gdb/tm-h8500.h

   1 /* Parameters for execution on a H8/500 series machine.
   2    Copyright (C) 1993 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* Contributed by Steve Chamberlain sac@cygnus.com */
  21
  22
  23
  24 #define IEEE_FLOAT 1
  25
  26 /* Define the bit, byte, and word ordering of the machine.  */
  27
  28 #define TARGET_BYTE_ORDER BIG_ENDIAN
  29
  30 #undef TARGET_INT_BIT
  31 #define TARGET_INT_BIT 16
  32
  33 #undef TARGET_PTR_BIT
  34 #define TARGET_PTR_BIT (minimum_mode ? 16 : 32)
  35
  36
  37 /* Offset from address of function to start of its code.
  38    Zero on most machines.  */
  39
  40 #define FUNCTION_START_OFFSET 0
  41
  42 /* Advance PC across any function entry prologue instructions
  43    to reach some "real" code.  */
  44
  45 #define SKIP_PROLOGUE(ip)   {(ip) = h8500_skip_prologue(ip);}
  46 extern CORE_ADDR h8500_skip_prologue ();
  47
  48
  49 /* Immediately after a function call, return the saved pc.
  50    Can't always go through the frames for this because on some machines
  51    the new frame is not set up until the new function executes
  52    some instructions.  */
  53
  54 #define SAVED_PC_AFTER_CALL(frame) saved_pc_after_call(frame)
  55
  56
  57 /* Stack grows downward.  */
  58
  59 #define INNER_THAN <
  60
  61 /* Illegal instruction - used by the simulator for breakpoint
  62    detection */
  63 #define BREAKPOINT {0x0b}
  64
  65
  66 /* If your kernel resets the pc after the trap happens you may need to
  67    define this before including this file.  */
  68
  69 #define DECR_PC_AFTER_BREAK 0
  70
  71
  72 /* Nonzero if instruction at PC is a return instruction.  */
  73
  74 #define ABOUT_TO_RETURN(pc) about_to_return(pc)
  75
  76 /* Return 1 if P points to an invalid floating point value.  */
  77
  78 #define INVALID_FLOAT(p, len) 0   /* Just a first guess; not checked */
  79
  80 /* Say how long registers are.  */
  81
  82 #define REGISTER_TYPE  unsigned long
  83
  84 /* Say how much memory is needed to store a copy of the register set */
  85
  86 #define REGISTER_BYTES    ((NUM_REGS)*4)
  87
  88 /* Index within `registers' of the first byte of the space for
  89    register N.  */
  90
  91 #define REGISTER_BYTE(N)  ((N)*4)
  92
  93 /* Number of bytes of storage in the actual machine representation
  94    for register N.  */
  95
  96 #define REGISTER_RAW_SIZE(N)  register_raw_size(N)
  97
  98 #define REGISTER_VIRTUAL_SIZE(N) register_virtual_size(N)
  99
 100 /* Largest value REGISTER_RAW_SIZE can have.  */
 101
 102 #define MAX_REGISTER_RAW_SIZE 4
 103
 104 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 105
 106 #define MAX_REGISTER_VIRTUAL_SIZE 4
 107
 108 /* Nonzero if register N requires conversion
 109    from raw format to virtual format.  */
 110
 111 #define REGISTER_CONVERTIBLE(N) 1
 112
 113 /* Convert data from raw format for register REGNUM
 114    to virtual format for register REGNUM.  */
 115
 116 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO)  \
 117      register_convert_to_virtual(REGNUM, FROM, TO)
 118
 119 /* Convert data from virtual format for register REGNUM
 120    to raw format for register REGNUM.  */
 121
 122 #define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO)   \
 123    register_convert_to_raw(REGNUM, FROM, TO)
 124
 125 /* Return the GDB type object for the "standard" data type
 126    of data in register N.  */
 127 struct type *register_virtual_type();
 128
 129 #define REGISTER_VIRTUAL_TYPE(N) register_virtual_type(N)
 130
 131
 132 /* Initializer for an array of names of registers.
 133    Entries beyond the first NUM_REGS are ignored.  */
 134
 135 #define REGISTER_NAMES \
 136   {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
 137    "pr0", "pr1","pr2","pr3","pr4","pr5","pr6","pr7", \
 138    "ccr","pc", \
 139     "cp","dp","ep","tp" }
 140
 141 /* Register numbers of various important registers.
 142    Note that some of these values are "real" register numbers,
 143    and correspond to the general registers of the machine,
 144    and some are "phony" register numbers which are too large
 145    to be actual register numbers as far as the user is concerned
 146    but do serve to get the desired values when passed to read_register.  */
 147
 148
 149 #define R0              0
 150 #define R1              1
 151 #define R2              2
 152 #define R3              3
 153 #define R4              4
 154 #define R5              5
 155 #define R6              6
 156 #define R7              7
 157
 158 #define PR0             8      /* R0-R7 with seg prefixed */
 159 #define PR1             9
 160 #define PR2             10
 161 #define PR3             11
 162 #define PR4             12
 163 #define PR5             13
 164 #define PR6             14
 165 #define PR7             15
 166
 167 #define SP_REGNUM       PR7     /* Contains address of top of stack */
 168 #define FP_REGNUM       PR6     /* Contains address of executing stack frame */
 169
 170 #define CCR_REGNUM      16      /* Contains processor status */
 171 #define PC_REGNUM       17      /* Contains program counter */
 172
 173 #define SEG_C           18      /* Segment registers */
 174 #define SEG_D           19
 175 #define SEG_E           20
 176 #define SEG_T           21
 177
 178 #define NUM_REGS        22
 179
 180 #define PTR_SIZE (minimum_mode ? 2: 4)
 181 #define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff)
 182
 183 /* Store the address of the place in which to copy the structure the
 184    subroutine will return.  This is called from call_function. */
 185
 186 /*#define STORE_STRUCT_RETURN(ADDR, SP) \
 187   { write_register (0, (ADDR)); abort(); }*/
 188
 189 /* Extract from an array REGBUF containing the (raw) register state
 190    a function return value of type TYPE, and copy that, in virtual format,
 191    into VALBUF.  */
 192
 193 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 194   bcopy ((char *)(REGBUF), VALBUF, TYPE_LENGTH(TYPE))
 195
 196
 197 /* Write into appropriate registers a function return value
 198    of type TYPE, given in virtual format.  Assumes floats are passed
 199    in d0/d1.  */
 200
 201
 202 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 203   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
 204
 205
 206 /* Extract from an array REGBUF containing the (raw) register state
 207    the address in which a function should return its structure value,
 208    as a CORE_ADDR (or an expression that can be used as one).  */
 209
 210 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
 211 \f
 212
 213 /* Define other aspects of the stack frame.  */
 214
 215 /* A macro that tells us whether the function invocation represented
 216    by FI does not have a frame on the stack associated with it.  If it
 217    does not, FRAMELESS is set to 1, else 0.  */
 218 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 219   (FRAMELESS) = frameless_look_for_prologue(FI)
 220
 221 /* Any function with a frame looks like this
 222    SECOND ARG
 223    FIRST ARG
 224    RET PC
 225    SAVED R2
 226    SAVED R3
 227    SAVED FP   <-FP POINTS HERE
 228    LOCALS0
 229    LOCALS1    <-SP POINTS HERE
 230
 231    */
 232 #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
 233
 234 #define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi)
 235
 236 #define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi);
 237
 238 /* Set VAL to the number of args passed to frame described by FI.
 239    Can set VAL to -1, meaning no way to tell.  */
 240
 241 /* We can't tell how many args there are
 242    now that the C compiler delays popping them.  */
 243
 244 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 245
 246 /* Return number of bytes at start of arglist that are not really args.  */
 247
 248 #define FRAME_ARGS_SKIP 0
 249
 250 /* Put here the code to store, into a struct frame_saved_regs,
 251    the addresses of the saved registers of frame described by FRAME_INFO.
 252    This includes special registers such as pc and fp saved in special
 253    ways in the stack frame.  sp is even more special:
 254    the address we return for it IS the sp for the next frame.  */
 255
 256 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 257    frame_find_saved_regs(frame_info, &(frame_saved_regs))
 258 \f
 259
 260 /* Push an empty stack frame, to record the current PC, etc.  */
 261
 262 /*#define PUSH_DUMMY_FRAME      { h8300_push_dummy_frame (); }*/
 263
 264 /* Discard from the stack the innermost frame, restoring all registers.  */
 265
 266 #define POP_FRAME               { h8300_pop_frame (); }
 267
 268 #define SHORT_INT_MAX 32767
 269 #define SHORT_INT_MIN -32768
 270
 271
 272
 273 #define BEFORE_MAIN_LOOP_HOOK   \
 274   hms_before_main_loop();
 275
 276
 277 #define NAMES_HAVE_UNDERSCORE
 278
 279 typedef unsigned short INSN_WORD;
 280
 281 #define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff)
 282 #define ADDR_BITS_SET(addr) (((addr)))
 283
 284 #define read_memory_short(x)  (read_memory_integer(x,2) & 0xffff)
 285 #define DONT_USE_REMOTE
 286
 287
 288 #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
 289
 290
 291 int minimum_mode;
 292
 293 #define CALL_DUMMY_LENGTH 10