1*821d1353Sderaadt /* $OpenBSD: trap.h,v 1.2 2018/06/30 15:23:37 deraadt Exp $ */ 2e1e4f5b1Sdrahn /* $NetBSD: trap.h,v 1.4 2003/04/28 01:54:50 briggs Exp $ */ 3e1e4f5b1Sdrahn 4e1e4f5b1Sdrahn /* 5e1e4f5b1Sdrahn * Copyright (c) 1995 Mark Brinicombe. 6e1e4f5b1Sdrahn * All rights reserved. 7e1e4f5b1Sdrahn * 8e1e4f5b1Sdrahn * Redistribution and use in source and binary forms, with or without 9e1e4f5b1Sdrahn * modification, are permitted provided that the following conditions 10e1e4f5b1Sdrahn * are met: 11e1e4f5b1Sdrahn * 1. Redistributions of source code must retain the above copyright 12e1e4f5b1Sdrahn * notice, this list of conditions and the following disclaimer. 13e1e4f5b1Sdrahn * 2. Redistributions in binary form must reproduce the above copyright 14e1e4f5b1Sdrahn * notice, this list of conditions and the following disclaimer in the 15e1e4f5b1Sdrahn * documentation and/or other materials provided with the distribution. 16e1e4f5b1Sdrahn * 3. All advertising materials mentioning features or use of this software 17e1e4f5b1Sdrahn * must display the following acknowledgement: 18e1e4f5b1Sdrahn * This product includes software developed by Mark Brinicombe. 19e1e4f5b1Sdrahn * 4. The name of the company nor the name of the author may be used to 20e1e4f5b1Sdrahn * endorse or promote products derived from this software without specific 21e1e4f5b1Sdrahn * prior written permission. 22e1e4f5b1Sdrahn * 23e1e4f5b1Sdrahn * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 24e1e4f5b1Sdrahn * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25e1e4f5b1Sdrahn * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26e1e4f5b1Sdrahn * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27e1e4f5b1Sdrahn * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28e1e4f5b1Sdrahn * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29e1e4f5b1Sdrahn * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30e1e4f5b1Sdrahn * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31e1e4f5b1Sdrahn * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32e1e4f5b1Sdrahn * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33e1e4f5b1Sdrahn * SUCH DAMAGE. 34e1e4f5b1Sdrahn * 35e1e4f5b1Sdrahn * RiscBSD kernel project 36e1e4f5b1Sdrahn * 37e1e4f5b1Sdrahn * trap.h 38e1e4f5b1Sdrahn * 39e1e4f5b1Sdrahn * Various trap definitions 40e1e4f5b1Sdrahn */ 41e1e4f5b1Sdrahn 42e1e4f5b1Sdrahn /* 43e1e4f5b1Sdrahn * Instructions used for breakpoints. 44e1e4f5b1Sdrahn * 45e1e4f5b1Sdrahn * These are undefined instructions. 46e1e4f5b1Sdrahn * Technically the userspace breakpoint could be a SWI but we want to 47e1e4f5b1Sdrahn * keep this the same as IPKDB which needs an undefined instruction as 48e1e4f5b1Sdrahn * a break point. 49e1e4f5b1Sdrahn * 50e1e4f5b1Sdrahn * Ideally ARM would define several standard instruction sequences for 51e1e4f5b1Sdrahn * use as breakpoints. 52e1e4f5b1Sdrahn * 53e1e4f5b1Sdrahn * The BKPT instruction isn't much use to us, since its behaviour is 54e1e4f5b1Sdrahn * unpredictable on ARMv3 and lower. 55e1e4f5b1Sdrahn * 56e1e4f5b1Sdrahn * The ARM ARM says that for maximum compatibility, we should use undefined 57e1e4f5b1Sdrahn * instructions that look like 0x.7f...f. . 58e1e4f5b1Sdrahn */ 59e1e4f5b1Sdrahn 60e1e4f5b1Sdrahn #define GDB_BREAKPOINT 0xe6000011 /* Used by GDB 4.x */ 61e1e4f5b1Sdrahn #define IPKDB_BREAKPOINT 0xe6000010 /* Used by IPKDB */ 62e1e4f5b1Sdrahn #define GDB5_BREAKPOINT 0xe7ffdefe /* Used by GDB 5.0 */ 63e1e4f5b1Sdrahn #define KERNEL_BREAKPOINT 0xe7ffffff /* Used by DDB */ 64e1e4f5b1Sdrahn 65e1e4f5b1Sdrahn #define KBPT_ASM ".word 0xe7ffdefe" 66e1e4f5b1Sdrahn 67e1e4f5b1Sdrahn #define USER_BREAKPOINT GDB_BREAKPOINT 68e1e4f5b1Sdrahn 69e1e4f5b1Sdrahn #define T_FAULT 1 70