Patch from Eric Valette <valette@crf.canon.fr>:

    Eric> NB : there is still a bug on PC386 serial line : exit does not
    Eric> flush the remaining output queue. As this is not a bug in the
    Eric> driver itself but somewhere in PC386 initialization/termios
    Eric> relationship it will be part of another patch.

    Eric> NB2 : As Emmanuel excerced the exception hanlder code, while
    Eric> porting the SMC driver to the new BSD stack, we found a bug
    Eric> in the exception handler : it shall not delete the current
    Eric> thread in case we are running at interrupt level. This will
    Eric> be part of another patch...

    So here is the patch. This patch fixes the two problems mentionned above

    + it use vpath mechanism intead of copying the irq related files in
      the right directory.  This avoid to compile them each time and is
      more homogenous with other Makefiles.

1 files changed, 17 insertions, 6 deletions

diff --git a/c/src/exec/score/cpu/i386/cpu.c b/c/src/exec/score/cpu/i386/cpu.c
index 1f0900fceb..90473bdb14 100644
--- a/c/src/exec/score/cpu/i386/cpu.c
+++ b/c/src/exec/score/cpu/i386/cpu.c
@@ -104,12 +104,23 @@ void _defaultExcHandler (CPU_Exception_frame *ctx)
   printk("Error code pushed by processor itself (if not 0) = %x\n",
 	 ctx->faultCode);
   printk("----------------------------------------------------------\n\n");
-  printk(" ************ FAULTY THREAD WILL BE DELETED **************\n");
-  /*
-   * OK I could probably use a simplified version but at least this
-   * should work.
-   */
-  rtems_task_delete(_Thread_Executing->Object.id);
+  if (_ISR_Nest_level > 0) {
+    /*
+     * In this case we shall not delete the task interrupted as
+     * it has nothing to do with the fault. We cannot return either
+     * because the eip points to the faulty instruction so...
+     */
+    printk("Exception while executing ISR!!!. System locked\n");
+    while(1);
+  }
+  else {
+    /*
+     * OK I could probably use a simplified version but at least this
+     * should work.
+     */
+    printk(" ************ FAULTY THREAD WILL BE DELETED **************\n");
+    rtems_task_delete(_Thread_Executing->Object.id);
+  }
 }
 
 cpuExcHandlerType _currentExcHandler = _defaultExcHandler;