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 #include "execfreq.h"
  43
  44 #include "be_t.h"
  45 #include "beemitter.h"
  46 #include "bedwarf.h"
  47
  48 /** by default, we generate assembler code for the Linux gas */
  49 object_file_format_t  be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF;
  50 elf_variant_t         be_gas_elf_variant        = ELF_VARIANT_NORMAL;
  51 bool                  be_gas_emit_types         = true;
  52 char                  be_gas_elf_type_char      = '@';
  53
  54 static be_gas_section_t current_section = (be_gas_section_t) -1;
  55 static pmap            *block_numbers;
  56 static unsigned         next_block_nr;
  57
  58 /**
  59  * An environment containing all needed dumper data.
  60  * Currently we create the file completely in memory first, then
  61  * write it to the disk. This is an artifact from the old C-generating backend
  62  * and even there NOT needed. So we might change it in the future.
  63  */
  64 typedef struct be_gas_decl_env {
  65         be_gas_section_t     section;
  66         const be_main_env_t *main_env;
  67 } be_gas_decl_env_t;
  68
  69 static void emit_section_macho(be_gas_section_t section)
  70 {
  71         be_gas_section_t  base  = section & GAS_SECTION_TYPE_MASK;
  72         be_gas_section_t  flags = section & ~GAS_SECTION_TYPE_MASK;
  73         const char       *name;
  74
  75         if (current_section == section)
  76                 return;
  77         current_section = section;
  78
  79         /* shortforms */
  80         if (flags == 0) {
  81                 switch (base) {
  82                 case GAS_SECTION_TEXT:            name = "text";          break;
  83                 case GAS_SECTION_DATA:            name = "data";          break;
  84                 case GAS_SECTION_RODATA:          name = "const";         break;
  85                 case GAS_SECTION_BSS:             name = "data";          break;
  86                 case GAS_SECTION_CONSTRUCTORS:    name = "mod_init_func"; break;
  87                 case GAS_SECTION_DESTRUCTORS:     name = "mod_term_func"; break;
  88                 case GAS_SECTION_PIC_TRAMPOLINES: name = "section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5"; break;
  89                 case GAS_SECTION_PIC_SYMBOLS:     name = "section\t__IMPORT,__pointers,non_lazy_symbol_pointers"; break;
  90                 case GAS_SECTION_CSTRING:         name = "cstring";       break;
  91                 case GAS_SECTION_DEBUG_INFO:      name = "section __DWARF,__debug_info,regular,debug"; break;
  92                 case GAS_SECTION_DEBUG_ABBREV:    name = "section __DWARF,__debug_abbrev,regular,debug"; break;
  93                 case GAS_SECTION_DEBUG_LINE:      name = "section __DWARF,__debug_line,regular,debug"; break;
  94                 case GAS_SECTION_DEBUG_PUBNAMES:  name = "section __DWARF,__debug_pubnames,regular,debug"; break;
  95                 case GAS_SECTION_DEBUG_FRAME:     name = "section __DWARF,__debug_frame,regular,debug"; break;
  96                 default: panic("unsupported scetion type 0x%X", section);
  97                 }
  98                 be_emit_irprintf("\t.%s\n", name);
  99                 be_emit_write_line();
 100         } else if (flags & GAS_SECTION_FLAG_COMDAT) {
 101                 switch (base) {
 102                 case GAS_SECTION_TEXT:            name = "section __TEXT,__textcoal_nt,coalesced,pure_instructions"; break;
 103                 case GAS_SECTION_BSS:
 104                 case GAS_SECTION_DATA:            name = "section __DATA,__datacoal_nt,coalesced"; break;
 105                 case GAS_SECTION_RODATA:          name = "section __TEXT,__const_coal,coalesced"; break;
 106                 case GAS_SECTION_CSTRING:         name = "section __TEXT,__const_coal,coalesced"; break;
 107                 default: panic("unsupported scetion type 0x%X", section);
 108                 }
 109         } else if (flags & GAS_SECTION_FLAG_TLS) {
 110                 panic("thread local storage not supported on macho (section 0x%X)", section);
 111         } else {
 112                 panic("unsupported section type 0x%X", section);
 113         }
 114 }
 115
 116 static void emit_section_sparc(be_gas_section_t section, const ir_entity *entity)
 117 {
 118         be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
 119         be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
 120         static const char *const basename[GAS_SECTION_LAST+1] = {
 121                 "text",
 122                 "data",
 123                 "rodata",
 124                 "bss",
 125                 "ctors",
 126                 "dtors",
 127                 NULL, /* cstring */
 128                 NULL, /* pic trampolines */
 129                 NULL, /* pic symbols */
 130                 "debug_info",
 131                 "debug_abbrev",
 132                 "debug_line",
 133                 "debug_pubnames"
 134                 "debug_frame",
 135         };
 136
 137         if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
 138                 return;
 139         current_section = section;
 140
 141         be_emit_cstring("\t.section\t\".");
 142
 143         /* Part1: section-name */
 144         if (flags & GAS_SECTION_FLAG_TLS)
 145                 be_emit_char('t');
 146         assert(base < (be_gas_section_t)ARRAY_SIZE(basename));
 147         be_emit_string(basename[base]);
 148
 149         if (flags & GAS_SECTION_FLAG_COMDAT) {
 150                 be_emit_char('.');
 151                 be_gas_emit_entity(entity);
 152         }
 153         be_emit_char('"');
 154
 155         /* for the simple sections we're done here */
 156         if (flags == 0)
 157                 goto end;
 158
 159         be_emit_cstring(",#alloc");
 160
 161         switch (base) {
 162         case GAS_SECTION_TEXT: be_emit_cstring(",#execinstr"); break;
 163         case GAS_SECTION_DATA:
 164         case GAS_SECTION_BSS:  be_emit_cstring(",#write"); break;
 165         default:
 166                 /* nothing */
 167                 break;
 168         }
 169         if (flags & GAS_SECTION_FLAG_TLS) {
 170                 be_emit_cstring(",#tls");
 171         }
 172
 173 end:
 174         be_emit_char('\n');
 175         be_emit_write_line();
 176 }
 177
 178 static void emit_section(be_gas_section_t section, const ir_entity *entity)
 179 {
 180         be_gas_section_t base = section & GAS_SECTION_TYPE_MASK;
 181         be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK;
 182         const char *f;
 183         static const struct {
 184                 const char *name;
 185                 const char *type;
 186                 const char *flags;
 187         } sectioninfos[GAS_SECTION_LAST+1] = {
 188                 { "text",           "progbits", "ax" },
 189                 { "data",           "progbits", "aw" },
 190                 { "rodata",         "progbits", "a"  },
 191                 { "bss",            "nobits",   "aw" },
 192                 { "ctors",          "progbits", "aw" },
 193                 { "dtors",          "progbits", "aw" },
 194                 { NULL,             NULL,       NULL }, /* cstring */
 195                 { NULL,             NULL,       NULL }, /* pic trampolines */
 196                 { NULL,             NULL,       NULL }, /* pic symbols */
 197                 { "debug_info",     "progbits", ""   },
 198                 { "debug_abbrev",   "progbits", ""   },
 199                 { "debug_line",     "progbits", ""   },
 200                 { "debug_pubnames", "progbits", ""   },
 201                 { "debug_frame",    "progbits", ""   },
 202         };
 203
 204         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 205                 emit_section_macho(section);
 206                 return;
 207         } else if(be_gas_elf_variant == ELF_VARIANT_SPARC) {
 208                 emit_section_sparc(section, entity);
 209                 return;
 210         }
 211
 212         if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT))
 213                 return;
 214         current_section = section;
 215
 216         /* shortforms */
 217         if (flags == 0) {
 218                 switch (base) {
 219                 case GAS_SECTION_TEXT:
 220                         be_emit_cstring("\t.text\n");
 221                         be_emit_write_line();
 222                         return;
 223                 case GAS_SECTION_DATA:
 224                         be_emit_cstring("\t.data\n");
 225                         be_emit_write_line();
 226                         return;
 227                 case GAS_SECTION_RODATA:
 228                         be_emit_cstring("\t.section\t.rodata\n");
 229                         be_emit_write_line();
 230                         return;
 231                 case GAS_SECTION_BSS:
 232                         be_emit_cstring("\t.bss\n");
 233                         be_emit_write_line();
 234                         return;
 235                 default:
 236                         break;
 237                 }
 238         }
 239
 240         assert(base < (be_gas_section_t) ARRAY_SIZE(sectioninfos));
 241         be_emit_cstring("\t.section\t.");
 242         /* section name */
 243         if (flags & GAS_SECTION_FLAG_TLS)
 244                 be_emit_char('t');
 245         be_emit_string(sectioninfos[base].name);
 246         if (flags & GAS_SECTION_FLAG_COMDAT) {
 247                 be_emit_char('.');
 248                 be_gas_emit_entity(entity);
 249         }
 250
 251         /* section flags */
 252         be_emit_cstring(",\"");
 253         for (f = sectioninfos[base].flags; *f != '\0'; ++f) {
 254                 be_emit_char(*f);
 255         }
 256         if (flags & GAS_SECTION_FLAG_TLS)
 257                 be_emit_char('T');
 258         if (flags & GAS_SECTION_FLAG_COMDAT)
 259                 be_emit_char('G');
 260
 261         /* section type */
 262         if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) {
 263                 be_emit_cstring("\",");
 264                 be_emit_char(be_gas_elf_type_char);
 265                 be_emit_string(sectioninfos[base].type);
 266         }
 267
 268         if (flags & GAS_SECTION_FLAG_COMDAT) {
 269                 be_emit_char(',');
 270                 be_gas_emit_entity(entity);
 271                 be_emit_cstring(",comdat");
 272         }
 273         be_emit_char('\n');
 274         be_emit_write_line();
 275 }
 276
 277
 278
 279 void be_gas_emit_switch_section(be_gas_section_t section)
 280 {
 281         /* you have to produce a switch_section call with entity manually
 282          * for comdat sections */
 283         assert( !(section & GAS_SECTION_FLAG_COMDAT));
 284
 285         emit_section(section, NULL);
 286 }
 287
 288 static ir_tarval *get_initializer_tarval(const ir_initializer_t *initializer)
 289 {
 290         if (initializer->kind == IR_INITIALIZER_TARVAL)
 291                 return initializer->tarval.value;
 292         if (initializer->kind == IR_INITIALIZER_CONST) {
 293                 ir_node *node = initializer->consti.value;
 294                 if (is_Const(node)) {
 295                         return get_Const_tarval(node);
 296                 }
 297         }
 298         return get_tarval_undefined();
 299 }
 300
 301 static bool initializer_is_string_const(const ir_initializer_t *initializer)
 302 {
 303         size_t i, len;
 304         bool found_printable = false;
 305
 306         if (initializer->kind != IR_INITIALIZER_COMPOUND)
 307                 return false;
 308
 309         len = initializer->compound.n_initializers;
 310         if (len < 1)
 311                 return false;
 312         for (i = 0; i < len; ++i) {
 313                 int               c;
 314                 ir_tarval        *tv;
 315                 ir_mode          *mode;
 316                 ir_initializer_t *sub_initializer
 317                         = initializer->compound.initializers[i];
 318
 319                 tv = get_initializer_tarval(sub_initializer);
 320                 if (!tarval_is_constant(tv))
 321                         return false;
 322
 323                 mode = get_tarval_mode(tv);
 324                 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
 325                         return false;
 326
 327                 c = get_tarval_long(tv);
 328                 if (isgraph(c) || isspace(c))
 329                         found_printable = true;
 330                 else if (c != 0)
 331                         return false;
 332
 333                 if (i == len - 1 && c != '\0')
 334                         return false;
 335         }
 336
 337         return found_printable;
 338 }
 339
 340 static bool initializer_is_null(const ir_initializer_t *initializer)
 341 {
 342         switch (initializer->kind) {
 343         case IR_INITIALIZER_NULL:
 344                 return true;
 345         case IR_INITIALIZER_TARVAL: {
 346                 ir_tarval *tv = initializer->tarval.value;
 347                 return tarval_is_null(tv);
 348         }
 349         case IR_INITIALIZER_CONST: {
 350                 ir_node *value = initializer->consti.value;
 351                 if (!is_Const(value))
 352                         return false;
 353                 return is_Const_null(value);
 354         }
 355         case IR_INITIALIZER_COMPOUND: {
 356                 size_t i;
 357                 for (i = 0; i < initializer->compound.n_initializers; ++i) {
 358                         ir_initializer_t *subinitializer
 359                                 = initializer->compound.initializers[i];
 360                         if (!initializer_is_null(subinitializer))
 361                                 return false;
 362                 }
 363                 return true;
 364         }
 365         }
 366         panic("invalid initializer in initializer_is_null");
 367 }
 368
 369 /**
 370  * Determine if an entity is a string constant
 371  * @param ent The entity
 372  * @return 1 if it is a string constant, 0 otherwise
 373  */
 374 static int entity_is_string_const(const ir_entity *ent)
 375 {
 376         ir_type *type, *element_type;
 377         ir_mode *mode;
 378         int i, c, n;
 379
 380         type = get_entity_type(ent);
 381
 382         /* if it's an array */
 383         if (!is_Array_type(type))
 384                 return 0;
 385
 386         element_type = get_array_element_type(type);
 387
 388         /* and the array's element type is primitive */
 389         if (!is_Primitive_type(element_type))
 390                 return 0;
 391
 392         /* and the mode of the element type is an int of
 393          * the same size as the byte mode */
 394         mode = get_type_mode(element_type);
 395         if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
 396                 return 0;
 397
 398         if (ent->initializer != NULL) {
 399                 return initializer_is_string_const(ent->initializer);
 400         } else if (entity_has_compound_ent_values(ent)) {
 401                 int found_printable = 0;
 402                 /* if it contains only printable chars and a 0 at the end */
 403                 n = get_compound_ent_n_values(ent);
 404                 for (i = 0; i < n; ++i) {
 405                         ir_node *irn = get_compound_ent_value(ent, i);
 406                         if (! is_Const(irn))
 407                                 return 0;
 408
 409                         c = (int) get_tarval_long(get_Const_tarval(irn));
 410
 411                         if (isgraph(c) || isspace(c))
 412                                 found_printable = 1;
 413                         else if (c != 0)
 414                                 return 0;
 415
 416                         if (i == n - 1 && c != '\0')
 417                                 return 0;
 418                 }
 419                 return found_printable;
 420         }
 421
 422         return 0;
 423 }
 424
 425 static bool entity_is_null(const ir_entity *entity)
 426 {
 427         ir_initializer_t *initializer = get_entity_initializer(entity);
 428         return initializer == NULL || initializer_is_null(initializer);
 429 }
 430
 431 static bool is_comdat(const ir_entity *entity)
 432 {
 433         ir_linkage linkage = get_entity_linkage(entity);
 434         return (linkage & IR_LINKAGE_MERGE)
 435                 && (linkage & IR_LINKAGE_GARBAGE_COLLECT);
 436 }
 437
 438 static be_gas_section_t determine_basic_section(const ir_entity *entity)
 439 {
 440         ir_linkage linkage;
 441
 442         if (is_method_entity(entity))
 443                 return GAS_SECTION_TEXT;
 444
 445         linkage = get_entity_linkage(entity);
 446         if (linkage & IR_LINKAGE_CONSTANT) {
 447                 /* mach-o is the only one with a cstring section */
 448                 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
 449                     && entity_is_string_const(entity))
 450                         return GAS_SECTION_CSTRING;
 451
 452                 return GAS_SECTION_RODATA;
 453         }
 454         if (entity_is_null(entity))
 455                 return GAS_SECTION_BSS;
 456
 457         return GAS_SECTION_DATA;
 458 }
 459
 460 static be_gas_section_t determine_section(be_gas_decl_env_t *env,
 461                                           const ir_entity *entity)
 462 {
 463         ir_type *owner = get_entity_owner(entity);
 464
 465         if (owner == get_segment_type(IR_SEGMENT_GLOBAL)) {
 466                 be_gas_section_t section = determine_basic_section(entity);
 467                 if (is_comdat(entity))
 468                         section |= GAS_SECTION_FLAG_COMDAT;
 469                 return section;
 470         } else if (env != NULL && owner == env->main_env->pic_symbols_type) {
 471                 return GAS_SECTION_PIC_SYMBOLS;
 472         } else if (env != NULL && owner == env->main_env->pic_trampolines_type) {
 473                 return GAS_SECTION_PIC_TRAMPOLINES;
 474         } else if (owner == get_segment_type(IR_SEGMENT_CONSTRUCTORS)) {
 475                 return GAS_SECTION_CONSTRUCTORS;
 476         } else if (owner == get_segment_type(IR_SEGMENT_DESTRUCTORS)) {
 477                 return GAS_SECTION_DESTRUCTORS;
 478         } else if (owner == get_segment_type(IR_SEGMENT_THREAD_LOCAL)) {
 479                 be_gas_section_t section = determine_basic_section(entity);
 480                 if (is_comdat(entity))
 481                         section |= GAS_SECTION_FLAG_COMDAT;
 482
 483                 return section | GAS_SECTION_FLAG_TLS;
 484         }
 485
 486         /* the java frontend keeps some functions inside classes */
 487         if (is_Class_type(owner)) {
 488                 return determine_basic_section(entity);
 489         }
 490
 491         panic("Couldn't determine section for %+F?!?", entity);
 492 }
 493
 494 static void emit_weak(const ir_entity *entity)
 495 {
 496         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 497                 be_emit_cstring("\t.weak_reference ");
 498         } else {
 499                 be_emit_cstring("\t.weak ");
 500         }
 501         be_gas_emit_entity(entity);
 502         be_emit_char('\n');
 503         be_emit_write_line();
 504 }
 505
 506 static void emit_visibility(const ir_entity *entity)
 507 {
 508         ir_linkage const linkage = get_entity_linkage(entity);
 509
 510         if (linkage & IR_LINKAGE_WEAK) {
 511                 emit_weak(entity);
 512                 /* Note: .weak seems to imply .globl so no need to output .globl */
 513         } else if (get_entity_visibility(entity) == ir_visibility_external
 514                    && entity_has_definition(entity)) {
 515                 be_emit_cstring("\t.globl ");
 516                 be_gas_emit_entity(entity);
 517                 be_emit_char('\n');
 518                 be_emit_write_line();
 519         }
 520
 521         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O
 522                         && (linkage & IR_LINKAGE_HIDDEN_USER)
 523                         && get_entity_ld_name(entity)[0] != '\0') {
 524                 be_emit_cstring("\t.no_dead_strip ");
 525                 be_gas_emit_entity(entity);
 526                 be_emit_char('\n');
 527                 be_emit_write_line();
 528         }
 529 }
 530
 531 void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment, const parameter_dbg_info_t *parameter_infos)
 532 {
 533         be_gas_section_t section;
 534
 535         be_dwarf_method_before(entity, parameter_infos);
 536
 537         section = determine_section(NULL, entity);
 538         emit_section(section, entity);
 539
 540         /* write the begin line (makes the life easier for scripts parsing the
 541          * assembler) */
 542         if (be_options.verbose_asm) {
 543                 be_emit_cstring("# -- Begin  ");
 544                 be_gas_emit_entity(entity);
 545                 be_emit_char('\n');
 546                 be_emit_write_line();
 547         }
 548
 549         if (po2alignment > 0) {
 550                 const char *fill_byte = "";
 551                 unsigned    maximum_skip = (1 << po2alignment) - 1;
 552                 /* gcc fills space between function with 0x90... */
 553                 if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 554                         fill_byte = "0x90";
 555                 }
 556                 be_emit_cstring("\t.p2align ");
 557                 be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip);
 558                 be_emit_write_line();
 559         }
 560         emit_visibility(entity);
 561
 562         switch (be_gas_object_file_format) {
 563         case OBJECT_FILE_FORMAT_ELF:
 564                 be_emit_cstring("\t.type\t");
 565                 be_gas_emit_entity(entity);
 566                 be_emit_cstring(", ");
 567                 be_emit_char(be_gas_elf_type_char);
 568                 be_emit_cstring("function\n");
 569                 be_emit_write_line();
 570                 break;
 571         case OBJECT_FILE_FORMAT_COFF:
 572                 be_emit_cstring("\t.def\t");
 573                 be_gas_emit_entity(entity);
 574                 be_emit_cstring(";");
 575                 if (get_entity_visibility(entity) == ir_visibility_local) {
 576                         be_emit_cstring("\t.scl\t3;");
 577                 } else {
 578                         be_emit_cstring("\t.scl\t2;");
 579                 }
 580                 be_emit_cstring("\t.type\t32;\t.endef\n");
 581                 be_emit_write_line();
 582                 break;
 583         case OBJECT_FILE_FORMAT_MACH_O:
 584                 break;
 585         }
 586         be_gas_emit_entity(entity);
 587         be_emit_cstring(":\n");
 588         be_emit_write_line();
 589
 590         be_dwarf_method_begin();
 591 }
 592
 593 void be_gas_emit_function_epilog(const ir_entity *entity)
 594 {
 595         be_dwarf_method_end();
 596
 597         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF) {
 598                 be_emit_cstring("\t.size\t");
 599                 be_gas_emit_entity(entity);
 600                 be_emit_cstring(", .-");
 601                 be_gas_emit_entity(entity);
 602                 be_emit_char('\n');
 603                 be_emit_write_line();
 604         }
 605
 606         if (be_options.verbose_asm) {
 607                 be_emit_cstring("# -- End  ");
 608                 be_gas_emit_entity(entity);
 609                 be_emit_char('\n');
 610                 be_emit_write_line();
 611         }
 612
 613         be_emit_char('\n');
 614         be_emit_write_line();
 615 }
 616
 617 /**
 618  * Output a tarval.
 619  *
 620  * @param tv     the tarval
 621  * @param bytes  the width of the tarvals value in bytes
 622  */
 623 static void emit_arith_tarval(ir_tarval *tv, unsigned bytes)
 624 {
 625         switch (bytes) {
 626         case 1:
 627                 be_emit_irprintf("0x%02x", get_tarval_sub_bits(tv, 0));
 628                 return;
 629
 630         case 2:
 631                 be_emit_irprintf("0x%02x%02x",
 632                         get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 633                 return;
 634
 635         case 4:
 636                 be_emit_irprintf("0x%02x%02x%02x%02x",
 637                         get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
 638                         get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 639                 return;
 640
 641         case 8:
 642                 be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x",
 643                         get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6),
 644                         get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
 645                         get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2),
 646                         get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 647                 return;
 648         }
 649
 650         panic("Can't dump a tarval with %d bytes", bytes);
 651 }
 652
 653 /**
 654  * Return the label prefix for labeled instructions.
 655  */
 656 const char *be_gas_insn_label_prefix(void)
 657 {
 658         return ".LE";
 659 }
 660
 661 /**
 662  * Return the tarval of an atomic initializer.
 663  *
 664  * @param init  a node representing the initializer (on the const code irg)
 665  *
 666  * @return the tarval
 667  */
 668 static ir_tarval *get_atomic_init_tv(ir_node *init)
 669 {
 670         for (;;) {
 671                 ir_mode *mode = get_irn_mode(init);
 672
 673                 switch (get_irn_opcode(init)) {
 674
 675                 case iro_Cast:
 676                         init = get_Cast_op(init);
 677                         continue;
 678
 679                 case iro_Conv:
 680                         init = get_Conv_op(init);
 681                         continue;
 682
 683                 case iro_Const:
 684                         return get_Const_tarval(init);
 685
 686                 case iro_SymConst:
 687                         switch (get_SymConst_kind(init)) {
 688                         case symconst_type_size:
 689                                 return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode);
 690
 691                         case symconst_type_align:
 692                                 return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
 693
 694                         case symconst_ofs_ent:
 695                                 return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
 696
 697                         case symconst_enum_const:
 698                                 return get_enumeration_value(get_SymConst_enum(init));
 699
 700                         default:
 701                                 return NULL;
 702                         }
 703
 704                 default:
 705                         return NULL;
 706                 }
 707         }
 708 }
 709
 710 /**
 711  * Dump an atomic value.
 712  *
 713  * @param env   the gas output environment
 714  * @param init  a node representing the atomic value (on the const code irg)
 715  */
 716 static void emit_init_expression(be_gas_decl_env_t *env, ir_node *init)
 717 {
 718         ir_mode *mode = get_irn_mode(init);
 719         int bytes     = get_mode_size_bytes(mode);
 720         ir_tarval *tv;
 721         ir_entity *ent;
 722
 723         init = skip_Id(init);
 724
 725         switch (get_irn_opcode(init)) {
 726         case iro_Cast:
 727                 emit_init_expression(env, get_Cast_op(init));
 728                 return;
 729
 730         case iro_Conv:
 731                 emit_init_expression(env, get_Conv_op(init));
 732                 return;
 733
 734         case iro_Const:
 735                 tv = get_Const_tarval(init);
 736
 737                 /* it's an arithmetic value */
 738                 emit_arith_tarval(tv, bytes);
 739                 return;
 740
 741         case iro_SymConst:
 742                 switch (get_SymConst_kind(init)) {
 743                 case symconst_addr_ent:
 744                         ent = get_SymConst_entity(init);
 745                         be_gas_emit_entity(ent);
 746                         break;
 747
 748                 case symconst_ofs_ent:
 749                         ent = get_SymConst_entity(init);
 750                         be_emit_irprintf("%d", get_entity_offset(ent));
 751                         break;
 752
 753                 case symconst_type_size:
 754                         be_emit_irprintf("%u", get_type_size_bytes(get_SymConst_type(init)));
 755                         break;
 756
 757                 case symconst_type_align:
 758                         be_emit_irprintf("%u", get_type_alignment_bytes(get_SymConst_type(init)));
 759                         break;
 760
 761                 case symconst_enum_const:
 762                         tv = get_enumeration_value(get_SymConst_enum(init));
 763                         emit_arith_tarval(tv, bytes);
 764                         break;
 765
 766                 default:
 767                         assert(!"emit_atomic_init(): don't know how to init from this SymConst");
 768                 }
 769                 return;
 770
 771         case iro_Add:
 772                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 773                         panic("Constant must be int or pointer for '+' to work");
 774                 }
 775                 emit_init_expression(env, get_Add_left(init));
 776                 be_emit_cstring(" + ");
 777                 emit_init_expression(env, get_Add_right(init));
 778                 return;
 779
 780         case iro_Sub:
 781                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 782                         panic("Constant must be int or pointer for '-' to work");
 783                 }
 784                 emit_init_expression(env, get_Sub_left(init));
 785                 be_emit_cstring(" - ");
 786                 emit_init_expression(env, get_Sub_right(init));
 787                 return;
 788
 789         case iro_Mul:
 790                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 791                         panic("Constant must be int or pointer for '*' to work");
 792                 }
 793                 emit_init_expression(env, get_Mul_left(init));
 794                 be_emit_cstring(" * ");
 795                 emit_init_expression(env, get_Mul_right(init));
 796                 return;
 797
 798         case iro_Unknown:
 799                 be_emit_cstring("0");
 800                 return;
 801
 802         default:
 803                 panic("emit_atomic_init(): unsupported IR-node %+F", init);
 804         }
 805 }
 806
 807 /**
 808  * Dumps the type for given size (.byte, .long, ...)
 809  *
 810  * @param size  the size in bytes
 811  */
 812 static void emit_size_type(size_t size)
 813 {
 814         switch (size) {
 815         case 1: be_emit_cstring("\t.byte\t");  break;
 816         case 2: be_emit_cstring("\t.short\t"); break;
 817         case 4: be_emit_cstring("\t.long\t");  break;
 818         case 8: be_emit_cstring("\t.quad\t");  break;
 819
 820         default:
 821                 panic("Try to dump a type with %u bytes", (unsigned)size);
 822         }
 823 }
 824
 825 /**
 826  * Dump a string constant.
 827  * No checks are made!!
 828  *
 829  * @param ent  The entity to dump.
 830  */
 831 static void emit_string_cst(const ir_entity *ent)
 832 {
 833         int      i, len;
 834         int      output_len;
 835         ir_type *type;
 836         int      type_size;
 837         int      remaining_space;
 838
 839         len        = get_compound_ent_n_values(ent);
 840         output_len = len;
 841         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 842                 be_emit_cstring("\t.ascii \"");
 843         } else {
 844                 be_emit_cstring("\t.string \"");
 845                 output_len -= 1;
 846         }
 847
 848         for (i = 0; i < output_len; ++i) {
 849                 ir_node *irn;
 850                 int c;
 851
 852                 irn = get_compound_ent_value(ent, i);
 853                 c = (int) get_tarval_long(get_Const_tarval(irn));
 854
 855                 switch (c) {
 856                 case '"' : be_emit_cstring("\\\""); break;
 857                 case '\n': be_emit_cstring("\\n"); break;
 858                 case '\r': be_emit_cstring("\\r"); break;
 859                 case '\t': be_emit_cstring("\\t"); break;
 860                 case '\\': be_emit_cstring("\\\\"); break;
 861                 default  :
 862                         if (isprint(c))
 863                                 be_emit_char(c);
 864                         else
 865                                 be_emit_irprintf("\\%03o", c);
 866                         break;
 867                 }
 868         }
 869         be_emit_cstring("\"\n");
 870         be_emit_write_line();
 871
 872         type            = get_entity_type(ent);
 873         type_size       = get_type_size_bytes(type);
 874         remaining_space = type_size - len;
 875         assert(remaining_space >= 0);
 876         if (remaining_space > 0) {
 877                 be_emit_irprintf("\t.space\t%d, 0\n", remaining_space);
 878         }
 879 }
 880
 881 static size_t emit_string_initializer(const ir_initializer_t *initializer)
 882 {
 883         size_t i, len;
 884
 885         len = initializer->compound.n_initializers;
 886         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
 887                 be_emit_cstring("\t.ascii \"");
 888         } else {
 889                 be_emit_cstring("\t.string \"");
 890                 len -= 1;
 891         }
 892
 893         for (i = 0; i < len; ++i) {
 894                 const ir_initializer_t *sub_initializer
 895                         = get_initializer_compound_value(initializer, i);
 896
 897                 ir_tarval *tv = get_initializer_tarval(sub_initializer);
 898                 int        c  = get_tarval_long(tv);
 899
 900                 switch (c) {
 901                 case '"' : be_emit_cstring("\\\""); break;
 902                 case '\n': be_emit_cstring("\\n"); break;
 903                 case '\r': be_emit_cstring("\\r"); break;
 904                 case '\t': be_emit_cstring("\\t"); break;
 905                 case '\\': be_emit_cstring("\\\\"); break;
 906                 default  :
 907                         if (isprint(c))
 908                                 be_emit_char(c);
 909                         else
 910                                 be_emit_irprintf("\\%03o", c);
 911                         break;
 912                 }
 913         }
 914         be_emit_cstring("\"\n");
 915         be_emit_write_line();
 916
 917         return initializer->compound.n_initializers;
 918 }
 919
 920 typedef enum normal_or_bitfield_kind {
 921         NORMAL = 0,
 922         TARVAL,
 923         STRING,
 924         BITFIELD
 925 } normal_or_bitfield_kind;
 926
 927 typedef struct {
 928         normal_or_bitfield_kind kind;
 929         ir_type                *type;
 930         union {
 931                 ir_node                *value;
 932                 ir_tarval              *tarval;
 933                 unsigned char           bf_val;
 934                 const ir_initializer_t *string;
 935         } v;
 936 } normal_or_bitfield;
 937
 938 static size_t get_initializer_size(const ir_initializer_t *initializer,
 939                                    ir_type *type)
 940 {
 941         switch (get_initializer_kind(initializer)) {
 942         case IR_INITIALIZER_TARVAL:
 943                 assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type));
 944                 return get_type_size_bytes(type);
 945         case IR_INITIALIZER_CONST:
 946         case IR_INITIALIZER_NULL:
 947                 return get_type_size_bytes(type);
 948         case IR_INITIALIZER_COMPOUND:
 949                 if (is_Array_type(type)) {
 950                         if (is_array_variable_size(type)) {
 951                                 ir_type   *element_type = get_array_element_type(type);
 952                                 unsigned   element_size = get_type_size_bytes(element_type);
 953                                 unsigned   element_align
 954                                         = get_type_alignment_bytes(element_type);
 955                                 unsigned   misalign     = element_size % element_align;
 956                                 size_t     n_inits
 957                                         = get_initializer_compound_n_entries(initializer);
 958                                 element_size += element_align - misalign;
 959                                 return n_inits * element_size;
 960                         } else {
 961                                 return get_type_size_bytes(type);
 962                         }
 963                 } else {
 964                         assert(is_compound_type(type));
 965                         size_t size = get_type_size_bytes(type);
 966                         if (is_compound_variable_size(type)) {
 967                                 /* last initializer has to be an array of variable size */
 968                                 size_t l = get_initializer_compound_n_entries(initializer)-1;
 969                                 const ir_initializer_t *last
 970                                         = get_initializer_compound_value(initializer, l);
 971                                 const ir_entity *last_ent  = get_compound_member(type, l);
 972                                 ir_type         *last_type = get_entity_type(last_ent);
 973                                 assert(is_array_variable_size(last_type));
 974                                 size += get_initializer_size(last, last_type);
 975                         }
 976                         return size;
 977                 }
 978         }
 979
 980         panic("found invalid initializer");
 981 }
 982
 983 #ifndef NDEBUG
 984 static normal_or_bitfield *glob_vals;
 985 static size_t              max_vals;
 986 #endif
 987
 988 static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits,
 989                           const ir_initializer_t *initializer, ir_type *type)
 990 {
 991         static const size_t BITS_PER_BYTE = 8;
 992         ir_mode   *mode      = get_type_mode(type);
 993         ir_tarval *tv        = NULL;
 994         int        value_len;
 995         size_t     bit_offset;
 996         size_t     end;
 997         bool       big_endian = be_get_backend_param()->byte_order_big_endian;
 998
 999         switch (get_initializer_kind(initializer)) {
1000         case IR_INITIALIZER_NULL:
1001                 return;
1002         case IR_INITIALIZER_TARVAL:
1003                 tv = get_initializer_tarval_value(initializer);
1004                 break;
1005         case IR_INITIALIZER_CONST: {
1006                 ir_node *node = get_initializer_const_value(initializer);
1007                 if (!is_Const(node)) {
1008                         panic("bitfield initializer not a Const node");
1009                 }
1010                 tv = get_Const_tarval(node);
1011                 break;
1012         }
1013         case IR_INITIALIZER_COMPOUND:
1014                 panic("bitfield initializer is compound");
1015         }
1016         if (tv == NULL) {
1017                 panic("Couldn't get numeric value for bitfield initializer");
1018         }
1019         tv = tarval_convert_to(tv, get_type_mode(type));
1020
1021         value_len  = get_type_size_bytes(get_primitive_base_type(type));
1022         bit_offset = 0;
1023         end        = get_mode_size_bits(mode);
1024         while (bit_offset < end) {
1025                 size_t        src_offset      = bit_offset / BITS_PER_BYTE;
1026                 size_t        src_offset_bits = bit_offset % BITS_PER_BYTE;
1027                 size_t        dst_offset      = (bit_offset+offset_bits) / BITS_PER_BYTE;
1028                 size_t        dst_offset_bits = (bit_offset+offset_bits) % BITS_PER_BYTE;
1029                 size_t        src_bits_len    = end-bit_offset;
1030                 size_t        dst_bits_len    = BITS_PER_BYTE-dst_offset_bits;
1031                 unsigned char curr_bits;
1032                 normal_or_bitfield *val;
1033                 if (src_bits_len > dst_bits_len)
1034                         src_bits_len = dst_bits_len;
1035
1036                 if (big_endian) {
1037                         val = &vals[value_len - dst_offset - 1];
1038                 } else {
1039                         val = &vals[dst_offset];
1040                 }
1041
1042                 assert((val-glob_vals) < (ptrdiff_t) max_vals);
1043                 assert(val->kind == BITFIELD ||
1044                                 (val->kind == NORMAL && val->v.value == NULL));
1045                 val->kind  = BITFIELD;
1046                 curr_bits  = get_tarval_sub_bits(tv, src_offset);
1047                 curr_bits  = curr_bits >> src_offset_bits;
1048                 if (src_offset_bits + src_bits_len > 8) {
1049                         unsigned next_bits = get_tarval_sub_bits(tv, src_offset+1);
1050                         curr_bits |= next_bits << (8 - src_offset_bits);
1051                 }
1052                 curr_bits &= (1 << src_bits_len) - 1;
1053                 val->v.bf_val |= curr_bits << dst_offset_bits;
1054
1055                 bit_offset += dst_bits_len;
1056         }
1057 }
1058
1059 static void emit_ir_initializer(normal_or_bitfield *vals,
1060                                 const ir_initializer_t *initializer,
1061                                 ir_type *type)
1062 {
1063         assert((size_t) (vals - glob_vals) < max_vals);
1064
1065         if (initializer_is_string_const(initializer)) {
1066                 assert(vals->kind != BITFIELD);
1067                 vals->kind     = STRING;
1068                 vals->v.string = initializer;
1069                 return;
1070         }
1071
1072         switch (get_initializer_kind(initializer)) {
1073         case IR_INITIALIZER_NULL:
1074                 return;
1075         case IR_INITIALIZER_TARVAL: {
1076                 size_t i;
1077
1078                 assert(vals->kind != BITFIELD);
1079                 vals->kind     = TARVAL;
1080                 vals->type     = type;
1081                 vals->v.tarval = get_initializer_tarval_value(initializer);
1082                 assert(get_type_mode(type) == get_tarval_mode(vals->v.tarval));
1083                 for (i = 1; i < get_type_size_bytes(type); ++i) {
1084                         vals[i].kind    = NORMAL;
1085                         vals[i].type    = NULL;
1086                         vals[i].v.value = NULL;
1087                 }
1088                 return;
1089         }
1090         case IR_INITIALIZER_CONST: {
1091                 size_t i;
1092
1093                 assert(vals->kind != BITFIELD);
1094                 vals->kind    = NORMAL;
1095                 vals->type    = type;
1096                 vals->v.value = get_initializer_const_value(initializer);
1097                 for (i = 1; i < get_type_size_bytes(type); ++i) {
1098                         vals[i].kind    = NORMAL;
1099                         vals[i].type    = NULL;
1100                         vals[i].v.value = NULL;
1101                 }
1102                 return;
1103         }
1104         case IR_INITIALIZER_COMPOUND: {
1105                 size_t i = 0;
1106                 size_t n = get_initializer_compound_n_entries(initializer);
1107
1108                 if (is_Array_type(type)) {
1109                         ir_type *element_type = get_array_element_type(type);
1110                         size_t   skip         = get_type_size_bytes(element_type);
1111                         size_t   alignment    = get_type_alignment_bytes(element_type);
1112                         size_t   misalign     = skip % alignment;
1113                         if (misalign != 0) {
1114                                 skip += alignment - misalign;
1115                         }
1116
1117                         for (i = 0; i < n; ++i) {
1118                                 ir_initializer_t *sub_initializer
1119                                         = get_initializer_compound_value(initializer, i);
1120
1121                                 emit_ir_initializer(vals, sub_initializer, element_type);
1122
1123                                 vals += skip;
1124                         }
1125                 } else {
1126                         size_t n_members, i;
1127                         assert(is_compound_type(type));
1128                         n_members = get_compound_n_members(type);
1129                         for (i = 0; i < n_members; ++i) {
1130                                 ir_entity        *member    = get_compound_member(type, i);
1131                                 size_t            offset    = get_entity_offset(member);
1132                                 ir_type          *subtype   = get_entity_type(member);
1133                                 ir_mode          *mode      = get_type_mode(subtype);
1134                                 ir_initializer_t *sub_initializer;
1135
1136                                 assert(i < get_initializer_compound_n_entries(initializer));
1137                                 sub_initializer
1138                                         = get_initializer_compound_value(initializer, i);
1139
1140                                 if (mode != NULL) {
1141                                         size_t offset_bits
1142                                                 = get_entity_offset_bits_remainder(member);
1143
1144                                         if (is_Primitive_type(subtype)
1145                                                         && get_primitive_base_type(subtype) != NULL) {
1146                                                 emit_bitfield(&vals[offset], offset_bits,
1147                                                               sub_initializer, subtype);
1148                                                 continue;
1149                                         } else {
1150                                                 assert(offset_bits == 0);
1151                                         }
1152                                 }
1153
1154                                 emit_ir_initializer(&vals[offset], sub_initializer, subtype);
1155                         }
1156                 }
1157
1158                 return;
1159         }
1160         }
1161         panic("invalid ir_initializer kind found");
1162 }
1163
1164 static void emit_tarval_data(ir_type *type, ir_tarval *tv)
1165 {
1166         size_t size = get_type_size_bytes(type);
1167         if (size == 12) {
1168                 /* this should be an x86 extended float */
1169                 assert(be_get_backend_param()->byte_order_big_endian == 0);
1170
1171                 /* Beware: Mixed endian output!  One little endian number emitted as
1172                  * three longs.  Each long initializer is written in big endian. */
1173                 be_emit_irprintf(
1174                         "\t.long\t0x%02x%02x%02x%02x\n"
1175                         "\t.long\t0x%02x%02x%02x%02x\n"
1176                         "\t.long\t0x%02x%02x%02x%02x\n",
1177                         get_tarval_sub_bits(tv,  3), get_tarval_sub_bits(tv,  2),
1178                         get_tarval_sub_bits(tv,  1), get_tarval_sub_bits(tv,  0),
1179                         get_tarval_sub_bits(tv,  7), get_tarval_sub_bits(tv,  6),
1180                         get_tarval_sub_bits(tv,  5), get_tarval_sub_bits(tv,  4),
1181                         get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1182                         get_tarval_sub_bits(tv,  9), get_tarval_sub_bits(tv,  8)
1183                 );
1184                 be_emit_write_line();
1185         } else if (size == 16) {
1186                 if (be_get_backend_param()->byte_order_big_endian) {
1187                         be_emit_irprintf(
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                                 "\t.long\t0x%02x%02x%02x%02x\n",
1192                                 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
1193                                 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12),
1194                                 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1195                                 get_tarval_sub_bits(tv,  9), get_tarval_sub_bits(tv,  8),
1196                                 get_tarval_sub_bits(tv,  7), get_tarval_sub_bits(tv,  6),
1197                                 get_tarval_sub_bits(tv,  5), get_tarval_sub_bits(tv,  4),
1198                                 get_tarval_sub_bits(tv,  3), get_tarval_sub_bits(tv,  2),
1199                                 get_tarval_sub_bits(tv,  1), get_tarval_sub_bits(tv,  0)
1200                         );
1201                 } else {
1202                         /* Beware: Mixed endian output! One little endian number emitted as
1203                          * three longs.  Each long initializer is written in big endian. */
1204                         be_emit_irprintf(
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                                 "\t.long\t0x%02x%02x%02x%02x\n",
1209                                 get_tarval_sub_bits(tv,  3), get_tarval_sub_bits(tv,  2),
1210                                 get_tarval_sub_bits(tv,  1), get_tarval_sub_bits(tv,  0),
1211                                 get_tarval_sub_bits(tv,  7), get_tarval_sub_bits(tv,  6),
1212                                 get_tarval_sub_bits(tv,  5), get_tarval_sub_bits(tv,  4),
1213                                 get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
1214                                 get_tarval_sub_bits(tv,  9), get_tarval_sub_bits(tv,  8),
1215                                 get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 14),
1216                                 get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12)
1217                         );
1218                 }
1219                 be_emit_write_line();
1220                 return;
1221         } else {
1222                 /* default case */
1223                 emit_size_type(size);
1224                 emit_arith_tarval(tv, size);
1225                 be_emit_char('\n');
1226                 be_emit_write_line();
1227         }
1228 }
1229
1230 /**
1231  * Emit an atomic value.
1232  *
1233  * @param env   the gas output environment
1234  * @param init  a node representing the atomic value (on the const code irg)
1235  */
1236 static void emit_node_data(be_gas_decl_env_t *env, ir_node *init, ir_type *type)
1237 {
1238         size_t size = get_type_size_bytes(type);
1239         if (size == 12 || size == 16) {
1240                 ir_tarval *tv;
1241                 if (!is_Const(init)) {
1242                         panic("12/16byte initializers only support Const nodes yet");
1243                 }
1244                 tv = get_Const_tarval(init);
1245                 emit_tarval_data(type, tv);
1246                 return;
1247         }
1248
1249         emit_size_type(size);
1250         emit_init_expression(env, init);
1251         be_emit_char('\n');
1252         be_emit_write_line();
1253 }
1254
1255 static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity)
1256 {
1257         const ir_initializer_t *initializer = entity->initializer;
1258         ir_type                *type;
1259         normal_or_bitfield     *vals;
1260         size_t                  size;
1261         size_t                  k;
1262
1263         if (initializer_is_string_const(initializer)) {
1264                 emit_string_initializer(initializer);
1265                 return;
1266         }
1267
1268         type = get_entity_type(entity);
1269         size = get_initializer_size(initializer, type);
1270
1271         if (size == 0)
1272                 return;
1273
1274         /*
1275          * In the worst case, every initializer allocates one byte.
1276          * Moreover, initializer might be big, do not allocate on stack.
1277          */
1278         vals = XMALLOCNZ(normal_or_bitfield, size);
1279
1280 #ifndef NDEBUG
1281         glob_vals = vals;
1282         max_vals  = size;
1283 #endif
1284
1285         emit_ir_initializer(vals, initializer, type);
1286
1287         /* now write values sorted */
1288         for (k = 0; k < size; ) {
1289                 int                     space     = 0;
1290                 normal_or_bitfield_kind kind      = vals[k].kind;
1291                 int                     elem_size;
1292                 switch (kind) {
1293                 case NORMAL:
1294                         if (vals[k].v.value != NULL) {
1295                                 emit_node_data(env, vals[k].v.value, vals[k].type);
1296                                 elem_size = get_type_size_bytes(vals[k].type);
1297                         } else {
1298                                 elem_size = 0;
1299                         }
1300                         break;
1301                 case TARVAL:
1302                         emit_tarval_data(vals[k].type, vals[k].v.tarval);
1303                         elem_size = get_type_size_bytes(vals[k].type);
1304                         break;
1305                 case STRING:
1306                         elem_size = emit_string_initializer(vals[k].v.string);
1307                         break;
1308                 case BITFIELD:
1309                         be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1310                         be_emit_write_line();
1311                         elem_size = 1;
1312                         break;
1313                 default:
1314                         panic("internal compiler error (invalid normal_or_bitfield_kind");
1315                 }
1316
1317                 k += elem_size;
1318                 while (k < size && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1319                         ++space;
1320                         ++k;
1321                 }
1322
1323                 /* a gap */
1324                 if (space > 0) {
1325                         be_emit_irprintf("\t.space\t%d, 0\n", space);
1326                         be_emit_write_line();
1327                 }
1328         }
1329         xfree(vals);
1330 }
1331
1332 static void emit_compound_graph_init(be_gas_decl_env_t *env,
1333                                      const ir_entity *ent)
1334 {
1335         normal_or_bitfield *vals;
1336         int i, j, n;
1337         unsigned k, last_ofs;
1338
1339         if (entity_is_string_const(ent)) {
1340                 emit_string_cst(ent);
1341                 return;
1342         }
1343
1344         n = get_compound_ent_n_values(ent);
1345
1346         /* Find the initializer size. Sorrily gcc support a nasty feature:
1347            The last field of a compound may be a flexible array. This allows
1348            initializers bigger than the type size. */
1349         last_ofs = get_type_size_bytes(get_entity_type(ent));
1350         for (i = 0; i < n; ++i) {
1351                 unsigned offset         = get_compound_ent_value_offset_bytes(ent, i);
1352                 unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i);
1353                 ir_node  *value         = get_compound_ent_value(ent, i);
1354                 unsigned value_len      = get_mode_size_bits(get_irn_mode(value));
1355
1356                 offset += (value_len + bits_remainder + 7) >> 3;
1357
1358                 if (offset > last_ofs) {
1359                         last_ofs = offset;
1360                 }
1361         }
1362
1363         /*
1364          * In the worst case, every initializer allocates one byte.
1365          * Moreover, initializer might be big, do not allocate on stack.
1366          */
1367         vals = XMALLOCNZ(normal_or_bitfield, last_ofs);
1368
1369         /* collect the values and store them at the offsets */
1370         for (i = 0; i < n; ++i) {
1371                 unsigned offset      = get_compound_ent_value_offset_bytes(ent, i);
1372                 int      offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i);
1373                 ir_node  *value      = get_compound_ent_value(ent, i);
1374                 int      value_len   = get_mode_size_bits(get_irn_mode(value));
1375
1376                 assert(offset_bits >= 0);
1377
1378                 if (offset_bits != 0 ||
1379                                 (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
1380                         ir_tarval *tv = get_atomic_init_tv(value);
1381                         unsigned char curr_bits, last_bits = 0;
1382                         if (tv == NULL) {
1383                                 panic("Couldn't get numeric value for bitfield initializer '%s'",
1384                                                 get_entity_ld_name(ent));
1385                         }
1386                         /* normalize offset */
1387                         offset += offset_bits >> 3;
1388                         offset_bits &= 7;
1389
1390                         for (j = 0; value_len + offset_bits > 0; ++j) {
1391                                 assert(offset + j < last_ofs);
1392                                 assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);
1393                                 vals[offset + j].kind = BITFIELD;
1394                                 curr_bits = get_tarval_sub_bits(tv, j);
1395                                 vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
1396                                 value_len -= 8;
1397                                 last_bits = curr_bits;
1398                         }
1399                 } else {
1400                         int i;
1401
1402                         assert(offset < last_ofs);
1403                         assert(vals[offset].kind == NORMAL);
1404                         for (i = 1; i < value_len / 8; ++i) {
1405                                 assert(vals[offset + i].v.value == NULL);
1406                         }
1407                         vals[offset].v.value = value;
1408                 }
1409         }
1410
1411         /* now write them sorted */
1412         for (k = 0; k < last_ofs; ) {
1413                 int space = 0, skip = 0;
1414                 if (vals[k].kind == NORMAL) {
1415                         if (vals[k].v.value != NULL) {
1416                                 emit_node_data(env, vals[k].v.value, vals[k].type);
1417                                 skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1;
1418                         } else {
1419                                 space = 1;
1420                         }
1421                 } else {
1422                         assert(vals[k].kind == BITFIELD);
1423                         be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1424                 }
1425
1426                 ++k;
1427                 while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1428                         ++space;
1429                         ++k;
1430                 }
1431                 space -= skip;
1432                 assert(space >= 0);
1433
1434                 /* a gap */
1435                 if (space > 0) {
1436                         be_emit_irprintf("\t.space\t%d, 0\n", space);
1437                         be_emit_write_line();
1438                 }
1439         }
1440         xfree(vals);
1441 }
1442
1443 static void emit_align(unsigned p2alignment)
1444 {
1445         be_emit_irprintf("\t.p2align\t%u\n", log2_floor(p2alignment));
1446         be_emit_write_line();
1447 }
1448
1449 static unsigned get_effective_entity_alignment(const ir_entity *entity)
1450 {
1451         unsigned alignment = get_entity_alignment(entity);
1452         if (alignment == 0) {
1453                 ir_type *type = get_entity_type(entity);
1454                 alignment     = get_type_alignment_bytes(type);
1455         }
1456         return alignment;
1457 }
1458
1459 static void emit_common(const ir_entity *entity)
1460 {
1461         unsigned size      = get_type_size_bytes(get_entity_type(entity));
1462         unsigned alignment = get_effective_entity_alignment(entity);
1463
1464         if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1465                 emit_weak(entity);
1466         }
1467
1468         switch (be_gas_object_file_format) {
1469         case OBJECT_FILE_FORMAT_MACH_O:
1470                 be_emit_cstring("\t.comm ");
1471                 be_gas_emit_entity(entity);
1472                 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1473                 be_emit_write_line();
1474                 return;
1475         case OBJECT_FILE_FORMAT_ELF:
1476                 be_emit_cstring("\t.comm ");
1477                 be_gas_emit_entity(entity);
1478                 be_emit_irprintf(",%u,%u\n", size, alignment);
1479                 be_emit_write_line();
1480                 return;
1481         case OBJECT_FILE_FORMAT_COFF:
1482                 be_emit_cstring("\t.comm ");
1483                 be_gas_emit_entity(entity);
1484                 be_emit_irprintf(",%u # %u\n", size, alignment);
1485                 be_emit_write_line();
1486                 return;
1487         }
1488         panic("invalid object file format");
1489 }
1490
1491 static void emit_local_common(const ir_entity *entity)
1492 {
1493         unsigned size      = get_type_size_bytes(get_entity_type(entity));
1494         unsigned alignment = get_effective_entity_alignment(entity);
1495
1496         if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) {
1497                 emit_weak(entity);
1498         }
1499
1500         switch (be_gas_object_file_format) {
1501         case OBJECT_FILE_FORMAT_MACH_O:
1502                 be_emit_cstring("\t.lcomm ");
1503                 be_gas_emit_entity(entity);
1504                 be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment));
1505                 be_emit_write_line();
1506                 return;
1507         case OBJECT_FILE_FORMAT_ELF:
1508                 be_emit_cstring("\t.local ");
1509                 be_gas_emit_entity(entity);
1510                 be_emit_cstring("\n");
1511                 be_emit_write_line();
1512                 be_emit_cstring("\t.comm ");
1513                 be_gas_emit_entity(entity);
1514                 be_emit_irprintf(",%u,%u\n", size, alignment);
1515                 be_emit_write_line();
1516                 return;
1517         case OBJECT_FILE_FORMAT_COFF:
1518                 be_emit_cstring("\t.lcomm ");
1519                 be_gas_emit_entity(entity);
1520                 be_emit_irprintf(",%u # %u\n", size, alignment);
1521                 be_emit_write_line();
1522                 return;
1523         }
1524         panic("invalid object file format");
1525 }
1526
1527 static void emit_indirect_symbol(const ir_entity *entity, be_gas_section_t section)
1528 {
1529         /* we can only do PIC code on macho so far */
1530         assert(be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O);
1531
1532         be_gas_emit_entity(entity);
1533         be_emit_cstring(":\n");
1534         be_emit_write_line();
1535         be_emit_irprintf("\t.indirect_symbol %I\n", get_entity_ident(entity));
1536         be_emit_write_line();
1537         if (section == GAS_SECTION_PIC_TRAMPOLINES) {
1538                 be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
1539                 be_emit_write_line();
1540         } else {
1541                 assert(section == GAS_SECTION_PIC_SYMBOLS);
1542                 be_emit_cstring("\t.long 0\n");
1543                 be_emit_write_line();
1544         }
1545 }
1546
1547 char const *be_gas_get_private_prefix(void)
1548 {
1549         return be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O ? "L" : ".L";
1550 }
1551
1552 void be_gas_emit_entity(const ir_entity *entity)
1553 {
1554         if (entity->type == get_code_type()) {
1555                 ir_label_t label = get_entity_label(entity);
1556                 be_emit_irprintf("%s_%lu", be_gas_get_private_prefix(), label);
1557                 return;
1558         }
1559
1560         if (get_entity_visibility(entity) == ir_visibility_private) {
1561                 be_emit_string(be_gas_get_private_prefix());
1562         }
1563         be_emit_irprintf("%I", get_entity_ld_ident(entity));
1564 }
1565
1566 void be_gas_emit_block_name(const ir_node *block)
1567 {
1568         ir_entity *entity = get_Block_entity(block);
1569         if (entity != NULL) {
1570                 be_gas_emit_entity(entity);
1571         } else {
1572                 void *nr_val = pmap_get(block_numbers, block);
1573                 int   nr;
1574                 if (nr_val == NULL) {
1575                         nr = next_block_nr++;
1576                         pmap_insert(block_numbers, block, INT_TO_PTR(nr+1));
1577                 } else {
1578                         nr = PTR_TO_INT(nr_val)-1;
1579                 }
1580                 be_emit_irprintf("%s%d", be_gas_get_private_prefix(), nr);
1581         }
1582 }
1583
1584 void be_gas_begin_block(const ir_node *block, bool needs_label)
1585 {
1586         if (needs_label) {
1587                 be_gas_emit_block_name(block);
1588                 be_emit_char(':');
1589         } else {
1590                 if (!be_options.verbose_asm)
1591                         return;
1592                 be_emit_cstring("/*");
1593                 be_gas_emit_block_name(block);
1594                 be_emit_cstring(":*/");
1595         }
1596
1597         if (be_options.verbose_asm) {
1598                 int           arity;
1599                 ir_graph     *irg       = get_irn_irg(block);
1600                 ir_exec_freq *exec_freq = be_get_irg_exec_freq(irg);
1601
1602                 be_emit_pad_comment();
1603                 be_emit_cstring("/* preds:");
1604
1605                 arity = get_irn_arity(block);
1606                 if (arity == 0) {
1607                         be_emit_cstring(" none");
1608                 } else {
1609                         int i;
1610                         for (i = 0; i < arity; ++i) {
1611                                 ir_node *predblock = get_Block_cfgpred_block(block, i);
1612                                 be_emit_char(' ');
1613                                 be_gas_emit_block_name(predblock);
1614                         }
1615                 }
1616                 if (exec_freq != NULL) {
1617                         be_emit_irprintf(", freq: %.3f",
1618                                          get_block_execfreq(exec_freq, block));
1619                 }
1620                 be_emit_cstring(" */");
1621         }
1622         be_emit_char('\n');
1623         be_emit_write_line();
1624 }
1625
1626 /**
1627  * Dump a global entity.
1628  *
1629  * @param env  the gas output environment
1630  * @param ent  the entity to be dumped
1631  */
1632 static void emit_global(be_gas_decl_env_t *env, const ir_entity *entity)
1633 {
1634         ir_type          *type       = get_entity_type(entity);
1635         ident            *ld_ident   = get_entity_ld_ident(entity);
1636         unsigned          alignment  = get_effective_entity_alignment(entity);
1637         be_gas_section_t  section    = determine_section(env, entity);
1638         ir_visibility     visibility = get_entity_visibility(entity);
1639         ir_linkage        linkage    = get_entity_linkage(entity);
1640
1641         /* Block labels are already emitted in the code. */
1642         if (type == get_code_type())
1643                 return;
1644
1645         /* we already emitted all methods with graphs in other functions like
1646          * be_gas_emit_function_prolog(). All others don't need to be emitted.
1647          */
1648         if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) {
1649                 return;
1650         }
1651
1652         be_dwarf_variable(entity);
1653
1654         if (section == GAS_SECTION_BSS) {
1655                 switch (visibility) {
1656                 case ir_visibility_local:
1657                 case ir_visibility_private:
1658                         emit_local_common(entity);
1659                         return;
1660                 case ir_visibility_external:
1661                         if (linkage & IR_LINKAGE_MERGE) {
1662                                 emit_common(entity);
1663                                 return;
1664                         }
1665                         break;
1666                 }
1667         }
1668
1669         emit_visibility(entity);
1670
1671         if (!is_po2(alignment))
1672                 panic("alignment not a power of 2");
1673
1674         emit_section(section, entity);
1675
1676         if (section == GAS_SECTION_PIC_TRAMPOLINES
1677                         || section == GAS_SECTION_PIC_SYMBOLS) {
1678                 emit_indirect_symbol(entity, section);
1679                 return;
1680         }
1681
1682         /* nothing left to do without an initializer */
1683         if (!entity_has_definition(entity))
1684                 return;
1685
1686         /* alignment */
1687         if (alignment > 1) {
1688                 emit_align(alignment);
1689         }
1690         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF
1691                         && be_gas_emit_types
1692                         && visibility != ir_visibility_private) {
1693                 be_emit_cstring("\t.type\t");
1694                 be_gas_emit_entity(entity);
1695                 be_emit_cstring(", ");
1696                 be_emit_char(be_gas_elf_type_char);
1697                 be_emit_cstring("object\n\t.size\t");\
1698                 be_gas_emit_entity(entity);
1699                 be_emit_irprintf(", %u\n", get_type_size_bytes(type));
1700         }
1701
1702         if (get_id_str(ld_ident)[0] != '\0') {
1703                 be_gas_emit_entity(entity);
1704                 be_emit_cstring(":\n");
1705                 be_emit_write_line();
1706         }
1707
1708         if (entity_is_null(entity)) {
1709                 /* we should use .space for stuff in the bss segment */
1710                 unsigned size = get_type_size_bytes(type);
1711                 if (size > 0) {
1712                         be_emit_irprintf("\t.space %u, 0\n", get_type_size_bytes(type));
1713                         be_emit_write_line();
1714                 }
1715         } else if (entity_has_compound_ent_values(entity)) {
1716                 emit_compound_graph_init(env, entity);
1717         } else {
1718                 assert(entity->initializer != NULL);
1719                 emit_initializer(env, entity);
1720         }
1721 }
1722
1723 /**
1724  * Dumps declarations of global variables and the initialization code.
1725  *
1726  * @param gt                a global like type, either the global or the TLS one
1727  * @param env               an environment
1728  */
1729 static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env)
1730 {
1731         size_t i, n = get_compound_n_members(gt);
1732
1733         for (i = 0; i < n; i++) {
1734                 ir_entity *ent = get_compound_member(gt, i);
1735                 emit_global(env, ent);
1736         }
1737 }
1738
1739 /* Generate all entities. */
1740 static void emit_global_decls(const be_main_env_t *main_env)
1741 {
1742         be_gas_decl_env_t env;
1743         memset(&env, 0, sizeof(env));
1744
1745         /* dump global type */
1746         env.main_env = main_env;
1747         env.section  = (be_gas_section_t) -1;
1748
1749         be_gas_emit_globals(get_glob_type(), &env);
1750         be_gas_emit_globals(get_tls_type(), &env);
1751         be_gas_emit_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env);
1752         be_gas_emit_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env);
1753         be_gas_emit_globals(main_env->pic_symbols_type, &env);
1754         be_gas_emit_globals(main_env->pic_trampolines_type, &env);
1755
1756         /**
1757          * ".subsections_via_symbols marks object files which are OK to divide
1758          * their section contents into individual blocks".
1759          * From my understanding this means no label points in the middle of an
1760          * object which we want to address as a whole. Firm code should be fine
1761          * with this.
1762          */
1763         if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) {
1764                 be_emit_cstring("\t.subsections_via_symbols\n");
1765                 be_emit_write_line();
1766         }
1767 }
1768
1769 void be_emit_jump_table(const ir_node *node, const ir_switch_table *table,
1770                         ir_entity *entity, get_cfop_target_func get_cfop_target)
1771 {
1772         unsigned          n_outs    = arch_get_irn_n_outs(node);
1773         const ir_node   **targets   = XMALLOCNZ(const ir_node*, n_outs);
1774         size_t            n_entries = ir_switch_table_get_n_entries(table);
1775         unsigned long     length    = 0;
1776         size_t            e;
1777         const ir_edge_t  *edge;
1778         unsigned          i;
1779         const ir_node   **labels;
1780
1781         /* go over all proj's and collect their jump targets */
1782         foreach_out_edge(node, edge) {
1783                 ir_node *proj   = get_edge_src_irn(edge);
1784                 long     pn     = get_Proj_proj(proj);
1785                 ir_node *target = get_cfop_target(proj);
1786                 assert(targets[pn] == NULL);
1787                 targets[pn] = target;
1788         }
1789
1790         /* go over table to determine max value (note that we normalized the
1791          * ranges so that the minimum is 0) */
1792         for (e = 0; e < n_entries; ++e) {
1793                 const ir_switch_table_entry *entry
1794                         = ir_switch_table_get_entry_const(table, e);
1795                 ir_tarval *max = entry->max;
1796                 unsigned long val;
1797                 if (entry->pn == 0)
1798                         continue;
1799                 if (!tarval_is_long(max))
1800                         panic("switch case overflow (%+F)", node);
1801                 val = (unsigned long) get_tarval_long(max);
1802                 if (val > length) {
1803                         length = val;
1804                 }
1805         }
1806
1807         /* the 16000 isn't a real limit of the architecture. But should protect us
1808          * from seamingly endless compiler runs */
1809         if (length > 16000) {
1810                 /* switch lowerer should have broken this monster to pieces... */
1811                 panic("too large switch encountered (%+F)", node);
1812         }
1813         ++length;
1814
1815         labels = XMALLOCNZ(const ir_node*, length);
1816         for (e = 0; e < n_entries; ++e) {
1817                 const ir_switch_table_entry *entry
1818                         = ir_switch_table_get_entry_const(table, e);
1819                 ir_tarval     *min    = entry->min;
1820                 ir_tarval     *max    = entry->max;
1821                 const ir_node *target = targets[entry->pn];
1822                 assert(entry->pn < (long)n_outs);
1823                 if (min == max) {
1824                         unsigned long val = (unsigned long)get_tarval_long(max);
1825                         labels[val] = target;
1826                 } else {
1827                         unsigned long min_val;
1828                         unsigned long max_val;
1829                         unsigned long i;
1830                         if (!tarval_is_long(min))
1831                                 panic("switch case overflow (%+F)", node);
1832                         min_val = (unsigned long)get_tarval_long(min);
1833                         max_val = (unsigned long)get_tarval_long(max);
1834                         assert(min_val <= max_val);
1835                         for (i = min_val; i <= max_val; ++i) {
1836                                 labels[i] = target;
1837                         }
1838                 }
1839         }
1840
1841         /* emit table */
1842         if (entity != NULL) {
1843                 be_gas_emit_switch_section(GAS_SECTION_RODATA);
1844                 be_emit_cstring("\t.align 4\n");
1845                 be_gas_emit_entity(entity);
1846                 be_emit_cstring(":\n");
1847         }
1848
1849         for (i = 0; i < length; ++i) {
1850                 const ir_node *block = labels[i];
1851                 if (block == NULL)
1852                         block = targets[0];
1853                 be_emit_cstring("\t.long ");
1854                 be_gas_emit_block_name(block);
1855                 be_emit_char('\n');
1856                 be_emit_write_line();
1857         }
1858
1859         if (entity != NULL)
1860                 be_gas_emit_switch_section(GAS_SECTION_TEXT);
1861
1862         xfree(labels);
1863         xfree(targets);
1864 }
1865
1866 static void emit_global_asms(void)
1867 {
1868         size_t n = get_irp_n_asms();
1869         size_t i;
1870
1871         be_gas_emit_switch_section(GAS_SECTION_TEXT);
1872         for (i = 0; i < n; ++i) {
1873                 ident *asmtext = get_irp_asm(i);
1874
1875                 be_emit_cstring("#APP\n");
1876                 be_emit_write_line();
1877                 be_emit_irprintf("%I\n", asmtext);
1878                 be_emit_write_line();
1879                 be_emit_cstring("#NO_APP\n");
1880                 be_emit_write_line();
1881         }
1882 }
1883
1884 void be_gas_begin_compilation_unit(const be_main_env_t *env)
1885 {
1886         be_dwarf_open();
1887         be_dwarf_unit_begin(env->cup_name);
1888
1889         block_numbers = pmap_create();
1890         next_block_nr = 0;
1891
1892         emit_global_asms();
1893 }
1894
1895 void be_gas_end_compilation_unit(const be_main_env_t *env)
1896 {
1897         emit_global_decls(env);
1898
1899         pmap_destroy(block_numbers);
1900
1901         be_dwarf_unit_end();
1902         be_dwarf_close();
1903 }