:orphan:

.. title:: ARM_STACK_PROTECTION

.. option:: CONFIG_ARM_STACK_PROTECTION

*(No prompt -- not directly user assignable.)*

Type: ``bool``

Help
====

This option enables either:
- The built-in Stack Pointer limit checking, or
- the MPU-based stack guard
to cause a system fatal error
if the bounds of the current process stack are overflowed.
The two stack guard options are mutually exclusive. The
selection of the built-in Stack Pointer limit checking is
prioritized over the MPU-based stack guard. The developer
still has the option to manually select the MPU-based
stack guard, if this is desired.

Direct dependencies
===================

!\ :option:`ARM64 <CONFIG_ARM64>` && \ :option:`ARM <CONFIG_ARM>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y if \ :option:`HW_STACK_PROTECTION <CONFIG_HW_STACK_PROTECTION>`

Symbols selected by this symbol
===============================

- \ :option:`MPU_STACK_GUARD <CONFIG_MPU_STACK_GUARD>` if !\ :option:`BUILTIN_STACK_GUARD <CONFIG_BUILTIN_STACK_GUARD>` && \ :option:`ARM_MPU <CONFIG_ARM_MPU>`

Symbols implied by this symbol
==============================

- \ :option:`BUILTIN_STACK_GUARD <CONFIG_BUILTIN_STACK_GUARD>` if \ :option:`CPU_CORTEX_M_HAS_SPLIM <CONFIG_CPU_CORTEX_M_HAS_SPLIM>`

Kconfig definition
==================

.. highlight:: kconfig

At ``arch/arm/core/aarch32/Kconfig:159``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:29`` → ``arch/Kconfig:12`` → ``arch/arm/Kconfig:42``

Menu path: (Top) → ARM Options

.. parsed-literal::

    config ARM_STACK_PROTECTION
    	bool
    	default y if \ :option:`HW_STACK_PROTECTION <CONFIG_HW_STACK_PROTECTION>`
    	select \ :option:`MPU_STACK_GUARD <CONFIG_MPU_STACK_GUARD>` if !\ :option:`BUILTIN_STACK_GUARD <CONFIG_BUILTIN_STACK_GUARD>` && \ :option:`ARM_MPU <CONFIG_ARM_MPU>`
    	imply \ :option:`BUILTIN_STACK_GUARD <CONFIG_BUILTIN_STACK_GUARD>` if \ :option:`CPU_CORTEX_M_HAS_SPLIM <CONFIG_CPU_CORTEX_M_HAS_SPLIM>`
    	depends on !\ :option:`ARM64 <CONFIG_ARM64>` && \ :option:`ARM <CONFIG_ARM>`
    	help
    	  This option enables either:
    	  - The built-in Stack Pointer limit checking, or
    	  - the MPU-based stack guard
    	  to cause a system fatal error
    	  if the bounds of the current process stack are overflowed.
    	  The two stack guard options are mutually exclusive. The
    	  selection of the built-in Stack Pointer limit checking is
    	  prioritized over the MPU-based stack guard. The developer
    	  still has the option to manually select the MPU-based
    	  stack guard, if this is desired.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*