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38 lines
791 B
38 lines
791 B
7 years ago
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_SCS_H
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#define _ASM_SCS_H
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#ifndef __ASSEMBLY__
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#include <linux/scs.h>
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#ifdef CONFIG_SHADOW_CALL_STACK
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extern void scs_init_irq(void);
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static __always_inline void scs_save(struct task_struct *tsk)
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{
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void *s;
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asm volatile("mov %0, x18" : "=r" (s));
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task_set_scs(tsk, s);
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}
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static inline void scs_overflow_check(struct task_struct *tsk)
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{
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if (unlikely(scs_corrupted(tsk)))
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panic("corrupted shadow stack detected inside scheduler\n");
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}
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#else /* CONFIG_SHADOW_CALL_STACK */
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static inline void scs_init_irq(void) {}
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static inline void scs_save(struct task_struct *tsk) {}
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static inline void scs_overflow_check(struct task_struct *tsk) {}
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#endif /* CONFIG_SHADOW_CALL_STACK */
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#endif /* __ASSEMBLY __ */
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#endif /* _ASM_SCS_H */
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