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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_SCS_H
#define _ASM_SCS_H
#ifdef __ASSEMBLY__
#include <asm/asm-offsets.h>
#ifdef CONFIG_SHADOW_CALL_STACK
scs_sp .req x18
.macro scs_load tsk, tmp
ldr scs_sp, [\tsk, #TSK_TI_SCS_SP]
.endm
.macro scs_save tsk, tmp
str scs_sp, [\tsk, #TSK_TI_SCS_SP]
.endm
#else
.macro scs_load tsk, tmp
.endm
.macro scs_save tsk, tmp
.endm
#endif /* CONFIG_SHADOW_CALL_STACK */
#else /* __ASSEMBLY__ */
#include <linux/scs.h>
#ifdef CONFIG_SHADOW_CALL_STACK
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_overflow_check(struct task_struct *tsk) {}
#endif /* CONFIG_SHADOW_CALL_STACK */
#endif /* __ASSEMBLY __ */
#endif /* _ASM_SCS_H */
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