freebsd/sys/i386/include/trap.h

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)trap.h	5.4 (Berkeley) 5/9/91
 * $FreeBSD$
 */

#ifndef _MACHINE_TRAP_H_
#define	_MACHINE_TRAP_H_

/*
 * Trap type values
 * also known in trap.c for name strings
 */

#define	T_PRIVINFLT	1	/* privileged instruction */
#define	T_BPTFLT	3	/* breakpoint instruction */
#define	T_ARITHTRAP	6	/* arithmetic trap */
#define	T_ASTFLT	7	/* system forced exception */
#define	T_PROTFLT	9	/* protection fault */
#define	T_TRCTRAP	10	/* debug exception (sic) */
#define	T_PAGEFLT	12	/* page fault */
#define	T_ALIGNFLT	14	/* alignment fault */

#define	T_DIVIDE	18	/* integer divide fault */
#define	T_NMI		19	/* non-maskable trap */
#define	T_OFLOW		20	/* overflow trap */
#define	T_BOUND		21	/* bound instruction fault */
#define	T_DNA		22	/* device not available fault */
#define	T_DOUBLEFLT	23	/* double fault */
#define	T_FPOPFLT	24	/* fp coprocessor operand fetch fault */
#define	T_TSSFLT	25	/* invalid tss fault */
#define	T_SEGNPFLT	26	/* segment not present fault */
#define	T_STKFLT	27	/* stack fault */
#define	T_MCHK		28	/* machine check trap */
#define	T_RESERVED	29	/* reserved (unknown) */

/* XXX most of the following codes aren't used, but could be. */

/* definitions for <sys/signal.h> */
#define	    ILL_RESAD_FAULT	T_RESADFLT
#define	    ILL_PRIVIN_FAULT	T_PRIVINFLT
#define	    ILL_RESOP_FAULT	T_RESOPFLT
#define	    ILL_ALIGN_FAULT	T_ALIGNFLT
#define	    ILL_FPOP_FAULT	T_FPOPFLT	/* coprocessor operand fault */

/* portable macros for SIGFPE/ARITHTRAP */
#define FPE_INTOVF	1	/* integer overflow */
#define FPE_INTDIV	2	/* integer divide by zero */
#define FPE_FLTDIV	3	/* floating point divide by zero */
#define FPE_FLTOVF	4	/* floating point overflow */
#define FPE_FLTUND	5	/* floating point underflow */
#define FPE_FLTRES	6	/* floating point inexact result */
#define FPE_FLTINV	7	/* invalid floating point operation */
#define FPE_FLTSUB	8	/* subscript out of range */

/* old FreeBSD macros, deprecated */
#define	FPE_INTOVF_TRAP	0x1	/* integer overflow */
#define	FPE_INTDIV_TRAP	0x2	/* integer divide by zero */
#define	FPE_FLTDIV_TRAP	0x3	/* floating/decimal divide by zero */
#define	FPE_FLTOVF_TRAP	0x4	/* floating overflow */
#define	FPE_FLTUND_TRAP	0x5	/* floating underflow */
#define	FPE_FPU_NP_TRAP	0x6	/* floating point unit not present  */
#define	FPE_SUBRNG_TRAP	0x7	/* subrange out of bounds */

/* codes for SIGBUS */
#define	    BUS_PAGE_FAULT	T_PAGEFLT	/* page fault protection base */
#define	    BUS_SEGNP_FAULT	T_SEGNPFLT	/* segment not present */
#define	    BUS_STK_FAULT	T_STKFLT	/* stack segment */
#define	    BUS_SEGM_FAULT	T_RESERVED	/* segment protection base */

/* Trap's coming from user mode */
#define	T_USER	0x100

#endif /* !_MACHINE_TRAP_H_ */