nsz Git - libfirm/blob - ir/be/ia32/ia32_gen_decls.c

   1 /**
   2  * Dumps global variables and constants as ia32 assembler.
   3  * @author Christian Wuerdig
   4  * @date 04.11.2005
   5  * @version $Id$
   6  */
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <ctype.h>
  11 #include <assert.h>
  12
  13 #include "obst.h"
  14 #include "tv.h"
  15 #include "irnode.h"
  16 #include "entity.h"
  17 #include "irprog.h"
  18
  19 #include "../be.h"
  20
  21 #include "ia32_emitter.h"
  22 #include "ia32_gen_decls.h"
  23
  24 typedef struct obstack obstack_t;
  25
  26 typedef struct _ia32_decl_env {
  27         obstack_t *rodata_obst;
  28         obstack_t *data_obst;
  29         obstack_t *comm_obst;
  30         obstack_t *ctor_obst;
  31         const be_main_env_t *main_env;
  32 } ia32_decl_env_t;
  33
  34 /************************************************************************/
  35
  36 /*
  37  * returns the highest bit value
  38  */
  39 static unsigned highest_bit(unsigned v)
  40 {
  41         int res = -1;
  42
  43         if (v >= (1U << 16U)) {
  44                 res += 16;
  45                 v >>= 16;
  46         }
  47         if (v >= (1U << 8U)) {
  48                 res += 8;
  49                 v >>= 8;
  50         }
  51         if (v >= (1U << 4U)) {
  52                 res += 4;
  53                 v >>= 4;
  54         }
  55         if (v >= (1U << 2U)) {
  56                 res += 2;
  57                 v >>= 2;
  58         }
  59         if (v >= (1U << 1U)) {
  60                 res += 1;
  61                 v >>= 1;
  62         }
  63         if (v >= 1)
  64                 res += 1;
  65
  66         return res;
  67 }
  68
  69 static void ia32_dump_comm(obstack_t *obst, const char *name, ir_visibility vis, int size, int align) {
  70         switch (asm_flavour) {
  71         case ASM_LINUX_GAS:
  72                 if (vis == visibility_local)
  73                         obstack_printf(obst, "\t.local\t%s\n", name);
  74                 obstack_printf(obst, "\t.comm\t%s,%d,%d\n", name, size, align);
  75                 break;
  76         case ASM_MINGW_GAS:
  77                 if (vis == visibility_local)
  78                         obstack_printf(obst, "\t.lcomm\t%s,%d\n", name, size);
  79                 else
  80                         obstack_printf(obst, "\t.comm\t%s,%d\n", name, size);
  81                 break;
  82         default:
  83                 break;
  84         }
  85 }
  86
  87 /**
  88  * output the alignment to an obstack
  89  */
  90 static void ia32_dump_align(obstack_t *obst, int align)
  91 {
  92         int h = highest_bit(align);
  93
  94         if ((1 << h) < align)
  95                 ++h;
  96         align = (1 << h);
  97
  98         if (align > 1)
  99                 obstack_printf(obst, "\t.align %d\n", align);
 100 }
 101
 102 /**
 103  * output the alignment to a FILE
 104  */
 105 static void ia32_dump_align_f(FILE *f, int align)
 106 {
 107         int h = highest_bit(align);
 108
 109         if ((1 << h) < align)
 110                 ++h;
 111         align = (1 << h);
 112
 113         if (align > 1)
 114                 fprintf(f, "\t.align %d\n", align);
 115 }
 116
 117 /**
 118  * output a tarval
 119  */
 120 static void dump_arith_tarval(obstack_t *obst, tarval *tv, int bytes)
 121 {
 122         switch (bytes) {
 123
 124         case 1:
 125                 obstack_printf(obst, "0x%02x", get_tarval_sub_bits(tv, 0));
 126                 break;
 127
 128         case 2:
 129                 obstack_printf(obst, "0x%02x%02x", get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 130                 break;
 131
 132         case 4:
 133                 obstack_printf(obst, "0x%02x%02x%02x%02x",
 134                         get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 135                 break;
 136
 137         case 8:
 138                 obstack_printf(obst, "0x%02x%02x%02x%02x%02x%02x%02x%02x",
 139                         get_tarval_sub_bits(tv, 7), get_tarval_sub_bits(tv, 6), get_tarval_sub_bits(tv, 5), get_tarval_sub_bits(tv, 4),
 140                         get_tarval_sub_bits(tv, 3), get_tarval_sub_bits(tv, 2), get_tarval_sub_bits(tv, 1), get_tarval_sub_bits(tv, 0));
 141                 break;
 142
 143         case 10:
 144         case 12:
 145                 break;
 146
 147         default:
 148                 fprintf(stderr, "Try to dump an tarval with %d bytes\n", bytes);
 149                 assert(0);
 150         }
 151 }
 152
 153 /*
 154  * dump an atomic value
 155  */
 156 static void do_dump_atomic_init(obstack_t *obst, ir_node *init)
 157 {
 158         ir_mode *mode = get_irn_mode(init);
 159         int bytes     = get_mode_size_bytes(mode);
 160         tarval *tv;
 161
 162         switch (get_irn_opcode(init)) {
 163
 164         case iro_Cast:
 165                 do_dump_atomic_init(obst, get_Cast_op(init));
 166                 return;
 167
 168         case iro_Conv:
 169                 do_dump_atomic_init(obst, get_Conv_op(init));
 170                 return;
 171
 172         case iro_Const:
 173                 tv = get_Const_tarval(init);
 174
 175                 /* beware of old stuff */
 176                 //assert(! mode_is_reference(mode));
 177
 178                 /* it's a arithmetic value */
 179                 dump_arith_tarval(obst, tv, bytes);
 180                 return;
 181
 182         case iro_SymConst:
 183                 switch (get_SymConst_kind(init)) {
 184                 case symconst_addr_name:
 185                         obstack_printf(obst, "%s", get_id_str(get_SymConst_name(init)));
 186                         break;
 187
 188                 case symconst_addr_ent:
 189                         obstack_printf(obst, "%s", get_entity_ld_name(get_SymConst_entity(init)));
 190                         break;
 191
 192                 case symconst_ofs_ent:
 193                         obstack_printf(obst, "%d", get_entity_offset_bytes(get_SymConst_entity(init)));
 194                         break;
 195
 196                 case symconst_type_size:
 197                         obstack_printf(obst, "%d", get_type_size_bytes(get_SymConst_type(init)));
 198                         break;
 199
 200                 case symconst_type_align:
 201                         obstack_printf(obst, "%d", get_type_alignment_bytes(get_SymConst_type(init)));
 202                         break;
 203
 204                 case symconst_enum_const:
 205                         tv = get_enumeration_value(get_SymConst_enum(init));
 206                         dump_arith_tarval(obst, tv, bytes);
 207                         break;
 208
 209                 default:
 210                         assert(!"dump_atomic_init(): don't know how to init from this SymConst");
 211                 }
 212                 return;
 213
 214                 case iro_Add:
 215                         do_dump_atomic_init(obst, get_Add_left(init));
 216                         obstack_printf(obst, " + ");
 217                         do_dump_atomic_init(obst, get_Add_right(init));
 218                         return;
 219
 220                 case iro_Sub:
 221                         do_dump_atomic_init(obst, get_Sub_left(init));
 222                         obstack_printf(obst, " - ");
 223                         do_dump_atomic_init(obst, get_Sub_right(init));
 224                         return;
 225
 226                 case iro_Mul:
 227                         do_dump_atomic_init(obst, get_Mul_left(init));
 228                         obstack_printf(obst, " * ");
 229                         do_dump_atomic_init(obst, get_Mul_right(init));
 230                         return;
 231
 232                 default:
 233                         assert(0 && "dump_atomic_init(): unknown IR-node");
 234         }
 235 }
 236
 237 /*
 238  * dumps the type for given size (.byte, .long, ...)
 239  */
 240 static void dump_size_type(obstack_t *obst, int size) {
 241         switch (size) {
 242
 243         case 1:
 244                 obstack_printf(obst, "\t.byte\t");
 245                 break;
 246
 247         case 2:
 248                 obstack_printf(obst, "\t.value\t");
 249                 break;
 250
 251         case 4:
 252                 obstack_printf(obst, "\t.long\t");
 253                 break;
 254
 255         case 8:
 256                 obstack_printf(obst, "\t.quad\t");
 257                 break;
 258
 259         case 10:
 260         case 12:
 261                 /* handled in arith */
 262                 break;
 263
 264         default:
 265                 fprintf(stderr, "Try to dump a type with %d bytes\n", size);
 266                 assert(0);
 267         }
 268 }
 269
 270 /*
 271  * dump an atomic value
 272  */
 273 static void dump_atomic_init(obstack_t *obst, ir_node *init)
 274 {
 275         ir_mode *mode = get_irn_mode(init);
 276         int bytes     = get_mode_size_bytes(mode);
 277
 278         dump_size_type(obst, bytes);
 279         do_dump_atomic_init(obst, init);
 280         obstack_printf(obst, "\n");
 281 }
 282
 283 /************************************************************************/
 284 /* Routines to dump global variables                                    */
 285 /************************************************************************/
 286
 287 /**
 288  * Determine if an entity is a string constant
 289  * @param ent The entity
 290  * @return 1 if it is a string constant, 0 otherwise
 291  */
 292 static int ent_is_string_const(entity *ent)
 293 {
 294         int res = 0;
 295         ir_type *ty;
 296
 297         ty = get_entity_type(ent);
 298
 299         /* if it's an array */
 300         if (is_Array_type(ty)) {
 301                 ir_type *elm_ty = get_array_element_type(ty);
 302
 303                 /* and the array's element type is primitive */
 304                 if (is_Primitive_type(elm_ty)) {
 305                         ir_mode *mode = get_type_mode(elm_ty);
 306
 307                         /*
 308                         * and the mode of the element type is an int of
 309                         * the same size as the byte mode
 310                         */
 311                         if (mode_is_int(mode)
 312                                 && get_mode_size_bits(mode) == get_mode_size_bits(mode_Bs))
 313                         {
 314                                 int i, c, n;
 315
 316                                 n = get_compound_ent_n_values(ent);
 317                                 for (i = 0; i < n; ++i) {
 318                                         ir_node *irn = get_compound_ent_value(ent, i);
 319                                         if(get_irn_opcode(irn) != iro_Const)
 320                                                 return 0;
 321
 322                                         c = (int) get_tarval_long(get_Const_tarval(irn));
 323
 324                                         if((i < n - 1 && !(isgraph(c) || isspace(c)))
 325                                                 || (i == n - 1 && c != '\0'))
 326                                                 return 0;
 327                                 }
 328
 329                                 res = 1;
 330                         }
 331                 }
 332         }
 333
 334         return res;
 335 }
 336
 337 /**
 338  * Dump a atring constant.
 339  * No checks are made!!
 340  * @param obst The obst to dump on.
 341  * @param ent The entity to dump.
 342  */
 343 static void dump_string_cst(obstack_t *obst, entity *ent)
 344 {
 345         int i, n;
 346
 347         obstack_printf(obst, "\t.string \"");
 348         n = get_compound_ent_n_values(ent);
 349
 350         for (i = 0; i < n-1; ++i) {
 351                 ir_node *irn;
 352                 int c;
 353
 354                 irn = get_compound_ent_value(ent, i);
 355                 c = (int) get_tarval_long(get_Const_tarval(irn));
 356
 357                 switch (c) {
 358                 case '"' : obstack_printf(obst, "\\\""); break;
 359                 case '\n': obstack_printf(obst, "\\n"); break;
 360                 case '\r': obstack_printf(obst, "\\r"); break;
 361                 case '\t': obstack_printf(obst, "\\t"); break;
 362                 case '\\': obstack_printf(obst, "\\\\"); break;
 363                 default  :
 364                         if (isprint(c))
 365                                 obstack_printf(obst, "%c", c);
 366                         else
 367                                 obstack_printf(obst, "%O", c);
 368                         break;
 369                 }
 370         }
 371         obstack_printf(obst, "\"\n");
 372 }
 373
 374 struct arr_info {
 375         int n_elems;
 376         int visit_cnt;
 377         int size;
 378 };
 379
 380 /**
 381  * Dump the size of an object
 382  */
 383 static void dump_object_size(obstack_t *obst, const char *name, int size) {
 384         switch (asm_flavour) {
 385         case ASM_LINUX_GAS:
 386                 obstack_printf(obst, "\t.type\t%s,@object\n", name);
 387                 obstack_printf(obst, "\t.size\t%s,%d\n", name, size);
 388                 break;
 389         default:
 390                 break;
 391         }
 392 }
 393
 394 /*
 395  * Dumps the initialization of global variables that are not
 396  * "uninitialized".
 397  */
 398 static void dump_global(const be_main_env_t *main_env,
 399                                                 obstack_t *rdata_obstack, obstack_t *data_obstack,
 400                                                 obstack_t *comm_obstack, obstack_t *ctor_obstack,
 401                                                 entity *ent)
 402 {
 403         ir_type *ty         = get_entity_type(ent);
 404         const char *ld_name = get_entity_ld_name(ent);
 405         obstack_t *obst     = data_obstack;
 406         int align, h;
 407
 408         /*
 409          * FIXME: did NOT work for partly constant values
 410          */
 411         if (! is_Method_type(ty)) {
 412                 ir_variability variability = get_entity_variability(ent);
 413                 ir_visibility visibility = get_entity_visibility(ent);
 414
 415                 if (variability == variability_constant) {
 416                         /* a constant entity, put it on the rdata */
 417                         obst = rdata_obstack;
 418                 }
 419
 420                 /* check, whether it is initialized, if yes create data */
 421                 if (variability != variability_uninitialized) {
 422                         be_dbg_variable(main_env->db_handle, obst, ent);
 423
 424                         if (visibility == visibility_external_visible) {
 425                                 obstack_printf(obst, ".globl\t%s\n", ld_name);
 426                         }
 427                         dump_object_size(obst, ld_name, get_type_size_bytes(ty));
 428
 429                         align = get_type_alignment_bytes(ty);
 430                         ia32_dump_align(obst, align);
 431
 432                         obstack_printf(obst, "%s:\n", ld_name);
 433
 434                         if (is_atomic_type(ty)) {
 435                                 if (get_entity_visibility(ent) != visibility_external_allocated)
 436                                         dump_atomic_init(obst, get_atomic_ent_value(ent));
 437                         }
 438                         else {
 439                                 int i, size = 0;
 440
 441                                 if (ent_is_string_const(ent)) {
 442                                         dump_string_cst(obst, ent);
 443                                 }
 444                                 else if (is_Array_type(ty)) {
 445                                         int filler;
 446
 447                                         /* potential spare values should be already included! */
 448                                         for (i = 0; i < get_compound_ent_n_values(ent); ++i) {
 449                                                 entity *step = get_compound_ent_value_member(ent, i);
 450                                                 ir_type *stype = get_entity_type(step);
 451
 452                                                 if (get_type_mode(stype)) {
 453                                                         int align = (get_type_alignment_bits(stype) + 7) >> 3;
 454                                                         int n     = size % align;
 455
 456                                                         if (n > 0) {
 457                                                                 obstack_printf(obst, "\t.zero\t%d\n", align - n);
 458                                                                 size += align - n;
 459                                                         }
 460                                                 }
 461                                                 dump_atomic_init(obst, get_compound_ent_value(ent, i));
 462                                                 size += get_type_size_bytes(stype);
 463                                         }
 464                                         filler = get_type_size_bytes(ty) - size;
 465
 466                                         if (filler > 0)
 467                                                 obstack_printf(obst, "\t.zero\t%d\n", filler);
 468                                 }
 469                                 else if (is_compound_type(ty)) {
 470                                         ir_node **vals;
 471                                         int type_size, j;
 472
 473                                         /* Compound entities are NOT sorted.
 474                                          * The sorting strategy used doesn't work for `value' compound fields nor
 475                                          * for partially_constant entities.
 476                                          */
 477
 478                                         /*
 479                                          * in the worst case, every entity allocates one byte, so the type
 480                                          * size should be equal or bigger the number of fields
 481                                          */
 482                                         type_size = get_type_size_bytes(ty);
 483                                         vals      = xcalloc(type_size, sizeof(*vals));
 484
 485                                         /* collect the values and store them at the offsets */
 486                                         for(i = 0; i < get_compound_ent_n_values(ent); ++i) {
 487                                                 int                 graph_length, aipos, offset;
 488                                                 struct arr_info     *ai;
 489                                                 int                 all_n = 1;
 490                                                 compound_graph_path *path = get_compound_ent_value_path(ent, i);
 491
 492                                                 /* get the access path to the costant value */
 493                                                 graph_length = get_compound_graph_path_length(path);
 494                                                 ai = xcalloc(graph_length, sizeof(struct arr_info));
 495
 496                                                 /* We wanna know how many arrays are on the path to the entity. We also have to know how
 497                                                  * many elements each array holds to calculate the offset for the entity. */
 498                                                 for (j = 0; j < graph_length; j++) {
 499                                                         entity  *step      = get_compound_graph_path_node(path, j);
 500                                                         ir_type *step_type = get_entity_type(step);
 501                                                         int     ty_size    = (get_type_size_bits(step_type) + 7) >> 3;
 502                                                         int     k, n       = 0;
 503
 504                                                         if (is_Array_type(step_type))
 505                                                                 for (k = 0; k < get_array_n_dimensions(step_type); k++)
 506                                                                         n += get_tarval_long(get_Const_tarval(get_array_upper_bound(step_type, k)));
 507                                                                 if (n) all_n *= n;
 508                                                                 ai[j].n_elems = n ? all_n + 1 : 0;
 509                                                                 ai[j].visit_cnt = 0;
 510                                                                 ai[j].size = ty_size;
 511                                                 }
 512
 513                                                 aipos = graph_length - 1;
 514                                                 if (aipos) aipos--;
 515
 516                                                 for (offset = j = 0; j < graph_length; j++) {
 517                                                         entity *step       = get_compound_graph_path_node(path, j);
 518                                                         ir_type *step_type = get_entity_type(step);
 519                                                         int ent_ofs        = get_entity_offset_bytes(step);
 520                                                         int stepsize       = 0;
 521
 522                                                         /* add all positive offsets (= offsets in structs) */
 523                                                         if (ent_ofs >= 0) offset += ent_ofs;
 524
 525                                                         if (j == graph_length - 1) {
 526                                                                 stepsize = (get_type_size_bits(step_type) + 7) >> 3;
 527
 528                                                                 /* Search the next free position in vals depending on the information from above (ai). */
 529                                                                 while (vals[offset] && aipos >= 0) {
 530                                                                         if (ai[aipos].visit_cnt < ai[aipos].n_elems) {
 531                                                                                 offset += stepsize;
 532                                                                                 ai[aipos].visit_cnt++;
 533                                                                         }
 534                                                                         else
 535                                                                                 while (aipos >= 0 && ai[aipos].visit_cnt == ai[aipos].n_elems) {
 536                                                                                         stepsize = ai[aipos--].size;
 537                                                                                         offset  += stepsize;
 538                                                                                 }
 539                                                                 }
 540
 541                                                                 assert(aipos >= 0 && "couldn't store entity");
 542                                                                 vals[offset] = get_compound_ent_value(ent, i);
 543                                                         }
 544                                                 }
 545
 546                                                 free(ai);
 547                                         }
 548
 549                                         /* now write them sorted */
 550                                         for(i = 0; i < type_size; ) {
 551                                                 if (vals[i]) {
 552                                                         dump_atomic_init(obst, vals[i]);
 553                                                         i += (get_mode_size_bytes(get_irn_mode(vals[i])));
 554                                                 }
 555                                                 else {
 556                                                         /* a gap */
 557                                                         obstack_printf(obst, "\t.byte\t0\n");
 558                                                         ++i;
 559                                                 }
 560                                         }
 561                                         free(vals);
 562                                 }
 563                                 else {
 564                                         assert(0 && "unsupported type");
 565                                 }
 566                         }
 567                         obstack_printf(obst, "\n");
 568                 }
 569                 else if (visibility != visibility_external_allocated) {
 570                         be_dbg_variable(main_env->db_handle, comm_obstack, ent);
 571
 572                         /* uninitialized and NOT external */
 573                         if (get_entity_owner(ent) != get_tls_type()) {
 574                                 /* calculate the alignment */
 575                                 align = get_type_alignment_bytes(ty);
 576                                 h = highest_bit(align);
 577
 578                                 if ((1 << h) < align)
 579                                         ++h;
 580                                 align = (1 << h);
 581
 582                                 if (align < 1)
 583                                         align = 1;
 584
 585                                 ia32_dump_comm(comm_obstack, ld_name, visibility,
 586                                         get_type_size_bytes(ty), align);
 587                         } else {
 588                                 /* TLS */
 589                                 if (visibility == visibility_external_visible) {
 590                                         obstack_printf(comm_obstack, ".globl\t%s\n", ld_name);
 591                                 }
 592                                 dump_object_size(comm_obstack, ld_name, get_type_size_bytes(ty));
 593                                 align = get_type_alignment_bytes(ty);
 594                                 ia32_dump_align(comm_obstack, align);
 595                                 obstack_printf(comm_obstack, "%s:\n\t.zero %d\n", ld_name, get_type_size_bytes(ty));
 596                         }
 597                 }
 598         } /* ! is method type */
 599         else if (ctor_obstack && get_method_img_section(ent) == section_constructors) {
 600                 ia32_dump_align(ctor_obstack, get_type_alignment_bytes(ty));
 601                 dump_size_type(ctor_obstack, get_type_alignment_bytes(ty));
 602                 obstack_printf(ctor_obstack, "%s\n", ld_name);
 603         }
 604 }
 605
 606 /**
 607  * Dumps declarations of global variables and the initialization code.
 608  */
 609 static void ia32_dump_globals(ir_type *gt, ia32_decl_env_t *env)
 610 {
 611         int i, n = get_compound_n_members(gt);
 612
 613         for (i = 0; i < n; i++)
 614                 dump_global(env->main_env, env->rodata_obst, env->data_obst, env->comm_obst, env->ctor_obst,
 615                         get_compound_member(gt, i));
 616 }
 617
 618 /************************************************************************/
 619
 620 void ia32_gen_decls(FILE *out, const be_main_env_t *main_env) {
 621         ia32_decl_env_t env;
 622         obstack_t rodata, data, comm, ctor;
 623         int    size;
 624         char   *cp;
 625
 626         /* dump the global type */
 627         obstack_init(&rodata);
 628         obstack_init(&data);
 629         obstack_init(&comm);
 630
 631         if (main_env->options->opt_profile)
 632                 obstack_init(&ctor);
 633
 634         env.rodata_obst = &rodata;
 635         env.data_obst   = &data;
 636         env.comm_obst   = &comm;
 637         env.ctor_obst   = main_env->options->opt_profile ? &ctor : NULL;
 638         env.main_env    = main_env;
 639
 640         ia32_dump_globals(get_glob_type(), &env);
 641
 642         size = obstack_object_size(&data);
 643         cp   = obstack_finish(&data);
 644         if (size > 0) {
 645                 ia32_switch_section(out, SECTION_DATA);
 646                 fwrite(cp, 1, size, out);
 647         }
 648
 649         size = obstack_object_size(&rodata);
 650         cp   = obstack_finish(&rodata);
 651         if (size > 0) {
 652                 ia32_switch_section(out, SECTION_RODATA);
 653                 fwrite(cp, 1, size, out);
 654         }
 655
 656         size = obstack_object_size(&comm);
 657         cp   = obstack_finish(&comm);
 658         if (size > 0) {
 659                 ia32_switch_section(out, SECTION_COMMON);
 660                 fwrite(cp, 1, size, out);
 661         }
 662
 663         if (main_env->options->opt_profile) {
 664                 size = obstack_object_size(&ctor);
 665                 cp   = obstack_finish(&ctor);
 666                 if (size > 0) {
 667                         ia32_switch_section(out, SECTION_CTOR);
 668                         fwrite(cp, 1, size, out);
 669                 }
 670                 obstack_free(&ctor, NULL);
 671         }
 672
 673         obstack_free(&rodata, NULL);
 674         obstack_free(&data, NULL);
 675         obstack_free(&comm, NULL);
 676
 677         /* dump the Thread Local Storage */
 678         obstack_init(&data);
 679
 680         env.rodata_obst = &data;
 681         env.data_obst   = &data;
 682         env.comm_obst   = &data;
 683         env.ctor_obst   = NULL;
 684
 685         ia32_dump_globals(get_tls_type(), &env);
 686
 687         size = obstack_object_size(&data);
 688         cp   = obstack_finish(&data);
 689         if (size > 0) {
 690                 ia32_switch_section(out, SECTION_TLS);
 691                 ia32_dump_align_f(out, 32);
 692                 fwrite(cp, 1, size, out);
 693         }
 694
 695         obstack_free(&data, NULL);
 696 }