Coverage Report

Created: 2023-08-28 06:31

/src/binutils-gdb/bfd/elf32-i386.c
Line
Count
Source (jump to first uncovered line)
1
/* Intel 80386/80486-specific support for 32-bit ELF
2
   Copyright (C) 1993-2023 Free Software Foundation, Inc.
3
4
   This file is part of BFD, the Binary File Descriptor library.
5
6
   This program is free software; you can redistribute it and/or modify
7
   it under the terms of the GNU General Public License as published by
8
   the Free Software Foundation; either version 3 of the License, or
9
   (at your option) any later version.
10
11
   This program is distributed in the hope that it will be useful,
12
   but WITHOUT ANY WARRANTY; without even the implied warranty of
13
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
   GNU General Public License for more details.
15
16
   You should have received a copy of the GNU General Public License
17
   along with this program; if not, write to the Free Software
18
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19
   MA 02110-1301, USA.  */
20
21
#include "elfxx-x86.h"
22
#include "elf-vxworks.h"
23
#include "dwarf2.h"
24
#include "opcode/i386.h"
25
26
/* 386 uses REL relocations instead of RELA.  */
27
#define USE_REL 1
28
29
static reloc_howto_type elf_howto_table[]=
30
{
31
  HOWTO(R_386_NONE, 0, 0, 0, false, 0, complain_overflow_dont,
32
  bfd_elf_generic_reloc, "R_386_NONE",
33
  true, 0x00000000, 0x00000000, false),
34
  HOWTO(R_386_32, 0, 4, 32, false, 0, complain_overflow_dont,
35
  bfd_elf_generic_reloc, "R_386_32",
36
  true, 0xffffffff, 0xffffffff, false),
37
  HOWTO(R_386_PC32, 0, 4, 32, true, 0, complain_overflow_dont,
38
  bfd_elf_generic_reloc, "R_386_PC32",
39
  true, 0xffffffff, 0xffffffff, true),
40
  HOWTO(R_386_GOT32, 0, 4, 32, false, 0, complain_overflow_dont,
41
  bfd_elf_generic_reloc, "R_386_GOT32",
42
  true, 0xffffffff, 0xffffffff, false),
43
  HOWTO(R_386_PLT32, 0, 4, 32, true, 0, complain_overflow_dont,
44
  bfd_elf_generic_reloc, "R_386_PLT32",
45
  true, 0xffffffff, 0xffffffff, true),
46
  HOWTO(R_386_COPY, 0, 4, 32, false, 0, complain_overflow_dont,
47
  bfd_elf_generic_reloc, "R_386_COPY",
48
  true, 0xffffffff, 0xffffffff, false),
49
  HOWTO(R_386_GLOB_DAT, 0, 4, 32, false, 0, complain_overflow_dont,
50
  bfd_elf_generic_reloc, "R_386_GLOB_DAT",
51
  true, 0xffffffff, 0xffffffff, false),
52
  HOWTO(R_386_JUMP_SLOT, 0, 4, 32, false, 0, complain_overflow_dont,
53
  bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
54
  true, 0xffffffff, 0xffffffff, false),
55
  HOWTO(R_386_RELATIVE, 0, 4, 32, false, 0, complain_overflow_dont,
56
  bfd_elf_generic_reloc, "R_386_RELATIVE",
57
  true, 0xffffffff, 0xffffffff, false),
58
  HOWTO(R_386_GOTOFF, 0, 4, 32, false, 0, complain_overflow_dont,
59
  bfd_elf_generic_reloc, "R_386_GOTOFF",
60
  true, 0xffffffff, 0xffffffff, false),
61
  HOWTO(R_386_GOTPC, 0, 4, 32, true, 0, complain_overflow_dont,
62
  bfd_elf_generic_reloc, "R_386_GOTPC",
63
  true, 0xffffffff, 0xffffffff, true),
64
65
  /* We have a gap in the reloc numbers here.
66
     R_386_standard counts the number up to this point, and
67
     R_386_ext_offset is the value to subtract from a reloc type of
68
     R_386_16 thru R_386_PC8 to form an index into this table.  */
69
37.8k
#define R_386_standard (R_386_GOTPC + 1)
70
0
#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
71
72
  /* These relocs are a GNU extension.  */
73
  HOWTO(R_386_TLS_TPOFF, 0, 4, 32, false, 0, complain_overflow_dont,
74
  bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
75
  true, 0xffffffff, 0xffffffff, false),
76
  HOWTO(R_386_TLS_IE, 0, 4, 32, false, 0, complain_overflow_dont,
77
  bfd_elf_generic_reloc, "R_386_TLS_IE",
78
  true, 0xffffffff, 0xffffffff, false),
79
  HOWTO(R_386_TLS_GOTIE, 0, 4, 32, false, 0, complain_overflow_dont,
80
  bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
81
  true, 0xffffffff, 0xffffffff, false),
82
  HOWTO(R_386_TLS_LE, 0, 4, 32, false, 0, complain_overflow_dont,
83
  bfd_elf_generic_reloc, "R_386_TLS_LE",
84
  true, 0xffffffff, 0xffffffff, false),
85
  HOWTO(R_386_TLS_GD, 0, 4, 32, false, 0, complain_overflow_dont,
86
  bfd_elf_generic_reloc, "R_386_TLS_GD",
87
  true, 0xffffffff, 0xffffffff, false),
88
  HOWTO(R_386_TLS_LDM, 0, 4, 32, false, 0, complain_overflow_dont,
89
  bfd_elf_generic_reloc, "R_386_TLS_LDM",
90
  true, 0xffffffff, 0xffffffff, false),
91
  HOWTO(R_386_16, 0, 2, 16, false, 0, complain_overflow_bitfield,
92
  bfd_elf_generic_reloc, "R_386_16",
93
  true, 0xffff, 0xffff, false),
94
  HOWTO(R_386_PC16, 0, 2, 16, true, 0, complain_overflow_bitfield,
95
  bfd_elf_generic_reloc, "R_386_PC16",
96
  true, 0xffff, 0xffff, true),
97
  HOWTO(R_386_8, 0, 1, 8, false, 0, complain_overflow_bitfield,
98
  bfd_elf_generic_reloc, "R_386_8",
99
  true, 0xff, 0xff, false),
100
  HOWTO(R_386_PC8, 0, 1, 8, true, 0, complain_overflow_signed,
101
  bfd_elf_generic_reloc, "R_386_PC8",
102
  true, 0xff, 0xff, true),
103
104
0
#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
105
0
#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
106
  /* These are common with Solaris TLS implementation.  */
107
  HOWTO(R_386_TLS_LDO_32, 0, 4, 32, false, 0, complain_overflow_dont,
108
  bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
109
  true, 0xffffffff, 0xffffffff, false),
110
  HOWTO(R_386_TLS_IE_32, 0, 4, 32, false, 0, complain_overflow_dont,
111
  bfd_elf_generic_reloc, "R_386_TLS_IE_32",
112
  true, 0xffffffff, 0xffffffff, false),
113
  HOWTO(R_386_TLS_LE_32, 0, 4, 32, false, 0, complain_overflow_dont,
114
  bfd_elf_generic_reloc, "R_386_TLS_LE_32",
115
  true, 0xffffffff, 0xffffffff, false),
116
  HOWTO(R_386_TLS_DTPMOD32, 0, 4, 32, false, 0, complain_overflow_dont,
117
  bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
118
  true, 0xffffffff, 0xffffffff, false),
119
  HOWTO(R_386_TLS_DTPOFF32, 0, 4, 32, false, 0, complain_overflow_dont,
120
  bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
121
  true, 0xffffffff, 0xffffffff, false),
122
  HOWTO(R_386_TLS_TPOFF32, 0, 4, 32, false, 0, complain_overflow_dont,
123
  bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
124
  true, 0xffffffff, 0xffffffff, false),
125
  HOWTO(R_386_SIZE32, 0, 4, 32, false, 0, complain_overflow_dont,
126
  bfd_elf_generic_reloc, "R_386_SIZE32",
127
  true, 0xffffffff, 0xffffffff, false),
128
  HOWTO(R_386_TLS_GOTDESC, 0, 4, 32, false, 0, complain_overflow_dont,
129
  bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
130
  true, 0xffffffff, 0xffffffff, false),
131
  HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, false, 0, complain_overflow_dont,
132
  bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
133
  false, 0, 0, false),
134
  HOWTO(R_386_TLS_DESC, 0, 4, 32, false, 0, complain_overflow_dont,
135
  bfd_elf_generic_reloc, "R_386_TLS_DESC",
136
  true, 0xffffffff, 0xffffffff, false),
137
  HOWTO(R_386_IRELATIVE, 0, 4, 32, false, 0, complain_overflow_dont,
138
  bfd_elf_generic_reloc, "R_386_IRELATIVE",
139
  true, 0xffffffff, 0xffffffff, false),
140
  HOWTO(R_386_GOT32X, 0, 4, 32, false, 0, complain_overflow_dont,
141
  bfd_elf_generic_reloc, "R_386_GOT32X",
142
  true, 0xffffffff, 0xffffffff, false),
143
144
  /* Another gap.  */
145
0
#define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
146
0
#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
147
148
/* GNU extension to record C++ vtable hierarchy.  */
149
  HOWTO (R_386_GNU_VTINHERIT, /* type */
150
   0,     /* rightshift */
151
   4,     /* size */
152
   0,     /* bitsize */
153
   false,     /* pc_relative */
154
   0,     /* bitpos */
155
   complain_overflow_dont, /* complain_on_overflow */
156
   NULL,      /* special_function */
157
   "R_386_GNU_VTINHERIT", /* name */
158
   false,     /* partial_inplace */
159
   0,     /* src_mask */
160
   0,     /* dst_mask */
161
   false),    /* pcrel_offset */
162
163
/* GNU extension to record C++ vtable member usage.  */
164
  HOWTO (R_386_GNU_VTENTRY, /* type */
165
   0,     /* rightshift */
166
   4,     /* size */
167
   0,     /* bitsize */
168
   false,     /* pc_relative */
169
   0,     /* bitpos */
170
   complain_overflow_dont, /* complain_on_overflow */
171
   _bfd_elf_rel_vtable_reloc_fn, /* special_function */
172
   "R_386_GNU_VTENTRY", /* name */
173
   false,     /* partial_inplace */
174
   0,     /* src_mask */
175
   0,     /* dst_mask */
176
   false)     /* pcrel_offset */
177
178
0
#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
179
180
};
181
182
#ifdef DEBUG_GEN_RELOC
183
#define TRACE(str) \
184
  fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
185
#else
186
#define TRACE(str)
187
#endif
188
189
static reloc_howto_type *
190
elf_i386_reloc_type_lookup (bfd *abfd,
191
          bfd_reloc_code_real_type code)
192
0
{
193
0
  switch (code)
194
0
    {
195
0
    case BFD_RELOC_NONE:
196
0
      TRACE ("BFD_RELOC_NONE");
197
0
      return &elf_howto_table[R_386_NONE];
198
199
0
    case BFD_RELOC_32:
200
0
      TRACE ("BFD_RELOC_32");
201
0
      return &elf_howto_table[R_386_32];
202
203
0
    case BFD_RELOC_CTOR:
204
0
      TRACE ("BFD_RELOC_CTOR");
205
0
      return &elf_howto_table[R_386_32];
206
207
0
    case BFD_RELOC_32_PCREL:
208
0
      TRACE ("BFD_RELOC_PC32");
209
0
      return &elf_howto_table[R_386_PC32];
210
211
0
    case BFD_RELOC_386_GOT32:
212
0
      TRACE ("BFD_RELOC_386_GOT32");
213
0
      return &elf_howto_table[R_386_GOT32];
214
215
0
    case BFD_RELOC_386_PLT32:
216
0
      TRACE ("BFD_RELOC_386_PLT32");
217
0
      return &elf_howto_table[R_386_PLT32];
218
219
0
    case BFD_RELOC_386_COPY:
220
0
      TRACE ("BFD_RELOC_386_COPY");
221
0
      return &elf_howto_table[R_386_COPY];
222
223
0
    case BFD_RELOC_386_GLOB_DAT:
224
0
      TRACE ("BFD_RELOC_386_GLOB_DAT");
225
0
      return &elf_howto_table[R_386_GLOB_DAT];
226
227
0
    case BFD_RELOC_386_JUMP_SLOT:
228
0
      TRACE ("BFD_RELOC_386_JUMP_SLOT");
229
0
      return &elf_howto_table[R_386_JUMP_SLOT];
230
231
0
    case BFD_RELOC_386_RELATIVE:
232
0
      TRACE ("BFD_RELOC_386_RELATIVE");
233
0
      return &elf_howto_table[R_386_RELATIVE];
234
235
0
    case BFD_RELOC_386_GOTOFF:
236
0
      TRACE ("BFD_RELOC_386_GOTOFF");
237
0
      return &elf_howto_table[R_386_GOTOFF];
238
239
0
    case BFD_RELOC_386_GOTPC:
240
0
      TRACE ("BFD_RELOC_386_GOTPC");
241
0
      return &elf_howto_table[R_386_GOTPC];
242
243
      /* These relocs are a GNU extension.  */
244
0
    case BFD_RELOC_386_TLS_TPOFF:
245
0
      TRACE ("BFD_RELOC_386_TLS_TPOFF");
246
0
      return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
247
248
0
    case BFD_RELOC_386_TLS_IE:
249
0
      TRACE ("BFD_RELOC_386_TLS_IE");
250
0
      return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
251
252
0
    case BFD_RELOC_386_TLS_GOTIE:
253
0
      TRACE ("BFD_RELOC_386_TLS_GOTIE");
254
0
      return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
255
256
0
    case BFD_RELOC_386_TLS_LE:
257
0
      TRACE ("BFD_RELOC_386_TLS_LE");
258
0
      return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
259
260
0
    case BFD_RELOC_386_TLS_GD:
261
0
      TRACE ("BFD_RELOC_386_TLS_GD");
262
0
      return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
263
264
0
    case BFD_RELOC_386_TLS_LDM:
265
0
      TRACE ("BFD_RELOC_386_TLS_LDM");
266
0
      return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
267
268
0
    case BFD_RELOC_16:
269
0
      TRACE ("BFD_RELOC_16");
270
0
      return &elf_howto_table[R_386_16 - R_386_ext_offset];
271
272
0
    case BFD_RELOC_16_PCREL:
273
0
      TRACE ("BFD_RELOC_16_PCREL");
274
0
      return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
275
276
0
    case BFD_RELOC_8:
277
0
      TRACE ("BFD_RELOC_8");
278
0
      return &elf_howto_table[R_386_8 - R_386_ext_offset];
279
280
0
    case BFD_RELOC_8_PCREL:
281
0
      TRACE ("BFD_RELOC_8_PCREL");
282
0
      return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
283
284
    /* Common with Sun TLS implementation.  */
285
0
    case BFD_RELOC_386_TLS_LDO_32:
286
0
      TRACE ("BFD_RELOC_386_TLS_LDO_32");
287
0
      return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
288
289
0
    case BFD_RELOC_386_TLS_IE_32:
290
0
      TRACE ("BFD_RELOC_386_TLS_IE_32");
291
0
      return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
292
293
0
    case BFD_RELOC_386_TLS_LE_32:
294
0
      TRACE ("BFD_RELOC_386_TLS_LE_32");
295
0
      return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
296
297
0
    case BFD_RELOC_386_TLS_DTPMOD32:
298
0
      TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
299
0
      return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
300
301
0
    case BFD_RELOC_386_TLS_DTPOFF32:
302
0
      TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
303
0
      return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
304
305
0
    case BFD_RELOC_386_TLS_TPOFF32:
306
0
      TRACE ("BFD_RELOC_386_TLS_TPOFF32");
307
0
      return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
308
309
0
    case BFD_RELOC_SIZE32:
310
0
      TRACE ("BFD_RELOC_SIZE32");
311
0
      return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
312
313
0
    case BFD_RELOC_386_TLS_GOTDESC:
314
0
      TRACE ("BFD_RELOC_386_TLS_GOTDESC");
315
0
      return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
316
317
0
    case BFD_RELOC_386_TLS_DESC_CALL:
318
0
      TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
319
0
      return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
320
321
0
    case BFD_RELOC_386_TLS_DESC:
322
0
      TRACE ("BFD_RELOC_386_TLS_DESC");
323
0
      return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
324
325
0
    case BFD_RELOC_386_IRELATIVE:
326
0
      TRACE ("BFD_RELOC_386_IRELATIVE");
327
0
      return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
328
329
0
    case BFD_RELOC_386_GOT32X:
330
0
      TRACE ("BFD_RELOC_386_GOT32X");
331
0
      return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
332
333
0
    case BFD_RELOC_VTABLE_INHERIT:
334
0
      TRACE ("BFD_RELOC_VTABLE_INHERIT");
335
0
      return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
336
337
0
    case BFD_RELOC_VTABLE_ENTRY:
338
0
      TRACE ("BFD_RELOC_VTABLE_ENTRY");
339
0
      return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
340
341
0
    default:
342
0
      TRACE ("Unknown");
343
      /* xgettext:c-format */
344
0
      _bfd_error_handler (_("%pB: unsupported relocation type: %#x"),
345
0
        abfd, (int) code);
346
0
      bfd_set_error (bfd_error_bad_value);
347
0
      return NULL;
348
0
    }
349
0
}
350
351
static reloc_howto_type *
352
elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
353
          const char *r_name)
354
0
{
355
0
  unsigned int i;
356
357
0
  for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
358
0
    if (elf_howto_table[i].name != NULL
359
0
  && strcasecmp (elf_howto_table[i].name, r_name) == 0)
360
0
      return &elf_howto_table[i];
361
362
0
  return NULL;
363
0
}
364
365
static reloc_howto_type *
366
elf_i386_rtype_to_howto (unsigned r_type)
367
18.9k
{
368
18.9k
  unsigned int indx;
369
370
18.9k
  if ((indx = r_type) >= R_386_standard
371
18.9k
      && ((indx = r_type - R_386_ext_offset) - R_386_standard
372
0
    >= R_386_ext - R_386_standard)
373
18.9k
      && ((indx = r_type - R_386_tls_offset) - R_386_ext
374
0
    >= R_386_ext2 - R_386_ext)
375
18.9k
      && ((indx = r_type - R_386_vt_offset) - R_386_ext2
376
0
    >= R_386_vt - R_386_ext2))
377
0
      return NULL;
378
  /* PR 17512: file: 0f67f69d.  */
379
18.9k
  if (elf_howto_table [indx].type != r_type)
380
0
    return NULL;
381
18.9k
  return &elf_howto_table[indx];
382
18.9k
}
383
384
static bool
385
elf_i386_info_to_howto_rel (bfd *abfd,
386
          arelent *cache_ptr,
387
          Elf_Internal_Rela *dst)
388
18.9k
{
389
18.9k
  unsigned int r_type = ELF32_R_TYPE (dst->r_info);
390
391
18.9k
  if ((cache_ptr->howto = elf_i386_rtype_to_howto (r_type)) == NULL)
392
0
    {
393
      /* xgettext:c-format */
394
0
      _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
395
0
        abfd, r_type);
396
0
      bfd_set_error (bfd_error_bad_value);
397
0
      return false;
398
0
    }
399
400
18.9k
  return true;
401
18.9k
}
402
403
/* Return whether a symbol name implies a local label.  The UnixWare
404
   2.1 cc generates temporary symbols that start with .X, so we
405
   recognize them here.  FIXME: do other SVR4 compilers also use .X?.
406
   If so, we should move the .X recognition into
407
   _bfd_elf_is_local_label_name.  */
408
409
static bool
410
elf_i386_is_local_label_name (bfd *abfd, const char *name)
411
0
{
412
0
  if (name[0] == '.' && name[1] == 'X')
413
0
    return true;
414
415
0
  return _bfd_elf_is_local_label_name (abfd, name);
416
0
}
417

418
/* Support for core dump NOTE sections.  */
419
420
static bool
421
elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
422
0
{
423
0
  int offset;
424
0
  size_t size;
425
426
0
  if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
427
0
    {
428
0
      int pr_version = bfd_get_32 (abfd, note->descdata);
429
430
0
      if (pr_version != 1)
431
0
  return false;
432
433
      /* pr_cursig */
434
0
      elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
435
436
      /* pr_pid */
437
0
      elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
438
439
      /* pr_reg */
440
0
      offset = 28;
441
0
      size = bfd_get_32 (abfd, note->descdata + 8);
442
0
    }
443
0
  else
444
0
    {
445
0
      switch (note->descsz)
446
0
  {
447
0
  default:
448
0
    return false;
449
450
0
  case 144:   /* Linux/i386 */
451
    /* pr_cursig */
452
0
    elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
453
454
    /* pr_pid */
455
0
    elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
456
457
    /* pr_reg */
458
0
    offset = 72;
459
0
    size = 68;
460
461
0
    break;
462
0
  }
463
0
    }
464
465
  /* Make a ".reg/999" section.  */
466
0
  return _bfd_elfcore_make_pseudosection (abfd, ".reg",
467
0
            size, note->descpos + offset);
468
0
}
469
470
static bool
471
elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
472
0
{
473
0
  if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
474
0
    {
475
0
      int pr_version = bfd_get_32 (abfd, note->descdata);
476
477
0
      if (pr_version != 1)
478
0
  return false;
479
480
0
      elf_tdata (abfd)->core->program
481
0
  = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
482
0
      elf_tdata (abfd)->core->command
483
0
  = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
484
0
    }
485
0
  else
486
0
    {
487
0
      switch (note->descsz)
488
0
  {
489
0
  default:
490
0
    return false;
491
492
0
  case 124:   /* Linux/i386 elf_prpsinfo.  */
493
0
    elf_tdata (abfd)->core->pid
494
0
      = bfd_get_32 (abfd, note->descdata + 12);
495
0
    elf_tdata (abfd)->core->program
496
0
      = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
497
0
    elf_tdata (abfd)->core->command
498
0
      = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
499
0
  }
500
0
    }
501
502
  /* Note that for some reason, a spurious space is tacked
503
     onto the end of the args in some (at least one anyway)
504
     implementations, so strip it off if it exists.  */
505
0
  {
506
0
    char *command = elf_tdata (abfd)->core->command;
507
0
    int n = strlen (command);
508
509
0
    if (0 < n && command[n - 1] == ' ')
510
0
      command[n - 1] = '\0';
511
0
  }
512
513
0
  return true;
514
0
}
515

516
/* Functions for the i386 ELF linker.
517
518
   In order to gain some understanding of code in this file without
519
   knowing all the intricate details of the linker, note the
520
   following:
521
522
   Functions named elf_i386_* are called by external routines, other
523
   functions are only called locally.  elf_i386_* functions appear
524
   in this file more or less in the order in which they are called
525
   from external routines.  eg. elf_i386_scan_relocs is called
526
   early in the link process, elf_i386_finish_dynamic_sections is
527
   one of the last functions.  */
528
529
/* The size in bytes of an entry in the lazy procedure linkage table.  */
530
531
#define LAZY_PLT_ENTRY_SIZE 16
532
533
/* The size in bytes of an entry in the non-lazy procedure linkage
534
   table.  */
535
536
#define NON_LAZY_PLT_ENTRY_SIZE 8
537
538
/* The first entry in an absolute lazy procedure linkage table looks
539
   like this.  See the SVR4 ABI i386 supplement to see how this works.
540
   Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte.  */
541
542
static const bfd_byte elf_i386_lazy_plt0_entry[12] =
543
{
544
  0xff, 0x35, /* pushl contents of address */
545
  0, 0, 0, 0, /* replaced with address of .got + 4.  */
546
  0xff, 0x25, /* jmp indirect */
547
  0, 0, 0, 0  /* replaced with address of .got + 8.  */
548
};
549
550
/* Subsequent entries in an absolute lazy procedure linkage table look
551
   like this.  */
552
553
static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
554
{
555
  0xff, 0x25, /* jmp indirect */
556
  0, 0, 0, 0, /* replaced with address of this symbol in .got.  */
557
  0x68,   /* pushl immediate */
558
  0, 0, 0, 0, /* replaced with offset into relocation table.  */
559
  0xe9,   /* jmp relative */
560
  0, 0, 0, 0  /* replaced with offset to start of .plt.  */
561
};
562
563
/* The first entry in a PIC lazy procedure linkage table look like
564
   this.  Will be padded to LAZY_PLT_ENTRY_SIZE with
565
   lazy_plt->plt0_pad_byte.  */
566
567
static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
568
{
569
  0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570
  0xff, 0xa3, 8, 0, 0, 0  /* jmp *8(%ebx) */
571
};
572
573
/* Subsequent entries in a PIC lazy procedure linkage table look like
574
   this.  */
575
576
static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
577
{
578
  0xff, 0xa3, /* jmp *offset(%ebx) */
579
  0, 0, 0, 0, /* replaced with offset of this symbol in .got.  */
580
  0x68,   /* pushl immediate */
581
  0, 0, 0, 0, /* replaced with offset into relocation table.  */
582
  0xe9,   /* jmp relative */
583
  0, 0, 0, 0  /* replaced with offset to start of .plt.  */
584
};
585
586
/* Entries in the non-lazy procedure linkage table look like this.  */
587
588
static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
589
{
590
  0xff, 0x25, /* jmp indirect */
591
  0, 0, 0, 0, /* replaced with offset of this symbol in .got.  */
592
  0x66, 0x90  /* xchg %ax,%ax  */
593
};
594
595
/* Entries in the PIC non-lazy procedure linkage table look like
596
   this.  */
597
598
static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
599
{
600
  0xff, 0xa3, /* jmp *offset(%ebx)  */
601
  0, 0, 0, 0, /* replaced with offset of this symbol in .got.  */
602
  0x66, 0x90  /* xchg %ax,%ax  */
603
};
604
605
/* The first entry in an absolute IBT-enabled lazy procedure linkage
606
   table looks like this.  */
607
608
static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
609
{
610
  0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1]       */
611
  0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2]        */
612
  0x0f, 0x1f, 0x40, 0x00  /* nopl 0(%rax)       */
613
};
614
615
/* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
616
   table look like this.  Subsequent entries for a PIC IBT-enabled lazy
617
   procedure linkage table are the same.  */
618
619
static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
620
{
621
  0xf3, 0x0f, 0x1e, 0xfb, /* endbr32          */
622
  0x68, 0, 0, 0, 0,   /* pushl immediate        */
623
  0xe9, 0, 0, 0, 0,   /* jmp relative         */
624
  0x66, 0x90      /* xchg %ax,%ax         */
625
};
626
627
/* The first entry in a PIC IBT-enabled lazy procedure linkage table
628
   look like.  */
629
630
static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
631
{
632
  0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx)      */
633
  0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx)       */
634
  0x0f, 0x1f, 0x40, 0x00  /* nopl 0(%rax)       */
635
};
636
637
/* Entries for branches with IBT-enabled in the absolute non-lazey
638
   procedure linkage table look like this.  They have the same size
639
   as the lazy PLT entry.  */
640
641
static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
642
{
643
  0xf3, 0x0f, 0x1e, 0xfb,      /* endbr32         */
644
  0xff, 0x25, 0, 0, 0, 0,      /* jmp *name@GOT       */
645
  0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
646
};
647
648
/* Entries for branches with IBT-enabled in the PIC non-lazey procedure
649
   linkage table look like this.  They have the same size as the lazy
650
   PLT entry.  */
651
652
static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
653
{
654
  0xf3, 0x0f, 0x1e, 0xfb,      /* endbr32         */
655
  0xff, 0xa3, 0, 0, 0, 0,      /* jmp *name@GOT(%ebx)   */
656
  0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
657
};
658
659
/* .eh_frame covering the lazy .plt section.  */
660
661
static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
662
{
663
  PLT_CIE_LENGTH, 0, 0, 0,  /* CIE length */
664
  0, 0, 0, 0,     /* CIE ID */
665
  1,        /* CIE version */
666
  'z', 'R', 0,      /* Augmentation string */
667
  1,        /* Code alignment factor */
668
  0x7c,       /* Data alignment factor */
669
  8,        /* Return address column */
670
  1,        /* Augmentation size */
671
  DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
672
  DW_CFA_def_cfa, 4, 4,   /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
673
  DW_CFA_offset + 8, 1,   /* DW_CFA_offset: r8 (eip) at cfa-4 */
674
  DW_CFA_nop, DW_CFA_nop,
675
676
  PLT_FDE_LENGTH, 0, 0, 0,  /* FDE length */
677
  PLT_CIE_LENGTH + 8, 0, 0, 0,  /* CIE pointer */
678
  0, 0, 0, 0,     /* R_386_PC32 .plt goes here */
679
  0, 0, 0, 0,     /* .plt size goes here */
680
  0,        /* Augmentation size */
681
  DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
682
  DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
683
  DW_CFA_def_cfa_offset, 12,  /* DW_CFA_def_cfa_offset: 12 */
684
  DW_CFA_advance_loc + 10,  /* DW_CFA_advance_loc: 10 to __PLT__+16 */
685
  DW_CFA_def_cfa_expression,  /* DW_CFA_def_cfa_expression */
686
  11,       /* Block length */
687
  DW_OP_breg4, 4,   /* DW_OP_breg4 (esp): 4 */
688
  DW_OP_breg8, 0,   /* DW_OP_breg8 (eip): 0 */
689
  DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
690
  DW_OP_lit2, DW_OP_shl, DW_OP_plus,
691
  DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
692
};
693
694
/* .eh_frame covering the lazy .plt section with IBT-enabled.  */
695
696
static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
697
{
698
  PLT_CIE_LENGTH, 0, 0, 0,  /* CIE length */
699
  0, 0, 0, 0,     /* CIE ID */
700
  1,        /* CIE version */
701
  'z', 'R', 0,      /* Augmentation string */
702
  1,        /* Code alignment factor */
703
  0x7c,       /* Data alignment factor */
704
  8,        /* Return address column */
705
  1,        /* Augmentation size */
706
  DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
707
  DW_CFA_def_cfa, 4, 4,   /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
708
  DW_CFA_offset + 8, 1,   /* DW_CFA_offset: r8 (eip) at cfa-4 */
709
  DW_CFA_nop, DW_CFA_nop,
710
711
  PLT_FDE_LENGTH, 0, 0, 0,  /* FDE length */
712
  PLT_CIE_LENGTH + 8, 0, 0, 0,  /* CIE pointer */
713
  0, 0, 0, 0,     /* R_386_PC32 .plt goes here */
714
  0, 0, 0, 0,     /* .plt size goes here */
715
  0,        /* Augmentation size */
716
  DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
717
  DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
718
  DW_CFA_def_cfa_offset, 12,  /* DW_CFA_def_cfa_offset: 12 */
719
  DW_CFA_advance_loc + 10,  /* DW_CFA_advance_loc: 10 to __PLT__+16 */
720
  DW_CFA_def_cfa_expression,  /* DW_CFA_def_cfa_expression */
721
  11,       /* Block length */
722
  DW_OP_breg4, 4,   /* DW_OP_breg4 (esp): 4 */
723
  DW_OP_breg8, 0,   /* DW_OP_breg8 (eip): 0 */
724
  DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
725
  DW_OP_lit2, DW_OP_shl, DW_OP_plus,
726
  DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
727
};
728
729
/* .eh_frame covering the non-lazy .plt section.  */
730
731
static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
732
{
733
#define PLT_GOT_FDE_LENGTH    16
734
  PLT_CIE_LENGTH, 0, 0, 0,  /* CIE length */
735
  0, 0, 0, 0,     /* CIE ID */
736
  1,        /* CIE version */
737
  'z', 'R', 0,      /* Augmentation string */
738
  1,        /* Code alignment factor */
739
  0x7c,       /* Data alignment factor */
740
  8,        /* Return address column */
741
  1,        /* Augmentation size */
742
  DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
743
  DW_CFA_def_cfa, 4, 4,   /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
744
  DW_CFA_offset + 8, 1,   /* DW_CFA_offset: r8 (eip) at cfa-4 */
745
  DW_CFA_nop, DW_CFA_nop,
746
747
  PLT_GOT_FDE_LENGTH, 0, 0, 0,  /* FDE length */
748
  PLT_CIE_LENGTH + 8, 0, 0, 0,  /* CIE pointer */
749
  0, 0, 0, 0,     /* the start of non-lazy .plt goes here */
750
  0, 0, 0, 0,     /* non-lazy .plt size goes here */
751
  0,        /* Augmentation size */
752
  DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
753
};
754
755
/* These are the standard parameters.  */
756
static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
757
  {
758
    elf_i386_lazy_plt0_entry,   /* plt0_entry */
759
    sizeof (elf_i386_lazy_plt0_entry),  /* plt0_entry_size */
760
    elf_i386_lazy_plt_entry,    /* plt_entry */
761
    LAZY_PLT_ENTRY_SIZE,    /* plt_entry_size */
762
    NULL,       /* plt_tlsdesc_entry */
763
    0,          /* plt_tlsdesc_entry_size*/
764
    0,          /* plt_tlsdesc_got1_offset */
765
    0,          /* plt_tlsdesc_got2_offset */
766
    0,          /* plt_tlsdesc_got1_insn_end */
767
    0,          /* plt_tlsdesc_got2_insn_end */
768
    2,          /* plt0_got1_offset */
769
    8,          /* plt0_got2_offset */
770
    0,          /* plt0_got2_insn_end */
771
    2,          /* plt_got_offset */
772
    7,          /* plt_reloc_offset */
773
    12,         /* plt_plt_offset */
774
    0,          /* plt_got_insn_size */
775
    0,          /* plt_plt_insn_end */
776
    6,          /* plt_lazy_offset */
777
    elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
778
    elf_i386_pic_lazy_plt_entry,  /* pic_plt_entry */
779
    elf_i386_eh_frame_lazy_plt,   /* eh_frame_plt */
780
    sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
781
  };
782
783
static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
784
  {
785
    elf_i386_non_lazy_plt_entry,  /* plt_entry */
786
    elf_i386_pic_non_lazy_plt_entry,  /* pic_plt_entry */
787
    NON_LAZY_PLT_ENTRY_SIZE,    /* plt_entry_size */
788
    2,          /* plt_got_offset */
789
    0,          /* plt_got_insn_size */
790
    elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
791
    sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
792
  };
793
794
static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
795
  {
796
    elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
797
    sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
798
    elf_i386_lazy_ibt_plt_entry,  /* plt_entry */
799
    LAZY_PLT_ENTRY_SIZE,    /* plt_entry_size */
800
    NULL,       /* plt_tlsdesc_entry */
801
    0,          /* plt_tlsdesc_entry_size*/
802
    0,          /* plt_tlsdesc_got1_offset */
803
    0,          /* plt_tlsdesc_got2_offset */
804
    0,          /* plt_tlsdesc_got1_insn_end */
805
    0,          /* plt_tlsdesc_got2_insn_end */
806
    2,          /* plt0_got1_offset */
807
    8,          /* plt0_got2_offset */
808
    0,          /* plt0_got2_insn_end */
809
    4+2,        /* plt_got_offset */
810
    4+1,        /* plt_reloc_offset */
811
    4+6,        /* plt_plt_offset */
812
    0,          /* plt_got_insn_size */
813
    0,          /* plt_plt_insn_end */
814
    0,          /* plt_lazy_offset */
815
    elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
816
    elf_i386_lazy_ibt_plt_entry,  /* pic_plt_entry */
817
    elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
818
    sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
819
  };
820
821
static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
822
  {
823
    elf_i386_non_lazy_ibt_plt_entry,  /* plt_entry */
824
    elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
825
    LAZY_PLT_ENTRY_SIZE,    /* plt_entry_size */
826
    4+2,        /* plt_got_offset */
827
    0,          /* plt_got_insn_size */
828
    elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
829
    sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
830
  };
831

832
833
/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
834
   for the PLTResolve stub and then for each PLT entry.  */
835
0
#define PLTRESOLVE_RELOCS_SHLIB 0
836
0
#define PLTRESOLVE_RELOCS 2
837
0
#define PLT_NON_JUMP_SLOT_RELOCS 2
838
839
/* Return TRUE if the TLS access code sequence support transition
840
   from R_TYPE.  */
841
842
static bool
843
elf_i386_check_tls_transition (asection *sec,
844
             bfd_byte *contents,
845
             Elf_Internal_Shdr *symtab_hdr,
846
             struct elf_link_hash_entry **sym_hashes,
847
             unsigned int r_type,
848
             const Elf_Internal_Rela *rel,
849
             const Elf_Internal_Rela *relend)
850
0
{
851
0
  unsigned int val, type, reg;
852
0
  unsigned long r_symndx;
853
0
  struct elf_link_hash_entry *h;
854
0
  bfd_vma offset;
855
0
  bfd_byte *call;
856
0
  bool indirect_call;
857
858
0
  offset = rel->r_offset;
859
0
  switch (r_type)
860
0
    {
861
0
    case R_386_TLS_GD:
862
0
    case R_386_TLS_LDM:
863
0
      if (offset < 2 || (rel + 1) >= relend)
864
0
  return false;
865
866
0
      indirect_call = false;
867
0
      call = contents + offset + 4;
868
0
      val = *(call - 5);
869
0
      type = *(call - 6);
870
0
      if (r_type == R_386_TLS_GD)
871
0
  {
872
    /* Check transition from GD access model.  Only
873
    leal foo@tlsgd(,%ebx,1), %eax
874
    call ___tls_get_addr@PLT
875
       or
876
    leal foo@tlsgd(%ebx) %eax
877
    call ___tls_get_addr@PLT
878
    nop
879
       or
880
    leal foo@tlsgd(%reg), %eax
881
    call *___tls_get_addr@GOT(%reg)
882
    which may be converted to
883
    addr32 call ___tls_get_addr
884
       can transit to different access model.  */
885
0
    if ((offset + 10) > sec->size
886
0
        || (type != 0x8d && type != 0x04))
887
0
      return false;
888
889
0
    if (type == 0x04)
890
0
      {
891
        /* leal foo@tlsgd(,%ebx,1), %eax
892
     call ___tls_get_addr@PLT  */
893
0
        if (offset < 3)
894
0
    return false;
895
896
0
        if (*(call - 7) != 0x8d
897
0
      || val != 0x1d
898
0
      || call[0] != 0xe8)
899
0
    return false;
900
0
      }
901
0
    else
902
0
      {
903
        /* This must be
904
      leal foo@tlsgd(%ebx), %eax
905
      call ___tls_get_addr@PLT
906
      nop
907
     or
908
      leal foo@tlsgd(%reg), %eax
909
      call *___tls_get_addr@GOT(%reg)
910
      which may be converted to
911
      addr32 call ___tls_get_addr
912
913
     %eax can't be used as the GOT base register since it
914
     is used to pass parameter to ___tls_get_addr.  */
915
0
        reg = val & 7;
916
0
        if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
917
0
    return false;
918
919
0
        indirect_call = call[0] == 0xff;
920
0
        if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
921
0
      && !(call[0] == 0x67 && call[1] == 0xe8)
922
0
      && !(indirect_call
923
0
           && (call[1] & 0xf8) == 0x90
924
0
           && (call[1] & 0x7) == reg))
925
0
    return false;
926
0
      }
927
0
  }
928
0
      else
929
0
  {
930
    /* Check transition from LD access model.  Only
931
    leal foo@tlsldm(%ebx), %eax
932
    call ___tls_get_addr@PLT
933
       or
934
    leal foo@tlsldm(%reg), %eax
935
    call *___tls_get_addr@GOT(%reg)
936
    which may be converted to
937
    addr32 call ___tls_get_addr
938
       can transit to different access model.  */
939
0
    if (type != 0x8d || (offset + 9) > sec->size)
940
0
      return false;
941
942
    /* %eax can't be used as the GOT base register since it is
943
       used to pass parameter to ___tls_get_addr.  */
944
0
    reg = val & 7;
945
0
    if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
946
0
      return false;
947
948
0
    indirect_call = call[0] == 0xff;
949
0
    if (!(reg == 3 && call[0] == 0xe8)
950
0
        && !(call[0] == 0x67 && call[1] == 0xe8)
951
0
        && !(indirect_call
952
0
       && (call[1] & 0xf8) == 0x90
953
0
       && (call[1] & 0x7) == reg))
954
0
      return false;
955
0
  }
956
957
0
      r_symndx = ELF32_R_SYM (rel[1].r_info);
958
0
      if (r_symndx < symtab_hdr->sh_info)
959
0
  return false;
960
961
0
      h = sym_hashes[r_symndx - symtab_hdr->sh_info];
962
0
      if (h == NULL
963
0
    || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
964
0
  return false;
965
0
      else if (indirect_call)
966
0
  return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X
967
0
    || ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32);
968
0
      else
969
0
  return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
970
0
    || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
971
972
0
    case R_386_TLS_IE:
973
      /* Check transition from IE access model:
974
    movl foo@indntpoff(%rip), %eax
975
    movl foo@indntpoff(%rip), %reg
976
    addl foo@indntpoff(%rip), %reg
977
       */
978
979
0
      if (offset < 1 || (offset + 4) > sec->size)
980
0
  return false;
981
982
      /* Check "movl foo@tpoff(%rip), %eax" first.  */
983
0
      val = bfd_get_8 (abfd, contents + offset - 1);
984
0
      if (val == 0xa1)
985
0
  return true;
986
987
0
      if (offset < 2)
988
0
  return false;
989
990
      /* Check movl|addl foo@tpoff(%rip), %reg.   */
991
0
      type = bfd_get_8 (abfd, contents + offset - 2);
992
0
      return ((type == 0x8b || type == 0x03)
993
0
        && (val & 0xc7) == 0x05);
994
995
0
    case R_386_TLS_GOTIE:
996
0
    case R_386_TLS_IE_32:
997
      /* Check transition from {IE_32,GOTIE} access model:
998
    subl foo@{tpoff,gontoff}(%reg1), %reg2
999
    movl foo@{tpoff,gontoff}(%reg1), %reg2
1000
    addl foo@{tpoff,gontoff}(%reg1), %reg2
1001
       */
1002
1003
0
      if (offset < 2 || (offset + 4) > sec->size)
1004
0
  return false;
1005
1006
0
      val = bfd_get_8 (abfd, contents + offset - 1);
1007
0
      if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1008
0
  return false;
1009
1010
0
      type = bfd_get_8 (abfd, contents + offset - 2);
1011
0
      return type == 0x8b || type == 0x2b || type == 0x03;
1012
1013
0
    case R_386_TLS_GOTDESC:
1014
      /* Check transition from GDesc access model:
1015
    leal x@tlsdesc(%ebx), %eax
1016
1017
   Make sure it's a leal adding ebx to a 32-bit offset
1018
   into any register, although it's probably almost always
1019
   going to be eax.  */
1020
1021
0
      if (offset < 2 || (offset + 4) > sec->size)
1022
0
  return false;
1023
1024
0
      if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1025
0
  return false;
1026
1027
0
      val = bfd_get_8 (abfd, contents + offset - 1);
1028
0
      return (val & 0xc7) == 0x83;
1029
1030
0
    case R_386_TLS_DESC_CALL:
1031
      /* Check transition from GDesc access model:
1032
    call *x@tlsdesc(%eax)
1033
       */
1034
0
      if (offset + 2 <= sec->size)
1035
0
  {
1036
    /* Make sure that it's a call *x@tlsdesc(%eax).  */
1037
0
    call = contents + offset;
1038
0
    return call[0] == 0xff && call[1] == 0x10;
1039
0
  }
1040
1041
0
      return false;
1042
1043
0
    default:
1044
0
      abort ();
1045
0
    }
1046
0
}
1047
1048
/* Return TRUE if the TLS access transition is OK or no transition
1049
   will be performed.  Update R_TYPE if there is a transition.  */
1050
1051
static bool
1052
elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1053
       asection *sec, bfd_byte *contents,
1054
       Elf_Internal_Shdr *symtab_hdr,
1055
       struct elf_link_hash_entry **sym_hashes,
1056
       unsigned int *r_type, int tls_type,
1057
       const Elf_Internal_Rela *rel,
1058
       const Elf_Internal_Rela *relend,
1059
       struct elf_link_hash_entry *h,
1060
       unsigned long r_symndx,
1061
       bool from_relocate_section)
1062
0
{
1063
0
  unsigned int from_type = *r_type;
1064
0
  unsigned int to_type = from_type;
1065
0
  bool check = true;
1066
0
  unsigned int to_le_type, to_ie_type;
1067
1068
  /* Skip TLS transition for functions.  */
1069
0
  if (h != NULL
1070
0
      && (h->type == STT_FUNC
1071
0
    || h->type == STT_GNU_IFUNC))
1072
0
    return true;
1073
1074
0
  if (get_elf_backend_data (abfd)->target_os == is_solaris)
1075
0
    {
1076
      /* NB: Solaris only supports R_386_TLS_LE and R_386_TLS_IE.  */
1077
0
      to_le_type = R_386_TLS_LE;
1078
0
      to_ie_type = R_386_TLS_IE;
1079
0
    }
1080
0
  else
1081
0
    {
1082
0
      to_le_type = R_386_TLS_LE_32;
1083
0
      to_ie_type = R_386_TLS_IE_32;
1084
0
    }
1085
1086
0
  switch (from_type)
1087
0
    {
1088
0
    case R_386_TLS_GD:
1089
0
    case R_386_TLS_GOTDESC:
1090
0
    case R_386_TLS_DESC_CALL:
1091
0
    case R_386_TLS_IE_32:
1092
0
    case R_386_TLS_IE:
1093
0
    case R_386_TLS_GOTIE:
1094
0
      if (bfd_link_executable (info))
1095
0
  {
1096
0
    if (h == NULL)
1097
0
      to_type = to_le_type;
1098
0
    else if (from_type != R_386_TLS_IE
1099
0
       && from_type != R_386_TLS_GOTIE)
1100
0
      to_type = to_ie_type;
1101
0
  }
1102
1103
      /* When we are called from elf_i386_relocate_section, there may
1104
   be additional transitions based on TLS_TYPE.  */
1105
0
      if (from_relocate_section)
1106
0
  {
1107
0
    unsigned int new_to_type = to_type;
1108
1109
0
    if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type))
1110
0
      new_to_type = to_le_type;
1111
1112
0
    if (to_type == R_386_TLS_GD
1113
0
        || to_type == R_386_TLS_GOTDESC
1114
0
        || to_type == R_386_TLS_DESC_CALL)
1115
0
      {
1116
0
        if (tls_type == GOT_TLS_IE_POS)
1117
0
    new_to_type = R_386_TLS_GOTIE;
1118
0
        else if (tls_type & GOT_TLS_IE)
1119
0
    new_to_type = to_ie_type;
1120
0
      }
1121
1122
    /* We checked the transition before when we were called from
1123
       elf_i386_scan_relocs.  We only want to check the new
1124
       transition which hasn't been checked before.  */
1125
0
    check = new_to_type != to_type && from_type == to_type;
1126
0
    to_type = new_to_type;
1127
0
  }
1128
1129
0
      break;
1130
1131
0
    case R_386_TLS_LDM:
1132
0
      if (bfd_link_executable (info))
1133
0
  to_type = to_le_type;
1134
0
      break;
1135
1136
0
    default:
1137
0
      return true;
1138
0
    }
1139
1140
  /* Return TRUE if there is no transition.  */
1141
0
  if (from_type == to_type)
1142
0
    return true;
1143
1144
  /* Check if the transition can be performed.  */
1145
0
  if (check
1146
0
      && ! elf_i386_check_tls_transition (sec, contents,
1147
0
            symtab_hdr, sym_hashes,
1148
0
            from_type, rel, relend))
1149
0
    {
1150
0
      reloc_howto_type *from, *to;
1151
0
      const char *name;
1152
1153
0
      from = elf_i386_rtype_to_howto (from_type);
1154
0
      to = elf_i386_rtype_to_howto (to_type);
1155
1156
0
      if (h)
1157
0
  name = h->root.root.string;
1158
0
      else
1159
0
  {
1160
0
    struct elf_x86_link_hash_table *htab;
1161
1162
0
    htab = elf_x86_hash_table (info, I386_ELF_DATA);
1163
0
    if (htab == NULL)
1164
0
      name = "*unknown*";
1165
0
    else
1166
0
      {
1167
0
        Elf_Internal_Sym *isym;
1168
1169
0
        isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1170
0
              abfd, r_symndx);
1171
0
        name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1172
0
      }
1173
0
  }
1174
1175
0
      _bfd_error_handler
1176
  /* xgettext:c-format */
1177
0
  (_("%pB: TLS transition from %s to %s against `%s'"
1178
0
     " at %#" PRIx64 " in section `%pA' failed"),
1179
0
   abfd, from->name, to->name, name,
1180
0
   (uint64_t) rel->r_offset, sec);
1181
0
      bfd_set_error (bfd_error_bad_value);
1182
0
      return false;
1183
0
    }
1184
1185
0
  *r_type = to_type;
1186
0
  return true;
1187
0
}
1188
1189
/* With the local symbol, foo, we convert
1190
   mov foo@GOT[(%reg1)], %reg2
1191
   to
1192
   lea foo[@GOTOFF(%reg1)], %reg2
1193
   and convert
1194
   call/jmp *foo@GOT[(%reg)]
1195
   to
1196
   nop call foo/jmp foo nop
1197
   When PIC is false, convert
1198
   test %reg1, foo@GOT[(%reg2)]
1199
   to
1200
   test $foo, %reg1
1201
   and convert
1202
   binop foo@GOT[(%reg1)], %reg2
1203
   to
1204
   binop $foo, %reg2
1205
   where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1206
   instructions.  */
1207
1208
static
1209
bool
1210
elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1211
           bfd_byte *contents,
1212
           unsigned int *r_type_p,
1213
           Elf_Internal_Rela *irel,
1214
           struct elf_link_hash_entry *h,
1215
           bool *converted,
1216
           struct bfd_link_info *link_info)
1217
0
{
1218
0
  struct elf_x86_link_hash_table *htab;
1219
0
  unsigned int opcode;
1220
0
  unsigned int modrm;
1221
0
  bool baseless;
1222
0
  Elf_Internal_Sym *isym;
1223
0
  unsigned int addend;
1224
0
  unsigned int nop;
1225
0
  bfd_vma nop_offset;
1226
0
  bool is_pic;
1227
0
  bool to_reloc_32;
1228
0
  bool abs_symbol;
1229
0
  unsigned int r_type;
1230
0
  unsigned int r_symndx;
1231
0
  bfd_vma roff = irel->r_offset;
1232
0
  bool local_ref;
1233
0
  struct elf_x86_link_hash_entry *eh;
1234
1235
0
  if (roff < 2)
1236
0
    return true;
1237
1238
  /* Addend for R_386_GOT32X relocations must be 0.  */
1239
0
  addend = bfd_get_32 (abfd, contents + roff);
1240
0
  if (addend != 0)
1241
0
    return true;
1242
1243
0
  htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1244
0
  is_pic = bfd_link_pic (link_info);
1245
1246
0
  r_type = *r_type_p;
1247
0
  r_symndx = ELF32_R_SYM (irel->r_info);
1248
1249
0
  modrm = bfd_get_8 (abfd, contents + roff - 1);
1250
0
  baseless = (modrm & 0xc7) == 0x5;
1251
1252
0
  if (h)
1253
0
    {
1254
      /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P.  */
1255
0
      local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
1256
0
      isym = NULL;
1257
0
      abs_symbol = ABS_SYMBOL_P (h);
1258
0
    }
1259
0
  else
1260
0
    {
1261
0
      local_ref = true;
1262
0
      isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd,
1263
0
            r_symndx);
1264
0
      abs_symbol = isym->st_shndx == SHN_ABS;
1265
0
    }
1266
1267
0
  if (baseless && is_pic)
1268
0
    {
1269
      /* For PIC, disallow R_386_GOT32X without a base register
1270
   since we don't know what the GOT base is.  */
1271
0
      const char *name;
1272
1273
0
      if (h == NULL)
1274
0
  name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1275
0
      else
1276
0
  name = h->root.root.string;
1277
1278
0
      _bfd_error_handler
1279
  /* xgettext:c-format */
1280
0
  (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
1281
0
     " register can not be used when making a shared object"),
1282
0
   abfd, name);
1283
0
      return false;
1284
0
    }
1285
1286
0
  opcode = bfd_get_8 (abfd, contents + roff - 2);
1287
1288
  /* Convert to R_386_32 if PIC is false or there is no base
1289
     register.  */
1290
0
  to_reloc_32 = !is_pic || baseless;
1291
1292
0
  eh = elf_x86_hash_entry (h);
1293
1294
  /* Try to convert R_386_GOT32X.  Get the symbol referred to by the
1295
     reloc.  */
1296
0
  if (h == NULL)
1297
0
    {
1298
0
      if (opcode == 0x0ff)
1299
  /* Convert "call/jmp *foo@GOT[(%reg)]".  */
1300
0
  goto convert_branch;
1301
0
      else
1302
  /* Convert "mov foo@GOT[(%reg1)], %reg2",
1303
     "test %reg1, foo@GOT(%reg2)" and
1304
     "binop foo@GOT[(%reg1)], %reg2". */
1305
0
  goto convert_load;
1306
0
    }
1307
1308
  /* Undefined weak symbol is only bound locally in executable
1309
     and its reference is resolved as 0.  */
1310
0
  if (h->root.type == bfd_link_hash_undefweak
1311
0
      && !eh->linker_def
1312
0
      && local_ref)
1313
0
    {
1314
0
      if (opcode == 0xff)
1315
0
  {
1316
    /* No direct branch to 0 for PIC.  */
1317
0
    if (is_pic)
1318
0
      return true;
1319
0
    else
1320
0
      goto convert_branch;
1321
0
  }
1322
0
      else
1323
0
  {
1324
    /* We can convert load of address 0 to R_386_32.  */
1325
0
    to_reloc_32 = true;
1326
0
    goto convert_load;
1327
0
  }
1328
0
    }
1329
1330
0
  if (opcode == 0xff)
1331
0
    {
1332
      /* We have "call/jmp *foo@GOT[(%reg)]".  */
1333
0
      if ((h->root.type == bfd_link_hash_defined
1334
0
     || h->root.type == bfd_link_hash_defweak)
1335
0
    && local_ref)
1336
0
  {
1337
    /* The function is locally defined.   */
1338
0
  convert_branch:
1339
    /* Convert R_386_GOT32X to R_386_PC32.  */
1340
0
    if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1341
0
      {
1342
        /* Convert to "nop call foo".  ADDR_PREFIX_OPCODE
1343
     is a nop prefix.  */
1344
0
        modrm = 0xe8;
1345
        /* To support TLS optimization, always use addr32 prefix
1346
     for "call *___tls_get_addr@GOT(%reg)".  */
1347
0
        if (eh && eh->tls_get_addr)
1348
0
    {
1349
0
      nop = 0x67;
1350
0
      nop_offset = irel->r_offset - 2;
1351
0
    }
1352
0
        else
1353
0
    {
1354
0
      nop = htab->params->call_nop_byte;
1355
0
      if (htab->params->call_nop_as_suffix)
1356
0
        {
1357
0
          nop_offset = roff + 3;
1358
0
          irel->r_offset -= 1;
1359
0
        }
1360
0
      else
1361
0
        nop_offset = roff - 2;
1362
0
    }
1363
0
      }
1364
0
    else
1365
0
      {
1366
        /* Convert to "jmp foo nop".  */
1367
0
        modrm = 0xe9;
1368
0
        nop = NOP_OPCODE;
1369
0
        nop_offset = roff + 3;
1370
0
        irel->r_offset -= 1;
1371
0
      }
1372
1373
0
    bfd_put_8 (abfd, nop, contents + nop_offset);
1374
0
    bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1375
    /* When converting to PC-relative relocation, we
1376
       need to adjust addend by -4.  */
1377
0
    bfd_put_32 (abfd, -4, contents + irel->r_offset);
1378
0
    irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1379
0
    *r_type_p = R_386_PC32;
1380
0
    *converted = true;
1381
0
  }
1382
0
    }
1383
0
  else
1384
0
    {
1385
      /* We have "mov foo@GOT[(%re1g)], %reg2",
1386
   "test %reg1, foo@GOT(%reg2)" and
1387
   "binop foo@GOT[(%reg1)], %reg2".
1388
1389
   Avoid optimizing _DYNAMIC since ld.so may use its
1390
   link-time address.  */
1391
0
      if (h == htab->elf.hdynamic)
1392
0
  return true;
1393
1394
      /* def_regular is set by an assignment in a linker script in
1395
   bfd_elf_record_link_assignment.  start_stop is set on
1396
   __start_SECNAME/__stop_SECNAME which mark section SECNAME.  */
1397
0
      if (h->start_stop
1398
0
    || eh->linker_def
1399
0
    || ((h->def_regular
1400
0
         || h->root.type == bfd_link_hash_defined
1401
0
         || h->root.type == bfd_link_hash_defweak)
1402
0
        && local_ref))
1403
0
  {
1404
0
  convert_load:
1405
0
    if (opcode == 0x8b)
1406
0
      {
1407
0
        if (abs_symbol && local_ref)
1408
0
    to_reloc_32 = true;
1409
1410
0
        if (to_reloc_32)
1411
0
    {
1412
      /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1413
         "mov $foo, %reg2" with R_386_32.  */
1414
0
      r_type = R_386_32;
1415
0
      modrm = 0xc0 | (modrm & 0x38) >> 3;
1416
0
      bfd_put_8 (abfd, modrm, contents + roff - 1);
1417
0
      opcode = 0xc7;
1418
0
    }
1419
0
        else
1420
0
    {
1421
      /* Convert "mov foo@GOT(%reg1), %reg2" to
1422
         "lea foo@GOTOFF(%reg1), %reg2".  */
1423
0
      r_type = R_386_GOTOFF;
1424
0
      opcode = 0x8d;
1425
0
    }
1426
0
      }
1427
0
    else
1428
0
      {
1429
        /* Only R_386_32 is supported.  */
1430
0
        if (!to_reloc_32)
1431
0
    return true;
1432
1433
0
        if (opcode == 0x85)
1434
0
    {
1435
      /* Convert "test %reg1, foo@GOT(%reg2)" to
1436
         "test $foo, %reg1".  */
1437
0
      modrm = 0xc0 | (modrm & 0x38) >> 3;
1438
0
      opcode = 0xf7;
1439
0
    }
1440
0
        else
1441
0
    {
1442
      /* Convert "binop foo@GOT(%reg1), %reg2" to
1443
         "binop $foo, %reg2".  */
1444
0
      modrm = (0xc0
1445
0
         | (modrm & 0x38) >> 3
1446
0
         | (opcode & 0x3c));
1447
0
      opcode = 0x81;
1448
0
    }
1449
0
        bfd_put_8 (abfd, modrm, contents + roff - 1);
1450
0
        r_type = R_386_32;
1451
0
      }
1452
1453
0
    bfd_put_8 (abfd, opcode, contents + roff - 2);
1454
0
    irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1455
0
    *r_type_p = r_type;
1456
0
    *converted = true;
1457
0
  }
1458
0
    }
1459
1460
0
  return true;
1461
0
}
1462
1463
/* Look through the relocs for a section during the first phase, and
1464
   calculate needed space in the global offset table, and procedure
1465
   linkage table.  */
1466
1467
static bool
1468
elf_i386_scan_relocs (bfd *abfd,
1469
          struct bfd_link_info *info,
1470
          asection *sec,
1471
          const Elf_Internal_Rela *relocs)
1472
0
{
1473
0
  struct elf_x86_link_hash_table *htab;
1474
0
  Elf_Internal_Shdr *symtab_hdr;
1475
0
  struct elf_link_hash_entry **sym_hashes;
1476
0
  const Elf_Internal_Rela *rel;
1477
0
  const Elf_Internal_Rela *rel_end;
1478
0
  bfd_byte *contents;
1479
0
  bool converted;
1480
1481
0
  if (bfd_link_relocatable (info))
1482
0
    return true;
1483
1484
0
  htab = elf_x86_hash_table (info, I386_ELF_DATA);
1485
0
  if (htab == NULL)
1486
0
    {
1487
0
      sec->check_relocs_failed = 1;
1488
0
      return false;
1489
0
    }
1490
1491
0
  BFD_ASSERT (is_x86_elf (abfd, htab));
1492
1493
  /* Get the section contents.  */
1494
0
  if (elf_section_data (sec)->this_hdr.contents != NULL)
1495
0
    contents = elf_section_data (sec)->this_hdr.contents;
1496
0
  else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1497
0
    {
1498
0
      sec->check_relocs_failed = 1;
1499
0
      return false;
1500
0
    }
1501
1502
0
  symtab_hdr = &elf_symtab_hdr (abfd);
1503
0
  sym_hashes = elf_sym_hashes (abfd);
1504
1505
0
  converted = false;
1506
1507
0
  rel_end = relocs + sec->reloc_count;
1508
0
  for (rel = relocs; rel < rel_end; rel++)
1509
0
    {
1510
0
      unsigned int r_type;
1511
0
      unsigned int r_symndx;
1512
0
      struct elf_link_hash_entry *h;
1513
0
      struct elf_x86_link_hash_entry *eh;
1514
0
      Elf_Internal_Sym *isym;
1515
0
      const char *name;
1516
0
      bool size_reloc;
1517
0
      bool no_dynreloc;
1518
1519
0
      r_symndx = ELF32_R_SYM (rel->r_info);
1520
0
      r_type = ELF32_R_TYPE (rel->r_info);
1521
1522
0
      if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1523
0
  {
1524
    /* xgettext:c-format */
1525
0
    _bfd_error_handler (_("%pB: bad symbol index: %d"),
1526
0
            abfd, r_symndx);
1527
0
    goto error_return;
1528
0
  }
1529
1530
0
      if (r_symndx < symtab_hdr->sh_info)
1531
0
  {
1532
    /* A local symbol.  */
1533
0
    isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1534
0
          abfd, r_symndx);
1535
0
    if (isym == NULL)
1536
0
      goto error_return;
1537
1538
    /* Check relocation against local STT_GNU_IFUNC symbol.  */
1539
0
    if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1540
0
      {
1541
0
        h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, true);
1542
0
        if (h == NULL)
1543
0
    goto error_return;
1544
1545
        /* Fake a STT_GNU_IFUNC symbol.  */
1546
0
        h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1547
0
                  isym, NULL);
1548
0
        h->type = STT_GNU_IFUNC;
1549
0
        h->def_regular = 1;
1550
0
        h->ref_regular = 1;
1551
0
        h->forced_local = 1;
1552
0
        h->root.type = bfd_link_hash_defined;
1553
0
      }
1554
0
    else
1555
0
      h = NULL;
1556
0
  }
1557
0
      else
1558
0
  {
1559
0
    isym = NULL;
1560
0
    h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1561
0
    while (h->root.type == bfd_link_hash_indirect
1562
0
     || h->root.type == bfd_link_hash_warning)
1563
0
      h = (struct elf_link_hash_entry *) h->root.u.i.link;
1564
0
  }
1565
1566
0
      eh = (struct elf_x86_link_hash_entry *) h;
1567
0
      if (h != NULL)
1568
0
  {
1569
0
    if (r_type == R_386_GOTOFF)
1570
0
      eh->gotoff_ref = 1;
1571
1572
    /* It is referenced by a non-shared object. */
1573
0
    h->ref_regular = 1;
1574
0
  }
1575
1576
0
      if (r_type == R_386_GOT32X
1577
0
    && (h == NULL || h->type != STT_GNU_IFUNC))
1578
0
  {
1579
0
    Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
1580
0
    if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
1581
0
              &r_type, irel, h,
1582
0
              &converted, info))
1583
0
      goto error_return;
1584
0
  }
1585
1586
0
      if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym,
1587
0
               symtab_hdr, &no_dynreloc))
1588
0
  return false;
1589
1590
0
      if (! elf_i386_tls_transition (info, abfd, sec, contents,
1591
0
             symtab_hdr, sym_hashes,
1592
0
             &r_type, GOT_UNKNOWN,
1593
0
             rel, rel_end, h, r_symndx, false))
1594
0
  goto error_return;
1595
1596
      /* Check if _GLOBAL_OFFSET_TABLE_ is referenced.  */
1597
0
      if (h == htab->elf.hgot)
1598
0
  htab->got_referenced = true;
1599
1600
0
      switch (r_type)
1601
0
  {
1602
0
  case R_386_TLS_LDM:
1603
0
    htab->tls_ld_or_ldm_got.refcount = 1;
1604
0
    goto create_got;
1605
1606
0
  case R_386_PLT32:
1607
    /* This symbol requires a procedure linkage table entry.  We
1608
       actually build the entry in adjust_dynamic_symbol,
1609
       because this might be a case of linking PIC code which is
1610
       never referenced by a dynamic object, in which case we
1611
       don't need to generate a procedure linkage table entry
1612
       after all.  */
1613
1614
    /* If this is a local symbol, we resolve it directly without
1615
       creating a procedure linkage table entry.  */
1616
0
    if (h == NULL)
1617
0
      continue;
1618
1619
0
    eh->zero_undefweak &= 0x2;
1620
0
    h->needs_plt = 1;
1621
0
    h->plt.refcount = 1;
1622
0
    break;
1623
1624
0
  case R_386_SIZE32:
1625
0
    size_reloc = true;
1626
0
    goto do_size;
1627
1628
0
  case R_386_TLS_IE_32:
1629
0
  case R_386_TLS_IE:
1630
0
  case R_386_TLS_GOTIE:
1631
0
    if (!bfd_link_executable (info))
1632
0
      info->flags |= DF_STATIC_TLS;
1633
    /* Fall through */
1634
1635
0
  case R_386_GOT32:
1636
0
  case R_386_GOT32X:
1637
0
  case R_386_TLS_GD:
1638
0
  case R_386_TLS_GOTDESC:
1639
0
  case R_386_TLS_DESC_CALL:
1640
    /* This symbol requires a global offset table entry.  */
1641
0
    {
1642
0
      int tls_type, old_tls_type;
1643
1644
0
      switch (r_type)
1645
0
        {
1646
0
        default:
1647
0
        case R_386_GOT32:
1648
0
        case R_386_GOT32X:
1649
0
    tls_type = GOT_NORMAL;
1650
0
    break;
1651
0
        case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1652
0
        case R_386_TLS_GOTDESC:
1653
0
        case R_386_TLS_DESC_CALL:
1654
0
    tls_type = GOT_TLS_GDESC; break;
1655
0
        case R_386_TLS_IE_32:
1656
0
    if (ELF32_R_TYPE (rel->r_info) == r_type)
1657
0
      tls_type = GOT_TLS_IE_NEG;
1658
0
    else
1659
      /* If this is a GD->IE transition, we may use either of
1660
         R_386_TLS_TPOFF and R_386_TLS_TPOFF32.  */
1661
0
      tls_type = GOT_TLS_IE;
1662
0
    break;
1663
0
        case R_386_TLS_IE:
1664
0
        case R_386_TLS_GOTIE:
1665
0
    tls_type = GOT_TLS_IE_POS; break;
1666
0
        }
1667
1668
0
      if (h != NULL)
1669
0
        {
1670
0
    h->got.refcount = 1;
1671
0
    old_tls_type = elf_x86_hash_entry (h)->tls_type;
1672
0
        }
1673
0
      else
1674
0
        {
1675
0
    bfd_signed_vma *local_got_refcounts;
1676
1677
0
    if (!elf_x86_allocate_local_got_info (abfd,
1678
0
                  symtab_hdr->sh_info))
1679
0
          goto error_return;
1680
1681
    /* This is a global offset table entry for a local symbol.  */
1682
0
    local_got_refcounts = elf_local_got_refcounts (abfd);
1683
0
    local_got_refcounts[r_symndx] = 1;
1684
0
    old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1685
0
        }
1686
1687
0
      if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1688
0
        tls_type |= old_tls_type;
1689
      /* If a TLS symbol is accessed using IE at least once,
1690
         there is no point to use dynamic model for it.  */
1691
0
      else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1692
0
         && (! GOT_TLS_GD_ANY_P (old_tls_type)
1693
0
       || (tls_type & GOT_TLS_IE) == 0))
1694
0
        {
1695
0
    if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1696
0
      tls_type = old_tls_type;
1697
0
    else if (GOT_TLS_GD_ANY_P (old_tls_type)
1698
0
       && GOT_TLS_GD_ANY_P (tls_type))
1699
0
      tls_type |= old_tls_type;
1700
0
    else
1701
0
      {
1702
0
        if (h)
1703
0
          name = h->root.root.string;
1704
0
        else
1705
0
          name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1706
0
               NULL);
1707
0
        _bfd_error_handler
1708
          /* xgettext:c-format */
1709
0
          (_("%pB: `%s' accessed both as normal and "
1710
0
       "thread local symbol"),
1711
0
           abfd, name);
1712
0
        bfd_set_error (bfd_error_bad_value);
1713
0
        goto error_return;
1714
0
      }
1715
0
        }
1716
1717
0
      if (old_tls_type != tls_type)
1718
0
        {
1719
0
    if (h != NULL)
1720
0
      elf_x86_hash_entry (h)->tls_type = tls_type;
1721
0
    else
1722
0
      elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1723
0
        }
1724
0
    }
1725
    /* Fall through */
1726
1727
0
  case R_386_GOTOFF:
1728
0
  case R_386_GOTPC:
1729
0
  create_got:
1730
0
    if (r_type != R_386_TLS_IE)
1731
0
      {
1732
0
        if (eh != NULL)
1733
0
    {
1734
0
      eh->zero_undefweak &= 0x2;
1735
1736
      /* Need GOT to resolve undefined weak symbol to 0.  */
1737
0
      if (r_type == R_386_GOTOFF
1738
0
          && h->root.type == bfd_link_hash_undefweak
1739
0
          && bfd_link_executable (info))
1740
0
        htab->got_referenced = true;
1741
0
    }
1742
0
        break;
1743
0
      }
1744
    /* Fall through */
1745
1746
0
  case R_386_TLS_LE_32:
1747
0
  case R_386_TLS_LE:
1748
0
    if (eh != NULL)
1749
0
      eh->zero_undefweak &= 0x2;
1750
0
    if (bfd_link_executable (info))
1751
0
      break;
1752
0
    info->flags |= DF_STATIC_TLS;
1753
0
    goto do_relocation;
1754
1755
0
  case R_386_32:
1756
0
  case R_386_PC32:
1757
0
    if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1758
0
      eh->zero_undefweak |= 0x2;
1759
0
  do_relocation:
1760
    /* We are called after all symbols have been resolved.  Only
1761
       relocation against STT_GNU_IFUNC symbol must go through
1762
       PLT.  */
1763
0
    if (h != NULL
1764
0
        && (bfd_link_executable (info)
1765
0
      || h->type == STT_GNU_IFUNC))
1766
0
      {
1767
0
        bool func_pointer_ref = false;
1768
1769
0
        if (r_type == R_386_PC32)
1770
0
    {
1771
      /* Since something like ".long foo - ." may be used
1772
         as pointer, make sure that PLT is used if foo is
1773
         a function defined in a shared library.  */
1774
0
      if ((sec->flags & SEC_CODE) == 0)
1775
0
        h->pointer_equality_needed = 1;
1776
0
      else if (h->type == STT_GNU_IFUNC
1777
0
         && bfd_link_pic (info))
1778
0
        {
1779
0
          _bfd_error_handler
1780
      /* xgettext:c-format */
1781
0
      (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
1782
0
       abfd, h->root.root.string);
1783
0
          bfd_set_error (bfd_error_bad_value);
1784
0
          goto error_return;
1785
0
        }
1786
0
    }
1787
0
        else
1788
0
    {
1789
      /* R_386_32 can be resolved at run-time.  Function
1790
         pointer reference doesn't need PLT for pointer
1791
         equality.  */
1792
0
      if (r_type == R_386_32
1793
0
          && (sec->flags & SEC_READONLY) == 0)
1794
0
        func_pointer_ref = true;
1795
1796
      /* IFUNC symbol needs pointer equality in PDE so that
1797
         function pointer reference will be resolved to its
1798
         PLT entry directly.  */
1799
0
      if (!func_pointer_ref
1800
0
          || (bfd_link_pde (info)
1801
0
        && h->type == STT_GNU_IFUNC))
1802
0
        h->pointer_equality_needed = 1;
1803
0
    }
1804
1805
0
        if (!func_pointer_ref)
1806
0
    {
1807
      /* If this reloc is in a read-only section, we might
1808
         need a copy reloc.  We can't check reliably at this
1809
         stage whether the section is read-only, as input
1810
         sections have not yet been mapped to output sections.
1811
         Tentatively set the flag for now, and correct in
1812
         adjust_dynamic_symbol.  */
1813
0
      h->non_got_ref = 1;
1814
1815
0
      if (!elf_has_indirect_extern_access (sec->owner))
1816
0
        eh->non_got_ref_without_indirect_extern_access = 1;
1817
1818
      /* We may need a .plt entry if the symbol is a function
1819
         defined in a shared lib or is a function referenced
1820
         from the code or read-only section.  */
1821
0
      if (!h->def_regular
1822
0
          || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1823
0
        h->plt.refcount = 1;
1824
1825
0
      if (htab->elf.target_os != is_solaris
1826
0
          && h->pointer_equality_needed
1827
0
          && h->type == STT_FUNC
1828
0
          && eh->def_protected
1829
0
          && !SYMBOL_DEFINED_NON_SHARED_P (h)
1830
0
          && h->def_dynamic)
1831
0
        {
1832
          /* Disallow non-canonical reference to canonical
1833
       protected function.  */
1834
0
          _bfd_error_handler
1835
      /* xgettext:c-format */
1836
0
      (_("%pB: non-canonical reference to canonical "
1837
0
         "protected function `%s' in %pB"),
1838
0
       abfd, h->root.root.string,
1839
0
       h->root.u.def.section->owner);
1840
0
          bfd_set_error (bfd_error_bad_value);
1841
0
          goto error_return;
1842
0
        }
1843
0
    }
1844
0
      }
1845
1846
0
    size_reloc = false;
1847
0
  do_size:
1848
0
    if (!no_dynreloc
1849
0
        && NEED_DYNAMIC_RELOCATION_P (false, info, false, h, sec,
1850
0
              r_type, R_386_32))
1851
0
      {
1852
0
        struct elf_dyn_relocs *p;
1853
0
        struct elf_dyn_relocs **head;
1854
1855
        /* If this is a global symbol, we count the number of
1856
     relocations we need for this symbol.  */
1857
0
        if (h != NULL)
1858
0
    {
1859
0
      head = &h->dyn_relocs;
1860
0
    }
1861
0
        else
1862
0
    {
1863
      /* Track dynamic relocs needed for local syms too.
1864
         We really need local syms available to do this
1865
         easily.  Oh well.  */
1866
0
      void **vpp;
1867
0
      asection *s;
1868
1869
0
      isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1870
0
            abfd, r_symndx);
1871
0
      if (isym == NULL)
1872
0
        goto error_return;
1873
1874
0
      s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1875
0
      if (s == NULL)
1876
0
        s = sec;
1877
1878
0
      vpp = &elf_section_data (s)->local_dynrel;
1879
0
      head = (struct elf_dyn_relocs **)vpp;
1880
0
    }
1881
1882
0
        p = *head;
1883
0
        if (p == NULL || p->sec != sec)
1884
0
    {
1885
0
      size_t amt = sizeof *p;
1886
0
      p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1887
0
                 amt);
1888
0
      if (p == NULL)
1889
0
        goto error_return;
1890
0
      p->next = *head;
1891
0
      *head = p;
1892
0
      p->sec = sec;
1893
0
      p->count = 0;
1894
0
      p->pc_count = 0;
1895
0
    }
1896
1897
0
        p->count += 1;
1898
        /* Count size relocation as PC-relative relocation.  */
1899
0
        if (r_type == R_386_PC32 || size_reloc)
1900
0
    p->pc_count += 1;
1901
0
      }
1902
0
    break;
1903
1904
    /* This relocation describes the C++ object vtable hierarchy.
1905
       Reconstruct it for later use during GC.  */
1906
0
  case R_386_GNU_VTINHERIT:
1907
0
    if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1908
0
      goto error_return;
1909
0
    break;
1910
1911
    /* This relocation describes which C++ vtable entries are actually
1912
       used.  Record for later use during GC.  */
1913
0
  case R_386_GNU_VTENTRY:
1914
0
    if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1915
0
      goto error_return;
1916
0
    break;
1917
1918
0
  default:
1919
0
    break;
1920
0
  }
1921
0
    }
1922
1923
0
  if (elf_section_data (sec)->this_hdr.contents != contents)
1924
0
    {
1925
0
      if (!converted && !_bfd_link_keep_memory (info))
1926
0
  free (contents);
1927
0
      else
1928
0
  {
1929
    /* Cache the section contents for elf_link_input_bfd if any
1930
       load is converted or --no-keep-memory isn't used.  */
1931
0
    elf_section_data (sec)->this_hdr.contents = contents;
1932
0
    info->cache_size += sec->size;
1933
0
  }
1934
0
    }
1935
1936
  /* Cache relocations if any load is converted.  */
1937
0
  if (elf_section_data (sec)->relocs != relocs && converted)
1938
0
    elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
1939
1940
0
  return true;
1941
1942
0
 error_return:
1943
0
  if (elf_section_data (sec)->this_hdr.contents != contents)
1944
0
    free (contents);
1945
0
  sec->check_relocs_failed = 1;
1946
0
  return false;
1947
0
}
1948
1949
static bool
1950
elf_i386_always_size_sections (bfd *output_bfd,
1951
             struct bfd_link_info *info)
1952
0
{
1953
0
  bfd *abfd;
1954
1955
  /* Scan relocations after rel_from_abs has been set on __ehdr_start.  */
1956
0
  for (abfd = info->input_bfds;
1957
0
       abfd != (bfd *) NULL;
1958
0
       abfd = abfd->link.next)
1959
0
    if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1960
0
  && !_bfd_elf_link_iterate_on_relocs (abfd, info,
1961
0
               elf_i386_scan_relocs))
1962
0
      return false;
1963
1964
0
  return _bfd_x86_elf_always_size_sections (output_bfd, info);
1965
0
}
1966
1967
/* Set the correct type for an x86 ELF section.  We do this by the
1968
   section name, which is a hack, but ought to work.  */
1969
1970
static bool
1971
elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1972
      Elf_Internal_Shdr *hdr,
1973
      asection *sec)
1974
155
{
1975
155
  const char *name;
1976
1977
155
  name = bfd_section_name (sec);
1978
1979
  /* This is an ugly, but unfortunately necessary hack that is
1980
     needed when producing EFI binaries on x86. It tells
1981
     elf.c:elf_fake_sections() not to consider ".reloc" as a section
1982
     containing ELF relocation info.  We need this hack in order to
1983
     be able to generate ELF binaries that can be translated into
1984
     EFI applications (which are essentially COFF objects).  Those
1985
     files contain a COFF ".reloc" section inside an ELFNN object,
1986
     which would normally cause BFD to segfault because it would
1987
     attempt to interpret this section as containing relocation
1988
     entries for section "oc".  With this hack enabled, ".reloc"
1989
     will be treated as a normal data section, which will avoid the
1990
     segfault.  However, you won't be able to create an ELFNN binary
1991
     with a section named "oc" that needs relocations, but that's
1992
     the kind of ugly side-effects you get when detecting section
1993
     types based on their names...  In practice, this limitation is
1994
     unlikely to bite.  */
1995
155
  if (strcmp (name, ".reloc") == 0)
1996
0
    hdr->sh_type = SHT_PROGBITS;
1997
1998
155
  return true;
1999
155
}
2000
2001
/* Return the relocation value for @tpoff relocation
2002
   if STT_TLS virtual address is ADDRESS.  */
2003
2004
static bfd_vma
2005
elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2006
0
{
2007
0
  struct elf_link_hash_table *htab = elf_hash_table (info);
2008
0
  const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2009
0
  bfd_vma static_tls_size;
2010
2011
  /* If tls_sec is NULL, we should have signalled an error already.  */
2012
0
  if (htab->tls_sec == NULL)
2013
0
    return 0;
2014
2015
  /* Consider special static TLS alignment requirements.  */
2016
0
  static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2017
0
  return static_tls_size + htab->tls_sec->vma - address;
2018
0
}
2019
2020
/* Relocate an i386 ELF section.  */
2021
2022
static int
2023
elf_i386_relocate_section (bfd *output_bfd,
2024
         struct bfd_link_info *info,
2025
         bfd *input_bfd,
2026
         asection *input_section,
2027
         bfd_byte *contents,
2028
         Elf_Internal_Rela *relocs,
2029
         Elf_Internal_Sym *local_syms,
2030
         asection **local_sections)
2031
0
{
2032
0
  struct elf_x86_link_hash_table *htab;
2033
0
  Elf_Internal_Shdr *symtab_hdr;
2034
0
  struct elf_link_hash_entry **sym_hashes;
2035
0
  bfd_vma *local_got_offsets;
2036
0
  bfd_vma *local_tlsdesc_gotents;
2037
0
  Elf_Internal_Rela *rel;
2038
0
  Elf_Internal_Rela *wrel;
2039
0
  Elf_Internal_Rela *relend;
2040
0
  bool is_vxworks_tls;
2041
0
  unsigned expected_tls_le;
2042
0
  unsigned plt_entry_size;
2043
2044
  /* Skip if check_relocs or scan_relocs failed.  */
2045
0
  if (input_section->check_relocs_failed)
2046
0
    return false;
2047
2048
0
  htab = elf_x86_hash_table (info, I386_ELF_DATA);
2049
0
  if (htab == NULL)
2050
0
    return false;
2051
2052
0
  if (!is_x86_elf (input_bfd, htab))
2053
0
    {
2054
0
      bfd_set_error (bfd_error_wrong_format);
2055
0
      return false;
2056
0
    }
2057
2058
0
  symtab_hdr = &elf_symtab_hdr (input_bfd);
2059
0
  sym_hashes = elf_sym_hashes (input_bfd);
2060
0
  local_got_offsets = elf_local_got_offsets (input_bfd);
2061
0
  local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
2062
  /* We have to handle relocations in vxworks .tls_vars sections
2063
     specially, because the dynamic loader is 'weird'.  */
2064
0
  is_vxworks_tls = (htab->elf.target_os == is_vxworks
2065
0
        && bfd_link_pic (info)
2066
0
        && !strcmp (input_section->output_section->name,
2067
0
        ".tls_vars"));
2068
2069
0
  _bfd_x86_elf_set_tls_module_base (info);
2070
2071
0
  plt_entry_size = htab->plt.plt_entry_size;
2072
2073
0
  rel = wrel = relocs;
2074
0
  relend = relocs + input_section->reloc_count;
2075
0
  for (; rel < relend; wrel++, rel++)
2076
0
    {
2077
0
      unsigned int r_type, r_type_tls;
2078
0
      reloc_howto_type *howto;
2079
0
      unsigned long r_symndx;
2080
0
      struct elf_link_hash_entry *h;
2081
0
      struct elf_x86_link_hash_entry *eh;
2082
0
      Elf_Internal_Sym *sym;
2083
0
      asection *sec;
2084
0
      bfd_vma off, offplt, plt_offset;
2085
0
      bfd_vma relocation;
2086
0
      bool unresolved_reloc;
2087
0
      bfd_reloc_status_type r;
2088
0
      unsigned int indx;
2089
0
      int tls_type;
2090
0
      bfd_vma st_size;
2091
0
      asection *resolved_plt;
2092
0
      bool resolved_to_zero;
2093
0
      bool relative_reloc;
2094
2095
0
      r_type = ELF32_R_TYPE (rel->r_info);
2096
0
      if (r_type == R_386_GNU_VTINHERIT
2097
0
    || r_type == R_386_GNU_VTENTRY)
2098
0
  {
2099
0
    if (wrel != rel)
2100
0
      *wrel = *rel;
2101
0
    continue;
2102
0
  }
2103
2104
0
      howto = elf_i386_rtype_to_howto (r_type);
2105
0
      if (howto == NULL)
2106
0
  return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2107
2108
0
      r_symndx = ELF32_R_SYM (rel->r_info);
2109
0
      h = NULL;
2110
0
      sym = NULL;
2111
0
      sec = NULL;
2112
0
      unresolved_reloc = false;
2113
0
      if (r_symndx < symtab_hdr->sh_info)
2114
0
  {
2115
0
    sym = local_syms + r_symndx;
2116
0
    sec = local_sections[r_symndx];
2117
0
    relocation = (sec->output_section->vma
2118
0
      + sec->output_offset
2119
0
      + sym->st_value);
2120
0
    st_size = sym->st_size;
2121
2122
0
    if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2123
0
        && ((sec->flags & SEC_MERGE) != 0
2124
0
      || (bfd_link_relocatable (info)
2125
0
          && sec->output_offset != 0)))
2126
0
      {
2127
0
        bfd_vma addend;
2128
0
        bfd_byte *where = contents + rel->r_offset;
2129
2130
0
        switch (bfd_get_reloc_size (howto))
2131
0
    {
2132
0
    case 1:
2133
0
      addend = bfd_get_8 (input_bfd, where);
2134
0
      if (howto->pc_relative)
2135
0
        {
2136
0
          addend = (addend ^ 0x80) - 0x80;
2137
0
          addend += 1;
2138
0
        }
2139
0
      break;
2140
0
    case 2:
2141
0
      addend = bfd_get_16 (input_bfd, where);
2142
0
      if (howto->pc_relative)
2143
0
        {
2144
0
          addend = (addend ^ 0x8000) - 0x8000;
2145
0
          addend += 2;
2146
0
        }
2147
0
      break;
2148
0
    case 4:
2149
0
      addend = bfd_get_32 (input_bfd, where);
2150
0
      if (howto->pc_relative)
2151
0
        {
2152
0
          addend = (addend ^ 0x80000000) - 0x80000000;
2153
0
          addend += 4;
2154
0
        }
2155
0
      break;
2156
0
    default:
2157
0
      abort ();
2158
0
    }
2159
2160
0
        if (bfd_link_relocatable (info))
2161
0
    addend += sec->output_offset;
2162
0
        else
2163
0
    {
2164
0
      asection *msec = sec;
2165
0
      addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2166
0
               addend);
2167
0
      addend -= relocation;
2168
0
      addend += msec->output_section->vma + msec->output_offset;
2169
0
    }
2170
2171
0
        switch (bfd_get_reloc_size (howto))
2172
0
    {
2173
0
    case 1:
2174
      /* FIXME: overflow checks.  */
2175
0
      if (howto->pc_relative)
2176
0
        addend -= 1;
2177
0
      bfd_put_8 (input_bfd, addend, where);
2178
0
      break;
2179
0
    case 2:
2180
0
      if (howto->pc_relative)
2181
0
        addend -= 2;
2182
0
      bfd_put_16 (input_bfd, addend, where);
2183
0
      break;
2184
0
    case 4:
2185
0
      if (howto->pc_relative)
2186
0
        addend -= 4;
2187
0
      bfd_put_32 (input_bfd, addend, where);
2188
0
      break;
2189
0
    }
2190
0
      }
2191
0
    else if (!bfd_link_relocatable (info)
2192
0
       && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2193
0
      {
2194
        /* Relocate against local STT_GNU_IFUNC symbol.  */
2195
0
        h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2196
0
               false);
2197
0
        if (h == NULL)
2198
0
    abort ();
2199
2200
        /* Set STT_GNU_IFUNC symbol value.  */
2201
0
        h->root.u.def.value = sym->st_value;
2202
0
        h->root.u.def.section = sec;
2203
0
      }
2204
0
  }
2205
0
      else
2206
0
  {
2207
0
    bool warned ATTRIBUTE_UNUSED;
2208
0
    bool ignored ATTRIBUTE_UNUSED;
2209
2210
0
    RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2211
0
           r_symndx, symtab_hdr, sym_hashes,
2212
0
           h, sec, relocation,
2213
0
           unresolved_reloc, warned, ignored);
2214
0
    st_size = h->size;
2215
0
  }
2216
2217
0
      if (sec != NULL && discarded_section (sec))
2218
0
  {
2219
0
    _bfd_clear_contents (howto, input_bfd, input_section,
2220
0
             contents, rel->r_offset);
2221
0
    wrel->r_offset = rel->r_offset;
2222
0
    wrel->r_info = 0;
2223
0
    wrel->r_addend = 0;
2224
2225
    /* For ld -r, remove relocations in debug sections against
2226
       sections defined in discarded sections.  Not done for
2227
       eh_frame editing code expects to be present.  */
2228
0
     if (bfd_link_relocatable (info)
2229
0
         && (input_section->flags & SEC_DEBUGGING))
2230
0
       wrel--;
2231
2232
0
     continue;
2233
0
  }
2234
2235
0
      if (bfd_link_relocatable (info))
2236
0
  {
2237
0
    if (wrel != rel)
2238
0
      *wrel = *rel;
2239
0
    continue;
2240
0
  }
2241
2242
0
      eh = (struct elf_x86_link_hash_entry *) h;
2243
2244
      /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2245
   it here if it is defined in a non-shared object.  */
2246
0
      if (h != NULL
2247
0
    && h->type == STT_GNU_IFUNC
2248
0
    && h->def_regular)
2249
0
  {
2250
0
    asection *gotplt, *base_got;
2251
0
    bfd_vma plt_index;
2252
0
    const char *name;
2253
2254
0
    if ((input_section->flags & SEC_ALLOC) == 0)
2255
0
      {
2256
        /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2257
           STT_GNU_IFUNC symbol as STT_FUNC.  */
2258
0
        if (elf_section_type (input_section) == SHT_NOTE)
2259
0
    goto skip_ifunc;
2260
        /* Dynamic relocs are not propagated for SEC_DEBUGGING
2261
     sections because such sections are not SEC_ALLOC and
2262
     thus ld.so will not process them.  */
2263
0
        if ((input_section->flags & SEC_DEBUGGING) != 0)
2264
0
    continue;
2265
0
        abort ();
2266
0
      }
2267
2268
    /* STT_GNU_IFUNC symbol must go through PLT.  */
2269
0
    if (htab->elf.splt != NULL)
2270
0
      {
2271
0
        if (htab->plt_second != NULL)
2272
0
    {
2273
0
      resolved_plt = htab->plt_second;
2274
0
      plt_offset = eh->plt_second.offset;
2275
0
    }
2276
0
        else
2277
0
    {
2278
0
      resolved_plt = htab->elf.splt;
2279
0
      plt_offset = h->plt.offset;
2280
0
    }
2281
0
        gotplt = htab->elf.sgotplt;
2282
0
      }
2283
0
    else
2284
0
      {
2285
0
        resolved_plt = htab->elf.iplt;
2286
0
        plt_offset = h->plt.offset;
2287
0
        gotplt = htab->elf.igotplt;
2288
0
      }
2289
2290
0
    switch (r_type)
2291
0
      {
2292
0
      default:
2293
0
        break;
2294
2295
0
      case R_386_GOT32:
2296
0
      case R_386_GOT32X:
2297
0
        base_got = htab->elf.sgot;
2298
0
        off = h->got.offset;
2299
2300
0
        if (base_got == NULL)
2301
0
    abort ();
2302
2303
0
        if (off == (bfd_vma) -1)
2304
0
    {
2305
      /* We can't use h->got.offset here to save state, or
2306
         even just remember the offset, as finish_dynamic_symbol
2307
         would use that as offset into .got.  */
2308
2309
0
      if (h->plt.offset == (bfd_vma) -1)
2310
0
        abort ();
2311
2312
0
      if (htab->elf.splt != NULL)
2313
0
        {
2314
0
          plt_index = (h->plt.offset / plt_entry_size
2315
0
           - htab->plt.has_plt0);
2316
0
          off = (plt_index + 3) * 4;
2317
0
          base_got = htab->elf.sgotplt;
2318
0
        }
2319
0
      else
2320
0
        {
2321
0
          plt_index = h->plt.offset / plt_entry_size;
2322
0
          off = plt_index * 4;
2323
0
          base_got = htab->elf.igotplt;
2324
0
        }
2325
2326
0
      if (h->dynindx == -1
2327
0
          || h->forced_local
2328
0
          || info->symbolic)
2329
0
        {
2330
          /* This references the local defitionion.  We must
2331
       initialize this entry in the global offset table.
2332
       Since the offset must always be a multiple of 4,
2333
       we use the least significant bit to record
2334
       whether we have initialized it already.
2335
2336
       When doing a dynamic link, we create a .rela.got
2337
       relocation entry to initialize the value.  This
2338
       is done in the finish_dynamic_symbol routine.   */
2339
0
          if ((off & 1) != 0)
2340
0
      off &= ~1;
2341
0
          else
2342
0
      {
2343
0
        bfd_put_32 (output_bfd, relocation,
2344
0
              base_got->contents + off);
2345
0
        h->got.offset |= 1;
2346
0
      }
2347
0
        }
2348
2349
0
      relocation = off;
2350
0
    }
2351
0
        else
2352
0
    relocation = (base_got->output_section->vma
2353
0
            + base_got->output_offset + off
2354
0
            - gotplt->output_section->vma
2355
0
            - gotplt->output_offset);
2356
2357
0
        if (rel->r_offset > 1
2358
0
      && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2359
0
      && *(contents + rel->r_offset - 2) != 0x8d)
2360
0
    {
2361
0
      if (bfd_link_pic (info))
2362
0
        goto disallow_got32;
2363
2364
      /* Add the GOT base if there is no base register.  */
2365
0
      relocation += (gotplt->output_section->vma
2366
0
         + gotplt->output_offset);
2367
0
    }
2368
0
        else if (htab->elf.splt == NULL)
2369
0
    {
2370
      /* Adjust for static executables.  */
2371
0
      relocation += gotplt->output_offset;
2372
0
    }
2373
2374
0
        goto do_relocation;
2375
0
      }
2376
2377
0
    if (h->plt.offset == (bfd_vma) -1)
2378
0
      {
2379
        /* Handle static pointers of STT_GNU_IFUNC symbols.  */
2380
0
        if (r_type == R_386_32
2381
0
      && (input_section->flags & SEC_CODE) == 0)
2382
0
    goto do_ifunc_pointer;
2383
0
        goto bad_ifunc_reloc;
2384
0
      }
2385
2386
0
    relocation = (resolved_plt->output_section->vma
2387
0
      + resolved_plt->output_offset + plt_offset);
2388
2389
0
    switch (r_type)
2390
0
      {
2391
0
      default:
2392
0
      bad_ifunc_reloc:
2393
0
        if (h->root.root.string)
2394
0
    name = h->root.root.string;
2395
0
        else
2396
0
    name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2397
0
           NULL);
2398
0
        _bfd_error_handler
2399
    /* xgettext:c-format */
2400
0
    (_("%pB: relocation %s against STT_GNU_IFUNC "
2401
0
       "symbol `%s' isn't supported"), input_bfd,
2402
0
     howto->name, name);
2403
0
        bfd_set_error (bfd_error_bad_value);
2404
0
        return false;
2405
2406
0
      case R_386_32:
2407
        /* Generate dynamic relcoation only when there is a
2408
     non-GOT reference in a shared object.  */
2409
0
        if ((bfd_link_pic (info) && h->non_got_ref)
2410
0
      || h->plt.offset == (bfd_vma) -1)
2411
0
    {
2412
0
      Elf_Internal_Rela outrel;
2413
0
      asection *sreloc;
2414
0
      bfd_vma offset;
2415
2416
0
    do_ifunc_pointer:
2417
      /* Need a dynamic relocation to get the real function
2418
         adddress.  */
2419
0
      offset = _bfd_elf_section_offset (output_bfd,
2420
0
                info,
2421
0
                input_section,
2422
0
                rel->r_offset);
2423
0
      if (offset == (bfd_vma) -1
2424
0
          || offset == (bfd_vma) -2)
2425
0
        abort ();
2426
2427
0
      outrel.r_offset = (input_section->output_section->vma
2428
0
             + input_section->output_offset
2429
0
             + offset);
2430
2431
0
      if (POINTER_LOCAL_IFUNC_P (info, h))
2432
0
        {
2433
0
          info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
2434
0
                h->root.root.string,
2435
0
                h->root.u.def.section->owner);
2436
2437
          /* This symbol is resolved locally.  */
2438
0
          outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2439
2440
0
          if (htab->params->report_relative_reloc)
2441
0
      _bfd_x86_elf_link_report_relative_reloc
2442
0
        (info, input_section, h, sym,
2443
0
         "R_386_IRELATIVE", &outrel);
2444
2445
0
          bfd_put_32 (output_bfd,
2446
0
          (h->root.u.def.value
2447
0
           + h->root.u.def.section->output_section->vma
2448
0
           + h->root.u.def.section->output_offset),
2449
0
          contents + offset);
2450
0
        }
2451
0
      else
2452
0
        outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2453
2454
      /* Dynamic relocations are stored in
2455
         1. .rel.ifunc section in PIC object.
2456
         2. .rel.got section in dynamic executable.
2457
         3. .rel.iplt section in static executable.  */
2458
0
      if (bfd_link_pic (info))
2459
0
        sreloc = htab->elf.irelifunc;
2460
0
      else if (htab->elf.splt != NULL)
2461
0
        sreloc = htab->elf.srelgot;
2462
0
      else
2463
0
        sreloc = htab->elf.irelplt;
2464
0
      elf_append_rel (output_bfd, sreloc, &outrel);
2465
2466
      /* If this reloc is against an external symbol, we
2467
         do not want to fiddle with the addend.  Otherwise,
2468
         we need to include the symbol value so that it
2469
         becomes an addend for the dynamic reloc.  For an
2470
         internal symbol, we have updated addend.  */
2471
0
      continue;
2472
0
    }
2473
        /* FALLTHROUGH */
2474
0
      case R_386_PC32:
2475
0
      case R_386_PLT32:
2476
0
        goto do_relocation;
2477
2478
0
      case R_386_GOTOFF:
2479
        /* NB: We can't use the PLT entry as the function address
2480
     for PIC since the PIC register may not be set up
2481
     properly for indirect call. */
2482
0
        if (bfd_link_pic (info))
2483
0
    goto bad_ifunc_reloc;
2484
0
        relocation -= (gotplt->output_section->vma
2485
0
           + gotplt->output_offset);
2486
0
        goto do_relocation;
2487
0
      }
2488
0
  }
2489
2490
0
    skip_ifunc:
2491
0
      resolved_to_zero = (eh != NULL
2492
0
        && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
2493
2494
0
      switch (r_type)
2495
0
  {
2496
0
  case R_386_GOT32X:
2497
0
  case R_386_GOT32:
2498
    /* Relocation is to the entry for this symbol in the global
2499
       offset table.  */
2500
0
    if (htab->elf.sgot == NULL)
2501
0
      abort ();
2502
2503
0
    relative_reloc = false;
2504
0
    if (h != NULL)
2505
0
      {
2506
0
        off = h->got.offset;
2507
0
        if (RESOLVED_LOCALLY_P (info, h, htab))
2508
0
    {
2509
      /* We must initialize this entry in the global offset
2510
         table.  Since the offset must always be a multiple
2511
         of 4, we use the least significant bit to record
2512
         whether we have initialized it already.
2513
2514
         When doing a dynamic link, we create a .rel.got
2515
         relocation entry to initialize the value.  This
2516
         is done in the finish_dynamic_symbol routine.  */
2517
0
      if ((off & 1) != 0)
2518
0
        off &= ~1;
2519
0
      else
2520
0
        {
2521
0
          bfd_put_32 (output_bfd, relocation,
2522
0
          htab->elf.sgot->contents + off);
2523
0
          h->got.offset |= 1;
2524
          /* NB: Don't generate relative relocation here if
2525
       it has been generated by DT_RELR.  */
2526
0
          if (!info->enable_dt_relr
2527
0
        && GENERATE_RELATIVE_RELOC_P (info, h))
2528
0
      {
2529
        /* PR ld/21402: If this symbol isn't dynamic
2530
           in PIC, generate R_386_RELATIVE here.  */
2531
0
        eh->no_finish_dynamic_symbol = 1;
2532
0
        relative_reloc = true;
2533
0
      }
2534
0
        }
2535
0
    }
2536
0
        else
2537
0
    unresolved_reloc = false;
2538
0
      }
2539
0
    else
2540
0
      {
2541
0
        if (local_got_offsets == NULL)
2542
0
    abort ();
2543
2544
0
        off = local_got_offsets[r_symndx];
2545
2546
        /* The offset must always be a multiple of 4.  We use
2547
     the least significant bit to record whether we have
2548
     already generated the necessary reloc.  */
2549
0
        if ((off & 1) != 0)
2550
0
    off &= ~1;
2551
0
        else
2552
0
    {
2553
0
      bfd_put_32 (output_bfd, relocation,
2554
0
            htab->elf.sgot->contents + off);
2555
0
      local_got_offsets[r_symndx] |= 1;
2556
2557
      /* NB: Don't generate relative relocation here if it
2558
         has been generated by DT_RELR.  */
2559
0
      if (!info->enable_dt_relr && bfd_link_pic (info))
2560
0
        relative_reloc = true;
2561
0
    }
2562
0
      }
2563
2564
0
    if (relative_reloc)
2565
0
      {
2566
0
        asection *s;
2567
0
        Elf_Internal_Rela outrel;
2568
2569
0
        s = htab->elf.srelgot;
2570
0
        if (s == NULL)
2571
0
    abort ();
2572
2573
0
        outrel.r_offset = (htab->elf.sgot->output_section->vma
2574
0
         + htab->elf.sgot->output_offset
2575
0
         + off);
2576
0
        outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2577
2578
0
        if (htab->params->report_relative_reloc)
2579
0
    _bfd_x86_elf_link_report_relative_reloc
2580
0
      (info, input_section, h, sym, "R_386_RELATIVE",
2581
0
       &outrel);
2582
2583
0
        elf_append_rel (output_bfd, s, &outrel);
2584
0
      }
2585
2586
0
    if (off >= (bfd_vma) -2)
2587
0
      abort ();
2588
2589
0
    relocation = (htab->elf.sgot->output_section->vma
2590
0
      + htab->elf.sgot->output_offset + off);
2591
0
    if (rel->r_offset > 1
2592
0
        && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2593
0
        && *(contents + rel->r_offset - 2) != 0x8d)
2594
0
      {
2595
0
        if (bfd_link_pic (info))
2596
0
    {
2597
      /* For PIC, disallow R_386_GOT32 without a base
2598
         register, except for "lea foo@GOT, %reg", since
2599
         we don't know what the GOT base is.  */
2600
0
      const char *name;
2601
2602
0
    disallow_got32:
2603
0
      if (h == NULL || h->root.root.string == NULL)
2604
0
        name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2605
0
               NULL);
2606
0
      else
2607
0
        name = h->root.root.string;
2608
2609
0
      _bfd_error_handler
2610
        /* xgettext:c-format */
2611
0
        (_("%pB: direct GOT relocation %s against `%s'"
2612
0
           " without base register can not be used"
2613
0
           " when making a shared object"),
2614
0
         input_bfd, howto->name, name);
2615
0
      bfd_set_error (bfd_error_bad_value);
2616
0
      return false;
2617
0
    }
2618
0
      }
2619
0
    else
2620
0
      {
2621
        /* Subtract the .got.plt section address only with a base
2622
     register.  */
2623
0
        relocation -= (htab->elf.sgotplt->output_section->vma
2624
0
           + htab->elf.sgotplt->output_offset);
2625
0
      }
2626
2627
0
    break;
2628
2629
0
  case R_386_GOTOFF:
2630
    /* Relocation is relative to the start of the global offset
2631
       table.  */
2632
2633
    /* Check to make sure it isn't a protected function or data
2634
       symbol for shared library since it may not be local when
2635
       used as function address or with copy relocation.  We also
2636
       need to make sure that a symbol is referenced locally.  */
2637
0
    if (!bfd_link_executable (info) && h)
2638
0
      {
2639
0
        if (!h->def_regular)
2640
0
    {
2641
0
      const char *v;
2642
2643
0
      switch (ELF_ST_VISIBILITY (h->other))
2644
0
        {
2645
0
        case STV_HIDDEN:
2646
0
          v = _("hidden symbol");
2647
0
          break;
2648
0
        case STV_INTERNAL:
2649
0
          v = _("internal symbol");
2650
0
          break;
2651
0
        case STV_PROTECTED:
2652
0
          v = _("protected symbol");
2653
0
          break;
2654
0
        default:
2655
0
          v = _("symbol");
2656
0
          break;
2657
0
        }
2658
2659
0
      _bfd_error_handler
2660
        /* xgettext:c-format */
2661
0
        (_("%pB: relocation R_386_GOTOFF against undefined %s"
2662
0
           " `%s' can not be used when making a shared object"),
2663
0
         input_bfd, v, h->root.root.string);
2664
0
      bfd_set_error (bfd_error_bad_value);
2665
0
      return false;
2666
0
    }
2667
0
        else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
2668
0
           && (h->type == STT_FUNC
2669
0
         || h->type == STT_OBJECT)
2670
0
           && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2671
0
    {
2672
0
      _bfd_error_handler
2673
        /* xgettext:c-format */
2674
0
        (_("%pB: relocation R_386_GOTOFF against protected %s"
2675
0
           " `%s' can not be used when making a shared object"),
2676
0
         input_bfd,
2677
0
         h->type == STT_FUNC ? "function" : "data",
2678
0
         h->root.root.string);
2679
0
      bfd_set_error (bfd_error_bad_value);
2680
0
      return false;
2681
0
    }
2682
0
      }
2683
2684
    /* Note that sgot is not involved in this
2685
       calculation.  We always want the start of .got.plt.  If we
2686
       defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2687
       permitted by the ABI, we might have to change this
2688
       calculation.  */
2689
0
    relocation -= htab->elf.sgotplt->output_section->vma
2690
0
      + htab->elf.sgotplt->output_offset;
2691
0
    break;
2692
2693
0
  case R_386_GOTPC:
2694
    /* Use global offset table as symbol value.  */
2695
0
    relocation = htab->elf.sgotplt->output_section->vma
2696
0
           + htab->elf.sgotplt->output_offset;
2697
0
    unresolved_reloc = false;
2698
0
    break;
2699
2700
0
  case R_386_PLT32:
2701
    /* Relocation is to the entry for this symbol in the
2702
       procedure linkage table.  */
2703
2704
    /* Resolve a PLT32 reloc against a local symbol directly,
2705
       without using the procedure linkage table.  */
2706
0
    if (h == NULL)
2707
0
      break;
2708
2709
0
    if ((h->plt.offset == (bfd_vma) -1
2710
0
         && eh->plt_got.offset == (bfd_vma) -1)
2711
0
        || htab->elf.splt == NULL)
2712
0
      {
2713
        /* We didn't make a PLT entry for this symbol.  This
2714
     happens when statically linking PIC code, or when
2715
     using -Bsymbolic.  */
2716
0
        break;
2717
0
      }
2718
2719
0
    if (h->plt.offset != (bfd_vma) -1)
2720
0
      {
2721
0
        if (htab->plt_second != NULL)
2722
0
    {
2723
0
      resolved_plt = htab->plt_second;
2724
0
      plt_offset = eh->plt_second.offset;
2725
0
    }
2726
0
        else
2727
0
    {
2728
0
      resolved_plt = htab->elf.splt;
2729
0
      plt_offset = h->plt.offset;
2730
0
    }
2731
0
      }
2732
0
    else
2733
0
      {
2734
0
        resolved_plt = htab->plt_got;
2735
0
        plt_offset = eh->plt_got.offset;
2736
0
      }
2737
2738
0
    relocation = (resolved_plt->output_section->vma
2739
0
      + resolved_plt->output_offset
2740
0
      + plt_offset);
2741
0
    unresolved_reloc = false;
2742
0
    break;
2743
2744
0
  case R_386_SIZE32:
2745
    /* Set to symbol size.  */
2746
0
    relocation = st_size;
2747
    /* Fall through.  */
2748
2749
0
  case R_386_32:
2750
0
  case R_386_PC32:
2751
0
    if ((input_section->flags & SEC_ALLOC) == 0
2752
0
        || is_vxworks_tls)
2753
0
      break;
2754
2755
0
    if (GENERATE_DYNAMIC_RELOCATION_P (false, info, eh, r_type,
2756
0
               sec, false,
2757
0
               resolved_to_zero,
2758
0
               (r_type == R_386_PC32)))
2759
0
      {
2760
0
        Elf_Internal_Rela outrel;
2761
0
        bool skip, relocate;
2762
0
        bool generate_dynamic_reloc = true;
2763
0
        asection *sreloc;
2764
2765
        /* When generating a shared object, these relocations
2766
     are copied into the output file to be resolved at run
2767
     time.  */
2768
2769
0
        skip = false;
2770
0
        relocate = false;
2771
2772
0
        outrel.r_offset =
2773
0
    _bfd_elf_section_offset (output_bfd, info, input_section,
2774
0
           rel->r_offset);
2775
0
        if (outrel.r_offset == (bfd_vma) -1)
2776
0
    skip = true;
2777
0
        else if (outrel.r_offset == (bfd_vma) -2)
2778
0
    skip = true, relocate = true;
2779
0
        outrel.r_offset += (input_section->output_section->vma
2780
0
          + input_section->output_offset);
2781
2782
0
        if (skip)
2783
0
    memset (&outrel, 0, sizeof outrel);
2784
0
        else if (COPY_INPUT_RELOC_P (false, info, h, r_type))
2785
0
    outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2786
0
        else
2787
0
    {
2788
      /* This symbol is local, or marked to become local.  */
2789
0
      relocate = true;
2790
      /* NB: Don't generate relative relocation here if it
2791
         has been generated by DT_RELR.  */
2792
0
      if (info->enable_dt_relr)
2793
0
        generate_dynamic_reloc = false;
2794
0
      else
2795
0
        {
2796
0
          outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2797
2798
0
          if (htab->params->report_relative_reloc)
2799
0
      _bfd_x86_elf_link_report_relative_reloc
2800
0
        (info, input_section, h, sym, "R_386_RELATIVE",
2801
0
         &outrel);
2802
0
        }
2803
0
    }
2804
2805
0
        if (generate_dynamic_reloc)
2806
0
    {
2807
0
      sreloc = elf_section_data (input_section)->sreloc;
2808
2809
0
      if (sreloc == NULL || sreloc->contents == NULL)
2810
0
        {
2811
0
          r = bfd_reloc_notsupported;
2812
0
          goto check_relocation_error;
2813
0
        }
2814
2815
0
      elf_append_rel (output_bfd, sreloc, &outrel);
2816
0
    }
2817
2818
        /* If this reloc is against an external symbol, we do
2819
     not want to fiddle with the addend.  Otherwise, we
2820
     need to include the symbol value so that it becomes
2821
     an addend for the dynamic reloc.  */
2822
0
        if (! relocate)
2823
0
    continue;
2824
0
      }
2825
0
    break;
2826
2827
0
  case R_386_TLS_IE:
2828
0
    if (!bfd_link_executable (info))
2829
0
      {
2830
0
        Elf_Internal_Rela outrel;
2831
0
        asection *sreloc;
2832
2833
0
        outrel.r_offset = rel->r_offset
2834
0
        + input_section->output_section->vma
2835
0
        + input_section->output_offset;
2836
0
        outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2837
2838
0
        if (htab->params->report_relative_reloc)
2839
0
    _bfd_x86_elf_link_report_relative_reloc
2840
0
      (info, input_section, h, sym, "R_386_RELATIVE",
2841
0
       &outrel);
2842
2843
0
        sreloc = elf_section_data (input_section)->sreloc;
2844
0
        if (sreloc == NULL)
2845
0
    abort ();
2846
0
        elf_append_rel (output_bfd, sreloc, &outrel);
2847
0
      }
2848
    /* Fall through */
2849
2850
0
  case R_386_TLS_GD:
2851
0
  case R_386_TLS_GOTDESC:
2852
0
  case R_386_TLS_DESC_CALL:
2853
0
  case R_386_TLS_IE_32:
2854
0
  case R_386_TLS_GOTIE:
2855
0
    tls_type = GOT_UNKNOWN;
2856
0
    if (h == NULL && local_got_offsets)
2857
0
      tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
2858
0
    else if (h != NULL)
2859
0
      tls_type = elf_x86_hash_entry(h)->tls_type;
2860
0
    if (tls_type == GOT_TLS_IE)
2861
0
      tls_type = GOT_TLS_IE_NEG;
2862
2863
0
     r_type_tls = r_type;
2864
0
    if (! elf_i386_tls_transition (info, input_bfd,
2865
0
           input_section, contents,
2866
0
           symtab_hdr, sym_hashes,
2867
0
           &r_type_tls, tls_type, rel,
2868
0
           relend, h, r_symndx, true))
2869
0
      return false;
2870
2871
0
    expected_tls_le = htab->elf.target_os == is_solaris
2872
0
      ? R_386_TLS_LE : R_386_TLS_LE_32;
2873
0
    if (r_type_tls == expected_tls_le)
2874
0
      {
2875
        /* NB: Solaris only supports R_386_TLS_GD->R_386_TLS_LE.  */
2876
0
        BFD_ASSERT (! unresolved_reloc
2877
0
        && (htab->elf.target_os != is_solaris
2878
0
            || (htab->elf.target_os == is_solaris
2879
0
          && (r_type == R_386_TLS_GD
2880
0
              || r_type == R_386_TLS_IE
2881
0
              || r_type == R_386_TLS_GOTIE))));
2882
0
        if (r_type == R_386_TLS_GD)
2883
0
    {
2884
0
      unsigned int type;
2885
0
      bfd_vma roff;
2886
2887
      /* GD->LE transition.  */
2888
0
      type = *(contents + rel->r_offset - 2);
2889
0
      if (type == 0x04)
2890
0
        {
2891
          /* Change
2892
        leal foo@tlsgd(,%ebx,1), %eax
2893
        call ___tls_get_addr@PLT
2894
       into:
2895
        movl %gs:0, %eax
2896
        subl $foo@tpoff, %eax
2897
       (6 byte form of subl).  */
2898
0
          roff = rel->r_offset + 5;
2899
0
        }
2900
0
      else
2901
0
        {
2902
          /* Change
2903
        leal foo@tlsgd(%ebx), %eax
2904
        call ___tls_get_addr@PLT
2905
        nop
2906
       or
2907
        leal foo@tlsgd(%reg), %eax
2908
        call *___tls_get_addr@GOT(%reg)
2909
        which may be converted to
2910
        addr32 call ___tls_get_addr
2911
       into:
2912
        movl %gs:0, %eax; subl $foo@tpoff, %eax
2913
       (6 byte form of subl).  */
2914
0
          roff = rel->r_offset + 6;
2915
0
        }
2916
0
      memcpy (contents + roff - 8,
2917
0
        "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2918
0
      bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
2919
0
            contents + roff);
2920
      /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X.  */
2921
0
      rel++;
2922
0
      wrel++;
2923
0
      continue;
2924
0
    }
2925
0
        else if (r_type == R_386_TLS_GOTDESC)
2926
0
    {
2927
      /* GDesc -> LE transition.
2928
         It's originally something like:
2929
         leal x@tlsdesc(%ebx), %eax
2930
2931
         leal x@ntpoff, %eax
2932
2933
         Registers other than %eax may be set up here.  */
2934
2935
0
      unsigned int val;
2936
0
      bfd_vma roff;
2937
2938
0
      roff = rel->r_offset;
2939
0
      val = bfd_get_8 (input_bfd, contents + roff - 1);
2940
2941
      /* Now modify the instruction as appropriate.  */
2942
      /* aoliva FIXME: remove the above and xor the byte
2943
         below with 0x86.  */
2944
0
      bfd_put_8 (output_bfd, val ^ 0x86,
2945
0
           contents + roff - 1);
2946
0
      bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2947
0
            contents + roff);
2948
0
      continue;
2949
0
    }
2950
0
        else if (r_type == R_386_TLS_DESC_CALL)
2951
0
    {
2952
      /* GDesc -> LE transition.
2953
         It's originally:
2954
         call *(%eax)
2955
         Turn it into:
2956
         xchg %ax,%ax  */
2957
2958
0
      bfd_vma roff;
2959
2960
0
      roff = rel->r_offset;
2961
0
      bfd_put_8 (output_bfd, 0x66, contents + roff);
2962
0
      bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2963
0
      continue;
2964
0
    }
2965
0
        else if (r_type == R_386_TLS_IE)
2966
0
    {
2967
0
      unsigned int val;
2968
2969
      /* IE->LE transition:
2970
         Originally it can be one of:
2971
         movl foo, %eax
2972
         movl foo, %reg
2973
         addl foo, %reg
2974
         We change it into:
2975
         movl $foo, %eax
2976
         movl $foo, %reg
2977
         addl $foo, %reg.  */
2978
0
      val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2979
0
      if (val == 0xa1)
2980
0
        {
2981
          /* movl foo, %eax.  */
2982
0
          bfd_put_8 (output_bfd, 0xb8,
2983
0
         contents + rel->r_offset - 1);
2984
0
        }
2985
0
      else
2986
0
        {
2987
0
          unsigned int type;
2988
2989
0
          type = bfd_get_8 (input_bfd,
2990
0
          contents + rel->r_offset - 2);
2991
0
          switch (type)
2992
0
      {
2993
0
      case 0x8b:
2994
        /* movl */
2995
0
        bfd_put_8 (output_bfd, 0xc7,
2996
0
             contents + rel->r_offset - 2);
2997
0
        bfd_put_8 (output_bfd,
2998
0
             0xc0 | ((val >> 3) & 7),
2999
0
             contents + rel->r_offset - 1);
3000
0
        break;
3001
0
      case 0x03:
3002
        /* addl */
3003
0
        bfd_put_8 (output_bfd, 0x81,
3004
0
             contents + rel->r_offset - 2);
3005
0
        bfd_put_8 (output_bfd,
3006
0
             0xc0 | ((val >> 3) & 7),
3007
0
             contents + rel->r_offset - 1);
3008
0
        break;
3009
0
      default:
3010
0
        BFD_FAIL ();
3011
0
        break;
3012
0
      }
3013
0
        }
3014
0
      bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3015
0
            contents + rel->r_offset);
3016
0
      continue;
3017
0
    }
3018
0
        else
3019
0
    {
3020
0
      unsigned int val, type;
3021
3022
      /* {IE_32,GOTIE}->LE transition:
3023
         Originally it can be one of:
3024
         subl foo(%reg1), %reg2
3025
         movl foo(%reg1), %reg2
3026
         addl foo(%reg1), %reg2
3027
         We change it into:
3028
         subl $foo, %reg2
3029
         movl $foo, %reg2 (6 byte form)
3030
         addl $foo, %reg2.  */
3031
0
      type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3032
0
      val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3033
0
      if (type == 0x8b)
3034
0
        {
3035
          /* movl */
3036
0
          bfd_put_8 (output_bfd, 0xc7,
3037
0
         contents + rel->r_offset - 2);
3038
0
          bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3039
0
         contents + rel->r_offset - 1);
3040
0
        }
3041
0
      else if (type == 0x2b)
3042
0
        {
3043
          /* subl */
3044
0
          bfd_put_8 (output_bfd, 0x81,
3045
0
         contents + rel->r_offset - 2);
3046
0
          bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3047
0
         contents + rel->r_offset - 1);
3048
0
        }
3049
0
      else if (type == 0x03)
3050
0
        {
3051
          /* addl */
3052
0
          bfd_put_8 (output_bfd, 0x81,
3053
0
         contents + rel->r_offset - 2);
3054
0
          bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3055
0
         contents + rel->r_offset - 1);
3056
0
        }
3057
0
      else
3058
0
        BFD_FAIL ();
3059
0
      if (r_type == R_386_TLS_GOTIE)
3060
0
        bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3061
0
        contents + rel->r_offset);
3062
0
      else
3063
0
        bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3064
0
        contents + rel->r_offset);
3065
0
      continue;
3066
0
    }
3067
0
      }
3068
3069
0
    if (htab->elf.sgot == NULL)
3070
0
      abort ();
3071
3072
0
    if (h != NULL)
3073
0
      {
3074
0
        off = h->got.offset;
3075
0
        offplt = elf_x86_hash_entry (h)->tlsdesc_got;
3076
0
      }
3077
0
    else
3078
0
      {
3079
0
        if (local_got_offsets == NULL)
3080
0
    abort ();
3081
3082
0
        off = local_got_offsets[r_symndx];
3083
0
        offplt = local_tlsdesc_gotents[r_symndx];
3084
0
      }
3085
3086
0
    if ((off & 1) != 0)
3087
0
      off &= ~1;
3088
0
    else
3089
0
      {
3090
0
        Elf_Internal_Rela outrel;
3091
0
        int dr_type;
3092
0
        asection *sreloc;
3093
3094
0
        if (htab->elf.srelgot == NULL)
3095
0
    abort ();
3096
3097
0
        indx = h && h->dynindx != -1 ? h->dynindx : 0;
3098
3099
0
        if (GOT_TLS_GDESC_P (tls_type))
3100
0
    {
3101
0
      bfd_byte *loc;
3102
0
      outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3103
0
      BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3104
0
            <= htab->elf.sgotplt->size);
3105
0
      outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3106
0
             + htab->elf.sgotplt->output_offset
3107
0
             + offplt
3108
0
             + htab->sgotplt_jump_table_size);
3109
0
      sreloc = htab->elf.srelplt;
3110
0
      loc = sreloc->contents;
3111
0
      loc += (htab->next_tls_desc_index++
3112
0
        * sizeof (Elf32_External_Rel));
3113
0
      BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3114
0
            <= sreloc->contents + sreloc->size);
3115
0
      bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3116
0
      if (indx == 0)
3117
0
        {
3118
0
          BFD_ASSERT (! unresolved_reloc);
3119
0
          bfd_put_32 (output_bfd,
3120
0
          relocation - _bfd_x86_elf_dtpoff_base (info),
3121
0
          htab->elf.sgotplt->contents + offplt
3122
0
          + htab->sgotplt_jump_table_size + 4);
3123
0
        }
3124
0
      else
3125
0
        {
3126
0
          bfd_put_32 (output_bfd, 0,
3127
0
          htab->elf.sgotplt->contents + offplt
3128
0
          + htab->sgotplt_jump_table_size + 4);
3129
0
        }
3130
0
    }
3131
3132
0
        sreloc = htab->elf.srelgot;
3133
3134
0
        outrel.r_offset = (htab->elf.sgot->output_section->vma
3135
0
         + htab->elf.sgot->output_offset + off);
3136
3137
0
        if (GOT_TLS_GD_P (tls_type))
3138
0
    dr_type = R_386_TLS_DTPMOD32;
3139
0
        else if (GOT_TLS_GDESC_P (tls_type))
3140
0
    goto dr_done;
3141
0
        else if (tls_type == GOT_TLS_IE_POS)
3142
0
    dr_type = R_386_TLS_TPOFF;
3143
0
        else
3144
0
    dr_type = R_386_TLS_TPOFF32;
3145
3146
0
        if (dr_type == R_386_TLS_TPOFF && indx == 0)
3147
0
    bfd_put_32 (output_bfd,
3148
0
          relocation - _bfd_x86_elf_dtpoff_base (info),
3149
0
          htab->elf.sgot->contents + off);
3150
0
        else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3151
0
    bfd_put_32 (output_bfd,
3152
0
          _bfd_x86_elf_dtpoff_base (info) - relocation,
3153
0
          htab->elf.sgot->contents + off);
3154
0
        else if (dr_type != R_386_TLS_DESC)
3155
0
    bfd_put_32 (output_bfd, 0,
3156
0
          htab->elf.sgot->contents + off);
3157
0
        outrel.r_info = ELF32_R_INFO (indx, dr_type);
3158
3159
0
        elf_append_rel (output_bfd, sreloc, &outrel);
3160
3161
0
        if (GOT_TLS_GD_P (tls_type))
3162
0
    {
3163
0
      if (indx == 0)
3164
0
        {
3165
0
          BFD_ASSERT (! unresolved_reloc);
3166
0
          bfd_put_32 (output_bfd,
3167
0
          relocation - _bfd_x86_elf_dtpoff_base (info),
3168
0
          htab->elf.sgot->contents + off + 4);
3169
0
        }
3170
0
      else
3171
0
        {
3172
0
          bfd_put_32 (output_bfd, 0,
3173
0
          htab->elf.sgot->contents + off + 4);
3174
0
          outrel.r_info = ELF32_R_INFO (indx,
3175
0
                R_386_TLS_DTPOFF32);
3176
0
          outrel.r_offset += 4;
3177
0
          elf_append_rel (output_bfd, sreloc, &outrel);
3178
0
        }
3179
0
    }
3180
0
        else if (tls_type == GOT_TLS_IE_BOTH)
3181
0
    {
3182
0
      bfd_put_32 (output_bfd,
3183
0
            (indx == 0
3184
0
             ? relocation - _bfd_x86_elf_dtpoff_base (info)
3185
0
             : 0),
3186
0
            htab->elf.sgot->contents + off + 4);
3187
0
      outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3188
0
      outrel.r_offset += 4;
3189
0
      elf_append_rel (output_bfd, sreloc, &outrel);
3190
0
    }
3191
3192
0
      dr_done:
3193
0
        if (h != NULL)
3194
0
    h->got.offset |= 1;
3195
0
        else
3196
0
    local_got_offsets[r_symndx] |= 1;
3197
0
      }
3198
3199
0
    if (off >= (bfd_vma) -2
3200
0
        && ! GOT_TLS_GDESC_P (tls_type))
3201
0
      abort ();
3202
0
    if (r_type_tls == R_386_TLS_GOTDESC
3203
0
        || r_type_tls == R_386_TLS_DESC_CALL)
3204
0
      {
3205
0
        relocation = htab->sgotplt_jump_table_size + offplt;
3206
0
        unresolved_reloc = false;
3207
0
      }
3208
0
    else if (r_type_tls == r_type)
3209
0
      {
3210
0
        bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3211
0
            + htab->elf.sgotplt->output_offset;
3212
0
        relocation = htab->elf.sgot->output_section->vma
3213
0
    + htab->elf.sgot->output_offset + off - g_o_t;
3214
0
        if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3215
0
      && tls_type == GOT_TLS_IE_BOTH)
3216
0
    relocation += 4;
3217
0
        if (r_type == R_386_TLS_IE)
3218
0
    relocation += g_o_t;
3219
0
        unresolved_reloc = false;
3220
0
      }
3221
0
    else if (r_type == R_386_TLS_GD)
3222
0
      {
3223
0
        unsigned int val, type;
3224
0
        bfd_vma roff;
3225
3226
        /* GD->IE transition.  */
3227
0
        type = *(contents + rel->r_offset - 2);
3228
0
        val = *(contents + rel->r_offset - 1);
3229
0
        if (type == 0x04)
3230
0
    {
3231
      /* Change
3232
      leal foo@tlsgd(,%ebx,1), %eax
3233
      call ___tls_get_addr@PLT
3234
         into:
3235
      movl %gs:0, %eax
3236
      subl $foo@gottpoff(%ebx), %eax.  */
3237
0
      val >>= 3;
3238
0
      roff = rel->r_offset - 3;
3239
0
    }
3240
0
        else
3241
0
    {
3242
      /* Change
3243
      leal foo@tlsgd(%ebx), %eax
3244
      call ___tls_get_addr@PLT
3245
      nop
3246
         or
3247
      leal foo@tlsgd(%reg), %eax
3248
      call *___tls_get_addr@GOT(%reg)
3249
      which may be converted to
3250
      addr32 call ___tls_get_addr
3251
         into:
3252
      movl %gs:0, %eax;
3253
      subl $foo@gottpoff(%reg), %eax.  */
3254
0
      roff = rel->r_offset - 2;
3255
0
    }
3256
0
        memcpy (contents + roff,
3257
0
          "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3258
0
        contents[roff + 7] = 0x80 | (val & 7);
3259
        /* If foo is used only with foo@gotntpoff(%reg) and
3260
     foo@indntpoff, but not with foo@gottpoff(%reg), change
3261
     subl $foo@gottpoff(%reg), %eax
3262
     into:
3263
     addl $foo@gotntpoff(%reg), %eax.  */
3264
0
        if (tls_type == GOT_TLS_IE_POS)
3265
0
    contents[roff + 6] = 0x03;
3266
0
        bfd_put_32 (output_bfd,
3267
0
        htab->elf.sgot->output_section->vma
3268
0
        + htab->elf.sgot->output_offset + off
3269
0
        - htab->elf.sgotplt->output_section->vma
3270
0
        - htab->elf.sgotplt->output_offset,
3271
0
        contents + roff + 8);
3272
        /* Skip R_386_PLT32 and R_386_GOT32X.  */
3273
0
        rel++;
3274
0
        wrel++;
3275
0
        continue;
3276
0
      }
3277
0
    else if (r_type == R_386_TLS_GOTDESC)
3278
0
      {
3279
        /* GDesc -> IE transition.
3280
     It's originally something like:
3281
     leal x@tlsdesc(%ebx), %eax
3282
3283
     Change it to:
3284
     movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3285
     or:
3286
     movl x@gottpoff(%ebx), %eax # before negl %eax
3287
3288
     Registers other than %eax may be set up here.  */
3289
3290
0
        bfd_vma roff;
3291
3292
        /* First, make sure it's a leal adding ebx to a 32-bit
3293
     offset into any register, although it's probably
3294
     almost always going to be eax.  */
3295
0
        roff = rel->r_offset;
3296
3297
        /* Now modify the instruction as appropriate.  */
3298
        /* To turn a leal into a movl in the form we use it, it
3299
     suffices to change the first byte from 0x8d to 0x8b.
3300
     aoliva FIXME: should we decide to keep the leal, all
3301
     we have to do is remove the statement below, and
3302
     adjust the relaxation of R_386_TLS_DESC_CALL.  */
3303
0
        bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3304
3305
0
        if (tls_type == GOT_TLS_IE_BOTH)
3306
0
    off += 4;
3307
3308
0
        bfd_put_32 (output_bfd,
3309
0
        htab->elf.sgot->output_section->vma
3310
0
        + htab->elf.sgot->output_offset + off
3311
0
        - htab->elf.sgotplt->output_section->vma
3312
0
        - htab->elf.sgotplt->output_offset,
3313
0
        contents + roff);
3314
0
        continue;
3315
0
      }
3316
0
    else if (r_type == R_386_TLS_DESC_CALL)
3317
0
      {
3318
        /* GDesc -> IE transition.
3319
     It's originally:
3320
     call *(%eax)
3321
3322
     Change it to:
3323
     xchg %ax,%ax
3324
     or
3325
     negl %eax
3326
     depending on how we transformed the TLS_GOTDESC above.
3327
        */
3328
3329
0
        bfd_vma roff;
3330
3331
0
        roff = rel->r_offset;
3332
3333
        /* Now modify the instruction as appropriate.  */
3334
0
        if (tls_type != GOT_TLS_IE_NEG)
3335
0
    {
3336
      /* xchg %ax,%ax */
3337
0
      bfd_put_8 (output_bfd, 0x66, contents + roff);
3338
0
      bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3339
0
    }
3340
0
        else
3341
0
    {
3342
      /* negl %eax */
3343
0
      bfd_put_8 (output_bfd, 0xf7, contents + roff);
3344
0
      bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3345
0
    }
3346
3347
0
        continue;
3348
0
      }
3349
0
    else
3350
0
      BFD_ASSERT (false);
3351
0
    break;
3352
3353
0
  case R_386_TLS_LDM:
3354
0
    if (! elf_i386_tls_transition (info, input_bfd,
3355
0
           input_section, contents,
3356
0
           symtab_hdr, sym_hashes,
3357
0
           &r_type, GOT_UNKNOWN, rel,
3358
0
           relend, h, r_symndx, true))
3359
0
      return false;
3360
3361
0
    if (r_type != R_386_TLS_LDM)
3362
0
      {
3363
        /* LD->LE transition.  Change
3364
      leal foo@tlsldm(%ebx) %eax
3365
      call ___tls_get_addr@PLT
3366
     into:
3367
      movl %gs:0, %eax
3368
      nop
3369
      leal 0(%esi,1), %esi
3370
     or change
3371
      leal foo@tlsldm(%reg) %eax
3372
      call *___tls_get_addr@GOT(%reg)
3373
      which may be converted to
3374
      addr32 call ___tls_get_addr
3375
     into:
3376
      movl %gs:0, %eax
3377
      leal 0(%esi), %esi  */
3378
0
        expected_tls_le = htab->elf.target_os == is_solaris
3379
0
    ? R_386_TLS_LE : R_386_TLS_LE_32;
3380
0
        BFD_ASSERT (r_type == expected_tls_le);
3381
0
        if (*(contents + rel->r_offset + 4) == 0xff
3382
0
      || *(contents + rel->r_offset + 4) == 0x67)
3383
0
    memcpy (contents + rel->r_offset - 2,
3384
0
      "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3385
0
        else
3386
0
    memcpy (contents + rel->r_offset - 2,
3387
0
      "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3388
        /* Skip R_386_PC32/R_386_PLT32.  */
3389
0
        rel++;
3390
0
        wrel++;
3391
0
        continue;
3392
0
      }
3393
3394
0
    if (htab->elf.sgot == NULL)
3395
0
      abort ();
3396
3397
0
    off = htab->tls_ld_or_ldm_got.offset;
3398
0
    if (off & 1)
3399
0
      off &= ~1;
3400
0
    else
3401
0
      {
3402
0
        Elf_Internal_Rela outrel;
3403
3404
0
        if (htab->elf.srelgot == NULL)
3405
0
    abort ();
3406
3407
0
        outrel.r_offset = (htab->elf.sgot->output_section->vma
3408
0
         + htab->elf.sgot->output_offset + off);
3409
3410
0
        bfd_put_32 (output_bfd, 0,
3411
0
        htab->elf.sgot->contents + off);
3412
0
        bfd_put_32 (output_bfd, 0,
3413
0
        htab->elf.sgot->contents + off + 4);
3414
0
        outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3415
0
        elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
3416
0
        htab->tls_ld_or_ldm_got.offset |= 1;
3417
0
      }
3418
0
    relocation = htab->elf.sgot->output_section->vma
3419
0
           + htab->elf.sgot->output_offset + off
3420
0
           - htab->elf.sgotplt->output_section->vma
3421
0
           - htab->elf.sgotplt->output_offset;
3422
0
    unresolved_reloc = false;
3423
0
    break;
3424
3425
0
  case R_386_TLS_LDO_32:
3426
0
    if (!bfd_link_executable (info)
3427
0
        || (input_section->flags & SEC_CODE) == 0)
3428
0
      relocation -= _bfd_x86_elf_dtpoff_base (info);
3429
0
    else
3430
      /* When converting LDO to LE, we must negate.  */
3431
0
      relocation = -elf_i386_tpoff (info, relocation);
3432
0
    break;
3433
3434
0
  case R_386_TLS_LE_32:
3435
0
  case R_386_TLS_LE:
3436
0
    if (!bfd_link_executable (info))
3437
0
      {
3438
0
        Elf_Internal_Rela outrel;
3439
0
        asection *sreloc;
3440
3441
0
        outrel.r_offset = rel->r_offset
3442
0
        + input_section->output_section->vma
3443
0
        + input_section->output_offset;
3444
0
        if (h != NULL && h->dynindx != -1)
3445
0
    indx = h->dynindx;
3446
0
        else
3447
0
    indx = 0;
3448
0
        if (r_type == R_386_TLS_LE_32)
3449
0
    outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3450
0
        else
3451
0
    outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3452
0
        sreloc = elf_section_data (input_section)->sreloc;
3453
0
        if (sreloc == NULL)
3454
0
    abort ();
3455
0
        elf_append_rel (output_bfd, sreloc, &outrel);
3456
0
        if (indx)
3457
0
    continue;
3458
0
        else if (r_type == R_386_TLS_LE_32)
3459
0
    relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
3460
0
        else
3461
0
    relocation -= _bfd_x86_elf_dtpoff_base (info);
3462
0
      }
3463
0
    else if (r_type == R_386_TLS_LE_32)
3464
0
      relocation = elf_i386_tpoff (info, relocation);
3465
0
    else
3466
0
      relocation = -elf_i386_tpoff (info, relocation);
3467
0
    break;
3468
3469
0
  default:
3470
0
    break;
3471
0
  }
3472
3473
      /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3474
   because such sections are not SEC_ALLOC and thus ld.so will
3475
   not process them.  */
3476
0
      if (unresolved_reloc
3477
0
    && !((input_section->flags & SEC_DEBUGGING) != 0
3478
0
         && h->def_dynamic)
3479
0
    && _bfd_elf_section_offset (output_bfd, info, input_section,
3480
0
              rel->r_offset) != (bfd_vma) -1)
3481
0
  {
3482
0
    _bfd_error_handler
3483
      /* xgettext:c-format */
3484
0
      (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
3485
0
       input_bfd,
3486
0
       input_section,
3487
0
       (uint64_t) rel->r_offset,
3488
0
       howto->name,
3489
0
       h->root.root.string);
3490
0
    return false;
3491
0
  }
3492
3493
0
    do_relocation:
3494
0
      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3495
0
            contents, rel->r_offset,
3496
0
            relocation, 0);
3497
3498
0
    check_relocation_error:
3499
0
      if (r != bfd_reloc_ok)
3500
0
  {
3501
0
    const char *name;
3502
3503
0
    if (h != NULL)
3504
0
      name = h->root.root.string;
3505
0
    else
3506
0
      {
3507
0
        name = bfd_elf_string_from_elf_section (input_bfd,
3508
0
                  symtab_hdr->sh_link,
3509
0
                  sym->st_name);
3510
0
        if (name == NULL)
3511
0
    return false;
3512
0
        if (*name == '\0')
3513
0
    name = bfd_section_name (sec);
3514
0
      }
3515
3516
0
    if (r == bfd_reloc_overflow)
3517
0
      (*info->callbacks->reloc_overflow)
3518
0
        (info, (h ? &h->root : NULL), name, howto->name,
3519
0
         (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3520
0
    else
3521
0
      {
3522
0
        _bfd_error_handler
3523
    /* xgettext:c-format */
3524
0
    (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3525
0
     input_bfd, input_section,
3526
0
     (uint64_t) rel->r_offset, name, (int) r);
3527
0
        return false;
3528
0
      }
3529
0
  }
3530
3531
0
      if (wrel != rel)
3532
0
  *wrel = *rel;
3533
0
    }
3534
3535
0
  if (wrel != rel)
3536
0
    {
3537
0
      Elf_Internal_Shdr *rel_hdr;
3538
0
      size_t deleted = rel - wrel;
3539
3540
0
      rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3541
0
      rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3542
0
      if (rel_hdr->sh_size == 0)
3543
0
  {
3544
    /* It is too late to remove an empty reloc section.  Leave
3545
       one NONE reloc.
3546
       ??? What is wrong with an empty section???  */
3547
0
    rel_hdr->sh_size = rel_hdr->sh_entsize;
3548
0
    deleted -= 1;
3549
0
  }
3550
0
      rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3551
0
      rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3552
0
      input_section->reloc_count -= deleted;
3553
0
    }
3554
3555
0
  return true;
3556
0
}
3557
3558
/* Finish up dynamic symbol handling.  We set the contents of various
3559
   dynamic sections here.  */
3560
3561
static bool
3562
elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3563
        struct bfd_link_info *info,
3564
        struct elf_link_hash_entry *h,
3565
        Elf_Internal_Sym *sym)
3566
0
{
3567
0
  struct elf_x86_link_hash_table *htab;
3568
0
  unsigned plt_entry_size;
3569
0
  struct elf_x86_link_hash_entry *eh;
3570
0
  bool local_undefweak;
3571
0
  bool use_plt_second;
3572
3573
0
  htab = elf_x86_hash_table (info, I386_ELF_DATA);
3574
0
  if (htab == NULL)
3575
0
    return false;
3576
3577
0
  plt_entry_size = htab->plt.plt_entry_size;
3578
3579
  /* Use the second PLT section only if there is .plt section.  */
3580
0
  use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3581
3582
0
  eh = (struct elf_x86_link_hash_entry *) h;
3583
0
  if (eh->no_finish_dynamic_symbol)
3584
0
    abort ();
3585
3586
  /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3587
     resolved undefined weak symbols in executable so that their
3588
     references have value 0 at run-time.  */
3589
0
  local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
3590
3591
0
  if (h->plt.offset != (bfd_vma) -1)
3592
0
    {
3593
0
      bfd_vma plt_index, plt_offset;
3594
0
      bfd_vma got_offset;
3595
0
      Elf_Internal_Rela rel;
3596
0
      bfd_byte *loc;
3597
0
      asection *plt, *resolved_plt, *gotplt, *relplt;
3598
3599
      /* When building a static executable, use .iplt, .igot.plt and
3600
   .rel.iplt sections for STT_GNU_IFUNC symbols.  */
3601
0
      if (htab->elf.splt != NULL)
3602
0
  {
3603
0
    plt = htab->elf.splt;
3604
0
    gotplt = htab->elf.sgotplt;
3605
0
    relplt = htab->elf.srelplt;
3606
0
  }
3607
0
      else
3608
0
  {
3609
0
    plt = htab->elf.iplt;
3610
0
    gotplt = htab->elf.igotplt;
3611
0
    relplt = htab->elf.irelplt;
3612
0
  }
3613
3614
0
      VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
3615
3616
      /* Get the index in the procedure linkage table which
3617
   corresponds to this symbol.  This is the index of this symbol
3618
   in all the symbols for which we are making plt entries.  The
3619
   first entry in the procedure linkage table is reserved.
3620
3621
   Get the offset into the .got table of the entry that
3622
   corresponds to this function.  Each .got entry is 4 bytes.
3623
   The first three are reserved.
3624
3625
   For static executables, we don't reserve anything.  */
3626
3627
0
      if (plt == htab->elf.splt)
3628
0
  {
3629
0
    got_offset = (h->plt.offset / plt_entry_size
3630
0
      - htab->plt.has_plt0);
3631
0
    got_offset = (got_offset + 3) * 4;
3632
0
  }
3633
0
      else
3634
0
  {
3635
0
    got_offset = h->plt.offset / plt_entry_size;
3636
0
    got_offset = got_offset * 4;
3637
0
  }
3638
3639
      /* Fill in the entry in the procedure linkage table and update
3640
   the first slot.  */
3641
0
      memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
3642
0
        plt_entry_size);
3643
3644
0
      if (use_plt_second)
3645
0
  {
3646
0
    const bfd_byte *plt_entry;
3647
0
    if (bfd_link_pic (info))
3648
0
      plt_entry = htab->non_lazy_plt->pic_plt_entry;
3649
0
    else
3650
0
      plt_entry = htab->non_lazy_plt->plt_entry;
3651
0
    memcpy (htab->plt_second->contents + eh->plt_second.offset,
3652
0
      plt_entry, htab->non_lazy_plt->plt_entry_size);
3653
3654
0
    resolved_plt = htab->plt_second;
3655
0
    plt_offset = eh->plt_second.offset;
3656
0
  }
3657
0
      else
3658
0
  {
3659
0
    resolved_plt = plt;
3660
0
    plt_offset = h->plt.offset;
3661
0
  }
3662
3663
0
      if (! bfd_link_pic (info))
3664
0
  {
3665
0
    bfd_put_32 (output_bfd,
3666
0
          (gotplt->output_section->vma
3667
0
           + gotplt->output_offset
3668
0
           + got_offset),
3669
0
          resolved_plt->contents + plt_offset
3670
0
          + htab->plt.plt_got_offset);
3671
3672
0
    if (htab->elf.target_os == is_vxworks)
3673
0
      {
3674
0
        int s, k, reloc_index;
3675
3676
        /* Create the R_386_32 relocation referencing the GOT
3677
     for this PLT entry.  */
3678
3679
        /* S: Current slot number (zero-based).  */
3680
0
        s = ((h->plt.offset - htab->plt.plt_entry_size)
3681
0
       / htab->plt.plt_entry_size);
3682
        /* K: Number of relocations for PLTResolve. */
3683
0
        if (bfd_link_pic (info))
3684
0
    k = PLTRESOLVE_RELOCS_SHLIB;
3685
0
        else
3686
0
    k = PLTRESOLVE_RELOCS;
3687
        /* Skip the PLTresolve relocations, and the relocations for
3688
     the other PLT slots. */
3689
0
        reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3690
0
        loc = (htab->srelplt2->contents + reloc_index
3691
0
         * sizeof (Elf32_External_Rel));
3692
3693
0
        rel.r_offset = (plt->output_section->vma
3694
0
            + plt->output_offset
3695
0
            + h->plt.offset + 2),
3696
0
        rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3697
0
        bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3698
3699
        /* Create the R_386_32 relocation referencing the beginning of
3700
     the PLT for this GOT entry.  */
3701
0
        rel.r_offset = (htab->elf.sgotplt->output_section->vma
3702
0
            + htab->elf.sgotplt->output_offset
3703
0
            + got_offset);
3704
0
        rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3705
0
        bfd_elf32_swap_reloc_out (output_bfd, &rel,
3706
0
          loc + sizeof (Elf32_External_Rel));
3707
0
      }
3708
0
  }
3709
0
      else
3710
0
  {
3711
0
    bfd_put_32 (output_bfd, got_offset,
3712
0
          resolved_plt->contents + plt_offset
3713
0
          + htab->plt.plt_got_offset);
3714
0
  }
3715
3716
      /* Fill in the entry in the global offset table.  Leave the entry
3717
   as zero for undefined weak symbol in PIE.  No PLT relocation
3718
   against undefined weak symbol in PIE.  */
3719
0
      if (!local_undefweak)
3720
0
  {
3721
0
    if (htab->plt.has_plt0)
3722
0
      bfd_put_32 (output_bfd,
3723
0
      (plt->output_section->vma
3724
0
       + plt->output_offset
3725
0
       + h->plt.offset
3726
0
       + htab->lazy_plt->plt_lazy_offset),
3727
0
      gotplt->contents + got_offset);
3728
3729
    /* Fill in the entry in the .rel.plt section.  */
3730
0
    rel.r_offset = (gotplt->output_section->vma
3731
0
        + gotplt->output_offset
3732
0
        + got_offset);
3733
0
    if (PLT_LOCAL_IFUNC_P (info, h))
3734
0
      {
3735
0
        info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3736
0
              h->root.root.string,
3737
0
              h->root.u.def.section->owner);
3738
3739
        /* If an STT_GNU_IFUNC symbol is locally defined, generate
3740
     R_386_IRELATIVE instead of R_386_JUMP_SLOT.  Store addend
3741
     in the .got.plt section.  */
3742
0
        bfd_put_32 (output_bfd,
3743
0
        (h->root.u.def.value
3744
0
         + h->root.u.def.section->output_section->vma
3745
0
         + h->root.u.def.section->output_offset),
3746
0
        gotplt->contents + got_offset);
3747
0
        rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3748
3749
0
        if (htab->params->report_relative_reloc)
3750
0
    _bfd_x86_elf_link_report_relative_reloc
3751
0
      (info, relplt, h, sym, "R_386_IRELATIVE", &rel);
3752
3753
        /* R_386_IRELATIVE comes last.  */
3754
0
        plt_index = htab->next_irelative_index--;
3755
0
      }
3756
0
    else
3757
0
      {
3758
0
        rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3759
0
        plt_index = htab->next_jump_slot_index++;
3760
0
      }
3761
3762
0
    loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3763
0
    bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3764
3765
    /* Don't fill the second and third slots in PLT entry for
3766
       static executables nor without PLT0.  */
3767
0
    if (plt == htab->elf.splt && htab->plt.has_plt0)
3768
0
      {
3769
0
        bfd_put_32 (output_bfd,
3770
0
        plt_index * sizeof (Elf32_External_Rel),
3771
0
        plt->contents + h->plt.offset
3772
0
        + htab->lazy_plt->plt_reloc_offset);
3773
0
        bfd_put_32 (output_bfd,
3774
0
        - (h->plt.offset
3775
0
           + htab->lazy_plt->plt_plt_offset + 4),
3776
0
        (plt->contents + h->plt.offset
3777
0
         + htab->lazy_plt->plt_plt_offset));
3778
0
      }
3779
0
  }
3780
0
    }
3781
0
  else if (eh->plt_got.offset != (bfd_vma) -1)
3782
0
    {
3783
0
      bfd_vma got_offset, plt_offset;
3784
0
      asection *plt, *got, *gotplt;
3785
0
      const bfd_byte *got_plt_entry;
3786
3787
      /* Set the entry in the GOT procedure linkage table.  */
3788
0
      plt = htab->plt_got;
3789
0
      got = htab->elf.sgot;
3790
0
      gotplt = htab->elf.sgotplt;
3791
0
      got_offset = h->got.offset;
3792
3793
0
      if (got_offset == (bfd_vma) -1
3794
0
    || plt == NULL
3795
0
    || got == NULL
3796
0
    || gotplt == NULL)
3797
0
  abort ();
3798
3799
      /* Fill in the entry in the GOT procedure linkage table.  */
3800
0
      if (! bfd_link_pic (info))
3801
0
  {
3802
0
    got_plt_entry = htab->non_lazy_plt->plt_entry;
3803
0
    got_offset += got->output_section->vma + got->output_offset;
3804
0
  }
3805
0
      else
3806
0
  {
3807
0
    got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
3808
0
    got_offset += (got->output_section->vma
3809
0
       + got->output_offset
3810
0
       - gotplt->output_section->vma
3811
0
       - gotplt->output_offset);
3812
0
  }
3813
3814
0
      plt_offset = eh->plt_got.offset;
3815
0
      memcpy (plt->contents + plt_offset, got_plt_entry,
3816
0
        htab->non_lazy_plt->plt_entry_size);
3817
0
      bfd_put_32 (output_bfd, got_offset,
3818
0
      (plt->contents + plt_offset
3819
0
       + htab->non_lazy_plt->plt_got_offset));
3820
0
    }
3821
3822
0
  if (!local_undefweak
3823
0
      && !h->def_regular
3824
0
      && (h->plt.offset != (bfd_vma) -1
3825
0
    || eh->plt_got.offset != (bfd_vma) -1))
3826
0
    {
3827
      /* Mark the symbol as undefined, rather than as defined in
3828
   the .plt section.  Leave the value if there were any
3829
   relocations where pointer equality matters (this is a clue
3830
   for the dynamic linker, to make function pointer
3831
   comparisons work between an application and shared
3832
   library), otherwise set it to zero.  If a function is only
3833
   called from a binary, there is no need to slow down
3834
   shared libraries because of that.  */
3835
0
      sym->st_shndx = SHN_UNDEF;
3836
0
      if (!h->pointer_equality_needed)
3837
0
  sym->st_value = 0;
3838
0
    }
3839
3840
0
  _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
3841
3842
  /* Don't generate dynamic GOT relocation against undefined weak
3843
     symbol in executable.  */
3844
0
  if (h->got.offset != (bfd_vma) -1
3845
0
      && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3846
0
      && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
3847
0
      && !local_undefweak)
3848
0
    {
3849
0
      Elf_Internal_Rela rel;
3850
0
      asection *relgot = htab->elf.srelgot;
3851
0
      const char *relative_reloc_name = NULL;
3852
0
      bool generate_dynamic_reloc = true;
3853
3854
      /* This symbol has an entry in the global offset table.  Set it
3855
   up.  */
3856
3857
0
      if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3858
0
  abort ();
3859
3860
0
      rel.r_offset = (htab->elf.sgot->output_section->vma
3861
0
          + htab->elf.sgot->output_offset
3862
0
          + (h->got.offset & ~(bfd_vma) 1));
3863
3864
      /* If this is a static link, or it is a -Bsymbolic link and the
3865
   symbol is defined locally or was forced to be local because
3866
   of a version file, we just want to emit a RELATIVE reloc.
3867
   The entry in the global offset table will already have been
3868
   initialized in the relocate_section function.  */
3869
0
      if (h->def_regular
3870
0
    && h->type == STT_GNU_IFUNC)
3871
0
  {
3872
0
    if (h->plt.offset == (bfd_vma) -1)
3873
0
      {
3874
        /* STT_GNU_IFUNC is referenced without PLT.  */
3875
0
        if (htab->elf.splt == NULL)
3876
0
    {
3877
      /* use .rel[a].iplt section to store .got relocations
3878
         in static executable.  */
3879
0
      relgot = htab->elf.irelplt;
3880
0
    }
3881
0
        if (SYMBOL_REFERENCES_LOCAL_P (info, h))
3882
0
    {
3883
0
      info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3884
0
            h->root.root.string,
3885
0
            h->root.u.def.section->owner);
3886
3887
0
      bfd_put_32 (output_bfd,
3888
0
            (h->root.u.def.value
3889
0
             + h->root.u.def.section->output_section->vma
3890
0
             + h->root.u.def.section->output_offset),
3891
0
            htab->elf.sgot->contents + h->got.offset);
3892
0
      rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3893
0
      relative_reloc_name = "R_386_IRELATIVE";
3894
0
    }
3895
0
        else
3896
0
    goto do_glob_dat;
3897
0
      }
3898
0
    else if (bfd_link_pic (info))
3899
0
      {
3900
        /* Generate R_386_GLOB_DAT.  */
3901
0
        goto do_glob_dat;
3902
0
      }
3903
0
    else
3904
0
      {
3905
0
        asection *plt;
3906
0
        bfd_vma plt_offset;
3907
3908
0
        if (!h->pointer_equality_needed)
3909
0
    abort ();
3910
3911
        /* For non-shared object, we can't use .got.plt, which
3912
     contains the real function addres if we need pointer
3913
     equality.  We load the GOT entry with the PLT entry.  */
3914
0
        if (htab->plt_second != NULL)
3915
0
    {
3916
0
      plt = htab->plt_second;
3917
0
      plt_offset = eh->plt_second.offset;
3918
0
    }
3919
0
        else
3920
0
    {
3921
0
      plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3922
0
      plt_offset = h->plt.offset;
3923
0
    }
3924
0
        bfd_put_32 (output_bfd,
3925
0
        (plt->output_section->vma
3926
0
         + plt->output_offset + plt_offset),
3927
0
        htab->elf.sgot->contents + h->got.offset);
3928
0
        return true;
3929
0
      }
3930
0
  }
3931
0
      else if (bfd_link_pic (info)
3932
0
         && SYMBOL_REFERENCES_LOCAL_P (info, h))
3933
0
  {
3934
0
    BFD_ASSERT((h->got.offset & 1) != 0);
3935
0
    if (info->enable_dt_relr)
3936
0
      generate_dynamic_reloc = false;
3937
0
    else
3938
0
      {
3939
0
        rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3940
0
        relative_reloc_name = "R_386_RELATIVE";
3941
0
      }
3942
0
  }
3943
0
      else
3944
0
  {
3945
0
    BFD_ASSERT((h->got.offset & 1) == 0);
3946
0
  do_glob_dat:
3947
0
    bfd_put_32 (output_bfd, (bfd_vma) 0,
3948
0
          htab->elf.sgot->contents + h->got.offset);
3949
0
    rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3950
0
  }
3951
3952
0
      if (generate_dynamic_reloc)
3953
0
  {
3954
0
    if (relative_reloc_name != NULL
3955
0
        && htab->params->report_relative_reloc)
3956
0
      _bfd_x86_elf_link_report_relative_reloc
3957
0
        (info, relgot, h, sym, relative_reloc_name, &rel);
3958
3959
0
    elf_append_rel (output_bfd, relgot, &rel);
3960
0
  }
3961
0
    }
3962
3963
0
  if (h->needs_copy)
3964
0
    {
3965
0
      Elf_Internal_Rela rel;
3966
0
      asection *s;
3967
3968
      /* This symbol needs a copy reloc.  Set it up.  */
3969
0
      VERIFY_COPY_RELOC (h, htab)
3970
3971
0
      rel.r_offset = (h->root.u.def.value
3972
0
          + h->root.u.def.section->output_section->vma
3973
0
          + h->root.u.def.section->output_offset);
3974
0
      rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3975
0
      if (h->root.u.def.section == htab->elf.sdynrelro)
3976
0
  s = htab->elf.sreldynrelro;
3977
0
      else
3978
0
  s = htab->elf.srelbss;
3979
0
      elf_append_rel (output_bfd, s, &rel);
3980
0
    }
3981
3982
0
  return true;
3983
0
}
3984
3985
/* Finish up local dynamic symbol handling.  We set the contents of
3986
   various dynamic sections here.  */
3987
3988
static int
3989
elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3990
0
{
3991
0
  struct elf_link_hash_entry *h
3992
0
    = (struct elf_link_hash_entry *) *slot;
3993
0
  struct bfd_link_info *info
3994
0
    = (struct bfd_link_info *) inf;
3995
3996
0
  return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
3997
0
           h, NULL);
3998
0
}
3999
4000
/* Finish up undefined weak symbol handling in PIE.  Fill its PLT entry
4001
   here since undefined weak symbol may not be dynamic and may not be
4002
   called for elf_i386_finish_dynamic_symbol.  */
4003
4004
static bool
4005
elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
4006
              void *inf)
4007
0
{
4008
0
  struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
4009
0
  struct bfd_link_info *info = (struct bfd_link_info *) inf;
4010
4011
0
  if (h->root.type != bfd_link_hash_undefweak
4012
0
      || h->dynindx != -1)
4013
0
    return true;
4014
4015
0
  return elf_i386_finish_dynamic_symbol (info->output_bfd,
4016
0
           info, h, NULL);
4017
0
}
4018
4019
/* Used to decide how to sort relocs in an optimal manner for the
4020
   dynamic linker, before writing them out.  */
4021
4022
static enum elf_reloc_type_class
4023
elf_i386_reloc_type_class (const struct bfd_link_info *info,
4024
         const asection *rel_sec ATTRIBUTE_UNUSED,
4025
         const Elf_Internal_Rela *rela)
4026
0
{
4027
0
  bfd *abfd = info->output_bfd;
4028
0
  const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4029
0
  struct elf_link_hash_table *htab = elf_hash_table (info);
4030
4031
0
  if (htab->dynsym != NULL
4032
0
      && htab->dynsym->contents != NULL)
4033
0
    {
4034
      /* Check relocation against STT_GNU_IFUNC symbol if there are
4035
   dynamic symbols.  */
4036
0
      unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
4037
0
      if (r_symndx != STN_UNDEF)
4038
0
  {
4039
0
    Elf_Internal_Sym sym;
4040
0
    if (!bed->s->swap_symbol_in (abfd,
4041
0
               (htab->dynsym->contents
4042
0
          + r_symndx * sizeof (Elf32_External_Sym)),
4043
0
               0, &sym))
4044
0
      abort ();
4045
4046
0
    if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
4047
0
      return reloc_class_ifunc;
4048
0
  }
4049
0
    }
4050
4051
0
  switch (ELF32_R_TYPE (rela->r_info))
4052
0
    {
4053
0
    case R_386_IRELATIVE:
4054
0
      return reloc_class_ifunc;
4055
0
    case R_386_RELATIVE:
4056
0
      return reloc_class_relative;
4057
0
    case R_386_JUMP_SLOT:
4058
0
      return reloc_class_plt;
4059
0
    case R_386_COPY:
4060
0
      return reloc_class_copy;
4061
0
    default:
4062
0
      return reloc_class_normal;
4063
0
    }
4064
0
}
4065
4066
/* Finish up the dynamic sections.  */
4067
4068
static bool
4069
elf_i386_finish_dynamic_sections (bfd *output_bfd,
4070
          struct bfd_link_info *info)
4071
0
{
4072
0
  struct elf_x86_link_hash_table *htab;
4073
4074
0
  htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
4075
0
  if (htab == NULL)
4076
0
    return false;
4077
4078
0
  if (!htab->elf.dynamic_sections_created)
4079
0
    return true;
4080
4081
0
  if (htab->elf.splt && htab->elf.splt->size > 0)
4082
0
    {
4083
0
      if (bfd_is_abs_section (htab->elf.splt->output_section))
4084
0
  {
4085
0
    info->callbacks->einfo
4086
0
      (_("%F%P: discarded output section: `%pA'\n"),
4087
0
       htab->elf.splt);
4088
0
    return false;
4089
0
  }
4090
4091
      /* UnixWare sets the entsize of .plt to 4, although that doesn't
4092
   really seem like the right value.  */
4093
0
      elf_section_data (htab->elf.splt->output_section)
4094
0
  ->this_hdr.sh_entsize = 4;
4095
4096
0
      if (htab->plt.has_plt0)
4097
0
  {
4098
    /* Fill in the special first entry in the procedure linkage
4099
       table.  */
4100
0
    memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
4101
0
      htab->lazy_plt->plt0_entry_size);
4102
0
    memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
4103
0
      htab->plt0_pad_byte,
4104
0
      htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
4105
0
    if (!bfd_link_pic (info))
4106
0
      {
4107
0
        bfd_put_32 (output_bfd,
4108
0
        (htab->elf.sgotplt->output_section->vma
4109
0
         + htab->elf.sgotplt->output_offset
4110
0
         + 4),
4111
0
        htab->elf.splt->contents
4112
0
        + htab->lazy_plt->plt0_got1_offset);
4113
0
        bfd_put_32 (output_bfd,
4114
0
        (htab->elf.sgotplt->output_section->vma
4115
0
         + htab->elf.sgotplt->output_offset
4116
0
         + 8),
4117
0
        htab->elf.splt->contents
4118
0
        + htab->lazy_plt->plt0_got2_offset);
4119
4120
0
        if (htab->elf.target_os == is_vxworks)
4121
0
    {
4122
0
      Elf_Internal_Rela rel;
4123
0
      int num_plts = (htab->elf.splt->size
4124
0
          / htab->plt.plt_entry_size) - 1;
4125
0
      unsigned char *p;
4126
0
      asection *srelplt2 = htab->srelplt2;
4127
4128
      /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4129
         + 4.  On IA32 we use REL relocations so the
4130
         addend goes in the PLT directly.  */
4131
0
      rel.r_offset = (htab->elf.splt->output_section->vma
4132
0
          + htab->elf.splt->output_offset
4133
0
          + htab->lazy_plt->plt0_got1_offset);
4134
0
      rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4135
0
               R_386_32);
4136
0
      bfd_elf32_swap_reloc_out (output_bfd, &rel,
4137
0
              srelplt2->contents);
4138
      /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4139
         + 8.  */
4140
0
      rel.r_offset = (htab->elf.splt->output_section->vma
4141
0
          + htab->elf.splt->output_offset
4142
0
          + htab->lazy_plt->plt0_got2_offset);
4143
0
      rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4144
0
               R_386_32);
4145
0
      bfd_elf32_swap_reloc_out (output_bfd, &rel,
4146
0
              srelplt2->contents +
4147
0
              sizeof (Elf32_External_Rel));
4148
      /* Correct the .rel.plt.unloaded relocations.  */
4149
0
      p = srelplt2->contents;
4150
0
      if (bfd_link_pic (info))
4151
0
        p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4152
0
      else
4153
0
        p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4154
4155
0
      for (; num_plts; num_plts--)
4156
0
        {
4157
0
          bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4158
0
          rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4159
0
             R_386_32);
4160
0
          bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4161
0
          p += sizeof (Elf32_External_Rel);
4162
4163
0
          bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4164
0
          rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4165
0
             R_386_32);
4166
0
          bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4167
0
          p += sizeof (Elf32_External_Rel);
4168
0
        }
4169
0
    }
4170
0
      }
4171
0
  }
4172
0
    }
4173
4174
  /* Fill PLT entries for undefined weak symbols in PIE.  */
4175
0
  if (bfd_link_pie (info))
4176
0
    bfd_hash_traverse (&info->hash->table,
4177
0
           elf_i386_pie_finish_undefweak_symbol,
4178
0
           info);
4179
4180
0
  return true;
4181
0
}
4182
4183
/* Fill PLT/GOT entries and allocate dynamic relocations for local
4184
   STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4185
   It has to be done before elf_link_sort_relocs is called so that
4186
   dynamic relocations are properly sorted.  */
4187
4188
static bool
4189
elf_i386_output_arch_local_syms
4190
  (bfd *output_bfd ATTRIBUTE_UNUSED,
4191
   struct bfd_link_info *info,
4192
   void *flaginfo ATTRIBUTE_UNUSED,
4193
   int (*func) (void *, const char *,
4194
    Elf_Internal_Sym *,
4195
    asection *,
4196
    struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4197
0
{
4198
0
  struct elf_x86_link_hash_table *htab
4199
0
    = elf_x86_hash_table (info, I386_ELF_DATA);
4200
0
  if (htab == NULL)
4201
0
    return false;
4202
4203
  /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols.  */
4204
0
  htab_traverse (htab->loc_hash_table,
4205
0
     elf_i386_finish_local_dynamic_symbol,
4206
0
     info);
4207
4208
0
  return true;
4209
0
}
4210
4211
/* Similar to _bfd_elf_get_synthetic_symtab.  Support PLTs with all
4212
   dynamic relocations.   */
4213
4214
static long
4215
elf_i386_get_synthetic_symtab (bfd *abfd,
4216
             long symcount ATTRIBUTE_UNUSED,
4217
             asymbol **syms ATTRIBUTE_UNUSED,
4218
             long dynsymcount,
4219
             asymbol **dynsyms,
4220
             asymbol **ret)
4221
10
{
4222
10
  long count, i, n;
4223
10
  int j;
4224
10
  bfd_byte *plt_contents;
4225
10
  long relsize;
4226
10
  const struct elf_x86_lazy_plt_layout *lazy_plt;
4227
10
  const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4228
10
  const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4229
10
  const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
4230
10
  asection *plt;
4231
10
  bfd_vma got_addr;
4232
10
  enum elf_x86_plt_type plt_type;
4233
10
  struct elf_x86_plt plts[] =
4234
10
    {
4235
10
      { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4236
10
      { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4237
10
      { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4238
10
      { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
4239
10
    };
4240
4241
10
  *ret = NULL;
4242
4243
10
  if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4244
2
    return 0;
4245
4246
8
  if (dynsymcount <= 0)
4247
0
    return 0;
4248
4249
8
  relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4250
8
  if (relsize <= 0)
4251
0
    return -1;
4252
4253
8
  non_lazy_plt = NULL;
4254
  /* Silence GCC 6.  */
4255
8
  lazy_plt = NULL;
4256
8
  non_lazy_ibt_plt = NULL;
4257
8
  lazy_ibt_plt = NULL;
4258
8
  switch (get_elf_backend_data (abfd)->target_os)
4259
8
    {
4260
8
    case is_normal:
4261
8
    case is_solaris:
4262
8
      non_lazy_plt = &elf_i386_non_lazy_plt;
4263
8
      lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4264
8
      non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4265
      /* Fall through */
4266
8
    case is_vxworks:
4267
8
      lazy_plt = &elf_i386_lazy_plt;
4268
8
      break;
4269
0
    default:
4270
0
      abort ();
4271
8
    }
4272
4273
8
  got_addr = 0;
4274
4275
8
  count = 0;
4276
32
  for (j = 0; plts[j].name != NULL; j++)
4277
24
    {
4278
24
      plt = bfd_get_section_by_name (abfd, plts[j].name);
4279
24
      if (plt == NULL || plt->size == 0)
4280
12
  continue;
4281
4282
      /* Get the PLT section contents.  */
4283
12
      plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4284
12
      if (plt_contents == NULL)
4285
0
  break;
4286
12
      if (!bfd_get_section_contents (abfd, (asection *) plt,
4287
12
             plt_contents, 0, plt->size))
4288
0
  {
4289
0
    free (plt_contents);
4290
0
    break;
4291
0
  }
4292
4293
      /* Check what kind of PLT it is.  */
4294
12
      plt_type = plt_unknown;
4295
12
      if (plts[j].type == plt_unknown
4296
12
    && (plt->size >= (lazy_plt->plt0_entry_size
4297
8
          + lazy_plt->plt_entry_size)))
4298
8
  {
4299
    /* Match lazy PLT first.  */
4300
8
    if (memcmp (plt_contents, lazy_plt->plt0_entry,
4301
8
          lazy_plt->plt0_got1_offset) == 0)
4302
3
      {
4303
        /* The fist entry in the lazy IBT PLT is the same as the
4304
     normal lazy PLT.  */
4305
3
        if (lazy_ibt_plt != NULL
4306
3
      && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4307
3
            lazy_ibt_plt->plt_entry,
4308
3
            lazy_ibt_plt->plt_got_offset) == 0))
4309
0
    plt_type = plt_lazy | plt_second;
4310
3
        else
4311
3
    plt_type = plt_lazy;
4312
3
      }
4313
5
    else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4314
5
         lazy_plt->plt0_got1_offset) == 0)
4315
5
      {
4316
        /* The fist entry in the PIC lazy IBT PLT is the same as
4317
     the normal PIC lazy PLT.  */
4318
5
        if (lazy_ibt_plt != NULL
4319
5
      && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4320
5
            lazy_ibt_plt->pic_plt_entry,
4321
5
            lazy_ibt_plt->plt_got_offset) == 0))
4322
0
    plt_type = plt_lazy | plt_pic | plt_second;
4323
5
        else
4324
5
    plt_type = plt_lazy | plt_pic;
4325
5
      }
4326
8
  }
4327
4328
12
      if (non_lazy_plt != NULL
4329
12
    && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4330
12
    && plt->size >= non_lazy_plt->plt_entry_size)
4331
4
  {
4332
    /* Match non-lazy PLT.  */
4333
4
    if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4334
4
          non_lazy_plt->plt_got_offset) == 0)
4335
0
      plt_type = plt_non_lazy;
4336
4
    else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4337
4
         non_lazy_plt->plt_got_offset) == 0)
4338
4
      plt_type = plt_pic;
4339
4
  }
4340
4341
12
      if ((non_lazy_ibt_plt != NULL)
4342
12
    && (plt_type == plt_unknown || plt_type == plt_second)
4343
12
    && plt->size >= non_lazy_ibt_plt->plt_entry_size)
4344
0
  {
4345
0
    if (memcmp (plt_contents,
4346
0
          non_lazy_ibt_plt->plt_entry,
4347
0
          non_lazy_ibt_plt->plt_got_offset) == 0)
4348
0
      {
4349
        /* Match IBT PLT.  */
4350
0
        plt_type = plt_second;
4351
0
        non_lazy_plt = non_lazy_ibt_plt;
4352
0
      }
4353
0
    else if (memcmp (plt_contents,
4354
0
         non_lazy_ibt_plt->pic_plt_entry,
4355
0
         non_lazy_ibt_plt->plt_got_offset) == 0)
4356
0
      {
4357
        /* Match PIC IBT PLT.  */
4358
0
        plt_type = plt_second | plt_pic;
4359
0
        non_lazy_plt = non_lazy_ibt_plt;
4360
0
      }
4361
0
  }
4362
4363
12
      if (plt_type == plt_unknown)
4364
0
  {
4365
0
    free (plt_contents);
4366
0
    continue;
4367
0
  }
4368
4369
12
      plts[j].sec = plt;
4370
12
      plts[j].type = plt_type;
4371
4372
12
      if ((plt_type & plt_lazy))
4373
8
  {
4374
8
    plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4375
8
    plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4376
    /* Skip PLT0 in lazy PLT.  */
4377
8
    i = 1;
4378
8
  }
4379
4
      else
4380
4
  {
4381
4
    plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4382
4
    plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4383
4
    i = 0;
4384
4
  }
4385
4386
      /* Skip lazy PLT when the second PLT is used.  */
4387
12
      if ((plt_type & (plt_lazy | plt_second))
4388
12
    == (plt_lazy | plt_second))
4389
0
  plts[j].count = 0;
4390
12
      else
4391
12
  {
4392
12
    n = plt->size / plts[j].plt_entry_size;
4393
12
    plts[j].count = n;
4394
12
    count += n - i;
4395
12
  }
4396
4397
12
      plts[j].contents = plt_contents;
4398
4399
      /* The _GLOBAL_OFFSET_TABLE_ address is needed.  */
4400
12
      if ((plt_type & plt_pic))
4401
9
  got_addr = (bfd_vma) -1;
4402
12
    }
4403
4404
8
  return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4405
8
              got_addr, plts, dynsyms,
4406
8
              ret);
4407
8
}
4408
4409
/* Set up i386 GNU properties.  Return the first relocatable ELF input
4410
   with GNU properties if found.  Otherwise, return NULL.  */
4411
4412
static bfd *
4413
elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4414
0
{
4415
0
  struct elf_x86_init_table init_table;
4416
4417
0
  switch (get_elf_backend_data (info->output_bfd)->target_os)
4418
0
    {
4419
0
    case is_normal:
4420
0
    case is_solaris:
4421
0
      init_table.plt0_pad_byte = 0x0;
4422
0
      init_table.lazy_plt = &elf_i386_lazy_plt;
4423
0
      init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4424
0
      init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4425
0
      init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4426
0
      break;
4427
0
    case is_vxworks:
4428
0
      init_table.plt0_pad_byte = 0x90;
4429
0
      init_table.lazy_plt = &elf_i386_lazy_plt;
4430
0
      init_table.non_lazy_plt = NULL;
4431
0
      init_table.lazy_ibt_plt = NULL;
4432
0
      init_table.non_lazy_ibt_plt = NULL;
4433
0
      break;
4434
0
    default:
4435
0
      abort ();
4436
0
    }
4437
4438
0
  init_table.r_info = elf32_r_info;
4439
0
  init_table.r_sym = elf32_r_sym;
4440
4441
0
  return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
4442
0
}
4443
4444
#define TARGET_LITTLE_SYM   i386_elf32_vec
4445
#define TARGET_LITTLE_NAME    "elf32-i386"
4446
#define ELF_ARCH      bfd_arch_i386
4447
#define ELF_TARGET_ID     I386_ELF_DATA
4448
#define ELF_MACHINE_CODE    EM_386
4449
#define ELF_MAXPAGESIZE     0x1000
4450
4451
#define elf_backend_can_gc_sections 1
4452
#define elf_backend_can_refcount  1
4453
#define elf_backend_want_got_plt  1
4454
#define elf_backend_plt_readonly  1
4455
#define elf_backend_want_plt_sym  0
4456
#define elf_backend_got_header_size 12
4457
#define elf_backend_plt_alignment 4
4458
#define elf_backend_dtrel_excludes_plt  1
4459
#define elf_backend_caches_rawsize  1
4460
#define elf_backend_want_dynrelro 1
4461
4462
/* Support RELA for objdump of prelink objects.  */
4463
#define elf_info_to_howto         elf_i386_info_to_howto_rel
4464
#define elf_info_to_howto_rel         elf_i386_info_to_howto_rel
4465
4466
#define bfd_elf32_bfd_is_local_label_name     elf_i386_is_local_label_name
4467
#define bfd_elf32_bfd_reloc_type_lookup       elf_i386_reloc_type_lookup
4468
#define bfd_elf32_bfd_reloc_name_lookup       elf_i386_reloc_name_lookup
4469
#define bfd_elf32_get_synthetic_symtab        elf_i386_get_synthetic_symtab
4470
4471
#define elf_backend_relocs_compatible       _bfd_elf_relocs_compatible
4472
#define elf_backend_always_size_sections      elf_i386_always_size_sections
4473
#define elf_backend_create_dynamic_sections   _bfd_elf_create_dynamic_sections
4474
#define elf_backend_fake_sections       elf_i386_fake_sections
4475
#define elf_backend_finish_dynamic_sections   elf_i386_finish_dynamic_sections
4476
#define elf_backend_finish_dynamic_symbol     elf_i386_finish_dynamic_symbol
4477
#define elf_backend_output_arch_local_syms     elf_i386_output_arch_local_syms
4478
#define elf_backend_grok_prstatus       elf_i386_grok_prstatus
4479
#define elf_backend_grok_psinfo         elf_i386_grok_psinfo
4480
#define elf_backend_reloc_type_class        elf_i386_reloc_type_class
4481
#define elf_backend_relocate_section        elf_i386_relocate_section
4482
#define elf_backend_setup_gnu_properties      elf_i386_link_setup_gnu_properties
4483
#define elf_backend_hide_symbol         _bfd_x86_elf_hide_symbol
4484
4485
#define elf_backend_linux_prpsinfo32_ugid16 true
4486
4487
#define elf32_bed           elf32_i386_bed
4488
4489
#include "elf32-target.h"
4490
4491
/* FreeBSD support.  */
4492
4493
#undef  TARGET_LITTLE_SYM
4494
#define TARGET_LITTLE_SYM   i386_elf32_fbsd_vec
4495
#undef  TARGET_LITTLE_NAME
4496
#define TARGET_LITTLE_NAME    "elf32-i386-freebsd"
4497
#undef  ELF_OSABI
4498
#define ELF_OSABI     ELFOSABI_FREEBSD
4499
4500
/* The kernel recognizes executables as valid only if they carry a
4501
   "FreeBSD" label in the ELF header.  So we put this label on all
4502
   executables and (for simplicity) also all other object files.  */
4503
4504
static bool
4505
elf_i386_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
4506
0
{
4507
0
  if (!_bfd_elf_init_file_header (abfd, info))
4508
0
    return false;
4509
4510
#ifdef OLD_FREEBSD_ABI_LABEL
4511
  {
4512
    /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
4513
    Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4514
    memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4515
  }
4516
#endif
4517
0
  return true;
4518
0
}
4519
4520
#undef  elf_backend_init_file_header
4521
#define elf_backend_init_file_header  elf_i386_fbsd_init_file_header
4522
#undef  elf32_bed
4523
#define elf32_bed       elf32_i386_fbsd_bed
4524
4525
#undef elf_backend_add_symbol_hook
4526
4527
#include "elf32-target.h"
4528
4529
#undef elf_backend_init_file_header
4530
4531
/* Solaris 2.  */
4532
4533
#undef  TARGET_LITTLE_SYM
4534
#define TARGET_LITTLE_SYM   i386_elf32_sol2_vec
4535
#undef  TARGET_LITTLE_NAME
4536
#define TARGET_LITTLE_NAME    "elf32-i386-sol2"
4537
4538
#undef  ELF_TARGET_OS
4539
#define ELF_TARGET_OS     is_solaris
4540
4541
/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4542
   objects won't be recognized.  */
4543
#undef ELF_OSABI
4544
4545
#undef  elf32_bed
4546
#define elf32_bed     elf32_i386_sol2_bed
4547
4548
/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4549
   boundary.  */
4550
#undef  elf_backend_static_tls_alignment
4551
#define elf_backend_static_tls_alignment 8
4552
4553
/* The Solaris 2 ABI requires a plt symbol on all platforms.
4554
4555
   Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4556
   File, p.63.  */
4557
#undef  elf_backend_want_plt_sym
4558
#define elf_backend_want_plt_sym  1
4559
4560
#undef  elf_backend_strtab_flags
4561
#define elf_backend_strtab_flags  SHF_STRINGS
4562
4563
/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
4564
   has a type >= SHT_LOOS.  Returns TRUE if these fields were initialised
4565
   FALSE otherwise.  ISECTION is the best guess matching section from the
4566
   input bfd IBFD, but it might be NULL.  */
4567
4568
static bool
4569
elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4570
            bfd *obfd ATTRIBUTE_UNUSED,
4571
            const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4572
            Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
4573
0
{
4574
  /* PR 19938: FIXME: Need to add code for setting the sh_info
4575
     and sh_link fields of Solaris specific section types.  */
4576
0
  return false;
4577
4578
  /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
4579
     Object File Format, Table 13-9  ELF sh_link and sh_info Interpretation:
4580
4581
http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4582
4583
     The following values should be set:
4584
4585
Type         Link         Info
4586
-----------------------------------------------------------------------------
4587
SHT_SUNW_ancillary   The section header index of    0
4588
 [0x6fffffee]      the associated string table.
4589
4590
SHT_SUNW_capinfo     The section header index of    For a dynamic object, the
4591
 [0x6ffffff0]      the associated symbol table.   section header index of
4592
                the associated
4593
                SHT_SUNW_capchain table,
4594
                otherwise 0.
4595
4596
SHT_SUNW_symsort     The section header index of    0
4597
 [0x6ffffff1]      the associated symbol table.
4598
4599
SHT_SUNW_tlssort     The section header index of    0
4600
 [0x6ffffff2]      the associated symbol table.
4601
4602
SHT_SUNW_LDYNSYM     The section header index of    One greater than the
4603
 [0x6ffffff3]      the associated string table.   symbol table index of the
4604
         This index is the same string  last local symbol,
4605
         table used by the SHT_DYNSYM   STB_LOCAL. Since
4606
         section.         SHT_SUNW_LDYNSYM only
4607
                contains local symbols,
4608
                sh_info is equivalent to
4609
                the number of symbols in
4610
                the table.
4611
4612
SHT_SUNW_cap       If symbol capabilities exist,  If any capabilities refer
4613
 [0x6ffffff5]      the section header index of    to named strings, the
4614
         the associated       section header index of
4615
         SHT_SUNW_capinfo table,      the associated string
4616
        otherwise 0.        table, otherwise 0.
4617
4618
SHT_SUNW_move      The section header index of    0
4619
 [0x6ffffffa]      the associated symbol table.
4620
4621
SHT_SUNW_COMDAT      0            0
4622
 [0x6ffffffb]
4623
4624
SHT_SUNW_syminfo     The section header index of    The section header index
4625
 [0x6ffffffc]      the associated symbol table.   of the associated
4626
                .dynamic section.
4627
4628
SHT_SUNW_verdef      The section header index of    The number of version
4629
 [0x6ffffffd]      the associated string table.   definitions within the
4630
                section.
4631
4632
SHT_SUNW_verneed     The section header index of    The number of version
4633
 [0x6ffffffe]      the associated string table.   dependencies within the
4634
                section.
4635
4636
SHT_SUNW_versym      The section header index of    0
4637
 [0x6fffffff]      the associated symbol table.  */
4638
0
}
4639
4640
#undef  elf_backend_copy_special_section_fields
4641
#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
4642
4643
#include "elf32-target.h"
4644
4645
/* Intel MCU support.  */
4646
4647
static bool
4648
elf32_iamcu_elf_object_p (bfd *abfd)
4649
1.17k
{
4650
  /* Set the right machine number for an IAMCU elf32 file.  */
4651
1.17k
  bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4652
1.17k
  return true;
4653
1.17k
}
4654
4655
#undef  TARGET_LITTLE_SYM
4656
#define TARGET_LITTLE_SYM   iamcu_elf32_vec
4657
#undef  TARGET_LITTLE_NAME
4658
#define TARGET_LITTLE_NAME    "elf32-iamcu"
4659
#undef  ELF_ARCH
4660
#define ELF_ARCH      bfd_arch_iamcu
4661
4662
#undef  ELF_MACHINE_CODE
4663
#define ELF_MACHINE_CODE    EM_IAMCU
4664
4665
#undef  ELF_TARGET_OS
4666
#undef  ELF_OSABI
4667
4668
#undef  elf32_bed
4669
#define elf32_bed     elf32_iamcu_bed
4670
4671
#undef  elf_backend_object_p
4672
#define elf_backend_object_p    elf32_iamcu_elf_object_p
4673
4674
#undef  elf_backend_static_tls_alignment
4675
4676
#undef  elf_backend_want_plt_sym
4677
#define elf_backend_want_plt_sym  0
4678
4679
#undef  elf_backend_strtab_flags
4680
#undef  elf_backend_copy_special_section_fields
4681
4682
#include "elf32-target.h"
4683
4684
/* Restore defaults.  */
4685
#undef  ELF_ARCH
4686
#define ELF_ARCH      bfd_arch_i386
4687
#undef  ELF_MACHINE_CODE
4688
#define ELF_MACHINE_CODE    EM_386
4689
#undef  elf_backend_object_p
4690
4691
/* VxWorks support.  */
4692
4693
#undef  TARGET_LITTLE_SYM
4694
#define TARGET_LITTLE_SYM   i386_elf32_vxworks_vec
4695
#undef  TARGET_LITTLE_NAME
4696
#define TARGET_LITTLE_NAME    "elf32-i386-vxworks"
4697
#undef  ELF_OSABI
4698
#undef  ELF_MAXPAGESIZE
4699
#define ELF_MAXPAGESIZE     0x1000
4700
#undef  elf_backend_plt_alignment
4701
#define elf_backend_plt_alignment 4
4702
4703
#undef  ELF_TARGET_OS
4704
#define ELF_TARGET_OS   is_vxworks
4705
4706
#undef elf_backend_relocs_compatible
4707
#undef elf_backend_add_symbol_hook
4708
#define elf_backend_add_symbol_hook \
4709
  elf_vxworks_add_symbol_hook
4710
#undef elf_backend_link_output_symbol_hook
4711
#define elf_backend_link_output_symbol_hook \
4712
  elf_vxworks_link_output_symbol_hook
4713
#undef elf_backend_emit_relocs
4714
#define elf_backend_emit_relocs     elf_vxworks_emit_relocs
4715
#undef elf_backend_final_write_processing
4716
#define elf_backend_final_write_processing \
4717
  elf_vxworks_final_write_processing
4718
#undef elf_backend_static_tls_alignment
4719
4720
/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4721
   define it.  */
4722
#undef elf_backend_want_plt_sym
4723
#define elf_backend_want_plt_sym  1
4724
4725
#undef  elf32_bed
4726
#define elf32_bed       elf32_i386_vxworks_bed
4727
4728
#include "elf32-target.h"