[ros-diffs] [tkreuzer] 55438: [NTOSKRNL] - Modify MiRosTakeOverPebTebRanges to only create a memory area for the shared user page and rename it to MiRosTakeOverSharedUserPage. Previously it was creating a memo...

Author: tkreuzer
Date: Sun Feb  5 18:41:37 2012
New Revision: 55438

URL: http://svn.reactos.org/svn/reactos?rev=55438&view=rev
Log:
[NTOSKRNL]
- Modify MiRosTakeOverPebTebRanges to only create a memory area for the shared user page
and rename it to MiRosTakeOverSharedUserPage. Previously it was creating a memory area for
the whole region from USER_SHARED_DATA up to MM_HIGHEST_USER_ADDRESS, which is the
majority of the x64 user mode address space and doesn't even contain the PEB/TEB.
Those are allocated below the shared user page and get their memory areas created in
MiInsertNode.
- Add amd64 versions of MmGetPageTableForProcess, MmUnmapPageTable, MmGetPageFileMapping

Modified:
    trunk/reactos/ntoskrnl/mm/ARM3/procsup.c
    trunk/reactos/ntoskrnl/mm/amd64/page.c

Modified: trunk/reactos/ntoskrnl/mm/ARM3/procsup.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/procsup.c…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/procsup.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/procsup.c [iso-8859-1] Sun Feb  5 18:41:37 2012
@@ -24,7 +24,7 @@
 
 VOID
 NTAPI
-MiRosTakeOverPebTebRanges(IN PEPROCESS Process)
+MiRosTakeOverSharedUserPage(IN PEPROCESS Process)
 {
     NTSTATUS Status;
     PMEMORY_AREA MemoryArea;
@@ -35,8 +35,7 @@
     Status = MmCreateMemoryArea(&Process->Vm,
                                 MEMORY_AREA_OWNED_BY_ARM3,
                                 &AllocatedBase,
-                                ((ULONG_PTR)MM_HIGHEST_USER_ADDRESS - 1) -
-                                (ULONG_PTR)USER_SHARED_DATA,
+                                PAGE_SIZE,
                                 PAGE_READWRITE,
                                 &MemoryArea,
                                 TRUE,
@@ -1002,7 +1001,7 @@
     KeReleaseQueuedSpinLock(LockQueuePfnLock, OldIrql);
 
     /* Lock the VAD, ARM3-owned ranges away */
-    MiRosTakeOverPebTebRanges(Process);
+    MiRosTakeOverSharedUserPage(Process);
 
     /* Check if there's a Section Object */
     if (SectionObject)
@@ -1102,7 +1101,7 @@
 MmInitializeHandBuiltProcess2(IN PEPROCESS Process)
 {
     /* Lock the VAD, ARM3-owned ranges away */
-    MiRosTakeOverPebTebRanges(Process);
+    MiRosTakeOverSharedUserPage(Process);
     return STATUS_SUCCESS;
 }
 

Modified: trunk/reactos/ntoskrnl/mm/amd64/page.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/amd64/page.c?r…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/amd64/page.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/amd64/page.c [iso-8859-1] Sun Feb  5 18:41:37 2012
@@ -336,6 +336,44 @@
     return Pte.u.Hard.Valid && Pte.u.Soft.Transition;
 }
 
+static PMMPTE
+MmGetPageTableForProcess(PEPROCESS Process, PVOID Address, BOOLEAN Create)
+{
+    __debugbreak();
+    return 0;
+}
+
+BOOLEAN MmUnmapPageTable(PMMPTE Pt)
+{
+    ASSERT(FALSE);
+    return 0;
+}
+
+static ULONG64 MmGetPageEntryForProcess(PEPROCESS Process, PVOID Address)
+{
+    MMPTE Pte, *PointerPte;
+
+    PointerPte = MmGetPageTableForProcess(Process, Address, FALSE);
+    if (PointerPte)
+    {
+        Pte = *PointerPte;
+        MmUnmapPageTable(PointerPte);
+        return Pte.u.Long;
+    }
+    return 0;
+}
+
+VOID
+NTAPI
+MmGetPageFileMapping(
+    PEPROCESS Process,
+    PVOID Address,
+    SWAPENTRY* SwapEntry)
+{
+	ULONG64 Entry = MmGetPageEntryForProcess(Process, Address);
+	*SwapEntry = Entry >> 1;
+}
+
 BOOLEAN
 NTAPI
 MmIsDirtyPage(PEPROCESS Process, PVOID Address)