LXR linux/arch/x86/include/asm/traps.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_X86_TRAPS_H
   3#define _ASM_X86_TRAPS_H
   4
   5#include <linux/context_tracking_state.h>
   6#include <linux/kprobes.h>
   7
   8#include <asm/debugreg.h>
   9#include <asm/siginfo.h>                        /* TRAP_TRACE, ... */
  10
  11#define dotraplinkage __visible
  12
  13asmlinkage void divide_error(void);
  14asmlinkage void debug(void);
  15asmlinkage void nmi(void);
  16asmlinkage void int3(void);
  17asmlinkage void overflow(void);
  18asmlinkage void bounds(void);
  19asmlinkage void invalid_op(void);
  20asmlinkage void device_not_available(void);
  21#ifdef CONFIG_X86_64
  22asmlinkage void double_fault(void);
  23#endif
  24asmlinkage void coprocessor_segment_overrun(void);
  25asmlinkage void invalid_TSS(void);
  26asmlinkage void segment_not_present(void);
  27asmlinkage void stack_segment(void);
  28asmlinkage void general_protection(void);
  29asmlinkage void page_fault(void);
  30asmlinkage void async_page_fault(void);
  31asmlinkage void spurious_interrupt_bug(void);
  32asmlinkage void coprocessor_error(void);
  33asmlinkage void alignment_check(void);
  34#ifdef CONFIG_X86_MCE
  35asmlinkage void machine_check(void);
  36#endif /* CONFIG_X86_MCE */
  37asmlinkage void simd_coprocessor_error(void);
  38
  39#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
  40asmlinkage void xen_divide_error(void);
  41asmlinkage void xen_xennmi(void);
  42asmlinkage void xen_xendebug(void);
  43asmlinkage void xen_xenint3(void);
  44asmlinkage void xen_overflow(void);
  45asmlinkage void xen_bounds(void);
  46asmlinkage void xen_invalid_op(void);
  47asmlinkage void xen_device_not_available(void);
  48asmlinkage void xen_double_fault(void);
  49asmlinkage void xen_coprocessor_segment_overrun(void);
  50asmlinkage void xen_invalid_TSS(void);
  51asmlinkage void xen_segment_not_present(void);
  52asmlinkage void xen_stack_segment(void);
  53asmlinkage void xen_general_protection(void);
  54asmlinkage void xen_page_fault(void);
  55asmlinkage void xen_spurious_interrupt_bug(void);
  56asmlinkage void xen_coprocessor_error(void);
  57asmlinkage void xen_alignment_check(void);
  58#ifdef CONFIG_X86_MCE
  59asmlinkage void xen_machine_check(void);
  60#endif /* CONFIG_X86_MCE */
  61asmlinkage void xen_simd_coprocessor_error(void);
  62#endif
  63
  64dotraplinkage void do_divide_error(struct pt_regs *, long);
  65dotraplinkage void do_debug(struct pt_regs *, long);
  66dotraplinkage void do_nmi(struct pt_regs *, long);
  67dotraplinkage void do_int3(struct pt_regs *, long);
  68dotraplinkage void do_overflow(struct pt_regs *, long);
  69dotraplinkage void do_bounds(struct pt_regs *, long);
  70dotraplinkage void do_invalid_op(struct pt_regs *, long);
  71dotraplinkage void do_device_not_available(struct pt_regs *, long);
  72dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *, long);
  73dotraplinkage void do_invalid_TSS(struct pt_regs *, long);
  74dotraplinkage void do_segment_not_present(struct pt_regs *, long);
  75dotraplinkage void do_stack_segment(struct pt_regs *, long);
  76#ifdef CONFIG_X86_64
  77dotraplinkage void do_double_fault(struct pt_regs *, long);
  78#endif
  79dotraplinkage void do_general_protection(struct pt_regs *, long);
  80dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
  81dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long);
  82dotraplinkage void do_coprocessor_error(struct pt_regs *, long);
  83dotraplinkage void do_alignment_check(struct pt_regs *, long);
  84#ifdef CONFIG_X86_MCE
  85dotraplinkage void do_machine_check(struct pt_regs *, long);
  86#endif
  87dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long);
  88#ifdef CONFIG_X86_32
  89dotraplinkage void do_iret_error(struct pt_regs *, long);
  90#endif
  91dotraplinkage void do_mce(struct pt_regs *, long);
  92
  93static inline int get_si_code(unsigned long condition)
  94{
  95        if (condition & DR_STEP)
  96                return TRAP_TRACE;
  97        else if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3))
  98                return TRAP_HWBKPT;
  99        else
 100                return TRAP_BRKPT;
 101}
 102
 103extern int panic_on_unrecovered_nmi;
 104
 105void math_emulate(struct math_emu_info *);
 106#ifndef CONFIG_X86_32
 107asmlinkage void smp_thermal_interrupt(void);
 108asmlinkage void smp_threshold_interrupt(void);
 109asmlinkage void smp_deferred_error_interrupt(void);
 110#endif
 111
 112extern void ist_enter(struct pt_regs *regs);
 113extern void ist_exit(struct pt_regs *regs);
 114extern void ist_begin_non_atomic(struct pt_regs *regs);
 115extern void ist_end_non_atomic(void);
 116
 117#ifdef CONFIG_VMAP_STACK
 118void __noreturn handle_stack_overflow(const char *message,
 119                                      struct pt_regs *regs,
 120                                      unsigned long fault_address);
 121#endif
 122
 123/* Interrupts/Exceptions */
 124enum {
 125        X86_TRAP_DE = 0,        /*  0, Divide-by-zero */
 126        X86_TRAP_DB,            /*  1, Debug */
 127        X86_TRAP_NMI,           /*  2, Non-maskable Interrupt */
 128        X86_TRAP_BP,            /*  3, Breakpoint */
 129        X86_TRAP_OF,            /*  4, Overflow */
 130        X86_TRAP_BR,            /*  5, Bound Range Exceeded */
 131        X86_TRAP_UD,            /*  6, Invalid Opcode */
 132        X86_TRAP_NM,            /*  7, Device Not Available */
 133        X86_TRAP_DF,            /*  8, Double Fault */
 134        X86_TRAP_OLD_MF,        /*  9, Coprocessor Segment Overrun */
 135        X86_TRAP_TS,            /* 10, Invalid TSS */
 136        X86_TRAP_NP,            /* 11, Segment Not Present */
 137        X86_TRAP_SS,            /* 12, Stack Segment Fault */
 138        X86_TRAP_GP,            /* 13, General Protection Fault */
 139        X86_TRAP_PF,            /* 14, Page Fault */
 140        X86_TRAP_SPURIOUS,      /* 15, Spurious Interrupt */
 141        X86_TRAP_MF,            /* 16, x87 Floating-Point Exception */
 142        X86_TRAP_AC,            /* 17, Alignment Check */
 143        X86_TRAP_MC,            /* 18, Machine Check */
 144        X86_TRAP_XF,            /* 19, SIMD Floating-Point Exception */
 145        X86_TRAP_IRET = 32,     /* 32, IRET Exception */
 146};
 147
 148/*
 149 * Page fault error code bits:
 150 *
 151 *   bit 0 ==    0: no page found       1: protection fault
 152 *   bit 1 ==    0: read access         1: write access
 153 *   bit 2 ==    0: kernel-mode access  1: user-mode access
 154 *   bit 3 ==                           1: use of reserved bit detected
 155 *   bit 4 ==                           1: fault was an instruction fetch
 156 *   bit 5 ==                           1: protection keys block access
 157 */
 158enum x86_pf_error_code {
 159        X86_PF_PROT     =               1 << 0,
 160        X86_PF_WRITE    =               1 << 1,
 161        X86_PF_USER     =               1 << 2,
 162        X86_PF_RSVD     =               1 << 3,
 163        X86_PF_INSTR    =               1 << 4,
 164        X86_PF_PK       =               1 << 5,
 165};
 166#endif /* _ASM_X86_TRAPS_H */
 167