Rework trap handling to access registers

xtoskrnl/CMakeLists.txt

@@ -8,6 +8,7 @@ include_directories(
 
 # Specify list of source code files
 list(APPEND XTOSKRNL_SOURCE
+    ${XTOSKRNL_SOURCE_DIR}/ar/${ARCH}/archsup.S
     ${XTOSKRNL_SOURCE_DIR}/ar/${ARCH}/cpufunc.c
     ${XTOSKRNL_SOURCE_DIR}/ar/${ARCH}/globals.c
     ${XTOSKRNL_SOURCE_DIR}/ar/${ARCH}/procsup.c