Annotation of sys/arch/arm/include/trap.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: trap.h,v 1.1 2004/02/01 05:09:49 drahn Exp $ */
! 2: /* $NetBSD: trap.h,v 1.4 2003/04/28 01:54:50 briggs Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995 Mark Brinicombe.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by Mark Brinicombe.
! 19: * 4. The name of the company nor the name of the author may be used to
! 20: * endorse or promote products derived from this software without specific
! 21: * prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
! 24: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
! 25: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 26: * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
! 27: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 28: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 29: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: *
! 35: * RiscBSD kernel project
! 36: *
! 37: * trap.h
! 38: *
! 39: * Various trap definitions
! 40: */
! 41:
! 42: /*
! 43: * Instructions used for breakpoints.
! 44: *
! 45: * These are undefined instructions.
! 46: * Technically the userspace breakpoint could be a SWI but we want to
! 47: * keep this the same as IPKDB which needs an undefined instruction as
! 48: * a break point.
! 49: *
! 50: * Ideally ARM would define several standard instruction sequences for
! 51: * use as breakpoints.
! 52: *
! 53: * The BKPT instruction isn't much use to us, since its behaviour is
! 54: * unpredictable on ARMv3 and lower.
! 55: *
! 56: * The ARM ARM says that for maximum compatibility, we should use undefined
! 57: * instructions that look like 0x.7f...f. .
! 58: */
! 59:
! 60: #define GDB_BREAKPOINT 0xe6000011 /* Used by GDB 4.x */
! 61: #define IPKDB_BREAKPOINT 0xe6000010 /* Used by IPKDB */
! 62: #define GDB5_BREAKPOINT 0xe7ffdefe /* Used by GDB 5.0 */
! 63: #define KERNEL_BREAKPOINT 0xe7ffffff /* Used by DDB */
! 64:
! 65: #define KBPT_ASM ".word 0xe7ffdefe"
! 66:
! 67: #define USER_BREAKPOINT GDB_BREAKPOINT
! 68:
! 69: #define T_FAULT 1
! 70:
! 71: /* End of trap.h */
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