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
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 (*warning)(void *data, char *msg);
41 /* msg must contain %s for the symbol */
42 void (*warning_symbol)(void *data, char *msg, unsigned long symbol);
43 void (*address)(void *data, unsigned long address, int reliable);
44 /* On negative return stop dumping */
45 int (*stack)(void *data, char *name);
46 walk_stack_t walk_stack;
47};
48
49void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
50 unsigned long *stack, unsigned long bp,
51 const struct stacktrace_ops *ops, void *data);
52
53#ifdef CONFIG_X86_32
54#define STACKSLOTS_PER_LINE 8
55#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
56#else
57#define STACKSLOTS_PER_LINE 4
58#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
59#endif
60
61#ifdef CONFIG_FRAME_POINTER
62static inline unsigned long
63stack_frame(struct task_struct *task, struct pt_regs *regs)
64{
65 unsigned long bp;
66
67 if (regs)
68 return regs->bp;
69
70 if (task == current) {
71 /* Grab bp right from our regs */
72 get_bp(bp);
73 return bp;
74 }
75
76 /* bp is the last reg pushed by switch_to */
77 return *(unsigned long *)task->thread.sp;
78}
79#else
80static inline unsigned long
81stack_frame(struct task_struct *task, struct pt_regs *regs)
82{
83 return 0;
84}
85#endif
86
87extern void
88show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
89 unsigned long *stack, unsigned long bp, char *log_lvl);
90
91extern void
92show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
93 unsigned long *sp, unsigned long bp, char *log_lvl);
94
95extern unsigned int code_bytes;
96
97/* The form of the top of the frame on the stack */
98struct stack_frame {
99 struct stack_frame *next_frame;
100 unsigned long return_address;
101};
102
103struct stack_frame_ia32 {
104 u32 next_frame;
105 u32 return_address;
106};
107
108static inline unsigned long caller_frame_pointer(void)
109{
110 struct stack_frame *frame;
111
112 get_bp(frame);
113
114#ifdef CONFIG_FRAME_POINTER
115 frame = frame->next_frame;
116#endif
117
118 return (unsigned long)frame;
119}
120
121#endif /* _ASM_X86_STACKTRACE_H */