--- a/src/sysfile.cbc	Sat Oct 19 16:44:24 2019 +0900
+++ b/src/sysfile.cbc	Sat Oct 19 18:44:57 2019 +0900
@@ -15,14 +15,15 @@
 #include "fcntl.h"
 
 #include "arm.h"
+#include "syscall.h"
 #interface "CbCSysFile.h"
 
-extern int SYS_exec;
 #define __ncode __code
 
 struct CbCSysFile* create_cbc_sys_file(struct Context* cbc_context) {
   struct CbCSysFile* cbc_file = new CbCSysFile();
   cbc_file->read = C_cbc_fileread;
+  cbc_file->cbc_file_ret = C_cbc_file_ret;
   return cbc_file;
 }
 
@@ -100,31 +101,27 @@
     return fd;
 }
 
-__ncode cbc_read(__code (*next)(int ret)){
+__code cbc_read(struct CbCSysFile* cbc_file){
+    //struct CbCSysFile* cbc_file = create_cbc_sys_file(cbc_context);
+    goto cbc_fileread();
+}
+
+__code cbc_read_stub(struct Context* cbc_context){
     struct file *f;
     int n;
     char *p;
-
+    
+    CbCSysFile* cbc_sys_file = (CbCSysFile*)Gearef(cbc_context,CbCSysFile);
     if(argfd(0, 0, &f) < 0 || argint(2, &n) < 0 || argptr(1, &p, n) < 0) {
-        goto next(-1);
+        //__code cbc_file_ret(struct CbCSysFile* cbc_sys_file, struct UInteger* ret){
+        UInteger* ret = (UInteger*)Gearef(cbc_context,UInteger);
+        ret->value = -1;
+        goto cbc_file_ret(cbc_context, cbc_sys_file, ret);
     }
-    goto cbc_fileread(f, p, n, next);
-}
-
-
-__code file_read(struct file *f, char *p, int n, __code next(...)){
-   goto cbc_fileread(f, p, n, next);
-}
-
-__code file_read_stub(struct Context* cbc_context, __code next(...)){
-    struct CbCSysfile* cbc_file = create_cbc_sys_file(cbc_context);
-    struct file *f;
-    int n;
-    char *p;
-    if(argfd(0, 0, &f) < 0 || argint(2, &n) < 0 || argptr(1, &p, n) < 0) {
-        goto next(-1);
-    }
-    goto file_read(cbc_context,f, p, n, next);
+    cbc_sys_file->f = f;
+    cbc_sys_file->n = n;
+    cbc_sys_file->p = p;
+    goto cbc_read(cbc_context,cbc_sys_file);
 }
 
 int sys_read(void)