2 * linux/arch/x86-64/traps.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
7 * Pentium III FXSR, SSE support
8 * Gareth Hughes <gareth@valinux.com>, May 2000
10 * $Id: traps.c,v 1.36 2002/03/24 11:09:10 ak Exp $
14 * 'Traps.c' handles hardware traps and faults after we have saved some
17 #include <linux/config.h>
18 #include <linux/sched.h>
19 #include <linux/kernel.h>
20 #include <linux/string.h>
21 #include <linux/errno.h>
22 #include <linux/ptrace.h>
23 #include <linux/timer.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/spinlock.h>
28 #include <linux/interrupt.h>
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/nmi.h>
33 #include <asm/system.h>
34 #include <asm/uaccess.h>
36 #include <asm/atomic.h>
37 #include <asm/debugreg.h>
40 #include <asm/kdebug.h>
41 #include <asm/processor.h>
44 #include <asm/pgalloc.h>
46 #include <asm/proto.h>
49 #include <linux/irq.h>
52 extern struct gate_struct idt_table[256];
54 asmlinkage void divide_error(void);
55 asmlinkage void debug(void);
56 asmlinkage void nmi(void);
57 asmlinkage void int3(void);
58 asmlinkage void overflow(void);
59 asmlinkage void bounds(void);
60 asmlinkage void invalid_op(void);
61 asmlinkage void device_not_available(void);
62 asmlinkage void double_fault(void);
63 asmlinkage void coprocessor_segment_overrun(void);
64 asmlinkage void invalid_TSS(void);
65 asmlinkage void segment_not_present(void);
66 asmlinkage void stack_segment(void);
67 asmlinkage void general_protection(void);
68 asmlinkage void page_fault(void);
69 asmlinkage void coprocessor_error(void);
70 asmlinkage void simd_coprocessor_error(void);
71 asmlinkage void reserved(void);
72 asmlinkage void alignment_check(void);
73 asmlinkage void machine_check(void);
74 asmlinkage void spurious_interrupt_bug(void);
75 asmlinkage void call_debug(void);
77 struct notifier_block *die_chain;
78 static DEFINE_SPINLOCK(die_notifier_lock);
80 int register_die_notifier(struct notifier_block *nb)
84 spin_lock_irqsave(&die_notifier_lock, flags);
85 err = notifier_chain_register(&die_chain, nb);
86 spin_unlock_irqrestore(&die_notifier_lock, flags);
90 static inline void conditional_sti(struct pt_regs *regs)
92 if (regs->eflags & X86_EFLAGS_IF)
96 static int kstack_depth_to_print = 10;
98 #ifdef CONFIG_KALLSYMS
99 #include <linux/kallsyms.h>
100 int printk_address(unsigned long address)
102 unsigned long offset = 0, symsize;
108 symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
110 return printk("[<%016lx>]", address);
112 modname = delim = "";
113 return printk("<%016lx>{%s%s%s%s%+ld}",
114 address,delim,modname,delim,symname,offset);
117 int printk_address(unsigned long address)
119 return printk("[<%016lx>]", address);
123 static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
124 unsigned *usedp, const char **idp)
126 static const char ids[N_EXCEPTION_STACKS][8] = {
127 [DEBUG_STACK - 1] = "#DB",
128 [NMI_STACK - 1] = "NMI",
129 [DOUBLEFAULT_STACK - 1] = "#DF",
130 [STACKFAULT_STACK - 1] = "#SS",
131 [MCE_STACK - 1] = "#MC",
135 for (k = 0; k < N_EXCEPTION_STACKS; k++) {
138 end = per_cpu(init_tss, cpu).ist[k];
141 if (stack >= end - EXCEPTION_STKSZ) {
142 if (*usedp & (1U << k))
146 return (unsigned long *)end;
153 * x86-64 can have upto three kernel stacks:
156 * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
159 void show_trace(unsigned long *stack)
162 const unsigned cpu = safe_smp_processor_id();
163 unsigned long *irqstack_end = (unsigned long *)cpu_pda[cpu].irqstackptr;
167 printk("\nCall Trace:");
169 #define HANDLE_STACK(cond) \
172 if (kernel_text_address(addr)) { \
174 * If the address is either in the text segment of the \
175 * kernel, or in the region which contains vmalloc'ed \
176 * memory, it *may* be the address of a calling \
177 * routine; if so, print it so that someone tracing \
178 * down the cause of the crash will be able to figure \
179 * out the call path that was taken. \
181 i += printk_address(addr); \
193 unsigned long *estack_end;
194 estack_end = in_exception_stack(cpu, (unsigned long)stack,
198 i += printk(" <%s> ", id);
199 HANDLE_STACK (stack < estack_end);
200 i += printk(" <EOE> ");
201 stack = (unsigned long *) estack_end[-2];
205 unsigned long *irqstack;
206 irqstack = irqstack_end -
207 (IRQSTACKSIZE - 64) / sizeof(*irqstack);
209 if (stack >= irqstack && stack < irqstack_end) {
210 i += printk(" <IRQ> ");
211 HANDLE_STACK (stack < irqstack_end);
212 stack = (unsigned long *) (irqstack_end[-1]);
214 i += printk(" <EOI> ");
221 HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
226 void show_stack(struct task_struct *tsk, unsigned long * rsp)
228 unsigned long *stack;
230 const int cpu = safe_smp_processor_id();
231 unsigned long *irqstack_end = (unsigned long *) (cpu_pda[cpu].irqstackptr);
232 unsigned long *irqstack = (unsigned long *) (cpu_pda[cpu].irqstackptr - IRQSTACKSIZE);
234 // debugging aid: "show_stack(NULL, NULL);" prints the
235 // back trace for this cpu.
239 rsp = (unsigned long *)tsk->thread.rsp;
241 rsp = (unsigned long *)&rsp;
245 for(i=0; i < kstack_depth_to_print; i++) {
246 if (stack >= irqstack && stack <= irqstack_end) {
247 if (stack == irqstack_end) {
248 stack = (unsigned long *) (irqstack_end[-1]);
252 if (((long) stack & (THREAD_SIZE-1)) == 0)
255 if (i && ((i % 4) == 0))
257 printk("%016lx ", *stack++);
258 touch_nmi_watchdog();
260 show_trace((unsigned long *)rsp);
264 * The architecture-independent dump_stack generator
266 void dump_stack(void)
272 EXPORT_SYMBOL(dump_stack);
274 void show_registers(struct pt_regs *regs)
277 int in_kernel = (regs->cs & 3) == 0;
279 const int cpu = safe_smp_processor_id();
280 struct task_struct *cur = cpu_pda[cpu].pcurrent;
284 printk("CPU %d ", cpu);
286 printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
287 cur->comm, cur->pid, cur->thread_info, cur);
290 * When in-kernel, we also print out the stack and code at the
291 * time of the fault..
296 show_stack(NULL, (unsigned long*)rsp);
299 if(regs->rip < PAGE_OFFSET)
305 if(__get_user(c, &((unsigned char*)regs->rip)[i])) {
307 printk(" Bad RIP value.");
316 void handle_BUG(struct pt_regs *regs)
323 if (__copy_from_user(&f, (struct bug_frame *) regs->rip,
324 sizeof(struct bug_frame)))
326 if ((unsigned long)f.filename < __PAGE_OFFSET ||
327 f.ud2[0] != 0x0f || f.ud2[1] != 0x0b)
329 if (__get_user(tmp, f.filename))
330 f.filename = "unmapped filename";
331 printk("----------- [cut here ] --------- [please bite here ] ---------\n");
332 printk(KERN_ALERT "Kernel BUG at %.50s:%d\n", f.filename, f.line);
336 void out_of_line_bug(void)
342 static DEFINE_SPINLOCK(die_lock);
343 static int die_owner = -1;
345 void oops_begin(void)
347 int cpu = safe_smp_processor_id();
348 /* racy, but better than risking deadlock. */
350 if (!spin_trylock(&die_lock)) {
351 if (cpu == die_owner)
352 /* nested oops. should stop eventually */;
354 spin_lock(&die_lock);
365 spin_unlock(&die_lock);
373 void __die(const char * str, struct pt_regs * regs, long err)
375 static int die_counter;
376 printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff,++die_counter);
377 #ifdef CONFIG_PREEMPT
383 #ifdef CONFIG_DEBUG_PAGEALLOC
384 printk("DEBUG_PAGEALLOC");
387 notify_die(DIE_OOPS, (char *)str, regs, err, 255, SIGSEGV);
388 show_registers(regs);
389 /* Executive summary in case the oops scrolled away */
390 printk(KERN_ALERT "RIP ");
391 printk_address(regs->rip);
392 printk(" RSP <%016lx>\n", regs->rsp);
395 void die(const char * str, struct pt_regs * regs, long err)
399 __die(str, regs, err);
404 static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err)
406 if (!(regs->eflags & VM_MASK) && (regs->cs == __KERNEL_CS))
410 void die_nmi(char *str, struct pt_regs *regs)
414 * We are in trouble anyway, lets at least try
415 * to get a message out.
417 printk(str, safe_smp_processor_id());
418 show_registers(regs);
419 if (panic_on_timeout || panic_on_oops)
420 panic("nmi watchdog");
421 printk("console shuts up ...\n");
426 static void do_trap(int trapnr, int signr, char *str,
427 struct pt_regs * regs, long error_code, siginfo_t *info)
429 conditional_sti(regs);
431 #ifdef CONFIG_CHECKING
434 struct x8664_pda *pda = cpu_pda + safe_smp_processor_id();
435 rdmsrl(MSR_GS_BASE, gs);
436 if (gs != (unsigned long)pda) {
437 wrmsrl(MSR_GS_BASE, pda);
438 printk("%s: wrong gs %lx expected %p rip %lx\n", str, gs, pda,
444 if ((regs->cs & 3) != 0) {
445 struct task_struct *tsk = current;
447 if (exception_trace && unhandled_signal(tsk, signr))
449 "%s[%d] trap %s rip:%lx rsp:%lx error:%lx\n",
450 tsk->comm, tsk->pid, str,
451 regs->rip,regs->rsp,error_code);
453 tsk->thread.error_code = error_code;
454 tsk->thread.trap_no = trapnr;
456 force_sig_info(signr, info, tsk);
458 force_sig(signr, tsk);
465 const struct exception_table_entry *fixup;
466 fixup = search_exception_tables(regs->rip);
468 regs->rip = fixup->fixup;
470 die(str, regs, error_code);
475 #define DO_ERROR(trapnr, signr, str, name) \
476 asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
478 if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
481 do_trap(trapnr, signr, str, regs, error_code, NULL); \
484 #define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
485 asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
488 info.si_signo = signr; \
490 info.si_code = sicode; \
491 info.si_addr = (void __user *)siaddr; \
492 if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
495 do_trap(trapnr, signr, str, regs, error_code, &info); \
498 DO_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->rip)
499 DO_ERROR( 4, SIGSEGV, "overflow", overflow)
500 DO_ERROR( 5, SIGSEGV, "bounds", bounds)
501 DO_ERROR_INFO( 6, SIGILL, "invalid operand", invalid_op, ILL_ILLOPN, regs->rip)
502 DO_ERROR( 7, SIGSEGV, "device not available", device_not_available)
503 DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
504 DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
505 DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
506 DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
507 DO_ERROR(18, SIGSEGV, "reserved", reserved)
508 DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
509 DO_ERROR( 8, SIGSEGV, "double fault", double_fault)
511 asmlinkage void do_general_protection(struct pt_regs * regs, long error_code)
513 conditional_sti(regs);
515 #ifdef CONFIG_CHECKING
518 struct x8664_pda *pda = cpu_pda + safe_smp_processor_id();
519 rdmsrl(MSR_GS_BASE, gs);
520 if (gs != (unsigned long)pda) {
521 wrmsrl(MSR_GS_BASE, pda);
523 printk("general protection handler: wrong gs %lx expected %p\n", gs, pda);
529 if ((regs->cs & 3)!=0) {
530 struct task_struct *tsk = current;
532 if (exception_trace && unhandled_signal(tsk, SIGSEGV))
534 "%s[%d] general protection rip:%lx rsp:%lx error:%lx\n",
536 regs->rip,regs->rsp,error_code);
538 tsk->thread.error_code = error_code;
539 tsk->thread.trap_no = 13;
540 force_sig(SIGSEGV, tsk);
546 const struct exception_table_entry *fixup;
547 fixup = search_exception_tables(regs->rip);
549 regs->rip = fixup->fixup;
552 if (notify_die(DIE_GPF, "general protection fault", regs,
553 error_code, 13, SIGSEGV) == NOTIFY_STOP)
555 die("general protection fault", regs, error_code);
559 static void mem_parity_error(unsigned char reason, struct pt_regs * regs)
561 printk("Uhhuh. NMI received. Dazed and confused, but trying to continue\n");
562 printk("You probably have a hardware problem with your RAM chips\n");
564 /* Clear and disable the memory parity error line. */
565 reason = (reason & 0xf) | 4;
569 static void io_check_error(unsigned char reason, struct pt_regs * regs)
571 printk("NMI: IOCK error (debug interrupt?)\n");
572 show_registers(regs);
574 /* Re-enable the IOCK line, wait for a few seconds */
575 reason = (reason & 0xf) | 8;
582 static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
583 { printk("Uhhuh. NMI received for unknown reason %02x.\n", reason);
584 printk("Dazed and confused, but trying to continue\n");
585 printk("Do you have a strange power saving mode enabled?\n");
588 /* Runs on IST stack. This code must keep interrupts off all the time.
589 Nested NMIs are prevented by the CPU. */
590 asmlinkage void default_do_nmi(struct pt_regs *regs)
592 unsigned char reason = 0;
594 /* Only the BSP gets external NMIs from the system. */
595 if (!smp_processor_id())
596 reason = get_nmi_reason();
598 if (!(reason & 0xc0)) {
599 if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 0, SIGINT)
602 #ifdef CONFIG_X86_LOCAL_APIC
604 * Ok, so this is none of the documented NMI sources,
605 * so it must be the NMI watchdog.
607 if (nmi_watchdog > 0) {
608 nmi_watchdog_tick(regs,reason);
612 unknown_nmi_error(reason, regs);
615 if (notify_die(DIE_NMI, "nmi", regs, reason, 0, SIGINT) == NOTIFY_STOP)
618 /* AK: following checks seem to be broken on modern chipsets. FIXME */
621 mem_parity_error(reason, regs);
623 io_check_error(reason, regs);
626 asmlinkage void do_int3(struct pt_regs * regs, long error_code)
628 if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) == NOTIFY_STOP) {
631 do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
635 /* Help handler running on IST stack to switch back to user stack
636 for scheduling or signal handling. The actual stack switch is done in
638 asmlinkage struct pt_regs *sync_regs(struct pt_regs *eregs)
640 struct pt_regs *regs = eregs;
641 /* Did already sync */
642 if (eregs == (struct pt_regs *)eregs->rsp)
644 /* Exception from user space */
645 else if (eregs->cs & 3)
646 regs = ((struct pt_regs *)current->thread.rsp0) - 1;
647 /* Exception from kernel and interrupts are enabled. Move to
648 kernel process stack. */
649 else if (eregs->eflags & X86_EFLAGS_IF)
650 regs = (struct pt_regs *)(eregs->rsp -= sizeof(struct pt_regs));
656 /* runs on IST stack. */
657 asmlinkage void do_debug(struct pt_regs * regs, unsigned long error_code)
659 unsigned long condition;
660 struct task_struct *tsk = current;
663 #ifdef CONFIG_CHECKING
665 /* RED-PEN interaction with debugger - could destroy gs */
667 struct x8664_pda *pda = cpu_pda + safe_smp_processor_id();
668 rdmsrl(MSR_GS_BASE, gs);
669 if (gs != (unsigned long)pda) {
670 wrmsrl(MSR_GS_BASE, pda);
671 printk("debug handler: wrong gs %lx expected %p\n", gs, pda);
676 asm("movq %%db6,%0" : "=r" (condition));
678 if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
679 SIGTRAP) == NOTIFY_STOP)
682 conditional_sti(regs);
684 /* Mask out spurious debug traps due to lazy DR7 setting */
685 if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
686 if (!tsk->thread.debugreg7) {
691 tsk->thread.debugreg6 = condition;
693 /* Mask out spurious TF errors due to lazy TF clearing */
694 if (condition & DR_STEP) {
696 * The TF error should be masked out only if the current
697 * process is not traced and if the TRAP flag has been set
698 * previously by a tracing process (condition detected by
699 * the PT_DTRACE flag); remember that the i386 TRAP flag
700 * can be modified by the process itself in user mode,
701 * allowing programs to debug themselves without the ptrace()
704 if ((regs->cs & 3) == 0)
705 goto clear_TF_reenable;
707 * Was the TF flag set by a debugger? If so, clear it now,
708 * so that register information is correct.
710 if (tsk->ptrace & PT_DTRACE) {
711 regs->eflags &= ~TF_MASK;
712 tsk->ptrace &= ~PT_DTRACE;
716 /* Ok, finally something we can handle */
717 tsk->thread.trap_no = 1;
718 tsk->thread.error_code = error_code;
719 info.si_signo = SIGTRAP;
721 info.si_code = TRAP_BRKPT;
722 if ((regs->cs & 3) == 0)
725 info.si_addr = (void __user *)regs->rip;
726 force_sig_info(SIGTRAP, &info, tsk);
728 asm volatile("movq %0,%%db7"::"r"(0UL));
732 set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
733 regs->eflags &= ~TF_MASK;
736 static int kernel_math_error(struct pt_regs *regs, char *str)
738 const struct exception_table_entry *fixup;
739 fixup = search_exception_tables(regs->rip);
741 regs->rip = fixup->fixup;
744 notify_die(DIE_GPF, str, regs, 0, 16, SIGFPE);
745 /* Illegal floating point operation in the kernel */
751 * Note that we play around with the 'TS' bit in an attempt to get
752 * the correct behaviour even in the presence of the asynchronous
755 asmlinkage void do_coprocessor_error(struct pt_regs *regs)
757 void __user *rip = (void __user *)(regs->rip);
758 struct task_struct * task;
760 unsigned short cwd, swd;
762 conditional_sti(regs);
763 if ((regs->cs & 3) == 0 &&
764 kernel_math_error(regs, "kernel x87 math error"))
768 * Save the info for the exception handler and clear the error.
772 task->thread.trap_no = 16;
773 task->thread.error_code = 0;
774 info.si_signo = SIGFPE;
776 info.si_code = __SI_FAULT;
779 * (~cwd & swd) will mask out exceptions that are not set to unmasked
780 * status. 0x3f is the exception bits in these regs, 0x200 is the
781 * C1 reg you need in case of a stack fault, 0x040 is the stack
782 * fault bit. We should only be taking one exception at a time,
783 * so if this combination doesn't produce any single exception,
784 * then we have a bad program that isn't synchronizing its FPU usage
785 * and it will suffer the consequences since we won't be able to
786 * fully reproduce the context of the exception
788 cwd = get_fpu_cwd(task);
789 swd = get_fpu_swd(task);
790 switch (((~cwd) & swd & 0x3f) | (swd & 0x240)) {
794 case 0x001: /* Invalid Op */
795 case 0x041: /* Stack Fault */
796 case 0x241: /* Stack Fault | Direction */
797 info.si_code = FPE_FLTINV;
799 case 0x002: /* Denormalize */
800 case 0x010: /* Underflow */
801 info.si_code = FPE_FLTUND;
803 case 0x004: /* Zero Divide */
804 info.si_code = FPE_FLTDIV;
806 case 0x008: /* Overflow */
807 info.si_code = FPE_FLTOVF;
809 case 0x020: /* Precision */
810 info.si_code = FPE_FLTRES;
813 force_sig_info(SIGFPE, &info, task);
816 asmlinkage void bad_intr(void)
818 printk("bad interrupt");
821 asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
823 void __user *rip = (void __user *)(regs->rip);
824 struct task_struct * task;
826 unsigned short mxcsr;
828 conditional_sti(regs);
829 if ((regs->cs & 3) == 0 &&
830 kernel_math_error(regs, "kernel simd math error"))
834 * Save the info for the exception handler and clear the error.
838 task->thread.trap_no = 19;
839 task->thread.error_code = 0;
840 info.si_signo = SIGFPE;
842 info.si_code = __SI_FAULT;
845 * The SIMD FPU exceptions are handled a little differently, as there
846 * is only a single status/control register. Thus, to determine which
847 * unmasked exception was caught we must mask the exception mask bits
848 * at 0x1f80, and then use these to mask the exception bits at 0x3f.
850 mxcsr = get_fpu_mxcsr(task);
851 switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
855 case 0x001: /* Invalid Op */
856 info.si_code = FPE_FLTINV;
858 case 0x002: /* Denormalize */
859 case 0x010: /* Underflow */
860 info.si_code = FPE_FLTUND;
862 case 0x004: /* Zero Divide */
863 info.si_code = FPE_FLTDIV;
865 case 0x008: /* Overflow */
866 info.si_code = FPE_FLTOVF;
868 case 0x020: /* Precision */
869 info.si_code = FPE_FLTRES;
872 force_sig_info(SIGFPE, &info, task);
875 asmlinkage void do_spurious_interrupt_bug(struct pt_regs * regs)
879 asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
884 * 'math_state_restore()' saves the current math information in the
885 * old math state array, and gets the new ones from the current task
887 * Careful.. There are problems with IBM-designed IRQ13 behaviour.
888 * Don't touch unless you *really* know how it works.
890 asmlinkage void math_state_restore(void)
892 struct task_struct *me = current;
893 clts(); /* Allow maths ops (or we recurse) */
897 restore_fpu_checking(&me->thread.i387.fxsave);
898 me->thread_info->status |= TS_USEDFPU;
901 void do_call_debug(struct pt_regs *regs)
903 notify_die(DIE_CALL, "debug call", regs, 0, 255, SIGINT);
906 void __init trap_init(void)
908 set_intr_gate(0,÷_error);
909 set_intr_gate_ist(1,&debug,DEBUG_STACK);
910 set_intr_gate_ist(2,&nmi,NMI_STACK);
911 set_system_gate(3,&int3);
912 set_system_gate(4,&overflow); /* int4-5 can be called from all */
913 set_system_gate(5,&bounds);
914 set_intr_gate(6,&invalid_op);
915 set_intr_gate(7,&device_not_available);
916 set_intr_gate_ist(8,&double_fault, DOUBLEFAULT_STACK);
917 set_intr_gate(9,&coprocessor_segment_overrun);
918 set_intr_gate(10,&invalid_TSS);
919 set_intr_gate(11,&segment_not_present);
920 set_intr_gate_ist(12,&stack_segment,STACKFAULT_STACK);
921 set_intr_gate(13,&general_protection);
922 set_intr_gate(14,&page_fault);
923 set_intr_gate(15,&spurious_interrupt_bug);
924 set_intr_gate(16,&coprocessor_error);
925 set_intr_gate(17,&alignment_check);
926 #ifdef CONFIG_X86_MCE
927 set_intr_gate_ist(18,&machine_check, MCE_STACK);
929 set_intr_gate(19,&simd_coprocessor_error);
931 #ifdef CONFIG_IA32_EMULATION
932 set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
935 set_intr_gate(KDB_VECTOR, call_debug);
938 * Should be a barrier for any external CPU state.
944 /* Actual parsing is done early in setup.c. */
945 static int __init oops_dummy(char *s)
950 __setup("oops=", oops_dummy);
952 static int __init kstack_setup(char *s)
954 kstack_depth_to_print = simple_strtoul(s,NULL,0);
957 __setup("kstack=", kstack_setup);