arch/arm: cortex_m: Disable DWT based null-pointer exception detection

Null-pointer exception detection using DWT is currently incompatible with current openocd runner default implementation that leaves debug mode on by default. As a consequence, on all targets that use openocd runner, null-pointer exception detection using DWT will generated an assert. As a consequence, all tests are failing on such platforms. Disable this until openocd behavior is fixed (#32984) and enable the MPU based solution for now. Signed-off-by: Erwan Gouriou <[email protected]>
zephyrproject-rtos · Mar 9, 2021 · 1931451 · 1931451
1 parent afbc044
commit 1931451
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/arch/arm/core/aarch32/cortex_m/Kconfig b/arch/arm/core/aarch32/cortex_m/Kconfig
@@ -310,7 +310,8 @@ endmenu
 
 choice CORTEX_M_DEBUG_NULL_POINTER_EXCEPTION_DETECTION
 	bool "Enable and use null-pointer exception"
-	default CORTEX_M_DEBUG_NULL_POINTER_EXCEPTION_DETECTION_DWT if TEST_ARM_CORTEX_M && !ARM_NONSECURE_FIRMWARE && CPU_CORTEX_M_HAS_DWT
+	# Disable this until https://github.com/zephyrproject-rtos/zephyr/issues/32984 is fixed
+	# default CORTEX_M_DEBUG_NULL_POINTER_EXCEPTION_DETECTION_DWT if TEST_ARM_CORTEX_M && !ARM_NONSECURE_FIRMWARE && CPU_CORTEX_M_HAS_DWT
 	default CORTEX_M_DEBUG_NULL_POINTER_EXCEPTION_DETECTION_MPU if TEST_ARM_CORTEX_M && !ARM_NONSECURE_FIRMWARE && ARM_MPU && !CPU_CORTEX_M_HAS_DWT
 	default CORTEX_M_DEBUG_NULL_POINTER_EXCEPTION_DETECTION_NONE
 	help