ld/emultempl/ppc64elf.em

   1 # This shell script emits a C file. -*- C -*-
   2 # Copyright (C) 2002-2018 Free Software Foundation, Inc.
   3 #
   4 # This file is part of the GNU Binutils.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19 # MA 02110-1301, USA.
  20 #
  21
  22 # This file is sourced from elf32.em, and defines extra powerpc64-elf
  23 # specific routines.
  24 #
  25 fragment <<EOF
  26
  27 #include "ldctor.h"
  28 #include "elf-bfd.h"
  29 #include "elf64-ppc.h"
  30 #include "ldlex.h"
  31 #include "elf/ppc64.h"
  32
  33 static asection *ppc_add_stub_section (const char *, asection *);
  34 static void ppc_layout_sections_again (void);
  35
  36 static struct ppc64_elf_params params = { NULL,
  37                                           &ppc_add_stub_section,
  38                                           &ppc_layout_sections_again,
  39                                           1, -1, 0,
  40                                           ${DEFAULT_PLT_STATIC_CHAIN-0}, -1, 5,
  41                                           -1, 0, -1, -1, 0};
  42
  43 /* Fake input file for stubs.  */
  44 static lang_input_statement_type *stub_file;
  45
  46 /* Whether we need to call ppc_layout_sections_again.  */
  47 static int need_laying_out = 0;
  48
  49 /* Whether to add ".foo" entries for each "foo" in a version script.  */
  50 static int dotsyms = 1;
  51
  52 /* Whether to run tls optimization.  */
  53 static int no_tls_opt = 0;
  54
  55 /* Whether to run opd optimization.  */
  56 static int no_opd_opt = 0;
  57
  58 /* Whether to convert inline PLT calls to direct.  */
  59 static int no_inline_opt = 0;
  60
  61 /* Whether to run toc optimization.  */
  62 static int no_toc_opt = 0;
  63
  64 /* Whether to sort input toc and got sections.  */
  65 static int no_toc_sort = 0;
  66
  67 /* Input .toc sections will be placed in this output section.  */
  68 static const char *toc_section_name = ".got";
  69 static asection *toc_section = 0;
  70
  71 /* This is called before the input files are opened.  We create a new
  72    fake input file to hold the stub sections.  */
  73
  74 static void
  75 ppc_create_output_section_statements (void)
  76 {
  77   if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
  78         && elf_object_id (link_info.output_bfd) == PPC64_ELF_DATA))
  79     return;
  80
  81   link_info.wrap_char = '.';
  82
  83   stub_file = lang_add_input_file ("linker stubs",
  84                                    lang_input_file_is_fake_enum,
  85                                    NULL);
  86   stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
  87   if (stub_file->the_bfd == NULL
  88       || !bfd_set_arch_mach (stub_file->the_bfd,
  89                              bfd_get_arch (link_info.output_bfd),
  90                              bfd_get_mach (link_info.output_bfd)))
  91     {
  92       einfo (_("%F%P: can not create BFD: %E\n"));
  93       return;
  94     }
  95
  96   stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
  97   ldlang_add_file (stub_file);
  98   params.stub_bfd = stub_file->the_bfd;
  99   if (params.save_restore_funcs < 0)
 100     params.save_restore_funcs = !bfd_link_relocatable (&link_info);
 101   if (!ppc64_elf_init_stub_bfd (&link_info, &params))
 102     einfo (_("%F%P: can not init BFD: %E\n"));
 103 }
 104
 105 /* Called after opening files but before mapping sections.  */
 106
 107 static void
 108 ppc_after_open (void)
 109 {
 110   if (stub_file != NULL && link_info.relro && params.object_in_toc)
 111     {
 112       /* We have a .toc section that might be written to at run time.
 113          Don't put .toc into the .got output section.  */
 114       lang_output_section_statement_type *got;
 115
 116       got = lang_output_section_find (".got");
 117       if (got != NULL)
 118         {
 119           lang_statement_union_type *s;
 120           for (s = got->children.head; s != NULL; s = s->header.next)
 121             if (s->header.type == lang_wild_statement_enum
 122                 && s->wild_statement.filename == NULL)
 123               {
 124                 struct wildcard_list **i = &s->wild_statement.section_list;
 125                 while (*i != NULL)
 126                   if (strcmp ((*i)->spec.name, ".toc") == 0)
 127                     *i = (*i)->next;
 128                   else
 129                     i = &(*i)->next;
 130               }
 131           /* Instead, .toc input sections will be mapped to the
 132              read/write .toc output section.  If user scripts don't
 133              provide one then we'll lose toc sorting and multi-toc.  */
 134           toc_section_name = ".toc";
 135         }
 136     }
 137   gld${EMULATION_NAME}_after_open ();
 138 }
 139
 140 /* Move the input section statement at *U which happens to be on LIST
 141    to be just before *TO.  */
 142
 143 static void
 144 move_input_section (lang_statement_list_type *list,
 145                     lang_statement_union_type **u,
 146                     lang_statement_union_type **to)
 147 {
 148   lang_statement_union_type *s = *u;
 149   asection *i = s->input_section.section;
 150   asection *p, *n;
 151
 152   /* Snip the input section from the statement list.  If it was the
 153      last statement, fix the list tail pointer.  */
 154   *u = s->header.next;
 155   if (*u == NULL)
 156     list->tail = u;
 157   /* Add it back in the new position.  */
 158   s->header.next = *to;
 159   *to = s;
 160   if (list->tail == to)
 161     list->tail = &s->header.next;
 162
 163   /* Trim I off the bfd map_head/map_tail doubly linked lists.  */
 164   n = i->map_head.s;
 165   p = i->map_tail.s;
 166   (p != NULL ? p : i->output_section)->map_head.s = n;
 167   (n != NULL ? n : i->output_section)->map_tail.s = p;
 168
 169   /* Add I back on in its new position.  */
 170   if (s->header.next->header.type == lang_input_section_enum)
 171     {
 172       n = s->header.next->input_section.section;
 173       p = n->map_tail.s;
 174     }
 175   else
 176     {
 177       /* If the next statement is not an input section statement then
 178          TO must point at the previous input section statement
 179          header.next field.  */
 180       lang_input_section_type *prev = (lang_input_section_type *)
 181         ((char *) to - offsetof (lang_statement_union_type, header.next));
 182
 183       ASSERT (prev->header.type == lang_input_section_enum);
 184       p = prev->section;
 185       n = p->map_head.s;
 186     }
 187   i->map_head.s = n;
 188   i->map_tail.s = p;
 189   (p != NULL ? p : i->output_section)->map_head.s = i;
 190   (n != NULL ? n : i->output_section)->map_tail.s = i;
 191 }
 192
 193 /* Sort input section statements in the linker script tree rooted at
 194    LIST so that those whose owning bfd happens to have a section
 195    called .init or .fini are placed first.  Place any TOC sections
 196    referenced by small TOC relocs next, with TOC sections referenced
 197    only by bigtoc relocs last.  */
 198
 199 static void
 200 sort_toc_sections (lang_statement_list_type *list,
 201                    lang_statement_union_type **ini,
 202                    lang_statement_union_type **small)
 203 {
 204   lang_statement_union_type *s, **u;
 205   asection *i;
 206
 207   u = &list->head;
 208   while ((s = *u) != NULL)
 209     {
 210       switch (s->header.type)
 211         {
 212         case lang_wild_statement_enum:
 213           sort_toc_sections (&s->wild_statement.children, ini, small);
 214           break;
 215
 216         case lang_group_statement_enum:
 217           sort_toc_sections (&s->group_statement.children, ini, small);
 218           break;
 219
 220         case lang_input_section_enum:
 221           i = s->input_section.section;
 222           /* Leave the stub_file .got where it is.  We put the .got
 223              header there.  */
 224           if (i->owner == stub_file->the_bfd)
 225             break;
 226           if (bfd_get_section_by_name (i->owner, ".init") != NULL
 227               || bfd_get_section_by_name (i->owner, ".fini") != NULL)
 228             {
 229               if (ini != NULL && *ini != s)
 230                 {
 231                   move_input_section (list, u, ini);
 232                   if (small == ini)
 233                     small = &s->header.next;
 234                   ini = &s->header.next;
 235                   continue;
 236                 }
 237               if (small == ini)
 238                 small = &s->header.next;
 239               ini = &s->header.next;
 240               break;
 241             }
 242           else if (ini == NULL)
 243             ini = u;
 244
 245           if (ppc64_elf_has_small_toc_reloc (i))
 246             {
 247               if (small != NULL && *small != s)
 248                 {
 249                   move_input_section (list, u, small);
 250                   small = &s->header.next;
 251                   continue;
 252                 }
 253               small = &s->header.next;
 254             }
 255           else if (small == NULL)
 256             small = u;
 257           break;
 258
 259         default:
 260           break;
 261         }
 262       u = &s->header.next;
 263     }
 264 }
 265
 266 static void
 267 prelim_size_sections (void)
 268 {
 269   if (expld.phase != lang_mark_phase_enum)
 270     {
 271       expld.phase = lang_mark_phase_enum;
 272       expld.dataseg.phase = exp_seg_none;
 273       one_lang_size_sections_pass (NULL, FALSE);
 274       /* We must not cache anything from the preliminary sizing.  */
 275       lang_reset_memory_regions ();
 276     }
 277 }
 278
 279 static void
 280 ppc_before_allocation (void)
 281 {
 282   if (stub_file != NULL)
 283     {
 284       if (!no_opd_opt
 285           && !ppc64_elf_edit_opd (&link_info))
 286         einfo (_("%X%P: can not edit %s: %E\n"), "opd");
 287
 288       if (!no_inline_opt
 289           && !bfd_link_relocatable (&link_info))
 290         {
 291           prelim_size_sections ();
 292
 293           if (!ppc64_elf_inline_plt (&link_info))
 294             einfo (_("%X%P: inline PLT: %E\n"));
 295         }
 296
 297       if (ppc64_elf_tls_setup (&link_info)
 298           && !no_tls_opt)
 299         {
 300           /* Size the sections.  This is premature, but we want to know the
 301              TLS segment layout so that certain optimizations can be done.  */
 302           prelim_size_sections ();
 303
 304           if (!ppc64_elf_tls_optimize (&link_info))
 305             einfo (_("%X%P: TLS problem %E\n"));
 306         }
 307
 308       if (!no_toc_opt
 309           && !bfd_link_relocatable (&link_info))
 310         {
 311           prelim_size_sections ();
 312
 313           if (!ppc64_elf_edit_toc (&link_info))
 314             einfo (_("%X%P: can not edit %s: %E\n"), "toc");
 315         }
 316
 317       if (!no_toc_sort)
 318         {
 319           lang_output_section_statement_type *toc_os;
 320
 321           toc_os = lang_output_section_find (toc_section_name);
 322           if (toc_os != NULL)
 323             sort_toc_sections (&toc_os->children, NULL, NULL);
 324         }
 325     }
 326
 327   gld${EMULATION_NAME}_before_allocation ();
 328 }
 329
 330 struct hook_stub_info
 331 {
 332   lang_statement_list_type add;
 333   asection *input_section;
 334 };
 335
 336 /* Traverse the linker tree to find the spot where the stub goes.  */
 337
 338 static bfd_boolean
 339 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
 340 {
 341   lang_statement_union_type *l;
 342   bfd_boolean ret;
 343
 344   for (; (l = *lp) != NULL; lp = &l->header.next)
 345     {
 346       switch (l->header.type)
 347         {
 348         case lang_constructors_statement_enum:
 349           ret = hook_in_stub (info, &constructor_list.head);
 350           if (ret)
 351             return ret;
 352           break;
 353
 354         case lang_output_section_statement_enum:
 355           ret = hook_in_stub (info,
 356                               &l->output_section_statement.children.head);
 357           if (ret)
 358             return ret;
 359           break;
 360
 361         case lang_wild_statement_enum:
 362           ret = hook_in_stub (info, &l->wild_statement.children.head);
 363           if (ret)
 364             return ret;
 365           break;
 366
 367         case lang_group_statement_enum:
 368           ret = hook_in_stub (info, &l->group_statement.children.head);
 369           if (ret)
 370             return ret;
 371           break;
 372
 373         case lang_input_section_enum:
 374           if (l->input_section.section == info->input_section)
 375             {
 376               /* We've found our section.  Insert the stub immediately
 377                  before its associated input section.  */
 378               *lp = info->add.head;
 379               *(info->add.tail) = l;
 380               return TRUE;
 381             }
 382           break;
 383
 384         case lang_data_statement_enum:
 385         case lang_reloc_statement_enum:
 386         case lang_object_symbols_statement_enum:
 387         case lang_output_statement_enum:
 388         case lang_target_statement_enum:
 389         case lang_input_statement_enum:
 390         case lang_assignment_statement_enum:
 391         case lang_padding_statement_enum:
 392         case lang_address_statement_enum:
 393         case lang_fill_statement_enum:
 394           break;
 395
 396         default:
 397           FAIL ();
 398           break;
 399         }
 400     }
 401   return FALSE;
 402 }
 403
 404
 405 /* Call-back for ppc64_elf_size_stubs.  */
 406
 407 /* Create a new stub section, and arrange for it to be linked
 408    immediately before INPUT_SECTION.  */
 409
 410 static asection *
 411 ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
 412 {
 413   asection *stub_sec;
 414   flagword flags;
 415   asection *output_section;
 416   lang_output_section_statement_type *os;
 417   struct hook_stub_info info;
 418
 419   flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
 420            | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP);
 421   stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
 422                                                  stub_sec_name, flags);
 423   if (stub_sec == NULL
 424       || !bfd_set_section_alignment (stub_file->the_bfd, stub_sec,
 425                                      (params.plt_stub_align > 5
 426                                       ? params.plt_stub_align
 427                                       : params.plt_stub_align < -5
 428                                       ? -params.plt_stub_align
 429                                       : 5)))
 430     goto err_ret;
 431
 432   output_section = input_section->output_section;
 433   os = lang_output_section_get (output_section);
 434
 435   info.input_section = input_section;
 436   lang_list_init (&info.add);
 437   lang_add_section (&info.add, stub_sec, NULL, os);
 438
 439   if (info.add.head == NULL)
 440     goto err_ret;
 441
 442   if (hook_in_stub (&info, &os->children.head))
 443     return stub_sec;
 444
 445  err_ret:
 446   einfo (_("%X%P: can not make stub section: %E\n"));
 447   return NULL;
 448 }
 449
 450
 451 /* Another call-back for ppc64_elf_size_stubs.  */
 452
 453 static void
 454 ppc_layout_sections_again (void)
 455 {
 456   /* If we have changed sizes of the stub sections, then we need
 457      to recalculate all the section offsets.  This may mean we need to
 458      add even more stubs.  */
 459   gld${EMULATION_NAME}_map_segments (TRUE);
 460
 461   if (!bfd_link_relocatable (&link_info))
 462     ppc64_elf_set_toc (&link_info, link_info.output_bfd);
 463
 464   need_laying_out = -1;
 465 }
 466
 467
 468 static void
 469 build_toc_list (lang_statement_union_type *statement)
 470 {
 471   if (statement->header.type == lang_input_section_enum)
 472     {
 473       asection *i = statement->input_section.section;
 474
 475       if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
 476           && (i->flags & SEC_EXCLUDE) == 0
 477           && i->output_section == toc_section)
 478         {
 479           if (!ppc64_elf_next_toc_section (&link_info, i))
 480             einfo (_("%X%P: linker script separates .got and .toc\n"));
 481         }
 482     }
 483 }
 484
 485
 486 static void
 487 build_section_lists (lang_statement_union_type *statement)
 488 {
 489   if (statement->header.type == lang_input_section_enum)
 490     {
 491       asection *i = statement->input_section.section;
 492
 493       if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms
 494           && (i->flags & SEC_EXCLUDE) == 0
 495           && i->output_section != NULL
 496           && i->output_section->owner == link_info.output_bfd)
 497         {
 498           if (!ppc64_elf_next_input_section (&link_info, i))
 499             einfo (_("%X%P: can not size stub section: %E\n"));
 500         }
 501     }
 502 }
 503
 504
 505 /* Call the back-end function to set TOC base after we have placed all
 506    the sections.  */
 507 static void
 508 gld${EMULATION_NAME}_after_allocation (void)
 509 {
 510   int ret;
 511
 512   /* If generating a relocatable output file, then we don't have any
 513      stubs.  */
 514   if (stub_file != NULL && !bfd_link_relocatable (&link_info))
 515     {
 516       ret = ppc64_elf_setup_section_lists (&link_info);
 517       if (ret < 0)
 518         einfo (_("%X%P: can not size stub section: %E\n"));
 519       else
 520         {
 521           ppc64_elf_start_multitoc_partition (&link_info);
 522
 523           if (!params.no_multi_toc)
 524             {
 525               toc_section = bfd_get_section_by_name (link_info.output_bfd,
 526                                                      toc_section_name);
 527               if (toc_section != NULL)
 528                 lang_for_each_statement (build_toc_list);
 529             }
 530
 531           if (ppc64_elf_layout_multitoc (&link_info)
 532               && !params.no_multi_toc
 533               && toc_section != NULL)
 534             lang_for_each_statement (build_toc_list);
 535
 536           ppc64_elf_finish_multitoc_partition (&link_info);
 537
 538           lang_for_each_statement (build_section_lists);
 539
 540           if (!ppc64_elf_check_init_fini (&link_info))
 541             einfo (_("%P: .init/.fini fragments use differing TOC pointers\n"));
 542
 543           /* Call into the BFD backend to do the real work.  */
 544           if (!ppc64_elf_size_stubs (&link_info))
 545             einfo (_("%X%P: can not size stub section: %E\n"));
 546         }
 547     }
 548
 549   /* We can't parse and merge .eh_frame until the glink .eh_frame has
 550      been generated.  Otherwise the glink .eh_frame CIE won't be
 551      merged with other CIEs, and worse, the glink .eh_frame FDEs won't
 552      be listed in .eh_frame_hdr.  */
 553   ret = bfd_elf_discard_info (link_info.output_bfd, &link_info);
 554   if (ret < 0)
 555     {
 556       einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
 557       return;
 558     }
 559   else if (ret > 0)
 560     need_laying_out = 1;
 561
 562   /* Call map_segments regardless of the state of need_laying_out.
 563      need_laying_out set to -1 means we have just laid everything out,
 564      but ppc64_elf_size_stubs strips .branch_lt and .eh_frame if
 565      unneeded, after ppc_layout_sections_again.  Another call removes
 566      these sections from the segment map.  Their presence is
 567      innocuous except for confusing ELF_SECTION_IN_SEGMENT.  */
 568   gld${EMULATION_NAME}_map_segments (need_laying_out > 0);
 569
 570   if (need_laying_out != -1 && !bfd_link_relocatable (&link_info))
 571     ppc64_elf_set_toc (&link_info, link_info.output_bfd);
 572 }
 573
 574
 575 /* Final emulation specific call.  */
 576
 577 static void
 578 gld${EMULATION_NAME}_finish (void)
 579 {
 580   char *msg = NULL;
 581   char *line, *endline;
 582
 583   /* e_entry on PowerPC64 points to the function descriptor for
 584      _start.  If _start is missing, default to the first function
 585      descriptor in the .opd section.  */
 586   if (stub_file != NULL
 587       && (elf_elfheader (link_info.output_bfd)->e_flags & EF_PPC64_ABI) == 1)
 588     entry_section = ".opd";
 589
 590   if (params.emit_stub_syms < 0)
 591     params.emit_stub_syms = 1;
 592   if (stub_file != NULL
 593       && !bfd_link_relocatable (&link_info)
 594       && !ppc64_elf_build_stubs (&link_info, config.stats ? &msg : NULL))
 595     einfo (_("%X%P: can not build stubs: %E\n"));
 596
 597   fflush (stdout);
 598   for (line = msg; line != NULL; line = endline)
 599     {
 600       endline = strchr (line, '\n');
 601       if (endline != NULL)
 602         *endline++ = '\0';
 603       fprintf (stderr, "%s: %s\n", program_name, line);
 604     }
 605   fflush (stderr);
 606   if (msg != NULL)
 607     free (msg);
 608
 609   finish_default ();
 610 }
 611
 612
 613 /* Add a pattern matching ".foo" for every "foo" in a version script.
 614
 615    The reason for doing this is that many shared library version
 616    scripts export a selected set of functions or data symbols, forcing
 617    others local.  eg.
 618
 619    . VERS_1 {
 620    .       global:
 621    .               this; that; some; thing;
 622    .       local:
 623    .               *;
 624    .   };
 625
 626    To make the above work for PowerPC64, we need to export ".this",
 627    ".that" and so on, otherwise only the function descriptor syms are
 628    exported.  Lack of an exported function code sym may cause a
 629    definition to be pulled in from a static library.  */
 630
 631 static struct bfd_elf_version_expr *
 632 gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry)
 633 {
 634   struct bfd_elf_version_expr *dot_entry;
 635   unsigned int len;
 636   char *dot_pat;
 637
 638   if (!dotsyms
 639       || entry->pattern[0] == '.'
 640       || (!entry->literal && entry->pattern[0] == '*'))
 641     return entry;
 642
 643   dot_entry = xmalloc (sizeof *dot_entry);
 644   *dot_entry = *entry;
 645   dot_entry->next = entry;
 646   len = strlen (entry->pattern) + 2;
 647   dot_pat = xmalloc (len);
 648   dot_pat[0] = '.';
 649   memcpy (dot_pat + 1, entry->pattern, len - 1);
 650   dot_entry->pattern = dot_pat;
 651   dot_entry->script = 1;
 652   return dot_entry;
 653 }
 654
 655
 656 /* Avoid processing the fake stub_file in vercheck, stat_needed and
 657    check_needed routines.  */
 658
 659 static void (*real_func) (lang_input_statement_type *);
 660
 661 static void ppc_for_each_input_file_wrapper (lang_input_statement_type *l)
 662 {
 663   if (l != stub_file)
 664     (*real_func) (l);
 665 }
 666
 667 static void
 668 ppc_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
 669 {
 670   real_func = func;
 671   lang_for_each_input_file (&ppc_for_each_input_file_wrapper);
 672 }
 673
 674 #define lang_for_each_input_file ppc_lang_for_each_input_file
 675
 676 EOF
 677
 678 if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then
 679   fragment <<EOF
 680 /* Special handling for embedded SPU executables.  */
 681 extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);
 682 static bfd_boolean gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *);
 683
 684 static bfd_boolean
 685 ppc64_recognized_file (lang_input_statement_type *entry)
 686 {
 687   if (embedded_spu_file (entry, "-m64"))
 688     return TRUE;
 689
 690   return gld${EMULATION_NAME}_load_symbols (entry);
 691 }
 692 EOF
 693 LDEMUL_RECOGNIZED_FILE=ppc64_recognized_file
 694 fi
 695
 696 # Define some shell vars to insert bits of code into the standard elf
 697 # parse_args and list_options functions.
 698 #
 699 PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}'
 700 enum ppc64_opt
 701 {
 702   OPTION_STUBGROUP_SIZE = 321,
 703   OPTION_PLT_STATIC_CHAIN,
 704   OPTION_NO_PLT_STATIC_CHAIN,
 705   OPTION_PLT_THREAD_SAFE,
 706   OPTION_NO_PLT_THREAD_SAFE,
 707   OPTION_PLT_ALIGN,
 708   OPTION_NO_PLT_ALIGN,
 709   OPTION_PLT_LOCALENTRY,
 710   OPTION_NO_PLT_LOCALENTRY,
 711   OPTION_STUBSYMS,
 712   OPTION_NO_STUBSYMS,
 713   OPTION_SAVRES,
 714   OPTION_NO_SAVRES,
 715   OPTION_DOTSYMS,
 716   OPTION_NO_DOTSYMS,
 717   OPTION_NO_TLS_OPT,
 718   OPTION_TLS_GET_ADDR_OPT,
 719   OPTION_NO_TLS_GET_ADDR_OPT,
 720   OPTION_NO_OPD_OPT,
 721   OPTION_NO_INLINE_OPT,
 722   OPTION_NO_TOC_OPT,
 723   OPTION_NO_MULTI_TOC,
 724   OPTION_NO_TOC_SORT,
 725   OPTION_NON_OVERLAPPING_OPD
 726 };
 727 '
 728
 729 PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}'
 730   { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
 731   { "plt-static-chain", no_argument, NULL, OPTION_PLT_STATIC_CHAIN },
 732   { "no-plt-static-chain", no_argument, NULL, OPTION_NO_PLT_STATIC_CHAIN },
 733   { "plt-thread-safe", no_argument, NULL, OPTION_PLT_THREAD_SAFE },
 734   { "no-plt-thread-safe", no_argument, NULL, OPTION_NO_PLT_THREAD_SAFE },
 735   { "plt-align", optional_argument, NULL, OPTION_PLT_ALIGN },
 736   { "no-plt-align", no_argument, NULL, OPTION_NO_PLT_ALIGN },
 737   { "plt-localentry", optional_argument, NULL, OPTION_PLT_LOCALENTRY },
 738   { "no-plt-localentry", no_argument, NULL, OPTION_NO_PLT_LOCALENTRY },
 739   { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
 740   { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS },
 741   { "dotsyms", no_argument, NULL, OPTION_DOTSYMS },
 742   { "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS },
 743   { "save-restore-funcs", no_argument, NULL, OPTION_SAVRES },
 744   { "no-save-restore-funcs", no_argument, NULL, OPTION_NO_SAVRES },
 745   { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
 746   { "tls-get-addr-optimize", no_argument, NULL, OPTION_TLS_GET_ADDR_OPT },
 747   { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT },
 748   { "no-opd-optimize", no_argument, NULL, OPTION_NO_OPD_OPT },
 749   { "no-inline-optimize", no_argument, NULL, OPTION_NO_INLINE_OPT },
 750   { "no-toc-optimize", no_argument, NULL, OPTION_NO_TOC_OPT },
 751   { "no-multi-toc", no_argument, NULL, OPTION_NO_MULTI_TOC },
 752   { "no-toc-sort", no_argument, NULL, OPTION_NO_TOC_SORT },
 753   { "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD },
 754 '
 755
 756 PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}'
 757   fprintf (file, _("\
 758   --stub-group-size=N         Maximum size of a group of input sections that\n\
 759                                 can be handled by one stub section.  A negative\n\
 760                                 value locates all stubs before their branches\n\
 761                                 (with a group size of -N), while a positive\n\
 762                                 value allows two groups of input sections, one\n\
 763                                 before, and one after each stub section.\n\
 764                                 Values of +/-1 indicate the linker should\n\
 765                                 choose suitable defaults.\n"
 766                    ));
 767   fprintf (file, _("\
 768   --plt-static-chain          PLT call stubs should load r11'${DEFAULT_PLT_STATIC_CHAIN- (default)}'\n"
 769                    ));
 770   fprintf (file, _("\
 771   --no-plt-static-chain       PLT call stubs should not load r11'${DEFAULT_PLT_STATIC_CHAIN+ (default)}'\n"
 772                    ));
 773   fprintf (file, _("\
 774   --plt-thread-safe           PLT call stubs with load-load barrier\n"
 775                    ));
 776   fprintf (file, _("\
 777   --no-plt-thread-safe        PLT call stubs without barrier\n"
 778                    ));
 779   fprintf (file, _("\
 780   --plt-align [=<align>]      Align PLT call stubs to fit cache lines\n"
 781                    ));
 782   fprintf (file, _("\
 783   --no-plt-align              Dont'\''t align individual PLT call stubs\n"
 784                    ));
 785   fprintf (file, _("\
 786   --plt-localentry            Optimize calls to ELFv2 localentry:0 functions\n"
 787                    ));
 788   fprintf (file, _("\
 789   --no-plt-localentry         Don'\''t optimize ELFv2 calls\n"
 790                    ));
 791   fprintf (file, _("\
 792   --emit-stub-syms            Label linker stubs with a symbol\n"
 793                    ));
 794   fprintf (file, _("\
 795   --no-emit-stub-syms         Don'\''t label linker stubs with a symbol\n"
 796                    ));
 797   fprintf (file, _("\
 798   --dotsyms                   For every version pattern \"foo\" in a version\n\
 799                                 script, add \".foo\" so that function code\n\
 800                                 symbols are treated the same as function\n\
 801                                 descriptor symbols.  Defaults to on.\n"
 802                    ));
 803   fprintf (file, _("\
 804   --no-dotsyms                Don'\''t do anything special in version scripts\n"
 805                    ));
 806   fprintf (file, _("\
 807   --save-restore-funcs        Provide register save and restore routines used\n\
 808                                 by gcc -Os code.  Defaults to on for normal\n\
 809                                 final link, off for ld -r.\n"
 810                    ));
 811   fprintf (file, _("\
 812   --no-save-restore-funcs     Don'\''t provide these routines\n"
 813                    ));
 814   fprintf (file, _("\
 815   --no-tls-optimize           Don'\''t try to optimize TLS accesses\n"
 816                    ));
 817   fprintf (file, _("\
 818   --tls-get-addr-optimize     Force use of special __tls_get_addr call\n"
 819                    ));
 820   fprintf (file, _("\
 821   --no-tls-get-addr-optimize  Don'\''t use a special __tls_get_addr call\n"
 822                    ));
 823   fprintf (file, _("\
 824   --no-opd-optimize           Don'\''t optimize the OPD section\n"
 825                    ));
 826   fprintf (file, _("\
 827   --no-inline-optimize        Don'\''t convert inline PLT to direct calls\n"
 828                    ));
 829   fprintf (file, _("\
 830   --no-toc-optimize           Don'\''t optimize the TOC section\n"
 831                    ));
 832   fprintf (file, _("\
 833   --no-multi-toc              Disallow automatic multiple toc sections\n"
 834                    ));
 835   fprintf (file, _("\
 836   --no-toc-sort               Don'\''t sort TOC and GOT sections\n"
 837                    ));
 838   fprintf (file, _("\
 839   --non-overlapping-opd       Canonicalize .opd, so that there are no\n\
 840                                 overlapping .opd entries\n"
 841                    ));
 842 '
 843
 844 PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}'
 845     case OPTION_STUBGROUP_SIZE:
 846       {
 847         const char *end;
 848         params.group_size = bfd_scan_vma (optarg, &end, 0);
 849         if (*end)
 850           einfo (_("%F%P: invalid number `%s'\''\n"), optarg);
 851       }
 852       break;
 853
 854     case OPTION_PLT_STATIC_CHAIN:
 855       params.plt_static_chain = 1;
 856       break;
 857
 858     case OPTION_NO_PLT_STATIC_CHAIN:
 859       params.plt_static_chain = 0;
 860       break;
 861
 862     case OPTION_PLT_THREAD_SAFE:
 863       params.plt_thread_safe = 1;
 864       break;
 865
 866     case OPTION_NO_PLT_THREAD_SAFE:
 867       params.plt_thread_safe = 0;
 868       break;
 869
 870     case OPTION_PLT_ALIGN:
 871       if (optarg != NULL)
 872         {
 873           char *end;
 874           long val = strtol (optarg, &end, 0);
 875           if (*end || (unsigned long) val + 8 > 16)
 876             einfo (_("%F%P: invalid --plt-align `%s'\''\n"), optarg);
 877           params.plt_stub_align = val;
 878         }
 879       else
 880         params.plt_stub_align = 5;
 881       break;
 882
 883     case OPTION_NO_PLT_ALIGN:
 884       params.plt_stub_align = 0;
 885       break;
 886
 887     case OPTION_PLT_LOCALENTRY:
 888       params.plt_localentry0 = 1;
 889       break;
 890
 891     case OPTION_NO_PLT_LOCALENTRY:
 892       params.plt_localentry0 = 0;
 893       break;
 894
 895     case OPTION_STUBSYMS:
 896       params.emit_stub_syms = 1;
 897       break;
 898
 899     case OPTION_NO_STUBSYMS:
 900       params.emit_stub_syms = 0;
 901       break;
 902
 903     case OPTION_DOTSYMS:
 904       dotsyms = 1;
 905       break;
 906
 907     case OPTION_NO_DOTSYMS:
 908       dotsyms = 0;
 909       break;
 910
 911     case OPTION_SAVRES:
 912       params.save_restore_funcs = 1;
 913       break;
 914
 915     case OPTION_NO_SAVRES:
 916       params.save_restore_funcs = 0;
 917       break;
 918
 919     case OPTION_NO_TLS_OPT:
 920       no_tls_opt = 1;
 921       break;
 922
 923     case OPTION_TLS_GET_ADDR_OPT:
 924       params.tls_get_addr_opt = 1;
 925       break;
 926
 927     case OPTION_NO_TLS_GET_ADDR_OPT:
 928       params.tls_get_addr_opt = 0;
 929       break;
 930
 931     case OPTION_NO_OPD_OPT:
 932       no_opd_opt = 1;
 933       break;
 934
 935     case OPTION_NO_INLINE_OPT:
 936       no_inline_opt = 1;
 937       break;
 938
 939     case OPTION_NO_TOC_OPT:
 940       no_toc_opt = 1;
 941       break;
 942
 943     case OPTION_NO_MULTI_TOC:
 944       params.no_multi_toc = 1;
 945       break;
 946
 947     case OPTION_NO_TOC_SORT:
 948       no_toc_sort = 1;
 949       break;
 950
 951     case OPTION_NON_OVERLAPPING_OPD:
 952       params.non_overlapping_opd = 1;
 953       break;
 954
 955     case OPTION_TRADITIONAL_FORMAT:
 956       no_tls_opt = 1;
 957       params.tls_get_addr_opt = 0;
 958       no_opd_opt = 1;
 959       no_toc_opt = 1;
 960       params.no_multi_toc = 1;
 961       no_toc_sort = 1;
 962       params.plt_static_chain = 1;
 963       return FALSE;
 964 '
 965
 966 # Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation
 967 #
 968 LDEMUL_NEW_VERS_PATTERN=gld${EMULATION_NAME}_new_vers_pattern
 969 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_create_output_section_statements
 970 LDEMUL_AFTER_OPEN=ppc_after_open
 971 LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
 972 LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
 973 LDEMUL_FINISH=gld${EMULATION_NAME}_finish