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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_SCS_H
#define _ASM_SCS_H
#ifdef __ASSEMBLY__
#ifdef CONFIG_SHADOW_CALL_STACK
.macro scs_load tsk, tmp
ldp x18, \tmp, [\tsk, #TSK_TI_SCS_BASE]
add x18, x18, \tmp
.endm
.macro scs_save tsk, tmp
ldr \tmp, [\tsk, #TSK_TI_SCS_BASE]
sub \tmp, x18, \tmp
str \tmp, [\tsk, #TSK_TI_SCS_OFFSET]
.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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