[ros-diffs] [rharabien] 53848: [FREELDR] - Improve tracing - Fix memory corruption caused by marking pages outside of page lookup table (when table is allocated only free pages was counted but MmMarkPagesInLoo...

Author: rharabien
Date: Sun Sep 25 11:07:27 2011
New Revision: 53848

URL: http://svn.reactos.org/svn/reactos?rev=53848&view=rev
Log:
[FREELDR]
- Improve tracing
- Fix memory corruption caused by marking pages outside of page lookup table (when table is allocated only free pages was counted but MmMarkPagesInLookupTable was used for all types of memory like firmware). Fixes bugcheck in ACPI HAL which happened for me

Modified:
    trunk/reactos/boot/freeldr/freeldr/mm/meminit.c

Modified: trunk/reactos/boot/freeldr/freeldr/mm/meminit.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/mm/mem...
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/mm/meminit.c [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/mm/meminit.c [iso-8859-1] Sun Sep 25 11:07:27 2011
@@ -209,7 +209,7 @@

MmInitializeHeap(PageLookupTableAddress);

-	TRACE("Memory Manager initialized. %d pages available.\n", FreePagesInLookupTable);
+	TRACE("Memory Manager initialized. 0x%x pages available.\n", FreePagesInLookupTable);

return TRUE;
@@ -271,7 +271,7 @@
         }
     }

-    TRACE("lo/hi %lx %lxn", MmLowestPhysicalPage, MmHighestPhysicalPage);
+    TRACE("lo/hi %lx %lx\n", MmLowestPhysicalPage, MmHighestPhysicalPage);
     PageCount = MmHighestPhysicalPage - MmLowestPhysicalPage;
     TRACE("MmGetAddressablePageCountIncludingHoles() returning 0x%x\n", PageCount);
     return PageCount;
@@ -319,7 +319,6 @@
 VOID MmInitPageLookupTable(PVOID PageLookupTable, ULONG TotalPageCount)
 {
     const FREELDR_MEMORY_DESCRIPTOR* MemoryDescriptor = NULL;
-    TYPE_OF_MEMORY MemoryMapPageAllocated;
     ULONG PageLookupTableStartPage;
     ULONG PageLookupTablePageCount;

@@ -333,26 +332,30 @@
     // Parse the whole memory map
     while ((MemoryDescriptor = ArcGetMemoryDescriptor(MemoryDescriptor)) != NULL)
     {
-        TRACE("Got range: 0x%lx-0x%lx, type=%s\n",
-              MemoryDescriptor->BasePage,
-              MemoryDescriptor->BasePage + MemoryDescriptor->PageCount,
-              MmGetSystemMemoryMapTypeString(MemoryDescriptor->MemoryType));
-
-        MemoryMapPageAllocated = MemoryDescriptor->MemoryType;
-
         // Mark used pages in the lookup table
-        TRACE("Marking pages as type %d: StartPage: %d PageCount: %d\n",
-              MemoryMapPageAllocated, MemoryDescriptor->BasePage, MemoryDescriptor->PageCount);
-        MmMarkPagesInLookupTable(PageLookupTable,
-                                 MemoryDescriptor->BasePage,
-                                 MemoryDescriptor->PageCount,
-                                 MemoryMapPageAllocated);
+        
+        if (MemoryDescriptor->BasePage + MemoryDescriptor->PageCount <= TotalPageCount)
+        {
+            TRACE("Marking pages 0x%lx-0x%lx as type %s\n",
+                  MemoryDescriptor->BasePage,
+                  MemoryDescriptor->BasePage + MemoryDescriptor->PageCount,
+                  MmGetSystemMemoryMapTypeString(MemoryDescriptor->MemoryType));
+            MmMarkPagesInLookupTable(PageLookupTable,
+                                     MemoryDescriptor->BasePage,
+                                     MemoryDescriptor->PageCount,
+                                     MemoryDescriptor->MemoryType);
+        }
+        else
+            TRACE("Ignoring pages 0x%lx-0x%lx (%s)\n",
+                  MemoryDescriptor->BasePage,
+                  MemoryDescriptor->BasePage + MemoryDescriptor->PageCount,
+                  MmGetSystemMemoryMapTypeString(MemoryDescriptor->MemoryType));
     }

// Mark the pages that the lookup table occupies as reserved
     PageLookupTableStartPage = MmGetPageNumberFromAddress(PageLookupTable);
     PageLookupTablePageCount = MmGetPageNumberFromAddress((PVOID)((ULONG_PTR)PageLookupTable + ROUND_UP(TotalPageCount * sizeof(PAGE_LOOKUP_TABLE_ITEM), MM_PAGE_SIZE))) - PageLookupTableStartPage;
-    TRACE("Marking the page lookup table pages as reserved StartPage: %d PageCount: %d\n", PageLookupTableStartPage, PageLookupTablePageCount);
+    TRACE("Marking the page lookup table pages as reserved StartPage: 0x%x PageCount: 0x%x\n", PageLookupTableStartPage, PageLookupTablePageCount);
     MmMarkPagesInLookupTable(PageLookupTable, PageLookupTableStartPage, PageLookupTablePageCount, LoaderFirmwareTemporary);
 }

@@ -368,7 +371,7 @@
 #if 0
    	if ((Index <= (StartPage + 16)) || (Index >= (StartPage+PageCount-16)))
    	{
-			TRACE("Index = %d StartPage = %d PageCount = %d\n", Index, StartPage, PageCount);
+			TRACE("Index = 0x%x StartPage = 0x%x PageCount = 0x%x\n", Index, StartPage, PageCount);
    	}
 #endif
    	RealPageLookupTable[Index].PageAllocated = PageAllocated;
@@ -443,7 +446,7 @@
    }
    else
    {
-		TRACE("Alloc low memory, LastFreePageHint %d, TPC %d\n", LastFreePageHint, TotalPageCount);
+		TRACE("Alloc low memory, LastFreePageHint 0x%x, TPC 0x%x\n", LastFreePageHint, TotalPageCount);
    	/* Allocate "low" pages */
    	for (Index=1; Index < LastFreePageHint; Index++)
    	{