| /*++ | |
| Copyright (c) 2006, Intel Corporation | |
| All rights reserved. This program and the accompanying materials | |
| are licensed and made available under the terms and conditions of the BSD License | |
| which accompanies this distribution. The full text of the license may be found at | |
| http://opensource.org/licenses/bsd-license.php | |
| THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| Module Name: | |
| EmuVariable.c | |
| Abstract: | |
| Revision History | |
| --*/ | |
| #include "Variable.h" | |
| // | |
| // Don't use module globals after the SetVirtualAddress map is signaled | |
| // | |
| ESAL_VARIABLE_GLOBAL *mVariableModuleGlobal; | |
| UINT32 | |
| EFIAPI | |
| ArrayLength ( | |
| IN CHAR16 *String | |
| ) | |
| /*++ | |
| Routine Description: | |
| Determine the length of null terminated char16 array. | |
| Arguments: | |
| String Null-terminated CHAR16 array pointer. | |
| Returns: | |
| UINT32 Number of bytes in the string, including the double NULL at the end; | |
| --*/ | |
| { | |
| UINT32 Count; | |
| if (NULL == String) { | |
| return 0; | |
| } | |
| Count = 0; | |
| while (0 != String[Count]) { | |
| Count++; | |
| } | |
| return (Count * 2) + 2; | |
| } | |
| UINTN | |
| EFIAPI | |
| GetPadSize ( | |
| IN UINTN Value | |
| ) | |
| /*++ | |
| Routine Description: | |
| This function return the pad size for alignment | |
| Arguments: | |
| Value The value need to align | |
| Returns: | |
| Pad size for value | |
| --*/ | |
| { | |
| // | |
| // If alignment is 0 or 1, means no alignment required | |
| // | |
| if (ALIGNMENT == 0 || ALIGNMENT == 1) { | |
| return 0; | |
| } | |
| return ALIGNMENT - (Value % ALIGNMENT); | |
| } | |
| VARIABLE_STORE_STATUS | |
| EFIAPI | |
| GetVariableStoreStatus ( | |
| IN VARIABLE_STORE_HEADER *VarStoreHeader | |
| ) | |
| /*++ | |
| Routine Description: | |
| This code gets the pointer to the variable name. | |
| Arguments: | |
| VarStoreHeader Pointer to the Variable Store Header. | |
| Returns: | |
| EfiHealthy Variable store is healthy | |
| EfiRaw Variable store is raw | |
| EfiInvalid Variable store is invalid | |
| --*/ | |
| { | |
| if (VarStoreHeader->Signature == VARIABLE_STORE_SIGNATURE && | |
| VarStoreHeader->Format == VARIABLE_STORE_FORMATTED && | |
| VarStoreHeader->State == VARIABLE_STORE_HEALTHY | |
| ) { | |
| return EfiValid; | |
| } else if (VarStoreHeader->Signature == 0xffffffff && | |
| VarStoreHeader->Size == 0xffffffff && | |
| VarStoreHeader->Format == 0xff && | |
| VarStoreHeader->State == 0xff | |
| ) { | |
| return EfiRaw; | |
| } else { | |
| return EfiInvalid; | |
| } | |
| } | |
| UINT8 * | |
| EFIAPI | |
| GetVariableDataPtr ( | |
| IN VARIABLE_HEADER *Variable | |
| ) | |
| /*++ | |
| Routine Description: | |
| This code gets the pointer to the variable data. | |
| Arguments: | |
| Variable Pointer to the Variable Header. | |
| Returns: | |
| UINT8* Pointer to Variable Data | |
| --*/ | |
| { | |
| if (Variable->StartId != VARIABLE_DATA) { | |
| return NULL; | |
| } | |
| // | |
| // Be careful about pad size for alignment | |
| // | |
| return (UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (Variable) + Variable->NameSize + GetPadSize (Variable->NameSize)); | |
| } | |
| VARIABLE_HEADER * | |
| EFIAPI | |
| GetNextVariablePtr ( | |
| IN VARIABLE_HEADER *Variable | |
| ) | |
| /*++ | |
| Routine Description: | |
| This code gets the pointer to the next variable header. | |
| Arguments: | |
| Variable Pointer to the Variable Header. | |
| Returns: | |
| VARIABLE_HEADER* Pointer to next variable header. | |
| --*/ | |
| { | |
| VARIABLE_HEADER *VarHeader; | |
| if (Variable->StartId != VARIABLE_DATA) { | |
| return NULL; | |
| } | |
| // | |
| // Be careful about pad size for alignment | |
| // | |
| VarHeader = (VARIABLE_HEADER *) (GetVariableDataPtr (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize)); | |
| if (VarHeader->StartId != VARIABLE_DATA || | |
| (sizeof (VARIABLE_HEADER) + VarHeader->DataSize + VarHeader->NameSize) > MAX_VARIABLE_SIZE | |
| ) { | |
| return NULL; | |
| } | |
| return VarHeader; | |
| } | |
| VARIABLE_HEADER * | |
| EFIAPI | |
| GetEndPointer ( | |
| IN VARIABLE_STORE_HEADER *VolHeader | |
| ) | |
| /*++ | |
| Routine Description: | |
| This code gets the pointer to the last variable memory pointer byte | |
| Arguments: | |
| Variable Pointer to the Variable Header. | |
| Returns: | |
| VARIABLE_HEADER* Pointer to last unavailable Variable Header | |
| --*/ | |
| { | |
| // | |
| // The end of variable store | |
| // | |
| return (VARIABLE_HEADER *) ((UINTN) VolHeader + VolHeader->Size); | |
| } | |
| EFI_STATUS | |
| EFIAPI | |
| FindVariable ( | |
| IN CHAR16 *VariableName, | |
| IN EFI_GUID *VendorGuid, | |
| OUT VARIABLE_POINTER_TRACK *PtrTrack, | |
| IN VARIABLE_GLOBAL *Global | |
| ) | |
| /*++ | |
| Routine Description: | |
| This code finds variable in storage blocks (Volatile or Non-Volatile) | |
| Arguments: | |
| VariableName Name of the variable to be found | |
| VendorGuid Vendor GUID to be found. | |
| PtrTrack Variable Track Pointer structure that contains | |
| Variable Information. | |
| Contains the pointer of Variable header. | |
| Global VARIABLE_GLOBAL pointer | |
| Returns: | |
| EFI STATUS | |
| --*/ | |
| { | |
| VARIABLE_HEADER *Variable[2]; | |
| VARIABLE_STORE_HEADER *VariableStoreHeader[2]; | |
| UINTN Index; | |
| // | |
| // 0: Non-Volatile, 1: Volatile | |
| // | |
| VariableStoreHeader[0] = (VARIABLE_STORE_HEADER *) ((UINTN) Global->NonVolatileVariableBase); | |
| VariableStoreHeader[1] = (VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase); | |
| // | |
| // Start Pointers for the variable. | |
| // Actual Data Pointer where data can be written. | |
| // | |
| Variable[0] = (VARIABLE_HEADER *) (VariableStoreHeader[0] + 1); | |
| Variable[1] = (VARIABLE_HEADER *) (VariableStoreHeader[1] + 1); | |
| if (VariableName[0] != 0 && VendorGuid == NULL) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Find the variable by walk through non-volatile and volatile variable store | |
| // | |
| for (Index = 0; Index < 2; Index++) { | |
| PtrTrack->StartPtr = (VARIABLE_HEADER *) (VariableStoreHeader[Index] + 1); | |
| PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]); | |
| while ((Variable[Index] != NULL) && (Variable[Index] <= GetEndPointer (VariableStoreHeader[Index]))) { | |
| if (Variable[Index]->StartId == VARIABLE_DATA && Variable[Index]->State == VAR_ADDED) { | |
| if (!(EfiAtRuntime () && !(Variable[Index]->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) { | |
| if (VariableName[0] == 0) { | |
| PtrTrack->CurrPtr = Variable[Index]; | |
| PtrTrack->Volatile = (BOOLEAN) Index; | |
| return EFI_SUCCESS; | |
| } else { | |
| if (CompareGuid (VendorGuid, &Variable[Index]->VendorGuid)) { | |
| if (!CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable[Index]), ArrayLength (VariableName))) { | |
| PtrTrack->CurrPtr = Variable[Index]; | |
| PtrTrack->Volatile = (BOOLEAN) Index; | |
| return EFI_SUCCESS; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| Variable[Index] = GetNextVariablePtr (Variable[Index]); | |
| } | |
| } | |
| PtrTrack->CurrPtr = NULL; | |
| return EFI_NOT_FOUND; | |
| } | |
| EFI_STATUS | |
| EFIAPI | |
| GetVariable ( | |
| IN CHAR16 *VariableName, | |
| IN EFI_GUID * VendorGuid, | |
| OUT UINT32 *Attributes OPTIONAL, | |
| IN OUT UINTN *DataSize, | |
| OUT VOID *Data, | |
| IN VARIABLE_GLOBAL * Global, | |
| IN UINT32 Instance | |
| ) | |
| /*++ | |
| Routine Description: | |
| This code finds variable in storage blocks (Volatile or Non-Volatile) | |
| Arguments: | |
| VariableName Name of Variable to be found | |
| VendorGuid Variable vendor GUID | |
| Attributes OPTIONAL Attribute value of the variable found | |
| DataSize Size of Data found. If size is less than the | |
| data, this value contains the required size. | |
| Data Data pointer | |
| Global Pointer to VARIABLE_GLOBAL structure | |
| Instance Instance of the Firmware Volume. | |
| Returns: | |
| EFI STATUS | |
| --*/ | |
| { | |
| VARIABLE_POINTER_TRACK Variable; | |
| UINTN VarDataSize; | |
| EFI_STATUS Status; | |
| if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Find existing variable | |
| // | |
| Status = FindVariable (VariableName, VendorGuid, &Variable, Global); | |
| if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| // | |
| // Get data size | |
| // | |
| VarDataSize = Variable.CurrPtr->DataSize; | |
| if (*DataSize >= VarDataSize) { | |
| CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize); | |
| if (Attributes) { | |
| *Attributes = Variable.CurrPtr->Attributes; | |
| } | |
| *DataSize = VarDataSize; | |
| return EFI_SUCCESS; | |
| } else { | |
| *DataSize = VarDataSize; | |
| return EFI_BUFFER_TOO_SMALL; | |
| } | |
| } | |
| EFI_STATUS | |
| EFIAPI | |
| GetNextVariableName ( | |
| IN OUT UINTN *VariableNameSize, | |
| IN OUT CHAR16 *VariableName, | |
| IN OUT EFI_GUID *VendorGuid, | |
| IN VARIABLE_GLOBAL *Global, | |
| IN UINT32 Instance | |
| ) | |
| /*++ | |
| Routine Description: | |
| This code Finds the Next available variable | |
| Arguments: | |
| VariableNameSize Size of the variable | |
| VariableName Pointer to variable name | |
| VendorGuid Variable Vendor Guid | |
| Global VARIABLE_GLOBAL structure pointer. | |
| Instance FV instance | |
| Returns: | |
| EFI STATUS | |
| --*/ | |
| { | |
| VARIABLE_POINTER_TRACK Variable; | |
| UINTN VarNameSize; | |
| EFI_STATUS Status; | |
| if (VariableNameSize == NULL || VendorGuid == NULL) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| Status = FindVariable (VariableName, VendorGuid, &Variable, Global); | |
| if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| while (TRUE) { | |
| if (VariableName[0] != 0) { | |
| // | |
| // If variable name is not NULL, get next variable | |
| // | |
| Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr); | |
| } | |
| // | |
| // If both volatile and non-volatile variable store are parsed, | |
| // return not found | |
| // | |
| if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) { | |
| Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1)); | |
| if (Variable.Volatile) { | |
| Variable.StartPtr = (VARIABLE_HEADER *) ((UINTN) (Global->VolatileVariableBase + sizeof (VARIABLE_STORE_HEADER))); | |
| Variable.EndPtr = (VARIABLE_HEADER *) GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase)); | |
| } else { | |
| return EFI_NOT_FOUND; | |
| } | |
| Variable.CurrPtr = Variable.StartPtr; | |
| if (Variable.CurrPtr->StartId != VARIABLE_DATA) { | |
| continue; | |
| } | |
| } | |
| // | |
| // Variable is found | |
| // | |
| if (Variable.CurrPtr->StartId == VARIABLE_DATA && Variable.CurrPtr->State == VAR_ADDED) { | |
| if (!(EfiAtRuntime () && !(Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) { | |
| VarNameSize = Variable.CurrPtr->NameSize; | |
| if (VarNameSize <= *VariableNameSize) { | |
| CopyMem ( | |
| VariableName, | |
| GET_VARIABLE_NAME_PTR (Variable.CurrPtr), | |
| VarNameSize | |
| ); | |
| CopyMem ( | |
| VendorGuid, | |
| &Variable.CurrPtr->VendorGuid, | |
| sizeof (EFI_GUID) | |
| ); | |
| Status = EFI_SUCCESS; | |
| } else { | |
| Status = EFI_BUFFER_TOO_SMALL; | |
| } | |
| *VariableNameSize = VarNameSize; | |
| return Status; | |
| } | |
| } | |
| } | |
| return EFI_NOT_FOUND; | |
| } | |
| EFI_STATUS | |
| EFIAPI | |
| SetVariable ( | |
| IN CHAR16 *VariableName, | |
| IN EFI_GUID *VendorGuid, | |
| IN UINT32 Attributes, | |
| IN UINTN DataSize, | |
| IN VOID *Data, | |
| IN VARIABLE_GLOBAL *Global, | |
| IN UINTN *VolatileOffset, | |
| IN UINTN *NonVolatileOffset, | |
| IN UINT32 Instance | |
| ) | |
| /*++ | |
| Routine Description: | |
| This code sets variable in storage blocks (Volatile or Non-Volatile) | |
| Arguments: | |
| VariableName Name of Variable to be found | |
| VendorGuid Variable vendor GUID | |
| Attributes Attribute value of the variable found | |
| DataSize Size of Data found. If size is less than the | |
| data, this value contains the required size. | |
| Data Data pointer | |
| Global Pointer to VARIABLE_GLOBAL structure | |
| VolatileOffset The offset of last volatile variable | |
| NonVolatileOffset The offset of last non-volatile variable | |
| Instance Instance of the Firmware Volume. | |
| Returns: | |
| EFI STATUS | |
| --*/ | |
| { | |
| VARIABLE_POINTER_TRACK Variable; | |
| EFI_STATUS Status; | |
| VARIABLE_HEADER *NextVariable; | |
| UINTN VarNameSize; | |
| UINTN VarNameOffset; | |
| UINTN VarDataOffset; | |
| UINTN VarSize; | |
| if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| Status = FindVariable (VariableName, VendorGuid, &Variable, Global); | |
| if (Status == EFI_INVALID_PARAMETER) { | |
| return Status; | |
| } | |
| // | |
| // The size of the VariableName, including the Unicode Null in bytes plus | |
| // the DataSize is limited to maximum size of MAX_VARIABLE_SIZE (1024) bytes. | |
| // | |
| else if (sizeof (VARIABLE_HEADER) + (ArrayLength (VariableName) + DataSize) > MAX_VARIABLE_SIZE) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Make sure if runtime bit is set, boot service bit is set also | |
| // | |
| else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS | |
| ) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Runtime but Attribute is not Runtime | |
| // | |
| else if (EfiAtRuntime () && Attributes && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Cannot set volatile variable in Runtime | |
| // | |
| else if (EfiAtRuntime () && Attributes && !(Attributes & EFI_VARIABLE_NON_VOLATILE)) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Setting a data variable with no access, or zero DataSize attributes | |
| // specified causes it to be deleted. | |
| // | |
| else if (DataSize == 0 || Attributes == 0) { | |
| if (!EFI_ERROR (Status)) { | |
| Variable.CurrPtr->State &= VAR_DELETED; | |
| return EFI_SUCCESS; | |
| } | |
| return EFI_NOT_FOUND; | |
| } else { | |
| if (!EFI_ERROR (Status)) { | |
| // | |
| // If the variable is marked valid and the same data has been passed in | |
| // then return to the caller immediately. | |
| // | |
| if (Variable.CurrPtr->DataSize == DataSize && | |
| !CompareMem (Data, GetVariableDataPtr (Variable.CurrPtr), DataSize) | |
| ) { | |
| return EFI_SUCCESS; | |
| } else if (Variable.CurrPtr->State == VAR_ADDED) { | |
| // | |
| // Mark the old variable as in delete transition | |
| // | |
| Variable.CurrPtr->State &= VAR_IN_DELETED_TRANSITION; | |
| } | |
| } | |
| // | |
| // Create a new variable and copy the data. | |
| // | |
| VarNameOffset = sizeof (VARIABLE_HEADER); | |
| VarNameSize = ArrayLength (VariableName); | |
| VarDataOffset = VarNameOffset + VarNameSize + GetPadSize (VarNameSize); | |
| VarSize = VarDataOffset + DataSize + GetPadSize (DataSize); | |
| if (Attributes & EFI_VARIABLE_NON_VOLATILE) { | |
| if ((UINT32) (VarSize +*NonVolatileOffset) > | |
| ((VARIABLE_STORE_HEADER *) ((UINTN) (Global->NonVolatileVariableBase)))->Size | |
| ) { | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| NextVariable = (VARIABLE_HEADER *) (UINT8 *) (*NonVolatileOffset + (UINTN) Global->NonVolatileVariableBase); | |
| *NonVolatileOffset = *NonVolatileOffset + VarSize; | |
| } else { | |
| if (EfiAtRuntime ()) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| if ((UINT32) (VarSize +*VolatileOffset) > | |
| ((VARIABLE_STORE_HEADER *) ((UINTN) (Global->VolatileVariableBase)))->Size | |
| ) { | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| NextVariable = (VARIABLE_HEADER *) (UINT8 *) (*VolatileOffset + (UINTN) Global->VolatileVariableBase); | |
| *VolatileOffset = *VolatileOffset + VarSize; | |
| } | |
| NextVariable->StartId = VARIABLE_DATA; | |
| NextVariable->Attributes = Attributes; | |
| NextVariable->State = VAR_ADDED; | |
| NextVariable->Reserved = 0; | |
| // | |
| // There will be pad bytes after Data, the NextVariable->NameSize and | |
| // NextVariable->NameSize should not include pad size so that variable | |
| // service can get actual size in GetVariable | |
| // | |
| NextVariable->NameSize = (UINT32)VarNameSize; | |
| NextVariable->DataSize = (UINT32)DataSize; | |
| CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID)); | |
| CopyMem ( | |
| (UINT8 *) ((UINTN) NextVariable + VarNameOffset), | |
| VariableName, | |
| VarNameSize | |
| ); | |
| CopyMem ( | |
| (UINT8 *) ((UINTN) NextVariable + VarDataOffset), | |
| Data, | |
| DataSize | |
| ); | |
| // | |
| // Mark the old variable as deleted | |
| // | |
| if (!EFI_ERROR (Status)) { | |
| Variable.CurrPtr->State &= VAR_DELETED; | |
| } | |
| } | |
| return EFI_SUCCESS; | |
| } | |
| EFI_STATUS | |
| EFIAPI | |
| InitializeVariableStore ( | |
| OUT EFI_PHYSICAL_ADDRESS *VariableBase, | |
| OUT UINTN *LastVariableOffset | |
| ) | |
| /*++ | |
| Routine Description: | |
| This function initializes variable store | |
| Arguments: | |
| Returns: | |
| --*/ | |
| { | |
| VARIABLE_STORE_HEADER *VariableStore; | |
| // | |
| // Allocate memory for volatile variable store | |
| // | |
| VariableStore = (VARIABLE_STORE_HEADER *) AllocateRuntimePool ( | |
| VARIABLE_STORE_SIZE | |
| ); | |
| if (NULL == VariableStore) { | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| SetMem (VariableStore, VARIABLE_STORE_SIZE, 0xff); | |
| // | |
| // Variable Specific Data | |
| // | |
| *VariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VariableStore; | |
| *LastVariableOffset = sizeof (VARIABLE_STORE_HEADER); | |
| VariableStore->Signature = VARIABLE_STORE_SIGNATURE; | |
| VariableStore->Size = VARIABLE_STORE_SIZE; | |
| VariableStore->Format = VARIABLE_STORE_FORMATTED; | |
| VariableStore->State = VARIABLE_STORE_HEALTHY; | |
| VariableStore->Reserved = 0; | |
| VariableStore->Reserved1 = 0; | |
| return EFI_SUCCESS; | |
| } | |
| EFI_STATUS | |
| EFIAPI | |
| VariableCommonInitialize ( | |
| IN EFI_HANDLE ImageHandle, | |
| IN EFI_SYSTEM_TABLE *SystemTable | |
| ) | |
| /*++ | |
| Routine Description: | |
| This function does common initialization for variable services | |
| Arguments: | |
| Returns: | |
| --*/ | |
| { | |
| EFI_STATUS Status; | |
| // | |
| // Allocate memory for mVariableModuleGlobal | |
| // | |
| mVariableModuleGlobal = (ESAL_VARIABLE_GLOBAL *) AllocateRuntimePool ( | |
| sizeof (ESAL_VARIABLE_GLOBAL) | |
| ); | |
| if (NULL == mVariableModuleGlobal) { | |
| return EFI_OUT_OF_RESOURCES; | |
| } | |
| // | |
| // Intialize volatile variable store | |
| // | |
| Status = InitializeVariableStore ( | |
| &mVariableModuleGlobal->VariableBase[Physical].VolatileVariableBase, | |
| &mVariableModuleGlobal->VolatileLastVariableOffset | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| // | |
| // Intialize non volatile variable store | |
| // | |
| Status = InitializeVariableStore ( | |
| &mVariableModuleGlobal->VariableBase[Physical].NonVolatileVariableBase, | |
| &mVariableModuleGlobal->NonVolatileLastVariableOffset | |
| ); | |
| return Status; | |
| } |