| /* 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 */ |
