mono/mini/aot.c

   1 /*
   2  * aot.c: mono Ahead of Time compiler
   3  *
   4  * Author:
   5  *   Dietmar Maurer (dietmar@ximian.com)
   6  *
   7  * (C) 2002 Ximian, Inc.
   8  */
   9
  10 #include "config.h"
  11 #include <sys/types.h>
  12 #include <unistd.h>
  13 #include <fcntl.h>
  14 #include <string.h>
  15 #ifndef PLATFORM_WIN32
  16 #include <sys/mman.h>
  17 #else
  18 #include <windows.h>
  19 #endif
  20
  21 #include <limits.h>    /* for PAGESIZE */
  22 #ifndef PAGESIZE
  23 #define PAGESIZE 4096
  24 #endif
  25
  26 #include <mono/metadata/tabledefs.h>
  27 #include <mono/metadata/class.h>
  28 #include <mono/metadata/object.h>
  29 #include <mono/metadata/tokentype.h>
  30 #include <mono/metadata/appdomain.h>
  31 #include <mono/metadata/debug-helpers.h>
  32 #include <mono/metadata/assembly.h>
  33 #include <mono/metadata/marshal.h>
  34 #include <mono/os/gc_wrapper.h>
  35
  36 #include "mini.h"
  37
  38 #ifdef PLATFORM_WIN32
  39 #define SHARED_EXT ".dll"
  40 #else
  41 #define SHARED_EXT ".so"
  42 #endif
  43
  44 typedef struct MonoAotMethod {
  45         MonoJitInfo *info;
  46         MonoJumpInfo *patch_info;
  47 } MonoAotMethod;
  48
  49 typedef struct MonoAotModule {
  50         /* Optimization flags used to compile the module */
  51         guint32 opts;
  52         /* Maps MonoMethods to MonoAotMethodInfos */
  53         MonoGHashTable *methods;
  54         char **icall_table;
  55         MonoImage **image_table;
  56         guint32* methods_present_table;
  57 } MonoAotModule;
  58
  59 typedef struct MonoAotCompile {
  60         FILE *fp;
  61         GHashTable *ref_hash;
  62         GHashTable *icall_hash;
  63         GPtrArray *icall_table;
  64         GHashTable *image_hash;
  65         GPtrArray *image_table;
  66 } MonoAotCompile;
  67
  68 static MonoGHashTable *aot_modules;
  69
  70 static CRITICAL_SECTION aot_mutex;
  71
  72 static guint32 mono_aot_verbose = 0;
  73
  74 /*
  75  * Disabling this will make a copy of the loaded code and use the copy instead
  76  * of the original. This will place the caller and the callee close to each
  77  * other in memory, possibly improving cache behavior. Since the original
  78  * code is in copy-on-write memory, this will not increase the memory usage
  79  * of the runtime.
  80  */
  81 static gboolean use_loaded_code = FALSE;
  82
  83 /* For debugging */
  84 static gint32 mono_last_aot_method = -1;
  85
  86 static MonoClass *
  87 decode_class_info (MonoAotModule *module, gpointer *data)
  88 {
  89         MonoImage *image;
  90         MonoClass *klass;
  91
  92         image = module->image_table [(guint32)data [1]];
  93         g_assert (image);
  94
  95         if (data [0]) {
  96                 return mono_class_get (image, (guint32)data [0]);
  97         } else {
  98                 klass = decode_class_info (module, data [3]);
  99                 return mono_array_class_get (klass, (guint32)data [2]);
 100         }
 101
 102         return NULL;
 103 }
 104
 105 static void
 106 load_aot_module (MonoAssembly *assembly, gpointer user_data)
 107 {
 108         char *aot_name;
 109         MonoAotModule *info;
 110         gboolean usable = TRUE;
 111         char *saved_guid = NULL;
 112         char *aot_version = NULL;
 113         char *opt_flags = NULL;
 114
 115         aot_name = g_strdup_printf ("%s.so", assembly->image->name);
 116
 117         assembly->aot_module = g_module_open (aot_name, G_MODULE_BIND_LAZY);
 118
 119         if (!assembly->aot_module)
 120                 return;
 121
 122         g_module_symbol (assembly->aot_module, "mono_assembly_guid", (gpointer *) &saved_guid);
 123         g_module_symbol (assembly->aot_module, "mono_aot_version", (gpointer *) &aot_version);
 124         g_module_symbol (assembly->aot_module, "mono_aot_opt_flags", (gpointer *)&opt_flags);
 125
 126         if (!aot_version || strcmp (aot_version, MONO_AOT_FILE_VERSION)) {
 127                 if (mono_aot_verbose > 0)
 128                         printf ("AOT module %s has wrong file format version (expected %s got %s)\n", aot_name, MONO_AOT_FILE_VERSION, aot_version);
 129                 usable = FALSE;
 130         }
 131         else
 132                 if (!saved_guid || strcmp (assembly->image->guid, saved_guid)) {
 133                         if (mono_aot_verbose > 0)
 134                                 printf ("AOT module %s is out of date.\n", aot_name);
 135                         usable = FALSE;
 136                 }
 137
 138         if (!usable) {
 139                 g_free (aot_name);
 140                 g_module_close (assembly->aot_module);
 141                 assembly->aot_module = NULL;
 142                 return;
 143         }
 144
 145         /*
 146          * It seems that MonoGHashTables are in the GC heap, so structures
 147          * containing them must be in the GC heap as well :(
 148          */
 149 #ifdef HAVE_BOEHM_GC
 150         info = GC_MALLOC (sizeof (MonoAotModule));
 151 #else
 152         info = g_new0 (MonoAotModule, 1);
 153 #endif
 154         info->methods = mono_g_hash_table_new (NULL, NULL);
 155         sscanf (opt_flags, "%d", &info->opts);
 156
 157         /* Read image table */
 158         {
 159                 guint32 table_len, i;
 160                 char *table = NULL;
 161
 162                 g_module_symbol (assembly->aot_module, "mono_image_table", (gpointer *)&table);
 163                 g_assert (table);
 164
 165                 table_len = *(guint32*)table;
 166                 table += sizeof (guint32);
 167                 info->image_table = g_new0 (MonoImage*, table_len);
 168                 for (i = 0; i < table_len; ++i) {
 169                         info->image_table [i] = mono_image_loaded_by_guid (table);
 170                         if (!info->image_table [i]) {
 171                                 if (mono_aot_verbose > 0)
 172                                         printf ("AOT module %s is out of date.\n", aot_name);
 173                                 g_free (info->methods);
 174                                 g_free (info->image_table);
 175                                 g_free (info);
 176                                 g_free (aot_name);
 177                                 g_module_close (assembly->aot_module);
 178                                 assembly->aot_module = NULL;
 179                                 return;
 180                         }
 181                         table += strlen (table) + 1;
 182                 }
 183         }
 184
 185         /* Read icall table */
 186         {
 187                 guint32 table_len, i;
 188                 char *table = NULL;
 189
 190                 g_module_symbol (assembly->aot_module, "mono_icall_table", (gpointer *)&table);
 191                 g_assert (table);
 192
 193                 table_len = *(guint32*)table;
 194                 table += sizeof (guint32);
 195                 info->icall_table = g_new0 (char*, table_len);
 196                 for (i = 0; i < table_len; ++i) {
 197                         info->icall_table [i] = table;
 198                         table += strlen (table) + 1;
 199                 }
 200         }
 201
 202         /* Read methods present table */
 203         g_module_symbol (assembly->aot_module, "mono_methods_present_table", (gpointer *)&info->methods_present_table);
 204         g_assert (info->methods_present_table);
 205
 206         EnterCriticalSection (&aot_mutex);
 207         mono_g_hash_table_insert (aot_modules, assembly, info);
 208         LeaveCriticalSection (&aot_mutex);
 209
 210         if (mono_aot_verbose > 0)
 211                 printf ("Loaded AOT Module for %s.\n", assembly->image->name);
 212 }
 213
 214 void
 215 mono_aot_init (void)
 216 {
 217         InitializeCriticalSection (&aot_mutex);
 218
 219         aot_modules = mono_g_hash_table_new (NULL, NULL);
 220
 221         mono_install_assembly_load_hook (load_aot_module, NULL);
 222
 223         if (getenv ("MONO_LASTAOT"))
 224                 mono_last_aot_method = atoi (getenv ("MONO_LASTAOT"));
 225 }
 226
 227 static MonoJitInfo *
 228 mono_aot_get_method_inner (MonoDomain *domain, MonoMethod *method)
 229 {
 230         MonoClass *klass = method->klass;
 231         MonoAssembly *ass = klass->image->assembly;
 232         MonoJumpInfo *patch_info = NULL;
 233         GModule *module = ass->aot_module;
 234         char method_label [256];
 235         char info_label [256];
 236         guint8 *code = NULL;
 237         gpointer *info;
 238         guint code_len, used_int_regs, used_strings;
 239         MonoAotModule *aot_module;
 240         MonoAotMethod *minfo;
 241         MonoJitInfo *jinfo;
 242         MonoMethodHeader *header = ((MonoMethodNormal*)method)->header;
 243         int i;
 244
 245         if (!module)
 246                 return NULL;
 247
 248         if (!method->token)
 249                 return NULL;
 250
 251         if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
 252                 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
 253                 (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
 254                 (method->flags & METHOD_ATTRIBUTE_ABSTRACT))
 255                 return NULL;
 256
 257         aot_module = (MonoAotModule*)mono_g_hash_table_lookup (aot_modules, ass);
 258
 259         g_assert (klass->inited);
 260
 261         minfo = mono_g_hash_table_lookup (aot_module->methods, method);
 262         if (minfo) {
 263                 /* Duplicate jinfo */
 264                 jinfo = mono_mempool_alloc0 (domain->mp, sizeof (MonoJitInfo));
 265                 memcpy (jinfo, minfo->info, sizeof (MonoJitInfo));
 266                 if (jinfo->clauses) {
 267                         jinfo->clauses =
 268                                 mono_mempool_alloc0 (domain->mp, sizeof (MonoJitExceptionInfo) * header->num_clauses);
 269                         memcpy (jinfo->clauses, minfo->info->clauses, sizeof (MonoJitExceptionInfo) * header->num_clauses);
 270                 }
 271
 272                 /* This method was already loaded in another appdomain */
 273                 if (aot_module->opts & MONO_OPT_SHARED)
 274                         /* Use the same method in the new appdomain */
 275                         ;
 276                 else if (!minfo->patch_info)
 277                         /* Use the same method in the new appdomain */
 278                         ;
 279                 else {
 280                         /* Create a copy of the original method and apply relocations */
 281
 282                         code = mono_mempool_alloc (domain->code_mp, minfo->info->code_size);
 283                         memcpy (code, minfo->info->code_start, minfo->info->code_size);
 284
 285                         if (mono_aot_verbose > 1)
 286                                 printf ("REUSE METHOD: %s %p - %p.\n", mono_method_full_name (method, TRUE), code, (char*)code + code_len);
 287
 288                         /* Do this outside the lock to avoid deadlocks */
 289                         LeaveCriticalSection (&aot_mutex);
 290                         mono_arch_patch_code (method, domain, code, minfo->patch_info);
 291                         EnterCriticalSection (&aot_mutex);
 292
 293                         /* Relocate jinfo */
 294                         jinfo->code_start = code;
 295                         if (jinfo->clauses) {
 296                                 for (i = 0; i < header->num_clauses; ++i) {
 297                                         MonoJitExceptionInfo *ei = &jinfo->clauses [i];
 298                                         gint32 offset = code - (guint8*)minfo->info->code_start;
 299
 300                                         if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER)
 301                                                 ei->data.filter = (guint8*)ei->data.filter + offset;
 302                                         ei->try_start = (guint8*)ei->try_start + offset;
 303                                         ei->try_end = (guint8*)ei->try_end + offset;
 304                                         ei->handler_start = (guint8*)ei->handler_start + offset;
 305                                 }
 306                         }
 307                 }
 308
 309                 return jinfo;
 310         }
 311
 312         /* Do a fast check to see whenever the method exists */
 313         {
 314                 guint32 index = mono_metadata_token_index (method->token) - 1;
 315                 guint32 w;
 316                 w = aot_module->methods_present_table [index / 32];
 317                 if (! (w & (1 << (index % 32)))) {
 318                         if (mono_aot_verbose > 1)
 319                                 printf ("NOT FOUND: %s.\n", mono_method_full_name (method, TRUE));
 320                         return NULL;
 321                 }
 322         }
 323
 324         sprintf (method_label, "m_%x", mono_metadata_token_index (method->token));
 325
 326         if (!g_module_symbol (module, method_label, (gpointer *)&code))
 327                 return NULL;
 328
 329         sprintf (info_label, "%s_p", method_label);
 330
 331         if (!g_module_symbol (module, info_label, (gpointer *)&info))
 332                 return NULL;
 333
 334         if (mono_last_aot_method != -1) {
 335                 if (mono_jit_stats.methods_aot > mono_last_aot_method)
 336                                 return NULL;
 337                 else
 338                         if (mono_jit_stats.methods_aot == mono_last_aot_method)
 339                                 printf ("LAST AOT METHOD: %s.%s.%s.\n", klass->name_space, klass->name, method->name);
 340         }
 341
 342 #ifdef HAVE_BOEHM_GC
 343         minfo = GC_MALLOC (sizeof (MonoAotMethod));
 344 #else
 345         minfo = g_new0 (MonoAotMethod, 1);
 346 #endif
 347
 348         jinfo = mono_mempool_alloc0 (domain->mp, sizeof (MonoJitInfo));
 349
 350         code_len = GPOINTER_TO_UINT (*((gpointer **)info));
 351         info++;
 352         used_int_regs = GPOINTER_TO_UINT (*((gpointer **)info));
 353         info++;
 354
 355         if (!use_loaded_code) {
 356                 guint8 *code2;
 357                 code2 = mono_mempool_alloc (domain->code_mp, code_len);
 358                 memcpy (code2, code, code_len);
 359                 code = code2;
 360         }
 361
 362         if (mono_aot_verbose > 1)
 363                 printf ("FOUND AOT compiled code for %s %p - %p %p\n", mono_method_full_name (method, TRUE), code, code + code_len, info);
 364
 365         /* Exception table */
 366         if (header->num_clauses) {
 367                 jinfo->clauses =
 368                         mono_mempool_alloc0 (domain->mp, sizeof (MonoJitExceptionInfo) * header->num_clauses);
 369                 jinfo->num_clauses = header->num_clauses;
 370
 371                 jinfo->exvar_offset = GPOINTER_TO_UINT (*((gpointer**)info));
 372                 info ++;
 373
 374                 for (i = 0; i < header->num_clauses; ++i) {
 375                         MonoExceptionClause *ec = &header->clauses [i];
 376                         MonoJitExceptionInfo *ei = &jinfo->clauses [i];
 377
 378                         ei->flags = ec->flags;
 379                         if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER)
 380                                 ei->data.filter = code + GPOINTER_TO_UINT (*((gpointer**)info));
 381                         else
 382                                 ei->data.token = GPOINTER_TO_UINT (*((gpointer**)info));
 383                         info ++;
 384                         ei->try_start = code + GPOINTER_TO_UINT (*((gpointer**)info));
 385                         info ++;
 386                         ei->try_end = code + GPOINTER_TO_UINT (*((gpointer**)info));
 387                         info ++;
 388                         ei->handler_start = code + GPOINTER_TO_UINT (*((gpointer**)info));
 389                         info ++;
 390                 }
 391         }
 392
 393         if (aot_module->opts & MONO_OPT_SHARED) {
 394                 used_strings = GPOINTER_TO_UINT (*((gpointer **)info));
 395                 info++;
 396         }
 397         else
 398                 used_strings = 0;
 399
 400         for (i = 0; i < used_strings; i++) {
 401                 guint token =  GPOINTER_TO_UINT (*((gpointer **)info));
 402                 info++;
 403                 mono_ldstr (mono_root_domain, klass->image, mono_metadata_token_index (token));
 404         }
 405
 406         if (*info) {
 407                 MonoMemPool *mp;
 408                 MonoImage *image;
 409                 guint8 *page_start;
 410                 gpointer *table;
 411                 int pages;
 412                 int i, err;
 413                 guint32 last_offset;
 414
 415                 if (aot_module->opts & MONO_OPT_SHARED)
 416                         mp = mono_mempool_new ();
 417                 else
 418                         mp = domain->mp;
 419
 420                 last_offset = 0;
 421                 while (*info) {
 422                         MonoJumpInfo *ji = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfo));
 423                         gpointer *data;
 424
 425                         guint8 b1, b2;
 426
 427                         b1 = *(guint8*)info;
 428                         b2 = *((guint8*)info + 1);
 429
 430                         info = (gpointer*)((guint8*)info + 2);
 431
 432                         ji->type = b1 >> 2;
 433
 434                         if (((b1 & (1 + 2)) == 3) && (b2 == 255)) {
 435                                 ji->ip.i = GPOINTER_TO_UINT (*info);
 436                                 info ++;
 437                         }
 438                         else
 439                                 ji->ip.i = (((guint32)(b1 & (1 + 2))) << 8) + b2;
 440
 441                         ji->ip.i += last_offset;
 442                         last_offset = ji->ip.i;
 443                         //printf ("T: %d O: %d.\n", ji->type, ji->ip.i);
 444
 445                         data = *((gpointer **)info);
 446
 447                         switch (ji->type) {
 448                         case MONO_PATCH_INFO_CLASS:
 449                         case MONO_PATCH_INFO_IID:
 450                                 ji->data.klass = decode_class_info (aot_module, data);
 451                                 g_assert (ji->data.klass);
 452                                 mono_class_init (ji->data.klass);
 453                                 break;
 454                         case MONO_PATCH_INFO_VTABLE:
 455                         case MONO_PATCH_INFO_CLASS_INIT:
 456                                 ji->data.klass = decode_class_info (aot_module, data);
 457                                 g_assert (ji->data.klass);
 458                                 mono_class_init (ji->data.klass);
 459                                 break;
 460                         case MONO_PATCH_INFO_IMAGE:
 461                                 ji->data.image = aot_module->image_table [(guint32)data];
 462                                 g_assert (ji->data.image);
 463                                 break;
 464                         case MONO_PATCH_INFO_METHOD:
 465                         case MONO_PATCH_INFO_METHODCONST:
 466                         case MONO_PATCH_INFO_METHOD_JUMP: {
 467                                 guint32 image_index, token;
 468
 469                                 image_index = (guint32)data >> 24;
 470                                 token = MONO_TOKEN_METHOD_DEF | ((guint32)data & 0xffffff);
 471
 472                                 image = aot_module->image_table [image_index];
 473                                 ji->data.method = mono_get_method (image, token, NULL);
 474                                 g_assert (ji->data.method);
 475                                 mono_class_init (ji->data.method->klass);
 476
 477                                 break;
 478                         }
 479                         case MONO_PATCH_INFO_WRAPPER: {
 480                                 guint32 image_index, token;
 481                                 guint32 wrapper_type;
 482
 483                                 wrapper_type = (guint32)data[0];
 484                                 image_index = (guint32)data[1] >> 24;
 485                                 token = MONO_TOKEN_METHOD_DEF | ((guint32)data[1] & 0xffffff);
 486
 487                                 image = aot_module->image_table [image_index];
 488                                 ji->data.method = mono_get_method (image, token, NULL);
 489                                 g_assert (ji->data.method);
 490                                 mono_class_init (ji->data.method->klass);
 491
 492                                 g_assert (wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK);
 493                                 ji->type = MONO_PATCH_INFO_METHOD;
 494                                 ji->data.method = mono_marshal_get_remoting_invoke_with_check (ji->data.method);
 495                                 break;
 496                         }
 497                         case MONO_PATCH_INFO_FIELD:
 498                         case MONO_PATCH_INFO_SFLDA: {
 499                                 MonoClass *klass = decode_class_info (aot_module, data [1]);
 500                                 mono_class_init (klass);
 501                                 ji->data.field = mono_class_get_field (klass, (guint32)data [0]);
 502                                 break;
 503                         }
 504                         case MONO_PATCH_INFO_INTERNAL_METHOD:
 505                                 ji->data.name = aot_module->icall_table [(guint32)data];
 506                                 g_assert (ji->data.name);
 507                                 //printf ("A: %s.\n", ji->data.name);
 508                                 break;
 509                         case MONO_PATCH_INFO_SWITCH:
 510                                 ji->table_size = (int)data [0];
 511                                 table = g_new (gpointer, ji->table_size);
 512                                 ji->data.target = table;
 513                                 for (i = 0; i < ji->table_size; i++) {
 514                                         table [i] = data [i + 1];
 515                                 }
 516                                 break;
 517                         case MONO_PATCH_INFO_R4:
 518                         case MONO_PATCH_INFO_R8:
 519                                 ji->data.target = data;
 520                                 break;
 521                         case MONO_PATCH_INFO_LDSTR:
 522                         case MONO_PATCH_INFO_LDTOKEN:
 523                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
 524                                 image = aot_module->image_table [(int)data [0]];
 525                                 ji->data.token = mono_jump_info_token_new (mp, image, (int)data [1]);
 526                                 break;
 527                         case MONO_PATCH_INFO_EXC_NAME:
 528                                 ji->data.klass = decode_class_info (aot_module, data);
 529                                 g_assert (ji->data.klass);
 530                                 mono_class_init (ji->data.klass);
 531                                 ji->data.name = ji->data.klass->name;
 532                                 break;
 533                         case MONO_PATCH_INFO_METHOD_REL:
 534                                 ji->data.offset = (int)data [0];
 535                                 break;
 536                         default:
 537                                 g_warning ("unhandled type %d", ji->type);
 538                                 g_assert_not_reached ();
 539                         }
 540
 541                         info++;
 542                         ji->next = patch_info;
 543                         patch_info = ji;
 544                 }
 545
 546                 if (use_loaded_code) {
 547                 /* disable write protection */
 548 #ifndef PLATFORM_WIN32
 549                         page_start = (char *) (((int) (code)) & ~ (PAGESIZE - 1));
 550                         pages = (code + code_len - page_start + PAGESIZE - 1) / PAGESIZE;
 551                         err = mprotect (page_start, pages * PAGESIZE, PROT_READ | PROT_WRITE | PROT_EXEC);
 552                         g_assert (err == 0);
 553 #else
 554                         {
 555                                 DWORD oldp;
 556                                 g_assert (VirtualProtect (code, code_len, PAGE_EXECUTE_READWRITE, &oldp) != 0);
 557                         }
 558 #endif
 559                 }
 560
 561                 /* Do this outside the lock to avoid deadlocks */
 562                 LeaveCriticalSection (&aot_mutex);
 563                 mono_arch_patch_code (method, domain, code, patch_info);
 564                 EnterCriticalSection (&aot_mutex);
 565
 566                 if (aot_module->opts & MONO_OPT_SHARED)
 567                         /* No need to cache patches */
 568                         mono_mempool_destroy (mp);
 569                 else
 570                         minfo->patch_info = patch_info;
 571         }
 572
 573         mono_jit_stats.methods_aot++;
 574
 575         {
 576                 jinfo->code_size = code_len;
 577                 jinfo->used_regs = used_int_regs;
 578                 jinfo->method = method;
 579                 jinfo->code_start = code;
 580                 jinfo->domain_neutral = (aot_module->opts & MONO_OPT_SHARED) != 0;
 581
 582                 minfo->info = jinfo;
 583                 mono_g_hash_table_insert (aot_module->methods, method, minfo);
 584
 585                 return jinfo;
 586         }
 587 }
 588
 589 MonoJitInfo*
 590 mono_aot_get_method (MonoDomain *domain, MonoMethod *method)
 591 {
 592         MonoJitInfo *info;
 593
 594         EnterCriticalSection (&aot_mutex);
 595         info = mono_aot_get_method_inner (domain, method);
 596         LeaveCriticalSection (&aot_mutex);
 597
 598         /* Do this outside the lock */
 599         if (info) {
 600                 mono_jit_info_table_add (domain, info);
 601                 return info;
 602         }
 603         else
 604                 return NULL;
 605 }
 606
 607 #if 0
 608 static void
 609 write_data_symbol (FILE *fp, const char *name, guint8 *buf, int size, int align)
 610 {
 611         int i;
 612
 613         fprintf (fp, ".globl %s\n", name);
 614         fprintf (fp, ".text 1 \n\t.align %d\n", align);
 615         fprintf (fp, "\t.type %s,@object\n", name);
 616         fprintf (fp, "\t.size %s,%d\n", name, size);
 617         fprintf (fp, "%s:\n", name);
 618         for (i = 0; i < size; i++) {
 619                 fprintf (fp, ".byte %d\n", buf [i]);
 620         }
 621
 622 }
 623 #endif
 624
 625 static void
 626 write_string_symbol (FILE *fp, const char *name, const char *value)
 627 {
 628         fprintf (fp, ".globl %s\n", name);
 629         fprintf (fp, ".text 1\n");
 630         fprintf (fp, "%s:\n", name);
 631         fprintf (fp, "\t.string \"%s\"\n", value);
 632 }
 633
 634 static guint32
 635 mono_get_field_token (MonoClassField *field)
 636 {
 637         MonoClass *klass = field->parent;
 638         int i;
 639
 640         for (i = 0; i < klass->field.count; ++i) {
 641                 if (field == &klass->fields [i])
 642                         return MONO_TOKEN_FIELD_DEF | (klass->field.first + 1 + i);
 643         }
 644
 645         g_assert_not_reached ();
 646         return 0;
 647 }
 648
 649 static guint32
 650 get_image_index (MonoAotCompile *cfg, MonoImage *image)
 651 {
 652         guint32 index;
 653
 654         index = GPOINTER_TO_UINT (g_hash_table_lookup (cfg->image_hash, image));
 655         if (index)
 656                 return index - 1;
 657         else {
 658                 index = g_hash_table_size (cfg->image_hash);
 659                 g_hash_table_insert (cfg->image_hash, image, GUINT_TO_POINTER (index + 1));
 660                 g_ptr_array_add (cfg->image_table, image);
 661                 return index;
 662         }
 663 }
 664
 665 static void
 666 emit_image_index (MonoAotCompile *cfg, MonoImage *image)
 667 {
 668         guint32 image_index;
 669
 670         image_index = get_image_index (cfg, image);
 671
 672         fprintf (cfg->fp, "\t.long %d\n", image_index);
 673 }
 674
 675 static char *
 676 cond_emit_klass_label (MonoAotCompile *cfg, MonoClass *klass)
 677 {
 678         char *l1, *el = NULL;
 679
 680         if ((l1 = g_hash_table_lookup (cfg->ref_hash, klass)))
 681                 return l1;
 682
 683         if (!klass->type_token) {
 684                 g_assert (klass->rank > 0);
 685                 el = cond_emit_klass_label (cfg, klass->element_class);
 686         }
 687
 688         fprintf (cfg->fp, "\t.align %d\n", sizeof (gpointer));
 689         l1 = g_strdup_printf ("klass_p_%08x_%p", klass->type_token, klass);
 690         fprintf (cfg->fp, "%s:\n", l1);
 691         fprintf (cfg->fp, "\t.long 0x%08x\n", klass->type_token);
 692         emit_image_index (cfg, klass->image);
 693
 694         if (el) {
 695                 fprintf (cfg->fp, "\t.long %d\n", klass->rank);
 696                 fprintf (cfg->fp, "\t.long %s\n", el);
 697         }
 698
 699         g_hash_table_insert (cfg->ref_hash, klass, l1);
 700
 701         return l1;
 702 }
 703
 704 static char *
 705 cond_emit_field_label (MonoAotCompile *cfg, MonoJumpInfo *patch_info)
 706 {
 707         MonoClassField *field = patch_info->data.field;
 708         char *l1, *l2;
 709         guint token;
 710
 711         if ((l1 = g_hash_table_lookup (cfg->ref_hash, field)))
 712                 return l1;
 713
 714         l2 = cond_emit_klass_label (cfg, field->parent);
 715         fprintf (cfg->fp, "\t.align %d\n", sizeof (gpointer));
 716         token = mono_get_field_token (field);
 717         g_assert (token);
 718         l1 = g_strdup_printf ("klass_p_%08x_%p", token, field);
 719         fprintf (cfg->fp, "%s:\n", l1);
 720         fprintf (cfg->fp, "\t.long 0x%08x\n", token);
 721         fprintf (cfg->fp, "\t.long %s\n", l2);
 722
 723         g_hash_table_insert (cfg->ref_hash, field, l1);
 724
 725         return l1;
 726 }
 727
 728 static gint
 729 compare_patches (gconstpointer a, gconstpointer b)
 730 {
 731         int i, j;
 732
 733         i = (*(MonoJumpInfo**)a)->ip.i;
 734         j = (*(MonoJumpInfo**)b)->ip.i;
 735
 736         if (i < j)
 737                 return -1;
 738         else
 739                 if (i > j)
 740                         return 1;
 741         else
 742                 return 0;
 743 }
 744
 745 static void
 746 emit_method (MonoAotCompile *acfg, MonoCompile *cfg)
 747 {
 748         MonoMethod *method;
 749         GList *l;
 750         FILE *tmpfp;
 751         int i, j, k, pindex;
 752         guint8 *code, *mname;
 753         int func_alignment = 16;
 754         GPtrArray *patches;
 755         MonoJumpInfo *patch_info;
 756         MonoMethodHeader *header;
 757
 758         tmpfp = acfg->fp;
 759         method = cfg->method;
 760         code = cfg->native_code;
 761         header = ((MonoMethodNormal*)method)->header;
 762
 763         fprintf (tmpfp, ".text 0\n");
 764         mname = g_strdup_printf ("m_%x", mono_metadata_token_index (method->token));
 765         fprintf (tmpfp, "\t.align %d\n", func_alignment);
 766         fprintf (tmpfp, ".globl %s\n", mname);
 767         fprintf (tmpfp, "\t.type %s,@function\n", mname);
 768         fprintf (tmpfp, "%s:\n", mname);
 769
 770         for (i = 0; i < cfg->code_len; i++)
 771                 fprintf (tmpfp, ".byte %d\n", (unsigned int) code [i]);
 772
 773         fprintf (tmpfp, ".text 1\n");
 774
 775         /* Sort relocations */
 776         patches = g_ptr_array_new ();
 777         for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next)
 778                 g_ptr_array_add (patches, patch_info);
 779         g_ptr_array_sort (patches, compare_patches);
 780
 781         j = 0;
 782         for (pindex = 0; pindex < patches->len; ++pindex) {
 783                 patch_info = g_ptr_array_index (patches, pindex);
 784                 switch (patch_info->type) {
 785                 case MONO_PATCH_INFO_LABEL:
 786                 case MONO_PATCH_INFO_BB:
 787                         /* relative jumps are no problem, there is no need to handle then here */
 788                         break;
 789                 case MONO_PATCH_INFO_SWITCH: {
 790                         gpointer *table = (gpointer *)patch_info->data.target;
 791                         int k;
 792
 793                         fprintf (tmpfp, "\t.align %d\n", sizeof (gpointer));
 794                         fprintf (tmpfp, "%s_p_%d:\n", mname, j);
 795                         fprintf (tmpfp, "\t.long %d\n", patch_info->table_size);
 796
 797                         for (k = 0; k < patch_info->table_size; k++) {
 798                                 fprintf (tmpfp, "\t.long %d\n", (int)table [k]);
 799                         }
 800                         j++;
 801                         break;
 802                 }
 803                 case MONO_PATCH_INFO_INTERNAL_METHOD: {
 804                         guint32 icall_index;
 805
 806                         icall_index = (guint32)g_hash_table_lookup (acfg->icall_hash, patch_info->data.name);
 807                         if (!icall_index) {
 808                                 icall_index = g_hash_table_size (acfg->icall_hash) + 1;
 809                                 g_hash_table_insert (acfg->icall_hash, (gpointer)patch_info->data.name,
 810                                                                          GUINT_TO_POINTER (icall_index));
 811                                 g_ptr_array_add (acfg->icall_table, (gpointer)patch_info->data.name);
 812                         }
 813                         patch_info->data.name = g_strdup_printf ("%d", icall_index - 1);
 814                         j++;
 815                         break;
 816                 }
 817                 case MONO_PATCH_INFO_METHODCONST:
 818                 case MONO_PATCH_INFO_METHOD:
 819                 case MONO_PATCH_INFO_METHOD_JUMP: {
 820                         /*
 821                          * The majority of patches are for methods, so we emit
 822                          * them inline instead of defining a label for them to
 823                          * decrease the number of relocations.
 824                          */
 825                         guint32 image_index = get_image_index (acfg, patch_info->data.method->klass->image);
 826                         guint32 token = patch_info->data.method->token;
 827                         g_assert (image_index < 256);
 828                         g_assert (mono_metadata_token_table (token) == MONO_TABLE_METHOD);
 829
 830                         patch_info->data.name =
 831                                 g_strdup_printf ("%d", (image_index << 24) + (mono_metadata_token_index (token)));
 832                         j++;
 833                         break;
 834                 }
 835                 case MONO_PATCH_INFO_WRAPPER: {
 836                         MonoMethod *m;
 837                         guint32 image_index;
 838                         guint32 token;
 839
 840                         m = mono_marshal_method_from_wrapper (patch_info->data.method);
 841                         image_index = get_image_index (acfg, m->klass->image);
 842                         token = m->token;
 843                         g_assert (image_index < 256);
 844                         g_assert (mono_metadata_token_table (token) == MONO_TABLE_METHOD);
 845
 846                         fprintf (tmpfp, "\t.align %d\n", sizeof (gpointer));
 847                         fprintf (tmpfp, "%s_p_%d:\n", mname, j);
 848                         fprintf (tmpfp, "\t.long %d\n", patch_info->data.method->wrapper_type);
 849                         fprintf (tmpfp, "\t.long %d\n", (image_index << 24) + (mono_metadata_token_index (token)));
 850                         j++;
 851                         break;
 852                 }
 853                 case MONO_PATCH_INFO_FIELD:
 854                         patch_info->data.name = cond_emit_field_label (acfg, patch_info);
 855                         j++;
 856                         break;
 857                 case MONO_PATCH_INFO_CLASS:
 858                 case MONO_PATCH_INFO_IID:
 859                         patch_info->data.name = cond_emit_klass_label (acfg, patch_info->data.klass);
 860                         j++;
 861                         break;
 862                 case MONO_PATCH_INFO_IMAGE:
 863                         patch_info->data.name = g_strdup_printf ("%d", get_image_index (acfg, patch_info->data.image));
 864                         j++;
 865                         break;
 866                 case MONO_PATCH_INFO_EXC_NAME: {
 867                         MonoClass *ex_class;
 868
 869                         ex_class =
 870                                 mono_class_from_name (mono_defaults.exception_class->image,
 871                                                                           "System", patch_info->data.target);
 872                         g_assert (ex_class);
 873                         patch_info->data.name = cond_emit_klass_label (acfg, ex_class);
 874                         j++;
 875                         break;
 876                 }
 877                 case MONO_PATCH_INFO_R4:
 878                         fprintf (tmpfp, "\t.align 8\n");
 879                         fprintf (tmpfp, "%s_p_%d:\n", mname, j);
 880                         fprintf (tmpfp, "\t.long 0x%08x\n", *((guint32 *)patch_info->data.target));
 881                         j++;
 882                         break;
 883                 case MONO_PATCH_INFO_R8:
 884                         fprintf (tmpfp, "\t.align 8\n");
 885                         fprintf (tmpfp, "%s_p_%d:\n", mname, j);
 886                         fprintf (tmpfp, "\t.long 0x%08x\n", *((guint32 *)patch_info->data.target));
 887                         fprintf (tmpfp, "\t.long 0x%08x\n", *((guint32 *)patch_info->data.target + 1));
 888                         j++;
 889                         break;
 890                 case MONO_PATCH_INFO_METHOD_REL:
 891                         fprintf (tmpfp, "\t.align %d\n", sizeof (gpointer));
 892                         fprintf (tmpfp, "%s_p_%d:\n", mname, j);
 893                         fprintf (tmpfp, "\t.long 0x%08x\n", patch_info->data.offset);
 894                         j++;
 895                         break;
 896                 case MONO_PATCH_INFO_VTABLE:
 897                 case MONO_PATCH_INFO_CLASS_INIT:
 898                         patch_info->data.name = cond_emit_klass_label (acfg, patch_info->data.klass);
 899                         j++;
 900                         break;
 901                 case MONO_PATCH_INFO_SFLDA:
 902                         patch_info->data.name = cond_emit_field_label (acfg, patch_info);
 903                         j++;
 904                         break;
 905                 case MONO_PATCH_INFO_LDSTR:
 906                 case MONO_PATCH_INFO_LDTOKEN:
 907                 case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
 908                         fprintf (tmpfp, "\t.align 8\n");
 909                         fprintf (tmpfp, "%s_p_%d:\n", mname, j);
 910                         fprintf (tmpfp, "\t.long 0x%08x\n", get_image_index (acfg, patch_info->data.token->image));
 911                         fprintf (tmpfp, "\t.long 0x%08x\n", patch_info->data.token->token);
 912                         j++;
 913                         break;
 914                 default:
 915                         g_warning ("unable to handle jump info %d", patch_info->type);
 916                         g_assert_not_reached ();
 917                 }
 918         }
 919
 920         fprintf (tmpfp, ".globl %s_p\n", mname);
 921         fprintf (tmpfp, "\t.align %d\n", sizeof (gpointer));
 922         fprintf (tmpfp, "%s_p:\n", mname);
 923
 924         fprintf (tmpfp, "\t.long %d\n", cfg->code_len);
 925         fprintf (tmpfp, "\t.long %d\n", cfg->used_int_regs);
 926
 927         /* Exception table */
 928         if (header->num_clauses) {
 929                 MonoJitInfo *jinfo = cfg->jit_info;
 930
 931                 fprintf (tmpfp, "\t.long %d\n", jinfo->exvar_offset);
 932
 933                 for (k = 0; k < header->num_clauses; ++k) {
 934                         MonoJitExceptionInfo *ei = &jinfo->clauses [k];
 935
 936                         if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER)
 937                                 fprintf (tmpfp, "\t.long %d\n", (guint8*)ei->data.filter - code);
 938                         else
 939                                 /* fixme: tokens are not global */
 940                                 fprintf (tmpfp, "\t.long %d\n", ei->data.token);
 941
 942                         fprintf (tmpfp, "\t.long %d\n", (guint8*)ei->try_start - code);
 943                         fprintf (tmpfp, "\t.long %d\n", (guint8*)ei->try_end - code);
 944                         fprintf (tmpfp, "\t.long %d\n", (guint8*)ei->handler_start - code);
 945                 }
 946         }
 947
 948         /* String table */
 949         if (cfg->opt & MONO_OPT_SHARED) {
 950                 fprintf (tmpfp, "\t.long %d\n", g_list_length (cfg->ldstr_list));
 951                 for (l = cfg->ldstr_list; l; l = l->next) {
 952                         fprintf (tmpfp, "\t.long 0x%08lx\n", (long)l->data);
 953                 }
 954         }
 955         else
 956                 /* Used only in shared mode */
 957                 g_assert (!cfg->ldstr_list);
 958
 959         //printf ("M: %s (%s).\n", mono_method_full_name (method, TRUE), mname);
 960
 961         if (j) {
 962                 guint32 last_offset;
 963                 last_offset = 0;
 964
 965                 j = 0;
 966                 for (pindex = 0; pindex < patches->len; ++pindex) {
 967                         guint32 offset;
 968                         patch_info = g_ptr_array_index (patches, pindex);
 969
 970                         if ((patch_info->type == MONO_PATCH_INFO_LABEL) ||
 971                                 (patch_info->type == MONO_PATCH_INFO_BB))
 972                                 /* Nothing to do */
 973                                 continue;
 974
 975                         //printf ("T: %d O: %d.\n", patch_info->type, patch_info->ip.i);
 976                         offset = patch_info->ip.i - last_offset;
 977                         last_offset = patch_info->ip.i;
 978
 979                         /* Encode type+position compactly */
 980                         g_assert (patch_info->type < 64);
 981                         if (offset < 1024 - 1) {
 982                                 fprintf (tmpfp, "\t.byte %d\n", (patch_info->type << 2) + (offset >> 8));
 983                                 fprintf (tmpfp, "\t.byte %d\n", offset & ((1 << 8) - 1));
 984                         }
 985                         else {
 986                                 fprintf (tmpfp, "\t.byte %d\n", (patch_info->type << 2) + 3);
 987                                 fprintf (tmpfp, "\t.byte %d\n", 255);
 988                                 fprintf (tmpfp, "\t.long %d\n", offset);
 989                         }
 990
 991                         switch (patch_info->type) {
 992                         case MONO_PATCH_INFO_METHODCONST:
 993                         case MONO_PATCH_INFO_METHOD:
 994                         case MONO_PATCH_INFO_METHOD_JUMP:
 995                         case MONO_PATCH_INFO_CLASS:
 996                         case MONO_PATCH_INFO_IID:
 997                         case MONO_PATCH_INFO_FIELD:
 998                         case MONO_PATCH_INFO_INTERNAL_METHOD:
 999                         case MONO_PATCH_INFO_IMAGE:
1000                         case MONO_PATCH_INFO_VTABLE:
1001                         case MONO_PATCH_INFO_CLASS_INIT:
1002                         case MONO_PATCH_INFO_SFLDA:
1003                         case MONO_PATCH_INFO_EXC_NAME:
1004                                 fprintf (tmpfp, "\t.long %s\n", patch_info->data.name);
1005                                 j++;
1006                                 break;
1007                         case MONO_PATCH_INFO_SWITCH:
1008                         case MONO_PATCH_INFO_R4:
1009                         case MONO_PATCH_INFO_R8:
1010                         case MONO_PATCH_INFO_METHOD_REL:
1011                         case MONO_PATCH_INFO_LDSTR:
1012                         case MONO_PATCH_INFO_LDTOKEN:
1013                         case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
1014                         case MONO_PATCH_INFO_WRAPPER:
1015                                 fprintf (tmpfp, "\t.long %s_p_%d\n", mname, j);
1016                                 j++;
1017                                 break;
1018                         case MONO_PATCH_INFO_LABEL:
1019                         case MONO_PATCH_INFO_BB:
1020                                 break;
1021                         default:
1022                                 g_warning ("unable to handle jump info %d", patch_info->type);
1023                                 g_assert_not_reached ();
1024                         }
1025
1026                 }
1027         }
1028
1029         /*
1030          * 0 is PATCH_INFO_BB, which can't be in the file.
1031          */
1032         /* NULL terminated array */
1033         fprintf (tmpfp, "\t.long 0\n");
1034
1035         /* fixme: save the rest of the required infos */
1036
1037         g_free (mname);
1038 }
1039
1040 int
1041 mono_compile_assembly (MonoAssembly *ass, guint32 opts)
1042 {
1043         MonoCompile *cfg;
1044         MonoImage *image = ass->image;
1045         MonoMethod *method;
1046         char *com, *tmpfname, *opts_str;
1047         FILE *tmpfp;
1048         int i;
1049         guint8 *symbol;
1050         int ccount = 0, mcount = 0, lmfcount = 0, abscount = 0, wrappercount = 0, ocount = 0;
1051         GHashTable *ref_hash;
1052         MonoAotCompile *acfg;
1053         gboolean *emitted;
1054
1055         printf ("Mono Ahead of Time compiler - compiling assembly %s\n", image->name);
1056
1057         i = g_file_open_tmp ("mono_aot_XXXXXX", &tmpfname, NULL);
1058         tmpfp = fdopen (i, "w+");
1059         g_assert (tmpfp);
1060
1061         ref_hash = g_hash_table_new (NULL, NULL);
1062
1063         acfg = g_new0 (MonoAotCompile, 1);
1064         acfg->fp = tmpfp;
1065         acfg->ref_hash = ref_hash;
1066         acfg->icall_hash = g_hash_table_new (NULL, NULL);
1067         acfg->icall_table = g_ptr_array_new ();
1068         acfg->image_hash = g_hash_table_new (NULL, NULL);
1069         acfg->image_table = g_ptr_array_new ();
1070
1071         write_string_symbol (tmpfp, "mono_assembly_guid" , image->guid);
1072
1073         write_string_symbol (tmpfp, "mono_aot_version", MONO_AOT_FILE_VERSION);
1074
1075         opts_str = g_strdup_printf ("%d", opts);
1076         write_string_symbol (tmpfp, "mono_aot_opt_flags", opts_str);
1077         g_free (opts_str);
1078
1079         emitted = g_new0 (gboolean, image->tables [MONO_TABLE_METHOD].rows);
1080
1081         for (i = 0; i < image->tables [MONO_TABLE_METHOD].rows; ++i) {
1082                 MonoJumpInfo *patch_info;
1083                 gboolean skip;
1084                 guint32 token = MONO_TOKEN_METHOD_DEF | (i + 1);
1085                 method = mono_get_method (image, token, NULL);
1086
1087                 /* fixme: maybe we can also precompile wrapper methods */
1088                 if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
1089                     (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
1090                     (method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
1091                     (method->flags & METHOD_ATTRIBUTE_ABSTRACT)) {
1092                         //printf ("Skip (impossible): %s\n", mono_method_full_name (method, TRUE));
1093                         continue;
1094                 }
1095
1096                 mcount++;
1097
1098                 /* fixme: we need to patch the IP for the LMF in that case */
1099                 if (method->save_lmf) {
1100                         //printf ("Skip (needs lmf):  %s\n", mono_method_full_name (method, TRUE));
1101                         lmfcount++;
1102                         continue;
1103                 }
1104
1105                 //printf ("START:           %s\n", mono_method_full_name (method, TRUE));
1106                 //mono_compile_method (method);
1107
1108                 cfg = mini_method_compile (method, opts, mono_root_domain, 0);
1109                 g_assert (cfg);
1110
1111                 if (cfg->disable_aot) {
1112                         printf ("Skip (other): %s\n", mono_method_full_name (method, TRUE));
1113                         ocount++;
1114                         continue;
1115                 }
1116
1117                 skip = FALSE;
1118                 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
1119                         if (patch_info->type == MONO_PATCH_INFO_ABS) {
1120                                 /* unable to handle this */
1121                                 //printf ("Skip (abs addr):   %s %d\n", mono_method_full_name (method, TRUE), patch_info->type);
1122                                 skip = TRUE;
1123                                 break;
1124                         }
1125                 }
1126
1127                 if (skip) {
1128                         abscount++;
1129                         continue;
1130                 }
1131
1132                 /* remoting-invoke-with-check wrappers are very common */
1133                 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
1134                         if ((patch_info->type == MONO_PATCH_INFO_METHOD) &&
1135                                 ((patch_info->data.method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK)))
1136                                 patch_info->type = MONO_PATCH_INFO_WRAPPER;
1137                 }
1138
1139                 skip = FALSE;
1140                 for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
1141                         if ((patch_info->type == MONO_PATCH_INFO_METHOD ||
1142                              patch_info->type == MONO_PATCH_INFO_METHODCONST) &&
1143                             patch_info->data.method->wrapper_type) {
1144                                 /* unable to handle this */
1145                                 //printf ("Skip (wrapper call):   %s %d -> %s\n", mono_method_full_name (method, TRUE), patch_info->type, mono_method_full_name (patch_info->data.method, TRUE));
1146                                 skip = TRUE;
1147                                 break;
1148                         }
1149                 }
1150
1151                 if (skip) {
1152                         wrappercount++;
1153                         continue;
1154                 }
1155
1156                 //printf ("Compile:           %s\n", mono_method_full_name (method, TRUE));
1157
1158                 emitted [i] = TRUE;
1159                 emit_method (acfg, cfg);
1160
1161                 mono_destroy_compile (cfg);
1162
1163                 ccount++;
1164         }
1165
1166         /*
1167          * The icall and image tables are small but referenced in a lot of places.
1168          * So we emit them at once, and reference their elements by an index
1169          * instead of an assembly label to cut back on the number of relocations.
1170          */
1171
1172         /* Emit icall table */
1173
1174         symbol = g_strdup_printf ("mono_icall_table");
1175         fprintf (tmpfp, ".globl %s\n", symbol);
1176         fprintf (tmpfp, ".text 1 \n");
1177         fprintf (tmpfp, "\t.align 8\n");
1178         fprintf (tmpfp, "%s:\n", symbol);
1179         fprintf (tmpfp, ".long %d\n", acfg->icall_table->len);
1180         for (i = 0; i < acfg->icall_table->len; i++)
1181                 fprintf (tmpfp, ".string \"%s\"\n", (char*)g_ptr_array_index (acfg->icall_table, i));
1182
1183         /* Emit image table */
1184
1185         symbol = g_strdup_printf ("mono_image_table");
1186         fprintf (tmpfp, ".globl %s\n", symbol);
1187         fprintf (tmpfp, ".text 1 \n");
1188         fprintf (tmpfp, "\t.align 8\n");
1189         fprintf (tmpfp, "%s:\n", symbol);
1190         fprintf (tmpfp, ".long %d\n", acfg->image_table->len);
1191         for (i = 0; i < acfg->image_table->len; i++)
1192                 fprintf (tmpfp, ".string \"%s\"\n", ((MonoImage*)g_ptr_array_index (acfg->image_table, i))->guid);
1193
1194         /*
1195          * g_module_symbol takes a lot of time for failed lookups, so we emit
1196          * a table which contains one bit for each method. This bit specifies
1197          * whenever the method is emitted or not.
1198          */
1199
1200         symbol = g_strdup_printf ("mono_methods_present_table");
1201         fprintf (tmpfp, ".globl %s\n", symbol);
1202         fprintf (tmpfp, ".text 1 \n");
1203         fprintf (tmpfp, "\t.align 8\n");
1204         fprintf (tmpfp, "%s:\n", symbol);
1205         {
1206                 guint32 k, nrows;
1207                 guint32 w;
1208
1209                 nrows = image->tables [MONO_TABLE_METHOD].rows;
1210                 for (i = 0; i < nrows / 32 + 1; ++i) {
1211                         w = 0;
1212                         for (k = 0; k < 32; ++k) {
1213                                 if (emitted [(i * 32) + k])
1214                                         w += (1 << k);
1215                         }
1216                         //printf ("EMITTED [%d] = %d.\n", i, b);
1217                         fprintf (tmpfp, "\t.long %d\n", w);
1218                 }
1219         }
1220
1221         fclose (tmpfp);
1222
1223         com = g_strdup_printf ("as %s -o %s.o", tmpfname, tmpfname);
1224         printf ("Executing the native assembler: %s\n", com);
1225         system (com);
1226         g_free (com);
1227         com = g_strdup_printf ("ld -shared -o %s%s %s.o", image->name, SHARED_EXT, tmpfname);
1228         printf ("Executing the native linker: %s\n", com);
1229         system (com);
1230         g_free (com);
1231         com = g_strdup_printf ("%s.o", tmpfname);
1232         unlink (com);
1233         g_free (com);
1234         /*com = g_strdup_printf ("strip --strip-unneeded %s%s", image->name, SHARED_EXT);
1235         printf ("Stripping the binary: %s\n", com);
1236         system (com);
1237         g_free (com);*/
1238
1239         printf ("Compiled %d out of %d methods (%d%%)\n", ccount, mcount, (ccount*100)/mcount);
1240         printf ("%d methods contain absolute addresses (%d%%)\n", abscount, (abscount*100)/mcount);
1241         printf ("%d methods contain wrapper references (%d%%)\n", wrappercount, (wrappercount*100)/mcount);
1242         printf ("%d methods contain lmf pointers (%d%%)\n", lmfcount, (lmfcount*100)/mcount);
1243         printf ("%d methods have other problems (%d%%)\n", ocount, (ocount*100)/mcount);
1244         unlink (tmpfname);
1245
1246         return 0;
1247 }
1248
1249