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1 | # TITLE CpuAsm.S: \r |
| 2 | \r |
| 3 | #------------------------------------------------------------------------------\r |
| 4 | #*\r |
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5 | #* Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.<BR>\r |
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6 | #* This program and the accompanying materials\r |
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7 | #* are licensed and made available under the terms and conditions of the BSD License\r |
| 8 | #* which accompanies this distribution. The full text of the license may be found at\r |
| 9 | #* http://opensource.org/licenses/bsd-license.php\r |
| 10 | #*\r |
| 11 | #* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 12 | #* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 13 | #*\r |
| 14 | #* CpuAsm.S\r |
| 15 | #*\r |
| 16 | #* Abstract:\r |
| 17 | #*\r |
| 18 | #------------------------------------------------------------------------------\r |
| 19 | \r |
| 20 | \r |
| 21 | #text SEGMENT\r |
| 22 | \r |
| 23 | \r |
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24 | #------------------------------------------------------------------------------\r |
| 25 | # VOID\r |
| 26 | # SetCodeSelector (\r |
| 27 | # UINT16 Selector\r |
| 28 | # );\r |
| 29 | #------------------------------------------------------------------------------\r |
| 30 | ASM_GLOBAL ASM_PFX(SetCodeSelector)\r |
| 31 | ASM_PFX(SetCodeSelector):\r |
| 32 | subq $0x10, %rsp \r |
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33 | leaq L_setCodeSelectorLongJump(%rip), %rax \r |
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34 | movq %rax, (%rsp) \r |
| 35 | movw %cx, 4(%rsp)\r |
| 36 | .byte 0xFF, 0x2C, 0x24 # jmp (%rsp) note:fword jmp\r |
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37 | L_setCodeSelectorLongJump:\r |
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38 | addq $0x10, %rsp\r |
| 39 | ret\r |
| 40 | \r |
| 41 | #------------------------------------------------------------------------------\r |
| 42 | # VOID\r |
| 43 | # SetDataSelectors (\r |
| 44 | # UINT16 Selector\r |
| 45 | # );\r |
| 46 | #------------------------------------------------------------------------------\r |
| 47 | ASM_GLOBAL ASM_PFX(SetDataSelectors)\r |
| 48 | ASM_PFX(SetDataSelectors):\r |
| 49 | movw %cx, %ss\r |
| 50 | movw %cx, %ds\r |
| 51 | movw %cx, %es\r |
| 52 | movw %cx, %fs\r |
| 53 | movw %cx, %gs\r |
| 54 | ret\r |
| 55 | \r |
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56 | #text ENDS\r |
| 57 | \r |
| 58 | #END\r |
| 59 | \r |
| 60 | \r |
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