1/*
2 * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include "linux/sched.h"
7#include "linux/kernel.h"
8#include "linux/module.h"
9#include "linux/kallsyms.h"
10#include "asm/page.h"
11#include "asm/processor.h"
12#include "sysrq.h"
13
14/* Catch non-i386 SUBARCH's. */
15#if !defined(CONFIG_UML_X86) || defined(CONFIG_64BIT)
16void show_trace(struct task_struct *task, unsigned long * stack)
17{
18        unsigned long addr;
19
20        if (!stack) {
21		stack = (unsigned long*) &stack;
22		WARN_ON(1);
23	}
24
25        printk("Call Trace: \n");
26        while (((long) stack & (THREAD_SIZE-1)) != 0) {
27                addr = *stack;
28		if (__kernel_text_address(addr)) {
29			printk("%08lx:  [<%08lx>]", (unsigned long) stack, addr);
30			print_symbol(" %s", addr);
31			printk("\n");
32                }
33                stack++;
34        }
35        printk("\n");
36}
37#endif
38
39/*
40 * stack dumps generator - this is used by arch-independent code.
41 * And this is identical to i386 currently.
42 */
43void dump_stack(void)
44{
45	unsigned long stack;
46
47	show_trace(current, &stack);
48}
49EXPORT_SYMBOL(dump_stack);
50
51/*Stolen from arch/i386/kernel/traps.c */
52static const int kstack_depth_to_print = 24;
53
54/* This recently started being used in arch-independent code too, as in
55 * kernel/sched.c.*/
56void show_stack(struct task_struct *task, unsigned long *esp)
57{
58	unsigned long *stack;
59	int i;
60
61	if (esp == NULL) {
62		if (task != current && task != NULL) {
63			esp = (unsigned long *) KSTK_ESP(task);
64		} else {
65			esp = (unsigned long *) &esp;
66		}
67	}
68
69	stack = esp;
70	for(i = 0; i < kstack_depth_to_print; i++) {
71		if (kstack_end(stack))
72			break;
73		if (i && ((i % 8) == 0))
74			printk("\n       ");
75		printk("%08lx ", *stack++);
76	}
77
78	printk("Call Trace: \n");
79	show_trace(task, esp);
80}
81