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 static unsigned long kstack_depth_to_print = 24;
27 static int __init kstack_setup(char *s)
29 return !strict_strtoul(s, 0, &kstack_depth_to_print);
31 __setup("kstack=", kstack_setup);
33 void show_trace(struct task_struct *task, unsigned long *stack)
38 stack = (unsigned long *)&stack;
40 printk(KERN_NOTICE "Call Trace: ");
41 #ifdef CONFIG_KALLSYMS
42 printk(KERN_NOTICE "\n");
44 while (!kstack_end(stack)) {
47 * If the address is either in the text segment of the
48 * kernel, or in the region which contains vmalloc'ed
49 * memory, it *may* be the address of a calling
50 * routine; if so, print it so that someone tracing
51 * down the cause of the crash will be able to figure
52 * out the call path that was taken.
54 if (kernel_text_address(addr))
57 printk(KERN_NOTICE "\n");
62 debug_show_held_locks(task);
65 void show_stack(struct task_struct *task, unsigned long *sp)
72 sp = (unsigned long *) ((struct thread_info *)
73 (task->stack))->cpu_context.r1;
75 sp = (unsigned long *)&sp;
80 printk(KERN_INFO "\nStack:\n ");
82 for (i = 0; i < kstack_depth_to_print; i++) {
85 if (i && ((i % 8) == 0))
87 printk("%08lx ", *sp++);
90 show_trace(task, stack);
95 show_stack(NULL, NULL);
97 EXPORT_SYMBOL(dump_stack);
100 void __bug(const char *file, int line, void *data)
103 printk(KERN_CRIT "kernel BUG at %s:%d (data = %p)!\n",
106 printk(KERN_CRIT "kernel BUG at %s:%d!\n", file, line);
111 int bad_trap(int trap_num, struct pt_regs *regs)
114 "unimplemented trap %d called at 0x%08lx, pid %d!\n",
115 trap_num, regs->pc, current->pid);
119 int debug_trap(struct pt_regs *regs)
122 printk(KERN_CRIT "debug trap\n");
123 for (i = 0; i < 32; i++) {
124 /* printk("r%i:%08X\t",i,regs->gpr[i]); */
126 printk(KERN_CRIT "\n");
128 printk(KERN_CRIT "pc:%08lX\tmsr:%08lX\n", regs->pc, regs->msr);