134 lines
2.7 KiB
C
134 lines
2.7 KiB
C
/*
|
|
* 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
|