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 #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 int regoff[];
  92 #define REGISTER_BYTE(N)  (regoff[N])
  93
  94 /* Number of bytes of storage in the actual machine representation
  95    for register N.  */
  96
  97 #define REGISTER_RAW_SIZE(N) h8500_register_size(N)
  98 int h8500_register_size PARAMS ((int regno));
  99
 100 #define REGISTER_VIRTUAL_SIZE(N) h8500_register_size(N)
 101
 102 /* Largest value REGISTER_RAW_SIZE can have.  */
 103
 104 #define MAX_REGISTER_RAW_SIZE 4
 105
 106 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 107
 108 #define MAX_REGISTER_VIRTUAL_SIZE 4
 109
 110 /* Nonzero if register N requires conversion
 111    from raw format to virtual format.  */
 112
 113 #define REGISTER_CONVERTIBLE(N) (0)
 114
 115 /* Convert data from raw format for register REGNUM
 116    to virtual format for register REGNUM.  */
 117
 118 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO)  \
 119 { memcpy ((TO), (FROM), 4); }
 120
 121 /* Convert data from virtual format for register REGNUM
 122    to raw format for register REGNUM.  */
 123
 124 #define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO)   \
 125 { memcpy ((TO), (FROM), 4); }
 126
 127 /* Return the GDB type object for the "standard" data type
 128    of data in register N.  */
 129
 130 #define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N)
 131 struct type *h8500_register_virtual_type PARAMS ((int regno));
 132
 133 /* Initializer for an array of names of registers.
 134    Entries beyond the first NUM_REGS are ignored.  */
 135
 136 #define REGISTER_NAMES \
 137   {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
 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_REGNUM       0
 150 #define R1_REGNUM       1
 151 #define R2_REGNUM       2
 152 #define R3_REGNUM       3
 153 #define R4_REGNUM       4
 154 #define R5_REGNUM       5
 155 #define R6_REGNUM       6
 156 #define R7_REGNUM       7
 157
 158 #define SP_REGNUM       R7_REGNUM /* Contains address of top of stack */
 159 #define FP_REGNUM       R6_REGNUM /* Contains address of executing stack frame */
 160
 161 #define CCR_REGNUM      8       /* Contains processor status */
 162 #define PC_REGNUM       9       /* Contains program counter */
 163
 164 #define SEG_C_REGNUM    10      /* Segment registers */
 165 #define SEG_D_REGNUM    11
 166 #define SEG_E_REGNUM    12
 167 #define SEG_T_REGNUM    13
 168
 169 #define NUM_REGS        14
 170
 171 #define PTR_SIZE (minimum_mode ? 2: 4)
 172 #define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff)
 173
 174 /* Store the address of the place in which to copy the structure the
 175    subroutine will return.  This is called from call_function. */
 176
 177 /*#define STORE_STRUCT_RETURN(ADDR, SP) \
 178   { write_register (0, (ADDR)); abort(); }*/
 179
 180 /* Extract from an array REGBUF containing the (raw) register state
 181    a function return value of type TYPE, and copy that, in virtual format,
 182    into VALBUF.  */
 183
 184 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 185   bcopy ((char *)(REGBUF), VALBUF, TYPE_LENGTH(TYPE))
 186
 187
 188 /* Write into appropriate registers a function return value
 189    of type TYPE, given in virtual format.  Assumes floats are passed
 190    in d0/d1.  */
 191
 192
 193 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 194   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
 195
 196
 197 /* Extract from an array REGBUF containing the (raw) register state
 198    the address in which a function should return its structure value,
 199    as a CORE_ADDR (or an expression that can be used as one).  */
 200
 201 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
 202 \f
 203
 204 /* Define other aspects of the stack frame.  */
 205
 206 /* A macro that tells us whether the function invocation represented
 207    by FI does not have a frame on the stack associated with it.  If it
 208    does not, FRAMELESS is set to 1, else 0.  */
 209 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 210   (FRAMELESS) = frameless_look_for_prologue(FI)
 211
 212 /* Any function with a frame looks like this
 213    SECOND ARG
 214    FIRST ARG
 215    RET PC
 216    SAVED R2
 217    SAVED R3
 218    SAVED FP   <-FP POINTS HERE
 219    LOCALS0
 220    LOCALS1    <-SP POINTS HERE
 221
 222    */
 223
 224 CORE_ADDR h8500_frame_chain PARAMS ((FRAME thisframe));
 225
 226 #define INIT_EXTRA_FRAME_INFO(fromleaf, fci)  \
 227        (fci)->frame |= read_register(SEG_T_REGNUM) << 16;
 228
 229 #define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME)
 230
 231 #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
 232
 233 #define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi)
 234
 235 #define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi);
 236
 237 /* Set VAL to the number of args passed to frame described by FI.
 238    Can set VAL to -1, meaning no way to tell.  */
 239
 240 /* We can't tell how many args there are
 241    now that the C compiler delays popping them.  */
 242
 243 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 244
 245 /* Return number of bytes at start of arglist that are not really args.  */
 246
 247 #define FRAME_ARGS_SKIP 0
 248
 249 /* Put here the code to store, into a struct frame_saved_regs,
 250    the addresses of the saved registers of frame described by FRAME_INFO.
 251    This includes special registers such as pc and fp saved in special
 252    ways in the stack frame.  sp is even more special:
 253    the address we return for it IS the sp for the next frame.  */
 254
 255 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 256    frame_find_saved_regs(frame_info, &(frame_saved_regs))
 257 \f
 258
 259 /* Push an empty stack frame, to record the current PC, etc.  */
 260
 261 /*#define PUSH_DUMMY_FRAME      { h8300_push_dummy_frame (); }*/
 262
 263 /* Discard from the stack the innermost frame, restoring all registers.  */
 264
 265 #define POP_FRAME               { h8300_pop_frame (); }
 266
 267 #define SHORT_INT_MAX 32767
 268 #define SHORT_INT_MIN -32768
 269
 270
 271
 272 #define BEFORE_MAIN_LOOP_HOOK   \
 273   hms_before_main_loop();
 274
 275
 276 #define NAMES_HAVE_UNDERSCORE
 277
 278 typedef unsigned short INSN_WORD;
 279
 280 #define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff)
 281 #define ADDR_BITS_SET(addr) (((addr)))
 282
 283 #define read_memory_short(x)  (read_memory_integer(x,2) & 0xffff)
 284 #define DONT_USE_REMOTE
 285
 286
 287 #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
 288
 289 int minimum_mode;
 290
 291 #define CALL_DUMMY_LENGTH 10
 292
 293 /* Fake variables to make it easy to use 24 bit register pointers */
 294
 295 int h8500_is_trapped_internalvar PARAMS ((char *name));
 296 #define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar
 297
 298 PTR h8500_value_of_trapped_internalvar PARAMS ((struct internalvar *var));
 299 #define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar
 300
 301 void h8500_set_trapped_internalvar PARAMS ((struct internalvar *var, value newval, int bitpos, int bitsize, int offset));
 302 #define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar