2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2007-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
11 #include <linux/kernel.h>
12 #include <linux/kallsyms.h>
13 #include <linux/module.h>
14 #include <linux/sched.h>
15 #include <linux/debug_locks.h>
17 #include <asm/exceptions.h>
18 #include <asm/system.h>
22 __enable_hw_exceptions();
25 void __bad_xchg(volatile void *ptr, int size)
27 printk(KERN_INFO "xchg: bad data size: pc 0x%p, ptr 0x%p, size %d\n",
28 __builtin_return_address(0), ptr, size);
31 EXPORT_SYMBOL(__bad_xchg);
33 static int kstack_depth_to_print = 24;
35 static int __init kstack_setup(char *s)
37 kstack_depth_to_print = strict_strtoul(s, 0, 0);
41 __setup("kstack=", kstack_setup);
43 void show_trace(struct task_struct *task, unsigned long *stack)
48 stack = (unsigned long *)&stack;
50 printk(KERN_NOTICE "Call Trace: ");
51 #ifdef CONFIG_KALLSYMS
52 printk(KERN_NOTICE "\n");
54 while (!kstack_end(stack)) {
57 * If the address is either in the text segment of the
58 * kernel, or in the region which contains vmalloc'ed
59 * memory, it *may* be the address of a calling
60 * routine; if so, print it so that someone tracing
61 * down the cause of the crash will be able to figure
62 * out the call path that was taken.
64 if (kernel_text_address(addr))
67 printk(KERN_NOTICE "\n");
72 debug_show_held_locks(task);
75 void show_stack(struct task_struct *task, unsigned long *sp)
82 sp = (unsigned long *) ((struct thread_info *)
83 (task->stack))->cpu_context.r1;
85 sp = (unsigned long *)&sp;
90 printk(KERN_INFO "\nStack:\n ");
92 for (i = 0; i < kstack_depth_to_print; i++) {
95 if (i && ((i % 8) == 0))
97 printk("%08lx ", *sp++);
100 show_trace(task, stack);
103 void dump_stack(void)
105 show_stack(NULL, NULL);
107 EXPORT_SYMBOL(dump_stack);