bfd/elf64-sparc.c

   1 /* SPARC-specific support for 64-bit ELF
   2    Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   3    2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   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 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25 #include "elf-bfd.h"
  26 #include "elf/sparc.h"
  27 #include "opcode/sparc.h"
  28 #include "elfxx-sparc.h"
  29
  30 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value.  */
  31 #define MINUS_ONE (~ (bfd_vma) 0)
  32
  33 /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA
  34    section can represent up to two relocs, we must tell the user to allocate
  35    more space.  */
  36
  37 static long
  38 elf64_sparc_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
  39 {
  40   return (sec->reloc_count * 2 + 1) * sizeof (arelent *);
  41 }
  42
  43 static long
  44 elf64_sparc_get_dynamic_reloc_upper_bound (bfd *abfd)
  45 {
  46   return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2;
  47 }
  48
  49 /* Read  relocations for ASECT from REL_HDR.  There are RELOC_COUNT of
  50    them.  We cannot use generic elf routines for this,  because R_SPARC_OLO10
  51    has secondary addend in ELF64_R_TYPE_DATA.  We handle it as two relocations
  52    for the same location,  R_SPARC_LO10 and R_SPARC_13.  */
  53
  54 static bfd_boolean
  55 elf64_sparc_slurp_one_reloc_table (bfd *abfd, asection *asect,
  56                                    Elf_Internal_Shdr *rel_hdr,
  57                                    asymbol **symbols, bfd_boolean dynamic)
  58 {
  59   PTR allocated = NULL;
  60   bfd_byte *native_relocs;
  61   arelent *relent;
  62   unsigned int i;
  63   int entsize;
  64   bfd_size_type count;
  65   arelent *relents;
  66
  67   allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
  68   if (allocated == NULL)
  69     goto error_return;
  70
  71   if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
  72       || bfd_bread (allocated, rel_hdr->sh_size, abfd) != rel_hdr->sh_size)
  73     goto error_return;
  74
  75   native_relocs = (bfd_byte *) allocated;
  76
  77   relents = asect->relocation + canon_reloc_count (asect);
  78
  79   entsize = rel_hdr->sh_entsize;
  80   BFD_ASSERT (entsize == sizeof (Elf64_External_Rela));
  81
  82   count = rel_hdr->sh_size / entsize;
  83
  84   for (i = 0, relent = relents; i < count;
  85        i++, relent++, native_relocs += entsize)
  86     {
  87       Elf_Internal_Rela rela;
  88       unsigned int r_type;
  89
  90       bfd_elf64_swap_reloca_in (abfd, native_relocs, &rela);
  91
  92       /* The address of an ELF reloc is section relative for an object
  93          file, and absolute for an executable file or shared library.
  94          The address of a normal BFD reloc is always section relative,
  95          and the address of a dynamic reloc is absolute..  */
  96       if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
  97         relent->address = rela.r_offset;
  98       else
  99         relent->address = rela.r_offset - asect->vma;
 100
 101       if (ELF64_R_SYM (rela.r_info) == STN_UNDEF)
 102         relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 103       else
 104         {
 105           asymbol **ps, *s;
 106
 107           ps = symbols + ELF64_R_SYM (rela.r_info) - 1;
 108           s = *ps;
 109
 110           /* Canonicalize ELF section symbols.  FIXME: Why?  */
 111           if ((s->flags & BSF_SECTION_SYM) == 0)
 112             relent->sym_ptr_ptr = ps;
 113           else
 114             relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
 115         }
 116
 117       relent->addend = rela.r_addend;
 118
 119       r_type = ELF64_R_TYPE_ID (rela.r_info);
 120       if (r_type == R_SPARC_OLO10)
 121         {
 122           relent->howto = _bfd_sparc_elf_info_to_howto_ptr (R_SPARC_LO10);
 123           relent[1].address = relent->address;
 124           relent++;
 125           relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
 126           relent->addend = ELF64_R_TYPE_DATA (rela.r_info);
 127           relent->howto = _bfd_sparc_elf_info_to_howto_ptr (R_SPARC_13);
 128         }
 129       else
 130         relent->howto = _bfd_sparc_elf_info_to_howto_ptr (r_type);
 131     }
 132
 133   canon_reloc_count (asect) += relent - relents;
 134
 135   if (allocated != NULL)
 136     free (allocated);
 137
 138   return TRUE;
 139
 140  error_return:
 141   if (allocated != NULL)
 142     free (allocated);
 143   return FALSE;
 144 }
 145
 146 /* Read in and swap the external relocs.  */
 147
 148 static bfd_boolean
 149 elf64_sparc_slurp_reloc_table (bfd *abfd, asection *asect,
 150                                asymbol **symbols, bfd_boolean dynamic)
 151 {
 152   struct bfd_elf_section_data * const d = elf_section_data (asect);
 153   Elf_Internal_Shdr *rel_hdr;
 154   Elf_Internal_Shdr *rel_hdr2;
 155   bfd_size_type amt;
 156
 157   if (asect->relocation != NULL)
 158     return TRUE;
 159
 160   if (! dynamic)
 161     {
 162       if ((asect->flags & SEC_RELOC) == 0
 163           || asect->reloc_count == 0)
 164         return TRUE;
 165
 166       rel_hdr = d->rel.hdr;
 167       rel_hdr2 = d->rela.hdr;
 168
 169       BFD_ASSERT ((rel_hdr && asect->rel_filepos == rel_hdr->sh_offset)
 170                   || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
 171     }
 172   else
 173     {
 174       /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
 175          case because relocations against this section may use the
 176          dynamic symbol table, and in that case bfd_section_from_shdr
 177          in elf.c does not update the RELOC_COUNT.  */
 178       if (asect->size == 0)
 179         return TRUE;
 180
 181       rel_hdr = &d->this_hdr;
 182       asect->reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
 183       rel_hdr2 = NULL;
 184     }
 185
 186   amt = asect->reloc_count;
 187   amt *= 2 * sizeof (arelent);
 188   asect->relocation = (arelent *) bfd_alloc (abfd, amt);
 189   if (asect->relocation == NULL)
 190     return FALSE;
 191
 192   /* The elf64_sparc_slurp_one_reloc_table routine increments
 193      canon_reloc_count.  */
 194   canon_reloc_count (asect) = 0;
 195
 196   if (rel_hdr
 197       && !elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols,
 198                                              dynamic))
 199     return FALSE;
 200
 201   if (rel_hdr2
 202       && !elf64_sparc_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols,
 203                                              dynamic))
 204     return FALSE;
 205
 206   return TRUE;
 207 }
 208
 209 /* Canonicalize the relocs.  */
 210
 211 static long
 212 elf64_sparc_canonicalize_reloc (bfd *abfd, sec_ptr section,
 213                                 arelent **relptr, asymbol **symbols)
 214 {
 215   arelent *tblptr;
 216   unsigned int i;
 217   const struct elf_backend_data *bed = get_elf_backend_data (abfd);
 218
 219   if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
 220     return -1;
 221
 222   tblptr = section->relocation;
 223   for (i = 0; i < canon_reloc_count (section); i++)
 224     *relptr++ = tblptr++;
 225
 226   *relptr = NULL;
 227
 228   return canon_reloc_count (section);
 229 }
 230
 231
 232 /* Canonicalize the dynamic relocation entries.  Note that we return
 233    the dynamic relocations as a single block, although they are
 234    actually associated with particular sections; the interface, which
 235    was designed for SunOS style shared libraries, expects that there
 236    is only one set of dynamic relocs.  Any section that was actually
 237    installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
 238    the dynamic symbol table, is considered to be a dynamic reloc
 239    section.  */
 240
 241 static long
 242 elf64_sparc_canonicalize_dynamic_reloc (bfd *abfd, arelent **storage,
 243                                         asymbol **syms)
 244 {
 245   asection *s;
 246   long ret;
 247
 248   if (elf_dynsymtab (abfd) == 0)
 249     {
 250       bfd_set_error (bfd_error_invalid_operation);
 251       return -1;
 252     }
 253
 254   ret = 0;
 255   for (s = abfd->sections; s != NULL; s = s->next)
 256     {
 257       if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
 258           && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
 259         {
 260           arelent *p;
 261           long count, i;
 262
 263           if (! elf64_sparc_slurp_reloc_table (abfd, s, syms, TRUE))
 264             return -1;
 265           count = canon_reloc_count (s);
 266           p = s->relocation;
 267           for (i = 0; i < count; i++)
 268             *storage++ = p++;
 269           ret += count;
 270         }
 271     }
 272
 273   *storage = NULL;
 274
 275   return ret;
 276 }
 277
 278 /* Write out the relocs.  */
 279
 280 static void
 281 elf64_sparc_write_relocs (bfd *abfd, asection *sec, PTR data)
 282 {
 283   bfd_boolean *failedp = (bfd_boolean *) data;
 284   Elf_Internal_Shdr *rela_hdr;
 285   bfd_vma addr_offset;
 286   Elf64_External_Rela *outbound_relocas, *src_rela;
 287   unsigned int idx, count;
 288   asymbol *last_sym = 0;
 289   int last_sym_idx = 0;
 290
 291   /* If we have already failed, don't do anything.  */
 292   if (*failedp)
 293     return;
 294
 295   if ((sec->flags & SEC_RELOC) == 0)
 296     return;
 297
 298   /* The linker backend writes the relocs out itself, and sets the
 299      reloc_count field to zero to inhibit writing them here.  Also,
 300      sometimes the SEC_RELOC flag gets set even when there aren't any
 301      relocs.  */
 302   if (sec->reloc_count == 0)
 303     return;
 304
 305   /* We can combine two relocs that refer to the same address
 306      into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the
 307      latter is R_SPARC_13 with no associated symbol.  */
 308   count = 0;
 309   for (idx = 0; idx < sec->reloc_count; idx++)
 310     {
 311       bfd_vma addr;
 312
 313       ++count;
 314
 315       addr = sec->orelocation[idx]->address;
 316       if (sec->orelocation[idx]->howto->type == R_SPARC_LO10
 317           && idx < sec->reloc_count - 1)
 318         {
 319           arelent *r = sec->orelocation[idx + 1];
 320
 321           if (r->howto->type == R_SPARC_13
 322               && r->address == addr
 323               && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
 324               && (*r->sym_ptr_ptr)->value == 0)
 325             ++idx;
 326         }
 327     }
 328
 329   rela_hdr = elf_section_data (sec)->rela.hdr;
 330
 331   rela_hdr->sh_size = rela_hdr->sh_entsize * count;
 332   rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
 333   if (rela_hdr->contents == NULL)
 334     {
 335       *failedp = TRUE;
 336       return;
 337     }
 338
 339   /* Figure out whether the relocations are RELA or REL relocations.  */
 340   if (rela_hdr->sh_type != SHT_RELA)
 341     abort ();
 342
 343   /* The address of an ELF reloc is section relative for an object
 344      file, and absolute for an executable file or shared library.
 345      The address of a BFD reloc is always section relative.  */
 346   addr_offset = 0;
 347   if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
 348     addr_offset = sec->vma;
 349
 350   /* orelocation has the data, reloc_count has the count...  */
 351   outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents;
 352   src_rela = outbound_relocas;
 353
 354   for (idx = 0; idx < sec->reloc_count; idx++)
 355     {
 356       Elf_Internal_Rela dst_rela;
 357       arelent *ptr;
 358       asymbol *sym;
 359       int n;
 360
 361       ptr = sec->orelocation[idx];
 362       sym = *ptr->sym_ptr_ptr;
 363       if (sym == last_sym)
 364         n = last_sym_idx;
 365       else if (bfd_is_abs_section (sym->section) && sym->value == 0)
 366         n = STN_UNDEF;
 367       else
 368         {
 369           last_sym = sym;
 370           n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
 371           if (n < 0)
 372             {
 373               *failedp = TRUE;
 374               return;
 375             }
 376           last_sym_idx = n;
 377         }
 378
 379       if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
 380           && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
 381           && ! _bfd_elf_validate_reloc (abfd, ptr))
 382         {
 383           *failedp = TRUE;
 384           return;
 385         }
 386
 387       if (ptr->howto->type == R_SPARC_LO10
 388           && idx < sec->reloc_count - 1)
 389         {
 390           arelent *r = sec->orelocation[idx + 1];
 391
 392           if (r->howto->type == R_SPARC_13
 393               && r->address == ptr->address
 394               && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
 395               && (*r->sym_ptr_ptr)->value == 0)
 396             {
 397               idx++;
 398               dst_rela.r_info
 399                 = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend,
 400                                                       R_SPARC_OLO10));
 401             }
 402           else
 403             dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10);
 404         }
 405       else
 406         dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type);
 407
 408       dst_rela.r_offset = ptr->address + addr_offset;
 409       dst_rela.r_addend = ptr->addend;
 410
 411       bfd_elf64_swap_reloca_out (abfd, &dst_rela, (bfd_byte *) src_rela);
 412       ++src_rela;
 413     }
 414 }
 415 \f
 416 /* Hook called by the linker routine which adds symbols from an object
 417    file.  We use it for STT_REGISTER symbols.  */
 418
 419 static bfd_boolean
 420 elf64_sparc_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
 421                              Elf_Internal_Sym *sym, const char **namep,
 422                              flagword *flagsp ATTRIBUTE_UNUSED,
 423                              asection **secp ATTRIBUTE_UNUSED,
 424                              bfd_vma *valp ATTRIBUTE_UNUSED)
 425 {
 426   static const char *const stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" };
 427
 428   if ((abfd->flags & DYNAMIC) == 0
 429       && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
 430           || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
 431     elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
 432
 433   if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER)
 434     {
 435       int reg;
 436       struct _bfd_sparc_elf_app_reg *p;
 437
 438       reg = (int)sym->st_value;
 439       switch (reg & ~1)
 440         {
 441         case 2: reg -= 2; break;
 442         case 6: reg -= 4; break;
 443         default:
 444           (*_bfd_error_handler)
 445             (_("%B: Only registers %%g[2367] can be declared using STT_REGISTER"),
 446              abfd);
 447           return FALSE;
 448         }
 449
 450       if (info->output_bfd->xvec != abfd->xvec
 451           || (abfd->flags & DYNAMIC) != 0)
 452         {
 453           /* STT_REGISTER only works when linking an elf64_sparc object.
 454              If STT_REGISTER comes from a dynamic object, don't put it into
 455              the output bfd.  The dynamic linker will recheck it.  */
 456           *namep = NULL;
 457           return TRUE;
 458         }
 459
 460       p = _bfd_sparc_elf_hash_table(info)->app_regs + reg;
 461
 462       if (p->name != NULL && strcmp (p->name, *namep))
 463         {
 464           (*_bfd_error_handler)
 465             (_("Register %%g%d used incompatibly: %s in %B, previously %s in %B"),
 466              abfd, p->abfd, (int) sym->st_value,
 467              **namep ? *namep : "#scratch",
 468              *p->name ? p->name : "#scratch");
 469           return FALSE;
 470         }
 471
 472       if (p->name == NULL)
 473         {
 474           if (**namep)
 475             {
 476               struct elf_link_hash_entry *h;
 477
 478               h = (struct elf_link_hash_entry *)
 479                 bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE);
 480
 481               if (h != NULL)
 482                 {
 483                   unsigned char type = h->type;
 484
 485                   if (type > STT_FUNC)
 486                     type = 0;
 487                   (*_bfd_error_handler)
 488                     (_("Symbol `%s' has differing types: REGISTER in %B, previously %s in %B"),
 489                      abfd, p->abfd, *namep, stt_types[type]);
 490                   return FALSE;
 491                 }
 492
 493               p->name = bfd_hash_allocate (&info->hash->table,
 494                                            strlen (*namep) + 1);
 495               if (!p->name)
 496                 return FALSE;
 497
 498               strcpy (p->name, *namep);
 499             }
 500           else
 501             p->name = "";
 502           p->bind = ELF_ST_BIND (sym->st_info);
 503           p->abfd = abfd;
 504           p->shndx = sym->st_shndx;
 505         }
 506       else
 507         {
 508           if (p->bind == STB_WEAK
 509               && ELF_ST_BIND (sym->st_info) == STB_GLOBAL)
 510             {
 511               p->bind = STB_GLOBAL;
 512               p->abfd = abfd;
 513             }
 514         }
 515       *namep = NULL;
 516       return TRUE;
 517     }
 518   else if (*namep && **namep
 519            && info->output_bfd->xvec == abfd->xvec)
 520     {
 521       int i;
 522       struct _bfd_sparc_elf_app_reg *p;
 523
 524       p = _bfd_sparc_elf_hash_table(info)->app_regs;
 525       for (i = 0; i < 4; i++, p++)
 526         if (p->name != NULL && ! strcmp (p->name, *namep))
 527           {
 528             unsigned char type = ELF_ST_TYPE (sym->st_info);
 529
 530             if (type > STT_FUNC)
 531               type = 0;
 532             (*_bfd_error_handler)
 533               (_("Symbol `%s' has differing types: %s in %B, previously REGISTER in %B"),
 534                abfd, p->abfd, *namep, stt_types[type]);
 535             return FALSE;
 536           }
 537     }
 538   return TRUE;
 539 }
 540
 541 /* This function takes care of emitting STT_REGISTER symbols
 542    which we cannot easily keep in the symbol hash table.  */
 543
 544 static bfd_boolean
 545 elf64_sparc_output_arch_syms (bfd *output_bfd ATTRIBUTE_UNUSED,
 546                               struct bfd_link_info *info,
 547                               PTR finfo,
 548                               int (*func) (PTR, const char *,
 549                                            Elf_Internal_Sym *,
 550                                            asection *,
 551                                            struct elf_link_hash_entry *))
 552 {
 553   int reg;
 554   struct _bfd_sparc_elf_app_reg *app_regs =
 555     _bfd_sparc_elf_hash_table(info)->app_regs;
 556   Elf_Internal_Sym sym;
 557
 558   /* We arranged in size_dynamic_sections to put the STT_REGISTER entries
 559      at the end of the dynlocal list, so they came at the end of the local
 560      symbols in the symtab.  Except that they aren't STB_LOCAL, so we need
 561      to back up symtab->sh_info.  */
 562   if (elf_hash_table (info)->dynlocal)
 563     {
 564       bfd * dynobj = elf_hash_table (info)->dynobj;
 565       asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym");
 566       struct elf_link_local_dynamic_entry *e;
 567
 568       for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
 569         if (e->input_indx == -1)
 570           break;
 571       if (e)
 572         {
 573           elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
 574             = e->dynindx;
 575         }
 576     }
 577
 578   if (info->strip == strip_all)
 579     return TRUE;
 580
 581   for (reg = 0; reg < 4; reg++)
 582     if (app_regs [reg].name != NULL)
 583       {
 584         if (info->strip == strip_some
 585             && bfd_hash_lookup (info->keep_hash,
 586                                 app_regs [reg].name,
 587                                 FALSE, FALSE) == NULL)
 588           continue;
 589
 590         sym.st_value = reg < 2 ? reg + 2 : reg + 4;
 591         sym.st_size = 0;
 592         sym.st_other = 0;
 593         sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER);
 594         sym.st_shndx = app_regs [reg].shndx;
 595         sym.st_target_internal = 0;
 596         if ((*func) (finfo, app_regs [reg].name, &sym,
 597                      sym.st_shndx == SHN_ABS
 598                      ? bfd_abs_section_ptr : bfd_und_section_ptr,
 599                      NULL) != 1)
 600           return FALSE;
 601       }
 602
 603   return TRUE;
 604 }
 605
 606 static int
 607 elf64_sparc_get_symbol_type (Elf_Internal_Sym *elf_sym, int type)
 608 {
 609   if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER)
 610     return STT_REGISTER;
 611   else
 612     return type;
 613 }
 614
 615 /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL
 616    even in SHN_UNDEF section.  */
 617
 618 static void
 619 elf64_sparc_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym)
 620 {
 621   elf_symbol_type *elfsym;
 622
 623   elfsym = (elf_symbol_type *) asym;
 624   if (elfsym->internal_elf_sym.st_info
 625       == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER))
 626     {
 627       asym->flags |= BSF_GLOBAL;
 628     }
 629 }
 630
 631 \f
 632 /* Functions for dealing with the e_flags field.  */
 633
 634 /* Merge backend specific data from an object file to the output
 635    object file when linking.  */
 636
 637 static bfd_boolean
 638 elf64_sparc_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
 639 {
 640   bfd_boolean error;
 641   flagword new_flags, old_flags;
 642   int new_mm, old_mm;
 643
 644   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
 645       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
 646     return TRUE;
 647
 648   new_flags = elf_elfheader (ibfd)->e_flags;
 649   old_flags = elf_elfheader (obfd)->e_flags;
 650
 651   if (!elf_flags_init (obfd))   /* First call, no flags set */
 652     {
 653       elf_flags_init (obfd) = TRUE;
 654       elf_elfheader (obfd)->e_flags = new_flags;
 655     }
 656
 657   else if (new_flags == old_flags)      /* Compatible flags are ok */
 658     ;
 659
 660   else                                  /* Incompatible flags */
 661     {
 662       error = FALSE;
 663
 664 #define EF_SPARC_ISA_EXTENSIONS \
 665   (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1)
 666
 667       if ((ibfd->flags & DYNAMIC) != 0)
 668         {
 669           /* We don't want dynamic objects memory ordering and
 670              architecture to have any role. That's what dynamic linker
 671              should do.  */
 672           new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS);
 673           new_flags |= (old_flags
 674                         & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS));
 675         }
 676       else
 677         {
 678           /* Choose the highest architecture requirements.  */
 679           old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS);
 680           new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS);
 681           if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3))
 682               && (old_flags & EF_SPARC_HAL_R1))
 683             {
 684               error = TRUE;
 685               (*_bfd_error_handler)
 686                 (_("%B: linking UltraSPARC specific with HAL specific code"),
 687                  ibfd);
 688             }
 689           /* Choose the most restrictive memory ordering.  */
 690           old_mm = (old_flags & EF_SPARCV9_MM);
 691           new_mm = (new_flags & EF_SPARCV9_MM);
 692           old_flags &= ~EF_SPARCV9_MM;
 693           new_flags &= ~EF_SPARCV9_MM;
 694           if (new_mm < old_mm)
 695             old_mm = new_mm;
 696           old_flags |= old_mm;
 697           new_flags |= old_mm;
 698         }
 699
 700       /* Warn about any other mismatches */
 701       if (new_flags != old_flags)
 702         {
 703           error = TRUE;
 704           (*_bfd_error_handler)
 705             (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
 706              ibfd, (long) new_flags, (long) old_flags);
 707         }
 708
 709       elf_elfheader (obfd)->e_flags = old_flags;
 710
 711       if (error)
 712         {
 713           bfd_set_error (bfd_error_bad_value);
 714           return FALSE;
 715         }
 716     }
 717   return TRUE;
 718 }
 719
 720 /* MARCO: Set the correct entry size for the .stab section.  */
 721
 722 static bfd_boolean
 723 elf64_sparc_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
 724                            Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED,
 725                            asection *sec)
 726 {
 727   const char *name;
 728
 729   name = bfd_get_section_name (abfd, sec);
 730
 731   if (strcmp (name, ".stab") == 0)
 732     {
 733       /* Even in the 64bit case the stab entries are only 12 bytes long.  */
 734       elf_section_data (sec)->this_hdr.sh_entsize = 12;
 735     }
 736
 737   return TRUE;
 738 }
 739 \f
 740 /* Print a STT_REGISTER symbol to file FILE.  */
 741
 742 static const char *
 743 elf64_sparc_print_symbol_all (bfd *abfd ATTRIBUTE_UNUSED, PTR filep,
 744                               asymbol *symbol)
 745 {
 746   FILE *file = (FILE *) filep;
 747   int reg, type;
 748
 749   if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info)
 750       != STT_REGISTER)
 751     return NULL;
 752
 753   reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
 754   type = symbol->flags;
 755   fprintf (file, "REG_%c%c%11s%c%c    R", "GOLI" [reg / 8], '0' + (reg & 7), "",
 756                  ((type & BSF_LOCAL)
 757                   ? (type & BSF_GLOBAL) ? '!' : 'l'
 758                   : (type & BSF_GLOBAL) ? 'g' : ' '),
 759                  (type & BSF_WEAK) ? 'w' : ' ');
 760   if (symbol->name == NULL || symbol->name [0] == '\0')
 761     return "#scratch";
 762   else
 763     return symbol->name;
 764 }
 765 \f
 766 static enum elf_reloc_type_class
 767 elf64_sparc_reloc_type_class (const Elf_Internal_Rela *rela)
 768 {
 769   switch ((int) ELF64_R_TYPE (rela->r_info))
 770     {
 771     case R_SPARC_RELATIVE:
 772       return reloc_class_relative;
 773     case R_SPARC_JMP_SLOT:
 774       return reloc_class_plt;
 775     case R_SPARC_COPY:
 776       return reloc_class_copy;
 777     default:
 778       return reloc_class_normal;
 779     }
 780 }
 781
 782 /* Relocations in the 64 bit SPARC ELF ABI are more complex than in
 783    standard ELF, because R_SPARC_OLO10 has secondary addend in
 784    ELF64_R_TYPE_DATA field.  This structure is used to redirect the
 785    relocation handling routines.  */
 786
 787 const struct elf_size_info elf64_sparc_size_info =
 788 {
 789   sizeof (Elf64_External_Ehdr),
 790   sizeof (Elf64_External_Phdr),
 791   sizeof (Elf64_External_Shdr),
 792   sizeof (Elf64_External_Rel),
 793   sizeof (Elf64_External_Rela),
 794   sizeof (Elf64_External_Sym),
 795   sizeof (Elf64_External_Dyn),
 796   sizeof (Elf_External_Note),
 797   4,            /* hash-table entry size.  */
 798   /* Internal relocations per external relocations.
 799      For link purposes we use just 1 internal per
 800      1 external, for assembly and slurp symbol table
 801      we use 2.  */
 802   1,
 803   64,           /* arch_size.  */
 804   3,            /* log_file_align.  */
 805   ELFCLASS64,
 806   EV_CURRENT,
 807   bfd_elf64_write_out_phdrs,
 808   bfd_elf64_write_shdrs_and_ehdr,
 809   bfd_elf64_checksum_contents,
 810   elf64_sparc_write_relocs,
 811   bfd_elf64_swap_symbol_in,
 812   bfd_elf64_swap_symbol_out,
 813   elf64_sparc_slurp_reloc_table,
 814   bfd_elf64_slurp_symbol_table,
 815   bfd_elf64_swap_dyn_in,
 816   bfd_elf64_swap_dyn_out,
 817   bfd_elf64_swap_reloc_in,
 818   bfd_elf64_swap_reloc_out,
 819   bfd_elf64_swap_reloca_in,
 820   bfd_elf64_swap_reloca_out
 821 };
 822
 823 #define TARGET_BIG_SYM  bfd_elf64_sparc_vec
 824 #define TARGET_BIG_NAME "elf64-sparc"
 825 #define ELF_ARCH        bfd_arch_sparc
 826 #define ELF_MAXPAGESIZE 0x100000
 827 #define ELF_COMMONPAGESIZE 0x2000
 828
 829 /* This is the official ABI value.  */
 830 #define ELF_MACHINE_CODE EM_SPARCV9
 831
 832 /* This is the value that we used before the ABI was released.  */
 833 #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9
 834
 835 #define elf_backend_reloc_type_class \
 836   elf64_sparc_reloc_type_class
 837 #define bfd_elf64_get_reloc_upper_bound \
 838   elf64_sparc_get_reloc_upper_bound
 839 #define bfd_elf64_get_dynamic_reloc_upper_bound \
 840   elf64_sparc_get_dynamic_reloc_upper_bound
 841 #define bfd_elf64_canonicalize_reloc \
 842   elf64_sparc_canonicalize_reloc
 843 #define bfd_elf64_canonicalize_dynamic_reloc \
 844   elf64_sparc_canonicalize_dynamic_reloc
 845 #define elf_backend_add_symbol_hook \
 846   elf64_sparc_add_symbol_hook
 847 #define elf_backend_get_symbol_type \
 848   elf64_sparc_get_symbol_type
 849 #define elf_backend_symbol_processing \
 850   elf64_sparc_symbol_processing
 851 #define elf_backend_print_symbol_all \
 852   elf64_sparc_print_symbol_all
 853 #define elf_backend_output_arch_syms \
 854   elf64_sparc_output_arch_syms
 855 #define bfd_elf64_bfd_merge_private_bfd_data \
 856   elf64_sparc_merge_private_bfd_data
 857 #define elf_backend_fake_sections \
 858   elf64_sparc_fake_sections
 859 #define elf_backend_size_info \
 860   elf64_sparc_size_info
 861
 862 #define elf_backend_plt_sym_val \
 863   _bfd_sparc_elf_plt_sym_val
 864 #define bfd_elf64_bfd_link_hash_table_create \
 865   _bfd_sparc_elf_link_hash_table_create
 866 #define bfd_elf64_bfd_link_hash_table_free \
 867   _bfd_sparc_elf_link_hash_table_free
 868 #define elf_info_to_howto \
 869   _bfd_sparc_elf_info_to_howto
 870 #define elf_backend_copy_indirect_symbol \
 871   _bfd_sparc_elf_copy_indirect_symbol
 872 #define bfd_elf64_bfd_reloc_type_lookup \
 873   _bfd_sparc_elf_reloc_type_lookup
 874 #define bfd_elf64_bfd_reloc_name_lookup \
 875   _bfd_sparc_elf_reloc_name_lookup
 876 #define bfd_elf64_bfd_relax_section \
 877   _bfd_sparc_elf_relax_section
 878 #define bfd_elf64_new_section_hook \
 879   _bfd_sparc_elf_new_section_hook
 880
 881 #define elf_backend_create_dynamic_sections \
 882   _bfd_sparc_elf_create_dynamic_sections
 883 #define elf_backend_relocs_compatible \
 884   _bfd_elf_relocs_compatible
 885 #define elf_backend_check_relocs \
 886   _bfd_sparc_elf_check_relocs
 887 #define elf_backend_adjust_dynamic_symbol \
 888   _bfd_sparc_elf_adjust_dynamic_symbol
 889 #define elf_backend_omit_section_dynsym \
 890   _bfd_sparc_elf_omit_section_dynsym
 891 #define elf_backend_size_dynamic_sections \
 892   _bfd_sparc_elf_size_dynamic_sections
 893 #define elf_backend_relocate_section \
 894   _bfd_sparc_elf_relocate_section
 895 #define elf_backend_finish_dynamic_symbol \
 896   _bfd_sparc_elf_finish_dynamic_symbol
 897 #define elf_backend_finish_dynamic_sections \
 898   _bfd_sparc_elf_finish_dynamic_sections
 899
 900 #define bfd_elf64_mkobject \
 901   _bfd_sparc_elf_mkobject
 902 #define elf_backend_object_p \
 903   _bfd_sparc_elf_object_p
 904 #define elf_backend_gc_mark_hook \
 905   _bfd_sparc_elf_gc_mark_hook
 906 #define elf_backend_gc_sweep_hook \
 907   _bfd_sparc_elf_gc_sweep_hook
 908 #define elf_backend_init_index_section \
 909   _bfd_elf_init_1_index_section
 910
 911 #define elf_backend_can_gc_sections 1
 912 #define elf_backend_can_refcount 1
 913 #define elf_backend_want_got_plt 0
 914 #define elf_backend_plt_readonly 0
 915 #define elf_backend_want_plt_sym 1
 916 #define elf_backend_got_header_size 8
 917 #define elf_backend_rela_normal 1
 918
 919 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table.  */
 920 #define elf_backend_plt_alignment 8
 921
 922 #define elf_backend_post_process_headers        _bfd_elf_set_osabi
 923
 924 #include "elf64-target.h"
 925
 926 /* FreeBSD support */
 927 #undef  TARGET_BIG_SYM
 928 #define TARGET_BIG_SYM bfd_elf64_sparc_freebsd_vec
 929 #undef  TARGET_BIG_NAME
 930 #define TARGET_BIG_NAME "elf64-sparc-freebsd"
 931 #undef  ELF_OSABI
 932 #define ELF_OSABI ELFOSABI_FREEBSD
 933
 934 #undef  elf64_bed
 935 #define elf64_bed                               elf64_sparc_fbsd_bed
 936
 937 #include "elf64-target.h"
 938
 939 /* Solaris 2.  */
 940
 941 #undef  TARGET_BIG_SYM
 942 #define TARGET_BIG_SYM                          bfd_elf64_sparc_sol2_vec
 943 #undef  TARGET_BIG_NAME
 944 #define TARGET_BIG_NAME                         "elf64-sparc-sol2"
 945
 946 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
 947    objects won't be recognized.  */
 948 #undef  ELF_OSABI
 949
 950 #undef elf64_bed
 951 #define elf64_bed                               elf64_sparc_sol2_bed
 952
 953 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
 954    boundary.  */
 955 #undef elf_backend_static_tls_alignment
 956 #define elf_backend_static_tls_alignment        16
 957
 958 #include "elf64-target.h"