[fireball] 36459: - Create a VdmpInitialize function for NtVdmControl's initialize command. - Remove NtEarlyVdmInitialize hack and csrss IVT/BDA copying hack, instead, copy the first page of physical memory to the beginning of process's virtual address space like NT does.

Author: fireball
Date: Wed Sep 24 05:06:08 2008
New Revision: 36459
URL: http://svn.reactos.org/svn/reactos?rev=36459&view=rev
Log:
- Create a VdmpInitialize function for NtVdmControl's initialize command.
- Remove NtEarlyVdmInitialize hack and csrss IVT/BDA copying hack, instead, copy the first
page of physical memory to the beginning of process's virtual address space like NT
does.
Modified:
    trunk/reactos/ntoskrnl/include/internal/i386/ke.h
    trunk/reactos/ntoskrnl/include/internal/powerpc/ke.h
    trunk/reactos/ntoskrnl/ke/freeldr.c
    trunk/reactos/ntoskrnl/vdm/vdmmain.c
    trunk/reactos/subsystems/win32/csrss/video.c
Modified: trunk/reactos/ntoskrnl/include/internal/i386/ke.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/…
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/i386/ke.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/i386/ke.h [iso-8859-1] Wed Sep 24 05:06:08
2008
@@ -68,8 +68,6 @@
 ULONG KeAllocateGdtSelector(ULONG Desc[2]);
 VOID KeFreeGdtSelector(ULONG Entry);
 VOID
-NtEarlyInitVdm(VOID);
-VOID
 KeApplicationProcessorInitDispatcher(VOID);
 VOID
 KeCreateApplicationProcessorIdleThread(ULONG Id);
Modified: trunk/reactos/ntoskrnl/include/internal/powerpc/ke.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/…
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/powerpc/ke.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/powerpc/ke.h [iso-8859-1] Wed Sep 24 05:06:08
2008
@@ -54,8 +54,6 @@
 KiPPCSetProcessorFeatures(VOID);
 ULONG KeAllocateGdtSelector(ULONG Desc[2]);
 VOID KeFreeGdtSelector(ULONG Entry);
-VOID
-NtEarlyInitVdm(VOID);
 #ifdef CONFIG_SMP
 #define LOCK "isync ; "
Modified: trunk/reactos/ntoskrnl/ke/freeldr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/freeldr.c?rev=…
==============================================================================
--- trunk/reactos/ntoskrnl/ke/freeldr.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/freeldr.c [iso-8859-1] Wed Sep 24 05:06:08 2008
@@ -1332,11 +1332,6 @@
         LoaderBlock->MmapAddr = (ULONG)KeMemoryMap;
     }
-#if defined(_M_IX86)
-    /* Set up the VDM Data */
-    NtEarlyInitVdm();
-#endif
-
     /* Convert the loader block */
     KiRosFrldrLpbToNtLpb(KeRosLoaderBlock, &NtLoaderBlock);
Modified: trunk/reactos/ntoskrnl/vdm/vdmmain.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/vdm/vdmmain.c?rev…
==============================================================================
--- trunk/reactos/ntoskrnl/vdm/vdmmain.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/vdm/vdmmain.c [iso-8859-1] Wed Sep 24 05:06:08 2008
@@ -4,6 +4,7 @@
  * FILE:            ntoskrnl/vdm/vdmmain.c
  * PURPOSE:         VDM Support Services
  * PROGRAMMERS:     Alex Ionescu (alex.ionescu(a)reactos.org)
+ *                  Aleksey Bragin (aleksey(a)reactos.org)
  */
 /* INCLUDES ******************************************************************/
@@ -14,20 +15,8 @@
 /* GLOBALS *******************************************************************/
-static UCHAR OrigIVT[1024];
-static UCHAR OrigBDA[256];
 /* PRIVATE FUNCTIONS *********************************************************/
-
-VOID
-INIT_FUNCTION
-NtEarlyInitVdm(VOID)
-{
-    PCHAR start = MmCreateHyperspaceMapping(0);
-    memcpy(OrigIVT, start, 1024);
-    memcpy(OrigBDA, start+0x400, 256);
-    MmDeleteHyperspaceMapping(start);
-}
 VOID
 NTAPI
@@ -82,6 +71,90 @@
     ZwClose(RegHandle);
 }
+NTSTATUS
+NTAPI
+VdmpInitialize(PVOID ControlData)
+{
+    OBJECT_ATTRIBUTES ObjectAttributes;
+    UNICODE_STRING PhysMemName =
RTL_CONSTANT_STRING(L"\\Device\\PhysicalMemory");
+    NTSTATUS Status;
+    HANDLE PhysMemHandle;
+    PVOID BaseAddress;
+    PVOID NullAddress = NULL;
+    LARGE_INTEGER Offset;
+    ULONG ViewSize;
+
+    /* Open the physical memory section */
+    InitializeObjectAttributes(&ObjectAttributes,
+                               &PhysMemName,
+                               0,
+                               NULL,
+                               NULL);
+    Status = ZwOpenSection(&PhysMemHandle,
+                           SECTION_ALL_ACCESS,
+                           &ObjectAttributes);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Couldn't open \\Device\\PhysicalMemory\n");
+        return Status;
+    }
+
+    /* Map the BIOS and device registers into the address space */
+    Offset.QuadPart = 0;
+    ViewSize = PAGE_SIZE;
+    BaseAddress = 0;
+    Status = ZwMapViewOfSection(PhysMemHandle,
+                                NtCurrentProcess(),
+                                &BaseAddress,
+                                0,
+                                ViewSize,
+                                &Offset,
+                                &ViewSize,
+                                ViewUnmap,
+                                0,
+                                PAGE_READWRITE);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Couldn't map physical memory (%x)\n", Status);
+        ZwClose(PhysMemHandle);
+        return Status;
+    }
+
+    /* Now, copy the first physical pagee into the first virtual page */
+    _SEH_TRY
+    {
+        RtlMoveMemory(NullAddress, BaseAddress, ViewSize);
+    }
+    _SEH_HANDLE
+    {
+        /* Get the status */
+        Status = _SEH_GetExceptionCode();
+    }
+    _SEH_END;
+
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Couldn't copy first page (%x)\n", Status);
+        ZwClose(PhysMemHandle);
+        ZwUnmapViewOfSection(NtCurrentProcess(), BaseAddress);
+        return Status;
+    }
+
+    /* Close physical memory section handle */
+    ZwClose(PhysMemHandle);
+
+    /* Unmap the section */
+    Status = ZwUnmapViewOfSection(NtCurrentProcess(), BaseAddress);
+
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Couldn't unmap the section (%x)\n", Status);
+        return Status;
+    }
+
+    return STATUS_SUCCESS;
+}
+
 /* PUBLIC FUNCTIONS **********************************************************/
 /*
@@ -107,10 +180,8 @@
         case VdmInitialize:
-            /* Pretty much a hack, since a lot more needs to happen */
-            memcpy(ControlData, OrigIVT, 1024);
-            memcpy((PVOID)((ULONG_PTR)ControlData + 1024), OrigBDA, 256);
-            Status = STATUS_SUCCESS;
+            /* Call the init sub-function */
+            Status = VdmpInitialize(ControlData);
             break;
         default:
Modified: trunk/reactos/subsystems/win32/csrss/video.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/csrss/vid…
==============================================================================
--- trunk/reactos/subsystems/win32/csrss/video.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/csrss/video.c [iso-8859-1] Wed Sep 24 05:06:08 2008
@@ -23,7 +23,6 @@
     NTSTATUS Status;
     HANDLE PhysMemHandle;
     PVOID BaseAddress;
-    PVOID NullAddress;
     LARGE_INTEGER Offset;
     ULONG ViewSize;
     CHAR IVTAndBda[1024+256];
@@ -105,11 +104,6 @@
         return 0;
     }
-    /* Copy the IVT and BDA into the right place */
-    NullAddress = (PVOID)0x0; /* Workaround for GCC 3.4 */
-    memcpy(NullAddress, IVTAndBda, 1024);
-    memcpy((PVOID)0x400, &IVTAndBda[1024], 256);
-
     /* Return success */
     return 1;
 }