traps.c (d834a9dcecae834cd6b2bc5e50e1907738d9cf6a) traps.c (5dc3055879b8f659f62abb7c3d1eaa4d02e36d65)
1/*
2 * Copyright (C) 1991, 1992 Linus Torvalds
3 * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
4 *
5 * Pentium III FXSR, SSE support
6 * Gareth Hughes <gareth@valinux.com>, May 2000
7 */
8

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78gate_desc idt_table[NR_VECTORS] __page_aligned_data = { { { { 0, 0 } } }, };
79#endif
80
81DECLARE_BITMAP(used_vectors, NR_VECTORS);
82EXPORT_SYMBOL_GPL(used_vectors);
83
84static int ignore_nmis;
85
1/*
2 * Copyright (C) 1991, 1992 Linus Torvalds
3 * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
4 *
5 * Pentium III FXSR, SSE support
6 * Gareth Hughes <gareth@valinux.com>, May 2000
7 */
8

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78gate_desc idt_table[NR_VECTORS] __page_aligned_data = { { { { 0, 0 } } }, };
79#endif
80
81DECLARE_BITMAP(used_vectors, NR_VECTORS);
82EXPORT_SYMBOL_GPL(used_vectors);
83
84static int ignore_nmis;
85
86int unknown_nmi_panic;
87
86static inline void conditional_sti(struct pt_regs *regs)
87{
88 if (regs->flags & X86_EFLAGS_IF)
89 local_irq_enable();
90}
91
92static inline void preempt_conditional_sti(struct pt_regs *regs)
93{

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295 tsk->thread.error_code = error_code;
296 tsk->thread.trap_no = 13;
297 if (notify_die(DIE_GPF, "general protection fault", regs,
298 error_code, 13, SIGSEGV) == NOTIFY_STOP)
299 return;
300 die("general protection fault", regs, error_code);
301}
302
88static inline void conditional_sti(struct pt_regs *regs)
89{
90 if (regs->flags & X86_EFLAGS_IF)
91 local_irq_enable();
92}
93
94static inline void preempt_conditional_sti(struct pt_regs *regs)
95{

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297 tsk->thread.error_code = error_code;
298 tsk->thread.trap_no = 13;
299 if (notify_die(DIE_GPF, "general protection fault", regs,
300 error_code, 13, SIGSEGV) == NOTIFY_STOP)
301 return;
302 die("general protection fault", regs, error_code);
303}
304
305static int __init setup_unknown_nmi_panic(char *str)
306{
307 unknown_nmi_panic = 1;
308 return 1;
309}
310__setup("unknown_nmi_panic", setup_unknown_nmi_panic);
311
303static notrace __kprobes void
304mem_parity_error(unsigned char reason, struct pt_regs *regs)
305{
306 printk(KERN_EMERG
307 "Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
308 reason, smp_processor_id());
309
310 printk(KERN_EMERG

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366 return;
367 }
368#endif
369 printk(KERN_EMERG
370 "Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
371 reason, smp_processor_id());
372
373 printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
312static notrace __kprobes void
313mem_parity_error(unsigned char reason, struct pt_regs *regs)
314{
315 printk(KERN_EMERG
316 "Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
317 reason, smp_processor_id());
318
319 printk(KERN_EMERG

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375 return;
376 }
377#endif
378 printk(KERN_EMERG
379 "Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
380 reason, smp_processor_id());
381
382 printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
374 if (panic_on_unrecovered_nmi)
383 if (unknown_nmi_panic || panic_on_unrecovered_nmi)
375 panic("NMI: Not continuing");
376
377 printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
378}
379
380static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
381{
382 unsigned char reason = 0;

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392 if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
393 == NOTIFY_STOP)
394 return;
395
396#ifdef CONFIG_X86_LOCAL_APIC
397 if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT)
398 == NOTIFY_STOP)
399 return;
384 panic("NMI: Not continuing");
385
386 printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
387}
388
389static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
390{
391 unsigned char reason = 0;

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401 if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
402 == NOTIFY_STOP)
403 return;
404
405#ifdef CONFIG_X86_LOCAL_APIC
406 if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT)
407 == NOTIFY_STOP)
408 return;
400
401#ifndef CONFIG_LOCKUP_DETECTOR
402 /*
403 * Ok, so this is none of the documented NMI sources,
404 * so it must be the NMI watchdog.
405 */
406 if (nmi_watchdog_tick(regs, reason))
407 return;
408 if (!do_nmi_callback(regs, cpu))
409#endif /* !CONFIG_LOCKUP_DETECTOR */
410 unknown_nmi_error(reason, regs);
411#else
412 unknown_nmi_error(reason, regs);
413#endif
409#endif
410 unknown_nmi_error(reason, regs);
414
415 return;
416 }
417 if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
418 return;
419
420 /* AK: following checks seem to be broken on modern chipsets. FIXME */
421 if (reason & 0x80)

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441 if (!ignore_nmis)
442 default_do_nmi(regs);
443
444 nmi_exit();
445}
446
447void stop_nmi(void)
448{
411
412 return;
413 }
414 if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
415 return;
416
417 /* AK: following checks seem to be broken on modern chipsets. FIXME */
418 if (reason & 0x80)

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438 if (!ignore_nmis)
439 default_do_nmi(regs);
440
441 nmi_exit();
442}
443
444void stop_nmi(void)
445{
449 acpi_nmi_disable();
450 ignore_nmis++;
451}
452
453void restart_nmi(void)
454{
455 ignore_nmis--;
446 ignore_nmis++;
447}
448
449void restart_nmi(void)
450{
451 ignore_nmis--;
456 acpi_nmi_enable();
457}
458
459/* May run on IST stack. */
460dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
461{
462#ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
463 if (kgdb_ll_trap(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
464 == NOTIFY_STOP)

--- 420 unchanged lines hidden --- 		452}
453
454/* May run on IST stack. */
455dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
456{
457#ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
458 if (kgdb_ll_trap(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
459 == NOTIFY_STOP)

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