43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_SHSTK_H
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#define _ASM_X86_SHSTK_H
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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struct task_struct;
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struct ksignal;
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#ifdef CONFIG_X86_USER_SHADOW_STACK
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struct thread_shstk {
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u64 base;
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u64 size;
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};
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long shstk_prctl(struct task_struct *task, int option, unsigned long arg2);
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void reset_thread_features(void);
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unsigned long shstk_alloc_thread_stack(struct task_struct *p, unsigned long clone_flags,
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unsigned long stack_size);
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void shstk_free(struct task_struct *p);
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int setup_signal_shadow_stack(struct ksignal *ksig);
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int restore_signal_shadow_stack(void);
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int shstk_update_last_frame(unsigned long val);
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bool shstk_is_enabled(void);
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#else
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static inline long shstk_prctl(struct task_struct *task, int option,
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unsigned long arg2) { return -EINVAL; }
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static inline void reset_thread_features(void) {}
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static inline unsigned long shstk_alloc_thread_stack(struct task_struct *p,
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unsigned long clone_flags,
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unsigned long stack_size) { return 0; }
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static inline void shstk_free(struct task_struct *p) {}
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static inline int setup_signal_shadow_stack(struct ksignal *ksig) { return 0; }
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static inline int restore_signal_shadow_stack(void) { return 0; }
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static inline int shstk_update_last_frame(unsigned long val) { return 0; }
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static inline bool shstk_is_enabled(void) { return false; }
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#endif /* CONFIG_X86_USER_SHADOW_STACK */
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_SHSTK_H */
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