Coverage Report

Created: 2024-05-21 06:29

/src/binutils-gdb/bfd/elf32-s390.c
Line
Count
Source (jump to first uncovered line)
1
/* IBM S/390-specific support for 32-bit ELF
2
   Copyright (C) 2000-2024 Free Software Foundation, Inc.
3
   Contributed by Carl B. Pedersen and Martin Schwidefsky.
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 <stdarg.h>
29
30
static bfd_reloc_status_type
31
s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32
    asection *, bfd *, char **);
33
static bfd_reloc_status_type
34
s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35
          asection *, bfd *, char **);
36
37
/* The relocation "howto" table.  */
38
39
static reloc_howto_type elf_howto_table[] =
40
{
41
  HOWTO (R_390_NONE,    /* type */
42
   0,     /* rightshift */
43
   0,     /* size */
44
   0,     /* bitsize */
45
   false,     /* pc_relative */
46
   0,     /* bitpos */
47
   complain_overflow_dont, /* complain_on_overflow */
48
   bfd_elf_generic_reloc, /* special_function */
49
   "R_390_NONE",    /* name */
50
   false,     /* partial_inplace */
51
   0,     /* src_mask */
52
   0,     /* dst_mask */
53
   false),    /* pcrel_offset */
54
55
  HOWTO(R_390_8,   0, 1,  8, false, 0, complain_overflow_bitfield,
56
  bfd_elf_generic_reloc, "R_390_8",  false, 0,0x000000ff, false),
57
  HOWTO(R_390_12,  0, 2, 12, false, 0, complain_overflow_dont,
58
  bfd_elf_generic_reloc, "R_390_12",   false, 0,0x00000fff, false),
59
  HOWTO(R_390_16,  0, 2, 16, false, 0, complain_overflow_bitfield,
60
  bfd_elf_generic_reloc, "R_390_16",   false, 0,0x0000ffff, false),
61
  HOWTO(R_390_32,  0, 4, 32, false, 0, complain_overflow_bitfield,
62
  bfd_elf_generic_reloc, "R_390_32",   false, 0,0xffffffff, false),
63
  HOWTO(R_390_PC32,  0, 4, 32,  true, 0, complain_overflow_bitfield,
64
  bfd_elf_generic_reloc, "R_390_PC32",   false, 0,0xffffffff, true),
65
  HOWTO(R_390_GOT12,   0, 2, 12, false, 0, complain_overflow_bitfield,
66
  bfd_elf_generic_reloc, "R_390_GOT12",  false, 0,0x00000fff, false),
67
  HOWTO(R_390_GOT32,   0, 4, 32, false, 0, complain_overflow_bitfield,
68
  bfd_elf_generic_reloc, "R_390_GOT32",  false, 0,0xffffffff, false),
69
  HOWTO(R_390_PLT32,   0, 4, 32,  true, 0, complain_overflow_bitfield,
70
  bfd_elf_generic_reloc, "R_390_PLT32",  false, 0,0xffffffff, true),
71
  HOWTO(R_390_COPY,  0, 4, 32, false, 0, complain_overflow_bitfield,
72
  bfd_elf_generic_reloc, "R_390_COPY",   false, 0,0xffffffff, false),
73
  HOWTO(R_390_GLOB_DAT,  0, 4, 32, false, 0, complain_overflow_bitfield,
74
  bfd_elf_generic_reloc, "R_390_GLOB_DAT", false, 0,0xffffffff, false),
75
  HOWTO(R_390_JMP_SLOT,  0, 4, 32, false, 0, complain_overflow_bitfield,
76
  bfd_elf_generic_reloc, "R_390_JMP_SLOT", false, 0,0xffffffff, false),
77
  HOWTO(R_390_RELATIVE,  0, 4, 32,  true, 0, complain_overflow_bitfield,
78
  bfd_elf_generic_reloc, "R_390_RELATIVE", false, 0,0xffffffff, false),
79
  HOWTO(R_390_GOTOFF32,  0, 4, 32, false, 0, complain_overflow_bitfield,
80
  bfd_elf_generic_reloc, "R_390_GOTOFF32", false, 0,0xffffffff, false),
81
  HOWTO(R_390_GOTPC,   0, 4, 32,  true, 0, complain_overflow_bitfield,
82
  bfd_elf_generic_reloc, "R_390_GOTPC",  false, 0,0xffffffff, true),
83
  HOWTO(R_390_GOT16,   0, 2, 16, false, 0, complain_overflow_bitfield,
84
  bfd_elf_generic_reloc, "R_390_GOT16",  false, 0,0x0000ffff, false),
85
  HOWTO(R_390_PC16,  0, 2, 16,  true, 0, complain_overflow_bitfield,
86
  bfd_elf_generic_reloc, "R_390_PC16",   false, 0,0x0000ffff, true),
87
  HOWTO(R_390_PC16DBL,   1, 2, 16,  true, 0, complain_overflow_bitfield,
88
  bfd_elf_generic_reloc, "R_390_PC16DBL",  false, 0,0x0000ffff, true),
89
  HOWTO(R_390_PLT16DBL,  1, 2, 16,  true, 0, complain_overflow_bitfield,
90
  bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
91
  HOWTO(R_390_PC32DBL,   1, 4, 32,  true, 0, complain_overflow_bitfield,
92
  bfd_elf_generic_reloc, "R_390_PC32DBL",  false, 0,0xffffffff, true),
93
  HOWTO(R_390_PLT32DBL,  1, 4, 32,  true, 0, complain_overflow_bitfield,
94
  bfd_elf_generic_reloc, "R_390_PLT32DBL", false, 0,0xffffffff, true),
95
  HOWTO(R_390_GOTPCDBL,  1, 4, 32,  true, 0, complain_overflow_bitfield,
96
  bfd_elf_generic_reloc, "R_390_GOTPCDBL", false, 0,0xffffffff, true),
97
  EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64.  */
98
  EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64.  */
99
  EMPTY_HOWTO (R_390_GOT64),  /* Empty entry for R_390_GOT64.  */
100
  EMPTY_HOWTO (R_390_PLT64),  /* Empty entry for R_390_PLT64.  */
101
  HOWTO(R_390_GOTENT,  1, 4, 32,  true, 0, complain_overflow_bitfield,
102
  bfd_elf_generic_reloc, "R_390_GOTENT",   false, 0,0xffffffff, true),
103
  HOWTO(R_390_GOTOFF16,  0, 2, 16, false, 0, complain_overflow_bitfield,
104
  bfd_elf_generic_reloc, "R_390_GOTOFF16", false, 0,0x0000ffff, false),
105
  EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64.  */
106
  HOWTO(R_390_GOTPLT12,  0, 2, 12, false, 0, complain_overflow_dont,
107
  bfd_elf_generic_reloc, "R_390_GOTPLT12", false, 0,0x00000fff, false),
108
  HOWTO(R_390_GOTPLT16,  0, 2, 16, false, 0, complain_overflow_bitfield,
109
  bfd_elf_generic_reloc, "R_390_GOTPLT16", false, 0,0x0000ffff, false),
110
  HOWTO(R_390_GOTPLT32,  0, 4, 32, false, 0, complain_overflow_bitfield,
111
  bfd_elf_generic_reloc, "R_390_GOTPLT32", false, 0,0xffffffff, false),
112
  EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64.  */
113
  HOWTO(R_390_GOTPLTENT, 1, 4, 32,  true, 0, complain_overflow_bitfield,
114
  bfd_elf_generic_reloc, "R_390_GOTPLTENT",false, 0,0xffffffff, true),
115
  HOWTO(R_390_PLTOFF16,  0, 2, 16, false, 0, complain_overflow_bitfield,
116
  bfd_elf_generic_reloc, "R_390_PLTOFF16", false, 0,0x0000ffff, false),
117
  HOWTO(R_390_PLTOFF32,  0, 4, 32, false, 0, complain_overflow_bitfield,
118
  bfd_elf_generic_reloc, "R_390_PLTOFF32", false, 0,0xffffffff, false),
119
  EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64.  */
120
  HOWTO(R_390_TLS_LOAD, 0, 0, 0, false, 0, complain_overflow_dont,
121
  s390_tls_reloc, "R_390_TLS_LOAD", false, 0, 0, false),
122
  HOWTO(R_390_TLS_GDCALL, 0, 0, 0, false, 0, complain_overflow_dont,
123
  s390_tls_reloc, "R_390_TLS_GDCALL", false, 0, 0, false),
124
  HOWTO(R_390_TLS_LDCALL, 0, 0, 0, false, 0, complain_overflow_dont,
125
  s390_tls_reloc, "R_390_TLS_LDCALL", false, 0, 0, false),
126
  HOWTO(R_390_TLS_GD32, 0, 4, 32, false, 0, complain_overflow_bitfield,
127
  bfd_elf_generic_reloc, "R_390_TLS_GD32", false, 0, 0xffffffff, false),
128
  EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64.  */
129
  HOWTO(R_390_TLS_GOTIE12, 0, 2, 12, false, 0, complain_overflow_dont,
130
  bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", false, 0, 0x00000fff, false),
131
  HOWTO(R_390_TLS_GOTIE32, 0, 4, 32, false, 0, complain_overflow_bitfield,
132
  bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", false, 0, 0xffffffff, false),
133
  EMPTY_HOWTO (R_390_TLS_GOTIE64),  /* Empty entry for R_390_TLS_GOTIE64.  */
134
  HOWTO(R_390_TLS_LDM32, 0, 4, 32, false, 0, complain_overflow_bitfield,
135
  bfd_elf_generic_reloc, "R_390_TLS_LDM32", false, 0, 0xffffffff, false),
136
  EMPTY_HOWTO (R_390_TLS_LDM64),  /* Empty entry for R_390_TLS_LDM64.  */
137
  HOWTO(R_390_TLS_IE32, 0, 4, 32, false, 0, complain_overflow_bitfield,
138
  bfd_elf_generic_reloc, "R_390_TLS_IE32", false, 0, 0xffffffff, false),
139
  EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64.  */
140
  HOWTO(R_390_TLS_IEENT, 1, 4, 32, true, 0, complain_overflow_bitfield,
141
  bfd_elf_generic_reloc, "R_390_TLS_IEENT", false, 0, 0xffffffff, true),
142
  HOWTO(R_390_TLS_LE32, 0, 4, 32, false, 0, complain_overflow_bitfield,
143
  bfd_elf_generic_reloc, "R_390_TLS_LE32", false, 0, 0xffffffff, false),
144
  EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64.  */
145
  HOWTO(R_390_TLS_LDO32, 0, 4, 32, false, 0, complain_overflow_bitfield,
146
  bfd_elf_generic_reloc, "R_390_TLS_LDO32", false, 0, 0xffffffff, false),
147
  EMPTY_HOWTO (R_390_TLS_LDO64),  /* Empty entry for R_390_TLS_LDO64.  */
148
  HOWTO(R_390_TLS_DTPMOD, 0, 4, 32, false, 0, complain_overflow_bitfield,
149
  bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", false, 0, 0xffffffff, false),
150
  HOWTO(R_390_TLS_DTPOFF, 0, 4, 32, false, 0, complain_overflow_bitfield,
151
  bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", false, 0, 0xffffffff, false),
152
  HOWTO(R_390_TLS_TPOFF, 0, 4, 32, false, 0, complain_overflow_bitfield,
153
  bfd_elf_generic_reloc, "R_390_TLS_TPOFF", false, 0, 0xffffffff, false),
154
  HOWTO(R_390_20,  0, 4, 20, false, 8, complain_overflow_dont,
155
  s390_elf_ldisp_reloc, "R_390_20",      false, 0,0x0fffff00, false),
156
  HOWTO(R_390_GOT20,   0, 4, 20, false, 8, complain_overflow_dont,
157
  s390_elf_ldisp_reloc, "R_390_GOT20",   false, 0,0x0fffff00, false),
158
  HOWTO(R_390_GOTPLT20,  0, 4, 20, false, 8, complain_overflow_dont,
159
  s390_elf_ldisp_reloc, "R_390_GOTPLT20", false, 0,0x0fffff00, false),
160
  HOWTO(R_390_TLS_GOTIE20, 0, 4, 20, false, 8, complain_overflow_dont,
161
  s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", false, 0,0x0fffff00, false),
162
  HOWTO(R_390_IRELATIVE, 0, 4, 32, true, 0, complain_overflow_bitfield,
163
  bfd_elf_generic_reloc, "R_390_IRELATIVE", false, 0, 0xffffffff, false),
164
  HOWTO(R_390_PC12DBL,   1, 2, 12,  true, 0, complain_overflow_bitfield,
165
  bfd_elf_generic_reloc, "R_390_PC12DBL",  false, 0,0x00000fff, true),
166
  HOWTO(R_390_PLT12DBL,  1, 2, 12,  true, 0, complain_overflow_bitfield,
167
  bfd_elf_generic_reloc, "R_390_PLT12DBL", false, 0,0x00000fff, true),
168
  HOWTO(R_390_PC24DBL,   1, 4, 24,  true, 0, complain_overflow_bitfield,
169
  bfd_elf_generic_reloc, "R_390_PC24DBL",  false, 0,0x00ffffff, true),
170
  HOWTO(R_390_PLT24DBL,  1, 4, 24,  true, 0, complain_overflow_bitfield,
171
  bfd_elf_generic_reloc, "R_390_PLT24DBL", false, 0,0x00ffffff, true),
172
};
173
174
/* GNU extension to record C++ vtable hierarchy.  */
175
static reloc_howto_type elf32_s390_vtinherit_howto =
176
  HOWTO (R_390_GNU_VTINHERIT, 0,4,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false);
177
static reloc_howto_type elf32_s390_vtentry_howto =
178
  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);
179
180
static reloc_howto_type *
181
elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
182
          bfd_reloc_code_real_type code)
183
0
{
184
0
  switch (code)
185
0
    {
186
0
    case BFD_RELOC_NONE:
187
0
      return &elf_howto_table[(int) R_390_NONE];
188
0
    case BFD_RELOC_8:
189
0
      return &elf_howto_table[(int) R_390_8];
190
0
    case BFD_RELOC_390_12:
191
0
      return &elf_howto_table[(int) R_390_12];
192
0
    case BFD_RELOC_16:
193
0
      return &elf_howto_table[(int) R_390_16];
194
0
    case BFD_RELOC_32:
195
0
      return &elf_howto_table[(int) R_390_32];
196
0
    case BFD_RELOC_CTOR:
197
0
      return &elf_howto_table[(int) R_390_32];
198
0
    case BFD_RELOC_32_PCREL:
199
0
      return &elf_howto_table[(int) R_390_PC32];
200
0
    case BFD_RELOC_390_GOT12:
201
0
      return &elf_howto_table[(int) R_390_GOT12];
202
0
    case BFD_RELOC_32_GOT_PCREL:
203
0
      return &elf_howto_table[(int) R_390_GOT32];
204
0
    case BFD_RELOC_390_PLT32:
205
0
      return &elf_howto_table[(int) R_390_PLT32];
206
0
    case BFD_RELOC_390_COPY:
207
0
      return &elf_howto_table[(int) R_390_COPY];
208
0
    case BFD_RELOC_390_GLOB_DAT:
209
0
      return &elf_howto_table[(int) R_390_GLOB_DAT];
210
0
    case BFD_RELOC_390_JMP_SLOT:
211
0
      return &elf_howto_table[(int) R_390_JMP_SLOT];
212
0
    case BFD_RELOC_390_RELATIVE:
213
0
      return &elf_howto_table[(int) R_390_RELATIVE];
214
0
    case BFD_RELOC_32_GOTOFF:
215
0
      return &elf_howto_table[(int) R_390_GOTOFF32];
216
0
    case BFD_RELOC_390_GOTPC:
217
0
      return &elf_howto_table[(int) R_390_GOTPC];
218
0
    case BFD_RELOC_390_GOT16:
219
0
      return &elf_howto_table[(int) R_390_GOT16];
220
0
    case BFD_RELOC_16_PCREL:
221
0
      return &elf_howto_table[(int) R_390_PC16];
222
0
    case BFD_RELOC_390_PC12DBL:
223
0
      return &elf_howto_table[(int) R_390_PC12DBL];
224
0
    case BFD_RELOC_390_PLT12DBL:
225
0
      return &elf_howto_table[(int) R_390_PLT12DBL];
226
0
    case BFD_RELOC_390_PC16DBL:
227
0
      return &elf_howto_table[(int) R_390_PC16DBL];
228
0
    case BFD_RELOC_390_PLT16DBL:
229
0
      return &elf_howto_table[(int) R_390_PLT16DBL];
230
0
    case BFD_RELOC_390_PC24DBL:
231
0
      return &elf_howto_table[(int) R_390_PC24DBL];
232
0
    case BFD_RELOC_390_PLT24DBL:
233
0
      return &elf_howto_table[(int) R_390_PLT24DBL];
234
0
    case BFD_RELOC_390_PC32DBL:
235
0
      return &elf_howto_table[(int) R_390_PC32DBL];
236
0
    case BFD_RELOC_390_PLT32DBL:
237
0
      return &elf_howto_table[(int) R_390_PLT32DBL];
238
0
    case BFD_RELOC_390_GOTPCDBL:
239
0
      return &elf_howto_table[(int) R_390_GOTPCDBL];
240
0
    case BFD_RELOC_390_GOTENT:
241
0
      return &elf_howto_table[(int) R_390_GOTENT];
242
0
    case BFD_RELOC_16_GOTOFF:
243
0
      return &elf_howto_table[(int) R_390_GOTOFF16];
244
0
    case BFD_RELOC_390_GOTPLT12:
245
0
      return &elf_howto_table[(int) R_390_GOTPLT12];
246
0
    case BFD_RELOC_390_GOTPLT16:
247
0
      return &elf_howto_table[(int) R_390_GOTPLT16];
248
0
    case BFD_RELOC_390_GOTPLT32:
249
0
      return &elf_howto_table[(int) R_390_GOTPLT32];
250
0
    case BFD_RELOC_390_GOTPLTENT:
251
0
      return &elf_howto_table[(int) R_390_GOTPLTENT];
252
0
    case BFD_RELOC_390_PLTOFF16:
253
0
      return &elf_howto_table[(int) R_390_PLTOFF16];
254
0
    case BFD_RELOC_390_PLTOFF32:
255
0
      return &elf_howto_table[(int) R_390_PLTOFF32];
256
0
    case BFD_RELOC_390_TLS_LOAD:
257
0
      return &elf_howto_table[(int) R_390_TLS_LOAD];
258
0
    case BFD_RELOC_390_TLS_GDCALL:
259
0
      return &elf_howto_table[(int) R_390_TLS_GDCALL];
260
0
    case BFD_RELOC_390_TLS_LDCALL:
261
0
      return &elf_howto_table[(int) R_390_TLS_LDCALL];
262
0
    case BFD_RELOC_390_TLS_GD32:
263
0
      return &elf_howto_table[(int) R_390_TLS_GD32];
264
0
    case BFD_RELOC_390_TLS_GOTIE12:
265
0
      return &elf_howto_table[(int) R_390_TLS_GOTIE12];
266
0
    case BFD_RELOC_390_TLS_GOTIE32:
267
0
      return &elf_howto_table[(int) R_390_TLS_GOTIE32];
268
0
    case BFD_RELOC_390_TLS_LDM32:
269
0
      return &elf_howto_table[(int) R_390_TLS_LDM32];
270
0
    case BFD_RELOC_390_TLS_IE32:
271
0
      return &elf_howto_table[(int) R_390_TLS_IE32];
272
0
    case BFD_RELOC_390_TLS_IEENT:
273
0
      return &elf_howto_table[(int) R_390_TLS_IEENT];
274
0
    case BFD_RELOC_390_TLS_LE32:
275
0
      return &elf_howto_table[(int) R_390_TLS_LE32];
276
0
    case BFD_RELOC_390_TLS_LDO32:
277
0
      return &elf_howto_table[(int) R_390_TLS_LDO32];
278
0
    case BFD_RELOC_390_TLS_DTPMOD:
279
0
      return &elf_howto_table[(int) R_390_TLS_DTPMOD];
280
0
    case BFD_RELOC_390_TLS_DTPOFF:
281
0
      return &elf_howto_table[(int) R_390_TLS_DTPOFF];
282
0
    case BFD_RELOC_390_TLS_TPOFF:
283
0
      return &elf_howto_table[(int) R_390_TLS_TPOFF];
284
0
    case BFD_RELOC_390_20:
285
0
      return &elf_howto_table[(int) R_390_20];
286
0
    case BFD_RELOC_390_GOT20:
287
0
      return &elf_howto_table[(int) R_390_GOT20];
288
0
    case BFD_RELOC_390_GOTPLT20:
289
0
      return &elf_howto_table[(int) R_390_GOTPLT20];
290
0
    case BFD_RELOC_390_TLS_GOTIE20:
291
0
      return &elf_howto_table[(int) R_390_TLS_GOTIE20];
292
0
    case BFD_RELOC_390_IRELATIVE:
293
0
      return &elf_howto_table[(int) R_390_IRELATIVE];
294
0
    case BFD_RELOC_VTABLE_INHERIT:
295
0
      return &elf32_s390_vtinherit_howto;
296
0
    case BFD_RELOC_VTABLE_ENTRY:
297
0
      return &elf32_s390_vtentry_howto;
298
0
    default:
299
0
      break;
300
0
    }
301
0
  return 0;
302
0
}
303
304
static reloc_howto_type *
305
elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
306
          const char *r_name)
307
0
{
308
0
  unsigned int i;
309
310
0
  for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
311
0
    if (elf_howto_table[i].name != NULL
312
0
  && strcasecmp (elf_howto_table[i].name, r_name) == 0)
313
0
      return &elf_howto_table[i];
314
315
0
  if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
316
0
    return &elf32_s390_vtinherit_howto;
317
0
  if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
318
0
    return &elf32_s390_vtentry_howto;
319
320
0
  return NULL;
321
0
}
322
323
/* We need to use ELF32_R_TYPE so we have our own copy of this function,
324
   and elf32-s390.c has its own copy.  */
325
326
static bool
327
elf_s390_info_to_howto (bfd *abfd,
328
      arelent *cache_ptr,
329
      Elf_Internal_Rela *dst)
330
0
{
331
0
  unsigned int r_type = ELF32_R_TYPE(dst->r_info);
332
333
0
  switch (r_type)
334
0
    {
335
0
    case R_390_GNU_VTINHERIT:
336
0
      cache_ptr->howto = &elf32_s390_vtinherit_howto;
337
0
      break;
338
339
0
    case R_390_GNU_VTENTRY:
340
0
      cache_ptr->howto = &elf32_s390_vtentry_howto;
341
0
      break;
342
343
0
    default:
344
0
      if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
345
0
  {
346
    /* xgettext:c-format */
347
0
    _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
348
0
            abfd, r_type);
349
0
    bfd_set_error (bfd_error_bad_value);
350
0
    return false;
351
0
  }
352
0
      cache_ptr->howto = &elf_howto_table[r_type];
353
0
    }
354
355
0
  return true;
356
0
}
357
358
/* A relocation function which doesn't do anything.  */
359
static bfd_reloc_status_type
360
s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
361
    arelent *reloc_entry,
362
    asymbol *symbol ATTRIBUTE_UNUSED,
363
    void * data ATTRIBUTE_UNUSED,
364
    asection *input_section,
365
    bfd *output_bfd,
366
    char **error_message ATTRIBUTE_UNUSED)
367
0
{
368
0
  if (output_bfd)
369
0
    reloc_entry->address += input_section->output_offset;
370
0
  return bfd_reloc_ok;
371
0
}
372
373
/* Handle the large displacement relocs.  */
374
static bfd_reloc_status_type
375
s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
376
          arelent *reloc_entry,
377
          asymbol *symbol,
378
          void * data ATTRIBUTE_UNUSED,
379
          asection *input_section,
380
          bfd *output_bfd,
381
          char **error_message ATTRIBUTE_UNUSED)
382
0
{
383
0
  reloc_howto_type *howto = reloc_entry->howto;
384
0
  bfd_vma relocation;
385
0
  bfd_vma insn;
386
387
0
  if (output_bfd != (bfd *) NULL
388
0
      && (symbol->flags & BSF_SECTION_SYM) == 0
389
0
      && (! howto->partial_inplace
390
0
    || reloc_entry->addend == 0))
391
0
    {
392
0
      reloc_entry->address += input_section->output_offset;
393
0
      return bfd_reloc_ok;
394
0
    }
395
396
0
  if (output_bfd != NULL)
397
0
    return bfd_reloc_continue;
398
399
0
  if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
400
0
    return bfd_reloc_outofrange;
401
402
0
  relocation = (symbol->value
403
0
    + symbol->section->output_section->vma
404
0
    + symbol->section->output_offset);
405
0
  relocation += reloc_entry->addend;
406
0
  if (howto->pc_relative)
407
0
    {
408
0
      relocation -= (input_section->output_section->vma
409
0
         + input_section->output_offset);
410
0
      relocation -= reloc_entry->address;
411
0
    }
412
413
0
  insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
414
0
  insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
415
0
  bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
416
417
0
  if ((bfd_signed_vma) relocation < - 0x80000
418
0
      || (bfd_signed_vma) relocation > 0x7ffff)
419
0
    return bfd_reloc_overflow;
420
0
  else
421
0
    return bfd_reloc_ok;
422
0
}
423
424
static bool
425
elf_s390_is_local_label_name (bfd *abfd, const char *name)
426
0
{
427
0
  if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
428
0
    return true;
429
430
0
  return _bfd_elf_is_local_label_name (abfd, name);
431
0
}
432
433
/* Functions for the 390 ELF linker.  */
434
435
/* The name of the dynamic interpreter.  This is put in the .interp
436
   section.  */
437
438
0
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
439
440
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
441
   copying dynamic variables from a shared lib into an app's dynbss
442
   section, and instead use a dynamic relocation to point into the
443
   shared lib.  */
444
0
#define ELIMINATE_COPY_RELOCS 1
445
446
/* The size in bytes of the first entry in the procedure linkage table.  */
447
0
#define PLT_FIRST_ENTRY_SIZE 32
448
/* The size in bytes of an entry in the procedure linkage table.  */
449
0
#define PLT_ENTRY_SIZE 32
450
451
0
#define GOT_ENTRY_SIZE 4
452
453
0
#define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
454
455
/* The first three entries in a procedure linkage table are reserved,
456
   and the initial contents are unimportant (we zero them out).
457
   Subsequent entries look like this.  See the SVR4 ABI 386
458
   supplement to see how this works.  */
459
460
/* For the s390, simple addr offset can only be 0 - 4096.
461
   To use the full 2 GB address space, several instructions
462
   are needed to load an address in a register and execute
463
   a branch( or just saving the address)
464
465
   Furthermore, only r 0 and 1 are free to use!!!  */
466
467
/* The first 3 words in the GOT are then reserved.
468
   Word 0 is the address of the dynamic table.
469
   Word 1 is a pointer to a structure describing the object
470
   Word 2 is used to point to the loader entry address.
471
472
   The code for position independent PLT entries looks like this:
473
474
   r12 holds addr of the current GOT at entry to the PLT
475
476
   The GOT holds the address in the PLT to be executed.
477
   The loader then gets:
478
   24(15) =  Pointer to the structure describing the object.
479
   28(15) =  Offset into rela.plt
480
481
   The loader  must  then find the module where the function is
482
   and insert the address in the GOT.
483
484
  Note: 390 can only address +- 64 K relative.
485
  We check if offset > 65536, then make a relative branch -64xxx
486
  back to a previous defined branch
487
488
PLT1: BASR 1,0         # 2 bytes
489
      L    1,22(1)     # 4 bytes  Load offset in GOT in r 1
490
      L    1,(1,12)    # 4 bytes  Load address from GOT in r1
491
      BCR  15,1        # 2 bytes  Jump to address
492
RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
493
      L    1,14(1)     # 4 bytes  Load offset in symol table in r1
494
      BRC  15,-x       # 4 bytes  Jump to start of PLT
495
      .word 0        # 2 bytes filler
496
      .long ?        # 4 bytes  offset in GOT
497
      .long ?        # 4 bytes  offset into rela.plt
498
499
  This was the general case. There are two additional, optimizes PLT
500
  definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
501
  First the one for GOT offsets < 4096:
502
503
PLT1: L    1,<offset>(12) # 4 bytes  Load address from GOT in R1
504
      BCR  15,1     # 2 bytes  Jump to address
505
      .word 0,0,0   # 6 bytes  filler
506
RET1: BASR 1,0      # 2 bytes  Return from GOT 1st time
507
      L    1,14(1)    # 4 bytes  Load offset in rela.plt in r1
508
      BRC  15,-x    # 4 bytes  Jump to start of PLT
509
      .word 0,0,0   # 6 bytes  filler
510
      .long ?     # 4 bytes  offset into rela.plt
511
512
  Second the one for GOT offsets < 32768:
513
514
PLT1: LHI  1,<offset>   # 4 bytes  Load offset in GOT to r1
515
      L    1,(1,12)   # 4 bytes  Load address from GOT to r1
516
      BCR  15,1     # 2 bytes  Jump to address
517
      .word 0     # 2 bytes  filler
518
RET1: BASR 1,0      # 2 bytes  Return from GOT 1st time
519
      L    1,14(1)    # 4 bytes  Load offset in rela.plt in r1
520
      BRC  15,-x    # 4 bytes  Jump to start of PLT
521
      .word 0,0,0   # 6 bytes  filler
522
      .long ?     # 4 bytes  offset into rela.plt
523
524
Total = 32 bytes per PLT entry
525
526
   The code for static build PLT entries looks like this:
527
528
PLT1: BASR 1,0         # 2 bytes
529
      L    1,22(1)     # 4 bytes  Load address of GOT entry
530
      L    1,0(0,1)    # 4 bytes  Load address from GOT in r1
531
      BCR  15,1        # 2 bytes  Jump to address
532
RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
533
      L    1,14(1)     # 4 bytes  Load offset in symbol table in r1
534
      BRC  15,-x       # 4 bytes  Jump to start of PLT
535
      .word 0        # 2 bytes  filler
536
      .long ?        # 4 bytes  address of GOT entry
537
      .long ?        # 4 bytes  offset into rela.plt  */
538
539
static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
540
  {
541
    0x0d, 0x10,           /* basr    %r1,%r0     */
542
    0x58, 0x10, 0x10, 0x16,       /* l       %r1,22(%r1) */
543
    0x58, 0x10, 0x10, 0x00,       /* l       %r1,0(%r1)  */
544
    0x07, 0xf1,           /* br      %r1     */
545
    0x0d, 0x10,           /* basr    %r1,%r0     */
546
    0x58, 0x10, 0x10, 0x0e,       /* l       %r1,14(%r1) */
547
    0xa7, 0xf4, 0x00, 0x00,       /* j       first plt   */
548
    0x00, 0x00,           /* padding       */
549
    0x00, 0x00, 0x00, 0x00,       /* GOT offset    */
550
    0x00, 0x00, 0x00, 0x00        /* rela.plt offset     */
551
  };
552
553
/* Generic PLT pic entry.  */
554
static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
555
  {
556
    0x0d, 0x10,           /* basr    %r1,%r0         */
557
    0x58, 0x10, 0x10, 0x16,       /* l       %r1,22(%r1)     */
558
    0x58, 0x11, 0xc0, 0x00,       /* l       %r1,0(%r1,%r12) */
559
    0x07, 0xf1,           /* br      %r1         */
560
    0x0d, 0x10,           /* basr    %r1,%r0         */
561
    0x58, 0x10, 0x10, 0x0e,       /* l       %r1,14(%r1)     */
562
    0xa7, 0xf4, 0x00, 0x00,       /* j       first plt       */
563
    0x00, 0x00,           /* padding           */
564
    0x00, 0x00, 0x00, 0x00,       /* GOT offset        */
565
    0x00, 0x00, 0x00, 0x00        /* rela.plt offset         */
566
  };
567
568
/* Optimized PLT pic entry for GOT offset < 4k.  xx will be replaced
569
   when generating the PLT slot with the GOT offset.  */
570
static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
571
  {
572
    0x58, 0x10, 0xc0, 0x00,       /* l       %r1,xx(%r12) */
573
    0x07, 0xf1,           /* br      %r1      */
574
    0x00, 0x00, 0x00, 0x00,       /* padding        */
575
    0x00, 0x00,
576
    0x0d, 0x10,           /* basr    %r1,%r0      */
577
    0x58, 0x10, 0x10, 0x0e,       /* l       %r1,14(%r1)  */
578
    0xa7, 0xf4, 0x00, 0x00,       /* j       first plt    */
579
    0x00, 0x00, 0x00, 0x00,
580
    0x00, 0x00, 0x00, 0x00
581
  };
582
583
/* Optimized PLT pic entry for GOT offset < 32k.  xx will be replaced
584
   when generating the PLT slot with the GOT offset.  */
585
static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
586
  {
587
    0xa7, 0x18, 0x00, 0x00,       /* lhi     %r1,xx        */
588
    0x58, 0x11, 0xc0, 0x00,       /* l       %r1,0(%r1,%r12) */
589
    0x07, 0xf1,           /* br      %r1         */
590
    0x00, 0x00,
591
    0x0d, 0x10,           /* basr    %r1,%r0         */
592
    0x58, 0x10, 0x10, 0x0e,       /* l       %r1,14(%r1)     */
593
    0xa7, 0xf4, 0x00, 0x00,       /* j       first plt       */
594
    0x00, 0x00, 0x00, 0x00,
595
    0x00, 0x00, 0x00, 0x00,
596
    0x00, 0x00
597
  };
598
599
/* The first PLT entry pushes the offset into the rela.plt
600
   from R1 onto the stack at 8(15) and the loader object info
601
   at 12(15), loads the loader address in R1 and jumps to it.  */
602
603
/* The first entry in the PLT for PIC code:
604
605
PLT0:
606
   ST 1,28(15)  # R1 has offset into rela.plt
607
   L  1,4(12)   # Get loader ino(object struct address)
608
   ST 1,24(15)  # Store address
609
   L  1,8(12)   # Entry address of loader in R1
610
   BR 1   # Jump to loader
611
612
   The first entry in the PLT for static code:
613
614
PLT0:
615
   ST 1,28(15)      # R1 has offset into rela.plt
616
   BASR 1,0
617
   L  1,18(0,1)     # Get address of GOT
618
   MVC  24(4,15),4(1) # Move loader ino to stack
619
   L  1,8(1)        # Get address of loader
620
   BR 1       # Jump to loader
621
   .word 0        # filler
622
   .long got        # address of GOT  */
623
624
static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
625
  {
626
    0x50, 0x10, 0xf0, 0x1c,         /* st  %r1,28(%r15)    */
627
    0x0d, 0x10,             /* basr  %r1,%r0     */
628
    0x58, 0x10, 0x10, 0x12,         /* l   %r1,18(%r1)     */
629
    0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04,       /* mvc   24(4,%r15),4(%r1) */
630
    0x58, 0x10, 0x10, 0x08,         /* l   %r1,8(%r1)    */
631
    0x07, 0xf1,             /* br  %r1       */
632
    0x00, 0x00, 0x00, 0x00,
633
    0x00, 0x00, 0x00, 0x00,
634
    0x00, 0x00
635
  };
636
637
static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
638
  {
639
    0x50, 0x10, 0xf0, 0x1c,     /* st    %r1,28(%r15)  */
640
    0x58, 0x10, 0xc0, 0x04,     /* l     %r1,4(%r12)   */
641
    0x50, 0x10, 0xf0, 0x18,     /* st    %r1,24(%r15)  */
642
    0x58, 0x10, 0xc0, 0x08,     /* l     %r1,8(%r12)   */
643
    0x07, 0xf1,         /* br    %r1     */
644
    0x00, 0x00, 0x00, 0x00,
645
    0x00, 0x00, 0x00, 0x00,
646
    0x00, 0x00, 0x00, 0x00,
647
    0x00, 0x00
648
  };
649
650
651
/* s390 ELF linker hash entry.  */
652
653
struct elf_s390_link_hash_entry
654
{
655
  struct elf_link_hash_entry elf;
656
657
  /* Number of GOTPLT references for a function.  */
658
  bfd_signed_vma gotplt_refcount;
659
660
0
#define GOT_UNKNOWN 0
661
0
#define GOT_NORMAL  1
662
0
#define GOT_TLS_GD  2
663
0
#define GOT_TLS_IE  3
664
0
#define GOT_TLS_IE_NLT  4
665
  unsigned char tls_type;
666
667
  /* For pointer equality reasons we might need to change the symbol
668
     type from STT_GNU_IFUNC to STT_FUNC together with its value and
669
     section entry.  So after alloc_dynrelocs only these values should
670
     be used.  In order to check whether a symbol is IFUNC use
671
     s390_is_ifunc_symbol_p.  */
672
  bfd_vma ifunc_resolver_address;
673
  asection *ifunc_resolver_section;
674
};
675
676
#define elf_s390_hash_entry(ent) \
677
0
  ((struct elf_s390_link_hash_entry *)(ent))
678
679
/* This structure represents an entry in the local PLT list needed for
680
   local IFUNC symbols.  */
681
struct plt_entry
682
{
683
  /* The section of the local symbol.
684
     Set in relocate_section and used in finish_dynamic_sections.  */
685
  asection *sec;
686
687
  union
688
  {
689
    bfd_signed_vma refcount;
690
    bfd_vma offset;
691
  } plt;
692
};
693
694
/* NOTE: Keep this structure in sync with
695
   the one declared in elf64-s390.c.  */
696
struct elf_s390_obj_tdata
697
{
698
  struct elf_obj_tdata root;
699
700
  /* A local PLT is needed for ifunc symbols.  */
701
  struct plt_entry *local_plt;
702
703
  /* TLS type for each local got entry.  */
704
  char *local_got_tls_type;
705
};
706
707
#define elf_s390_tdata(abfd) \
708
0
  ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
709
710
#define elf_s390_local_plt(abfd)    \
711
0
  (elf_s390_tdata (abfd)->local_plt)
712
713
#define elf_s390_local_got_tls_type(abfd) \
714
0
  (elf_s390_tdata (abfd)->local_got_tls_type)
715
716
#define is_s390_elf(bfd) \
717
0
  (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
718
0
   && elf_tdata (bfd) != NULL \
719
0
   && elf_object_id (bfd) == S390_ELF_DATA)
720
721
static bool
722
elf_s390_mkobject (bfd *abfd)
723
24.7k
{
724
24.7k
  return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
725
24.7k
          S390_ELF_DATA);
726
24.7k
}
727
728
static bool
729
elf_s390_object_p (bfd *abfd)
730
316
{
731
  /* Set the right machine number for an s390 elf32 file.  */
732
316
  return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
733
316
}
734
735
/* s390 ELF linker hash table.  */
736
737
struct elf_s390_link_hash_table
738
{
739
  struct elf_link_hash_table elf;
740
741
  /* Short-cuts to get to dynamic linker sections.  */
742
  asection *irelifunc;
743
744
  union
745
  {
746
    bfd_signed_vma refcount;
747
    bfd_vma offset;
748
  } tls_ldm_got;
749
};
750
751
/* Get the s390 ELF linker hash table from a link_info structure.  */
752
753
#define elf_s390_hash_table(p) \
754
0
  ((is_elf_hash_table ((p)->hash)          \
755
0
    && elf_hash_table_id (elf_hash_table (p)) == S390_ELF_DATA)   \
756
0
   ? (struct elf_s390_link_hash_table *) (p)->hash : NULL)
757
758
#undef ELF64
759
#include "elf-s390-common.c"
760
761
/* Create an entry in an s390 ELF linker hash table.  */
762
763
static struct bfd_hash_entry *
764
link_hash_newfunc (struct bfd_hash_entry *entry,
765
       struct bfd_hash_table *table,
766
       const char *string)
767
0
{
768
  /* Allocate the structure if it has not already been allocated by a
769
     subclass.  */
770
0
  if (entry == NULL)
771
0
    {
772
0
      entry = bfd_hash_allocate (table,
773
0
         sizeof (struct elf_s390_link_hash_entry));
774
0
      if (entry == NULL)
775
0
  return entry;
776
0
    }
777
778
  /* Call the allocation method of the superclass.  */
779
0
  entry = _bfd_elf_link_hash_newfunc (entry, table, string);
780
0
  if (entry != NULL)
781
0
    {
782
0
      struct elf_s390_link_hash_entry *eh;
783
784
0
      eh = (struct elf_s390_link_hash_entry *) entry;
785
0
      eh->gotplt_refcount = 0;
786
0
      eh->tls_type = GOT_UNKNOWN;
787
0
      eh->ifunc_resolver_address = 0;
788
0
      eh->ifunc_resolver_section = NULL;
789
0
    }
790
791
0
  return entry;
792
0
}
793
794
/* Create an s390 ELF linker hash table.  */
795
796
static struct bfd_link_hash_table *
797
elf_s390_link_hash_table_create (bfd *abfd)
798
0
{
799
0
  struct elf_s390_link_hash_table *ret;
800
0
  size_t amt = sizeof (struct elf_s390_link_hash_table);
801
802
0
  ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
803
0
  if (ret == NULL)
804
0
    return NULL;
805
806
0
  if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
807
0
              sizeof (struct elf_s390_link_hash_entry),
808
0
              S390_ELF_DATA))
809
0
    {
810
0
      free (ret);
811
0
      return NULL;
812
0
    }
813
814
0
  return &ret->elf.root;
815
0
}
816
817
/* Copy the extra info we tack onto an elf_link_hash_entry.  */
818
819
static void
820
elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
821
             struct elf_link_hash_entry *dir,
822
             struct elf_link_hash_entry *ind)
823
0
{
824
0
  struct elf_s390_link_hash_entry *edir, *eind;
825
826
0
  edir = (struct elf_s390_link_hash_entry *) dir;
827
0
  eind = (struct elf_s390_link_hash_entry *) ind;
828
829
0
  if (ind->root.type == bfd_link_hash_indirect
830
0
      && dir->got.refcount <= 0)
831
0
    {
832
0
      edir->tls_type = eind->tls_type;
833
0
      eind->tls_type = GOT_UNKNOWN;
834
0
    }
835
836
0
  if (ELIMINATE_COPY_RELOCS
837
0
      && ind->root.type != bfd_link_hash_indirect
838
0
      && dir->dynamic_adjusted)
839
0
    {
840
      /* If called to transfer flags for a weakdef during processing
841
   of elf_adjust_dynamic_symbol, don't copy non_got_ref.
842
   We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
843
0
      if (dir->versioned != versioned_hidden)
844
0
  dir->ref_dynamic |= ind->ref_dynamic;
845
0
      dir->ref_regular |= ind->ref_regular;
846
0
      dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
847
0
      dir->needs_plt |= ind->needs_plt;
848
0
    }
849
0
  else
850
0
    _bfd_elf_link_hash_copy_indirect (info, dir, ind);
851
0
}
852
853
static int
854
elf_s390_tls_transition (struct bfd_link_info *info,
855
       int r_type,
856
       int is_local)
857
0
{
858
0
  if (bfd_link_pic (info))
859
0
    return r_type;
860
861
0
  switch (r_type)
862
0
    {
863
0
    case R_390_TLS_GD32:
864
0
    case R_390_TLS_IE32:
865
0
      if (is_local)
866
0
  return R_390_TLS_LE32;
867
0
      return R_390_TLS_IE32;
868
0
    case R_390_TLS_GOTIE32:
869
0
      if (is_local)
870
0
  return R_390_TLS_LE32;
871
0
      return R_390_TLS_GOTIE32;
872
0
    case R_390_TLS_LDM32:
873
0
      return R_390_TLS_LE32;
874
0
    }
875
876
0
  return r_type;
877
0
}
878
879
/* Look through the relocs for a section during the first phase, and
880
   allocate space in the global offset table or procedure linkage
881
   table.  */
882
883
static bool
884
elf_s390_check_relocs (bfd *abfd,
885
           struct bfd_link_info *info,
886
           asection *sec,
887
           const Elf_Internal_Rela *relocs)
888
0
{
889
0
  struct elf_s390_link_hash_table *htab;
890
0
  Elf_Internal_Shdr *symtab_hdr;
891
0
  struct elf_link_hash_entry **sym_hashes;
892
0
  const Elf_Internal_Rela *rel;
893
0
  const Elf_Internal_Rela *rel_end;
894
0
  asection *sreloc;
895
0
  bfd_signed_vma *local_got_refcounts;
896
0
  int tls_type, old_tls_type;
897
0
  Elf_Internal_Sym *isym;
898
899
0
  if (bfd_link_relocatable (info))
900
0
    return true;
901
902
0
  BFD_ASSERT (is_s390_elf (abfd));
903
904
0
  htab = elf_s390_hash_table (info);
905
0
  symtab_hdr = &elf_symtab_hdr (abfd);
906
0
  sym_hashes = elf_sym_hashes (abfd);
907
0
  local_got_refcounts = elf_local_got_refcounts (abfd);
908
909
0
  sreloc = NULL;
910
911
0
  rel_end = relocs + sec->reloc_count;
912
0
  for (rel = relocs; rel < rel_end; rel++)
913
0
    {
914
0
      unsigned int r_type;
915
0
      unsigned int r_symndx;
916
0
      struct elf_link_hash_entry *h;
917
918
0
      r_symndx = ELF32_R_SYM (rel->r_info);
919
920
0
      if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
921
0
  {
922
    /* xgettext:c-format */
923
0
    _bfd_error_handler (_("%pB: bad symbol index: %d"),
924
0
            abfd, r_symndx);
925
0
    return false;
926
0
  }
927
928
0
      if (r_symndx < symtab_hdr->sh_info)
929
0
  {
930
    /* A local symbol.  */
931
0
    isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
932
0
          abfd, r_symndx);
933
0
    if (isym == NULL)
934
0
      return false;
935
936
0
    if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
937
0
      {
938
0
        struct plt_entry *plt;
939
940
0
        if (htab->elf.dynobj == NULL)
941
0
    htab->elf.dynobj = abfd;
942
943
0
        if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
944
0
    return false;
945
946
0
        if (local_got_refcounts == NULL)
947
0
    {
948
0
      if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
949
0
        return false;
950
0
      local_got_refcounts = elf_local_got_refcounts (abfd);
951
0
    }
952
0
        plt = elf_s390_local_plt (abfd);
953
0
        plt[r_symndx].plt.refcount++;
954
0
      }
955
0
    h = NULL;
956
0
  }
957
0
      else
958
0
  {
959
0
    h = sym_hashes[r_symndx - symtab_hdr->sh_info];
960
0
    while (h->root.type == bfd_link_hash_indirect
961
0
     || h->root.type == bfd_link_hash_warning)
962
0
      h = (struct elf_link_hash_entry *) h->root.u.i.link;
963
0
  }
964
965
      /* Create got section and local_got_refcounts array if they
966
   are needed.  */
967
0
      r_type = elf_s390_tls_transition (info,
968
0
          ELF32_R_TYPE (rel->r_info),
969
0
          h == NULL);
970
0
      switch (r_type)
971
0
  {
972
0
  case R_390_GOT12:
973
0
  case R_390_GOT16:
974
0
  case R_390_GOT20:
975
0
  case R_390_GOT32:
976
0
  case R_390_GOTENT:
977
0
  case R_390_GOTPLT12:
978
0
  case R_390_GOTPLT16:
979
0
  case R_390_GOTPLT20:
980
0
  case R_390_GOTPLT32:
981
0
  case R_390_GOTPLTENT:
982
0
  case R_390_TLS_GD32:
983
0
  case R_390_TLS_GOTIE12:
984
0
  case R_390_TLS_GOTIE20:
985
0
  case R_390_TLS_GOTIE32:
986
0
  case R_390_TLS_IEENT:
987
0
  case R_390_TLS_IE32:
988
0
  case R_390_TLS_LDM32:
989
0
    if (h == NULL
990
0
        && local_got_refcounts == NULL)
991
0
      {
992
0
        if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
993
0
    return false;
994
0
        local_got_refcounts = elf_local_got_refcounts (abfd);
995
0
      }
996
    /* Fall through.  */
997
0
  case R_390_GOTOFF16:
998
0
  case R_390_GOTOFF32:
999
0
  case R_390_GOTPC:
1000
0
  case R_390_GOTPCDBL:
1001
0
    if (htab->elf.sgot == NULL)
1002
0
      {
1003
0
        if (htab->elf.dynobj == NULL)
1004
0
    htab->elf.dynobj = abfd;
1005
0
        if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1006
0
    return false;
1007
0
      }
1008
0
  }
1009
1010
0
      if (h != NULL)
1011
0
  {
1012
0
    if (htab->elf.dynobj == NULL)
1013
0
      htab->elf.dynobj = abfd;
1014
0
    if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1015
0
      return false;
1016
1017
    /* Make sure an IFUNC symbol defined in a non-shared object
1018
       always gets a PLT slot.  */
1019
0
    if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1020
0
      {
1021
        /* The symbol is called by the dynamic loader in order
1022
     to resolve the relocation.  So it is in fact also
1023
     referenced.  */
1024
0
        h->ref_regular = 1;
1025
0
        h->needs_plt = 1;
1026
0
      }
1027
0
  }
1028
0
      switch (r_type)
1029
0
  {
1030
0
  case R_390_GOTPC:
1031
0
  case R_390_GOTPCDBL:
1032
    /* These relocs do not need a GOT slot.  They just load the
1033
       GOT pointer itself or address something else relative to
1034
       the GOT.  Since the GOT pointer has been set up above we
1035
       are done.  */
1036
0
    break;
1037
0
  case R_390_GOTOFF16:
1038
0
  case R_390_GOTOFF32:
1039
0
    if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1040
0
      break;
1041
    /* Fall through.  */
1042
1043
0
  case R_390_PLT12DBL:
1044
0
  case R_390_PLT16DBL:
1045
0
  case R_390_PLT24DBL:
1046
0
  case R_390_PLT32DBL:
1047
0
  case R_390_PLT32:
1048
0
  case R_390_PLTOFF16:
1049
0
  case R_390_PLTOFF32:
1050
    /* This symbol requires a procedure linkage table entry.  We
1051
       actually build the entry in adjust_dynamic_symbol,
1052
       because this might be a case of linking PIC code which is
1053
       never referenced by a dynamic object, in which case we
1054
       don't need to generate a procedure linkage table entry
1055
       after all.  */
1056
1057
    /* If this is a local symbol, we resolve it directly without
1058
       creating a procedure linkage table entry.  */
1059
0
    if (h != NULL)
1060
0
      {
1061
0
        h->needs_plt = 1;
1062
0
        h->plt.refcount += 1;
1063
0
      }
1064
0
    break;
1065
1066
0
  case R_390_GOTPLT12:
1067
0
  case R_390_GOTPLT16:
1068
0
  case R_390_GOTPLT20:
1069
0
  case R_390_GOTPLT32:
1070
0
  case R_390_GOTPLTENT:
1071
    /* This symbol requires either a procedure linkage table entry
1072
       or an entry in the local got. We actually build the entry
1073
       in adjust_dynamic_symbol because whether this is really a
1074
       global reference can change and with it the fact if we have
1075
       to create a plt entry or a local got entry. To be able to
1076
       make a once global symbol a local one we have to keep track
1077
       of the number of gotplt references that exist for this
1078
       symbol.  */
1079
0
    if (h != NULL)
1080
0
      {
1081
0
        ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1082
0
        h->needs_plt = 1;
1083
0
        h->plt.refcount += 1;
1084
0
      }
1085
0
    else
1086
0
      local_got_refcounts[r_symndx] += 1;
1087
0
    break;
1088
1089
0
  case R_390_TLS_LDM32:
1090
0
    htab->tls_ldm_got.refcount += 1;
1091
0
    break;
1092
1093
0
  case R_390_TLS_IE32:
1094
0
  case R_390_TLS_GOTIE12:
1095
0
  case R_390_TLS_GOTIE20:
1096
0
  case R_390_TLS_GOTIE32:
1097
0
  case R_390_TLS_IEENT:
1098
0
    if (bfd_link_pic (info))
1099
0
      info->flags |= DF_STATIC_TLS;
1100
    /* Fall through.  */
1101
1102
0
  case R_390_GOT12:
1103
0
  case R_390_GOT16:
1104
0
  case R_390_GOT20:
1105
0
  case R_390_GOT32:
1106
0
  case R_390_GOTENT:
1107
0
  case R_390_TLS_GD32:
1108
    /* This symbol requires a global offset table entry.  */
1109
0
    switch (r_type)
1110
0
      {
1111
0
      default:
1112
0
      case R_390_GOT12:
1113
0
      case R_390_GOT16:
1114
0
      case R_390_GOT20:
1115
0
      case R_390_GOT32:
1116
0
      case R_390_GOTENT:
1117
0
        tls_type = GOT_NORMAL;
1118
0
        break;
1119
0
      case R_390_TLS_GD32:
1120
0
        tls_type = GOT_TLS_GD;
1121
0
        break;
1122
0
      case R_390_TLS_IE32:
1123
0
      case R_390_TLS_GOTIE32:
1124
0
        tls_type = GOT_TLS_IE;
1125
0
        break;
1126
0
      case R_390_TLS_GOTIE12:
1127
0
      case R_390_TLS_GOTIE20:
1128
0
      case R_390_TLS_IEENT:
1129
0
        tls_type = GOT_TLS_IE_NLT;
1130
0
        break;
1131
0
      }
1132
1133
0
    if (h != NULL)
1134
0
      {
1135
0
        h->got.refcount += 1;
1136
0
        old_tls_type = elf_s390_hash_entry(h)->tls_type;
1137
0
      }
1138
0
    else
1139
0
      {
1140
0
        local_got_refcounts[r_symndx] += 1;
1141
0
        old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1142
0
      }
1143
    /* If a TLS symbol is accessed using IE at least once,
1144
       there is no point to use dynamic model for it.  */
1145
0
    if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1146
0
      {
1147
0
        if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1148
0
    {
1149
0
      _bfd_error_handler
1150
        /* xgettext:c-format */
1151
0
        (_("%pB: `%s' accessed both as normal and thread local symbol"),
1152
0
         abfd, h->root.root.string);
1153
0
      return false;
1154
0
    }
1155
0
        if (old_tls_type > tls_type)
1156
0
    tls_type = old_tls_type;
1157
0
      }
1158
1159
0
    if (old_tls_type != tls_type)
1160
0
      {
1161
0
        if (h != NULL)
1162
0
    elf_s390_hash_entry (h)->tls_type = tls_type;
1163
0
        else
1164
0
    elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1165
0
      }
1166
1167
0
    if (r_type != R_390_TLS_IE32)
1168
0
      break;
1169
    /* Fall through.  */
1170
1171
0
  case R_390_TLS_LE32:
1172
    /* For static linking and executables this reloc will be
1173
       calculated at linktime otherwise a TLS_TPOFF runtime
1174
       reloc will be generated.  */
1175
0
    if (r_type == R_390_TLS_LE32 && bfd_link_pie (info))
1176
0
      break;
1177
1178
0
    if (!bfd_link_pic (info))
1179
0
      break;
1180
0
    info->flags |= DF_STATIC_TLS;
1181
    /* Fall through.  */
1182
1183
0
  case R_390_8:
1184
0
  case R_390_16:
1185
0
  case R_390_32:
1186
0
  case R_390_PC16:
1187
0
  case R_390_PC12DBL:
1188
0
  case R_390_PC16DBL:
1189
0
  case R_390_PC24DBL:
1190
0
  case R_390_PC32DBL:
1191
0
  case R_390_PC32:
1192
0
    if (h != NULL && bfd_link_executable (info))
1193
0
      {
1194
        /* If this reloc is in a read-only section, we might
1195
     need a copy reloc.  We can't check reliably at this
1196
     stage whether the section is read-only, as input
1197
     sections have not yet been mapped to output sections.
1198
     Tentatively set the flag for now, and correct in
1199
     adjust_dynamic_symbol.  */
1200
0
        h->non_got_ref = 1;
1201
1202
0
        if (!bfd_link_pic (info))
1203
0
    {
1204
      /* We may need a .plt entry if the function this reloc
1205
         refers to is in a shared lib.  */
1206
0
      h->plt.refcount += 1;
1207
0
    }
1208
0
      }
1209
1210
    /* If we are creating a shared library, and this is a reloc
1211
       against a global symbol, or a non PC relative reloc
1212
       against a local symbol, then we need to copy the reloc
1213
       into the shared library.  However, if we are linking with
1214
       -Bsymbolic, we do not need to copy a reloc against a
1215
       global symbol which is defined in an object we are
1216
       including in the link (i.e., DEF_REGULAR is set).  At
1217
       this point we have not seen all the input files, so it is
1218
       possible that DEF_REGULAR is not set now but will be set
1219
       later (it is never cleared).  In case of a weak definition,
1220
       DEF_REGULAR may be cleared later by a strong definition in
1221
       a shared library. We account for that possibility below by
1222
       storing information in the relocs_copied field of the hash
1223
       table entry.  A similar situation occurs when creating
1224
       shared libraries and symbol visibility changes render the
1225
       symbol local.
1226
1227
       If on the other hand, we are creating an executable, we
1228
       may need to keep relocations for symbols satisfied by a
1229
       dynamic library if we manage to avoid copy relocs for the
1230
       symbol.  */
1231
0
    if ((bfd_link_pic (info)
1232
0
         && (sec->flags & SEC_ALLOC) != 0
1233
0
         && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1234
0
        && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL
1235
0
        && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1236
0
        && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL
1237
0
        && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1238
0
        && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1239
0
       || (h != NULL
1240
0
           && (! SYMBOLIC_BIND (info, h)
1241
0
         || h->root.type == bfd_link_hash_defweak
1242
0
         || !h->def_regular))))
1243
0
        || (ELIMINATE_COPY_RELOCS
1244
0
      && !bfd_link_pic (info)
1245
0
      && (sec->flags & SEC_ALLOC) != 0
1246
0
      && h != NULL
1247
0
      && (h->root.type == bfd_link_hash_defweak
1248
0
          || !h->def_regular)))
1249
0
      {
1250
0
        struct elf_dyn_relocs *p;
1251
0
        struct elf_dyn_relocs **head;
1252
1253
        /* We must copy these reloc types into the output file.
1254
     Create a reloc section in dynobj and make room for
1255
     this reloc.  */
1256
0
        if (sreloc == NULL)
1257
0
    {
1258
0
      if (htab->elf.dynobj == NULL)
1259
0
        htab->elf.dynobj = abfd;
1260
1261
0
      sreloc = _bfd_elf_make_dynamic_reloc_section
1262
0
        (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ true);
1263
1264
0
      if (sreloc == NULL)
1265
0
        return false;
1266
0
    }
1267
1268
        /* If this is a global symbol, we count the number of
1269
     relocations we need for this symbol.  */
1270
0
        if (h != NULL)
1271
0
    {
1272
0
      head = &h->dyn_relocs;
1273
0
    }
1274
0
        else
1275
0
    {
1276
      /* Track dynamic relocs needed for local syms too.
1277
         We really need local syms available to do this
1278
         easily.  Oh well.  */
1279
0
      asection *s;
1280
0
      void *vpp;
1281
1282
0
      isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1283
0
            abfd, r_symndx);
1284
0
      if (isym == NULL)
1285
0
        return false;
1286
1287
0
      s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1288
0
      if (s == NULL)
1289
0
        s = sec;
1290
1291
0
      vpp = &elf_section_data (s)->local_dynrel;
1292
0
      head = (struct elf_dyn_relocs **) vpp;
1293
0
    }
1294
1295
0
        p = *head;
1296
0
        if (p == NULL || p->sec != sec)
1297
0
    {
1298
0
      size_t amt = sizeof *p;
1299
1300
0
      p = ((struct elf_dyn_relocs *)
1301
0
           bfd_alloc (htab->elf.dynobj, amt));
1302
0
      if (p == NULL)
1303
0
        return false;
1304
0
      p->next = *head;
1305
0
      *head = p;
1306
0
      p->sec = sec;
1307
0
      p->count = 0;
1308
0
      p->pc_count = 0;
1309
0
    }
1310
1311
0
        p->count += 1;
1312
0
        if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1313
0
      || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL
1314
0
      || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1315
0
      || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL
1316
0
      || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1317
0
      || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1318
0
    p->pc_count += 1;
1319
0
      }
1320
0
    break;
1321
1322
    /* This relocation describes the C++ object vtable hierarchy.
1323
       Reconstruct it for later use during GC.  */
1324
0
  case R_390_GNU_VTINHERIT:
1325
0
    if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1326
0
      return false;
1327
0
    break;
1328
1329
    /* This relocation describes which C++ vtable entries are actually
1330
       used.  Record for later use during GC.  */
1331
0
  case R_390_GNU_VTENTRY:
1332
0
    if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1333
0
      return false;
1334
0
    break;
1335
1336
0
  default:
1337
0
    break;
1338
0
  }
1339
0
    }
1340
1341
0
  return true;
1342
0
}
1343
1344
/* Return the section that should be marked against GC for a given
1345
   relocation.  */
1346
1347
static asection *
1348
elf_s390_gc_mark_hook (asection *sec,
1349
           struct bfd_link_info *info,
1350
           Elf_Internal_Rela *rel,
1351
           struct elf_link_hash_entry *h,
1352
           Elf_Internal_Sym *sym)
1353
0
{
1354
0
  if (h != NULL)
1355
0
    switch (ELF32_R_TYPE (rel->r_info))
1356
0
      {
1357
0
      case R_390_GNU_VTINHERIT:
1358
0
      case R_390_GNU_VTENTRY:
1359
0
  return NULL;
1360
0
      }
1361
0
  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1362
1363
0
}
1364
1365
/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1366
   entry but we found we will not create any.  Called when we find we will
1367
   not have any PLT for this symbol, by for example
1368
   elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1369
   or elf_s390_late_size_sections if no dynamic sections will be
1370
   created (we're only linking static objects).  */
1371
1372
static void
1373
elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1374
0
{
1375
0
  if (h->elf.root.type == bfd_link_hash_warning)
1376
0
    h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1377
1378
0
  if (h->gotplt_refcount <= 0)
1379
0
    return;
1380
1381
  /* We simply add the number of gotplt references to the number
1382
   * of got references for this symbol.  */
1383
0
  h->elf.got.refcount += h->gotplt_refcount;
1384
0
  h->gotplt_refcount = -1;
1385
0
}
1386
1387
/* Adjust a symbol defined by a dynamic object and referenced by a
1388
   regular object.  The current definition is in some section of the
1389
   dynamic object, but we're not including those sections.  We have to
1390
   change the definition to something the rest of the link can
1391
   understand.  */
1392
1393
static bool
1394
elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1395
        struct elf_link_hash_entry *h)
1396
0
{
1397
0
  struct elf_s390_link_hash_table *htab;
1398
0
  asection *s, *srel;
1399
1400
  /* STT_GNU_IFUNC symbol must go through PLT. */
1401
0
  if (s390_is_ifunc_symbol_p (h))
1402
0
    {
1403
      /* All local STT_GNU_IFUNC references must be treated as local
1404
   calls via local PLT.  */
1405
0
      if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1406
0
  {
1407
0
    bfd_size_type pc_count = 0, count = 0;
1408
0
    struct elf_dyn_relocs **pp;
1409
0
    struct elf_dyn_relocs *p;
1410
1411
0
    for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1412
0
      {
1413
0
        pc_count += p->pc_count;
1414
0
        p->count -= p->pc_count;
1415
0
        p->pc_count = 0;
1416
0
        count += p->count;
1417
0
        if (p->count == 0)
1418
0
    *pp = p->next;
1419
0
        else
1420
0
    pp = &p->next;
1421
0
      }
1422
1423
0
    if (pc_count || count)
1424
0
      {
1425
0
        h->needs_plt = 1;
1426
0
        h->non_got_ref = 1;
1427
0
        if (h->plt.refcount <= 0)
1428
0
    h->plt.refcount = 1;
1429
0
        else
1430
0
    h->plt.refcount += 1;
1431
0
      }
1432
0
  }
1433
1434
0
      if (h->plt.refcount <= 0)
1435
0
  {
1436
0
    h->plt.offset = (bfd_vma) -1;
1437
0
    h->needs_plt = 0;
1438
0
  }
1439
0
      return true;
1440
0
    }
1441
1442
  /* If this is a function, put it in the procedure linkage table.  We
1443
     will fill in the contents of the procedure linkage table later
1444
     (although we could actually do it here).  */
1445
0
  if (h->type == STT_FUNC
1446
0
      || h->needs_plt)
1447
0
    {
1448
0
      if (h->plt.refcount <= 0
1449
0
    || SYMBOL_CALLS_LOCAL (info, h)
1450
0
    || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1451
0
  {
1452
    /* This case can occur if we saw a PLT32 reloc in an input
1453
       file, but the symbol was never referred to by a dynamic
1454
       object, or if all references were garbage collected.  In
1455
       such a case, we don't actually need to build a procedure
1456
       linkage table, and we can just do a PC32 reloc instead.  */
1457
0
    h->plt.offset = (bfd_vma) -1;
1458
0
    h->needs_plt = 0;
1459
0
    elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1460
0
  }
1461
1462
0
      return true;
1463
0
    }
1464
0
  else
1465
    /* It's possible that we incorrectly decided a .plt reloc was
1466
       needed for an R_390_PC32 reloc to a non-function sym in
1467
       check_relocs.  We can't decide accurately between function and
1468
       non-function syms in check-relocs;  Objects loaded later in
1469
       the link may change h->type.  So fix it now.  */
1470
0
    h->plt.offset = (bfd_vma) -1;
1471
1472
  /* If this is a weak symbol, and there is a real definition, the
1473
     processor independent code will have arranged for us to see the
1474
     real definition first, and we can just use the same value.  */
1475
0
  if (h->is_weakalias)
1476
0
    {
1477
0
      struct elf_link_hash_entry *def = weakdef (h);
1478
0
      BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1479
0
      h->root.u.def.section = def->root.u.def.section;
1480
0
      h->root.u.def.value = def->root.u.def.value;
1481
0
      if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1482
0
  h->non_got_ref = def->non_got_ref;
1483
0
      return true;
1484
0
    }
1485
1486
  /* This is a reference to a symbol defined by a dynamic object which
1487
     is not a function.  */
1488
1489
  /* If we are creating a shared library, we must presume that the
1490
     only references to the symbol are via the global offset table.
1491
     For such cases we need not do anything here; the relocations will
1492
     be handled correctly by relocate_section.  */
1493
0
  if (bfd_link_pic (info))
1494
0
    return true;
1495
1496
  /* If there are no references to this symbol that do not use the
1497
     GOT, we don't need to generate a copy reloc.  */
1498
0
  if (!h->non_got_ref)
1499
0
    return true;
1500
1501
  /* If -z nocopyreloc was given, we won't generate them either.  */
1502
0
  if (info->nocopyreloc)
1503
0
    {
1504
0
      h->non_got_ref = 0;
1505
0
      return true;
1506
0
    }
1507
1508
  /* If we don't find any dynamic relocs in read-only sections, then
1509
     we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1510
0
  if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h))
1511
0
    {
1512
0
      h->non_got_ref = 0;
1513
0
      return true;
1514
0
    }
1515
1516
  /* We must allocate the symbol in our .dynbss section, which will
1517
     become part of the .bss section of the executable.  There will be
1518
     an entry for this symbol in the .dynsym section.  The dynamic
1519
     object will contain position independent code, so all references
1520
     from the dynamic object to this symbol will go through the global
1521
     offset table.  The dynamic linker will use the .dynsym entry to
1522
     determine the address it must put in the global offset table, so
1523
     both the dynamic object and the regular object will refer to the
1524
     same memory location for the variable.  */
1525
1526
0
  htab = elf_s390_hash_table (info);
1527
1528
  /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1529
     copy the initial value out of the dynamic object and into the
1530
     runtime process image.  */
1531
0
  if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1532
0
    {
1533
0
      s = htab->elf.sdynrelro;
1534
0
      srel = htab->elf.sreldynrelro;
1535
0
    }
1536
0
  else
1537
0
    {
1538
0
      s = htab->elf.sdynbss;
1539
0
      srel = htab->elf.srelbss;
1540
0
    }
1541
0
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1542
0
    {
1543
0
      srel->size += sizeof (Elf32_External_Rela);
1544
0
      h->needs_copy = 1;
1545
0
    }
1546
1547
0
  return _bfd_elf_adjust_dynamic_copy (info, h, s);
1548
0
}
1549
1550
/* Allocate space in .plt, .got and associated reloc sections for
1551
   dynamic relocs.  */
1552
1553
static bool
1554
allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1555
0
{
1556
0
  struct bfd_link_info *info;
1557
0
  struct elf_s390_link_hash_table *htab;
1558
0
  struct elf_dyn_relocs *p;
1559
1560
0
  if (h->root.type == bfd_link_hash_indirect)
1561
0
    return true;
1562
1563
0
  info = (struct bfd_link_info *) inf;
1564
0
  htab = elf_s390_hash_table (info);
1565
1566
  /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1567
     here if it is defined and referenced in a non-shared object.  */
1568
0
  if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1569
0
    return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1570
0
  else if (htab->elf.dynamic_sections_created
1571
0
     && h->plt.refcount > 0)
1572
0
    {
1573
      /* Make sure this symbol is output as a dynamic symbol.
1574
   Undefined weak syms won't yet be marked as dynamic.  */
1575
0
      if (h->dynindx == -1
1576
0
    && !h->forced_local)
1577
0
  {
1578
0
    if (! bfd_elf_link_record_dynamic_symbol (info, h))
1579
0
      return false;
1580
0
  }
1581
1582
0
      if (bfd_link_pic (info)
1583
0
    || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1584
0
  {
1585
0
    asection *s = htab->elf.splt;
1586
1587
    /* If this is the first .plt entry, make room for the special
1588
       first entry.  */
1589
0
    if (s->size == 0)
1590
0
      s->size += PLT_FIRST_ENTRY_SIZE;
1591
1592
0
    h->plt.offset = s->size;
1593
1594
    /* If this symbol is not defined in a regular file, and we are
1595
       not generating a shared library, then set the symbol to this
1596
       location in the .plt.  This is required to make function
1597
       pointers compare as equal between the normal executable and
1598
       the shared library.  */
1599
0
    if (! bfd_link_pic (info)
1600
0
        && !h->def_regular)
1601
0
      {
1602
0
        h->root.u.def.section = s;
1603
0
        h->root.u.def.value = h->plt.offset;
1604
0
      }
1605
1606
    /* Make room for this entry.  */
1607
0
    s->size += PLT_ENTRY_SIZE;
1608
1609
    /* We also need to make an entry in the .got.plt section, which
1610
       will be placed in the .got section by the linker script.  */
1611
0
    htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1612
1613
    /* We also need to make an entry in the .rela.plt section.  */
1614
0
    htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1615
0
  }
1616
0
      else
1617
0
  {
1618
0
    h->plt.offset = (bfd_vma) -1;
1619
0
    h->needs_plt = 0;
1620
0
    elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1621
0
  }
1622
0
    }
1623
0
  else
1624
0
    {
1625
0
      h->plt.offset = (bfd_vma) -1;
1626
0
      h->needs_plt = 0;
1627
0
      elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1628
0
    }
1629
1630
  /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1631
     the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1632
     to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1633
     we can save the dynamic TLS relocation.  */
1634
0
  if (h->got.refcount > 0
1635
0
      && !bfd_link_pic (info)
1636
0
      && h->dynindx == -1
1637
0
      && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1638
0
    {
1639
0
      if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1640
  /* For the GOTIE access without a literal pool entry the offset has
1641
     to be stored somewhere. The immediate value in the instruction
1642
     is not bit enough so the value is stored in the got.  */
1643
0
  {
1644
0
    h->got.offset = htab->elf.sgot->size;
1645
0
    htab->elf.sgot->size += GOT_ENTRY_SIZE;
1646
0
  }
1647
0
      else
1648
0
  h->got.offset = (bfd_vma) -1;
1649
0
    }
1650
0
  else if (h->got.refcount > 0)
1651
0
    {
1652
0
      asection *s;
1653
0
      bool dyn;
1654
0
      int tls_type = elf_s390_hash_entry(h)->tls_type;
1655
1656
      /* Make sure this symbol is output as a dynamic symbol.
1657
   Undefined weak syms won't yet be marked as dynamic.  */
1658
0
      if (h->dynindx == -1
1659
0
    && !h->forced_local)
1660
0
  {
1661
0
    if (! bfd_elf_link_record_dynamic_symbol (info, h))
1662
0
      return false;
1663
0
  }
1664
1665
0
      s = htab->elf.sgot;
1666
0
      h->got.offset = s->size;
1667
0
      s->size += GOT_ENTRY_SIZE;
1668
      /* R_390_TLS_GD32 needs 2 consecutive GOT slots.  */
1669
0
      if (tls_type == GOT_TLS_GD)
1670
0
  s->size += GOT_ENTRY_SIZE;
1671
0
      dyn = htab->elf.dynamic_sections_created;
1672
      /* R_390_TLS_IE32 needs one dynamic relocation,
1673
   R_390_TLS_GD32 needs one if local symbol and two if global.  */
1674
0
      if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1675
0
    || tls_type >= GOT_TLS_IE)
1676
0
  htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1677
0
      else if (tls_type == GOT_TLS_GD)
1678
0
  htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1679
0
      else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1680
0
         && (bfd_link_pic (info)
1681
0
       || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1682
0
  htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1683
0
    }
1684
0
  else
1685
0
    h->got.offset = (bfd_vma) -1;
1686
1687
0
  if (h->dyn_relocs == NULL)
1688
0
    return true;
1689
1690
  /* In the shared -Bsymbolic case, discard space allocated for
1691
     dynamic pc-relative relocs against symbols which turn out to be
1692
     defined in regular objects.  For the normal shared case, discard
1693
     space for pc-relative relocs that have become local due to symbol
1694
     visibility changes.  */
1695
1696
0
  if (bfd_link_pic (info))
1697
0
    {
1698
0
      if (SYMBOL_CALLS_LOCAL (info, h))
1699
0
  {
1700
0
    struct elf_dyn_relocs **pp;
1701
1702
0
    for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
1703
0
      {
1704
0
        p->count -= p->pc_count;
1705
0
        p->pc_count = 0;
1706
0
        if (p->count == 0)
1707
0
    *pp = p->next;
1708
0
        else
1709
0
    pp = &p->next;
1710
0
      }
1711
0
  }
1712
1713
      /* Also discard relocs on undefined weak syms with non-default
1714
   visibility.  */
1715
0
      if (h->dyn_relocs != NULL
1716
0
    && h->root.type == bfd_link_hash_undefweak)
1717
0
  {
1718
0
    if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1719
0
        || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1720
0
      h->dyn_relocs = NULL;
1721
1722
    /* Make sure undefined weak symbols are output as a dynamic
1723
       symbol in PIEs.  */
1724
0
    else if (h->dynindx == -1
1725
0
       && !h->forced_local)
1726
0
      {
1727
0
        if (! bfd_elf_link_record_dynamic_symbol (info, h))
1728
0
    return false;
1729
0
      }
1730
0
  }
1731
0
    }
1732
0
  else if (ELIMINATE_COPY_RELOCS)
1733
0
    {
1734
      /* For the non-shared case, discard space for relocs against
1735
   symbols which turn out to need copy relocs or are not
1736
   dynamic.  */
1737
1738
0
      if (!h->non_got_ref
1739
0
    && ((h->def_dynamic
1740
0
         && !h->def_regular)
1741
0
        || (htab->elf.dynamic_sections_created
1742
0
      && (h->root.type == bfd_link_hash_undefweak
1743
0
          || h->root.type == bfd_link_hash_undefined))))
1744
0
  {
1745
    /* Make sure this symbol is output as a dynamic symbol.
1746
       Undefined weak syms won't yet be marked as dynamic.  */
1747
0
    if (h->dynindx == -1
1748
0
        && !h->forced_local)
1749
0
      {
1750
0
        if (! bfd_elf_link_record_dynamic_symbol (info, h))
1751
0
    return false;
1752
0
      }
1753
1754
    /* If that succeeded, we know we'll be keeping all the
1755
       relocs.  */
1756
0
    if (h->dynindx != -1)
1757
0
      goto keep;
1758
0
  }
1759
1760
0
      h->dyn_relocs = NULL;
1761
1762
0
    keep: ;
1763
0
    }
1764
1765
  /* Finally, allocate space.  */
1766
0
  for (p = h->dyn_relocs; p != NULL; p = p->next)
1767
0
    {
1768
0
      asection *sreloc = elf_section_data (p->sec)->sreloc;
1769
1770
0
      sreloc->size += p->count * sizeof (Elf32_External_Rela);
1771
0
    }
1772
1773
0
  return true;
1774
0
}
1775
1776
/* Set the sizes of the dynamic sections.  */
1777
1778
static bool
1779
elf_s390_late_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1780
           struct bfd_link_info *info)
1781
0
{
1782
0
  struct elf_s390_link_hash_table *htab;
1783
0
  bfd *dynobj;
1784
0
  asection *s;
1785
0
  bool relocs;
1786
0
  bfd *ibfd;
1787
1788
0
  htab = elf_s390_hash_table (info);
1789
0
  dynobj = htab->elf.dynobj;
1790
0
  if (dynobj == NULL)
1791
0
    return true;
1792
1793
0
  if (htab->elf.dynamic_sections_created)
1794
0
    {
1795
      /* Set the contents of the .interp section to the interpreter.  */
1796
0
      if (bfd_link_executable (info) && !info->nointerp)
1797
0
  {
1798
0
    s = bfd_get_linker_section (dynobj, ".interp");
1799
0
    if (s == NULL)
1800
0
      abort ();
1801
0
    s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1802
0
    s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1803
0
  }
1804
0
    }
1805
1806
  /* Set up .got offsets for local syms, and space for local dynamic
1807
     relocs.  */
1808
0
  for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1809
0
    {
1810
0
      bfd_signed_vma *local_got;
1811
0
      bfd_signed_vma *end_local_got;
1812
0
      char *local_tls_type;
1813
0
      bfd_size_type locsymcount;
1814
0
      Elf_Internal_Shdr *symtab_hdr;
1815
0
      asection *srela;
1816
0
      struct plt_entry *local_plt;
1817
0
      unsigned int i;
1818
1819
0
      if (! is_s390_elf (ibfd))
1820
0
  continue;
1821
1822
0
      for (s = ibfd->sections; s != NULL; s = s->next)
1823
0
  {
1824
0
    struct elf_dyn_relocs *p;
1825
1826
0
    for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1827
0
      {
1828
0
        if (!bfd_is_abs_section (p->sec)
1829
0
      && bfd_is_abs_section (p->sec->output_section))
1830
0
    {
1831
      /* Input section has been discarded, either because
1832
         it is a copy of a linkonce section or due to
1833
         linker script /DISCARD/, so we'll be discarding
1834
         the relocs too.  */
1835
0
    }
1836
0
        else if (p->count != 0)
1837
0
    {
1838
0
      srela = elf_section_data (p->sec)->sreloc;
1839
0
      srela->size += p->count * sizeof (Elf32_External_Rela);
1840
0
      if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1841
0
        info->flags |= DF_TEXTREL;
1842
0
    }
1843
0
      }
1844
0
  }
1845
1846
0
      local_got = elf_local_got_refcounts (ibfd);
1847
0
      if (!local_got)
1848
0
  continue;
1849
1850
0
      symtab_hdr = &elf_symtab_hdr (ibfd);
1851
0
      locsymcount = symtab_hdr->sh_info;
1852
0
      end_local_got = local_got + locsymcount;
1853
0
      local_tls_type = elf_s390_local_got_tls_type (ibfd);
1854
0
      s = htab->elf.sgot;
1855
0
      srela = htab->elf.srelgot;
1856
0
      for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1857
0
  {
1858
0
    if (*local_got > 0)
1859
0
      {
1860
0
        *local_got = s->size;
1861
0
        s->size += GOT_ENTRY_SIZE;
1862
0
        if (*local_tls_type == GOT_TLS_GD)
1863
0
    s->size += GOT_ENTRY_SIZE;
1864
0
        if (bfd_link_pic (info))
1865
0
    srela->size += sizeof (Elf32_External_Rela);
1866
0
      }
1867
0
    else
1868
0
      *local_got = (bfd_vma) -1;
1869
0
  }
1870
0
      local_plt = elf_s390_local_plt (ibfd);
1871
0
      for (i = 0; i < symtab_hdr->sh_info; i++)
1872
0
  {
1873
0
    if (local_plt[i].plt.refcount > 0)
1874
0
      {
1875
0
        local_plt[i].plt.offset = htab->elf.iplt->size;
1876
0
        htab->elf.iplt->size += PLT_ENTRY_SIZE;
1877
0
        htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1878
0
        htab->elf.irelplt->size += RELA_ENTRY_SIZE;
1879
0
      }
1880
0
    else
1881
0
      local_plt[i].plt.offset = (bfd_vma) -1;
1882
0
  }
1883
0
    }
1884
1885
0
  if (htab->tls_ldm_got.refcount > 0)
1886
0
    {
1887
      /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
1888
   relocs.  */
1889
0
      htab->tls_ldm_got.offset = htab->elf.sgot->size;
1890
0
      htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1891
0
      htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1892
0
    }
1893
0
  else
1894
0
    htab->tls_ldm_got.offset = -1;
1895
1896
  /* Allocate global sym .plt and .got entries, and space for global
1897
     sym dynamic relocs.  */
1898
0
  elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1899
1900
  /* We now have determined the sizes of the various dynamic sections.
1901
     Allocate memory for them.  */
1902
0
  relocs = false;
1903
0
  for (s = dynobj->sections; s != NULL; s = s->next)
1904
0
    {
1905
0
      if ((s->flags & SEC_LINKER_CREATED) == 0)
1906
0
  continue;
1907
1908
0
      if (s == htab->elf.splt
1909
0
    || s == htab->elf.sgot
1910
0
    || s == htab->elf.sgotplt
1911
0
    || s == htab->elf.sdynbss
1912
0
    || s == htab->elf.sdynrelro
1913
0
    || s == htab->elf.iplt
1914
0
    || s == htab->elf.igotplt
1915
0
    || s == htab->irelifunc)
1916
0
  {
1917
    /* Strip this section if we don't need it; see the
1918
       comment below.  */
1919
0
  }
1920
0
      else if (startswith (bfd_section_name (s), ".rela"))
1921
0
  {
1922
0
    if (s->size != 0)
1923
0
      relocs = true;
1924
1925
    /* We use the reloc_count field as a counter if we need
1926
       to copy relocs into the output file.  */
1927
0
    s->reloc_count = 0;
1928
0
  }
1929
0
      else
1930
0
  {
1931
    /* It's not one of our sections, so don't allocate space.  */
1932
0
    continue;
1933
0
  }
1934
1935
0
      if (s->size == 0)
1936
0
  {
1937
    /* If we don't need this section, strip it from the
1938
       output file.  This is to handle .rela.bss and
1939
       .rela.plt.  We must create it in
1940
       create_dynamic_sections, because it must be created
1941
       before the linker maps input sections to output
1942
       sections.  The linker does that before
1943
       adjust_dynamic_symbol is called, and it is that
1944
       function which decides whether anything needs to go
1945
       into these sections.  */
1946
1947
0
    s->flags |= SEC_EXCLUDE;
1948
0
    continue;
1949
0
  }
1950
1951
0
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
1952
0
  continue;
1953
1954
      /* Allocate memory for the section contents.  We use bfd_zalloc
1955
   here in case unused entries are not reclaimed before the
1956
   section's contents are written out.  This should not happen,
1957
   but this way if it does, we get a R_390_NONE reloc instead
1958
   of garbage.  */
1959
0
      s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1960
0
      if (s->contents == NULL)
1961
0
  return false;
1962
0
    }
1963
1964
0
  return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
1965
0
}
1966
1967
/* Return the base VMA address which should be subtracted from real addresses
1968
   when resolving @dtpoff relocation.
1969
   This is PT_TLS segment p_vaddr.  */
1970
1971
static bfd_vma
1972
dtpoff_base (struct bfd_link_info *info)
1973
0
{
1974
  /* If tls_sec is NULL, we should have signalled an error already.  */
1975
0
  if (elf_hash_table (info)->tls_sec == NULL)
1976
0
    return 0;
1977
0
  return elf_hash_table (info)->tls_sec->vma;
1978
0
}
1979
1980
/* Return the relocation value for @tpoff relocation
1981
   if STT_TLS virtual address is ADDRESS.  */
1982
1983
static bfd_vma
1984
tpoff (struct bfd_link_info *info, bfd_vma address)
1985
0
{
1986
0
  struct elf_link_hash_table *htab = elf_hash_table (info);
1987
1988
  /* If tls_sec is NULL, we should have signalled an error already.  */
1989
0
  if (htab->tls_sec == NULL)
1990
0
    return 0;
1991
0
  return htab->tls_size + htab->tls_sec->vma - address;
1992
0
}
1993
1994
/* Complain if TLS instruction relocation is against an invalid
1995
   instruction.  */
1996
1997
static void
1998
invalid_tls_insn (bfd *input_bfd,
1999
      asection *input_section,
2000
      Elf_Internal_Rela *rel)
2001
0
{
2002
0
  reloc_howto_type *howto;
2003
2004
0
  howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2005
0
  _bfd_error_handler
2006
    /* xgettext:c-format */
2007
0
    (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2008
0
     input_bfd,
2009
0
     input_section,
2010
0
     (uint64_t) rel->r_offset,
2011
0
     howto->name);
2012
0
  bfd_set_error (bfd_error_bad_value);
2013
0
}
2014
2015
/* Relocate a 390 ELF section.  */
2016
2017
static int
2018
elf_s390_relocate_section (bfd *output_bfd,
2019
         struct bfd_link_info *info,
2020
         bfd *input_bfd,
2021
         asection *input_section,
2022
         bfd_byte *contents,
2023
         Elf_Internal_Rela *relocs,
2024
         Elf_Internal_Sym *local_syms,
2025
         asection **local_sections)
2026
0
{
2027
0
  struct elf_s390_link_hash_table *htab;
2028
0
  Elf_Internal_Shdr *symtab_hdr;
2029
0
  struct elf_link_hash_entry **sym_hashes;
2030
0
  bfd_vma *local_got_offsets;
2031
0
  Elf_Internal_Rela *rel;
2032
0
  Elf_Internal_Rela *relend;
2033
2034
0
  if (!is_s390_elf (input_bfd))
2035
0
    {
2036
0
      bfd_set_error (bfd_error_wrong_format);
2037
0
      return false;
2038
0
    }
2039
2040
0
  htab = elf_s390_hash_table (info);
2041
0
  symtab_hdr = &elf_symtab_hdr (input_bfd);
2042
0
  sym_hashes = elf_sym_hashes (input_bfd);
2043
0
  local_got_offsets = elf_local_got_offsets (input_bfd);
2044
2045
0
  rel = relocs;
2046
0
  relend = relocs + input_section->reloc_count;
2047
0
  for (; rel < relend; rel++)
2048
0
    {
2049
0
      unsigned int r_type;
2050
0
      reloc_howto_type *howto;
2051
0
      unsigned long r_symndx;
2052
0
      struct elf_link_hash_entry *h;
2053
0
      Elf_Internal_Sym *sym;
2054
0
      asection *sec;
2055
0
      bfd_vma off;
2056
0
      bfd_vma relocation;
2057
0
      bool unresolved_reloc;
2058
0
      bfd_reloc_status_type r;
2059
0
      int tls_type;
2060
0
      asection *base_got = htab->elf.sgot;
2061
0
      bool resolved_to_zero;
2062
2063
0
      r_type = ELF32_R_TYPE (rel->r_info);
2064
0
      if (r_type == (int) R_390_GNU_VTINHERIT
2065
0
    || r_type == (int) R_390_GNU_VTENTRY)
2066
0
  continue;
2067
0
      if (r_type >= (int) R_390_max)
2068
0
  {
2069
0
    bfd_set_error (bfd_error_bad_value);
2070
0
    return false;
2071
0
  }
2072
2073
0
      howto = elf_howto_table + r_type;
2074
0
      r_symndx = ELF32_R_SYM (rel->r_info);
2075
2076
0
      h = NULL;
2077
0
      sym = NULL;
2078
0
      sec = NULL;
2079
0
      unresolved_reloc = false;
2080
0
      if (r_symndx < symtab_hdr->sh_info)
2081
0
  {
2082
0
    sym = local_syms + r_symndx;
2083
0
    sec = local_sections[r_symndx];
2084
0
    if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2085
0
      {
2086
0
        struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2087
0
        if (local_plt == NULL)
2088
0
    return false;
2089
2090
        /* Address of the PLT slot.  */
2091
0
        relocation = (htab->elf.iplt->output_section->vma
2092
0
          + htab->elf.iplt->output_offset
2093
0
          + local_plt[r_symndx].plt.offset);
2094
2095
0
        switch (r_type)
2096
0
    {
2097
0
    case R_390_PLTOFF16:
2098
0
    case R_390_PLTOFF32:
2099
0
      relocation -= htab->elf.sgot->output_section->vma;
2100
0
      break;
2101
0
    case R_390_GOTPLT12:
2102
0
    case R_390_GOTPLT16:
2103
0
    case R_390_GOTPLT20:
2104
0
    case R_390_GOTPLT32:
2105
0
    case R_390_GOTPLTENT:
2106
0
    case R_390_GOT12:
2107
0
    case R_390_GOT16:
2108
0
    case R_390_GOT20:
2109
0
    case R_390_GOT32:
2110
0
    case R_390_GOTENT:
2111
0
      {
2112
        /* Write the PLT slot address into the GOT slot.  */
2113
0
        bfd_put_32 (output_bfd, relocation,
2114
0
        htab->elf.sgot->contents +
2115
0
        local_got_offsets[r_symndx]);
2116
0
        relocation = (local_got_offsets[r_symndx] +
2117
0
          htab->elf.sgot->output_offset);
2118
2119
0
        if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2120
0
          relocation += htab->elf.sgot->output_section->vma;
2121
0
        break;
2122
0
      }
2123
0
    default:
2124
0
      break;
2125
0
    }
2126
        /* The output section is needed later in
2127
     finish_dynamic_section when creating the dynamic
2128
     relocation.  */
2129
0
        local_plt[r_symndx].sec = sec;
2130
0
        goto do_relocation;
2131
0
      }
2132
0
    else
2133
0
      relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2134
0
  }
2135
0
      else
2136
0
  {
2137
0
    bool warned ATTRIBUTE_UNUSED;
2138
0
    bool ignored ATTRIBUTE_UNUSED;
2139
2140
0
    RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2141
0
           r_symndx, symtab_hdr, sym_hashes,
2142
0
           h, sec, relocation,
2143
0
           unresolved_reloc, warned, ignored);
2144
0
  }
2145
2146
0
      if (sec != NULL && discarded_section (sec))
2147
0
  RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2148
0
           rel, 1, relend, howto, 0, contents);
2149
2150
0
      if (bfd_link_relocatable (info))
2151
0
  continue;
2152
2153
0
      resolved_to_zero = (h != NULL
2154
0
        && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2155
2156
0
      switch (r_type)
2157
0
  {
2158
0
  case R_390_GOTPLT12:
2159
0
  case R_390_GOTPLT16:
2160
0
  case R_390_GOTPLT20:
2161
0
  case R_390_GOTPLT32:
2162
0
  case R_390_GOTPLTENT:
2163
    /* There are three cases for a GOTPLT relocation. 1) The
2164
       relocation is against the jump slot entry of a plt that
2165
       will get emitted to the output file. 2) The relocation
2166
       is against the jump slot of a plt entry that has been
2167
       removed. elf_s390_adjust_gotplt has created a GOT entry
2168
       as replacement. 3) The relocation is against a local symbol.
2169
       Cases 2) and 3) are the same as the GOT relocation code
2170
       so we just have to test for case 1 and fall through for
2171
       the other two.  */
2172
0
    if (h != NULL && h->plt.offset != (bfd_vma) -1)
2173
0
      {
2174
0
        bfd_vma plt_index;
2175
2176
0
        if (s390_is_ifunc_symbol_p (h))
2177
0
    {
2178
0
      plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2179
0
      relocation = (plt_index * GOT_ENTRY_SIZE +
2180
0
        htab->elf.igotplt->output_offset);
2181
0
      if (r_type == R_390_GOTPLTENT)
2182
0
        relocation += htab->elf.igotplt->output_section->vma;
2183
0
    }
2184
0
        else
2185
0
    {
2186
      /* Calc. index no.
2187
         Current offset - size first entry / entry size.  */
2188
0
      plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2189
0
        PLT_ENTRY_SIZE;
2190
2191
      /* Offset in GOT is PLT index plus GOT headers(3)
2192
         times 4, addr & GOT addr.  */
2193
0
      relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2194
0
      if (r_type == R_390_GOTPLTENT)
2195
0
        relocation += htab->elf.sgot->output_section->vma;
2196
0
    }
2197
0
        unresolved_reloc = false;
2198
2199
0
      }
2200
    /* Fall through.  */
2201
2202
0
  case R_390_GOT12:
2203
0
  case R_390_GOT16:
2204
0
  case R_390_GOT20:
2205
0
  case R_390_GOT32:
2206
0
  case R_390_GOTENT:
2207
    /* Relocation is to the entry for this symbol in the global
2208
       offset table.  */
2209
0
    if (base_got == NULL)
2210
0
      abort ();
2211
2212
0
    if (h != NULL)
2213
0
      {
2214
0
        bool dyn;
2215
2216
0
        off = h->got.offset;
2217
0
        dyn = htab->elf.dynamic_sections_created;
2218
2219
0
        if (s390_is_ifunc_symbol_p (h))
2220
0
    {
2221
0
      BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2222
0
      if (off == (bfd_vma)-1)
2223
0
        {
2224
          /* No explicit GOT usage so redirect to the
2225
       got.iplt slot.  */
2226
0
          base_got = htab->elf.igotplt;
2227
0
          off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2228
0
        }
2229
0
      else
2230
0
        {
2231
          /* Explicit GOT slots must contain the address
2232
       of the PLT slot. This will be handled in
2233
       finish_dynamic_symbol.  */
2234
0
        }
2235
0
    }
2236
0
        else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2237
0
                bfd_link_pic (info),
2238
0
                h)
2239
0
           || (bfd_link_pic (info)
2240
0
         && SYMBOL_REFERENCES_LOCAL (info, h))
2241
0
           || resolved_to_zero)
2242
0
    {
2243
      /* This is actually a static link, or it is a
2244
         -Bsymbolic link and the symbol is defined
2245
         locally, or the symbol was forced to be local
2246
         because of a version file.  We must initialize
2247
         this entry in the global offset table.  Since the
2248
         offset must always be a multiple of 2, we use the
2249
         least significant bit to record whether we have
2250
         initialized it already.
2251
2252
         When doing a dynamic link, we create a .rel.got
2253
         relocation entry to initialize the value.  This
2254
         is done in the finish_dynamic_symbol routine.  */
2255
0
      if ((off & 1) != 0)
2256
0
        off &= ~1;
2257
0
      else
2258
0
        {
2259
0
          bfd_put_32 (output_bfd, relocation,
2260
0
          base_got->contents + off);
2261
0
          h->got.offset |= 1;
2262
0
        }
2263
2264
0
      if ((h->def_regular
2265
0
           && bfd_link_pic (info)
2266
0
           && SYMBOL_REFERENCES_LOCAL (info, h))
2267
          /* lrl rx,sym@GOTENT -> larl rx, sym */
2268
0
          && ((r_type == R_390_GOTENT
2269
0
         && (bfd_get_16 (input_bfd,
2270
0
             contents + rel->r_offset - 2)
2271
0
             & 0xff0f) == 0xc40d)
2272
        /* ly rx, sym@GOT(r12) -> larl rx, sym */
2273
0
        || (r_type == R_390_GOT20
2274
0
            && (bfd_get_32 (input_bfd,
2275
0
                contents + rel->r_offset - 2)
2276
0
          & 0xff00f000) == 0xe300c000
2277
0
            && bfd_get_8 (input_bfd,
2278
0
              contents + rel->r_offset + 3) == 0x58)))
2279
0
        {
2280
0
          unsigned short new_insn =
2281
0
      (0xc000 | (bfd_get_8 (input_bfd,
2282
0
                contents + rel->r_offset - 1) & 0xf0));
2283
0
          bfd_put_16 (output_bfd, new_insn,
2284
0
          contents + rel->r_offset - 2);
2285
0
          r_type = R_390_PC32DBL;
2286
0
          rel->r_addend = 2;
2287
0
          howto = elf_howto_table + r_type;
2288
0
          relocation = h->root.u.def.value
2289
0
      + h->root.u.def.section->output_section->vma
2290
0
      + h->root.u.def.section->output_offset;
2291
0
          goto do_relocation;
2292
0
        }
2293
0
    }
2294
0
        else
2295
0
    unresolved_reloc = false;
2296
0
      }
2297
0
    else
2298
0
      {
2299
0
        if (local_got_offsets == NULL)
2300
0
    abort ();
2301
2302
0
        off = local_got_offsets[r_symndx];
2303
2304
        /* The offset must always be a multiple of 4.  We use
2305
     the least significant bit to record whether we have
2306
     already generated the necessary reloc.  */
2307
0
        if ((off & 1) != 0)
2308
0
    off &= ~1;
2309
0
        else
2310
0
    {
2311
0
      bfd_put_32 (output_bfd, relocation,
2312
0
            htab->elf.sgot->contents + off);
2313
2314
0
      if (bfd_link_pic (info))
2315
0
        {
2316
0
          asection *srelgot;
2317
0
          Elf_Internal_Rela outrel;
2318
0
          bfd_byte *loc;
2319
2320
0
          srelgot = htab->elf.srelgot;
2321
0
          if (srelgot == NULL)
2322
0
      abort ();
2323
2324
0
          outrel.r_offset = (htab->elf.sgot->output_section->vma
2325
0
           + htab->elf.sgot->output_offset
2326
0
           + off);
2327
0
          outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2328
0
          outrel.r_addend = relocation;
2329
0
          loc = srelgot->contents;
2330
0
          loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2331
0
          bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2332
0
        }
2333
2334
0
      local_got_offsets[r_symndx] |= 1;
2335
0
    }
2336
0
      }
2337
2338
0
    if (off >= (bfd_vma) -2)
2339
0
      abort ();
2340
2341
0
    relocation = base_got->output_offset + off;
2342
2343
    /* For @GOTENT the relocation is against the offset between
2344
       the instruction and the symbols entry in the GOT and not
2345
       between the start of the GOT and the symbols entry. We
2346
       add the vma of the GOT to get the correct value.  */
2347
0
    if (   r_type == R_390_GOTENT
2348
0
        || r_type == R_390_GOTPLTENT)
2349
0
      relocation += base_got->output_section->vma;
2350
2351
0
    break;
2352
2353
0
  case R_390_GOTOFF16:
2354
0
  case R_390_GOTOFF32:
2355
    /* Relocation is relative to the start of the global offset
2356
       table.  */
2357
2358
0
    if (h != NULL
2359
0
        && s390_is_ifunc_symbol_p (h)
2360
0
        && h->def_regular
2361
0
        && !bfd_link_executable (info))
2362
0
      {
2363
0
        relocation = (htab->elf.iplt->output_section->vma
2364
0
          + htab->elf.iplt->output_offset
2365
0
          + h->plt.offset
2366
0
          - htab->elf.sgot->output_section->vma);
2367
0
        goto do_relocation;
2368
0
      }
2369
2370
    /* Note that sgot->output_offset is not involved in this
2371
       calculation.  We always want the start of .got.  If we
2372
       defined _GLOBAL_OFFSET_TABLE in a different way, as is
2373
       permitted by the ABI, we might have to change this
2374
       calculation.  */
2375
0
    relocation -= htab->elf.sgot->output_section->vma;
2376
0
    break;
2377
2378
0
  case R_390_GOTPC:
2379
0
  case R_390_GOTPCDBL:
2380
    /* Use global offset table as symbol value.  */
2381
0
    relocation = htab->elf.sgot->output_section->vma;
2382
0
    unresolved_reloc = false;
2383
0
    break;
2384
2385
0
  case R_390_PLT12DBL:
2386
0
  case R_390_PLT16DBL:
2387
0
  case R_390_PLT24DBL:
2388
0
  case R_390_PLT32DBL:
2389
0
  case R_390_PLT32:
2390
    /* Relocation is to the entry for this symbol in the
2391
       procedure linkage table.  */
2392
2393
    /* Resolve a PLT32 reloc against a local symbol directly,
2394
       without using the procedure linkage table.  */
2395
0
    if (h == NULL)
2396
0
      break;
2397
2398
0
    if (h->plt.offset == (bfd_vma) -1
2399
0
        || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2400
0
      {
2401
        /* We didn't make a PLT entry for this symbol.  This
2402
     happens when statically linking PIC code, or when
2403
     using -Bsymbolic.  */
2404
0
        break;
2405
0
      }
2406
2407
0
    if (s390_is_ifunc_symbol_p (h))
2408
0
      relocation = (htab->elf.iplt->output_section->vma
2409
0
        + htab->elf.iplt->output_offset
2410
0
        + h->plt.offset);
2411
0
    else
2412
0
      relocation = (htab->elf.splt->output_section->vma
2413
0
        + htab->elf.splt->output_offset
2414
0
        + h->plt.offset);
2415
0
    unresolved_reloc = false;
2416
0
    break;
2417
2418
0
  case R_390_PLTOFF16:
2419
0
  case R_390_PLTOFF32:
2420
    /* Relocation is to the entry for this symbol in the
2421
       procedure linkage table relative to the start of the GOT.  */
2422
2423
    /* For local symbols or if we didn't make a PLT entry for
2424
       this symbol resolve the symbol directly.  */
2425
0
    if (h == NULL
2426
0
        || h->plt.offset == (bfd_vma) -1
2427
0
        || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2428
0
      {
2429
0
        relocation -= htab->elf.sgot->output_section->vma;
2430
0
        break;
2431
0
      }
2432
2433
0
    if (s390_is_ifunc_symbol_p (h))
2434
0
      relocation = (htab->elf.iplt->output_section->vma
2435
0
        + htab->elf.iplt->output_offset
2436
0
        + h->plt.offset
2437
0
        - htab->elf.sgot->output_section->vma);
2438
0
    else
2439
0
      relocation = (htab->elf.splt->output_section->vma
2440
0
        + htab->elf.splt->output_offset
2441
0
        + h->plt.offset
2442
0
        - htab->elf.sgot->output_section->vma);
2443
0
    unresolved_reloc = false;
2444
0
    break;
2445
2446
0
  case R_390_PC16:
2447
0
  case R_390_PC12DBL:
2448
0
  case R_390_PC16DBL:
2449
0
  case R_390_PC24DBL:
2450
0
  case R_390_PC32DBL:
2451
0
  case R_390_PC32:
2452
0
    if (h != NULL
2453
0
        && s390_is_ifunc_symbol_p (h)
2454
0
        && h->def_regular
2455
0
        && !bfd_link_executable (info))
2456
0
      {
2457
        /* This will not work our if the function does not
2458
     happen to set up the GOT pointer for some other
2459
     reason.  31 bit PLT entries require r12 to hold the
2460
     GOT pointer.
2461
     FIXME: Implement an errorcheck.
2462
     NOTE: It will work when brasl is not available
2463
     (e.g. with -m31 -march=g5) since a local function
2464
     call then does use GOTOFF which implies r12 being set
2465
     up.  */
2466
0
        relocation = (htab->elf.iplt->output_section->vma
2467
0
          + htab->elf.iplt->output_offset
2468
0
          + h ->plt.offset);
2469
0
        goto do_relocation;
2470
0
      }
2471
    /* Fall through.  */
2472
2473
0
  case R_390_8:
2474
0
  case R_390_16:
2475
0
  case R_390_32:
2476
0
    if ((input_section->flags & SEC_ALLOC) == 0)
2477
0
      break;
2478
2479
0
    if (h != NULL
2480
0
        && s390_is_ifunc_symbol_p (h)
2481
0
        && h->def_regular)
2482
0
      {
2483
0
        if (!bfd_link_pic (info))
2484
0
    {
2485
      /* For a non-shared object STT_GNU_IFUNC symbol must
2486
         go through PLT.  */
2487
0
      relocation = (htab->elf.iplt->output_section->vma
2488
0
        + htab->elf.iplt->output_offset
2489
0
        + h ->plt.offset);
2490
0
      goto do_relocation;
2491
0
    }
2492
0
        else
2493
0
    {
2494
      /* For shared objects a runtime relocation is needed.  */
2495
2496
0
      Elf_Internal_Rela outrel;
2497
0
      asection *sreloc;
2498
2499
      /* Need a dynamic relocation to get the real function
2500
         address.  */
2501
0
      outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2502
0
                   info,
2503
0
                   input_section,
2504
0
                   rel->r_offset);
2505
0
      if (outrel.r_offset == (bfd_vma) -1
2506
0
          || outrel.r_offset == (bfd_vma) -2)
2507
0
        abort ();
2508
2509
0
      outrel.r_offset += (input_section->output_section->vma
2510
0
              + input_section->output_offset);
2511
2512
0
      if (h->dynindx == -1
2513
0
          || h->forced_local
2514
0
          || bfd_link_executable (info))
2515
0
        {
2516
          /* This symbol is resolved locally.  */
2517
0
          outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2518
0
          outrel.r_addend = (h->root.u.def.value
2519
0
           + h->root.u.def.section->output_section->vma
2520
0
           + h->root.u.def.section->output_offset);
2521
0
        }
2522
0
      else
2523
0
        {
2524
0
          outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2525
0
          outrel.r_addend = 0;
2526
0
        }
2527
2528
0
      sreloc = htab->elf.irelifunc;
2529
0
      elf_append_rela (output_bfd, sreloc, &outrel);
2530
2531
      /* If this reloc is against an external symbol, we
2532
         do not want to fiddle with the addend.  Otherwise,
2533
         we need to include the symbol value so that it
2534
         becomes an addend for the dynamic reloc.  For an
2535
         internal symbol, we have updated addend.  */
2536
0
      continue;
2537
0
    }
2538
0
      }
2539
2540
0
    if ((bfd_link_pic (info)
2541
0
         && (h == NULL
2542
0
       || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2543
0
           && !resolved_to_zero)
2544
0
       || h->root.type != bfd_link_hash_undefweak)
2545
0
         && ((r_type != R_390_PC16
2546
0
        && r_type != R_390_PC12DBL
2547
0
        && r_type != R_390_PC16DBL
2548
0
        && r_type != R_390_PC24DBL
2549
0
        && r_type != R_390_PC32DBL
2550
0
        && r_type != R_390_PC32)
2551
0
       || !SYMBOL_CALLS_LOCAL (info, h)))
2552
0
        || (ELIMINATE_COPY_RELOCS
2553
0
      && !bfd_link_pic (info)
2554
0
      && h != NULL
2555
0
      && h->dynindx != -1
2556
0
      && !h->non_got_ref
2557
0
      && ((h->def_dynamic
2558
0
           && !h->def_regular)
2559
0
          || h->root.type == bfd_link_hash_undefweak
2560
0
          || h->root.type == bfd_link_hash_undefined)))
2561
0
      {
2562
0
        Elf_Internal_Rela outrel;
2563
0
        bool skip, relocate;
2564
0
        asection *sreloc;
2565
0
        bfd_byte *loc;
2566
2567
        /* When generating a shared object, these relocations
2568
     are copied into the output file to be resolved at run
2569
     time.  */
2570
2571
0
        skip = false;
2572
0
        relocate = false;
2573
2574
0
        outrel.r_offset =
2575
0
    _bfd_elf_section_offset (output_bfd, info, input_section,
2576
0
           rel->r_offset);
2577
0
        if (outrel.r_offset == (bfd_vma) -1)
2578
0
    skip = true;
2579
0
        else if (outrel.r_offset == (bfd_vma) -2)
2580
0
    skip = true, relocate = true;
2581
0
        outrel.r_offset += (input_section->output_section->vma
2582
0
          + input_section->output_offset);
2583
2584
0
        if (skip)
2585
0
    memset (&outrel, 0, sizeof outrel);
2586
0
        else if (h != NULL
2587
0
           && h->dynindx != -1
2588
0
           && (r_type == R_390_PC16
2589
0
         || r_type == R_390_PC12DBL
2590
0
         || r_type == R_390_PC16DBL
2591
0
         || r_type == R_390_PC24DBL
2592
0
         || r_type == R_390_PC32DBL
2593
0
         || r_type == R_390_PC32
2594
0
         || !bfd_link_pic (info)
2595
0
         || !SYMBOLIC_BIND (info, h)
2596
0
         || !h->def_regular))
2597
0
    {
2598
0
      outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2599
0
      outrel.r_addend = rel->r_addend;
2600
0
    }
2601
0
        else
2602
0
    {
2603
      /* This symbol is local, or marked to become local.  */
2604
0
      outrel.r_addend = relocation + rel->r_addend;
2605
0
      if (r_type == R_390_32)
2606
0
        {
2607
0
          relocate = true;
2608
0
          outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2609
0
        }
2610
0
      else
2611
0
        {
2612
0
          long sindx;
2613
2614
0
          if (bfd_is_abs_section (sec))
2615
0
      sindx = 0;
2616
0
          else if (sec == NULL || sec->owner == NULL)
2617
0
      {
2618
0
        bfd_set_error(bfd_error_bad_value);
2619
0
        return false;
2620
0
      }
2621
0
          else
2622
0
      {
2623
0
        asection *osec;
2624
2625
0
        osec = sec->output_section;
2626
0
        sindx = elf_section_data (osec)->dynindx;
2627
0
        if (sindx == 0)
2628
0
          {
2629
0
            osec = htab->elf.text_index_section;
2630
0
            sindx = elf_section_data (osec)->dynindx;
2631
0
          }
2632
0
        BFD_ASSERT (sindx != 0);
2633
2634
        /* We are turning this relocation into one
2635
           against a section symbol, so subtract out
2636
           the output section's address but not the
2637
           offset of the input section in the output
2638
           section.  */
2639
0
        outrel.r_addend -= osec->vma;
2640
0
      }
2641
0
          outrel.r_info = ELF32_R_INFO (sindx, r_type);
2642
0
        }
2643
0
    }
2644
2645
0
        sreloc = elf_section_data (input_section)->sreloc;
2646
0
        if (sreloc == NULL)
2647
0
    abort ();
2648
2649
0
        loc = sreloc->contents;
2650
0
        loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2651
0
        bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2652
2653
        /* If this reloc is against an external symbol, we do
2654
     not want to fiddle with the addend.  Otherwise, we
2655
     need to include the symbol value so that it becomes
2656
     an addend for the dynamic reloc.  */
2657
0
        if (! relocate)
2658
0
    continue;
2659
0
      }
2660
0
    break;
2661
2662
    /* Relocations for tls literal pool entries.  */
2663
0
  case R_390_TLS_IE32:
2664
0
    if (bfd_link_pic (info))
2665
0
      {
2666
0
        Elf_Internal_Rela outrel;
2667
0
        asection *sreloc;
2668
0
        bfd_byte *loc;
2669
2670
0
        outrel.r_offset = rel->r_offset
2671
0
        + input_section->output_section->vma
2672
0
        + input_section->output_offset;
2673
0
        outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2674
0
        sreloc = elf_section_data (input_section)->sreloc;
2675
0
        if (sreloc == NULL)
2676
0
    abort ();
2677
0
        loc = sreloc->contents;
2678
0
        loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2679
0
        bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2680
0
      }
2681
    /* Fall through.  */
2682
2683
0
  case R_390_TLS_GD32:
2684
0
  case R_390_TLS_GOTIE32:
2685
0
    r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2686
0
    tls_type = GOT_UNKNOWN;
2687
0
    if (h == NULL && local_got_offsets)
2688
0
      tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2689
0
    else if (h != NULL)
2690
0
      {
2691
0
        tls_type = elf_s390_hash_entry(h)->tls_type;
2692
0
        if (!bfd_link_pic (info)
2693
0
      && h->dynindx == -1
2694
0
      && tls_type >= GOT_TLS_IE)
2695
0
    r_type = R_390_TLS_LE32;
2696
0
      }
2697
0
    if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2698
0
      r_type = R_390_TLS_IE32;
2699
2700
0
    if (r_type == R_390_TLS_LE32)
2701
0
      {
2702
        /* This relocation gets optimized away by the local exec
2703
     access optimization.  */
2704
0
        BFD_ASSERT (! unresolved_reloc);
2705
0
        bfd_put_32 (output_bfd, -tpoff (info, relocation) + rel->r_addend,
2706
0
        contents + rel->r_offset);
2707
0
        continue;
2708
0
      }
2709
2710
0
    if (htab->elf.sgot == NULL)
2711
0
      abort ();
2712
2713
0
    if (h != NULL)
2714
0
      off = h->got.offset;
2715
0
    else
2716
0
      {
2717
0
        if (local_got_offsets == NULL)
2718
0
    abort ();
2719
2720
0
        off = local_got_offsets[r_symndx];
2721
0
      }
2722
2723
0
  emit_tls_relocs:
2724
2725
0
    if ((off & 1) != 0)
2726
0
      off &= ~1;
2727
0
    else
2728
0
      {
2729
0
        Elf_Internal_Rela outrel;
2730
0
        bfd_byte *loc;
2731
0
        int dr_type, indx;
2732
2733
0
        if (htab->elf.srelgot == NULL)
2734
0
    abort ();
2735
2736
0
        outrel.r_offset = (htab->elf.sgot->output_section->vma
2737
0
         + htab->elf.sgot->output_offset + off);
2738
2739
0
        indx = h && h->dynindx != -1 ? h->dynindx : 0;
2740
0
        if (r_type == R_390_TLS_GD32)
2741
0
    dr_type = R_390_TLS_DTPMOD;
2742
0
        else
2743
0
    dr_type = R_390_TLS_TPOFF;
2744
0
        if (dr_type == R_390_TLS_TPOFF && indx == 0)
2745
0
    outrel.r_addend = relocation - dtpoff_base (info);
2746
0
        else
2747
0
    outrel.r_addend = 0;
2748
0
        outrel.r_info = ELF32_R_INFO (indx, dr_type);
2749
0
        loc = htab->elf.srelgot->contents;
2750
0
        loc += htab->elf.srelgot->reloc_count++
2751
0
    * sizeof (Elf32_External_Rela);
2752
0
        bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2753
2754
0
        if (r_type == R_390_TLS_GD32)
2755
0
    {
2756
0
      if (indx == 0)
2757
0
        {
2758
0
          BFD_ASSERT (! unresolved_reloc);
2759
0
          bfd_put_32 (output_bfd,
2760
0
          relocation - dtpoff_base (info),
2761
0
          htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2762
0
        }
2763
0
      else
2764
0
        {
2765
0
          outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2766
0
          outrel.r_offset += GOT_ENTRY_SIZE;
2767
0
          outrel.r_addend = 0;
2768
0
          htab->elf.srelgot->reloc_count++;
2769
0
          loc += sizeof (Elf32_External_Rela);
2770
0
          bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2771
0
        }
2772
0
    }
2773
2774
0
        if (h != NULL)
2775
0
    h->got.offset |= 1;
2776
0
        else
2777
0
    local_got_offsets[r_symndx] |= 1;
2778
0
      }
2779
2780
0
    if (off >= (bfd_vma) -2)
2781
0
      abort ();
2782
0
    if (r_type == ELF32_R_TYPE (rel->r_info))
2783
0
      {
2784
0
        relocation = htab->elf.sgot->output_offset + off;
2785
0
        if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2786
0
    relocation += htab->elf.sgot->output_section->vma;
2787
0
        unresolved_reloc = false;
2788
0
      }
2789
0
    else
2790
0
      {
2791
0
        bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2792
0
        contents + rel->r_offset);
2793
0
        continue;
2794
0
      }
2795
0
    break;
2796
2797
0
  case R_390_TLS_GOTIE12:
2798
0
  case R_390_TLS_GOTIE20:
2799
0
  case R_390_TLS_IEENT:
2800
0
    if (h == NULL)
2801
0
      {
2802
0
        if (local_got_offsets == NULL)
2803
0
    abort();
2804
0
        off = local_got_offsets[r_symndx];
2805
0
        if (bfd_link_pic (info))
2806
0
    goto emit_tls_relocs;
2807
0
      }
2808
0
    else
2809
0
      {
2810
0
        off = h->got.offset;
2811
0
        tls_type = elf_s390_hash_entry(h)->tls_type;
2812
0
        if (bfd_link_pic (info)
2813
0
      || h->dynindx != -1
2814
0
      || tls_type < GOT_TLS_IE)
2815
0
    goto emit_tls_relocs;
2816
0
      }
2817
2818
0
    if (htab->elf.sgot == NULL)
2819
0
      abort ();
2820
2821
0
    BFD_ASSERT (! unresolved_reloc);
2822
0
    bfd_put_32 (output_bfd, -tpoff (info, relocation),
2823
0
          htab->elf.sgot->contents + off);
2824
0
    relocation = htab->elf.sgot->output_offset + off;
2825
0
    if (r_type == R_390_TLS_IEENT)
2826
0
      relocation += htab->elf.sgot->output_section->vma;
2827
0
    unresolved_reloc = false;
2828
0
    break;
2829
2830
0
  case R_390_TLS_LDM32:
2831
0
    if (! bfd_link_pic (info))
2832
      /* The literal pool entry this relocation refers to gets ignored
2833
         by the optimized code of the local exec model. Do nothing
2834
         and the value will turn out zero.  */
2835
0
      continue;
2836
2837
0
    if (htab->elf.sgot == NULL)
2838
0
      abort ();
2839
2840
0
    off = htab->tls_ldm_got.offset;
2841
0
    if (off & 1)
2842
0
      off &= ~1;
2843
0
    else
2844
0
      {
2845
0
        Elf_Internal_Rela outrel;
2846
0
        bfd_byte *loc;
2847
2848
0
        if (htab->elf.srelgot == NULL)
2849
0
    abort ();
2850
2851
0
        outrel.r_offset = (htab->elf.sgot->output_section->vma
2852
0
         + htab->elf.sgot->output_offset + off);
2853
2854
0
        bfd_put_32 (output_bfd, 0,
2855
0
        htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2856
0
        outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2857
0
        outrel.r_addend = 0;
2858
0
        loc = htab->elf.srelgot->contents;
2859
0
        loc += htab->elf.srelgot->reloc_count++
2860
0
    * sizeof (Elf32_External_Rela);
2861
0
        bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2862
0
        htab->tls_ldm_got.offset |= 1;
2863
0
      }
2864
0
    relocation = htab->elf.sgot->output_offset + off;
2865
0
    unresolved_reloc = false;
2866
0
    break;
2867
2868
0
  case R_390_TLS_LE32:
2869
0
    if (bfd_link_dll (info))
2870
0
      {
2871
        /* Linking a shared library with non-fpic code requires
2872
     a R_390_TLS_TPOFF relocation.  */
2873
0
        Elf_Internal_Rela outrel;
2874
0
        asection *sreloc;
2875
0
        bfd_byte *loc;
2876
0
        int indx;
2877
2878
0
        outrel.r_offset = rel->r_offset
2879
0
        + input_section->output_section->vma
2880
0
        + input_section->output_offset;
2881
0
        if (h != NULL && h->dynindx != -1)
2882
0
    indx = h->dynindx;
2883
0
        else
2884
0
    indx = 0;
2885
0
        outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2886
0
        if (indx == 0)
2887
0
    outrel.r_addend = relocation - dtpoff_base (info);
2888
0
        else
2889
0
    outrel.r_addend = 0;
2890
0
        sreloc = elf_section_data (input_section)->sreloc;
2891
0
        if (sreloc == NULL)
2892
0
    abort ();
2893
0
        loc = sreloc->contents;
2894
0
        loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2895
0
        bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2896
0
      }
2897
0
    else
2898
0
      {
2899
0
        BFD_ASSERT (! unresolved_reloc);
2900
0
        bfd_put_32 (output_bfd, -tpoff (info, relocation) + rel->r_addend,
2901
0
        contents + rel->r_offset);
2902
0
      }
2903
0
    continue;
2904
2905
0
  case R_390_TLS_LDO32:
2906
0
    if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
2907
0
      relocation -= dtpoff_base (info);
2908
0
    else
2909
      /* When converting LDO to LE, we must negate.  */
2910
0
      relocation = -tpoff (info, relocation);
2911
0
    break;
2912
2913
    /* Relocations for tls instructions.  */
2914
0
  case R_390_TLS_LOAD:
2915
0
  case R_390_TLS_GDCALL:
2916
0
  case R_390_TLS_LDCALL:
2917
0
    tls_type = GOT_UNKNOWN;
2918
0
    if (h == NULL && local_got_offsets)
2919
0
      tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2920
0
    else if (h != NULL)
2921
0
      tls_type = elf_s390_hash_entry(h)->tls_type;
2922
2923
0
    if (tls_type == GOT_TLS_GD)
2924
0
      continue;
2925
2926
0
    if (r_type == R_390_TLS_LOAD)
2927
0
      {
2928
0
        if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
2929
0
    {
2930
      /* IE->LE transition. Four valid cases:
2931
         l %rx,0(0,%ry)    -> lr %rx,%ry + bcr 0,0
2932
         l %rx,0(%ry,0)    -> lr %rx,%ry + bcr 0,0
2933
         l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2934
         l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2935
0
      unsigned int insn, ry;
2936
2937
0
      insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2938
0
      if ((insn & 0xff00f000) == 0x58000000)
2939
        /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0  */
2940
0
        ry = (insn & 0x000f0000);
2941
0
      else if ((insn & 0xff0f0000) == 0x58000000)
2942
        /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0  */
2943
0
        ry = (insn & 0x0000f000) << 4;
2944
0
      else if ((insn & 0xff00f000) == 0x5800c000)
2945
        /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0  */
2946
0
        ry = (insn & 0x000f0000);
2947
0
      else if ((insn & 0xff0f0000) == 0x580c0000)
2948
        /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0  */
2949
0
        ry = (insn & 0x0000f000) << 4;
2950
0
      else
2951
0
        {
2952
0
          invalid_tls_insn (input_bfd, input_section, rel);
2953
0
          return false;
2954
0
        }
2955
0
      insn = 0x18000700 | (insn & 0x00f00000) | ry;
2956
0
      bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2957
0
    }
2958
0
      }
2959
0
    else if (r_type == R_390_TLS_GDCALL)
2960
0
      {
2961
0
        unsigned int insn;
2962
2963
0
        insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2964
0
        if ((insn & 0xff000fff) != 0x4d000000 &&
2965
0
      (insn & 0xffff0000) != 0xc0e50000 &&
2966
0
      (insn & 0xff000000) != 0x0d000000)
2967
0
    {
2968
0
      invalid_tls_insn (input_bfd, input_section, rel);
2969
0
      return false;
2970
0
    }
2971
0
        if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
2972
0
    {
2973
0
      if ((insn & 0xff000000) == 0x0d000000)
2974
0
        {
2975
          /* GD->LE transition.
2976
       basr rx, ry -> nopr r7 */
2977
0
          insn = 0x07070000 | (insn & 0xffff);
2978
0
        }
2979
0
      else if ((insn & 0xff000000) == 0x4d000000)
2980
0
        {
2981
          /* GD->LE transition.
2982
       bas %r14,0(%rx,%r13) -> bc 0,0  */
2983
0
          insn = 0x47000000;
2984
0
        }
2985
0
      else
2986
0
        {
2987
          /* GD->LE transition.
2988
       brasl %r14,_tls_get_offset@plt -> brcl 0,.  */
2989
0
          insn = 0xc0040000;
2990
0
          bfd_put_16 (output_bfd, 0x0000,
2991
0
          contents + rel->r_offset + 4);
2992
0
        }
2993
0
    }
2994
0
        else
2995
0
    {
2996
      /* If basr is used in the pic case to invoke
2997
         _tls_get_offset, something went wrong before.  */
2998
0
      if ((insn & 0xff000000) == 0x0d000000)
2999
0
        {
3000
0
          invalid_tls_insn (input_bfd, input_section, rel);
3001
0
          return false;
3002
0
        }
3003
3004
0
      if ((insn & 0xff000000) == 0x4d000000)
3005
0
        {
3006
          /* GD->IE transition.
3007
       bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12)  */
3008
0
          insn = 0x5822c000;
3009
0
        }
3010
0
      else
3011
0
        {
3012
          /* GD->IE transition.
3013
       brasl %r14,__tls_get_addr@plt ->
3014
        l %r2,0(%r2,%r12) ; bcr 0,0 */
3015
0
          insn = 0x5822c000;
3016
0
          bfd_put_16 (output_bfd, 0x0700,
3017
0
          contents + rel->r_offset + 4);
3018
0
        }
3019
0
    }
3020
0
        bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3021
0
      }
3022
0
    else if (r_type == R_390_TLS_LDCALL)
3023
0
      {
3024
0
        if (!bfd_link_pic (info))
3025
0
    {
3026
0
      unsigned int insn;
3027
3028
0
      insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3029
0
      if ((insn & 0xff000fff) != 0x4d000000 &&
3030
0
          (insn & 0xffff0000) != 0xc0e50000 &&
3031
0
          (insn & 0xff000000) != 0x0d000000)
3032
0
        {
3033
0
          invalid_tls_insn (input_bfd, input_section, rel);
3034
0
          return false;
3035
0
        }
3036
3037
0
      if ((insn & 0xff000000) == 0x0d000000)
3038
0
        {
3039
          /* LD->LE transition.
3040
       basr rx, ry -> nopr r7 */
3041
0
          insn = 0x07070000 | (insn & 0xffff);
3042
0
        }
3043
0
      else if ((insn & 0xff000000) == 0x4d000000)
3044
0
        {
3045
          /* LD->LE transition.
3046
       bas %r14,0(%rx,%r13) -> bc 0,0  */
3047
0
          insn = 0x47000000;
3048
0
        }
3049
0
      else
3050
0
        {
3051
          /* LD->LE transition.
3052
       brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3053
0
          insn = 0xc0040000;
3054
0
          bfd_put_16 (output_bfd, 0x0000,
3055
0
          contents + rel->r_offset + 4);
3056
0
        }
3057
0
      bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3058
0
    }
3059
0
      }
3060
0
    continue;
3061
3062
0
  default:
3063
0
    break;
3064
0
  }
3065
3066
      /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3067
   because such sections are not SEC_ALLOC and thus ld.so will
3068
   not process them.  */
3069
0
      if (unresolved_reloc
3070
0
    && !((input_section->flags & SEC_DEBUGGING) != 0
3071
0
         && h->def_dynamic)
3072
0
    && _bfd_elf_section_offset (output_bfd, info, input_section,
3073
0
              rel->r_offset) != (bfd_vma) -1)
3074
0
  _bfd_error_handler
3075
    /* xgettext:c-format */
3076
0
    (_("%pB(%pA+%#" PRIx64 "): "
3077
0
       "unresolvable %s relocation against symbol `%s'"),
3078
0
     input_bfd,
3079
0
     input_section,
3080
0
     (uint64_t) rel->r_offset,
3081
0
     howto->name,
3082
0
     h->root.root.string);
3083
3084
0
    do_relocation:
3085
3086
      /* When applying a 24 bit reloc we need to start one byte
3087
   earlier.  Otherwise the 32 bit get/put bfd operations might
3088
   access a byte after the actual section.  */
3089
0
      if (r_type == R_390_PC24DBL
3090
0
    || r_type == R_390_PLT24DBL)
3091
0
  rel->r_offset--;
3092
3093
0
      if (r_type == R_390_20
3094
0
    || r_type == R_390_GOT20
3095
0
    || r_type == R_390_GOTPLT20
3096
0
    || r_type == R_390_TLS_GOTIE20)
3097
0
  {
3098
0
    relocation += rel->r_addend;
3099
0
    relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3100
0
    r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3101
0
          contents, rel->r_offset,
3102
0
          relocation, 0);
3103
0
  }
3104
0
      else
3105
0
  r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3106
0
              contents, rel->r_offset,
3107
0
              relocation, rel->r_addend);
3108
3109
0
      if (r != bfd_reloc_ok)
3110
0
  {
3111
0
    const char *name;
3112
3113
0
    if (h != NULL)
3114
0
      name = h->root.root.string;
3115
0
    else
3116
0
      {
3117
0
        name = bfd_elf_string_from_elf_section (input_bfd,
3118
0
                  symtab_hdr->sh_link,
3119
0
                  sym->st_name);
3120
0
        if (name == NULL)
3121
0
    return false;
3122
0
        if (*name == '\0')
3123
0
    name = bfd_section_name (sec);
3124
0
      }
3125
3126
0
    if (r == bfd_reloc_overflow)
3127
0
      (*info->callbacks->reloc_overflow)
3128
0
        (info, (h ? &h->root : NULL), name, howto->name,
3129
0
         (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3130
0
    else
3131
0
      {
3132
0
        _bfd_error_handler
3133
    /* xgettext:c-format */
3134
0
    (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3135
0
     input_bfd, input_section,
3136
0
     (uint64_t) rel->r_offset, name, (int) r);
3137
0
        return false;
3138
0
      }
3139
0
  }
3140
0
    }
3141
3142
0
  return true;
3143
0
}
3144
3145
/* Generate the PLT slots together with the dynamic relocations needed
3146
   for IFUNC symbols.  */
3147
3148
static void
3149
elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3150
            struct bfd_link_info *info,
3151
            struct elf_link_hash_entry *h,
3152
            struct elf_s390_link_hash_table *htab,
3153
            bfd_vma iplt_offset,
3154
            bfd_vma resolver_address)
3155
0
{
3156
0
  bfd_vma iplt_index;
3157
0
  bfd_vma got_offset;
3158
0
  bfd_vma igotiplt_offset;
3159
0
  Elf_Internal_Rela rela;
3160
0
  bfd_byte *loc;
3161
0
  asection *plt, *gotplt, *relplt;
3162
0
  bfd_vma relative_offset;
3163
3164
0
  if (htab->elf.iplt == NULL
3165
0
      || htab->elf.igotplt == NULL
3166
0
      || htab->elf.irelplt == NULL)
3167
0
    abort ();
3168
3169
0
  gotplt = htab->elf.igotplt;
3170
0
  relplt = htab->elf.irelplt;
3171
3172
  /* Index of the PLT slot within iplt section.  */
3173
0
  iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3174
0
  plt = htab->elf.iplt;
3175
  /* Offset into the igot.plt section.  */
3176
0
  igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3177
  /* Offset into the got section.  */
3178
0
  got_offset = igotiplt_offset + gotplt->output_offset;
3179
3180
  /* S390 uses halfwords for relative branch calc!  */
3181
0
  relative_offset = - (plt->output_offset +
3182
0
           (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3183
  /* If offset is > 32768, branch to a previous branch
3184
     390 can only handle +-64 K jumps.  */
3185
0
  if ( -32768 > (int) relative_offset )
3186
0
    relative_offset
3187
0
      = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3188
3189
  /* Fill in the entry in the procedure linkage table.  */
3190
0
  if (!bfd_link_pic (info))
3191
0
    {
3192
0
      memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3193
0
        PLT_ENTRY_SIZE);
3194
3195
      /* Adjust jump to the first plt entry.  */
3196
0
      bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3197
0
      plt->contents + iplt_offset + 20);
3198
3199
      /* Push the GOT offset field.  */
3200
0
      bfd_put_32 (output_bfd,
3201
0
      (gotplt->output_section->vma
3202
0
       + got_offset),
3203
0
      plt->contents + iplt_offset + 24);
3204
0
    }
3205
0
  else if (got_offset < 4096)
3206
0
    {
3207
      /* The GOT offset is small enough to be used directly as
3208
   displacement.  */
3209
0
      memcpy (plt->contents + iplt_offset,
3210
0
        elf_s390_plt_pic12_entry,
3211
0
        PLT_ENTRY_SIZE);
3212
3213
      /* Put in the GOT offset as displacement value.  The 0xc000
3214
   value comes from the first word of the plt entry.  Look
3215
   at the elf_s390_plt_pic16_entry content.  */
3216
0
      bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3217
0
      plt->contents + iplt_offset + 2);
3218
3219
      /* Adjust the jump to the first plt entry.  */
3220
0
      bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3221
0
      plt->contents + iplt_offset + 20);
3222
0
    }
3223
0
  else if (got_offset < 32768)
3224
0
    {
3225
      /* The GOT offset is too big for a displacement but small
3226
   enough to be a signed 16 bit immediate value as it can be
3227
   used in an lhi instruction.  */
3228
0
      memcpy (plt->contents + iplt_offset,
3229
0
        elf_s390_plt_pic16_entry,
3230
0
        PLT_ENTRY_SIZE);
3231
3232
      /* Put in the GOT offset for the lhi instruction.  */
3233
0
      bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3234
0
      plt->contents + iplt_offset + 2);
3235
3236
      /* Adjust the jump to the first plt entry.  */
3237
0
      bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3238
0
      plt->contents + iplt_offset + 20);
3239
0
    }
3240
0
  else
3241
0
    {
3242
0
      memcpy (plt->contents + iplt_offset,
3243
0
        elf_s390_plt_pic_entry,
3244
0
        PLT_ENTRY_SIZE);
3245
3246
      /* Adjust the jump to the first plt entry.  */
3247
0
      bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3248
0
      plt->contents + iplt_offset + 20);
3249
3250
      /* Push the GOT offset field.  */
3251
0
      bfd_put_32 (output_bfd, got_offset,
3252
0
      plt->contents + iplt_offset + 24);
3253
0
    }
3254
  /* Insert offset into  reloc. table here.  */
3255
0
  bfd_put_32 (output_bfd, relplt->output_offset +
3256
0
        iplt_index * RELA_ENTRY_SIZE,
3257
0
        plt->contents + iplt_offset + 28);
3258
3259
  /* Fill in the entry in the global offset table.
3260
     Points to instruction after GOT offset.  */
3261
0
  bfd_put_32 (output_bfd,
3262
0
        (plt->output_section->vma
3263
0
         + plt->output_offset
3264
0
         + iplt_offset
3265
0
         + 12),
3266
0
        gotplt->contents + igotiplt_offset);
3267
3268
  /* Fill in the entry in the .rela.plt section.  */
3269
0
  rela.r_offset = gotplt->output_section->vma + got_offset;
3270
3271
0
  if (!h
3272
0
      || h->dynindx == -1
3273
0
      || ((bfd_link_executable (info)
3274
0
     || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3275
0
    && h->def_regular))
3276
0
    {
3277
      /* The symbol can be locally resolved.  */
3278
0
      rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3279
0
      rela.r_addend = resolver_address;
3280
0
    }
3281
0
  else
3282
0
    {
3283
0
      rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3284
0
      rela.r_addend = 0;
3285
0
    }
3286
3287
0
  loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3288
0
  bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3289
0
}
3290
3291
/* Finish up dynamic symbol handling.  We set the contents of various
3292
   dynamic sections here.  */
3293
3294
static bool
3295
elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3296
        struct bfd_link_info *info,
3297
        struct elf_link_hash_entry *h,
3298
        Elf_Internal_Sym *sym)
3299
0
{
3300
0
  struct elf_s390_link_hash_table *htab;
3301
0
  struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3302
3303
0
  htab = elf_s390_hash_table (info);
3304
3305
0
  if (h->plt.offset != (bfd_vma) -1)
3306
0
    {
3307
0
      bfd_vma plt_index;
3308
0
      bfd_vma got_offset;
3309
0
      Elf_Internal_Rela rela;
3310
0
      bfd_byte *loc;
3311
0
      bfd_vma relative_offset;
3312
3313
      /* This symbol has an entry in the procedure linkage table.  Set
3314
   it up.  */
3315
0
      if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3316
0
  {
3317
0
    elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3318
0
      htab, h->plt.offset,
3319
0
      eh->ifunc_resolver_address +
3320
0
      eh->ifunc_resolver_section->output_offset +
3321
0
      eh->ifunc_resolver_section->output_section->vma);
3322
    /* Do not return yet.  Handling of explicit GOT slots of
3323
       IFUNC symbols is below.  */
3324
0
  }
3325
0
      else
3326
0
  {
3327
0
    if (h->dynindx == -1
3328
0
        || htab->elf.splt == NULL
3329
0
        || htab->elf.sgotplt == NULL
3330
0
        || htab->elf.srelplt == NULL)
3331
0
      abort ();
3332
3333
    /* Calc. index no.
3334
       Current offset - size first entry / entry size.  */
3335
0
    plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3336
3337
    /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3338
       addr & GOT addr.  */
3339
0
    got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3340
3341
    /* S390 uses halfwords for relative branch calc!  */
3342
0
    relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3343
0
        (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3344
    /* If offset is > 32768, branch to a previous branch
3345
       390 can only handle +-64 K jumps.  */
3346
0
    if ( -32768 > (int) relative_offset )
3347
0
      relative_offset
3348
0
        = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3349
3350
    /* Fill in the entry in the procedure linkage table.  */
3351
0
    if (!bfd_link_pic (info))
3352
0
      {
3353
0
        memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3354
0
          PLT_ENTRY_SIZE);
3355
3356
        /* Adjust jump to the first plt entry.  */
3357
0
        bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3358
0
        htab->elf.splt->contents + h->plt.offset + 20);
3359
3360
        /* Push the GOT offset field.  */
3361
0
        bfd_put_32 (output_bfd,
3362
0
        (htab->elf.sgotplt->output_section->vma
3363
0
         + htab->elf.sgotplt->output_offset
3364
0
         + got_offset),
3365
0
        htab->elf.splt->contents + h->plt.offset + 24);
3366
0
      }
3367
0
    else if (got_offset < 4096)
3368
0
      {
3369
        /* The GOT offset is small enough to be used directly as
3370
     displacement.  */
3371
0
        memcpy (htab->elf.splt->contents + h->plt.offset,
3372
0
          elf_s390_plt_pic12_entry,
3373
0
          PLT_ENTRY_SIZE);
3374
3375
        /* Put in the GOT offset as displacement value.  The 0xc000
3376
     value comes from the first word of the plt entry.  Look
3377
     at the elf_s390_plt_pic12_entry content.  */
3378
0
        bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3379
0
        htab->elf.splt->contents + h->plt.offset + 2);
3380
3381
        /* Adjust the jump to the first plt entry.  */
3382
0
        bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3383
0
        htab->elf.splt->contents + h->plt.offset + 20);
3384
0
      }
3385
0
    else if (got_offset < 32768)
3386
0
      {
3387
        /* The GOT offset is too big for a displacement but small
3388
     enough to be a signed 16 bit immediate value as it can be
3389
     used in an lhi instruction.  */
3390
0
        memcpy (htab->elf.splt->contents + h->plt.offset,
3391
0
          elf_s390_plt_pic16_entry,
3392
0
          PLT_ENTRY_SIZE);
3393
3394
        /* Put in the GOT offset for the lhi instruction.  */
3395
0
        bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3396
0
        htab->elf.splt->contents + h->plt.offset + 2);
3397
3398
        /* Adjust the jump to the first plt entry.  */
3399
0
        bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3400
0
        htab->elf.splt->contents + h->plt.offset + 20);
3401
0
      }
3402
0
    else
3403
0
      {
3404
0
        memcpy (htab->elf.splt->contents + h->plt.offset,
3405
0
          elf_s390_plt_pic_entry,
3406
0
          PLT_ENTRY_SIZE);
3407
3408
        /* Adjust the jump to the first plt entry.  */
3409
0
        bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3410
0
        htab->elf.splt->contents + h->plt.offset + 20);
3411
3412
        /* Push the GOT offset field.  */
3413
0
        bfd_put_32 (output_bfd, got_offset,
3414
0
        htab->elf.splt->contents + h->plt.offset + 24);
3415
0
      }
3416
    /* Insert offset into  reloc. table here.  */
3417
0
    bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3418
0
          htab->elf.splt->contents + h->plt.offset + 28);
3419
3420
    /* Fill in the entry in the global offset table.
3421
       Points to instruction after GOT offset.  */
3422
0
    bfd_put_32 (output_bfd,
3423
0
          (htab->elf.splt->output_section->vma
3424
0
           + htab->elf.splt->output_offset
3425
0
           + h->plt.offset
3426
0
           + 12),
3427
0
          htab->elf.sgotplt->contents + got_offset);
3428
3429
    /* Fill in the entry in the .rela.plt section.  */
3430
0
    rela.r_offset = (htab->elf.sgotplt->output_section->vma
3431
0
         + htab->elf.sgotplt->output_offset
3432
0
         + got_offset);
3433
0
    rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3434
0
    rela.r_addend = 0;
3435
0
    loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3436
0
    bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3437
3438
0
    if (!h->def_regular)
3439
0
      {
3440
        /* Mark the symbol as undefined, rather than as defined in
3441
     the .plt section.  Leave the value alone.  This is a clue
3442
     for the dynamic linker, to make function pointer
3443
     comparisons work between an application and shared
3444
     library.  */
3445
0
        sym->st_shndx = SHN_UNDEF;
3446
0
      }
3447
0
  }
3448
0
    }
3449
3450
0
  if (h->got.offset != (bfd_vma) -1
3451
0
      && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3452
0
      && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3453
0
      && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3454
0
    {
3455
0
      Elf_Internal_Rela rela;
3456
0
      bfd_byte *loc;
3457
3458
      /* This symbol has an entry in the global offset table.  Set it
3459
   up.  */
3460
3461
0
      if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3462
0
  abort ();
3463
3464
0
      rela.r_offset = (htab->elf.sgot->output_section->vma
3465
0
           + htab->elf.sgot->output_offset
3466
0
           + (h->got.offset &~ (bfd_vma) 1));
3467
3468
      /* If this is a static link, or it is a -Bsymbolic link and the
3469
   symbol is defined locally or was forced to be local because
3470
   of a version file, we just want to emit a RELATIVE reloc.
3471
   The entry in the global offset table will already have been
3472
   initialized in the relocate_section function.  */
3473
0
      if (h->def_regular && s390_is_ifunc_symbol_p (h))
3474
0
  {
3475
0
    if (bfd_link_pic (info))
3476
0
      {
3477
        /* An explicit GOT slot usage needs GLOB_DAT.  If the
3478
     symbol references local the implicit got.iplt slot
3479
     will be used and the IRELATIVE reloc has been created
3480
     above.  */
3481
0
        goto do_glob_dat;
3482
0
      }
3483
0
    else
3484
0
      {
3485
        /* For non-shared objects explicit GOT slots must be
3486
     filled with the PLT slot address for pointer
3487
     equality reasons.  */
3488
0
        bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3489
0
               + htab->elf.iplt->output_offset
3490
0
               + h->plt.offset),
3491
0
        htab->elf.sgot->contents + h->got.offset);
3492
0
        return true;
3493
0
      }
3494
0
  }
3495
0
      else if (bfd_link_pic (info)
3496
0
         && SYMBOL_REFERENCES_LOCAL (info, h))
3497
0
  {
3498
0
    if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3499
0
      return true;
3500
3501
    /* If this is a static link, or it is a -Bsymbolic link and
3502
       the symbol is defined locally or was forced to be local
3503
       because of a version file, we just want to emit a
3504
       RELATIVE reloc.  The entry in the global offset table
3505
       will already have been initialized in the
3506
       relocate_section function.  */
3507
0
    if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3508
0
      return false;
3509
0
    BFD_ASSERT((h->got.offset & 1) != 0);
3510
0
    rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3511
0
    rela.r_addend = (h->root.u.def.value
3512
0
         + h->root.u.def.section->output_section->vma
3513
0
         + h->root.u.def.section->output_offset);
3514
0
  }
3515
0
      else
3516
0
  {
3517
0
    BFD_ASSERT((h->got.offset & 1) == 0);
3518
0
  do_glob_dat:
3519
0
    bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3520
0
    rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3521
0
    rela.r_addend = 0;
3522
0
  }
3523
3524
0
      loc = htab->elf.srelgot->contents;
3525
0
      loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3526
0
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3527
0
    }
3528
3529
0
  if (h->needs_copy)
3530
0
    {
3531
0
      Elf_Internal_Rela rela;
3532
0
      asection *s;
3533
0
      bfd_byte *loc;
3534
3535
      /* This symbols needs a copy reloc.  Set it up.  */
3536
3537
0
      if (h->dynindx == -1
3538
0
    || (h->root.type != bfd_link_hash_defined
3539
0
        && h->root.type != bfd_link_hash_defweak)
3540
0
    || htab->elf.srelbss == NULL
3541
0
    || htab->elf.sreldynrelro == NULL)
3542
0
  abort ();
3543
3544
0
      rela.r_offset = (h->root.u.def.value
3545
0
           + h->root.u.def.section->output_section->vma
3546
0
           + h->root.u.def.section->output_offset);
3547
0
      rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3548
0
      rela.r_addend = 0;
3549
0
      if (h->root.u.def.section == htab->elf.sdynrelro)
3550
0
  s = htab->elf.sreldynrelro;
3551
0
      else
3552
0
  s = htab->elf.srelbss;
3553
0
      loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3554
0
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3555
0
    }
3556
3557
  /* Mark some specially defined symbols as absolute.  */
3558
0
  if (h == htab->elf.hdynamic
3559
0
      || h == htab->elf.hgot
3560
0
      || h == htab->elf.hplt)
3561
0
    sym->st_shndx = SHN_ABS;
3562
3563
0
  return true;
3564
0
}
3565
3566
/* Used to decide how to sort relocs in an optimal manner for the
3567
   dynamic linker, before writing them out.  */
3568
3569
static enum elf_reloc_type_class
3570
elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3571
         const asection *rel_sec ATTRIBUTE_UNUSED,
3572
         const Elf_Internal_Rela *rela)
3573
0
{
3574
0
  bfd *abfd = info->output_bfd;
3575
0
  const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3576
0
  struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3577
0
  unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3578
0
  Elf_Internal_Sym sym;
3579
3580
0
  if (htab->elf.dynsym == NULL
3581
0
      || !bed->s->swap_symbol_in (abfd,
3582
0
          (htab->elf.dynsym->contents
3583
0
           + r_symndx * bed->s->sizeof_sym),
3584
0
          0, &sym))
3585
0
    abort ();
3586
3587
  /* Check relocation against STT_GNU_IFUNC symbol.  */
3588
0
  if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3589
0
    return reloc_class_ifunc;
3590
3591
0
  switch ((int) ELF32_R_TYPE (rela->r_info))
3592
0
    {
3593
0
    case R_390_RELATIVE:
3594
0
      return reloc_class_relative;
3595
0
    case R_390_JMP_SLOT:
3596
0
      return reloc_class_plt;
3597
0
    case R_390_COPY:
3598
0
      return reloc_class_copy;
3599
0
    default:
3600
0
      return reloc_class_normal;
3601
0
    }
3602
0
}
3603
3604
/* Finish up the dynamic sections.  */
3605
3606
static bool
3607
elf_s390_finish_dynamic_sections (bfd *output_bfd,
3608
          struct bfd_link_info *info)
3609
0
{
3610
0
  struct elf_s390_link_hash_table *htab;
3611
0
  bfd *dynobj;
3612
0
  asection *sdyn;
3613
0
  bfd *ibfd;
3614
0
  unsigned int i;
3615
3616
0
  htab = elf_s390_hash_table (info);
3617
0
  dynobj = htab->elf.dynobj;
3618
0
  sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3619
3620
0
  if (htab->elf.dynamic_sections_created)
3621
0
    {
3622
0
      Elf32_External_Dyn *dyncon, *dynconend;
3623
3624
0
      if (sdyn == NULL || htab->elf.sgot == NULL)
3625
0
  abort ();
3626
3627
0
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
3628
0
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3629
0
      for (; dyncon < dynconend; dyncon++)
3630
0
  {
3631
0
    Elf_Internal_Dyn dyn;
3632
0
    asection *s;
3633
3634
0
    bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3635
3636
0
    switch (dyn.d_tag)
3637
0
      {
3638
0
      default:
3639
0
        continue;
3640
3641
0
      case DT_PLTGOT:
3642
0
        s = htab->elf.sgotplt;
3643
0
        dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3644
0
        break;
3645
3646
0
      case DT_JMPREL:
3647
0
        s = htab->elf.srelplt;
3648
0
        dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3649
0
        break;
3650
3651
0
      case DT_PLTRELSZ:
3652
0
        dyn.d_un.d_val = htab->elf.srelplt->size;
3653
0
        if (htab->elf.irelplt)
3654
0
    dyn.d_un.d_val += htab->elf.irelplt->size;
3655
0
        break;
3656
0
      }
3657
3658
0
    bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3659
0
  }
3660
3661
      /* Fill in the special first entry in the procedure linkage table.  */
3662
0
      if (htab->elf.splt && htab->elf.splt->size > 0)
3663
0
  {
3664
0
    memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3665
0
    if (bfd_link_pic (info))
3666
0
      {
3667
0
        memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3668
0
          PLT_FIRST_ENTRY_SIZE);
3669
0
      }
3670
0
    else
3671
0
      {
3672
0
        memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3673
0
          PLT_FIRST_ENTRY_SIZE);
3674
0
        bfd_put_32 (output_bfd,
3675
0
        htab->elf.sgotplt->output_section->vma
3676
0
        + htab->elf.sgotplt->output_offset,
3677
0
        htab->elf.splt->contents + 24);
3678
0
      }
3679
0
    elf_section_data (htab->elf.splt->output_section)
3680
0
      ->this_hdr.sh_entsize = 4;
3681
0
  }
3682
3683
0
    }
3684
3685
0
  if (htab->elf.sgotplt)
3686
0
    {
3687
      /* Fill in the first three entries in the global offset table.  */
3688
0
      if (htab->elf.sgotplt->size > 0)
3689
0
  {
3690
0
    bfd_put_32 (output_bfd,
3691
0
          (sdyn == NULL ? (bfd_vma) 0
3692
0
           : sdyn->output_section->vma + sdyn->output_offset),
3693
0
          htab->elf.sgotplt->contents);
3694
    /* One entry for shared object struct ptr.  */
3695
0
    bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3696
    /* One entry for _dl_runtime_resolve.  */
3697
0
    bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3698
0
  }
3699
3700
0
      elf_section_data (htab->elf.sgotplt->output_section)
3701
0
  ->this_hdr.sh_entsize = 4;
3702
0
    }
3703
  /* Finish dynamic symbol for local IFUNC symbols.  */
3704
0
  for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3705
0
    {
3706
0
      struct plt_entry *local_plt;
3707
0
      Elf_Internal_Sym *isym;
3708
0
      Elf_Internal_Shdr *symtab_hdr;
3709
3710
0
      symtab_hdr = &elf_symtab_hdr (ibfd);
3711
3712
0
      if (!is_s390_elf (ibfd))
3713
0
  continue;
3714
3715
0
      local_plt = elf_s390_local_plt (ibfd);
3716
0
      if (local_plt != NULL)
3717
0
  for (i = 0; i < symtab_hdr->sh_info; i++)
3718
0
    {
3719
0
      if (local_plt[i].plt.offset != (bfd_vma) -1)
3720
0
        {
3721
0
    asection *sec = local_plt[i].sec;
3722
0
    isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, ibfd, i);
3723
0
    if (isym == NULL)
3724
0
      return false;
3725
3726
0
    if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3727
0
      elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3728
0
            local_plt[i].plt.offset,
3729
0
            isym->st_value
3730
0
            + sec->output_section->vma
3731
0
            + sec->output_offset);
3732
3733
0
        }
3734
0
    }
3735
0
    }
3736
0
  return true;
3737
0
}
3738

3739
/* Support for core dump NOTE sections.  */
3740
3741
static bool
3742
elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3743
0
{
3744
0
  int offset;
3745
0
  unsigned int size;
3746
3747
0
  switch (note->descsz)
3748
0
    {
3749
0
    default:
3750
0
      return false;
3751
3752
0
    case 224:     /* S/390 Linux.  */
3753
      /* pr_cursig */
3754
0
      elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3755
3756
      /* pr_pid */
3757
0
      elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3758
3759
      /* pr_reg */
3760
0
      offset = 72;
3761
0
      size = 144;
3762
0
      break;
3763
0
    }
3764
3765
  /* Make a ".reg/999" section.  */
3766
0
  return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3767
0
            size, note->descpos + offset);
3768
0
}
3769
3770
static bool
3771
elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3772
0
{
3773
0
  switch (note->descsz)
3774
0
    {
3775
0
    default:
3776
0
      return false;
3777
3778
0
    case 124:     /* sizeof(struct elf_prpsinfo) on s390 */
3779
0
      elf_tdata (abfd)->core->pid
3780
0
  = bfd_get_32 (abfd, note->descdata + 12);
3781
0
      elf_tdata (abfd)->core->program
3782
0
  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
3783
0
      elf_tdata (abfd)->core->command
3784
0
  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
3785
0
      break;
3786
0
    }
3787
3788
  /* Note that for some reason, a spurious space is tacked
3789
     onto the end of the args in some (at least one anyway)
3790
     implementations, so strip it off if it exists.  */
3791
3792
0
  {
3793
0
    char *command = elf_tdata (abfd)->core->command;
3794
0
    int n = strlen (command);
3795
3796
0
    if (0 < n && command[n - 1] == ' ')
3797
0
      command[n - 1] = '\0';
3798
0
  }
3799
3800
0
  return true;
3801
0
}
3802
3803
static char *
3804
elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3805
        int note_type, ...)
3806
0
{
3807
0
  va_list ap;
3808
3809
0
  switch (note_type)
3810
0
    {
3811
0
    default:
3812
0
      return NULL;
3813
3814
0
    case NT_PRPSINFO:
3815
0
      {
3816
0
  char data[124] ATTRIBUTE_NONSTRING = { 0 };
3817
0
  const char *fname, *psargs;
3818
3819
0
  va_start (ap, note_type);
3820
0
  fname = va_arg (ap, const char *);
3821
0
  psargs = va_arg (ap, const char *);
3822
0
  va_end (ap);
3823
3824
0
  strncpy (data + 28, fname, 16);
3825
#if GCC_VERSION == 8000 || GCC_VERSION == 8001
3826
  DIAGNOSTIC_PUSH;
3827
  /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3828
     -Wstringop-truncation:
3829
     https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3830
   */
3831
  DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3832
#endif
3833
0
  strncpy (data + 44, psargs, 80);
3834
#if GCC_VERSION == 8000 || GCC_VERSION == 8001
3835
  DIAGNOSTIC_POP;
3836
#endif
3837
0
  return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3838
0
           &data, sizeof (data));
3839
0
      }
3840
3841
0
    case NT_PRSTATUS:
3842
0
      {
3843
0
  char data[224] = { 0 };
3844
0
  long pid;
3845
0
  int cursig;
3846
0
  const void *gregs;
3847
3848
0
  va_start (ap, note_type);
3849
0
  pid = va_arg (ap, long);
3850
0
  cursig = va_arg (ap, int);
3851
0
  gregs = va_arg (ap, const void *);
3852
0
  va_end (ap);
3853
3854
0
  bfd_put_16 (abfd, cursig, data + 12);
3855
0
  bfd_put_32 (abfd, pid, data + 24);
3856
0
  memcpy (data + 72, gregs, 144);
3857
0
  return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3858
0
           &data, sizeof (data));
3859
0
      }
3860
0
    }
3861
  /* NOTREACHED */
3862
0
}
3863

3864
/* Return address for Ith PLT stub in section PLT, for relocation REL
3865
   or (bfd_vma) -1 if it should not be included.  */
3866
3867
static bfd_vma
3868
elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3869
          const arelent *rel ATTRIBUTE_UNUSED)
3870
0
{
3871
0
  return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3872
0
}
3873
3874
/* Merge backend specific data from an object file to the output
3875
   object file when linking.  */
3876
3877
static bool
3878
elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3879
0
{
3880
0
  bfd *obfd = info->output_bfd;
3881
3882
0
  if (!is_s390_elf (ibfd) || !is_s390_elf (obfd))
3883
0
    return true;
3884
3885
0
  if (!elf_s390_merge_obj_attributes (ibfd, info))
3886
0
    return false;
3887
3888
0
  elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3889
0
  return true;
3890
0
}
3891
3892
3893
#define TARGET_BIG_SYM  s390_elf32_vec
3894
#define TARGET_BIG_NAME "elf32-s390"
3895
#define ELF_ARCH  bfd_arch_s390
3896
#define ELF_TARGET_ID S390_ELF_DATA
3897
#define ELF_MACHINE_CODE EM_S390
3898
#define ELF_MACHINE_ALT1 EM_S390_OLD
3899
#define ELF_MAXPAGESIZE 0x1000
3900
3901
#define elf_backend_can_gc_sections 1
3902
#define elf_backend_can_refcount  1
3903
#define elf_backend_want_got_plt  1
3904
#define elf_backend_plt_readonly  1
3905
#define elf_backend_want_plt_sym  0
3906
#define elf_backend_got_header_size 12
3907
#define elf_backend_want_dynrelro 1
3908
#define elf_backend_rela_normal   1
3909
3910
#define elf_info_to_howto         elf_s390_info_to_howto
3911
3912
#define bfd_elf32_bfd_is_local_label_name     elf_s390_is_local_label_name
3913
#define bfd_elf32_bfd_link_hash_table_create  elf_s390_link_hash_table_create
3914
#define bfd_elf32_bfd_reloc_type_lookup       elf_s390_reloc_type_lookup
3915
#define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3916
3917
#define bfd_elf32_bfd_merge_private_bfd_data  elf32_s390_merge_private_bfd_data
3918
3919
#define elf_backend_adjust_dynamic_symbol     elf_s390_adjust_dynamic_symbol
3920
#define elf_backend_check_relocs        elf_s390_check_relocs
3921
#define elf_backend_copy_indirect_symbol      elf_s390_copy_indirect_symbol
3922
#define elf_backend_create_dynamic_sections   _bfd_elf_create_dynamic_sections
3923
#define elf_backend_finish_dynamic_sections   elf_s390_finish_dynamic_sections
3924
#define elf_backend_finish_dynamic_symbol     elf_s390_finish_dynamic_symbol
3925
#define elf_backend_gc_mark_hook        elf_s390_gc_mark_hook
3926
#define elf_backend_reloc_type_class        elf_s390_reloc_type_class
3927
#define elf_backend_relocate_section        elf_s390_relocate_section
3928
#define elf_backend_late_size_sections        elf_s390_late_size_sections
3929
#define elf_backend_init_index_section        _bfd_elf_init_1_index_section
3930
#define elf_backend_grok_prstatus       elf_s390_grok_prstatus
3931
#define elf_backend_grok_psinfo         elf_s390_grok_psinfo
3932
#define elf_backend_write_core_note       elf_s390_write_core_note
3933
#define elf_backend_plt_sym_val         elf_s390_plt_sym_val
3934
#define elf_backend_sort_relocs_p       elf_s390_elf_sort_relocs_p
3935
3936
#define bfd_elf32_mkobject    elf_s390_mkobject
3937
#define elf_backend_object_p    elf_s390_object_p
3938
3939
#define elf_backend_linux_prpsinfo32_ugid16 true
3940
3941
#include "elf32-target.h"