Tell the linker to assume a defualt fill value of 0xFF for the Flash.

startup/stm32f030.ld

@@ -56,13 +56,13 @@ SECTIONS
 		KEEP(*(.init))	   /* Constructors */
 		KEEP(*(.fini))     /* Destructors  */
 		. = ALIGN(4);
-	} >FLASH
+	} >FLASH =0xFF
 	
 	.ARM.extab : ALIGN(4)
 	{ 
 		*(.ARM.extab* .gnu.linkonce.armextab.*)
 		. = ALIGN(4);
-	} >FLASH
+	} >FLASH =0xFF
 	
 	.ARM : ALIGN(4)
 	{
@@ -70,7 +70,7 @@ SECTIONS
       		*(.ARM.exidx*)
       		__exidx_end = .;
       		. = ALIGN(4);
-   	} >FLASH
+   	} >FLASH =0xFF
 	
 	/* Constructor/Destructor tables */
  	.preinit_array : ALIGN(4)
@@ -79,7 +79,7 @@ SECTIONS
     		KEEP (*(.preinit_array*))
     		PROVIDE_HIDDEN (__preinit_array_end = .);
 		. = ALIGN(4);
-  	} >FLASH
+  	} >FLASH =0xFF
   	
 	.init_array : ALIGN(4)
   	{
@@ -88,7 +88,7 @@ SECTIONS
     		KEEP (*(.init_array*))
     		PROVIDE_HIDDEN (__init_array_end = .);
 		. = ALIGN(4);
-  	} >FLASH
+  	} >FLASH =0xFF
   
 	.fini_array : ALIGN(4)
 	{
@@ -97,7 +97,7 @@ SECTIONS
     		KEEP (*(SORT(.fini_array.*)))
     		PROVIDE_HIDDEN (__fini_array_end = .);
 		. = ALIGN(4);
-  	} >FLASH
+  	} >FLASH =0xFF
 	
 	/* Initialized Data */
 	__ld_load_data = LOADADDR(.data);