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db_machdep.h revision 1.12 
      1 /*	$NetBSD: db_machdep.h,v 1.12 2001/07/07 15:16:13 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 #include <uvm/uvm_extern.h>
     37 
     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 struct trapstate {
     49 	int64_t tstate;
     50 	int64_t tpc;
     51 	int64_t	tnpc;
     52 	int64_t	tt;
     53 };
     54 #if 1
     55 typedef struct {
     56 	struct trapframe64	ddb_tf;
     57 	struct frame64		ddb_fr;
     58 	struct trapstate	ddb_ts[5];
     59 	int			ddb_tl;
     60 	struct fpstate64	ddb_fpstate;
     61 } db_regs_t;
     62 #else
     63 typedef struct db_regs {
     64 	struct trapregs dbr_traps[4];
     65 	int		dbr_y;
     66 	char		dbr_tl;
     67 	char		dbr_canrestore;
     68 	char		dbr_cansave;
     69 	char		dbr_cleanwin;
     70 	char		dbr_cwp;
     71 	char		dbr_wstate;
     72 	int64_t		dbr_g[8];
     73 	int64_t		dbr_ag[8];
     74 	int64_t		dbr_ig[8];
     75 	int64_t		dbr_mg[8];
     76 	int64_t		dbr_out[8];
     77 	int64_t		dbr_local[8];
     78 	int64_t		dbr_in[8];
     79 } db_regs_t;
     80 #endif
     81 
     82 db_regs_t		ddb_regs;	/* register state */
     83 #define	DDB_REGS	(&ddb_regs)
     84 #define	DDB_TF		(&ddb_regs.ddb_tf)
     85 #define	DDB_FR		(&ddb_regs.ddb_fr)
     86 #define	DDB_FP		(&ddb_regs.ddb_fpstate)
     87 
     88 #if defined(lint)
     89 #define	PC_REGS(regs)	((regs)->ddb_tf.tf_pc)
     90 #else
     91 #define	PC_REGS(regs)	((db_addr_t)(regs)->ddb_tf.tf_pc)
     92 #endif
     93 #define	PC_ADVANCE(regs) do {				\
     94 	vaddr_t n = (regs)->ddb_tf.tf_npc;		\
     95 	(regs)->ddb_tf.tf_pc = n;			\
     96 	(regs)->ddb_tf.tf_npc = n + 4;			\
     97 } while(0)
     98 
     99 #define	BKPT_INST	0x91d02001	/* breakpoint instruction */
    100 #define	BKPT_SIZE	(4)		/* size of breakpoint inst */
    101 #define	BKPT_SET(inst)	(BKPT_INST)
    102 
    103 #define	IS_BREAKPOINT_TRAP(type, code)	\
    104 	((type) == T_BREAKPOINT || (type) == T_KGDB_EXEC)
    105 #define IS_WATCHPOINT_TRAP(type, code)	\
    106 	((type) ==T_PA_WATCHPT || (type) == T_VA_WATCHPT)
    107 
    108 /*
    109  * Sparc cpus have no hardware single-step.
    110  */
    111 #define SOFTWARE_SSTEP
    112 
    113 boolean_t	db_inst_trap_return __P((int inst));
    114 boolean_t	db_inst_return __P((int inst));
    115 boolean_t	db_inst_call __P((int inst));
    116 boolean_t	db_inst_branch __P((int inst));
    117 int		db_inst_load __P((int inst));
    118 int		db_inst_store __P((int inst));
    119 boolean_t	db_inst_unconditional_flow_transfer __P((int inst));
    120 db_addr_t	db_branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs));
    121 
    122 #define inst_trap_return(ins)	db_inst_trap_return(ins)
    123 #define inst_return(ins)	db_inst_return(ins)
    124 #define inst_call(ins)		db_inst_call(ins)
    125 #define inst_branch(ins)	db_inst_branch(ins)
    126 #define inst_load(ins)		db_inst_load(ins)
    127 #define inst_store(ins)		db_inst_store(ins)
    128 #define	inst_unconditional_flow_transfer(ins) \
    129 				db_inst_unconditional_flow_transfer(ins)
    130 #define branch_taken(ins, pc, regs) \
    131 				db_branch_taken((ins), (pc), (regs))
    132 
    133 /* see note in db_interface.c about reversed breakpoint addrs */
    134 #define next_instr_address(pc, bd) \
    135 	((bd) ? (pc) : ddb_regs.ddb_tf.tf_npc)
    136 
    137 #define DB_MACHINE_COMMANDS
    138 
    139 void db_machine_init __P((void));
    140 int kdb_trap __P((int, struct trapframe64 *));
    141 
    142 /*
    143  * We will use elf symbols in DDB when they work.
    144  */
    145 #if 1
    146 #define	DB_ELF_SYMBOLS
    147 #ifdef __arch64__
    148 #define DB_ELFSIZE	64
    149 #else
    150 #define DB_ELFSIZE	32
    151 #endif
    152 #else
    153 #define DB_AOUT_SYMBOLS
    154 #endif
    155 /*
    156  * KGDB definitions
    157  */
    158 typedef u_long		kgdb_reg_t;
    159 #define KGDB_NUMREGS	72
    160 #define KGDB_BUFLEN	1024
    161 
    162 #endif	/* _SPARC_DB_MACHDEP_H_ */
    163