| 1 | ;; @file
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| 2 | ;
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| 3 | ; TRPM - Host Context Ring-0
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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 | ;* Header Files *
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| 21 | ;*******************************************************************************
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| 22 | %include "VBox/nasm.mac"
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| 23 |
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| 24 |
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| 25 | BEGINCODE
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| 26 |
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| 27 | align 16
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| 28 | ;;
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| 29 | ; This is the alternative return from VMMR0Entry() used when
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| 30 | ; we need to dispatch an interrupt to the Host (we received it in GC).
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| 31 | ;
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| 32 | ; As seen in TRPMR0SetupInterruptDispatcherFrame() the stack is different
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| 33 | ; than for the normal VMMR0Entry() return.
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| 34 | ;
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| 35 | ; 32-bit:
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| 36 | ; 18 iret frame
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| 37 | ; 14 retf selector (interrupt handler)
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| 38 | ; 10 retf offset (interrupt handler)
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| 39 | ; c es
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| 40 | ; 8 fs
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| 41 | ; 4 ds
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| 42 | ; 0 pVM (esp here)
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| 43 | ;
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| 44 | ; 64-bit:
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| 45 | ; 24 iret frame
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| 46 | ; 18 retf selector (interrupt handler)
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| 47 | ; 10 retf offset (interrupt handler)
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| 48 | ; 8 uOperation
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| 49 | ; 0 pVM
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| 50 | ;
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| 51 | BEGINPROC trpmR0InterruptDispatcher
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| 52 | %ifdef __AMD64__
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| 53 | lea rsp, [rsp + 10h] ; skip pVM and uOperation
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| 54 | db 48h
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| 55 | retf
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| 56 | %else ; !__AMD64__
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| 57 | add esp, byte 4 ; skip pVM
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| 58 | pop ds
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| 59 | pop fs
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| 60 | pop es
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| 61 | retf
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| 62 | %endif ; !__AMD64__
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| 63 | ENDPROC trpmR0InterruptDispatcher
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| 64 |
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