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
  13 asmlinkage void divide_error(void);
  14 asmlinkage void debug(void);
  15 asmlinkage void nmi(void);
  16 asmlinkage void int3(void);
  17 asmlinkage void overflow(void);
  18 asmlinkage void bounds(void);
  19 asmlinkage void invalid_op(void);
  20 asmlinkage void device_not_available(void);
  21 #ifdef CONFIG_X86_64
  22 asmlinkage void double_fault(void);
  23 #endif
  24 asmlinkage void coprocessor_segment_overrun(void);
  25 asmlinkage void invalid_TSS(void);
  26 asmlinkage void segment_not_present(void);
  27 asmlinkage void stack_segment(void);
  28 asmlinkage void general_protection(void);
  29 asmlinkage void page_fault(void);
  30 asmlinkage void async_page_fault(void);
  31 asmlinkage void spurious_interrupt_bug(void);
  32 asmlinkage void coprocessor_error(void);
  33 asmlinkage void alignment_check(void);
  34 #ifdef CONFIG_X86_MCE
  35 asmlinkage void machine_check(void);
  36 #endif /* CONFIG_X86_MCE */
  37 asmlinkage void simd_coprocessor_error(void);
  38
  39 #if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
  40 asmlinkage void xen_divide_error(void);
  41 asmlinkage void xen_xennmi(void);
  42 asmlinkage void xen_xendebug(void);
  43 asmlinkage void xen_int3(void);
  44 asmlinkage void xen_overflow(void);
  45 asmlinkage void xen_bounds(void);
  46 asmlinkage void xen_invalid_op(void);
  47 asmlinkage void xen_device_not_available(void);
  48 asmlinkage void xen_double_fault(void);
  49 asmlinkage void xen_coprocessor_segment_overrun(void);
  50 asmlinkage void xen_invalid_TSS(void);
  51 asmlinkage void xen_segment_not_present(void);
  52 asmlinkage void xen_stack_segment(void);
  53 asmlinkage void xen_general_protection(void);
  54 asmlinkage void xen_page_fault(void);
  55 asmlinkage void xen_spurious_interrupt_bug(void);
  56 asmlinkage void xen_coprocessor_error(void);
  57 asmlinkage void xen_alignment_check(void);
  58 #ifdef CONFIG_X86_MCE
  59 asmlinkage void xen_machine_check(void);
  60 #endif /* CONFIG_X86_MCE */
  61 asmlinkage void xen_simd_coprocessor_error(void);
  62 #endif
  63
  64 dotraplinkage void do_divide_error(struct pt_regs *, long);
  65 dotraplinkage void do_debug(struct pt_regs *, long);
  66 dotraplinkage void do_nmi(struct pt_regs *, long);
  67 dotraplinkage void do_int3(struct pt_regs *, long);
  68 dotraplinkage void do_overflow(struct pt_regs *, long);
  69 dotraplinkage void do_bounds(struct pt_regs *, long);
  70 dotraplinkage void do_invalid_op(struct pt_regs *, long);
  71 dotraplinkage void do_device_not_available(struct pt_regs *, long);
  72 dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *, long);
  73 dotraplinkage void do_invalid_TSS(struct pt_regs *, long);
  74 dotraplinkage void do_segment_not_present(struct pt_regs *, long);
  75 dotraplinkage void do_stack_segment(struct pt_regs *, long);
  76 #ifdef CONFIG_X86_64
  77 dotraplinkage void do_double_fault(struct pt_regs *, long);
  78 #endif
  79 dotraplinkage void do_general_protection(struct pt_regs *, long);
  80 dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
  81 dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long);
  82 dotraplinkage void do_coprocessor_error(struct pt_regs *, long);
  83 dotraplinkage void do_alignment_check(struct pt_regs *, long);
  84 #ifdef CONFIG_X86_MCE
  85 dotraplinkage void do_machine_check(struct pt_regs *, long);
  86 #endif
  87 dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long);
  88 #ifdef CONFIG_X86_32
  89 dotraplinkage void do_iret_error(struct pt_regs *, long);
  90 #endif
  91 dotraplinkage void do_mce(struct pt_regs *, long);
  92
  93 static 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
 103 extern int panic_on_unrecovered_nmi;
 104
 105 void math_emulate(struct math_emu_info *);
 106 #ifndef CONFIG_X86_32
 107 asmlinkage void smp_thermal_interrupt(struct pt_regs *regs);
 108 asmlinkage void smp_threshold_interrupt(struct pt_regs *regs);
 109 asmlinkage void smp_deferred_error_interrupt(struct pt_regs *regs);
 110 #endif
 111
 112 extern void ist_enter(struct pt_regs *regs);
 113 extern void ist_exit(struct pt_regs *regs);
 114 extern void ist_begin_non_atomic(struct pt_regs *regs);
 115 extern void ist_end_non_atomic(void);
 116
 117 #ifdef CONFIG_VMAP_STACK
 118 void __noreturn handle_stack_overflow(const char *message,
 119                                       struct pt_regs *regs,
 120                                       unsigned long fault_address);
 121 #endif
 122
 123 /* Interrupts/Exceptions */
 124 enum {
 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  */
 158 enum 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 */