gdb/config/d10v/tm-d10v.h

   1 /* Target-specific definition for the Mitsubishi D10V
   2    Copyright (C) 1996 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 /* Contributed by Martin Hunt, hunt@cygnus.com */
  21
  22 #define GDB_TARGET_IS_D10V
  23
  24 /* Define the bit, byte, and word ordering of the machine.  */
  25
  26 #define TARGET_BYTE_ORDER       BIG_ENDIAN
  27
  28 /* Offset from address of function to start of its code.
  29    Zero on most machines.  */
  30
  31 #define FUNCTION_START_OFFSET 0
  32
  33 /* these are the addresses the D10V-EVA board maps data */
  34 /* and instruction memory to. */
  35
  36 #define DMEM_START      0x0000000
  37 #define IMEM_START      0x1000000
  38 #define STACK_START     0x0007ffe
  39
  40 #ifdef __STDC__         /* Forward decls for prototypes */
  41 struct frame_info;
  42 struct frame_saved_regs;
  43 struct type;
  44 struct value;
  45 #endif
  46
  47 /* Advance PC across any function entry prologue instructions
  48    to reach some "real" code.  */
  49
  50 extern CORE_ADDR d10v_skip_prologue ();
  51 #define SKIP_PROLOGUE(ip) \
  52     {(ip) = d10v_skip_prologue(ip);}
  53
  54
  55 /* Stack grows downward.  */
  56 #define INNER_THAN <
  57
  58 /* for a breakpoint, use "dbt || nop" */
  59 #define BREAKPOINT {0x2f, 0x90, 0x5e, 0x00}
  60
  61 /* If your kernel resets the pc after the trap happens you may need to
  62    define this before including this file.  */
  63 #define DECR_PC_AFTER_BREAK 4
  64
  65 #define REGISTER_NAMES \
  66 { "r0", "r1", "r2", "r3", "r4", "r5",  "r6", "r7", \
  67     "r8", "r9", "r10","r11","r12", "r13", "r14","sp",\
  68     "psw","bpsw","pc","bpc", "cr4", "cr5", "cr6", "rpt_c",\
  69     "rpt_s","rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",\
  70     "imap0","imap1","dmap","a0", "a1"\
  71     }
  72
  73 #define NUM_REGS 37
  74
  75 /* Register numbers of various important registers.
  76    Note that some of these values are "real" register numbers,
  77    and correspond to the general registers of the machine,
  78    and some are "phony" register numbers which are too large
  79    to be actual register numbers as far as the user is concerned
  80    but do serve to get the desired values when passed to read_register.  */
  81
  82 #define R0_REGNUM       0
  83 #define LR_REGNUM       13
  84 #define SP_REGNUM       15
  85 #define FP_REGNUM       11
  86 #define PC_REGNUM       18
  87 #define PSW_REGNUM      16
  88 #define IMAP0_REGNUM    32
  89 #define IMAP1_REGNUM    33
  90 #define DMAP_REGNUM     34
  91 #define A0_REGNUM       35
  92
  93 /* Say how much memory is needed to store a copy of the register set */
  94 #define REGISTER_BYTES    ((NUM_REGS-2)*2+16)
  95
  96 /* Index within `registers' of the first byte of the space for
  97    register N.  */
  98
  99 #define REGISTER_BYTE(N)  \
 100 ( ((N) > A0_REGNUM) ? ( ((N)-A0_REGNUM)*8 + A0_REGNUM*2 ) : ((N) * 2) )
 101
 102 /* Number of bytes of storage in the actual machine representation
 103    for register N.  */
 104
 105 #define REGISTER_RAW_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : 2 )
 106
 107 /* Number of bytes of storage in the program's representation
 108    for register N.  */
 109 #define REGISTER_VIRTUAL_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : ( ((N) == PC_REGNUM || (N) == SP_REGNUM) ? 4 : 2 ))
 110
 111 /* Largest value REGISTER_RAW_SIZE can have.  */
 112
 113 #define MAX_REGISTER_RAW_SIZE 8
 114
 115 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 116
 117 #define MAX_REGISTER_VIRTUAL_SIZE 8
 118
 119 /* Return the GDB type object for the "standard" data type
 120    of data in register N.  */
 121
 122 #define REGISTER_VIRTUAL_TYPE(N) \
 123 ( ((N) < A0_REGNUM ) ? ((N) == PC_REGNUM || (N) == SP_REGNUM ? builtin_type_long : builtin_type_short) : builtin_type_long_long)
 124
 125
 126 /* convert $pc and $sp to/from virtual addresses */
 127 #define REGISTER_CONVERTIBLE(N) ((N) == PC_REGNUM || (N) == SP_REGNUM)
 128 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
 129 { \
 130     ULONGEST x = extract_unsigned_integer ((FROM), REGISTER_RAW_SIZE (REGNUM)); \
 131     if (REGNUM == PC_REGNUM) x = (x << 2) | IMEM_START; \
 132     else x |= DMEM_START; \
 133     store_unsigned_integer ((TO), TYPE_LENGTH(TYPE), x); \
 134 }
 135 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
 136 { \
 137     ULONGEST x = extract_unsigned_integer ((FROM), TYPE_LENGTH(TYPE)); \
 138     x &= 0x3ffff; \
 139     if (REGNUM == PC_REGNUM) x >>= 2; \
 140     store_unsigned_integer ((TO), 2, x); \
 141 }
 142
 143 #define D10V_MAKE_DADDR(x) ((x) | DMEM_START)
 144 #define D10V_MAKE_IADDR(x) (((x) << 2) | IMEM_START)
 145
 146 #define D10V_DADDR_P(X) (((X) & 0x3000000) == DMEM_START)
 147 #define D10V_IADDR_P(X) (((X) & 0x3000000) == IMEM_START)
 148
 149 #define D10V_CONVERT_IADDR_TO_RAW(X) (((X) >> 2) & 0xffff)
 150 #define D10V_CONVERT_DADDR_TO_RAW(X) ((X) & 0xffff)
 151
 152 #define ARG1_REGNUM R0_REGNUM
 153 #define ARGN_REGNUM 3
 154 #define RET1_REGNUM R0_REGNUM
 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    We store structs through a pointer passed in the first Argument
 160    register. */
 161
 162 #define STORE_STRUCT_RETURN(ADDR, SP) \
 163     { write_register (ARG1_REGNUM, (ADDR));  }
 164
 165
 166 /* Write into appropriate registers a function return value
 167    of type TYPE, given in virtual format.
 168
 169    Things always get returned in RET1_REGNUM, RET2_REGNUM, ... */
 170
 171 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 172   write_register_bytes (REGISTER_BYTE(RET1_REGNUM), VALBUF, TYPE_LENGTH (TYPE))
 173
 174
 175 /* Extract from an array REGBUF containing the (raw) register state
 176    the address in which a function should return its structure value,
 177    as a CORE_ADDR (or an expression that can be used as one).  */
 178
 179 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
 180      (extract_address ((REGBUF) + REGISTER_BYTE (ARG1_REGNUM), REGISTER_RAW_SIZE (ARG1_REGNUM)) | DMEM_START)
 181 \f
 182
 183 /* Define other aspects of the stack frame.
 184    we keep a copy of the worked out return pc lying around, since it
 185    is a useful bit of info */
 186
 187 #define EXTRA_FRAME_INFO \
 188     CORE_ADDR return_pc; \
 189     int frameless; \
 190     int size;
 191
 192 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 193     d10v_init_extra_frame_info(fromleaf, fi)
 194
 195 extern void d10v_init_extra_frame_info PARAMS (( int fromleaf, struct frame_info *fi ));
 196
 197 /* A macro that tells us whether the function invocation represented
 198    by FI does not have a frame on the stack associated with it.  If it
 199    does not, FRAMELESS is set to 1, else 0.  */
 200
 201 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 202   (FRAMELESS) = frameless_look_for_prologue(FI)
 203
 204 #define FRAME_CHAIN(FRAME)       d10v_frame_chain(FRAME)
 205 #define FRAME_CHAIN_VALID(chain,frame)  \
 206       ((chain) != 0 && (frame) != 0 && (frame)->pc > IMEM_START)
 207 #define FRAME_SAVED_PC(FRAME)    ((FRAME)->return_pc)
 208 #define FRAME_ARGS_ADDRESS(fi)   (fi)->frame
 209 #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
 210
 211 /* Immediately after a function call, return the saved pc.  We can't */
 212 /* use frame->return_pc beause that is determined by reading R13 off the */
 213 /*stack and that may not be written yet. */
 214
 215 #define SAVED_PC_AFTER_CALL(frame) ((read_register(LR_REGNUM) << 2) | IMEM_START)
 216
 217 /* Set VAL to the number of args passed to frame described by FI.
 218    Can set VAL to -1, meaning no way to tell.  */
 219 /* We can't tell how many args there are */
 220
 221 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 222
 223 /* Return number of bytes at start of arglist that are not really args.  */
 224
 225 #define FRAME_ARGS_SKIP 0
 226
 227
 228 /* Put here the code to store, into a struct frame_saved_regs,
 229    the addresses of the saved registers of frame described by FRAME_INFO.
 230    This includes special registers such as pc and fp saved in special
 231    ways in the stack frame.  sp is even more special:
 232    the address we return for it IS the sp for the next frame.  */
 233
 234 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 235    d10v_frame_find_saved_regs(frame_info, &(frame_saved_regs))
 236
 237 extern void d10v_frame_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *));
 238
 239 #define NAMES_HAVE_UNDERSCORE
 240
 241
 242 /* DUMMY FRAMES.  Need these to support inferior function calls.  They
 243    work like this on D10V: First we set a breakpoint at 0 or __start.
 244    Then we push all the registers onto the stack.  Then put the
 245    function arguments in the proper registers and set r13 to our
 246    breakpoint address.  Finally, the PC is set to the start of the
 247    function being called (no JSR/BSR insn).  When it hits the
 248    breakpoint, clear the break point and pop the old register contents
 249    off the stack.  */
 250
 251 extern void d10v_pop_frame PARAMS ((struct frame_info *frame));
 252 #define POP_FRAME generic_pop_current_frame (d10v_pop_frame)
 253
 254 #define USE_GENERIC_DUMMY_FRAMES
 255 #define CALL_DUMMY                   {0}
 256 #define CALL_DUMMY_START_OFFSET      (0)
 257 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
 258 #define CALL_DUMMY_LOCATION          AT_ENTRY_POINT
 259 #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP)
 260 #define CALL_DUMMY_ADDRESS()         entry_point_address ()
 261 extern CORE_ADDR d10v_push_return_address PARAMS ((CORE_ADDR pc, CORE_ADDR sp));
 262 #define PUSH_RETURN_ADDRESS(PC, SP)  d10v_push_return_address (PC, SP)
 263
 264 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP)
 265 /* #define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 ) */
 266
 267 #define PUSH_DUMMY_FRAME        generic_push_dummy_frame ()
 268
 269 /* override the default get_saved_register function with one that
 270    takes account of generic CALL_DUMMY frames */
 271 #define GET_SAVED_REGISTER
 272 #define get_saved_register generic_get_saved_register
 273
 274 #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
 275     sp = d10v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))
 276 extern CORE_ADDR d10v_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR));
 277
 278
 279 /* Extract from an array REGBUF containing the (raw) register state
 280    a function return value of type TYPE, and copy that, in virtual format,
 281    into VALBUF.  */
 282
 283 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 284 d10v_extract_return_value(TYPE, REGBUF, VALBUF)
 285   extern void
 286 d10v_extract_return_value PARAMS ((struct type *, char *, char *));
 287
 288
 289 #define REGISTER_SIZE 2
 290
 291 #ifdef CC_HAS_LONG_LONG
 292 #  define LONGEST long long
 293 #else
 294 #  define LONGEST long
 295 #endif
 296 #define ULONGEST unsigned LONGEST
 297
 298 void d10v_write_pc PARAMS ((CORE_ADDR val, int pid));
 299 CORE_ADDR d10v_read_pc PARAMS ((int pid));
 300 void d10v_write_sp PARAMS ((CORE_ADDR val));
 301 CORE_ADDR d10v_read_sp PARAMS ((void));
 302 void d10v_write_fp PARAMS ((CORE_ADDR val));
 303 CORE_ADDR d10v_read_fp PARAMS ((void));
 304
 305 #define TARGET_READ_PC(pid)             d10v_read_pc (pid)
 306 #define TARGET_WRITE_PC(val,pid)        d10v_write_pc (val, pid)
 307 #define TARGET_READ_FP()                d10v_read_fp ()
 308 #define TARGET_WRITE_FP(val)            d10v_write_fp (val)
 309 #define TARGET_READ_SP()                d10v_read_sp ()
 310 #define TARGET_WRITE_SP(val)            d10v_write_sp (val)
 311
 312 /* Number of bits in the appropriate type */
 313 #define TARGET_INT_BIT (2 * TARGET_CHAR_BIT)
 314 #define TARGET_PTR_BIT (4 * TARGET_CHAR_BIT)
 315 #define TARGET_DOUBLE_BIT (4 * TARGET_CHAR_BIT)
 316 #define TARGET_LONG_DOUBLE_BIT (8 * TARGET_CHAR_BIT)