[aandrejevic] 65061: [FAST486][NTVDM] Get rid of Fast486Interrupt, since it's not used anywhere. Also we can now remove workarounds for all of the bugs that it caused. Implement the "single-instruc...
28 Oct
2014
28 Oct
'14
12:33 a.m.
Author: aandrejevic
Date: Tue Oct 28 00:33:03 2014
New Revision: 65061
URL: http://svn.reactos.org/svn/reactos?rev=65061&view=rev
Log:
[FAST486][NTVDM]
Get rid of Fast486Interrupt, since it's not used anywhere. Also we can now remove
workarounds for all of the bugs that it caused.
Implement the "single-instruction interrupt delay" for instructions that load
the
stack segment only.
Modified:
trunk/reactos/include/reactos/libs/fast486/fast486.h
trunk/reactos/lib/fast486/fast486.c
trunk/reactos/lib/fast486/opcodes.c
trunk/reactos/subsystems/ntvdm/emulator.c
trunk/reactos/subsystems/ntvdm/emulator.h
trunk/reactos/subsystems/ntvdm/ntvdm.c
Modified: trunk/reactos/include/reactos/libs/fast486/fast486.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/include/reactos/libs/fast4…
==============================================================================
--- trunk/reactos/include/reactos/libs/fast486/fast486.h [iso-8859-1] (original)
+++ trunk/reactos/include/reactos/libs/fast486/fast486.h [iso-8859-1] Tue Oct 28 00:33:03
2014
@@ -168,14 +168,6 @@
FAST486_EXCEPTION_AC = 0x11,
FAST486_EXCEPTION_MC = 0x12
} FAST486_EXCEPTIONS, *PFAST486_EXCEPTIONS;
-
-typedef enum _FAST486_INT_STATUS
-{
- FAST486_INT_NONE = 0,
- FAST486_INT_EXECUTE = 1,
- FAST486_INT_SIGNAL = 2,
- FAST486_INT_DELAYED = 3
-} FAST486_INT_STATUS, *PFAST486_INT_STATUS;
typedef
VOID
@@ -495,8 +487,8 @@
ULONG PrefixFlags;
FAST486_SEG_REGS SegmentOverride;
BOOLEAN Halted;
- FAST486_INT_STATUS IntStatus;
- UCHAR PendingIntNum;
+ BOOLEAN IntSignaled;
+ BOOLEAN DoNotInterrupt;
PULONG Tlb;
#ifndef FAST486_NO_PREFETCH
BOOLEAN PrefetchValid;
@@ -550,10 +542,6 @@
VOID
NTAPI
-Fast486Interrupt(PFAST486_STATE State, UCHAR Number);
-
-VOID
-NTAPI
Fast486InterruptSignal(PFAST486_STATE State);
VOID
Modified: trunk/reactos/lib/fast486/fast486.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/fast486/fast486.c?rev=…
==============================================================================
--- trunk/reactos/lib/fast486/fast486.c [iso-8859-1] (original)
+++ trunk/reactos/lib/fast486/fast486.c [iso-8859-1] Tue Oct 28 00:33:03 2014
@@ -85,7 +85,12 @@
* Check if there is an interrupt to execute, or a hardware interrupt signal
* while interrupts are enabled.
*/
- if (State->Flags.Tf && !State->Halted)
+ if (State->DoNotInterrupt)
+ {
+ /* Clear the interrupt delay flag */
+ State->DoNotInterrupt = FALSE;
+ }
+ else if (State->Flags.Tf && !State->Halted)
{
/* Perform the interrupt */
Fast486PerformInterrupt(State, 0x01);
@@ -99,29 +104,16 @@
*/
State->Flags.Tf = FALSE;
}
- else if (State->IntStatus == FAST486_INT_EXECUTE)
+ else if (State->Flags.If && State->IntSignaled)
{
/* No longer halted */
State->Halted = FALSE;
- /* Perform the interrupt */
- Fast486PerformInterrupt(State, State->PendingIntNum);
+ /* Acknowledge the interrupt and perform it */
+ Fast486PerformInterrupt(State, State->IntAckCallback(State));
/* Clear the interrupt status */
- State->IntStatus = FAST486_INT_NONE;
- }
- else if (State->Flags.If && (State->IntStatus ==
FAST486_INT_SIGNAL))
- {
- /* Acknowledge the interrupt to get the number */
- State->PendingIntNum = State->IntAckCallback(State);
-
- /* Set the interrupt status to execute on the next instruction */
- State->IntStatus = FAST486_INT_EXECUTE;
- }
- else if (State->IntStatus == FAST486_INT_DELAYED)
- {
- /* Restore the old state */
- State->IntStatus = FAST486_INT_EXECUTE;
+ State->IntSignaled = FALSE;
}
}
while ((Command == FAST486_CONTINUE) ||
@@ -286,19 +278,9 @@
VOID
NTAPI
-Fast486Interrupt(PFAST486_STATE State, UCHAR Number)
-{
- /* Set the interrupt status and the number */
- State->IntStatus = FAST486_INT_EXECUTE;
- State->PendingIntNum = Number;
-}
-
-VOID
-NTAPI
Fast486InterruptSignal(PFAST486_STATE State)
{
- /* Set the interrupt status */
- State->IntStatus = FAST486_INT_SIGNAL;
+ State->IntSignaled = TRUE;
}
VOID
Modified: trunk/reactos/lib/fast486/opcodes.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/fast486/opcodes.c?rev=…
==============================================================================
--- trunk/reactos/lib/fast486/opcodes.c [iso-8859-1] (original)
+++ trunk/reactos/lib/fast486/opcodes.c [iso-8859-1] Tue Oct 28 00:33:03 2014
@@ -2635,7 +2635,11 @@
}
/* Call the internal API */
- Fast486LoadSegment(State, FAST486_REG_SS, LOWORD(NewSelector));
+ if (Fast486LoadSegment(State, FAST486_REG_SS, LOWORD(NewSelector)))
+ {
+ /* Inhibit all interrupts until the next instruction */
+ State->DoNotInterrupt = TRUE;
+ }
}
FAST486_OPCODE_HANDLER(Fast486OpcodeSbbByteModrm)
@@ -3953,7 +3957,11 @@
return;
}
- Fast486LoadSegment(State, ModRegRm.Register, LOWORD(Selector));
+ if (!Fast486LoadSegment(State, ModRegRm.Register, LOWORD(Selector)))
+ {
+ /* Exception occurred */
+ return;
+ }
}
else
{
@@ -3965,7 +3973,17 @@
return;
}
- Fast486LoadSegment(State, ModRegRm.Register, Selector);
+ if (Fast486LoadSegment(State, ModRegRm.Register, Selector))
+ {
+ /* Exception occurred */
+ return;
+ }
+ }
+
+ if ((INT)ModRegRm.Register == FAST486_REG_SS)
+ {
+ /* Inhibit all interrupts until the next instruction */
+ State->DoNotInterrupt = TRUE;
}
}
@@ -4261,10 +4279,7 @@
* changes the CS:IP, the interrupt handler won't execute and the
* stack pointer will never be restored.
*/
- if (State->IntStatus == FAST486_INT_EXECUTE)
- {
- State->IntStatus = FAST486_INT_DELAYED;
- }
+ State->DoNotInterrupt = TRUE;
return;
}
Modified: trunk/reactos/subsystems/ntvdm/emulator.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/emulator.…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/emulator.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/emulator.c [iso-8859-1] Tue Oct 28 00:33:03 2014
@@ -248,12 +248,6 @@
/* Stop the VDM */
CpuUnsimulate(); // Halt the CPU
VdmRunning = FALSE;
-}
-
-VOID EmulatorInterrupt(BYTE Number)
-{
- /* Call the Fast486 API */
- Fast486Interrupt(&EmulatorContext, Number);
}
VOID EmulatorInterruptSignal(VOID)
Modified: trunk/reactos/subsystems/ntvdm/emulator.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/emulator.…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/emulator.h [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/emulator.h [iso-8859-1] Tue Oct 28 00:33:03 2014
@@ -96,7 +96,6 @@
VOID EmulatorTerminate(VOID);
-VOID EmulatorInterrupt(BYTE Number);
VOID EmulatorInterruptSignal(VOID);
VOID EmulatorSetA20(BOOLEAN Enabled);
Modified: trunk/reactos/subsystems/ntvdm/ntvdm.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/ntvdm.c?r…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/ntvdm.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/ntvdm.c [iso-8859-1] Tue Oct 28 00:33:03 2014
@@ -204,9 +204,9 @@
case CTRL_C_EVENT:
case CTRL_BREAK_EVENT:
{
- /* Call INT 23h */
- DPRINT1("Ctrl-C/Break: Call INT 23h\n");
- EmulatorInterrupt(0x23);
+ /* HACK: Stop the VDM */
+ EmulatorTerminate();
+
break;
}
case CTRL_LAST_CLOSE_EVENT:
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