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a28547576b
Like others, replace the custom stack canary initialization with the
get_random_canary() helper, following the pattern established in commit
622754e84b ("stackprotector: actually use get_random_canary()").
Signed-off-by: Luo Qiu <luoqiu@kylinsec.com.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
32 lines
872 B
C
32 lines
872 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* GCC stack protector support.
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*
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* Stack protector works by putting predefined pattern at the start of
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* the stack frame and verifying that it hasn't been overwritten when
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* returning from the function. The pattern is called stack canary and
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* on LoongArch gcc expects it to be defined by a global variable called
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* "__stack_chk_guard".
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*/
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#ifndef _ASM_STACKPROTECTOR_H
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#define _ASM_STACKPROTECTOR_H
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extern unsigned long __stack_chk_guard;
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/*
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* Initialize the stackprotector canary value.
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*
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* NOTE: this must only be called from functions that never return,
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* and it must always be inlined.
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*/
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static __always_inline void boot_init_stack_canary(void)
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{
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unsigned long canary = get_random_canary();
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current->stack_canary = canary;
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__stack_chk_guard = current->stack_canary;
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}
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#endif /* _ASM_STACKPROTECTOR_H */
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