--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/impl/KernelError.cbc	Thu Feb 06 17:40:44 2020 +0900
@@ -0,0 +1,46 @@
+#include "../context.h"
+#interface "Error.h"
+
+// ----
+// typedef struct KernelError <Type, Isa> impl Error {
+//   __code infinity_loop(Type* error, next(...));
+// } KernelError;
+// ----
+
+Error* createKernelError(struct Context* cbc_context) {
+    struct Error* error  = new Error();
+    struct KernelError* kernel_error = new KernelError();
+    error->error = (union Data*)kernel_error;
+    kernel_error->error = (union Data*)kernel_error;
+    kernel_error->t  = 0;
+    kernel_error->infinity_loop = C_infinity_loop;
+    error->error = C_errorKernelError;
+    error->panic = C_panicKernelError;
+    return error;
+}
+__code infinity_loopKernelError(struct KernelError* error, next(...)) {
+
+}
+
+__code errorKernelError(struct KernelError* error, int err_code, __code next(...)) {
+
+    goto next(...);
+}
+
+__code panicKernelError(struct KernelError* error, char* msg) {
+    extern struct cpu* cpu;
+    extern struct { struct spinlock lock; int locking; } cons;
+    extern int panicked;
+
+    cli();
+    cons.locking = 0;
+
+    cprintf("cpu%d: panic: ", cpu->id);
+
+    show_callstk(msg);
+    panicked = 1; // freeze other CPU
+
+    goto infinity_loopKernelError(error_gear, error_gear->inifinity_loop);
+}
+
+

--- a/src/impl/KernelError.h	Thu Feb 06 16:56:50 2020 +0900
+++ b/src/impl/KernelError.h	Thu Feb 06 17:40:44 2020 +0900
@@ -1,3 +1,3 @@
-typedef struct KernelError <Type, Isa> impl ErrorGear {
-  __code infinity_loop(Type* error_gear,__code next(...));
+typedef struct KernelError <Type, Isa> impl Error {
+  __code infinity_loop(Type* error, next(...));
 } KernelError;

--- a/src/impl/kernel_error.cbc	Thu Feb 06 16:56:50 2020 +0900
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,47 +0,0 @@
-#include "param.h"
-#include "proc.h"
-#interface "ErrorGear.h"
-
-// ----
-// typedef struct KernelError <Type, Isa> impl ErrorGear {
-//   __code infinity_loop(Type* error_gear,__code next(...));
-// } KernelError;
-// ----
-
-ErrorGear* createKernelError(struct Context* cbc_context) {
-    struct ErrorGear* error_gear  = new ErrorGear();
-    struct KernelError* kernel_error = new KernelError();
-    error_gear->error_gear = (union Data*)kernel_error;
-    kernel_error->error_gear = NULL;
-    kernel_error->infinity_loop = C_infinity_loopKernelError;
-    error_gear->error = C_errorKernelError;
-    error_gear->panic = C_panicKernelError;
-    return error_gear;
-}
-
-__code infinity_loopKernelError(struct KernelError* error_gear,__code next(...)) {
-    goto next(...);
-}
-
-__code errorKernelError(struct KernelError* error_gear, int err_code, __code next(...)) {
-
-    goto next(...);
-}
-
-__code panicKernelError(struct KernelError* error_gear, char* msg) {
-    extern struct cpu* cpu;
-    extern struct { struct spinlock lock; int locking; } cons;
-    extern int panicked;
-
-    cli();
-    cons.locking = 0;
-
-    cprintf("cpu%d: panic: ", cpu->id);
-
-    show_callstk(msg);
-    panicked = 1; // freeze other CPU
-
-    goto infinity_loopKernelError(error_gear, error_gear->inifinity_loop);
-}
-
-

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/interface/Error.h	Thu Feb 06 17:40:44 2020 +0900
@@ -0,0 +1,5 @@
+typedef struct Error <Type, Impl> {
+  __code error(Impl* error, int err_code, __code next(...));
+  __code panic(Impl* error, char* msg);
+  __code next(...);
+} Error;

--- a/src/interface/ErrorGear.h	Thu Feb 06 16:56:50 2020 +0900
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,5 +0,0 @@
-typedef struct ErrorGear <Type, Impl> {
-  __code error(Impl* error_gear, int err_code, __code next(...));
-  __code panic(Impl* error_gear, char* msg);
-  __code next(...);
-} ErrorGear;