gdb/vax-tdep.c

   1 /* Print VAX instructions for GDB, the GNU debugger.
   2    Copyright 1986, 1989, 1991, 1992, 1995, 1996, 1998, 1999, 2000, 2002, 2003
   3    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 "symtab.h"
  24 #include "opcode/vax.h"
  25 #include "gdbcore.h"
  26 #include "inferior.h"
  27 #include "regcache.h"
  28 #include "frame.h"
  29 #include "value.h"
  30 #include "arch-utils.h"
  31 #include "gdb_string.h"
  32 #include "osabi.h"
  33
  34 #include "vax-tdep.h"
  35
  36 static gdbarch_register_name_ftype vax_register_name;
  37 static gdbarch_register_byte_ftype vax_register_byte;
  38 static gdbarch_register_raw_size_ftype vax_register_raw_size;
  39 static gdbarch_register_virtual_size_ftype vax_register_virtual_size;
  40 static gdbarch_register_virtual_type_ftype vax_register_virtual_type;
  41
  42 static gdbarch_skip_prologue_ftype vax_skip_prologue;
  43 static gdbarch_saved_pc_after_call_ftype vax_saved_pc_after_call;
  44 static gdbarch_frame_num_args_ftype vax_frame_num_args;
  45 static gdbarch_deprecated_frame_chain_ftype vax_frame_chain;
  46 static gdbarch_frame_args_address_ftype vax_frame_args_address;
  47 static gdbarch_frame_locals_address_ftype vax_frame_locals_address;
  48
  49 static gdbarch_deprecated_extract_return_value_ftype vax_extract_return_value;
  50 static gdbarch_deprecated_extract_struct_value_address_ftype
  51     vax_extract_struct_value_address;
  52
  53 static gdbarch_deprecated_push_dummy_frame_ftype vax_push_dummy_frame;
  54 static gdbarch_fix_call_dummy_ftype vax_fix_call_dummy;
  55
  56 /* Return 1 if P points to an invalid floating point value.
  57    LEN is the length in bytes -- not relevant on the Vax.  */
  58
  59 /* FIXME: cagney/2002-01-19: The macro below was originally defined in
  60    tm-vax.h and used in values.c.  Two problems.  Firstly this is a
  61    very non-portable and secondly it is wrong.  The VAX should be
  62    using floatformat and associated methods to identify and handle
  63    invalid floating-point values.  Adding to the poor target's woes
  64    there is no floatformat_vax_{f,d} and no TARGET_FLOAT_FORMAT
  65    et.al..  */
  66
  67 /* FIXME: cagney/2002-01-19: It turns out that the only thing that
  68    uses this macro is the vax disassembler code (so how old is this
  69    target?).  This target should instead be using the opcodes
  70    disassembler.  That allowing the macro to be eliminated.  */
  71
  72 #define INVALID_FLOAT(p, len) ((*(short *) p & 0xff80) == 0x8000)
  73
  74 /* Vax instructions are never longer than this.  */
  75 #define MAXLEN 62
  76
  77 /* Number of elements in the opcode table.  */
  78 #define NOPCODES (sizeof votstrs / sizeof votstrs[0])
  79
  80 static unsigned char *print_insn_arg ();
  81 \f
  82 static const char *
  83 vax_register_name (int regno)
  84 {
  85   static char *register_names[] =
  86   {
  87     "r0",  "r1",  "r2",  "r3", "r4", "r5", "r6", "r7",
  88     "r8",  "r9", "r10", "r11", "ap", "fp", "sp", "pc",
  89     "ps",
  90   };
  91
  92   if (regno < 0)
  93     return (NULL);
  94   if (regno >= (sizeof(register_names) / sizeof(*register_names)))
  95     return (NULL);
  96   return (register_names[regno]);
  97 }
  98
  99 static int
 100 vax_register_byte (int regno)
 101 {
 102   return (regno * 4);
 103 }
 104
 105 static int
 106 vax_register_raw_size (int regno)
 107 {
 108   return (4);
 109 }
 110
 111 static int
 112 vax_register_virtual_size (int regno)
 113 {
 114   return (4);
 115 }
 116
 117 static struct type *
 118 vax_register_virtual_type (int regno)
 119 {
 120   return (builtin_type_int);
 121 }
 122 \f
 123 static void
 124 vax_frame_init_saved_regs (struct frame_info *frame)
 125 {
 126   int regnum, regmask;
 127   CORE_ADDR next_addr;
 128
 129   if (get_frame_saved_regs (frame))
 130     return;
 131
 132   frame_saved_regs_zalloc (frame);
 133
 134   regmask = read_memory_integer (get_frame_base (frame) + 4, 4) >> 16;
 135
 136   next_addr = get_frame_base (frame) + 16;
 137
 138   /* regmask's low bit is for register 0, which is the first one
 139      what would be pushed.  */
 140   for (regnum = 0; regnum < VAX_AP_REGNUM; regnum++)
 141     {
 142       if (regmask & (1 << regnum))
 143         get_frame_saved_regs (frame)[regnum] = next_addr += 4;
 144     }
 145
 146   get_frame_saved_regs (frame)[SP_REGNUM] = next_addr + 4;
 147   if (regmask & (1 << FP_REGNUM))
 148     get_frame_saved_regs (frame)[SP_REGNUM] +=
 149       4 + (4 * read_memory_integer (next_addr + 4, 4));
 150
 151   get_frame_saved_regs (frame)[PC_REGNUM] = get_frame_base (frame) + 16;
 152   get_frame_saved_regs (frame)[FP_REGNUM] = get_frame_base (frame) + 12;
 153   get_frame_saved_regs (frame)[VAX_AP_REGNUM] = get_frame_base (frame) + 8;
 154   get_frame_saved_regs (frame)[PS_REGNUM] = get_frame_base (frame) + 4;
 155 }
 156
 157 /* Get saved user PC for sigtramp from sigcontext for BSD style sigtramp.  */
 158
 159 static CORE_ADDR
 160 vax_sigtramp_saved_pc (struct frame_info *frame)
 161 {
 162   CORE_ADDR sigcontext_addr;
 163   char *buf;
 164   int ptrbytes = TYPE_LENGTH (builtin_type_void_func_ptr);
 165   int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
 166
 167   buf = alloca (ptrbytes);
 168   /* Get sigcontext address, it is the third parameter on the stack.  */
 169   if (get_next_frame (frame))
 170     sigcontext_addr = read_memory_typed_address
 171       (FRAME_ARGS_ADDRESS (get_next_frame (frame))
 172        + FRAME_ARGS_SKIP + sigcontext_offs,
 173        builtin_type_void_data_ptr);
 174   else
 175     sigcontext_addr = read_memory_typed_address
 176       (read_register (SP_REGNUM) + sigcontext_offs, builtin_type_void_data_ptr);
 177
 178   /* Don't cause a memory_error when accessing sigcontext in case the stack
 179      layout has changed or the stack is corrupt.  */
 180   target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
 181   return extract_typed_address (buf, builtin_type_void_func_ptr);
 182 }
 183
 184 static CORE_ADDR
 185 vax_frame_saved_pc (struct frame_info *frame)
 186 {
 187   if ((get_frame_type (frame) == SIGTRAMP_FRAME))
 188     return (vax_sigtramp_saved_pc (frame)); /* XXXJRT */
 189
 190   return (read_memory_integer (get_frame_base (frame) + 16, 4));
 191 }
 192
 193 CORE_ADDR
 194 vax_frame_args_address_correct (struct frame_info *frame)
 195 {
 196   /* Cannot find the AP register value directly from the FP value.  Must
 197      find it saved in the frame called by this one, or in the AP register
 198      for the innermost frame.  However, there is no way to tell the
 199      difference between the innermost frame and a frame for which we
 200      just don't know the frame that it called (e.g. "info frame 0x7ffec789").
 201      For the sake of argument, suppose that the stack is somewhat trashed
 202      (which is one reason that "info frame" exists).  So, return 0 (indicating
 203      we don't know the address of the arglist) if we don't know what frame
 204      this frame calls.  */
 205   if (get_next_frame (frame))
 206     return (read_memory_integer (get_frame_base (get_next_frame (frame)) + 8, 4));
 207
 208   return (0);
 209 }
 210
 211 static CORE_ADDR
 212 vax_frame_args_address (struct frame_info *frame)
 213 {
 214   /* In most of GDB, getting the args address is too important to
 215      just say "I don't know".  This is sometimes wrong for functions
 216      that aren't on top of the stack, but c'est la vie.  */
 217   if (get_next_frame (frame))
 218     return (read_memory_integer (get_frame_base (get_next_frame (frame)) + 8, 4));
 219
 220   return (read_register (VAX_AP_REGNUM));
 221 }
 222
 223 static CORE_ADDR
 224 vax_frame_locals_address (struct frame_info *frame)
 225 {
 226   return (get_frame_base (frame));
 227 }
 228
 229 static int
 230 vax_frame_num_args (struct frame_info *fi)
 231 {
 232   return (0xff & read_memory_integer (FRAME_ARGS_ADDRESS (fi), 1));
 233 }
 234
 235 static CORE_ADDR
 236 vax_frame_chain (struct frame_info *frame)
 237 {
 238   /* In the case of the VAX, the frame's nominal address is the FP value,
 239      and 12 bytes later comes the saved previous FP value as a 4-byte word.  */
 240   if (inside_entry_file (get_frame_pc (frame)))
 241     return (0);
 242
 243   return (read_memory_integer (get_frame_base (frame) + 12, 4));
 244 }
 245 \f
 246 static void
 247 vax_push_dummy_frame (void)
 248 {
 249   CORE_ADDR sp = read_register (SP_REGNUM);
 250   int regnum;
 251
 252   sp = push_word (sp, 0);       /* arglist */
 253   for (regnum = 11; regnum >= 0; regnum--)
 254     sp = push_word (sp, read_register (regnum));
 255   sp = push_word (sp, read_register (PC_REGNUM));
 256   sp = push_word (sp, read_register (FP_REGNUM));
 257   sp = push_word (sp, read_register (VAX_AP_REGNUM));
 258   sp = push_word (sp, (read_register (PS_REGNUM) & 0xffef) + 0x2fff0000);
 259   sp = push_word (sp, 0);
 260   write_register (SP_REGNUM, sp);
 261   write_register (FP_REGNUM, sp);
 262   write_register (VAX_AP_REGNUM, sp + (17 * 4));
 263 }
 264
 265 static void
 266 vax_pop_frame (void)
 267 {
 268   CORE_ADDR fp = read_register (FP_REGNUM);
 269   int regnum;
 270   int regmask = read_memory_integer (fp + 4, 4);
 271
 272   write_register (PS_REGNUM,
 273                   (regmask & 0xffff)
 274                   | (read_register (PS_REGNUM) & 0xffff0000));
 275   write_register (PC_REGNUM, read_memory_integer (fp + 16, 4));
 276   write_register (FP_REGNUM, read_memory_integer (fp + 12, 4));
 277   write_register (VAX_AP_REGNUM, read_memory_integer (fp + 8, 4));
 278   fp += 16;
 279   for (regnum = 0; regnum < 12; regnum++)
 280     if (regmask & (0x10000 << regnum))
 281       write_register (regnum, read_memory_integer (fp += 4, 4));
 282   fp = fp + 4 + ((regmask >> 30) & 3);
 283   if (regmask & 0x20000000)
 284     {
 285       regnum = read_memory_integer (fp, 4);
 286       fp += (regnum + 1) * 4;
 287     }
 288   write_register (SP_REGNUM, fp);
 289   flush_cached_frames ();
 290 }
 291
 292 /* The VAX call dummy sequence:
 293
 294         calls #69, @#32323232
 295         bpt
 296
 297    It is 8 bytes long.  The address and argc are patched by
 298    vax_fix_call_dummy().  */
 299 static LONGEST vax_call_dummy_words[] = { 0x329f69fb, 0x03323232 };
 300 static int sizeof_vax_call_dummy_words = sizeof(vax_call_dummy_words);
 301
 302 static void
 303 vax_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs,
 304                     struct value **args, struct type *type, int gcc_p)
 305 {
 306   dummy[1] = nargs;
 307   store_unsigned_integer (dummy + 3, 4, fun);
 308 }
 309 \f
 310 static void
 311 vax_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
 312 {
 313   write_register (1, addr);
 314 }
 315
 316 static void
 317 vax_extract_return_value (struct type *valtype, char *regbuf, char *valbuf)
 318 {
 319   memcpy (valbuf, regbuf + REGISTER_BYTE (0), TYPE_LENGTH (valtype));
 320 }
 321
 322 static void
 323 vax_store_return_value (struct type *valtype, char *valbuf)
 324 {
 325   deprecated_write_register_bytes (0, valbuf, TYPE_LENGTH (valtype));
 326 }
 327
 328 static CORE_ADDR
 329 vax_extract_struct_value_address (char *regbuf)
 330 {
 331   return (extract_address (regbuf + REGISTER_BYTE (0), REGISTER_RAW_SIZE (0)));
 332 }
 333 \f
 334 static const unsigned char *
 335 vax_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
 336 {
 337   static const unsigned char vax_breakpoint[] = { 3 };
 338
 339   *lenptr = sizeof(vax_breakpoint);
 340   return (vax_breakpoint);
 341 }
 342 \f
 343 /* Advance PC across any function entry prologue instructions
 344    to reach some "real" code.  */
 345
 346 static CORE_ADDR
 347 vax_skip_prologue (CORE_ADDR pc)
 348 {
 349   register int op = (unsigned char) read_memory_integer (pc, 1);
 350   if (op == 0x11)
 351     pc += 2;                    /* skip brb */
 352   if (op == 0x31)
 353     pc += 3;                    /* skip brw */
 354   if (op == 0xC2
 355       && ((unsigned char) read_memory_integer (pc + 2, 1)) == 0x5E)
 356     pc += 3;                    /* skip subl2 */
 357   if (op == 0x9E
 358       && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xAE
 359       && ((unsigned char) read_memory_integer (pc + 3, 1)) == 0x5E)
 360     pc += 4;                    /* skip movab */
 361   if (op == 0x9E
 362       && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xCE
 363       && ((unsigned char) read_memory_integer (pc + 4, 1)) == 0x5E)
 364     pc += 5;                    /* skip movab */
 365   if (op == 0x9E
 366       && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xEE
 367       && ((unsigned char) read_memory_integer (pc + 6, 1)) == 0x5E)
 368     pc += 7;                    /* skip movab */
 369   return pc;
 370 }
 371
 372 static CORE_ADDR
 373 vax_saved_pc_after_call (struct frame_info *frame)
 374 {
 375   return (DEPRECATED_FRAME_SAVED_PC(frame));
 376 }
 377 \f
 378 /* Print the vax instruction at address MEMADDR in debugged memory,
 379    from disassembler info INFO.
 380    Returns length of the instruction, in bytes.  */
 381
 382 static int
 383 vax_print_insn (CORE_ADDR memaddr, disassemble_info *info)
 384 {
 385   unsigned char buffer[MAXLEN];
 386   register int i;
 387   register unsigned char *p;
 388   const char *d;
 389
 390   int status = (*info->read_memory_func) (memaddr, buffer, MAXLEN, info);
 391   if (status != 0)
 392     {
 393       (*info->memory_error_func) (status, memaddr, info);
 394       return -1;
 395     }
 396
 397   for (i = 0; i < NOPCODES; i++)
 398     if (votstrs[i].detail.code == buffer[0]
 399         || votstrs[i].detail.code == *(unsigned short *) buffer)
 400       break;
 401
 402   /* Handle undefined instructions.  */
 403   if (i == NOPCODES)
 404     {
 405       (*info->fprintf_func) (info->stream, "0%o", buffer[0]);
 406       return 1;
 407     }
 408
 409   (*info->fprintf_func) (info->stream, "%s", votstrs[i].name);
 410
 411   /* Point at first byte of argument data,
 412      and at descriptor for first argument.  */
 413   p = buffer + 1 + (votstrs[i].detail.code >= 0x100);
 414   d = votstrs[i].detail.args;
 415
 416   if (*d)
 417     (*info->fprintf_func) (info->stream, " ");
 418
 419   while (*d)
 420     {
 421       p = print_insn_arg (d, p, memaddr + (p - buffer), info);
 422       d += 2;
 423       if (*d)
 424         (*info->fprintf_func) (info->stream, ",");
 425     }
 426   return p - buffer;
 427 }
 428 \f
 429 static unsigned char *
 430 print_insn_arg (char *d, register char *p, CORE_ADDR addr,
 431                 disassemble_info *info)
 432 {
 433   register int regnum = *p & 0xf;
 434   float floatlitbuf;
 435
 436   if (*d == 'b')
 437     {
 438       if (d[1] == 'b')
 439         (*info->fprintf_func) (info->stream, "0x%x", addr + *p++ + 1);
 440       else
 441         {
 442           (*info->fprintf_func) (info->stream, "0x%x", addr + *(short *) p + 2);
 443           p += 2;
 444         }
 445     }
 446   else
 447     switch ((*p++ >> 4) & 0xf)
 448       {
 449       case 0:
 450       case 1:
 451       case 2:
 452       case 3:                   /* Literal mode */
 453         if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h')
 454           {
 455             *(int *) &floatlitbuf = 0x4000 + ((p[-1] & 0x3f) << 4);
 456             (*info->fprintf_func) (info->stream, "$%f", floatlitbuf);
 457           }
 458         else
 459           (*info->fprintf_func) (info->stream, "$%d", p[-1] & 0x3f);
 460         break;
 461
 462       case 4:                   /* Indexed */
 463         p = (char *) print_insn_arg (d, p, addr + 1, info);
 464         (*info->fprintf_func) (info->stream, "[%s]", REGISTER_NAME (regnum));
 465         break;
 466
 467       case 5:                   /* Register */
 468         (*info->fprintf_func) (info->stream, REGISTER_NAME (regnum));
 469         break;
 470
 471       case 7:                   /* Autodecrement */
 472         (*info->fprintf_func) (info->stream, "-");
 473       case 6:                   /* Register deferred */
 474         (*info->fprintf_func) (info->stream, "(%s)", REGISTER_NAME (regnum));
 475         break;
 476
 477       case 9:                   /* Autoincrement deferred */
 478         (*info->fprintf_func) (info->stream, "@");
 479         if (regnum == PC_REGNUM)
 480           {
 481             (*info->fprintf_func) (info->stream, "#");
 482             info->target = *(long *) p;
 483             (*info->print_address_func) (info->target, info);
 484             p += 4;
 485             break;
 486           }
 487       case 8:                   /* Autoincrement */
 488         if (regnum == PC_REGNUM)
 489           {
 490             (*info->fprintf_func) (info->stream, "#");
 491             switch (d[1])
 492               {
 493               case 'b':
 494                 (*info->fprintf_func) (info->stream, "%d", *p++);
 495                 break;
 496
 497               case 'w':
 498                 (*info->fprintf_func) (info->stream, "%d", *(short *) p);
 499                 p += 2;
 500                 break;
 501
 502               case 'l':
 503                 (*info->fprintf_func) (info->stream, "%d", *(long *) p);
 504                 p += 4;
 505                 break;
 506
 507               case 'q':
 508                 (*info->fprintf_func) (info->stream, "0x%x%08x",
 509                                        ((long *) p)[1], ((long *) p)[0]);
 510                 p += 8;
 511                 break;
 512
 513               case 'o':
 514                 (*info->fprintf_func) (info->stream, "0x%x%08x%08x%08x",
 515                                        ((long *) p)[3], ((long *) p)[2],
 516                                        ((long *) p)[1], ((long *) p)[0]);
 517                 p += 16;
 518                 break;
 519
 520               case 'f':
 521                 if (INVALID_FLOAT (p, 4))
 522                   (*info->fprintf_func) (info->stream,
 523                                          "<<invalid float 0x%x>>",
 524                                          *(int *) p);
 525                 else
 526                   (*info->fprintf_func) (info->stream, "%f", *(float *) p);
 527                 p += 4;
 528                 break;
 529
 530               case 'd':
 531                 if (INVALID_FLOAT (p, 8))
 532                   (*info->fprintf_func) (info->stream,
 533                                          "<<invalid float 0x%x%08x>>",
 534                                          ((long *) p)[1], ((long *) p)[0]);
 535                 else
 536                   (*info->fprintf_func) (info->stream, "%f", *(double *) p);
 537                 p += 8;
 538                 break;
 539
 540               case 'g':
 541                 (*info->fprintf_func) (info->stream, "g-float");
 542                 p += 8;
 543                 break;
 544
 545               case 'h':
 546                 (*info->fprintf_func) (info->stream, "h-float");
 547                 p += 16;
 548                 break;
 549
 550               }
 551           }
 552         else
 553           (*info->fprintf_func) (info->stream, "(%s)+", REGISTER_NAME (regnum));
 554         break;
 555
 556       case 11:                  /* Byte displacement deferred */
 557         (*info->fprintf_func) (info->stream, "@");
 558       case 10:                  /* Byte displacement */
 559         if (regnum == PC_REGNUM)
 560           {
 561             info->target = addr + *p + 2;
 562             (*info->print_address_func) (info->target, info);
 563           }
 564         else
 565           (*info->fprintf_func) (info->stream, "%d(%s)", *p, REGISTER_NAME (regnum));
 566         p += 1;
 567         break;
 568
 569       case 13:                  /* Word displacement deferred */
 570         (*info->fprintf_func) (info->stream, "@");
 571       case 12:                  /* Word displacement */
 572         if (regnum == PC_REGNUM)
 573           {
 574             info->target = addr + *(short *) p + 3;
 575             (*info->print_address_func) (info->target, info);
 576           }
 577         else
 578           (*info->fprintf_func) (info->stream, "%d(%s)",
 579                                  *(short *) p, REGISTER_NAME (regnum));
 580         p += 2;
 581         break;
 582
 583       case 15:                  /* Long displacement deferred */
 584         (*info->fprintf_func) (info->stream, "@");
 585       case 14:                  /* Long displacement */
 586         if (regnum == PC_REGNUM)
 587           {
 588             info->target = addr + *(short *) p + 5;
 589             (*info->print_address_func) (info->target, info);
 590           }
 591         else
 592           (*info->fprintf_func) (info->stream, "%d(%s)",
 593                                  *(long *) p, REGISTER_NAME (regnum));
 594         p += 4;
 595       }
 596
 597   return (unsigned char *) p;
 598 }
 599 \f
 600 /* Initialize the current architecture based on INFO.  If possible, re-use an
 601    architecture from ARCHES, which is a list of architectures already created
 602    during this debugging session.
 603
 604    Called e.g. at program startup, when reading a core file, and when reading
 605    a binary file.  */
 606
 607 static struct gdbarch *
 608 vax_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 609 {
 610   struct gdbarch *gdbarch;
 611
 612   /* If there is already a candidate, use it.  */
 613   arches = gdbarch_list_lookup_by_info (arches, &info);
 614   if (arches != NULL)
 615     return arches->gdbarch;
 616
 617   gdbarch = gdbarch_alloc (&info, NULL);
 618
 619   /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
 620      ready to unwind the PC first (see frame.c:get_prev_frame()).  */
 621   set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
 622
 623   /* Register info */
 624   set_gdbarch_num_regs (gdbarch, VAX_NUM_REGS);
 625   set_gdbarch_sp_regnum (gdbarch, VAX_SP_REGNUM);
 626   set_gdbarch_fp_regnum (gdbarch, VAX_FP_REGNUM);
 627   set_gdbarch_pc_regnum (gdbarch, VAX_PC_REGNUM);
 628   set_gdbarch_ps_regnum (gdbarch, VAX_PS_REGNUM);
 629
 630   set_gdbarch_register_name (gdbarch, vax_register_name);
 631   set_gdbarch_register_size (gdbarch, VAX_REGISTER_SIZE);
 632   set_gdbarch_register_bytes (gdbarch, VAX_REGISTER_BYTES);
 633   set_gdbarch_register_byte (gdbarch, vax_register_byte);
 634   set_gdbarch_register_raw_size (gdbarch, vax_register_raw_size);
 635   set_gdbarch_deprecated_max_register_raw_size (gdbarch, VAX_MAX_REGISTER_RAW_SIZE);
 636   set_gdbarch_register_virtual_size (gdbarch, vax_register_virtual_size);
 637   set_gdbarch_deprecated_max_register_virtual_size (gdbarch,
 638                                          VAX_MAX_REGISTER_VIRTUAL_SIZE);
 639   set_gdbarch_register_virtual_type (gdbarch, vax_register_virtual_type);
 640
 641   /* Frame and stack info */
 642   set_gdbarch_skip_prologue (gdbarch, vax_skip_prologue);
 643   set_gdbarch_saved_pc_after_call (gdbarch, vax_saved_pc_after_call);
 644
 645   set_gdbarch_frame_num_args (gdbarch, vax_frame_num_args);
 646   set_gdbarch_frameless_function_invocation (gdbarch,
 647                                    generic_frameless_function_invocation_not);
 648
 649   set_gdbarch_deprecated_frame_chain (gdbarch, vax_frame_chain);
 650   set_gdbarch_deprecated_frame_saved_pc (gdbarch, vax_frame_saved_pc);
 651
 652   set_gdbarch_frame_args_address (gdbarch, vax_frame_args_address);
 653   set_gdbarch_frame_locals_address (gdbarch, vax_frame_locals_address);
 654
 655   set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, vax_frame_init_saved_regs);
 656
 657   set_gdbarch_frame_args_skip (gdbarch, 4);
 658
 659   set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
 660
 661   /* Return value info */
 662   set_gdbarch_deprecated_store_struct_return (gdbarch, vax_store_struct_return);
 663   set_gdbarch_deprecated_extract_return_value (gdbarch, vax_extract_return_value);
 664   set_gdbarch_deprecated_store_return_value (gdbarch, vax_store_return_value);
 665   set_gdbarch_deprecated_extract_struct_value_address (gdbarch, vax_extract_struct_value_address);
 666
 667   /* Call dummy info */
 668   set_gdbarch_deprecated_push_dummy_frame (gdbarch, vax_push_dummy_frame);
 669   set_gdbarch_deprecated_pop_frame (gdbarch, vax_pop_frame);
 670   set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
 671   set_gdbarch_call_dummy_words (gdbarch, vax_call_dummy_words);
 672   set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof_vax_call_dummy_words);
 673   set_gdbarch_fix_call_dummy (gdbarch, vax_fix_call_dummy);
 674   set_gdbarch_call_dummy_start_offset (gdbarch, 0);
 675   set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 7);
 676   set_gdbarch_deprecated_use_generic_dummy_frames (gdbarch, 0);
 677   set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_on_stack);
 678
 679   /* Breakpoint info */
 680   set_gdbarch_breakpoint_from_pc (gdbarch, vax_breakpoint_from_pc);
 681   set_gdbarch_decr_pc_after_break (gdbarch, 0);
 682
 683   /* Misc info */
 684   set_gdbarch_function_start_offset (gdbarch, 2);
 685   set_gdbarch_believe_pcc_promotion (gdbarch, 1);
 686
 687   /* Should be using push_dummy_call.  */
 688   set_gdbarch_deprecated_dummy_write_sp (gdbarch, generic_target_write_sp);
 689
 690   /* Hook in ABI-specific overrides, if they have been registered.  */
 691   gdbarch_init_osabi (info, gdbarch);
 692
 693   return (gdbarch);
 694 }
 695
 696 void
 697 _initialize_vax_tdep (void)
 698 {
 699   gdbarch_register (bfd_arch_vax, vax_gdbarch_init, NULL);
 700
 701   tm_print_insn = vax_print_insn;
 702 }