libguile/vm.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41
  42 #if HAVE_CONFIG_H
  43 #  include <config.h>
  44 #endif
  45
  46 #include <string.h>
  47 #include "vm-bootstrap.h"
  48 #include "frames.h"
  49 #include "instructions.h"
  50 #include "objcodes.h"
  51 #include "programs.h"
  52 #include "vm.h"
  53
  54 /* I sometimes use this for debugging. */
  55 #define vm_puts(OBJ)                            \
  56 {                                               \
  57   scm_display (OBJ, scm_current_error_port ()); \
  58   scm_newline (scm_current_error_port ());      \
  59 }
  60
  61 \f
  62 /*
  63  * VM Continuation
  64  */
  65
  66 scm_t_bits scm_tc16_vm_cont;
  67
  68
  69 #define SCM_VM_CONT_P(OBJ)      SCM_SMOB_PREDICATE (scm_tc16_vm_cont, OBJ)
  70 #define SCM_VM_CONT_VP(CONT)    ((struct scm_vm *) SCM_CELL_WORD_1 (CONT))
  71
  72 static SCM
  73 capture_vm_cont (struct scm_vm *vp)
  74 {
  75   struct scm_vm *p = scm_gc_malloc (sizeof (*p), "capture_vm_cont");
  76   p->stack_size = vp->stack_limit - vp->sp;
  77   p->stack_base = scm_gc_malloc (p->stack_size * sizeof (SCM),
  78                                  "capture_vm_cont");
  79   p->stack_limit = p->stack_base + p->stack_size - 2;
  80   p->ip = vp->ip;
  81   p->sp = (SCM *) (vp->stack_limit - vp->sp);
  82   p->fp = (SCM *) (vp->stack_limit - vp->fp);
  83   memcpy (p->stack_base, vp->sp + 1, vp->stack_size * sizeof (SCM));
  84   SCM_RETURN_NEWSMOB (scm_tc16_vm_cont, p);
  85 }
  86
  87 static void
  88 reinstate_vm_cont (struct scm_vm *vp, SCM cont)
  89 {
  90   struct scm_vm *p = SCM_VM_CONT_VP (cont);
  91   if (vp->stack_size < p->stack_size)
  92     {
  93       /* puts ("FIXME: Need to expand"); */
  94       abort ();
  95     }
  96   vp->ip = p->ip;
  97   vp->sp = vp->stack_limit - (int) p->sp;
  98   vp->fp = vp->stack_limit - (int) p->fp;
  99   memcpy (vp->sp + 1, p->stack_base, p->stack_size * sizeof (SCM));
 100 }
 101
 102 struct vm_unwind_data
 103 {
 104   struct scm_vm *vp;
 105   SCM *sp;
 106   SCM *fp;
 107   SCM this_frame;
 108 };
 109
 110 static void
 111 vm_reset_stack (void *data)
 112 {
 113   struct vm_unwind_data *w = data;
 114
 115   w->vp->sp = w->sp;
 116   w->vp->fp = w->fp;
 117   w->vp->this_frame = w->this_frame;
 118 }
 119
 120 static SCM
 121 vm_cont_mark (SCM obj)
 122 {
 123   SCM *p;
 124   struct scm_vm *vp = SCM_VM_CONT_VP (obj);
 125   for (p = vp->stack_base; p <= vp->stack_limit; p++)
 126     if (SCM_NIMP (*p))
 127       scm_gc_mark (*p);
 128   return SCM_BOOL_F;
 129 }
 130
 131 static scm_sizet
 132 vm_cont_free (SCM obj)
 133 {
 134   struct scm_vm *p = SCM_VM_CONT_VP (obj);
 135
 136   scm_gc_free (p->stack_base, p->stack_size * sizeof (SCM), "stack-base");
 137   scm_gc_free (p, sizeof (struct scm_vm), "vm");
 138
 139   return 0;
 140 }
 141
 142 \f
 143 /*
 144  * VM Internal functions
 145  */
 146
 147 SCM_SYMBOL (sym_vm_run, "vm-run");
 148 SCM_SYMBOL (sym_vm_error, "vm-error");
 149
 150 static scm_byte_t *
 151 vm_fetch_length (scm_byte_t *ip, size_t *lenp)
 152 {
 153   /* NOTE: format defined in system/vm/conv.scm */
 154   *lenp = *ip++;
 155   if (*lenp < 254)
 156     return ip;
 157   else if (*lenp == 254)
 158     {
 159       int b1 = *ip++;
 160       int b2 = *ip++;
 161       *lenp = (b1 << 8) + b2;
 162     }
 163   else
 164     {
 165       int b1 = *ip++;
 166       int b2 = *ip++;
 167       int b3 = *ip++;
 168       int b4 = *ip++;
 169       *lenp = (b1 << 24) + (b2 << 16) + (b3 << 8) + b4;
 170     }
 171   return ip;
 172 }
 173
 174 static SCM
 175 vm_heapify_frames_1 (struct scm_vm *vp, SCM *fp, SCM *sp, SCM **destp)
 176 {
 177   SCM frame;
 178   SCM *dl = SCM_FRAME_DYNAMIC_LINK (fp);
 179 #if 0
 180   SCM *src = SCM_FRAME_UPPER_ADDRESS (fp);
 181 #endif
 182   SCM *dest = SCM_FRAME_LOWER_ADDRESS (fp);
 183
 184   if (!dl)
 185     {
 186       /* The top frame */
 187       frame = scm_c_make_heap_frame (fp);
 188       fp = SCM_HEAP_FRAME_POINTER (frame);
 189       SCM_FRAME_HEAP_LINK (fp) = SCM_BOOL_T;
 190     }
 191   else
 192     {
 193       /* Child frames */
 194       SCM link = SCM_FRAME_HEAP_LINK (dl);
 195       if (!SCM_FALSEP (link))
 196         link = SCM_FRAME_LOWER_ADDRESS (dl)[-1]; /* self link */
 197       else
 198         link = vm_heapify_frames_1 (vp, dl, dest - 1, &dest);
 199       frame = scm_c_make_heap_frame (fp);
 200       fp = SCM_HEAP_FRAME_POINTER (frame);
 201       SCM_FRAME_HEAP_LINK (fp)    = link;
 202       SCM_FRAME_SET_DYNAMIC_LINK (fp, SCM_HEAP_FRAME_POINTER (link));
 203     }
 204
 205   /* Apparently the intention here is to be able to have a frame on the heap,
 206      but data on the stack, so that you can push as much as you want on the
 207      stack; but I think that it's currently causing borkage with nonlocal exits
 208      and the unwind handler, which reinstates the sp and fp, but it's no longer
 209      pointing at a valid stack frame. So disable for now, we'll get back to
 210      this later. */
 211 #if 0
 212   /* Move stack data */
 213   for (; src <= sp; src++, dest++)
 214     *dest = *src;
 215   *destp = dest;
 216 #endif
 217
 218   return frame;
 219 }
 220
 221 static SCM
 222 vm_heapify_frames (SCM vm)
 223 {
 224   struct scm_vm *vp = SCM_VM_DATA (vm);
 225   if (SCM_FALSEP (SCM_FRAME_HEAP_LINK (vp->fp)))
 226     {
 227       SCM *dest;
 228       vp->this_frame = vm_heapify_frames_1 (vp, vp->fp, vp->sp, &dest);
 229       vp->fp = SCM_HEAP_FRAME_POINTER (vp->this_frame);
 230       vp->sp = dest - 1;
 231     }
 232   return vp->this_frame;
 233 }
 234
 235 \f
 236 /*
 237  * VM
 238  */
 239
 240 #define VM_DEFAULT_STACK_SIZE   (16 * 1024)
 241
 242 #define VM_REGULAR_ENGINE       0
 243 #define VM_DEBUG_ENGINE         1
 244
 245 #if 0
 246 #define VM_NAME   vm_regular_engine
 247 #define VM_ENGINE VM_REGULAR_ENGINE
 248 #include "vm-engine.c"
 249 #undef VM_NAME
 250 #undef VM_ENGINE
 251 #endif
 252
 253 #define VM_NAME   vm_debug_engine
 254 #define VM_ENGINE VM_DEBUG_ENGINE
 255 #include "vm-engine.c"
 256 #undef VM_NAME
 257 #undef VM_ENGINE
 258
 259 scm_t_bits scm_tc16_vm;
 260
 261 static SCM the_vm;
 262
 263 static SCM
 264 make_vm (void)
 265 #define FUNC_NAME "make_vm"
 266 {
 267   int i;
 268   struct scm_vm *vp = scm_gc_malloc (sizeof (struct scm_vm), "vm");
 269
 270   vp->stack_size  = VM_DEFAULT_STACK_SIZE;
 271   vp->stack_base  = scm_gc_malloc (vp->stack_size * sizeof (SCM),
 272                                    "stack-base");
 273   vp->stack_limit = vp->stack_base + vp->stack_size - 3;
 274   vp->ip          = NULL;
 275   vp->sp          = vp->stack_base - 1;
 276   vp->fp          = NULL;
 277   vp->time        = 0;
 278   vp->clock       = 0;
 279   vp->options     = SCM_EOL;
 280   vp->this_frame  = SCM_BOOL_F;
 281   vp->last_frame  = SCM_BOOL_F;
 282   vp->last_ip     = NULL;
 283   for (i = 0; i < SCM_VM_NUM_HOOKS; i++)
 284     vp->hooks[i] = SCM_BOOL_F;
 285   SCM_RETURN_NEWSMOB (scm_tc16_vm, vp);
 286 }
 287 #undef FUNC_NAME
 288
 289 static SCM
 290 vm_mark (SCM obj)
 291 {
 292   int i;
 293   struct scm_vm *vp = SCM_VM_DATA (obj);
 294
 295   /* mark the stack conservatively */
 296   scm_mark_locations ((SCM_STACKITEM *) vp->stack_base,
 297                       sizeof (SCM) * (vp->sp - vp->stack_base + 1));
 298
 299   /* mark other objects  */
 300   for (i = 0; i < SCM_VM_NUM_HOOKS; i++)
 301     scm_gc_mark (vp->hooks[i]);
 302   scm_gc_mark (vp->this_frame);
 303   scm_gc_mark (vp->last_frame);
 304   return vp->options;
 305 }
 306
 307 static scm_sizet
 308 vm_free (SCM obj)
 309 {
 310   struct scm_vm *vp = SCM_VM_DATA (obj);
 311
 312   scm_gc_free (vp->stack_base, vp->stack_size * sizeof (SCM),
 313                "stack-base");
 314   scm_gc_free (vp, sizeof (struct scm_vm), "vm");
 315
 316   return 0;
 317 }
 318
 319 SCM_SYMBOL (sym_debug, "debug");
 320
 321 SCM
 322 scm_vm_apply (SCM vm, SCM program, SCM args)
 323 #define FUNC_NAME "scm_vm_apply"
 324 {
 325   SCM_VALIDATE_PROGRAM (1, program);
 326   return vm_run (vm, program, args);
 327 }
 328 #undef FUNC_NAME
 329
 330 /* Scheme interface */
 331
 332 SCM_DEFINE (scm_vm_version, "vm-version", 0, 0, 0,
 333             (void),
 334             "")
 335 #define FUNC_NAME s_scm_vm_version
 336 {
 337   return scm_from_locale_string (PACKAGE_VERSION);
 338 }
 339 #undef FUNC_NAME
 340
 341 SCM_DEFINE (scm_the_vm, "the-vm", 0, 0, 0,
 342             (void),
 343             "")
 344 #define FUNC_NAME s_scm_the_vm
 345 {
 346   return the_vm;
 347 }
 348 #undef FUNC_NAME
 349
 350
 351 SCM_DEFINE (scm_vm_p, "vm?", 1, 0, 0,
 352             (SCM obj),
 353             "")
 354 #define FUNC_NAME s_scm_vm_p
 355 {
 356   return SCM_BOOL (SCM_VM_P (obj));
 357 }
 358 #undef FUNC_NAME
 359
 360 SCM_DEFINE (scm_make_vm, "make-vm", 0, 0, 0,
 361             (void),
 362             "")
 363 #define FUNC_NAME s_scm_make_vm,
 364 {
 365   return make_vm ();
 366 }
 367 #undef FUNC_NAME
 368
 369 SCM_DEFINE (scm_vm_ip, "vm:ip", 1, 0, 0,
 370             (SCM vm),
 371             "")
 372 #define FUNC_NAME s_scm_vm_ip
 373 {
 374   SCM_VALIDATE_VM (1, vm);
 375   return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->ip);
 376 }
 377 #undef FUNC_NAME
 378
 379 SCM_DEFINE (scm_vm_sp, "vm:sp", 1, 0, 0,
 380             (SCM vm),
 381             "")
 382 #define FUNC_NAME s_scm_vm_sp
 383 {
 384   SCM_VALIDATE_VM (1, vm);
 385   return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->sp);
 386 }
 387 #undef FUNC_NAME
 388
 389 SCM_DEFINE (scm_vm_fp, "vm:fp", 1, 0, 0,
 390             (SCM vm),
 391             "")
 392 #define FUNC_NAME s_scm_vm_fp
 393 {
 394   SCM_VALIDATE_VM (1, vm);
 395   return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->fp);
 396 }
 397 #undef FUNC_NAME
 398
 399 #define VM_DEFINE_HOOK(n)                               \
 400 {                                                       \
 401   struct scm_vm *vp;                                    \
 402   SCM_VALIDATE_VM (1, vm);                              \
 403   vp = SCM_VM_DATA (vm);                                \
 404   if (SCM_FALSEP (vp->hooks[n]))                        \
 405     vp->hooks[n] = scm_make_hook (SCM_I_MAKINUM (1));   \
 406   return vp->hooks[n];                                  \
 407 }
 408
 409 SCM_DEFINE (scm_vm_boot_hook, "vm-boot-hook", 1, 0, 0,
 410             (SCM vm),
 411             "")
 412 #define FUNC_NAME s_scm_vm_boot_hook
 413 {
 414   VM_DEFINE_HOOK (SCM_VM_BOOT_HOOK);
 415 }
 416 #undef FUNC_NAME
 417
 418 SCM_DEFINE (scm_vm_halt_hook, "vm-halt-hook", 1, 0, 0,
 419             (SCM vm),
 420             "")
 421 #define FUNC_NAME s_scm_vm_halt_hook
 422 {
 423   VM_DEFINE_HOOK (SCM_VM_HALT_HOOK);
 424 }
 425 #undef FUNC_NAME
 426
 427 SCM_DEFINE (scm_vm_next_hook, "vm-next-hook", 1, 0, 0,
 428             (SCM vm),
 429             "")
 430 #define FUNC_NAME s_scm_vm_next_hook
 431 {
 432   VM_DEFINE_HOOK (SCM_VM_NEXT_HOOK);
 433 }
 434 #undef FUNC_NAME
 435
 436 SCM_DEFINE (scm_vm_break_hook, "vm-break-hook", 1, 0, 0,
 437             (SCM vm),
 438             "")
 439 #define FUNC_NAME s_scm_vm_break_hook
 440 {
 441   VM_DEFINE_HOOK (SCM_VM_BREAK_HOOK);
 442 }
 443 #undef FUNC_NAME
 444
 445 SCM_DEFINE (scm_vm_enter_hook, "vm-enter-hook", 1, 0, 0,
 446             (SCM vm),
 447             "")
 448 #define FUNC_NAME s_scm_vm_enter_hook
 449 {
 450   VM_DEFINE_HOOK (SCM_VM_ENTER_HOOK);
 451 }
 452 #undef FUNC_NAME
 453
 454 SCM_DEFINE (scm_vm_apply_hook, "vm-apply-hook", 1, 0, 0,
 455             (SCM vm),
 456             "")
 457 #define FUNC_NAME s_scm_vm_apply_hook
 458 {
 459   VM_DEFINE_HOOK (SCM_VM_APPLY_HOOK);
 460 }
 461 #undef FUNC_NAME
 462
 463 SCM_DEFINE (scm_vm_exit_hook, "vm-exit-hook", 1, 0, 0,
 464             (SCM vm),
 465             "")
 466 #define FUNC_NAME s_scm_vm_exit_hook
 467 {
 468   VM_DEFINE_HOOK (SCM_VM_EXIT_HOOK);
 469 }
 470 #undef FUNC_NAME
 471
 472 SCM_DEFINE (scm_vm_return_hook, "vm-return-hook", 1, 0, 0,
 473             (SCM vm),
 474             "")
 475 #define FUNC_NAME s_scm_vm_return_hook
 476 {
 477   VM_DEFINE_HOOK (SCM_VM_RETURN_HOOK);
 478 }
 479 #undef FUNC_NAME
 480
 481 SCM_DEFINE (scm_vm_option, "vm-option", 2, 0, 0,
 482             (SCM vm, SCM key),
 483             "")
 484 #define FUNC_NAME s_scm_vm_option
 485 {
 486   SCM_VALIDATE_VM (1, vm);
 487   return scm_assq_ref (SCM_VM_DATA (vm)->options, key);
 488 }
 489 #undef FUNC_NAME
 490
 491 SCM_DEFINE (scm_set_vm_option_x, "set-vm-option!", 3, 0, 0,
 492             (SCM vm, SCM key, SCM val),
 493             "")
 494 #define FUNC_NAME s_scm_set_vm_option_x
 495 {
 496   SCM_VALIDATE_VM (1, vm);
 497   SCM_VM_DATA (vm)->options
 498     = scm_assq_set_x (SCM_VM_DATA (vm)->options, key, val);
 499   return SCM_UNSPECIFIED;
 500 }
 501 #undef FUNC_NAME
 502
 503 SCM_DEFINE (scm_vm_stats, "vm-stats", 1, 0, 0,
 504             (SCM vm),
 505             "")
 506 #define FUNC_NAME s_scm_vm_stats
 507 {
 508   SCM stats;
 509
 510   SCM_VALIDATE_VM (1, vm);
 511
 512   stats = scm_make_vector (SCM_I_MAKINUM (2), SCM_UNSPECIFIED);
 513   scm_vector_set_x (stats, SCM_I_MAKINUM (0),
 514                     scm_from_ulong (SCM_VM_DATA (vm)->time));
 515   scm_vector_set_x (stats, SCM_I_MAKINUM (1),
 516                     scm_from_ulong (SCM_VM_DATA (vm)->clock));
 517
 518   return stats;
 519 }
 520 #undef FUNC_NAME
 521
 522 #define VM_CHECK_RUNNING(vm)                            \
 523   if (!SCM_VM_DATA (vm)->ip)                            \
 524     SCM_MISC_ERROR ("Not running", SCM_LIST1 (vm))
 525
 526 SCM_DEFINE (scm_vm_this_frame, "vm-this-frame", 1, 0, 0,
 527             (SCM vm),
 528             "")
 529 #define FUNC_NAME s_scm_vm_this_frame
 530 {
 531   SCM_VALIDATE_VM (1, vm);
 532   return SCM_VM_DATA (vm)->this_frame;
 533 }
 534 #undef FUNC_NAME
 535
 536 SCM_DEFINE (scm_vm_last_frame, "vm-last-frame", 1, 0, 0,
 537             (SCM vm),
 538             "")
 539 #define FUNC_NAME s_scm_vm_last_frame
 540 {
 541   SCM_VALIDATE_VM (1, vm);
 542   return SCM_VM_DATA (vm)->last_frame;
 543 }
 544 #undef FUNC_NAME
 545
 546 SCM_DEFINE (scm_vm_last_ip, "vm:last-ip", 1, 0, 0,
 547             (SCM vm),
 548             "")
 549 #define FUNC_NAME s_scm_vm_last_ip
 550 {
 551   SCM_VALIDATE_VM (1, vm);
 552   return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->last_ip);
 553 }
 554 #undef FUNC_NAME
 555
 556 SCM_DEFINE (scm_vm_save_stack, "vm-save-stack", 1, 0, 0,
 557             (SCM vm),
 558             "")
 559 #define FUNC_NAME s_scm_vm_save_stack
 560 {
 561   struct scm_vm *vp;
 562   SCM *dest;
 563   SCM_VALIDATE_VM (1, vm);
 564   vp = SCM_VM_DATA (vm);
 565
 566   if (vp->fp)
 567     {
 568       vp->last_frame = vm_heapify_frames_1 (vp, vp->fp, vp->sp, &dest);
 569       vp->last_ip = vp->ip;
 570     }
 571   else
 572     {
 573       vp->last_frame = SCM_BOOL_F;
 574     }
 575
 576
 577   return vp->last_frame;
 578 }
 579 #undef FUNC_NAME
 580
 581 SCM_DEFINE (scm_vm_fetch_code, "vm-fetch-code", 1, 0, 0,
 582             (SCM vm),
 583             "")
 584 #define FUNC_NAME s_scm_vm_fetch_code
 585 {
 586   int i;
 587   SCM list;
 588   scm_byte_t *ip;
 589   struct scm_instruction *p;
 590
 591   SCM_VALIDATE_VM (1, vm);
 592   VM_CHECK_RUNNING (vm);
 593
 594   ip = SCM_VM_DATA (vm)->ip;
 595   p = SCM_INSTRUCTION (*ip);
 596
 597   list = SCM_LIST1 (scm_str2symbol (p->name));
 598   for (i = 1; i <= p->len; i++)
 599     list = scm_cons (SCM_I_MAKINUM (ip[i]), list);
 600   return scm_reverse_x (list, SCM_EOL);
 601 }
 602 #undef FUNC_NAME
 603
 604 SCM_DEFINE (scm_vm_fetch_stack, "vm-fetch-stack", 1, 0, 0,
 605             (SCM vm),
 606             "")
 607 #define FUNC_NAME s_scm_vm_fetch_stack
 608 {
 609   SCM *sp;
 610   SCM ls = SCM_EOL;
 611   struct scm_vm *vp;
 612
 613   SCM_VALIDATE_VM (1, vm);
 614   VM_CHECK_RUNNING (vm);
 615
 616   vp = SCM_VM_DATA (vm);
 617   for (sp = vp->stack_base; sp <= vp->sp; sp++)
 618     ls = scm_cons (*sp, ls);
 619   return ls;
 620 }
 621 #undef FUNC_NAME
 622
 623 \f
 624 /*
 625  * Initialize
 626  */
 627
 628 SCM scm_load_compiled_with_vm (SCM file)
 629 {
 630   SCM program = scm_objcode_to_program (scm_load_objcode (file));
 631
 632   return vm_run (the_vm, program, SCM_EOL);
 633 }
 634
 635 void
 636 scm_bootstrap_vm (void)
 637 {
 638   static int strappage = 0;
 639
 640   if (strappage)
 641     return;
 642
 643   scm_bootstrap_frames ();
 644   scm_bootstrap_instructions ();
 645   scm_bootstrap_objcodes ();
 646   scm_bootstrap_programs ();
 647
 648   scm_tc16_vm_cont = scm_make_smob_type ("vm-cont", 0);
 649   scm_set_smob_mark (scm_tc16_vm_cont, vm_cont_mark);
 650   scm_set_smob_free (scm_tc16_vm_cont, vm_cont_free);
 651
 652   scm_tc16_vm = scm_make_smob_type ("vm", 0);
 653   scm_set_smob_mark (scm_tc16_vm, vm_mark);
 654   scm_set_smob_free (scm_tc16_vm, vm_free);
 655   scm_set_smob_apply (scm_tc16_vm, scm_vm_apply, 1, 0, 1);
 656
 657   the_vm = scm_permanent_object (make_vm ());
 658
 659   scm_c_define ("load-compiled",
 660                 scm_c_make_gsubr ("load-compiled/vm", 1, 0, 0,
 661                                   scm_load_compiled_with_vm));
 662
 663   strappage = 1;
 664 }
 665
 666 void
 667 scm_init_vm (void)
 668 {
 669   scm_bootstrap_vm ();
 670
 671 #ifndef SCM_MAGIC_SNARFER
 672 #include "vm.x"
 673 #endif
 674 }
 675
 676 /*
 677   Local Variables:
 678   c-file-style: "gnu"
 679   End:
 680 */