bfd/elf32-sh64.c

   1 /* SuperH SH64-specific support for 32-bit ELF
   2    Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
   3    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 2 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, MA 02110-1301, USA.  */
  20
  21 #define SH64_ELF
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "elf-bfd.h"
  26 #include "../opcodes/sh64-opc.h"
  27 #include "elf32-sh64.h"
  28
  29 /* Add a suffix for datalabel indirection symbols.  It must not match any
  30    other symbols; user symbols with or without version or other
  31    decoration.  It must only be used internally and not emitted by any
  32    means.  */
  33 #define DATALABEL_SUFFIX " DL"
  34
  35 /* Used to hold data for function called through bfd_map_over_sections.  */
  36 struct sh64_find_section_vma_data
  37  {
  38    asection *section;
  39    bfd_vma addr;
  40  };
  41
  42 static bfd_boolean sh64_elf_new_section_hook
  43   (bfd *, asection *);
  44 static bfd_boolean sh64_elf_copy_private_data
  45   (bfd *, bfd *);
  46 static bfd_boolean sh64_elf_merge_private_data
  47   (bfd *, bfd *);
  48 static bfd_boolean sh64_elf_fake_sections
  49   (bfd *, Elf_Internal_Shdr *, asection *);
  50 static bfd_boolean sh64_elf_set_private_flags
  51   (bfd *, flagword);
  52 static bfd_boolean sh64_elf_set_mach_from_flags
  53   (bfd *);
  54 static bfd_boolean shmedia_prepare_reloc
  55   (struct bfd_link_info *, bfd *, asection *, bfd_byte *,
  56    const Elf_Internal_Rela *, bfd_vma *);
  57 static int sh64_elf_get_symbol_type
  58   (Elf_Internal_Sym *, int);
  59 static bfd_boolean sh64_elf_add_symbol_hook
  60   (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, const char **,
  61    flagword *, asection **, bfd_vma *);
  62 static bfd_boolean sh64_elf_link_output_symbol_hook
  63   (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *,
  64    struct elf_link_hash_entry *);
  65 static bfd_boolean sh64_backend_section_from_shdr
  66   (bfd *, Elf_Internal_Shdr *, const char *, int);
  67 static void sh64_elf_final_write_processing
  68   (bfd *, bfd_boolean);
  69 static bfd_boolean sh64_bfd_elf_copy_private_section_data
  70   (bfd *, asection *, bfd *, asection *);
  71 static void sh64_find_section_for_address
  72   (bfd *, asection *, void *);
  73
  74 /* Let elf32-sh.c handle the "bfd_" definitions, so we only have to
  75    intrude with an #ifndef around the function definition.  */
  76 #define sh_elf_copy_private_data                sh64_elf_copy_private_data
  77 #define sh_elf_merge_private_data               sh64_elf_merge_private_data
  78 #define sh_elf_set_private_flags                sh64_elf_set_private_flags
  79 /* Typo in elf32-sh.c (and unlinear name).  */
  80 #define bfd_elf32_bfd_set_private_flags         sh64_elf_set_private_flags
  81 #define sh_elf_set_mach_from_flags              sh64_elf_set_mach_from_flags
  82
  83 #define elf_backend_sign_extend_vma             1
  84 #define elf_backend_fake_sections               sh64_elf_fake_sections
  85 #define elf_backend_get_symbol_type             sh64_elf_get_symbol_type
  86 #define elf_backend_add_symbol_hook             sh64_elf_add_symbol_hook
  87 #define elf_backend_link_output_symbol_hook \
  88         sh64_elf_link_output_symbol_hook
  89 #define elf_backend_merge_symbol_attribute      sh64_elf_merge_symbol_attribute
  90 #define elf_backend_final_write_processing      sh64_elf_final_write_processing
  91 #define elf_backend_section_from_shdr           sh64_backend_section_from_shdr
  92 #define elf_backend_special_sections            sh64_elf_special_sections
  93 #define elf_backend_section_flags               sh64_elf_section_flags
  94
  95 #define bfd_elf32_new_section_hook              sh64_elf_new_section_hook
  96
  97 /* For objcopy, we need to set up sh64_elf_section_data (asection *) from
  98    incoming section flags.  This is otherwise done in sh64elf.em when
  99    linking or tc-sh64.c when assembling.  */
 100 #define bfd_elf32_bfd_copy_private_section_data \
 101         sh64_bfd_elf_copy_private_section_data
 102
 103 /* This COFF-only function (only compiled with COFF support, making
 104    ELF-only chains problematic) returns TRUE early for SH4, so let's just
 105    define it TRUE here.  */
 106 #define _bfd_sh_align_load_span(a,b,c,d,e,f,g,h,i,j) TRUE
 107
 108 #define GOT_BIAS (-((long)-32768))
 109 #define INCLUDE_SHMEDIA
 110 #define SH_TARGET_ALREADY_DEFINED
 111 #include "elf32-sh.c"
 112
 113 /* Tack some extra info on struct bfd_elf_section_data.  */
 114
 115 static bfd_boolean
 116 sh64_elf_new_section_hook (bfd *abfd, asection *sec)
 117 {
 118   if (!sec->used_by_bfd)
 119     {
 120       struct _sh64_elf_section_data *sdata;
 121       bfd_size_type amt = sizeof (*sdata);
 122
 123       sdata = bfd_zalloc (abfd, amt);
 124       if (sdata == NULL)
 125         return FALSE;
 126       sec->used_by_bfd = sdata;
 127     }
 128
 129   return _bfd_elf_new_section_hook (abfd, sec);
 130 }
 131
 132 /* Set the SHF_SH5_ISA32 flag for ISA SHmedia code sections, and pass
 133    through SHT_SH5_CR_SORTED on a sorted .cranges section.  */
 134
 135 bfd_boolean
 136 sh64_elf_fake_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
 137                         Elf_Internal_Shdr *elf_section_hdr,
 138                         asection *asect)
 139 {
 140   if (sh64_elf_section_data (asect)->sh64_info != NULL)
 141     elf_section_hdr->sh_flags
 142       |= sh64_elf_section_data (asect)->sh64_info->contents_flags;
 143
 144   /* If this section has the SEC_SORT_ENTRIES flag set, it is a sorted
 145      .cranges section passing through objcopy.  */
 146   if ((bfd_get_section_flags (output_bfd, asect) & SEC_SORT_ENTRIES) != 0
 147       && strcmp (bfd_get_section_name (output_bfd, asect),
 148                  SH64_CRANGES_SECTION_NAME) == 0)
 149     elf_section_hdr->sh_type = SHT_SH5_CR_SORTED;
 150
 151   return TRUE;
 152 }
 153
 154 static bfd_boolean
 155 sh64_elf_set_mach_from_flags (bfd *abfd)
 156 {
 157   flagword flags = elf_elfheader (abfd)->e_flags;
 158
 159   switch (flags & EF_SH_MACH_MASK)
 160     {
 161     case EF_SH5:
 162       /* These are fit to execute on SH5.  Just one but keep the switch
 163          construct to make additions easy.  */
 164       bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh5);
 165       break;
 166
 167     default:
 168       bfd_set_error (bfd_error_wrong_format);
 169       return FALSE;
 170     }
 171
 172   return TRUE;
 173 }
 174
 175 static bfd_boolean
 176 sh64_elf_section_flags (flagword *flags,
 177                         const Elf_Internal_Shdr *hdr)
 178 {
 179   if (hdr->bfd_section == NULL)
 180     return FALSE;
 181
 182   if (strcmp (hdr->bfd_section->name, SH64_CRANGES_SECTION_NAME) == 0)
 183     *flags |= SEC_DEBUGGING;
 184
 185   return TRUE;
 186 }
 187
 188 static bfd_boolean
 189 sh64_elf_copy_private_data (bfd * ibfd, bfd * obfd)
 190 {
 191   if (   bfd_get_flavour (ibfd) != bfd_target_elf_flavour
 192       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
 193     return TRUE;
 194
 195   BFD_ASSERT (!elf_flags_init (obfd)
 196               || (elf_elfheader (obfd)->e_flags
 197                   == elf_elfheader (ibfd)->e_flags));
 198
 199   elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
 200   return TRUE;
 201 }
 202
 203 static bfd_boolean
 204 sh64_elf_merge_private_data (bfd *ibfd, bfd *obfd)
 205 {
 206   flagword old_flags, new_flags;
 207
 208   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
 209     return FALSE;
 210
 211   if (   bfd_get_flavour (ibfd) != bfd_target_elf_flavour
 212       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
 213     return TRUE;
 214
 215   if (bfd_get_arch_size (ibfd) != bfd_get_arch_size (obfd))
 216     {
 217       const char *msg;
 218
 219       if (bfd_get_arch_size (ibfd) == 32
 220           && bfd_get_arch_size (obfd) == 64)
 221         msg = _("%s: compiled as 32-bit object and %s is 64-bit");
 222       else if (bfd_get_arch_size (ibfd) == 64
 223                && bfd_get_arch_size (obfd) == 32)
 224         msg = _("%s: compiled as 64-bit object and %s is 32-bit");
 225       else
 226         msg = _("%s: object size does not match that of target %s");
 227
 228       (*_bfd_error_handler) (msg, bfd_get_filename (ibfd),
 229                              bfd_get_filename (obfd));
 230       bfd_set_error (bfd_error_wrong_format);
 231       return FALSE;
 232     }
 233
 234   old_flags = elf_elfheader (obfd)->e_flags;
 235   new_flags = elf_elfheader (ibfd)->e_flags;
 236   if (! elf_flags_init (obfd))
 237     {
 238       /* This happens when ld starts out with a 'blank' output file.  */
 239       elf_flags_init (obfd) = TRUE;
 240       elf_elfheader (obfd)->e_flags = old_flags = new_flags;
 241     }
 242   /* We don't allow linking in non-SH64 code.  */
 243   else if ((new_flags & EF_SH_MACH_MASK) != EF_SH5)
 244     {
 245       (*_bfd_error_handler)
 246         ("%s: uses non-SH64 instructions while previous modules use SH64 instructions",
 247          bfd_get_filename (ibfd));
 248       bfd_set_error (bfd_error_bad_value);
 249       return FALSE;
 250     }
 251
 252   /* I can't think of anything sane other than old_flags being EF_SH5 and
 253      that we need to preserve that.  */
 254   elf_elfheader (obfd)->e_flags = old_flags;
 255   return sh64_elf_set_mach_from_flags (obfd);
 256 }
 257
 258 /* Handle a SH64-specific section when reading an object file.  This
 259    is called when bfd_section_from_shdr finds a section with an unknown
 260    type.
 261
 262    We only recognize SHT_SH5_CR_SORTED, on the .cranges section.  */
 263
 264 bfd_boolean
 265 sh64_backend_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
 266                                 const char *name, int shindex)
 267 {
 268   flagword flags = 0;
 269
 270   /* We do like MIPS with a bit switch for recognized types, and returning
 271      FALSE for a recognized section type with an unexpected name.  Right
 272      now we only have one recognized type, but that might change.  */
 273   switch (hdr->sh_type)
 274     {
 275     case SHT_SH5_CR_SORTED:
 276       if (strcmp (name, SH64_CRANGES_SECTION_NAME) != 0)
 277         return FALSE;
 278
 279       /* We set the SEC_SORT_ENTRIES flag so it can be passed on to
 280          sh64_elf_fake_sections, keeping SHT_SH5_CR_SORTED if this object
 281          passes through objcopy.  Perhaps it is brittle; the flag can
 282          suddenly be used by other BFD parts, but it seems not really used
 283          anywhere at the moment.  */
 284       flags = SEC_DEBUGGING | SEC_SORT_ENTRIES;
 285       break;
 286
 287     default:
 288       return FALSE;
 289     }
 290
 291   if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
 292     return FALSE;
 293
 294   if (flags
 295       && ! bfd_set_section_flags (abfd, hdr->bfd_section,
 296                                   bfd_get_section_flags (abfd,
 297                                                          hdr->bfd_section)
 298                                   | flags))
 299     return FALSE;
 300
 301   return TRUE;
 302 }
 303
 304 /* In contrast to sh64_backend_section_from_shdr, this is called for all
 305    sections, but only when copying sections, not when linking or
 306    assembling.  We need to set up the sh64_elf_section_data (asection *)
 307    structure for the SH64 ELF section flags to be copied correctly.  */
 308
 309 bfd_boolean
 310 sh64_bfd_elf_copy_private_section_data (bfd *ibfd, asection *isec,
 311                                         bfd *obfd, asection *osec)
 312 {
 313   struct sh64_section_data *sh64_sec_data;
 314
 315   if (ibfd->xvec->flavour != bfd_target_elf_flavour
 316       || obfd->xvec->flavour != bfd_target_elf_flavour)
 317     return TRUE;
 318
 319   if (! _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec))
 320     return FALSE;
 321
 322   sh64_sec_data = sh64_elf_section_data (isec)->sh64_info;
 323   if (sh64_sec_data == NULL)
 324     {
 325       sh64_sec_data = bfd_zmalloc (sizeof (struct sh64_section_data));
 326
 327       if (sh64_sec_data == NULL)
 328         return FALSE;
 329
 330       sh64_sec_data->contents_flags
 331         = (elf_section_data (isec)->this_hdr.sh_flags
 332            & (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED));
 333
 334       sh64_elf_section_data (osec)->sh64_info = sh64_sec_data;
 335     }
 336
 337   return TRUE;
 338 }
 339
 340 /* Function to keep SH64 specific file flags.  */
 341
 342 static bfd_boolean
 343 sh64_elf_set_private_flags (bfd *abfd, flagword flags)
 344 {
 345   BFD_ASSERT (! elf_flags_init (abfd)
 346               || elf_elfheader (abfd)->e_flags == flags);
 347
 348   elf_elfheader (abfd)->e_flags = flags;
 349   elf_flags_init (abfd) = TRUE;
 350   return sh64_elf_set_mach_from_flags (abfd);
 351 }
 352
 353 /* Called when writing out an object file to decide the type of a symbol.  */
 354
 355 static int
 356 sh64_elf_get_symbol_type (Elf_Internal_Sym *elf_sym, int type)
 357 {
 358   if (ELF_ST_TYPE (elf_sym->st_info) == STT_DATALABEL)
 359     return STT_DATALABEL;
 360
 361   return type;
 362 }
 363
 364 /* Hook called by the linker routine which adds symbols from an object
 365    file.  We must make indirect symbols for undefined symbols marked with
 366    STT_DATALABEL, so relocations passing them will pick up that attribute
 367    and neutralize STO_SH5_ISA32 found on the symbol definition.
 368
 369    There is a problem, though: We want to fill in the hash-table entry for
 370    this symbol and signal to the caller that no further processing is
 371    needed.  But we don't have the index for this hash-table entry.  We
 372    rely here on that the current entry is the first hash-entry with NULL,
 373    which seems brittle.  Also, iterating over the hash-table to find that
 374    entry is a linear operation on the number of symbols in this input
 375    file, and this function should take constant time, so that's not good
 376    too.  Only comfort is that DataLabel references should only be found in
 377    hand-written assembly code and thus be rare.  FIXME: Talk maintainers
 378    into adding an option to elf_add_symbol_hook (preferably) for the index
 379    or the hash entry, alternatively adding the index to Elf_Internal_Sym
 380    (not so good).  */
 381
 382 static bfd_boolean
 383 sh64_elf_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
 384                           Elf_Internal_Sym *sym, const char **namep,
 385                           flagword *flagsp ATTRIBUTE_UNUSED,
 386                           asection **secp, bfd_vma *valp)
 387 {
 388   /* We want to do this for relocatable as well as final linking.  */
 389   if (ELF_ST_TYPE (sym->st_info) == STT_DATALABEL
 390       && is_elf_hash_table (info->hash))
 391     {
 392       struct elf_link_hash_entry *h;
 393
 394       /* For relocatable links, we register the DataLabel sym in its own
 395          right, and tweak the name when it's output.  Otherwise, we make
 396          an indirect symbol of it.  */
 397       flagword flags
 398         = info->relocatable || info->emitrelocations
 399         ? BSF_GLOBAL : BSF_GLOBAL | BSF_INDIRECT;
 400
 401       char *dl_name
 402         = bfd_malloc (strlen (*namep) + sizeof (DATALABEL_SUFFIX));
 403       struct elf_link_hash_entry ** sym_hash = elf_sym_hashes (abfd);
 404
 405       BFD_ASSERT (sym_hash != NULL);
 406
 407       /* Allocation may fail.  */
 408       if (dl_name == NULL)
 409         return FALSE;
 410
 411       strcpy (dl_name, *namep);
 412       strcat (dl_name, DATALABEL_SUFFIX);
 413
 414       h = (struct elf_link_hash_entry *)
 415         bfd_link_hash_lookup (info->hash, dl_name, FALSE, FALSE, FALSE);
 416
 417       if (h == NULL)
 418         {
 419           /* No previous datalabel symbol.  Make one.  */
 420           struct bfd_link_hash_entry *bh = NULL;
 421           const struct elf_backend_data *bed = get_elf_backend_data (abfd);
 422
 423           if (! _bfd_generic_link_add_one_symbol (info, abfd, dl_name,
 424                                                   flags, *secp, *valp,
 425                                                   *namep, FALSE,
 426                                                   bed->collect, &bh))
 427             {
 428               free (dl_name);
 429               return FALSE;
 430             }
 431
 432           h = (struct elf_link_hash_entry *) bh;
 433           h->non_elf = 0;
 434           h->type = STT_DATALABEL;
 435         }
 436       else
 437         /* If a new symbol was created, it holds the allocated name.
 438            Otherwise, we don't need it anymore and should deallocate it.  */
 439         free (dl_name);
 440
 441       if (h->type != STT_DATALABEL
 442           || ((info->relocatable || info->emitrelocations)
 443               && h->root.type != bfd_link_hash_undefined)
 444           || (! info->relocatable && !info->emitrelocations
 445               && h->root.type != bfd_link_hash_indirect))
 446         {
 447           /* Make sure we don't get confused on invalid input.  */
 448           (*_bfd_error_handler)
 449             (_("%s: encountered datalabel symbol in input"),
 450              bfd_get_filename (abfd));
 451           bfd_set_error (bfd_error_bad_value);
 452           return FALSE;
 453         }
 454
 455       /* Now find the hash-table slot for this entry and fill it in.  */
 456       while (*sym_hash != NULL)
 457         sym_hash++;
 458       *sym_hash = h;
 459
 460       /* Signal to caller to skip this symbol - we've handled it.  */
 461       *namep = NULL;
 462     }
 463
 464   return TRUE;
 465 }
 466
 467 /* This hook function is called before the linker writes out a global
 468    symbol.  For relocatable links, DataLabel symbols will be present in
 469    linker output.  We cut off the special suffix on those symbols, so the
 470    right name appears in the output.
 471
 472    When linking and emitting relocations, there can appear global symbols
 473    that are not referenced by relocs, but rather only implicitly through
 474    DataLabel references, a relation that is not visible to the linker.
 475    Since no stripping of global symbols in done when doing such linking,
 476    we don't need to look up and make sure to emit the main symbol for each
 477    DataLabel symbol.  */
 478
 479 bfd_boolean
 480 sh64_elf_link_output_symbol_hook (struct bfd_link_info *info,
 481                                   const char *cname,
 482                                   Elf_Internal_Sym *sym,
 483                                   asection *input_sec ATTRIBUTE_UNUSED,
 484                                   struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
 485 {
 486   char *name = (char *) cname;
 487
 488   if (info->relocatable || info->emitrelocations)
 489     {
 490       if (ELF_ST_TYPE (sym->st_info) == STT_DATALABEL)
 491         name[strlen (name) - strlen (DATALABEL_SUFFIX)] = 0;
 492     }
 493
 494   return TRUE;
 495 }
 496
 497 /* Check a SH64-specific reloc and put the value to relocate to into
 498    RELOCATION, ready to pass to _bfd_final_link_relocate.  Return FALSE if
 499    bad value, TRUE if ok.  */
 500
 501 static bfd_boolean
 502 shmedia_prepare_reloc (struct bfd_link_info *info, bfd *abfd,
 503                        asection *input_section, bfd_byte *contents,
 504                        const Elf_Internal_Rela *rel, bfd_vma *relocation)
 505 {
 506   bfd_vma disp, dropped;
 507
 508   switch (ELF32_R_TYPE (rel->r_info))
 509     {
 510     case R_SH_PT_16:
 511       /* Check the lowest bit of the destination field.  If it is 1, we
 512          check the ISA type of the destination (i.e. the low bit of the
 513          "relocation" value, and emit an error if the instruction does not
 514          match).  If it is 0, we change a PTA to PTB.  There should never
 515          be a PTB that should change to a PTA; that indicates a toolchain
 516          error; a mismatch with GAS.  */
 517       {
 518         char *msg = NULL;
 519         bfd_vma insn = bfd_get_32 (abfd, contents + rel->r_offset);
 520
 521         if (insn & (1 << 10))
 522           {
 523             /* Check matching insn and ISA (address of target).  */
 524             if ((insn & SHMEDIA_PTB_BIT) != 0
 525                 && ((*relocation + rel->r_addend) & 1) != 0)
 526               msg = _("PTB mismatch: a SHmedia address (bit 0 == 1)");
 527             else if ((insn & SHMEDIA_PTB_BIT) == 0
 528                      && ((*relocation + rel->r_addend) & 1) == 0)
 529               msg = _("PTA mismatch: a SHcompact address (bit 0 == 0)");
 530
 531             if (msg != NULL
 532                 && ! ((*info->callbacks->reloc_dangerous)
 533                       (info, msg, abfd, input_section,
 534                        rel->r_offset)))
 535               return FALSE;
 536           }
 537         else
 538           {
 539             /* We shouldn't get here with a PTB insn and a R_SH_PT_16.  It
 540                means GAS output does not match expectations; a PTA or PTB
 541                expressed as such (or a PT found at assembly to be PTB)
 542                would match the test above, and PT expansion with an
 543                unknown destination (or when relaxing) will get us here.  */
 544             if ((insn & SHMEDIA_PTB_BIT) != 0)
 545               {
 546                 (*_bfd_error_handler)
 547                   (_("%s: GAS error: unexpected PTB insn with R_SH_PT_16"),
 548                    bfd_get_filename (input_section->owner));
 549                 return FALSE;
 550               }
 551
 552             /* Change the PTA to a PTB, if destination indicates so.  */
 553             if (((*relocation + rel->r_addend) & 1) == 0)
 554               bfd_put_32 (abfd, insn | SHMEDIA_PTB_BIT,
 555                           contents + rel->r_offset);
 556           }
 557       }
 558
 559     case R_SH_SHMEDIA_CODE:
 560     case R_SH_DIR5U:
 561     case R_SH_DIR6S:
 562     case R_SH_DIR6U:
 563     case R_SH_DIR10S:
 564     case R_SH_DIR10SW:
 565     case R_SH_DIR10SL:
 566     case R_SH_DIR10SQ:
 567     case R_SH_IMMS16:
 568     case R_SH_IMMU16:
 569     case R_SH_IMM_LOW16:
 570     case R_SH_IMM_LOW16_PCREL:
 571     case R_SH_IMM_MEDLOW16:
 572     case R_SH_IMM_MEDLOW16_PCREL:
 573     case R_SH_IMM_MEDHI16:
 574     case R_SH_IMM_MEDHI16_PCREL:
 575     case R_SH_IMM_HI16:
 576     case R_SH_IMM_HI16_PCREL:
 577     case R_SH_64:
 578     case R_SH_64_PCREL:
 579       break;
 580
 581     default:
 582       return FALSE;
 583     }
 584
 585   disp = (*relocation & 0xf);
 586   dropped = 0;
 587   switch (ELF32_R_TYPE (rel->r_info))
 588     {
 589     case R_SH_DIR10SW: dropped = disp & 1; break;
 590     case R_SH_DIR10SL: dropped = disp & 3; break;
 591     case R_SH_DIR10SQ: dropped = disp & 7; break;
 592     }
 593   if (dropped != 0)
 594     {
 595       (*_bfd_error_handler)
 596         (_("%B: error: unaligned relocation type %d at %08x reloc %p\n"),
 597          input_section->owner, ELF32_R_TYPE (rel->r_info),
 598          (unsigned) rel->r_offset, relocation);
 599       return FALSE;
 600     }
 601
 602   return TRUE;
 603 }
 604
 605 /* Helper function to locate the section holding a certain address.  This
 606    is called via bfd_map_over_sections.  */
 607
 608 static void
 609 sh64_find_section_for_address (bfd *abfd ATTRIBUTE_UNUSED,
 610                                asection *section, void *data)
 611 {
 612   bfd_vma vma;
 613   bfd_size_type size;
 614
 615   struct sh64_find_section_vma_data *fsec_datap
 616     = (struct sh64_find_section_vma_data *) data;
 617
 618   /* Return if already found.  */
 619   if (fsec_datap->section)
 620     return;
 621
 622   /* If this section isn't part of the addressable contents, skip it.  */
 623   if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
 624     return;
 625
 626   vma = bfd_get_section_vma (abfd, section);
 627   if (fsec_datap->addr < vma)
 628     return;
 629
 630   size = section->size;
 631   if (fsec_datap->addr >= vma + size)
 632     return;
 633
 634   fsec_datap->section = section;
 635 }
 636
 637 /* Make sure to write out the generated entries in the .cranges section
 638    when doing partial linking, and set bit 0 on the entry address if it
 639    points to SHmedia code and write sorted .cranges entries when writing
 640    executables (final linking and objcopy).  */
 641
 642 static void
 643 sh64_elf_final_write_processing (bfd *abfd,
 644                                  bfd_boolean linker ATTRIBUTE_UNUSED)
 645 {
 646   bfd_vma ld_generated_cranges_size;
 647   asection *cranges
 648     = bfd_get_section_by_name (abfd, SH64_CRANGES_SECTION_NAME);
 649
 650   /* If no new .cranges were added, the generic ELF linker parts will
 651      write it all out.  If not, we need to write them out when doing
 652      partial linking.  For a final link, we will sort them and write them
 653      all out further below.  */
 654   if (linker
 655       && cranges != NULL
 656       && elf_elfheader (abfd)->e_type != ET_EXEC
 657       && (ld_generated_cranges_size
 658           = sh64_elf_section_data (cranges)->sh64_info->cranges_growth) != 0)
 659     {
 660       bfd_vma incoming_cranges_size
 661         = cranges->size - ld_generated_cranges_size;
 662
 663       if (! bfd_set_section_contents (abfd, cranges,
 664                                       cranges->contents
 665                                       + incoming_cranges_size,
 666                                       cranges->output_offset
 667                                       + incoming_cranges_size,
 668                                       ld_generated_cranges_size))
 669         {
 670           bfd_set_error (bfd_error_file_truncated);
 671           (*_bfd_error_handler)
 672             (_("%s: could not write out added .cranges entries"),
 673              bfd_get_filename (abfd));
 674         }
 675     }
 676
 677   /* Only set entry address bit 0 and sort .cranges when linking to an
 678      executable; never with objcopy or strip.  */
 679   if (linker && elf_elfheader (abfd)->e_type == ET_EXEC)
 680     {
 681       struct sh64_find_section_vma_data fsec_data;
 682       sh64_elf_crange dummy;
 683
 684       /* For a final link, set the low bit of the entry address to
 685          reflect whether or not it is a SHmedia address.
 686          FIXME: Perhaps we shouldn't do this if the entry address was
 687          supplied numerically, but we currently lack the infrastructure to
 688          recognize that: The entry symbol, and info whether it is numeric
 689          or a symbol name is kept private in the linker.  */
 690       fsec_data.addr = elf_elfheader (abfd)->e_entry;
 691       fsec_data.section = NULL;
 692
 693       bfd_map_over_sections (abfd, sh64_find_section_for_address,
 694                              &fsec_data);
 695       if (fsec_data.section
 696           && (sh64_get_contents_type (fsec_data.section,
 697                                       elf_elfheader (abfd)->e_entry,
 698                                       &dummy) == CRT_SH5_ISA32))
 699         elf_elfheader (abfd)->e_entry |= 1;
 700
 701       /* If we have a .cranges section, sort the entries.  */
 702       if (cranges != NULL)
 703         {
 704           bfd_size_type cranges_size = cranges->size;
 705
 706           /* We know we always have these in memory at this time.  */
 707           BFD_ASSERT (cranges->contents != NULL);
 708
 709           /* The .cranges may already have been sorted in the process of
 710              finding out the ISA-type of the entry address.  If not, we do
 711              it here.  */
 712           if (elf_section_data (cranges)->this_hdr.sh_type
 713               != SHT_SH5_CR_SORTED)
 714             {
 715               qsort (cranges->contents, cranges_size / SH64_CRANGE_SIZE,
 716                      SH64_CRANGE_SIZE,
 717                      bfd_big_endian (cranges->owner)
 718                      ? _bfd_sh64_crange_qsort_cmpb
 719                      : _bfd_sh64_crange_qsort_cmpl);
 720               elf_section_data (cranges)->this_hdr.sh_type
 721                 = SHT_SH5_CR_SORTED;
 722             }
 723
 724           /* We need to write it out in whole as sorted.  */
 725           if (! bfd_set_section_contents (abfd, cranges,
 726                                           cranges->contents,
 727                                           cranges->output_offset,
 728                                           cranges_size))
 729             {
 730               bfd_set_error (bfd_error_file_truncated);
 731               (*_bfd_error_handler)
 732                 (_("%s: could not write out sorted .cranges entries"),
 733                  bfd_get_filename (abfd));
 734             }
 735         }
 736     }
 737 }
 738
 739 /* Merge non visibility st_other attribute when the symbol comes from
 740    a dynamic object.  */
 741 static void
 742 sh64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
 743                                  const Elf_Internal_Sym *isym,
 744                                  bfd_boolean definition,
 745                                  bfd_boolean dynamic ATTRIBUTE_UNUSED)
 746 {
 747   if ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) != 0)
 748     {
 749       unsigned char other;
 750
 751       /* Take the balance of OTHER from the definition.  */
 752       other = (definition ? isym->st_other : h->other);
 753       other &= ~ ELF_ST_VISIBILITY (-1);
 754       h->other = other | ELF_ST_VISIBILITY (h->other);
 755     }
 756
 757   return;
 758 }
 759
 760 static const struct bfd_elf_special_section sh64_elf_special_sections[] =
 761 {
 762   { STRING_COMMA_LEN (".cranges"), 0, SHT_PROGBITS, 0 },
 763   { NULL,                       0, 0, 0,            0 }
 764 };
 765
 766 #undef  TARGET_BIG_SYM
 767 #define TARGET_BIG_SYM          bfd_elf32_sh64_vec
 768 #undef  TARGET_BIG_NAME
 769 #define TARGET_BIG_NAME         "elf32-sh64"
 770 #undef  TARGET_LITTLE_SYM
 771 #define TARGET_LITTLE_SYM       bfd_elf32_sh64l_vec
 772 #undef  TARGET_LITTLE_NAME
 773 #define TARGET_LITTLE_NAME      "elf32-sh64l"
 774
 775 #include "elf32-target.h"
 776
 777 /* NetBSD support.  */
 778 #undef  TARGET_BIG_SYM
 779 #define TARGET_BIG_SYM          bfd_elf32_sh64nbsd_vec
 780 #undef  TARGET_BIG_NAME
 781 #define TARGET_BIG_NAME         "elf32-sh64-nbsd"
 782 #undef  TARGET_LITTLE_SYM
 783 #define TARGET_LITTLE_SYM       bfd_elf32_sh64lnbsd_vec
 784 #undef  TARGET_LITTLE_NAME
 785 #define TARGET_LITTLE_NAME      "elf32-sh64l-nbsd"
 786 #undef  ELF_MAXPAGESIZE
 787 #define ELF_MAXPAGESIZE         0x10000
 788 #undef  ELF_COMMONPAGESIZE
 789 #undef  elf_symbol_leading_char
 790 #define elf_symbol_leading_char 0
 791 #undef  elf32_bed
 792 #define elf32_bed               elf32_sh64_nbsd_bed
 793
 794 #include "elf32-target.h"
 795
 796 /* Linux support.  */
 797 #undef  TARGET_BIG_SYM
 798 #define TARGET_BIG_SYM          bfd_elf32_sh64blin_vec
 799 #undef  TARGET_BIG_NAME
 800 #define TARGET_BIG_NAME         "elf32-sh64big-linux"
 801 #undef  TARGET_LITTLE_SYM
 802 #define TARGET_LITTLE_SYM       bfd_elf32_sh64lin_vec
 803 #undef  TARGET_LITTLE_NAME
 804 #define TARGET_LITTLE_NAME      "elf32-sh64-linux"
 805 #undef  elf32_bed
 806 #define elf32_bed               elf32_sh64_lin_bed
 807 #undef  ELF_COMMONPAGESIZE
 808 #define ELF_COMMONPAGESIZE      0x1000
 809
 810 #include "elf32-target.h"
 811