text: /* SPDX-License-Identifier: GPL-2.0 */
  #ifndef _ASM_X86_TRAPS_H
  #define _ASM_X86_TRAPS_H
  
  #include <linux/context_tracking_state.h>
  #include <linux/kprobes.h>
  
  #include <asm/debugreg.h>
  #include <asm/siginfo.h>			/* TRAP_TRACE, ... */
  
  #define dotraplinkage __visible
  
  asmlinkage void divide_error(void);
  asmlinkage void debug(void);
  asmlinkage void nmi(void);
  asmlinkage void int3(void);
  asmlinkage void overflow(void);
  asmlinkage void bounds(void);
  asmlinkage void invalid_op(void);
  asmlinkage void device_not_available(void);
  #ifdef CONFIG_X86_64
  asmlinkage void double_fault(void);
  #endif
  asmlinkage void coprocessor_segment_overrun(void);
  asmlinkage void invalid_TSS(void);
  asmlinkage void segment_not_present(void);
  asmlinkage void stack_segment(void);
  asmlinkage void general_protection(void);
  asmlinkage void page_fault(void);
  asmlinkage void async_page_fault(void);
  asmlinkage void spurious_interrupt_bug(void);
  asmlinkage void coprocessor_error(void);
  asmlinkage void alignment_check(void);
  #ifdef CONFIG_X86_MCE
  asmlinkage void machine_check(void);
  #endif /* CONFIG_X86_MCE */
  asmlinkage void simd_coprocessor_error(void);
  
  #if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
  asmlinkage void xen_divide_error(void);
  asmlinkage void xen_xennmi(void);
  asmlinkage void xen_xendebug(void);
  asmlinkage void xen_int3(void);
  asmlinkage void xen_overflow(void);
  asmlinkage void xen_bounds(void);
  asmlinkage void xen_invalid_op(void);
  asmlinkage void xen_device_not_available(void);
  asmlinkage void xen_double_fault(void);
  asmlinkage void xen_coprocessor_segment_overrun(void);
  asmlinkage void xen_invalid_TSS(void);
  asmlinkage void xen_segment_not_present(void);
  asmlinkage void xen_stack_segment(void);
  asmlinkage void xen_general_protection(void);
  asmlinkage void xen_page_fault(void);
  asmlinkage void xen_spurious_interrupt_bug(void);
  asmlinkage void xen_coprocessor_error(void);
  asmlinkage void xen_alignment_check(void);
  #ifdef CONFIG_X86_MCE
  asmlinkage void xen_machine_check(void);
  #endif /* CONFIG_X86_MCE */
  asmlinkage void xen_simd_coprocessor_error(void);
  #endif
  
  dotraplinkage void do_divide_error(struct pt_regs *, long);
  dotraplinkage void do_debug(struct pt_regs *, long);
  dotraplinkage void do_nmi(struct pt_regs *, long);
  dotraplinkage void do_int3(struct pt_regs *, long);
  dotraplinkage void do_overflow(struct pt_regs *, long);
  dotraplinkage void do_bounds(struct pt_regs *, long);
  dotraplinkage void do_invalid_op(struct pt_regs *, long);
  dotraplinkage void do_device_not_available(struct pt_regs *, long);
  dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *, long);
  dotraplinkage void do_invalid_TSS(struct pt_regs *, long);
  dotraplinkage void do_segment_not_present(struct pt_regs *, long);
  dotraplinkage void do_stack_segment(struct pt_regs *, long);
  #ifdef CONFIG_X86_64
  dotraplinkage void do_double_fault(struct pt_regs *, long);
  #endif
  dotraplinkage void do_general_protection(struct pt_regs *, long);
  dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
  dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long);
  dotraplinkage void do_coprocessor_error(struct pt_regs *, long);
  dotraplinkage void do_alignment_check(struct pt_regs *, long);
  #ifdef CONFIG_X86_MCE
  dotraplinkage void do_machine_check(struct pt_regs *, long);
  #endif
  dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long);
  #ifdef CONFIG_X86_32
  dotraplinkage void do_iret_error(struct pt_regs *, long);
  #endif
  dotraplinkage void do_mce(struct pt_regs *, long);
  
  static inline int get_si_code(unsigned long condition)
  {
  	if (condition & DR_STEP)
  		return TRAP_TRACE;
  	else if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3))
  		return TRAP_HWBKPT;
  	else
  		return TRAP_BRKPT;
  }
  
  extern int panic_on_unrecovered_nmi;
  
  void math_emulate(struct math_emu_info *);
  #ifndef CONFIG_X86_32
  asmlinkage void smp_thermal_interrupt(struct pt_regs *regs);
  asmlinkage void smp_threshold_interrupt(struct pt_regs *regs);
  asmlinkage void smp_deferred_error_interrupt(struct pt_regs *regs);
  #endif
  
  extern void ist_enter(struct pt_regs *regs);
  extern void ist_exit(struct pt_regs *regs);
  extern void ist_begin_non_atomic(struct pt_regs *regs);
  extern void ist_end_non_atomic(void);
  
  #ifdef CONFIG_VMAP_STACK
  void __noreturn handle_stack_overflow(const char *message,
  				      struct pt_regs *regs,
  				      unsigned long fault_address);
  #endif
  
  /* Interrupts/Exceptions */
  enum {
  	X86_TRAP_DE = 0,	/*  0, Divide-by-zero */
  	X86_TRAP_DB,		/*  1, Debug */
  	X86_TRAP_NMI,		/*  2, Non-maskable Interrupt */
  	X86_TRAP_BP,		/*  3, Breakpoint */
  	X86_TRAP_OF,		/*  4, Overflow */
  	X86_TRAP_BR,		/*  5, Bound Range Exceeded */
  	X86_TRAP_UD,		/*  6, Invalid Opcode */
  	X86_TRAP_NM,		/*  7, Device Not Available */
  	X86_TRAP_DF,		/*  8, Double Fault */
  	X86_TRAP_OLD_MF,	/*  9, Coprocessor Segment Overrun */
  	X86_TRAP_TS,		/* 10, Invalid TSS */
  	X86_TRAP_NP,		/* 11, Segment Not Present */
  	X86_TRAP_SS,		/* 12, Stack Segment Fault */
  	X86_TRAP_GP,		/* 13, General Protection Fault */
  	X86_TRAP_PF,		/* 14, Page Fault */
  	X86_TRAP_SPURIOUS,	/* 15, Spurious Interrupt */
  	X86_TRAP_MF,		/* 16, x87 Floating-Point Exception */
  	X86_TRAP_AC,		/* 17, Alignment Check */
  	X86_TRAP_MC,		/* 18, Machine Check */
  	X86_TRAP_XF,		/* 19, SIMD Floating-Point Exception */
  	X86_TRAP_IRET = 32,	/* 32, IRET Exception */
  };
  
  /*
   * Page fault error code bits:
   *
   *   bit 0 ==	 0: no page found	1: protection fault
   *   bit 1 ==	 0: read access		1: write access
   *   bit 2 ==	 0: kernel-mode access	1: user-mode access
   *   bit 3 ==				1: use of reserved bit detected
   *   bit 4 ==				1: fault was an instruction fetch
   *   bit 5 ==				1: protection keys block access
   */
  enum x86_pf_error_code {
  	X86_PF_PROT	=		1 << 0,
  	X86_PF_WRITE	=		1 << 1,
  	X86_PF_USER	=		1 << 2,
  	X86_PF_RSVD	=		1 << 3,
  	X86_PF_INSTR	=		1 << 4,
  	X86_PF_PK	=		1 << 5,
  };
  #endif /* _ASM_X86_TRAPS_H */
  