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db_machdep.h revision 1.15 
      1 /*	$NetBSD: db_machdep.h,v 1.15 2011/01/14 02:06:30 rmind 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	_SH3_DB_MACHDEP_H_
     30 #define	_SH3_DB_MACHDEP_H_
     31 
     32 /*
     33  * Machine-dependent defines for new kernel debugger.
     34  */
     35 
     36 #include <sys/param.h>
     37 #include <uvm/uvm_extern.h>
     38 #include <sh3/exception.h>
     39 #include <sh3/pcb.h>
     40 
     41 typedef	vaddr_t		db_addr_t;	/* address - unsigned */
     42 typedef	long		db_expr_t;	/* expression - signed */
     43 
     44 typedef struct trapframe db_regs_t;
     45 extern db_regs_t	ddb_regs;	/* register state */
     46 #define	DDB_REGS	(&ddb_regs)
     47 
     48 #define	PC_REGS(regs)	((db_addr_t)(regs)->tf_spc)
     49 #define PC_ADVANCE(regs) ((regs)->tf_spc += BKPT_SIZE)
     50 
     51 #define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
     52 #define	BKPT_INST	0xc3c3		/* breakpoint instruction */
     53 #define	BKPT_SIZE	2		/* size of breakpoint inst */
     54 #define	BKPT_SET(inst, addr)	BKPT_INST
     55 
     56 #define	FIXUP_PC_AFTER_BREAK(regs)	((regs)->tf_spc -= BKPT_SIZE)
     57 
     58 #define	IS_BREAKPOINT_TRAP(type, code)	\
     59 	((type) == EXPEVT_TRAPA && (code) == _SH_TRA_BREAK)
     60 #define	IS_WATCHPOINT_TRAP(type, code)	(false)
     61 
     62 #define	inst_load(ins)		0
     63 #define	inst_store(ins)		0
     64 
     65 /* access capability and access macros */
     66 
     67 #define	DB_ACCESS_LEVEL		2	/* access any space */
     68 #define	DB_CHECK_ACCESS(addr, size, task)				\
     69 	db_check_access(addr, size, task)
     70 #define	DB_PHYS_EQ(task1, addr1, task2, addr2)				\
     71 	db_phys_eq(task1, addr1, task2, addr2)
     72 #define	DB_VALID_KERN_ADDR(addr)					\
     73 	((addr) >= VM_MIN_KERNEL_ADDRESS &&				\
     74 	 (addr) < VM_MAX_KERNEL_ADDRESS)
     75 #define	DB_VALID_ADDRESS(addr, user)					\
     76 	((!(user) && DB_VALID_KERN_ADDR(addr)) ||			\
     77 	 ((user) && (addr) < VM_MAX_ADDRESS))
     78 
     79 /* macros for printing OS server dependent task name */
     80 
     81 #define	DB_TASK_NAME(task)	db_task_name(task)
     82 #define	DB_TASK_NAME_TITLE	"COMMAND                "
     83 #define	DB_TASK_NAME_LEN	23
     84 #define	DB_NULL_TASK_NAME	"?                      "
     85 
     86 /*
     87  * Constants for KGDB.
     88  */
     89 typedef	long	kgdb_reg_t;
     90 #define	KGDB_NUMREGS	59
     91 #define	KGDB_BUFLEN	1024
     92 
     93 /* macro for checking if a thread has used floating-point */
     94 #define	db_thread_fp_used(thread)	((thread)->pcb->ims.ifps != 0)
     95 
     96 int kdb_trap(int, int, db_regs_t *);
     97 bool inst_call(int);
     98 bool inst_return(int);
     99 bool inst_trap_return(int);
    100 
    101 /*
    102  * We use ELF symbols in DDB.
    103  *
    104  */
    105 #define	DB_ELF_SYMBOLS
    106 #define	DB_ELFSIZE	32
    107 
    108 /*
    109  * We have machine-dependent commands.
    110  */
    111 #define	DB_MACHINE_COMMANDS
    112 
    113 extern const char kgdb_devname[];
    114 
    115 #endif	/* !_SH3_DB_MACHDEP_H_ */
    116