From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by mx.groups.io with SMTP id smtpd.web10.2821.1571212363397897737 for ; Wed, 16 Oct 2019 00:52:43 -0700 Authentication-Results: mx.groups.io; dkim=missing; spf=pass (domain: intel.com, ip: 192.55.52.43, mailfrom: hao.a.wu@intel.com) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Oct 2019 00:52:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,303,1566889200"; d="scan'208";a="347347705" Received: from fmsmsx104.amr.corp.intel.com ([10.18.124.202]) by orsmga004.jf.intel.com with ESMTP; 16 Oct 2019 00:52:41 -0700 Received: from fmsmsx113.amr.corp.intel.com (10.18.116.7) by fmsmsx104.amr.corp.intel.com (10.18.124.202) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 16 Oct 2019 00:52:41 -0700 Received: from shsmsx153.ccr.corp.intel.com (10.239.6.53) by FMSMSX113.amr.corp.intel.com (10.18.116.7) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 16 Oct 2019 00:52:41 -0700 Received: from shsmsx104.ccr.corp.intel.com ([169.254.5.166]) by SHSMSX153.ccr.corp.intel.com ([10.239.6.53]) with mapi id 14.03.0439.000; Wed, 16 Oct 2019 15:52:37 +0800 From: "Wu, Hao A" To: "Kubacki, Michael A" , "devel@edk2.groups.io" CC: "Bi, Dandan" , Ard Biesheuvel , "Dong, Eric" , Laszlo Ersek , "Gao, Liming" , "Kinney, Michael D" , "Ni, Ray" , "Wang, Jian J" , "Yao, Jiewen" Subject: Re: [PATCH V4 01/10] MdeModulePkg/Variable: Consolidate common parsing functions Thread-Topic: [PATCH V4 01/10] MdeModulePkg/Variable: Consolidate common parsing functions Thread-Index: AQHVgudiDMUKP+c8V0Giwo0cX5bvnadc5xrQ Date: Wed, 16 Oct 2019 07:52:37 +0000 Message-ID: References: <20191014233001.33024-1-michael.a.kubacki@intel.com> <20191014233001.33024-2-michael.a.kubacki@intel.com> In-Reply-To: <20191014233001.33024-2-michael.a.kubacki@intel.com> Accept-Language: zh-CN, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] MIME-Version: 1.0 Return-Path: hao.a.wu@intel.com Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable > -----Original Message----- > From: Kubacki, Michael A > Sent: Tuesday, October 15, 2019 7:30 AM > To: devel@edk2.groups.io > Cc: Bi, Dandan; Ard Biesheuvel; Dong, Eric; Laszlo Ersek; Gao, Liming; Ki= nney, > Michael D; Ni, Ray; Wang, Jian J; Wu, Hao A; Yao, Jiewen > Subject: [PATCH V4 01/10] MdeModulePkg/Variable: Consolidate common > parsing functions >=20 > This change moves the following functions into a dedicated file > so they may be used in other variable files as needed. These are > commonly needed for basic variable data structure parsing > operations. The functions are grouped together in VariableParsing.c > to support cohesiveness for these operations in the file. > Furthermore, it reduces the overall size of the common Variable.c > file. >=20 > * DataSizeOfVariable () > * FindVariableEx () > * GetEndPointer () > * GetNextVariablePtr () > * GetStartPointer () > * GetVariableDataOffset () > * GetVariableDataPtr () > * GetVariableHeaderSize () > * GetVariableNamePtr () > * GetVariableStoreStatus () > * GetVendorGuidPtr () > * IsValidVariableHeader () > * NameSizeOfVariable () > * SetDataSizeOfVariable () > * SetNameSizeOfVariable () > * UpdateVariableInfo () > * VariableCompareTimeStampInternal () > * VariableServiceGetNextVariableInternal () Since all my previous comments have been addressed, the patch looks good to= me: Reviewed-by: Hao A Wu Best Regards, Hao Wu >=20 > Cc: Dandan Bi > Cc: Ard Biesheuvel > Cc: Eric Dong > Cc: Laszlo Ersek > Cc: Liming Gao > Cc: Michael D Kinney > Cc: Ray Ni > Cc: Jian J Wang > Cc: Hao A Wu > Cc: Jiewen Yao > Signed-off-by: Michael Kubacki > --- > MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf > | 2 + > MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf | = 2 > + >=20 > MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf > | 2 + > MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h | 11= 9 ---- > MdeModulePkg/Universal/Variable/RuntimeDxe/VariableParsing.h | 30= 6 > ++++++++ > MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c | 72= 6 +-- > ---------------- > MdeModulePkg/Universal/Variable/RuntimeDxe/VariableExLib.c | = 3 +- > MdeModulePkg/Universal/Variable/RuntimeDxe/VariableParsing.c | 73= 1 > ++++++++++++++++++++ > MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c | = 1 + > 9 files changed, 1047 insertions(+), 845 deletions(-) >=20 > diff --git > a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf > index 641376c9c5..c35e5fe787 100644 > --- > a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf > +++ > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf > @@ -36,6 +36,8 @@ > Variable.c > VariableDxe.c > Variable.h > + VariableParsing.c > + VariableParsing.h > PrivilegePolymorphic.h > Measurement.c > TcgMorLockDxe.c > diff --git > a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf > index 0a160d269d..626738b9c7 100644 > --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf > +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf > @@ -45,6 +45,8 @@ > Variable.c > VariableTraditionalMm.c > VariableSmm.c > + VariableParsing.c > + VariableParsing.h > VarCheck.c > Variable.h > PrivilegePolymorphic.h > diff --git > a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.i > nf > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm. > inf > index 21bc81163b..ff714b193a 100644 > --- > a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.i > nf > +++ > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm. > inf > @@ -45,6 +45,8 @@ > Variable.c > VariableSmm.c > VariableStandaloneMm.c > + VariableParsing.c > + VariableParsing.h > VarCheck.c > Variable.h > PrivilegePolymorphic.h > diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h > b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h > index 9eac43759f..fb574b2e32 100644 > --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h > +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h > @@ -179,89 +179,6 @@ FindVariable ( > IN BOOLEAN IgnoreRtCheck > ); >=20 > -/** > - > - Gets the pointer to the end of the variable storage area. > - > - This function gets pointer to the end of the variable storage > - area, according to the input variable store header. > - > - @param VarStoreHeader Pointer to the Variable Store Header. > - > - @return Pointer to the end of the variable storage area. > - > -**/ > -VARIABLE_HEADER * > -GetEndPointer ( > - IN VARIABLE_STORE_HEADER *VarStoreHeader > - ); > - > -/** > - This code gets the size of variable header. > - > - @return Size of variable header in bytes in type UINTN. > - > -**/ > -UINTN > -GetVariableHeaderSize ( > - VOID > - ); > - > -/** > - > - This code gets the pointer to the variable name. > - > - @param Variable Pointer to the Variable Header. > - > - @return Pointer to Variable Name which is Unicode encoding. > - > -**/ > -CHAR16 * > -GetVariableNamePtr ( > - IN VARIABLE_HEADER *Variable > - ); > - > -/** > - This code gets the pointer to the variable guid. > - > - @param Variable Pointer to the Variable Header. > - > - @return A EFI_GUID* pointer to Vendor Guid. > - > -**/ > -EFI_GUID * > -GetVendorGuidPtr ( > - IN VARIABLE_HEADER *Variable > - ); > - > -/** > - > - This code gets the pointer to the variable data. > - > - @param Variable Pointer to the Variable Header. > - > - @return Pointer to Variable Data. > - > -**/ > -UINT8 * > -GetVariableDataPtr ( > - IN VARIABLE_HEADER *Variable > - ); > - > -/** > - > - This code gets the size of variable data. > - > - @param Variable Pointer to the Variable Header. > - > - @return Size of variable in bytes. > - > -**/ > -UINTN > -DataSizeOfVariable ( > - IN VARIABLE_HEADER *Variable > - ); > - > /** > This function is to check if the remaining variable space is enough to= set > all Variables from argument list successfully. The purpose of the chec= k > @@ -450,17 +367,6 @@ ReclaimForOS( > VOID > ); >=20 > -/** > - Get non-volatile maximum variable size. > - > - @return Non-volatile maximum variable size. > - > -**/ > -UINTN > -GetNonVolatileMaxVariableSize ( > - VOID > - ); > - > /** > Get maximum variable size, covering both non-volatile and volatile var= iables. >=20 > @@ -546,31 +452,6 @@ VariableServiceGetVariable ( > OUT VOID *Data OPTIONAL > ); >=20 > -/** > - This code Finds the Next available variable. > - > - Caution: This function may receive untrusted input. > - This function may be invoked in SMM mode. This function will do basic > validation, before parse the data. > - > - @param[in] VariableName Pointer to variable name. > - @param[in] VendorGuid Variable Vendor Guid. > - @param[out] VariablePtr Pointer to variable header address. > - > - @retval EFI_SUCCESS The function completed successfully. > - @retval EFI_NOT_FOUND The next variable was not found. > - @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, > while VendorGuid is NULL. > - @retval EFI_INVALID_PARAMETER The input values of VariableName and > VendorGuid are not a name and > - GUID of an existing variable. > - > -**/ > -EFI_STATUS > -EFIAPI > -VariableServiceGetNextVariableInternal ( > - IN CHAR16 *VariableName, > - IN EFI_GUID *VendorGuid, > - OUT VARIABLE_HEADER **VariablePtr > - ); > - > /** >=20 > This code Finds the Next available variable. > diff --git > a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableParsing.h > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableParsing.h > new file mode 100644 > index 0000000000..b0d7f76bd8 > --- /dev/null > +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableParsing.h > @@ -0,0 +1,306 @@ > +/** @file > + Functions in this module are associated with variable parsing operatio= ns > and > + are intended to be usable across variable driver source files. > + > +Copyright (c) 2019, Intel Corporation. All rights reserved.
> +SPDX-License-Identifier: BSD-2-Clause-Patent > + > +**/ > + > +#ifndef _VARIABLE_PARSING_H_ > +#define _VARIABLE_PARSING_H_ > + > +#include > +#include "Variable.h" > + > +/** > + > + This code checks if variable header is valid or not. > + > + @param[in] Variable Pointer to the Variable Header. > + @param[in] VariableStoreEnd Pointer to the Variable Store End. > + > + @retval TRUE Variable header is valid. > + @retval FALSE Variable header is not valid. > + > +**/ > +BOOLEAN > +IsValidVariableHeader ( > + IN VARIABLE_HEADER *Variable, > + IN VARIABLE_HEADER *VariableStoreEnd > + ); > + > +/** > + > + This code gets the current status of Variable Store. > + > + @param[in] VarStoreHeader Pointer to the Variable Store Header. > + > + @retval EfiRaw Variable store status is raw. > + @retval EfiValid Variable store status is valid. > + @retval EfiInvalid Variable store status is invalid. > + > +**/ > +VARIABLE_STORE_STATUS > +GetVariableStoreStatus ( > + IN VARIABLE_STORE_HEADER *VarStoreHeader > + ); > + > +/** > + This code gets the size of variable header. > + > + @return Size of variable header in bytes in type UINTN. > + > +**/ > +UINTN > +GetVariableHeaderSize ( > + VOID > + ); > + > +/** > + > + This code gets the size of name of variable. > + > + @param Variable Pointer to the Variable Header. > + > + @return UINTN Size of variable in bytes. > + > +**/ > +UINTN > +NameSizeOfVariable ( > + IN VARIABLE_HEADER *Variable > + ); > + > +/** > + This code sets the size of name of variable. > + > + @param[in] Variable Pointer to the Variable Header. > + @param[in] NameSize Name size to set. > + > +**/ > +VOID > +SetNameSizeOfVariable ( > + IN VARIABLE_HEADER *Variable, > + IN UINTN NameSize > + ); > + > +/** > + > + This code gets the size of variable data. > + > + @param Variable Pointer to the Variable Header. > + > + @return Size of variable in bytes. > + > +**/ > +UINTN > +DataSizeOfVariable ( > + IN VARIABLE_HEADER *Variable > + ); > + > +/** > + This code sets the size of variable data. > + > + @param[in] Variable Pointer to the Variable Header. > + @param[in] DataSize Data size to set. > + > +**/ > +VOID > +SetDataSizeOfVariable ( > + IN VARIABLE_HEADER *Variable, > + IN UINTN DataSize > + ); > + > +/** > + > + This code gets the pointer to the variable name. > + > + @param Variable Pointer to the Variable Header. > + > + @return Pointer to Variable Name which is Unicode encoding. > + > +**/ > +CHAR16 * > +GetVariableNamePtr ( > + IN VARIABLE_HEADER *Variable > + ); > + > +/** > + This code gets the pointer to the variable guid. > + > + @param Variable Pointer to the Variable Header. > + > + @return A EFI_GUID* pointer to Vendor Guid. > + > +**/ > +EFI_GUID * > +GetVendorGuidPtr ( > + IN VARIABLE_HEADER *Variable > + ); > + > +/** > + > + This code gets the pointer to the variable data. > + > + @param Variable Pointer to the Variable Header. > + > + @return Pointer to Variable Data. > + > +**/ > +UINT8 * > +GetVariableDataPtr ( > + IN VARIABLE_HEADER *Variable > + ); > + > +/** > + This code gets the variable data offset related to variable header. > + > + @param Variable Pointer to the Variable Header. > + > + @return Variable Data offset. > + > +**/ > +UINTN > +GetVariableDataOffset ( > + IN VARIABLE_HEADER *Variable > + ); > + > +/** > + > + This code gets the pointer to the next variable header. > + > + @param Variable Pointer to the Variable Header. > + > + @return Pointer to next variable header. > + > +**/ > +VARIABLE_HEADER * > +GetNextVariablePtr ( > + IN VARIABLE_HEADER *Variable > + ); > + > +/** > + > + Gets the pointer to the first variable header in given variable store = area. > + > + @param[in] VarStoreHeader Pointer to the Variable Store Header. > + > + @return Pointer to the first variable header. > + > +**/ > +VARIABLE_HEADER * > +GetStartPointer ( > + IN VARIABLE_STORE_HEADER *VarStoreHeader > + ); > + > +/** > + > + Gets the pointer to the end of the variable storage area. > + > + This function gets pointer to the end of the variable storage > + area, according to the input variable store header. > + > + @param[in] VarStoreHeader Pointer to the Variable Store Header. > + > + @return Pointer to the end of the variable storage area. > + > +**/ > +VARIABLE_HEADER * > +GetEndPointer ( > + IN VARIABLE_STORE_HEADER *VarStoreHeader > + ); > + > +/** > + Compare two EFI_TIME data. > + > + > + @param[in] FirstTime A pointer to the first EFI_TIME data. > + @param[in] SecondTime A pointer to the second EFI_TIME data. > + > + @retval TRUE The FirstTime is not later than the SecondT= ime. > + @retval FALSE The FirstTime is later than the SecondTime. > + > +**/ > +BOOLEAN > +VariableCompareTimeStampInternal ( > + IN EFI_TIME *FirstTime, > + IN EFI_TIME *SecondTime > + ); > + > +/** > + Find the variable in the specified variable store. > + > + @param[in] VariableName Name of the variable to be found > + @param[in] VendorGuid Vendor GUID to be found. > + @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCES= S > attribute > + check at runtime when searching v= ariable. > + @param[in, out] PtrTrack Variable Track Pointer structure = that > contains Variable Information. > + > + @retval EFI_SUCCESS Variable found successfully > + @retval EFI_NOT_FOUND Variable not found > +**/ > +EFI_STATUS > +FindVariableEx ( > + IN CHAR16 *VariableName, > + IN EFI_GUID *VendorGuid, > + IN BOOLEAN IgnoreRtCheck, > + IN OUT VARIABLE_POINTER_TRACK *PtrTrack > + ); > + > +/** > + This code Finds the Next available variable. > + > + Caution: This function may receive untrusted input. > + This function may be invoked in SMM mode. This function will do basic > validation, before parse the data. > + > + @param[in] VariableName Pointer to variable name. > + @param[in] VendorGuid Variable Vendor Guid. > + @param[out] VariablePtr Pointer to variable header address. > + > + @retval EFI_SUCCESS The function completed successfully. > + @retval EFI_NOT_FOUND The next variable was not found. > + @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, > while VendorGuid is NULL. > + @retval EFI_INVALID_PARAMETER The input values of VariableName and > VendorGuid are not a name and > + GUID of an existing variable. > + > +**/ > +EFI_STATUS > +EFIAPI > +VariableServiceGetNextVariableInternal ( > + IN CHAR16 *VariableName, > + IN EFI_GUID *VendorGuid, > + OUT VARIABLE_HEADER **VariablePtr > + ); > + > +/** > + Routine used to track statistical information about variable usage. > + The data is stored in the EFI system table so it can be accessed later= . > + VariableInfo.efi can dump out the table. Only Boot Services variable > + accesses are tracked by this code. The PcdVariableCollectStatistics > + build flag controls if this feature is enabled. > + > + A read that hits in the cache will have Read and Cache true for > + the transaction. Data is allocated by this routine, but never > + freed. > + > + @param[in] VariableName Name of the Variable to track. > + @param[in] VendorGuid Guid of the Variable to track. > + @param[in] Volatile TRUE if volatile FALSE if non-volatile. > + @param[in] Read TRUE if GetVariable() was called. > + @param[in] Write TRUE if SetVariable() was called. > + @param[in] Delete TRUE if deleted via SetVariable(). > + @param[in] Cache TRUE for a cache hit. > + > +**/ > +VOID > +UpdateVariableInfo ( > + IN CHAR16 *VariableName, > + IN EFI_GUID *VendorGuid, > + IN BOOLEAN Volatile, > + IN BOOLEAN Read, > + IN BOOLEAN Write, > + IN BOOLEAN Delete, > + IN BOOLEAN Cache > + ); > + > +#endif > diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c > b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c > index f32c9c2808..76536308e6 100644 > --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c > +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c > @@ -23,6 +23,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent > **/ >=20 > #include "Variable.h" > +#include "VariableParsing.h" >=20 > VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal; >=20 > @@ -92,131 +93,6 @@ AUTH_VAR_LIB_CONTEXT_IN mAuthContextIn =3D { >=20 > AUTH_VAR_LIB_CONTEXT_OUT mAuthContextOut; >=20 > -/** > - Routine used to track statistical information about variable usage. > - The data is stored in the EFI system table so it can be accessed later= . > - VariableInfo.efi can dump out the table. Only Boot Services variable > - accesses are tracked by this code. The PcdVariableCollectStatistics > - build flag controls if this feature is enabled. > - > - A read that hits in the cache will have Read and Cache true for > - the transaction. Data is allocated by this routine, but never > - freed. > - > - @param[in] VariableName Name of the Variable to track. > - @param[in] VendorGuid Guid of the Variable to track. > - @param[in] Volatile TRUE if volatile FALSE if non-volatile. > - @param[in] Read TRUE if GetVariable() was called. > - @param[in] Write TRUE if SetVariable() was called. > - @param[in] Delete TRUE if deleted via SetVariable(). > - @param[in] Cache TRUE for a cache hit. > - > -**/ > -VOID > -UpdateVariableInfo ( > - IN CHAR16 *VariableName, > - IN EFI_GUID *VendorGuid, > - IN BOOLEAN Volatile, > - IN BOOLEAN Read, > - IN BOOLEAN Write, > - IN BOOLEAN Delete, > - IN BOOLEAN Cache > - ) > -{ > - VARIABLE_INFO_ENTRY *Entry; > - > - if (FeaturePcdGet (PcdVariableCollectStatistics)) { > - > - if (AtRuntime ()) { > - // Don't collect statistics at runtime. > - return; > - } > - > - if (gVariableInfo =3D=3D NULL) { > - // > - // On the first call allocate a entry and place a pointer to it in > - // the EFI System Table. > - // > - gVariableInfo =3D AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY)); > - ASSERT (gVariableInfo !=3D NULL); > - > - CopyGuid (&gVariableInfo->VendorGuid, VendorGuid); > - gVariableInfo->Name =3D AllocateZeroPool (StrSize (VariableName)); > - ASSERT (gVariableInfo->Name !=3D NULL); > - StrCpyS (gVariableInfo->Name, StrSize(VariableName)/sizeof(CHAR16)= , > VariableName); > - gVariableInfo->Volatile =3D Volatile; > - } > - > - > - for (Entry =3D gVariableInfo; Entry !=3D NULL; Entry =3D Entry->Next= ) { > - if (CompareGuid (VendorGuid, &Entry->VendorGuid)) { > - if (StrCmp (VariableName, Entry->Name) =3D=3D 0) { > - if (Read) { > - Entry->ReadCount++; > - } > - if (Write) { > - Entry->WriteCount++; > - } > - if (Delete) { > - Entry->DeleteCount++; > - } > - if (Cache) { > - Entry->CacheCount++; > - } > - > - return; > - } > - } > - > - if (Entry->Next =3D=3D NULL) { > - // > - // If the entry is not in the table add it. > - // Next iteration of the loop will fill in the data. > - // > - Entry->Next =3D AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY)); > - ASSERT (Entry->Next !=3D NULL); > - > - CopyGuid (&Entry->Next->VendorGuid, VendorGuid); > - Entry->Next->Name =3D AllocateZeroPool (StrSize (VariableName)); > - ASSERT (Entry->Next->Name !=3D NULL); > - StrCpyS (Entry->Next->Name, StrSize(VariableName)/sizeof(CHAR16)= , > VariableName); > - Entry->Next->Volatile =3D Volatile; > - } > - > - } > - } > -} > - > - > -/** > - > - This code checks if variable header is valid or not. > - > - @param Variable Pointer to the Variable Header. > - @param VariableStoreEnd Pointer to the Variable Store End. > - > - @retval TRUE Variable header is valid. > - @retval FALSE Variable header is not valid. > - > -**/ > -BOOLEAN > -IsValidVariableHeader ( > - IN VARIABLE_HEADER *Variable, > - IN VARIABLE_HEADER *VariableStoreEnd > - ) > -{ > - if ((Variable =3D=3D NULL) || (Variable >=3D VariableStoreEnd) || (Var= iable- > >StartId !=3D VARIABLE_DATA)) { > - // > - // Variable is NULL or has reached the end of variable store, > - // or the StartId is not correct. > - // > - return FALSE; > - } > - > - return TRUE; > -} > - > - > /** >=20 > This function writes data to the FWH at the correct LBA even if the LB= As > @@ -376,345 +252,6 @@ UpdateVariableStore ( > return EFI_SUCCESS; > } >=20 > - > -/** > - > - This code gets the current status of Variable Store. > - > - @param VarStoreHeader Pointer to the Variable Store Header. > - > - @retval EfiRaw Variable store status is raw. > - @retval EfiValid Variable store status is valid. > - @retval EfiInvalid Variable store status is invalid. > - > -**/ > -VARIABLE_STORE_STATUS > -GetVariableStoreStatus ( > - IN VARIABLE_STORE_HEADER *VarStoreHeader > - ) > -{ > - if ((CompareGuid (&VarStoreHeader->Signature, > &gEfiAuthenticatedVariableGuid) || > - CompareGuid (&VarStoreHeader->Signature, &gEfiVariableGuid)) && > - VarStoreHeader->Format =3D=3D VARIABLE_STORE_FORMATTED && > - VarStoreHeader->State =3D=3D VARIABLE_STORE_HEALTHY > - ) { > - > - return EfiValid; > - } else if (((UINT32 *)(&VarStoreHeader->Signature))[0] =3D=3D 0xffffff= ff && > - ((UINT32 *)(&VarStoreHeader->Signature))[1] =3D=3D 0xffffff= ff && > - ((UINT32 *)(&VarStoreHeader->Signature))[2] =3D=3D 0xffffff= ff && > - ((UINT32 *)(&VarStoreHeader->Signature))[3] =3D=3D 0xffffff= ff && > - VarStoreHeader->Size =3D=3D 0xffffffff && > - VarStoreHeader->Format =3D=3D 0xff && > - VarStoreHeader->State =3D=3D 0xff > - ) { > - > - return EfiRaw; > - } else { > - return EfiInvalid; > - } > -} > - > -/** > - This code gets the size of variable header. > - > - @return Size of variable header in bytes in type UINTN. > - > -**/ > -UINTN > -GetVariableHeaderSize ( > - VOID > - ) > -{ > - UINTN Value; > - > - if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > - Value =3D sizeof (AUTHENTICATED_VARIABLE_HEADER); > - } else { > - Value =3D sizeof (VARIABLE_HEADER); > - } > - > - return Value; > -} > - > -/** > - > - This code gets the size of name of variable. > - > - @param Variable Pointer to the Variable Header. > - > - @return UINTN Size of variable in bytes. > - > -**/ > -UINTN > -NameSizeOfVariable ( > - IN VARIABLE_HEADER *Variable > - ) > -{ > - AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > - > - AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > - if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > - if (AuthVariable->State =3D=3D (UINT8) (-1) || > - AuthVariable->DataSize =3D=3D (UINT32) (-1) || > - AuthVariable->NameSize =3D=3D (UINT32) (-1) || > - AuthVariable->Attributes =3D=3D (UINT32) (-1)) { > - return 0; > - } > - return (UINTN) AuthVariable->NameSize; > - } else { > - if (Variable->State =3D=3D (UINT8) (-1) || > - Variable->DataSize =3D=3D (UINT32) (-1) || > - Variable->NameSize =3D=3D (UINT32) (-1) || > - Variable->Attributes =3D=3D (UINT32) (-1)) { > - return 0; > - } > - return (UINTN) Variable->NameSize; > - } > -} > - > -/** > - This code sets the size of name of variable. > - > - @param[in] Variable Pointer to the Variable Header. > - @param[in] NameSize Name size to set. > - > -**/ > -VOID > -SetNameSizeOfVariable ( > - IN VARIABLE_HEADER *Variable, > - IN UINTN NameSize > - ) > -{ > - AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > - > - AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > - if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > - AuthVariable->NameSize =3D (UINT32) NameSize; > - } else { > - Variable->NameSize =3D (UINT32) NameSize; > - } > -} > - > -/** > - > - This code gets the size of variable data. > - > - @param Variable Pointer to the Variable Header. > - > - @return Size of variable in bytes. > - > -**/ > -UINTN > -DataSizeOfVariable ( > - IN VARIABLE_HEADER *Variable > - ) > -{ > - AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > - > - AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > - if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > - if (AuthVariable->State =3D=3D (UINT8) (-1) || > - AuthVariable->DataSize =3D=3D (UINT32) (-1) || > - AuthVariable->NameSize =3D=3D (UINT32) (-1) || > - AuthVariable->Attributes =3D=3D (UINT32) (-1)) { > - return 0; > - } > - return (UINTN) AuthVariable->DataSize; > - } else { > - if (Variable->State =3D=3D (UINT8) (-1) || > - Variable->DataSize =3D=3D (UINT32) (-1) || > - Variable->NameSize =3D=3D (UINT32) (-1) || > - Variable->Attributes =3D=3D (UINT32) (-1)) { > - return 0; > - } > - return (UINTN) Variable->DataSize; > - } > -} > - > -/** > - This code sets the size of variable data. > - > - @param[in] Variable Pointer to the Variable Header. > - @param[in] DataSize Data size to set. > - > -**/ > -VOID > -SetDataSizeOfVariable ( > - IN VARIABLE_HEADER *Variable, > - IN UINTN DataSize > - ) > -{ > - AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > - > - AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > - if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > - AuthVariable->DataSize =3D (UINT32) DataSize; > - } else { > - Variable->DataSize =3D (UINT32) DataSize; > - } > -} > - > -/** > - > - This code gets the pointer to the variable name. > - > - @param Variable Pointer to the Variable Header. > - > - @return Pointer to Variable Name which is Unicode encoding. > - > -**/ > -CHAR16 * > -GetVariableNamePtr ( > - IN VARIABLE_HEADER *Variable > - ) > -{ > - return (CHAR16 *) ((UINTN) Variable + GetVariableHeaderSize ()); > -} > - > -/** > - This code gets the pointer to the variable guid. > - > - @param Variable Pointer to the Variable Header. > - > - @return A EFI_GUID* pointer to Vendor Guid. > - > -**/ > -EFI_GUID * > -GetVendorGuidPtr ( > - IN VARIABLE_HEADER *Variable > - ) > -{ > - AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > - > - AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > - if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > - return &AuthVariable->VendorGuid; > - } else { > - return &Variable->VendorGuid; > - } > -} > - > -/** > - > - This code gets the pointer to the variable data. > - > - @param Variable Pointer to the Variable Header. > - > - @return Pointer to Variable Data. > - > -**/ > -UINT8 * > -GetVariableDataPtr ( > - IN VARIABLE_HEADER *Variable > - ) > -{ > - UINTN Value; > - > - // > - // Be careful about pad size for alignment. > - // > - Value =3D (UINTN) GetVariableNamePtr (Variable); > - Value +=3D NameSizeOfVariable (Variable); > - Value +=3D GET_PAD_SIZE (NameSizeOfVariable (Variable)); > - > - return (UINT8 *) Value; > -} > - > -/** > - This code gets the variable data offset related to variable header. > - > - @param Variable Pointer to the Variable Header. > - > - @return Variable Data offset. > - > -**/ > -UINTN > -GetVariableDataOffset ( > - IN VARIABLE_HEADER *Variable > - ) > -{ > - UINTN Value; > - > - // > - // Be careful about pad size for alignment > - // > - Value =3D GetVariableHeaderSize (); > - Value +=3D NameSizeOfVariable (Variable); > - Value +=3D GET_PAD_SIZE (NameSizeOfVariable (Variable)); > - > - return Value; > -} > - > -/** > - > - This code gets the pointer to the next variable header. > - > - @param Variable Pointer to the Variable Header. > - > - @return Pointer to next variable header. > - > -**/ > -VARIABLE_HEADER * > -GetNextVariablePtr ( > - IN VARIABLE_HEADER *Variable > - ) > -{ > - UINTN Value; > - > - Value =3D (UINTN) GetVariableDataPtr (Variable); > - Value +=3D DataSizeOfVariable (Variable); > - Value +=3D GET_PAD_SIZE (DataSizeOfVariable (Variable)); > - > - // > - // Be careful about pad size for alignment. > - // > - return (VARIABLE_HEADER *) HEADER_ALIGN (Value); > -} > - > -/** > - > - Gets the pointer to the first variable header in given variable store = area. > - > - @param VarStoreHeader Pointer to the Variable Store Header. > - > - @return Pointer to the first variable header. > - > -**/ > -VARIABLE_HEADER * > -GetStartPointer ( > - IN VARIABLE_STORE_HEADER *VarStoreHeader > - ) > -{ > - // > - // The start of variable store. > - // > - return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1); > -} > - > -/** > - > - Gets the pointer to the end of the variable storage area. > - > - This function gets pointer to the end of the variable storage > - area, according to the input variable store header. > - > - @param VarStoreHeader Pointer to the Variable Store Header. > - > - @return Pointer to the end of the variable storage area. > - > -**/ > -VARIABLE_HEADER * > -GetEndPointer ( > - IN VARIABLE_STORE_HEADER *VarStoreHeader > - ) > -{ > - // > - // The end of variable store > - // > - return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + > VarStoreHeader->Size); > -} > - > /** > Record variable error flag. >=20 > @@ -1228,75 +765,6 @@ Done: > return Status; > } >=20 > -/** > - Find the variable in the specified variable store. > - > - @param[in] VariableName Name of the variable to be found > - @param[in] VendorGuid Vendor GUID to be found. > - @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCES= S > attribute > - check at runtime when searching v= ariable. > - @param[in, out] PtrTrack Variable Track Pointer structure = that > contains Variable Information. > - > - @retval EFI_SUCCESS Variable found successfully > - @retval EFI_NOT_FOUND Variable not found > -**/ > -EFI_STATUS > -FindVariableEx ( > - IN CHAR16 *VariableName, > - IN EFI_GUID *VendorGuid, > - IN BOOLEAN IgnoreRtCheck, > - IN OUT VARIABLE_POINTER_TRACK *PtrTrack > - ) > -{ > - VARIABLE_HEADER *InDeletedVariable; > - VOID *Point; > - > - PtrTrack->InDeletedTransitionPtr =3D NULL; > - > - // > - // Find the variable by walk through HOB, volatile and non-volatile va= riable > store. > - // > - InDeletedVariable =3D NULL; > - > - for ( PtrTrack->CurrPtr =3D PtrTrack->StartPtr > - ; IsValidVariableHeader (PtrTrack->CurrPtr, PtrTrack->EndPtr) > - ; PtrTrack->CurrPtr =3D GetNextVariablePtr (PtrTrack->CurrPtr) > - ) { > - if (PtrTrack->CurrPtr->State =3D=3D VAR_ADDED || > - PtrTrack->CurrPtr->State =3D=3D (VAR_IN_DELETED_TRANSITION & > VAR_ADDED) > - ) { > - if (IgnoreRtCheck || !AtRuntime () || ((PtrTrack->CurrPtr->Attribu= tes & > EFI_VARIABLE_RUNTIME_ACCESS) !=3D 0)) { > - if (VariableName[0] =3D=3D 0) { > - if (PtrTrack->CurrPtr->State =3D=3D (VAR_IN_DELETED_TRANSITION= & > VAR_ADDED)) { > - InDeletedVariable =3D PtrTrack->CurrPtr; > - } else { > - PtrTrack->InDeletedTransitionPtr =3D InDeletedVariable; > - return EFI_SUCCESS; > - } > - } else { > - if (CompareGuid (VendorGuid, GetVendorGuidPtr (PtrTrack->CurrP= tr))) > { > - Point =3D (VOID *) GetVariableNamePtr (PtrTrack->CurrPtr); > - > - ASSERT (NameSizeOfVariable (PtrTrack->CurrPtr) !=3D 0); > - if (CompareMem (VariableName, Point, NameSizeOfVariable > (PtrTrack->CurrPtr)) =3D=3D 0) { > - if (PtrTrack->CurrPtr->State =3D=3D (VAR_IN_DELETED_TRANSI= TION & > VAR_ADDED)) { > - InDeletedVariable =3D PtrTrack->CurrPtr; > - } else { > - PtrTrack->InDeletedTransitionPtr =3D InDeletedVariable; > - return EFI_SUCCESS; > - } > - } > - } > - } > - } > - } > - } > - > - PtrTrack->CurrPtr =3D InDeletedVariable; > - return (PtrTrack->CurrPtr =3D=3D NULL) ? EFI_NOT_FOUND : EFI_SUCCESS; > -} > - > - > /** > Finds variable in storage blocks of volatile and non-volatile storage = areas. >=20 > @@ -2078,38 +1546,6 @@ AutoUpdateLangVariable ( > } > } >=20 > -/** > - Compare two EFI_TIME data. > - > - > - @param FirstTime A pointer to the first EFI_TIME data. > - @param SecondTime A pointer to the second EFI_TIME data. > - > - @retval TRUE The FirstTime is not later than the SecondT= ime. > - @retval FALSE The FirstTime is later than the SecondTime. > - > -**/ > -BOOLEAN > -VariableCompareTimeStampInternal ( > - IN EFI_TIME *FirstTime, > - IN EFI_TIME *SecondTime > - ) > -{ > - if (FirstTime->Year !=3D SecondTime->Year) { > - return (BOOLEAN) (FirstTime->Year < SecondTime->Year); > - } else if (FirstTime->Month !=3D SecondTime->Month) { > - return (BOOLEAN) (FirstTime->Month < SecondTime->Month); > - } else if (FirstTime->Day !=3D SecondTime->Day) { > - return (BOOLEAN) (FirstTime->Day < SecondTime->Day); > - } else if (FirstTime->Hour !=3D SecondTime->Hour) { > - return (BOOLEAN) (FirstTime->Hour < SecondTime->Hour); > - } else if (FirstTime->Minute !=3D SecondTime->Minute) { > - return (BOOLEAN) (FirstTime->Minute < SecondTime->Minute); > - } > - > - return (BOOLEAN) (FirstTime->Second <=3D SecondTime->Second); > -} > - > /** > Update the variable region with Variable information. If > EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set, > index of associated public key is needed. > @@ -2885,166 +2321,6 @@ Done: > return Status; > } >=20 > -/** > - This code Finds the Next available variable. > - > - Caution: This function may receive untrusted input. > - This function may be invoked in SMM mode. This function will do basic > validation, before parse the data. > - > - @param[in] VariableName Pointer to variable name. > - @param[in] VendorGuid Variable Vendor Guid. > - @param[out] VariablePtr Pointer to variable header address. > - > - @retval EFI_SUCCESS The function completed successfully. > - @retval EFI_NOT_FOUND The next variable was not found. > - @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, > while VendorGuid is NULL. > - @retval EFI_INVALID_PARAMETER The input values of VariableName and > VendorGuid are not a name and > - GUID of an existing variable. > - > -**/ > -EFI_STATUS > -EFIAPI > -VariableServiceGetNextVariableInternal ( > - IN CHAR16 *VariableName, > - IN EFI_GUID *VendorGuid, > - OUT VARIABLE_HEADER **VariablePtr > - ) > -{ > - VARIABLE_STORE_TYPE Type; > - VARIABLE_POINTER_TRACK Variable; > - VARIABLE_POINTER_TRACK VariableInHob; > - VARIABLE_POINTER_TRACK VariablePtrTrack; > - EFI_STATUS Status; > - VARIABLE_STORE_HEADER *VariableStoreHeader[VariableStoreTypeMax]; > - > - Status =3D FindVariable (VariableName, VendorGuid, &Variable, > &mVariableModuleGlobal->VariableGlobal, FALSE); > - if (Variable.CurrPtr =3D=3D NULL || EFI_ERROR (Status)) { > - // > - // For VariableName is an empty string, FindVariable() will try to f= ind and > return > - // the first qualified variable, and if FindVariable() returns error > (EFI_NOT_FOUND) > - // as no any variable is found, still go to return the error > (EFI_NOT_FOUND). > - // > - if (VariableName[0] !=3D 0) { > - // > - // For VariableName is not an empty string, and FindVariable() ret= urns > error as > - // VariableName and VendorGuid are not a name and GUID of an exist= ing > variable, > - // there is no way to get next variable, follow spec to return > EFI_INVALID_PARAMETER. > - // > - Status =3D EFI_INVALID_PARAMETER; > - } > - goto Done; > - } > - > - if (VariableName[0] !=3D 0) { > - // > - // If variable name is not NULL, get next variable. > - // > - Variable.CurrPtr =3D GetNextVariablePtr (Variable.CurrPtr); > - } > - > - // > - // 0: Volatile, 1: HOB, 2: Non-Volatile. > - // The index and attributes mapping must be kept in this order as > FindVariable > - // makes use of this mapping to implement search algorithm. > - // > - VariableStoreHeader[VariableStoreTypeVolatile] =3D > (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal- > >VariableGlobal.VolatileVariableBase; > - VariableStoreHeader[VariableStoreTypeHob] =3D > (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal- > >VariableGlobal.HobVariableBase; > - VariableStoreHeader[VariableStoreTypeNv] =3D mNvVariableCache; > - > - while (TRUE) { > - // > - // Switch from Volatile to HOB, to Non-Volatile. > - // > - while (!IsValidVariableHeader (Variable.CurrPtr, Variable.EndPtr)) { > - // > - // Find current storage index > - // > - for (Type =3D (VARIABLE_STORE_TYPE) 0; Type < VariableStoreTypeMax= ; > Type++) { > - if ((VariableStoreHeader[Type] !=3D NULL) && (Variable.StartPtr = =3D=3D > GetStartPointer (VariableStoreHeader[Type]))) { > - break; > - } > - } > - ASSERT (Type < VariableStoreTypeMax); > - // > - // Switch to next storage > - // > - for (Type++; Type < VariableStoreTypeMax; Type++) { > - if (VariableStoreHeader[Type] !=3D NULL) { > - break; > - } > - } > - // > - // Capture the case that > - // 1. current storage is the last one, or > - // 2. no further storage > - // > - if (Type =3D=3D VariableStoreTypeMax) { > - Status =3D EFI_NOT_FOUND; > - goto Done; > - } > - Variable.StartPtr =3D GetStartPointer (VariableStoreHeader[Type]); > - Variable.EndPtr =3D GetEndPointer (VariableStoreHeader[Type]); > - Variable.CurrPtr =3D Variable.StartPtr; > - } > - > - // > - // Variable is found > - // > - if (Variable.CurrPtr->State =3D=3D VAR_ADDED || Variable.CurrPtr->St= ate =3D=3D > (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) { > - if (!AtRuntime () || ((Variable.CurrPtr->Attributes & > EFI_VARIABLE_RUNTIME_ACCESS) !=3D 0)) { > - if (Variable.CurrPtr->State =3D=3D (VAR_IN_DELETED_TRANSITION & > VAR_ADDED)) { > - // > - // If it is a IN_DELETED_TRANSITION variable, > - // and there is also a same ADDED one at the same time, > - // don't return it. > - // > - VariablePtrTrack.StartPtr =3D Variable.StartPtr; > - VariablePtrTrack.EndPtr =3D Variable.EndPtr; > - Status =3D FindVariableEx ( > - GetVariableNamePtr (Variable.CurrPtr), > - GetVendorGuidPtr (Variable.CurrPtr), > - FALSE, > - &VariablePtrTrack > - ); > - if (!EFI_ERROR (Status) && VariablePtrTrack.CurrPtr->State =3D= =3D > VAR_ADDED) { > - Variable.CurrPtr =3D GetNextVariablePtr (Variable.CurrPtr); > - continue; > - } > - } > - > - // > - // Don't return NV variable when HOB overrides it > - // > - if ((VariableStoreHeader[VariableStoreTypeHob] !=3D NULL) && > (VariableStoreHeader[VariableStoreTypeNv] !=3D NULL) && > - (Variable.StartPtr =3D=3D GetStartPointer > (VariableStoreHeader[VariableStoreTypeNv])) > - ) { > - VariableInHob.StartPtr =3D GetStartPointer > (VariableStoreHeader[VariableStoreTypeHob]); > - VariableInHob.EndPtr =3D GetEndPointer > (VariableStoreHeader[VariableStoreTypeHob]); > - Status =3D FindVariableEx ( > - GetVariableNamePtr (Variable.CurrPtr), > - GetVendorGuidPtr (Variable.CurrPtr), > - FALSE, > - &VariableInHob > - ); > - if (!EFI_ERROR (Status)) { > - Variable.CurrPtr =3D GetNextVariablePtr (Variable.CurrPtr); > - continue; > - } > - } > - > - *VariablePtr =3D Variable.CurrPtr; > - Status =3D EFI_SUCCESS; > - goto Done; > - } > - } > - > - Variable.CurrPtr =3D GetNextVariablePtr (Variable.CurrPtr); > - } > - > -Done: > - return Status; > -} > - > /** >=20 > This code Finds the Next available variable. > diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableExLib.c > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableExLib.c > index cb6fcebe2d..dc78f68fa9 100644 > --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableExLib.c > +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableExLib.c > @@ -1,12 +1,13 @@ > /** @file > Provides variable driver extended services. >=20 > -Copyright (c) 2015, Intel Corporation. All rights reserved.
> +Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.
> SPDX-License-Identifier: BSD-2-Clause-Patent >=20 > **/ >=20 > #include "Variable.h" > +#include "VariableParsing.h" >=20 > /** > Finds variable in storage blocks of volatile and non-volatile storage = areas. > diff --git > a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableParsing.c > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableParsing.c > new file mode 100644 > index 0000000000..5698a1a5e4 > --- /dev/null > +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableParsing.c > @@ -0,0 +1,731 @@ > +/** @file > + Functions in this module are associated with variable parsing operatio= ns > and > + are intended to be usable across variable driver source files. > + > +Copyright (c) 2019, Intel Corporation. All rights reserved.
> +SPDX-License-Identifier: BSD-2-Clause-Patent > + > +**/ > + > +#include "VariableParsing.h" > + > +/** > + > + This code checks if variable header is valid or not. > + > + @param[in] Variable Pointer to the Variable Header. > + @param[in] VariableStoreEnd Pointer to the Variable Store End. > + > + @retval TRUE Variable header is valid. > + @retval FALSE Variable header is not valid. > + > +**/ > +BOOLEAN > +IsValidVariableHeader ( > + IN VARIABLE_HEADER *Variable, > + IN VARIABLE_HEADER *VariableStoreEnd > + ) > +{ > + if ((Variable =3D=3D NULL) || (Variable >=3D VariableStoreEnd) || (Var= iable- > >StartId !=3D VARIABLE_DATA)) { > + // > + // Variable is NULL or has reached the end of variable store, > + // or the StartId is not correct. > + // > + return FALSE; > + } > + > + return TRUE; > +} > + > +/** > + > + This code gets the current status of Variable Store. > + > + @param[in] VarStoreHeader Pointer to the Variable Store Header. > + > + @retval EfiRaw Variable store status is raw. > + @retval EfiValid Variable store status is valid. > + @retval EfiInvalid Variable store status is invalid. > + > +**/ > +VARIABLE_STORE_STATUS > +GetVariableStoreStatus ( > + IN VARIABLE_STORE_HEADER *VarStoreHeader > + ) > +{ > + if ((CompareGuid (&VarStoreHeader->Signature, > &gEfiAuthenticatedVariableGuid) || > + CompareGuid (&VarStoreHeader->Signature, &gEfiVariableGuid)) && > + VarStoreHeader->Format =3D=3D VARIABLE_STORE_FORMATTED && > + VarStoreHeader->State =3D=3D VARIABLE_STORE_HEALTHY > + ) { > + > + return EfiValid; > + } else if (((UINT32 *)(&VarStoreHeader->Signature))[0] =3D=3D 0xffffff= ff && > + ((UINT32 *)(&VarStoreHeader->Signature))[1] =3D=3D 0xffffff= ff && > + ((UINT32 *)(&VarStoreHeader->Signature))[2] =3D=3D 0xffffff= ff && > + ((UINT32 *)(&VarStoreHeader->Signature))[3] =3D=3D 0xffffff= ff && > + VarStoreHeader->Size =3D=3D 0xffffffff && > + VarStoreHeader->Format =3D=3D 0xff && > + VarStoreHeader->State =3D=3D 0xff > + ) { > + > + return EfiRaw; > + } else { > + return EfiInvalid; > + } > +} > + > +/** > + This code gets the size of variable header. > + > + @return Size of variable header in bytes in type UINTN. > + > +**/ > +UINTN > +GetVariableHeaderSize ( > + VOID > + ) > +{ > + UINTN Value; > + > + if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > + Value =3D sizeof (AUTHENTICATED_VARIABLE_HEADER); > + } else { > + Value =3D sizeof (VARIABLE_HEADER); > + } > + > + return Value; > +} > + > +/** > + > + This code gets the size of name of variable. > + > + @param Variable Pointer to the Variable Header. > + > + @return UINTN Size of variable in bytes. > + > +**/ > +UINTN > +NameSizeOfVariable ( > + IN VARIABLE_HEADER *Variable > + ) > +{ > + AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > + > + AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > + if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > + if (AuthVariable->State =3D=3D (UINT8) (-1) || > + AuthVariable->DataSize =3D=3D (UINT32) (-1) || > + AuthVariable->NameSize =3D=3D (UINT32) (-1) || > + AuthVariable->Attributes =3D=3D (UINT32) (-1)) { > + return 0; > + } > + return (UINTN) AuthVariable->NameSize; > + } else { > + if (Variable->State =3D=3D (UINT8) (-1) || > + Variable->DataSize =3D=3D (UINT32) (-1) || > + Variable->NameSize =3D=3D (UINT32) (-1) || > + Variable->Attributes =3D=3D (UINT32) (-1)) { > + return 0; > + } > + return (UINTN) Variable->NameSize; > + } > +} > + > +/** > + This code sets the size of name of variable. > + > + @param[in] Variable Pointer to the Variable Header. > + @param[in] NameSize Name size to set. > + > +**/ > +VOID > +SetNameSizeOfVariable ( > + IN VARIABLE_HEADER *Variable, > + IN UINTN NameSize > + ) > +{ > + AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > + > + AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > + if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > + AuthVariable->NameSize =3D (UINT32) NameSize; > + } else { > + Variable->NameSize =3D (UINT32) NameSize; > + } > +} > + > +/** > + > + This code gets the size of variable data. > + > + @param Variable Pointer to the Variable Header. > + > + @return Size of variable in bytes. > + > +**/ > +UINTN > +DataSizeOfVariable ( > + IN VARIABLE_HEADER *Variable > + ) > +{ > + AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > + > + AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > + if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > + if (AuthVariable->State =3D=3D (UINT8) (-1) || > + AuthVariable->DataSize =3D=3D (UINT32) (-1) || > + AuthVariable->NameSize =3D=3D (UINT32) (-1) || > + AuthVariable->Attributes =3D=3D (UINT32) (-1)) { > + return 0; > + } > + return (UINTN) AuthVariable->DataSize; > + } else { > + if (Variable->State =3D=3D (UINT8) (-1) || > + Variable->DataSize =3D=3D (UINT32) (-1) || > + Variable->NameSize =3D=3D (UINT32) (-1) || > + Variable->Attributes =3D=3D (UINT32) (-1)) { > + return 0; > + } > + return (UINTN) Variable->DataSize; > + } > +} > + > +/** > + This code sets the size of variable data. > + > + @param[in] Variable Pointer to the Variable Header. > + @param[in] DataSize Data size to set. > + > +**/ > +VOID > +SetDataSizeOfVariable ( > + IN VARIABLE_HEADER *Variable, > + IN UINTN DataSize > + ) > +{ > + AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > + > + AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > + if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > + AuthVariable->DataSize =3D (UINT32) DataSize; > + } else { > + Variable->DataSize =3D (UINT32) DataSize; > + } > +} > + > +/** > + > + This code gets the pointer to the variable name. > + > + @param Variable Pointer to the Variable Header. > + > + @return Pointer to Variable Name which is Unicode encoding. > + > +**/ > +CHAR16 * > +GetVariableNamePtr ( > + IN VARIABLE_HEADER *Variable > + ) > +{ > + return (CHAR16 *) ((UINTN) Variable + GetVariableHeaderSize ()); > +} > + > +/** > + This code gets the pointer to the variable guid. > + > + @param Variable Pointer to the Variable Header. > + > + @return A EFI_GUID* pointer to Vendor Guid. > + > +**/ > +EFI_GUID * > +GetVendorGuidPtr ( > + IN VARIABLE_HEADER *Variable > + ) > +{ > + AUTHENTICATED_VARIABLE_HEADER *AuthVariable; > + > + AuthVariable =3D (AUTHENTICATED_VARIABLE_HEADER *) Variable; > + if (mVariableModuleGlobal->VariableGlobal.AuthFormat) { > + return &AuthVariable->VendorGuid; > + } else { > + return &Variable->VendorGuid; > + } > +} > + > +/** > + > + This code gets the pointer to the variable data. > + > + @param Variable Pointer to the Variable Header. > + > + @return Pointer to Variable Data. > + > +**/ > +UINT8 * > +GetVariableDataPtr ( > + IN VARIABLE_HEADER *Variable > + ) > +{ > + UINTN Value; > + > + // > + // Be careful about pad size for alignment. > + // > + Value =3D (UINTN) GetVariableNamePtr (Variable); > + Value +=3D NameSizeOfVariable (Variable); > + Value +=3D GET_PAD_SIZE (NameSizeOfVariable (Variable)); > + > + return (UINT8 *) Value; > +} > + > +/** > + This code gets the variable data offset related to variable header. > + > + @param Variable Pointer to the Variable Header. > + > + @return Variable Data offset. > + > +**/ > +UINTN > +GetVariableDataOffset ( > + IN VARIABLE_HEADER *Variable > + ) > +{ > + UINTN Value; > + > + // > + // Be careful about pad size for alignment > + // > + Value =3D GetVariableHeaderSize (); > + Value +=3D NameSizeOfVariable (Variable); > + Value +=3D GET_PAD_SIZE (NameSizeOfVariable (Variable)); > + > + return Value; > +} > + > +/** > + > + This code gets the pointer to the next variable header. > + > + @param Variable Pointer to the Variable Header. > + > + @return Pointer to next variable header. > + > +**/ > +VARIABLE_HEADER * > +GetNextVariablePtr ( > + IN VARIABLE_HEADER *Variable > + ) > +{ > + UINTN Value; > + > + Value =3D (UINTN) GetVariableDataPtr (Variable); > + Value +=3D DataSizeOfVariable (Variable); > + Value +=3D GET_PAD_SIZE (DataSizeOfVariable (Variable)); > + > + // > + // Be careful about pad size for alignment. > + // > + return (VARIABLE_HEADER *) HEADER_ALIGN (Value); > +} > + > +/** > + > + Gets the pointer to the first variable header in given variable store = area. > + > + @param[in] VarStoreHeader Pointer to the Variable Store Header. > + > + @return Pointer to the first variable header. > + > +**/ > +VARIABLE_HEADER * > +GetStartPointer ( > + IN VARIABLE_STORE_HEADER *VarStoreHeader > + ) > +{ > + // > + // The start of variable store. > + // > + return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1); > +} > + > +/** > + > + Gets the pointer to the end of the variable storage area. > + > + This function gets pointer to the end of the variable storage > + area, according to the input variable store header. > + > + @param[in] VarStoreHeader Pointer to the Variable Store Header. > + > + @return Pointer to the end of the variable storage area. > + > +**/ > +VARIABLE_HEADER * > +GetEndPointer ( > + IN VARIABLE_STORE_HEADER *VarStoreHeader > + ) > +{ > + // > + // The end of variable store > + // > + return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + > VarStoreHeader->Size); > +} > + > +/** > + Compare two EFI_TIME data. > + > + > + @param[in] FirstTime A pointer to the first EFI_TIME data. > + @param[in] SecondTime A pointer to the second EFI_TIME data. > + > + @retval TRUE The FirstTime is not later than the SecondT= ime. > + @retval FALSE The FirstTime is later than the SecondTime. > + > +**/ > +BOOLEAN > +VariableCompareTimeStampInternal ( > + IN EFI_TIME *FirstTime, > + IN EFI_TIME *SecondTime > + ) > +{ > + if (FirstTime->Year !=3D SecondTime->Year) { > + return (BOOLEAN) (FirstTime->Year < SecondTime->Year); > + } else if (FirstTime->Month !=3D SecondTime->Month) { > + return (BOOLEAN) (FirstTime->Month < SecondTime->Month); > + } else if (FirstTime->Day !=3D SecondTime->Day) { > + return (BOOLEAN) (FirstTime->Day < SecondTime->Day); > + } else if (FirstTime->Hour !=3D SecondTime->Hour) { > + return (BOOLEAN) (FirstTime->Hour < SecondTime->Hour); > + } else if (FirstTime->Minute !=3D SecondTime->Minute) { > + return (BOOLEAN) (FirstTime->Minute < SecondTime->Minute); > + } > + > + return (BOOLEAN) (FirstTime->Second <=3D SecondTime->Second); > +} > + > +/** > + Find the variable in the specified variable store. > + > + @param[in] VariableName Name of the variable to be found > + @param[in] VendorGuid Vendor GUID to be found. > + @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCES= S > attribute > + check at runtime when searching v= ariable. > + @param[in, out] PtrTrack Variable Track Pointer structure = that > contains Variable Information. > + > + @retval EFI_SUCCESS Variable found successfully > + @retval EFI_NOT_FOUND Variable not found > +**/ > +EFI_STATUS > +FindVariableEx ( > + IN CHAR16 *VariableName, > + IN EFI_GUID *VendorGuid, > + IN BOOLEAN IgnoreRtCheck, > + IN OUT VARIABLE_POINTER_TRACK *PtrTrack > + ) > +{ > + VARIABLE_HEADER *InDeletedVariable; > + VOID *Point; > + > + PtrTrack->InDeletedTransitionPtr =3D NULL; > + > + // > + // Find the variable by walk through HOB, volatile and non-volatile va= riable > store. > + // > + InDeletedVariable =3D NULL; > + > + for ( PtrTrack->CurrPtr =3D PtrTrack->StartPtr > + ; IsValidVariableHeader (PtrTrack->CurrPtr, PtrTrack->EndPtr) > + ; PtrTrack->CurrPtr =3D GetNextVariablePtr (PtrTrack->CurrPtr) > + ) { > + if (PtrTrack->CurrPtr->State =3D=3D VAR_ADDED || > + PtrTrack->CurrPtr->State =3D=3D (VAR_IN_DELETED_TRANSITION & > VAR_ADDED) > + ) { > + if (IgnoreRtCheck || !AtRuntime () || ((PtrTrack->CurrPtr->Attribu= tes & > EFI_VARIABLE_RUNTIME_ACCESS) !=3D 0)) { > + if (VariableName[0] =3D=3D 0) { > + if (PtrTrack->CurrPtr->State =3D=3D (VAR_IN_DELETED_TRANSITION= & > VAR_ADDED)) { > + InDeletedVariable =3D PtrTrack->CurrPtr; > + } else { > + PtrTrack->InDeletedTransitionPtr =3D InDeletedVariable; > + return EFI_SUCCESS; > + } > + } else { > + if (CompareGuid (VendorGuid, GetVendorGuidPtr (PtrTrack->CurrP= tr))) > { > + Point =3D (VOID *) GetVariableNamePtr (PtrTrack->CurrPtr); > + > + ASSERT (NameSizeOfVariable (PtrTrack->CurrPtr) !=3D 0); > + if (CompareMem (VariableName, Point, NameSizeOfVariable > (PtrTrack->CurrPtr)) =3D=3D 0) { > + if (PtrTrack->CurrPtr->State =3D=3D (VAR_IN_DELETED_TRANSI= TION & > VAR_ADDED)) { > + InDeletedVariable =3D PtrTrack->CurrPtr; > + } else { > + PtrTrack->InDeletedTransitionPtr =3D InDeletedVariable; > + return EFI_SUCCESS; > + } > + } > + } > + } > + } > + } > + } > + > + PtrTrack->CurrPtr =3D InDeletedVariable; > + return (PtrTrack->CurrPtr =3D=3D NULL) ? EFI_NOT_FOUND : EFI_SUCCESS; > +} > + > +/** > + This code Finds the Next available variable. > + > + Caution: This function may receive untrusted input. > + This function may be invoked in SMM mode. This function will do basic > validation, before parse the data. > + > + @param[in] VariableName Pointer to variable name. > + @param[in] VendorGuid Variable Vendor Guid. > + @param[out] VariablePtr Pointer to variable header address. > + > + @retval EFI_SUCCESS The function completed successfully. > + @retval EFI_NOT_FOUND The next variable was not found. > + @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, > while VendorGuid is NULL. > + @retval EFI_INVALID_PARAMETER The input values of VariableName and > VendorGuid are not a name and > + GUID of an existing variable. > + > +**/ > +EFI_STATUS > +EFIAPI > +VariableServiceGetNextVariableInternal ( > + IN CHAR16 *VariableName, > + IN EFI_GUID *VendorGuid, > + OUT VARIABLE_HEADER **VariablePtr > + ) > +{ > + VARIABLE_STORE_TYPE Type; > + VARIABLE_POINTER_TRACK Variable; > + VARIABLE_POINTER_TRACK VariableInHob; > + VARIABLE_POINTER_TRACK VariablePtrTrack; > + EFI_STATUS Status; > + VARIABLE_STORE_HEADER > *VariableStoreHeader[VariableStoreTypeMax]; > + > + Status =3D FindVariable (VariableName, VendorGuid, &Variable, > &mVariableModuleGlobal->VariableGlobal, FALSE); > + if (Variable.CurrPtr =3D=3D NULL || EFI_ERROR (Status)) { > + // > + // For VariableName is an empty string, FindVariable() will try to f= ind and > return > + // the first qualified variable, and if FindVariable() returns error > (EFI_NOT_FOUND) > + // as no any variable is found, still go to return the error > (EFI_NOT_FOUND). > + // > + if (VariableName[0] !=3D 0) { > + // > + // For VariableName is not an empty string, and FindVariable() ret= urns > error as > + // VariableName and VendorGuid are not a name and GUID of an > existing variable, > + // there is no way to get next variable, follow spec to return > EFI_INVALID_PARAMETER. > + // > + Status =3D EFI_INVALID_PARAMETER; > + } > + goto Done; > + } > + > + if (VariableName[0] !=3D 0) { > + // > + // If variable name is not NULL, get next variable. > + // > + Variable.CurrPtr =3D GetNextVariablePtr (Variable.CurrPtr); > + } > + > + // > + // 0: Volatile, 1: HOB, 2: Non-Volatile. > + // The index and attributes mapping must be kept in this order as > FindVariable > + // makes use of this mapping to implement search algorithm. > + // > + VariableStoreHeader[VariableStoreTypeVolatile] =3D > (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal- > >VariableGlobal.VolatileVariableBase; > + VariableStoreHeader[VariableStoreTypeHob] =3D > (VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal- > >VariableGlobal.HobVariableBase; > + VariableStoreHeader[VariableStoreTypeNv] =3D mNvVariableCache; > + > + while (TRUE) { > + // > + // Switch from Volatile to HOB, to Non-Volatile. > + // > + while (!IsValidVariableHeader (Variable.CurrPtr, Variable.EndPtr)) { > + // > + // Find current storage index > + // > + for (Type =3D (VARIABLE_STORE_TYPE) 0; Type < VariableStoreTypeMax= ; > Type++) { > + if ((VariableStoreHeader[Type] !=3D NULL) && (Variable.StartPtr = =3D=3D > GetStartPointer (VariableStoreHeader[Type]))) { > + break; > + } > + } > + ASSERT (Type < VariableStoreTypeMax); > + // > + // Switch to next storage > + // > + for (Type++; Type < VariableStoreTypeMax; Type++) { > + if (VariableStoreHeader[Type] !=3D NULL) { > + break; > + } > + } > + // > + // Capture the case that > + // 1. current storage is the last one, or > + // 2. no further storage > + // > + if (Type =3D=3D VariableStoreTypeMax) { > + Status =3D EFI_NOT_FOUND; > + goto Done; > + } > + Variable.StartPtr =3D GetStartPointer (VariableStoreHeader[Type]); > + Variable.EndPtr =3D GetEndPointer (VariableStoreHeader[Type]); > + Variable.CurrPtr =3D Variable.StartPtr; > + } > + > + // > + // Variable is found > + // > + if (Variable.CurrPtr->State =3D=3D VAR_ADDED || Variable.CurrPtr->St= ate =3D=3D > (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) { > + if (!AtRuntime () || ((Variable.CurrPtr->Attributes & > EFI_VARIABLE_RUNTIME_ACCESS) !=3D 0)) { > + if (Variable.CurrPtr->State =3D=3D (VAR_IN_DELETED_TRANSITION & > VAR_ADDED)) { > + // > + // If it is a IN_DELETED_TRANSITION variable, > + // and there is also a same ADDED one at the same time, > + // don't return it. > + // > + VariablePtrTrack.StartPtr =3D Variable.StartPtr; > + VariablePtrTrack.EndPtr =3D Variable.EndPtr; > + Status =3D FindVariableEx ( > + GetVariableNamePtr (Variable.CurrPtr), > + GetVendorGuidPtr (Variable.CurrPtr), > + FALSE, > + &VariablePtrTrack > + ); > + if (!EFI_ERROR (Status) && VariablePtrTrack.CurrPtr->State =3D= =3D > VAR_ADDED) { > + Variable.CurrPtr =3D GetNextVariablePtr (Variable.CurrPtr); > + continue; > + } > + } > + > + // > + // Don't return NV variable when HOB overrides it > + // > + if ((VariableStoreHeader[VariableStoreTypeHob] !=3D NULL) && > (VariableStoreHeader[VariableStoreTypeNv] !=3D NULL) && > + (Variable.StartPtr =3D=3D GetStartPointer > (VariableStoreHeader[VariableStoreTypeNv])) > + ) { > + VariableInHob.StartPtr =3D GetStartPointer > (VariableStoreHeader[VariableStoreTypeHob]); > + VariableInHob.EndPtr =3D GetEndPointer > (VariableStoreHeader[VariableStoreTypeHob]); > + Status =3D FindVariableEx ( > + GetVariableNamePtr (Variable.CurrPtr), > + GetVendorGuidPtr (Variable.CurrPtr), > + FALSE, > + &VariableInHob > + ); > + if (!EFI_ERROR (Status)) { > + Variable.CurrPtr =3D GetNextVariablePtr (Variable.CurrPtr); > + continue; > + } > + } > + > + *VariablePtr =3D Variable.CurrPtr; > + Status =3D EFI_SUCCESS; > + goto Done; > + } > + } > + > + Variable.CurrPtr =3D GetNextVariablePtr (Variable.CurrPtr); > + } > + > +Done: > + return Status; > +} > + > +/** > + Routine used to track statistical information about variable usage. > + The data is stored in the EFI system table so it can be accessed later= . > + VariableInfo.efi can dump out the table. Only Boot Services variable > + accesses are tracked by this code. The PcdVariableCollectStatistics > + build flag controls if this feature is enabled. > + > + A read that hits in the cache will have Read and Cache true for > + the transaction. Data is allocated by this routine, but never > + freed. > + > + @param[in] VariableName Name of the Variable to track. > + @param[in] VendorGuid Guid of the Variable to track. > + @param[in] Volatile TRUE if volatile FALSE if non-volatile. > + @param[in] Read TRUE if GetVariable() was called. > + @param[in] Write TRUE if SetVariable() was called. > + @param[in] Delete TRUE if deleted via SetVariable(). > + @param[in] Cache TRUE for a cache hit. > + > +**/ > +VOID > +UpdateVariableInfo ( > + IN CHAR16 *VariableName, > + IN EFI_GUID *VendorGuid, > + IN BOOLEAN Volatile, > + IN BOOLEAN Read, > + IN BOOLEAN Write, > + IN BOOLEAN Delete, > + IN BOOLEAN Cache > + ) > +{ > + VARIABLE_INFO_ENTRY *Entry; > + > + if (FeaturePcdGet (PcdVariableCollectStatistics)) { > + > + if (AtRuntime ()) { > + // Don't collect statistics at runtime. > + return; > + } > + > + if (gVariableInfo =3D=3D NULL) { > + // > + // On the first call allocate a entry and place a pointer to it in > + // the EFI System Table. > + // > + gVariableInfo =3D AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY)); > + ASSERT (gVariableInfo !=3D NULL); > + > + CopyGuid (&gVariableInfo->VendorGuid, VendorGuid); > + gVariableInfo->Name =3D AllocateZeroPool (StrSize (VariableName)); > + ASSERT (gVariableInfo->Name !=3D NULL); > + StrCpyS (gVariableInfo->Name, StrSize(VariableName)/sizeof(CHAR16)= , > VariableName); > + gVariableInfo->Volatile =3D Volatile; > + } > + > + > + for (Entry =3D gVariableInfo; Entry !=3D NULL; Entry =3D Entry->Next= ) { > + if (CompareGuid (VendorGuid, &Entry->VendorGuid)) { > + if (StrCmp (VariableName, Entry->Name) =3D=3D 0) { > + if (Read) { > + Entry->ReadCount++; > + } > + if (Write) { > + Entry->WriteCount++; > + } > + if (Delete) { > + Entry->DeleteCount++; > + } > + if (Cache) { > + Entry->CacheCount++; > + } > + > + return; > + } > + } > + > + if (Entry->Next =3D=3D NULL) { > + // > + // If the entry is not in the table add it. > + // Next iteration of the loop will fill in the data. > + // > + Entry->Next =3D AllocateZeroPool (sizeof (VARIABLE_INFO_ENTRY)); > + ASSERT (Entry->Next !=3D NULL); > + > + CopyGuid (&Entry->Next->VendorGuid, VendorGuid); > + Entry->Next->Name =3D AllocateZeroPool (StrSize (VariableName)); > + ASSERT (Entry->Next->Name !=3D NULL); > + StrCpyS (Entry->Next->Name, StrSize(VariableName)/sizeof(CHAR16)= , > VariableName); > + Entry->Next->Volatile =3D Volatile; > + } > + > + } > + } > +} > diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c > b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c > index ec463d063e..ce409f22a3 100644 > --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c > +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c > @@ -30,6 +30,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent >=20 > #include > #include "Variable.h" > +#include "VariableParsing.h" >=20 > BOOLEAN mAtRuntime = =3D FALSE; > UINT8 *mVariableBufferPay= load =3D NULL; > -- > 2.16.2.windows.1