[mirror_edk2.git] / MdeModulePkg / Universal / Variable / RuntimeDxe / VariableExLib.c

/** @file\r
  Provides variable driver extended services.\r
\r
Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "Variable.h"\r
#include "VariableParsing.h"\r
\r
/**\r
  Finds variable in storage blocks of volatile and non-volatile storage areas.\r
\r
  This code finds variable in storage blocks of volatile and non-volatile storage areas.\r
  If VariableName is an empty string, then we just return the first\r
  qualified variable without comparing VariableName and VendorGuid.\r
\r
  @param[in]  VariableName          Name of the variable to be found.\r
  @param[in]  VendorGuid            Variable vendor GUID to be found.\r
  @param[out] AuthVariableInfo      Pointer to AUTH_VARIABLE_INFO structure for\r
                                    output of the variable found.\r
\r
  @retval EFI_INVALID_PARAMETER     If VariableName is not an empty string,\r
                                    while VendorGuid is NULL.\r
  @retval EFI_SUCCESS               Variable successfully found.\r
  @retval EFI_NOT_FOUND             Variable not found\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VariableExLibFindVariable (\r
  IN  CHAR16                *VariableName,\r
  IN  EFI_GUID              *VendorGuid,\r
  OUT AUTH_VARIABLE_INFO    *AuthVariableInfo\r
  )\r
{\r
  EFI_STATUS                    Status;\r
  VARIABLE_POINTER_TRACK        Variable;\r
  AUTHENTICATED_VARIABLE_HEADER *AuthVariable;\r
\r
  Status = FindVariable (\r
             VariableName,\r
             VendorGuid,\r
             &Variable,\r
             &mVariableModuleGlobal->VariableGlobal,\r
             FALSE\r
             );\r
  if (EFI_ERROR (Status)) {\r
    AuthVariableInfo->Data = NULL;\r
    AuthVariableInfo->DataSize = 0;\r
    AuthVariableInfo->Attributes = 0;\r
    AuthVariableInfo->PubKeyIndex = 0;\r
    AuthVariableInfo->MonotonicCount = 0;\r
    AuthVariableInfo->TimeStamp = NULL;\r
    return Status;\r
  }\r
\r
  AuthVariableInfo->DataSize        = DataSizeOfVariable (Variable.CurrPtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
  AuthVariableInfo->Data            = GetVariableDataPtr (Variable.CurrPtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
  AuthVariableInfo->Attributes      = Variable.CurrPtr->Attributes;\r
  if (mVariableModuleGlobal->VariableGlobal.AuthFormat) {\r
    AuthVariable = (AUTHENTICATED_VARIABLE_HEADER *) Variable.CurrPtr;\r
    AuthVariableInfo->PubKeyIndex     = AuthVariable->PubKeyIndex;\r
    AuthVariableInfo->MonotonicCount  = ReadUnaligned64 (&(AuthVariable->MonotonicCount));\r
    AuthVariableInfo->TimeStamp       = &AuthVariable->TimeStamp;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Finds next variable in storage blocks of volatile and non-volatile storage areas.\r
\r
  This code finds next variable in storage blocks of volatile and non-volatile storage areas.\r
  If VariableName is an empty string, then we just return the first\r
  qualified variable without comparing VariableName and VendorGuid.\r
\r
  @param[in]  VariableName          Name of the variable to be found.\r
  @param[in]  VendorGuid            Variable vendor GUID to be found.\r
  @param[out] AuthVariableInfo      Pointer to AUTH_VARIABLE_INFO structure for\r
                                    output of the next variable.\r
\r
  @retval EFI_INVALID_PARAMETER     If VariableName is not an empty string,\r
                                    while VendorGuid is NULL.\r
  @retval EFI_SUCCESS               Variable successfully found.\r
  @retval EFI_NOT_FOUND             Variable not found\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VariableExLibFindNextVariable (\r
  IN  CHAR16                *VariableName,\r
  IN  EFI_GUID              *VendorGuid,\r
  OUT AUTH_VARIABLE_INFO    *AuthVariableInfo\r
  )\r
{\r
  EFI_STATUS                    Status;\r
  VARIABLE_HEADER               *VariablePtr;\r
  AUTHENTICATED_VARIABLE_HEADER *AuthVariablePtr;\r
  VARIABLE_STORE_HEADER         *VariableStoreHeader[VariableStoreTypeMax];\r
\r
  VariableStoreHeader[VariableStoreTypeVolatile] = (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase;\r
  VariableStoreHeader[VariableStoreTypeHob]      = (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.HobVariableBase;\r
  VariableStoreHeader[VariableStoreTypeNv]       = mNvVariableCache;\r
\r
  Status = VariableServiceGetNextVariableInternal (\r
             VariableName,\r
             VendorGuid,\r
             VariableStoreHeader,\r
             &VariablePtr,\r
             mVariableModuleGlobal->VariableGlobal.AuthFormat\r
             );\r
  if (EFI_ERROR (Status)) {\r
    AuthVariableInfo->VariableName = NULL;\r
    AuthVariableInfo->VendorGuid = NULL;\r
    AuthVariableInfo->Data = NULL;\r
    AuthVariableInfo->DataSize = 0;\r
    AuthVariableInfo->Attributes = 0;\r
    AuthVariableInfo->PubKeyIndex = 0;\r
    AuthVariableInfo->MonotonicCount = 0;\r
    AuthVariableInfo->TimeStamp = NULL;\r
    return Status;\r
  }\r
\r
  AuthVariableInfo->VariableName    = GetVariableNamePtr (VariablePtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
  AuthVariableInfo->VendorGuid      = GetVendorGuidPtr (VariablePtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
  AuthVariableInfo->DataSize        = DataSizeOfVariable (VariablePtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
  AuthVariableInfo->Data            = GetVariableDataPtr (VariablePtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
  AuthVariableInfo->Attributes      = VariablePtr->Attributes;\r
  if (mVariableModuleGlobal->VariableGlobal.AuthFormat) {\r
    AuthVariablePtr = (AUTHENTICATED_VARIABLE_HEADER *) VariablePtr;\r
    AuthVariableInfo->PubKeyIndex     = AuthVariablePtr->PubKeyIndex;\r
    AuthVariableInfo->MonotonicCount  = ReadUnaligned64 (&(AuthVariablePtr->MonotonicCount));\r
    AuthVariableInfo->TimeStamp       = &AuthVariablePtr->TimeStamp;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Update the variable region with Variable information.\r
\r
  @param[in] AuthVariableInfo       Pointer AUTH_VARIABLE_INFO structure for\r
                                    input of the variable.\r
\r
  @retval EFI_SUCCESS               The update operation is success.\r
  @retval EFI_INVALID_PARAMETER     Invalid parameter.\r
  @retval EFI_WRITE_PROTECTED       Variable is write-protected.\r
  @retval EFI_OUT_OF_RESOURCES      There is not enough resource.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VariableExLibUpdateVariable (\r
  IN AUTH_VARIABLE_INFO     *AuthVariableInfo\r
  )\r
{\r
  VARIABLE_POINTER_TRACK    Variable;\r
\r
  FindVariable (AuthVariableInfo->VariableName, AuthVariableInfo->VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);\r
  return UpdateVariable (\r
           AuthVariableInfo->VariableName,\r
           AuthVariableInfo->VendorGuid,\r
           AuthVariableInfo->Data,\r
           AuthVariableInfo->DataSize,\r
           AuthVariableInfo->Attributes,\r
           AuthVariableInfo->PubKeyIndex,\r
           AuthVariableInfo->MonotonicCount,\r
           &Variable,\r
           AuthVariableInfo->TimeStamp\r
           );\r
}\r
\r
/**\r
  Get scratch buffer.\r
\r
  @param[in, out] ScratchBufferSize Scratch buffer size. If input size is greater than\r
                                    the maximum supported buffer size, this value contains\r
                                    the maximum supported buffer size as output.\r
  @param[out]     ScratchBuffer     Pointer to scratch buffer address.\r
\r
  @retval EFI_SUCCESS       Get scratch buffer successfully.\r
  @retval EFI_UNSUPPORTED   If input size is greater than the maximum supported buffer size.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VariableExLibGetScratchBuffer (\r
  IN OUT UINTN      *ScratchBufferSize,\r
  OUT    VOID       **ScratchBuffer\r
  )\r
{\r
  UINTN MaxBufferSize;\r
\r
  MaxBufferSize = mVariableModuleGlobal->ScratchBufferSize;\r
  if (*ScratchBufferSize > MaxBufferSize) {\r
    *ScratchBufferSize = MaxBufferSize;\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  *ScratchBuffer = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase));\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  This function is to check if the remaining variable space is enough to set\r
  all Variables from argument list successfully. The purpose of the check\r
  is to keep the consistency of the Variables to be in variable storage.\r
\r
  Note: Variables are assumed to be in same storage.\r
  The set sequence of Variables will be same with the sequence of VariableEntry from argument list,\r
  so follow the argument sequence to check the Variables.\r
\r
  @param[in] Attributes         Variable attributes for Variable entries.\r
  @param ...                    The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.\r
                                A NULL terminates the list. The VariableSize of\r
                                VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.\r
                                It will be changed to variable total size as output.\r
\r
  @retval TRUE                  Have enough variable space to set the Variables successfully.\r
  @retval FALSE                 No enough variable space to set the Variables successfully.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
VariableExLibCheckRemainingSpaceForConsistency (\r
  IN UINT32                     Attributes,\r
  ...\r
  )\r
{\r
  VA_LIST Marker;\r
  BOOLEAN Return;\r
\r
  VA_START (Marker, Attributes);\r
\r
  Return = CheckRemainingSpaceForConsistencyInternal (Attributes, Marker);\r
\r
  VA_END (Marker);\r
\r
  return Return;\r
}\r
\r
/**\r
  Return TRUE if at OS runtime.\r
\r
  @retval TRUE If at OS runtime.\r
  @retval FALSE If at boot time.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
VariableExLibAtRuntime (\r
  VOID\r
  )\r
{\r
  return AtRuntime ();\r
}\r
Commit	Line	Data
fa0737a8 SZ	1	/** @file\r
	2	Provides variable driver extended services.\r
	3	\r
20a27a64	4	Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>\r
9d510e61	5	SPDX-License-Identifier: BSD-2-Clause-Patent\r
fa0737a8 SZ	6	\r
	7	**/\r
	8	\r
	9	#include "Variable.h"\r
20a27a64	10	#include "VariableParsing.h"\r
fa0737a8 SZ	11	\r
	12	/**\r
	13	Finds variable in storage blocks of volatile and non-volatile storage areas.\r
	14	\r
	15	This code finds variable in storage blocks of volatile and non-volatile storage areas.\r
	16	If VariableName is an empty string, then we just return the first\r
	17	qualified variable without comparing VariableName and VendorGuid.\r
	18	\r
	19	@param[in] VariableName Name of the variable to be found.\r
	20	@param[in] VendorGuid Variable vendor GUID to be found.\r
	21	@param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for\r
	22	output of the variable found.\r
	23	\r
	24	@retval EFI_INVALID_PARAMETER If VariableName is not an empty string,\r
	25	while VendorGuid is NULL.\r
	26	@retval EFI_SUCCESS Variable successfully found.\r
	27	@retval EFI_NOT_FOUND Variable not found\r
	28	\r
	29	**/\r
	30	EFI_STATUS\r
	31	EFIAPI\r
	32	VariableExLibFindVariable (\r
	33	IN CHAR16 *VariableName,\r
	34	IN EFI_GUID *VendorGuid,\r
	35	OUT AUTH_VARIABLE_INFO *AuthVariableInfo\r
	36	)\r
	37	{\r
	38	EFI_STATUS Status;\r
	39	VARIABLE_POINTER_TRACK Variable;\r
	40	AUTHENTICATED_VARIABLE_HEADER *AuthVariable;\r
	41	\r
	42	Status = FindVariable (\r
	43	VariableName,\r
	44	VendorGuid,\r
	45	&Variable,\r
	46	&mVariableModuleGlobal->VariableGlobal,\r
	47	FALSE\r
	48	);\r
	49	if (EFI_ERROR (Status)) {\r
	50	AuthVariableInfo->Data = NULL;\r
	51	AuthVariableInfo->DataSize = 0;\r
	52	AuthVariableInfo->Attributes = 0;\r
	53	AuthVariableInfo->PubKeyIndex = 0;\r
	54	AuthVariableInfo->MonotonicCount = 0;\r
	55	AuthVariableInfo->TimeStamp = NULL;\r
	56	return Status;\r
	57	}\r
	58	\r
04401023 MK	59	AuthVariableInfo->DataSize = DataSizeOfVariable (Variable.CurrPtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
04401023 MK	60	AuthVariableInfo->Data = GetVariableDataPtr (Variable.CurrPtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
fa0737a8 SZ	61	AuthVariableInfo->Attributes = Variable.CurrPtr->Attributes;\r
	62	if (mVariableModuleGlobal->VariableGlobal.AuthFormat) {\r
	63	AuthVariable = (AUTHENTICATED_VARIABLE_HEADER *) Variable.CurrPtr;\r
	64	AuthVariableInfo->PubKeyIndex = AuthVariable->PubKeyIndex;\r
cdc83ccf	65	AuthVariableInfo->MonotonicCount = ReadUnaligned64 (&(AuthVariable->MonotonicCount));\r
fa0737a8 SZ	66	AuthVariableInfo->TimeStamp = &AuthVariable->TimeStamp;\r
	67	}\r
	68	\r
	69	return EFI_SUCCESS;\r
	70	}\r
	71	\r
	72	/**\r
	73	Finds next variable in storage blocks of volatile and non-volatile storage areas.\r
	74	\r
	75	This code finds next variable in storage blocks of volatile and non-volatile storage areas.\r
	76	If VariableName is an empty string, then we just return the first\r
	77	qualified variable without comparing VariableName and VendorGuid.\r
	78	\r
	79	@param[in] VariableName Name of the variable to be found.\r
	80	@param[in] VendorGuid Variable vendor GUID to be found.\r
	81	@param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for\r
	82	output of the next variable.\r
	83	\r
	84	@retval EFI_INVALID_PARAMETER If VariableName is not an empty string,\r
	85	while VendorGuid is NULL.\r
	86	@retval EFI_SUCCESS Variable successfully found.\r
	87	@retval EFI_NOT_FOUND Variable not found\r
	88	\r
	89	**/\r
	90	EFI_STATUS\r
	91	EFIAPI\r
	92	VariableExLibFindNextVariable (\r
	93	IN CHAR16 *VariableName,\r
	94	IN EFI_GUID *VendorGuid,\r
	95	OUT AUTH_VARIABLE_INFO *AuthVariableInfo\r
	96	)\r
	97	{\r
	98	EFI_STATUS Status;\r
	99	VARIABLE_HEADER *VariablePtr;\r
	100	AUTHENTICATED_VARIABLE_HEADER *AuthVariablePtr;\r
f8ff4cca MK	101	VARIABLE_STORE_HEADER *VariableStoreHeader[VariableStoreTypeMax];\r
	102	\r
	103	VariableStoreHeader[VariableStoreTypeVolatile] = (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase;\r
	104	VariableStoreHeader[VariableStoreTypeHob] = (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.HobVariableBase;\r
	105	VariableStoreHeader[VariableStoreTypeNv] = mNvVariableCache;\r
fa0737a8 SZ	106	\r
	107	Status = VariableServiceGetNextVariableInternal (\r
	108	VariableName,\r
	109	VendorGuid,\r
f8ff4cca	110	VariableStoreHeader,\r
04401023 MK	111	&VariablePtr,\r
04401023 MK	112	mVariableModuleGlobal->VariableGlobal.AuthFormat\r
fa0737a8 SZ	113	);\r
	114	if (EFI_ERROR (Status)) {\r
	115	AuthVariableInfo->VariableName = NULL;\r
	116	AuthVariableInfo->VendorGuid = NULL;\r
	117	AuthVariableInfo->Data = NULL;\r
	118	AuthVariableInfo->DataSize = 0;\r
	119	AuthVariableInfo->Attributes = 0;\r
	120	AuthVariableInfo->PubKeyIndex = 0;\r
	121	AuthVariableInfo->MonotonicCount = 0;\r
	122	AuthVariableInfo->TimeStamp = NULL;\r
	123	return Status;\r
	124	}\r
	125	\r
04401023 MK	126	AuthVariableInfo->VariableName = GetVariableNamePtr (VariablePtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
	127	AuthVariableInfo->VendorGuid = GetVendorGuidPtr (VariablePtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
	128	AuthVariableInfo->DataSize = DataSizeOfVariable (VariablePtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
	129	AuthVariableInfo->Data = GetVariableDataPtr (VariablePtr, mVariableModuleGlobal->VariableGlobal.AuthFormat);\r
fa0737a8 SZ	130	AuthVariableInfo->Attributes = VariablePtr->Attributes;\r
	131	if (mVariableModuleGlobal->VariableGlobal.AuthFormat) {\r
	132	AuthVariablePtr = (AUTHENTICATED_VARIABLE_HEADER *) VariablePtr;\r
	133	AuthVariableInfo->PubKeyIndex = AuthVariablePtr->PubKeyIndex;\r
cdc83ccf	134	AuthVariableInfo->MonotonicCount = ReadUnaligned64 (&(AuthVariablePtr->MonotonicCount));\r
fa0737a8 SZ	135	AuthVariableInfo->TimeStamp = &AuthVariablePtr->TimeStamp;\r
	136	}\r
	137	\r
	138	return EFI_SUCCESS;\r
	139	}\r
	140	\r
	141	/**\r
	142	Update the variable region with Variable information.\r
	143	\r
	144	@param[in] AuthVariableInfo Pointer AUTH_VARIABLE_INFO structure for\r
	145	input of the variable.\r
	146	\r
	147	@retval EFI_SUCCESS The update operation is success.\r
	148	@retval EFI_INVALID_PARAMETER Invalid parameter.\r
	149	@retval EFI_WRITE_PROTECTED Variable is write-protected.\r
	150	@retval EFI_OUT_OF_RESOURCES There is not enough resource.\r
	151	\r
	152	**/\r
	153	EFI_STATUS\r
	154	EFIAPI\r
	155	VariableExLibUpdateVariable (\r
	156	IN AUTH_VARIABLE_INFO *AuthVariableInfo\r
	157	)\r
	158	{\r
	159	VARIABLE_POINTER_TRACK Variable;\r
	160	\r
	161	FindVariable (AuthVariableInfo->VariableName, AuthVariableInfo->VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);\r
	162	return UpdateVariable (\r
	163	AuthVariableInfo->VariableName,\r
	164	AuthVariableInfo->VendorGuid,\r
	165	AuthVariableInfo->Data,\r
	166	AuthVariableInfo->DataSize,\r
	167	AuthVariableInfo->Attributes,\r
	168	AuthVariableInfo->PubKeyIndex,\r
	169	AuthVariableInfo->MonotonicCount,\r
	170	&Variable,\r
	171	AuthVariableInfo->TimeStamp\r
	172	);\r
	173	}\r
	174	\r
	175	/**\r
	176	Get scratch buffer.\r
	177	\r
	178	@param[in, out] ScratchBufferSize Scratch buffer size. If input size is greater than\r
	179	the maximum supported buffer size, this value contains\r
	180	the maximum supported buffer size as output.\r
	181	@param[out] ScratchBuffer Pointer to scratch buffer address.\r
	182	\r
	183	@retval EFI_SUCCESS Get scratch buffer successfully.\r
	184	@retval EFI_UNSUPPORTED If input size is greater than the maximum supported buffer size.\r
	185	\r
	186	**/\r
	187	EFI_STATUS\r
	188	EFIAPI\r
	189	VariableExLibGetScratchBuffer (\r
	190	IN OUT UINTN *ScratchBufferSize,\r
	191	OUT VOID **ScratchBuffer\r
	192	)\r
	193	{\r
	194	UINTN MaxBufferSize;\r
	195	\r
	196	MaxBufferSize = mVariableModuleGlobal->ScratchBufferSize;\r
	197	if (*ScratchBufferSize > MaxBufferSize) {\r
	198	*ScratchBufferSize = MaxBufferSize;\r
199	return EFI_UNSUPPORTED;\r
200	}\r
201	\r
202	ScratchBuffer = GetEndPointer ((VARIABLE_STORE_HEADER ) ((UINTN) mVariableModuleGlobal->VariableGlobal.VolatileVariableBase));\r
203	return EFI_SUCCESS;\r
204	}\r
205	\r
206	/**\r
207	This function is to check if the remaining variable space is enough to set\r
208	all Variables from argument list successfully. The purpose of the check\r
209	is to keep the consistency of the Variables to be in variable storage.\r
210	\r
211	Note: Variables are assumed to be in same storage.\r
212	The set sequence of Variables will be same with the sequence of VariableEntry from argument list,\r
213	so follow the argument sequence to check the Variables.\r
214	\r
215	@param[in] Attributes Variable attributes for Variable entries.\r
216	@param ... The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.\r
217	A NULL terminates the list. The VariableSize of\r
218	VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.\r
219	It will be changed to variable total size as output.\r
220	\r
221	@retval TRUE Have enough variable space to set the Variables successfully.\r
222	@retval FALSE No enough variable space to set the Variables successfully.\r
223	\r
224	**/\r
225	BOOLEAN\r
226	EFIAPI\r
227	VariableExLibCheckRemainingSpaceForConsistency (\r
228	IN UINT32 Attributes,\r
229	...\r
230	)\r
231	{\r
232	VA_LIST Marker;\r
233	BOOLEAN Return;\r
234	\r
235	VA_START (Marker, Attributes);\r
236	\r
237	Return = CheckRemainingSpaceForConsistencyInternal (Attributes, Marker);\r
238	\r
239	VA_END (Marker);\r
240	\r
241	return Return;\r
242	}\r
243	\r
244	/**\r
245	Return TRUE if at OS runtime.\r
246	\r
247	@retval TRUE If at OS runtime.\r
248	@retval FALSE If at boot time.\r
249	\r
250	**/\r
251	BOOLEAN\r
252	EFIAPI\r
253	VariableExLibAtRuntime (\r
254	VOID\r
255	)\r
256	{\r
257	return AtRuntime ();\r
258	}\r