Add get top and limit functions for Spresense

Author: kamtom480

ports/cxd56/Makefile

@@ -90,6 +90,7 @@ INC += \
 	-I$(SPRESENSE_SDK)/nuttx/include \
 	-I$(SPRESENSE_SDK)/nuttx/arch \
 	-I$(SPRESENSE_SDK)/nuttx/arch/chip \
+	-I$(SPRESENSE_SDK)/nuttx/arch/os \
 	-I$(SPRESENSE_SDK)/sdk/bsp/include \
 	-I$(SPRESENSE_SDK)/sdk/bsp/include/sdk \
 
@@ -124,7 +125,6 @@ LDFLAGS = \
 	--entry=__start \
 	-nostartfiles \
 	-nodefaultlibs \
-	--defsym __stack=_vectors+786432 \
 	-T$(SPRESENSE_SDK)/nuttx/build/ramconfig.ld \
 	--gc-sections \
 	-Map=$(BUILD)/output.map \

ports/cxd56/supervisor/port.c

@@ -27,6 +27,8 @@
 #include <stdint.h>
 #include <sys/boardctl.h>
 
+#include "sched/sched.h"
+
 #include "boards/board.h"
 
 #include "supervisor/port.h"
@@ -68,11 +70,15 @@ void reset_to_bootloader(void) {
 }
 
 uint32_t *port_stack_get_limit(void) {
-    return &_ebss;
+    struct tcb_s *rtcb = this_task();
+
+    return rtcb->adj_stack_ptr - (uint32_t)rtcb->adj_stack_size;
 }
 
 uint32_t *port_stack_get_top(void) {
-    return &_estack;
+    struct tcb_s *rtcb = this_task();
+
+    return rtcb->adj_stack_ptr;
 }
 
 extern uint32_t _ebss;