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