[aandrejevic] 59338: [NTVDM] Fix the VDM DOS memory manager to use the segment of the data portion of the block, rather than the MCB itself.

Author: aandrejevic
Date: Tue Jun 25 16:46:35 2013
New Revision: 59338

URL: http://svn.reactos.org/svn/reactos?rev=59338&view=rev
Log:
[NTVDM]
Fix the VDM DOS memory manager to use the segment of the data portion of the block, rather than the MCB itself.

Modified:
    branches/ntvdm/subsystems/ntvdm/dos.c
    branches/ntvdm/subsystems/ntvdm/ntvdm.h

Modified: branches/ntvdm/subsystems/ntvdm/dos.c
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/dos.c?rev...
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/dos.c	[iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/dos.c	[iso-8859-1] Tue Jun 25 16:46:35 2013
@@ -148,12 +148,13 @@
     /* Take ownership of the block */
     CurrentMcb->OwnerPsp = CurrentPsp;

-    return Result;
-}
-
-WORD DosResizeMemory(WORD Segment, WORD NewSize)
-{
-    WORD ReturnSize = 0, NextSegment;
+    /* Return the segment of the data portion of the block */
+    return Result + 1;
+}
+
+WORD DosResizeMemory(WORD BlockData, WORD NewSize)
+{
+    WORD Segment = BlockData - 1, ReturnSize = 0, NextSegment;
     PDOS_MCB Mcb = SEGMENT_TO_MCB(Segment), NextMcb;

/* Make sure this is a valid, allocated block */
@@ -222,9 +223,9 @@
     return ReturnSize;
 }

-BOOLEAN DosFreeMemory(WORD Segment)
-{
-    PDOS_MCB Mcb = SEGMENT_TO_MCB(Segment);
+BOOLEAN DosFreeMemory(WORD BlockData)
+{
+    PDOS_MCB Mcb = SEGMENT_TO_MCB(BlockData - 1);

/* Make sure the MCB is valid */
     if (Mcb->BlockType != 'M' && Mcb->BlockType != 'Z') return FALSE;

Modified: branches/ntvdm/subsystems/ntvdm/ntvdm.h
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/ntvdm.h?r...
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/ntvdm.h	[iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/ntvdm.h	[iso-8859-1] Tue Jun 25 16:46:35 2013
@@ -207,8 +207,8 @@
 VOID BiosPrintCharacter(CHAR Character, BYTE Attribute);
 BOOLEAN DosInitialize();
 WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
-BOOLEAN DosFreeMemory(WORD Segment);
-WORD DosResizeMemory(WORD Segment, WORD NewSize);
+BOOLEAN DosFreeMemory(WORD BlockData);
+WORD DosResizeMemory(WORD BlockData, WORD NewSize);
 BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
 VOID DosInt20h(WORD CodeSegment);
 VOID DosInt21h(WORD CodeSegment);