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MdeModulePkg PCD: Fix PCD driver to return default data if size mismatch. 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15357 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng 2014-03-21 01:16:07 +00:00 committed by lzeng14
parent 68d151bbc9
commit 553e86699d
2 changed files with 51 additions and 25 deletions
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12
MdeModulePkg/Universal/PCD/Dxe/Service.c
View File

@ -1,7 +1,7 @@
/** @file
Help functions used by PCD DXE driver.
Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
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
@ -457,18 +457,25 @@ GetWorker (
// string array in string table.
//
StringTableIdx = *(STRING_HEAD*)((UINT8 *) PcdDb + VariableHead->DefaultValueOffset);
VaraiableDefaultBuffer = (VOID *) (StringTable + StringTableIdx);
VaraiableDefaultBuffer = (UINT8 *) (StringTable + StringTableIdx);
} else {
VaraiableDefaultBuffer = (UINT8 *) PcdDb + VariableHead->DefaultValueOffset;
}
Status = GetHiiVariable (Guid, Name, &Data, &DataSize);
if (Status == EFI_SUCCESS) {
if (DataSize >= (VariableHead->Offset + GetSize)) {
if (GetSize == 0) {
//
// It is a pointer type. So get the MaxSize reserved for
// this PCD entry.
//
GetPtrTypeSize (TmpTokenNumber, &GetSize);
if (GetSize > (DataSize - VariableHead->Offset)) {
//
// Use actual valid size.
//
GetSize = DataSize - VariableHead->Offset;
}
}
//
// If the operation is successful, we copy the data
@ -476,6 +483,7 @@ GetWorker (
// So that we can free the Data allocated in GetHiiVariable.
//
CopyMem (VaraiableDefaultBuffer, Data + VariableHead->Offset, GetSize);
}
FreePool (Data);
}
RetPtr = (VOID *) VaraiableDefaultBuffer;

40
MdeModulePkg/Universal/PCD/Pei/Service.c
View File

@ -2,7 +2,7 @@
The driver internal functions are implmented here.
They build Pei PCD database, and provide access service to PCD database.
Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
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
@ -947,6 +947,7 @@ GetWorker (
PEI_PCD_DATABASE *PeiPcdDb;
UINT32 LocalTokenNumber;
UINT32 LocalTokenCount;
UINT8 *VaraiableDefaultBuffer;
//
// TokenNumber Zero is reserved as PCD_INVALID_TOKEN_NUMBER.
@ -986,20 +987,37 @@ GetWorker (
Guid = (EFI_GUID *) ((UINT8 *)PeiPcdDb + PeiPcdDb->GuidTableOffset) + VariableHead->GuidTableIndex;
Name = (UINT16*)&StringTable[VariableHead->StringIndex];
Status = GetHiiVariable (Guid, Name, &Data, &DataSize);
if (Status == EFI_SUCCESS) {
return (VOID *) ((UINT8 *) Data + VariableHead->Offset);
} else {
//
// Return the default value specified by Platform Integrator
//
if ((LocalTokenNumber & PCD_TYPE_ALL_SET) == (PCD_TYPE_HII|PCD_TYPE_STRING)) {
return (VOID*)&StringTable[*(STRING_HEAD*)((UINT8*)PeiPcdDb + VariableHead->DefaultValueOffset)];
//
// If a HII type PCD's datum type is VOID*, the DefaultValueOffset is the index of
// string array in string table.
//
VaraiableDefaultBuffer = (UINT8 *) &StringTable[*(STRING_HEAD*)((UINT8*) PeiPcdDb + VariableHead->DefaultValueOffset)];
} else {
return (VOID *) ((UINT8 *) PeiPcdDb + VariableHead->DefaultValueOffset);
VaraiableDefaultBuffer = (UINT8 *) PeiPcdDb + VariableHead->DefaultValueOffset;
}
Status = GetHiiVariable (Guid, Name, &Data, &DataSize);
if ((Status == EFI_SUCCESS) && (DataSize >= (VariableHead->Offset + GetSize))) {
if (GetSize == 0) {
//
// It is a pointer type. So get the MaxSize reserved for
// this PCD entry.
//
GetPtrTypeSize (TokenNumber, &GetSize, PeiPcdDb);
if (GetSize > (DataSize - VariableHead->Offset)) {
//
// Use actual valid size.
//
GetSize = DataSize - VariableHead->Offset;
}
}
//
// If the operation is successful, we copy the data
// to the default value buffer in the PCD Database.
//
CopyMem (VaraiableDefaultBuffer, (UINT8 *) Data + VariableHead->Offset, GetSize);
}
return (VOID *) VaraiableDefaultBuffer;
}
case PCD_TYPE_DATA: