fix _rt_scheduler_stack_check

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@47 bbd45198-f89e-11dd-88c7-29a3b14d5316

src/scheduler.c

@@ -18,6 +18,7 @@
  * 2006-08-03     Bernard      add hook support
  * 2006-09-05     Bernard      add 32 priority level support
  * 2006-09-24     Bernard      add rt_system_scheduler_start function
+ * 2009-09-16     Bernard      fix _rt_scheduler_stack_check
  */
 
 #include <rtthread.h>
@@ -95,7 +96,9 @@ static void _rt_scheduler_stack_check(struct rt_thread* thread)
 {
     RT_ASSERT(thread != RT_NULL);
 
-	if ((rt_uint32_t)thread->sp <= (rt_uint32_t)thread->stack_addr)
+    if ( (rt_uint32_t)thread->sp <= (rt_uint32_t)thread->stack_addr ||
+            (rt_uint32_t)thread->sp >
+            (rt_uint32_t)thread->stack_addr + (rt_uint32_t)thread->stack_size )
     {
         rt_uint32_t level;
 
@@ -213,7 +216,7 @@ void rt_schedule()
     level = rt_hw_interrupt_disable();
 
     /* check the scheduler is enabled or not */
-	if(rt_scheduler_lock_nest == 0)
+    if (rt_scheduler_lock_nest == 0)
     {
         /* find out the highest priority task */
         if (rt_thread_ready_priority_group & 0xff)