xnu-1504.15.3.tar.gz

[apple/xnu.git] / osfmk / i386 / trap.h

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/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */

#ifndef	_I386_TRAP_H_
#define	_I386_TRAP_H_

/*
 * Hardware trap vectors for i386.
 */
#define	T_DIVIDE_ERROR		0
#define	T_DEBUG			1
#define	T_NMI			2		/* non-maskable interrupt */
#define	T_INT3			3		/* int 3 instruction */
#define	T_OVERFLOW		4		/* overflow test */
#define	T_OUT_OF_BOUNDS		5		/* bounds check */
#define	T_INVALID_OPCODE	6		/* invalid op code */
#define	T_NO_FPU		7		/* no floating point */
#define	T_DOUBLE_FAULT		8		/* double fault */
#define	T_FPU_FAULT		9
#define T_INVALID_TSS		10
#define	T_SEGMENT_NOT_PRESENT	11
#define	T_STACK_FAULT		12
#define	T_GENERAL_PROTECTION	13
#define	T_PAGE_FAULT		14
/*				15 */
#define	T_FLOATING_POINT_ERROR	16
#define	T_WATCHPOINT		17
#define T_MACHINE_CHECK		18
#define T_SSE_FLOAT_ERROR       19
/*                          20-126 */
#define T_DTRACE_RET            127

/* The SYSENTER and SYSCALL trap numbers are software constructs.
 * These exceptions are dispatched directly to the system call handlers.
 * See also the "software interrupt codes" section of
 * osfmk/mach/i386/syscall_sw.h
 */
#define	T_SYSENTER		0x84
#define	T_SYSCALL		0x85

#define T_PREEMPT		255

#define TRAP_NAMES "divide error", "debug trap", "NMI", "breakpoint", \
		   "overflow", "bounds check", "invalid opcode", \
		   "no coprocessor", "double fault", "coprocessor overrun", \
		   "invalid TSS", "segment not present", "stack bounds", \
		   "general protection", "page fault", "(reserved)", \
		   "coprocessor error", "watchpoint", "machine check", "SSE floating point"

/*
 * Page-fault trap codes.
 */
#define	T_PF_PROT		0x1		/* protection violation */
#define	T_PF_WRITE		0x2		/* write access */
#define	T_PF_USER		0x4		/* from user state */

#ifdef PAE
#define	T_PF_RSVD		0x8		/* reserved bit set to 1 */
#define T_PF_EXECUTE		0x10		/* instruction fetch when NX */
#endif


#if !defined(ASSEMBLER) && defined(MACH_KERNEL)

#include <i386/thread.h>

extern void		i386_exception(
				int			exc,
				mach_exception_code_t	code,
				mach_exception_subcode_t subcode);

extern void		sync_iss_to_iks(x86_saved_state_t *regs);

extern void		sync_iss_to_iks_unconditionally(
				x86_saved_state_t	*regs);

extern void		kernel_trap(x86_saved_state_t *regs);

extern void		user_trap(x86_saved_state_t *regs);

extern void		interrupt(x86_saved_state_t *regs);

#ifdef __i386__
extern void		panic_double_fault32(int code);
extern void		panic_machine_check32(int	code);
#endif
extern void		panic_double_fault64(x86_saved_state_t *regs);
extern void		panic_machine_check64(x86_saved_state_t *regs);

extern void		i386_astintr(int preemption);


typedef kern_return_t (*perfCallback)(
				int			trapno,
				void			*regs,
				int			unused1,
				int			unused2);

extern volatile perfCallback perfTrapHook;
extern volatile perfCallback perfASTHook;
extern volatile perfCallback perfIntHook;

extern void		panic_i386_backtrace(void *, int, const char *, boolean_t, x86_saved_state_t *);
#if MACH_KDP
extern boolean_t	kdp_i386_trap(
				unsigned int,
#ifdef __i386__
				x86_saved_state32_t *,
#else
				x86_saved_state64_t *,
#endif
				kern_return_t,
				vm_offset_t);
#endif /* MACH_KDP */
#endif	/* !ASSEMBLER && MACH_KERNEL */

#endif	/* _I386_TRAP_H_ */