IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer\r | |
| 35 | );\r | |
| 36 | \r | |
| 42eedea9 | 37 | /**\r |
| 38 | Saves the current CPU context that can be restored with a call to LongJump()\r | |
| 39 | and returns 0.\r | |
| 40 | \r | |
| 41 | Saves the current CPU context in the buffer specified by JumpBuffer and\r | |
| 42 | returns 0. The initial call to SetJump() must always return 0. Subsequent\r | |
| 43 | calls to LongJump() cause a non-zero value to be returned by SetJump().\r | |
| 44 | \r | |
| 45 | If JumpBuffer is NULL, then ASSERT().\r | |
| 46 | For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().\r | |
| 47 | \r | |
| 48 | @param JumpBuffer A pointer to CPU context buffer.\r | |
| 49 | \r | |
| 50 | @retval 0 Indicates a return from SetJump().\r | |
| 51 | \r | |
| 52 | **/\r | |
| e1f414b6 | 53 | _declspec (naked)\r |
| 54 | UINTN\r | |
| 55 | EFIAPI\r | |
| 56 | SetJump (\r | |
| 57 | OUT BASE_LIBRARY_JUMP_BUFFER *JumpBuffer\r | |
| 58 | )\r | |
| 59 | {\r | |
| 60 | _asm {\r | |
| 61 | push [esp + 4]\r | |
| 62 | call InternalAssertJumpBuffer\r | |
| 63 | pop ecx\r | |
| 64 | pop ecx\r | |
| 65 | mov edx, [esp]\r | |
| 66 | mov [edx], ebx\r | |
| 67 | mov [edx + 4], esi\r | |
| 68 | mov [edx + 8], edi\r | |
| 69 | mov [edx + 12], ebp\r | |
| 70 | mov [edx + 16], esp\r | |
| 71 | mov [edx + 20], ecx\r | |
| 72 | xor eax, eax\r | |
| 73 | jmp ecx\r | |
| 74 | }\r | |
| 75 | }\r | |
| 76 | \r |