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 Free Software Foundation, Inc.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "bfdlink.h"
  24 #include "libbfd.h"
  25 #include "elf-bfd.h"
  26
  27 /* 386 uses REL relocations instead of RELA.  */
  28 #define USE_REL 1
  29
  30 #include "elf/i386.h"
  31
  32 static reloc_howto_type elf_howto_table[]=
  33 {
  34   HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
  35         bfd_elf_generic_reloc, "R_386_NONE",
  36         TRUE, 0x00000000, 0x00000000, FALSE),
  37   HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  38         bfd_elf_generic_reloc, "R_386_32",
  39         TRUE, 0xffffffff, 0xffffffff, FALSE),
  40   HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  41         bfd_elf_generic_reloc, "R_386_PC32",
  42         TRUE, 0xffffffff, 0xffffffff, TRUE),
  43   HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  44         bfd_elf_generic_reloc, "R_386_GOT32",
  45         TRUE, 0xffffffff, 0xffffffff, FALSE),
  46   HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  47         bfd_elf_generic_reloc, "R_386_PLT32",
  48         TRUE, 0xffffffff, 0xffffffff, TRUE),
  49   HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  50         bfd_elf_generic_reloc, "R_386_COPY",
  51         TRUE, 0xffffffff, 0xffffffff, FALSE),
  52   HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  53         bfd_elf_generic_reloc, "R_386_GLOB_DAT",
  54         TRUE, 0xffffffff, 0xffffffff, FALSE),
  55   HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  56         bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
  57         TRUE, 0xffffffff, 0xffffffff, FALSE),
  58   HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  59         bfd_elf_generic_reloc, "R_386_RELATIVE",
  60         TRUE, 0xffffffff, 0xffffffff, FALSE),
  61   HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  62         bfd_elf_generic_reloc, "R_386_GOTOFF",
  63         TRUE, 0xffffffff, 0xffffffff, FALSE),
  64   HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
  65         bfd_elf_generic_reloc, "R_386_GOTPC",
  66         TRUE, 0xffffffff, 0xffffffff, TRUE),
  67
  68   /* We have a gap in the reloc numbers here.
  69      R_386_standard counts the number up to this point, and
  70      R_386_ext_offset is the value to subtract from a reloc type of
  71      R_386_16 thru R_386_PC8 to form an index into this table.  */
  72 #define R_386_standard (R_386_GOTPC + 1)
  73 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
  74
  75   /* These relocs are a GNU extension.  */
  76   HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  77         bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
  78         TRUE, 0xffffffff, 0xffffffff, FALSE),
  79   HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  80         bfd_elf_generic_reloc, "R_386_TLS_IE",
  81         TRUE, 0xffffffff, 0xffffffff, FALSE),
  82   HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  83         bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
  84         TRUE, 0xffffffff, 0xffffffff, FALSE),
  85   HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  86         bfd_elf_generic_reloc, "R_386_TLS_LE",
  87         TRUE, 0xffffffff, 0xffffffff, FALSE),
  88   HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  89         bfd_elf_generic_reloc, "R_386_TLS_GD",
  90         TRUE, 0xffffffff, 0xffffffff, FALSE),
  91   HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  92         bfd_elf_generic_reloc, "R_386_TLS_LDM",
  93         TRUE, 0xffffffff, 0xffffffff, FALSE),
  94   HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
  95         bfd_elf_generic_reloc, "R_386_16",
  96         TRUE, 0xffff, 0xffff, FALSE),
  97   HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
  98         bfd_elf_generic_reloc, "R_386_PC16",
  99         TRUE, 0xffff, 0xffff, TRUE),
 100   HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
 101         bfd_elf_generic_reloc, "R_386_8",
 102         TRUE, 0xff, 0xff, FALSE),
 103   HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
 104         bfd_elf_generic_reloc, "R_386_PC8",
 105         TRUE, 0xff, 0xff, TRUE),
 106
 107 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
 108 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
 109   /* These are common with Solaris TLS implementation.  */
 110   HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 111         bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
 112         TRUE, 0xffffffff, 0xffffffff, FALSE),
 113   HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 114         bfd_elf_generic_reloc, "R_386_TLS_IE_32",
 115         TRUE, 0xffffffff, 0xffffffff, FALSE),
 116   HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 117         bfd_elf_generic_reloc, "R_386_TLS_LE_32",
 118         TRUE, 0xffffffff, 0xffffffff, FALSE),
 119   HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 120         bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
 121         TRUE, 0xffffffff, 0xffffffff, FALSE),
 122   HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 123         bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
 124         TRUE, 0xffffffff, 0xffffffff, FALSE),
 125   HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 126         bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
 127         TRUE, 0xffffffff, 0xffffffff, FALSE),
 128
 129   /* Another gap.  */
 130 #define R_386_tls (R_386_TLS_TPOFF32 + 1 - R_386_tls_offset)
 131 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
 132
 133 /* GNU extension to record C++ vtable hierarchy.  */
 134   HOWTO (R_386_GNU_VTINHERIT,   /* type */
 135          0,                     /* rightshift */
 136          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 137          0,                     /* bitsize */
 138          FALSE,                 /* pc_relative */
 139          0,                     /* bitpos */
 140          complain_overflow_dont, /* complain_on_overflow */
 141          NULL,                  /* special_function */
 142          "R_386_GNU_VTINHERIT", /* name */
 143          FALSE,                 /* partial_inplace */
 144          0,                     /* src_mask */
 145          0,                     /* dst_mask */
 146          FALSE),                /* pcrel_offset */
 147
 148 /* GNU extension to record C++ vtable member usage.  */
 149   HOWTO (R_386_GNU_VTENTRY,     /* type */
 150          0,                     /* rightshift */
 151          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 152          0,                     /* bitsize */
 153          FALSE,                 /* pc_relative */
 154          0,                     /* bitpos */
 155          complain_overflow_dont, /* complain_on_overflow */
 156          _bfd_elf_rel_vtable_reloc_fn, /* special_function */
 157          "R_386_GNU_VTENTRY",   /* name */
 158          FALSE,                 /* partial_inplace */
 159          0,                     /* src_mask */
 160          0,                     /* dst_mask */
 161          FALSE)                 /* pcrel_offset */
 162
 163 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
 164
 165 };
 166
 167 #ifdef DEBUG_GEN_RELOC
 168 #define TRACE(str) \
 169   fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
 170 #else
 171 #define TRACE(str)
 172 #endif
 173
 174 static reloc_howto_type *
 175 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 176                             bfd_reloc_code_real_type code)
 177 {
 178   switch (code)
 179     {
 180     case BFD_RELOC_NONE:
 181       TRACE ("BFD_RELOC_NONE");
 182       return &elf_howto_table[R_386_NONE];
 183
 184     case BFD_RELOC_32:
 185       TRACE ("BFD_RELOC_32");
 186       return &elf_howto_table[R_386_32];
 187
 188     case BFD_RELOC_CTOR:
 189       TRACE ("BFD_RELOC_CTOR");
 190       return &elf_howto_table[R_386_32];
 191
 192     case BFD_RELOC_32_PCREL:
 193       TRACE ("BFD_RELOC_PC32");
 194       return &elf_howto_table[R_386_PC32];
 195
 196     case BFD_RELOC_386_GOT32:
 197       TRACE ("BFD_RELOC_386_GOT32");
 198       return &elf_howto_table[R_386_GOT32];
 199
 200     case BFD_RELOC_386_PLT32:
 201       TRACE ("BFD_RELOC_386_PLT32");
 202       return &elf_howto_table[R_386_PLT32];
 203
 204     case BFD_RELOC_386_COPY:
 205       TRACE ("BFD_RELOC_386_COPY");
 206       return &elf_howto_table[R_386_COPY];
 207
 208     case BFD_RELOC_386_GLOB_DAT:
 209       TRACE ("BFD_RELOC_386_GLOB_DAT");
 210       return &elf_howto_table[R_386_GLOB_DAT];
 211
 212     case BFD_RELOC_386_JUMP_SLOT:
 213       TRACE ("BFD_RELOC_386_JUMP_SLOT");
 214       return &elf_howto_table[R_386_JUMP_SLOT];
 215
 216     case BFD_RELOC_386_RELATIVE:
 217       TRACE ("BFD_RELOC_386_RELATIVE");
 218       return &elf_howto_table[R_386_RELATIVE];
 219
 220     case BFD_RELOC_386_GOTOFF:
 221       TRACE ("BFD_RELOC_386_GOTOFF");
 222       return &elf_howto_table[R_386_GOTOFF];
 223
 224     case BFD_RELOC_386_GOTPC:
 225       TRACE ("BFD_RELOC_386_GOTPC");
 226       return &elf_howto_table[R_386_GOTPC];
 227
 228       /* These relocs are a GNU extension.  */
 229     case BFD_RELOC_386_TLS_TPOFF:
 230       TRACE ("BFD_RELOC_386_TLS_TPOFF");
 231       return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
 232
 233     case BFD_RELOC_386_TLS_IE:
 234       TRACE ("BFD_RELOC_386_TLS_IE");
 235       return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
 236
 237     case BFD_RELOC_386_TLS_GOTIE:
 238       TRACE ("BFD_RELOC_386_TLS_GOTIE");
 239       return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
 240
 241     case BFD_RELOC_386_TLS_LE:
 242       TRACE ("BFD_RELOC_386_TLS_LE");
 243       return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
 244
 245     case BFD_RELOC_386_TLS_GD:
 246       TRACE ("BFD_RELOC_386_TLS_GD");
 247       return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
 248
 249     case BFD_RELOC_386_TLS_LDM:
 250       TRACE ("BFD_RELOC_386_TLS_LDM");
 251       return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
 252
 253     case BFD_RELOC_16:
 254       TRACE ("BFD_RELOC_16");
 255       return &elf_howto_table[R_386_16 - R_386_ext_offset];
 256
 257     case BFD_RELOC_16_PCREL:
 258       TRACE ("BFD_RELOC_16_PCREL");
 259       return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
 260
 261     case BFD_RELOC_8:
 262       TRACE ("BFD_RELOC_8");
 263       return &elf_howto_table[R_386_8 - R_386_ext_offset];
 264
 265     case BFD_RELOC_8_PCREL:
 266       TRACE ("BFD_RELOC_8_PCREL");
 267       return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
 268
 269     /* Common with Sun TLS implementation.  */
 270     case BFD_RELOC_386_TLS_LDO_32:
 271       TRACE ("BFD_RELOC_386_TLS_LDO_32");
 272       return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
 273
 274     case BFD_RELOC_386_TLS_IE_32:
 275       TRACE ("BFD_RELOC_386_TLS_IE_32");
 276       return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
 277
 278     case BFD_RELOC_386_TLS_LE_32:
 279       TRACE ("BFD_RELOC_386_TLS_LE_32");
 280       return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
 281
 282     case BFD_RELOC_386_TLS_DTPMOD32:
 283       TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
 284       return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
 285
 286     case BFD_RELOC_386_TLS_DTPOFF32:
 287       TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
 288       return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
 289
 290     case BFD_RELOC_386_TLS_TPOFF32:
 291       TRACE ("BFD_RELOC_386_TLS_TPOFF32");
 292       return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
 293
 294     case BFD_RELOC_VTABLE_INHERIT:
 295       TRACE ("BFD_RELOC_VTABLE_INHERIT");
 296       return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
 297
 298     case BFD_RELOC_VTABLE_ENTRY:
 299       TRACE ("BFD_RELOC_VTABLE_ENTRY");
 300       return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
 301
 302     default:
 303       break;
 304     }
 305
 306   TRACE ("Unknown");
 307   return 0;
 308 }
 309
 310 static void
 311 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
 312                             arelent *cache_ptr,
 313                             Elf_Internal_Rela *dst)
 314 {
 315   unsigned int r_type = ELF32_R_TYPE (dst->r_info);
 316   unsigned int indx;
 317
 318   if ((indx = r_type) >= R_386_standard
 319       && ((indx = r_type - R_386_ext_offset) - R_386_standard
 320           >= R_386_ext - R_386_standard)
 321       && ((indx = r_type - R_386_tls_offset) - R_386_ext
 322           >= R_386_tls - R_386_ext)
 323       && ((indx = r_type - R_386_vt_offset) - R_386_tls
 324           >= R_386_vt - R_386_tls))
 325     {
 326       (*_bfd_error_handler) (_("%s: invalid relocation type %d"),
 327                              bfd_archive_filename (abfd), (int) r_type);
 328       indx = R_386_NONE;
 329     }
 330   cache_ptr->howto = &elf_howto_table[indx];
 331 }
 332
 333 /* Return whether a symbol name implies a local label.  The UnixWare
 334    2.1 cc generates temporary symbols that start with .X, so we
 335    recognize them here.  FIXME: do other SVR4 compilers also use .X?.
 336    If so, we should move the .X recognition into
 337    _bfd_elf_is_local_label_name.  */
 338
 339 static bfd_boolean
 340 elf_i386_is_local_label_name (bfd *abfd, const char *name)
 341 {
 342   if (name[0] == '.' && name[1] == 'X')
 343     return TRUE;
 344
 345   return _bfd_elf_is_local_label_name (abfd, name);
 346 }
 347 \f
 348 /* Support for core dump NOTE sections.  */
 349
 350 static bfd_boolean
 351 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
 352 {
 353   int offset;
 354   size_t raw_size;
 355
 356   if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
 357     {
 358       int pr_version = bfd_get_32 (abfd, note->descdata);
 359
 360       if (pr_version != 1)
 361         return FALSE;
 362
 363       /* pr_cursig */
 364       elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
 365
 366       /* pr_pid */
 367       elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
 368
 369       /* pr_reg */
 370       offset = 28;
 371       raw_size = bfd_get_32 (abfd, note->descdata + 8);
 372     }
 373   else
 374     {
 375       switch (note->descsz)
 376         {
 377         default:
 378           return FALSE;
 379
 380         case 144:               /* Linux/i386 */
 381           /* pr_cursig */
 382           elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
 383
 384           /* pr_pid */
 385           elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
 386
 387           /* pr_reg */
 388           offset = 72;
 389           raw_size = 68;
 390
 391           break;
 392         }
 393     }
 394
 395   /* Make a ".reg/999" section.  */
 396   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
 397                                           raw_size, note->descpos + offset);
 398 }
 399
 400 static bfd_boolean
 401 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
 402 {
 403   if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
 404     {
 405       int pr_version = bfd_get_32 (abfd, note->descdata);
 406
 407       if (pr_version != 1)
 408         return FALSE;
 409
 410       elf_tdata (abfd)->core_program
 411         = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
 412       elf_tdata (abfd)->core_command
 413         = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
 414     }
 415   else
 416     {
 417       switch (note->descsz)
 418         {
 419         default:
 420           return FALSE;
 421
 422         case 124:               /* Linux/i386 elf_prpsinfo.  */
 423           elf_tdata (abfd)->core_program
 424             = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
 425           elf_tdata (abfd)->core_command
 426             = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
 427         }
 428     }
 429
 430   /* Note that for some reason, a spurious space is tacked
 431      onto the end of the args in some (at least one anyway)
 432      implementations, so strip it off if it exists.  */
 433   {
 434     char *command = elf_tdata (abfd)->core_command;
 435     int n = strlen (command);
 436
 437     if (0 < n && command[n - 1] == ' ')
 438       command[n - 1] = '\0';
 439   }
 440
 441   return TRUE;
 442 }
 443 \f
 444 /* Functions for the i386 ELF linker.
 445
 446    In order to gain some understanding of code in this file without
 447    knowing all the intricate details of the linker, note the
 448    following:
 449
 450    Functions named elf_i386_* are called by external routines, other
 451    functions are only called locally.  elf_i386_* functions appear
 452    in this file more or less in the order in which they are called
 453    from external routines.  eg. elf_i386_check_relocs is called
 454    early in the link process, elf_i386_finish_dynamic_sections is
 455    one of the last functions.  */
 456
 457
 458 /* The name of the dynamic interpreter.  This is put in the .interp
 459    section.  */
 460
 461 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
 462
 463 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
 464    copying dynamic variables from a shared lib into an app's dynbss
 465    section, and instead use a dynamic relocation to point into the
 466    shared lib.  */
 467 #define ELIMINATE_COPY_RELOCS 1
 468
 469 /* The size in bytes of an entry in the procedure linkage table.  */
 470
 471 #define PLT_ENTRY_SIZE 16
 472
 473 /* The first entry in an absolute procedure linkage table looks like
 474    this.  See the SVR4 ABI i386 supplement to see how this works.  */
 475
 476 static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] =
 477 {
 478   0xff, 0x35,   /* pushl contents of address */
 479   0, 0, 0, 0,   /* replaced with address of .got + 4.  */
 480   0xff, 0x25,   /* jmp indirect */
 481   0, 0, 0, 0,   /* replaced with address of .got + 8.  */
 482   0, 0, 0, 0    /* pad out to 16 bytes.  */
 483 };
 484
 485 /* Subsequent entries in an absolute procedure linkage table look like
 486    this.  */
 487
 488 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
 489 {
 490   0xff, 0x25,   /* jmp indirect */
 491   0, 0, 0, 0,   /* replaced with address of this symbol in .got.  */
 492   0x68,         /* pushl immediate */
 493   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 494   0xe9,         /* jmp relative */
 495   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 496 };
 497
 498 /* The first entry in a PIC procedure linkage table look like this.  */
 499
 500 static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] =
 501 {
 502   0xff, 0xb3, 4, 0, 0, 0,       /* pushl 4(%ebx) */
 503   0xff, 0xa3, 8, 0, 0, 0,       /* jmp *8(%ebx) */
 504   0, 0, 0, 0                    /* pad out to 16 bytes.  */
 505 };
 506
 507 /* Subsequent entries in a PIC procedure linkage table look like this.  */
 508
 509 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
 510 {
 511   0xff, 0xa3,   /* jmp *offset(%ebx) */
 512   0, 0, 0, 0,   /* replaced with offset of this symbol in .got.  */
 513   0x68,         /* pushl immediate */
 514   0, 0, 0, 0,   /* replaced with offset into relocation table.  */
 515   0xe9,         /* jmp relative */
 516   0, 0, 0, 0    /* replaced with offset to start of .plt.  */
 517 };
 518
 519 /* The i386 linker needs to keep track of the number of relocs that it
 520    decides to copy as dynamic relocs in check_relocs for each symbol.
 521    This is so that it can later discard them if they are found to be
 522    unnecessary.  We store the information in a field extending the
 523    regular ELF linker hash table.  */
 524
 525 struct elf_i386_dyn_relocs
 526 {
 527   struct elf_i386_dyn_relocs *next;
 528
 529   /* The input section of the reloc.  */
 530   asection *sec;
 531
 532   /* Total number of relocs copied for the input section.  */
 533   bfd_size_type count;
 534
 535   /* Number of pc-relative relocs copied for the input section.  */
 536   bfd_size_type pc_count;
 537 };
 538
 539 /* i386 ELF linker hash entry.  */
 540
 541 struct elf_i386_link_hash_entry
 542 {
 543   struct elf_link_hash_entry elf;
 544
 545   /* Track dynamic relocs copied for this symbol.  */
 546   struct elf_i386_dyn_relocs *dyn_relocs;
 547
 548 #define GOT_UNKNOWN     0
 549 #define GOT_NORMAL      1
 550 #define GOT_TLS_GD      2
 551 #define GOT_TLS_IE      4
 552 #define GOT_TLS_IE_POS  5
 553 #define GOT_TLS_IE_NEG  6
 554 #define GOT_TLS_IE_BOTH 7
 555   unsigned char tls_type;
 556 };
 557
 558 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
 559
 560 struct elf_i386_obj_tdata
 561 {
 562   struct elf_obj_tdata root;
 563
 564   /* tls_type for each local got entry.  */
 565   char *local_got_tls_type;
 566 };
 567
 568 #define elf_i386_tdata(abfd) \
 569   ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
 570
 571 #define elf_i386_local_got_tls_type(abfd) \
 572   (elf_i386_tdata (abfd)->local_got_tls_type)
 573
 574 static bfd_boolean
 575 elf_i386_mkobject (bfd *abfd)
 576 {
 577   bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
 578   abfd->tdata.any = bfd_zalloc (abfd, amt);
 579   if (abfd->tdata.any == NULL)
 580     return FALSE;
 581   return TRUE;
 582 }
 583
 584 /* i386 ELF linker hash table.  */
 585
 586 struct elf_i386_link_hash_table
 587 {
 588   struct elf_link_hash_table elf;
 589
 590   /* Short-cuts to get to dynamic linker sections.  */
 591   asection *sgot;
 592   asection *sgotplt;
 593   asection *srelgot;
 594   asection *splt;
 595   asection *srelplt;
 596   asection *sdynbss;
 597   asection *srelbss;
 598
 599   union {
 600     bfd_signed_vma refcount;
 601     bfd_vma offset;
 602   } tls_ldm_got;
 603
 604   /* Small local sym to section mapping cache.  */
 605   struct sym_sec_cache sym_sec;
 606 };
 607
 608 /* Get the i386 ELF linker hash table from a link_info structure.  */
 609
 610 #define elf_i386_hash_table(p) \
 611   ((struct elf_i386_link_hash_table *) ((p)->hash))
 612
 613 /* Create an entry in an i386 ELF linker hash table.  */
 614
 615 static struct bfd_hash_entry *
 616 link_hash_newfunc (struct bfd_hash_entry *entry,
 617                    struct bfd_hash_table *table,
 618                    const char *string)
 619 {
 620   /* Allocate the structure if it has not already been allocated by a
 621      subclass.  */
 622   if (entry == NULL)
 623     {
 624       entry = bfd_hash_allocate (table,
 625                                  sizeof (struct elf_i386_link_hash_entry));
 626       if (entry == NULL)
 627         return entry;
 628     }
 629
 630   /* Call the allocation method of the superclass.  */
 631   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 632   if (entry != NULL)
 633     {
 634       struct elf_i386_link_hash_entry *eh;
 635
 636       eh = (struct elf_i386_link_hash_entry *) entry;
 637       eh->dyn_relocs = NULL;
 638       eh->tls_type = GOT_UNKNOWN;
 639     }
 640
 641   return entry;
 642 }
 643
 644 /* Create an i386 ELF linker hash table.  */
 645
 646 static struct bfd_link_hash_table *
 647 elf_i386_link_hash_table_create (bfd *abfd)
 648 {
 649   struct elf_i386_link_hash_table *ret;
 650   bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
 651
 652   ret = bfd_malloc (amt);
 653   if (ret == NULL)
 654     return NULL;
 655
 656   if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
 657     {
 658       free (ret);
 659       return NULL;
 660     }
 661
 662   ret->sgot = NULL;
 663   ret->sgotplt = NULL;
 664   ret->srelgot = NULL;
 665   ret->splt = NULL;
 666   ret->srelplt = NULL;
 667   ret->sdynbss = NULL;
 668   ret->srelbss = NULL;
 669   ret->tls_ldm_got.refcount = 0;
 670   ret->sym_sec.abfd = NULL;
 671
 672   return &ret->elf.root;
 673 }
 674
 675 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
 676    shortcuts to them in our hash table.  */
 677
 678 static bfd_boolean
 679 create_got_section (bfd *dynobj, struct bfd_link_info *info)
 680 {
 681   struct elf_i386_link_hash_table *htab;
 682
 683   if (! _bfd_elf_create_got_section (dynobj, info))
 684     return FALSE;
 685
 686   htab = elf_i386_hash_table (info);
 687   htab->sgot = bfd_get_section_by_name (dynobj, ".got");
 688   htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
 689   if (!htab->sgot || !htab->sgotplt)
 690     abort ();
 691
 692   htab->srelgot = bfd_make_section (dynobj, ".rel.got");
 693   if (htab->srelgot == NULL
 694       || ! bfd_set_section_flags (dynobj, htab->srelgot,
 695                                   (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
 696                                    | SEC_IN_MEMORY | SEC_LINKER_CREATED
 697                                    | SEC_READONLY))
 698       || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
 699     return FALSE;
 700   return TRUE;
 701 }
 702
 703 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
 704    .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
 705    hash table.  */
 706
 707 static bfd_boolean
 708 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
 709 {
 710   struct elf_i386_link_hash_table *htab;
 711
 712   htab = elf_i386_hash_table (info);
 713   if (!htab->sgot && !create_got_section (dynobj, info))
 714     return FALSE;
 715
 716   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 717     return FALSE;
 718
 719   htab->splt = bfd_get_section_by_name (dynobj, ".plt");
 720   htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
 721   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 722   if (!info->shared)
 723     htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
 724
 725   if (!htab->splt || !htab->srelplt || !htab->sdynbss
 726       || (!info->shared && !htab->srelbss))
 727     abort ();
 728
 729   return TRUE;
 730 }
 731
 732 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 733
 734 static void
 735 elf_i386_copy_indirect_symbol (const struct elf_backend_data *bed,
 736                                struct elf_link_hash_entry *dir,
 737                                struct elf_link_hash_entry *ind)
 738 {
 739   struct elf_i386_link_hash_entry *edir, *eind;
 740
 741   edir = (struct elf_i386_link_hash_entry *) dir;
 742   eind = (struct elf_i386_link_hash_entry *) ind;
 743
 744   if (eind->dyn_relocs != NULL)
 745     {
 746       if (edir->dyn_relocs != NULL)
 747         {
 748           struct elf_i386_dyn_relocs **pp;
 749           struct elf_i386_dyn_relocs *p;
 750
 751           if (ind->root.type == bfd_link_hash_indirect)
 752             abort ();
 753
 754           /* Add reloc counts against the weak sym to the strong sym
 755              list.  Merge any entries against the same section.  */
 756           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 757             {
 758               struct elf_i386_dyn_relocs *q;
 759
 760               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 761                 if (q->sec == p->sec)
 762                   {
 763                     q->pc_count += p->pc_count;
 764                     q->count += p->count;
 765                     *pp = p->next;
 766                     break;
 767                   }
 768               if (q == NULL)
 769                 pp = &p->next;
 770             }
 771           *pp = edir->dyn_relocs;
 772         }
 773
 774       edir->dyn_relocs = eind->dyn_relocs;
 775       eind->dyn_relocs = NULL;
 776     }
 777
 778   if (ind->root.type == bfd_link_hash_indirect
 779       && dir->got.refcount <= 0)
 780     {
 781       edir->tls_type = eind->tls_type;
 782       eind->tls_type = GOT_UNKNOWN;
 783     }
 784
 785   if (ELIMINATE_COPY_RELOCS
 786       && ind->root.type != bfd_link_hash_indirect
 787       && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
 788     /* If called to transfer flags for a weakdef during processing
 789        of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
 790        We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 791     dir->elf_link_hash_flags |=
 792       (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
 793                                    | ELF_LINK_HASH_REF_REGULAR
 794                                    | ELF_LINK_HASH_REF_REGULAR_NONWEAK
 795                                    | ELF_LINK_HASH_NEEDS_PLT
 796                                    | ELF_LINK_POINTER_EQUALITY_NEEDED));
 797   else
 798     _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
 799 }
 800
 801 static int
 802 elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
 803 {
 804   if (info->shared)
 805     return r_type;
 806
 807   switch (r_type)
 808     {
 809     case R_386_TLS_GD:
 810     case R_386_TLS_IE_32:
 811       if (is_local)
 812         return R_386_TLS_LE_32;
 813       return R_386_TLS_IE_32;
 814     case R_386_TLS_IE:
 815     case R_386_TLS_GOTIE:
 816       if (is_local)
 817         return R_386_TLS_LE_32;
 818       return r_type;
 819     case R_386_TLS_LDM:
 820       return R_386_TLS_LE_32;
 821     }
 822
 823   return r_type;
 824 }
 825
 826 /* Look through the relocs for a section during the first phase, and
 827    calculate needed space in the global offset table, procedure linkage
 828    table, and dynamic reloc sections.  */
 829
 830 static bfd_boolean
 831 elf_i386_check_relocs (bfd *abfd,
 832                        struct bfd_link_info *info,
 833                        asection *sec,
 834                        const Elf_Internal_Rela *relocs)
 835 {
 836   struct elf_i386_link_hash_table *htab;
 837   Elf_Internal_Shdr *symtab_hdr;
 838   struct elf_link_hash_entry **sym_hashes;
 839   const Elf_Internal_Rela *rel;
 840   const Elf_Internal_Rela *rel_end;
 841   asection *sreloc;
 842
 843   if (info->relocatable)
 844     return TRUE;
 845
 846   htab = elf_i386_hash_table (info);
 847   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
 848   sym_hashes = elf_sym_hashes (abfd);
 849
 850   sreloc = NULL;
 851
 852   rel_end = relocs + sec->reloc_count;
 853   for (rel = relocs; rel < rel_end; rel++)
 854     {
 855       unsigned int r_type;
 856       unsigned long r_symndx;
 857       struct elf_link_hash_entry *h;
 858
 859       r_symndx = ELF32_R_SYM (rel->r_info);
 860       r_type = ELF32_R_TYPE (rel->r_info);
 861
 862       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
 863         {
 864           (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
 865                                  bfd_archive_filename (abfd),
 866                                  r_symndx);
 867           return FALSE;
 868         }
 869
 870       if (r_symndx < symtab_hdr->sh_info)
 871         h = NULL;
 872       else
 873         h = sym_hashes[r_symndx - symtab_hdr->sh_info];
 874
 875       r_type = elf_i386_tls_transition (info, r_type, h == NULL);
 876
 877       switch (r_type)
 878         {
 879         case R_386_TLS_LDM:
 880           htab->tls_ldm_got.refcount += 1;
 881           goto create_got;
 882
 883         case R_386_PLT32:
 884           /* This symbol requires a procedure linkage table entry.  We
 885              actually build the entry in adjust_dynamic_symbol,
 886              because this might be a case of linking PIC code which is
 887              never referenced by a dynamic object, in which case we
 888              don't need to generate a procedure linkage table entry
 889              after all.  */
 890
 891           /* If this is a local symbol, we resolve it directly without
 892              creating a procedure linkage table entry.  */
 893           if (h == NULL)
 894             continue;
 895
 896           h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
 897           h->plt.refcount += 1;
 898           break;
 899
 900         case R_386_TLS_IE_32:
 901         case R_386_TLS_IE:
 902         case R_386_TLS_GOTIE:
 903           if (info->shared)
 904             info->flags |= DF_STATIC_TLS;
 905           /* Fall through */
 906
 907         case R_386_GOT32:
 908         case R_386_TLS_GD:
 909           /* This symbol requires a global offset table entry.  */
 910           {
 911             int tls_type, old_tls_type;
 912
 913             switch (r_type)
 914               {
 915               default:
 916               case R_386_GOT32: tls_type = GOT_NORMAL; break;
 917               case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
 918               case R_386_TLS_IE_32:
 919                 if (ELF32_R_TYPE (rel->r_info) == r_type)
 920                   tls_type = GOT_TLS_IE_NEG;
 921                 else
 922                   /* If this is a GD->IE transition, we may use either of
 923                      R_386_TLS_TPOFF and R_386_TLS_TPOFF32.  */
 924                   tls_type = GOT_TLS_IE;
 925                 break;
 926               case R_386_TLS_IE:
 927               case R_386_TLS_GOTIE:
 928                 tls_type = GOT_TLS_IE_POS; break;
 929               }
 930
 931             if (h != NULL)
 932               {
 933                 h->got.refcount += 1;
 934                 old_tls_type = elf_i386_hash_entry(h)->tls_type;
 935               }
 936             else
 937               {
 938                 bfd_signed_vma *local_got_refcounts;
 939
 940                 /* This is a global offset table entry for a local symbol.  */
 941                 local_got_refcounts = elf_local_got_refcounts (abfd);
 942                 if (local_got_refcounts == NULL)
 943                   {
 944                     bfd_size_type size;
 945
 946                     size = symtab_hdr->sh_info;
 947                     size *= (sizeof (bfd_signed_vma) + sizeof(char));
 948                     local_got_refcounts = bfd_zalloc (abfd, size);
 949                     if (local_got_refcounts == NULL)
 950                       return FALSE;
 951                     elf_local_got_refcounts (abfd) = local_got_refcounts;
 952                     elf_i386_local_got_tls_type (abfd)
 953                       = (char *) (local_got_refcounts + symtab_hdr->sh_info);
 954                   }
 955                 local_got_refcounts[r_symndx] += 1;
 956                 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
 957               }
 958
 959             if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
 960               tls_type |= old_tls_type;
 961             /* If a TLS symbol is accessed using IE at least once,
 962                there is no point to use dynamic model for it.  */
 963             else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
 964                      && (old_tls_type != GOT_TLS_GD
 965                          || (tls_type & GOT_TLS_IE) == 0))
 966               {
 967                 if ((old_tls_type & GOT_TLS_IE) && tls_type == GOT_TLS_GD)
 968                   tls_type = old_tls_type;
 969                 else
 970                   {
 971                     (*_bfd_error_handler)
 972                       (_("%s: `%s' accessed both as normal and "
 973                          "thread local symbol"),
 974                        bfd_archive_filename (abfd),
 975                        h ? h->root.root.string : "<local>");
 976                     return FALSE;
 977                   }
 978               }
 979
 980             if (old_tls_type != tls_type)
 981               {
 982                 if (h != NULL)
 983                   elf_i386_hash_entry (h)->tls_type = tls_type;
 984                 else
 985                   elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
 986               }
 987           }
 988           /* Fall through */
 989
 990         case R_386_GOTOFF:
 991         case R_386_GOTPC:
 992         create_got:
 993           if (htab->sgot == NULL)
 994             {
 995               if (htab->elf.dynobj == NULL)
 996                 htab->elf.dynobj = abfd;
 997               if (!create_got_section (htab->elf.dynobj, info))
 998                 return FALSE;
 999             }
1000           if (r_type != R_386_TLS_IE)
1001             break;
1002           /* Fall through */
1003
1004         case R_386_TLS_LE_32:
1005         case R_386_TLS_LE:
1006           if (!info->shared)
1007             break;
1008           info->flags |= DF_STATIC_TLS;
1009           /* Fall through */
1010
1011         case R_386_32:
1012         case R_386_PC32:
1013           if (h != NULL && !info->shared)
1014             {
1015               /* If this reloc is in a read-only section, we might
1016                  need a copy reloc.  We can't check reliably at this
1017                  stage whether the section is read-only, as input
1018                  sections have not yet been mapped to output sections.
1019                  Tentatively set the flag for now, and correct in
1020                  adjust_dynamic_symbol.  */
1021               h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1022
1023               /* We may need a .plt entry if the function this reloc
1024                  refers to is in a shared lib.  */
1025               h->plt.refcount += 1;
1026               if (r_type != R_386_PC32)
1027                 h->elf_link_hash_flags |= ELF_LINK_POINTER_EQUALITY_NEEDED;
1028             }
1029
1030           /* If we are creating a shared library, and this is a reloc
1031              against a global symbol, or a non PC relative reloc
1032              against a local symbol, then we need to copy the reloc
1033              into the shared library.  However, if we are linking with
1034              -Bsymbolic, we do not need to copy a reloc against a
1035              global symbol which is defined in an object we are
1036              including in the link (i.e., DEF_REGULAR is set).  At
1037              this point we have not seen all the input files, so it is
1038              possible that DEF_REGULAR is not set now but will be set
1039              later (it is never cleared).  In case of a weak definition,
1040              DEF_REGULAR may be cleared later by a strong definition in
1041              a shared library.  We account for that possibility below by
1042              storing information in the relocs_copied field of the hash
1043              table entry.  A similar situation occurs when creating
1044              shared libraries and symbol visibility changes render the
1045              symbol local.
1046
1047              If on the other hand, we are creating an executable, we
1048              may need to keep relocations for symbols satisfied by a
1049              dynamic library if we manage to avoid copy relocs for the
1050              symbol.  */
1051           if ((info->shared
1052                && (sec->flags & SEC_ALLOC) != 0
1053                && (r_type != R_386_PC32
1054                    || (h != NULL
1055                        && (! info->symbolic
1056                            || h->root.type == bfd_link_hash_defweak
1057                            || (h->elf_link_hash_flags
1058                                & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1059               || (ELIMINATE_COPY_RELOCS
1060                   && !info->shared
1061                   && (sec->flags & SEC_ALLOC) != 0
1062                   && h != NULL
1063                   && (h->root.type == bfd_link_hash_defweak
1064                       || (h->elf_link_hash_flags
1065                           & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1066             {
1067               struct elf_i386_dyn_relocs *p;
1068               struct elf_i386_dyn_relocs **head;
1069
1070               /* We must copy these reloc types into the output file.
1071                  Create a reloc section in dynobj and make room for
1072                  this reloc.  */
1073               if (sreloc == NULL)
1074                 {
1075                   const char *name;
1076                   bfd *dynobj;
1077                   unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1078                   unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
1079
1080                   name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1081                   if (name == NULL)
1082                     return FALSE;
1083
1084                   if (strncmp (name, ".rel", 4) != 0
1085                       || strcmp (bfd_get_section_name (abfd, sec),
1086                                  name + 4) != 0)
1087                     {
1088                       (*_bfd_error_handler)
1089                         (_("%s: bad relocation section name `%s\'"),
1090                          bfd_archive_filename (abfd), name);
1091                     }
1092
1093                   if (htab->elf.dynobj == NULL)
1094                     htab->elf.dynobj = abfd;
1095
1096                   dynobj = htab->elf.dynobj;
1097                   sreloc = bfd_get_section_by_name (dynobj, name);
1098                   if (sreloc == NULL)
1099                     {
1100                       flagword flags;
1101
1102                       sreloc = bfd_make_section (dynobj, name);
1103                       flags = (SEC_HAS_CONTENTS | SEC_READONLY
1104                                | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1105                       if ((sec->flags & SEC_ALLOC) != 0)
1106                         flags |= SEC_ALLOC | SEC_LOAD;
1107                       if (sreloc == NULL
1108                           || ! bfd_set_section_flags (dynobj, sreloc, flags)
1109                           || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1110                         return FALSE;
1111                     }
1112                   elf_section_data (sec)->sreloc = sreloc;
1113                 }
1114
1115               /* If this is a global symbol, we count the number of
1116                  relocations we need for this symbol.  */
1117               if (h != NULL)
1118                 {
1119                   head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1120                 }
1121               else
1122                 {
1123                   /* Track dynamic relocs needed for local syms too.
1124                      We really need local syms available to do this
1125                      easily.  Oh well.  */
1126
1127                   asection *s;
1128                   s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1129                                                  sec, r_symndx);
1130                   if (s == NULL)
1131                     return FALSE;
1132
1133                   head = ((struct elf_i386_dyn_relocs **)
1134                           &elf_section_data (s)->local_dynrel);
1135                 }
1136
1137               p = *head;
1138               if (p == NULL || p->sec != sec)
1139                 {
1140                   bfd_size_type amt = sizeof *p;
1141                   p = bfd_alloc (htab->elf.dynobj, amt);
1142                   if (p == NULL)
1143                     return FALSE;
1144                   p->next = *head;
1145                   *head = p;
1146                   p->sec = sec;
1147                   p->count = 0;
1148                   p->pc_count = 0;
1149                 }
1150
1151               p->count += 1;
1152               if (r_type == R_386_PC32)
1153                 p->pc_count += 1;
1154             }
1155           break;
1156
1157           /* This relocation describes the C++ object vtable hierarchy.
1158              Reconstruct it for later use during GC.  */
1159         case R_386_GNU_VTINHERIT:
1160           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1161             return FALSE;
1162           break;
1163
1164           /* This relocation describes which C++ vtable entries are actually
1165              used.  Record for later use during GC.  */
1166         case R_386_GNU_VTENTRY:
1167           if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1168             return FALSE;
1169           break;
1170
1171         default:
1172           break;
1173         }
1174     }
1175
1176   return TRUE;
1177 }
1178
1179 /* Return the section that should be marked against GC for a given
1180    relocation.  */
1181
1182 static asection *
1183 elf_i386_gc_mark_hook (asection *sec,
1184                        struct bfd_link_info *info ATTRIBUTE_UNUSED,
1185                        Elf_Internal_Rela *rel,
1186                        struct elf_link_hash_entry *h,
1187                        Elf_Internal_Sym *sym)
1188 {
1189   if (h != NULL)
1190     {
1191       switch (ELF32_R_TYPE (rel->r_info))
1192         {
1193         case R_386_GNU_VTINHERIT:
1194         case R_386_GNU_VTENTRY:
1195           break;
1196
1197         default:
1198           switch (h->root.type)
1199             {
1200             case bfd_link_hash_defined:
1201             case bfd_link_hash_defweak:
1202               return h->root.u.def.section;
1203
1204             case bfd_link_hash_common:
1205               return h->root.u.c.p->section;
1206
1207             default:
1208               break;
1209             }
1210         }
1211     }
1212   else
1213     return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1214
1215   return NULL;
1216 }
1217
1218 /* Update the got entry reference counts for the section being removed.  */
1219
1220 static bfd_boolean
1221 elf_i386_gc_sweep_hook (bfd *abfd,
1222                         struct bfd_link_info *info,
1223                         asection *sec,
1224                         const Elf_Internal_Rela *relocs)
1225 {
1226   Elf_Internal_Shdr *symtab_hdr;
1227   struct elf_link_hash_entry **sym_hashes;
1228   bfd_signed_vma *local_got_refcounts;
1229   const Elf_Internal_Rela *rel, *relend;
1230
1231   elf_section_data (sec)->local_dynrel = NULL;
1232
1233   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1234   sym_hashes = elf_sym_hashes (abfd);
1235   local_got_refcounts = elf_local_got_refcounts (abfd);
1236
1237   relend = relocs + sec->reloc_count;
1238   for (rel = relocs; rel < relend; rel++)
1239     {
1240       unsigned long r_symndx;
1241       unsigned int r_type;
1242       struct elf_link_hash_entry *h = NULL;
1243
1244       r_symndx = ELF32_R_SYM (rel->r_info);
1245       if (r_symndx >= symtab_hdr->sh_info)
1246         {
1247           struct elf_i386_link_hash_entry *eh;
1248           struct elf_i386_dyn_relocs **pp;
1249           struct elf_i386_dyn_relocs *p;
1250
1251           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1252           eh = (struct elf_i386_link_hash_entry *) h;
1253
1254           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1255             if (p->sec == sec)
1256               {
1257                 /* Everything must go for SEC.  */
1258                 *pp = p->next;
1259                 break;
1260               }
1261         }
1262
1263       r_type = ELF32_R_TYPE (rel->r_info);
1264       r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1265       switch (r_type)
1266         {
1267         case R_386_TLS_LDM:
1268           if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1269             elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1270           break;
1271
1272         case R_386_TLS_GD:
1273         case R_386_TLS_IE_32:
1274         case R_386_TLS_IE:
1275         case R_386_TLS_GOTIE:
1276         case R_386_GOT32:
1277           if (h != NULL)
1278             {
1279               if (h->got.refcount > 0)
1280                 h->got.refcount -= 1;
1281             }
1282           else if (local_got_refcounts != NULL)
1283             {
1284               if (local_got_refcounts[r_symndx] > 0)
1285                 local_got_refcounts[r_symndx] -= 1;
1286             }
1287           break;
1288
1289         case R_386_32:
1290         case R_386_PC32:
1291           if (info->shared)
1292             break;
1293           /* Fall through */
1294
1295         case R_386_PLT32:
1296           if (h != NULL)
1297             {
1298               if (h->plt.refcount > 0)
1299                 h->plt.refcount -= 1;
1300             }
1301           break;
1302
1303         default:
1304           break;
1305         }
1306     }
1307
1308   return TRUE;
1309 }
1310
1311 /* Adjust a symbol defined by a dynamic object and referenced by a
1312    regular object.  The current definition is in some section of the
1313    dynamic object, but we're not including those sections.  We have to
1314    change the definition to something the rest of the link can
1315    understand.  */
1316
1317 static bfd_boolean
1318 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1319                                 struct elf_link_hash_entry *h)
1320 {
1321   struct elf_i386_link_hash_table *htab;
1322   asection *s;
1323   unsigned int power_of_two;
1324
1325   /* If this is a function, put it in the procedure linkage table.  We
1326      will fill in the contents of the procedure linkage table later,
1327      when we know the address of the .got section.  */
1328   if (h->type == STT_FUNC
1329       || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1330     {
1331       if (h->plt.refcount <= 0
1332           || SYMBOL_CALLS_LOCAL (info, h)
1333           || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1334               && h->root.type == bfd_link_hash_undefweak))
1335         {
1336           /* This case can occur if we saw a PLT32 reloc in an input
1337              file, but the symbol was never referred to by a dynamic
1338              object, or if all references were garbage collected.  In
1339              such a case, we don't actually need to build a procedure
1340              linkage table, and we can just do a PC32 reloc instead.  */
1341           h->plt.offset = (bfd_vma) -1;
1342           h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1343         }
1344
1345       return TRUE;
1346     }
1347   else
1348     /* It's possible that we incorrectly decided a .plt reloc was
1349        needed for an R_386_PC32 reloc to a non-function sym in
1350        check_relocs.  We can't decide accurately between function and
1351        non-function syms in check-relocs;  Objects loaded later in
1352        the link may change h->type.  So fix it now.  */
1353     h->plt.offset = (bfd_vma) -1;
1354
1355   /* If this is a weak symbol, and there is a real definition, the
1356      processor independent code will have arranged for us to see the
1357      real definition first, and we can just use the same value.  */
1358   if (h->weakdef != NULL)
1359     {
1360       BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1361                   || h->weakdef->root.type == bfd_link_hash_defweak);
1362       h->root.u.def.section = h->weakdef->root.u.def.section;
1363       h->root.u.def.value = h->weakdef->root.u.def.value;
1364       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1365         h->elf_link_hash_flags
1366           = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1367              | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
1368       return TRUE;
1369     }
1370
1371   /* This is a reference to a symbol defined by a dynamic object which
1372      is not a function.  */
1373
1374   /* If we are creating a shared library, we must presume that the
1375      only references to the symbol are via the global offset table.
1376      For such cases we need not do anything here; the relocations will
1377      be handled correctly by relocate_section.  */
1378   if (info->shared)
1379     return TRUE;
1380
1381   /* If there are no references to this symbol that do not use the
1382      GOT, we don't need to generate a copy reloc.  */
1383   if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1384     return TRUE;
1385
1386   /* If -z nocopyreloc was given, we won't generate them either.  */
1387   if (info->nocopyreloc)
1388     {
1389       h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1390       return TRUE;
1391     }
1392
1393   if (ELIMINATE_COPY_RELOCS)
1394     {
1395       struct elf_i386_link_hash_entry * eh;
1396       struct elf_i386_dyn_relocs *p;
1397
1398       eh = (struct elf_i386_link_hash_entry *) h;
1399       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1400         {
1401           s = p->sec->output_section;
1402           if (s != NULL && (s->flags & SEC_READONLY) != 0)
1403             break;
1404         }
1405
1406       /* If we didn't find any dynamic relocs in read-only sections, then
1407          we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1408       if (p == NULL)
1409         {
1410           h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1411           return TRUE;
1412         }
1413     }
1414
1415   /* We must allocate the symbol in our .dynbss section, which will
1416      become part of the .bss section of the executable.  There will be
1417      an entry for this symbol in the .dynsym section.  The dynamic
1418      object will contain position independent code, so all references
1419      from the dynamic object to this symbol will go through the global
1420      offset table.  The dynamic linker will use the .dynsym entry to
1421      determine the address it must put in the global offset table, so
1422      both the dynamic object and the regular object will refer to the
1423      same memory location for the variable.  */
1424
1425   htab = elf_i386_hash_table (info);
1426
1427   /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1428      copy the initial value out of the dynamic object and into the
1429      runtime process image.  */
1430   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1431     {
1432       htab->srelbss->_raw_size += sizeof (Elf32_External_Rel);
1433       h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1434     }
1435
1436   /* We need to figure out the alignment required for this symbol.  I
1437      have no idea how ELF linkers handle this.  */
1438   power_of_two = bfd_log2 (h->size);
1439   if (power_of_two > 3)
1440     power_of_two = 3;
1441
1442   /* Apply the required alignment.  */
1443   s = htab->sdynbss;
1444   s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1445   if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1446     {
1447       if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1448         return FALSE;
1449     }
1450
1451   /* Define the symbol as being at this point in the section.  */
1452   h->root.u.def.section = s;
1453   h->root.u.def.value = s->_raw_size;
1454
1455   /* Increment the section size to make room for the symbol.  */
1456   s->_raw_size += h->size;
1457
1458   return TRUE;
1459 }
1460
1461 /* Allocate space in .plt, .got and associated reloc sections for
1462    dynamic relocs.  */
1463
1464 static bfd_boolean
1465 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1466 {
1467   struct bfd_link_info *info;
1468   struct elf_i386_link_hash_table *htab;
1469   struct elf_i386_link_hash_entry *eh;
1470   struct elf_i386_dyn_relocs *p;
1471
1472   if (h->root.type == bfd_link_hash_indirect)
1473     return TRUE;
1474
1475   if (h->root.type == bfd_link_hash_warning)
1476     /* When warning symbols are created, they **replace** the "real"
1477        entry in the hash table, thus we never get to see the real
1478        symbol in a hash traversal.  So look at it now.  */
1479     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1480
1481   info = (struct bfd_link_info *) inf;
1482   htab = elf_i386_hash_table (info);
1483
1484   if (htab->elf.dynamic_sections_created
1485       && h->plt.refcount > 0)
1486     {
1487       /* Make sure this symbol is output as a dynamic symbol.
1488          Undefined weak syms won't yet be marked as dynamic.  */
1489       if (h->dynindx == -1
1490           && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1491         {
1492           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1493             return FALSE;
1494         }
1495
1496       if (info->shared
1497           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1498         {
1499           asection *s = htab->splt;
1500
1501           /* If this is the first .plt entry, make room for the special
1502              first entry.  */
1503           if (s->_raw_size == 0)
1504             s->_raw_size += PLT_ENTRY_SIZE;
1505
1506           h->plt.offset = s->_raw_size;
1507
1508           /* If this symbol is not defined in a regular file, and we are
1509              not generating a shared library, then set the symbol to this
1510              location in the .plt.  This is required to make function
1511              pointers compare as equal between the normal executable and
1512              the shared library.  */
1513           if (! info->shared
1514               && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1515             {
1516               h->root.u.def.section = s;
1517               h->root.u.def.value = h->plt.offset;
1518             }
1519
1520           /* Make room for this entry.  */
1521           s->_raw_size += PLT_ENTRY_SIZE;
1522
1523           /* We also need to make an entry in the .got.plt section, which
1524              will be placed in the .got section by the linker script.  */
1525           htab->sgotplt->_raw_size += 4;
1526
1527           /* We also need to make an entry in the .rel.plt section.  */
1528           htab->srelplt->_raw_size += sizeof (Elf32_External_Rel);
1529         }
1530       else
1531         {
1532           h->plt.offset = (bfd_vma) -1;
1533           h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1534         }
1535     }
1536   else
1537     {
1538       h->plt.offset = (bfd_vma) -1;
1539       h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1540     }
1541
1542   /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1543      make it a R_386_TLS_LE_32 requiring no TLS entry.  */
1544   if (h->got.refcount > 0
1545       && !info->shared
1546       && h->dynindx == -1
1547       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
1548     h->got.offset = (bfd_vma) -1;
1549   else if (h->got.refcount > 0)
1550     {
1551       asection *s;
1552       bfd_boolean dyn;
1553       int tls_type = elf_i386_hash_entry(h)->tls_type;
1554
1555       /* Make sure this symbol is output as a dynamic symbol.
1556          Undefined weak syms won't yet be marked as dynamic.  */
1557       if (h->dynindx == -1
1558           && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1559         {
1560           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1561             return FALSE;
1562         }
1563
1564       s = htab->sgot;
1565       h->got.offset = s->_raw_size;
1566       s->_raw_size += 4;
1567       /* R_386_TLS_GD needs 2 consecutive GOT slots.  */
1568       if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE_BOTH)
1569         s->_raw_size += 4;
1570       dyn = htab->elf.dynamic_sections_created;
1571       /* R_386_TLS_IE_32 needs one dynamic relocation,
1572          R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1573          (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1574          need two), R_386_TLS_GD needs one if local symbol and two if
1575          global.  */
1576       if (tls_type == GOT_TLS_IE_BOTH)
1577         htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rel);
1578       else if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1579                || (tls_type & GOT_TLS_IE))
1580         htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1581       else if (tls_type == GOT_TLS_GD)
1582         htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rel);
1583       else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1584                 || h->root.type != bfd_link_hash_undefweak)
1585                && (info->shared
1586                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1587         htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1588     }
1589   else
1590     h->got.offset = (bfd_vma) -1;
1591
1592   eh = (struct elf_i386_link_hash_entry *) h;
1593   if (eh->dyn_relocs == NULL)
1594     return TRUE;
1595
1596   /* In the shared -Bsymbolic case, discard space allocated for
1597      dynamic pc-relative relocs against symbols which turn out to be
1598      defined in regular objects.  For the normal shared case, discard
1599      space for pc-relative relocs that have become local due to symbol
1600      visibility changes.  */
1601
1602   if (info->shared)
1603     {
1604       /* The only reloc that uses pc_count is R_386_PC32, which will
1605          appear on a call or on something like ".long foo - .".  We
1606          want calls to protected symbols to resolve directly to the
1607          function rather than going via the plt.  If people want
1608          function pointer comparisons to work as expected then they
1609          should avoid writing assembly like ".long foo - .".  */
1610       if (SYMBOL_CALLS_LOCAL (info, h))
1611         {
1612           struct elf_i386_dyn_relocs **pp;
1613
1614           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1615             {
1616               p->count -= p->pc_count;
1617               p->pc_count = 0;
1618               if (p->count == 0)
1619                 *pp = p->next;
1620               else
1621                 pp = &p->next;
1622             }
1623         }
1624
1625       /* Also discard relocs on undefined weak syms with non-default
1626          visibility.  */
1627       if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1628           && h->root.type == bfd_link_hash_undefweak)
1629         eh->dyn_relocs = NULL;
1630     }
1631   else if (ELIMINATE_COPY_RELOCS)
1632     {
1633       /* For the non-shared case, discard space for relocs against
1634          symbols which turn out to need copy relocs or are not
1635          dynamic.  */
1636
1637       if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1638           && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1639                && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1640               || (htab->elf.dynamic_sections_created
1641                   && (h->root.type == bfd_link_hash_undefweak
1642                       || h->root.type == bfd_link_hash_undefined))))
1643         {
1644           /* Make sure this symbol is output as a dynamic symbol.
1645              Undefined weak syms won't yet be marked as dynamic.  */
1646           if (h->dynindx == -1
1647               && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1648             {
1649               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1650                 return FALSE;
1651             }
1652
1653           /* If that succeeded, we know we'll be keeping all the
1654              relocs.  */
1655           if (h->dynindx != -1)
1656             goto keep;
1657         }
1658
1659       eh->dyn_relocs = NULL;
1660
1661     keep: ;
1662     }
1663
1664   /* Finally, allocate space.  */
1665   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1666     {
1667       asection *sreloc = elf_section_data (p->sec)->sreloc;
1668       sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel);
1669     }
1670
1671   return TRUE;
1672 }
1673
1674 /* Find any dynamic relocs that apply to read-only sections.  */
1675
1676 static bfd_boolean
1677 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1678 {
1679   struct elf_i386_link_hash_entry *eh;
1680   struct elf_i386_dyn_relocs *p;
1681
1682   if (h->root.type == bfd_link_hash_warning)
1683     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1684
1685   eh = (struct elf_i386_link_hash_entry *) h;
1686   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1687     {
1688       asection *s = p->sec->output_section;
1689
1690       if (s != NULL && (s->flags & SEC_READONLY) != 0)
1691         {
1692           struct bfd_link_info *info = (struct bfd_link_info *) inf;
1693
1694           info->flags |= DF_TEXTREL;
1695
1696           /* Not an error, just cut short the traversal.  */
1697           return FALSE;
1698         }
1699     }
1700   return TRUE;
1701 }
1702
1703 /* Set the sizes of the dynamic sections.  */
1704
1705 static bfd_boolean
1706 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1707                                 struct bfd_link_info *info)
1708 {
1709   struct elf_i386_link_hash_table *htab;
1710   bfd *dynobj;
1711   asection *s;
1712   bfd_boolean relocs;
1713   bfd *ibfd;
1714
1715   htab = elf_i386_hash_table (info);
1716   dynobj = htab->elf.dynobj;
1717   if (dynobj == NULL)
1718     abort ();
1719
1720   if (htab->elf.dynamic_sections_created)
1721     {
1722       /* Set the contents of the .interp section to the interpreter.  */
1723       if (info->executable)
1724         {
1725           s = bfd_get_section_by_name (dynobj, ".interp");
1726           if (s == NULL)
1727             abort ();
1728           s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1729           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1730         }
1731     }
1732
1733   /* Set up .got offsets for local syms, and space for local dynamic
1734      relocs.  */
1735   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1736     {
1737       bfd_signed_vma *local_got;
1738       bfd_signed_vma *end_local_got;
1739       char *local_tls_type;
1740       bfd_size_type locsymcount;
1741       Elf_Internal_Shdr *symtab_hdr;
1742       asection *srel;
1743
1744       if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1745         continue;
1746
1747       for (s = ibfd->sections; s != NULL; s = s->next)
1748         {
1749           struct elf_i386_dyn_relocs *p;
1750
1751           for (p = *((struct elf_i386_dyn_relocs **)
1752                      &elf_section_data (s)->local_dynrel);
1753                p != NULL;
1754                p = p->next)
1755             {
1756               if (!bfd_is_abs_section (p->sec)
1757                   && bfd_is_abs_section (p->sec->output_section))
1758                 {
1759                   /* Input section has been discarded, either because
1760                      it is a copy of a linkonce section or due to
1761                      linker script /DISCARD/, so we'll be discarding
1762                      the relocs too.  */
1763                 }
1764               else if (p->count != 0)
1765                 {
1766                   srel = elf_section_data (p->sec)->sreloc;
1767                   srel->_raw_size += p->count * sizeof (Elf32_External_Rel);
1768                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1769                     info->flags |= DF_TEXTREL;
1770                 }
1771             }
1772         }
1773
1774       local_got = elf_local_got_refcounts (ibfd);
1775       if (!local_got)
1776         continue;
1777
1778       symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1779       locsymcount = symtab_hdr->sh_info;
1780       end_local_got = local_got + locsymcount;
1781       local_tls_type = elf_i386_local_got_tls_type (ibfd);
1782       s = htab->sgot;
1783       srel = htab->srelgot;
1784       for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1785         {
1786           if (*local_got > 0)
1787             {
1788               *local_got = s->_raw_size;
1789               s->_raw_size += 4;
1790               if (*local_tls_type == GOT_TLS_GD
1791                   || *local_tls_type == GOT_TLS_IE_BOTH)
1792                 s->_raw_size += 4;
1793               if (info->shared
1794                   || *local_tls_type == GOT_TLS_GD
1795                   || (*local_tls_type & GOT_TLS_IE))
1796                 {
1797                   if (*local_tls_type == GOT_TLS_IE_BOTH)
1798                     srel->_raw_size += 2 * sizeof (Elf32_External_Rel);
1799                   else
1800                     srel->_raw_size += sizeof (Elf32_External_Rel);
1801                 }
1802             }
1803           else
1804             *local_got = (bfd_vma) -1;
1805         }
1806     }
1807
1808   if (htab->tls_ldm_got.refcount > 0)
1809     {
1810       /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1811          relocs.  */
1812       htab->tls_ldm_got.offset = htab->sgot->_raw_size;
1813       htab->sgot->_raw_size += 8;
1814       htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1815     }
1816   else
1817     htab->tls_ldm_got.offset = -1;
1818
1819   /* Allocate global sym .plt and .got entries, and space for global
1820      sym dynamic relocs.  */
1821   elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1822
1823   /* We now have determined the sizes of the various dynamic sections.
1824      Allocate memory for them.  */
1825   relocs = FALSE;
1826   for (s = dynobj->sections; s != NULL; s = s->next)
1827     {
1828       if ((s->flags & SEC_LINKER_CREATED) == 0)
1829         continue;
1830
1831       if (s == htab->splt
1832           || s == htab->sgot
1833           || s == htab->sgotplt)
1834         {
1835           /* Strip this section if we don't need it; see the
1836              comment below.  */
1837         }
1838       else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
1839         {
1840           if (s->_raw_size != 0 && s != htab->srelplt)
1841             relocs = TRUE;
1842
1843           /* We use the reloc_count field as a counter if we need
1844              to copy relocs into the output file.  */
1845           s->reloc_count = 0;
1846         }
1847       else
1848         {
1849           /* It's not one of our sections, so don't allocate space.  */
1850           continue;
1851         }
1852
1853       if (s->_raw_size == 0)
1854         {
1855           /* If we don't need this section, strip it from the
1856              output file.  This is mostly to handle .rel.bss and
1857              .rel.plt.  We must create both sections in
1858              create_dynamic_sections, because they must be created
1859              before the linker maps input sections to output
1860              sections.  The linker does that before
1861              adjust_dynamic_symbol is called, and it is that
1862              function which decides whether anything needs to go
1863              into these sections.  */
1864
1865           _bfd_strip_section_from_output (info, s);
1866           continue;
1867         }
1868
1869       /* Allocate memory for the section contents.  We use bfd_zalloc
1870          here in case unused entries are not reclaimed before the
1871          section's contents are written out.  This should not happen,
1872          but this way if it does, we get a R_386_NONE reloc instead
1873          of garbage.  */
1874       s->contents = bfd_zalloc (dynobj, s->_raw_size);
1875       if (s->contents == NULL)
1876         return FALSE;
1877     }
1878
1879   if (htab->elf.dynamic_sections_created)
1880     {
1881       /* Add some entries to the .dynamic section.  We fill in the
1882          values later, in elf_i386_finish_dynamic_sections, but we
1883          must add the entries now so that we get the correct size for
1884          the .dynamic section.  The DT_DEBUG entry is filled in by the
1885          dynamic linker and used by the debugger.  */
1886 #define add_dynamic_entry(TAG, VAL) \
1887   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1888
1889       if (info->executable)
1890         {
1891           if (!add_dynamic_entry (DT_DEBUG, 0))
1892             return FALSE;
1893         }
1894
1895       if (htab->splt->_raw_size != 0)
1896         {
1897           if (!add_dynamic_entry (DT_PLTGOT, 0)
1898               || !add_dynamic_entry (DT_PLTRELSZ, 0)
1899               || !add_dynamic_entry (DT_PLTREL, DT_REL)
1900               || !add_dynamic_entry (DT_JMPREL, 0))
1901             return FALSE;
1902         }
1903
1904       if (relocs)
1905         {
1906           if (!add_dynamic_entry (DT_REL, 0)
1907               || !add_dynamic_entry (DT_RELSZ, 0)
1908               || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
1909             return FALSE;
1910
1911           /* If any dynamic relocs apply to a read-only section,
1912              then we need a DT_TEXTREL entry.  */
1913           if ((info->flags & DF_TEXTREL) == 0)
1914             elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1915                                     (PTR) info);
1916
1917           if ((info->flags & DF_TEXTREL) != 0)
1918             {
1919               if (!add_dynamic_entry (DT_TEXTREL, 0))
1920                 return FALSE;
1921             }
1922         }
1923     }
1924 #undef add_dynamic_entry
1925
1926   return TRUE;
1927 }
1928
1929 /* Set the correct type for an x86 ELF section.  We do this by the
1930    section name, which is a hack, but ought to work.  */
1931
1932 static bfd_boolean
1933 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1934                         Elf_Internal_Shdr *hdr,
1935                         asection *sec)
1936 {
1937   register const char *name;
1938
1939   name = bfd_get_section_name (abfd, sec);
1940
1941   /* This is an ugly, but unfortunately necessary hack that is
1942      needed when producing EFI binaries on x86. It tells
1943      elf.c:elf_fake_sections() not to consider ".reloc" as a section
1944      containing ELF relocation info.  We need this hack in order to
1945      be able to generate ELF binaries that can be translated into
1946      EFI applications (which are essentially COFF objects).  Those
1947      files contain a COFF ".reloc" section inside an ELFNN object,
1948      which would normally cause BFD to segfault because it would
1949      attempt to interpret this section as containing relocation
1950      entries for section "oc".  With this hack enabled, ".reloc"
1951      will be treated as a normal data section, which will avoid the
1952      segfault.  However, you won't be able to create an ELFNN binary
1953      with a section named "oc" that needs relocations, but that's
1954      the kind of ugly side-effects you get when detecting section
1955      types based on their names...  In practice, this limitation is
1956      unlikely to bite.  */
1957   if (strcmp (name, ".reloc") == 0)
1958     hdr->sh_type = SHT_PROGBITS;
1959
1960   return TRUE;
1961 }
1962
1963 /* Return the base VMA address which should be subtracted from real addresses
1964    when resolving @dtpoff relocation.
1965    This is PT_TLS segment p_vaddr.  */
1966
1967 static bfd_vma
1968 dtpoff_base (struct bfd_link_info *info)
1969 {
1970   /* If tls_sec is NULL, we should have signalled an error already.  */
1971   if (elf_hash_table (info)->tls_sec == NULL)
1972     return 0;
1973   return elf_hash_table (info)->tls_sec->vma;
1974 }
1975
1976 /* Return the relocation value for @tpoff relocation
1977    if STT_TLS virtual address is ADDRESS.  */
1978
1979 static bfd_vma
1980 tpoff (struct bfd_link_info *info, bfd_vma address)
1981 {
1982   struct elf_link_hash_table *htab = elf_hash_table (info);
1983
1984   /* If tls_sec is NULL, we should have signalled an error already.  */
1985   if (htab->tls_sec == NULL)
1986     return 0;
1987   return htab->tls_size + htab->tls_sec->vma - address;
1988 }
1989
1990 /* Relocate an i386 ELF section.  */
1991
1992 static bfd_boolean
1993 elf_i386_relocate_section (bfd *output_bfd,
1994                            struct bfd_link_info *info,
1995                            bfd *input_bfd,
1996                            asection *input_section,
1997                            bfd_byte *contents,
1998                            Elf_Internal_Rela *relocs,
1999                            Elf_Internal_Sym *local_syms,
2000                            asection **local_sections)
2001 {
2002   struct elf_i386_link_hash_table *htab;
2003   Elf_Internal_Shdr *symtab_hdr;
2004   struct elf_link_hash_entry **sym_hashes;
2005   bfd_vma *local_got_offsets;
2006   Elf_Internal_Rela *rel;
2007   Elf_Internal_Rela *relend;
2008
2009   htab = elf_i386_hash_table (info);
2010   symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2011   sym_hashes = elf_sym_hashes (input_bfd);
2012   local_got_offsets = elf_local_got_offsets (input_bfd);
2013
2014   rel = relocs;
2015   relend = relocs + input_section->reloc_count;
2016   for (; rel < relend; rel++)
2017     {
2018       unsigned int r_type;
2019       reloc_howto_type *howto;
2020       unsigned long r_symndx;
2021       struct elf_link_hash_entry *h;
2022       Elf_Internal_Sym *sym;
2023       asection *sec;
2024       bfd_vma off;
2025       bfd_vma relocation;
2026       bfd_boolean unresolved_reloc;
2027       bfd_reloc_status_type r;
2028       unsigned int indx;
2029       int tls_type;
2030
2031       r_type = ELF32_R_TYPE (rel->r_info);
2032       if (r_type == R_386_GNU_VTINHERIT
2033           || r_type == R_386_GNU_VTENTRY)
2034         continue;
2035
2036       if ((indx = r_type) >= R_386_standard
2037           && ((indx = r_type - R_386_ext_offset) - R_386_standard
2038               >= R_386_ext - R_386_standard)
2039           && ((indx = r_type - R_386_tls_offset) - R_386_ext
2040               >= R_386_tls - R_386_ext))
2041         {
2042           bfd_set_error (bfd_error_bad_value);
2043           return FALSE;
2044         }
2045       howto = elf_howto_table + indx;
2046
2047       r_symndx = ELF32_R_SYM (rel->r_info);
2048
2049       if (info->relocatable)
2050         {
2051           bfd_vma val;
2052           bfd_byte *where;
2053
2054           /* This is a relocatable link.  We don't have to change
2055              anything, unless the reloc is against a section symbol,
2056              in which case we have to adjust according to where the
2057              section symbol winds up in the output section.  */
2058           if (r_symndx >= symtab_hdr->sh_info)
2059             continue;
2060
2061           sym = local_syms + r_symndx;
2062           if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2063             continue;
2064
2065           sec = local_sections[r_symndx];
2066           val = sec->output_offset;
2067           if (val == 0)
2068             continue;
2069
2070           where = contents + rel->r_offset;
2071           switch (howto->size)
2072             {
2073               /* FIXME: overflow checks.  */
2074             case 0:
2075               val += bfd_get_8 (input_bfd, where);
2076               bfd_put_8 (input_bfd, val, where);
2077               break;
2078             case 1:
2079               val += bfd_get_16 (input_bfd, where);
2080               bfd_put_16 (input_bfd, val, where);
2081               break;
2082             case 2:
2083               val += bfd_get_32 (input_bfd, where);
2084               bfd_put_32 (input_bfd, val, where);
2085               break;
2086             default:
2087               abort ();
2088             }
2089           continue;
2090         }
2091
2092       /* This is a final link.  */
2093       h = NULL;
2094       sym = NULL;
2095       sec = NULL;
2096       unresolved_reloc = FALSE;
2097       if (r_symndx < symtab_hdr->sh_info)
2098         {
2099           sym = local_syms + r_symndx;
2100           sec = local_sections[r_symndx];
2101           relocation = (sec->output_section->vma
2102                         + sec->output_offset
2103                         + sym->st_value);
2104           if ((sec->flags & SEC_MERGE)
2105               && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2106             {
2107               asection *msec;
2108               bfd_vma addend;
2109               bfd_byte *where = contents + rel->r_offset;
2110
2111               switch (howto->size)
2112                 {
2113                 case 0:
2114                   addend = bfd_get_8 (input_bfd, where);
2115                   if (howto->pc_relative)
2116                     {
2117                       addend = (addend ^ 0x80) - 0x80;
2118                       addend += 1;
2119                     }
2120                   break;
2121                 case 1:
2122                   addend = bfd_get_16 (input_bfd, where);
2123                   if (howto->pc_relative)
2124                     {
2125                       addend = (addend ^ 0x8000) - 0x8000;
2126                       addend += 2;
2127                     }
2128                   break;
2129                 case 2:
2130                   addend = bfd_get_32 (input_bfd, where);
2131                   if (howto->pc_relative)
2132                     {
2133                       addend = (addend ^ 0x80000000) - 0x80000000;
2134                       addend += 4;
2135                     }
2136                   break;
2137                 default:
2138                   abort ();
2139                 }
2140
2141               msec = sec;
2142               addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2143               addend -= relocation;
2144               addend += msec->output_section->vma + msec->output_offset;
2145
2146               switch (howto->size)
2147                 {
2148                 case 0:
2149                   /* FIXME: overflow checks.  */
2150                   if (howto->pc_relative)
2151                     addend -= 1;
2152                   bfd_put_8 (input_bfd, addend, where);
2153                   break;
2154                 case 1:
2155                   if (howto->pc_relative)
2156                     addend -= 2;
2157                   bfd_put_16 (input_bfd, addend, where);
2158                   break;
2159                 case 2:
2160                   if (howto->pc_relative)
2161                     addend -= 4;
2162                   bfd_put_32 (input_bfd, addend, where);
2163                   break;
2164                 }
2165             }
2166         }
2167       else
2168         {
2169           bfd_boolean warned;
2170
2171           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2172                                    r_symndx, symtab_hdr, sym_hashes,
2173                                    h, sec, relocation,
2174                                    unresolved_reloc, warned);
2175         }
2176
2177       switch (r_type)
2178         {
2179         case R_386_GOT32:
2180           /* Relocation is to the entry for this symbol in the global
2181              offset table.  */
2182           if (htab->sgot == NULL)
2183             abort ();
2184
2185           if (h != NULL)
2186             {
2187               bfd_boolean dyn;
2188
2189               off = h->got.offset;
2190               dyn = htab->elf.dynamic_sections_created;
2191               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2192                   || (info->shared
2193                       && SYMBOL_REFERENCES_LOCAL (info, h))
2194                   || (ELF_ST_VISIBILITY (h->other)
2195                       && h->root.type == bfd_link_hash_undefweak))
2196                 {
2197                   /* This is actually a static link, or it is a
2198                      -Bsymbolic link and the symbol is defined
2199                      locally, or the symbol was forced to be local
2200                      because of a version file.  We must initialize
2201                      this entry in the global offset table.  Since the
2202                      offset must always be a multiple of 4, we use the
2203                      least significant bit to record whether we have
2204                      initialized it already.
2205
2206                      When doing a dynamic link, we create a .rel.got
2207                      relocation entry to initialize the value.  This
2208                      is done in the finish_dynamic_symbol routine.  */
2209                   if ((off & 1) != 0)
2210                     off &= ~1;
2211                   else
2212                     {
2213                       bfd_put_32 (output_bfd, relocation,
2214                                   htab->sgot->contents + off);
2215                       h->got.offset |= 1;
2216                     }
2217                 }
2218               else
2219                 unresolved_reloc = FALSE;
2220             }
2221           else
2222             {
2223               if (local_got_offsets == NULL)
2224                 abort ();
2225
2226               off = local_got_offsets[r_symndx];
2227
2228               /* The offset must always be a multiple of 4.  We use
2229                  the least significant bit to record whether we have
2230                  already generated the necessary reloc.  */
2231               if ((off & 1) != 0)
2232                 off &= ~1;
2233               else
2234                 {
2235                   bfd_put_32 (output_bfd, relocation,
2236                               htab->sgot->contents + off);
2237
2238                   if (info->shared)
2239                     {
2240                       asection *s;
2241                       Elf_Internal_Rela outrel;
2242                       bfd_byte *loc;
2243
2244                       s = htab->srelgot;
2245                       if (s == NULL)
2246                         abort ();
2247
2248                       outrel.r_offset = (htab->sgot->output_section->vma
2249                                          + htab->sgot->output_offset
2250                                          + off);
2251                       outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2252                       loc = s->contents;
2253                       loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
2254                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2255                     }
2256
2257                   local_got_offsets[r_symndx] |= 1;
2258                 }
2259             }
2260
2261           if (off >= (bfd_vma) -2)
2262             abort ();
2263
2264           relocation = htab->sgot->output_section->vma
2265                        + htab->sgot->output_offset + off
2266                        - htab->sgotplt->output_section->vma
2267                        - htab->sgotplt->output_offset;
2268           break;
2269
2270         case R_386_GOTOFF:
2271           /* Relocation is relative to the start of the global offset
2272              table.  */
2273
2274           /* Note that sgot is not involved in this
2275              calculation.  We always want the start of .got.plt.  If we
2276              defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2277              permitted by the ABI, we might have to change this
2278              calculation.  */
2279           relocation -= htab->sgotplt->output_section->vma
2280                         + htab->sgotplt->output_offset;
2281           break;
2282
2283         case R_386_GOTPC:
2284           /* Use global offset table as symbol value.  */
2285           relocation = htab->sgotplt->output_section->vma
2286                        + htab->sgotplt->output_offset;
2287           unresolved_reloc = FALSE;
2288           break;
2289
2290         case R_386_PLT32:
2291           /* Relocation is to the entry for this symbol in the
2292              procedure linkage table.  */
2293
2294           /* Resolve a PLT32 reloc against a local symbol directly,
2295              without using the procedure linkage table.  */
2296           if (h == NULL)
2297             break;
2298
2299           if (h->plt.offset == (bfd_vma) -1
2300               || htab->splt == NULL)
2301             {
2302               /* We didn't make a PLT entry for this symbol.  This
2303                  happens when statically linking PIC code, or when
2304                  using -Bsymbolic.  */
2305               break;
2306             }
2307
2308           relocation = (htab->splt->output_section->vma
2309                         + htab->splt->output_offset
2310                         + h->plt.offset);
2311           unresolved_reloc = FALSE;
2312           break;
2313
2314         case R_386_32:
2315         case R_386_PC32:
2316           /* r_symndx will be zero only for relocs against symbols
2317              from removed linkonce sections, or sections discarded by
2318              a linker script.  */
2319           if (r_symndx == 0
2320               || (input_section->flags & SEC_ALLOC) == 0)
2321             break;
2322
2323           if ((info->shared
2324                && (h == NULL
2325                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2326                    || h->root.type != bfd_link_hash_undefweak)
2327                && (r_type != R_386_PC32
2328                    || !SYMBOL_CALLS_LOCAL (info, h)))
2329               || (ELIMINATE_COPY_RELOCS
2330                   && !info->shared
2331                   && h != NULL
2332                   && h->dynindx != -1
2333                   && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2334                   && (((h->elf_link_hash_flags
2335                         & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2336                        && (h->elf_link_hash_flags
2337                            & ELF_LINK_HASH_DEF_REGULAR) == 0)
2338                       || h->root.type == bfd_link_hash_undefweak
2339                       || h->root.type == bfd_link_hash_undefined)))
2340             {
2341               Elf_Internal_Rela outrel;
2342               bfd_byte *loc;
2343               bfd_boolean skip, relocate;
2344               asection *sreloc;
2345
2346               /* When generating a shared object, these relocations
2347                  are copied into the output file to be resolved at run
2348                  time.  */
2349
2350               skip = FALSE;
2351               relocate = FALSE;
2352
2353               outrel.r_offset =
2354                 _bfd_elf_section_offset (output_bfd, info, input_section,
2355                                          rel->r_offset);
2356               if (outrel.r_offset == (bfd_vma) -1)
2357                 skip = TRUE;
2358               else if (outrel.r_offset == (bfd_vma) -2)
2359                 skip = TRUE, relocate = TRUE;
2360               outrel.r_offset += (input_section->output_section->vma
2361                                   + input_section->output_offset);
2362
2363               if (skip)
2364                 memset (&outrel, 0, sizeof outrel);
2365               else if (h != NULL
2366                        && h->dynindx != -1
2367                        && (r_type == R_386_PC32
2368                            || !info->shared
2369                            || !info->symbolic
2370                            || (h->elf_link_hash_flags
2371                                & ELF_LINK_HASH_DEF_REGULAR) == 0))
2372                 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2373               else
2374                 {
2375                   /* This symbol is local, or marked to become local.  */
2376                   relocate = TRUE;
2377                   outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2378                 }
2379
2380               sreloc = elf_section_data (input_section)->sreloc;
2381               if (sreloc == NULL)
2382                 abort ();
2383
2384               loc = sreloc->contents;
2385               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2386               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2387
2388               /* If this reloc is against an external symbol, we do
2389                  not want to fiddle with the addend.  Otherwise, we
2390                  need to include the symbol value so that it becomes
2391                  an addend for the dynamic reloc.  */
2392               if (! relocate)
2393                 continue;
2394             }
2395           break;
2396
2397         case R_386_TLS_IE:
2398           if (info->shared)
2399             {
2400               Elf_Internal_Rela outrel;
2401               bfd_byte *loc;
2402               asection *sreloc;
2403
2404               outrel.r_offset = rel->r_offset
2405                                 + input_section->output_section->vma
2406                                 + input_section->output_offset;
2407               outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2408               sreloc = elf_section_data (input_section)->sreloc;
2409               if (sreloc == NULL)
2410                 abort ();
2411               loc = sreloc->contents;
2412               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2413               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2414             }
2415           /* Fall through */
2416
2417         case R_386_TLS_GD:
2418         case R_386_TLS_IE_32:
2419         case R_386_TLS_GOTIE:
2420           r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2421           tls_type = GOT_UNKNOWN;
2422           if (h == NULL && local_got_offsets)
2423             tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2424           else if (h != NULL)
2425             {
2426               tls_type = elf_i386_hash_entry(h)->tls_type;
2427               if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
2428                 r_type = R_386_TLS_LE_32;
2429             }
2430           if (tls_type == GOT_TLS_IE)
2431             tls_type = GOT_TLS_IE_NEG;
2432           if (r_type == R_386_TLS_GD)
2433             {
2434               if (tls_type == GOT_TLS_IE_POS)
2435                 r_type = R_386_TLS_GOTIE;
2436               else if (tls_type & GOT_TLS_IE)
2437                 r_type = R_386_TLS_IE_32;
2438             }
2439
2440           if (r_type == R_386_TLS_LE_32)
2441             {
2442               BFD_ASSERT (! unresolved_reloc);
2443               if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2444                 {
2445                   unsigned int val, type;
2446                   bfd_vma roff;
2447
2448                   /* GD->LE transition.  */
2449                   BFD_ASSERT (rel->r_offset >= 2);
2450                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2451                   BFD_ASSERT (type == 0x8d || type == 0x04);
2452                   BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2453                   BFD_ASSERT (bfd_get_8 (input_bfd,
2454                                          contents + rel->r_offset + 4)
2455                               == 0xe8);
2456                   BFD_ASSERT (rel + 1 < relend);
2457                   BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2458                   roff = rel->r_offset + 5;
2459                   val = bfd_get_8 (input_bfd,
2460                                    contents + rel->r_offset - 1);
2461                   if (type == 0x04)
2462                     {
2463                       /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2464                          Change it into:
2465                          movl %gs:0, %eax; subl $foo@tpoff, %eax
2466                          (6 byte form of subl).  */
2467                       BFD_ASSERT (rel->r_offset >= 3);
2468                       BFD_ASSERT (bfd_get_8 (input_bfd,
2469                                              contents + rel->r_offset - 3)
2470                                   == 0x8d);
2471                       BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2472                       memcpy (contents + rel->r_offset - 3,
2473                               "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2474                     }
2475                   else
2476                     {
2477                       BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2478                       if (rel->r_offset + 10 <= input_section->_raw_size
2479                           && bfd_get_8 (input_bfd,
2480                                         contents + rel->r_offset + 9) == 0x90)
2481                         {
2482                           /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2483                              Change it into:
2484                              movl %gs:0, %eax; subl $foo@tpoff, %eax
2485                              (6 byte form of subl).  */
2486                           memcpy (contents + rel->r_offset - 2,
2487                                   "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2488                           roff = rel->r_offset + 6;
2489                         }
2490                       else
2491                         {
2492                           /* leal foo(%reg), %eax; call ___tls_get_addr
2493                              Change it into:
2494                              movl %gs:0, %eax; subl $foo@tpoff, %eax
2495                              (5 byte form of subl).  */
2496                           memcpy (contents + rel->r_offset - 2,
2497                                   "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2498                         }
2499                     }
2500                   bfd_put_32 (output_bfd, tpoff (info, relocation),
2501                               contents + roff);
2502                   /* Skip R_386_PLT32.  */
2503                   rel++;
2504                   continue;
2505                 }
2506               else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
2507                 {
2508                   unsigned int val, type;
2509
2510                   /* IE->LE transition:
2511                      Originally it can be one of:
2512                      movl foo, %eax
2513                      movl foo, %reg
2514                      addl foo, %reg
2515                      We change it into:
2516                      movl $foo, %eax
2517                      movl $foo, %reg
2518                      addl $foo, %reg.  */
2519                   BFD_ASSERT (rel->r_offset >= 1);
2520                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2521                   BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2522                   if (val == 0xa1)
2523                     {
2524                       /* movl foo, %eax.  */
2525                       bfd_put_8 (output_bfd, 0xb8,
2526                                  contents + rel->r_offset - 1);
2527                     }
2528                   else
2529                     {
2530                       BFD_ASSERT (rel->r_offset >= 2);
2531                       type = bfd_get_8 (input_bfd,
2532                                         contents + rel->r_offset - 2);
2533                       switch (type)
2534                         {
2535                         case 0x8b:
2536                           /* movl */
2537                           BFD_ASSERT ((val & 0xc7) == 0x05);
2538                           bfd_put_8 (output_bfd, 0xc7,
2539                                      contents + rel->r_offset - 2);
2540                           bfd_put_8 (output_bfd,
2541                                      0xc0 | ((val >> 3) & 7),
2542                                      contents + rel->r_offset - 1);
2543                           break;
2544                         case 0x03:
2545                           /* addl */
2546                           BFD_ASSERT ((val & 0xc7) == 0x05);
2547                           bfd_put_8 (output_bfd, 0x81,
2548                                      contents + rel->r_offset - 2);
2549                           bfd_put_8 (output_bfd,
2550                                      0xc0 | ((val >> 3) & 7),
2551                                      contents + rel->r_offset - 1);
2552                           break;
2553                         default:
2554                           BFD_FAIL ();
2555                           break;
2556                         }
2557                     }
2558                   bfd_put_32 (output_bfd, -tpoff (info, relocation),
2559                               contents + rel->r_offset);
2560                   continue;
2561                 }
2562               else
2563                 {
2564                   unsigned int val, type;
2565
2566                   /* {IE_32,GOTIE}->LE transition:
2567                      Originally it can be one of:
2568                      subl foo(%reg1), %reg2
2569                      movl foo(%reg1), %reg2
2570                      addl foo(%reg1), %reg2
2571                      We change it into:
2572                      subl $foo, %reg2
2573                      movl $foo, %reg2 (6 byte form)
2574                      addl $foo, %reg2.  */
2575                   BFD_ASSERT (rel->r_offset >= 2);
2576                   type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2577                   val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2578                   BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2579                   BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
2580                   if (type == 0x8b)
2581                     {
2582                       /* movl */
2583                       bfd_put_8 (output_bfd, 0xc7,
2584                                  contents + rel->r_offset - 2);
2585                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2586                                  contents + rel->r_offset - 1);
2587                     }
2588                   else if (type == 0x2b)
2589                     {
2590                       /* subl */
2591                       bfd_put_8 (output_bfd, 0x81,
2592                                  contents + rel->r_offset - 2);
2593                       bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2594                                  contents + rel->r_offset - 1);
2595                     }
2596                   else if (type == 0x03)
2597                     {
2598                       /* addl */
2599                       bfd_put_8 (output_bfd, 0x81,
2600                                  contents + rel->r_offset - 2);
2601                       bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2602                                  contents + rel->r_offset - 1);
2603                     }
2604                   else
2605                     BFD_FAIL ();
2606                   if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2607                     bfd_put_32 (output_bfd, -tpoff (info, relocation),
2608                                 contents + rel->r_offset);
2609                   else
2610                     bfd_put_32 (output_bfd, tpoff (info, relocation),
2611                                 contents + rel->r_offset);
2612                   continue;
2613                 }
2614             }
2615
2616           if (htab->sgot == NULL)
2617             abort ();
2618
2619           if (h != NULL)
2620             off = h->got.offset;
2621           else
2622             {
2623               if (local_got_offsets == NULL)
2624                 abort ();
2625
2626               off = local_got_offsets[r_symndx];
2627             }
2628
2629           if ((off & 1) != 0)
2630             off &= ~1;
2631           else
2632             {
2633               Elf_Internal_Rela outrel;
2634               bfd_byte *loc;
2635               int dr_type, indx;
2636
2637               if (htab->srelgot == NULL)
2638                 abort ();
2639
2640               outrel.r_offset = (htab->sgot->output_section->vma
2641                                  + htab->sgot->output_offset + off);
2642
2643               indx = h && h->dynindx != -1 ? h->dynindx : 0;
2644               if (r_type == R_386_TLS_GD)
2645                 dr_type = R_386_TLS_DTPMOD32;
2646               else if (tls_type == GOT_TLS_IE_POS)
2647                 dr_type = R_386_TLS_TPOFF;
2648               else
2649                 dr_type = R_386_TLS_TPOFF32;
2650               if (dr_type == R_386_TLS_TPOFF && indx == 0)
2651                 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
2652                             htab->sgot->contents + off);
2653               else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
2654                 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
2655                             htab->sgot->contents + off);
2656               else
2657                 bfd_put_32 (output_bfd, 0,
2658                             htab->sgot->contents + off);
2659               outrel.r_info = ELF32_R_INFO (indx, dr_type);
2660               loc = htab->srelgot->contents;
2661               loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2662               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2663
2664               if (r_type == R_386_TLS_GD)
2665                 {
2666                   if (indx == 0)
2667                     {
2668                       BFD_ASSERT (! unresolved_reloc);
2669                       bfd_put_32 (output_bfd,
2670                                   relocation - dtpoff_base (info),
2671                                   htab->sgot->contents + off + 4);
2672                     }
2673                   else
2674                     {
2675                       bfd_put_32 (output_bfd, 0,
2676                                   htab->sgot->contents + off + 4);
2677                       outrel.r_info = ELF32_R_INFO (indx,
2678                                                     R_386_TLS_DTPOFF32);
2679                       outrel.r_offset += 4;
2680                       htab->srelgot->reloc_count++;
2681                       loc += sizeof (Elf32_External_Rel);
2682                       bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2683                     }
2684                 }
2685               else if (tls_type == GOT_TLS_IE_BOTH)
2686                 {
2687                   bfd_put_32 (output_bfd,
2688                               indx == 0 ? relocation - dtpoff_base (info) : 0,
2689                               htab->sgot->contents + off + 4);
2690                   outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2691                   outrel.r_offset += 4;
2692                   htab->srelgot->reloc_count++;
2693                   loc += sizeof (Elf32_External_Rel);
2694                   bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2695                 }
2696
2697               if (h != NULL)
2698                 h->got.offset |= 1;
2699               else
2700                 local_got_offsets[r_symndx] |= 1;
2701             }
2702
2703           if (off >= (bfd_vma) -2)
2704             abort ();
2705           if (r_type == ELF32_R_TYPE (rel->r_info))
2706             {
2707               bfd_vma g_o_t = htab->sgotplt->output_section->vma
2708                               + htab->sgotplt->output_offset;
2709               relocation = htab->sgot->output_section->vma
2710                            + htab->sgot->output_offset + off - g_o_t;
2711               if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
2712                   && tls_type == GOT_TLS_IE_BOTH)
2713                 relocation += 4;
2714               if (r_type == R_386_TLS_IE)
2715                 relocation += g_o_t;
2716               unresolved_reloc = FALSE;
2717             }
2718           else
2719             {
2720               unsigned int val, type;
2721               bfd_vma roff;
2722
2723               /* GD->IE transition.  */
2724               BFD_ASSERT (rel->r_offset >= 2);
2725               type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2726               BFD_ASSERT (type == 0x8d || type == 0x04);
2727               BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2728               BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2729                           == 0xe8);
2730               BFD_ASSERT (rel + 1 < relend);
2731               BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2732               roff = rel->r_offset - 3;
2733               val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2734               if (type == 0x04)
2735                 {
2736                   /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2737                      Change it into:
2738                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
2739                   BFD_ASSERT (rel->r_offset >= 3);
2740                   BFD_ASSERT (bfd_get_8 (input_bfd,
2741                                          contents + rel->r_offset - 3)
2742                               == 0x8d);
2743                   BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2744                   val >>= 3;
2745                 }
2746               else
2747                 {
2748                   /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2749                      Change it into:
2750                      movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax.  */
2751                   BFD_ASSERT (rel->r_offset + 10 <= input_section->_raw_size);
2752                   BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2753                   BFD_ASSERT (bfd_get_8 (input_bfd,
2754                                          contents + rel->r_offset + 9)
2755                               == 0x90);
2756                   roff = rel->r_offset - 2;
2757                 }
2758               memcpy (contents + roff,
2759                       "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2760               contents[roff + 7] = 0x80 | (val & 7);
2761               /* If foo is used only with foo@gotntpoff(%reg) and
2762                  foo@indntpoff, but not with foo@gottpoff(%reg), change
2763                  subl $foo@gottpoff(%reg), %eax
2764                  into:
2765                  addl $foo@gotntpoff(%reg), %eax.  */
2766               if (r_type == R_386_TLS_GOTIE)
2767                 {
2768                   contents[roff + 6] = 0x03;
2769                   if (tls_type == GOT_TLS_IE_BOTH)
2770                     off += 4;
2771                 }
2772               bfd_put_32 (output_bfd,
2773                           htab->sgot->output_section->vma
2774                           + htab->sgot->output_offset + off
2775                           - htab->sgotplt->output_section->vma
2776                           - htab->sgotplt->output_offset,
2777                           contents + roff + 8);
2778               /* Skip R_386_PLT32.  */
2779               rel++;
2780               continue;
2781             }
2782           break;
2783
2784         case R_386_TLS_LDM:
2785           if (! info->shared)
2786             {
2787               unsigned int val;
2788
2789               /* LD->LE transition:
2790                  Ensure it is:
2791                  leal foo(%reg), %eax; call ___tls_get_addr.
2792                  We change it into:
2793                  movl %gs:0, %eax; nop; leal 0(%esi,1), %esi.  */
2794               BFD_ASSERT (rel->r_offset >= 2);
2795               BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2796                           == 0x8d);
2797               val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2798               BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2799               BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2800               BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2801                           == 0xe8);
2802               BFD_ASSERT (rel + 1 < relend);
2803               BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2804               memcpy (contents + rel->r_offset - 2,
2805                       "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2806               /* Skip R_386_PLT32.  */
2807               rel++;
2808               continue;
2809             }
2810
2811           if (htab->sgot == NULL)
2812             abort ();
2813
2814           off = htab->tls_ldm_got.offset;
2815           if (off & 1)
2816             off &= ~1;
2817           else
2818             {
2819               Elf_Internal_Rela outrel;
2820               bfd_byte *loc;
2821
2822               if (htab->srelgot == NULL)
2823                 abort ();
2824
2825               outrel.r_offset = (htab->sgot->output_section->vma
2826                                  + htab->sgot->output_offset + off);
2827
2828               bfd_put_32 (output_bfd, 0,
2829                           htab->sgot->contents + off);
2830               bfd_put_32 (output_bfd, 0,
2831                           htab->sgot->contents + off + 4);
2832               outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
2833               loc = htab->srelgot->contents;
2834               loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2835               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2836               htab->tls_ldm_got.offset |= 1;
2837             }
2838           relocation = htab->sgot->output_section->vma
2839                        + htab->sgot->output_offset + off
2840                        - htab->sgotplt->output_section->vma
2841                        - htab->sgotplt->output_offset;
2842           unresolved_reloc = FALSE;
2843           break;
2844
2845         case R_386_TLS_LDO_32:
2846           if (info->shared || (input_section->flags & SEC_CODE) == 0)
2847             relocation -= dtpoff_base (info);
2848           else
2849             /* When converting LDO to LE, we must negate.  */
2850             relocation = -tpoff (info, relocation);
2851           break;
2852
2853         case R_386_TLS_LE_32:
2854         case R_386_TLS_LE:
2855           if (info->shared)
2856             {
2857               Elf_Internal_Rela outrel;
2858               asection *sreloc;
2859               bfd_byte *loc;
2860               int indx;
2861
2862               outrel.r_offset = rel->r_offset
2863                                 + input_section->output_section->vma
2864                                 + input_section->output_offset;
2865               if (h != NULL && h->dynindx != -1)
2866                 indx = h->dynindx;
2867               else
2868                 indx = 0;
2869               if (r_type == R_386_TLS_LE_32)
2870                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
2871               else
2872                 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2873               sreloc = elf_section_data (input_section)->sreloc;
2874               if (sreloc == NULL)
2875                 abort ();
2876               loc = sreloc->contents;
2877               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2878               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2879               if (indx)
2880                 continue;
2881               else if (r_type == R_386_TLS_LE_32)
2882                 relocation = dtpoff_base (info) - relocation;
2883               else
2884                 relocation -= dtpoff_base (info);
2885             }
2886           else if (r_type == R_386_TLS_LE_32)
2887             relocation = tpoff (info, relocation);
2888           else
2889             relocation = -tpoff (info, relocation);
2890           break;
2891
2892         default:
2893           break;
2894         }
2895
2896       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2897          because such sections are not SEC_ALLOC and thus ld.so will
2898          not process them.  */
2899       if (unresolved_reloc
2900           && !((input_section->flags & SEC_DEBUGGING) != 0
2901                && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2902         {
2903           (*_bfd_error_handler)
2904             (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2905              bfd_archive_filename (input_bfd),
2906              bfd_get_section_name (input_bfd, input_section),
2907              (long) rel->r_offset,
2908              h->root.root.string);
2909           return FALSE;
2910         }
2911
2912       r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2913                                     contents, rel->r_offset,
2914                                     relocation, 0);
2915
2916       if (r != bfd_reloc_ok)
2917         {
2918           const char *name;
2919
2920           if (h != NULL)
2921             name = h->root.root.string;
2922           else
2923             {
2924               name = bfd_elf_string_from_elf_section (input_bfd,
2925                                                       symtab_hdr->sh_link,
2926                                                       sym->st_name);
2927               if (name == NULL)
2928                 return FALSE;
2929               if (*name == '\0')
2930                 name = bfd_section_name (input_bfd, sec);
2931             }
2932
2933           if (r == bfd_reloc_overflow)
2934             {
2935               if (! ((*info->callbacks->reloc_overflow)
2936                      (info, name, howto->name, 0,
2937                       input_bfd, input_section, rel->r_offset)))
2938                 return FALSE;
2939             }
2940           else
2941             {
2942               (*_bfd_error_handler)
2943                 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2944                  bfd_archive_filename (input_bfd),
2945                  bfd_get_section_name (input_bfd, input_section),
2946                  (long) rel->r_offset, name, (int) r);
2947               return FALSE;
2948             }
2949         }
2950     }
2951
2952   return TRUE;
2953 }
2954
2955 /* Finish up dynamic symbol handling.  We set the contents of various
2956    dynamic sections here.  */
2957
2958 static bfd_boolean
2959 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
2960                                 struct bfd_link_info *info,
2961                                 struct elf_link_hash_entry *h,
2962                                 Elf_Internal_Sym *sym)
2963 {
2964   struct elf_i386_link_hash_table *htab;
2965
2966   htab = elf_i386_hash_table (info);
2967
2968   if (h->plt.offset != (bfd_vma) -1)
2969     {
2970       bfd_vma plt_index;
2971       bfd_vma got_offset;
2972       Elf_Internal_Rela rel;
2973       bfd_byte *loc;
2974
2975       /* This symbol has an entry in the procedure linkage table.  Set
2976          it up.  */
2977
2978       if (h->dynindx == -1
2979           || htab->splt == NULL
2980           || htab->sgotplt == NULL
2981           || htab->srelplt == NULL)
2982         abort ();
2983
2984       /* Get the index in the procedure linkage table which
2985          corresponds to this symbol.  This is the index of this symbol
2986          in all the symbols for which we are making plt entries.  The
2987          first entry in the procedure linkage table is reserved.  */
2988       plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2989
2990       /* Get the offset into the .got table of the entry that
2991          corresponds to this function.  Each .got entry is 4 bytes.
2992          The first three are reserved.  */
2993       got_offset = (plt_index + 3) * 4;
2994
2995       /* Fill in the entry in the procedure linkage table.  */
2996       if (! info->shared)
2997         {
2998           memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
2999                   PLT_ENTRY_SIZE);
3000           bfd_put_32 (output_bfd,
3001                       (htab->sgotplt->output_section->vma
3002                        + htab->sgotplt->output_offset
3003                        + got_offset),
3004                       htab->splt->contents + h->plt.offset + 2);
3005         }
3006       else
3007         {
3008           memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
3009                   PLT_ENTRY_SIZE);
3010           bfd_put_32 (output_bfd, got_offset,
3011                       htab->splt->contents + h->plt.offset + 2);
3012         }
3013
3014       bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
3015                   htab->splt->contents + h->plt.offset + 7);
3016       bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
3017                   htab->splt->contents + h->plt.offset + 12);
3018
3019       /* Fill in the entry in the global offset table.  */
3020       bfd_put_32 (output_bfd,
3021                   (htab->splt->output_section->vma
3022                    + htab->splt->output_offset
3023                    + h->plt.offset
3024                    + 6),
3025                   htab->sgotplt->contents + got_offset);
3026
3027       /* Fill in the entry in the .rel.plt section.  */
3028       rel.r_offset = (htab->sgotplt->output_section->vma
3029                       + htab->sgotplt->output_offset
3030                       + got_offset);
3031       rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3032       loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
3033       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3034
3035       if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3036         {
3037           /* Mark the symbol as undefined, rather than as defined in
3038              the .plt section.  Leave the value if there were any
3039              relocations where pointer equality matters (this is a clue
3040              for the dynamic linker, to make function pointer
3041              comparisons work between an application and shared
3042              library), otherwise set it to zero.  If a function is only
3043              called from a binary, there is no need to slow down
3044              shared libraries because of that.  */
3045           sym->st_shndx = SHN_UNDEF;
3046           if ((h->elf_link_hash_flags & ELF_LINK_POINTER_EQUALITY_NEEDED) == 0)
3047             sym->st_value = 0;
3048         }
3049     }
3050
3051   if (h->got.offset != (bfd_vma) -1
3052       && elf_i386_hash_entry(h)->tls_type != GOT_TLS_GD
3053       && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
3054     {
3055       Elf_Internal_Rela rel;
3056       bfd_byte *loc;
3057
3058       /* This symbol has an entry in the global offset table.  Set it
3059          up.  */
3060
3061       if (htab->sgot == NULL || htab->srelgot == NULL)
3062         abort ();
3063
3064       rel.r_offset = (htab->sgot->output_section->vma
3065                       + htab->sgot->output_offset
3066                       + (h->got.offset & ~(bfd_vma) 1));
3067
3068       /* If this is a static link, or it is a -Bsymbolic link and the
3069          symbol is defined locally or was forced to be local because
3070          of a version file, we just want to emit a RELATIVE reloc.
3071          The entry in the global offset table will already have been
3072          initialized in the relocate_section function.  */
3073       if (info->shared
3074           && SYMBOL_REFERENCES_LOCAL (info, h))
3075         {
3076           BFD_ASSERT((h->got.offset & 1) != 0);
3077           rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3078         }
3079       else
3080         {
3081           BFD_ASSERT((h->got.offset & 1) == 0);
3082           bfd_put_32 (output_bfd, (bfd_vma) 0,
3083                       htab->sgot->contents + h->got.offset);
3084           rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3085         }
3086
3087       loc = htab->srelgot->contents;
3088       loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3089       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3090     }
3091
3092   if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3093     {
3094       Elf_Internal_Rela rel;
3095       bfd_byte *loc;
3096
3097       /* This symbol needs a copy reloc.  Set it up.  */
3098
3099       if (h->dynindx == -1
3100           || (h->root.type != bfd_link_hash_defined
3101               && h->root.type != bfd_link_hash_defweak)
3102           || htab->srelbss == NULL)
3103         abort ();
3104
3105       rel.r_offset = (h->root.u.def.value
3106                       + h->root.u.def.section->output_section->vma
3107                       + h->root.u.def.section->output_offset);
3108       rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3109       loc = htab->srelbss->contents;
3110       loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
3111       bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3112     }
3113
3114   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
3115   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3116       || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3117     sym->st_shndx = SHN_ABS;
3118
3119   return TRUE;
3120 }
3121
3122 /* Used to decide how to sort relocs in an optimal manner for the
3123    dynamic linker, before writing them out.  */
3124
3125 static enum elf_reloc_type_class
3126 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
3127 {
3128   switch (ELF32_R_TYPE (rela->r_info))
3129     {
3130     case R_386_RELATIVE:
3131       return reloc_class_relative;
3132     case R_386_JUMP_SLOT:
3133       return reloc_class_plt;
3134     case R_386_COPY:
3135       return reloc_class_copy;
3136     default:
3137       return reloc_class_normal;
3138     }
3139 }
3140
3141 /* Finish up the dynamic sections.  */
3142
3143 static bfd_boolean
3144 elf_i386_finish_dynamic_sections (bfd *output_bfd,
3145                                   struct bfd_link_info *info)
3146 {
3147   struct elf_i386_link_hash_table *htab;
3148   bfd *dynobj;
3149   asection *sdyn;
3150
3151   htab = elf_i386_hash_table (info);
3152   dynobj = htab->elf.dynobj;
3153   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3154
3155   if (htab->elf.dynamic_sections_created)
3156     {
3157       Elf32_External_Dyn *dyncon, *dynconend;
3158
3159       if (sdyn == NULL || htab->sgot == NULL)
3160         abort ();
3161
3162       dyncon = (Elf32_External_Dyn *) sdyn->contents;
3163       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3164       for (; dyncon < dynconend; dyncon++)
3165         {
3166           Elf_Internal_Dyn dyn;
3167           asection *s;
3168
3169           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3170
3171           switch (dyn.d_tag)
3172             {
3173             default:
3174               continue;
3175
3176             case DT_PLTGOT:
3177               s = htab->sgotplt;
3178               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3179               break;
3180
3181             case DT_JMPREL:
3182               s = htab->srelplt;
3183               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3184               break;
3185
3186             case DT_PLTRELSZ:
3187               s = htab->srelplt;
3188               dyn.d_un.d_val = s->_raw_size;
3189               break;
3190
3191             case DT_RELSZ:
3192               /* My reading of the SVR4 ABI indicates that the
3193                  procedure linkage table relocs (DT_JMPREL) should be
3194                  included in the overall relocs (DT_REL).  This is
3195                  what Solaris does.  However, UnixWare can not handle
3196                  that case.  Therefore, we override the DT_RELSZ entry
3197                  here to make it not include the JMPREL relocs.  */
3198               s = htab->srelplt;
3199               if (s == NULL)
3200                 continue;
3201               dyn.d_un.d_val -= s->_raw_size;
3202               break;
3203
3204             case DT_REL:
3205               /* We may not be using the standard ELF linker script.
3206                  If .rel.plt is the first .rel section, we adjust
3207                  DT_REL to not include it.  */
3208               s = htab->srelplt;
3209               if (s == NULL)
3210                 continue;
3211               if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3212                 continue;
3213               dyn.d_un.d_ptr += s->_raw_size;
3214               break;
3215             }
3216
3217           bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3218         }
3219
3220       /* Fill in the first entry in the procedure linkage table.  */
3221       if (htab->splt && htab->splt->_raw_size > 0)
3222         {
3223           if (info->shared)
3224             memcpy (htab->splt->contents,
3225                     elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
3226           else
3227             {
3228               memcpy (htab->splt->contents,
3229                       elf_i386_plt0_entry, PLT_ENTRY_SIZE);
3230               bfd_put_32 (output_bfd,
3231                           (htab->sgotplt->output_section->vma
3232                            + htab->sgotplt->output_offset
3233                            + 4),
3234                           htab->splt->contents + 2);
3235               bfd_put_32 (output_bfd,
3236                           (htab->sgotplt->output_section->vma
3237                            + htab->sgotplt->output_offset
3238                            + 8),
3239                           htab->splt->contents + 8);
3240             }
3241
3242           /* UnixWare sets the entsize of .plt to 4, although that doesn't
3243              really seem like the right value.  */
3244           elf_section_data (htab->splt->output_section)
3245             ->this_hdr.sh_entsize = 4;
3246         }
3247     }
3248
3249   if (htab->sgotplt)
3250     {
3251       /* Fill in the first three entries in the global offset table.  */
3252       if (htab->sgotplt->_raw_size > 0)
3253         {
3254           bfd_put_32 (output_bfd,
3255                       (sdyn == NULL ? 0
3256                        : sdyn->output_section->vma + sdyn->output_offset),
3257                       htab->sgotplt->contents);
3258           bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3259           bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
3260         }
3261
3262       elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3263     }
3264
3265   if (htab->sgot && htab->sgot->_raw_size > 0)
3266     elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3267
3268   return TRUE;
3269 }
3270
3271 /* Return address for Ith PLT stub in section PLT, for relocation REL
3272    or (bfd_vma) -1 if it should not be included.  */
3273
3274 static bfd_vma
3275 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3276                       const arelent *rel ATTRIBUTE_UNUSED)
3277 {
3278   return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3279 }
3280
3281
3282 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vec
3283 #define TARGET_LITTLE_NAME              "elf32-i386"
3284 #define ELF_ARCH                        bfd_arch_i386
3285 #define ELF_MACHINE_CODE                EM_386
3286 #define ELF_MAXPAGESIZE                 0x1000
3287
3288 #define elf_backend_can_gc_sections     1
3289 #define elf_backend_can_refcount        1
3290 #define elf_backend_want_got_plt        1
3291 #define elf_backend_plt_readonly        1
3292 #define elf_backend_want_plt_sym        0
3293 #define elf_backend_got_header_size     12
3294
3295 /* Support RELA for objdump of prelink objects.  */
3296 #define elf_info_to_howto                     elf_i386_info_to_howto_rel
3297 #define elf_info_to_howto_rel                 elf_i386_info_to_howto_rel
3298
3299 #define bfd_elf32_mkobject                    elf_i386_mkobject
3300
3301 #define bfd_elf32_bfd_is_local_label_name     elf_i386_is_local_label_name
3302 #define bfd_elf32_bfd_link_hash_table_create  elf_i386_link_hash_table_create
3303 #define bfd_elf32_bfd_reloc_type_lookup       elf_i386_reloc_type_lookup
3304
3305 #define elf_backend_adjust_dynamic_symbol     elf_i386_adjust_dynamic_symbol
3306 #define elf_backend_check_relocs              elf_i386_check_relocs
3307 #define elf_backend_copy_indirect_symbol      elf_i386_copy_indirect_symbol
3308 #define elf_backend_create_dynamic_sections   elf_i386_create_dynamic_sections
3309 #define elf_backend_fake_sections             elf_i386_fake_sections
3310 #define elf_backend_finish_dynamic_sections   elf_i386_finish_dynamic_sections
3311 #define elf_backend_finish_dynamic_symbol     elf_i386_finish_dynamic_symbol
3312 #define elf_backend_gc_mark_hook              elf_i386_gc_mark_hook
3313 #define elf_backend_gc_sweep_hook             elf_i386_gc_sweep_hook
3314 #define elf_backend_grok_prstatus             elf_i386_grok_prstatus
3315 #define elf_backend_grok_psinfo               elf_i386_grok_psinfo
3316 #define elf_backend_reloc_type_class          elf_i386_reloc_type_class
3317 #define elf_backend_relocate_section          elf_i386_relocate_section
3318 #define elf_backend_size_dynamic_sections     elf_i386_size_dynamic_sections
3319 #define elf_backend_plt_sym_val               elf_i386_plt_sym_val
3320
3321 #include "elf32-target.h"
3322
3323 /* FreeBSD support.  */
3324
3325 #undef  TARGET_LITTLE_SYM
3326 #define TARGET_LITTLE_SYM               bfd_elf32_i386_freebsd_vec
3327 #undef  TARGET_LITTLE_NAME
3328 #define TARGET_LITTLE_NAME              "elf32-i386-freebsd"
3329
3330 /* The kernel recognizes executables as valid only if they carry a
3331    "FreeBSD" label in the ELF header.  So we put this label on all
3332    executables and (for simplicity) also all other object files.  */
3333
3334 static void
3335 elf_i386_post_process_headers (bfd *abfd,
3336                                struct bfd_link_info *info ATTRIBUTE_UNUSED)
3337 {
3338   Elf_Internal_Ehdr *i_ehdrp;
3339
3340   i_ehdrp = elf_elfheader (abfd);
3341
3342   /* Put an ABI label supported by FreeBSD >= 4.1.  */
3343   i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
3344 #ifdef OLD_FREEBSD_ABI_LABEL
3345   /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
3346   memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
3347 #endif
3348 }
3349
3350 #undef  elf_backend_post_process_headers
3351 #define elf_backend_post_process_headers        elf_i386_post_process_headers
3352 #undef  elf32_bed
3353 #define elf32_bed                               elf32_i386_fbsd_bed
3354
3355 #include "elf32-target.h"