sys/arch/sh3/include/db_machdep.h

   1 /*      $NetBSD: db_machdep.h,v 1.13 2007/02/21 22:59:51 thorpej 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@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
  40 typedef vaddr_t         db_addr_t;      /* address - unsigned */
  41 typedef long            db_expr_t;      /* expression - signed */
  42
  43 typedef struct trapframe db_regs_t;
  44 extern db_regs_t        ddb_regs;       /* register state */
  45 #define DDB_REGS        (&ddb_regs)
  46
  47 #define PC_REGS(regs)   ((db_addr_t)(regs)->tf_spc)
  48 #define PC_ADVANCE(regs) ((regs)->tf_spc += BKPT_SIZE)
  49
  50 #define BKPT_ADDR(addr) (addr)          /* breakpoint address */
  51 #define BKPT_INST       0xc3c3          /* breakpoint instruction */
  52 #define BKPT_SIZE       2               /* size of breakpoint inst */
  53 #define BKPT_SET(inst, addr)    BKPT_INST
  54
  55 #define FIXUP_PC_AFTER_BREAK(regs)      ((regs)->tf_spc -= BKPT_SIZE)
  56
  57 #define IS_BREAKPOINT_TRAP(type, code)  \
  58         ((type) == EXPEVT_TRAPA && (code) == _SH_TRA_BREAK)
  59 #define IS_WATCHPOINT_TRAP(type, code)  (false)
  60
  61 #define inst_load(ins)          0
  62 #define inst_store(ins)         0
  63
  64 /* access capability and access macros */
  65
  66 #define DB_ACCESS_LEVEL         2       /* access any space */
  67 #define DB_CHECK_ACCESS(addr, size, task)                               \
  68         db_check_access(addr, size, task)
  69 #define DB_PHYS_EQ(task1, addr1, task2, addr2)                          \
  70         db_phys_eq(task1, addr1, task2, addr2)
  71 #define DB_VALID_KERN_ADDR(addr)                                        \
  72         ((addr) >= VM_MIN_KERNEL_ADDRESS &&                             \
  73          (addr) < VM_MAX_KERNEL_ADDRESS)
  74 #define DB_VALID_ADDRESS(addr, user)                                    \
  75         ((!(user) && DB_VALID_KERN_ADDR(addr)) ||                       \
  76          ((user) && (addr) < VM_MAX_ADDRESS))
  77
  78 /* macros for printing OS server dependent task name */
  79
  80 #define DB_TASK_NAME(task)      db_task_name(task)
  81 #define DB_TASK_NAME_TITLE      "COMMAND                "
  82 #define DB_TASK_NAME_LEN        23
  83 #define DB_NULL_TASK_NAME       "?                      "
  84
  85 /*
  86  * Constants for KGDB.
  87  */
  88 typedef long    kgdb_reg_t;
  89 #define KGDB_NUMREGS    59
  90 #define KGDB_BUFLEN     1024
  91
  92 /* macro for checking if a thread has used floating-point */
  93 #define db_thread_fp_used(thread)       ((thread)->pcb->ims.ifps != 0)
  94
  95 int kdb_trap(int, int, db_regs_t *);
  96 bool inst_call(int);
  97 bool inst_return(int);
  98 bool inst_trap_return(int);
  99
 100 /*
 101  * We use ELF symbols in DDB.
 102  *
 103  */
 104 #define DB_ELF_SYMBOLS
 105 #define DB_ELFSIZE      32
 106
 107 /*
 108  * We have machine-dependent commands.
 109  */
 110 #define DB_MACHINE_COMMANDS
 111
 112 extern const char kgdb_devname[];
 113
 114 #endif  /* !_SH3_DB_MACHDEP_H_ */