Update to use the latest Yagarto and change the C handler part of the interrupt routines to use the noinline attribute.

Demo/ARM7_AT91SAM7X256_Eclipse/RTOSDemo/Makefile

@@ -105,7 +105,8 @@ THUMB_SOURCE= \
 		$(RTOS_SOURCE_DIR)/tasks.c \
 		$(RTOS_SOURCE_DIR)/portable/GCC/ARM7_AT91SAM7S/port.c \
 		$(RTOS_SOURCE_DIR)/portable/MemMang/heap_2.c \
-		./USB/USBSample.c
+		./USB/USBSample.c \
+		syscalls.c
 
 ARM_SOURCE= \
 		$(RTOS_SOURCE_DIR)/portable/GCC/ARM7_AT91SAM7S/portISR.c \

Demo/ARM7_AT91SAM7X256_Eclipse/RTOSDemo/USB/USB_ISR.c

@@ -83,7 +83,7 @@ void vUSB_ISR_Wrapper( void ) __attribute__((naked));
  * Actual ISR handler.  This must be separate from the entry point as the stack
  * is used.
  */
-void vUSB_ISR_Handler( void );
+void vUSB_ISR_Handler( void ) __attribute__((noinline));
 
 /*-----------------------------------------------------------*/
 
@@ -182,7 +182,7 @@ void vUSB_ISR_Wrapper( void )
 
 	/* Call the handler itself.  This must be a separate function as it uses
 	the stack. */
-	vUSB_ISR_Handler();
+	__asm volatile ("bl vUSB_ISR_Handler");
 
 	/* Restore the context of the task that is going to 
 	execute next. This might not be the same as the originally 

Demo/ARM7_AT91SAM7X256_Eclipse/RTOSDemo/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_AT91SAM7X256_Eclipse/RTOSDemo/syscalls.c

@@ -0,0 +1,162 @@
+/****************************************************************************
+*  Copyright (c) 2009 by Michael Fischer. All rights reserved.
+*
+*  Redistribution and use in source and binary forms, with or without 
+*  modification, are permitted provided that the following conditions 
+*  are met:
+*  
+*  1. Redistributions of source code must retain the above copyright 
+*     notice, this list of conditions and the following disclaimer.
+*  2. Redistributions in binary form must reproduce the above copyright
+*     notice, this list of conditions and the following disclaimer in the 
+*     documentation and/or other materials provided with the distribution.
+*  3. Neither the name of the author nor the names of its contributors may 
+*     be used to endorse or promote products derived from this software 
+*     without specific prior written permission.
+*
+*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+*  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+*  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
+*  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
+*  THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
+*  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
+*  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 
+*  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
+*  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
+*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
+*  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+*  SUCH DAMAGE.
+*
+****************************************************************************
+*  History:
+*
+*  28.03.09  mifi   First Version, based on the original syscall.c from
+*                   newlib version 1.17.0
+****************************************************************************/
+
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+/***************************************************************************/
+
+int _read_r (struct _reent *r, int file, char * ptr, int len)
+{
+  r = r;
+  file = file;
+  ptr = ptr;
+  len = len;
+  
+  errno = EINVAL;
+  return -1;
+}
+
+/***************************************************************************/
+
+int _lseek_r (struct _reent *r, int file, int ptr, int dir)
+{
+  r = r;
+  file = file;
+  ptr = ptr;
+  dir = dir;
+  
+  return 0;
+}
+
+/***************************************************************************/
+
+int _write_r (struct _reent *r, int file, char * ptr, int len)
+{  
+  r = r;
+  file = file;
+  ptr = ptr;
+
+#if 0
+  int index;
+  
+  /* For example, output string by UART */
+  for(index=0; index<len; index++)
+  {
+    if (ptr[index] == '\n')
+    {
+      uart_putc('\r');
+    }  
+
+    uart_putc(ptr[index]);
+  }  
+#endif   
+  
+  return len;
+}
+
+/***************************************************************************/
+
+int _close_r (struct _reent *r, int file)
+{
+  return 0;
+}
+
+/***************************************************************************/
+
+/* Register name faking - works in collusion with the linker.  */
+register char * stack_ptr asm ("sp");
+
+caddr_t _sbrk_r (struct _reent *r, int incr)
+{
+  extern char   end asm ("end"); /* Defined by the linker.  */
+  static char * heap_end;
+  char *        prev_heap_end;
+
+  if (heap_end == NULL)
+    heap_end = & end;
+  
+  prev_heap_end = heap_end;
+  
+  if (heap_end + incr > stack_ptr)
+  {
+      /* Some of the libstdc++-v3 tests rely upon detecting
+        out of memory errors, so do not abort here.  */
+#if 0
+      extern void abort (void);
+
+      _write (1, "_sbrk: Heap and stack collision\n", 32);
+      
+      abort ();
+#else
+      errno = ENOMEM;
+      return (caddr_t) -1;
+#endif
+  }
+  
+  heap_end += incr;
+
+  return (caddr_t) prev_heap_end;
+}
+
+/***************************************************************************/
+
+int _fstat_r (struct _reent *r, int file, struct stat * st)
+{
+  r = r; 
+  file = file;
+   
+  memset (st, 0, sizeof (* st));
+  st->st_mode = S_IFCHR;
+  return 0;
+}
+
+/***************************************************************************/
+
+int _isatty_r(struct _reent *r, int fd)
+{
+  r = r;
+  fd = fd;
+   
+  return 1;
+}
+
+/*** EOF ***/
+
+

Demo/ARM7_AT91SAM7X256_Eclipse/RTOSDemo/webserver/EMAC_ISR.c

@@ -54,7 +54,7 @@ void vEMACISR_Wrapper( void ) __attribute__((naked));
 
 /* Handler called by the ISR wrapper.  This must be kept a separate
 function to ensure the stack frame is correctly set up. */
-void vEMACISR_Handler( void );
+void vEMACISR_Handler( void ) __attribute__((noinline));
 
 static xSemaphoreHandle xEMACSemaphore;
 
@@ -103,7 +103,7 @@ void vEMACISR_Wrapper( void )
 	
 	/* Call the handler task to do the actual work.  This must be a separate
 	function to ensure the stack frame is correctly set up. */
-	vEMACISR_Handler();
+	__asm volatile ("bl vEMACISR_Handler");
 	
 	/* Restore the context of whichever task is the next to run. */
 	portRESTORE_CONTEXT();