Kernel Functions Available to the OAL (Compact 2013)

10/16/2014

The following table shows kernel functions that the OEM adaptation layer (OAL) can use.

Programming element	Description
DeleteCriticalSection	Releases all resources used by a critical section object that is not owned.
EnterCriticalSection	Waits for ownership of the specified critical section object.
FileSystemPowerFunction	Initiates a power-up or power-down sequence for all loaded file-system drivers.
GwesPowerOffSystem	Initiates a power-down or suspend state for the device.
HookInterrupt	Registers an interrupt service routine (ISR) with the kernel, specifying a particular hardware interrupt indicated by its interrupt request (IRQ) line value.
InitializeCriticalSection	Initializes a critical section object.
InitPubKey	Initializes a public key to use for signature verification.
INTERRUPTS_OFF	Disables all interrupts.
INTERRUPTS_ON	Enables all interrupts.
LeaveCriticalSection	Releases ownership of the specified critical section object.
LoadKernelLibrary	Loads a DLL into the kernel's address space.
NKAcquireOalSpinLock	Acquires an OAL spin lock to protect shared resources.
NKCallIntChain	Determines which chained, or shared, interrupt device triggered an IRQ event.
pfnCallRing0Function	Calls an OEM adaptation layer function that must be run in ring zero.
NKCeLogData	Logs an event, if CeLog is loaded and is capturing standard data.
NKCreateStaticMapping	Creates a static virtual memory address that maps to a physical address.
NKDeleteStaticMapping	Deletes the virtual memory allocated by the NKCreateStaticMapping function.
NKFileTimeToSystemTime	Converts file time to system time format.
NKForceCleanBoot	Forces the OS to boot from a clean object store file system when called from the OEMInit function.
NKGetLastError	Returns the last error from the current thread.
NKIsSysIntrValid	Determines whether a particular interrupt identifier (SYSINTR) value is valid.
NKOutputDebugString	Writes a string to the debug monitor port.
NKPhysToVirt	Translates a physical address in memory to a virtual address.
NKrdmsr	Is a C wrapper function for the x86 RDMSR instruction.
NKReboot	Reboots the OS.
NKRegCloseKey	Releases the handle of the specified key.
NKRegCreateKeyExW	Creates a specified key.
NKRegFlushKey	Writes all the attributes of the specified open registry key into the registry.
NKRegOpenKeyExW	Opens the specified key.
NKRegQueryValueExW	Retrieves the type and data for a specified value name associated with an open registry key.
NKRegSetValueExW	Stores data in the value field of an open registry key.
NKSendInterProcessorInterrupt	Sends a platform-specific interprocessor interrupt (IPI) to the specified processor.
NKSetDataAbortHandler	Allows an OEM to replace the default abort handler on an ARM platform.
NKSetInterruptEvent	Allows an OEM to cause an artificial interrupt event.
NKSetLastError	Sets the last error for the current thread.
NKSleep	Suspends the execution of the current thread for a specified interval.
NKSystemTimeToFileTime	Converts system time to file time format.
NKVirtToPhys	Translates a virtual address to a physical address in memory.
NKwrmsr	Is a C wrapper function for the x86 WRMSR instruction.
NotifyWinUserSystem	Notifies the system that a system setting was changed.
PFN_AllocHeapMem	Is a custom allocator function for heaps.
PFN_FreeHeapMem	Is a custom deallocator function for heaps.
PowerOffSystem	Calls the kernel to do the final power-down steps before suspending the device.
SetOOMEvent	Enables enhanced memory management features of Windows Embedded Compact.
UnhookInterrupt	Deregisters an ISR with a specific hardware interrupt.
VirtualSetAttrib	Enables an OEM to change the per-page attributes for a range of virtual memory, which is usually copied from a physical location not known to the kernel.

See Also

Reference

OAL Functions