bfd/elf64-s390.c

   1 /* IBM S/390-specific support for 64-bit ELF
   2    Copyright (C) 2000-2019 Free Software Foundation, Inc.
   3    Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "bfdlink.h"
  25 #include "libbfd.h"
  26 #include "elf-bfd.h"
  27 #include "elf/s390.h"
  28 #include "elf-s390.h"
  29 #include <stdarg.h>
  30
  31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
  32    from smaller values.  Start with zero, widen, *then* decrement.  */
  33 #define MINUS_ONE      (((bfd_vma)0) - 1)
  34
  35 static bfd_reloc_status_type
  36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
  37                 asection *, bfd *, char **);
  38 static bfd_reloc_status_type
  39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
  40                       asection *, bfd *, char **);
  41
  42 /* The relocation "howto" table.  */
  43 static reloc_howto_type elf_howto_table[] =
  44 {
  45   HOWTO (R_390_NONE,            /* type */
  46          0,                     /* rightshift */
  47          3,                     /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
  48          0,                     /* bitsize */
  49          FALSE,                 /* pc_relative */
  50          0,                     /* bitpos */
  51          complain_overflow_dont, /* complain_on_overflow */
  52          bfd_elf_generic_reloc, /* special_function */
  53          "R_390_NONE",          /* name */
  54          FALSE,                 /* partial_inplace */
  55          0,                     /* src_mask */
  56          0,                     /* dst_mask */
  57          FALSE),                /* pcrel_offset */
  58
  59   HOWTO(R_390_8,         0, 0,  8, FALSE, 0, complain_overflow_bitfield,
  60         bfd_elf_generic_reloc, "R_390_8",        FALSE, 0,0x000000ff, FALSE),
  61   HOWTO(R_390_12,        0, 1, 12, FALSE, 0, complain_overflow_dont,
  62         bfd_elf_generic_reloc, "R_390_12",       FALSE, 0,0x00000fff, FALSE),
  63   HOWTO(R_390_16,        0, 1, 16, FALSE, 0, complain_overflow_bitfield,
  64         bfd_elf_generic_reloc, "R_390_16",       FALSE, 0,0x0000ffff, FALSE),
  65   HOWTO(R_390_32,        0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  66         bfd_elf_generic_reloc, "R_390_32",       FALSE, 0,0xffffffff, FALSE),
  67   HOWTO(R_390_PC32,      0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
  68         bfd_elf_generic_reloc, "R_390_PC32",     FALSE, 0,0xffffffff, TRUE),
  69   HOWTO(R_390_GOT12,     0, 1, 12, FALSE, 0, complain_overflow_bitfield,
  70         bfd_elf_generic_reloc, "R_390_GOT12",    FALSE, 0,0x00000fff, FALSE),
  71   HOWTO(R_390_GOT32,     0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  72         bfd_elf_generic_reloc, "R_390_GOT32",    FALSE, 0,0xffffffff, FALSE),
  73   HOWTO(R_390_PLT32,     0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
  74         bfd_elf_generic_reloc, "R_390_PLT32",    FALSE, 0,0xffffffff, TRUE),
  75   HOWTO(R_390_COPY,      0, 4, 64, FALSE, 0, complain_overflow_bitfield,
  76         bfd_elf_generic_reloc, "R_390_COPY",     FALSE, 0,MINUS_ONE,  FALSE),
  77   HOWTO(R_390_GLOB_DAT,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
  78         bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE,  FALSE),
  79   HOWTO(R_390_JMP_SLOT,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
  80         bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE,  FALSE),
  81   HOWTO(R_390_RELATIVE,  0, 4, 64,  TRUE, 0, complain_overflow_bitfield,
  82         bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE,  FALSE),
  83   HOWTO(R_390_GOTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
  84         bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE,  FALSE),
  85   HOWTO(R_390_GOTPC,     0, 4, 64,  TRUE, 0, complain_overflow_bitfield,
  86         bfd_elf_generic_reloc, "R_390_GOTPC",    FALSE, 0,MINUS_ONE,  TRUE),
  87   HOWTO(R_390_GOT16,     0, 1, 16, FALSE, 0, complain_overflow_bitfield,
  88         bfd_elf_generic_reloc, "R_390_GOT16",    FALSE, 0,0x0000ffff, FALSE),
  89   HOWTO(R_390_PC16,      0, 1, 16,  TRUE, 0, complain_overflow_bitfield,
  90         bfd_elf_generic_reloc, "R_390_PC16",     FALSE, 0,0x0000ffff, TRUE),
  91   HOWTO(R_390_PC16DBL,   1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
  92         bfd_elf_generic_reloc, "R_390_PC16DBL",  FALSE, 0,0x0000ffff, TRUE),
  93   HOWTO(R_390_PLT16DBL,  1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
  94         bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
  95   HOWTO(R_390_PC32DBL,   1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
  96         bfd_elf_generic_reloc, "R_390_PC32DBL",  FALSE, 0,0xffffffff, TRUE),
  97   HOWTO(R_390_PLT32DBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
  98         bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
  99   HOWTO(R_390_GOTPCDBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 100         bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE,  TRUE),
 101   HOWTO(R_390_64,        0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 102         bfd_elf_generic_reloc, "R_390_64",       FALSE, 0,MINUS_ONE,  FALSE),
 103   HOWTO(R_390_PC64,      0, 4, 64,  TRUE, 0, complain_overflow_bitfield,
 104         bfd_elf_generic_reloc, "R_390_PC64",     FALSE, 0,MINUS_ONE,  TRUE),
 105   HOWTO(R_390_GOT64,     0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 106         bfd_elf_generic_reloc, "R_390_GOT64",    FALSE, 0,MINUS_ONE,  FALSE),
 107   HOWTO(R_390_PLT64,     0, 4, 64,  TRUE, 0, complain_overflow_bitfield,
 108         bfd_elf_generic_reloc, "R_390_PLT64",    FALSE, 0,MINUS_ONE,  TRUE),
 109   HOWTO(R_390_GOTENT,    1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 110         bfd_elf_generic_reloc, "R_390_GOTENT",   FALSE, 0,MINUS_ONE,  TRUE),
 111   HOWTO(R_390_GOTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 112         bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
 113   HOWTO(R_390_GOTOFF64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 114         bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE,  FALSE),
 115   HOWTO(R_390_GOTPLT12,  0, 1, 12, FALSE, 0, complain_overflow_dont,
 116         bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
 117   HOWTO(R_390_GOTPLT16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 118         bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
 119   HOWTO(R_390_GOTPLT32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 120         bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
 121   HOWTO(R_390_GOTPLT64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 122         bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE,  FALSE),
 123   HOWTO(R_390_GOTPLTENT, 1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
 124         bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE,  TRUE),
 125   HOWTO(R_390_PLTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
 126         bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
 127   HOWTO(R_390_PLTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 128         bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
 129   HOWTO(R_390_PLTOFF64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 130         bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE,  FALSE),
 131   HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 132         s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
 133   HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 134         s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
 135   HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
 136         s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
 137   EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32.  */
 138   HOWTO(R_390_TLS_GD64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 139         bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
 140   HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
 141         bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
 142   EMPTY_HOWTO (R_390_TLS_GOTIE32),      /* Empty entry for R_390_TLS_GOTIE32.  */
 143   HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 144         bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
 145   EMPTY_HOWTO (R_390_TLS_LDM32),        /* Empty entry for R_390_TLS_LDM32.  */
 146   HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 147         bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
 148   EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32.  */
 149   HOWTO(R_390_TLS_IE64,  0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 150         bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
 151   HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
 152         bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
 153   EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32.  */
 154   HOWTO(R_390_TLS_LE64,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 155         bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
 156   EMPTY_HOWTO (R_390_TLS_LDO32),        /* Empty entry for R_390_TLS_LDO32.  */
 157   HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 158         bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
 159   HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 160         bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
 161   HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 162         bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
 163   HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 164         bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
 165   HOWTO(R_390_20,        0, 2, 20, FALSE, 8, complain_overflow_dont,
 166         s390_elf_ldisp_reloc, "R_390_20",      FALSE, 0,0x0fffff00, FALSE),
 167   HOWTO(R_390_GOT20,     0, 2, 20, FALSE, 8, complain_overflow_dont,
 168         s390_elf_ldisp_reloc, "R_390_GOT20",   FALSE, 0,0x0fffff00, FALSE),
 169   HOWTO(R_390_GOTPLT20,  0, 2, 20, FALSE, 8, complain_overflow_dont,
 170         s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
 171   HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
 172         s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
 173   HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
 174         bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
 175   HOWTO(R_390_PC12DBL,   1, 1, 12,  TRUE, 0, complain_overflow_bitfield,
 176         bfd_elf_generic_reloc, "R_390_PC12DBL",  FALSE, 0,0x00000fff, TRUE),
 177   HOWTO(R_390_PLT12DBL,  1, 1, 12,  TRUE, 0, complain_overflow_bitfield,
 178         bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
 179   HOWTO(R_390_PC24DBL,   1, 2, 24,  TRUE, 0, complain_overflow_bitfield,
 180         bfd_elf_generic_reloc, "R_390_PC24DBL",  FALSE, 0,0x00ffffff, TRUE),
 181   HOWTO(R_390_PLT24DBL,  1, 2, 24,  TRUE, 0, complain_overflow_bitfield,
 182         bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
 183 };
 184
 185 /* GNU extension to record C++ vtable hierarchy.  */
 186 static reloc_howto_type elf64_s390_vtinherit_howto =
 187   HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
 188 static reloc_howto_type elf64_s390_vtentry_howto =
 189   HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
 190
 191 static reloc_howto_type *
 192 elf_s390_reloc_type_lookup (bfd *abfd,
 193                             bfd_reloc_code_real_type code)
 194 {
 195   switch (code)
 196     {
 197     case BFD_RELOC_NONE:
 198       return &elf_howto_table[(int) R_390_NONE];
 199     case BFD_RELOC_8:
 200       return &elf_howto_table[(int) R_390_8];
 201     case BFD_RELOC_390_12:
 202       return &elf_howto_table[(int) R_390_12];
 203     case BFD_RELOC_16:
 204       return &elf_howto_table[(int) R_390_16];
 205     case BFD_RELOC_32:
 206       return &elf_howto_table[(int) R_390_32];
 207     case BFD_RELOC_CTOR:
 208       return &elf_howto_table[(int) R_390_32];
 209     case BFD_RELOC_32_PCREL:
 210       return &elf_howto_table[(int) R_390_PC32];
 211     case BFD_RELOC_390_GOT12:
 212       return &elf_howto_table[(int) R_390_GOT12];
 213     case BFD_RELOC_32_GOT_PCREL:
 214       return &elf_howto_table[(int) R_390_GOT32];
 215     case BFD_RELOC_390_PLT32:
 216       return &elf_howto_table[(int) R_390_PLT32];
 217     case BFD_RELOC_390_COPY:
 218       return &elf_howto_table[(int) R_390_COPY];
 219     case BFD_RELOC_390_GLOB_DAT:
 220       return &elf_howto_table[(int) R_390_GLOB_DAT];
 221     case BFD_RELOC_390_JMP_SLOT:
 222       return &elf_howto_table[(int) R_390_JMP_SLOT];
 223     case BFD_RELOC_390_RELATIVE:
 224       return &elf_howto_table[(int) R_390_RELATIVE];
 225     case BFD_RELOC_32_GOTOFF:
 226       return &elf_howto_table[(int) R_390_GOTOFF32];
 227     case BFD_RELOC_390_GOTPC:
 228       return &elf_howto_table[(int) R_390_GOTPC];
 229     case BFD_RELOC_390_GOT16:
 230       return &elf_howto_table[(int) R_390_GOT16];
 231     case BFD_RELOC_16_PCREL:
 232       return &elf_howto_table[(int) R_390_PC16];
 233     case BFD_RELOC_390_PC12DBL:
 234       return &elf_howto_table[(int) R_390_PC12DBL];
 235     case BFD_RELOC_390_PLT12DBL:
 236       return &elf_howto_table[(int) R_390_PLT12DBL];
 237     case BFD_RELOC_390_PC16DBL:
 238       return &elf_howto_table[(int) R_390_PC16DBL];
 239     case BFD_RELOC_390_PLT16DBL:
 240       return &elf_howto_table[(int) R_390_PLT16DBL];
 241     case BFD_RELOC_390_PC24DBL:
 242       return &elf_howto_table[(int) R_390_PC24DBL];
 243     case BFD_RELOC_390_PLT24DBL:
 244       return &elf_howto_table[(int) R_390_PLT24DBL];
 245     case BFD_RELOC_390_PC32DBL:
 246       return &elf_howto_table[(int) R_390_PC32DBL];
 247     case BFD_RELOC_390_PLT32DBL:
 248       return &elf_howto_table[(int) R_390_PLT32DBL];
 249     case BFD_RELOC_390_GOTPCDBL:
 250       return &elf_howto_table[(int) R_390_GOTPCDBL];
 251     case BFD_RELOC_64:
 252       return &elf_howto_table[(int) R_390_64];
 253     case BFD_RELOC_64_PCREL:
 254       return &elf_howto_table[(int) R_390_PC64];
 255     case BFD_RELOC_390_GOT64:
 256       return &elf_howto_table[(int) R_390_GOT64];
 257     case BFD_RELOC_390_PLT64:
 258       return &elf_howto_table[(int) R_390_PLT64];
 259     case BFD_RELOC_390_GOTENT:
 260       return &elf_howto_table[(int) R_390_GOTENT];
 261     case BFD_RELOC_16_GOTOFF:
 262       return &elf_howto_table[(int) R_390_GOTOFF16];
 263     case BFD_RELOC_390_GOTOFF64:
 264       return &elf_howto_table[(int) R_390_GOTOFF64];
 265     case BFD_RELOC_390_GOTPLT12:
 266       return &elf_howto_table[(int) R_390_GOTPLT12];
 267     case BFD_RELOC_390_GOTPLT16:
 268       return &elf_howto_table[(int) R_390_GOTPLT16];
 269     case BFD_RELOC_390_GOTPLT32:
 270       return &elf_howto_table[(int) R_390_GOTPLT32];
 271     case BFD_RELOC_390_GOTPLT64:
 272       return &elf_howto_table[(int) R_390_GOTPLT64];
 273     case BFD_RELOC_390_GOTPLTENT:
 274       return &elf_howto_table[(int) R_390_GOTPLTENT];
 275     case BFD_RELOC_390_PLTOFF16:
 276       return &elf_howto_table[(int) R_390_PLTOFF16];
 277     case BFD_RELOC_390_PLTOFF32:
 278       return &elf_howto_table[(int) R_390_PLTOFF32];
 279     case BFD_RELOC_390_PLTOFF64:
 280       return &elf_howto_table[(int) R_390_PLTOFF64];
 281     case BFD_RELOC_390_TLS_LOAD:
 282       return &elf_howto_table[(int) R_390_TLS_LOAD];
 283     case BFD_RELOC_390_TLS_GDCALL:
 284       return &elf_howto_table[(int) R_390_TLS_GDCALL];
 285     case BFD_RELOC_390_TLS_LDCALL:
 286       return &elf_howto_table[(int) R_390_TLS_LDCALL];
 287     case BFD_RELOC_390_TLS_GD64:
 288       return &elf_howto_table[(int) R_390_TLS_GD64];
 289     case BFD_RELOC_390_TLS_GOTIE12:
 290       return &elf_howto_table[(int) R_390_TLS_GOTIE12];
 291     case BFD_RELOC_390_TLS_GOTIE64:
 292       return &elf_howto_table[(int) R_390_TLS_GOTIE64];
 293     case BFD_RELOC_390_TLS_LDM64:
 294       return &elf_howto_table[(int) R_390_TLS_LDM64];
 295     case BFD_RELOC_390_TLS_IE64:
 296       return &elf_howto_table[(int) R_390_TLS_IE64];
 297     case BFD_RELOC_390_TLS_IEENT:
 298       return &elf_howto_table[(int) R_390_TLS_IEENT];
 299     case BFD_RELOC_390_TLS_LE64:
 300       return &elf_howto_table[(int) R_390_TLS_LE64];
 301     case BFD_RELOC_390_TLS_LDO64:
 302       return &elf_howto_table[(int) R_390_TLS_LDO64];
 303     case BFD_RELOC_390_TLS_DTPMOD:
 304       return &elf_howto_table[(int) R_390_TLS_DTPMOD];
 305     case BFD_RELOC_390_TLS_DTPOFF:
 306       return &elf_howto_table[(int) R_390_TLS_DTPOFF];
 307     case BFD_RELOC_390_TLS_TPOFF:
 308       return &elf_howto_table[(int) R_390_TLS_TPOFF];
 309     case BFD_RELOC_390_20:
 310       return &elf_howto_table[(int) R_390_20];
 311     case BFD_RELOC_390_GOT20:
 312       return &elf_howto_table[(int) R_390_GOT20];
 313     case BFD_RELOC_390_GOTPLT20:
 314       return &elf_howto_table[(int) R_390_GOTPLT20];
 315     case BFD_RELOC_390_TLS_GOTIE20:
 316       return &elf_howto_table[(int) R_390_TLS_GOTIE20];
 317     case BFD_RELOC_390_IRELATIVE:
 318       return &elf_howto_table[(int) R_390_IRELATIVE];
 319     case BFD_RELOC_VTABLE_INHERIT:
 320       return &elf64_s390_vtinherit_howto;
 321     case BFD_RELOC_VTABLE_ENTRY:
 322       return &elf64_s390_vtentry_howto;
 323     default:
 324       break;
 325     }
 326
 327   /* xgettext:c-format */
 328   _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
 329   bfd_set_error (bfd_error_bad_value);
 330   return NULL;
 331 }
 332
 333 static reloc_howto_type *
 334 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 335                             const char *r_name)
 336 {
 337   unsigned int i;
 338
 339   for (i = 0;
 340        i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
 341        i++)
 342     if (elf_howto_table[i].name != NULL
 343         && strcasecmp (elf_howto_table[i].name, r_name) == 0)
 344       return &elf_howto_table[i];
 345
 346   if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
 347     return &elf64_s390_vtinherit_howto;
 348   if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
 349     return &elf64_s390_vtentry_howto;
 350
 351   return NULL;
 352 }
 353
 354 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
 355    and elf64-s390.c has its own copy.  */
 356
 357 static bfd_boolean
 358 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
 359                         arelent *cache_ptr,
 360                         Elf_Internal_Rela *dst)
 361 {
 362   unsigned int r_type = ELF64_R_TYPE(dst->r_info);
 363
 364   switch (r_type)
 365     {
 366     case R_390_GNU_VTINHERIT:
 367       cache_ptr->howto = &elf64_s390_vtinherit_howto;
 368       break;
 369
 370     case R_390_GNU_VTENTRY:
 371       cache_ptr->howto = &elf64_s390_vtentry_howto;
 372       break;
 373
 374     default:
 375       if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
 376         {
 377           /* xgettext:c-format */
 378           _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
 379                               abfd, r_type);
 380           bfd_set_error (bfd_error_bad_value);
 381           return FALSE;
 382         }
 383       cache_ptr->howto = &elf_howto_table[r_type];
 384     }
 385   return TRUE;
 386 }
 387
 388 /* A relocation function which doesn't do anything.  */
 389 static bfd_reloc_status_type
 390 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
 391                 arelent *reloc_entry,
 392                 asymbol *symbol ATTRIBUTE_UNUSED,
 393                 void * data ATTRIBUTE_UNUSED,
 394                 asection *input_section,
 395                 bfd *output_bfd,
 396                 char **error_message ATTRIBUTE_UNUSED)
 397 {
 398   if (output_bfd)
 399     reloc_entry->address += input_section->output_offset;
 400   return bfd_reloc_ok;
 401 }
 402
 403 /* Handle the large displacement relocs.  */
 404 static bfd_reloc_status_type
 405 s390_elf_ldisp_reloc (bfd *abfd,
 406                       arelent *reloc_entry,
 407                       asymbol *symbol,
 408                       void * data,
 409                       asection *input_section,
 410                       bfd *output_bfd,
 411                       char **error_message ATTRIBUTE_UNUSED)
 412 {
 413   reloc_howto_type *howto = reloc_entry->howto;
 414   bfd_vma relocation;
 415   bfd_vma insn;
 416
 417   if (output_bfd != (bfd *) NULL
 418       && (symbol->flags & BSF_SECTION_SYM) == 0
 419       && (! howto->partial_inplace
 420           || reloc_entry->addend == 0))
 421     {
 422       reloc_entry->address += input_section->output_offset;
 423       return bfd_reloc_ok;
 424     }
 425   if (output_bfd != NULL)
 426     return bfd_reloc_continue;
 427
 428   if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
 429     return bfd_reloc_outofrange;
 430
 431   relocation = (symbol->value
 432                 + symbol->section->output_section->vma
 433                 + symbol->section->output_offset);
 434   relocation += reloc_entry->addend;
 435   if (howto->pc_relative)
 436     {
 437       relocation -= (input_section->output_section->vma
 438                      + input_section->output_offset);
 439       relocation -= reloc_entry->address;
 440     }
 441
 442   insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
 443   insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
 444   bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
 445
 446   if ((bfd_signed_vma) relocation < - 0x80000
 447       || (bfd_signed_vma) relocation > 0x7ffff)
 448     return bfd_reloc_overflow;
 449   else
 450     return bfd_reloc_ok;
 451 }
 452
 453 static bfd_boolean
 454 elf_s390_is_local_label_name (bfd *abfd, const char *name)
 455 {
 456   if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
 457     return TRUE;
 458
 459   return _bfd_elf_is_local_label_name (abfd, name);
 460 }
 461
 462 /* Functions for the 390 ELF linker.  */
 463
 464 /* The name of the dynamic interpreter.  This is put in the .interp
 465    section.  */
 466
 467 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
 468
 469 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
 470    copying dynamic variables from a shared lib into an app's dynbss
 471    section, and instead use a dynamic relocation to point into the
 472    shared lib.  */
 473 #define ELIMINATE_COPY_RELOCS 1
 474
 475 /* The size in bytes of the first entry in the procedure linkage table.  */
 476 #define PLT_FIRST_ENTRY_SIZE 32
 477 /* The size in bytes of an entry in the procedure linkage table.  */
 478 #define PLT_ENTRY_SIZE 32
 479
 480 #define GOT_ENTRY_SIZE 8
 481
 482 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
 483
 484 /* The first three entries in a global offset table are reserved,
 485    and the initial contents are unimportant (we zero them out).
 486    Subsequent entries look like this.  See the SVR4 ABI 386
 487    supplement to see how this works.  */
 488
 489 /* For the s390, simple addr offset can only be 0 - 4096.
 490    To use the full 16777216 TB address space, several instructions
 491    are needed to load an address in a register and execute
 492    a branch( or just saving the address)
 493
 494    Furthermore, only r 0 and 1 are free to use!!!  */
 495
 496 /* The first 3 words in the GOT are then reserved.
 497    Word 0 is the address of the dynamic table.
 498    Word 1 is a pointer to a structure describing the object
 499    Word 2 is used to point to the loader entry address.
 500
 501    The code for PLT entries looks like this:
 502
 503    The GOT holds the address in the PLT to be executed.
 504    The loader then gets:
 505    48(15) =  Pointer to the structure describing the object.
 506    56(15) =  Offset in symbol table
 507    The loader  must  then find the module where the function is
 508    and insert the address in the GOT.
 509
 510    PLT1: LARL 1,<fn>@GOTENT # 6 bytes  Load address of GOT entry in r1
 511          LG   1,0(1)      # 6 bytes  Load address from GOT in r1
 512          BCR  15,1        # 2 bytes  Jump to address
 513    RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
 514          LGF  1,12(1)     # 6 bytes  Load rela.plt offset into r1
 515          BRCL 15,-x       # 6 bytes  Jump to first PLT entry
 516          .long ?          # 4 bytes  offset into .rela.plt
 517
 518    Total = 32 bytes per PLT entry
 519    Fixup at offset 2: relative address to GOT entry
 520    Fixup at offset 22: relative branch to PLT0
 521    Fixup at offset 28: 32 bit offset into .rela.plt
 522
 523    A 32 bit offset into the symbol table is enough. It allows for
 524    .rela.plt sections up to a size of 2 gigabyte.  A single dynamic
 525    object (the main program, any shared library) is limited to 4GB in
 526    size.  Having a .rela.plt of 2GB would already make the .plt
 527    section bigger than 8GB.  */
 528
 529 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
 530   {
 531     0xc0, 0x10, 0x00, 0x00, 0x00, 0x00,     /* larl    %r1,.       */
 532     0xe3, 0x10, 0x10, 0x00, 0x00, 0x04,     /* lg      %r1,0(%r1)  */
 533     0x07, 0xf1,                             /* br      %r1         */
 534     0x0d, 0x10,                             /* basr    %r1,%r0     */
 535     0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14,     /* lgf     %r1,12(%r1) */
 536     0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00,     /* jg      first plt   */
 537     0x00, 0x00, 0x00, 0x00                  /* .long   0x00000000  */
 538   };
 539
 540 /* The first PLT entry pushes the offset into the symbol table
 541    from R1 onto the stack at 56(15) and the loader object info
 542    at 48(15), loads the loader address in R1 and jumps to it.  */
 543
 544 /* The first entry in the PLT:
 545
 546   PLT0:
 547      STG  1,56(15)  # r1 contains the offset into the symbol table
 548      LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
 549      MVC  48(8,15),8(1) # move loader ino (object struct address) to stack
 550      LG   1,16(1)   # get entry address of loader
 551      BCR  15,1      # jump to loader
 552
 553      Fixup at offset 8: relative address to start of GOT.  */
 554
 555 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
 556   {
 557     0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24,     /* stg     %r1,56(%r15)      */
 558     0xc0, 0x10, 0x00, 0x00, 0x00, 0x00,     /* larl    %r1,.             */
 559     0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08,     /* mvc     48(8,%r15),8(%r1) */
 560     0xe3, 0x10, 0x10, 0x10, 0x00, 0x04,     /* lg      %r1,16(%r1)       */
 561     0x07, 0xf1,                             /* br      %r1               */
 562     0x07, 0x00,                             /* nopr    %r0               */
 563     0x07, 0x00,                             /* nopr    %r0               */
 564     0x07, 0x00                              /* nopr    %r0               */
 565   };
 566
 567
 568 /* s390 ELF linker hash entry.  */
 569
 570 struct elf_s390_link_hash_entry
 571 {
 572   struct elf_link_hash_entry elf;
 573
 574   /* Track dynamic relocs copied for this symbol.  */
 575   struct elf_dyn_relocs *dyn_relocs;
 576
 577   /* Number of GOTPLT references for a function.  */
 578   bfd_signed_vma gotplt_refcount;
 579
 580 #define GOT_UNKNOWN     0
 581 #define GOT_NORMAL      1
 582 #define GOT_TLS_GD      2
 583 #define GOT_TLS_IE      3
 584 #define GOT_TLS_IE_NLT  3
 585   unsigned char tls_type;
 586
 587   /* For pointer equality reasons we might need to change the symbol
 588      type from STT_GNU_IFUNC to STT_FUNC together with its value and
 589      section entry.  So after alloc_dynrelocs only these values should
 590      be used.  In order to check whether a symbol is IFUNC use
 591      s390_is_ifunc_symbol_p.  */
 592   bfd_vma ifunc_resolver_address;
 593   asection *ifunc_resolver_section;
 594 };
 595
 596 #define elf_s390_hash_entry(ent) \
 597   ((struct elf_s390_link_hash_entry *)(ent))
 598
 599 /* This structure represents an entry in the local PLT list needed for
 600    local IFUNC symbols.  */
 601 struct plt_entry
 602 {
 603   /* The section of the local symbol.
 604      Set in relocate_section and used in finish_dynamic_sections.  */
 605   asection *sec;
 606
 607   union
 608     {
 609       bfd_signed_vma refcount;
 610       bfd_vma offset;
 611     } plt;
 612 };
 613
 614 /* NOTE: Keep this structure in sync with
 615    the one declared in elf32-s390.c.  */
 616 struct elf_s390_obj_tdata
 617 {
 618   struct elf_obj_tdata root;
 619
 620   /* A local PLT is needed for ifunc symbols.  */
 621   struct plt_entry *local_plt;
 622
 623   /* TLS type for each local got entry.  */
 624   char *local_got_tls_type;
 625 };
 626
 627 #define elf_s390_tdata(abfd) \
 628   ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
 629
 630 #define elf_s390_local_plt(abfd) \
 631   (elf_s390_tdata (abfd)->local_plt)
 632
 633 #define elf_s390_local_got_tls_type(abfd) \
 634   (elf_s390_tdata (abfd)->local_got_tls_type)
 635
 636 #define is_s390_elf(bfd)                                \
 637   (bfd_get_flavour (bfd) == bfd_target_elf_flavour      \
 638    && elf_tdata (bfd) != NULL                           \
 639    && elf_object_id (bfd) == S390_ELF_DATA)
 640
 641 static bfd_boolean
 642 elf_s390_mkobject (bfd *abfd)
 643 {
 644   return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
 645                                   S390_ELF_DATA);
 646 }
 647
 648 static bfd_boolean
 649 elf_s390_object_p (bfd *abfd)
 650 {
 651   /* Set the right machine number for an s390 elf32 file.  */
 652   return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
 653 }
 654
 655 /* s390 ELF linker hash table.  */
 656
 657 struct elf_s390_link_hash_table
 658 {
 659   struct elf_link_hash_table elf;
 660
 661   /* Short-cuts to get to dynamic linker sections.  */
 662   asection *irelifunc;
 663
 664   union {
 665     bfd_signed_vma refcount;
 666     bfd_vma offset;
 667   } tls_ldm_got;
 668
 669   /* Small local sym cache.  */
 670   struct sym_cache sym_cache;
 671
 672   /* Options passed from the linker.  */
 673   struct s390_elf_params *params;
 674 };
 675
 676 /* Get the s390 ELF linker hash table from a link_info structure.  */
 677
 678 #define elf_s390_hash_table(p)                                          \
 679   (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash))       \
 680    == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
 681
 682 #define ELF64 1
 683 #include "elf-s390-common.c"
 684
 685 /* Create an entry in an s390 ELF linker hash table.  */
 686
 687 static struct bfd_hash_entry *
 688 link_hash_newfunc (struct bfd_hash_entry *entry,
 689                    struct bfd_hash_table *table,
 690                    const char *string)
 691 {
 692   /* Allocate the structure if it has not already been allocated by a
 693      subclass.  */
 694   if (entry == NULL)
 695     {
 696       entry = bfd_hash_allocate (table,
 697                                  sizeof (struct elf_s390_link_hash_entry));
 698       if (entry == NULL)
 699         return entry;
 700     }
 701
 702   /* Call the allocation method of the superclass.  */
 703   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
 704   if (entry != NULL)
 705     {
 706       struct elf_s390_link_hash_entry *eh;
 707
 708       eh = (struct elf_s390_link_hash_entry *) entry;
 709       eh->dyn_relocs = NULL;
 710       eh->gotplt_refcount = 0;
 711       eh->tls_type = GOT_UNKNOWN;
 712       eh->ifunc_resolver_address = 0;
 713       eh->ifunc_resolver_section = NULL;
 714     }
 715
 716   return entry;
 717 }
 718
 719 /* Create an s390 ELF linker hash table.  */
 720
 721 static struct bfd_link_hash_table *
 722 elf_s390_link_hash_table_create (bfd *abfd)
 723 {
 724   struct elf_s390_link_hash_table *ret;
 725   bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
 726
 727   ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
 728   if (ret == NULL)
 729     return NULL;
 730
 731   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
 732                                       sizeof (struct elf_s390_link_hash_entry),
 733                                       S390_ELF_DATA))
 734     {
 735       free (ret);
 736       return NULL;
 737     }
 738
 739   return &ret->elf.root;
 740 }
 741
 742 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
 743
 744 static void
 745 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
 746                                struct elf_link_hash_entry *dir,
 747                                struct elf_link_hash_entry *ind)
 748 {
 749   struct elf_s390_link_hash_entry *edir, *eind;
 750
 751   edir = (struct elf_s390_link_hash_entry *) dir;
 752   eind = (struct elf_s390_link_hash_entry *) ind;
 753
 754   if (eind->dyn_relocs != NULL)
 755     {
 756       if (edir->dyn_relocs != NULL)
 757         {
 758           struct elf_dyn_relocs **pp;
 759           struct elf_dyn_relocs *p;
 760
 761           /* Add reloc counts against the indirect sym to the direct sym
 762              list.  Merge any entries against the same section.  */
 763           for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
 764             {
 765               struct elf_dyn_relocs *q;
 766
 767               for (q = edir->dyn_relocs; q != NULL; q = q->next)
 768                 if (q->sec == p->sec)
 769                   {
 770                     q->pc_count += p->pc_count;
 771                     q->count += p->count;
 772                     *pp = p->next;
 773                     break;
 774                   }
 775               if (q == NULL)
 776                 pp = &p->next;
 777             }
 778           *pp = edir->dyn_relocs;
 779         }
 780
 781       edir->dyn_relocs = eind->dyn_relocs;
 782       eind->dyn_relocs = NULL;
 783     }
 784
 785   if (ind->root.type == bfd_link_hash_indirect
 786       && dir->got.refcount <= 0)
 787     {
 788       edir->tls_type = eind->tls_type;
 789       eind->tls_type = GOT_UNKNOWN;
 790     }
 791
 792   if (ELIMINATE_COPY_RELOCS
 793       && ind->root.type != bfd_link_hash_indirect
 794       && dir->dynamic_adjusted)
 795     {
 796       /* If called to transfer flags for a weakdef during processing
 797          of elf_adjust_dynamic_symbol, don't copy non_got_ref.
 798          We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
 799       if (dir->versioned != versioned_hidden)
 800         dir->ref_dynamic |= ind->ref_dynamic;
 801       dir->ref_regular |= ind->ref_regular;
 802       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
 803       dir->needs_plt |= ind->needs_plt;
 804     }
 805   else
 806     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
 807 }
 808
 809 static int
 810 elf_s390_tls_transition (struct bfd_link_info *info,
 811                          int r_type,
 812                          int is_local)
 813 {
 814   if (bfd_link_pic (info))
 815     return r_type;
 816
 817   switch (r_type)
 818     {
 819     case R_390_TLS_GD64:
 820     case R_390_TLS_IE64:
 821       if (is_local)
 822         return R_390_TLS_LE64;
 823       return R_390_TLS_IE64;
 824     case R_390_TLS_GOTIE64:
 825       if (is_local)
 826         return R_390_TLS_LE64;
 827       return R_390_TLS_GOTIE64;
 828     case R_390_TLS_LDM64:
 829       return R_390_TLS_LE64;
 830     }
 831
 832   return r_type;
 833 }
 834
 835 /* Look through the relocs for a section during the first phase, and
 836    allocate space in the global offset table or procedure linkage
 837    table.  */
 838
 839 static bfd_boolean
 840 elf_s390_check_relocs (bfd *abfd,
 841                        struct bfd_link_info *info,
 842                        asection *sec,
 843                        const Elf_Internal_Rela *relocs)
 844 {
 845   struct elf_s390_link_hash_table *htab;
 846   Elf_Internal_Shdr *symtab_hdr;
 847   struct elf_link_hash_entry **sym_hashes;
 848   const Elf_Internal_Rela *rel;
 849   const Elf_Internal_Rela *rel_end;
 850   asection *sreloc;
 851   bfd_signed_vma *local_got_refcounts;
 852   int tls_type, old_tls_type;
 853
 854   if (bfd_link_relocatable (info))
 855     return TRUE;
 856
 857   BFD_ASSERT (is_s390_elf (abfd));
 858
 859   htab = elf_s390_hash_table (info);
 860   if (htab == NULL)
 861     return FALSE;
 862
 863   symtab_hdr = &elf_symtab_hdr (abfd);
 864   sym_hashes = elf_sym_hashes (abfd);
 865   local_got_refcounts = elf_local_got_refcounts (abfd);
 866
 867   sreloc = NULL;
 868
 869   rel_end = relocs + sec->reloc_count;
 870   for (rel = relocs; rel < rel_end; rel++)
 871     {
 872       unsigned int r_type;
 873       unsigned int r_symndx;
 874       struct elf_link_hash_entry *h;
 875       Elf_Internal_Sym *isym;
 876
 877       r_symndx = ELF64_R_SYM (rel->r_info);
 878
 879       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
 880         {
 881           /* xgettext:c-format */
 882           _bfd_error_handler (_("%pB: bad symbol index: %d"),
 883                               abfd, r_symndx);
 884           return FALSE;
 885         }
 886
 887       if (r_symndx < symtab_hdr->sh_info)
 888         {
 889           /* A local symbol.  */
 890           isym = bfd_sym_from_r_symndx (&htab->sym_cache,
 891                                         abfd, r_symndx);
 892           if (isym == NULL)
 893             return FALSE;
 894
 895           if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
 896             {
 897               struct plt_entry *plt;
 898
 899               if (htab->elf.dynobj == NULL)
 900                 htab->elf.dynobj = abfd;
 901
 902               if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
 903                 return FALSE;
 904
 905               if (local_got_refcounts == NULL)
 906                 {
 907                   if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
 908                     return FALSE;
 909                   local_got_refcounts = elf_local_got_refcounts (abfd);
 910                 }
 911               plt = elf_s390_local_plt (abfd);
 912               plt[r_symndx].plt.refcount++;
 913             }
 914           h = NULL;
 915         }
 916       else
 917         {
 918           h = sym_hashes[r_symndx - symtab_hdr->sh_info];
 919           while (h->root.type == bfd_link_hash_indirect
 920                  || h->root.type == bfd_link_hash_warning)
 921             h = (struct elf_link_hash_entry *) h->root.u.i.link;
 922         }
 923
 924       /* Create got section and local_got_refcounts array if they
 925          are needed.  */
 926       r_type = elf_s390_tls_transition (info,
 927                                         ELF64_R_TYPE (rel->r_info),
 928                                         h == NULL);
 929       switch (r_type)
 930         {
 931         case R_390_GOT12:
 932         case R_390_GOT16:
 933         case R_390_GOT20:
 934         case R_390_GOT32:
 935         case R_390_GOT64:
 936         case R_390_GOTENT:
 937         case R_390_GOTPLT12:
 938         case R_390_GOTPLT16:
 939         case R_390_GOTPLT20:
 940         case R_390_GOTPLT32:
 941         case R_390_GOTPLT64:
 942         case R_390_GOTPLTENT:
 943         case R_390_TLS_GD64:
 944         case R_390_TLS_GOTIE12:
 945         case R_390_TLS_GOTIE20:
 946         case R_390_TLS_GOTIE64:
 947         case R_390_TLS_IEENT:
 948         case R_390_TLS_IE64:
 949         case R_390_TLS_LDM64:
 950           if (h == NULL
 951               && local_got_refcounts == NULL)
 952             {
 953               if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
 954                 return FALSE;
 955               local_got_refcounts = elf_local_got_refcounts (abfd);
 956             }
 957
 958           /* Fall through.  */
 959         case R_390_GOTOFF16:
 960         case R_390_GOTOFF32:
 961         case R_390_GOTOFF64:
 962         case R_390_GOTPC:
 963         case R_390_GOTPCDBL:
 964           if (htab->elf.sgot == NULL)
 965             {
 966               if (htab->elf.dynobj == NULL)
 967                 htab->elf.dynobj = abfd;
 968               if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
 969                 return FALSE;
 970             }
 971         }
 972
 973       if (h != NULL)
 974         {
 975           if (htab->elf.dynobj == NULL)
 976             htab->elf.dynobj = abfd;
 977           if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
 978             return FALSE;
 979
 980           /* Make sure an IFUNC symbol defined in a non-shared object
 981              always gets a PLT slot.  */
 982           if (s390_is_ifunc_symbol_p (h) && h->def_regular)
 983             {
 984               /* The symbol is called by the dynamic loader in order
 985                  to resolve the relocation.  So it is in fact also
 986                  referenced.  */
 987               h->ref_regular = 1;
 988               h->needs_plt = 1;
 989             }
 990         }
 991
 992       switch (r_type)
 993         {
 994         case R_390_GOTPC:
 995         case R_390_GOTPCDBL:
 996           /* These relocs do not need a GOT slot.  They just load the
 997              GOT pointer itself or address something else relative to
 998              the GOT.  Since the GOT pointer has been set up above we
 999              are done.  */
1000           break;
1001         case R_390_GOTOFF16:
1002         case R_390_GOTOFF32:
1003         case R_390_GOTOFF64:
1004           if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1005             break;
1006           /* Fall through.  */
1007
1008         case R_390_PLT12DBL:
1009         case R_390_PLT16DBL:
1010         case R_390_PLT24DBL:
1011         case R_390_PLT32:
1012         case R_390_PLT32DBL:
1013         case R_390_PLT64:
1014         case R_390_PLTOFF16:
1015         case R_390_PLTOFF32:
1016         case R_390_PLTOFF64:
1017           /* This symbol requires a procedure linkage table entry.  We
1018              actually build the entry in adjust_dynamic_symbol,
1019              because this might be a case of linking PIC code which is
1020              never referenced by a dynamic object, in which case we
1021              don't need to generate a procedure linkage table entry
1022              after all.  */
1023
1024           /* If this is a local symbol, we resolve it directly without
1025              creating a procedure linkage table entry.  */
1026           if (h != NULL)
1027             {
1028               h->needs_plt = 1;
1029               h->plt.refcount += 1;
1030             }
1031           break;
1032
1033         case R_390_GOTPLT12:
1034         case R_390_GOTPLT16:
1035         case R_390_GOTPLT20:
1036         case R_390_GOTPLT32:
1037         case R_390_GOTPLT64:
1038         case R_390_GOTPLTENT:
1039           /* This symbol requires either a procedure linkage table entry
1040              or an entry in the local got. We actually build the entry
1041              in adjust_dynamic_symbol because whether this is really a
1042              global reference can change and with it the fact if we have
1043              to create a plt entry or a local got entry. To be able to
1044              make a once global symbol a local one we have to keep track
1045              of the number of gotplt references that exist for this
1046              symbol.  */
1047           if (h != NULL)
1048             {
1049               ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1050               h->needs_plt = 1;
1051               h->plt.refcount += 1;
1052             }
1053           else
1054             local_got_refcounts[r_symndx] += 1;
1055           break;
1056
1057         case R_390_TLS_LDM64:
1058           htab->tls_ldm_got.refcount += 1;
1059           break;
1060
1061         case R_390_TLS_IE64:
1062         case R_390_TLS_GOTIE12:
1063         case R_390_TLS_GOTIE20:
1064         case R_390_TLS_GOTIE64:
1065         case R_390_TLS_IEENT:
1066           if (bfd_link_pic (info))
1067             info->flags |= DF_STATIC_TLS;
1068           /* Fall through */
1069
1070         case R_390_GOT12:
1071         case R_390_GOT16:
1072         case R_390_GOT20:
1073         case R_390_GOT32:
1074         case R_390_GOT64:
1075         case R_390_GOTENT:
1076         case R_390_TLS_GD64:
1077           /* This symbol requires a global offset table entry.  */
1078           switch (r_type)
1079             {
1080             default:
1081             case R_390_GOT12:
1082             case R_390_GOT16:
1083             case R_390_GOT20:
1084             case R_390_GOT32:
1085             case R_390_GOTENT:
1086               tls_type = GOT_NORMAL;
1087               break;
1088             case R_390_TLS_GD64:
1089               tls_type = GOT_TLS_GD;
1090               break;
1091             case R_390_TLS_IE64:
1092             case R_390_TLS_GOTIE64:
1093               tls_type = GOT_TLS_IE;
1094               break;
1095             case R_390_TLS_GOTIE12:
1096             case R_390_TLS_GOTIE20:
1097             case R_390_TLS_IEENT:
1098               tls_type = GOT_TLS_IE_NLT;
1099               break;
1100             }
1101
1102           if (h != NULL)
1103             {
1104               h->got.refcount += 1;
1105               old_tls_type = elf_s390_hash_entry(h)->tls_type;
1106             }
1107           else
1108             {
1109               local_got_refcounts[r_symndx] += 1;
1110               old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1111             }
1112           /* If a TLS symbol is accessed using IE at least once,
1113              there is no point to use dynamic model for it.  */
1114           if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1115             {
1116               if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1117                 {
1118                   _bfd_error_handler
1119                     /* xgettext:c-format */
1120                     (_("%pB: `%s' accessed both as normal and thread local symbol"),
1121                      abfd, h->root.root.string);
1122                   return FALSE;
1123                 }
1124               if (old_tls_type > tls_type)
1125                 tls_type = old_tls_type;
1126             }
1127
1128           if (old_tls_type != tls_type)
1129             {
1130               if (h != NULL)
1131                 elf_s390_hash_entry (h)->tls_type = tls_type;
1132               else
1133                 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1134             }
1135
1136           if (r_type != R_390_TLS_IE64)
1137             break;
1138           /* Fall through */
1139
1140         case R_390_TLS_LE64:
1141           /* For static linking and executables this reloc will be
1142              calculated at linktime otherwise a TLS_TPOFF runtime
1143              reloc will be generated.  */
1144           if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1145             break;
1146
1147           if (!bfd_link_pic (info))
1148             break;
1149           info->flags |= DF_STATIC_TLS;
1150           /* Fall through */
1151
1152         case R_390_8:
1153         case R_390_16:
1154         case R_390_32:
1155         case R_390_64:
1156         case R_390_PC12DBL:
1157         case R_390_PC16:
1158         case R_390_PC16DBL:
1159         case R_390_PC24DBL:
1160         case R_390_PC32:
1161         case R_390_PC32DBL:
1162         case R_390_PC64:
1163           if (h != NULL && bfd_link_executable (info))
1164             {
1165               /* If this reloc is in a read-only section, we might
1166                  need a copy reloc.  We can't check reliably at this
1167                  stage whether the section is read-only, as input
1168                  sections have not yet been mapped to output sections.
1169                  Tentatively set the flag for now, and correct in
1170                  adjust_dynamic_symbol.  */
1171               h->non_got_ref = 1;
1172
1173               if (!bfd_link_pic (info))
1174                 {
1175                   /* We may need a .plt entry if the function this reloc
1176                      refers to is in a shared lib.  */
1177                   h->plt.refcount += 1;
1178                 }
1179             }
1180
1181           /* If we are creating a shared library, and this is a reloc
1182              against a global symbol, or a non PC relative reloc
1183              against a local symbol, then we need to copy the reloc
1184              into the shared library.  However, if we are linking with
1185              -Bsymbolic, we do not need to copy a reloc against a
1186              global symbol which is defined in an object we are
1187              including in the link (i.e., DEF_REGULAR is set).  At
1188              this point we have not seen all the input files, so it is
1189              possible that DEF_REGULAR is not set now but will be set
1190              later (it is never cleared).  In case of a weak definition,
1191              DEF_REGULAR may be cleared later by a strong definition in
1192              a shared library. We account for that possibility below by
1193              storing information in the relocs_copied field of the hash
1194              table entry.  A similar situation occurs when creating
1195              shared libraries and symbol visibility changes render the
1196              symbol local.
1197
1198              If on the other hand, we are creating an executable, we
1199              may need to keep relocations for symbols satisfied by a
1200              dynamic library if we manage to avoid copy relocs for the
1201              symbol.  */
1202           if ((bfd_link_pic (info)
1203                && (sec->flags & SEC_ALLOC) != 0
1204                && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1205                     && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1206                     && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1207                     && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1208                     && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1209                     && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1210                     && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1211                    || (h != NULL
1212                        && (! SYMBOLIC_BIND (info, h)
1213                            || h->root.type == bfd_link_hash_defweak
1214                            || !h->def_regular))))
1215               || (ELIMINATE_COPY_RELOCS
1216                   && !bfd_link_pic (info)
1217                   && (sec->flags & SEC_ALLOC) != 0
1218                   && h != NULL
1219                   && (h->root.type == bfd_link_hash_defweak
1220                       || !h->def_regular)))
1221             {
1222               struct elf_dyn_relocs *p;
1223               struct elf_dyn_relocs **head;
1224
1225               /* We must copy these reloc types into the output file.
1226                  Create a reloc section in dynobj and make room for
1227                  this reloc.  */
1228               if (sreloc == NULL)
1229                 {
1230                   if (htab->elf.dynobj == NULL)
1231                     htab->elf.dynobj = abfd;
1232
1233                   sreloc = _bfd_elf_make_dynamic_reloc_section
1234                     (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1235
1236                   if (sreloc == NULL)
1237                     return FALSE;
1238                 }
1239
1240               /* If this is a global symbol, we count the number of
1241                  relocations we need for this symbol.  */
1242               if (h != NULL)
1243                 {
1244                   head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1245                 }
1246               else
1247                 {
1248                   /* Track dynamic relocs needed for local syms too.
1249                      We really need local syms available to do this
1250                      easily.  Oh well.  */
1251                   asection *s;
1252                   void *vpp;
1253
1254                   isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1255                                                 abfd, r_symndx);
1256                   if (isym == NULL)
1257                     return FALSE;
1258
1259                   s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1260                   if (s == NULL)
1261                     s = sec;
1262
1263                   vpp = &elf_section_data (s)->local_dynrel;
1264                   head = (struct elf_dyn_relocs **) vpp;
1265                 }
1266
1267               p = *head;
1268               if (p == NULL || p->sec != sec)
1269                 {
1270                   bfd_size_type amt = sizeof *p;
1271                   p = ((struct elf_dyn_relocs *)
1272                        bfd_alloc (htab->elf.dynobj, amt));
1273                   if (p == NULL)
1274                     return FALSE;
1275                   p->next = *head;
1276                   *head = p;
1277                   p->sec = sec;
1278                   p->count = 0;
1279                   p->pc_count = 0;
1280                 }
1281
1282               p->count += 1;
1283               if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1284                   || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1285                   || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1286                   || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1287                   || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1288                   || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1289                   || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1290                 p->pc_count += 1;
1291             }
1292           break;
1293
1294           /* This relocation describes the C++ object vtable hierarchy.
1295              Reconstruct it for later use during GC.  */
1296         case R_390_GNU_VTINHERIT:
1297           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1298             return FALSE;
1299           break;
1300
1301           /* This relocation describes which C++ vtable entries are actually
1302              used.  Record for later use during GC.  */
1303         case R_390_GNU_VTENTRY:
1304           if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1305             return FALSE;
1306           break;
1307
1308         default:
1309           break;
1310         }
1311     }
1312
1313   return TRUE;
1314 }
1315
1316 /* Return the section that should be marked against GC for a given
1317    relocation.  */
1318
1319 static asection *
1320 elf_s390_gc_mark_hook (asection *sec,
1321                        struct bfd_link_info *info,
1322                        Elf_Internal_Rela *rel,
1323                        struct elf_link_hash_entry *h,
1324                        Elf_Internal_Sym *sym)
1325 {
1326   if (h != NULL)
1327     switch (ELF64_R_TYPE (rel->r_info))
1328       {
1329       case R_390_GNU_VTINHERIT:
1330       case R_390_GNU_VTENTRY:
1331         return NULL;
1332       }
1333
1334   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1335 }
1336
1337 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1338    entry but we found we will not create any.  Called when we find we will
1339    not have any PLT for this symbol, by for example
1340    elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1341    or elf_s390_size_dynamic_sections if no dynamic sections will be
1342    created (we're only linking static objects).  */
1343
1344 static void
1345 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1346 {
1347   if (h->elf.root.type == bfd_link_hash_warning)
1348     h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1349
1350   if (h->gotplt_refcount <= 0)
1351     return;
1352
1353   /* We simply add the number of gotplt references to the number
1354    * of got references for this symbol.  */
1355   h->elf.got.refcount += h->gotplt_refcount;
1356   h->gotplt_refcount = -1;
1357 }
1358
1359 /* Find dynamic relocs for H that apply to read-only sections.  */
1360
1361 static asection *
1362 readonly_dynrelocs (struct elf_link_hash_entry *h)
1363 {
1364   struct elf_dyn_relocs *p;
1365
1366   for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1367     {
1368       asection *s = p->sec->output_section;
1369
1370       if (s != NULL && (s->flags & SEC_READONLY) != 0)
1371         return p->sec;
1372     }
1373   return NULL;
1374 }
1375
1376 /* Adjust a symbol defined by a dynamic object and referenced by a
1377    regular object.  The current definition is in some section of the
1378    dynamic object, but we're not including those sections.  We have to
1379    change the definition to something the rest of the link can
1380    understand.  */
1381
1382 static bfd_boolean
1383 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1384                                 struct elf_link_hash_entry *h)
1385 {
1386   struct elf_s390_link_hash_table *htab;
1387   asection *s, *srel;
1388
1389   /* STT_GNU_IFUNC symbol must go through PLT. */
1390   if (s390_is_ifunc_symbol_p (h))
1391     {
1392       /* All local STT_GNU_IFUNC references must be treated as local
1393          calls via local PLT.  */
1394       if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1395         {
1396           bfd_size_type pc_count = 0, count = 0;
1397           struct elf_dyn_relocs **pp;
1398           struct elf_s390_link_hash_entry *eh;
1399           struct elf_dyn_relocs *p;
1400
1401           eh = (struct elf_s390_link_hash_entry *) h;
1402           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1403             {
1404               pc_count += p->pc_count;
1405               p->count -= p->pc_count;
1406               p->pc_count = 0;
1407               count += p->count;
1408               if (p->count == 0)
1409                 *pp = p->next;
1410               else
1411                 pp = &p->next;
1412             }
1413
1414           if (pc_count || count)
1415             {
1416               h->needs_plt = 1;
1417               h->non_got_ref = 1;
1418               if (h->plt.refcount <= 0)
1419                 h->plt.refcount = 1;
1420               else
1421                 h->plt.refcount += 1;
1422             }
1423         }
1424
1425       if (h->plt.refcount <= 0)
1426         {
1427           h->plt.offset = (bfd_vma) -1;
1428           h->needs_plt = 0;
1429         }
1430       return TRUE;
1431     }
1432
1433   /* If this is a function, put it in the procedure linkage table.  We
1434      will fill in the contents of the procedure linkage table later
1435      (although we could actually do it here).  */
1436   if (h->type == STT_FUNC
1437       || h->needs_plt)
1438     {
1439       if (h->plt.refcount <= 0
1440           || SYMBOL_CALLS_LOCAL (info, h)
1441           || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1442         {
1443           /* This case can occur if we saw a PLT32 reloc in an input
1444              file, but the symbol was never referred to by a dynamic
1445              object, or if all references were garbage collected.  In
1446              such a case, we don't actually need to build a procedure
1447              linkage table, and we can just do a PC32 reloc instead.  */
1448           h->plt.offset = (bfd_vma) -1;
1449           h->needs_plt = 0;
1450           elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1451         }
1452
1453       return TRUE;
1454     }
1455   else
1456     /* It's possible that we incorrectly decided a .plt reloc was
1457        needed for an R_390_PC32 reloc to a non-function sym in
1458        check_relocs.  We can't decide accurately between function and
1459        non-function syms in check-relocs;  Objects loaded later in
1460        the link may change h->type.  So fix it now.  */
1461     h->plt.offset = (bfd_vma) -1;
1462
1463   /* If this is a weak symbol, and there is a real definition, the
1464      processor independent code will have arranged for us to see the
1465      real definition first, and we can just use the same value.  */
1466   if (h->is_weakalias)
1467     {
1468       struct elf_link_hash_entry *def = weakdef (h);
1469       BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1470       h->root.u.def.section = def->root.u.def.section;
1471       h->root.u.def.value = def->root.u.def.value;
1472       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1473         h->non_got_ref = def->non_got_ref;
1474       return TRUE;
1475     }
1476
1477   /* This is a reference to a symbol defined by a dynamic object which
1478      is not a function.  */
1479
1480   /* If we are creating a shared library, we must presume that the
1481      only references to the symbol are via the global offset table.
1482      For such cases we need not do anything here; the relocations will
1483      be handled correctly by relocate_section.  */
1484   if (bfd_link_pic (info))
1485     return TRUE;
1486
1487   /* If there are no references to this symbol that do not use the
1488      GOT, we don't need to generate a copy reloc.  */
1489   if (!h->non_got_ref)
1490     return TRUE;
1491
1492   /* If -z nocopyreloc was given, we won't generate them either.  */
1493   if (info->nocopyreloc)
1494     {
1495       h->non_got_ref = 0;
1496       return TRUE;
1497     }
1498
1499   /* If we don't find any dynamic relocs in read-only sections, then
1500      we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1501   if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1502     {
1503       h->non_got_ref = 0;
1504       return TRUE;
1505     }
1506
1507   /* We must allocate the symbol in our .dynbss section, which will
1508      become part of the .bss section of the executable.  There will be
1509      an entry for this symbol in the .dynsym section.  The dynamic
1510      object will contain position independent code, so all references
1511      from the dynamic object to this symbol will go through the global
1512      offset table.  The dynamic linker will use the .dynsym entry to
1513      determine the address it must put in the global offset table, so
1514      both the dynamic object and the regular object will refer to the
1515      same memory location for the variable.  */
1516
1517   htab = elf_s390_hash_table (info);
1518   if (htab == NULL)
1519     return FALSE;
1520
1521   /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1522      copy the initial value out of the dynamic object and into the
1523      runtime process image.  */
1524   if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1525     {
1526       s = htab->elf.sdynrelro;
1527       srel = htab->elf.sreldynrelro;
1528     }
1529   else
1530     {
1531       s = htab->elf.sdynbss;
1532       srel = htab->elf.srelbss;
1533     }
1534   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1535     {
1536       srel->size += sizeof (Elf64_External_Rela);
1537       h->needs_copy = 1;
1538     }
1539
1540   return _bfd_elf_adjust_dynamic_copy (info, h, s);
1541 }
1542
1543 /* Allocate space in .plt, .got and associated reloc sections for
1544    dynamic relocs.  */
1545
1546 static bfd_boolean
1547 allocate_dynrelocs (struct elf_link_hash_entry *h,
1548                     void * inf)
1549 {
1550   struct bfd_link_info *info;
1551   struct elf_s390_link_hash_table *htab;
1552   struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1553   struct elf_dyn_relocs *p;
1554
1555   if (h->root.type == bfd_link_hash_indirect)
1556     return TRUE;
1557
1558   info = (struct bfd_link_info *) inf;
1559   htab = elf_s390_hash_table (info);
1560   if (htab == NULL)
1561     return FALSE;
1562
1563   /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1564      here if it is defined and referenced in a non-shared object.  */
1565   if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1566     return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1567   else if (htab->elf.dynamic_sections_created
1568            && h->plt.refcount > 0)
1569     {
1570       /* Make sure this symbol is output as a dynamic symbol.
1571          Undefined weak syms won't yet be marked as dynamic.  */
1572       if (h->dynindx == -1
1573           && !h->forced_local)
1574         {
1575           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1576             return FALSE;
1577         }
1578
1579       if (bfd_link_pic (info)
1580           || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1581         {
1582           asection *s = htab->elf.splt;
1583
1584           /* If this is the first .plt entry, make room for the special
1585              first entry.  */
1586           if (s->size == 0)
1587             s->size += PLT_FIRST_ENTRY_SIZE;
1588
1589           h->plt.offset = s->size;
1590
1591           /* If this symbol is not defined in a regular file, and we are
1592              not generating a shared library, then set the symbol to this
1593              location in the .plt.  This is required to make function
1594              pointers compare as equal between the normal executable and
1595              the shared library.  */
1596           if (! bfd_link_pic (info)
1597               && !h->def_regular)
1598             {
1599               h->root.u.def.section = s;
1600               h->root.u.def.value = h->plt.offset;
1601             }
1602
1603           /* Make room for this entry.  */
1604           s->size += PLT_ENTRY_SIZE;
1605
1606           /* We also need to make an entry in the .got.plt section.  */
1607           htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1608
1609           /* We also need to make an entry in the .rela.plt section.  */
1610           htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1611         }
1612       else
1613         {
1614           h->plt.offset = (bfd_vma) -1;
1615           h->needs_plt = 0;
1616           elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1617         }
1618     }
1619   else
1620     {
1621       h->plt.offset = (bfd_vma) -1;
1622       h->needs_plt = 0;
1623       elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1624     }
1625
1626   /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1627      the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1628      to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1629      we can save the dynamic TLS relocation.  */
1630   if (h->got.refcount > 0
1631       && !bfd_link_pic (info)
1632       && h->dynindx == -1
1633       && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1634     {
1635       if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1636         /* For the GOTIE access without a literal pool entry the offset has
1637            to be stored somewhere. The immediate value in the instruction
1638            is not bit enough so the value is stored in the got.  */
1639         {
1640           h->got.offset = htab->elf.sgot->size;
1641           htab->elf.sgot->size += GOT_ENTRY_SIZE;
1642         }
1643       else
1644         h->got.offset = (bfd_vma) -1;
1645     }
1646   else if (h->got.refcount > 0)
1647     {
1648       asection *s;
1649       bfd_boolean dyn;
1650       int tls_type = elf_s390_hash_entry(h)->tls_type;
1651
1652       /* Make sure this symbol is output as a dynamic symbol.
1653          Undefined weak syms won't yet be marked as dynamic.  */
1654       if (h->dynindx == -1
1655           && !h->forced_local)
1656         {
1657           if (! bfd_elf_link_record_dynamic_symbol (info, h))
1658             return FALSE;
1659         }
1660
1661       s = htab->elf.sgot;
1662       h->got.offset = s->size;
1663       s->size += GOT_ENTRY_SIZE;
1664       /* R_390_TLS_GD64 needs 2 consecutive GOT slots.  */
1665       if (tls_type == GOT_TLS_GD)
1666         s->size += GOT_ENTRY_SIZE;
1667       dyn = htab->elf.dynamic_sections_created;
1668       /* R_390_TLS_IE64 needs one dynamic relocation,
1669          R_390_TLS_GD64 needs one if local symbol and two if global.  */
1670       if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1671           || tls_type >= GOT_TLS_IE)
1672         htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1673       else if (tls_type == GOT_TLS_GD)
1674         htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1675       else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1676                && (bfd_link_pic (info)
1677                    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1678         htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1679     }
1680   else
1681     h->got.offset = (bfd_vma) -1;
1682
1683   if (eh->dyn_relocs == NULL)
1684     return TRUE;
1685
1686   /* In the shared -Bsymbolic case, discard space allocated for
1687      dynamic pc-relative relocs against symbols which turn out to be
1688      defined in regular objects.  For the normal shared case, discard
1689      space for pc-relative relocs that have become local due to symbol
1690      visibility changes.  */
1691
1692   if (bfd_link_pic (info))
1693     {
1694       if (SYMBOL_CALLS_LOCAL (info, h))
1695         {
1696           struct elf_dyn_relocs **pp;
1697
1698           for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1699             {
1700               p->count -= p->pc_count;
1701               p->pc_count = 0;
1702               if (p->count == 0)
1703                 *pp = p->next;
1704               else
1705                 pp = &p->next;
1706             }
1707         }
1708
1709       /* Also discard relocs on undefined weak syms with non-default
1710          visibility.  */
1711       if (eh->dyn_relocs != NULL
1712           && h->root.type == bfd_link_hash_undefweak)
1713         {
1714           if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1715               || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1716             eh->dyn_relocs = NULL;
1717
1718           /* Make sure undefined weak symbols are output as a dynamic
1719              symbol in PIEs.  */
1720           else if (h->dynindx == -1
1721                    && !h->forced_local)
1722             {
1723               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1724                 return FALSE;
1725             }
1726         }
1727     }
1728   else if (ELIMINATE_COPY_RELOCS)
1729     {
1730       /* For the non-shared case, discard space for relocs against
1731          symbols which turn out to need copy relocs or are not
1732          dynamic.  */
1733
1734       if (!h->non_got_ref
1735           && ((h->def_dynamic
1736                && !h->def_regular)
1737               || (htab->elf.dynamic_sections_created
1738                   && (h->root.type == bfd_link_hash_undefweak
1739                       || h->root.type == bfd_link_hash_undefined))))
1740         {
1741           /* Make sure this symbol is output as a dynamic symbol.
1742              Undefined weak syms won't yet be marked as dynamic.  */
1743           if (h->dynindx == -1
1744               && !h->forced_local)
1745             {
1746               if (! bfd_elf_link_record_dynamic_symbol (info, h))
1747                 return FALSE;
1748             }
1749
1750           /* If that succeeded, we know we'll be keeping all the
1751              relocs.  */
1752           if (h->dynindx != -1)
1753             goto keep;
1754         }
1755
1756       eh->dyn_relocs = NULL;
1757
1758     keep: ;
1759     }
1760
1761   /* Finally, allocate space.  */
1762   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1763     {
1764       asection *sreloc = elf_section_data (p->sec)->sreloc;
1765       sreloc->size += p->count * sizeof (Elf64_External_Rela);
1766     }
1767
1768   return TRUE;
1769 }
1770
1771 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1772    read-only sections.  */
1773
1774 static bfd_boolean
1775 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1776 {
1777   asection *sec;
1778
1779   if (h->root.type == bfd_link_hash_indirect)
1780     return TRUE;
1781
1782   sec = readonly_dynrelocs (h);
1783   if (sec != NULL)
1784     {
1785       struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1786
1787       info->flags |= DF_TEXTREL;
1788       info->callbacks->minfo
1789         (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1790          sec->owner, h->root.root.string, sec);
1791
1792       /* Not an error, just cut short the traversal.  */
1793       return FALSE;
1794     }
1795   return TRUE;
1796 }
1797
1798 /* Set the sizes of the dynamic sections.  */
1799
1800 static bfd_boolean
1801 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1802                                 struct bfd_link_info *info)
1803 {
1804   struct elf_s390_link_hash_table *htab;
1805   bfd *dynobj;
1806   asection *s;
1807   bfd_boolean relocs;
1808   bfd *ibfd;
1809
1810   htab = elf_s390_hash_table (info);
1811   if (htab == NULL)
1812     return FALSE;
1813
1814   dynobj = htab->elf.dynobj;
1815   if (dynobj == NULL)
1816     abort ();
1817
1818   if (htab->elf.dynamic_sections_created)
1819     {
1820       /* Set the contents of the .interp section to the interpreter.  */
1821       if (bfd_link_executable (info) && !info->nointerp)
1822         {
1823           s = bfd_get_linker_section (dynobj, ".interp");
1824           if (s == NULL)
1825             abort ();
1826           s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1827           s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1828         }
1829     }
1830
1831   if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1832     {
1833       /* _bfd_elf_create_got_section adds the got header size always
1834          to .got.plt but we need it in .got if this section comes
1835          first.  */
1836       htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1837       htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1838
1839       /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1840          instead of .got.plt.  */
1841       htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1842       htab->elf.hgot->root.u.def.value = 0;
1843     }
1844
1845   /* Set up .got offsets for local syms, and space for local dynamic
1846      relocs.  */
1847   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1848     {
1849       bfd_signed_vma *local_got;
1850       bfd_signed_vma *end_local_got;
1851       char *local_tls_type;
1852       bfd_size_type locsymcount;
1853       Elf_Internal_Shdr *symtab_hdr;
1854       asection *srela;
1855       struct plt_entry *local_plt;
1856       unsigned int i;
1857
1858       if (! is_s390_elf (ibfd))
1859         continue;
1860
1861       for (s = ibfd->sections; s != NULL; s = s->next)
1862         {
1863           struct elf_dyn_relocs *p;
1864
1865           for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1866             {
1867               if (!bfd_is_abs_section (p->sec)
1868                   && bfd_is_abs_section (p->sec->output_section))
1869                 {
1870                   /* Input section has been discarded, either because
1871                      it is a copy of a linkonce section or due to
1872                      linker script /DISCARD/, so we'll be discarding
1873                      the relocs too.  */
1874                 }
1875               else if (p->count != 0)
1876                 {
1877                   srela = elf_section_data (p->sec)->sreloc;
1878                   srela->size += p->count * sizeof (Elf64_External_Rela);
1879                   if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1880                     info->flags |= DF_TEXTREL;
1881                 }
1882             }
1883         }
1884
1885       local_got = elf_local_got_refcounts (ibfd);
1886       if (!local_got)
1887         continue;
1888
1889       symtab_hdr = &elf_symtab_hdr (ibfd);
1890       locsymcount = symtab_hdr->sh_info;
1891       end_local_got = local_got + locsymcount;
1892       local_tls_type = elf_s390_local_got_tls_type (ibfd);
1893       s = htab->elf.sgot;
1894       srela = htab->elf.srelgot;
1895       for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1896         {
1897           if (*local_got > 0)
1898             {
1899               *local_got = s->size;
1900               s->size += GOT_ENTRY_SIZE;
1901               if (*local_tls_type == GOT_TLS_GD)
1902                 s->size += GOT_ENTRY_SIZE;
1903               if (bfd_link_pic (info))
1904                 srela->size += sizeof (Elf64_External_Rela);
1905             }
1906           else
1907             *local_got = (bfd_vma) -1;
1908         }
1909
1910       local_plt = elf_s390_local_plt (ibfd);
1911       for (i = 0; i < symtab_hdr->sh_info; i++)
1912         {
1913           if (local_plt[i].plt.refcount > 0)
1914             {
1915               local_plt[i].plt.offset = htab->elf.iplt->size;
1916               htab->elf.iplt->size += PLT_ENTRY_SIZE;
1917               htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1918               htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1919             }
1920           else
1921             local_plt[i].plt.offset = (bfd_vma) -1;
1922         }
1923     }
1924
1925   if (htab->tls_ldm_got.refcount > 0)
1926     {
1927       /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1928          relocs.  */
1929       htab->tls_ldm_got.offset = htab->elf.sgot->size;
1930       htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1931       htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1932     }
1933   else
1934     htab->tls_ldm_got.offset = -1;
1935
1936   /* Allocate global sym .plt and .got entries, and space for global
1937      sym dynamic relocs.  */
1938   elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1939
1940   /* We now have determined the sizes of the various dynamic sections.
1941      Allocate memory for them.  */
1942   relocs = FALSE;
1943   for (s = dynobj->sections; s != NULL; s = s->next)
1944     {
1945       if ((s->flags & SEC_LINKER_CREATED) == 0)
1946         continue;
1947
1948       if (s == htab->elf.splt
1949           || s == htab->elf.sgot
1950           || s == htab->elf.sgotplt
1951           || s == htab->elf.sdynbss
1952           || s == htab->elf.sdynrelro
1953           || s == htab->elf.iplt
1954           || s == htab->elf.igotplt
1955           || s == htab->irelifunc)
1956         {
1957           /* Strip this section if we don't need it; see the
1958              comment below.  */
1959         }
1960       else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
1961         {
1962           if (s->size != 0 && s != htab->elf.srelplt)
1963             relocs = TRUE;
1964
1965           /* We use the reloc_count field as a counter if we need
1966              to copy relocs into the output file.  */
1967           s->reloc_count = 0;
1968         }
1969       else
1970         {
1971           /* It's not one of our sections, so don't allocate space.  */
1972           continue;
1973         }
1974
1975       if (s->size == 0)
1976         {
1977           /* If we don't need this section, strip it from the
1978              output file.  This is to handle .rela.bss and
1979              .rela.plt.  We must create it in
1980              create_dynamic_sections, because it must be created
1981              before the linker maps input sections to output
1982              sections.  The linker does that before
1983              adjust_dynamic_symbol is called, and it is that
1984              function which decides whether anything needs to go
1985              into these sections.  */
1986
1987           s->flags |= SEC_EXCLUDE;
1988           continue;
1989         }
1990
1991       if ((s->flags & SEC_HAS_CONTENTS) == 0)
1992         continue;
1993
1994       /* Allocate memory for the section contents.  We use bfd_zalloc
1995          here in case unused entries are not reclaimed before the
1996          section's contents are written out.  This should not happen,
1997          but this way if it does, we get a R_390_NONE reloc instead
1998          of garbage.  */
1999       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2000       if (s->contents == NULL)
2001         return FALSE;
2002     }
2003
2004   if (htab->elf.dynamic_sections_created)
2005     {
2006       /* Add some entries to the .dynamic section.  We fill in the
2007          values later, in elf_s390_finish_dynamic_sections, but we
2008          must add the entries now so that we get the correct size for
2009          the .dynamic section.  The DT_DEBUG entry is filled in by the
2010          dynamic linker and used by the debugger.  */
2011 #define add_dynamic_entry(TAG, VAL) \
2012   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2013
2014       if (bfd_link_executable (info))
2015         {
2016           if (!add_dynamic_entry (DT_DEBUG, 0))
2017             return FALSE;
2018         }
2019
2020       if (htab->elf.splt->size != 0)
2021         {
2022           if (!add_dynamic_entry (DT_PLTGOT, 0)
2023               || !add_dynamic_entry (DT_PLTRELSZ, 0)
2024               || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2025               || !add_dynamic_entry (DT_JMPREL, 0))
2026             return FALSE;
2027         }
2028
2029       if (relocs)
2030         {
2031           if (!add_dynamic_entry (DT_RELA, 0)
2032               || !add_dynamic_entry (DT_RELASZ, 0)
2033               || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2034             return FALSE;
2035
2036           /* If any dynamic relocs apply to a read-only section,
2037              then we need a DT_TEXTREL entry.  */
2038           if ((info->flags & DF_TEXTREL) == 0)
2039             elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2040
2041           if ((info->flags & DF_TEXTREL) != 0)
2042             {
2043               if (!add_dynamic_entry (DT_TEXTREL, 0))
2044                 return FALSE;
2045             }
2046         }
2047     }
2048 #undef add_dynamic_entry
2049
2050   return TRUE;
2051 }
2052
2053 /* Return the base VMA address which should be subtracted from real addresses
2054    when resolving @dtpoff relocation.
2055    This is PT_TLS segment p_vaddr.  */
2056
2057 static bfd_vma
2058 dtpoff_base (struct bfd_link_info *info)
2059 {
2060   /* If tls_sec is NULL, we should have signalled an error already.  */
2061   if (elf_hash_table (info)->tls_sec == NULL)
2062     return 0;
2063   return elf_hash_table (info)->tls_sec->vma;
2064 }
2065
2066 /* Return the relocation value for @tpoff relocation
2067    if STT_TLS virtual address is ADDRESS.  */
2068
2069 static bfd_vma
2070 tpoff (struct bfd_link_info *info, bfd_vma address)
2071 {
2072   struct elf_link_hash_table *htab = elf_hash_table (info);
2073
2074   /* If tls_sec is NULL, we should have signalled an error already.  */
2075   if (htab->tls_sec == NULL)
2076     return 0;
2077   return htab->tls_size + htab->tls_sec->vma - address;
2078 }
2079
2080 /* Complain if TLS instruction relocation is against an invalid
2081    instruction.  */
2082
2083 static void
2084 invalid_tls_insn (bfd *input_bfd,
2085                   asection *input_section,
2086                   Elf_Internal_Rela *rel)
2087 {
2088   reloc_howto_type *howto;
2089
2090   howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2091   _bfd_error_handler
2092     /* xgettext:c-format */
2093     (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2094      input_bfd,
2095      input_section,
2096      (uint64_t) rel->r_offset,
2097      howto->name);
2098   bfd_set_error (bfd_error_bad_value);
2099 }
2100
2101 /* Relocate a 390 ELF section.  */
2102
2103 static bfd_boolean
2104 elf_s390_relocate_section (bfd *output_bfd,
2105                            struct bfd_link_info *info,
2106                            bfd *input_bfd,
2107                            asection *input_section,
2108                            bfd_byte *contents,
2109                            Elf_Internal_Rela *relocs,
2110                            Elf_Internal_Sym *local_syms,
2111                            asection **local_sections)
2112 {
2113   struct elf_s390_link_hash_table *htab;
2114   Elf_Internal_Shdr *symtab_hdr;
2115   struct elf_link_hash_entry **sym_hashes;
2116   bfd_vma *local_got_offsets;
2117   Elf_Internal_Rela *rel;
2118   Elf_Internal_Rela *relend;
2119
2120   if (!is_s390_elf (input_bfd))
2121     {
2122       bfd_set_error (bfd_error_wrong_format);
2123       return FALSE;
2124     }
2125
2126   htab = elf_s390_hash_table (info);
2127   if (htab == NULL)
2128     return FALSE;
2129
2130   symtab_hdr = &elf_symtab_hdr (input_bfd);
2131   sym_hashes = elf_sym_hashes (input_bfd);
2132   local_got_offsets = elf_local_got_offsets (input_bfd);
2133
2134   rel = relocs;
2135   relend = relocs + input_section->reloc_count;
2136   for (; rel < relend; rel++)
2137     {
2138       unsigned int r_type;
2139       reloc_howto_type *howto;
2140       unsigned long r_symndx;
2141       struct elf_link_hash_entry *h;
2142       Elf_Internal_Sym *sym;
2143       asection *sec;
2144       bfd_vma off;
2145       bfd_vma relocation;
2146       bfd_boolean unresolved_reloc;
2147       bfd_reloc_status_type r;
2148       int tls_type;
2149       bfd_boolean resolved_to_zero;
2150
2151       r_type = ELF64_R_TYPE (rel->r_info);
2152       if (r_type == (int) R_390_GNU_VTINHERIT
2153           || r_type == (int) R_390_GNU_VTENTRY)
2154         continue;
2155       if (r_type >= (int) R_390_max)
2156         {
2157           bfd_set_error (bfd_error_bad_value);
2158           return FALSE;
2159         }
2160
2161       howto = elf_howto_table + r_type;
2162       r_symndx = ELF64_R_SYM (rel->r_info);
2163
2164       h = NULL;
2165       sym = NULL;
2166       sec = NULL;
2167       unresolved_reloc = FALSE;
2168       if (r_symndx < symtab_hdr->sh_info)
2169         {
2170           sym = local_syms + r_symndx;
2171           sec = local_sections[r_symndx];
2172
2173           if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2174             {
2175               struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2176               if (local_plt == NULL)
2177                 return FALSE;
2178
2179               /* Address of the PLT slot.  */
2180               relocation = (htab->elf.iplt->output_section->vma
2181                             + htab->elf.iplt->output_offset
2182                             + local_plt[r_symndx].plt.offset);
2183
2184               switch (r_type)
2185                 {
2186                 case R_390_PLTOFF16:
2187                 case R_390_PLTOFF32:
2188                 case R_390_PLTOFF64:
2189                   relocation -= s390_got_pointer (info);
2190                   break;
2191                 case R_390_GOTPLT12:
2192                 case R_390_GOTPLT16:
2193                 case R_390_GOTPLT20:
2194                 case R_390_GOTPLT32:
2195                 case R_390_GOTPLT64:
2196                 case R_390_GOTPLTENT:
2197                 case R_390_GOT12:
2198                 case R_390_GOT16:
2199                 case R_390_GOT20:
2200                 case R_390_GOT32:
2201                 case R_390_GOT64:
2202                 case R_390_GOTENT:
2203                   {
2204                     /* Write the PLT slot address into the GOT slot.  */
2205                     bfd_put_64 (output_bfd, relocation,
2206                                 htab->elf.sgot->contents +
2207                                 local_got_offsets[r_symndx]);
2208                     relocation = (local_got_offsets[r_symndx] +
2209                                   s390_got_offset (info));
2210
2211                     if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2212                       relocation += s390_got_pointer (info);
2213                     break;
2214                   }
2215                 default:
2216                   break;
2217                 }
2218               /* The output section is needed later in
2219                  finish_dynamic_section when creating the dynamic
2220                  relocation.  */
2221               local_plt[r_symndx].sec = sec;
2222               goto do_relocation;
2223             }
2224           else
2225             relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2226         }
2227       else
2228         {
2229           bfd_boolean warned ATTRIBUTE_UNUSED;
2230           bfd_boolean ignored ATTRIBUTE_UNUSED;
2231
2232           RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2233                                    r_symndx, symtab_hdr, sym_hashes,
2234                                    h, sec, relocation,
2235                                    unresolved_reloc, warned, ignored);
2236         }
2237
2238       if (sec != NULL && discarded_section (sec))
2239         RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2240                                          rel, 1, relend, howto, 0, contents);
2241
2242       if (bfd_link_relocatable (info))
2243         continue;
2244
2245       resolved_to_zero = (h != NULL
2246                           && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2247
2248       switch (r_type)
2249         {
2250         case R_390_GOTPLT12:
2251         case R_390_GOTPLT16:
2252         case R_390_GOTPLT20:
2253         case R_390_GOTPLT32:
2254         case R_390_GOTPLT64:
2255         case R_390_GOTPLTENT:
2256           /* There are three cases for a GOTPLT relocation. 1) The
2257              relocation is against the jump slot entry of a plt that
2258              will get emitted to the output file. 2) The relocation
2259              is against the jump slot of a plt entry that has been
2260              removed. elf_s390_adjust_gotplt has created a GOT entry
2261              as replacement. 3) The relocation is against a local symbol.
2262              Cases 2) and 3) are the same as the GOT relocation code
2263              so we just have to test for case 1 and fall through for
2264              the other two.  */
2265           if (h != NULL && h->plt.offset != (bfd_vma) -1)
2266             {
2267               bfd_vma plt_index;
2268
2269               if (s390_is_ifunc_symbol_p (h))
2270                 {
2271                   /* Entry indices of .iplt and .igot.plt match
2272                      1:1. No magic PLT first entry here.  */
2273                   plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2274                   relocation = (plt_index * GOT_ENTRY_SIZE
2275                                 + s390_gotplt_offset (info)
2276                                 + htab->elf.igotplt->output_offset);
2277                 }
2278               else
2279                 {
2280                   plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2281                                / PLT_ENTRY_SIZE);
2282
2283                   relocation = (plt_index * GOT_ENTRY_SIZE
2284                                 + s390_gotplt_offset (info));
2285                 }
2286               if (r_type == R_390_GOTPLTENT)
2287                 relocation += s390_got_pointer (info);
2288               unresolved_reloc = FALSE;
2289               break;
2290             }
2291           /* Fall through.  */
2292
2293         case R_390_GOT12:
2294         case R_390_GOT16:
2295         case R_390_GOT20:
2296         case R_390_GOT32:
2297         case R_390_GOT64:
2298         case R_390_GOTENT:
2299           /* Relocation is to the entry for this symbol in the global
2300              offset table.  */
2301           if (htab->elf.sgot == NULL)
2302             abort ();
2303
2304           if (h != NULL)
2305             {
2306               bfd_boolean dyn;
2307
2308               off = h->got.offset;
2309               dyn = htab->elf.dynamic_sections_created;
2310
2311               if (s390_is_ifunc_symbol_p (h))
2312                 {
2313                   BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2314                   if (off == (bfd_vma)-1)
2315                     {
2316                       /* No explicit GOT usage so redirect to the
2317                          got.iplt slot.  */
2318                       relocation = (s390_gotplt_offset (info)
2319                                     + htab->elf.igotplt->output_offset
2320                                     + (h->plt.offset / PLT_ENTRY_SIZE
2321                                        * GOT_ENTRY_SIZE));
2322
2323                       /* For @GOTENT the relocation is against the offset between
2324                          the instruction and the symbols entry in the GOT and not
2325                          between the start of the GOT and the symbols entry. We
2326                          add the vma of the GOT to get the correct value.  */
2327                       if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2328                         relocation += s390_got_pointer (info);
2329
2330                       break;
2331                     }
2332                   else
2333                     {
2334                       /* Explicit GOT slots must contain the address
2335                          of the PLT slot. This will be handled in
2336                          finish_dynamic_symbol.  */
2337                     }
2338                 }
2339               else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2340                                                           bfd_link_pic (info),
2341                                                           h)
2342                        || (bfd_link_pic (info)
2343                            && SYMBOL_REFERENCES_LOCAL (info, h))
2344                        || resolved_to_zero)
2345                 {
2346                   Elf_Internal_Sym *isym;
2347                   asection *sym_sec;
2348
2349                   /* This is actually a static link, or it is a
2350                      -Bsymbolic link and the symbol is defined
2351                      locally, or the symbol was forced to be local
2352                      because of a version file.  We must initialize
2353                      this entry in the global offset table.  Since the
2354                      offset must always be a multiple of 2, we use the
2355                      least significant bit to record whether we have
2356                      initialized it already.
2357
2358                      When doing a dynamic link, we create a .rel.got
2359                      relocation entry to initialize the value.  This
2360                      is done in the finish_dynamic_symbol routine.  */
2361                   if ((off & 1) != 0)
2362                     off &= ~1;
2363                   else
2364                     {
2365                       bfd_put_64 (output_bfd, relocation,
2366                                   htab->elf.sgot->contents + off);
2367                       h->got.offset |= 1;
2368                     }
2369
2370                   /* When turning a GOT slot dereference into a direct
2371                      reference using larl we have to make sure that
2372                      the symbol is 1. properly aligned and 2. it is no
2373                      ABS symbol or will become one.  */
2374                   if ((h->def_regular
2375                        && bfd_link_pic (info)
2376                        && SYMBOL_REFERENCES_LOCAL (info, h))
2377                       /* lgrl rx,sym@GOTENT -> larl rx, sym */
2378                       && ((r_type == R_390_GOTENT
2379                            && (bfd_get_16 (input_bfd,
2380                                            contents + rel->r_offset - 2)
2381                                & 0xff0f) == 0xc408)
2382                           /* lg rx, sym@GOT(r12) -> larl rx, sym */
2383                           || (r_type == R_390_GOT20
2384                               && (bfd_get_32 (input_bfd,
2385                                               contents + rel->r_offset - 2)
2386                                   & 0xff00f000) == 0xe300c000
2387                               && bfd_get_8 (input_bfd,
2388                                             contents + rel->r_offset + 3) == 0x04))
2389                       && (isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2390                                                         input_bfd, r_symndx))
2391                       && isym->st_shndx != SHN_ABS
2392                       && h != htab->elf.hdynamic
2393                       && h != htab->elf.hgot
2394                       && h != htab->elf.hplt
2395                       && !(isym->st_value & 1)
2396                       && (sym_sec = bfd_section_from_elf_index (input_bfd,
2397                                                                 isym->st_shndx))
2398                       && sym_sec->alignment_power)
2399                     {
2400                       unsigned short new_insn =
2401                         (0xc000 | (bfd_get_8 (input_bfd,
2402                                               contents + rel->r_offset - 1) & 0xf0));
2403                       bfd_put_16 (output_bfd, new_insn,
2404                                   contents + rel->r_offset - 2);
2405                       r_type = R_390_PC32DBL;
2406                       rel->r_addend = 2;
2407                       howto = elf_howto_table + r_type;
2408                       relocation = h->root.u.def.value
2409                         + h->root.u.def.section->output_section->vma
2410                         + h->root.u.def.section->output_offset;
2411                       goto do_relocation;
2412                     }
2413                 }
2414               else
2415                 unresolved_reloc = FALSE;
2416             }
2417           else
2418             {
2419               if (local_got_offsets == NULL)
2420                 abort ();
2421
2422               off = local_got_offsets[r_symndx];
2423
2424               /* The offset must always be a multiple of 8.  We use
2425                  the least significant bit to record whether we have
2426                  already generated the necessary reloc.  */
2427               if ((off & 1) != 0)
2428                 off &= ~1;
2429               else
2430                 {
2431                   bfd_put_64 (output_bfd, relocation,
2432                               htab->elf.sgot->contents + off);
2433
2434                   if (bfd_link_pic (info))
2435                     {
2436                       asection *s;
2437                       Elf_Internal_Rela outrel;
2438                       bfd_byte *loc;
2439
2440                       s = htab->elf.srelgot;
2441                       if (s == NULL)
2442                         abort ();
2443
2444                       outrel.r_offset = (htab->elf.sgot->output_section->vma
2445                                          + htab->elf.sgot->output_offset
2446                                          + off);
2447                       outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2448                       outrel.r_addend = relocation;
2449                       loc = s->contents;
2450                       loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2451                       bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2452                     }
2453
2454                   local_got_offsets[r_symndx] |= 1;
2455                 }
2456             }
2457
2458           if (off >= (bfd_vma) -2)
2459             abort ();
2460
2461           relocation = s390_got_offset (info) + off;
2462
2463           /* For @GOTENT the relocation is against the offset between
2464              the instruction and the symbols entry in the GOT and not
2465              between the start of the GOT and the symbols entry. We
2466              add the vma of the GOT to get the correct value.  */
2467           if (   r_type == R_390_GOTENT
2468               || r_type == R_390_GOTPLTENT)
2469             relocation += s390_got_pointer (info);
2470
2471           break;
2472
2473         case R_390_GOTOFF16:
2474         case R_390_GOTOFF32:
2475         case R_390_GOTOFF64:
2476           /* Relocation is relative to the start of the global offset
2477              table.  */
2478
2479           if (h != NULL
2480               && s390_is_ifunc_symbol_p (h)
2481               && h->def_regular
2482               && !bfd_link_executable (info))
2483             {
2484               relocation = (htab->elf.iplt->output_section->vma
2485                             + htab->elf.iplt->output_offset
2486                             + h->plt.offset
2487                             - s390_got_pointer (info));
2488               goto do_relocation;
2489             }
2490
2491           relocation -= s390_got_pointer (info);
2492           break;
2493
2494         case R_390_GOTPC:
2495         case R_390_GOTPCDBL:
2496           /* Use global offset table as symbol value.  */
2497           relocation = s390_got_pointer (info);
2498           unresolved_reloc = FALSE;
2499           break;
2500
2501         case R_390_PLT12DBL:
2502         case R_390_PLT16DBL:
2503         case R_390_PLT24DBL:
2504         case R_390_PLT32:
2505         case R_390_PLT32DBL:
2506         case R_390_PLT64:
2507           /* Relocation is to the entry for this symbol in the
2508              procedure linkage table.  */
2509
2510           /* Resolve a PLT32 reloc against a local symbol directly,
2511              without using the procedure linkage table.  */
2512           if (h == NULL)
2513             break;
2514
2515           if (h->plt.offset == (bfd_vma) -1
2516               || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2517             {
2518               /* We didn't make a PLT entry for this symbol.  This
2519                  happens when statically linking PIC code, or when
2520                  using -Bsymbolic.  */
2521               break;
2522             }
2523           if (s390_is_ifunc_symbol_p (h))
2524             relocation = (htab->elf.iplt->output_section->vma
2525                           + htab->elf.iplt->output_offset
2526                           + h->plt.offset);
2527           else
2528             relocation = (htab->elf.splt->output_section->vma
2529                           + htab->elf.splt->output_offset
2530                           + h->plt.offset);
2531           unresolved_reloc = FALSE;
2532           break;
2533
2534         case R_390_PLTOFF16:
2535         case R_390_PLTOFF32:
2536         case R_390_PLTOFF64:
2537           /* Relocation is to the entry for this symbol in the
2538              procedure linkage table relative to the start of the GOT.  */
2539
2540           /* For local symbols or if we didn't make a PLT entry for
2541              this symbol resolve the symbol directly.  */
2542           if (h == NULL
2543               || h->plt.offset == (bfd_vma) -1
2544               || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2545             {
2546               relocation -= s390_got_pointer (info);
2547               break;
2548             }
2549
2550           if (s390_is_ifunc_symbol_p (h))
2551             relocation = (htab->elf.iplt->output_section->vma
2552                           + htab->elf.iplt->output_offset
2553                           + h->plt.offset
2554                           - s390_got_pointer (info));
2555           else
2556             relocation = (htab->elf.splt->output_section->vma
2557                           + htab->elf.splt->output_offset
2558                           + h->plt.offset
2559                           - s390_got_pointer (info));
2560           unresolved_reloc = FALSE;
2561           break;
2562
2563         case R_390_PC16:
2564         case R_390_PC12DBL:
2565         case R_390_PC16DBL:
2566         case R_390_PC24DBL:
2567         case R_390_PC32:
2568         case R_390_PC32DBL:
2569         case R_390_PC64:
2570           if (h != NULL
2571               && bfd_link_pie (info)
2572               && !h->def_regular)
2573             {
2574               _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2575                                     "in shared library and accessed "
2576                                     "from executable "
2577                                     "(rebuild file with -fPIC ?)"),
2578                                   input_bfd, h->root.root.string);
2579               bfd_set_error (bfd_error_bad_value);
2580               return FALSE;
2581             }
2582           /* The target of these relocs are instruction operands
2583              residing in read-only sections.  We cannot emit a runtime
2584              reloc for it.  */
2585           if (h != NULL
2586               && s390_is_ifunc_symbol_p (h)
2587               && h->def_regular
2588               && bfd_link_pic (info))
2589             {
2590               relocation = (htab->elf.iplt->output_section->vma
2591                             + htab->elf.iplt->output_offset
2592                             + h->plt.offset);
2593               goto do_relocation;
2594             }
2595           /* Fall through.  */
2596
2597         case R_390_8:
2598         case R_390_16:
2599         case R_390_32:
2600         case R_390_64:
2601
2602           if ((input_section->flags & SEC_ALLOC) == 0)
2603             break;
2604
2605           if (h != NULL
2606               && s390_is_ifunc_symbol_p (h)
2607               && h->def_regular)
2608             {
2609               if (!bfd_link_pic (info))
2610                 {
2611                   /* For a non-shared object the symbol will not
2612                      change.  Hence we can write the address of the
2613                      target IPLT slot now.  */
2614                   relocation = (htab->elf.iplt->output_section->vma
2615                                 + htab->elf.iplt->output_offset
2616                                 + h ->plt.offset);
2617                   goto do_relocation;
2618                 }
2619               else
2620                 {
2621                   /* For shared objects a runtime relocation is needed.  */
2622
2623                   Elf_Internal_Rela outrel;
2624                   asection *sreloc;
2625
2626                   /* Need a dynamic relocation to get the real function
2627                      address.  */
2628                   outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2629                                                              info,
2630                                                              input_section,
2631                                                              rel->r_offset);
2632                   if (outrel.r_offset == (bfd_vma) -1
2633                       || outrel.r_offset == (bfd_vma) -2)
2634                     abort ();
2635
2636                   outrel.r_offset += (input_section->output_section->vma
2637                                       + input_section->output_offset);
2638
2639                   if (h->dynindx == -1
2640                       || h->forced_local
2641                       || bfd_link_executable (info))
2642                     {
2643                       /* This symbol is resolved locally.  */
2644                       outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2645                       outrel.r_addend = (h->root.u.def.value
2646                                          + h->root.u.def.section->output_section->vma
2647                                          + h->root.u.def.section->output_offset);
2648                     }
2649                   else
2650                     {
2651                       outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2652                       outrel.r_addend = 0;
2653                     }
2654
2655                   sreloc = htab->elf.irelifunc;
2656                   elf_append_rela (output_bfd, sreloc, &outrel);
2657
2658                   /* If this reloc is against an external symbol, we
2659                      do not want to fiddle with the addend.  Otherwise,
2660                      we need to include the symbol value so that it
2661                      becomes an addend for the dynamic reloc.  For an
2662                      internal symbol, we have updated addend.  */
2663                   continue;
2664                 }
2665             }
2666
2667           if ((bfd_link_pic (info)
2668                && (h == NULL
2669                    || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2670                        && !resolved_to_zero)
2671                    || h->root.type != bfd_link_hash_undefweak)
2672                && ((r_type != R_390_PC16
2673                     && r_type != R_390_PC12DBL
2674                     && r_type != R_390_PC16DBL
2675                     && r_type != R_390_PC24DBL
2676                     && r_type != R_390_PC32
2677                     && r_type != R_390_PC32DBL
2678                     && r_type != R_390_PC64)
2679                    || !SYMBOL_CALLS_LOCAL (info, h)))
2680               || (ELIMINATE_COPY_RELOCS
2681                   && !bfd_link_pic (info)
2682                   && h != NULL
2683                   && h->dynindx != -1
2684                   && !h->non_got_ref
2685                   && ((h->def_dynamic
2686                        && !h->def_regular)
2687                       || h->root.type == bfd_link_hash_undefweak
2688                       || h->root.type == bfd_link_hash_undefined)))
2689             {
2690               Elf_Internal_Rela outrel;
2691               bfd_boolean skip, relocate;
2692               asection *sreloc;
2693               bfd_byte *loc;
2694
2695               /* When generating a shared object, these relocations
2696                  are copied into the output file to be resolved at run
2697                  time.  */
2698               skip = FALSE;
2699               relocate = FALSE;
2700
2701               outrel.r_offset =
2702                 _bfd_elf_section_offset (output_bfd, info, input_section,
2703                                          rel->r_offset);
2704               if (outrel.r_offset == (bfd_vma) -1)
2705                 skip = TRUE;
2706               else if (outrel.r_offset == (bfd_vma) -2)
2707                 skip = TRUE, relocate = TRUE;
2708
2709               outrel.r_offset += (input_section->output_section->vma
2710                                   + input_section->output_offset);
2711
2712               if (skip)
2713                 memset (&outrel, 0, sizeof outrel);
2714               else if (h != NULL
2715                        && h->dynindx != -1
2716                        && (r_type == R_390_PC16
2717                            || r_type == R_390_PC12DBL
2718                            || r_type == R_390_PC16DBL
2719                            || r_type == R_390_PC24DBL
2720                            || r_type == R_390_PC32
2721                            || r_type == R_390_PC32DBL
2722                            || r_type == R_390_PC64
2723                            || !bfd_link_pic (info)
2724                            || !SYMBOLIC_BIND (info, h)
2725                            || !h->def_regular))
2726                 {
2727                   outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2728                   outrel.r_addend = rel->r_addend;
2729                 }
2730               else
2731                 {
2732                   /* This symbol is local, or marked to become local.  */
2733                   outrel.r_addend = relocation + rel->r_addend;
2734                   if (r_type == R_390_64)
2735                     {
2736                       relocate = TRUE;
2737                       outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2738                     }
2739                   else
2740                     {
2741                       long sindx;
2742
2743                       if (bfd_is_abs_section (sec))
2744                         sindx = 0;
2745                       else if (sec == NULL || sec->owner == NULL)
2746                         {
2747                           bfd_set_error(bfd_error_bad_value);
2748                           return FALSE;
2749                         }
2750                       else
2751                         {
2752                           asection *osec;
2753
2754                           osec = sec->output_section;
2755                           sindx = elf_section_data (osec)->dynindx;
2756
2757                           if (sindx == 0)
2758                             {
2759                               osec = htab->elf.text_index_section;
2760                               sindx = elf_section_data (osec)->dynindx;
2761                             }
2762                           BFD_ASSERT (sindx != 0);
2763
2764                           /* We are turning this relocation into one
2765                              against a section symbol, so subtract out
2766                              the output section's address but not the
2767                              offset of the input section in the output
2768                              section.  */
2769                           outrel.r_addend -= osec->vma;
2770                         }
2771                       outrel.r_info = ELF64_R_INFO (sindx, r_type);
2772                     }
2773                 }
2774
2775               sreloc = elf_section_data (input_section)->sreloc;
2776               if (sreloc == NULL)
2777                 abort ();
2778
2779               loc = sreloc->contents;
2780               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2781               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2782
2783               /* If this reloc is against an external symbol, we do
2784                  not want to fiddle with the addend.  Otherwise, we
2785                  need to include the symbol value so that it becomes
2786                  an addend for the dynamic reloc.  */
2787               if (! relocate)
2788                 continue;
2789             }
2790
2791           break;
2792
2793           /* Relocations for tls literal pool entries.  */
2794         case R_390_TLS_IE64:
2795           if (bfd_link_pic (info))
2796             {
2797               Elf_Internal_Rela outrel;
2798               asection *sreloc;
2799               bfd_byte *loc;
2800
2801               outrel.r_offset = rel->r_offset
2802                                 + input_section->output_section->vma
2803                                 + input_section->output_offset;
2804               outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2805               sreloc = elf_section_data (input_section)->sreloc;
2806               if (sreloc == NULL)
2807                 abort ();
2808               loc = sreloc->contents;
2809               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2810               bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2811             }
2812           /* Fall through.  */
2813
2814         case R_390_TLS_GD64:
2815         case R_390_TLS_GOTIE64:
2816           r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2817           tls_type = GOT_UNKNOWN;
2818           if (h == NULL && local_got_offsets)
2819             tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2820           else if (h != NULL)
2821             {
2822               tls_type = elf_s390_hash_entry(h)->tls_type;
2823               if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2824                 r_type = R_390_TLS_LE64;
2825             }
2826           if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2827             r_type = R_390_TLS_IE64;
2828
2829           if (r_type == R_390_TLS_LE64)
2830             {
2831               /* This relocation gets optimized away by the local exec
2832                  access optimization.  */
2833               BFD_ASSERT (! unresolved_reloc);
2834               bfd_put_64 (output_bfd, -tpoff (info, relocation),
2835                           contents + rel->r_offset);
2836               continue;
2837             }
2838
2839           if (htab->elf.sgot == NULL)
2840             abort ();
2841
2842           if (h != NULL)
2843             off = h->got.offset;
2844           else
2845             {
2846               if (local_got_offsets == NULL)
2847                 abort ();
2848
2849               off = local_got_offsets[r_symndx];
2850             }
2851
2852         emit_tls_relocs:
2853
2854           if ((off & 1) != 0)
2855             off &= ~1;
2856           else
2857             {
2858               Elf_Internal_Rela outrel;
2859               bfd_byte *loc;
2860               int dr_type, indx;
2861
2862               if (htab->elf.srelgot == NULL)
2863                 abort ();
2864
2865               outrel.r_offset = (htab->elf.sgot->output_section->vma
2866                                  + htab->elf.sgot->output_offset + off);
2867
2868               indx = h && h->dynindx != -1 ? h->dynindx : 0;
2869               if (r_type == R_390_TLS_GD64)
2870                 dr_type = R_390_TLS_DTPMOD;
2871               else
2872                 dr_type = R_390_TLS_TPOFF;
2873               if (dr_type == R_390_TLS_TPOFF && indx == 0)
2874                 outrel.r_addend = relocation - dtpoff_base (info);
2875               else
2876                 outrel.r_addend = 0;
2877               outrel.r_info = ELF64_R_INFO (indx, dr_type);
2878               loc = htab->elf.srelgot->contents;
2879               loc += htab->elf.srelgot->reloc_count++
2880                 * sizeof (Elf64_External_Rela);
2881               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2882
2883               if (r_type == R_390_TLS_GD64)
2884                 {
2885                   if (indx == 0)
2886                     {
2887                       BFD_ASSERT (! unresolved_reloc);
2888                       bfd_put_64 (output_bfd,
2889                                   relocation - dtpoff_base (info),
2890                                   htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2891                     }
2892                   else
2893                     {
2894                       outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2895                       outrel.r_offset += GOT_ENTRY_SIZE;
2896                       outrel.r_addend = 0;
2897                       htab->elf.srelgot->reloc_count++;
2898                       loc += sizeof (Elf64_External_Rela);
2899                       bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2900                     }
2901                 }
2902
2903               if (h != NULL)
2904                 h->got.offset |= 1;
2905               else
2906                 local_got_offsets[r_symndx] |= 1;
2907             }
2908
2909           if (off >= (bfd_vma) -2)
2910             abort ();
2911           if (r_type == ELF64_R_TYPE (rel->r_info))
2912             {
2913               relocation = htab->elf.sgot->output_offset + off;
2914               if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2915                 relocation += htab->elf.sgot->output_section->vma;
2916               unresolved_reloc = FALSE;
2917             }
2918           else
2919             {
2920               bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2921                           contents + rel->r_offset);
2922               continue;
2923             }
2924           break;
2925
2926         case R_390_TLS_GOTIE12:
2927         case R_390_TLS_GOTIE20:
2928         case R_390_TLS_IEENT:
2929           if (h == NULL)
2930             {
2931               if (local_got_offsets == NULL)
2932                 abort();
2933               off = local_got_offsets[r_symndx];
2934               if (bfd_link_pic (info))
2935                 goto emit_tls_relocs;
2936             }
2937           else
2938             {
2939               off = h->got.offset;
2940               tls_type = elf_s390_hash_entry(h)->tls_type;
2941               if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2942                 goto emit_tls_relocs;
2943             }
2944
2945           if (htab->elf.sgot == NULL)
2946             abort ();
2947
2948           BFD_ASSERT (! unresolved_reloc);
2949           bfd_put_64 (output_bfd, -tpoff (info, relocation),
2950                       htab->elf.sgot->contents + off);
2951           relocation = htab->elf.sgot->output_offset + off;
2952           if (r_type == R_390_TLS_IEENT)
2953             relocation += htab->elf.sgot->output_section->vma;
2954           unresolved_reloc = FALSE;
2955           break;
2956
2957         case R_390_TLS_LDM64:
2958           if (! bfd_link_pic (info))
2959             /* The literal pool entry this relocation refers to gets ignored
2960                by the optimized code of the local exec model. Do nothing
2961                and the value will turn out zero.  */
2962             continue;
2963
2964           if (htab->elf.sgot == NULL)
2965             abort ();
2966
2967           off = htab->tls_ldm_got.offset;
2968           if (off & 1)
2969             off &= ~1;
2970           else
2971             {
2972               Elf_Internal_Rela outrel;
2973               bfd_byte *loc;
2974
2975               if (htab->elf.srelgot == NULL)
2976                 abort ();
2977
2978               outrel.r_offset = (htab->elf.sgot->output_section->vma
2979                                  + htab->elf.sgot->output_offset + off);
2980
2981               bfd_put_64 (output_bfd, 0,
2982                           htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2983               outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2984               outrel.r_addend = 0;
2985               loc = htab->elf.srelgot->contents;
2986               loc += htab->elf.srelgot->reloc_count++
2987                 * sizeof (Elf64_External_Rela);
2988               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2989               htab->tls_ldm_got.offset |= 1;
2990             }
2991           relocation = htab->elf.sgot->output_offset + off;
2992           unresolved_reloc = FALSE;
2993           break;
2994
2995         case R_390_TLS_LE64:
2996           if (bfd_link_dll (info))
2997             {
2998               /* Linking a shared library with non-fpic code requires
2999                  a R_390_TLS_TPOFF relocation.  */
3000               Elf_Internal_Rela outrel;
3001               asection *sreloc;
3002               bfd_byte *loc;
3003               int indx;
3004
3005               outrel.r_offset = rel->r_offset
3006                                 + input_section->output_section->vma
3007                                 + input_section->output_offset;
3008               if (h != NULL && h->dynindx != -1)
3009                 indx = h->dynindx;
3010               else
3011                 indx = 0;
3012               outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3013               if (indx == 0)
3014                 outrel.r_addend = relocation - dtpoff_base (info);
3015               else
3016                 outrel.r_addend = 0;
3017               sreloc = elf_section_data (input_section)->sreloc;
3018               if (sreloc == NULL)
3019                 abort ();
3020               loc = sreloc->contents;
3021               loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3022               bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3023             }
3024           else
3025             {
3026               BFD_ASSERT (! unresolved_reloc);
3027               bfd_put_64 (output_bfd, -tpoff (info, relocation),
3028                           contents + rel->r_offset);
3029             }
3030           continue;
3031
3032         case R_390_TLS_LDO64:
3033           if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3034             relocation -= dtpoff_base (info);
3035           else
3036             /* When converting LDO to LE, we must negate.  */
3037             relocation = -tpoff (info, relocation);
3038           break;
3039
3040           /* Relocations for tls instructions.  */
3041         case R_390_TLS_LOAD:
3042         case R_390_TLS_GDCALL:
3043         case R_390_TLS_LDCALL:
3044           tls_type = GOT_UNKNOWN;
3045           if (h == NULL && local_got_offsets)
3046             tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3047           else if (h != NULL)
3048             tls_type = elf_s390_hash_entry(h)->tls_type;
3049
3050           if (tls_type == GOT_TLS_GD)
3051             continue;
3052
3053           if (r_type == R_390_TLS_LOAD)
3054             {
3055               if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3056                 {
3057                   /* IE->LE transition. Four valid cases:
3058                      lg %rx,(0,%ry)    -> sllg %rx,%ry,0
3059                      lg %rx,(%ry,0)    -> sllg %rx,%ry,0
3060                      lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3061                      lg %rx,(%r12,%ry) -> sllg %rx,%ry,0  */
3062                   unsigned int insn0, insn1, ry;
3063
3064                   insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3065                   insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3066                   if (insn1 != 0x0004)
3067                     {
3068                       invalid_tls_insn (input_bfd, input_section, rel);
3069                       return FALSE;
3070                     }
3071                   if ((insn0 & 0xff00f000) == 0xe3000000)
3072                     /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0  */
3073                     ry = (insn0 & 0x000f0000);
3074                   else if ((insn0 & 0xff0f0000) == 0xe3000000)
3075                     /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0  */
3076                     ry = (insn0 & 0x0000f000) << 4;
3077                   else if ((insn0 & 0xff00f000) == 0xe300c000)
3078                     /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0  */
3079                     ry = (insn0 & 0x000f0000);
3080                   else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3081                     /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0  */
3082                     ry = (insn0 & 0x0000f000) << 4;
3083                   else
3084                     {
3085                       invalid_tls_insn (input_bfd, input_section, rel);
3086                       return FALSE;
3087                     }
3088                   insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3089                   insn1 = 0x000d;
3090                   bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3091                   bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3092                 }
3093             }
3094           else if (r_type == R_390_TLS_GDCALL)
3095             {
3096               unsigned int insn0, insn1;
3097
3098               insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3099               insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3100               if ((insn0 & 0xffff0000) != 0xc0e50000)
3101                 {
3102                   invalid_tls_insn (input_bfd, input_section, rel);
3103                   return FALSE;
3104                 }
3105               if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3106                 {
3107                   /* GD->LE transition.
3108                      brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3109                   insn0 = 0xc0040000;
3110                   insn1 = 0x0000;
3111                 }
3112               else
3113                 {
3114                   /* GD->IE transition.
3115                      brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12)  */
3116                   insn0 = 0xe322c000;
3117                   insn1 = 0x0004;
3118                 }
3119               bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3120               bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3121             }
3122           else if (r_type == R_390_TLS_LDCALL)
3123             {
3124               if (!bfd_link_pic (info))
3125                 {
3126                   unsigned int insn0, insn1;
3127
3128                   insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3129                   insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3130                   if ((insn0 & 0xffff0000) != 0xc0e50000)
3131                     {
3132                       invalid_tls_insn (input_bfd, input_section, rel);
3133                       return FALSE;
3134                     }
3135                   /* LD->LE transition.
3136                      brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3137                   insn0 = 0xc0040000;
3138                   insn1 = 0x0000;
3139                   bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3140                   bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3141                 }
3142             }
3143           continue;
3144
3145         default:
3146           break;
3147         }
3148
3149       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3150          because such sections are not SEC_ALLOC and thus ld.so will
3151          not process them.  */
3152       if (unresolved_reloc
3153           && !((input_section->flags & SEC_DEBUGGING) != 0
3154                && h->def_dynamic)
3155           && _bfd_elf_section_offset (output_bfd, info, input_section,
3156                                       rel->r_offset) != (bfd_vma) -1)
3157         _bfd_error_handler
3158           /* xgettext:c-format */
3159           (_("%pB(%pA+%#" PRIx64 "): "
3160              "unresolvable %s relocation against symbol `%s'"),
3161            input_bfd,
3162            input_section,
3163            (uint64_t) rel->r_offset,
3164            howto->name,
3165            h->root.root.string);
3166
3167     do_relocation:
3168
3169       /* When applying a 24 bit reloc we need to start one byte
3170          earlier.  Otherwise the 32 bit get/put bfd operations might
3171          access a byte after the actual section.  */
3172       if (r_type == R_390_PC24DBL
3173           || r_type == R_390_PLT24DBL)
3174         rel->r_offset--;
3175
3176       if (r_type == R_390_20
3177           || r_type == R_390_GOT20
3178           || r_type == R_390_GOTPLT20
3179           || r_type == R_390_TLS_GOTIE20)
3180         {
3181           relocation += rel->r_addend;
3182           relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3183           r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3184                                         contents, rel->r_offset,
3185                                         relocation, 0);
3186         }
3187       else
3188         r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3189                                       contents, rel->r_offset,
3190                                       relocation, rel->r_addend);
3191
3192       if (r != bfd_reloc_ok)
3193         {
3194           const char *name;
3195
3196           if (h != NULL)
3197             name = h->root.root.string;
3198           else
3199             {
3200               name = bfd_elf_string_from_elf_section (input_bfd,
3201                                                       symtab_hdr->sh_link,
3202                                                       sym->st_name);
3203               if (name == NULL)
3204                 return FALSE;
3205               if (*name == '\0')
3206                 name = bfd_section_name (sec);
3207             }
3208
3209           if (r == bfd_reloc_overflow)
3210             (*info->callbacks->reloc_overflow)
3211               (info, (h ? &h->root : NULL), name, howto->name,
3212                (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3213           else
3214             {
3215               _bfd_error_handler
3216                 /* xgettext:c-format */
3217                 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3218                  input_bfd, input_section,
3219                  (uint64_t) rel->r_offset, name, (int) r);
3220               return FALSE;
3221             }
3222         }
3223     }
3224
3225   return TRUE;
3226 }
3227
3228 /* Generate the PLT slots together with the dynamic relocations needed
3229    for IFUNC symbols.  */
3230
3231 static void
3232 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3233                               struct bfd_link_info *info,
3234                               struct elf_link_hash_entry *h,
3235                               struct elf_s390_link_hash_table *htab,
3236                               bfd_vma plt_offset,
3237                               bfd_vma resolver_address)
3238 {
3239   bfd_vma plt_index;
3240   bfd_vma got_offset;
3241   Elf_Internal_Rela rela;
3242   bfd_byte *loc;
3243   asection *plt, *gotplt, *relplt;
3244
3245   if (htab->elf.iplt == NULL
3246       || htab->elf.igotplt == NULL
3247       || htab->elf.irelplt == NULL)
3248     abort ();
3249
3250   /* Index of the PLT slot within iplt section.  */
3251   plt_index = plt_offset / PLT_ENTRY_SIZE;
3252   plt = htab->elf.iplt;
3253   /* Offset into the igot.plt section.  */
3254   got_offset = plt_index * GOT_ENTRY_SIZE;
3255   gotplt = htab->elf.igotplt;
3256   relplt = htab->elf.irelplt;
3257
3258   /* Fill in the blueprint of a PLT.  */
3259   memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3260           PLT_ENTRY_SIZE);
3261
3262   /* Fixup the relative address to the GOT entry */
3263   bfd_put_32 (output_bfd,
3264               (gotplt->output_section->vma +
3265                gotplt->output_offset + got_offset
3266                - (plt->output_section->vma +
3267                   plt->output_offset +
3268                   plt_offset))/2,
3269               plt->contents + plt_offset + 2);
3270   /* Fixup the relative branch to PLT 0 */
3271   bfd_put_32 (output_bfd, - (plt->output_offset +
3272                              (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3273               plt->contents + plt_offset + 24);
3274   /* Fixup offset into .rela.plt section.  */
3275   bfd_put_32 (output_bfd, relplt->output_offset +
3276               plt_index * sizeof (Elf64_External_Rela),
3277               plt->contents + plt_offset + 28);
3278
3279   /* Fill in the entry in the global offset table.
3280      Points to instruction after GOT offset.  */
3281   bfd_put_64 (output_bfd,
3282               (plt->output_section->vma
3283                + plt->output_offset
3284                + plt_offset
3285                + 14),
3286               gotplt->contents + got_offset);
3287
3288   /* Fill in the entry in the .rela.plt section.  */
3289   rela.r_offset = (gotplt->output_section->vma
3290                    + gotplt->output_offset
3291                    + got_offset);
3292
3293   if (!h
3294       || h->dynindx == -1
3295       || ((bfd_link_executable (info)
3296            || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3297           && h->def_regular))
3298     {
3299       /* The symbol can be locally resolved.  */
3300       rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3301       rela.r_addend = resolver_address;
3302     }
3303   else
3304     {
3305       rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3306       rela.r_addend = 0;
3307     }
3308
3309   loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3310   bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3311 }
3312
3313
3314 /* Finish up dynamic symbol handling.  We set the contents of various
3315    dynamic sections here.  */
3316
3317 static bfd_boolean
3318 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3319                                 struct bfd_link_info *info,
3320                                 struct elf_link_hash_entry *h,
3321                                 Elf_Internal_Sym *sym)
3322 {
3323   struct elf_s390_link_hash_table *htab;
3324   struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3325
3326   htab = elf_s390_hash_table (info);
3327   if (htab == NULL)
3328     return FALSE;
3329
3330   if (h->plt.offset != (bfd_vma) -1)
3331     {
3332       bfd_vma plt_index;
3333       bfd_vma gotplt_offset;
3334       Elf_Internal_Rela rela;
3335       bfd_byte *loc;
3336
3337       /* This symbol has an entry in the procedure linkage table.  Set
3338          it up.  */
3339       if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3340         {
3341           elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3342             htab, h->plt.offset,
3343             eh->ifunc_resolver_address +
3344             eh->ifunc_resolver_section->output_offset +
3345             eh->ifunc_resolver_section->output_section->vma);
3346
3347           /* Do not return yet.  Handling of explicit GOT slots of
3348              IFUNC symbols is below.  */
3349         }
3350       else
3351         {
3352           if (h->dynindx == -1
3353               || htab->elf.splt == NULL
3354               || htab->elf.sgotplt == NULL
3355               || htab->elf.srelplt == NULL)
3356             abort ();
3357
3358           /* Calc. index no.
3359              Current offset - size first entry / entry size.  */
3360           plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3361
3362           /* The slots in the .got.plt correspond to the PLT slots in
3363              the same order.  */
3364           gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3365
3366           /* If .got.plt comes first it needs to contain the 3 header
3367              entries.  */
3368           if (!s390_gotplt_after_got_p (info))
3369             gotplt_offset += 3 * GOT_ENTRY_SIZE;
3370
3371           /* Fill in the blueprint of a PLT.  */
3372           memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3373                   PLT_ENTRY_SIZE);
3374
3375           /* The first instruction in the PLT entry is a LARL loading
3376              the address of the GOT slot.  We write the 4 byte
3377              immediate operand of the LARL instruction here.  */
3378           bfd_put_32 (output_bfd,
3379                       (htab->elf.sgotplt->output_section->vma +
3380                        htab->elf.sgotplt->output_offset + gotplt_offset
3381                        - (htab->elf.splt->output_section->vma +
3382                           htab->elf.splt->output_offset +
3383                           h->plt.offset))/2,
3384                       htab->elf.splt->contents + h->plt.offset + 2);
3385           /* Fixup the relative branch to PLT 0 */
3386           bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3387                                      (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3388                       htab->elf.splt->contents + h->plt.offset + 24);
3389           /* Fixup offset into .rela.plt section.  */
3390           bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3391                       htab->elf.splt->contents + h->plt.offset + 28);
3392
3393           /* Fill in the entry in the global offset table.
3394              Points to instruction after GOT offset.  */
3395           bfd_put_64 (output_bfd,
3396                       (htab->elf.splt->output_section->vma
3397                        + htab->elf.splt->output_offset
3398                        + h->plt.offset
3399                        + 14),
3400                       htab->elf.sgotplt->contents + gotplt_offset);
3401
3402           /* Fill in the entry in the .rela.plt section.  */
3403           rela.r_offset = (htab->elf.sgotplt->output_section->vma
3404                            + htab->elf.sgotplt->output_offset
3405                            + gotplt_offset);
3406           rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3407           rela.r_addend = 0;
3408           loc = htab->elf.srelplt->contents + plt_index *
3409             sizeof (Elf64_External_Rela);
3410           bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3411
3412           if (!h->def_regular)
3413             {
3414               /* Mark the symbol as undefined, rather than as defined in
3415                  the .plt section.  Leave the value alone.  This is a clue
3416                  for the dynamic linker, to make function pointer
3417                  comparisons work between an application and shared
3418                  library.  */
3419               sym->st_shndx = SHN_UNDEF;
3420             }
3421         }
3422     }
3423
3424   if (h->got.offset != (bfd_vma) -1
3425       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3426       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3427       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3428     {
3429       Elf_Internal_Rela rela;
3430       bfd_byte *loc;
3431
3432       /* This symbol has an entry in the global offset table.  Set it
3433          up.  */
3434       if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3435         abort ();
3436
3437       rela.r_offset = (htab->elf.sgot->output_section->vma
3438                        + htab->elf.sgot->output_offset
3439                        + (h->got.offset &~ (bfd_vma) 1));
3440
3441       if (h->def_regular && s390_is_ifunc_symbol_p (h))
3442         {
3443           if (bfd_link_pic (info))
3444             {
3445               /* An explicit GOT slot usage needs GLOB_DAT.  If the
3446                  symbol references local the implicit got.iplt slot
3447                  will be used and the IRELATIVE reloc has been created
3448                  above.  */
3449               goto do_glob_dat;
3450             }
3451           else
3452             {
3453               /* For non-shared objects explicit GOT slots must be
3454                  filled with the PLT slot address for pointer
3455                  equality reasons.  */
3456               bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3457                                        + htab->elf.iplt->output_offset
3458                                        + h->plt.offset),
3459                           htab->elf.sgot->contents + h->got.offset);
3460               return TRUE;
3461             }
3462         }
3463       else if (bfd_link_pic (info)
3464                && SYMBOL_REFERENCES_LOCAL (info, h))
3465         {
3466           if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3467             return TRUE;
3468
3469           /* If this is a static link, or it is a -Bsymbolic link and
3470              the symbol is defined locally or was forced to be local
3471              because of a version file, we just want to emit a
3472              RELATIVE reloc.  The entry in the global offset table
3473              will already have been initialized in the
3474              relocate_section function.  */
3475           if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3476             return FALSE;
3477           BFD_ASSERT((h->got.offset & 1) != 0);
3478           rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3479           rela.r_addend = (h->root.u.def.value
3480                            + h->root.u.def.section->output_section->vma
3481                            + h->root.u.def.section->output_offset);
3482         }
3483       else
3484         {
3485           BFD_ASSERT((h->got.offset & 1) == 0);
3486         do_glob_dat:
3487           bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3488           rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3489           rela.r_addend = 0;
3490         }
3491
3492       loc = htab->elf.srelgot->contents;
3493       loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3494       bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3495     }
3496
3497   if (h->needs_copy)
3498     {
3499       Elf_Internal_Rela rela;
3500       asection *s;
3501       bfd_byte *loc;
3502
3503       /* This symbols needs a copy reloc.  Set it up.  */
3504
3505       if (h->dynindx == -1
3506           || (h->root.type != bfd_link_hash_defined
3507               && h->root.type != bfd_link_hash_defweak)
3508           || htab->elf.srelbss == NULL)
3509         abort ();
3510
3511       rela.r_offset = (h->root.u.def.value
3512                        + h->root.u.def.section->output_section->vma
3513                        + h->root.u.def.section->output_offset);
3514       rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3515       rela.r_addend = 0;
3516       if (h->root.u.def.section == htab->elf.sdynrelro)
3517         s = htab->elf.sreldynrelro;
3518       else
3519         s = htab->elf.srelbss;
3520       loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3521       bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3522     }
3523
3524   /* Mark some specially defined symbols as absolute.  */
3525   if (h == htab->elf.hdynamic
3526       || h == htab->elf.hgot
3527       || h == htab->elf.hplt)
3528     sym->st_shndx = SHN_ABS;
3529
3530   return TRUE;
3531 }
3532
3533 /* Used to decide how to sort relocs in an optimal manner for the
3534    dynamic linker, before writing them out.  */
3535
3536 static enum elf_reloc_type_class
3537 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3538                            const asection *rel_sec ATTRIBUTE_UNUSED,
3539                            const Elf_Internal_Rela *rela)
3540 {
3541   bfd *abfd = info->output_bfd;
3542   const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3543   struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3544   unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3545   Elf_Internal_Sym sym;
3546
3547   if (htab->elf.dynsym == NULL
3548       || !bed->s->swap_symbol_in (abfd,
3549                                   (htab->elf.dynsym->contents
3550                                    + r_symndx * bed->s->sizeof_sym),
3551                                   0, &sym))
3552     abort ();
3553
3554   /* Check relocation against STT_GNU_IFUNC symbol.  */
3555   if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3556     return reloc_class_ifunc;
3557
3558   switch ((int) ELF64_R_TYPE (rela->r_info))
3559     {
3560     case R_390_RELATIVE:
3561       return reloc_class_relative;
3562     case R_390_JMP_SLOT:
3563       return reloc_class_plt;
3564     case R_390_COPY:
3565       return reloc_class_copy;
3566     default:
3567       return reloc_class_normal;
3568     }
3569 }
3570
3571 /* Finish up the dynamic sections.  */
3572
3573 static bfd_boolean
3574 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3575                                   struct bfd_link_info *info)
3576 {
3577   struct elf_s390_link_hash_table *htab;
3578   bfd *dynobj;
3579   asection *sdyn;
3580   bfd *ibfd;
3581   unsigned int i;
3582
3583   htab = elf_s390_hash_table (info);
3584   if (htab == NULL)
3585     return FALSE;
3586
3587   dynobj = htab->elf.dynobj;
3588   sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3589
3590   if (htab->elf.dynamic_sections_created)
3591     {
3592       Elf64_External_Dyn *dyncon, *dynconend;
3593
3594       if (sdyn == NULL || htab->elf.sgot == NULL)
3595         abort ();
3596
3597       dyncon = (Elf64_External_Dyn *) sdyn->contents;
3598       dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3599       for (; dyncon < dynconend; dyncon++)
3600         {
3601           Elf_Internal_Dyn dyn;
3602           asection *s;
3603
3604           bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3605
3606           switch (dyn.d_tag)
3607             {
3608             default:
3609               continue;
3610
3611             case DT_PLTGOT:
3612               /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3613               dyn.d_un.d_ptr = s390_got_pointer (info);
3614               break;
3615
3616             case DT_JMPREL:
3617               s = htab->elf.srelplt;
3618               dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3619               break;
3620
3621             case DT_PLTRELSZ:
3622               dyn.d_un.d_val = htab->elf.srelplt->size;
3623               if (htab->elf.irelplt)
3624                 dyn.d_un.d_val += htab->elf.irelplt->size;
3625               break;
3626
3627             case DT_RELASZ:
3628               /* The procedure linkage table relocs (DT_JMPREL) should
3629                  not be included in the overall relocs (DT_RELA).
3630                  Therefore, we override the DT_RELASZ entry here to
3631                  make it not include the JMPREL relocs.  Since the
3632                  linker script arranges for .rela.plt to follow all
3633                  other relocation sections, we don't have to worry
3634                  about changing the DT_RELA entry.  */
3635               dyn.d_un.d_val -= htab->elf.srelplt->size;
3636               if (htab->elf.irelplt)
3637                 dyn.d_un.d_val -= htab->elf.irelplt->size;
3638               break;
3639             }
3640
3641           bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3642         }
3643
3644       /* Fill in the special first entry in the procedure linkage table.  */
3645       if (htab->elf.splt && htab->elf.splt->size > 0)
3646         {
3647           /* fill in blueprint for plt 0 entry */
3648           memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3649                   PLT_FIRST_ENTRY_SIZE);
3650           /* The second instruction in the first PLT entry is a LARL
3651              loading the GOT pointer.  Fill in the LARL immediate
3652              address.  */
3653           bfd_put_32 (output_bfd,
3654                       (s390_got_pointer (info)
3655                        - htab->elf.splt->output_section->vma
3656                        - htab->elf.splt->output_offset - 6)/2,
3657                       htab->elf.splt->contents + 8);
3658         }
3659       if (elf_section_data (htab->elf.splt->output_section) != NULL)
3660         elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3661           = PLT_ENTRY_SIZE;
3662     }
3663
3664   if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
3665     {
3666       /* Fill in the first three entries in the global offset table.  */
3667       if (htab->elf.hgot->root.u.def.section->size > 0)
3668         {
3669           bfd_put_64 (output_bfd,
3670                       (sdyn == NULL ? (bfd_vma) 0
3671                        : sdyn->output_section->vma + sdyn->output_offset),
3672                       htab->elf.hgot->root.u.def.section->contents);
3673           /* One entry for shared object struct ptr.  */
3674           bfd_put_64 (output_bfd, (bfd_vma) 0,
3675                       htab->elf.hgot->root.u.def.section->contents + 8);
3676           /* One entry for _dl_runtime_resolve.  */
3677           bfd_put_64 (output_bfd, (bfd_vma) 0,
3678                       htab->elf.hgot->root.u.def.section->contents + 16);
3679         }
3680       elf_section_data (htab->elf.sgot->output_section)
3681         ->this_hdr.sh_entsize = 8;
3682     }
3683
3684   /* Finish dynamic symbol for local IFUNC symbols.  */
3685   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3686     {
3687       struct plt_entry *local_plt;
3688       Elf_Internal_Sym *isym;
3689       Elf_Internal_Shdr *symtab_hdr;
3690
3691       symtab_hdr = &elf_symtab_hdr (ibfd);
3692
3693       if (!is_s390_elf (ibfd))
3694         continue;
3695
3696       local_plt = elf_s390_local_plt (ibfd);
3697       if (local_plt != NULL)
3698         for (i = 0; i < symtab_hdr->sh_info; i++)
3699           {
3700             if (local_plt[i].plt.offset != (bfd_vma) -1)
3701               {
3702                 asection *sec = local_plt[i].sec;
3703                 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3704                 if (isym == NULL)
3705                   return FALSE;
3706
3707                 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3708                   elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3709                                                 local_plt[i].plt.offset,
3710                                                 isym->st_value
3711                                                 + sec->output_section->vma
3712                                                 + sec->output_offset);
3713
3714               }
3715           }
3716     }
3717
3718   return TRUE;
3719 }
3720 \f
3721 /* Support for core dump NOTE sections.  */
3722
3723 static bfd_boolean
3724 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3725 {
3726   int offset;
3727   size_t size;
3728
3729   switch (note->descsz)
3730     {
3731     default:
3732       return FALSE;
3733
3734     case 336:                   /* sizeof(struct elf_prstatus) on s390x */
3735       /* pr_cursig */
3736       elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3737
3738       /* pr_pid */
3739       elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3740
3741       /* pr_reg */
3742       offset = 112;
3743       size = 216;
3744       break;
3745     }
3746
3747   /* Make a ".reg/999" section.  */
3748   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3749                                           size, note->descpos + offset);
3750 }
3751
3752 static bfd_boolean
3753 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3754 {
3755   switch (note->descsz)
3756     {
3757     default:
3758       return FALSE;
3759
3760     case 136:                   /* sizeof(struct elf_prpsinfo) on s390x */
3761       elf_tdata (abfd)->core->pid
3762         = bfd_get_32 (abfd, note->descdata + 24);
3763       elf_tdata (abfd)->core->program
3764         = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3765       elf_tdata (abfd)->core->command
3766         = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3767     }
3768
3769   /* Note that for some reason, a spurious space is tacked
3770      onto the end of the args in some (at least one anyway)
3771      implementations, so strip it off if it exists.  */
3772
3773   {
3774     char *command = elf_tdata (abfd)->core->command;
3775     int n = strlen (command);
3776
3777     if (0 < n && command[n - 1] == ' ')
3778       command[n - 1] = '\0';
3779   }
3780
3781   return TRUE;
3782 }
3783
3784 static char *
3785 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3786                           int note_type, ...)
3787 {
3788   va_list ap;
3789
3790   switch (note_type)
3791     {
3792     default:
3793       return NULL;
3794
3795     case NT_PRPSINFO:
3796       {
3797         char data[136] ATTRIBUTE_NONSTRING = { 0 };
3798         const char *fname, *psargs;
3799
3800         va_start (ap, note_type);
3801         fname = va_arg (ap, const char *);
3802         psargs = va_arg (ap, const char *);
3803         va_end (ap);
3804
3805         strncpy (data + 40, fname, 16);
3806 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3807         DIAGNOSTIC_PUSH;
3808         /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3809            -Wstringop-truncation:
3810            https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3811          */
3812         DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3813 #endif
3814         strncpy (data + 56, psargs, 80);
3815 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3816         DIAGNOSTIC_POP;
3817 #endif
3818         return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3819                                    &data, sizeof (data));
3820       }
3821
3822     case NT_PRSTATUS:
3823       {
3824         char data[336] = { 0 };
3825         long pid;
3826         int cursig;
3827         const void *gregs;
3828
3829         va_start (ap, note_type);
3830         pid = va_arg (ap, long);
3831         cursig = va_arg (ap, int);
3832         gregs = va_arg (ap, const void *);
3833         va_end (ap);
3834
3835         bfd_put_16 (abfd, cursig, data + 12);
3836         bfd_put_32 (abfd, pid, data + 32);
3837         memcpy (data + 112, gregs, 216);
3838         return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3839                                    &data, sizeof (data));
3840       }
3841     }
3842   /* NOTREACHED */
3843 }
3844 \f
3845 /* Return address for Ith PLT stub in section PLT, for relocation REL
3846    or (bfd_vma) -1 if it should not be included.  */
3847
3848 static bfd_vma
3849 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3850                       const arelent *rel ATTRIBUTE_UNUSED)
3851 {
3852   return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3853 }
3854
3855 /* Merge backend specific data from an object file to the output
3856    object file when linking.  */
3857
3858 static bfd_boolean
3859 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3860 {
3861   if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3862     return TRUE;
3863
3864   return elf_s390_merge_obj_attributes (ibfd, info);
3865 }
3866
3867 /* We may add a PT_S390_PGSTE program header.  */
3868
3869 static int
3870 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3871                                      struct bfd_link_info *info)
3872 {
3873   struct elf_s390_link_hash_table *htab;
3874
3875   if (info)
3876     {
3877       htab = elf_s390_hash_table (info);
3878       if (htab)
3879         return htab->params->pgste;
3880     }
3881   return 0;
3882 }
3883
3884
3885 /* Add the PT_S390_PGSTE program header.  */
3886
3887 static bfd_boolean
3888 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3889 {
3890   struct elf_s390_link_hash_table *htab;
3891   struct elf_segment_map *m, *pm = NULL;
3892
3893   if (!abfd || !info)
3894     return TRUE;
3895
3896   htab = elf_s390_hash_table (info);
3897   if (!htab || !htab->params->pgste)
3898     return TRUE;
3899
3900   /* If there is already a PT_S390_PGSTE header, avoid adding
3901      another.  */
3902   m = elf_seg_map (abfd);
3903   while (m && m->p_type != PT_S390_PGSTE)
3904     {
3905       pm = m;
3906       m = m->next;
3907     }
3908
3909   if (m)
3910     return TRUE;
3911
3912   m = (struct elf_segment_map *)
3913     bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3914   if (m == NULL)
3915     return FALSE;
3916   m->p_type = PT_S390_PGSTE;
3917   m->count = 0;
3918   m->next = NULL;
3919   if (pm)
3920     pm->next = m;
3921
3922   return TRUE;
3923 }
3924
3925 bfd_boolean
3926 bfd_elf_s390_set_options (struct bfd_link_info *info,
3927                           struct s390_elf_params *params)
3928 {
3929   struct elf_s390_link_hash_table *htab;
3930
3931   if (info)
3932     {
3933       htab = elf_s390_hash_table (info);
3934       if (htab)
3935         htab->params = params;
3936     }
3937
3938   return TRUE;
3939 }
3940
3941
3942 /* Why was the hash table entry size definition changed from
3943    ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3944    this is the only reason for the s390_elf64_size_info structure.  */
3945
3946 const struct elf_size_info s390_elf64_size_info =
3947 {
3948   sizeof (Elf64_External_Ehdr),
3949   sizeof (Elf64_External_Phdr),
3950   sizeof (Elf64_External_Shdr),
3951   sizeof (Elf64_External_Rel),
3952   sizeof (Elf64_External_Rela),
3953   sizeof (Elf64_External_Sym),
3954   sizeof (Elf64_External_Dyn),
3955   sizeof (Elf_External_Note),
3956   8,            /* hash-table entry size.  */
3957   1,            /* internal relocations per external relocations.  */
3958   64,           /* arch_size.  */
3959   3,            /* log_file_align.  */
3960   ELFCLASS64, EV_CURRENT,
3961   bfd_elf64_write_out_phdrs,
3962   bfd_elf64_write_shdrs_and_ehdr,
3963   bfd_elf64_checksum_contents,
3964   bfd_elf64_write_relocs,
3965   bfd_elf64_swap_symbol_in,
3966   bfd_elf64_swap_symbol_out,
3967   bfd_elf64_slurp_reloc_table,
3968   bfd_elf64_slurp_symbol_table,
3969   bfd_elf64_swap_dyn_in,
3970   bfd_elf64_swap_dyn_out,
3971   bfd_elf64_swap_reloc_in,
3972   bfd_elf64_swap_reloc_out,
3973   bfd_elf64_swap_reloca_in,
3974   bfd_elf64_swap_reloca_out
3975 };
3976
3977 #define TARGET_BIG_SYM  s390_elf64_vec
3978 #define TARGET_BIG_NAME "elf64-s390"
3979 #define ELF_ARCH        bfd_arch_s390
3980 #define ELF_TARGET_ID   S390_ELF_DATA
3981 #define ELF_MACHINE_CODE EM_S390
3982 #define ELF_MACHINE_ALT1 EM_S390_OLD
3983 #define ELF_MAXPAGESIZE 0x1000
3984
3985 #define elf_backend_size_info           s390_elf64_size_info
3986
3987 #define elf_backend_can_gc_sections     1
3988 #define elf_backend_can_refcount        1
3989 #define elf_backend_want_got_plt        1
3990 #define elf_backend_plt_readonly        1
3991 #define elf_backend_want_plt_sym        0
3992 #define elf_backend_got_header_size     24
3993 #define elf_backend_want_dynrelro       1
3994 #define elf_backend_rela_normal         1
3995
3996 #define elf_info_to_howto               elf_s390_info_to_howto
3997
3998 #define bfd_elf64_bfd_is_local_label_name     elf_s390_is_local_label_name
3999 #define bfd_elf64_bfd_link_hash_table_create  elf_s390_link_hash_table_create
4000 #define bfd_elf64_bfd_reloc_type_lookup       elf_s390_reloc_type_lookup
4001 #define bfd_elf64_bfd_reloc_name_lookup       elf_s390_reloc_name_lookup
4002 #define bfd_elf64_bfd_merge_private_bfd_data  elf64_s390_merge_private_bfd_data
4003
4004 #define elf_backend_adjust_dynamic_symbol     elf_s390_adjust_dynamic_symbol
4005 #define elf_backend_check_relocs              elf_s390_check_relocs
4006 #define elf_backend_copy_indirect_symbol      elf_s390_copy_indirect_symbol
4007 #define elf_backend_create_dynamic_sections   _bfd_elf_create_dynamic_sections
4008 #define elf_backend_finish_dynamic_sections   elf_s390_finish_dynamic_sections
4009 #define elf_backend_finish_dynamic_symbol     elf_s390_finish_dynamic_symbol
4010 #define elf_backend_gc_mark_hook              elf_s390_gc_mark_hook
4011 #define elf_backend_reloc_type_class          elf_s390_reloc_type_class
4012 #define elf_backend_relocate_section          elf_s390_relocate_section
4013 #define elf_backend_size_dynamic_sections     elf_s390_size_dynamic_sections
4014 #define elf_backend_init_index_section        _bfd_elf_init_1_index_section
4015 #define elf_backend_grok_prstatus             elf_s390_grok_prstatus
4016 #define elf_backend_grok_psinfo               elf_s390_grok_psinfo
4017 #define elf_backend_write_core_note           elf_s390_write_core_note
4018 #define elf_backend_plt_sym_val               elf_s390_plt_sym_val
4019 #define elf_backend_sort_relocs_p             elf_s390_elf_sort_relocs_p
4020 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4021 #define elf_backend_modify_segment_map        elf_s390_modify_segment_map
4022
4023 #define bfd_elf64_mkobject              elf_s390_mkobject
4024 #define elf_backend_object_p            elf_s390_object_p
4025
4026 #include "elf64-target.h"