0ec3774bde
This functions is being called across the tree, no reason why it should not be a public API. The current usage violates a few MISRA rules. Signed-off-by: Anas Nashif <anas.nashif@intel.com>
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
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* Copyright (c) 2020 BayLibre, SAS
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief RISCV public error handling
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*
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* RISCV-specific kernel error handling interface. Included by riscv/arch.h.
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*/
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#ifndef ZEPHYR_INCLUDE_ARCH_RISCV_ERROR_H_
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#define ZEPHYR_INCLUDE_ARCH_RISCV_ERROR_H_
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#include <arch/riscv/syscall.h>
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#include <arch/riscv/exp.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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#ifdef CONFIG_USERSPACE
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/*
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* Kernel features like canary (software stack guard) are built
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* with an argument to bypass the test before syscall (test if CPU
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* is running in user or kernel) and directly execute the function.
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* Then if this kind of code wishes to trigger a CPU exception,
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* the implemented syscall is useless because the function is directly
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* called even if the CPU is running in user (which happens during
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* sanity check). To fix that, I bypass the generated test code by writing
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* the test myself to remove the bypass ability.
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*/
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#define ARCH_EXCEPT(reason_p) do { \
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if (k_is_user_context()) { \
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arch_syscall_invoke1(reason_p, \
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K_SYSCALL_USER_FAULT); \
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} else { \
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compiler_barrier(); \
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z_impl_user_fault(reason_p); \
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} \
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CODE_UNREACHABLE; /* LCOV_EXCL_LINE */ \
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} while (false)
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#else
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#define ARCH_EXCEPT(reason_p) do { \
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z_impl_user_fault(reason_p); \
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} while (false)
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#endif
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__syscall void user_fault(unsigned int reason);
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#include <syscalls/error.h>
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZEPHYR_INCLUDE_ARCH_RISCV_ERROR_H_ */
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