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_xenint3(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 asmlinkage struct pt_regs *sync_regs(struct pt_regs *); 79 #endif 80 dotraplinkage void do_general_protection(struct pt_regs *, long); 81 dotraplinkage void do_page_fault(struct pt_regs *, unsigned long); 82 dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long); 83 dotraplinkage void do_coprocessor_error(struct pt_regs *, long); 84 dotraplinkage void do_alignment_check(struct pt_regs *, long); 85 #ifdef CONFIG_X86_MCE 86 dotraplinkage void do_machine_check(struct pt_regs *, long); 87 #endif 88 dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long); 89 #ifdef CONFIG_X86_32 90 dotraplinkage void do_iret_error(struct pt_regs *, long); 91 #endif 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(void); 108 asmlinkage void smp_threshold_interrupt(void); 109 asmlinkage void smp_deferred_error_interrupt(void); 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 */ 167