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,
   3    2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "bfdlink.h"
  25 #include "libbfd.h"
  26 #include "elf-bfd.h"
  27 #include "elf-vxworks.h"
  28 #include "bfd_stdint.h"
  29 #include "objalloc.h"
  30 #include "hashtab.h"
  31
  32 /* 386 uses REL relocations instead of RELA.  */
  33 #define USE_REL 1
  34
  35 #include "elf/i386.h"
  36
  37 static reloc_howto_type elf_howto_table[]=
  38 {
  39   HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
  40         bfd_elf_generic_reloc, "R_386_NONE",
  41         TRUE, 0x00000000, 0x00000000, FALSE),
  42   HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  43         bfd_elf_generic_reloc, "R_386_32",
  44         TRUE, 0xffffffff, 0xffffffff, FALSE),
  45   HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  46         bfd_elf_generic_reloc, "R_386_PC32",
  47         TRUE, 0xffffffff, 0xffffffff, TRUE),
  48   HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  49         bfd_elf_generic_reloc, "R_386_GOT32",
  50         TRUE, 0xffffffff, 0xffffffff, FALSE),
  51   HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  52         bfd_elf_generic_reloc, "R_386_PLT32",
  53         TRUE, 0xffffffff, 0xffffffff, TRUE),
  54   HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  55         bfd_elf_generic_reloc, "R_386_COPY",
  56         TRUE, 0xffffffff, 0xffffffff, FALSE),
  57   HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  58         bfd_elf_generic_reloc, "R_386_GLOB_DAT",
  59         TRUE, 0xffffffff, 0xffffffff, FALSE),
  60   HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  61         bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
  62         TRUE, 0xffffffff, 0xffffffff, FALSE),
  63   HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  64         bfd_elf_generic_reloc, "R_386_RELATIVE",
  65         TRUE, 0xffffffff, 0xffffffff, FALSE),
  66   HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  67         bfd_elf_generic_reloc, "R_386_GOTOFF",
  68         TRUE, 0xffffffff, 0xffffffff, FALSE),
  69   HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  70         bfd_elf_generic_reloc, "R_386_GOTPC",
  71         TRUE, 0xffffffff, 0xffffffff, TRUE),
  72
  73   /* We have a gap in the reloc numbers here.
  74      R_386_standard counts the number up to this point, and
  75      R_386_ext_offset is the value to subtract from a reloc type of
  76      R_386_16 thru R_386_PC8 to form an index into this table.  */
  77 #define R_386_standard (R_386_GOTPC + 1)
  78 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
  79
  80   /* These relocs are a GNU extension.  */
  81   HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  82         bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
  83         TRUE, 0xffffffff, 0xffffffff, FALSE),
  84   HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  85         bfd_elf_generic_reloc, "R_386_TLS_IE",
  86         TRUE, 0xffffffff, 0xffffffff, FALSE),
  87   HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  88         bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
  89         TRUE, 0xffffffff, 0xffffffff, FALSE),
  90   HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  91         bfd_elf_generic_reloc, "R_386_TLS_LE",
  92         TRUE, 0xffffffff, 0xffffffff, FALSE),
  93   HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  94         bfd_elf_generic_reloc, "R_386_TLS_GD",
  95         TRUE, 0xffffffff, 0xffffffff, FALSE),
  96   HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  97         bfd_elf_generic_reloc, "R_386_TLS_LDM",
  98         TRUE, 0xffffffff, 0xffffffff, FALSE),
  99   HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 100         bfd_elf_generic_reloc, "R_386_16",
 101         TRUE, 0xffff, 0xffff, FALSE),
 102   HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
 103         bfd_elf_generic_reloc, "R_386_PC16",
 104         TRUE, 0xffff, 0xffff, TRUE),
 105   HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
 106         bfd_elf_generic_reloc, "R_386_8",
 107         TRUE, 0xff, 0xff, FALSE),
 108   HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
 109         bfd_elf_generic_reloc, "R_386_PC8",
 110         TRUE, 0xff, 0xff, TRUE),
 111
 112 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
 113 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
 114   /* These are common with Solaris TLS implementation.  */
 115   HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 116         bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
 117         TRUE, 0xffffffff, 0xffffffff, FALSE),
 118   HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 119         bfd_elf_generic_reloc, "R_386_TLS_IE_32",
 120         TRUE, 0xffffffff, 0xffffffff, FALSE),
 121   HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 122         bfd_elf_generic_reloc, "R_386_TLS_LE_32",
 123         TRUE, 0xffffffff, 0xffffffff, FALSE),
 124   HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 125         bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
 126         TRUE, 0xffffffff, 0xffffffff, FALSE),
 127   HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 128         bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
 129         TRUE, 0xffffffff, 0xffffffff, FALSE),
 130   HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 131         bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
 132         TRUE, 0xffffffff, 0xffffffff, FALSE),
 133   EMPTY_HOWTO (38),
 134   HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 135         bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
 136         TRUE, 0xffffffff, 0xffffffff, FALSE),
 137   HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 138         bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
 139         FALSE, 0, 0, FALSE),
 140   HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 141         bfd_elf_generic_reloc, "R_386_TLS_DESC",
 142         TRUE, 0xffffffff, 0xffffffff, FALSE),
 143   HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 144         bfd_elf_generic_reloc, "R_386_IRELATIVE",
 145         TRUE, 0xffffffff, 0xffffffff, FALSE),
 146
 147   /* Another gap.  */
 148 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
 149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
 150
 151 /* GNU extension to record C++ vtable hierarchy.  */
 152   HOWTO (R_386_GNU_VTINHERIT,   /* type */
 153          0,                     /* rightshift */
 154          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 155          0,                     /* bitsize */
 156          FALSE,                 /* pc_relative */
 157          0,                     /* bitpos */
 158          complain_overflow_dont, /* complain_on_overflow */
 159          NULL,                  /* special_function */
 160          "R_386_GNU_VTINHERIT", /* name */
 161          FALSE,                 /* partial_inplace */
 162          0,                     /* src_mask */
 163          0,                     /* dst_mask */
 164          FALSE),                /* pcrel_offset */
 165
 166 /* GNU extension to record C++ vtable member usage.  */
 167   HOWTO (R_386_GNU_VTENTRY,     /* type */
 168          0,                     /* rightshift */
 169          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 170          0,                     /* bitsize */
 171          FALSE,                 /* pc_relative */
 172          0,                     /* bitpos */
 173          complain_overflow_dont, /* complain_on_overflow */
 174          _bfd_elf_rel_vtable_reloc_fn, /* special_function */
 175          "R_386_GNU_VTENTRY",   /* name */
 176          FALSE,                 /* partial_inplace */
 177          0,                     /* src_mask */
 178          0,                     /* dst_mask */
 179          FALSE)                 /* pcrel_offset */
 180
 181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
 182
 183 };
 184
 185 #ifdef DEBUG_GEN_RELOC
 186 #define TRACE(str) \
 187   fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
 188 #else
 189 #define TRACE(str)
 190 #endif
 191
 192 static reloc_howto_type *
 193 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 194                             bfd_reloc_code_real_type code)
 195 {
 196   switch (code)
 197     {
 198     case BFD_RELOC_NONE:
 199       TRACE ("BFD_RELOC_NONE");
 200       return &elf_howto_table[R_386_NONE];
 201
 202     case BFD_RELOC_32:
 203       TRACE ("BFD_RELOC_32");
 204       return &elf_howto_table[R_386_32];
 205
 206     case BFD_RELOC_CTOR:
 207       TRACE ("BFD_RELOC_CTOR");
 208       return &elf_howto_table[R_386_32];
 209
 210     case BFD_RELOC_32_PCREL:
 211       TRACE ("BFD_RELOC_PC32");
 212       return &elf_howto_table[R_386_PC32];
 213
 214     case BFD_RELOC_386_GOT32:
 215       TRACE ("BFD_RELOC_386_GOT32");
 216       return &elf_howto_table[R_386_GOT32];
 217
 218     case BFD_RELOC_386_PLT32:
 219       TRACE ("BFD_RELOC_386_PLT32");
 220       return &elf_howto_table[R_386_PLT32];
 221
 222     case BFD_RELOC_386_COPY:
 223       TRACE ("BFD_RELOC_386_COPY");
 224       return &elf_howto_table[R_386_COPY];
 225
 226     case BFD_RELOC_386_GLOB_DAT:
 227       TRACE ("BFD_RELOC_386_GLOB_DAT");
 228       return &elf_howto_table[R_386_GLOB_DAT];
 229
 230     case BFD_RELOC_386_JUMP_SLOT:
 231       TRACE ("BFD_RELOC_386_JUMP_SLOT");
 232       return &elf_howto_table[R_386_JUMP_SLOT];
 233
 234     case BFD_RELOC_386_RELATIVE:
 235       TRACE ("BFD_RELOC_386_RELATIVE");
 236       return &elf_howto_table[R_386_RELATIVE];
 237
 238     case BFD_RELOC_386_GOTOFF:
 239       TRACE ("BFD_RELOC_386_GOTOFF");
 240       return &elf_howto_table[R_386_GOTOFF];
 241
 242     case BFD_RELOC_386_GOTPC:
 243       TRACE ("BFD_RELOC_386_GOTPC");
 244       return &elf_howto_table[R_386_GOTPC];
 245
 246       /* These relocs are a GNU extension.  */
 247     case BFD_RELOC_386_TLS_TPOFF:
 248       TRACE ("BFD_RELOC_386_TLS_TPOFF");
 249       return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
 250
 251     case BFD_RELOC_386_TLS_IE:
 252       TRACE ("BFD_RELOC_386_TLS_IE");
 253       return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
 254
 255     case BFD_RELOC_386_TLS_GOTIE:
 256       TRACE ("BFD_RELOC_386_TLS_GOTIE");
 257       return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
 258
 259     case BFD_RELOC_386_TLS_LE:
 260       TRACE ("BFD_RELOC_386_TLS_LE");
 261       return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
 262
 263     case BFD_RELOC_386_TLS_GD:
 264       TRACE ("BFD_RELOC_386_TLS_GD");
 265       return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
 266
 267     case BFD_RELOC_386_TLS_LDM:
 268       TRACE ("BFD_RELOC_386_TLS_LDM");
 269       return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
 270
 271     case BFD_RELOC_16:
 272       TRACE ("BFD_RELOC_16");
 273       return &elf_howto_table[R_386_16 - R_386_ext_offset];
 274
 275     case BFD_RELOC_16_PCREL:
 276       TRACE ("BFD_RELOC_16_PCREL");
 277       return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
 278
 279     case BFD_RELOC_8:
 280       TRACE ("BFD_RELOC_8");
 281       return &elf_howto_table[R_386_8 - R_386_ext_offset];
 282
 283     case BFD_RELOC_8_PCREL:
 284       TRACE ("BFD_RELOC_8_PCREL");
 285       return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
 286
 287     /* Common with Sun TLS implementation.  */
 288     case BFD_RELOC_386_TLS_LDO_32:
 289       TRACE ("BFD_RELOC_386_TLS_LDO_32");
 290       return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
 291
 292     case BFD_RELOC_386_TLS_IE_32:
 293       TRACE ("BFD_RELOC_386_TLS_IE_32");
 294       return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
 295
 296     case BFD_RELOC_386_TLS_LE_32:
 297       TRACE ("BFD_RELOC_386_TLS_LE_32");
 298       return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
 299
 300     case BFD_RELOC_386_TLS_DTPMOD32:
 301       TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
 302       return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
 303
 304     case BFD_RELOC_386_TLS_DTPOFF32:
 305       TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
 306       return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
 307
 308     case BFD_RELOC_386_TLS_TPOFF32:
 309       TRACE ("BFD_RELOC_386_TLS_TPOFF32");
 310       return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
 311
 312     case BFD_RELOC_386_TLS_GOTDESC:
 313       TRACE ("BFD_RELOC_386_TLS_GOTDESC");
 314       return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
 315
 316     case BFD_RELOC_386_TLS_DESC_CALL:
 317       TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
 318       return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
 319
 320     case BFD_RELOC_386_TLS_DESC:
 321       TRACE ("BFD_RELOC_386_TLS_DESC");
 322       return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
 323
 324     case BFD_RELOC_386_IRELATIVE:
 325       TRACE ("BFD_RELOC_386_IRELATIVE");
 326       return &elf_howto_table[R_386_IRELATIVE];
 327
 328     case BFD_RELOC_VTABLE_INHERIT:
 329       TRACE ("BFD_RELOC_VTABLE_INHERIT");
 330       return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
 331
 332     case BFD_RELOC_VTABLE_ENTRY:
 333       TRACE ("BFD_RELOC_VTABLE_ENTRY");
 334       return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
 335
 336     default:
 337       break;
 338     }
 339
 340   TRACE ("Unknown");
 341   return 0;
 342 }
 343
 344 static reloc_howto_type *
 345 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 346                             const char *r_name)
 347 {
 348   unsigned int i;
 349
 350   for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
 351     if (elf_howto_table[i].name != NULL
 352         && strcasecmp (elf_howto_table[i].name, r_name) == 0)
 353       return &elf_howto_table[i];
 354
 355   return NULL;
 356 }
 357
 358 static reloc_howto_type *
 359 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
 360 {
 361   unsigned int indx;
 362
 363   if ((indx = r_type) >= R_386_standard
 364       && ((indx = r_type - R_386_ext_offset) - R_386_standard
 365           >= R_386_ext - R_386_standard)
 366       && ((indx = r_type - R_386_tls_offset) - R_386_ext
 367           >= R_386_irelative - R_386_ext)
 368       && ((indx = r_type - R_386_vt_offset) - R_386_irelative
 369           >= R_386_vt - R_386_irelative))
 370     {
 371       (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
 372                              abfd, (int) r_type);
 373       indx = R_386_NONE;
 374     }
 375   BFD_ASSERT (elf_howto_table [indx].type == r_type);
 376   return &elf_howto_table[indx];
 377 }
 378
 379 static void
 380 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
 381                             arelent *cache_ptr,
 382                             Elf_Internal_Rela *dst)
 383 {
 384   unsigned int r_type = ELF32_R_TYPE (dst->r_info);
 385   cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
 386 }
 387
 388 /* Return whether a symbol name implies a local label.  The UnixWare
 389    2.1 cc generates temporary symbols that start with .X, so we
 390    recognize them here.  FIXME: do other SVR4 compilers also use .X?.
 391    If so, we should move the .X recognition into
 392    _bfd_elf_is_local_label_name.  */
 393
 394 static bfd_boolean
 395 elf_i386_is_local_label_name (bfd *abfd, const char *name)
 396 {
 397   if (name[0] == '.' && name[1] == 'X')
 398     return TRUE;
 399
 400   return _bfd_elf_is_local_label_name (abfd, name);
 401 }
 402 \f
 403 /* Support for core dump NOTE sections.  */
 404
 405 static bfd_boolean
 406 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
 407 {
 408   int offset;
 409   size_t size;
 410
 411   if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
 412     {
 413       int pr_version = bfd_get_32 (abfd, note->descdata);
 414
 415       if (pr_version != 1)
 416         return FALSE;
 417
 418       /* pr_cursig */
 419       elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
 420
 421       /* pr_pid */
 422       elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
 423
 424       /* pr_reg */
 425       offset = 28;
 426       size = bfd_get_32 (abfd, note->descdata + 8);
 427     }
 428   else
 429     {
 430       switch (note->descsz)
 431         {
 432         default:
 433           return FALSE;
 434
 435         case 144:               /* Linux/i386 */
 436           /* pr_cursig */
 437           elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
 438
 439           /* pr_pid */
 440           elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
 441
 442           /* pr_reg */
 443           offset = 72;
 444           size = 68;
 445
 446           break;
 447         }
 448     }
 449
 450   /* Make a ".reg/999" section.  */
 451   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
 452                                           size, note->descpos + offset);
 453 }
 454
 455 static bfd_boolean
 456 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
 457 {
 458   if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
 459     {
 460       int pr_version = bfd_get_32 (abfd, note->descdata);
 461
 462       if (pr_version != 1)
 463         return FALSE;
 464
 465       elf_tdata (abfd)->core_program
 466         = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
 467       elf_tdata (abfd)->core_command
 468         = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
 469     }
 470   else
 471     {
 472       switch (note->descsz)
 473         {
 474         default:
 475           return FALSE;
 476
 477         case 124:               /* Linux/i386 elf_prpsinfo.  */
 478           elf_tdata (abfd)->core_program
 479             = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 480           elf_tdata (abfd)->core_command
 481             = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 482         }
 483     }
 484
 485   /* Note that for some reason, a spurious space is tacked
 486      onto the end of the args in some (at least one anyway)
 487      implementations, so strip it off if it exists.  */
 488   {
 489     char *command = elf_tdata (abfd)->core_command;
 490     int n = strlen (command);
 491
 492     if (0 < n && command[n - 1] == ' ')
 493       command[n - 1] = '\0';
 494   }
 495
 496   return TRUE;
 497 }
 498 \f
 499 /* Functions for the i386 ELF linker.
 500
 501    In order to gain some understanding of code in this file without
 502    knowing all the intricate details of the linker, note the
 503    following:
 504
 505    Functions named elf_i386_* are called by external routines, other
 506    functions are only called locally.  elf_i386_* functions appear
 507    in this file more or less in the order in which they are called
 508    from external routines.  eg. elf_i386_check_relocs is called
 509    early in the link process, elf_i386_finish_dynamic_sections is
 510    one of the last functions.  */
 511
 512
 513 /* The name of the dynamic interpreter.  This is put in the .interp
 514    section.  */
 515
 516 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
 517
 518 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
 519    copying dynamic variables from a shared lib into an app's dynbss
 520    section, and instead use a dynamic relocation to point into the
 521    shared lib.  */
 522 #define ELIMINATE_COPY_RELOCS 1
 523
 524 /* The size in bytes of an entry in the procedure linkage table.  */
 525
 526 #define PLT_ENTRY_SIZE 16
 527
 528 /* The first entry in an absolute procedure linkage table looks like
 529    this.  See the SVR4 ABI i386 supplement to see how this works.
 530    Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte.  */
 531
 532 static const bfd_byte elf_i386_plt0_entry[12] =
 533 {
 534   0xff, 0x35,   /* pushl contents of address */
 535   0, 0, 0, 0,   /* replaced with address of .got + 4.  */
 536   0xff, 0x25,   /* jmp indirect */
 537   0, 0, 0, 0    /* replaced with address of .got + 8.  */
 538 };
 539
 540 /* Subsequent entries in an absolute procedure linkage table look like
 541    this.  */
 542
 543 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
 544 {
 545   0xff, 0x25,   /* jmp indirect */
 546   0, 0, 0, 0,   /* replaced with address of this symbol in .got.  */
 547   0x68,         /* pushl immediate */
 548   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 549   0xe9,         /* jmp relative */
 550   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 551 };
 552
 553 /* The first entry in a PIC procedure linkage table look like this.
 554    Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte.  */
 555
 556 static const bfd_byte elf_i386_pic_plt0_entry[12] =
 557 {
 558   0xff, 0xb3, 4, 0, 0, 0,       /* pushl 4(%ebx) */
 559   0xff, 0xa3, 8, 0, 0, 0        /* jmp *8(%ebx) */
 560 };
 561
 562 /* Subsequent entries in a PIC procedure linkage table look like this.  */
 563
 564 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
 565 {
 566   0xff, 0xa3,   /* jmp *offset(%ebx) */
 567   0, 0, 0, 0,   /* replaced with offset of this symbol in .got.  */
 568   0x68,         /* pushl immediate */
 569   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 570   0xe9,         /* jmp relative */
 571   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 572 };
 573
 574 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
 575    for the PLTResolve stub and then for each PLT entry.  */
 576 #define PLTRESOLVE_RELOCS_SHLIB 0
 577 #define PLTRESOLVE_RELOCS 2
 578 #define PLT_NON_JUMP_SLOT_RELOCS 2
 579
 580 /* i386 ELF linker hash entry.  */
 581
 582 struct elf_i386_link_hash_entry
 583 {
 584   struct elf_link_hash_entry elf;
 585
 586   /* Track dynamic relocs copied for this symbol.  */
 587   struct elf_dyn_relocs *dyn_relocs;
 588
 589 #define GOT_UNKNOWN     0
 590 #define GOT_NORMAL      1
 591 #define GOT_TLS_GD      2
 592 #define GOT_TLS_IE      4
 593 #define GOT_TLS_IE_POS  5
 594 #define GOT_TLS_IE_NEG  6
 595 #define GOT_TLS_IE_BOTH 7
 596 #define GOT_TLS_GDESC   8
 597 #define GOT_TLS_GD_BOTH_P(type)                                         \
 598   ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
 599 #define GOT_TLS_GD_P(type)                                              \
 600   ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
 601 #define GOT_TLS_GDESC_P(type)                                           \
 602   ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
 603 #define GOT_TLS_GD_ANY_P(type)                                          \
 604   (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
 605   unsigned char tls_type;
 606
 607   /* Offset of the GOTPLT entry reserved for the TLS descriptor,
 608      starting at the end of the jump table.  */
 609   bfd_vma tlsdesc_got;
 610 };
 611
 612 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
 613
 614 struct elf_i386_obj_tdata
 615 {
 616   struct elf_obj_tdata root;
 617
 618   /* tls_type for each local got entry.  */
 619   char *local_got_tls_type;
 620
 621   /* GOTPLT entries for TLS descriptors.  */
 622   bfd_vma *local_tlsdesc_gotent;
 623 };
 624
 625 #define elf_i386_tdata(abfd) \
 626   ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
 627
 628 #define elf_i386_local_got_tls_type(abfd) \
 629   (elf_i386_tdata (abfd)->local_got_tls_type)
 630
 631 #define elf_i386_local_tlsdesc_gotent(abfd) \
 632   (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
 633
 634 #define is_i386_elf(bfd)                                \
 635   (bfd_get_flavour (bfd) == bfd_target_elf_flavour      \
 636    && elf_tdata (bfd) != NULL                           \
 637    && elf_object_id (bfd) == I386_ELF_DATA)
 638
 639 static bfd_boolean
 640 elf_i386_mkobject (bfd *abfd)
 641 {
 642   return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
 643                                   I386_ELF_DATA);
 644 }
 645
 646 /* i386 ELF linker hash table.  */
 647
 648 struct elf_i386_link_hash_table
 649 {
 650   struct elf_link_hash_table elf;
 651
 652   /* Short-cuts to get to dynamic linker sections.  */
 653   asection *sdynbss;
 654   asection *srelbss;
 655
 656   union
 657   {
 658     bfd_signed_vma refcount;
 659     bfd_vma offset;
 660   } tls_ldm_got;
 661
 662   /* The amount of space used by the reserved portion of the sgotplt
 663      section, plus whatever space is used by the jump slots.  */
 664   bfd_vma sgotplt_jump_table_size;
 665
 666   /* Small local sym cache.  */
 667   struct sym_cache sym_cache;
 668
 669   /* _TLS_MODULE_BASE_ symbol.  */
 670   struct bfd_link_hash_entry *tls_module_base;
 671
 672   /* Used by local STT_GNU_IFUNC symbols.  */
 673   htab_t loc_hash_table;
 674   void * loc_hash_memory;
 675
 676   /* The (unloaded but important) .rel.plt.unloaded section on VxWorks.  */
 677   asection *srelplt2;
 678
 679   /* True if the target system is VxWorks.  */
 680   int is_vxworks;
 681
 682   /* The index of the next unused R_386_TLS_DESC slot in .rel.plt.  */
 683   bfd_vma next_tls_desc_index;
 684
 685   /* Value used to fill the last word of the first plt entry.  */
 686   bfd_byte plt0_pad_byte;
 687 };
 688
 689 /* Get the i386 ELF linker hash table from a link_info structure.  */
 690
 691 #define elf_i386_hash_table(p) \
 692   (elf_hash_table_id  ((struct elf_link_hash_table *) ((p)->hash)) \
 693   == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
 694
 695 #define elf_i386_compute_jump_table_size(htab) \
 696   ((htab)->next_tls_desc_index * 4)
 697
 698 /* Create an entry in an i386 ELF linker hash table.  */
 699
 700 static struct bfd_hash_entry *
 701 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
 702                             struct bfd_hash_table *table,
 703                             const char *string)
 704 {
 705   /* Allocate the structure if it has not already been allocated by a
 706      subclass.  */
 707   if (entry == NULL)
 708     {
 709       entry = (struct bfd_hash_entry *)
 710           bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
 711       if (entry == NULL)
 712         return entry;
 713     }
 714
 715   /* Call the allocation method of the superclass.  */
 716   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 717   if (entry != NULL)
 718     {
 719       struct elf_i386_link_hash_entry *eh;
 720
 721       eh = (struct elf_i386_link_hash_entry *) entry;
 722       eh->dyn_relocs = NULL;
 723       eh->tls_type = GOT_UNKNOWN;
 724       eh->tlsdesc_got = (bfd_vma) -1;
 725     }
 726
 727   return entry;
 728 }
 729
 730 /* Compute a hash of a local hash entry.  We use elf_link_hash_entry
 731   for local symbol so that we can handle local STT_GNU_IFUNC symbols
 732   as global symbol.  We reuse indx and dynstr_index for local symbol
 733   hash since they aren't used by global symbols in this backend.  */
 734
 735 static hashval_t
 736 elf_i386_local_htab_hash (const void *ptr)
 737 {
 738   struct elf_link_hash_entry *h
 739     = (struct elf_link_hash_entry *) ptr;
 740   return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
 741 }
 742
 743 /* Compare local hash entries.  */
 744
 745 static int
 746 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
 747 {
 748   struct elf_link_hash_entry *h1
 749      = (struct elf_link_hash_entry *) ptr1;
 750   struct elf_link_hash_entry *h2
 751     = (struct elf_link_hash_entry *) ptr2;
 752
 753   return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
 754 }
 755
 756 /* Find and/or create a hash entry for local symbol.  */
 757
 758 static struct elf_link_hash_entry *
 759 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
 760                              bfd *abfd, const Elf_Internal_Rela *rel,
 761                              bfd_boolean create)
 762 {
 763   struct elf_i386_link_hash_entry e, *ret;
 764   asection *sec = abfd->sections;
 765   hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
 766                                        ELF32_R_SYM (rel->r_info));
 767   void **slot;
 768
 769   e.elf.indx = sec->id;
 770   e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
 771   slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
 772                                    create ? INSERT : NO_INSERT);
 773
 774   if (!slot)
 775     return NULL;
 776
 777   if (*slot)
 778     {
 779       ret = (struct elf_i386_link_hash_entry *) *slot;
 780       return &ret->elf;
 781     }
 782
 783   ret = (struct elf_i386_link_hash_entry *)
 784         objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
 785                         sizeof (struct elf_i386_link_hash_entry));
 786   if (ret)
 787     {
 788       memset (ret, 0, sizeof (*ret));
 789       ret->elf.indx = sec->id;
 790       ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
 791       ret->elf.dynindx = -1;
 792       ret->elf.plt.offset = (bfd_vma) -1;
 793       ret->elf.got.offset = (bfd_vma) -1;
 794       *slot = ret;
 795     }
 796   return &ret->elf;
 797 }
 798
 799 /* Create an i386 ELF linker hash table.  */
 800
 801 static struct bfd_link_hash_table *
 802 elf_i386_link_hash_table_create (bfd *abfd)
 803 {
 804   struct elf_i386_link_hash_table *ret;
 805   bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
 806
 807   ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt);
 808   if (ret == NULL)
 809     return NULL;
 810
 811   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
 812                                       elf_i386_link_hash_newfunc,
 813                                       sizeof (struct elf_i386_link_hash_entry),
 814                                       I386_ELF_DATA))
 815     {
 816       free (ret);
 817       return NULL;
 818     }
 819
 820   ret->sdynbss = NULL;
 821   ret->srelbss = NULL;
 822   ret->tls_ldm_got.refcount = 0;
 823   ret->next_tls_desc_index = 0;
 824   ret->sgotplt_jump_table_size = 0;
 825   ret->sym_cache.abfd = NULL;
 826   ret->is_vxworks = 0;
 827   ret->srelplt2 = NULL;
 828   ret->plt0_pad_byte = 0;
 829   ret->tls_module_base = NULL;
 830
 831   ret->loc_hash_table = htab_try_create (1024,
 832                                          elf_i386_local_htab_hash,
 833                                          elf_i386_local_htab_eq,
 834                                          NULL);
 835   ret->loc_hash_memory = objalloc_create ();
 836   if (!ret->loc_hash_table || !ret->loc_hash_memory)
 837     {
 838       free (ret);
 839       return NULL;
 840     }
 841
 842   return &ret->elf.root;
 843 }
 844
 845 /* Destroy an i386 ELF linker hash table.  */
 846
 847 static void
 848 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
 849 {
 850   struct elf_i386_link_hash_table *htab
 851     = (struct elf_i386_link_hash_table *) hash;
 852
 853   if (htab->loc_hash_table)
 854     htab_delete (htab->loc_hash_table);
 855   if (htab->loc_hash_memory)
 856     objalloc_free ((struct objalloc *) htab->loc_hash_memory);
 857   _bfd_generic_link_hash_table_free (hash);
 858 }
 859
 860 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
 861    .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
 862    hash table.  */
 863
 864 static bfd_boolean
 865 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
 866 {
 867   struct elf_i386_link_hash_table *htab;
 868
 869   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 870     return FALSE;
 871
 872   htab = elf_i386_hash_table (info);
 873   if (htab == NULL)
 874     return FALSE;
 875
 876   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 877   if (!info->shared)
 878     htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
 879
 880   if (!htab->sdynbss
 881       || (!info->shared && !htab->srelbss))
 882     abort ();
 883
 884   if (htab->is_vxworks
 885       && !elf_vxworks_create_dynamic_sections (dynobj, info,
 886                                                &htab->srelplt2))
 887     return FALSE;
 888
 889   return TRUE;
 890 }
 891
 892 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 893
 894 static void
 895 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
 896                                struct elf_link_hash_entry *dir,
 897                                struct elf_link_hash_entry *ind)
 898 {
 899   struct elf_i386_link_hash_entry *edir, *eind;
 900
 901   edir = (struct elf_i386_link_hash_entry *) dir;
 902   eind = (struct elf_i386_link_hash_entry *) ind;
 903
 904   if (eind->dyn_relocs != NULL)
 905     {
 906       if (edir->dyn_relocs != NULL)
 907         {
 908           struct elf_dyn_relocs **pp;
 909           struct elf_dyn_relocs *p;
 910
 911           /* Add reloc counts against the indirect sym to the direct sym
 912              list.  Merge any entries against the same section.  */
 913           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 914             {
 915               struct elf_dyn_relocs *q;
 916
 917               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 918                 if (q->sec == p->sec)
 919                   {
 920                     q->pc_count += p->pc_count;
 921                     q->count += p->count;
 922                     *pp = p->next;
 923                     break;
 924                   }
 925               if (q == NULL)
 926                 pp = &p->next;
 927             }
 928           *pp = edir->dyn_relocs;
 929         }
 930
 931       edir->dyn_relocs = eind->dyn_relocs;
 932       eind->dyn_relocs = NULL;
 933     }
 934
 935   if (ind->root.type == bfd_link_hash_indirect
 936       && dir->got.refcount <= 0)
 937     {
 938       edir->tls_type = eind->tls_type;
 939       eind->tls_type = GOT_UNKNOWN;
 940     }
 941
 942   if (ELIMINATE_COPY_RELOCS
 943       && ind->root.type != bfd_link_hash_indirect
 944       && dir->dynamic_adjusted)
 945     {
 946       /* If called to transfer flags for a weakdef during processing
 947          of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 948          We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 949       dir->ref_dynamic |= ind->ref_dynamic;
 950       dir->ref_regular |= ind->ref_regular;
 951       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
 952       dir->needs_plt |= ind->needs_plt;
 953       dir->pointer_equality_needed |= ind->pointer_equality_needed;
 954     }
 955   else
 956     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 957 }
 958
 959 typedef union
 960   {
 961     unsigned char c[2];
 962     uint16_t i;
 963   }
 964 i386_opcode16;
 965
 966 /* Return TRUE if the TLS access code sequence support transition
 967    from R_TYPE.  */
 968
 969 static bfd_boolean
 970 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
 971                                bfd_byte *contents,
 972                                Elf_Internal_Shdr *symtab_hdr,
 973                                struct elf_link_hash_entry **sym_hashes,
 974                                unsigned int r_type,
 975                                const Elf_Internal_Rela *rel,
 976                                const Elf_Internal_Rela *relend)
 977 {
 978   unsigned int val, type;
 979   unsigned long r_symndx;
 980   struct elf_link_hash_entry *h;
 981   bfd_vma offset;
 982
 983   /* Get the section contents.  */
 984   if (contents == NULL)
 985     {
 986       if (elf_section_data (sec)->this_hdr.contents != NULL)
 987         contents = elf_section_data (sec)->this_hdr.contents;
 988       else
 989         {
 990           /* FIXME: How to better handle error condition?  */
 991           if (!bfd_malloc_and_get_section (abfd, sec, &contents))
 992             return FALSE;
 993
 994           /* Cache the section contents for elf_link_input_bfd.  */
 995           elf_section_data (sec)->this_hdr.contents = contents;
 996         }
 997     }
 998
 999   offset = rel->r_offset;
1000   switch (r_type)
1001     {
1002     case R_386_TLS_GD:
1003     case R_386_TLS_LDM:
1004       if (offset < 2 || (rel + 1) >= relend)
1005         return FALSE;
1006
1007       type = bfd_get_8 (abfd, contents + offset - 2);
1008       if (r_type == R_386_TLS_GD)
1009         {
1010           /* Check transition from GD access model.  Only
1011                 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1012                 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1013              can transit to different access model.  */
1014           if ((offset + 10) > sec->size ||
1015               (type != 0x8d && type != 0x04))
1016             return FALSE;
1017
1018           val = bfd_get_8 (abfd, contents + offset - 1);
1019           if (type == 0x04)
1020             {
1021               /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1022               if (offset < 3)
1023                 return FALSE;
1024
1025               if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1026                 return FALSE;
1027
1028               if ((val & 0xc7) != 0x05 || val == (4 << 3))
1029                 return FALSE;
1030             }
1031           else
1032             {
1033               /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop  */
1034               if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1035                 return FALSE;
1036
1037               if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1038                 return FALSE;
1039             }
1040         }
1041       else
1042         {
1043           /* Check transition from LD access model.  Only
1044                 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1045              can transit to different access model.  */
1046           if (type != 0x8d || (offset + 9) > sec->size)
1047             return FALSE;
1048
1049           val = bfd_get_8 (abfd, contents + offset - 1);
1050           if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1051             return FALSE;
1052         }
1053
1054       if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1055         return FALSE;
1056
1057       r_symndx = ELF32_R_SYM (rel[1].r_info);
1058       if (r_symndx < symtab_hdr->sh_info)
1059         return FALSE;
1060
1061       h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1062       /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1063          may be versioned.  */
1064       return (h != NULL
1065               && h->root.root.string != NULL
1066               && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1067                   || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1068               && (strncmp (h->root.root.string, "___tls_get_addr",
1069                            15) == 0));
1070
1071     case R_386_TLS_IE:
1072       /* Check transition from IE access model:
1073                 movl foo@indntpoff(%rip), %eax
1074                 movl foo@indntpoff(%rip), %reg
1075                 addl foo@indntpoff(%rip), %reg
1076        */
1077
1078       if (offset < 1 || (offset + 4) > sec->size)
1079         return FALSE;
1080
1081       /* Check "movl foo@tpoff(%rip), %eax" first.  */
1082       val = bfd_get_8 (abfd, contents + offset - 1);
1083       if (val == 0xa1)
1084         return TRUE;
1085
1086       if (offset < 2)
1087         return FALSE;
1088
1089       /* Check movl|addl foo@tpoff(%rip), %reg.   */
1090       type = bfd_get_8 (abfd, contents + offset - 2);
1091       return ((type == 0x8b || type == 0x03)
1092               && (val & 0xc7) == 0x05);
1093
1094     case R_386_TLS_GOTIE:
1095     case R_386_TLS_IE_32:
1096       /* Check transition from {IE_32,GOTIE} access model:
1097                 subl foo@{tpoff,gontoff}(%reg1), %reg2
1098                 movl foo@{tpoff,gontoff}(%reg1), %reg2
1099                 addl foo@{tpoff,gontoff}(%reg1), %reg2
1100        */
1101
1102       if (offset < 2 || (offset + 4) > sec->size)
1103         return FALSE;
1104
1105       val = bfd_get_8 (abfd, contents + offset - 1);
1106       if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1107         return FALSE;
1108
1109       type = bfd_get_8 (abfd, contents + offset - 2);
1110       return type == 0x8b || type == 0x2b || type == 0x03;
1111
1112     case R_386_TLS_GOTDESC:
1113       /* Check transition from GDesc access model:
1114                 leal x@tlsdesc(%ebx), %eax
1115
1116          Make sure it's a leal adding ebx to a 32-bit offset
1117          into any register, although it's probably almost always
1118          going to be eax.  */
1119
1120       if (offset < 2 || (offset + 4) > sec->size)
1121         return FALSE;
1122
1123       if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1124         return FALSE;
1125
1126       val = bfd_get_8 (abfd, contents + offset - 1);
1127       return (val & 0xc7) == 0x83;
1128
1129     case R_386_TLS_DESC_CALL:
1130       /* Check transition from GDesc access model:
1131                 call *x@tlsdesc(%rax)
1132        */
1133       if (offset + 2 <= sec->size)
1134         {
1135           /* Make sure that it's a call *x@tlsdesc(%rax).  */
1136           static i386_opcode16 call = { { 0xff, 0x10 } };
1137           return bfd_get_16 (abfd, contents + offset) == call.i;
1138         }
1139
1140       return FALSE;
1141
1142     default:
1143       abort ();
1144     }
1145 }
1146
1147 /* Return TRUE if the TLS access transition is OK or no transition
1148    will be performed.  Update R_TYPE if there is a transition.  */
1149
1150 static bfd_boolean
1151 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1152                          asection *sec, bfd_byte *contents,
1153                          Elf_Internal_Shdr *symtab_hdr,
1154                          struct elf_link_hash_entry **sym_hashes,
1155                          unsigned int *r_type, int tls_type,
1156                          const Elf_Internal_Rela *rel,
1157                          const Elf_Internal_Rela *relend,
1158                          struct elf_link_hash_entry *h,
1159                          unsigned long r_symndx)
1160 {
1161   unsigned int from_type = *r_type;
1162   unsigned int to_type = from_type;
1163   bfd_boolean check = TRUE;
1164
1165   switch (from_type)
1166     {
1167     case R_386_TLS_GD:
1168     case R_386_TLS_GOTDESC:
1169     case R_386_TLS_DESC_CALL:
1170     case R_386_TLS_IE_32:
1171     case R_386_TLS_IE:
1172     case R_386_TLS_GOTIE:
1173       if (info->executable)
1174         {
1175           if (h == NULL)
1176             to_type = R_386_TLS_LE_32;
1177           else if (from_type != R_386_TLS_IE
1178                    && from_type != R_386_TLS_GOTIE)
1179             to_type = R_386_TLS_IE_32;
1180         }
1181
1182       /* When we are called from elf_i386_relocate_section, CONTENTS
1183          isn't NULL and there may be additional transitions based on
1184          TLS_TYPE.  */
1185       if (contents != NULL)
1186         {
1187           unsigned int new_to_type = to_type;
1188
1189           if (info->executable
1190               && h != NULL
1191               && h->dynindx == -1
1192               && (tls_type & GOT_TLS_IE))
1193             new_to_type = R_386_TLS_LE_32;
1194
1195           if (to_type == R_386_TLS_GD
1196               || to_type == R_386_TLS_GOTDESC
1197               || to_type == R_386_TLS_DESC_CALL)
1198             {
1199               if (tls_type == GOT_TLS_IE_POS)
1200                 new_to_type = R_386_TLS_GOTIE;
1201               else if (tls_type & GOT_TLS_IE)
1202                 new_to_type = R_386_TLS_IE_32;
1203             }
1204
1205           /* We checked the transition before when we were called from
1206              elf_i386_check_relocs.  We only want to check the new
1207              transition which hasn't been checked before.  */
1208           check = new_to_type != to_type && from_type == to_type;
1209           to_type = new_to_type;
1210         }
1211
1212       break;
1213
1214     case R_386_TLS_LDM:
1215       if (info->executable)
1216         to_type = R_386_TLS_LE_32;
1217       break;
1218
1219     default:
1220       return TRUE;
1221     }
1222
1223   /* Return TRUE if there is no transition.  */
1224   if (from_type == to_type)
1225     return TRUE;
1226
1227   /* Check if the transition can be performed.  */
1228   if (check
1229       && ! elf_i386_check_tls_transition (abfd, sec, contents,
1230                                           symtab_hdr, sym_hashes,
1231                                           from_type, rel, relend))
1232     {
1233       reloc_howto_type *from, *to;
1234       const char *name;
1235
1236       from = elf_i386_rtype_to_howto (abfd, from_type);
1237       to = elf_i386_rtype_to_howto (abfd, to_type);
1238
1239       if (h)
1240         name = h->root.root.string;
1241       else
1242         {
1243           struct elf_i386_link_hash_table *htab;
1244
1245           htab = elf_i386_hash_table (info);
1246           if (htab == NULL)
1247             name = "*unknown*";
1248           else
1249             {
1250               Elf_Internal_Sym *isym;
1251
1252               isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1253                                             abfd, r_symndx);
1254               name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1255             }
1256         }
1257
1258       (*_bfd_error_handler)
1259         (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1260            "in section `%A' failed"),
1261          abfd, sec, from->name, to->name, name,
1262          (unsigned long) rel->r_offset);
1263       bfd_set_error (bfd_error_bad_value);
1264       return FALSE;
1265     }
1266
1267   *r_type = to_type;
1268   return TRUE;
1269 }
1270
1271 /* Look through the relocs for a section during the first phase, and
1272    calculate needed space in the global offset table, procedure linkage
1273    table, and dynamic reloc sections.  */
1274
1275 static bfd_boolean
1276 elf_i386_check_relocs (bfd *abfd,
1277                        struct bfd_link_info *info,
1278                        asection *sec,
1279                        const Elf_Internal_Rela *relocs)
1280 {
1281   struct elf_i386_link_hash_table *htab;
1282   Elf_Internal_Shdr *symtab_hdr;
1283   struct elf_link_hash_entry **sym_hashes;
1284   const Elf_Internal_Rela *rel;
1285   const Elf_Internal_Rela *rel_end;
1286   asection *sreloc;
1287
1288   if (info->relocatable)
1289     return TRUE;
1290
1291   BFD_ASSERT (is_i386_elf (abfd));
1292
1293   htab = elf_i386_hash_table (info);
1294   if (htab == NULL)
1295     return FALSE;
1296
1297   symtab_hdr = &elf_symtab_hdr (abfd);
1298   sym_hashes = elf_sym_hashes (abfd);
1299
1300   sreloc = NULL;
1301
1302   rel_end = relocs + sec->reloc_count;
1303   for (rel = relocs; rel < rel_end; rel++)
1304     {
1305       unsigned int r_type;
1306       unsigned long r_symndx;
1307       struct elf_link_hash_entry *h;
1308       Elf_Internal_Sym *isym;
1309       const char *name;
1310
1311       r_symndx = ELF32_R_SYM (rel->r_info);
1312       r_type = ELF32_R_TYPE (rel->r_info);
1313
1314       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1315         {
1316           (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1317                                  abfd,
1318                                  r_symndx);
1319           return FALSE;
1320         }
1321
1322       if (r_symndx < symtab_hdr->sh_info)
1323         {
1324           /* A local symbol.  */
1325           isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1326                                         abfd, r_symndx);
1327           if (isym == NULL)
1328             return FALSE;
1329
1330           /* Check relocation against local STT_GNU_IFUNC symbol.  */
1331           if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1332             {
1333               h = elf_i386_get_local_sym_hash (htab, abfd, rel,
1334                                                    TRUE);
1335               if (h == NULL)
1336                 return FALSE;
1337
1338               /* Fake a STT_GNU_IFUNC symbol.  */
1339               h->type = STT_GNU_IFUNC;
1340               h->def_regular = 1;
1341               h->ref_regular = 1;
1342               h->forced_local = 1;
1343               h->root.type = bfd_link_hash_defined;
1344             }
1345           else
1346             h = NULL;
1347         }
1348       else
1349         {
1350           isym = NULL;
1351           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1352           while (h->root.type == bfd_link_hash_indirect
1353                  || h->root.type == bfd_link_hash_warning)
1354             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1355         }
1356
1357       if (h != NULL)
1358         {
1359           /* Create the ifunc sections for static executables.  If we
1360              never see an indirect function symbol nor we are building
1361              a static executable, those sections will be empty and
1362              won't appear in output.  */
1363           switch (r_type)
1364             {
1365             default:
1366               break;
1367
1368             case R_386_32:
1369             case R_386_PC32:
1370             case R_386_PLT32:
1371             case R_386_GOT32:
1372             case R_386_GOTOFF:
1373               if (!_bfd_elf_create_ifunc_sections (abfd, info))
1374                 return FALSE;
1375               break;
1376             }
1377
1378           /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1379              it here if it is defined in a non-shared object.  */
1380           if (h->type == STT_GNU_IFUNC
1381               && h->def_regular)
1382             {
1383               /* It is referenced by a non-shared object. */
1384               h->ref_regular = 1;
1385               h->needs_plt = 1;
1386
1387               /* STT_GNU_IFUNC symbol must go through PLT.  */
1388               h->plt.refcount += 1;
1389
1390               /* STT_GNU_IFUNC needs dynamic sections.  */
1391               if (htab->elf.dynobj == NULL)
1392                 htab->elf.dynobj = abfd;
1393
1394               switch (r_type)
1395                 {
1396                 default:
1397                   if (h->root.root.string)
1398                     name = h->root.root.string;
1399                   else
1400                     name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1401                                              NULL);
1402                   (*_bfd_error_handler)
1403                     (_("%B: relocation %s against STT_GNU_IFUNC "
1404                        "symbol `%s' isn't handled by %s"), abfd,
1405                      elf_howto_table[r_type].name,
1406                      name, __FUNCTION__);
1407                   bfd_set_error (bfd_error_bad_value);
1408                   return FALSE;
1409
1410                 case R_386_32:
1411                   h->non_got_ref = 1;
1412                   h->pointer_equality_needed = 1;
1413                   if (info->shared)
1414                     {
1415                       /* We must copy these reloc types into the
1416                          output file.  Create a reloc section in
1417                          dynobj and make room for this reloc.  */
1418                       sreloc = _bfd_elf_create_ifunc_dyn_reloc
1419                         (abfd, info, sec, sreloc,
1420                          &((struct elf_i386_link_hash_entry *) h)->dyn_relocs);
1421                       if (sreloc == NULL)
1422                         return FALSE;
1423                     }
1424                   break;
1425
1426                 case R_386_PC32:
1427                   h->non_got_ref = 1;
1428                   break;
1429
1430                 case R_386_PLT32:
1431                   break;
1432
1433                 case R_386_GOT32:
1434                 case R_386_GOTOFF:
1435                   h->got.refcount += 1;
1436                   if (htab->elf.sgot == NULL
1437                       && !_bfd_elf_create_got_section (htab->elf.dynobj,
1438                                                        info))
1439                     return FALSE;
1440                   break;
1441                 }
1442
1443               continue;
1444             }
1445         }
1446
1447       if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1448                                      symtab_hdr, sym_hashes,
1449                                      &r_type, GOT_UNKNOWN,
1450                                      rel, rel_end, h, r_symndx))
1451         return FALSE;
1452
1453       switch (r_type)
1454         {
1455         case R_386_TLS_LDM:
1456           htab->tls_ldm_got.refcount += 1;
1457           goto create_got;
1458
1459         case R_386_PLT32:
1460           /* This symbol requires a procedure linkage table entry.  We
1461              actually build the entry in adjust_dynamic_symbol,
1462              because this might be a case of linking PIC code which is
1463              never referenced by a dynamic object, in which case we
1464              don't need to generate a procedure linkage table entry
1465              after all.  */
1466
1467           /* If this is a local symbol, we resolve it directly without
1468              creating a procedure linkage table entry.  */
1469           if (h == NULL)
1470             continue;
1471
1472           h->needs_plt = 1;
1473           h->plt.refcount += 1;
1474           break;
1475
1476         case R_386_TLS_IE_32:
1477         case R_386_TLS_IE:
1478         case R_386_TLS_GOTIE:
1479           if (!info->executable)
1480             info->flags |= DF_STATIC_TLS;
1481           /* Fall through */
1482
1483         case R_386_GOT32:
1484         case R_386_TLS_GD:
1485         case R_386_TLS_GOTDESC:
1486         case R_386_TLS_DESC_CALL:
1487           /* This symbol requires a global offset table entry.  */
1488           {
1489             int tls_type, old_tls_type;
1490
1491             switch (r_type)
1492               {
1493               default:
1494               case R_386_GOT32: tls_type = GOT_NORMAL; break;
1495               case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1496               case R_386_TLS_GOTDESC:
1497               case R_386_TLS_DESC_CALL:
1498                 tls_type = GOT_TLS_GDESC; break;
1499               case R_386_TLS_IE_32:
1500                 if (ELF32_R_TYPE (rel->r_info) == r_type)
1501                   tls_type = GOT_TLS_IE_NEG;
1502                 else
1503                   /* If this is a GD->IE transition, we may use either of
1504                      R_386_TLS_TPOFF and R_386_TLS_TPOFF32.  */
1505                   tls_type = GOT_TLS_IE;
1506                 break;
1507               case R_386_TLS_IE:
1508               case R_386_TLS_GOTIE:
1509                 tls_type = GOT_TLS_IE_POS; break;
1510               }
1511
1512             if (h != NULL)
1513               {
1514                 h->got.refcount += 1;
1515                 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1516               }
1517             else
1518               {
1519                 bfd_signed_vma *local_got_refcounts;
1520
1521                 /* This is a global offset table entry for a local symbol.  */
1522                 local_got_refcounts = elf_local_got_refcounts (abfd);
1523                 if (local_got_refcounts == NULL)
1524                   {
1525                     bfd_size_type size;
1526
1527                     size = symtab_hdr->sh_info;
1528                     size *= (sizeof (bfd_signed_vma)
1529                              + sizeof (bfd_vma) + sizeof(char));
1530                     local_got_refcounts = (bfd_signed_vma *)
1531                         bfd_zalloc (abfd, size);
1532                     if (local_got_refcounts == NULL)
1533                       return FALSE;
1534                     elf_local_got_refcounts (abfd) = local_got_refcounts;
1535                     elf_i386_local_tlsdesc_gotent (abfd)
1536                       = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1537                     elf_i386_local_got_tls_type (abfd)
1538                       = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1539                   }
1540                 local_got_refcounts[r_symndx] += 1;
1541                 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1542               }
1543
1544             if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1545               tls_type |= old_tls_type;
1546             /* If a TLS symbol is accessed using IE at least once,
1547                there is no point to use dynamic model for it.  */
1548             else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1549                      && (! GOT_TLS_GD_ANY_P (old_tls_type)
1550                          || (tls_type & GOT_TLS_IE) == 0))
1551               {
1552                 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1553                   tls_type = old_tls_type;
1554                 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1555                          && GOT_TLS_GD_ANY_P (tls_type))
1556                   tls_type |= old_tls_type;
1557                 else
1558                   {
1559                     if (h)
1560                       name = h->root.root.string;
1561                     else
1562                       name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1563                                              NULL);
1564                     (*_bfd_error_handler)
1565                       (_("%B: `%s' accessed both as normal and "
1566                          "thread local symbol"),
1567                        abfd, name);
1568                     return FALSE;
1569                   }
1570               }
1571
1572             if (old_tls_type != tls_type)
1573               {
1574                 if (h != NULL)
1575                   elf_i386_hash_entry (h)->tls_type = tls_type;
1576                 else
1577                   elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1578               }
1579           }
1580           /* Fall through */
1581
1582         case R_386_GOTOFF:
1583         case R_386_GOTPC:
1584         create_got:
1585           if (htab->elf.sgot == NULL)
1586             {
1587               if (htab->elf.dynobj == NULL)
1588                 htab->elf.dynobj = abfd;
1589               if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1590                 return FALSE;
1591             }
1592           if (r_type != R_386_TLS_IE)
1593             break;
1594           /* Fall through */
1595
1596         case R_386_TLS_LE_32:
1597         case R_386_TLS_LE:
1598           if (info->executable)
1599             break;
1600           info->flags |= DF_STATIC_TLS;
1601           /* Fall through */
1602
1603         case R_386_32:
1604         case R_386_PC32:
1605           if (h != NULL && info->executable)
1606             {
1607               /* If this reloc is in a read-only section, we might
1608                  need a copy reloc.  We can't check reliably at this
1609                  stage whether the section is read-only, as input
1610                  sections have not yet been mapped to output sections.
1611                  Tentatively set the flag for now, and correct in
1612                  adjust_dynamic_symbol.  */
1613               h->non_got_ref = 1;
1614
1615               /* We may need a .plt entry if the function this reloc
1616                  refers to is in a shared lib.  */
1617               h->plt.refcount += 1;
1618               if (r_type != R_386_PC32)
1619                 h->pointer_equality_needed = 1;
1620             }
1621
1622           /* If we are creating a shared library, and this is a reloc
1623              against a global symbol, or a non PC relative reloc
1624              against a local symbol, then we need to copy the reloc
1625              into the shared library.  However, if we are linking with
1626              -Bsymbolic, we do not need to copy a reloc against a
1627              global symbol which is defined in an object we are
1628              including in the link (i.e., DEF_REGULAR is set).  At
1629              this point we have not seen all the input files, so it is
1630              possible that DEF_REGULAR is not set now but will be set
1631              later (it is never cleared).  In case of a weak definition,
1632              DEF_REGULAR may be cleared later by a strong definition in
1633              a shared library.  We account for that possibility below by
1634              storing information in the relocs_copied field of the hash
1635              table entry.  A similar situation occurs when creating
1636              shared libraries and symbol visibility changes render the
1637              symbol local.
1638
1639              If on the other hand, we are creating an executable, we
1640              may need to keep relocations for symbols satisfied by a
1641              dynamic library if we manage to avoid copy relocs for the
1642              symbol.  */
1643           if ((info->shared
1644                && (sec->flags & SEC_ALLOC) != 0
1645                && (r_type != R_386_PC32
1646                    || (h != NULL
1647                        && (! SYMBOLIC_BIND (info, h)
1648                            || h->root.type == bfd_link_hash_defweak
1649                            || !h->def_regular))))
1650               || (ELIMINATE_COPY_RELOCS
1651                   && !info->shared
1652                   && (sec->flags & SEC_ALLOC) != 0
1653                   && h != NULL
1654                   && (h->root.type == bfd_link_hash_defweak
1655                       || !h->def_regular)))
1656             {
1657               struct elf_dyn_relocs *p;
1658               struct elf_dyn_relocs **head;
1659
1660               /* We must copy these reloc types into the output file.
1661                  Create a reloc section in dynobj and make room for
1662                  this reloc.  */
1663               if (sreloc == NULL)
1664                 {
1665                   if (htab->elf.dynobj == NULL)
1666                     htab->elf.dynobj = abfd;
1667
1668                   sreloc = _bfd_elf_make_dynamic_reloc_section
1669                     (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1670
1671                   if (sreloc == NULL)
1672                     return FALSE;
1673                 }
1674
1675               /* If this is a global symbol, we count the number of
1676                  relocations we need for this symbol.  */
1677               if (h != NULL)
1678                 {
1679                   head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1680                 }
1681               else
1682                 {
1683                   /* Track dynamic relocs needed for local syms too.
1684                      We really need local syms available to do this
1685                      easily.  Oh well.  */
1686                   void **vpp;
1687                   asection *s;
1688
1689                   isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1690                                                 abfd, r_symndx);
1691                   if (isym == NULL)
1692                     return FALSE;
1693
1694                   s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1695                   if (s == NULL)
1696                     s = sec;
1697
1698                   vpp = &elf_section_data (s)->local_dynrel;
1699                   head = (struct elf_dyn_relocs **)vpp;
1700                 }
1701
1702               p = *head;
1703               if (p == NULL || p->sec != sec)
1704                 {
1705                   bfd_size_type amt = sizeof *p;
1706                   p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1707                                                            amt);
1708                   if (p == NULL)
1709                     return FALSE;
1710                   p->next = *head;
1711                   *head = p;
1712                   p->sec = sec;
1713                   p->count = 0;
1714                   p->pc_count = 0;
1715                 }
1716
1717               p->count += 1;
1718               if (r_type == R_386_PC32)
1719                 p->pc_count += 1;
1720             }
1721           break;
1722
1723           /* This relocation describes the C++ object vtable hierarchy.
1724              Reconstruct it for later use during GC.  */
1725         case R_386_GNU_VTINHERIT:
1726           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1727             return FALSE;
1728           break;
1729
1730           /* This relocation describes which C++ vtable entries are actually
1731              used.  Record for later use during GC.  */
1732         case R_386_GNU_VTENTRY:
1733           BFD_ASSERT (h != NULL);
1734           if (h != NULL
1735               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1736             return FALSE;
1737           break;
1738
1739         default:
1740           break;
1741         }
1742     }
1743
1744   return TRUE;
1745 }
1746
1747 /* Return the section that should be marked against GC for a given
1748    relocation.  */
1749
1750 static asection *
1751 elf_i386_gc_mark_hook (asection *sec,
1752                        struct bfd_link_info *info,
1753                        Elf_Internal_Rela *rel,
1754                        struct elf_link_hash_entry *h,
1755                        Elf_Internal_Sym *sym)
1756 {
1757   if (h != NULL)
1758     switch (ELF32_R_TYPE (rel->r_info))
1759       {
1760       case R_386_GNU_VTINHERIT:
1761       case R_386_GNU_VTENTRY:
1762         return NULL;
1763       }
1764
1765   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1766 }
1767
1768 /* Update the got entry reference counts for the section being removed.  */
1769
1770 static bfd_boolean
1771 elf_i386_gc_sweep_hook (bfd *abfd,
1772                         struct bfd_link_info *info,
1773                         asection *sec,
1774                         const Elf_Internal_Rela *relocs)
1775 {
1776   struct elf_i386_link_hash_table *htab;
1777   Elf_Internal_Shdr *symtab_hdr;
1778   struct elf_link_hash_entry **sym_hashes;
1779   bfd_signed_vma *local_got_refcounts;
1780   const Elf_Internal_Rela *rel, *relend;
1781
1782   if (info->relocatable)
1783     return TRUE;
1784
1785   htab = elf_i386_hash_table (info);
1786   if (htab == NULL)
1787     return FALSE;
1788
1789   elf_section_data (sec)->local_dynrel = NULL;
1790
1791   symtab_hdr = &elf_symtab_hdr (abfd);
1792   sym_hashes = elf_sym_hashes (abfd);
1793   local_got_refcounts = elf_local_got_refcounts (abfd);
1794
1795   relend = relocs + sec->reloc_count;
1796   for (rel = relocs; rel < relend; rel++)
1797     {
1798       unsigned long r_symndx;
1799       unsigned int r_type;
1800       struct elf_link_hash_entry *h = NULL;
1801
1802       r_symndx = ELF32_R_SYM (rel->r_info);
1803       if (r_symndx >= symtab_hdr->sh_info)
1804         {
1805           struct elf_i386_link_hash_entry *eh;
1806           struct elf_dyn_relocs **pp;
1807           struct elf_dyn_relocs *p;
1808
1809           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1810           while (h->root.type == bfd_link_hash_indirect
1811                  || h->root.type == bfd_link_hash_warning)
1812             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1813           eh = (struct elf_i386_link_hash_entry *) h;
1814
1815           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1816             if (p->sec == sec)
1817               {
1818                 /* Everything must go for SEC.  */
1819                 *pp = p->next;
1820                 break;
1821               }
1822         }
1823
1824       r_type = ELF32_R_TYPE (rel->r_info);
1825       if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1826                                      symtab_hdr, sym_hashes,
1827                                      &r_type, GOT_UNKNOWN,
1828                                      rel, relend, h, r_symndx))
1829         return FALSE;
1830
1831       switch (r_type)
1832         {
1833         case R_386_TLS_LDM:
1834           if (htab->tls_ldm_got.refcount > 0)
1835             htab->tls_ldm_got.refcount -= 1;
1836           break;
1837
1838         case R_386_TLS_GD:
1839         case R_386_TLS_GOTDESC:
1840         case R_386_TLS_DESC_CALL:
1841         case R_386_TLS_IE_32:
1842         case R_386_TLS_IE:
1843         case R_386_TLS_GOTIE:
1844         case R_386_GOT32:
1845           if (h != NULL)
1846             {
1847               if (h->got.refcount > 0)
1848                 h->got.refcount -= 1;
1849             }
1850           else if (local_got_refcounts != NULL)
1851             {
1852               if (local_got_refcounts[r_symndx] > 0)
1853                 local_got_refcounts[r_symndx] -= 1;
1854             }
1855           break;
1856
1857         case R_386_32:
1858         case R_386_PC32:
1859           if (info->shared)
1860             break;
1861           /* Fall through */
1862
1863         case R_386_PLT32:
1864           if (h != NULL)
1865             {
1866               if (h->plt.refcount > 0)
1867                 h->plt.refcount -= 1;
1868             }
1869           break;
1870
1871         default:
1872           break;
1873         }
1874     }
1875
1876   return TRUE;
1877 }
1878
1879 /* Adjust a symbol defined by a dynamic object and referenced by a
1880    regular object.  The current definition is in some section of the
1881    dynamic object, but we're not including those sections.  We have to
1882    change the definition to something the rest of the link can
1883    understand.  */
1884
1885 static bfd_boolean
1886 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1887                                 struct elf_link_hash_entry *h)
1888 {
1889   struct elf_i386_link_hash_table *htab;
1890   asection *s;
1891
1892   /* STT_GNU_IFUNC symbol must go through PLT. */
1893   if (h->type == STT_GNU_IFUNC)
1894     {
1895       if (h->plt.refcount <= 0)
1896         {
1897           h->plt.offset = (bfd_vma) -1;
1898           h->needs_plt = 0;
1899         }
1900       return TRUE;
1901     }
1902
1903   /* If this is a function, put it in the procedure linkage table.  We
1904      will fill in the contents of the procedure linkage table later,
1905      when we know the address of the .got section.  */
1906   if (h->type == STT_FUNC
1907       || h->needs_plt)
1908     {
1909       if (h->plt.refcount <= 0
1910           || SYMBOL_CALLS_LOCAL (info, h)
1911           || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1912               && h->root.type == bfd_link_hash_undefweak))
1913         {
1914           /* This case can occur if we saw a PLT32 reloc in an input
1915              file, but the symbol was never referred to by a dynamic
1916              object, or if all references were garbage collected.  In
1917              such a case, we don't actually need to build a procedure
1918              linkage table, and we can just do a PC32 reloc instead.  */
1919           h->plt.offset = (bfd_vma) -1;
1920           h->needs_plt = 0;
1921         }
1922
1923       return TRUE;
1924     }
1925   else
1926     /* It's possible that we incorrectly decided a .plt reloc was
1927        needed for an R_386_PC32 reloc to a non-function sym in
1928        check_relocs.  We can't decide accurately between function and
1929        non-function syms in check-relocs;  Objects loaded later in
1930        the link may change h->type.  So fix it now.  */
1931     h->plt.offset = (bfd_vma) -1;
1932
1933   /* If this is a weak symbol, and there is a real definition, the
1934      processor independent code will have arranged for us to see the
1935      real definition first, and we can just use the same value.  */
1936   if (h->u.weakdef != NULL)
1937     {
1938       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1939                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
1940       h->root.u.def.section = h->u.weakdef->root.u.def.section;
1941       h->root.u.def.value = h->u.weakdef->root.u.def.value;
1942       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1943         h->non_got_ref = h->u.weakdef->non_got_ref;
1944       return TRUE;
1945     }
1946
1947   /* This is a reference to a symbol defined by a dynamic object which
1948      is not a function.  */
1949
1950   /* If we are creating a shared library, we must presume that the
1951      only references to the symbol are via the global offset table.
1952      For such cases we need not do anything here; the relocations will
1953      be handled correctly by relocate_section.  */
1954   if (info->shared)
1955     return TRUE;
1956
1957   /* If there are no references to this symbol that do not use the
1958      GOT, we don't need to generate a copy reloc.  */
1959   if (!h->non_got_ref)
1960     return TRUE;
1961
1962   /* If -z nocopyreloc was given, we won't generate them either.  */
1963   if (info->nocopyreloc)
1964     {
1965       h->non_got_ref = 0;
1966       return TRUE;
1967     }
1968
1969   htab = elf_i386_hash_table (info);
1970   if (htab == NULL)
1971     return FALSE;
1972
1973   /* If there aren't any dynamic relocs in read-only sections, then
1974      we can keep the dynamic relocs and avoid the copy reloc.  This
1975      doesn't work on VxWorks, where we can not have dynamic relocations
1976      (other than copy and jump slot relocations) in an executable.  */
1977   if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
1978     {
1979       struct elf_i386_link_hash_entry * eh;
1980       struct elf_dyn_relocs *p;
1981
1982       eh = (struct elf_i386_link_hash_entry *) h;
1983       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1984         {
1985           s = p->sec->output_section;
1986           if (s != NULL && (s->flags & SEC_READONLY) != 0)
1987             break;
1988         }
1989
1990       if (p == NULL)
1991         {
1992           h->non_got_ref = 0;
1993           return TRUE;
1994         }
1995     }
1996
1997   if (h->size == 0)
1998     {
1999       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2000                              h->root.root.string);
2001       return TRUE;
2002     }
2003
2004   /* We must allocate the symbol in our .dynbss section, which will
2005      become part of the .bss section of the executable.  There will be
2006      an entry for this symbol in the .dynsym section.  The dynamic
2007      object will contain position independent code, so all references
2008      from the dynamic object to this symbol will go through the global
2009      offset table.  The dynamic linker will use the .dynsym entry to
2010      determine the address it must put in the global offset table, so
2011      both the dynamic object and the regular object will refer to the
2012      same memory location for the variable.  */
2013
2014   /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2015      copy the initial value out of the dynamic object and into the
2016      runtime process image.  */
2017   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2018     {
2019       htab->srelbss->size += sizeof (Elf32_External_Rel);
2020       h->needs_copy = 1;
2021     }
2022
2023   s = htab->sdynbss;
2024
2025   return _bfd_elf_adjust_dynamic_copy (h, s);
2026 }
2027
2028 /* Allocate space in .plt, .got and associated reloc sections for
2029    dynamic relocs.  */
2030
2031 static bfd_boolean
2032 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2033 {
2034   struct bfd_link_info *info;
2035   struct elf_i386_link_hash_table *htab;
2036   struct elf_i386_link_hash_entry *eh;
2037   struct elf_dyn_relocs *p;
2038
2039   if (h->root.type == bfd_link_hash_indirect)
2040     return TRUE;
2041
2042   if (h->root.type == bfd_link_hash_warning)
2043     /* When warning symbols are created, they **replace** the "real"
2044        entry in the hash table, thus we never get to see the real
2045        symbol in a hash traversal.  So look at it now.  */
2046     h = (struct elf_link_hash_entry *) h->root.u.i.link;
2047   eh = (struct elf_i386_link_hash_entry *) h;
2048
2049   info = (struct bfd_link_info *) inf;
2050   htab = elf_i386_hash_table (info);
2051   if (htab == NULL)
2052     return FALSE;
2053
2054   /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2055      here if it is defined and referenced in a non-shared object.  */
2056   if (h->type == STT_GNU_IFUNC
2057       && h->def_regular)
2058     return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2059                                                &eh->dyn_relocs,
2060                                                PLT_ENTRY_SIZE, 4);
2061   else if (htab->elf.dynamic_sections_created
2062            && h->plt.refcount > 0)
2063     {
2064       /* Make sure this symbol is output as a dynamic symbol.
2065          Undefined weak syms won't yet be marked as dynamic.  */
2066       if (h->dynindx == -1
2067           && !h->forced_local)
2068         {
2069           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2070             return FALSE;
2071         }
2072
2073       if (info->shared
2074           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2075         {
2076           asection *s = htab->elf.splt;
2077
2078           /* If this is the first .plt entry, make room for the special
2079              first entry.  */
2080           if (s->size == 0)
2081             s->size += PLT_ENTRY_SIZE;
2082
2083           h->plt.offset = s->size;
2084
2085           /* If this symbol is not defined in a regular file, and we are
2086              not generating a shared library, then set the symbol to this
2087              location in the .plt.  This is required to make function
2088              pointers compare as equal between the normal executable and
2089              the shared library.  */
2090           if (! info->shared
2091               && !h->def_regular)
2092             {
2093               h->root.u.def.section = s;
2094               h->root.u.def.value = h->plt.offset;
2095             }
2096
2097           /* Make room for this entry.  */
2098           s->size += PLT_ENTRY_SIZE;
2099
2100           /* We also need to make an entry in the .got.plt section, which
2101              will be placed in the .got section by the linker script.  */
2102           htab->elf.sgotplt->size += 4;
2103
2104           /* We also need to make an entry in the .rel.plt section.  */
2105           htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2106           htab->next_tls_desc_index++;
2107
2108           if (htab->is_vxworks && !info->shared)
2109             {
2110               /* VxWorks has a second set of relocations for each PLT entry
2111                  in executables.  They go in a separate relocation section,
2112                  which is processed by the kernel loader.  */
2113
2114               /* There are two relocations for the initial PLT entry: an
2115                  R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2116                  R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8.  */
2117
2118               if (h->plt.offset == PLT_ENTRY_SIZE)
2119                 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2120
2121               /* There are two extra relocations for each subsequent PLT entry:
2122                  an R_386_32 relocation for the GOT entry, and an R_386_32
2123                  relocation for the PLT entry.  */
2124
2125               htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2126             }
2127         }
2128       else
2129         {
2130           h->plt.offset = (bfd_vma) -1;
2131           h->needs_plt = 0;
2132         }
2133     }
2134   else
2135     {
2136       h->plt.offset = (bfd_vma) -1;
2137       h->needs_plt = 0;
2138     }
2139
2140   eh->tlsdesc_got = (bfd_vma) -1;
2141
2142   /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2143      make it a R_386_TLS_LE_32 requiring no TLS entry.  */
2144   if (h->got.refcount > 0
2145       && info->executable
2146       && h->dynindx == -1
2147       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2148     h->got.offset = (bfd_vma) -1;
2149   else if (h->got.refcount > 0)
2150     {
2151       asection *s;
2152       bfd_boolean dyn;
2153       int tls_type = elf_i386_hash_entry(h)->tls_type;
2154
2155       /* Make sure this symbol is output as a dynamic symbol.
2156          Undefined weak syms won't yet be marked as dynamic.  */
2157       if (h->dynindx == -1
2158           && !h->forced_local)
2159         {
2160           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2161             return FALSE;
2162         }
2163
2164       s = htab->elf.sgot;
2165       if (GOT_TLS_GDESC_P (tls_type))
2166         {
2167           eh->tlsdesc_got = htab->elf.sgotplt->size
2168             - elf_i386_compute_jump_table_size (htab);
2169           htab->elf.sgotplt->size += 8;
2170           h->got.offset = (bfd_vma) -2;
2171         }
2172       if (! GOT_TLS_GDESC_P (tls_type)
2173           || GOT_TLS_GD_P (tls_type))
2174         {
2175           h->got.offset = s->size;
2176           s->size += 4;
2177           /* R_386_TLS_GD needs 2 consecutive GOT slots.  */
2178           if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2179             s->size += 4;
2180         }
2181       dyn = htab->elf.dynamic_sections_created;
2182       /* R_386_TLS_IE_32 needs one dynamic relocation,
2183          R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2184          (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2185          need two), R_386_TLS_GD needs one if local symbol and two if
2186          global.  */
2187       if (tls_type == GOT_TLS_IE_BOTH)
2188         htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2189       else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2190                || (tls_type & GOT_TLS_IE))
2191         htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2192       else if (GOT_TLS_GD_P (tls_type))
2193         htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2194       else if (! GOT_TLS_GDESC_P (tls_type)
2195                && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2196                    || h->root.type != bfd_link_hash_undefweak)
2197                && (info->shared
2198                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2199         htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2200       if (GOT_TLS_GDESC_P (tls_type))
2201         htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2202     }
2203   else
2204     h->got.offset = (bfd_vma) -1;
2205
2206   if (eh->dyn_relocs == NULL)
2207     return TRUE;
2208
2209   /* In the shared -Bsymbolic case, discard space allocated for
2210      dynamic pc-relative relocs against symbols which turn out to be
2211      defined in regular objects.  For the normal shared case, discard
2212      space for pc-relative relocs that have become local due to symbol
2213      visibility changes.  */
2214
2215   if (info->shared)
2216     {
2217       /* The only reloc that uses pc_count is R_386_PC32, which will
2218          appear on a call or on something like ".long foo - .".  We
2219          want calls to protected symbols to resolve directly to the
2220          function rather than going via the plt.  If people want
2221          function pointer comparisons to work as expected then they
2222          should avoid writing assembly like ".long foo - .".  */
2223       if (SYMBOL_CALLS_LOCAL (info, h))
2224         {
2225           struct elf_dyn_relocs **pp;
2226
2227           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2228             {
2229               p->count -= p->pc_count;
2230               p->pc_count = 0;
2231               if (p->count == 0)
2232                 *pp = p->next;
2233               else
2234                 pp = &p->next;
2235             }
2236         }
2237
2238       if (htab->is_vxworks)
2239         {
2240           struct elf_dyn_relocs **pp;
2241           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2242             {
2243               if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2244                 *pp = p->next;
2245               else
2246                 pp = &p->next;
2247             }
2248         }
2249
2250       /* Also discard relocs on undefined weak syms with non-default
2251          visibility.  */
2252       if (eh->dyn_relocs != NULL
2253           && h->root.type == bfd_link_hash_undefweak)
2254         {
2255           if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2256             eh->dyn_relocs = NULL;
2257
2258           /* Make sure undefined weak symbols are output as a dynamic
2259              symbol in PIEs.  */
2260           else if (h->dynindx == -1
2261                    && !h->forced_local)
2262             {
2263               if (! bfd_elf_link_record_dynamic_symbol (info, h))
2264                 return FALSE;
2265             }
2266         }
2267     }
2268   else if (ELIMINATE_COPY_RELOCS)
2269     {
2270       /* For the non-shared case, discard space for relocs against
2271          symbols which turn out to need copy relocs or are not
2272          dynamic.  */
2273
2274       if (!h->non_got_ref
2275           && ((h->def_dynamic
2276                && !h->def_regular)
2277               || (htab->elf.dynamic_sections_created
2278                   && (h->root.type == bfd_link_hash_undefweak
2279                       || h->root.type == bfd_link_hash_undefined))))
2280         {
2281           /* Make sure this symbol is output as a dynamic symbol.
2282              Undefined weak syms won't yet be marked as dynamic.  */
2283           if (h->dynindx == -1
2284               && !h->forced_local)
2285             {
2286               if (! bfd_elf_link_record_dynamic_symbol (info, h))
2287                 return FALSE;
2288             }
2289
2290           /* If that succeeded, we know we'll be keeping all the
2291              relocs.  */
2292           if (h->dynindx != -1)
2293             goto keep;
2294         }
2295
2296       eh->dyn_relocs = NULL;
2297
2298     keep: ;
2299     }
2300
2301   /* Finally, allocate space.  */
2302   for (p = eh->dyn_relocs; p != NULL; p = p->next)
2303     {
2304       asection *sreloc;
2305
2306       sreloc = elf_section_data (p->sec)->sreloc;
2307
2308       BFD_ASSERT (sreloc != NULL);
2309       sreloc->size += p->count * sizeof (Elf32_External_Rel);
2310     }
2311
2312   return TRUE;
2313 }
2314
2315 /* Allocate space in .plt, .got and associated reloc sections for
2316    local dynamic relocs.  */
2317
2318 static bfd_boolean
2319 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2320 {
2321   struct elf_link_hash_entry *h
2322     = (struct elf_link_hash_entry *) *slot;
2323
2324   if (h->type != STT_GNU_IFUNC
2325       || !h->def_regular
2326       || !h->ref_regular
2327       || !h->forced_local
2328       || h->root.type != bfd_link_hash_defined)
2329     abort ();
2330
2331   return elf_i386_allocate_dynrelocs (h, inf);
2332 }
2333
2334 /* Find any dynamic relocs that apply to read-only sections.  */
2335
2336 static bfd_boolean
2337 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2338 {
2339   struct elf_i386_link_hash_entry *eh;
2340   struct elf_dyn_relocs *p;
2341
2342   if (h->root.type == bfd_link_hash_warning)
2343     h = (struct elf_link_hash_entry *) h->root.u.i.link;
2344
2345   eh = (struct elf_i386_link_hash_entry *) h;
2346   for (p = eh->dyn_relocs; p != NULL; p = p->next)
2347     {
2348       asection *s = p->sec->output_section;
2349
2350       if (s != NULL && (s->flags & SEC_READONLY) != 0)
2351         {
2352           struct bfd_link_info *info = (struct bfd_link_info *) inf;
2353
2354           info->flags |= DF_TEXTREL;
2355
2356           /* Not an error, just cut short the traversal.  */
2357           return FALSE;
2358         }
2359     }
2360   return TRUE;
2361 }
2362
2363 /* Set the sizes of the dynamic sections.  */
2364
2365 static bfd_boolean
2366 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2367                                 struct bfd_link_info *info)
2368 {
2369   struct elf_i386_link_hash_table *htab;
2370   bfd *dynobj;
2371   asection *s;
2372   bfd_boolean relocs;
2373   bfd *ibfd;
2374
2375   htab = elf_i386_hash_table (info);
2376   if (htab == NULL)
2377     return FALSE;
2378   dynobj = htab->elf.dynobj;
2379   if (dynobj == NULL)
2380     abort ();
2381
2382   if (htab->elf.dynamic_sections_created)
2383     {
2384       /* Set the contents of the .interp section to the interpreter.  */
2385       if (info->executable)
2386         {
2387           s = bfd_get_section_by_name (dynobj, ".interp");
2388           if (s == NULL)
2389             abort ();
2390           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2391           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2392         }
2393     }
2394
2395   /* Set up .got offsets for local syms, and space for local dynamic
2396      relocs.  */
2397   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2398     {
2399       bfd_signed_vma *local_got;
2400       bfd_signed_vma *end_local_got;
2401       char *local_tls_type;
2402       bfd_vma *local_tlsdesc_gotent;
2403       bfd_size_type locsymcount;
2404       Elf_Internal_Shdr *symtab_hdr;
2405       asection *srel;
2406
2407       if (! is_i386_elf (ibfd))
2408         continue;
2409
2410       for (s = ibfd->sections; s != NULL; s = s->next)
2411         {
2412           struct elf_dyn_relocs *p;
2413
2414           for (p = ((struct elf_dyn_relocs *)
2415                      elf_section_data (s)->local_dynrel);
2416                p != NULL;
2417                p = p->next)
2418             {
2419               if (!bfd_is_abs_section (p->sec)
2420                   && bfd_is_abs_section (p->sec->output_section))
2421                 {
2422                   /* Input section has been discarded, either because
2423                      it is a copy of a linkonce section or due to
2424                      linker script /DISCARD/, so we'll be discarding
2425                      the relocs too.  */
2426                 }
2427               else if (htab->is_vxworks
2428                        && strcmp (p->sec->output_section->name,
2429                                   ".tls_vars") == 0)
2430                 {
2431                   /* Relocations in vxworks .tls_vars sections are
2432                      handled specially by the loader.  */
2433                 }
2434               else if (p->count != 0)
2435                 {
2436                   srel = elf_section_data (p->sec)->sreloc;
2437                   srel->size += p->count * sizeof (Elf32_External_Rel);
2438                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2439                     info->flags |= DF_TEXTREL;
2440                 }
2441             }
2442         }
2443
2444       local_got = elf_local_got_refcounts (ibfd);
2445       if (!local_got)
2446         continue;
2447
2448       symtab_hdr = &elf_symtab_hdr (ibfd);
2449       locsymcount = symtab_hdr->sh_info;
2450       end_local_got = local_got + locsymcount;
2451       local_tls_type = elf_i386_local_got_tls_type (ibfd);
2452       local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2453       s = htab->elf.sgot;
2454       srel = htab->elf.srelgot;
2455       for (; local_got < end_local_got;
2456            ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2457         {
2458           *local_tlsdesc_gotent = (bfd_vma) -1;
2459           if (*local_got > 0)
2460             {
2461               if (GOT_TLS_GDESC_P (*local_tls_type))
2462                 {
2463                   *local_tlsdesc_gotent = htab->elf.sgotplt->size
2464                     - elf_i386_compute_jump_table_size (htab);
2465                   htab->elf.sgotplt->size += 8;
2466                   *local_got = (bfd_vma) -2;
2467                 }
2468               if (! GOT_TLS_GDESC_P (*local_tls_type)
2469                   || GOT_TLS_GD_P (*local_tls_type))
2470                 {
2471                   *local_got = s->size;
2472                   s->size += 4;
2473                   if (GOT_TLS_GD_P (*local_tls_type)
2474                       || *local_tls_type == GOT_TLS_IE_BOTH)
2475                     s->size += 4;
2476                 }
2477               if (info->shared
2478                   || GOT_TLS_GD_ANY_P (*local_tls_type)
2479                   || (*local_tls_type & GOT_TLS_IE))
2480                 {
2481                   if (*local_tls_type == GOT_TLS_IE_BOTH)
2482                     srel->size += 2 * sizeof (Elf32_External_Rel);
2483                   else if (GOT_TLS_GD_P (*local_tls_type)
2484                            || ! GOT_TLS_GDESC_P (*local_tls_type))
2485                     srel->size += sizeof (Elf32_External_Rel);
2486                   if (GOT_TLS_GDESC_P (*local_tls_type))
2487                     htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2488                 }
2489             }
2490           else
2491             *local_got = (bfd_vma) -1;
2492         }
2493     }
2494
2495   if (htab->tls_ldm_got.refcount > 0)
2496     {
2497       /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2498          relocs.  */
2499       htab->tls_ldm_got.offset = htab->elf.sgot->size;
2500       htab->elf.sgot->size += 8;
2501       htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2502     }
2503   else
2504     htab->tls_ldm_got.offset = -1;
2505
2506   /* Allocate global sym .plt and .got entries, and space for global
2507      sym dynamic relocs.  */
2508   elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2509
2510   /* Allocate .plt and .got entries, and space for local symbols.  */
2511   htab_traverse (htab->loc_hash_table,
2512                  elf_i386_allocate_local_dynrelocs,
2513                  info);
2514
2515   /* For every jump slot reserved in the sgotplt, reloc_count is
2516      incremented.  However, when we reserve space for TLS descriptors,
2517      it's not incremented, so in order to compute the space reserved
2518      for them, it suffices to multiply the reloc count by the jump
2519      slot size.  */
2520   if (htab->elf.srelplt)
2521     htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2522
2523   /* We now have determined the sizes of the various dynamic sections.
2524      Allocate memory for them.  */
2525   relocs = FALSE;
2526   for (s = dynobj->sections; s != NULL; s = s->next)
2527     {
2528       bfd_boolean strip_section = TRUE;
2529
2530       if ((s->flags & SEC_LINKER_CREATED) == 0)
2531         continue;
2532
2533       if (s == htab->elf.splt
2534           || s == htab->elf.sgot
2535           || s == htab->elf.sgotplt
2536           || s == htab->elf.iplt
2537           || s == htab->elf.igotplt
2538           || s == htab->sdynbss)
2539         {
2540           /* Strip this section if we don't need it; see the
2541              comment below.  */
2542           /* We'd like to strip these sections if they aren't needed, but if
2543              we've exported dynamic symbols from them we must leave them.
2544              It's too late to tell BFD to get rid of the symbols.  */
2545
2546           if (htab->elf.hplt != NULL)
2547             strip_section = FALSE;
2548         }
2549       else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2550         {
2551           if (s->size != 0
2552               && s != htab->elf.srelplt
2553               && s != htab->srelplt2)
2554             relocs = TRUE;
2555
2556           /* We use the reloc_count field as a counter if we need
2557              to copy relocs into the output file.  */
2558           s->reloc_count = 0;
2559         }
2560       else
2561         {
2562           /* It's not one of our sections, so don't allocate space.  */
2563           continue;
2564         }
2565
2566       if (s->size == 0)
2567         {
2568           /* If we don't need this section, strip it from the
2569              output file.  This is mostly to handle .rel.bss and
2570              .rel.plt.  We must create both sections in
2571              create_dynamic_sections, because they must be created
2572              before the linker maps input sections to output
2573              sections.  The linker does that before
2574              adjust_dynamic_symbol is called, and it is that
2575              function which decides whether anything needs to go
2576              into these sections.  */
2577           if (strip_section)
2578             s->flags |= SEC_EXCLUDE;
2579           continue;
2580         }
2581
2582       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2583         continue;
2584
2585       /* Allocate memory for the section contents.  We use bfd_zalloc
2586          here in case unused entries are not reclaimed before the
2587          section's contents are written out.  This should not happen,
2588          but this way if it does, we get a R_386_NONE reloc instead
2589          of garbage.  */
2590       s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2591       if (s->contents == NULL)
2592         return FALSE;
2593     }
2594
2595   if (htab->elf.dynamic_sections_created)
2596     {
2597       /* Add some entries to the .dynamic section.  We fill in the
2598          values later, in elf_i386_finish_dynamic_sections, but we
2599          must add the entries now so that we get the correct size for
2600          the .dynamic section.  The DT_DEBUG entry is filled in by the
2601          dynamic linker and used by the debugger.  */
2602 #define add_dynamic_entry(TAG, VAL) \
2603   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2604
2605       if (info->executable)
2606         {
2607           if (!add_dynamic_entry (DT_DEBUG, 0))
2608             return FALSE;
2609         }
2610
2611       if (htab->elf.splt->size != 0)
2612         {
2613           if (!add_dynamic_entry (DT_PLTGOT, 0)
2614               || !add_dynamic_entry (DT_PLTRELSZ, 0)
2615               || !add_dynamic_entry (DT_PLTREL, DT_REL)
2616               || !add_dynamic_entry (DT_JMPREL, 0))
2617             return FALSE;
2618         }
2619
2620       if (relocs)
2621         {
2622           if (!add_dynamic_entry (DT_REL, 0)
2623               || !add_dynamic_entry (DT_RELSZ, 0)
2624               || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2625             return FALSE;
2626
2627           /* If any dynamic relocs apply to a read-only section,
2628              then we need a DT_TEXTREL entry.  */
2629           if ((info->flags & DF_TEXTREL) == 0)
2630             elf_link_hash_traverse (&htab->elf,
2631                                     elf_i386_readonly_dynrelocs, info);
2632
2633           if ((info->flags & DF_TEXTREL) != 0)
2634             {
2635               if (!add_dynamic_entry (DT_TEXTREL, 0))
2636                 return FALSE;
2637             }
2638         }
2639       if (htab->is_vxworks
2640           && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2641         return FALSE;
2642     }
2643 #undef add_dynamic_entry
2644
2645   return TRUE;
2646 }
2647
2648 static bfd_boolean
2649 elf_i386_always_size_sections (bfd *output_bfd,
2650                                struct bfd_link_info *info)
2651 {
2652   asection *tls_sec = elf_hash_table (info)->tls_sec;
2653
2654   if (tls_sec)
2655     {
2656       struct elf_link_hash_entry *tlsbase;
2657
2658       tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2659                                       "_TLS_MODULE_BASE_",
2660                                       FALSE, FALSE, FALSE);
2661
2662       if (tlsbase && tlsbase->type == STT_TLS)
2663         {
2664           struct elf_i386_link_hash_table *htab;
2665           struct bfd_link_hash_entry *bh = NULL;
2666           const struct elf_backend_data *bed
2667             = get_elf_backend_data (output_bfd);
2668
2669           htab = elf_i386_hash_table (info);
2670           if (htab == NULL)
2671             return FALSE;
2672
2673           if (!(_bfd_generic_link_add_one_symbol
2674                 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2675                  tls_sec, 0, NULL, FALSE,
2676                  bed->collect, &bh)))
2677             return FALSE;
2678
2679           htab->tls_module_base = bh;
2680
2681           tlsbase = (struct elf_link_hash_entry *)bh;
2682           tlsbase->def_regular = 1;
2683           tlsbase->other = STV_HIDDEN;
2684           (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2685         }
2686     }
2687
2688   return TRUE;
2689 }
2690
2691 /* Set the correct type for an x86 ELF section.  We do this by the
2692    section name, which is a hack, but ought to work.  */
2693
2694 static bfd_boolean
2695 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2696                         Elf_Internal_Shdr *hdr,
2697                         asection *sec)
2698 {
2699   const char *name;
2700
2701   name = bfd_get_section_name (abfd, sec);
2702
2703   /* This is an ugly, but unfortunately necessary hack that is
2704      needed when producing EFI binaries on x86. It tells
2705      elf.c:elf_fake_sections() not to consider ".reloc" as a section
2706      containing ELF relocation info.  We need this hack in order to
2707      be able to generate ELF binaries that can be translated into
2708      EFI applications (which are essentially COFF objects).  Those
2709      files contain a COFF ".reloc" section inside an ELFNN object,
2710      which would normally cause BFD to segfault because it would
2711      attempt to interpret this section as containing relocation
2712      entries for section "oc".  With this hack enabled, ".reloc"
2713      will be treated as a normal data section, which will avoid the
2714      segfault.  However, you won't be able to create an ELFNN binary
2715      with a section named "oc" that needs relocations, but that's
2716      the kind of ugly side-effects you get when detecting section
2717      types based on their names...  In practice, this limitation is
2718      unlikely to bite.  */
2719   if (strcmp (name, ".reloc") == 0)
2720     hdr->sh_type = SHT_PROGBITS;
2721
2722   return TRUE;
2723 }
2724
2725 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2726    executables.  Rather than setting it to the beginning of the TLS
2727    section, we have to set it to the end.    This function may be called
2728    multiple times, it is idempotent.  */
2729
2730 static void
2731 elf_i386_set_tls_module_base (struct bfd_link_info *info)
2732 {
2733   struct elf_i386_link_hash_table *htab;
2734   struct bfd_link_hash_entry *base;
2735
2736   if (!info->executable)
2737     return;
2738
2739   htab = elf_i386_hash_table (info);
2740   if (htab == NULL)
2741     return;
2742
2743   base = htab->tls_module_base;
2744   if (base == NULL)
2745     return;
2746
2747   base->u.def.value = htab->elf.tls_size;
2748 }
2749
2750 /* Return the base VMA address which should be subtracted from real addresses
2751    when resolving @dtpoff relocation.
2752    This is PT_TLS segment p_vaddr.  */
2753
2754 static bfd_vma
2755 elf_i386_dtpoff_base (struct bfd_link_info *info)
2756 {
2757   /* If tls_sec is NULL, we should have signalled an error already.  */
2758   if (elf_hash_table (info)->tls_sec == NULL)
2759     return 0;
2760   return elf_hash_table (info)->tls_sec->vma;
2761 }
2762
2763 /* Return the relocation value for @tpoff relocation
2764    if STT_TLS virtual address is ADDRESS.  */
2765
2766 static bfd_vma
2767 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2768 {
2769   struct elf_link_hash_table *htab = elf_hash_table (info);
2770
2771   /* If tls_sec is NULL, we should have signalled an error already.  */
2772   if (htab->tls_sec == NULL)
2773     return 0;
2774   return htab->tls_size + htab->tls_sec->vma - address;
2775 }
2776
2777 /* Relocate an i386 ELF section.  */
2778
2779 static bfd_boolean
2780 elf_i386_relocate_section (bfd *output_bfd,
2781                            struct bfd_link_info *info,
2782                            bfd *input_bfd,
2783                            asection *input_section,
2784                            bfd_byte *contents,
2785                            Elf_Internal_Rela *relocs,
2786                            Elf_Internal_Sym *local_syms,
2787                            asection **local_sections)
2788 {
2789   struct elf_i386_link_hash_table *htab;
2790   Elf_Internal_Shdr *symtab_hdr;
2791   struct elf_link_hash_entry **sym_hashes;
2792   bfd_vma *local_got_offsets;
2793   bfd_vma *local_tlsdesc_gotents;
2794   Elf_Internal_Rela *rel;
2795   Elf_Internal_Rela *relend;
2796   bfd_boolean is_vxworks_tls;
2797
2798   BFD_ASSERT (is_i386_elf (input_bfd));
2799
2800   htab = elf_i386_hash_table (info);
2801   if (htab == NULL)
2802     return FALSE;
2803   symtab_hdr = &elf_symtab_hdr (input_bfd);
2804   sym_hashes = elf_sym_hashes (input_bfd);
2805   local_got_offsets = elf_local_got_offsets (input_bfd);
2806   local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2807   /* We have to handle relocations in vxworks .tls_vars sections
2808      specially, because the dynamic loader is 'weird'.  */
2809   is_vxworks_tls = (htab->is_vxworks && info->shared
2810                     && !strcmp (input_section->output_section->name,
2811                                 ".tls_vars"));
2812
2813   elf_i386_set_tls_module_base (info);
2814
2815   rel = relocs;
2816   relend = relocs + input_section->reloc_count;
2817   for (; rel < relend; rel++)
2818     {
2819       unsigned int r_type;
2820       reloc_howto_type *howto;
2821       unsigned long r_symndx;
2822       struct elf_link_hash_entry *h;
2823       Elf_Internal_Sym *sym;
2824       asection *sec;
2825       bfd_vma off, offplt;
2826       bfd_vma relocation;
2827       bfd_boolean unresolved_reloc;
2828       bfd_reloc_status_type r;
2829       unsigned int indx;
2830       int tls_type;
2831
2832       r_type = ELF32_R_TYPE (rel->r_info);
2833       if (r_type == R_386_GNU_VTINHERIT
2834           || r_type == R_386_GNU_VTENTRY)
2835         continue;
2836
2837       if ((indx = r_type) >= R_386_standard
2838           && ((indx = r_type - R_386_ext_offset) - R_386_standard
2839               >= R_386_ext - R_386_standard)
2840           && ((indx = r_type - R_386_tls_offset) - R_386_ext
2841               >= R_386_irelative - R_386_ext))
2842         {
2843           (*_bfd_error_handler)
2844             (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2845              input_bfd, input_section, r_type);
2846           bfd_set_error (bfd_error_bad_value);
2847           return FALSE;
2848         }
2849       howto = elf_howto_table + indx;
2850
2851       r_symndx = ELF32_R_SYM (rel->r_info);
2852       h = NULL;
2853       sym = NULL;
2854       sec = NULL;
2855       unresolved_reloc = FALSE;
2856       if (r_symndx < symtab_hdr->sh_info)
2857         {
2858           sym = local_syms + r_symndx;
2859           sec = local_sections[r_symndx];
2860           relocation = (sec->output_section->vma
2861                         + sec->output_offset
2862                         + sym->st_value);
2863
2864           if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2865               && ((sec->flags & SEC_MERGE) != 0
2866                   || (info->relocatable
2867                       && sec->output_offset != 0)))
2868             {
2869               bfd_vma addend;
2870               bfd_byte *where = contents + rel->r_offset;
2871
2872               switch (howto->size)
2873                 {
2874                 case 0:
2875                   addend = bfd_get_8 (input_bfd, where);
2876                   if (howto->pc_relative)
2877                     {
2878                       addend = (addend ^ 0x80) - 0x80;
2879                       addend += 1;
2880                     }
2881                   break;
2882                 case 1:
2883                   addend = bfd_get_16 (input_bfd, where);
2884                   if (howto->pc_relative)
2885                     {
2886                       addend = (addend ^ 0x8000) - 0x8000;
2887                       addend += 2;
2888                     }
2889                   break;
2890                 case 2:
2891                   addend = bfd_get_32 (input_bfd, where);
2892                   if (howto->pc_relative)
2893                     {
2894                       addend = (addend ^ 0x80000000) - 0x80000000;
2895                       addend += 4;
2896                     }
2897                   break;
2898                 default:
2899                   abort ();
2900                 }
2901
2902               if (info->relocatable)
2903                 addend += sec->output_offset;
2904               else
2905                 {
2906                   asection *msec = sec;
2907                   addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2908                                                    addend);
2909                   addend -= relocation;
2910                   addend += msec->output_section->vma + msec->output_offset;
2911                 }
2912
2913               switch (howto->size)
2914                 {
2915                 case 0:
2916                   /* FIXME: overflow checks.  */
2917                   if (howto->pc_relative)
2918                     addend -= 1;
2919                   bfd_put_8 (input_bfd, addend, where);
2920                   break;
2921                 case 1:
2922                   if (howto->pc_relative)
2923                     addend -= 2;
2924                   bfd_put_16 (input_bfd, addend, where);
2925                   break;
2926                 case 2:
2927                   if (howto->pc_relative)
2928                     addend -= 4;
2929                   bfd_put_32 (input_bfd, addend, where);
2930                   break;
2931                 }
2932             }
2933           else if (!info->relocatable
2934                    && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2935             {
2936               /* Relocate against local STT_GNU_IFUNC symbol.  */
2937               h = elf_i386_get_local_sym_hash (htab, input_bfd,
2938                                                    rel, FALSE);
2939               if (h == NULL)
2940                 abort ();
2941
2942               /* Set STT_GNU_IFUNC symbol value.  */
2943               h->root.u.def.value = sym->st_value;
2944               h->root.u.def.section = sec;
2945             }
2946         }
2947       else
2948         {
2949           bfd_boolean warned ATTRIBUTE_UNUSED;
2950
2951           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2952                                    r_symndx, symtab_hdr, sym_hashes,
2953                                    h, sec, relocation,
2954                                    unresolved_reloc, warned);
2955         }
2956
2957       if (sec != NULL && elf_discarded_section (sec))
2958         {
2959           /* For relocs against symbols from removed linkonce sections,
2960              or sections discarded by a linker script, we just want the
2961              section contents zeroed.  Avoid any special processing.  */
2962           _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2963           rel->r_info = 0;
2964           rel->r_addend = 0;
2965           continue;
2966         }
2967
2968       if (info->relocatable)
2969         continue;
2970
2971       /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2972          it here if it is defined in a non-shared object.  */
2973       if (h != NULL
2974           && h->type == STT_GNU_IFUNC
2975           && h->def_regular)
2976         {
2977           asection *plt, *gotplt, *base_got;
2978           bfd_vma plt_index;
2979           const char *name;
2980
2981           if ((input_section->flags & SEC_ALLOC) == 0
2982               || h->plt.offset == (bfd_vma) -1)
2983             abort ();
2984
2985           /* STT_GNU_IFUNC symbol must go through PLT.  */
2986           if (htab->elf.splt != NULL)
2987             {
2988               plt = htab->elf.splt;
2989               gotplt = htab->elf.sgotplt;
2990             }
2991           else
2992             {
2993               plt = htab->elf.iplt;
2994               gotplt = htab->elf.igotplt;
2995             }
2996
2997           relocation = (plt->output_section->vma
2998                         + plt->output_offset + h->plt.offset);
2999
3000           switch (r_type)
3001             {
3002             default:
3003               if (h->root.root.string)
3004                 name = h->root.root.string;
3005               else
3006                 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3007                                          NULL);
3008               (*_bfd_error_handler)
3009                 (_("%B: relocation %s against STT_GNU_IFUNC "
3010                    "symbol `%s' isn't handled by %s"), input_bfd,
3011                  elf_howto_table[r_type].name,
3012                  name, __FUNCTION__);
3013               bfd_set_error (bfd_error_bad_value);
3014               return FALSE;
3015
3016             case R_386_32:
3017               /* Generate dynamic relcoation only when there is a
3018                  non-GOF reference in a shared object.  */
3019               if (info->shared && h->non_got_ref)
3020                 {
3021                   Elf_Internal_Rela outrel;
3022                   bfd_byte *loc;
3023                   asection *sreloc;
3024                   bfd_vma offset;
3025
3026                   /* Need a dynamic relocation to get the real function
3027                      adddress.  */
3028                   offset = _bfd_elf_section_offset (output_bfd,
3029                                                     info,
3030                                                     input_section,
3031                                                     rel->r_offset);
3032                   if (offset == (bfd_vma) -1
3033                       || offset == (bfd_vma) -2)
3034                     abort ();
3035
3036                   outrel.r_offset = (input_section->output_section->vma
3037                                      + input_section->output_offset
3038                                      + offset);
3039
3040                   if (h->dynindx == -1
3041                       || h->forced_local
3042                       || info->executable)
3043                     {
3044                       /* This symbol is resolved locally.  */
3045                       outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3046                       bfd_put_32 (output_bfd,
3047                                   (h->root.u.def.value
3048                                    + h->root.u.def.section->output_section->vma
3049                                    + h->root.u.def.section->output_offset),
3050                                   contents + offset);
3051                     }
3052                   else
3053                     outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3054
3055                   sreloc = htab->elf.irelifunc;
3056                   loc = sreloc->contents;
3057                   loc += (sreloc->reloc_count++
3058                           * sizeof (Elf32_External_Rel));
3059                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3060
3061                   /* If this reloc is against an external symbol, we
3062                      do not want to fiddle with the addend.  Otherwise,
3063                      we need to include the symbol value so that it
3064                      becomes an addend for the dynamic reloc.  For an
3065                      internal symbol, we have updated addend.  */
3066                   continue;
3067                 }
3068
3069             case R_386_PC32:
3070             case R_386_PLT32:
3071               goto do_relocation;
3072
3073             case R_386_GOT32:
3074               base_got = htab->elf.sgot;
3075               off = h->got.offset;
3076
3077               if (base_got == NULL)
3078                 abort ();
3079
3080               if (off == (bfd_vma) -1)
3081                 {
3082                   /* We can't use h->got.offset here to save state, or
3083                      even just remember the offset, as finish_dynamic_symbol
3084                      would use that as offset into .got.  */
3085
3086                   if (htab->elf.splt != NULL)
3087                     {
3088                       plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3089                       off = (plt_index + 3) * 4;
3090                       base_got = htab->elf.sgotplt;
3091                     }
3092                   else
3093                     {
3094                       plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3095                       off = plt_index * 4;
3096                       base_got = htab->elf.igotplt;
3097                     }
3098
3099                   if (h->dynindx == -1
3100                       || h->forced_local
3101                       || info->symbolic)
3102                     {
3103                       /* This references the local defitionion.  We must
3104                          initialize this entry in the global offset table.
3105                          Since the offset must always be a multiple of 8,
3106                          we use the least significant bit to record
3107                          whether we have initialized it already.
3108
3109                          When doing a dynamic link, we create a .rela.got
3110                          relocation entry to initialize the value.  This
3111                          is done in the finish_dynamic_symbol routine.   */
3112                       if ((off & 1) != 0)
3113                         off &= ~1;
3114                       else
3115                         {
3116                           bfd_put_32 (output_bfd, relocation,
3117                                       base_got->contents + off);
3118                           h->got.offset |= 1;
3119                         }
3120                     }
3121
3122                   relocation = off;
3123
3124                   /* Adjust for static executables.  */
3125                   if (htab->elf.splt == NULL)
3126                     relocation += gotplt->output_offset;
3127                 }
3128               else
3129                 {
3130                   relocation = (base_got->output_section->vma
3131                                 + base_got->output_offset + off
3132                                 - gotplt->output_section->vma
3133                                 - gotplt->output_offset);
3134                   /* Adjust for static executables.  */
3135                   if (htab->elf.splt == NULL)
3136                     relocation += gotplt->output_offset;
3137                 }
3138
3139               goto do_relocation;
3140
3141             case R_386_GOTOFF:
3142               relocation -= (gotplt->output_section->vma
3143                              + gotplt->output_offset);
3144               goto do_relocation;
3145             }
3146         }
3147
3148       switch (r_type)
3149         {
3150         case R_386_GOT32:
3151           /* Relocation is to the entry for this symbol in the global
3152              offset table.  */
3153           if (htab->elf.sgot == NULL)
3154             abort ();
3155
3156           if (h != NULL)
3157             {
3158               bfd_boolean dyn;
3159
3160               off = h->got.offset;
3161               dyn = htab->elf.dynamic_sections_created;
3162               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3163                   || (info->shared
3164                       && SYMBOL_REFERENCES_LOCAL (info, h))
3165                   || (ELF_ST_VISIBILITY (h->other)
3166                       && h->root.type == bfd_link_hash_undefweak))
3167                 {
3168                   /* This is actually a static link, or it is a
3169                      -Bsymbolic link and the symbol is defined
3170                      locally, or the symbol was forced to be local
3171                      because of a version file.  We must initialize
3172                      this entry in the global offset table.  Since the
3173                      offset must always be a multiple of 4, we use the
3174                      least significant bit to record whether we have
3175                      initialized it already.
3176
3177                      When doing a dynamic link, we create a .rel.got
3178                      relocation entry to initialize the value.  This
3179                      is done in the finish_dynamic_symbol routine.  */
3180                   if ((off & 1) != 0)
3181                     off &= ~1;
3182                   else
3183                     {
3184                       bfd_put_32 (output_bfd, relocation,
3185                                   htab->elf.sgot->contents + off);
3186                       h->got.offset |= 1;
3187                     }
3188                 }
3189               else
3190                 unresolved_reloc = FALSE;
3191             }
3192           else
3193             {
3194               if (local_got_offsets == NULL)
3195                 abort ();
3196
3197               off = local_got_offsets[r_symndx];
3198
3199               /* The offset must always be a multiple of 4.  We use
3200                  the least significant bit to record whether we have
3201                  already generated the necessary reloc.  */
3202               if ((off & 1) != 0)
3203                 off &= ~1;
3204               else
3205                 {
3206                   bfd_put_32 (output_bfd, relocation,
3207                               htab->elf.sgot->contents + off);
3208
3209                   if (info->shared)
3210                     {
3211                       asection *s;
3212                       Elf_Internal_Rela outrel;
3213                       bfd_byte *loc;
3214
3215                       s = htab->elf.srelgot;
3216                       if (s == NULL)
3217                         abort ();
3218
3219                       outrel.r_offset = (htab->elf.sgot->output_section->vma
3220                                          + htab->elf.sgot->output_offset
3221                                          + off);
3222                       outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3223                       loc = s->contents;
3224                       loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
3225                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3226                     }
3227
3228                   local_got_offsets[r_symndx] |= 1;
3229                 }
3230             }
3231
3232           if (off >= (bfd_vma) -2)
3233             abort ();
3234
3235           relocation = htab->elf.sgot->output_section->vma
3236                        + htab->elf.sgot->output_offset + off
3237                        - htab->elf.sgotplt->output_section->vma
3238                        - htab->elf.sgotplt->output_offset;
3239           break;
3240
3241         case R_386_GOTOFF:
3242           /* Relocation is relative to the start of the global offset
3243              table.  */
3244
3245           /* Check to make sure it isn't a protected function symbol
3246              for shared library since it may not be local when used
3247              as function address.  We also need to make sure that a
3248              symbol is defined locally.  */
3249           if (info->shared && h)
3250             {
3251               if (!h->def_regular)
3252                 {
3253                   const char *v;
3254
3255                   switch (ELF_ST_VISIBILITY (h->other))
3256                     {
3257                     case STV_HIDDEN:
3258                       v = _("hidden symbol");
3259                       break;
3260                     case STV_INTERNAL:
3261                       v = _("internal symbol");
3262                       break;
3263                     case STV_PROTECTED:
3264                       v = _("protected symbol");
3265                       break;
3266                     default:
3267                       v = _("symbol");
3268                       break;
3269                     }
3270
3271                   (*_bfd_error_handler)
3272                     (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3273                      input_bfd, v, h->root.root.string);
3274                   bfd_set_error (bfd_error_bad_value);
3275                   return FALSE;
3276                 }
3277               else if (!info->executable
3278                        && h->type == STT_FUNC
3279                        && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3280                 {
3281                   (*_bfd_error_handler)
3282                     (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3283                      input_bfd, h->root.root.string);
3284                   bfd_set_error (bfd_error_bad_value);
3285                   return FALSE;
3286                 }
3287             }
3288
3289           /* Note that sgot is not involved in this
3290              calculation.  We always want the start of .got.plt.  If we
3291              defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3292              permitted by the ABI, we might have to change this
3293              calculation.  */
3294           relocation -= htab->elf.sgotplt->output_section->vma
3295                         + htab->elf.sgotplt->output_offset;
3296           break;
3297
3298         case R_386_GOTPC:
3299           /* Use global offset table as symbol value.  */
3300           relocation = htab->elf.sgotplt->output_section->vma
3301                        + htab->elf.sgotplt->output_offset;
3302           unresolved_reloc = FALSE;
3303           break;
3304
3305         case R_386_PLT32:
3306           /* Relocation is to the entry for this symbol in the
3307              procedure linkage table.  */
3308
3309           /* Resolve a PLT32 reloc against a local symbol directly,
3310              without using the procedure linkage table.  */
3311           if (h == NULL)
3312             break;
3313
3314           if (h->plt.offset == (bfd_vma) -1
3315               || htab->elf.splt == NULL)
3316             {
3317               /* We didn't make a PLT entry for this symbol.  This
3318                  happens when statically linking PIC code, or when
3319                  using -Bsymbolic.  */
3320               break;
3321             }
3322
3323           relocation = (htab->elf.splt->output_section->vma
3324                         + htab->elf.splt->output_offset
3325                         + h->plt.offset);
3326           unresolved_reloc = FALSE;
3327           break;
3328
3329         case R_386_32:
3330         case R_386_PC32:
3331           if ((input_section->flags & SEC_ALLOC) == 0
3332               || is_vxworks_tls)
3333             break;
3334
3335           if ((info->shared
3336                && (h == NULL
3337                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3338                    || h->root.type != bfd_link_hash_undefweak)
3339                && (r_type != R_386_PC32
3340                    || !SYMBOL_CALLS_LOCAL (info, h)))
3341               || (ELIMINATE_COPY_RELOCS
3342                   && !info->shared
3343                   && h != NULL
3344                   && h->dynindx != -1
3345                   && !h->non_got_ref
3346                   && ((h->def_dynamic
3347                        && !h->def_regular)
3348                       || h->root.type == bfd_link_hash_undefweak
3349                       || h->root.type == bfd_link_hash_undefined)))
3350             {
3351               Elf_Internal_Rela outrel;
3352               bfd_byte *loc;
3353               bfd_boolean skip, relocate;
3354               asection *sreloc;
3355
3356               /* When generating a shared object, these relocations
3357                  are copied into the output file to be resolved at run
3358                  time.  */
3359
3360               skip = FALSE;
3361               relocate = FALSE;
3362
3363               outrel.r_offset =
3364                 _bfd_elf_section_offset (output_bfd, info, input_section,
3365                                          rel->r_offset);
3366               if (outrel.r_offset == (bfd_vma) -1)
3367                 skip = TRUE;
3368               else if (outrel.r_offset == (bfd_vma) -2)
3369                 skip = TRUE, relocate = TRUE;
3370               outrel.r_offset += (input_section->output_section->vma
3371                                   + input_section->output_offset);
3372
3373               if (skip)
3374                 memset (&outrel, 0, sizeof outrel);
3375               else if (h != NULL
3376                        && h->dynindx != -1
3377                        && (r_type == R_386_PC32
3378                            || !info->shared
3379                            || !SYMBOLIC_BIND (info, h)
3380                            || !h->def_regular))
3381                 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3382               else
3383                 {
3384                   /* This symbol is local, or marked to become local.  */
3385                   relocate = TRUE;
3386                   outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3387                 }
3388
3389               sreloc = elf_section_data (input_section)->sreloc;
3390
3391               BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
3392
3393               loc = sreloc->contents;
3394               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3395
3396               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3397
3398               /* If this reloc is against an external symbol, we do
3399                  not want to fiddle with the addend.  Otherwise, we
3400                  need to include the symbol value so that it becomes
3401                  an addend for the dynamic reloc.  */
3402               if (! relocate)
3403                 continue;
3404             }
3405           break;
3406
3407         case R_386_TLS_IE:
3408           if (!info->executable)
3409             {
3410               Elf_Internal_Rela outrel;
3411               bfd_byte *loc;
3412               asection *sreloc;
3413
3414               outrel.r_offset = rel->r_offset
3415                                 + input_section->output_section->vma
3416                                 + input_section->output_offset;
3417               outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3418               sreloc = elf_section_data (input_section)->sreloc;
3419               if (sreloc == NULL)
3420                 abort ();
3421               loc = sreloc->contents;
3422               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3423               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3424             }
3425           /* Fall through */
3426
3427         case R_386_TLS_GD:
3428         case R_386_TLS_GOTDESC:
3429         case R_386_TLS_DESC_CALL:
3430         case R_386_TLS_IE_32:
3431         case R_386_TLS_GOTIE:
3432           tls_type = GOT_UNKNOWN;
3433           if (h == NULL && local_got_offsets)
3434             tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3435           else if (h != NULL)
3436             tls_type = elf_i386_hash_entry(h)->tls_type;
3437           if (tls_type == GOT_TLS_IE)
3438             tls_type = GOT_TLS_IE_NEG;
3439
3440           if (! elf_i386_tls_transition (info, input_bfd,
3441                                          input_section, contents,
3442                                          symtab_hdr, sym_hashes,
3443                                          &r_type, tls_type, rel,
3444                                          relend, h, r_symndx))
3445             return FALSE;
3446
3447           if (r_type == R_386_TLS_LE_32)
3448             {
3449               BFD_ASSERT (! unresolved_reloc);
3450               if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3451                 {
3452                   unsigned int type;
3453                   bfd_vma roff;
3454
3455                   /* GD->LE transition.  */
3456                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3457                   if (type == 0x04)
3458                     {
3459                       /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3460                          Change it into:
3461                          movl %gs:0, %eax; subl $foo@tpoff, %eax
3462                          (6 byte form of subl).  */
3463                       memcpy (contents + rel->r_offset - 3,
3464                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3465                       roff = rel->r_offset + 5;
3466                     }
3467                   else
3468                     {
3469                       /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3470                          Change it into:
3471                          movl %gs:0, %eax; subl $foo@tpoff, %eax
3472                          (6 byte form of subl).  */
3473                       memcpy (contents + rel->r_offset - 2,
3474                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3475                       roff = rel->r_offset + 6;
3476                     }
3477                   bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3478                               contents + roff);
3479                   /* Skip R_386_PC32/R_386_PLT32.  */
3480                   rel++;
3481                   continue;
3482                 }
3483               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3484                 {
3485                   /* GDesc -> LE transition.
3486                      It's originally something like:
3487                      leal x@tlsdesc(%ebx), %eax
3488
3489                      leal x@ntpoff, %eax
3490
3491                      Registers other than %eax may be set up here.  */
3492
3493                   unsigned int val;
3494                   bfd_vma roff;
3495
3496                   roff = rel->r_offset;
3497                   val = bfd_get_8 (input_bfd, contents + roff - 1);
3498
3499                   /* Now modify the instruction as appropriate.  */
3500                   /* aoliva FIXME: remove the above and xor the byte
3501                      below with 0x86.  */
3502                   bfd_put_8 (output_bfd, val ^ 0x86,
3503                              contents + roff - 1);
3504                   bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3505                               contents + roff);
3506                   continue;
3507                 }
3508               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3509                 {
3510                   /* GDesc -> LE transition.
3511                      It's originally:
3512                      call *(%eax)
3513                      Turn it into:
3514                      xchg %ax,%ax  */
3515
3516                   bfd_vma roff;
3517
3518                   roff = rel->r_offset;
3519                   bfd_put_8 (output_bfd, 0x66, contents + roff);
3520                   bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3521                   continue;
3522                 }
3523               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3524                 {
3525                   unsigned int val;
3526
3527                   /* IE->LE transition:
3528                      Originally it can be one of:
3529                      movl foo, %eax
3530                      movl foo, %reg
3531                      addl foo, %reg
3532                      We change it into:
3533                      movl $foo, %eax
3534                      movl $foo, %reg
3535                      addl $foo, %reg.  */
3536                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3537                   if (val == 0xa1)
3538                     {
3539                       /* movl foo, %eax.  */
3540                       bfd_put_8 (output_bfd, 0xb8,
3541                                  contents + rel->r_offset - 1);
3542                     }
3543                   else
3544                     {
3545                       unsigned int type;
3546
3547                       type = bfd_get_8 (input_bfd,
3548                                         contents + rel->r_offset - 2);
3549                       switch (type)
3550                         {
3551                         case 0x8b:
3552                           /* movl */
3553                           bfd_put_8 (output_bfd, 0xc7,
3554                                      contents + rel->r_offset - 2);
3555                           bfd_put_8 (output_bfd,
3556                                      0xc0 | ((val >> 3) & 7),
3557                                      contents + rel->r_offset - 1);
3558                           break;
3559                         case 0x03:
3560                           /* addl */
3561                           bfd_put_8 (output_bfd, 0x81,
3562                                      contents + rel->r_offset - 2);
3563                           bfd_put_8 (output_bfd,
3564                                      0xc0 | ((val >> 3) & 7),
3565                                      contents + rel->r_offset - 1);
3566                           break;
3567                         default:
3568                           BFD_FAIL ();
3569                           break;
3570                         }
3571                     }
3572                   bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3573                               contents + rel->r_offset);
3574                   continue;
3575                 }
3576               else
3577                 {
3578                   unsigned int val, type;
3579
3580                   /* {IE_32,GOTIE}->LE transition:
3581                      Originally it can be one of:
3582                      subl foo(%reg1), %reg2
3583                      movl foo(%reg1), %reg2
3584                      addl foo(%reg1), %reg2
3585                      We change it into:
3586                      subl $foo, %reg2
3587                      movl $foo, %reg2 (6 byte form)
3588                      addl $foo, %reg2.  */
3589                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3590                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3591                   if (type == 0x8b)
3592                     {
3593                       /* movl */
3594                       bfd_put_8 (output_bfd, 0xc7,
3595                                  contents + rel->r_offset - 2);
3596                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3597                                  contents + rel->r_offset - 1);
3598                     }
3599                   else if (type == 0x2b)
3600                     {
3601                       /* subl */
3602                       bfd_put_8 (output_bfd, 0x81,
3603                                  contents + rel->r_offset - 2);
3604                       bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3605                                  contents + rel->r_offset - 1);
3606                     }
3607                   else if (type == 0x03)
3608                     {
3609                       /* addl */
3610                       bfd_put_8 (output_bfd, 0x81,
3611                                  contents + rel->r_offset - 2);
3612                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3613                                  contents + rel->r_offset - 1);
3614                     }
3615                   else
3616                     BFD_FAIL ();
3617                   if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3618                     bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3619                                 contents + rel->r_offset);
3620                   else
3621                     bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3622                                 contents + rel->r_offset);
3623                   continue;
3624                 }
3625             }
3626
3627           if (htab->elf.sgot == NULL)
3628             abort ();
3629
3630           if (h != NULL)
3631             {
3632               off = h->got.offset;
3633               offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3634             }
3635           else
3636             {
3637               if (local_got_offsets == NULL)
3638                 abort ();
3639
3640               off = local_got_offsets[r_symndx];
3641               offplt = local_tlsdesc_gotents[r_symndx];
3642             }
3643
3644           if ((off & 1) != 0)
3645             off &= ~1;
3646           else
3647             {
3648               Elf_Internal_Rela outrel;
3649               bfd_byte *loc;
3650               int dr_type;
3651               asection *sreloc;
3652
3653               if (htab->elf.srelgot == NULL)
3654                 abort ();
3655
3656               indx = h && h->dynindx != -1 ? h->dynindx : 0;
3657
3658               if (GOT_TLS_GDESC_P (tls_type))
3659                 {
3660                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3661                   BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3662                               <= htab->elf.sgotplt->size);
3663                   outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3664                                      + htab->elf.sgotplt->output_offset
3665                                      + offplt
3666                                      + htab->sgotplt_jump_table_size);
3667                   sreloc = htab->elf.srelplt;
3668                   loc = sreloc->contents;
3669                   loc += (htab->next_tls_desc_index++
3670                           * sizeof (Elf32_External_Rel));
3671                   BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3672                               <= sreloc->contents + sreloc->size);
3673                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3674                   if (indx == 0)
3675                     {
3676                       BFD_ASSERT (! unresolved_reloc);
3677                       bfd_put_32 (output_bfd,
3678                                   relocation - elf_i386_dtpoff_base (info),
3679                                   htab->elf.sgotplt->contents + offplt
3680                                   + htab->sgotplt_jump_table_size + 4);
3681                     }
3682                   else
3683                     {
3684                       bfd_put_32 (output_bfd, 0,
3685                                   htab->elf.sgotplt->contents + offplt
3686                                   + htab->sgotplt_jump_table_size + 4);
3687                     }
3688                 }
3689
3690               sreloc = htab->elf.srelgot;
3691
3692               outrel.r_offset = (htab->elf.sgot->output_section->vma
3693                                  + htab->elf.sgot->output_offset + off);
3694
3695               if (GOT_TLS_GD_P (tls_type))
3696                 dr_type = R_386_TLS_DTPMOD32;
3697               else if (GOT_TLS_GDESC_P (tls_type))
3698                 goto dr_done;
3699               else if (tls_type == GOT_TLS_IE_POS)
3700                 dr_type = R_386_TLS_TPOFF;
3701               else
3702                 dr_type = R_386_TLS_TPOFF32;
3703
3704               if (dr_type == R_386_TLS_TPOFF && indx == 0)
3705                 bfd_put_32 (output_bfd,
3706                             relocation - elf_i386_dtpoff_base (info),
3707                             htab->elf.sgot->contents + off);
3708               else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3709                 bfd_put_32 (output_bfd,
3710                             elf_i386_dtpoff_base (info) - relocation,
3711                             htab->elf.sgot->contents + off);
3712               else if (dr_type != R_386_TLS_DESC)
3713                 bfd_put_32 (output_bfd, 0,
3714                             htab->elf.sgot->contents + off);
3715               outrel.r_info = ELF32_R_INFO (indx, dr_type);
3716
3717               loc = sreloc->contents;
3718               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3719               BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3720                           <= sreloc->contents + sreloc->size);
3721               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3722
3723               if (GOT_TLS_GD_P (tls_type))
3724                 {
3725                   if (indx == 0)
3726                     {
3727                       BFD_ASSERT (! unresolved_reloc);
3728                       bfd_put_32 (output_bfd,
3729                                   relocation - elf_i386_dtpoff_base (info),
3730                                   htab->elf.sgot->contents + off + 4);
3731                     }
3732                   else
3733                     {
3734                       bfd_put_32 (output_bfd, 0,
3735                                   htab->elf.sgot->contents + off + 4);
3736                       outrel.r_info = ELF32_R_INFO (indx,
3737                                                     R_386_TLS_DTPOFF32);
3738                       outrel.r_offset += 4;
3739                       sreloc->reloc_count++;
3740                       loc += sizeof (Elf32_External_Rel);
3741                       BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3742                                   <= sreloc->contents + sreloc->size);
3743                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3744                     }
3745                 }
3746               else if (tls_type == GOT_TLS_IE_BOTH)
3747                 {
3748                   bfd_put_32 (output_bfd,
3749                               (indx == 0
3750                                ? relocation - elf_i386_dtpoff_base (info)
3751                                : 0),
3752                               htab->elf.sgot->contents + off + 4);
3753                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3754                   outrel.r_offset += 4;
3755                   sreloc->reloc_count++;
3756                   loc += sizeof (Elf32_External_Rel);
3757                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3758                 }
3759
3760             dr_done:
3761               if (h != NULL)
3762                 h->got.offset |= 1;
3763               else
3764                 local_got_offsets[r_symndx] |= 1;
3765             }
3766
3767           if (off >= (bfd_vma) -2
3768               && ! GOT_TLS_GDESC_P (tls_type))
3769             abort ();
3770           if (r_type == R_386_TLS_GOTDESC
3771               || r_type == R_386_TLS_DESC_CALL)
3772             {
3773               relocation = htab->sgotplt_jump_table_size + offplt;
3774               unresolved_reloc = FALSE;
3775             }
3776           else if (r_type == ELF32_R_TYPE (rel->r_info))
3777             {
3778               bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3779                               + htab->elf.sgotplt->output_offset;
3780               relocation = htab->elf.sgot->output_section->vma
3781                 + htab->elf.sgot->output_offset + off - g_o_t;
3782               if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3783                   && tls_type == GOT_TLS_IE_BOTH)
3784                 relocation += 4;
3785               if (r_type == R_386_TLS_IE)
3786                 relocation += g_o_t;
3787               unresolved_reloc = FALSE;
3788             }
3789           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3790             {
3791               unsigned int val, type;
3792               bfd_vma roff;
3793
3794               /* GD->IE transition.  */
3795               type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3796               val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3797               if (type == 0x04)
3798                 {
3799                   /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3800                      Change it into:
3801                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
3802                   val >>= 3;
3803                   roff = rel->r_offset - 3;
3804                 }
3805               else
3806                 {
3807                   /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3808                      Change it into:
3809                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
3810                   roff = rel->r_offset - 2;
3811                 }
3812               memcpy (contents + roff,
3813                       "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3814               contents[roff + 7] = 0x80 | (val & 7);
3815               /* If foo is used only with foo@gotntpoff(%reg) and
3816                  foo@indntpoff, but not with foo@gottpoff(%reg), change
3817                  subl $foo@gottpoff(%reg), %eax
3818                  into:
3819                  addl $foo@gotntpoff(%reg), %eax.  */
3820               if (tls_type == GOT_TLS_IE_POS)
3821                 contents[roff + 6] = 0x03;
3822               bfd_put_32 (output_bfd,
3823                           htab->elf.sgot->output_section->vma
3824                           + htab->elf.sgot->output_offset + off
3825                           - htab->elf.sgotplt->output_section->vma
3826                           - htab->elf.sgotplt->output_offset,
3827                           contents + roff + 8);
3828               /* Skip R_386_PLT32.  */
3829               rel++;
3830               continue;
3831             }
3832           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3833             {
3834               /* GDesc -> IE transition.
3835                  It's originally something like:
3836                  leal x@tlsdesc(%ebx), %eax
3837
3838                  Change it to:
3839                  movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3840                  or:
3841                  movl x@gottpoff(%ebx), %eax # before negl %eax
3842
3843                  Registers other than %eax may be set up here.  */
3844
3845               bfd_vma roff;
3846
3847               /* First, make sure it's a leal adding ebx to a 32-bit
3848                  offset into any register, although it's probably
3849                  almost always going to be eax.  */
3850               roff = rel->r_offset;
3851
3852               /* Now modify the instruction as appropriate.  */
3853               /* To turn a leal into a movl in the form we use it, it
3854                  suffices to change the first byte from 0x8d to 0x8b.
3855                  aoliva FIXME: should we decide to keep the leal, all
3856                  we have to do is remove the statement below, and
3857                  adjust the relaxation of R_386_TLS_DESC_CALL.  */
3858               bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3859
3860               if (tls_type == GOT_TLS_IE_BOTH)
3861                 off += 4;
3862
3863               bfd_put_32 (output_bfd,
3864                           htab->elf.sgot->output_section->vma
3865                           + htab->elf.sgot->output_offset + off
3866                           - htab->elf.sgotplt->output_section->vma
3867                           - htab->elf.sgotplt->output_offset,
3868                           contents + roff);
3869               continue;
3870             }
3871           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3872             {
3873               /* GDesc -> IE transition.
3874                  It's originally:
3875                  call *(%eax)
3876
3877                  Change it to:
3878                  xchg %ax,%ax
3879                  or
3880                  negl %eax
3881                  depending on how we transformed the TLS_GOTDESC above.
3882               */
3883
3884               bfd_vma roff;
3885
3886               roff = rel->r_offset;
3887
3888               /* Now modify the instruction as appropriate.  */
3889               if (tls_type != GOT_TLS_IE_NEG)
3890                 {
3891                   /* xchg %ax,%ax */
3892                   bfd_put_8 (output_bfd, 0x66, contents + roff);
3893                   bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3894                 }
3895               else
3896                 {
3897                   /* negl %eax */
3898                   bfd_put_8 (output_bfd, 0xf7, contents + roff);
3899                   bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3900                 }
3901
3902               continue;
3903             }
3904           else
3905             BFD_ASSERT (FALSE);
3906           break;
3907
3908         case R_386_TLS_LDM:
3909           if (! elf_i386_tls_transition (info, input_bfd,
3910                                          input_section, contents,
3911                                          symtab_hdr, sym_hashes,
3912                                          &r_type, GOT_UNKNOWN, rel,
3913                                          relend, h, r_symndx))
3914             return FALSE;
3915
3916           if (r_type != R_386_TLS_LDM)
3917             {
3918               /* LD->LE transition:
3919                  leal foo(%reg), %eax; call ___tls_get_addr.
3920                  We change it into:
3921                  movl %gs:0, %eax; nop; leal 0(%esi,1), %esi.  */
3922               BFD_ASSERT (r_type == R_386_TLS_LE_32);
3923               memcpy (contents + rel->r_offset - 2,
3924                       "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3925               /* Skip R_386_PC32/R_386_PLT32.  */
3926               rel++;
3927               continue;
3928             }
3929
3930           if (htab->elf.sgot == NULL)
3931             abort ();
3932
3933           off = htab->tls_ldm_got.offset;
3934           if (off & 1)
3935             off &= ~1;
3936           else
3937             {
3938               Elf_Internal_Rela outrel;
3939               bfd_byte *loc;
3940
3941               if (htab->elf.srelgot == NULL)
3942                 abort ();
3943
3944               outrel.r_offset = (htab->elf.sgot->output_section->vma
3945                                  + htab->elf.sgot->output_offset + off);
3946
3947               bfd_put_32 (output_bfd, 0,
3948                           htab->elf.sgot->contents + off);
3949               bfd_put_32 (output_bfd, 0,
3950                           htab->elf.sgot->contents + off + 4);
3951               outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3952               loc = htab->elf.srelgot->contents;
3953               loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3954               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3955               htab->tls_ldm_got.offset |= 1;
3956             }
3957           relocation = htab->elf.sgot->output_section->vma
3958                        + htab->elf.sgot->output_offset + off
3959                        - htab->elf.sgotplt->output_section->vma
3960                        - htab->elf.sgotplt->output_offset;
3961           unresolved_reloc = FALSE;
3962           break;
3963
3964         case R_386_TLS_LDO_32:
3965           if (info->shared || (input_section->flags & SEC_CODE) == 0)
3966             relocation -= elf_i386_dtpoff_base (info);
3967           else
3968             /* When converting LDO to LE, we must negate.  */
3969             relocation = -elf_i386_tpoff (info, relocation);
3970           break;
3971
3972         case R_386_TLS_LE_32:
3973         case R_386_TLS_LE:
3974           if (!info->executable)
3975             {
3976               Elf_Internal_Rela outrel;
3977               asection *sreloc;
3978               bfd_byte *loc;
3979
3980               outrel.r_offset = rel->r_offset
3981                                 + input_section->output_section->vma
3982                                 + input_section->output_offset;
3983               if (h != NULL && h->dynindx != -1)
3984                 indx = h->dynindx;
3985               else
3986                 indx = 0;
3987               if (r_type == R_386_TLS_LE_32)
3988                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3989               else
3990                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3991               sreloc = elf_section_data (input_section)->sreloc;
3992               if (sreloc == NULL)
3993                 abort ();
3994               loc = sreloc->contents;
3995               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3996               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3997               if (indx)
3998                 continue;
3999               else if (r_type == R_386_TLS_LE_32)
4000                 relocation = elf_i386_dtpoff_base (info) - relocation;
4001               else
4002                 relocation -= elf_i386_dtpoff_base (info);
4003             }
4004           else if (r_type == R_386_TLS_LE_32)
4005             relocation = elf_i386_tpoff (info, relocation);
4006           else
4007             relocation = -elf_i386_tpoff (info, relocation);
4008           break;
4009
4010         default:
4011           break;
4012         }
4013
4014       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4015          because such sections are not SEC_ALLOC and thus ld.so will
4016          not process them.  */
4017       if (unresolved_reloc
4018           && !((input_section->flags & SEC_DEBUGGING) != 0
4019                && h->def_dynamic))
4020         {
4021           (*_bfd_error_handler)
4022             (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4023              input_bfd,
4024              input_section,
4025              (long) rel->r_offset,
4026              howto->name,
4027              h->root.root.string);
4028           return FALSE;
4029         }
4030
4031 do_relocation:
4032       r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4033                                     contents, rel->r_offset,
4034                                     relocation, 0);
4035
4036       if (r != bfd_reloc_ok)
4037         {
4038           const char *name;
4039
4040           if (h != NULL)
4041             name = h->root.root.string;
4042           else
4043             {
4044               name = bfd_elf_string_from_elf_section (input_bfd,
4045                                                       symtab_hdr->sh_link,
4046                                                       sym->st_name);
4047               if (name == NULL)
4048                 return FALSE;
4049               if (*name == '\0')
4050                 name = bfd_section_name (input_bfd, sec);
4051             }
4052
4053           if (r == bfd_reloc_overflow)
4054             {
4055               if (! ((*info->callbacks->reloc_overflow)
4056                      (info, (h ? &h->root : NULL), name, howto->name,
4057                       (bfd_vma) 0, input_bfd, input_section,
4058                       rel->r_offset)))
4059                 return FALSE;
4060             }
4061           else
4062             {
4063               (*_bfd_error_handler)
4064                 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4065                  input_bfd, input_section,
4066                  (long) rel->r_offset, name, (int) r);
4067               return FALSE;
4068             }
4069         }
4070     }
4071
4072   return TRUE;
4073 }
4074
4075 /* Finish up dynamic symbol handling.  We set the contents of various
4076    dynamic sections here.  */
4077
4078 static bfd_boolean
4079 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4080                                 struct bfd_link_info *info,
4081                                 struct elf_link_hash_entry *h,
4082                                 Elf_Internal_Sym *sym)
4083 {
4084   struct elf_i386_link_hash_table *htab;
4085
4086   htab = elf_i386_hash_table (info);
4087   if (htab == NULL)
4088     return FALSE;
4089
4090   if (h->plt.offset != (bfd_vma) -1)
4091     {
4092       bfd_vma plt_index;
4093       bfd_vma got_offset;
4094       Elf_Internal_Rela rel;
4095       bfd_byte *loc;
4096       asection *plt, *gotplt, *relplt;
4097
4098       /* When building a static executable, use .iplt, .igot.plt and
4099          .rel.iplt sections for STT_GNU_IFUNC symbols.  */
4100       if (htab->elf.splt != NULL)
4101         {
4102           plt = htab->elf.splt;
4103           gotplt = htab->elf.sgotplt;
4104           relplt = htab->elf.srelplt;
4105         }
4106       else
4107         {
4108           plt = htab->elf.iplt;
4109           gotplt = htab->elf.igotplt;
4110           relplt = htab->elf.irelplt;
4111         }
4112
4113       /* This symbol has an entry in the procedure linkage table.  Set
4114          it up.  */
4115
4116       if ((h->dynindx == -1
4117            && !((h->forced_local || info->executable)
4118                 && h->def_regular
4119                 && h->type == STT_GNU_IFUNC))
4120           || plt == NULL
4121           || gotplt == NULL
4122           || relplt == NULL)
4123         abort ();
4124
4125       /* Get the index in the procedure linkage table which
4126          corresponds to this symbol.  This is the index of this symbol
4127          in all the symbols for which we are making plt entries.  The
4128          first entry in the procedure linkage table is reserved.
4129
4130          Get the offset into the .got table of the entry that
4131          corresponds to this function.  Each .got entry is 4 bytes.
4132          The first three are reserved.
4133
4134          For static executables, we don't reserve anything.  */
4135
4136       if (plt == htab->elf.splt)
4137         {
4138           plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
4139           got_offset = (plt_index + 3) * 4;
4140         }
4141       else
4142         {
4143           plt_index = h->plt.offset / PLT_ENTRY_SIZE;
4144           got_offset = plt_index * 4;
4145         }
4146
4147       /* Fill in the entry in the procedure linkage table.  */
4148       if (! info->shared)
4149         {
4150           memcpy (plt->contents + h->plt.offset, elf_i386_plt_entry,
4151                   PLT_ENTRY_SIZE);
4152           bfd_put_32 (output_bfd,
4153                       (gotplt->output_section->vma
4154                        + gotplt->output_offset
4155                        + got_offset),
4156                       plt->contents + h->plt.offset + 2);
4157
4158           if (htab->is_vxworks)
4159             {
4160               int s, k, reloc_index;
4161
4162               /* Create the R_386_32 relocation referencing the GOT
4163                  for this PLT entry.  */
4164
4165               /* S: Current slot number (zero-based).  */
4166               s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
4167               /* K: Number of relocations for PLTResolve. */
4168               if (info->shared)
4169                 k = PLTRESOLVE_RELOCS_SHLIB;
4170               else
4171                 k = PLTRESOLVE_RELOCS;
4172               /* Skip the PLTresolve relocations, and the relocations for
4173                  the other PLT slots. */
4174               reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4175               loc = (htab->srelplt2->contents + reloc_index
4176                      * sizeof (Elf32_External_Rel));
4177
4178               rel.r_offset = (htab->elf.splt->output_section->vma
4179                               + htab->elf.splt->output_offset
4180                               + h->plt.offset + 2),
4181               rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4182               bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4183
4184               /* Create the R_386_32 relocation referencing the beginning of
4185                  the PLT for this GOT entry.  */
4186               rel.r_offset = (htab->elf.sgotplt->output_section->vma
4187                               + htab->elf.sgotplt->output_offset
4188                               + got_offset);
4189               rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4190               bfd_elf32_swap_reloc_out (output_bfd, &rel,
4191               loc + sizeof (Elf32_External_Rel));
4192             }
4193         }
4194       else
4195         {
4196           memcpy (plt->contents + h->plt.offset, elf_i386_pic_plt_entry,
4197                   PLT_ENTRY_SIZE);
4198           bfd_put_32 (output_bfd, got_offset,
4199                       plt->contents + h->plt.offset + 2);
4200         }
4201
4202       /* Don't fill PLT entry for static executables.  */
4203       if (plt == htab->elf.splt)
4204         {
4205           bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4206                       plt->contents + h->plt.offset + 7);
4207           bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
4208                       plt->contents + h->plt.offset + 12);
4209         }
4210
4211       /* Fill in the entry in the global offset table.  */
4212       bfd_put_32 (output_bfd,
4213                   (plt->output_section->vma
4214                    + plt->output_offset
4215                    + h->plt.offset
4216                    + 6),
4217                   gotplt->contents + got_offset);
4218
4219       /* Fill in the entry in the .rel.plt section.  */
4220       rel.r_offset = (gotplt->output_section->vma
4221                       + gotplt->output_offset
4222                       + got_offset);
4223       if (h->dynindx == -1
4224           || ((info->executable
4225                || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4226               && h->def_regular
4227                && h->type == STT_GNU_IFUNC))
4228         {
4229           /* If an STT_GNU_IFUNC symbol is locally defined, generate
4230              R_386_IRELATIVE instead of R_386_JUMP_SLOT.  Store addend
4231              in the .got.plt section.  */
4232           bfd_put_32 (output_bfd,
4233                       (h->root.u.def.value
4234                        + h->root.u.def.section->output_section->vma
4235                        + h->root.u.def.section->output_offset),
4236                       gotplt->contents + got_offset);
4237           rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4238         }
4239       else
4240         rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4241       loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4242       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4243
4244       if (!h->def_regular)
4245         {
4246           /* Mark the symbol as undefined, rather than as defined in
4247              the .plt section.  Leave the value if there were any
4248              relocations where pointer equality matters (this is a clue
4249              for the dynamic linker, to make function pointer
4250              comparisons work between an application and shared
4251              library), otherwise set it to zero.  If a function is only
4252              called from a binary, there is no need to slow down
4253              shared libraries because of that.  */
4254           sym->st_shndx = SHN_UNDEF;
4255           if (!h->pointer_equality_needed)
4256             sym->st_value = 0;
4257         }
4258     }
4259
4260   if (h->got.offset != (bfd_vma) -1
4261       && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4262       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4263     {
4264       Elf_Internal_Rela rel;
4265       bfd_byte *loc;
4266
4267       /* This symbol has an entry in the global offset table.  Set it
4268          up.  */
4269
4270       if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4271         abort ();
4272
4273       rel.r_offset = (htab->elf.sgot->output_section->vma
4274                       + htab->elf.sgot->output_offset
4275                       + (h->got.offset & ~(bfd_vma) 1));
4276
4277       /* If this is a static link, or it is a -Bsymbolic link and the
4278          symbol is defined locally or was forced to be local because
4279          of a version file, we just want to emit a RELATIVE reloc.
4280          The entry in the global offset table will already have been
4281          initialized in the relocate_section function.  */
4282       if (h->def_regular
4283           && h->type == STT_GNU_IFUNC)
4284         {
4285           if (info->shared)
4286             {
4287               /* Generate R_386_GLOB_DAT.  */
4288               goto do_glob_dat;
4289             }
4290           else
4291             {
4292               asection *plt;
4293
4294               if (!h->pointer_equality_needed)
4295                 abort ();
4296
4297               /* For non-shared object, we can't use .got.plt, which
4298                  contains the real function addres if we need pointer
4299                  equality.  We load the GOT entry with the PLT entry.  */
4300               plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4301               bfd_put_32 (output_bfd,
4302                           (plt->output_section->vma
4303                            + plt->output_offset + h->plt.offset),
4304                           htab->elf.sgot->contents + h->got.offset);
4305               return TRUE;
4306             }
4307         }
4308       else if (info->shared
4309                && SYMBOL_REFERENCES_LOCAL (info, h))
4310         {
4311           BFD_ASSERT((h->got.offset & 1) != 0);
4312           rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4313         }
4314       else
4315         {
4316           BFD_ASSERT((h->got.offset & 1) == 0);
4317 do_glob_dat:
4318           bfd_put_32 (output_bfd, (bfd_vma) 0,
4319                       htab->elf.sgot->contents + h->got.offset);
4320           rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4321         }
4322
4323       loc = htab->elf.srelgot->contents;
4324       loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4325       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4326     }
4327
4328   if (h->needs_copy)
4329     {
4330       Elf_Internal_Rela rel;
4331       bfd_byte *loc;
4332
4333       /* This symbol needs a copy reloc.  Set it up.  */
4334
4335       if (h->dynindx == -1
4336           || (h->root.type != bfd_link_hash_defined
4337               && h->root.type != bfd_link_hash_defweak)
4338           || htab->srelbss == NULL)
4339         abort ();
4340
4341       rel.r_offset = (h->root.u.def.value
4342                       + h->root.u.def.section->output_section->vma
4343                       + h->root.u.def.section->output_offset);
4344       rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4345       loc = htab->srelbss->contents;
4346       loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
4347       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4348     }
4349
4350   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  SYM may
4351      be NULL for local symbols.
4352
4353      On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4354      is relative to the ".got" section.  */
4355   if (sym != NULL
4356       && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4357           || (!htab->is_vxworks && h == htab->elf.hgot)))
4358     sym->st_shndx = SHN_ABS;
4359
4360   return TRUE;
4361 }
4362
4363 /* Finish up local dynamic symbol handling.  We set the contents of
4364    various dynamic sections here.  */
4365
4366 static bfd_boolean
4367 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4368 {
4369   struct elf_link_hash_entry *h
4370     = (struct elf_link_hash_entry *) *slot;
4371   struct bfd_link_info *info
4372     = (struct bfd_link_info *) inf;
4373
4374   return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4375                                          h, NULL);
4376 }
4377
4378 /* Used to decide how to sort relocs in an optimal manner for the
4379    dynamic linker, before writing them out.  */
4380
4381 static enum elf_reloc_type_class
4382 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
4383 {
4384   switch (ELF32_R_TYPE (rela->r_info))
4385     {
4386     case R_386_RELATIVE:
4387       return reloc_class_relative;
4388     case R_386_JUMP_SLOT:
4389       return reloc_class_plt;
4390     case R_386_COPY:
4391       return reloc_class_copy;
4392     default:
4393       return reloc_class_normal;
4394     }
4395 }
4396
4397 /* Finish up the dynamic sections.  */
4398
4399 static bfd_boolean
4400 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4401                                   struct bfd_link_info *info)
4402 {
4403   struct elf_i386_link_hash_table *htab;
4404   bfd *dynobj;
4405   asection *sdyn;
4406
4407   htab = elf_i386_hash_table (info);
4408   if (htab == NULL)
4409     return FALSE;
4410
4411   dynobj = htab->elf.dynobj;
4412   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4413
4414   if (htab->elf.dynamic_sections_created)
4415     {
4416       Elf32_External_Dyn *dyncon, *dynconend;
4417
4418       if (sdyn == NULL || htab->elf.sgot == NULL)
4419         abort ();
4420
4421       dyncon = (Elf32_External_Dyn *) sdyn->contents;
4422       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4423       for (; dyncon < dynconend; dyncon++)
4424         {
4425           Elf_Internal_Dyn dyn;
4426           asection *s;
4427
4428           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4429
4430           switch (dyn.d_tag)
4431             {
4432             default:
4433               if (htab->is_vxworks
4434                   && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4435                 break;
4436               continue;
4437
4438             case DT_PLTGOT:
4439               s = htab->elf.sgotplt;
4440               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4441               break;
4442
4443             case DT_JMPREL:
4444               s = htab->elf.srelplt;
4445               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4446               break;
4447
4448             case DT_PLTRELSZ:
4449               s = htab->elf.srelplt;
4450               dyn.d_un.d_val = s->size;
4451               break;
4452
4453             case DT_RELSZ:
4454               /* My reading of the SVR4 ABI indicates that the
4455                  procedure linkage table relocs (DT_JMPREL) should be
4456                  included in the overall relocs (DT_REL).  This is
4457                  what Solaris does.  However, UnixWare can not handle
4458                  that case.  Therefore, we override the DT_RELSZ entry
4459                  here to make it not include the JMPREL relocs.  */
4460               s = htab->elf.srelplt;
4461               if (s == NULL)
4462                 continue;
4463               dyn.d_un.d_val -= s->size;
4464               break;
4465
4466             case DT_REL:
4467               /* We may not be using the standard ELF linker script.
4468                  If .rel.plt is the first .rel section, we adjust
4469                  DT_REL to not include it.  */
4470               s = htab->elf.srelplt;
4471               if (s == NULL)
4472                 continue;
4473               if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4474                 continue;
4475               dyn.d_un.d_ptr += s->size;
4476               break;
4477             }
4478
4479           bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4480         }
4481
4482       /* Fill in the first entry in the procedure linkage table.  */
4483       if (htab->elf.splt && htab->elf.splt->size > 0)
4484         {
4485           if (info->shared)
4486             {
4487               memcpy (htab->elf.splt->contents, elf_i386_pic_plt0_entry,
4488                       sizeof (elf_i386_pic_plt0_entry));
4489               memset (htab->elf.splt->contents + sizeof (elf_i386_pic_plt0_entry),
4490                       htab->plt0_pad_byte,
4491                       PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
4492             }
4493           else
4494             {
4495               memcpy (htab->elf.splt->contents, elf_i386_plt0_entry,
4496                       sizeof(elf_i386_plt0_entry));
4497               memset (htab->elf.splt->contents + sizeof (elf_i386_plt0_entry),
4498                       htab->plt0_pad_byte,
4499                       PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
4500               bfd_put_32 (output_bfd,
4501                           (htab->elf.sgotplt->output_section->vma
4502                            + htab->elf.sgotplt->output_offset
4503                            + 4),
4504                           htab->elf.splt->contents + 2);
4505               bfd_put_32 (output_bfd,
4506                           (htab->elf.sgotplt->output_section->vma
4507                            + htab->elf.sgotplt->output_offset
4508                            + 8),
4509                           htab->elf.splt->contents + 8);
4510
4511               if (htab->is_vxworks)
4512                 {
4513                   Elf_Internal_Rela rel;
4514
4515                   /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4516                      On IA32 we use REL relocations so the addend goes in
4517                      the PLT directly.  */
4518                   rel.r_offset = (htab->elf.splt->output_section->vma
4519                                   + htab->elf.splt->output_offset
4520                                   + 2);
4521                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4522                   bfd_elf32_swap_reloc_out (output_bfd, &rel,
4523                                             htab->srelplt2->contents);
4524                   /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8.  */
4525                   rel.r_offset = (htab->elf.splt->output_section->vma
4526                                   + htab->elf.splt->output_offset
4527                                   + 8);
4528                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4529                   bfd_elf32_swap_reloc_out (output_bfd, &rel,
4530                                             htab->srelplt2->contents +
4531                                             sizeof (Elf32_External_Rel));
4532                 }
4533             }
4534
4535           /* UnixWare sets the entsize of .plt to 4, although that doesn't
4536              really seem like the right value.  */
4537           elf_section_data (htab->elf.splt->output_section)
4538             ->this_hdr.sh_entsize = 4;
4539
4540           /* Correct the .rel.plt.unloaded relocations.  */
4541           if (htab->is_vxworks && !info->shared)
4542             {
4543               int num_plts = (htab->elf.splt->size / PLT_ENTRY_SIZE) - 1;
4544               unsigned char *p;
4545
4546               p = htab->srelplt2->contents;
4547               if (info->shared)
4548                 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4549               else
4550                 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4551
4552               for (; num_plts; num_plts--)
4553                 {
4554                   Elf_Internal_Rela rel;
4555                   bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4556                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4557                   bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4558                   p += sizeof (Elf32_External_Rel);
4559
4560                   bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4561                   rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4562                   bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4563                   p += sizeof (Elf32_External_Rel);
4564                 }
4565             }
4566         }
4567     }
4568
4569   if (htab->elf.sgotplt)
4570     {
4571       /* Fill in the first three entries in the global offset table.  */
4572       if (htab->elf.sgotplt->size > 0)
4573         {
4574           bfd_put_32 (output_bfd,
4575                       (sdyn == NULL ? 0
4576                        : sdyn->output_section->vma + sdyn->output_offset),
4577                       htab->elf.sgotplt->contents);
4578           bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4579           bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4580         }
4581
4582       elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4583     }
4584
4585   if (htab->elf.sgot && htab->elf.sgot->size > 0)
4586     elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4587
4588   /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols.  */
4589   htab_traverse (htab->loc_hash_table,
4590                  elf_i386_finish_local_dynamic_symbol,
4591                  info);
4592
4593   return TRUE;
4594 }
4595
4596 /* Return address for Ith PLT stub in section PLT, for relocation REL
4597    or (bfd_vma) -1 if it should not be included.  */
4598
4599 static bfd_vma
4600 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4601                       const arelent *rel ATTRIBUTE_UNUSED)
4602 {
4603   return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4604 }
4605
4606 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section.  */
4607
4608 static bfd_boolean
4609 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
4610 {
4611   if (h->plt.offset != (bfd_vma) -1
4612       && !h->def_regular
4613       && !h->pointer_equality_needed)
4614     return FALSE;
4615
4616   return _bfd_elf_hash_symbol (h);
4617 }
4618
4619 /* Hook called by the linker routine which adds symbols from an object
4620    file.  */
4621
4622 static bfd_boolean
4623 elf_i386_add_symbol_hook (bfd * abfd,
4624                           struct bfd_link_info * info ATTRIBUTE_UNUSED,
4625                           Elf_Internal_Sym * sym,
4626                           const char ** namep ATTRIBUTE_UNUSED,
4627                           flagword * flagsp ATTRIBUTE_UNUSED,
4628                           asection ** secp ATTRIBUTE_UNUSED,
4629                           bfd_vma * valp ATTRIBUTE_UNUSED)
4630 {
4631   if ((abfd->flags & DYNAMIC) == 0
4632       && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4633     elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4634
4635   return TRUE;
4636 }
4637
4638 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vec
4639 #define TARGET_LITTLE_NAME              "elf32-i386"
4640 #define ELF_ARCH                        bfd_arch_i386
4641 #define ELF_MACHINE_CODE                EM_386
4642 #define ELF_MAXPAGESIZE                 0x1000
4643
4644 #define elf_backend_can_gc_sections     1
4645 #define elf_backend_can_refcount        1
4646 #define elf_backend_want_got_plt        1
4647 #define elf_backend_plt_readonly        1
4648 #define elf_backend_want_plt_sym        0
4649 #define elf_backend_got_header_size     12
4650
4651 /* Support RELA for objdump of prelink objects.  */
4652 #define elf_info_to_howto                     elf_i386_info_to_howto_rel
4653 #define elf_info_to_howto_rel                 elf_i386_info_to_howto_rel
4654
4655 #define bfd_elf32_mkobject                    elf_i386_mkobject
4656
4657 #define bfd_elf32_bfd_is_local_label_name     elf_i386_is_local_label_name
4658 #define bfd_elf32_bfd_link_hash_table_create  elf_i386_link_hash_table_create
4659 #define bfd_elf32_bfd_link_hash_table_free    elf_i386_link_hash_table_free
4660 #define bfd_elf32_bfd_reloc_type_lookup       elf_i386_reloc_type_lookup
4661 #define bfd_elf32_bfd_reloc_name_lookup       elf_i386_reloc_name_lookup
4662
4663 #define elf_backend_adjust_dynamic_symbol     elf_i386_adjust_dynamic_symbol
4664 #define elf_backend_relocs_compatible         _bfd_elf_relocs_compatible
4665 #define elf_backend_check_relocs              elf_i386_check_relocs
4666 #define elf_backend_copy_indirect_symbol      elf_i386_copy_indirect_symbol
4667 #define elf_backend_create_dynamic_sections   elf_i386_create_dynamic_sections
4668 #define elf_backend_fake_sections             elf_i386_fake_sections
4669 #define elf_backend_finish_dynamic_sections   elf_i386_finish_dynamic_sections
4670 #define elf_backend_finish_dynamic_symbol     elf_i386_finish_dynamic_symbol
4671 #define elf_backend_gc_mark_hook              elf_i386_gc_mark_hook
4672 #define elf_backend_gc_sweep_hook             elf_i386_gc_sweep_hook
4673 #define elf_backend_grok_prstatus             elf_i386_grok_prstatus
4674 #define elf_backend_grok_psinfo               elf_i386_grok_psinfo
4675 #define elf_backend_reloc_type_class          elf_i386_reloc_type_class
4676 #define elf_backend_relocate_section          elf_i386_relocate_section
4677 #define elf_backend_size_dynamic_sections     elf_i386_size_dynamic_sections
4678 #define elf_backend_always_size_sections      elf_i386_always_size_sections
4679 #define elf_backend_omit_section_dynsym \
4680   ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4681 #define elf_backend_plt_sym_val               elf_i386_plt_sym_val
4682 #define elf_backend_hash_symbol               elf_i386_hash_symbol
4683 #define elf_backend_add_symbol_hook           elf_i386_add_symbol_hook
4684 #undef  elf_backend_post_process_headers
4685 #define elf_backend_post_process_headers        _bfd_elf_set_osabi
4686
4687 #include "elf32-target.h"
4688
4689 /* FreeBSD support.  */
4690
4691 #undef  TARGET_LITTLE_SYM
4692 #define TARGET_LITTLE_SYM               bfd_elf32_i386_freebsd_vec
4693 #undef  TARGET_LITTLE_NAME
4694 #define TARGET_LITTLE_NAME              "elf32-i386-freebsd"
4695 #undef  ELF_OSABI
4696 #define ELF_OSABI                       ELFOSABI_FREEBSD
4697
4698 /* The kernel recognizes executables as valid only if they carry a
4699    "FreeBSD" label in the ELF header.  So we put this label on all
4700    executables and (for simplicity) also all other object files.  */
4701
4702 static void
4703 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4704 {
4705   _bfd_elf_set_osabi (abfd, info);
4706
4707 #ifdef OLD_FREEBSD_ABI_LABEL
4708   /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
4709   memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4710 #endif
4711 }
4712
4713 #undef  elf_backend_post_process_headers
4714 #define elf_backend_post_process_headers        elf_i386_fbsd_post_process_headers
4715 #undef  elf32_bed
4716 #define elf32_bed                               elf32_i386_fbsd_bed
4717
4718 #undef elf_backend_add_symbol_hook
4719
4720 #include "elf32-target.h"
4721
4722 /* Solaris 2.  */
4723
4724 #undef  TARGET_LITTLE_SYM
4725 #define TARGET_LITTLE_SYM               bfd_elf32_i386_sol2_vec
4726 #undef  TARGET_LITTLE_NAME
4727 #define TARGET_LITTLE_NAME              "elf32-i386-sol2"
4728
4729 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4730    objects won't be recognized.  */
4731 #undef ELF_OSABI
4732
4733 #undef  elf32_bed
4734 #define elf32_bed                       elf32_i386_sol2_bed
4735
4736 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4737
4738    Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4739    File, p.63.  */
4740 #undef elf_backend_want_plt_sym
4741 #define elf_backend_want_plt_sym        1
4742
4743 #include "elf32-target.h"
4744
4745 /* VxWorks support.  */
4746
4747 #undef  TARGET_LITTLE_SYM
4748 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vxworks_vec
4749 #undef  TARGET_LITTLE_NAME
4750 #define TARGET_LITTLE_NAME              "elf32-i386-vxworks"
4751 #undef  ELF_OSABI
4752
4753 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks.  */
4754
4755 static struct bfd_link_hash_table *
4756 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4757 {
4758   struct bfd_link_hash_table *ret;
4759   struct elf_i386_link_hash_table *htab;
4760
4761   ret = elf_i386_link_hash_table_create (abfd);
4762   if (ret)
4763     {
4764       htab = (struct elf_i386_link_hash_table *) ret;
4765       htab->is_vxworks = 1;
4766       htab->plt0_pad_byte = 0x90;
4767     }
4768
4769   return ret;
4770 }
4771
4772
4773 #undef elf_backend_relocs_compatible
4774 #undef elf_backend_post_process_headers
4775 #undef bfd_elf32_bfd_link_hash_table_create
4776 #define bfd_elf32_bfd_link_hash_table_create \
4777   elf_i386_vxworks_link_hash_table_create
4778 #undef elf_backend_add_symbol_hook
4779 #define elf_backend_add_symbol_hook \
4780   elf_vxworks_add_symbol_hook
4781 #undef elf_backend_link_output_symbol_hook
4782 #define elf_backend_link_output_symbol_hook \
4783   elf_vxworks_link_output_symbol_hook
4784 #undef elf_backend_emit_relocs
4785 #define elf_backend_emit_relocs                 elf_vxworks_emit_relocs
4786 #undef elf_backend_final_write_processing
4787 #define elf_backend_final_write_processing \
4788   elf_vxworks_final_write_processing
4789
4790 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4791    define it.  */
4792 #undef elf_backend_want_plt_sym
4793 #define elf_backend_want_plt_sym        1
4794
4795 #undef  elf32_bed
4796 #define elf32_bed                               elf32_i386_vxworks_bed
4797
4798 #include "elf32-target.h"