; $Id$

;; @file

; VMMGC - Raw-mode Context Virtual Machine Monitor assembly routines.

;

; Copyright (C) 2006-2007 Oracle Corporation

;

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

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

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

; General Public License (GPL) as published by the Free Software

; Foundation, in version 2 as it comes in the "COPYING" file of the

; VirtualBox OSE distribution. VirtualBox OSE is distributed in the

; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.

;

;*******************************************************************************

;* Header Files *

;*******************************************************************************

%include "VBox/asmdefs.mac"

%include "VBox/x86.mac"

;*******************************************************************************

;* Defined Constants And Macros *

;*******************************************************************************

;; save all registers before loading special values for the faulting.

%macro SaveAndLoadAll 0

pushad

push ds

push es

push fs

push gs

call NAME(vmmGCTestLoadRegs)

%endmacro

;; restore all registers after faulting.

%macro RestoreAll 0

pop gs

pop fs

pop es

pop ds

popad

%endmacro

;*******************************************************************************

;* External Symbols *

;*******************************************************************************

extern IMPNAME(g_Logger)

extern IMPNAME(g_RelLogger)

extern NAME(RTLogLogger)

BEGINCODE

;/**

; * Internal GC logger worker: Logger wrapper.

; */

;VMMRCDECL(void) vmmGCLoggerWrapper(const char *pszFormat, ...);

EXPORTEDNAME vmmGCLoggerWrapper

%ifdef __YASM__

%ifdef ASM_FORMAT_ELF

push dword IMP(g_Logger) ; YASM BUG #67! YASMCHECK!

%else

push IMP(g_Logger)

%endif

%else

push IMP(g_Logger)

%endif

call NAME(RTLogLogger)

add esp, byte 4

ret

ENDPROC vmmGCLoggerWrapper

;/**

; * Internal GC logger worker: Logger (release) wrapper.

; */

;VMMRCDECL(void) vmmGCRelLoggerWrapper(const char *pszFormat, ...);

EXPORTEDNAME vmmGCRelLoggerWrapper

%ifdef __YASM__

%ifdef ASM_FORMAT_ELF

push dword IMP(g_RelLogger) ; YASM BUG #67! YASMCHECK!

%else

push IMP(g_RelLogger)

%endif

%else

push IMP(g_RelLogger)

%endif

call NAME(RTLogLogger)

add esp, byte 4

ret

ENDPROC vmmGCRelLoggerWrapper

;;

; Enables write protection.

BEGINPROC vmmGCEnableWP

push eax

mov eax, cr0

or eax, X86_CR0_WRITE_PROTECT

mov cr0, eax

pop eax

ret

ENDPROC vmmGCEnableWP

;;

; Disables write protection.

BEGINPROC vmmGCDisableWP

push eax

mov eax, cr0

and eax, ~X86_CR0_WRITE_PROTECT

mov cr0, eax

pop eax

ret

ENDPROC vmmGCDisableWP

;;

; Load special register set expected upon faults.

; All registers are changed.

BEGINPROC vmmGCTestLoadRegs

mov eax, ss

mov ds, eax

mov es, eax

mov fs, eax

mov gs, eax

mov edi, 001234567h

mov esi, 042000042h

mov ebp, 0ffeeddcch

mov ebx, 089abcdefh

mov ecx, 0ffffaaaah

mov edx, 077778888h

mov eax, 0f0f0f0f0h

ret

ENDPROC vmmGCTestLoadRegs

;;

; A Trap 3 testcase.

GLOBALNAME vmmGCTestTrap3

SaveAndLoadAll

int 3

EXPORTEDNAME vmmGCTestTrap3_FaultEIP

RestoreAll

mov eax, 0ffffffffh

ret

ENDPROC vmmGCTestTrap3

;;

; A Trap 8 testcase.

GLOBALNAME vmmGCTestTrap8

SaveAndLoadAll

sub esp, byte 8

sidt [esp]

mov word [esp], 111 ; make any #PF double fault.

lidt [esp]

add esp, byte 8

COM_S_CHAR '!'

xor eax, eax

EXPORTEDNAME vmmGCTestTrap8_FaultEIP

mov eax, [eax]

COM_S_CHAR '2'

RestoreAll

mov eax, 0ffffffffh

ret

ENDPROC vmmGCTestTrap8

;;

; A simple Trap 0d testcase.

GLOBALNAME vmmGCTestTrap0d

SaveAndLoadAll

push ds

EXPORTEDNAME vmmGCTestTrap0d_FaultEIP

ltr [esp]

pop eax

RestoreAll

mov eax, 0ffffffffh

ret

ENDPROC vmmGCTestTrap0d

;;

; A simple Trap 0e testcase.

GLOBALNAME vmmGCTestTrap0e

SaveAndLoadAll

xor eax, eax

EXPORTEDNAME vmmGCTestTrap0e_FaultEIP

mov eax, [eax]

RestoreAll

mov eax, 0ffffffffh

ret

EXPORTEDNAME vmmGCTestTrap0e_ResumeEIP

RestoreAll

xor eax, eax

ret

ENDPROC vmmGCTestTrap0e