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Update the heap migration logic to avoid memory overflow.

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Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15036 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Liming Gao 2014-01-02 07:16:09 +00:00 committed by lgao4
parent d958a7e0bc
commit 18d3e28062
1 changed files with 4 additions and 1 deletions
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5
MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
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@ -661,6 +661,7 @@ PeiDispatcher (
PEIM_FILE_HANDLE_EXTENDED_DATA ExtendedData;
EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI *TemporaryRamSupportPpi;
UINT64 NewStackSize;
UINTN HeapTemporaryRamSize;
EFI_PHYSICAL_ADDRESS BaseOfNewHeap;
EFI_PHYSICAL_ADDRESS TopOfNewStack;
EFI_PHYSICAL_ADDRESS TopOfOldStack;
@ -1018,7 +1019,9 @@ PeiDispatcher (
//
// Migrate Heap
//
CopyMem ((UINT8 *) (UINTN) BaseOfNewHeap, (UINT8 *) PeiTemporaryRamBase, PeiTemporaryRamSize);
HeapTemporaryRamSize = (UINTN) (Private->HobList.HandoffInformationTable->EfiFreeMemoryBottom - Private->HobList.HandoffInformationTable->EfiMemoryBottom);
ASSERT (BaseOfNewHeap + HeapTemporaryRamSize <= Private->FreePhysicalMemoryTop);
CopyMem ((UINT8 *) (UINTN) BaseOfNewHeap, (UINT8 *) PeiTemporaryRamBase, HeapTemporaryRamSize);
//
// Migrate Stack