traps.c (fba961ab29e5ffb055592442808bb0f7962e05da) traps.c (ed1bbc40a0d10e0c5c74fe7bdc6298295cf40255)
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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37#include <linux/mm.h>
38#include <linux/smp.h>
39#include <linux/io.h>
40
41#if defined(CONFIG_EDAC)
42#include <linux/edac.h>
43#endif
44
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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37#include <linux/mm.h>
38#include <linux/smp.h>
39#include <linux/io.h>
40
41#if defined(CONFIG_EDAC)
42#include <linux/edac.h>
43#endif
44
45#include <asm/kmemcheck.h>
45#include <asm/stacktrace.h>
46#include <asm/processor.h>
47#include <asm/debugreg.h>
48#include <linux/atomic.h>
49#include <asm/text-patching.h>
50#include <asm/ftrace.h>
51#include <asm/traps.h>
52#include <asm/desc.h>
53#include <asm/fpu/internal.h>
46#include <asm/stacktrace.h>
47#include <asm/processor.h>
48#include <asm/debugreg.h>
49#include <linux/atomic.h>
50#include <asm/text-patching.h>
51#include <asm/ftrace.h>
52#include <asm/traps.h>
53#include <asm/desc.h>
54#include <asm/fpu/internal.h>
55#include <asm/cpu_entry_area.h>
54#include <asm/mce.h>
55#include <asm/fixmap.h>
56#include <asm/mach_traps.h>
57#include <asm/alternative.h>
58#include <asm/fpu/xstate.h>
59#include <asm/trace/mpx.h>
60#include <asm/mpx.h>
61#include <asm/vm86.h>
56#include <asm/mce.h>
57#include <asm/fixmap.h>
58#include <asm/mach_traps.h>
59#include <asm/alternative.h>
60#include <asm/fpu/xstate.h>
61#include <asm/trace/mpx.h>
62#include <asm/mpx.h>
63#include <asm/vm86.h>
62#include <asm/umip.h>
63
64#ifdef CONFIG_X86_64
65#include <asm/x86_init.h>
66#include <asm/pgalloc.h>
67#include <asm/proto.h>
68#else
69#include <asm/processor-flags.h>
70#include <asm/setup.h>
71#include <asm/proto.h>
72#endif
73
64
65#ifdef CONFIG_X86_64
66#include <asm/x86_init.h>
67#include <asm/pgalloc.h>
68#include <asm/proto.h>
69#else
70#include <asm/processor-flags.h>
71#include <asm/setup.h>
72#include <asm/proto.h>
73#endif
74
74DECLARE_BITMAP(system_vectors, NR_VECTORS);
75DECLARE_BITMAP(used_vectors, NR_VECTORS);
75
76static inline void cond_local_irq_enable(struct pt_regs *regs)
77{
78 if (regs->flags & X86_EFLAGS_IF)
79 local_irq_enable();
80}
81
82static inline void cond_local_irq_disable(struct pt_regs *regs)

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531dotraplinkage void
532do_general_protection(struct pt_regs *regs, long error_code)
533{
534 struct task_struct *tsk;
535
536 RCU_LOCKDEP_WARN(!rcu_is_watching(), "entry code didn't wake RCU");
537 cond_local_irq_enable(regs);
538
76
77static inline void cond_local_irq_enable(struct pt_regs *regs)
78{
79 if (regs->flags & X86_EFLAGS_IF)
80 local_irq_enable();
81}
82
83static inline void cond_local_irq_disable(struct pt_regs *regs)

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532dotraplinkage void
533do_general_protection(struct pt_regs *regs, long error_code)
534{
535 struct task_struct *tsk;
536
537 RCU_LOCKDEP_WARN(!rcu_is_watching(), "entry code didn't wake RCU");
538 cond_local_irq_enable(regs);
539
539 if (static_cpu_has(X86_FEATURE_UMIP)) {
540 if (user_mode(regs) && fixup_umip_exception(regs))
541 return;
542 }
543
544 if (v8086_mode(regs)) {
545 local_irq_enable();
546 handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
547 return;
548 }
549
550 tsk = current;
551 if (!user_mode(regs)) {

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763 /*
764 * If dr6 has no reason to give us about the origin of this trap,
765 * then it's very likely the result of an icebp/int01 trap.
766 * User wants a sigtrap for that.
767 */
768 if (!dr6 && user_mode(regs))
769 user_icebp = 1;
770
540 if (v8086_mode(regs)) {
541 local_irq_enable();
542 handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
543 return;
544 }
545
546 tsk = current;
547 if (!user_mode(regs)) {

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759 /*
760 * If dr6 has no reason to give us about the origin of this trap,
761 * then it's very likely the result of an icebp/int01 trap.
762 * User wants a sigtrap for that.
763 */
764 if (!dr6 && user_mode(regs))
765 user_icebp = 1;
766
767 /* Catch kmemcheck conditions! */
768 if ((dr6 & DR_STEP) && kmemcheck_trap(regs))
769 goto exit;
770
771 /* Store the virtualized DR6 value */
772 tsk->thread.debugreg6 = dr6;
773
774#ifdef CONFIG_KPROBES
775 if (kprobe_debug_handler(regs))
776 goto exit;
777#endif
778

--- 189 unchanged lines hidden --- 		771 /* Store the virtualized DR6 value */
772 tsk->thread.debugreg6 = dr6;
773
774#ifdef CONFIG_KPROBES
775 if (kprobe_debug_handler(regs))
776 goto exit;
777#endif
778

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