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      0x2000000
  37 #define IMEM_START      0x1000000
  38 #define STACK_START     0x2007ffe
  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) & 0x3000000 ? (x) : ((x) | DMEM_START))
 144 #define D10V_MAKE_IADDR(x) ( (x) & 0x3000000 ? (x) : (((x) << 2) | IMEM_START))
 145
 146 /* Store the address of the place in which to copy the structure the
 147    subroutine will return.  This is called from call_function.
 148
 149    We store structs through a pointer passed in R2 */
 150
 151 #define STORE_STRUCT_RETURN(ADDR, SP) \
 152     { write_register (2, (ADDR));  }
 153
 154
 155 /* Write into appropriate registers a function return value
 156    of type TYPE, given in virtual format.
 157
 158    Things always get returned in R2/R3 */
 159
 160 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 161   write_register_bytes (REGISTER_BYTE(2), VALBUF, TYPE_LENGTH (TYPE))
 162
 163
 164 /* Extract from an array REGBUF containing the (raw) register state
 165    the address in which a function should return its structure value,
 166    as a CORE_ADDR (or an expression that can be used as one).  */
 167
 168 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
 169 \f
 170
 171 /* Define other aspects of the stack frame.
 172    we keep a copy of the worked out return pc lying around, since it
 173    is a useful bit of info */
 174
 175 #define EXTRA_FRAME_INFO \
 176     CORE_ADDR return_pc; \
 177     CORE_ADDR dummy; \
 178     int frameless; \
 179     int size;
 180
 181 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
 182     d10v_init_extra_frame_info(fromleaf, fi)
 183
 184 extern void d10v_init_extra_frame_info PARAMS (( int fromleaf, struct frame_info *fi ));
 185
 186 /* A macro that tells us whether the function invocation represented
 187    by FI does not have a frame on the stack associated with it.  If it
 188    does not, FRAMELESS is set to 1, else 0.  */
 189
 190 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 191   (FRAMELESS) = frameless_look_for_prologue(FI)
 192
 193 #define FRAME_CHAIN(FRAME)       d10v_frame_chain(FRAME)
 194 #define FRAME_CHAIN_VALID(chain,frame)  \
 195       ((chain) != 0 && (frame) != 0 && (frame)->pc > IMEM_START)
 196 #define FRAME_SAVED_PC(FRAME)    ((FRAME)->return_pc)
 197 #define FRAME_ARGS_ADDRESS(fi)   (fi)->frame
 198 #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
 199
 200 /* Immediately after a function call, return the saved pc.  We can't */
 201 /* use frame->return_pc beause that is determined by reading R13 off the */
 202 /*stack and that may not be written yet. */
 203
 204 #define SAVED_PC_AFTER_CALL(frame) ((read_register(LR_REGNUM) << 2) | IMEM_START)
 205
 206 /* Set VAL to the number of args passed to frame described by FI.
 207    Can set VAL to -1, meaning no way to tell.  */
 208 /* We can't tell how many args there are */
 209
 210 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 211
 212 /* Return number of bytes at start of arglist that are not really args.  */
 213
 214 #define FRAME_ARGS_SKIP 0
 215
 216
 217 /* Put here the code to store, into a struct frame_saved_regs,
 218    the addresses of the saved registers of frame described by FRAME_INFO.
 219    This includes special registers such as pc and fp saved in special
 220    ways in the stack frame.  sp is even more special:
 221    the address we return for it IS the sp for the next frame.  */
 222
 223 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs)         \
 224    d10v_frame_find_saved_regs(frame_info, &(frame_saved_regs))
 225
 226 extern void d10v_frame_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *));
 227
 228 #define NAMES_HAVE_UNDERSCORE
 229
 230 /*
 231 DUMMY FRAMES.  Need these to support inferior function calls.  They work
 232 like this on D10V:  First we set a breakpoint at 0 or __start.  Then we push
 233 all the registers onto the stack.  Then put the function arguments in the proper
 234 registers and set r13 to our breakpoint address.  Finally call the function directly.
 235 When it hits the breakpoint, clear the break point and pop the old register contents
 236 off the stack.
 237 */
 238
 239 #define CALL_DUMMY              { }
 240 #define PUSH_DUMMY_FRAME
 241 #define CALL_DUMMY_START_OFFSET 0
 242 #define CALL_DUMMY_LOCATION     AT_ENTRY_POINT
 243 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
 244
 245 extern CORE_ADDR d10v_call_dummy_address PARAMS ((void));
 246 #define CALL_DUMMY_ADDRESS() d10v_call_dummy_address()
 247
 248 #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
 249 sp = d10v_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
 250
 251 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 )
 252
 253 extern CORE_ADDR d10v_fix_call_dummy PARAMS ((char *, CORE_ADDR, CORE_ADDR,
 254                                            int, struct value **,
 255                                            struct type *, int));
 256 #define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
 257     sp = d10v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))
 258 extern CORE_ADDR d10v_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR));
 259
 260
 261 /* Extract from an array REGBUF containing the (raw) register state
 262    a function return value of type TYPE, and copy that, in virtual format,
 263    into VALBUF.  */
 264
 265 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 266 d10v_extract_return_value(TYPE, REGBUF, VALBUF)
 267   extern void
 268 d10v_extract_return_value PARAMS ((struct type *, char *, char *));
 269
 270
 271 /* Discard from the stack the innermost frame,
 272    restoring all saved registers.  */
 273 #define POP_FRAME d10v_pop_frame();
 274 extern void d10v_pop_frame PARAMS((void));
 275
 276 #define REGISTER_SIZE 2
 277
 278 #ifdef CC_HAS_LONG_LONG
 279 #  define LONGEST long long
 280 #else
 281 #  define LONGEST long
 282 #endif
 283 #define ULONGEST unsigned LONGEST
 284
 285 void d10v_write_pc PARAMS ((CORE_ADDR val, int pid));
 286 CORE_ADDR d10v_read_pc PARAMS ((int pid));
 287 void d10v_write_sp PARAMS ((CORE_ADDR val));
 288 CORE_ADDR d10v_read_sp PARAMS ((void));
 289
 290 #define TARGET_READ_PC(pid)             d10v_read_pc (pid)
 291 #define TARGET_WRITE_PC(val,pid)        d10v_write_pc (val, pid)
 292 #define TARGET_READ_FP()                d10v_read_sp ()
 293 #define TARGET_WRITE_FP(val)            d10v_write_sp (val)
 294 #define TARGET_READ_SP()                d10v_read_sp ()
 295 #define TARGET_WRITE_SP(val)            d10v_write_sp (val)
 296
 297 /* Number of bits in the appropriate type */
 298 #define TARGET_INT_BIT (2 * TARGET_CHAR_BIT)
 299 #define TARGET_PTR_BIT (4 * TARGET_CHAR_BIT)
 300 #define TARGET_DOUBLE_BIT (4 * TARGET_CHAR_BIT)
 301 #define TARGET_LONG_DOUBLE_BIT (8 * TARGET_CHAR_BIT)