#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for events.c:

Classes
struct	_SYS_BUTTON_CONTEXT

Macros
#define	NDEBUG

Typedefs
typedef struct _SYS_BUTTON_CONTEXT	SYS_BUTTON_CONTEXT

typedef struct _SYS_BUTTON_CONTEXT *	PSYS_BUTTON_CONTEXT

Functions
static VOID NTAPI	PopGetSysButton (IN PDEVICE_OBJECT DeviceObject, IN PVOID Context)

VOID NTAPI	PoNotifySystemTimeSet (VOID)

static NTSTATUS NTAPI	PopGetSysButtonCompletion (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp, IN PVOID Context)

NTSTATUS NTAPI	PopAddRemoveSysCapsCallback (IN PVOID NotificationStructure, IN PVOID Context)

Variables
PKWIN32_POWEREVENT_CALLOUT	PopEventCallout

PCALLBACK_OBJECT	SetSystemTimeCallback

Macro Definition Documentation

◆ NDEBUG

#define NDEBUG

Definition at line 12 of file events.c.

Typedef Documentation

◆ PSYS_BUTTON_CONTEXT

typedef struct _SYS_BUTTON_CONTEXT * PSYS_BUTTON_CONTEXT

◆ SYS_BUTTON_CONTEXT

typedef struct _SYS_BUTTON_CONTEXT SYS_BUTTON_CONTEXT

Function Documentation

◆ PoNotifySystemTimeSet()

VOID NTAPI PoNotifySystemTimeSet ( VOID )

Definition at line 39 of file events.c.

{
    KIRQL OldIrql;
 
    /* Check if Win32k registered a notification callback */
    if (PopEventCallout)
    {
        /* Raise to dispatch */
        KeRaiseIrql(DISPATCH_LEVEL, &OldIrql);
 
        /* Notify the callback */
        ExNotifyCallback(SetSystemTimeCallback, NULL, NULL);
 
        /* Lower IRQL back */
        KeLowerIrql(OldIrql);
    }
}

Referenced by ExpSetTimeZoneInformation(), NtSetSystemTime(), and Phase1InitializationDiscard().

◆ PopAddRemoveSysCapsCallback()

NTSTATUS NTAPI PopAddRemoveSysCapsCallback	(	IN PVOID	NotificationStructure,
		IN PVOID	Context
	)

Definition at line 147 of file events.c.

{
    PDEVICE_INTERFACE_CHANGE_NOTIFICATION Notification;
    PSYS_BUTTON_CONTEXT SysButtonContext;
    OBJECT_ATTRIBUTES ObjectAttributes;
    HANDLE FileHandle;
    PDEVICE_OBJECT DeviceObject;
    PFILE_OBJECT FileObject;
    PIRP Irp;
    IO_STATUS_BLOCK IoStatusBlock;
    KEVENT Event;
    BOOLEAN Arrival;
    ULONG Caps;
    NTSTATUS Status;
 
    DPRINT("PopAddRemoveSysCapsCallback(%p %p)\n",
        NotificationStructure, Context);
 
    Notification = (PDEVICE_INTERFACE_CHANGE_NOTIFICATION)NotificationStructure;
    if (Notification->Version != 1)
        return STATUS_REVISION_MISMATCH;
    if (Notification->Size != sizeof(DEVICE_INTERFACE_CHANGE_NOTIFICATION))
        return STATUS_INVALID_PARAMETER;
    if (RtlCompareMemory(&Notification->Event, &GUID_DEVICE_INTERFACE_ARRIVAL, sizeof(GUID)) == sizeof(GUID))
        Arrival = TRUE;
    else if (RtlCompareMemory(&Notification->Event, &GUID_DEVICE_INTERFACE_REMOVAL, sizeof(GUID)) == sizeof(GUID))
        Arrival = FALSE;
    else
        return STATUS_INVALID_PARAMETER;
 
    if (Arrival)
    {
        DPRINT("Arrival of %wZ\n", Notification->SymbolicLinkName);
 
        /* Open the device */
        InitializeObjectAttributes(&ObjectAttributes,
                                   Notification->SymbolicLinkName,
                                   OBJ_KERNEL_HANDLE,
                                   NULL,
                                   NULL);
        Status = ZwOpenFile(&FileHandle,
                            FILE_READ_DATA,
                            &ObjectAttributes,
                            &IoStatusBlock,
                            FILE_SHARE_READ | FILE_SHARE_WRITE,
                            0);
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("ZwOpenFile() failed with status 0x%08lx\n", Status);
            return Status;
        }
        Status = ObReferenceObjectByHandle(FileHandle,
                                           FILE_READ_DATA,
                                           IoFileObjectType,
                                           KernelMode,
                                           (PVOID*)&FileObject,
                                           NULL);
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("ObReferenceObjectByHandle() failed with status 0x%08lx\n", Status);
            ZwClose(FileHandle);
            return Status;
        }
        DeviceObject = IoGetRelatedDeviceObject(FileObject);
        ObDereferenceObject(FileObject);
 
        /* Get capabilities (IOCTL_GET_SYS_BUTTON_CAPS) */
        KeInitializeEvent(&Event, NotificationEvent, FALSE);
        Irp = IoBuildDeviceIoControlRequest(IOCTL_GET_SYS_BUTTON_CAPS,
                                            DeviceObject,
                                            NULL,
                                            0,
                                            &Caps,
                                            sizeof(Caps),
                                            FALSE,
                                            &Event,
                                            &IoStatusBlock);
        if (!Irp)
        {
            DPRINT1("IoBuildDeviceIoControlRequest() failed\n");
            ZwClose(FileHandle);
            return STATUS_INSUFFICIENT_RESOURCES;
        }
        Status = IoCallDriver(DeviceObject, Irp);
        if (Status == STATUS_PENDING)
        {
            DPRINT("IOCTL_GET_SYS_BUTTON_CAPS pending\n");
            KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
            Status = IoStatusBlock.Status;
        }
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("Sending IOCTL_GET_SYS_BUTTON_CAPS failed with status 0x%08x\n", Status);
            ZwClose(FileHandle);
            return STATUS_INSUFFICIENT_RESOURCES;
        }
 
        DPRINT("Device capabilities: 0x%x\n", Caps);
        if (Caps & SYS_BUTTON_POWER)
        {
            DPRINT("POWER button present\n");
            PopCapabilities.PowerButtonPresent = TRUE;
        }
 
        if (Caps & SYS_BUTTON_SLEEP)
        {
            DPRINT("SLEEP button present\n");
            PopCapabilities.SleepButtonPresent = TRUE;
        }
 
        if (Caps & SYS_BUTTON_LID)
        {
            DPRINT("LID present\n");
            PopCapabilities.LidPresent = TRUE;
        }
 
        SysButtonContext = ExAllocatePoolWithTag(NonPagedPool,
                                                 sizeof(SYS_BUTTON_CONTEXT),
                                                 'IWOP');
        if (!SysButtonContext)
        {
            DPRINT1("ExAllocatePoolWithTag() failed\n");
            ZwClose(FileHandle);
            return STATUS_INSUFFICIENT_RESOURCES;
        }
 
        /* Queue a work item to get sys button event */
        SysButtonContext->WorkItem = IoAllocateWorkItem(DeviceObject);
        SysButtonContext->DeviceObject = DeviceObject;
        if (!SysButtonContext->WorkItem)
        {
            DPRINT1("IoAllocateWorkItem() failed\n");
            ZwClose(FileHandle);
            ExFreePoolWithTag(SysButtonContext, 'IWOP');
            return STATUS_INSUFFICIENT_RESOURCES;
        }
        IoQueueWorkItem(SysButtonContext->WorkItem,
                        PopGetSysButton,
                        DelayedWorkQueue,
                        SysButtonContext);
 
        ZwClose(FileHandle);
        return STATUS_SUCCESS;
    }
    else
    {
        DPRINT1("Removal of a power capable device not implemented\n");
        return STATUS_NOT_IMPLEMENTED;
    }
}

Referenced by PoInitSystem().

◆ PopGetSysButton()

static VOID NTAPI PopGetSysButton	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PVOID	Context
	)

static

Definition at line 107 of file events.c.

{
    PSYS_BUTTON_CONTEXT SysButtonContext = Context;
    PIO_WORKITEM CurrentWorkItem = SysButtonContext->WorkItem;
    PIRP Irp;
 
    /* Get button pressed (IOCTL_GET_SYS_BUTTON_EVENT) */
    KeInitializeEvent(&SysButtonContext->Event, NotificationEvent, FALSE);
    Irp = IoBuildDeviceIoControlRequest(IOCTL_GET_SYS_BUTTON_EVENT,
                                        DeviceObject,
                                        NULL,
                                        0,
                                        &SysButtonContext->SysButton,
                                        sizeof(SysButtonContext->SysButton),
                                        FALSE,
                                        &SysButtonContext->Event,
                                        &SysButtonContext->IoStatusBlock);
    if (Irp)
    {
        IoSetCompletionRoutine(Irp,
                               PopGetSysButtonCompletion,
                               SysButtonContext,
                               TRUE,
                               FALSE,
                               FALSE);
        IoCallDriver(DeviceObject, Irp);
    }
    else
    {
        DPRINT1("IoBuildDeviceIoControlRequest() failed\n");
        ExFreePoolWithTag(SysButtonContext, 'IWOP');
    }
 
    IoFreeWorkItem(CurrentWorkItem);
}

Referenced by PopAddRemoveSysCapsCallback().

◆ PopGetSysButtonCompletion()

static NTSTATUS NTAPI PopGetSysButtonCompletion	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PIRP	Irp,
		IN PVOID	Context
	)

static

Definition at line 59 of file events.c.

{
    PSYS_BUTTON_CONTEXT SysButtonContext = Context;
    ULONG SysButton;
 
    /* The DeviceObject can be NULL, so use the one we stored */
    DeviceObject = SysButtonContext->DeviceObject;
 
    /* FIXME: What do do with the sys button event? */
    SysButton = *(PULONG)Irp->AssociatedIrp.SystemBuffer;
    {
        DPRINT1("A device reported the event 0x%x (", SysButton);
        if (SysButton & SYS_BUTTON_POWER) DbgPrint(" POWER");
        if (SysButton & SYS_BUTTON_SLEEP) DbgPrint(" SLEEP");
        if (SysButton & SYS_BUTTON_LID) DbgPrint(" LID");
        if (SysButton == 0) DbgPrint(" WAKE");
        DbgPrint(" )\n");
 
        if (SysButton & SYS_BUTTON_POWER)
        {
            /* FIXME: Read registry for the action we should perform here */
            DPRINT1("Initiating shutdown after power button event\n");
 
            ZwShutdownSystem(ShutdownNoReboot);
        }
    }
 
    /* Allocate a new workitem to send the next IOCTL_GET_SYS_BUTTON_EVENT */
    SysButtonContext->WorkItem = IoAllocateWorkItem(DeviceObject);
    if (!SysButtonContext->WorkItem)
    {
        DPRINT("IoAllocateWorkItem() failed\n");
        ExFreePoolWithTag(SysButtonContext, 'IWOP');
        return STATUS_SUCCESS;
    }
    IoQueueWorkItem(SysButtonContext->WorkItem,
                    PopGetSysButton,
                    DelayedWorkQueue,
                    SysButtonContext);
 
    return STATUS_SUCCESS /* STATUS_CONTINUE_COMPLETION */;
}

Referenced by PopGetSysButton().

Variable Documentation

◆ PopEventCallout

PKWIN32_POWEREVENT_CALLOUT PopEventCallout

Definition at line 32 of file events.c.

Referenced by PoNotifySystemTimeSet(), and PsEstablishWin32Callouts().

◆ SetSystemTimeCallback

PCALLBACK_OBJECT SetSystemTimeCallback

extern

Definition at line 27 of file callback.c.

Referenced by PoNotifySystemTimeSet().

Classes

Macros

Typedefs

Functions

Variables