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(lhs,rhs) ((lhs) < (rhs))
  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","r15",\
  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
 182 /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of
 183    EXTRACT_RETURN_VALUE?  GCC_P is true if compiled with gcc
 184    and TYPE is the type (which is known to be struct, union or array).
 185
 186    The d10v returns anything less than 8 bytes in size in
 187    registers. */
 188
 189 extern use_struct_convention_fn d10v_use_struct_convention;
 190 #define USE_STRUCT_CONVENTION(gcc_p, type) d10v_use_struct_convention (gcc_p, type)
 191
 192 \f
 193
 194 /* Define other aspects of the stack frame.
 195    we keep a copy of the worked out return pc lying around, since it
 196    is a useful bit of info */
 197
 198 #define EXTRA_FRAME_INFO \
 199     CORE_ADDR return_pc; \
 200     int frameless; \
 201     int size;
 202
 203 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 204     d10v_init_extra_frame_info(fromleaf, fi)
 205
 206 extern void d10v_init_extra_frame_info PARAMS (( int fromleaf, struct frame_info *fi ));
 207
 208 /* A macro that tells us whether the function invocation represented
 209    by FI does not have a frame on the stack associated with it.  If it
 210    does not, FRAMELESS is set to 1, else 0.  */
 211
 212 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 213   (FRAMELESS) = frameless_look_for_prologue(FI)
 214
 215 #define FRAME_CHAIN(FRAME)       d10v_frame_chain(FRAME)
 216 extern int d10v_frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *));
 217 #define FRAME_CHAIN_VALID(chain, thisframe) d10v_frame_chain_valid (chain, thisframe)
 218 #define FRAME_SAVED_PC(FRAME)    ((FRAME)->return_pc)
 219 #define FRAME_ARGS_ADDRESS(fi)   (fi)->frame
 220 #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
 221
 222 /* Immediately after a function call, return the saved pc.  We can't */
 223 /* use frame->return_pc beause that is determined by reading R13 off the */
 224 /*stack and that may not be written yet. */
 225
 226 #define SAVED_PC_AFTER_CALL(frame) ((read_register(LR_REGNUM) << 2) | IMEM_START)
 227
 228 /* Set VAL to the number of args passed to frame described by FI.
 229    Can set VAL to -1, meaning no way to tell.  */
 230 /* We can't tell how many args there are */
 231
 232 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 233
 234 /* Return number of bytes at start of arglist that are not really args.  */
 235
 236 #define FRAME_ARGS_SKIP 0
 237
 238
 239 /* Put here the code to store, into a struct frame_saved_regs,
 240    the addresses of the saved registers of frame described by FRAME_INFO.
 241    This includes special registers such as pc and fp saved in special
 242    ways in the stack frame.  sp is even more special:
 243    the address we return for it IS the sp for the next frame.  */
 244
 245 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 246    d10v_frame_find_saved_regs(frame_info, &(frame_saved_regs))
 247
 248 extern void d10v_frame_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *));
 249
 250 #define NAMES_HAVE_UNDERSCORE
 251
 252
 253 /* DUMMY FRAMES.  Need these to support inferior function calls.  They
 254    work like this on D10V: First we set a breakpoint at 0 or __start.
 255    Then we push all the registers onto the stack.  Then put the
 256    function arguments in the proper registers and set r13 to our
 257    breakpoint address.  Finally, the PC is set to the start of the
 258    function being called (no JSR/BSR insn).  When it hits the
 259    breakpoint, clear the break point and pop the old register contents
 260    off the stack.  */
 261
 262 extern void d10v_pop_frame PARAMS ((struct frame_info *frame));
 263 #define POP_FRAME generic_pop_current_frame (d10v_pop_frame)
 264
 265 #define USE_GENERIC_DUMMY_FRAMES
 266 #define CALL_DUMMY                   {0}
 267 #define CALL_DUMMY_START_OFFSET      (0)
 268 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
 269 #define CALL_DUMMY_LOCATION          AT_ENTRY_POINT
 270 #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP)
 271 #define CALL_DUMMY_ADDRESS()         entry_point_address ()
 272 extern CORE_ADDR d10v_push_return_address PARAMS ((CORE_ADDR pc, CORE_ADDR sp));
 273 #define PUSH_RETURN_ADDRESS(PC, SP)  d10v_push_return_address (PC, SP)
 274
 275 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP)
 276 /* #define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 ) */
 277
 278 #define PUSH_DUMMY_FRAME        generic_push_dummy_frame ()
 279
 280 /* override the default get_saved_register function with one that
 281    takes account of generic CALL_DUMMY frames */
 282 #define GET_SAVED_REGISTER
 283 #define get_saved_register generic_get_saved_register
 284
 285 #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
 286     sp = d10v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))
 287 extern CORE_ADDR d10v_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR));
 288
 289
 290 /* Extract from an array REGBUF containing the (raw) register state
 291    a function return value of type TYPE, and copy that, in virtual format,
 292    into VALBUF.  */
 293
 294 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 295 d10v_extract_return_value(TYPE, REGBUF, VALBUF)
 296   extern void
 297 d10v_extract_return_value PARAMS ((struct type *, char *, char *));
 298
 299
 300 #define REGISTER_SIZE 2
 301
 302 #ifdef CC_HAS_LONG_LONG
 303 #  define LONGEST long long
 304 #else
 305 #  define LONGEST long
 306 #endif
 307 #define ULONGEST unsigned LONGEST
 308
 309 void d10v_write_pc PARAMS ((CORE_ADDR val, int pid));
 310 CORE_ADDR d10v_read_pc PARAMS ((int pid));
 311 void d10v_write_sp PARAMS ((CORE_ADDR val));
 312 CORE_ADDR d10v_read_sp PARAMS ((void));
 313 void d10v_write_fp PARAMS ((CORE_ADDR val));
 314 CORE_ADDR d10v_read_fp PARAMS ((void));
 315
 316 #define TARGET_READ_PC(pid)             d10v_read_pc (pid)
 317 #define TARGET_WRITE_PC(val,pid)        d10v_write_pc (val, pid)
 318 #define TARGET_READ_FP()                d10v_read_fp ()
 319 #define TARGET_WRITE_FP(val)            d10v_write_fp (val)
 320 #define TARGET_READ_SP()                d10v_read_sp ()
 321 #define TARGET_WRITE_SP(val)            d10v_write_sp (val)
 322
 323 /* Number of bits in the appropriate type */
 324 #define TARGET_INT_BIT (2 * TARGET_CHAR_BIT)
 325 #define TARGET_PTR_BIT (4 * TARGET_CHAR_BIT)
 326 #define TARGET_DOUBLE_BIT (4 * TARGET_CHAR_BIT)
 327 #define TARGET_LONG_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
 328
 329 \f
 330 /* For the d10v when talking to the remote d10v board, GDB addresses
 331    need to be translated into a format that the d10v rom monitor
 332    understands. */
 333
 334 int remote_d10v_translate_xfer_address PARAMS ((CORE_ADDR gdb_addr, int gdb_len, CORE_ADDR *rem_addr));
 335 #define REMOTE_TRANSLATE_XFER_ADDRESS(GDB_ADDR, GDB_LEN, REM_ADDR, REM_LEN) \
 336 (REM_LEN) = remote_d10v_translate_xfer_address ((GDB_ADDR), (GDB_LEN), &(REM_ADDR))
 337