Update to MIT licensed FreeRTOS V10.0.0 - see https://www.freertos.org/History.txt
diff --git a/FreeRTOS/Source/include/stack_macros.h b/FreeRTOS/Source/include/stack_macros.h
new file mode 100644
index 0000000..3add7d1
--- /dev/null
+++ b/FreeRTOS/Source/include/stack_macros.h
@@ -0,0 +1,130 @@
+/*
+ * FreeRTOS Kernel V10.0.0
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software. If you wish to use our Amazon
+ * FreeRTOS name, please do so in a fair use way that does not cause confusion.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+#ifndef STACK_MACROS_H
+#define STACK_MACROS_H
+
+/*
+ * Call the stack overflow hook function if the stack of the task being swapped
+ * out is currently overflowed, or looks like it might have overflowed in the
+ * past.
+ *
+ * Setting configCHECK_FOR_STACK_OVERFLOW to 1 will cause the macro to check
+ * the current stack state only - comparing the current top of stack value to
+ * the stack limit. Setting configCHECK_FOR_STACK_OVERFLOW to greater than 1
+ * will also cause the last few stack bytes to be checked to ensure the value
+ * to which the bytes were set when the task was created have not been
+ * overwritten. Note this second test does not guarantee that an overflowed
+ * stack will always be recognised.
+ */
+
+/*-----------------------------------------------------------*/
+
+#if( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH < 0 ) )
+
+ /* Only the current stack state is to be checked. */
+ #define taskCHECK_FOR_STACK_OVERFLOW() \
+ { \
+ /* Is the currently saved stack pointer within the stack limit? */ \
+ if( pxCurrentTCB->pxTopOfStack <= pxCurrentTCB->pxStack ) \
+ { \
+ vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
+ } \
+ }
+
+#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */
+/*-----------------------------------------------------------*/
+
+#if( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH > 0 ) )
+
+ /* Only the current stack state is to be checked. */
+ #define taskCHECK_FOR_STACK_OVERFLOW() \
+ { \
+ \
+ /* Is the currently saved stack pointer within the stack limit? */ \
+ if( pxCurrentTCB->pxTopOfStack >= pxCurrentTCB->pxEndOfStack ) \
+ { \
+ vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
+ } \
+ }
+
+#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */
+/*-----------------------------------------------------------*/
+
+#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH < 0 ) )
+
+ #define taskCHECK_FOR_STACK_OVERFLOW() \
+ { \
+ const uint32_t * const pulStack = ( uint32_t * ) pxCurrentTCB->pxStack; \
+ const uint32_t ulCheckValue = ( uint32_t ) 0xa5a5a5a5; \
+ \
+ if( ( pulStack[ 0 ] != ulCheckValue ) || \
+ ( pulStack[ 1 ] != ulCheckValue ) || \
+ ( pulStack[ 2 ] != ulCheckValue ) || \
+ ( pulStack[ 3 ] != ulCheckValue ) ) \
+ { \
+ vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
+ } \
+ }
+
+#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
+/*-----------------------------------------------------------*/
+
+#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH > 0 ) )
+
+ #define taskCHECK_FOR_STACK_OVERFLOW() \
+ { \
+ int8_t *pcEndOfStack = ( int8_t * ) pxCurrentTCB->pxEndOfStack; \
+ static const uint8_t ucExpectedStackBytes[] = { tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
+ tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
+ tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
+ tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, \
+ tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE }; \
+ \
+ \
+ pcEndOfStack -= sizeof( ucExpectedStackBytes ); \
+ \
+ /* Has the extremity of the task stack ever been written over? */ \
+ if( memcmp( ( void * ) pcEndOfStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 ) \
+ { \
+ vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
+ } \
+ }
+
+#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
+/*-----------------------------------------------------------*/
+
+/* Remove stack overflow macro if not being used. */
+#ifndef taskCHECK_FOR_STACK_OVERFLOW
+ #define taskCHECK_FOR_STACK_OVERFLOW()
+#endif
+
+
+
+#endif /* STACK_MACROS_H */
+
