[aandrejevic] 61082: [FAST486] The 486 doesn't have AC, VIF, VIP or ID. Fix and simplify POPF. [NTVDM] Fix the count in the XMS copy function (INT 15h, AH = 87h).
23 Nov
2013
23 Nov
'13
1:34 a.m.
Author: aandrejevic
Date: Sat Nov 23 01:34:03 2013
New Revision: 61082
URL: http://svn.reactos.org/svn/reactos?rev=61082&view=rev
Log:
[FAST486]
The 486 doesn't have AC, VIF, VIP or ID.
Fix and simplify POPF.
[NTVDM]
Fix the count in the XMS copy function (INT 15h, AH = 87h).
Modified:
branches/ntvdm/include/reactos/libs/fast486/fast486.h
branches/ntvdm/lib/fast486/fast486.c
branches/ntvdm/lib/fast486/opcodes.c
branches/ntvdm/subsystems/ntvdm/bios.c
Modified: branches/ntvdm/include/reactos/libs/fast486/fast486.h
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/include/reactos/libs/fast…
==============================================================================
--- branches/ntvdm/include/reactos/libs/fast486/fast486.h [iso-8859-1] (original)
+++ branches/ntvdm/include/reactos/libs/fast486/fast486.h [iso-8859-1] Sat Nov 23 01:34:03
2013
@@ -341,12 +341,8 @@
ULONG Reserved2 : 1;
ULONG Rf : 1;
ULONG Vm : 1;
- ULONG Ac : 1;
- ULONG Vif : 1;
- ULONG Vip : 1;
- ULONG Id : 1;
-
- // ULONG Reserved : 10;
+
+ // ULONG Reserved : 14;
};
} FAST486_FLAGS_REG, *PFAST486_FLAGS_REG;
Modified: branches/ntvdm/lib/fast486/fast486.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/fast486/fast486.c?rev…
==============================================================================
--- branches/ntvdm/lib/fast486/fast486.c [iso-8859-1] (original)
+++ branches/ntvdm/lib/fast486/fast486.c [iso-8859-1] Sat Nov 23 01:34:03 2013
@@ -330,7 +330,7 @@
State->SegmentRegs[FAST486_REG_GS].Base,
State->SegmentRegs[FAST486_REG_GS].Limit,
State->SegmentRegs[FAST486_REG_GS].Dpl);
- DPRINT1("\nFlags: %08X (%s %s %s %s %s %s %s %s %s %s %s %s %s %s %s) Iopl:
%u\n",
+ DPRINT1("\nFlags: %08X (%s %s %s %s %s %s %s %s %s %s %s %s) Iopl: %u\n",
State->Flags.Long,
State->Flags.Cf ? "CF" : "cf",
State->Flags.Pf ? "PF" : "pf",
@@ -344,9 +344,6 @@
State->Flags.Nt ? "NT" : "nt",
State->Flags.Rf ? "RF" : "rf",
State->Flags.Vm ? "VM" : "vm",
- State->Flags.Ac ? "AC" : "ac",
- State->Flags.Vif ? "VIF" : "vif",
- State->Flags.Vip ? "VIP" : "vip",
State->Flags.Iopl);
DPRINT1("\nControl Registers:\n"
"CR0 = %08X\tCR2 = %08X\tCR3 = %08X\n",
Modified: branches/ntvdm/lib/fast486/opcodes.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/fast486/opcodes.c?rev…
==============================================================================
--- branches/ntvdm/lib/fast486/opcodes.c [iso-8859-1] (original)
+++ branches/ntvdm/lib/fast486/opcodes.c [iso-8859-1] Sat Nov 23 01:34:03 2013
@@ -4163,121 +4163,37 @@
{
BOOLEAN Size = State->SegmentRegs[FAST486_REG_CS].Size;
INT Cpl = Fast486GetCurrentPrivLevel(State);
- ULONG NewFlags;
+ FAST486_FLAGS_REG NewFlags;
NO_LOCK_PREFIX();
TOGGLE_OPSIZE(Size);
/* Pop the new flags */
- if (!Fast486StackPop(State, &NewFlags))
- {
- /* Exception occurred */
- return FALSE;
- }
-
- if (!State->Flags.Vm)
- {
- /* Check the current privilege level */
- if (Cpl == 0)
- {
- /* Supervisor */
-
- /* Set the flags */
- if (Size)
- {
- /* Memorize the old state of RF */
- BOOLEAN OldRf = State->Flags.Rf;
-
- State->Flags.Long = NewFlags;
-
- /* Restore VM and RF */
- State->Flags.Vm = FALSE;
- State->Flags.Rf = OldRf;
-
- /* Clear VIF and VIP */
- State->Flags.Vif = State->Flags.Vip = FALSE;
- }
- else State->Flags.LowWord = LOWORD(NewFlags);
-
- /* Restore the reserved bits */
- State->Flags.AlwaysSet = TRUE;
- State->Flags.Reserved0 = FALSE;
- State->Flags.Reserved1 = FALSE;
- }
- else
- {
- /* User */
-
- /* Memorize the old state of IF and IOPL */
- BOOLEAN OldIf = State->Flags.If;
- UINT OldIopl = State->Flags.Iopl;
-
- /* Set the flags */
- if (Size)
- {
- /* Memorize the old state of RF */
- BOOLEAN OldRf = State->Flags.Rf;
-
- State->Flags.Long = NewFlags;
-
- /* Restore VM and RF */
- State->Flags.Vm = FALSE;
- State->Flags.Rf = OldRf;
-
- /* Clear VIF and VIP */
- State->Flags.Vif = State->Flags.Vip = FALSE;
- }
- else State->Flags.LowWord = LOWORD(NewFlags);
-
- /* Restore the reserved bits and IOPL */
- State->Flags.AlwaysSet = TRUE;
- State->Flags.Reserved0 = FALSE;
- State->Flags.Reserved1 = FALSE;
- State->Flags.Iopl = OldIopl;
-
- /* Check if the user doesn't have the privilege to change IF */
- if (Cpl > State->Flags.Iopl)
- {
- /* Restore IF */
- State->Flags.If = OldIf;
- }
- }
- }
- else
- {
- /* Check the IOPL */
- if (State->Flags.Iopl == 3)
- {
- if (Size)
- {
- /* Memorize the old state of RF, VIF and VIP */
- BOOLEAN OldRf = State->Flags.Rf;
- BOOLEAN OldVif = State->Flags.Vif;
- BOOLEAN OldVip = State->Flags.Vip;
-
- State->Flags.Long = NewFlags;
-
- /* Restore VM, RF, VIF and VIP */
- State->Flags.Vm = TRUE;
- State->Flags.Rf = OldRf;
- State->Flags.Vif = OldVif;
- State->Flags.Vip = OldVip;
- }
- else State->Flags.LowWord = LOWORD(NewFlags);
-
- /* Restore the reserved bits and IOPL */
- State->Flags.AlwaysSet = TRUE;
- State->Flags.Reserved0 = FALSE;
- State->Flags.Reserved1 = FALSE;
- State->Flags.Iopl = 3;
- }
- else
- {
- /* Call the VM86 monitor */
- Fast486ExceptionWithErrorCode(State, FAST486_EXCEPTION_GP, 0);
- }
-
- }
+ if (!Fast486StackPop(State, &NewFlags.Long))
+ {
+ /* Exception occurred */
+ return FALSE;
+ }
+
+ if (State->Flags.Vm && (State->Flags.Iopl != 3))
+ {
+ /* Call the VM86 monitor */
+ Fast486ExceptionWithErrorCode(State, FAST486_EXCEPTION_GP, 0);
+ return TRUE;
+ }
+
+ State->Flags.Cf = NewFlags.Cf;
+ State->Flags.Pf = NewFlags.Pf;
+ State->Flags.Af = NewFlags.Af;
+ State->Flags.Zf = NewFlags.Zf;
+ State->Flags.Sf = NewFlags.Sf;
+ State->Flags.Tf = NewFlags.Tf;
+ State->Flags.Df = NewFlags.Df;
+ State->Flags.Of = NewFlags.Of;
+ State->Flags.Nt = NewFlags.Nt;
+
+ if (Cpl == 0) State->Flags.Iopl = NewFlags.Iopl;
+ if (Cpl <= State->Flags.Iopl) State->Flags.If = NewFlags.If;
return TRUE;
}
Modified: branches/ntvdm/subsystems/ntvdm/bios.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/bios.c?r…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/bios.c [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/bios.c [iso-8859-1] Sat Nov 23 01:34:03 2013
@@ -1226,7 +1226,7 @@
/* Copy Extended Memory */
case 0x87:
{
- WORD Count = getCX() * 2 - 1;
+ DWORD Count = (DWORD)getCX() * 2;
PFAST486_GDT_ENTRY Gdt = (PFAST486_GDT_ENTRY)SEG_OFF_TO_PTR(getES(),
getSI());
DWORD SourceBase = Gdt[2].Base + (Gdt[2].BaseMid << 16) +
(Gdt[2].BaseHigh << 24);
DWORD SourceLimit = Gdt[2].Limit + (Gdt[2].LimitHigh << 16);
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