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/* $OpenBSD: trap.h,v 1.1 2004/02/01 05:09:49 drahn Exp $ */
/* $NetBSD: trap.h,v 1.4 2003/04/28 01:54:50 briggs Exp $ */
/*
* Copyright (c) 1995 Mark Brinicombe.
* All rights reserved.
*
* 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 Mark Brinicombe.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* RiscBSD kernel project
*
* trap.h
*
* Various trap definitions
*/
/*
* Instructions used for breakpoints.
*
* These are undefined instructions.
* Technically the userspace breakpoint could be a SWI but we want to
* keep this the same as IPKDB which needs an undefined instruction as
* a break point.
*
* Ideally ARM would define several standard instruction sequences for
* use as breakpoints.
*
* The BKPT instruction isn't much use to us, since its behaviour is
* unpredictable on ARMv3 and lower.
*
* The ARM ARM says that for maximum compatibility, we should use undefined
* instructions that look like 0x.7f...f. .
*/
#define GDB_BREAKPOINT 0xe6000011 /* Used by GDB 4.x */
#define IPKDB_BREAKPOINT 0xe6000010 /* Used by IPKDB */
#define GDB5_BREAKPOINT 0xe7ffdefe /* Used by GDB 5.0 */
#define KERNEL_BREAKPOINT 0xe7ffffff /* Used by DDB */
#define KBPT_ASM ".word 0xe7ffdefe"
#define USER_BREAKPOINT GDB_BREAKPOINT
#define T_FAULT 1
/* End of trap.h */
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