arch/openrisc/kernel/traps.c - arm/linux-arm-legacy - Git at Google

 /*
  * OpenRISC traps.c
  *
  * Linux architectural port borrowing liberally from similar works of
  * others.  All original copyrights apply as per the original source
  * declaration.
  *
  * Modifications for the OpenRISC architecture:
  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  *
  *      This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
  *      as published by the Free Software Foundation; either version
  *      2 of the License, or (at your option) any later version.
  *
  *  Here we handle the break vectors not used by the system call
  *  mechanism, as well as some general stack/register dumping
  *  things.
  *
  */

 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/kmod.h>
 #include <linux/string.h>
 #include <linux/errno.h>
 #include <linux/ptrace.h>
 #include <linux/timer.h>
 #include <linux/mm.h>
 #include <linux/kallsyms.h>
 #include <asm/uaccess.h>

 #include <asm/segment.h>
 #include <asm/io.h>
 #include <asm/pgtable.h>

 extern char _etext, _stext;

 int kstack_depth_to_print = 0x180;

 static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
 {
 	return p > (void *)tinfo && p < (void *)tinfo + THREAD_SIZE - 3;
 }

 void show_trace(struct task_struct *task, unsigned long *stack)
 {
 	struct thread_info *context;
 	unsigned long addr;

 	context = (struct thread_info *)
 	    ((unsigned long)stack & (~(THREAD_SIZE - 1)));

 	while (valid_stack_ptr(context, stack)) {
 		addr = *stack++;
 		if (__kernel_text_address(addr)) {
 			printk(" [<%08lx>]", addr);
 			print_symbol(" %s", addr);
 			printk("\n");
 		}
 	}
 	printk(" =======================\n");
 }

 /* displays a short stack trace */
 void show_stack(struct task_struct *task, unsigned long *esp)
 {
 	unsigned long addr, *stack;
 	int i;

 	if (esp == NULL)
 		esp = (unsigned long *)&esp;

 	stack = esp;

 	printk("Stack dump [0x%08lx]:\n", (unsigned long)esp);
 	for (i = 0; i < kstack_depth_to_print; i++) {
 		if (kstack_end(stack))
 			break;
 		if (__get_user(addr, stack)) {
 			/* This message matches "failing address" marked
 			   s390 in ksymoops, so lines containing it will
 			   not be filtered out by ksymoops.  */
 			printk("Failing address 0x%lx\n", (unsigned long)stack);
 			break;
 		}
 		stack++;

 		printk("sp + %02d: 0x%08lx\n", i * 4, addr);
 	}
 	printk("\n");

 	show_trace(task, esp);

 	return;
 }

 void show_trace_task(struct task_struct *tsk)
 {
 	/*
 	 * TODO: SysRq-T trace dump...
 	 */
 }

 void show_registers(struct pt_regs *regs)
 {
 	int i;
 	int in_kernel = 1;
 	unsigned long esp;

 	esp = (unsigned long)(&regs->sp);
 	if (user_mode(regs))
 		in_kernel = 0;

 	printk("CPU #: %d\n"
 	       "   PC: %08lx    SR: %08lx    SP: %08lx\n",
 	       smp_processor_id(), regs->pc, regs->sr, regs->sp);
 	printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
 	       0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
 	printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
 	       regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
 	printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
 	       regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
 	printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
 	       regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
 	printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
 	       regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
 	printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
 	       regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
 	printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
 	       regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
 	printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
 	       regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
 	printk("  RES: %08lx oGPR11: %08lx\n",
 	       regs->gpr[11], regs->orig_gpr11);

 	printk("Process %s (pid: %d, stackpage=%08lx)\n",
 	       current->comm, current->pid, (unsigned long)current);
 	/*
 	 * When in-kernel, we also print out the stack and code at the
 	 * time of the fault..
 	 */
 	if (in_kernel) {

 		printk("\nStack: ");
 		show_stack(NULL, (unsigned long *)esp);

 		printk("\nCode: ");
 		if (regs->pc < PAGE_OFFSET)
 			goto bad;

 		for (i = -24; i < 24; i++) {
 			unsigned char c;
 			if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
 bad:
 				printk(" Bad PC value.");
 				break;
 			}

 			if (i == 0)
 				printk("(%02x) ", c);
 			else
 				printk("%02x ", c);
 		}
 	}
 	printk("\n");
 }

 void nommu_dump_state(struct pt_regs *regs,
 		      unsigned long ea, unsigned long vector)
 {
 	int i;
 	unsigned long addr, stack = regs->sp;

 	printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);

 	printk("CPU #: %d\n"
 	       "   PC: %08lx    SR: %08lx    SP: %08lx\n",
 	       0, regs->pc, regs->sr, regs->sp);
 	printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
 	       0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
 	printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
 	       regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
 	printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
 	       regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
 	printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
 	       regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
 	printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
 	       regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
 	printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
 	       regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
 	printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
 	       regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
 	printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
 	       regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
 	printk("  RES: %08lx oGPR11: %08lx\n",
 	       regs->gpr[11], regs->orig_gpr11);

 	printk("Process %s (pid: %d, stackpage=%08lx)\n",
 	       ((struct task_struct *)(__pa(current)))->comm,
 	       ((struct task_struct *)(__pa(current)))->pid,
 	       (unsigned long)current);

 	printk("\nStack: ");
 	printk("Stack dump [0x%08lx]:\n", (unsigned long)stack);
 	for (i = 0; i < kstack_depth_to_print; i++) {
 		if (((long)stack & (THREAD_SIZE - 1)) == 0)
 			break;
 		stack++;

 		printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
 		       *((unsigned long *)(__pa(stack))));
 	}
 	printk("\n");

 	printk("Call Trace:   ");
 	i = 1;
 	while (((long)stack & (THREAD_SIZE - 1)) != 0) {
 		addr = *((unsigned long *)__pa(stack));
 		stack++;

 		if (kernel_text_address(addr)) {
 			if (i && ((i % 6) == 0))
 				printk("\n ");
 			printk(" [<%08lx>]", addr);
 			i++;
 		}
 	}
 	printk("\n");

 	printk("\nCode: ");

 	for (i = -24; i < 24; i++) {
 		unsigned char c;
 		c = ((unsigned char *)(__pa(regs->pc)))[i];

 		if (i == 0)
 			printk("(%02x) ", c);
 		else
 			printk("%02x ", c);
 	}
 	printk("\n");
 }

 /* This is normally the 'Oops' routine */
 void die(const char *str, struct pt_regs *regs, long err)
 {

 	console_verbose();
 	printk("\n%s#: %04lx\n", str, err & 0xffff);
 	show_registers(regs);
 #ifdef CONFIG_JUMP_UPON_UNHANDLED_EXCEPTION
 	printk("\n\nUNHANDLED_EXCEPTION: entering infinite loop\n");

 	/* shut down interrupts */
 	local_irq_disable();

 	__asm__ __volatile__("l.nop   1");
 	do {} while (1);
 #endif
 	do_exit(SIGSEGV);
 }

 /* This is normally the 'Oops' routine */
 void die_if_kernel(const char *str, struct pt_regs *regs, long err)
 {
 	if (user_mode(regs))
 		return;

 	die(str, regs, err);
 }

 void unhandled_exception(struct pt_regs *regs, int ea, int vector)
 {
 	printk("Unable to handle exception at EA =0x%x, vector 0x%x",
 	       ea, vector);
 	die("Oops", regs, 9);
 }

 void __init trap_init(void)
 {
 	/* Nothing needs to be done */
 }

 asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
 {
 	siginfo_t info;
 	memset(&info, 0, sizeof(info));
 	info.si_signo = SIGTRAP;
 	info.si_code = TRAP_TRACE;
 	info.si_addr = (void *)address;
 	force_sig_info(SIGTRAP, &info, current);

 	regs->pc += 4;
 }

 asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
 {
 	siginfo_t info;

 	if (user_mode(regs)) {
 		/* Send a SIGSEGV */
 		info.si_signo = SIGSEGV;
 		info.si_errno = 0;
 		/* info.si_code has been set above */
 		info.si_addr = (void *)address;
 		force_sig_info(SIGSEGV, &info, current);
 	} else {
 		printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
 		show_registers(regs);
 		die("Die:", regs, address);
 	}

 }

 asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
 {
 	siginfo_t info;

 	if (user_mode(regs)) {
 		/* Send a SIGBUS */
 		info.si_signo = SIGBUS;
 		info.si_errno = 0;
 		info.si_code = BUS_ADRERR;
 		info.si_addr = (void *)address;
 		force_sig_info(SIGBUS, &info, current);
 	} else {		/* Kernel mode */
 		printk("KERNEL: Bus error (SIGBUS) 0x%.8lx\n", address);
 		show_registers(regs);
 		die("Die:", regs, address);
 	}
 }

 asmlinkage void do_illegal_instruction(struct pt_regs *regs,
 				       unsigned long address)
 {
 	siginfo_t info;

 	if (user_mode(regs)) {
 		/* Send a SIGILL */
 		info.si_signo = SIGILL;
 		info.si_errno = 0;
 		info.si_code = ILL_ILLOPC;
 		info.si_addr = (void *)address;
 		force_sig_info(SIGBUS, &info, current);
 	} else {		/* Kernel mode */
 		printk("KERNEL: Illegal instruction (SIGILL) 0x%.8lx\n",
 		       address);
 		show_registers(regs);
 		die("Die:", regs, address);
 	}
 }
	/*
	* OpenRISC traps.c
	*
	* Linux architectural port borrowing liberally from similar works of
	* others. All original copyrights apply as per the original source
	* declaration.
	*
	* Modifications for the OpenRISC architecture:
	* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
	* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*
	* Here we handle the break vectors not used by the system call
	* mechanism, as well as some general stack/register dumping
	* things.
	*
	*/

	#include <linux/init.h>
	#include <linux/sched.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/kmod.h>
	#include <linux/string.h>
	#include <linux/errno.h>
	#include <linux/ptrace.h>
	#include <linux/timer.h>
	#include <linux/mm.h>
	#include <linux/kallsyms.h>
	#include <asm/uaccess.h>

	#include <asm/segment.h>
	#include <asm/io.h>
	#include <asm/pgtable.h>

	extern char _etext, _stext;

	int kstack_depth_to_print = 0x180;

	static inline int valid_stack_ptr(struct thread_info tinfo, void p)
	{
	return p > (void )tinfo && p < (void )tinfo + THREAD_SIZE - 3;
	}

	void show_trace(struct task_struct task, unsigned long stack)
	{
	struct thread_info *context;
	unsigned long addr;

	context = (struct thread_info *)
	((unsigned long)stack & (~(THREAD_SIZE - 1)));

	while (valid_stack_ptr(context, stack)) {
	addr = *stack++;
	if (__kernel_text_address(addr)) {
	printk(" [<%08lx>]", addr);
	print_symbol(" %s", addr);
	printk("\n");
	}
	}
	printk(" =======================\n");
	}

	/* displays a short stack trace */
	void show_stack(struct task_struct task, unsigned long esp)
	{
	unsigned long addr, *stack;
	int i;

	if (esp == NULL)
	esp = (unsigned long *)&esp;

	stack = esp;

	printk("Stack dump [0x%08lx]:\n", (unsigned long)esp);
	for (i = 0; i < kstack_depth_to_print; i++) {
	if (kstack_end(stack))
	break;
	if (__get_user(addr, stack)) {
	/* This message matches "failing address" marked
	s390 in ksymoops, so lines containing it will
	not be filtered out by ksymoops. */
	printk("Failing address 0x%lx\n", (unsigned long)stack);
	break;
	}
	stack++;

	printk("sp + %02d: 0x%08lx\n", i * 4, addr);
	}
	printk("\n");

	show_trace(task, esp);

	return;
	}

	void show_trace_task(struct task_struct *tsk)
	{
	/*
	* TODO: SysRq-T trace dump...
	*/
	}

	void show_registers(struct pt_regs *regs)
	{
	int i;
	int in_kernel = 1;
	unsigned long esp;

	esp = (unsigned long)(&regs->sp);
	if (user_mode(regs))
	in_kernel = 0;

	printk("CPU #: %d\n"
	" PC: %08lx SR: %08lx SP: %08lx\n",
	smp_processor_id(), regs->pc, regs->sr, regs->sp);
	printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
	0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
	printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
	regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
	printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
	regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
	printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
	regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
	printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
	regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
	printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
	regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
	printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
	regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
	printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
	regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
	printk(" RES: %08lx oGPR11: %08lx\n",
	regs->gpr[11], regs->orig_gpr11);

	printk("Process %s (pid: %d, stackpage=%08lx)\n",
	current->comm, current->pid, (unsigned long)current);
	/*
	* When in-kernel, we also print out the stack and code at the
	* time of the fault..
	*/
	if (in_kernel) {

	printk("\nStack: ");
	show_stack(NULL, (unsigned long *)esp);

	printk("\nCode: ");
	if (regs->pc < PAGE_OFFSET)
	goto bad;

	for (i = -24; i < 24; i++) {
	unsigned char c;
	if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
	bad:
	printk(" Bad PC value.");
	break;
	}

	if (i == 0)
	printk("(%02x) ", c);
	else
	printk("%02x ", c);
	}
	}
	printk("\n");
	}

	void nommu_dump_state(struct pt_regs *regs,
	unsigned long ea, unsigned long vector)
	{
	int i;
	unsigned long addr, stack = regs->sp;

	printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);

	printk("CPU #: %d\n"
	" PC: %08lx SR: %08lx SP: %08lx\n",
	0, regs->pc, regs->sr, regs->sp);
	printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
	0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
	printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
	regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
	printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
	regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
	printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
	regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
	printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
	regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
	printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
	regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
	printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
	regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
	printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
	regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
	printk(" RES: %08lx oGPR11: %08lx\n",
	regs->gpr[11], regs->orig_gpr11);

	printk("Process %s (pid: %d, stackpage=%08lx)\n",
	((struct task_struct *)(__pa(current)))->comm,
	((struct task_struct *)(__pa(current)))->pid,
	(unsigned long)current);

	printk("\nStack: ");
	printk("Stack dump [0x%08lx]:\n", (unsigned long)stack);
	for (i = 0; i < kstack_depth_to_print; i++) {
	if (((long)stack & (THREAD_SIZE - 1)) == 0)
	break;
	stack++;

	printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
	((unsigned long )(__pa(stack))));
	}
	printk("\n");

	printk("Call Trace: ");
	i = 1;
	while (((long)stack & (THREAD_SIZE - 1)) != 0) {
	addr = ((unsigned long )__pa(stack));
	stack++;

	if (kernel_text_address(addr)) {
	if (i && ((i % 6) == 0))
	printk("\n ");
	printk(" [<%08lx>]", addr);
	i++;
	}
	}
	printk("\n");

	printk("\nCode: ");

	for (i = -24; i < 24; i++) {
	unsigned char c;
	c = ((unsigned char *)(__pa(regs->pc)))[i];

	if (i == 0)
	printk("(%02x) ", c);
	else
	printk("%02x ", c);
	}
	printk("\n");
	}

	/* This is normally the 'Oops' routine */
	void die(const char str, struct pt_regs regs, long err)
	{

	console_verbose();
	printk("\n%s#: %04lx\n", str, err & 0xffff);
	show_registers(regs);
	#ifdef CONFIG_JUMP_UPON_UNHANDLED_EXCEPTION
	printk("\n\nUNHANDLED_EXCEPTION: entering infinite loop\n");

	/* shut down interrupts */
	local_irq_disable();

	__asm__ __volatile__("l.nop 1");
	do {} while (1);
	#endif
	do_exit(SIGSEGV);
	}

	/* This is normally the 'Oops' routine */
	void die_if_kernel(const char str, struct pt_regs regs, long err)
	{
	if (user_mode(regs))
	return;

	die(str, regs, err);
	}

	void unhandled_exception(struct pt_regs *regs, int ea, int vector)
	{
	printk("Unable to handle exception at EA =0x%x, vector 0x%x",
	ea, vector);
	die("Oops", regs, 9);
	}

	void __init trap_init(void)
	{
	/* Nothing needs to be done */
	}

	asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
	{
	siginfo_t info;
	memset(&info, 0, sizeof(info));
	info.si_signo = SIGTRAP;
	info.si_code = TRAP_TRACE;
	info.si_addr = (void *)address;
	force_sig_info(SIGTRAP, &info, current);

	regs->pc += 4;
	}

	asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
	{
	siginfo_t info;

	if (user_mode(regs)) {
	/* Send a SIGSEGV */
	info.si_signo = SIGSEGV;
	info.si_errno = 0;
	/* info.si_code has been set above */
	info.si_addr = (void *)address;
	force_sig_info(SIGSEGV, &info, current);
	} else {
	printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
	show_registers(regs);
	die("Die:", regs, address);
	}

	}

	asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
	{
	siginfo_t info;

	if (user_mode(regs)) {
	/* Send a SIGBUS */
	info.si_signo = SIGBUS;
	info.si_errno = 0;
	info.si_code = BUS_ADRERR;
	info.si_addr = (void *)address;
	force_sig_info(SIGBUS, &info, current);
	} else { /* Kernel mode */
	printk("KERNEL: Bus error (SIGBUS) 0x%.8lx\n", address);
	show_registers(regs);
	die("Die:", regs, address);
	}
	}

	asmlinkage void do_illegal_instruction(struct pt_regs *regs,
	unsigned long address)
	{
	siginfo_t info;

	if (user_mode(regs)) {
	/* Send a SIGILL */
	info.si_signo = SIGILL;
	info.si_errno = 0;
	info.si_code = ILL_ILLOPC;
	info.si_addr = (void *)address;
	force_sig_info(SIGBUS, &info, current);
	} else { /* Kernel mode */
	printk("KERNEL: Illegal instruction (SIGILL) 0x%.8lx\n",
	address);
	show_registers(regs);
	die("Die:", regs, address);
	}
	}