Update flop.c and FreeRTOS.h to include a macro (and a default null implementation of the macro) that enables the flop tasks to register their need for a floating point context with the kernel.

FreeRTOS/Demo/Common/Minimal/flop.c

@@ -132,6 +132,11 @@ volatile unsigned short *pusTaskCheckVariable;
 volatile portDOUBLE dAnswer;
 short sError = pdFALSE;
 
+	/* Some ports require that tasks that use a hardware floating point unit
+	tell the kernel that they require a floating point context before any
+	floating point instructions are executed. */
+	portTASK_USES_FLOATING_POINT();
+
 	d1 = 123.4567;
 	d2 = 2345.6789;
 	d3 = -918.222;
@@ -184,6 +189,11 @@ volatile unsigned short *pusTaskCheckVariable;
 volatile portDOUBLE dAnswer;
 short sError = pdFALSE;
 
+	/* Some ports require that tasks that use a hardware floating point unit
+	tell the kernel that they require a floating point context before any
+	floating point instructions are executed. */
+	portTASK_USES_FLOATING_POINT();
+
 	d1 = -389.38;
 	d2 = 32498.2;
 	d3 = -2.0001;
@@ -238,6 +248,11 @@ const size_t xArraySize = 10;
 size_t xPosition;
 short sError = pdFALSE;
 
+	/* Some ports require that tasks that use a hardware floating point unit
+	tell the kernel that they require a floating point context before any
+	floating point instructions are executed. */
+	portTASK_USES_FLOATING_POINT();
+
 	/* The variable this task increments to show it is still running is passed in 
 	as the parameter. */
 	pusTaskCheckVariable = ( unsigned short * ) pvParameters;
@@ -295,6 +310,11 @@ const size_t xArraySize = 10;
 size_t xPosition;
 short sError = pdFALSE;
 
+	/* Some ports require that tasks that use a hardware floating point unit
+	tell the kernel that they require a floating point context before any
+	floating point instructions are executed. */
+	portTASK_USES_FLOATING_POINT();
+
 	/* The variable this task increments to show it is still running is passed in 
 	as the parameter. */
 	pusTaskCheckVariable = ( unsigned short * ) pvParameters;

FreeRTOS/Source/include/FreeRTOS.h

@@ -568,6 +568,10 @@ typedef portBASE_TYPE (*pdTASK_HOOK_CODE)( void * );
 	#define configUSE_QUEUE_SETS 0
 #endif
 
+#ifndef portTASK_USES_FLOATING_POINT
+	#define portTASK_USES_FLOATING_POINT()
+#endif
+
 /* For backward compatability. */
 #define eTaskStateGet eTaskGetState