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Align the top of the stack correctly when the PEI Core calls SwitchStack() 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2022 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
mdkinney 2006-11-28 02:42:44 +00:00
parent 4a32862018
commit 62332e5da3
1 changed files with 6 additions and 4 deletions
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10
EdkModulePkg/Core/Pei/Dispatcher/Dispatcher.c
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@ -63,6 +63,7 @@ Returns:
BOOLEAN NextFvFound;
EFI_FIRMWARE_VOLUME_HEADER *NextFvAddress;
EFI_FIRMWARE_VOLUME_HEADER *DefaultFvAddress;
VOID *TopOfStack;
//
// Debug data for uninstalled Peim list
//
@ -204,15 +205,16 @@ Returns:
PrivateDataInMem = (UINTN) TransferOldDataToNewDataRange (PrivateData);
ASSERT (PrivateDataInMem != 0);
//
//Subtract 0x10 from the 4th parameter indicating the new stack base,
//in order to provide buffer protection against possible illegal stack
//access that might corrupt the stack.
// Adjust the top of stack to be aligned at CPU_STACK_ALIGNMENT
//
TopOfStack = (VOID *)((UINTN)PrivateData->StackBase + (UINTN)PrivateData->StackSize - CPU_STACK_ALIGNMENT);
TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
PeiSwitchStacks (
(SWITCH_STACK_ENTRY_POINT)(UINTN)TempPtr.Raw,
PeiStartupDescriptor,
(VOID*)PrivateDataInMem,
(VOID*)((UINTN)PrivateData->StackBase + (UINTN)PrivateData->StackSize),
TopOfStack,
(VOID*)(UINTN)PrivateData->StackBase
);
}