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

    Here is a patch that enables to catch exception
    and get message before crashing RTEMS :)

    It should be generic to any Intel port although enabled
    only for pc386 BSP...

    [Joel] I fixed the bug I introduced in irq_asm.s...

6 files changed, 41 insertions, 18 deletions

diff --git a/c/src/lib/libbsp/i386/pc386/Makefile.in b/c/src/lib/libbsp/i386/pc386/Makefile.in
index 4862454e13..f30692edfc 100644
--- a/c/src/lib/libbsp/i386/pc386/Makefile.in
+++ b/c/src/lib/libbsp/i386/pc386/Makefile.in
@@ -11,9 +11,9 @@ PROJECT_ROOT = @PROJECT_ROOT@
 include $(RTEMS_ROOT)/make/custom/$(RTEMS_BSP).cfg
 include $(RTEMS_ROOT)/make/directory.cfg
 
-# We only build the Network library if HAS_NETWORKING was defined
-NETWORK_yes_V = network
-NETWORK = $(NETWORK_$(HAS_NETWORKING)_V)
+# # We only build the Network library if HAS_NETWORKING was defined
+# NETWORK_yes_V = network
+# NETWORK = $(NETWORK_$(HAS_NETWORKING)_V)
 
 # wrapup is the one that actually builds and installs the library
 #  from the individual .rel files built in other directories
diff --git a/c/src/lib/libbsp/i386/pc386/start/start16.s b/c/src/lib/libbsp/i386/pc386/start/start16.s
index c10a658718..778c0dd597 100644
--- a/c/src/lib/libbsp/i386/pc386/start/start16.s
+++ b/c/src/lib/libbsp/i386/pc386/start/start16.s
@@ -33,7 +33,7 @@
 .set HDROFF,        0x24	# offset into bin2boot header of start32 addr
 .set STACKOFF,      0x200-0x10  # offset to load into %esp, from start of image
 
-
+/* #define NEW_GAS*/
 /*----------------------------------------------------------------------------+
 | CODE section
 +----------------------------------------------------------------------------*/
@@ -78,14 +78,20 @@ _start16:
 	/*---------------------------------------------------------------------+
 	| Bare PC machines boot in real mode! We have to turn protected mode on.
 	+---------------------------------------------------------------------*/
-
+#ifdef NEW_GAS
+	data32
+	addr32
+#endif	
 	lgdt	gdtptr - start16	# load Global Descriptor Table
-	
 	movl	%cr0, %eax
 	orl	$CR0_PE, %eax
 	movl	%eax, %cr0		# turn on protected mode
 	
+#ifdef NEW_GAS
+	ljmpl	$PROT_CODE_SEG, $1f	# flush prefetch queue, and reload %cs
+#else
 	ljmp	$PROT_CODE_SEG, $1f	# flush prefetch queue, and reload %cs
+#endif	
 1:
 
 .code32
diff --git a/c/src/lib/libbsp/i386/pc386/startup/bspstart.c b/c/src/lib/libbsp/i386/pc386/startup/bspstart.c
index 13e8610c42..7ebcc60685 100644
--- a/c/src/lib/libbsp/i386/pc386/startup/bspstart.c
+++ b/c/src/lib/libbsp/i386/pc386/startup/bspstart.c
@@ -173,10 +173,13 @@ void bsp_start( void )
   console_reserve_resources(&BSP_Configuration);
 
   /*
-   * Init rtems_interrupt_management
+   * Init rtems interrupt management
    */
   rtems_irq_mngt_init();
-  
+  /*
+   * Init rtems exceptions management
+   */
+  rtems_exception_init_mngt();
   /*
    *  The following information is very useful when debugging.
    */
diff --git a/c/src/lib/libbsp/i386/pc386/wrapup/Makefile.in b/c/src/lib/libbsp/i386/pc386/wrapup/Makefile.in
index 70515fdb8e..c8672490d7 100644
--- a/c/src/lib/libbsp/i386/pc386/wrapup/Makefile.in
+++ b/c/src/lib/libbsp/i386/pc386/wrapup/Makefile.in
@@ -8,9 +8,9 @@ VPATH = @srcdir@
 RTEMS_ROOT = @top_srcdir@
 PROJECT_ROOT = @PROJECT_ROOT@
 
-# We only build the Network library if HAS_NETWORKING was defined
-NETWORK_yes_V = network
-NETWORK = $(NETWORK_$(HAS_NETWORKING)_V)
+# # We only build the Network library if HAS_NETWORKING was defined
+# NETWORK_yes_V = network
+# NETWORK = $(NETWORK_$(HAS_NETWORKING)_V)
 
 BSP_PIECES=startup clock console timer pc386dev $(NETWORK) 
 GENERIC_PIECES=
diff --git a/c/src/lib/libbsp/i386/shared/irq/irq.c b/c/src/lib/libbsp/i386/shared/irq/irq.c
index 356112076f..9dea372e0f 100644
--- a/c/src/lib/libbsp/i386/shared/irq/irq.c
+++ b/c/src/lib/libbsp/i386/shared/irq/irq.c
@@ -14,7 +14,9 @@
 
 #include <bsp.h>
 #include <irq.h>
-  
+#include <rtems/score/thread.h>
+#include <rtems/score/apiext.h>
+
 /*
  * pointer to the mask representing the additionnal irq vectors
  * that must be disabled when a particular entry is activated.
@@ -360,11 +362,18 @@ int pc386_rtems_irq_mngt_get(rtems_irq_global_settings** config)
 void _ThreadProcessSignalsFromIrq (CPU_Exception_frame* ctx)
 {
   /*
-   * If I understand the _Thread_Dispatch routine correctly
-   * I do not see how this routine can be called given the
-   * actual code. I plan to use this so far unused feature
-   * to implement remote debugger ptrace("attach", ...)
-   * command.
+   * Process pending signals that have not already been
+   * processed by _Thread_Displatch. This happens quite
+   * unfrequently : the ISR must have posted an action
+   * to the current running thread.
+   */
+  if ( _Thread_Do_post_task_switch_extension ||
+       _Thread_Executing->do_post_task_switch_extension ) {
+    _Thread_Executing->do_post_task_switch_extension = FALSE;
+    _API_extensions_Run_postswitch();
+  }
+  /*
+   * I plan to process other thread related events here.
+   * This will include DEBUG session requsted from keyboard...
    */
-  printk(" _ThreadProcessSignalsFromIrq called! mail valette@crf.canon.fr\n");
 }
diff --git a/c/src/lib/libbsp/i386/shared/irq/irq_asm.s b/c/src/lib/libbsp/i386/shared/irq/irq_asm.s
index a3954d0961..4be08ed992 100644
--- a/c/src/lib/libbsp/i386/shared/irq/irq_asm.s
+++ b/c/src/lib/libbsp/i386/shared/irq/irq_asm.s
@@ -14,6 +14,8 @@
 #include "asm.h"	
 #include <irq_asm.h>
 
+	       BEGIN_CODE
+	
 SYM (_ISR_Handler):	
        /*
         *  Before this was point is reached the vectors unique
@@ -243,3 +245,6 @@ SYM (default_raw_idt_handler):
 	popa
 	iret
 	
+END_CODE
+
+END