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|
; $Id: VMMGCA.asm $
;; @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
|
