Linux kernel mirror (for testing)
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linux
1/*
2 * Copyright (C) 1991, 1992 Linus Torvalds
3 * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
4 */
5
6#ifndef _ASM_X86_STACKTRACE_H
7#define _ASM_X86_STACKTRACE_H
8
9#include <linux/uaccess.h>
10#include <linux/ptrace.h>
11#include <asm/switch_to.h>
12
13enum stack_type {
14 STACK_TYPE_UNKNOWN,
15 STACK_TYPE_TASK,
16 STACK_TYPE_IRQ,
17 STACK_TYPE_SOFTIRQ,
18 STACK_TYPE_EXCEPTION,
19 STACK_TYPE_EXCEPTION_LAST = STACK_TYPE_EXCEPTION + N_EXCEPTION_STACKS-1,
20};
21
22struct stack_info {
23 enum stack_type type;
24 unsigned long *begin, *end, *next_sp;
25};
26
27bool in_task_stack(unsigned long *stack, struct task_struct *task,
28 struct stack_info *info);
29
30int get_stack_info(unsigned long *stack, struct task_struct *task,
31 struct stack_info *info, unsigned long *visit_mask);
32
33void stack_type_str(enum stack_type type, const char **begin,
34 const char **end);
35
36static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
37{
38 void *begin = info->begin;
39 void *end = info->end;
40
41 return (info->type != STACK_TYPE_UNKNOWN &&
42 addr >= begin && addr < end &&
43 addr + len > begin && addr + len <= end);
44}
45
46extern int kstack_depth_to_print;
47
48#ifdef CONFIG_X86_32
49#define STACKSLOTS_PER_LINE 8
50#else
51#define STACKSLOTS_PER_LINE 4
52#endif
53
54#ifdef CONFIG_FRAME_POINTER
55static inline unsigned long *
56get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
57{
58 if (regs)
59 return (unsigned long *)regs->bp;
60
61 if (task == current)
62 return __builtin_frame_address(0);
63
64 return (unsigned long *)((struct inactive_task_frame *)task->thread.sp)->bp;
65}
66#else
67static inline unsigned long *
68get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
69{
70 return NULL;
71}
72#endif /* CONFIG_FRAME_POINTER */
73
74static inline unsigned long *
75get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
76{
77 if (regs)
78 return (unsigned long *)kernel_stack_pointer(regs);
79
80 if (task == current)
81 return __builtin_frame_address(0);
82
83 return (unsigned long *)task->thread.sp;
84}
85
86void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
87 unsigned long *stack, char *log_lvl);
88
89void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
90 unsigned long *sp, char *log_lvl);
91
92extern unsigned int code_bytes;
93
94/* The form of the top of the frame on the stack */
95struct stack_frame {
96 struct stack_frame *next_frame;
97 unsigned long return_address;
98};
99
100struct stack_frame_ia32 {
101 u32 next_frame;
102 u32 return_address;
103};
104
105static inline unsigned long caller_frame_pointer(void)
106{
107 struct stack_frame *frame;
108
109 frame = __builtin_frame_address(0);
110
111#ifdef CONFIG_FRAME_POINTER
112 frame = frame->next_frame;
113#endif
114
115 return (unsigned long)frame;
116}
117
118#endif /* _ASM_X86_STACKTRACE_H */