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/* $OpenBSD: db_machdep.h,v 1.3 1997/01/19 13:53:09 niklas Exp $ */
/* $NetBSD: db_machdep.h,v 1.14 1997/01/15 23:11:46 gwr Exp $ */
/*
* Mach Operating System
* Copyright (c) 1992 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.
*/
/*
* Machine-dependent defines for new kernel debugger.
*/
#ifndef _M68K_DB_MACHDEP_H_
#define _M68K_DB_MACHDEP_H_
#include <vm/vm_prot.h>
#include <vm/vm_param.h>
#include <vm/vm_inherit.h>
#include <vm/lock.h>
#include <machine/psl.h>
#include <machine/trap.h>
typedef vm_offset_t db_addr_t; /* address - unsigned */
typedef int db_expr_t; /* expression - signed */
struct mc68020_saved_state {
int d0; /* data registers */
int d1;
int d2;
int d3;
int d4;
int d5;
int d6;
int d7;
int a0; /* address registers */
int a1;
int a2;
int a3;
int a4;
int a5;
int a6;
int sp; /* stack pointer */
short empty;
short stackadj;
unsigned short sr; /* status register */
unsigned int pc; /* program counter - UNALIGNED!!! */
unsigned short stkfmt : 4; /* rte stack frame format */
unsigned short vector : 12; /* vector number */
};
typedef struct mc68020_saved_state 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 0x4e4f /* breakpoint instruction */
#define BKPT_SIZE (2) /* size of breakpoint inst */
#define BKPT_SET(inst) (BKPT_INST)
#define FIXUP_PC_AFTER_BREAK ddb_regs.pc -= 2;
#define SR_T1 0x8000
#define db_clear_single_step(regs) ((regs)->sr &= ~SR_T1)
#define db_set_single_step(regs) ((regs)->sr |= SR_T1)
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
#ifdef T_WATCHPOINT
#define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT)
#else
#define IS_WATCHPOINT_TRAP(type, code) 0
#endif
#define M_RTS 0xffff0000
#define I_RTS 0x4e750000
#define M_JSR 0xffc00000
#define I_JSR 0x4e800000
#define M_BSR 0xff000000
#define I_BSR 0x61000000
#define M_RTE 0xffff0000
#define I_RTE 0x4e730000
#define inst_trap_return(ins) (((ins)&M_RTE) == I_RTE)
#define inst_return(ins) (((ins)&M_RTS) == I_RTS)
#define inst_call(ins) (((ins)&M_JSR) == I_JSR || \
((ins)&M_BSR) == I_BSR)
#define inst_load(ins) 0
#define inst_store(ins) 0
#ifdef _KERNEL
void kdb_kintr __P((db_regs_t *));
int kdb_trap __P((int, db_regs_t *));
#endif /* _KERNEL */
#endif /* _M68K_DB_MACHDEP_H_ */
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