bfd/elf32-i386.c

   1 /* Intel 80386/80486-specific support for 32-bit ELF
   2    Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   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 "bfdlink.h"
  24 #include "libbfd.h"
  25 #include "elf-bfd.h"
  26
  27 /* 386 uses REL relocations instead of RELA.  */
  28 #define USE_REL 1
  29
  30 #include "elf/i386.h"
  31
  32 static reloc_howto_type elf_howto_table[]=
  33 {
  34   HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
  35         bfd_elf_generic_reloc, "R_386_NONE",
  36         TRUE, 0x00000000, 0x00000000, FALSE),
  37   HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  38         bfd_elf_generic_reloc, "R_386_32",
  39         TRUE, 0xffffffff, 0xffffffff, FALSE),
  40   HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  41         bfd_elf_generic_reloc, "R_386_PC32",
  42         TRUE, 0xffffffff, 0xffffffff, TRUE),
  43   HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  44         bfd_elf_generic_reloc, "R_386_GOT32",
  45         TRUE, 0xffffffff, 0xffffffff, FALSE),
  46   HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  47         bfd_elf_generic_reloc, "R_386_PLT32",
  48         TRUE, 0xffffffff, 0xffffffff, TRUE),
  49   HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  50         bfd_elf_generic_reloc, "R_386_COPY",
  51         TRUE, 0xffffffff, 0xffffffff, FALSE),
  52   HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  53         bfd_elf_generic_reloc, "R_386_GLOB_DAT",
  54         TRUE, 0xffffffff, 0xffffffff, FALSE),
  55   HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  56         bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
  57         TRUE, 0xffffffff, 0xffffffff, FALSE),
  58   HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  59         bfd_elf_generic_reloc, "R_386_RELATIVE",
  60         TRUE, 0xffffffff, 0xffffffff, FALSE),
  61   HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  62         bfd_elf_generic_reloc, "R_386_GOTOFF",
  63         TRUE, 0xffffffff, 0xffffffff, FALSE),
  64   HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  65         bfd_elf_generic_reloc, "R_386_GOTPC",
  66         TRUE, 0xffffffff, 0xffffffff, TRUE),
  67
  68   /* We have a gap in the reloc numbers here.
  69      R_386_standard counts the number up to this point, and
  70      R_386_ext_offset is the value to subtract from a reloc type of
  71      R_386_16 thru R_386_PC8 to form an index into this table.  */
  72 #define R_386_standard (R_386_GOTPC + 1)
  73 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
  74
  75   /* These relocs are a GNU extension.  */
  76   HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  77         bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
  78         TRUE, 0xffffffff, 0xffffffff, FALSE),
  79   HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  80         bfd_elf_generic_reloc, "R_386_TLS_IE",
  81         TRUE, 0xffffffff, 0xffffffff, FALSE),
  82   HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  83         bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
  84         TRUE, 0xffffffff, 0xffffffff, FALSE),
  85   HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  86         bfd_elf_generic_reloc, "R_386_TLS_LE",
  87         TRUE, 0xffffffff, 0xffffffff, FALSE),
  88   HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  89         bfd_elf_generic_reloc, "R_386_TLS_GD",
  90         TRUE, 0xffffffff, 0xffffffff, FALSE),
  91   HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  92         bfd_elf_generic_reloc, "R_386_TLS_LDM",
  93         TRUE, 0xffffffff, 0xffffffff, FALSE),
  94   HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
  95         bfd_elf_generic_reloc, "R_386_16",
  96         TRUE, 0xffff, 0xffff, FALSE),
  97   HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
  98         bfd_elf_generic_reloc, "R_386_PC16",
  99         TRUE, 0xffff, 0xffff, TRUE),
 100   HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
 101         bfd_elf_generic_reloc, "R_386_8",
 102         TRUE, 0xff, 0xff, FALSE),
 103   HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
 104         bfd_elf_generic_reloc, "R_386_PC8",
 105         TRUE, 0xff, 0xff, TRUE),
 106
 107 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
 108 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
 109   /* These are common with Solaris TLS implementation.  */
 110   HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 111         bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
 112         TRUE, 0xffffffff, 0xffffffff, FALSE),
 113   HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 114         bfd_elf_generic_reloc, "R_386_TLS_IE_32",
 115         TRUE, 0xffffffff, 0xffffffff, FALSE),
 116   HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 117         bfd_elf_generic_reloc, "R_386_TLS_LE_32",
 118         TRUE, 0xffffffff, 0xffffffff, FALSE),
 119   HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 120         bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
 121         TRUE, 0xffffffff, 0xffffffff, FALSE),
 122   HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 123         bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
 124         TRUE, 0xffffffff, 0xffffffff, FALSE),
 125   HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 126         bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
 127         TRUE, 0xffffffff, 0xffffffff, FALSE),
 128
 129   /* Another gap.  */
 130 #define R_386_tls (R_386_TLS_TPOFF32 + 1 - R_386_tls_offset)
 131 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
 132
 133 /* GNU extension to record C++ vtable hierarchy.  */
 134   HOWTO (R_386_GNU_VTINHERIT,   /* type */
 135          0,                     /* rightshift */
 136          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 137          0,                     /* bitsize */
 138          FALSE,                 /* pc_relative */
 139          0,                     /* bitpos */
 140          complain_overflow_dont, /* complain_on_overflow */
 141          NULL,                  /* special_function */
 142          "R_386_GNU_VTINHERIT", /* name */
 143          FALSE,                 /* partial_inplace */
 144          0,                     /* src_mask */
 145          0,                     /* dst_mask */
 146          FALSE),                /* pcrel_offset */
 147
 148 /* GNU extension to record C++ vtable member usage.  */
 149   HOWTO (R_386_GNU_VTENTRY,     /* type */
 150          0,                     /* rightshift */
 151          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 152          0,                     /* bitsize */
 153          FALSE,                 /* pc_relative */
 154          0,                     /* bitpos */
 155          complain_overflow_dont, /* complain_on_overflow */
 156          _bfd_elf_rel_vtable_reloc_fn, /* special_function */
 157          "R_386_GNU_VTENTRY",   /* name */
 158          FALSE,                 /* partial_inplace */
 159          0,                     /* src_mask */
 160          0,                     /* dst_mask */
 161          FALSE)                 /* pcrel_offset */
 162
 163 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
 164
 165 };
 166
 167 #ifdef DEBUG_GEN_RELOC
 168 #define TRACE(str) \
 169   fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
 170 #else
 171 #define TRACE(str)
 172 #endif
 173
 174 static reloc_howto_type *
 175 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 176                             bfd_reloc_code_real_type code)
 177 {
 178   switch (code)
 179     {
 180     case BFD_RELOC_NONE:
 181       TRACE ("BFD_RELOC_NONE");
 182       return &elf_howto_table[R_386_NONE];
 183
 184     case BFD_RELOC_32:
 185       TRACE ("BFD_RELOC_32");
 186       return &elf_howto_table[R_386_32];
 187
 188     case BFD_RELOC_CTOR:
 189       TRACE ("BFD_RELOC_CTOR");
 190       return &elf_howto_table[R_386_32];
 191
 192     case BFD_RELOC_32_PCREL:
 193       TRACE ("BFD_RELOC_PC32");
 194       return &elf_howto_table[R_386_PC32];
 195
 196     case BFD_RELOC_386_GOT32:
 197       TRACE ("BFD_RELOC_386_GOT32");
 198       return &elf_howto_table[R_386_GOT32];
 199
 200     case BFD_RELOC_386_PLT32:
 201       TRACE ("BFD_RELOC_386_PLT32");
 202       return &elf_howto_table[R_386_PLT32];
 203
 204     case BFD_RELOC_386_COPY:
 205       TRACE ("BFD_RELOC_386_COPY");
 206       return &elf_howto_table[R_386_COPY];
 207
 208     case BFD_RELOC_386_GLOB_DAT:
 209       TRACE ("BFD_RELOC_386_GLOB_DAT");
 210       return &elf_howto_table[R_386_GLOB_DAT];
 211
 212     case BFD_RELOC_386_JUMP_SLOT:
 213       TRACE ("BFD_RELOC_386_JUMP_SLOT");
 214       return &elf_howto_table[R_386_JUMP_SLOT];
 215
 216     case BFD_RELOC_386_RELATIVE:
 217       TRACE ("BFD_RELOC_386_RELATIVE");
 218       return &elf_howto_table[R_386_RELATIVE];
 219
 220     case BFD_RELOC_386_GOTOFF:
 221       TRACE ("BFD_RELOC_386_GOTOFF");
 222       return &elf_howto_table[R_386_GOTOFF];
 223
 224     case BFD_RELOC_386_GOTPC:
 225       TRACE ("BFD_RELOC_386_GOTPC");
 226       return &elf_howto_table[R_386_GOTPC];
 227
 228       /* These relocs are a GNU extension.  */
 229     case BFD_RELOC_386_TLS_TPOFF:
 230       TRACE ("BFD_RELOC_386_TLS_TPOFF");
 231       return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
 232
 233     case BFD_RELOC_386_TLS_IE:
 234       TRACE ("BFD_RELOC_386_TLS_IE");
 235       return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
 236
 237     case BFD_RELOC_386_TLS_GOTIE:
 238       TRACE ("BFD_RELOC_386_TLS_GOTIE");
 239       return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
 240
 241     case BFD_RELOC_386_TLS_LE:
 242       TRACE ("BFD_RELOC_386_TLS_LE");
 243       return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
 244
 245     case BFD_RELOC_386_TLS_GD:
 246       TRACE ("BFD_RELOC_386_TLS_GD");
 247       return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
 248
 249     case BFD_RELOC_386_TLS_LDM:
 250       TRACE ("BFD_RELOC_386_TLS_LDM");
 251       return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
 252
 253     case BFD_RELOC_16:
 254       TRACE ("BFD_RELOC_16");
 255       return &elf_howto_table[R_386_16 - R_386_ext_offset];
 256
 257     case BFD_RELOC_16_PCREL:
 258       TRACE ("BFD_RELOC_16_PCREL");
 259       return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
 260
 261     case BFD_RELOC_8:
 262       TRACE ("BFD_RELOC_8");
 263       return &elf_howto_table[R_386_8 - R_386_ext_offset];
 264
 265     case BFD_RELOC_8_PCREL:
 266       TRACE ("BFD_RELOC_8_PCREL");
 267       return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
 268
 269     /* Common with Sun TLS implementation.  */
 270     case BFD_RELOC_386_TLS_LDO_32:
 271       TRACE ("BFD_RELOC_386_TLS_LDO_32");
 272       return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
 273
 274     case BFD_RELOC_386_TLS_IE_32:
 275       TRACE ("BFD_RELOC_386_TLS_IE_32");
 276       return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
 277
 278     case BFD_RELOC_386_TLS_LE_32:
 279       TRACE ("BFD_RELOC_386_TLS_LE_32");
 280       return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
 281
 282     case BFD_RELOC_386_TLS_DTPMOD32:
 283       TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
 284       return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
 285
 286     case BFD_RELOC_386_TLS_DTPOFF32:
 287       TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
 288       return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
 289
 290     case BFD_RELOC_386_TLS_TPOFF32:
 291       TRACE ("BFD_RELOC_386_TLS_TPOFF32");
 292       return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
 293
 294     case BFD_RELOC_VTABLE_INHERIT:
 295       TRACE ("BFD_RELOC_VTABLE_INHERIT");
 296       return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
 297
 298     case BFD_RELOC_VTABLE_ENTRY:
 299       TRACE ("BFD_RELOC_VTABLE_ENTRY");
 300       return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
 301
 302     default:
 303       break;
 304     }
 305
 306   TRACE ("Unknown");
 307   return 0;
 308 }
 309
 310 static void
 311 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
 312                             arelent *cache_ptr,
 313                             Elf_Internal_Rela *dst)
 314 {
 315   unsigned int r_type = ELF32_R_TYPE (dst->r_info);
 316   unsigned int indx;
 317
 318   if ((indx = r_type) >= R_386_standard
 319       && ((indx = r_type - R_386_ext_offset) - R_386_standard
 320           >= R_386_ext - R_386_standard)
 321       && ((indx = r_type - R_386_tls_offset) - R_386_ext
 322           >= R_386_tls - R_386_ext)
 323       && ((indx = r_type - R_386_vt_offset) - R_386_tls
 324           >= R_386_vt - R_386_tls))
 325     {
 326       (*_bfd_error_handler) (_("%s: invalid relocation type %d"),
 327                              bfd_archive_filename (abfd), (int) r_type);
 328       indx = R_386_NONE;
 329     }
 330   cache_ptr->howto = &elf_howto_table[indx];
 331 }
 332
 333 /* Return whether a symbol name implies a local label.  The UnixWare
 334    2.1 cc generates temporary symbols that start with .X, so we
 335    recognize them here.  FIXME: do other SVR4 compilers also use .X?.
 336    If so, we should move the .X recognition into
 337    _bfd_elf_is_local_label_name.  */
 338
 339 static bfd_boolean
 340 elf_i386_is_local_label_name (bfd *abfd, const char *name)
 341 {
 342   if (name[0] == '.' && name[1] == 'X')
 343     return TRUE;
 344
 345   return _bfd_elf_is_local_label_name (abfd, name);
 346 }
 347 \f
 348 /* Support for core dump NOTE sections.  */
 349 static bfd_boolean
 350 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
 351 {
 352   int offset;
 353   size_t raw_size;
 354
 355   switch (note->descsz)
 356     {
 357       default:
 358         return FALSE;
 359
 360       case 144:         /* Linux/i386 */
 361         /* pr_cursig */
 362         elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
 363
 364         /* pr_pid */
 365         elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
 366
 367         /* pr_reg */
 368         offset = 72;
 369         raw_size = 68;
 370
 371         break;
 372     }
 373
 374   /* Make a ".reg/999" section.  */
 375   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
 376                                           raw_size, note->descpos + offset);
 377 }
 378
 379 static bfd_boolean
 380 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
 381 {
 382   switch (note->descsz)
 383     {
 384       default:
 385         return FALSE;
 386
 387       case 124:         /* Linux/i386 elf_prpsinfo */
 388         elf_tdata (abfd)->core_program
 389           = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 390         elf_tdata (abfd)->core_command
 391           = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 392     }
 393
 394   /* Note that for some reason, a spurious space is tacked
 395      onto the end of the args in some (at least one anyway)
 396      implementations, so strip it off if it exists.  */
 397
 398   {
 399     char *command = elf_tdata (abfd)->core_command;
 400     int n = strlen (command);
 401
 402     if (0 < n && command[n - 1] == ' ')
 403       command[n - 1] = '\0';
 404   }
 405
 406   return TRUE;
 407 }
 408 \f
 409 /* Functions for the i386 ELF linker.
 410
 411    In order to gain some understanding of code in this file without
 412    knowing all the intricate details of the linker, note the
 413    following:
 414
 415    Functions named elf_i386_* are called by external routines, other
 416    functions are only called locally.  elf_i386_* functions appear
 417    in this file more or less in the order in which they are called
 418    from external routines.  eg. elf_i386_check_relocs is called
 419    early in the link process, elf_i386_finish_dynamic_sections is
 420    one of the last functions.  */
 421
 422
 423 /* The name of the dynamic interpreter.  This is put in the .interp
 424    section.  */
 425
 426 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
 427
 428 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
 429    copying dynamic variables from a shared lib into an app's dynbss
 430    section, and instead use a dynamic relocation to point into the
 431    shared lib.  */
 432 #define ELIMINATE_COPY_RELOCS 1
 433
 434 /* The size in bytes of an entry in the procedure linkage table.  */
 435
 436 #define PLT_ENTRY_SIZE 16
 437
 438 /* The first entry in an absolute procedure linkage table looks like
 439    this.  See the SVR4 ABI i386 supplement to see how this works.  */
 440
 441 static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] =
 442 {
 443   0xff, 0x35,   /* pushl contents of address */
 444   0, 0, 0, 0,   /* replaced with address of .got + 4.  */
 445   0xff, 0x25,   /* jmp indirect */
 446   0, 0, 0, 0,   /* replaced with address of .got + 8.  */
 447   0, 0, 0, 0    /* pad out to 16 bytes.  */
 448 };
 449
 450 /* Subsequent entries in an absolute procedure linkage table look like
 451    this.  */
 452
 453 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
 454 {
 455   0xff, 0x25,   /* jmp indirect */
 456   0, 0, 0, 0,   /* replaced with address of this symbol in .got.  */
 457   0x68,         /* pushl immediate */
 458   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 459   0xe9,         /* jmp relative */
 460   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 461 };
 462
 463 /* The first entry in a PIC procedure linkage table look like this.  */
 464
 465 static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] =
 466 {
 467   0xff, 0xb3, 4, 0, 0, 0,       /* pushl 4(%ebx) */
 468   0xff, 0xa3, 8, 0, 0, 0,       /* jmp *8(%ebx) */
 469   0, 0, 0, 0                    /* pad out to 16 bytes.  */
 470 };
 471
 472 /* Subsequent entries in a PIC procedure linkage table look like this.  */
 473
 474 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
 475 {
 476   0xff, 0xa3,   /* jmp *offset(%ebx) */
 477   0, 0, 0, 0,   /* replaced with offset of this symbol in .got.  */
 478   0x68,         /* pushl immediate */
 479   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 480   0xe9,         /* jmp relative */
 481   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 482 };
 483
 484 /* The i386 linker needs to keep track of the number of relocs that it
 485    decides to copy as dynamic relocs in check_relocs for each symbol.
 486    This is so that it can later discard them if they are found to be
 487    unnecessary.  We store the information in a field extending the
 488    regular ELF linker hash table.  */
 489
 490 struct elf_i386_dyn_relocs
 491 {
 492   struct elf_i386_dyn_relocs *next;
 493
 494   /* The input section of the reloc.  */
 495   asection *sec;
 496
 497   /* Total number of relocs copied for the input section.  */
 498   bfd_size_type count;
 499
 500   /* Number of pc-relative relocs copied for the input section.  */
 501   bfd_size_type pc_count;
 502 };
 503
 504 /* i386 ELF linker hash entry.  */
 505
 506 struct elf_i386_link_hash_entry
 507 {
 508   struct elf_link_hash_entry elf;
 509
 510   /* Track dynamic relocs copied for this symbol.  */
 511   struct elf_i386_dyn_relocs *dyn_relocs;
 512
 513 #define GOT_UNKNOWN     0
 514 #define GOT_NORMAL      1
 515 #define GOT_TLS_GD      2
 516 #define GOT_TLS_IE      4
 517 #define GOT_TLS_IE_POS  5
 518 #define GOT_TLS_IE_NEG  6
 519 #define GOT_TLS_IE_BOTH 7
 520   unsigned char tls_type;
 521 };
 522
 523 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
 524
 525 struct elf_i386_obj_tdata
 526 {
 527   struct elf_obj_tdata root;
 528
 529   /* tls_type for each local got entry.  */
 530   char *local_got_tls_type;
 531 };
 532
 533 #define elf_i386_tdata(abfd) \
 534   ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
 535
 536 #define elf_i386_local_got_tls_type(abfd) \
 537   (elf_i386_tdata (abfd)->local_got_tls_type)
 538
 539 static bfd_boolean
 540 elf_i386_mkobject (bfd *abfd)
 541 {
 542   bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
 543   abfd->tdata.any = bfd_zalloc (abfd, amt);
 544   if (abfd->tdata.any == NULL)
 545     return FALSE;
 546   return TRUE;
 547 }
 548
 549 /* i386 ELF linker hash table.  */
 550
 551 struct elf_i386_link_hash_table
 552 {
 553   struct elf_link_hash_table elf;
 554
 555   /* Short-cuts to get to dynamic linker sections.  */
 556   asection *sgot;
 557   asection *sgotplt;
 558   asection *srelgot;
 559   asection *splt;
 560   asection *srelplt;
 561   asection *sdynbss;
 562   asection *srelbss;
 563
 564   union {
 565     bfd_signed_vma refcount;
 566     bfd_vma offset;
 567   } tls_ldm_got;
 568
 569   /* Small local sym to section mapping cache.  */
 570   struct sym_sec_cache sym_sec;
 571 };
 572
 573 /* Get the i386 ELF linker hash table from a link_info structure.  */
 574
 575 #define elf_i386_hash_table(p) \
 576   ((struct elf_i386_link_hash_table *) ((p)->hash))
 577
 578 /* Create an entry in an i386 ELF linker hash table.  */
 579
 580 static struct bfd_hash_entry *
 581 link_hash_newfunc (struct bfd_hash_entry *entry,
 582                    struct bfd_hash_table *table,
 583                    const char *string)
 584 {
 585   /* Allocate the structure if it has not already been allocated by a
 586      subclass.  */
 587   if (entry == NULL)
 588     {
 589       entry = bfd_hash_allocate (table,
 590                                  sizeof (struct elf_i386_link_hash_entry));
 591       if (entry == NULL)
 592         return entry;
 593     }
 594
 595   /* Call the allocation method of the superclass.  */
 596   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 597   if (entry != NULL)
 598     {
 599       struct elf_i386_link_hash_entry *eh;
 600
 601       eh = (struct elf_i386_link_hash_entry *) entry;
 602       eh->dyn_relocs = NULL;
 603       eh->tls_type = GOT_UNKNOWN;
 604     }
 605
 606   return entry;
 607 }
 608
 609 /* Create an i386 ELF linker hash table.  */
 610
 611 static struct bfd_link_hash_table *
 612 elf_i386_link_hash_table_create (bfd *abfd)
 613 {
 614   struct elf_i386_link_hash_table *ret;
 615   bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
 616
 617   ret = bfd_malloc (amt);
 618   if (ret == NULL)
 619     return NULL;
 620
 621   if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
 622     {
 623       free (ret);
 624       return NULL;
 625     }
 626
 627   ret->sgot = NULL;
 628   ret->sgotplt = NULL;
 629   ret->srelgot = NULL;
 630   ret->splt = NULL;
 631   ret->srelplt = NULL;
 632   ret->sdynbss = NULL;
 633   ret->srelbss = NULL;
 634   ret->tls_ldm_got.refcount = 0;
 635   ret->sym_sec.abfd = NULL;
 636
 637   return &ret->elf.root;
 638 }
 639
 640 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
 641    shortcuts to them in our hash table.  */
 642
 643 static bfd_boolean
 644 create_got_section (bfd *dynobj, struct bfd_link_info *info)
 645 {
 646   struct elf_i386_link_hash_table *htab;
 647
 648   if (! _bfd_elf_create_got_section (dynobj, info))
 649     return FALSE;
 650
 651   htab = elf_i386_hash_table (info);
 652   htab->sgot = bfd_get_section_by_name (dynobj, ".got");
 653   htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
 654   if (!htab->sgot || !htab->sgotplt)
 655     abort ();
 656
 657   htab->srelgot = bfd_make_section (dynobj, ".rel.got");
 658   if (htab->srelgot == NULL
 659       || ! bfd_set_section_flags (dynobj, htab->srelgot,
 660                                   (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
 661                                    | SEC_IN_MEMORY | SEC_LINKER_CREATED
 662                                    | SEC_READONLY))
 663       || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
 664     return FALSE;
 665   return TRUE;
 666 }
 667
 668 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
 669    .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
 670    hash table.  */
 671
 672 static bfd_boolean
 673 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
 674 {
 675   struct elf_i386_link_hash_table *htab;
 676
 677   htab = elf_i386_hash_table (info);
 678   if (!htab->sgot && !create_got_section (dynobj, info))
 679     return FALSE;
 680
 681   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 682     return FALSE;
 683
 684   htab->splt = bfd_get_section_by_name (dynobj, ".plt");
 685   htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
 686   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 687   if (!info->shared)
 688     htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
 689
 690   if (!htab->splt || !htab->srelplt || !htab->sdynbss
 691       || (!info->shared && !htab->srelbss))
 692     abort ();
 693
 694   return TRUE;
 695 }
 696
 697 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 698
 699 static void
 700 elf_i386_copy_indirect_symbol (const struct elf_backend_data *bed,
 701                                struct elf_link_hash_entry *dir,
 702                                struct elf_link_hash_entry *ind)
 703 {
 704   struct elf_i386_link_hash_entry *edir, *eind;
 705
 706   edir = (struct elf_i386_link_hash_entry *) dir;
 707   eind = (struct elf_i386_link_hash_entry *) ind;
 708
 709   if (eind->dyn_relocs != NULL)
 710     {
 711       if (edir->dyn_relocs != NULL)
 712         {
 713           struct elf_i386_dyn_relocs **pp;
 714           struct elf_i386_dyn_relocs *p;
 715
 716           if (ind->root.type == bfd_link_hash_indirect)
 717             abort ();
 718
 719           /* Add reloc counts against the weak sym to the strong sym
 720              list.  Merge any entries against the same section.  */
 721           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 722             {
 723               struct elf_i386_dyn_relocs *q;
 724
 725               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 726                 if (q->sec == p->sec)
 727                   {
 728                     q->pc_count += p->pc_count;
 729                     q->count += p->count;
 730                     *pp = p->next;
 731                     break;
 732                   }
 733               if (q == NULL)
 734                 pp = &p->next;
 735             }
 736           *pp = edir->dyn_relocs;
 737         }
 738
 739       edir->dyn_relocs = eind->dyn_relocs;
 740       eind->dyn_relocs = NULL;
 741     }
 742
 743   if (ind->root.type == bfd_link_hash_indirect
 744       && dir->got.refcount <= 0)
 745     {
 746       edir->tls_type = eind->tls_type;
 747       eind->tls_type = GOT_UNKNOWN;
 748     }
 749
 750   if (ELIMINATE_COPY_RELOCS
 751       && ind->root.type != bfd_link_hash_indirect
 752       && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
 753     /* If called to transfer flags for a weakdef during processing
 754        of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
 755        We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 756     dir->elf_link_hash_flags |=
 757       (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
 758                                    | ELF_LINK_HASH_REF_REGULAR
 759                                    | ELF_LINK_HASH_REF_REGULAR_NONWEAK
 760                                    | ELF_LINK_HASH_NEEDS_PLT
 761                                    | ELF_LINK_POINTER_EQUALITY_NEEDED));
 762   else
 763     _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
 764 }
 765
 766 static int
 767 elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
 768 {
 769   if (info->shared)
 770     return r_type;
 771
 772   switch (r_type)
 773     {
 774     case R_386_TLS_GD:
 775     case R_386_TLS_IE_32:
 776       if (is_local)
 777         return R_386_TLS_LE_32;
 778       return R_386_TLS_IE_32;
 779     case R_386_TLS_IE:
 780     case R_386_TLS_GOTIE:
 781       if (is_local)
 782         return R_386_TLS_LE_32;
 783       return r_type;
 784     case R_386_TLS_LDM:
 785       return R_386_TLS_LE_32;
 786     }
 787
 788   return r_type;
 789 }
 790
 791 /* Look through the relocs for a section during the first phase, and
 792    calculate needed space in the global offset table, procedure linkage
 793    table, and dynamic reloc sections.  */
 794
 795 static bfd_boolean
 796 elf_i386_check_relocs (bfd *abfd,
 797                        struct bfd_link_info *info,
 798                        asection *sec,
 799                        const Elf_Internal_Rela *relocs)
 800 {
 801   struct elf_i386_link_hash_table *htab;
 802   Elf_Internal_Shdr *symtab_hdr;
 803   struct elf_link_hash_entry **sym_hashes;
 804   const Elf_Internal_Rela *rel;
 805   const Elf_Internal_Rela *rel_end;
 806   asection *sreloc;
 807
 808   if (info->relocatable)
 809     return TRUE;
 810
 811   htab = elf_i386_hash_table (info);
 812   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
 813   sym_hashes = elf_sym_hashes (abfd);
 814
 815   sreloc = NULL;
 816
 817   rel_end = relocs + sec->reloc_count;
 818   for (rel = relocs; rel < rel_end; rel++)
 819     {
 820       unsigned int r_type;
 821       unsigned long r_symndx;
 822       struct elf_link_hash_entry *h;
 823
 824       r_symndx = ELF32_R_SYM (rel->r_info);
 825       r_type = ELF32_R_TYPE (rel->r_info);
 826
 827       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
 828         {
 829           (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
 830                                  bfd_archive_filename (abfd),
 831                                  r_symndx);
 832           return FALSE;
 833         }
 834
 835       if (r_symndx < symtab_hdr->sh_info)
 836         h = NULL;
 837       else
 838         h = sym_hashes[r_symndx - symtab_hdr->sh_info];
 839
 840       r_type = elf_i386_tls_transition (info, r_type, h == NULL);
 841
 842       switch (r_type)
 843         {
 844         case R_386_TLS_LDM:
 845           htab->tls_ldm_got.refcount += 1;
 846           goto create_got;
 847
 848         case R_386_PLT32:
 849           /* This symbol requires a procedure linkage table entry.  We
 850              actually build the entry in adjust_dynamic_symbol,
 851              because this might be a case of linking PIC code which is
 852              never referenced by a dynamic object, in which case we
 853              don't need to generate a procedure linkage table entry
 854              after all.  */
 855
 856           /* If this is a local symbol, we resolve it directly without
 857              creating a procedure linkage table entry.  */
 858           if (h == NULL)
 859             continue;
 860
 861           h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
 862           h->plt.refcount += 1;
 863           break;
 864
 865         case R_386_TLS_IE_32:
 866         case R_386_TLS_IE:
 867         case R_386_TLS_GOTIE:
 868           if (info->shared)
 869             info->flags |= DF_STATIC_TLS;
 870           /* Fall through */
 871
 872         case R_386_GOT32:
 873         case R_386_TLS_GD:
 874           /* This symbol requires a global offset table entry.  */
 875           {
 876             int tls_type, old_tls_type;
 877
 878             switch (r_type)
 879               {
 880               default:
 881               case R_386_GOT32: tls_type = GOT_NORMAL; break;
 882               case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
 883               case R_386_TLS_IE_32:
 884                 if (ELF32_R_TYPE (rel->r_info) == r_type)
 885                   tls_type = GOT_TLS_IE_NEG;
 886                 else
 887                   /* If this is a GD->IE transition, we may use either of
 888                      R_386_TLS_TPOFF and R_386_TLS_TPOFF32.  */
 889                   tls_type = GOT_TLS_IE;
 890                 break;
 891               case R_386_TLS_IE:
 892               case R_386_TLS_GOTIE:
 893                 tls_type = GOT_TLS_IE_POS; break;
 894               }
 895
 896             if (h != NULL)
 897               {
 898                 h->got.refcount += 1;
 899                 old_tls_type = elf_i386_hash_entry(h)->tls_type;
 900               }
 901             else
 902               {
 903                 bfd_signed_vma *local_got_refcounts;
 904
 905                 /* This is a global offset table entry for a local symbol.  */
 906                 local_got_refcounts = elf_local_got_refcounts (abfd);
 907                 if (local_got_refcounts == NULL)
 908                   {
 909                     bfd_size_type size;
 910
 911                     size = symtab_hdr->sh_info;
 912                     size *= (sizeof (bfd_signed_vma) + sizeof(char));
 913                     local_got_refcounts = bfd_zalloc (abfd, size);
 914                     if (local_got_refcounts == NULL)
 915                       return FALSE;
 916                     elf_local_got_refcounts (abfd) = local_got_refcounts;
 917                     elf_i386_local_got_tls_type (abfd)
 918                       = (char *) (local_got_refcounts + symtab_hdr->sh_info);
 919                   }
 920                 local_got_refcounts[r_symndx] += 1;
 921                 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
 922               }
 923
 924             if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
 925               tls_type |= old_tls_type;
 926             /* If a TLS symbol is accessed using IE at least once,
 927                there is no point to use dynamic model for it.  */
 928             else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
 929                      && (old_tls_type != GOT_TLS_GD
 930                          || (tls_type & GOT_TLS_IE) == 0))
 931               {
 932                 if ((old_tls_type & GOT_TLS_IE) && tls_type == GOT_TLS_GD)
 933                   tls_type = old_tls_type;
 934                 else
 935                   {
 936                     (*_bfd_error_handler)
 937                       (_("%s: `%s' accessed both as normal and "
 938                          "thread local symbol"),
 939                        bfd_archive_filename (abfd),
 940                        h ? h->root.root.string : "<local>");
 941                     return FALSE;
 942                   }
 943               }
 944
 945             if (old_tls_type != tls_type)
 946               {
 947                 if (h != NULL)
 948                   elf_i386_hash_entry (h)->tls_type = tls_type;
 949                 else
 950                   elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
 951               }
 952           }
 953           /* Fall through */
 954
 955         case R_386_GOTOFF:
 956         case R_386_GOTPC:
 957         create_got:
 958           if (htab->sgot == NULL)
 959             {
 960               if (htab->elf.dynobj == NULL)
 961                 htab->elf.dynobj = abfd;
 962               if (!create_got_section (htab->elf.dynobj, info))
 963                 return FALSE;
 964             }
 965           if (r_type != R_386_TLS_IE)
 966             break;
 967           /* Fall through */
 968
 969         case R_386_TLS_LE_32:
 970         case R_386_TLS_LE:
 971           if (!info->shared)
 972             break;
 973           info->flags |= DF_STATIC_TLS;
 974           /* Fall through */
 975
 976         case R_386_32:
 977         case R_386_PC32:
 978           if (h != NULL && !info->shared)
 979             {
 980               /* If this reloc is in a read-only section, we might
 981                  need a copy reloc.  We can't check reliably at this
 982                  stage whether the section is read-only, as input
 983                  sections have not yet been mapped to output sections.
 984                  Tentatively set the flag for now, and correct in
 985                  adjust_dynamic_symbol.  */
 986               h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
 987
 988               /* We may need a .plt entry if the function this reloc
 989                  refers to is in a shared lib.  */
 990               h->plt.refcount += 1;
 991               if (r_type != R_386_PC32)
 992                 h->elf_link_hash_flags |= ELF_LINK_POINTER_EQUALITY_NEEDED;
 993             }
 994
 995           /* If we are creating a shared library, and this is a reloc
 996              against a global symbol, or a non PC relative reloc
 997              against a local symbol, then we need to copy the reloc
 998              into the shared library.  However, if we are linking with
 999              -Bsymbolic, we do not need to copy a reloc against a
1000              global symbol which is defined in an object we are
1001              including in the link (i.e., DEF_REGULAR is set).  At
1002              this point we have not seen all the input files, so it is
1003              possible that DEF_REGULAR is not set now but will be set
1004              later (it is never cleared).  In case of a weak definition,
1005              DEF_REGULAR may be cleared later by a strong definition in
1006              a shared library.  We account for that possibility below by
1007              storing information in the relocs_copied field of the hash
1008              table entry.  A similar situation occurs when creating
1009              shared libraries and symbol visibility changes render the
1010              symbol local.
1011
1012              If on the other hand, we are creating an executable, we
1013              may need to keep relocations for symbols satisfied by a
1014              dynamic library if we manage to avoid copy relocs for the
1015              symbol.  */
1016           if ((info->shared
1017                && (sec->flags & SEC_ALLOC) != 0
1018                && (r_type != R_386_PC32
1019                    || (h != NULL
1020                        && (! info->symbolic
1021                            || h->root.type == bfd_link_hash_defweak
1022                            || (h->elf_link_hash_flags
1023                                & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1024               || (ELIMINATE_COPY_RELOCS
1025                   && !info->shared
1026                   && (sec->flags & SEC_ALLOC) != 0
1027                   && h != NULL
1028                   && (h->root.type == bfd_link_hash_defweak
1029                       || (h->elf_link_hash_flags
1030                           & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1031             {
1032               struct elf_i386_dyn_relocs *p;
1033               struct elf_i386_dyn_relocs **head;
1034
1035               /* We must copy these reloc types into the output file.
1036                  Create a reloc section in dynobj and make room for
1037                  this reloc.  */
1038               if (sreloc == NULL)
1039                 {
1040                   const char *name;
1041                   bfd *dynobj;
1042                   unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1043                   unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
1044
1045                   name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1046                   if (name == NULL)
1047                     return FALSE;
1048
1049                   if (strncmp (name, ".rel", 4) != 0
1050                       || strcmp (bfd_get_section_name (abfd, sec),
1051                                  name + 4) != 0)
1052                     {
1053                       (*_bfd_error_handler)
1054                         (_("%s: bad relocation section name `%s\'"),
1055                          bfd_archive_filename (abfd), name);
1056                     }
1057
1058                   if (htab->elf.dynobj == NULL)
1059                     htab->elf.dynobj = abfd;
1060
1061                   dynobj = htab->elf.dynobj;
1062                   sreloc = bfd_get_section_by_name (dynobj, name);
1063                   if (sreloc == NULL)
1064                     {
1065                       flagword flags;
1066
1067                       sreloc = bfd_make_section (dynobj, name);
1068                       flags = (SEC_HAS_CONTENTS | SEC_READONLY
1069                                | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1070                       if ((sec->flags & SEC_ALLOC) != 0)
1071                         flags |= SEC_ALLOC | SEC_LOAD;
1072                       if (sreloc == NULL
1073                           || ! bfd_set_section_flags (dynobj, sreloc, flags)
1074                           || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1075                         return FALSE;
1076                     }
1077                   elf_section_data (sec)->sreloc = sreloc;
1078                 }
1079
1080               /* If this is a global symbol, we count the number of
1081                  relocations we need for this symbol.  */
1082               if (h != NULL)
1083                 {
1084                   head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1085                 }
1086               else
1087                 {
1088                   /* Track dynamic relocs needed for local syms too.
1089                      We really need local syms available to do this
1090                      easily.  Oh well.  */
1091
1092                   asection *s;
1093                   s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1094                                                  sec, r_symndx);
1095                   if (s == NULL)
1096                     return FALSE;
1097
1098                   head = ((struct elf_i386_dyn_relocs **)
1099                           &elf_section_data (s)->local_dynrel);
1100                 }
1101
1102               p = *head;
1103               if (p == NULL || p->sec != sec)
1104                 {
1105                   bfd_size_type amt = sizeof *p;
1106                   p = bfd_alloc (htab->elf.dynobj, amt);
1107                   if (p == NULL)
1108                     return FALSE;
1109                   p->next = *head;
1110                   *head = p;
1111                   p->sec = sec;
1112                   p->count = 0;
1113                   p->pc_count = 0;
1114                 }
1115
1116               p->count += 1;
1117               if (r_type == R_386_PC32)
1118                 p->pc_count += 1;
1119             }
1120           break;
1121
1122           /* This relocation describes the C++ object vtable hierarchy.
1123              Reconstruct it for later use during GC.  */
1124         case R_386_GNU_VTINHERIT:
1125           if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1126             return FALSE;
1127           break;
1128
1129           /* This relocation describes which C++ vtable entries are actually
1130              used.  Record for later use during GC.  */
1131         case R_386_GNU_VTENTRY:
1132           if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1133             return FALSE;
1134           break;
1135
1136         default:
1137           break;
1138         }
1139     }
1140
1141   return TRUE;
1142 }
1143
1144 /* Return the section that should be marked against GC for a given
1145    relocation.  */
1146
1147 static asection *
1148 elf_i386_gc_mark_hook (asection *sec,
1149                        struct bfd_link_info *info ATTRIBUTE_UNUSED,
1150                        Elf_Internal_Rela *rel,
1151                        struct elf_link_hash_entry *h,
1152                        Elf_Internal_Sym *sym)
1153 {
1154   if (h != NULL)
1155     {
1156       switch (ELF32_R_TYPE (rel->r_info))
1157         {
1158         case R_386_GNU_VTINHERIT:
1159         case R_386_GNU_VTENTRY:
1160           break;
1161
1162         default:
1163           switch (h->root.type)
1164             {
1165             case bfd_link_hash_defined:
1166             case bfd_link_hash_defweak:
1167               return h->root.u.def.section;
1168
1169             case bfd_link_hash_common:
1170               return h->root.u.c.p->section;
1171
1172             default:
1173               break;
1174             }
1175         }
1176     }
1177   else
1178     return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1179
1180   return NULL;
1181 }
1182
1183 /* Update the got entry reference counts for the section being removed.  */
1184
1185 static bfd_boolean
1186 elf_i386_gc_sweep_hook (bfd *abfd,
1187                         struct bfd_link_info *info,
1188                         asection *sec,
1189                         const Elf_Internal_Rela *relocs)
1190 {
1191   Elf_Internal_Shdr *symtab_hdr;
1192   struct elf_link_hash_entry **sym_hashes;
1193   bfd_signed_vma *local_got_refcounts;
1194   const Elf_Internal_Rela *rel, *relend;
1195
1196   elf_section_data (sec)->local_dynrel = NULL;
1197
1198   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1199   sym_hashes = elf_sym_hashes (abfd);
1200   local_got_refcounts = elf_local_got_refcounts (abfd);
1201
1202   relend = relocs + sec->reloc_count;
1203   for (rel = relocs; rel < relend; rel++)
1204     {
1205       unsigned long r_symndx;
1206       unsigned int r_type;
1207       struct elf_link_hash_entry *h = NULL;
1208
1209       r_symndx = ELF32_R_SYM (rel->r_info);
1210       if (r_symndx >= symtab_hdr->sh_info)
1211         {
1212           struct elf_i386_link_hash_entry *eh;
1213           struct elf_i386_dyn_relocs **pp;
1214           struct elf_i386_dyn_relocs *p;
1215
1216           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1217           eh = (struct elf_i386_link_hash_entry *) h;
1218
1219           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1220             if (p->sec == sec)
1221               {
1222                 /* Everything must go for SEC.  */
1223                 *pp = p->next;
1224                 break;
1225               }
1226         }
1227
1228       r_type = ELF32_R_TYPE (rel->r_info);
1229       r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1230       switch (r_type)
1231         {
1232         case R_386_TLS_LDM:
1233           if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1234             elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1235           break;
1236
1237         case R_386_TLS_GD:
1238         case R_386_TLS_IE_32:
1239         case R_386_TLS_IE:
1240         case R_386_TLS_GOTIE:
1241         case R_386_GOT32:
1242           if (h != NULL)
1243             {
1244               if (h->got.refcount > 0)
1245                 h->got.refcount -= 1;
1246             }
1247           else if (local_got_refcounts != NULL)
1248             {
1249               if (local_got_refcounts[r_symndx] > 0)
1250                 local_got_refcounts[r_symndx] -= 1;
1251             }
1252           break;
1253
1254         case R_386_32:
1255         case R_386_PC32:
1256           if (info->shared)
1257             break;
1258           /* Fall through */
1259
1260         case R_386_PLT32:
1261           if (h != NULL)
1262             {
1263               if (h->plt.refcount > 0)
1264                 h->plt.refcount -= 1;
1265             }
1266           break;
1267
1268         default:
1269           break;
1270         }
1271     }
1272
1273   return TRUE;
1274 }
1275
1276 /* Adjust a symbol defined by a dynamic object and referenced by a
1277    regular object.  The current definition is in some section of the
1278    dynamic object, but we're not including those sections.  We have to
1279    change the definition to something the rest of the link can
1280    understand.  */
1281
1282 static bfd_boolean
1283 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1284                                 struct elf_link_hash_entry *h)
1285 {
1286   struct elf_i386_link_hash_table *htab;
1287   asection *s;
1288   unsigned int power_of_two;
1289
1290   /* If this is a function, put it in the procedure linkage table.  We
1291      will fill in the contents of the procedure linkage table later,
1292      when we know the address of the .got section.  */
1293   if (h->type == STT_FUNC
1294       || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1295     {
1296       if (h->plt.refcount <= 0
1297           || SYMBOL_CALLS_LOCAL (info, h)
1298           || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1299               && h->root.type == bfd_link_hash_undefweak))
1300         {
1301           /* This case can occur if we saw a PLT32 reloc in an input
1302              file, but the symbol was never referred to by a dynamic
1303              object, or if all references were garbage collected.  In
1304              such a case, we don't actually need to build a procedure
1305              linkage table, and we can just do a PC32 reloc instead.  */
1306           h->plt.offset = (bfd_vma) -1;
1307           h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1308         }
1309
1310       return TRUE;
1311     }
1312   else
1313     /* It's possible that we incorrectly decided a .plt reloc was
1314        needed for an R_386_PC32 reloc to a non-function sym in
1315        check_relocs.  We can't decide accurately between function and
1316        non-function syms in check-relocs;  Objects loaded later in
1317        the link may change h->type.  So fix it now.  */
1318     h->plt.offset = (bfd_vma) -1;
1319
1320   /* If this is a weak symbol, and there is a real definition, the
1321      processor independent code will have arranged for us to see the
1322      real definition first, and we can just use the same value.  */
1323   if (h->weakdef != NULL)
1324     {
1325       BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1326                   || h->weakdef->root.type == bfd_link_hash_defweak);
1327       h->root.u.def.section = h->weakdef->root.u.def.section;
1328       h->root.u.def.value = h->weakdef->root.u.def.value;
1329       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1330         h->elf_link_hash_flags
1331           = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1332              | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
1333       return TRUE;
1334     }
1335
1336   /* This is a reference to a symbol defined by a dynamic object which
1337      is not a function.  */
1338
1339   /* If we are creating a shared library, we must presume that the
1340      only references to the symbol are via the global offset table.
1341      For such cases we need not do anything here; the relocations will
1342      be handled correctly by relocate_section.  */
1343   if (info->shared)
1344     return TRUE;
1345
1346   /* If there are no references to this symbol that do not use the
1347      GOT, we don't need to generate a copy reloc.  */
1348   if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1349     return TRUE;
1350
1351   /* If -z nocopyreloc was given, we won't generate them either.  */
1352   if (info->nocopyreloc)
1353     {
1354       h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1355       return TRUE;
1356     }
1357
1358   if (ELIMINATE_COPY_RELOCS)
1359     {
1360       struct elf_i386_link_hash_entry * eh;
1361       struct elf_i386_dyn_relocs *p;
1362
1363       eh = (struct elf_i386_link_hash_entry *) h;
1364       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1365         {
1366           s = p->sec->output_section;
1367           if (s != NULL && (s->flags & SEC_READONLY) != 0)
1368             break;
1369         }
1370
1371       /* If we didn't find any dynamic relocs in read-only sections, then
1372          we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1373       if (p == NULL)
1374         {
1375           h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1376           return TRUE;
1377         }
1378     }
1379
1380   /* We must allocate the symbol in our .dynbss section, which will
1381      become part of the .bss section of the executable.  There will be
1382      an entry for this symbol in the .dynsym section.  The dynamic
1383      object will contain position independent code, so all references
1384      from the dynamic object to this symbol will go through the global
1385      offset table.  The dynamic linker will use the .dynsym entry to
1386      determine the address it must put in the global offset table, so
1387      both the dynamic object and the regular object will refer to the
1388      same memory location for the variable.  */
1389
1390   htab = elf_i386_hash_table (info);
1391
1392   /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1393      copy the initial value out of the dynamic object and into the
1394      runtime process image.  */
1395   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1396     {
1397       htab->srelbss->_raw_size += sizeof (Elf32_External_Rel);
1398       h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1399     }
1400
1401   /* We need to figure out the alignment required for this symbol.  I
1402      have no idea how ELF linkers handle this.  */
1403   power_of_two = bfd_log2 (h->size);
1404   if (power_of_two > 3)
1405     power_of_two = 3;
1406
1407   /* Apply the required alignment.  */
1408   s = htab->sdynbss;
1409   s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1410   if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1411     {
1412       if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1413         return FALSE;
1414     }
1415
1416   /* Define the symbol as being at this point in the section.  */
1417   h->root.u.def.section = s;
1418   h->root.u.def.value = s->_raw_size;
1419
1420   /* Increment the section size to make room for the symbol.  */
1421   s->_raw_size += h->size;
1422
1423   return TRUE;
1424 }
1425
1426 /* This is the condition under which elf_i386_finish_dynamic_symbol
1427    will be called from elflink.h.  If elflink.h doesn't call our
1428    finish_dynamic_symbol routine, we'll need to do something about
1429    initializing any .plt and .got entries in elf_i386_relocate_section.  */
1430 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1431   ((DYN)                                                                \
1432    && ((SHARED)                                                         \
1433        || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)      \
1434    && ((H)->dynindx != -1                                               \
1435        || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1436
1437 /* Allocate space in .plt, .got and associated reloc sections for
1438    dynamic relocs.  */
1439
1440 static bfd_boolean
1441 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1442 {
1443   struct bfd_link_info *info;
1444   struct elf_i386_link_hash_table *htab;
1445   struct elf_i386_link_hash_entry *eh;
1446   struct elf_i386_dyn_relocs *p;
1447
1448   if (h->root.type == bfd_link_hash_indirect)
1449     return TRUE;
1450
1451   if (h->root.type == bfd_link_hash_warning)
1452     /* When warning symbols are created, they **replace** the "real"
1453        entry in the hash table, thus we never get to see the real
1454        symbol in a hash traversal.  So look at it now.  */
1455     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1456
1457   info = (struct bfd_link_info *) inf;
1458   htab = elf_i386_hash_table (info);
1459
1460   if (htab->elf.dynamic_sections_created
1461       && h->plt.refcount > 0)
1462     {
1463       /* Make sure this symbol is output as a dynamic symbol.
1464          Undefined weak syms won't yet be marked as dynamic.  */
1465       if (h->dynindx == -1
1466           && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1467         {
1468           if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1469             return FALSE;
1470         }
1471
1472       if (info->shared
1473           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1474         {
1475           asection *s = htab->splt;
1476
1477           /* If this is the first .plt entry, make room for the special
1478              first entry.  */
1479           if (s->_raw_size == 0)
1480             s->_raw_size += PLT_ENTRY_SIZE;
1481
1482           h->plt.offset = s->_raw_size;
1483
1484           /* If this symbol is not defined in a regular file, and we are
1485              not generating a shared library, then set the symbol to this
1486              location in the .plt.  This is required to make function
1487              pointers compare as equal between the normal executable and
1488              the shared library.  */
1489           if (! info->shared
1490               && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1491             {
1492               h->root.u.def.section = s;
1493               h->root.u.def.value = h->plt.offset;
1494             }
1495
1496           /* Make room for this entry.  */
1497           s->_raw_size += PLT_ENTRY_SIZE;
1498
1499           /* We also need to make an entry in the .got.plt section, which
1500              will be placed in the .got section by the linker script.  */
1501           htab->sgotplt->_raw_size += 4;
1502
1503           /* We also need to make an entry in the .rel.plt section.  */
1504           htab->srelplt->_raw_size += sizeof (Elf32_External_Rel);
1505         }
1506       else
1507         {
1508           h->plt.offset = (bfd_vma) -1;
1509           h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1510         }
1511     }
1512   else
1513     {
1514       h->plt.offset = (bfd_vma) -1;
1515       h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1516     }
1517
1518   /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1519      make it a R_386_TLS_LE_32 requiring no TLS entry.  */
1520   if (h->got.refcount > 0
1521       && !info->shared
1522       && h->dynindx == -1
1523       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
1524     h->got.offset = (bfd_vma) -1;
1525   else if (h->got.refcount > 0)
1526     {
1527       asection *s;
1528       bfd_boolean dyn;
1529       int tls_type = elf_i386_hash_entry(h)->tls_type;
1530
1531       /* Make sure this symbol is output as a dynamic symbol.
1532          Undefined weak syms won't yet be marked as dynamic.  */
1533       if (h->dynindx == -1
1534           && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1535         {
1536           if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1537             return FALSE;
1538         }
1539
1540       s = htab->sgot;
1541       h->got.offset = s->_raw_size;
1542       s->_raw_size += 4;
1543       /* R_386_TLS_GD needs 2 consecutive GOT slots.  */
1544       if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE_BOTH)
1545         s->_raw_size += 4;
1546       dyn = htab->elf.dynamic_sections_created;
1547       /* R_386_TLS_IE_32 needs one dynamic relocation,
1548          R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1549          (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1550          need two), R_386_TLS_GD needs one if local symbol and two if
1551          global.  */
1552       if (tls_type == GOT_TLS_IE_BOTH)
1553         htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rel);
1554       else if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1555                || (tls_type & GOT_TLS_IE))
1556         htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1557       else if (tls_type == GOT_TLS_GD)
1558         htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rel);
1559       else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1560                 || h->root.type != bfd_link_hash_undefweak)
1561                && (info->shared
1562                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1563         htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1564     }
1565   else
1566     h->got.offset = (bfd_vma) -1;
1567
1568   eh = (struct elf_i386_link_hash_entry *) h;
1569   if (eh->dyn_relocs == NULL)
1570     return TRUE;
1571
1572   /* In the shared -Bsymbolic case, discard space allocated for
1573      dynamic pc-relative relocs against symbols which turn out to be
1574      defined in regular objects.  For the normal shared case, discard
1575      space for pc-relative relocs that have become local due to symbol
1576      visibility changes.  */
1577
1578   if (info->shared)
1579     {
1580       /* The only reloc that uses pc_count is R_386_PC32, which will
1581          appear on a call or on something like ".long foo - .".  We
1582          want calls to protected symbols to resolve directly to the
1583          function rather than going via the plt.  If people want
1584          function pointer comparisons to work as expected then they
1585          should avoid writing assembly like ".long foo - .".  */
1586       if (SYMBOL_CALLS_LOCAL (info, h))
1587         {
1588           struct elf_i386_dyn_relocs **pp;
1589
1590           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1591             {
1592               p->count -= p->pc_count;
1593               p->pc_count = 0;
1594               if (p->count == 0)
1595                 *pp = p->next;
1596               else
1597                 pp = &p->next;
1598             }
1599         }
1600
1601       /* Also discard relocs on undefined weak syms with non-default
1602          visibility.  */
1603       if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1604           && h->root.type == bfd_link_hash_undefweak)
1605         eh->dyn_relocs = NULL;
1606     }
1607   else if (ELIMINATE_COPY_RELOCS)
1608     {
1609       /* For the non-shared case, discard space for relocs against
1610          symbols which turn out to need copy relocs or are not
1611          dynamic.  */
1612
1613       if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1614           && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1615                && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1616               || (htab->elf.dynamic_sections_created
1617                   && (h->root.type == bfd_link_hash_undefweak
1618                       || h->root.type == bfd_link_hash_undefined))))
1619         {
1620           /* Make sure this symbol is output as a dynamic symbol.
1621              Undefined weak syms won't yet be marked as dynamic.  */
1622           if (h->dynindx == -1
1623               && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1624             {
1625               if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1626                 return FALSE;
1627             }
1628
1629           /* If that succeeded, we know we'll be keeping all the
1630              relocs.  */
1631           if (h->dynindx != -1)
1632             goto keep;
1633         }
1634
1635       eh->dyn_relocs = NULL;
1636
1637     keep: ;
1638     }
1639
1640   /* Finally, allocate space.  */
1641   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1642     {
1643       asection *sreloc = elf_section_data (p->sec)->sreloc;
1644       sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel);
1645     }
1646
1647   return TRUE;
1648 }
1649
1650 /* Find any dynamic relocs that apply to read-only sections.  */
1651
1652 static bfd_boolean
1653 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1654 {
1655   struct elf_i386_link_hash_entry *eh;
1656   struct elf_i386_dyn_relocs *p;
1657
1658   if (h->root.type == bfd_link_hash_warning)
1659     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1660
1661   eh = (struct elf_i386_link_hash_entry *) h;
1662   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1663     {
1664       asection *s = p->sec->output_section;
1665
1666       if (s != NULL && (s->flags & SEC_READONLY) != 0)
1667         {
1668           struct bfd_link_info *info = (struct bfd_link_info *) inf;
1669
1670           info->flags |= DF_TEXTREL;
1671
1672           /* Not an error, just cut short the traversal.  */
1673           return FALSE;
1674         }
1675     }
1676   return TRUE;
1677 }
1678
1679 /* Set the sizes of the dynamic sections.  */
1680
1681 static bfd_boolean
1682 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1683                                 struct bfd_link_info *info)
1684 {
1685   struct elf_i386_link_hash_table *htab;
1686   bfd *dynobj;
1687   asection *s;
1688   bfd_boolean relocs;
1689   bfd *ibfd;
1690
1691   htab = elf_i386_hash_table (info);
1692   dynobj = htab->elf.dynobj;
1693   if (dynobj == NULL)
1694     abort ();
1695
1696   if (htab->elf.dynamic_sections_created)
1697     {
1698       /* Set the contents of the .interp section to the interpreter.  */
1699       if (info->executable)
1700         {
1701           s = bfd_get_section_by_name (dynobj, ".interp");
1702           if (s == NULL)
1703             abort ();
1704           s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1705           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1706         }
1707     }
1708
1709   /* Set up .got offsets for local syms, and space for local dynamic
1710      relocs.  */
1711   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1712     {
1713       bfd_signed_vma *local_got;
1714       bfd_signed_vma *end_local_got;
1715       char *local_tls_type;
1716       bfd_size_type locsymcount;
1717       Elf_Internal_Shdr *symtab_hdr;
1718       asection *srel;
1719
1720       if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1721         continue;
1722
1723       for (s = ibfd->sections; s != NULL; s = s->next)
1724         {
1725           struct elf_i386_dyn_relocs *p;
1726
1727           for (p = *((struct elf_i386_dyn_relocs **)
1728                      &elf_section_data (s)->local_dynrel);
1729                p != NULL;
1730                p = p->next)
1731             {
1732               if (!bfd_is_abs_section (p->sec)
1733                   && bfd_is_abs_section (p->sec->output_section))
1734                 {
1735                   /* Input section has been discarded, either because
1736                      it is a copy of a linkonce section or due to
1737                      linker script /DISCARD/, so we'll be discarding
1738                      the relocs too.  */
1739                 }
1740               else if (p->count != 0)
1741                 {
1742                   srel = elf_section_data (p->sec)->sreloc;
1743                   srel->_raw_size += p->count * sizeof (Elf32_External_Rel);
1744                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1745                     info->flags |= DF_TEXTREL;
1746                 }
1747             }
1748         }
1749
1750       local_got = elf_local_got_refcounts (ibfd);
1751       if (!local_got)
1752         continue;
1753
1754       symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1755       locsymcount = symtab_hdr->sh_info;
1756       end_local_got = local_got + locsymcount;
1757       local_tls_type = elf_i386_local_got_tls_type (ibfd);
1758       s = htab->sgot;
1759       srel = htab->srelgot;
1760       for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1761         {
1762           if (*local_got > 0)
1763             {
1764               *local_got = s->_raw_size;
1765               s->_raw_size += 4;
1766               if (*local_tls_type == GOT_TLS_GD
1767                   || *local_tls_type == GOT_TLS_IE_BOTH)
1768                 s->_raw_size += 4;
1769               if (info->shared
1770                   || *local_tls_type == GOT_TLS_GD
1771                   || (*local_tls_type & GOT_TLS_IE))
1772                 {
1773                   if (*local_tls_type == GOT_TLS_IE_BOTH)
1774                     srel->_raw_size += 2 * sizeof (Elf32_External_Rel);
1775                   else
1776                     srel->_raw_size += sizeof (Elf32_External_Rel);
1777                 }
1778             }
1779           else
1780             *local_got = (bfd_vma) -1;
1781         }
1782     }
1783
1784   if (htab->tls_ldm_got.refcount > 0)
1785     {
1786       /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1787          relocs.  */
1788       htab->tls_ldm_got.offset = htab->sgot->_raw_size;
1789       htab->sgot->_raw_size += 8;
1790       htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1791     }
1792   else
1793     htab->tls_ldm_got.offset = -1;
1794
1795   /* Allocate global sym .plt and .got entries, and space for global
1796      sym dynamic relocs.  */
1797   elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1798
1799   /* We now have determined the sizes of the various dynamic sections.
1800      Allocate memory for them.  */
1801   relocs = FALSE;
1802   for (s = dynobj->sections; s != NULL; s = s->next)
1803     {
1804       if ((s->flags & SEC_LINKER_CREATED) == 0)
1805         continue;
1806
1807       if (s == htab->splt
1808           || s == htab->sgot
1809           || s == htab->sgotplt)
1810         {
1811           /* Strip this section if we don't need it; see the
1812              comment below.  */
1813         }
1814       else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
1815         {
1816           if (s->_raw_size != 0 && s != htab->srelplt)
1817             relocs = TRUE;
1818
1819           /* We use the reloc_count field as a counter if we need
1820              to copy relocs into the output file.  */
1821           s->reloc_count = 0;
1822         }
1823       else
1824         {
1825           /* It's not one of our sections, so don't allocate space.  */
1826           continue;
1827         }
1828
1829       if (s->_raw_size == 0)
1830         {
1831           /* If we don't need this section, strip it from the
1832              output file.  This is mostly to handle .rel.bss and
1833              .rel.plt.  We must create both sections in
1834              create_dynamic_sections, because they must be created
1835              before the linker maps input sections to output
1836              sections.  The linker does that before
1837              adjust_dynamic_symbol is called, and it is that
1838              function which decides whether anything needs to go
1839              into these sections.  */
1840
1841           _bfd_strip_section_from_output (info, s);
1842           continue;
1843         }
1844
1845       /* Allocate memory for the section contents.  We use bfd_zalloc
1846          here in case unused entries are not reclaimed before the
1847          section's contents are written out.  This should not happen,
1848          but this way if it does, we get a R_386_NONE reloc instead
1849          of garbage.  */
1850       s->contents = bfd_zalloc (dynobj, s->_raw_size);
1851       if (s->contents == NULL)
1852         return FALSE;
1853     }
1854
1855   if (htab->elf.dynamic_sections_created)
1856     {
1857       /* Add some entries to the .dynamic section.  We fill in the
1858          values later, in elf_i386_finish_dynamic_sections, but we
1859          must add the entries now so that we get the correct size for
1860          the .dynamic section.  The DT_DEBUG entry is filled in by the
1861          dynamic linker and used by the debugger.  */
1862 #define add_dynamic_entry(TAG, VAL) \
1863   bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
1864
1865       if (info->executable)
1866         {
1867           if (!add_dynamic_entry (DT_DEBUG, 0))
1868             return FALSE;
1869         }
1870
1871       if (htab->splt->_raw_size != 0)
1872         {
1873           if (!add_dynamic_entry (DT_PLTGOT, 0)
1874               || !add_dynamic_entry (DT_PLTRELSZ, 0)
1875               || !add_dynamic_entry (DT_PLTREL, DT_REL)
1876               || !add_dynamic_entry (DT_JMPREL, 0))
1877             return FALSE;
1878         }
1879
1880       if (relocs)
1881         {
1882           if (!add_dynamic_entry (DT_REL, 0)
1883               || !add_dynamic_entry (DT_RELSZ, 0)
1884               || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
1885             return FALSE;
1886
1887           /* If any dynamic relocs apply to a read-only section,
1888              then we need a DT_TEXTREL entry.  */
1889           if ((info->flags & DF_TEXTREL) == 0)
1890             elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1891                                     (PTR) info);
1892
1893           if ((info->flags & DF_TEXTREL) != 0)
1894             {
1895               if (!add_dynamic_entry (DT_TEXTREL, 0))
1896                 return FALSE;
1897             }
1898         }
1899     }
1900 #undef add_dynamic_entry
1901
1902   return TRUE;
1903 }
1904
1905 /* Set the correct type for an x86 ELF section.  We do this by the
1906    section name, which is a hack, but ought to work.  */
1907
1908 static bfd_boolean
1909 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1910                         Elf_Internal_Shdr *hdr,
1911                         asection *sec)
1912 {
1913   register const char *name;
1914
1915   name = bfd_get_section_name (abfd, sec);
1916
1917   /* This is an ugly, but unfortunately necessary hack that is
1918      needed when producing EFI binaries on x86. It tells
1919      elf.c:elf_fake_sections() not to consider ".reloc" as a section
1920      containing ELF relocation info.  We need this hack in order to
1921      be able to generate ELF binaries that can be translated into
1922      EFI applications (which are essentially COFF objects).  Those
1923      files contain a COFF ".reloc" section inside an ELFNN object,
1924      which would normally cause BFD to segfault because it would
1925      attempt to interpret this section as containing relocation
1926      entries for section "oc".  With this hack enabled, ".reloc"
1927      will be treated as a normal data section, which will avoid the
1928      segfault.  However, you won't be able to create an ELFNN binary
1929      with a section named "oc" that needs relocations, but that's
1930      the kind of ugly side-effects you get when detecting section
1931      types based on their names...  In practice, this limitation is
1932      unlikely to bite.  */
1933   if (strcmp (name, ".reloc") == 0)
1934     hdr->sh_type = SHT_PROGBITS;
1935
1936   return TRUE;
1937 }
1938
1939 /* Return the base VMA address which should be subtracted from real addresses
1940    when resolving @dtpoff relocation.
1941    This is PT_TLS segment p_vaddr.  */
1942
1943 static bfd_vma
1944 dtpoff_base (struct bfd_link_info *info)
1945 {
1946   /* If tls_sec is NULL, we should have signalled an error already.  */
1947   if (elf_hash_table (info)->tls_sec == NULL)
1948     return 0;
1949   return elf_hash_table (info)->tls_sec->vma;
1950 }
1951
1952 /* Return the relocation value for @tpoff relocation
1953    if STT_TLS virtual address is ADDRESS.  */
1954
1955 static bfd_vma
1956 tpoff (struct bfd_link_info *info, bfd_vma address)
1957 {
1958   struct elf_link_hash_table *htab = elf_hash_table (info);
1959
1960   /* If tls_sec is NULL, we should have signalled an error already.  */
1961   if (htab->tls_sec == NULL)
1962     return 0;
1963   return htab->tls_size + htab->tls_sec->vma - address;
1964 }
1965
1966 /* Relocate an i386 ELF section.  */
1967
1968 static bfd_boolean
1969 elf_i386_relocate_section (bfd *output_bfd,
1970                            struct bfd_link_info *info,
1971                            bfd *input_bfd,
1972                            asection *input_section,
1973                            bfd_byte *contents,
1974                            Elf_Internal_Rela *relocs,
1975                            Elf_Internal_Sym *local_syms,
1976                            asection **local_sections)
1977 {
1978   struct elf_i386_link_hash_table *htab;
1979   Elf_Internal_Shdr *symtab_hdr;
1980   struct elf_link_hash_entry **sym_hashes;
1981   bfd_vma *local_got_offsets;
1982   Elf_Internal_Rela *rel;
1983   Elf_Internal_Rela *relend;
1984
1985   htab = elf_i386_hash_table (info);
1986   symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1987   sym_hashes = elf_sym_hashes (input_bfd);
1988   local_got_offsets = elf_local_got_offsets (input_bfd);
1989
1990   rel = relocs;
1991   relend = relocs + input_section->reloc_count;
1992   for (; rel < relend; rel++)
1993     {
1994       unsigned int r_type;
1995       reloc_howto_type *howto;
1996       unsigned long r_symndx;
1997       struct elf_link_hash_entry *h;
1998       Elf_Internal_Sym *sym;
1999       asection *sec;
2000       bfd_vma off;
2001       bfd_vma relocation;
2002       bfd_boolean unresolved_reloc;
2003       bfd_reloc_status_type r;
2004       unsigned int indx;
2005       int tls_type;
2006
2007       r_type = ELF32_R_TYPE (rel->r_info);
2008       if (r_type == R_386_GNU_VTINHERIT
2009           || r_type == R_386_GNU_VTENTRY)
2010         continue;
2011
2012       if ((indx = r_type) >= R_386_standard
2013           && ((indx = r_type - R_386_ext_offset) - R_386_standard
2014               >= R_386_ext - R_386_standard)
2015           && ((indx = r_type - R_386_tls_offset) - R_386_ext
2016               >= R_386_tls - R_386_ext))
2017         {
2018           bfd_set_error (bfd_error_bad_value);
2019           return FALSE;
2020         }
2021       howto = elf_howto_table + indx;
2022
2023       r_symndx = ELF32_R_SYM (rel->r_info);
2024
2025       if (info->relocatable)
2026         {
2027           bfd_vma val;
2028           bfd_byte *where;
2029
2030           /* This is a relocatable link.  We don't have to change
2031              anything, unless the reloc is against a section symbol,
2032              in which case we have to adjust according to where the
2033              section symbol winds up in the output section.  */
2034           if (r_symndx >= symtab_hdr->sh_info)
2035             continue;
2036
2037           sym = local_syms + r_symndx;
2038           if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2039             continue;
2040
2041           sec = local_sections[r_symndx];
2042           val = sec->output_offset;
2043           if (val == 0)
2044             continue;
2045
2046           where = contents + rel->r_offset;
2047           switch (howto->size)
2048             {
2049               /* FIXME: overflow checks.  */
2050             case 0:
2051               val += bfd_get_8 (input_bfd, where);
2052               bfd_put_8 (input_bfd, val, where);
2053               break;
2054             case 1:
2055               val += bfd_get_16 (input_bfd, where);
2056               bfd_put_16 (input_bfd, val, where);
2057               break;
2058             case 2:
2059               val += bfd_get_32 (input_bfd, where);
2060               bfd_put_32 (input_bfd, val, where);
2061               break;
2062             default:
2063               abort ();
2064             }
2065           continue;
2066         }
2067
2068       /* This is a final link.  */
2069       h = NULL;
2070       sym = NULL;
2071       sec = NULL;
2072       unresolved_reloc = FALSE;
2073       if (r_symndx < symtab_hdr->sh_info)
2074         {
2075           sym = local_syms + r_symndx;
2076           sec = local_sections[r_symndx];
2077           relocation = (sec->output_section->vma
2078                         + sec->output_offset
2079                         + sym->st_value);
2080           if ((sec->flags & SEC_MERGE)
2081               && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2082             {
2083               asection *msec;
2084               bfd_vma addend;
2085               bfd_byte *where = contents + rel->r_offset;
2086
2087               switch (howto->size)
2088                 {
2089                 case 0:
2090                   addend = bfd_get_8 (input_bfd, where);
2091                   if (howto->pc_relative)
2092                     {
2093                       addend = (addend ^ 0x80) - 0x80;
2094                       addend += 1;
2095                     }
2096                   break;
2097                 case 1:
2098                   addend = bfd_get_16 (input_bfd, where);
2099                   if (howto->pc_relative)
2100                     {
2101                       addend = (addend ^ 0x8000) - 0x8000;
2102                       addend += 2;
2103                     }
2104                   break;
2105                 case 2:
2106                   addend = bfd_get_32 (input_bfd, where);
2107                   if (howto->pc_relative)
2108                     {
2109                       addend = (addend ^ 0x80000000) - 0x80000000;
2110                       addend += 4;
2111                     }
2112                   break;
2113                 default:
2114                   abort ();
2115                 }
2116
2117               msec = sec;
2118               addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2119               addend -= relocation;
2120               addend += msec->output_section->vma + msec->output_offset;
2121
2122               switch (howto->size)
2123                 {
2124                 case 0:
2125                   /* FIXME: overflow checks.  */
2126                   if (howto->pc_relative)
2127                     addend -= 1;
2128                   bfd_put_8 (input_bfd, addend, where);
2129                   break;
2130                 case 1:
2131                   if (howto->pc_relative)
2132                     addend -= 2;
2133                   bfd_put_16 (input_bfd, addend, where);
2134                   break;
2135                 case 2:
2136                   if (howto->pc_relative)
2137                     addend -= 4;
2138                   bfd_put_32 (input_bfd, addend, where);
2139                   break;
2140                 }
2141             }
2142         }
2143       else
2144         {
2145           bfd_boolean warned;
2146
2147           RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, symtab_hdr, relocation, sec, unresolved_reloc, info, warned);
2148         }
2149
2150       switch (r_type)
2151         {
2152         case R_386_GOT32:
2153           /* Relocation is to the entry for this symbol in the global
2154              offset table.  */
2155           if (htab->sgot == NULL)
2156             abort ();
2157
2158           if (h != NULL)
2159             {
2160               bfd_boolean dyn;
2161
2162               off = h->got.offset;
2163               dyn = htab->elf.dynamic_sections_created;
2164               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2165                   || (info->shared
2166                       && SYMBOL_REFERENCES_LOCAL (info, h))
2167                   || (ELF_ST_VISIBILITY (h->other)
2168                       && h->root.type == bfd_link_hash_undefweak))
2169                 {
2170                   /* This is actually a static link, or it is a
2171                      -Bsymbolic link and the symbol is defined
2172                      locally, or the symbol was forced to be local
2173                      because of a version file.  We must initialize
2174                      this entry in the global offset table.  Since the
2175                      offset must always be a multiple of 4, we use the
2176                      least significant bit to record whether we have
2177                      initialized it already.
2178
2179                      When doing a dynamic link, we create a .rel.got
2180                      relocation entry to initialize the value.  This
2181                      is done in the finish_dynamic_symbol routine.  */
2182                   if ((off & 1) != 0)
2183                     off &= ~1;
2184                   else
2185                     {
2186                       bfd_put_32 (output_bfd, relocation,
2187                                   htab->sgot->contents + off);
2188                       h->got.offset |= 1;
2189                     }
2190                 }
2191               else
2192                 unresolved_reloc = FALSE;
2193             }
2194           else
2195             {
2196               if (local_got_offsets == NULL)
2197                 abort ();
2198
2199               off = local_got_offsets[r_symndx];
2200
2201               /* The offset must always be a multiple of 4.  We use
2202                  the least significant bit to record whether we have
2203                  already generated the necessary reloc.  */
2204               if ((off & 1) != 0)
2205                 off &= ~1;
2206               else
2207                 {
2208                   bfd_put_32 (output_bfd, relocation,
2209                               htab->sgot->contents + off);
2210
2211                   if (info->shared)
2212                     {
2213                       asection *s;
2214                       Elf_Internal_Rela outrel;
2215                       bfd_byte *loc;
2216
2217                       s = htab->srelgot;
2218                       if (s == NULL)
2219                         abort ();
2220
2221                       outrel.r_offset = (htab->sgot->output_section->vma
2222                                          + htab->sgot->output_offset
2223                                          + off);
2224                       outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2225                       loc = s->contents;
2226                       loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
2227                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2228                     }
2229
2230                   local_got_offsets[r_symndx] |= 1;
2231                 }
2232             }
2233
2234           if (off >= (bfd_vma) -2)
2235             abort ();
2236
2237           relocation = htab->sgot->output_offset + off;
2238           break;
2239
2240         case R_386_GOTOFF:
2241           /* Relocation is relative to the start of the global offset
2242              table.  */
2243
2244           /* Note that sgot->output_offset is not involved in this
2245              calculation.  We always want the start of .got.  If we
2246              defined _GLOBAL_OFFSET_TABLE in a different way, as is
2247              permitted by the ABI, we might have to change this
2248              calculation.  */
2249           relocation -= htab->sgot->output_section->vma;
2250           break;
2251
2252         case R_386_GOTPC:
2253           /* Use global offset table as symbol value.  */
2254           relocation = htab->sgot->output_section->vma;
2255           unresolved_reloc = FALSE;
2256           break;
2257
2258         case R_386_PLT32:
2259           /* Relocation is to the entry for this symbol in the
2260              procedure linkage table.  */
2261
2262           /* Resolve a PLT32 reloc against a local symbol directly,
2263              without using the procedure linkage table.  */
2264           if (h == NULL)
2265             break;
2266
2267           if (h->plt.offset == (bfd_vma) -1
2268               || htab->splt == NULL)
2269             {
2270               /* We didn't make a PLT entry for this symbol.  This
2271                  happens when statically linking PIC code, or when
2272                  using -Bsymbolic.  */
2273               break;
2274             }
2275
2276           relocation = (htab->splt->output_section->vma
2277                         + htab->splt->output_offset
2278                         + h->plt.offset);
2279           unresolved_reloc = FALSE;
2280           break;
2281
2282         case R_386_32:
2283         case R_386_PC32:
2284           /* r_symndx will be zero only for relocs against symbols
2285              from removed linkonce sections, or sections discarded by
2286              a linker script.  */
2287           if (r_symndx == 0
2288               || (input_section->flags & SEC_ALLOC) == 0)
2289             break;
2290
2291           if ((info->shared
2292                && (h == NULL
2293                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2294                    || h->root.type != bfd_link_hash_undefweak)
2295                && (r_type != R_386_PC32
2296                    || !SYMBOL_CALLS_LOCAL (info, h)))
2297               || (ELIMINATE_COPY_RELOCS
2298                   && !info->shared
2299                   && h != NULL
2300                   && h->dynindx != -1
2301                   && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2302                   && (((h->elf_link_hash_flags
2303                         & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2304                        && (h->elf_link_hash_flags
2305                            & ELF_LINK_HASH_DEF_REGULAR) == 0)
2306                       || h->root.type == bfd_link_hash_undefweak
2307                       || h->root.type == bfd_link_hash_undefined)))
2308             {
2309               Elf_Internal_Rela outrel;
2310               bfd_byte *loc;
2311               bfd_boolean skip, relocate;
2312               asection *sreloc;
2313
2314               /* When generating a shared object, these relocations
2315                  are copied into the output file to be resolved at run
2316                  time.  */
2317
2318               skip = FALSE;
2319               relocate = FALSE;
2320
2321               outrel.r_offset =
2322                 _bfd_elf_section_offset (output_bfd, info, input_section,
2323                                          rel->r_offset);
2324               if (outrel.r_offset == (bfd_vma) -1)
2325                 skip = TRUE;
2326               else if (outrel.r_offset == (bfd_vma) -2)
2327                 skip = TRUE, relocate = TRUE;
2328               outrel.r_offset += (input_section->output_section->vma
2329                                   + input_section->output_offset);
2330
2331               if (skip)
2332                 memset (&outrel, 0, sizeof outrel);
2333               else if (h != NULL
2334                        && h->dynindx != -1
2335                        && (r_type == R_386_PC32
2336                            || !info->shared
2337                            || !info->symbolic
2338                            || (h->elf_link_hash_flags
2339                                & ELF_LINK_HASH_DEF_REGULAR) == 0))
2340                 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2341               else
2342                 {
2343                   /* This symbol is local, or marked to become local.  */
2344                   relocate = TRUE;
2345                   outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2346                 }
2347
2348               sreloc = elf_section_data (input_section)->sreloc;
2349               if (sreloc == NULL)
2350                 abort ();
2351
2352               loc = sreloc->contents;
2353               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2354               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2355
2356               /* If this reloc is against an external symbol, we do
2357                  not want to fiddle with the addend.  Otherwise, we
2358                  need to include the symbol value so that it becomes
2359                  an addend for the dynamic reloc.  */
2360               if (! relocate)
2361                 continue;
2362             }
2363           break;
2364
2365         case R_386_TLS_IE:
2366           if (info->shared)
2367             {
2368               Elf_Internal_Rela outrel;
2369               bfd_byte *loc;
2370               asection *sreloc;
2371
2372               outrel.r_offset = rel->r_offset
2373                                 + input_section->output_section->vma
2374                                 + input_section->output_offset;
2375               outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2376               sreloc = elf_section_data (input_section)->sreloc;
2377               if (sreloc == NULL)
2378                 abort ();
2379               loc = sreloc->contents;
2380               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2381               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2382             }
2383           /* Fall through */
2384
2385         case R_386_TLS_GD:
2386         case R_386_TLS_IE_32:
2387         case R_386_TLS_GOTIE:
2388           r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2389           tls_type = GOT_UNKNOWN;
2390           if (h == NULL && local_got_offsets)
2391             tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2392           else if (h != NULL)
2393             {
2394               tls_type = elf_i386_hash_entry(h)->tls_type;
2395               if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
2396                 r_type = R_386_TLS_LE_32;
2397             }
2398           if (tls_type == GOT_TLS_IE)
2399             tls_type = GOT_TLS_IE_NEG;
2400           if (r_type == R_386_TLS_GD)
2401             {
2402               if (tls_type == GOT_TLS_IE_POS)
2403                 r_type = R_386_TLS_GOTIE;
2404               else if (tls_type & GOT_TLS_IE)
2405                 r_type = R_386_TLS_IE_32;
2406             }
2407
2408           if (r_type == R_386_TLS_LE_32)
2409             {
2410               BFD_ASSERT (! unresolved_reloc);
2411               if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2412                 {
2413                   unsigned int val, type;
2414                   bfd_vma roff;
2415
2416                   /* GD->LE transition.  */
2417                   BFD_ASSERT (rel->r_offset >= 2);
2418                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2419                   BFD_ASSERT (type == 0x8d || type == 0x04);
2420                   BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2421                   BFD_ASSERT (bfd_get_8 (input_bfd,
2422                                          contents + rel->r_offset + 4)
2423                               == 0xe8);
2424                   BFD_ASSERT (rel + 1 < relend);
2425                   BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2426                   roff = rel->r_offset + 5;
2427                   val = bfd_get_8 (input_bfd,
2428                                    contents + rel->r_offset - 1);
2429                   if (type == 0x04)
2430                     {
2431                       /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2432                          Change it into:
2433                          movl %gs:0, %eax; subl $foo@tpoff, %eax
2434                          (6 byte form of subl).  */
2435                       BFD_ASSERT (rel->r_offset >= 3);
2436                       BFD_ASSERT (bfd_get_8 (input_bfd,
2437                                              contents + rel->r_offset - 3)
2438                                   == 0x8d);
2439                       BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2440                       memcpy (contents + rel->r_offset - 3,
2441                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2442                     }
2443                   else
2444                     {
2445                       BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2446                       if (rel->r_offset + 10 <= input_section->_raw_size
2447                           && bfd_get_8 (input_bfd,
2448                                         contents + rel->r_offset + 9) == 0x90)
2449                         {
2450                           /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2451                              Change it into:
2452                              movl %gs:0, %eax; subl $foo@tpoff, %eax
2453                              (6 byte form of subl).  */
2454                           memcpy (contents + rel->r_offset - 2,
2455                                   "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2456                           roff = rel->r_offset + 6;
2457                         }
2458                       else
2459                         {
2460                           /* leal foo(%reg), %eax; call ___tls_get_addr
2461                              Change it into:
2462                              movl %gs:0, %eax; subl $foo@tpoff, %eax
2463                              (5 byte form of subl).  */
2464                           memcpy (contents + rel->r_offset - 2,
2465                                   "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2466                         }
2467                     }
2468                   bfd_put_32 (output_bfd, tpoff (info, relocation),
2469                               contents + roff);
2470                   /* Skip R_386_PLT32.  */
2471                   rel++;
2472                   continue;
2473                 }
2474               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
2475                 {
2476                   unsigned int val, type;
2477
2478                   /* IE->LE transition:
2479                      Originally it can be one of:
2480                      movl foo, %eax
2481                      movl foo, %reg
2482                      addl foo, %reg
2483                      We change it into:
2484                      movl $foo, %eax
2485                      movl $foo, %reg
2486                      addl $foo, %reg.  */
2487                   BFD_ASSERT (rel->r_offset >= 1);
2488                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2489                   BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2490                   if (val == 0xa1)
2491                     {
2492                       /* movl foo, %eax.  */
2493                       bfd_put_8 (output_bfd, 0xb8,
2494                                  contents + rel->r_offset - 1);
2495                     }
2496                   else
2497                     {
2498                       BFD_ASSERT (rel->r_offset >= 2);
2499                       type = bfd_get_8 (input_bfd,
2500                                         contents + rel->r_offset - 2);
2501                       switch (type)
2502                         {
2503                         case 0x8b:
2504                           /* movl */
2505                           BFD_ASSERT ((val & 0xc7) == 0x05);
2506                           bfd_put_8 (output_bfd, 0xc7,
2507                                      contents + rel->r_offset - 2);
2508                           bfd_put_8 (output_bfd,
2509                                      0xc0 | ((val >> 3) & 7),
2510                                      contents + rel->r_offset - 1);
2511                           break;
2512                         case 0x03:
2513                           /* addl */
2514                           BFD_ASSERT ((val & 0xc7) == 0x05);
2515                           bfd_put_8 (output_bfd, 0x81,
2516                                      contents + rel->r_offset - 2);
2517                           bfd_put_8 (output_bfd,
2518                                      0xc0 | ((val >> 3) & 7),
2519                                      contents + rel->r_offset - 1);
2520                           break;
2521                         default:
2522                           BFD_FAIL ();
2523                           break;
2524                         }
2525                     }
2526                   bfd_put_32 (output_bfd, -tpoff (info, relocation),
2527                               contents + rel->r_offset);
2528                   continue;
2529                 }
2530               else
2531                 {
2532                   unsigned int val, type;
2533
2534                   /* {IE_32,GOTIE}->LE transition:
2535                      Originally it can be one of:
2536                      subl foo(%reg1), %reg2
2537                      movl foo(%reg1), %reg2
2538                      addl foo(%reg1), %reg2
2539                      We change it into:
2540                      subl $foo, %reg2
2541                      movl $foo, %reg2 (6 byte form)
2542                      addl $foo, %reg2.  */
2543                   BFD_ASSERT (rel->r_offset >= 2);
2544                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2545                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2546                   BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2547                   BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
2548                   if (type == 0x8b)
2549                     {
2550                       /* movl */
2551                       bfd_put_8 (output_bfd, 0xc7,
2552                                  contents + rel->r_offset - 2);
2553                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2554                                  contents + rel->r_offset - 1);
2555                     }
2556                   else if (type == 0x2b)
2557                     {
2558                       /* subl */
2559                       bfd_put_8 (output_bfd, 0x81,
2560                                  contents + rel->r_offset - 2);
2561                       bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2562                                  contents + rel->r_offset - 1);
2563                     }
2564                   else if (type == 0x03)
2565                     {
2566                       /* addl */
2567                       bfd_put_8 (output_bfd, 0x81,
2568                                  contents + rel->r_offset - 2);
2569                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2570                                  contents + rel->r_offset - 1);
2571                     }
2572                   else
2573                     BFD_FAIL ();
2574                   if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2575                     bfd_put_32 (output_bfd, -tpoff (info, relocation),
2576                                 contents + rel->r_offset);
2577                   else
2578                     bfd_put_32 (output_bfd, tpoff (info, relocation),
2579                                 contents + rel->r_offset);
2580                   continue;
2581                 }
2582             }
2583
2584           if (htab->sgot == NULL)
2585             abort ();
2586
2587           if (h != NULL)
2588             off = h->got.offset;
2589           else
2590             {
2591               if (local_got_offsets == NULL)
2592                 abort ();
2593
2594               off = local_got_offsets[r_symndx];
2595             }
2596
2597           if ((off & 1) != 0)
2598             off &= ~1;
2599           else
2600             {
2601               Elf_Internal_Rela outrel;
2602               bfd_byte *loc;
2603               int dr_type, indx;
2604
2605               if (htab->srelgot == NULL)
2606                 abort ();
2607
2608               outrel.r_offset = (htab->sgot->output_section->vma
2609                                  + htab->sgot->output_offset + off);
2610
2611               indx = h && h->dynindx != -1 ? h->dynindx : 0;
2612               if (r_type == R_386_TLS_GD)
2613                 dr_type = R_386_TLS_DTPMOD32;
2614               else if (tls_type == GOT_TLS_IE_POS)
2615                 dr_type = R_386_TLS_TPOFF;
2616               else
2617                 dr_type = R_386_TLS_TPOFF32;
2618               if (dr_type == R_386_TLS_TPOFF && indx == 0)
2619                 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
2620                             htab->sgot->contents + off);
2621               else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
2622                 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
2623                             htab->sgot->contents + off);
2624               else
2625                 bfd_put_32 (output_bfd, 0,
2626                             htab->sgot->contents + off);
2627               outrel.r_info = ELF32_R_INFO (indx, dr_type);
2628               loc = htab->srelgot->contents;
2629               loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2630               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2631
2632               if (r_type == R_386_TLS_GD)
2633                 {
2634                   if (indx == 0)
2635                     {
2636                       BFD_ASSERT (! unresolved_reloc);
2637                       bfd_put_32 (output_bfd,
2638                                   relocation - dtpoff_base (info),
2639                                   htab->sgot->contents + off + 4);
2640                     }
2641                   else
2642                     {
2643                       bfd_put_32 (output_bfd, 0,
2644                                   htab->sgot->contents + off + 4);
2645                       outrel.r_info = ELF32_R_INFO (indx,
2646                                                     R_386_TLS_DTPOFF32);
2647                       outrel.r_offset += 4;
2648                       htab->srelgot->reloc_count++;
2649                       loc += sizeof (Elf32_External_Rel);
2650                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2651                     }
2652                 }
2653               else if (tls_type == GOT_TLS_IE_BOTH)
2654                 {
2655                   bfd_put_32 (output_bfd,
2656                               indx == 0 ? relocation - dtpoff_base (info) : 0,
2657                               htab->sgot->contents + off + 4);
2658                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2659                   outrel.r_offset += 4;
2660                   htab->srelgot->reloc_count++;
2661                   loc += sizeof (Elf32_External_Rel);
2662                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2663                 }
2664
2665               if (h != NULL)
2666                 h->got.offset |= 1;
2667               else
2668                 local_got_offsets[r_symndx] |= 1;
2669             }
2670
2671           if (off >= (bfd_vma) -2)
2672             abort ();
2673           if (r_type == ELF32_R_TYPE (rel->r_info))
2674             {
2675               relocation = htab->sgot->output_offset + off;
2676               if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
2677                   && tls_type == GOT_TLS_IE_BOTH)
2678                 relocation += 4;
2679               if (r_type == R_386_TLS_IE)
2680                 relocation += htab->sgot->output_section->vma;
2681               unresolved_reloc = FALSE;
2682             }
2683           else
2684             {
2685               unsigned int val, type;
2686               bfd_vma roff;
2687
2688               /* GD->IE transition.  */
2689               BFD_ASSERT (rel->r_offset >= 2);
2690               type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2691               BFD_ASSERT (type == 0x8d || type == 0x04);
2692               BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2693               BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2694                           == 0xe8);
2695               BFD_ASSERT (rel + 1 < relend);
2696               BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2697               roff = rel->r_offset - 3;
2698               val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2699               if (type == 0x04)
2700                 {
2701                   /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2702                      Change it into:
2703                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
2704                   BFD_ASSERT (rel->r_offset >= 3);
2705                   BFD_ASSERT (bfd_get_8 (input_bfd,
2706                                          contents + rel->r_offset - 3)
2707                               == 0x8d);
2708                   BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2709                   val >>= 3;
2710                 }
2711               else
2712                 {
2713                   /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2714                      Change it into:
2715                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
2716                   BFD_ASSERT (rel->r_offset + 10 <= input_section->_raw_size);
2717                   BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2718                   BFD_ASSERT (bfd_get_8 (input_bfd,
2719                                          contents + rel->r_offset + 9)
2720                               == 0x90);
2721                   roff = rel->r_offset - 2;
2722                 }
2723               memcpy (contents + roff,
2724                       "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2725               contents[roff + 7] = 0x80 | (val & 7);
2726               /* If foo is used only with foo@gotntpoff(%reg) and
2727                  foo@indntpoff, but not with foo@gottpoff(%reg), change
2728                  subl $foo@gottpoff(%reg), %eax
2729                  into:
2730                  addl $foo@gotntpoff(%reg), %eax.  */
2731               if (r_type == R_386_TLS_GOTIE)
2732                 {
2733                   contents[roff + 6] = 0x03;
2734                   if (tls_type == GOT_TLS_IE_BOTH)
2735                     off += 4;
2736                 }
2737               bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2738                           contents + roff + 8);
2739               /* Skip R_386_PLT32.  */
2740               rel++;
2741               continue;
2742             }
2743           break;
2744
2745         case R_386_TLS_LDM:
2746           if (! info->shared)
2747             {
2748               unsigned int val;
2749
2750               /* LD->LE transition:
2751                  Ensure it is:
2752                  leal foo(%reg), %eax; call ___tls_get_addr.
2753                  We change it into:
2754                  movl %gs:0, %eax; nop; leal 0(%esi,1), %esi.  */
2755               BFD_ASSERT (rel->r_offset >= 2);
2756               BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2757                           == 0x8d);
2758               val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2759               BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2760               BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2761               BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2762                           == 0xe8);
2763               BFD_ASSERT (rel + 1 < relend);
2764               BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2765               memcpy (contents + rel->r_offset - 2,
2766                       "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2767               /* Skip R_386_PLT32.  */
2768               rel++;
2769               continue;
2770             }
2771
2772           if (htab->sgot == NULL)
2773             abort ();
2774
2775           off = htab->tls_ldm_got.offset;
2776           if (off & 1)
2777             off &= ~1;
2778           else
2779             {
2780               Elf_Internal_Rela outrel;
2781               bfd_byte *loc;
2782
2783               if (htab->srelgot == NULL)
2784                 abort ();
2785
2786               outrel.r_offset = (htab->sgot->output_section->vma
2787                                  + htab->sgot->output_offset + off);
2788
2789               bfd_put_32 (output_bfd, 0,
2790                           htab->sgot->contents + off);
2791               bfd_put_32 (output_bfd, 0,
2792                           htab->sgot->contents + off + 4);
2793               outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
2794               loc = htab->srelgot->contents;
2795               loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2796               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2797               htab->tls_ldm_got.offset |= 1;
2798             }
2799           relocation = htab->sgot->output_offset + off;
2800           unresolved_reloc = FALSE;
2801           break;
2802
2803         case R_386_TLS_LDO_32:
2804           if (info->shared || (input_section->flags & SEC_CODE) == 0)
2805             relocation -= dtpoff_base (info);
2806           else
2807             /* When converting LDO to LE, we must negate.  */
2808             relocation = -tpoff (info, relocation);
2809           break;
2810
2811         case R_386_TLS_LE_32:
2812         case R_386_TLS_LE:
2813           if (info->shared)
2814             {
2815               Elf_Internal_Rela outrel;
2816               asection *sreloc;
2817               bfd_byte *loc;
2818               int indx;
2819
2820               outrel.r_offset = rel->r_offset
2821                                 + input_section->output_section->vma
2822                                 + input_section->output_offset;
2823               if (h != NULL && h->dynindx != -1)
2824                 indx = h->dynindx;
2825               else
2826                 indx = 0;
2827               if (r_type == R_386_TLS_LE_32)
2828                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
2829               else
2830                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2831               sreloc = elf_section_data (input_section)->sreloc;
2832               if (sreloc == NULL)
2833                 abort ();
2834               loc = sreloc->contents;
2835               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2836               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2837               if (indx)
2838                 continue;
2839               else if (r_type == R_386_TLS_LE_32)
2840                 relocation = dtpoff_base (info) - relocation;
2841               else
2842                 relocation -= dtpoff_base (info);
2843             }
2844           else if (r_type == R_386_TLS_LE_32)
2845             relocation = tpoff (info, relocation);
2846           else
2847             relocation = -tpoff (info, relocation);
2848           break;
2849
2850         default:
2851           break;
2852         }
2853
2854       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2855          because such sections are not SEC_ALLOC and thus ld.so will
2856          not process them.  */
2857       if (unresolved_reloc
2858           && !((input_section->flags & SEC_DEBUGGING) != 0
2859                && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2860         {
2861           (*_bfd_error_handler)
2862             (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2863              bfd_archive_filename (input_bfd),
2864              bfd_get_section_name (input_bfd, input_section),
2865              (long) rel->r_offset,
2866              h->root.root.string);
2867           return FALSE;
2868         }
2869
2870       r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2871                                     contents, rel->r_offset,
2872                                     relocation, 0);
2873
2874       if (r != bfd_reloc_ok)
2875         {
2876           const char *name;
2877
2878           if (h != NULL)
2879             name = h->root.root.string;
2880           else
2881             {
2882               name = bfd_elf_string_from_elf_section (input_bfd,
2883                                                       symtab_hdr->sh_link,
2884                                                       sym->st_name);
2885               if (name == NULL)
2886                 return FALSE;
2887               if (*name == '\0')
2888                 name = bfd_section_name (input_bfd, sec);
2889             }
2890
2891           if (r == bfd_reloc_overflow)
2892             {
2893               if (! ((*info->callbacks->reloc_overflow)
2894                      (info, name, howto->name, 0,
2895                       input_bfd, input_section, rel->r_offset)))
2896                 return FALSE;
2897             }
2898           else
2899             {
2900               (*_bfd_error_handler)
2901                 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2902                  bfd_archive_filename (input_bfd),
2903                  bfd_get_section_name (input_bfd, input_section),
2904                  (long) rel->r_offset, name, (int) r);
2905               return FALSE;
2906             }
2907         }
2908     }
2909
2910   return TRUE;
2911 }
2912
2913 /* Finish up dynamic symbol handling.  We set the contents of various
2914    dynamic sections here.  */
2915
2916 static bfd_boolean
2917 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
2918                                 struct bfd_link_info *info,
2919                                 struct elf_link_hash_entry *h,
2920                                 Elf_Internal_Sym *sym)
2921 {
2922   struct elf_i386_link_hash_table *htab;
2923
2924   htab = elf_i386_hash_table (info);
2925
2926   if (h->plt.offset != (bfd_vma) -1)
2927     {
2928       bfd_vma plt_index;
2929       bfd_vma got_offset;
2930       Elf_Internal_Rela rel;
2931       bfd_byte *loc;
2932
2933       /* This symbol has an entry in the procedure linkage table.  Set
2934          it up.  */
2935
2936       if (h->dynindx == -1
2937           || htab->splt == NULL
2938           || htab->sgotplt == NULL
2939           || htab->srelplt == NULL)
2940         abort ();
2941
2942       /* Get the index in the procedure linkage table which
2943          corresponds to this symbol.  This is the index of this symbol
2944          in all the symbols for which we are making plt entries.  The
2945          first entry in the procedure linkage table is reserved.  */
2946       plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2947
2948       /* Get the offset into the .got table of the entry that
2949          corresponds to this function.  Each .got entry is 4 bytes.
2950          The first three are reserved.  */
2951       got_offset = (plt_index + 3) * 4;
2952
2953       /* Fill in the entry in the procedure linkage table.  */
2954       if (! info->shared)
2955         {
2956           memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
2957                   PLT_ENTRY_SIZE);
2958           bfd_put_32 (output_bfd,
2959                       (htab->sgotplt->output_section->vma
2960                        + htab->sgotplt->output_offset
2961                        + got_offset),
2962                       htab->splt->contents + h->plt.offset + 2);
2963         }
2964       else
2965         {
2966           memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
2967                   PLT_ENTRY_SIZE);
2968           bfd_put_32 (output_bfd, got_offset,
2969                       htab->splt->contents + h->plt.offset + 2);
2970         }
2971
2972       bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
2973                   htab->splt->contents + h->plt.offset + 7);
2974       bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
2975                   htab->splt->contents + h->plt.offset + 12);
2976
2977       /* Fill in the entry in the global offset table.  */
2978       bfd_put_32 (output_bfd,
2979                   (htab->splt->output_section->vma
2980                    + htab->splt->output_offset
2981                    + h->plt.offset
2982                    + 6),
2983                   htab->sgotplt->contents + got_offset);
2984
2985       /* Fill in the entry in the .rel.plt section.  */
2986       rel.r_offset = (htab->sgotplt->output_section->vma
2987                       + htab->sgotplt->output_offset
2988                       + got_offset);
2989       rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
2990       loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
2991       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
2992
2993       if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2994         {
2995           /* Mark the symbol as undefined, rather than as defined in
2996              the .plt section.  Leave the value if there were any
2997              relocations where pointer equality matters (this is a clue
2998              for the dynamic linker, to make function pointer
2999              comparisons work between an application and shared
3000              library), otherwise set it to zero.  If a function is only
3001              called from a binary, there is no need to slow down
3002              shared libraries because of that.  */
3003           sym->st_shndx = SHN_UNDEF;
3004           if ((h->elf_link_hash_flags & ELF_LINK_POINTER_EQUALITY_NEEDED) == 0)
3005             sym->st_value = 0;
3006         }
3007     }
3008
3009   if (h->got.offset != (bfd_vma) -1
3010       && elf_i386_hash_entry(h)->tls_type != GOT_TLS_GD
3011       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
3012     {
3013       Elf_Internal_Rela rel;
3014       bfd_byte *loc;
3015
3016       /* This symbol has an entry in the global offset table.  Set it
3017          up.  */
3018
3019       if (htab->sgot == NULL || htab->srelgot == NULL)
3020         abort ();
3021
3022       rel.r_offset = (htab->sgot->output_section->vma
3023                       + htab->sgot->output_offset
3024                       + (h->got.offset & ~(bfd_vma) 1));
3025
3026       /* If this is a static link, or it is a -Bsymbolic link and the
3027          symbol is defined locally or was forced to be local because
3028          of a version file, we just want to emit a RELATIVE reloc.
3029          The entry in the global offset table will already have been
3030          initialized in the relocate_section function.  */
3031       if (info->shared
3032           && SYMBOL_REFERENCES_LOCAL (info, h))
3033         {
3034           BFD_ASSERT((h->got.offset & 1) != 0);
3035           rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3036         }
3037       else
3038         {
3039           BFD_ASSERT((h->got.offset & 1) == 0);
3040           bfd_put_32 (output_bfd, (bfd_vma) 0,
3041                       htab->sgot->contents + h->got.offset);
3042           rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3043         }
3044
3045       loc = htab->srelgot->contents;
3046       loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3047       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3048     }
3049
3050   if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3051     {
3052       Elf_Internal_Rela rel;
3053       bfd_byte *loc;
3054
3055       /* This symbol needs a copy reloc.  Set it up.  */
3056
3057       if (h->dynindx == -1
3058           || (h->root.type != bfd_link_hash_defined
3059               && h->root.type != bfd_link_hash_defweak)
3060           || htab->srelbss == NULL)
3061         abort ();
3062
3063       rel.r_offset = (h->root.u.def.value
3064                       + h->root.u.def.section->output_section->vma
3065                       + h->root.u.def.section->output_offset);
3066       rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3067       loc = htab->srelbss->contents;
3068       loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
3069       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3070     }
3071
3072   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
3073   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3074       || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3075     sym->st_shndx = SHN_ABS;
3076
3077   return TRUE;
3078 }
3079
3080 /* Used to decide how to sort relocs in an optimal manner for the
3081    dynamic linker, before writing them out.  */
3082
3083 static enum elf_reloc_type_class
3084 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
3085 {
3086   switch (ELF32_R_TYPE (rela->r_info))
3087     {
3088     case R_386_RELATIVE:
3089       return reloc_class_relative;
3090     case R_386_JUMP_SLOT:
3091       return reloc_class_plt;
3092     case R_386_COPY:
3093       return reloc_class_copy;
3094     default:
3095       return reloc_class_normal;
3096     }
3097 }
3098
3099 /* Finish up the dynamic sections.  */
3100
3101 static bfd_boolean
3102 elf_i386_finish_dynamic_sections (bfd *output_bfd,
3103                                   struct bfd_link_info *info)
3104 {
3105   struct elf_i386_link_hash_table *htab;
3106   bfd *dynobj;
3107   asection *sdyn;
3108
3109   htab = elf_i386_hash_table (info);
3110   dynobj = htab->elf.dynobj;
3111   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3112
3113   if (htab->elf.dynamic_sections_created)
3114     {
3115       Elf32_External_Dyn *dyncon, *dynconend;
3116
3117       if (sdyn == NULL || htab->sgot == NULL)
3118         abort ();
3119
3120       dyncon = (Elf32_External_Dyn *) sdyn->contents;
3121       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3122       for (; dyncon < dynconend; dyncon++)
3123         {
3124           Elf_Internal_Dyn dyn;
3125           asection *s;
3126
3127           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3128
3129           switch (dyn.d_tag)
3130             {
3131             default:
3132               continue;
3133
3134             case DT_PLTGOT:
3135               dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3136               break;
3137
3138             case DT_JMPREL:
3139               s = htab->srelplt;
3140               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3141               break;
3142
3143             case DT_PLTRELSZ:
3144               s = htab->srelplt;
3145               dyn.d_un.d_val = s->_raw_size;
3146               break;
3147
3148             case DT_RELSZ:
3149               /* My reading of the SVR4 ABI indicates that the
3150                  procedure linkage table relocs (DT_JMPREL) should be
3151                  included in the overall relocs (DT_REL).  This is
3152                  what Solaris does.  However, UnixWare can not handle
3153                  that case.  Therefore, we override the DT_RELSZ entry
3154                  here to make it not include the JMPREL relocs.  */
3155               s = htab->srelplt;
3156               if (s == NULL)
3157                 continue;
3158               dyn.d_un.d_val -= s->_raw_size;
3159               break;
3160
3161             case DT_REL:
3162               /* We may not be using the standard ELF linker script.
3163                  If .rel.plt is the first .rel section, we adjust
3164                  DT_REL to not include it.  */
3165               s = htab->srelplt;
3166               if (s == NULL)
3167                 continue;
3168               if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3169                 continue;
3170               dyn.d_un.d_ptr += s->_raw_size;
3171               break;
3172             }
3173
3174           bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3175         }
3176
3177       /* Fill in the first entry in the procedure linkage table.  */
3178       if (htab->splt && htab->splt->_raw_size > 0)
3179         {
3180           if (info->shared)
3181             memcpy (htab->splt->contents,
3182                     elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
3183           else
3184             {
3185               memcpy (htab->splt->contents,
3186                       elf_i386_plt0_entry, PLT_ENTRY_SIZE);
3187               bfd_put_32 (output_bfd,
3188                           (htab->sgotplt->output_section->vma
3189                            + htab->sgotplt->output_offset
3190                            + 4),
3191                           htab->splt->contents + 2);
3192               bfd_put_32 (output_bfd,
3193                           (htab->sgotplt->output_section->vma
3194                            + htab->sgotplt->output_offset
3195                            + 8),
3196                           htab->splt->contents + 8);
3197             }
3198
3199           /* UnixWare sets the entsize of .plt to 4, although that doesn't
3200              really seem like the right value.  */
3201           elf_section_data (htab->splt->output_section)
3202             ->this_hdr.sh_entsize = 4;
3203         }
3204     }
3205
3206   if (htab->sgotplt)
3207     {
3208       /* Fill in the first three entries in the global offset table.  */
3209       if (htab->sgotplt->_raw_size > 0)
3210         {
3211           bfd_put_32 (output_bfd,
3212                       (sdyn == NULL ? 0
3213                        : sdyn->output_section->vma + sdyn->output_offset),
3214                       htab->sgotplt->contents);
3215           bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3216           bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
3217         }
3218
3219       elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3220     }
3221   return TRUE;
3222 }
3223
3224 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vec
3225 #define TARGET_LITTLE_NAME              "elf32-i386"
3226 #define ELF_ARCH                        bfd_arch_i386
3227 #define ELF_MACHINE_CODE                EM_386
3228 #define ELF_MAXPAGESIZE                 0x1000
3229
3230 #define elf_backend_can_gc_sections     1
3231 #define elf_backend_can_refcount        1
3232 #define elf_backend_want_got_plt        1
3233 #define elf_backend_plt_readonly        1
3234 #define elf_backend_want_plt_sym        0
3235 #define elf_backend_got_header_size     12
3236
3237 /* Support RELA for objdump of prelink objects.  */
3238 #define elf_info_to_howto                     elf_i386_info_to_howto_rel
3239 #define elf_info_to_howto_rel                 elf_i386_info_to_howto_rel
3240
3241 #define bfd_elf32_mkobject                    elf_i386_mkobject
3242
3243 #define bfd_elf32_bfd_is_local_label_name     elf_i386_is_local_label_name
3244 #define bfd_elf32_bfd_link_hash_table_create  elf_i386_link_hash_table_create
3245 #define bfd_elf32_bfd_reloc_type_lookup       elf_i386_reloc_type_lookup
3246
3247 #define elf_backend_adjust_dynamic_symbol     elf_i386_adjust_dynamic_symbol
3248 #define elf_backend_check_relocs              elf_i386_check_relocs
3249 #define elf_backend_copy_indirect_symbol      elf_i386_copy_indirect_symbol
3250 #define elf_backend_create_dynamic_sections   elf_i386_create_dynamic_sections
3251 #define elf_backend_fake_sections             elf_i386_fake_sections
3252 #define elf_backend_finish_dynamic_sections   elf_i386_finish_dynamic_sections
3253 #define elf_backend_finish_dynamic_symbol     elf_i386_finish_dynamic_symbol
3254 #define elf_backend_gc_mark_hook              elf_i386_gc_mark_hook
3255 #define elf_backend_gc_sweep_hook             elf_i386_gc_sweep_hook
3256 #define elf_backend_grok_prstatus             elf_i386_grok_prstatus
3257 #define elf_backend_grok_psinfo               elf_i386_grok_psinfo
3258 #define elf_backend_reloc_type_class          elf_i386_reloc_type_class
3259 #define elf_backend_relocate_section          elf_i386_relocate_section
3260 #define elf_backend_size_dynamic_sections     elf_i386_size_dynamic_sections
3261
3262 #include "elf32-target.h"
3263
3264 /* FreeBSD support.  */
3265
3266 #undef  TARGET_LITTLE_SYM
3267 #define TARGET_LITTLE_SYM               bfd_elf32_i386_freebsd_vec
3268 #undef  TARGET_LITTLE_NAME
3269 #define TARGET_LITTLE_NAME              "elf32-i386-freebsd"
3270
3271 /* The kernel recognizes executables as valid only if they carry a
3272    "FreeBSD" label in the ELF header.  So we put this label on all
3273    executables and (for simplicity) also all other object files.  */
3274
3275 static void
3276 elf_i386_post_process_headers (bfd *abfd,
3277                                struct bfd_link_info *info ATTRIBUTE_UNUSED)
3278 {
3279   Elf_Internal_Ehdr *i_ehdrp;
3280
3281   i_ehdrp = elf_elfheader (abfd);
3282
3283   /* Put an ABI label supported by FreeBSD >= 4.1.  */
3284   i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
3285 #ifdef OLD_FREEBSD_ABI_LABEL
3286   /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
3287   memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
3288 #endif
3289 }
3290
3291 #undef  elf_backend_post_process_headers
3292 #define elf_backend_post_process_headers        elf_i386_post_process_headers
3293 #undef  elf32_bed
3294 #define elf32_bed                               elf32_i386_fbsd_bed
3295
3296 #include "elf32-target.h"