UefiCpuPkg/PiSmmCpuDxeSmm: implement non-stop mode for SMM

Since SMM profile feature has already implemented non-stop mode if #PF
occurred, this patch just makes use of the existing implementation to
accommodate heap guard and NULL pointer detection feature.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>

UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.h

@@ -114,6 +114,17 @@ GetCpuIndex (
   VOID
   );
 
+/**
+  Handler for Page Fault triggered by Guard page.
+
+  @param  ErrorCode  The Error code of exception.
+
+**/
+VOID
+GuardPagePFHandler (
+  UINTN ErrorCode
+  );
+
 //
 // The flag indicates if execute-disable is supported by processor.
 //
@@ -122,5 +133,9 @@ extern BOOLEAN    mXdSupported;
 // The flag indicates if execute-disable is enabled on processor.
 //
 extern BOOLEAN    mXdEnabled;
+//
+// The flag indicates if #DB will be setup in #PF handler.
+//
+extern BOOLEAN    mSetupDebugTrap;
 
 #endif // _SMM_PROFILE_H_