bfd/elf-m10200.c

   1 /* Matsushita 10200 specific support for 32-bit ELF
   2    Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "elf-bfd.h"
  25
  26 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
  27   PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
  28 static void mn10200_info_to_howto
  29   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
  30 static boolean mn10200_elf_relax_delete_bytes
  31   PARAMS ((bfd *, asection *, bfd_vma, int));
  32 static boolean mn10200_elf_symbol_address_p
  33   PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
  34 static bfd_reloc_status_type mn10200_elf_final_link_relocate
  35   PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *,
  36            bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
  37            struct bfd_link_info *, asection *, int));
  38 static boolean mn10200_elf_relocate_section
  39 PARAMS (( bfd *, struct bfd_link_info *, bfd *, asection *,
  40           bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *,
  41           asection **));
  42 static boolean mn10200_elf_relax_section
  43   PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
  44 static bfd_byte * mn10200_elf_get_relocated_section_contents
  45   PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
  46            bfd_byte *, boolean, asymbol **));
  47
  48 enum reloc_type {
  49   R_MN10200_NONE = 0,
  50   R_MN10200_32,
  51   R_MN10200_16,
  52   R_MN10200_8,
  53   R_MN10200_24,
  54   R_MN10200_PCREL8,
  55   R_MN10200_PCREL16,
  56   R_MN10200_PCREL24,
  57   R_MN10200_MAX
  58 };
  59
  60 static reloc_howto_type elf_mn10200_howto_table[] = {
  61   /* Dummy relocation.  Does nothing.  */
  62   HOWTO (R_MN10200_NONE,
  63          0,
  64          2,
  65          16,
  66          false,
  67          0,
  68          complain_overflow_bitfield,
  69          bfd_elf_generic_reloc,
  70          "R_MN10200_NONE",
  71          false,
  72          0,
  73          0,
  74          false),
  75   /* Standard 32 bit reloc.  */
  76   HOWTO (R_MN10200_32,
  77          0,
  78          2,
  79          32,
  80          false,
  81          0,
  82          complain_overflow_bitfield,
  83          bfd_elf_generic_reloc,
  84          "R_MN10200_32",
  85          false,
  86          0xffffffff,
  87          0xffffffff,
  88          false),
  89   /* Standard 16 bit reloc.  */
  90   HOWTO (R_MN10200_16,
  91          0,
  92          1,
  93          16,
  94          false,
  95          0,
  96          complain_overflow_bitfield,
  97          bfd_elf_generic_reloc,
  98          "R_MN10200_16",
  99          false,
 100          0xffff,
 101          0xffff,
 102          false),
 103   /* Standard 8 bit reloc.  */
 104   HOWTO (R_MN10200_8,
 105          0,
 106          0,
 107          8,
 108          false,
 109          0,
 110          complain_overflow_bitfield,
 111          bfd_elf_generic_reloc,
 112          "R_MN10200_8",
 113          false,
 114          0xff,
 115          0xff,
 116          false),
 117   /* Standard 24 bit reloc.  */
 118   HOWTO (R_MN10200_24,
 119          0,
 120          2,
 121          24,
 122          false,
 123          0,
 124          complain_overflow_bitfield,
 125          bfd_elf_generic_reloc,
 126          "R_MN10200_24",
 127          false,
 128          0xffffff,
 129          0xffffff,
 130          false),
 131   /* Simple 8 pc-relative reloc.  */
 132   HOWTO (R_MN10200_PCREL8,
 133          0,
 134          0,
 135          8,
 136          true,
 137          0,
 138          complain_overflow_bitfield,
 139          bfd_elf_generic_reloc,
 140          "R_MN10200_PCREL8",
 141          false,
 142          0xff,
 143          0xff,
 144          true),
 145   /* Simple 16 pc-relative reloc.  */
 146   HOWTO (R_MN10200_PCREL16,
 147          0,
 148          1,
 149          16,
 150          true,
 151          0,
 152          complain_overflow_bitfield,
 153          bfd_elf_generic_reloc,
 154          "R_MN10200_PCREL16",
 155          false,
 156          0xffff,
 157          0xffff,
 158          true),
 159   /* Simple 32bit pc-relative reloc with a 1 byte adjustment
 160      to get the pc-relative offset correct.  */
 161   HOWTO (R_MN10200_PCREL24,
 162          0,
 163          2,
 164          24,
 165          true,
 166          0,
 167          complain_overflow_bitfield,
 168          bfd_elf_generic_reloc,
 169          "R_MN10200_PCREL24",
 170          false,
 171          0xffffff,
 172          0xffffff,
 173          true),
 174 };
 175
 176 struct mn10200_reloc_map {
 177   bfd_reloc_code_real_type bfd_reloc_val;
 178   unsigned char elf_reloc_val;
 179 };
 180
 181 static const struct mn10200_reloc_map mn10200_reloc_map[] = {
 182   { BFD_RELOC_NONE    , R_MN10200_NONE   , },
 183   { BFD_RELOC_32      , R_MN10200_32     , },
 184   { BFD_RELOC_16      , R_MN10200_16     , },
 185   { BFD_RELOC_8       , R_MN10200_8      , },
 186   { BFD_RELOC_24      , R_MN10200_24     , },
 187   { BFD_RELOC_8_PCREL , R_MN10200_PCREL8 , },
 188   { BFD_RELOC_16_PCREL, R_MN10200_PCREL16, },
 189   { BFD_RELOC_24_PCREL, R_MN10200_PCREL24, },
 190 };
 191
 192 static reloc_howto_type *
 193 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
 194      bfd *abfd ATTRIBUTE_UNUSED;
 195      bfd_reloc_code_real_type code;
 196 {
 197   unsigned int i;
 198
 199   for (i = 0;
 200        i < sizeof (mn10200_reloc_map) / sizeof (struct mn10200_reloc_map);
 201        i++)
 202     {
 203       if (mn10200_reloc_map[i].bfd_reloc_val == code)
 204         return &elf_mn10200_howto_table[mn10200_reloc_map[i].elf_reloc_val];
 205     }
 206
 207   return NULL;
 208 }
 209
 210 /* Set the howto pointer for an MN10200 ELF reloc.  */
 211
 212 static void
 213 mn10200_info_to_howto (abfd, cache_ptr, dst)
 214      bfd *abfd ATTRIBUTE_UNUSED;
 215      arelent *cache_ptr;
 216      Elf_Internal_Rela *dst;
 217 {
 218   unsigned int r_type;
 219
 220   r_type = ELF32_R_TYPE (dst->r_info);
 221   BFD_ASSERT (r_type < (unsigned int) R_MN10200_MAX);
 222   cache_ptr->howto = &elf_mn10200_howto_table[r_type];
 223 }
 224
 225 /* Perform a relocation as part of a final link.  */
 226
 227 static bfd_reloc_status_type
 228 mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd,
 229                                  input_section, contents, offset, value,
 230                                  addend, info, sym_sec, is_local)
 231      reloc_howto_type *howto;
 232      bfd *input_bfd;
 233      bfd *output_bfd ATTRIBUTE_UNUSED;
 234      asection *input_section;
 235      bfd_byte *contents;
 236      bfd_vma offset;
 237      bfd_vma value;
 238      bfd_vma addend;
 239      struct bfd_link_info *info ATTRIBUTE_UNUSED;
 240      asection *sym_sec ATTRIBUTE_UNUSED;
 241      int is_local ATTRIBUTE_UNUSED;
 242 {
 243   unsigned long r_type = howto->type;
 244   bfd_byte *hit_data = contents + offset;
 245
 246   switch (r_type)
 247     {
 248
 249     case R_MN10200_NONE:
 250       return bfd_reloc_ok;
 251
 252     case R_MN10200_32:
 253       value += addend;
 254       bfd_put_32 (input_bfd, value, hit_data);
 255       return bfd_reloc_ok;
 256
 257     case R_MN10200_16:
 258       value += addend;
 259
 260       if ((long) value > 0x7fff || (long) value < -0x8000)
 261         return bfd_reloc_overflow;
 262
 263       bfd_put_16 (input_bfd, value, hit_data);
 264       return bfd_reloc_ok;
 265
 266     case R_MN10200_8:
 267       value += addend;
 268
 269       if ((long) value > 0x7f || (long) value < -0x80)
 270         return bfd_reloc_overflow;
 271
 272       bfd_put_8 (input_bfd, value, hit_data);
 273       return bfd_reloc_ok;
 274
 275     case R_MN10200_24:
 276       value += addend;
 277
 278       if ((long) value > 0x7fffff || (long) value < -0x800000)
 279         return bfd_reloc_overflow;
 280
 281       value &= 0xffffff;
 282       value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
 283       bfd_put_32 (input_bfd, value, hit_data);
 284       return bfd_reloc_ok;
 285
 286     case R_MN10200_PCREL8:
 287       value -= (input_section->output_section->vma
 288                 + input_section->output_offset);
 289       value -= (offset + 1);
 290       value += addend;
 291
 292       if ((long) value > 0xff || (long) value < -0x100)
 293         return bfd_reloc_overflow;
 294
 295       bfd_put_8 (input_bfd, value, hit_data);
 296       return bfd_reloc_ok;
 297
 298     case R_MN10200_PCREL16:
 299       value -= (input_section->output_section->vma
 300                 + input_section->output_offset);
 301       value -= (offset + 2);
 302       value += addend;
 303
 304       if ((long) value > 0xffff || (long) value < -0x10000)
 305         return bfd_reloc_overflow;
 306
 307       bfd_put_16 (input_bfd, value, hit_data);
 308       return bfd_reloc_ok;
 309
 310     case R_MN10200_PCREL24:
 311       value -= (input_section->output_section->vma
 312                 + input_section->output_offset);
 313       value -= (offset + 3);
 314       value += addend;
 315
 316       if ((long) value > 0xffffff || (long) value < -0x1000000)
 317         return bfd_reloc_overflow;
 318
 319       value &= 0xffffff;
 320       value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
 321       bfd_put_32 (input_bfd, value, hit_data);
 322       return bfd_reloc_ok;
 323
 324     default:
 325       return bfd_reloc_notsupported;
 326     }
 327 }
 328 \f
 329 /* Relocate an MN10200 ELF section.  */
 330 static boolean
 331 mn10200_elf_relocate_section (output_bfd, info, input_bfd, input_section,
 332                               contents, relocs, local_syms, local_sections)
 333      bfd *output_bfd;
 334      struct bfd_link_info *info;
 335      bfd *input_bfd;
 336      asection *input_section;
 337      bfd_byte *contents;
 338      Elf_Internal_Rela *relocs;
 339      Elf_Internal_Sym *local_syms;
 340      asection **local_sections;
 341 {
 342   Elf_Internal_Shdr *symtab_hdr;
 343   struct elf_link_hash_entry **sym_hashes;
 344   Elf_Internal_Rela *rel, *relend;
 345
 346   if (info->relocateable)
 347     return true;
 348
 349   symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
 350   sym_hashes = elf_sym_hashes (input_bfd);
 351
 352   rel = relocs;
 353   relend = relocs + input_section->reloc_count;
 354   for (; rel < relend; rel++)
 355     {
 356       int r_type;
 357       reloc_howto_type *howto;
 358       unsigned long r_symndx;
 359       Elf_Internal_Sym *sym;
 360       asection *sec;
 361       struct elf_link_hash_entry *h;
 362       bfd_vma relocation;
 363       bfd_reloc_status_type r;
 364
 365       r_symndx = ELF32_R_SYM (rel->r_info);
 366       r_type = ELF32_R_TYPE (rel->r_info);
 367       howto = elf_mn10200_howto_table + r_type;
 368
 369       h = NULL;
 370       sym = NULL;
 371       sec = NULL;
 372       if (r_symndx < symtab_hdr->sh_info)
 373         {
 374           sym = local_syms + r_symndx;
 375           sec = local_sections[r_symndx];
 376           relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
 377         }
 378       else
 379         {
 380           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
 381           while (h->root.type == bfd_link_hash_indirect
 382                  || h->root.type == bfd_link_hash_warning)
 383             h = (struct elf_link_hash_entry *) h->root.u.i.link;
 384           if (h->root.type == bfd_link_hash_defined
 385               || h->root.type == bfd_link_hash_defweak)
 386             {
 387               sec = h->root.u.def.section;
 388               relocation = (h->root.u.def.value
 389                             + sec->output_section->vma
 390                             + sec->output_offset);
 391             }
 392           else if (h->root.type == bfd_link_hash_undefweak)
 393             relocation = 0;
 394           else
 395             {
 396               if (! ((*info->callbacks->undefined_symbol)
 397                      (info, h->root.root.string, input_bfd,
 398                       input_section, rel->r_offset, true)))
 399                 return false;
 400               relocation = 0;
 401             }
 402         }
 403
 404       r = mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd,
 405                                            input_section,
 406                                            contents, rel->r_offset,
 407                                            relocation, rel->r_addend,
 408                                            info, sec, h == NULL);
 409
 410       if (r != bfd_reloc_ok)
 411         {
 412           const char *name;
 413           const char *msg = (const char *) 0;
 414
 415           if (h != NULL)
 416             name = h->root.root.string;
 417           else
 418             {
 419               name = (bfd_elf_string_from_elf_section
 420                       (input_bfd, symtab_hdr->sh_link, sym->st_name));
 421               if (name == NULL || *name == '\0')
 422                 name = bfd_section_name (input_bfd, sec);
 423             }
 424
 425           switch (r)
 426             {
 427             case bfd_reloc_overflow:
 428               if (! ((*info->callbacks->reloc_overflow)
 429                      (info, name, howto->name, (bfd_vma) 0,
 430                       input_bfd, input_section, rel->r_offset)))
 431                 return false;
 432               break;
 433
 434             case bfd_reloc_undefined:
 435               if (! ((*info->callbacks->undefined_symbol)
 436                      (info, name, input_bfd, input_section,
 437                       rel->r_offset, true)))
 438                 return false;
 439               break;
 440
 441             case bfd_reloc_outofrange:
 442               msg = _("internal error: out of range error");
 443               goto common_error;
 444
 445             case bfd_reloc_notsupported:
 446               msg = _("internal error: unsupported relocation error");
 447               goto common_error;
 448
 449             case bfd_reloc_dangerous:
 450               msg = _("internal error: dangerous error");
 451               goto common_error;
 452
 453             default:
 454               msg = _("internal error: unknown error");
 455               /* fall through */
 456
 457             common_error:
 458               if (!((*info->callbacks->warning)
 459                     (info, msg, name, input_bfd, input_section,
 460                      rel->r_offset)))
 461                 return false;
 462               break;
 463             }
 464         }
 465     }
 466
 467   return true;
 468 }
 469
 470 /* This function handles relaxing for the mn10200.
 471
 472    There's quite a few relaxing opportunites available on the mn10200:
 473
 474         * jsr:24 -> jsr:16                                         2 bytes
 475
 476         * jmp:24 -> jmp:16                                         2 bytes
 477         * jmp:16 -> bra:8                                          1 byte
 478
 479                 * If the previous instruction is a conditional branch
 480                 around the jump/bra, we may be able to reverse its condition
 481                 and change its target to the jump's target.  The jump/bra
 482                 can then be deleted.                               2 bytes
 483
 484         * mov abs24 -> mov abs16        2 byte savings
 485
 486         * Most instructions which accept imm24 can relax to imm16  2 bytes
 487         - Most instructions which accept imm16 can relax to imm8   1 byte
 488
 489         * Most instructions which accept d24 can relax to d16      2 bytes
 490         - Most instructions which accept d16 can relax to d8       1 byte
 491
 492         abs24, imm24, d24 all look the same at the reloc level.  It
 493         might make the code simpler if we had different relocs for
 494         the various relaxable operand types.
 495
 496         We don't handle imm16->imm8 or d16->d8 as they're very rare
 497         and somewhat more difficult to support.  */
 498
 499 static boolean
 500 mn10200_elf_relax_section (abfd, sec, link_info, again)
 501      bfd *abfd;
 502      asection *sec;
 503      struct bfd_link_info *link_info;
 504      boolean *again;
 505 {
 506   Elf_Internal_Shdr *symtab_hdr;
 507   Elf_Internal_Rela *internal_relocs;
 508   Elf_Internal_Rela *irel, *irelend;
 509   bfd_byte *contents = NULL;
 510   Elf_Internal_Sym *isymbuf = NULL;
 511
 512   /* Assume nothing changes.  */
 513   *again = false;
 514
 515   /* We don't have to do anything for a relocateable link, if
 516      this section does not have relocs, or if this is not a
 517      code section.  */
 518   if (link_info->relocateable
 519       || (sec->flags & SEC_RELOC) == 0
 520       || sec->reloc_count == 0
 521       || (sec->flags & SEC_CODE) == 0)
 522     return true;
 523
 524   /* If this is the first time we have been called for this section,
 525      initialize the cooked size.  */
 526   if (sec->_cooked_size == 0)
 527     sec->_cooked_size = sec->_raw_size;
 528
 529   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
 530
 531   /* Get a copy of the native relocations.  */
 532   internal_relocs = (_bfd_elf32_link_read_relocs
 533                      (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
 534                       link_info->keep_memory));
 535   if (internal_relocs == NULL)
 536     goto error_return;
 537
 538   /* Walk through them looking for relaxing opportunities.  */
 539   irelend = internal_relocs + sec->reloc_count;
 540   for (irel = internal_relocs; irel < irelend; irel++)
 541     {
 542       bfd_vma symval;
 543
 544       /* If this isn't something that can be relaxed, then ignore
 545          this reloc.  */
 546       if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_NONE
 547           || ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_8
 548           || ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_MAX)
 549         continue;
 550
 551       /* Get the section contents if we haven't done so already.  */
 552       if (contents == NULL)
 553         {
 554           /* Get cached copy if it exists.  */
 555           if (elf_section_data (sec)->this_hdr.contents != NULL)
 556             contents = elf_section_data (sec)->this_hdr.contents;
 557           else
 558             {
 559               /* Go get them off disk.  */
 560               contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
 561               if (contents == NULL)
 562                 goto error_return;
 563
 564               if (! bfd_get_section_contents (abfd, sec, contents,
 565                                               (file_ptr) 0, sec->_raw_size))
 566                 goto error_return;
 567             }
 568         }
 569
 570       /* Read this BFD's local symbols if we haven't done so already.  */
 571       if (isymbuf == NULL && symtab_hdr->sh_info != 0)
 572         {
 573           isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
 574           if (isymbuf == NULL)
 575             isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
 576                                             symtab_hdr->sh_info, 0,
 577                                             NULL, NULL, NULL);
 578           if (isymbuf == NULL)
 579             goto error_return;
 580         }
 581
 582       /* Get the value of the symbol referred to by the reloc.  */
 583       if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
 584         {
 585           /* A local symbol.  */
 586           Elf_Internal_Sym *isym;
 587           asection *sym_sec;
 588
 589           isym = isymbuf + ELF32_R_SYM (irel->r_info);
 590           if (isym->st_shndx == SHN_UNDEF)
 591             sym_sec = bfd_und_section_ptr;
 592           else if (isym->st_shndx == SHN_ABS)
 593             sym_sec = bfd_abs_section_ptr;
 594           else if (isym->st_shndx == SHN_COMMON)
 595             sym_sec = bfd_com_section_ptr;
 596           else
 597             sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
 598           symval = (isym->st_value
 599                     + sym_sec->output_section->vma
 600                     + sym_sec->output_offset);
 601         }
 602       else
 603         {
 604           unsigned long indx;
 605           struct elf_link_hash_entry *h;
 606
 607           /* An external symbol.  */
 608           indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
 609           h = elf_sym_hashes (abfd)[indx];
 610           BFD_ASSERT (h != NULL);
 611           if (h->root.type != bfd_link_hash_defined
 612               && h->root.type != bfd_link_hash_defweak)
 613             {
 614               /* This appears to be a reference to an undefined
 615                  symbol.  Just ignore it--it will be caught by the
 616                  regular reloc processing.  */
 617               continue;
 618             }
 619
 620           symval = (h->root.u.def.value
 621                     + h->root.u.def.section->output_section->vma
 622                     + h->root.u.def.section->output_offset);
 623         }
 624
 625       /* For simplicity of coding, we are going to modify the section
 626          contents, the section relocs, and the BFD symbol table.  We
 627          must tell the rest of the code not to free up this
 628          information.  It would be possible to instead create a table
 629          of changes which have to be made, as is done in coff-mips.c;
 630          that would be more work, but would require less memory when
 631          the linker is run.  */
 632
 633       /* Try to turn a 24bit pc-relative branch/call into a 16bit pc-relative
 634          branch/call.  */
 635       if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL24)
 636         {
 637           bfd_vma value = symval;
 638
 639           /* Deal with pc-relative gunk.  */
 640           value -= (sec->output_section->vma + sec->output_offset);
 641           value -= (irel->r_offset + 3);
 642           value += irel->r_addend;
 643
 644           /* See if the value will fit in 16 bits, note the high value is
 645              0x7fff + 2 as the target will be two bytes closer if we are
 646              able to relax.  */
 647           if ((long) value < 0x8001 && (long) value > -0x8000)
 648             {
 649               unsigned char code;
 650
 651               /* Get the opcode.  */
 652               code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
 653
 654               if (code != 0xe0 && code != 0xe1)
 655                 continue;
 656
 657               /* Note that we've changed the relocs, section contents, etc.  */
 658               elf_section_data (sec)->relocs = internal_relocs;
 659               elf_section_data (sec)->this_hdr.contents = contents;
 660               symtab_hdr->contents = (unsigned char *) isymbuf;
 661
 662               /* Fix the opcode.  */
 663               if (code == 0xe0)
 664                 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 2);
 665               else if (code == 0xe1)
 666                 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 2);
 667
 668               /* Fix the relocation's type.  */
 669               irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
 670                                            R_MN10200_PCREL16);
 671
 672               /* The opcode got shorter too, so we have to fix the offset.  */
 673               irel->r_offset -= 1;
 674
 675               /* Delete two bytes of data.  */
 676               if (!mn10200_elf_relax_delete_bytes (abfd, sec,
 677                                                    irel->r_offset + 1, 2))
 678                 goto error_return;
 679
 680               /* That will change things, so, we should relax again.
 681                  Note that this is not required, and it may be slow.  */
 682               *again = true;
 683             }
 684         }
 685
 686       /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
 687          branch.  */
 688       if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL16)
 689         {
 690           bfd_vma value = symval;
 691
 692           /* Deal with pc-relative gunk.  */
 693           value -= (sec->output_section->vma + sec->output_offset);
 694           value -= (irel->r_offset + 2);
 695           value += irel->r_addend;
 696
 697           /* See if the value will fit in 8 bits, note the high value is
 698              0x7f + 1 as the target will be one bytes closer if we are
 699              able to relax.  */
 700           if ((long) value < 0x80 && (long) value > -0x80)
 701             {
 702               unsigned char code;
 703
 704               /* Get the opcode.  */
 705               code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
 706
 707               if (code != 0xfc)
 708                 continue;
 709
 710               /* Note that we've changed the relocs, section contents, etc.  */
 711               elf_section_data (sec)->relocs = internal_relocs;
 712               elf_section_data (sec)->this_hdr.contents = contents;
 713               symtab_hdr->contents = (unsigned char *) isymbuf;
 714
 715               /* Fix the opcode.  */
 716               bfd_put_8 (abfd, 0xea, contents + irel->r_offset - 1);
 717
 718               /* Fix the relocation's type.  */
 719               irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
 720                                            R_MN10200_PCREL8);
 721
 722               /* Delete one byte of data.  */
 723               if (!mn10200_elf_relax_delete_bytes (abfd, sec,
 724                                                    irel->r_offset + 1, 1))
 725                 goto error_return;
 726
 727               /* That will change things, so, we should relax again.
 728                  Note that this is not required, and it may be slow.  */
 729               *again = true;
 730             }
 731         }
 732
 733       /* Try to eliminate an unconditional 8 bit pc-relative branch
 734          which immediately follows a conditional 8 bit pc-relative
 735          branch around the unconditional branch.
 736
 737             original:           new:
 738             bCC lab1            bCC' lab2
 739             bra lab2
 740            lab1:               lab1:
 741
 742          This happens when the bCC can't reach lab2 at assembly time,
 743          but due to other relaxations it can reach at link time.  */
 744       if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL8)
 745         {
 746           Elf_Internal_Rela *nrel;
 747           bfd_vma value = symval;
 748           unsigned char code;
 749
 750           /* Deal with pc-relative gunk.  */
 751           value -= (sec->output_section->vma + sec->output_offset);
 752           value -= (irel->r_offset + 1);
 753           value += irel->r_addend;
 754
 755           /* Do nothing if this reloc is the last byte in the section.  */
 756           if (irel->r_offset == sec->_cooked_size)
 757             continue;
 758
 759           /* See if the next instruction is an unconditional pc-relative
 760              branch, more often than not this test will fail, so we
 761              test it first to speed things up.  */
 762           code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
 763           if (code != 0xea)
 764             continue;
 765
 766           /* Also make sure the next relocation applies to the next
 767              instruction and that it's a pc-relative 8 bit branch.  */
 768           nrel = irel + 1;
 769           if (nrel == irelend
 770               || irel->r_offset + 2 != nrel->r_offset
 771               || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10200_PCREL8)
 772             continue;
 773
 774           /* Make sure our destination immediately follows the
 775              unconditional branch.  */
 776           if (symval != (sec->output_section->vma + sec->output_offset
 777                          + irel->r_offset + 3))
 778             continue;
 779
 780           /* Now make sure we are a conditional branch.  This may not
 781              be necessary, but why take the chance.
 782
 783              Note these checks assume that R_MN10200_PCREL8 relocs
 784              only occur on bCC and bCCx insns.  If they occured
 785              elsewhere, we'd need to know the start of this insn
 786              for this check to be accurate.  */
 787           code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
 788           if (code != 0xe0 && code != 0xe1 && code != 0xe2
 789               && code != 0xe3 && code != 0xe4 && code != 0xe5
 790               && code != 0xe6 && code != 0xe7 && code != 0xe8
 791               && code != 0xe9 && code != 0xec && code != 0xed
 792               && code != 0xee && code != 0xef && code != 0xfc
 793               && code != 0xfd && code != 0xfe && code != 0xff)
 794             continue;
 795
 796           /* We also have to be sure there is no symbol/label
 797              at the unconditional branch.  */
 798           if (mn10200_elf_symbol_address_p (abfd, sec, isymbuf,
 799                                             irel->r_offset + 1))
 800             continue;
 801
 802           /* Note that we've changed the relocs, section contents, etc.  */
 803           elf_section_data (sec)->relocs = internal_relocs;
 804           elf_section_data (sec)->this_hdr.contents = contents;
 805           symtab_hdr->contents = (unsigned char *) isymbuf;
 806
 807           /* Reverse the condition of the first branch.  */
 808           switch (code)
 809             {
 810             case 0xfc:
 811               code = 0xfd;
 812               break;
 813             case 0xfd:
 814               code = 0xfc;
 815               break;
 816             case 0xfe:
 817               code = 0xff;
 818               break;
 819             case 0xff:
 820               code = 0xfe;
 821               break;
 822             case 0xe8:
 823               code = 0xe9;
 824               break;
 825             case 0xe9:
 826               code = 0xe8;
 827               break;
 828             case 0xe0:
 829               code = 0xe2;
 830               break;
 831             case 0xe2:
 832               code = 0xe0;
 833               break;
 834             case 0xe3:
 835               code = 0xe1;
 836               break;
 837             case 0xe1:
 838               code = 0xe3;
 839               break;
 840             case 0xe4:
 841               code = 0xe6;
 842               break;
 843             case 0xe6:
 844               code = 0xe4;
 845               break;
 846             case 0xe7:
 847               code = 0xe5;
 848               break;
 849             case 0xe5:
 850               code = 0xe7;
 851               break;
 852             case 0xec:
 853               code = 0xed;
 854               break;
 855             case 0xed:
 856               code = 0xec;
 857               break;
 858             case 0xee:
 859               code = 0xef;
 860               break;
 861             case 0xef:
 862               code = 0xee;
 863               break;
 864             }
 865           bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
 866
 867           /* Set the reloc type and symbol for the first branch
 868              from the second branch.  */
 869           irel->r_info = nrel->r_info;
 870
 871           /* Make the reloc for the second branch a null reloc.  */
 872           nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
 873                                        R_MN10200_NONE);
 874
 875           /* Delete two bytes of data.  */
 876           if (!mn10200_elf_relax_delete_bytes (abfd, sec,
 877                                                irel->r_offset + 1, 2))
 878             goto error_return;
 879
 880           /* That will change things, so, we should relax again.
 881              Note that this is not required, and it may be slow.  */
 882           *again = true;
 883         }
 884
 885       /* Try to turn a 24bit immediate, displacement or absolute address
 886          into a 16bit immediate, displacement or absolute address.  */
 887       if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_24)
 888         {
 889           bfd_vma value = symval;
 890
 891           /* See if the value will fit in 16 bits.
 892              We allow any 16bit match here.  We prune those we can't
 893              handle below.  */
 894           if ((long) value < 0x7fff && (long) value > -0x8000)
 895             {
 896               unsigned char code;
 897
 898               /* All insns which have 24bit operands are 5 bytes long,
 899                  the first byte will always be 0xf4, but we double check
 900                  it just in case.  */
 901
 902               /* Get the first opcode.  */
 903               code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
 904
 905               if (code != 0xf4)
 906                 continue;
 907
 908               /* Get the second opcode.  */
 909               code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
 910
 911               switch (code & 0xfc)
 912                 {
 913                 /* mov imm24,dn -> mov imm16,dn */
 914                 case 0x70:
 915                   /* Not safe if the high bit is on as relaxing may
 916                      move the value out of high mem and thus not fit
 917                      in a signed 16bit value.  */
 918                   if (value & 0x8000)
 919                     continue;
 920
 921                   /* Note that we've changed the reldection contents, etc.  */
 922                   elf_section_data (sec)->relocs = internal_relocs;
 923                   elf_section_data (sec)->this_hdr.contents = contents;
 924                   symtab_hdr->contents = (unsigned char *) isymbuf;
 925
 926                   /* Fix the opcode.  */
 927                   bfd_put_8 (abfd, 0xf8 + (code & 0x03),
 928                              contents + irel->r_offset - 2);
 929
 930                   /* Fix the relocation's type.  */
 931                   irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
 932                                                R_MN10200_16);
 933
 934                   /* The opcode got shorter too, so we have to fix the
 935                      offset.  */
 936                   irel->r_offset -= 1;
 937
 938                   /* Delete two bytes of data.  */
 939                   if (!mn10200_elf_relax_delete_bytes (abfd, sec,
 940                                                        irel->r_offset + 1, 2))
 941                     goto error_return;
 942
 943                   /* That will change things, so, we should relax again.
 944                      Note that this is not required, and it may be slow.  */
 945                   *again = true;
 946                   break;
 947
 948                 /* mov imm24,an -> mov imm16,an
 949                    cmp imm24,an -> cmp imm16,an
 950                    mov (abs24),dn -> mov (abs16),dn
 951                    mov dn,(abs24) -> mov dn,(abs16)
 952                    movb dn,(abs24) -> movb dn,(abs16)
 953                    movbu (abs24),dn -> movbu (abs16),dn */
 954                 case 0x74:
 955                 case 0x7c:
 956                 case 0xc0:
 957                 case 0x40:
 958                 case 0x44:
 959                 case 0xc8:
 960                   /* Note that we've changed the reldection contents, etc.  */
 961                   elf_section_data (sec)->relocs = internal_relocs;
 962                   elf_section_data (sec)->this_hdr.contents = contents;
 963                   symtab_hdr->contents = (unsigned char *) isymbuf;
 964
 965                   if ((code & 0xfc) == 0x74)
 966                     code = 0xdc + (code & 0x03);
 967                   else if ((code & 0xfc) == 0x7c)
 968                     code = 0xec + (code & 0x03);
 969                   else if ((code & 0xfc) == 0xc0)
 970                     code = 0xc8 + (code & 0x03);
 971                   else if ((code & 0xfc) == 0x40)
 972                     code = 0xc0 + (code & 0x03);
 973                   else if ((code & 0xfc) == 0x44)
 974                     code = 0xc4 + (code & 0x03);
 975                   else if ((code & 0xfc) == 0xc8)
 976                     code = 0xcc + (code & 0x03);
 977
 978                   /* Fix the opcode.  */
 979                   bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
 980
 981                   /* Fix the relocation's type.  */
 982                   irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
 983                                                R_MN10200_16);
 984
 985                   /* The opcode got shorter too, so we have to fix the
 986                      offset.  */
 987                   irel->r_offset -= 1;
 988
 989                   /* Delete two bytes of data.  */
 990                   if (!mn10200_elf_relax_delete_bytes (abfd, sec,
 991                                                        irel->r_offset + 1, 2))
 992                     goto error_return;
 993
 994                   /* That will change things, so, we should relax again.
 995                      Note that this is not required, and it may be slow.  */
 996                   *again = true;
 997                   break;
 998
 999                 /* cmp imm24,dn -> cmp imm16,dn
1000                    mov (abs24),an -> mov (abs16),an
1001                    mov an,(abs24) -> mov an,(abs16)
1002                    add imm24,dn -> add imm16,dn
1003                    add imm24,an -> add imm16,an
1004                    sub imm24,dn -> sub imm16,dn
1005                    sub imm24,an -> sub imm16,an
1006                    And all d24->d16 in memory ops.  */
1007                 case 0x78:
1008                 case 0xd0:
1009                 case 0x50:
1010                 case 0x60:
1011                 case 0x64:
1012                 case 0x68:
1013                 case 0x6c:
1014                 case 0x80:
1015                 case 0xf0:
1016                 case 0x00:
1017                 case 0x10:
1018                 case 0xb0:
1019                 case 0x30:
1020                 case 0xa0:
1021                 case 0x20:
1022                 case 0x90:
1023                   /* Not safe if the high bit is on as relaxing may
1024                      move the value out of high mem and thus not fit
1025                      in a signed 16bit value.  */
1026                   if (((code & 0xfc) == 0x78
1027                        || (code & 0xfc) == 0x60
1028                        || (code & 0xfc) == 0x64
1029                        || (code & 0xfc) == 0x68
1030                        || (code & 0xfc) == 0x6c
1031                        || (code & 0xfc) == 0x80
1032                        || (code & 0xfc) == 0xf0
1033                        || (code & 0xfc) == 0x00
1034                        || (code & 0xfc) == 0x10
1035                        || (code & 0xfc) == 0xb0
1036                        || (code & 0xfc) == 0x30
1037                        || (code & 0xfc) == 0xa0
1038                        || (code & 0xfc) == 0x20
1039                        || (code & 0xfc) == 0x90)
1040                       && (value & 0x8000) != 0)
1041                     continue;
1042
1043                   /* Note that we've changed the reldection contents, etc.  */
1044                   elf_section_data (sec)->relocs = internal_relocs;
1045                   elf_section_data (sec)->this_hdr.contents = contents;
1046                   symtab_hdr->contents = (unsigned char *) isymbuf;
1047
1048                   /* Fix the opcode.  */
1049                   bfd_put_8 (abfd, 0xf7, contents + irel->r_offset - 2);
1050
1051                   if ((code & 0xfc) == 0x78)
1052                     code = 0x48 + (code & 0x03);
1053                   else if ((code & 0xfc) == 0xd0)
1054                     code = 0x30 + (code & 0x03);
1055                   else if ((code & 0xfc) == 0x50)
1056                     code = 0x20 + (code & 0x03);
1057                   else if ((code & 0xfc) == 0x60)
1058                     code = 0x18 + (code & 0x03);
1059                   else if ((code & 0xfc) == 0x64)
1060                     code = 0x08 + (code & 0x03);
1061                   else if ((code & 0xfc) == 0x68)
1062                     code = 0x1c + (code & 0x03);
1063                   else if ((code & 0xfc) == 0x6c)
1064                     code = 0x0c + (code & 0x03);
1065                   else if ((code & 0xfc) == 0x80)
1066                     code = 0xc0 + (code & 0x07);
1067                   else if ((code & 0xfc) == 0xf0)
1068                     code = 0xb0 + (code & 0x07);
1069                   else if ((code & 0xfc) == 0x00)
1070                     code = 0x80 + (code & 0x07);
1071                   else if ((code & 0xfc) == 0x10)
1072                     code = 0xa0 + (code & 0x07);
1073                   else if ((code & 0xfc) == 0xb0)
1074                     code = 0x70 + (code & 0x07);
1075                   else if ((code & 0xfc) == 0x30)
1076                     code = 0x60 + (code & 0x07);
1077                   else if ((code & 0xfc) == 0xa0)
1078                     code = 0xd0 + (code & 0x07);
1079                   else if ((code & 0xfc) == 0x20)
1080                     code = 0x90 + (code & 0x07);
1081                   else if ((code & 0xfc) == 0x90)
1082                     code = 0x50 + (code & 0x07);
1083
1084                   bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
1085
1086                   /* Fix the relocation's type.  */
1087                   irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1088                                                R_MN10200_16);
1089
1090                   /* Delete one bytes of data.  */
1091                   if (!mn10200_elf_relax_delete_bytes (abfd, sec,
1092                                                        irel->r_offset + 2, 1))
1093                     goto error_return;
1094
1095                   /* That will change things, so, we should relax again.
1096                      Note that this is not required, and it may be slow.  */
1097                   *again = true;
1098                   break;
1099
1100                 /* movb (abs24),dn ->movbu (abs16),dn extxb bn */
1101                 case 0xc4:
1102                   /* Note that we've changed the reldection contents, etc.  */
1103                   elf_section_data (sec)->relocs = internal_relocs;
1104                   elf_section_data (sec)->this_hdr.contents = contents;
1105                   symtab_hdr->contents = (unsigned char *) isymbuf;
1106
1107                   bfd_put_8 (abfd, 0xcc + (code & 0x03),
1108                              contents + irel->r_offset - 2);
1109
1110                   bfd_put_8 (abfd, 0xb8 + (code & 0x03),
1111                              contents + irel->r_offset - 1);
1112
1113                   /* Fix the relocation's type.  */
1114                   irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1115                                                R_MN10200_16);
1116
1117                   /* The reloc will be applied one byte in front of its
1118                      current location.  */
1119                   irel->r_offset -= 1;
1120
1121                   /* Delete one bytes of data.  */
1122                   if (!mn10200_elf_relax_delete_bytes (abfd, sec,
1123                                                        irel->r_offset + 2, 1))
1124                     goto error_return;
1125
1126                   /* That will change things, so, we should relax again.
1127                      Note that this is not required, and it may be slow.  */
1128                   *again = true;
1129                   break;
1130                 }
1131             }
1132         }
1133     }
1134
1135   if (isymbuf != NULL
1136       && symtab_hdr->contents != (unsigned char *) isymbuf)
1137     {
1138       if (! link_info->keep_memory)
1139         free (isymbuf);
1140       else
1141         {
1142           /* Cache the symbols for elf_link_input_bfd.  */
1143           symtab_hdr->contents = (unsigned char *) isymbuf;
1144         }
1145     }
1146
1147   if (contents != NULL
1148       && elf_section_data (sec)->this_hdr.contents != contents)
1149     {
1150       if (! link_info->keep_memory)
1151         free (contents);
1152       else
1153         {
1154           /* Cache the section contents for elf_link_input_bfd.  */
1155           elf_section_data (sec)->this_hdr.contents = contents;
1156         }
1157     }
1158
1159   if (internal_relocs != NULL
1160       && elf_section_data (sec)->relocs != internal_relocs)
1161     free (internal_relocs);
1162
1163   return true;
1164
1165  error_return:
1166   if (isymbuf != NULL
1167       && symtab_hdr->contents != (unsigned char *) isymbuf)
1168     free (isymbuf);
1169   if (contents != NULL
1170       && elf_section_data (sec)->this_hdr.contents != contents)
1171     free (contents);
1172   if (internal_relocs != NULL
1173       && elf_section_data (sec)->relocs != internal_relocs)
1174     free (internal_relocs);
1175
1176   return false;
1177 }
1178
1179 /* Delete some bytes from a section while relaxing.  */
1180
1181 static boolean
1182 mn10200_elf_relax_delete_bytes (abfd, sec, addr, count)
1183      bfd *abfd;
1184      asection *sec;
1185      bfd_vma addr;
1186      int count;
1187 {
1188   Elf_Internal_Shdr *symtab_hdr;
1189   unsigned int sec_shndx;
1190   bfd_byte *contents;
1191   Elf_Internal_Rela *irel, *irelend;
1192   Elf_Internal_Rela *irelalign;
1193   bfd_vma toaddr;
1194   Elf_Internal_Sym *isym;
1195   Elf_Internal_Sym *isymend;
1196   struct elf_link_hash_entry **sym_hashes;
1197   struct elf_link_hash_entry **end_hashes;
1198   unsigned int symcount;
1199
1200   sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1201
1202   contents = elf_section_data (sec)->this_hdr.contents;
1203
1204   /* The deletion must stop at the next ALIGN reloc for an aligment
1205      power larger than the number of bytes we are deleting.  */
1206
1207   irelalign = NULL;
1208   toaddr = sec->_cooked_size;
1209
1210   irel = elf_section_data (sec)->relocs;
1211   irelend = irel + sec->reloc_count;
1212
1213   /* Actually delete the bytes.  */
1214   memmove (contents + addr, contents + addr + count,
1215            (size_t) (toaddr - addr - count));
1216   sec->_cooked_size -= count;
1217
1218   /* Adjust all the relocs.  */
1219   for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1220     {
1221       /* Get the new reloc address.  */
1222       if ((irel->r_offset > addr
1223            && irel->r_offset < toaddr))
1224         irel->r_offset -= count;
1225     }
1226
1227   /* Adjust the local symbols defined in this section.  */
1228   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1229   isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1230   for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1231     {
1232       if (isym->st_shndx == sec_shndx
1233           && isym->st_value > addr
1234           && isym->st_value < toaddr)
1235         isym->st_value -= count;
1236     }
1237
1238   /* Now adjust the global symbols defined in this section.  */
1239   symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1240               - symtab_hdr->sh_info);
1241   sym_hashes = elf_sym_hashes (abfd);
1242   end_hashes = sym_hashes + symcount;
1243   for (; sym_hashes < end_hashes; sym_hashes++)
1244     {
1245       struct elf_link_hash_entry *sym_hash = *sym_hashes;
1246       if ((sym_hash->root.type == bfd_link_hash_defined
1247            || sym_hash->root.type == bfd_link_hash_defweak)
1248           && sym_hash->root.u.def.section == sec
1249           && sym_hash->root.u.def.value > addr
1250           && sym_hash->root.u.def.value < toaddr)
1251         {
1252           sym_hash->root.u.def.value -= count;
1253         }
1254     }
1255
1256   return true;
1257 }
1258
1259 /* Return true if a symbol exists at the given address, else return
1260    false.  */
1261 static boolean
1262 mn10200_elf_symbol_address_p (abfd, sec, isym, addr)
1263      bfd *abfd;
1264      asection *sec;
1265      Elf_Internal_Sym *isym;
1266      bfd_vma addr;
1267 {
1268   Elf_Internal_Shdr *symtab_hdr;
1269   unsigned int sec_shndx;
1270   Elf_Internal_Sym *isymend;
1271   struct elf_link_hash_entry **sym_hashes;
1272   struct elf_link_hash_entry **end_hashes;
1273   unsigned int symcount;
1274
1275   sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1276
1277   /* Examine all the local symbols.  */
1278   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1279   for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1280     {
1281       if (isym->st_shndx == sec_shndx
1282           && isym->st_value == addr)
1283         return true;
1284     }
1285
1286   symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1287               - symtab_hdr->sh_info);
1288   sym_hashes = elf_sym_hashes (abfd);
1289   end_hashes = sym_hashes + symcount;
1290   for (; sym_hashes < end_hashes; sym_hashes++)
1291     {
1292       struct elf_link_hash_entry *sym_hash = *sym_hashes;
1293       if ((sym_hash->root.type == bfd_link_hash_defined
1294            || sym_hash->root.type == bfd_link_hash_defweak)
1295           && sym_hash->root.u.def.section == sec
1296           && sym_hash->root.u.def.value == addr)
1297         return true;
1298     }
1299
1300   return false;
1301 }
1302
1303 /* This is a version of bfd_generic_get_relocated_section_contents
1304    which uses mn10200_elf_relocate_section.  */
1305
1306 static bfd_byte *
1307 mn10200_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
1308                                             data, relocateable, symbols)
1309      bfd *output_bfd;
1310      struct bfd_link_info *link_info;
1311      struct bfd_link_order *link_order;
1312      bfd_byte *data;
1313      boolean relocateable;
1314      asymbol **symbols;
1315 {
1316   Elf_Internal_Shdr *symtab_hdr;
1317   asection *input_section = link_order->u.indirect.section;
1318   bfd *input_bfd = input_section->owner;
1319   asection **sections = NULL;
1320   Elf_Internal_Rela *internal_relocs = NULL;
1321   Elf_Internal_Sym *isymbuf = NULL;
1322
1323   /* We only need to handle the case of relaxing, or of having a
1324      particular set of section contents, specially.  */
1325   if (relocateable
1326       || elf_section_data (input_section)->this_hdr.contents == NULL)
1327     return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
1328                                                        link_order, data,
1329                                                        relocateable,
1330                                                        symbols);
1331
1332   symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1333
1334   memcpy (data, elf_section_data (input_section)->this_hdr.contents,
1335           (size_t) input_section->_raw_size);
1336
1337   if ((input_section->flags & SEC_RELOC) != 0
1338       && input_section->reloc_count > 0)
1339     {
1340       Elf_Internal_Sym *isym;
1341       Elf_Internal_Sym *isymend;
1342       asection **secpp;
1343       bfd_size_type amt;
1344
1345       internal_relocs = (_bfd_elf32_link_read_relocs
1346                          (input_bfd, input_section, (PTR) NULL,
1347                           (Elf_Internal_Rela *) NULL, false));
1348       if (internal_relocs == NULL)
1349         goto error_return;
1350
1351       if (symtab_hdr->sh_info != 0)
1352         {
1353           isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1354           if (isymbuf == NULL)
1355             isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1356                                             symtab_hdr->sh_info, 0,
1357                                             NULL, NULL, NULL);
1358           if (isymbuf == NULL)
1359             goto error_return;
1360         }
1361
1362       amt = symtab_hdr->sh_info;
1363       amt *= sizeof (asection *);
1364       sections = (asection **) bfd_malloc (amt);
1365       if (sections == NULL && amt != 0)
1366         goto error_return;
1367
1368       isymend = isymbuf + symtab_hdr->sh_info;
1369       for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
1370         {
1371           asection *isec;
1372
1373           if (isym->st_shndx == SHN_UNDEF)
1374             isec = bfd_und_section_ptr;
1375           else if (isym->st_shndx == SHN_ABS)
1376             isec = bfd_abs_section_ptr;
1377           else if (isym->st_shndx == SHN_COMMON)
1378             isec = bfd_com_section_ptr;
1379           else
1380             isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
1381
1382           *secpp = isec;
1383         }
1384
1385       if (! mn10200_elf_relocate_section (output_bfd, link_info, input_bfd,
1386                                      input_section, data, internal_relocs,
1387                                      isymbuf, sections))
1388         goto error_return;
1389
1390       if (sections != NULL)
1391         free (sections);
1392       if (isymbuf != NULL
1393           && symtab_hdr->contents != (unsigned char *) isymbuf)
1394         free (isymbuf);
1395       if (elf_section_data (input_section)->relocs != internal_relocs)
1396         free (internal_relocs);
1397     }
1398
1399   return data;
1400
1401  error_return:
1402   if (sections != NULL)
1403     free (sections);
1404   if (isymbuf != NULL
1405       && symtab_hdr->contents != (unsigned char *) isymbuf)
1406     free (isymbuf);
1407   if (internal_relocs != NULL
1408       && elf_section_data (input_section)->relocs != internal_relocs)
1409     free (internal_relocs);
1410   return NULL;
1411 }
1412
1413 #define TARGET_LITTLE_SYM       bfd_elf32_mn10200_vec
1414 #define TARGET_LITTLE_NAME      "elf32-mn10200"
1415 #define ELF_ARCH                bfd_arch_mn10200
1416 #define ELF_MACHINE_CODE        EM_MN10200
1417 #define ELF_MACHINE_ALT1        EM_CYGNUS_MN10200
1418 #define ELF_MAXPAGESIZE         0x1000
1419
1420 #define elf_backend_rela_normal 1
1421 #define elf_info_to_howto       mn10200_info_to_howto
1422 #define elf_info_to_howto_rel   0
1423 #define elf_backend_relocate_section mn10200_elf_relocate_section
1424 #define bfd_elf32_bfd_relax_section     mn10200_elf_relax_section
1425 #define bfd_elf32_bfd_get_relocated_section_contents \
1426                                 mn10200_elf_get_relocated_section_contents
1427
1428 #define elf_symbol_leading_char '_'
1429
1430 #include "elf32-target.h"