38 lines
791 B
C
38 lines
791 B
C
|
/* 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 */
|