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 /* Return the GDB type object for the "standard" data type
 110    of data in register N.  */
 111
 112 #define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N)
 113 struct type *h8500_register_virtual_type PARAMS ((int regno));
 114
 115 /* Initializer for an array of names of registers.
 116    Entries beyond the first NUM_REGS are ignored.  */
 117
 118 #define REGISTER_NAMES \
 119   {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
 120    "ccr","pc", \
 121     "cp","dp","ep","tp" }
 122
 123 /* Register numbers of various important registers.
 124    Note that some of these values are "real" register numbers,
 125    and correspond to the general registers of the machine,
 126    and some are "phony" register numbers which are too large
 127    to be actual register numbers as far as the user is concerned
 128    but do serve to get the desired values when passed to read_register.  */
 129
 130
 131 #define R0_REGNUM       0
 132 #define R1_REGNUM       1
 133 #define R2_REGNUM       2
 134 #define R3_REGNUM       3
 135 #define R4_REGNUM       4
 136 #define R5_REGNUM       5
 137 #define R6_REGNUM       6
 138 #define R7_REGNUM       7
 139
 140 #define SP_REGNUM       R7_REGNUM /* Contains address of top of stack */
 141 #define FP_REGNUM       R6_REGNUM /* Contains address of executing stack frame */
 142
 143 #define CCR_REGNUM      8       /* Contains processor status */
 144 #define PC_REGNUM       9       /* Contains program counter */
 145
 146 #define SEG_C_REGNUM    10      /* Segment registers */
 147 #define SEG_D_REGNUM    11
 148 #define SEG_E_REGNUM    12
 149 #define SEG_T_REGNUM    13
 150
 151 #define NUM_REGS        14
 152
 153 #define PTR_SIZE (minimum_mode ? 2: 4)
 154 #define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff)
 155
 156 /* Store the address of the place in which to copy the structure the
 157    subroutine will return.  This is called from call_function. */
 158
 159 /*#define STORE_STRUCT_RETURN(ADDR, SP) \
 160   { write_register (0, (ADDR)); abort(); }*/
 161
 162 /* Extract from an array REGBUF containing the (raw) register state
 163    a function return value of type TYPE, and copy that, in virtual format,
 164    into VALBUF.  */
 165
 166 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 167   memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE))
 168
 169
 170 /* Write into appropriate registers a function return value
 171    of type TYPE, given in virtual format.  Assumes floats are passed
 172    in d0/d1.  */
 173
 174
 175 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 176   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
 177
 178
 179 /* Extract from an array REGBUF containing the (raw) register state
 180    the address in which a function should return its structure value,
 181    as a CORE_ADDR (or an expression that can be used as one).  */
 182
 183 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
 184 \f
 185
 186 /* Define other aspects of the stack frame.  */
 187
 188 /* A macro that tells us whether the function invocation represented
 189    by FI does not have a frame on the stack associated with it.  If it
 190    does not, FRAMELESS is set to 1, else 0.  */
 191 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 192   (FRAMELESS) = frameless_look_for_prologue(FI)
 193
 194 /* Any function with a frame looks like this
 195    SECOND ARG
 196    FIRST ARG
 197    RET PC
 198    SAVED R2
 199    SAVED R3
 200    SAVED FP   <-FP POINTS HERE
 201    LOCALS0
 202    LOCALS1    <-SP POINTS HERE
 203
 204    */
 205
 206 CORE_ADDR h8500_frame_chain (/* FRAME thisframe */);
 207
 208 #define INIT_EXTRA_FRAME_INFO(fromleaf, fci)  \
 209        (fci)->frame |= read_register(SEG_T_REGNUM) << 16;
 210
 211 #define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME)
 212
 213 #define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
 214
 215 #define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi)
 216
 217 #define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi);
 218
 219 /* Set VAL to the number of args passed to frame described by FI.
 220    Can set VAL to -1, meaning no way to tell.  */
 221
 222 /* We can't tell how many args there are
 223    now that the C compiler delays popping them.  */
 224
 225 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 226
 227 /* Return number of bytes at start of arglist that are not really args.  */
 228
 229 #define FRAME_ARGS_SKIP 0
 230
 231 /* Put here the code to store, into a struct frame_saved_regs,
 232    the addresses of the saved registers of frame described by FRAME_INFO.
 233    This includes special registers such as pc and fp saved in special
 234    ways in the stack frame.  sp is even more special:
 235    the address we return for it IS the sp for the next frame.  */
 236
 237 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 238    frame_find_saved_regs(frame_info, &(frame_saved_regs))
 239 \f
 240
 241 /* Push an empty stack frame, to record the current PC, etc.  */
 242
 243 /*#define PUSH_DUMMY_FRAME      { h8300_push_dummy_frame (); }*/
 244
 245 /* Discard from the stack the innermost frame, restoring all registers.  */
 246
 247 #define POP_FRAME               { h8300_pop_frame (); }
 248
 249 #define SHORT_INT_MAX 32767
 250 #define SHORT_INT_MIN -32768
 251
 252
 253
 254 #define BEFORE_MAIN_LOOP_HOOK   \
 255   hms_before_main_loop();
 256
 257
 258 #define NAMES_HAVE_UNDERSCORE
 259
 260 typedef unsigned short INSN_WORD;
 261
 262 #define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff)
 263
 264 #define read_memory_short(x)  (read_memory_integer(x,2) & 0xffff)
 265 #define DONT_USE_REMOTE
 266
 267
 268 #define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
 269
 270 int minimum_mode;
 271
 272 #define CALL_DUMMY_LENGTH 10
 273
 274 /* Fake variables to make it easy to use 24 bit register pointers */
 275
 276 int h8500_is_trapped_internalvar PARAMS ((char *name));
 277 #define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar
 278
 279 struct value * h8500_value_of_trapped_internalvar (/* struct internalvar *var */);
 280 #define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar
 281
 282 void h8500_set_trapped_internalvar (/* struct internalvar *var, value newval, int bitpos, int bitsize, int offset */);
 283 #define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar
 284
 285
 286
 287 int regoff[NUM_REGS];
 288
 289 CORE_ADDR target_read_sp();
 290 void target_write_sp PARAMS ((CORE_ADDR ));
 291
 292 CORE_ADDR target_read_fp();
 293 void target_write_fp PARAMS ((CORE_ADDR ));
 294
 295 CORE_ADDR target_read_pc();
 296 void target_write_pc PARAMS ((CORE_ADDR ));
 297
 298
 299 #define TARGET_READ_SP() target_read_sp()
 300 #define TARGET_WRITE_SP(x) target_write_sp(x)
 301 #define TARGET_READ_PC() target_read_pc()
 302 #define TARGET_WRITE_PC(x) target_write_pc(x)
 303
 304 #define TARGET_READ_FP() target_read_fp()
 305 #define TARGET_WRITE_FP(x) target_write_fp(x)