--- a/ppe/Sys.cc	Mon Apr 12 00:32:34 2010 +0900
+++ b/ppe/Sys.cc	Mon Apr 12 23:58:19 2010 +0900
@@ -67,13 +67,23 @@
 
 }
 
+void*
+get_addr(void *buff, int size)
+{
+
+  char* p;
+  p = (char*)buff;
+  p = p + size;
+
+  return p;
+
+}
+
 void
 fix_type(task_t *task, void *buff)
 {
 
-  char *p;
-  p = (char*)buff;
-  p = p + sizeof(task_head_t);
+  void *p = get_addr(buff, sizeof(task_head_t));
 
   task->head = (task_head_t*)buff;
   task->input = p;
@@ -84,7 +94,7 @@
 task_allocate(int in_size, int out_size)
 {
 
-  if (in_size % 16) {
+  if (in_size % 16 || in_size + sizeof(task_head_t) > MAX_DMA_SIZE ) {
     printf("allocate in_size is not multiple of 16\n");
   }