4a41f42e73
This commit implements the build-in interrupt stack protection via the native MSPLIM register in ARMv8-M MCUs that support the Main Extension. Main stack pointer overflows will cause Stack Overflow UsageFaults. In addition, the commit introduces a new config option, BUILTIN_STACK_GUARD, allowing the user to enable and use the built-in stack protection in ARMv8-M firmware. Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
/*
|
|
* Copyright (c) 2013-2014 Wind River Systems, Inc.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Stack helpers for Cortex-M CPUs
|
|
*
|
|
* Stack helper functions.
|
|
*/
|
|
|
|
#ifndef _ARM_CORTEXM_STACK__H_
|
|
#define _ARM_CORTEXM_STACK__H_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#ifdef _ASMLANGUAGE
|
|
|
|
/* nothing */
|
|
|
|
#else
|
|
|
|
#include "arch/arm/cortex_m/cmsis.h"
|
|
|
|
extern K_THREAD_STACK_DEFINE(_interrupt_stack, CONFIG_ISR_STACK_SIZE);
|
|
|
|
/**
|
|
*
|
|
* @brief Setup interrupt stack
|
|
*
|
|
* On Cortex-M, the interrupt stack is registered in the MSP (main stack
|
|
* pointer) register, and switched to automatically when taking an exception.
|
|
*
|
|
* @return N/A
|
|
*/
|
|
static ALWAYS_INLINE void _InterruptStackSetup(void)
|
|
{
|
|
#ifdef CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
|
|
u32_t msp = (u32_t)(K_THREAD_STACK_BUFFER(_interrupt_stack) +
|
|
CONFIG_ISR_STACK_SIZE - MPU_GUARD_ALIGN_AND_SIZE);
|
|
#else
|
|
u32_t msp = (u32_t)(K_THREAD_STACK_BUFFER(_interrupt_stack) +
|
|
CONFIG_ISR_STACK_SIZE);
|
|
#endif
|
|
|
|
__set_MSP(msp);
|
|
#if defined(CONFIG_BUILTIN_STACK_GUARD)
|
|
#if defined(CONFIG_CPU_CORTEX_M_HAS_SPLIM)
|
|
__set_MSPLIM((u32_t)_interrupt_stack);
|
|
#else
|
|
#error "Built-in MSP limit checks not supported by HW"
|
|
#endif
|
|
#endif /* CONFIG_BUILTIN_STACK_GUARD */
|
|
}
|
|
|
|
#endif /* _ASMLANGUAGE */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _ARM_CORTEXM_STACK__H_ */
|