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

   1 /*
   2  * Copyright (C) 1995-2008 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  * @version     $Id$
  26  */
  27 #include "config.h"
  28
  29 #include "begnuas.h"
  30
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <ctype.h>
  34 #include <assert.h>
  35
  36 #include "obst.h"
  37 #include "tv.h"
  38 #include "irnode.h"
  39 #include "irprog.h"
  40 #include "pdeq.h"
  41 #include "entity_t.h"
  42 #include "error.h"
  43
  44 #include "be_t.h"
  45 #include "beemitter.h"
  46 #include "be_dbgout.h"
  47
  48 /** by default, we generate assembler code for the Linux gas */
  49 be_gas_flavour_t be_gas_flavour       = GAS_FLAVOUR_ELF;
  50 char             be_gas_elf_type_char = '@';
  51 bool             be_gas_emit_types    = true;
  52
  53 static be_gas_section_t current_section = (be_gas_section_t) -1;
  54
  55 /**
  56  * Return the pseudo-instruction to be issued for a section switch
  57  * depending on the current flavour.
  58  *
  59  * @param section  the section to switch to
  60  *
  61  * @return  the pseudo-instruction
  62  */
  63 static const char *get_section_name(be_gas_section_t section) {
  64         static const char *text[GAS_FLAVOUR_LAST+1][GAS_SECTION_LAST+1] = {
  65                 { /* GAS_FLAVOUR_ELF */
  66                         ".section\t.text",
  67                         ".section\t.data",
  68                         ".section\t.rodata",
  69                         ".section\t.bss",
  70                         ".section\t.tbss,\"awT\",@nobits",
  71                         ".section\t.ctors,\"aw\",@progbits",
  72                         ".section\t.dtors,\"aw\",@progbits",
  73                         NULL, /* no cstring section */
  74                         NULL,
  75                         NULL
  76                 },
  77                 { /* GAS_FLAVOUR_MINGW */
  78                         ".section\t.text",
  79                         ".section\t.data",
  80                         ".section .rdata,\"dr\"",
  81                         ".section\t.bss",
  82                         ".section\t.tbss,\"awT\",@nobits",
  83                         ".section\t.ctors,\"w\"",
  84                         ".section\t.dtors,\"w\"",
  85                         NULL,
  86                         NULL,
  87                         NULL
  88                 },
  89                 { /* GAS_FLAVOUR_YASM */
  90                         ".section\t.text",
  91                         ".section\t.data",
  92                         ".section\t.rodata",
  93                         ".section\t.bss",
  94                         ".section\t.tbss,\"awT\",@nobits",
  95                         ".section\t.ctors,\"aw\",@progbits",
  96                         ".section\t.dtors,\"aw\",@progbits",
  97                         NULL,
  98                         NULL,
  99                         NULL
 100                 },
 101                 { /* GAS_FLAVOUR_MACH_O */
 102                         ".text",
 103                         ".data",
 104                         ".const",
 105                         ".data",
 106                         NULL,             /* TLS is not supported on Mach-O */
 107                         ".mod_init_func",
 108                         NULL,             /* TODO: how is this called? */
 109                         ".cstring",
 110                         ".section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5",
 111                         ".section\t__IMPORT,__pointers,non_lazy_symbol_pointers"
 112                 }
 113         };
 114
 115         assert((int) be_gas_flavour >= 0 && be_gas_flavour <= GAS_FLAVOUR_LAST);
 116         assert((int) section >= 0 && section <= GAS_SECTION_LAST);
 117         return text[be_gas_flavour][section];
 118 }
 119
 120 void be_gas_emit_switch_section(be_gas_section_t section) {
 121         if (current_section == section)
 122                 return;
 123
 124         be_emit_char('\t');
 125         be_emit_string(get_section_name(section));
 126         be_emit_char('\n');
 127         be_emit_write_line();
 128         current_section = section;
 129 }
 130
 131 void be_gas_emit_function_prolog(ir_entity *entity, unsigned po2alignment)
 132 {
 133         const char *name = get_entity_ld_name(entity);
 134         const char *fill_byte = "";
 135         unsigned    maximum_skip;
 136
 137         be_gas_emit_switch_section(GAS_SECTION_TEXT);
 138
 139         /* write the begin line (used by scripts processing the assembler... */
 140         be_emit_write_line();
 141         be_emit_cstring("# -- Begin  ");
 142         be_emit_string(name);
 143         be_emit_char('\n');
 144         be_emit_write_line();
 145
 146         /* gcc fills space between function with 0x90, no idea if this is needed */
 147         if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
 148                 fill_byte = "0x90";
 149         }
 150
 151         if (po2alignment > 0) {
 152                 maximum_skip = (1 << po2alignment) - 1;
 153                 be_emit_cstring("\t.p2align ");
 154                 be_emit_irprintf("%u,%s,%u\n", po2alignment, fill_byte, maximum_skip);
 155                 be_emit_write_line();
 156         }
 157         if (get_entity_visibility(entity) == visibility_external_visible) {
 158                 be_emit_cstring(".globl ");
 159                 be_emit_string(name);
 160                 be_emit_char('\n');
 161                 be_emit_write_line();
 162         }
 163
 164         switch (be_gas_flavour) {
 165         case GAS_FLAVOUR_ELF:
 166                 be_emit_cstring("\t.type\t");
 167                 be_emit_string(name);
 168                 be_emit_cstring(", ");
 169                 be_emit_char(be_gas_elf_type_char);
 170                 be_emit_cstring("function\n");
 171                 be_emit_write_line();
 172                 break;
 173         case GAS_FLAVOUR_MINGW:
 174                 be_emit_cstring("\t.def\t");
 175                 be_emit_string(name);
 176                 if (get_entity_visibility(entity) == visibility_external_visible) {
 177                         be_emit_cstring(";\t.scl\t2;\t.type\t32;\t.endef\n");
 178                 } else {
 179                         be_emit_cstring(";\t.scl\t3;\t.type\t32;\t.endef\n");
 180                 }
 181                 be_emit_write_line();
 182                 break;
 183         case GAS_FLAVOUR_MACH_O:
 184         case GAS_FLAVOUR_YASM:
 185                 break;
 186         }
 187         be_emit_string(name);
 188         be_emit_cstring(":\n");
 189         be_emit_write_line();
 190 }
 191
 192 void be_gas_emit_function_epilog(ir_entity *entity)
 193 {
 194         const char *name = get_entity_ld_name(entity);
 195
 196         if (be_gas_flavour == GAS_FLAVOUR_ELF) {
 197                 be_emit_cstring("\t.size\t");
 198                 be_emit_string(name);
 199                 be_emit_cstring(", .-");
 200                 be_emit_string(name);
 201                 be_emit_char('\n');
 202                 be_emit_write_line();
 203         }
 204
 205         be_emit_cstring("# -- End  ");
 206         be_emit_string(name);
 207         be_emit_char('\n');
 208         be_emit_write_line();
 209 }
 210
 211 /**
 212  * An environment containing all needed dumper data.
 213  * Currently we create the file completely in memory first, then
 214  * write it to the disk. This is an artifact from the old C-generating backend
 215  * and even there NOT needed. So we might change it in the future.
 216  */
 217 typedef struct _be_gas_decl_env {
 218         be_gas_section_t     section;
 219         waitq               *worklist;           /**< A worklist we use to place not yet handled entities on. */
 220 } be_gas_decl_env_t;
 221
 222 /************************************************************************/
 223
 224 /**
 225  * Output a tarval.
 226  *
 227  * @param tv     the tarval
 228  * @param bytes  the width of the tarvals value in bytes
 229  */
 230 static void dump_arith_tarval(tarval *tv, int bytes)
 231 {
 232         switch (bytes) {
 233         case 1:
 234                 be_emit_irprintf("0x%02x", get_tarval_sub_bits(tv, 0));
 235                 return;
 236
 237         case 2:
 238                 be_emit_irprintf("0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 239                 return;
 240
 241         case 4:
 242                 be_emit_irprintf("0x%02x%02x%02x%02x",
 243                         get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 244                 return;
 245
 246         case 8:
 247                 be_emit_irprintf("0x%02x%02x%02x%02x%02x%02x%02x%02x",
 248                         get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
 249                         get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 250                 return;
 251
 252         case 12:
 253                 /* Beware: Mixed endian output!  One little endian number emitted as
 254                  * three longs.  Each long initializer is written in big endian. */
 255                 be_emit_irprintf(
 256                         "\t.long\t0x%02x%02x%02x%02x\n"
 257                         "\t.long\t0x%02x%02x%02x%02x\n"
 258                         "\t.long\t0x%02x%02x%02x%02x",
 259                         get_tarval_sub_bits(tv,  3), get_tarval_sub_bits(tv,  2),
 260                         get_tarval_sub_bits(tv,  1), get_tarval_sub_bits(tv,  0),
 261                         get_tarval_sub_bits(tv,  7), get_tarval_sub_bits(tv,  6),
 262                         get_tarval_sub_bits(tv,  5), get_tarval_sub_bits(tv,  4),
 263                         get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
 264                         get_tarval_sub_bits(tv,  9), get_tarval_sub_bits(tv,  8)
 265                 );
 266                 return;
 267
 268         case 16:
 269                 be_emit_irprintf(
 270                         "\t.long\t0x%02x%02x%02x%02x0x%02x%02x%02x%02x0x%02x%02x%02x%02x0x%02x%02x%02x%02x",
 271                         get_tarval_sub_bits(tv, 15), get_tarval_sub_bits(tv, 16),
 272                         get_tarval_sub_bits(tv, 13), get_tarval_sub_bits(tv, 12),
 273                         get_tarval_sub_bits(tv, 11), get_tarval_sub_bits(tv, 10),
 274                         get_tarval_sub_bits(tv,  9), get_tarval_sub_bits(tv,  8),
 275                         get_tarval_sub_bits(tv,  7), get_tarval_sub_bits(tv,  6),
 276                         get_tarval_sub_bits(tv,  5), get_tarval_sub_bits(tv,  4),
 277                         get_tarval_sub_bits(tv,  3), get_tarval_sub_bits(tv,  2),
 278                         get_tarval_sub_bits(tv,  1), get_tarval_sub_bits(tv,  0)
 279                 );
 280                 return;
 281         }
 282
 283         panic("Can't dump a tarval with %d bytes", bytes);
 284 }
 285
 286 /**
 287  * Return the label prefix for labeled blocks.
 288  */
 289 const char *be_gas_block_label_prefix(void) {
 290         return ".LG";
 291 }
 292
 293 /**
 294  * Return the label prefix for labeled instructions.
 295  */
 296 const char *be_gas_insn_label_prefix(void) {
 297         return ".LE";
 298 }
 299
 300 void be_gas_emit_entity(ir_entity *entity)
 301 {
 302         if (entity->type == firm_code_type) {
 303                 ir_label_t label = get_entity_label(entity);
 304                 be_emit_string(be_gas_block_label_prefix());
 305                 be_emit_irprintf("%lu", label);
 306         } else {
 307                 be_emit_ident(get_entity_ld_ident(entity));
 308         }
 309 }
 310
 311 /**
 312  * Return the tarval of an atomic initializer.
 313  *
 314  * @param init  a node representing the initializer (on the const code irg)
 315  *
 316  * @return the tarval
 317  */
 318 static tarval *get_atomic_init_tv(ir_node *init)
 319 {
 320         for (;;) {
 321                 ir_mode *mode = get_irn_mode(init);
 322
 323                 switch (get_irn_opcode(init)) {
 324
 325                 case iro_Cast:
 326                         init = get_Cast_op(init);
 327                         continue;
 328
 329                 case iro_Conv:
 330                         init = get_Conv_op(init);
 331                         continue;
 332
 333                 case iro_Const:
 334                         return get_Const_tarval(init);
 335
 336                 case iro_SymConst:
 337                         switch (get_SymConst_kind(init)) {
 338                         case symconst_type_size:
 339                                 return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(init)), mode);
 340
 341                         case symconst_type_align:
 342                                 return new_tarval_from_long(get_type_alignment_bytes(get_SymConst_type(init)), mode);
 343
 344                         case symconst_ofs_ent:
 345                                 return new_tarval_from_long(get_entity_offset(get_SymConst_entity(init)), mode);
 346
 347                         case symconst_enum_const:
 348                                 return get_enumeration_value(get_SymConst_enum(init));
 349
 350                         default:
 351                                 return NULL;
 352                         }
 353
 354                 default:
 355                         return NULL;
 356                 }
 357         }
 358 }
 359
 360 /**
 361  * Dump an atomic value.
 362  *
 363  * @param env   the gas output environment
 364  * @param init  a node representing the atomic value (on the const code irg)
 365  */
 366 static void do_dump_atomic_init(be_gas_decl_env_t *env, ir_node *init)
 367 {
 368         ir_mode *mode = get_irn_mode(init);
 369         int bytes     = get_mode_size_bytes(mode);
 370         tarval *tv;
 371         ir_entity *ent;
 372
 373         init = skip_Id(init);
 374
 375         switch (get_irn_opcode(init)) {
 376         case iro_Cast:
 377                 do_dump_atomic_init(env, get_Cast_op(init));
 378                 return;
 379
 380         case iro_Conv:
 381                 do_dump_atomic_init(env, get_Conv_op(init));
 382                 return;
 383
 384         case iro_Const:
 385                 tv = get_Const_tarval(init);
 386
 387                 /* it's a arithmetic value */
 388                 dump_arith_tarval(tv, bytes);
 389                 return;
 390
 391         case iro_SymConst:
 392                 switch (get_SymConst_kind(init)) {
 393                 case symconst_addr_name:
 394                         be_emit_ident(get_SymConst_name(init));
 395                         break;
 396
 397                 case symconst_addr_ent:
 398                         ent = get_SymConst_entity(init);
 399                         if (!is_entity_backend_marked(ent)) {
 400                                 waitq_put(env->worklist, ent);
 401                                 set_entity_backend_marked(ent, 1);
 402                         }
 403                         be_gas_emit_entity(ent);
 404                         break;
 405
 406                 case symconst_ofs_ent:
 407                         ent = get_SymConst_entity(init);
 408                         be_emit_irprintf("%d", get_entity_offset(ent));
 409                         break;
 410
 411                 case symconst_type_size:
 412                         be_emit_irprintf("%u", get_type_size_bytes(get_SymConst_type(init)));
 413                         break;
 414
 415                 case symconst_type_align:
 416                         be_emit_irprintf("%u", get_type_alignment_bytes(get_SymConst_type(init)));
 417                         break;
 418
 419                 case symconst_enum_const:
 420                         tv = get_enumeration_value(get_SymConst_enum(init));
 421                         dump_arith_tarval(tv, bytes);
 422                         break;
 423
 424                 default:
 425                         assert(!"dump_atomic_init(): don't know how to init from this SymConst");
 426                 }
 427                 return;
 428
 429         case iro_Add:
 430                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 431                         panic("Constant must be int or pointer for '+' to work");
 432                 }
 433                 do_dump_atomic_init(env, get_Add_left(init));
 434                 be_emit_cstring(" + ");
 435                 do_dump_atomic_init(env, get_Add_right(init));
 436                 return;
 437
 438         case iro_Sub:
 439                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 440                         panic("Constant must be int or pointer for '-' to work");
 441                 }
 442                 do_dump_atomic_init(env, get_Sub_left(init));
 443                 be_emit_cstring(" - ");
 444                 do_dump_atomic_init(env, get_Sub_right(init));
 445                 return;
 446
 447         case iro_Mul:
 448                 if (!mode_is_int(mode) && !mode_is_reference(mode)) {
 449                         panic("Constant must be int or pointer for '*' to work");
 450                 }
 451                 do_dump_atomic_init(env, get_Mul_left(init));
 452                 be_emit_cstring(" * ");
 453                 do_dump_atomic_init(env, get_Mul_right(init));
 454                 return;
 455
 456         case iro_Unknown:
 457                 be_emit_cstring("0");
 458                 return;
 459
 460         default:
 461                 panic("dump_atomic_init(): unsupported IR-node %+F", init);
 462         }
 463 }
 464
 465 /**
 466  * Dumps the type for given size (.byte, .long, ...)
 467  *
 468  * @param size  the size in bytes
 469  */
 470 static void dump_size_type(size_t size) {
 471         switch (size) {
 472         case 1:
 473                 be_emit_cstring("\t.byte\t");
 474                 break;
 475
 476         case 2:
 477                 be_emit_cstring("\t.short\t");
 478                 break;
 479
 480         case 4:
 481                 be_emit_cstring("\t.long\t");
 482                 break;
 483
 484         case 8:
 485                 be_emit_cstring("\t.quad\t");
 486                 break;
 487
 488         case 10:
 489         case 12:
 490                 /* handled in arith */
 491                 break;
 492
 493         case 16:
 494                 be_emit_cstring("\t.octa\t");
 495                 break;
 496
 497         default:
 498                 panic("Try to dump a type with %u bytes", (unsigned)size);
 499         }
 500 }
 501
 502 /**
 503  * Emit an atomic value.
 504  *
 505  * @param env   the gas output environment
 506  * @param init  a node representing the atomic value (on the const code irg)
 507  */
 508 static void dump_atomic_init(be_gas_decl_env_t *env, ir_node *init)
 509 {
 510         ir_mode *mode = get_irn_mode(init);
 511         int bytes     = get_mode_size_bytes(mode);
 512
 513         dump_size_type(bytes);
 514         do_dump_atomic_init(env, init);
 515         be_emit_char('\n');
 516         be_emit_write_line();
 517 }
 518
 519 /************************************************************************/
 520 /* Routines to dump global variables                                    */
 521 /************************************************************************/
 522
 523 static int initializer_is_string_const(const ir_initializer_t *initializer)
 524 {
 525         size_t i, len;
 526         int found_printable = 0;
 527
 528         if (initializer->kind != IR_INITIALIZER_COMPOUND)
 529                 return 0;
 530
 531         len = initializer->compound.n_initializers;
 532         if (len < 1)
 533                 return 0;
 534         for (i = 0; i < len; ++i) {
 535                 int               c;
 536                 tarval           *tv;
 537                 ir_mode          *mode;
 538                 ir_initializer_t *sub_initializer
 539                         = initializer->compound.initializers[i];
 540
 541                 if (sub_initializer->kind != IR_INITIALIZER_TARVAL)
 542                         return 0;
 543
 544                 tv   = sub_initializer->tarval.value;
 545                 mode = get_tarval_mode(tv);
 546
 547                 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
 548                         return 0;
 549
 550                 c = get_tarval_long(tv);
 551                 if (isgraph(c) || isspace(c))
 552                         found_printable = 1;
 553                 else if (c != 0)
 554                         return 0;
 555
 556                 if (i == len - 1 && c != '\0')
 557                         return 0;
 558         }
 559
 560         return found_printable;
 561 }
 562
 563 /**
 564  * Determine if an entity is a string constant
 565  * @param ent The entity
 566  * @return 1 if it is a string constant, 0 otherwise
 567  */
 568 static int ent_is_string_const(ir_entity *ent)
 569 {
 570         ir_type *type, *element_type;
 571         ir_mode *mode;
 572         int i, c, n;
 573         int found_printable = 0;
 574
 575         type = get_entity_type(ent);
 576
 577         /* if it's an array */
 578         if (!is_Array_type(type))
 579                 return 0;
 580
 581         element_type = get_array_element_type(type);
 582
 583         /* and the array's element type is primitive */
 584         if (!is_Primitive_type(element_type))
 585                 return 0;
 586
 587         /* and the mode of the element type is an int of
 588          * the same size as the byte mode */
 589         mode = get_type_mode(element_type);
 590         if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
 591                 return 0;
 592
 593         if (ent->has_initializer) {
 594                 /* TODO */
 595                 return 0;
 596         } else {
 597                 /* if it contains only printable chars and a 0 at the end */
 598                 n = get_compound_ent_n_values(ent);
 599                 for (i = 0; i < n; ++i) {
 600                         ir_node *irn = get_compound_ent_value(ent, i);
 601                         if (! is_Const(irn))
 602                                 return 0;
 603
 604                         c = (int) get_tarval_long(get_Const_tarval(irn));
 605
 606                         if (isgraph(c) || isspace(c))
 607                                 found_printable = 1;
 608                         else if (c != 0)
 609                                 return 0;
 610
 611                         if (i == n - 1 && c != '\0')
 612                                 return 0;
 613                 }
 614         }
 615
 616         /* then we can emit it as a string constant */
 617         return found_printable;
 618 }
 619
 620 /**
 621  * Dump a string constant.
 622  * No checks are made!!
 623  *
 624  * @param ent  The entity to dump.
 625  */
 626 static void dump_string_cst(ir_entity *ent)
 627 {
 628         int      i, len;
 629         int      output_len;
 630         ir_type *type;
 631         int      type_size;
 632         int      remaining_space;
 633
 634         len        = get_compound_ent_n_values(ent);
 635         output_len = len;
 636         if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
 637                 be_emit_cstring("\t.ascii \"");
 638         } else {
 639                 be_emit_cstring("\t.string \"");
 640                 output_len -= 1;
 641         }
 642
 643         for (i = 0; i < output_len; ++i) {
 644                 ir_node *irn;
 645                 int c;
 646
 647                 irn = get_compound_ent_value(ent, i);
 648                 c = (int) get_tarval_long(get_Const_tarval(irn));
 649
 650                 switch (c) {
 651                 case '"' : be_emit_cstring("\\\""); break;
 652                 case '\n': be_emit_cstring("\\n"); break;
 653                 case '\r': be_emit_cstring("\\r"); break;
 654                 case '\t': be_emit_cstring("\\t"); break;
 655                 case '\\': be_emit_cstring("\\\\"); break;
 656                 default  :
 657                         if (isprint(c))
 658                                 be_emit_char(c);
 659                         else
 660                                 be_emit_irprintf("\\%o", c);
 661                         break;
 662                 }
 663         }
 664         be_emit_cstring("\"\n");
 665         be_emit_write_line();
 666
 667         type            = get_entity_type(ent);
 668         type_size       = get_type_size_bytes(type);
 669         remaining_space = type_size - len;
 670         assert(remaining_space >= 0);
 671         if (remaining_space > 0) {
 672                 be_emit_irprintf("\t.space\t%d\n", remaining_space);
 673         }
 674 }
 675
 676 static void dump_string_initializer(const ir_initializer_t *initializer)
 677 {
 678         size_t i, len;
 679
 680         len = initializer->compound.n_initializers;
 681         if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
 682                 be_emit_cstring("\t.ascii \"");
 683         } else {
 684                 be_emit_cstring("\t.string \"");
 685                 len -= 1;
 686         }
 687
 688         for (i = 0; i < len; ++i) {
 689                 const ir_initializer_t *sub_initializer
 690                         = get_initializer_compound_value(initializer, i);
 691
 692                 tarval *tv = get_initializer_tarval_value(sub_initializer);
 693                 int     c  = get_tarval_long(tv);
 694
 695                 switch (c) {
 696                 case '"' : be_emit_cstring("\\\""); break;
 697                 case '\n': be_emit_cstring("\\n"); break;
 698                 case '\r': be_emit_cstring("\\r"); break;
 699                 case '\t': be_emit_cstring("\\t"); break;
 700                 case '\\': be_emit_cstring("\\\\"); break;
 701                 default  :
 702                         if (isprint(c))
 703                                 be_emit_char(c);
 704                         else
 705                                 be_emit_irprintf("\\%o", c);
 706                         break;
 707                 }
 708         }
 709         be_emit_cstring("\"\n");
 710         be_emit_write_line();
 711 }
 712
 713 enum normal_or_bitfield_kind {
 714         NORMAL = 0,
 715         TARVAL,
 716         BITFIELD
 717 };
 718
 719 typedef struct {
 720         enum normal_or_bitfield_kind kind;
 721         union {
 722                 ir_node       *value;
 723                 tarval        *tarval;
 724                 unsigned char  bf_val;
 725         } v;
 726 } normal_or_bitfield;
 727
 728 static int is_type_variable_size(ir_type *type)
 729 {
 730         (void) type;
 731         /* TODO */
 732         return 0;
 733 }
 734
 735 static size_t get_initializer_size(const ir_initializer_t *initializer,
 736                                    ir_type *type)
 737 {
 738         switch (get_initializer_kind(initializer)) {
 739         case IR_INITIALIZER_TARVAL:
 740                 assert(get_tarval_mode(get_initializer_tarval_value(initializer)) == get_type_mode(type));
 741                 return get_type_size_bytes(type);
 742         case IR_INITIALIZER_CONST:
 743         case IR_INITIALIZER_NULL:
 744                 return get_type_size_bytes(type);
 745         case IR_INITIALIZER_COMPOUND:
 746                 if (!is_type_variable_size(type)) {
 747                         return get_type_size_bytes(type);
 748                 } else {
 749                         unsigned n_entries
 750                                 = get_initializer_compound_n_entries(initializer);
 751                         unsigned i;
 752                         unsigned initializer_size = get_type_size_bytes(type);
 753                         for (i = 0; i < n_entries; ++i) {
 754                                 ir_entity *entity = get_compound_member(type, i);
 755                                 ir_type   *type   = get_entity_type(entity);
 756
 757                                 const ir_initializer_t *sub_initializer
 758                                         = get_initializer_compound_value(initializer, i);
 759
 760                                 unsigned offset = get_entity_offset(entity);
 761                                 unsigned size   = get_initializer_size(sub_initializer, type);
 762
 763                                 if (offset + size > initializer_size) {
 764                                         initializer_size = offset + size;
 765                                 }
 766                         }
 767                         return initializer_size;
 768                 }
 769         }
 770
 771         panic("found invalid initializer");
 772 }
 773
 774 #ifndef NDEBUG
 775 static normal_or_bitfield *glob_vals;
 776 static size_t              max_vals;
 777 #endif
 778
 779 static void dump_bitfield(normal_or_bitfield *vals, size_t offset_bits,
 780                           const ir_initializer_t *initializer, ir_type *type)
 781 {
 782         unsigned char  last_bits = 0;
 783         ir_mode       *mode      = get_type_mode(type);
 784         tarval        *tv        = NULL;
 785         unsigned char  curr_bits;
 786         int            value_len;
 787         int            j;
 788
 789         switch (get_initializer_kind(initializer)) {
 790         case IR_INITIALIZER_NULL:
 791                 return;
 792         case IR_INITIALIZER_TARVAL:
 793                 tv = get_initializer_tarval_value(initializer);
 794                 break;
 795         case IR_INITIALIZER_CONST: {
 796                 ir_node *node = get_initializer_const_value(initializer);
 797                 if (!is_Const(node)) {
 798                         panic("bitfield initializer not a Const node");
 799                 }
 800                 tv = get_Const_tarval(node);
 801                 break;
 802         }
 803         case IR_INITIALIZER_COMPOUND:
 804                 panic("bitfield initializer is compound");
 805         }
 806         if (tv == NULL) {
 807                 panic("Couldn't get numeric value for bitfield initializer");
 808         }
 809         tv = tarval_convert_to(tv, get_type_mode(type));
 810
 811         /* normalize offset */
 812         vals        += offset_bits >> 3;
 813         offset_bits &= 7;
 814         value_len    = get_mode_size_bits(mode);
 815
 816         /* combine bits with existing bits */
 817         for (j = 0; value_len + (int) offset_bits > 0; ++j) {
 818                 assert((size_t) (vals - glob_vals) + j < max_vals);
 819                 assert(vals[j].kind == BITFIELD ||
 820                                 (vals[j].kind == NORMAL && vals[j].v.value == NULL));
 821                 vals[j].kind = BITFIELD;
 822                 curr_bits    = get_tarval_sub_bits(tv, j);
 823                 vals[j].v.bf_val
 824                         |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
 825                 value_len -= 8;
 826                 last_bits = curr_bits;
 827         }
 828 }
 829
 830 static void dump_ir_initializer(normal_or_bitfield *vals,
 831                                 const ir_initializer_t *initializer,
 832                                 ir_type *type)
 833 {
 834         assert((size_t) (vals - glob_vals) < max_vals);
 835
 836         switch (get_initializer_kind(initializer)) {
 837         case IR_INITIALIZER_NULL:
 838                 return;
 839         case IR_INITIALIZER_TARVAL: {
 840                 size_t i;
 841
 842                 assert(vals->kind != BITFIELD);
 843                 vals->kind     = TARVAL;
 844                 vals->v.tarval = get_initializer_tarval_value(initializer);
 845                 assert(get_type_mode(type) == get_tarval_mode(vals->v.tarval));
 846                 for (i = 1; i < get_type_size_bytes(type); ++i) {
 847                         vals[i].kind    = NORMAL;
 848                         vals[i].v.value = NULL;
 849                 }
 850                 return;
 851         }
 852         case IR_INITIALIZER_CONST: {
 853                 size_t i;
 854
 855                 assert(vals->kind != BITFIELD);
 856                 vals->kind    = NORMAL;
 857                 vals->v.value = get_initializer_const_value(initializer);
 858                 for (i = 1; i < get_type_size_bytes(type); ++i) {
 859                         vals[i].kind    = NORMAL;
 860                         vals[i].v.value = NULL;
 861                 }
 862                 return;
 863         }
 864         case IR_INITIALIZER_COMPOUND: {
 865                 size_t i = 0;
 866                 size_t n = get_initializer_compound_n_entries(initializer);
 867
 868                 if (is_Array_type(type)) {
 869                         ir_type *element_type = get_array_element_type(type);
 870                         size_t   skip         = get_type_size_bytes(element_type);
 871                         size_t   alignment    = get_type_alignment_bytes(element_type);
 872                         size_t   misalign     = skip % alignment;
 873                         if (misalign != 0) {
 874                                 skip += alignment - misalign;
 875                         }
 876
 877                         for (i = 0; i < n; ++i) {
 878                                 ir_initializer_t *sub_initializer
 879                                         = get_initializer_compound_value(initializer, i);
 880
 881                                 dump_ir_initializer(vals, sub_initializer, element_type);
 882
 883                                 vals += skip;
 884                         }
 885                 } else {
 886                         size_t n_members, i;
 887                         assert(is_compound_type(type));
 888                         n_members = get_compound_n_members(type);
 889                         for (i = 0; i < n_members; ++i) {
 890                                 ir_entity        *member    = get_compound_member(type, i);
 891                                 size_t            offset    = get_entity_offset(member);
 892                                 ir_type          *subtype   = get_entity_type(member);
 893                                 ir_mode          *mode      = get_type_mode(subtype);
 894                                 ir_initializer_t *sub_initializer;
 895
 896                                 assert(i < get_initializer_compound_n_entries(initializer));
 897                                 sub_initializer
 898                                         = get_initializer_compound_value(initializer, i);
 899
 900                                 if (mode != NULL) {
 901                                         size_t offset_bits
 902                                                 = get_entity_offset_bits_remainder(member);
 903                                         size_t value_len   = get_mode_size_bits(mode);
 904
 905                                         if (offset_bits != 0 ||
 906                                                 (value_len != 8 && value_len != 16 && value_len != 32
 907                                                  && value_len != 64)) {
 908                                                 dump_bitfield(&vals[offset], offset_bits,
 909                                                               sub_initializer, subtype);
 910                                                 continue;
 911                                         }
 912                                 }
 913
 914                                 dump_ir_initializer(&vals[offset], sub_initializer, subtype);
 915                         }
 916                 }
 917
 918                 return;
 919         }
 920         }
 921         panic("invalid ir_initializer kind found");
 922 }
 923
 924 static void dump_initializer(be_gas_decl_env_t *env, ir_entity *entity)
 925 {
 926         const ir_initializer_t *initializer = entity->attr.initializer;
 927         ir_type                *type;
 928         normal_or_bitfield     *vals;
 929         size_t                  size;
 930         size_t                  k;
 931
 932         if (initializer_is_string_const(initializer)) {
 933                 dump_string_initializer(initializer);
 934                 return;
 935         }
 936
 937         type = get_entity_type(entity);
 938         size = get_initializer_size(initializer, type);
 939
 940         if (size == 0)
 941                 return;
 942
 943         /*
 944          * In the worst case, every initializer allocates one byte.
 945          * Moreover, initializer might be big, do not allocate on stack.
 946          */
 947         vals = XMALLOCNZ(normal_or_bitfield, size);
 948
 949 #ifndef NDEBUG
 950         glob_vals = vals;
 951         max_vals  = size;
 952 #endif
 953
 954         dump_ir_initializer(vals, initializer, type);
 955
 956         /* now write values sorted */
 957         for (k = 0; k < size; ) {
 958                 int space     = 0;
 959                 int elem_size = 1;
 960                 if (vals[k].kind == NORMAL) {
 961                         if (vals[k].v.value != NULL) {
 962                                 dump_atomic_init(env, vals[k].v.value);
 963                                 elem_size = get_mode_size_bytes(get_irn_mode(vals[k].v.value));
 964                         } else {
 965                                 elem_size = 0;
 966                         }
 967                 } else if (vals[k].kind == TARVAL) {
 968                         tarval *tv   = vals[k].v.tarval;
 969                         size_t  size = get_mode_size_bytes(get_tarval_mode(tv));
 970
 971                         assert(tv != NULL);
 972
 973                         elem_size = size;
 974                         dump_size_type(size);
 975                         dump_arith_tarval(tv, size);
 976                         be_emit_char('\n');
 977                         be_emit_write_line();
 978                 } else {
 979                         assert(vals[k].kind == BITFIELD);
 980                         be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
 981                         be_emit_write_line();
 982                 }
 983
 984                 k += elem_size;
 985                 while (k < size && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
 986                         ++space;
 987                         ++k;
 988                 }
 989
 990                 /* a gap */
 991                 if (space > 0) {
 992                         be_emit_irprintf("\t.space\t%d\n", space);
 993                         be_emit_write_line();
 994                 }
 995         }
 996         xfree(vals);
 997 }
 998
 999 /**
1000  * Dump an initializer for a compound entity.
1001  */
1002 static void dump_compound_init(be_gas_decl_env_t *env, ir_entity *ent)
1003 {
1004         normal_or_bitfield *vals;
1005         int i, j, n;
1006         unsigned k, last_ofs;
1007
1008         if (ent->has_initializer) {
1009                 dump_initializer(env, ent);
1010                 return;
1011         }
1012
1013         n = get_compound_ent_n_values(ent);
1014
1015         /* Find the initializer size. Sorrily gcc support a nasty feature:
1016            The last field of a compound may be a flexible array. This allows
1017            initializers bigger than the type size. */
1018         last_ofs = get_type_size_bytes(get_entity_type(ent));
1019         for (i = 0; i < n; ++i) {
1020                 unsigned offset         = get_compound_ent_value_offset_bytes(ent, i);
1021                 unsigned bits_remainder = get_compound_ent_value_offset_bit_remainder(ent, i);
1022                 ir_node  *value         = get_compound_ent_value(ent, i);
1023                 unsigned value_len      = get_mode_size_bits(get_irn_mode(value));
1024
1025                 offset += (value_len + bits_remainder + 7) >> 3;
1026
1027                 if (offset > last_ofs) {
1028                         last_ofs = offset;
1029                 }
1030         }
1031
1032         /*
1033          * In the worst case, every initializer allocates one byte.
1034          * Moreover, initializer might be big, do not allocate on stack.
1035          */
1036         vals = XMALLOCNZ(normal_or_bitfield, last_ofs);
1037
1038         /* collect the values and store them at the offsets */
1039         for (i = 0; i < n; ++i) {
1040                 unsigned offset      = get_compound_ent_value_offset_bytes(ent, i);
1041                 int      offset_bits = get_compound_ent_value_offset_bit_remainder(ent, i);
1042                 ir_node  *value      = get_compound_ent_value(ent, i);
1043                 int      value_len   = get_mode_size_bits(get_irn_mode(value));
1044
1045                 assert(offset_bits >= 0);
1046
1047                 if (offset_bits != 0 ||
1048                         (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) {
1049                         tarval *tv = get_atomic_init_tv(value);
1050                         unsigned char curr_bits, last_bits = 0;
1051                         if (tv == NULL) {
1052                                 panic("Couldn't get numeric value for bitfield initializer '%s'",
1053                                       get_entity_ld_name(ent));
1054                         }
1055                         /* normalize offset */
1056                         offset += offset_bits >> 3;
1057                         offset_bits &= 7;
1058
1059                         for (j = 0; value_len + offset_bits > 0; ++j) {
1060                                 assert(offset + j < last_ofs);
1061                                 assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);
1062                                 vals[offset + j].kind = BITFIELD;
1063                                 curr_bits = get_tarval_sub_bits(tv, j);
1064                                 vals[offset + j].v.bf_val |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits);
1065                                 value_len -= 8;
1066                                 last_bits = curr_bits;
1067                         }
1068                 } else {
1069                         int i;
1070
1071                         assert(offset < last_ofs);
1072                         assert(vals[offset].kind == NORMAL);
1073                         for (i = 1; i < value_len / 8; ++i) {
1074                                 assert(vals[offset + i].v.value == NULL);
1075                         }
1076                         vals[offset].v.value = value;
1077                 }
1078         }
1079
1080         /* now write them sorted */
1081         for (k = 0; k < last_ofs; ) {
1082                 int space = 0, skip = 0;
1083                 if (vals[k].kind == NORMAL) {
1084                         if (vals[k].v.value != NULL) {
1085                                 dump_atomic_init(env, vals[k].v.value);
1086                                 skip = get_mode_size_bytes(get_irn_mode(vals[k].v.value)) - 1;
1087                         } else {
1088                                 space = 1;
1089                         }
1090                 } else {
1091                         assert(vals[k].kind == BITFIELD);
1092                         be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val);
1093                 }
1094
1095                 ++k;
1096                 while (k < last_ofs && vals[k].kind == NORMAL && vals[k].v.value == NULL) {
1097                         ++space;
1098                         ++k;
1099                 }
1100                 space -= skip;
1101                 assert(space >= 0);
1102
1103                 /* a gap */
1104                 if (space > 0) {
1105                         be_emit_irprintf("\t.space\t%d\n", space);
1106                         be_emit_write_line();
1107                 }
1108         }
1109         xfree(vals);
1110 }
1111
1112 static void emit_align(unsigned p2alignment)
1113 {
1114         be_emit_irprintf("\t.p2align\t%u\n", log2_floor(p2alignment));
1115         be_emit_write_line();
1116 }
1117
1118 static unsigned get_effective_entity_alignment(ir_entity *entity)
1119 {
1120         unsigned alignment = get_entity_alignment(entity);
1121         if (alignment == 0) {
1122                 ir_type *type = get_entity_type(entity);
1123                 alignment     = get_type_alignment_bytes(type);
1124         }
1125         return alignment;
1126 }
1127
1128
1129 /**
1130  * Dump a global entity.
1131  *
1132  * @param env           the gas output environment
1133  * @param ent           the entity to be dumped
1134  */
1135 static void dump_global(be_gas_decl_env_t *env, ir_entity *ent)
1136 {
1137         ir_type          *type           = get_entity_type(ent);
1138         ident            *ld_ident       = get_entity_ld_ident(ent);
1139         unsigned          alignment      = get_effective_entity_alignment(ent);
1140         int               emit_as_common = 0;
1141         be_gas_section_t  section        = env->section;
1142         ir_variability    variability    = get_entity_variability(ent);
1143         ir_visibility     visibility     = get_entity_visibility(ent);
1144
1145         if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) {
1146                 return;
1147         }
1148         if (type == firm_code_type) {
1149                 return;
1150         }
1151
1152         if (section != (be_gas_section_t) -1) {
1153                 emit_as_common = 0;
1154         } else if (variability == variability_constant) {
1155                 /* a constant entity, put it on the rdata */
1156                 section = GAS_SECTION_RODATA;
1157                 if (be_gas_flavour == GAS_FLAVOUR_MACH_O
1158                                 && ent_is_string_const(ent)) {
1159                         section = GAS_SECTION_CSTRING;
1160                 }
1161         } else if (variability == variability_uninitialized) {
1162                 /* uninitialized entity put it in bss segment */
1163                 section = GAS_SECTION_COMMON;
1164                 if (visibility != visibility_local)
1165                         emit_as_common = 1;
1166         } else {
1167                 section = GAS_SECTION_DATA;
1168         }
1169
1170         if (!emit_as_common) {
1171                 be_gas_emit_switch_section(section);
1172         }
1173
1174         be_dbg_variable(ent);
1175
1176         /* global or not global */
1177         if (visibility == visibility_external_visible && !emit_as_common) {
1178                 be_emit_cstring(".globl\t");
1179                 be_emit_ident(ld_ident);
1180                 be_emit_char('\n');
1181                 be_emit_write_line();
1182         } else if (visibility == visibility_external_allocated) {
1183                 be_emit_cstring(".globl\t");
1184                 be_emit_ident(ld_ident);
1185                 be_emit_char('\n');
1186                 be_emit_write_line();
1187                 /* we can return now... */
1188                 return;
1189         }
1190         if (!is_po2(alignment))
1191                 panic("alignment not a power of 2");
1192         /* alignment */
1193         if (alignment > 1 && !emit_as_common && section != GAS_SECTION_PIC_TRAMPOLINES
1194                         && section != GAS_SECTION_PIC_SYMBOLS) {
1195                 emit_align(alignment);
1196         }
1197
1198         if (visibility != visibility_external_allocated && !emit_as_common
1199                         && be_gas_flavour == GAS_FLAVOUR_ELF
1200                         && be_gas_emit_types) {
1201                 be_emit_cstring("\t.type\t");
1202                 be_emit_ident(ld_ident);
1203                 be_emit_cstring(", ");
1204                 be_emit_char(be_gas_elf_type_char);
1205                 be_emit_cstring("object\n\t.size\t");
1206                 be_emit_ident(ld_ident);
1207                 be_emit_irprintf(", %u\n", get_type_size_bytes(type));
1208         }
1209
1210         if (!emit_as_common) {
1211                 be_emit_ident(ld_ident);
1212                 be_emit_cstring(":\n");
1213                 be_emit_write_line();
1214         }
1215
1216         if (variability == variability_uninitialized) {
1217                 if (emit_as_common) {
1218                         switch (be_gas_flavour) {
1219                         case GAS_FLAVOUR_MACH_O:
1220                                 be_emit_irprintf("\t.comm %s,%u,%u\n",
1221                                         get_id_str(ld_ident), get_type_size_bytes(type),
1222                                         log2_floor(alignment));
1223                                 break;
1224                         case GAS_FLAVOUR_ELF:
1225                         case GAS_FLAVOUR_YASM:
1226                                 be_emit_irprintf("\t.comm %s,%u,%u\n",
1227                                         get_id_str(ld_ident), get_type_size_bytes(type), alignment);
1228                                 be_emit_write_line();
1229                                 break;
1230                         case GAS_FLAVOUR_MINGW:
1231                                 be_emit_irprintf("\t.comm %s,%u # %u\n",
1232                                         get_id_str(ld_ident), get_type_size_bytes(type), alignment);
1233                                 be_emit_write_line();
1234                                 break;
1235                         }
1236                 } else if (section == GAS_SECTION_PIC_TRAMPOLINES
1237                                 || section == GAS_SECTION_PIC_SYMBOLS) {
1238                         if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
1239                                 be_emit_cstring("\t.indirect_symbol ");
1240                                 be_emit_ident(get_entity_ident(ent));
1241                                 be_emit_char('\n');
1242                                 be_emit_write_line();
1243                                 if (section == GAS_SECTION_PIC_TRAMPOLINES) {
1244                                         be_emit_cstring("\thlt ; hlt ; hlt ; hlt ; hlt\n");
1245                                         be_emit_write_line();
1246                                 } else {
1247                                         assert(section == GAS_SECTION_PIC_SYMBOLS);
1248                                         be_emit_cstring("\t.long 0\n");
1249                                         be_emit_write_line();
1250                                 }
1251                         } else {
1252                                 panic("PIC trampolines not yet supported in this gas mode");
1253                         }
1254                 } else {
1255                         be_emit_irprintf("\t.space %u\n", get_type_size_bytes(type));
1256                         be_emit_write_line();
1257                 }
1258         } else {
1259                 if (is_atomic_entity(ent)) {
1260                         dump_atomic_init(env, get_atomic_ent_value(ent));
1261                 } else {
1262                         /* sort_compound_ent_values(ent); */
1263
1264                         switch (get_type_tpop_code(get_entity_type(ent))) {
1265                         case tpo_array:
1266                                 if (ent_is_string_const(ent))
1267                                         dump_string_cst(ent);
1268                                 else
1269                                         dump_compound_init(env, ent);
1270                                 break;
1271                         case tpo_struct:
1272                         case tpo_class:
1273                         case tpo_union:
1274                                 dump_compound_init(env, ent);
1275                                 break;
1276                         default:
1277                                 panic("Unimplemented type kind in dump_global()");
1278                         }
1279                 }
1280         }
1281 }
1282
1283 /**
1284  * Dumps declarations of global variables and the initialization code.
1285  *
1286  * @param gt                a global like type, either the global or the TLS one
1287  * @param env               an environment
1288  * @param only_emit_marked  if non-zero, external allocated entities that do not have
1289  *                          its visited flag set are ignored
1290  */
1291 static void be_gas_dump_globals(ir_type *gt, be_gas_decl_env_t *env,
1292                                 int only_emit_marked)
1293 {
1294         int i, n = get_compound_n_members(gt);
1295         waitq *worklist = new_waitq();
1296
1297         if (only_emit_marked) {
1298                 for (i = 0; i < n; i++) {
1299                         ir_entity *ent = get_compound_member(gt, i);
1300                         if (is_entity_backend_marked(ent) ||
1301                             get_entity_visibility(ent) != visibility_external_allocated) {
1302                                 waitq_put(worklist, ent);
1303                                 set_entity_backend_marked(ent, 1);
1304                         }
1305                 }
1306         } else {
1307                 for (i = 0; i < n; i++) {
1308                         ir_entity *ent = get_compound_member(gt, i);
1309                         set_entity_backend_marked(ent, 1);
1310                         waitq_put(worklist, ent);
1311                 }
1312         }
1313
1314         env->worklist = worklist;
1315
1316         while (!waitq_empty(worklist)) {
1317                 ir_entity *ent = waitq_get(worklist);
1318
1319                 dump_global(env, ent);
1320         }
1321
1322         del_waitq(worklist);
1323         env->worklist = NULL;
1324 }
1325
1326 /************************************************************************/
1327
1328 /* Generate all entities. */
1329 void be_gas_emit_decls(const be_main_env_t *main_env,
1330                        int only_emit_marked_entities)
1331 {
1332         be_gas_decl_env_t env;
1333         memset(&env, 0, sizeof(env));
1334
1335         /* dump global type */
1336         env.section = (be_gas_section_t) -1;
1337         be_gas_dump_globals(get_glob_type(), &env, only_emit_marked_entities);
1338         env.section = GAS_SECTION_TLS;
1339         be_gas_dump_globals(get_tls_type(), &env, only_emit_marked_entities);
1340         env.section = GAS_SECTION_CONSTRUCTORS;
1341         be_gas_dump_globals(get_segment_type(IR_SEGMENT_CONSTRUCTORS), &env,
1342                             only_emit_marked_entities);
1343         env.section = GAS_SECTION_DESTRUCTORS;
1344         be_gas_dump_globals(get_segment_type(IR_SEGMENT_DESTRUCTORS), &env,
1345                             only_emit_marked_entities);
1346
1347         env.section = GAS_SECTION_PIC_SYMBOLS;
1348         be_gas_dump_globals(main_env->pic_symbols_type, &env,
1349                             only_emit_marked_entities);
1350
1351         if (get_compound_n_members(main_env->pic_trampolines_type) > 0) {
1352                 env.section = GAS_SECTION_PIC_TRAMPOLINES;
1353                 be_gas_dump_globals(main_env->pic_trampolines_type, &env,
1354                                     only_emit_marked_entities);
1355                 if (be_gas_flavour == GAS_FLAVOUR_MACH_O) {
1356                         be_emit_cstring("\t.subsections_via_symbols\n");
1357                         be_emit_write_line();
1358                 }
1359         }
1360 }