gdb/config/h8500/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 #define GDB_TARGET_IS_H8500
  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    (24)
  87
  88 /* Index within `registers' of the first byte of the space for
  89    register N.  */
  90
  91 #define REGISTER_BYTE(N)  (regoff[N])
  92
  93 /* Number of bytes of storage in the actual machine representation
  94    for register N.  */
  95
  96 #define REGISTER_RAW_SIZE(N) h8500_register_size(N)
  97 int h8500_register_size PARAMS ((int regno));
  98
  99 #define REGISTER_VIRTUAL_SIZE(N) h8500_register_size(N)
 100
 101 /* Largest value REGISTER_RAW_SIZE can have.  */
 102
 103 #define MAX_REGISTER_RAW_SIZE 4
 104
 105 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 106
 107 #define MAX_REGISTER_VIRTUAL_SIZE 4
 108
 109 /* Nonzero if register N requires conversion
 110    from raw format to virtual format.  */
 111
 112 #define REGISTER_CONVERTIBLE(N) (0)
 113
 114 /* Convert data from raw format for register REGNUM
 115    to virtual format for register REGNUM.  */
 116
 117 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO)  \
 118 { memcpy ((TO), (FROM), 4); }
 119
 120 /* Convert data from virtual format for register REGNUM
 121    to raw format for register REGNUM.  */
 122
 123 #define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO)   \
 124 { memcpy ((TO), (FROM), 4); }
 125
 126 /* Return the GDB type object for the "standard" data type
 127    of data in register N.  */
 128
 129 #define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N)
 130 struct type *h8500_register_virtual_type PARAMS ((int regno));
 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    "ccr","pc", \
 138     "cp","dp","ep","tp" }
 139
 140 /* Register numbers of various important registers.
 141    Note that some of these values are "real" register numbers,
 142    and correspond to the general registers of the machine,
 143    and some are "phony" register numbers which are too large
 144    to be actual register numbers as far as the user is concerned
 145    but do serve to get the desired values when passed to read_register.  */
 146
 147
 148 #define R0_REGNUM       0
 149 #define R1_REGNUM       1
 150 #define R2_REGNUM       2
 151 #define R3_REGNUM       3
 152 #define R4_REGNUM       4
 153 #define R5_REGNUM       5
 154 #define R6_REGNUM       6
 155 #define R7_REGNUM       7
 156
 157 #define SP_REGNUM       R7_REGNUM /* Contains address of top of stack */
 158 #define FP_REGNUM       R6_REGNUM /* Contains address of executing stack frame */
 159
 160 #define CCR_REGNUM      8       /* Contains processor status */
 161 #define PC_REGNUM       9       /* Contains program counter */
 162
 163 #define SEG_C_REGNUM    10      /* Segment registers */
 164 #define SEG_D_REGNUM    11
 165 #define SEG_E_REGNUM    12
 166 #define SEG_T_REGNUM    13
 167
 168 #define NUM_REGS        14
 169
 170 #define PTR_SIZE (minimum_mode ? 2: 4)
 171 #define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff)
 172
 173 /* Store the address of the place in which to copy the structure the
 174    subroutine will return.  This is called from call_function. */
 175
 176 /*#define STORE_STRUCT_RETURN(ADDR, SP) \
 177   { write_register (0, (ADDR)); abort(); }*/
 178
 179 /* Extract from an array REGBUF containing the (raw) register state
 180    a function return value of type TYPE, and copy that, in virtual format,
 181    into VALBUF.  */
 182
 183 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 184   memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE))
 185
 186
 187 /* Write into appropriate registers a function return value
 188    of type TYPE, given in virtual format.  Assumes floats are passed
 189    in d0/d1.  */
 190
 191
 192 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 193   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
 194
 195
 196 /* Extract from an array REGBUF containing the (raw) register state
 197    the address in which a function should return its structure value,
 198    as a CORE_ADDR (or an expression that can be used as one).  */
 199
 200 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
 201 \f
 202
 203 /* Define other aspects of the stack frame.  */
 204
 205 /* A macro that tells us whether the function invocation represented
 206    by FI does not have a frame on the stack associated with it.  If it
 207    does not, FRAMELESS is set to 1, else 0.  */
 208 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 209   (FRAMELESS) = frameless_look_for_prologue(FI)
 210
 211 /* Any function with a frame looks like this
 212    SECOND ARG
 213    FIRST ARG
 214    RET PC
 215    SAVED R2
 216    SAVED R3
 217    SAVED FP   <-FP POINTS HERE
 218    LOCALS0
 219    LOCALS1    <-SP POINTS HERE
 220
 221    */
 222
 223 CORE_ADDR h8500_frame_chain (/* FRAME thisframe */);
 224
 225 #define INIT_EXTRA_FRAME_INFO(fromleaf, fci)  \
 226        (fci)->frame |= read_register(SEG_T_REGNUM) << 16;
 227
 228 #define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME)
 229
 230 #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
 231
 232 #define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi)
 233
 234 #define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi);
 235
 236 /* Set VAL to the number of args passed to frame described by FI.
 237    Can set VAL to -1, meaning no way to tell.  */
 238
 239 /* We can't tell how many args there are
 240    now that the C compiler delays popping them.  */
 241
 242 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 243
 244 /* Return number of bytes at start of arglist that are not really args.  */
 245
 246 #define FRAME_ARGS_SKIP 0
 247
 248 /* Put here the code to store, into a struct frame_saved_regs,
 249    the addresses of the saved registers of frame described by FRAME_INFO.
 250    This includes special registers such as pc and fp saved in special
 251    ways in the stack frame.  sp is even more special:
 252    the address we return for it IS the sp for the next frame.  */
 253
 254 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 255    frame_find_saved_regs(frame_info, &(frame_saved_regs))
 256 \f
 257
 258 /* Push an empty stack frame, to record the current PC, etc.  */
 259
 260 /*#define PUSH_DUMMY_FRAME      { h8300_push_dummy_frame (); }*/
 261
 262 /* Discard from the stack the innermost frame, restoring all registers.  */
 263
 264 #define POP_FRAME               { h8300_pop_frame (); }
 265
 266 #define SHORT_INT_MAX 32767
 267 #define SHORT_INT_MIN -32768
 268
 269
 270
 271 #define BEFORE_MAIN_LOOP_HOOK   \
 272   hms_before_main_loop();
 273
 274
 275 #define NAMES_HAVE_UNDERSCORE
 276
 277 typedef unsigned short INSN_WORD;
 278
 279 #define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff)
 280
 281 #define read_memory_short(x)  (read_memory_integer(x,2) & 0xffff)
 282 #define DONT_USE_REMOTE
 283
 284
 285 #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
 286
 287 int minimum_mode;
 288
 289 #define CALL_DUMMY_LENGTH 10
 290
 291 /* Fake variables to make it easy to use 24 bit register pointers */
 292
 293 int h8500_is_trapped_internalvar PARAMS ((char *name));
 294 #define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar
 295
 296 struct value * h8500_value_of_trapped_internalvar (/* struct internalvar *var */);
 297 #define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar
 298
 299 void h8500_set_trapped_internalvar (/* struct internalvar *var, value newval, int bitpos, int bitsize, int offset */);
 300 #define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar
 301
 302
 303
 304 int regoff[NUM_REGS];
 305
 306 CORE_ADDR target_read_sp();
 307 void target_write_sp PARAMS ((CORE_ADDR ));
 308
 309 CORE_ADDR target_read_fp();
 310 void target_write_fp PARAMS ((CORE_ADDR ));
 311
 312 CORE_ADDR target_read_pc();
 313 void target_write_pc PARAMS ((CORE_ADDR ));
 314
 315
 316 #define TARGET_READ_SP() target_read_sp()
 317 #define TARGET_WRITE_SP(x) target_write_sp(x)
 318 #define TARGET_READ_PC() target_read_pc()
 319 #define TARGET_WRITE_PC(x) target_write_pc(x)
 320
 321 #define TARGET_READ_FP() target_read_fp()
 322 #define TARGET_WRITE_FP(x) target_write_fp(x)