[Wine-patches] [eterhack 2/3] ntoskrnl.exe: Improve initialization of MDL.

[Alexander Morozov]

----------- следующая часть -----------
From a225ad696d7184bc60e5d2380c0d4bad9d24d763 Mon Sep 17 00:00:00 2001
From: Alexander Morozov <amorozov на etersoft.ru>
Date: Fri, 29 May 2009 17:32:12 +0400
Subject: [eterhack 2/3] ntoskrnl.exe: Improve initialization of MDL.

---
 dlls/ntoskrnl.exe/ntoskrnl.c |    6 ++++--
 include/ddk/wdm.h            |   15 +++++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index a05f419..c96ccc0 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -593,7 +593,8 @@ static NTSTATUS process_read( DEVICE_OBJECT *device, void *buff, ULONG *size )
     if (device->Flags & DO_DIRECT_IO)
     {
         mdl.Next = NULL;
-        mdl.Size = 0;
+        mdl.Size = sizeof(mdl);
+        mdl.MdlFlags = MDL_PAGES_LOCKED;
         mdl.StartVa = buff;
         mdl.MappedSystemVa = buff;
         mdl.ByteCount = *size;
@@ -1143,7 +1144,8 @@ PIRP WINAPI IoBuildDeviceIoControlRequest( ULONG IoControlCode,
         if (mdl == NULL)
             goto err;
         mdl->Next = NULL;
-        mdl->Size = 0;
+        mdl->Size = sizeof(mdl);
+        mdl->MdlFlags = MDL_PAGES_LOCKED;
         mdl->StartVa = OutputBuffer;
         mdl->MappedSystemVa = OutputBuffer;
         mdl->ByteCount = OutputBufferLength;
diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index 1e01dc3..9b55ac8 100644
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -951,6 +951,21 @@ typedef struct _MDL {
   ULONG  ByteOffset;
 } MDL, *PMDL;
 
+#define MDL_MAPPED_TO_SYSTEM_VA     0x0001
+#define MDL_PAGES_LOCKED            0x0002
+#define MDL_SOURCE_IS_NONPAGED_POOL 0x0004
+#define MDL_ALLOCATED_FIXED_SIZE    0x0008
+#define MDL_PARTIAL                 0x0010
+#define MDL_PARTIAL_HAS_BEEN_MAPPED 0x0020
+#define MDL_IO_PAGE_READ            0x0040
+#define MDL_WRITE_OPERATION         0x0080
+#define MDL_PARENT_MAPPED_SYSTEM_VA 0x0100
+#define MDL_FREE_EXTRA_PTES         0x0200
+#define MDL_IO_SPACE                0x0800
+#define MDL_NETWORK_HEADER          0x1000
+#define MDL_MAPPING_CAN_FAIL        0x2000
+#define MDL_ALLOCATED_MUST_SUCCEED  0x4000
+
 typedef struct _KTIMER {
     DISPATCHER_HEADER Header;
     ULARGE_INTEGER DueTime;
-- 
1.6.3.1