Add KSWITCH_FRAME definition for i686 architecture

sdk/xtdk/i686/ketypes.h

@@ -324,6 +324,14 @@ typedef struct _KEXCEPTION_FRAME
     ULONG PlaceHolder;
 } KEXCEPTION_FRAME, *PKEXCEPTION_FRAME;
 
+/* Switch frame definition */
+typedef struct _KSWITCH_FRAME
+{
+    PVOID ExceptionList;
+    BOOLEAN ApcBypass;
+    PVOID ReturnAddress;
+} KSWITCH_FRAME, *PKSWITCH_FRAME;
+
 /* Trap frame definition */
 typedef struct _KTRAP_FRAME
 {

sdk/xtdk/i686/xtstruct.h

@@ -37,6 +37,7 @@ typedef struct _KPROCESSOR_BLOCK KPROCESSOR_BLOCK, *PKPROCESSOR_BLOCK;
 typedef struct _KPROCESSOR_CONTROL_BLOCK KPROCESSOR_CONTROL_BLOCK, *PKPROCESSOR_CONTROL_BLOCK;
 typedef struct _KPROCESSOR_STATE KPROCESSOR_STATE, *PKPROCESSOR_STATE;
 typedef struct _KSPECIAL_REGISTERS KSPECIAL_REGISTERS, *PKSPECIAL_REGISTERS;
+typedef struct _KSWITCH_FRAME KSWITCH_FRAME, *PKSWITCH_FRAME;
 typedef struct _KTRAP_FRAME KTRAP_FRAME, *PKTRAP_FRAME;
 typedef struct _KTSS KTSS, *PKTSS;