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Windows2000/private/ntos/ex/sysinfo.c

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/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
sysinfo.c
Abstract:
This module implements the NT set and query system information services.
Author:
Steve Wood (stevewo) 21-Aug-1989
Environment:
Kernel mode only.
--*/
#include "exp.h"
#pragma hdrstop
#include "stdlib.h"
#include "string.h"
#include "vdmntos.h"
#include <nturtl.h>
#include "pool.h"
#include "stktrace.h"
#include "align.h"
#include "..\..\..\inc\alpha.h"
extern PVOID PspCidTable; // BUGBUG - Copied from ps\psp.h
extern ULONG MmAvailablePages;
extern ULONG MmTotalCommittedPages;
extern ULONG MmTotalCommitLimit;
extern ULONG MmPeakCommitment;
extern ULONG MmLowestPhysicalPage;
extern ULONG MmHighestPhysicalPage;
extern ULONG MmTotalFreeSystemPtes[1];
extern ULONG MmSystemCodePage;
extern ULONG MmSystemCachePage;
extern ULONG MmPagedPoolPage;
extern ULONG MmSystemDriverPage;
extern ULONG MmTotalSystemCodePages;
extern ULONG MmTotalSystemDriverPages;
extern RTL_TIME_ZONE_INFORMATION ExpTimeZoneInformation;
// For SystemDpcBehaviorInformation
extern ULONG KiMaximumDpcQueueDepth;
extern ULONG KiMinimumDpcRate;
extern ULONG KiAdjustDpcThreshold;
extern ULONG KiIdealDpcRate;
extern LIST_ENTRY MmLoadedUserImageList;
extern MMSUPPORT MmSystemCacheWs;
extern ULONG MmTransitionSharedPages;
extern ULONG MmTransitionSharedPagesPeak;
#define ROUND_UP(VALUE,ROUND) ((ULONG)(((ULONG)VALUE + ((ULONG)ROUND - 1L)) & (~((ULONG)ROUND - 1L))))
// For referencing a user-supplied event handle
extern POBJECT_TYPE ExEventObjectType;
NTSTATUS ExpValidateLocale(IN LCID LocaleId);
NTSTATUS ExpGetCurrentUserUILanguage(IN WCHAR *ValueName, OUT LANGID *CurrentUserUILanguageId);
NTSTATUS ExpSetCurrentUserUILanguage(IN WCHAR *ValueName, IN LANGID DefaultUILanguageId);
NTSTATUS ExpGetUILanguagePolicy(IN HANDLE CurrentUserKey, OUT LANGID *PolicyUILanguageId);
NTSTATUS ExpGetProcessInformation (OUT PVOID SystemInformation, IN ULONG SystemInformationLength, OUT PULONG Length, IN PULONG SessionId OPTIONAL);
VOID ExpCopyProcessInfo (IN PSYSTEM_PROCESS_INFORMATION ProcessInfo, IN PEPROCESS Process);
VOID ExpCopyThreadInfo (IN PSYSTEM_THREAD_INFORMATION ThreadInfo, IN PETHREAD Thread);
#if i386 && !FPO
NTSTATUS ExpGetStackTraceInformation (OUT PVOID SystemInformation, IN ULONG SystemInformationLength, OUT PULONG Length);
#endif // i386 && !FPO
NTSTATUS ExpGetLockInformation(OUT PVOID SystemInformation, IN ULONG SystemInformationLength, OUT PULONG Length);
NTSTATUS ExpGetLookasideInformation(OUT PVOID Buffer, IN ULONG BufferLength, OUT PULONG Length);
NTSTATUS ExpGetPoolInformation(IN POOL_TYPE PoolType, OUT PVOID SystemInformation, IN ULONG SystemInformationLength, OUT PULONG Length);
NTSTATUS ExpGetHandleInformation(OUT PVOID SystemInformation, IN ULONG SystemInformationLength, OUT PULONG Length);
NTSTATUS ExpGetObjectInformation(OUT PVOID SystemInformation, IN ULONG SystemInformationLength, OUT PULONG Length);
NTSTATUS ExpGetInstemulInformation(OUT PSYSTEM_VDM_INSTEMUL_INFO Info);
NTSTATUS ExpGetPoolTagInfo(IN PVOID SystemInformation, IN ULONG SystemInformationLength, IN OUT PULONG ReturnLength OPTIONAL);
NTSTATUS ExpQueryModuleInformation(IN PLIST_ENTRY LoadOrderListHead, IN PLIST_ENTRY UserModeLoadOrderListHead, OUT PRTL_PROCESS_MODULES ModuleInformation, IN ULONG ModuleInformationLength, OUT PULONG ReturnLength OPTIONAL);
NTSTATUS ExpQueryLegacyDriverInformation(IN PSYSTEM_LEGACY_DRIVER_INFORMATION LegacyInfo, IN PULONG Length);
#if defined(ALLOC_PRAGMA)
#pragma alloc_text(PAGE, NtQueryDefaultLocale)
#pragma alloc_text(PAGE, NtSetDefaultLocale)
#pragma alloc_text(PAGE, NtQueryInstallUILanguage)
#pragma alloc_text(PAGE, NtQueryDefaultUILanguage)
#pragma alloc_text(PAGE, ExpGetCurrentUserUILanguage)
#pragma alloc_text(PAGE, NtSetDefaultUILanguage)
#pragma alloc_text(PAGE, ExpSetCurrentUserUILanguage)
#pragma alloc_text(PAGE, ExpValidateLocale)
#pragma alloc_text(PAGE, ExpGetUILanguagePolicy)
#pragma alloc_text(PAGE, NtQuerySystemInformation)
#pragma alloc_text(PAGE, NtSetSystemInformation)
#pragma alloc_text(PAGE, ExpGetHandleInformation)
#pragma alloc_text(PAGE, ExpGetObjectInformation)
#pragma alloc_text(PAGE, ExpQueryModuleInformation)
#pragma alloc_text(PAGE, ExpCopyProcessInfo)
#pragma alloc_text(PAGE, ExpQueryLegacyDriverInformation)
#pragma alloc_text(PAGELK, ExpGetProcessInformation)
#pragma alloc_text(PAGELK, ExpCopyThreadInfo)
#pragma alloc_text(PAGELK, ExpGetLockInformation)
#pragma alloc_text(PAGELK, ExpGetLookasideInformation)
#pragma alloc_text(PAGELK, ExpGetPoolInformation)
#endif
NTSTATUS NtQueryDefaultLocale(IN BOOLEAN UserProfile, OUT PLCID DefaultLocaleId)
{
KPROCESSOR_MODE PreviousMode;
NTSTATUS Status;
PAGED_CODE();
Status = STATUS_SUCCESS;
try {
// Get previous processor mode and probe output argument if necessary.
PreviousMode = KeGetPreviousMode();
if (PreviousMode != KernelMode) {
ProbeForWriteUlong( (PULONG)DefaultLocaleId );
}
if (UserProfile) {
*DefaultLocaleId = PsDefaultThreadLocaleId;
}
else {
*DefaultLocaleId = PsDefaultSystemLocaleId;
}
}
except (EXCEPTION_EXECUTE_HANDLER) {
Status = GetExceptionCode();
}
return Status;
}
NTSTATUS NtSetDefaultLocale(IN BOOLEAN UserProfile, IN LCID DefaultLocaleId)
{
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING KeyPath, KeyValueName;
HANDLE CurrentUserKey, Key;
WCHAR KeyValueBuffer[ 128 ];
PKEY_VALUE_PARTIAL_INFORMATION KeyValueInformation;
ULONG ResultLength;
PWSTR s;
ULONG n, i, Digit;
WCHAR c;
PAGED_CODE();
if (DefaultLocaleId & 0xFFFF0000) {
return STATUS_INVALID_PARAMETER;
}
KeyValueInformation = (PKEY_VALUE_PARTIAL_INFORMATION)KeyValueBuffer;
if (UserProfile) {
Status = RtlOpenCurrentUser( MAXIMUM_ALLOWED, &CurrentUserKey );
if (!NT_SUCCESS( Status )) {
return Status;
}
RtlInitUnicodeString( &KeyValueName, L"Locale" );
RtlInitUnicodeString( &KeyPath, L"Control Panel\\International" );
}
else {
RtlInitUnicodeString( &KeyValueName, L"Default" );
RtlInitUnicodeString( &KeyPath, L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Nls\\Language" );
CurrentUserKey = NULL;
}
InitializeObjectAttributes( &ObjectAttributes, &KeyPath, (OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE), CurrentUserKey, NULL);
if (DefaultLocaleId == 0) {
Status = ZwOpenKey( &Key, GENERIC_READ, &ObjectAttributes);
if (NT_SUCCESS( Status )) {
Status = ZwQueryValueKey( Key, &KeyValueName, KeyValuePartialInformation, KeyValueInformation, sizeof( KeyValueBuffer ), &ResultLength);
if (NT_SUCCESS( Status )) {
if (KeyValueInformation->Type == REG_SZ) {
s = (PWSTR)KeyValueInformation->Data;
for (i=0; i<KeyValueInformation->DataLength; i += sizeof( WCHAR )) {
c = *s++;
if (c >= L'0' && c <= L'9') {
Digit = c - L'0';
}
else
if (c >= L'A' && c <= L'F') {
Digit = c - L'A' + 10;
}
else
if (c >= L'a' && c <= L'f') {
Digit = c - L'a' + 10;
}
else {
break;
}
if (Digit >= 16) {
break;
}
DefaultLocaleId = (DefaultLocaleId << 4) | Digit;
}
}
else
if (KeyValueInformation->Type == REG_DWORD && KeyValueInformation->DataLength == sizeof( ULONG )) {
DefaultLocaleId = *(PLCID)KeyValueInformation->Data;
}
else {
Status = STATUS_UNSUCCESSFUL;
}
}
ZwClose( Key );
}
}
else {
Status = ExpValidateLocale( DefaultLocaleId );
if (NT_SUCCESS(Status)) {
Status = ZwOpenKey( &Key, GENERIC_WRITE, &ObjectAttributes);
if (NT_SUCCESS( Status )) {
if (UserProfile) {
n = 8;
}
else {
n = 4;
}
s = &KeyValueBuffer[ n ];
*s-- = UNICODE_NULL;
i = (ULONG)DefaultLocaleId;
while (s >= KeyValueBuffer) {
Digit = i & 0x0000000F;
if (Digit <= 9) {
*s-- = (WCHAR)(Digit + L'0');
}
else {
*s-- = (WCHAR)((Digit - 10) + L'A');
}
i = i >> 4;
}
Status = ZwSetValueKey( Key, &KeyValueName, 0, REG_SZ, KeyValueBuffer, (n+1) * sizeof( WCHAR ));
ZwClose( Key );
}
}
}
ZwClose( CurrentUserKey );
if (NT_SUCCESS( Status )) {
if (UserProfile) {
PsDefaultThreadLocaleId = DefaultLocaleId;
}
else {
PsDefaultSystemLocaleId = DefaultLocaleId;
}
}
return Status;
}
NTSTATUS NtQueryInstallUILanguage(OUT LANGID *InstallUILanguageId)
{
KPROCESSOR_MODE PreviousMode;
NTSTATUS Status;
PAGED_CODE();
Status = STATUS_SUCCESS;
try {
// Get previous processor mode and probe output argument if necessary.
PreviousMode = KeGetPreviousMode();
if (PreviousMode != KernelMode) {
ProbeForWriteUshort( (USHORT *)InstallUILanguageId );
}
*InstallUILanguageId = PsInstallUILanguageId;
}
except (EXCEPTION_EXECUTE_HANDLER) {
Status = GetExceptionCode();
}
return Status;
}
NTSTATUS NtQueryDefaultUILanguage(OUT LANGID *DefaultUILanguageId)
{
KPROCESSOR_MODE PreviousMode;
NTSTATUS Status;
PAGED_CODE();
Status = STATUS_SUCCESS;
try {
// Get previous processor mode and probe output argument if necessary.
PreviousMode = KeGetPreviousMode();
if (PreviousMode != KernelMode) {
ProbeForWriteUshort( (USHORT *)DefaultUILanguageId );
}
// Read the UI language from the current security context.
if (!NT_SUCCESS(ExpGetCurrentUserUILanguage( L"MultiUILanguageId", DefaultUILanguageId))) {
*DefaultUILanguageId = PsInstallUILanguageId;
}
}
except (EXCEPTION_EXECUTE_HANDLER) {
Status = GetExceptionCode();
}
return Status;
}
NTSTATUS ExpGetUILanguagePolicy(IN HANDLE CurrentUserKey, OUT LANGID *PolicyUILanguageId)
{
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes, MuiObjectAttributes;
UNICODE_STRING KeyPath, KeyValueName, MuiLanguagesKeyPath;
HANDLE Key, KeyMui;
WCHAR KeyValueBuffer[ 128 ];
PKEY_VALUE_PARTIAL_INFORMATION KeyValueInformation;
ULONG ResultLength;
ULONG Language;
PAGED_CODE();
// Let's verify that this is an MUI system first
RtlInitUnicodeString( &MuiLanguagesKeyPath, L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Nls\\MUILanguages" );
InitializeObjectAttributes( &MuiObjectAttributes, &MuiLanguagesKeyPath, (OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE), NULL, NULL);
Status = ZwOpenKey( &KeyMui, GENERIC_READ, &MuiObjectAttributes);
if (!NT_SUCCESS( Status )) {
return Status;
}
ZwClose( KeyMui );
KeyValueInformation = (PKEY_VALUE_PARTIAL_INFORMATION)KeyValueBuffer;
RtlInitUnicodeString( &KeyValueName, L"MultiUILanguageId" );
RtlInitUnicodeString( &KeyPath, L"Software\\Policies\\Microsoft\\Control Panel\\Desktop" );
InitializeObjectAttributes( &ObjectAttributes, &KeyPath, (OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE), CurrentUserKey, NULL);
// Check if there is a Policy key
Status = ZwOpenKey( &Key, GENERIC_READ, &ObjectAttributes);
if (NT_SUCCESS( Status )) {
Status = ZwQueryValueKey( Key, &KeyValueName, KeyValuePartialInformation, KeyValueInformation, sizeof( KeyValueBuffer ), &ResultLength);
if (NT_SUCCESS( Status )) {
if ((KeyValueInformation->DataLength > 2) && (KeyValueInformation->Type == REG_SZ)) {
RtlInitUnicodeString( &KeyValueName, (PWSTR) KeyValueInformation->Data );
Status = RtlUnicodeStringToInteger( &KeyValueName, (ULONG)16, &Language);
// Final check to make sure this is an MUI system
if (NT_SUCCESS( Status )) {
*PolicyUILanguageId = (LANGID)Language;
}
}
else {
Status = STATUS_UNSUCCESSFUL;
}
}
ZwClose( Key );
}
return Status;
}
NTSTATUS ExpSetCurrentUserUILanguage(IN WCHAR *ValueName, IN LANGID CurrentUserUILanguage)
{
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING KeyPath, KeyValueName, UILanguage;
HANDLE CurrentUserKey, Key;
WCHAR KeyValueBuffer[ 128 ];
PKEY_VALUE_PARTIAL_INFORMATION KeyValueInformation;
PWSTR s;
ULONG i, Digit;
WCHAR c;
PAGED_CODE();
if (CurrentUserUILanguage & 0xFFFF0000) {
return STATUS_INVALID_PARAMETER;
}
KeyValueInformation = (PKEY_VALUE_PARTIAL_INFORMATION)KeyValueBuffer;
Status = RtlOpenCurrentUser( MAXIMUM_ALLOWED, &CurrentUserKey );
if (!NT_SUCCESS( Status )) {
return Status;
}
RtlInitUnicodeString( &KeyValueName, ValueName );
RtlInitUnicodeString( &KeyPath, L"Control Panel\\Desktop" );
InitializeObjectAttributes( &ObjectAttributes, &KeyPath, (OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE), CurrentUserKey, NULL);
Status = ExpValidateLocale( MAKELCID( CurrentUserUILanguage, SORT_DEFAULT ) );
if (NT_SUCCESS(Status)) {
Status = ZwOpenKey( &Key, GENERIC_WRITE, &ObjectAttributes);
if (NT_SUCCESS( Status )) {
s = &KeyValueBuffer[ 8 ];
*s-- = UNICODE_NULL;
i = (ULONG)CurrentUserUILanguage;
while (s >= KeyValueBuffer) {
Digit = i & 0x0000000F;
if (Digit <= 9) {
*s-- = (WCHAR)(Digit + L'0');
}
else {
*s-- = (WCHAR)((Digit - 10) + L'A');
}
i = i >> 4;
}
Status = ZwSetValueKey( Key, &KeyValueName, 0, REG_SZ, KeyValueBuffer, 9 * sizeof( WCHAR ));
ZwClose( Key );
}
}
ZwClose( CurrentUserKey );
return Status;
}
NTSTATUS ExpGetCurrentUserUILanguage(IN WCHAR *ValueName, OUT LANGID *CurrentUserUILanguageId)
{
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING KeyPath, KeyValueName, UILanguage;
HANDLE CurrentUserKey, Key;
WCHAR KeyValueBuffer[ 128 ];
PKEY_VALUE_PARTIAL_INFORMATION KeyValueInformation;
ULONG ResultLength;
ULONG Digit;
PAGED_CODE();
KeyValueInformation = (PKEY_VALUE_PARTIAL_INFORMATION)KeyValueBuffer;
Status = RtlOpenCurrentUser( MAXIMUM_ALLOWED, &CurrentUserKey );
if (!NT_SUCCESS( Status )) {
return Status;
}
RtlInitUnicodeString( &KeyValueName, ValueName );
RtlInitUnicodeString( &KeyPath, L"Control Panel\\Desktop" );
InitializeObjectAttributes( &ObjectAttributes, &KeyPath, (OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE), CurrentUserKey, NULL);
// Let's check if there is a policy installed for the UI language, and if so, let's use it.
if (!NT_SUCCESS( ExpGetUILanguagePolicy( CurrentUserKey, CurrentUserUILanguageId ))) {
Status = ZwOpenKey( &Key, GENERIC_READ, &ObjectAttributes);
if (NT_SUCCESS( Status )) {
Status = ZwQueryValueKey( Key, &KeyValueName, KeyValuePartialInformation, KeyValueInformation, sizeof( KeyValueBuffer ), &ResultLength);
if (NT_SUCCESS( Status )) {
if (KeyValueInformation->Type == REG_SZ) {
RtlInitUnicodeString( &UILanguage, (PWSTR) KeyValueInformation->Data);
Status = RtlUnicodeStringToInteger( &UILanguage, (ULONG) 16, &Digit);
if (NT_SUCCESS( Status )) {
*CurrentUserUILanguageId = (LANGID) Digit;
}
}
else {
Status = STATUS_UNSUCCESSFUL;
}
}
ZwClose( Key );
}
}
ZwClose( CurrentUserKey );
return Status;
}
NTSTATUS NtSetDefaultUILanguage(IN LANGID DefaultUILanguageId)
{
NTSTATUS Status;
LANGID LangId;
// if this is called during user logon, then we need to update the user's registry.
if (DefaultUILanguageId == 0) {
Status = ExpGetCurrentUserUILanguage( L"MUILanguagePending" , &LangId );
if (NT_SUCCESS( Status )) {
Status = ExpSetCurrentUserUILanguage( L"MultiUILanguageId" , LangId);
}
return Status;
}
return ExpSetCurrentUserUILanguage( L"MUILanguagePending", DefaultUILanguageId );
}
NTSTATUS ExpValidateLocale(IN LCID LocaleId)
{
NTSTATUS Status = STATUS_INVALID_PARAMETER, ReturnStatus;
UNICODE_STRING LocaleName, KeyValueName;
UNICODE_STRING NlsLocaleKeyPath, NlsSortKeyPath, NlsLangGroupKeyPath;
WCHAR LocaleNameBuffer[ 32 ];
WCHAR KeyValueNameBuffer[ 32 ];
WCHAR KeyValueBuffer[ 128 ];
WCHAR *Ptr;
HANDLE LocaleKey, SortKey, LangGroupKey;
OBJECT_ATTRIBUTES NlsLocaleObjA, NlsSortObjA, NlsLangGroupObjA;
PKEY_VALUE_PARTIAL_INFORMATION KeyValueInformation;
ULONG i, ResultLength;
// Convert the LCID to the form %08x (e.g. 00000409)
LocaleName.Length = sizeof( LocaleNameBuffer ) / sizeof( WCHAR );
LocaleName.MaximumLength = LocaleName.Length;
LocaleName.Buffer = LocaleNameBuffer;
// Convert LCID to a string
ReturnStatus = RtlIntegerToUnicodeString( LocaleId, 16, &LocaleName );
if (!NT_SUCCESS(ReturnStatus))
goto Failed1;
Ptr = KeyValueNameBuffer;
for (i = ((LocaleName.Length)/sizeof(WCHAR));
i < 8;
i++, Ptr++) {
*Ptr = L'0';
}
*Ptr = UNICODE_NULL;
RtlInitUnicodeString(&KeyValueName, KeyValueNameBuffer);
KeyValueName.MaximumLength = sizeof( KeyValueNameBuffer ) / sizeof( WCHAR );
RtlAppendUnicodeToString(&KeyValueName, LocaleName.Buffer);
// Open Registry Keys : Locale, Sort and LanguageGroup
RtlInitUnicodeString(&NlsLocaleKeyPath, L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Nls\\Locale");
InitializeObjectAttributes( &NlsLocaleObjA, &NlsLocaleKeyPath, (OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE), NULL, NULL);
ReturnStatus = ZwOpenKey( &LocaleKey, GENERIC_READ, &NlsLocaleObjA);
if (!NT_SUCCESS(ReturnStatus))
goto Failed1;
RtlInitUnicodeString(&NlsSortKeyPath, L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Nls\\Locale\\Alternate Sorts");
InitializeObjectAttributes( &NlsSortObjA, &NlsSortKeyPath, (OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE), NULL, NULL);
ReturnStatus = ZwOpenKey( &SortKey, GENERIC_READ, &NlsSortObjA );
if (!NT_SUCCESS(ReturnStatus))
goto Failed2;
RtlInitUnicodeString(&NlsLangGroupKeyPath, L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Nls\\Language Groups");
InitializeObjectAttributes( &NlsLangGroupObjA, &NlsLangGroupKeyPath, (OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE), NULL, NULL);
ReturnStatus = ZwOpenKey( &LangGroupKey, GENERIC_READ, &NlsLangGroupObjA);
if (!NT_SUCCESS(ReturnStatus))
goto Failed3;
// Validate Locale : Lookup the Locale's Language group, and make sure it is there.
KeyValueInformation = (PKEY_VALUE_PARTIAL_INFORMATION) KeyValueBuffer;
ReturnStatus = ZwQueryValueKey( LocaleKey, &KeyValueName, KeyValuePartialInformation, KeyValueInformation, sizeof( KeyValueBuffer ), &ResultLength);
if (!NT_SUCCESS(ReturnStatus)) {
ReturnStatus = ZwQueryValueKey( SortKey, &KeyValueName, KeyValuePartialInformation, KeyValueInformation, sizeof( KeyValueBuffer ), &ResultLength);
}
if ((NT_SUCCESS(ReturnStatus)) && (KeyValueInformation->DataLength > 2)
) {
RtlInitUnicodeString( &KeyValueName, (PWSTR) KeyValueInformation->Data );
ReturnStatus = ZwQueryValueKey( LangGroupKey, &KeyValueName, KeyValuePartialInformation, KeyValueInformation, sizeof( KeyValueBuffer ), &ResultLength);
if ((NT_SUCCESS(ReturnStatus)) && (KeyValueInformation->Type == REG_SZ) && (KeyValueInformation->DataLength > 2)) {
Ptr = (PWSTR) KeyValueInformation->Data;
if (Ptr[0] == L'1' && Ptr[1] == UNICODE_NULL) {
Status = STATUS_SUCCESS;
}
}
}
// Close opened keys
ZwClose( LangGroupKey );
Failed3:
ZwClose( SortKey );
Failed2:
ZwClose( LocaleKey );
Failed1:
if (!NT_SUCCESS(ReturnStatus)) {// If an error happens, let's record it.
Status = ReturnStatus;
}
return Status;
}
NTSTATUS NtQuerySystemInformation (IN SYSTEM_INFORMATION_CLASS SystemInformationClass, OUT PVOID SystemInformation, IN ULONG SystemInformationLength, OUT PULONG ReturnLength OPTIONAL)
/*++
Routine Description:
This function queries information about the system.
Arguments:
SystemInformationClass - The system information class about which to retrieve information.
SystemInformation - A pointer to a buffer which receives the specified information.
The format and content of the buffer depend on the specified system information class.
SystemInformation Format by Information Class:
SystemBasicInformation - Data type is SYSTEM_BASIC_INFORMATION
SYSTEM_BASIC_INFORMATION Structure
ULONG Reserved - Always zero.
ULONG TimerResolutionInMicroSeconds - The resolution of the hardware time.
All time values in NT are specified as 64-bit LARGE_INTEGER values in units of 100 nanoseconds.
This field allows an application to understand how many of the low order bits of a system time value are insignificant.
ULONG PageSize - The physical page size for virtual memory objects.
Physical memory is committed in PageSize chunks.
ULONG AllocationGranularity - The logical page size for virtual memory objects.
Allocating 1 byte of virtual memory will actually allocate AllocationGranularity bytes of virtual memory.
Storing into that byte will commit the first physical page of the virtual memory.
ULONG MinimumUserModeAddress - The smallest valid user mode address.
The first AllocationGranularity bytes of the virtual address space are reserved.
This forces access violations for code the dereferences a zero pointer.
ULONG MaximumUserModeAddress - The largest valid user mode address.
The next AllocationGranularity bytes of the virtual address space are reserved.
This allows system service routines to validate user mode pointer parameters quickly.
KAFFINITY ActiveProcessorsAffinityMask - The affinity mask for the current hardware configuration.
CCHAR NumberOfProcessors - The number of processors in the current hardware configuration.
SystemProcessorInformation - Data type is SYSTEM_PROCESSOR_INFORMATION
SYSTEM_PROCESSOR_INFORMATION Structure
USHORT ProcessorArchitecture - The processor architecture:
PROCESSOR_ARCHITECTURE_INTEL
PROCESSOR_ARCHITECTURE_MIPS
PROCESSOR_ARCHITECTURE_ALPHA
PROCESSOR_ARCHITECTURE_PPC
USHORT ProcessorLevel - architecture dependent processor level.
This is the least common denominator for an MP system:
For PROCESSOR_ARCHITECTURE_INTEL:
3 - 386
4 - 486
5 - 586 or Pentium
For PROCESSOR_ARCHITECTURE_MIPS:
00xx - where xx is 8-bit implementation number (bits 8-15 of
PRId register.
0004 - R4000
For PROCESSOR_ARCHITECTURE_ALPHA:
xxxx - where xxxx is 16-bit processor version number (low order 16 bits of processor version number from firmware)
21064 - 21064
21066 - 21066
21164 - 21164
For PROCESSOR_ARCHITECTURE_PPC:
xxxx - where xxxx is 16-bit processor version number (high order 16 bits of Processor Version Register).
1 - 601
3 - 603
4 - 604
6 - 603+
9 - 604+
20 - 620
USHORT ProcessorRevision - architecture dependent processor revision.
This is the least common denominator for an MP system:
For PROCESSOR_ARCHITECTURE_INTEL:
For Old Intel 386 or 486:
FFxx - where xx is displayed as a hexadecimal CPU stepping
(e.g. FFD0 is D0 stepping)
For Intel Pentium or Cyrix/NexGen 486
xxyy - where xx is model number and yy is stepping, so
0201 is Model 2, Stepping 1
For PROCESSOR_ARCHITECTURE_MIPS:
00xx is 8-bit revision number of processor (low order 8 bits
of PRId Register
For PROCESSOR_ARCHITECTURE_ALPHA:
xxyy - where xxyy is 16-bit processor revision number (low order 16 bits of processor revision number from firmware).
Displayed as Model 'A'+xx, Pass yy
For PROCESSOR_ARCHITECTURE_PPC:
xxyy - where xxyy is 16-bit processor revision number (low order 16 bits of Processor Version Register). Displayed as a fixed point number xx.yy
USHORT Reserved - Always zero.
ULONG ProcessorFeatureBits - architecture dependent processor feature bits.
This is the least common denominator for an MP system.
SystemPerformanceInformation - Data type is SYSTEM_PERFORMANCE_INFORMATION
SYSTEM_PERFORMANCE_INFORMATION Structure
LARGE_INTEGER IdleProcessTime - Returns the kernel time of the idle process.
BUGBUG complete comment.
LARGE_INTEGER IoReadTransferCount;
LARGE_INTEGER IoWriteTransferCount;
LARGE_INTEGER IoOtherTransferCount;
LARGE_INTEGER KernelTime;
LARGE_INTEGER UserTime;
ULONG IoReadOperationCount;
ULONG IoWriteOperationCount;
ULONG IoOtherOperationCount;
ULONG AvailablePages;
ULONG CommittedPages;
ULONG PageFaultCount;
ULONG CopyOnWriteCount;
ULONG TransitionCount;
ULONG CacheTransitionCount;
ULONG DemandZeroCount;
ULONG PageReadCount;
ULONG PageReadIoCount;
ULONG CacheReadCount;
ULONG CacheIoCount;
ULONG DirtyPagesWriteCount;
ULONG DirtyWriteIoCount;
ULONG MappedPagesWriteCount;
ULONG MappedWriteIoCount;
ULONG PagedPoolPages;
ULONG NonPagedPoolPages;
ULONG PagedPoolAllocs;
ULONG PagedPoolFrees;
ULONG NonPagedPoolAllocs;
ULONG NonPagedPoolFrees;
ULONG LpcThreadsWaitingInReceive;
ULONG LpcThreadsWaitingForReply;
SystemProcessInformation - Data type is SYSTEM_PROCESS_INFORMATION
SYSTEM_PROCESSOR_INFORMATION Structure
BUGBUG - add here when done.
SystemDockInformation - Data type is SYSTEM_DOCK_INFORMATION
SYSTEM_DOCK_INFORMATION Structure
SYSTEM_DOCKED_STATE DockState - Ordinal specifying the current docking state. Possible values:
SystemDockStateUnknown - The docking state of the system could not be determined.
SystemUndocked - The system is undocked.
SystemDocked - The system is docked.
ULONG DockIdLength - Specifies the length in characters of the Dock ID string
(not including terminating NULL).
ULONG SerialNumberOffset - Specifies the character offset of the Serial Number within the DockId buffer.
ULONG SerialNumberLength - Specifies the length in characters of the Serial Number string (not including terminating NULL).
WCHAR DockId - Character buffer containing two null-terminated strings. The first string is a character representation of the dock ID number, starting at the beginning of the buffer.
The second string is a character representation of the machine's serial number, starting at character offset SerialNumberOffset in the buffer.
SystemPowerSettings - Data type is SYSTEM_POWER_SETTINGS
SYSTEM_POWER_INFORMATION Structure
BOOLEAN SystemSuspendSupported - Supplies a BOOLEAN as to whether the system suspend is enabled or not.
BOOLEAN SystemHibernateSupported - Supplies a BOOLEAN as to whether the system hibernate is enabled or not.
BOOLEAN ResumeTimerSupportsSuspend - Supplies a BOOLEAN as to whether the resuming from an external programmed timer from within a system suspend is enabled or not.
BOOLEAN ResumeTimerSupportsHibernate - Supplies a BOOLEAN as to whether or resuming from an external programmed timer from within a system hibernate is enabled or not.
BOOLEAN LidSupported - Supplies a BOOLEAN as to whether or not the suspending and resuming by Lid are enabled or not.
BOOLEAN TurboSettingSupported - Supplies a BOOLEAN as to whether or not the system supports a turbo mode setting.
BOOLEAN TurboMode - Supplies a BOOLEAN as to whether or not the system is in turbo mode.
BOOLEAN SystemAcOrDc - Supplies a BOOLEAN as to whether or not the system is in AC mode.
BOOLEAN DisablePowerDown - If TRUE, signifies that all requests to PoRequestPowerChange for a SET_POWER-PowerDown irp are to be ignored.
LARGE_INTEGER SpindownDrives - If non-zero, signifies to the cache manager (or the IO subsystem) to optimize drive
accesses based upon power saves, are that drives are to be spun down as appropriate. The value represents to user's requested disk spin down timeout.
SystemProcessorSpeedInformation - Data type is SYSTEM_PROCESSOR_SPEED_INFORMATION
SYSTEM_PROCESSOR_SPEED_INFORMATION Structure (same as HalProcessorSpeedInformation)
ULONG MaximumProcessorSpeed - The maximum hertz the processor is capable of.
This information is used by the UI to draw the appropriate scale. This field is read-only and cannot be set.
ULONG CurrentAvailableSpeed - The hertz for which the processor runs at when not idle.
This field is read-only and cannot be set.
ULONG ConfiguredSpeedLimit - The hertz for which the processor is limited to due to the current configuration.
UCHAR PowerState
0 - Normal
1 - The processor speed is being limited due to available power restrictions. This field id read-only by the system.
UCHAR ThermalState
0 - Normal
1 - The processors speed is being limited due to thermal restrictions. This field is read-only by the system.
UCHAR TurboState
0 - Normal
1 - The processors speed is being limited by the fact that the system turbo mode is currently disabled which is requested to obtain more processor speed.
SystemInformationLength - Specifies the length in bytes of the system information buffer.
ReturnLength - An optional pointer which, if specified, receives the number of bytes placed in the system information buffer.
Return Value:
Returns one of the following status codes:
STATUS_SUCCESS - normal, successful completion.
STATUS_INVALID_INFO_CLASS - The SystemInformationClass parameter did not specify a valid value.
STATUS_INFO_LENGTH_MISMATCH - The value of the SystemInformationLength parameter did not match the length required for the information class requested by the SystemInformationClass parameter.
STATUS_ACCESS_VIOLATION - Either the SystemInformation buffer pointer or the ReturnLength pointer value specified an invalid address.
STATUS_WORKING_SET_QUOTA - The process does not have sufficient working set to lock the specified output structure in memory.
STATUS_INSUFFICIENT_RESOURCES - Insufficient system resources exist for this request to complete.
--*/
{
KPROCESSOR_MODE PreviousMode;
PSYSTEM_BASIC_INFORMATION BasicInfo;
PSYSTEM_PROCESSOR_INFORMATION ProcessorInfo;
SYSTEM_TIMEOFDAY_INFORMATION LocalTimeOfDayInfo;
SYSTEM_PERFORMANCE_INFORMATION LocalPerformanceInfo;
PSYSTEM_PERFORMANCE_INFORMATION PerformanceInfo;
PSYSTEM_PROCESSOR_PERFORMANCE_INFORMATION ProcessorPerformanceInfo;
PSYSTEM_CALL_COUNT_INFORMATION CallCountInformation;
PSYSTEM_DEVICE_INFORMATION DeviceInformation;
PCONFIGURATION_INFORMATION ConfigInfo;
PSYSTEM_EXCEPTION_INFORMATION ExceptionInformation;
PSYSTEM_FILECACHE_INFORMATION FileCache;
PSYSTEM_QUERY_TIME_ADJUST_INFORMATION TimeAdjustmentInformation;
PSYSTEM_KERNEL_DEBUGGER_INFORMATION KernelDebuggerInformation;
PSYSTEM_CONTEXT_SWITCH_INFORMATION ContextSwitchInformation;
PSYSTEM_INTERRUPT_INFORMATION InterruptInformation;
PSYSTEM_SESSION_PROCESS_INFORMATION SessionProcessInformation;
PVOID ProcessInformation;
ULONG ProcessInformationLength;
NTSTATUS Status;
BOOLEAN ReleaseModuleResoure = FALSE;
PKPRCB Prcb;
ULONG Length = 0;
ULONG i;
ULONG ContextSwitches;
PULONG TableLimit, TableCounts;
PKSERVICE_TABLE_DESCRIPTOR Table;
ULONG SessionId;
PAGED_CODE();
// Assume successful completion.
Status = STATUS_SUCCESS;
try {
// Get previous processor mode and probe output argument if necessary.
PreviousMode = KeGetPreviousMode();
if (PreviousMode != KernelMode) {
ProbeForWrite(SystemInformation,SystemInformationLength,SystemInformationClass == SystemKernelDebuggerInformation ? sizeof(BOOLEAN): sizeof(ULONG));
if (ARGUMENT_PRESENT(ReturnLength)) {
ProbeForWriteUlong(ReturnLength);
}
}
if (ARGUMENT_PRESENT(ReturnLength)) {
*ReturnLength = 0;
}
switch (SystemInformationClass) {
case SystemBasicInformation:
if (SystemInformationLength != sizeof( SYSTEM_BASIC_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
BasicInfo = (PSYSTEM_BASIC_INFORMATION)SystemInformation;
BasicInfo->NumberOfProcessors = KeNumberProcessors;
BasicInfo->ActiveProcessorsAffinityMask = (ULONG_PTR)KeActiveProcessors;
BasicInfo->Reserved = 0;
BasicInfo->TimerResolution = KeMaximumIncrement;
BasicInfo->NumberOfPhysicalPages = MmNumberOfPhysicalPages;
BasicInfo->LowestPhysicalPageNumber = MmLowestPhysicalPage;
BasicInfo->HighestPhysicalPageNumber = MmHighestPhysicalPage;
BasicInfo->PageSize = PAGE_SIZE;
BasicInfo->AllocationGranularity = MM_ALLOCATION_GRANULARITY;
BasicInfo->MinimumUserModeAddress = (ULONG_PTR)MM_LOWEST_USER_ADDRESS;
BasicInfo->MaximumUserModeAddress = (ULONG_PTR)MM_HIGHEST_USER_ADDRESS;
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = sizeof( SYSTEM_BASIC_INFORMATION );
}
break;
case SystemProcessorInformation:
if (SystemInformationLength < sizeof( SYSTEM_PROCESSOR_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
ProcessorInfo = (PSYSTEM_PROCESSOR_INFORMATION)SystemInformation;
ProcessorInfo->ProcessorArchitecture = KeProcessorArchitecture;
ProcessorInfo->ProcessorLevel = KeProcessorLevel;
ProcessorInfo->ProcessorRevision = KeProcessorRevision;
ProcessorInfo->Reserved = 0;
ProcessorInfo->ProcessorFeatureBits = KeFeatureBits;
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = sizeof( SYSTEM_PROCESSOR_INFORMATION );
}
break;
case SystemPerformanceInformation:
if (SystemInformationLength < sizeof( SYSTEM_PERFORMANCE_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
PerformanceInfo = (PSYSTEM_PERFORMANCE_INFORMATION)SystemInformation;
// Io information.
LocalPerformanceInfo.IoReadTransferCount = IoReadTransferCount;
LocalPerformanceInfo.IoWriteTransferCount = IoWriteTransferCount;
LocalPerformanceInfo.IoOtherTransferCount = IoOtherTransferCount;
LocalPerformanceInfo.IoReadOperationCount = IoReadOperationCount;
LocalPerformanceInfo.IoWriteOperationCount = IoWriteOperationCount;
LocalPerformanceInfo.IoOtherOperationCount = IoOtherOperationCount;
// Ke information.
// These counters are kept on a per processor basis and must be totaled.
{
ULONG FirstLevelTbFills = 0;
ULONG SecondLevelTbFills = 0;
ULONG SystemCalls = 0;
// ULONG InterruptCount = 0;
ContextSwitches = 0;
for (i = 0; i < (ULONG)KeNumberProcessors; i += 1) {
Prcb = KiProcessorBlock[i];
if (Prcb != NULL) {
ContextSwitches += Prcb->KeContextSwitches;
FirstLevelTbFills += Prcb->KeFirstLevelTbFills;
// InterruptCount += Prcb->KeInterruptCount;
SecondLevelTbFills += Prcb->KeSecondLevelTbFills;
SystemCalls += Prcb->KeSystemCalls;
}
}
LocalPerformanceInfo.ContextSwitches = ContextSwitches;
LocalPerformanceInfo.FirstLevelTbFills = FirstLevelTbFills;
// LocalPerformanceInfo.InterruptCount = KeInterruptCount;
LocalPerformanceInfo.SecondLevelTbFills = SecondLevelTbFills;
LocalPerformanceInfo.SystemCalls = SystemCalls;
}
// Mm information.
LocalPerformanceInfo.AvailablePages = MmAvailablePages;
LocalPerformanceInfo.CommittedPages = MmTotalCommittedPages;
LocalPerformanceInfo.CommitLimit = MmTotalCommitLimit;
LocalPerformanceInfo.PeakCommitment = MmPeakCommitment;
LocalPerformanceInfo.PageFaultCount = MmInfoCounters.PageFaultCount;
LocalPerformanceInfo.CopyOnWriteCount = MmInfoCounters.CopyOnWriteCount;
LocalPerformanceInfo.TransitionCount = MmInfoCounters.TransitionCount;
LocalPerformanceInfo.CacheTransitionCount = MmInfoCounters.CacheTransitionCount;
LocalPerformanceInfo.DemandZeroCount = MmInfoCounters.DemandZeroCount;
LocalPerformanceInfo.PageReadCount = MmInfoCounters.PageReadCount;
LocalPerformanceInfo.PageReadIoCount = MmInfoCounters.PageReadIoCount;
LocalPerformanceInfo.CacheReadCount = MmInfoCounters.CacheReadCount;
LocalPerformanceInfo.CacheIoCount = MmInfoCounters.CacheIoCount;
LocalPerformanceInfo.DirtyPagesWriteCount = MmInfoCounters.DirtyPagesWriteCount;
LocalPerformanceInfo.DirtyWriteIoCount = MmInfoCounters.DirtyWriteIoCount;
LocalPerformanceInfo.MappedPagesWriteCount = MmInfoCounters.MappedPagesWriteCount;
LocalPerformanceInfo.MappedWriteIoCount = MmInfoCounters.MappedWriteIoCount;
LocalPerformanceInfo.FreeSystemPtes = MmTotalFreeSystemPtes[0];
LocalPerformanceInfo.ResidentSystemCodePage = MmSystemCodePage;
LocalPerformanceInfo.ResidentSystemCachePage = MmSystemCachePage;
LocalPerformanceInfo.ResidentPagedPoolPage = MmPagedPoolPage;
LocalPerformanceInfo.ResidentSystemDriverPage = MmSystemDriverPage;
LocalPerformanceInfo.TotalSystemCodePages = MmTotalSystemCodePages;
LocalPerformanceInfo.TotalSystemDriverPages = MmTotalSystemDriverPages;
// Process information.
LocalPerformanceInfo.IdleProcessTime.QuadPart = UInt32x32To64(PsIdleProcess->Pcb.KernelTime, KeMaximumIncrement);
// Pool information.
LocalPerformanceInfo.PagedPoolPages = 0;
LocalPerformanceInfo.NonPagedPoolPages = 0;
LocalPerformanceInfo.PagedPoolAllocs = 0;
LocalPerformanceInfo.PagedPoolFrees = 0;
LocalPerformanceInfo.PagedPoolLookasideHits = 0;
LocalPerformanceInfo.NonPagedPoolAllocs = 0;
LocalPerformanceInfo.NonPagedPoolFrees = 0;
LocalPerformanceInfo.NonPagedPoolLookasideHits = 0;
ExQueryPoolUsage( &LocalPerformanceInfo.PagedPoolPages,
&LocalPerformanceInfo.NonPagedPoolPages,
&LocalPerformanceInfo.PagedPoolAllocs,
&LocalPerformanceInfo.PagedPoolFrees,
&LocalPerformanceInfo.PagedPoolLookasideHits,
&LocalPerformanceInfo.NonPagedPoolAllocs,
&LocalPerformanceInfo.NonPagedPoolFrees,
&LocalPerformanceInfo.NonPagedPoolLookasideHits
);
// Cache Manager information.
LocalPerformanceInfo.CcFastReadNoWait = CcFastReadNoWait;
LocalPerformanceInfo.CcFastReadWait = CcFastReadWait;
LocalPerformanceInfo.CcFastReadResourceMiss = CcFastReadResourceMiss;
LocalPerformanceInfo.CcFastReadNotPossible = CcFastReadNotPossible;
LocalPerformanceInfo.CcFastMdlReadNoWait = CcFastMdlReadNoWait;
LocalPerformanceInfo.CcFastMdlReadWait = CcFastMdlReadWait;
LocalPerformanceInfo.CcFastMdlReadResourceMiss = CcFastMdlReadResourceMiss;
LocalPerformanceInfo.CcFastMdlReadNotPossible = CcFastMdlReadNotPossible;
LocalPerformanceInfo.CcMapDataNoWait = CcMapDataNoWait;
LocalPerformanceInfo.CcMapDataWait = CcMapDataWait;
LocalPerformanceInfo.CcMapDataNoWaitMiss = CcMapDataNoWaitMiss;
LocalPerformanceInfo.CcMapDataWaitMiss = CcMapDataWaitMiss;
LocalPerformanceInfo.CcPinMappedDataCount = CcPinMappedDataCount;
LocalPerformanceInfo.CcPinReadNoWait = CcPinReadNoWait;
LocalPerformanceInfo.CcPinReadWait = CcPinReadWait;
LocalPerformanceInfo.CcPinReadNoWaitMiss = CcPinReadNoWaitMiss;
LocalPerformanceInfo.CcPinReadWaitMiss = CcPinReadWaitMiss;
LocalPerformanceInfo.CcCopyReadNoWait = CcCopyReadNoWait;
LocalPerformanceInfo.CcCopyReadWait = CcCopyReadWait;
LocalPerformanceInfo.CcCopyReadNoWaitMiss = CcCopyReadNoWaitMiss;
LocalPerformanceInfo.CcCopyReadWaitMiss = CcCopyReadWaitMiss;
LocalPerformanceInfo.CcMdlReadNoWait = CcMdlReadNoWait;
LocalPerformanceInfo.CcMdlReadWait = CcMdlReadWait;
LocalPerformanceInfo.CcMdlReadNoWaitMiss = CcMdlReadNoWaitMiss;
LocalPerformanceInfo.CcMdlReadWaitMiss = CcMdlReadWaitMiss;
LocalPerformanceInfo.CcReadAheadIos = CcReadAheadIos;
LocalPerformanceInfo.CcLazyWriteIos = CcLazyWriteIos;
LocalPerformanceInfo.CcLazyWritePages = CcLazyWritePages;
LocalPerformanceInfo.CcDataFlushes = CcDataFlushes;
LocalPerformanceInfo.CcDataPages = CcDataPages;
#if !defined(NT_UP)
// On an MP machines go sum up some other 'hot' cache manager statistics.
for (i = 0; i < (ULONG)KeNumberProcessors; i++) {
Prcb = KiProcessorBlock[i];
LocalPerformanceInfo.CcFastReadNoWait += Prcb->CcFastReadNoWait;
LocalPerformanceInfo.CcFastReadWait += Prcb->CcFastReadWait;
LocalPerformanceInfo.CcFastReadNotPossible += Prcb->CcFastReadNotPossible;
LocalPerformanceInfo.CcCopyReadNoWait += Prcb->CcCopyReadNoWait;
LocalPerformanceInfo.CcCopyReadWait += Prcb->CcCopyReadWait;
LocalPerformanceInfo.CcCopyReadNoWaitMiss += Prcb->CcCopyReadNoWaitMiss;
}
#endif
*PerformanceInfo = LocalPerformanceInfo;
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = sizeof(LocalPerformanceInfo);
}
break;
case SystemProcessorPerformanceInformation:
if (SystemInformationLength <
sizeof( SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
ProcessorPerformanceInfo = (PSYSTEM_PROCESSOR_PERFORMANCE_INFORMATION) SystemInformation;
Length = 0;
for (i = 0; i < (ULONG)KeNumberProcessors; i++) {
Prcb = KiProcessorBlock[i];
if (Prcb != NULL) {
if (SystemInformationLength < Length + sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION))
break;
Length += sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION);
ProcessorPerformanceInfo->UserTime.QuadPart = UInt32x32To64(Prcb->UserTime, KeMaximumIncrement);
ProcessorPerformanceInfo->KernelTime.QuadPart = UInt32x32To64(Prcb->KernelTime, KeMaximumIncrement);
ProcessorPerformanceInfo->DpcTime.QuadPart = UInt32x32To64(Prcb->DpcTime, KeMaximumIncrement);
ProcessorPerformanceInfo->InterruptTime.QuadPart = UInt32x32To64(Prcb->InterruptTime, KeMaximumIncrement);
ProcessorPerformanceInfo->IdleTime.QuadPart = UInt32x32To64(Prcb->IdleThread->KernelTime, KeMaximumIncrement);
ProcessorPerformanceInfo->InterruptCount = Prcb->InterruptCount;
ProcessorPerformanceInfo++;
}
}
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = Length;
}
break;
case SystemTimeOfDayInformation:
if (SystemInformationLength > sizeof (SYSTEM_TIMEOFDAY_INFORMATION)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
RtlZeroMemory (&LocalTimeOfDayInfo, sizeof(LocalTimeOfDayInfo));
KeQuerySystemTime(&LocalTimeOfDayInfo.CurrentTime);
LocalTimeOfDayInfo.BootTime = KeBootTime;
LocalTimeOfDayInfo.TimeZoneBias = ExpTimeZoneBias;
LocalTimeOfDayInfo.TimeZoneId = ExpCurrentTimeZoneId;
LocalTimeOfDayInfo.BootTimeBias = KeBootTimeBias;
LocalTimeOfDayInfo.SleepTimeBias = KeInterruptTimeBias;
try {
RtlCopyMemory (SystemInformation,&LocalTimeOfDayInfo,SystemInformationLength);
if (ARGUMENT_PRESENT(ReturnLength) ) {
*ReturnLength = SystemInformationLength;
}
} except(EXCEPTION_EXECUTE_HANDLER) {
return STATUS_SUCCESS;
}
break;
// Query system time adjustment information.
case SystemTimeAdjustmentInformation:
if (SystemInformationLength != sizeof( SYSTEM_QUERY_TIME_ADJUST_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
TimeAdjustmentInformation = (PSYSTEM_QUERY_TIME_ADJUST_INFORMATION)SystemInformation;
TimeAdjustmentInformation->TimeAdjustment = KeTimeAdjustment;
TimeAdjustmentInformation->TimeIncrement = KeMaximumIncrement;
TimeAdjustmentInformation->Enable = KeTimeSynchronization;
break;
case SystemSummaryMemoryInformation:
case SystemFullMemoryInformation:
if (SystemInformationLength < sizeof( SYSTEM_MEMORY_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = MmMemoryUsage (SystemInformation, SystemInformationLength, (SystemInformationClass == SystemFullMemoryInformation) ? 0 : 1, &Length);
if (NT_SUCCESS(Status) && ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = Length;
}
break;
case SystemPathInformation:
DbgPrint( "EX: SystemPathInformation now available via SharedUserData\n" );
DbgBreakPoint();
return STATUS_NOT_IMPLEMENTED;
break;
case SystemProcessInformation:
if (SystemInformationLength < sizeof(SYSTEM_PROCESS_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = ExpGetProcessInformation(SystemInformation, SystemInformationLength, &Length, NULL);
if (NT_SUCCESS(Status) && ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemSessionProcessInformation:
if (SystemInformationLength < sizeof(SYSTEM_SESSION_PROCESS_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
SessionProcessInformation = (PSYSTEM_SESSION_PROCESS_INFORMATION)SystemInformation;
// The lower level locks the buffer specified below into memory using MmProbeAndLockPages.
// We don't need to probe the buffers here.
SessionId = SessionProcessInformation->SessionId;
ProcessInformation = SessionProcessInformation->Buffer;
ProcessInformationLength = SessionProcessInformation->SizeOfBuf;
if (ProcessInformationLength < sizeof(SYSTEM_PROCESS_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
if (!POINTER_IS_ALIGNED(ProcessInformation, sizeof(ULONG)))
{
return STATUS_DATATYPE_MISALIGNMENT;
}
Status = ExpGetProcessInformation(ProcessInformation, ProcessInformationLength, &Length, &SessionId);
if (NT_SUCCESS(Status) && ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemCallCountInformation:
Length = sizeof(SYSTEM_CALL_COUNT_INFORMATION) + (NUMBER_SERVICE_TABLES * sizeof(ULONG));
for ( i = 0, Table = KeServiceDescriptorTableShadow; i < NUMBER_SERVICE_TABLES; i++, Table++ ) {
if ( (Table->Limit != 0) && (Table->Count != NULL) ) {
Length += Table->Limit * sizeof(ULONG);
}
}
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = Length;
}
if (SystemInformationLength < Length) {
return STATUS_INFO_LENGTH_MISMATCH;
}
CallCountInformation = (PSYSTEM_CALL_COUNT_INFORMATION)SystemInformation;
CallCountInformation->Length = Length;
CallCountInformation->NumberOfTables = NUMBER_SERVICE_TABLES;
TableLimit = (PULONG)(CallCountInformation + 1);
TableCounts = TableLimit + NUMBER_SERVICE_TABLES;
for ( i = 0, Table = KeServiceDescriptorTableShadow; i < NUMBER_SERVICE_TABLES; i++, Table++ ) {
if ((Table->Limit == 0) || (Table->Count == NULL)) {
*TableLimit++ = 0;
} else {
*TableLimit++ = Table->Limit;
RtlMoveMemory((PVOID)TableCounts, (PVOID)Table->Count, Table->Limit * sizeof(ULONG));
TableCounts += Table->Limit;
}
}
break;
case SystemDeviceInformation:
if (SystemInformationLength != sizeof( SYSTEM_DEVICE_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
ConfigInfo = IoGetConfigurationInformation();
DeviceInformation = (PSYSTEM_DEVICE_INFORMATION)SystemInformation;
DeviceInformation->NumberOfDisks = ConfigInfo->DiskCount;
DeviceInformation->NumberOfFloppies = ConfigInfo->FloppyCount;
DeviceInformation->NumberOfCdRoms = ConfigInfo->CdRomCount;
DeviceInformation->NumberOfTapes = ConfigInfo->TapeCount;
DeviceInformation->NumberOfSerialPorts = ConfigInfo->SerialCount;
DeviceInformation->NumberOfParallelPorts = ConfigInfo->ParallelCount;
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = sizeof(SYSTEM_DEVICE_INFORMATION);
}
break;
case SystemFlagsInformation:
if (SystemInformationLength != sizeof(SYSTEM_FLAGS_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
((PSYSTEM_FLAGS_INFORMATION) SystemInformation)->Flags = NtGlobalFlag;
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = sizeof(SYSTEM_FLAGS_INFORMATION);
}
break;
case SystemCallTimeInformation:
return STATUS_NOT_IMPLEMENTED;
case SystemModuleInformation:
KeEnterCriticalRegion();
ExAcquireResourceExclusive( &PsLoadedModuleResource, TRUE );
ReleaseModuleResoure = TRUE;
Status = ExpQueryModuleInformation( &PsLoadedModuleList,&MmLoadedUserImageList,(PRTL_PROCESS_MODULES)SystemInformation,SystemInformationLength,ReturnLength);
ExReleaseResource (&PsLoadedModuleResource);
ReleaseModuleResoure = FALSE;
KeLeaveCriticalRegion();
break;
case SystemLocksInformation:
if (SystemInformationLength < sizeof(RTL_PROCESS_LOCKS))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = ExpGetLockInformation(SystemInformation, SystemInformationLength, &Length);
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemStackTraceInformation:
if (SystemInformationLength < sizeof(RTL_PROCESS_BACKTRACES))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
#if i386 && !FPO
Status = ExpGetStackTraceInformation (SystemInformation,SystemInformationLength,&Length);
#else
Status = STATUS_NOT_IMPLEMENTED;
#endif // i386 && !FPO
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemPagedPoolInformation:
if (SystemInformationLength < sizeof(SYSTEM_POOL_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = ExpGetPoolInformation(PagedPool, SystemInformation, SystemInformationLength, &Length);
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemNonPagedPoolInformation:
if (SystemInformationLength < sizeof(SYSTEM_POOL_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = ExpGetPoolInformation(NonPagedPool, SystemInformation, SystemInformationLength, &Length);
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemHandleInformation:
if (SystemInformationLength < sizeof(SYSTEM_HANDLE_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = ExpGetHandleInformation(SystemInformation, SystemInformationLength, &Length);
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemObjectInformation:
if (SystemInformationLength < sizeof(SYSTEM_OBJECTTYPE_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = ExpGetObjectInformation(SystemInformation, SystemInformationLength, &Length);
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemPageFileInformation:
if (SystemInformationLength < sizeof(SYSTEM_PAGEFILE_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = MmGetPageFileInformation(SystemInformation, SystemInformationLength, &Length);
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = Length;
}
break;
case SystemFileCacheInformation:
// This structure was extended in NT 4.0 from 12 bytes.
// Use the previous size of 12 bytes for versioning info.
if (SystemInformationLength < 12)
{
return STATUS_INFO_LENGTH_MISMATCH;
}
FileCache = (PSYSTEM_FILECACHE_INFORMATION)SystemInformation;
FileCache->CurrentSize = MmSystemCacheWs.WorkingSetSize << PAGE_SHIFT;
FileCache->PeakSize = MmSystemCacheWs.PeakWorkingSetSize << PAGE_SHIFT;
FileCache->CurrentSizeIncludingTransitionInPages = MmSystemCacheWs.WorkingSetSize + MmTransitionSharedPages;
FileCache->PeakSizeIncludingTransitionInPages = MmTransitionSharedPagesPeak;
FileCache->PageFaultCount = MmSystemCacheWs.PageFaultCount;
i = 12;
if (SystemInformationLength >= sizeof(SYSTEM_FILECACHE_INFORMATION))
{
i = sizeof(SYSTEM_FILECACHE_INFORMATION);
FileCache->MinimumWorkingSet = MmSystemCacheWs.MinimumWorkingSetSize;
FileCache->MaximumWorkingSet = MmSystemCacheWs.MaximumWorkingSetSize;
}
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = i;
}
break;
case SystemPoolTagInformation:
#ifdef POOL_TAGGING
if (SystemInformationLength < sizeof(SYSTEM_POOLTAG_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = ExpGetPoolTagInfo(SystemInformation, SystemInformationLength, ReturnLength);
#else
return STATUS_NOT_IMPLEMENTED;
#endif //POOL_TAGGING
break;
case SystemVdmInstemulInformation:
#ifdef i386
if (SystemInformationLength < sizeof(SYSTEM_VDM_INSTEMUL_INFO))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = ExpGetInstemulInformation((PSYSTEM_VDM_INSTEMUL_INFO) SystemInformation);
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = sizeof(SYSTEM_VDM_INSTEMUL_INFO);
}
#else
Status = STATUS_NOT_IMPLEMENTED;
#endif
break;
case SystemCrashDumpInformation:
if (SystemInformationLength < sizeof(SYSTEM_CRASH_DUMP_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
// Only allow callers that have create page file privilege to access crash dump information
if (!SeSinglePrivilegeCheck(SeCreatePagefilePrivilege, PreviousMode))
{
return STATUS_ACCESS_DENIED;
}
Status = MmGetCrashDumpInformation((PSYSTEM_CRASH_DUMP_INFORMATION) SystemInformation);
if (NT_SUCCESS(Status))
{
Status = IoGetCrashDumpInformation((PSYSTEM_CRASH_DUMP_INFORMATION) SystemInformation);
}
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = sizeof(SYSTEM_CRASH_DUMP_INFORMATION);
}
break;
// Get system exception information which includes the number of exceptions that have dispatched, the number of alignment
// fixups, and the number of floating emulations that have been performed.
case SystemExceptionInformation:
if (SystemInformationLength < sizeof(SYSTEM_EXCEPTION_INFORMATION))
{
return STATUS_INFO_LENGTH_MISMATCH;
}
if (ARGUMENT_PRESENT(ReturnLength))
{
*ReturnLength = sizeof(SYSTEM_EXCEPTION_INFORMATION);
}
ExceptionInformation = (PSYSTEM_EXCEPTION_INFORMATION)SystemInformation;
// Ke information.
// These counters are kept on a per processor basis and must be totaled.
{
ULONG AlignmentFixupCount = 0;
ULONG ExceptionDispatchCount = 0;
ULONG FloatingEmulationCount = 0;
ULONG ByteWordEmulationCount = 0;
for (i = 0; i < (ULONG)KeNumberProcessors; i += 1) {
Prcb = KiProcessorBlock[i];
if (Prcb != NULL) {
AlignmentFixupCount += Prcb->KeAlignmentFixupCount;
ExceptionDispatchCount += Prcb->KeExceptionDispatchCount;
FloatingEmulationCount += Prcb->KeFloatingEmulationCount;
#if defined(_ALPHA_)
AlignmentFixupCount += (ULONG)Prcb->Pcr->PalAlignmentFixupCount;
ByteWordEmulationCount += Prcb->KeByteWordEmulationCount;
#endif // defined(_ALPHA_)
}
}
ExceptionInformation->AlignmentFixupCount = AlignmentFixupCount;
ExceptionInformation->ExceptionDispatchCount = ExceptionDispatchCount;
ExceptionInformation->FloatingEmulationCount = FloatingEmulationCount;
ExceptionInformation->ByteWordEmulationCount = ByteWordEmulationCount;
}
break;
case SystemCrashDumpStateInformation:
if (SystemInformationLength < sizeof( SYSTEM_CRASH_STATE_INFORMATION)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = MmGetCrashDumpStateInformation ((PSYSTEM_CRASH_STATE_INFORMATION)SystemInformation);
if ( NT_SUCCESS( Status ) ) {
if (SystemInformationLength >= sizeof (SYSTEM_CRASH_STATE_INFORMATION) ) {
Status = IoGetCrashDumpStateInformation ((PSYSTEM_CRASH_STATE_INFORMATION)SystemInformation);
}
}
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = sizeof(SYSTEM_CRASH_STATE_INFORMATION);
}
break;
case SystemKernelDebuggerInformation:
if (SystemInformationLength < sizeof( SYSTEM_KERNEL_DEBUGGER_INFORMATION)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
KernelDebuggerInformation = (PSYSTEM_KERNEL_DEBUGGER_INFORMATION)SystemInformation;
KernelDebuggerInformation->KernelDebuggerEnabled = KdDebuggerEnabled;
KernelDebuggerInformation->KernelDebuggerNotPresent = KdDebuggerNotPresent;
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = sizeof(SYSTEM_KERNEL_DEBUGGER_INFORMATION);
}
break;
case SystemContextSwitchInformation:
if (SystemInformationLength < sizeof( SYSTEM_CONTEXT_SWITCH_INFORMATION)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
ContextSwitchInformation = (PSYSTEM_CONTEXT_SWITCH_INFORMATION)SystemInformation;
// Compute the total number of context switches and fill in the remainder of the context switch information.
ContextSwitches = 0;
for (i = 0; i < (ULONG)KeNumberProcessors; i += 1) {
Prcb = KiProcessorBlock[i];
if (Prcb != NULL) {
ContextSwitches += Prcb->KeContextSwitches;
}
}
ContextSwitchInformation->ContextSwitches = ContextSwitches;
ContextSwitchInformation->FindAny = KeThreadSwitchCounters.FindAny;
ContextSwitchInformation->FindLast = KeThreadSwitchCounters.FindLast;
ContextSwitchInformation->FindIdeal = KeThreadSwitchCounters.FindIdeal;
ContextSwitchInformation->IdleAny = KeThreadSwitchCounters.IdleAny;
ContextSwitchInformation->IdleCurrent = KeThreadSwitchCounters.IdleCurrent;
ContextSwitchInformation->IdleLast = KeThreadSwitchCounters.IdleLast;
ContextSwitchInformation->IdleIdeal = KeThreadSwitchCounters.IdleIdeal;
ContextSwitchInformation->PreemptAny = KeThreadSwitchCounters.PreemptAny;
ContextSwitchInformation->PreemptCurrent = KeThreadSwitchCounters.PreemptCurrent;
ContextSwitchInformation->PreemptLast = KeThreadSwitchCounters.PreemptLast;
ContextSwitchInformation->SwitchToIdle = KeThreadSwitchCounters.SwitchToIdle;
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = sizeof(SYSTEM_CONTEXT_SWITCH_INFORMATION);
}
break;
case SystemRegistryQuotaInformation:
if (SystemInformationLength < sizeof( SYSTEM_REGISTRY_QUOTA_INFORMATION)) {
return(STATUS_INFO_LENGTH_MISMATCH);
}
CmQueryRegistryQuotaInformation((PSYSTEM_REGISTRY_QUOTA_INFORMATION)SystemInformation);
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = sizeof(SYSTEM_REGISTRY_QUOTA_INFORMATION);
}
break;
case SystemDpcBehaviorInformation:
{
PSYSTEM_DPC_BEHAVIOR_INFORMATION DpcInfo;
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof(SYSTEM_DPC_BEHAVIOR_INFORMATION)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
DpcInfo = (PSYSTEM_DPC_BEHAVIOR_INFORMATION)SystemInformation;
// Exception handler for this routine will return the correct error if any of these accesses fail.
// Return the current DPC behavior variables
DpcInfo->DpcQueueDepth = KiMaximumDpcQueueDepth;
DpcInfo->MinimumDpcRate = KiMinimumDpcRate;
DpcInfo->AdjustDpcThreshold = KiAdjustDpcThreshold;
DpcInfo->IdealDpcRate = KiIdealDpcRate;
}
break;
case SystemInterruptInformation:
if (SystemInformationLength < (sizeof(SYSTEM_INTERRUPT_INFORMATION) * KeNumberProcessors)) {
return(STATUS_INFO_LENGTH_MISMATCH);
}
InterruptInformation = (PSYSTEM_INTERRUPT_INFORMATION)SystemInformation;
for (i=0; i < (ULONG)KeNumberProcessors; i++) {
Prcb = KiProcessorBlock[i];
InterruptInformation->ContextSwitches = Prcb->KeContextSwitches;
InterruptInformation->DpcCount = Prcb->DpcCount;
InterruptInformation->DpcRate = Prcb->DpcRequestRate;
InterruptInformation->TimeIncrement = KeTimeIncrement;
InterruptInformation->DpcBypassCount = Prcb->DpcBypassCount;
InterruptInformation->ApcBypassCount = Prcb->ApcBypassCount;
++InterruptInformation;
}
break;
case SystemCurrentTimeZoneInformation:
if (SystemInformationLength < sizeof( RTL_TIME_ZONE_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
RtlCopyMemory(SystemInformation,&ExpTimeZoneInformation,sizeof(ExpTimeZoneInformation));
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = sizeof( RTL_TIME_ZONE_INFORMATION );
}
Status = STATUS_SUCCESS;
break;
// Query pool lookaside list and general lookaside list information.
case SystemLookasideInformation:
Status = ExpGetLookasideInformation(SystemInformation,SystemInformationLength,&Length);
if (ARGUMENT_PRESENT(ReturnLength)) {
*ReturnLength = Length;
}
break;
case SystemRangeStartInformation:
if ( SystemInformationLength != sizeof(ULONG_PTR) ) {
return STATUS_INFO_LENGTH_MISMATCH;
}
*(PULONG_PTR)SystemInformation = (ULONG_PTR)MmSystemRangeStart;
if (ARGUMENT_PRESENT(ReturnLength) ) {
*ReturnLength = sizeof(ULONG_PTR);
}
break;
case SystemVerifierInformation:
if (SystemInformationLength < sizeof( SYSTEM_VERIFIER_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
Status = MmGetVerifierInformation( SystemInformation,SystemInformationLength,&Length);
if (ARGUMENT_PRESENT( ReturnLength )) {
*ReturnLength = Length;
}
break;
case SystemLegacyDriverInformation:
if (SystemInformationLength < sizeof(SYSTEM_LEGACY_DRIVER_INFORMATION)) {
return(STATUS_INFO_LENGTH_MISMATCH);
}
Length = SystemInformationLength;
Status = ExpQueryLegacyDriverInformation((PSYSTEM_LEGACY_DRIVER_INFORMATION)SystemInformation, &Length);
if (ARGUMENT_PRESENT(ReturnLength)) {
*ReturnLength = Length;
}
break;
default:
// Invalid argument.
return STATUS_INVALID_INFO_CLASS;
}
} except (EXCEPTION_EXECUTE_HANDLER) {
if (ReleaseModuleResoure) {
ExReleaseResource (&PsLoadedModuleResource);
KeLeaveCriticalRegion();
}
Status = GetExceptionCode();
}
return Status;
}
NTSTATUS NTAPI NtSetSystemInformation (IN SYSTEM_INFORMATION_CLASS SystemInformationClass, IN PVOID SystemInformation, IN ULONG SystemInformationLength)
/*++
Routine Description:
This function set information about the system.
Arguments:
SystemInformationClass - The system information class which is to be modified.
SystemInformation - A pointer to a buffer which contains the specified information.
The format and content of the buffer depend on the specified system information class.
SystemInformationLength - Specifies the length in bytes of the system information buffer.
Return Value:
Returns one of the following status codes:
STATUS_SUCCESS - Normal, successful completion.
STATUS_ACCESS_VIOLATION - The specified system information buffer is not accessible.
STATUS_INVALID_INFO_CLASS - The SystemInformationClass parameter did not specify a valid value.
STATUS_INFO_LENGTH_MISMATCH - The value of the SystemInformationLength parameter did not match the length required for the information class requested by the SystemInformationClass parameter.
STATUS_PRIVILEGE_NOT_HELD is returned if the caller does not have the privilege to set the system time.
--*/
{
BOOLEAN Enable;
KPROCESSOR_MODE PreviousMode;
NTSTATUS Status;
ULONG TimeAdjustment;
PSYSTEM_SET_TIME_ADJUST_INFORMATION TimeAdjustmentInformation;
HANDLE EventHandle;
PVOID Event;
PAGED_CODE();
// Establish an exception handle in case the system information buffer is not accessible.
Status = STATUS_SUCCESS;
try {
// Get the previous processor mode and probe the input buffer for read access if necessary.
PreviousMode = KeGetPreviousMode();
if (PreviousMode != KernelMode) {
ProbeForRead((PVOID)SystemInformation, SystemInformationLength, sizeof(ULONG));
}
// Dispatch on the system information class.
switch (SystemInformationClass) {
case SystemFlagsInformation:
if (SystemInformationLength != sizeof( SYSTEM_FLAGS_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (!SeSinglePrivilegeCheck( SeDebugPrivilege, PreviousMode )) {
return STATUS_ACCESS_DENIED;
}
else {
NtGlobalFlag = ((PSYSTEM_FLAGS_INFORMATION)SystemInformation)->Flags & FLG_KERNELMODE_VALID_BITS;
((PSYSTEM_FLAGS_INFORMATION)SystemInformation)->Flags = NtGlobalFlag;
}
break;
// Set system time adjustment information.
// N.B. The caller must have the SeSystemTime privilege.
case SystemTimeAdjustmentInformation:
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof( SYSTEM_SET_TIME_ADJUST_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
// If the current thread does not have the privilege to set the time adjustment variables, then return an error.
if ((PreviousMode != KernelMode) && (SeSinglePrivilegeCheck(SeSystemtimePrivilege, PreviousMode) == FALSE)) {
return STATUS_PRIVILEGE_NOT_HELD;
}
// Set system time adjustment parameters.
TimeAdjustmentInformation = (PSYSTEM_SET_TIME_ADJUST_INFORMATION)SystemInformation;
Enable = TimeAdjustmentInformation->Enable;
TimeAdjustment = TimeAdjustmentInformation->TimeAdjustment;
if (Enable == TRUE) {
KeTimeAdjustment = KeMaximumIncrement;
} else {
if (TimeAdjustment == 0) {
return STATUS_INVALID_PARAMETER_2;
}
KeTimeAdjustment = TimeAdjustment;
}
KeTimeSynchronization = Enable;
break;
// Set an event to signal when the clock interrupt has been masked for too long, causing the time to slip.
// The event will be referenced to prevent it from being deleted.
// If the new event handle is valid or NULL, the old event will be dereferenced and forgotten.
// If the event handle is non-NULL but invalid, the old event will be remembered and a failure status will be returned.
// N.B. The caller must have the SeSystemTime privilege.
case SystemTimeSlipNotification:
if (SystemInformationLength != sizeof(HANDLE)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
// If the current thread does not have the privilege to set the time adjustment variables, then return an error.
if ((PreviousMode != KernelMode) && (SeSinglePrivilegeCheck(SeSystemtimePrivilege, PreviousMode) == FALSE)) {
return STATUS_PRIVILEGE_NOT_HELD;
}
EventHandle = *(PHANDLE)SystemInformation;
if (EventHandle == NULL) {
// Dereference the old event and don't signal anything for time slips.
Event = NULL;
Status = STATUS_SUCCESS;
} else {
Status = ObReferenceObjectByHandle(EventHandle,EVENT_MODIFY_STATE,ExEventObjectType,PreviousMode,&Event,NULL);
}
if (NT_SUCCESS(Status)) {
KdUpdateTimeSlipEvent(Event);
}
break;
// Set registry quota limit.
// N.B. The caller must have SeIncreaseQuotaPrivilege
case SystemRegistryQuotaInformation:
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof( SYSTEM_REGISTRY_QUOTA_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
// If the current thread does not have the privilege to create a pagefile, then return an error.
if ((PreviousMode != KernelMode) && (SeSinglePrivilegeCheck(SeIncreaseQuotaPrivilege, PreviousMode) == FALSE)) {
return STATUS_PRIVILEGE_NOT_HELD;
}
// Set registry quota parameters.
CmSetRegistryQuotaInformation((PSYSTEM_REGISTRY_QUOTA_INFORMATION)SystemInformation);
break;
case SystemPrioritySeperation:
{
ULONG PrioritySeparation;
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof( ULONG )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
try {
PrioritySeparation = *(PULONG)SystemInformation;
}
except(EXCEPTION_EXECUTE_HANDLER) {
return GetExceptionCode();
}
PsChangeQuantumTable(TRUE,PrioritySeparation);
Status = STATUS_SUCCESS;
}
break;
case SystemExtendServiceTableInformation:
{
UNICODE_STRING Image;
PWSTR Buffer;
PVOID ImageBaseAddress;
ULONG_PTR EntryPoint;
PVOID SectionPointer;
PIMAGE_NT_HEADERS NtHeaders;
PDRIVER_INITIALIZE InitRoutine;
DRIVER_OBJECT Win32KDevice;
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof( UNICODE_STRING ) ) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (PreviousMode != KernelMode) {
// The caller's access mode is not kernel so check to ensure that the caller has the privilege to load a driver.
if (!SeSinglePrivilegeCheck( SeLoadDriverPrivilege, PreviousMode )) {
return STATUS_PRIVILEGE_NOT_HELD;
}
try {
UNICODE_STRING tImage;
USHORT maxLength;
Buffer = NULL;
tImage = *(PUNICODE_STRING)SystemInformation;
// Leave room for the NUL, if possible.
// Guard against overflow.
maxLength = tImage.Length + sizeof(UNICODE_NULL);
if (maxLength < tImage.Length || maxLength > tImage.MaximumLength) {
maxLength = tImage.Length;
}
ProbeForRead(tImage.Buffer, maxLength, sizeof(UCHAR));
Buffer = ExAllocatePoolWithTag(PagedPool, maxLength, 'ofnI');
if ( !Buffer ) {
return STATUS_NO_MEMORY;
}
RtlCopyMemory(Buffer, tImage.Buffer, tImage.Length);
Image.Buffer = Buffer;
Image.Length = tImage.Length;
Image.MaximumLength = maxLength;
}
except(EXCEPTION_EXECUTE_HANDLER) {
if ( Buffer ) {
ExFreePool(Buffer);
}
return GetExceptionCode();
}
// Call MmLoadSystemImage with previous mode of kernel.
Status = ZwSetSystemInformation(SystemExtendServiceTableInformation,(PVOID)&Image,sizeof(Image));
ExFreePool(Buffer);
return Status;
}
Image = *(PUNICODE_STRING)SystemInformation;
// Now in kernelmode, so load the driver.
Status = MmLoadSystemImage (&Image,NULL,NULL,TRUE,&SectionPointer,(PVOID *) &ImageBaseAddress);
if (!NT_SUCCESS (Status)) {
return Status;
}
NtHeaders = RtlImageNtHeader( ImageBaseAddress );
EntryPoint = NtHeaders->OptionalHeader.AddressOfEntryPoint;
EntryPoint += (ULONG_PTR) ImageBaseAddress;
InitRoutine = (PDRIVER_INITIALIZE) EntryPoint;
RtlZeroMemory (&Win32KDevice, sizeof(Win32KDevice));
ASSERT (KeGetCurrentIrql() == 0);
Status = (InitRoutine)(&Win32KDevice,NULL);
ASSERT (KeGetCurrentIrql() == 0);
if (!NT_SUCCESS (Status)) {
MmUnloadSystemImage (SectionPointer);
}
else {
// Pass the driver object to memory management so the session can be unloaded cleanly.
MmSessionSetUnloadAddress (&Win32KDevice);
}
}
break;
case SystemUnloadGdiDriverInformation:
{
if (SystemInformationLength != sizeof( PVOID ) ) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (PreviousMode != KernelMode) {
// The caller's access mode is not kernel so fail.
// Only GDI from the kernel can call this.
return STATUS_PRIVILEGE_NOT_HELD;
}
MmUnloadSystemImage( *((PVOID *)SystemInformation) );
Status = STATUS_SUCCESS;
}
break;
case SystemLoadGdiDriverInformation:
{
UNICODE_STRING Image;
PVOID ImageBaseAddress;
ULONG_PTR EntryPoint;
PVOID SectionPointer;
PIMAGE_NT_HEADERS NtHeaders;
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof( SYSTEM_GDI_DRIVER_INFORMATION ) ) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (PreviousMode != KernelMode) {
// The caller's access mode is not kernel so fail.
// Only GDI from the kernel can call this.
return STATUS_PRIVILEGE_NOT_HELD;
}
Image = ((PSYSTEM_GDI_DRIVER_INFORMATION)SystemInformation)->DriverName;
Status = MmLoadSystemImage (&Image,NULL,NULL,TRUE,&SectionPointer,(PVOID *) &ImageBaseAddress);
// Some drivers (like dxapi.sys) may be already loaded by a minidriver that links to it - allow these to re-succeed.
if ((NT_SUCCESS( Status )) || (Status == STATUS_IMAGE_ALREADY_LOADED)) {
PSYSTEM_GDI_DRIVER_INFORMATION GdiDriverInfo = (PSYSTEM_GDI_DRIVER_INFORMATION) SystemInformation;
ULONG Size;
PVOID BaseAddress;
GdiDriverInfo->ExportSectionPointer = RtlImageDirectoryEntryToData(ImageBaseAddress,TRUE,IMAGE_DIRECTORY_ENTRY_EXPORT,&Size);
// Capture the entry point.
NtHeaders = RtlImageNtHeader( ImageBaseAddress );
EntryPoint = NtHeaders->OptionalHeader.AddressOfEntryPoint;
EntryPoint += (ULONG_PTR) ImageBaseAddress;
GdiDriverInfo->ImageAddress = (PVOID) ImageBaseAddress;
GdiDriverInfo->SectionPointer = SectionPointer;
GdiDriverInfo->EntryPoint = (PVOID) EntryPoint;
// GDI drivers are always completely pagable.
if (NT_SUCCESS( Status )) {
BaseAddress = MmPageEntireDriver((PVOID)ImageBaseAddress);
ASSERT(BaseAddress == ImageBaseAddress);
}
}
}
break;
case SystemFileCacheInformation:
if (SystemInformationLength < sizeof( SYSTEM_FILECACHE_INFORMATION )) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (!SeSinglePrivilegeCheck( SeIncreaseQuotaPrivilege, PreviousMode )) {
return STATUS_ACCESS_DENIED;
}
return MmAdjustWorkingSetSize (((PSYSTEM_FILECACHE_INFORMATION)SystemInformation)->MinimumWorkingSet, ((PSYSTEM_FILECACHE_INFORMATION)SystemInformation)->MaximumWorkingSet, TRUE);
break;
case SystemDpcBehaviorInformation:
{
SYSTEM_DPC_BEHAVIOR_INFORMATION DpcInfo;
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof(SYSTEM_DPC_BEHAVIOR_INFORMATION)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (PreviousMode != KernelMode) {
// The caller's access mode is not kernel so check to ensure that the caller has the privilege to load a driver.
if (!SeSinglePrivilegeCheck( SeLoadDriverPrivilege, PreviousMode )) {
return STATUS_PRIVILEGE_NOT_HELD;
}
}
// Exception handler for this routine will return the correct error if this access fails.
DpcInfo = *(PSYSTEM_DPC_BEHAVIOR_INFORMATION)SystemInformation;
// Set the new DPC behavior variables
KiMaximumDpcQueueDepth = DpcInfo.DpcQueueDepth;
KiMinimumDpcRate = DpcInfo.MinimumDpcRate;
KiAdjustDpcThreshold = DpcInfo.AdjustDpcThreshold;
KiIdealDpcRate = DpcInfo.IdealDpcRate;
}
break;
case SystemSessionCreate:
{
// Creation of a session space.
ULONG SessionId;
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof(ULONG)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (PreviousMode != KernelMode) {
// The caller's access mode is not kernel so check to ensure that the caller has the privilege to load a driver.
if (!SeSinglePrivilegeCheck (SeLoadDriverPrivilege, PreviousMode)) {
return STATUS_PRIVILEGE_NOT_HELD;
}
try {
ProbeForWriteUlong((PULONG)SystemInformation);
}
except (EXCEPTION_EXECUTE_HANDLER) {
return GetExceptionCode();
}
}
// Create a session space in the current process.
Status = MmSessionCreate (&SessionId);
if (NT_SUCCESS(Status)) {
if (PreviousMode != KernelMode) {
try {
*(PULONG)SystemInformation = SessionId;
}
except (EXCEPTION_EXECUTE_HANDLER) {
return GetExceptionCode();
}
}
else {
*(PULONG)SystemInformation = SessionId;
}
}
return Status;
}
break;
case SystemSessionDetach:
{
ULONG SessionId;
// If the system information buffer is not the correct length, then return an error.
if (SystemInformationLength != sizeof(ULONG)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (PreviousMode != KernelMode) {
// The caller's access mode is not kernel so check to ensure that the caller has the privilege to load a driver.
if (!SeSinglePrivilegeCheck( SeLoadDriverPrivilege, PreviousMode )) {
return STATUS_PRIVILEGE_NOT_HELD;
}
try {
ProbeForRead ((PVOID)SystemInformation,sizeof(ULONG),sizeof(ULONG));
SessionId = *(PULONG)SystemInformation;
}
except (EXCEPTION_EXECUTE_HANDLER) {
return GetExceptionCode();
}
}
else {
SessionId = *(PULONG)SystemInformation;
}
// Detach the current process from a session space if it has one.
Status = MmSessionDelete (SessionId);
return Status;
}
break;
case SystemCrashDumpStateInformation:
if (SystemInformationLength < sizeof( SYSTEM_CRASH_STATE_INFORMATION)) {
return STATUS_INFO_LENGTH_MISMATCH;
}
if (!SeSinglePrivilegeCheck( SeCreatePagefilePrivilege, PreviousMode )) {
return STATUS_ACCESS_DENIED;
}
Status = IoSetCrashDumpState( (SYSTEM_CRASH_STATE_INFORMATION *)SystemInformation);
break;
case SystemPerformanceTraceInformation:
#ifdef NTPERF
Status = PerformanceTraceInformation(SystemInformationClass,SystemInformation,SystemInformationLength);
#else
Status = STATUS_INVALID_INFO_CLASS;
#endif
break;
case SystemVerifierThunkExtend:
if (PreviousMode != KernelMode) {
// The caller's access mode is not kernel so fail.
// Only device drivers can call this.
return STATUS_PRIVILEGE_NOT_HELD;
}
Status = MmAddVerifierThunks (SystemInformation,SystemInformationLength);
break;
case SystemVerifierInformation:
if (!SeSinglePrivilegeCheck (SeDebugPrivilege, PreviousMode)) {
return STATUS_ACCESS_DENIED;
}
Status = MmSetVerifierInformation (SystemInformation,SystemInformationLength);
break;
default:
//KeBugCheckEx(SystemInformationClass,KdPitchDebugger,0,0,0);
Status = STATUS_INVALID_INFO_CLASS;
break;
}
} except (EXCEPTION_EXECUTE_HANDLER) {
Status = GetExceptionCode();
}
return Status;
}
PVOID ExLockUserBuffer(IN PVOID Buffer,IN ULONG Length,OUT PVOID *LockVariable)
{
PMDL Mdl;
PVOID Address;
SIZE_T MdlSize;
// Allocate an MDL to map the request.
MdlSize = MmSizeOfMdl( Buffer, Length );
Mdl = ExAllocatePoolWithQuotaTag (NonPagedPool, MdlSize, 'ofnI');
if (Mdl == NULL) {
return NULL;
}
// Initialize MDL for request.
MmInitializeMdl(Mdl, Buffer, Length);
try {
MmProbeAndLockPages (Mdl, KeGetPreviousMode(), IoWriteAccess);
} except (EXCEPTION_EXECUTE_HANDLER) {
ExFreePool (Mdl);
return( NULL );
}
Mdl->MdlFlags |= MDL_MAPPING_CAN_FAIL;
Address = MmGetSystemAddressForMdl (Mdl);
*LockVariable = Mdl;
if (Address == NULL) {
ExUnlockUserBuffer (Mdl);
*LockVariable = NULL;
}
return Address;
}
VOID ExUnlockUserBuffer(IN PVOID LockVariable)
{
MmUnlockPages ((PMDL)LockVariable);
ExFreePool ((PMDL)LockVariable);
}
extern FAST_MUTEX PspActiveProcessMutex;
NTSTATUS ExpGetProcessInformation (OUT PVOID SystemInformation,IN ULONG SystemInformationLength,OUT PULONG Length,IN PULONG SessionId OPTIONAL)
/*++
Routine Description:
This function returns information about all the processes and threads in the system.
Arguments:
SystemInformation - A pointer to a buffer which receives the specified information.
SystemInformationLength - Specifies the length in bytes of the system information buffer.
Length - An optional pointer which, if specified, receives the number of bytes placed in the system information buffer.
Return Value:
Returns one of the following status codes:
STATUS_SUCCESS - normal, successful completion.
STATUS_INVALID_INFO_CLASS - The SystemInformationClass parameter did not specify a valid value.
STATUS_INFO_LENGTH_MISMATCH - The value of the SystemInformationLength parameter did not match the length required for the information class requested by the SystemInformationClass parameter.
STATUS_ACCESS_VIOLATION - Either the SystemInformation buffer pointer or the Length pointer value specified an invalid address.
STATUS_WORKING_SET_QUOTA - The process does not have sufficient working set to lock the specified output structure in memory.
STATUS_INSUFFICIENT_RESOURCES - Insufficient system resources exist for this request to complete.
--*/
{
KEVENT Event;
PEPROCESS Process;
PETHREAD Thread;
PSYSTEM_PROCESS_INFORMATION ProcessInfo;
PSYSTEM_THREAD_INFORMATION ThreadInfo;
PLIST_ENTRY NextProcess;
PLIST_ENTRY NextThread;
PVOID MappedAddress;
PVOID LockVariable;
ULONG TotalSize = 0;
ULONG NextEntryOffset = 0;
PUCHAR Src;
PWSTR Dst;
ULONG n;
NTSTATUS status = STATUS_SUCCESS;
*Length = 0;
MappedAddress = ExLockUserBuffer( SystemInformation,SystemInformationLength,&LockVariable);
if (MappedAddress == NULL) {
return( STATUS_ACCESS_VIOLATION );
}
MmLockPagableSectionByHandle (ExPageLockHandle);
ExAcquireFastMutex(&PspActiveProcessMutex);
// Initialize an event object and then set the event with the wait parameter TRUE.
// This causes the event to be set and control is returned with the dispatcher database locked at dispatch IRQL.
KeInitializeEvent (&Event, NotificationEvent, FALSE);
try {
ProcessInfo = (PSYSTEM_PROCESS_INFORMATION)MappedAddress;
if (!ARGUMENT_PRESENT(SessionId)) {
NextEntryOffset = sizeof(SYSTEM_PROCESS_INFORMATION);
TotalSize = sizeof(SYSTEM_PROCESS_INFORMATION);
ExpCopyProcessInfo (ProcessInfo, PsIdleProcess);
// Since Idle process and system process share the same object table, zero out idle processes handle count to reduce confusion
ProcessInfo->HandleCount = 0;
// Idle Process always has SessionId 0
ProcessInfo->SessionId = 0;
// Set the event with the wait parameter TRUE.
// This causes the event to be set and control is returned with the dispatcher database locked at dispatch IRQL.
// WARNING - The following code assumes that the process structure uses kernel objects to synchronize access to the thread and process lists.
KeSetEvent (&Event, 0, TRUE);
// WARNING - The following code runs with the kernel dispatch database locked.
// EXTREME caution should be taken when modifying this code.
// Extended execution will ADVERSELY affect system operation and integrity.
// Get info for idle process's threads
// Get information for each thread.
ThreadInfo = (PSYSTEM_THREAD_INFORMATION)(ProcessInfo + 1);
ProcessInfo->NumberOfThreads = 0;
NextThread = PsIdleProcess->Pcb.ThreadListHead.Flink;
while (NextThread != &PsIdleProcess->Pcb.ThreadListHead) {
NextEntryOffset += sizeof(SYSTEM_THREAD_INFORMATION);
TotalSize += sizeof(SYSTEM_THREAD_INFORMATION);
if (TotalSize > SystemInformationLength) {
status = STATUS_INFO_LENGTH_MISMATCH;
KeWaitForSingleObject (&Event, Executive, KernelMode, FALSE, NULL);
goto Failed;
}
Thread = (PETHREAD)(CONTAINING_RECORD(NextThread, KTHREAD, ThreadListEntry));
ExpCopyThreadInfo (ThreadInfo,Thread);
ProcessInfo->NumberOfThreads += 1;
NextThread = NextThread->Flink;
ThreadInfo += 1;
}
// Unlock the dispatch database by waiting on the event that was previously set with the wait parameter TRUE.
KeWaitForSingleObject (&Event, Executive, KernelMode, FALSE, NULL);
ProcessInfo->ImageName.Buffer = NULL;
ProcessInfo->ImageName.Length = 0;
ProcessInfo->NextEntryOffset = NextEntryOffset;
}
NextProcess = PsActiveProcessHead.Flink;
while (NextProcess != &PsActiveProcessHead) {
Process = CONTAINING_RECORD(NextProcess,EPROCESS,ActiveProcessLinks);
if (ARGUMENT_PRESENT(SessionId) && (Process->SessionId != *SessionId)) {
NextProcess = NextProcess->Flink;
continue;
}
ProcessInfo = (PSYSTEM_PROCESS_INFORMATION)((PUCHAR)MappedAddress + TotalSize);
NextEntryOffset = sizeof(SYSTEM_PROCESS_INFORMATION);
TotalSize += sizeof(SYSTEM_PROCESS_INFORMATION);
if (TotalSize > SystemInformationLength) {
status = STATUS_INFO_LENGTH_MISMATCH;
goto Failed;
}
// Get information for each process.
ExpCopyProcessInfo (ProcessInfo, Process);
// Set the event with the wait parameter TRUE.
// This causes the event to be set and control is returned with the dispatcher database locked at dispatch IRQL.
// WARNING - The following code assumes that the process structure uses kernel objects to synchronize access to the thread and process lists.
KeSetEvent (&Event, 0, TRUE);
// WARNING - The following code runs with the kernel dispatch database locked.
// EXTREME caution should be taken when modifying this code.
// Extended execution will ADVERSELY affect system operation and integrity.
// Get information for each thread.
ThreadInfo = (PSYSTEM_THREAD_INFORMATION)(ProcessInfo + 1);
ProcessInfo->NumberOfThreads = 0;
NextThread = Process->Pcb.ThreadListHead.Flink;
while (NextThread != &Process->Pcb.ThreadListHead) {
NextEntryOffset += sizeof(SYSTEM_THREAD_INFORMATION);
TotalSize += sizeof(SYSTEM_THREAD_INFORMATION);
if (TotalSize > SystemInformationLength) {
status = STATUS_INFO_LENGTH_MISMATCH;
KeWaitForSingleObject (&Event, Executive, KernelMode, FALSE, NULL);
goto Failed;
}
Thread = (PETHREAD)(CONTAINING_RECORD(NextThread,KTHREAD,ThreadListEntry));
ExpCopyThreadInfo (ThreadInfo,Thread);
ProcessInfo->NumberOfThreads += 1;
NextThread = NextThread->Flink;
ThreadInfo += 1;
}
// Store the Remote Terminal SessionId
ProcessInfo->SessionId = Process->SessionId;
// Unlock the dispatch database by waiting on the event that was previously set with the wait parameter TRUE.
KeWaitForSingleObject (&Event, Executive, KernelMode, FALSE, NULL);
// Get the image name.
ProcessInfo->ImageName.Buffer = NULL;
ProcessInfo->ImageName.Length = 0;
ProcessInfo->ImageName.MaximumLength = 0;
if ((n = strlen( Src = Process->ImageFileName ))) {
n = ROUND_UP( ((n + 1) * sizeof( WCHAR )), sizeof(LARGE_INTEGER) );
TotalSize += n;
NextEntryOffset += n;
if (TotalSize > SystemInformationLength) {
status = STATUS_INFO_LENGTH_MISMATCH;
} else {
Dst = (PWSTR)(ThreadInfo);
while (*Dst++ = (WCHAR)*Src++) {
;
}
ProcessInfo->ImageName.Length = (USHORT)((PCHAR)Dst - (PCHAR)ThreadInfo - sizeof( UNICODE_NULL ));
ProcessInfo->ImageName.MaximumLength = (USHORT)n;
// Set the image name to point into the user's memory.
ProcessInfo->ImageName.Buffer = (PWSTR) ((PCHAR)SystemInformation + ((PCHAR)(ThreadInfo) - (PCHAR)MappedAddress));
}
if (!NT_SUCCESS( status )) {
goto Failed;
}
}
// Point to next process.
ProcessInfo->NextEntryOffset = NextEntryOffset;
NextProcess = NextProcess->Flink;
}
ProcessInfo->NextEntryOffset = 0;
status = STATUS_SUCCESS;
*Length = TotalSize;
Failed:
;
} finally {
ExReleaseFastMutex(&PspActiveProcessMutex);
MmUnlockPagableImageSection(ExPageLockHandle);
ExUnlockUserBuffer( LockVariable );
}
return(status);
}
VOID ExpCopyProcessInfo (IN PSYSTEM_PROCESS_INFORMATION ProcessInfo,IN PEPROCESS Process)
{
PHANDLE_TABLE Ht;
PAGED_CODE();
Ht = (PHANDLE_TABLE)Process->ObjectTable;
if ( Ht ) {
ProcessInfo->HandleCount = Ht->HandleCount;
}
else {
ProcessInfo->HandleCount = 0;
}
ProcessInfo->CreateTime = Process->CreateTime;
ProcessInfo->UserTime.QuadPart = UInt32x32To64(Process->Pcb.UserTime, KeMaximumIncrement);
ProcessInfo->KernelTime.QuadPart = UInt32x32To64(Process->Pcb.KernelTime, KeMaximumIncrement);
ProcessInfo->BasePriority = Process->Pcb.BasePriority;
ProcessInfo->UniqueProcessId = Process->UniqueProcessId;
ProcessInfo->InheritedFromUniqueProcessId = Process->InheritedFromUniqueProcessId;
ProcessInfo->PeakVirtualSize = Process->PeakVirtualSize;
ProcessInfo->VirtualSize = Process->VirtualSize;
ProcessInfo->PageFaultCount = Process->Vm.PageFaultCount;
ProcessInfo->PeakWorkingSetSize = Process->Vm.PeakWorkingSetSize << PAGE_SHIFT;
ProcessInfo->WorkingSetSize = Process->Vm.WorkingSetSize << PAGE_SHIFT;
ProcessInfo->QuotaPeakPagedPoolUsage = Process->QuotaPeakPoolUsage[PagedPool];
ProcessInfo->QuotaPagedPoolUsage = Process->QuotaPoolUsage[PagedPool];
ProcessInfo->QuotaPeakNonPagedPoolUsage = Process->QuotaPeakPoolUsage[NonPagedPool];
ProcessInfo->QuotaNonPagedPoolUsage = Process->QuotaPoolUsage[NonPagedPool];
ProcessInfo->PagefileUsage = Process->PagefileUsage << PAGE_SHIFT;
ProcessInfo->PeakPagefileUsage = Process->PeakPagefileUsage << PAGE_SHIFT;
ProcessInfo->PrivatePageCount = Process->CommitCharge << PAGE_SHIFT;
ProcessInfo->ReadOperationCount = Process->ReadOperationCount;
ProcessInfo->WriteOperationCount = Process->WriteOperationCount;
ProcessInfo->OtherOperationCount = Process->OtherOperationCount;
ProcessInfo->ReadTransferCount = Process->ReadTransferCount;
ProcessInfo->WriteTransferCount = Process->WriteTransferCount;
ProcessInfo->OtherTransferCount = Process->OtherTransferCount;
}
VOID ExpCopyThreadInfo (IN PSYSTEM_THREAD_INFORMATION ThreadInfo, IN PETHREAD Thread)
{
ThreadInfo->KernelTime.QuadPart = UInt32x32To64(Thread->Tcb.KernelTime, KeMaximumIncrement);
ThreadInfo->UserTime.QuadPart = UInt32x32To64(Thread->Tcb.UserTime, KeMaximumIncrement);
ThreadInfo->CreateTime.QuadPart = PS_GET_THREAD_CREATE_TIME (Thread);
ThreadInfo->WaitTime = Thread->Tcb.WaitTime;
ThreadInfo->ClientId = Thread->Cid;
ThreadInfo->ThreadState = Thread->Tcb.State;
ThreadInfo->WaitReason = Thread->Tcb.WaitReason;
ThreadInfo->Priority = Thread->Tcb.Priority;
ThreadInfo->BasePriority = Thread->Tcb.BasePriority;
ThreadInfo->ContextSwitches = Thread->Tcb.ContextSwitches;
ThreadInfo->StartAddress = Thread->StartAddress;
}
#ifdef i386
extern ULONG ExVdmOpcodeDispatchCounts[256];
extern ULONG VdmBopCount;
extern ULONG ExVdmSegmentNotPresent;
#if defined(ALLOC_PRAGMA)
#pragma alloc_text(PAGE, ExpGetInstemulInformation)
#endif
NTSTATUS ExpGetInstemulInformation(OUT PSYSTEM_VDM_INSTEMUL_INFO Info)
{
SYSTEM_VDM_INSTEMUL_INFO LocalInfo;
LocalInfo.VdmOpcode0F = ExVdmOpcodeDispatchCounts[VDM_INDEX_0F];
LocalInfo.OpcodeESPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_ESPrefix];
LocalInfo.OpcodeCSPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_CSPrefix];
LocalInfo.OpcodeSSPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_SSPrefix];
LocalInfo.OpcodeDSPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_DSPrefix];
LocalInfo.OpcodeFSPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_FSPrefix];
LocalInfo.OpcodeGSPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_GSPrefix];
LocalInfo.OpcodeOPER32Prefix= ExVdmOpcodeDispatchCounts[VDM_INDEX_OPER32Prefix];
LocalInfo.OpcodeADDR32Prefix= ExVdmOpcodeDispatchCounts[VDM_INDEX_ADDR32Prefix];
LocalInfo.OpcodeINSB = ExVdmOpcodeDispatchCounts[VDM_INDEX_INSB];
LocalInfo.OpcodeINSW = ExVdmOpcodeDispatchCounts[VDM_INDEX_INSW];
LocalInfo.OpcodeOUTSB = ExVdmOpcodeDispatchCounts[VDM_INDEX_OUTSB];
LocalInfo.OpcodeOUTSW = ExVdmOpcodeDispatchCounts[VDM_INDEX_OUTSW];
LocalInfo.OpcodePUSHF = ExVdmOpcodeDispatchCounts[VDM_INDEX_PUSHF];
LocalInfo.OpcodePOPF = ExVdmOpcodeDispatchCounts[VDM_INDEX_POPF];
LocalInfo.OpcodeINTnn = ExVdmOpcodeDispatchCounts[VDM_INDEX_INTnn];
LocalInfo.OpcodeINTO = ExVdmOpcodeDispatchCounts[VDM_INDEX_INTO];
LocalInfo.OpcodeIRET = ExVdmOpcodeDispatchCounts[VDM_INDEX_IRET];
LocalInfo.OpcodeINBimm = ExVdmOpcodeDispatchCounts[VDM_INDEX_INBimm];
LocalInfo.OpcodeINWimm = ExVdmOpcodeDispatchCounts[VDM_INDEX_INWimm];
LocalInfo.OpcodeOUTBimm = ExVdmOpcodeDispatchCounts[VDM_INDEX_OUTBimm];
LocalInfo.OpcodeOUTWimm = ExVdmOpcodeDispatchCounts[VDM_INDEX_OUTWimm];
LocalInfo.OpcodeINB = ExVdmOpcodeDispatchCounts[VDM_INDEX_INB];
LocalInfo.OpcodeINW = ExVdmOpcodeDispatchCounts[VDM_INDEX_INW];
LocalInfo.OpcodeOUTB = ExVdmOpcodeDispatchCounts[VDM_INDEX_OUTB];
LocalInfo.OpcodeOUTW = ExVdmOpcodeDispatchCounts[VDM_INDEX_OUTW];
LocalInfo.OpcodeLOCKPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_LOCKPrefix];
LocalInfo.OpcodeREPNEPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_REPNEPrefix];
LocalInfo.OpcodeREPPrefix = ExVdmOpcodeDispatchCounts[VDM_INDEX_REPPrefix];
LocalInfo.OpcodeHLT = ExVdmOpcodeDispatchCounts[VDM_INDEX_HLT];
LocalInfo.OpcodeCLI = ExVdmOpcodeDispatchCounts[VDM_INDEX_CLI];
LocalInfo.OpcodeSTI = ExVdmOpcodeDispatchCounts[VDM_INDEX_STI];
LocalInfo.BopCount = VdmBopCount;
LocalInfo.SegmentNotPresent = ExVdmSegmentNotPresent;
RtlMoveMemory(Info,&LocalInfo,sizeof(LocalInfo));
return STATUS_SUCCESS;
}
#endif
#if i386 && !FPO
NTSTATUS ExpGetStackTraceInformation (OUT PVOID SystemInformation,IN ULONG SystemInformationLength,OUT PULONG ReturnLength OPTIONAL)
{
NTSTATUS Status;
PRTL_PROCESS_BACKTRACES BackTraceInformation = (PRTL_PROCESS_BACKTRACES)SystemInformation;
PRTL_PROCESS_BACKTRACE_INFORMATION BackTraceInfo;
PSTACK_TRACE_DATABASE DataBase;
PRTL_STACK_TRACE_ENTRY p, *pp;
ULONG RequiredLength, n;
DataBase = RtlpAcquireStackTraceDataBase();
if (DataBase == NULL) {
return STATUS_UNSUCCESSFUL;
}
DataBase->DumpInProgress = TRUE;
RtlpReleaseStackTraceDataBase();
try {
RequiredLength = FIELD_OFFSET( RTL_PROCESS_BACKTRACES, BackTraces );
if (SystemInformationLength < RequiredLength) {
Status = STATUS_INFO_LENGTH_MISMATCH;
}
else {
BackTraceInformation->CommittedMemory = (ULONG)DataBase->CurrentUpperCommitLimit - (ULONG)DataBase->CommitBase;
BackTraceInformation->ReservedMemory = (ULONG)DataBase->EntryIndexArray - (ULONG)DataBase->CommitBase;
BackTraceInformation->NumberOfBackTraceLookups = DataBase->NumberOfEntriesLookedUp;
n = DataBase->NumberOfEntriesAdded;
BackTraceInformation->NumberOfBackTraces = n;
}
RequiredLength += (sizeof( *BackTraceInfo ) * n);
if (SystemInformationLength < RequiredLength) {
Status = STATUS_INFO_LENGTH_MISMATCH;
}
else {
Status = STATUS_SUCCESS;
BackTraceInfo = &BackTraceInformation->BackTraces[ 0 ];
pp = DataBase->EntryIndexArray;
while (n--) {
p = *--pp;
BackTraceInfo->SymbolicBackTrace = NULL;
BackTraceInfo->TraceCount = p->TraceCount;
BackTraceInfo->Index = p->Index;
BackTraceInfo->Depth = p->Depth;
RtlMoveMemory( BackTraceInfo->BackTrace,p->BackTrace,p->Depth * sizeof( PVOID ));
BackTraceInfo++;
}
}
}
finally {
DataBase->DumpInProgress = FALSE;
}
if (ARGUMENT_PRESENT(ReturnLength)) {
*ReturnLength = RequiredLength;
}
return Status;
}
#endif // i386 && !FPO
NTSTATUS ExpGetLockInformation (OUT PVOID SystemInformation,IN ULONG SystemInformationLength,OUT PULONG Length)
/*++
Routine Description:
This function returns information about all the ERESOURCE locks in the system.
Arguments:
SystemInformation - A pointer to a buffer which receives the specified information.
SystemInformationLength - Specifies the length in bytes of the system information buffer.
Length - An optional pointer which, if specified, receives the number of bytes placed in the system information buffer.
Return Value:
Returns one of the following status codes:
STATUS_SUCCESS - normal, successful completion.
STATUS_INVALID_INFO_CLASS - The SystemInformationClass parameter did not specify a valid value.
STATUS_INFO_LENGTH_MISMATCH - The value of the SystemInformationLength parameter did not match the length required for the information class requested by the SystemInformationClass parameter.
STATUS_ACCESS_VIOLATION - Either the SystemInformation buffer pointer or the Length pointer value specified an invalid address.
STATUS_WORKING_SET_QUOTA - The process does not have sufficient working set to lock the specified output structure in memory.
STATUS_INSUFFICIENT_RESOURCES - Insufficient system resources exist for this request to complete.
--*/
{
PRTL_PROCESS_LOCKS LockInfo;
PVOID LockVariable;
NTSTATUS Status;
*Length = 0;
LockInfo = (PRTL_PROCESS_LOCKS) ExLockUserBuffer( SystemInformation, SystemInformationLength, &LockVariable);
if (LockInfo == NULL) {
return( STATUS_ACCESS_VIOLATION );
}
MmLockPagableSectionByHandle (ExPageLockHandle);
try {
Status = ExQuerySystemLockInformation( LockInfo, SystemInformationLength, Length);
}
finally {
ExUnlockUserBuffer( LockVariable );
MmUnlockPagableImageSection(ExPageLockHandle);
}
return( Status );
}
NTSTATUS ExpGetLookasideInformation (OUT PVOID Buffer,IN ULONG BufferLength,OUT PULONG Length)
/*++
Routine Description:
This function returns pool lookaside list and general lookaside list information.
Arguments:
Buffer - Supplies a pointer to the buffer which receives the lookaside list information.
BufferLength - Supplies the length of the information buffer in bytes.
Length - Supplies a pointer to a variable that receives the length of lookaside information returned.
Return Value:
Returns one of the following status codes:
STATUS_SUCCESS - Normal, successful completion.
STATUS_ACCESS_VIOLATION - The buffer could not be locked in memory.
--*/
{
PVOID BufferLock;
PLIST_ENTRY Entry;
ULONG Index;
KIRQL OldIrql;
ULONG Limit;
PSYSTEM_LOOKASIDE_INFORMATION Lookaside;
ULONG Number;
PNPAGED_LOOKASIDE_LIST NPagedLookaside;
PPAGED_LOOKASIDE_LIST PagedLookaside;
PNPAGED_LOOKASIDE_LIST PoolLookaside;
PKSPIN_LOCK SpinLock;
NTSTATUS Status;
// Compute the number of lookaside entries and set the return status to success.
Limit = BufferLength / sizeof(SYSTEM_LOOKASIDE_INFORMATION);
Number = 0;
Status = STATUS_SUCCESS;
// If the number of lookaside entries to return is not zero, then collect the lookaside information.
if (Limit != 0) {
if ((Lookaside = (PSYSTEM_LOOKASIDE_INFORMATION)ExLockUserBuffer(Buffer, BufferLength, &BufferLock)) == NULL) {
Status = STATUS_ACCESS_VIOLATION;
} else {
MmLockPagableSectionByHandle(ExPageLockHandle);
// Copy nonpaged and paged pool lookaside information to information buffer.
Entry = ExPoolLookasideListHead.Flink;
while (Entry != &ExPoolLookasideListHead) {
PoolLookaside = CONTAINING_RECORD(Entry, NPAGED_LOOKASIDE_LIST, L.ListEntry);
Lookaside->CurrentDepth = (USHORT)PoolLookaside->L.ListHead.Depth;
Lookaside->MaximumDepth = PoolLookaside->L.Depth;
Lookaside->TotalAllocates = PoolLookaside->L.TotalAllocates;
Lookaside->AllocateMisses = PoolLookaside->L.TotalAllocates - PoolLookaside->L.AllocateHits;
Lookaside->TotalFrees = PoolLookaside->L.TotalFrees;
Lookaside->FreeMisses = PoolLookaside->L.TotalFrees - PoolLookaside->L.FreeHits;
Lookaside->Type = PoolLookaside->L.Type;
Lookaside->Tag = PoolLookaside->L.Tag;
Lookaside->Size = PoolLookaside->L.Size;
Number += 1;
if (Number == Limit) {
goto Finish2;
}
Entry = Entry->Flink;
Lookaside += 1;
}
// Copy nonpaged general lookaside information to buffer.
SpinLock = &ExNPagedLookasideLock;
ExAcquireSpinLock(SpinLock, &OldIrql);
Entry = ExNPagedLookasideListHead.Flink;
while (Entry != &ExNPagedLookasideListHead) {
NPagedLookaside = CONTAINING_RECORD(Entry, NPAGED_LOOKASIDE_LIST, L.ListEntry);
Lookaside->CurrentDepth = (USHORT)NPagedLookaside->L.ListHead.Depth;
Lookaside->MaximumDepth = NPagedLookaside->L.Depth;
Lookaside->TotalAllocates = NPagedLookaside->L.TotalAllocates;
Lookaside->AllocateMisses = NPagedLookaside->L.AllocateMisses;
Lookaside->TotalFrees = NPagedLookaside->L.TotalFrees;
Lookaside->FreeMisses = NPagedLookaside->L.FreeMisses;
Lookaside->Type = 0;
Lookaside->Tag = NPagedLookaside->L.Tag;
Lookaside->Size = NPagedLookaside->L.Size;
Number += 1;
if (Number == Limit) {
goto Finish1;
}
Entry = Entry->Flink;
Lookaside += 1;
}
ExReleaseSpinLock(SpinLock, OldIrql);
// Copy paged general lookaside information to buffer.
SpinLock = &ExPagedLookasideLock;
ExAcquireSpinLock(SpinLock, &OldIrql);
Entry = ExPagedLookasideListHead.Flink;
while (Entry != &ExPagedLookasideListHead) {
PagedLookaside = CONTAINING_RECORD(Entry, PAGED_LOOKASIDE_LIST, L.ListEntry);
Lookaside->CurrentDepth = (USHORT)PagedLookaside->L.ListHead.Depth;
Lookaside->MaximumDepth = PagedLookaside->L.Depth;
Lookaside->TotalAllocates = PagedLookaside->L.TotalAllocates;
Lookaside->AllocateMisses = PagedLookaside->L.AllocateMisses;
Lookaside->TotalFrees = PagedLookaside->L.TotalFrees;
Lookaside->FreeMisses = PagedLookaside->L.FreeMisses;
Lookaside->Type = 1;
Lookaside->Tag = PagedLookaside->L.Tag;
Lookaside->Size = PagedLookaside->L.Size;
Number += 1;
if (Number == Limit) {
goto Finish1;
}
Entry = Entry->Flink;
Lookaside += 1;
}
Finish1:
ExReleaseSpinLock(SpinLock, OldIrql);
// Unlock user buffer and page lock image section.
Finish2:
MmUnlockPagableImageSection(ExPageLockHandle);
ExUnlockUserBuffer(BufferLock);
}
}
*Length = Number * sizeof(SYSTEM_LOOKASIDE_INFORMATION);
return Status;
}
NTSTATUS ExpGetPoolInformation(IN POOL_TYPE PoolType,OUT PVOID SystemInformation,IN ULONG SystemInformationLength,OUT PULONG Length)
/*++
Routine Description:
This function returns information about the specified type of pool memory.
Arguments:
SystemInformation - A pointer to a buffer which receives the specified information.
SystemInformationLength - Specifies the length in bytes of the system information buffer.
Length - An optional pointer which, if specified, receives the number of bytes placed in the system information buffer.
Return Value:
Returns one of the following status codes:
STATUS_SUCCESS - normal, successful completion.
STATUS_INVALID_INFO_CLASS - The SystemInformationClass parameter did not specify a valid value.
STATUS_INFO_LENGTH_MISMATCH - The value of the SystemInformationLength parameter did not match the length required for the information class requested by the SystemInformationClass parameter.
STATUS_ACCESS_VIOLATION - Either the SystemInformation buffer pointer or the Length pointer value specified an invalid address.
STATUS_WORKING_SET_QUOTA - The process does not have sufficient working set to lock the specified output structure in memory.
STATUS_INSUFFICIENT_RESOURCES - Insufficient system resources exist for this request to complete.
--*/
{
#if DBG || (i386 && !FPO)
// Only works on checked builds or free x86 builds with FPO turned off
// See comment in mm\allocpag.c
PSYSTEM_POOL_INFORMATION PoolInfo;
PVOID LockVariable;
NTSTATUS Status;
*Length = 0;
PoolInfo = (PSYSTEM_POOL_INFORMATION) ExLockUserBuffer( SystemInformation, SystemInformationLength, &LockVariable);
if (PoolInfo == NULL) {
return( STATUS_ACCESS_VIOLATION );
}
MmLockPagableSectionByHandle (ExPageLockHandle);
try {
Status = ExSnapShotPool( PoolType,PoolInfo,SystemInformationLength,Length);
}
finally {
ExUnlockUserBuffer( LockVariable );
MmUnlockPagableImageSection(ExPageLockHandle);
}
return( Status );
#else
return STATUS_NOT_IMPLEMENTED;
#endif // DBG || (i386 && !FPO)
}
NTSTATUS ExpGetHandleInformation(OUT PVOID SystemInformation,IN ULONG SystemInformationLength,OUT PULONG Length)
/*++
Routine Description:
This function returns information about the open handles in the system.
Arguments:
SystemInformation - A pointer to a buffer which receives the specified information.
SystemInformationLength - Specifies the length in bytes of the system information buffer.
Length - An optional pointer which, if specified, receives the number of bytes placed in the system information buffer.
Return Value:
Returns one of the following status codes:
STATUS_SUCCESS - normal, successful completion.
STATUS_INVALID_INFO_CLASS - The SystemInformationClass parameter did not specify a valid value.
STATUS_INFO_LENGTH_MISMATCH - The value of the SystemInformationLength parameter did not match the length required for the information class requested by the SystemInformationClass parameter.
STATUS_ACCESS_VIOLATION - Either the SystemInformation buffer pointer or the Length pointer value specified an invalid address.
STATUS_WORKING_SET_QUOTA - The process does not have sufficient working set to lock the specified output structure in memory.
STATUS_INSUFFICIENT_RESOURCES - Insufficient system resources exist for this request to complete.
--*/
{
PSYSTEM_HANDLE_INFORMATION HandleInfo;
PVOID LockVariable;
NTSTATUS Status;
PAGED_CODE();
*Length = 0;
HandleInfo = (PSYSTEM_HANDLE_INFORMATION) ExLockUserBuffer( SystemInformation, SystemInformationLength, &LockVariable);
if (HandleInfo == NULL) {
return( STATUS_ACCESS_VIOLATION );
}
try {
Status = ObGetHandleInformation( HandleInfo, SystemInformationLength, Length);
}
finally {
ExUnlockUserBuffer( LockVariable );
}
return( Status );
}
NTSTATUS ExpGetObjectInformation(OUT PVOID SystemInformation,IN ULONG SystemInformationLength,OUT PULONG Length)
/*++
Routine Description:
This function returns information about the objects in the system.
Arguments:
SystemInformation - A pointer to a buffer which receives the specified information.
SystemInformationLength - Specifies the length in bytes of the system information buffer.
Length - An optional pointer which, if specified, receives the number of bytes placed in the system information buffer.
Return Value:
Returns one of the following status codes:
STATUS_SUCCESS - normal, successful completion.
STATUS_INVALID_INFO_CLASS - The SystemInformationClass parameter did not specify a valid value.
STATUS_INFO_LENGTH_MISMATCH - The value of the SystemInformationLength parameter did not match the length required for the information class requested by the SystemInformationClass parameter.
STATUS_ACCESS_VIOLATION - Either the SystemInformation buffer pointer or the Length pointer value specified an invalid address.
STATUS_WORKING_SET_QUOTA - The process does not have sufficient working set to lock the specified output structure in memory.
STATUS_INSUFFICIENT_RESOURCES - Insufficient system resources exist for this request to complete.
--*/
{
PSYSTEM_OBJECTTYPE_INFORMATION ObjectInfo;
PVOID LockVariable;
NTSTATUS Status;
PAGED_CODE();
*Length = 0;
ObjectInfo = (PSYSTEM_OBJECTTYPE_INFORMATION) ExLockUserBuffer( SystemInformation, SystemInformationLength, &LockVariable);
if (ObjectInfo == NULL) {
return( STATUS_ACCESS_VIOLATION );
}
try {
Status = ObGetObjectInformation( SystemInformation,ObjectInfo,SystemInformationLength,Length);
}
finally {
ExUnlockUserBuffer( LockVariable );
}
return( Status );
}
extern SIZE_T PoolTrackTableSize;
extern KSPIN_LOCK ExpTaggedPoolLock;
NTSTATUS ExpGetPoolTagInfo (IN PVOID SystemInformation,IN ULONG SystemInformationLength,IN OUT PULONG ReturnLength OPTIONAL)
{
SIZE_T NumberOfBytes;
ULONG totalBytes;
ULONG i;
KIRQL OldIrql;
NTSTATUS status;
PSYSTEM_POOLTAG_INFORMATION taginfo;
PSYSTEM_POOLTAG poolTag;
PPOOL_TRACKER_TABLE PoolTrackInfo;
PAGED_CODE();
if (!PoolTrackTable) {
return STATUS_NOT_IMPLEMENTED;
}
totalBytes = 0;
status = STATUS_SUCCESS;
taginfo = (PSYSTEM_POOLTAG_INFORMATION)SystemInformation;
poolTag = &taginfo->TagInfo[0];
totalBytes = FIELD_OFFSET(SYSTEM_POOLTAG_INFORMATION, TagInfo);
taginfo->Count = 0;
// Synchronize access to PoolTrackTable as it can move.
NumberOfBytes = PoolTrackTableSize * sizeof(POOL_TRACKER_TABLE);
PoolTrackInfo = (PPOOL_TRACKER_TABLE) ExAllocatePoolWithTag (NonPagedPool,NumberOfBytes,'ofnI');
if (PoolTrackInfo == NULL) {
return STATUS_INSUFFICIENT_RESOURCES;
}
ExAcquireSpinLock(&ExpTaggedPoolLock, &OldIrql);
RtlCopyMemory ((PVOID)PoolTrackInfo,(PVOID)PoolTrackTable,NumberOfBytes);
ExReleaseSpinLock(&ExpTaggedPoolLock, OldIrql);
for (i = 0; i < NumberOfBytes / sizeof(POOL_TRACKER_TABLE); i += 1) {
if (PoolTrackInfo[i].Key != 0) {
taginfo->Count += 1;
totalBytes += sizeof (SYSTEM_POOLTAG);
if (SystemInformationLength < totalBytes) {
status = STATUS_INFO_LENGTH_MISMATCH;
} else {
poolTag->TagUlong = PoolTrackInfo[i].Key;
poolTag->PagedAllocs = PoolTrackInfo[i].PagedAllocs;
poolTag->PagedFrees = PoolTrackInfo[i].PagedFrees;
poolTag->PagedUsed = PoolTrackInfo[i].PagedBytes;
poolTag->NonPagedAllocs = PoolTrackInfo[i].NonPagedAllocs;
poolTag->NonPagedFrees = PoolTrackInfo[i].NonPagedFrees;
poolTag->NonPagedUsed = PoolTrackInfo[i].NonPagedBytes;
poolTag += 1;
}
}
}
ExFreePool (PoolTrackInfo);
if (ARGUMENT_PRESENT(ReturnLength)) {
*ReturnLength = totalBytes;
}
return status;
}
NTSTATUS ExpQueryModuleInformation(IN PLIST_ENTRY LoadOrderListHead, IN PLIST_ENTRY UserModeLoadOrderListHead, OUT PRTL_PROCESS_MODULES ModuleInformation, IN ULONG ModuleInformationLength, OUT PULONG ReturnLength OPTIONAL)
{
NTSTATUS Status;
ULONG RequiredLength;
PLIST_ENTRY Next;
PLIST_ENTRY Next1;
PRTL_PROCESS_MODULE_INFORMATION ModuleInfo;
PLDR_DATA_TABLE_ENTRY LdrDataTableEntry;
PLDR_DATA_TABLE_ENTRY LdrDataTableEntry1;
ANSI_STRING AnsiString;
PUCHAR s;
RequiredLength = FIELD_OFFSET( RTL_PROCESS_MODULES, Modules );
if (ModuleInformationLength < RequiredLength) {
Status = STATUS_INFO_LENGTH_MISMATCH;
} else {
ModuleInformation->NumberOfModules = 0;
ModuleInfo = &ModuleInformation->Modules[ 0 ];
Status = STATUS_SUCCESS;
}
Next = LoadOrderListHead->Flink;
while ( Next != LoadOrderListHead ) {
LdrDataTableEntry = CONTAINING_RECORD( Next, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
RequiredLength += sizeof( RTL_PROCESS_MODULE_INFORMATION );
if (ModuleInformationLength < RequiredLength) {
Status = STATUS_INFO_LENGTH_MISMATCH;
} else {
ModuleInfo->MappedBase = NULL;
ModuleInfo->ImageBase = LdrDataTableEntry->DllBase;
ModuleInfo->ImageSize = LdrDataTableEntry->SizeOfImage;
ModuleInfo->Flags = LdrDataTableEntry->Flags;
ModuleInfo->LoadCount = LdrDataTableEntry->LoadCount;
ModuleInfo->LoadOrderIndex = (USHORT)(ModuleInformation->NumberOfModules);
ModuleInfo->InitOrderIndex = 0;
AnsiString.Buffer = ModuleInfo->FullPathName;
AnsiString.Length = 0;
AnsiString.MaximumLength = sizeof( ModuleInfo->FullPathName );
RtlUnicodeStringToAnsiString( &AnsiString, &LdrDataTableEntry->FullDllName, FALSE);
s = AnsiString.Buffer + AnsiString.Length;
while (s > AnsiString.Buffer && *--s) {
if (*s == (UCHAR)OBJ_NAME_PATH_SEPARATOR) {
s++;
break;
}
}
ModuleInfo->OffsetToFileName = (USHORT)(s - AnsiString.Buffer);
ModuleInfo++;
}
ModuleInformation->NumberOfModules++;
Next = Next->Flink;
}
if (ARGUMENT_PRESENT( UserModeLoadOrderListHead )) {
Next = UserModeLoadOrderListHead->Flink;
while ( Next != UserModeLoadOrderListHead ) {
LdrDataTableEntry = CONTAINING_RECORD( Next, LDR_DATA_TABLE_ENTRY, InLoadOrderLinks);
RequiredLength += sizeof( RTL_PROCESS_MODULE_INFORMATION );
if (ModuleInformationLength < RequiredLength) {
Status = STATUS_INFO_LENGTH_MISMATCH;
} else {
ModuleInfo->MappedBase = NULL;
ModuleInfo->ImageBase = LdrDataTableEntry->DllBase;
ModuleInfo->ImageSize = LdrDataTableEntry->SizeOfImage;
ModuleInfo->Flags = LdrDataTableEntry->Flags;
ModuleInfo->LoadCount = LdrDataTableEntry->LoadCount;
ModuleInfo->LoadOrderIndex = (USHORT)(ModuleInformation->NumberOfModules);
ModuleInfo->InitOrderIndex = ModuleInfo->LoadOrderIndex;
AnsiString.Buffer = ModuleInfo->FullPathName;
AnsiString.Length = 0;
AnsiString.MaximumLength = sizeof( ModuleInfo->FullPathName );
RtlUnicodeStringToAnsiString( &AnsiString, &LdrDataTableEntry->FullDllName, FALSE);
s = AnsiString.Buffer + AnsiString.Length;
while (s > AnsiString.Buffer && *--s) {
if (*s == (UCHAR)OBJ_NAME_PATH_SEPARATOR) {
s++;
break;
}
}
ModuleInfo->OffsetToFileName = (USHORT)(s - AnsiString.Buffer);
ModuleInfo++;
}
ModuleInformation->NumberOfModules++;
Next = Next->Flink;
}
}
if (ARGUMENT_PRESENT(ReturnLength)) {
*ReturnLength = RequiredLength;
}
return( Status );
}
BOOLEAN ExIsProcessorFeaturePresent(ULONG ProcessorFeature)
{
BOOLEAN rv;
if ( ProcessorFeature < PROCESSOR_FEATURE_MAX ) {
rv = SharedUserData->ProcessorFeatures[ProcessorFeature];
}
else {
rv = FALSE;
}
return rv;
}
NTSTATUS ExpQueryLegacyDriverInformation(IN PSYSTEM_LEGACY_DRIVER_INFORMATION LegacyInfo, IN PULONG Length)
/*++
Routine Description:
Returns legacy driver information for figuring out why PNP/Power functionality is disabled.
Arguments:
LegacyInfo - Returns the legacy driver information
Length - Supplies the length of the LegacyInfo buffer Returns the amount of data written
Return Value:
NTSTATUS
--*/
{
PNP_VETO_TYPE VetoType;
PWSTR VetoList = NULL;
NTSTATUS Status;
UNICODE_STRING String;
ULONG ReturnLength;
Status = IoGetLegacyVetoList(&VetoList, &VetoType);
if (!NT_SUCCESS(Status)) {
return(Status);
}
RtlInitUnicodeString(&String, VetoList);
ReturnLength = sizeof(SYSTEM_LEGACY_DRIVER_INFORMATION) + String.Length;
if (ReturnLength > *Length) {
Status = STATUS_BUFFER_OVERFLOW;
} else {
try {
LegacyInfo->VetoType = VetoType;
LegacyInfo->VetoList.Length = String.Length;
LegacyInfo->VetoList.Buffer = (PWSTR)(LegacyInfo+1);
RtlCopyMemory(LegacyInfo+1, String.Buffer, String.Length);
} finally {
if (VetoList) {
ExFreePool(VetoList);
}
}
}
*Length = ReturnLength;
return(Status);
}
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