1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
7 #ifndef _ASM_X86_STACKTRACE_H
8 #define _ASM_X86_STACKTRACE_H
10 #include <linux/uaccess.h>
11 #include <linux/ptrace.h>
12 #include <asm/switch_to.h>
20 STACK_TYPE_EXCEPTION_LAST
= STACK_TYPE_EXCEPTION
+ N_EXCEPTION_STACKS
-1,
25 unsigned long *begin
, *end
, *next_sp
;
28 bool in_task_stack(unsigned long *stack
, struct task_struct
*task
,
29 struct stack_info
*info
);
31 int get_stack_info(unsigned long *stack
, struct task_struct
*task
,
32 struct stack_info
*info
, unsigned long *visit_mask
);
34 const char *stack_type_name(enum stack_type type
);
36 static inline bool on_stack(struct stack_info
*info
, void *addr
, size_t len
)
38 void *begin
= info
->begin
;
39 void *end
= info
->end
;
41 return (info
->type
!= STACK_TYPE_UNKNOWN
&&
42 addr
>= begin
&& addr
< end
&&
43 addr
+ len
> begin
&& addr
+ len
<= end
);
47 #define STACKSLOTS_PER_LINE 8
49 #define STACKSLOTS_PER_LINE 4
52 #ifdef CONFIG_FRAME_POINTER
53 static inline unsigned long *
54 get_frame_pointer(struct task_struct
*task
, struct pt_regs
*regs
)
57 return (unsigned long *)regs
->bp
;
60 return __builtin_frame_address(0);
62 return &((struct inactive_task_frame
*)task
->thread
.sp
)->bp
;
65 static inline unsigned long *
66 get_frame_pointer(struct task_struct
*task
, struct pt_regs
*regs
)
70 #endif /* CONFIG_FRAME_POINTER */
72 static inline unsigned long *
73 get_stack_pointer(struct task_struct
*task
, struct pt_regs
*regs
)
76 return (unsigned long *)kernel_stack_pointer(regs
);
79 return __builtin_frame_address(0);
81 return (unsigned long *)task
->thread
.sp
;
84 void show_trace_log_lvl(struct task_struct
*task
, struct pt_regs
*regs
,
85 unsigned long *stack
, char *log_lvl
);
87 extern unsigned int code_bytes
;
89 /* The form of the top of the frame on the stack */
91 struct stack_frame
*next_frame
;
92 unsigned long return_address
;
95 struct stack_frame_ia32
{
100 static inline unsigned long caller_frame_pointer(void)
102 struct stack_frame
*frame
;
104 frame
= __builtin_frame_address(0);
106 #ifdef CONFIG_FRAME_POINTER
107 frame
= frame
->next_frame
;
110 return (unsigned long)frame
;
113 #endif /* _ASM_X86_STACKTRACE_H */