nsz Git - libfirm/blob - ir/be/begnuas.c

   1 /*
   2  * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief       Dumps global variables and constants as gas assembler.
  23  * @author      Christian Wuerdig, Matthias Braun
  24  * @date        04.11.2005
  25  */
  26 #include "config.h"
  27
  28 #include "begnuas.h"
  29
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <ctype.h>
  33 #include <assert.h>
  34
  35 #include "obst.h"
  36 #include "tv.h"
  37 #include "irnode.h"
  38 #include "irprog.h"
  39 #include "entity_t.h"
  40 #include "error.h"
  41 #include "util.h"
  42
  43 #include "be_t.h"
  44 #include "beemitter.h"
  45 #include "bedwarf.h"
  46
  47 /** by default, we generate assembler code for the Linux gas */
  48 object_file_format_t  be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF;
  49 elf_variant_t         be_gas_elf_variant        = ELF_VARIANT_NORMAL;
  50 bool                  be_gas_emit_types         = true;
  51 char                  be_gas_elf_type_char      = '@';
  52
  53 static be_gas_section_t current_section = (be_gas_section_t) -1;
  54 static pmap            *block_numbers;
  55 static unsigned         next_block_nr;
  56
  57 /**
  58  * An environment containing all needed dumper data.
  59  * Currently we create the file completely in memory first, then
  60  * write it to the disk. This is an artifact from the old C-generating backend
  61  * and even there NOT needed. So we might change it in the future.
  62  */
  63 typedef struct be_gas_decl_env {
  64         be_gas_section_t     section;
  65         const be_main_env_t *main_env;
  66 } be_gas_decl_env_t;
  67
  68 static void emit_section_macho(be_gas_section_t section)
  69 {
  70         be_gas_section_t  base  = section & GAS_SECTION_TYPE_MASK;
  71         be_gas_section_t  flags = section & ~GAS_SECTION_TYPE_MASK;
  72         const char       *name;
  73
  74         if (current_section == section)
  75                 return;
  76         current_section = section;
  77
  78         /* shortforms */
  79         if (flags == 0) {
  80                 switch (base) {
  81                 case GAS_SECTION_TEXT:            name = "text";          break;
  82                 case GAS_SECTION_DATA:            name = "data";          break;
  83                 case GAS_SECTION_RODATA:          name = "const";         break;
  84                 case GAS_SECTION_BSS:             name = "data";          break;
  85                 case GAS_SECTION_CONSTRUCTORS:    name = "mod_init_func"; break;
  86                 case GAS_SECTION_DESTRUCTORS:     name = "mod_term_func"; break;
  87                 case GAS_SECTION_PIC_TRAMPOLINES: name = "section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5"; break;
  88                 case GAS_SECTION_PIC_SYMBOLS:     name = "section\t__IMPORT,__pointers,non_lazy_symbol_pointers"; break;
  89                 case GAS_SECTION_CSTRING:         name = "cstring";       break;
  90                 case GAS_SECTION_DEBUG_INFO:      name = "section __DWARF,__debug_info,regular,debug"; break;
  91                 case GAS_SECTION_DEBUG_ABBREV:    name = "section __DWARF,__debug_abbrev,regular,debug"; break;
  92                 case GAS_SECTION_DEBUG_LINE:      name = "section __DWARF,__debug_line,regular,debug"; break;
  93                 case GAS_SECTION_DEBUG_PUBNAMES:  name = "section __DWARF,__debug_pubnames,regular,debug"; break;
  94                 case GAS_SECTION_DEBUG_FRAME:     name = "section __DWARF,__debug_frame,regular,debug"; break;
  95                 default: panic("unsupported scetion type 0x%X", section);
  96                 }
  97                 be_emit_irprintf("\t.%s\n", name);
  98                 be_emit_write_line();
  99         } else if (flags & GAS_SECTION_FLAG_COMDAT) {
 100                 switch (base) {
 101                 case GAS_SECTION_TEXT:            name = "section __TEXT,__textcoal_nt,coalesced,pure_instructions"; break;
 102                 case GAS_SECTION_BSS:
 103                 case GAS_SECTION_DATA:            name = "section __DATA,__datacoal_nt,coalesced"; break;
 104                 case GAS_SECTION_RODATA:          name = "section __TEXT,__const_coal,coalesced"; break;
 105                 case GAS_SECTION_CSTRING:         name = "section __TEXT,__const_coal,coalesced"; break;
 106                 default: panic("unsupported scetion type 0x%X", section);
 107                 }
 108         } else if (flags & GAS_SECTION_FLAG_TLS) {
 109                 panic("thread local storage not supported on macho (section 0x%X)", section);
 110         } else {
 111                 panic("unsupported section type 0x%X", section);
 112         }
 113 }
 114
 115 static void emit_section_sparc(be_gas_section_t section, const ir_entity *entity)
 116 {
 117         be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
 118         be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
 119         static const char *const basename[GAS_SECTION_LAST+1] = {
 120                 "text",
 121                 "data",
 122                 "rodata",
 123                 "bss",
 124                 "ctors",
 125                 "dtors",
 126                 NULL, /* cstring */
 127                 NULL, /* pic trampolines */
 128                 NULL, /* pic symbols */
 129                 "debug_info",
 130                 "debug_abbrev",
 131                 "debug_line",
 132                 "debug_pubnames"
 133                 "debug_frame",
 134         };
 135
 136         if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
 137                 return;
 138         current_section = section;
 139
 140         be_emit_cstring("\t.section\t\".");
 141
 142         /* Part1: section-name */
 143         if (flags & GAS_SECTION_FLAG_TLS)
 144                 be_emit_char('t');
 145         assert(base < (be_gas_section_t)ARRAY_SIZE(basename));
 146         be_emit_string(basename[base]);
 147
 148         if (flags & GAS_SECTION_FLAG_COMDAT) {
 149                 be_emit_char('.');
 150                 be_gas_emit_entity(entity);
 151         }
 152         be_emit_char('"');
 153
 154         /* for the simple sections we're done here */
 155         if (flags == 0)
 156                 goto end;
 157
 158         be_emit_cstring(",#alloc");
 159
 160         switch (base) {
 161         case GAS_SECTION_TEXT: be_emit_cstring(",#execinstr"); break;
 162         case GAS_SECTION_DATA:
 163         case GAS_SECTION_BSS:  be_emit_cstring(",#write"); break;
 164         default:
 165                 /* nothing */
 166                 break;
 167         }
 168         if (flags & GAS_SECTION_FLAG_TLS) {
 169                 be_emit_cstring(",#tls");
 170         }
 171
 172 end:
 173         be_emit_char('\n');
 174         be_emit_write_line();
 175 }
 176
 177 static void emit_section(be_gas_section_t section, const ir_entity *entity)
 178 {
 179         be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
 180         be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
 181         const char *f;
 182         static const struct {
 183                 const char *name;
 184                 const char *type;
 185                 const char *flags;
 186         } sectioninfos[GAS_SECTION_LAST+1] = {
 187                 { "text",           "progbits", "ax" },
 188                 { "data",           "progbits", "aw" },
 189                 { "rodata",         "progbits", "a"  },
 190                 { "bss",            "nobits",   "aw" },
 191                 { "ctors",          "progbits", "aw" },
 192                 { "dtors",          "progbits", "aw" },
 193                 { NULL,             NULL,       NULL }, /* cstring */
 194                 { NULL,             NULL,       NULL }, /* pic trampolines */
 195                 { NULL,             NULL,       NULL }, /* pic symbols */
 196                 { "debug_info",     "progbits", ""   },
 197                 { "debug_abbrev",   "progbits", ""   },
 198                 { "debug_line",     "progbits", ""   },
 199                 { "debug_pubnames", "progbits", ""   },
 200                 { "debug_frame",    "progbits", ""   },
 201         };
 202
 203         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 204                 emit_section_macho(section);
 205                 return;
 206         } else if(be_gas_elf_variant == ELF_VARIANT_SPARC) {
 207                 emit_section_sparc(section, entity);
 208                 return;
 209         }
 210
 211         if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
 212                 return;
 213         current_section = section;
 214
 215         /* shortforms */
 216         if (flags == 0) {
 217                 switch (base) {
 218                 case GAS_SECTION_TEXT:
 219                         be_emit_cstring("\t.text\n");
 220                         be_emit_write_line();
 221                         return;
 222                 case GAS_SECTION_DATA:
 223                         be_emit_cstring("\t.data\n");
 224                         be_emit_write_line();
 225                         return;
 226                 case GAS_SECTION_RODATA:
 227                         be_emit_cstring("\t.section\t.rodata\n");
 228                         be_emit_write_line();
 229                         return;
 230                 case GAS_SECTION_BSS:
 231                         be_emit_cstring("\t.bss\n");
 232                         be_emit_write_line();
 233                         return;
 234                 default:
 235                         break;
 236                 }
 237         }
 238
 239         assert(base < (be_gas_section_t) ARRAY_SIZE(sectioninfos));
 240         be_emit_cstring("\t.section\t.");
 241         /* section name */
 242         if (flags & GAS_SECTION_FLAG_TLS)
 243                 be_emit_char('t');
 244         be_emit_string(sectioninfos[base].name);
 245         if (flags & GAS_SECTION_FLAG_COMDAT) {
 246                 be_emit_char('.');
 247                 be_gas_emit_entity(entity);
 248         }
 249
 250         /* section flags */
 251         be_emit_cstring(",\"");
 252         for (f = sectioninfos[base].flags; *f != '\0'; ++f) {
 253                 be_emit_char(*f);
 254         }
 255         if (flags & GAS_SECTION_FLAG_TLS)
 256                 be_emit_char('T');
 257         if (flags & GAS_SECTION_FLAG_COMDAT)
 258                 be_emit_char('G');
 259
 260         /* section type */
 261         if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) {
 262                 be_emit_cstring("\",");
 263                 be_emit_char(be_gas_elf_type_char);
 264                 be_emit_string(sectioninfos[base].type);
 265         }
 266
 267         if (flags & GAS_SECTION_FLAG_COMDAT) {
 268                 be_emit_char(',');
 269                 be_gas_emit_entity(entity);
 270                 be_emit_cstring(",comdat");
 271         }
 272         be_emit_char('\n');
 273         be_emit_write_line();
 274 }
 275
 276
 277
 278 void be_gas_emit_switch_section(be_gas_section_t section)
 279 {
 280         /* you have to produce a switch_section call with entity manually
 281          * for comdat sections */
 282         assert( !(section & GAS_SECTION_FLAG_COMDAT));
 283
 284         emit_section(section, NULL);
 285 }
 286
 287 static ir_tarval *get_initializer_tarval(const ir_initializer_t *initializer)
 288 {
 289         if (initializer->kind == IR_INITIALIZER_TARVAL)
 290                 return initializer->tarval.value;
 291         if (initializer->kind == IR_INITIALIZER_CONST) {
 292                 ir_node *node = initializer->consti.value;
 293                 if (is_Const(node)) {
 294                         return get_Const_tarval(node);
 295                 }
 296         }
 297         return get_tarval_undefined();
 298 }
 299
 300 static bool initializer_is_string_const(const ir_initializer_t *initializer)
 301 {
 302         size_t i, len;
 303         bool found_printable = false;
 304
 305         if (initializer->kind != IR_INITIALIZER_COMPOUND)
 306                 return false;
 307
 308         len = initializer->compound.n_initializers;
 309         if (len < 1)
 310                 return false;
 311         for (i = 0; i < len; ++i) {
 312                 int               c;
 313                 ir_tarval        *tv;
 314                 ir_mode          *mode;
 315                 ir_initializer_t *sub_initializer
 316                         = initializer->compound.initializers[i];
 317
 318                 tv = get_initializer_tarval(sub_initializer);
 319                 if (!tarval_is_constant(tv))
 320                         return false;
 321
 322                 mode = get_tarval_mode(tv);
 323                 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
 324                         return false;
 325
 326                 c = get_tarval_long(tv);
 327                 if (isgraph(c) || isspace(c))
 328                         found_printable = true;
 329                 else if (c != 0)
 330                         return false;
 331
 332                 if (i == len - 1 && c != '\0')
 333                         return false;
 334         }
 335
 336         return found_printable;
 337 }
 338
 339 static bool initializer_is_null(const ir_initializer_t *initializer)
 340 {
 341         switch (initializer->kind) {
 342         case IR_INITIALIZER_NULL:
 343                 return true;
 344         case IR_INITIALIZER_TARVAL: {
 345                 ir_tarval *tv = initializer->tarval.value;
 346                 return tarval_is_null(tv);
 347         }
 348         case IR_INITIALIZER_CONST: {
 349                 ir_node *value = initializer->consti.value;
 350                 if (!is_Const(value))
 351                         return false;
 352                 return is_Const_null(value);
 353         }
 354         case IR_INITIALIZER_COMPOUND: {
 355                 size_t i;
 356                 for (i = 0; i < initializer->compound.n_initializers; ++i) {
 357                         ir_initializer_t *subinitializer
 358                                 = initializer->compound.initializers[i];
 359                         if (!initializer_is_null(subinitializer))
 360                                 return false;
 361                 }
 362                 return true;
 363         }
 364         }
 365         panic("invalid initializer in initializer_is_null");
 366 }
 367
 368 /**
 369  * Determine if an entity is a string constant
 370  * @param ent The entity
 371  * @return 1 if it is a string constant, 0 otherwise
 372  */
 373 static int entity_is_string_const(const ir_entity *ent)
 374 {
 375         ir_type *type, *element_type;
 376         ir_mode *mode;
 377         int i, c, n;
 378
 379         type = get_entity_type(ent);
 380
 381         /* if it's an array */
 382         if (!is_Array_type(type))
 383                 return 0;
 384
 385         element_type = get_array_element_type(type);
 386
 387         /* and the array's element type is primitive */
 388         if (!is_Primitive_type(element_type))
 389                 return 0;
 390
 391         /* and the mode of the element type is an int of
 392          * the same size as the byte mode */
 393         mode = get_type_mode(element_type);
 394         if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
 395                 return 0;
 396
 397         if (ent->initializer != NULL) {
 398                 return initializer_is_string_const(ent->initializer);
 399         } else if (entity_has_compound_ent_values(ent)) {
 400                 int found_printable = 0;
 401                 /* if it contains only printable chars and a 0 at the end */
 402                 n = get_compound_ent_n_values(ent);
 403                 for (i = 0; i < n; ++i) {
 404                         ir_node *irn = get_compound_ent_value(ent, i);
 405                         if (! is_Const(irn))
 406                                 return 0;
 407
 408                         c = (int) get_tarval_long(get_Const_tarval(irn));
 409
 410                         if (isgraph(c) || isspace(c))
 411                                 found_printable = 1;
 412                         else if (c != 0)
 413                                 return 0;
 414
 415                         if (i == n - 1 && c != '\0')
 416                                 return 0;
 417                 }
 418                 return found_printable;
 419         }
 420
 421         return 0;
 422 }
 423
 424 static bool entity_is_null(const ir_entity *entity)
 425 {
 426         ir_initializer_t *initializer = get_entity_initializer(entity);
 427         return initializer == NULL || initializer_is_null(initializer);
 428 }
 429
 430 static bool is_comdat(const ir_entity *entity)
 431 {
 432         ir_linkage linkage = get_entity_linkage(entity);
 433         return (linkage & IR_LINKAGE_MERGE)
 434                 && (linkage & IR_LINKAGE_GARBAGE_COLLECT);
 435 }
 436
 437 static be_gas_section_t determine_basic_section(const ir_entity *entity)
 438 {
 439         ir_linkage linkage;
 440
 441         if (is_method_entity(entity))
 442                 return GAS_SECTION_TEXT;
 443
 444         linkage = get_entity_linkage(entity);
 445         if (linkage & IR_LINKAGE_CONSTANT) {
 446                 /* mach-o is the only one with a cstring section */
 447                 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
 448                     && entity_is_string_const(entity))
 449                         return GAS_SECTION_CSTRING;
 450
 451                 return GAS_SECTION_RODATA;
 452         }
 453         if (entity_is_null(entity))
 454                 return GAS_SECTION_BSS;
 455
 456         return GAS_SECTION_DATA;
 457 }
 458
 459 static be_gas_section_t determine_section(be_gas_decl_env_t *env,
 460                                           const ir_entity *entity)
 461 {
 462         ir_type *owner = get_entity_owner(entity);
 463
 464         if (owner == get_segment_type(IR_SEGMENT_GLOBAL)) {
 465                 be_gas_section_t section = determine_basic_section(entity);
 466                 if (is_comdat(entity))
 467                         section |= GAS_SECTION_FLAG_COMDAT;
 468                 return section;
 469         } else if (env != NULL && owner == env->main_env->pic_symbols_type) {
 470                 return GAS_SECTION_PIC_SYMBOLS;
 471         } else if (env != NULL && owner == env->main_env->pic_trampolines_type) {
 472                 return GAS_SECTION_PIC_TRAMPOLINES;
 473         } else if (owner == get_segment_type(IR_SEGMENT_CONSTRUCTORS)) {
 474                 return GAS_SECTION_CONSTRUCTORS;
 475         } else if (owner == get_segment_type(IR_SEGMENT_DESTRUCTORS)) {
 476                 return GAS_SECTION_DESTRUCTORS;
 477         } else if (owner == get_segment_type(IR_SEGMENT_THREAD_LOCAL)) {
 478                 be_gas_section_t section = determine_basic_section(entity);
 479                 if (is_comdat(entity))
 480                         section |= GAS_SECTION_FLAG_COMDAT;
 481
 482                 return section | GAS_SECTION_FLAG_TLS;
 483         }
 484
 485         /* the java frontend keeps some functions inside classes */
 486         if (is_Class_type(owner)) {
 487                 return determine_basic_section(entity);
 488         }
 489
 490         panic("Couldn't determine section for %+F?!?", entity);
 491 }
 492
 493 static void emit_weak(const ir_entity *entity)
 494 {
 495         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 496                 be_emit_cstring("\t.weak_reference ");
 497         } else {
 498                 be_emit_cstring("\t.weak ");
 499         }
 500         be_gas_emit_entity(entity);
 501         be_emit_char('\n');
 502         be_emit_write_line();
 503 }
 504
 505 static void emit_visibility(const ir_entity *entity)
 506 {
 507         ir_linkage const linkage = get_entity_linkage(entity);
 508
 509         if (linkage & IR_LINKAGE_WEAK) {
 510                 emit_weak(entity);
 511                 /* Note: .weak seems to imply .globl so no need to output .globl */
 512         } else if (get_entity_visibility(entity) == ir_visibility_external
 513                    && entity_has_definition(entity)) {
 514                 be_emit_cstring("\t.globl ");
 515                 be_gas_emit_entity(entity);
 516                 be_emit_char('\n');
 517                 be_emit_write_line();
 518         }
 519
 520         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
 521                         && (linkage & IR_LINKAGE_HIDDEN_USER)
 522                         && get_entity_ld_name(entity)[0] != '\0') {
 523                 be_emit_cstring("\t.no_dead_strip ");
 524                 be_gas_emit_entity(entity);
 525                 be_emit_char('\n');
 526                 be_emit_write_line();
 527         }
 528 }
 529
 530 void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment, const parameter_dbg_info_t *parameter_infos)
 531 {
 532         be_gas_section_t section;
 533
 534         be_dwarf_method_before(entity, parameter_infos);
 535
 536         section = determine_section(NULL, entity);
 537         emit_section(section, entity);
 538
 539         /* write the begin line (makes the life easier for scripts parsing the
 540          * assembler) */
 541         if (be_options.verbose_asm) {
 542                 be_emit_cstring("# -- Begin  ");
 543                 be_gas_emit_entity(entity);
 544                 be_emit_char('\n');
 545                 be_emit_write_line();
 546         }
 547
 548         if (po2alignment > 0) {
 549                 const char *fill_byte = "";
 550                 unsigned    maximum_skip = (1 << po2alignment) - 1;
 551                 /* gcc fills space between function with 0x90... */
 552                 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 553                         fill_byte = "0x90";
 554                 }
 555                 be_emit_cstring("\t.p2align ");
 556                 be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip);
 557                 be_emit_write_line();
 558         }
 559         emit_visibility(entity);
 560
 561         switch (be_gas_object_file_format) {
 562         case OBJECT_FILE_FORMAT_ELF:
 563                 be_emit_cstring("\t.type\t");
 564                 be_gas_emit_entity(entity);
 565                 be_emit_cstring(", ");
 566                 be_emit_char(be_gas_elf_type_char);
 567                 be_emit_cstring("function\n");
 568                 be_emit_write_line();
 569                 break;
 570         case OBJECT_FILE_FORMAT_COFF:
 571                 be_emit_cstring("\t.def\t");
 572                 be_gas_emit_entity(entity);
 573                 be_emit_cstring(";");
 574                 if (get_entity_visibility(entity) == ir_visibility_local) {
 575                         be_emit_cstring("\t.scl\t3;");
 576                 } else {
 577                         be_emit_cstring("\t.scl\t2;");
 578                 }
 579                 be_emit_cstring("\t.type\t32;\t.endef\n");
 580                 be_emit_write_line();
 581                 break;
 582         case OBJECT_FILE_FORMAT_MACH_O:
 583                 break;
 584         }
 585         be_gas_emit_entity(entity);
 586         be_emit_cstring(":\n");
 587         be_emit_write_line();
 588
 589         be_dwarf_method_begin();
 590 }
 591
 592 void be_gas_emit_function_epilog(const ir_entity *entity)
 593 {
 594         be_dwarf_method_end();
 595
 596         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF) {
 597                 be_emit_cstring("\t.size\t");
 598                 be_gas_emit_entity(entity);
 599                 be_emit_cstring(", .-");
 600                 be_gas_emit_entity(entity);
 601                 be_emit_char('\n');
 602                 be_emit_write_line();
 603         }
 604
 605         if (be_options.verbose_asm) {
 606                 be_emit_cstring("# -- End  ");
 607                 be_gas_emit_entity(entity);
 608                 be_emit_char('\n');
 609                 be_emit_write_line();
 610         }
 611
 612         be_emit_char('\n');
 613         be_emit_write_line();
 614 }
 615
 616 /**
 617  * Output a tarval.
 618  *
 619  * @param tv     the tarval
 620  * @param bytes  the width of the tarvals value in bytes
 621  */
 622 static void emit_arith_tarval(ir_tarval *tv, unsigned bytes)
 623 {
 624         switch (bytes) {
 625         case 1:
 626                 be_emit_irprintf("0x%02x", get_tarval_sub_bits(tv, 0));
 627                 return;
 628
 629         case 2:
 630                 be_emit_irprintf("0x%02x%02x",
 631                         get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 632                 return;
 633
 634         case 4:
 635                 be_emit_irprintf("0x%02x%02x%02x%02x",
 636                         get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
 637                         get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 638                 return;
 639
 640         case 8:
 641                 be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x",
 642                         get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
 643                         get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
 644                         get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
 645                         get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 646                 return;
 647         }
 648
 649         panic("Can't dump a tarval with %d bytes", bytes);
 650 }
 651
 652 /**
 653  * Return the label prefix for labeled instructions.
 654  */
 655 const char *be_gas_insn_label_prefix(void)
 656 {
 657         return ".LE";
 658 }
 659
 660 /**
 661  * Return the tarval of an atomic initializer.
 662  *
 663  * @param init  a node representing the initializer (on the const code irg)
 664  *
 665  * @return the tarval
 666  */
 667 static ir_tarval *get_atomic_init_tv(ir_node *init)
 668 {
 669         for (;;) {
 670                 ir_mode *mode = get_irn_mode(init);
 671
 672                 switch (get_irn_opcode(init)) {
 673
 674                 case iro_Cast:
 675                         init = get_Cast_op(init);
 676                         continue;
 677
 678                 case iro_Conv:
 679                         init = get_Conv_op(init);
 680                         continue;
 681
 682                 case iro_Const:
 683                         return get_Const_tarval(init);
 684
 685                 case iro_SymConst:
 686                         switch (get_SymConst_kind(init)) {
 687                         case symconst_type_size:
 688                                 return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode);
 689
 690                         case symconst_type_align:
 691                                 return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
 692
 693                         case symconst_ofs_ent:
 694                                 return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
 695
 696                         case symconst_enum_const:
 697                                 return get_enumeration_value(get_SymConst_enum(init));
 698
 699                         default:
 700                                 return NULL;
 701                         }
 702
 703                 default:
 704                         return NULL;
 705                 }
 706         }
 707 }
 708
 709 /**
 710  * Dump an atomic value.
 711  *
 712  * @param env   the gas output environment
 713  * @param init  a node representing the atomic value (on the const code irg)
 714  */
 715 static void emit_init_expression(be_gas_decl_env_t *env, ir_node *init)
 716 {
 717         ir_mode *mode = get_irn_mode(init);
 718         int bytes     = get_mode_size_bytes(mode);
 719         ir_tarval *tv;
 720         ir_entity *ent;
 721
 722         init = skip_Id(init);
 723
 724         switch (get_irn_opcode(init)) {
 725         case iro_Cast:
 726                 emit_init_expression(env, get_Cast_op(init));
 727                 return;
 728
 729         case iro_Conv:
 730                 emit_init_expression(env, get_Conv_op(init));
 731                 return;
 732
 733         case iro_Const:
 734                 tv = get_Const_tarval(init);
 735
 736                 /* it's an arithmetic value */
 737                 emit_arith_tarval(tv, bytes);
 738                 return;
 739
 740         case iro_SymConst:
 741                 switch (get_SymConst_kind(init)) {
 742                 case symconst_addr_ent:
 743                         ent = get_SymConst_entity(init);
 744                         be_gas_emit_entity(ent);
 745                         break;
 746
 747                 case symconst_ofs_ent:
 748                         ent = get_SymConst_entity(init);
 749                         be_emit_irprintf("%d", get_entity_offset(ent));
 750                         break;
 751
 752                 case symconst_type_size:
 753                         be_emit_irprintf("%u", get_type_size_bytes(get_SymConst_type(init)));
 754                         break;
 755
 756                 case symconst_type_align:
 757                         be_emit_irprintf("%u", get_type_alignment_bytes(get_SymConst_type(init)));
 758                         break;
 759
 760                 case symconst_enum_const:
 761                         tv = get_enumeration_value(get_SymConst_enum(init));
 762                         emit_arith_tarval(tv, bytes);
 763                         break;
 764
 765                 default:
 766                         assert(!"emit_atomic_init(): don't know how to init from this SymConst");
 767                 }
 768                 return;
 769
 770         case iro_Add:
 771                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 772                         panic("Constant must be int or pointer for '+' to work");
 773                 }
 774                 emit_init_expression(env, get_Add_left(init));
 775                 be_emit_cstring(" + ");
 776                 emit_init_expression(env, get_Add_right(init));
 777                 return;
 778
 779         case iro_Sub:
 780                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 781                         panic("Constant must be int or pointer for '-' to work");
 782                 }
 783                 emit_init_expression(env, get_Sub_left(init));
 784                 be_emit_cstring(" - ");
 785                 emit_init_expression(env, get_Sub_right(init));
 786                 return;
 787
 788         case iro_Mul:
 789                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 790                         panic("Constant must be int or pointer for '*' to work");
 791                 }
 792                 emit_init_expression(env, get_Mul_left(init));
 793                 be_emit_cstring(" * ");
 794                 emit_init_expression(env, get_Mul_right(init));
 795                 return;
 796
 797         case iro_Unknown:
 798                 be_emit_cstring("0");
 799                 return;
 800
 801         default:
 802                 panic("emit_atomic_init(): unsupported IR-node %+F", init);
 803         }
 804 }
 805
 806 /**
 807  * Dumps the type for given size (.byte, .long, ...)
 808  *
 809  * @param size  the size in bytes
 810  */
 811 static void emit_size_type(size_t size)
 812 {
 813         switch (size) {
 814         case 1: be_emit_cstring("\t.byte\t");  break;
 815         case 2: be_emit_cstring("\t.short\t"); break;
 816         case 4: be_emit_cstring("\t.long\t");  break;
 817         case 8: be_emit_cstring("\t.quad\t");  break;
 818
 819         default:
 820                 panic("Try to dump a type with %u bytes", (unsigned)size);
 821         }
 822 }
 823
 824 /**
 825  * Dump a string constant.
 826  * No checks are made!!
 827  *
 828  * @param ent  The entity to dump.
 829  */
 830 static void emit_string_cst(const ir_entity *ent)
 831 {
 832         int      i, len;
 833         int      output_len;
 834         ir_type *type;
 835         int      type_size;
 836         int      remaining_space;
 837
 838         len        = get_compound_ent_n_values(ent);
 839         output_len = len;
 840         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 841                 be_emit_cstring("\t.ascii \"");
 842         } else {
 843                 be_emit_cstring("\t.string \"");
 844                 output_len -= 1;
 845         }
 846
 847         for (i = 0; i < output_len; ++i) {
 848                 ir_node *irn;
 849                 int c;
 850
 851                 irn = get_compound_ent_value(ent, i);
 852                 c = (int) get_tarval_long(get_Const_tarval(irn));
 853
 854                 switch (c) {
 855                 case '"' : be_emit_cstring("\\\""); break;
 856                 case '\n': be_emit_cstring("\\n"); break;
 857                 case '\r': be_emit_cstring("\\r"); break;
 858                 case '\t': be_emit_cstring("\\t"); break;
 859                 case '\\': be_emit_cstring("\\\\"); break;
 860                 default  :
 861                         if (isprint(c))
 862                                 be_emit_char(c);
 863                         else
 864                                 be_emit_irprintf("\\%03o", c);
 865                         break;
 866                 }
 867         }
 868         be_emit_cstring("\"\n");
 869         be_emit_write_line();
 870
 871         type            = get_entity_type(ent);
 872         type_size       = get_type_size_bytes(type);
 873         remaining_space = type_size - len;
 874         assert(remaining_space >= 0);
 875         if (remaining_space > 0) {
 876                 be_emit_irprintf("\t.space\t%d, 0\n", remaining_space);
 877         }
 878 }
 879
 880 static size_t emit_string_initializer(const ir_initializer_t *initializer)
 881 {
 882         size_t i, len;
 883
 884         len = initializer->compound.n_initializers;
 885         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 886                 be_emit_cstring("\t.ascii \"");
 887         } else {
 888                 be_emit_cstring("\t.string \"");
 889                 len -= 1;
 890         }
 891
 892         for (i = 0; i < len; ++i) {
 893                 const ir_initializer_t *sub_initializer
 894                         = get_initializer_compound_value(initializer, i);
 895
 896                 ir_tarval *tv = get_initializer_tarval(sub_initializer);
 897                 int        c  = get_tarval_long(tv);
 898
 899                 switch (c) {
 900                 case '"' : be_emit_cstring("\\\""); break;
 901                 case '\n': be_emit_cstring("\\n"); break;
 902                 case '\r': be_emit_cstring("\\r"); break;
 903                 case '\t': be_emit_cstring("\\t"); break;
 904                 case '\\': be_emit_cstring("\\\\"); break;
 905                 default  :
 906                         if (isprint(c))
 907                                 be_emit_char(c);
 908                         else
 909                                 be_emit_irprintf("\\%03o", c);
 910                         break;
 911                 }
 912         }
 913         be_emit_cstring("\"\n");
 914         be_emit_write_line();
 915
 916         return initializer->compound.n_initializers;
 917 }
 918
 919 typedef enum normal_or_bitfield_kind {
 920         NORMAL = 0,
 921         TARVAL,
 922         STRING,
 923         BITFIELD
 924 } normal_or_bitfield_kind;
 925
 926 typedef struct {
 927         normal_or_bitfield_kind kind;
 928         ir_type                *type;
 929         union {
 930                 ir_node                *value;
 931                 ir_tarval              *tarval;
 932                 unsigned char           bf_val;
 933                 const ir_initializer_t *string;
 934         } v;
 935 } normal_or_bitfield;
 936
 937 static size_t get_initializer_size(const ir_initializer_t *initializer,
 938                                    ir_type *type)
 939 {
 940         switch (get_initializer_kind(initializer)) {
 941         case IR_INITIALIZER_TARVAL:
 942                 assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type));
 943                 return get_type_size_bytes(type);
 944         case IR_INITIALIZER_CONST:
 945         case IR_INITIALIZER_NULL:
 946                 return get_type_size_bytes(type);
 947         case IR_INITIALIZER_COMPOUND:
 948                 if (is_Array_type(type)) {
 949                         if (is_array_variable_size(type)) {
 950                                 ir_type   *element_type = get_array_element_type(type);
 951                                 unsigned   element_size = get_type_size_bytes(element_type);
 952                                 unsigned   element_align
 953                                         = get_type_alignment_bytes(element_type);
 954                                 unsigned   misalign     = element_size % element_align;
 955                                 size_t     n_inits
 956                                         = get_initializer_compound_n_entries(initializer);
 957                                 element_size += element_align - misalign;
 958                                 return n_inits * element_size;
 959                         } else {
 960                                 return get_type_size_bytes(type);
 961                         }
 962                 } else {
 963                         assert(is_compound_type(type));
 964                         size_t size = get_type_size_bytes(type);
 965                         if (is_compound_variable_size(type)) {
 966                                 /* last initializer has to be an array of variable size */
 967                                 size_t l = get_initializer_compound_n_entries(initializer)-1;
 968                                 const ir_initializer_t *last
 969                                         = get_initializer_compound_value(initializer, l);
 970                                 const ir_entity *last_ent  = get_compound_member(type, l);
 971                                 ir_type         *last_type = get_entity_type(last_ent);
 972                                 assert(is_array_variable_size(last_type));
 973                                 size += get_initializer_size(last, last_type);
 974                         }
 975                         return size;
 976                 }
 977         }
 978
 979         panic("found invalid initializer");
 980 }
 981
 982 #ifndef NDEBUG
 983 static normal_or_bitfield *glob_vals;
 984 static size_t              max_vals;
 985 #endif
 986
 987 static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits,
 988                           const ir_initializer_t *initializer, ir_type *type)
 989 {
 990         static const size_t BITS_PER_BYTE = 8;
 991         ir_mode   *mode      = get_type_mode(type);
 992         ir_tarval *tv        = NULL;
 993         int        value_len;
 994         size_t     bit_offset;
 995         size_t     end;
 996         bool       big_endian = be_get_backend_param()->byte_order_big_endian;
 997
 998         switch (get_initializer_kind(initializer)) {
 999         case IR_INITIALIZER_NULL:
1000                 return;
1001         case IR_INITIALIZER_TARVAL:
1002                 tv = get_initializer_tarval_value(initializer);
1003                 break;
1004         case IR_INITIALIZER_CONST: {
1005                 ir_node *node = get_initializer_const_value(initializer);
1006                 if (!is_Const(node)) {
1007                         panic("bitfield initializer not a Const node");
1008                 }
1009                 tv = get_Const_tarval(node);
1010                 break;
1011         }
1012         case IR_INITIALIZER_COMPOUND:
1013                 panic("bitfield initializer is compound");
1014         }
1015         if (tv == NULL) {
1016                 panic("Couldn't get numeric value for bitfield initializer");
1017         }
1018         tv = tarval_convert_to(tv, get_type_mode(type));
1019
1020         value_len  = get_type_size_bytes(get_primitive_base_type(type));
1021         bit_offset = 0;
1022         end        = get_mode_size_bits(mode);
1023         while (bit_offset < end) {
1024                 size_t        src_offset      = bit_offset / BITS_PER_BYTE;
1025                 size_t        src_offset_bits = bit_offset % BITS_PER_BYTE;
1026                 size_t        dst_offset      = (bit_offset+offset_bits) / BITS_PER_BYTE;
1027                 size_t        dst_offset_bits = (bit_offset+offset_bits) % BITS_PER_BYTE;
1028                 size_t        src_bits_len    = end-bit_offset;
1029                 size_t        dst_bits_len    = BITS_PER_BYTE-dst_offset_bits;
1030                 unsigned char curr_bits;
1031                 normal_or_bitfield *val;
1032                 if (src_bits_len > dst_bits_len)
1033                         src_bits_len = dst_bits_len;
1034
1035                 if (big_endian) {
1036                         val = &vals[value_len - dst_offset - 1];
1037                 } else {
1038                         val = &vals[dst_offset];
1039                 }
1040
1041                 assert((val-glob_vals) < (ptrdiff_t) max_vals);
1042                 assert(val->kind == BITFIELD ||
1043                                 (val->kind == NORMAL && val->v.value == NULL));
1044                 val->kind  = BITFIELD;
1045                 curr_bits  = get_tarval_sub_bits(tv, src_offset);
1046                 curr_bits  = curr_bits >> src_offset_bits;
1047                 if (src_offset_bits + src_bits_len > 8) {
1048                         unsigned next_bits = get_tarval_sub_bits(tv, src_offset+1);
1049                         curr_bits |= next_bits << (8 - src_offset_bits);
1050                 }
1051                 curr_bits &= (1 << src_bits_len) - 1;
1052                 val->v.bf_val |= curr_bits << dst_offset_bits;
1053
1054                 bit_offset += dst_bits_len;
1055         }
1056 }
1057
1058 static void emit_ir_initializer(normal_or_bitfield *vals,
1059                                 const ir_initializer_t *initializer,
1060                                 ir_type *type)
1061 {
1062         assert((size_t) (vals - glob_vals) < max_vals);
1063
1064         if (initializer_is_string_const(initializer)) {
1065                 assert(vals->kind != BITFIELD);
1066                 vals->kind     = STRING;
1067                 vals->v.string = initializer;
1068                 return;
1069         }
1070
1071         switch (get_initializer_kind(initializer)) {
1072         case IR_INITIALIZER_NULL:
1073                 return;
1074         case IR_INITIALIZER_TARVAL: {
1075                 size_t i;
1076
1077                 assert(vals->kind != BITFIELD);
1078                 vals->kind     = TARVAL;
1079                 vals->type     = type;
1080                 vals->v.tarval = get_initializer_tarval_value(initializer);
1081                 assert(get_type_mode(type) == get_tarval_mode(vals->v.tarval));
1082                 for (i = 1; i < get_type_size_bytes(type); ++i) {
1083                         vals[i].kind    = NORMAL;
1084                         vals[i].type    = NULL;
1085                         vals[i].v.value = NULL;
1086                 }
1087                 return;
1088         }
1089         case IR_INITIALIZER_CONST: {
1090                 size_t i;
1091
1092                 assert(vals->kind != BITFIELD);
1093                 vals->kind    = NORMAL;
1094                 vals->type    = type;
1095                 vals->v.value = get_initializer_const_value(initializer);
1096                 for (i = 1; i < get_type_size_bytes(type); ++i) {
1097                         vals[i].kind    = NORMAL;
1098                         vals[i].type    = NULL;
1099                         vals[i].v.value = NULL;
1100                 }
1101                 return;
1102         }
1103         case IR_INITIALIZER_COMPOUND: {
1104                 size_t i = 0;
1105                 size_t n = get_initializer_compound_n_entries(initializer);
1106
1107                 if (is_Array_type(type)) {
1108                         ir_type *element_type = get_array_element_type(type);
1109                         size_t   skip         = get_type_size_bytes(element_type);
1110                         size_t   alignment    = get_type_alignment_bytes(element_type);
1111                         size_t   misalign     = skip % alignment;
1112                         if (misalign != 0) {
1113                                 skip += alignment - misalign;
1114                         }
1115
1116                         for (i = 0; i < n; ++i) {
1117                                 ir_initializer_t *sub_initializer
1118                                         = get_initializer_compound_value(initializer, i);
1119
1120                                 emit_ir_initializer(vals, sub_initializer, element_type);
1121
1122                                 vals += skip;
1123                         }
1124                 } else {
1125                         size_t n_members, i;
1126                         assert(is_compound_type(type));
1127                         n_members = get_compound_n_members(type);
1128                         for (i = 0; i < n_members; ++i) {
1129                                 ir_entity        *member    = get_compound_member(type, i);
1130                                 size_t            offset    = get_entity_offset(member);
1131                                 ir_type          *subtype   = get_entity_type(member);
1132                                 ir_mode          *mode      = get_type_mode(subtype);
1133                                 ir_initializer_t *sub_initializer;
1134
1135                                 assert(i < get_initializer_compound_n_entries(initializer));
1136                                 sub_initializer
1137                                         = get_initializer_compound_value(initializer, i);
1138
1139                                 if (mode != NULL) {
1140                                         size_t offset_bits
1141                                                 = get_entity_offset_bits_remainder(member);
1142
1143                                         if (is_Primitive_type(subtype)
1144                                                         && get_primitive_base_type(subtype) != NULL) {
1145                                                 emit_bitfield(&vals[offset], offset_bits,
1146                                                               sub_initializer, subtype);
1147                                                 continue;
1148                                         } else {
1149                                                 assert(offset_bits == 0);
1150                                         }
1151                                 }
1152
1153                                 emit_ir_initializer(&vals[offset], sub_initializer, subtype);
1154                         }
1155                 }
1156
1157                 return;
1158         }
1159         }
1160         panic("invalid ir_initializer kind found");
1161 }
1162
1163 static void emit_tarval_data(ir_type *type, ir_tarval *tv)
1164 {
1165         size_t size = get_type_size_bytes(type);
1166         if (size == 12) {
1167                 /* this should be an x86 extended float */
1168                 assert(be_get_backend_param()->byte_order_big_endian == 0);
1169
1170                 /* Beware: Mixed endian output!  One little endian number emitted as
1171                  * three longs.  Each long initializer is written in big endian. */
1172                 be_emit_irprintf(
1173                         "\t.long\t0x%02x%02x%02x%02x\n"
1174                         "\t.long\t0x%02x%02x%02x%02x\n"
1175                         "\t.long\t0x%02x%02x%02x%02x\n",
1176                         get_tarval_sub_bits(tv,  3), get_tarval_sub_bits(tv,  2),
1177                         get_tarval_sub_bits(tv,  1), get_tarval_sub_bits(tv,  0),
1178                         get_tarval_sub_bits(tv,  7), get_tarval_sub_bits(tv,  6),
1179                         get_tarval_sub_bits(tv,  5), get_tarval_sub_bits(tv,  4),
1180                         get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1181                         get_tarval_sub_bits(tv,  9), get_tarval_sub_bits(tv,  8)
1182                 );
1183                 be_emit_write_line();
1184         } else if (size == 16) {
1185                 if (be_get_backend_param()->byte_order_big_endian) {
1186                         be_emit_irprintf(
1187                                 "\t.long\t0x%02x%02x%02x%02x\n"
1188                                 "\t.long\t0x%02x%02x%02x%02x\n"
1189                                 "\t.long\t0x%02x%02x%02x%02x\n"
1190                                 "\t.long\t0x%02x%02x%02x%02x\n",
1191                                 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
1192                                 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12),
1193                                 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1194                                 get_tarval_sub_bits(tv,  9), get_tarval_sub_bits(tv,  8),
1195                                 get_tarval_sub_bits(tv,  7), get_tarval_sub_bits(tv,  6),
1196                                 get_tarval_sub_bits(tv,  5), get_tarval_sub_bits(tv,  4),
1197                                 get_tarval_sub_bits(tv,  3), get_tarval_sub_bits(tv,  2),
1198                                 get_tarval_sub_bits(tv,  1), get_tarval_sub_bits(tv,  0)
1199                         );
1200                 } else {
1201                         /* Beware: Mixed endian output! One little endian number emitted as
1202                          * three longs.  Each long initializer is written in big endian. */
1203                         be_emit_irprintf(
1204                                 "\t.long\t0x%02x%02x%02x%02x\n"
1205                                 "\t.long\t0x%02x%02x%02x%02x\n"
1206                                 "\t.long\t0x%02x%02x%02x%02x\n"
1207                                 "\t.long\t0x%02x%02x%02x%02x\n",
1208                                 get_tarval_sub_bits(tv,  3), get_tarval_sub_bits(tv,  2),
1209                                 get_tarval_sub_bits(tv,  1), get_tarval_sub_bits(tv,  0),
1210                                 get_tarval_sub_bits(tv,  7), get_tarval_sub_bits(tv,  6),
1211                                 get_tarval_sub_bits(tv,  5), get_tarval_sub_bits(tv,  4),
1212                                 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1213                                 get_tarval_sub_bits(tv,  9), get_tarval_sub_bits(tv,  8),
1214                                 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
1215                                 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12)
1216                         );
1217                 }
1218                 be_emit_write_line();
1219                 return;
1220         } else {
1221                 /* default case */
1222                 emit_size_type(size);
1223                 emit_arith_tarval(tv, size);
1224                 be_emit_char('\n');
1225                 be_emit_write_line();
1226         }
1227 }
1228
1229 /**
1230  * Emit an atomic value.
1231  *
1232  * @param env   the gas output environment
1233  * @param init  a node representing the atomic value (on the const code irg)
1234  */
1235 static void emit_node_data(be_gas_decl_env_t *env, ir_node *init, ir_type *type)
1236 {
1237         size_t size = get_type_size_bytes(type);
1238         if (size == 12 || size == 16) {
1239                 ir_tarval *tv;
1240                 if (!is_Const(init)) {
1241                         panic("12/16byte initializers only support Const nodes yet");
1242                 }
1243                 tv = get_Const_tarval(init);
1244                 emit_tarval_data(type, tv);
1245                 return;
1246         }
1247
1248         emit_size_type(size);
1249         emit_init_expression(env, init);
1250         be_emit_char('\n');
1251         be_emit_write_line();
1252 }
1253
1254 static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity)
1255 {
1256         const ir_initializer_t *initializer = entity->initializer;
1257         ir_type                *type;
1258         normal_or_bitfield     *vals;
1259         size_t                  size;
1260         size_t                  k;
1261
1262         if (initializer_is_string_const(initializer)) {
1263                 emit_string_initializer(initializer);
1264                 return;
1265         }
1266
1267         type = get_entity_type(entity);
1268         size = get_initializer_size(initializer, type);
1269
1270         if (size == 0)
1271                 return;
1272
1273         /*
1274          * In the worst case, every initializer allocates one byte.
1275          * Moreover, initializer might be big, do not allocate on stack.
1276          */
1277         vals = XMALLOCNZ(normal_or_bitfield, size);
1278
1279 #ifndef NDEBUG
1280         glob_vals = vals;
1281         max_vals  = size;
1282 #endif
1283
1284         emit_ir_initializer(vals, initializer, type);
1285
1286         /* now write values sorted */
1287         for (k = 0; k < size; ) {
1288                 int                     space     = 0;
1289                 normal_or_bitfield_kind kind      = vals[k].kind;
1290                 int                     elem_size;
1291                 switch (kind) {
1292                 case NORMAL:
1293                         if (vals[k].v.value != NULL) {
1294                                 emit_node_data(env, vals[k].v.value, vals[k].type);
1295                                 elem_size = get_type_size_bytes(vals[k].type);
1296                         } else {
1297                                 elem_size = 0;
1298                         }
1299                         break;
1300                 case TARVAL:
1301                         emit_tarval_data(vals[k].type, vals[k].v.tarval);
1302                         elem_size = get_type_size_bytes(vals[k].type);
1303                         break;
1304                 case STRING:
1305                         elem_size = emit_string_initializer(vals[k].v.string);
1306                         break;
1307                 case BITFIELD:
1308                         be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1309                         be_emit_write_line();
1310                         elem_size = 1;
1311                         break;
1312                 default:
1313                         panic("internal compiler error (invalid normal_or_bitfield_kind");
1314                 }
1315
1316                 k += elem_size;
1317                 while (k < size && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1318                         ++space;
1319                         ++k;
1320                 }
1321
1322                 /* a gap */
1323                 if (space > 0) {
1324                         be_emit_irprintf("\t.space\t%d, 0\n", space);
1325                         be_emit_write_line();
1326                 }
1327         }
1328         xfree(vals);
1329 }
1330
1331 static void emit_compound_graph_init(be_gas_decl_env_t *env,
1332                                      const ir_entity *ent)
1333 {
1334         normal_or_bitfield *vals;
1335         int i, j, n;
1336         unsigned k, last_ofs;
1337
1338         if (entity_is_string_const(ent)) {
1339                 emit_string_cst(ent);
1340                 return;
1341         }
1342
1343         n = get_compound_ent_n_values(ent);
1344
1345         /* Find the initializer size. Sorrily gcc support a nasty feature:
1346            The last field of a compound may be a flexible array. This allows
1347            initializers bigger than the type size. */
1348         last_ofs = get_type_size_bytes(get_entity_type(ent));
1349         for (i = 0; i < n; ++i) {
1350                 unsigned offset         = get_compound_ent_value_offset_bytes(ent, i);
1351                 unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i);
1352                 ir_node  *value         = get_compound_ent_value(ent, i);
1353                 unsigned value_len      = get_mode_size_bits(get_irn_mode(value));
1354
1355                 offset += (value_len + bits_remainder + 7) >> 3;
1356
1357                 if (offset > last_ofs) {
1358                         last_ofs = offset;
1359                 }
1360         }
1361
1362         /*
1363          * In the worst case, every initializer allocates one byte.
1364          * Moreover, initializer might be big, do not allocate on stack.
1365          */
1366         vals = XMALLOCNZ(normal_or_bitfield, last_ofs);
1367
1368         /* collect the values and store them at the offsets */
1369         for (i = 0; i < n; ++i) {
1370                 unsigned offset      = get_compound_ent_value_offset_bytes(ent, i);
1371                 int      offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i);
1372                 ir_node  *value      = get_compound_ent_value(ent, i);
1373                 int      value_len   = get_mode_size_bits(get_irn_mode(value));
1374
1375                 assert(offset_bits >= 0);
1376
1377                 if (offset_bits != 0 ||
1378                                 (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
1379                         ir_tarval *tv = get_atomic_init_tv(value);
1380                         unsigned char curr_bits, last_bits = 0;
1381                         if (tv == NULL) {
1382                                 panic("Couldn't get numeric value for bitfield initializer '%s'",
1383                                                 get_entity_ld_name(ent));
1384                         }
1385                         /* normalize offset */
1386                         offset += offset_bits >> 3;
1387                         offset_bits &= 7;
1388
1389                         for (j = 0; value_len + offset_bits > 0; ++j) {
1390                                 assert(offset + j < last_ofs);
1391                                 assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);
1392                                 vals[offset + j].kind = BITFIELD;
1393                                 curr_bits = get_tarval_sub_bits(tv, j);
1394                                 vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
1395                                 value_len -= 8;
1396                                 last_bits = curr_bits;
1397                         }
1398                 } else {
1399                         int i;
1400
1401                         assert(offset < last_ofs);
1402                         assert(vals[offset].kind == NORMAL);
1403                         for (i = 1; i < value_len / 8; ++i) {
1404                                 assert(vals[offset + i].v.value == NULL);
1405                         }
1406                         vals[offset].v.value = value;
1407                 }
1408         }
1409
1410         /* now write them sorted */
1411         for (k = 0; k < last_ofs; ) {
1412                 int space = 0, skip = 0;
1413                 if (vals[k].kind == NORMAL) {
1414                         if (vals[k].v.value != NULL) {
1415                                 emit_node_data(env, vals[k].v.value, vals[k].type);
1416                                 skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1;
1417                         } else {
1418                                 space = 1;
1419                         }
1420                 } else {
1421                         assert(vals[k].kind == BITFIELD);
1422                         be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1423                 }
1424
1425                 ++k;
1426                 while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1427                         ++space;
1428                         ++k;
1429                 }
1430                 space -= skip;
1431                 assert(space >= 0);
1432
1433                 /* a gap */
1434                 if (space > 0) {
1435                         be_emit_irprintf("\t.space\t%d, 0\n", space);
1436                         be_emit_write_line();
1437                 }
1438         }
1439         xfree(vals);
1440 }
1441
1442 static void emit_align(unsigned p2alignment)
1443 {
1444         be_emit_irprintf("\t.p2align\t%u\n", log2_floor(p2alignment));
1445         be_emit_write_line();
1446 }
1447
1448 static unsigned get_effective_entity_alignment(const ir_entity *entity)
1449 {
1450         unsigned alignment = get_entity_alignment(entity);
1451         if (alignment == 0) {
1452                 ir_type *type = get_entity_type(entity);
1453                 alignment     = get_type_alignment_bytes(type);
1454         }
1455         return alignment;
1456 }
1457
1458 static void emit_common(const ir_entity *entity)
1459 {
1460         unsigned size      = get_type_size_bytes(get_entity_type(entity));
1461         unsigned alignment = get_effective_entity_alignment(entity);
1462
1463         if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1464                 emit_weak(entity);
1465         }
1466
1467         switch (be_gas_object_file_format) {
1468         case OBJECT_FILE_FORMAT_MACH_O:
1469                 be_emit_cstring("\t.comm ");
1470                 be_gas_emit_entity(entity);
1471                 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1472                 be_emit_write_line();
1473                 return;
1474         case OBJECT_FILE_FORMAT_ELF:
1475                 be_emit_cstring("\t.comm ");
1476                 be_gas_emit_entity(entity);
1477                 be_emit_irprintf(",%u,%u\n", size, alignment);
1478                 be_emit_write_line();
1479                 return;
1480         case OBJECT_FILE_FORMAT_COFF:
1481                 be_emit_cstring("\t.comm ");
1482                 be_gas_emit_entity(entity);
1483                 be_emit_irprintf(",%u # %u\n", size, alignment);
1484                 be_emit_write_line();
1485                 return;
1486         }
1487         panic("invalid object file format");
1488 }
1489
1490 static void emit_local_common(const ir_entity *entity)
1491 {
1492         unsigned size      = get_type_size_bytes(get_entity_type(entity));
1493         unsigned alignment = get_effective_entity_alignment(entity);
1494
1495         if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1496                 emit_weak(entity);
1497         }
1498
1499         switch (be_gas_object_file_format) {
1500         case OBJECT_FILE_FORMAT_MACH_O:
1501                 be_emit_cstring("\t.lcomm ");
1502                 be_gas_emit_entity(entity);
1503                 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1504                 be_emit_write_line();
1505                 return;
1506         case OBJECT_FILE_FORMAT_ELF:
1507                 be_emit_cstring("\t.local ");
1508                 be_gas_emit_entity(entity);
1509                 be_emit_cstring("\n");
1510                 be_emit_write_line();
1511                 be_emit_cstring("\t.comm ");
1512                 be_gas_emit_entity(entity);
1513                 be_emit_irprintf(",%u,%u\n", size, alignment);
1514                 be_emit_write_line();
1515                 return;
1516         case OBJECT_FILE_FORMAT_COFF:
1517                 be_emit_cstring("\t.lcomm ");
1518                 be_gas_emit_entity(entity);
1519                 be_emit_irprintf(",%u # %u\n", size, alignment);
1520                 be_emit_write_line();
1521                 return;
1522         }
1523         panic("invalid object file format");
1524 }
1525
1526 static void emit_indirect_symbol(const ir_entity *entity, be_gas_section_t section)
1527 {
1528         /* we can only do PIC code on macho so far */
1529         assert(be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O);
1530
1531         be_gas_emit_entity(entity);
1532         be_emit_cstring(":\n");
1533         be_emit_write_line();
1534         be_emit_irprintf("\t.indirect_symbol %I\n", get_entity_ident(entity));
1535         be_emit_write_line();
1536         if (section == GAS_SECTION_PIC_TRAMPOLINES) {
1537                 be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
1538                 be_emit_write_line();
1539         } else {
1540                 assert(section == GAS_SECTION_PIC_SYMBOLS);
1541                 be_emit_cstring("\t.long 0\n");
1542                 be_emit_write_line();
1543         }
1544 }
1545
1546 char const *be_gas_get_private_prefix(void)
1547 {
1548         return be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O ? "L" : ".L";
1549 }
1550
1551 void be_gas_emit_entity(const ir_entity *entity)
1552 {
1553         if (entity->type == get_code_type()) {
1554                 ir_label_t label = get_entity_label(entity);
1555                 be_emit_irprintf("%s_%lu", be_gas_get_private_prefix(), label);
1556                 return;
1557         }
1558
1559         if (get_entity_visibility(entity) == ir_visibility_private) {
1560                 be_emit_string(be_gas_get_private_prefix());
1561         }
1562         be_emit_irprintf("%I", get_entity_ld_ident(entity));
1563 }
1564
1565 void be_gas_emit_block_name(const ir_node *block)
1566 {
1567         ir_entity *entity = get_Block_entity(block);
1568         if (entity != NULL) {
1569                 be_gas_emit_entity(entity);
1570         } else {
1571                 void *nr_val = pmap_get(block_numbers, block);
1572                 int   nr;
1573                 if (nr_val == NULL) {
1574                         nr = next_block_nr++;
1575                         pmap_insert(block_numbers, block, INT_TO_PTR(nr+1));
1576                 } else {
1577                         nr = PTR_TO_INT(nr_val)-1;
1578                 }
1579                 be_emit_irprintf("%s%d", be_gas_get_private_prefix(), nr);
1580         }
1581 }
1582
1583 void be_gas_begin_block(const ir_node *block, bool needs_label)
1584 {
1585         if (needs_label) {
1586                 be_gas_emit_block_name(block);
1587                 be_emit_char(':');
1588         } else {
1589                 if (!be_options.verbose_asm)
1590                         return;
1591                 be_emit_cstring("/*");
1592                 be_gas_emit_block_name(block);
1593                 be_emit_cstring(":*/");
1594         }
1595
1596         if (be_options.verbose_asm) {
1597                 int           arity;
1598                 ir_graph     *irg       = get_irn_irg(block);
1599                 ir_exec_freq *exec_freq = be_get_irg_exec_freq(irg);
1600
1601                 be_emit_pad_comment();
1602                 be_emit_cstring("/* preds:");
1603
1604                 arity = get_irn_arity(block);
1605                 if (arity == 0) {
1606                         be_emit_cstring(" none");
1607                 } else {
1608                         int i;
1609                         for (i = 0; i < arity; ++i) {
1610                                 ir_node *predblock = get_Block_cfgpred_block(block, i);
1611                                 be_emit_char(' ');
1612                                 be_gas_emit_block_name(predblock);
1613                         }
1614                 }
1615                 if (exec_freq != NULL) {
1616                         be_emit_irprintf(", freq: %.3f",
1617                                          get_block_execfreq(exec_freq, block));
1618                 }
1619                 be_emit_cstring(" */");
1620         }
1621         be_emit_char('\n');
1622         be_emit_write_line();
1623 }
1624
1625 /**
1626  * Dump a global entity.
1627  *
1628  * @param env  the gas output environment
1629  * @param ent  the entity to be dumped
1630  */
1631 static void emit_global(be_gas_decl_env_t *env, const ir_entity *entity)
1632 {
1633         ir_type          *type       = get_entity_type(entity);
1634         ident            *ld_ident   = get_entity_ld_ident(entity);
1635         unsigned          alignment  = get_effective_entity_alignment(entity);
1636         be_gas_section_t  section    = determine_section(env, entity);
1637         ir_visibility     visibility = get_entity_visibility(entity);
1638         ir_linkage        linkage    = get_entity_linkage(entity);
1639
1640         /* Block labels are already emitted in the code. */
1641         if (type == get_code_type())
1642                 return;
1643
1644         /* we already emitted all methods with graphs in other functions like
1645          * be_gas_emit_function_prolog(). All others don't need to be emitted.
1646          */
1647         if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) {
1648                 return;
1649         }
1650
1651         be_dwarf_variable(entity);
1652
1653         if (section == GAS_SECTION_BSS) {
1654                 switch (visibility) {
1655                 case ir_visibility_local:
1656                 case ir_visibility_private:
1657                         emit_local_common(entity);
1658                         return;
1659                 case ir_visibility_external:
1660                         if (linkage & IR_LINKAGE_MERGE) {
1661                                 emit_common(entity);
1662                                 return;
1663                         }
1664                         break;
1665                 }
1666         }
1667
1668         emit_visibility(entity);
1669
1670         if (!is_po2(alignment))
1671                 panic("alignment not a power of 2");
1672
1673         emit_section(section, entity);
1674
1675         if (section == GAS_SECTION_PIC_TRAMPOLINES
1676                         || section == GAS_SECTION_PIC_SYMBOLS) {
1677                 emit_indirect_symbol(entity, section);
1678                 return;
1679         }
1680
1681         /* nothing left to do without an initializer */
1682         if (!entity_has_definition(entity))
1683                 return;
1684
1685         /* alignment */
1686         if (alignment > 1) {
1687                 emit_align(alignment);
1688         }
1689         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF
1690                         && be_gas_emit_types
1691                         && visibility != ir_visibility_private) {
1692                 be_emit_cstring("\t.type\t");
1693                 be_gas_emit_entity(entity);
1694                 be_emit_cstring(", ");
1695                 be_emit_char(be_gas_elf_type_char);
1696                 be_emit_cstring("object\n\t.size\t");\
1697                 be_gas_emit_entity(entity);
1698                 be_emit_irprintf(", %u\n", get_type_size_bytes(type));
1699         }
1700
1701         if (get_id_str(ld_ident)[0] != '\0') {
1702                 be_gas_emit_entity(entity);
1703                 be_emit_cstring(":\n");
1704                 be_emit_write_line();
1705         }
1706
1707         if (entity_is_null(entity)) {
1708                 /* we should use .space for stuff in the bss segment */
1709                 unsigned size = get_type_size_bytes(type);
1710                 if (size > 0) {
1711                         be_emit_irprintf("\t.space %u, 0\n", get_type_size_bytes(type));
1712                         be_emit_write_line();
1713                 }
1714         } else if (entity_has_compound_ent_values(entity)) {
1715                 emit_compound_graph_init(env, entity);
1716         } else {
1717                 assert(entity->initializer != NULL);
1718                 emit_initializer(env, entity);
1719         }
1720 }
1721
1722 /**
1723  * Dumps declarations of global variables and the initialization code.
1724  *
1725  * @param gt                a global like type, either the global or the TLS one
1726  * @param env               an environment
1727  */
1728 static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env)
1729 {
1730         size_t i, n = get_compound_n_members(gt);
1731
1732         for (i = 0; i < n; i++) {
1733                 ir_entity *ent = get_compound_member(gt, i);
1734                 emit_global(env, ent);
1735         }
1736 }
1737
1738 /* Generate all entities. */
1739 static void emit_global_decls(const be_main_env_t *main_env)
1740 {
1741         be_gas_decl_env_t env;
1742         memset(&env, 0, sizeof(env));
1743
1744         /* dump global type */
1745         env.main_env = main_env;
1746         env.section  = (be_gas_section_t) -1;
1747
1748         be_gas_emit_globals(get_glob_type(), &env);
1749         be_gas_emit_globals(get_tls_type(), &env);
1750         be_gas_emit_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env);
1751         be_gas_emit_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env);
1752         be_gas_emit_globals(main_env->pic_symbols_type, &env);
1753         be_gas_emit_globals(main_env->pic_trampolines_type, &env);
1754
1755         /**
1756          * ".subsections_via_symbols marks object files which are OK to divide
1757          * their section contents into individual blocks".
1758          * From my understanding this means no label points in the middle of an
1759          * object which we want to address as a whole. Firm code should be fine
1760          * with this.
1761          */
1762         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
1763                 be_emit_cstring("\t.subsections_via_symbols\n");
1764                 be_emit_write_line();
1765         }
1766 }
1767
1768 void be_emit_jump_table(const ir_node *node, const ir_switch_table *table,
1769                         ir_entity *entity, get_cfop_target_func get_cfop_target)
1770 {
1771         unsigned          n_outs    = arch_get_irn_n_outs(node);
1772         const ir_node   **targets   = XMALLOCNZ(const ir_node*, n_outs);
1773         size_t            n_entries = ir_switch_table_get_n_entries(table);
1774         unsigned long     length    = 0;
1775         size_t            e;
1776         const ir_edge_t  *edge;
1777         unsigned          i;
1778         const ir_node   **labels;
1779
1780         /* go over all proj's and collect their jump targets */
1781         foreach_out_edge(node, edge) {
1782                 ir_node *proj   = get_edge_src_irn(edge);
1783                 long     pn     = get_Proj_proj(proj);
1784                 ir_node *target = get_cfop_target(proj);
1785                 assert(targets[pn] == NULL);
1786                 targets[pn] = target;
1787         }
1788
1789         /* go over table to determine max value (note that we normalized the
1790          * ranges so that the minimum is 0) */
1791         for (e = 0; e < n_entries; ++e) {
1792                 const ir_switch_table_entry *entry
1793                         = ir_switch_table_get_entry_const(table, e);
1794                 ir_tarval *max = entry->max;
1795                 unsigned long val;
1796                 if (entry->pn == 0)
1797                         continue;
1798                 if (!tarval_is_long(max))
1799                         panic("switch case overflow (%+F)", node);
1800                 val = (unsigned long) get_tarval_long(max);
1801                 if (val > length) {
1802                         length = val;
1803                 }
1804         }
1805
1806         /* the 16000 isn't a real limit of the architecture. But should protect us
1807          * from seamingly endless compiler runs */
1808         if (length > 16000) {
1809                 /* switch lowerer should have broken this monster to pieces... */
1810                 panic("too large switch encountered (%+F)", node);
1811         }
1812         ++length;
1813
1814         labels = XMALLOCNZ(const ir_node*, length);
1815         for (e = 0; e < n_entries; ++e) {
1816                 const ir_switch_table_entry *entry
1817                         = ir_switch_table_get_entry_const(table, e);
1818                 ir_tarval     *min    = entry->min;
1819                 ir_tarval     *max    = entry->max;
1820                 const ir_node *target = targets[entry->pn];
1821                 assert(entry->pn < (long)n_outs);
1822                 if (min == max) {
1823                         unsigned long val = (unsigned long)get_tarval_long(max);
1824                         labels[val] = target;
1825                 } else {
1826                         unsigned long min_val;
1827                         unsigned long max_val;
1828                         unsigned long i;
1829                         if (!tarval_is_long(min))
1830                                 panic("switch case overflow (%+F)", node);
1831                         min_val = (unsigned long)get_tarval_long(min);
1832                         max_val = (unsigned long)get_tarval_long(max);
1833                         assert(min_val <= max_val);
1834                         for (i = min_val; i <= max_val; ++i) {
1835                                 labels[i] = target;
1836                         }
1837                 }
1838         }
1839
1840         /* emit table */
1841         if (entity != NULL) {
1842                 be_gas_emit_switch_section(GAS_SECTION_RODATA);
1843                 be_emit_cstring("\t.align 4\n");
1844                 be_gas_emit_entity(entity);
1845                 be_emit_cstring(":\n");
1846         }
1847
1848         for (i = 0; i < length; ++i) {
1849                 const ir_node *block = labels[i];
1850                 if (block == NULL)
1851                         block = targets[0];
1852                 be_emit_cstring("\t.long ");
1853                 be_gas_emit_block_name(block);
1854                 be_emit_char('\n');
1855                 be_emit_write_line();
1856         }
1857
1858         if (entity != NULL)
1859                 be_gas_emit_switch_section(GAS_SECTION_TEXT);
1860
1861         xfree(labels);
1862         xfree(targets);
1863 }
1864
1865 static void emit_global_asms(void)
1866 {
1867         size_t n = get_irp_n_asms();
1868         size_t i;
1869
1870         be_gas_emit_switch_section(GAS_SECTION_TEXT);
1871         for (i = 0; i < n; ++i) {
1872                 ident *asmtext = get_irp_asm(i);
1873
1874                 be_emit_cstring("#APP\n");
1875                 be_emit_write_line();
1876                 be_emit_irprintf("%I\n", asmtext);
1877                 be_emit_write_line();
1878                 be_emit_cstring("#NO_APP\n");
1879                 be_emit_write_line();
1880         }
1881 }
1882
1883 void be_gas_begin_compilation_unit(const be_main_env_t *env)
1884 {
1885         be_dwarf_open();
1886         be_dwarf_unit_begin(env->cup_name);
1887
1888         block_numbers = pmap_create();
1889         next_block_nr = 0;
1890
1891         emit_global_asms();
1892 }
1893
1894 void be_gas_end_compilation_unit(const be_main_env_t *env)
1895 {
1896         emit_global_decls(env);
1897
1898         pmap_destroy(block_numbers);
1899
1900         be_dwarf_unit_end();
1901         be_dwarf_close();
1902 }