fix uninitialized variable
[reactos.git] / reactos / ntoskrnl / ex / sysinfo.c
index 9ad4389..4546b75 100644 (file)
-/*
+/* $Id$
+ *
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS kernel
- * FILE:            ntoskrnl/ke/bug.c
- * PURPOSE:         Graceful system shutdown if a bug is detected
- * PROGRAMMER:      David Welch (welch@mcmail.com)
- * UPDATE HISTORY:
- *                  Created 22/05/98
+ * FILE:            ntoskrnl/ex/sysinfo.c
+ * PURPOSE:         System information functions
+ * 
+ * PROGRAMMERS:     David Welch (welch@mcmail.com)
+ *                  Aleksey Bragin (aleksey@studiocerebral.com)
  */
 
 /* INCLUDES *****************************************************************/
 
-#include <ddk/ntddk.h>
-
+#include <ntoskrnl.h>
+#define NDEBUG
 #include <internal/debug.h>
 
+extern PEPROCESS PsIdleProcess;
+extern ULONG NtGlobalFlag; /* FIXME: it should go in a ddk/?.h */
+ULONGLONG STDCALL KeQueryInterruptTime(VOID);
+
+VOID MmPrintMemoryStatistic(VOID);
+
 /* FUNCTIONS *****************************************************************/
 
-NTSTATUS
+/*
+ * @unimplemented
+ */
+VOID
 STDCALL
-NtQuerySystemEnvironmentValue (
-       IN      PUNICODE_STRING Name,
-       OUT     PVOID           Value,
-               ULONG           Length,
-               PULONG          ReturnLength
+ExEnumHandleTable (
+       PULONG  HandleTable,
+       PVOID   Callback,
+       PVOID   Param,
+       PHANDLE Handle OPTIONAL
        )
 {
        UNIMPLEMENTED;
 }
 
-
-NTSTATUS
+/*
+ * @implemented
+ */
+VOID
 STDCALL
-NtQuerySystemInformation (
-       IN      CINT    SystemInformationClass,
-       OUT     PVOID   SystemInformation,
-       IN      ULONG   Length,
-       OUT     PULONG  ResultLength
+ExGetCurrentProcessorCpuUsage (
+       PULONG  CpuUsage
        )
 {
-       UNIMPLEMENTED;
-}
+       PKPRCB Prcb;
+       ULONG TotalTime;
+       ULONGLONG ScaledIdle;
 
+       Prcb = KeGetCurrentPrcb();
 
-NTSTATUS
+       ScaledIdle = Prcb->IdleThread->KernelTime * 100;
+       TotalTime = Prcb->KernelTime + Prcb->UserTime;
+       if (TotalTime != 0)
+               *CpuUsage = 100 - (ScaledIdle / TotalTime);
+       else
+               *CpuUsage = 0;
+}
+
+/*
+ * @implemented
+ */
+VOID
 STDCALL
-NtSetSystemEnvironmentValue (
-       IN      PUNICODE_STRING VariableName,
-       IN      PUNICODE_STRING Value
+ExGetCurrentProcessorCounts (
+       PULONG  ThreadKernelTime,
+       PULONG  TotalCpuTime,
+       PULONG  ProcessorNumber
        )
 {
-       UNIMPLEMENTED;
+       PKPRCB Prcb;
+
+       Prcb = KeGetCurrentPrcb();
+
+       *ThreadKernelTime = Prcb->KernelTime + Prcb->UserTime;
+       *TotalCpuTime = Prcb->CurrentThread->KernelTime;
+       *ProcessorNumber = KeGetCurrentKPCR()->ProcessorNumber;
+}
+
+/*
+ * @implemented
+ */
+BOOLEAN 
+STDCALL
+ExIsProcessorFeaturePresent(IN ULONG ProcessorFeature)
+{
+    /* Quick check to see if it exists at all */
+    if (ProcessorFeature >= PROCESSOR_FEATURE_MAX) return(FALSE);
+
+    /* Return our support for it */
+    return(SharedUserData->ProcessorFeatures[ProcessorFeature]);
+}
+
+NTSTATUS STDCALL
+NtQuerySystemEnvironmentValue (IN      PUNICODE_STRING VariableName,
+                              OUT      PWCHAR          ValueBuffer,
+                              IN       ULONG           ValueBufferLength,
+                              IN OUT   PULONG          ReturnLength  OPTIONAL)
+{
+  ANSI_STRING AName;
+  UNICODE_STRING WName;
+  BOOLEAN Result;
+  PCH Value;
+  ANSI_STRING AValue;
+  UNICODE_STRING WValue;
+  KPROCESSOR_MODE PreviousMode;
+  NTSTATUS Status = STATUS_SUCCESS;
+  
+  PAGED_CODE();
+  
+  PreviousMode = ExGetPreviousMode();
+  
+  if(PreviousMode != KernelMode)
+  {
+    _SEH_TRY
+    {
+      ProbeForRead(VariableName,
+                   sizeof(UNICODE_STRING),
+                   sizeof(ULONG));
+      ProbeForWrite(ValueBuffer,
+                    ValueBufferLength,
+                    sizeof(WCHAR));
+      if(ReturnLength != NULL)
+      {
+        ProbeForWrite(ReturnLength,
+                      sizeof(ULONG),
+                      sizeof(ULONG));
+      }
+    }
+    _SEH_HANDLE
+    {
+      Status = _SEH_GetExceptionCode();
+    }
+    _SEH_END;
+    
+    if(!NT_SUCCESS(Status))
+    {
+      return Status;
+    }
+  }
+
+  /*
+   * Copy the name to kernel space if necessary and convert it to ANSI.
+   */
+  Status = RtlCaptureUnicodeString(&WName,
+                                   PreviousMode,
+                                   NonPagedPool,
+                                   FALSE,
+                                   VariableName);
+  if(NT_SUCCESS(Status))
+  {
+    /*
+     * according to ntinternals the SeSystemEnvironmentName privilege is required!
+     */
+    if(!SeSinglePrivilegeCheck(SeSystemEnvironmentPrivilege,
+                               PreviousMode))
+    {
+      RtlReleaseCapturedUnicodeString(&WName,
+                                     PreviousMode,
+                                     FALSE);
+      DPRINT1("NtQuerySystemEnvironmentValue: Caller requires the SeSystemEnvironmentPrivilege privilege!\n");
+      return STATUS_PRIVILEGE_NOT_HELD;
+    }
+    
+    /*
+     * convert the value name to ansi
+     */
+    Status = RtlUnicodeStringToAnsiString(&AName, &WName, TRUE);
+    RtlReleaseCapturedUnicodeString(&WName,
+                                   PreviousMode,
+                                   FALSE);
+    if(!NT_SUCCESS(Status))
+    {
+      return Status;
+    }
+    
+  /*
+   * Create a temporary buffer for the value
+   */
+    Value = ExAllocatePool(NonPagedPool, ValueBufferLength);
+    if (Value == NULL)
+    {
+      RtlFreeAnsiString(&AName);
+      return STATUS_INSUFFICIENT_RESOURCES;
+    }
+    
+    /*
+     * Get the environment variable
+     */
+    Result = HalGetEnvironmentVariable(AName.Buffer, Value, ValueBufferLength);
+    if(!Result)
+    {
+      RtlFreeAnsiString(&AName);
+      ExFreePool(Value);
+      return STATUS_UNSUCCESSFUL;
+    }
+    
+    /*
+     * Convert the result to UNICODE, protect with SEH in case the value buffer
+     * isn't NULL-terminated!
+     */
+    _SEH_TRY
+    {
+      RtlInitAnsiString(&AValue, Value);
+      Status = RtlAnsiStringToUnicodeString(&WValue, &AValue, TRUE);
+    }
+    _SEH_HANDLE
+    {
+      Status = _SEH_GetExceptionCode();
+    }
+    _SEH_END;
+
+    if(NT_SUCCESS(Status))
+    {
+      /*
+       * Copy the result back to the caller.
+       */
+      _SEH_TRY
+      {
+        RtlCopyMemory(ValueBuffer, WValue.Buffer, WValue.Length);
+        ValueBuffer[WValue.Length / sizeof(WCHAR)] = L'\0';
+        if(ReturnLength != NULL)
+        {
+          *ReturnLength = WValue.Length + sizeof(WCHAR);
+        }
+
+        Status = STATUS_SUCCESS;
+      }
+      _SEH_HANDLE
+      {
+        Status = _SEH_GetExceptionCode();
+      }
+      _SEH_END;
+    }
+    
+    /*
+     * Cleanup allocated resources.
+     */
+    RtlFreeAnsiString(&AName);
+    ExFreePool(Value);
+  }
+
+  return Status;
+}
+
+
+NTSTATUS STDCALL
+NtSetSystemEnvironmentValue (IN        PUNICODE_STRING VariableName,
+                            IN PUNICODE_STRING Value)
+{
+  UNICODE_STRING CapturedName, CapturedValue;
+  ANSI_STRING AName, AValue;
+  KPROCESSOR_MODE PreviousMode;
+  NTSTATUS Status;
+  
+  PAGED_CODE();
+
+  PreviousMode = ExGetPreviousMode();
+  
+  /*
+   * Copy the strings to kernel space if necessary
+   */
+  Status = RtlCaptureUnicodeString(&CapturedName,
+                                   PreviousMode,
+                                   NonPagedPool,
+                                   FALSE,
+                                   VariableName);
+  if(NT_SUCCESS(Status))
+  {
+    Status = RtlCaptureUnicodeString(&CapturedValue,
+                                     PreviousMode,
+                                     NonPagedPool,
+                                     FALSE,
+                                     Value);
+    if(NT_SUCCESS(Status))
+    {
+      /*
+       * according to ntinternals the SeSystemEnvironmentName privilege is required!
+       */
+      if(SeSinglePrivilegeCheck(SeSystemEnvironmentPrivilege,
+                                PreviousMode))
+      {
+        /*
+         * convert the strings to ANSI
+         */
+        Status = RtlUnicodeStringToAnsiString(&AName,
+                                              &CapturedName,
+                                              TRUE);
+        if(NT_SUCCESS(Status))
+        {
+          Status = RtlUnicodeStringToAnsiString(&AValue,
+                                                &CapturedValue,
+                                                TRUE);
+          if(NT_SUCCESS(Status))
+          {
+            BOOLEAN Result = HalSetEnvironmentVariable(AName.Buffer,
+                                                       AValue.Buffer);
+
+            Status = (Result ? STATUS_SUCCESS : STATUS_UNSUCCESSFUL);
+          }
+        }
+      }
+      else
+      {
+        DPRINT1("NtSetSystemEnvironmentValue: Caller requires the SeSystemEnvironmentPrivilege privilege!\n");
+        Status = STATUS_PRIVILEGE_NOT_HELD;
+      }
+      
+      RtlReleaseCapturedUnicodeString(&CapturedValue,
+                                     PreviousMode,
+                                     FALSE);
+    }
+
+    RtlReleaseCapturedUnicodeString(&CapturedName,
+                                   PreviousMode,
+                                   FALSE);
+  }
+  
+  return Status;
+}
+
+
+/* --- Query/Set System Information --- */
+
+/*
+ * NOTE: QSI_DEF(n) and SSI_DEF(n) define _cdecl function symbols
+ * so the stack is popped only in one place on x86 platform.
+ */
+#define QSI_USE(n) QSI##n
+#define QSI_DEF(n) \
+static NTSTATUS QSI_USE(n) (PVOID Buffer, ULONG Size, PULONG ReqSize)
+
+#define SSI_USE(n) SSI##n
+#define SSI_DEF(n) \
+static NTSTATUS SSI_USE(n) (PVOID Buffer, ULONG Size)
+
+
+/* Class 0 - Basic Information */
+QSI_DEF(SystemBasicInformation)
+{
+       PSYSTEM_BASIC_INFORMATION Sbi 
+               = (PSYSTEM_BASIC_INFORMATION) Buffer;
+
+       *ReqSize = sizeof (SYSTEM_BASIC_INFORMATION);
+       /*
+        * Check user buffer's size 
+        */
+       if (Size < sizeof (SYSTEM_BASIC_INFORMATION))
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       Sbi->Unknown = 0;
+       Sbi->MaximumIncrement = KeMaximumIncrement;
+       Sbi->PhysicalPageSize = PAGE_SIZE;
+       Sbi->NumberOfPhysicalPages = MmStats.NrTotalPages;
+       Sbi->LowestPhysicalPage = 0; /* FIXME */ 
+       Sbi->HighestPhysicalPage = MmStats.NrTotalPages; /* FIXME */
+       Sbi->AllocationGranularity = MM_VIRTMEM_GRANULARITY; /* hard coded on Intel? */
+       Sbi->LowestUserAddress = 0x10000; /* Top of 64k */
+       Sbi->HighestUserAddress = (ULONG_PTR)MmHighestUserAddress;
+       Sbi->ActiveProcessors = KeActiveProcessors;
+       Sbi->NumberProcessors = KeNumberProcessors;
+       return (STATUS_SUCCESS);
+}
+
+/* Class 1 - Processor Information */
+QSI_DEF(SystemProcessorInformation)
+{
+       PSYSTEM_PROCESSOR_INFORMATION Spi 
+               = (PSYSTEM_PROCESSOR_INFORMATION) Buffer;
+       PKPRCB Prcb;
+       *ReqSize = sizeof (SYSTEM_PROCESSOR_INFORMATION);
+       /*
+        * Check user buffer's size 
+        */
+       if (Size < sizeof (SYSTEM_PROCESSOR_INFORMATION))
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       Prcb = KeGetCurrentPrcb();
+       Spi->ProcessorArchitecture = 0; /* Intel Processor */
+       Spi->ProcessorLevel        = Prcb->CpuType;
+       Spi->ProcessorRevision     = Prcb->CpuStep;
+       Spi->Unknown               = 0;
+       Spi->FeatureBits           = Prcb->FeatureBits;
+
+       DPRINT("Arch %d Level %d Rev 0x%x\n", Spi->ProcessorArchitecture,
+               Spi->ProcessorLevel, Spi->ProcessorRevision);
+
+       return (STATUS_SUCCESS);
+}
+
+/* Class 2 - Performance Information */
+QSI_DEF(SystemPerformanceInformation)
+{
+       PSYSTEM_PERFORMANCE_INFORMATION Spi 
+               = (PSYSTEM_PERFORMANCE_INFORMATION) Buffer;
+
+       PEPROCESS TheIdleProcess;
+       
+       *ReqSize = sizeof (SYSTEM_PERFORMANCE_INFORMATION);
+       /*
+        * Check user buffer's size 
+        */
+       if (Size < sizeof (SYSTEM_PERFORMANCE_INFORMATION))
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       
+       TheIdleProcess = PsIdleProcess;
+       
+       Spi->IdleTime.QuadPart = TheIdleProcess->Pcb.KernelTime * 100000LL;
+
+       Spi->ReadTransferCount.QuadPart = IoReadTransferCount;
+       Spi->WriteTransferCount.QuadPart = IoWriteTransferCount;
+       Spi->OtherTransferCount.QuadPart = IoOtherTransferCount;
+       Spi->ReadOperationCount = IoReadOperationCount;
+       Spi->WriteOperationCount = IoWriteOperationCount;
+       Spi->OtherOperationCount = IoOtherOperationCount;
+
+       Spi->AvailablePages = MmStats.NrFreePages;
+/*
+        Add up all the used "Commitied" memory + pagefile.
+        Not sure this is right. 8^\
+ */
+       Spi->TotalCommittedPages = MiMemoryConsumers[MC_PPOOL].PagesUsed +
+                                  MiMemoryConsumers[MC_NPPOOL].PagesUsed+
+                                   MiMemoryConsumers[MC_CACHE].PagesUsed+
+                                  MiMemoryConsumers[MC_USER].PagesUsed+
+                                  MiUsedSwapPages;
+/*
+       Add up the full system total + pagefile.
+       All this make Taskmgr happy but not sure it is the right numbers.
+       This too, fixes some of GlobalMemoryStatusEx numbers.
+*/
+        Spi->TotalCommitLimit = MmStats.NrTotalPages + MiFreeSwapPages +
+                                MiUsedSwapPages;
+
+       Spi->PeakCommitment = 0; /* FIXME */
+       Spi->PageFaults = 0; /* FIXME */
+       Spi->WriteCopyFaults = 0; /* FIXME */
+       Spi->TransitionFaults = 0; /* FIXME */
+       Spi->CacheTransitionFaults = 0; /* FIXME */
+       Spi->DemandZeroFaults = 0; /* FIXME */
+       Spi->PagesRead = 0; /* FIXME */
+       Spi->PageReadIos = 0; /* FIXME */
+       Spi->CacheReads = 0; /* FIXME */
+       Spi->CacheIos = 0; /* FIXME */
+       Spi->PagefilePagesWritten = 0; /* FIXME */
+       Spi->PagefilePageWriteIos = 0; /* FIXME */
+       Spi->MappedFilePagesWritten = 0; /* FIXME */
+       Spi->MappedFilePageWriteIos = 0; /* FIXME */
+
+       Spi->PagedPoolUsage = MiMemoryConsumers[MC_PPOOL].PagesUsed;
+       Spi->PagedPoolAllocs = 0; /* FIXME */
+       Spi->PagedPoolFrees = 0; /* FIXME */
+       Spi->NonPagedPoolUsage = MiMemoryConsumers[MC_NPPOOL].PagesUsed;
+       Spi->NonPagedPoolAllocs = 0; /* FIXME */
+       Spi->NonPagedPoolFrees = 0; /* FIXME */
+
+       Spi->TotalFreeSystemPtes = 0; /* FIXME */
+       
+       Spi->SystemCodePage = MmStats.NrSystemPages; /* FIXME */
+       
+       Spi->TotalSystemDriverPages = 0; /* FIXME */
+       Spi->TotalSystemCodePages = 0; /* FIXME */
+       Spi->SmallNonPagedLookasideListAllocateHits = 0; /* FIXME */
+       Spi->SmallPagedLookasideListAllocateHits = 0; /* FIXME */
+       Spi->Reserved3 = 0; /* FIXME */
+
+       Spi->MmSystemCachePage = MiMemoryConsumers[MC_CACHE].PagesUsed;
+       Spi->PagedPoolPage = MmPagedPoolSize; /* FIXME */
+
+       Spi->SystemDriverPage = 0; /* FIXME */
+       Spi->FastReadNoWait = 0; /* FIXME */
+       Spi->FastReadWait = 0; /* FIXME */
+       Spi->FastReadResourceMiss = 0; /* FIXME */
+       Spi->FastReadNotPossible = 0; /* FIXME */
+
+       Spi->FastMdlReadNoWait = 0; /* FIXME */
+       Spi->FastMdlReadWait = 0; /* FIXME */
+       Spi->FastMdlReadResourceMiss = 0; /* FIXME */
+       Spi->FastMdlReadNotPossible = 0; /* FIXME */
+
+       Spi->MapDataNoWait = 0; /* FIXME */
+       Spi->MapDataWait = 0; /* FIXME */
+       Spi->MapDataNoWaitMiss = 0; /* FIXME */
+       Spi->MapDataWaitMiss = 0; /* FIXME */
+
+       Spi->PinMappedDataCount = 0; /* FIXME */
+       Spi->PinReadNoWait = 0; /* FIXME */
+       Spi->PinReadWait = 0; /* FIXME */
+       Spi->PinReadNoWaitMiss = 0; /* FIXME */
+       Spi->PinReadWaitMiss = 0; /* FIXME */
+       Spi->CopyReadNoWait = 0; /* FIXME */
+       Spi->CopyReadWait = 0; /* FIXME */
+       Spi->CopyReadNoWaitMiss = 0; /* FIXME */
+       Spi->CopyReadWaitMiss = 0; /* FIXME */
+
+       Spi->MdlReadNoWait = 0; /* FIXME */
+       Spi->MdlReadWait = 0; /* FIXME */
+       Spi->MdlReadNoWaitMiss = 0; /* FIXME */
+       Spi->MdlReadWaitMiss = 0; /* FIXME */
+       Spi->ReadAheadIos = 0; /* FIXME */
+       Spi->LazyWriteIos = 0; /* FIXME */
+       Spi->LazyWritePages = 0; /* FIXME */
+       Spi->DataFlushes = 0; /* FIXME */
+       Spi->DataPages = 0; /* FIXME */
+       Spi->ContextSwitches = 0; /* FIXME */
+       Spi->FirstLevelTbFills = 0; /* FIXME */
+       Spi->SecondLevelTbFills = 0; /* FIXME */
+       Spi->SystemCalls = 0; /* FIXME */
+
+       return (STATUS_SUCCESS);
+}
+
+/* Class 3 - Time Of Day Information */
+QSI_DEF(SystemTimeOfDayInformation)
+{
+  PSYSTEM_TIMEOFDAY_INFORMATION Sti;
+  LARGE_INTEGER CurrentTime;
+
+  Sti = (PSYSTEM_TIMEOFDAY_INFORMATION)Buffer;
+  *ReqSize = sizeof (SYSTEM_TIMEOFDAY_INFORMATION);
+
+  /* Check user buffer's size */
+  if (Size < sizeof (SYSTEM_TIMEOFDAY_INFORMATION))
+    {
+      return STATUS_INFO_LENGTH_MISMATCH;
+    }
+
+  KeQuerySystemTime(&CurrentTime);
+
+  Sti->BootTime= SystemBootTime;
+  Sti->CurrentTime = CurrentTime;
+  Sti->TimeZoneBias.QuadPart = ExpTimeZoneBias.QuadPart;
+  Sti->TimeZoneId = ExpTimeZoneId;
+  Sti->Reserved = 0;
+
+  return STATUS_SUCCESS;
+}
+
+/* Class 4 - Path Information */
+QSI_DEF(SystemPathInformation)
+{
+       /* FIXME: QSI returns STATUS_BREAKPOINT. Why? */
+       DPRINT1("NtQuerySystemInformation - SystemPathInformation not implemented\n");
+
+       return (STATUS_BREAKPOINT);
+}
+
+/* Class 5 - Process Information */
+QSI_DEF(SystemProcessInformation)
+{
+       ULONG ovlSize=0, nThreads;
+       PEPROCESS pr, syspr;
+       unsigned char *pCur;
+
+       /* scan the process list */
+
+       PSYSTEM_PROCESS_INFORMATION Spi
+               = (PSYSTEM_PROCESS_INFORMATION) Buffer;
+
+       *ReqSize = sizeof(SYSTEM_PROCESS_INFORMATION);
+
+       if (Size < sizeof(SYSTEM_PROCESS_INFORMATION))
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH); // in case buffer size is too small
+       }
+       
+       syspr = PsGetNextProcess(NULL);
+       pr = syspr;
+       pCur = (unsigned char *)Spi;
+
+       do
+       {
+               PSYSTEM_PROCESS_INFORMATION SpiCur;
+               int curSize, i = 0;
+               ANSI_STRING     imgName;
+               int inLen=32; // image name len in bytes
+               PLIST_ENTRY current_entry;
+               PETHREAD current;
+
+               SpiCur = (PSYSTEM_PROCESS_INFORMATION)pCur;
+
+               nThreads = 0;
+               current_entry = pr->ThreadListHead.Flink;
+               while (current_entry != &pr->ThreadListHead)
+               {
+                       nThreads++;
+                       current_entry = current_entry->Flink;
+               }
+
+               // size of the structure for every process
+               curSize = sizeof(SYSTEM_PROCESS_INFORMATION)-sizeof(SYSTEM_THREAD_INFORMATION)+sizeof(SYSTEM_THREAD_INFORMATION)*nThreads;
+               ovlSize += curSize+inLen;
+
+               if (ovlSize > Size)
+               {
+                       *ReqSize = ovlSize;
+                       ObDereferenceObject(pr);
+
+                       return (STATUS_INFO_LENGTH_MISMATCH); // in case buffer size is too small
+               }
+
+               // fill system information
+               SpiCur->NextEntryOffset = curSize+inLen; // relative offset to the beginnnig of the next structure
+               SpiCur->NumberOfThreads = nThreads;
+               SpiCur->CreateTime = pr->CreateTime;
+               SpiCur->UserTime.QuadPart = pr->Pcb.UserTime * 100000LL; 
+               SpiCur->KernelTime.QuadPart = pr->Pcb.KernelTime * 100000LL;
+               SpiCur->ImageName.Length = strlen(pr->ImageFileName) * sizeof(WCHAR);
+               SpiCur->ImageName.MaximumLength = inLen;
+               SpiCur->ImageName.Buffer = (void*)(pCur+curSize);
+
+               // copy name to the end of the struct
+               if(pr != PsIdleProcess)
+               {
+                 RtlInitAnsiString(&imgName, pr->ImageFileName);
+                 RtlAnsiStringToUnicodeString(&SpiCur->ImageName, &imgName, FALSE);
+               }
+               else
+               {
+                  RtlInitUnicodeString(&SpiCur->ImageName, NULL);
+               }
+
+               SpiCur->BasePriority = pr->Pcb.BasePriority;
+               SpiCur->UniqueProcessId = pr->UniqueProcessId;
+               SpiCur->InheritedFromUniqueProcessId = pr->InheritedFromUniqueProcessId;
+               SpiCur->HandleCount = (pr->ObjectTable ? ObpGetHandleCountByHandleTable(pr->ObjectTable) : 0);
+               SpiCur->PeakVirtualSize = pr->PeakVirtualSize;
+               SpiCur->VirtualSize = pr->VirtualSize.QuadPart;
+               SpiCur->PageFaultCount = pr->LastFaultCount;
+               SpiCur->PeakWorkingSetSize = pr->Vm.PeakWorkingSetSize; // Is this right using ->Vm. here ?
+               SpiCur->WorkingSetSize = pr->Vm.WorkingSetSize; // Is this right using ->Vm. here ?
+               SpiCur->QuotaPeakPagedPoolUsage =
+                                       pr->QuotaPeakPoolUsage[0];
+               SpiCur->QuotaPagedPoolUsage =
+                                       pr->QuotaPoolUsage[0];
+               SpiCur->QuotaPeakNonPagedPoolUsage =
+                                       pr->QuotaPeakPoolUsage[1];
+               SpiCur->QuotaNonPagedPoolUsage =
+                                       pr->QuotaPoolUsage[1];
+               SpiCur->PagefileUsage = pr->PagefileUsage; // FIXME
+               SpiCur->PeakPagefileUsage = pr->PeakPagefileUsage;
+               // KJK::Hyperion: I don't know what does this mean. VM_COUNTERS
+               // doesn't seem to contain any equivalent field
+               //SpiCur->TotalPrivateBytes = pr->NumberOfPrivatePages; //FIXME: bytes != pages
+
+          current_entry = pr->ThreadListHead.Flink;
+          while (current_entry != &pr->ThreadListHead)
+               {
+                 current = CONTAINING_RECORD(current_entry, ETHREAD,
+                                             ThreadListEntry);
+
+                 SpiCur->TH[i].KernelTime.QuadPart = current->Tcb.KernelTime * 100000LL;
+                 SpiCur->TH[i].UserTime.QuadPart = current->Tcb.UserTime * 100000LL;
+//                 SpiCur->TH[i].CreateTime = current->CreateTime;
+                 SpiCur->TH[i].WaitTime = current->Tcb.WaitTime;
+                 SpiCur->TH[i].StartAddress = (PVOID) current->StartAddress;
+                 SpiCur->TH[i].ClientId = current->Cid;
+                 SpiCur->TH[i].Priority = current->Tcb.Priority;
+                 SpiCur->TH[i].BasePriority = current->Tcb.BasePriority;
+                 SpiCur->TH[i].ContextSwitches = current->Tcb.ContextSwitches;
+                 SpiCur->TH[i].ThreadState = current->Tcb.State;
+                 SpiCur->TH[i].WaitReason = current->Tcb.WaitReason;
+                 i++;
+                 current_entry = current_entry->Flink;
+               }
+               
+               pr = PsGetNextProcess(pr);
+        nThreads = 0;
+               if ((pr == syspr) || (pr == NULL))
+               {
+                       SpiCur->NextEntryOffset = 0;
+                       break;
+               }
+               else
+                       pCur = pCur + curSize + inLen;
+       }  while ((pr != syspr) && (pr != NULL));
+       
+       if(pr != NULL)
+       {
+          ObDereferenceObject(pr);
+       }
+
+       *ReqSize = ovlSize;
+       return (STATUS_SUCCESS);
+}
+
+/* Class 6 - Call Count Information */
+QSI_DEF(SystemCallCountInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemCallCountInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 7 - Device Information */
+QSI_DEF(SystemDeviceInformation)
+{
+       PSYSTEM_DEVICE_INFORMATION Sdi 
+               = (PSYSTEM_DEVICE_INFORMATION) Buffer;
+       PCONFIGURATION_INFORMATION ConfigInfo;
+
+       *ReqSize = sizeof (SYSTEM_DEVICE_INFORMATION);
+       /*
+        * Check user buffer's size 
+        */
+       if (Size < sizeof (SYSTEM_DEVICE_INFORMATION))
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+
+       ConfigInfo = IoGetConfigurationInformation ();
+
+       Sdi->NumberOfDisks = ConfigInfo->DiskCount;
+       Sdi->NumberOfFloppies = ConfigInfo->FloppyCount;
+       Sdi->NumberOfCdRoms = ConfigInfo->CdRomCount;
+       Sdi->NumberOfTapes = ConfigInfo->TapeCount;
+       Sdi->NumberOfSerialPorts = ConfigInfo->SerialCount;
+       Sdi->NumberOfParallelPorts = ConfigInfo->ParallelCount;
+
+       return (STATUS_SUCCESS);
+}
+
+/* Class 8 - Processor Performance Information */
+QSI_DEF(SystemProcessorPerformanceInformation)
+{
+       PSYSTEM_PROCESSOR_PERFORMANCE_INFORMATION Spi
+               = (PSYSTEM_PROCESSOR_PERFORMANCE_INFORMATION) Buffer;
+
+        ULONG i;
+       LARGE_INTEGER CurrentTime;
+       PKPRCB Prcb;
+
+       *ReqSize = KeNumberProcessors * sizeof (SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION);
+       /*
+        * Check user buffer's size
+        */
+       if (Size < KeNumberProcessors * sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION))
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+
+       CurrentTime.QuadPart = KeQueryInterruptTime();
+       Prcb = ((PKPCR)KPCR_BASE)->Prcb;
+       for (i = 0; i < KeNumberProcessors; i++)
+       {
+          Spi->IdleTime.QuadPart = (Prcb->IdleThread->KernelTime + Prcb->IdleThread->UserTime) * 100000LL; // IdleTime
+           Spi->KernelTime.QuadPart =  Prcb->KernelTime * 100000LL; // KernelTime
+           Spi->UserTime.QuadPart = Prcb->UserTime * 100000LL;
+           Spi->DpcTime.QuadPart = Prcb->DpcTime * 100000LL;
+           Spi->InterruptTime.QuadPart = Prcb->InterruptTime * 100000LL;
+           Spi->InterruptCount = Prcb->InterruptCount; // Interrupt Count
+          Spi++;
+          Prcb = (PKPRCB)((ULONG_PTR)Prcb + PAGE_SIZE);
+       }
+
+       return (STATUS_SUCCESS);
+}
+
+/* Class 9 - Flags Information */
+QSI_DEF(SystemFlagsInformation)
+{
+       if (sizeof (SYSTEM_FLAGS_INFORMATION) != Size)
+       {
+               * ReqSize = sizeof (SYSTEM_FLAGS_INFORMATION);
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       ((PSYSTEM_FLAGS_INFORMATION) Buffer)->Flags = NtGlobalFlag;
+       return (STATUS_SUCCESS);
+}
+
+SSI_DEF(SystemFlagsInformation)
+{
+       if (sizeof (SYSTEM_FLAGS_INFORMATION) != Size)
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       NtGlobalFlag = ((PSYSTEM_FLAGS_INFORMATION) Buffer)->Flags;
+       return (STATUS_SUCCESS);
+}
+
+/* Class 10 - Call Time Information */
+QSI_DEF(SystemCallTimeInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemCallTimeInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 11 - Module Information */
+QSI_DEF(SystemModuleInformation)
+{
+       return LdrpQueryModuleInformation(Buffer, Size, ReqSize);
+}
+
+/* Class 12 - Locks Information */
+QSI_DEF(SystemLocksInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemLocksInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 13 - Stack Trace Information */
+QSI_DEF(SystemStackTraceInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemStackTraceInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 14 - Paged Pool Information */
+QSI_DEF(SystemPagedPoolInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemPagedPoolInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 15 - Non Paged Pool Information */
+QSI_DEF(SystemNonPagedPoolInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemNonPagedPoolInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+VOID
+ObpGetNextHandleByProcessCount(PSYSTEM_HANDLE_TABLE_ENTRY_INFO pshi,
+                               PEPROCESS Process,
+                               int Count);
+
+/* Class 16 - Handle Information */
+QSI_DEF(SystemHandleInformation)
+{
+        PSYSTEM_HANDLE_INFORMATION Shi = 
+               (PSYSTEM_HANDLE_INFORMATION) Buffer;
+
+        DPRINT("NtQuerySystemInformation - SystemHandleInformation\n");
+
+       if (Size < sizeof (SYSTEM_HANDLE_INFORMATION))
+        {
+               * ReqSize = sizeof (SYSTEM_HANDLE_INFORMATION);
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+
+       DPRINT("SystemHandleInformation 1\n");
+
+       PEPROCESS pr, syspr;
+       int curSize, i = 0;
+       ULONG hCount = 0;
+               
+        /* First Calc Size from Count. */
+        syspr = PsGetNextProcess(NULL);
+       pr = syspr;
+
+        do
+         {
+            hCount = hCount + (pr->ObjectTable ? ObpGetHandleCountByHandleTable(pr->ObjectTable) : 0);
+            pr = PsGetNextProcess(pr);
+
+           if ((pr == syspr) || (pr == NULL))
+               break;
+        } while ((pr != syspr) && (pr != NULL));
+        
+       if(pr != NULL)
+       {
+          ObDereferenceObject(pr);
+       }
+
+       DPRINT("SystemHandleInformation 2\n");
+
+        curSize = sizeof(SYSTEM_HANDLE_INFORMATION)+
+                  (  (sizeof(SYSTEM_HANDLE_TABLE_ENTRY_INFO) * hCount) - 
+                     (sizeof(SYSTEM_HANDLE_TABLE_ENTRY_INFO) ));
+
+        Shi->NumberOfHandles = hCount;
+
+        if (curSize > Size)
+          {
+            *ReqSize = curSize;
+             return (STATUS_INFO_LENGTH_MISMATCH);
+          }
+
+       DPRINT("SystemHandleInformation 3\n");
+
+        /* Now get Handles from all processs. */
+        syspr = PsGetNextProcess(NULL);
+       pr = syspr;
+
+        do
+         {
+            int Count = 0, HandleCount;
+
+            HandleCount = (pr->ObjectTable ? ObpGetHandleCountByHandleTable(pr->ObjectTable) : 0);
+
+            for (Count = 0; HandleCount > 0 ; HandleCount--)
+               {
+                 ObpGetNextHandleByProcessCount( &Shi->Handles[i], pr, Count);
+                 Count++;
+                 i++;
+               }
+
+           pr = PsGetNextProcess(pr);
+
+           if ((pr == syspr) || (pr == NULL))
+               break;
+          } while ((pr != syspr) && (pr != NULL));
+
+       if(pr != NULL)
+       {
+          ObDereferenceObject(pr);
+       }
+
+       DPRINT("SystemHandleInformation 4\n");
+       return (STATUS_SUCCESS);
+
+}
+/*
+SSI_DEF(SystemHandleInformation)
+{
+       
+       return (STATUS_SUCCESS);
+}
+*/
+
+/* Class 17 -  Information */
+QSI_DEF(SystemObjectInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemObjectInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 18 -  Information */
+QSI_DEF(SystemPageFileInformation)
+{
+       SYSTEM_PAGEFILE_INFORMATION *Spfi = (SYSTEM_PAGEFILE_INFORMATION *) Buffer;
+
+       if (Size < sizeof (SYSTEM_PAGEFILE_INFORMATION))
+       {
+               * ReqSize = sizeof (SYSTEM_PAGEFILE_INFORMATION);
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+
+       UNICODE_STRING FileName; /* FIXME */
+
+       /* FIXME */
+       Spfi->NextEntryOffset = 0;
+
+       Spfi->TotalSize = MiFreeSwapPages + MiUsedSwapPages;
+       Spfi->TotalInUse = MiUsedSwapPages;
+       Spfi->PeakUsage = MiUsedSwapPages; /* FIXME */
+       Spfi->PageFileName = FileName;
+       return (STATUS_SUCCESS);
+}
+
+/* Class 19 - Vdm Instemul Information */
+QSI_DEF(SystemVdmInstemulInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemVdmInstemulInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 20 - Vdm Bop Information */
+QSI_DEF(SystemVdmBopInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemVdmBopInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 21 - File Cache Information */
+QSI_DEF(SystemFileCacheInformation)
+{
+       SYSTEM_CACHE_INFORMATION *Sci = (SYSTEM_CACHE_INFORMATION *) Buffer;
+
+       if (Size < sizeof (SYSTEM_CACHE_INFORMATION))
+       {
+               * ReqSize = sizeof (SYSTEM_CACHE_INFORMATION);
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       /* Return the Byte size not the page size. */
+       Sci->CurrentSize = 
+               MiMemoryConsumers[MC_CACHE].PagesUsed * PAGE_SIZE;
+       Sci->PeakSize = 
+               MiMemoryConsumers[MC_CACHE].PagesUsed * PAGE_SIZE; /* FIXME */
+
+       Sci->PageFaultCount = 0; /* FIXME */
+       Sci->MinimumWorkingSet = 0; /* FIXME */
+       Sci->MaximumWorkingSet = 0; /* FIXME */
+       Sci->TransitionSharedPages = 0; /* FIXME */
+       Sci->TransitionSharedPagesPeak = 0; /* FIXME */
+
+       return (STATUS_SUCCESS);
+}
+
+SSI_DEF(SystemFileCacheInformation)
+{
+       if (Size < sizeof (SYSTEM_CACHE_INFORMATION))
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemFileCacheInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 22 - Pool Tag Information */
+QSI_DEF(SystemPoolTagInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemPoolTagInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 23 - Interrupt Information for all processors */
+QSI_DEF(SystemInterruptInformation)
+{
+  PKPRCB Prcb;
+  UINT i;
+  ULONG ti;
+  PSYSTEM_INTERRUPT_INFORMATION sii = (PSYSTEM_INTERRUPT_INFORMATION)Buffer;
+  
+  if(Size < KeNumberProcessors * sizeof(SYSTEM_INTERRUPT_INFORMATION))
+  {
+    return (STATUS_INFO_LENGTH_MISMATCH);
+  }
+  
+  ti = KeQueryTimeIncrement();
+  
+  Prcb = ((PKPCR)KPCR_BASE)->Prcb;
+  for (i = 0; i < KeNumberProcessors; i++)
+  {
+    sii->ContextSwitches = Prcb->KeContextSwitches;
+    sii->DpcCount = 0; /* FIXME */
+    sii->DpcRate = 0; /* FIXME */
+    sii->TimeIncrement = ti;
+    sii->DpcBypassCount = 0; /* FIXME */
+    sii->ApcBypassCount = 0; /* FIXME */
+    sii++;
+    Prcb = (PKPRCB)((ULONG_PTR)Prcb + PAGE_SIZE);
+  }
+  
+  return STATUS_SUCCESS;
+}
+
+/* Class 24 - DPC Behaviour Information */
+QSI_DEF(SystemDpcBehaviourInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemDpcBehaviourInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+SSI_DEF(SystemDpcBehaviourInformation)
+{
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemDpcBehaviourInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 25 - Full Memory Information */
+QSI_DEF(SystemFullMemoryInformation)
+{
+       PULONG Spi = (PULONG) Buffer;
+
+       PEPROCESS TheIdleProcess;
+
+       * ReqSize = sizeof (ULONG);
+
+       if (sizeof (ULONG) != Size)
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       DPRINT("SystemFullMemoryInformation\n");
+
+       TheIdleProcess = PsIdleProcess;
+
+        DPRINT("PID: %d, KernelTime: %u PFFree: %d PFUsed: %d\n",
+               TheIdleProcess->UniqueProcessId,
+               TheIdleProcess->Pcb.KernelTime,
+               MiFreeSwapPages,
+               MiUsedSwapPages);
+
+#ifndef NDEBUG
+       MmPrintMemoryStatistic();
+#endif
+       
+       *Spi = MiMemoryConsumers[MC_USER].PagesUsed;
+
+       return (STATUS_SUCCESS);
+}
+
+/* Class 26 - Load Image */
+SSI_DEF(SystemLoadImage)
+{
+  PSYSTEM_LOAD_IMAGE Sli = (PSYSTEM_LOAD_IMAGE)Buffer;
+
+  if (sizeof(SYSTEM_LOAD_IMAGE) != Size)
+    {
+      return(STATUS_INFO_LENGTH_MISMATCH);
+    }
+
+  return(LdrpLoadImage(&Sli->ModuleName,
+                      &Sli->ModuleBase,
+                      &Sli->SectionPointer,
+                      &Sli->EntryPoint,
+                      &Sli->ExportDirectory));
+}
+
+/* Class 27 - Unload Image */
+SSI_DEF(SystemUnloadImage)
+{
+  PSYSTEM_UNLOAD_IMAGE Sui = (PSYSTEM_UNLOAD_IMAGE)Buffer;
+
+  if (sizeof(SYSTEM_UNLOAD_IMAGE) != Size)
+    {
+      return(STATUS_INFO_LENGTH_MISMATCH);
+    }
+
+  return(LdrpUnloadImage(Sui->ModuleBase));
+}
+
+/* Class 28 - Time Adjustment Information */
+QSI_DEF(SystemTimeAdjustmentInformation)
+{
+       if (sizeof (SYSTEM_SET_TIME_ADJUSTMENT) > Size)
+       {
+               * ReqSize = sizeof (SYSTEM_SET_TIME_ADJUSTMENT);
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       /* FIXME: */
+       DPRINT1("NtQuerySystemInformation - SystemTimeAdjustmentInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+SSI_DEF(SystemTimeAdjustmentInformation)
+{
+       if (sizeof (SYSTEM_SET_TIME_ADJUSTMENT) > Size)
+       {
+               return (STATUS_INFO_LENGTH_MISMATCH);
+       }
+       /* FIXME: */
+       DPRINT1("NtSetSystemInformation - SystemTimeAdjustmentInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 29 - Summary Memory Information */
+QSI_DEF(SystemSummaryMemoryInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemSummaryMemoryInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 30 - Next Event Id Information */
+QSI_DEF(SystemNextEventIdInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemNextEventIdInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 31 - Event Ids Information */
+QSI_DEF(SystemEventIdsInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemEventIdsInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 32 - Crash Dump Information */
+QSI_DEF(SystemCrashDumpInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemCrashDumpInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 33 - Exception Information */
+QSI_DEF(SystemExceptionInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemExceptionInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 34 - Crash Dump State Information */
+QSI_DEF(SystemCrashDumpStateInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemCrashDumpStateInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 35 - Kernel Debugger Information */
+QSI_DEF(SystemKernelDebuggerInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemKernelDebuggerInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 36 - Context Switch Information */
+QSI_DEF(SystemContextSwitchInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemContextSwitchInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 37 - Registry Quota Information */
+QSI_DEF(SystemRegistryQuotaInformation)
+{
+  PSYSTEM_REGISTRY_QUOTA_INFORMATION srqi = (PSYSTEM_REGISTRY_QUOTA_INFORMATION) Buffer;
+
+  *ReqSize = sizeof(SYSTEM_REGISTRY_QUOTA_INFORMATION);
+  if (Size < sizeof(SYSTEM_REGISTRY_QUOTA_INFORMATION))
+    {
+      return STATUS_INFO_LENGTH_MISMATCH;
+    }
+
+  DPRINT1("Faking max registry size of 32 MB\n");
+  srqi->RegistryQuotaAllowed = 0x2000000;
+  srqi->RegistryQuotaUsed = 0x200000;
+  srqi->Reserved1 = (void*)0x200000;
+
+  return STATUS_SUCCESS;
+}
+
+SSI_DEF(SystemRegistryQuotaInformation)
+{
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemRegistryQuotaInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 38 - Load And Call Image */
+SSI_DEF(SystemLoadAndCallImage)
+{
+  PSYSTEM_LOAD_AND_CALL_IMAGE Slci = (PSYSTEM_LOAD_AND_CALL_IMAGE)Buffer;
+
+  if (sizeof(SYSTEM_LOAD_AND_CALL_IMAGE) != Size)
+    {
+      return(STATUS_INFO_LENGTH_MISMATCH);
+    }
+
+  return(LdrpLoadAndCallImage(&Slci->ModuleName));
+}
+
+/* Class 39 - Priority Separation */
+SSI_DEF(SystemPrioritySeperation)
+{
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemPrioritySeperation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 40 - Plug Play Bus Information */
+QSI_DEF(SystemPlugPlayBusInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemPlugPlayBusInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 41 - Dock Information */
+QSI_DEF(SystemDockInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemDockInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 42 - Power Information */
+QSI_DEF(SystemPowerInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemPowerInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 43 - Processor Speed Information */
+QSI_DEF(SystemProcessorSpeedInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemProcessorSpeedInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+/* Class 44 - Current Time Zone Information */
+QSI_DEF(SystemCurrentTimeZoneInformation)
+{
+  * ReqSize = sizeof (TIME_ZONE_INFORMATION);
+
+  if (sizeof (TIME_ZONE_INFORMATION) != Size)
+    {
+      return STATUS_INFO_LENGTH_MISMATCH;
+    }
+
+  /* Copy the time zone information struct */
+  memcpy(Buffer,
+         &ExpTimeZoneInfo,
+         sizeof(TIME_ZONE_INFORMATION));
+
+  return STATUS_SUCCESS;
+}
+
+
+SSI_DEF(SystemCurrentTimeZoneInformation)
+{
+  /* Check user buffer's size */
+  if (Size < sizeof (TIME_ZONE_INFORMATION))
+    {
+      return STATUS_INFO_LENGTH_MISMATCH;
+    }
+
+  return ExpSetTimeZoneInformation((PTIME_ZONE_INFORMATION)Buffer);
+}
+
+
+/* Class 45 - Lookaside Information */
+QSI_DEF(SystemLookasideInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemLookasideInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Class 46 - Set time slip event */
+SSI_DEF(SystemSetTimeSlipEvent)
+{
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemSetTimSlipEvent not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Class 47 - Create a new session (TSE) */
+SSI_DEF(SystemCreateSession)
+{
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemCreateSession not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Class 48 - Delete an existing session (TSE) */
+SSI_DEF(SystemDeleteSession)
+{
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemDeleteSession not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Class 49 - UNKNOWN */
+QSI_DEF(SystemInvalidInfoClass4)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemInvalidInfoClass4 not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Class 50 - System range start address */
+QSI_DEF(SystemRangeStartInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemRangeStartInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Class 51 - Driver verifier information */
+QSI_DEF(SystemVerifierInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemVerifierInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+SSI_DEF(SystemVerifierInformation)
+{
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemVerifierInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Class 52 - Add a driver verifier */
+SSI_DEF(SystemAddVerifier)
+{
+       /* FIXME */
+       DPRINT1("NtSetSystemInformation - SystemAddVerifier not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Class 53 - A session's processes  */
+QSI_DEF(SystemSessionProcessesInformation)
+{
+       /* FIXME */
+       DPRINT1("NtQuerySystemInformation - SystemSessionProcessInformation not implemented\n");
+       return (STATUS_NOT_IMPLEMENTED);
+}
+
+
+/* Query/Set Calls Table */
+typedef
+struct _QSSI_CALLS
+{
+       NTSTATUS (* Query) (PVOID,ULONG,PULONG);
+       NTSTATUS (* Set) (PVOID,ULONG);
+
+} QSSI_CALLS;
+
+// QS  Query & Set
+// QX  Query
+// XS  Set
+// XX  unknown behaviour
+//
+#define SI_QS(n) {QSI_USE(n),SSI_USE(n)}
+#define SI_QX(n) {QSI_USE(n),NULL}
+#define SI_XS(n) {NULL,SSI_USE(n)}
+#define SI_XX(n) {NULL,NULL}
+
+static
+QSSI_CALLS
+CallQS [] =
+{
+       SI_QX(SystemBasicInformation),
+       SI_QX(SystemProcessorInformation),
+       SI_QX(SystemPerformanceInformation),
+       SI_QX(SystemTimeOfDayInformation),
+       SI_QX(SystemPathInformation), /* should be SI_XX */
+       SI_QX(SystemProcessInformation),
+       SI_QX(SystemCallCountInformation),
+       SI_QX(SystemDeviceInformation),
+       SI_QX(SystemProcessorPerformanceInformation),
+       SI_QS(SystemFlagsInformation),
+       SI_QX(SystemCallTimeInformation), /* should be SI_XX */
+       SI_QX(SystemModuleInformation),
+       SI_QX(SystemLocksInformation),
+       SI_QX(SystemStackTraceInformation), /* should be SI_XX */
+       SI_QX(SystemPagedPoolInformation), /* should be SI_XX */
+       SI_QX(SystemNonPagedPoolInformation), /* should be SI_XX */
+       SI_QX(SystemHandleInformation),
+       SI_QX(SystemObjectInformation),
+       SI_QX(SystemPageFileInformation),
+       SI_QX(SystemVdmInstemulInformation),
+       SI_QX(SystemVdmBopInformation), /* it should be SI_XX */
+       SI_QS(SystemFileCacheInformation),
+       SI_QX(SystemPoolTagInformation),
+       SI_QX(SystemInterruptInformation),
+       SI_QS(SystemDpcBehaviourInformation),
+       SI_QX(SystemFullMemoryInformation), /* it should be SI_XX */
+       SI_XS(SystemLoadImage),
+       SI_XS(SystemUnloadImage),
+       SI_QS(SystemTimeAdjustmentInformation),
+       SI_QX(SystemSummaryMemoryInformation), /* it should be SI_XX */
+       SI_QX(SystemNextEventIdInformation), /* it should be SI_XX */
+       SI_QX(SystemEventIdsInformation), /* it should be SI_XX */
+       SI_QX(SystemCrashDumpInformation),
+       SI_QX(SystemExceptionInformation),
+       SI_QX(SystemCrashDumpStateInformation),
+       SI_QX(SystemKernelDebuggerInformation),
+       SI_QX(SystemContextSwitchInformation),
+       SI_QS(SystemRegistryQuotaInformation),
+       SI_XS(SystemLoadAndCallImage),
+       SI_XS(SystemPrioritySeperation),
+       SI_QX(SystemPlugPlayBusInformation), /* it should be SI_XX */
+       SI_QX(SystemDockInformation), /* it should be SI_XX */
+       SI_QX(SystemPowerInformation), /* it should be SI_XX */
+       SI_QX(SystemProcessorSpeedInformation), /* it should be SI_XX */
+       SI_QS(SystemCurrentTimeZoneInformation), /* it should be SI_QX */
+       SI_QX(SystemLookasideInformation),
+       SI_XS(SystemSetTimeSlipEvent),
+       SI_XS(SystemCreateSession),
+       SI_XS(SystemDeleteSession),
+       SI_QX(SystemInvalidInfoClass4), /* it should be SI_XX */
+       SI_QX(SystemRangeStartInformation),
+       SI_QS(SystemVerifierInformation),
+       SI_XS(SystemAddVerifier),
+       SI_QX(SystemSessionProcessesInformation)
+};
+
+
+/*
+ * @implemented
+ */
+NTSTATUS STDCALL
+NtQuerySystemInformation (IN SYSTEM_INFORMATION_CLASS SystemInformationClass,
+                         OUT PVOID UnsafeSystemInformation,
+                         IN ULONG Length,
+                         OUT PULONG UnsafeResultLength)
+{
+  ULONG ResultLength;
+  PVOID SystemInformation;
+  NTSTATUS Status;
+  NTSTATUS FStatus;
+  
+  PAGED_CODE();
+
+/*     DPRINT("NtQuerySystemInformation Start. Class:%d\n",
+                                       SystemInformationClass );
+*/
+  /*if (ExGetPreviousMode() == KernelMode)
+    {*/
+      SystemInformation = UnsafeSystemInformation;
+    /*}
+  else
+    {
+      SystemInformation = ExAllocatePool(NonPagedPool, Length);
+      if (SystemInformation == NULL)
+       {
+         return(STATUS_NO_MEMORY);
+       }
+    }*/
+  
+  /* Clear user buffer. */
+  RtlZeroMemory(SystemInformation, Length);
+
+  /*
+   * Check the request is valid.
+   */
+  if ((SystemInformationClass >= SystemInformationClassMin) && 
+      (SystemInformationClass < SystemInformationClassMax))
+    {
+      if (NULL != CallQS [SystemInformationClass].Query)
+       {
+         /*
+          * Hand the request to a subhandler.
+          */
+         FStatus = CallQS [SystemInformationClass].Query(SystemInformation,
+                                                         Length,
+                                                         &ResultLength);
+         /*if (ExGetPreviousMode() != KernelMode)
+           {
+             Status = MmCopyToCaller(UnsafeSystemInformation, 
+                                     SystemInformation,
+                                     Length);
+             ExFreePool(SystemInformation);
+             if (!NT_SUCCESS(Status))
+               {
+                 return(Status);
+               }
+           }*/
+         if (UnsafeResultLength != NULL)
+           {
+             /*if (ExGetPreviousMode() == KernelMode)
+               {
+                 *UnsafeResultLength = ResultLength;
+               }
+             else
+               {*/
+                 Status = MmCopyToCaller(UnsafeResultLength,
+                                         &ResultLength,
+                                         sizeof(ULONG));
+                 if (!NT_SUCCESS(Status))
+                   {
+                     return(Status);
+                   }
+               /*}*/
+           }
+         return(FStatus);
+       }
+    }
+  return (STATUS_INVALID_INFO_CLASS);
 }
 
 
 NTSTATUS
 STDCALL
 NtSetSystemInformation (
-       IN      CINT    SystemInformationClass,
-       IN      PVOID   SystemInformation,
-       IN      ULONG   SystemInformationLength
+       IN      SYSTEM_INFORMATION_CLASS        SystemInformationClass,
+       IN      PVOID                           SystemInformation,
+       IN      ULONG                           SystemInformationLength
        )
 {
-       UNIMPLEMENTED;
+        PAGED_CODE();
+        
+       /*
+        * If called from user mode, check 
+        * possible unsafe arguments.
+        */
+#if 0
+        if (KernelMode != KeGetPreviousMode())
+        {
+               // Check arguments
+               //ProbeForWrite(
+               //      SystemInformation,
+               //      Length
+               //      );
+               //ProbeForWrite(
+               //      ResultLength,
+               //      sizeof (ULONG)
+               //      );
+        }
+#endif
+       /*
+        * Check the request is valid.
+        */
+       if (    (SystemInformationClass >= SystemInformationClassMin)
+               && (SystemInformationClass < SystemInformationClassMax)
+               )
+       {
+               if (NULL != CallQS [SystemInformationClass].Set)
+               {
+                       /*
+                        * Hand the request to a subhandler.
+                        */
+                       return CallQS [SystemInformationClass].Set (
+                                       SystemInformation,
+                                       SystemInformationLength
+                                       );
+               }
+       }
+       return (STATUS_INVALID_INFO_CLASS);
 }
 
 
@@ -73,5 +1640,11 @@ NtFlushInstructionCache (
        IN      UINT    NumberOfBytesToFlush
        )
 {
-       UNIMPLEMENTED;
+        PAGED_CODE();
+        
+       __asm__("wbinvd\n");
+       return STATUS_SUCCESS;
 }
+
+
+/* EOF */