gdb/ns32k-tdep.c

   1 /* Target dependent code for the NS32000, for GDB.
   2    Copyright 1986, 1988, 1991, 1992, 1994, 1995, 1998, 1999, 2000, 2001,
   3    2002 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "frame.h"
  24 #include "gdbtypes.h"
  25 #include "gdbcore.h"
  26 #include "inferior.h"
  27 #include "regcache.h"
  28 #include "target.h"
  29
  30 #include "arch-utils.h"
  31
  32 #include "ns32k-tdep.h"
  33 #include "gdb_string.h"
  34
  35 static int sign_extend (int value, int bits);
  36 static CORE_ADDR ns32k_get_enter_addr (CORE_ADDR);
  37 static int ns32k_localcount (CORE_ADDR enter_pc);
  38 static void flip_bytes (void *, int);
  39
  40 static const char *
  41 ns32k_register_name_32082 (int regno)
  42 {
  43   static char *register_names[] =
  44   {
  45     "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
  46     "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
  47     "sp", "fp", "pc", "ps",
  48     "l0", "l1", "l2", "l3", "xx",
  49   };
  50
  51   if (regno < 0)
  52     return NULL;
  53   if (regno >= sizeof (register_names) / sizeof (*register_names))
  54     return NULL;
  55
  56   return (register_names[regno]);
  57 }
  58
  59 static const char *
  60 ns32k_register_name_32382 (int regno)
  61 {
  62   static char *register_names[] =
  63   {
  64     "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
  65     "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
  66     "sp", "fp", "pc", "ps",
  67     "fsr",
  68     "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", "xx",
  69   };
  70
  71   if (regno < 0)
  72     return NULL;
  73   if (regno >= sizeof (register_names) / sizeof (*register_names))
  74     return NULL;
  75
  76   return (register_names[regno]);
  77 }
  78
  79 static int
  80 ns32k_register_byte_32082 (int regno)
  81 {
  82   if (regno >= NS32K_LP0_REGNUM)
  83     return (NS32K_LP0_REGNUM * 4) + ((regno - NS32K_LP0_REGNUM) * 8);
  84
  85   return (regno * 4);
  86 }
  87
  88 static int
  89 ns32k_register_byte_32382 (int regno)
  90 {
  91   /* This is a bit yuk.  The even numbered double precision floating
  92      point long registers occupy the same space as the even:odd numbered
  93      single precision floating point registers, but the extra 32381 FPU
  94      registers are at the end.  Doing it this way is compatible for both
  95      32081 and 32381 equipped machines.  */
  96
  97   return ((regno < NS32K_LP0_REGNUM ? regno
  98            : (regno - NS32K_LP0_REGNUM) & 1 ? regno - 1
  99            : (regno - NS32K_LP0_REGNUM + FP0_REGNUM)) * 4);
 100 }
 101
 102 static int
 103 ns32k_register_raw_size (int regno)
 104 {
 105   /* All registers are 4 bytes, except for the doubled floating
 106      registers.  */
 107
 108   return ((regno >= NS32K_LP0_REGNUM) ? 8 : 4);
 109 }
 110
 111 static int
 112 ns32k_register_virtual_size (int regno)
 113 {
 114   return ((regno >= NS32K_LP0_REGNUM) ? 8 : 4);
 115 }
 116
 117 static struct type *
 118 ns32k_register_virtual_type (int regno)
 119 {
 120   if (regno < FP0_REGNUM)
 121     return (builtin_type_int);
 122
 123   if (regno < FP0_REGNUM + 8)
 124     return (builtin_type_float);
 125
 126   if (regno < NS32K_LP0_REGNUM)
 127     return (builtin_type_int);
 128
 129   return (builtin_type_double);
 130 }
 131
 132 /* Immediately after a function call, return the saved PC.  Can't
 133    always go through the frames for this because on some systems,
 134    the new frame is not set up until the new function executes some
 135    instructions.  */
 136
 137 static CORE_ADDR
 138 ns32k_saved_pc_after_call (struct frame_info *frame)
 139 {
 140   return (read_memory_integer (read_register (SP_REGNUM), 4));
 141 }
 142
 143 /* Advance PC across any function entry prologue instructions
 144    to reach some "real" code.  */
 145
 146 static CORE_ADDR
 147 umax_skip_prologue (CORE_ADDR pc)
 148 {
 149   register unsigned char op = read_memory_integer (pc, 1);
 150   if (op == 0x82)
 151     {
 152       op = read_memory_integer (pc + 2, 1);
 153       if ((op & 0x80) == 0)
 154         pc += 3;
 155       else if ((op & 0xc0) == 0x80)
 156         pc += 4;
 157       else
 158         pc += 6;
 159     }
 160   return pc;
 161 }
 162 \f
 163 static const unsigned char *
 164 ns32k_breakpoint_from_pc (CORE_ADDR *pcp, int *lenp)
 165 {
 166   static const unsigned char breakpoint_insn[] = { 0xf2 };
 167
 168   *lenp = sizeof (breakpoint_insn);
 169   return breakpoint_insn;
 170 }
 171
 172 /* Return number of args passed to a frame.
 173    Can return -1, meaning no way to tell.
 174    Encore's C compiler often reuses same area on stack for args,
 175    so this will often not work properly.  If the arg names
 176    are known, it's likely most of them will be printed. */
 177
 178 static int
 179 umax_frame_num_args (struct frame_info *fi)
 180 {
 181   int numargs;
 182   CORE_ADDR pc;
 183   CORE_ADDR enter_addr;
 184   unsigned int insn;
 185   unsigned int addr_mode;
 186   int width;
 187
 188   numargs = -1;
 189   enter_addr = ns32k_get_enter_addr ((fi)->pc);
 190   if (enter_addr > 0)
 191     {
 192       pc = ((enter_addr == 1)
 193             ? SAVED_PC_AFTER_CALL (fi)
 194             : FRAME_SAVED_PC (fi));
 195       insn = read_memory_integer (pc, 2);
 196       addr_mode = (insn >> 11) & 0x1f;
 197       insn = insn & 0x7ff;
 198       if ((insn & 0x7fc) == 0x57c
 199           && addr_mode == 0x14) /* immediate */
 200         {
 201           if (insn == 0x57c)    /* adjspb */
 202             width = 1;
 203           else if (insn == 0x57d)       /* adjspw */
 204             width = 2;
 205           else if (insn == 0x57f)       /* adjspd */
 206             width = 4;
 207           else
 208             internal_error (__FILE__, __LINE__, "bad else");
 209           numargs = read_memory_integer (pc + 2, width);
 210           if (width > 1)
 211             flip_bytes (&numargs, width);
 212           numargs = -sign_extend (numargs, width * 8) / 4;
 213         }
 214     }
 215   return numargs;
 216 }
 217
 218 static int
 219 sign_extend (int value, int bits)
 220 {
 221   value = value & ((1 << bits) - 1);
 222   return (value & (1 << (bits - 1))
 223           ? value | (~((1 << bits) - 1))
 224           : value);
 225 }
 226
 227 static void
 228 flip_bytes (void *p, int count)
 229 {
 230   char tmp;
 231   char *ptr = 0;
 232
 233   while (count > 0)
 234     {
 235       tmp = *ptr;
 236       ptr[0] = ptr[count - 1];
 237       ptr[count - 1] = tmp;
 238       ptr++;
 239       count -= 2;
 240     }
 241 }
 242
 243 /* Return the number of locals in the current frame given a
 244    pc pointing to the enter instruction.  This is used by
 245    ns32k_frame_init_saved_regs.  */
 246
 247 static int
 248 ns32k_localcount (CORE_ADDR enter_pc)
 249 {
 250   unsigned char localtype;
 251   int localcount;
 252
 253   localtype = read_memory_integer (enter_pc + 2, 1);
 254   if ((localtype & 0x80) == 0)
 255     localcount = localtype;
 256   else if ((localtype & 0xc0) == 0x80)
 257     localcount = (((localtype & 0x3f) << 8)
 258                   | (read_memory_integer (enter_pc + 3, 1) & 0xff));
 259   else
 260     localcount = (((localtype & 0x3f) << 24)
 261                   | ((read_memory_integer (enter_pc + 3, 1) & 0xff) << 16)
 262                   | ((read_memory_integer (enter_pc + 4, 1) & 0xff) << 8)
 263                   | (read_memory_integer (enter_pc + 5, 1) & 0xff));
 264   return localcount;
 265 }
 266
 267
 268 /* Nonzero if instruction at PC is a return instruction.  */
 269
 270 static int
 271 ns32k_about_to_return (CORE_ADDR pc)
 272 {
 273   return (read_memory_integer (pc, 1) == 0x12);
 274 }
 275
 276 /* Get the address of the enter opcode for this function, if it is active.
 277    Returns positive address > 1 if pc is between enter/exit,
 278    1 if pc before enter or after exit, 0 otherwise. */
 279 static CORE_ADDR
 280 ns32k_get_enter_addr (CORE_ADDR pc)
 281 {
 282   CORE_ADDR enter_addr;
 283   unsigned char op;
 284
 285   if (pc == 0)
 286     return 0;
 287
 288   if (ns32k_about_to_return (pc))
 289     return 1;                   /* after exit */
 290
 291   enter_addr = get_pc_function_start (pc);
 292
 293   if (pc == enter_addr)
 294     return 1;                   /* before enter */
 295
 296   op = read_memory_integer (enter_addr, 1);
 297
 298   if (op != 0x82)
 299     return 0;                   /* function has no enter/exit */
 300
 301   return enter_addr;            /* pc is between enter and exit */
 302 }
 303
 304 static CORE_ADDR
 305 ns32k_frame_chain (struct frame_info *frame)
 306 {
 307   /* In the case of the NS32000 series, the frame's nominal address is the
 308      FP value, and that address is saved at the previous FP value as a
 309      4-byte word.  */
 310
 311   if (inside_entry_file (frame->pc))
 312     return 0;
 313
 314   return (read_memory_integer (frame->frame, 4));
 315 }
 316
 317
 318 static CORE_ADDR
 319 ns32k_sigtramp_saved_pc (struct frame_info *frame)
 320 {
 321   CORE_ADDR sigcontext_addr;
 322   char *buf;
 323   int ptrbytes = TYPE_LENGTH (builtin_type_void_func_ptr);
 324   int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
 325
 326   buf = alloca (ptrbytes);
 327   /* Get sigcontext address, it is the third parameter on the stack.  */
 328   if (frame->next)
 329     sigcontext_addr = read_memory_typed_address
 330       (FRAME_ARGS_ADDRESS (frame->next) + FRAME_ARGS_SKIP + sigcontext_offs,
 331        builtin_type_void_data_ptr);
 332   else
 333     sigcontext_addr = read_memory_typed_address
 334       (read_register (SP_REGNUM) + sigcontext_offs, builtin_type_void_data_ptr);
 335
 336   /* Don't cause a memory_error when accessing sigcontext in case the stack
 337      layout has changed or the stack is corrupt.  */
 338   target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
 339   return extract_typed_address (buf, builtin_type_void_func_ptr);
 340 }
 341
 342 static CORE_ADDR
 343 ns32k_frame_saved_pc (struct frame_info *frame)
 344 {
 345   if ((get_frame_type (frame) == SIGTRAMP_FRAME))
 346     return (ns32k_sigtramp_saved_pc (frame)); /* XXXJRT */
 347
 348   return (read_memory_integer (frame->frame + 4, 4));
 349 }
 350
 351 static CORE_ADDR
 352 ns32k_frame_args_address (struct frame_info *frame)
 353 {
 354   if (ns32k_get_enter_addr (frame->pc) > 1)
 355     return (frame->frame);
 356
 357   return (read_register (SP_REGNUM) - 4);
 358 }
 359
 360 static CORE_ADDR
 361 ns32k_frame_locals_address (struct frame_info *frame)
 362 {
 363   return (frame->frame);
 364 }
 365
 366 /* Code to initialize the addresses of the saved registers of frame described
 367    by FRAME_INFO.  This includes special registers such as pc and fp saved in
 368    special ways in the stack frame.  sp is even more special: the address we
 369    return for it IS the sp for the next frame.  */
 370
 371 static void
 372 ns32k_frame_init_saved_regs (struct frame_info *frame)
 373 {
 374   int regmask, regnum;
 375   int localcount;
 376   CORE_ADDR enter_addr, next_addr;
 377
 378   if (frame->saved_regs)
 379     return;
 380
 381   frame_saved_regs_zalloc (frame);
 382
 383   enter_addr = ns32k_get_enter_addr (frame->pc);
 384   if (enter_addr > 1)
 385     {
 386       regmask = read_memory_integer (enter_addr + 1, 1) & 0xff;
 387       localcount = ns32k_localcount (enter_addr);
 388       next_addr = frame->frame + localcount;
 389
 390       for (regnum = 0; regnum < 8; regnum++)
 391         {
 392           if (regmask & (1 << regnum))
 393             frame->saved_regs[regnum] = next_addr -= 4;
 394         }
 395
 396       frame->saved_regs[SP_REGNUM] = frame->frame + 4;
 397       frame->saved_regs[PC_REGNUM] = frame->frame + 4;
 398       frame->saved_regs[FP_REGNUM] = read_memory_integer (frame->frame, 4);
 399     }
 400   else if (enter_addr == 1)
 401     {
 402       CORE_ADDR sp = read_register (SP_REGNUM);
 403       frame->saved_regs[PC_REGNUM] = sp;
 404       frame->saved_regs[SP_REGNUM] = sp + 4;
 405     }
 406 }
 407
 408 static void
 409 ns32k_push_dummy_frame (void)
 410 {
 411   CORE_ADDR sp = read_register (SP_REGNUM);
 412   int regnum;
 413
 414   sp = push_word (sp, read_register (PC_REGNUM));
 415   sp = push_word (sp, read_register (FP_REGNUM));
 416   write_register (FP_REGNUM, sp);
 417
 418   for (regnum = 0; regnum < 8; regnum++)
 419     sp = push_word (sp, read_register (regnum));
 420
 421   write_register (SP_REGNUM, sp);
 422 }
 423
 424 static void
 425 ns32k_pop_frame (void)
 426 {
 427   struct frame_info *frame = get_current_frame ();
 428   CORE_ADDR fp;
 429   int regnum;
 430
 431   fp = frame->frame;
 432   FRAME_INIT_SAVED_REGS (frame);
 433
 434   for (regnum = 0; regnum < 8; regnum++)
 435     if (frame->saved_regs[regnum])
 436       write_register (regnum,
 437                       read_memory_integer (frame->saved_regs[regnum], 4));
 438
 439   write_register (FP_REGNUM, read_memory_integer (fp, 4));
 440   write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
 441   write_register (SP_REGNUM, fp + 8);
 442   flush_cached_frames ();
 443 }
 444 \f
 445 /* The NS32000 call dummy sequence:
 446
 447         enter   0xff,0                  82 ff 00
 448         jsr     @0x00010203             7f ae c0 01 02 03
 449         adjspd  0x69696969              7f a5 01 02 03 04
 450         bpt                             f2
 451
 452    It is 16 bytes long.  */
 453
 454 static LONGEST ns32k_call_dummy_words[] =
 455 {
 456   0x7f00ff82,
 457   0x0201c0ae,
 458   0x01a57f03,
 459   0xf2040302
 460 };
 461 static int sizeof_ns32k_call_dummy_words = sizeof (ns32k_call_dummy_words);
 462
 463 #define NS32K_CALL_DUMMY_ADDR         5
 464 #define NS32K_CALL_DUMMY_NARGS        11
 465
 466 static void
 467 ns32k_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
 468                       struct value **args, struct type *type, int gcc_p)
 469 {
 470   int flipped;
 471
 472   flipped = fun | 0xc0000000;
 473   flip_bytes (&flipped, 4);
 474   store_unsigned_integer (dummy + NS32K_CALL_DUMMY_ADDR, 4, flipped);
 475
 476   flipped = - nargs * 4;
 477   flip_bytes (&flipped, 4);
 478   store_unsigned_integer (dummy + NS32K_CALL_DUMMY_NARGS, 4, flipped);
 479 }
 480 \f
 481 static void
 482 ns32k_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
 483 {
 484   /* On this machine, this is a no-op (Encore Umax didn't use GCC).  */
 485 }
 486
 487 static void
 488 ns32k_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
 489 {
 490   memcpy (valbuf,
 491           regbuf + REGISTER_BYTE (TYPE_CODE (valtype) == TYPE_CODE_FLT ?
 492                                   FP0_REGNUM : 0), TYPE_LENGTH (valtype));
 493 }
 494
 495 static void
 496 ns32k_store_return_value (struct type *valtype, char *valbuf)
 497 {
 498   deprecated_write_register_bytes (TYPE_CODE (valtype) == TYPE_CODE_FLT
 499                                    ? FP0_REGNUM : 0, valbuf,
 500                                    TYPE_LENGTH (valtype));
 501 }
 502
 503 static CORE_ADDR
 504 ns32k_extract_struct_value_address (char *regbuf)
 505 {
 506   return (extract_address (regbuf + REGISTER_BYTE (0), REGISTER_RAW_SIZE (0)));
 507 }
 508 \f
 509 void
 510 ns32k_gdbarch_init_32082 (struct gdbarch *gdbarch)
 511 {
 512   set_gdbarch_num_regs (gdbarch, NS32K_NUM_REGS_32082);
 513
 514   set_gdbarch_register_name (gdbarch, ns32k_register_name_32082);
 515   set_gdbarch_register_bytes (gdbarch, NS32K_REGISTER_BYTES_32082);
 516   set_gdbarch_register_byte (gdbarch, ns32k_register_byte_32082);
 517 }
 518
 519 void
 520 ns32k_gdbarch_init_32382 (struct gdbarch *gdbarch)
 521 {
 522   set_gdbarch_num_regs (gdbarch, NS32K_NUM_REGS_32382);
 523
 524   set_gdbarch_register_name (gdbarch, ns32k_register_name_32382);
 525   set_gdbarch_register_bytes (gdbarch, NS32K_REGISTER_BYTES_32382);
 526   set_gdbarch_register_byte (gdbarch, ns32k_register_byte_32382);
 527 }
 528
 529 /* Initialize the current architecture based on INFO.  If possible, re-use an
 530    architecture from ARCHES, which is a list of architectures already created
 531    during this debugging session.
 532
 533    Called e.g. at program startup, when reading a core file, and when reading
 534    a binary file.  */
 535
 536 static struct gdbarch *
 537 ns32k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 538 {
 539   struct gdbarch_tdep *tdep;
 540   struct gdbarch *gdbarch;
 541   enum gdb_osabi osabi = GDB_OSABI_UNKNOWN;
 542
 543   /* Try to determine the OS ABI of the object we are loading.  */
 544   if (info.abfd != NULL)
 545     {
 546       osabi = gdbarch_lookup_osabi (info.abfd);
 547     }
 548
 549   /* Find a candidate among extant architectures.  */
 550   for (arches = gdbarch_list_lookup_by_info (arches, &info);
 551        arches != NULL;
 552        arches = gdbarch_list_lookup_by_info (arches->next, &info))
 553     {
 554       /* Make sure the OS ABI selection matches.  */
 555       tdep = gdbarch_tdep (arches->gdbarch);
 556       if (tdep && tdep->osabi == osabi)
 557         return arches->gdbarch;
 558     }
 559
 560   tdep = xmalloc (sizeof (struct gdbarch_tdep));
 561   gdbarch = gdbarch_alloc (&info, tdep);
 562
 563   /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
 564      ready to unwind the PC first (see frame.c:get_prev_frame()).  */
 565   set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
 566
 567   tdep->osabi = osabi;
 568
 569   /* Register info */
 570   ns32k_gdbarch_init_32082 (gdbarch);
 571   set_gdbarch_num_regs (gdbarch, NS32K_SP_REGNUM);
 572   set_gdbarch_num_regs (gdbarch, NS32K_FP_REGNUM);
 573   set_gdbarch_num_regs (gdbarch, NS32K_PC_REGNUM);
 574   set_gdbarch_num_regs (gdbarch, NS32K_PS_REGNUM);
 575
 576   set_gdbarch_register_size (gdbarch, NS32K_REGISTER_SIZE);
 577   set_gdbarch_register_raw_size (gdbarch, ns32k_register_raw_size);
 578   set_gdbarch_max_register_raw_size (gdbarch, NS32K_MAX_REGISTER_RAW_SIZE);
 579   set_gdbarch_register_virtual_size (gdbarch, ns32k_register_virtual_size);
 580   set_gdbarch_max_register_virtual_size (gdbarch,
 581                                          NS32K_MAX_REGISTER_VIRTUAL_SIZE);
 582   set_gdbarch_register_virtual_type (gdbarch, ns32k_register_virtual_type);
 583
 584   /* Frame and stack info */
 585   set_gdbarch_skip_prologue (gdbarch, umax_skip_prologue);
 586   set_gdbarch_saved_pc_after_call (gdbarch, ns32k_saved_pc_after_call);
 587
 588   set_gdbarch_frame_num_args (gdbarch, umax_frame_num_args);
 589   set_gdbarch_frameless_function_invocation (gdbarch,
 590                                    generic_frameless_function_invocation_not);
 591
 592   set_gdbarch_frame_chain (gdbarch, ns32k_frame_chain);
 593   set_gdbarch_frame_chain_valid (gdbarch, func_frame_chain_valid);
 594   set_gdbarch_frame_saved_pc (gdbarch, ns32k_frame_saved_pc);
 595
 596   set_gdbarch_frame_args_address (gdbarch, ns32k_frame_args_address);
 597   set_gdbarch_frame_locals_address (gdbarch, ns32k_frame_locals_address);
 598
 599   set_gdbarch_frame_init_saved_regs (gdbarch, ns32k_frame_init_saved_regs);
 600
 601   set_gdbarch_frame_args_skip (gdbarch, 8);
 602
 603   set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
 604
 605   /* Return value info */
 606   set_gdbarch_store_struct_return (gdbarch, ns32k_store_struct_return);
 607   set_gdbarch_deprecated_extract_return_value (gdbarch, ns32k_extract_return_value);
 608   set_gdbarch_deprecated_store_return_value (gdbarch, ns32k_store_return_value);
 609   set_gdbarch_deprecated_extract_struct_value_address (gdbarch,
 610                                             ns32k_extract_struct_value_address);
 611
 612   /* Call dummy info */
 613   set_gdbarch_push_dummy_frame (gdbarch, ns32k_push_dummy_frame);
 614   set_gdbarch_pop_frame (gdbarch, ns32k_pop_frame);
 615   set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
 616   set_gdbarch_call_dummy_p (gdbarch, 1);
 617   set_gdbarch_call_dummy_words (gdbarch, ns32k_call_dummy_words);
 618   set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof_ns32k_call_dummy_words);
 619   set_gdbarch_fix_call_dummy (gdbarch, ns32k_fix_call_dummy);
 620   set_gdbarch_call_dummy_start_offset (gdbarch, 3);
 621   set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 0);
 622   set_gdbarch_deprecated_use_generic_dummy_frames (gdbarch, 0);
 623   set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_on_stack);
 624   set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0);
 625
 626   /* Breakpoint info */
 627   set_gdbarch_decr_pc_after_break (gdbarch, 0);
 628   set_gdbarch_breakpoint_from_pc (gdbarch, ns32k_breakpoint_from_pc);
 629
 630   /* Misc info */
 631   set_gdbarch_function_start_offset (gdbarch, 0);
 632
 633   /* Hook in OS ABI-specific overrides, if they have been registered.  */
 634   gdbarch_init_osabi (info, gdbarch, osabi);
 635
 636   return (gdbarch);
 637 }
 638
 639 static void
 640 ns32k_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
 641 {
 642   struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
 643
 644   if (tdep == NULL)
 645     return;
 646
 647   fprintf_unfiltered (file, "ns32k_dump_tdep: OS ABI = %s\n",
 648                       gdbarch_osabi_name (tdep->osabi));
 649 }
 650
 651 void
 652 _initialize_ns32k_tdep (void)
 653 {
 654   gdbarch_register (bfd_arch_ns32k, ns32k_gdbarch_init, ns32k_dump_tdep);
 655
 656   tm_print_insn = print_insn_ns32k;
 657 }