Zephyr API Documentation
4.0.0-rc2
A Scalable Open Source RTOS
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error.h
Go to the documentation of this file.
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/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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* Copyright (c) 2023 Arm Limited
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_ARCH_ARM_ERROR_H_
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#define ZEPHYR_INCLUDE_ARCH_ARM_ERROR_H_
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#include <
zephyr/arch/arm/syscall.h
>
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#include <
zephyr/arch/arm/exception.h
>
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#include <
stdbool.h
>
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#ifdef __cplusplus
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extern
"C"
{
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#endif
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#if defined(CONFIG_CPU_CORTEX_M)
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/* ARMv6 will hard-fault if SVC is called with interrupts locked. Just
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* force them unlocked, the thread is in an undefined state anyway
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*
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* On ARMv7m we won't get a HardFault, but if interrupts were locked the
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* thread will continue executing after the exception and forbid PendSV to
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* schedule a new thread until they are unlocked which is not what we want.
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* Force them unlocked as well.
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*/
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#define ARCH_EXCEPT(reason_p) \
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do {\
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arch_irq_unlock(0); \
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__asm__ volatile( \
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"mov r0, %[_reason]\n" \
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"svc %[id]\n" \
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:: [_reason] "r" (reason_p), [id] "i" (_SVC_CALL_RUNTIME_EXCEPT) \
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: "r0", "memory"); \
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} while (false)
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#elif defined(CONFIG_ARMV7_R) || defined(CONFIG_AARCH32_ARMV8_R) \
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|| defined(CONFIG_ARMV7_A)
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/*
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* In order to support using svc for an exception while running in an
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* isr, stack $lr_svc before calling svc. While exiting the isr,
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* z_check_stack_sentinel is called. $lr_svc contains the return address.
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* If the sentinel is wrong, it calls svc to cause an oops. This svc
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* call will overwrite $lr_svc, losing the return address from the
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* z_check_stack_sentinel call if it is not stacked before the svc.
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*/
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#define ARCH_EXCEPT(reason_p) \
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register uint32_t r0 __asm__("r0") = reason_p; \
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do { \
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__asm__ volatile ( \
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"push {lr}\n\t" \
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"cpsie i\n\t" \
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"svc %[id]\n\t" \
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"pop {lr}\n\t" \
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: \
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: "r" (r0), [id] "i" (_SVC_CALL_RUNTIME_EXCEPT) \
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: "memory"); \
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} while (false)
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#else
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#error Unknown ARM architecture
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#endif
/* CONFIG_ARMV6_M_ARMV8_M_BASELINE */
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#ifdef __cplusplus
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}
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#endif
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#endif
/* ZEPHYR_INCLUDE_ARCH_ARM_ERROR_H_ */
syscall.h
ARM AArch32 specific syscall header.
exception.h
ARM AArch32 public exception handling.
stdbool.h
zephyr
arch
arm
error.h
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