db_machdep.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991,1990 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        db_machdep.h,v $
   29  * Revision 2.9  93/01/14  17:28:42  danner
   30  *      Added SAVE/RESTORE macros for multiP usage.
   31  *      [92/12/16  12:42:39  af]
   32  * 
   33  *      Say we only do a.out images.
   34  *      [92/12/10  17:37:02  af]
   35  * 
   36  * Revision 2.8  92/02/19  15:07:56  elf
   37  *      Added db_thread_fp_used.
   38  *      [92/02/19            rpd]
   39  * 
   40  * Revision 2.7  91/10/09  16:06:28  af
   41  *       Revision 2.6.3.1  91/10/05  13:10:32  jeffreyh
   42  *              Added access and task name macros.
   43  *              [91/08/29            tak]
   44  * 
   45  * Revision 2.6.3.1  91/10/05  13:10:32  jeffreyh
   46  *      Added access and task name macros.
   47  *      [91/08/29            tak]
   48  * 
   49  * Revision 2.6  91/05/14  16:05:58  mrt
   50  *      Correcting copyright
   51  *
   52  * Revision 2.5  91/02/05  17:11:17  mrt
   53  *      Changed to new Mach copyright
   54  *      [91/02/01  17:31:24  mrt]
   55  * 
   56  * Revision 2.4  91/01/08  15:10:16  rpd
   57  *      Added dummy inst_load/inst_store macros.
   58  *      [90/12/11            rpd]
   59  * 
   60  * Revision 2.3  90/10/25  14:44:49  rwd
   61  *      Added watchpoint support.
   62  *      [90/10/18            rpd]
   63  * 
   64  * Revision 2.2  90/08/27  21:56:15  dbg
   65  *      Created.
   66  *      [90/07/25            dbg]
   67  * 
   68  */
   69 
   70 #ifndef _I386_DB_MACHDEP_H_
   71 #define _I386_DB_MACHDEP_H_
   72 
   73 /*
   74  * Machine-dependent defines for new kernel debugger.
   75  */
   76 
   77 #include <mach/i386/vm_types.h>
   78 #include <mach/i386/vm_param.h>
   79 #include <i386/thread.h>                /* for thread_status */
   80 #include <i386/eflags.h>
   81 #include <i386/trap.h>
   82 
   83 typedef vm_offset_t     db_addr_t;      /* address - unsigned */
   84 typedef int             db_expr_t;      /* expression - signed */
   85 
   86 typedef struct i386_saved_state db_regs_t;
   87 db_regs_t       ddb_regs;       /* register state */
   88 #define DDB_REGS        (&ddb_regs)
   89 #define SAVE_DDB_REGS           DB_SAVE(db_regs_t, ddb_regs)
   90 #define RESTORE_DDB_REGS        DB_RESTORE(ddb_regs)
   91 
   92 #define PC_REGS(regs)   ((db_addr_t)(regs)->eip)
   93 
   94 #define BKPT_INST       0xcc            /* breakpoint instruction */
   95 #define BKPT_SIZE       (1)             /* size of breakpoint inst */
   96 #define BKPT_SET(inst)  (BKPT_INST)
   97 
   98 #define FIXUP_PC_AFTER_BREAK    ddb_regs.eip -= 1;
   99 
  100 #define db_clear_single_step(regs)      ((regs)->efl &= ~EFL_TF)
  101 #define db_set_single_step(regs)        ((regs)->efl |=  EFL_TF)
  102 
  103 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_INT3)
  104 #define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_WATCHPOINT)
  105 
  106 #define I_CALL          0xe8
  107 #define I_CALLI         0xff
  108 #define I_RET           0xc3
  109 #define I_IRET          0xcf
  110 
  111 #define inst_trap_return(ins)   (((ins)&0xff) == I_IRET)
  112 #define inst_return(ins)        (((ins)&0xff) == I_RET)
  113 #define inst_call(ins)          (((ins)&0xff) == I_CALL || \
  114                                  (((ins)&0xff) == I_CALLI && \
  115                                   ((ins)&0x3800) == 0x1000))
  116 #define inst_load(ins)          0
  117 #define inst_store(ins)         0
  118 
  119 /* access capability and access macros */
  120 
  121 #define DB_ACCESS_LEVEL         2       /* access any space */
  122 #define DB_CHECK_ACCESS(addr,size,task)                         \
  123         db_check_access(addr,size,task)
  124 #define DB_PHYS_EQ(task1,addr1,task2,addr2)                     \
  125         db_phys_eq(task1,addr1,task2,addr2)
  126 #define DB_VALID_KERN_ADDR(addr)                                \
  127         ((addr) >= VM_MIN_KERNEL_ADDRESS &&                     \
  128          (addr) < VM_MAX_KERNEL_ADDRESS)
  129 #define DB_VALID_ADDRESS(addr,user)                             \
  130         ((!(user) && DB_VALID_KERN_ADDR(addr)) ||               \
  131          ((user) && (addr) < VM_MIN_KERNEL_ADDRESS))
  132 
  133 boolean_t       db_check_access(/* vm_offset_t, int, task_t */);
  134 boolean_t       db_phys_eq(/* task_t, vm_offset_t, task_t, vm_offset_t */);
  135 
  136 /* macros for printing OS server dependent task name */
  137 
  138 #define DB_TASK_NAME(task)      db_task_name(task)
  139 #define DB_TASK_NAME_TITLE      "COMMAND                "
  140 #define DB_TASK_NAME_LEN        23
  141 #define DB_NULL_TASK_NAME       "?                      "
  142 
  143 void            db_task_name(/* task_t */);
  144 
  145 /* macro for checking if a thread has used floating-point */
  146 
  147 #define db_thread_fp_used(thread)       ((thread)->pcb->ims.ifps != 0)
  148 
  149 /* only a.out symbol tables */
  150 
  151 #define DB_NO_COFF      1
  152 
  153 #endif  /* _I386_DB_MACHDEP_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/i386/db_machdep.h

FreeBSD/Linux Kernel Cross Reference
sys/i386/db_machdep.h