Patch from Eric Valette <valette@crf.canon.fr> and Emmanuel Raguet

<raguet@crf.canon.fr>:

    - the dec21140 driver code has been hardened (various bug fixed) Emmanuel,
    - bug in the mcp750 init code have been fixed (interrupt stack/initial
      stack initialization), BSS correctly cleared (Eric V)
    - remote debugging over TCP/IP is nearly complete (berakpoints,
      backtrace, variables,...) (Eric V),
    - exception handling code has also been improved in order to fully
      support RDBG requirements (Eric V),

1 files changed, 25 insertions, 0 deletions

diff --git a/c/src/librdbg/src/i386/rdbg_f.c b/c/src/librdbg/src/i386/rdbg_f.c
index aeb07fcbe8..b339256e70 100644
--- a/c/src/librdbg/src/i386/rdbg_f.c
+++ b/c/src/librdbg/src/i386/rdbg_f.c
@@ -5,6 +5,8 @@
  * 
  * Synopsis  =   rdbg/i386/rdbg_f.c
  *
+ * $Id$
+ *
  **************************************************************************
  */
 
@@ -128,3 +130,26 @@ CancelSingleStep (CPU_Exception_frame* ctx)
     ctx->eflags &= ~EFLAGS_TF;
     ExitForSingleStep-- ;
 }
+
+cpuExcHandlerType old_currentExcHandler;
+extern void  rtems_exception_prologue_50();
+
+void connect_rdbg_exception()
+{
+  interrupt_gate_descriptor	 *currentIdtEntry;
+  unsigned			 limit;
+  unsigned			 level;
+
+  /*
+   *  Connect the Exception used to debug
+   */
+  i386_get_info_from_IDTR (&currentIdtEntry, &limit);
+  
+  _CPU_ISR_Disable(level);
+  create_interrupt_gate_descriptor (&currentIdtEntry[50], rtems_exception_prologue_50);
+  _CPU_ISR_Enable(level);
+
+  old_currentExcHandler = _currentExcHandler;
+  _currentExcHandler = BreakPointExcHdl ;
+
+}