Update to use Yagarto compiler and use the noinline attribute on the serial port handler function.

Demo/ARM7_AT91FR40008_GCC/atmel-ram.ld

@@ -35,6 +35,12 @@ SECTIONS
 		*(.bss)
 	} >ram
 
+	. = ALIGN(4);
+	.eh_frame :
+	{
+		 KEEP (*(.eh_frame))
+	} > ram
+	
 	/* Align here to ensure that the .bss section occupies space up to
 	_end.  Align after .bss to ensure correct alignment even if the
 	.bss section disappears because there are no input sections.  */

Demo/ARM7_AT91FR40008_GCC/atmel-rom.ld

@@ -36,6 +36,12 @@ SECTIONS
 		*(.bss)
 	} >ram
 
+	. = ALIGN(4);
+	.eh_frame :
+	{
+		 KEEP (*(.eh_frame))
+	} > ram
+	
 	/* Align here to ensure that the .bss section occupies space up to
 	_end.  Align after .bss to ensure correct alignment even if the
 	.bss section disappears because there are no input sections.  */

Demo/ARM7_AT91FR40008_GCC/serial/serialISR.c

@@ -93,7 +93,7 @@ void vUART_ISR_Wrapper( void ) __attribute__ ((naked));
 
 /* The ISR function that actually performs the work.  This must be separate 
 from the wrapper to ensure the correct stack frame is set up. */
-void vUART_ISR_Handler( void );
+void vUART_ISR_Handler( void ) __attribute__ ((noinline));
 
 /*-----------------------------------------------------------*/
 void vSerialISRCreateQueues( unsigned portBASE_TYPE uxQueueLength, xQueueHandle *pxRxedChars, xQueueHandle *pxCharsForTx )
@@ -116,7 +116,7 @@ void vUART_ISR_Wrapper( void )
 
 	/* Call the handler.  This must be a separate function to ensure the 
 	stack frame is correctly set up. */
-	vUART_ISR_Handler();
+	__asm volatile( "bl vUART_ISR_Handler" );
 
 	/* Restore the context of whichever task will run next. */
 	portRESTORE_CONTEXT();