sys/arch/i386/include/db_machdep.h

   1 /*      $NetBSD: db_machdep.h,v 1.26 2007/02/21 22:59:45 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 _I386_DB_MACHDEP_H_
  30 #define _I386_DB_MACHDEP_H_
  31
  32 /*
  33  * Machine-dependent defines for new kernel debugger.
  34  */
  35
  36 #if defined(_KERNEL_OPT)
  37 #include "opt_multiprocessor.h"
  38 #endif
  39 #include <sys/param.h>
  40 #include <uvm/uvm_extern.h>
  41 #include <machine/trap.h>
  42
  43 typedef vaddr_t         db_addr_t;      /* address - unsigned */
  44 typedef long            db_expr_t;      /* expression - signed */
  45
  46 typedef struct trapframe db_regs_t;
  47 #ifndef MULTIPROCESSOR
  48 extern db_regs_t ddb_regs;      /* register state */
  49 #define DDB_REGS        (&ddb_regs)
  50 #else
  51 extern db_regs_t *ddb_regp;
  52 #define DDB_REGS        (ddb_regp)
  53 #define ddb_regs        (*ddb_regp)
  54 #endif
  55
  56 #define PC_REGS(regs)   ((regs)->tf_eip)
  57
  58 #define BKPT_ADDR(addr) (addr)          /* breakpoint address */
  59 #define BKPT_INST       0xcc            /* breakpoint instruction */
  60 #define BKPT_SIZE       (1)             /* size of breakpoint inst */
  61 #define BKPT_SET(inst, addr)    (BKPT_INST)
  62
  63 #define FIXUP_PC_AFTER_BREAK(regs)      ((regs)->tf_eip -= BKPT_SIZE)
  64
  65 #define db_clear_single_step(regs)      ((regs)->tf_eflags &= ~PSL_T)
  66 #define db_set_single_step(regs)        ((regs)->tf_eflags |=  PSL_T)
  67
  68 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BPTFLT)
  69 #define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_TRCTRAP && (code) & 15)
  70
  71 #define I_CALL          0xe8
  72 #define I_CALLI         0xff
  73 #define I_RET           0xc3
  74 #define I_IRET          0xcf
  75
  76 #define inst_trap_return(ins)   (((ins)&0xff) == I_IRET)
  77 #define inst_return(ins)        (((ins)&0xff) == I_RET)
  78 #define inst_call(ins)          (((ins)&0xff) == I_CALL || \
  79                                  (((ins)&0xff) == I_CALLI && \
  80                                   ((ins)&0x3800) == 0x1000))
  81 #define inst_load(ins)          0
  82 #define inst_store(ins)         0
  83
  84 /* access capability and access macros */
  85
  86 #define DB_ACCESS_LEVEL         2       /* access any space */
  87 #define DB_CHECK_ACCESS(addr,size,task)                         \
  88         db_check_access(addr,size,task)
  89 #define DB_PHYS_EQ(task1,addr1,task2,addr2)                     \
  90         db_phys_eq(task1,addr1,task2,addr2)
  91 #define DB_VALID_KERN_ADDR(addr)                                \
  92         ((addr) >= VM_MIN_KERNEL_ADDRESS &&                     \
  93          (addr) < VM_MAX_KERNEL_ADDRESS)
  94 #define DB_VALID_ADDRESS(addr,user)                             \
  95         ((!(user) && DB_VALID_KERN_ADDR(addr)) ||               \
  96          ((user) && (addr) < VM_MAX_ADDRESS))
  97
  98 #if 0
  99 bool            db_check_access(vaddr_t, int, task_t);
 100 bool            db_phys_eq(task_t, vaddr_t, task_t, vaddr_t);
 101 #endif
 102
 103 /* macros for printing OS server dependent task name */
 104
 105 #define DB_TASK_NAME(task)      db_task_name(task)
 106 #define DB_TASK_NAME_TITLE      "COMMAND                "
 107 #define DB_TASK_NAME_LEN        23
 108 #define DB_NULL_TASK_NAME       "?                      "
 109
 110 /*
 111  * Constants for KGDB.
 112  */
 113 typedef long            kgdb_reg_t;
 114 #define KGDB_NUMREGS    16
 115 #define KGDB_BUFLEN     512
 116
 117 #if 0
 118 void            db_task_name(/* task_t */);
 119 #endif
 120
 121 /* macro for checking if a thread has used floating-point */
 122
 123 #define db_thread_fp_used(thread)       ((thread)->pcb->ims.ifps != 0)
 124
 125 int kdb_trap(int, int, db_regs_t *);
 126
 127 /*
 128  * We define some of our own commands
 129  */
 130 #ifdef _KERNEL
 131 #define DB_MACHINE_COMMANDS
 132 #endif
 133
 134 /*
 135  * We use either a.out or Elf32 symbols in DDB.
 136  */
 137 #define DB_AOUT_SYMBOLS
 138 #define DB_ELF_SYMBOLS
 139 #define DB_ELFSIZE      32
 140
 141 extern void db_machine_init(void);
 142
 143 extern void cpu_debug_dump(void);
 144
 145 #endif  /* _I386_DB_MACHDEP_H_ */