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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);
38bool get_stack_info_noinstr(unsigned long *stack, struct task_struct *task,
39 struct stack_info *info);
40
41static __always_inline
42bool get_stack_guard_info(unsigned long *stack, struct stack_info *info)
43{
44 /* make sure it's not in the stack proper */
45 if (get_stack_info_noinstr(stack, current, info))
46 return false;
47 /* but if it is in the page below it, we hit a guard */
48 return get_stack_info_noinstr((void *)stack + PAGE_SIZE, current, info);
49}
50
51const char *stack_type_name(enum stack_type type);
52
53static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
54{
55 void *begin = info->begin;
56 void *end = info->end;
57
58 return (info->type != STACK_TYPE_UNKNOWN &&
59 addr >= begin && addr < end &&
60 addr + len > begin && addr + len <= end);
61}
62
63#ifdef CONFIG_X86_32
64#define STACKSLOTS_PER_LINE 8
65#else
66#define STACKSLOTS_PER_LINE 4
67#endif
68
69#ifdef CONFIG_FRAME_POINTER
70static inline unsigned long *
71get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
72{
73 if (regs)
74 return (unsigned long *)regs->bp;
75
76 if (task == current)
77 return __builtin_frame_address(0);
78
79 return &((struct inactive_task_frame *)task->thread.sp)->bp;
80}
81#else
82static inline unsigned long *
83get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
84{
85 return NULL;
86}
87#endif /* CONFIG_FRAME_POINTER */
88
89static inline unsigned long *
90get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
91{
92 if (regs)
93 return (unsigned long *)regs->sp;
94
95 if (task == current)
96 return __builtin_frame_address(0);
97
98 return (unsigned long *)task->thread.sp;
99}
100
101/* The form of the top of the frame on the stack */
102struct stack_frame {
103 struct stack_frame *next_frame;
104 unsigned long return_address;
105};
106
107struct stack_frame_ia32 {
108 u32 next_frame;
109 u32 return_address;
110};
111
112void show_opcodes(struct pt_regs *regs, const char *loglvl);
113void show_ip(struct pt_regs *regs, const char *loglvl);
114#endif /* _ASM_X86_STACKTRACE_H */
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 */