1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _ASM_X86_SHSTK_H |
3 | #define _ASM_X86_SHSTK_H |
4 | |
5 | #ifndef __ASSEMBLY__ |
6 | #include <linux/types.h> |
7 | |
8 | struct task_struct; |
9 | struct ksignal; |
10 | |
11 | #ifdef CONFIG_X86_USER_SHADOW_STACK |
12 | struct thread_shstk { |
13 | u64 base; |
14 | u64 size; |
15 | }; |
16 | |
17 | long shstk_prctl(struct task_struct *task, int option, unsigned long arg2); |
18 | void reset_thread_features(void); |
19 | unsigned long shstk_alloc_thread_stack(struct task_struct *p, unsigned long clone_flags, |
20 | unsigned long stack_size); |
21 | void shstk_free(struct task_struct *p); |
22 | int setup_signal_shadow_stack(struct ksignal *ksig); |
23 | int restore_signal_shadow_stack(void); |
24 | #else |
25 | static inline long shstk_prctl(struct task_struct *task, int option, |
26 | unsigned long arg2) { return -EINVAL; } |
27 | static inline void reset_thread_features(void) {} |
28 | static inline unsigned long shstk_alloc_thread_stack(struct task_struct *p, |
29 | unsigned long clone_flags, |
30 | unsigned long stack_size) { return 0; } |
31 | static inline void shstk_free(struct task_struct *p) {} |
32 | static inline int setup_signal_shadow_stack(struct ksignal *ksig) { return 0; } |
33 | static inline int restore_signal_shadow_stack(void) { return 0; } |
34 | #endif /* CONFIG_X86_USER_SHADOW_STACK */ |
35 | |
36 | #endif /* __ASSEMBLY__ */ |
37 | |
38 | #endif /* _ASM_X86_SHSTK_H */ |
39 | |