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/* $OpenBSD: db_machdep.h,v 1.4 1997/05/29 00:04:37 niklas Exp $ */
/* $NetBSD: db_machdep.h,v 1.2 1996/04/08 18:35:47 ragge Exp $ */
/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#ifndef _VAX_DB_MACHDEP_H_
#define _VAX_DB_MACHDEP_H_
/*
* Machine-dependent defines for new kernel debugger.
* Modified for vax out of i386 code.
*/
#include <sys/param.h>
#include <vm/vm.h>
#include <machine/trap.h>
typedef vm_offset_t db_addr_t; /* address - unsigned */
typedef int db_expr_t; /* expression - signed */
typedef struct trapframe db_regs_t;
db_regs_t ddb_regs; /* register state */
#define DDB_REGS (&ddb_regs)
#define PC_REGS(regs) ((db_addr_t)(regs)->pc)
#define BKPT_INST 0x03 /* breakpoint instruction */
#define BKPT_SIZE (1) /* size of breakpoint inst */
#define BKPT_SET(inst) (BKPT_INST)
#define FIXUP_PC_AFTER_BREAK(regs) ((regs)->pc -= BKPT_SIZE)
#define db_clear_single_step(regs) ((regs)->psl &= ~PSL_T)
#define db_set_single_step(regs) ((regs)->psl |= PSL_T)
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
#define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP)
#define I_CALL 0xfb
#define I_RET 0x04
#define I_IRET 0x02
#define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
#define inst_return(ins) (((ins)&0xff) == I_RET)
#define inst_call(ins) (((ins)&0xff) == I_CALL)
#define inst_load(ins) 0
#define inst_store(ins) 0
/* Prototypes */
void kdb_trap __P((struct trapframe *));
#endif /* _VAX_DB_MACHDEP_H_ */
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