175 lines
4.0 KiB
C
175 lines
4.0 KiB
C
/*
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* linux/arch/h8300/boot/traps.c -- general exception handling code
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* H8/300 support Yoshinori Sato <ysato@users.sourceforge.jp>
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*
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* Cloned from Linux/m68k.
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*
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* No original Copyright holder listed,
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* Probable original (C) Roman Zippel (assigned DJD, 1999)
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*
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* Copyright 1999-2000 D. Jeff Dionne, <jeff@rt-control.com>
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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/types.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/bug.h>
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#include <asm/system.h>
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#include <asm/irq.h>
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#include <asm/traps.h>
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#include <asm/page.h>
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static DEFINE_SPINLOCK(die_lock);
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/*
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* this must be called very early as the kernel might
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* use some instruction that are emulated on the 060
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*/
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void __init base_trap_init(void)
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{
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}
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void __init trap_init (void)
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{
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}
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asmlinkage void set_esp0 (unsigned long ssp)
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{
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current->thread.esp0 = ssp;
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}
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/*
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* Generic dumping code. Used for panic and debug.
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*/
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static void dump(struct pt_regs *fp)
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{
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unsigned long *sp;
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unsigned char *tp;
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int i;
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printk("\nCURRENT PROCESS:\n\n");
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printk("COMM=%s PID=%d\n", current->comm, current->pid);
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if (current->mm) {
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printk("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
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(int) current->mm->start_code,
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(int) current->mm->end_code,
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(int) current->mm->start_data,
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(int) current->mm->end_data,
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(int) current->mm->end_data,
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(int) current->mm->brk);
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printk("USER-STACK=%08x KERNEL-STACK=%08lx\n\n",
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(int) current->mm->start_stack,
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(int) PAGE_SIZE+(unsigned long)current);
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}
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show_regs(fp);
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printk("\nCODE:");
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tp = ((unsigned char *) fp->pc) - 0x20;
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for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) {
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if ((i % 0x10) == 0)
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printk("\n%08x: ", (int) (tp + i));
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printk("%08x ", (int) *sp++);
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}
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printk("\n");
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printk("\nKERNEL STACK:");
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tp = ((unsigned char *) fp) - 0x40;
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for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
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if ((i % 0x10) == 0)
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printk("\n%08x: ", (int) (tp + i));
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printk("%08x ", (int) *sp++);
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}
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printk("\n");
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if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE))
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printk("(Possibly corrupted stack page??)\n");
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printk("\n\n");
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}
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void die(char *str, struct pt_regs *fp, unsigned long err)
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{
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static int diecount;
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oops_enter();
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console_verbose();
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spin_lock_irq(&die_lock);
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report_bug(fp->pc, fp);
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printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++diecount);
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dump(fp);
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spin_unlock_irq(&die_lock);
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do_exit(SIGSEGV);
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}
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extern char _start, _etext;
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#define check_kernel_text(addr) \
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((addr >= (unsigned long)(&_start)) && \
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(addr < (unsigned long)(&_etext)))
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static int kstack_depth_to_print = 24;
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void show_stack(struct task_struct *task, unsigned long *esp)
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{
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unsigned long *stack, addr;
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int i;
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if (esp == NULL)
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esp = (unsigned long *) &esp;
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stack = esp;
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printk("Stack from %08lx:", (unsigned long)stack);
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for (i = 0; i < kstack_depth_to_print; i++) {
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if (((unsigned long)stack & (THREAD_SIZE - 1)) == 0)
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break;
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if (i % 8 == 0)
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printk("\n ");
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printk(" %08lx", *stack++);
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}
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printk("\nCall Trace:");
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i = 0;
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stack = esp;
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while (((unsigned long)stack & (THREAD_SIZE - 1)) != 0) {
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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 (check_kernel_text(addr)) {
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if (i % 4 == 0)
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printk("\n ");
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printk(" [<%08lx>]", addr);
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i++;
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}
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}
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printk("\n");
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}
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void show_trace_task(struct task_struct *tsk)
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{
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show_stack(tsk,(unsigned long *)tsk->thread.esp0);
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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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