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db_machdep.h revision 1.9 
      1 /*	$NetBSD: db_machdep.h,v 1.9 2000/01/10 03:53:20 eeh Exp $ */
      2 
      3 /*
      4  * Mach Operating System
      5  * Copyright (c) 1991,1990 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 #ifndef	_SPARC_DB_MACHDEP_H_
     30 #define	_SPARC_DB_MACHDEP_H_
     31 
     32 /*
     33  * Machine-dependent defines for new kernel debugger.
     34  */
     35 
     36 
     37 #include <vm/vm.h>
     38 #include <machine/frame.h>
     39 #include <machine/psl.h>
     40 #include <machine/trap.h>
     41 #include <machine/reg.h>
     42 
     43 /* end of mangling */
     44 
     45 typedef	vaddr_t		db_addr_t;	/* address - unsigned */
     46 typedef	long		db_expr_t;	/* expression - signed */
     47 
     48 #if 1
     49 typedef struct {
     50 	struct trapframe64 ddb_tf;
     51 	struct frame64	 ddb_fr;
     52 } db_regs_t;
     53 #else
     54 struct trapregs {
     55 	int64_t	tt;
     56 	int64_t tstate;
     57 	int64_t tpc;
     58 	int64_t	tnpc;
     59 };
     60 typedef struct db_regs {
     61 	struct trapregs dbr_traps[4];
     62 	int		dbr_y;
     63 	char		dbr_tl;
     64 	char		dbr_canrestore;
     65 	char		dbr_cansave;
     66 	char		dbr_cleanwin;
     67 	char		dbr_cwp;
     68 	char		dbr_wstate;
     69 	int64_t		dbr_g[8];
     70 	int64_t		dbr_ag[8];
     71 	int64_t		dbr_ig[8];
     72 	int64_t		dbr_mg[8];
     73 	int64_t		dbr_out[8];
     74 	int64_t		dbr_local[8];
     75 	int64_t		dbr_in[8];
     76 } db_regs_t;
     77 #endif
     78 
     79 db_regs_t		ddb_regs;	/* register state */
     80 #define	DDB_REGS	(&ddb_regs)
     81 #define	DDB_TF		(&ddb_regs.ddb_tf)
     82 #define	DDB_FR		(&ddb_regs.ddb_fr)
     83 
     84 #if defined(lint)
     85 #define	PC_REGS(regs)	((regs)->ddb_tf.tf_pc)
     86 #else
     87 #define	PC_REGS(regs)	((db_addr_t)(regs)->ddb_tf.tf_pc)
     88 #endif
     89 #define	PC_ADVANCE(regs) do {				\
     90 	vaddr_t n = (regs)->ddb_tf.tf_npc;		\
     91 	(regs)->ddb_tf.tf_pc = n;			\
     92 	(regs)->ddb_tf.tf_npc = n + 4;			\
     93 } while(0)
     94 
     95 #define	BKPT_INST	0x91d02001	/* breakpoint instruction */
     96 #define	BKPT_SIZE	(4)		/* size of breakpoint inst */
     97 #define	BKPT_SET(inst)	(BKPT_INST)
     98 
     99 #define	IS_BREAKPOINT_TRAP(type, code)	\
    100 	((type) == T_BREAKPOINT || (type) == T_KGDB_EXEC)
    101 #define IS_WATCHPOINT_TRAP(type, code)	\
    102 	((type) ==T_PA_WATCHPT || (type) == T_VA_WATCHPT)
    103 
    104 /*
    105  * Sparc cpus have no hardware single-step.
    106  */
    107 #define SOFTWARE_SSTEP
    108 
    109 boolean_t	db_inst_trap_return __P((int inst));
    110 boolean_t	db_inst_return __P((int inst));
    111 boolean_t	db_inst_call __P((int inst));
    112 boolean_t	db_inst_branch __P((int inst));
    113 int		db_inst_load __P((int inst));
    114 int		db_inst_store __P((int inst));
    115 boolean_t	db_inst_unconditional_flow_transfer __P((int inst));
    116 db_addr_t	db_branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs));
    117 
    118 #define inst_trap_return(ins)	db_inst_trap_return(ins)
    119 #define inst_return(ins)	db_inst_return(ins)
    120 #define inst_call(ins)		db_inst_call(ins)
    121 #define inst_branch(ins)	db_inst_branch(ins)
    122 #define inst_load(ins)		db_inst_load(ins)
    123 #define inst_store(ins)		db_inst_store(ins)
    124 #define	inst_unconditional_flow_transfer(ins) \
    125 				db_inst_unconditional_flow_transfer(ins)
    126 #define branch_taken(ins, pc, regs) \
    127 				db_branch_taken((ins), (pc), (regs))
    128 
    129 /* see note in db_interface.c about reversed breakpoint addrs */
    130 #define next_instr_address(pc, bd) \
    131 	((bd) ? (pc) : ddb_regs.ddb_tf.tf_npc)
    132 
    133 #define DB_MACHINE_COMMANDS
    134 
    135 void db_machine_init __P((void));
    136 int kdb_trap __P((int, struct trapframe64 *));
    137 
    138 /*
    139  * We will use elf symbols in DDB when they work.
    140  */
    141 #if 1
    142 #define	DB_ELF_SYMBOLS
    143 #ifdef __arch64__
    144 #define DB_ELFSIZE	64
    145 #else
    146 #define DB_ELFSIZE	32
    147 #endif
    148 #else
    149 #define DB_AOUT_SYMBOLS
    150 #endif
    151 /*
    152  * KGDB definitions
    153  */
    154 typedef u_long		kgdb_reg_t;
    155 #define KGDB_NUMREGS	72
    156 #define KGDB_BUFLEN	1024
    157 
    158 #endif	/* _SPARC_DB_MACHDEP_H_ */
    159