1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 4 * Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
 5 */
 6
 7#include <linux/kallsyms.h>
 8#include <linux/kernel.h>
 9#include <linux/module.h>
10#include <linux/sched.h>
11#include <linux/sched/debug.h>
12#include <linux/sched/task_stack.h>
13
14#include <asm/sysrq.h>
15#include <asm/stacktrace.h>
16#include <os.h>
 
 
 
 
 
 
 
17
18static void _print_addr(void *data, unsigned long address, int reliable)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
19{
20	const char *loglvl = data;
21
22	printk("%s [<%08lx>] %s%pS\n", loglvl, address, reliable ? "" : "? ",
23		(void *)address);
24}
 
25
26static const struct stacktrace_ops stackops = {
27	.address = _print_addr
28};
29
30void show_stack(struct task_struct *task, unsigned long *stack,
31		       const char *loglvl)
 
32{
33	struct pt_regs *segv_regs = current->thread.segv_regs;
34	int i;
35
36	if (!segv_regs && os_is_signal_stack()) {
37		pr_err("Received SIGSEGV in SIGSEGV handler,"
38				" aborting stack trace!\n");
39		return;
 
 
40	}
41
42	if (!stack)
43		stack = get_stack_pointer(task, segv_regs);
44
45	printk("%sStack:\n", loglvl);
46	for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) {
47		if (kstack_end(stack))
48			break;
49		if (i && ((i % STACKSLOTS_PER_LINE) == 0))
50			pr_cont("\n");
51		pr_cont(" %08lx", READ_ONCE_NOCHECK(*stack));
52		stack++;
53	}
54
55	printk("%sCall Trace:\n", loglvl);
56	dump_trace(current, &stackops, (void *)loglvl);
57}

 
 1/*
 2 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 3 * Licensed under the GPL
 4 */
 5
 6#include <linux/kallsyms.h>
 7#include <linux/kernel.h>
 8#include <linux/module.h>
 9#include <linux/sched.h>
10#include "sysrq.h"
 
11
12/* Catch non-i386 SUBARCH's. */
13#if !defined(CONFIG_UML_X86) || defined(CONFIG_64BIT)
14void show_trace(struct task_struct *task, unsigned long * stack)
15{
16	unsigned long addr;
17
18	if (!stack) {
19		stack = (unsigned long*) &stack;
20		WARN_ON(1);
21	}
22
23	printk(KERN_INFO "Call Trace: \n");
24	while (((long) stack & (THREAD_SIZE-1)) != 0) {
25		addr = *stack;
26		if (__kernel_text_address(addr)) {
27			printk(KERN_INFO "%08lx:  [<%08lx>]",
28			       (unsigned long) stack, addr);
29			print_symbol(KERN_CONT " %s", addr);
30			printk(KERN_CONT "\n");
31		}
32		stack++;
33	}
34	printk(KERN_INFO "\n");
35}
36#endif
37
38/*
39 * stack dumps generator - this is used by arch-independent code.
40 * And this is identical to i386 currently.
41 */
42void dump_stack(void)
43{
44	unsigned long stack;
45
46	show_trace(current, &stack);
 
47}
48EXPORT_SYMBOL(dump_stack);
49
50/*Stolen from arch/i386/kernel/traps.c */
51static const int kstack_depth_to_print = 24;
 
52
53/* This recently started being used in arch-independent code too, as in
54 * kernel/sched.c.*/
55void show_stack(struct task_struct *task, unsigned long *esp)
56{
57	unsigned long *stack;
58	int i;
59
60	if (esp == NULL) {
61		if (task != current && task != NULL) {
62			esp = (unsigned long *) KSTK_ESP(task);
63		} else {
64			esp = (unsigned long *) &esp;
65		}
66	}
67
68	stack = esp;
69	for (i = 0; i < kstack_depth_to_print; i++) {
 
 
 
70		if (kstack_end(stack))
71			break;
72		if (i && ((i % 8) == 0))
73			printk(KERN_INFO "       ");
74		printk(KERN_CONT "%08lx ", *stack++);
 
75	}
76
77	show_trace(task, esp);
 
78}