ld/emultempl/ppc64elf.em

   1 # This shell script emits a C file. -*- C -*-
   2 # Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   3 # Free Software Foundation, Inc.
   4 #
   5 # This file is part of the GNU Binutils.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20 # MA 02110-1301, USA.
  21 #
  22
  23 # This file is sourced from elf32.em, and defines extra powerpc64-elf
  24 # specific routines.
  25 #
  26 fragment <<EOF
  27
  28 #include "ldctor.h"
  29 #include "libbfd.h"
  30 #include "elf-bfd.h"
  31 #include "elf64-ppc.h"
  32
  33 /* Fake input file for stubs.  */
  34 static lang_input_statement_type *stub_file;
  35 static int stub_added = 0;
  36
  37 /* Whether we need to call ppc_layout_sections_again.  */
  38 static int need_laying_out = 0;
  39
  40 /* Maximum size of a group of input sections that can be handled by
  41    one stub section.  A value of +/-1 indicates the bfd back-end
  42    should use a suitable default size.  */
  43 static bfd_signed_vma group_size = 1;
  44
  45 /* Whether to add ".foo" entries for each "foo" in a version script.  */
  46 static int dotsyms = 1;
  47
  48 /* Whether to run tls optimization.  */
  49 static int no_tls_opt = 0;
  50 static int no_tls_get_addr_opt = 0;
  51
  52 /* Whether to run opd optimization.  */
  53 static int no_opd_opt = 0;
  54
  55 /* Whether to run toc optimization.  */
  56 static int no_toc_opt = 0;
  57
  58 /* Whether to allow multiple toc sections.  */
  59 static int no_multi_toc = 0;
  60
  61 /* Whether to sort input toc and got sections.  */
  62 static int no_toc_sort = 0;
  63
  64 /* Whether to emit symbols for stubs.  */
  65 static int emit_stub_syms = -1;
  66
  67 static asection *toc_section = 0;
  68
  69 /* Whether to canonicalize .opd so that there are no overlapping
  70    .opd entries.  */
  71 static int non_overlapping_opd = 0;
  72
  73 /* This is called before the input files are opened.  We create a new
  74    fake input file to hold the stub sections.  */
  75
  76 static void
  77 ppc_create_output_section_statements (void)
  78 {
  79   if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
  80         && elf_object_id (link_info.output_bfd) == PPC64_ELF_DATA))
  81     return;
  82
  83   link_info.wrap_char = '.';
  84
  85   stub_file = lang_add_input_file ("linker stubs",
  86                                    lang_input_file_is_fake_enum,
  87                                    NULL);
  88   stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
  89   if (stub_file->the_bfd == NULL
  90       || !bfd_set_arch_mach (stub_file->the_bfd,
  91                              bfd_get_arch (link_info.output_bfd),
  92                              bfd_get_mach (link_info.output_bfd)))
  93     {
  94       einfo ("%F%P: can not create BFD %E\n");
  95       return;
  96     }
  97
  98   stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
  99   ldlang_add_file (stub_file);
 100   ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info);
 101 }
 102
 103 /* Move the input section statement at *U which happens to be on LIST
 104    to be just before *TO.  */
 105
 106 static void
 107 move_input_section (lang_statement_list_type *list,
 108                     lang_statement_union_type **u,
 109                     lang_statement_union_type **to)
 110 {
 111   lang_statement_union_type *s = *u;
 112   asection *i = s->input_section.section;
 113   asection *p, *n;
 114
 115   /* Snip the input section from the statement list.  If it was the
 116      last statement, fix the list tail pointer.  */
 117   *u = s->header.next;
 118   if (*u == NULL)
 119     list->tail = u;
 120   /* Add it back in the new position.  */
 121   s->header.next = *to;
 122   *to = s;
 123   if (list->tail == to)
 124     list->tail = &s->header.next;
 125
 126   /* Trim I off the bfd map_head/map_tail doubly linked lists.  */
 127   n = i->map_head.s;
 128   p = i->map_tail.s;
 129   (p != NULL ? p : i->output_section)->map_head.s = n;
 130   (n != NULL ? n : i->output_section)->map_tail.s = p;
 131
 132   /* Add I back on in its new position.  */
 133   if (s->header.next->header.type == lang_input_section_enum)
 134     {
 135       n = s->header.next->input_section.section;
 136       p = n->map_tail.s;
 137     }
 138   else
 139     {
 140       /* If the next statement is not an input section statement then
 141          TO must point at the previous input section statement
 142          header.next field.  */
 143       lang_input_section_type *prev = (lang_input_section_type *)
 144         ((char *) to - offsetof (lang_statement_union_type, header.next));
 145
 146       ASSERT (prev->header.type == lang_input_section_enum);
 147       p = prev->section;
 148       n = p->map_head.s;
 149     }
 150   i->map_head.s = n;
 151   i->map_tail.s = p;
 152   (p != NULL ? p : i->output_section)->map_head.s = i;
 153   (n != NULL ? n : i->output_section)->map_tail.s = i;
 154 }
 155
 156 /* Sort input section statements in the linker script tree rooted at
 157    LIST so that those whose owning bfd happens to have a section
 158    called .init or .fini are placed first.  Place any TOC sections
 159    referenced by small TOC relocs next, with TOC sections referenced
 160    only by bigtoc relocs last.  */
 161
 162 static void
 163 sort_toc_sections (lang_statement_list_type *list,
 164                    lang_statement_union_type **ini,
 165                    lang_statement_union_type **small)
 166 {
 167   lang_statement_union_type *s, **u;
 168   asection *i;
 169
 170   u = &list->head;
 171   while ((s = *u) != NULL)
 172     {
 173       switch (s->header.type)
 174         {
 175         case lang_wild_statement_enum:
 176           sort_toc_sections (&s->wild_statement.children, ini, small);
 177           break;
 178
 179         case lang_group_statement_enum:
 180           sort_toc_sections (&s->group_statement.children, ini, small);
 181           break;
 182
 183         case lang_input_section_enum:
 184           i = s->input_section.section;
 185           /* Leave the stub_file .got where it is.  We put the .got
 186              header there.  */
 187           if (i->owner == stub_file->the_bfd)
 188             break;
 189           if (bfd_get_section_by_name (i->owner, ".init") != NULL
 190               || bfd_get_section_by_name (i->owner, ".fini") != NULL)
 191             {
 192               if (ini != NULL && *ini != s)
 193                 {
 194                   move_input_section (list, u, ini);
 195                   if (small == ini)
 196                     small = &s->header.next;
 197                   ini = &s->header.next;
 198                   continue;
 199                 }
 200               if (small == ini)
 201                 small = &s->header.next;
 202               ini = &s->header.next;
 203               break;
 204             }
 205           else if (ini == NULL)
 206             ini = u;
 207
 208           if (ppc64_elf_has_small_toc_reloc (i))
 209             {
 210               if (small != NULL && *small != s)
 211                 {
 212                   move_input_section (list, u, small);
 213                   small = &s->header.next;
 214                   continue;
 215                 }
 216               small = &s->header.next;
 217             }
 218           else if (small == NULL)
 219             small = u;
 220           break;
 221
 222         default:
 223           break;
 224         }
 225       u = &s->header.next;
 226     }
 227 }
 228
 229 static void
 230 prelim_size_sections (void)
 231 {
 232   if (expld.phase != lang_mark_phase_enum)
 233     {
 234       expld.phase = lang_mark_phase_enum;
 235       expld.dataseg.phase = exp_dataseg_none;
 236       one_lang_size_sections_pass (NULL, FALSE);
 237       /* We must not cache anything from the preliminary sizing.  */
 238       lang_reset_memory_regions ();
 239     }
 240 }
 241
 242 static void
 243 ppc_before_allocation (void)
 244 {
 245   if (stub_file != NULL)
 246     {
 247       if (!no_opd_opt
 248           && !ppc64_elf_edit_opd (&link_info, non_overlapping_opd))
 249         einfo ("%X%P: can not edit %s %E\n", "opd");
 250
 251       if (ppc64_elf_tls_setup (&link_info, no_tls_get_addr_opt, &no_multi_toc)
 252           && !no_tls_opt)
 253         {
 254           /* Size the sections.  This is premature, but we want to know the
 255              TLS segment layout so that certain optimizations can be done.  */
 256           prelim_size_sections ();
 257
 258           if (!ppc64_elf_tls_optimize (&link_info))
 259             einfo ("%X%P: TLS problem %E\n");
 260         }
 261
 262       if (!no_toc_opt
 263           && !link_info.relocatable)
 264         {
 265           prelim_size_sections ();
 266
 267           if (!ppc64_elf_edit_toc (&link_info))
 268             einfo ("%X%P: can not edit %s %E\n", "toc");
 269         }
 270
 271       if (!no_toc_sort)
 272         {
 273           lang_output_section_statement_type *toc_os;
 274
 275           toc_os = lang_output_section_find (".got");
 276           if (toc_os != NULL)
 277             sort_toc_sections (&toc_os->children, NULL, NULL);
 278         }
 279     }
 280
 281   gld${EMULATION_NAME}_before_allocation ();
 282 }
 283
 284 struct hook_stub_info
 285 {
 286   lang_statement_list_type add;
 287   asection *input_section;
 288 };
 289
 290 /* Traverse the linker tree to find the spot where the stub goes.  */
 291
 292 static bfd_boolean
 293 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
 294 {
 295   lang_statement_union_type *l;
 296   bfd_boolean ret;
 297
 298   for (; (l = *lp) != NULL; lp = &l->header.next)
 299     {
 300       switch (l->header.type)
 301         {
 302         case lang_constructors_statement_enum:
 303           ret = hook_in_stub (info, &constructor_list.head);
 304           if (ret)
 305             return ret;
 306           break;
 307
 308         case lang_output_section_statement_enum:
 309           ret = hook_in_stub (info,
 310                               &l->output_section_statement.children.head);
 311           if (ret)
 312             return ret;
 313           break;
 314
 315         case lang_wild_statement_enum:
 316           ret = hook_in_stub (info, &l->wild_statement.children.head);
 317           if (ret)
 318             return ret;
 319           break;
 320
 321         case lang_group_statement_enum:
 322           ret = hook_in_stub (info, &l->group_statement.children.head);
 323           if (ret)
 324             return ret;
 325           break;
 326
 327         case lang_input_section_enum:
 328           if (l->input_section.section == info->input_section)
 329             {
 330               /* We've found our section.  Insert the stub immediately
 331                  before its associated input section.  */
 332               *lp = info->add.head;
 333               *(info->add.tail) = l;
 334               return TRUE;
 335             }
 336           break;
 337
 338         case lang_data_statement_enum:
 339         case lang_reloc_statement_enum:
 340         case lang_object_symbols_statement_enum:
 341         case lang_output_statement_enum:
 342         case lang_target_statement_enum:
 343         case lang_input_statement_enum:
 344         case lang_assignment_statement_enum:
 345         case lang_padding_statement_enum:
 346         case lang_address_statement_enum:
 347         case lang_fill_statement_enum:
 348           break;
 349
 350         default:
 351           FAIL ();
 352           break;
 353         }
 354     }
 355   return FALSE;
 356 }
 357
 358
 359 /* Call-back for ppc64_elf_size_stubs.  */
 360
 361 /* Create a new stub section, and arrange for it to be linked
 362    immediately before INPUT_SECTION.  */
 363
 364 static asection *
 365 ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
 366 {
 367   asection *stub_sec;
 368   flagword flags;
 369   asection *output_section;
 370   const char *secname;
 371   lang_output_section_statement_type *os;
 372   struct hook_stub_info info;
 373
 374   flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
 375            | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP);
 376   stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
 377                                                  stub_sec_name, flags);
 378   if (stub_sec == NULL)
 379     goto err_ret;
 380
 381   output_section = input_section->output_section;
 382   secname = bfd_get_section_name (output_section->owner, output_section);
 383   os = lang_output_section_find (secname);
 384
 385   info.input_section = input_section;
 386   lang_list_init (&info.add);
 387   lang_add_section (&info.add, stub_sec, os);
 388
 389   if (info.add.head == NULL)
 390     goto err_ret;
 391
 392   stub_added = 1;
 393   if (hook_in_stub (&info, &os->children.head))
 394     return stub_sec;
 395
 396  err_ret:
 397   einfo ("%X%P: can not make stub section: %E\n");
 398   return NULL;
 399 }
 400
 401
 402 /* Another call-back for ppc64_elf_size_stubs.  */
 403
 404 static void
 405 ppc_layout_sections_again (void)
 406 {
 407   /* If we have changed sizes of the stub sections, then we need
 408      to recalculate all the section offsets.  This may mean we need to
 409      add even more stubs.  */
 410   gld${EMULATION_NAME}_map_segments (TRUE);
 411
 412   if (!link_info.relocatable)
 413     _bfd_set_gp_value (link_info.output_bfd,
 414                        ppc64_elf_toc (link_info.output_bfd));
 415
 416   need_laying_out = -1;
 417 }
 418
 419
 420 static void
 421 build_toc_list (lang_statement_union_type *statement)
 422 {
 423   if (statement->header.type == lang_input_section_enum)
 424     {
 425       asection *i = statement->input_section.section;
 426
 427       if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
 428           && (i->flags & SEC_EXCLUDE) == 0
 429           && i->output_section == toc_section)
 430         {
 431           if (!ppc64_elf_next_toc_section (&link_info, i))
 432             einfo ("%X%P: linker script separates .got and .toc\n");
 433         }
 434     }
 435 }
 436
 437
 438 static void
 439 build_section_lists (lang_statement_union_type *statement)
 440 {
 441   if (statement->header.type == lang_input_section_enum)
 442     {
 443       asection *i = statement->input_section.section;
 444
 445       if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
 446           && (i->flags & SEC_EXCLUDE) == 0
 447           && i->output_section != NULL
 448           && i->output_section->owner == link_info.output_bfd)
 449         {
 450           if (!ppc64_elf_next_input_section (&link_info, i))
 451             einfo ("%X%P: can not size stub section: %E\n");
 452         }
 453     }
 454 }
 455
 456
 457 /* Call the back-end function to set TOC base after we have placed all
 458    the sections.  */
 459 static void
 460 gld${EMULATION_NAME}_after_allocation (void)
 461 {
 462   /* bfd_elf_discard_info just plays with data and debugging sections,
 463      ie. doesn't affect code size, so we can delay resizing the
 464      sections.  It's likely we'll resize everything in the process of
 465      adding stubs.  */
 466   if (bfd_elf_discard_info (link_info.output_bfd, &link_info))
 467     need_laying_out = 1;
 468
 469   /* If generating a relocatable output file, then we don't have any
 470      stubs.  */
 471   if (stub_file != NULL && !link_info.relocatable)
 472     {
 473       int ret = ppc64_elf_setup_section_lists (&link_info,
 474                                                &ppc_add_stub_section,
 475                                                &ppc_layout_sections_again);
 476       if (ret < 0)
 477         einfo ("%X%P: can not size stub section: %E\n");
 478       else if (ret > 0)
 479         {
 480           ppc64_elf_start_multitoc_partition (&link_info);
 481
 482           if (!no_multi_toc)
 483             {
 484               toc_section = bfd_get_section_by_name (link_info.output_bfd,
 485                                                      ".got");
 486               if (toc_section != NULL)
 487                 lang_for_each_statement (build_toc_list);
 488             }
 489
 490           if (ppc64_elf_layout_multitoc (&link_info)
 491               && !no_multi_toc
 492               && toc_section != NULL)
 493             lang_for_each_statement (build_toc_list);
 494
 495           ppc64_elf_finish_multitoc_partition (&link_info);
 496
 497           lang_for_each_statement (build_section_lists);
 498
 499           if (!ppc64_elf_check_init_fini (&link_info))
 500             einfo ("%P: .init/.fini fragments use differing TOC pointers\n");
 501
 502           /* Call into the BFD backend to do the real work.  */
 503           if (!ppc64_elf_size_stubs (&link_info, group_size))
 504             einfo ("%X%P: can not size stub section: %E\n");
 505         }
 506     }
 507
 508   if (need_laying_out != -1)
 509     {
 510       gld${EMULATION_NAME}_map_segments (need_laying_out);
 511
 512       if (!link_info.relocatable)
 513         _bfd_set_gp_value (link_info.output_bfd,
 514                            ppc64_elf_toc (link_info.output_bfd));
 515     }
 516 }
 517
 518
 519 /* Final emulation specific call.  */
 520
 521 static void
 522 gld${EMULATION_NAME}_finish (void)
 523 {
 524   /* e_entry on PowerPC64 points to the function descriptor for
 525      _start.  If _start is missing, default to the first function
 526      descriptor in the .opd section.  */
 527   entry_section = ".opd";
 528
 529   if (link_info.relocatable)
 530     {
 531       asection *toc = bfd_get_section_by_name (link_info.output_bfd, ".toc");
 532       if (toc != NULL
 533           && bfd_section_size (link_info.output_bfd, toc) > 0x10000)
 534         einfo ("%X%P: TOC section size exceeds 64k\n");
 535     }
 536
 537   if (stub_added)
 538     {
 539       char *msg = NULL;
 540       char *line, *endline;
 541
 542       if (emit_stub_syms < 0)
 543         emit_stub_syms = 1;
 544       if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info,
 545                                   config.stats ? &msg : NULL))
 546         einfo ("%X%P: can not build stubs: %E\n");
 547
 548       for (line = msg; line != NULL; line = endline)
 549         {
 550           endline = strchr (line, '\n');
 551           if (endline != NULL)
 552             *endline++ = '\0';
 553           fprintf (stderr, "%s: %s\n", program_name, line);
 554         }
 555       if (msg != NULL)
 556         free (msg);
 557     }
 558
 559   ppc64_elf_restore_symbols (&link_info);
 560   finish_default ();
 561 }
 562
 563
 564 /* Add a pattern matching ".foo" for every "foo" in a version script.
 565
 566    The reason for doing this is that many shared library version
 567    scripts export a selected set of functions or data symbols, forcing
 568    others local.  eg.
 569
 570    . VERS_1 {
 571    .       global:
 572    .               this; that; some; thing;
 573    .       local:
 574    .               *;
 575    .   };
 576
 577    To make the above work for PowerPC64, we need to export ".this",
 578    ".that" and so on, otherwise only the function descriptor syms are
 579    exported.  Lack of an exported function code sym may cause a
 580    definition to be pulled in from a static library.  */
 581
 582 static struct bfd_elf_version_expr *
 583 gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry)
 584 {
 585   struct bfd_elf_version_expr *dot_entry;
 586   unsigned int len;
 587   char *dot_pat;
 588
 589   if (!dotsyms
 590       || entry->pattern[0] == '.'
 591       || (!entry->literal && entry->pattern[0] == '*'))
 592     return entry;
 593
 594   dot_entry = xmalloc (sizeof *dot_entry);
 595   *dot_entry = *entry;
 596   dot_entry->next = entry;
 597   len = strlen (entry->pattern) + 2;
 598   dot_pat = xmalloc (len);
 599   dot_pat[0] = '.';
 600   memcpy (dot_pat + 1, entry->pattern, len - 1);
 601   dot_entry->pattern = dot_pat;
 602   dot_entry->script = 1;
 603   return dot_entry;
 604 }
 605
 606
 607 /* Avoid processing the fake stub_file in vercheck, stat_needed and
 608    check_needed routines.  */
 609
 610 static void (*real_func) (lang_input_statement_type *);
 611
 612 static void ppc_for_each_input_file_wrapper (lang_input_statement_type *l)
 613 {
 614   if (l != stub_file)
 615     (*real_func) (l);
 616 }
 617
 618 static void
 619 ppc_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
 620 {
 621   real_func = func;
 622   lang_for_each_input_file (&ppc_for_each_input_file_wrapper);
 623 }
 624
 625 #define lang_for_each_input_file ppc_lang_for_each_input_file
 626
 627 EOF
 628
 629 if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then
 630   fragment <<EOF
 631 /* Special handling for embedded SPU executables.  */
 632 extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);
 633 static bfd_boolean gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *);
 634
 635 static bfd_boolean
 636 ppc64_recognized_file (lang_input_statement_type *entry)
 637 {
 638   if (embedded_spu_file (entry, "-m64"))
 639     return TRUE;
 640
 641   return gld${EMULATION_NAME}_load_symbols (entry);
 642 }
 643 EOF
 644 LDEMUL_RECOGNIZED_FILE=ppc64_recognized_file
 645 fi
 646
 647 # Define some shell vars to insert bits of code into the standard elf
 648 # parse_args and list_options functions.
 649 #
 650 PARSE_AND_LIST_PROLOGUE='
 651 #define OPTION_STUBGROUP_SIZE           301
 652 #define OPTION_STUBSYMS                 (OPTION_STUBGROUP_SIZE + 1)
 653 #define OPTION_NO_STUBSYMS              (OPTION_STUBSYMS + 1)
 654 #define OPTION_DOTSYMS                  (OPTION_NO_STUBSYMS + 1)
 655 #define OPTION_NO_DOTSYMS               (OPTION_DOTSYMS + 1)
 656 #define OPTION_NO_TLS_OPT               (OPTION_NO_DOTSYMS + 1)
 657 #define OPTION_NO_TLS_GET_ADDR_OPT      (OPTION_NO_TLS_OPT + 1)
 658 #define OPTION_NO_OPD_OPT               (OPTION_NO_TLS_GET_ADDR_OPT + 1)
 659 #define OPTION_NO_TOC_OPT               (OPTION_NO_OPD_OPT + 1)
 660 #define OPTION_NO_MULTI_TOC             (OPTION_NO_TOC_OPT + 1)
 661 #define OPTION_NO_TOC_SORT              (OPTION_NO_MULTI_TOC + 1)
 662 #define OPTION_NON_OVERLAPPING_OPD      (OPTION_NO_TOC_SORT + 1)
 663 '
 664
 665 PARSE_AND_LIST_LONGOPTS='
 666   { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
 667   { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
 668   { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS },
 669   { "dotsyms", no_argument, NULL, OPTION_DOTSYMS },
 670   { "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS },
 671   { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
 672   { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT },
 673   { "no-opd-optimize", no_argument, NULL, OPTION_NO_OPD_OPT },
 674   { "no-toc-optimize", no_argument, NULL, OPTION_NO_TOC_OPT },
 675   { "no-multi-toc", no_argument, NULL, OPTION_NO_MULTI_TOC },
 676   { "no-toc-sort", no_argument, NULL, OPTION_NO_TOC_SORT },
 677   { "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD },
 678 '
 679
 680 PARSE_AND_LIST_OPTIONS='
 681   fprintf (file, _("\
 682   --stub-group-size=N         Maximum size of a group of input sections that\n\
 683                                 can be handled by one stub section.  A negative\n\
 684                                 value locates all stubs before their branches\n\
 685                                 (with a group size of -N), while a positive\n\
 686                                 value allows two groups of input sections, one\n\
 687                                 before, and one after each stub section.\n\
 688                                 Values of +/-1 indicate the linker should\n\
 689                                 choose suitable defaults.\n"
 690                    ));
 691   fprintf (file, _("\
 692   --emit-stub-syms            Label linker stubs with a symbol.\n"
 693                    ));
 694   fprintf (file, _("\
 695   --no-emit-stub-syms         Don'\''t label linker stubs with a symbol.\n"
 696                    ));
 697   fprintf (file, _("\
 698   --dotsyms                   For every version pattern \"foo\" in a version\n\
 699                                 script, add \".foo\" so that function code\n\
 700                                 symbols are treated the same as function\n\
 701                                 descriptor symbols.  Defaults to on.\n"
 702                    ));
 703   fprintf (file, _("\
 704   --no-dotsyms                Don'\''t do anything special in version scripts.\n"
 705                    ));
 706   fprintf (file, _("\
 707   --no-tls-optimize           Don'\''t try to optimize TLS accesses.\n"
 708                    ));
 709   fprintf (file, _("\
 710   --no-tls-get-addr-optimize  Don'\''t use a special __tls_get_addr call.\n"
 711                    ));
 712   fprintf (file, _("\
 713   --no-opd-optimize           Don'\''t optimize the OPD section.\n"
 714                    ));
 715   fprintf (file, _("\
 716   --no-toc-optimize           Don'\''t optimize the TOC section.\n"
 717                    ));
 718   fprintf (file, _("\
 719   --no-multi-toc              Disallow automatic multiple toc sections.\n"
 720                    ));
 721   fprintf (file, _("\
 722   --no-toc-sort               Don'\''t sort TOC and GOT sections.\n"
 723                    ));
 724   fprintf (file, _("\
 725   --non-overlapping-opd       Canonicalize .opd, so that there are no\n\
 726                                 overlapping .opd entries.\n"
 727                    ));
 728 '
 729
 730 PARSE_AND_LIST_ARGS_CASES='
 731     case OPTION_STUBGROUP_SIZE:
 732       {
 733         const char *end;
 734         group_size = bfd_scan_vma (optarg, &end, 0);
 735         if (*end)
 736           einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
 737       }
 738       break;
 739
 740     case OPTION_STUBSYMS:
 741       emit_stub_syms = 1;
 742       break;
 743
 744     case OPTION_NO_STUBSYMS:
 745       emit_stub_syms = 0;
 746       break;
 747
 748     case OPTION_DOTSYMS:
 749       dotsyms = 1;
 750       break;
 751
 752     case OPTION_NO_DOTSYMS:
 753       dotsyms = 0;
 754       break;
 755
 756     case OPTION_NO_TLS_OPT:
 757       no_tls_opt = 1;
 758       break;
 759
 760     case OPTION_NO_TLS_GET_ADDR_OPT:
 761       no_tls_get_addr_opt = 1;
 762       break;
 763
 764     case OPTION_NO_OPD_OPT:
 765       no_opd_opt = 1;
 766       break;
 767
 768     case OPTION_NO_TOC_OPT:
 769       no_toc_opt = 1;
 770       break;
 771
 772     case OPTION_NO_MULTI_TOC:
 773       no_multi_toc = 1;
 774       break;
 775
 776     case OPTION_NO_TOC_SORT:
 777       no_toc_sort = 1;
 778       break;
 779
 780     case OPTION_NON_OVERLAPPING_OPD:
 781       non_overlapping_opd = 1;
 782       break;
 783 '
 784
 785 # Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation
 786 #
 787 LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
 788 LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
 789 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
 790 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_create_output_section_statements
 791 LDEMUL_NEW_VERS_PATTERN=gld${EMULATION_NAME}_new_vers_pattern