bfd/elf32-s390.c

   1 /* IBM S/390-specific support for 32-bit ELF
   2    Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
   3    Free Software Foundation, Inc.
   4    Contributed by Carl B. Pedersen and Martin Schwidefsky.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "bfdlink.h"
  26 #include "libbfd.h"
  27 #include "elf-bfd.h"
  28
  29 static reloc_howto_type *elf_s390_reloc_type_lookup
  30   PARAMS ((bfd *, bfd_reloc_code_real_type));
  31 static void elf_s390_info_to_howto
  32   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
  33 static bfd_boolean elf_s390_is_local_label_name
  34   PARAMS ((bfd *, const char *));
  35 static struct bfd_hash_entry *link_hash_newfunc
  36   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
  37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
  38   PARAMS ((bfd *));
  39 static bfd_boolean create_got_section
  40   PARAMS((bfd *, struct bfd_link_info *));
  41 static bfd_boolean elf_s390_create_dynamic_sections
  42   PARAMS((bfd *, struct bfd_link_info *));
  43 static void elf_s390_copy_indirect_symbol
  44   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
  45            struct elf_link_hash_entry *));
  46 static bfd_boolean elf_s390_check_relocs
  47   PARAMS ((bfd *, struct bfd_link_info *, asection *,
  48            const Elf_Internal_Rela *));
  49 struct elf_s390_link_hash_entry;
  50 static void elf_s390_adjust_gotplt
  51   PARAMS ((struct elf_s390_link_hash_entry *));
  52 static bfd_boolean elf_s390_adjust_dynamic_symbol
  53   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
  54 static bfd_boolean allocate_dynrelocs
  55   PARAMS ((struct elf_link_hash_entry *, PTR));
  56 static bfd_boolean readonly_dynrelocs
  57   PARAMS ((struct elf_link_hash_entry *, PTR));
  58 static bfd_boolean elf_s390_size_dynamic_sections
  59   PARAMS ((bfd *, struct bfd_link_info *));
  60 static bfd_boolean elf_s390_relocate_section
  61   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
  62            Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
  63 static bfd_boolean elf_s390_finish_dynamic_symbol
  64   PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
  65            Elf_Internal_Sym *));
  66 static enum elf_reloc_type_class elf_s390_reloc_type_class
  67   PARAMS ((const Elf_Internal_Rela *));
  68 static bfd_boolean elf_s390_finish_dynamic_sections
  69   PARAMS ((bfd *, struct bfd_link_info *));
  70 static bfd_boolean elf_s390_object_p
  71   PARAMS ((bfd *));
  72 static bfd_boolean elf_s390_grok_prstatus
  73   PARAMS ((bfd *, Elf_Internal_Note *));
  74 static int elf_s390_tls_transition
  75   PARAMS ((struct bfd_link_info *, int, int));
  76 static bfd_reloc_status_type s390_tls_reloc
  77   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  78 static bfd_vma dtpoff_base
  79   PARAMS ((struct bfd_link_info *));
  80 static bfd_vma tpoff
  81   PARAMS ((struct bfd_link_info *, bfd_vma));
  82 static void invalid_tls_insn
  83   PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
  84 static bfd_reloc_status_type s390_elf_ldisp_reloc
  85   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  86
  87 #include "elf/s390.h"
  88
  89 /* The relocation "howto" table.  */
  90
  91 static reloc_howto_type elf_howto_table[] =
  92 {
  93   HOWTO (R_390_NONE,            /* type */
  94          0,                     /* rightshift */
  95          0,                     /* size (0 = byte, 1 = short, 2 = long) */
  96          0,                     /* bitsize */
  97          FALSE,                 /* pc_relative */
  98          0,                     /* bitpos */
  99          complain_overflow_dont, /* complain_on_overflow */
 100          bfd_elf_generic_reloc, /* special_function */
 101          "R_390_NONE",          /* name */
 102          FALSE,                 /* partial_inplace */
 103          0,                     /* src_mask */
 104          0,                     /* dst_mask */
 105          FALSE),                /* pcrel_offset */
 106
 107   HOWTO(R_390_8,         0, 0,  8, FALSE, 0, complain_overflow_bitfield,
 108         bfd_elf_generic_reloc, "R_390_8",        FALSE, 0,0x000000ff, FALSE),
 109   HOWTO(R_390_12,        0, 1, 12, FALSE, 0, complain_overflow_dont,
 110         bfd_elf_generic_reloc, "R_390_12",       FALSE, 0,0x00000fff, FALSE),
 111   HOWTO(R_390_16,        0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 112         bfd_elf_generic_reloc, "R_390_16",       FALSE, 0,0x0000ffff, FALSE),
 113   HOWTO(R_390_32,        0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 114         bfd_elf_generic_reloc, "R_390_32",       FALSE, 0,0xffffffff, FALSE),
 115   HOWTO(R_390_PC32,      0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 116         bfd_elf_generic_reloc, "R_390_PC32",     FALSE, 0,0xffffffff, TRUE),
 117   HOWTO(R_390_GOT12,     0, 1, 12, FALSE, 0, complain_overflow_bitfield,
 118         bfd_elf_generic_reloc, "R_390_GOT12",    FALSE, 0,0x00000fff, FALSE),
 119   HOWTO(R_390_GOT32,     0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 120         bfd_elf_generic_reloc, "R_390_GOT32",    FALSE, 0,0xffffffff, FALSE),
 121   HOWTO(R_390_PLT32,     0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 122         bfd_elf_generic_reloc, "R_390_PLT32",    FALSE, 0,0xffffffff, TRUE),
 123   HOWTO(R_390_COPY,      0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 124         bfd_elf_generic_reloc, "R_390_COPY",     FALSE, 0,0xffffffff, FALSE),
 125   HOWTO(R_390_GLOB_DAT,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 126         bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
 127   HOWTO(R_390_JMP_SLOT,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 128         bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
 129   HOWTO(R_390_RELATIVE,  0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 130         bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
 131   HOWTO(R_390_GOTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 132         bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
 133   HOWTO(R_390_GOTPC,     0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 134         bfd_elf_generic_reloc, "R_390_GOTPC",    FALSE, 0,0xffffffff, TRUE),
 135   HOWTO(R_390_GOT16,     0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 136         bfd_elf_generic_reloc, "R_390_GOT16",    FALSE, 0,0x0000ffff, FALSE),
 137   HOWTO(R_390_PC16,      0, 1, 16,  TRUE, 0, complain_overflow_bitfield,
 138         bfd_elf_generic_reloc, "R_390_PC16",     FALSE, 0,0x0000ffff, TRUE),
 139   HOWTO(R_390_PC16DBL,   1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
 140         bfd_elf_generic_reloc, "R_390_PC16DBL",  FALSE, 0,0x0000ffff, TRUE),
 141   HOWTO(R_390_PLT16DBL,  1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
 142         bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
 143   HOWTO(R_390_PC32DBL,   1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 144         bfd_elf_generic_reloc, "R_390_PC32DBL",  FALSE, 0,0xffffffff, TRUE),
 145   HOWTO(R_390_PLT32DBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 146         bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
 147   HOWTO(R_390_GOTPCDBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 148         bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
 149   EMPTY_HOWTO (R_390_64),       /* Empty entry for R_390_64.  */
 150   EMPTY_HOWTO (R_390_PC64),     /* Empty entry for R_390_PC64.  */
 151   EMPTY_HOWTO (R_390_GOT64),    /* Empty entry for R_390_GOT64.  */
 152   EMPTY_HOWTO (R_390_PLT64),    /* Empty entry for R_390_PLT64.  */
 153   HOWTO(R_390_GOTENT,    1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 154         bfd_elf_generic_reloc, "R_390_GOTENT",   FALSE, 0,0xffffffff, TRUE),
 155   HOWTO(R_390_GOTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 156         bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
 157   EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64.  */
 158   HOWTO(R_390_GOTPLT12,  0, 1, 12, FALSE, 0, complain_overflow_dont,
 159         bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
 160   HOWTO(R_390_GOTPLT16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 161         bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
 162   HOWTO(R_390_GOTPLT32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 163         bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
 164   EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64.  */
 165   HOWTO(R_390_GOTPLTENT, 1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 166         bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
 167   HOWTO(R_390_PLTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 168         bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
 169   HOWTO(R_390_PLTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 170         bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
 171   EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64.  */
 172   HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 173         s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
 174   HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 175         s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
 176   HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 177         s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
 178   HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 179         bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
 180   EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64.  */
 181   HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
 182         bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
 183   HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 184         bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
 185   EMPTY_HOWTO (R_390_TLS_GOTIE64),      /* Empty entry for R_390_TLS_GOTIE64.  */
 186   HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 187         bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
 188   EMPTY_HOWTO (R_390_TLS_LDM64),        /* Empty entry for R_390_TLS_LDM64.  */
 189   HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 190         bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
 191   EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64.  */
 192   HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
 193         bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
 194   HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 195         bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
 196   EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64.  */
 197   HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 198         bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
 199   EMPTY_HOWTO (R_390_TLS_LDO64),        /* Empty entry for R_390_TLS_LDO64.  */
 200   HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 201         bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
 202   HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 203         bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
 204   HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 205         bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
 206   HOWTO(R_390_20,        0, 2, 20, FALSE, 8, complain_overflow_dont,
 207         s390_elf_ldisp_reloc, "R_390_20",      FALSE, 0,0x0fffff00, FALSE),
 208   HOWTO(R_390_GOT20,     0, 2, 20, FALSE, 8, complain_overflow_dont,
 209         s390_elf_ldisp_reloc, "R_390_GOT20",   FALSE, 0,0x0fffff00, FALSE),
 210   HOWTO(R_390_GOTPLT20,  0, 2, 20, FALSE, 8, complain_overflow_dont,
 211         s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
 212   HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
 213         s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
 214 };
 215
 216 /* GNU extension to record C++ vtable hierarchy.  */
 217 static reloc_howto_type elf32_s390_vtinherit_howto =
 218   HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
 219 static reloc_howto_type elf32_s390_vtentry_howto =
 220   HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
 221
 222 static reloc_howto_type *
 223 elf_s390_reloc_type_lookup (abfd, code)
 224      bfd *abfd ATTRIBUTE_UNUSED;
 225      bfd_reloc_code_real_type code;
 226 {
 227   switch (code)
 228     {
 229     case BFD_RELOC_NONE:
 230       return &elf_howto_table[(int) R_390_NONE];
 231     case BFD_RELOC_8:
 232       return &elf_howto_table[(int) R_390_8];
 233     case BFD_RELOC_390_12:
 234       return &elf_howto_table[(int) R_390_12];
 235     case BFD_RELOC_16:
 236       return &elf_howto_table[(int) R_390_16];
 237     case BFD_RELOC_32:
 238       return &elf_howto_table[(int) R_390_32];
 239     case BFD_RELOC_CTOR:
 240       return &elf_howto_table[(int) R_390_32];
 241     case BFD_RELOC_32_PCREL:
 242       return &elf_howto_table[(int) R_390_PC32];
 243     case BFD_RELOC_390_GOT12:
 244       return &elf_howto_table[(int) R_390_GOT12];
 245     case BFD_RELOC_32_GOT_PCREL:
 246       return &elf_howto_table[(int) R_390_GOT32];
 247     case BFD_RELOC_390_PLT32:
 248       return &elf_howto_table[(int) R_390_PLT32];
 249     case BFD_RELOC_390_COPY:
 250       return &elf_howto_table[(int) R_390_COPY];
 251     case BFD_RELOC_390_GLOB_DAT:
 252       return &elf_howto_table[(int) R_390_GLOB_DAT];
 253     case BFD_RELOC_390_JMP_SLOT:
 254       return &elf_howto_table[(int) R_390_JMP_SLOT];
 255     case BFD_RELOC_390_RELATIVE:
 256       return &elf_howto_table[(int) R_390_RELATIVE];
 257     case BFD_RELOC_32_GOTOFF:
 258       return &elf_howto_table[(int) R_390_GOTOFF32];
 259     case BFD_RELOC_390_GOTPC:
 260       return &elf_howto_table[(int) R_390_GOTPC];
 261     case BFD_RELOC_390_GOT16:
 262       return &elf_howto_table[(int) R_390_GOT16];
 263     case BFD_RELOC_16_PCREL:
 264       return &elf_howto_table[(int) R_390_PC16];
 265     case BFD_RELOC_390_PC16DBL:
 266       return &elf_howto_table[(int) R_390_PC16DBL];
 267     case BFD_RELOC_390_PLT16DBL:
 268       return &elf_howto_table[(int) R_390_PLT16DBL];
 269     case BFD_RELOC_390_PC32DBL:
 270       return &elf_howto_table[(int) R_390_PC32DBL];
 271     case BFD_RELOC_390_PLT32DBL:
 272       return &elf_howto_table[(int) R_390_PLT32DBL];
 273     case BFD_RELOC_390_GOTPCDBL:
 274       return &elf_howto_table[(int) R_390_GOTPCDBL];
 275     case BFD_RELOC_390_GOTENT:
 276       return &elf_howto_table[(int) R_390_GOTENT];
 277     case BFD_RELOC_16_GOTOFF:
 278       return &elf_howto_table[(int) R_390_GOTOFF16];
 279     case BFD_RELOC_390_GOTPLT12:
 280       return &elf_howto_table[(int) R_390_GOTPLT12];
 281     case BFD_RELOC_390_GOTPLT16:
 282       return &elf_howto_table[(int) R_390_GOTPLT16];
 283     case BFD_RELOC_390_GOTPLT32:
 284       return &elf_howto_table[(int) R_390_GOTPLT32];
 285     case BFD_RELOC_390_GOTPLTENT:
 286       return &elf_howto_table[(int) R_390_GOTPLTENT];
 287     case BFD_RELOC_390_PLTOFF16:
 288       return &elf_howto_table[(int) R_390_PLTOFF16];
 289     case BFD_RELOC_390_PLTOFF32:
 290       return &elf_howto_table[(int) R_390_PLTOFF32];
 291     case BFD_RELOC_390_TLS_LOAD:
 292       return &elf_howto_table[(int) R_390_TLS_LOAD];
 293     case BFD_RELOC_390_TLS_GDCALL:
 294       return &elf_howto_table[(int) R_390_TLS_GDCALL];
 295     case BFD_RELOC_390_TLS_LDCALL:
 296       return &elf_howto_table[(int) R_390_TLS_LDCALL];
 297     case BFD_RELOC_390_TLS_GD32:
 298       return &elf_howto_table[(int) R_390_TLS_GD32];
 299     case BFD_RELOC_390_TLS_GOTIE12:
 300       return &elf_howto_table[(int) R_390_TLS_GOTIE12];
 301     case BFD_RELOC_390_TLS_GOTIE32:
 302       return &elf_howto_table[(int) R_390_TLS_GOTIE32];
 303     case BFD_RELOC_390_TLS_LDM32:
 304       return &elf_howto_table[(int) R_390_TLS_LDM32];
 305     case BFD_RELOC_390_TLS_IE32:
 306       return &elf_howto_table[(int) R_390_TLS_IE32];
 307     case BFD_RELOC_390_TLS_IEENT:
 308       return &elf_howto_table[(int) R_390_TLS_IEENT];
 309     case BFD_RELOC_390_TLS_LE32:
 310       return &elf_howto_table[(int) R_390_TLS_LE32];
 311     case BFD_RELOC_390_TLS_LDO32:
 312       return &elf_howto_table[(int) R_390_TLS_LDO32];
 313     case BFD_RELOC_390_TLS_DTPMOD:
 314       return &elf_howto_table[(int) R_390_TLS_DTPMOD];
 315     case BFD_RELOC_390_TLS_DTPOFF:
 316       return &elf_howto_table[(int) R_390_TLS_DTPOFF];
 317     case BFD_RELOC_390_TLS_TPOFF:
 318       return &elf_howto_table[(int) R_390_TLS_TPOFF];
 319     case BFD_RELOC_390_20:
 320       return &elf_howto_table[(int) R_390_20];
 321     case BFD_RELOC_390_GOT20:
 322       return &elf_howto_table[(int) R_390_GOT20];
 323     case BFD_RELOC_390_GOTPLT20:
 324       return &elf_howto_table[(int) R_390_GOTPLT20];
 325     case BFD_RELOC_390_TLS_GOTIE20:
 326       return &elf_howto_table[(int) R_390_TLS_GOTIE20];
 327     case BFD_RELOC_VTABLE_INHERIT:
 328       return &elf32_s390_vtinherit_howto;
 329     case BFD_RELOC_VTABLE_ENTRY:
 330       return &elf32_s390_vtentry_howto;
 331     default:
 332       break;
 333     }
 334   return 0;
 335 }
 336
 337 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
 338    and elf32-s390.c has its own copy.  */
 339
 340 static void
 341 elf_s390_info_to_howto (abfd, cache_ptr, dst)
 342      bfd *abfd ATTRIBUTE_UNUSED;
 343      arelent *cache_ptr;
 344      Elf_Internal_Rela *dst;
 345 {
 346   unsigned int r_type = ELF32_R_TYPE(dst->r_info);
 347   switch (r_type)
 348     {
 349     case R_390_GNU_VTINHERIT:
 350       cache_ptr->howto = &elf32_s390_vtinherit_howto;
 351       break;
 352
 353     case R_390_GNU_VTENTRY:
 354       cache_ptr->howto = &elf32_s390_vtentry_howto;
 355       break;
 356
 357     default:
 358       if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
 359         {
 360           (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
 361                                  abfd, (int) r_type);
 362           r_type = R_390_NONE;
 363         }
 364       cache_ptr->howto = &elf_howto_table[r_type];
 365     }
 366 }
 367
 368 /* A relocation function which doesn't do anything.  */
 369 static bfd_reloc_status_type
 370 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
 371                 output_bfd, error_message)
 372      bfd *abfd ATTRIBUTE_UNUSED;
 373      arelent *reloc_entry;
 374      asymbol *symbol ATTRIBUTE_UNUSED;
 375      PTR data ATTRIBUTE_UNUSED;
 376      asection *input_section;
 377      bfd *output_bfd;
 378      char **error_message ATTRIBUTE_UNUSED;
 379 {
 380   if (output_bfd)
 381     reloc_entry->address += input_section->output_offset;
 382   return bfd_reloc_ok;
 383 }
 384
 385 /* Handle the large displacement relocs.  */
 386 static bfd_reloc_status_type
 387 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
 388                       output_bfd, error_message)
 389      bfd *abfd ATTRIBUTE_UNUSED;
 390      arelent *reloc_entry;
 391      asymbol *symbol;
 392      PTR data ATTRIBUTE_UNUSED;
 393      asection *input_section;
 394      bfd *output_bfd;
 395      char **error_message ATTRIBUTE_UNUSED;
 396 {
 397   reloc_howto_type *howto = reloc_entry->howto;
 398   bfd_vma relocation;
 399   bfd_vma insn;
 400
 401   if (output_bfd != (bfd *) NULL
 402       && (symbol->flags & BSF_SECTION_SYM) == 0
 403       && (! howto->partial_inplace
 404           || reloc_entry->addend == 0))
 405     {
 406       reloc_entry->address += input_section->output_offset;
 407       return bfd_reloc_ok;
 408     }
 409
 410   if (output_bfd != NULL)
 411     return bfd_reloc_continue;
 412
 413   if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
 414     return bfd_reloc_outofrange;
 415
 416   relocation = (symbol->value
 417                 + symbol->section->output_section->vma
 418                 + symbol->section->output_offset);
 419   relocation += reloc_entry->addend;
 420   if (howto->pc_relative)
 421     {
 422       relocation -= (input_section->output_section->vma
 423                      + input_section->output_offset);
 424       relocation -= reloc_entry->address;
 425     }
 426
 427   insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
 428   insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
 429   bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
 430
 431   if ((bfd_signed_vma) relocation < - 0x80000
 432       || (bfd_signed_vma) relocation > 0x7ffff)
 433     return bfd_reloc_overflow;
 434   else
 435     return bfd_reloc_ok;
 436 }
 437
 438 static bfd_boolean
 439 elf_s390_is_local_label_name (abfd, name)
 440      bfd *abfd;
 441      const char *name;
 442 {
 443   if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
 444     return TRUE;
 445
 446   return _bfd_elf_is_local_label_name (abfd, name);
 447 }
 448
 449 /* Functions for the 390 ELF linker.  */
 450
 451 /* The name of the dynamic interpreter.  This is put in the .interp
 452    section.  */
 453
 454 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
 455
 456 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
 457    copying dynamic variables from a shared lib into an app's dynbss
 458    section, and instead use a dynamic relocation to point into the
 459    shared lib.  */
 460 #define ELIMINATE_COPY_RELOCS 1
 461
 462 /* The size in bytes of the first entry in the procedure linkage table.  */
 463 #define PLT_FIRST_ENTRY_SIZE 32
 464 /* The size in bytes of an entry in the procedure linkage table.  */
 465 #define PLT_ENTRY_SIZE 32
 466
 467 #define GOT_ENTRY_SIZE 4
 468
 469 /* The first three entries in a procedure linkage table are reserved,
 470    and the initial contents are unimportant (we zero them out).
 471    Subsequent entries look like this.  See the SVR4 ABI 386
 472    supplement to see how this works.  */
 473
 474 /* For the s390, simple addr offset can only be 0 - 4096.
 475    To use the full 2 GB address space, several instructions
 476    are needed to load an address in a register and execute
 477    a branch( or just saving the address)
 478
 479    Furthermore, only r 0 and 1 are free to use!!!  */
 480
 481 /* The first 3 words in the GOT are then reserved.
 482    Word 0 is the address of the dynamic table.
 483    Word 1 is a pointer to a structure describing the object
 484    Word 2 is used to point to the loader entry address.
 485
 486    The code for position independent PLT entries looks like this:
 487
 488    r12 holds addr of the current GOT at entry to the PLT
 489
 490    The GOT holds the address in the PLT to be executed.
 491    The loader then gets:
 492    24(15) =  Pointer to the structure describing the object.
 493    28(15) =  Offset in symbol table
 494
 495    The loader  must  then find the module where the function is
 496    and insert the address in the GOT.
 497
 498   Note: 390 can only address +- 64 K relative.
 499         We check if offset > 65536, then make a relative branch -64xxx
 500         back to a previous defined branch
 501
 502 PLT1: BASR 1,0         # 2 bytes
 503       L    1,22(1)     # 4 bytes  Load offset in GOT in r 1
 504       L    1,(1,12)    # 4 bytes  Load address from GOT in r1
 505       BCR  15,1        # 2 bytes  Jump to address
 506 RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
 507       L    1,14(1)     # 4 bytes  Load offset in symol table in r1
 508       BRC  15,-x       # 4 bytes  Jump to start of PLT
 509       .word 0          # 2 bytes filler
 510       .long ?          # 4 bytes  offset in GOT
 511       .long ?          # 4 bytes  offset into symbol table
 512
 513   This was the general case. There are two additional, optimizes PLT
 514   definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
 515   First the one for GOT offsets < 4096:
 516
 517 PLT1: L    1,<offset>(12) # 4 bytes  Load address from GOT in R1
 518       BCR  15,1           # 2 bytes  Jump to address
 519       .word 0,0,0         # 6 bytes  filler
 520 RET1: BASR 1,0            # 2 bytes  Return from GOT 1st time
 521       L    1,14(1)        # 4 bytes  Load offset in symbol table in r1
 522       BRC  15,-x          # 4 bytes  Jump to start of PLT
 523       .word 0,0,0         # 6 bytes  filler
 524       .long ?             # 4 bytes  offset into symbol table
 525
 526   Second the one for GOT offsets < 32768:
 527
 528 PLT1: LHI  1,<offset>     # 4 bytes  Load offset in GOT to r1
 529       L    1,(1,12)       # 4 bytes  Load address from GOT to r1
 530       BCR  15,1           # 2 bytes  Jump to address
 531       .word 0             # 2 bytes  filler
 532 RET1: BASR 1,0            # 2 bytes  Return from GOT 1st time
 533       L    1,14(1)        # 4 bytes  Load offset in symbol table in r1
 534       BRC  15,-x          # 4 bytes  Jump to start of PLT
 535       .word 0,0,0         # 6 bytes  filler
 536       .long ?             # 4 bytes  offset into symbol table
 537
 538 Total = 32 bytes per PLT entry
 539
 540    The code for static build PLT entries looks like this:
 541
 542 PLT1: BASR 1,0         # 2 bytes
 543       L    1,22(1)     # 4 bytes  Load address of GOT entry
 544       L    1,0(0,1)    # 4 bytes  Load address from GOT in r1
 545       BCR  15,1        # 2 bytes  Jump to address
 546 RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
 547       L    1,14(1)     # 4 bytes  Load offset in symbol table in r1
 548       BRC  15,-x       # 4 bytes  Jump to start of PLT
 549       .word 0          # 2 bytes  filler
 550       .long ?          # 4 bytes  address of GOT entry
 551       .long ?          # 4 bytes  offset into symbol table  */
 552
 553 #define PLT_PIC_ENTRY_WORD0 0x0d105810
 554 #define PLT_PIC_ENTRY_WORD1 0x10165811
 555 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
 556 #define PLT_PIC_ENTRY_WORD3 0x0d105810
 557 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
 558
 559 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
 560 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
 561 #define PLT_PIC12_ENTRY_WORD2 0x00000000
 562 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
 563 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
 564
 565 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
 566 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
 567 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
 568 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
 569 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
 570
 571 #define PLT_ENTRY_WORD0     0x0d105810
 572 #define PLT_ENTRY_WORD1     0x10165810
 573 #define PLT_ENTRY_WORD2     0x100007f1
 574 #define PLT_ENTRY_WORD3     0x0d105810
 575 #define PLT_ENTRY_WORD4     0x100ea7f4
 576
 577 /* The first PLT entry pushes the offset into the symbol table
 578    from R1 onto the stack at 8(15) and the loader object info
 579    at 12(15), loads the loader address in R1 and jumps to it.  */
 580
 581 /* The first entry in the PLT for PIC code:
 582
 583 PLT0:
 584    ST   1,28(15)  # R1 has offset into symbol table
 585    L    1,4(12)   # Get loader ino(object struct address)
 586    ST   1,24(15)  # Store address
 587    L    1,8(12)   # Entry address of loader in R1
 588    BR   1         # Jump to loader
 589
 590    The first entry in the PLT for static code:
 591
 592 PLT0:
 593    ST   1,28(15)      # R1 has offset into symbol table
 594    BASR 1,0
 595    L    1,18(0,1)     # Get address of GOT
 596    MVC  24(4,15),4(1) # Move loader ino to stack
 597    L    1,8(1)        # Get address of loader
 598    BR   1             # Jump to loader
 599    .word 0            # filler
 600    .long got          # address of GOT  */
 601
 602 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
 603 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
 604 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
 605 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
 606 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
 607
 608 #define PLT_FIRST_ENTRY_WORD0     0x5010f01c
 609 #define PLT_FIRST_ENTRY_WORD1     0x0d105810
 610 #define PLT_FIRST_ENTRY_WORD2     0x1012D203
 611 #define PLT_FIRST_ENTRY_WORD3     0xf0181004
 612 #define PLT_FIRST_ENTRY_WORD4     0x58101008
 613 #define PLT_FIRST_ENTRY_WORD5     0x07f10000
 614
 615 /* The s390 linker needs to keep track of the number of relocs that it
 616    decides to copy as dynamic relocs in check_relocs for each symbol.
 617    This is so that it can later discard them if they are found to be
 618    unnecessary.  We store the information in a field extending the
 619    regular ELF linker hash table.  */
 620
 621 struct elf_s390_dyn_relocs
 622 {
 623   struct elf_s390_dyn_relocs *next;
 624
 625   /* The input section of the reloc.  */
 626   asection *sec;
 627
 628   /* Total number of relocs copied for the input section.  */
 629   bfd_size_type count;
 630
 631   /* Number of pc-relative relocs copied for the input section.  */
 632   bfd_size_type pc_count;
 633 };
 634
 635 /* s390 ELF linker hash entry.  */
 636
 637 struct elf_s390_link_hash_entry
 638 {
 639   struct elf_link_hash_entry elf;
 640
 641   /* Track dynamic relocs copied for this symbol.  */
 642   struct elf_s390_dyn_relocs *dyn_relocs;
 643
 644   /* Number of GOTPLT references for a function.  */
 645   bfd_signed_vma gotplt_refcount;
 646
 647 #define GOT_UNKNOWN     0
 648 #define GOT_NORMAL      1
 649 #define GOT_TLS_GD      2
 650 #define GOT_TLS_IE      3
 651 #define GOT_TLS_IE_NLT  4
 652   unsigned char tls_type;
 653 };
 654
 655 #define elf_s390_hash_entry(ent) \
 656   ((struct elf_s390_link_hash_entry *)(ent))
 657
 658 struct elf_s390_obj_tdata
 659 {
 660   struct elf_obj_tdata root;
 661
 662   /* tls_type for each local got entry.  */
 663   char *local_got_tls_type;
 664 };
 665
 666 #define elf_s390_tdata(abfd) \
 667   ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
 668
 669 #define elf_s390_local_got_tls_type(abfd) \
 670   (elf_s390_tdata (abfd)->local_got_tls_type)
 671
 672 static bfd_boolean
 673 elf_s390_mkobject (bfd *abfd)
 674 {
 675   if (abfd->tdata.any == NULL)
 676     {
 677       bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
 678       abfd->tdata.any = bfd_zalloc (abfd, amt);
 679       if (abfd->tdata.any == NULL)
 680         return FALSE;
 681     }
 682   return bfd_elf_mkobject (abfd);
 683 }
 684
 685 static bfd_boolean
 686 elf_s390_object_p (abfd)
 687      bfd *abfd;
 688 {
 689   /* Set the right machine number for an s390 elf32 file.  */
 690   return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
 691 }
 692
 693 /* s390 ELF linker hash table.  */
 694
 695 struct elf_s390_link_hash_table
 696 {
 697   struct elf_link_hash_table elf;
 698
 699   /* Short-cuts to get to dynamic linker sections.  */
 700   asection *sgot;
 701   asection *sgotplt;
 702   asection *srelgot;
 703   asection *splt;
 704   asection *srelplt;
 705   asection *sdynbss;
 706   asection *srelbss;
 707
 708   union {
 709     bfd_signed_vma refcount;
 710     bfd_vma offset;
 711   } tls_ldm_got;
 712
 713   /* Small local sym to section mapping cache.  */
 714   struct sym_sec_cache sym_sec;
 715 };
 716
 717 /* Get the s390 ELF linker hash table from a link_info structure.  */
 718
 719 #define elf_s390_hash_table(p) \
 720   ((struct elf_s390_link_hash_table *) ((p)->hash))
 721
 722 /* Create an entry in an s390 ELF linker hash table.  */
 723
 724 static struct bfd_hash_entry *
 725 link_hash_newfunc (entry, table, string)
 726      struct bfd_hash_entry *entry;
 727      struct bfd_hash_table *table;
 728      const char *string;
 729 {
 730   /* Allocate the structure if it has not already been allocated by a
 731      subclass.  */
 732   if (entry == NULL)
 733     {
 734       entry = bfd_hash_allocate (table,
 735                                  sizeof (struct elf_s390_link_hash_entry));
 736       if (entry == NULL)
 737         return entry;
 738     }
 739
 740   /* Call the allocation method of the superclass.  */
 741   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 742   if (entry != NULL)
 743     {
 744       struct elf_s390_link_hash_entry *eh;
 745
 746       eh = (struct elf_s390_link_hash_entry *) entry;
 747       eh->dyn_relocs = NULL;
 748       eh->gotplt_refcount = 0;
 749       eh->tls_type = GOT_UNKNOWN;
 750     }
 751
 752   return entry;
 753 }
 754
 755 /* Create an s390 ELF linker hash table.  */
 756
 757 static struct bfd_link_hash_table *
 758 elf_s390_link_hash_table_create (abfd)
 759      bfd *abfd;
 760 {
 761   struct elf_s390_link_hash_table *ret;
 762   bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
 763
 764   ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
 765   if (ret == NULL)
 766     return NULL;
 767
 768   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
 769                                       sizeof (struct elf_s390_link_hash_entry)))
 770     {
 771       free (ret);
 772       return NULL;
 773     }
 774
 775   ret->sgot = NULL;
 776   ret->sgotplt = NULL;
 777   ret->srelgot = NULL;
 778   ret->splt = NULL;
 779   ret->srelplt = NULL;
 780   ret->sdynbss = NULL;
 781   ret->srelbss = NULL;
 782   ret->tls_ldm_got.refcount = 0;
 783   ret->sym_sec.abfd = NULL;
 784
 785   return &ret->elf.root;
 786 }
 787
 788 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
 789    shortcuts to them in our hash table.  */
 790
 791 static bfd_boolean
 792 create_got_section (dynobj, info)
 793      bfd *dynobj;
 794      struct bfd_link_info *info;
 795 {
 796   struct elf_s390_link_hash_table *htab;
 797
 798   if (! _bfd_elf_create_got_section (dynobj, info))
 799     return FALSE;
 800
 801   htab = elf_s390_hash_table (info);
 802   htab->sgot = bfd_get_section_by_name (dynobj, ".got");
 803   htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
 804   if (!htab->sgot || !htab->sgotplt)
 805     abort ();
 806
 807   htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
 808                                                (SEC_ALLOC | SEC_LOAD
 809                                                 | SEC_HAS_CONTENTS
 810                                                 | SEC_IN_MEMORY
 811                                                 | SEC_LINKER_CREATED
 812                                                 | SEC_READONLY));
 813   if (htab->srelgot == NULL
 814       || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
 815     return FALSE;
 816   return TRUE;
 817 }
 818
 819 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
 820    .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
 821    hash table.  */
 822
 823 static bfd_boolean
 824 elf_s390_create_dynamic_sections (dynobj, info)
 825      bfd *dynobj;
 826      struct bfd_link_info *info;
 827 {
 828   struct elf_s390_link_hash_table *htab;
 829
 830   htab = elf_s390_hash_table (info);
 831   if (!htab->sgot && !create_got_section (dynobj, info))
 832     return FALSE;
 833
 834   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
 835     return FALSE;
 836
 837   htab->splt = bfd_get_section_by_name (dynobj, ".plt");
 838   htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
 839   htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
 840   if (!info->shared)
 841     htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
 842
 843   if (!htab->splt || !htab->srelplt || !htab->sdynbss
 844       || (!info->shared && !htab->srelbss))
 845     abort ();
 846
 847   return TRUE;
 848 }
 849
 850 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 851
 852 static void
 853 elf_s390_copy_indirect_symbol (info, dir, ind)
 854      struct bfd_link_info *info;
 855      struct elf_link_hash_entry *dir, *ind;
 856 {
 857   struct elf_s390_link_hash_entry *edir, *eind;
 858
 859   edir = (struct elf_s390_link_hash_entry *) dir;
 860   eind = (struct elf_s390_link_hash_entry *) ind;
 861
 862   if (eind->dyn_relocs != NULL)
 863     {
 864       if (edir->dyn_relocs != NULL)
 865         {
 866           struct elf_s390_dyn_relocs **pp;
 867           struct elf_s390_dyn_relocs *p;
 868
 869           /* Add reloc counts against the indirect sym to the direct sym
 870              list.  Merge any entries against the same section.  */
 871           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 872             {
 873               struct elf_s390_dyn_relocs *q;
 874
 875               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 876                 if (q->sec == p->sec)
 877                   {
 878                     q->pc_count += p->pc_count;
 879                     q->count += p->count;
 880                     *pp = p->next;
 881                     break;
 882                   }
 883               if (q == NULL)
 884                 pp = &p->next;
 885             }
 886           *pp = edir->dyn_relocs;
 887         }
 888
 889       edir->dyn_relocs = eind->dyn_relocs;
 890       eind->dyn_relocs = NULL;
 891     }
 892
 893   if (ind->root.type == bfd_link_hash_indirect
 894       && dir->got.refcount <= 0)
 895     {
 896       edir->tls_type = eind->tls_type;
 897       eind->tls_type = GOT_UNKNOWN;
 898     }
 899
 900   if (ELIMINATE_COPY_RELOCS
 901       && ind->root.type != bfd_link_hash_indirect
 902       && dir->dynamic_adjusted)
 903     {
 904       /* If called to transfer flags for a weakdef during processing
 905          of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 906          We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 907       dir->ref_dynamic |= ind->ref_dynamic;
 908       dir->ref_regular |= ind->ref_regular;
 909       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
 910       dir->needs_plt |= ind->needs_plt;
 911     }
 912   else
 913     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 914 }
 915
 916 static int
 917 elf_s390_tls_transition (info, r_type, is_local)
 918      struct bfd_link_info *info;
 919      int r_type;
 920      int is_local;
 921 {
 922   if (info->shared)
 923     return r_type;
 924
 925   switch (r_type)
 926     {
 927     case R_390_TLS_GD32:
 928     case R_390_TLS_IE32:
 929       if (is_local)
 930         return R_390_TLS_LE32;
 931       return R_390_TLS_IE32;
 932     case R_390_TLS_GOTIE32:
 933       if (is_local)
 934         return R_390_TLS_LE32;
 935       return R_390_TLS_GOTIE32;
 936     case R_390_TLS_LDM32:
 937       return R_390_TLS_LE32;
 938     }
 939
 940   return r_type;
 941 }
 942
 943 /* Look through the relocs for a section during the first phase, and
 944    allocate space in the global offset table or procedure linkage
 945    table.  */
 946
 947 static bfd_boolean
 948 elf_s390_check_relocs (abfd, info, sec, relocs)
 949      bfd *abfd;
 950      struct bfd_link_info *info;
 951      asection *sec;
 952      const Elf_Internal_Rela *relocs;
 953 {
 954   struct elf_s390_link_hash_table *htab;
 955   Elf_Internal_Shdr *symtab_hdr;
 956   struct elf_link_hash_entry **sym_hashes;
 957   const Elf_Internal_Rela *rel;
 958   const Elf_Internal_Rela *rel_end;
 959   asection *sreloc;
 960   bfd_signed_vma *local_got_refcounts;
 961   int tls_type, old_tls_type;
 962
 963   if (info->relocatable)
 964     return TRUE;
 965
 966   htab = elf_s390_hash_table (info);
 967   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
 968   sym_hashes = elf_sym_hashes (abfd);
 969   local_got_refcounts = elf_local_got_refcounts (abfd);
 970
 971   sreloc = NULL;
 972
 973   rel_end = relocs + sec->reloc_count;
 974   for (rel = relocs; rel < rel_end; rel++)
 975     {
 976       unsigned int r_type;
 977       unsigned long r_symndx;
 978       struct elf_link_hash_entry *h;
 979
 980       r_symndx = ELF32_R_SYM (rel->r_info);
 981
 982       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
 983         {
 984           (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
 985                                  abfd, r_symndx);
 986           return FALSE;
 987         }
 988
 989       if (r_symndx < symtab_hdr->sh_info)
 990         h = NULL;
 991       else
 992         {
 993           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
 994           while (h->root.type == bfd_link_hash_indirect
 995                  || h->root.type == bfd_link_hash_warning)
 996             h = (struct elf_link_hash_entry *) h->root.u.i.link;
 997         }
 998
 999       /* Create got section and local_got_refcounts array if they
1000          are needed.  */
1001       r_type = elf_s390_tls_transition (info,
1002                                         ELF32_R_TYPE (rel->r_info),
1003                                         h == NULL);
1004       switch (r_type)
1005         {
1006         case R_390_GOT12:
1007         case R_390_GOT16:
1008         case R_390_GOT20:
1009         case R_390_GOT32:
1010         case R_390_GOTENT:
1011         case R_390_GOTPLT12:
1012         case R_390_GOTPLT16:
1013         case R_390_GOTPLT20:
1014         case R_390_GOTPLT32:
1015         case R_390_GOTPLTENT:
1016         case R_390_TLS_GD32:
1017         case R_390_TLS_GOTIE12:
1018         case R_390_TLS_GOTIE20:
1019         case R_390_TLS_GOTIE32:
1020         case R_390_TLS_IEENT:
1021         case R_390_TLS_IE32:
1022         case R_390_TLS_LDM32:
1023           if (h == NULL
1024               && local_got_refcounts == NULL)
1025             {
1026               bfd_size_type size;
1027
1028               size = symtab_hdr->sh_info;
1029               size *= (sizeof (bfd_signed_vma) + sizeof(char));
1030               local_got_refcounts = ((bfd_signed_vma *)
1031                                      bfd_zalloc (abfd, size));
1032               if (local_got_refcounts == NULL)
1033                 return FALSE;
1034               elf_local_got_refcounts (abfd) = local_got_refcounts;
1035               elf_s390_local_got_tls_type (abfd)
1036                 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1037             }
1038           /* Fall through.  */
1039         case R_390_GOTOFF16:
1040         case R_390_GOTOFF32:
1041         case R_390_GOTPC:
1042         case R_390_GOTPCDBL:
1043           if (htab->sgot == NULL)
1044             {
1045               if (htab->elf.dynobj == NULL)
1046                 htab->elf.dynobj = abfd;
1047               if (!create_got_section (htab->elf.dynobj, info))
1048                 return FALSE;
1049             }
1050         }
1051
1052       switch (r_type)
1053         {
1054         case R_390_GOTOFF16:
1055         case R_390_GOTOFF32:
1056         case R_390_GOTPC:
1057         case R_390_GOTPCDBL:
1058           /* Got is created, nothing to be done.  */
1059           break;
1060
1061         case R_390_PLT16DBL:
1062         case R_390_PLT32DBL:
1063         case R_390_PLT32:
1064         case R_390_PLTOFF16:
1065         case R_390_PLTOFF32:
1066           /* This symbol requires a procedure linkage table entry.  We
1067              actually build the entry in adjust_dynamic_symbol,
1068              because this might be a case of linking PIC code which is
1069              never referenced by a dynamic object, in which case we
1070              don't need to generate a procedure linkage table entry
1071              after all.  */
1072
1073           /* If this is a local symbol, we resolve it directly without
1074              creating a procedure linkage table entry.  */
1075           if (h != NULL)
1076             {
1077               h->needs_plt = 1;
1078               h->plt.refcount += 1;
1079             }
1080           break;
1081
1082         case R_390_GOTPLT12:
1083         case R_390_GOTPLT16:
1084         case R_390_GOTPLT20:
1085         case R_390_GOTPLT32:
1086         case R_390_GOTPLTENT:
1087           /* This symbol requires either a procedure linkage table entry
1088              or an entry in the local got. We actually build the entry
1089              in adjust_dynamic_symbol because whether this is really a
1090              global reference can change and with it the fact if we have
1091              to create a plt entry or a local got entry. To be able to
1092              make a once global symbol a local one we have to keep track
1093              of the number of gotplt references that exist for this
1094              symbol.  */
1095           if (h != NULL)
1096             {
1097               ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1098               h->needs_plt = 1;
1099               h->plt.refcount += 1;
1100             }
1101           else
1102             local_got_refcounts[r_symndx] += 1;
1103           break;
1104
1105         case R_390_TLS_LDM32:
1106           htab->tls_ldm_got.refcount += 1;
1107           break;
1108
1109         case R_390_TLS_IE32:
1110         case R_390_TLS_GOTIE12:
1111         case R_390_TLS_GOTIE20:
1112         case R_390_TLS_GOTIE32:
1113         case R_390_TLS_IEENT:
1114           if (info->shared)
1115             info->flags |= DF_STATIC_TLS;
1116           /* Fall through.  */
1117
1118         case R_390_GOT12:
1119         case R_390_GOT16:
1120         case R_390_GOT20:
1121         case R_390_GOT32:
1122         case R_390_GOTENT:
1123         case R_390_TLS_GD32:
1124           /* This symbol requires a global offset table entry.  */
1125           switch (r_type)
1126             {
1127             default:
1128             case R_390_GOT12:
1129             case R_390_GOT16:
1130             case R_390_GOT20:
1131             case R_390_GOT32:
1132             case R_390_GOTENT:
1133               tls_type = GOT_NORMAL;
1134               break;
1135             case R_390_TLS_GD32:
1136               tls_type = GOT_TLS_GD;
1137               break;
1138             case R_390_TLS_IE32:
1139             case R_390_TLS_GOTIE32:
1140               tls_type = GOT_TLS_IE;
1141               break;
1142             case R_390_TLS_GOTIE12:
1143             case R_390_TLS_GOTIE20:
1144             case R_390_TLS_IEENT:
1145               tls_type = GOT_TLS_IE_NLT;
1146               break;
1147             }
1148
1149           if (h != NULL)
1150             {
1151               h->got.refcount += 1;
1152               old_tls_type = elf_s390_hash_entry(h)->tls_type;
1153             }
1154           else
1155             {
1156               local_got_refcounts[r_symndx] += 1;
1157               old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1158             }
1159           /* If a TLS symbol is accessed using IE at least once,
1160              there is no point to use dynamic model for it.  */
1161           if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1162             {
1163               if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1164                 {
1165                   (*_bfd_error_handler)
1166                     (_("%B: `%s' accessed both as normal and thread local symbol"),
1167                      abfd, h->root.root.string);
1168                   return FALSE;
1169                 }
1170               if (old_tls_type > tls_type)
1171                 tls_type = old_tls_type;
1172             }
1173
1174           if (old_tls_type != tls_type)
1175             {
1176               if (h != NULL)
1177                 elf_s390_hash_entry (h)->tls_type = tls_type;
1178               else
1179                 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1180             }
1181
1182           if (r_type != R_390_TLS_IE32)
1183             break;
1184           /* Fall through.  */
1185
1186         case R_390_TLS_LE32:
1187           if (!info->shared)
1188             break;
1189           info->flags |= DF_STATIC_TLS;
1190           /* Fall through.  */
1191
1192         case R_390_8:
1193         case R_390_16:
1194         case R_390_32:
1195         case R_390_PC16:
1196         case R_390_PC16DBL:
1197         case R_390_PC32DBL:
1198         case R_390_PC32:
1199           if (h != NULL && !info->shared)
1200             {
1201               /* If this reloc is in a read-only section, we might
1202                  need a copy reloc.  We can't check reliably at this
1203                  stage whether the section is read-only, as input
1204                  sections have not yet been mapped to output sections.
1205                  Tentatively set the flag for now, and correct in
1206                  adjust_dynamic_symbol.  */
1207               h->non_got_ref = 1;
1208
1209               /* We may need a .plt entry if the function this reloc
1210                  refers to is in a shared lib.  */
1211               h->plt.refcount += 1;
1212             }
1213
1214           /* If we are creating a shared library, and this is a reloc
1215              against a global symbol, or a non PC relative reloc
1216              against a local symbol, then we need to copy the reloc
1217              into the shared library.  However, if we are linking with
1218              -Bsymbolic, we do not need to copy a reloc against a
1219              global symbol which is defined in an object we are
1220              including in the link (i.e., DEF_REGULAR is set).  At
1221              this point we have not seen all the input files, so it is
1222              possible that DEF_REGULAR is not set now but will be set
1223              later (it is never cleared).  In case of a weak definition,
1224              DEF_REGULAR may be cleared later by a strong definition in
1225              a shared library. We account for that possibility below by
1226              storing information in the relocs_copied field of the hash
1227              table entry.  A similar situation occurs when creating
1228              shared libraries and symbol visibility changes render the
1229              symbol local.
1230
1231              If on the other hand, we are creating an executable, we
1232              may need to keep relocations for symbols satisfied by a
1233              dynamic library if we manage to avoid copy relocs for the
1234              symbol.  */
1235           if ((info->shared
1236                && (sec->flags & SEC_ALLOC) != 0
1237                && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1238                     && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1239                     && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1240                     && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1241                    || (h != NULL
1242                        && (! info->symbolic
1243                            || h->root.type == bfd_link_hash_defweak
1244                            || !h->def_regular))))
1245               || (ELIMINATE_COPY_RELOCS
1246                   && !info->shared
1247                   && (sec->flags & SEC_ALLOC) != 0
1248                   && h != NULL
1249                   && (h->root.type == bfd_link_hash_defweak
1250                       || !h->def_regular)))
1251             {
1252               struct elf_s390_dyn_relocs *p;
1253               struct elf_s390_dyn_relocs **head;
1254
1255               /* We must copy these reloc types into the output file.
1256                  Create a reloc section in dynobj and make room for
1257                  this reloc.  */
1258               if (sreloc == NULL)
1259                 {
1260                   const char *name;
1261                   bfd *dynobj;
1262
1263                   name = (bfd_elf_string_from_elf_section
1264                           (abfd,
1265                            elf_elfheader (abfd)->e_shstrndx,
1266                            elf_section_data (sec)->rel_hdr.sh_name));
1267                   if (name == NULL)
1268                     return FALSE;
1269
1270                   if (! CONST_STRNEQ (name, ".rela")
1271                       || strcmp (bfd_get_section_name (abfd, sec),
1272                                  name + 5) != 0)
1273                     {
1274                       (*_bfd_error_handler)
1275                         (_("%B: bad relocation section name `%s\'"),
1276                          abfd, name);
1277                     }
1278
1279                   if (htab->elf.dynobj == NULL)
1280                     htab->elf.dynobj = abfd;
1281
1282                   dynobj = htab->elf.dynobj;
1283                   sreloc = bfd_get_section_by_name (dynobj, name);
1284                   if (sreloc == NULL)
1285                     {
1286                       flagword flags;
1287
1288                       flags = (SEC_HAS_CONTENTS | SEC_READONLY
1289                                | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1290                       if ((sec->flags & SEC_ALLOC) != 0)
1291                         flags |= SEC_ALLOC | SEC_LOAD;
1292                       sreloc = bfd_make_section_with_flags (dynobj,
1293                                                             name,
1294                                                             flags);
1295                       if (sreloc == NULL
1296                           || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1297                         return FALSE;
1298                     }
1299                   elf_section_data (sec)->sreloc = sreloc;
1300                 }
1301
1302               /* If this is a global symbol, we count the number of
1303                  relocations we need for this symbol.  */
1304               if (h != NULL)
1305                 {
1306                   head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1307                 }
1308               else
1309                 {
1310                   /* Track dynamic relocs needed for local syms too.
1311                      We really need local syms available to do this
1312                      easily.  Oh well.  */
1313                   asection *s;
1314                   void *vpp;
1315
1316                   s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1317                                                  sec, r_symndx);
1318                   if (s == NULL)
1319                     return FALSE;
1320
1321                   vpp = &elf_section_data (s)->local_dynrel;
1322                   head = (struct elf_s390_dyn_relocs **) vpp;
1323                 }
1324
1325               p = *head;
1326               if (p == NULL || p->sec != sec)
1327                 {
1328                   bfd_size_type amt = sizeof *p;
1329
1330                   p = ((struct elf_s390_dyn_relocs *)
1331                        bfd_alloc (htab->elf.dynobj, amt));
1332                   if (p == NULL)
1333                     return FALSE;
1334                   p->next = *head;
1335                   *head = p;
1336                   p->sec = sec;
1337                   p->count = 0;
1338                   p->pc_count = 0;
1339                 }
1340
1341               p->count += 1;
1342               if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1343                   || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1344                   || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1345                   || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1346                 p->pc_count += 1;
1347             }
1348           break;
1349
1350           /* This relocation describes the C++ object vtable hierarchy.
1351              Reconstruct it for later use during GC.  */
1352         case R_390_GNU_VTINHERIT:
1353           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1354             return FALSE;
1355           break;
1356
1357           /* This relocation describes which C++ vtable entries are actually
1358              used.  Record for later use during GC.  */
1359         case R_390_GNU_VTENTRY:
1360           if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1361             return FALSE;
1362           break;
1363
1364         default:
1365           break;
1366         }
1367     }
1368
1369   return TRUE;
1370 }
1371
1372 /* Return the section that should be marked against GC for a given
1373    relocation.  */
1374
1375 static asection *
1376 elf_s390_gc_mark_hook (asection *sec,
1377                        struct bfd_link_info *info,
1378                        Elf_Internal_Rela *rel,
1379                        struct elf_link_hash_entry *h,
1380                        Elf_Internal_Sym *sym)
1381 {
1382   if (h != NULL)
1383     switch (ELF32_R_TYPE (rel->r_info))
1384       {
1385       case R_390_GNU_VTINHERIT:
1386       case R_390_GNU_VTENTRY:
1387         return NULL;
1388       }
1389   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1390
1391 }
1392
1393 /* Update the got entry reference counts for the section being removed.  */
1394
1395 static bfd_boolean
1396 elf_s390_gc_sweep_hook (bfd *abfd,
1397                         struct bfd_link_info *info,
1398                         asection *sec,
1399                         const Elf_Internal_Rela *relocs)
1400 {
1401   Elf_Internal_Shdr *symtab_hdr;
1402   struct elf_link_hash_entry **sym_hashes;
1403   bfd_signed_vma *local_got_refcounts;
1404   const Elf_Internal_Rela *rel, *relend;
1405
1406   elf_section_data (sec)->local_dynrel = NULL;
1407
1408   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1409   sym_hashes = elf_sym_hashes (abfd);
1410   local_got_refcounts = elf_local_got_refcounts (abfd);
1411
1412   relend = relocs + sec->reloc_count;
1413   for (rel = relocs; rel < relend; rel++)
1414     {
1415       unsigned long r_symndx;
1416       unsigned int r_type;
1417       struct elf_link_hash_entry *h = NULL;
1418
1419       r_symndx = ELF32_R_SYM (rel->r_info);
1420       if (r_symndx >= symtab_hdr->sh_info)
1421         {
1422           struct elf_s390_link_hash_entry *eh;
1423           struct elf_s390_dyn_relocs **pp;
1424           struct elf_s390_dyn_relocs *p;
1425
1426           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1427           while (h->root.type == bfd_link_hash_indirect
1428                  || h->root.type == bfd_link_hash_warning)
1429             h = (struct elf_link_hash_entry *) h->root.u.i.link;
1430           eh = (struct elf_s390_link_hash_entry *) h;
1431
1432           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1433             if (p->sec == sec)
1434               {
1435                 /* Everything must go for SEC.  */
1436                 *pp = p->next;
1437                 break;
1438               }
1439         }
1440
1441       r_type = ELF32_R_TYPE (rel->r_info);
1442       r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1443       switch (r_type)
1444         {
1445         case R_390_TLS_LDM32:
1446           if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1447             elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1448           break;
1449
1450         case R_390_TLS_GD32:
1451         case R_390_TLS_IE32:
1452         case R_390_TLS_GOTIE12:
1453         case R_390_TLS_GOTIE20:
1454         case R_390_TLS_GOTIE32:
1455         case R_390_TLS_IEENT:
1456         case R_390_GOT12:
1457         case R_390_GOT16:
1458         case R_390_GOT20:
1459         case R_390_GOT32:
1460         case R_390_GOTOFF16:
1461         case R_390_GOTOFF32:
1462         case R_390_GOTPC:
1463         case R_390_GOTPCDBL:
1464         case R_390_GOTENT:
1465           if (h != NULL)
1466             {
1467               if (h->got.refcount > 0)
1468                 h->got.refcount -= 1;
1469             }
1470           else if (local_got_refcounts != NULL)
1471             {
1472               if (local_got_refcounts[r_symndx] > 0)
1473                 local_got_refcounts[r_symndx] -= 1;
1474             }
1475           break;
1476
1477         case R_390_8:
1478         case R_390_12:
1479         case R_390_16:
1480         case R_390_20:
1481         case R_390_32:
1482         case R_390_PC16:
1483         case R_390_PC16DBL:
1484         case R_390_PC32DBL:
1485         case R_390_PC32:
1486           if (info->shared)
1487             break;
1488           /* Fall through.  */
1489
1490         case R_390_PLT16DBL:
1491         case R_390_PLT32DBL:
1492         case R_390_PLT32:
1493         case R_390_PLTOFF16:
1494         case R_390_PLTOFF32:
1495           if (h != NULL)
1496             {
1497               if (h->plt.refcount > 0)
1498                 h->plt.refcount -= 1;
1499             }
1500           break;
1501
1502         case R_390_GOTPLT12:
1503         case R_390_GOTPLT16:
1504         case R_390_GOTPLT20:
1505         case R_390_GOTPLT32:
1506         case R_390_GOTPLTENT:
1507           if (h != NULL)
1508             {
1509               if (h->plt.refcount > 0)
1510                 {
1511                   ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1512                   h->plt.refcount -= 1;
1513                 }
1514             }
1515           else if (local_got_refcounts != NULL)
1516             {
1517               if (local_got_refcounts[r_symndx] > 0)
1518                 local_got_refcounts[r_symndx] -= 1;
1519             }
1520           break;
1521
1522         default:
1523           break;
1524         }
1525     }
1526
1527   return TRUE;
1528 }
1529
1530 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1531    entry but we found we will not create any.  Called when we find we will
1532    not have any PLT for this symbol, by for example
1533    elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1534    or elf_s390_size_dynamic_sections if no dynamic sections will be
1535    created (we're only linking static objects).  */
1536
1537 static void
1538 elf_s390_adjust_gotplt (h)
1539      struct elf_s390_link_hash_entry *h;
1540 {
1541   if (h->elf.root.type == bfd_link_hash_warning)
1542     h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1543
1544   if (h->gotplt_refcount <= 0)
1545     return;
1546
1547   /* We simply add the number of gotplt references to the number
1548    * of got references for this symbol.  */
1549   h->elf.got.refcount += h->gotplt_refcount;
1550   h->gotplt_refcount = -1;
1551 }
1552
1553 /* Adjust a symbol defined by a dynamic object and referenced by a
1554    regular object.  The current definition is in some section of the
1555    dynamic object, but we're not including those sections.  We have to
1556    change the definition to something the rest of the link can
1557    understand.  */
1558
1559 static bfd_boolean
1560 elf_s390_adjust_dynamic_symbol (info, h)
1561      struct bfd_link_info *info;
1562      struct elf_link_hash_entry *h;
1563 {
1564   struct elf_s390_link_hash_table *htab;
1565   asection *s;
1566   unsigned int power_of_two;
1567
1568   /* If this is a function, put it in the procedure linkage table.  We
1569      will fill in the contents of the procedure linkage table later
1570      (although we could actually do it here).  */
1571   if (h->type == STT_FUNC
1572       || h->needs_plt)
1573     {
1574       if (h->plt.refcount <= 0
1575           || (! info->shared
1576               && !h->def_dynamic
1577               && !h->ref_dynamic
1578               && h->root.type != bfd_link_hash_undefweak
1579               && h->root.type != bfd_link_hash_undefined))
1580         {
1581           /* This case can occur if we saw a PLT32 reloc in an input
1582              file, but the symbol was never referred to by a dynamic
1583              object, or if all references were garbage collected.  In
1584              such a case, we don't actually need to build a procedure
1585              linkage table, and we can just do a PC32 reloc instead.  */
1586           h->plt.offset = (bfd_vma) -1;
1587           h->needs_plt = 0;
1588           elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1589         }
1590
1591       return TRUE;
1592     }
1593   else
1594     /* It's possible that we incorrectly decided a .plt reloc was
1595        needed for an R_390_PC32 reloc to a non-function sym in
1596        check_relocs.  We can't decide accurately between function and
1597        non-function syms in check-relocs;  Objects loaded later in
1598        the link may change h->type.  So fix it now.  */
1599     h->plt.offset = (bfd_vma) -1;
1600
1601   /* If this is a weak symbol, and there is a real definition, the
1602      processor independent code will have arranged for us to see the
1603      real definition first, and we can just use the same value.  */
1604   if (h->u.weakdef != NULL)
1605     {
1606       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1607                   || h->u.weakdef->root.type == bfd_link_hash_defweak);
1608       h->root.u.def.section = h->u.weakdef->root.u.def.section;
1609       h->root.u.def.value = h->u.weakdef->root.u.def.value;
1610       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1611         h->non_got_ref = h->u.weakdef->non_got_ref;
1612       return TRUE;
1613     }
1614
1615   /* This is a reference to a symbol defined by a dynamic object which
1616      is not a function.  */
1617
1618   /* If we are creating a shared library, we must presume that the
1619      only references to the symbol are via the global offset table.
1620      For such cases we need not do anything here; the relocations will
1621      be handled correctly by relocate_section.  */
1622   if (info->shared)
1623     return TRUE;
1624
1625   /* If there are no references to this symbol that do not use the
1626      GOT, we don't need to generate a copy reloc.  */
1627   if (!h->non_got_ref)
1628     return TRUE;
1629
1630   /* If -z nocopyreloc was given, we won't generate them either.  */
1631   if (info->nocopyreloc)
1632     {
1633       h->non_got_ref = 0;
1634       return TRUE;
1635     }
1636
1637   if (ELIMINATE_COPY_RELOCS)
1638     {
1639       struct elf_s390_link_hash_entry * eh;
1640       struct elf_s390_dyn_relocs *p;
1641
1642       eh = (struct elf_s390_link_hash_entry *) h;
1643       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1644         {
1645           s = p->sec->output_section;
1646           if (s != NULL && (s->flags & SEC_READONLY) != 0)
1647             break;
1648         }
1649
1650       /* If we didn't find any dynamic relocs in read-only sections, then
1651          we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1652       if (p == NULL)
1653         {
1654           h->non_got_ref = 0;
1655           return TRUE;
1656         }
1657     }
1658
1659   if (h->size == 0)
1660     {
1661       (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1662                              h->root.root.string);
1663       return TRUE;
1664     }
1665
1666   /* We must allocate the symbol in our .dynbss section, which will
1667      become part of the .bss section of the executable.  There will be
1668      an entry for this symbol in the .dynsym section.  The dynamic
1669      object will contain position independent code, so all references
1670      from the dynamic object to this symbol will go through the global
1671      offset table.  The dynamic linker will use the .dynsym entry to
1672      determine the address it must put in the global offset table, so
1673      both the dynamic object and the regular object will refer to the
1674      same memory location for the variable.  */
1675
1676   htab = elf_s390_hash_table (info);
1677
1678   /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1679      copy the initial value out of the dynamic object and into the
1680      runtime process image.  */
1681   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1682     {
1683       htab->srelbss->size += sizeof (Elf32_External_Rela);
1684       h->needs_copy = 1;
1685     }
1686
1687   /* We need to figure out the alignment required for this symbol.  I
1688      have no idea how ELF linkers handle this.  */
1689   power_of_two = bfd_log2 (h->size);
1690   if (power_of_two > 3)
1691     power_of_two = 3;
1692
1693   /* Apply the required alignment.  */
1694   s = htab->sdynbss;
1695   s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1696   if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1697     {
1698       if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1699         return FALSE;
1700     }
1701
1702   /* Define the symbol as being at this point in the section.  */
1703   h->root.u.def.section = s;
1704   h->root.u.def.value = s->size;
1705
1706   /* Increment the section size to make room for the symbol.  */
1707   s->size += h->size;
1708
1709   return TRUE;
1710 }
1711
1712 /* Allocate space in .plt, .got and associated reloc sections for
1713    dynamic relocs.  */
1714
1715 static bfd_boolean
1716 allocate_dynrelocs (h, inf)
1717      struct elf_link_hash_entry *h;
1718      PTR inf;
1719 {
1720   struct bfd_link_info *info;
1721   struct elf_s390_link_hash_table *htab;
1722   struct elf_s390_link_hash_entry *eh;
1723   struct elf_s390_dyn_relocs *p;
1724
1725   if (h->root.type == bfd_link_hash_indirect)
1726     return TRUE;
1727
1728   if (h->root.type == bfd_link_hash_warning)
1729     /* When warning symbols are created, they **replace** the "real"
1730        entry in the hash table, thus we never get to see the real
1731        symbol in a hash traversal.  So look at it now.  */
1732     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1733
1734   info = (struct bfd_link_info *) inf;
1735   htab = elf_s390_hash_table (info);
1736
1737   if (htab->elf.dynamic_sections_created
1738       && h->plt.refcount > 0
1739       && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1740           || h->root.type != bfd_link_hash_undefweak))
1741     {
1742       /* Make sure this symbol is output as a dynamic symbol.
1743          Undefined weak syms won't yet be marked as dynamic.  */
1744       if (h->dynindx == -1
1745           && !h->forced_local)
1746         {
1747           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1748             return FALSE;
1749         }
1750
1751       if (info->shared
1752           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1753         {
1754           asection *s = htab->splt;
1755
1756           /* If this is the first .plt entry, make room for the special
1757              first entry.  */
1758           if (s->size == 0)
1759             s->size += PLT_FIRST_ENTRY_SIZE;
1760
1761           h->plt.offset = s->size;
1762
1763           /* If this symbol is not defined in a regular file, and we are
1764              not generating a shared library, then set the symbol to this
1765              location in the .plt.  This is required to make function
1766              pointers compare as equal between the normal executable and
1767              the shared library.  */
1768           if (! info->shared
1769               && !h->def_regular)
1770             {
1771               h->root.u.def.section = s;
1772               h->root.u.def.value = h->plt.offset;
1773             }
1774
1775           /* Make room for this entry.  */
1776           s->size += PLT_ENTRY_SIZE;
1777
1778           /* We also need to make an entry in the .got.plt section, which
1779              will be placed in the .got section by the linker script.  */
1780           htab->sgotplt->size += GOT_ENTRY_SIZE;
1781
1782           /* We also need to make an entry in the .rela.plt section.  */
1783           htab->srelplt->size += sizeof (Elf32_External_Rela);
1784         }
1785       else
1786         {
1787           h->plt.offset = (bfd_vma) -1;
1788           h->needs_plt = 0;
1789           elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1790         }
1791     }
1792   else
1793     {
1794       h->plt.offset = (bfd_vma) -1;
1795       h->needs_plt = 0;
1796       elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1797     }
1798
1799   /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1800      the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1801      to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1802      we can save the dynamic TLS relocation.  */
1803   if (h->got.refcount > 0
1804       && !info->shared
1805       && h->dynindx == -1
1806       && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1807     {
1808       if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1809         /* For the GOTIE access without a literal pool entry the offset has
1810            to be stored somewhere. The immediate value in the instruction
1811            is not bit enough so the value is stored in the got.  */
1812         {
1813           h->got.offset = htab->sgot->size;
1814           htab->sgot->size += GOT_ENTRY_SIZE;
1815         }
1816       else
1817         h->got.offset = (bfd_vma) -1;
1818     }
1819   else if (h->got.refcount > 0)
1820    {
1821       asection *s;
1822       bfd_boolean dyn;
1823       int tls_type = elf_s390_hash_entry(h)->tls_type;
1824
1825       /* Make sure this symbol is output as a dynamic symbol.
1826          Undefined weak syms won't yet be marked as dynamic.  */
1827       if (h->dynindx == -1
1828           && !h->forced_local)
1829         {
1830           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1831             return FALSE;
1832         }
1833
1834       s = htab->sgot;
1835       h->got.offset = s->size;
1836       s->size += GOT_ENTRY_SIZE;
1837       /* R_390_TLS_GD32 needs 2 consecutive GOT slots.  */
1838       if (tls_type == GOT_TLS_GD)
1839         s->size += GOT_ENTRY_SIZE;
1840       dyn = htab->elf.dynamic_sections_created;
1841       /* R_390_TLS_IE32 needs one dynamic relocation,
1842          R_390_TLS_GD32 needs one if local symbol and two if global.  */
1843       if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1844           || tls_type >= GOT_TLS_IE)
1845         htab->srelgot->size += sizeof (Elf32_External_Rela);
1846       else if (tls_type == GOT_TLS_GD)
1847         htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1848       else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1849                 || h->root.type != bfd_link_hash_undefweak)
1850                && (info->shared
1851                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1852         htab->srelgot->size += sizeof (Elf32_External_Rela);
1853     }
1854   else
1855     h->got.offset = (bfd_vma) -1;
1856
1857   eh = (struct elf_s390_link_hash_entry *) h;
1858   if (eh->dyn_relocs == NULL)
1859     return TRUE;
1860
1861   /* In the shared -Bsymbolic case, discard space allocated for
1862      dynamic pc-relative relocs against symbols which turn out to be
1863      defined in regular objects.  For the normal shared case, discard
1864      space for pc-relative relocs that have become local due to symbol
1865      visibility changes.  */
1866
1867   if (info->shared)
1868     {
1869       if (SYMBOL_REFERENCES_LOCAL (info, h))
1870         {
1871           struct elf_s390_dyn_relocs **pp;
1872
1873           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1874             {
1875               p->count -= p->pc_count;
1876               p->pc_count = 0;
1877               if (p->count == 0)
1878                 *pp = p->next;
1879               else
1880                 pp = &p->next;
1881             }
1882         }
1883
1884       /* Also discard relocs on undefined weak syms with non-default
1885          visibility.  */
1886       if (eh->dyn_relocs != NULL
1887           && h->root.type == bfd_link_hash_undefweak)
1888         {
1889           if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1890             eh->dyn_relocs = NULL;
1891
1892           /* Make sure undefined weak symbols are output as a dynamic
1893              symbol in PIEs.  */
1894           else if (h->dynindx == -1
1895                    && !h->forced_local)
1896             {
1897               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1898                 return FALSE;
1899             }
1900         }
1901     }
1902   else if (ELIMINATE_COPY_RELOCS)
1903     {
1904       /* For the non-shared case, discard space for relocs against
1905          symbols which turn out to need copy relocs or are not
1906          dynamic.  */
1907
1908       if (!h->non_got_ref
1909           && ((h->def_dynamic
1910                && !h->def_regular)
1911               || (htab->elf.dynamic_sections_created
1912                   && (h->root.type == bfd_link_hash_undefweak
1913                       || h->root.type == bfd_link_hash_undefined))))
1914         {
1915           /* Make sure this symbol is output as a dynamic symbol.
1916              Undefined weak syms won't yet be marked as dynamic.  */
1917           if (h->dynindx == -1
1918               && !h->forced_local)
1919             {
1920               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1921                 return FALSE;
1922             }
1923
1924           /* If that succeeded, we know we'll be keeping all the
1925              relocs.  */
1926           if (h->dynindx != -1)
1927             goto keep;
1928         }
1929
1930       eh->dyn_relocs = NULL;
1931
1932     keep: ;
1933     }
1934
1935   /* Finally, allocate space.  */
1936   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1937     {
1938       asection *sreloc = elf_section_data (p->sec)->sreloc;
1939
1940       sreloc->size += p->count * sizeof (Elf32_External_Rela);
1941     }
1942
1943   return TRUE;
1944 }
1945
1946 /* Find any dynamic relocs that apply to read-only sections.  */
1947
1948 static bfd_boolean
1949 readonly_dynrelocs (h, inf)
1950      struct elf_link_hash_entry *h;
1951      PTR inf;
1952 {
1953   struct elf_s390_link_hash_entry *eh;
1954   struct elf_s390_dyn_relocs *p;
1955
1956   if (h->root.type == bfd_link_hash_warning)
1957     h = (struct elf_link_hash_entry *) h->root.u.i.link;
1958
1959   eh = (struct elf_s390_link_hash_entry *) h;
1960   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1961     {
1962       asection *s = p->sec->output_section;
1963
1964       if (s != NULL && (s->flags & SEC_READONLY) != 0)
1965         {
1966           struct bfd_link_info *info = (struct bfd_link_info *) inf;
1967
1968           info->flags |= DF_TEXTREL;
1969
1970           /* Not an error, just cut short the traversal.  */
1971           return FALSE;
1972         }
1973     }
1974   return TRUE;
1975 }
1976
1977 /* Set the sizes of the dynamic sections.  */
1978
1979 static bfd_boolean
1980 elf_s390_size_dynamic_sections (output_bfd, info)
1981      bfd *output_bfd ATTRIBUTE_UNUSED;
1982      struct bfd_link_info *info;
1983 {
1984   struct elf_s390_link_hash_table *htab;
1985   bfd *dynobj;
1986   asection *s;
1987   bfd_boolean relocs;
1988   bfd *ibfd;
1989
1990   htab = elf_s390_hash_table (info);
1991   dynobj = htab->elf.dynobj;
1992   if (dynobj == NULL)
1993     abort ();
1994
1995   if (htab->elf.dynamic_sections_created)
1996     {
1997       /* Set the contents of the .interp section to the interpreter.  */
1998       if (info->executable)
1999         {
2000           s = bfd_get_section_by_name (dynobj, ".interp");
2001           if (s == NULL)
2002             abort ();
2003           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2004           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2005         }
2006     }
2007
2008   /* Set up .got offsets for local syms, and space for local dynamic
2009      relocs.  */
2010   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2011     {
2012       bfd_signed_vma *local_got;
2013       bfd_signed_vma *end_local_got;
2014       char *local_tls_type;
2015       bfd_size_type locsymcount;
2016       Elf_Internal_Shdr *symtab_hdr;
2017       asection *srela;
2018
2019       if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2020         continue;
2021
2022       for (s = ibfd->sections; s != NULL; s = s->next)
2023         {
2024           struct elf_s390_dyn_relocs *p;
2025
2026           for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2027             {
2028               if (!bfd_is_abs_section (p->sec)
2029                   && bfd_is_abs_section (p->sec->output_section))
2030                 {
2031                   /* Input section has been discarded, either because
2032                      it is a copy of a linkonce section or due to
2033                      linker script /DISCARD/, so we'll be discarding
2034                      the relocs too.  */
2035                 }
2036               else if (p->count != 0)
2037                 {
2038                   srela = elf_section_data (p->sec)->sreloc;
2039                   srela->size += p->count * sizeof (Elf32_External_Rela);
2040                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2041                     info->flags |= DF_TEXTREL;
2042                 }
2043             }
2044         }
2045
2046       local_got = elf_local_got_refcounts (ibfd);
2047       if (!local_got)
2048         continue;
2049
2050       symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2051       locsymcount = symtab_hdr->sh_info;
2052       end_local_got = local_got + locsymcount;
2053       local_tls_type = elf_s390_local_got_tls_type (ibfd);
2054       s = htab->sgot;
2055       srela = htab->srelgot;
2056       for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2057         {
2058           if (*local_got > 0)
2059             {
2060               *local_got = s->size;
2061               s->size += GOT_ENTRY_SIZE;
2062               if (*local_tls_type == GOT_TLS_GD)
2063                 s->size += GOT_ENTRY_SIZE;
2064               if (info->shared)
2065                 srela->size += sizeof (Elf32_External_Rela);
2066             }
2067           else
2068             *local_got = (bfd_vma) -1;
2069         }
2070     }
2071
2072   if (htab->tls_ldm_got.refcount > 0)
2073     {
2074       /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2075          relocs.  */
2076       htab->tls_ldm_got.offset = htab->sgot->size;
2077       htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2078       htab->srelgot->size += sizeof (Elf32_External_Rela);
2079     }
2080   else
2081     htab->tls_ldm_got.offset = -1;
2082
2083   /* Allocate global sym .plt and .got entries, and space for global
2084      sym dynamic relocs.  */
2085   elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2086
2087   /* We now have determined the sizes of the various dynamic sections.
2088      Allocate memory for them.  */
2089   relocs = FALSE;
2090   for (s = dynobj->sections; s != NULL; s = s->next)
2091     {
2092       if ((s->flags & SEC_LINKER_CREATED) == 0)
2093         continue;
2094
2095       if (s == htab->splt
2096           || s == htab->sgot
2097           || s == htab->sgotplt
2098           || s == htab->sdynbss)
2099         {
2100           /* Strip this section if we don't need it; see the
2101              comment below.  */
2102         }
2103       else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2104         {
2105           if (s->size != 0)
2106             relocs = TRUE;
2107
2108           /* We use the reloc_count field as a counter if we need
2109              to copy relocs into the output file.  */
2110           s->reloc_count = 0;
2111         }
2112       else
2113         {
2114           /* It's not one of our sections, so don't allocate space.  */
2115           continue;
2116         }
2117
2118       if (s->size == 0)
2119         {
2120           /* If we don't need this section, strip it from the
2121              output file.  This is to handle .rela.bss and
2122              .rela.plt.  We must create it in
2123              create_dynamic_sections, because it must be created
2124              before the linker maps input sections to output
2125              sections.  The linker does that before
2126              adjust_dynamic_symbol is called, and it is that
2127              function which decides whether anything needs to go
2128              into these sections.  */
2129
2130           s->flags |= SEC_EXCLUDE;
2131           continue;
2132         }
2133
2134       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2135         continue;
2136
2137       /* Allocate memory for the section contents.  We use bfd_zalloc
2138          here in case unused entries are not reclaimed before the
2139          section's contents are written out.  This should not happen,
2140          but this way if it does, we get a R_390_NONE reloc instead
2141          of garbage.  */
2142       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2143       if (s->contents == NULL)
2144         return FALSE;
2145     }
2146
2147   if (htab->elf.dynamic_sections_created)
2148     {
2149       /* Add some entries to the .dynamic section.  We fill in the
2150          values later, in elf_s390_finish_dynamic_sections, but we
2151          must add the entries now so that we get the correct size for
2152          the .dynamic section.  The DT_DEBUG entry is filled in by the
2153          dynamic linker and used by the debugger.  */
2154 #define add_dynamic_entry(TAG, VAL) \
2155   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2156
2157       if (info->executable)
2158         {
2159           if (!add_dynamic_entry (DT_DEBUG, 0))
2160             return FALSE;
2161         }
2162
2163       if (htab->splt->size != 0)
2164         {
2165           if (!add_dynamic_entry (DT_PLTGOT, 0)
2166               || !add_dynamic_entry (DT_PLTRELSZ, 0)
2167               || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2168               || !add_dynamic_entry (DT_JMPREL, 0))
2169             return FALSE;
2170         }
2171
2172       if (relocs)
2173         {
2174           if (!add_dynamic_entry (DT_RELA, 0)
2175               || !add_dynamic_entry (DT_RELASZ, 0)
2176               || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2177             return FALSE;
2178
2179           /* If any dynamic relocs apply to a read-only section,
2180              then we need a DT_TEXTREL entry.  */
2181           if ((info->flags & DF_TEXTREL) == 0)
2182             elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2183                                     (PTR) info);
2184
2185           if ((info->flags & DF_TEXTREL) != 0)
2186             {
2187               if (!add_dynamic_entry (DT_TEXTREL, 0))
2188                 return FALSE;
2189             }
2190         }
2191     }
2192 #undef add_dynamic_entry
2193
2194   return TRUE;
2195 }
2196
2197 /* Return the base VMA address which should be subtracted from real addresses
2198    when resolving @dtpoff relocation.
2199    This is PT_TLS segment p_vaddr.  */
2200
2201 static bfd_vma
2202 dtpoff_base (info)
2203      struct bfd_link_info *info;
2204 {
2205   /* If tls_sec is NULL, we should have signalled an error already.  */
2206   if (elf_hash_table (info)->tls_sec == NULL)
2207     return 0;
2208   return elf_hash_table (info)->tls_sec->vma;
2209 }
2210
2211 /* Return the relocation value for @tpoff relocation
2212    if STT_TLS virtual address is ADDRESS.  */
2213
2214 static bfd_vma
2215 tpoff (info, address)
2216      struct bfd_link_info *info;
2217      bfd_vma address;
2218 {
2219   struct elf_link_hash_table *htab = elf_hash_table (info);
2220
2221   /* If tls_sec is NULL, we should have signalled an error already.  */
2222   if (htab->tls_sec == NULL)
2223     return 0;
2224   return htab->tls_size + htab->tls_sec->vma - address;
2225 }
2226
2227 /* Complain if TLS instruction relocation is against an invalid
2228    instruction.  */
2229
2230 static void
2231 invalid_tls_insn (input_bfd, input_section, rel)
2232      bfd *input_bfd;
2233      asection *input_section;
2234      Elf_Internal_Rela *rel;
2235 {
2236   reloc_howto_type *howto;
2237
2238   howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2239   (*_bfd_error_handler)
2240     (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2241      input_bfd,
2242      input_section,
2243      (long) rel->r_offset,
2244      howto->name);
2245   bfd_set_error (bfd_error_bad_value);
2246 }
2247
2248 /* Relocate a 390 ELF section.  */
2249
2250 static bfd_boolean
2251 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2252                               contents, relocs, local_syms, local_sections)
2253      bfd *output_bfd;
2254      struct bfd_link_info *info;
2255      bfd *input_bfd;
2256      asection *input_section;
2257      bfd_byte *contents;
2258      Elf_Internal_Rela *relocs;
2259      Elf_Internal_Sym *local_syms;
2260      asection **local_sections;
2261 {
2262   struct elf_s390_link_hash_table *htab;
2263   Elf_Internal_Shdr *symtab_hdr;
2264   struct elf_link_hash_entry **sym_hashes;
2265   bfd_vma *local_got_offsets;
2266   Elf_Internal_Rela *rel;
2267   Elf_Internal_Rela *relend;
2268
2269   if (info->relocatable)
2270     return TRUE;
2271
2272   htab = elf_s390_hash_table (info);
2273   symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2274   sym_hashes = elf_sym_hashes (input_bfd);
2275   local_got_offsets = elf_local_got_offsets (input_bfd);
2276
2277   rel = relocs;
2278   relend = relocs + input_section->reloc_count;
2279   for (; rel < relend; rel++)
2280     {
2281       unsigned int r_type;
2282       reloc_howto_type *howto;
2283       unsigned long r_symndx;
2284       struct elf_link_hash_entry *h;
2285       Elf_Internal_Sym *sym;
2286       asection *sec;
2287       bfd_vma off;
2288       bfd_vma relocation;
2289       bfd_boolean unresolved_reloc;
2290       bfd_reloc_status_type r;
2291       int tls_type;
2292
2293       r_type = ELF32_R_TYPE (rel->r_info);
2294       if (r_type == (int) R_390_GNU_VTINHERIT
2295           || r_type == (int) R_390_GNU_VTENTRY)
2296         continue;
2297       if (r_type >= (int) R_390_max)
2298         {
2299           bfd_set_error (bfd_error_bad_value);
2300           return FALSE;
2301         }
2302
2303       howto = elf_howto_table + r_type;
2304       r_symndx = ELF32_R_SYM (rel->r_info);
2305
2306       /* This is a final link.  */
2307       h = NULL;
2308       sym = NULL;
2309       sec = NULL;
2310       unresolved_reloc = FALSE;
2311       if (r_symndx < symtab_hdr->sh_info)
2312         {
2313           sym = local_syms + r_symndx;
2314           sec = local_sections[r_symndx];
2315           relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2316         }
2317       else
2318         {
2319           bfd_boolean warned ATTRIBUTE_UNUSED;
2320
2321           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2322                                    r_symndx, symtab_hdr, sym_hashes,
2323                                    h, sec, relocation,
2324                                    unresolved_reloc, warned);
2325         }
2326
2327       switch (r_type)
2328         {
2329         case R_390_GOTPLT12:
2330         case R_390_GOTPLT16:
2331         case R_390_GOTPLT20:
2332         case R_390_GOTPLT32:
2333         case R_390_GOTPLTENT:
2334           /* There are three cases for a GOTPLT relocation. 1) The
2335              relocation is against the jump slot entry of a plt that
2336              will get emitted to the output file. 2) The relocation
2337              is against the jump slot of a plt entry that has been
2338              removed. elf_s390_adjust_gotplt has created a GOT entry
2339              as replacement. 3) The relocation is against a local symbol.
2340              Cases 2) and 3) are the same as the GOT relocation code
2341              so we just have to test for case 1 and fall through for
2342              the other two.  */
2343           if (h != NULL && h->plt.offset != (bfd_vma) -1)
2344             {
2345               bfd_vma plt_index;
2346
2347               /* Calc. index no.
2348                  Current offset - size first entry / entry size.  */
2349               plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2350                 PLT_ENTRY_SIZE;
2351
2352               /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2353                  addr & GOT addr.  */
2354               relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2355               unresolved_reloc = FALSE;
2356
2357               if (r_type == R_390_GOTPLTENT)
2358                 relocation += htab->sgot->output_section->vma;
2359               break;
2360             }
2361           /* Fall through.  */
2362
2363         case R_390_GOT12:
2364         case R_390_GOT16:
2365         case R_390_GOT20:
2366         case R_390_GOT32:
2367         case R_390_GOTENT:
2368           /* Relocation is to the entry for this symbol in the global
2369              offset table.  */
2370           if (htab->sgot == NULL)
2371             abort ();
2372
2373           if (h != NULL)
2374             {
2375               bfd_boolean dyn;
2376
2377               off = h->got.offset;
2378               dyn = htab->elf.dynamic_sections_created;
2379               if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2380                   || (info->shared
2381                       && (info->symbolic
2382                           || h->dynindx == -1
2383                           || h->forced_local)
2384                       && h->def_regular)
2385                   || (ELF_ST_VISIBILITY (h->other)
2386                       && h->root.type == bfd_link_hash_undefweak))
2387                 {
2388                   /* This is actually a static link, or it is a
2389                      -Bsymbolic link and the symbol is defined
2390                      locally, or the symbol was forced to be local
2391                      because of a version file.  We must initialize
2392                      this entry in the global offset table.  Since the
2393                      offset must always be a multiple of 2, we use the
2394                      least significant bit to record whether we have
2395                      initialized it already.
2396
2397                      When doing a dynamic link, we create a .rel.got
2398                      relocation entry to initialize the value.  This
2399                      is done in the finish_dynamic_symbol routine.  */
2400                   if ((off & 1) != 0)
2401                     off &= ~1;
2402                   else
2403                     {
2404                       bfd_put_32 (output_bfd, relocation,
2405                                   htab->sgot->contents + off);
2406                       h->got.offset |= 1;
2407                     }
2408                 }
2409               else
2410                 unresolved_reloc = FALSE;
2411             }
2412           else
2413             {
2414               if (local_got_offsets == NULL)
2415                 abort ();
2416
2417               off = local_got_offsets[r_symndx];
2418
2419               /* The offset must always be a multiple of 4.  We use
2420                  the least significant bit to record whether we have
2421                  already generated the necessary reloc.  */
2422               if ((off & 1) != 0)
2423                 off &= ~1;
2424               else
2425                 {
2426                   bfd_put_32 (output_bfd, relocation,
2427                               htab->sgot->contents + off);
2428
2429                   if (info->shared)
2430                     {
2431                       asection *srelgot;
2432                       Elf_Internal_Rela outrel;
2433                       bfd_byte *loc;
2434
2435                       srelgot = htab->srelgot;
2436                       if (srelgot == NULL)
2437                         abort ();
2438
2439                       outrel.r_offset = (htab->sgot->output_section->vma
2440                                          + htab->sgot->output_offset
2441                                          + off);
2442                       outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2443                       outrel.r_addend = relocation;
2444                       loc = srelgot->contents;
2445                       loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2446                       bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2447                     }
2448
2449                   local_got_offsets[r_symndx] |= 1;
2450                 }
2451             }
2452
2453           if (off >= (bfd_vma) -2)
2454             abort ();
2455
2456           relocation = htab->sgot->output_offset + off;
2457
2458           /* For @GOTENT the relocation is against the offset between
2459              the instruction and the symbols entry in the GOT and not
2460              between the start of the GOT and the symbols entry. We
2461              add the vma of the GOT to get the correct value.  */
2462           if (   r_type == R_390_GOTENT
2463               || r_type == R_390_GOTPLTENT)
2464             relocation += htab->sgot->output_section->vma;
2465
2466           break;
2467
2468         case R_390_GOTOFF16:
2469         case R_390_GOTOFF32:
2470           /* Relocation is relative to the start of the global offset
2471              table.  */
2472
2473           /* Note that sgot->output_offset is not involved in this
2474              calculation.  We always want the start of .got.  If we
2475              defined _GLOBAL_OFFSET_TABLE in a different way, as is
2476              permitted by the ABI, we might have to change this
2477              calculation.  */
2478           relocation -= htab->sgot->output_section->vma;
2479           break;
2480
2481         case R_390_GOTPC:
2482         case R_390_GOTPCDBL:
2483           /* Use global offset table as symbol value.  */
2484           relocation = htab->sgot->output_section->vma;
2485           unresolved_reloc = FALSE;
2486           break;
2487
2488         case R_390_PLT16DBL:
2489         case R_390_PLT32DBL:
2490         case R_390_PLT32:
2491           /* Relocation is to the entry for this symbol in the
2492              procedure linkage table.  */
2493
2494           /* Resolve a PLT32 reloc against a local symbol directly,
2495              without using the procedure linkage table.  */
2496           if (h == NULL)
2497             break;
2498
2499           if (h->plt.offset == (bfd_vma) -1
2500               || htab->splt == NULL)
2501             {
2502               /* We didn't make a PLT entry for this symbol.  This
2503                  happens when statically linking PIC code, or when
2504                  using -Bsymbolic.  */
2505               break;
2506             }
2507
2508           relocation = (htab->splt->output_section->vma
2509                         + htab->splt->output_offset
2510                         + h->plt.offset);
2511           unresolved_reloc = FALSE;
2512           break;
2513
2514         case R_390_PLTOFF16:
2515         case R_390_PLTOFF32:
2516           /* Relocation is to the entry for this symbol in the
2517              procedure linkage table relative to the start of the GOT.  */
2518
2519           /* For local symbols or if we didn't make a PLT entry for
2520              this symbol resolve the symbol directly.  */
2521           if (   h == NULL
2522               || h->plt.offset == (bfd_vma) -1
2523               || htab->splt == NULL)
2524             {
2525               relocation -= htab->sgot->output_section->vma;
2526               break;
2527             }
2528
2529           relocation = (htab->splt->output_section->vma
2530                         + htab->splt->output_offset
2531                         + h->plt.offset
2532                         - htab->sgot->output_section->vma);
2533           unresolved_reloc = FALSE;
2534           break;
2535
2536         case R_390_8:
2537         case R_390_16:
2538         case R_390_32:
2539         case R_390_PC16:
2540         case R_390_PC16DBL:
2541         case R_390_PC32DBL:
2542         case R_390_PC32:
2543           /* r_symndx will be zero only for relocs against symbols
2544              from removed linkonce sections, or sections discarded by
2545              a linker script.  */
2546           if (r_symndx == 0)
2547             {
2548               _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2549               break;
2550             }
2551
2552           if ((input_section->flags & SEC_ALLOC) == 0)
2553             break;
2554
2555           if ((info->shared
2556                && (h == NULL
2557                    || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2558                    || h->root.type != bfd_link_hash_undefweak)
2559                && ((r_type != R_390_PC16
2560                     && r_type != R_390_PC16DBL
2561                     && r_type != R_390_PC32DBL
2562                     && r_type != R_390_PC32)
2563                    || (h != NULL
2564                        && !SYMBOL_REFERENCES_LOCAL (info, h))))
2565               || (ELIMINATE_COPY_RELOCS
2566                   && !info->shared
2567                   && h != NULL
2568                   && h->dynindx != -1
2569                   && !h->non_got_ref
2570                   && ((h->def_dynamic
2571                        && !h->def_regular)
2572                       || h->root.type == bfd_link_hash_undefweak
2573                       || h->root.type == bfd_link_hash_undefined)))
2574             {
2575               Elf_Internal_Rela outrel;
2576               bfd_boolean skip, relocate;
2577               asection *sreloc;
2578               bfd_byte *loc;
2579
2580               /* When generating a shared object, these relocations
2581                  are copied into the output file to be resolved at run
2582                  time.  */
2583
2584               skip = FALSE;
2585               relocate = FALSE;
2586
2587               outrel.r_offset =
2588                 _bfd_elf_section_offset (output_bfd, info, input_section,
2589                                          rel->r_offset);
2590               if (outrel.r_offset == (bfd_vma) -1)
2591                 skip = TRUE;
2592               else if (outrel.r_offset == (bfd_vma) -2)
2593                 skip = TRUE, relocate = TRUE;
2594               outrel.r_offset += (input_section->output_section->vma
2595                                   + input_section->output_offset);
2596
2597               if (skip)
2598                 memset (&outrel, 0, sizeof outrel);
2599               else if (h != NULL
2600                        && h->dynindx != -1
2601                        && (r_type == R_390_PC16
2602                            || r_type == R_390_PC16DBL
2603                            || r_type == R_390_PC32DBL
2604                            || r_type == R_390_PC32
2605                            || !info->shared
2606                            || !info->symbolic
2607                            || !h->def_regular))
2608                 {
2609                   outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2610                   outrel.r_addend = rel->r_addend;
2611                 }
2612               else
2613                 {
2614                   /* This symbol is local, or marked to become local.  */
2615                   outrel.r_addend = relocation + rel->r_addend;
2616                   if (r_type == R_390_32)
2617                     {
2618                       relocate = TRUE;
2619                       outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2620                     }
2621                   else
2622                     {
2623                       long sindx;
2624
2625                       if (bfd_is_abs_section (sec))
2626                         sindx = 0;
2627                       else if (sec == NULL || sec->owner == NULL)
2628                         {
2629                           bfd_set_error(bfd_error_bad_value);
2630                           return FALSE;
2631                         }
2632                       else
2633                         {
2634                           asection *osec;
2635
2636                           osec = sec->output_section;
2637                           sindx = elf_section_data (osec)->dynindx;
2638                           if (sindx == 0)
2639                             {
2640                               osec = htab->elf.text_index_section;
2641                               sindx = elf_section_data (osec)->dynindx;
2642                             }
2643                           BFD_ASSERT (sindx != 0);
2644
2645                           /* We are turning this relocation into one
2646                              against a section symbol, so subtract out
2647                              the output section's address but not the
2648                              offset of the input section in the output
2649                              section.  */
2650                           outrel.r_addend -= osec->vma;
2651                         }
2652                       outrel.r_info = ELF32_R_INFO (sindx, r_type);
2653                     }
2654                 }
2655
2656               sreloc = elf_section_data (input_section)->sreloc;
2657               if (sreloc == NULL)
2658                 abort ();
2659
2660               loc = sreloc->contents;
2661               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2662               bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2663
2664               /* If this reloc is against an external symbol, we do
2665                  not want to fiddle with the addend.  Otherwise, we
2666                  need to include the symbol value so that it becomes
2667                  an addend for the dynamic reloc.  */
2668               if (! relocate)
2669                 continue;
2670             }
2671           break;
2672
2673           /* Relocations for tls literal pool entries.  */
2674         case R_390_TLS_IE32:
2675           if (info->shared)
2676             {
2677               Elf_Internal_Rela outrel;
2678               asection *sreloc;
2679               bfd_byte *loc;
2680
2681               outrel.r_offset = rel->r_offset
2682                                 + input_section->output_section->vma
2683                                 + input_section->output_offset;
2684               outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2685               sreloc = elf_section_data (input_section)->sreloc;
2686               if (sreloc == NULL)
2687                 abort ();
2688               loc = sreloc->contents;
2689               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2690               bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2691             }
2692           /* Fall through.  */
2693
2694         case R_390_TLS_GD32:
2695         case R_390_TLS_GOTIE32:
2696           r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2697           tls_type = GOT_UNKNOWN;
2698           if (h == NULL && local_got_offsets)
2699             tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2700           else if (h != NULL)
2701             {
2702               tls_type = elf_s390_hash_entry(h)->tls_type;
2703               if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2704                 r_type = R_390_TLS_LE32;
2705             }
2706           if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2707             r_type = R_390_TLS_IE32;
2708
2709           if (r_type == R_390_TLS_LE32)
2710             {
2711               /* This relocation gets optimized away by the local exec
2712                  access optimization.  */
2713               BFD_ASSERT (! unresolved_reloc);
2714               bfd_put_32 (output_bfd, -tpoff (info, relocation),
2715                           contents + rel->r_offset);
2716               continue;
2717             }
2718
2719           if (htab->sgot == NULL)
2720             abort ();
2721
2722           if (h != NULL)
2723             off = h->got.offset;
2724           else
2725             {
2726               if (local_got_offsets == NULL)
2727                 abort ();
2728
2729               off = local_got_offsets[r_symndx];
2730             }
2731
2732         emit_tls_relocs:
2733
2734           if ((off & 1) != 0)
2735             off &= ~1;
2736           else
2737             {
2738               Elf_Internal_Rela outrel;
2739               bfd_byte *loc;
2740               int dr_type, indx;
2741
2742               if (htab->srelgot == NULL)
2743                 abort ();
2744
2745               outrel.r_offset = (htab->sgot->output_section->vma
2746                                  + htab->sgot->output_offset + off);
2747
2748               indx = h && h->dynindx != -1 ? h->dynindx : 0;
2749               if (r_type == R_390_TLS_GD32)
2750                 dr_type = R_390_TLS_DTPMOD;
2751               else
2752                 dr_type = R_390_TLS_TPOFF;
2753               if (dr_type == R_390_TLS_TPOFF && indx == 0)
2754                 outrel.r_addend = relocation - dtpoff_base (info);
2755               else
2756                 outrel.r_addend = 0;
2757               outrel.r_info = ELF32_R_INFO (indx, dr_type);
2758               loc = htab->srelgot->contents;
2759               loc += htab->srelgot->reloc_count++
2760                 * sizeof (Elf32_External_Rela);
2761               bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2762
2763               if (r_type == R_390_TLS_GD32)
2764                 {
2765                   if (indx == 0)
2766                     {
2767                       BFD_ASSERT (! unresolved_reloc);
2768                       bfd_put_32 (output_bfd,
2769                                   relocation - dtpoff_base (info),
2770                                   htab->sgot->contents + off + GOT_ENTRY_SIZE);
2771                     }
2772                   else
2773                     {
2774                       outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2775                       outrel.r_offset += GOT_ENTRY_SIZE;
2776                       outrel.r_addend = 0;
2777                       htab->srelgot->reloc_count++;
2778                       loc += sizeof (Elf32_External_Rela);
2779                       bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2780                     }
2781                 }
2782
2783               if (h != NULL)
2784                 h->got.offset |= 1;
2785               else
2786                 local_got_offsets[r_symndx] |= 1;
2787             }
2788
2789           if (off >= (bfd_vma) -2)
2790             abort ();
2791           if (r_type == ELF32_R_TYPE (rel->r_info))
2792             {
2793               relocation = htab->sgot->output_offset + off;
2794               if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2795                 relocation += htab->sgot->output_section->vma;
2796               unresolved_reloc = FALSE;
2797             }
2798           else
2799             {
2800               bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2801                           contents + rel->r_offset);
2802               continue;
2803             }
2804           break;
2805
2806         case R_390_TLS_GOTIE12:
2807         case R_390_TLS_GOTIE20:
2808         case R_390_TLS_IEENT:
2809           if (h == NULL)
2810             {
2811               if (local_got_offsets == NULL)
2812                 abort();
2813               off = local_got_offsets[r_symndx];
2814               if (info->shared)
2815                 goto emit_tls_relocs;
2816             }
2817           else
2818             {
2819               off = h->got.offset;
2820               tls_type = elf_s390_hash_entry(h)->tls_type;
2821               if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2822                 goto emit_tls_relocs;
2823             }
2824
2825           if (htab->sgot == NULL)
2826             abort ();
2827
2828           BFD_ASSERT (! unresolved_reloc);
2829           bfd_put_32 (output_bfd, -tpoff (info, relocation),
2830                       htab->sgot->contents + off);
2831           relocation = htab->sgot->output_offset + off;
2832           if (r_type == R_390_TLS_IEENT)
2833             relocation += htab->sgot->output_section->vma;
2834           unresolved_reloc = FALSE;
2835           break;
2836
2837         case R_390_TLS_LDM32:
2838           if (! info->shared)
2839             /* The literal pool entry this relocation refers to gets ignored
2840                by the optimized code of the local exec model. Do nothing
2841                and the value will turn out zero.  */
2842             continue;
2843
2844           if (htab->sgot == NULL)
2845             abort ();
2846
2847           off = htab->tls_ldm_got.offset;
2848           if (off & 1)
2849             off &= ~1;
2850           else
2851             {
2852               Elf_Internal_Rela outrel;
2853               bfd_byte *loc;
2854
2855               if (htab->srelgot == NULL)
2856                 abort ();
2857
2858               outrel.r_offset = (htab->sgot->output_section->vma
2859                                  + htab->sgot->output_offset + off);
2860
2861               bfd_put_32 (output_bfd, 0,
2862                           htab->sgot->contents + off + GOT_ENTRY_SIZE);
2863               outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2864               outrel.r_addend = 0;
2865               loc = htab->srelgot->contents;
2866               loc += htab->srelgot->reloc_count++
2867                 * sizeof (Elf32_External_Rela);
2868               bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2869               htab->tls_ldm_got.offset |= 1;
2870             }
2871           relocation = htab->sgot->output_offset + off;
2872           unresolved_reloc = FALSE;
2873           break;
2874
2875         case R_390_TLS_LE32:
2876           if (info->shared)
2877             {
2878               /* Linking a shared library with non-fpic code requires
2879                  a R_390_TLS_TPOFF relocation.  */
2880               Elf_Internal_Rela outrel;
2881               asection *sreloc;
2882               bfd_byte *loc;
2883               int indx;
2884
2885               outrel.r_offset = rel->r_offset
2886                                 + input_section->output_section->vma
2887                                 + input_section->output_offset;
2888               if (h != NULL && h->dynindx != -1)
2889                 indx = h->dynindx;
2890               else
2891                 indx = 0;
2892               outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2893               if (indx == 0)
2894                 outrel.r_addend = relocation - dtpoff_base (info);
2895               else
2896                 outrel.r_addend = 0;
2897               sreloc = elf_section_data (input_section)->sreloc;
2898               if (sreloc == NULL)
2899                 abort ();
2900               loc = sreloc->contents;
2901               loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2902               bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2903             }
2904           else
2905             {
2906               BFD_ASSERT (! unresolved_reloc);
2907               bfd_put_32 (output_bfd, -tpoff (info, relocation),
2908                           contents + rel->r_offset);
2909             }
2910           continue;
2911
2912         case R_390_TLS_LDO32:
2913           if (info->shared)
2914             relocation -= dtpoff_base (info);
2915           else
2916             /* When converting LDO to LE, we must negate.  */
2917             relocation = -tpoff (info, relocation);
2918           break;
2919
2920           /* Relocations for tls instructions.  */
2921         case R_390_TLS_LOAD:
2922         case R_390_TLS_GDCALL:
2923         case R_390_TLS_LDCALL:
2924           tls_type = GOT_UNKNOWN;
2925           if (h == NULL && local_got_offsets)
2926             tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2927           else if (h != NULL)
2928             tls_type = elf_s390_hash_entry(h)->tls_type;
2929
2930           if (tls_type == GOT_TLS_GD)
2931             continue;
2932
2933           if (r_type == R_390_TLS_LOAD)
2934             {
2935               if (!info->shared && (h == NULL || h->dynindx == -1))
2936                 {
2937                   /* IE->LE transition. Four valid cases:
2938                      l %rx,0(0,%ry)    -> lr %rx,%ry + bcr 0,0
2939                      l %rx,0(%ry,0)    -> lr %rx,%ry + bcr 0,0
2940                      l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2941                      l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2942                   unsigned int insn, ry;
2943
2944                   insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2945                   ry = 0;
2946                   if ((insn & 0xff00f000) == 0x58000000)
2947                     /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0  */
2948                     ry = (insn & 0x000f0000);
2949                   else if ((insn & 0xff0f0000) == 0x58000000)
2950                     /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0  */
2951                     ry = (insn & 0x0000f000) << 4;
2952                   else if ((insn & 0xff00f000) == 0x5800c000)
2953                     /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0  */
2954                     ry = (insn & 0x000f0000);
2955                   else if ((insn & 0xff0f0000) == 0x580c0000)
2956                     /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0  */
2957                     ry = (insn & 0x0000f000) << 4;
2958                   else
2959                     invalid_tls_insn (input_bfd, input_section, rel);
2960                   insn = 0x18000700 | (insn & 0x00f00000) | ry;
2961                   bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2962                 }
2963             }
2964           else if (r_type == R_390_TLS_GDCALL)
2965             {
2966               unsigned int insn;
2967
2968               insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2969               if ((insn & 0xff000fff) != 0x4d000000 &&
2970                   (insn & 0xffff0000) != 0xc0e50000)
2971                 invalid_tls_insn (input_bfd, input_section, rel);
2972               if (!info->shared && (h == NULL || h->dynindx == -1))
2973                 {
2974                   if ((insn & 0xff000000) == 0x4d000000)
2975                     {
2976                       /* GD->LE transition.
2977                          bas %r14,0(%rx,%r13) -> bc 0,0  */
2978                       insn = 0x47000000;
2979                     }
2980                   else
2981                     {
2982                       /* GD->LE transition.
2983                          brasl %r14,_tls_get_addr@plt -> brcl 0,.  */
2984                       insn = 0xc0040000;
2985                       bfd_put_16 (output_bfd, 0x0000,
2986                                   contents + rel->r_offset + 4);
2987                     }
2988                 }
2989               else
2990                 {
2991                   if ((insn & 0xff000000) == 0x4d000000)
2992                     {
2993                       /* GD->IE transition.
2994                          bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12)  */
2995                       insn = 0x5822c000;
2996                     }
2997                   else
2998                     {
2999                       /* GD->IE transition.
3000                          brasl %r14,__tls_get_addr@plt ->
3001                                 l %r2,0(%r2,%r12) ; bcr 0,0 */
3002                       insn = 0x5822c000;
3003                       bfd_put_16 (output_bfd, 0x0700,
3004                                   contents + rel->r_offset + 4);
3005                     }
3006                 }
3007               bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3008             }
3009           else if (r_type == R_390_TLS_LDCALL)
3010             {
3011               if (!info->shared)
3012                 {
3013                   unsigned int insn;
3014
3015                   insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3016                   if ((insn & 0xff000fff) != 0x4d000000 &&
3017                       (insn & 0xffff0000) != 0xc0e50000)
3018                     invalid_tls_insn (input_bfd, input_section, rel);
3019                   if ((insn & 0xff000000) == 0x4d000000)
3020                     {
3021                       /* LD->LE transition.
3022                          bas %r14,0(%rx,%r13) -> bc 0,0  */
3023                       insn = 0x47000000;
3024                     }
3025                   else
3026                     {
3027                       /* LD->LE transition.
3028                          brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3029                       insn = 0xc0040000;
3030                       bfd_put_16 (output_bfd, 0x0000,
3031                                   contents + rel->r_offset + 4);
3032                     }
3033                   bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3034                 }
3035             }
3036           continue;
3037
3038         default:
3039           break;
3040         }
3041
3042       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3043          because such sections are not SEC_ALLOC and thus ld.so will
3044          not process them.  */
3045       if (unresolved_reloc
3046           && !((input_section->flags & SEC_DEBUGGING) != 0
3047                && h->def_dynamic))
3048         (*_bfd_error_handler)
3049           (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3050            input_bfd,
3051            input_section,
3052            (long) rel->r_offset,
3053            howto->name,
3054            h->root.root.string);
3055
3056       if (r_type == R_390_20
3057           || r_type == R_390_GOT20
3058           || r_type == R_390_GOTPLT20
3059           || r_type == R_390_TLS_GOTIE20)
3060         {
3061           relocation += rel->r_addend;
3062           relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3063           r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3064                                         contents, rel->r_offset,
3065                                         relocation, 0);
3066         }
3067       else
3068         r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3069                                       contents, rel->r_offset,
3070                                       relocation, rel->r_addend);
3071
3072       if (r != bfd_reloc_ok)
3073         {
3074           const char *name;
3075
3076           if (h != NULL)
3077             name = h->root.root.string;
3078           else
3079             {
3080               name = bfd_elf_string_from_elf_section (input_bfd,
3081                                                       symtab_hdr->sh_link,
3082                                                       sym->st_name);
3083               if (name == NULL)
3084                 return FALSE;
3085               if (*name == '\0')
3086                 name = bfd_section_name (input_bfd, sec);
3087             }
3088
3089           if (r == bfd_reloc_overflow)
3090             {
3091
3092               if (! ((*info->callbacks->reloc_overflow)
3093                      (info, (h ? &h->root : NULL), name, howto->name,
3094                       (bfd_vma) 0, input_bfd, input_section,
3095                       rel->r_offset)))
3096                 return FALSE;
3097             }
3098           else
3099             {
3100               (*_bfd_error_handler)
3101                 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3102                  input_bfd, input_section,
3103                  (long) rel->r_offset, name, (int) r);
3104               return FALSE;
3105             }
3106         }
3107     }
3108
3109   return TRUE;
3110 }
3111
3112 /* Finish up dynamic symbol handling.  We set the contents of various
3113    dynamic sections here.  */
3114
3115 static bfd_boolean
3116 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3117      bfd *output_bfd;
3118      struct bfd_link_info *info;
3119      struct elf_link_hash_entry *h;
3120      Elf_Internal_Sym *sym;
3121 {
3122   struct elf_s390_link_hash_table *htab;
3123
3124   htab = elf_s390_hash_table (info);
3125
3126   if (h->plt.offset != (bfd_vma) -1)
3127     {
3128       bfd_vma plt_index;
3129       bfd_vma got_offset;
3130       Elf_Internal_Rela rela;
3131       bfd_byte *loc;
3132       bfd_vma relative_offset;
3133
3134       /* This symbol has an entry in the procedure linkage table.  Set
3135          it up.  */
3136       if (h->dynindx == -1
3137           || htab->splt == NULL
3138           || htab->sgotplt == NULL
3139           || htab->srelplt == NULL)
3140         abort ();
3141
3142       /* Calc. index no.
3143          Current offset - size first entry / entry size.  */
3144       plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3145
3146       /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3147          addr & GOT addr.  */
3148       got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3149
3150       /* S390 uses halfwords for relative branch calc!  */
3151       relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3152                             (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3153       /* If offset is > 32768, branch to a previous branch
3154          390 can only handle +-64 K jumps.  */
3155       if ( -32768 > (int) relative_offset )
3156         relative_offset
3157           = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3158
3159       /* Fill in the entry in the procedure linkage table.  */
3160       if (!info->shared)
3161         {
3162           bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3163                       htab->splt->contents + h->plt.offset);
3164           bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3165                       htab->splt->contents + h->plt.offset + 4);
3166           bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3167                       htab->splt->contents + h->plt.offset + 8);
3168           bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3169                       htab->splt->contents + h->plt.offset + 12);
3170           bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3171                       htab->splt->contents + h->plt.offset + 16);
3172           bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3173                       htab->splt->contents + h->plt.offset + 20);
3174           bfd_put_32 (output_bfd,
3175                       (htab->sgotplt->output_section->vma
3176                        + htab->sgotplt->output_offset
3177                        + got_offset),
3178                       htab->splt->contents + h->plt.offset + 24);
3179         }
3180       else if (got_offset < 4096)
3181         {
3182           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3183                       htab->splt->contents + h->plt.offset);
3184           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3185                       htab->splt->contents + h->plt.offset + 4);
3186           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3187                       htab->splt->contents + h->plt.offset + 8);
3188           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3189                       htab->splt->contents + h->plt.offset + 12);
3190           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3191                       htab->splt->contents + h->plt.offset + 16);
3192           bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3193                       htab->splt->contents + h->plt.offset + 20);
3194           bfd_put_32 (output_bfd, (bfd_vma) 0,
3195                       htab->splt->contents + h->plt.offset + 24);
3196         }
3197       else if (got_offset < 32768)
3198         {
3199           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3200                       htab->splt->contents + h->plt.offset);
3201           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3202                       htab->splt->contents + h->plt.offset + 4);
3203           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3204                       htab->splt->contents + h->plt.offset + 8);
3205           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3206                       htab->splt->contents + h->plt.offset + 12);
3207           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3208                       htab->splt->contents + h->plt.offset + 16);
3209           bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3210                       htab->splt->contents + h->plt.offset + 20);
3211           bfd_put_32 (output_bfd, (bfd_vma) 0,
3212                       htab->splt->contents + h->plt.offset + 24);
3213         }
3214       else
3215         {
3216           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3217                       htab->splt->contents + h->plt.offset);
3218           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3219                       htab->splt->contents + h->plt.offset + 4);
3220           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3221                       htab->splt->contents + h->plt.offset + 8);
3222           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3223                       htab->splt->contents + h->plt.offset + 12);
3224           bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3225                       htab->splt->contents + h->plt.offset + 16);
3226           bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3227                       htab->splt->contents + h->plt.offset + 20);
3228           bfd_put_32 (output_bfd, got_offset,
3229                       htab->splt->contents + h->plt.offset + 24);
3230         }
3231       /* Insert offset into  reloc. table here.  */
3232       bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3233                   htab->splt->contents + h->plt.offset + 28);
3234
3235       /* Fill in the entry in the global offset table.
3236          Points to instruction after GOT offset.  */
3237       bfd_put_32 (output_bfd,
3238                   (htab->splt->output_section->vma
3239                    + htab->splt->output_offset
3240                    + h->plt.offset
3241                    + 12),
3242                   htab->sgotplt->contents + got_offset);
3243
3244       /* Fill in the entry in the .rela.plt section.  */
3245       rela.r_offset = (htab->sgotplt->output_section->vma
3246                        + htab->sgotplt->output_offset
3247                        + got_offset);
3248       rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3249       rela.r_addend = 0;
3250       loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3251       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3252
3253       if (!h->def_regular)
3254         {
3255           /* Mark the symbol as undefined, rather than as defined in
3256              the .plt section.  Leave the value alone.  This is a clue
3257              for the dynamic linker, to make function pointer
3258              comparisons work between an application and shared
3259              library.  */
3260           sym->st_shndx = SHN_UNDEF;
3261         }
3262     }
3263
3264   if (h->got.offset != (bfd_vma) -1
3265       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3266       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3267       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3268     {
3269       Elf_Internal_Rela rela;
3270       bfd_byte *loc;
3271
3272       /* This symbol has an entry in the global offset table.  Set it
3273          up.  */
3274
3275       if (htab->sgot == NULL || htab->srelgot == NULL)
3276         abort ();
3277
3278       rela.r_offset = (htab->sgot->output_section->vma
3279                        + htab->sgot->output_offset
3280                        + (h->got.offset &~ (bfd_vma) 1));
3281
3282       /* If this is a static link, or it is a -Bsymbolic link and the
3283          symbol is defined locally or was forced to be local because
3284          of a version file, we just want to emit a RELATIVE reloc.
3285          The entry in the global offset table will already have been
3286          initialized in the relocate_section function.  */
3287       if (info->shared
3288           && (info->symbolic
3289               || h->dynindx == -1
3290               || h->forced_local)
3291           && h->def_regular)
3292         {
3293           BFD_ASSERT((h->got.offset & 1) != 0);
3294           rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3295           rela.r_addend = (h->root.u.def.value
3296                            + h->root.u.def.section->output_section->vma
3297                            + h->root.u.def.section->output_offset);
3298         }
3299       else
3300         {
3301           BFD_ASSERT((h->got.offset & 1) == 0);
3302           bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3303           rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3304           rela.r_addend = 0;
3305         }
3306
3307       loc = htab->srelgot->contents;
3308       loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3309       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3310     }
3311
3312   if (h->needs_copy)
3313     {
3314       Elf_Internal_Rela rela;
3315       bfd_byte *loc;
3316
3317       /* This symbols needs a copy reloc.  Set it up.  */
3318
3319       if (h->dynindx == -1
3320           || (h->root.type != bfd_link_hash_defined
3321               && h->root.type != bfd_link_hash_defweak)
3322           || htab->srelbss == NULL)
3323         abort ();
3324
3325       rela.r_offset = (h->root.u.def.value
3326                        + h->root.u.def.section->output_section->vma
3327                        + h->root.u.def.section->output_offset);
3328       rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3329       rela.r_addend = 0;
3330       loc = htab->srelbss->contents;
3331       loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3332       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3333     }
3334
3335   /* Mark some specially defined symbols as absolute.  */
3336   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3337       || h == htab->elf.hgot
3338       || h == htab->elf.hplt)
3339     sym->st_shndx = SHN_ABS;
3340
3341   return TRUE;
3342 }
3343
3344 /* Used to decide how to sort relocs in an optimal manner for the
3345    dynamic linker, before writing them out.  */
3346
3347 static enum elf_reloc_type_class
3348 elf_s390_reloc_type_class (rela)
3349      const Elf_Internal_Rela *rela;
3350 {
3351   switch ((int) ELF32_R_TYPE (rela->r_info))
3352     {
3353     case R_390_RELATIVE:
3354       return reloc_class_relative;
3355     case R_390_JMP_SLOT:
3356       return reloc_class_plt;
3357     case R_390_COPY:
3358       return reloc_class_copy;
3359     default:
3360       return reloc_class_normal;
3361     }
3362 }
3363
3364 /* Finish up the dynamic sections.  */
3365
3366 static bfd_boolean
3367 elf_s390_finish_dynamic_sections (output_bfd, info)
3368      bfd *output_bfd;
3369      struct bfd_link_info *info;
3370 {
3371   struct elf_s390_link_hash_table *htab;
3372   bfd *dynobj;
3373   asection *sdyn;
3374
3375   htab = elf_s390_hash_table (info);
3376   dynobj = htab->elf.dynobj;
3377   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3378
3379   if (htab->elf.dynamic_sections_created)
3380     {
3381       Elf32_External_Dyn *dyncon, *dynconend;
3382
3383       if (sdyn == NULL || htab->sgot == NULL)
3384         abort ();
3385
3386       dyncon = (Elf32_External_Dyn *) sdyn->contents;
3387       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3388       for (; dyncon < dynconend; dyncon++)
3389         {
3390           Elf_Internal_Dyn dyn;
3391           asection *s;
3392
3393           bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3394
3395           switch (dyn.d_tag)
3396             {
3397             default:
3398               continue;
3399
3400             case DT_PLTGOT:
3401               dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3402               break;
3403
3404             case DT_JMPREL:
3405               dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3406               break;
3407
3408             case DT_PLTRELSZ:
3409               s = htab->srelplt->output_section;
3410               dyn.d_un.d_val = s->size;
3411               break;
3412             }
3413
3414           bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3415         }
3416
3417       /* Fill in the special first entry in the procedure linkage table.  */
3418       if (htab->splt && htab->splt->size > 0)
3419         {
3420           memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3421           if (info->shared)
3422             {
3423               bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3424                           htab->splt->contents );
3425               bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3426                           htab->splt->contents +4 );
3427               bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3428                           htab->splt->contents +8 );
3429               bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3430                           htab->splt->contents +12 );
3431               bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3432                           htab->splt->contents +16 );
3433            }
3434           else
3435            {
3436               bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3437                           htab->splt->contents );
3438               bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3439                           htab->splt->contents +4 );
3440               bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3441                           htab->splt->contents +8 );
3442               bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3443                           htab->splt->contents +12 );
3444               bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3445                           htab->splt->contents +16 );
3446               bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3447                           htab->splt->contents +20 );
3448               bfd_put_32 (output_bfd,
3449                           htab->sgotplt->output_section->vma
3450                           + htab->sgotplt->output_offset,
3451                           htab->splt->contents + 24);
3452            }
3453           elf_section_data (htab->splt->output_section)
3454             ->this_hdr.sh_entsize = 4;
3455         }
3456
3457     }
3458
3459   if (htab->sgotplt)
3460     {
3461       /* Fill in the first three entries in the global offset table.  */
3462       if (htab->sgotplt->size > 0)
3463         {
3464           bfd_put_32 (output_bfd,
3465                       (sdyn == NULL ? (bfd_vma) 0
3466                        : sdyn->output_section->vma + sdyn->output_offset),
3467                       htab->sgotplt->contents);
3468           /* One entry for shared object struct ptr.  */
3469           bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3470           /* One entry for _dl_runtime_resolve.  */
3471           bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3472         }
3473
3474       elf_section_data (htab->sgotplt->output_section)
3475         ->this_hdr.sh_entsize = 4;
3476     }
3477   return TRUE;
3478 }
3479
3480 static bfd_boolean
3481 elf_s390_grok_prstatus (abfd, note)
3482      bfd * abfd;
3483      Elf_Internal_Note * note;
3484 {
3485   int offset;
3486   unsigned int size;
3487
3488   switch (note->descsz)
3489     {
3490       default:
3491         return FALSE;
3492
3493       case 224:         /* S/390 Linux.  */
3494         /* pr_cursig */
3495         elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3496
3497         /* pr_pid */
3498         elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3499
3500         /* pr_reg */
3501         offset = 72;
3502         size = 144;
3503         break;
3504     }
3505
3506   /* Make a ".reg/999" section.  */
3507   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3508                                           size, note->descpos + offset);
3509 }
3510
3511 /* Return address for Ith PLT stub in section PLT, for relocation REL
3512    or (bfd_vma) -1 if it should not be included.  */
3513
3514 static bfd_vma
3515 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3516                       const arelent *rel ATTRIBUTE_UNUSED)
3517 {
3518   return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3519 }
3520
3521
3522 #define TARGET_BIG_SYM  bfd_elf32_s390_vec
3523 #define TARGET_BIG_NAME "elf32-s390"
3524 #define ELF_ARCH        bfd_arch_s390
3525 #define ELF_MACHINE_CODE EM_S390
3526 #define ELF_MACHINE_ALT1 EM_S390_OLD
3527 #define ELF_MAXPAGESIZE 0x1000
3528
3529 #define elf_backend_can_gc_sections     1
3530 #define elf_backend_can_refcount        1
3531 #define elf_backend_want_got_plt        1
3532 #define elf_backend_plt_readonly        1
3533 #define elf_backend_want_plt_sym        0
3534 #define elf_backend_got_header_size     12
3535 #define elf_backend_rela_normal         1
3536
3537 #define elf_info_to_howto                     elf_s390_info_to_howto
3538
3539 #define bfd_elf32_bfd_is_local_label_name     elf_s390_is_local_label_name
3540 #define bfd_elf32_bfd_link_hash_table_create  elf_s390_link_hash_table_create
3541 #define bfd_elf32_bfd_reloc_type_lookup       elf_s390_reloc_type_lookup
3542
3543 #define elf_backend_adjust_dynamic_symbol     elf_s390_adjust_dynamic_symbol
3544 #define elf_backend_check_relocs              elf_s390_check_relocs
3545 #define elf_backend_copy_indirect_symbol      elf_s390_copy_indirect_symbol
3546 #define elf_backend_create_dynamic_sections   elf_s390_create_dynamic_sections
3547 #define elf_backend_finish_dynamic_sections   elf_s390_finish_dynamic_sections
3548 #define elf_backend_finish_dynamic_symbol     elf_s390_finish_dynamic_symbol
3549 #define elf_backend_gc_mark_hook              elf_s390_gc_mark_hook
3550 #define elf_backend_gc_sweep_hook             elf_s390_gc_sweep_hook
3551 #define elf_backend_reloc_type_class          elf_s390_reloc_type_class
3552 #define elf_backend_relocate_section          elf_s390_relocate_section
3553 #define elf_backend_size_dynamic_sections     elf_s390_size_dynamic_sections
3554 #define elf_backend_init_index_section        _bfd_elf_init_1_index_section
3555 #define elf_backend_reloc_type_class          elf_s390_reloc_type_class
3556 #define elf_backend_grok_prstatus             elf_s390_grok_prstatus
3557 #define elf_backend_plt_sym_val               elf_s390_plt_sym_val
3558
3559 #define bfd_elf32_mkobject              elf_s390_mkobject
3560 #define elf_backend_object_p            elf_s390_object_p
3561
3562 #include "elf32-target.h"