[aandrejevic] 67611: [NTVDM] - Implement XMS function 0x0E (Get Handle Information). - Fix INT 15h, AX = E820h - setCF can't be used inside an int32 callback for changing the return carry flag, bec...

Author: aandrejevic
Date: Sun May 10 00:55:38 2015
New Revision: 67611

URL: http://svn.reactos.org/svn/reactos?rev=67611&view=rev
Log:
[NTVDM]
- Implement XMS function 0x0E (Get Handle Information).
- Fix INT 15h, AX = E820h - setCF can't be used inside an int32 callback for changing
the return carry flag, because it has a different meaning there (it means that the BOP
should be repeated). Instead, we must modify the CF that was pushed on the stack.

Modified:
    trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/bios32.c
    trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c

Modified: trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/bios32.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/bios/...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/bios32.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/bios32.c	[iso-8859-1] Sun May 10 00:55:38 2015
@@ -318,7 +318,7 @@
                 PBIOS_MEMORY_MAP Map = (PBIOS_MEMORY_MAP)SEG_OFF_TO_PTR(getES(), getDI());

/* Assume the buffer won't be large enough */
-                setCF(0);
+                Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;

while (BytesWritten < getECX() && (ULONG_PTR)Map < (MAX_ADDRESS - sizeof(BIOS_MEMORY_MAP)))
                 {
@@ -326,7 +326,7 @@
                     if (!MemQueryMemoryZone(Offset, &Length, &Hooked))
                     {
                         /* No more memory blocks */
-                        setCF(1);
+                        Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
                         break;
                     }

Modified: trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/dos/d...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c	[iso-8859-1] Sun May 10 00:55:38 2015
@@ -513,6 +513,35 @@
             break;
         }

+        /* Get Handle Information */
+        case 0x0E:
+        {
+            PXMS_HANDLE Entry = GetHandleRecord(getDX());
+
+            if (Entry)
+            {
+                INT i;
+                UCHAR Handles = 0;
+
+                for (i = 0; i < XMS_MAX_HANDLES; i++)
+                {
+                    if (HandleTable[i].Handle == 0) Handles++;
+                }
+
+                setAX(1);
+                setBH(Entry->LockCount);
+                setBL(Handles);
+                setDX(Entry->Size);
+            }
+            else
+            {
+                setAX(0);
+                setBL(XMS_STATUS_INVALID_HANDLE);
+            }
+
+            break;
+        }
+
         default:
         {
             DPRINT1("XMS command AH = 0x%02X NOT IMPLEMENTED\n", getAH());