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[NTVDM]

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Save and restore the general purpose and segment registers around Int32Call
calls in the BIOS. Also, make sure CF doesn't get set by the called interrupt
procedure.


svn path=/trunk/; revision=69297
This commit is contained in:
Aleksandar Andrejevic 2015-09-19 22:12:56 +00:00
parent 2ea155305a
commit d9a6ce4f12
2 changed files with 40 additions and 2 deletions
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23
reactos/subsystems/mvdm/ntvdm/bios/bios32/bios32.c
View file

@ -721,7 +721,30 @@ static VOID WINAPI BiosTimerIrq(LPWORD Stack)
* because some programs may hook only BIOS_SYS_TIMER_INTERRUPT * because some programs may hook only BIOS_SYS_TIMER_INTERRUPT
* for their purpose... * for their purpose...
*/ */
WORD AX = getAX();
WORD CX = getCX();
WORD DX = getDX();
WORD BX = getBX();
WORD BP = getBP();
WORD SI = getSI();
WORD DI = getDI();
WORD DS = getDS();
WORD ES = getES();
Int32Call(&BiosContext, BIOS_SYS_TIMER_INTERRUPT); Int32Call(&BiosContext, BIOS_SYS_TIMER_INTERRUPT);
setAX(AX);
setCX(CX);
setDX(DX);
setBX(BX);
setBP(BP);
setSI(SI);
setDI(DI);
setDS(DS);
setES(ES);
setCF(0);
// BiosSystemTimerInterrupt(Stack); // BiosSystemTimerInterrupt(Stack);
PicIRQComplete(LOBYTE(Stack[STACK_INT_NUM])); PicIRQComplete(LOBYTE(Stack[STACK_INT_NUM]));
} }

19
reactos/subsystems/mvdm/ntvdm/bios/bios32/kbdbios32.c
View file

@ -209,8 +209,15 @@ VOID WINAPI BiosKeyboardIrq(LPWORD Stack)
* In return, if CF is set we continue processing the scan code * In return, if CF is set we continue processing the scan code
* stored in AL, and if not, we skip it. * stored in AL, and if not, we skip it.
*/ */
BYTE CF = getCF();
WORD AX = getAX(); WORD AX = getAX();
WORD CX = getCX();
WORD DX = getDX();
WORD BX = getBX();
WORD BP = getBP();
WORD SI = getSI();
WORD DI = getDI();
WORD DS = getDS();
WORD ES = getES();
setCF(1); setCF(1);
setAL(IOReadB(PS2_DATA_PORT)); setAL(IOReadB(PS2_DATA_PORT));
@ -222,7 +229,15 @@ VOID WINAPI BiosKeyboardIrq(LPWORD Stack)
ScanCode = getAL(); ScanCode = getAL();
setAX(AX); setAX(AX);
setCF(CF); setCX(CX);
setDX(DX);
setBX(BX);
setBP(BP);
setSI(SI);
setDI(DI);
setDS(DS);
setES(ES);
setCF(0);
if (ScanCode == 0xE0) if (ScanCode == 0xE0)
{ {