sys/arch/alpha/include/db_machdep.h

   1 /* $NetBSD: db_machdep.h,v 1.16 2006/05/17 21:35:45 drochner Exp $ */
   2
   3 /*
   4  * Copyright (c) 1995 Carnegie-Mellon University.
   5  * All rights reserved.
   6  *
   7  * Author: Chris G. Demetriou
   8  *
   9  * Permission to use, copy, modify and distribute this software and
  10  * its documentation is hereby granted, provided that both the copyright
  11  * notice and this permission notice appear in all copies of the
  12  * software, derivative works or modified versions, and any portions
  13  * thereof, and that both notices appear in supporting documentation.
  14  *
  15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  18  *
  19  * Carnegie Mellon requests users of this software to return to
  20  *
  21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  22  *  School of Computer Science
  23  *  Carnegie Mellon University
  24  *  Pittsburgh PA 15213-3890
  25  *
  26  * any improvements or extensions that they make and grant Carnegie the
  27  * rights to redistribute these changes.
  28  */
  29
  30 #ifndef _ALPHA_DB_MACHDEP_H_
  31 #define _ALPHA_DB_MACHDEP_H_
  32
  33 /*
  34  * Machine-dependent defines for new kernel debugger.
  35  */
  36
  37 #include <sys/param.h>
  38 #include <uvm/uvm_extern.h>
  39 #include <machine/frame.h>
  40
  41 typedef vaddr_t         db_addr_t;      /* address - unsigned */
  42 typedef long            db_expr_t;      /* expression - signed */
  43
  44 typedef struct trapframe db_regs_t;
  45 extern db_regs_t        *ddb_regp;      /* pointer to current register state */
  46 #define DDB_REGS        (ddb_regp)
  47
  48 #define PC_REGS(regs)   ((regs)->tf_regs[FRAME_PC])
  49
  50 #define BKPT_ADDR(addr) (addr)          /* breakpoint address */
  51 #define BKPT_INST       0x00000080      /* breakpoint instruction */
  52 #define BKPT_SIZE       (4)             /* size of breakpoint inst */
  53 #define BKPT_SET(inst, addr)    (BKPT_INST)
  54
  55 #define FIXUP_PC_AFTER_BREAK(regs) \
  56         ((regs)->tf_regs[FRAME_PC] -= BKPT_SIZE)
  57
  58 #define SOFTWARE_SSTEP  1               /* no hardware support */
  59 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == ALPHA_KENTRY_IF && \
  60                                          (code) == ALPHA_IF_CODE_BPT)
  61 #define IS_WATCHPOINT_TRAP(type, code)  0
  62
  63 /*
  64  * Functions needed for software single-stepping.
  65  */
  66
  67 bool            db_inst_trap_return(int inst);
  68 bool            db_inst_return(int inst);
  69 bool            db_inst_call(int inst);
  70 bool            db_inst_branch(int inst);
  71 bool            db_inst_load(int inst);
  72 bool            db_inst_store(int inst);
  73 bool            db_inst_unconditional_flow_transfer(int inst);
  74 db_addr_t       db_branch_taken(int inst, db_addr_t pc, db_regs_t *regs);
  75
  76 #define inst_trap_return(ins)   db_inst_trap_return(ins)
  77 #define inst_return(ins)        db_inst_return(ins)
  78 #define inst_call(ins)          db_inst_call(ins)
  79 #define inst_branch(ins)        db_inst_branch(ins)
  80 #define inst_load(ins)          db_inst_load(ins)
  81 #define inst_store(ins)         db_inst_store(ins)
  82 #define inst_unconditional_flow_transfer(ins) \
  83                                 db_inst_unconditional_flow_transfer(ins)
  84 #define branch_taken(ins, pc, regs) \
  85                                 db_branch_taken((ins), (pc), (regs))
  86
  87 /* No delay slots on Alpha. */
  88 #define next_instr_address(v, b) ((db_addr_t) ((b) ? (v) : ((v) + 4)))
  89
  90 u_long  db_register_value(db_regs_t *, int);
  91 int     ddb_trap(unsigned long, unsigned long, unsigned long,
  92             unsigned long, struct trapframe *);
  93
  94 int     alpha_debug(unsigned long, unsigned long, unsigned long,
  95             unsigned long, struct trapframe *);
  96
  97 struct alpha_bus_space;
  98 void    alpha_kgdb_init(const char **, struct alpha_bus_space *);
  99
 100 /*
 101  * We define some of our own commands.
 102  */
 103 #define DB_MACHINE_COMMANDS
 104
 105 /*
 106  * We use Elf64 symbols in DDB.
 107  */
 108 #define DB_ELF_SYMBOLS
 109 #define DB_ELFSIZE      64
 110
 111 /*
 112  * Stuff for KGDB.
 113  */
 114 typedef long            kgdb_reg_t;
 115 #define KGDB_NUMREGS    66      /* from tm-alpha.h, NUM_REGS */
 116 #define KGDB_REG_V0     0
 117 #define KGDB_REG_T0     1
 118 #define KGDB_REG_T1     2
 119 #define KGDB_REG_T2     3
 120 #define KGDB_REG_T3     4
 121 #define KGDB_REG_T4     5
 122 #define KGDB_REG_T5     6
 123 #define KGDB_REG_T6     7
 124 #define KGDB_REG_T7     8
 125 #define KGDB_REG_S0     9
 126 #define KGDB_REG_S1     10
 127 #define KGDB_REG_S2     11
 128 #define KGDB_REG_S3     12
 129 #define KGDB_REG_S4     13
 130 #define KGDB_REG_S5     14
 131 #define KGDB_REG_S6     15      /* FP */
 132 #define KGDB_REG_A0     16
 133 #define KGDB_REG_A1     17
 134 #define KGDB_REG_A2     18
 135 #define KGDB_REG_A3     19
 136 #define KGDB_REG_A4     20
 137 #define KGDB_REG_A5     21
 138 #define KGDB_REG_T8     22
 139 #define KGDB_REG_T9     23
 140 #define KGDB_REG_T10    24
 141 #define KGDB_REG_T11    25
 142 #define KGDB_REG_RA     26
 143 #define KGDB_REG_T12    27
 144 #define KGDB_REG_AT     28
 145 #define KGDB_REG_GP     29
 146 #define KGDB_REG_SP     30
 147 #define KGDB_REG_ZERO   31
 148 #define KGDB_REG_F0     32
 149 #define KGDB_REG_F1     33
 150 #define KGDB_REG_F2     34
 151 #define KGDB_REG_F3     35
 152 #define KGDB_REG_F4     36
 153 #define KGDB_REG_F5     37
 154 #define KGDB_REG_F6     38
 155 #define KGDB_REG_F7     39
 156 #define KGDB_REG_F8     40
 157 #define KGDB_REG_F9     41
 158 #define KGDB_REG_F10    42
 159 #define KGDB_REG_F11    43
 160 #define KGDB_REG_F12    44
 161 #define KGDB_REG_F13    45
 162 #define KGDB_REG_F14    46
 163 #define KGDB_REG_F15    47
 164 #define KGDB_REG_F16    48
 165 #define KGDB_REG_F17    49
 166 #define KGDB_REG_F18    50
 167 #define KGDB_REG_F19    51
 168 #define KGDB_REG_F20    52
 169 #define KGDB_REG_F21    53
 170 #define KGDB_REG_F22    54
 171 #define KGDB_REG_F23    55
 172 #define KGDB_REG_F24    56
 173 #define KGDB_REG_F25    57
 174 #define KGDB_REG_F26    58
 175 #define KGDB_REG_F27    59
 176 #define KGDB_REG_F28    60
 177 #define KGDB_REG_F29    61
 178 #define KGDB_REG_F30    62
 179 #define KGDB_REG_F31    63
 180 #define KGDB_REG_PC     64
 181 #define KGDB_REG_VFP    65
 182
 183 /* Too much?  Must be large enough for register transfer. */
 184 #define KGDB_BUFLEN     1024
 185
 186 #endif  /* _ALPHA_DB_MACHDEP_H_ */