--- a/pointer_longjump.c	Sat Nov 23 23:31:02 2013 +0900
+++ b/pointer_longjump.c	Sun Nov 24 01:10:16 2013 +0900
@@ -14,13 +14,13 @@
 
 int main1 (){
   __code (*__return)();
-  void *__environment ;
-  int  retval;
+  void *__environment;
   int  *__ret_p;
   jmp_buf j_buf;
+  int retval;
   __ret_p = &retval;
+  __environment = &j_buf;
   printf("main1 : main1 entry\n");
-  __environment = &j_buf;
   if (setjmp(__environment)){
     printf("main1 : main1 return\n");
     return retval;

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/struct_longjump.c	Sun Nov 24 01:10:16 2013 +0900
@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <setjmp.h>
+
+struct CbC_env {
+  void *ret_p,*env;
+};
+
+__code code1(int n,__code(*__return)(int,void *),void *__environment){
+  printf("code1 : code entry1\n");
+  goto __return(n,__environment);
+}
+
+__code return1 (int n,void* env){
+  printf("return1 : __return entry\n");
+  *(int*)((struct CbC_env *)(env))->ret_p = n;
+  longjmp(*(jmp_buf*)(((struct CbC_env *)env)->env),1);
+}
+
+int main1 (){
+  __code (*__return)();
+  struct CbC_env __environment;
+  jmp_buf j_buf;
+  int retval;
+  __environment.ret_p = &retval;
+  __environment.env = &j_buf;
+  printf("main1 : main1 entry\n");
+  if (setjmp(__environment.env)){
+    printf("main1 : main1 return\n");
+    return *((int *)__environment.ret_p);
+  }
+  __return = return1;
+  goto code1(30,__return,&__environment);
+  return 0;
+}
+
+int main (){
+  int n;
+  n = main1();
+  printf("returned\n");
+  printf("return = %d\n",n);
+  return 1;
+}