blob: e1a93be4fd444410402f7a7b625f41e4c15a77df [file] [log] [blame]
Neil Horman878719e2008-10-23 10:40:06 -04001/*
2 * Copyright (C) 1991, 1992 Linus Torvalds
3 * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
4 */
5
6#ifndef DUMPSTACK_H
7#define DUMPSTACK_H
8
9#ifdef CONFIG_X86_32
10#define STACKSLOTS_PER_LINE 8
11#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
12#else
13#define STACKSLOTS_PER_LINE 4
14#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
15#endif
16
Frederic Weisbeckerab285f22010-04-08 14:05:50 +020017#include <linux/uaccess.h>
18
Neil Horman878719e2008-10-23 10:40:06 -040019extern void
20show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
21 unsigned long *stack, unsigned long bp, char *log_lvl);
22
23extern void
24show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
25 unsigned long *sp, unsigned long bp, char *log_lvl);
26
27extern unsigned int code_bytes;
Neil Horman878719e2008-10-23 10:40:06 -040028
29/* The form of the top of the frame on the stack */
30struct stack_frame {
31 struct stack_frame *next_frame;
32 unsigned long return_address;
33};
Frederic Weisbecker5331d7b2010-03-04 21:15:56 +010034
Torok Edwin257ef9d2010-03-17 12:07:16 +020035struct stack_frame_ia32 {
36 u32 next_frame;
37 u32 return_address;
38};
39
Frederic Weisbecker5331d7b2010-03-04 21:15:56 +010040static inline unsigned long rewind_frame_pointer(int n)
41{
42 struct stack_frame *frame;
43
44 get_bp(frame);
45
46#ifdef CONFIG_FRAME_POINTER
Frederic Weisbeckerab285f22010-04-08 14:05:50 +020047 while (n--) {
48 if (probe_kernel_address(&frame->next_frame, frame))
49 break;
50 }
Neil Horman878719e2008-10-23 10:40:06 -040051#endif
Frederic Weisbecker5331d7b2010-03-04 21:15:56 +010052
53 return (unsigned long)frame;
54}
55
56#endif /* DUMPSTACK_H */