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