/*
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2007-2009 PetaLogix
* Copyright (C) 2006 Atmark Techno, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/kallsyms.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/debug_locks.h>
#include <asm/exceptions.h>
#include <asm/system.h>
void trap_init(void)
{
__enable_hw_exceptions();
}
static int kstack_depth_to_print = 24;
static int __init kstack_setup(char *s)
{
kstack_depth_to_print = strict_strtoul(s, 0, NULL);
return 1;
}
__setup("kstack=", kstack_setup);
void show_trace(struct task_struct *task, unsigned long *stack)
{
unsigned long addr;
if (!stack)
stack = (unsigned long *)&stack;
printk(KERN_NOTICE "Call Trace: ");
#ifdef CONFIG_KALLSYMS
printk(KERN_NOTICE "\n");
#endif
while (!kstack_end(stack)) {
addr = *stack++;
/*
* If the address is either in the text segment of the
* kernel, or in the region which contains vmalloc'ed
* memory, it *may* be the address of a calling
* routine; if so, print it so that someone tracing
* down the cause of the crash will be able to figure
* out the call path that was taken.
*/
if (kernel_text_address(addr))
print_ip_sym(addr);
}
printk(KERN_NOTICE "\n");
if (!task)
task = current;
debug_show_held_locks(task);
}
void show_stack(struct task_struct *task, unsigned long *sp)
{
unsigned long *stack;
int i;
if (sp == NULL) {
if (task)
sp = (unsigned long *) ((struct thread_info *)
(task->stack))->cpu_context.r1;
else
sp = (unsigned long *)&sp;
}
stack = sp;
printk(KERN_INFO "\nStack:\n ");
for (i = 0; i < kstack_depth_to_print; i++) {
if (kstack_end(sp))
break;
if (i && ((i % 8) == 0))
printk("\n ");
printk("%08lx ", *sp++);
}
printk("\n");
show_trace(task, stack);
}
void dump_stack(void)
{
show_stack(NULL, NULL);
}
EXPORT_SYMBOL(dump_stack);
#ifdef CONFIG_MMU
void __bug(const char *file, int line, void *data)
{
if (data)
printk(KERN_CRIT "kernel BUG at %s:%d (data = %p)!\n",
file, line, data);
else
printk(KERN_CRIT "kernel BUG at %s:%d!\n", file, line);
machine_halt();
}
int bad_trap(int trap_num, struct pt_regs *regs)
{
printk(KERN_CRIT
"unimplemented trap %d called at 0x%08lx, pid %d!\n",
trap_num, regs->pc, current->pid);
return -ENOSYS;
}
int debug_trap(struct pt_regs *regs)
{
int i;
printk(KERN_CRIT "debug trap\n");
for (i = 0; i < 32; i++) {
/* printk("r%i:%08X\t",i,regs->gpr[i]); */
if ((i % 4) == 3)
printk(KERN_CRIT "\n");
}
printk(KERN_CRIT "pc:%08lX\tmsr:%08lX\n", regs->pc, regs->msr);
return -ENOSYS;
}
#endif
