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b88fb1fc46
Add stack protector implementation for RISC-V architecture using a global __stack_chk_guard variable. This differs from x86 which uses per-CPU stack canaries. Tracked-On: #8834 Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com> Reviewed-by: Fei Li <fei1.li@intel.com> Acked-by: Wang, Yu1 <yu1.wang@intel.com>
33 lines
667 B
C
33 lines
667 B
C
/*
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* Copyright (C) 2023-2025 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef RISCV_SECURITY_H
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#define RISCV_SECURITY_H
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#ifdef STACK_PROTECTOR
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#include <random.h>
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#endif
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#ifdef STACK_PROTECTOR
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extern unsigned long __stack_chk_guard;
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/*
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* Initialize the stack protector __stack_chk_guard.
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*
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* NOTE: this function changes the __stack_chk_guard,
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* - It must only be called from functions that never return
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* - It must always be inlined itself
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*/
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static inline __attribute__((__always_inline__)) void init_stack_canary(void)
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{
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__stack_chk_guard = get_random_value();
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}
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#endif /* STACK_PROTECTOR */
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#endif /* RISCV_SECURITY_H */
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