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.

(Sync patch r18949 from main trunk.)

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/branches/UDK2015@19126 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 13 insertions, 13 deletions

diff --git a/MdeModulePkg/Core/PiSmmCore/PiSmmIpl.c b/MdeModulePkg/Core/PiSmmCore/PiSmmIpl.c
index c534ee3701..50c3b34dfd 100644
--- a/MdeModulePkg/Core/PiSmmCore/PiSmmIpl.c
+++ b/MdeModulePkg/Core/PiSmmCore/PiSmmIpl.c
@@ -246,6 +246,8 @@ BOOLEAN                    mSmmLocked = FALSE;
 EFI_PHYSICAL_ADDRESS       mSmramCacheBase;

 UINT64                     mSmramCacheSize;

 

+EFI_SMM_COMMUNICATE_HEADER mCommunicateHeader;

+

 //

 // Table of Protocol notification and GUIDed Event notifications that the SMM IPL requires

 //

@@ -538,21 +540,20 @@ SmmIplGuidedEventNotify (
   IN VOID       *Context

   )

 {

-  EFI_SMM_COMMUNICATE_HEADER  CommunicateHeader;

   UINTN                       Size;

 

   //

   // Use Guid to initialize EFI_SMM_COMMUNICATE_HEADER structure 

   //

-  CopyGuid (&CommunicateHeader.HeaderGuid, (EFI_GUID *)Context);

-  CommunicateHeader.MessageLength = 1;

-  CommunicateHeader.Data[0] = 0;

+  CopyGuid (&mCommunicateHeader.HeaderGuid, (EFI_GUID *)Context);

+  mCommunicateHeader.MessageLength = 1;

+  mCommunicateHeader.Data[0] = 0;

 

   //

   // Generate the Software SMI and return the result

   //

-  Size = sizeof (CommunicateHeader);

-  SmmCommunicationCommunicate (&mSmmCommunication, &CommunicateHeader, &Size);

+  Size = sizeof (mCommunicateHeader);

+  SmmCommunicationCommunicate (&mSmmCommunication, &mCommunicateHeader, &Size);

 }

 

 /**

@@ -569,7 +570,6 @@ SmmIplDxeDispatchEventNotify (
   IN VOID       *Context

   )

 {

-  EFI_SMM_COMMUNICATE_HEADER  CommunicateHeader;

   UINTN                       Size;

   EFI_STATUS                  Status;

 

@@ -582,20 +582,20 @@ SmmIplDxeDispatchEventNotify (
     // Clear the buffer passed into the Software SMI.  This buffer will return

     // the status of the SMM Core Dispatcher.

     //

-    CopyGuid (&CommunicateHeader.HeaderGuid, (EFI_GUID *)Context);

-    CommunicateHeader.MessageLength = 1;

-    CommunicateHeader.Data[0] = 0;

+    CopyGuid (&mCommunicateHeader.HeaderGuid, (EFI_GUID *)Context);

+    mCommunicateHeader.MessageLength = 1;

+    mCommunicateHeader.Data[0] = 0;

 

     //

     // Generate the Software SMI and return the result

     //

-    Size = sizeof (CommunicateHeader);

-    SmmCommunicationCommunicate (&mSmmCommunication, &CommunicateHeader, &Size);

+    Size = sizeof (mCommunicateHeader);

+    SmmCommunicationCommunicate (&mSmmCommunication, &mCommunicateHeader, &Size);

     

     //

     // Return if there is no request to restart the SMM Core Dispatcher

     //

-    if (CommunicateHeader.Data[0] != COMM_BUFFER_SMM_DISPATCH_RESTART) {

+    if (mCommunicateHeader.Data[0] != COMM_BUFFER_SMM_DISPATCH_RESTART) {

       return;

     }