Coverage Report

Created: 2024-05-21 06:29

/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) 1993-2024 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
31.4k
#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
15.7k
{
368
15.7k
  unsigned int indx;
369
370
15.7k
  if ((indx = r_type) >= R_386_standard
371
15.7k
      && ((indx = r_type - R_386_ext_offset) - R_386_standard
372
0
    >= R_386_ext - R_386_standard)
373
15.7k
      && ((indx = r_type - R_386_tls_offset) - R_386_ext
374
0
    >= R_386_ext2 - R_386_ext)
375
15.7k
      && ((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
15.7k
  if (elf_howto_table [indx].type != r_type)
380
0
    return NULL;
381
15.7k
  return &elf_howto_table[indx];
382
15.7k
}
383
384
static bool
385
elf_i386_info_to_howto_rel (bfd *abfd,
386
          arelent *cache_ptr,
387
          Elf_Internal_Rela *dst)
388
15.7k
{
389
15.7k
  unsigned int r_type = ELF32_R_TYPE (dst->r_info);
390
391
15.7k
  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
15.7k
  return true;
401
15.7k
}
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
  if (htab == NULL || ! is_x86_elf (abfd, htab))
1245
0
    {
1246
0
      bfd_set_error (bfd_error_wrong_format);
1247
0
      return false;
1248
0
    }
1249
1250
0
  is_pic = bfd_link_pic (link_info);
1251
1252
0
  r_type = *r_type_p;
1253
0
  r_symndx = ELF32_R_SYM (irel->r_info);
1254
1255
0
  modrm = bfd_get_8 (abfd, contents + roff - 1);
1256
0
  baseless = (modrm & 0xc7) == 0x5;
1257
1258
0
  if (h)
1259
0
    {
1260
      /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P.  */
1261
0
      local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
1262
0
      isym = NULL;
1263
0
      abs_symbol = ABS_SYMBOL_P (h);
1264
0
    }
1265
0
  else
1266
0
    {
1267
0
      local_ref = true;
1268
0
      isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd,
1269
0
            r_symndx);
1270
0
      abs_symbol = isym->st_shndx == SHN_ABS;
1271
0
    }
1272
1273
0
  if (baseless && is_pic)
1274
0
    {
1275
      /* For PIC, disallow R_386_GOT32X without a base register
1276
   since we don't know what the GOT base is.  */
1277
0
      const char *name;
1278
1279
0
      if (h == NULL)
1280
0
  name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1281
0
      else
1282
0
  name = h->root.root.string;
1283
1284
0
      _bfd_error_handler
1285
  /* xgettext:c-format */
1286
0
  (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
1287
0
     " register can not be used when making a shared object"),
1288
0
   abfd, name);
1289
0
      return false;
1290
0
    }
1291
1292
0
  opcode = bfd_get_8 (abfd, contents + roff - 2);
1293
1294
  /* Convert to R_386_32 if PIC is false or there is no base
1295
     register.  */
1296
0
  to_reloc_32 = !is_pic || baseless;
1297
1298
0
  eh = elf_x86_hash_entry (h);
1299
1300
  /* Try to convert R_386_GOT32X.  Get the symbol referred to by the
1301
     reloc.  */
1302
0
  if (h == NULL)
1303
0
    {
1304
0
      if (opcode == 0x0ff)
1305
  /* Convert "call/jmp *foo@GOT[(%reg)]".  */
1306
0
  goto convert_branch;
1307
0
      else
1308
  /* Convert "mov foo@GOT[(%reg1)], %reg2",
1309
     "test %reg1, foo@GOT(%reg2)" and
1310
     "binop foo@GOT[(%reg1)], %reg2". */
1311
0
  goto convert_load;
1312
0
    }
1313
1314
  /* Undefined weak symbol is only bound locally in executable
1315
     and its reference is resolved as 0.  */
1316
0
  if (h->root.type == bfd_link_hash_undefweak
1317
0
      && !eh->linker_def
1318
0
      && local_ref)
1319
0
    {
1320
0
      if (opcode == 0xff)
1321
0
  {
1322
    /* No direct branch to 0 for PIC.  */
1323
0
    if (is_pic)
1324
0
      return true;
1325
0
    else
1326
0
      goto convert_branch;
1327
0
  }
1328
0
      else
1329
0
  {
1330
    /* We can convert load of address 0 to R_386_32.  */
1331
0
    to_reloc_32 = true;
1332
0
    goto convert_load;
1333
0
  }
1334
0
    }
1335
1336
0
  if (opcode == 0xff)
1337
0
    {
1338
      /* We have "call/jmp *foo@GOT[(%reg)]".  */
1339
0
      if ((h->root.type == bfd_link_hash_defined
1340
0
     || h->root.type == bfd_link_hash_defweak)
1341
0
    && local_ref)
1342
0
  {
1343
    /* The function is locally defined.   */
1344
0
  convert_branch:
1345
    /* Convert R_386_GOT32X to R_386_PC32.  */
1346
0
    if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1347
0
      {
1348
        /* Convert to "nop call foo".  ADDR_PREFIX_OPCODE
1349
     is a nop prefix.  */
1350
0
        modrm = 0xe8;
1351
        /* To support TLS optimization, always use addr32 prefix
1352
     for "call *___tls_get_addr@GOT(%reg)".  */
1353
0
        if (eh && eh->tls_get_addr)
1354
0
    {
1355
0
      nop = 0x67;
1356
0
      nop_offset = irel->r_offset - 2;
1357
0
    }
1358
0
        else
1359
0
    {
1360
0
      nop = htab->params->call_nop_byte;
1361
0
      if (htab->params->call_nop_as_suffix)
1362
0
        {
1363
0
          nop_offset = roff + 3;
1364
0
          irel->r_offset -= 1;
1365
0
        }
1366
0
      else
1367
0
        nop_offset = roff - 2;
1368
0
    }
1369
0
      }
1370
0
    else
1371
0
      {
1372
        /* Convert to "jmp foo nop".  */
1373
0
        modrm = 0xe9;
1374
0
        nop = NOP_OPCODE;
1375
0
        nop_offset = roff + 3;
1376
0
        irel->r_offset -= 1;
1377
0
      }
1378
1379
0
    bfd_put_8 (abfd, nop, contents + nop_offset);
1380
0
    bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1381
    /* When converting to PC-relative relocation, we
1382
       need to adjust addend by -4.  */
1383
0
    bfd_put_32 (abfd, -4, contents + irel->r_offset);
1384
0
    irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1385
0
    *r_type_p = R_386_PC32;
1386
0
    *converted = true;
1387
0
  }
1388
0
    }
1389
0
  else
1390
0
    {
1391
      /* We have "mov foo@GOT[(%re1g)], %reg2",
1392
   "test %reg1, foo@GOT(%reg2)" and
1393
   "binop foo@GOT[(%reg1)], %reg2".
1394
1395
   Avoid optimizing _DYNAMIC since ld.so may use its
1396
   link-time address.  */
1397
0
      if (h == htab->elf.hdynamic)
1398
0
  return true;
1399
1400
      /* def_regular is set by an assignment in a linker script in
1401
   bfd_elf_record_link_assignment.  start_stop is set on
1402
   __start_SECNAME/__stop_SECNAME which mark section SECNAME.  */
1403
0
      if (h->start_stop
1404
0
    || eh->linker_def
1405
0
    || ((h->def_regular
1406
0
         || h->root.type == bfd_link_hash_defined
1407
0
         || h->root.type == bfd_link_hash_defweak)
1408
0
        && local_ref))
1409
0
  {
1410
0
  convert_load:
1411
0
    if (opcode == 0x8b)
1412
0
      {
1413
0
        if (abs_symbol && local_ref)
1414
0
    to_reloc_32 = true;
1415
1416
0
        if (to_reloc_32)
1417
0
    {
1418
      /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1419
         "mov $foo, %reg2" with R_386_32.  */
1420
0
      r_type = R_386_32;
1421
0
      modrm = 0xc0 | (modrm & 0x38) >> 3;
1422
0
      bfd_put_8 (abfd, modrm, contents + roff - 1);
1423
0
      opcode = 0xc7;
1424
0
    }
1425
0
        else
1426
0
    {
1427
      /* Convert "mov foo@GOT(%reg1), %reg2" to
1428
         "lea foo@GOTOFF(%reg1), %reg2".  */
1429
0
      r_type = R_386_GOTOFF;
1430
0
      opcode = 0x8d;
1431
0
    }
1432
0
      }
1433
0
    else
1434
0
      {
1435
        /* Only R_386_32 is supported.  */
1436
0
        if (!to_reloc_32)
1437
0
    return true;
1438
1439
0
        if (opcode == 0x85)
1440
0
    {
1441
      /* Convert "test %reg1, foo@GOT(%reg2)" to
1442
         "test $foo, %reg1".  */
1443
0
      modrm = 0xc0 | (modrm & 0x38) >> 3;
1444
0
      opcode = 0xf7;
1445
0
    }
1446
0
        else
1447
0
    {
1448
      /* Convert "binop foo@GOT(%reg1), %reg2" to
1449
         "binop $foo, %reg2".  */
1450
0
      modrm = (0xc0
1451
0
         | (modrm & 0x38) >> 3
1452
0
         | (opcode & 0x3c));
1453
0
      opcode = 0x81;
1454
0
    }
1455
0
        bfd_put_8 (abfd, modrm, contents + roff - 1);
1456
0
        r_type = R_386_32;
1457
0
      }
1458
1459
0
    bfd_put_8 (abfd, opcode, contents + roff - 2);
1460
0
    irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1461
0
    *r_type_p = r_type;
1462
0
    *converted = true;
1463
0
  }
1464
0
    }
1465
1466
0
  return true;
1467
0
}
1468
1469
/* Look through the relocs for a section during the first phase, and
1470
   calculate needed space in the global offset table, and procedure
1471
   linkage table.  */
1472
1473
static bool
1474
elf_i386_scan_relocs (bfd *abfd,
1475
          struct bfd_link_info *info,
1476
          asection *sec,
1477
          const Elf_Internal_Rela *relocs)
1478
0
{
1479
0
  struct elf_x86_link_hash_table *htab;
1480
0
  Elf_Internal_Shdr *symtab_hdr;
1481
0
  struct elf_link_hash_entry **sym_hashes;
1482
0
  const Elf_Internal_Rela *rel;
1483
0
  const Elf_Internal_Rela *rel_end;
1484
0
  bfd_byte *contents;
1485
0
  bool converted;
1486
1487
0
  if (bfd_link_relocatable (info))
1488
0
    return true;
1489
1490
0
  htab = elf_x86_hash_table (info, I386_ELF_DATA);
1491
0
  if (htab == NULL)
1492
0
    {
1493
0
      sec->check_relocs_failed = 1;
1494
0
      return false;
1495
0
    }
1496
1497
0
  BFD_ASSERT (is_x86_elf (abfd, htab));
1498
1499
  /* Get the section contents.  */
1500
0
  if (elf_section_data (sec)->this_hdr.contents != NULL)
1501
0
    contents = elf_section_data (sec)->this_hdr.contents;
1502
0
  else if (!_bfd_elf_mmap_section_contents (abfd, sec, &contents))
1503
0
    {
1504
0
      sec->check_relocs_failed = 1;
1505
0
      return false;
1506
0
    }
1507
1508
0
  symtab_hdr = &elf_symtab_hdr (abfd);
1509
0
  sym_hashes = elf_sym_hashes (abfd);
1510
1511
0
  converted = false;
1512
1513
0
  rel_end = relocs + sec->reloc_count;
1514
0
  for (rel = relocs; rel < rel_end; rel++)
1515
0
    {
1516
0
      unsigned int r_type;
1517
0
      unsigned int r_symndx;
1518
0
      struct elf_link_hash_entry *h;
1519
0
      struct elf_x86_link_hash_entry *eh;
1520
0
      Elf_Internal_Sym *isym;
1521
0
      const char *name;
1522
0
      bool size_reloc;
1523
0
      bool no_dynreloc;
1524
1525
0
      r_symndx = ELF32_R_SYM (rel->r_info);
1526
0
      r_type = ELF32_R_TYPE (rel->r_info);
1527
1528
      /* Don't check R_386_NONE.  */
1529
0
      if (r_type == R_386_NONE)
1530
0
  continue;
1531
1532
0
      if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1533
0
  {
1534
    /* xgettext:c-format */
1535
0
    _bfd_error_handler (_("%pB: bad symbol index: %d"),
1536
0
            abfd, r_symndx);
1537
0
    goto error_return;
1538
0
  }
1539
1540
0
      if (r_symndx < symtab_hdr->sh_info)
1541
0
  {
1542
    /* A local symbol.  */
1543
0
    isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1544
0
          abfd, r_symndx);
1545
0
    if (isym == NULL)
1546
0
      goto error_return;
1547
1548
    /* Check relocation against local STT_GNU_IFUNC symbol.  */
1549
0
    if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1550
0
      {
1551
0
        h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, true);
1552
0
        if (h == NULL)
1553
0
    goto error_return;
1554
1555
        /* Fake a STT_GNU_IFUNC symbol.  */
1556
0
        h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1557
0
                  isym, NULL);
1558
0
        h->type = STT_GNU_IFUNC;
1559
0
        h->def_regular = 1;
1560
0
        h->ref_regular = 1;
1561
0
        h->forced_local = 1;
1562
0
        h->root.type = bfd_link_hash_defined;
1563
0
      }
1564
0
    else
1565
0
      h = NULL;
1566
0
  }
1567
0
      else
1568
0
  {
1569
0
    isym = NULL;
1570
0
    h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1571
0
    while (h->root.type == bfd_link_hash_indirect
1572
0
     || h->root.type == bfd_link_hash_warning)
1573
0
      h = (struct elf_link_hash_entry *) h->root.u.i.link;
1574
0
  }
1575
1576
0
      eh = (struct elf_x86_link_hash_entry *) h;
1577
0
      if (h != NULL)
1578
0
  {
1579
0
    if (r_type == R_386_GOTOFF)
1580
0
      eh->gotoff_ref = 1;
1581
1582
    /* It is referenced by a non-shared object. */
1583
0
    h->ref_regular = 1;
1584
0
  }
1585
1586
0
      if (r_type == R_386_GOT32X
1587
0
    && (h == NULL || h->type != STT_GNU_IFUNC))
1588
0
  {
1589
0
    Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
1590
0
    if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
1591
0
              &r_type, irel, h,
1592
0
              &converted, info))
1593
0
      goto error_return;
1594
0
  }
1595
1596
0
      if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym,
1597
0
               symtab_hdr, &no_dynreloc))
1598
0
  return false;
1599
1600
0
      if (! elf_i386_tls_transition (info, abfd, sec, contents,
1601
0
             symtab_hdr, sym_hashes,
1602
0
             &r_type, GOT_UNKNOWN,
1603
0
             rel, rel_end, h, r_symndx, false))
1604
0
  goto error_return;
1605
1606
      /* Check if _GLOBAL_OFFSET_TABLE_ is referenced.  */
1607
0
      if (h == htab->elf.hgot)
1608
0
  htab->got_referenced = true;
1609
1610
0
      switch (r_type)
1611
0
  {
1612
0
  case R_386_TLS_LDM:
1613
0
    htab->tls_ld_or_ldm_got.refcount = 1;
1614
0
    goto create_got;
1615
1616
0
  case R_386_PLT32:
1617
    /* This symbol requires a procedure linkage table entry.  We
1618
       actually build the entry in adjust_dynamic_symbol,
1619
       because this might be a case of linking PIC code which is
1620
       never referenced by a dynamic object, in which case we
1621
       don't need to generate a procedure linkage table entry
1622
       after all.  */
1623
1624
    /* If this is a local symbol, we resolve it directly without
1625
       creating a procedure linkage table entry.  */
1626
0
    if (h == NULL)
1627
0
      continue;
1628
1629
0
    eh->zero_undefweak &= 0x2;
1630
0
    h->needs_plt = 1;
1631
0
    h->plt.refcount = 1;
1632
0
    break;
1633
1634
0
  case R_386_SIZE32:
1635
0
    size_reloc = true;
1636
0
    goto do_size;
1637
1638
0
  case R_386_TLS_IE_32:
1639
0
  case R_386_TLS_IE:
1640
0
  case R_386_TLS_GOTIE:
1641
0
    if (!bfd_link_executable (info))
1642
0
      info->flags |= DF_STATIC_TLS;
1643
    /* Fall through */
1644
1645
0
  case R_386_GOT32:
1646
0
  case R_386_GOT32X:
1647
0
  case R_386_TLS_GD:
1648
0
  case R_386_TLS_GOTDESC:
1649
0
  case R_386_TLS_DESC_CALL:
1650
    /* This symbol requires a global offset table entry.  */
1651
0
    {
1652
0
      int tls_type, old_tls_type;
1653
1654
0
      switch (r_type)
1655
0
        {
1656
0
        default:
1657
0
        case R_386_GOT32:
1658
0
        case R_386_GOT32X:
1659
0
    tls_type = GOT_NORMAL;
1660
0
    break;
1661
0
        case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1662
0
        case R_386_TLS_GOTDESC:
1663
0
        case R_386_TLS_DESC_CALL:
1664
0
    tls_type = GOT_TLS_GDESC; break;
1665
0
        case R_386_TLS_IE_32:
1666
0
    if (ELF32_R_TYPE (rel->r_info) == r_type)
1667
0
      tls_type = GOT_TLS_IE_NEG;
1668
0
    else
1669
      /* If this is a GD->IE transition, we may use either of
1670
         R_386_TLS_TPOFF and R_386_TLS_TPOFF32.  */
1671
0
      tls_type = GOT_TLS_IE;
1672
0
    break;
1673
0
        case R_386_TLS_IE:
1674
0
        case R_386_TLS_GOTIE:
1675
0
    tls_type = GOT_TLS_IE_POS; break;
1676
0
        }
1677
1678
0
      if (h != NULL)
1679
0
        {
1680
0
    h->got.refcount = 1;
1681
0
    old_tls_type = elf_x86_hash_entry (h)->tls_type;
1682
0
        }
1683
0
      else
1684
0
        {
1685
0
    bfd_signed_vma *local_got_refcounts;
1686
1687
0
    if (!elf_x86_allocate_local_got_info (abfd,
1688
0
                  symtab_hdr->sh_info))
1689
0
          goto error_return;
1690
1691
    /* This is a global offset table entry for a local symbol.  */
1692
0
    local_got_refcounts = elf_local_got_refcounts (abfd);
1693
0
    local_got_refcounts[r_symndx] = 1;
1694
0
    old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1695
0
        }
1696
1697
0
      if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1698
0
        tls_type |= old_tls_type;
1699
      /* If a TLS symbol is accessed using IE at least once,
1700
         there is no point to use dynamic model for it.  */
1701
0
      else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1702
0
         && (! GOT_TLS_GD_ANY_P (old_tls_type)
1703
0
       || (tls_type & GOT_TLS_IE) == 0))
1704
0
        {
1705
0
    if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1706
0
      tls_type = old_tls_type;
1707
0
    else if (GOT_TLS_GD_ANY_P (old_tls_type)
1708
0
       && GOT_TLS_GD_ANY_P (tls_type))
1709
0
      tls_type |= old_tls_type;
1710
0
    else
1711
0
      {
1712
0
        if (h)
1713
0
          name = h->root.root.string;
1714
0
        else
1715
0
          name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1716
0
               NULL);
1717
0
        _bfd_error_handler
1718
          /* xgettext:c-format */
1719
0
          (_("%pB: `%s' accessed both as normal and "
1720
0
       "thread local symbol"),
1721
0
           abfd, name);
1722
0
        bfd_set_error (bfd_error_bad_value);
1723
0
        goto error_return;
1724
0
      }
1725
0
        }
1726
1727
0
      if (old_tls_type != tls_type)
1728
0
        {
1729
0
    if (h != NULL)
1730
0
      elf_x86_hash_entry (h)->tls_type = tls_type;
1731
0
    else
1732
0
      elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1733
0
        }
1734
0
    }
1735
    /* Fall through */
1736
1737
0
  case R_386_GOTOFF:
1738
0
  case R_386_GOTPC:
1739
0
  create_got:
1740
0
    if (r_type != R_386_TLS_IE)
1741
0
      {
1742
0
        if (eh != NULL)
1743
0
    {
1744
0
      eh->zero_undefweak &= 0x2;
1745
1746
      /* Need GOT to resolve undefined weak symbol to 0.  */
1747
0
      if (r_type == R_386_GOTOFF
1748
0
          && h->root.type == bfd_link_hash_undefweak
1749
0
          && bfd_link_executable (info))
1750
0
        htab->got_referenced = true;
1751
0
    }
1752
0
        break;
1753
0
      }
1754
    /* Fall through */
1755
1756
0
  case R_386_TLS_LE_32:
1757
0
  case R_386_TLS_LE:
1758
0
    if (eh != NULL)
1759
0
      eh->zero_undefweak &= 0x2;
1760
0
    if (bfd_link_executable (info))
1761
0
      break;
1762
0
    info->flags |= DF_STATIC_TLS;
1763
0
    goto do_relocation;
1764
1765
0
  case R_386_32:
1766
0
  case R_386_PC32:
1767
0
    if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1768
0
      eh->zero_undefweak |= 0x2;
1769
0
  do_relocation:
1770
    /* We are called after all symbols have been resolved.  Only
1771
       relocation against STT_GNU_IFUNC symbol must go through
1772
       PLT.  */
1773
0
    if (h != NULL
1774
0
        && (bfd_link_executable (info)
1775
0
      || h->type == STT_GNU_IFUNC))
1776
0
      {
1777
0
        bool func_pointer_ref = false;
1778
1779
0
        if (r_type == R_386_PC32)
1780
0
    {
1781
      /* Since something like ".long foo - ." may be used
1782
         as pointer, make sure that PLT is used if foo is
1783
         a function defined in a shared library.  */
1784
0
      if ((sec->flags & SEC_CODE) == 0)
1785
0
        h->pointer_equality_needed = 1;
1786
0
      else if (h->type == STT_GNU_IFUNC
1787
0
         && bfd_link_pic (info))
1788
0
        {
1789
0
          _bfd_error_handler
1790
      /* xgettext:c-format */
1791
0
      (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
1792
0
       abfd, h->root.root.string);
1793
0
          bfd_set_error (bfd_error_bad_value);
1794
0
          goto error_return;
1795
0
        }
1796
0
    }
1797
0
        else
1798
0
    {
1799
      /* R_386_32 can be resolved at run-time.  Function
1800
         pointer reference doesn't need PLT for pointer
1801
         equality.  */
1802
0
      if (r_type == R_386_32
1803
0
          && (sec->flags & SEC_READONLY) == 0)
1804
0
        func_pointer_ref = true;
1805
1806
      /* IFUNC symbol needs pointer equality in PDE so that
1807
         function pointer reference will be resolved to its
1808
         PLT entry directly.  */
1809
0
      if (!func_pointer_ref
1810
0
          || (bfd_link_pde (info)
1811
0
        && h->type == STT_GNU_IFUNC))
1812
0
        h->pointer_equality_needed = 1;
1813
0
    }
1814
1815
0
        if (!func_pointer_ref)
1816
0
    {
1817
      /* If this reloc is in a read-only section, we might
1818
         need a copy reloc.  We can't check reliably at this
1819
         stage whether the section is read-only, as input
1820
         sections have not yet been mapped to output sections.
1821
         Tentatively set the flag for now, and correct in
1822
         adjust_dynamic_symbol.  */
1823
0
      h->non_got_ref = 1;
1824
1825
0
      if (!elf_has_indirect_extern_access (sec->owner))
1826
0
        eh->non_got_ref_without_indirect_extern_access = 1;
1827
1828
      /* We may need a .plt entry if the symbol is a function
1829
         defined in a shared lib or is a function referenced
1830
         from the code or read-only section.  */
1831
0
      if (!h->def_regular
1832
0
          || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1833
0
        h->plt.refcount = 1;
1834
1835
0
      if (htab->elf.target_os != is_solaris
1836
0
          && h->pointer_equality_needed
1837
0
          && h->type == STT_FUNC
1838
0
          && eh->def_protected
1839
0
          && !SYMBOL_DEFINED_NON_SHARED_P (h)
1840
0
          && h->def_dynamic)
1841
0
        {
1842
          /* Disallow non-canonical reference to canonical
1843
       protected function.  */
1844
0
          _bfd_error_handler
1845
      /* xgettext:c-format */
1846
0
      (_("%pB: non-canonical reference to canonical "
1847
0
         "protected function `%s' in %pB"),
1848
0
       abfd, h->root.root.string,
1849
0
       h->root.u.def.section->owner);
1850
0
          bfd_set_error (bfd_error_bad_value);
1851
0
          goto error_return;
1852
0
        }
1853
0
    }
1854
0
      }
1855
1856
0
    size_reloc = false;
1857
0
  do_size:
1858
0
    if (!no_dynreloc
1859
0
        && NEED_DYNAMIC_RELOCATION_P (false, info, false, h, sec,
1860
0
              r_type, R_386_32))
1861
0
      {
1862
0
        struct elf_dyn_relocs *p;
1863
0
        struct elf_dyn_relocs **head;
1864
1865
        /* If this is a global symbol, we count the number of
1866
     relocations we need for this symbol.  */
1867
0
        if (h != NULL)
1868
0
    {
1869
0
      head = &h->dyn_relocs;
1870
0
    }
1871
0
        else
1872
0
    {
1873
      /* Track dynamic relocs needed for local syms too.
1874
         We really need local syms available to do this
1875
         easily.  Oh well.  */
1876
0
      void **vpp;
1877
0
      asection *s;
1878
1879
0
      isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1880
0
            abfd, r_symndx);
1881
0
      if (isym == NULL)
1882
0
        goto error_return;
1883
1884
0
      s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1885
0
      if (s == NULL)
1886
0
        s = sec;
1887
1888
0
      vpp = &elf_section_data (s)->local_dynrel;
1889
0
      head = (struct elf_dyn_relocs **)vpp;
1890
0
    }
1891
1892
0
        p = *head;
1893
0
        if (p == NULL || p->sec != sec)
1894
0
    {
1895
0
      size_t amt = sizeof *p;
1896
0
      p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1897
0
                 amt);
1898
0
      if (p == NULL)
1899
0
        goto error_return;
1900
0
      p->next = *head;
1901
0
      *head = p;
1902
0
      p->sec = sec;
1903
0
      p->count = 0;
1904
0
      p->pc_count = 0;
1905
0
    }
1906
1907
0
        p->count += 1;
1908
        /* Count size relocation as PC-relative relocation.  */
1909
0
        if (r_type == R_386_PC32 || size_reloc)
1910
0
    p->pc_count += 1;
1911
0
      }
1912
0
    break;
1913
1914
    /* This relocation describes the C++ object vtable hierarchy.
1915
       Reconstruct it for later use during GC.  */
1916
0
  case R_386_GNU_VTINHERIT:
1917
0
    if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1918
0
      goto error_return;
1919
0
    break;
1920
1921
    /* This relocation describes which C++ vtable entries are actually
1922
       used.  Record for later use during GC.  */
1923
0
  case R_386_GNU_VTENTRY:
1924
0
    if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1925
0
      goto error_return;
1926
0
    break;
1927
1928
0
  default:
1929
0
    break;
1930
0
  }
1931
0
    }
1932
1933
0
  if (elf_section_data (sec)->this_hdr.contents != contents)
1934
0
    {
1935
0
      if (!converted)
1936
0
  _bfd_elf_munmap_section_contents (sec, contents);
1937
0
      else
1938
0
  {
1939
    /* Cache the section contents for elf_link_input_bfd if any
1940
       load is converted or --no-keep-memory isn't used.  */
1941
0
    elf_section_data (sec)->this_hdr.contents = contents;
1942
0
    info->cache_size += sec->size;
1943
0
  }
1944
0
    }
1945
1946
  /* Cache relocations if any load is converted.  */
1947
0
  if (elf_section_data (sec)->relocs != relocs && converted)
1948
0
    elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
1949
1950
0
  return true;
1951
1952
0
 error_return:
1953
0
  if (elf_section_data (sec)->this_hdr.contents != contents)
1954
0
    _bfd_elf_munmap_section_contents (sec, contents);
1955
0
  sec->check_relocs_failed = 1;
1956
0
  return false;
1957
0
}
1958
1959
static bool
1960
elf_i386_early_size_sections (bfd *output_bfd, struct bfd_link_info *info)
1961
0
{
1962
0
  bfd *abfd;
1963
1964
  /* Scan relocations after rel_from_abs has been set on __ehdr_start.  */
1965
0
  for (abfd = info->input_bfds;
1966
0
       abfd != (bfd *) NULL;
1967
0
       abfd = abfd->link.next)
1968
0
    if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1969
0
  && !_bfd_elf_link_iterate_on_relocs (abfd, info,
1970
0
               elf_i386_scan_relocs))
1971
0
      return false;
1972
1973
0
  return _bfd_x86_elf_early_size_sections (output_bfd, info);
1974
0
}
1975
1976
/* Set the correct type for an x86 ELF section.  We do this by the
1977
   section name, which is a hack, but ought to work.  */
1978
1979
static bool
1980
elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1981
      Elf_Internal_Shdr *hdr,
1982
      asection *sec)
1983
49
{
1984
49
  const char *name;
1985
1986
49
  name = bfd_section_name (sec);
1987
1988
  /* This is an ugly, but unfortunately necessary hack that is
1989
     needed when producing EFI binaries on x86. It tells
1990
     elf.c:elf_fake_sections() not to consider ".reloc" as a section
1991
     containing ELF relocation info.  We need this hack in order to
1992
     be able to generate ELF binaries that can be translated into
1993
     EFI applications (which are essentially COFF objects).  Those
1994
     files contain a COFF ".reloc" section inside an ELFNN object,
1995
     which would normally cause BFD to segfault because it would
1996
     attempt to interpret this section as containing relocation
1997
     entries for section "oc".  With this hack enabled, ".reloc"
1998
     will be treated as a normal data section, which will avoid the
1999
     segfault.  However, you won't be able to create an ELFNN binary
2000
     with a section named "oc" that needs relocations, but that's
2001
     the kind of ugly side-effects you get when detecting section
2002
     types based on their names...  In practice, this limitation is
2003
     unlikely to bite.  */
2004
49
  if (strcmp (name, ".reloc") == 0)
2005
0
    hdr->sh_type = SHT_PROGBITS;
2006
2007
49
  return true;
2008
49
}
2009
2010
/* Return the relocation value for @tpoff relocation
2011
   if STT_TLS virtual address is ADDRESS.  */
2012
2013
static bfd_vma
2014
elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2015
0
{
2016
0
  struct elf_link_hash_table *htab = elf_hash_table (info);
2017
0
  const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2018
0
  bfd_vma static_tls_size;
2019
2020
  /* If tls_sec is NULL, we should have signalled an error already.  */
2021
0
  if (htab->tls_sec == NULL)
2022
0
    return 0;
2023
2024
  /* Consider special static TLS alignment requirements.  */
2025
0
  static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2026
0
  return static_tls_size + htab->tls_sec->vma - address;
2027
0
}
2028
2029
/* Relocate an i386 ELF section.  */
2030
2031
static int
2032
elf_i386_relocate_section (bfd *output_bfd,
2033
         struct bfd_link_info *info,
2034
         bfd *input_bfd,
2035
         asection *input_section,
2036
         bfd_byte *contents,
2037
         Elf_Internal_Rela *relocs,
2038
         Elf_Internal_Sym *local_syms,
2039
         asection **local_sections)
2040
0
{
2041
0
  struct elf_x86_link_hash_table *htab;
2042
0
  Elf_Internal_Shdr *symtab_hdr;
2043
0
  struct elf_link_hash_entry **sym_hashes;
2044
0
  bfd_vma *local_got_offsets;
2045
0
  bfd_vma *local_tlsdesc_gotents;
2046
0
  Elf_Internal_Rela *rel;
2047
0
  Elf_Internal_Rela *wrel;
2048
0
  Elf_Internal_Rela *relend;
2049
0
  bool is_vxworks_tls;
2050
0
  unsigned expected_tls_le;
2051
0
  unsigned plt_entry_size;
2052
2053
  /* Skip if check_relocs or scan_relocs failed.  */
2054
0
  if (input_section->check_relocs_failed)
2055
0
    return false;
2056
2057
0
  htab = elf_x86_hash_table (info, I386_ELF_DATA);
2058
0
  if (htab == NULL)
2059
0
    return false;
2060
2061
0
  if (!is_x86_elf (input_bfd, htab))
2062
0
    {
2063
0
      bfd_set_error (bfd_error_wrong_format);
2064
0
      return false;
2065
0
    }
2066
2067
0
  symtab_hdr = &elf_symtab_hdr (input_bfd);
2068
0
  sym_hashes = elf_sym_hashes (input_bfd);
2069
0
  local_got_offsets = elf_local_got_offsets (input_bfd);
2070
0
  local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
2071
  /* We have to handle relocations in vxworks .tls_vars sections
2072
     specially, because the dynamic loader is 'weird'.  */
2073
0
  is_vxworks_tls = (htab->elf.target_os == is_vxworks
2074
0
        && bfd_link_pic (info)
2075
0
        && !strcmp (input_section->output_section->name,
2076
0
        ".tls_vars"));
2077
2078
0
  _bfd_x86_elf_set_tls_module_base (info);
2079
2080
0
  plt_entry_size = htab->plt.plt_entry_size;
2081
2082
0
  rel = wrel = relocs;
2083
0
  relend = relocs + input_section->reloc_count;
2084
0
  for (; rel < relend; wrel++, rel++)
2085
0
    {
2086
0
      unsigned int r_type, r_type_tls;
2087
0
      reloc_howto_type *howto;
2088
0
      unsigned long r_symndx;
2089
0
      struct elf_link_hash_entry *h;
2090
0
      struct elf_x86_link_hash_entry *eh;
2091
0
      Elf_Internal_Sym *sym;
2092
0
      asection *sec;
2093
0
      bfd_vma off, offplt, plt_offset;
2094
0
      bfd_vma relocation;
2095
0
      bool unresolved_reloc;
2096
0
      bfd_reloc_status_type r;
2097
0
      unsigned int indx;
2098
0
      int tls_type;
2099
0
      bfd_vma st_size;
2100
0
      asection *resolved_plt;
2101
0
      bool resolved_to_zero;
2102
0
      bool relative_reloc;
2103
2104
0
      r_type = ELF32_R_TYPE (rel->r_info);
2105
0
      if (r_type == R_386_GNU_VTINHERIT
2106
0
    || r_type == R_386_GNU_VTENTRY)
2107
0
  {
2108
0
    if (wrel != rel)
2109
0
      *wrel = *rel;
2110
0
    continue;
2111
0
  }
2112
2113
0
      howto = elf_i386_rtype_to_howto (r_type);
2114
0
      if (howto == NULL)
2115
0
  return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2116
2117
0
      r_symndx = ELF32_R_SYM (rel->r_info);
2118
0
      h = NULL;
2119
0
      sym = NULL;
2120
0
      sec = NULL;
2121
0
      unresolved_reloc = false;
2122
0
      if (r_symndx < symtab_hdr->sh_info)
2123
0
  {
2124
0
    sym = local_syms + r_symndx;
2125
0
    sec = local_sections[r_symndx];
2126
0
    relocation = (sec->output_section->vma
2127
0
      + sec->output_offset
2128
0
      + sym->st_value);
2129
0
    st_size = sym->st_size;
2130
2131
0
    if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2132
0
        && ((sec->flags & SEC_MERGE) != 0
2133
0
      || (bfd_link_relocatable (info)
2134
0
          && sec->output_offset != 0)))
2135
0
      {
2136
0
        bfd_vma addend;
2137
0
        bfd_byte *where = contents + rel->r_offset;
2138
2139
0
        switch (bfd_get_reloc_size (howto))
2140
0
    {
2141
0
    case 1:
2142
0
      addend = bfd_get_8 (input_bfd, where);
2143
0
      if (howto->pc_relative)
2144
0
        {
2145
0
          addend = (addend ^ 0x80) - 0x80;
2146
0
          addend += 1;
2147
0
        }
2148
0
      break;
2149
0
    case 2:
2150
0
      addend = bfd_get_16 (input_bfd, where);
2151
0
      if (howto->pc_relative)
2152
0
        {
2153
0
          addend = (addend ^ 0x8000) - 0x8000;
2154
0
          addend += 2;
2155
0
        }
2156
0
      break;
2157
0
    case 4:
2158
0
      addend = bfd_get_32 (input_bfd, where);
2159
0
      if (howto->pc_relative)
2160
0
        {
2161
0
          addend = (addend ^ 0x80000000) - 0x80000000;
2162
0
          addend += 4;
2163
0
        }
2164
0
      break;
2165
0
    default:
2166
0
      abort ();
2167
0
    }
2168
2169
0
        if (bfd_link_relocatable (info))
2170
0
    addend += sec->output_offset;
2171
0
        else
2172
0
    {
2173
0
      asection *msec = sec;
2174
0
      addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2175
0
               addend);
2176
0
      addend -= relocation;
2177
0
      addend += msec->output_section->vma + msec->output_offset;
2178
0
    }
2179
2180
0
        switch (bfd_get_reloc_size (howto))
2181
0
    {
2182
0
    case 1:
2183
      /* FIXME: overflow checks.  */
2184
0
      if (howto->pc_relative)
2185
0
        addend -= 1;
2186
0
      bfd_put_8 (input_bfd, addend, where);
2187
0
      break;
2188
0
    case 2:
2189
0
      if (howto->pc_relative)
2190
0
        addend -= 2;
2191
0
      bfd_put_16 (input_bfd, addend, where);
2192
0
      break;
2193
0
    case 4:
2194
0
      if (howto->pc_relative)
2195
0
        addend -= 4;
2196
0
      bfd_put_32 (input_bfd, addend, where);
2197
0
      break;
2198
0
    }
2199
0
      }
2200
0
    else if (!bfd_link_relocatable (info)
2201
0
       && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2202
0
      {
2203
        /* Relocate against local STT_GNU_IFUNC symbol.  */
2204
0
        h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2205
0
               false);
2206
0
        if (h == NULL)
2207
0
    abort ();
2208
2209
        /* Set STT_GNU_IFUNC symbol value.  */
2210
0
        h->root.u.def.value = sym->st_value;
2211
0
        h->root.u.def.section = sec;
2212
0
      }
2213
0
  }
2214
0
      else
2215
0
  {
2216
0
    bool warned ATTRIBUTE_UNUSED;
2217
0
    bool ignored ATTRIBUTE_UNUSED;
2218
2219
0
    RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2220
0
           r_symndx, symtab_hdr, sym_hashes,
2221
0
           h, sec, relocation,
2222
0
           unresolved_reloc, warned, ignored);
2223
0
    st_size = h->size;
2224
0
  }
2225
2226
0
      if (sec != NULL && discarded_section (sec))
2227
0
  {
2228
0
    _bfd_clear_contents (howto, input_bfd, input_section,
2229
0
             contents, rel->r_offset);
2230
0
    wrel->r_offset = rel->r_offset;
2231
0
    wrel->r_info = 0;
2232
0
    wrel->r_addend = 0;
2233
2234
    /* For ld -r, remove relocations in debug sections against
2235
       sections defined in discarded sections.  Not done for
2236
       eh_frame editing code expects to be present.  */
2237
0
     if (bfd_link_relocatable (info)
2238
0
         && (input_section->flags & SEC_DEBUGGING))
2239
0
       wrel--;
2240
2241
0
     continue;
2242
0
  }
2243
2244
0
      if (bfd_link_relocatable (info))
2245
0
  {
2246
0
    if (wrel != rel)
2247
0
      *wrel = *rel;
2248
0
    continue;
2249
0
  }
2250
2251
0
      eh = (struct elf_x86_link_hash_entry *) h;
2252
2253
      /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2254
   it here if it is defined in a non-shared object.  */
2255
0
      if (h != NULL
2256
0
    && h->type == STT_GNU_IFUNC
2257
0
    && h->def_regular)
2258
0
  {
2259
0
    asection *gotplt, *base_got;
2260
0
    bfd_vma plt_index;
2261
0
    const char *name;
2262
2263
0
    if ((input_section->flags & SEC_ALLOC) == 0)
2264
0
      {
2265
        /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2266
           STT_GNU_IFUNC symbol as STT_FUNC.  */
2267
0
        if (elf_section_type (input_section) == SHT_NOTE)
2268
0
    goto skip_ifunc;
2269
        /* Dynamic relocs are not propagated for SEC_DEBUGGING
2270
     sections because such sections are not SEC_ALLOC and
2271
     thus ld.so will not process them.  */
2272
0
        if ((input_section->flags & SEC_DEBUGGING) != 0)
2273
0
    continue;
2274
0
        abort ();
2275
0
      }
2276
2277
    /* STT_GNU_IFUNC symbol must go through PLT.  */
2278
0
    if (htab->elf.splt != NULL)
2279
0
      {
2280
0
        if (htab->plt_second != NULL)
2281
0
    {
2282
0
      resolved_plt = htab->plt_second;
2283
0
      plt_offset = eh->plt_second.offset;
2284
0
    }
2285
0
        else
2286
0
    {
2287
0
      resolved_plt = htab->elf.splt;
2288
0
      plt_offset = h->plt.offset;
2289
0
    }
2290
0
        gotplt = htab->elf.sgotplt;
2291
0
      }
2292
0
    else
2293
0
      {
2294
0
        resolved_plt = htab->elf.iplt;
2295
0
        plt_offset = h->plt.offset;
2296
0
        gotplt = htab->elf.igotplt;
2297
0
      }
2298
2299
0
    switch (r_type)
2300
0
      {
2301
0
      default:
2302
0
        break;
2303
2304
0
      case R_386_GOT32:
2305
0
      case R_386_GOT32X:
2306
0
        base_got = htab->elf.sgot;
2307
0
        off = h->got.offset;
2308
2309
0
        if (base_got == NULL)
2310
0
    abort ();
2311
2312
0
        if (off == (bfd_vma) -1)
2313
0
    {
2314
      /* We can't use h->got.offset here to save state, or
2315
         even just remember the offset, as finish_dynamic_symbol
2316
         would use that as offset into .got.  */
2317
2318
0
      if (h->plt.offset == (bfd_vma) -1)
2319
0
        abort ();
2320
2321
0
      if (htab->elf.splt != NULL)
2322
0
        {
2323
0
          plt_index = (h->plt.offset / plt_entry_size
2324
0
           - htab->plt.has_plt0);
2325
0
          off = (plt_index + 3) * 4;
2326
0
          base_got = htab->elf.sgotplt;
2327
0
        }
2328
0
      else
2329
0
        {
2330
0
          plt_index = h->plt.offset / plt_entry_size;
2331
0
          off = plt_index * 4;
2332
0
          base_got = htab->elf.igotplt;
2333
0
        }
2334
2335
0
      if (h->dynindx == -1
2336
0
          || h->forced_local
2337
0
          || info->symbolic)
2338
0
        {
2339
          /* This references the local defitionion.  We must
2340
       initialize this entry in the global offset table.
2341
       Since the offset must always be a multiple of 4,
2342
       we use the least significant bit to record
2343
       whether we have initialized it already.
2344
2345
       When doing a dynamic link, we create a .rela.got
2346
       relocation entry to initialize the value.  This
2347
       is done in the finish_dynamic_symbol routine.   */
2348
0
          if ((off & 1) != 0)
2349
0
      off &= ~1;
2350
0
          else
2351
0
      {
2352
0
        bfd_put_32 (output_bfd, relocation,
2353
0
              base_got->contents + off);
2354
0
        h->got.offset |= 1;
2355
0
      }
2356
0
        }
2357
2358
0
      relocation = off;
2359
0
    }
2360
0
        else
2361
0
    relocation = (base_got->output_section->vma
2362
0
            + base_got->output_offset + off
2363
0
            - gotplt->output_section->vma
2364
0
            - gotplt->output_offset);
2365
2366
0
        if (rel->r_offset > 1
2367
0
      && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2368
0
      && *(contents + rel->r_offset - 2) != 0x8d)
2369
0
    {
2370
0
      if (bfd_link_pic (info))
2371
0
        goto disallow_got32;
2372
2373
      /* Add the GOT base if there is no base register.  */
2374
0
      relocation += (gotplt->output_section->vma
2375
0
         + gotplt->output_offset);
2376
0
    }
2377
0
        else if (htab->elf.splt == NULL)
2378
0
    {
2379
      /* Adjust for static executables.  */
2380
0
      relocation += gotplt->output_offset;
2381
0
    }
2382
2383
0
        goto do_relocation;
2384
0
      }
2385
2386
0
    if (h->plt.offset == (bfd_vma) -1)
2387
0
      {
2388
        /* Handle static pointers of STT_GNU_IFUNC symbols.  */
2389
0
        if (r_type == R_386_32
2390
0
      && (input_section->flags & SEC_CODE) == 0)
2391
0
    goto do_ifunc_pointer;
2392
0
        goto bad_ifunc_reloc;
2393
0
      }
2394
2395
0
    relocation = (resolved_plt->output_section->vma
2396
0
      + resolved_plt->output_offset + plt_offset);
2397
2398
0
    switch (r_type)
2399
0
      {
2400
0
      default:
2401
0
      bad_ifunc_reloc:
2402
0
        if (h->root.root.string)
2403
0
    name = h->root.root.string;
2404
0
        else
2405
0
    name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2406
0
           NULL);
2407
0
        _bfd_error_handler
2408
    /* xgettext:c-format */
2409
0
    (_("%pB: relocation %s against STT_GNU_IFUNC "
2410
0
       "symbol `%s' isn't supported"), input_bfd,
2411
0
     howto->name, name);
2412
0
        bfd_set_error (bfd_error_bad_value);
2413
0
        return false;
2414
2415
0
      case R_386_32:
2416
        /* Generate dynamic relcoation only when there is a
2417
     non-GOT reference in a shared object.  */
2418
0
        if ((bfd_link_pic (info) && h->non_got_ref)
2419
0
      || h->plt.offset == (bfd_vma) -1)
2420
0
    {
2421
0
      Elf_Internal_Rela outrel;
2422
0
      asection *sreloc;
2423
0
      bfd_vma offset;
2424
2425
0
    do_ifunc_pointer:
2426
      /* Need a dynamic relocation to get the real function
2427
         adddress.  */
2428
0
      offset = _bfd_elf_section_offset (output_bfd,
2429
0
                info,
2430
0
                input_section,
2431
0
                rel->r_offset);
2432
0
      if (offset == (bfd_vma) -1
2433
0
          || offset == (bfd_vma) -2)
2434
0
        abort ();
2435
2436
0
      outrel.r_offset = (input_section->output_section->vma
2437
0
             + input_section->output_offset
2438
0
             + offset);
2439
2440
0
      if (POINTER_LOCAL_IFUNC_P (info, h))
2441
0
        {
2442
0
          info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
2443
0
                h->root.root.string,
2444
0
                h->root.u.def.section->owner);
2445
2446
          /* This symbol is resolved locally.  */
2447
0
          outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2448
2449
0
          if (htab->params->report_relative_reloc)
2450
0
      _bfd_x86_elf_link_report_relative_reloc
2451
0
        (info, input_section, h, sym,
2452
0
         "R_386_IRELATIVE", &outrel);
2453
2454
0
          bfd_put_32 (output_bfd,
2455
0
          (h->root.u.def.value
2456
0
           + h->root.u.def.section->output_section->vma
2457
0
           + h->root.u.def.section->output_offset),
2458
0
          contents + offset);
2459
0
        }
2460
0
      else
2461
0
        outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2462
2463
      /* Dynamic relocations are stored in
2464
         1. .rel.ifunc section in PIC object.
2465
         2. .rel.got section in dynamic executable.
2466
         3. .rel.iplt section in static executable.  */
2467
0
      if (bfd_link_pic (info))
2468
0
        sreloc = htab->elf.irelifunc;
2469
0
      else if (htab->elf.splt != NULL)
2470
0
        sreloc = htab->elf.srelgot;
2471
0
      else
2472
0
        sreloc = htab->elf.irelplt;
2473
0
      elf_append_rel (output_bfd, sreloc, &outrel);
2474
2475
      /* If this reloc is against an external symbol, we
2476
         do not want to fiddle with the addend.  Otherwise,
2477
         we need to include the symbol value so that it
2478
         becomes an addend for the dynamic reloc.  For an
2479
         internal symbol, we have updated addend.  */
2480
0
      continue;
2481
0
    }
2482
        /* FALLTHROUGH */
2483
0
      case R_386_PC32:
2484
0
      case R_386_PLT32:
2485
0
        goto do_relocation;
2486
2487
0
      case R_386_GOTOFF:
2488
        /* NB: We can't use the PLT entry as the function address
2489
     for PIC since the PIC register may not be set up
2490
     properly for indirect call. */
2491
0
        if (bfd_link_pic (info))
2492
0
    goto bad_ifunc_reloc;
2493
0
        relocation -= (gotplt->output_section->vma
2494
0
           + gotplt->output_offset);
2495
0
        goto do_relocation;
2496
0
      }
2497
0
  }
2498
2499
0
    skip_ifunc:
2500
0
      resolved_to_zero = (eh != NULL
2501
0
        && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
2502
2503
0
      switch (r_type)
2504
0
  {
2505
0
  case R_386_GOT32X:
2506
0
  case R_386_GOT32:
2507
    /* Relocation is to the entry for this symbol in the global
2508
       offset table.  */
2509
0
    if (htab->elf.sgot == NULL)
2510
0
      abort ();
2511
2512
0
    relative_reloc = false;
2513
0
    if (h != NULL)
2514
0
      {
2515
0
        off = h->got.offset;
2516
0
        if (RESOLVED_LOCALLY_P (info, h, htab))
2517
0
    {
2518
      /* We must initialize this entry in the global offset
2519
         table.  Since the offset must always be a multiple
2520
         of 4, we use the least significant bit to record
2521
         whether we have initialized it already.
2522
2523
         When doing a dynamic link, we create a .rel.got
2524
         relocation entry to initialize the value.  This
2525
         is done in the finish_dynamic_symbol routine.  */
2526
0
      if ((off & 1) != 0)
2527
0
        off &= ~1;
2528
0
      else
2529
0
        {
2530
0
          bfd_put_32 (output_bfd, relocation,
2531
0
          htab->elf.sgot->contents + off);
2532
0
          h->got.offset |= 1;
2533
          /* NB: Don't generate relative relocation here if
2534
       it has been generated by DT_RELR.  */
2535
0
          if (!info->enable_dt_relr
2536
0
        && GENERATE_RELATIVE_RELOC_P (info, h))
2537
0
      {
2538
        /* PR ld/21402: If this symbol isn't dynamic
2539
           in PIC, generate R_386_RELATIVE here.  */
2540
0
        eh->no_finish_dynamic_symbol = 1;
2541
0
        relative_reloc = true;
2542
0
      }
2543
0
        }
2544
0
    }
2545
0
        else
2546
0
    unresolved_reloc = false;
2547
0
      }
2548
0
    else
2549
0
      {
2550
0
        if (local_got_offsets == NULL)
2551
0
    abort ();
2552
2553
0
        off = local_got_offsets[r_symndx];
2554
2555
        /* The offset must always be a multiple of 4.  We use
2556
     the least significant bit to record whether we have
2557
     already generated the necessary reloc.  */
2558
0
        if ((off & 1) != 0)
2559
0
    off &= ~1;
2560
0
        else
2561
0
    {
2562
0
      bfd_put_32 (output_bfd, relocation,
2563
0
            htab->elf.sgot->contents + off);
2564
0
      local_got_offsets[r_symndx] |= 1;
2565
2566
      /* NB: Don't generate relative relocation here if it
2567
         has been generated by DT_RELR.  */
2568
0
      if (!info->enable_dt_relr && bfd_link_pic (info))
2569
0
        relative_reloc = true;
2570
0
    }
2571
0
      }
2572
2573
0
    if (relative_reloc)
2574
0
      {
2575
0
        asection *s;
2576
0
        Elf_Internal_Rela outrel;
2577
2578
0
        s = htab->elf.srelgot;
2579
0
        if (s == NULL)
2580
0
    abort ();
2581
2582
0
        outrel.r_offset = (htab->elf.sgot->output_section->vma
2583
0
         + htab->elf.sgot->output_offset
2584
0
         + off);
2585
0
        outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2586
2587
0
        if (htab->params->report_relative_reloc)
2588
0
    _bfd_x86_elf_link_report_relative_reloc
2589
0
      (info, input_section, h, sym, "R_386_RELATIVE",
2590
0
       &outrel);
2591
2592
0
        elf_append_rel (output_bfd, s, &outrel);
2593
0
      }
2594
2595
0
    if (off >= (bfd_vma) -2)
2596
0
      abort ();
2597
2598
0
    relocation = (htab->elf.sgot->output_section->vma
2599
0
      + htab->elf.sgot->output_offset + off);
2600
0
    if (rel->r_offset > 1
2601
0
        && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2602
0
        && *(contents + rel->r_offset - 2) != 0x8d)
2603
0
      {
2604
0
        if (bfd_link_pic (info))
2605
0
    {
2606
      /* For PIC, disallow R_386_GOT32 without a base
2607
         register, except for "lea foo@GOT, %reg", since
2608
         we don't know what the GOT base is.  */
2609
0
      const char *name;
2610
2611
0
    disallow_got32:
2612
0
      if (h == NULL || h->root.root.string == NULL)
2613
0
        name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2614
0
               NULL);
2615
0
      else
2616
0
        name = h->root.root.string;
2617
2618
0
      _bfd_error_handler
2619
        /* xgettext:c-format */
2620
0
        (_("%pB: direct GOT relocation %s against `%s'"
2621
0
           " without base register can not be used"
2622
0
           " when making a shared object"),
2623
0
         input_bfd, howto->name, name);
2624
0
      bfd_set_error (bfd_error_bad_value);
2625
0
      return false;
2626
0
    }
2627
0
      }
2628
0
    else
2629
0
      {
2630
        /* Subtract the .got.plt section address only with a base
2631
     register.  */
2632
0
        relocation -= (htab->elf.sgotplt->output_section->vma
2633
0
           + htab->elf.sgotplt->output_offset);
2634
0
      }
2635
2636
0
    break;
2637
2638
0
  case R_386_GOTOFF:
2639
    /* Relocation is relative to the start of the global offset
2640
       table.  */
2641
2642
    /* Check to make sure it isn't a protected function or data
2643
       symbol for shared library since it may not be local when
2644
       used as function address or with copy relocation.  We also
2645
       need to make sure that a symbol is referenced locally.  */
2646
0
    if (!bfd_link_executable (info) && h)
2647
0
      {
2648
0
        if (!h->def_regular)
2649
0
    {
2650
0
      const char *v;
2651
2652
0
      switch (ELF_ST_VISIBILITY (h->other))
2653
0
        {
2654
0
        case STV_HIDDEN:
2655
0
          v = _("hidden symbol");
2656
0
          break;
2657
0
        case STV_INTERNAL:
2658
0
          v = _("internal symbol");
2659
0
          break;
2660
0
        case STV_PROTECTED:
2661
0
          v = _("protected symbol");
2662
0
          break;
2663
0
        default:
2664
0
          v = _("symbol");
2665
0
          break;
2666
0
        }
2667
2668
0
      _bfd_error_handler
2669
        /* xgettext:c-format */
2670
0
        (_("%pB: relocation R_386_GOTOFF against undefined %s"
2671
0
           " `%s' can not be used when making a shared object"),
2672
0
         input_bfd, v, h->root.root.string);
2673
0
      bfd_set_error (bfd_error_bad_value);
2674
0
      return false;
2675
0
    }
2676
0
        else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
2677
0
           && (h->type == STT_FUNC
2678
0
         || h->type == STT_OBJECT)
2679
0
           && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2680
0
    {
2681
0
      _bfd_error_handler
2682
        /* xgettext:c-format */
2683
0
        (_("%pB: relocation R_386_GOTOFF against protected %s"
2684
0
           " `%s' can not be used when making a shared object"),
2685
0
         input_bfd,
2686
0
         h->type == STT_FUNC ? "function" : "data",
2687
0
         h->root.root.string);
2688
0
      bfd_set_error (bfd_error_bad_value);
2689
0
      return false;
2690
0
    }
2691
0
      }
2692
2693
    /* Note that sgot is not involved in this
2694
       calculation.  We always want the start of .got.plt.  If we
2695
       defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2696
       permitted by the ABI, we might have to change this
2697
       calculation.  */
2698
0
    relocation -= htab->elf.sgotplt->output_section->vma
2699
0
      + htab->elf.sgotplt->output_offset;
2700
0
    break;
2701
2702
0
  case R_386_GOTPC:
2703
    /* Use global offset table as symbol value.  */
2704
0
    relocation = htab->elf.sgotplt->output_section->vma
2705
0
           + htab->elf.sgotplt->output_offset;
2706
0
    unresolved_reloc = false;
2707
0
    break;
2708
2709
0
  case R_386_PLT32:
2710
    /* Relocation is to the entry for this symbol in the
2711
       procedure linkage table.  */
2712
2713
    /* Resolve a PLT32 reloc against a local symbol directly,
2714
       without using the procedure linkage table.  */
2715
0
    if (h == NULL)
2716
0
      break;
2717
2718
0
    if ((h->plt.offset == (bfd_vma) -1
2719
0
         && eh->plt_got.offset == (bfd_vma) -1)
2720
0
        || htab->elf.splt == NULL)
2721
0
      {
2722
        /* We didn't make a PLT entry for this symbol.  This
2723
     happens when statically linking PIC code, or when
2724
     using -Bsymbolic.  */
2725
0
        break;
2726
0
      }
2727
2728
0
    if (h->plt.offset != (bfd_vma) -1)
2729
0
      {
2730
0
        if (htab->plt_second != NULL)
2731
0
    {
2732
0
      resolved_plt = htab->plt_second;
2733
0
      plt_offset = eh->plt_second.offset;
2734
0
    }
2735
0
        else
2736
0
    {
2737
0
      resolved_plt = htab->elf.splt;
2738
0
      plt_offset = h->plt.offset;
2739
0
    }
2740
0
      }
2741
0
    else
2742
0
      {
2743
0
        resolved_plt = htab->plt_got;
2744
0
        plt_offset = eh->plt_got.offset;
2745
0
      }
2746
2747
0
    relocation = (resolved_plt->output_section->vma
2748
0
      + resolved_plt->output_offset
2749
0
      + plt_offset);
2750
0
    unresolved_reloc = false;
2751
0
    break;
2752
2753
0
  case R_386_SIZE32:
2754
    /* Set to symbol size.  */
2755
0
    relocation = st_size;
2756
    /* Fall through.  */
2757
2758
0
  case R_386_32:
2759
0
  case R_386_PC32:
2760
0
    if ((input_section->flags & SEC_ALLOC) == 0
2761
0
        || is_vxworks_tls)
2762
0
      break;
2763
2764
0
    if (GENERATE_DYNAMIC_RELOCATION_P (false, info, eh, r_type,
2765
0
               sec, false,
2766
0
               resolved_to_zero,
2767
0
               (r_type == R_386_PC32)))
2768
0
      {
2769
0
        Elf_Internal_Rela outrel;
2770
0
        bool skip, relocate;
2771
0
        bool generate_dynamic_reloc = true;
2772
0
        asection *sreloc;
2773
2774
        /* When generating a shared object, these relocations
2775
     are copied into the output file to be resolved at run
2776
     time.  */
2777
2778
0
        skip = false;
2779
0
        relocate = false;
2780
2781
0
        outrel.r_offset =
2782
0
    _bfd_elf_section_offset (output_bfd, info, input_section,
2783
0
           rel->r_offset);
2784
0
        if (outrel.r_offset == (bfd_vma) -1)
2785
0
    skip = true;
2786
0
        else if (outrel.r_offset == (bfd_vma) -2)
2787
0
    skip = true, relocate = true;
2788
0
        outrel.r_offset += (input_section->output_section->vma
2789
0
          + input_section->output_offset);
2790
2791
0
        if (skip)
2792
0
    memset (&outrel, 0, sizeof outrel);
2793
0
        else if (COPY_INPUT_RELOC_P (false, info, h, r_type))
2794
0
    outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2795
0
        else
2796
0
    {
2797
      /* This symbol is local, or marked to become local.  */
2798
0
      relocate = true;
2799
      /* NB: Don't generate relative relocation here if it
2800
         has been generated by DT_RELR.  */
2801
0
      if (info->enable_dt_relr)
2802
0
        generate_dynamic_reloc = false;
2803
0
      else
2804
0
        {
2805
0
          outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2806
2807
0
          if (htab->params->report_relative_reloc)
2808
0
      _bfd_x86_elf_link_report_relative_reloc
2809
0
        (info, input_section, h, sym, "R_386_RELATIVE",
2810
0
         &outrel);
2811
0
        }
2812
0
    }
2813
2814
0
        if (generate_dynamic_reloc)
2815
0
    {
2816
0
      sreloc = elf_section_data (input_section)->sreloc;
2817
2818
0
      if (sreloc == NULL || sreloc->contents == NULL)
2819
0
        {
2820
0
          r = bfd_reloc_notsupported;
2821
0
          goto check_relocation_error;
2822
0
        }
2823
2824
0
      elf_append_rel (output_bfd, sreloc, &outrel);
2825
0
    }
2826
2827
        /* If this reloc is against an external symbol, we do
2828
     not want to fiddle with the addend.  Otherwise, we
2829
     need to include the symbol value so that it becomes
2830
     an addend for the dynamic reloc.  */
2831
0
        if (! relocate)
2832
0
    continue;
2833
0
      }
2834
0
    break;
2835
2836
0
  case R_386_TLS_IE:
2837
0
    if (!bfd_link_executable (info))
2838
0
      {
2839
0
        Elf_Internal_Rela outrel;
2840
0
        asection *sreloc;
2841
2842
0
        outrel.r_offset = rel->r_offset
2843
0
        + input_section->output_section->vma
2844
0
        + input_section->output_offset;
2845
0
        outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2846
2847
0
        if (htab->params->report_relative_reloc)
2848
0
    _bfd_x86_elf_link_report_relative_reloc
2849
0
      (info, input_section, h, sym, "R_386_RELATIVE",
2850
0
       &outrel);
2851
2852
0
        sreloc = elf_section_data (input_section)->sreloc;
2853
0
        if (sreloc == NULL)
2854
0
    abort ();
2855
0
        elf_append_rel (output_bfd, sreloc, &outrel);
2856
0
      }
2857
    /* Fall through */
2858
2859
0
  case R_386_TLS_GD:
2860
0
  case R_386_TLS_GOTDESC:
2861
0
  case R_386_TLS_DESC_CALL:
2862
0
  case R_386_TLS_IE_32:
2863
0
  case R_386_TLS_GOTIE:
2864
0
    tls_type = GOT_UNKNOWN;
2865
0
    if (h == NULL && local_got_offsets)
2866
0
      tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
2867
0
    else if (h != NULL)
2868
0
      tls_type = elf_x86_hash_entry(h)->tls_type;
2869
0
    if (tls_type == GOT_TLS_IE)
2870
0
      tls_type = GOT_TLS_IE_NEG;
2871
2872
0
     r_type_tls = r_type;
2873
0
    if (! elf_i386_tls_transition (info, input_bfd,
2874
0
           input_section, contents,
2875
0
           symtab_hdr, sym_hashes,
2876
0
           &r_type_tls, tls_type, rel,
2877
0
           relend, h, r_symndx, true))
2878
0
      return false;
2879
2880
0
    expected_tls_le = htab->elf.target_os == is_solaris
2881
0
      ? R_386_TLS_LE : R_386_TLS_LE_32;
2882
0
    if (r_type_tls == expected_tls_le)
2883
0
      {
2884
        /* NB: Solaris only supports R_386_TLS_GD->R_386_TLS_LE.  */
2885
0
        BFD_ASSERT (! unresolved_reloc
2886
0
        && (htab->elf.target_os != is_solaris
2887
0
            || (htab->elf.target_os == is_solaris
2888
0
          && (r_type == R_386_TLS_GD
2889
0
              || r_type == R_386_TLS_IE
2890
0
              || r_type == R_386_TLS_GOTIE))));
2891
0
        if (r_type == R_386_TLS_GD)
2892
0
    {
2893
0
      unsigned int type;
2894
0
      bfd_vma roff;
2895
2896
      /* GD->LE transition.  */
2897
0
      type = *(contents + rel->r_offset - 2);
2898
0
      if (type == 0x04)
2899
0
        {
2900
          /* Change
2901
        leal foo@tlsgd(,%ebx,1), %eax
2902
        call ___tls_get_addr@PLT
2903
       into:
2904
        movl %gs:0, %eax
2905
        subl $foo@tpoff, %eax
2906
       (6 byte form of subl).  */
2907
0
          roff = rel->r_offset + 5;
2908
0
        }
2909
0
      else
2910
0
        {
2911
          /* Change
2912
        leal foo@tlsgd(%ebx), %eax
2913
        call ___tls_get_addr@PLT
2914
        nop
2915
       or
2916
        leal foo@tlsgd(%reg), %eax
2917
        call *___tls_get_addr@GOT(%reg)
2918
        which may be converted to
2919
        addr32 call ___tls_get_addr
2920
       into:
2921
        movl %gs:0, %eax; subl $foo@tpoff, %eax
2922
       (6 byte form of subl).  */
2923
0
          roff = rel->r_offset + 6;
2924
0
        }
2925
0
      memcpy (contents + roff - 8,
2926
0
        "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2927
0
      bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
2928
0
            contents + roff);
2929
      /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X.  */
2930
0
      rel++;
2931
0
      wrel++;
2932
0
      continue;
2933
0
    }
2934
0
        else if (r_type == R_386_TLS_GOTDESC)
2935
0
    {
2936
      /* GDesc -> LE transition.
2937
         It's originally something like:
2938
         leal x@tlsdesc(%ebx), %eax
2939
2940
         leal x@ntpoff, %eax
2941
2942
         Registers other than %eax may be set up here.  */
2943
2944
0
      unsigned int val;
2945
0
      bfd_vma roff;
2946
2947
0
      roff = rel->r_offset;
2948
0
      val = bfd_get_8 (input_bfd, contents + roff - 1);
2949
2950
      /* Now modify the instruction as appropriate.  */
2951
      /* aoliva FIXME: remove the above and xor the byte
2952
         below with 0x86.  */
2953
0
      bfd_put_8 (output_bfd, val ^ 0x86,
2954
0
           contents + roff - 1);
2955
0
      bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2956
0
            contents + roff);
2957
0
      continue;
2958
0
    }
2959
0
        else if (r_type == R_386_TLS_DESC_CALL)
2960
0
    {
2961
      /* GDesc -> LE transition.
2962
         It's originally:
2963
         call *(%eax)
2964
         Turn it into:
2965
         xchg %ax,%ax  */
2966
2967
0
      bfd_vma roff;
2968
2969
0
      roff = rel->r_offset;
2970
0
      bfd_put_8 (output_bfd, 0x66, contents + roff);
2971
0
      bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2972
0
      continue;
2973
0
    }
2974
0
        else if (r_type == R_386_TLS_IE)
2975
0
    {
2976
0
      unsigned int val;
2977
2978
      /* IE->LE transition:
2979
         Originally it can be one of:
2980
         movl foo, %eax
2981
         movl foo, %reg
2982
         addl foo, %reg
2983
         We change it into:
2984
         movl $foo, %eax
2985
         movl $foo, %reg
2986
         addl $foo, %reg.  */
2987
0
      val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2988
0
      if (val == 0xa1)
2989
0
        {
2990
          /* movl foo, %eax.  */
2991
0
          bfd_put_8 (output_bfd, 0xb8,
2992
0
         contents + rel->r_offset - 1);
2993
0
        }
2994
0
      else
2995
0
        {
2996
0
          unsigned int type;
2997
2998
0
          type = bfd_get_8 (input_bfd,
2999
0
          contents + rel->r_offset - 2);
3000
0
          switch (type)
3001
0
      {
3002
0
      case 0x8b:
3003
        /* movl */
3004
0
        bfd_put_8 (output_bfd, 0xc7,
3005
0
             contents + rel->r_offset - 2);
3006
0
        bfd_put_8 (output_bfd,
3007
0
             0xc0 | ((val >> 3) & 7),
3008
0
             contents + rel->r_offset - 1);
3009
0
        break;
3010
0
      case 0x03:
3011
        /* addl */
3012
0
        bfd_put_8 (output_bfd, 0x81,
3013
0
             contents + rel->r_offset - 2);
3014
0
        bfd_put_8 (output_bfd,
3015
0
             0xc0 | ((val >> 3) & 7),
3016
0
             contents + rel->r_offset - 1);
3017
0
        break;
3018
0
      default:
3019
0
        BFD_FAIL ();
3020
0
        break;
3021
0
      }
3022
0
        }
3023
0
      bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3024
0
            contents + rel->r_offset);
3025
0
      continue;
3026
0
    }
3027
0
        else
3028
0
    {
3029
0
      unsigned int val, type;
3030
3031
      /* {IE_32,GOTIE}->LE transition:
3032
         Originally it can be one of:
3033
         subl foo(%reg1), %reg2
3034
         movl foo(%reg1), %reg2
3035
         addl foo(%reg1), %reg2
3036
         We change it into:
3037
         subl $foo, %reg2
3038
         movl $foo, %reg2 (6 byte form)
3039
         addl $foo, %reg2.  */
3040
0
      type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3041
0
      val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3042
0
      if (type == 0x8b)
3043
0
        {
3044
          /* movl */
3045
0
          bfd_put_8 (output_bfd, 0xc7,
3046
0
         contents + rel->r_offset - 2);
3047
0
          bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3048
0
         contents + rel->r_offset - 1);
3049
0
        }
3050
0
      else if (type == 0x2b)
3051
0
        {
3052
          /* subl */
3053
0
          bfd_put_8 (output_bfd, 0x81,
3054
0
         contents + rel->r_offset - 2);
3055
0
          bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3056
0
         contents + rel->r_offset - 1);
3057
0
        }
3058
0
      else if (type == 0x03)
3059
0
        {
3060
          /* addl */
3061
0
          bfd_put_8 (output_bfd, 0x81,
3062
0
         contents + rel->r_offset - 2);
3063
0
          bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3064
0
         contents + rel->r_offset - 1);
3065
0
        }
3066
0
      else
3067
0
        BFD_FAIL ();
3068
0
      if (r_type == R_386_TLS_GOTIE)
3069
0
        bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3070
0
        contents + rel->r_offset);
3071
0
      else
3072
0
        bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3073
0
        contents + rel->r_offset);
3074
0
      continue;
3075
0
    }
3076
0
      }
3077
3078
0
    if (htab->elf.sgot == NULL)
3079
0
      abort ();
3080
3081
0
    if (h != NULL)
3082
0
      {
3083
0
        off = h->got.offset;
3084
0
        offplt = elf_x86_hash_entry (h)->tlsdesc_got;
3085
0
      }
3086
0
    else
3087
0
      {
3088
0
        if (local_got_offsets == NULL)
3089
0
    abort ();
3090
3091
0
        off = local_got_offsets[r_symndx];
3092
0
        offplt = local_tlsdesc_gotents[r_symndx];
3093
0
      }
3094
3095
0
    if ((off & 1) != 0)
3096
0
      off &= ~1;
3097
0
    else
3098
0
      {
3099
0
        Elf_Internal_Rela outrel;
3100
0
        int dr_type;
3101
0
        asection *sreloc;
3102
3103
0
        if (htab->elf.srelgot == NULL)
3104
0
    abort ();
3105
3106
0
        indx = h && h->dynindx != -1 ? h->dynindx : 0;
3107
3108
0
        if (GOT_TLS_GDESC_P (tls_type))
3109
0
    {
3110
0
      bfd_byte *loc;
3111
0
      outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3112
0
      BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3113
0
            <= htab->elf.sgotplt->size);
3114
0
      outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3115
0
             + htab->elf.sgotplt->output_offset
3116
0
             + offplt
3117
0
             + htab->sgotplt_jump_table_size);
3118
0
      sreloc = htab->elf.srelplt;
3119
0
      loc = sreloc->contents;
3120
0
      loc += (htab->next_tls_desc_index++
3121
0
        * sizeof (Elf32_External_Rel));
3122
0
      BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3123
0
            <= sreloc->contents + sreloc->size);
3124
0
      bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3125
0
      if (indx == 0)
3126
0
        {
3127
0
          BFD_ASSERT (! unresolved_reloc);
3128
0
          bfd_put_32 (output_bfd,
3129
0
          relocation - _bfd_x86_elf_dtpoff_base (info),
3130
0
          htab->elf.sgotplt->contents + offplt
3131
0
          + htab->sgotplt_jump_table_size + 4);
3132
0
        }
3133
0
      else
3134
0
        {
3135
0
          bfd_put_32 (output_bfd, 0,
3136
0
          htab->elf.sgotplt->contents + offplt
3137
0
          + htab->sgotplt_jump_table_size + 4);
3138
0
        }
3139
0
    }
3140
3141
0
        sreloc = htab->elf.srelgot;
3142
3143
0
        outrel.r_offset = (htab->elf.sgot->output_section->vma
3144
0
         + htab->elf.sgot->output_offset + off);
3145
3146
0
        if (GOT_TLS_GD_P (tls_type))
3147
0
    dr_type = R_386_TLS_DTPMOD32;
3148
0
        else if (GOT_TLS_GDESC_P (tls_type))
3149
0
    goto dr_done;
3150
0
        else if (tls_type == GOT_TLS_IE_POS)
3151
0
    dr_type = R_386_TLS_TPOFF;
3152
0
        else
3153
0
    dr_type = R_386_TLS_TPOFF32;
3154
3155
0
        if (dr_type == R_386_TLS_TPOFF && indx == 0)
3156
0
    bfd_put_32 (output_bfd,
3157
0
          relocation - _bfd_x86_elf_dtpoff_base (info),
3158
0
          htab->elf.sgot->contents + off);
3159
0
        else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3160
0
    bfd_put_32 (output_bfd,
3161
0
          _bfd_x86_elf_dtpoff_base (info) - relocation,
3162
0
          htab->elf.sgot->contents + off);
3163
0
        else if (dr_type != R_386_TLS_DESC)
3164
0
    bfd_put_32 (output_bfd, 0,
3165
0
          htab->elf.sgot->contents + off);
3166
0
        outrel.r_info = ELF32_R_INFO (indx, dr_type);
3167
3168
0
        elf_append_rel (output_bfd, sreloc, &outrel);
3169
3170
0
        if (GOT_TLS_GD_P (tls_type))
3171
0
    {
3172
0
      if (indx == 0)
3173
0
        {
3174
0
          BFD_ASSERT (! unresolved_reloc);
3175
0
          bfd_put_32 (output_bfd,
3176
0
          relocation - _bfd_x86_elf_dtpoff_base (info),
3177
0
          htab->elf.sgot->contents + off + 4);
3178
0
        }
3179
0
      else
3180
0
        {
3181
0
          bfd_put_32 (output_bfd, 0,
3182
0
          htab->elf.sgot->contents + off + 4);
3183
0
          outrel.r_info = ELF32_R_INFO (indx,
3184
0
                R_386_TLS_DTPOFF32);
3185
0
          outrel.r_offset += 4;
3186
0
          elf_append_rel (output_bfd, sreloc, &outrel);
3187
0
        }
3188
0
    }
3189
0
        else if (tls_type == GOT_TLS_IE_BOTH)
3190
0
    {
3191
0
      bfd_put_32 (output_bfd,
3192
0
            (indx == 0
3193
0
             ? relocation - _bfd_x86_elf_dtpoff_base (info)
3194
0
             : 0),
3195
0
            htab->elf.sgot->contents + off + 4);
3196
0
      outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3197
0
      outrel.r_offset += 4;
3198
0
      elf_append_rel (output_bfd, sreloc, &outrel);
3199
0
    }
3200
3201
0
      dr_done:
3202
0
        if (h != NULL)
3203
0
    h->got.offset |= 1;
3204
0
        else
3205
0
    local_got_offsets[r_symndx] |= 1;
3206
0
      }
3207
3208
0
    if (off >= (bfd_vma) -2
3209
0
        && ! GOT_TLS_GDESC_P (tls_type))
3210
0
      abort ();
3211
0
    if (r_type_tls == R_386_TLS_GOTDESC
3212
0
        || r_type_tls == R_386_TLS_DESC_CALL)
3213
0
      {
3214
0
        relocation = htab->sgotplt_jump_table_size + offplt;
3215
0
        unresolved_reloc = false;
3216
0
      }
3217
0
    else if (r_type_tls == r_type)
3218
0
      {
3219
0
        bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3220
0
            + htab->elf.sgotplt->output_offset;
3221
0
        relocation = htab->elf.sgot->output_section->vma
3222
0
    + htab->elf.sgot->output_offset + off - g_o_t;
3223
0
        if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3224
0
      && tls_type == GOT_TLS_IE_BOTH)
3225
0
    relocation += 4;
3226
0
        if (r_type == R_386_TLS_IE)
3227
0
    relocation += g_o_t;
3228
0
        unresolved_reloc = false;
3229
0
      }
3230
0
    else if (r_type == R_386_TLS_GD)
3231
0
      {
3232
0
        unsigned int val, type;
3233
0
        bfd_vma roff;
3234
3235
        /* GD->IE transition.  */
3236
0
        type = *(contents + rel->r_offset - 2);
3237
0
        val = *(contents + rel->r_offset - 1);
3238
0
        if (type == 0x04)
3239
0
    {
3240
      /* Change
3241
      leal foo@tlsgd(,%ebx,1), %eax
3242
      call ___tls_get_addr@PLT
3243
         into:
3244
      movl %gs:0, %eax
3245
      subl $foo@gottpoff(%ebx), %eax.  */
3246
0
      val >>= 3;
3247
0
      roff = rel->r_offset - 3;
3248
0
    }
3249
0
        else
3250
0
    {
3251
      /* Change
3252
      leal foo@tlsgd(%ebx), %eax
3253
      call ___tls_get_addr@PLT
3254
      nop
3255
         or
3256
      leal foo@tlsgd(%reg), %eax
3257
      call *___tls_get_addr@GOT(%reg)
3258
      which may be converted to
3259
      addr32 call ___tls_get_addr
3260
         into:
3261
      movl %gs:0, %eax;
3262
      subl $foo@gottpoff(%reg), %eax.  */
3263
0
      roff = rel->r_offset - 2;
3264
0
    }
3265
0
        memcpy (contents + roff,
3266
0
          "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3267
0
        contents[roff + 7] = 0x80 | (val & 7);
3268
        /* If foo is used only with foo@gotntpoff(%reg) and
3269
     foo@indntpoff, but not with foo@gottpoff(%reg), change
3270
     subl $foo@gottpoff(%reg), %eax
3271
     into:
3272
     addl $foo@gotntpoff(%reg), %eax.  */
3273
0
        if (tls_type == GOT_TLS_IE_POS)
3274
0
    contents[roff + 6] = 0x03;
3275
0
        bfd_put_32 (output_bfd,
3276
0
        htab->elf.sgot->output_section->vma
3277
0
        + htab->elf.sgot->output_offset + off
3278
0
        - htab->elf.sgotplt->output_section->vma
3279
0
        - htab->elf.sgotplt->output_offset,
3280
0
        contents + roff + 8);
3281
        /* Skip R_386_PLT32 and R_386_GOT32X.  */
3282
0
        rel++;
3283
0
        wrel++;
3284
0
        continue;
3285
0
      }
3286
0
    else if (r_type == R_386_TLS_GOTDESC)
3287
0
      {
3288
        /* GDesc -> IE transition.
3289
     It's originally something like:
3290
     leal x@tlsdesc(%ebx), %eax
3291
3292
     Change it to:
3293
     movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3294
     or:
3295
     movl x@gottpoff(%ebx), %eax # before negl %eax
3296
3297
     Registers other than %eax may be set up here.  */
3298
3299
0
        bfd_vma roff;
3300
3301
        /* First, make sure it's a leal adding ebx to a 32-bit
3302
     offset into any register, although it's probably
3303
     almost always going to be eax.  */
3304
0
        roff = rel->r_offset;
3305
3306
        /* Now modify the instruction as appropriate.  */
3307
        /* To turn a leal into a movl in the form we use it, it
3308
     suffices to change the first byte from 0x8d to 0x8b.
3309
     aoliva FIXME: should we decide to keep the leal, all
3310
     we have to do is remove the statement below, and
3311
     adjust the relaxation of R_386_TLS_DESC_CALL.  */
3312
0
        bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3313
3314
0
        if (tls_type == GOT_TLS_IE_BOTH)
3315
0
    off += 4;
3316
3317
0
        bfd_put_32 (output_bfd,
3318
0
        htab->elf.sgot->output_section->vma
3319
0
        + htab->elf.sgot->output_offset + off
3320
0
        - htab->elf.sgotplt->output_section->vma
3321
0
        - htab->elf.sgotplt->output_offset,
3322
0
        contents + roff);
3323
0
        continue;
3324
0
      }
3325
0
    else if (r_type == R_386_TLS_DESC_CALL)
3326
0
      {
3327
        /* GDesc -> IE transition.
3328
     It's originally:
3329
     call *(%eax)
3330
3331
     Change it to:
3332
     xchg %ax,%ax
3333
     or
3334
     negl %eax
3335
     depending on how we transformed the TLS_GOTDESC above.
3336
        */
3337
3338
0
        bfd_vma roff;
3339
3340
0
        roff = rel->r_offset;
3341
3342
        /* Now modify the instruction as appropriate.  */
3343
0
        if (tls_type != GOT_TLS_IE_NEG)
3344
0
    {
3345
      /* xchg %ax,%ax */
3346
0
      bfd_put_8 (output_bfd, 0x66, contents + roff);
3347
0
      bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3348
0
    }
3349
0
        else
3350
0
    {
3351
      /* negl %eax */
3352
0
      bfd_put_8 (output_bfd, 0xf7, contents + roff);
3353
0
      bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3354
0
    }
3355
3356
0
        continue;
3357
0
      }
3358
0
    else
3359
0
      BFD_ASSERT (false);
3360
0
    break;
3361
3362
0
  case R_386_TLS_LDM:
3363
0
    if (! elf_i386_tls_transition (info, input_bfd,
3364
0
           input_section, contents,
3365
0
           symtab_hdr, sym_hashes,
3366
0
           &r_type, GOT_UNKNOWN, rel,
3367
0
           relend, h, r_symndx, true))
3368
0
      return false;
3369
3370
0
    if (r_type != R_386_TLS_LDM)
3371
0
      {
3372
        /* LD->LE transition.  Change
3373
      leal foo@tlsldm(%ebx) %eax
3374
      call ___tls_get_addr@PLT
3375
     into:
3376
      movl %gs:0, %eax
3377
      nop
3378
      leal 0(%esi,1), %esi
3379
     or change
3380
      leal foo@tlsldm(%reg) %eax
3381
      call *___tls_get_addr@GOT(%reg)
3382
      which may be converted to
3383
      addr32 call ___tls_get_addr
3384
     into:
3385
      movl %gs:0, %eax
3386
      leal 0(%esi), %esi  */
3387
0
        expected_tls_le = htab->elf.target_os == is_solaris
3388
0
    ? R_386_TLS_LE : R_386_TLS_LE_32;
3389
0
        BFD_ASSERT (r_type == expected_tls_le);
3390
0
        if (*(contents + rel->r_offset + 4) == 0xff
3391
0
      || *(contents + rel->r_offset + 4) == 0x67)
3392
0
    memcpy (contents + rel->r_offset - 2,
3393
0
      "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3394
0
        else
3395
0
    memcpy (contents + rel->r_offset - 2,
3396
0
      "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3397
        /* Skip R_386_PC32/R_386_PLT32.  */
3398
0
        rel++;
3399
0
        wrel++;
3400
0
        continue;
3401
0
      }
3402
3403
0
    if (htab->elf.sgot == NULL)
3404
0
      abort ();
3405
3406
0
    off = htab->tls_ld_or_ldm_got.offset;
3407
0
    if (off & 1)
3408
0
      off &= ~1;
3409
0
    else
3410
0
      {
3411
0
        Elf_Internal_Rela outrel;
3412
3413
0
        if (htab->elf.srelgot == NULL)
3414
0
    abort ();
3415
3416
0
        outrel.r_offset = (htab->elf.sgot->output_section->vma
3417
0
         + htab->elf.sgot->output_offset + off);
3418
3419
0
        bfd_put_32 (output_bfd, 0,
3420
0
        htab->elf.sgot->contents + off);
3421
0
        bfd_put_32 (output_bfd, 0,
3422
0
        htab->elf.sgot->contents + off + 4);
3423
0
        outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3424
0
        elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
3425
0
        htab->tls_ld_or_ldm_got.offset |= 1;
3426
0
      }
3427
0
    relocation = htab->elf.sgot->output_section->vma
3428
0
           + htab->elf.sgot->output_offset + off
3429
0
           - htab->elf.sgotplt->output_section->vma
3430
0
           - htab->elf.sgotplt->output_offset;
3431
0
    unresolved_reloc = false;
3432
0
    break;
3433
3434
0
  case R_386_TLS_LDO_32:
3435
0
    if (!bfd_link_executable (info)
3436
0
        || (input_section->flags & SEC_CODE) == 0)
3437
0
      relocation -= _bfd_x86_elf_dtpoff_base (info);
3438
0
    else
3439
      /* When converting LDO to LE, we must negate.  */
3440
0
      relocation = -elf_i386_tpoff (info, relocation);
3441
0
    break;
3442
3443
0
  case R_386_TLS_LE_32:
3444
0
  case R_386_TLS_LE:
3445
0
    if (!bfd_link_executable (info))
3446
0
      {
3447
0
        Elf_Internal_Rela outrel;
3448
0
        asection *sreloc;
3449
3450
0
        outrel.r_offset = rel->r_offset
3451
0
        + input_section->output_section->vma
3452
0
        + input_section->output_offset;
3453
0
        if (h != NULL && h->dynindx != -1)
3454
0
    indx = h->dynindx;
3455
0
        else
3456
0
    indx = 0;
3457
0
        if (r_type == R_386_TLS_LE_32)
3458
0
    outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3459
0
        else
3460
0
    outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3461
0
        sreloc = elf_section_data (input_section)->sreloc;
3462
0
        if (sreloc == NULL)
3463
0
    abort ();
3464
0
        elf_append_rel (output_bfd, sreloc, &outrel);
3465
0
        if (indx)
3466
0
    continue;
3467
0
        else if (r_type == R_386_TLS_LE_32)
3468
0
    relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
3469
0
        else
3470
0
    relocation -= _bfd_x86_elf_dtpoff_base (info);
3471
0
      }
3472
0
    else if (r_type == R_386_TLS_LE_32)
3473
0
      relocation = elf_i386_tpoff (info, relocation);
3474
0
    else
3475
0
      relocation = -elf_i386_tpoff (info, relocation);
3476
0
    break;
3477
3478
0
  default:
3479
0
    break;
3480
0
  }
3481
3482
      /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3483
   because such sections are not SEC_ALLOC and thus ld.so will
3484
   not process them.  */
3485
0
      if (unresolved_reloc
3486
0
    && !((input_section->flags & SEC_DEBUGGING) != 0
3487
0
         && h->def_dynamic)
3488
0
    && _bfd_elf_section_offset (output_bfd, info, input_section,
3489
0
              rel->r_offset) != (bfd_vma) -1)
3490
0
  {
3491
0
    _bfd_error_handler
3492
      /* xgettext:c-format */
3493
0
      (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
3494
0
       input_bfd,
3495
0
       input_section,
3496
0
       (uint64_t) rel->r_offset,
3497
0
       howto->name,
3498
0
       h->root.root.string);
3499
0
    return false;
3500
0
  }
3501
3502
0
    do_relocation:
3503
0
      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3504
0
            contents, rel->r_offset,
3505
0
            relocation, 0);
3506
3507
0
    check_relocation_error:
3508
0
      if (r != bfd_reloc_ok)
3509
0
  {
3510
0
    const char *name;
3511
3512
0
    if (h != NULL)
3513
0
      name = h->root.root.string;
3514
0
    else
3515
0
      {
3516
0
        name = bfd_elf_string_from_elf_section (input_bfd,
3517
0
                  symtab_hdr->sh_link,
3518
0
                  sym->st_name);
3519
0
        if (name == NULL)
3520
0
    return false;
3521
0
        if (*name == '\0')
3522
0
    name = bfd_section_name (sec);
3523
0
      }
3524
3525
0
    if (r == bfd_reloc_overflow)
3526
0
      (*info->callbacks->reloc_overflow)
3527
0
        (info, (h ? &h->root : NULL), name, howto->name,
3528
0
         (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3529
0
    else
3530
0
      {
3531
0
        _bfd_error_handler
3532
    /* xgettext:c-format */
3533
0
    (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3534
0
     input_bfd, input_section,
3535
0
     (uint64_t) rel->r_offset, name, (int) r);
3536
0
        return false;
3537
0
      }
3538
0
  }
3539
3540
0
      if (wrel != rel)
3541
0
  *wrel = *rel;
3542
0
    }
3543
3544
0
  if (wrel != rel)
3545
0
    {
3546
0
      Elf_Internal_Shdr *rel_hdr;
3547
0
      size_t deleted = rel - wrel;
3548
3549
0
      rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3550
0
      rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3551
0
      if (rel_hdr->sh_size == 0)
3552
0
  {
3553
    /* It is too late to remove an empty reloc section.  Leave
3554
       one NONE reloc.
3555
       ??? What is wrong with an empty section???  */
3556
0
    rel_hdr->sh_size = rel_hdr->sh_entsize;
3557
0
    deleted -= 1;
3558
0
  }
3559
0
      rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3560
0
      rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3561
0
      input_section->reloc_count -= deleted;
3562
0
    }
3563
3564
0
  return true;
3565
0
}
3566
3567
/* Finish up dynamic symbol handling.  We set the contents of various
3568
   dynamic sections here.  */
3569
3570
static bool
3571
elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3572
        struct bfd_link_info *info,
3573
        struct elf_link_hash_entry *h,
3574
        Elf_Internal_Sym *sym)
3575
0
{
3576
0
  struct elf_x86_link_hash_table *htab;
3577
0
  unsigned plt_entry_size;
3578
0
  struct elf_x86_link_hash_entry *eh;
3579
0
  bool local_undefweak;
3580
0
  bool use_plt_second;
3581
3582
0
  htab = elf_x86_hash_table (info, I386_ELF_DATA);
3583
3584
0
  plt_entry_size = htab->plt.plt_entry_size;
3585
3586
  /* Use the second PLT section only if there is .plt section.  */
3587
0
  use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3588
3589
0
  eh = (struct elf_x86_link_hash_entry *) h;
3590
0
  if (eh->no_finish_dynamic_symbol)
3591
0
    abort ();
3592
3593
  /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3594
     resolved undefined weak symbols in executable so that their
3595
     references have value 0 at run-time.  */
3596
0
  local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
3597
3598
0
  if (h->plt.offset != (bfd_vma) -1)
3599
0
    {
3600
0
      bfd_vma plt_index, plt_offset;
3601
0
      bfd_vma got_offset;
3602
0
      Elf_Internal_Rela rel;
3603
0
      bfd_byte *loc;
3604
0
      asection *plt, *resolved_plt, *gotplt, *relplt;
3605
3606
      /* When building a static executable, use .iplt, .igot.plt and
3607
   .rel.iplt sections for STT_GNU_IFUNC symbols.  */
3608
0
      if (htab->elf.splt != NULL)
3609
0
  {
3610
0
    plt = htab->elf.splt;
3611
0
    gotplt = htab->elf.sgotplt;
3612
0
    relplt = htab->elf.srelplt;
3613
0
  }
3614
0
      else
3615
0
  {
3616
0
    plt = htab->elf.iplt;
3617
0
    gotplt = htab->elf.igotplt;
3618
0
    relplt = htab->elf.irelplt;
3619
0
  }
3620
3621
0
      VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
3622
3623
      /* Get the index in the procedure linkage table which
3624
   corresponds to this symbol.  This is the index of this symbol
3625
   in all the symbols for which we are making plt entries.  The
3626
   first entry in the procedure linkage table is reserved.
3627
3628
   Get the offset into the .got table of the entry that
3629
   corresponds to this function.  Each .got entry is 4 bytes.
3630
   The first three are reserved.
3631
3632
   For static executables, we don't reserve anything.  */
3633
3634
0
      if (plt == htab->elf.splt)
3635
0
  {
3636
0
    got_offset = (h->plt.offset / plt_entry_size
3637
0
      - htab->plt.has_plt0);
3638
0
    got_offset = (got_offset + 3) * 4;
3639
0
  }
3640
0
      else
3641
0
  {
3642
0
    got_offset = h->plt.offset / plt_entry_size;
3643
0
    got_offset = got_offset * 4;
3644
0
  }
3645
3646
      /* Fill in the entry in the procedure linkage table and update
3647
   the first slot.  */
3648
0
      memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
3649
0
        plt_entry_size);
3650
3651
0
      if (use_plt_second)
3652
0
  {
3653
0
    const bfd_byte *plt_entry;
3654
0
    if (bfd_link_pic (info))
3655
0
      plt_entry = htab->non_lazy_plt->pic_plt_entry;
3656
0
    else
3657
0
      plt_entry = htab->non_lazy_plt->plt_entry;
3658
0
    memcpy (htab->plt_second->contents + eh->plt_second.offset,
3659
0
      plt_entry, htab->non_lazy_plt->plt_entry_size);
3660
3661
0
    resolved_plt = htab->plt_second;
3662
0
    plt_offset = eh->plt_second.offset;
3663
0
  }
3664
0
      else
3665
0
  {
3666
0
    resolved_plt = plt;
3667
0
    plt_offset = h->plt.offset;
3668
0
  }
3669
3670
0
      if (! bfd_link_pic (info))
3671
0
  {
3672
0
    bfd_put_32 (output_bfd,
3673
0
          (gotplt->output_section->vma
3674
0
           + gotplt->output_offset
3675
0
           + got_offset),
3676
0
          resolved_plt->contents + plt_offset
3677
0
          + htab->plt.plt_got_offset);
3678
3679
0
    if (htab->elf.target_os == is_vxworks)
3680
0
      {
3681
0
        int s, k, reloc_index;
3682
3683
        /* Create the R_386_32 relocation referencing the GOT
3684
     for this PLT entry.  */
3685
3686
        /* S: Current slot number (zero-based).  */
3687
0
        s = ((h->plt.offset - htab->plt.plt_entry_size)
3688
0
       / htab->plt.plt_entry_size);
3689
        /* K: Number of relocations for PLTResolve. */
3690
0
        if (bfd_link_pic (info))
3691
0
    k = PLTRESOLVE_RELOCS_SHLIB;
3692
0
        else
3693
0
    k = PLTRESOLVE_RELOCS;
3694
        /* Skip the PLTresolve relocations, and the relocations for
3695
     the other PLT slots. */
3696
0
        reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3697
0
        loc = (htab->srelplt2->contents + reloc_index
3698
0
         * sizeof (Elf32_External_Rel));
3699
3700
0
        rel.r_offset = (plt->output_section->vma
3701
0
            + plt->output_offset
3702
0
            + h->plt.offset + 2),
3703
0
        rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3704
0
        bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3705
3706
        /* Create the R_386_32 relocation referencing the beginning of
3707
     the PLT for this GOT entry.  */
3708
0
        rel.r_offset = (htab->elf.sgotplt->output_section->vma
3709
0
            + htab->elf.sgotplt->output_offset
3710
0
            + got_offset);
3711
0
        rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3712
0
        bfd_elf32_swap_reloc_out (output_bfd, &rel,
3713
0
          loc + sizeof (Elf32_External_Rel));
3714
0
      }
3715
0
  }
3716
0
      else
3717
0
  {
3718
0
    bfd_put_32 (output_bfd, got_offset,
3719
0
          resolved_plt->contents + plt_offset
3720
0
          + htab->plt.plt_got_offset);
3721
0
  }
3722
3723
      /* Fill in the entry in the global offset table.  Leave the entry
3724
   as zero for undefined weak symbol in PIE.  No PLT relocation
3725
   against undefined weak symbol in PIE.  */
3726
0
      if (!local_undefweak)
3727
0
  {
3728
0
    if (htab->plt.has_plt0)
3729
0
      bfd_put_32 (output_bfd,
3730
0
      (plt->output_section->vma
3731
0
       + plt->output_offset
3732
0
       + h->plt.offset
3733
0
       + htab->lazy_plt->plt_lazy_offset),
3734
0
      gotplt->contents + got_offset);
3735
3736
    /* Fill in the entry in the .rel.plt section.  */
3737
0
    rel.r_offset = (gotplt->output_section->vma
3738
0
        + gotplt->output_offset
3739
0
        + got_offset);
3740
0
    if (PLT_LOCAL_IFUNC_P (info, h))
3741
0
      {
3742
0
        info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3743
0
              h->root.root.string,
3744
0
              h->root.u.def.section->owner);
3745
3746
        /* If an STT_GNU_IFUNC symbol is locally defined, generate
3747
     R_386_IRELATIVE instead of R_386_JUMP_SLOT.  Store addend
3748
     in the .got.plt section.  */
3749
0
        bfd_put_32 (output_bfd,
3750
0
        (h->root.u.def.value
3751
0
         + h->root.u.def.section->output_section->vma
3752
0
         + h->root.u.def.section->output_offset),
3753
0
        gotplt->contents + got_offset);
3754
0
        rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3755
3756
0
        if (htab->params->report_relative_reloc)
3757
0
    _bfd_x86_elf_link_report_relative_reloc
3758
0
      (info, relplt, h, sym, "R_386_IRELATIVE", &rel);
3759
3760
        /* R_386_IRELATIVE comes last.  */
3761
0
        plt_index = htab->next_irelative_index--;
3762
0
      }
3763
0
    else
3764
0
      {
3765
0
        rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3766
0
        plt_index = htab->next_jump_slot_index++;
3767
0
      }
3768
3769
0
    loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3770
0
    bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3771
3772
    /* Don't fill the second and third slots in PLT entry for
3773
       static executables nor without PLT0.  */
3774
0
    if (plt == htab->elf.splt && htab->plt.has_plt0)
3775
0
      {
3776
0
        bfd_put_32 (output_bfd,
3777
0
        plt_index * sizeof (Elf32_External_Rel),
3778
0
        plt->contents + h->plt.offset
3779
0
        + htab->lazy_plt->plt_reloc_offset);
3780
0
        bfd_put_32 (output_bfd,
3781
0
        - (h->plt.offset
3782
0
           + htab->lazy_plt->plt_plt_offset + 4),
3783
0
        (plt->contents + h->plt.offset
3784
0
         + htab->lazy_plt->plt_plt_offset));
3785
0
      }
3786
0
  }
3787
0
    }
3788
0
  else if (eh->plt_got.offset != (bfd_vma) -1)
3789
0
    {
3790
0
      bfd_vma got_offset, plt_offset;
3791
0
      asection *plt, *got, *gotplt;
3792
0
      const bfd_byte *got_plt_entry;
3793
3794
      /* Set the entry in the GOT procedure linkage table.  */
3795
0
      plt = htab->plt_got;
3796
0
      got = htab->elf.sgot;
3797
0
      gotplt = htab->elf.sgotplt;
3798
0
      got_offset = h->got.offset;
3799
3800
0
      if (got_offset == (bfd_vma) -1
3801
0
    || plt == NULL
3802
0
    || got == NULL
3803
0
    || gotplt == NULL)
3804
0
  abort ();
3805
3806
      /* Fill in the entry in the GOT procedure linkage table.  */
3807
0
      if (! bfd_link_pic (info))
3808
0
  {
3809
0
    got_plt_entry = htab->non_lazy_plt->plt_entry;
3810
0
    got_offset += got->output_section->vma + got->output_offset;
3811
0
  }
3812
0
      else
3813
0
  {
3814
0
    got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
3815
0
    got_offset += (got->output_section->vma
3816
0
       + got->output_offset
3817
0
       - gotplt->output_section->vma
3818
0
       - gotplt->output_offset);
3819
0
  }
3820
3821
0
      plt_offset = eh->plt_got.offset;
3822
0
      memcpy (plt->contents + plt_offset, got_plt_entry,
3823
0
        htab->non_lazy_plt->plt_entry_size);
3824
0
      bfd_put_32 (output_bfd, got_offset,
3825
0
      (plt->contents + plt_offset
3826
0
       + htab->non_lazy_plt->plt_got_offset));
3827
0
    }
3828
3829
0
  if (!local_undefweak
3830
0
      && !h->def_regular
3831
0
      && (h->plt.offset != (bfd_vma) -1
3832
0
    || eh->plt_got.offset != (bfd_vma) -1))
3833
0
    {
3834
      /* Mark the symbol as undefined, rather than as defined in
3835
   the .plt section.  Leave the value if there were any
3836
   relocations where pointer equality matters (this is a clue
3837
   for the dynamic linker, to make function pointer
3838
   comparisons work between an application and shared
3839
   library), otherwise set it to zero.  If a function is only
3840
   called from a binary, there is no need to slow down
3841
   shared libraries because of that.  */
3842
0
      sym->st_shndx = SHN_UNDEF;
3843
0
      if (!h->pointer_equality_needed)
3844
0
  sym->st_value = 0;
3845
0
    }
3846
3847
0
  _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
3848
3849
  /* Don't generate dynamic GOT relocation against undefined weak
3850
     symbol in executable.  */
3851
0
  if (h->got.offset != (bfd_vma) -1
3852
0
      && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3853
0
      && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
3854
0
      && !local_undefweak)
3855
0
    {
3856
0
      Elf_Internal_Rela rel;
3857
0
      asection *relgot = htab->elf.srelgot;
3858
0
      const char *relative_reloc_name = NULL;
3859
0
      bool generate_dynamic_reloc = true;
3860
3861
      /* This symbol has an entry in the global offset table.  Set it
3862
   up.  */
3863
3864
0
      if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3865
0
  abort ();
3866
3867
0
      rel.r_offset = (htab->elf.sgot->output_section->vma
3868
0
          + htab->elf.sgot->output_offset
3869
0
          + (h->got.offset & ~(bfd_vma) 1));
3870
3871
      /* If this is a static link, or it is a -Bsymbolic link and the
3872
   symbol is defined locally or was forced to be local because
3873
   of a version file, we just want to emit a RELATIVE reloc.
3874
   The entry in the global offset table will already have been
3875
   initialized in the relocate_section function.  */
3876
0
      if (h->def_regular
3877
0
    && h->type == STT_GNU_IFUNC)
3878
0
  {
3879
0
    if (h->plt.offset == (bfd_vma) -1)
3880
0
      {
3881
        /* STT_GNU_IFUNC is referenced without PLT.  */
3882
0
        if (htab->elf.splt == NULL)
3883
0
    {
3884
      /* use .rel[a].iplt section to store .got relocations
3885
         in static executable.  */
3886
0
      relgot = htab->elf.irelplt;
3887
0
    }
3888
0
        if (SYMBOL_REFERENCES_LOCAL_P (info, h))
3889
0
    {
3890
0
      info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3891
0
            h->root.root.string,
3892
0
            h->root.u.def.section->owner);
3893
3894
0
      bfd_put_32 (output_bfd,
3895
0
            (h->root.u.def.value
3896
0
             + h->root.u.def.section->output_section->vma
3897
0
             + h->root.u.def.section->output_offset),
3898
0
            htab->elf.sgot->contents + h->got.offset);
3899
0
      rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3900
0
      relative_reloc_name = "R_386_IRELATIVE";
3901
0
    }
3902
0
        else
3903
0
    goto do_glob_dat;
3904
0
      }
3905
0
    else if (bfd_link_pic (info))
3906
0
      {
3907
        /* Generate R_386_GLOB_DAT.  */
3908
0
        goto do_glob_dat;
3909
0
      }
3910
0
    else
3911
0
      {
3912
0
        asection *plt;
3913
0
        bfd_vma plt_offset;
3914
3915
0
        if (!h->pointer_equality_needed)
3916
0
    abort ();
3917
3918
        /* For non-shared object, we can't use .got.plt, which
3919
     contains the real function addres if we need pointer
3920
     equality.  We load the GOT entry with the PLT entry.  */
3921
0
        if (htab->plt_second != NULL)
3922
0
    {
3923
0
      plt = htab->plt_second;
3924
0
      plt_offset = eh->plt_second.offset;
3925
0
    }
3926
0
        else
3927
0
    {
3928
0
      plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3929
0
      plt_offset = h->plt.offset;
3930
0
    }
3931
0
        bfd_put_32 (output_bfd,
3932
0
        (plt->output_section->vma
3933
0
         + plt->output_offset + plt_offset),
3934
0
        htab->elf.sgot->contents + h->got.offset);
3935
0
        return true;
3936
0
      }
3937
0
  }
3938
0
      else if (bfd_link_pic (info)
3939
0
         && SYMBOL_REFERENCES_LOCAL_P (info, h))
3940
0
  {
3941
0
    BFD_ASSERT((h->got.offset & 1) != 0);
3942
0
    if (info->enable_dt_relr)
3943
0
      generate_dynamic_reloc = false;
3944
0
    else
3945
0
      {
3946
0
        rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3947
0
        relative_reloc_name = "R_386_RELATIVE";
3948
0
      }
3949
0
  }
3950
0
      else
3951
0
  {
3952
0
    BFD_ASSERT((h->got.offset & 1) == 0);
3953
0
  do_glob_dat:
3954
0
    bfd_put_32 (output_bfd, (bfd_vma) 0,
3955
0
          htab->elf.sgot->contents + h->got.offset);
3956
0
    rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3957
0
  }
3958
3959
0
      if (generate_dynamic_reloc)
3960
0
  {
3961
0
    if (relative_reloc_name != NULL
3962
0
        && htab->params->report_relative_reloc)
3963
0
      _bfd_x86_elf_link_report_relative_reloc
3964
0
        (info, relgot, h, sym, relative_reloc_name, &rel);
3965
3966
0
    elf_append_rel (output_bfd, relgot, &rel);
3967
0
  }
3968
0
    }
3969
3970
0
  if (h->needs_copy)
3971
0
    {
3972
0
      Elf_Internal_Rela rel;
3973
0
      asection *s;
3974
3975
      /* This symbol needs a copy reloc.  Set it up.  */
3976
0
      VERIFY_COPY_RELOC (h, htab)
3977
3978
0
      rel.r_offset = (h->root.u.def.value
3979
0
          + h->root.u.def.section->output_section->vma
3980
0
          + h->root.u.def.section->output_offset);
3981
0
      rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3982
0
      if (h->root.u.def.section == htab->elf.sdynrelro)
3983
0
  s = htab->elf.sreldynrelro;
3984
0
      else
3985
0
  s = htab->elf.srelbss;
3986
0
      elf_append_rel (output_bfd, s, &rel);
3987
0
    }
3988
3989
0
  return true;
3990
0
}
3991
3992
/* Finish up local dynamic symbol handling.  We set the contents of
3993
   various dynamic sections here.  */
3994
3995
static int
3996
elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3997
0
{
3998
0
  struct elf_link_hash_entry *h
3999
0
    = (struct elf_link_hash_entry *) *slot;
4000
0
  struct bfd_link_info *info
4001
0
    = (struct bfd_link_info *) inf;
4002
4003
0
  return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4004
0
           h, NULL);
4005
0
}
4006
4007
/* Finish up undefined weak symbol handling in PIE.  Fill its PLT entry
4008
   here since undefined weak symbol may not be dynamic and may not be
4009
   called for elf_i386_finish_dynamic_symbol.  */
4010
4011
static bool
4012
elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
4013
              void *inf)
4014
0
{
4015
0
  struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
4016
0
  struct bfd_link_info *info = (struct bfd_link_info *) inf;
4017
4018
0
  if (h->root.type != bfd_link_hash_undefweak
4019
0
      || h->dynindx != -1)
4020
0
    return true;
4021
4022
0
  return elf_i386_finish_dynamic_symbol (info->output_bfd,
4023
0
           info, h, NULL);
4024
0
}
4025
4026
/* Used to decide how to sort relocs in an optimal manner for the
4027
   dynamic linker, before writing them out.  */
4028
4029
static enum elf_reloc_type_class
4030
elf_i386_reloc_type_class (const struct bfd_link_info *info,
4031
         const asection *rel_sec ATTRIBUTE_UNUSED,
4032
         const Elf_Internal_Rela *rela)
4033
0
{
4034
0
  bfd *abfd = info->output_bfd;
4035
0
  const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4036
0
  struct elf_link_hash_table *htab = elf_hash_table (info);
4037
4038
0
  if (htab->dynsym != NULL
4039
0
      && htab->dynsym->contents != NULL)
4040
0
    {
4041
      /* Check relocation against STT_GNU_IFUNC symbol if there are
4042
   dynamic symbols.  */
4043
0
      unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
4044
0
      if (r_symndx != STN_UNDEF)
4045
0
  {
4046
0
    Elf_Internal_Sym sym;
4047
0
    if (!bed->s->swap_symbol_in (abfd,
4048
0
               (htab->dynsym->contents
4049
0
          + r_symndx * sizeof (Elf32_External_Sym)),
4050
0
               0, &sym))
4051
0
      abort ();
4052
4053
0
    if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
4054
0
      return reloc_class_ifunc;
4055
0
  }
4056
0
    }
4057
4058
0
  switch (ELF32_R_TYPE (rela->r_info))
4059
0
    {
4060
0
    case R_386_IRELATIVE:
4061
0
      return reloc_class_ifunc;
4062
0
    case R_386_RELATIVE:
4063
0
      return reloc_class_relative;
4064
0
    case R_386_JUMP_SLOT:
4065
0
      return reloc_class_plt;
4066
0
    case R_386_COPY:
4067
0
      return reloc_class_copy;
4068
0
    default:
4069
0
      return reloc_class_normal;
4070
0
    }
4071
0
}
4072
4073
/* Finish up the dynamic sections.  */
4074
4075
static bool
4076
elf_i386_finish_dynamic_sections (bfd *output_bfd,
4077
          struct bfd_link_info *info)
4078
0
{
4079
0
  struct elf_x86_link_hash_table *htab;
4080
4081
0
  htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
4082
0
  if (htab == NULL)
4083
0
    return false;
4084
4085
0
  if (!htab->elf.dynamic_sections_created)
4086
0
    return true;
4087
4088
0
  if (htab->elf.splt && htab->elf.splt->size > 0)
4089
0
    {
4090
0
      if (bfd_is_abs_section (htab->elf.splt->output_section))
4091
0
  {
4092
0
    info->callbacks->einfo
4093
0
      (_("%F%P: discarded output section: `%pA'\n"),
4094
0
       htab->elf.splt);
4095
0
    return false;
4096
0
  }
4097
4098
      /* UnixWare sets the entsize of .plt to 4, although that doesn't
4099
   really seem like the right value.  */
4100
0
      elf_section_data (htab->elf.splt->output_section)
4101
0
  ->this_hdr.sh_entsize = 4;
4102
4103
0
      if (htab->plt.has_plt0)
4104
0
  {
4105
    /* Fill in the special first entry in the procedure linkage
4106
       table.  */
4107
0
    memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
4108
0
      htab->lazy_plt->plt0_entry_size);
4109
0
    memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
4110
0
      htab->plt0_pad_byte,
4111
0
      htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
4112
0
    if (!bfd_link_pic (info))
4113
0
      {
4114
0
        bfd_put_32 (output_bfd,
4115
0
        (htab->elf.sgotplt->output_section->vma
4116
0
         + htab->elf.sgotplt->output_offset
4117
0
         + 4),
4118
0
        htab->elf.splt->contents
4119
0
        + htab->lazy_plt->plt0_got1_offset);
4120
0
        bfd_put_32 (output_bfd,
4121
0
        (htab->elf.sgotplt->output_section->vma
4122
0
         + htab->elf.sgotplt->output_offset
4123
0
         + 8),
4124
0
        htab->elf.splt->contents
4125
0
        + htab->lazy_plt->plt0_got2_offset);
4126
4127
0
        if (htab->elf.target_os == is_vxworks)
4128
0
    {
4129
0
      Elf_Internal_Rela rel;
4130
0
      int num_plts = (htab->elf.splt->size
4131
0
          / htab->plt.plt_entry_size) - 1;
4132
0
      unsigned char *p;
4133
0
      asection *srelplt2 = htab->srelplt2;
4134
4135
      /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4136
         + 4.  On IA32 we use REL relocations so the
4137
         addend goes in the PLT directly.  */
4138
0
      rel.r_offset = (htab->elf.splt->output_section->vma
4139
0
          + htab->elf.splt->output_offset
4140
0
          + htab->lazy_plt->plt0_got1_offset);
4141
0
      rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4142
0
               R_386_32);
4143
0
      bfd_elf32_swap_reloc_out (output_bfd, &rel,
4144
0
              srelplt2->contents);
4145
      /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4146
         + 8.  */
4147
0
      rel.r_offset = (htab->elf.splt->output_section->vma
4148
0
          + htab->elf.splt->output_offset
4149
0
          + htab->lazy_plt->plt0_got2_offset);
4150
0
      rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4151
0
               R_386_32);
4152
0
      bfd_elf32_swap_reloc_out (output_bfd, &rel,
4153
0
              srelplt2->contents +
4154
0
              sizeof (Elf32_External_Rel));
4155
      /* Correct the .rel.plt.unloaded relocations.  */
4156
0
      p = srelplt2->contents;
4157
0
      if (bfd_link_pic (info))
4158
0
        p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4159
0
      else
4160
0
        p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4161
4162
0
      for (; num_plts; num_plts--)
4163
0
        {
4164
0
          bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4165
0
          rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4166
0
             R_386_32);
4167
0
          bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4168
0
          p += sizeof (Elf32_External_Rel);
4169
4170
0
          bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4171
0
          rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4172
0
             R_386_32);
4173
0
          bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4174
0
          p += sizeof (Elf32_External_Rel);
4175
0
        }
4176
0
    }
4177
0
      }
4178
0
  }
4179
0
    }
4180
4181
  /* Fill PLT entries for undefined weak symbols in PIE.  */
4182
0
  if (bfd_link_pie (info))
4183
0
    bfd_hash_traverse (&info->hash->table,
4184
0
           elf_i386_pie_finish_undefweak_symbol,
4185
0
           info);
4186
4187
0
  return true;
4188
0
}
4189
4190
/* Fill PLT/GOT entries and allocate dynamic relocations for local
4191
   STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4192
   It has to be done before elf_link_sort_relocs is called so that
4193
   dynamic relocations are properly sorted.  */
4194
4195
static bool
4196
elf_i386_output_arch_local_syms
4197
  (bfd *output_bfd ATTRIBUTE_UNUSED,
4198
   struct bfd_link_info *info,
4199
   void *flaginfo ATTRIBUTE_UNUSED,
4200
   int (*func) (void *, const char *,
4201
    Elf_Internal_Sym *,
4202
    asection *,
4203
    struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4204
0
{
4205
0
  struct elf_x86_link_hash_table *htab
4206
0
    = elf_x86_hash_table (info, I386_ELF_DATA);
4207
0
  if (htab == NULL)
4208
0
    return false;
4209
4210
  /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols.  */
4211
0
  htab_traverse (htab->loc_hash_table,
4212
0
     elf_i386_finish_local_dynamic_symbol,
4213
0
     info);
4214
4215
0
  return true;
4216
0
}
4217
4218
/* Similar to _bfd_elf_get_synthetic_symtab.  Support PLTs with all
4219
   dynamic relocations.   */
4220
4221
static long
4222
elf_i386_get_synthetic_symtab (bfd *abfd,
4223
             long symcount ATTRIBUTE_UNUSED,
4224
             asymbol **syms ATTRIBUTE_UNUSED,
4225
             long dynsymcount,
4226
             asymbol **dynsyms,
4227
             asymbol **ret)
4228
25
{
4229
25
  long count, i, n;
4230
25
  int j;
4231
25
  bfd_byte *plt_contents;
4232
25
  long relsize;
4233
25
  const struct elf_x86_lazy_plt_layout *lazy_plt;
4234
25
  const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4235
25
  const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4236
25
  const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
4237
25
  asection *plt;
4238
25
  bfd_vma got_addr;
4239
25
  enum elf_x86_plt_type plt_type;
4240
25
  struct elf_x86_plt plts[] =
4241
25
    {
4242
25
      { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4243
25
      { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4244
25
      { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4245
25
      { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
4246
25
    };
4247
4248
25
  *ret = NULL;
4249
4250
25
  if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4251
5
    return 0;
4252
4253
20
  if (dynsymcount <= 0)
4254
1
    return 0;
4255
4256
19
  relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4257
19
  if (relsize <= 0)
4258
0
    return -1;
4259
4260
19
  non_lazy_plt = NULL;
4261
  /* Silence GCC 6.  */
4262
19
  lazy_plt = NULL;
4263
19
  non_lazy_ibt_plt = NULL;
4264
19
  lazy_ibt_plt = NULL;
4265
19
  switch (get_elf_backend_data (abfd)->target_os)
4266
19
    {
4267
19
    case is_normal:
4268
19
    case is_solaris:
4269
19
      non_lazy_plt = &elf_i386_non_lazy_plt;
4270
19
      lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4271
19
      non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4272
      /* Fall through */
4273
19
    case is_vxworks:
4274
19
      lazy_plt = &elf_i386_lazy_plt;
4275
19
      break;
4276
0
    default:
4277
0
      abort ();
4278
19
    }
4279
4280
19
  got_addr = 0;
4281
4282
19
  count = 0;
4283
76
  for (j = 0; plts[j].name != NULL; j++)
4284
57
    {
4285
57
      plt = bfd_get_section_by_name (abfd, plts[j].name);
4286
57
      if (plt == NULL || plt->size == 0)
4287
36
  continue;
4288
4289
      /* Get the PLT section contents.  */
4290
21
      plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4291
21
      if (plt_contents == NULL)
4292
0
  break;
4293
21
      if (!bfd_get_section_contents (abfd, (asection *) plt,
4294
21
             plt_contents, 0, plt->size))
4295
0
  {
4296
0
    free (plt_contents);
4297
0
    break;
4298
0
  }
4299
4300
      /* Check what kind of PLT it is.  */
4301
21
      plt_type = plt_unknown;
4302
21
      if (plts[j].type == plt_unknown
4303
21
    && (plt->size >= (lazy_plt->plt0_entry_size
4304
18
          + lazy_plt->plt_entry_size)))
4305
18
  {
4306
    /* Match lazy PLT first.  */
4307
18
    if (memcmp (plt_contents, lazy_plt->plt0_entry,
4308
18
          lazy_plt->plt0_got1_offset) == 0)
4309
13
      {
4310
        /* The fist entry in the lazy IBT PLT is the same as the
4311
     normal lazy PLT.  */
4312
13
        if (lazy_ibt_plt != NULL
4313
13
      && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4314
13
            lazy_ibt_plt->plt_entry,
4315
13
            lazy_ibt_plt->plt_got_offset) == 0))
4316
0
    plt_type = plt_lazy | plt_second;
4317
13
        else
4318
13
    plt_type = plt_lazy;
4319
13
      }
4320
5
    else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4321
5
         lazy_plt->plt0_got1_offset) == 0)
4322
4
      {
4323
        /* The fist entry in the PIC lazy IBT PLT is the same as
4324
     the normal PIC lazy PLT.  */
4325
4
        if (lazy_ibt_plt != NULL
4326
4
      && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4327
4
            lazy_ibt_plt->pic_plt_entry,
4328
4
            lazy_ibt_plt->plt_got_offset) == 0))
4329
0
    plt_type = plt_lazy | plt_pic | plt_second;
4330
4
        else
4331
4
    plt_type = plt_lazy | plt_pic;
4332
4
      }
4333
18
  }
4334
4335
21
      if (non_lazy_plt != NULL
4336
21
    && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4337
21
    && plt->size >= non_lazy_plt->plt_entry_size)
4338
4
  {
4339
    /* Match non-lazy PLT.  */
4340
4
    if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4341
4
          non_lazy_plt->plt_got_offset) == 0)
4342
0
      plt_type = plt_non_lazy;
4343
4
    else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4344
4
         non_lazy_plt->plt_got_offset) == 0)
4345
2
      plt_type = plt_pic;
4346
4
  }
4347
4348
21
      if ((non_lazy_ibt_plt != NULL)
4349
21
    && (plt_type == plt_unknown || plt_type == plt_second)
4350
21
    && plt->size >= non_lazy_ibt_plt->plt_entry_size)
4351
2
  {
4352
2
    if (memcmp (plt_contents,
4353
2
          non_lazy_ibt_plt->plt_entry,
4354
2
          non_lazy_ibt_plt->plt_got_offset) == 0)
4355
0
      {
4356
        /* Match IBT PLT.  */
4357
0
        plt_type = plt_second;
4358
0
        non_lazy_plt = non_lazy_ibt_plt;
4359
0
      }
4360
2
    else if (memcmp (plt_contents,
4361
2
         non_lazy_ibt_plt->pic_plt_entry,
4362
2
         non_lazy_ibt_plt->plt_got_offset) == 0)
4363
0
      {
4364
        /* Match PIC IBT PLT.  */
4365
0
        plt_type = plt_second | plt_pic;
4366
0
        non_lazy_plt = non_lazy_ibt_plt;
4367
0
      }
4368
2
  }
4369
4370
21
      if (plt_type == plt_unknown)
4371
2
  {
4372
2
    free (plt_contents);
4373
2
    continue;
4374
2
  }
4375
4376
19
      plts[j].sec = plt;
4377
19
      plts[j].type = plt_type;
4378
4379
19
      if ((plt_type & plt_lazy))
4380
17
  {
4381
17
    plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4382
17
    plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4383
    /* Skip PLT0 in lazy PLT.  */
4384
17
    i = 1;
4385
17
  }
4386
2
      else
4387
2
  {
4388
2
    plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4389
2
    plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4390
2
    i = 0;
4391
2
  }
4392
4393
      /* Skip lazy PLT when the second PLT is used.  */
4394
19
      if ((plt_type & (plt_lazy | plt_second))
4395
19
    == (plt_lazy | plt_second))
4396
0
  plts[j].count = 0;
4397
19
      else
4398
19
  {
4399
19
    n = plt->size / plts[j].plt_entry_size;
4400
19
    plts[j].count = n;
4401
19
    count += n - i;
4402
19
  }
4403
4404
19
      plts[j].contents = plt_contents;
4405
4406
      /* The _GLOBAL_OFFSET_TABLE_ address is needed.  */
4407
19
      if ((plt_type & plt_pic))
4408
6
  got_addr = (bfd_vma) -1;
4409
19
    }
4410
4411
19
  return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4412
19
              got_addr, plts, dynsyms,
4413
19
              ret);
4414
19
}
4415
4416
/* Set up i386 GNU properties.  Return the first relocatable ELF input
4417
   with GNU properties if found.  Otherwise, return NULL.  */
4418
4419
static bfd *
4420
elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4421
0
{
4422
0
  struct elf_x86_init_table init_table;
4423
4424
0
  switch (get_elf_backend_data (info->output_bfd)->target_os)
4425
0
    {
4426
0
    case is_normal:
4427
0
    case is_solaris:
4428
0
      init_table.plt0_pad_byte = 0x0;
4429
0
      init_table.lazy_plt = &elf_i386_lazy_plt;
4430
0
      init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4431
0
      init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4432
0
      init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4433
0
      break;
4434
0
    case is_vxworks:
4435
0
      init_table.plt0_pad_byte = 0x90;
4436
0
      init_table.lazy_plt = &elf_i386_lazy_plt;
4437
0
      init_table.non_lazy_plt = NULL;
4438
0
      init_table.lazy_ibt_plt = NULL;
4439
0
      init_table.non_lazy_ibt_plt = NULL;
4440
0
      break;
4441
0
    default:
4442
0
      abort ();
4443
0
    }
4444
4445
0
  init_table.r_info = elf32_r_info;
4446
0
  init_table.r_sym = elf32_r_sym;
4447
4448
0
  return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
4449
0
}
4450
4451
#define TARGET_LITTLE_SYM   i386_elf32_vec
4452
#define TARGET_LITTLE_NAME    "elf32-i386"
4453
#define ELF_ARCH      bfd_arch_i386
4454
#define ELF_TARGET_ID     I386_ELF_DATA
4455
#define ELF_MACHINE_CODE    EM_386
4456
#define ELF_MAXPAGESIZE     0x1000
4457
4458
#define elf_backend_can_gc_sections 1
4459
#define elf_backend_can_refcount  1
4460
#define elf_backend_want_got_plt  1
4461
#define elf_backend_plt_readonly  1
4462
#define elf_backend_want_plt_sym  0
4463
#define elf_backend_got_header_size 12
4464
#define elf_backend_plt_alignment 4
4465
#define elf_backend_dtrel_excludes_plt  1
4466
#define elf_backend_caches_rawsize  1
4467
#define elf_backend_want_dynrelro 1
4468
4469
/* Support RELA for objdump of prelink objects.  */
4470
#define elf_info_to_howto         elf_i386_info_to_howto_rel
4471
#define elf_info_to_howto_rel         elf_i386_info_to_howto_rel
4472
4473
#define bfd_elf32_bfd_is_local_label_name     elf_i386_is_local_label_name
4474
#define bfd_elf32_bfd_reloc_type_lookup       elf_i386_reloc_type_lookup
4475
#define bfd_elf32_bfd_reloc_name_lookup       elf_i386_reloc_name_lookup
4476
#define bfd_elf32_get_synthetic_symtab        elf_i386_get_synthetic_symtab
4477
4478
#define elf_backend_relocs_compatible       _bfd_elf_relocs_compatible
4479
#define elf_backend_early_size_sections       elf_i386_early_size_sections
4480
#define elf_backend_create_dynamic_sections   _bfd_elf_create_dynamic_sections
4481
#define elf_backend_fake_sections       elf_i386_fake_sections
4482
#define elf_backend_finish_dynamic_sections   elf_i386_finish_dynamic_sections
4483
#define elf_backend_finish_dynamic_symbol     elf_i386_finish_dynamic_symbol
4484
#define elf_backend_output_arch_local_syms     elf_i386_output_arch_local_syms
4485
#define elf_backend_grok_prstatus       elf_i386_grok_prstatus
4486
#define elf_backend_grok_psinfo         elf_i386_grok_psinfo
4487
#define elf_backend_reloc_type_class        elf_i386_reloc_type_class
4488
#define elf_backend_relocate_section        elf_i386_relocate_section
4489
#define elf_backend_setup_gnu_properties      elf_i386_link_setup_gnu_properties
4490
#define elf_backend_hide_symbol         _bfd_x86_elf_hide_symbol
4491
4492
#define elf_backend_linux_prpsinfo32_ugid16 true
4493
4494
#define elf32_bed           elf32_i386_bed
4495
4496
#include "elf32-target.h"
4497
4498
/* FreeBSD support.  */
4499
4500
#undef  TARGET_LITTLE_SYM
4501
#define TARGET_LITTLE_SYM   i386_elf32_fbsd_vec
4502
#undef  TARGET_LITTLE_NAME
4503
#define TARGET_LITTLE_NAME    "elf32-i386-freebsd"
4504
#undef  ELF_OSABI
4505
#define ELF_OSABI     ELFOSABI_FREEBSD
4506
4507
/* The kernel recognizes executables as valid only if they carry a
4508
   "FreeBSD" label in the ELF header.  So we put this label on all
4509
   executables and (for simplicity) also all other object files.  */
4510
4511
static bool
4512
elf_i386_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
4513
0
{
4514
0
  if (!_bfd_elf_init_file_header (abfd, info))
4515
0
    return false;
4516
4517
#ifdef OLD_FREEBSD_ABI_LABEL
4518
  {
4519
    /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
4520
    Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4521
    memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4522
  }
4523
#endif
4524
0
  return true;
4525
0
}
4526
4527
#undef  elf_backend_init_file_header
4528
#define elf_backend_init_file_header  elf_i386_fbsd_init_file_header
4529
#undef  elf32_bed
4530
#define elf32_bed       elf32_i386_fbsd_bed
4531
4532
#undef elf_backend_add_symbol_hook
4533
4534
#include "elf32-target.h"
4535
4536
#undef elf_backend_init_file_header
4537
4538
/* Solaris 2.  */
4539
4540
#undef  TARGET_LITTLE_SYM
4541
#define TARGET_LITTLE_SYM   i386_elf32_sol2_vec
4542
#undef  TARGET_LITTLE_NAME
4543
#define TARGET_LITTLE_NAME    "elf32-i386-sol2"
4544
4545
#undef  ELF_TARGET_OS
4546
#define ELF_TARGET_OS     is_solaris
4547
4548
/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4549
   objects won't be recognized.  */
4550
#undef ELF_OSABI
4551
4552
#undef  elf32_bed
4553
#define elf32_bed     elf32_i386_sol2_bed
4554
4555
/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4556
   boundary.  */
4557
#undef  elf_backend_static_tls_alignment
4558
#define elf_backend_static_tls_alignment 8
4559
4560
/* The Solaris 2 ABI requires a plt symbol on all platforms.
4561
4562
   Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4563
   File, p.63.  */
4564
#undef  elf_backend_want_plt_sym
4565
#define elf_backend_want_plt_sym  1
4566
4567
#undef  elf_backend_strtab_flags
4568
#define elf_backend_strtab_flags  SHF_STRINGS
4569
4570
/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
4571
   has a type >= SHT_LOOS.  Returns TRUE if these fields were initialised
4572
   FALSE otherwise.  ISECTION is the best guess matching section from the
4573
   input bfd IBFD, but it might be NULL.  */
4574
4575
static bool
4576
elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4577
            bfd *obfd ATTRIBUTE_UNUSED,
4578
            const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4579
            Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
4580
0
{
4581
  /* PR 19938: FIXME: Need to add code for setting the sh_info
4582
     and sh_link fields of Solaris specific section types.  */
4583
0
  return false;
4584
4585
  /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
4586
     Object File Format, Table 13-9  ELF sh_link and sh_info Interpretation:
4587
4588
http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4589
4590
     The following values should be set:
4591
4592
Type         Link         Info
4593
-----------------------------------------------------------------------------
4594
SHT_SUNW_ancillary   The section header index of    0
4595
 [0x6fffffee]      the associated string table.
4596
4597
SHT_SUNW_capinfo     The section header index of    For a dynamic object, the
4598
 [0x6ffffff0]      the associated symbol table.   section header index of
4599
                the associated
4600
                SHT_SUNW_capchain table,
4601
                otherwise 0.
4602
4603
SHT_SUNW_symsort     The section header index of    0
4604
 [0x6ffffff1]      the associated symbol table.
4605
4606
SHT_SUNW_tlssort     The section header index of    0
4607
 [0x6ffffff2]      the associated symbol table.
4608
4609
SHT_SUNW_LDYNSYM     The section header index of    One greater than the
4610
 [0x6ffffff3]      the associated string table.   symbol table index of the
4611
         This index is the same string  last local symbol,
4612
         table used by the SHT_DYNSYM   STB_LOCAL. Since
4613
         section.         SHT_SUNW_LDYNSYM only
4614
                contains local symbols,
4615
                sh_info is equivalent to
4616
                the number of symbols in
4617
                the table.
4618
4619
SHT_SUNW_cap       If symbol capabilities exist,  If any capabilities refer
4620
 [0x6ffffff5]      the section header index of    to named strings, the
4621
         the associated       section header index of
4622
         SHT_SUNW_capinfo table,      the associated string
4623
        otherwise 0.        table, otherwise 0.
4624
4625
SHT_SUNW_move      The section header index of    0
4626
 [0x6ffffffa]      the associated symbol table.
4627
4628
SHT_SUNW_COMDAT      0            0
4629
 [0x6ffffffb]
4630
4631
SHT_SUNW_syminfo     The section header index of    The section header index
4632
 [0x6ffffffc]      the associated symbol table.   of the associated
4633
                .dynamic section.
4634
4635
SHT_SUNW_verdef      The section header index of    The number of version
4636
 [0x6ffffffd]      the associated string table.   definitions within the
4637
                section.
4638
4639
SHT_SUNW_verneed     The section header index of    The number of version
4640
 [0x6ffffffe]      the associated string table.   dependencies within the
4641
                section.
4642
4643
SHT_SUNW_versym      The section header index of    0
4644
 [0x6fffffff]      the associated symbol table.  */
4645
0
}
4646
4647
#undef  elf_backend_copy_special_section_fields
4648
#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
4649
4650
#include "elf32-target.h"
4651
4652
/* Intel MCU support.  */
4653
4654
static bool
4655
elf32_iamcu_elf_object_p (bfd *abfd)
4656
1.35k
{
4657
  /* Set the right machine number for an IAMCU elf32 file.  */
4658
1.35k
  bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4659
1.35k
  return true;
4660
1.35k
}
4661
4662
#undef  TARGET_LITTLE_SYM
4663
#define TARGET_LITTLE_SYM   iamcu_elf32_vec
4664
#undef  TARGET_LITTLE_NAME
4665
#define TARGET_LITTLE_NAME    "elf32-iamcu"
4666
#undef  ELF_ARCH
4667
#define ELF_ARCH      bfd_arch_iamcu
4668
4669
#undef  ELF_MACHINE_CODE
4670
#define ELF_MACHINE_CODE    EM_IAMCU
4671
4672
#undef  ELF_TARGET_OS
4673
#undef  ELF_OSABI
4674
4675
#undef  elf32_bed
4676
#define elf32_bed     elf32_iamcu_bed
4677
4678
#undef  elf_backend_object_p
4679
#define elf_backend_object_p    elf32_iamcu_elf_object_p
4680
4681
#undef  elf_backend_static_tls_alignment
4682
4683
#undef  elf_backend_want_plt_sym
4684
#define elf_backend_want_plt_sym  0
4685
4686
#undef  elf_backend_strtab_flags
4687
#undef  elf_backend_copy_special_section_fields
4688
4689
#include "elf32-target.h"
4690
4691
/* Restore defaults.  */
4692
#undef  ELF_ARCH
4693
#define ELF_ARCH      bfd_arch_i386
4694
#undef  ELF_MACHINE_CODE
4695
#define ELF_MACHINE_CODE    EM_386
4696
#undef  elf_backend_object_p
4697
4698
/* VxWorks support.  */
4699
4700
#undef  TARGET_LITTLE_SYM
4701
#define TARGET_LITTLE_SYM   i386_elf32_vxworks_vec
4702
#undef  TARGET_LITTLE_NAME
4703
#define TARGET_LITTLE_NAME    "elf32-i386-vxworks"
4704
#undef  ELF_OSABI
4705
#undef  ELF_MAXPAGESIZE
4706
#define ELF_MAXPAGESIZE     0x1000
4707
#undef  elf_backend_plt_alignment
4708
#define elf_backend_plt_alignment 4
4709
4710
#undef  ELF_TARGET_OS
4711
#define ELF_TARGET_OS   is_vxworks
4712
4713
#undef elf_backend_relocs_compatible
4714
#undef elf_backend_add_symbol_hook
4715
#define elf_backend_add_symbol_hook \
4716
  elf_vxworks_add_symbol_hook
4717
#undef elf_backend_link_output_symbol_hook
4718
#define elf_backend_link_output_symbol_hook \
4719
  elf_vxworks_link_output_symbol_hook
4720
#undef elf_backend_emit_relocs
4721
#define elf_backend_emit_relocs     elf_vxworks_emit_relocs
4722
#undef elf_backend_final_write_processing
4723
#define elf_backend_final_write_processing \
4724
  elf_vxworks_final_write_processing
4725
#undef elf_backend_static_tls_alignment
4726
4727
/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4728
   define it.  */
4729
#undef elf_backend_want_plt_sym
4730
#define elf_backend_want_plt_sym  1
4731
4732
#undef  elf32_bed
4733
#define elf32_bed       elf32_i386_vxworks_bed
4734
4735
#include "elf32-target.h"