Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2025-08-01 19:33:23 +00:00
Code Issues Projects Releases Packages Wiki Activity

[NTVDM]

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

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
* 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);
setAX(AX);
setCX(CX);
setDX(DX);
setBX(BX);
setBP(BP);
setSI(SI);
setDI(DI);
setDS(DS);
setES(ES);
setCF(0);
// BiosSystemTimerInterrupt(Stack);
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
* stored in AL, and if not, we skip it.
*/
BYTE CF = getCF();
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);
setAL(IOReadB(PS2_DATA_PORT));
@ -222,7 +229,15 @@ VOID WINAPI BiosKeyboardIrq(LPWORD Stack)
ScanCode = getAL();
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)
{