hal.h File Reference

Go to the source code of this file.

Classes
struct	_PARTITION_DESCRIPTOR
struct	_BOOT_SECTOR_INFO
struct	_PARTITION_TABLE
struct	_DISK_LAYOUT
struct	_PTE

Macros
#define	PARTITION_TABLE_OFFSET   (0x1BE / 2)
#define	BOOT_SIGNATURE_OFFSET   ((0x200 / 2) - 1)
#define	BOOT_RECORD_RESERVED   0x1BC
#define	BOOT_RECORD_SIGNATURE   0xAA55
#define	NUM_PARTITION_TABLE_ENTRIES   4
#define	GET_STARTING_SECTOR(p)
#define	GET_ENDING_S_OF_CHS(p)   ((UCHAR)(p->EndingCylinderLsb & 0x3F))
#define	GET_PARTITION_LENGTH(p)
#define	SET_PARTITION_LENGTH(p, l)

Typedefs
typedef struct _PARTITION_DESCRIPTOR	PARTITION_DESCRIPTOR
typedef struct _PARTITION_DESCRIPTOR *	PPARTITION_DESCRIPTOR
typedef struct _BOOT_SECTOR_INFO	BOOT_SECTOR_INFO
typedef struct _BOOT_SECTOR_INFO *	PBOOT_SECTOR_INFO
typedef struct _PARTITION_TABLE	PARTITION_TABLE
typedef struct _PARTITION_TABLE *	PPARTITION_TABLE
typedef struct _DISK_LAYOUT	DISK_LAYOUT
typedef struct _DISK_LAYOUT *	PDISK_LAYOUT
typedef struct _PTE	PTE
typedef struct _PTE *	PPTE

Functions
VOID FASTCALL	xHalExamineMBR (IN PDEVICE_OBJECT DeviceObject, IN ULONG SectorSize, IN ULONG MbrTypeIdentifier, OUT PVOID *MbrBuffer)
VOID FASTCALL	xHalIoAssignDriveLetters (IN PLOADER_PARAMETER_BLOCK LoaderBlock, IN PSTRING NtDeviceName, OUT PUCHAR NtSystemPath, OUT PSTRING NtSystemPathString)
NTSTATUS FASTCALL	xHalIoReadPartitionTable (IN PDEVICE_OBJECT DeviceObject, IN ULONG SectorSize, IN BOOLEAN ReturnRecognizedPartitions, IN OUT PDRIVE_LAYOUT_INFORMATION *PartitionBuffer)
NTSTATUS FASTCALL	xHalIoSetPartitionInformation (IN PDEVICE_OBJECT DeviceObject, IN ULONG SectorSize, IN ULONG PartitionNumber, IN ULONG PartitionType)
NTSTATUS FASTCALL	xHalIoWritePartitionTable (IN PDEVICE_OBJECT DeviceObject, IN ULONG SectorSize, IN ULONG SectorsPerTrack, IN ULONG NumberOfHeads, IN PDRIVE_LAYOUT_INFORMATION PartitionBuffer)
VOID NTAPI	xHalHaltSystem (VOID)
VOID NTAPI	xHalEndOfBoot (VOID)
VOID NTAPI	xHalSetWakeEnable (IN BOOLEAN Enable)
UCHAR NTAPI	xHalVectorToIDTEntry (IN ULONG Vector)
NTSTATUS NTAPI	xHalGetInterruptTranslator (IN INTERFACE_TYPE ParentInterfaceType, IN ULONG ParentBusNumber, IN INTERFACE_TYPE BridgeInterfaceType, IN USHORT Size, IN USHORT Version, OUT PTRANSLATOR_INTERFACE Translator, OUT PULONG BridgeBusNumber)
PBUS_HANDLER FASTCALL	xHalHandlerForBus (IN INTERFACE_TYPE InterfaceType, IN ULONG BusNumber)
VOID FASTCALL	xHalReferenceHandler (IN PBUS_HANDLER BusHandler)
NTSTATUS NTAPI	xHalInitPnpDriver (VOID)
NTSTATUS NTAPI	xHalInitPowerManagement (IN PPM_DISPATCH_TABLE PmDriverDispatchTable, OUT PPM_DISPATCH_TABLE *PmHalDispatchTable)
NTSTATUS NTAPI	xHalStartMirroring (VOID)
NTSTATUS NTAPI	xHalEndMirroring (IN ULONG PassNumber)
NTSTATUS NTAPI	xHalMirrorPhysicalMemory (IN PHYSICAL_ADDRESS PhysicalAddress, IN LARGE_INTEGER NumberOfBytes)
NTSTATUS NTAPI	xHalQueryBusSlots (IN PBUS_HANDLER BusHandler, IN ULONG BufferSize, OUT PULONG SlotNumbers, OUT PULONG ReturnedLength)
NTSTATUS NTAPI	xHalSetSystemInformation (IN HAL_SET_INFORMATION_CLASS InformationClass, IN ULONG BufferSize, IN PVOID Buffer)
NTSTATUS NTAPI	xHalQuerySystemInformation (IN HAL_QUERY_INFORMATION_CLASS InformationClass, IN ULONG BufferSize, IN OUT PVOID Buffer, OUT PULONG ReturnedLength)
VOID NTAPI	xHalLocateHiberRanges (IN PVOID MemoryMap)
NTSTATUS NTAPI	xHalRegisterBusHandler (IN INTERFACE_TYPE InterfaceType, IN BUS_DATA_TYPE ConfigSpace, IN ULONG BusNumber, IN INTERFACE_TYPE ParentInterfaceType, IN ULONG ParentBusNumber, IN ULONG ContextSize, IN PINSTALL_BUS_HANDLER InstallCallback, OUT PBUS_HANDLER *BusHandler)
VOID NTAPI	xHalSetWakeAlarm (IN ULONGLONG AlartTime, IN PTIME_FIELDS TimeFields)
BOOLEAN NTAPI	xHalTranslateBusAddress (IN INTERFACE_TYPE InterfaceType, IN ULONG BusNumber, IN PHYSICAL_ADDRESS BusAddress, IN OUT PULONG AddressSpace, OUT PPHYSICAL_ADDRESS TranslatedAddress)
NTSTATUS NTAPI	xHalAllocateMapRegisters (IN PADAPTER_OBJECT AdapterObject, IN ULONG Unknown, IN ULONG Unknown2, PMAP_REGISTER_ENTRY Registers)
NTSTATUS NTAPI	xKdSetupPciDeviceForDebugging (IN PVOID LoaderBlock OPTIONAL, IN OUT PDEBUG_DEVICE_DESCRIPTOR PciDevice)
NTSTATUS NTAPI	xKdReleasePciDeviceForDebugging (IN OUT PDEBUG_DEVICE_DESCRIPTOR PciDevice)
PVOID NTAPI	xKdGetAcpiTablePhase (IN struct _LOADER_PARAMETER_BLOCK *LoaderBlock, IN ULONG Signature)
PVOID NTAPI	MatchAll (IN PHYSICAL_ADDRESS PhysicalAddress, IN ULONG NumberPages, IN BOOLEAN FlushCurrentTLB)
VOID NTAPI	xKdUnmapVirtualAddress (IN PVOID VirtualAddress, IN ULONG NumberPages, IN BOOLEAN FlushCurrentTLB)

Macro Definition Documentation

BOOT_RECORD_RESERVED

#define BOOT_RECORD_RESERVED   0x1BC

Definition at line 245 of file hal.h.

BOOT_RECORD_SIGNATURE

#define BOOT_RECORD_SIGNATURE   0xAA55

Definition at line 246 of file hal.h.

BOOT_SIGNATURE_OFFSET

#define BOOT_SIGNATURE_OFFSET   ((0x200 / 2) - 1)

Definition at line 244 of file hal.h.

GET_ENDING_S_OF_CHS

#define GET_ENDING_S_OF_CHS

(

p

)

((UCHAR)(p->EndingCylinderLsb & 0x3F))

Definition at line 258 of file hal.h.

GET_PARTITION_LENGTH

#define GET_PARTITION_LENGTH

(

p

)

Value:

((ULONG)(p->PartitionLengthLsb0) +              \
     (ULONG)(p->PartitionLengthLsb1 << 8) +         \
     (ULONG)(p->PartitionLengthMsb0 << 16) +        \
     (ULONG)(p->PartitionLengthMsb1 << 24))

Definition at line 261 of file hal.h.

GET_STARTING_SECTOR

#define GET_STARTING_SECTOR

(

p

)

Value:

((ULONG)(p->StartingSectorLsb0) +               \
     (ULONG)(p->StartingSectorLsb1 << 8 ) +         \
     (ULONG)(p->StartingSectorMsb0 << 16) +         \
     (ULONG)(p->StartingSectorMsb1 << 24))

Definition at line 252 of file hal.h.

NUM_PARTITION_TABLE_ENTRIES

#define NUM_PARTITION_TABLE_ENTRIES   4

Definition at line 247 of file hal.h.

PARTITION_TABLE_OFFSET

#define PARTITION_TABLE_OFFSET   (0x1BE / 2)

Definition at line 243 of file hal.h.

SET_PARTITION_LENGTH

#define SET_PARTITION_LENGTH	(		p,
			l
	)

Value:

p->PartitionLengthLsb0 = l & 0xFF;              \
    p->PartitionLengthLsb1 = (l >> 8) & 0xFF;       \
    p->PartitionLengthMsb0 = (l >> 16) & 0xFF;      \
    p->PartitionLengthMsb1 = (l >> 24) & 0xFF

Definition at line 267 of file hal.h.

Typedef Documentation

BOOT_SECTOR_INFO

typedef struct _BOOT_SECTOR_INFO BOOT_SECTOR_INFO

DISK_LAYOUT

typedef struct _DISK_LAYOUT DISK_LAYOUT

PARTITION_DESCRIPTOR

typedef struct _PARTITION_DESCRIPTOR PARTITION_DESCRIPTOR

PARTITION_TABLE

typedef struct _PARTITION_TABLE PARTITION_TABLE

PBOOT_SECTOR_INFO

typedef struct _BOOT_SECTOR_INFO * PBOOT_SECTOR_INFO

PDISK_LAYOUT

typedef struct _DISK_LAYOUT * PDISK_LAYOUT

PPARTITION_DESCRIPTOR

typedef struct _PARTITION_DESCRIPTOR * PPARTITION_DESCRIPTOR

PPARTITION_TABLE

typedef struct _PARTITION_TABLE * PPARTITION_TABLE

PPTE

typedef struct _PTE * PPTE

PTE

typedef struct _PTE PTE

Function Documentation

MatchAll()

PVOID NTAPI MatchAll	(	IN PHYSICAL_ADDRESS	PhysicalAddress,
		IN ULONG	NumberPages,
		IN BOOLEAN	FlushCurrentTLB
	)

Definition at line 277 of file halstub.c.

{
    return NULL;
}

xHalAllocateMapRegisters()

NTSTATUS NTAPI xHalAllocateMapRegisters	(	IN PADAPTER_OBJECT	AdapterObject,
		IN ULONG	Unknown,
		IN ULONG	Unknown2,
		PMAP_REGISTER_ENTRY	Registers
	)

Definition at line 242 of file halstub.c.

{
    PAGED_CODE();

    return STATUS_NOT_IMPLEMENTED;
}

xHalEndMirroring()

NTSTATUS NTAPI xHalEndMirroring

(

IN ULONG

PassNumber

)

Definition at line 146 of file halstub.c.

{
    return STATUS_NOT_SUPPORTED;
}

xHalEndOfBoot()

VOID NTAPI xHalEndOfBoot

(

VOID

)

Definition at line 88 of file halstub.c.

{
    PAGED_CODE();

    /* Nothing */
    return;
}

xHalExamineMBR()

VOID FASTCALL xHalExamineMBR	(	IN PDEVICE_OBJECT	DeviceObject,
		IN ULONG	SectorSize,
		IN ULONG	MbrTypeIdentifier,
		OUT PVOID *	MbrBuffer
	)

Definition at line 1642 of file disksup.c.

{
    LARGE_INTEGER Offset;
    PUCHAR Buffer;
    ULONG BufferSize;
    KEVENT Event;
    IO_STATUS_BLOCK IoStatusBlock;
    PIRP Irp;
    PPARTITION_DESCRIPTOR PartitionDescriptor;
    NTSTATUS Status;
    PIO_STACK_LOCATION IoStackLocation;
    Offset.QuadPart = 0;

    /* Assume failure */
    *MbrBuffer = NULL;

    /* Normalize the buffer size */
    BufferSize = max(SectorSize, 512);

    /* Allocate the buffer */
    Buffer = ExAllocatePoolWithTag(NonPagedPool,
                                       PAGE_SIZE > BufferSize ?
                                       PAGE_SIZE : BufferSize,
                                       TAG_FILE_SYSTEM);
    if (!Buffer) return;

    /* Initialize the Event */
    KeInitializeEvent(&Event, NotificationEvent, FALSE);

    /* Build the IRP */
    Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
                                       DeviceObject,
                                       Buffer,
                                       BufferSize,
                                       &Offset,
                                       &Event,
                                       &IoStatusBlock);
    if (!Irp)
    {
        /* Failed */
        ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
        return;
    }

    /* Make sure to override volume verification */
    IoStackLocation = IoGetNextIrpStackLocation(Irp);
    IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;

    /* Call the driver */
    Status = IoCallDriver(DeviceObject, Irp);
    if (Status == STATUS_PENDING)
    {
        /* Wait for completion */
        KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
        Status = IoStatusBlock.Status;
    }

    /* Check driver Status */
    if (NT_SUCCESS(Status))
    {
        /* Validate the MBR Signature */
        if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
        {
            /* Failed */
            ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
            return;
        }

        /* Get the partition entry */
        PartitionDescriptor = (PPARTITION_DESCRIPTOR)
                               &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);

        /* Make sure it's what the caller wanted */
        if (PartitionDescriptor->PartitionType != MbrTypeIdentifier)
        {
            /* It's not, free our buffer */
            ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
        }
        else
        {
            /* Check if this is a secondary entry */
            if (PartitionDescriptor->PartitionType == 0x54)
            {
                /* Return our buffer, but at sector 63 */
                *(PULONG)Buffer = 63;
                *MbrBuffer = Buffer;
            }
            else if (PartitionDescriptor->PartitionType == 0x55)
            {
                /* EZ Drive, return the buffer directly */
                *MbrBuffer = Buffer;
            }
            else
            {
                /* Otherwise crash on debug builds */
                ASSERT(PartitionDescriptor->PartitionType == 0x55);
            }
        }
    }
}

xHalGetInterruptTranslator()

NTSTATUS NTAPI xHalGetInterruptTranslator	(	IN INTERFACE_TYPE	ParentInterfaceType,
		IN ULONG	ParentBusNumber,
		IN INTERFACE_TYPE	BridgeInterfaceType,
		IN USHORT	Size,
		IN USHORT	Version,
		OUT PTRANSLATOR_INTERFACE	Translator,
		OUT PULONG	BridgeBusNumber
	)

Definition at line 156 of file translate.c.

{
    PAGED_CODE();

    ASSERT(Version == HAL_IRQ_TRANSLATOR_VERSION);
    ASSERT(Size >= sizeof(TRANSLATOR_INTERFACE));

    /* Only (E)ISA interfaces are supported */
    if (BridgeInterfaceType == Internal || BridgeInterfaceType >= MicroChannel)
    {
        return STATUS_NOT_IMPLEMENTED;
    }

    /* Fill in output struct */
    Translator->Size = sizeof(TRANSLATOR_INTERFACE);
    Translator->Version = HAL_IRQ_TRANSLATOR_VERSION;
    /* In case caller set interface to undefined, faulty it to ISA */
    Translator->Context = UlongToPtr((BridgeInterfaceType == InterfaceTypeUndefined) ? Isa : BridgeInterfaceType);
    Translator->InterfaceReference = FstubTranslatorNull;
    Translator->InterfaceDereference = FstubTranslatorNull;
    Translator->TranslateResources = FstubTranslateResource;
    Translator->TranslateResourceRequirements = FstubTranslateRequirement;

    return STATUS_SUCCESS;
}

xHalHaltSystem()

VOID NTAPI xHalHaltSystem

(

VOID

)

Definition at line 41 of file halstub.c.

{
    /* Halt execution */
    while (TRUE);
}

xHalHandlerForBus()

PBUS_HANDLER FASTCALL xHalHandlerForBus	(	IN INTERFACE_TYPE	InterfaceType,
		IN ULONG	BusNumber
	)

Definition at line 106 of file halstub.c.

{
    return NULL;
}

xHalInitPnpDriver()

NTSTATUS NTAPI xHalInitPnpDriver

(

VOID

)

Definition at line 122 of file halstub.c.

{
    return STATUS_NOT_SUPPORTED;
}

xHalInitPowerManagement()

NTSTATUS NTAPI xHalInitPowerManagement	(	IN PPM_DISPATCH_TABLE	PmDriverDispatchTable,
		OUT PPM_DISPATCH_TABLE *	PmHalDispatchTable
	)

Definition at line 129 of file halstub.c.

{
    return STATUS_NOT_SUPPORTED;
}

xHalIoAssignDriveLetters()

VOID FASTCALL xHalIoAssignDriveLetters	(	IN PLOADER_PARAMETER_BLOCK	LoaderBlock,
		IN PSTRING	NtDeviceName,
		OUT PUCHAR	NtSystemPath,
		OUT PSTRING	NtSystemPathString
	)

Definition at line 912 of file disksup.c.

{
    USHORT i;
    PULONG Devices;
    NTSTATUS Status;
    WCHAR Buffer[50];
    HANDLE FileHandle;
    UCHAR DriveLetter;
    BOOLEAN SystemFound;
    IO_STATUS_BLOCK StatusBlock;
    PARTITION_TYPE PartitionType;
    ANSI_STRING StringA1, StringA2;
    PSTR Buffer1, Buffer2, LoadOptions;
    OBJECT_ATTRIBUTES ObjectAttributes;
    PDRIVE_LAYOUT_INFORMATION LayoutInfo;
    PCONFIGURATION_INFORMATION ConfigInfo;
    UNICODE_STRING StringU1, StringU2, StringU3;
    ULONG Increment, DiskCount, RealDiskCount, HarddiskCount, PartitionCount, SystemPartition;

    PAGED_CODE();

    /* Get our disk count */
    ConfigInfo = IoGetConfigurationInformation();
    DiskCount = ConfigInfo->DiskCount;
    RealDiskCount = 0;

    /* Allocate two generic string buffers we'll use and reuser later on */
    Buffer1 = ExAllocatePoolWithTag(NonPagedPool, 128, TAG_FSTUB);
    Buffer2 = ExAllocatePoolWithTag(NonPagedPool, 64, TAG_FSTUB);
    if (Buffer1 == NULL || Buffer2 == NULL)
    {
        KeBugCheck(ASSIGN_DRIVE_LETTERS_FAILED);
    }

    /* In case of a remote boot, setup system path */
    if (IoRemoteBootClient)
    {
        PSTR Last, Saved;

        /* Find last \ */
        Last = strrchr(LoaderBlock->NtBootPathName, '\\');
        Saved = NULL;
        /* Misformed name, fail */
        if (Last == NULL)
        {
            KeBugCheck(ASSIGN_DRIVE_LETTERS_FAILED);
        }

        /* In case the name was terminated by a \... */
        if (Last[1] == ANSI_NULL)
        {
            /* Erase it, save position and find the previous \ */
            *Last = ANSI_NULL;
            Saved = Last;
            Last = strrchr(LoaderBlock->NtBootPathName, '\\');
            *Saved = '\\';
        }

        /* Misformed name, fail */
        if (Last == NULL)
        {
            KeBugCheck(ASSIGN_DRIVE_LETTERS_FAILED);
        }

        /* For a remote boot, assign X drive letter */
        NtSystemPath[0] = 'X';
        NtSystemPath[1] = ':';
        /* And copy the end of the boot path */
        strcpy((PSTR)&NtSystemPath[2], Last);

        /* If we had to remove the trailing \, remove it here too */
        if (Saved != NULL)
        {
            NtSystemPath[strlen((PSTR)NtSystemPath) - 1] = ANSI_NULL;
        }

        /* Setup output string */
        RtlInitString(NtSystemPathString, (PSTR)NtSystemPath);
    }

    /* For each of our disks, create the physical device DOS device */
    Increment = 0;
    if (DiskCount != 0)
    {
        for (i = 0; i < DiskCount; ++i)
        {
            /* Setup the origin name */
            sprintf(Buffer1, "\\Device\\Harddisk%d\\Partition%d", i, 0);
            RtlInitAnsiString(&StringA1, Buffer1);
            if (!NT_SUCCESS(RtlAnsiStringToUnicodeString(&StringU1, &StringA1, TRUE)))
            {
                /* We cannot fail */
                KeBugCheck(ASSIGN_DRIVE_LETTERS_FAILED);
            }

            /* Open the device */
            InitializeObjectAttributes(&ObjectAttributes,
                                       &StringU1,
                                       OBJ_CASE_INSENSITIVE,
                                       NULL,
                                       NULL);
            Status = ZwOpenFile(&FileHandle,
                                SYNCHRONIZE | FILE_READ_DATA,
                                &ObjectAttributes,
                                &StatusBlock,
                                FILE_SHARE_READ,
                                FILE_SYNCHRONOUS_IO_NONALERT);
            if (NT_SUCCESS(Status))
            {
                /* If we managed, create the link */
                sprintf(Buffer2, "\\DosDevices\\PhysicalDrive%d", i);
                RtlInitAnsiString(&StringA2, Buffer2);
                Status = RtlAnsiStringToUnicodeString(&StringU2, &StringA2, TRUE);
                if (NT_SUCCESS(Status))
                {
                    IoCreateSymbolicLink(&StringU2, &StringU1);
                    RtlFreeUnicodeString(&StringU2);
                }

                ZwClose(FileHandle);

                RealDiskCount = i + 1;
            }

            RtlFreeUnicodeString(&StringU1);

            if (!NT_SUCCESS(Status))
            {
                if (Increment < 50)
                {
                    ++Increment;
                    ++DiskCount;
                }
            }
        }
    }

    /* We done for our buffers */
    ExFreePoolWithTag(Buffer1, TAG_FSTUB);
    ExFreePoolWithTag(Buffer2, TAG_FSTUB);

    /* Upcase our load options, if any */
    if (LoaderBlock->LoadOptions != NULL)
    {
        LoadOptions = _strupr(LoaderBlock->LoadOptions);
    }
    else
    {
        LoadOptions = NULL;
    }

    /* If we boot with /MININT (system hive as volatile) option, assign X letter to boot device */
    if (LoadOptions != NULL &&
        strstr(LoadOptions, "MININT") != 0 &&
        NT_SUCCESS(RtlAnsiStringToUnicodeString(&StringU1, NtDeviceName, TRUE)))
    {
        if (NT_SUCCESS(HalpSetMountLetter(&StringU1, 'X')))
        {
            *NtSystemPath = 'X';
        }

        RtlFreeUnicodeString(&StringU1);
    }

    /* Compute our disks derangements */
    DiskCount -= Increment;
    if (RealDiskCount > DiskCount)
    {
        DiskCount = RealDiskCount;
    }
    Devices = IopComputeHarddiskDerangements(DiskCount);

    /* Now, start browsing all our disks for assigning drive letters
     * Here, we'll only handle boot partition and primary partitions
     */
    HarddiskCount = 0;
    for (i = 0; i < DiskCount; ++i)
    {
        /* Get device ID according to derangements map */
        if (Devices != NULL)
        {
            HarddiskCount = Devices[i];
        }

        /* Query disk layout */
        swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition0", HarddiskCount);
        RtlInitUnicodeString(&StringU1, Buffer);
        if (!NT_SUCCESS(HalpQueryDriveLayout(&StringU1, &LayoutInfo)))
        {
            LayoutInfo = NULL;
        }

        /* Assume we didn't find system */
        SystemFound = FALSE;
        swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition%d", HarddiskCount, 1);
        RtlInitUnicodeString(&StringU1, Buffer);
        /* Query partition info for our disk */
        if (!NT_SUCCESS(HalpQueryPartitionType(&StringU1, LayoutInfo, &PartitionType)))
        {
            /* It failed, retry for all the partitions */
            for (PartitionCount = 1; ; ++PartitionCount)
            {
                swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition%d", HarddiskCount, PartitionCount);
                RtlInitUnicodeString(&StringU1, Buffer);
                if (!NT_SUCCESS(HalpQueryPartitionType(&StringU1, LayoutInfo, &PartitionType)))
                {
                    break;
                }

                /* We found a primary partition, assign a drive letter */
                if (PartitionType == PrimaryPartition)
                {
                    HalpNextDriveLetter(&StringU1, NtDeviceName, NtSystemPath, 0);
                    break;
                }
            }
        }
        else
        {
            /* All right */
            for (PartitionCount = 2; ; ++PartitionCount)
            {
                /* If our partition is bootable (MBR) or data (GPT), that's system partition */
                if (PartitionType == BootablePartition || PartitionType == DataPartition)
                {
                    SystemFound = TRUE;

                    /* Assign a drive letter and stop here if MBR */
                    HalpNextDriveLetter(&StringU1, NtDeviceName, NtSystemPath, 0);
                    if (PartitionType == BootablePartition)
                    {
                        break;
                    }
                }

                /* Keep looping on all the partitions */
                swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition%d", HarddiskCount, PartitionCount);
                RtlInitUnicodeString(&StringU1, Buffer);
                if (!NT_SUCCESS(HalpQueryPartitionType(&StringU1, LayoutInfo, &PartitionType)))
                {
                    /* Mount every primary partition if we didn't find system */
                    if (!SystemFound)
                    {
                        for (PartitionCount = 1; ; ++PartitionCount)
                        {
                            swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition%d", HarddiskCount, PartitionCount);
                            RtlInitUnicodeString(&StringU1, Buffer);
                            if (!NT_SUCCESS(HalpQueryPartitionType(&StringU1, LayoutInfo, &PartitionType)))
                            {
                                break;
                            }

                            if (PartitionType == PrimaryPartition)
                            {
                                HalpNextDriveLetter(&StringU1, NtDeviceName, NtSystemPath, 0);
                                break;
                            }
                        }
                    }

                    break;
                }
            }
        }

        /* Free layout, we'll reallocate it for next device */
        if (LayoutInfo != NULL)
        {
            ExFreePoolWithTag(LayoutInfo, TAG_FSTUB);
        }

        HarddiskCount = i + 1;
    }

    /* Now, assign logical partitions */
    for (i = 0; i < DiskCount; ++i)
    {
        /* Get device ID according to derangements map */
        if (Devices != NULL)
        {
            HarddiskCount = Devices[i];
        }
        else
        {
            HarddiskCount = i;
        }

        /* Query device layout */
        swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition0", HarddiskCount);
        RtlInitUnicodeString(&StringU1, Buffer);
        if (!NT_SUCCESS(HalpQueryDriveLayout(&StringU1, &LayoutInfo)))
        {
            LayoutInfo = NULL;
        }

        /* And assign drive letter to logical partitions */
        for (PartitionCount = 1; ; ++PartitionCount)
        {
            swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition%d", HarddiskCount, PartitionCount);
            RtlInitUnicodeString(&StringU1, Buffer);
            if (!NT_SUCCESS(HalpQueryPartitionType(&StringU1, LayoutInfo, &PartitionType)))
            {
                break;
            }

            if (PartitionType == LogicalPartition)
            {
                HalpNextDriveLetter(&StringU1, NtDeviceName, NtSystemPath, 0);
            }
        }

        /* Free layout, we'll reallocate it for next device */
        if (LayoutInfo != NULL)
        {
            ExFreePoolWithTag(LayoutInfo, 0);
        }
    }

    /* Now, assign drive letters to everything else */
    for (i = 0; i < DiskCount; ++i)
    {
        /* Get device ID according to derangements map */
        if (Devices != NULL)
        {
            HarddiskCount = Devices[i];
        }
        else
        {
            HarddiskCount = i;
        }

        /* Query device layout */
        swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition0", HarddiskCount);
        RtlInitUnicodeString(&StringU1, Buffer);
        if (!NT_SUCCESS(HalpQueryDriveLayout(&StringU1, &LayoutInfo)))
        {
            LayoutInfo = NULL;
        }

        /* Save system partition if any */
        SystemPartition = 0;
        for (PartitionCount = 1; ; ++PartitionCount)
        {
            swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition%d", HarddiskCount, PartitionCount);
            RtlInitUnicodeString(&StringU1, Buffer);
            if (!NT_SUCCESS(HalpQueryPartitionType(&StringU1, LayoutInfo, &PartitionType)))
            {
                break;
            }

            if ((PartitionType == BootablePartition || PartitionType == PrimaryPartition) && (SystemPartition == 0))
            {
                SystemPartition = PartitionCount;
            }
        }

        /* And assign drive letter to anything but system partition */
        for (PartitionCount = 1; ; ++PartitionCount)
        {
            if (PartitionCount != SystemPartition)
            {
                swprintf(Buffer, L"\\Device\\Harddisk%d\\Partition%d", HarddiskCount, PartitionCount);
                RtlInitUnicodeString(&StringU1, Buffer);
                if (!NT_SUCCESS(HalpQueryPartitionType(&StringU1, LayoutInfo, &PartitionType)))
                {
                    if (LayoutInfo != NULL)
                    {
                        ExFreePoolWithTag(LayoutInfo, 0);
                    }

                    break;
                }

                if (PartitionType == PrimaryPartition || PartitionType == FtPartition)
                {
                    HalpNextDriveLetter(&StringU1, NtDeviceName, NtSystemPath, 0);
                }
            }
        }
    }

    /* We're done with disks, if we have a device map, free it */
    if (Devices != NULL)
    {
        ExFreePoolWithTag(Devices, TAG_FSTUB);
    }

    /* Now, assign drive letter to floppy drives */
    for (i = 0; i < ConfigInfo->FloppyCount; ++i)
    {
        swprintf(Buffer, L"\\Device\\Floppy%d", i);
        RtlInitUnicodeString(&StringU1, Buffer);
        if (HalpIsOldStyleFloppy(&StringU1))
        {
            HalpNextDriveLetter(&StringU1, NtDeviceName, NtSystemPath, TRUE);
        }
    }

    /* And CD drives */
    for (i = 0; i < ConfigInfo->CdRomCount; ++i)
    {
        swprintf(Buffer, L"\\Device\\CdRom%d", i);
        RtlInitUnicodeString(&StringU1, Buffer);
        HalpNextDriveLetter(&StringU1, NtDeviceName, NtSystemPath, TRUE);
    }

    /* If not remote boot, handle NtDeviceName */
    if (!IoRemoteBootClient && NT_SUCCESS(RtlAnsiStringToUnicodeString(&StringU1, NtDeviceName, TRUE)))
    {
        /* Assign it a drive letter */
        DriveLetter = HalpNextDriveLetter(&StringU1, NULL, NULL, TRUE);
        if (DriveLetter != 0)
        {
            if (DriveLetter != 0xFF)
            {
                *NtSystemPath = DriveLetter;
            }
        }
        /* If it fails through mount manager, retry manually */
        else
        {
            RtlInitUnicodeString(&StringU2, L"\\Device\\Floppy");
            RtlInitUnicodeString(&StringU3, L"\\Device\\CdRom");

            if (RtlPrefixUnicodeString(&StringU2, &StringU1, TRUE))
            {
                DriveLetter = 'A';
            }
            else if (RtlPrefixUnicodeString(&StringU3, &StringU1, TRUE))
            {
                DriveLetter = 'D';
            }
            else
            {
                DriveLetter = 'C';
            }

            /* Try any drive letter */
            while (HalpSetMountLetter(&StringU1, DriveLetter) != STATUS_SUCCESS)
            {
                ++DriveLetter;

                if (DriveLetter > 'Z')
                {
                    break;
                }
            }

            /* If we're beyond Z (ie, no slot left) */
            if (DriveLetter > 'Z')
            {
                /* Delete Z, and reuse it for system */
                HalpDeleteMountLetter('Z');
                HalpSetMountLetter(&StringU1, 'Z');
                *NtSystemPath = 'Z';
            }
            else
            {
                /* Return matching drive letter */
                *NtSystemPath = DriveLetter;
            }
        }

        RtlFreeUnicodeString(&StringU1);
    }

    /* Enable auto assignement for mountmgr */
    HalpEnableAutomaticDriveLetterAssignment();
}

xHalIoReadPartitionTable()

NTSTATUS FASTCALL xHalIoReadPartitionTable	(	IN PDEVICE_OBJECT	DeviceObject,
		IN ULONG	SectorSize,
		IN BOOLEAN	ReturnRecognizedPartitions,
		IN OUT PDRIVE_LAYOUT_INFORMATION *	PartitionBuffer
	)

Definition at line 1767 of file disksup.c.

{
    KEVENT Event;
    IO_STATUS_BLOCK IoStatusBlock;
    PIRP Irp;
    PPARTITION_DESCRIPTOR PartitionDescriptor;
    CCHAR Entry;
    NTSTATUS Status;
    PPARTITION_INFORMATION PartitionInfo;
    PUCHAR Buffer = NULL;
    ULONG BufferSize = 2048, InputSize;
    PDRIVE_LAYOUT_INFORMATION DriveLayoutInfo = NULL;
    LONG j = -1, i = -1, k;
    DISK_GEOMETRY_EX DiskGeometryEx;
    LONGLONG EndSector, MaxSector, StartOffset;
    LARGE_INTEGER Offset, VolumeOffset;
    BOOLEAN IsPrimary = TRUE, IsEzDrive = FALSE, MbrFound = FALSE;
    BOOLEAN IsValid, IsEmpty = TRUE;
    PVOID MbrBuffer;
    PIO_STACK_LOCATION IoStackLocation;
    UCHAR PartitionType;
    LARGE_INTEGER HiddenSectors64;
    VolumeOffset.QuadPart = Offset.QuadPart = 0;
    PAGED_CODE();

    /* Allocate the buffer */
    *PartitionBuffer = ExAllocatePoolWithTag(NonPagedPool,
                                             BufferSize,
                                             TAG_FILE_SYSTEM);
    if (!(*PartitionBuffer)) return STATUS_INSUFFICIENT_RESOURCES;

    /* Normalize the buffer size */
    InputSize = max(512, SectorSize);

    /* Check for EZ Drive */
    HalExamineMBR(DeviceObject, InputSize, 0x55, &MbrBuffer);
    if (MbrBuffer)
    {
        /* EZ Drive found, bias the offset */
        IsEzDrive = TRUE;
        ExFreePoolWithTag(MbrBuffer, TAG_FILE_SYSTEM);
        Offset.QuadPart = 512;
    }

    /* Get drive geometry */
    Status = HalpGetFullGeometry(DeviceObject, &DiskGeometryEx);
    if (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
        *PartitionBuffer = NULL;
        return Status;
    }

    /* Get the end and maximum sector */
    EndSector = DiskGeometryEx.DiskSize.QuadPart / DiskGeometryEx.Geometry.BytesPerSector;
    MaxSector = EndSector << 1;
    DPRINT("FSTUB: DiskSize = %#I64x, MaxSector = %#I64x\n",
            DiskGeometryEx.DiskSize, MaxSector);

    /* Allocate our buffer */
    Buffer = ExAllocatePoolWithTag(NonPagedPool, InputSize, TAG_FILE_SYSTEM);
    if (!Buffer)
    {
        /* Fail, free the input buffer */
        ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
        *PartitionBuffer = NULL;
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    /* Start partition loop */
    do
    {
        /* Assume the partition is valid */
        IsValid = TRUE;

        /* Initialize the event */
        KeInitializeEvent(&Event, NotificationEvent, FALSE);

        /* Clear the buffer and build the IRP */
        RtlZeroMemory(Buffer, InputSize);
        Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
                                           DeviceObject,
                                           Buffer,
                                           InputSize,
                                           &Offset,
                                           &Event,
                                           &IoStatusBlock);
        if (!Irp)
        {
            /* Failed */
            Status = STATUS_INSUFFICIENT_RESOURCES;
            break;
        }

        /* Make sure to disable volume verification */
        IoStackLocation = IoGetNextIrpStackLocation(Irp);
        IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;

        /* Call the driver */
        Status = IoCallDriver(DeviceObject, Irp);
        if (Status == STATUS_PENDING)
        {
            /* Wait for completion */
            KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
            Status = IoStatusBlock.Status;
        }

        /* Normalize status code and check for failure */
        if (Status == STATUS_NO_DATA_DETECTED) Status = STATUS_SUCCESS;
        if (!NT_SUCCESS(Status)) break;

        /* If we biased for EZ-Drive, unbias now */
        if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;

        /* Make sure this is a valid MBR */
        if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
        {
            /* It's not, fail */
            DPRINT1("FSTUB: (IoReadPartitionTable) No 0xaa55 found in "
                    "partition table %d\n", j + 1);
            break;
        }

        /* At this point we have a valid MBR */
        MbrFound = TRUE;

        /* Check if we weren't given an offset */
        if (!Offset.QuadPart)
        {
            /* Then read the signature off the disk */
            (*PartitionBuffer)->Signature = ((PULONG)Buffer)[PARTITION_TABLE_OFFSET / 2 - 1];
        }

        /* Get the partition descriptor array */
        PartitionDescriptor = (PPARTITION_DESCRIPTOR)
                               &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);

        /* Start looping partitions */
        j++;
        DPRINT("FSTUB: Partition Table %d:\n", j);
        for (Entry = 1, k = 0; Entry <= 4; Entry++, PartitionDescriptor++)
        {
            /* Get the partition type */
            PartitionType = PartitionDescriptor->PartitionType;

            /* Print debug messages */
            DPRINT("Partition Entry %d,%d: type %#x %s\n",
                    j,
                    Entry,
                    PartitionType,
                    (PartitionDescriptor->ActiveFlag) ? "Active" : "");
            DPRINT("\tOffset %#08lx for %#08lx Sectors\n",
                    GET_STARTING_SECTOR(PartitionDescriptor),
                    GET_PARTITION_LENGTH(PartitionDescriptor));

            /* Check whether we're facing a protective MBR */
            if (PartitionType == EFI_PMBR_OSTYPE_EFI)
            {
                /* Partition length might be bigger than disk size */
                FstubFixupEfiPartition(PartitionDescriptor, DiskGeometryEx.DiskSize.QuadPart);
            }

            /* Make sure that the partition is valid, unless it's the first */
            if (!(HalpIsValidPartitionEntry(PartitionDescriptor,
                                            DiskGeometryEx.DiskSize.QuadPart,
                                            MaxSector)) && (j == 0))
            {
                /* It's invalid, so fail */
                IsValid = FALSE;
                break;
            }

            /* Check if it's a container */
            if (IsContainerPartition(PartitionType))
            {
                /* Increase the count of containers */
                if (++k != 1)
                {
                    /* More then one table is invalid */
                    DPRINT1("FSTUB: Multiple container partitions found in "
                            "partition table %d\n - table is invalid\n",
                            j);
                    IsValid = FALSE;
                    break;
                }
            }

            /* Check if the partition is supposedly empty */
            if (IsEmpty)
            {
                /* But check if it actually has a start and/or length */
                if ((GET_STARTING_SECTOR(PartitionDescriptor)) ||
                    (GET_PARTITION_LENGTH(PartitionDescriptor)))
                {
                    /* So then it's not really empty */
                    IsEmpty = FALSE;
                }
            }

            /* Check if the caller wanted only recognized partitions */
            if (ReturnRecognizedPartitions)
            {
                /* Then check if this one is unused, or a container */
                if ((PartitionType == PARTITION_ENTRY_UNUSED) ||
                    IsContainerPartition(PartitionType))
                {
                    /* Skip it, since the caller doesn't want it */
                    continue;
                }
            }

            /* Increase the structure count and check if they can fit */
            if ((sizeof(DRIVE_LAYOUT_INFORMATION) +
                 (++i * sizeof(PARTITION_INFORMATION))) >
                BufferSize)
            {
                /* Allocate a new buffer that's twice as big */
                DriveLayoutInfo = ExAllocatePoolWithTag(NonPagedPool,
                                                        BufferSize << 1,
                                                        TAG_FILE_SYSTEM);
                if (!DriveLayoutInfo)
                {
                    /* Out of memory, unto this extra structure */
                    --i;
                    Status = STATUS_INSUFFICIENT_RESOURCES;
                    break;
                }

                /* Copy the contents of the old buffer */
                RtlMoveMemory(DriveLayoutInfo,
                              *PartitionBuffer,
                              BufferSize);

                /* Free the old buffer and set this one as the new one */
                ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
                *PartitionBuffer = DriveLayoutInfo;

                /* Double the size */
                BufferSize <<= 1;
            }

            /* Now get the current structure being filled and initialize it */
            PartitionInfo = &(*PartitionBuffer)->PartitionEntry[i];
            PartitionInfo->PartitionType = PartitionType;
            PartitionInfo->RewritePartition = FALSE;

            /* Check if we're dealing with a partition that's in use */
            if (PartitionType != PARTITION_ENTRY_UNUSED)
            {
                /* Check if it's bootable */
                PartitionInfo->BootIndicator = PartitionDescriptor->
                                               ActiveFlag & 0x80 ?
                                               TRUE : FALSE;

                /* Check if its' a container */
                if (IsContainerPartition(PartitionType))
                {
                    /* Then don't recognize it and use the volume offset */
                    PartitionInfo->RecognizedPartition = FALSE;
                    StartOffset = VolumeOffset.QuadPart;
                }
                else
                {
                    /* Then recognize it and use the partition offset */
                    PartitionInfo->RecognizedPartition = TRUE;
                    StartOffset = Offset.QuadPart;
                }

                /* Get the starting offset */
                PartitionInfo->StartingOffset.QuadPart =
                    StartOffset +
                    UInt32x32To64(GET_STARTING_SECTOR(PartitionDescriptor),
                                  SectorSize);

                /* Calculate the number of hidden sectors */
                HiddenSectors64.QuadPart = (PartitionInfo->
                                            StartingOffset.QuadPart -
                                            StartOffset) /
                                            SectorSize;
                PartitionInfo->HiddenSectors = HiddenSectors64.LowPart;

                /* Get the partition length */
                PartitionInfo->PartitionLength.QuadPart =
                    UInt32x32To64(GET_PARTITION_LENGTH(PartitionDescriptor),
                                  SectorSize);

                /* Get the partition number */
                PartitionInfo->PartitionNumber = (!IsContainerPartition(PartitionType)) ? i + 1 : 0;
            }
            else
            {
                /* Otherwise, clear all the relevant fields */
                PartitionInfo->BootIndicator = FALSE;
                PartitionInfo->RecognizedPartition = FALSE;
                PartitionInfo->StartingOffset.QuadPart = 0;
                PartitionInfo->PartitionLength.QuadPart = 0;
                PartitionInfo->HiddenSectors = 0;

                PartitionInfo->PartitionNumber = 0;
            }
        }

        /* Finish debug log, and check for failure */
        DPRINT("\n");
        if (!NT_SUCCESS(Status)) break;

        /* Also check if we hit an invalid entry here */
        if (!IsValid)
        {
            /* We did, so break out of the loop minus one entry */
            j--;
            break;
        }

        /* Reset the offset */
        Offset.QuadPart = 0;

        /* Go back to the descriptor array and loop it */
        PartitionDescriptor = (PPARTITION_DESCRIPTOR)
                               &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
        for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
        {
            /* Check if this is a container partition, since we skipped them */
            if (IsContainerPartition(PartitionDescriptor->PartitionType))
            {
                /* Get its offset */
                Offset.QuadPart = VolumeOffset.QuadPart +
                                  UInt32x32To64(
                                     GET_STARTING_SECTOR(PartitionDescriptor),
                                     SectorSize);

                /* If this is a primary partition, this is the volume offset */
                if (IsPrimary) VolumeOffset = Offset;

                /* Also update the maximum sector */
                MaxSector = GET_PARTITION_LENGTH(PartitionDescriptor);
                DPRINT1("FSTUB: MaxSector now = %I64d\n", MaxSector);
                break;
            }
        }

        /* Loop the next partitions, which are not primary anymore */
        IsPrimary = FALSE;
    } while (Offset.HighPart | Offset.LowPart);

    /* Check if this is a removable device that's probably a super-floppy */
    if ((DiskGeometryEx.Geometry.MediaType == RemovableMedia) &&
        (j == 0) && (MbrFound) && (IsEmpty))
    {
        PBOOT_SECTOR_INFO BootSectorInfo = (PBOOT_SECTOR_INFO)Buffer;

        /* Read the jump bytes to detect super-floppy */
        if ((BootSectorInfo->JumpByte[0] == 0xeb) ||
            (BootSectorInfo->JumpByte[0] == 0xe9))
        {
            /* Super floppes don't have typical MBRs, so skip them */
            DPRINT1("FSTUB: Jump byte %#x found along with empty partition "
                    "table - disk is a super floppy and has no valid MBR\n",
                    BootSectorInfo->JumpByte);
            j = -1;
        }
    }

    /* Check if we're still at partition -1 */
    if (j == -1)
    {
        /* The likely cause is the super floppy detection above */
        if ((MbrFound) || (DiskGeometryEx.Geometry.MediaType == RemovableMedia))
        {
            /* Print out debugging information */
            DPRINT1("FSTUB: Drive %#p has no valid MBR. Make it into a "
                    "super-floppy\n",
                    DeviceObject);
            DPRINT1("FSTUB: Drive has %I64d sectors and is %#016I64x "
                    "bytes large\n",
                    EndSector, DiskGeometryEx.DiskSize);

            /* We should at least have some sectors */
            if (EndSector > 0)
            {
                /* Get the entry we'll use */
                PartitionInfo = &(*PartitionBuffer)->PartitionEntry[0];

                /* Fill it out with data for a super-floppy */
                PartitionInfo->RewritePartition = FALSE;
                PartitionInfo->RecognizedPartition = TRUE;
                PartitionInfo->PartitionType = PARTITION_FAT_16;
                PartitionInfo->BootIndicator = FALSE;
                PartitionInfo->HiddenSectors = 0;
                PartitionInfo->StartingOffset.QuadPart = 0;
                PartitionInfo->PartitionLength = DiskGeometryEx.DiskSize;

                /* FIXME: REACTOS HACK */
                PartitionInfo->PartitionNumber = 0;

                /* Set the signature and set the count back to 0 */
                (*PartitionBuffer)->Signature = 1;
                i = 0;
            }
        }
        else
        {
            /* Otherwise, this isn't a super floppy, so set an invalid count */
            i = -1;
        }
    }

    /* Set the partition count */
    (*PartitionBuffer)->PartitionCount = ++i;

    /* If we have no count, delete the signature */
    if (!i) (*PartitionBuffer)->Signature = 0;

    /* Free the buffer and check for success */
    if (Buffer) ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
    if (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
        *PartitionBuffer = NULL;
    }

    /* Return status */
    return Status;
}

xHalIoSetPartitionInformation()

NTSTATUS FASTCALL xHalIoSetPartitionInformation	(	IN PDEVICE_OBJECT	DeviceObject,
		IN ULONG	SectorSize,
		IN ULONG	PartitionNumber,
		IN ULONG	PartitionType
	)

Definition at line 2197 of file disksup.c.

{
    PIRP Irp;
    KEVENT Event;
    IO_STATUS_BLOCK IoStatusBlock;
    NTSTATUS Status;
    LARGE_INTEGER Offset, VolumeOffset;
    PUCHAR Buffer = NULL;
    ULONG BufferSize;
    ULONG i = 0;
    ULONG Entry;
    PPARTITION_DESCRIPTOR PartitionDescriptor;
    BOOLEAN IsPrimary = TRUE, IsEzDrive = FALSE;
    PVOID MbrBuffer;
    PIO_STACK_LOCATION IoStackLocation;
    VolumeOffset.QuadPart = Offset.QuadPart = 0;
    PAGED_CODE();

    /* Normalize the buffer size */
    BufferSize = max(512, SectorSize);

    /* Check for EZ Drive */
    HalExamineMBR(DeviceObject, BufferSize, 0x55, &MbrBuffer);
    if (MbrBuffer)
    {
        /* EZ Drive found, bias the offset */
        IsEzDrive = TRUE;
        ExFreePoolWithTag(MbrBuffer, TAG_FILE_SYSTEM);
        Offset.QuadPart = 512;
    }

    /* Allocate our partition buffer */
    Buffer = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, TAG_FILE_SYSTEM);
    if (!Buffer) return STATUS_INSUFFICIENT_RESOURCES;

    /* Initialize the event we'll use and loop partitions */
    KeInitializeEvent(&Event, NotificationEvent, FALSE);
    do
    {
        /* Reset the event since we reuse it */
        KeClearEvent(&Event);

        /* Build the read IRP */
        Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
                                           DeviceObject,
                                           Buffer,
                                           BufferSize,
                                           &Offset,
                                           &Event,
                                           &IoStatusBlock);
        if (!Irp)
        {
            /* Fail */
            Status = STATUS_INSUFFICIENT_RESOURCES;
            break;
        }

        /* Make sure to disable volume verification */
        IoStackLocation = IoGetNextIrpStackLocation(Irp);
        IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;

        /* Call the driver */
        Status = IoCallDriver(DeviceObject, Irp);
        if (Status == STATUS_PENDING)
        {
            /* Wait for completion */
            KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
            Status = IoStatusBlock.Status;
        }

        /* Check for failure */
        if (!NT_SUCCESS(Status)) break;

        /* If we biased for EZ-Drive, unbias now */
        if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;

        /* Make sure this is a valid MBR */
        if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
        {
            /* It's not, fail */
            Status = STATUS_BAD_MASTER_BOOT_RECORD;
            break;
        }

        /* Get the partition descriptors and loop them */
        PartitionDescriptor = (PPARTITION_DESCRIPTOR)
                              &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
        for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
        {
            /* Check if it's unused or a container partition */
            if ((PartitionDescriptor->PartitionType ==
                 PARTITION_ENTRY_UNUSED) ||
                (IsContainerPartition(PartitionDescriptor->PartitionType)))
            {
                /* Go to the next one */
                continue;
            }

            /* It's a valid partition, so increase the partition count */
            if (++i == PartitionNumber)
            {
                /* We found a match, set the type */
                PartitionDescriptor->PartitionType = (UCHAR)PartitionType;

                /* Reset the reusable event */
                KeClearEvent(&Event);

                /* Build the write IRP */
                Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
                                                   DeviceObject,
                                                   Buffer,
                                                   BufferSize,
                                                   &Offset,
                                                   &Event,
                                                   &IoStatusBlock);
                if (!Irp)
                {
                    /* Fail */
                    Status = STATUS_INSUFFICIENT_RESOURCES;
                    break;
                }

                /* Disable volume verification */
                IoStackLocation = IoGetNextIrpStackLocation(Irp);
                IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;

                /* Call the driver */
                Status = IoCallDriver(DeviceObject, Irp);
                if (Status == STATUS_PENDING)
                {
                    /* Wait for completion */
                    KeWaitForSingleObject(&Event,
                                          Executive,
                                          KernelMode,
                                          FALSE,
                                          NULL);
                    Status = IoStatusBlock.Status;
                }

                /* We're done, break out of the loop */
                break;
            }
        }

        /* If we looped all the partitions, break out */
        if (Entry <= NUM_PARTITION_TABLE_ENTRIES) break;

        /* Nothing found yet, get the partition array again */
        PartitionDescriptor = (PPARTITION_DESCRIPTOR)
                               &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
        for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
        {
            /* Check if this was a container partition (we skipped these) */
            if (IsContainerPartition(PartitionDescriptor->PartitionType))
            {
                /* Update the partition offset */
                Offset.QuadPart = VolumeOffset.QuadPart +
                                  GET_STARTING_SECTOR(PartitionDescriptor) *
                                  SectorSize;

                /* If this was the primary partition, update the volume too */
                if (IsPrimary) VolumeOffset = Offset;
                break;
            }
        }

        /* Check if we already searched all the partitions */
        if (Entry > NUM_PARTITION_TABLE_ENTRIES)
        {
            /* Then we failed to find a good MBR */
            Status = STATUS_BAD_MASTER_BOOT_RECORD;
            break;
        }

        /* Loop the next partitions, which are not primary anymore */
        IsPrimary = FALSE;
    } while (i < PartitionNumber);

    /* Everything done, cleanup */
    if (Buffer) ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
    return Status;
}

xHalIoWritePartitionTable()

NTSTATUS FASTCALL xHalIoWritePartitionTable	(	IN PDEVICE_OBJECT	DeviceObject,
		IN ULONG	SectorSize,
		IN ULONG	SectorsPerTrack,
		IN ULONG	NumberOfHeads,
		IN PDRIVE_LAYOUT_INFORMATION	PartitionBuffer
	)

Definition at line 2385 of file disksup.c.

{
    KEVENT Event;
    IO_STATUS_BLOCK IoStatusBlock;
    PIRP Irp;
    NTSTATUS Status = STATUS_SUCCESS;
    ULONG BufferSize;
    PUSHORT Buffer;
    PPTE Entry;
    PPARTITION_TABLE PartitionTable;
    LARGE_INTEGER Offset, NextOffset, ExtendedOffset, SectorOffset;
    LARGE_INTEGER StartOffset, PartitionLength;
    ULONG i, j;
    CCHAR k;
    BOOLEAN IsEzDrive = FALSE, IsSuperFloppy = FALSE, DoRewrite = FALSE, IsMbr;
    ULONG ConventionalCylinders;
    LONGLONG DiskSize;
    PDISK_LAYOUT DiskLayout = (PDISK_LAYOUT)PartitionBuffer;
    PVOID MbrBuffer;
    UCHAR PartitionType;
    PIO_STACK_LOCATION IoStackLocation;
    PPARTITION_INFORMATION PartitionInfo = PartitionBuffer->PartitionEntry;
    PPARTITION_INFORMATION TableEntry;
    ExtendedOffset.QuadPart = NextOffset.QuadPart = Offset.QuadPart = 0;
    PAGED_CODE();

    /* Normalize the buffer size */
    BufferSize = max(512, SectorSize);

    /* Get the partial drive geometry */
    xHalGetPartialGeometry(DeviceObject, &ConventionalCylinders, &DiskSize);

    /* Check for EZ Drive */
    HalExamineMBR(DeviceObject, BufferSize, 0x55, &MbrBuffer);
    if (MbrBuffer)
    {
        /* EZ Drive found, bias the offset */
        IsEzDrive = TRUE;
        ExFreePoolWithTag(MbrBuffer, TAG_FILE_SYSTEM);
        Offset.QuadPart = 512;
    }

    /* Get the number of bits to shift to multiply by the sector size */
    for (k = 0; k < 32; k++) if ((SectorSize >> k) == 1) break;

    /* Check if there's only one partition */
    if (PartitionBuffer->PartitionCount == 1)
    {
        /* Check if it has no starting offset or hidden sectors */
        if (!(PartitionInfo->StartingOffset.QuadPart) &&
            !(PartitionInfo->HiddenSectors))
        {
            /* Then it's a super floppy */
            IsSuperFloppy = TRUE;

            /* Which also means it must be non-bootable FAT-16 */
            if ((PartitionInfo->PartitionNumber) ||
                (PartitionInfo->PartitionType != PARTITION_FAT_16) ||
                (PartitionInfo->BootIndicator))
            {
                /* It's not, so we fail */
                return STATUS_INVALID_PARAMETER;
            }

            /* Check if it needs a rewrite, and disable EZ drive for sure */
            if (PartitionInfo->RewritePartition) DoRewrite = TRUE;
            IsEzDrive = FALSE;
        }
    }

    /* Count the number of partition tables */
    DiskLayout->TableCount = (PartitionBuffer->PartitionCount + 4 - 1) / 4;

    /* Allocate our partition buffer */
    Buffer = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, TAG_FILE_SYSTEM);
    if (!Buffer) return STATUS_INSUFFICIENT_RESOURCES;

    /* Loop the entries */
    Entry = (PPTE)&Buffer[PARTITION_TABLE_OFFSET];
    for (i = 0; i < DiskLayout->TableCount; i++)
    {
        /* Set if this is the MBR partition */
        IsMbr= (BOOLEAN)!i;

        /* Initialize th event */
        KeInitializeEvent(&Event, NotificationEvent, FALSE);

        /* Build the read IRP */
        Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
                                           DeviceObject,
                                           Buffer,
                                           BufferSize,
                                           &Offset,
                                           &Event,
                                           &IoStatusBlock);
        if (!Irp)
        {
            /* Fail */
            Status = STATUS_INSUFFICIENT_RESOURCES;
            break;
        }

        /* Make sure to disable volume verification */
        IoStackLocation = IoGetNextIrpStackLocation(Irp);
        IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;

        /* Call the driver */
        Status = IoCallDriver(DeviceObject, Irp);
        if (Status == STATUS_PENDING)
        {
            /* Wait for completion */
            KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
            Status = IoStatusBlock.Status;
        }

        /* Check for failure */
        if (!NT_SUCCESS(Status)) break;

        /* If we biased for EZ-Drive, unbias now */
        if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;

        /* Check if this is a normal disk */
        if (!IsSuperFloppy)
        {
            /* Set the boot record signature */
            Buffer[BOOT_SIGNATURE_OFFSET] = BOOT_RECORD_SIGNATURE;

            /* By default, don't require a rewrite */
            DoRewrite = FALSE;

            /* Check if we don't have an offset */
            if (!Offset.QuadPart)
            {
                /* Check if the signature doesn't match */
                if (((PULONG)Buffer)[PARTITION_TABLE_OFFSET / 2 - 1] !=
                    PartitionBuffer->Signature)
                {
                    /* Then write the signature and now we need a rewrite */
                    ((PULONG)Buffer)[PARTITION_TABLE_OFFSET / 2 - 1] =
                        PartitionBuffer->Signature;
                    DoRewrite = TRUE;
                }
            }

            /* Loop the partition table entries */
            PartitionTable = &DiskLayout->PartitionTable[i];
            for (j = 0; j < 4; j++)
            {
                /* Get the current entry and type */
                TableEntry = &PartitionTable->PartitionEntry[j];
                PartitionType = TableEntry->PartitionType;

                /* Check if the entry needs a rewrite */
                if (TableEntry->RewritePartition)
                {
                    /* Then we need one too */
                    DoRewrite = TRUE;

                    /* Save the type and if it's a bootable partition */
                    Entry[j].PartitionType = TableEntry->PartitionType;
                    Entry[j].ActiveFlag = TableEntry->BootIndicator ? 0x80 : 0;

                    /* Make sure it's used */
                    if (PartitionType != PARTITION_ENTRY_UNUSED)
                    {
                        /* Make sure it's not a container (unless primary) */
                        if ((IsMbr) || !(IsContainerPartition(PartitionType)))
                        {
                            /* Use the partition offset */
                            StartOffset.QuadPart = Offset.QuadPart;
                        }
                        else
                        {
                            /* Use the extended logical partition offset */
                            StartOffset.QuadPart = ExtendedOffset.QuadPart;
                        }

                        /* Set the sector offset */
                        SectorOffset.QuadPart = TableEntry->
                                                StartingOffset.QuadPart -
                                                StartOffset.QuadPart;

                        /* Now calculate the starting sector */
                        StartOffset.QuadPart = SectorOffset.QuadPart >> k;
                        Entry[j].StartingSector = StartOffset.LowPart;

                        /* As well as the length */
                        PartitionLength.QuadPart = TableEntry->PartitionLength.
                                                   QuadPart >> k;
                        Entry[j].PartitionLength = PartitionLength.LowPart;

                        /* Calculate the CHS values */
                        HalpCalculateChsValues(&TableEntry->StartingOffset,
                                               &TableEntry->PartitionLength,
                                               k,
                                               SectorsPerTrack,
                                               NumberOfHeads,
                                               ConventionalCylinders,
                                               (PPARTITION_DESCRIPTOR)
                                               &Entry[j]);
                    }
                    else
                    {
                        /* Otherwise set up an empty entry */
                        Entry[j].StartingSector = 0;
                        Entry[j].PartitionLength = 0;
                        Entry[j].StartingTrack = 0;
                        Entry[j].EndingTrack = 0;
                        Entry[j].StartingCylinder = 0;
                        Entry[j].EndingCylinder = 0;
                    }
                }

                /* Check if this is a container partition */
                if (IsContainerPartition(PartitionType))
                {
                    /* Then update the offset to use */
                    NextOffset = TableEntry->StartingOffset;
                }
            }
        }

        /* Check if we need to write back the buffer */
        if (DoRewrite)
        {
            /* We don't need to do this again */
            DoRewrite = FALSE;

            /* Initialize the event */
            KeInitializeEvent(&Event, NotificationEvent, FALSE);

            /* If we unbiased for EZ-Drive, rebias now */
            if ((IsEzDrive) && !(Offset.QuadPart)) Offset.QuadPart = 512;

            /* Build the write IRP */
            Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
                                               DeviceObject,
                                               Buffer,
                                               BufferSize,
                                               &Offset,
                                               &Event,
                                               &IoStatusBlock);
            if (!Irp)
            {
                /* Fail */
                Status = STATUS_INSUFFICIENT_RESOURCES;
                break;
            }

            /* Make sure to disable volume verification */
            IoStackLocation = IoGetNextIrpStackLocation(Irp);
            IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;

            /* Call the driver */
            Status = IoCallDriver(DeviceObject, Irp);
            if (Status == STATUS_PENDING)
            {
                /* Wait for completion */
                KeWaitForSingleObject(&Event,
                                      Executive,
                                      KernelMode,
                                      FALSE,
                                      NULL);
                Status = IoStatusBlock.Status;
            }

            /* Check for failure */
            if (!NT_SUCCESS(Status)) break;

            /* If we biased for EZ-Drive, unbias now */
            if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
        }

        /* Update the partition offset and set the extended offset if needed */
        Offset = NextOffset;
        if (IsMbr) ExtendedOffset = NextOffset;
    }

    /* If we had a buffer, free it, then return status */
    if (Buffer) ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
    return Status;
}

xHalLocateHiberRanges()

VOID NTAPI xHalLocateHiberRanges

(

IN PVOID

MemoryMap

)

Definition at line 196 of file halstub.c.

{
    /* Nothing */
    return;
}

xHalMirrorPhysicalMemory()

NTSTATUS NTAPI xHalMirrorPhysicalMemory	(	IN PHYSICAL_ADDRESS	PhysicalAddress,
		IN LARGE_INTEGER	NumberOfBytes
	)

Definition at line 153 of file halstub.c.

{
    return STATUS_NOT_SUPPORTED;
}

xHalQueryBusSlots()

NTSTATUS NTAPI xHalQueryBusSlots	(	IN PBUS_HANDLER	BusHandler,
		IN ULONG	BufferSize,
		OUT PULONG	SlotNumbers,
		OUT PULONG	ReturnedLength
	)

Definition at line 161 of file halstub.c.

{
    PAGED_CODE();

    return STATUS_NOT_SUPPORTED;
}

xHalQuerySystemInformation()

NTSTATUS NTAPI xHalQuerySystemInformation	(	IN HAL_QUERY_INFORMATION_CLASS	InformationClass,
		IN ULONG	BufferSize,
		IN OUT PVOID	Buffer,
		OUT PULONG	ReturnedLength
	)

Definition at line 184 of file halstub.c.

{
    PAGED_CODE();

    return STATUS_INVALID_LEVEL;
}

xHalReferenceHandler()

VOID FASTCALL xHalReferenceHandler

(

IN PBUS_HANDLER

BusHandler

)

Definition at line 114 of file halstub.c.

{
    /* Nothing */
    return;
}

xHalRegisterBusHandler()

NTSTATUS NTAPI xHalRegisterBusHandler	(	IN INTERFACE_TYPE	InterfaceType,
		IN BUS_DATA_TYPE	ConfigSpace,
		IN ULONG	BusNumber,
		IN INTERFACE_TYPE	ParentInterfaceType,
		IN ULONG	ParentBusNumber,
		IN ULONG	ContextSize,
		IN PINSTALL_BUS_HANDLER	InstallCallback,
		OUT PBUS_HANDLER *	BusHandler
	)

Definition at line 204 of file halstub.c.

{
    PAGED_CODE();

    return STATUS_NOT_SUPPORTED;
}

xHalSetSystemInformation()

NTSTATUS NTAPI xHalSetSystemInformation	(	IN HAL_SET_INFORMATION_CLASS	InformationClass,
		IN ULONG	BufferSize,
		IN PVOID	Buffer
	)

Definition at line 173 of file halstub.c.

{
    PAGED_CODE();

    return STATUS_INVALID_LEVEL;
}

xHalSetWakeAlarm()

VOID NTAPI xHalSetWakeAlarm	(	IN ULONGLONG	AlartTime,
		IN PTIME_FIELDS	TimeFields
	)

Definition at line 220 of file halstub.c.

{
    /* Nothing */
    return;
}

xHalSetWakeEnable()

VOID NTAPI xHalSetWakeEnable

(

IN BOOLEAN

Enable

)

Definition at line 98 of file halstub.c.

{
    /* Nothing */
    return;
}

xHalStartMirroring()

NTSTATUS NTAPI xHalStartMirroring

(

VOID

)

Definition at line 137 of file halstub.c.

{
    PAGED_CODE();

    return STATUS_NOT_SUPPORTED;
}

xHalTranslateBusAddress()

BOOLEAN NTAPI xHalTranslateBusAddress	(	IN INTERFACE_TYPE	InterfaceType,
		IN ULONG	BusNumber,
		IN PHYSICAL_ADDRESS	BusAddress,
		IN OUT PULONG	AddressSpace,
		OUT PPHYSICAL_ADDRESS	TranslatedAddress
	)

Definition at line 229 of file halstub.c.

{
    KeBugCheckEx(HAL_INITIALIZATION_FAILED, 0, 0, 0, 0);

    return FALSE;
}

xHalVectorToIDTEntry()

UCHAR NTAPI xHalVectorToIDTEntry

(

IN ULONG

Vector

)

Definition at line 33 of file halstub.c.

{
    /* Return the vector */
    return (UCHAR)Vector;
}

xKdGetAcpiTablePhase()

PVOID NTAPI xKdGetAcpiTablePhase	(	IN struct _LOADER_PARAMETER_BLOCK *	LoaderBlock,
		IN ULONG	Signature
	)

Definition at line 269 of file halstub.c.

{
    return NULL;
}

xKdReleasePciDeviceForDebugging()

NTSTATUS NTAPI xKdReleasePciDeviceForDebugging

(

IN OUT PDEBUG_DEVICE_DESCRIPTOR

PciDevice

)

Definition at line 262 of file halstub.c.

{
    return STATUS_NOT_IMPLEMENTED;
}

xKdSetupPciDeviceForDebugging()

NTSTATUS NTAPI xKdSetupPciDeviceForDebugging	(	IN PVOID LoaderBlock	OPTIONAL,
		IN OUT PDEBUG_DEVICE_DESCRIPTOR	PciDevice
	)

Definition at line 254 of file halstub.c.

{
    return STATUS_NOT_IMPLEMENTED;
}

xKdUnmapVirtualAddress()

VOID NTAPI xKdUnmapVirtualAddress	(	IN PVOID	VirtualAddress,
		IN ULONG	NumberPages,
		IN BOOLEAN	FlushCurrentTLB
	)

Definition at line 286 of file halstub.c.

{
    /* Nothing */
    return;
}