diff -ruN kozos40/extintr.c kozos41/extintr.c
--- kozos40/extintr.c	Sun Feb  1 23:23:47 2009
+++ kozos41/extintr.c	Thu Feb 26 22:57:59 2009
@@ -8,6 +8,8 @@
 #include "extintr.h"
 #include "extsub.h"
 
+#define USE_MESSAGE
+
 #define BUFFER_SIZE 1024
 
 int extintr_id;
@@ -56,6 +58,8 @@
 
 typedef int (*initfunc)(struct interrupts *intp);
 
+static void extintr_handler(int signo);
+
 static int timerreg_init()
 {
   int i;
@@ -110,7 +114,11 @@
   close(cnt_fildes[0]); /* 読み込み端 */
   control_fd = cnt_fildes[1]; /* 書き込み端 */
 
+#ifdef USE_MESSAGE
   kz_setsig(SIGHUP);
+#else
+  kz_sethandler(SIGHUP, extintr_handler);
+#endif
 
   for (i = 0; i < EXTINTR_TIMER_NUM; i++) {
     trp = &timerreg[i];
@@ -196,6 +204,7 @@
 
   old_n = n;
 
+#ifdef USE_MESSAGE
   if (id) {
     intrpri_old     = intrpri_current;
     intrpri_current = n;
@@ -203,6 +212,13 @@
       kx_send(extintr_id, 0, NULL);
     }
   }
+#else
+  intrpri_old     = intrpri_current;
+  intrpri_current = n;
+  if (intrpri_current > intrpri_old) {
+    extintr_handler(SIGHUP);
+  }
+#endif
 
   return;
 }
@@ -239,7 +255,11 @@
   char c;
   size = read(intp->regs.timer->read_fd, &c, 1);
   if ((size >= 0) && intp->id) {
+#ifdef USE_MESSAGE
     kz_send(intp->id, 0, NULL);
+#else
+    kx_send(intp->id, 0, NULL);
+#endif
   }
   return 0;
 }
@@ -312,12 +332,24 @@
   int size;
   char *buffer;
 
+#ifdef USE_MESSAGE
   buffer = kz_kmalloc(BUFFER_SIZE);
+#else
+  buffer = kx_kmalloc(BUFFER_SIZE);
+#endif
   size = read(intp->regs.cons->read_fd, buffer, BUFFER_SIZE);
   if ((size >= 0) && intp->id)
+#ifdef USE_MESSAGE
     kz_send(intp->id, size, buffer);
+#else
+    kx_send(intp->id, size, buffer);
+#endif
   else
+#ifdef USE_MESSAGE
     kz_kmfree(buffer);
+#else
+    kx_kmfree(buffer);
+#endif
 
   return 0;
 }
@@ -370,7 +402,7 @@
   return 0;
 }
 
-static void extintr_handler()
+static void extintr_handler(int signo)
 {
   int i;
   struct interrupts *intp;
@@ -380,6 +412,7 @@
       continue;
     if (intp->checkintr(intp)) {
       intp->intr(intp);
+      break;
     }
   }
   return;
@@ -396,7 +429,7 @@
 
     if (!id) {
       /* 子プロセスからの割り込み通知 */
-      extintr_handler();
+      extintr_handler(SIGHUP);
     } else {
       intp = NULL;
       switch (p[0]) {