ld/emultempl/ppc64elf.em

   1 # This shell script emits a C file. -*- C -*-
   2 # Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   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 /* Set if PLT call stubs should load r11.  */
  65 static int plt_static_chain = 0;
  66
  67 /* Whether to emit symbols for stubs.  */
  68 static int emit_stub_syms = -1;
  69
  70 static asection *toc_section = 0;
  71
  72 /* Whether to canonicalize .opd so that there are no overlapping
  73    .opd entries.  */
  74 static int non_overlapping_opd = 0;
  75
  76 /* This is called before the input files are opened.  We create a new
  77    fake input file to hold the stub sections.  */
  78
  79 static void
  80 ppc_create_output_section_statements (void)
  81 {
  82   if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
  83         && elf_object_id (link_info.output_bfd) == PPC64_ELF_DATA))
  84     return;
  85
  86   link_info.wrap_char = '.';
  87
  88   stub_file = lang_add_input_file ("linker stubs",
  89                                    lang_input_file_is_fake_enum,
  90                                    NULL);
  91   stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
  92   if (stub_file->the_bfd == NULL
  93       || !bfd_set_arch_mach (stub_file->the_bfd,
  94                              bfd_get_arch (link_info.output_bfd),
  95                              bfd_get_mach (link_info.output_bfd)))
  96     {
  97       einfo ("%F%P: can not create BFD: %E\n");
  98       return;
  99     }
 100
 101   stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
 102   ldlang_add_file (stub_file);
 103   ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info);
 104 }
 105
 106 /* Move the input section statement at *U which happens to be on LIST
 107    to be just before *TO.  */
 108
 109 static void
 110 move_input_section (lang_statement_list_type *list,
 111                     lang_statement_union_type **u,
 112                     lang_statement_union_type **to)
 113 {
 114   lang_statement_union_type *s = *u;
 115   asection *i = s->input_section.section;
 116   asection *p, *n;
 117
 118   /* Snip the input section from the statement list.  If it was the
 119      last statement, fix the list tail pointer.  */
 120   *u = s->header.next;
 121   if (*u == NULL)
 122     list->tail = u;
 123   /* Add it back in the new position.  */
 124   s->header.next = *to;
 125   *to = s;
 126   if (list->tail == to)
 127     list->tail = &s->header.next;
 128
 129   /* Trim I off the bfd map_head/map_tail doubly linked lists.  */
 130   n = i->map_head.s;
 131   p = i->map_tail.s;
 132   (p != NULL ? p : i->output_section)->map_head.s = n;
 133   (n != NULL ? n : i->output_section)->map_tail.s = p;
 134
 135   /* Add I back on in its new position.  */
 136   if (s->header.next->header.type == lang_input_section_enum)
 137     {
 138       n = s->header.next->input_section.section;
 139       p = n->map_tail.s;
 140     }
 141   else
 142     {
 143       /* If the next statement is not an input section statement then
 144          TO must point at the previous input section statement
 145          header.next field.  */
 146       lang_input_section_type *prev = (lang_input_section_type *)
 147         ((char *) to - offsetof (lang_statement_union_type, header.next));
 148
 149       ASSERT (prev->header.type == lang_input_section_enum);
 150       p = prev->section;
 151       n = p->map_head.s;
 152     }
 153   i->map_head.s = n;
 154   i->map_tail.s = p;
 155   (p != NULL ? p : i->output_section)->map_head.s = i;
 156   (n != NULL ? n : i->output_section)->map_tail.s = i;
 157 }
 158
 159 /* Sort input section statements in the linker script tree rooted at
 160    LIST so that those whose owning bfd happens to have a section
 161    called .init or .fini are placed first.  Place any TOC sections
 162    referenced by small TOC relocs next, with TOC sections referenced
 163    only by bigtoc relocs last.  */
 164
 165 static void
 166 sort_toc_sections (lang_statement_list_type *list,
 167                    lang_statement_union_type **ini,
 168                    lang_statement_union_type **small)
 169 {
 170   lang_statement_union_type *s, **u;
 171   asection *i;
 172
 173   u = &list->head;
 174   while ((s = *u) != NULL)
 175     {
 176       switch (s->header.type)
 177         {
 178         case lang_wild_statement_enum:
 179           sort_toc_sections (&s->wild_statement.children, ini, small);
 180           break;
 181
 182         case lang_group_statement_enum:
 183           sort_toc_sections (&s->group_statement.children, ini, small);
 184           break;
 185
 186         case lang_input_section_enum:
 187           i = s->input_section.section;
 188           /* Leave the stub_file .got where it is.  We put the .got
 189              header there.  */
 190           if (i->owner == stub_file->the_bfd)
 191             break;
 192           if (bfd_get_section_by_name (i->owner, ".init") != NULL
 193               || bfd_get_section_by_name (i->owner, ".fini") != NULL)
 194             {
 195               if (ini != NULL && *ini != s)
 196                 {
 197                   move_input_section (list, u, ini);
 198                   if (small == ini)
 199                     small = &s->header.next;
 200                   ini = &s->header.next;
 201                   continue;
 202                 }
 203               if (small == ini)
 204                 small = &s->header.next;
 205               ini = &s->header.next;
 206               break;
 207             }
 208           else if (ini == NULL)
 209             ini = u;
 210
 211           if (ppc64_elf_has_small_toc_reloc (i))
 212             {
 213               if (small != NULL && *small != s)
 214                 {
 215                   move_input_section (list, u, small);
 216                   small = &s->header.next;
 217                   continue;
 218                 }
 219               small = &s->header.next;
 220             }
 221           else if (small == NULL)
 222             small = u;
 223           break;
 224
 225         default:
 226           break;
 227         }
 228       u = &s->header.next;
 229     }
 230 }
 231
 232 static void
 233 prelim_size_sections (void)
 234 {
 235   if (expld.phase != lang_mark_phase_enum)
 236     {
 237       expld.phase = lang_mark_phase_enum;
 238       expld.dataseg.phase = exp_dataseg_none;
 239       one_lang_size_sections_pass (NULL, FALSE);
 240       /* We must not cache anything from the preliminary sizing.  */
 241       lang_reset_memory_regions ();
 242     }
 243 }
 244
 245 static void
 246 ppc_before_allocation (void)
 247 {
 248   if (stub_file != NULL)
 249     {
 250       if (!no_opd_opt
 251           && !ppc64_elf_edit_opd (&link_info, non_overlapping_opd))
 252         einfo ("%X%P: can not edit %s: %E\n", "opd");
 253
 254       if (ppc64_elf_tls_setup (&link_info, no_tls_get_addr_opt, &no_multi_toc)
 255           && !no_tls_opt)
 256         {
 257           /* Size the sections.  This is premature, but we want to know the
 258              TLS segment layout so that certain optimizations can be done.  */
 259           prelim_size_sections ();
 260
 261           if (!ppc64_elf_tls_optimize (&link_info))
 262             einfo ("%X%P: TLS problem %E\n");
 263         }
 264
 265       if (!no_toc_opt
 266           && !link_info.relocatable)
 267         {
 268           prelim_size_sections ();
 269
 270           if (!ppc64_elf_edit_toc (&link_info))
 271             einfo ("%X%P: can not edit %s: %E\n", "toc");
 272         }
 273
 274       if (!no_toc_sort)
 275         {
 276           lang_output_section_statement_type *toc_os;
 277
 278           toc_os = lang_output_section_find (".got");
 279           if (toc_os != NULL)
 280             sort_toc_sections (&toc_os->children, NULL, NULL);
 281         }
 282     }
 283
 284   gld${EMULATION_NAME}_before_allocation ();
 285 }
 286
 287 struct hook_stub_info
 288 {
 289   lang_statement_list_type add;
 290   asection *input_section;
 291 };
 292
 293 /* Traverse the linker tree to find the spot where the stub goes.  */
 294
 295 static bfd_boolean
 296 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
 297 {
 298   lang_statement_union_type *l;
 299   bfd_boolean ret;
 300
 301   for (; (l = *lp) != NULL; lp = &l->header.next)
 302     {
 303       switch (l->header.type)
 304         {
 305         case lang_constructors_statement_enum:
 306           ret = hook_in_stub (info, &constructor_list.head);
 307           if (ret)
 308             return ret;
 309           break;
 310
 311         case lang_output_section_statement_enum:
 312           ret = hook_in_stub (info,
 313                               &l->output_section_statement.children.head);
 314           if (ret)
 315             return ret;
 316           break;
 317
 318         case lang_wild_statement_enum:
 319           ret = hook_in_stub (info, &l->wild_statement.children.head);
 320           if (ret)
 321             return ret;
 322           break;
 323
 324         case lang_group_statement_enum:
 325           ret = hook_in_stub (info, &l->group_statement.children.head);
 326           if (ret)
 327             return ret;
 328           break;
 329
 330         case lang_input_section_enum:
 331           if (l->input_section.section == info->input_section)
 332             {
 333               /* We've found our section.  Insert the stub immediately
 334                  before its associated input section.  */
 335               *lp = info->add.head;
 336               *(info->add.tail) = l;
 337               return TRUE;
 338             }
 339           break;
 340
 341         case lang_data_statement_enum:
 342         case lang_reloc_statement_enum:
 343         case lang_object_symbols_statement_enum:
 344         case lang_output_statement_enum:
 345         case lang_target_statement_enum:
 346         case lang_input_statement_enum:
 347         case lang_assignment_statement_enum:
 348         case lang_padding_statement_enum:
 349         case lang_address_statement_enum:
 350         case lang_fill_statement_enum:
 351           break;
 352
 353         default:
 354           FAIL ();
 355           break;
 356         }
 357     }
 358   return FALSE;
 359 }
 360
 361
 362 /* Call-back for ppc64_elf_size_stubs.  */
 363
 364 /* Create a new stub section, and arrange for it to be linked
 365    immediately before INPUT_SECTION.  */
 366
 367 static asection *
 368 ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
 369 {
 370   asection *stub_sec;
 371   flagword flags;
 372   asection *output_section;
 373   const char *secname;
 374   lang_output_section_statement_type *os;
 375   struct hook_stub_info info;
 376
 377   flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
 378            | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP);
 379   stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
 380                                                  stub_sec_name, flags);
 381   if (stub_sec == NULL
 382       || !bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 5))
 383     goto err_ret;
 384
 385   output_section = input_section->output_section;
 386   secname = bfd_get_section_name (output_section->owner, output_section);
 387   os = lang_output_section_find (secname);
 388
 389   info.input_section = input_section;
 390   lang_list_init (&info.add);
 391   lang_add_section (&info.add, stub_sec, os);
 392
 393   if (info.add.head == NULL)
 394     goto err_ret;
 395
 396   stub_added = 1;
 397   if (hook_in_stub (&info, &os->children.head))
 398     return stub_sec;
 399
 400  err_ret:
 401   einfo ("%X%P: can not make stub section: %E\n");
 402   return NULL;
 403 }
 404
 405
 406 /* Another call-back for ppc64_elf_size_stubs.  */
 407
 408 static void
 409 ppc_layout_sections_again (void)
 410 {
 411   /* If we have changed sizes of the stub sections, then we need
 412      to recalculate all the section offsets.  This may mean we need to
 413      add even more stubs.  */
 414   gld${EMULATION_NAME}_map_segments (TRUE);
 415
 416   if (!link_info.relocatable)
 417     _bfd_set_gp_value (link_info.output_bfd,
 418                        ppc64_elf_toc (link_info.output_bfd));
 419
 420   need_laying_out = -1;
 421 }
 422
 423
 424 static void
 425 build_toc_list (lang_statement_union_type *statement)
 426 {
 427   if (statement->header.type == lang_input_section_enum)
 428     {
 429       asection *i = statement->input_section.section;
 430
 431       if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
 432           && (i->flags & SEC_EXCLUDE) == 0
 433           && i->output_section == toc_section)
 434         {
 435           if (!ppc64_elf_next_toc_section (&link_info, i))
 436             einfo ("%X%P: linker script separates .got and .toc\n");
 437         }
 438     }
 439 }
 440
 441
 442 static void
 443 build_section_lists (lang_statement_union_type *statement)
 444 {
 445   if (statement->header.type == lang_input_section_enum)
 446     {
 447       asection *i = statement->input_section.section;
 448
 449       if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
 450           && (i->flags & SEC_EXCLUDE) == 0
 451           && i->output_section != NULL
 452           && i->output_section->owner == link_info.output_bfd)
 453         {
 454           if (!ppc64_elf_next_input_section (&link_info, i))
 455             einfo ("%X%P: can not size stub section: %E\n");
 456         }
 457     }
 458 }
 459
 460
 461 /* Call the back-end function to set TOC base after we have placed all
 462    the sections.  */
 463 static void
 464 gld${EMULATION_NAME}_after_allocation (void)
 465 {
 466   /* bfd_elf_discard_info just plays with data and debugging sections,
 467      ie. doesn't affect code size, so we can delay resizing the
 468      sections.  It's likely we'll resize everything in the process of
 469      adding stubs.  */
 470   if (bfd_elf_discard_info (link_info.output_bfd, &link_info))
 471     need_laying_out = 1;
 472
 473   /* If generating a relocatable output file, then we don't have any
 474      stubs.  */
 475   if (stub_file != NULL && !link_info.relocatable)
 476     {
 477       int ret = ppc64_elf_setup_section_lists (&link_info,
 478                                                &ppc_add_stub_section,
 479                                                &ppc_layout_sections_again);
 480       if (ret < 0)
 481         einfo ("%X%P: can not size stub section: %E\n");
 482       else if (ret > 0)
 483         {
 484           ppc64_elf_start_multitoc_partition (&link_info);
 485
 486           if (!no_multi_toc)
 487             {
 488               toc_section = bfd_get_section_by_name (link_info.output_bfd,
 489                                                      ".got");
 490               if (toc_section != NULL)
 491                 lang_for_each_statement (build_toc_list);
 492             }
 493
 494           if (ppc64_elf_layout_multitoc (&link_info)
 495               && !no_multi_toc
 496               && toc_section != NULL)
 497             lang_for_each_statement (build_toc_list);
 498
 499           ppc64_elf_finish_multitoc_partition (&link_info);
 500
 501           lang_for_each_statement (build_section_lists);
 502
 503           if (!ppc64_elf_check_init_fini (&link_info))
 504             einfo ("%P: .init/.fini fragments use differing TOC pointers\n");
 505
 506           /* Call into the BFD backend to do the real work.  */
 507           if (!ppc64_elf_size_stubs (&link_info, group_size, plt_static_chain))
 508             einfo ("%X%P: can not size stub section: %E\n");
 509         }
 510     }
 511
 512   if (need_laying_out != -1)
 513     {
 514       gld${EMULATION_NAME}_map_segments (need_laying_out);
 515
 516       if (!link_info.relocatable)
 517         _bfd_set_gp_value (link_info.output_bfd,
 518                            ppc64_elf_toc (link_info.output_bfd));
 519     }
 520 }
 521
 522
 523 /* Final emulation specific call.  */
 524
 525 static void
 526 gld${EMULATION_NAME}_finish (void)
 527 {
 528   /* e_entry on PowerPC64 points to the function descriptor for
 529      _start.  If _start is missing, default to the first function
 530      descriptor in the .opd section.  */
 531   entry_section = ".opd";
 532
 533   if (stub_added)
 534     {
 535       char *msg = NULL;
 536       char *line, *endline;
 537
 538       if (emit_stub_syms < 0)
 539         emit_stub_syms = 1;
 540       if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info,
 541                                   config.stats ? &msg : NULL))
 542         einfo ("%X%P: can not build stubs: %E\n");
 543
 544       fflush (stdout);
 545       for (line = msg; line != NULL; line = endline)
 546         {
 547           endline = strchr (line, '\n');
 548           if (endline != NULL)
 549             *endline++ = '\0';
 550           fprintf (stderr, "%s: %s\n", program_name, line);
 551         }
 552       fflush (stderr);
 553       if (msg != NULL)
 554         free (msg);
 555     }
 556
 557   ppc64_elf_restore_symbols (&link_info);
 558   finish_default ();
 559 }
 560
 561
 562 /* Add a pattern matching ".foo" for every "foo" in a version script.
 563
 564    The reason for doing this is that many shared library version
 565    scripts export a selected set of functions or data symbols, forcing
 566    others local.  eg.
 567
 568    . VERS_1 {
 569    .       global:
 570    .               this; that; some; thing;
 571    .       local:
 572    .               *;
 573    .   };
 574
 575    To make the above work for PowerPC64, we need to export ".this",
 576    ".that" and so on, otherwise only the function descriptor syms are
 577    exported.  Lack of an exported function code sym may cause a
 578    definition to be pulled in from a static library.  */
 579
 580 static struct bfd_elf_version_expr *
 581 gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry)
 582 {
 583   struct bfd_elf_version_expr *dot_entry;
 584   unsigned int len;
 585   char *dot_pat;
 586
 587   if (!dotsyms
 588       || entry->pattern[0] == '.'
 589       || (!entry->literal && entry->pattern[0] == '*'))
 590     return entry;
 591
 592   dot_entry = xmalloc (sizeof *dot_entry);
 593   *dot_entry = *entry;
 594   dot_entry->next = entry;
 595   len = strlen (entry->pattern) + 2;
 596   dot_pat = xmalloc (len);
 597   dot_pat[0] = '.';
 598   memcpy (dot_pat + 1, entry->pattern, len - 1);
 599   dot_entry->pattern = dot_pat;
 600   dot_entry->script = 1;
 601   return dot_entry;
 602 }
 603
 604
 605 /* Avoid processing the fake stub_file in vercheck, stat_needed and
 606    check_needed routines.  */
 607
 608 static void (*real_func) (lang_input_statement_type *);
 609
 610 static void ppc_for_each_input_file_wrapper (lang_input_statement_type *l)
 611 {
 612   if (l != stub_file)
 613     (*real_func) (l);
 614 }
 615
 616 static void
 617 ppc_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
 618 {
 619   real_func = func;
 620   lang_for_each_input_file (&ppc_for_each_input_file_wrapper);
 621 }
 622
 623 #define lang_for_each_input_file ppc_lang_for_each_input_file
 624
 625 EOF
 626
 627 if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then
 628   fragment <<EOF
 629 /* Special handling for embedded SPU executables.  */
 630 extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);
 631 static bfd_boolean gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *);
 632
 633 static bfd_boolean
 634 ppc64_recognized_file (lang_input_statement_type *entry)
 635 {
 636   if (embedded_spu_file (entry, "-m64"))
 637     return TRUE;
 638
 639   return gld${EMULATION_NAME}_load_symbols (entry);
 640 }
 641 EOF
 642 LDEMUL_RECOGNIZED_FILE=ppc64_recognized_file
 643 fi
 644
 645 # Define some shell vars to insert bits of code into the standard elf
 646 # parse_args and list_options functions.
 647 #
 648 PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}'
 649 #define OPTION_STUBGROUP_SIZE           321
 650 #define OPTION_PLT_STATIC_CHAIN         (OPTION_STUBGROUP_SIZE + 1)
 651 #define OPTION_NO_PLT_STATIC_CHAIN      (OPTION_PLT_STATIC_CHAIN + 1)
 652 #define OPTION_STUBSYMS                 (OPTION_NO_PLT_STATIC_CHAIN + 1)
 653 #define OPTION_NO_STUBSYMS              (OPTION_STUBSYMS + 1)
 654 #define OPTION_DOTSYMS                  (OPTION_NO_STUBSYMS + 1)
 655 #define OPTION_NO_DOTSYMS               (OPTION_DOTSYMS + 1)
 656 #define OPTION_NO_TLS_OPT               (OPTION_NO_DOTSYMS + 1)
 657 #define OPTION_NO_TLS_GET_ADDR_OPT      (OPTION_NO_TLS_OPT + 1)
 658 #define OPTION_NO_OPD_OPT               (OPTION_NO_TLS_GET_ADDR_OPT + 1)
 659 #define OPTION_NO_TOC_OPT               (OPTION_NO_OPD_OPT + 1)
 660 #define OPTION_NO_MULTI_TOC             (OPTION_NO_TOC_OPT + 1)
 661 #define OPTION_NO_TOC_SORT              (OPTION_NO_MULTI_TOC + 1)
 662 #define OPTION_NON_OVERLAPPING_OPD      (OPTION_NO_TOC_SORT + 1)
 663 '
 664
 665 PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
 666   { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
 667   { "plt-static-chain", no_argument, NULL, OPTION_PLT_STATIC_CHAIN },
 668   { "no-plt-static-chain", no_argument, NULL, OPTION_NO_PLT_STATIC_CHAIN },
 669   { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
 670   { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS },
 671   { "dotsyms", no_argument, NULL, OPTION_DOTSYMS },
 672   { "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS },
 673   { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
 674   { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT },
 675   { "no-opd-optimize", no_argument, NULL, OPTION_NO_OPD_OPT },
 676   { "no-toc-optimize", no_argument, NULL, OPTION_NO_TOC_OPT },
 677   { "no-multi-toc", no_argument, NULL, OPTION_NO_MULTI_TOC },
 678   { "no-toc-sort", no_argument, NULL, OPTION_NO_TOC_SORT },
 679   { "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD },
 680 '
 681
 682 PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}'
 683   fprintf (file, _("\
 684   --stub-group-size=N         Maximum size of a group of input sections that\n\
 685                                 can be handled by one stub section.  A negative\n\
 686                                 value locates all stubs before their branches\n\
 687                                 (with a group size of -N), while a positive\n\
 688                                 value allows two groups of input sections, one\n\
 689                                 before, and one after each stub section.\n\
 690                                 Values of +/-1 indicate the linker should\n\
 691                                 choose suitable defaults.\n"
 692                    ));
 693   fprintf (file, _("\
 694   --plt-static-chain          PLT call stubs should load r11.\n"
 695                    ));
 696   fprintf (file, _("\
 697   --no-plt-static-chain       PLT call stubs should not load r11. (default)\n"
 698                    ));
 699   fprintf (file, _("\
 700   --emit-stub-syms            Label linker stubs with a symbol.\n"
 701                    ));
 702   fprintf (file, _("\
 703   --no-emit-stub-syms         Don'\''t label linker stubs with a symbol.\n"
 704                    ));
 705   fprintf (file, _("\
 706   --dotsyms                   For every version pattern \"foo\" in a version\n\
 707                                 script, add \".foo\" so that function code\n\
 708                                 symbols are treated the same as function\n\
 709                                 descriptor symbols.  Defaults to on.\n"
 710                    ));
 711   fprintf (file, _("\
 712   --no-dotsyms                Don'\''t do anything special in version scripts.\n"
 713                    ));
 714   fprintf (file, _("\
 715   --no-tls-optimize           Don'\''t try to optimize TLS accesses.\n"
 716                    ));
 717   fprintf (file, _("\
 718   --no-tls-get-addr-optimize  Don'\''t use a special __tls_get_addr call.\n"
 719                    ));
 720   fprintf (file, _("\
 721   --no-opd-optimize           Don'\''t optimize the OPD section.\n"
 722                    ));
 723   fprintf (file, _("\
 724   --no-toc-optimize           Don'\''t optimize the TOC section.\n"
 725                    ));
 726   fprintf (file, _("\
 727   --no-multi-toc              Disallow automatic multiple toc sections.\n"
 728                    ));
 729   fprintf (file, _("\
 730   --no-toc-sort               Don'\''t sort TOC and GOT sections.\n"
 731                    ));
 732   fprintf (file, _("\
 733   --non-overlapping-opd       Canonicalize .opd, so that there are no\n\
 734                                 overlapping .opd entries.\n"
 735                    ));
 736 '
 737
 738 PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}'
 739     case OPTION_STUBGROUP_SIZE:
 740       {
 741         const char *end;
 742         group_size = bfd_scan_vma (optarg, &end, 0);
 743         if (*end)
 744           einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
 745       }
 746       break;
 747
 748     case OPTION_PLT_STATIC_CHAIN:
 749       plt_static_chain = 1;
 750       break;
 751
 752     case OPTION_NO_PLT_STATIC_CHAIN:
 753       plt_static_chain = 0;
 754       break;
 755
 756     case OPTION_STUBSYMS:
 757       emit_stub_syms = 1;
 758       break;
 759
 760     case OPTION_NO_STUBSYMS:
 761       emit_stub_syms = 0;
 762       break;
 763
 764     case OPTION_DOTSYMS:
 765       dotsyms = 1;
 766       break;
 767
 768     case OPTION_NO_DOTSYMS:
 769       dotsyms = 0;
 770       break;
 771
 772     case OPTION_NO_TLS_OPT:
 773       no_tls_opt = 1;
 774       break;
 775
 776     case OPTION_NO_TLS_GET_ADDR_OPT:
 777       no_tls_get_addr_opt = 1;
 778       break;
 779
 780     case OPTION_NO_OPD_OPT:
 781       no_opd_opt = 1;
 782       break;
 783
 784     case OPTION_NO_TOC_OPT:
 785       no_toc_opt = 1;
 786       break;
 787
 788     case OPTION_NO_MULTI_TOC:
 789       no_multi_toc = 1;
 790       break;
 791
 792     case OPTION_NO_TOC_SORT:
 793       no_toc_sort = 1;
 794       break;
 795
 796     case OPTION_NON_OVERLAPPING_OPD:
 797       non_overlapping_opd = 1;
 798       break;
 799 '
 800
 801 # Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation
 802 #
 803 LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
 804 LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
 805 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
 806 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_create_output_section_statements
 807 LDEMUL_NEW_VERS_PATTERN=gld${EMULATION_NAME}_new_vers_pattern