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