i386: prepare shared kernel/traps.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 1250 deletions

diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
deleted file mode 100644
index 47b0bef335b..00000000000
--- a/arch/i386/kernel/traps.c
+++ /dev/null
@@ -1,1250 +0,0 @@
-/*
- *  linux/arch/i386/traps.c
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- *  Pentium III FXSR, SSE support
- *	Gareth Hughes <gareth@valinux.com>, May 2000
- */
-
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'asm.s'.
- */
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/highmem.h>
-#include <linux/kallsyms.h>
-#include <linux/ptrace.h>
-#include <linux/utsname.h>
-#include <linux/kprobes.h>
-#include <linux/kexec.h>
-#include <linux/unwind.h>
-#include <linux/uaccess.h>
-#include <linux/nmi.h>
-#include <linux/bug.h>
-
-#ifdef CONFIG_EISA
-#include <linux/ioport.h>
-#include <linux/eisa.h>
-#endif
-
-#ifdef CONFIG_MCA
-#include <linux/mca.h>
-#endif
-
-#if defined(CONFIG_EDAC)
-#include <linux/edac.h>
-#endif
-
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/atomic.h>
-#include <asm/debugreg.h>
-#include <asm/desc.h>
-#include <asm/i387.h>
-#include <asm/nmi.h>
-#include <asm/unwind.h>
-#include <asm/smp.h>
-#include <asm/arch_hooks.h>
-#include <linux/kdebug.h>
-#include <asm/stacktrace.h>
-
-#include <linux/module.h>
-
-#include "mach_traps.h"
-
-int panic_on_unrecovered_nmi;
-
-asmlinkage int system_call(void);
-
-/* Do we ignore FPU interrupts ? */
-char ignore_fpu_irq = 0;
-
-/*
- * The IDT has to be page-aligned to simplify the Pentium
- * F0 0F bug workaround.. We have a special link segment
- * for this.
- */
-struct desc_struct idt_table[256] __attribute__((__section__(".data.idt"))) = { {0, 0}, };
-
-asmlinkage void divide_error(void);
-asmlinkage void debug(void);
-asmlinkage void nmi(void);
-asmlinkage void int3(void);
-asmlinkage void overflow(void);
-asmlinkage void bounds(void);
-asmlinkage void invalid_op(void);
-asmlinkage void device_not_available(void);
-asmlinkage void coprocessor_segment_overrun(void);
-asmlinkage void invalid_TSS(void);
-asmlinkage void segment_not_present(void);
-asmlinkage void stack_segment(void);
-asmlinkage void general_protection(void);
-asmlinkage void page_fault(void);
-asmlinkage void coprocessor_error(void);
-asmlinkage void simd_coprocessor_error(void);
-asmlinkage void alignment_check(void);
-asmlinkage void spurious_interrupt_bug(void);
-asmlinkage void machine_check(void);
-
-int kstack_depth_to_print = 24;
-static unsigned int code_bytes = 64;
-
-static inline int valid_stack_ptr(struct thread_info *tinfo, void *p, unsigned size)
-{
-	return	p > (void *)tinfo &&
-		p <= (void *)tinfo + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
-	struct stack_frame *next_frame;
-	unsigned long return_address;
-};
-
-static inline unsigned long print_context_stack(struct thread_info *tinfo,
-				unsigned long *stack, unsigned long ebp,
-				struct stacktrace_ops *ops, void *data)
-{
-#ifdef	CONFIG_FRAME_POINTER
-	struct stack_frame *frame = (struct stack_frame *)ebp;
-	while (valid_stack_ptr(tinfo, frame, sizeof(*frame))) {
-		struct stack_frame *next;
-		unsigned long addr;
-
-		addr = frame->return_address;
-		ops->address(data, addr);
-		/*
-		 * break out of recursive entries (such as
-		 * end_of_stack_stop_unwind_function). Also,
-		 * we can never allow a frame pointer to
-		 * move downwards!
-		 */
-		next = frame->next_frame;
-		if (next <= frame)
-			break;
-		frame = next;
-	}
-#else
-	while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
-		unsigned long addr;
-
-		addr = *stack++;
-		if (__kernel_text_address(addr))
-			ops->address(data, addr);
-	}
-#endif
-	return ebp;
-}
-
-#define MSG(msg) ops->warning(data, msg)
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
-	        unsigned long *stack,
-		struct stacktrace_ops *ops, void *data)
-{
-	unsigned long ebp = 0;
-
-	if (!task)
-		task = current;
-
-	if (!stack) {
-		unsigned long dummy;
-		stack = &dummy;
-		if (task != current)
-			stack = (unsigned long *)task->thread.esp;
-	}
-
-#ifdef CONFIG_FRAME_POINTER
-	if (!ebp) {
-		if (task == current) {
-			/* Grab ebp right from our regs */
-			asm ("movl %%ebp, %0" : "=r" (ebp) : );
-		} else {
-			/* ebp is the last reg pushed by switch_to */
-			ebp = *(unsigned long *) task->thread.esp;
-		}
-	}
-#endif
-
-	while (1) {
-		struct thread_info *context;
-		context = (struct thread_info *)
-			((unsigned long)stack & (~(THREAD_SIZE - 1)));
-		ebp = print_context_stack(context, stack, ebp, ops, data);
-		/* Should be after the line below, but somewhere
-		   in early boot context comes out corrupted and we
-		   can't reference it -AK */
-		if (ops->stack(data, "IRQ") < 0)
-			break;
-		stack = (unsigned long*)context->previous_esp;
-		if (!stack)
-			break;
-		touch_nmi_watchdog();
-	}
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
-	printk(data);
-	print_symbol(msg, symbol);
-	printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
-	printk("%s%s\n", (char *)data, msg);
-}
-
-static int print_trace_stack(void *data, char *name)
-{
-	return 0;
-}
-
-/*
- * Print one address/symbol entries per line.
- */
-static void print_trace_address(void *data, unsigned long addr)
-{
-	printk("%s [<%08lx>] ", (char *)data, addr);
-	print_symbol("%s\n", addr);
-	touch_nmi_watchdog();
-}
-
-static struct stacktrace_ops print_trace_ops = {
-	.warning = print_trace_warning,
-	.warning_symbol = print_trace_warning_symbol,
-	.stack = print_trace_stack,
-	.address = print_trace_address,
-};
-
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
-		   unsigned long * stack, char *log_lvl)
-{
-	dump_trace(task, regs, stack, &print_trace_ops, log_lvl);
-	printk("%s =======================\n", log_lvl);
-}
-
-void show_trace(struct task_struct *task, struct pt_regs *regs,
-		unsigned long * stack)
-{
-	show_trace_log_lvl(task, regs, stack, "");
-}
-
-static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
-			       unsigned long *esp, char *log_lvl)
-{
-	unsigned long *stack;
-	int i;
-
-	if (esp == NULL) {
-		if (task)
-			esp = (unsigned long*)task->thread.esp;
-		else
-			esp = (unsigned long *)&esp;
-	}
-
-	stack = esp;
-	for(i = 0; i < kstack_depth_to_print; i++) {
-		if (kstack_end(stack))
-			break;
-		if (i && ((i % 8) == 0))
-			printk("\n%s       ", log_lvl);
-		printk("%08lx ", *stack++);
-	}
-	printk("\n%sCall Trace:\n", log_lvl);
-	show_trace_log_lvl(task, regs, esp, log_lvl);
-}
-
-void show_stack(struct task_struct *task, unsigned long *esp)
-{
-	printk("       ");
-	show_stack_log_lvl(task, NULL, esp, "");
-}
-
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_trace(current, NULL, &stack);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
-	int i;
-	int in_kernel = 1;
-	unsigned long esp;
-	unsigned short ss, gs;
-
-	esp = (unsigned long) (&regs->esp);
-	savesegment(ss, ss);
-	savesegment(gs, gs);
-	if (user_mode_vm(regs)) {
-		in_kernel = 0;
-		esp = regs->esp;
-		ss = regs->xss & 0xffff;
-	}
-	print_modules();
-	printk(KERN_EMERG "CPU:    %d\n"
-		KERN_EMERG "EIP:    %04x:[<%08lx>]    %s VLI\n"
-		KERN_EMERG "EFLAGS: %08lx   (%s %.*s)\n",
-		smp_processor_id(), 0xffff & regs->xcs, regs->eip,
-		print_tainted(), regs->eflags, init_utsname()->release,
-		(int)strcspn(init_utsname()->version, " "),
-		init_utsname()->version);
-	print_symbol(KERN_EMERG "EIP is at %s\n", regs->eip);
-	printk(KERN_EMERG "eax: %08lx   ebx: %08lx   ecx: %08lx   edx: %08lx\n",
-		regs->eax, regs->ebx, regs->ecx, regs->edx);
-	printk(KERN_EMERG "esi: %08lx   edi: %08lx   ebp: %08lx   esp: %08lx\n",
-		regs->esi, regs->edi, regs->ebp, esp);
-	printk(KERN_EMERG "ds: %04x   es: %04x   fs: %04x  gs: %04x  ss: %04x\n",
-	       regs->xds & 0xffff, regs->xes & 0xffff, regs->xfs & 0xffff, gs, ss);
-	printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
-		TASK_COMM_LEN, current->comm, current->pid,
-		current_thread_info(), current, task_thread_info(current));
-	/*
-	 * When in-kernel, we also print out the stack and code at the
-	 * time of the fault..
-	 */
-	if (in_kernel) {
-		u8 *eip;
-		unsigned int code_prologue = code_bytes * 43 / 64;
-		unsigned int code_len = code_bytes;
-		unsigned char c;
-
-		printk("\n" KERN_EMERG "Stack: ");
-		show_stack_log_lvl(NULL, regs, (unsigned long *)esp, KERN_EMERG);
-
-		printk(KERN_EMERG "Code: ");
-
-		eip = (u8 *)regs->eip - code_prologue;
-		if (eip < (u8 *)PAGE_OFFSET ||
-			probe_kernel_address(eip, c)) {
-			/* try starting at EIP */
-			eip = (u8 *)regs->eip;
-			code_len = code_len - code_prologue + 1;
-		}
-		for (i = 0; i < code_len; i++, eip++) {
-			if (eip < (u8 *)PAGE_OFFSET ||
-				probe_kernel_address(eip, c)) {
-				printk(" Bad EIP value.");
-				break;
-			}
-			if (eip == (u8 *)regs->eip)
-				printk("<%02x> ", c);
-			else
-				printk("%02x ", c);
-		}
-	}
-	printk("\n");
-}	
-
-int is_valid_bugaddr(unsigned long eip)
-{
-	unsigned short ud2;
-
-	if (eip < PAGE_OFFSET)
-		return 0;
-	if (probe_kernel_address((unsigned short *)eip, ud2))
-		return 0;
-
-	return ud2 == 0x0b0f;
-}
-
-/*
- * This is gone through when something in the kernel has done something bad and
- * is about to be terminated.
- */
-void die(const char * str, struct pt_regs * regs, long err)
-{
-	static struct {
-		spinlock_t lock;
-		u32 lock_owner;
-		int lock_owner_depth;
-	} die = {
-		.lock =			__SPIN_LOCK_UNLOCKED(die.lock),
-		.lock_owner =		-1,
-		.lock_owner_depth =	0
-	};
-	static int die_counter;
-	unsigned long flags;
-
-	oops_enter();
-
-	if (die.lock_owner != raw_smp_processor_id()) {
-		console_verbose();
-		spin_lock_irqsave(&die.lock, flags);
-		die.lock_owner = smp_processor_id();
-		die.lock_owner_depth = 0;
-		bust_spinlocks(1);
-	}
-	else
-		local_save_flags(flags);
-
-	if (++die.lock_owner_depth < 3) {
-		int nl = 0;
-		unsigned long esp;
-		unsigned short ss;
-
-		report_bug(regs->eip, regs);
-
-		printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
-		printk(KERN_EMERG "PREEMPT ");
-		nl = 1;
-#endif
-#ifdef CONFIG_SMP
-		if (!nl)
-			printk(KERN_EMERG);
-		printk("SMP ");
-		nl = 1;
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
-		if (!nl)
-			printk(KERN_EMERG);
-		printk("DEBUG_PAGEALLOC");
-		nl = 1;
-#endif
-		if (nl)
-			printk("\n");
-		if (notify_die(DIE_OOPS, str, regs, err,
-					current->thread.trap_no, SIGSEGV) !=
-				NOTIFY_STOP) {
-			show_registers(regs);
-			/* Executive summary in case the oops scrolled away */
-			esp = (unsigned long) (&regs->esp);
-			savesegment(ss, ss);
-			if (user_mode(regs)) {
-				esp = regs->esp;
-				ss = regs->xss & 0xffff;
-			}
-			printk(KERN_EMERG "EIP: [<%08lx>] ", regs->eip);
-			print_symbol("%s", regs->eip);
-			printk(" SS:ESP %04x:%08lx\n", ss, esp);
-		}
-		else
-			regs = NULL;
-  	} else
-		printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
-
-	bust_spinlocks(0);
-	die.lock_owner = -1;
-	add_taint(TAINT_DIE);
-	spin_unlock_irqrestore(&die.lock, flags);
-
-	if (!regs)
-		return;
-
-	if (kexec_should_crash(current))
-		crash_kexec(regs);
-
-	if (in_interrupt())
-		panic("Fatal exception in interrupt");
-
-	if (panic_on_oops)
-		panic("Fatal exception");
-
-	oops_exit();
-	do_exit(SIGSEGV);
-}
-
-static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err)
-{
-	if (!user_mode_vm(regs))
-		die(str, regs, err);
-}
-
-static void __kprobes do_trap(int trapnr, int signr, char *str, int vm86,
-			      struct pt_regs * regs, long error_code,
-			      siginfo_t *info)
-{
-	struct task_struct *tsk = current;
-
-	if (regs->eflags & VM_MASK) {
-		if (vm86)
-			goto vm86_trap;
-		goto trap_signal;
-	}
-
-	if (!user_mode(regs))
-		goto kernel_trap;
-
-	trap_signal: {
-		/*
-		 * We want error_code and trap_no set for userspace faults and
-		 * kernelspace faults which result in die(), but not
-		 * kernelspace faults which are fixed up.  die() gives the
-		 * process no chance to handle the signal and notice the
-		 * kernel fault information, so that won't result in polluting
-		 * the information about previously queued, but not yet
-		 * delivered, faults.  See also do_general_protection below.
-		 */
-		tsk->thread.error_code = error_code;
-		tsk->thread.trap_no = trapnr;
-
-		if (info)
-			force_sig_info(signr, info, tsk);
-		else
-			force_sig(signr, tsk);
-		return;
-	}
-
-	kernel_trap: {
-		if (!fixup_exception(regs)) {
-			tsk->thread.error_code = error_code;
-			tsk->thread.trap_no = trapnr;
-			die(str, regs, error_code);
-		}
-		return;
-	}
-
-	vm86_trap: {
-		int ret = handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, trapnr);
-		if (ret) goto trap_signal;
-		return;
-	}
-}
-
-#define DO_ERROR(trapnr, signr, str, name) \
-fastcall void do_##name(struct pt_regs * regs, long error_code) \
-{ \
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
-						== NOTIFY_STOP) \
-		return; \
-	do_trap(trapnr, signr, str, 0, regs, error_code, NULL); \
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq) \
-fastcall void do_##name(struct pt_regs * regs, long error_code) \
-{ \
-	siginfo_t info; \
-	if (irq) \
-		local_irq_enable(); \
-	info.si_signo = signr; \
-	info.si_errno = 0; \
-	info.si_code = sicode; \
-	info.si_addr = (void __user *)siaddr; \
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
-						== NOTIFY_STOP) \
-		return; \
-	do_trap(trapnr, signr, str, 0, regs, error_code, &info); \
-}
-
-#define DO_VM86_ERROR(trapnr, signr, str, name) \
-fastcall void do_##name(struct pt_regs * regs, long error_code) \
-{ \
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
-						== NOTIFY_STOP) \
-		return; \
-	do_trap(trapnr, signr, str, 1, regs, error_code, NULL); \
-}
-
-#define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
-fastcall void do_##name(struct pt_regs * regs, long error_code) \
-{ \
-	siginfo_t info; \
-	info.si_signo = signr; \
-	info.si_errno = 0; \
-	info.si_code = sicode; \
-	info.si_addr = (void __user *)siaddr; \
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
-						== NOTIFY_STOP) \
-		return; \
-	do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
-}
-
-DO_VM86_ERROR_INFO( 0, SIGFPE,  "divide error", divide_error, FPE_INTDIV, regs->eip)
-#ifndef CONFIG_KPROBES
-DO_VM86_ERROR( 3, SIGTRAP, "int3", int3)
-#endif
-DO_VM86_ERROR( 4, SIGSEGV, "overflow", overflow)
-DO_VM86_ERROR( 5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO( 6, SIGILL,  "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip, 0)
-DO_ERROR( 9, SIGFPE,  "coprocessor segment overrun", coprocessor_segment_overrun)
-DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
-DO_ERROR(11, SIGBUS,  "segment not present", segment_not_present)
-DO_ERROR(12, SIGBUS,  "stack segment", stack_segment)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
-DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0, 1)
-
-fastcall void __kprobes do_general_protection(struct pt_regs * regs,
-					      long error_code)
-{
-	int cpu = get_cpu();
-	struct tss_struct *tss = &per_cpu(init_tss, cpu);
-	struct thread_struct *thread = &current->thread;
-
-	/*
-	 * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
-	 * invalid offset set (the LAZY one) and the faulting thread has
-	 * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS
-	 * and we set the offset field correctly. Then we let the CPU to
-	 * restart the faulting instruction.
-	 */
-	if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
-	    thread->io_bitmap_ptr) {
-		memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
-		       thread->io_bitmap_max);
-		/*
-		 * If the previously set map was extending to higher ports
-		 * than the current one, pad extra space with 0xff (no access).
-		 */
-		if (thread->io_bitmap_max < tss->io_bitmap_max)
-			memset((char *) tss->io_bitmap +
-				thread->io_bitmap_max, 0xff,
-				tss->io_bitmap_max - thread->io_bitmap_max);
-		tss->io_bitmap_max = thread->io_bitmap_max;
-		tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
-		tss->io_bitmap_owner = thread;
-		put_cpu();
-		return;
-	}
-	put_cpu();
-
-	if (regs->eflags & VM_MASK)
-		goto gp_in_vm86;
-
-	if (!user_mode(regs))
-		goto gp_in_kernel;
-
-	current->thread.error_code = error_code;
-	current->thread.trap_no = 13;
-	if (show_unhandled_signals && unhandled_signal(current, SIGSEGV) &&
-	    printk_ratelimit())
-		printk(KERN_INFO
-		    "%s[%d] general protection eip:%lx esp:%lx error:%lx\n",
-		    current->comm, current->pid,
-		    regs->eip, regs->esp, error_code);
-
-	force_sig(SIGSEGV, current);
-	return;
-
-gp_in_vm86:
-	local_irq_enable();
-	handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
-	return;
-
-gp_in_kernel:
-	if (!fixup_exception(regs)) {
-		current->thread.error_code = error_code;
-		current->thread.trap_no = 13;
-		if (notify_die(DIE_GPF, "general protection fault", regs,
-				error_code, 13, SIGSEGV) == NOTIFY_STOP)
-			return;
-		die("general protection fault", regs, error_code);
-	}
-}
-
-static __kprobes void
-mem_parity_error(unsigned char reason, struct pt_regs * regs)
-{
-	printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
-		"CPU %d.\n", reason, smp_processor_id());
-	printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
-
-#if defined(CONFIG_EDAC)
-	if(edac_handler_set()) {
-		edac_atomic_assert_error();
-		return;
-	}
-#endif
-
-	if (panic_on_unrecovered_nmi)
-                panic("NMI: Not continuing");
-
-	printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-
-	/* Clear and disable the memory parity error line. */
-	clear_mem_error(reason);
-}
-
-static __kprobes void
-io_check_error(unsigned char reason, struct pt_regs * regs)
-{
-	unsigned long i;
-
-	printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
-	show_registers(regs);
-
-	/* Re-enable the IOCK line, wait for a few seconds */
-	reason = (reason & 0xf) | 8;
-	outb(reason, 0x61);
-	i = 2000;
-	while (--i) udelay(1000);
-	reason &= ~8;
-	outb(reason, 0x61);
-}
-
-static __kprobes void
-unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
-{
-#ifdef CONFIG_MCA
-	/* Might actually be able to figure out what the guilty party
-	* is. */
-	if( MCA_bus ) {
-		mca_handle_nmi();
-		return;
-	}
-#endif
-	printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x on "
-		"CPU %d.\n", reason, smp_processor_id());
-	printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
-	if (panic_on_unrecovered_nmi)
-                panic("NMI: Not continuing");
-
-	printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-}
-
-static DEFINE_SPINLOCK(nmi_print_lock);
-
-void __kprobes die_nmi(struct pt_regs *regs, const char *msg)
-{
-	if (notify_die(DIE_NMIWATCHDOG, msg, regs, 0, 2, SIGINT) ==
-	    NOTIFY_STOP)
-		return;
-
-	spin_lock(&nmi_print_lock);
-	/*
-	* We are in trouble anyway, lets at least try
-	* to get a message out.
-	*/
-	bust_spinlocks(1);
-	printk(KERN_EMERG "%s", msg);
-	printk(" on CPU%d, eip %08lx, registers:\n",
-		smp_processor_id(), regs->eip);
-	show_registers(regs);
-	console_silent();
-	spin_unlock(&nmi_print_lock);
-	bust_spinlocks(0);
-
-	/* If we are in kernel we are probably nested up pretty bad
-	 * and might aswell get out now while we still can.
-	*/
-	if (!user_mode_vm(regs)) {
-		current->thread.trap_no = 2;
-		crash_kexec(regs);
-	}
-
-	do_exit(SIGSEGV);
-}
-
-static __kprobes void default_do_nmi(struct pt_regs * regs)
-{
-	unsigned char reason = 0;
-
-	/* Only the BSP gets external NMIs from the system.  */
-	if (!smp_processor_id())
-		reason = get_nmi_reason();
- 
-	if (!(reason & 0xc0)) {
-		if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
-							== NOTIFY_STOP)
-			return;
-#ifdef CONFIG_X86_LOCAL_APIC
-		/*
-		 * Ok, so this is none of the documented NMI sources,
-		 * so it must be the NMI watchdog.
-		 */
-		if (nmi_watchdog_tick(regs, reason))
-			return;
-		if (!do_nmi_callback(regs, smp_processor_id()))
-#endif
-			unknown_nmi_error(reason, regs);
-
-		return;
-	}
-	if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
-		return;
-	if (reason & 0x80)
-		mem_parity_error(reason, regs);
-	if (reason & 0x40)
-		io_check_error(reason, regs);
-	/*
-	 * Reassert NMI in case it became active meanwhile
-	 * as it's edge-triggered.
-	 */
-	reassert_nmi();
-}
-
-static int ignore_nmis;
-
-fastcall __kprobes void do_nmi(struct pt_regs * regs, long error_code)
-{
-	int cpu;
-
-	nmi_enter();
-
-	cpu = smp_processor_id();
-
-	++nmi_count(cpu);
-
-	if (!ignore_nmis)
-		default_do_nmi(regs);
-
-	nmi_exit();
-}
-
-void stop_nmi(void)
-{
-	acpi_nmi_disable();
-	ignore_nmis++;
-}
-
-void restart_nmi(void)
-{
-	ignore_nmis--;
-	acpi_nmi_enable();
-}
-
-#ifdef CONFIG_KPROBES
-fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
-{
-	if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
-			== NOTIFY_STOP)
-		return;
-	/* This is an interrupt gate, because kprobes wants interrupts
-	disabled.  Normal trap handlers don't. */
-	restore_interrupts(regs);
-	do_trap(3, SIGTRAP, "int3", 1, regs, error_code, NULL);
-}
-#endif
-
-/*
- * Our handling of the processor debug registers is non-trivial.
- * We do not clear them on entry and exit from the kernel. Therefore
- * it is possible to get a watchpoint trap here from inside the kernel.
- * However, the code in ./ptrace.c has ensured that the user can
- * only set watchpoints on userspace addresses. Therefore the in-kernel
- * watchpoint trap can only occur in code which is reading/writing
- * from user space. Such code must not hold kernel locks (since it
- * can equally take a page fault), therefore it is safe to call
- * force_sig_info even though that claims and releases locks.
- * 
- * Code in ./signal.c ensures that the debug control register
- * is restored before we deliver any signal, and therefore that
- * user code runs with the correct debug control register even though
- * we clear it here.
- *
- * Being careful here means that we don't have to be as careful in a
- * lot of more complicated places (task switching can be a bit lazy
- * about restoring all the debug state, and ptrace doesn't have to
- * find every occurrence of the TF bit that could be saved away even
- * by user code)
- */
-fastcall void __kprobes do_debug(struct pt_regs * regs, long error_code)
-{
-	unsigned int condition;
-	struct task_struct *tsk = current;
-
-	get_debugreg(condition, 6);
-
-	if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
-					SIGTRAP) == NOTIFY_STOP)
-		return;
-	/* It's safe to allow irq's after DR6 has been saved */
-	if (regs->eflags & X86_EFLAGS_IF)
-		local_irq_enable();
-
-	/* Mask out spurious debug traps due to lazy DR7 setting */
-	if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
-		if (!tsk->thread.debugreg[7])
-			goto clear_dr7;
-	}
-
-	if (regs->eflags & VM_MASK)
-		goto debug_vm86;
-
-	/* Save debug status register where ptrace can see it */
-	tsk->thread.debugreg[6] = condition;
-
-	/*
-	 * Single-stepping through TF: make sure we ignore any events in
-	 * kernel space (but re-enable TF when returning to user mode).
-	 */
-	if (condition & DR_STEP) {
-		/*
-		 * We already checked v86 mode above, so we can
-		 * check for kernel mode by just checking the CPL
-		 * of CS.
-		 */
-		if (!user_mode(regs))
-			goto clear_TF_reenable;
-	}
-
-	/* Ok, finally something we can handle */
-	send_sigtrap(tsk, regs, error_code);
-
-	/* Disable additional traps. They'll be re-enabled when
-	 * the signal is delivered.
-	 */
-clear_dr7:
-	set_debugreg(0, 7);
-	return;
-
-debug_vm86:
-	handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, 1);
-	return;
-
-clear_TF_reenable:
-	set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
-	regs->eflags &= ~TF_MASK;
-	return;
-}
-
-/*
- * Note that we play around with the 'TS' bit in an attempt to get
- * the correct behaviour even in the presence of the asynchronous
- * IRQ13 behaviour
- */
-void math_error(void __user *eip)
-{
-	struct task_struct * task;
-	siginfo_t info;
-	unsigned short cwd, swd;
-
-	/*
-	 * Save the info for the exception handler and clear the error.
-	 */
-	task = current;
-	save_init_fpu(task);
-	task->thread.trap_no = 16;
-	task->thread.error_code = 0;
-	info.si_signo = SIGFPE;
-	info.si_errno = 0;
-	info.si_code = __SI_FAULT;
-	info.si_addr = eip;
-	/*
-	 * (~cwd & swd) will mask out exceptions that are not set to unmasked
-	 * status.  0x3f is the exception bits in these regs, 0x200 is the
-	 * C1 reg you need in case of a stack fault, 0x040 is the stack
-	 * fault bit.  We should only be taking one exception at a time,
-	 * so if this combination doesn't produce any single exception,
-	 * then we have a bad program that isn't syncronizing its FPU usage
-	 * and it will suffer the consequences since we won't be able to
-	 * fully reproduce the context of the exception
-	 */
-	cwd = get_fpu_cwd(task);
-	swd = get_fpu_swd(task);
-	switch (swd & ~cwd & 0x3f) {
-		case 0x000: /* No unmasked exception */
-			return;
-		default:    /* Multiple exceptions */
-			break;
-		case 0x001: /* Invalid Op */
-			/*
-			 * swd & 0x240 == 0x040: Stack Underflow
-			 * swd & 0x240 == 0x240: Stack Overflow
-			 * User must clear the SF bit (0x40) if set
-			 */
-			info.si_code = FPE_FLTINV;
-			break;
-		case 0x002: /* Denormalize */
-		case 0x010: /* Underflow */
-			info.si_code = FPE_FLTUND;
-			break;
-		case 0x004: /* Zero Divide */
-			info.si_code = FPE_FLTDIV;
-			break;
-		case 0x008: /* Overflow */
-			info.si_code = FPE_FLTOVF;
-			break;
-		case 0x020: /* Precision */
-			info.si_code = FPE_FLTRES;
-			break;
-	}
-	force_sig_info(SIGFPE, &info, task);
-}
-
-fastcall void do_coprocessor_error(struct pt_regs * regs, long error_code)
-{
-	ignore_fpu_irq = 1;
-	math_error((void __user *)regs->eip);
-}
-
-static void simd_math_error(void __user *eip)
-{
-	struct task_struct * task;
-	siginfo_t info;
-	unsigned short mxcsr;
-
-	/*
-	 * Save the info for the exception handler and clear the error.
-	 */
-	task = current;
-	save_init_fpu(task);
-	task->thread.trap_no = 19;
-	task->thread.error_code = 0;
-	info.si_signo = SIGFPE;
-	info.si_errno = 0;
-	info.si_code = __SI_FAULT;
-	info.si_addr = eip;
-	/*
-	 * The SIMD FPU exceptions are handled a little differently, as there
-	 * is only a single status/control register.  Thus, to determine which
-	 * unmasked exception was caught we must mask the exception mask bits
-	 * at 0x1f80, and then use these to mask the exception bits at 0x3f.
-	 */
-	mxcsr = get_fpu_mxcsr(task);
-	switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
-		case 0x000:
-		default:
-			break;
-		case 0x001: /* Invalid Op */
-			info.si_code = FPE_FLTINV;
-			break;
-		case 0x002: /* Denormalize */
-		case 0x010: /* Underflow */
-			info.si_code = FPE_FLTUND;
-			break;
-		case 0x004: /* Zero Divide */
-			info.si_code = FPE_FLTDIV;
-			break;
-		case 0x008: /* Overflow */
-			info.si_code = FPE_FLTOVF;
-			break;
-		case 0x020: /* Precision */
-			info.si_code = FPE_FLTRES;
-			break;
-	}
-	force_sig_info(SIGFPE, &info, task);
-}
-
-fastcall void do_simd_coprocessor_error(struct pt_regs * regs,
-					  long error_code)
-{
-	if (cpu_has_xmm) {
-		/* Handle SIMD FPU exceptions on PIII+ processors. */
-		ignore_fpu_irq = 1;
-		simd_math_error((void __user *)regs->eip);
-	} else {
-		/*
-		 * Handle strange cache flush from user space exception
-		 * in all other cases.  This is undocumented behaviour.
-		 */
-		if (regs->eflags & VM_MASK) {
-			handle_vm86_fault((struct kernel_vm86_regs *)regs,
-					  error_code);
-			return;
-		}
-		current->thread.trap_no = 19;
-		current->thread.error_code = error_code;
-		die_if_kernel("cache flush denied", regs, error_code);
-		force_sig(SIGSEGV, current);
-	}
-}
-
-fastcall void do_spurious_interrupt_bug(struct pt_regs * regs,
-					  long error_code)
-{
-#if 0
-	/* No need to warn about this any longer. */
-	printk("Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
-#endif
-}
-
-fastcall unsigned long patch_espfix_desc(unsigned long uesp,
-					  unsigned long kesp)
-{
-	struct desc_struct *gdt = __get_cpu_var(gdt_page).gdt;
-	unsigned long base = (kesp - uesp) & -THREAD_SIZE;
-	unsigned long new_kesp = kesp - base;
-	unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT;
-	__u64 desc = *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS];
-	/* Set up base for espfix segment */
- 	desc &= 0x00f0ff0000000000ULL;
- 	desc |=	((((__u64)base) << 16) & 0x000000ffffff0000ULL) |
-		((((__u64)base) << 32) & 0xff00000000000000ULL) |
-		((((__u64)lim_pages) << 32) & 0x000f000000000000ULL) |
-		(lim_pages & 0xffff);
-	*(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS] = desc;
-	return new_kesp;
-}
-
-/*
- *  'math_state_restore()' saves the current math information in the
- * old math state array, and gets the new ones from the current task
- *
- * Careful.. There are problems with IBM-designed IRQ13 behaviour.
- * Don't touch unless you *really* know how it works.
- *
- * Must be called with kernel preemption disabled (in this case,
- * local interrupts are disabled at the call-site in entry.S).
- */
-asmlinkage void math_state_restore(void)
-{
-	struct thread_info *thread = current_thread_info();
-	struct task_struct *tsk = thread->task;
-
-	clts();		/* Allow maths ops (or we recurse) */
-	if (!tsk_used_math(tsk))
-		init_fpu(tsk);
-	restore_fpu(tsk);
-	thread->status |= TS_USEDFPU;	/* So we fnsave on switch_to() */
-	tsk->fpu_counter++;
-}
-EXPORT_SYMBOL_GPL(math_state_restore);
-
-#ifndef CONFIG_MATH_EMULATION
-
-asmlinkage void math_emulate(long arg)
-{
-	printk(KERN_EMERG "math-emulation not enabled and no coprocessor found.\n");
-	printk(KERN_EMERG "killing %s.\n",current->comm);
-	force_sig(SIGFPE,current);
-	schedule();
-}
-
-#endif /* CONFIG_MATH_EMULATION */
-
-#ifdef CONFIG_X86_F00F_BUG
-void __init trap_init_f00f_bug(void)
-{
-	__set_fixmap(FIX_F00F_IDT, __pa(&idt_table), PAGE_KERNEL_RO);
-
-	/*
-	 * Update the IDT descriptor and reload the IDT so that
-	 * it uses the read-only mapped virtual address.
-	 */
-	idt_descr.address = fix_to_virt(FIX_F00F_IDT);
-	load_idt(&idt_descr);
-}
-#endif
-
-/*
- * This needs to use 'idt_table' rather than 'idt', and
- * thus use the _nonmapped_ version of the IDT, as the
- * Pentium F0 0F bugfix can have resulted in the mapped
- * IDT being write-protected.
- */
-void set_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS);
-}
-
-/*
- * This routine sets up an interrupt gate at directory privilege level 3.
- */
-static inline void set_system_intr_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_INT | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_trap_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP, addr, __KERNEL_CS);
-}
-
-static void __init set_system_gate(unsigned int n, void *addr)
-{
-	_set_gate(n, DESCTYPE_TRAP | DESCTYPE_DPL3, addr, __KERNEL_CS);
-}
-
-static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
-{
-	_set_gate(n, DESCTYPE_TASK, (void *)0, (gdt_entry<<3));
-}
-
-
-void __init trap_init(void)
-{
-#ifdef CONFIG_EISA
-	void __iomem *p = ioremap(0x0FFFD9, 4);
-	if (readl(p) == 'E'+('I'<<8)+('S'<<16)+('A'<<24)) {
-		EISA_bus = 1;
-	}
-	iounmap(p);
-#endif
-
-#ifdef CONFIG_X86_LOCAL_APIC
-	init_apic_mappings();
-#endif
-
-	set_trap_gate(0,&divide_error);
-	set_intr_gate(1,&debug);
-	set_intr_gate(2,&nmi);
-	set_system_intr_gate(3, &int3); /* int3/4 can be called from all */
-	set_system_gate(4,&overflow);
-	set_trap_gate(5,&bounds);
-	set_trap_gate(6,&invalid_op);
-	set_trap_gate(7,&device_not_available);
-	set_task_gate(8,GDT_ENTRY_DOUBLEFAULT_TSS);
-	set_trap_gate(9,&coprocessor_segment_overrun);
-	set_trap_gate(10,&invalid_TSS);
-	set_trap_gate(11,&segment_not_present);
-	set_trap_gate(12,&stack_segment);
-	set_trap_gate(13,&general_protection);
-	set_intr_gate(14,&page_fault);
-	set_trap_gate(15,&spurious_interrupt_bug);
-	set_trap_gate(16,&coprocessor_error);
-	set_trap_gate(17,&alignment_check);
-#ifdef CONFIG_X86_MCE
-	set_trap_gate(18,&machine_check);
-#endif
-	set_trap_gate(19,&simd_coprocessor_error);
-
-	if (cpu_has_fxsr) {
-		/*
-		 * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned.
-		 * Generates a compile-time "error: zero width for bit-field" if
-		 * the alignment is wrong.
-		 */
-		struct fxsrAlignAssert {
-			int _:!(offsetof(struct task_struct,
-					thread.i387.fxsave) & 15);
-		};
-
-		printk(KERN_INFO "Enabling fast FPU save and restore... ");
-		set_in_cr4(X86_CR4_OSFXSR);
-		printk("done.\n");
-	}
-	if (cpu_has_xmm) {
-		printk(KERN_INFO "Enabling unmasked SIMD FPU exception "
-				"support... ");
-		set_in_cr4(X86_CR4_OSXMMEXCPT);
-		printk("done.\n");
-	}
-
-	set_system_gate(SYSCALL_VECTOR,&system_call);
-
-	/*
-	 * Should be a barrier for any external CPU state.
-	 */
-	cpu_init();
-
-	trap_init_hook();
-}
-
-static int __init kstack_setup(char *s)
-{
-	kstack_depth_to_print = simple_strtoul(s, NULL, 0);
-	return 1;
-}
-__setup("kstack=", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
-	code_bytes = simple_strtoul(s, NULL, 0);
-	if (code_bytes > 8192)
-		code_bytes = 8192;
-
-	return 1;
-}
-__setup("code_bytes=", code_bytes_setup);