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git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - arch/x86/include/asm/unwind.h
1 #ifndef _ASM_X86_UNWIND_H
2 #define _ASM_X86_UNWIND_H
4 #include <linux/sched.h>
5 #include <linux/ftrace.h>
6 #include <asm/ptrace.h>
7 #include <asm/stacktrace.h>
10 struct stack_info stack_info
;
11 unsigned long stack_mask
;
12 struct task_struct
*task
;
15 #if defined(CONFIG_ORC_UNWINDER)
16 bool signal
, full_regs
;
17 unsigned long sp
, bp
, ip
;
19 #elif defined(CONFIG_FRAME_POINTER_UNWINDER)
21 unsigned long *bp
, *orig_sp
, ip
;
28 void __unwind_start(struct unwind_state
*state
, struct task_struct
*task
,
29 struct pt_regs
*regs
, unsigned long *first_frame
);
30 bool unwind_next_frame(struct unwind_state
*state
);
31 unsigned long unwind_get_return_address(struct unwind_state
*state
);
32 unsigned long *unwind_get_return_address_ptr(struct unwind_state
*state
);
34 static inline bool unwind_done(struct unwind_state
*state
)
36 return state
->stack_info
.type
== STACK_TYPE_UNKNOWN
;
39 static inline bool unwind_error(struct unwind_state
*state
)
45 void unwind_start(struct unwind_state
*state
, struct task_struct
*task
,
46 struct pt_regs
*regs
, unsigned long *first_frame
)
48 first_frame
= first_frame
? : get_stack_pointer(task
, regs
);
50 __unwind_start(state
, task
, regs
, first_frame
);
53 #if defined(CONFIG_ORC_UNWINDER) || defined(CONFIG_FRAME_POINTER_UNWINDER)
54 static inline struct pt_regs
*unwind_get_entry_regs(struct unwind_state
*state
)
56 if (unwind_done(state
))
62 static inline struct pt_regs
*unwind_get_entry_regs(struct unwind_state
*state
)
68 #ifdef CONFIG_ORC_UNWINDER
69 void unwind_init(void);
70 void unwind_module_init(struct module
*mod
, void *orc_ip
, size_t orc_ip_size
,
71 void *orc
, size_t orc_size
);
73 static inline void unwind_init(void) {}
75 void unwind_module_init(struct module
*mod
, void *orc_ip
, size_t orc_ip_size
,
76 void *orc
, size_t orc_size
) {}
80 * This disables KASAN checking when reading a value from another task's stack,
81 * since the other task could be running on another CPU and could have poisoned
82 * the stack in the meantime.
84 #define READ_ONCE_TASK_STACK(task, x) \
87 if (task == current) \
90 val = READ_ONCE_NOCHECK(x); \
94 static inline bool task_on_another_cpu(struct task_struct
*task
)
97 return task
!= current
&& task
->on_cpu
;
103 #endif /* _ASM_X86_UNWIND_H */