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

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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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32
MdeModulePkg/Universal/PCD/Dxe/Service.c
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@@ -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
@@ -457,25 +457,33 @@ 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 (GetSize == 0) {
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;
}
}
//
// It is a pointer type. So get the MaxSize reserved for
// this PCD entry.
// If the operation is successful, we copy the data
// to the default value buffer in the PCD Database.
// So that we can free the Data allocated in GetHiiVariable.
//
GetPtrTypeSize (TmpTokenNumber, &GetSize);
CopyMem (VaraiableDefaultBuffer, Data + VariableHead->Offset, GetSize);
}
//
// If the operation is successful, we copy the data
// to the default value buffer in the PCD Database.
// So that we can free the Data allocated in GetHiiVariable.
//
CopyMem (VaraiableDefaultBuffer, Data + VariableHead->Offset, GetSize);
FreePool (Data);
}
RetPtr = (VOID *) VaraiableDefaultBuffer;