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>
32 #include <linux/kprobes.h>
34 #include <asm/system.h>
35 #include <asm/uaccess.h>
37 #include <asm/atomic.h>
38 #include <asm/debugreg.h>
41 #include <asm/kdebug.h>
42 #include <asm/processor.h>
45 #include <asm/pgalloc.h>
47 #include <asm/proto.h>
50 extern struct gate_struct idt_table[256];
52 asmlinkage void divide_error(void);
53 asmlinkage void debug(void);
54 asmlinkage void nmi(void);
55 asmlinkage void int3(void);
56 asmlinkage void overflow(void);
57 asmlinkage void bounds(void);
58 asmlinkage void invalid_op(void);
59 asmlinkage void device_not_available(void);
60 asmlinkage void double_fault(void);
61 asmlinkage void coprocessor_segment_overrun(void);
62 asmlinkage void invalid_TSS(void);
63 asmlinkage void segment_not_present(void);
64 asmlinkage void stack_segment(void);
65 asmlinkage void general_protection(void);
66 asmlinkage void page_fault(void);
67 asmlinkage void coprocessor_error(void);
68 asmlinkage void simd_coprocessor_error(void);
69 asmlinkage void reserved(void);
70 asmlinkage void alignment_check(void);
71 asmlinkage void machine_check(void);
72 asmlinkage void spurious_interrupt_bug(void);
74 struct notifier_block *die_chain;
75 static DEFINE_SPINLOCK(die_notifier_lock);
77 int register_die_notifier(struct notifier_block *nb)
81 spin_lock_irqsave(&die_notifier_lock, flags);
82 err = notifier_chain_register(&die_chain, nb);
83 spin_unlock_irqrestore(&die_notifier_lock, flags);
87 static inline void conditional_sti(struct pt_regs *regs)
89 if (regs->eflags & X86_EFLAGS_IF)
93 static int kstack_depth_to_print = 10;
95 #ifdef CONFIG_KALLSYMS
96 #include <linux/kallsyms.h>
97 int printk_address(unsigned long address)
99 unsigned long offset = 0, symsize;
105 symname = kallsyms_lookup(address, &symsize, &offset, &modname, namebuf);
107 return printk("[<%016lx>]", address);
109 modname = delim = "";
110 return printk("<%016lx>{%s%s%s%s%+ld}",
111 address,delim,modname,delim,symname,offset);
114 int printk_address(unsigned long address)
116 return printk("[<%016lx>]", address);
120 static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
121 unsigned *usedp, const char **idp)
123 static char ids[][8] = {
124 [DEBUG_STACK - 1] = "#DB",
125 [NMI_STACK - 1] = "NMI",
126 [DOUBLEFAULT_STACK - 1] = "#DF",
127 [STACKFAULT_STACK - 1] = "#SS",
128 [MCE_STACK - 1] = "#MC",
129 #if DEBUG_STKSZ > EXCEPTION_STKSZ
130 [N_EXCEPTION_STACKS ... N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
135 for (k = 0; k < N_EXCEPTION_STACKS; k++) {
139 #if DEBUG_STKSZ > EXCEPTION_STKSZ
141 end = cpu_pda(cpu)->debugstack + DEBUG_STKSZ;
145 end = per_cpu(init_tss, cpu).ist[k];
150 if (stack >= end - EXCEPTION_STKSZ) {
151 if (*usedp & (1U << k))
155 return (unsigned long *)end;
157 #if DEBUG_STKSZ > EXCEPTION_STKSZ
158 if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
159 unsigned j = N_EXCEPTION_STACKS - 1;
163 end -= EXCEPTION_STKSZ;
164 ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
165 } while (stack < end - EXCEPTION_STKSZ);
166 if (*usedp & (1U << j))
170 return (unsigned long *)end;
178 * x86-64 can have upto three kernel stacks:
181 * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
184 void show_trace(unsigned long *stack)
187 const unsigned cpu = safe_smp_processor_id();
188 unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
192 printk("\nCall Trace:");
194 #define HANDLE_STACK(cond) \
197 if (kernel_text_address(addr)) { \
199 * If the address is either in the text segment of the \
200 * kernel, or in the region which contains vmalloc'ed \
201 * memory, it *may* be the address of a calling \
202 * routine; if so, print it so that someone tracing \
203 * down the cause of the crash will be able to figure \
204 * out the call path that was taken. \
206 i += printk_address(addr); \
218 unsigned long *estack_end;
219 estack_end = in_exception_stack(cpu, (unsigned long)stack,
223 i += printk(" <%s> ", id);
224 HANDLE_STACK (stack < estack_end);
225 i += printk(" <EOE> ");
226 stack = (unsigned long *) estack_end[-2];
230 unsigned long *irqstack;
231 irqstack = irqstack_end -
232 (IRQSTACKSIZE - 64) / sizeof(*irqstack);
234 if (stack >= irqstack && stack < irqstack_end) {
235 i += printk(" <IRQ> ");
236 HANDLE_STACK (stack < irqstack_end);
237 stack = (unsigned long *) (irqstack_end[-1]);
239 i += printk(" <EOI> ");
246 HANDLE_STACK (((long) stack & (THREAD_SIZE-1)) != 0);
251 void show_stack(struct task_struct *tsk, unsigned long * rsp)
253 unsigned long *stack;
255 const int cpu = safe_smp_processor_id();
256 unsigned long *irqstack_end = (unsigned long *) (cpu_pda(cpu)->irqstackptr);
257 unsigned long *irqstack = (unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
259 // debugging aid: "show_stack(NULL, NULL);" prints the
260 // back trace for this cpu.
264 rsp = (unsigned long *)tsk->thread.rsp;
266 rsp = (unsigned long *)&rsp;
270 for(i=0; i < kstack_depth_to_print; i++) {
271 if (stack >= irqstack && stack <= irqstack_end) {
272 if (stack == irqstack_end) {
273 stack = (unsigned long *) (irqstack_end[-1]);
277 if (((long) stack & (THREAD_SIZE-1)) == 0)
280 if (i && ((i % 4) == 0))
282 printk("%016lx ", *stack++);
283 touch_nmi_watchdog();
285 show_trace((unsigned long *)rsp);
289 * The architecture-independent dump_stack generator
291 void dump_stack(void)
297 EXPORT_SYMBOL(dump_stack);
299 void show_registers(struct pt_regs *regs)
302 int in_kernel = !user_mode(regs);
304 const int cpu = safe_smp_processor_id();
305 struct task_struct *cur = cpu_pda(cpu)->pcurrent;
309 printk("CPU %d ", cpu);
311 printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
312 cur->comm, cur->pid, cur->thread_info, cur);
315 * When in-kernel, we also print out the stack and code at the
316 * time of the fault..
321 show_stack(NULL, (unsigned long*)rsp);
324 if(regs->rip < PAGE_OFFSET)
330 if(__get_user(c, &((unsigned char*)regs->rip)[i])) {
332 printk(" Bad RIP value.");
341 void handle_BUG(struct pt_regs *regs)
348 if (__copy_from_user(&f, (struct bug_frame *) regs->rip,
349 sizeof(struct bug_frame)))
351 if (f.filename >= 0 ||
352 f.ud2[0] != 0x0f || f.ud2[1] != 0x0b)
354 if (__get_user(tmp, (char *)(long)f.filename))
355 f.filename = (int)(long)"unmapped filename";
356 printk("----------- [cut here ] --------- [please bite here ] ---------\n");
357 printk(KERN_ALERT "Kernel BUG at %.50s:%d\n", (char *)(long)f.filename, f.line);
361 void out_of_line_bug(void)
367 static DEFINE_SPINLOCK(die_lock);
368 static int die_owner = -1;
370 unsigned long oops_begin(void)
372 int cpu = safe_smp_processor_id();
375 /* racy, but better than risking deadlock. */
376 local_irq_save(flags);
377 if (!spin_trylock(&die_lock)) {
378 if (cpu == die_owner)
379 /* nested oops. should stop eventually */;
381 spin_lock(&die_lock);
389 void oops_end(unsigned long flags)
393 spin_unlock_irqrestore(&die_lock, flags);
398 void __die(const char * str, struct pt_regs * regs, long err)
400 static int die_counter;
401 printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff,++die_counter);
402 #ifdef CONFIG_PREEMPT
408 #ifdef CONFIG_DEBUG_PAGEALLOC
409 printk("DEBUG_PAGEALLOC");
412 notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV);
413 show_registers(regs);
414 /* Executive summary in case the oops scrolled away */
415 printk(KERN_ALERT "RIP ");
416 printk_address(regs->rip);
417 printk(" RSP <%016lx>\n", regs->rsp);
420 void die(const char * str, struct pt_regs * regs, long err)
422 unsigned long flags = oops_begin();
425 __die(str, regs, err);
430 void die_nmi(char *str, struct pt_regs *regs)
432 unsigned long flags = oops_begin();
435 * We are in trouble anyway, lets at least try
436 * to get a message out.
438 printk(str, safe_smp_processor_id());
439 show_registers(regs);
440 if (panic_on_timeout || panic_on_oops)
441 panic("nmi watchdog");
442 printk("console shuts up ...\n");
447 static void __kprobes do_trap(int trapnr, int signr, char *str,
448 struct pt_regs * regs, long error_code,
451 struct task_struct *tsk = current;
453 conditional_sti(regs);
455 tsk->thread.error_code = error_code;
456 tsk->thread.trap_no = trapnr;
458 if (user_mode(regs)) {
459 if (exception_trace && unhandled_signal(tsk, signr))
461 "%s[%d] trap %s rip:%lx rsp:%lx error:%lx\n",
462 tsk->comm, tsk->pid, str,
463 regs->rip,regs->rsp,error_code);
466 force_sig_info(signr, info, tsk);
468 force_sig(signr, tsk);
475 const struct exception_table_entry *fixup;
476 fixup = search_exception_tables(regs->rip);
478 regs->rip = fixup->fixup;
480 die(str, regs, error_code);
485 #define DO_ERROR(trapnr, signr, str, name) \
486 asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
488 if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
491 do_trap(trapnr, signr, str, regs, error_code, NULL); \
494 #define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \
495 asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
498 info.si_signo = signr; \
500 info.si_code = sicode; \
501 info.si_addr = (void __user *)siaddr; \
502 if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr) \
505 do_trap(trapnr, signr, str, regs, error_code, &info); \
508 DO_ERROR_INFO( 0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->rip)
509 DO_ERROR( 4, SIGSEGV, "overflow", overflow)
510 DO_ERROR( 5, SIGSEGV, "bounds", bounds)
511 DO_ERROR_INFO( 6, SIGILL, "invalid operand", invalid_op, ILL_ILLOPN, regs->rip)
512 DO_ERROR( 7, SIGSEGV, "device not available", device_not_available)
513 DO_ERROR( 9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
514 DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
515 DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
516 DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
517 DO_ERROR(18, SIGSEGV, "reserved", reserved)
518 DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
520 asmlinkage void do_double_fault(struct pt_regs * regs, long error_code)
522 static const char str[] = "double fault";
523 struct task_struct *tsk = current;
525 /* Return not checked because double check cannot be ignored */
526 notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
528 tsk->thread.error_code = error_code;
529 tsk->thread.trap_no = 8;
531 /* This is always a kernel trap and never fixable (and thus must
534 die(str, regs, error_code);
537 asmlinkage void __kprobes do_general_protection(struct pt_regs * regs,
540 struct task_struct *tsk = current;
542 conditional_sti(regs);
544 tsk->thread.error_code = error_code;
545 tsk->thread.trap_no = 13;
547 if (user_mode(regs)) {
548 if (exception_trace && unhandled_signal(tsk, SIGSEGV))
550 "%s[%d] general protection rip:%lx rsp:%lx error:%lx\n",
552 regs->rip,regs->rsp,error_code);
554 force_sig(SIGSEGV, tsk);
560 const struct exception_table_entry *fixup;
561 fixup = search_exception_tables(regs->rip);
563 regs->rip = fixup->fixup;
566 if (notify_die(DIE_GPF, "general protection fault", regs,
567 error_code, 13, SIGSEGV) == NOTIFY_STOP)
569 die("general protection fault", regs, error_code);
573 static void mem_parity_error(unsigned char reason, struct pt_regs * regs)
575 printk("Uhhuh. NMI received. Dazed and confused, but trying to continue\n");
576 printk("You probably have a hardware problem with your RAM chips\n");
578 /* Clear and disable the memory parity error line. */
579 reason = (reason & 0xf) | 4;
583 static void io_check_error(unsigned char reason, struct pt_regs * regs)
585 printk("NMI: IOCK error (debug interrupt?)\n");
586 show_registers(regs);
588 /* Re-enable the IOCK line, wait for a few seconds */
589 reason = (reason & 0xf) | 8;
596 static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
597 { printk("Uhhuh. NMI received for unknown reason %02x.\n", reason);
598 printk("Dazed and confused, but trying to continue\n");
599 printk("Do you have a strange power saving mode enabled?\n");
602 /* Runs on IST stack. This code must keep interrupts off all the time.
603 Nested NMIs are prevented by the CPU. */
604 asmlinkage void default_do_nmi(struct pt_regs *regs)
606 unsigned char reason = 0;
609 cpu = smp_processor_id();
611 /* Only the BSP gets external NMIs from the system. */
613 reason = get_nmi_reason();
615 if (!(reason & 0xc0)) {
616 if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
619 #ifdef CONFIG_X86_LOCAL_APIC
621 * Ok, so this is none of the documented NMI sources,
622 * so it must be the NMI watchdog.
624 if (nmi_watchdog > 0) {
625 nmi_watchdog_tick(regs,reason);
629 unknown_nmi_error(reason, regs);
632 if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
635 /* AK: following checks seem to be broken on modern chipsets. FIXME */
638 mem_parity_error(reason, regs);
640 io_check_error(reason, regs);
643 /* runs on IST stack. */
644 asmlinkage void __kprobes do_int3(struct pt_regs * regs, long error_code)
646 if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) == NOTIFY_STOP) {
649 do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
653 /* Help handler running on IST stack to switch back to user stack
654 for scheduling or signal handling. The actual stack switch is done in
656 asmlinkage struct pt_regs *sync_regs(struct pt_regs *eregs)
658 struct pt_regs *regs = eregs;
659 /* Did already sync */
660 if (eregs == (struct pt_regs *)eregs->rsp)
662 /* Exception from user space */
663 else if (user_mode(eregs))
664 regs = ((struct pt_regs *)current->thread.rsp0) - 1;
665 /* Exception from kernel and interrupts are enabled. Move to
666 kernel process stack. */
667 else if (eregs->eflags & X86_EFLAGS_IF)
668 regs = (struct pt_regs *)(eregs->rsp -= sizeof(struct pt_regs));
674 /* runs on IST stack. */
675 asmlinkage void __kprobes do_debug(struct pt_regs * regs,
676 unsigned long error_code)
678 unsigned long condition;
679 struct task_struct *tsk = current;
682 get_debugreg(condition, 6);
684 if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
685 SIGTRAP) == NOTIFY_STOP)
688 conditional_sti(regs);
690 /* Mask out spurious debug traps due to lazy DR7 setting */
691 if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
692 if (!tsk->thread.debugreg7) {
697 tsk->thread.debugreg6 = condition;
699 /* Mask out spurious TF errors due to lazy TF clearing */
700 if (condition & DR_STEP) {
702 * The TF error should be masked out only if the current
703 * process is not traced and if the TRAP flag has been set
704 * previously by a tracing process (condition detected by
705 * the PT_DTRACE flag); remember that the i386 TRAP flag
706 * can be modified by the process itself in user mode,
707 * allowing programs to debug themselves without the ptrace()
710 if (!user_mode(regs))
711 goto clear_TF_reenable;
713 * Was the TF flag set by a debugger? If so, clear it now,
714 * so that register information is correct.
716 if (tsk->ptrace & PT_DTRACE) {
717 regs->eflags &= ~TF_MASK;
718 tsk->ptrace &= ~PT_DTRACE;
722 /* Ok, finally something we can handle */
723 tsk->thread.trap_no = 1;
724 tsk->thread.error_code = error_code;
725 info.si_signo = SIGTRAP;
727 info.si_code = TRAP_BRKPT;
728 info.si_addr = user_mode(regs) ? (void __user *)regs->rip : NULL;
729 force_sig_info(SIGTRAP, &info, tsk);
732 set_debugreg(0UL, 7);
736 set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
737 regs->eflags &= ~TF_MASK;
740 static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
742 const struct exception_table_entry *fixup;
743 fixup = search_exception_tables(regs->rip);
745 regs->rip = fixup->fixup;
748 notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
749 /* Illegal floating point operation in the kernel */
750 current->thread.trap_no = trapnr;
756 * Note that we play around with the 'TS' bit in an attempt to get
757 * the correct behaviour even in the presence of the asynchronous
760 asmlinkage void do_coprocessor_error(struct pt_regs *regs)
762 void __user *rip = (void __user *)(regs->rip);
763 struct task_struct * task;
765 unsigned short cwd, swd;
767 conditional_sti(regs);
768 if (!user_mode(regs) &&
769 kernel_math_error(regs, "kernel x87 math error", 16))
773 * Save the info for the exception handler and clear the error.
777 task->thread.trap_no = 16;
778 task->thread.error_code = 0;
779 info.si_signo = SIGFPE;
781 info.si_code = __SI_FAULT;
784 * (~cwd & swd) will mask out exceptions that are not set to unmasked
785 * status. 0x3f is the exception bits in these regs, 0x200 is the
786 * C1 reg you need in case of a stack fault, 0x040 is the stack
787 * fault bit. We should only be taking one exception at a time,
788 * so if this combination doesn't produce any single exception,
789 * then we have a bad program that isn't synchronizing its FPU usage
790 * and it will suffer the consequences since we won't be able to
791 * fully reproduce the context of the exception
793 cwd = get_fpu_cwd(task);
794 swd = get_fpu_swd(task);
795 switch (swd & ~cwd & 0x3f) {
799 case 0x001: /* Invalid Op */
801 * swd & 0x240 == 0x040: Stack Underflow
802 * swd & 0x240 == 0x240: Stack Overflow
803 * User must clear the SF bit (0x40) if set
805 info.si_code = FPE_FLTINV;
807 case 0x002: /* Denormalize */
808 case 0x010: /* Underflow */
809 info.si_code = FPE_FLTUND;
811 case 0x004: /* Zero Divide */
812 info.si_code = FPE_FLTDIV;
814 case 0x008: /* Overflow */
815 info.si_code = FPE_FLTOVF;
817 case 0x020: /* Precision */
818 info.si_code = FPE_FLTRES;
821 force_sig_info(SIGFPE, &info, task);
824 asmlinkage void bad_intr(void)
826 printk("bad interrupt");
829 asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
831 void __user *rip = (void __user *)(regs->rip);
832 struct task_struct * task;
834 unsigned short mxcsr;
836 conditional_sti(regs);
837 if (!user_mode(regs) &&
838 kernel_math_error(regs, "kernel simd math error", 19))
842 * Save the info for the exception handler and clear the error.
846 task->thread.trap_no = 19;
847 task->thread.error_code = 0;
848 info.si_signo = SIGFPE;
850 info.si_code = __SI_FAULT;
853 * The SIMD FPU exceptions are handled a little differently, as there
854 * is only a single status/control register. Thus, to determine which
855 * unmasked exception was caught we must mask the exception mask bits
856 * at 0x1f80, and then use these to mask the exception bits at 0x3f.
858 mxcsr = get_fpu_mxcsr(task);
859 switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
863 case 0x001: /* Invalid Op */
864 info.si_code = FPE_FLTINV;
866 case 0x002: /* Denormalize */
867 case 0x010: /* Underflow */
868 info.si_code = FPE_FLTUND;
870 case 0x004: /* Zero Divide */
871 info.si_code = FPE_FLTDIV;
873 case 0x008: /* Overflow */
874 info.si_code = FPE_FLTOVF;
876 case 0x020: /* Precision */
877 info.si_code = FPE_FLTRES;
880 force_sig_info(SIGFPE, &info, task);
883 asmlinkage void do_spurious_interrupt_bug(struct pt_regs * regs)
887 asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
891 asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
896 * 'math_state_restore()' saves the current math information in the
897 * old math state array, and gets the new ones from the current task
899 * Careful.. There are problems with IBM-designed IRQ13 behaviour.
900 * Don't touch unless you *really* know how it works.
902 asmlinkage void math_state_restore(void)
904 struct task_struct *me = current;
905 clts(); /* Allow maths ops (or we recurse) */
909 restore_fpu_checking(&me->thread.i387.fxsave);
910 me->thread_info->status |= TS_USEDFPU;
913 void do_call_debug(struct pt_regs *regs)
915 notify_die(DIE_CALL, "debug call", regs, 0, 255, SIGINT);
918 void __init trap_init(void)
920 set_intr_gate(0,÷_error);
921 set_intr_gate_ist(1,&debug,DEBUG_STACK);
922 set_intr_gate_ist(2,&nmi,NMI_STACK);
923 set_system_gate_ist(3,&int3,DEBUG_STACK); /* int3 can be called from all */
924 set_system_gate(4,&overflow); /* int4 can be called from all */
925 set_intr_gate(5,&bounds);
926 set_intr_gate(6,&invalid_op);
927 set_intr_gate(7,&device_not_available);
928 set_intr_gate_ist(8,&double_fault, DOUBLEFAULT_STACK);
929 set_intr_gate(9,&coprocessor_segment_overrun);
930 set_intr_gate(10,&invalid_TSS);
931 set_intr_gate(11,&segment_not_present);
932 set_intr_gate_ist(12,&stack_segment,STACKFAULT_STACK);
933 set_intr_gate(13,&general_protection);
934 set_intr_gate(14,&page_fault);
935 set_intr_gate(15,&spurious_interrupt_bug);
936 set_intr_gate(16,&coprocessor_error);
937 set_intr_gate(17,&alignment_check);
938 #ifdef CONFIG_X86_MCE
939 set_intr_gate_ist(18,&machine_check, MCE_STACK);
941 set_intr_gate(19,&simd_coprocessor_error);
943 #ifdef CONFIG_IA32_EMULATION
944 set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
947 set_intr_gate(KDB_VECTOR, call_debug);
950 * Should be a barrier for any external CPU state.
956 /* Actual parsing is done early in setup.c. */
957 static int __init oops_dummy(char *s)
962 __setup("oops=", oops_dummy);
964 static int __init kstack_setup(char *s)
966 kstack_depth_to_print = simple_strtoul(s,NULL,0);
969 __setup("kstack=", kstack_setup);