9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; $Id$

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;; @file

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; TRPM - Host Context Ring-0

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;

a0a3a26a4065b9401681a8c99a11bd83e08f94ccvboxsync; Copyright (C) 2006 InnoTek Systemberatung GmbH

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; This file is part of VirtualBox Open Source Edition (OSE), as

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; available from http://www.virtualbox.org. This file is free software;

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; you can redistribute it and/or modify it under the terms of the GNU

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; General Public License as published by the Free Software Foundation,

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; in version 2 as it comes in the "COPYING" file of the VirtualBox OSE

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; distribution. VirtualBox OSE is distributed in the hope that it will

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; be useful, but WITHOUT ANY WARRANTY of any kind.

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; If you received this file as part of a commercial VirtualBox

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; distribution, then only the terms of your commercial VirtualBox

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; license agreement apply instead of the previous paragraph.

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;*******************************************************************************

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;* Header Files *

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;*******************************************************************************

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync%include "VBox/asmdefs.mac"

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync%include "VBox/x86.mac"

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncBEGINCODE

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync align 16

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;;

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; Calls the interrupt gate as if we received an interrupt while in Ring-0.

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; Returns with interrupts enabled.

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; @param uIP x86:[ebp+8] msc:rcx gcc:rdi The interrupt gate IP.

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; @param SelCS x86:[ebp+12] msc:dx gcc:si The interrupt gate CS.

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync; @param RSP msc:r8 gcc:rdx The interrupt gate RSP. ~0 if no stack switch should take place. (only AMD64)

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync;DECLASM(void) trpmR0DispatchHostInterrupt(RTR0UINTPTR uIP, RTSEL SelCS, RTR0UINTPTR RSP);

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncBEGINPROC trpmR0DispatchHostInterrupt

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push xBP

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync mov xBP, xSP

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync%ifdef __AMD64__

a0a3a26a4065b9401681a8c99a11bd83e08f94ccvboxsync mov rax, rsp

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync and rsp, 15h ; align the stack. (do it unconditionally saves some jump mess)

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync ; switch stack?

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync %ifdef ASM_CALL64_MSC

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync cmp r8, 0ffffffffffffffffh

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync je .no_stack_switch

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync mov rsp, r8

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync %else

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync cmp rdx, 0ffffffffffffffffh

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync je .no_stack_switch

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync mov rsp, rdx

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync %endif

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync.no_stack_switch:

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync ; create the iret frame

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push 0 ; SS

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push rax ; RSP

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pushfd ; RFLAGS

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync and dword [rsp], ~X86_EFL_IF

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync mov ax, cs

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push rax ; CS

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync mov rax, .return ; RIP

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push rax

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync ; create the retf frame

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync %ifdef ASM_CALL64_MSC

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync movzx rdx, dx

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push rdx

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push rcx

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync %else

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync movzx rdi, di

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push rdi

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync push rsi

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync %endif

a0a3a26a4065b9401681a8c99a11bd83e08f94ccvboxsync

a0a3a26a4065b9401681a8c99a11bd83e08f94ccvboxsync ; dispatch it!

a0a3a26a4065b9401681a8c99a11bd83e08f94ccvboxsync db 048h

9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync retf

%else ; 32-bit:

mov ecx, [ebp + 8] ; uIP

movzx edx, word [ebp + 12] ; SelCS

; create the iret frame

pushfd ; EFLAGS

and dword [esp], ~X86_EFL_IF

push cs ; CS

push .return ; EIP

; create the retf frame

push edx

push ecx

; dispatch it!

retf

%endif

.return:

leave

ret

ENDPROC trpmR0DispatchHostInterrupt

%ifndef VBOX_WITHOUT_IDT_PATCHING

align 16

;;

; This is the alternative return from VMMR0Entry() used when

; we need to dispatch an interrupt to the Host (we received it in GC).

;

; As seen in TRPMR0SetupInterruptDispatcherFrame() the stack is different

; than for the normal VMMR0Entry() return.

;

; 32-bit:

; 18 iret frame

; 14 retf selector (interrupt handler)

; 10 retf offset (interrupt handler)

; c es

; 8 fs

; 4 ds

; 0 pVM (esp here)

;

; 64-bit:

; 24 iret frame

; 18 retf selector (interrupt handler)

; 10 retf offset (interrupt handler)

; 8 uOperation

; 0 pVM

;

BEGINPROC trpmR0InterruptDispatcher

%ifdef __AMD64__

lea rsp, [rsp + 10h] ; skip pVM and uOperation

db 48h

retf

%else ; !__AMD64__

add esp, byte 4 ; skip pVM

pop ds

pop fs

pop es

retf

%endif ; !__AMD64__

ENDPROC trpmR0InterruptDispatcher

%endif ; !VBOX_WITHOUT_IDT_PATCHING