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