| 1 | ;; @file
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| 2 | ;
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| 3 | ; tstProg-1a assembly.
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| 4 |
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| 5 | ; Copyright (C) 2006 InnoTek Systemberatung GmbH
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| 6 | ;
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| 7 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 8 | ; available from http://www.virtualbox.org. This file is free software;
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| 9 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 10 | ; General Public License as published by the Free Software Foundation,
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| 11 | ; in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 12 | ; distribution. VirtualBox OSE is distributed in the hope that it will
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| 13 | ; be useful, but WITHOUT ANY WARRANTY of any kind.
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| 14 | ;
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| 15 | ; If you received this file as part of a commercial VirtualBox
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| 16 | ; distribution, then only the terms of your commercial VirtualBox
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| 17 | ; license agreement apply instead of the previous paragraph.
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| 18 |
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| 19 |
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| 20 | %include "VBox/nasm.mac"
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| 21 |
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| 22 | BEGINCODE
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| 23 | extern NAME(TSTCompareCtx)
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| 24 | extern NAME(TSTSaveCtx)
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| 25 |
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| 26 |
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| 27 | BEGINPROC tstProg1ForeverAsm
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| 28 | mov edx, [esp + 4] ; pCtx1
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| 29 | mov ecx, [esp + 8] ; pCtx2
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| 30 | push 0 ; counter
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| 31 |
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| 32 | ; a little marker for debugging.
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| 33 | mov eax, ds
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| 34 | mov gs, eax
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| 35 | mov fs, eax
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| 36 |
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| 37 | ;
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| 38 | ; Get initial context.
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| 39 | ; The state must be 100% correct here, which means
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| 40 | ; we assume both ctx structs are initially equal and do compare them
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| 41 | ; like we would in the loop.
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| 42 | ;
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| 43 | push ecx
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| 44 | push edx
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| 45 | call NAME(TSTCompareCtx)
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| 46 | lea esp, [esp + 8]
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| 47 | or eax, eax
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| 48 | jz ok
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| 49 | int03
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| 50 | ok:
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| 51 | ; now we actually get the first state.
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| 52 | push edx
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| 53 | call NAME(TSTSaveCtx)
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| 54 | lea esp, [esp + 4]
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| 55 |
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| 56 | ;
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| 57 | ; Forever.
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| 58 | ;
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| 59 | daloop:
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| 60 | xchg ebx, [esp]
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| 61 | lea ebx, [ebx + 1]
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| 62 | xchg ebx, [esp]
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| 63 | ; Save context.
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| 64 | push ecx
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| 65 | call NAME(TSTSaveCtx)
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| 66 | lea esp, [esp + 4]
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| 67 |
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| 68 | ; Compare with original context.
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| 69 | push ecx
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| 70 | push edx
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| 71 | call NAME(TSTCompareCtx)
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| 72 | lea esp, [esp + 8]
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| 73 | or eax, eax
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| 74 | jz daloop
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| 75 |
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| 76 | ; not equal!
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| 77 | pop edx
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| 78 | shl edx, 16
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| 79 | or eax, edx
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| 80 | pop ebx
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| 81 | ret
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| 82 | ENDPROC tstProg1ForeverAsm
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| 83 |
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| 84 |
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| 85 |
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