mirror of https://github.com/acidanthera/audk.git
Move CommunicationBuffer from stack to global variable.
We had put communication buffer to Runtime memory, so that SMI handler can know it is not used by OS. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com> Reviewed-by: "Zeng, Star" <star.zeng@intel.com> Reviewed-by: "Kinney, Michael D" <michael.d.kinney@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18949 6f19259b-4bc3-4df7-8a09-765794883524
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@ -246,6 +246,8 @@ BOOLEAN mSmmLocked = FALSE;
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EFI_PHYSICAL_ADDRESS mSmramCacheBase;
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UINT64 mSmramCacheSize;
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EFI_SMM_COMMUNICATE_HEADER mCommunicateHeader;
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//
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// Table of Protocol notification and GUIDed Event notifications that the SMM IPL requires
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//
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@ -538,21 +540,20 @@ SmmIplGuidedEventNotify (
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IN VOID *Context
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)
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{
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EFI_SMM_COMMUNICATE_HEADER CommunicateHeader;
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UINTN Size;
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//
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// Use Guid to initialize EFI_SMM_COMMUNICATE_HEADER structure
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//
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CopyGuid (&CommunicateHeader.HeaderGuid, (EFI_GUID *)Context);
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CommunicateHeader.MessageLength = 1;
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CommunicateHeader.Data[0] = 0;
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CopyGuid (&mCommunicateHeader.HeaderGuid, (EFI_GUID *)Context);
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mCommunicateHeader.MessageLength = 1;
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mCommunicateHeader.Data[0] = 0;
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//
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// Generate the Software SMI and return the result
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//
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Size = sizeof (CommunicateHeader);
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SmmCommunicationCommunicate (&mSmmCommunication, &CommunicateHeader, &Size);
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Size = sizeof (mCommunicateHeader);
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SmmCommunicationCommunicate (&mSmmCommunication, &mCommunicateHeader, &Size);
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}
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/**
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@ -569,7 +570,6 @@ SmmIplDxeDispatchEventNotify (
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IN VOID *Context
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)
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{
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EFI_SMM_COMMUNICATE_HEADER CommunicateHeader;
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UINTN Size;
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EFI_STATUS Status;
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@ -582,20 +582,20 @@ SmmIplDxeDispatchEventNotify (
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// Clear the buffer passed into the Software SMI. This buffer will return
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// the status of the SMM Core Dispatcher.
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//
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CopyGuid (&CommunicateHeader.HeaderGuid, (EFI_GUID *)Context);
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CommunicateHeader.MessageLength = 1;
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CommunicateHeader.Data[0] = 0;
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CopyGuid (&mCommunicateHeader.HeaderGuid, (EFI_GUID *)Context);
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mCommunicateHeader.MessageLength = 1;
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mCommunicateHeader.Data[0] = 0;
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//
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// Generate the Software SMI and return the result
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//
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Size = sizeof (CommunicateHeader);
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SmmCommunicationCommunicate (&mSmmCommunication, &CommunicateHeader, &Size);
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Size = sizeof (mCommunicateHeader);
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SmmCommunicationCommunicate (&mSmmCommunication, &mCommunicateHeader, &Size);
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//
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// Return if there is no request to restart the SMM Core Dispatcher
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//
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if (CommunicateHeader.Data[0] != COMM_BUFFER_SMM_DISPATCH_RESTART) {
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if (mCommunicateHeader.Data[0] != COMM_BUFFER_SMM_DISPATCH_RESTART) {
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return;
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}
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