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db_machdep.h revision 1.3 
      1 /*	$NetBSD: db_machdep.h,v 1.3 1997/02/06 21:16:28 gwr Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #ifndef	_ALPHA_DB_MACHDEP_H_
     31 #define	_ALPHA_DB_MACHDEP_H_
     32 
     33 /*
     34  * Machine-dependent defines for new kernel debugger.
     35  */
     36 
     37 #include <sys/param.h>
     38 #include <vm/vm.h>
     39 #include <machine/frame.h>
     40 
     41 typedef	vm_offset_t	db_addr_t;	/* address - unsigned */
     42 typedef	long		db_expr_t;	/* expression - signed */
     43 
     44 typedef struct trapframe db_regs_t;
     45 db_regs_t		ddb_regs;	/* register state */
     46 #define	DDB_REGS	(&ddb_regs)
     47 
     48 #define	PC_REGS(regs)	((db_addr_t)(regs)->tf_regs[FRAME_PC])
     49 
     50 #define	BKPT_INST	0x00000080	/* breakpoint instruction */
     51 #define	BKPT_SIZE	(4)		/* size of breakpoint inst */
     52 #define	BKPT_SET(inst)	(BKPT_INST)
     53 
     54 #define	FIXUP_PC_AFTER_BREAK(regs) \
     55 	((regs)->tf_regs[FRAME_PC] -= BKPT_SIZE)
     56 
     57 #endif	/* _ALPHA_DB_MACHDEP_H_ */
     58