ULONG SymGetSymbolCount(void)
{
ASSERTMSG("SymbolEngine must be initialized prior to this call", bIsSymEngineInitialized == TRUE);
// immediately acquire mutex, because of current count query
ASSERTMSG("Fast mutex acquire must occur at or below APC_LEVEL", KeGetCurrentIrql() <= APC_LEVEL);
ExAcquireFastMutex(&SymbolsListMutex);
if(uSymbolCount != 0)
{
ASSERTMSG("Fast mutex release must occur at APC_LEVEL", KeGetCurrentIrql() == APC_LEVEL);
ExReleaseFastMutex(&SymbolsListMutex);
return uSymbolCount;
}
PLIST_ENTRY symbolListEntry = SymbolsListHead.Flink;
ULONG uTmpSymbolCount = 0;
// iterate through symbols list
while(symbolListEntry != &SymbolsListHead)
{
++uTmpSymbolCount;
symbolListEntry = symbolListEntry->Flink;
}
// release the spinlock and return the count
uSymbolCount = uTmpSymbolCount;
ASSERTMSG("Fast mutex release must occur at APC_LEVEL", KeGetCurrentIrql() == APC_LEVEL);
ExReleaseFastMutex(&SymbolsListMutex);
return uTmpSymbolCount;
}
BOOLEAN SymUpdateSymbol(IN PINTERNAL_SYMBOL pSymbol)
{
ASSERTMSG("Passed symbol cannot be NULL", pSymbol != NULL);
ASSERTMSG("SymbolEngine must be initialized prior to this call", bIsSymEngineInitialized == TRUE);
PSYMBOL_ENTRY pWantedSymbol = SympFindSymbol(pSymbol->name);
ASSERTMSG("Fast mutex acquire must occur at or below APC_LEVEL", KeGetCurrentIrql() <= APC_LEVEL);
ExAcquireFastMutex(&SymbolsListMutex);
if(pWantedSymbol == NULL)
{
KdPrint(("[DEBUG] ERROR - %s private symbol does not exist!\n", pSymbol->name));
ASSERTMSG("Fast mutex release must occur at APC_LEVEL", KeGetCurrentIrql() == APC_LEVEL);
ExReleaseFastMutex(&SymbolsListMutex);
return FALSE;
}
// update all symbol fields
pWantedSymbol->Symbol.u64address = pSymbol->u64address;
pWantedSymbol->Symbol.uOffset = pSymbol->uOffset;
pWantedSymbol->Symbol.uBitPosition = pSymbol->uBitPosition;
pWantedSymbol->Symbol.uBitLength = pSymbol->uBitLength;
ASSERTMSG("Fast mutex release must occur at APC_LEVEL", KeGetCurrentIrql() == APC_LEVEL);
ExReleaseFastMutex(&SymbolsListMutex);
return TRUE;
}
_Use_decl_annotations_
NTSTATUS NotificationCopy(
PVOID Buffer,
ULONG BufferSize,
PULONG BytesRead
)
{
PLIST_ENTRY pListEntry;
PNOTIFICATION_ENTRY pEntry;
if (BufferSize < sizeof(OBSERVER_NOTIFICATION))
{
return STATUS_BUFFER_TOO_SMALL;
}
ExAcquireFastMutex(&NotificationListMutex);
if (IsListEmpty(&NotificationList))
{
ExReleaseFastMutex(&NotificationListMutex);
*BytesRead = 0;
return STATUS_MORE_PROCESSING_REQUIRED;
}
pListEntry = RemoveHeadList(&NotificationList);
ExReleaseFastMutex(&NotificationListMutex);
pEntry = CONTAINING_RECORD(pListEntry, NOTIFICATION_ENTRY, ListEntry);
RtlCopyMemory(Buffer, &pEntry->Data, sizeof(OBSERVER_NOTIFICATION));
*BytesRead = sizeof(OBSERVER_NOTIFICATION);
NOTIFICATION_FREE(pEntry);
return STATUS_SUCCESS;
}
PVOID
ExAllocateFromPagedLookasideList(
IN PPAGED_LOOKASIDE_LIST Lookaside
)
/*++
Routine Description:
This function removes (pops) the first entry from the specified
paged lookaside list.
Arguments:
Lookaside - Supplies a pointer to a paged lookaside list structure.
Return Value:
If an entry is removed from the specified lookaside list, then the
address of the entry is returned as the function value. Otherwise,
NULL is returned.
--*/
{
PVOID Entry;
Lookaside->L.TotalAllocates += 1;
if (Isx86FeaturePresent(KF_CMPXCHG8B)) {
if ((Entry = ExInterlockedPopEntrySList(&Lookaside->L.ListHead,
NULL)) == NULL) {
Lookaside->L.AllocateMisses += 1;
Entry = (Lookaside->L.Allocate)(Lookaside->L.Type,
Lookaside->L.Size,
Lookaside->L.Tag);
}
return Entry;
}
ExAcquireFastMutex(&Lookaside->Lock);
Entry = PopEntryList(&Lookaside->L.ListHead.Next);
if (Entry == NULL) {
ExReleaseFastMutex(&Lookaside->Lock);
Lookaside->L.AllocateMisses += 1;
Entry = (Lookaside->L.Allocate)(Lookaside->L.Type,
Lookaside->L.Size,
Lookaside->L.Tag);
} else {
Lookaside->L.ListHead.Depth -= 1;
ExReleaseFastMutex(&Lookaside->Lock);
}
return Entry;
}
VOID
ExFreeToPagedLookasideList(
IN PPAGED_LOOKASIDE_LIST Lookaside,
IN PVOID Entry
)
/*++
Routine Description:
This function inserts (pushes) the specified entry into the specified
paged lookaside list.
Arguments:
Lookaside - Supplies a pointer to a paged lookaside list structure.
Entry - Supples a pointer to the entry that is inserted in the
lookaside list.
Return Value:
None.
--*/
{
Lookaside->L.TotalFrees += 1;
if (Isx86FeaturePresent(KF_CMPXCHG8B)) {
if (ExQueryDepthSList(&Lookaside->L.ListHead) >= Lookaside->L.Depth) {
Lookaside->L.FreeMisses += 1;
(Lookaside->L.Free)(Entry);
} else {
ExInterlockedPushEntrySList(&Lookaside->L.ListHead,
(PSINGLE_LIST_ENTRY)Entry,
NULL);
}
return;
}
ExAcquireFastMutex(&Lookaside->Lock);
if (ExQueryDepthSList(&Lookaside->L.ListHead) >= Lookaside->L.Depth) {
ExReleaseFastMutex(&Lookaside->Lock);
Lookaside->L.FreeMisses += 1;
(Lookaside->L.Free)(Entry);
} else {
PushEntryList(&Lookaside->L.ListHead.Next, (PSINGLE_LIST_ENTRY)Entry);
Lookaside->L.ListHead.Depth += 1;
ExReleaseFastMutex(&Lookaside->Lock);
}
return;
}
VOID LockLcxlMutexRead(PMultiReadMutex pMutex)//加锁读互斥
{
ExAcquireFastMutex(&pMutex->z);
ExAcquireFastMutex(&pMutex->kReadMutex);
if (pMutex->iReadCount == 0) {
KeWaitForSingleObject(&pMutex->kRWMutex, Executive, KernelMode, FALSE, NULL);
}
pMutex->iReadCount++;
ExReleaseFastMutex(&pMutex->kReadMutex);
ExReleaseFastMutex(&pMutex->z);
}
PNDAS_CCB
ReadonlyLookUpCcbByReadonlyFileObject (
IN PFILESPY_DEVICE_EXTENSION DevExt,
IN PFILE_OBJECT ReadonlyFileObject
)
{
PNDAS_CCB ccb = NULL;
PLIST_ENTRY listEntry;
ExAcquireFastMutex( &DevExt->LfsDeviceExt.Readonly->CcbQMutex );
for (listEntry = DevExt->LfsDeviceExt.Readonly->CcbQueue.Flink;
listEntry != &DevExt->LfsDeviceExt.Readonly->CcbQueue;
listEntry = listEntry->Flink) {
ccb = CONTAINING_RECORD( listEntry, NDAS_CCB, ListEntry );
if (ccb->ReadonlyFileObject == ReadonlyFileObject)
break;
ccb = NULL;
}
ExReleaseFastMutex( &DevExt->LfsDeviceExt.Readonly->CcbQMutex );
return ccb;
}
PNDAS_CCB
ReadonlyLookUpCcb (
IN PREADONLY Readonly,
IN PFILE_OBJECT FileObject
)
{
PNDAS_CCB ccb = NULL;
PLIST_ENTRY listEntry;
ExAcquireFastMutex( &Readonly->CcbQMutex );
for (listEntry = Readonly->CcbQueue.Flink;
listEntry != &Readonly->CcbQueue;
listEntry = listEntry->Flink) {
ccb = CONTAINING_RECORD( listEntry, NDAS_CCB, ListEntry );
if (ccb->FileObject == FileObject)
break;
ccb = NULL;
}
ExReleaseFastMutex( &Readonly->CcbQMutex );
return ccb;
}
VOID
ReadonlyFreeCcb (
IN PFILESPY_DEVICE_EXTENSION DevExt,
IN PNDAS_CCB Ccb
)
{
PLIST_ENTRY listEntry;
ASSERT( Ccb->ListEntry.Flink == Ccb->ListEntry.Blink );
ExAcquireFastMutex( &DevExt->LfsDeviceExt.Readonly->CcbQMutex );
for (listEntry = DevExt->LfsDeviceExt.Readonly->CcbQueue.Flink;
listEntry != &DevExt->LfsDeviceExt.Readonly->CcbQueue;
listEntry = listEntry->Flink) {
PNDAS_CCB childCcb;
childCcb = CONTAINING_RECORD( listEntry, NDAS_CCB, ListEntry );
if (childCcb->CreateContext.RelatedFileHandle == Ccb->ReadonlyFileHandle)
childCcb->RelatedFileObjectClosed = TRUE;
}
ExReleaseFastMutex( &DevExt->LfsDeviceExt.Readonly->CcbQMutex );
InterlockedDecrement( &DevExt->LfsDeviceExt.Readonly->CcbCount );
ExFreePoolWithTag( Ccb, LFS_CCB_TAG );
}
//
// Find a thread exemption in the list of exemptions and return its pointer
//
PTHREAD_EXEMPTION FindThreadExemption(
IN PVOID Thread,
IN BOOLEAN LockList)
{
PTHREAD_EXEMPTION Exemption = NULL;
PLIST_ENTRY Current;
if (LockList)
ExAcquireFastMutex(
&ThreadExemptionListMutex);
for (Current = ThreadExemptionList.Flink;
Current != &ThreadExemptionList;
Current = Current->Flink)
{
PTHREAD_EXEMPTION CurrentExemption = (PTHREAD_EXEMPTION)Current;
//
// If the current entry's thread matches the one that is requested, return
// its pointer
//
if (CurrentExemption->Thread == Thread)
{
Exemption = CurrentExemption;
break;
}
}
if (LockList)
ExReleaseFastMutex(
&ThreadExemptionListMutex);
return Exemption;
}
static NTSTATUS CfixkrsRegisterChildThreadFilament(
__in PCFIXKRP_FILAMENT Filament,
__in HANDLE Thread
)
{
NTSTATUS Status;
ASSERT( Filament );
ASSERT( Thread );
ASSERT( KeGetCurrentIrql() == PASSIVE_LEVEL );
ExAcquireFastMutex( &Filament->ChildThreads.Lock );
if ( Filament->ChildThreads.ThreadCount ==
_countof( Filament->ChildThreads.Threads ) )
{
Status = STATUS_ALLOTTED_SPACE_EXCEEDED;
goto Cleanup;
}
Filament->ChildThreads.Threads[
Filament->ChildThreads.ThreadCount++ ] = Thread;
Status = STATUS_SUCCESS;
Cleanup:
ExReleaseFastMutex( &Filament->ChildThreads.Lock );
return Status;
}
static VOID
XenvbdTargetStop(ULONG target_id)
{
PXHBD_TARGET_INFO targetInfo;
KIRQL irql;
TraceNotice(("target %d: %s\n", target_id, __FUNCTION__));
irql = acquire_irqsafe_lock(XenvbdTargetInfoLock);
targetInfo = XenvbdTargetInfo[target_id];
XM_ASSERT(targetInfo != NULL);
targetInfo->References++;
release_irqsafe_lock(XenvbdTargetInfoLock, irql);
XM_ASSERT(KeGetCurrentIrql() < DISPATCH_LEVEL);
ExAcquireFastMutex(&targetInfo->StateLock);
targetInfo->Started = FALSE;
ExReleaseFastMutex(&targetInfo->StateLock);
irql = acquire_irqsafe_lock(XenvbdTargetInfoLock);
XM_ASSERT(targetInfo->References != 0);
targetInfo->References--;
release_irqsafe_lock(XenvbdTargetInfoLock, irql);
}
//
// Increment the reference count to a PDO.
//
PPDO_DEVICE_DATA
LookupPdoData(
PFDO_DEVICE_DATA FdoData,
ULONG SystemIoBusNumber
)
{
PPDO_DEVICE_DATA pdoData = NULL;
PLIST_ENTRY entry;
PAGED_CODE ();
KeEnterCriticalRegion();
ExAcquireFastMutex (&FdoData->Mutex);
for (entry = FdoData->ListOfPDOs.Flink;
entry != &FdoData->ListOfPDOs;
entry = entry->Flink) {
pdoData = CONTAINING_RECORD (entry, PDO_DEVICE_DATA, Link);
if(pdoData->SlotNo == SystemIoBusNumber)
break;
pdoData = NULL;
}
if(pdoData) {
//
// increment the reference count to the PDO.
//
ObReferenceObject(pdoData->Self);
}
ExReleaseFastMutex (&FdoData->Mutex);
KeLeaveCriticalRegion();
return pdoData;
}
NTSTATUS
NTAPI
CompBattDisableStatusNotify(IN PCOMPBATT_DEVICE_EXTENSION DeviceExtension)
{
PCOMPBATT_BATTERY_DATA BatteryData;
PLIST_ENTRY ListHead, NextEntry;
if (CompBattDebug & 0x100) DbgPrint("CompBatt: ENTERING DisableStatusNotify\n");
/* Loop the battery list */
ExAcquireFastMutex(&DeviceExtension->Lock);
ListHead = &DeviceExtension->BatteryList;
NextEntry = ListHead->Flink;
while (NextEntry != ListHead)
{
/* Get the battery information and clear capacity data */
BatteryData = CONTAINING_RECORD(NextEntry, COMPBATT_BATTERY_DATA, BatteryLink);
BatteryData->WaitStatus.LowCapacity = 0;
BatteryData->WaitStatus.HighCapacity = 0x7FFFFFFF;
NextEntry = NextEntry->Flink;
}
/* Done */
ExReleaseFastMutex(&DeviceExtension->Lock);
if (CompBattDebug & 0x100) DbgPrint("CompBatt: EXITING DisableStatusNotify\n");
return STATUS_SUCCESS;
}
BOOLEAN SymRemoveSymbol(IN PCHAR pszSymbolName)
{
ASSERTMSG("Passed symbol name is NULL", pszSymbolName != NULL);
ASSERTMSG("SymbolEngine must be initialized prior to this call", bIsSymEngineInitialized == TRUE);
// try to find the symbol to remove
PSYMBOL_ENTRY pSymbolEntry = SympFindSymbol(pszSymbolName);
// if symbol not found, return NULL
if(pSymbolEntry == NULL)
{
return FALSE;
}
// symbol found, so we remove it from the list...
ASSERTMSG("Fast mutex acquire must occur at or below APC_LEVEL", KeGetCurrentIrql() <= APC_LEVEL);
ExAcquireFastMutex(&SymbolsListMutex);
RemoveEntryList(&pSymbolEntry->ListEntry);
// decrease symbol count (do it inside guarded block!)
--uSymbolCount;
// and free allocated memory
ExFreeToNPagedLookasideList(&SymbolsLookasideList, pSymbolEntry);
ASSERTMSG("Fast mutex release must occur at APC_LEVEL", KeGetCurrentIrql() == APC_LEVEL);
ExReleaseFastMutex(&SymbolsListMutex);
return TRUE;
}
NTSTATUS CfixkrpJoinChildThreadsFilament(
__in PCFIXKRP_FILAMENT Filament,
__in_opt PLARGE_INTEGER Timeout
)
{
NTSTATUS Status;
ASSERT( KeGetCurrentIrql() == PASSIVE_LEVEL );
ExAcquireFastMutex( &Filament->ChildThreads.Lock );
if ( Filament->ChildThreads.ThreadCount > 0 )
{
KWAIT_BLOCK WaitBlocks[ CFIX_MAX_THREADS ];
Status = KeWaitForMultipleObjects(
Filament->ChildThreads.ThreadCount,
Filament->ChildThreads.Threads,
WaitAll,
Executive,
KernelMode,
FALSE,
Timeout,
WaitBlocks );
}
else
{
Status = STATUS_SUCCESS;
}
ExReleaseFastMutex( &Filament->ChildThreads.Lock );
return Status;
}
NTSTATUS
NTAPI
BeepClose(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
/* Acquire the mutex and decrease reference count */
ExAcquireFastMutex(&DeviceExtension->Mutex);
if (!(--DeviceExtension->ReferenceCount))
{
/* Check for active timer */
if (DeviceExtension->TimerActive)
{
/* Cancel it */
if (KeCancelTimer(&DeviceExtension->Timer))
{
/* Mark it as cancelled */
InterlockedDecrement(&DeviceExtension->TimerActive);
}
}
/* Page the driver */
MmUnlockPagableImageSection(DeviceExtension->SectionHandle);
}
/* Release the lock */
ExReleaseFastMutex(&DeviceExtension->Mutex);
/* Complete the request */
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
PLFS_CCB
Secondary_LookUpCcb (
IN PSECONDARY Secondary,
IN PFILE_OBJECT FileObject
)
{
PLFS_CCB ccb = NULL;
PLIST_ENTRY listEntry;
ExAcquireFastMutex( &Secondary->CcbQMutex );
for (listEntry = Secondary->CcbQueue.Flink;
listEntry != &Secondary->CcbQueue;
listEntry = listEntry->Flink) {
ccb = CONTAINING_RECORD( listEntry, LFS_CCB, ListEntry );
if (ccb->FileObject == FileObject) {
break;
}
ccb = NULL;
}
ExReleaseFastMutex( &Secondary->CcbQMutex );
return ccb;
}
VOID
FreeCcb (
IN PSECONDARY Secondary,
IN PLFS_CCB Ccb
)
{
PLIST_ENTRY listEntry;
ASSERT( Ccb->ListEntry.Flink == Ccb->ListEntry.Blink );
ExAcquireFastMutex( &Secondary->CcbQMutex );
for (listEntry = Secondary->CcbQueue.Flink;
listEntry != &Secondary->CcbQueue;
listEntry = listEntry->Flink) {
PLFS_CCB childCcb;
childCcb = CONTAINING_RECORD( listEntry, LFS_CCB, ListEntry );
if (childCcb->CreateContext.RelatedFileHandle == Ccb->PrimaryFileHandle)
childCcb->RelatedFileObjectClosed = TRUE;
}
ExReleaseFastMutex( &Secondary->CcbQMutex );
InterlockedDecrement( &Secondary->CcbCount );
ExFreePoolWithTag( Ccb, LFS_CCB_TAG );
}
static void hook_dump_entry()
{
PLDR_DATA_TABLE_ENTRY table;
entry_hook *ehook;
ExAcquireFastMutex(&dump_sync);
if (dump_imgbase != NULL && (table = find_image(dump_imgbase)))
{
if (table->BaseDllName.Buffer != NULL && table->EntryPoint != NULL &&
img_cmp(&table->BaseDllName, L"dump_") || img_cmp(&table->BaseDllName, L"hiber_"))
{
if (ehook = mm_alloc(sizeof(entry_hook), 0))
{
memcpy(ehook->code, jmp_code, sizeof(jmp_code));
ppv(ehook->code + DEST_OFF)[0] = dump_driver_entry;
ppv(ehook->code + PARM_OFF)[0] = ehook;
ehook->old_entry = table->EntryPoint;
table->EntryPoint = pv(ehook->code);
}
}
dump_imgbase = NULL;
}
ExReleaseFastMutex(&dump_sync);
}
NTSTATUS bus_get_ports_status(ioctl_usbvbus_get_ports_status * st,
PFDO_DEVICE_DATA fdodata, ULONG *info)
{
PDEVICE_OBJECT pdo;
PPDO_DEVICE_DATA pdodata;
NTSTATUS status;
PLIST_ENTRY entry;
PAGED_CODE ();
Bus_KdPrint (fdodata, BUS_DBG_PNP_INFO,
("get ports status\n"));
RtlZeroMemory(st, sizeof(*st));
ExAcquireFastMutex (&fdodata->Mutex);
for (entry = fdodata->ListOfPDOs.Flink;
entry != &fdodata->ListOfPDOs;
entry = entry->Flink) {
pdodata = CONTAINING_RECORD (entry, PDO_DEVICE_DATA, Link);
if (pdodata->SerialNo > 127 || pdodata->SerialNo == 0){
KdPrint(("strange error"));
}
if(st->max_used_port < (int)pdodata->SerialNo)
st->max_used_port = (int)pdodata->SerialNo;
st->port_status[pdodata->SerialNo]=1;
}
ExReleaseFastMutex (&fdodata->Mutex);
*info=sizeof(*st);
return STATUS_SUCCESS;
}
//.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- SetIntClkFreq -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
//
static NTSTATUS SetIntClkFreq(
IN Channel* pChannel,
IN Int64 frequency) // dHz
{
Dta1xxSpiGen* pSpiReg; // Pointer to SPI general register block
#if LOG_LEVEL_SPI > 1
DTA1XX_LOG(KERN_INFO, "[%d] SetIntClkFreq: frequency %ld", pChannel->m_PortIndex, (long int)frequency);
#endif
// Check parameter
if ((frequency < 0) || (frequency > 1890000000LL)) {
DTA1XX_LOG(KERN_INFO,
"[%d] SetIntClkFreq: invalid parameter frequency %ld",
pChannel->m_PortIndex, (long int)frequency);
return STATUS_INVALID_PARAMETER;
}
// Get pointer
pSpiReg = pChannel->m_pSpiReg;
// Set DSS
ExAcquireFastMutex(&pChannel->m_DssMutex); // Protect access to DSS
pChannel->m_DssFreq = DssFrequency(pSpiReg,(UInt32)frequency); // Set frequency
DssUpdate(pSpiReg); // update DSS
ExReleaseFastMutex(&pChannel->m_DssMutex); // Release access to DSS
return STATUS_SUCCESS;
} // SetIntClkFreq()
static VOID
XenvbdTargetStart(ULONG target_id, char *backend_path, SUSPEND_TOKEN token)
{
PXHBD_TARGET_INFO targetInfo;
KIRQL irql;
NTSTATUS status;
TraceNotice(("target %d: %s\n", target_id, __FUNCTION__));
irql = acquire_irqsafe_lock(XenvbdTargetInfoLock);
targetInfo = XenvbdTargetInfo[target_id];
XM_ASSERT(targetInfo != NULL);
targetInfo->References++;
release_irqsafe_lock(XenvbdTargetInfoLock, irql);
XM_ASSERT(KeGetCurrentIrql() < DISPATCH_LEVEL);
ExAcquireFastMutex(&targetInfo->StateLock);
XM_ASSERT(!targetInfo->Started);
status = PrepareBackendForReconnect(targetInfo, backend_path, token);
if (!NT_SUCCESS(status))
goto fail1;
targetInfo->Started = TRUE;
ExReleaseFastMutex(&targetInfo->StateLock);
irql = acquire_irqsafe_lock(XenvbdTargetInfoLock);
XM_ASSERT(targetInfo->References != 0);
targetInfo->References--;
release_irqsafe_lock(XenvbdTargetInfoLock, irql);
return;
fail1:
TraceError(("%s: fail1 (0x%08x)\n", __FUNCTION__, status));
ExReleaseFastMutex(&targetInfo->StateLock);
irql = acquire_irqsafe_lock(XenvbdTargetInfoLock);
XM_ASSERT(targetInfo->References != 0);
targetInfo->References--;
release_irqsafe_lock(XenvbdTargetInfoLock, irql);
}
BOOLEAN SympAddSymbol(IN PCHAR pszSymbolName, IN ULONG64 uSymbolAddress, IN ULONG uOffset, IN ULONG uBitPosition, IN ULONG uBitLength)
{
ASSERTMSG("Cannot add symbol with NULL name", pszSymbolName != NULL);
ASSERTMSG("SymbolEngine must be initialized prior to this call", bIsSymEngineInitialized == TRUE);
// it is possible that we got symbol with zero address, offset -1, bit position -1, and length -1 if the symbol was not found during
// enumeration in user mode. In that case, and only in that case, we return error!
// NOTE: uSymbolAddress of -1 is used when symbols are initialized in order to send the array of wanted symbols to the user mode
if(uSymbolAddress == 0 && uOffset == -1 && uBitPosition == -1 && uBitLength == -1)
{
KdPrint(("[DEBUG] WARNING - Symbol was probably not found in user mode, cannot add symbol with unknown address and unknown offset\n"));
return FALSE;
}
// if symbol with this name already exists
if(SympFindSymbol(pszSymbolName) != NULL)
{
// don't want to "update" the address -- use SymUpdateSymbol function instead
KdPrint(("[DEBUG] WARNING - Symbol %s with address 0x%x already exists -- use SymUpdateFunction() to update the address\n", pszSymbolName, uSymbolAddress));
return TRUE;
}
// get memory from lookaside list
PSYMBOL_ENTRY pSymbolEntry = (PSYMBOL_ENTRY) ExAllocateFromNPagedLookasideList(&SymbolsLookasideList);
if(pSymbolEntry == NULL)
{
KdPrint(("[DEBUG] ERROR - Not enough memory in lookaside list to allocate new symbol entry\n"));
return FALSE;
}
// copy string from passed parameter
if(RtlStringCbCopyA(pSymbolEntry->Symbol.name, MAX_SYM_NAME, pszSymbolName) == STATUS_INVALID_PARAMETER)
{
KdPrint(("[DEBUG] ERROR - Error while copying symbol name to SYMBOL_ENTRY structure\n"));
return FALSE;
}
// copy address from the passed parameter
pSymbolEntry->Symbol.u64address = uSymbolAddress;
// copy offset from the passed parameter
pSymbolEntry->Symbol.uOffset = uOffset;
// copy bit position from the passed parameter
pSymbolEntry->Symbol.uBitPosition = uBitPosition;
// copy bit length from the passed parameter
pSymbolEntry->Symbol.uBitLength = uBitLength;
// insert it to list (thread safe)
ASSERTMSG("Fast mutex acquire must occur at or below APC_LEVEL", KeGetCurrentIrql() <= APC_LEVEL);
ExAcquireFastMutex(&SymbolsListMutex);
InsertHeadList(&SymbolsListHead, &pSymbolEntry->ListEntry);
++uSymbolCount;
ASSERTMSG("Fast mutex release must occur at APC_LEVEL", KeGetCurrentIrql() == APC_LEVEL);
ExReleaseFastMutex(&SymbolsListMutex);
return TRUE;
}
VOID
NTAPI
ExSwapinWorkerThreads(IN BOOLEAN AllowSwap)
{
KEVENT Event;
PETHREAD CurrentThread = PsGetCurrentThread(), Thread;
PEPROCESS Process = PsInitialSystemProcess;
KAPC Apc;
PAGED_CODE();
/* Initialize an event so we know when we're done */
KeInitializeEvent(&Event, NotificationEvent, FALSE);
/* Lock this routine */
ExAcquireFastMutex(&ExpWorkerSwapinMutex);
/* New threads cannot swap anymore */
ExpWorkersCanSwap = AllowSwap;
/* Loop all threads in the system process */
Thread = PsGetNextProcessThread(Process, NULL);
while (Thread)
{
/* Skip threads with explicit permission to do this */
if (Thread->ExWorkerCanWaitUser) goto Next;
/* Check if we reached ourselves */
if (Thread == CurrentThread)
{
/* Do it inline */
KeSetKernelStackSwapEnable(AllowSwap);
}
else
{
/* Queue an APC */
KeInitializeApc(&Apc,
&Thread->Tcb,
InsertApcEnvironment,
ExpSetSwappingKernelApc,
NULL,
NULL,
KernelMode,
&AllowSwap);
if (KeInsertQueueApc(&Apc, &Event, NULL, 3))
{
/* Wait for the APC to run */
KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
KeClearEvent(&Event);
}
}
/* Next thread */
Next:
Thread = PsGetNextProcessThread(Process, Thread);
}
/* Release the lock */
ExReleaseFastMutex(&ExpWorkerSwapinMutex);
}
/* adds the given swapchain to the context's swapchain list
* @return true on success */
BOOLEAN vboxWddmSwapchainCtxAdd(PVBOXMP_DEVEXT pDevExt, PVBOXWDDM_CONTEXT pContext, PVBOXWDDM_SWAPCHAIN pSwapchain)
{
BOOLEAN bRc;
ExAcquireFastMutex(&pDevExt->ContextMutex);
bRc = vboxWddmSwapchainCtxAddLocked(pDevExt, pContext, pSwapchain);
ExReleaseFastMutex(&pDevExt->ContextMutex);
return bRc;
}
VOID
PiUnload(
IN PDRIVER_OBJECT DriverObject
)
/*++
Routine Description:
This routine cleans up all of the memory associated with
any of the devices belonging to the driver.
Arguments:
DriverObject - Supplies a pointer to the driver object controling
all of the devices.
Return Value:
None.
--*/
{
PVOID lockPtr;
//
// Lock the pageable code section
//
lockPtr = MmLockPagableCodeSection(PiUnload);
ExAcquireFastMutex (&PipMutex);
ObDereferenceObject(PipBusExtension->BusHandler->DeviceObject);
//
// Delete all the device info structures and card info structures
//
PipInvalidateCards(PipBusExtension);
PipDeleteCards(PipBusExtension);
//
// Finally remove the bus handler reference.
//
HalDereferenceBusHandler (PipBusExtension->BusHandler);
ExReleaseFastMutex (&PipMutex);
//
// Unlock pageable code section
//
MmUnlockPagableImageSection(lockPtr);
}
FORCEINLINE
NTSTATUS
QueueingSecondaryRequest (
IN PSECONDARY Secondary,
IN PSECONDARY_REQUEST SecondaryRequest
)
{
NTSTATUS status;
ASSERT( SecondaryRequest->ListEntry.Flink == SecondaryRequest->ListEntry.Blink );
ExAcquireFastMutex( &Secondary->FastMutex );
if (FlagOn(Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_START) &&
!FlagOn(Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_STOPED)) {
ExInterlockedInsertTailList( &Secondary->RequestQueue,
&SecondaryRequest->ListEntry,
&Secondary->RequestQSpinLock );
ExReleaseFastMutex( &Secondary->FastMutex );
KeSetEvent( &Secondary->RequestEvent, IO_DISK_INCREMENT, FALSE );
status = STATUS_SUCCESS;
} else {
ExReleaseFastMutex( &Secondary->FastMutex );
status = STATUS_UNSUCCESSFUL;
}
if (status == STATUS_UNSUCCESSFUL) {
SecondaryRequest->ExecuteStatus = STATUS_IO_DEVICE_ERROR;
if (SecondaryRequest->Synchronous == TRUE)
KeSetEvent( &SecondaryRequest->CompleteEvent, IO_DISK_INCREMENT, FALSE );
else
DereferenceSecondaryRequest( SecondaryRequest );
}
return status;
}
VOID UnlockLcxlMutexRead(PMultiReadMutex pMutex)//解锁读互斥
{
ExAcquireFastMutex(&pMutex->kReadMutex);
pMutex->iReadCount--;
if (pMutex->iReadCount == 0) {
KeReleaseMutex(&pMutex->kRWMutex, FALSE);
}
ExReleaseFastMutex(&pMutex->kReadMutex);
}
NTSTATUS SetCipherOpts(PGUID pDiskId, ECipherAlgo Algorithm, PVOID pCipherOpts)
{
NTSTATUS status = STATUS_SUCCESS;
CipherOptsEntry *pOptsNode = NULL, *pThisNode = NULL;
ExAcquireFastMutex(&g_pCipherOptsMutex);
switch (Algorithm)
{
case ECipherAlgo_Disabled:
case ECipherAlgo_AesXts:
case ECipherAlgo_TwofishXts:
case ECipherAlgo_SerpentXts:
// Try find existing opts in a list
for (pOptsNode = g_pCipherOptsHead; pOptsNode; pOptsNode = pOptsNode->Next)
{
if (0 == memcmp(&pOptsNode->DiskId, pDiskId, sizeof(GUID)))
{
pThisNode = pOptsNode;
break;
}
}
if (!pThisNode)
{
pThisNode = ExAllocatePoolWithTag(NonPagedPoolNx, sizeof(CipherOptsEntry), CipherPoolTag);
if (pThisNode)
{
pThisNode->Next = g_pCipherOptsHead;
g_pCipherOptsHead = pThisNode;
}
else
status = STATUS_NO_MEMORY;
}
if (pThisNode)
{
memcpy(&pThisNode->DiskId, pDiskId, sizeof(GUID));
pThisNode->Algorithm = Algorithm;
switch (Algorithm)
{
case ECipherAlgo_AesXts:
case ECipherAlgo_TwofishXts:
case ECipherAlgo_SerpentXts:
memcpy(&pThisNode->Opts.Xts256, pCipherOpts, sizeof(Xts256CipherOptions));
break;
}
}
break;
default:
status = STATUS_INVALID_PARAMETER;
}
ExReleaseFastMutex(&g_pCipherOptsMutex);
return status;
}
