commands/swifi/db_machdep.h

   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  *      $Id: db_machdep.h,v 1.1 2003/01/15 21:51:24 mikesw Exp $
  27  */
  28
  29 #ifndef _MACHINE_DB_MACHDEP_H_
  30 #define _MACHINE_DB_MACHDEP_H_
  31
  32 #if 0
  33 //#include <machine/frame.h>
  34 //#include <machine/psl.h>
  35 #endif
  36
  37 #ifndef TRUE
  38 #define TRUE 1
  39 #endif
  40
  41 #ifndef FALSE
  42 #define FALSE 0
  43 #endif
  44
  45 #define i386_saved_state trapframe
  46
  47 typedef vm_offset_t     db_addr_t;      /* address - unsigned */
  48 typedef int             db_expr_t;      /* expression - signed */
  49
  50 typedef struct i386_saved_state db_regs_t;
  51 extern db_regs_t        ddb_regs;       /* register state */
  52 #define DDB_REGS        (&ddb_regs)
  53
  54 #define PC_REGS(regs)   (((regs)->tf_cs & 0xfffc) == 0x08 \
  55                          ? (db_addr_t)(regs)->tf_eip : 0)
  56
  57 #define BKPT_INST       0xcc            /* breakpoint instruction */
  58 #define BKPT_SIZE       (1)             /* size of breakpoint inst */
  59 #define BKPT_SET(inst)  (BKPT_INST)
  60
  61 #define FIXUP_PC_AFTER_BREAK    ddb_regs.tf_eip -= 1;
  62
  63 #define db_clear_single_step(regs)      ((regs)->tf_eflags &= ~PSL_T)
  64 #define db_set_single_step(regs)        ((regs)->tf_eflags |=  PSL_T)
  65
  66 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BPTFLT)
  67 /*
  68  * Watchpoints are not supported.  The debug exception type is in %dr6
  69  * and not yet in the args to this macro.
  70  */
  71 #define IS_WATCHPOINT_TRAP(type, code)  0
  72
  73 #define I_CALL          0xe8
  74 #define I_CALLI         0xff
  75 #define I_RET           0xc3
  76 #define I_IRET          0xcf
  77
  78 #define inst_trap_return(ins)   (((ins)&0xff) == I_IRET)
  79 #define inst_return(ins)        (((ins)&0xff) == I_RET)
  80 #define inst_call(ins)          (((ins)&0xff) == I_CALL || \
  81                                  (((ins)&0xff) == I_CALLI && \
  82                                   ((ins)&0x3800) == 0x1000))
  83 #define inst_load(ins)          0
  84 #define inst_store(ins)         0
  85
  86 /*
  87  * There no interesting addresses below _kstack = 0xefbfe000.  There
  88  * are small absolute values for GUPROF, but we don't want to see them.
  89  * Treat "negative" addresses below _kstack as non-small to allow for
  90  * future reductions of _kstack and to avoid sign extension problems.
  91  *
  92  * There is one interesting symbol above -db_maxoff = 0xffff0000,
  93  * namely _APTD = 0xfffff000.  Accepting this would mess up the
  94  * printing of small negative offsets.  The next largest symbol is
  95  * _APTmap = 0xffc00000.  Accepting this is OK (unless db_maxoff is
  96  * set to >= 0x400000 - (max stack offset)).
  97  */
  98 #define DB_SMALL_VALUE_MAX      0x7fffffff
  99 #define DB_SMALL_VALUE_MIN      (-0x400001)
 100
 101 #endif /* !_MACHINE_DB_MACHDEP_H_ */