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 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 /* The i386 linker needs to keep track of the number of relocs that it
 581    decides to copy as dynamic relocs in check_relocs for each symbol.
 582    This is so that it can later discard them if they are found to be
 583    unnecessary.  We store the information in a field extending the
 584    regular ELF linker hash table.  */
 585
 586 struct elf_i386_dyn_relocs
 587 {
 588   struct elf_i386_dyn_relocs *next;
 589
 590   /* The input section of the reloc.  */
 591   asection *sec;
 592
 593   /* Total number of relocs copied for the input section.  */
 594   bfd_size_type count;
 595
 596   /* Number of pc-relative relocs copied for the input section.  */
 597   bfd_size_type pc_count;
 598 };
 599
 600 /* i386 ELF linker hash entry.  */
 601
 602 struct elf_i386_link_hash_entry
 603 {
 604   struct elf_link_hash_entry elf;
 605
 606   /* Track dynamic relocs copied for this symbol.  */
 607   struct elf_i386_dyn_relocs *dyn_relocs;
 608
 609 #define GOT_UNKNOWN     0
 610 #define GOT_NORMAL      1
 611 #define GOT_TLS_GD      2
 612 #define GOT_TLS_IE      4
 613 #define GOT_TLS_IE_POS  5
 614 #define GOT_TLS_IE_NEG  6
 615 #define GOT_TLS_IE_BOTH 7
 616 #define GOT_TLS_GDESC   8
 617 #define GOT_TLS_GD_BOTH_P(type)                                         \
 618   ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
 619 #define GOT_TLS_GD_P(type)                                              \
 620   ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
 621 #define GOT_TLS_GDESC_P(type)                                           \
 622   ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
 623 #define GOT_TLS_GD_ANY_P(type)                                          \
 624   (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
 625   unsigned char tls_type;
 626
 627   /* Offset of the GOTPLT entry reserved for the TLS descriptor,
 628      starting at the end of the jump table.  */
 629   bfd_vma tlsdesc_got;
 630 };
 631
 632 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
 633
 634 struct elf_i386_obj_tdata
 635 {
 636   struct elf_obj_tdata root;
 637
 638   /* tls_type for each local got entry.  */
 639   char *local_got_tls_type;
 640
 641   /* GOTPLT entries for TLS descriptors.  */
 642   bfd_vma *local_tlsdesc_gotent;
 643 };
 644
 645 #define elf_i386_tdata(abfd) \
 646   ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
 647
 648 #define elf_i386_local_got_tls_type(abfd) \
 649   (elf_i386_tdata (abfd)->local_got_tls_type)
 650
 651 #define elf_i386_local_tlsdesc_gotent(abfd) \
 652   (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
 653
 654 #define is_i386_elf(bfd)                                \
 655   (bfd_get_flavour (bfd) == bfd_target_elf_flavour      \
 656    && elf_tdata (bfd) != NULL                           \
 657    && elf_object_id (bfd) == I386_ELF_TDATA)
 658
 659 static bfd_boolean
 660 elf_i386_mkobject (bfd *abfd)
 661 {
 662   return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
 663                                   I386_ELF_TDATA);
 664 }
 665
 666 /* i386 ELF linker hash table.  */
 667
 668 struct elf_i386_link_hash_table
 669 {
 670   struct elf_link_hash_table elf;
 671
 672   /* Short-cuts to get to dynamic linker sections.  */
 673   asection *sdynbss;
 674   asection *srelbss;
 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   /* Value used to fill the last word of the first plt entry.  */
 683   bfd_byte plt0_pad_byte;
 684
 685   /* The index of the next unused R_386_TLS_DESC slot in .rel.plt.  */
 686   bfd_vma next_tls_desc_index;
 687
 688   union {
 689     bfd_signed_vma refcount;
 690     bfd_vma offset;
 691   } tls_ldm_got;
 692
 693   /* The amount of space used by the reserved portion of the sgotplt
 694      section, plus whatever space is used by the jump slots.  */
 695   bfd_vma sgotplt_jump_table_size;
 696
 697   /* Small local sym to section mapping cache.  */
 698   struct sym_sec_cache sym_sec;
 699
 700   /* _TLS_MODULE_BASE_ symbol.  */
 701   struct bfd_link_hash_entry *tls_module_base;
 702
 703   /* Used by local STT_GNU_IFUNC symbols.  */
 704   htab_t loc_hash_table;
 705   void *loc_hash_memory;
 706 };
 707
 708 /* Get the i386 ELF linker hash table from a link_info structure.  */
 709
 710 #define elf_i386_hash_table(p) \
 711   ((struct elf_i386_link_hash_table *) ((p)->hash))
 712
 713 #define elf_i386_compute_jump_table_size(htab) \
 714   ((htab)->next_tls_desc_index * 4)
 715
 716 /* Create an entry in an i386 ELF linker hash table.  */
 717
 718 static struct bfd_hash_entry *
 719 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
 720                             struct bfd_hash_table *table,
 721                             const char *string)
 722 {
 723   /* Allocate the structure if it has not already been allocated by a
 724      subclass.  */
 725   if (entry == NULL)
 726     {
 727       entry = bfd_hash_allocate (table,
 728                                  sizeof (struct elf_i386_link_hash_entry));
 729       if (entry == NULL)
 730         return entry;
 731     }
 732
 733   /* Call the allocation method of the superclass.  */
 734   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 735   if (entry != NULL)
 736     {
 737       struct elf_i386_link_hash_entry *eh;
 738
 739       eh = (struct elf_i386_link_hash_entry *) entry;
 740       eh->dyn_relocs = NULL;
 741       eh->tls_type = GOT_UNKNOWN;
 742       eh->tlsdesc_got = (bfd_vma) -1;
 743     }
 744
 745   return entry;
 746 }
 747
 748 static hashval_t
 749 elf_i386_local_hash (int id, int r_sym)
 750 {
 751   return ((((id & 0xff) << 24) | ((id & 0xff00) << 8))
 752           ^ r_sym ^ (id >> 16));
 753 }
 754
 755 /* Compute a hash of a local hash entry.  We use elf_link_hash_entry
 756   for local symbol so that we can handle local STT_GNU_IFUNC symbols
 757   as global symbol.  We reuse indx and dynstr_index for local symbol
 758   hash since they aren't used by global symbols in this backend.  */
 759
 760 static hashval_t
 761 elf_i386_local_htab_hash (const void *ptr)
 762 {
 763   struct elf_link_hash_entry *h
 764     = (struct elf_link_hash_entry *) ptr;
 765   return elf_i386_local_hash (h->indx, h->dynstr_index);
 766 }
 767
 768 /* Compare local hash entries.  */
 769
 770 static int
 771 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
 772 {
 773   struct elf_link_hash_entry *h1
 774      = (struct elf_link_hash_entry *) ptr1;
 775   struct elf_link_hash_entry *h2
 776     = (struct elf_link_hash_entry *) ptr2;
 777
 778   return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
 779 }
 780
 781 /* Find and/or create a hash entry for local symbol.  */
 782
 783 static struct elf_link_hash_entry *
 784 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
 785                              bfd *abfd, const Elf_Internal_Rela *rel,
 786                              bfd_boolean create)
 787 {
 788   struct elf_i386_link_hash_entry e, *ret;
 789   asection *sec = abfd->sections;
 790   hashval_t h = elf_i386_local_hash (sec->id,
 791                                      ELF32_R_SYM (rel->r_info));
 792   void **slot;
 793
 794   e.elf.indx = sec->id;
 795   e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
 796   slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
 797                                    create ? INSERT : NO_INSERT);
 798
 799   if (!slot)
 800     return NULL;
 801
 802   if (*slot)
 803     {
 804       ret = (struct elf_i386_link_hash_entry *) *slot;
 805       return &ret->elf;
 806     }
 807
 808   ret = (struct elf_i386_link_hash_entry *)
 809         objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
 810                         sizeof (struct elf_i386_link_hash_entry));
 811   if (ret)
 812     {
 813       memset (ret, 0, sizeof (*ret));
 814       ret->elf.indx = sec->id;
 815       ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
 816       ret->elf.dynindx = -1;
 817       ret->elf.plt.offset = (bfd_vma) -1;
 818       ret->elf.got.offset = (bfd_vma) -1;
 819       *slot = ret;
 820     }
 821   return &ret->elf;
 822 }
 823
 824 /* Create an i386 ELF linker hash table.  */
 825
 826 static struct bfd_link_hash_table *
 827 elf_i386_link_hash_table_create (bfd *abfd)
 828 {
 829   struct elf_i386_link_hash_table *ret;
 830   bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
 831
 832   ret = bfd_malloc (amt);
 833   if (ret == NULL)
 834     return NULL;
 835
 836   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
 837                                       elf_i386_link_hash_newfunc,
 838                                       sizeof (struct elf_i386_link_hash_entry)))
 839     {
 840       free (ret);
 841       return NULL;
 842     }
 843
 844   ret->sdynbss = NULL;
 845   ret->srelbss = NULL;
 846   ret->tls_ldm_got.refcount = 0;
 847   ret->next_tls_desc_index = 0;
 848   ret->sgotplt_jump_table_size = 0;
 849   ret->sym_sec.abfd = NULL;
 850   ret->is_vxworks = 0;
 851   ret->srelplt2 = NULL;
 852   ret->plt0_pad_byte = 0;
 853   ret->tls_module_base = NULL;
 854
 855   ret->loc_hash_table = htab_try_create (1024,
 856                                          elf_i386_local_htab_hash,
 857                                          elf_i386_local_htab_eq,
 858                                          NULL);
 859   ret->loc_hash_memory = objalloc_create ();
 860   if (!ret->loc_hash_table || !ret->loc_hash_memory)
 861     {
 862       free (ret);
 863       return NULL;
 864     }
 865
 866   return &ret->elf.root;
 867 }
 868
 869 /* Destroy an i386 ELF linker hash table.  */
 870
 871 static void
 872 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
 873 {
 874   struct elf_i386_link_hash_table *htab
 875     = (struct elf_i386_link_hash_table *) hash;
 876
 877   if (htab->loc_hash_table)
 878     htab_delete (htab->loc_hash_table);
 879   if (htab->loc_hash_memory)
 880     objalloc_free ((struct objalloc *) htab->loc_hash_memory);
 881   _bfd_generic_link_hash_table_free (hash);
 882 }
 883
 884 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
 885    .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
 886    hash table.  */
 887
 888 static bfd_boolean
 889 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
 890 {
 891   struct elf_i386_link_hash_table *htab;
 892
 893   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 894     return FALSE;
 895
 896   htab = elf_i386_hash_table (info);
 897   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 898   if (!info->shared)
 899     htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
 900
 901   if (!htab->sdynbss
 902       || (!info->shared && !htab->srelbss))
 903     abort ();
 904
 905   if (htab->is_vxworks
 906       && !elf_vxworks_create_dynamic_sections (dynobj, info,
 907                                                &htab->srelplt2))
 908     return FALSE;
 909
 910   return TRUE;
 911 }
 912
 913 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 914
 915 static void
 916 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
 917                                struct elf_link_hash_entry *dir,
 918                                struct elf_link_hash_entry *ind)
 919 {
 920   struct elf_i386_link_hash_entry *edir, *eind;
 921
 922   edir = (struct elf_i386_link_hash_entry *) dir;
 923   eind = (struct elf_i386_link_hash_entry *) ind;
 924
 925   if (eind->dyn_relocs != NULL)
 926     {
 927       if (edir->dyn_relocs != NULL)
 928         {
 929           struct elf_i386_dyn_relocs **pp;
 930           struct elf_i386_dyn_relocs *p;
 931
 932           /* Add reloc counts against the indirect sym to the direct sym
 933              list.  Merge any entries against the same section.  */
 934           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 935             {
 936               struct elf_i386_dyn_relocs *q;
 937
 938               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 939                 if (q->sec == p->sec)
 940                   {
 941                     q->pc_count += p->pc_count;
 942                     q->count += p->count;
 943                     *pp = p->next;
 944                     break;
 945                   }
 946               if (q == NULL)
 947                 pp = &p->next;
 948             }
 949           *pp = edir->dyn_relocs;
 950         }
 951
 952       edir->dyn_relocs = eind->dyn_relocs;
 953       eind->dyn_relocs = NULL;
 954     }
 955
 956   if (ind->root.type == bfd_link_hash_indirect
 957       && dir->got.refcount <= 0)
 958     {
 959       edir->tls_type = eind->tls_type;
 960       eind->tls_type = GOT_UNKNOWN;
 961     }
 962
 963   if (ELIMINATE_COPY_RELOCS
 964       && ind->root.type != bfd_link_hash_indirect
 965       && dir->dynamic_adjusted)
 966     {
 967       /* If called to transfer flags for a weakdef during processing
 968          of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 969          We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 970       dir->ref_dynamic |= ind->ref_dynamic;
 971       dir->ref_regular |= ind->ref_regular;
 972       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
 973       dir->needs_plt |= ind->needs_plt;
 974       dir->pointer_equality_needed |= ind->pointer_equality_needed;
 975     }
 976   else
 977     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 978 }
 979
 980 typedef union
 981   {
 982     unsigned char c[2];
 983     uint16_t i;
 984   }
 985 i386_opcode16;
 986
 987 /* Return TRUE if the TLS access code sequence support transition
 988    from R_TYPE.  */
 989
 990 static bfd_boolean
 991 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
 992                                bfd_byte *contents,
 993                                Elf_Internal_Shdr *symtab_hdr,
 994                                struct elf_link_hash_entry **sym_hashes,
 995                                unsigned int r_type,
 996                                const Elf_Internal_Rela *rel,
 997                                const Elf_Internal_Rela *relend)
 998 {
 999   unsigned int val, type;
1000   unsigned long r_symndx;
1001   struct elf_link_hash_entry *h;
1002   bfd_vma offset;
1003
1004   /* Get the section contents.  */
1005   if (contents == NULL)
1006     {
1007       if (elf_section_data (sec)->this_hdr.contents != NULL)
1008         contents = elf_section_data (sec)->this_hdr.contents;
1009       else
1010         {
1011           /* FIXME: How to better handle error condition?  */
1012           if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1013             return FALSE;
1014
1015           /* Cache the section contents for elf_link_input_bfd.  */
1016           elf_section_data (sec)->this_hdr.contents = contents;
1017         }
1018     }
1019
1020   offset = rel->r_offset;
1021   switch (r_type)
1022     {
1023     case R_386_TLS_GD:
1024     case R_386_TLS_LDM:
1025       if (offset < 2 || (rel + 1) >= relend)
1026         return FALSE;
1027
1028       type = bfd_get_8 (abfd, contents + offset - 2);
1029       if (r_type == R_386_TLS_GD)
1030         {
1031           /* Check transition from GD access model.  Only
1032                 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1033                 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1034              can transit to different access model.  */
1035           if ((offset + 10) > sec->size ||
1036               (type != 0x8d && type != 0x04))
1037             return FALSE;
1038
1039           val = bfd_get_8 (abfd, contents + offset - 1);
1040           if (type == 0x04)
1041             {
1042               /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1043               if (offset < 3)
1044                 return FALSE;
1045
1046               if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1047                 return FALSE;
1048
1049               if ((val & 0xc7) != 0x05 || val == (4 << 3))
1050                 return FALSE;
1051             }
1052           else
1053             {
1054               /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop  */
1055               if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1056                 return FALSE;
1057
1058               if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1059                 return FALSE;
1060             }
1061         }
1062       else
1063         {
1064           /* Check transition from LD access model.  Only
1065                 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1066              can transit to different access model.  */
1067           if (type != 0x8d || (offset + 9) > sec->size)
1068             return FALSE;
1069
1070           val = bfd_get_8 (abfd, contents + offset - 1);
1071           if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1072             return FALSE;
1073         }
1074
1075       if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1076         return FALSE;
1077
1078       r_symndx = ELF32_R_SYM (rel[1].r_info);
1079       if (r_symndx < symtab_hdr->sh_info)
1080         return FALSE;
1081
1082       h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1083       /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1084          may be versioned.  */
1085       return (h != NULL
1086               && h->root.root.string != NULL
1087               && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1088                   || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1089               && (strncmp (h->root.root.string, "___tls_get_addr",
1090                            15) == 0));
1091
1092     case R_386_TLS_IE:
1093       /* Check transition from IE access model:
1094                 movl foo@indntpoff(%rip), %eax
1095                 movl foo@indntpoff(%rip), %reg
1096                 addl foo@indntpoff(%rip), %reg
1097        */
1098
1099       if (offset < 1 || (offset + 4) > sec->size)
1100         return FALSE;
1101
1102       /* Check "movl foo@tpoff(%rip), %eax" first.  */
1103       val = bfd_get_8 (abfd, contents + offset - 1);
1104       if (val == 0xa1)
1105         return TRUE;
1106
1107       if (offset < 2)
1108         return FALSE;
1109
1110       /* Check movl|addl foo@tpoff(%rip), %reg.   */
1111       type = bfd_get_8 (abfd, contents + offset - 2);
1112       return ((type == 0x8b || type == 0x03)
1113               && (val & 0xc7) == 0x05);
1114
1115     case R_386_TLS_GOTIE:
1116     case R_386_TLS_IE_32:
1117       /* Check transition from {IE_32,GOTIE} access model:
1118                 subl foo@{tpoff,gontoff}(%reg1), %reg2
1119                 movl foo@{tpoff,gontoff}(%reg1), %reg2
1120                 addl foo@{tpoff,gontoff}(%reg1), %reg2
1121        */
1122
1123       if (offset < 2 || (offset + 4) > sec->size)
1124         return FALSE;
1125
1126       val = bfd_get_8 (abfd, contents + offset - 1);
1127       if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1128         return FALSE;
1129
1130       type = bfd_get_8 (abfd, contents + offset - 2);
1131       return type == 0x8b || type == 0x2b || type == 0x03;
1132
1133     case R_386_TLS_GOTDESC:
1134       /* Check transition from GDesc access model:
1135                 leal x@tlsdesc(%ebx), %eax
1136
1137          Make sure it's a leal adding ebx to a 32-bit offset
1138          into any register, although it's probably almost always
1139          going to be eax.  */
1140
1141       if (offset < 2 || (offset + 4) > sec->size)
1142         return FALSE;
1143
1144       if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1145         return FALSE;
1146
1147       val = bfd_get_8 (abfd, contents + offset - 1);
1148       return (val & 0xc7) == 0x83;
1149
1150     case R_386_TLS_DESC_CALL:
1151       /* Check transition from GDesc access model:
1152                 call *x@tlsdesc(%rax)
1153        */
1154       if (offset + 2 <= sec->size)
1155         {
1156           /* Make sure that it's a call *x@tlsdesc(%rax).  */
1157           static i386_opcode16 call = { { 0xff, 0x10 } };
1158           return bfd_get_16 (abfd, contents + offset) == call.i;
1159         }
1160
1161       return FALSE;
1162
1163     default:
1164       abort ();
1165     }
1166 }
1167
1168 /* Return TRUE if the TLS access transition is OK or no transition
1169    will be performed.  Update R_TYPE if there is a transition.  */
1170
1171 static bfd_boolean
1172 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1173                          asection *sec, bfd_byte *contents,
1174                          Elf_Internal_Shdr *symtab_hdr,
1175                          struct elf_link_hash_entry **sym_hashes,
1176                          unsigned int *r_type, int tls_type,
1177                          const Elf_Internal_Rela *rel,
1178                          const Elf_Internal_Rela *relend,
1179                          struct elf_link_hash_entry *h)
1180 {
1181   unsigned int from_type = *r_type;
1182   unsigned int to_type = from_type;
1183   bfd_boolean check = TRUE;
1184
1185   switch (from_type)
1186     {
1187     case R_386_TLS_GD:
1188     case R_386_TLS_GOTDESC:
1189     case R_386_TLS_DESC_CALL:
1190     case R_386_TLS_IE_32:
1191     case R_386_TLS_IE:
1192     case R_386_TLS_GOTIE:
1193       if (!info->shared)
1194         {
1195           if (h == NULL)
1196             to_type = R_386_TLS_LE_32;
1197           else if (from_type != R_386_TLS_IE
1198                    && from_type != R_386_TLS_GOTIE)
1199             to_type = R_386_TLS_IE_32;
1200         }
1201
1202       /* When we are called from elf_i386_relocate_section, CONTENTS
1203          isn't NULL and there may be additional transitions based on
1204          TLS_TYPE.  */
1205       if (contents != NULL)
1206         {
1207           unsigned int new_to_type = to_type;
1208
1209           if (!info->shared
1210               && h != NULL
1211               && h->dynindx == -1
1212               && (tls_type & GOT_TLS_IE))
1213             new_to_type = R_386_TLS_LE_32;
1214
1215           if (to_type == R_386_TLS_GD
1216               || to_type == R_386_TLS_GOTDESC
1217               || to_type == R_386_TLS_DESC_CALL)
1218             {
1219               if (tls_type == GOT_TLS_IE_POS)
1220                 new_to_type = R_386_TLS_GOTIE;
1221               else if (tls_type & GOT_TLS_IE)
1222                 new_to_type = R_386_TLS_IE_32;
1223             }
1224
1225           /* We checked the transition before when we were called from
1226              elf_i386_check_relocs.  We only want to check the new
1227              transition which hasn't been checked before.  */
1228           check = new_to_type != to_type && from_type == to_type;
1229           to_type = new_to_type;
1230         }
1231
1232       break;
1233
1234     case R_386_TLS_LDM:
1235       if (!info->shared)
1236         to_type = R_386_TLS_LE_32;
1237       break;
1238
1239     default:
1240       return TRUE;
1241     }
1242
1243   /* Return TRUE if there is no transition.  */
1244   if (from_type == to_type)
1245     return TRUE;
1246
1247   /* Check if the transition can be performed.  */
1248   if (check
1249       && ! elf_i386_check_tls_transition (abfd, sec, contents,
1250                                           symtab_hdr, sym_hashes,
1251                                           from_type, rel, relend))
1252     {
1253       reloc_howto_type *from, *to;
1254
1255       from = elf_i386_rtype_to_howto (abfd, from_type);
1256       to = elf_i386_rtype_to_howto (abfd, to_type);
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,
1262          h ? h->root.root.string : "a local symbol",
1263          (unsigned long) rel->r_offset);
1264       bfd_set_error (bfd_error_bad_value);
1265       return FALSE;
1266     }
1267
1268   *r_type = to_type;
1269   return TRUE;
1270 }
1271
1272 /* Look through the relocs for a section during the first phase, and
1273    calculate needed space in the global offset table, procedure linkage
1274    table, and dynamic reloc sections.  */
1275
1276 static bfd_boolean
1277 elf_i386_check_relocs (bfd *abfd,
1278                        struct bfd_link_info *info,
1279                        asection *sec,
1280                        const Elf_Internal_Rela *relocs)
1281 {
1282   struct elf_i386_link_hash_table *htab;
1283   Elf_Internal_Shdr *symtab_hdr;
1284   struct elf_link_hash_entry **sym_hashes;
1285   const Elf_Internal_Rela *rel;
1286   const Elf_Internal_Rela *rel_end;
1287   asection *sreloc;
1288   Elf_Internal_Sym *isymbuf;
1289
1290   if (info->relocatable)
1291     return TRUE;
1292
1293   BFD_ASSERT (is_i386_elf (abfd));
1294
1295   htab = elf_i386_hash_table (info);
1296   symtab_hdr = &elf_symtab_hdr (abfd);
1297   isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
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
1309       r_symndx = ELF32_R_SYM (rel->r_info);
1310       r_type = ELF32_R_TYPE (rel->r_info);
1311
1312       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1313         {
1314           (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1315                                  abfd,
1316                                  r_symndx);
1317           return FALSE;
1318         }
1319
1320       if (r_symndx < symtab_hdr->sh_info)
1321         {
1322           /* A local symbol.  */
1323           Elf_Internal_Sym *isym;
1324
1325           /* Read this BFD's local symbols.  */
1326           if (isymbuf == NULL)
1327             {
1328               if (isymbuf == NULL)
1329                 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1330                                                 symtab_hdr->sh_info, 0,
1331                                                 NULL, NULL, NULL);
1332               if (isymbuf == NULL)
1333                   return FALSE;
1334             }
1335
1336           /* Check relocation against local STT_GNU_IFUNC symbol.  */
1337           isym = isymbuf + r_symndx;
1338           if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1339             {
1340               h = elf_i386_get_local_sym_hash (htab, abfd, rel,
1341                                                    TRUE);
1342               if (h == NULL)
1343                 return FALSE;
1344
1345               /* Fake a STT_GNU_IFUNC symbol.  */
1346               h->type = STT_GNU_IFUNC;
1347               h->def_regular = 1;
1348               h->ref_regular = 1;
1349               h->forced_local = 1;
1350               h->root.type = bfd_link_hash_defined;
1351             }
1352           else
1353             h = NULL;
1354         }
1355       else
1356         {
1357           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1358           while (h->root.type == bfd_link_hash_indirect
1359                  || h->root.type == bfd_link_hash_warning)
1360             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1361         }
1362
1363       if (h != NULL)
1364         {
1365           /* Create the ifunc sections for static executables.  If we
1366              never see an indirect function symbol nor we are building
1367              a static executable, those sections will be empty and
1368              won't appear in output.  */
1369           switch (r_type)
1370             {
1371             default:
1372               break;
1373
1374             case R_386_32:
1375             case R_386_PC32:
1376             case R_386_PLT32:
1377             case R_386_GOT32:
1378             case R_386_GOTOFF:
1379               if (!_bfd_elf_create_ifunc_sections (abfd, info))
1380                 return FALSE;
1381               break;
1382             }
1383
1384           /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1385              it here if it is defined in a non-shared object.  */
1386           if (h->type == STT_GNU_IFUNC
1387               && h->def_regular)
1388             {
1389               /* It is referenced by a non-shared object. */
1390               h->ref_regular = 1;
1391
1392               /* STT_GNU_IFUNC symbol must go through PLT.  */
1393               h->plt.refcount += 1;
1394
1395               /* STT_GNU_IFUNC needs dynamic sections.  */
1396               if (htab->elf.dynobj == NULL)
1397                 htab->elf.dynobj = abfd;
1398
1399               switch (r_type)
1400                 {
1401                 default:
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                      (h->root.root.string
1407                       ? h->root.root.string : "a local symbol"),
1408                      __FUNCTION__);
1409                   bfd_set_error (bfd_error_bad_value);
1410                   return FALSE;
1411
1412                 case R_386_32:
1413                   h->non_got_ref = 1;
1414                   h->pointer_equality_needed = 1;
1415                   if (info->shared)
1416                     {
1417                       struct elf_i386_dyn_relocs *p;
1418                       struct elf_i386_dyn_relocs **head;
1419
1420                       /* We must copy these reloc types into the
1421                          output file.  Create a reloc section in
1422                          dynobj and make room for this reloc.  */
1423                       if (sreloc == NULL)
1424                         {
1425                           if (htab->elf.dynobj == NULL)
1426                             htab->elf.dynobj = abfd;
1427
1428                           sreloc = _bfd_elf_make_dynamic_reloc_section
1429                             (sec, htab->elf.dynobj, 2, abfd, FALSE);
1430
1431                           if (sreloc == NULL)
1432                             return FALSE;
1433                         }
1434
1435                       head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1436                       p = *head;
1437                       if (p == NULL || p->sec != sec)
1438                         {
1439                           bfd_size_type amt = sizeof *p;
1440                           p = bfd_alloc (htab->elf.dynobj, amt);
1441                           if (p == NULL)
1442                             return FALSE;
1443                           p->next = *head;
1444                           *head = p;
1445                           p->sec = sec;
1446                           p->count = 0;
1447                           p->pc_count = 0;
1448                         }
1449                       p->count += 1;
1450                     }
1451                   break;
1452
1453                 case R_386_PC32:
1454                   h->non_got_ref = 1;
1455                   break;
1456
1457                 case R_386_PLT32:
1458                   break;
1459
1460                 case R_386_GOT32:
1461                 case R_386_GOTOFF:
1462                   h->got.refcount += 1;
1463                   if (htab->elf.sgot == NULL
1464                       && !_bfd_elf_create_got_section (htab->elf.dynobj,
1465                                                        info))
1466                     return FALSE;
1467                   break;
1468                 }
1469
1470               continue;
1471             }
1472         }
1473
1474       if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1475                                      symtab_hdr, sym_hashes,
1476                                      &r_type, GOT_UNKNOWN,
1477                                      rel, rel_end, h))
1478         return FALSE;
1479
1480       switch (r_type)
1481         {
1482         case R_386_TLS_LDM:
1483           htab->tls_ldm_got.refcount += 1;
1484           goto create_got;
1485
1486         case R_386_PLT32:
1487           /* This symbol requires a procedure linkage table entry.  We
1488              actually build the entry in adjust_dynamic_symbol,
1489              because this might be a case of linking PIC code which is
1490              never referenced by a dynamic object, in which case we
1491              don't need to generate a procedure linkage table entry
1492              after all.  */
1493
1494           /* If this is a local symbol, we resolve it directly without
1495              creating a procedure linkage table entry.  */
1496           if (h == NULL)
1497             continue;
1498
1499           h->needs_plt = 1;
1500           h->plt.refcount += 1;
1501           break;
1502
1503         case R_386_TLS_IE_32:
1504         case R_386_TLS_IE:
1505         case R_386_TLS_GOTIE:
1506           if (info->shared)
1507             info->flags |= DF_STATIC_TLS;
1508           /* Fall through */
1509
1510         case R_386_GOT32:
1511         case R_386_TLS_GD:
1512         case R_386_TLS_GOTDESC:
1513         case R_386_TLS_DESC_CALL:
1514           /* This symbol requires a global offset table entry.  */
1515           {
1516             int tls_type, old_tls_type;
1517
1518             switch (r_type)
1519               {
1520               default:
1521               case R_386_GOT32: tls_type = GOT_NORMAL; break;
1522               case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1523               case R_386_TLS_GOTDESC:
1524               case R_386_TLS_DESC_CALL:
1525                 tls_type = GOT_TLS_GDESC; break;
1526               case R_386_TLS_IE_32:
1527                 if (ELF32_R_TYPE (rel->r_info) == r_type)
1528                   tls_type = GOT_TLS_IE_NEG;
1529                 else
1530                   /* If this is a GD->IE transition, we may use either of
1531                      R_386_TLS_TPOFF and R_386_TLS_TPOFF32.  */
1532                   tls_type = GOT_TLS_IE;
1533                 break;
1534               case R_386_TLS_IE:
1535               case R_386_TLS_GOTIE:
1536                 tls_type = GOT_TLS_IE_POS; break;
1537               }
1538
1539             if (h != NULL)
1540               {
1541                 h->got.refcount += 1;
1542                 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1543               }
1544             else
1545               {
1546                 bfd_signed_vma *local_got_refcounts;
1547
1548                 /* This is a global offset table entry for a local symbol.  */
1549                 local_got_refcounts = elf_local_got_refcounts (abfd);
1550                 if (local_got_refcounts == NULL)
1551                   {
1552                     bfd_size_type size;
1553
1554                     size = symtab_hdr->sh_info;
1555                     size *= (sizeof (bfd_signed_vma)
1556                              + sizeof (bfd_vma) + sizeof(char));
1557                     local_got_refcounts = bfd_zalloc (abfd, size);
1558                     if (local_got_refcounts == NULL)
1559                       return FALSE;
1560                     elf_local_got_refcounts (abfd) = local_got_refcounts;
1561                     elf_i386_local_tlsdesc_gotent (abfd)
1562                       = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1563                     elf_i386_local_got_tls_type (abfd)
1564                       = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1565                   }
1566                 local_got_refcounts[r_symndx] += 1;
1567                 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1568               }
1569
1570             if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1571               tls_type |= old_tls_type;
1572             /* If a TLS symbol is accessed using IE at least once,
1573                there is no point to use dynamic model for it.  */
1574             else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1575                      && (! GOT_TLS_GD_ANY_P (old_tls_type)
1576                          || (tls_type & GOT_TLS_IE) == 0))
1577               {
1578                 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1579                   tls_type = old_tls_type;
1580                 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1581                          && GOT_TLS_GD_ANY_P (tls_type))
1582                   tls_type |= old_tls_type;
1583                 else
1584                   {
1585                     (*_bfd_error_handler)
1586                       (_("%B: `%s' accessed both as normal and "
1587                          "thread local symbol"),
1588                        abfd,
1589                        h ? h->root.root.string : "<local>");
1590                     return FALSE;
1591                   }
1592               }
1593
1594             if (old_tls_type != tls_type)
1595               {
1596                 if (h != NULL)
1597                   elf_i386_hash_entry (h)->tls_type = tls_type;
1598                 else
1599                   elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1600               }
1601           }
1602           /* Fall through */
1603
1604         case R_386_GOTOFF:
1605         case R_386_GOTPC:
1606         create_got:
1607           if (htab->elf.sgot == NULL)
1608             {
1609               if (htab->elf.dynobj == NULL)
1610                 htab->elf.dynobj = abfd;
1611               if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1612                 return FALSE;
1613             }
1614           if (r_type != R_386_TLS_IE)
1615             break;
1616           /* Fall through */
1617
1618         case R_386_TLS_LE_32:
1619         case R_386_TLS_LE:
1620           if (!info->shared)
1621             break;
1622           info->flags |= DF_STATIC_TLS;
1623           /* Fall through */
1624
1625         case R_386_32:
1626         case R_386_PC32:
1627           if (h != NULL && info->executable)
1628             {
1629               /* If this reloc is in a read-only section, we might
1630                  need a copy reloc.  We can't check reliably at this
1631                  stage whether the section is read-only, as input
1632                  sections have not yet been mapped to output sections.
1633                  Tentatively set the flag for now, and correct in
1634                  adjust_dynamic_symbol.  */
1635               h->non_got_ref = 1;
1636
1637               /* We may need a .plt entry if the function this reloc
1638                  refers to is in a shared lib.  */
1639               h->plt.refcount += 1;
1640               if (r_type != R_386_PC32)
1641                 h->pointer_equality_needed = 1;
1642             }
1643
1644           /* If we are creating a shared library, and this is a reloc
1645              against a global symbol, or a non PC relative reloc
1646              against a local symbol, then we need to copy the reloc
1647              into the shared library.  However, if we are linking with
1648              -Bsymbolic, we do not need to copy a reloc against a
1649              global symbol which is defined in an object we are
1650              including in the link (i.e., DEF_REGULAR is set).  At
1651              this point we have not seen all the input files, so it is
1652              possible that DEF_REGULAR is not set now but will be set
1653              later (it is never cleared).  In case of a weak definition,
1654              DEF_REGULAR may be cleared later by a strong definition in
1655              a shared library.  We account for that possibility below by
1656              storing information in the relocs_copied field of the hash
1657              table entry.  A similar situation occurs when creating
1658              shared libraries and symbol visibility changes render the
1659              symbol local.
1660
1661              If on the other hand, we are creating an executable, we
1662              may need to keep relocations for symbols satisfied by a
1663              dynamic library if we manage to avoid copy relocs for the
1664              symbol.  */
1665           if ((info->shared
1666                && (sec->flags & SEC_ALLOC) != 0
1667                && (r_type != R_386_PC32
1668                    || (h != NULL
1669                        && (! SYMBOLIC_BIND (info, h)
1670                            || h->root.type == bfd_link_hash_defweak
1671                            || !h->def_regular))))
1672               || (ELIMINATE_COPY_RELOCS
1673                   && !info->shared
1674                   && (sec->flags & SEC_ALLOC) != 0
1675                   && h != NULL
1676                   && (h->root.type == bfd_link_hash_defweak
1677                       || !h->def_regular)))
1678             {
1679               struct elf_i386_dyn_relocs *p;
1680               struct elf_i386_dyn_relocs **head;
1681
1682               /* We must copy these reloc types into the output file.
1683                  Create a reloc section in dynobj and make room for
1684                  this reloc.  */
1685               if (sreloc == NULL)
1686                 {
1687                   if (htab->elf.dynobj == NULL)
1688                     htab->elf.dynobj = abfd;
1689
1690                   sreloc = _bfd_elf_make_dynamic_reloc_section
1691                     (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1692
1693                   if (sreloc == NULL)
1694                     return FALSE;
1695                 }
1696
1697               /* If this is a global symbol, we count the number of
1698                  relocations we need for this symbol.  */
1699               if (h != NULL)
1700                 {
1701                   head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1702                 }
1703               else
1704                 {
1705                   void **vpp;
1706                   /* Track dynamic relocs needed for local syms too.
1707                      We really need local syms available to do this
1708                      easily.  Oh well.  */
1709
1710                   asection *s;
1711                   s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1712                                                  sec, r_symndx);
1713                   if (s == NULL)
1714                     return FALSE;
1715
1716                   vpp = &elf_section_data (s)->local_dynrel;
1717                   head = (struct elf_i386_dyn_relocs **)vpp;
1718                 }
1719
1720               p = *head;
1721               if (p == NULL || p->sec != sec)
1722                 {
1723                   bfd_size_type amt = sizeof *p;
1724                   p = bfd_alloc (htab->elf.dynobj, amt);
1725                   if (p == NULL)
1726                     return FALSE;
1727                   p->next = *head;
1728                   *head = p;
1729                   p->sec = sec;
1730                   p->count = 0;
1731                   p->pc_count = 0;
1732                 }
1733
1734               p->count += 1;
1735               if (r_type == R_386_PC32)
1736                 p->pc_count += 1;
1737             }
1738           break;
1739
1740           /* This relocation describes the C++ object vtable hierarchy.
1741              Reconstruct it for later use during GC.  */
1742         case R_386_GNU_VTINHERIT:
1743           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1744             return FALSE;
1745           break;
1746
1747           /* This relocation describes which C++ vtable entries are actually
1748              used.  Record for later use during GC.  */
1749         case R_386_GNU_VTENTRY:
1750           BFD_ASSERT (h != NULL);
1751           if (h != NULL
1752               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1753             return FALSE;
1754           break;
1755
1756         default:
1757           break;
1758         }
1759     }
1760
1761   return TRUE;
1762 }
1763
1764 /* Return the section that should be marked against GC for a given
1765    relocation.  */
1766
1767 static asection *
1768 elf_i386_gc_mark_hook (asection *sec,
1769                        struct bfd_link_info *info,
1770                        Elf_Internal_Rela *rel,
1771                        struct elf_link_hash_entry *h,
1772                        Elf_Internal_Sym *sym)
1773 {
1774   if (h != NULL)
1775     switch (ELF32_R_TYPE (rel->r_info))
1776       {
1777       case R_386_GNU_VTINHERIT:
1778       case R_386_GNU_VTENTRY:
1779         return NULL;
1780       }
1781
1782   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1783 }
1784
1785 /* Update the got entry reference counts for the section being removed.  */
1786
1787 static bfd_boolean
1788 elf_i386_gc_sweep_hook (bfd *abfd,
1789                         struct bfd_link_info *info,
1790                         asection *sec,
1791                         const Elf_Internal_Rela *relocs)
1792 {
1793   Elf_Internal_Shdr *symtab_hdr;
1794   struct elf_link_hash_entry **sym_hashes;
1795   bfd_signed_vma *local_got_refcounts;
1796   const Elf_Internal_Rela *rel, *relend;
1797
1798   if (info->relocatable)
1799     return TRUE;
1800
1801   elf_section_data (sec)->local_dynrel = NULL;
1802
1803   symtab_hdr = &elf_symtab_hdr (abfd);
1804   sym_hashes = elf_sym_hashes (abfd);
1805   local_got_refcounts = elf_local_got_refcounts (abfd);
1806
1807   relend = relocs + sec->reloc_count;
1808   for (rel = relocs; rel < relend; rel++)
1809     {
1810       unsigned long r_symndx;
1811       unsigned int r_type;
1812       struct elf_link_hash_entry *h = NULL;
1813
1814       r_symndx = ELF32_R_SYM (rel->r_info);
1815       if (r_symndx >= symtab_hdr->sh_info)
1816         {
1817           struct elf_i386_link_hash_entry *eh;
1818           struct elf_i386_dyn_relocs **pp;
1819           struct elf_i386_dyn_relocs *p;
1820
1821           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1822           while (h->root.type == bfd_link_hash_indirect
1823                  || h->root.type == bfd_link_hash_warning)
1824             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1825           eh = (struct elf_i386_link_hash_entry *) h;
1826
1827           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1828             if (p->sec == sec)
1829               {
1830                 /* Everything must go for SEC.  */
1831                 *pp = p->next;
1832                 break;
1833               }
1834         }
1835
1836       r_type = ELF32_R_TYPE (rel->r_info);
1837       if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1838                                      symtab_hdr, sym_hashes,
1839                                      &r_type, GOT_UNKNOWN,
1840                                      rel, relend, h))
1841         return FALSE;
1842
1843       switch (r_type)
1844         {
1845         case R_386_TLS_LDM:
1846           if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1847             elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1848           break;
1849
1850         case R_386_TLS_GD:
1851         case R_386_TLS_GOTDESC:
1852         case R_386_TLS_DESC_CALL:
1853         case R_386_TLS_IE_32:
1854         case R_386_TLS_IE:
1855         case R_386_TLS_GOTIE:
1856         case R_386_GOT32:
1857           if (h != NULL)
1858             {
1859               if (h->got.refcount > 0)
1860                 h->got.refcount -= 1;
1861             }
1862           else if (local_got_refcounts != NULL)
1863             {
1864               if (local_got_refcounts[r_symndx] > 0)
1865                 local_got_refcounts[r_symndx] -= 1;
1866             }
1867           break;
1868
1869         case R_386_32:
1870         case R_386_PC32:
1871           if (info->shared)
1872             break;
1873           /* Fall through */
1874
1875         case R_386_PLT32:
1876           if (h != NULL)
1877             {
1878               if (h->plt.refcount > 0)
1879                 h->plt.refcount -= 1;
1880             }
1881           break;
1882
1883         default:
1884           break;
1885         }
1886     }
1887
1888   return TRUE;
1889 }
1890
1891 /* Adjust a symbol defined by a dynamic object and referenced by a
1892    regular object.  The current definition is in some section of the
1893    dynamic object, but we're not including those sections.  We have to
1894    change the definition to something the rest of the link can
1895    understand.  */
1896
1897 static bfd_boolean
1898 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1899                                 struct elf_link_hash_entry *h)
1900 {
1901   struct elf_i386_link_hash_table *htab;
1902   asection *s;
1903
1904   /* STT_GNU_IFUNC symbol must go through PLT. */
1905   if (h->type == STT_GNU_IFUNC)
1906     {
1907       if (h->plt.refcount <= 0)
1908         {
1909           h->plt.offset = (bfd_vma) -1;
1910           h->needs_plt = 0;
1911         }
1912       return TRUE;
1913     }
1914
1915   /* If this is a function, put it in the procedure linkage table.  We
1916      will fill in the contents of the procedure linkage table later,
1917      when we know the address of the .got section.  */
1918   if (h->type == STT_FUNC
1919       || h->needs_plt)
1920     {
1921       if (h->plt.refcount <= 0
1922           || SYMBOL_CALLS_LOCAL (info, h)
1923           || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1924               && h->root.type == bfd_link_hash_undefweak))
1925         {
1926           /* This case can occur if we saw a PLT32 reloc in an input
1927              file, but the symbol was never referred to by a dynamic
1928              object, or if all references were garbage collected.  In
1929              such a case, we don't actually need to build a procedure
1930              linkage table, and we can just do a PC32 reloc instead.  */
1931           h->plt.offset = (bfd_vma) -1;
1932           h->needs_plt = 0;
1933         }
1934
1935       return TRUE;
1936     }
1937   else
1938     /* It's possible that we incorrectly decided a .plt reloc was
1939        needed for an R_386_PC32 reloc to a non-function sym in
1940        check_relocs.  We can't decide accurately between function and
1941        non-function syms in check-relocs;  Objects loaded later in
1942        the link may change h->type.  So fix it now.  */
1943     h->plt.offset = (bfd_vma) -1;
1944
1945   /* If this is a weak symbol, and there is a real definition, the
1946      processor independent code will have arranged for us to see the
1947      real definition first, and we can just use the same value.  */
1948   if (h->u.weakdef != NULL)
1949     {
1950       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1951                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
1952       h->root.u.def.section = h->u.weakdef->root.u.def.section;
1953       h->root.u.def.value = h->u.weakdef->root.u.def.value;
1954       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1955         h->non_got_ref = h->u.weakdef->non_got_ref;
1956       return TRUE;
1957     }
1958
1959   /* This is a reference to a symbol defined by a dynamic object which
1960      is not a function.  */
1961
1962   /* If we are creating a shared library, we must presume that the
1963      only references to the symbol are via the global offset table.
1964      For such cases we need not do anything here; the relocations will
1965      be handled correctly by relocate_section.  */
1966   if (info->shared)
1967     return TRUE;
1968
1969   /* If there are no references to this symbol that do not use the
1970      GOT, we don't need to generate a copy reloc.  */
1971   if (!h->non_got_ref)
1972     return TRUE;
1973
1974   /* If -z nocopyreloc was given, we won't generate them either.  */
1975   if (info->nocopyreloc)
1976     {
1977       h->non_got_ref = 0;
1978       return TRUE;
1979     }
1980
1981   htab = elf_i386_hash_table (info);
1982
1983   /* If there aren't any dynamic relocs in read-only sections, then
1984      we can keep the dynamic relocs and avoid the copy reloc.  This
1985      doesn't work on VxWorks, where we can not have dynamic relocations
1986      (other than copy and jump slot relocations) in an executable.  */
1987   if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
1988     {
1989       struct elf_i386_link_hash_entry * eh;
1990       struct elf_i386_dyn_relocs *p;
1991
1992       eh = (struct elf_i386_link_hash_entry *) h;
1993       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1994         {
1995           s = p->sec->output_section;
1996           if (s != NULL && (s->flags & SEC_READONLY) != 0)
1997             break;
1998         }
1999
2000       if (p == NULL)
2001         {
2002           h->non_got_ref = 0;
2003           return TRUE;
2004         }
2005     }
2006
2007   if (h->size == 0)
2008     {
2009       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2010                              h->root.root.string);
2011       return TRUE;
2012     }
2013
2014   /* We must allocate the symbol in our .dynbss section, which will
2015      become part of the .bss section of the executable.  There will be
2016      an entry for this symbol in the .dynsym section.  The dynamic
2017      object will contain position independent code, so all references
2018      from the dynamic object to this symbol will go through the global
2019      offset table.  The dynamic linker will use the .dynsym entry to
2020      determine the address it must put in the global offset table, so
2021      both the dynamic object and the regular object will refer to the
2022      same memory location for the variable.  */
2023
2024   /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2025      copy the initial value out of the dynamic object and into the
2026      runtime process image.  */
2027   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2028     {
2029       htab->srelbss->size += sizeof (Elf32_External_Rel);
2030       h->needs_copy = 1;
2031     }
2032
2033   s = htab->sdynbss;
2034
2035   return _bfd_elf_adjust_dynamic_copy (h, s);
2036 }
2037
2038 /* Allocate space in .plt, .got and associated reloc sections for
2039    dynamic relocs.  */
2040
2041 static bfd_boolean
2042 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2043 {
2044   struct bfd_link_info *info;
2045   struct elf_i386_link_hash_table *htab;
2046   struct elf_i386_link_hash_entry *eh;
2047   struct elf_i386_dyn_relocs *p;
2048
2049   if (h->root.type == bfd_link_hash_indirect)
2050     return TRUE;
2051
2052   if (h->root.type == bfd_link_hash_warning)
2053     /* When warning symbols are created, they **replace** the "real"
2054        entry in the hash table, thus we never get to see the real
2055        symbol in a hash traversal.  So look at it now.  */
2056     h = (struct elf_link_hash_entry *) h->root.u.i.link;
2057   eh = (struct elf_i386_link_hash_entry *) h;
2058
2059   info = (struct bfd_link_info *) inf;
2060   htab = elf_i386_hash_table (info);
2061
2062   /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2063      here if it is defined and referenced in a non-shared object.  */
2064   if (h->type == STT_GNU_IFUNC
2065       && h->def_regular)
2066     {
2067       asection *plt, *gotplt, *relplt;
2068
2069       /* When a shared library references a STT_GNU_IFUNC symbol
2070          defined in executable, the address of the resolved function
2071          may be used.  But in non-shared executable, the address of
2072          its .plt slot may be used.  Pointer equality may not work
2073          correctly.  PIE should be used if pointer equality is
2074          required here.  */
2075       if (!info->shared
2076           && (h->dynindx != -1
2077               || info->export_dynamic)
2078           && h->pointer_equality_needed)
2079         {
2080           info->callbacks->einfo
2081             (_("%F%P: dynamic STT_GNU_IFUNC symbol `%s' with pointer "
2082                "equality in `%B' can not be used when making an "
2083                "executable; recompile with -fPIE and relink with -pie\n"),
2084              h->root.root.string,
2085              h->root.u.def.section->owner);
2086           bfd_set_error (bfd_error_bad_value);
2087           return FALSE;
2088         }
2089
2090       /* Return and discard space for dynamic relocations against it if
2091          it is never referenced in a non-shared object.  */
2092       if (!h->ref_regular)
2093         {
2094           if (h->plt.refcount > 0
2095               || h->got.refcount > 0)
2096             abort ();
2097           h->got.offset = (bfd_vma) -1;
2098           eh->dyn_relocs = NULL;
2099           return TRUE;
2100         }
2101
2102       /* When building a static executable, use .iplt, .igot.plt and
2103          .rel.iplt sections for STT_GNU_IFUNC symbols.  */
2104       if (htab->elf.splt != NULL)
2105         {
2106           plt = htab->elf.splt;
2107           gotplt = htab->elf.sgotplt;
2108           relplt = htab->elf.srelplt;
2109
2110           /* If this is the first .plt entry, make room for the special
2111              first entry.  */
2112           if (plt->size == 0)
2113             plt->size += PLT_ENTRY_SIZE;
2114         }
2115       else
2116         {
2117           plt = htab->elf.iplt;
2118           gotplt = htab->elf.igotplt;
2119           relplt = htab->elf.irelplt;
2120         }
2121
2122       /* Don't update value of STT_GNU_IFUNC symbol to PLT.  We need
2123          the original value for R_386_IRELATIVE.  */
2124       h->plt.offset = plt->size;
2125
2126       /* Make room for this entry in the .plt/.iplt section.  */
2127       plt->size += PLT_ENTRY_SIZE;
2128
2129       /* We also need to make an entry in the .got.plt/.got.iplt
2130          section, which will be placed in the .got section by the
2131          linker script.  */
2132       gotplt->size += 4;
2133
2134       /* We also need to make an entry in the .rela.plt/.rela.iplt
2135          section.  */
2136       relplt->size += sizeof (Elf32_External_Rel);
2137       relplt->reloc_count++;
2138
2139       /* We need dynamic relocation for STT_GNU_IFUNC symbol only
2140          when there is a non-GOT reference in a shared object.  */
2141       if (!info->shared
2142           || !h->non_got_ref)
2143         eh->dyn_relocs = NULL;
2144
2145       /* Finally, allocate space.  */
2146       for (p = eh->dyn_relocs; p != NULL; p = p->next)
2147         htab->elf.irelifunc->size += p->count * sizeof (Elf32_External_Rel);
2148
2149       /* For STT_GNU_IFUNC symbol, .got.plt has the real function
2150          addres and .got has the PLT entry adddress.  We will load
2151          the GOT entry with the PLT entry in finish_dynamic_symbol if
2152          it is used.  For branch, it uses .got.plt.  For symbol value,
2153          1. Use .got.plt in a shared object if it is forced local or
2154          not dynamic.
2155          2. Use .got.plt in a non-shared object if pointer equality
2156          isn't needed.
2157          3. Use .got.plt in PIE.
2158          4. Use .got.plt if .got isn't used.
2159          5. Otherwise use .got so that it can be shared among different
2160          objects at run-time.
2161          We only need to relocate .got entry in shared object.  */
2162       if ((info->shared
2163            && (h->dynindx == -1
2164                || h->forced_local))
2165           || (!info->shared
2166               && !h->pointer_equality_needed)
2167           || (info->executable && info->shared)
2168           || htab->elf.sgot == NULL)
2169         {
2170           /* Use .got.plt.  */
2171           h->got.offset = (bfd_vma) -1;
2172         }
2173       else
2174         {
2175           h->got.offset = htab->elf.sgot->size;
2176           htab->elf.sgot->size += 4;
2177           if (info->shared)
2178             htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2179         }
2180
2181       return TRUE;
2182     }
2183   else if (htab->elf.dynamic_sections_created
2184            && h->plt.refcount > 0)
2185     {
2186       /* Make sure this symbol is output as a dynamic symbol.
2187          Undefined weak syms won't yet be marked as dynamic.  */
2188       if (h->dynindx == -1
2189           && !h->forced_local)
2190         {
2191           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2192             return FALSE;
2193         }
2194
2195       if (info->shared
2196           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2197         {
2198           asection *s = htab->elf.splt;
2199
2200           /* If this is the first .plt entry, make room for the special
2201              first entry.  */
2202           if (s->size == 0)
2203             s->size += PLT_ENTRY_SIZE;
2204
2205           h->plt.offset = s->size;
2206
2207           /* If this symbol is not defined in a regular file, and we are
2208              not generating a shared library, then set the symbol to this
2209              location in the .plt.  This is required to make function
2210              pointers compare as equal between the normal executable and
2211              the shared library.  */
2212           if (! info->shared
2213               && !h->def_regular)
2214             {
2215               h->root.u.def.section = s;
2216               h->root.u.def.value = h->plt.offset;
2217             }
2218
2219           /* Make room for this entry.  */
2220           s->size += PLT_ENTRY_SIZE;
2221
2222           /* We also need to make an entry in the .got.plt section, which
2223              will be placed in the .got section by the linker script.  */
2224           htab->elf.sgotplt->size += 4;
2225
2226           /* We also need to make an entry in the .rel.plt section.  */
2227           htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2228           htab->next_tls_desc_index++;
2229
2230           if (htab->is_vxworks && !info->shared)
2231             {
2232               /* VxWorks has a second set of relocations for each PLT entry
2233                  in executables.  They go in a separate relocation section,
2234                  which is processed by the kernel loader.  */
2235
2236               /* There are two relocations for the initial PLT entry: an
2237                  R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2238                  R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8.  */
2239
2240               if (h->plt.offset == PLT_ENTRY_SIZE)
2241                 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2242
2243               /* There are two extra relocations for each subsequent PLT entry:
2244                  an R_386_32 relocation for the GOT entry, and an R_386_32
2245                  relocation for the PLT entry.  */
2246
2247               htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2248             }
2249         }
2250       else
2251         {
2252           h->plt.offset = (bfd_vma) -1;
2253           h->needs_plt = 0;
2254         }
2255     }
2256   else
2257     {
2258       h->plt.offset = (bfd_vma) -1;
2259       h->needs_plt = 0;
2260     }
2261
2262   eh->tlsdesc_got = (bfd_vma) -1;
2263
2264   /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2265      make it a R_386_TLS_LE_32 requiring no TLS entry.  */
2266   if (h->got.refcount > 0
2267       && !info->shared
2268       && h->dynindx == -1
2269       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2270     h->got.offset = (bfd_vma) -1;
2271   else if (h->got.refcount > 0)
2272     {
2273       asection *s;
2274       bfd_boolean dyn;
2275       int tls_type = elf_i386_hash_entry(h)->tls_type;
2276
2277       /* Make sure this symbol is output as a dynamic symbol.
2278          Undefined weak syms won't yet be marked as dynamic.  */
2279       if (h->dynindx == -1
2280           && !h->forced_local)
2281         {
2282           if (! bfd_elf_link_record_dynamic_symbol (info, h))
2283             return FALSE;
2284         }
2285
2286       s = htab->elf.sgot;
2287       if (GOT_TLS_GDESC_P (tls_type))
2288         {
2289           eh->tlsdesc_got = htab->elf.sgotplt->size
2290             - elf_i386_compute_jump_table_size (htab);
2291           htab->elf.sgotplt->size += 8;
2292           h->got.offset = (bfd_vma) -2;
2293         }
2294       if (! GOT_TLS_GDESC_P (tls_type)
2295           || GOT_TLS_GD_P (tls_type))
2296         {
2297           h->got.offset = s->size;
2298           s->size += 4;
2299           /* R_386_TLS_GD needs 2 consecutive GOT slots.  */
2300           if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2301             s->size += 4;
2302         }
2303       dyn = htab->elf.dynamic_sections_created;
2304       /* R_386_TLS_IE_32 needs one dynamic relocation,
2305          R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2306          (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2307          need two), R_386_TLS_GD needs one if local symbol and two if
2308          global.  */
2309       if (tls_type == GOT_TLS_IE_BOTH)
2310         htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2311       else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2312                || (tls_type & GOT_TLS_IE))
2313         htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2314       else if (GOT_TLS_GD_P (tls_type))
2315         htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2316       else if (! GOT_TLS_GDESC_P (tls_type)
2317                && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2318                    || h->root.type != bfd_link_hash_undefweak)
2319                && (info->shared
2320                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2321         htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2322       if (GOT_TLS_GDESC_P (tls_type))
2323         htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2324     }
2325   else
2326     h->got.offset = (bfd_vma) -1;
2327
2328   if (eh->dyn_relocs == NULL)
2329     return TRUE;
2330
2331   /* In the shared -Bsymbolic case, discard space allocated for
2332      dynamic pc-relative relocs against symbols which turn out to be
2333      defined in regular objects.  For the normal shared case, discard
2334      space for pc-relative relocs that have become local due to symbol
2335      visibility changes.  */
2336
2337   if (info->shared)
2338     {
2339       /* The only reloc that uses pc_count is R_386_PC32, which will
2340          appear on a call or on something like ".long foo - .".  We
2341          want calls to protected symbols to resolve directly to the
2342          function rather than going via the plt.  If people want
2343          function pointer comparisons to work as expected then they
2344          should avoid writing assembly like ".long foo - .".  */
2345       if (SYMBOL_CALLS_LOCAL (info, h))
2346         {
2347           struct elf_i386_dyn_relocs **pp;
2348
2349           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2350             {
2351               p->count -= p->pc_count;
2352               p->pc_count = 0;
2353               if (p->count == 0)
2354                 *pp = p->next;
2355               else
2356                 pp = &p->next;
2357             }
2358         }
2359
2360       if (htab->is_vxworks)
2361         {
2362           struct elf_i386_dyn_relocs **pp;
2363           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2364             {
2365               if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2366                 *pp = p->next;
2367               else
2368                 pp = &p->next;
2369             }
2370         }
2371
2372       /* Also discard relocs on undefined weak syms with non-default
2373          visibility.  */
2374       if (eh->dyn_relocs != NULL
2375           && h->root.type == bfd_link_hash_undefweak)
2376         {
2377           if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2378             eh->dyn_relocs = NULL;
2379
2380           /* Make sure undefined weak symbols are output as a dynamic
2381              symbol in PIEs.  */
2382           else if (h->dynindx == -1
2383                    && !h->forced_local)
2384             {
2385               if (! bfd_elf_link_record_dynamic_symbol (info, h))
2386                 return FALSE;
2387             }
2388         }
2389     }
2390   else if (ELIMINATE_COPY_RELOCS)
2391     {
2392       /* For the non-shared case, discard space for relocs against
2393          symbols which turn out to need copy relocs or are not
2394          dynamic.  */
2395
2396       if (!h->non_got_ref
2397           && ((h->def_dynamic
2398                && !h->def_regular)
2399               || (htab->elf.dynamic_sections_created
2400                   && (h->root.type == bfd_link_hash_undefweak
2401                       || h->root.type == bfd_link_hash_undefined))))
2402         {
2403           /* Make sure this symbol is output as a dynamic symbol.
2404              Undefined weak syms won't yet be marked as dynamic.  */
2405           if (h->dynindx == -1
2406               && !h->forced_local)
2407             {
2408               if (! bfd_elf_link_record_dynamic_symbol (info, h))
2409                 return FALSE;
2410             }
2411
2412           /* If that succeeded, we know we'll be keeping all the
2413              relocs.  */
2414           if (h->dynindx != -1)
2415             goto keep;
2416         }
2417
2418       eh->dyn_relocs = NULL;
2419
2420     keep: ;
2421     }
2422
2423   /* Finally, allocate space.  */
2424   for (p = eh->dyn_relocs; p != NULL; p = p->next)
2425     {
2426       asection *sreloc;
2427
2428       sreloc = elf_section_data (p->sec)->sreloc;
2429
2430       BFD_ASSERT (sreloc != NULL);
2431       sreloc->size += p->count * sizeof (Elf32_External_Rel);
2432     }
2433
2434   return TRUE;
2435 }
2436
2437 /* Allocate space in .plt, .got and associated reloc sections for
2438    local dynamic relocs.  */
2439
2440 static bfd_boolean
2441 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2442 {
2443   struct elf_link_hash_entry *h
2444     = (struct elf_link_hash_entry *) *slot;
2445
2446   if (h->type != STT_GNU_IFUNC
2447       || !h->def_regular
2448       || !h->ref_regular
2449       || !h->forced_local
2450       || h->root.type != bfd_link_hash_defined)
2451     abort ();
2452
2453   return elf_i386_allocate_dynrelocs (h, inf);
2454 }
2455
2456 /* Find any dynamic relocs that apply to read-only sections.  */
2457
2458 static bfd_boolean
2459 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2460 {
2461   struct elf_i386_link_hash_entry *eh;
2462   struct elf_i386_dyn_relocs *p;
2463
2464   if (h->root.type == bfd_link_hash_warning)
2465     h = (struct elf_link_hash_entry *) h->root.u.i.link;
2466
2467   eh = (struct elf_i386_link_hash_entry *) h;
2468   for (p = eh->dyn_relocs; p != NULL; p = p->next)
2469     {
2470       asection *s = p->sec->output_section;
2471
2472       if (s != NULL && (s->flags & SEC_READONLY) != 0)
2473         {
2474           struct bfd_link_info *info = (struct bfd_link_info *) inf;
2475
2476           info->flags |= DF_TEXTREL;
2477
2478           /* Not an error, just cut short the traversal.  */
2479           return FALSE;
2480         }
2481     }
2482   return TRUE;
2483 }
2484
2485 /* Set the sizes of the dynamic sections.  */
2486
2487 static bfd_boolean
2488 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2489                                 struct bfd_link_info *info)
2490 {
2491   struct elf_i386_link_hash_table *htab;
2492   bfd *dynobj;
2493   asection *s;
2494   bfd_boolean relocs;
2495   bfd *ibfd;
2496
2497   htab = elf_i386_hash_table (info);
2498   dynobj = htab->elf.dynobj;
2499   if (dynobj == NULL)
2500     abort ();
2501
2502   if (htab->elf.dynamic_sections_created)
2503     {
2504       /* Set the contents of the .interp section to the interpreter.  */
2505       if (info->executable)
2506         {
2507           s = bfd_get_section_by_name (dynobj, ".interp");
2508           if (s == NULL)
2509             abort ();
2510           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2511           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2512         }
2513     }
2514
2515   /* Set up .got offsets for local syms, and space for local dynamic
2516      relocs.  */
2517   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2518     {
2519       bfd_signed_vma *local_got;
2520       bfd_signed_vma *end_local_got;
2521       char *local_tls_type;
2522       bfd_vma *local_tlsdesc_gotent;
2523       bfd_size_type locsymcount;
2524       Elf_Internal_Shdr *symtab_hdr;
2525       asection *srel;
2526
2527       if (! is_i386_elf (ibfd))
2528         continue;
2529
2530       for (s = ibfd->sections; s != NULL; s = s->next)
2531         {
2532           struct elf_i386_dyn_relocs *p;
2533
2534           for (p = ((struct elf_i386_dyn_relocs *)
2535                      elf_section_data (s)->local_dynrel);
2536                p != NULL;
2537                p = p->next)
2538             {
2539               if (!bfd_is_abs_section (p->sec)
2540                   && bfd_is_abs_section (p->sec->output_section))
2541                 {
2542                   /* Input section has been discarded, either because
2543                      it is a copy of a linkonce section or due to
2544                      linker script /DISCARD/, so we'll be discarding
2545                      the relocs too.  */
2546                 }
2547               else if (htab->is_vxworks
2548                        && strcmp (p->sec->output_section->name,
2549                                   ".tls_vars") == 0)
2550                 {
2551                   /* Relocations in vxworks .tls_vars sections are
2552                      handled specially by the loader.  */
2553                 }
2554               else if (p->count != 0)
2555                 {
2556                   srel = elf_section_data (p->sec)->sreloc;
2557                   srel->size += p->count * sizeof (Elf32_External_Rel);
2558                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2559                     info->flags |= DF_TEXTREL;
2560                 }
2561             }
2562         }
2563
2564       local_got = elf_local_got_refcounts (ibfd);
2565       if (!local_got)
2566         continue;
2567
2568       symtab_hdr = &elf_symtab_hdr (ibfd);
2569       locsymcount = symtab_hdr->sh_info;
2570       end_local_got = local_got + locsymcount;
2571       local_tls_type = elf_i386_local_got_tls_type (ibfd);
2572       local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2573       s = htab->elf.sgot;
2574       srel = htab->elf.srelgot;
2575       for (; local_got < end_local_got;
2576            ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2577         {
2578           *local_tlsdesc_gotent = (bfd_vma) -1;
2579           if (*local_got > 0)
2580             {
2581               if (GOT_TLS_GDESC_P (*local_tls_type))
2582                 {
2583                   *local_tlsdesc_gotent = htab->elf.sgotplt->size
2584                     - elf_i386_compute_jump_table_size (htab);
2585                   htab->elf.sgotplt->size += 8;
2586                   *local_got = (bfd_vma) -2;
2587                 }
2588               if (! GOT_TLS_GDESC_P (*local_tls_type)
2589                   || GOT_TLS_GD_P (*local_tls_type))
2590                 {
2591                   *local_got = s->size;
2592                   s->size += 4;
2593                   if (GOT_TLS_GD_P (*local_tls_type)
2594                       || *local_tls_type == GOT_TLS_IE_BOTH)
2595                     s->size += 4;
2596                 }
2597               if (info->shared
2598                   || GOT_TLS_GD_ANY_P (*local_tls_type)
2599                   || (*local_tls_type & GOT_TLS_IE))
2600                 {
2601                   if (*local_tls_type == GOT_TLS_IE_BOTH)
2602                     srel->size += 2 * sizeof (Elf32_External_Rel);
2603                   else if (GOT_TLS_GD_P (*local_tls_type)
2604                            || ! GOT_TLS_GDESC_P (*local_tls_type))
2605                     srel->size += sizeof (Elf32_External_Rel);
2606                   if (GOT_TLS_GDESC_P (*local_tls_type))
2607                     htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2608                 }
2609             }
2610           else
2611             *local_got = (bfd_vma) -1;
2612         }
2613     }
2614
2615   if (htab->tls_ldm_got.refcount > 0)
2616     {
2617       /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2618          relocs.  */
2619       htab->tls_ldm_got.offset = htab->elf.sgot->size;
2620       htab->elf.sgot->size += 8;
2621       htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2622     }
2623   else
2624     htab->tls_ldm_got.offset = -1;
2625
2626   /* Allocate global sym .plt and .got entries, and space for global
2627      sym dynamic relocs.  */
2628   elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2629
2630   /* Allocate .plt and .got entries, and space for local symbols.  */
2631   htab_traverse (htab->loc_hash_table,
2632                  elf_i386_allocate_local_dynrelocs,
2633                  info);
2634
2635   /* For every jump slot reserved in the sgotplt, reloc_count is
2636      incremented.  However, when we reserve space for TLS descriptors,
2637      it's not incremented, so in order to compute the space reserved
2638      for them, it suffices to multiply the reloc count by the jump
2639      slot size.  */
2640   if (htab->elf.srelplt)
2641     htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2642
2643   /* We now have determined the sizes of the various dynamic sections.
2644      Allocate memory for them.  */
2645   relocs = FALSE;
2646   for (s = dynobj->sections; s != NULL; s = s->next)
2647     {
2648       bfd_boolean strip_section = TRUE;
2649
2650       if ((s->flags & SEC_LINKER_CREATED) == 0)
2651         continue;
2652
2653       if (s == htab->elf.splt
2654           || s == htab->elf.sgot
2655           || s == htab->elf.sgotplt
2656           || s == htab->elf.iplt
2657           || s == htab->elf.igotplt
2658           || s == htab->sdynbss)
2659         {
2660           /* Strip this section if we don't need it; see the
2661              comment below.  */
2662           /* We'd like to strip these sections if they aren't needed, but if
2663              we've exported dynamic symbols from them we must leave them.
2664              It's too late to tell BFD to get rid of the symbols.  */
2665
2666           if (htab->elf.hplt != NULL)
2667             strip_section = FALSE;
2668         }
2669       else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2670         {
2671           if (s->size != 0
2672               && s != htab->elf.srelplt
2673               && s != htab->srelplt2)
2674             relocs = TRUE;
2675
2676           /* We use the reloc_count field as a counter if we need
2677              to copy relocs into the output file.  */
2678           s->reloc_count = 0;
2679         }
2680       else
2681         {
2682           /* It's not one of our sections, so don't allocate space.  */
2683           continue;
2684         }
2685
2686       if (s->size == 0)
2687         {
2688           /* If we don't need this section, strip it from the
2689              output file.  This is mostly to handle .rel.bss and
2690              .rel.plt.  We must create both sections in
2691              create_dynamic_sections, because they must be created
2692              before the linker maps input sections to output
2693              sections.  The linker does that before
2694              adjust_dynamic_symbol is called, and it is that
2695              function which decides whether anything needs to go
2696              into these sections.  */
2697           if (strip_section)
2698             s->flags |= SEC_EXCLUDE;
2699           continue;
2700         }
2701
2702       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2703         continue;
2704
2705       /* Allocate memory for the section contents.  We use bfd_zalloc
2706          here in case unused entries are not reclaimed before the
2707          section's contents are written out.  This should not happen,
2708          but this way if it does, we get a R_386_NONE reloc instead
2709          of garbage.  */
2710       s->contents = bfd_zalloc (dynobj, s->size);
2711       if (s->contents == NULL)
2712         return FALSE;
2713     }
2714
2715   if (htab->elf.dynamic_sections_created)
2716     {
2717       /* Add some entries to the .dynamic section.  We fill in the
2718          values later, in elf_i386_finish_dynamic_sections, but we
2719          must add the entries now so that we get the correct size for
2720          the .dynamic section.  The DT_DEBUG entry is filled in by the
2721          dynamic linker and used by the debugger.  */
2722 #define add_dynamic_entry(TAG, VAL) \
2723   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2724
2725       if (info->executable)
2726         {
2727           if (!add_dynamic_entry (DT_DEBUG, 0))
2728             return FALSE;
2729         }
2730
2731       if (htab->elf.splt->size != 0)
2732         {
2733           if (!add_dynamic_entry (DT_PLTGOT, 0)
2734               || !add_dynamic_entry (DT_PLTRELSZ, 0)
2735               || !add_dynamic_entry (DT_PLTREL, DT_REL)
2736               || !add_dynamic_entry (DT_JMPREL, 0))
2737             return FALSE;
2738         }
2739
2740       if (relocs)
2741         {
2742           if (!add_dynamic_entry (DT_REL, 0)
2743               || !add_dynamic_entry (DT_RELSZ, 0)
2744               || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2745             return FALSE;
2746
2747           /* If any dynamic relocs apply to a read-only section,
2748              then we need a DT_TEXTREL entry.  */
2749           if ((info->flags & DF_TEXTREL) == 0)
2750             elf_link_hash_traverse (&htab->elf,
2751                                     elf_i386_readonly_dynrelocs, info);
2752
2753           if ((info->flags & DF_TEXTREL) != 0)
2754             {
2755               if (!add_dynamic_entry (DT_TEXTREL, 0))
2756                 return FALSE;
2757             }
2758         }
2759       if (htab->is_vxworks
2760           && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2761         return FALSE;
2762     }
2763 #undef add_dynamic_entry
2764
2765   return TRUE;
2766 }
2767
2768 static bfd_boolean
2769 elf_i386_always_size_sections (bfd *output_bfd,
2770                                struct bfd_link_info *info)
2771 {
2772   asection *tls_sec = elf_hash_table (info)->tls_sec;
2773
2774   if (tls_sec)
2775     {
2776       struct elf_link_hash_entry *tlsbase;
2777
2778       tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2779                                       "_TLS_MODULE_BASE_",
2780                                       FALSE, FALSE, FALSE);
2781
2782       if (tlsbase && tlsbase->type == STT_TLS)
2783         {
2784           struct bfd_link_hash_entry *bh = NULL;
2785           const struct elf_backend_data *bed
2786             = get_elf_backend_data (output_bfd);
2787
2788           if (!(_bfd_generic_link_add_one_symbol
2789                 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2790                  tls_sec, 0, NULL, FALSE,
2791                  bed->collect, &bh)))
2792             return FALSE;
2793
2794           elf_i386_hash_table (info)->tls_module_base = bh;
2795
2796           tlsbase = (struct elf_link_hash_entry *)bh;
2797           tlsbase->def_regular = 1;
2798           tlsbase->other = STV_HIDDEN;
2799           (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2800         }
2801     }
2802
2803   return TRUE;
2804 }
2805
2806 /* Set the correct type for an x86 ELF section.  We do this by the
2807    section name, which is a hack, but ought to work.  */
2808
2809 static bfd_boolean
2810 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2811                         Elf_Internal_Shdr *hdr,
2812                         asection *sec)
2813 {
2814   register const char *name;
2815
2816   name = bfd_get_section_name (abfd, sec);
2817
2818   /* This is an ugly, but unfortunately necessary hack that is
2819      needed when producing EFI binaries on x86. It tells
2820      elf.c:elf_fake_sections() not to consider ".reloc" as a section
2821      containing ELF relocation info.  We need this hack in order to
2822      be able to generate ELF binaries that can be translated into
2823      EFI applications (which are essentially COFF objects).  Those
2824      files contain a COFF ".reloc" section inside an ELFNN object,
2825      which would normally cause BFD to segfault because it would
2826      attempt to interpret this section as containing relocation
2827      entries for section "oc".  With this hack enabled, ".reloc"
2828      will be treated as a normal data section, which will avoid the
2829      segfault.  However, you won't be able to create an ELFNN binary
2830      with a section named "oc" that needs relocations, but that's
2831      the kind of ugly side-effects you get when detecting section
2832      types based on their names...  In practice, this limitation is
2833      unlikely to bite.  */
2834   if (strcmp (name, ".reloc") == 0)
2835     hdr->sh_type = SHT_PROGBITS;
2836
2837   return TRUE;
2838 }
2839
2840 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2841    executables.  Rather than setting it to the beginning of the TLS
2842    section, we have to set it to the end.    This function may be called
2843    multiple times, it is idempotent.  */
2844
2845 static void
2846 elf_i386_set_tls_module_base (struct bfd_link_info *info)
2847 {
2848   struct bfd_link_hash_entry *base;
2849
2850   if (!info->executable)
2851     return;
2852
2853   base = elf_i386_hash_table (info)->tls_module_base;
2854
2855   if (!base)
2856     return;
2857
2858   base->u.def.value = elf_hash_table (info)->tls_size;
2859 }
2860
2861 /* Return the base VMA address which should be subtracted from real addresses
2862    when resolving @dtpoff relocation.
2863    This is PT_TLS segment p_vaddr.  */
2864
2865 static bfd_vma
2866 elf_i386_dtpoff_base (struct bfd_link_info *info)
2867 {
2868   /* If tls_sec is NULL, we should have signalled an error already.  */
2869   if (elf_hash_table (info)->tls_sec == NULL)
2870     return 0;
2871   return elf_hash_table (info)->tls_sec->vma;
2872 }
2873
2874 /* Return the relocation value for @tpoff relocation
2875    if STT_TLS virtual address is ADDRESS.  */
2876
2877 static bfd_vma
2878 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2879 {
2880   struct elf_link_hash_table *htab = elf_hash_table (info);
2881
2882   /* If tls_sec is NULL, we should have signalled an error already.  */
2883   if (htab->tls_sec == NULL)
2884     return 0;
2885   return htab->tls_size + htab->tls_sec->vma - address;
2886 }
2887
2888 /* Relocate an i386 ELF section.  */
2889
2890 static bfd_boolean
2891 elf_i386_relocate_section (bfd *output_bfd,
2892                            struct bfd_link_info *info,
2893                            bfd *input_bfd,
2894                            asection *input_section,
2895                            bfd_byte *contents,
2896                            Elf_Internal_Rela *relocs,
2897                            Elf_Internal_Sym *local_syms,
2898                            asection **local_sections)
2899 {
2900   struct elf_i386_link_hash_table *htab;
2901   Elf_Internal_Shdr *symtab_hdr;
2902   struct elf_link_hash_entry **sym_hashes;
2903   bfd_vma *local_got_offsets;
2904   bfd_vma *local_tlsdesc_gotents;
2905   Elf_Internal_Rela *rel;
2906   Elf_Internal_Rela *relend;
2907   bfd_boolean is_vxworks_tls;
2908
2909   BFD_ASSERT (is_i386_elf (input_bfd));
2910
2911   htab = elf_i386_hash_table (info);
2912   symtab_hdr = &elf_symtab_hdr (input_bfd);
2913   sym_hashes = elf_sym_hashes (input_bfd);
2914   local_got_offsets = elf_local_got_offsets (input_bfd);
2915   local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2916   /* We have to handle relocations in vxworks .tls_vars sections
2917      specially, because the dynamic loader is 'weird'.  */
2918   is_vxworks_tls = (htab->is_vxworks && info->shared
2919                     && !strcmp (input_section->output_section->name,
2920                                 ".tls_vars"));
2921
2922   elf_i386_set_tls_module_base (info);
2923
2924   rel = relocs;
2925   relend = relocs + input_section->reloc_count;
2926   for (; rel < relend; rel++)
2927     {
2928       unsigned int r_type;
2929       reloc_howto_type *howto;
2930       unsigned long r_symndx;
2931       struct elf_link_hash_entry *h;
2932       Elf_Internal_Sym *sym;
2933       asection *sec;
2934       bfd_vma off, offplt;
2935       bfd_vma relocation;
2936       bfd_boolean unresolved_reloc;
2937       bfd_reloc_status_type r;
2938       unsigned int indx;
2939       int tls_type;
2940
2941       r_type = ELF32_R_TYPE (rel->r_info);
2942       if (r_type == R_386_GNU_VTINHERIT
2943           || r_type == R_386_GNU_VTENTRY)
2944         continue;
2945
2946       if ((indx = r_type) >= R_386_standard
2947           && ((indx = r_type - R_386_ext_offset) - R_386_standard
2948               >= R_386_ext - R_386_standard)
2949           && ((indx = r_type - R_386_tls_offset) - R_386_ext
2950               >= R_386_irelative - R_386_ext))
2951         {
2952           (*_bfd_error_handler)
2953             (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2954              input_bfd, input_section, r_type);
2955           bfd_set_error (bfd_error_bad_value);
2956           return FALSE;
2957         }
2958       howto = elf_howto_table + indx;
2959
2960       r_symndx = ELF32_R_SYM (rel->r_info);
2961       h = NULL;
2962       sym = NULL;
2963       sec = NULL;
2964       unresolved_reloc = FALSE;
2965       if (r_symndx < symtab_hdr->sh_info)
2966         {
2967           sym = local_syms + r_symndx;
2968           sec = local_sections[r_symndx];
2969           relocation = (sec->output_section->vma
2970                         + sec->output_offset
2971                         + sym->st_value);
2972
2973           if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2974               && ((sec->flags & SEC_MERGE) != 0
2975                   || (info->relocatable
2976                       && sec->output_offset != 0)))
2977             {
2978               bfd_vma addend;
2979               bfd_byte *where = contents + rel->r_offset;
2980
2981               switch (howto->size)
2982                 {
2983                 case 0:
2984                   addend = bfd_get_8 (input_bfd, where);
2985                   if (howto->pc_relative)
2986                     {
2987                       addend = (addend ^ 0x80) - 0x80;
2988                       addend += 1;
2989                     }
2990                   break;
2991                 case 1:
2992                   addend = bfd_get_16 (input_bfd, where);
2993                   if (howto->pc_relative)
2994                     {
2995                       addend = (addend ^ 0x8000) - 0x8000;
2996                       addend += 2;
2997                     }
2998                   break;
2999                 case 2:
3000                   addend = bfd_get_32 (input_bfd, where);
3001                   if (howto->pc_relative)
3002                     {
3003                       addend = (addend ^ 0x80000000) - 0x80000000;
3004                       addend += 4;
3005                     }
3006                   break;
3007                 default:
3008                   abort ();
3009                 }
3010
3011               if (info->relocatable)
3012                 addend += sec->output_offset;
3013               else
3014                 {
3015                   asection *msec = sec;
3016                   addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3017                                                    addend);
3018                   addend -= relocation;
3019                   addend += msec->output_section->vma + msec->output_offset;
3020                 }
3021
3022               switch (howto->size)
3023                 {
3024                 case 0:
3025                   /* FIXME: overflow checks.  */
3026                   if (howto->pc_relative)
3027                     addend -= 1;
3028                   bfd_put_8 (input_bfd, addend, where);
3029                   break;
3030                 case 1:
3031                   if (howto->pc_relative)
3032                     addend -= 2;
3033                   bfd_put_16 (input_bfd, addend, where);
3034                   break;
3035                 case 2:
3036                   if (howto->pc_relative)
3037                     addend -= 4;
3038                   bfd_put_32 (input_bfd, addend, where);
3039                   break;
3040                 }
3041             }
3042           else if (ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3043             {
3044               /* Relocate against local STT_GNU_IFUNC symbol.  */
3045               h = elf_i386_get_local_sym_hash (htab, input_bfd,
3046                                                    rel, FALSE);
3047               if (h == NULL)
3048                 abort ();
3049
3050               /* Set STT_GNU_IFUNC symbol value.  */
3051               h->root.u.def.value = sym->st_value;
3052               h->root.u.def.section = sec;
3053             }
3054         }
3055       else
3056         {
3057           bfd_boolean warned;
3058
3059           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3060                                    r_symndx, symtab_hdr, sym_hashes,
3061                                    h, sec, relocation,
3062                                    unresolved_reloc, warned);
3063         }
3064
3065       if (sec != NULL && elf_discarded_section (sec))
3066         {
3067           /* For relocs against symbols from removed linkonce sections,
3068              or sections discarded by a linker script, we just want the
3069              section contents zeroed.  Avoid any special processing.  */
3070           _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
3071           rel->r_info = 0;
3072           rel->r_addend = 0;
3073           continue;
3074         }
3075
3076       if (info->relocatable)
3077         continue;
3078
3079       /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3080          it here if it is defined in a non-shared object.  */
3081       if (h != NULL
3082           && h->type == STT_GNU_IFUNC
3083           && h->def_regular)
3084         {
3085           asection *plt, *gotplt, *base_got;
3086           bfd_vma plt_index;
3087
3088           if ((input_section->flags & SEC_ALLOC) == 0
3089               || h->plt.offset == (bfd_vma) -1)
3090             abort ();
3091
3092           /* STT_GNU_IFUNC symbol must go through PLT.  */
3093           if (htab->elf.splt != NULL)
3094             {
3095               plt = htab->elf.splt;
3096               gotplt = htab->elf.sgotplt;
3097             }
3098           else
3099             {
3100               plt = htab->elf.iplt;
3101               gotplt = htab->elf.igotplt;
3102             }
3103
3104           relocation = (plt->output_section->vma
3105                         + plt->output_offset + h->plt.offset);
3106
3107           switch (r_type)
3108             {
3109             default:
3110               (*_bfd_error_handler)
3111                 (_("%B: relocation %s against STT_GNU_IFUNC "
3112                    "symbol `%s' isn't handled by %s"), input_bfd,
3113                  elf_howto_table[r_type].name,
3114                  (h->root.root.string
3115                   ? h->root.root.string : "a local symbol"),
3116                  __FUNCTION__);
3117               bfd_set_error (bfd_error_bad_value);
3118               return FALSE;
3119
3120             case R_386_32:
3121               /* Generate dynamic relcoation only when there is a
3122                  non-GOF reference in a shared object.  */
3123               if (info->shared && h->non_got_ref)
3124                 {
3125                   Elf_Internal_Rela outrel;
3126                   bfd_byte *loc;
3127                   asection *sreloc;
3128                   bfd_vma offset;
3129
3130                   /* Need a dynamic relocation to get the real function
3131                      adddress.  */
3132                   offset = _bfd_elf_section_offset (output_bfd,
3133                                                     info,
3134                                                     input_section,
3135                                                     rel->r_offset);
3136                   if (offset == (bfd_vma) -1
3137                       || offset == (bfd_vma) -2)
3138                     abort ();
3139
3140                   outrel.r_offset = (input_section->output_section->vma
3141                                      + input_section->output_offset
3142                                      + offset);
3143
3144                   if (h->dynindx == -1
3145                       || h->forced_local
3146                       || info->executable)
3147                     {
3148                       /* This symbol is resolved locally.  */
3149                       outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3150                       bfd_put_32 (output_bfd,
3151                                   (h->root.u.def.value
3152                                    + h->root.u.def.section->output_section->vma
3153                                    + h->root.u.def.section->output_offset),
3154                                   contents + offset);
3155                     }
3156                   else
3157                     outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3158
3159                   sreloc = htab->elf.irelifunc;
3160                   loc = sreloc->contents;
3161                   loc += (sreloc->reloc_count++
3162                           * sizeof (Elf32_External_Rel));
3163                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3164
3165                   /* If this reloc is against an external symbol, we
3166                      do not want to fiddle with the addend.  Otherwise,
3167                      we need to include the symbol value so that it
3168                      becomes an addend for the dynamic reloc.  For an
3169                      internal symbol, we have updated addend.  */
3170                   continue;
3171                 }
3172
3173             case R_386_PC32:
3174             case R_386_PLT32:
3175               goto do_relocation;
3176
3177             case R_386_GOT32:
3178               base_got = htab->elf.sgot;
3179               off = h->got.offset;
3180
3181               if (base_got == NULL)
3182                 abort ();
3183
3184               if (off == (bfd_vma) -1)
3185                 {
3186                   /* We can't use h->got.offset here to save state, or
3187                      even just remember the offset, as finish_dynamic_symbol
3188                      would use that as offset into .got.  */
3189
3190                   if (htab->elf.splt != NULL)
3191                     {
3192                       plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3193                       off = (plt_index + 3) * 4;
3194                       base_got = htab->elf.sgotplt;
3195                     }
3196                   else
3197                     {
3198                       plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3199                       off = plt_index * 4;
3200                       base_got = htab->elf.igotplt;
3201                     }
3202
3203                   if (h->dynindx == -1
3204                       || h->forced_local
3205                       || info->symbolic)
3206                     {
3207                       /* This references the local defitionion.  We must
3208                          initialize this entry in the global offset table.
3209                          Since the offset must always be a multiple of 8,
3210                          we use the least significant bit to record
3211                          whether we have initialized it already.
3212
3213                          When doing a dynamic link, we create a .rela.got
3214                          relocation entry to initialize the value.  This
3215                          is done in the finish_dynamic_symbol routine.   */
3216                       if ((off & 1) != 0)
3217                         off &= ~1;
3218                       else
3219                         {
3220                           bfd_put_32 (output_bfd, relocation,
3221                                       base_got->contents + off);
3222                           h->got.offset |= 1;
3223                         }
3224                     }
3225
3226                   relocation = off;
3227
3228                   /* Adjust for static executables.  */
3229                   if (htab->elf.splt == NULL)
3230                     relocation += gotplt->output_offset;
3231                 }
3232               else
3233                 {
3234                   relocation = (base_got->output_section->vma
3235                                 + base_got->output_offset + off
3236                                 - gotplt->output_section->vma
3237                                 - gotplt->output_offset);
3238                   /* Adjust for static executables.  */
3239                   if (htab->elf.splt == NULL)
3240                     relocation += gotplt->output_offset;
3241                 }
3242
3243               goto do_relocation;
3244
3245             case R_386_GOTOFF:
3246               relocation -= (gotplt->output_section->vma
3247                              + gotplt->output_offset);
3248               goto do_relocation;
3249             }
3250         }
3251
3252       switch (r_type)
3253         {
3254         case R_386_GOT32:
3255           /* Relocation is to the entry for this symbol in the global
3256              offset table.  */
3257           if (htab->elf.sgot == NULL)
3258             abort ();
3259
3260           if (h != NULL)
3261             {
3262               bfd_boolean dyn;
3263
3264               off = h->got.offset;
3265               dyn = htab->elf.dynamic_sections_created;
3266               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3267                   || (info->shared
3268                       && SYMBOL_REFERENCES_LOCAL (info, h))
3269                   || (ELF_ST_VISIBILITY (h->other)
3270                       && h->root.type == bfd_link_hash_undefweak))
3271                 {
3272                   /* This is actually a static link, or it is a
3273                      -Bsymbolic link and the symbol is defined
3274                      locally, or the symbol was forced to be local
3275                      because of a version file.  We must initialize
3276                      this entry in the global offset table.  Since the
3277                      offset must always be a multiple of 4, we use the
3278                      least significant bit to record whether we have
3279                      initialized it already.
3280
3281                      When doing a dynamic link, we create a .rel.got
3282                      relocation entry to initialize the value.  This
3283                      is done in the finish_dynamic_symbol routine.  */
3284                   if ((off & 1) != 0)
3285                     off &= ~1;
3286                   else
3287                     {
3288                       bfd_put_32 (output_bfd, relocation,
3289                                   htab->elf.sgot->contents + off);
3290                       h->got.offset |= 1;
3291                     }
3292                 }
3293               else
3294                 unresolved_reloc = FALSE;
3295             }
3296           else
3297             {
3298               if (local_got_offsets == NULL)
3299                 abort ();
3300
3301               off = local_got_offsets[r_symndx];
3302
3303               /* The offset must always be a multiple of 4.  We use
3304                  the least significant bit to record whether we have
3305                  already generated the necessary reloc.  */
3306               if ((off & 1) != 0)
3307                 off &= ~1;
3308               else
3309                 {
3310                   bfd_put_32 (output_bfd, relocation,
3311                               htab->elf.sgot->contents + off);
3312
3313                   if (info->shared)
3314                     {
3315                       asection *s;
3316                       Elf_Internal_Rela outrel;
3317                       bfd_byte *loc;
3318
3319                       s = htab->elf.srelgot;
3320                       if (s == NULL)
3321                         abort ();
3322
3323                       outrel.r_offset = (htab->elf.sgot->output_section->vma
3324                                          + htab->elf.sgot->output_offset
3325                                          + off);
3326                       outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3327                       loc = s->contents;
3328                       loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
3329                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3330                     }
3331
3332                   local_got_offsets[r_symndx] |= 1;
3333                 }
3334             }
3335
3336           if (off >= (bfd_vma) -2)
3337             abort ();
3338
3339           relocation = htab->elf.sgot->output_section->vma
3340                        + htab->elf.sgot->output_offset + off
3341                        - htab->elf.sgotplt->output_section->vma
3342                        - htab->elf.sgotplt->output_offset;
3343           break;
3344
3345         case R_386_GOTOFF:
3346           /* Relocation is relative to the start of the global offset
3347              table.  */
3348
3349           /* Check to make sure it isn't a protected function symbol
3350              for shared library since it may not be local when used
3351              as function address.  We also need to make sure that a
3352              symbol is defined locally.  */
3353           if (info->shared && h)
3354             {
3355               if (!h->def_regular)
3356                 {
3357                   const char *v;
3358
3359                   switch (ELF_ST_VISIBILITY (h->other))
3360                     {
3361                     case STV_HIDDEN:
3362                       v = _("hidden symbol");
3363                       break;
3364                     case STV_INTERNAL:
3365                       v = _("internal symbol");
3366                       break;
3367                     case STV_PROTECTED:
3368                       v = _("protected symbol");
3369                       break;
3370                     default:
3371                       v = _("symbol");
3372                       break;
3373                     }
3374
3375                   (*_bfd_error_handler)
3376                     (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3377                      input_bfd, v, h->root.root.string);
3378                   bfd_set_error (bfd_error_bad_value);
3379                   return FALSE;
3380                 }
3381               else if (!info->executable
3382                        && h->type == STT_FUNC
3383                        && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3384                 {
3385                   (*_bfd_error_handler)
3386                     (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3387                      input_bfd, h->root.root.string);
3388                   bfd_set_error (bfd_error_bad_value);
3389                   return FALSE;
3390                 }
3391             }
3392
3393           /* Note that sgot is not involved in this
3394              calculation.  We always want the start of .got.plt.  If we
3395              defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3396              permitted by the ABI, we might have to change this
3397              calculation.  */
3398           relocation -= htab->elf.sgotplt->output_section->vma
3399                         + htab->elf.sgotplt->output_offset;
3400           break;
3401
3402         case R_386_GOTPC:
3403           /* Use global offset table as symbol value.  */
3404           relocation = htab->elf.sgotplt->output_section->vma
3405                        + htab->elf.sgotplt->output_offset;
3406           unresolved_reloc = FALSE;
3407           break;
3408
3409         case R_386_PLT32:
3410           /* Relocation is to the entry for this symbol in the
3411              procedure linkage table.  */
3412
3413           /* Resolve a PLT32 reloc against a local symbol directly,
3414              without using the procedure linkage table.  */
3415           if (h == NULL)
3416             break;
3417
3418           if (h->plt.offset == (bfd_vma) -1
3419               || htab->elf.splt == NULL)
3420             {
3421               /* We didn't make a PLT entry for this symbol.  This
3422                  happens when statically linking PIC code, or when
3423                  using -Bsymbolic.  */
3424               break;
3425             }
3426
3427           relocation = (htab->elf.splt->output_section->vma
3428                         + htab->elf.splt->output_offset
3429                         + h->plt.offset);
3430           unresolved_reloc = FALSE;
3431           break;
3432
3433         case R_386_32:
3434         case R_386_PC32:
3435           if ((input_section->flags & SEC_ALLOC) == 0
3436               || is_vxworks_tls)
3437             break;
3438
3439           if ((info->shared
3440                && (h == NULL
3441                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3442                    || h->root.type != bfd_link_hash_undefweak)
3443                && (r_type != R_386_PC32
3444                    || !SYMBOL_CALLS_LOCAL (info, h)))
3445               || (ELIMINATE_COPY_RELOCS
3446                   && !info->shared
3447                   && h != NULL
3448                   && h->dynindx != -1
3449                   && !h->non_got_ref
3450                   && ((h->def_dynamic
3451                        && !h->def_regular)
3452                       || h->root.type == bfd_link_hash_undefweak
3453                       || h->root.type == bfd_link_hash_undefined)))
3454             {
3455               Elf_Internal_Rela outrel;
3456               bfd_byte *loc;
3457               bfd_boolean skip, relocate;
3458               asection *sreloc;
3459
3460               /* When generating a shared object, these relocations
3461                  are copied into the output file to be resolved at run
3462                  time.  */
3463
3464               skip = FALSE;
3465               relocate = FALSE;
3466
3467               outrel.r_offset =
3468                 _bfd_elf_section_offset (output_bfd, info, input_section,
3469                                          rel->r_offset);
3470               if (outrel.r_offset == (bfd_vma) -1)
3471                 skip = TRUE;
3472               else if (outrel.r_offset == (bfd_vma) -2)
3473                 skip = TRUE, relocate = TRUE;
3474               outrel.r_offset += (input_section->output_section->vma
3475                                   + input_section->output_offset);
3476
3477               if (skip)
3478                 memset (&outrel, 0, sizeof outrel);
3479               else if (h != NULL
3480                        && h->dynindx != -1
3481                        && (r_type == R_386_PC32
3482                            || !info->shared
3483                            || !SYMBOLIC_BIND (info, h)
3484                            || !h->def_regular))
3485                 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3486               else
3487                 {
3488                   /* This symbol is local, or marked to become local.  */
3489                   relocate = TRUE;
3490                   outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3491                 }
3492
3493               sreloc = elf_section_data (input_section)->sreloc;
3494
3495               BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
3496
3497               loc = sreloc->contents;
3498               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3499
3500               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3501
3502               /* If this reloc is against an external symbol, we do
3503                  not want to fiddle with the addend.  Otherwise, we
3504                  need to include the symbol value so that it becomes
3505                  an addend for the dynamic reloc.  */
3506               if (! relocate)
3507                 continue;
3508             }
3509           break;
3510
3511         case R_386_TLS_IE:
3512           if (info->shared)
3513             {
3514               Elf_Internal_Rela outrel;
3515               bfd_byte *loc;
3516               asection *sreloc;
3517
3518               outrel.r_offset = rel->r_offset
3519                                 + input_section->output_section->vma
3520                                 + input_section->output_offset;
3521               outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3522               sreloc = elf_section_data (input_section)->sreloc;
3523               if (sreloc == NULL)
3524                 abort ();
3525               loc = sreloc->contents;
3526               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3527               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3528             }
3529           /* Fall through */
3530
3531         case R_386_TLS_GD:
3532         case R_386_TLS_GOTDESC:
3533         case R_386_TLS_DESC_CALL:
3534         case R_386_TLS_IE_32:
3535         case R_386_TLS_GOTIE:
3536           tls_type = GOT_UNKNOWN;
3537           if (h == NULL && local_got_offsets)
3538             tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3539           else if (h != NULL)
3540             tls_type = elf_i386_hash_entry(h)->tls_type;
3541           if (tls_type == GOT_TLS_IE)
3542             tls_type = GOT_TLS_IE_NEG;
3543
3544           if (! elf_i386_tls_transition (info, input_bfd,
3545                                          input_section, contents,
3546                                          symtab_hdr, sym_hashes,
3547                                          &r_type, tls_type, rel,
3548                                          relend, h))
3549             return FALSE;
3550
3551           if (r_type == R_386_TLS_LE_32)
3552             {
3553               BFD_ASSERT (! unresolved_reloc);
3554               if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3555                 {
3556                   unsigned int type;
3557                   bfd_vma roff;
3558
3559                   /* GD->LE transition.  */
3560                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3561                   if (type == 0x04)
3562                     {
3563                       /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3564                          Change it into:
3565                          movl %gs:0, %eax; subl $foo@tpoff, %eax
3566                          (6 byte form of subl).  */
3567                       memcpy (contents + rel->r_offset - 3,
3568                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3569                       roff = rel->r_offset + 5;
3570                     }
3571                   else
3572                     {
3573                       /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3574                          Change it into:
3575                          movl %gs:0, %eax; subl $foo@tpoff, %eax
3576                          (6 byte form of subl).  */
3577                       memcpy (contents + rel->r_offset - 2,
3578                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3579                       roff = rel->r_offset + 6;
3580                     }
3581                   bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3582                               contents + roff);
3583                   /* Skip R_386_PC32/R_386_PLT32.  */
3584                   rel++;
3585                   continue;
3586                 }
3587               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3588                 {
3589                   /* GDesc -> LE transition.
3590                      It's originally something like:
3591                      leal x@tlsdesc(%ebx), %eax
3592
3593                      leal x@ntpoff, %eax
3594
3595                      Registers other than %eax may be set up here.  */
3596
3597                   unsigned int val;
3598                   bfd_vma roff;
3599
3600                   roff = rel->r_offset;
3601                   val = bfd_get_8 (input_bfd, contents + roff - 1);
3602
3603                   /* Now modify the instruction as appropriate.  */
3604                   /* aoliva FIXME: remove the above and xor the byte
3605                      below with 0x86.  */
3606                   bfd_put_8 (output_bfd, val ^ 0x86,
3607                              contents + roff - 1);
3608                   bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3609                               contents + roff);
3610                   continue;
3611                 }
3612               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3613                 {
3614                   /* GDesc -> LE transition.
3615                      It's originally:
3616                      call *(%eax)
3617                      Turn it into:
3618                      xchg %ax,%ax  */
3619
3620                   bfd_vma roff;
3621
3622                   roff = rel->r_offset;
3623                   bfd_put_8 (output_bfd, 0x66, contents + roff);
3624                   bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3625                   continue;
3626                 }
3627               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3628                 {
3629                   unsigned int val;
3630
3631                   /* IE->LE transition:
3632                      Originally it can be one of:
3633                      movl foo, %eax
3634                      movl foo, %reg
3635                      addl foo, %reg
3636                      We change it into:
3637                      movl $foo, %eax
3638                      movl $foo, %reg
3639                      addl $foo, %reg.  */
3640                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3641                   if (val == 0xa1)
3642                     {
3643                       /* movl foo, %eax.  */
3644                       bfd_put_8 (output_bfd, 0xb8,
3645                                  contents + rel->r_offset - 1);
3646                     }
3647                   else
3648                     {
3649                       unsigned int type;
3650
3651                       type = bfd_get_8 (input_bfd,
3652                                         contents + rel->r_offset - 2);
3653                       switch (type)
3654                         {
3655                         case 0x8b:
3656                           /* movl */
3657                           bfd_put_8 (output_bfd, 0xc7,
3658                                      contents + rel->r_offset - 2);
3659                           bfd_put_8 (output_bfd,
3660                                      0xc0 | ((val >> 3) & 7),
3661                                      contents + rel->r_offset - 1);
3662                           break;
3663                         case 0x03:
3664                           /* addl */
3665                           bfd_put_8 (output_bfd, 0x81,
3666                                      contents + rel->r_offset - 2);
3667                           bfd_put_8 (output_bfd,
3668                                      0xc0 | ((val >> 3) & 7),
3669                                      contents + rel->r_offset - 1);
3670                           break;
3671                         default:
3672                           BFD_FAIL ();
3673                           break;
3674                         }
3675                     }
3676                   bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3677                               contents + rel->r_offset);
3678                   continue;
3679                 }
3680               else
3681                 {
3682                   unsigned int val, type;
3683
3684                   /* {IE_32,GOTIE}->LE transition:
3685                      Originally it can be one of:
3686                      subl foo(%reg1), %reg2
3687                      movl foo(%reg1), %reg2
3688                      addl foo(%reg1), %reg2
3689                      We change it into:
3690                      subl $foo, %reg2
3691                      movl $foo, %reg2 (6 byte form)
3692                      addl $foo, %reg2.  */
3693                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3694                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3695                   if (type == 0x8b)
3696                     {
3697                       /* movl */
3698                       bfd_put_8 (output_bfd, 0xc7,
3699                                  contents + rel->r_offset - 2);
3700                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3701                                  contents + rel->r_offset - 1);
3702                     }
3703                   else if (type == 0x2b)
3704                     {
3705                       /* subl */
3706                       bfd_put_8 (output_bfd, 0x81,
3707                                  contents + rel->r_offset - 2);
3708                       bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3709                                  contents + rel->r_offset - 1);
3710                     }
3711                   else if (type == 0x03)
3712                     {
3713                       /* addl */
3714                       bfd_put_8 (output_bfd, 0x81,
3715                                  contents + rel->r_offset - 2);
3716                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3717                                  contents + rel->r_offset - 1);
3718                     }
3719                   else
3720                     BFD_FAIL ();
3721                   if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3722                     bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3723                                 contents + rel->r_offset);
3724                   else
3725                     bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3726                                 contents + rel->r_offset);
3727                   continue;
3728                 }
3729             }
3730
3731           if (htab->elf.sgot == NULL)
3732             abort ();
3733
3734           if (h != NULL)
3735             {
3736               off = h->got.offset;
3737               offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3738             }
3739           else
3740             {
3741               if (local_got_offsets == NULL)
3742                 abort ();
3743
3744               off = local_got_offsets[r_symndx];
3745               offplt = local_tlsdesc_gotents[r_symndx];
3746             }
3747
3748           if ((off & 1) != 0)
3749             off &= ~1;
3750           else
3751             {
3752               Elf_Internal_Rela outrel;
3753               bfd_byte *loc;
3754               int dr_type, indx;
3755               asection *sreloc;
3756
3757               if (htab->elf.srelgot == NULL)
3758                 abort ();
3759
3760               indx = h && h->dynindx != -1 ? h->dynindx : 0;
3761
3762               if (GOT_TLS_GDESC_P (tls_type))
3763                 {
3764                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3765                   BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3766                               <= htab->elf.sgotplt->size);
3767                   outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3768                                      + htab->elf.sgotplt->output_offset
3769                                      + offplt
3770                                      + htab->sgotplt_jump_table_size);
3771                   sreloc = htab->elf.srelplt;
3772                   loc = sreloc->contents;
3773                   loc += (htab->next_tls_desc_index++
3774                           * sizeof (Elf32_External_Rel));
3775                   BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3776                               <= sreloc->contents + sreloc->size);
3777                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3778                   if (indx == 0)
3779                     {
3780                       BFD_ASSERT (! unresolved_reloc);
3781                       bfd_put_32 (output_bfd,
3782                                   relocation - elf_i386_dtpoff_base (info),
3783                                   htab->elf.sgotplt->contents + offplt
3784                                   + htab->sgotplt_jump_table_size + 4);
3785                     }
3786                   else
3787                     {
3788                       bfd_put_32 (output_bfd, 0,
3789                                   htab->elf.sgotplt->contents + offplt
3790                                   + htab->sgotplt_jump_table_size + 4);
3791                     }
3792                 }
3793
3794               sreloc = htab->elf.srelgot;
3795
3796               outrel.r_offset = (htab->elf.sgot->output_section->vma
3797                                  + htab->elf.sgot->output_offset + off);
3798
3799               if (GOT_TLS_GD_P (tls_type))
3800                 dr_type = R_386_TLS_DTPMOD32;
3801               else if (GOT_TLS_GDESC_P (tls_type))
3802                 goto dr_done;
3803               else if (tls_type == GOT_TLS_IE_POS)
3804                 dr_type = R_386_TLS_TPOFF;
3805               else
3806                 dr_type = R_386_TLS_TPOFF32;
3807
3808               if (dr_type == R_386_TLS_TPOFF && indx == 0)
3809                 bfd_put_32 (output_bfd,
3810                             relocation - elf_i386_dtpoff_base (info),
3811                             htab->elf.sgot->contents + off);
3812               else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3813                 bfd_put_32 (output_bfd,
3814                             elf_i386_dtpoff_base (info) - relocation,
3815                             htab->elf.sgot->contents + off);
3816               else if (dr_type != R_386_TLS_DESC)
3817                 bfd_put_32 (output_bfd, 0,
3818                             htab->elf.sgot->contents + off);
3819               outrel.r_info = ELF32_R_INFO (indx, dr_type);
3820
3821               loc = sreloc->contents;
3822               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3823               BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3824                           <= sreloc->contents + sreloc->size);
3825               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3826
3827               if (GOT_TLS_GD_P (tls_type))
3828                 {
3829                   if (indx == 0)
3830                     {
3831                       BFD_ASSERT (! unresolved_reloc);
3832                       bfd_put_32 (output_bfd,
3833                                   relocation - elf_i386_dtpoff_base (info),
3834                                   htab->elf.sgot->contents + off + 4);
3835                     }
3836                   else
3837                     {
3838                       bfd_put_32 (output_bfd, 0,
3839                                   htab->elf.sgot->contents + off + 4);
3840                       outrel.r_info = ELF32_R_INFO (indx,
3841                                                     R_386_TLS_DTPOFF32);
3842                       outrel.r_offset += 4;
3843                       sreloc->reloc_count++;
3844                       loc += sizeof (Elf32_External_Rel);
3845                       BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3846                                   <= sreloc->contents + sreloc->size);
3847                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3848                     }
3849                 }
3850               else if (tls_type == GOT_TLS_IE_BOTH)
3851                 {
3852                   bfd_put_32 (output_bfd,
3853                               (indx == 0
3854                                ? relocation - elf_i386_dtpoff_base (info)
3855                                : 0),
3856                               htab->elf.sgot->contents + off + 4);
3857                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3858                   outrel.r_offset += 4;
3859                   sreloc->reloc_count++;
3860                   loc += sizeof (Elf32_External_Rel);
3861                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3862                 }
3863
3864             dr_done:
3865               if (h != NULL)
3866                 h->got.offset |= 1;
3867               else
3868                 local_got_offsets[r_symndx] |= 1;
3869             }
3870
3871           if (off >= (bfd_vma) -2
3872               && ! GOT_TLS_GDESC_P (tls_type))
3873             abort ();
3874           if (r_type == R_386_TLS_GOTDESC
3875               || r_type == R_386_TLS_DESC_CALL)
3876             {
3877               relocation = htab->sgotplt_jump_table_size + offplt;
3878               unresolved_reloc = FALSE;
3879             }
3880           else if (r_type == ELF32_R_TYPE (rel->r_info))
3881             {
3882               bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3883                               + htab->elf.sgotplt->output_offset;
3884               relocation = htab->elf.sgot->output_section->vma
3885                 + htab->elf.sgot->output_offset + off - g_o_t;
3886               if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3887                   && tls_type == GOT_TLS_IE_BOTH)
3888                 relocation += 4;
3889               if (r_type == R_386_TLS_IE)
3890                 relocation += g_o_t;
3891               unresolved_reloc = FALSE;
3892             }
3893           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3894             {
3895               unsigned int val, type;
3896               bfd_vma roff;
3897
3898               /* GD->IE transition.  */
3899               type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3900               val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3901               if (type == 0x04)
3902                 {
3903                   /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3904                      Change it into:
3905                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
3906                   val >>= 3;
3907                   roff = rel->r_offset - 3;
3908                 }
3909               else
3910                 {
3911                   /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3912                      Change it into:
3913                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
3914                   roff = rel->r_offset - 2;
3915                 }
3916               memcpy (contents + roff,
3917                       "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3918               contents[roff + 7] = 0x80 | (val & 7);
3919               /* If foo is used only with foo@gotntpoff(%reg) and
3920                  foo@indntpoff, but not with foo@gottpoff(%reg), change
3921                  subl $foo@gottpoff(%reg), %eax
3922                  into:
3923                  addl $foo@gotntpoff(%reg), %eax.  */
3924               if (tls_type == GOT_TLS_IE_POS)
3925                 contents[roff + 6] = 0x03;
3926               bfd_put_32 (output_bfd,
3927                           htab->elf.sgot->output_section->vma
3928                           + htab->elf.sgot->output_offset + off
3929                           - htab->elf.sgotplt->output_section->vma
3930                           - htab->elf.sgotplt->output_offset,
3931                           contents + roff + 8);
3932               /* Skip R_386_PLT32.  */
3933               rel++;
3934               continue;
3935             }
3936           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3937             {
3938               /* GDesc -> IE transition.
3939                  It's originally something like:
3940                  leal x@tlsdesc(%ebx), %eax
3941
3942                  Change it to:
3943                  movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3944                  or:
3945                  movl x@gottpoff(%ebx), %eax # before negl %eax
3946
3947                  Registers other than %eax may be set up here.  */
3948
3949               bfd_vma roff;
3950
3951               /* First, make sure it's a leal adding ebx to a 32-bit
3952                  offset into any register, although it's probably
3953                  almost always going to be eax.  */
3954               roff = rel->r_offset;
3955
3956               /* Now modify the instruction as appropriate.  */
3957               /* To turn a leal into a movl in the form we use it, it
3958                  suffices to change the first byte from 0x8d to 0x8b.
3959                  aoliva FIXME: should we decide to keep the leal, all
3960                  we have to do is remove the statement below, and
3961                  adjust the relaxation of R_386_TLS_DESC_CALL.  */
3962               bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3963
3964               if (tls_type == GOT_TLS_IE_BOTH)
3965                 off += 4;
3966
3967               bfd_put_32 (output_bfd,
3968                           htab->elf.sgot->output_section->vma
3969                           + htab->elf.sgot->output_offset + off
3970                           - htab->elf.sgotplt->output_section->vma
3971                           - htab->elf.sgotplt->output_offset,
3972                           contents + roff);
3973               continue;
3974             }
3975           else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3976             {
3977               /* GDesc -> IE transition.
3978                  It's originally:
3979                  call *(%eax)
3980
3981                  Change it to:
3982                  xchg %ax,%ax
3983                  or
3984                  negl %eax
3985                  depending on how we transformed the TLS_GOTDESC above.
3986               */
3987
3988               bfd_vma roff;
3989
3990               roff = rel->r_offset;
3991
3992               /* Now modify the instruction as appropriate.  */
3993               if (tls_type != GOT_TLS_IE_NEG)
3994                 {
3995                   /* xchg %ax,%ax */
3996                   bfd_put_8 (output_bfd, 0x66, contents + roff);
3997                   bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3998                 }
3999               else
4000                 {
4001                   /* negl %eax */
4002                   bfd_put_8 (output_bfd, 0xf7, contents + roff);
4003                   bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4004                 }
4005
4006               continue;
4007             }
4008           else
4009             BFD_ASSERT (FALSE);
4010           break;
4011
4012         case R_386_TLS_LDM:
4013           if (! elf_i386_tls_transition (info, input_bfd,
4014                                          input_section, contents,
4015                                          symtab_hdr, sym_hashes,
4016                                          &r_type, GOT_UNKNOWN, rel,
4017                                          relend, h))
4018             return FALSE;
4019
4020           if (r_type != R_386_TLS_LDM)
4021             {
4022               /* LD->LE transition:
4023                  leal foo(%reg), %eax; call ___tls_get_addr.
4024                  We change it into:
4025                  movl %gs:0, %eax; nop; leal 0(%esi,1), %esi.  */
4026               BFD_ASSERT (r_type == R_386_TLS_LE_32);
4027               memcpy (contents + rel->r_offset - 2,
4028                       "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4029               /* Skip R_386_PC32/R_386_PLT32.  */
4030               rel++;
4031               continue;
4032             }
4033
4034           if (htab->elf.sgot == NULL)
4035             abort ();
4036
4037           off = htab->tls_ldm_got.offset;
4038           if (off & 1)
4039             off &= ~1;
4040           else
4041             {
4042               Elf_Internal_Rela outrel;
4043               bfd_byte *loc;
4044
4045               if (htab->elf.srelgot == NULL)
4046                 abort ();
4047
4048               outrel.r_offset = (htab->elf.sgot->output_section->vma
4049                                  + htab->elf.sgot->output_offset + off);
4050
4051               bfd_put_32 (output_bfd, 0,
4052                           htab->elf.sgot->contents + off);
4053               bfd_put_32 (output_bfd, 0,
4054                           htab->elf.sgot->contents + off + 4);
4055               outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4056               loc = htab->elf.srelgot->contents;
4057               loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4058               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4059               htab->tls_ldm_got.offset |= 1;
4060             }
4061           relocation = htab->elf.sgot->output_section->vma
4062                        + htab->elf.sgot->output_offset + off
4063                        - htab->elf.sgotplt->output_section->vma
4064                        - htab->elf.sgotplt->output_offset;
4065           unresolved_reloc = FALSE;
4066           break;
4067
4068         case R_386_TLS_LDO_32:
4069           if (info->shared || (input_section->flags & SEC_CODE) == 0)
4070             relocation -= elf_i386_dtpoff_base (info);
4071           else
4072             /* When converting LDO to LE, we must negate.  */
4073             relocation = -elf_i386_tpoff (info, relocation);
4074           break;
4075
4076         case R_386_TLS_LE_32:
4077         case R_386_TLS_LE:
4078           if (info->shared)
4079             {
4080               Elf_Internal_Rela outrel;
4081               asection *sreloc;
4082               bfd_byte *loc;
4083               int indx;
4084
4085               outrel.r_offset = rel->r_offset
4086                                 + input_section->output_section->vma
4087                                 + input_section->output_offset;
4088               if (h != NULL && h->dynindx != -1)
4089                 indx = h->dynindx;
4090               else
4091                 indx = 0;
4092               if (r_type == R_386_TLS_LE_32)
4093                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4094               else
4095                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4096               sreloc = elf_section_data (input_section)->sreloc;
4097               if (sreloc == NULL)
4098                 abort ();
4099               loc = sreloc->contents;
4100               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
4101               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4102               if (indx)
4103                 continue;
4104               else if (r_type == R_386_TLS_LE_32)
4105                 relocation = elf_i386_dtpoff_base (info) - relocation;
4106               else
4107                 relocation -= elf_i386_dtpoff_base (info);
4108             }
4109           else if (r_type == R_386_TLS_LE_32)
4110             relocation = elf_i386_tpoff (info, relocation);
4111           else
4112             relocation = -elf_i386_tpoff (info, relocation);
4113           break;
4114
4115         default:
4116           break;
4117         }
4118
4119       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4120          because such sections are not SEC_ALLOC and thus ld.so will
4121          not process them.  */
4122       if (unresolved_reloc
4123           && !((input_section->flags & SEC_DEBUGGING) != 0
4124                && h->def_dynamic))
4125         {
4126           (*_bfd_error_handler)
4127             (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4128              input_bfd,
4129              input_section,
4130              (long) rel->r_offset,
4131              howto->name,
4132              h->root.root.string);
4133           return FALSE;
4134         }
4135
4136 do_relocation:
4137       r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4138                                     contents, rel->r_offset,
4139                                     relocation, 0);
4140
4141       if (r != bfd_reloc_ok)
4142         {
4143           const char *name;
4144
4145           if (h != NULL)
4146             name = h->root.root.string;
4147           else
4148             {
4149               name = bfd_elf_string_from_elf_section (input_bfd,
4150                                                       symtab_hdr->sh_link,
4151                                                       sym->st_name);
4152               if (name == NULL)
4153                 return FALSE;
4154               if (*name == '\0')
4155                 name = bfd_section_name (input_bfd, sec);
4156             }
4157
4158           if (r == bfd_reloc_overflow)
4159             {
4160               if (! ((*info->callbacks->reloc_overflow)
4161                      (info, (h ? &h->root : NULL), name, howto->name,
4162                       (bfd_vma) 0, input_bfd, input_section,
4163                       rel->r_offset)))
4164                 return FALSE;
4165             }
4166           else
4167             {
4168               (*_bfd_error_handler)
4169                 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4170                  input_bfd, input_section,
4171                  (long) rel->r_offset, name, (int) r);
4172               return FALSE;
4173             }
4174         }
4175     }
4176
4177   return TRUE;
4178 }
4179
4180 /* Finish up dynamic symbol handling.  We set the contents of various
4181    dynamic sections here.  */
4182
4183 static bfd_boolean
4184 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4185                                 struct bfd_link_info *info,
4186                                 struct elf_link_hash_entry *h,
4187                                 Elf_Internal_Sym *sym)
4188 {
4189   struct elf_i386_link_hash_table *htab;
4190
4191   htab = elf_i386_hash_table (info);
4192
4193   if (h->plt.offset != (bfd_vma) -1)
4194     {
4195       bfd_vma plt_index;
4196       bfd_vma got_offset;
4197       Elf_Internal_Rela rel;
4198       bfd_byte *loc;
4199       asection *plt, *gotplt, *relplt;
4200
4201       /* When building a static executable, use .iplt, .igot.plt and
4202          .rel.iplt sections for STT_GNU_IFUNC symbols.  */
4203       if (htab->elf.splt != NULL)
4204         {
4205           plt = htab->elf.splt;
4206           gotplt = htab->elf.sgotplt;
4207           relplt = htab->elf.srelplt;
4208         }
4209       else
4210         {
4211           plt = htab->elf.iplt;
4212           gotplt = htab->elf.igotplt;
4213           relplt = htab->elf.irelplt;
4214         }
4215
4216       /* This symbol has an entry in the procedure linkage table.  Set
4217          it up.  */
4218
4219       if ((h->dynindx == -1
4220            && !((h->forced_local || info->executable)
4221                 && h->def_regular
4222                 && h->type == STT_GNU_IFUNC))
4223           || plt == NULL
4224           || gotplt == NULL
4225           || relplt == NULL)
4226         abort ();
4227
4228       /* Get the index in the procedure linkage table which
4229          corresponds to this symbol.  This is the index of this symbol
4230          in all the symbols for which we are making plt entries.  The
4231          first entry in the procedure linkage table is reserved.
4232
4233          Get the offset into the .got table of the entry that
4234          corresponds to this function.  Each .got entry is 4 bytes.
4235          The first three are reserved.
4236
4237          For static executables, we don't reserve anything.  */
4238
4239       if (plt == htab->elf.splt)
4240         {
4241           plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
4242           got_offset = (plt_index + 3) * 4;
4243         }
4244       else
4245         {
4246           plt_index = h->plt.offset / PLT_ENTRY_SIZE;
4247           got_offset = plt_index * 4;
4248         }
4249
4250       /* Fill in the entry in the procedure linkage table.  */
4251       if (! info->shared)
4252         {
4253           memcpy (plt->contents + h->plt.offset, elf_i386_plt_entry,
4254                   PLT_ENTRY_SIZE);
4255           bfd_put_32 (output_bfd,
4256                       (gotplt->output_section->vma
4257                        + gotplt->output_offset
4258                        + got_offset),
4259                       plt->contents + h->plt.offset + 2);
4260
4261           if (htab->is_vxworks)
4262             {
4263               int s, k, reloc_index;
4264
4265               /* Create the R_386_32 relocation referencing the GOT
4266                  for this PLT entry.  */
4267
4268               /* S: Current slot number (zero-based).  */
4269               s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
4270               /* K: Number of relocations for PLTResolve. */
4271               if (info->shared)
4272                 k = PLTRESOLVE_RELOCS_SHLIB;
4273               else
4274                 k = PLTRESOLVE_RELOCS;
4275               /* Skip the PLTresolve relocations, and the relocations for
4276                  the other PLT slots. */
4277               reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4278               loc = (htab->srelplt2->contents + reloc_index
4279                      * sizeof (Elf32_External_Rel));
4280
4281               rel.r_offset = (htab->elf.splt->output_section->vma
4282                               + htab->elf.splt->output_offset
4283                               + h->plt.offset + 2),
4284               rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4285               bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4286
4287               /* Create the R_386_32 relocation referencing the beginning of
4288                  the PLT for this GOT entry.  */
4289               rel.r_offset = (htab->elf.sgotplt->output_section->vma
4290                               + htab->elf.sgotplt->output_offset
4291                               + got_offset);
4292               rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4293               bfd_elf32_swap_reloc_out (output_bfd, &rel,
4294               loc + sizeof (Elf32_External_Rel));
4295             }
4296         }
4297       else
4298         {
4299           memcpy (plt->contents + h->plt.offset, elf_i386_pic_plt_entry,
4300                   PLT_ENTRY_SIZE);
4301           bfd_put_32 (output_bfd, got_offset,
4302                       plt->contents + h->plt.offset + 2);
4303         }
4304
4305       /* Don't fill PLT entry for static executables.  */
4306       if (plt == htab->elf.splt)
4307         {
4308           bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4309                       plt->contents + h->plt.offset + 7);
4310           bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
4311                       plt->contents + h->plt.offset + 12);
4312         }
4313
4314       /* Fill in the entry in the global offset table.  */
4315       bfd_put_32 (output_bfd,
4316                   (plt->output_section->vma
4317                    + plt->output_offset
4318                    + h->plt.offset
4319                    + 6),
4320                   gotplt->contents + got_offset);
4321
4322       /* Fill in the entry in the .rel.plt section.  */
4323       rel.r_offset = (gotplt->output_section->vma
4324                       + gotplt->output_offset
4325                       + got_offset);
4326       if (h->dynindx == -1
4327           || ((info->executable
4328                || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4329               && h->def_regular
4330                && h->type == STT_GNU_IFUNC))
4331         {
4332           /* If an STT_GNU_IFUNC symbol is locally defined, generate
4333              R_386_IRELATIVE instead of R_386_JUMP_SLOT.  Store addend
4334              in the .got.plt section.  */
4335           bfd_put_32 (output_bfd,
4336                       (h->root.u.def.value
4337                        + h->root.u.def.section->output_section->vma
4338                        + h->root.u.def.section->output_offset),
4339                       gotplt->contents + got_offset);
4340           rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4341         }
4342       else
4343         rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4344       loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4345       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4346
4347       if (!h->def_regular)
4348         {
4349           /* Mark the symbol as undefined, rather than as defined in
4350              the .plt section.  Leave the value if there were any
4351              relocations where pointer equality matters (this is a clue
4352              for the dynamic linker, to make function pointer
4353              comparisons work between an application and shared
4354              library), otherwise set it to zero.  If a function is only
4355              called from a binary, there is no need to slow down
4356              shared libraries because of that.  */
4357           sym->st_shndx = SHN_UNDEF;
4358           if (!h->pointer_equality_needed)
4359             sym->st_value = 0;
4360         }
4361     }
4362
4363   if (h->got.offset != (bfd_vma) -1
4364       && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4365       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4366     {
4367       Elf_Internal_Rela rel;
4368       bfd_byte *loc;
4369
4370       /* This symbol has an entry in the global offset table.  Set it
4371          up.  */
4372
4373       if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4374         abort ();
4375
4376       rel.r_offset = (htab->elf.sgot->output_section->vma
4377                       + htab->elf.sgot->output_offset
4378                       + (h->got.offset & ~(bfd_vma) 1));
4379
4380       /* If this is a static link, or it is a -Bsymbolic link and the
4381          symbol is defined locally or was forced to be local because
4382          of a version file, we just want to emit a RELATIVE reloc.
4383          The entry in the global offset table will already have been
4384          initialized in the relocate_section function.  */
4385       if (h->def_regular
4386           && h->type == STT_GNU_IFUNC)
4387         {
4388           if (info->shared)
4389             {
4390               /* Generate R_386_GLOB_DAT.  */
4391               goto do_glob_dat;
4392             }
4393           else
4394             {
4395               if (!h->pointer_equality_needed)
4396                 abort ();
4397
4398               /* For non-shared object, we can't use .got.plt, which
4399                  contains the real function addres if we need pointer
4400                  equality.  We load the GOT entry with the PLT entry.  */
4401               asection *plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4402               bfd_put_32 (output_bfd,
4403                           (plt->output_section->vma
4404                            + plt->output_offset + h->plt.offset),
4405                           htab->elf.sgot->contents + h->got.offset);
4406               return TRUE;
4407             }
4408         }
4409       else if (info->shared
4410                && SYMBOL_REFERENCES_LOCAL (info, h))
4411         {
4412           BFD_ASSERT((h->got.offset & 1) != 0);
4413           rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4414         }
4415       else
4416         {
4417           BFD_ASSERT((h->got.offset & 1) == 0);
4418 do_glob_dat:
4419           bfd_put_32 (output_bfd, (bfd_vma) 0,
4420                       htab->elf.sgot->contents + h->got.offset);
4421           rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4422         }
4423
4424       loc = htab->elf.srelgot->contents;
4425       loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4426       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4427     }
4428
4429   if (h->needs_copy)
4430     {
4431       Elf_Internal_Rela rel;
4432       bfd_byte *loc;
4433
4434       /* This symbol needs a copy reloc.  Set it up.  */
4435
4436       if (h->dynindx == -1
4437           || (h->root.type != bfd_link_hash_defined
4438               && h->root.type != bfd_link_hash_defweak)
4439           || htab->srelbss == NULL)
4440         abort ();
4441
4442       rel.r_offset = (h->root.u.def.value
4443                       + h->root.u.def.section->output_section->vma
4444                       + h->root.u.def.section->output_offset);
4445       rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4446       loc = htab->srelbss->contents;
4447       loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
4448       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4449     }
4450
4451   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  SYM may
4452      be NULL for local symbols.
4453
4454      On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4455      is relative to the ".got" section.  */
4456   if (sym != NULL
4457       && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4458           || (!htab->is_vxworks && h == htab->elf.hgot)))
4459     sym->st_shndx = SHN_ABS;
4460
4461   return TRUE;
4462 }
4463
4464 /* Finish up local dynamic symbol handling.  We set the contents of
4465    various dynamic sections here.  */
4466
4467 static bfd_boolean
4468 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4469 {
4470   struct elf_link_hash_entry *h
4471     = (struct elf_link_hash_entry *) *slot;
4472   struct bfd_link_info *info
4473     = (struct bfd_link_info *) inf;
4474
4475   return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4476                                          h, NULL);
4477 }
4478
4479 /* Used to decide how to sort relocs in an optimal manner for the
4480    dynamic linker, before writing them out.  */
4481
4482 static enum elf_reloc_type_class
4483 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
4484 {
4485   switch (ELF32_R_TYPE (rela->r_info))
4486     {
4487     case R_386_RELATIVE:
4488       return reloc_class_relative;
4489     case R_386_JUMP_SLOT:
4490       return reloc_class_plt;
4491     case R_386_COPY:
4492       return reloc_class_copy;
4493     default:
4494       return reloc_class_normal;
4495     }
4496 }
4497
4498 /* Finish up the dynamic sections.  */
4499
4500 static bfd_boolean
4501 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4502                                   struct bfd_link_info *info)
4503 {
4504   struct elf_i386_link_hash_table *htab;
4505   bfd *dynobj;
4506   asection *sdyn;
4507
4508   htab = elf_i386_hash_table (info);
4509   dynobj = htab->elf.dynobj;
4510   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4511
4512   if (htab->elf.dynamic_sections_created)
4513     {
4514       Elf32_External_Dyn *dyncon, *dynconend;
4515
4516       if (sdyn == NULL || htab->elf.sgot == NULL)
4517         abort ();
4518
4519       dyncon = (Elf32_External_Dyn *) sdyn->contents;
4520       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4521       for (; dyncon < dynconend; dyncon++)
4522         {
4523           Elf_Internal_Dyn dyn;
4524           asection *s;
4525
4526           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4527
4528           switch (dyn.d_tag)
4529             {
4530             default:
4531               if (htab->is_vxworks
4532                   && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4533                 break;
4534               continue;
4535
4536             case DT_PLTGOT:
4537               s = htab->elf.sgotplt;
4538               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4539               break;
4540
4541             case DT_JMPREL:
4542               s = htab->elf.srelplt;
4543               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4544               break;
4545
4546             case DT_PLTRELSZ:
4547               s = htab->elf.srelplt;
4548               dyn.d_un.d_val = s->size;
4549               break;
4550
4551             case DT_RELSZ:
4552               /* My reading of the SVR4 ABI indicates that the
4553                  procedure linkage table relocs (DT_JMPREL) should be
4554                  included in the overall relocs (DT_REL).  This is
4555                  what Solaris does.  However, UnixWare can not handle
4556                  that case.  Therefore, we override the DT_RELSZ entry
4557                  here to make it not include the JMPREL relocs.  */
4558               s = htab->elf.srelplt;
4559               if (s == NULL)
4560                 continue;
4561               dyn.d_un.d_val -= s->size;
4562               break;
4563
4564             case DT_REL:
4565               /* We may not be using the standard ELF linker script.
4566                  If .rel.plt is the first .rel section, we adjust
4567                  DT_REL to not include it.  */
4568               s = htab->elf.srelplt;
4569               if (s == NULL)
4570                 continue;
4571               if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4572                 continue;
4573               dyn.d_un.d_ptr += s->size;
4574               break;
4575             }
4576
4577           bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4578         }
4579
4580       /* Fill in the first entry in the procedure linkage table.  */
4581       if (htab->elf.splt && htab->elf.splt->size > 0)
4582         {
4583           if (info->shared)
4584             {
4585               memcpy (htab->elf.splt->contents, elf_i386_pic_plt0_entry,
4586                       sizeof (elf_i386_pic_plt0_entry));
4587               memset (htab->elf.splt->contents + sizeof (elf_i386_pic_plt0_entry),
4588                       htab->plt0_pad_byte,
4589                       PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
4590             }
4591           else
4592             {
4593               memcpy (htab->elf.splt->contents, elf_i386_plt0_entry,
4594                       sizeof(elf_i386_plt0_entry));
4595               memset (htab->elf.splt->contents + sizeof (elf_i386_plt0_entry),
4596                       htab->plt0_pad_byte,
4597                       PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
4598               bfd_put_32 (output_bfd,
4599                           (htab->elf.sgotplt->output_section->vma
4600                            + htab->elf.sgotplt->output_offset
4601                            + 4),
4602                           htab->elf.splt->contents + 2);
4603               bfd_put_32 (output_bfd,
4604                           (htab->elf.sgotplt->output_section->vma
4605                            + htab->elf.sgotplt->output_offset
4606                            + 8),
4607                           htab->elf.splt->contents + 8);
4608
4609               if (htab->is_vxworks)
4610                 {
4611                   Elf_Internal_Rela rel;
4612
4613                   /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4614                      On IA32 we use REL relocations so the addend goes in
4615                      the PLT directly.  */
4616                   rel.r_offset = (htab->elf.splt->output_section->vma
4617                                   + htab->elf.splt->output_offset
4618                                   + 2);
4619                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4620                   bfd_elf32_swap_reloc_out (output_bfd, &rel,
4621                                             htab->srelplt2->contents);
4622                   /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8.  */
4623                   rel.r_offset = (htab->elf.splt->output_section->vma
4624                                   + htab->elf.splt->output_offset
4625                                   + 8);
4626                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4627                   bfd_elf32_swap_reloc_out (output_bfd, &rel,
4628                                             htab->srelplt2->contents +
4629                                             sizeof (Elf32_External_Rel));
4630                 }
4631             }
4632
4633           /* UnixWare sets the entsize of .plt to 4, although that doesn't
4634              really seem like the right value.  */
4635           elf_section_data (htab->elf.splt->output_section)
4636             ->this_hdr.sh_entsize = 4;
4637
4638           /* Correct the .rel.plt.unloaded relocations.  */
4639           if (htab->is_vxworks && !info->shared)
4640             {
4641               int num_plts = (htab->elf.splt->size / PLT_ENTRY_SIZE) - 1;
4642               unsigned char *p;
4643
4644               p = htab->srelplt2->contents;
4645               if (info->shared)
4646                 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4647               else
4648                 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4649
4650               for (; num_plts; num_plts--)
4651                 {
4652                   Elf_Internal_Rela rel;
4653                   bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4654                   rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4655                   bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4656                   p += sizeof (Elf32_External_Rel);
4657
4658                   bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4659                   rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4660                   bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4661                   p += sizeof (Elf32_External_Rel);
4662                 }
4663             }
4664         }
4665     }
4666
4667   if (htab->elf.sgotplt)
4668     {
4669       /* Fill in the first three entries in the global offset table.  */
4670       if (htab->elf.sgotplt->size > 0)
4671         {
4672           bfd_put_32 (output_bfd,
4673                       (sdyn == NULL ? 0
4674                        : sdyn->output_section->vma + sdyn->output_offset),
4675                       htab->elf.sgotplt->contents);
4676           bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4677           bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4678         }
4679
4680       elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4681     }
4682
4683   if (htab->elf.sgot && htab->elf.sgot->size > 0)
4684     elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4685
4686   /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols.  */
4687   htab_traverse (htab->loc_hash_table,
4688                  elf_i386_finish_local_dynamic_symbol,
4689                  info);
4690
4691   return TRUE;
4692 }
4693
4694 /* Return address for Ith PLT stub in section PLT, for relocation REL
4695    or (bfd_vma) -1 if it should not be included.  */
4696
4697 static bfd_vma
4698 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4699                       const arelent *rel ATTRIBUTE_UNUSED)
4700 {
4701   return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4702 }
4703
4704 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section.  */
4705
4706 static bfd_boolean
4707 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
4708 {
4709   if (h->plt.offset != (bfd_vma) -1
4710       && !h->def_regular
4711       && !h->pointer_equality_needed)
4712     return FALSE;
4713
4714   return _bfd_elf_hash_symbol (h);
4715 }
4716
4717 /* Hook called by the linker routine which adds symbols from an object
4718    file.  */
4719
4720 static bfd_boolean
4721 elf_i386_add_symbol_hook (bfd * abfd ATTRIBUTE_UNUSED,
4722                           struct bfd_link_info * info ATTRIBUTE_UNUSED,
4723                           Elf_Internal_Sym * sym,
4724                           const char ** namep ATTRIBUTE_UNUSED,
4725                           flagword * flagsp ATTRIBUTE_UNUSED,
4726                           asection ** secp ATTRIBUTE_UNUSED,
4727                           bfd_vma * valp ATTRIBUTE_UNUSED)
4728 {
4729   if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4730     elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4731
4732   return TRUE;
4733 }
4734
4735 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vec
4736 #define TARGET_LITTLE_NAME              "elf32-i386"
4737 #define ELF_ARCH                        bfd_arch_i386
4738 #define ELF_MACHINE_CODE                EM_386
4739 #define ELF_MAXPAGESIZE                 0x1000
4740
4741 #define elf_backend_can_gc_sections     1
4742 #define elf_backend_can_refcount        1
4743 #define elf_backend_want_got_plt        1
4744 #define elf_backend_plt_readonly        1
4745 #define elf_backend_want_plt_sym        0
4746 #define elf_backend_got_header_size     12
4747
4748 /* Support RELA for objdump of prelink objects.  */
4749 #define elf_info_to_howto                     elf_i386_info_to_howto_rel
4750 #define elf_info_to_howto_rel                 elf_i386_info_to_howto_rel
4751
4752 #define bfd_elf32_mkobject                    elf_i386_mkobject
4753
4754 #define bfd_elf32_bfd_is_local_label_name     elf_i386_is_local_label_name
4755 #define bfd_elf32_bfd_link_hash_table_create  elf_i386_link_hash_table_create
4756 #define bfd_elf32_bfd_link_hash_table_free    elf_i386_link_hash_table_free
4757 #define bfd_elf32_bfd_reloc_type_lookup       elf_i386_reloc_type_lookup
4758 #define bfd_elf32_bfd_reloc_name_lookup       elf_i386_reloc_name_lookup
4759
4760 #define elf_backend_adjust_dynamic_symbol     elf_i386_adjust_dynamic_symbol
4761 #define elf_backend_relocs_compatible         _bfd_elf_relocs_compatible
4762 #define elf_backend_check_relocs              elf_i386_check_relocs
4763 #define elf_backend_copy_indirect_symbol      elf_i386_copy_indirect_symbol
4764 #define elf_backend_create_dynamic_sections   elf_i386_create_dynamic_sections
4765 #define elf_backend_fake_sections             elf_i386_fake_sections
4766 #define elf_backend_finish_dynamic_sections   elf_i386_finish_dynamic_sections
4767 #define elf_backend_finish_dynamic_symbol     elf_i386_finish_dynamic_symbol
4768 #define elf_backend_gc_mark_hook              elf_i386_gc_mark_hook
4769 #define elf_backend_gc_sweep_hook             elf_i386_gc_sweep_hook
4770 #define elf_backend_grok_prstatus             elf_i386_grok_prstatus
4771 #define elf_backend_grok_psinfo               elf_i386_grok_psinfo
4772 #define elf_backend_reloc_type_class          elf_i386_reloc_type_class
4773 #define elf_backend_relocate_section          elf_i386_relocate_section
4774 #define elf_backend_size_dynamic_sections     elf_i386_size_dynamic_sections
4775 #define elf_backend_always_size_sections      elf_i386_always_size_sections
4776 #define elf_backend_omit_section_dynsym \
4777   ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4778 #define elf_backend_plt_sym_val               elf_i386_plt_sym_val
4779 #define elf_backend_hash_symbol               elf_i386_hash_symbol
4780 #define elf_backend_add_symbol_hook           elf_i386_add_symbol_hook
4781 #undef  elf_backend_post_process_headers
4782 #define elf_backend_post_process_headers        _bfd_elf_set_osabi
4783
4784 #include "elf32-target.h"
4785
4786 /* FreeBSD support.  */
4787
4788 #undef  TARGET_LITTLE_SYM
4789 #define TARGET_LITTLE_SYM               bfd_elf32_i386_freebsd_vec
4790 #undef  TARGET_LITTLE_NAME
4791 #define TARGET_LITTLE_NAME              "elf32-i386-freebsd"
4792 #undef  ELF_OSABI
4793 #define ELF_OSABI                       ELFOSABI_FREEBSD
4794
4795 /* The kernel recognizes executables as valid only if they carry a
4796    "FreeBSD" label in the ELF header.  So we put this label on all
4797    executables and (for simplicity) also all other object files.  */
4798
4799 static void
4800 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4801 {
4802   _bfd_elf_set_osabi (abfd, info);
4803
4804 #ifdef OLD_FREEBSD_ABI_LABEL
4805   /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
4806   memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4807 #endif
4808 }
4809
4810 #undef  elf_backend_post_process_headers
4811 #define elf_backend_post_process_headers        elf_i386_fbsd_post_process_headers
4812 #undef  elf32_bed
4813 #define elf32_bed                               elf32_i386_fbsd_bed
4814
4815 #undef elf_backend_add_symbol_hook
4816
4817 #include "elf32-target.h"
4818
4819 /* VxWorks support.  */
4820
4821 #undef  TARGET_LITTLE_SYM
4822 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vxworks_vec
4823 #undef  TARGET_LITTLE_NAME
4824 #define TARGET_LITTLE_NAME              "elf32-i386-vxworks"
4825 #undef  ELF_OSABI
4826
4827 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks.  */
4828
4829 static struct bfd_link_hash_table *
4830 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4831 {
4832   struct bfd_link_hash_table *ret;
4833   struct elf_i386_link_hash_table *htab;
4834
4835   ret = elf_i386_link_hash_table_create (abfd);
4836   if (ret)
4837     {
4838       htab = (struct elf_i386_link_hash_table *) ret;
4839       htab->is_vxworks = 1;
4840       htab->plt0_pad_byte = 0x90;
4841     }
4842
4843   return ret;
4844 }
4845
4846
4847 #undef elf_backend_relocs_compatible
4848 #undef elf_backend_post_process_headers
4849 #undef bfd_elf32_bfd_link_hash_table_create
4850 #define bfd_elf32_bfd_link_hash_table_create \
4851   elf_i386_vxworks_link_hash_table_create
4852 #undef elf_backend_add_symbol_hook
4853 #define elf_backend_add_symbol_hook \
4854   elf_vxworks_add_symbol_hook
4855 #undef elf_backend_link_output_symbol_hook
4856 #define elf_backend_link_output_symbol_hook \
4857   elf_vxworks_link_output_symbol_hook
4858 #undef elf_backend_emit_relocs
4859 #define elf_backend_emit_relocs                 elf_vxworks_emit_relocs
4860 #undef elf_backend_final_write_processing
4861 #define elf_backend_final_write_processing \
4862   elf_vxworks_final_write_processing
4863
4864 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4865    define it.  */
4866 #undef elf_backend_want_plt_sym
4867 #define elf_backend_want_plt_sym        1
4868
4869 #undef  elf32_bed
4870 #define elf32_bed                               elf32_i386_vxworks_bed
4871
4872 #include "elf32-target.h"