gdb/config/sparc/tm-sparc.h

   1 /* Target machine sub-parameters for SPARC, for GDB, the GNU debugger.
   2    This is included by other tm-*.h files to define SPARC cpu-related info.
   3    Copyright 1986, 1987, 1989, 1991, 1992, 1993 Free Software Foundation, Inc.
   4    Contributed by Michael Tiemann (tiemann@mcc.com)
   5
   6 This file is part of GDB.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #define TARGET_BYTE_ORDER BIG_ENDIAN
  23
  24 /* Floating point is IEEE compatible.  */
  25 #define IEEE_FLOAT
  26
  27 /* When passing a structure to a function, Sun cc passes the address
  28    not the structure itself.  It (under SunOS4) creates two symbols,
  29    which we need to combine to a LOC_REGPARM.  Gcc version two (as of
  30    1.92) behaves like sun cc.  REG_STRUCT_HAS_ADDR is smart enough to
  31    distinguish between Sun cc, gcc version 1 and gcc version 2.
  32
  33    This still doesn't work if the argument is not one passed in a
  34    register (i.e. it's the 7th or later argument).  */
  35 #define REG_STRUCT_HAS_ADDR(gcc_p) (gcc_p != 1)
  36
  37 /* Sun /bin/cc gets this right as of SunOS 4.1.x.  We need to define
  38    BELIEVE_PCC_PROMOTION to get this right now that the code which
  39    detects gcc2_compiled. is broken.  This loses for SunOS 4.0.x and
  40    earlier.  */
  41
  42 #define BELIEVE_PCC_PROMOTION 1
  43
  44 /* For acc, there's no need to correct LBRAC entries by guessing how
  45    they should work.  In fact, this is harmful because the LBRAC
  46    entries now all appear at the end of the function, not intermixed
  47    with the SLINE entries.  n_opt_found detects acc for Solaris binaries;
  48    function_stab_type detects acc for SunOS4 binaries.
  49
  50    For binary from SunOS4 /bin/cc, need to correct LBRAC's.
  51
  52    For gcc, like acc, don't correct.  */
  53
  54 #define SUN_FIXED_LBRAC_BUG \
  55   (n_opt_found \
  56    || function_stab_type == N_STSYM \
  57    || function_stab_type == N_GSYM \
  58    || processing_gcc_compilation)
  59
  60 /* Do variables in the debug stabs occur after the N_LBRAC or before it?
  61    acc: after, gcc: before, SunOS4 /bin/cc: before.  */
  62
  63 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) \
  64   (!(gcc_p) \
  65    && (n_opt_found \
  66        || function_stab_type == N_STSYM \
  67        || function_stab_type == N_GSYM))
  68
  69 /* Offset from address of function to start of its code.
  70    Zero on most machines.  */
  71
  72 #define FUNCTION_START_OFFSET 0
  73
  74 /* Advance PC across any function entry prologue instructions
  75    to reach some "real" code.  SKIP_PROLOGUE_FRAMELESS_P advances
  76    the PC past some of the prologue, but stops as soon as it
  77    knows that the function has a frame.  Its result is equal
  78    to its input PC if the function is frameless, unequal otherwise.  */
  79
  80 #define SKIP_PROLOGUE(pc) \
  81   { pc = skip_prologue (pc, 0); }
  82 #define SKIP_PROLOGUE_FRAMELESS_P(pc) \
  83   { pc = skip_prologue (pc, 1); }
  84 extern CORE_ADDR skip_prologue ();
  85
  86 /* Immediately after a function call, return the saved pc.
  87    Can't go through the frames for this because on some machines
  88    the new frame is not set up until the new function executes
  89    some instructions.  */
  90
  91 /* On the Sun 4 under SunOS, the compile will leave a fake insn which
  92    encodes the structure size being returned.  If we detect such
  93    a fake insn, step past it.  */
  94
  95 #define PC_ADJUST(pc) sparc_pc_adjust(pc)
  96 extern CORE_ADDR sparc_pc_adjust();
  97
  98 #define SAVED_PC_AFTER_CALL(frame) PC_ADJUST (read_register (RP_REGNUM))
  99
 100 /* Stack grows downward.  */
 101
 102 #define INNER_THAN <
 103
 104 /* Stack has strict alignment.  */
 105
 106 #define STACK_ALIGN(ADDR) (((ADDR)+7)&-8)
 107
 108 /* Sequence of bytes for breakpoint instruction.  */
 109
 110 #define BREAKPOINT {0x91, 0xd0, 0x20, 0x01}
 111
 112 /* Amount PC must be decremented by after a breakpoint.
 113    This is often the number of bytes in BREAKPOINT
 114    but not always.  */
 115
 116 #define DECR_PC_AFTER_BREAK 0
 117
 118 /* Nonzero if instruction at PC is a return instruction.  */
 119 /* For SPARC, this is either a "jmpl %o7+8,%g0" or "jmpl %i7+8,%g0".
 120
 121    Note: this does not work for functions returning structures under SunOS.  */
 122 #define ABOUT_TO_RETURN(pc) \
 123   ((read_memory_integer (pc, 4)|0x00040000) == 0x81c7e008)
 124
 125 /* Return 1 if P points to an invalid floating point value.  */
 126
 127 #define INVALID_FLOAT(p, len) 0   /* Just a first guess; not checked */
 128
 129 /* Say how long (ordinary) registers are.  */
 130
 131 #define REGISTER_TYPE long
 132
 133 /* Number of machine registers */
 134
 135 #define NUM_REGS 72
 136
 137 /* Initializer for an array of names of registers.
 138    There should be NUM_REGS strings in this initializer.  */
 139
 140 #define REGISTER_NAMES  \
 141 { "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",       \
 142   "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",       \
 143   "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",       \
 144   "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7",       \
 145                                                                 \
 146   "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",       \
 147   "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
 148   "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",       \
 149   "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",       \
 150                                                                 \
 151   "y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr" }
 152
 153 /* Register numbers of various important registers.
 154    Note that some of these values are "real" register numbers,
 155    and correspond to the general registers of the machine,
 156    and some are "phony" register numbers which are too large
 157    to be actual register numbers as far as the user is concerned
 158    but do serve to get the desired values when passed to read_register.  */
 159
 160 #define G0_REGNUM 0             /* %g0 */
 161 #define G1_REGNUM 1             /* %g1 */
 162 #define O0_REGNUM 8             /* %o0 */
 163 #define SP_REGNUM 14            /* Contains address of top of stack, \
 164                                    which is also the bottom of the frame.  */
 165 #define RP_REGNUM 15            /* Contains return address value, *before* \
 166                                    any windows get switched.  */
 167 #define O7_REGNUM 15            /* Last local reg not saved on stack frame */
 168 #define L0_REGNUM 16            /* First local reg that's saved on stack frame
 169                                    rather than in machine registers */
 170 #define I0_REGNUM 24            /* %i0 */
 171 #define FP_REGNUM 30            /* Contains address of executing stack frame */
 172 #define I7_REGNUM 31            /* Last local reg saved on stack frame */
 173 #define FP0_REGNUM 32           /* Floating point register 0 */
 174 #define Y_REGNUM 64             /* Temp register for multiplication, etc.  */
 175 #define PS_REGNUM 65            /* Contains processor status */
 176 #define WIM_REGNUM 66           /* Window Invalid Mask (not really supported) */
 177 #define TBR_REGNUM 67           /* Trap Base Register (not really supported) */
 178 #define PC_REGNUM 68            /* Contains program counter */
 179 #define NPC_REGNUM 69           /* Contains next PC */
 180 #define FPS_REGNUM 70           /* Floating point status register */
 181 #define CPS_REGNUM 71           /* Coprocessor status register */
 182
 183 /* Total amount of space needed to store our copies of the machine's
 184    register state, the array `registers'.  On the sparc, `registers'
 185    contains the ins and locals, even though they are saved on the
 186    stack rather than with the other registers, and this causes hair
 187    and confusion in places like pop_frame.  It probably would be
 188    better to remove the ins and locals from `registers', make sure
 189    that get_saved_register can get them from the stack (even in the
 190    innermost frame), and make this the way to access them.  For the
 191    frame pointer we would do that via TARGET_READ_FP.  */
 192
 193 #define REGISTER_BYTES (32*4+32*4+8*4)
 194
 195 /* Index within `registers' of the first byte of the space for
 196    register N.  */
 197 /* ?? */
 198 #define REGISTER_BYTE(N)  ((N)*4)
 199
 200 /* The SPARC processor has register windows.  */
 201
 202 #define HAVE_REGISTER_WINDOWS
 203
 204 /* Is this register part of the register window system?  A yes answer
 205    implies that 1) The name of this register will not be the same in
 206    other frames, and 2) This register is automatically "saved" (out
 207    registers shifting into ins counts) upon subroutine calls and thus
 208    there is no need to search more than one stack frame for it. */
 209
 210 #define REGISTER_IN_WINDOW_P(regnum)    \
 211   ((regnum) >= 8 && (regnum) < 32)
 212
 213 /* Number of bytes of storage in the actual machine representation
 214    for register N.  */
 215
 216 /* On the SPARC, all regs are 4 bytes.  */
 217
 218 #define REGISTER_RAW_SIZE(N) (4)
 219
 220 /* Number of bytes of storage in the program's representation
 221    for register N.  */
 222
 223 /* On the SPARC, all regs are 4 bytes.  */
 224
 225 #define REGISTER_VIRTUAL_SIZE(N) (4)
 226
 227 /* Largest value REGISTER_RAW_SIZE can have.  */
 228
 229 #define MAX_REGISTER_RAW_SIZE 8
 230
 231 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 232
 233 #define MAX_REGISTER_VIRTUAL_SIZE 8
 234
 235 /* Return the GDB type object for the "standard" data type
 236    of data in register N.  */
 237
 238 #define REGISTER_VIRTUAL_TYPE(N) \
 239  ((N) < 32 ? builtin_type_int : (N) < 64 ? builtin_type_float : \
 240   builtin_type_int)
 241
 242 /* Writing to %g0 is a noop (not an error or exception or anything like
 243    that, however).  */
 244
 245 #define CANNOT_STORE_REGISTER(regno) ((regno) == G0_REGNUM)
 246
 247 /* Store the address of the place in which to copy the structure the
 248    subroutine will return.  This is called from call_function. */
 249
 250 #define STORE_STRUCT_RETURN(ADDR, SP) \
 251   { target_write_memory ((SP)+(16*4), (char *)&(ADDR), 4); }
 252
 253 /* Extract from an array REGBUF containing the (raw) register state
 254    a function return value of type TYPE, and copy that, in virtual format,
 255    into VALBUF.  */
 256
 257 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF)              \
 258   {                                                                        \
 259     if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)                                 \
 260       {                                                                    \
 261         memcpy ((VALBUF), ((int *)(REGBUF))+FP0_REGNUM, TYPE_LENGTH(TYPE));\
 262       }                                                                    \
 263     else                                                                   \
 264       memcpy ((VALBUF),                                                    \
 265               (char *)(REGBUF) + 4 * 8 +                                   \
 266               (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)),        \
 267               TYPE_LENGTH(TYPE));                                          \
 268   }
 269
 270 /* Write into appropriate registers a function return value
 271    of type TYPE, given in virtual format.  */
 272 /* On sparc, values are returned in register %o0.  */
 273 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 274   {                                                                          \
 275     if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)                                   \
 276       /* Floating-point values are returned in the register pair */          \
 277       /* formed by %f0 and %f1 (doubles are, anyway).  */                    \
 278       write_register_bytes (REGISTER_BYTE (FP0_REGNUM), (VALBUF),            \
 279                             TYPE_LENGTH (TYPE));                             \
 280     else                                                                     \
 281       /* Other values are returned in register %o0.  */                      \
 282       write_register_bytes (REGISTER_BYTE (O0_REGNUM), (VALBUF),             \
 283                             TYPE_LENGTH (TYPE));  \
 284   }
 285
 286 /* Extract from an array REGBUF containing the (raw) register state
 287    the address in which a function should return its structure value,
 288    as a CORE_ADDR (or an expression that can be used as one).  */
 289
 290 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
 291   (sparc_extract_struct_value_address (REGBUF))
 292
 293 extern CORE_ADDR
 294 sparc_extract_struct_value_address PARAMS ((char [REGISTER_BYTES]));
 295
 296 \f
 297 /* Describe the pointer in each stack frame to the previous stack frame
 298    (its caller).  */
 299
 300 /* FRAME_CHAIN takes a frame's nominal address
 301    and produces the frame's chain-pointer. */
 302
 303 /* In the case of the Sun 4, the frame-chain's nominal address
 304    is held in the frame pointer register.
 305
 306    On the Sun4, the frame (in %fp) is %sp for the previous frame.
 307    From the previous frame's %sp, we can find the previous frame's
 308    %fp: it is in the save area just above the previous frame's %sp.
 309
 310    If we are setting up an arbitrary frame, we'll need to know where
 311    it ends.  Hence the following.  This part of the frame cache
 312    structure should be checked before it is assumed that this frame's
 313    bottom is in the stack pointer.
 314
 315    If there isn't a frame below this one, the bottom of this frame is
 316    in the stack pointer.
 317
 318    If there is a frame below this one, and the frame pointers are
 319    identical, it's a leaf frame and the bottoms are the same also.
 320
 321    Otherwise the bottom of this frame is the top of the next frame.
 322
 323    The bottom field is misnamed, since it might imply that memory from
 324    bottom to frame contains this frame.  That need not be true if
 325    stack frames are allocated in different segments (e.g. some on a
 326    stack, some on a heap in the data segment).  */
 327
 328 #define EXTRA_FRAME_INFO        FRAME_ADDR bottom;
 329 #define INIT_EXTRA_FRAME_INFO(fromleaf, fci)  \
 330   (fci)->bottom =                                       \
 331    ((fci)->next ?                                       \
 332     ((fci)->frame == (fci)->next->frame ?               \
 333      (fci)->next->bottom : (fci)->next->frame) :        \
 334     read_register (SP_REGNUM));
 335
 336 #define FRAME_CHAIN(thisframe) (sparc_frame_chain (thisframe))
 337 CORE_ADDR sparc_frame_chain ();
 338
 339 /* Define other aspects of the stack frame.  */
 340
 341 /* A macro that tells us whether the function invocation represented
 342    by FI does not have a frame on the stack associated with it.  If it
 343    does not, FRAMELESS is set to 1, else 0.  */
 344 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 345   (FRAMELESS) = frameless_look_for_prologue(FI)
 346
 347 /* Where is the PC for a specific frame */
 348
 349 #define FRAME_SAVED_PC(FRAME) frame_saved_pc (FRAME)
 350 CORE_ADDR frame_saved_pc ();
 351
 352 /* If the argument is on the stack, it will be here.  */
 353 #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
 354
 355 #define FRAME_STRUCT_ARGS_ADDRESS(fi) ((fi)->frame)
 356
 357 #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
 358
 359 /* Set VAL to the number of args passed to frame described by FI.
 360    Can set VAL to -1, meaning no way to tell.  */
 361
 362 /* We can't tell how many args there are
 363    now that the C compiler delays popping them.  */
 364 #define FRAME_NUM_ARGS(val,fi) (val = -1)
 365
 366 /* Return number of bytes at start of arglist that are not really args.  */
 367
 368 #define FRAME_ARGS_SKIP 68
 369
 370 /* Put here the code to store, into a struct frame_saved_regs,
 371    the addresses of the saved registers of frame described by FRAME_INFO.
 372    The actual code is in sparc-tdep.c so we can debug it sanely.  */
 373
 374 #define FRAME_FIND_SAVED_REGS(fi, frame_saved_regs)         \
 375         sparc_frame_find_saved_regs ((fi), &(frame_saved_regs))
 376 extern void sparc_frame_find_saved_regs ();
 377 \f
 378 /* Things needed for making the inferior call functions.  */
 379 /*
 380  * First of all, let me give my opinion of what the DUMMY_FRAME
 381  * actually looks like.
 382  *
 383  *               |                                 |
 384  *               |                                 |
 385  *               + - - - - - - - - - - - - - - - - +<-- fp (level 0)
 386  *               |                                 |
 387  *               |                                 |
 388  *               |                                 |
 389  *               |                                 |
 390  *               |  Frame of innermost program     |
 391  *               |           function              |
 392  *               |                                 |
 393  *               |                                 |
 394  *               |                                 |
 395  *               |                                 |
 396  *               |                                 |
 397  *               |---------------------------------|<-- sp (level 0), fp (c)
 398  *               |                                 |
 399  *     DUMMY     |             fp0-31              |
 400  *               |                                 |
 401  *               |             ------              |<-- fp - 0x80
 402  *     FRAME     |              g0-7               |<-- fp - 0xa0
 403  *               |              i0-7               |<-- fp - 0xc0
 404  *               |             other               |<-- fp - 0xe0
 405  *               |               ?                 |
 406  *               |               ?                 |
 407  *               |---------------------------------|<-- sp' = fp - 0x140
 408  *               |                                 |
 409  * xcution start |                                 |
 410  * sp' + 0x94 -->|        CALL_DUMMY (x code)      |
 411  *               |                                 |
 412  *               |                                 |
 413  *               |---------------------------------|<-- sp'' = fp - 0x200
 414  *               |  align sp to 8 byte boundary    |
 415  *               |     ==> args to fn <==          |
 416  *  Room for     |                                 |
 417  * i & l's + agg | CALL_DUMMY_STACK_ADJUST = 0x0x44|
 418  *               |---------------------------------|<-- final sp (variable)
 419  *               |                                 |
 420  *               |   Where function called will    |
 421  *               |           build frame.          |
 422  *               |                                 |
 423  *               |                                 |
 424  *
 425  *   I understand everything in this picture except what the space
 426  * between fp - 0xe0 and fp - 0x140 is used for.  Oh, and I don't
 427  * understand why there's a large chunk of CALL_DUMMY that never gets
 428  * executed (its function is superceeded by PUSH_DUMMY_FRAME; they
 429  * are designed to do the same thing).
 430  *
 431  *   PUSH_DUMMY_FRAME saves the registers above sp' and pushes the
 432  * register file stack down one.
 433  *
 434  *   call_function then writes CALL_DUMMY, pushes the args onto the
 435  * stack, and adjusts the stack pointer.
 436  *
 437  *   run_stack_dummy then starts execution (in the middle of
 438  * CALL_DUMMY, as directed by call_function).
 439  */
 440
 441 /* Push an empty stack frame, to record the current PC, etc.  */
 442
 443 #define PUSH_DUMMY_FRAME        sparc_push_dummy_frame ()
 444 #define POP_FRAME       sparc_pop_frame ()
 445
 446 void sparc_push_dummy_frame (), sparc_pop_frame ();
 447 /* This sequence of words is the instructions
 448
 449    save %sp,-0x140,%sp
 450    std  %f30,[%fp-0x08]
 451    std  %f28,[%fp-0x10]
 452    std  %f26,[%fp-0x18]
 453    std  %f24,[%fp-0x20]
 454    std  %f22,[%fp-0x28]
 455    std  %f20,[%fp-0x30]
 456    std  %f18,[%fp-0x38]
 457    std  %f16,[%fp-0x40]
 458    std  %f14,[%fp-0x48]
 459    std  %f12,[%fp-0x50]
 460    std  %f10,[%fp-0x58]
 461    std  %f8,[%fp-0x60]
 462    std  %f6,[%fp-0x68]
 463    std  %f4,[%fp-0x70]
 464    std  %f2,[%fp-0x78]
 465    std  %f0,[%fp-0x80]
 466    std  %g6,[%fp-0x88]
 467    std  %g4,[%fp-0x90]
 468    std  %g2,[%fp-0x98]
 469    std  %g0,[%fp-0xa0]
 470    std  %i6,[%fp-0xa8]
 471    std  %i4,[%fp-0xb0]
 472    std  %i2,[%fp-0xb8]
 473    std  %i0,[%fp-0xc0]
 474    nop ! stcsr  [%fp-0xc4]
 475    nop ! stfsr  [%fp-0xc8]
 476    nop ! wr     %npc,[%fp-0xcc]
 477    nop ! wr     %pc,[%fp-0xd0]
 478    rd   %tbr,%o0
 479    st   %o0,[%fp-0xd4]
 480    rd   %wim,%o1
 481    st   %o0,[%fp-0xd8]
 482    rd   %psr,%o0
 483    st   %o0,[%fp-0xdc]
 484    rd   %y,%o0
 485    st   %o0,[%fp-0xe0]
 486
 487      /..* The arguments are pushed at this point by GDB;
 488         no code is needed in the dummy for this.
 489         The CALL_DUMMY_START_OFFSET gives the position of
 490         the following ld instruction.  *../
 491
 492    ld   [%sp+0x58],%o5
 493    ld   [%sp+0x54],%o4
 494    ld   [%sp+0x50],%o3
 495    ld   [%sp+0x4c],%o2
 496    ld   [%sp+0x48],%o1
 497    call 0x00000000
 498    ld   [%sp+0x44],%o0
 499    nop
 500    ta 1
 501    nop
 502
 503    note that this is 192 bytes, which is a multiple of 8 (not only 4) bytes.
 504    note that the `call' insn is a relative, not an absolute call.
 505    note that the `nop' at the end is needed to keep the trap from
 506         clobbering things (if NPC pointed to garbage instead).
 507
 508 We actually start executing at the `sethi', since the pushing of the
 509 registers (as arguments) is done by PUSH_DUMMY_FRAME.  If this were
 510 real code, the arguments for the function called by the CALL would be
 511 pushed between the list of ST insns and the CALL, and we could allow
 512 it to execute through.  But the arguments have to be pushed by GDB
 513 after the PUSH_DUMMY_FRAME is done, and we cannot allow these ST
 514 insns to be performed again, lest the registers saved be taken for
 515 arguments.  */
 516
 517 #define CALL_DUMMY { 0x9de3bee0, 0xfd3fbff8, 0xf93fbff0, 0xf53fbfe8,    \
 518                      0xf13fbfe0, 0xed3fbfd8, 0xe93fbfd0, 0xe53fbfc8,    \
 519                      0xe13fbfc0, 0xdd3fbfb8, 0xd93fbfb0, 0xd53fbfa8,    \
 520                      0xd13fbfa0, 0xcd3fbf98, 0xc93fbf90, 0xc53fbf88,    \
 521                      0xc13fbf80, 0xcc3fbf78, 0xc83fbf70, 0xc43fbf68,    \
 522                      0xc03fbf60, 0xfc3fbf58, 0xf83fbf50, 0xf43fbf48,    \
 523                      0xf03fbf40, 0x01000000, 0x01000000, 0x01000000,    \
 524                      0x01000000, 0x91580000, 0xd027bf50, 0x93500000,    \
 525                      0xd027bf4c, 0x91480000, 0xd027bf48, 0x91400000,    \
 526                      0xd027bf44, 0xda03a058, 0xd803a054, 0xd603a050,    \
 527                      0xd403a04c, 0xd203a048, 0x40000000, 0xd003a044,    \
 528                      0x01000000, 0x91d02001, 0x01000000, 0x01000000}
 529
 530 #define CALL_DUMMY_LENGTH 192
 531
 532 #define CALL_DUMMY_START_OFFSET 148
 533
 534 #define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + (8 * 4))
 535
 536 #define CALL_DUMMY_STACK_ADJUST 68
 537
 538 /* Insert the specified number of args and function address
 539    into a call sequence of the above form stored at DUMMYNAME.
 540
 541    For structs and unions, if the function was compiled with Sun cc,
 542    it expects 'unimp' after the call.  But gcc doesn't use that
 543    (twisted) convention.  So leave a nop there for gcc (FIX_CALL_DUMMY
 544    can assume it is operating on a pristine CALL_DUMMY, not one that
 545    has already been customized for a different function).  */
 546
 547 #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p)     \
 548 {                                                                       \
 549   *(int *)((char *) dummyname+168) = (0x40000000|((fun-(pc+168))>>2));  \
 550   if (!gcc_p                                                            \
 551       && (TYPE_CODE (type) == TYPE_CODE_STRUCT                          \
 552           || TYPE_CODE (type) == TYPE_CODE_UNION))                      \
 553     *(int *)((char *) dummyname+176) = (TYPE_LENGTH (type) & 0x1fff);   \
 554 }
 555
 556 \f
 557 /* Sparc has no reliable single step ptrace call */
 558
 559 #define NO_SINGLE_STEP 1
 560 extern void single_step ();
 561
 562 /* We need more arguments in a frame specification for the
 563    "frame" or "info frame" command.  */
 564
 565 #define SETUP_ARBITRARY_FRAME(argc, argv) setup_arbitrary_frame (argc, argv)
 566 /* FIXME:  Depends on equivalence between FRAME and "struct frame_info *",
 567    and equivalence between CORE_ADDR and FRAME_ADDR. */
 568 extern struct frame_info *setup_arbitrary_frame PARAMS ((int, CORE_ADDR *));
 569
 570 /* To print every pair of float registers as a double, we use this hook.  */
 571
 572 #define PRINT_REGISTER_HOOK(regno)      \
 573   if (((regno) >= FP0_REGNUM)           \
 574    && ((regno) <  FP0_REGNUM + 32)      \
 575    && (0 == ((regno) & 1))) {           \
 576     char doublereg[8];          /* two float regs */    \
 577     if (!read_relative_register_raw_bytes ((regno)  , doublereg  )      \
 578      && !read_relative_register_raw_bytes ((regno)+1, doublereg+4)) {   \
 579       printf("\t");                     \
 580       print_floating (doublereg, builtin_type_double, stdout);  \
 581     }                                   \
 582   }
 583
 584 /* Optimization for storing registers to the inferior.  The hook
 585    DO_DEFERRED_STORES
 586    actually executes any deferred stores.  It is called any time
 587    we are going to proceed the child, or read its registers.
 588    The hook CLEAR_DEFERRED_STORES is called when we want to throw
 589    away the inferior process, e.g. when it dies or we kill it.
 590    FIXME, this does not handle remote debugging cleanly.  */
 591
 592 extern int deferred_stores;
 593 #define DO_DEFERRED_STORES      \
 594   if (deferred_stores)          \
 595     target_store_registers (-2);
 596 #define CLEAR_DEFERRED_STORES   \
 597   deferred_stores = 0;