git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2032 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/ports/GCC/ARMCMx/chcore_v7m.h

@@ -92,7 +92,8 @@ struct intctx {
  *          the idle thread should take no more space than those reserved
  *          by @p INT_REQUIRED_STACK.
  * @note    In this port it is set to 4 because the idle thread does have
- *          a stack frame when compiling without optimizations.
+ *          a stack frame when compiling without optimizations. You may
+ *          reduce this value to zero when compiling with optimizations.
  */
 #ifndef IDLE_THREAD_STACK_SIZE
 #define IDLE_THREAD_STACK_SIZE      4
@@ -105,10 +106,11 @@ struct intctx {
  *          This value can be zero on those architecture where there is a
  *          separate interrupt stack and the stack space between @p intctx and
  *          @p extctx is known to be zero.
- * @note    This port requires no extra stack space for interrupt handling.
+ * @note    In this port it is set to 8 because the function
+ *          @p chSchDoRescheduleI() has a stack frame.
  */
 #ifndef INT_REQUIRED_STACK
-#define INT_REQUIRED_STACK          0
+#define INT_REQUIRED_STACK          8
 #endif
 
 /**

readme.txt

@@ -59,6 +59,8 @@
 *****************************************************************************
 
 *** 2.1.0 ***
+- FIX: Fixed insufficient stack space assigned to the idle thread in
+  Cortex-M3 port (bug 3019594)(backported in 2.0.1).
 - FIX: Fixed missing check in chIQReadTimeout() and chIQWriteTimeout() (bug
   3019158)(backported in 2.0.1).
 - FIX: Fixed instability in Mutexes subsystem (bug 3019099)(backported