Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
5 */
6
7#ifndef _ASM_X86_STACKTRACE_H
8#define _ASM_X86_STACKTRACE_H
9
10#include <linux/uaccess.h>
11#include <linux/ptrace.h>
12
13#include <asm/cpu_entry_area.h>
14#include <asm/switch_to.h>
15
16enum stack_type {
17 STACK_TYPE_UNKNOWN,
18 STACK_TYPE_TASK,
19 STACK_TYPE_IRQ,
20 STACK_TYPE_SOFTIRQ,
21 STACK_TYPE_ENTRY,
22 STACK_TYPE_EXCEPTION,
23 STACK_TYPE_EXCEPTION_LAST = STACK_TYPE_EXCEPTION + N_EXCEPTION_STACKS-1,
24};
25
26struct stack_info {
27 enum stack_type type;
28 unsigned long *begin, *end, *next_sp;
29};
30
31bool in_task_stack(unsigned long *stack, struct task_struct *task,
32 struct stack_info *info);
33
34bool in_entry_stack(unsigned long *stack, struct stack_info *info);
35
36int get_stack_info(unsigned long *stack, struct task_struct *task,
37 struct stack_info *info, unsigned long *visit_mask);
38
39const char *stack_type_name(enum stack_type type);
40
41static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
42{
43 void *begin = info->begin;
44 void *end = info->end;
45
46 return (info->type != STACK_TYPE_UNKNOWN &&
47 addr >= begin && addr < end &&
48 addr + len > begin && addr + len <= end);
49}
50
51#ifdef CONFIG_X86_32
52#define STACKSLOTS_PER_LINE 8
53#else
54#define STACKSLOTS_PER_LINE 4
55#endif
56
57#ifdef CONFIG_FRAME_POINTER
58static inline unsigned long *
59get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
60{
61 if (regs)
62 return (unsigned long *)regs->bp;
63
64 if (task == current)
65 return __builtin_frame_address(0);
66
67 return &((struct inactive_task_frame *)task->thread.sp)->bp;
68}
69#else
70static inline unsigned long *
71get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
72{
73 return NULL;
74}
75#endif /* CONFIG_FRAME_POINTER */
76
77static inline unsigned long *
78get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
79{
80 if (regs)
81 return (unsigned long *)kernel_stack_pointer(regs);
82
83 if (task == current)
84 return __builtin_frame_address(0);
85
86 return (unsigned long *)task->thread.sp;
87}
88
89void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
90 unsigned long *stack, char *log_lvl);
91
92/* The form of the top of the frame on the stack */
93struct stack_frame {
94 struct stack_frame *next_frame;
95 unsigned long return_address;
96};
97
98struct stack_frame_ia32 {
99 u32 next_frame;
100 u32 return_address;
101};
102
103void show_opcodes(struct pt_regs *regs, const char *loglvl);
104void show_ip(struct pt_regs *regs, const char *loglvl);
105#endif /* _ASM_X86_STACKTRACE_H */