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db_machdep.h revision 1.20 
      1 /*	$NetBSD: db_machdep.h,v 1.20 2006/09/13 11:35:53 mrg 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	_SPARC64_DB_MACHDEP_H_
     30 #define	_SPARC64_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 
     44 typedef	vaddr_t		db_addr_t;	/* address - unsigned */
     45 typedef	long		db_expr_t;	/* expression - signed */
     46 
     47 struct trapstate {
     48 	int64_t tstate;
     49 	int64_t tpc;
     50 	int64_t	tnpc;
     51 	int64_t	tt;
     52 };
     53 
     54 typedef struct {
     55 	struct trapframe64	db_tf;
     56 	struct frame64		db_fr;
     57 	struct trapstate	db_ts[5];
     58 	int			db_tl;
     59 	struct fpstate64	db_fpstate;
     60 } db_regs_t;
     61 
     62 /* Current CPU register state */
     63 extern struct cpu_info	*ddb_cpuinfo;
     64 extern db_regs_t	*ddb_regp;
     65 #define	DDB_REGS	ddb_regp
     66 #define	DDB_TF		(&ddb_regp->db_tf)
     67 #define	DDB_FP		(&ddb_regp->db_fpstate)
     68 
     69 /* DDB commands not in db_interface.c */
     70 void	db_dump_ts(db_expr_t, int, db_expr_t, const char *);
     71 void	db_dump_trap(db_expr_t, int, db_expr_t, const char *);
     72 void	db_dump_fpstate(db_expr_t, int, db_expr_t, const char *);
     73 void	db_dump_window(db_expr_t, int, db_expr_t, const char *);
     74 void	db_dump_stack(db_expr_t, int, db_expr_t, const char *);
     75 
     76 #if defined(lint)
     77 #define	PC_REGS(regs)	((regs)->db_tf.tf_pc)
     78 #else
     79 #define	PC_REGS(regs)	((db_addr_t)(regs)->db_tf.tf_pc)
     80 #endif
     81 #define	PC_ADVANCE(regs) do {				\
     82 	vaddr_t n = (regs)->db_tf.tf_npc;		\
     83 	(regs)->db_tf.tf_pc = n;			\
     84 	(regs)->db_tf.tf_npc = n + 4;			\
     85 } while(0)
     86 
     87 #define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
     88 #define	BKPT_INST	0x91d02001	/* breakpoint instruction */
     89 #define	BKPT_SIZE	(4)		/* size of breakpoint inst */
     90 #define	BKPT_SET(inst, addr)	(BKPT_INST)
     91 
     92 #define	IS_BREAKPOINT_TRAP(type, code)	\
     93 	((type) == T_BREAKPOINT || (type) == T_KGDB_EXEC)
     94 #define IS_WATCHPOINT_TRAP(type, code)	\
     95 	((type) ==T_PA_WATCHPT || (type) == T_VA_WATCHPT)
     96 
     97 /*
     98  * Sparc cpus have no hardware single-step.
     99  */
    100 #define SOFTWARE_SSTEP
    101 
    102 boolean_t	db_inst_trap_return(int inst);
    103 boolean_t	db_inst_return(int inst);
    104 boolean_t	db_inst_call(int inst);
    105 boolean_t	db_inst_branch(int inst);
    106 int		db_inst_load(int inst);
    107 int		db_inst_store(int inst);
    108 boolean_t	db_inst_unconditional_flow_transfer(int inst);
    109 db_addr_t	db_branch_taken(int inst, db_addr_t pc, db_regs_t *regs);
    110 
    111 #define inst_trap_return(ins)	db_inst_trap_return(ins)
    112 #define inst_return(ins)	db_inst_return(ins)
    113 #define inst_call(ins)		db_inst_call(ins)
    114 #define inst_branch(ins)	db_inst_branch(ins)
    115 #define inst_load(ins)		db_inst_load(ins)
    116 #define inst_store(ins)		db_inst_store(ins)
    117 #define	inst_unconditional_flow_transfer(ins) \
    118 				db_inst_unconditional_flow_transfer(ins)
    119 #define branch_taken(ins, pc, regs) \
    120 				db_branch_taken((ins), (pc), (regs))
    121 
    122 /* see note in db_interface.c about reversed breakpoint addrs */
    123 #define next_instr_address(pc, bd) \
    124 	((bd) ? (pc) : ddb_regp->db_tf.tf_npc)
    125 
    126 #define DB_MACHINE_COMMANDS
    127 
    128 int kdb_trap(int, struct trapframe64 *);
    129 
    130 /*
    131  * We will use elf symbols in DDB when they work.
    132  */
    133 #if 1
    134 #define	DB_ELF_SYMBOLS
    135 #ifdef __arch64__
    136 #define DB_ELFSIZE	64
    137 #else
    138 #define DB_ELFSIZE	32
    139 #endif
    140 #else
    141 #define DB_AOUT_SYMBOLS
    142 #endif
    143 /*
    144  * KGDB definitions
    145  */
    146 typedef u_long		kgdb_reg_t;
    147 #define KGDB_NUMREGS	125
    148 #define KGDB_BUFLEN	2048
    149 
    150 #endif	/* _SPARC64_DB_MACHDEP_H_ */
    151