sys/arch/amd64/include/db_machdep.h

   1 /*      $NetBSD: db_machdep.h,v 1.8 2009/03/11 04:16:43 yamt 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 _X86_64_DB_MACHDEP_H_
  30 #define _X86_64_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 /* defined(_KERNEL_OPT) */
  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_rip)
  57 #define PC_ADVANCE(r)  ((r)->tf_rip += BKPT_SIZE)
  58
  59 #define BKPT_ADDR(addr) (addr)          /* breakpoint address */
  60 #define BKPT_INST       0xcc            /* breakpoint instruction */
  61 #define BKPT_SIZE       (1)             /* size of breakpoint inst */
  62 #define BKPT_SET(inst, addr)    (BKPT_INST)
  63
  64 #define FIXUP_PC_AFTER_BREAK(regs)      ((regs)->tf_rip -= BKPT_SIZE)
  65
  66 #define db_clear_single_step(regs)      ((regs)->tf_rflags &= ~PSL_T)
  67 #define db_set_single_step(regs)        ((regs)->tf_rflags |=  PSL_T)
  68
  69 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BPTFLT)
  70 #define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_TRCTRAP && (code) & 15)
  71
  72 #define I_CALL          0xe8
  73 #define I_CALLI         0xff
  74 #define I_RET           0xc3
  75 #define I_IRET          0xcf
  76
  77 #define inst_trap_return(ins)   (((ins)&0xff) == I_IRET)
  78 #define inst_return(ins)        (((ins)&0xff) == I_RET)
  79 #define inst_call(ins)          (((ins)&0xff) == I_CALL || \
  80                                  (((ins)&0xff) == I_CALLI && \
  81                                   ((ins)&0x3800) == 0x1000))
  82 #define inst_load(ins)          0
  83 #define inst_store(ins)         0
  84
  85 /* access capability and access macros */
  86
  87 #define DB_ACCESS_LEVEL         2       /* access any space */
  88 #define DB_CHECK_ACCESS(addr,size,task)                         \
  89         db_check_access(addr,size,task)
  90 #define DB_PHYS_EQ(task1,addr1,task2,addr2)                     \
  91         db_phys_eq(task1,addr1,task2,addr2)
  92 #define DB_VALID_KERN_ADDR(addr)                                \
  93         ((addr) >= VM_MIN_KERNEL_ADDRESS &&                     \
  94          (addr) < VM_MAX_KERNEL_ADDRESS)
  95 #define DB_VALID_ADDRESS(addr,user)                             \
  96         ((!(user) && DB_VALID_KERN_ADDR(addr)) ||               \
  97          ((user) && (addr) < VM_MAX_ADDRESS))
  98
  99 #if 0
 100 bool            db_check_access(vaddr_t, int, task_t);
 101 bool            db_phys_eq(task_t, vaddr_t, task_t, vaddr_t);
 102 #endif
 103
 104 /* macros for printing OS server dependent task name */
 105
 106 #define DB_TASK_NAME(task)      db_task_name(task)
 107 #define DB_TASK_NAME_TITLE      "COMMAND                "
 108 #define DB_TASK_NAME_LEN        23
 109 #define DB_NULL_TASK_NAME       "?                      "
 110
 111 /*
 112  * Constants for KGDB.
 113  */
 114 typedef long            kgdb_reg_t;
 115 #define KGDB_NUMREGS    16
 116 #define KGDB_BUFLEN     512
 117
 118 #if 0
 119 void            db_task_name(/* task_t */);
 120 #endif
 121
 122 /* macro for checking if a thread has used floating-point */
 123
 124 #define db_thread_fp_used(thread)       ((thread)->pcb->ims.ifps != 0)
 125
 126 int kdb_trap(int, int, db_regs_t *);
 127
 128 /*
 129  * We define some of our own commands
 130  */
 131 #define DB_MACHINE_COMMANDS
 132
 133 #define DB_ELF_SYMBOLS
 134 #define DB_ELFSIZE      64
 135
 136 extern void db_machine_init(void);
 137
 138 extern void cpu_debug_dump(void);
 139
 140 #endif  /* _X86_64_DB_MACHDEP_H_ */