Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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
33const char *stack_type_name(enum stack_type type);
34
35static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
36{
37 void *begin = info->begin;
38 void *end = info->end;
39
40 return (info->type != STACK_TYPE_UNKNOWN &&
41 addr >= begin && addr < end &&
42 addr + len > begin && addr + len <= end);
43}
44
45#ifdef CONFIG_X86_32
46#define STACKSLOTS_PER_LINE 8
47#else
48#define STACKSLOTS_PER_LINE 4
49#endif
50
51#ifdef CONFIG_FRAME_POINTER
52static inline unsigned long *
53get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
54{
55 if (regs)
56 return (unsigned long *)regs->bp;
57
58 if (task == current)
59 return __builtin_frame_address(0);
60
61 return &((struct inactive_task_frame *)task->thread.sp)->bp;
62}
63#else
64static inline unsigned long *
65get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
66{
67 return NULL;
68}
69#endif /* CONFIG_FRAME_POINTER */
70
71static inline unsigned long *
72get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
73{
74 if (regs)
75 return (unsigned long *)kernel_stack_pointer(regs);
76
77 if (task == current)
78 return __builtin_frame_address(0);
79
80 return (unsigned long *)task->thread.sp;
81}
82
83void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
84 unsigned long *stack, char *log_lvl);
85
86extern unsigned int code_bytes;
87
88/* The form of the top of the frame on the stack */
89struct stack_frame {
90 struct stack_frame *next_frame;
91 unsigned long return_address;
92};
93
94struct stack_frame_ia32 {
95 u32 next_frame;
96 u32 return_address;
97};
98
99static inline unsigned long caller_frame_pointer(void)
100{
101 struct stack_frame *frame;
102
103 frame = __builtin_frame_address(0);
104
105#ifdef CONFIG_FRAME_POINTER
106 frame = frame->next_frame;
107#endif
108
109 return (unsigned long)frame;
110}
111
112#endif /* _ASM_X86_STACKTRACE_H */