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db_machdep.h revision 1.21.12.1 
      1 /*	$NetBSD: db_machdep.h,v 1.21.12.1 2000/11/20 20:11:38 bouyer Exp $	*/
      2 
      3 /*
      4  * Mach Operating System
      5  * Copyright (c) 1992 Carnegie Mellon University
      6  * All Rights Reserved.
      7  *
      8  * Permission to use, copy, modify and distribute this software and its
      9  * documentation is hereby granted, provided that both the copyright
     10  * notice and this permission notice appear in all copies of the
     11  * software, derivative works or modified versions, and any portions
     12  * thereof, and that both notices appear in supporting documentation.
     13  *
     14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     16  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17  *
     18  * Carnegie Mellon requests users of this software to return to
     19  *
     20  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21  *  School of Computer Science
     22  *  Carnegie Mellon University
     23  *  Pittsburgh PA 15213-3890
     24  *
     25  * any improvements or extensions that they make and grant Carnegie Mellon
     26  * the rights to redistribute these changes.
     27  */
     28 
     29 /*
     30  * Machine-dependent defines for new kernel debugger.
     31  */
     32 #ifndef	_M68K_DB_MACHDEP_H_
     33 #define	_M68K_DB_MACHDEP_H_
     34 
     35 #include <sys/types.h>
     36 
     37 /*
     38  * XXX - Would rather not pull in vm headers, but need boolean_t,
     39  * at least until boolean_t moves to <sys/types.h> or someplace.
     40  */
     41 #include <uvm/uvm_param.h>
     42 
     43 #include <machine/frame.h>
     44 #include <machine/psl.h>
     45 #include <machine/trap.h>
     46 
     47 typedef	vaddr_t		db_addr_t;	/* address - unsigned */
     48 typedef	long		db_expr_t;	/* expression - signed */
     49 typedef struct trapframe db_regs_t;
     50 
     51 extern db_regs_t	ddb_regs;	/* register state */
     52 #define DDB_REGS	(&ddb_regs)
     53 
     54 #define	PC_REGS(regs)	((db_addr_t)(regs)->tf_pc)
     55 
     56 #define	BKPT_INST	0x4e4f		/* breakpoint instruction */
     57 #define	BKPT_SIZE	(2)		/* size of breakpoint inst */
     58 #define	BKPT_SET(inst)	(BKPT_INST)
     59 
     60 #define	FIXUP_PC_AFTER_BREAK(regs)	((regs)->tf_pc -= BKPT_SIZE)
     61 
     62 #define	db_clear_single_step(regs)	((regs)->tf_sr &= ~PSL_T)
     63 #define	db_set_single_step(regs)	((regs)->tf_sr |=  PSL_T)
     64 
     65 #define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BREAKPOINT)
     66 #ifdef T_WATCHPOINT
     67 #define	IS_WATCHPOINT_TRAP(type, code)	((type) == T_WATCHPOINT)
     68 #else
     69 #define	IS_WATCHPOINT_TRAP(type, code)	0
     70 #endif
     71 
     72 #define	M_RTS		0xffff0000
     73 #define I_RTS		0x4e750000
     74 #define M_JSR		0xffc00000
     75 #define I_JSR		0x4e800000
     76 #define M_BSR		0xff000000
     77 #define I_BSR		0x61000000
     78 #define	M_RTE		0xffff0000
     79 #define	I_RTE		0x4e730000
     80 
     81 #define	inst_trap_return(ins)	(((ins)&M_RTE) == I_RTE)
     82 #define	inst_return(ins)	(((ins)&M_RTS) == I_RTS)
     83 #define	inst_call(ins)		(((ins)&M_JSR) == I_JSR || \
     84 				 ((ins)&M_BSR) == I_BSR)
     85 #define inst_load(ins)		0
     86 #define inst_store(ins)		0
     87 
     88 /*
     89  * Things needed by kgdb:
     90  */
     91 typedef long kgdb_reg_t;
     92 #define KGDB_NUMREGS	(16+2)
     93 #define KGDB_BUFLEN	512
     94 
     95 
     96 #ifdef _KERNEL
     97 
     98 void	Debugger __P((void));	/* XXX */
     99 void	kdb_kintr __P((db_regs_t *));
    100 int 	kdb_trap __P((int, db_regs_t *));
    101 
    102 #endif /* _KERNEL */
    103 
    104 /*
    105  * We use a.out symbols in DDB.
    106  */
    107 #define	DB_AOUT_SYMBOLS
    108 
    109 #endif	/* _M68K_DB_MACHDEP_H_ */
    110