public PfnDatabase(DataProviderBase dataProvider, Profile profile, ulong virtualAddress) : base(profile, dataProvider, virtualAddress)
{
_is64 = (_profile.Architecture == "AMD64");
// there's no point if the system is live
if (_dataProvider.IsLive)
{
return;
}
// first let's see if it already exists
FileInfo cachedFile = new FileInfo(_dataProvider.CacheFolder + "\\pfn_database_map.gz");
if (cachedFile.Exists && !dataProvider.IsLive)
{
PfnDatabaseMap dbm = RetrievePfnMap(cachedFile);
if (dbm != null)
{
_pfnDatabaseList = dbm.PfnDatabaseRecords;
return;
}
}
int pageCount = (int)(_dataProvider.ImageLength / 0x1000);
int blockTracker = 25600; // this is how many records are on 300 pages
byte[] blockBuffer = null;
for (int i = 0; i < pageCount; i++)
{
ulong startAddress = virtualAddress + (uint)(i * 0x30); // assuming pfn records are always 48 bytes long!
if (blockTracker == 25600)
{
blockTracker = 0;
blockBuffer = _dataProvider.ReadMemoryBlock(startAddress, 300 * 0x1000);
if (blockBuffer == null)
{
break;
}
}
MMPFN entry = new MMPFN(blockBuffer, blockTracker * 48);
PfnRecord record = entry.PfnRecord;
ulong containingPage = record.U4.PteFrame;
record.PtePhysicalLocation = (containingPage << 12) | record.PteAddress & 0xfff;
record.PhysicalAddress = (ulong)(i * 0x1000);
blockTracker++;
if (record.PteAddress == 0)
{
continue;
}
_pfnDatabaseList.Add(record);
}
PfnDatabaseMap map = new PfnDatabaseMap();
map.PfnDatabaseRecords = _pfnDatabaseList;
if (!dataProvider.IsLive)
{
PersistPfnMap(map, _dataProvider.CacheFolder + "\\pfn_database_map.gz");
}
}
public MMPFN(byte[] buffer, int offset)
{
GCHandle pinnedPacket = GCHandle.Alloc(buffer, GCHandleType.Pinned);
_MMPFN pfnRecord = (_MMPFN)Marshal.PtrToStructure(Marshal.UnsafeAddrOfPinnedArrayElement(buffer, offset), typeof(_MMPFN));
_pfnRecord = new PfnRecord();
_pfnRecord.Lock = pfnRecord.Lock;
_pfnRecord.PteAddress = pfnRecord.PteAddress & 0xffffffffffff;
_pfnRecord.PteLong = pfnRecord.PteLong;
_pfnRecord.VolatilePteAddress = pfnRecord.VolatilePteAddress;
_pfnRecord.NodeBlinkLow = pfnRecord.NodeBlinkLow;
_pfnRecord.VaType = pfnRecord.VaType;
_pfnRecord.NodeFlinkLow = pfnRecord.NodeFlinkLow;
_pfnRecord.ViewCount = pfnRecord.ViewCount;
_pfnRecord.U1 = new u1(pfnRecord.u1);
_pfnRecord.U2 = new u2(pfnRecord.u2);
_pfnRecord.U3 = new u3(pfnRecord.u3);
_pfnRecord.OriginalPte = pfnRecord.OriginalPte;
_pfnRecord.U4 = new u4(pfnRecord.u4);
_pfnRecord.E1 = pfnRecord.e1;
_pfnRecord.E2 = pfnRecord.e2;
pinnedPacket.Free();
}