Loading...
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#include <asm/switch_to.h>
13
14enum stack_type {
15 STACK_TYPE_UNKNOWN,
16 STACK_TYPE_TASK,
17 STACK_TYPE_IRQ,
18 STACK_TYPE_SOFTIRQ,
19 STACK_TYPE_ENTRY,
20 STACK_TYPE_EXCEPTION,
21 STACK_TYPE_EXCEPTION_LAST = STACK_TYPE_EXCEPTION + N_EXCEPTION_STACKS-1,
22};
23
24struct stack_info {
25 enum stack_type type;
26 unsigned long *begin, *end, *next_sp;
27};
28
29bool in_task_stack(unsigned long *stack, struct task_struct *task,
30 struct stack_info *info);
31
32bool in_entry_stack(unsigned long *stack, struct stack_info *info);
33
34int get_stack_info(unsigned long *stack, struct task_struct *task,
35 struct stack_info *info, unsigned long *visit_mask);
36
37const char *stack_type_name(enum stack_type type);
38
39static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
40{
41 void *begin = info->begin;
42 void *end = info->end;
43
44 return (info->type != STACK_TYPE_UNKNOWN &&
45 addr >= begin && addr < end &&
46 addr + len > begin && addr + len <= end);
47}
48
49#ifdef CONFIG_X86_32
50#define STACKSLOTS_PER_LINE 8
51#else
52#define STACKSLOTS_PER_LINE 4
53#endif
54
55#ifdef CONFIG_FRAME_POINTER
56static inline unsigned long *
57get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
58{
59 if (regs)
60 return (unsigned long *)regs->bp;
61
62 if (task == current)
63 return __builtin_frame_address(0);
64
65 return &((struct inactive_task_frame *)task->thread.sp)->bp;
66}
67#else
68static inline unsigned long *
69get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
70{
71 return NULL;
72}
73#endif /* CONFIG_FRAME_POINTER */
74
75static inline unsigned long *
76get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
77{
78 if (regs)
79 return (unsigned long *)kernel_stack_pointer(regs);
80
81 if (task == current)
82 return __builtin_frame_address(0);
83
84 return (unsigned long *)task->thread.sp;
85}
86
87void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
88 unsigned long *stack, char *log_lvl);
89
90/* The form of the top of the frame on the stack */
91struct stack_frame {
92 struct stack_frame *next_frame;
93 unsigned long return_address;
94};
95
96struct stack_frame_ia32 {
97 u32 next_frame;
98 u32 return_address;
99};
100
101static inline unsigned long caller_frame_pointer(void)
102{
103 struct stack_frame *frame;
104
105 frame = __builtin_frame_address(0);
106
107#ifdef CONFIG_FRAME_POINTER
108 frame = frame->next_frame;
109#endif
110
111 return (unsigned long)frame;
112}
113
114#endif /* _ASM_X86_STACKTRACE_H */
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
12extern int kstack_depth_to_print;
13
14struct thread_info;
15struct stacktrace_ops;
16
17typedef unsigned long (*walk_stack_t)(struct thread_info *tinfo,
18 unsigned long *stack,
19 unsigned long bp,
20 const struct stacktrace_ops *ops,
21 void *data,
22 unsigned long *end,
23 int *graph);
24
25extern unsigned long
26print_context_stack(struct thread_info *tinfo,
27 unsigned long *stack, unsigned long bp,
28 const struct stacktrace_ops *ops, void *data,
29 unsigned long *end, int *graph);
30
31extern unsigned long
32print_context_stack_bp(struct thread_info *tinfo,
33 unsigned long *stack, unsigned long bp,
34 const struct stacktrace_ops *ops, void *data,
35 unsigned long *end, int *graph);
36
37/* Generic stack tracer with callbacks */
38
39struct stacktrace_ops {
40 void (*address)(void *data, unsigned long address, int reliable);
41 /* On negative return stop dumping */
42 int (*stack)(void *data, char *name);
43 walk_stack_t walk_stack;
44};
45
46void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
47 unsigned long *stack, unsigned long bp,
48 const struct stacktrace_ops *ops, void *data);
49
50#ifdef CONFIG_X86_32
51#define STACKSLOTS_PER_LINE 8
52#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
53#else
54#define STACKSLOTS_PER_LINE 4
55#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
56#endif
57
58#ifdef CONFIG_FRAME_POINTER
59static inline unsigned long
60stack_frame(struct task_struct *task, struct pt_regs *regs)
61{
62 unsigned long bp;
63
64 if (regs)
65 return regs->bp;
66
67 if (task == current) {
68 /* Grab bp right from our regs */
69 get_bp(bp);
70 return bp;
71 }
72
73 /* bp is the last reg pushed by switch_to */
74 return *(unsigned long *)task->thread.sp;
75}
76#else
77static inline unsigned long
78stack_frame(struct task_struct *task, struct pt_regs *regs)
79{
80 return 0;
81}
82#endif
83
84extern void
85show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
86 unsigned long *stack, unsigned long bp, char *log_lvl);
87
88extern void
89show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
90 unsigned long *sp, unsigned long bp, 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 get_bp(frame);
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 */