Fix the disassembly of the AArch64 SIMD EXT instruction.
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
b90efa5b 2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
252b5132 3
571fe01f 4 This file is part of BFD, the Binary File Descriptor library.
252b5132 5
571fe01f
NC
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
cd123cb7 8 the Free Software Foundation; either version 3 of the License, or
571fe01f 9 (at your option) any later version.
252b5132 10
571fe01f
NC
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.
252b5132 15
571fe01f
NC
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
cd123cb7
NC
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
252b5132 20
252b5132 21#include "sysdep.h"
3db64b00 22#include "bfd.h"
252b5132
RH
23#include "bfdlink.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
5a68afcf 26#include "elf-nacl.h"
eac338cf 27#include "elf-vxworks.h"
142411ca 28#include "bfd_stdint.h"
c25bc9fc
L
29#include "objalloc.h"
30#include "hashtab.h"
e41b3a13 31#include "dwarf2.h"
252b5132 32
55fd94b0
AM
33/* 386 uses REL relocations instead of RELA. */
34#define USE_REL 1
252b5132
RH
35
36#include "elf/i386.h"
37
38static reloc_howto_type elf_howto_table[]=
39{
6346d5ca 40 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
1b452ec6 41 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM
42 TRUE, 0x00000000, 0x00000000, FALSE),
43 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 44 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 47 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 50 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 53 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM
54 TRUE, 0xffffffff, 0xffffffff, TRUE),
55 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 56 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 59 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 62 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 65 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM
66 TRUE, 0xffffffff, 0xffffffff, FALSE),
67 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 68 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM
69 TRUE, 0xffffffff, 0xffffffff, FALSE),
70 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 71 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 72 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 73
dc47f327
AM
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM
78#define R_386_standard (R_386_GOTPC + 1)
79#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 80
37e55690 81 /* These relocs are a GNU extension. */
b34976b6 82 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 83 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 86 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 89 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 92 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 95 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM
96 TRUE, 0xffffffff, 0xffffffff, FALSE),
97 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 98 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM
99 TRUE, 0xffffffff, 0xffffffff, FALSE),
100 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 101 bfd_elf_generic_reloc, "R_386_16",
b34976b6 102 TRUE, 0xffff, 0xffff, FALSE),
b0360d8c 103 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 104 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM
105 TRUE, 0xffff, 0xffff, TRUE),
106 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 107 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM
108 TRUE, 0xff, 0xff, FALSE),
109 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 110 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 111 TRUE, 0xff, 0xff, TRUE),
dc47f327 112
55fd94b0
AM
113#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 115 /* These are common with Solaris TLS implementation. */
b34976b6 116 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 117 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 120 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 123 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 126 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 129 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 132 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 133 TRUE, 0xffffffff, 0xffffffff, FALSE),
1788fc08
L
134 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
135 bfd_elf_generic_reloc, "R_386_SIZE32",
136 TRUE, 0xffffffff, 0xffffffff, FALSE),
67a4f2b7
AO
137 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
142 FALSE, 0, 0, FALSE),
143 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_TLS_DESC",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
cbe950e9
L
146 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_386_IRELATIVE",
148 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ
149
150 /* Another gap. */
cbe950e9
L
151#define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
252b5132
RH
153
154/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH
155 HOWTO (R_386_GNU_VTINHERIT, /* type */
156 0, /* rightshift */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
158 0, /* bitsize */
b34976b6 159 FALSE, /* pc_relative */
252b5132
RH
160 0, /* bitpos */
161 complain_overflow_dont, /* complain_on_overflow */
162 NULL, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
b34976b6 164 FALSE, /* partial_inplace */
252b5132
RH
165 0, /* src_mask */
166 0, /* dst_mask */
b34976b6 167 FALSE), /* pcrel_offset */
252b5132
RH
168
169/* GNU extension to record C++ vtable member usage. */
252b5132
RH
170 HOWTO (R_386_GNU_VTENTRY, /* type */
171 0, /* rightshift */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
173 0, /* bitsize */
b34976b6 174 FALSE, /* pc_relative */
252b5132
RH
175 0, /* bitpos */
176 complain_overflow_dont, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
b34976b6 179 FALSE, /* partial_inplace */
252b5132
RH
180 0, /* src_mask */
181 0, /* dst_mask */
b34976b6 182 FALSE) /* pcrel_offset */
dc47f327 183
55fd94b0 184#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM
185
186};
187
252b5132 188#ifdef DEBUG_GEN_RELOC
55fd94b0
AM
189#define TRACE(str) \
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH
191#else
192#define TRACE(str)
193#endif
194
195static reloc_howto_type *
55fd94b0
AM
196elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
197 bfd_reloc_code_real_type code)
252b5132
RH
198{
199 switch (code)
200 {
201 case BFD_RELOC_NONE:
202 TRACE ("BFD_RELOC_NONE");
55fd94b0 203 return &elf_howto_table[R_386_NONE];
252b5132
RH
204
205 case BFD_RELOC_32:
206 TRACE ("BFD_RELOC_32");
55fd94b0 207 return &elf_howto_table[R_386_32];
252b5132
RH
208
209 case BFD_RELOC_CTOR:
210 TRACE ("BFD_RELOC_CTOR");
55fd94b0 211 return &elf_howto_table[R_386_32];
252b5132
RH
212
213 case BFD_RELOC_32_PCREL:
214 TRACE ("BFD_RELOC_PC32");
55fd94b0 215 return &elf_howto_table[R_386_PC32];
252b5132
RH
216
217 case BFD_RELOC_386_GOT32:
218 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 219 return &elf_howto_table[R_386_GOT32];
252b5132
RH
220
221 case BFD_RELOC_386_PLT32:
222 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 223 return &elf_howto_table[R_386_PLT32];
252b5132
RH
224
225 case BFD_RELOC_386_COPY:
226 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 227 return &elf_howto_table[R_386_COPY];
252b5132
RH
228
229 case BFD_RELOC_386_GLOB_DAT:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 231 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH
232
233 case BFD_RELOC_386_JUMP_SLOT:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 235 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH
236
237 case BFD_RELOC_386_RELATIVE:
238 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 239 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH
240
241 case BFD_RELOC_386_GOTOFF:
242 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 243 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH
244
245 case BFD_RELOC_386_GOTPC:
246 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 247 return &elf_howto_table[R_386_GOTPC];
252b5132 248
37e55690
JJ
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 252 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ
253
254 case BFD_RELOC_386_TLS_IE:
255 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 256 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ
257
258 case BFD_RELOC_386_TLS_GOTIE:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 260 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 261
13ae64f3
JJ
262 case BFD_RELOC_386_TLS_LE:
263 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 264 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ
265
266 case BFD_RELOC_386_TLS_GD:
267 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 268 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ
269
270 case BFD_RELOC_386_TLS_LDM:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 272 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 273
252b5132
RH
274 case BFD_RELOC_16:
275 TRACE ("BFD_RELOC_16");
55fd94b0 276 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH
277
278 case BFD_RELOC_16_PCREL:
279 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 280 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH
281
282 case BFD_RELOC_8:
283 TRACE ("BFD_RELOC_8");
55fd94b0 284 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH
285
286 case BFD_RELOC_8_PCREL:
287 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 288 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 289
13ae64f3
JJ
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 293 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ
294
295 case BFD_RELOC_386_TLS_IE_32:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 297 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ
298
299 case BFD_RELOC_386_TLS_LE_32:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 301 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ
302
303 case BFD_RELOC_386_TLS_DTPMOD32:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 305 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ
306
307 case BFD_RELOC_386_TLS_DTPOFF32:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 309 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ
310
311 case BFD_RELOC_386_TLS_TPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 313 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 314
1788fc08
L
315 case BFD_RELOC_SIZE32:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
318
67a4f2b7
AO
319 case BFD_RELOC_386_TLS_GOTDESC:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
322
323 case BFD_RELOC_386_TLS_DESC_CALL:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
326
327 case BFD_RELOC_386_TLS_DESC:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
330
cbe950e9
L
331 case BFD_RELOC_386_IRELATIVE:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
2a750708 333 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
cbe950e9 334
252b5132
RH
335 case BFD_RELOC_VTABLE_INHERIT:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 337 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH
338
339 case BFD_RELOC_VTABLE_ENTRY:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 341 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH
342
343 default:
344 break;
345 }
346
347 TRACE ("Unknown");
348 return 0;
349}
350
157090f7
AM
351static reloc_howto_type *
352elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
353 const char *r_name)
354{
355 unsigned int i;
356
357 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
358 if (elf_howto_table[i].name != NULL
359 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
360 return &elf_howto_table[i];
361
362 return NULL;
363}
364
142411ca
L
365static reloc_howto_type *
366elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
252b5132 367{
dc47f327
AM
368 unsigned int indx;
369
370 if ((indx = r_type) >= R_386_standard
371 && ((indx = r_type - R_386_ext_offset) - R_386_standard
372 >= R_386_ext - R_386_standard)
13ae64f3 373 && ((indx = r_type - R_386_tls_offset) - R_386_ext
cbe950e9
L
374 >= R_386_irelative - R_386_ext)
375 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
376 >= R_386_vt - R_386_irelative))
252b5132 377 {
d003868e
AM
378 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
379 abfd, (int) r_type);
55fd94b0 380 indx = R_386_NONE;
252b5132 381 }
06614111
NC
382 /* PR 17512: file: 0f67f69d. */
383 if (elf_howto_table [indx].type != r_type)
384 return NULL;
142411ca
L
385 return &elf_howto_table[indx];
386}
387
388static void
389elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
390 arelent *cache_ptr,
391 Elf_Internal_Rela *dst)
392{
393 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
394 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
252b5132
RH
395}
396
397/* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
402
b34976b6 403static bfd_boolean
55fd94b0 404elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH
405{
406 if (name[0] == '.' && name[1] == 'X')
b34976b6 407 return TRUE;
252b5132
RH
408
409 return _bfd_elf_is_local_label_name (abfd, name);
410}
411\f
38701953 412/* Support for core dump NOTE sections. */
61adc1a4 413
b34976b6 414static bfd_boolean
55fd94b0 415elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM
416{
417 int offset;
eea6121a 418 size_t size;
38701953 419
61adc1a4 420 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 421 {
61adc1a4
NC
422 int pr_version = bfd_get_32 (abfd, note->descdata);
423
424 if (pr_version != 1)
425 return FALSE;
426
427 /* pr_cursig */
228e534f 428 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
61adc1a4
NC
429
430 /* pr_pid */
228e534f 431 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
61adc1a4
NC
432
433 /* pr_reg */
434 offset = 28;
eea6121a 435 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC
436 }
437 else
438 {
439 switch (note->descsz)
440 {
441 default:
442 return FALSE;
38701953 443
61adc1a4
NC
444 case 144: /* Linux/i386 */
445 /* pr_cursig */
228e534f 446 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 447
61adc1a4 448 /* pr_pid */
228e534f 449 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
38701953 450
61adc1a4
NC
451 /* pr_reg */
452 offset = 72;
eea6121a 453 size = 68;
38701953 454
61adc1a4
NC
455 break;
456 }
38701953
AM
457 }
458
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 461 size, note->descpos + offset);
38701953
AM
462}
463
b34976b6 464static bfd_boolean
55fd94b0 465elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 466{
61adc1a4 467 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 468 {
61adc1a4
NC
469 int pr_version = bfd_get_32 (abfd, note->descdata);
470
471 if (pr_version != 1)
b34976b6 472 return FALSE;
38701953 473
228e534f 474 elf_tdata (abfd)->core->program
61adc1a4 475 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
228e534f 476 elf_tdata (abfd)->core->command
61adc1a4
NC
477 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
478 }
479 else
480 {
481 switch (note->descsz)
482 {
483 default:
484 return FALSE;
485
486 case 124: /* Linux/i386 elf_prpsinfo. */
228e534f 487 elf_tdata (abfd)->core->pid
261b8d08 488 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 489 elf_tdata (abfd)->core->program
61adc1a4 490 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 491 elf_tdata (abfd)->core->command
61adc1a4
NC
492 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
493 }
38701953
AM
494 }
495
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
38701953 499 {
228e534f 500 char *command = elf_tdata (abfd)->core->command;
38701953
AM
501 int n = strlen (command);
502
503 if (0 < n && command[n - 1] == ' ')
504 command[n - 1] = '\0';
505 }
506
b34976b6 507 return TRUE;
38701953
AM
508}
509\f
510/* Functions for the i386 ELF linker.
511
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
514 following:
515
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
522
252b5132
RH
523
524/* The name of the dynamic interpreter. This is put in the .interp
525 section. */
526
527#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
528
a23b6845
AM
529/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
532 shared lib. */
533#define ELIMINATE_COPY_RELOCS 1
534
252b5132
RH
535/* The size in bytes of an entry in the procedure linkage table. */
536
537#define PLT_ENTRY_SIZE 16
538
539/* The first entry in an absolute procedure linkage table looks like
eac338cf
PB
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 542
eac338cf 543static const bfd_byte elf_i386_plt0_entry[12] =
252b5132
RH
544{
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
eac338cf 548 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH
549};
550
551/* Subsequent entries in an absolute procedure linkage table look like
552 this. */
553
554static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
555{
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
562};
563
eac338cf
PB
564/* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 566
eac338cf 567static const bfd_byte elf_i386_pic_plt0_entry[12] =
252b5132
RH
568{
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH
571};
572
573/* Subsequent entries in a PIC procedure linkage table look like this. */
574
575static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
576{
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
583};
584
dd7e64d4
L
585/* Entries in the GOT procedure linkage table look like this. */
586
587static const bfd_byte elf_i386_got_plt_entry[8] =
588{
589 0xff, 0x25, /* jmp indirect */
590 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
591 0x66, 0x90 /* xchg %ax,%ax */
592};
593
594/* Entries in the PIC GOT procedure linkage table look like this. */
595
596static const bfd_byte elf_i386_pic_got_plt_entry[8] =
597{
598 0xff, 0xa3, /* jmp *offset(%ebx) */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
601};
602
e41b3a13
JJ
603/* .eh_frame covering the .plt section. */
604
605static const bfd_byte elf_i386_eh_frame_plt[] =
606{
607#define PLT_CIE_LENGTH 20
608#define PLT_FDE_LENGTH 36
609#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
610#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
611 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
612 0, 0, 0, 0, /* CIE ID */
613 1, /* CIE version */
614 'z', 'R', 0, /* Augmentation string */
615 1, /* Code alignment factor */
616 0x7c, /* Data alignment factor */
617 8, /* Return address column */
618 1, /* Augmentation size */
619 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
620 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
621 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
622 DW_CFA_nop, DW_CFA_nop,
623
624 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
625 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
626 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
627 0, 0, 0, 0, /* .plt size goes here */
628 0, /* Augmentation size */
629 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
630 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
631 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
632 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
633 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
634 11, /* Block length */
635 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
636 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
637 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 638 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ
639 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
640};
641
25e762b9
RM
642struct elf_i386_plt_layout
643{
644 /* The first entry in an absolute procedure linkage table looks like this. */
645 const bfd_byte *plt0_entry;
646 unsigned int plt0_entry_size;
647
648 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
649 unsigned int plt0_got1_offset;
650 unsigned int plt0_got2_offset;
651
652 /* Later entries in an absolute procedure linkage table look like this. */
653 const bfd_byte *plt_entry;
654 unsigned int plt_entry_size;
655
656 /* Offsets into plt_entry that are to be replaced with... */
657 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
658 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
659 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
660
661 /* Offset into plt_entry where the initial value of the GOT entry points. */
662 unsigned int plt_lazy_offset;
663
664 /* The first entry in a PIC procedure linkage table looks like this. */
665 const bfd_byte *pic_plt0_entry;
666
667 /* Subsequent entries in a PIC procedure linkage table look like this. */
668 const bfd_byte *pic_plt_entry;
669
670 /* .eh_frame covering the .plt section. */
671 const bfd_byte *eh_frame_plt;
672 unsigned int eh_frame_plt_size;
673};
674
675#define GET_PLT_ENTRY_SIZE(abfd) \
676 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
677
678/* These are the standard parameters. */
679static const struct elf_i386_plt_layout elf_i386_plt =
680 {
681 elf_i386_plt0_entry, /* plt0_entry */
682 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
683 2, /* plt0_got1_offset */
684 8, /* plt0_got2_offset */
685 elf_i386_plt_entry, /* plt_entry */
686 PLT_ENTRY_SIZE, /* plt_entry_size */
687 2, /* plt_got_offset */
688 7, /* plt_reloc_offset */
689 12, /* plt_plt_offset */
690 6, /* plt_lazy_offset */
691 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
692 elf_i386_pic_plt_entry, /* pic_plt_entry */
693 elf_i386_eh_frame_plt, /* eh_frame_plt */
694 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
695 };
696\f
697
eac338cf
PB
698/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
699 for the PLTResolve stub and then for each PLT entry. */
700#define PLTRESOLVE_RELOCS_SHLIB 0
701#define PLTRESOLVE_RELOCS 2
702#define PLT_NON_JUMP_SLOT_RELOCS 2
703
23209a78
RM
704/* Architecture-specific backend data for i386. */
705
706struct elf_i386_backend_data
707{
25e762b9
RM
708 /* Parameters describing PLT generation. */
709 const struct elf_i386_plt_layout *plt;
710
23209a78
RM
711 /* Value used to fill the unused bytes of the first PLT entry. */
712 bfd_byte plt0_pad_byte;
713
714 /* True if the target system is VxWorks. */
715 int is_vxworks;
716};
717
718#define get_elf_i386_backend_data(abfd) \
719 ((const struct elf_i386_backend_data *) \
720 get_elf_backend_data (abfd)->arch_data)
721
722/* These are the standard parameters. */
723static const struct elf_i386_backend_data elf_i386_arch_bed =
724 {
25e762b9 725 &elf_i386_plt, /* plt */
23209a78
RM
726 0, /* plt0_pad_byte */
727 0, /* is_vxworks */
728 };
729
730#define elf_backend_arch_data &elf_i386_arch_bed
731
252b5132
RH
732/* i386 ELF linker hash entry. */
733
734struct elf_i386_link_hash_entry
735{
ebe50bae 736 struct elf_link_hash_entry elf;
252b5132 737
0c715baa 738 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 739 struct elf_dyn_relocs *dyn_relocs;
13ae64f3 740
37e55690
JJ
741#define GOT_UNKNOWN 0
742#define GOT_NORMAL 1
743#define GOT_TLS_GD 2
744#define GOT_TLS_IE 4
745#define GOT_TLS_IE_POS 5
746#define GOT_TLS_IE_NEG 6
747#define GOT_TLS_IE_BOTH 7
67a4f2b7
AO
748#define GOT_TLS_GDESC 8
749#define GOT_TLS_GD_BOTH_P(type) \
750 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
751#define GOT_TLS_GD_P(type) \
752 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
753#define GOT_TLS_GDESC_P(type) \
754 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
755#define GOT_TLS_GD_ANY_P(type) \
756 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
37e55690 757 unsigned char tls_type;
67a4f2b7 758
d5597ebc
L
759 /* Symbol is referenced by R_386_GOTOFF relocation. */
760 unsigned int gotoff_ref : 1;
761
dd7e64d4
L
762 /* Information about the GOT PLT entry. Filled when there are both
763 GOT and PLT relocations against the same function. */
764 union gotplt_union plt_got;
765
67a4f2b7
AO
766 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
767 starting at the end of the jump table. */
768 bfd_vma tlsdesc_got;
13ae64f3
JJ
769};
770
771#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
772
773struct elf_i386_obj_tdata
774{
775 struct elf_obj_tdata root;
776
777 /* tls_type for each local got entry. */
778 char *local_got_tls_type;
67a4f2b7
AO
779
780 /* GOTPLT entries for TLS descriptors. */
781 bfd_vma *local_tlsdesc_gotent;
252b5132
RH
782};
783
13ae64f3
JJ
784#define elf_i386_tdata(abfd) \
785 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
786
787#define elf_i386_local_got_tls_type(abfd) \
788 (elf_i386_tdata (abfd)->local_got_tls_type)
789
67a4f2b7
AO
790#define elf_i386_local_tlsdesc_gotent(abfd) \
791 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
792
0ffa91dd
NC
793#define is_i386_elf(bfd) \
794 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
795 && elf_tdata (bfd) != NULL \
4dfe6ac6 796 && elf_object_id (bfd) == I386_ELF_DATA)
0ffa91dd 797
b34976b6 798static bfd_boolean
55fd94b0 799elf_i386_mkobject (bfd *abfd)
13ae64f3 800{
0ffa91dd 801 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
4dfe6ac6 802 I386_ELF_DATA);
13ae64f3 803}
cedb70c5 804
252b5132
RH
805/* i386 ELF linker hash table. */
806
807struct elf_i386_link_hash_table
808{
ebe50bae 809 struct elf_link_hash_table elf;
252b5132 810
6725bdbf 811 /* Short-cuts to get to dynamic linker sections. */
6725bdbf
AM
812 asection *sdynbss;
813 asection *srelbss;
e41b3a13 814 asection *plt_eh_frame;
dd7e64d4 815 asection *plt_got;
9635fe29 816
4dfe6ac6
NC
817 union
818 {
13ae64f3
JJ
819 bfd_signed_vma refcount;
820 bfd_vma offset;
821 } tls_ldm_got;
822
67a4f2b7
AO
823 /* The amount of space used by the reserved portion of the sgotplt
824 section, plus whatever space is used by the jump slots. */
825 bfd_vma sgotplt_jump_table_size;
826
87d72d41
AM
827 /* Small local sym cache. */
828 struct sym_cache sym_cache;
9f03412a
AO
829
830 /* _TLS_MODULE_BASE_ symbol. */
831 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L
832
833 /* Used by local STT_GNU_IFUNC symbols. */
834 htab_t loc_hash_table;
4dfe6ac6
NC
835 void * loc_hash_memory;
836
837 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
838 asection *srelplt2;
839
4dfe6ac6
NC
840 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
841 bfd_vma next_tls_desc_index;
e1f98742
L
842
843 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
844 bfd_vma next_jump_slot_index;
845
846 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
847 bfd_vma next_irelative_index;
6725bdbf 848};
252b5132
RH
849
850/* Get the i386 ELF linker hash table from a link_info structure. */
851
852#define elf_i386_hash_table(p) \
4dfe6ac6
NC
853 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
854 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
252b5132 855
67a4f2b7 856#define elf_i386_compute_jump_table_size(htab) \
998d811a 857 ((htab)->elf.srelplt->reloc_count * 4)
67a4f2b7 858
252b5132
RH
859/* Create an entry in an i386 ELF linker hash table. */
860
861static struct bfd_hash_entry *
eb4ff4d6
L
862elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
863 struct bfd_hash_table *table,
864 const char *string)
252b5132 865{
252b5132
RH
866 /* Allocate the structure if it has not already been allocated by a
867 subclass. */
ebe50bae
AM
868 if (entry == NULL)
869 {
a50b1753
NC
870 entry = (struct bfd_hash_entry *)
871 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
ebe50bae
AM
872 if (entry == NULL)
873 return entry;
874 }
252b5132
RH
875
876 /* Call the allocation method of the superclass. */
ebe50bae
AM
877 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
878 if (entry != NULL)
252b5132 879 {
ebe50bae
AM
880 struct elf_i386_link_hash_entry *eh;
881
882 eh = (struct elf_i386_link_hash_entry *) entry;
883 eh->dyn_relocs = NULL;
13ae64f3 884 eh->tls_type = GOT_UNKNOWN;
d5597ebc 885 eh->gotoff_ref = 0;
dd7e64d4 886 eh->plt_got.offset = (bfd_vma) -1;
67a4f2b7 887 eh->tlsdesc_got = (bfd_vma) -1;
252b5132
RH
888 }
889
ebe50bae 890 return entry;
252b5132
RH
891}
892
c25bc9fc
L
893/* Compute a hash of a local hash entry. We use elf_link_hash_entry
894 for local symbol so that we can handle local STT_GNU_IFUNC symbols
895 as global symbol. We reuse indx and dynstr_index for local symbol
896 hash since they aren't used by global symbols in this backend. */
897
898static hashval_t
899elf_i386_local_htab_hash (const void *ptr)
900{
901 struct elf_link_hash_entry *h
902 = (struct elf_link_hash_entry *) ptr;
d2149d72 903 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L
904}
905
906/* Compare local hash entries. */
907
908static int
909elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
910{
911 struct elf_link_hash_entry *h1
912 = (struct elf_link_hash_entry *) ptr1;
913 struct elf_link_hash_entry *h2
914 = (struct elf_link_hash_entry *) ptr2;
915
916 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
917}
918
919/* Find and/or create a hash entry for local symbol. */
920
921static struct elf_link_hash_entry *
922elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
923 bfd *abfd, const Elf_Internal_Rela *rel,
924 bfd_boolean create)
925{
926 struct elf_i386_link_hash_entry e, *ret;
927 asection *sec = abfd->sections;
d2149d72
L
928 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
929 ELF32_R_SYM (rel->r_info));
c25bc9fc
L
930 void **slot;
931
932 e.elf.indx = sec->id;
933 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
934 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
935 create ? INSERT : NO_INSERT);
936
937 if (!slot)
938 return NULL;
939
940 if (*slot)
941 {
942 ret = (struct elf_i386_link_hash_entry *) *slot;
943 return &ret->elf;
944 }
945
946 ret = (struct elf_i386_link_hash_entry *)
947 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
948 sizeof (struct elf_i386_link_hash_entry));
949 if (ret)
950 {
951 memset (ret, 0, sizeof (*ret));
952 ret->elf.indx = sec->id;
953 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
954 ret->elf.dynindx = -1;
dd7e64d4 955 ret->plt_got.offset = (bfd_vma) -1;
c25bc9fc
L
956 *slot = ret;
957 }
958 return &ret->elf;
959}
960
68faa637
AM
961/* Destroy an i386 ELF linker hash table. */
962
963static void
d495ab0d 964elf_i386_link_hash_table_free (bfd *obfd)
68faa637
AM
965{
966 struct elf_i386_link_hash_table *htab
d495ab0d 967 = (struct elf_i386_link_hash_table *) obfd->link.hash;
68faa637
AM
968
969 if (htab->loc_hash_table)
970 htab_delete (htab->loc_hash_table);
971 if (htab->loc_hash_memory)
972 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
d495ab0d 973 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM
974}
975
252b5132
RH
976/* Create an i386 ELF linker hash table. */
977
978static struct bfd_link_hash_table *
55fd94b0 979elf_i386_link_hash_table_create (bfd *abfd)
252b5132
RH
980{
981 struct elf_i386_link_hash_table *ret;
dc810e39 982 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
252b5132 983
7bf52ea2 984 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
ebe50bae 985 if (ret == NULL)
252b5132
RH
986 return NULL;
987
eb4ff4d6
L
988 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
989 elf_i386_link_hash_newfunc,
4dfe6ac6
NC
990 sizeof (struct elf_i386_link_hash_entry),
991 I386_ELF_DATA))
252b5132 992 {
e2d34d7d 993 free (ret);
252b5132
RH
994 return NULL;
995 }
996
c25bc9fc
L
997 ret->loc_hash_table = htab_try_create (1024,
998 elf_i386_local_htab_hash,
999 elf_i386_local_htab_eq,
1000 NULL);
1001 ret->loc_hash_memory = objalloc_create ();
1002 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1003 {
d495ab0d 1004 elf_i386_link_hash_table_free (abfd);
c25bc9fc
L
1005 return NULL;
1006 }
d495ab0d 1007 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
c25bc9fc 1008
ebe50bae 1009 return &ret->elf.root;
252b5132
RH
1010}
1011
6725bdbf
AM
1012/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1013 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1014 hash table. */
1015
b34976b6 1016static bfd_boolean
55fd94b0 1017elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM
1018{
1019 struct elf_i386_link_hash_table *htab;
1020
6725bdbf 1021 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 1022 return FALSE;
6725bdbf 1023
6de2ae4a 1024 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
1025 if (htab == NULL)
1026 return FALSE;
1027
3d4d4302 1028 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
d5597ebc 1029 if (!htab->sdynbss)
6725bdbf
AM
1030 abort ();
1031
d5597ebc
L
1032 if (info->executable)
1033 {
1034 /* Always allow copy relocs for building executables. */
1035 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1036 if (s == NULL)
1037 {
1038 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1039 s = bfd_make_section_anyway_with_flags (dynobj,
1040 ".rel.bss",
1041 (bed->dynamic_sec_flags
1042 | SEC_READONLY));
1043 if (s == NULL
1044 || ! bfd_set_section_alignment (dynobj, s,
1045 bed->s->log_file_align))
1046 return FALSE;
1047 }
1048 htab->srelbss = s;
1049 }
1050
23209a78 1051 if (get_elf_i386_backend_data (dynobj)->is_vxworks
6de2ae4a
L
1052 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1053 &htab->srelplt2))
711de32c 1054 return FALSE;
eac338cf 1055
e41b3a13 1056 if (!info->no_ld_generated_unwind_info
2fe0fd06 1057 && htab->plt_eh_frame == NULL
e4de50d4 1058 && htab->elf.splt != NULL)
e41b3a13 1059 {
bbf96e4e
L
1060 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1061 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1062 | SEC_LINKER_CREATED);
e41b3a13 1063 htab->plt_eh_frame
bbf96e4e 1064 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ
1065 if (htab->plt_eh_frame == NULL
1066 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1067 return FALSE;
e41b3a13
JJ
1068 }
1069
b34976b6 1070 return TRUE;
6725bdbf
AM
1071}
1072
ebe50bae
AM
1073/* Copy the extra info we tack onto an elf_link_hash_entry. */
1074
51b64d56 1075static void
fcfa13d2 1076elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
55fd94b0
AM
1077 struct elf_link_hash_entry *dir,
1078 struct elf_link_hash_entry *ind)
ebe50bae
AM
1079{
1080 struct elf_i386_link_hash_entry *edir, *eind;
1081
1082 edir = (struct elf_i386_link_hash_entry *) dir;
1083 eind = (struct elf_i386_link_hash_entry *) ind;
1084
bbd7ec4a 1085 if (eind->dyn_relocs != NULL)
ebe50bae 1086 {
bbd7ec4a
AM
1087 if (edir->dyn_relocs != NULL)
1088 {
e03a8ed8
L
1089 struct elf_dyn_relocs **pp;
1090 struct elf_dyn_relocs *p;
bbd7ec4a 1091
fcfa13d2 1092 /* Add reloc counts against the indirect sym to the direct sym
bbd7ec4a
AM
1093 list. Merge any entries against the same section. */
1094 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1095 {
e03a8ed8 1096 struct elf_dyn_relocs *q;
bbd7ec4a
AM
1097
1098 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1099 if (q->sec == p->sec)
1100 {
1101 q->pc_count += p->pc_count;
1102 q->count += p->count;
1103 *pp = p->next;
1104 break;
1105 }
1106 if (q == NULL)
1107 pp = &p->next;
1108 }
1109 *pp = edir->dyn_relocs;
1110 }
1111
ebe50bae
AM
1112 edir->dyn_relocs = eind->dyn_relocs;
1113 eind->dyn_relocs = NULL;
1114 }
ebe50bae 1115
cd67d266
JJ
1116 if (ind->root.type == bfd_link_hash_indirect
1117 && dir->got.refcount <= 0)
1118 {
1119 edir->tls_type = eind->tls_type;
1120 eind->tls_type = GOT_UNKNOWN;
1121 }
81848ca0 1122
d5597ebc
L
1123 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1124 generate a R_386_COPY reloc. */
1125 edir->gotoff_ref |= eind->gotoff_ref;
1126
81848ca0
AM
1127 if (ELIMINATE_COPY_RELOCS
1128 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM
1129 && dir->dynamic_adjusted)
1130 {
1131 /* If called to transfer flags for a weakdef during processing
1132 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1133 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1134 dir->ref_dynamic |= ind->ref_dynamic;
1135 dir->ref_regular |= ind->ref_regular;
1136 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1137 dir->needs_plt |= ind->needs_plt;
1138 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1139 }
81848ca0 1140 else
fcfa13d2 1141 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
ebe50bae
AM
1142}
1143
142411ca
L
1144/* Return TRUE if the TLS access code sequence support transition
1145 from R_TYPE. */
1146
1147static bfd_boolean
1148elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1149 bfd_byte *contents,
1150 Elf_Internal_Shdr *symtab_hdr,
1151 struct elf_link_hash_entry **sym_hashes,
1152 unsigned int r_type,
1153 const Elf_Internal_Rela *rel,
1154 const Elf_Internal_Rela *relend)
13ae64f3 1155{
142411ca
L
1156 unsigned int val, type;
1157 unsigned long r_symndx;
1158 struct elf_link_hash_entry *h;
1159 bfd_vma offset;
1160
1161 /* Get the section contents. */
1162 if (contents == NULL)
1163 {
1164 if (elf_section_data (sec)->this_hdr.contents != NULL)
1165 contents = elf_section_data (sec)->this_hdr.contents;
1166 else
1167 {
1168 /* FIXME: How to better handle error condition? */
1169 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1170 return FALSE;
13ae64f3 1171
142411ca
L
1172 /* Cache the section contents for elf_link_input_bfd. */
1173 elf_section_data (sec)->this_hdr.contents = contents;
1174 }
1175 }
1176
1177 offset = rel->r_offset;
13ae64f3 1178 switch (r_type)
142411ca
L
1179 {
1180 case R_386_TLS_GD:
1181 case R_386_TLS_LDM:
1182 if (offset < 2 || (rel + 1) >= relend)
1183 return FALSE;
1184
1185 type = bfd_get_8 (abfd, contents + offset - 2);
1186 if (r_type == R_386_TLS_GD)
1187 {
09e8c3bf 1188 /* Check transition from GD access model. Only
142411ca
L
1189 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1190 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1191 can transit to different access model. */
1192 if ((offset + 10) > sec->size ||
1193 (type != 0x8d && type != 0x04))
1194 return FALSE;
1195
1196 val = bfd_get_8 (abfd, contents + offset - 1);
1197 if (type == 0x04)
1198 {
1199 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1200 if (offset < 3)
1201 return FALSE;
1202
1203 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1204 return FALSE;
1205
1206 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1207 return FALSE;
1208 }
1209 else
1210 {
1211 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1212 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1213 return FALSE;
1214
1215 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1216 return FALSE;
1217 }
1218 }
1219 else
1220 {
1221 /* Check transition from LD access model. Only
1222 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1223 can transit to different access model. */
1224 if (type != 0x8d || (offset + 9) > sec->size)
1225 return FALSE;
1226
1227 val = bfd_get_8 (abfd, contents + offset - 1);
1228 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1229 return FALSE;
1230 }
1231
1232 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1233 return FALSE;
1234
1235 r_symndx = ELF32_R_SYM (rel[1].r_info);
1236 if (r_symndx < symtab_hdr->sh_info)
1237 return FALSE;
1238
1239 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b
L
1240 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1241 may be versioned. */
142411ca
L
1242 return (h != NULL
1243 && h->root.root.string != NULL
1244 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1245 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
c4fb387b
L
1246 && (strncmp (h->root.root.string, "___tls_get_addr",
1247 15) == 0));
142411ca
L
1248
1249 case R_386_TLS_IE:
1250 /* Check transition from IE access model:
1251 movl foo@indntpoff(%rip), %eax
1252 movl foo@indntpoff(%rip), %reg
1253 addl foo@indntpoff(%rip), %reg
1254 */
1255
1256 if (offset < 1 || (offset + 4) > sec->size)
1257 return FALSE;
1258
1259 /* Check "movl foo@tpoff(%rip), %eax" first. */
1260 val = bfd_get_8 (abfd, contents + offset - 1);
1261 if (val == 0xa1)
1262 return TRUE;
1263
1264 if (offset < 2)
1265 return FALSE;
1266
1267 /* Check movl|addl foo@tpoff(%rip), %reg. */
1268 type = bfd_get_8 (abfd, contents + offset - 2);
1269 return ((type == 0x8b || type == 0x03)
1270 && (val & 0xc7) == 0x05);
1271
1272 case R_386_TLS_GOTIE:
1273 case R_386_TLS_IE_32:
1274 /* Check transition from {IE_32,GOTIE} access model:
1275 subl foo@{tpoff,gontoff}(%reg1), %reg2
1276 movl foo@{tpoff,gontoff}(%reg1), %reg2
1277 addl foo@{tpoff,gontoff}(%reg1), %reg2
1278 */
1279
1280 if (offset < 2 || (offset + 4) > sec->size)
1281 return FALSE;
1282
1283 val = bfd_get_8 (abfd, contents + offset - 1);
1284 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1285 return FALSE;
1286
1287 type = bfd_get_8 (abfd, contents + offset - 2);
1288 return type == 0x8b || type == 0x2b || type == 0x03;
1289
1290 case R_386_TLS_GOTDESC:
1291 /* Check transition from GDesc access model:
1292 leal x@tlsdesc(%ebx), %eax
1293
1294 Make sure it's a leal adding ebx to a 32-bit offset
1295 into any register, although it's probably almost always
1296 going to be eax. */
1297
1298 if (offset < 2 || (offset + 4) > sec->size)
1299 return FALSE;
1300
1301 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1302 return FALSE;
1303
1304 val = bfd_get_8 (abfd, contents + offset - 1);
1305 return (val & 0xc7) == 0x83;
1306
1307 case R_386_TLS_DESC_CALL:
1308 /* Check transition from GDesc access model:
1309 call *x@tlsdesc(%rax)
1310 */
1311 if (offset + 2 <= sec->size)
1312 {
1313 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM
1314 static const unsigned char call[] = { 0xff, 0x10 };
1315 return memcmp (contents + offset, call, 2) == 0;
142411ca
L
1316 }
1317
1318 return FALSE;
1319
1320 default:
1321 abort ();
1322 }
1323}
1324
1325/* Return TRUE if the TLS access transition is OK or no transition
1326 will be performed. Update R_TYPE if there is a transition. */
1327
1328static bfd_boolean
1329elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1330 asection *sec, bfd_byte *contents,
1331 Elf_Internal_Shdr *symtab_hdr,
1332 struct elf_link_hash_entry **sym_hashes,
1333 unsigned int *r_type, int tls_type,
1334 const Elf_Internal_Rela *rel,
1335 const Elf_Internal_Rela *relend,
4c544807
L
1336 struct elf_link_hash_entry *h,
1337 unsigned long r_symndx)
142411ca
L
1338{
1339 unsigned int from_type = *r_type;
1340 unsigned int to_type = from_type;
1341 bfd_boolean check = TRUE;
1342
bb1cb422
L
1343 /* Skip TLS transition for functions. */
1344 if (h != NULL
1345 && (h->type == STT_FUNC
1346 || h->type == STT_GNU_IFUNC))
1347 return TRUE;
1348
142411ca 1349 switch (from_type)
13ae64f3
JJ
1350 {
1351 case R_386_TLS_GD:
67a4f2b7
AO
1352 case R_386_TLS_GOTDESC:
1353 case R_386_TLS_DESC_CALL:
13ae64f3 1354 case R_386_TLS_IE_32:
37e55690
JJ
1355 case R_386_TLS_IE:
1356 case R_386_TLS_GOTIE:
1d85728f 1357 if (info->executable)
142411ca
L
1358 {
1359 if (h == NULL)
1360 to_type = R_386_TLS_LE_32;
1361 else if (from_type != R_386_TLS_IE
1362 && from_type != R_386_TLS_GOTIE)
1363 to_type = R_386_TLS_IE_32;
1364 }
1365
1366 /* When we are called from elf_i386_relocate_section, CONTENTS
1367 isn't NULL and there may be additional transitions based on
1368 TLS_TYPE. */
1369 if (contents != NULL)
1370 {
1371 unsigned int new_to_type = to_type;
1372
1d85728f 1373 if (info->executable
142411ca
L
1374 && h != NULL
1375 && h->dynindx == -1
1376 && (tls_type & GOT_TLS_IE))
1377 new_to_type = R_386_TLS_LE_32;
1378
1379 if (to_type == R_386_TLS_GD
1380 || to_type == R_386_TLS_GOTDESC
1381 || to_type == R_386_TLS_DESC_CALL)
1382 {
1383 if (tls_type == GOT_TLS_IE_POS)
1384 new_to_type = R_386_TLS_GOTIE;
1385 else if (tls_type & GOT_TLS_IE)
1386 new_to_type = R_386_TLS_IE_32;
1387 }
1388
1389 /* We checked the transition before when we were called from
1390 elf_i386_check_relocs. We only want to check the new
1391 transition which hasn't been checked before. */
1392 check = new_to_type != to_type && from_type == to_type;
1393 to_type = new_to_type;
1394 }
1395
1396 break;
1397
13ae64f3 1398 case R_386_TLS_LDM:
1d85728f 1399 if (info->executable)
142411ca
L
1400 to_type = R_386_TLS_LE_32;
1401 break;
1402
1403 default:
1404 return TRUE;
1405 }
1406
1407 /* Return TRUE if there is no transition. */
1408 if (from_type == to_type)
1409 return TRUE;
1410
1411 /* Check if the transition can be performed. */
1412 if (check
1413 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1414 symtab_hdr, sym_hashes,
1415 from_type, rel, relend))
1416 {
2f629d23 1417 reloc_howto_type *from, *to;
4c544807 1418 const char *name;
142411ca
L
1419
1420 from = elf_i386_rtype_to_howto (abfd, from_type);
1421 to = elf_i386_rtype_to_howto (abfd, to_type);
1422
4c544807
L
1423 if (h)
1424 name = h->root.root.string;
1425 else
1426 {
4c544807 1427 struct elf_i386_link_hash_table *htab;
4dfe6ac6 1428
4c544807 1429 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
1430 if (htab == NULL)
1431 name = "*unknown*";
1432 else
1433 {
1434 Elf_Internal_Sym *isym;
1435
1436 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1437 abfd, r_symndx);
1438 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1439 }
4c544807
L
1440 }
1441
142411ca
L
1442 (*_bfd_error_handler)
1443 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1444 "in section `%A' failed"),
4c544807 1445 abfd, sec, from->name, to->name, name,
142411ca
L
1446 (unsigned long) rel->r_offset);
1447 bfd_set_error (bfd_error_bad_value);
1448 return FALSE;
13ae64f3
JJ
1449 }
1450
142411ca
L
1451 *r_type = to_type;
1452 return TRUE;
13ae64f3
JJ
1453}
1454
c1d11331
L
1455/* Rename some of the generic section flags to better document how they
1456 are used here. */
1457#define need_convert_mov_to_lea sec_flg0
1458
252b5132 1459/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM
1460 calculate needed space in the global offset table, procedure linkage
1461 table, and dynamic reloc sections. */
252b5132 1462
b34976b6 1463static bfd_boolean
55fd94b0
AM
1464elf_i386_check_relocs (bfd *abfd,
1465 struct bfd_link_info *info,
1466 asection *sec,
1467 const Elf_Internal_Rela *relocs)
252b5132 1468{
6725bdbf 1469 struct elf_i386_link_hash_table *htab;
252b5132
RH
1470 Elf_Internal_Shdr *symtab_hdr;
1471 struct elf_link_hash_entry **sym_hashes;
252b5132
RH
1472 const Elf_Internal_Rela *rel;
1473 const Elf_Internal_Rela *rel_end;
252b5132 1474 asection *sreloc;
dd7e64d4 1475 bfd_boolean use_plt_got;
252b5132 1476
1049f94e 1477 if (info->relocatable)
b34976b6 1478 return TRUE;
252b5132 1479
0ffa91dd
NC
1480 BFD_ASSERT (is_i386_elf (abfd));
1481
6725bdbf 1482 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
1483 if (htab == NULL)
1484 return FALSE;
1485
dd7e64d4
L
1486 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1487 && (get_elf_i386_backend_data (abfd)
1488 == &elf_i386_arch_bed));
1489
0ffa91dd 1490 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1491 sym_hashes = elf_sym_hashes (abfd);
252b5132 1492
252b5132
RH
1493 sreloc = NULL;
1494
1495 rel_end = relocs + sec->reloc_count;
1496 for (rel = relocs; rel < rel_end; rel++)
1497 {
13ae64f3 1498 unsigned int r_type;
252b5132
RH
1499 unsigned long r_symndx;
1500 struct elf_link_hash_entry *h;
d5597ebc 1501 struct elf_i386_link_hash_entry *eh;
4c544807
L
1502 Elf_Internal_Sym *isym;
1503 const char *name;
06a6a421 1504 bfd_boolean size_reloc;
252b5132
RH
1505
1506 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1507 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1508
d9bc7a44 1509 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1510 {
d003868e
AM
1511 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1512 abfd,
8f615d07 1513 r_symndx);
b34976b6 1514 return FALSE;
f5f31454
L
1515 }
1516
252b5132 1517 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L
1518 {
1519 /* A local symbol. */
c2e61a4e
L
1520 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1521 abfd, r_symndx);
1522 if (isym == NULL)
1523 return FALSE;
c25bc9fc
L
1524
1525 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L
1526 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1527 {
9fff0c39 1528 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1529 if (h == NULL)
c2e61a4e 1530 return FALSE;
6bbec505 1531
c25bc9fc
L
1532 /* Fake a STT_GNU_IFUNC symbol. */
1533 h->type = STT_GNU_IFUNC;
1534 h->def_regular = 1;
1535 h->ref_regular = 1;
1536 h->forced_local = 1;
1537 h->root.type = bfd_link_hash_defined;
1538 }
1539 else
1540 h = NULL;
1541 }
252b5132 1542 else
71cb9464 1543 {
4c544807 1544 isym = NULL;
71cb9464
L
1545 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1546 while (h->root.type == bfd_link_hash_indirect
1547 || h->root.type == bfd_link_hash_warning)
1548 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1549 }
cbe950e9 1550
d5597ebc 1551 eh = (struct elf_i386_link_hash_entry *) h;
c25bc9fc
L
1552 if (h != NULL)
1553 {
cbe950e9
L
1554 /* Create the ifunc sections for static executables. If we
1555 never see an indirect function symbol nor we are building
1556 a static executable, those sections will be empty and
1557 won't appear in output. */
1558 switch (r_type)
1559 {
1560 default:
1561 break;
1562
d5597ebc
L
1563 case R_386_GOTOFF:
1564 eh->gotoff_ref = 1;
cbe950e9
L
1565 case R_386_32:
1566 case R_386_PC32:
1567 case R_386_PLT32:
1568 case R_386_GOT32:
9d4057ee
AM
1569 if (htab->elf.dynobj == NULL)
1570 htab->elf.dynobj = abfd;
1571 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1572 return FALSE;
cbe950e9
L
1573 break;
1574 }
1575
ad1e85de
L
1576 /* It is referenced by a non-shared object. */
1577 h->ref_regular = 1;
61315175 1578 h->root.non_ir_ref = 1;
71cb9464 1579 }
252b5132 1580
142411ca
L
1581 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1582 symtab_hdr, sym_hashes,
1583 &r_type, GOT_UNKNOWN,
23209a78 1584 rel, rel_end, h, r_symndx))
c2e61a4e 1585 return FALSE;
13ae64f3
JJ
1586
1587 switch (r_type)
252b5132 1588 {
37e55690
JJ
1589 case R_386_TLS_LDM:
1590 htab->tls_ldm_got.refcount += 1;
1591 goto create_got;
1592
1593 case R_386_PLT32:
1594 /* This symbol requires a procedure linkage table entry. We
1595 actually build the entry in adjust_dynamic_symbol,
1596 because this might be a case of linking PIC code which is
1597 never referenced by a dynamic object, in which case we
1598 don't need to generate a procedure linkage table entry
1599 after all. */
1600
1601 /* If this is a local symbol, we resolve it directly without
1602 creating a procedure linkage table entry. */
1603 if (h == NULL)
1604 continue;
1605
f5385ebf 1606 h->needs_plt = 1;
37e55690
JJ
1607 h->plt.refcount += 1;
1608 break;
1609
6a3e1bae 1610 case R_386_SIZE32:
06a6a421 1611 size_reloc = TRUE;
6a3e1bae
L
1612 goto do_size;
1613
13ae64f3 1614 case R_386_TLS_IE_32:
37e55690
JJ
1615 case R_386_TLS_IE:
1616 case R_386_TLS_GOTIE:
1d85728f 1617 if (!info->executable)
13ae64f3 1618 info->flags |= DF_STATIC_TLS;
37e55690
JJ
1619 /* Fall through */
1620
252b5132 1621 case R_386_GOT32:
13ae64f3 1622 case R_386_TLS_GD:
67a4f2b7
AO
1623 case R_386_TLS_GOTDESC:
1624 case R_386_TLS_DESC_CALL:
252b5132 1625 /* This symbol requires a global offset table entry. */
13ae64f3
JJ
1626 {
1627 int tls_type, old_tls_type;
1628
1629 switch (r_type)
1630 {
1631 default:
1632 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1633 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO
1634 case R_386_TLS_GOTDESC:
1635 case R_386_TLS_DESC_CALL:
1636 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ
1637 case R_386_TLS_IE_32:
1638 if (ELF32_R_TYPE (rel->r_info) == r_type)
1639 tls_type = GOT_TLS_IE_NEG;
1640 else
ebcfb3c0
JJ
1641 /* If this is a GD->IE transition, we may use either of
1642 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ
1643 tls_type = GOT_TLS_IE;
1644 break;
1645 case R_386_TLS_IE:
1646 case R_386_TLS_GOTIE:
1647 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ
1648 }
1649
1650 if (h != NULL)
1651 {
1652 h->got.refcount += 1;
1653 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1654 }
1655 else
1656 {
1657 bfd_signed_vma *local_got_refcounts;
1658
1659 /* This is a global offset table entry for a local symbol. */
1660 local_got_refcounts = elf_local_got_refcounts (abfd);
1661 if (local_got_refcounts == NULL)
1662 {
1663 bfd_size_type size;
1664
1665 size = symtab_hdr->sh_info;
67a4f2b7
AO
1666 size *= (sizeof (bfd_signed_vma)
1667 + sizeof (bfd_vma) + sizeof(char));
a50b1753
NC
1668 local_got_refcounts = (bfd_signed_vma *)
1669 bfd_zalloc (abfd, size);
13ae64f3 1670 if (local_got_refcounts == NULL)
c2e61a4e 1671 return FALSE;
13ae64f3 1672 elf_local_got_refcounts (abfd) = local_got_refcounts;
67a4f2b7
AO
1673 elf_i386_local_tlsdesc_gotent (abfd)
1674 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
13ae64f3 1675 elf_i386_local_got_tls_type (abfd)
67a4f2b7 1676 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ
1677 }
1678 local_got_refcounts[r_symndx] += 1;
1679 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1680 }
1681
37e55690
JJ
1682 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1683 tls_type |= old_tls_type;
13ae64f3
JJ
1684 /* If a TLS symbol is accessed using IE at least once,
1685 there is no point to use dynamic model for it. */
ebcfb3c0 1686 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1687 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1688 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1689 {
67a4f2b7 1690 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1691 tls_type = old_tls_type;
67a4f2b7
AO
1692 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1693 && GOT_TLS_GD_ANY_P (tls_type))
1694 tls_type |= old_tls_type;
13ae64f3
JJ
1695 else
1696 {
09a24cbf 1697 if (h)
4c544807
L
1698 name = h->root.root.string;
1699 else
1700 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1701 NULL);
13ae64f3 1702 (*_bfd_error_handler)
d003868e 1703 (_("%B: `%s' accessed both as normal and "
55fd94b0 1704 "thread local symbol"),
4c544807 1705 abfd, name);
68c4a57e 1706 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1707 return FALSE;
13ae64f3
JJ
1708 }
1709 }
1710
1711 if (old_tls_type != tls_type)
1712 {
1713 if (h != NULL)
1714 elf_i386_hash_entry (h)->tls_type = tls_type;
1715 else
1716 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1717 }
1718 }
0ac8d2ca
AM
1719 /* Fall through */
1720
1721 case R_386_GOTOFF:
1722 case R_386_GOTPC:
13ae64f3 1723 create_got:
6de2ae4a 1724 if (htab->elf.sgot == NULL)
0ac8d2ca
AM
1725 {
1726 if (htab->elf.dynobj == NULL)
1727 htab->elf.dynobj = abfd;
6de2ae4a 1728 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
c2e61a4e 1729 return FALSE;
0ac8d2ca 1730 }
37e55690
JJ
1731 if (r_type != R_386_TLS_IE)
1732 break;
1733 /* Fall through */
252b5132 1734
37e55690
JJ
1735 case R_386_TLS_LE_32:
1736 case R_386_TLS_LE:
1d85728f 1737 if (info->executable)
37e55690 1738 break;
bffbf940 1739 info->flags |= DF_STATIC_TLS;
b34976b6 1740 /* Fall through */
252b5132
RH
1741
1742 case R_386_32:
1743 case R_386_PC32:
710ab287 1744 if (h != NULL && info->executable)
6725bdbf 1745 {
12d0ee4a 1746 /* If this reloc is in a read-only section, we might
ebe50bae
AM
1747 need a copy reloc. We can't check reliably at this
1748 stage whether the section is read-only, as input
1749 sections have not yet been mapped to output sections.
1750 Tentatively set the flag for now, and correct in
1751 adjust_dynamic_symbol. */
f5385ebf 1752 h->non_got_ref = 1;
12d0ee4a
AM
1753
1754 /* We may need a .plt entry if the function this reloc
1755 refers to is in a shared lib. */
51b64d56 1756 h->plt.refcount += 1;
c6585bbb 1757 if (r_type != R_386_PC32)
f5385ebf 1758 h->pointer_equality_needed = 1;
6725bdbf 1759 }
7843f00e 1760
06a6a421 1761 size_reloc = FALSE;
6a3e1bae 1762do_size:
252b5132 1763 /* If we are creating a shared library, and this is a reloc
f69da49f
AM
1764 against a global symbol, or a non PC relative reloc
1765 against a local symbol, then we need to copy the reloc
1766 into the shared library. However, if we are linking with
1767 -Bsymbolic, we do not need to copy a reloc against a
1768 global symbol which is defined in an object we are
1769 including in the link (i.e., DEF_REGULAR is set). At
1770 this point we have not seen all the input files, so it is
1771 possible that DEF_REGULAR is not set now but will be set
1f655a09
L
1772 later (it is never cleared). In case of a weak definition,
1773 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1774 a shared library. We account for that possibility below by
1f655a09
L
1775 storing information in the relocs_copied field of the hash
1776 table entry. A similar situation occurs when creating
1777 shared libraries and symbol visibility changes render the
12d0ee4a 1778 symbol local.
56882138 1779
12d0ee4a
AM
1780 If on the other hand, we are creating an executable, we
1781 may need to keep relocations for symbols satisfied by a
1782 dynamic library if we manage to avoid copy relocs for the
1783 symbol. */
1784 if ((info->shared
1785 && (sec->flags & SEC_ALLOC) != 0
13ae64f3 1786 && (r_type != R_386_PC32
12d0ee4a 1787 || (h != NULL
55255dae 1788 && (! SYMBOLIC_BIND (info, h)
12d0ee4a 1789 || h->root.type == bfd_link_hash_defweak
f5385ebf 1790 || !h->def_regular))))
a23b6845
AM
1791 || (ELIMINATE_COPY_RELOCS
1792 && !info->shared
12d0ee4a
AM
1793 && (sec->flags & SEC_ALLOC) != 0
1794 && h != NULL
12d0ee4a 1795 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1796 || !h->def_regular)))
252b5132 1797 {
e03a8ed8
L
1798 struct elf_dyn_relocs *p;
1799 struct elf_dyn_relocs **head;
ec338859 1800
12d0ee4a
AM
1801 /* We must copy these reloc types into the output file.
1802 Create a reloc section in dynobj and make room for
1803 this reloc. */
252b5132
RH
1804 if (sreloc == NULL)
1805 {
0ac8d2ca
AM
1806 if (htab->elf.dynobj == NULL)
1807 htab->elf.dynobj = abfd;
1808
83bac4b0
NC
1809 sreloc = _bfd_elf_make_dynamic_reloc_section
1810 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1811
252b5132 1812 if (sreloc == NULL)
c2e61a4e 1813 return FALSE;
252b5132
RH
1814 }
1815
0c715baa
AM
1816 /* If this is a global symbol, we count the number of
1817 relocations we need for this symbol. */
1818 if (h != NULL)
252b5132 1819 {
d5597ebc 1820 head = &eh->dyn_relocs;
0c715baa
AM
1821 }
1822 else
1823 {
ec338859
AM
1824 /* Track dynamic relocs needed for local syms too.
1825 We really need local syms available to do this
1826 easily. Oh well. */
87d72d41 1827 void **vpp;
ec338859 1828 asection *s;
87d72d41
AM
1829
1830 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1831 abfd, r_symndx);
1832 if (isym == NULL)
1833 return FALSE;
1834
1835 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1836 if (s == NULL)
87d72d41 1837 s = sec;
ec338859 1838
e81d3500 1839 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1840 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM
1841 }
1842
1843 p = *head;
1844 if (p == NULL || p->sec != sec)
1845 {
1846 bfd_size_type amt = sizeof *p;
a50b1753
NC
1847 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1848 amt);
ec338859 1849 if (p == NULL)
c2e61a4e 1850 return FALSE;
ec338859
AM
1851 p->next = *head;
1852 *head = p;
1853 p->sec = sec;
1854 p->count = 0;
1855 p->pc_count = 0;
252b5132 1856 }
ec338859
AM
1857
1858 p->count += 1;
06a6a421
L
1859 /* Count size relocation as PC-relative relocation. */
1860 if (r_type == R_386_PC32 || size_reloc)
ec338859 1861 p->pc_count += 1;
252b5132 1862 }
252b5132
RH
1863 break;
1864
1865 /* This relocation describes the C++ object vtable hierarchy.
1866 Reconstruct it for later use during GC. */
1867 case R_386_GNU_VTINHERIT:
d17e0c6e 1868 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 1869 return FALSE;
252b5132
RH
1870 break;
1871
1872 /* This relocation describes which C++ vtable entries are actually
1873 used. Record for later use during GC. */
1874 case R_386_GNU_VTENTRY:
c6aa130f
MS
1875 BFD_ASSERT (h != NULL);
1876 if (h != NULL
1877 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c2e61a4e 1878 return FALSE;
252b5132
RH
1879 break;
1880
1881 default:
1882 break;
1883 }
dd7e64d4
L
1884
1885 if (use_plt_got
1886 && h != NULL
1887 && h->plt.refcount > 0
8ded2ddc
L
1888 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
1889 || h->got.refcount > 0)
dd7e64d4
L
1890 && htab->plt_got == NULL)
1891 {
1892 /* Create the GOT procedure linkage table. */
1893 unsigned int plt_got_align;
1894 const struct elf_backend_data *bed;
1895
1896 bed = get_elf_backend_data (info->output_bfd);
1897 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1898 && (sizeof (elf_i386_got_plt_entry)
1899 == sizeof (elf_i386_pic_got_plt_entry)));
1900 plt_got_align = 3;
1901
1902 if (htab->elf.dynobj == NULL)
1903 htab->elf.dynobj = abfd;
1904 htab->plt_got
1905 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1906 ".plt.got",
1907 (bed->dynamic_sec_flags
1908 | SEC_ALLOC
1909 | SEC_CODE
1910 | SEC_LOAD
1911 | SEC_READONLY));
1912 if (htab->plt_got == NULL
1913 || !bfd_set_section_alignment (htab->elf.dynobj,
1914 htab->plt_got,
1915 plt_got_align))
1916 return FALSE;
1917 }
c1d11331
L
1918
1919 if (r_type == R_386_GOT32
1920 && (h == NULL || h->type != STT_GNU_IFUNC))
1921 sec->need_convert_mov_to_lea = 1;
252b5132
RH
1922 }
1923
b34976b6 1924 return TRUE;
252b5132
RH
1925}
1926
1927/* Return the section that should be marked against GC for a given
1928 relocation. */
1929
1930static asection *
55fd94b0 1931elf_i386_gc_mark_hook (asection *sec,
07adf181 1932 struct bfd_link_info *info,
55fd94b0
AM
1933 Elf_Internal_Rela *rel,
1934 struct elf_link_hash_entry *h,
1935 Elf_Internal_Sym *sym)
252b5132
RH
1936{
1937 if (h != NULL)
07adf181
AM
1938 switch (ELF32_R_TYPE (rel->r_info))
1939 {
1940 case R_386_GNU_VTINHERIT:
1941 case R_386_GNU_VTENTRY:
1942 return NULL;
1943 }
1944
1945 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132
RH
1946}
1947
1948/* Update the got entry reference counts for the section being removed. */
1949
b34976b6 1950static bfd_boolean
55fd94b0
AM
1951elf_i386_gc_sweep_hook (bfd *abfd,
1952 struct bfd_link_info *info,
1953 asection *sec,
1954 const Elf_Internal_Rela *relocs)
252b5132 1955{
4dfe6ac6 1956 struct elf_i386_link_hash_table *htab;
dd5724d5
AM
1957 Elf_Internal_Shdr *symtab_hdr;
1958 struct elf_link_hash_entry **sym_hashes;
1959 bfd_signed_vma *local_got_refcounts;
1960 const Elf_Internal_Rela *rel, *relend;
dd5724d5 1961
7dda2462
TG
1962 if (info->relocatable)
1963 return TRUE;
1964
4dfe6ac6
NC
1965 htab = elf_i386_hash_table (info);
1966 if (htab == NULL)
1967 return FALSE;
1968
ec338859 1969 elf_section_data (sec)->local_dynrel = NULL;
dd5724d5 1970
0ffa91dd 1971 symtab_hdr = &elf_symtab_hdr (abfd);
6725bdbf
AM
1972 sym_hashes = elf_sym_hashes (abfd);
1973 local_got_refcounts = elf_local_got_refcounts (abfd);
dd5724d5
AM
1974
1975 relend = relocs + sec->reloc_count;
1976 for (rel = relocs; rel < relend; rel++)
26e41594
AM
1977 {
1978 unsigned long r_symndx;
1979 unsigned int r_type;
1980 struct elf_link_hash_entry *h = NULL;
37e55690 1981
26e41594
AM
1982 r_symndx = ELF32_R_SYM (rel->r_info);
1983 if (r_symndx >= symtab_hdr->sh_info)
1984 {
26e41594 1985 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM
1986 while (h->root.type == bfd_link_hash_indirect
1987 || h->root.type == bfd_link_hash_warning)
1988 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1989 }
bb1cb422
L
1990 else
1991 {
1992 /* A local symbol. */
1993 Elf_Internal_Sym *isym;
1994
1995 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1996 abfd, r_symndx);
1997
1998 /* Check relocation against local STT_GNU_IFUNC symbol. */
1999 if (isym != NULL
2000 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2001 {
2002 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
2003 if (h == NULL)
2004 abort ();
2005 }
2006 }
0c715baa 2007
3db2e7dd
L
2008 if (h)
2009 {
2010 struct elf_i386_link_hash_entry *eh;
2011 struct elf_dyn_relocs **pp;
2012 struct elf_dyn_relocs *p;
2013
2014 eh = (struct elf_i386_link_hash_entry *) h;
2015 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2016 if (p->sec == sec)
2017 {
2018 /* Everything must go for SEC. */
2019 *pp = p->next;
2020 break;
2021 }
2022 }
2023
26e41594 2024 r_type = ELF32_R_TYPE (rel->r_info);
142411ca
L
2025 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
2026 symtab_hdr, sym_hashes,
2027 &r_type, GOT_UNKNOWN,
23209a78 2028 rel, relend, h, r_symndx))
142411ca
L
2029 return FALSE;
2030
26e41594
AM
2031 switch (r_type)
2032 {
2033 case R_386_TLS_LDM:
4dfe6ac6
NC
2034 if (htab->tls_ldm_got.refcount > 0)
2035 htab->tls_ldm_got.refcount -= 1;
26e41594 2036 break;
0c715baa 2037
26e41594 2038 case R_386_TLS_GD:
67a4f2b7
AO
2039 case R_386_TLS_GOTDESC:
2040 case R_386_TLS_DESC_CALL:
26e41594
AM
2041 case R_386_TLS_IE_32:
2042 case R_386_TLS_IE:
2043 case R_386_TLS_GOTIE:
2044 case R_386_GOT32:
2045 if (h != NULL)
2046 {
2047 if (h->got.refcount > 0)
2048 h->got.refcount -= 1;
bb1cb422
L
2049 if (h->type == STT_GNU_IFUNC)
2050 {
2051 if (h->plt.refcount > 0)
2052 h->plt.refcount -= 1;
2053 }
26e41594
AM
2054 }
2055 else if (local_got_refcounts != NULL)
2056 {
2057 if (local_got_refcounts[r_symndx] > 0)
2058 local_got_refcounts[r_symndx] -= 1;
2059 }
2060 break;
0c715baa 2061
26e41594
AM
2062 case R_386_32:
2063 case R_386_PC32:
1788fc08 2064 case R_386_SIZE32:
3db2e7dd
L
2065 if (info->shared
2066 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM
2067 break;
2068 /* Fall through */
6725bdbf 2069
26e41594
AM
2070 case R_386_PLT32:
2071 if (h != NULL)
2072 {
2073 if (h->plt.refcount > 0)
2074 h->plt.refcount -= 1;
2075 }
2076 break;
dd5724d5 2077
bb1cb422
L
2078 case R_386_GOTOFF:
2079 if (h != NULL && h->type == STT_GNU_IFUNC)
2080 {
2081 if (h->got.refcount > 0)
2082 h->got.refcount -= 1;
2083 if (h->plt.refcount > 0)
2084 h->plt.refcount -= 1;
2085 }
2086 break;
2087
26e41594
AM
2088 default:
2089 break;
2090 }
2091 }
252b5132 2092
b34976b6 2093 return TRUE;
252b5132
RH
2094}
2095
2096/* Adjust a symbol defined by a dynamic object and referenced by a
2097 regular object. The current definition is in some section of the
2098 dynamic object, but we're not including those sections. We have to
2099 change the definition to something the rest of the link can
2100 understand. */
2101
b34976b6 2102static bfd_boolean
55fd94b0
AM
2103elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2104 struct elf_link_hash_entry *h)
252b5132 2105{
6725bdbf 2106 struct elf_i386_link_hash_table *htab;
252b5132 2107 asection *s;
5ca5bb35
L
2108 struct elf_i386_link_hash_entry *eh;
2109 struct elf_dyn_relocs *p;
252b5132 2110
cbe950e9
L
2111 /* STT_GNU_IFUNC symbol must go through PLT. */
2112 if (h->type == STT_GNU_IFUNC)
2113 {
73bcf233
L
2114 /* All local STT_GNU_IFUNC references must be treate as local
2115 calls via local PLT. */
5ca5bb35
L
2116 if (h->ref_regular
2117 && SYMBOL_CALLS_LOCAL (info, h))
2118 {
73bcf233 2119 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L
2120 struct elf_dyn_relocs **pp;
2121
2122 eh = (struct elf_i386_link_hash_entry *) h;
2123 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2124 {
2125 pc_count += p->pc_count;
2126 p->count -= p->pc_count;
2127 p->pc_count = 0;
73bcf233 2128 count += p->count;
5ca5bb35
L
2129 if (p->count == 0)
2130 *pp = p->next;
2131 else
2132 pp = &p->next;
2133 }
2134
73bcf233 2135 if (pc_count || count)
5ca5bb35
L
2136 {
2137 h->needs_plt = 1;
5ca5bb35 2138 h->non_got_ref = 1;
a5479e5f
L
2139 if (h->plt.refcount <= 0)
2140 h->plt.refcount = 1;
2141 else
2142 h->plt.refcount += 1;
5ca5bb35
L
2143 }
2144 }
2145
cbe950e9
L
2146 if (h->plt.refcount <= 0)
2147 {
2148 h->plt.offset = (bfd_vma) -1;
2149 h->needs_plt = 0;
2150 }
2151 return TRUE;
2152 }
2153
252b5132
RH
2154 /* If this is a function, put it in the procedure linkage table. We
2155 will fill in the contents of the procedure linkage table later,
2156 when we know the address of the .got section. */
2157 if (h->type == STT_FUNC
f5385ebf 2158 || h->needs_plt)
252b5132 2159 {
6725bdbf 2160 if (h->plt.refcount <= 0
9c7a29a3
AM
2161 || SYMBOL_CALLS_LOCAL (info, h)
2162 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2163 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH
2164 {
2165 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM
2166 file, but the symbol was never referred to by a dynamic
2167 object, or if all references were garbage collected. In
2168 such a case, we don't actually need to build a procedure
2169 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 2170 h->plt.offset = (bfd_vma) -1;
f5385ebf 2171 h->needs_plt = 0;
252b5132
RH
2172 }
2173
b34976b6 2174 return TRUE;
252b5132 2175 }
6725bdbf
AM
2176 else
2177 /* It's possible that we incorrectly decided a .plt reloc was
2178 needed for an R_386_PC32 reloc to a non-function sym in
2179 check_relocs. We can't decide accurately between function and
2180 non-function syms in check-relocs; Objects loaded later in
2181 the link may change h->type. So fix it now. */
bbd7ec4a 2182 h->plt.offset = (bfd_vma) -1;
252b5132
RH
2183
2184 /* If this is a weak symbol, and there is a real definition, the
2185 processor independent code will have arranged for us to see the
2186 real definition first, and we can just use the same value. */
f6e332e6 2187 if (h->u.weakdef != NULL)
252b5132 2188 {
f6e332e6
AM
2189 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2190 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2191 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2192 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a23b6845 2193 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 2194 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2195 return TRUE;
252b5132
RH
2196 }
2197
2198 /* This is a reference to a symbol defined by a dynamic object which
2199 is not a function. */
2200
2201 /* If we are creating a shared library, we must presume that the
2202 only references to the symbol are via the global offset table.
2203 For such cases we need not do anything here; the relocations will
2204 be handled correctly by relocate_section. */
d5597ebc 2205 if (!info->executable)
b34976b6 2206 return TRUE;
252b5132 2207
7843f00e 2208 /* If there are no references to this symbol that do not use the
d5597ebc
L
2209 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2210 reloc. */
2211 eh = (struct elf_i386_link_hash_entry *) h;
2212 if (!h->non_got_ref && !eh->gotoff_ref)
b34976b6 2213 return TRUE;
7843f00e 2214
8bd621d8
AM
2215 /* If -z nocopyreloc was given, we won't generate them either. */
2216 if (info->nocopyreloc)
2217 {
f5385ebf 2218 h->non_got_ref = 0;
b34976b6 2219 return TRUE;
8bd621d8
AM
2220 }
2221
643796e3 2222 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
2223 if (htab == NULL)
2224 return FALSE;
643796e3 2225
d5597ebc
L
2226 /* If there aren't any dynamic relocs in read-only sections nor
2227 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2228 avoid the copy reloc. This doesn't work on VxWorks, where we can
2229 not have dynamic relocations (other than copy and jump slot
2230 relocations) in an executable. */
23209a78 2231 if (ELIMINATE_COPY_RELOCS
d5597ebc 2232 && !eh->gotoff_ref
23209a78 2233 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
ebe50bae 2234 {
a23b6845
AM
2235 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2236 {
2237 s = p->sec->output_section;
2238 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2239 break;
2240 }
2241
a23b6845
AM
2242 if (p == NULL)
2243 {
f5385ebf 2244 h->non_got_ref = 0;
a23b6845
AM
2245 return TRUE;
2246 }
ebe50bae
AM
2247 }
2248
252b5132
RH
2249 /* We must allocate the symbol in our .dynbss section, which will
2250 become part of the .bss section of the executable. There will be
2251 an entry for this symbol in the .dynsym section. The dynamic
2252 object will contain position independent code, so all references
2253 from the dynamic object to this symbol will go through the global
2254 offset table. The dynamic linker will use the .dynsym entry to
2255 determine the address it must put in the global offset table, so
2256 both the dynamic object and the regular object will refer to the
2257 same memory location for the variable. */
2258
252b5132
RH
2259 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2260 copy the initial value out of the dynamic object and into the
0ac8d2ca 2261 runtime process image. */
1d7e9d18 2262 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
252b5132 2263 {
eea6121a 2264 htab->srelbss->size += sizeof (Elf32_External_Rel);
f5385ebf 2265 h->needs_copy = 1;
252b5132
RH
2266 }
2267
0ac8d2ca 2268 s = htab->sdynbss;
252b5132 2269
6cabe1ea 2270 return _bfd_elf_adjust_dynamic_copy (info, h, s);
252b5132
RH
2271}
2272
6725bdbf 2273/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 2274 dynamic relocs. */
6725bdbf 2275
b34976b6 2276static bfd_boolean
eb4ff4d6 2277elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM
2278{
2279 struct bfd_link_info *info;
2280 struct elf_i386_link_hash_table *htab;
5a15f56f 2281 struct elf_i386_link_hash_entry *eh;
e03a8ed8 2282 struct elf_dyn_relocs *p;
25e762b9 2283 unsigned plt_entry_size;
6725bdbf 2284
e92d460e 2285 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2286 return TRUE;
6725bdbf 2287
cbe950e9 2288 eh = (struct elf_i386_link_hash_entry *) h;
e92d460e 2289
6725bdbf
AM
2290 info = (struct bfd_link_info *) inf;
2291 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
2292 if (htab == NULL)
2293 return FALSE;
6725bdbf 2294
25e762b9
RM
2295 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2296
dd7e64d4
L
2297 /* We can't use the GOT PLT if pointer equality is needed since
2298 finish_dynamic_symbol won't clear symbol value and the dynamic
2299 linker won't update the GOT slot. We will get into an infinite
2300 loop at run-time. */
2301 if (htab->plt_got != NULL
2302 && h->type != STT_GNU_IFUNC
2303 && !h->pointer_equality_needed
2304 && h->plt.refcount > 0
2305 && h->got.refcount > 0)
2306 {
2307 /* Don't use the regular PLT if there are both GOT and GOTPLT
2308 reloctions. */
2309 h->plt.offset = (bfd_vma) -1;
2310
2311 /* Use the GOT PLT. */
2312 eh->plt_got.refcount = 1;
2313 }
2314
cbe950e9
L
2315 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2316 here if it is defined and referenced in a non-shared object. */
2317 if (h->type == STT_GNU_IFUNC
2318 && h->def_regular)
25e762b9 2319 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
7b70956d
WN
2320 plt_entry_size,
2321 plt_entry_size, 4);
cbe950e9 2322 else if (htab->elf.dynamic_sections_created
dd7e64d4 2323 && (h->plt.refcount > 0 || eh->plt_got.refcount > 0))
6725bdbf 2324 {
25070364
L
2325 bfd_boolean use_plt_got;
2326
8ded2ddc 2327 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
25070364
L
2328 {
2329 /* Don't use the regular PLT for DF_BIND_NOW. */
2330 h->plt.offset = (bfd_vma) -1;
2331
2332 /* Use the GOT PLT. */
2333 h->got.refcount = 1;
2334 eh->plt_got.refcount = 1;
2335 }
2336
2337 use_plt_got = eh->plt_got.refcount > 0;
dd7e64d4 2338
5a15f56f
AM
2339 /* Make sure this symbol is output as a dynamic symbol.
2340 Undefined weak syms won't yet be marked as dynamic. */
2341 if (h->dynindx == -1
f5385ebf 2342 && !h->forced_local)
5a15f56f 2343 {
c152c796 2344 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2345 return FALSE;
5a15f56f
AM
2346 }
2347
4e795f50
AM
2348 if (info->shared
2349 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 2350 {
6de2ae4a 2351 asection *s = htab->elf.splt;
dd7e64d4 2352 asection *got_s = htab->plt_got;
6725bdbf 2353
7c1e8d3e
L
2354 /* If this is the first .plt entry, make room for the special
2355 first entry. The .plt section is used by prelink to undo
2356 prelinking for dynamic relocations. */
2357 if (s->size == 0)
2358 s->size = plt_entry_size;
2359
dd7e64d4
L
2360 if (use_plt_got)
2361 eh->plt_got.offset = got_s->size;
2362 else
7c1e8d3e 2363 h->plt.offset = s->size;
6725bdbf 2364
ced53ee5
AM
2365 /* If this symbol is not defined in a regular file, and we are
2366 not generating a shared library, then set the symbol to this
2367 location in the .plt. This is required to make function
2368 pointers compare as equal between the normal executable and
2369 the shared library. */
2370 if (! info->shared
f5385ebf 2371 && !h->def_regular)
ced53ee5 2372 {
dd7e64d4
L
2373 if (use_plt_got)
2374 {
2375 /* We need to make a call to the entry of the GOT PLT
2376 instead of regular PLT entry. */
2377 h->root.u.def.section = got_s;
2378 h->root.u.def.value = eh->plt_got.offset;
2379 }
2380 else
2381 {
2382 h->root.u.def.section = s;
2383 h->root.u.def.value = h->plt.offset;
2384 }
ced53ee5 2385 }
6725bdbf 2386
ced53ee5 2387 /* Make room for this entry. */
dd7e64d4
L
2388 if (use_plt_got)
2389 got_s->size += sizeof (elf_i386_got_plt_entry);
2390 else
2391 {
2392 s->size += plt_entry_size;
6725bdbf 2393
dd7e64d4
L
2394 /* We also need to make an entry in the .got.plt section,
2395 which will be placed in the .got section by the linker
2396 script. */
2397 htab->elf.sgotplt->size += 4;
6725bdbf 2398
dd7e64d4
L
2399 /* We also need to make an entry in the .rel.plt section. */
2400 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2401 htab->elf.srelplt->reloc_count++;
2402 }
eac338cf 2403
23209a78
RM
2404 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2405 && !info->shared)
eac338cf
PB
2406 {
2407 /* VxWorks has a second set of relocations for each PLT entry
2408 in executables. They go in a separate relocation section,
2409 which is processed by the kernel loader. */
2410
2411 /* There are two relocations for the initial PLT entry: an
2412 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2413 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2414
25e762b9 2415 if (h->plt.offset == plt_entry_size)
eac338cf
PB
2416 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2417
2418 /* There are two extra relocations for each subsequent PLT entry:
2419 an R_386_32 relocation for the GOT entry, and an R_386_32
2420 relocation for the PLT entry. */
2421
2422 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2423 }
6725bdbf 2424 }
ced53ee5
AM
2425 else
2426 {
51b64d56 2427 h->plt.offset = (bfd_vma) -1;
f5385ebf 2428 h->needs_plt = 0;
ced53ee5 2429 }
6725bdbf
AM
2430 }
2431 else
2432 {
51b64d56 2433 h->plt.offset = (bfd_vma) -1;
f5385ebf 2434 h->needs_plt = 0;
6725bdbf
AM
2435 }
2436
67a4f2b7
AO
2437 eh->tlsdesc_got = (bfd_vma) -1;
2438
37e55690 2439 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ
2440 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2441 if (h->got.refcount > 0
1d85728f 2442 && info->executable
13ae64f3 2443 && h->dynindx == -1
37e55690 2444 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
cedb70c5 2445 h->got.offset = (bfd_vma) -1;
13ae64f3 2446 else if (h->got.refcount > 0)
6725bdbf 2447 {
0ac8d2ca 2448 asection *s;
b34976b6 2449 bfd_boolean dyn;
13ae64f3 2450 int tls_type = elf_i386_hash_entry(h)->tls_type;
6725bdbf 2451
5a15f56f
AM
2452 /* Make sure this symbol is output as a dynamic symbol.
2453 Undefined weak syms won't yet be marked as dynamic. */
2454 if (h->dynindx == -1
f5385ebf 2455 && !h->forced_local)
5a15f56f 2456 {
c152c796 2457 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2458 return FALSE;
5a15f56f
AM
2459 }
2460
6de2ae4a 2461 s = htab->elf.sgot;
67a4f2b7
AO
2462 if (GOT_TLS_GDESC_P (tls_type))
2463 {
6de2ae4a 2464 eh->tlsdesc_got = htab->elf.sgotplt->size
67a4f2b7 2465 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2466 htab->elf.sgotplt->size += 8;
67a4f2b7
AO
2467 h->got.offset = (bfd_vma) -2;
2468 }
2469 if (! GOT_TLS_GDESC_P (tls_type)
2470 || GOT_TLS_GD_P (tls_type))
2471 {
2472 h->got.offset = s->size;
2473 s->size += 4;
2474 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2475 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2476 s->size += 4;
2477 }
ebe50bae 2478 dyn = htab->elf.dynamic_sections_created;
13ae64f3 2479 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ
2480 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2481 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2482 need two), R_386_TLS_GD needs one if local symbol and two if
2483 global. */
2484 if (tls_type == GOT_TLS_IE_BOTH)
6de2ae4a 2485 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2486 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 2487 || (tls_type & GOT_TLS_IE))
6de2ae4a 2488 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2489 else if (GOT_TLS_GD_P (tls_type))
6de2ae4a 2490 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO
2491 else if (! GOT_TLS_GDESC_P (tls_type)
2492 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2493 || h->root.type != bfd_link_hash_undefweak)
ef5aade5
L
2494 && (info->shared
2495 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6de2ae4a 2496 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2497 if (GOT_TLS_GDESC_P (tls_type))
6de2ae4a 2498 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM
2499 }
2500 else
51b64d56 2501 h->got.offset = (bfd_vma) -1;
6725bdbf 2502
5a15f56f 2503 if (eh->dyn_relocs == NULL)
b34976b6 2504 return TRUE;
5a15f56f 2505
0c715baa
AM
2506 /* In the shared -Bsymbolic case, discard space allocated for
2507 dynamic pc-relative relocs against symbols which turn out to be
2508 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM
2509 space for pc-relative relocs that have become local due to symbol
2510 visibility changes. */
0c715baa
AM
2511
2512 if (info->shared)
5a15f56f 2513 {
09695f56
AM
2514 /* The only reloc that uses pc_count is R_386_PC32, which will
2515 appear on a call or on something like ".long foo - .". We
2516 want calls to protected symbols to resolve directly to the
2517 function rather than going via the plt. If people want
2518 function pointer comparisons to work as expected then they
2519 should avoid writing assembly like ".long foo - .". */
2520 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 2521 {
e03a8ed8 2522 struct elf_dyn_relocs **pp;
0c715baa
AM
2523
2524 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2525 {
c3ce498c
L
2526 p->count -= p->pc_count;
2527 p->pc_count = 0;
0c715baa
AM
2528 if (p->count == 0)
2529 *pp = p->next;
2530 else
2531 pp = &p->next;
2532 }
5a15f56f 2533 }
4e795f50 2534
23209a78 2535 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
3348747a 2536 {
e03a8ed8 2537 struct elf_dyn_relocs **pp;
3348747a
NS
2538 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2539 {
2540 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2541 *pp = p->next;
2542 else
2543 pp = &p->next;
2544 }
2545 }
2546
4e795f50 2547 /* Also discard relocs on undefined weak syms with non-default
c353e543 2548 visibility. */
22d606e9 2549 if (eh->dyn_relocs != NULL
c353e543 2550 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM
2551 {
2552 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2553 eh->dyn_relocs = NULL;
2554
2555 /* Make sure undefined weak symbols are output as a dynamic
2556 symbol in PIEs. */
2557 else if (h->dynindx == -1
2558 && !h->forced_local)
2559 {
2560 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2561 return FALSE;
2562 }
2563 }
0c715baa 2564 }
a23b6845 2565 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM
2566 {
2567 /* For the non-shared case, discard space for relocs against
2568 symbols which turn out to need copy relocs or are not
2569 dynamic. */
2570
f5385ebf
AM
2571 if (!h->non_got_ref
2572 && ((h->def_dynamic
2573 && !h->def_regular)
ebe50bae 2574 || (htab->elf.dynamic_sections_created
0c715baa
AM
2575 && (h->root.type == bfd_link_hash_undefweak
2576 || h->root.type == bfd_link_hash_undefined))))
2577 {
2578 /* Make sure this symbol is output as a dynamic symbol.
2579 Undefined weak syms won't yet be marked as dynamic. */
2580 if (h->dynindx == -1
f5385ebf 2581 && !h->forced_local)
0c715baa 2582 {
c152c796 2583 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2584 return FALSE;
0c715baa 2585 }
5a15f56f 2586
0c715baa
AM
2587 /* If that succeeded, we know we'll be keeping all the
2588 relocs. */
2589 if (h->dynindx != -1)
2590 goto keep;
2591 }
2592
2593 eh->dyn_relocs = NULL;
2594
ec338859 2595 keep: ;
5a15f56f
AM
2596 }
2597
0c715baa
AM
2598 /* Finally, allocate space. */
2599 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 2600 {
e7c33416
NC
2601 asection *sreloc;
2602
cbe950e9 2603 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC
2604
2605 BFD_ASSERT (sreloc != NULL);
eea6121a 2606 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM
2607 }
2608
b34976b6 2609 return TRUE;
6725bdbf
AM
2610}
2611
c25bc9fc
L
2612/* Allocate space in .plt, .got and associated reloc sections for
2613 local dynamic relocs. */
2614
2615static bfd_boolean
2616elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2617{
2618 struct elf_link_hash_entry *h
2619 = (struct elf_link_hash_entry *) *slot;
2620
2621 if (h->type != STT_GNU_IFUNC
2622 || !h->def_regular
2623 || !h->ref_regular
2624 || !h->forced_local
2625 || h->root.type != bfd_link_hash_defined)
2626 abort ();
2627
2628 return elf_i386_allocate_dynrelocs (h, inf);
2629}
2630
0c715baa
AM
2631/* Find any dynamic relocs that apply to read-only sections. */
2632
b34976b6 2633static bfd_boolean
eb4ff4d6 2634elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
0c715baa
AM
2635{
2636 struct elf_i386_link_hash_entry *eh;
e03a8ed8 2637 struct elf_dyn_relocs *p;
0c715baa 2638
aa715242
L
2639 /* Skip local IFUNC symbols. */
2640 if (h->forced_local && h->type == STT_GNU_IFUNC)
2641 return TRUE;
2642
0c715baa
AM
2643 eh = (struct elf_i386_link_hash_entry *) h;
2644 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2645 {
2646 asection *s = p->sec->output_section;
2647
2648 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2649 {
2650 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2651
2652 info->flags |= DF_TEXTREL;
2653
1952c5cd
L
2654 if ((info->warn_shared_textrel && info->shared)
2655 || info->error_textrel)
2656 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
b70321a2
L
2657 p->sec->owner, h->root.root.string,
2658 p->sec);
2659
0c715baa 2660 /* Not an error, just cut short the traversal. */
b34976b6 2661 return FALSE;
0c715baa
AM
2662 }
2663 }
b34976b6 2664 return TRUE;
0c715baa
AM
2665}
2666
daa67607
L
2667/* Convert
2668 mov foo@GOT(%reg), %reg
2669 to
2670 lea foo@GOTOFF(%reg), %reg
2671 with the local symbol, foo. */
2672
2673static bfd_boolean
2674elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2675 struct bfd_link_info *link_info)
2676{
2677 Elf_Internal_Shdr *symtab_hdr;
2678 Elf_Internal_Rela *internal_relocs;
2679 Elf_Internal_Rela *irel, *irelend;
2680 bfd_byte *contents;
2681 struct elf_i386_link_hash_table *htab;
2682 bfd_boolean changed_contents;
2683 bfd_boolean changed_relocs;
2684 bfd_signed_vma *local_got_refcounts;
2685
2686 /* Don't even try to convert non-ELF outputs. */
2687 if (!is_elf_hash_table (link_info->hash))
2688 return FALSE;
2689
c1d11331 2690 /* Nothing to do if there is no need or no output. */
daa67607 2691 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
c1d11331 2692 || sec->need_convert_mov_to_lea == 0
c8831961 2693 || bfd_is_abs_section (sec->output_section))
daa67607
L
2694 return TRUE;
2695
2696 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2697
2698 /* Load the relocations for this section. */
2699 internal_relocs = (_bfd_elf_link_read_relocs
2700 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2701 link_info->keep_memory));
2702 if (internal_relocs == NULL)
2703 return FALSE;
2704
2705 htab = elf_i386_hash_table (link_info);
2706 changed_contents = FALSE;
2707 changed_relocs = FALSE;
2708 local_got_refcounts = elf_local_got_refcounts (abfd);
2709
2710 /* Get the section contents. */
2711 if (elf_section_data (sec)->this_hdr.contents != NULL)
2712 contents = elf_section_data (sec)->this_hdr.contents;
2713 else
2714 {
2715 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2716 goto error_return;
2717 }
2718
2719 irelend = internal_relocs + sec->reloc_count;
2720 for (irel = internal_relocs; irel < irelend; irel++)
2721 {
2722 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2723 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2724 unsigned int indx;
2725 struct elf_link_hash_entry *h;
2726
2727 if (r_type != R_386_GOT32)
2728 continue;
2729
2730 /* Get the symbol referred to by the reloc. */
2731 if (r_symndx < symtab_hdr->sh_info)
2732 {
2733 Elf_Internal_Sym *isym;
2734
2735 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2736 abfd, r_symndx);
2737
2738 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2739 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
5697705a 2740 && irel->r_offset >= 2
4b71eec6 2741 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
daa67607 2742 {
4b71eec6 2743 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
daa67607
L
2744 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2745 if (local_got_refcounts != NULL
2746 && local_got_refcounts[r_symndx] > 0)
2747 local_got_refcounts[r_symndx] -= 1;
2748 changed_contents = TRUE;
2749 changed_relocs = TRUE;
2750 }
2751 continue;
2752 }
2753
2754 indx = r_symndx - symtab_hdr->sh_info;
2755 h = elf_sym_hashes (abfd)[indx];
2756 BFD_ASSERT (h != NULL);
2757
2758 while (h->root.type == bfd_link_hash_indirect
2759 || h->root.type == bfd_link_hash_warning)
2760 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2761
3f65f599
L
2762 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2763 optimizing _DYNAMIC since ld.so may use its link-time address. */
daa67607
L
2764 if (h->def_regular
2765 && h->type != STT_GNU_IFUNC
9637f6ef 2766 && h != htab->elf.hdynamic
daa67607 2767 && SYMBOL_REFERENCES_LOCAL (link_info, h)
5697705a 2768 && irel->r_offset >= 2
4b71eec6 2769 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
daa67607 2770 {
4b71eec6 2771 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
daa67607
L
2772 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2773 if (h->got.refcount > 0)
2774 h->got.refcount -= 1;
2775 changed_contents = TRUE;
2776 changed_relocs = TRUE;
2777 }
2778 }
2779
2780 if (contents != NULL
2781 && elf_section_data (sec)->this_hdr.contents != contents)
2782 {
2783 if (!changed_contents && !link_info->keep_memory)
2784 free (contents);
2785 else
2786 {
2787 /* Cache the section contents for elf_link_input_bfd. */
2788 elf_section_data (sec)->this_hdr.contents = contents;
2789 }
2790 }
2791
2792 if (elf_section_data (sec)->relocs != internal_relocs)
2793 {
2794 if (!changed_relocs)
2795 free (internal_relocs);
2796 else
2797 elf_section_data (sec)->relocs = internal_relocs;
2798 }
2799
2800 return TRUE;
2801
2802 error_return:
2803 if (contents != NULL
2804 && elf_section_data (sec)->this_hdr.contents != contents)
2805 free (contents);
2806 if (internal_relocs != NULL
2807 && elf_section_data (sec)->relocs != internal_relocs)
2808 free (internal_relocs);
2809 return FALSE;
2810}
2811
252b5132
RH
2812/* Set the sizes of the dynamic sections. */
2813
b34976b6 2814static bfd_boolean
23209a78 2815elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
252b5132 2816{
6725bdbf 2817 struct elf_i386_link_hash_table *htab;
252b5132
RH
2818 bfd *dynobj;
2819 asection *s;
b34976b6 2820 bfd_boolean relocs;
0c715baa 2821 bfd *ibfd;
252b5132 2822
6725bdbf 2823 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
2824 if (htab == NULL)
2825 return FALSE;
ebe50bae 2826 dynobj = htab->elf.dynobj;
ffb2e45b
AM
2827 if (dynobj == NULL)
2828 abort ();
252b5132 2829
ebe50bae 2830 if (htab->elf.dynamic_sections_created)
252b5132
RH
2831 {
2832 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 2833 if (info->executable)
252b5132 2834 {
3d4d4302 2835 s = bfd_get_linker_section (dynobj, ".interp");
ffb2e45b
AM
2836 if (s == NULL)
2837 abort ();
eea6121a 2838 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH
2839 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2840 }
161d71a6 2841 }
6725bdbf 2842
0c715baa
AM
2843 /* Set up .got offsets for local syms, and space for local dynamic
2844 relocs. */
c72f2fb2 2845 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
161d71a6
L
2846 {
2847 bfd_signed_vma *local_got;
2848 bfd_signed_vma *end_local_got;
13ae64f3 2849 char *local_tls_type;
67a4f2b7 2850 bfd_vma *local_tlsdesc_gotent;
161d71a6
L
2851 bfd_size_type locsymcount;
2852 Elf_Internal_Shdr *symtab_hdr;
2853 asection *srel;
6725bdbf 2854
0ffa91dd 2855 if (! is_i386_elf (ibfd))
161d71a6 2856 continue;
6725bdbf 2857
0c715baa
AM
2858 for (s = ibfd->sections; s != NULL; s = s->next)
2859 {
e03a8ed8 2860 struct elf_dyn_relocs *p;
0c715baa 2861
daa67607
L
2862 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2863 return FALSE;
2864
e03a8ed8 2865 for (p = ((struct elf_dyn_relocs *)
e81d3500 2866 elf_section_data (s)->local_dynrel);
ec338859
AM
2867 p != NULL;
2868 p = p->next)
0c715baa 2869 {
ec338859
AM
2870 if (!bfd_is_abs_section (p->sec)
2871 && bfd_is_abs_section (p->sec->output_section))
2872 {
2873 /* Input section has been discarded, either because
2874 it is a copy of a linkonce section or due to
2875 linker script /DISCARD/, so we'll be discarding
2876 the relocs too. */
2877 }
23209a78 2878 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3348747a
NS
2879 && strcmp (p->sec->output_section->name,
2880 ".tls_vars") == 0)
2881 {
2882 /* Relocations in vxworks .tls_vars sections are
2883 handled specially by the loader. */
2884 }
248866a8 2885 else if (p->count != 0)
ec338859
AM
2886 {
2887 srel = elf_section_data (p->sec)->sreloc;
eea6121a 2888 srel->size += p->count * sizeof (Elf32_External_Rel);
4b819e1f
L
2889 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2890 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L
2891 {
2892 info->flags |= DF_TEXTREL;
1952c5cd
L
2893 if ((info->warn_shared_textrel && info->shared)
2894 || info->error_textrel)
2895 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 2896 p->sec->owner, p->sec);
b70321a2 2897 }
ec338859 2898 }
0c715baa
AM
2899 }
2900 }
2901
2902 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L
2903 if (!local_got)
2904 continue;
6725bdbf 2905
0ffa91dd 2906 symtab_hdr = &elf_symtab_hdr (ibfd);
161d71a6
L
2907 locsymcount = symtab_hdr->sh_info;
2908 end_local_got = local_got + locsymcount;
13ae64f3 2909 local_tls_type = elf_i386_local_got_tls_type (ibfd);
67a4f2b7 2910 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
6de2ae4a
L
2911 s = htab->elf.sgot;
2912 srel = htab->elf.srelgot;
67a4f2b7
AO
2913 for (; local_got < end_local_got;
2914 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 2915 {
67a4f2b7 2916 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 2917 if (*local_got > 0)
6725bdbf 2918 {
67a4f2b7
AO
2919 if (GOT_TLS_GDESC_P (*local_tls_type))
2920 {
6de2ae4a 2921 *local_tlsdesc_gotent = htab->elf.sgotplt->size
67a4f2b7 2922 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2923 htab->elf.sgotplt->size += 8;
67a4f2b7
AO
2924 *local_got = (bfd_vma) -2;
2925 }
2926 if (! GOT_TLS_GDESC_P (*local_tls_type)
2927 || GOT_TLS_GD_P (*local_tls_type))
2928 {
2929 *local_got = s->size;
2930 s->size += 4;
2931 if (GOT_TLS_GD_P (*local_tls_type)
2932 || *local_tls_type == GOT_TLS_IE_BOTH)
2933 s->size += 4;
2934 }
13ae64f3 2935 if (info->shared
67a4f2b7 2936 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ
2937 || (*local_tls_type & GOT_TLS_IE))
2938 {
2939 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 2940 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO
2941 else if (GOT_TLS_GD_P (*local_tls_type)
2942 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 2943 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7 2944 if (GOT_TLS_GDESC_P (*local_tls_type))
6de2ae4a 2945 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
37e55690 2946 }
6725bdbf 2947 }
161d71a6
L
2948 else
2949 *local_got = (bfd_vma) -1;
6725bdbf 2950 }
252b5132 2951 }
6725bdbf 2952
13ae64f3
JJ
2953 if (htab->tls_ldm_got.refcount > 0)
2954 {
2955 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2956 relocs. */
6de2ae4a
L
2957 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2958 htab->elf.sgot->size += 8;
2959 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ
2960 }
2961 else
2962 htab->tls_ldm_got.offset = -1;
2963
0c715baa
AM
2964 /* Allocate global sym .plt and .got entries, and space for global
2965 sym dynamic relocs. */
eb4ff4d6 2966 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
252b5132 2967
c25bc9fc
L
2968 /* Allocate .plt and .got entries, and space for local symbols. */
2969 htab_traverse (htab->loc_hash_table,
2970 elf_i386_allocate_local_dynrelocs,
2971 info);
2972
67a4f2b7
AO
2973 /* For every jump slot reserved in the sgotplt, reloc_count is
2974 incremented. However, when we reserve space for TLS descriptors,
2975 it's not incremented, so in order to compute the space reserved
2976 for them, it suffices to multiply the reloc count by the jump
e1f98742 2977 slot size.
caa0075c 2978
e1f98742
L
2979 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2980 so that R_386_IRELATIVE entries come last. */
6de2ae4a 2981 if (htab->elf.srelplt)
e1f98742
L
2982 {
2983 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2984 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2985 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2986 }
2987 else if (htab->elf.irelplt)
2988 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2989
67a4f2b7 2990
a7b16ceb
L
2991 if (htab->elf.sgotplt)
2992 {
2993 /* Don't allocate .got.plt section if there are no GOT nor PLT
9a2a56cc 2994 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L
2995 if ((htab->elf.hgot == NULL
2996 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L
2997 && (htab->elf.sgotplt->size
2998 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L
2999 && (htab->elf.splt == NULL
3000 || htab->elf.splt->size == 0)
3001 && (htab->elf.sgot == NULL
3002 || htab->elf.sgot->size == 0)
3003 && (htab->elf.iplt == NULL
3004 || htab->elf.iplt->size == 0)
3005 && (htab->elf.igotplt == NULL
3006 || htab->elf.igotplt->size == 0))
3007 htab->elf.sgotplt->size = 0;
3008 }
3009
9a2a56cc
AM
3010
3011 if (htab->plt_eh_frame != NULL
3012 && htab->elf.splt != NULL
3013 && htab->elf.splt->size != 0
3014 && !bfd_is_abs_section (htab->elf.splt->output_section)
3015 && _bfd_elf_eh_frame_present (info))
3016 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3017
5a15f56f
AM
3018 /* We now have determined the sizes of the various dynamic sections.
3019 Allocate memory for them. */
b34976b6 3020 relocs = FALSE;
252b5132
RH
3021 for (s = dynobj->sections; s != NULL; s = s->next)
3022 {
eac338cf
PB
3023 bfd_boolean strip_section = TRUE;
3024
252b5132
RH
3025 if ((s->flags & SEC_LINKER_CREATED) == 0)
3026 continue;
3027
6de2ae4a 3028 if (s == htab->elf.splt
9a2a56cc 3029 || s == htab->elf.sgot)
252b5132 3030 {
6725bdbf
AM
3031 /* Strip this section if we don't need it; see the
3032 comment below. */
eac338cf
PB
3033 /* We'd like to strip these sections if they aren't needed, but if
3034 we've exported dynamic symbols from them we must leave them.
3035 It's too late to tell BFD to get rid of the symbols. */
3036
7325306f 3037 if (htab->elf.hplt != NULL)
eac338cf 3038 strip_section = FALSE;
252b5132 3039 }
9a2a56cc
AM
3040 else if (s == htab->elf.sgotplt
3041 || s == htab->elf.iplt
3042 || s == htab->elf.igotplt
dd7e64d4 3043 || s == htab->plt_got
9a2a56cc
AM
3044 || s == htab->plt_eh_frame
3045 || s == htab->sdynbss)
3046 {
3047 /* Strip these too. */
3048 }
0112cd26 3049 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
252b5132 3050 {
6de2ae4a
L
3051 if (s->size != 0
3052 && s != htab->elf.srelplt
3053 && s != htab->srelplt2)
b34976b6 3054 relocs = TRUE;
252b5132 3055
0ac8d2ca
AM
3056 /* We use the reloc_count field as a counter if we need
3057 to copy relocs into the output file. */
5ae0bfb6 3058 s->reloc_count = 0;
252b5132 3059 }
6725bdbf 3060 else
252b5132
RH
3061 {
3062 /* It's not one of our sections, so don't allocate space. */
3063 continue;
3064 }
3065
c456f082 3066 if (s->size == 0)
252b5132 3067 {
0ac8d2ca
AM
3068 /* If we don't need this section, strip it from the
3069 output file. This is mostly to handle .rel.bss and
3070 .rel.plt. We must create both sections in
3071 create_dynamic_sections, because they must be created
3072 before the linker maps input sections to output
3073 sections. The linker does that before
3074 adjust_dynamic_symbol is called, and it is that
3075 function which decides whether anything needs to go
3076 into these sections. */
c456f082
AM
3077 if (strip_section)
3078 s->flags |= SEC_EXCLUDE;
252b5132
RH
3079 continue;
3080 }
3081
c456f082
AM
3082 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3083 continue;
3084
f69da49f
AM
3085 /* Allocate memory for the section contents. We use bfd_zalloc
3086 here in case unused entries are not reclaimed before the
3087 section's contents are written out. This should not happen,
3088 but this way if it does, we get a R_386_NONE reloc instead
3089 of garbage. */
a50b1753 3090 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
6725bdbf 3091 if (s->contents == NULL)
b34976b6 3092 return FALSE;
252b5132
RH
3093 }
3094
e41b3a13 3095 if (htab->plt_eh_frame != NULL
9a2a56cc
AM
3096 && htab->plt_eh_frame->contents != NULL)
3097 {
3098 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3099 sizeof (elf_i386_eh_frame_plt));
3100 bfd_put_32 (dynobj, htab->elf.splt->size,
3101 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3102 }
e41b3a13 3103
ebe50bae 3104 if (htab->elf.dynamic_sections_created)
252b5132
RH
3105 {
3106 /* Add some entries to the .dynamic section. We fill in the
3107 values later, in elf_i386_finish_dynamic_sections, but we
3108 must add the entries now so that we get the correct size for
3109 the .dynamic section. The DT_DEBUG entry is filled in by the
3110 dynamic linker and used by the debugger. */
dc810e39 3111#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3112 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3113
36af4a4e 3114 if (info->executable)
252b5132 3115 {
dc810e39 3116 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3117 return FALSE;
252b5132
RH
3118 }
3119
6de2ae4a 3120 if (htab->elf.splt->size != 0)
252b5132 3121 {
7c1e8d3e
L
3122 /* DT_PLTGOT is used by prelink even if there is no PLT
3123 relocation. */
3124 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 3125 return FALSE;
7c1e8d3e
L
3126
3127 if (htab->elf.srelplt->size != 0)
3128 {
3129 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3130 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3131 || !add_dynamic_entry (DT_JMPREL, 0))
3132 return FALSE;
3133 }
252b5132
RH
3134 }
3135
3136 if (relocs)
3137 {
dc810e39
AM
3138 if (!add_dynamic_entry (DT_REL, 0)
3139 || !add_dynamic_entry (DT_RELSZ, 0)
3140 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 3141 return FALSE;
252b5132 3142
0c715baa
AM
3143 /* If any dynamic relocs apply to a read-only section,
3144 then we need a DT_TEXTREL entry. */
248866a8 3145 if ((info->flags & DF_TEXTREL) == 0)
eb4ff4d6
L
3146 elf_link_hash_traverse (&htab->elf,
3147 elf_i386_readonly_dynrelocs, info);
0c715baa
AM
3148
3149 if ((info->flags & DF_TEXTREL) != 0)
3150 {
3151 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3152 return FALSE;
0c715baa 3153 }
252b5132 3154 }
23209a78 3155 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
7a2b07ff
NS
3156 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3157 return FALSE;
252b5132 3158 }
dc810e39 3159#undef add_dynamic_entry
252b5132 3160
b34976b6 3161 return TRUE;
252b5132
RH
3162}
3163
67a4f2b7
AO
3164static bfd_boolean
3165elf_i386_always_size_sections (bfd *output_bfd,
3166 struct bfd_link_info *info)
3167{
3168 asection *tls_sec = elf_hash_table (info)->tls_sec;
3169
3170 if (tls_sec)
3171 {
3172 struct elf_link_hash_entry *tlsbase;
3173
3174 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3175 "_TLS_MODULE_BASE_",
3176 FALSE, FALSE, FALSE);
3177
3178 if (tlsbase && tlsbase->type == STT_TLS)
3179 {
4dfe6ac6 3180 struct elf_i386_link_hash_table *htab;
67a4f2b7
AO
3181 struct bfd_link_hash_entry *bh = NULL;
3182 const struct elf_backend_data *bed
3183 = get_elf_backend_data (output_bfd);
3184
4dfe6ac6
NC
3185 htab = elf_i386_hash_table (info);
3186 if (htab == NULL)
3187 return FALSE;
3188
67a4f2b7
AO
3189 if (!(_bfd_generic_link_add_one_symbol
3190 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3191 tls_sec, 0, NULL, FALSE,
3192 bed->collect, &bh)))
3193 return FALSE;
9f03412a 3194
4dfe6ac6 3195 htab->tls_module_base = bh;
9f03412a 3196
67a4f2b7
AO
3197 tlsbase = (struct elf_link_hash_entry *)bh;
3198 tlsbase->def_regular = 1;
3199 tlsbase->other = STV_HIDDEN;
576fa883 3200 tlsbase->root.linker_def = 1;
67a4f2b7
AO
3201 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3202 }
3203 }
3204
3205 return TRUE;
3206}
3207
38701953
AM
3208/* Set the correct type for an x86 ELF section. We do this by the
3209 section name, which is a hack, but ought to work. */
3210
b34976b6 3211static bfd_boolean
55fd94b0
AM
3212elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3213 Elf_Internal_Shdr *hdr,
3214 asection *sec)
38701953 3215{
91d6fa6a 3216 const char *name;
38701953
AM
3217
3218 name = bfd_get_section_name (abfd, sec);
3219
3220 /* This is an ugly, but unfortunately necessary hack that is
3221 needed when producing EFI binaries on x86. It tells
3222 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3223 containing ELF relocation info. We need this hack in order to
3224 be able to generate ELF binaries that can be translated into
3225 EFI applications (which are essentially COFF objects). Those
3226 files contain a COFF ".reloc" section inside an ELFNN object,
3227 which would normally cause BFD to segfault because it would
3228 attempt to interpret this section as containing relocation
3229 entries for section "oc". With this hack enabled, ".reloc"
3230 will be treated as a normal data section, which will avoid the
3231 segfault. However, you won't be able to create an ELFNN binary
3232 with a section named "oc" that needs relocations, but that's
3233 the kind of ugly side-effects you get when detecting section
3234 types based on their names... In practice, this limitation is
3235 unlikely to bite. */
3236 if (strcmp (name, ".reloc") == 0)
3237 hdr->sh_type = SHT_PROGBITS;
3238
b34976b6 3239 return TRUE;
38701953
AM
3240}
3241
9f03412a
AO
3242/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3243 executables. Rather than setting it to the beginning of the TLS
3244 section, we have to set it to the end. This function may be called
3245 multiple times, it is idempotent. */
3246
3247static void
eb4ff4d6 3248elf_i386_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3249{
4dfe6ac6 3250 struct elf_i386_link_hash_table *htab;
9f03412a
AO
3251 struct bfd_link_hash_entry *base;
3252
3253 if (!info->executable)
3254 return;
3255
4dfe6ac6
NC
3256 htab = elf_i386_hash_table (info);
3257 if (htab == NULL)
3258 return;
9f03412a 3259
4dfe6ac6
NC
3260 base = htab->tls_module_base;
3261 if (base == NULL)
9f03412a
AO
3262 return;
3263
4dfe6ac6 3264 base->u.def.value = htab->elf.tls_size;
9f03412a
AO
3265}
3266
13ae64f3
JJ
3267/* Return the base VMA address which should be subtracted from real addresses
3268 when resolving @dtpoff relocation.
3269 This is PT_TLS segment p_vaddr. */
3270
3271static bfd_vma
eb4ff4d6 3272elf_i386_dtpoff_base (struct bfd_link_info *info)
13ae64f3 3273{
e1918d23
AM
3274 /* If tls_sec is NULL, we should have signalled an error already. */
3275 if (elf_hash_table (info)->tls_sec == NULL)
6a30718d 3276 return 0;
e1918d23 3277 return elf_hash_table (info)->tls_sec->vma;
13ae64f3
JJ
3278}
3279
3280/* Return the relocation value for @tpoff relocation
3281 if STT_TLS virtual address is ADDRESS. */
3282
3283static bfd_vma
eb4ff4d6 3284elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 3285{
e1918d23 3286 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO
3287 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3288 bfd_vma static_tls_size;
13ae64f3 3289
e1918d23
AM
3290 /* If tls_sec is NULL, we should have signalled an error already. */
3291 if (htab->tls_sec == NULL)
6a30718d 3292 return 0;
7dc98aea
RO
3293
3294 /* Consider special static TLS alignment requirements. */
3295 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3296 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ
3297}
3298
252b5132
RH
3299/* Relocate an i386 ELF section. */
3300
b34976b6 3301static bfd_boolean
55fd94b0
AM
3302elf_i386_relocate_section (bfd *output_bfd,
3303 struct bfd_link_info *info,
3304 bfd *input_bfd,
3305 asection *input_section,
3306 bfd_byte *contents,
3307 Elf_Internal_Rela *relocs,
3308 Elf_Internal_Sym *local_syms,
3309 asection **local_sections)
252b5132 3310{
6725bdbf 3311 struct elf_i386_link_hash_table *htab;
252b5132
RH
3312 Elf_Internal_Shdr *symtab_hdr;
3313 struct elf_link_hash_entry **sym_hashes;
3314 bfd_vma *local_got_offsets;
67a4f2b7 3315 bfd_vma *local_tlsdesc_gotents;
252b5132
RH
3316 Elf_Internal_Rela *rel;
3317 Elf_Internal_Rela *relend;
3348747a 3318 bfd_boolean is_vxworks_tls;
25e762b9 3319 unsigned plt_entry_size;
252b5132 3320
0ffa91dd 3321 BFD_ASSERT (is_i386_elf (input_bfd));
6bbec505 3322
6725bdbf 3323 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
3324 if (htab == NULL)
3325 return FALSE;
0ffa91dd 3326 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH
3327 sym_hashes = elf_sym_hashes (input_bfd);
3328 local_got_offsets = elf_local_got_offsets (input_bfd);
67a4f2b7 3329 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3348747a
NS
3330 /* We have to handle relocations in vxworks .tls_vars sections
3331 specially, because the dynamic loader is 'weird'. */
23209a78
RM
3332 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3333 && info->shared
3348747a
NS
3334 && !strcmp (input_section->output_section->name,
3335 ".tls_vars"));
252b5132 3336
eb4ff4d6 3337 elf_i386_set_tls_module_base (info);
9f03412a 3338
25e762b9
RM
3339 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3340
252b5132
RH
3341 rel = relocs;
3342 relend = relocs + input_section->reloc_count;
3343 for (; rel < relend; rel++)
3344 {
13ae64f3 3345 unsigned int r_type;
252b5132
RH
3346 reloc_howto_type *howto;
3347 unsigned long r_symndx;
3348 struct elf_link_hash_entry *h;
dd7e64d4 3349 struct elf_i386_link_hash_entry *eh;
252b5132
RH
3350 Elf_Internal_Sym *sym;
3351 asection *sec;
dd7e64d4 3352 bfd_vma off, offplt, plt_offset;
252b5132 3353 bfd_vma relocation;
b34976b6 3354 bfd_boolean unresolved_reloc;
252b5132 3355 bfd_reloc_status_type r;
1b452ec6 3356 unsigned int indx;
13ae64f3 3357 int tls_type;
1788fc08 3358 bfd_vma st_size;
dd7e64d4 3359 asection *resolved_plt;
252b5132
RH
3360
3361 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM
3362 if (r_type == R_386_GNU_VTINHERIT
3363 || r_type == R_386_GNU_VTENTRY)
252b5132 3364 continue;
dc47f327 3365
55fd94b0 3366 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ
3367 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3368 >= R_386_ext - R_386_standard)
3369 && ((indx = r_type - R_386_tls_offset) - R_386_ext
cbe950e9 3370 >= R_386_irelative - R_386_ext))
252b5132 3371 {
6ba842b6 3372 (*_bfd_error_handler)
d003868e
AM
3373 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3374 input_bfd, input_section, r_type);
252b5132 3375 bfd_set_error (bfd_error_bad_value);
b34976b6 3376 return FALSE;
252b5132 3377 }
1b452ec6 3378 howto = elf_howto_table + indx;
252b5132
RH
3379
3380 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH
3381 h = NULL;
3382 sym = NULL;
3383 sec = NULL;
b34976b6 3384 unresolved_reloc = FALSE;
252b5132
RH
3385 if (r_symndx < symtab_hdr->sh_info)
3386 {
3387 sym = local_syms + r_symndx;
3388 sec = local_sections[r_symndx];
3389 relocation = (sec->output_section->vma
3390 + sec->output_offset
3391 + sym->st_value);
1788fc08 3392 st_size = sym->st_size;
ab96bf03
AM
3393
3394 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3395 && ((sec->flags & SEC_MERGE) != 0
3396 || (info->relocatable
3397 && sec->output_offset != 0)))
f8df10f4 3398 {
f8df10f4 3399 bfd_vma addend;
4a335f3d 3400 bfd_byte *where = contents + rel->r_offset;
f8df10f4 3401
4a335f3d 3402 switch (howto->size)
f8df10f4 3403 {
4a335f3d
AM
3404 case 0:
3405 addend = bfd_get_8 (input_bfd, where);
3406 if (howto->pc_relative)
3407 {
3408 addend = (addend ^ 0x80) - 0x80;
3409 addend += 1;
3410 }
3411 break;
3412 case 1:
3413 addend = bfd_get_16 (input_bfd, where);
3414 if (howto->pc_relative)
3415 {
3416 addend = (addend ^ 0x8000) - 0x8000;
3417 addend += 2;
3418 }
3419 break;
3420 case 2:
3421 addend = bfd_get_32 (input_bfd, where);
3422 if (howto->pc_relative)
3423 {
3424 addend = (addend ^ 0x80000000) - 0x80000000;
3425 addend += 4;
3426 }
3427 break;
3428 default:
3429 abort ();
f8df10f4
JJ
3430 }
3431
ab96bf03
AM
3432 if (info->relocatable)
3433 addend += sec->output_offset;
3434 else
3435 {
3436 asection *msec = sec;
3437 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3438 addend);
3439 addend -= relocation;
3440 addend += msec->output_section->vma + msec->output_offset;
3441 }
4a335f3d
AM
3442
3443 switch (howto->size)
3444 {
3445 case 0:
16a10388 3446 /* FIXME: overflow checks. */
4a335f3d
AM
3447 if (howto->pc_relative)
3448 addend -= 1;
3449 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM
3450 break;
3451 case 1:
3452 if (howto->pc_relative)
3453 addend -= 2;
3454 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM
3455 break;
3456 case 2:
3457 if (howto->pc_relative)
3458 addend -= 4;
3459 bfd_put_32 (input_bfd, addend, where);
3460 break;
3461 }
f8df10f4 3462 }
1f85278f
L
3463 else if (!info->relocatable
3464 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L
3465 {
3466 /* Relocate against local STT_GNU_IFUNC symbol. */
9fff0c39
L
3467 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3468 FALSE);
c25bc9fc
L
3469 if (h == NULL)
3470 abort ();
3471
23209a78 3472 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L
3473 h->root.u.def.value = sym->st_value;
3474 h->root.u.def.section = sec;
3475 }
252b5132
RH
3476 }
3477 else
3478 {
3d540e93 3479 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3480 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 3481
b2a8e766
AM
3482 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3483 r_symndx, symtab_hdr, sym_hashes,
3484 h, sec, relocation,
62d887d4 3485 unresolved_reloc, warned, ignored);
1788fc08 3486 st_size = h->size;
252b5132
RH
3487 }
3488
dbaa2011 3489 if (sec != NULL && discarded_section (sec))
0672748a 3490 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3491 rel, 1, relend, howto, 0, contents);
9635fe29 3492
ab96bf03
AM
3493 if (info->relocatable)
3494 continue;
3495
cbe950e9
L
3496 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3497 it here if it is defined in a non-shared object. */
3498 if (h != NULL
3499 && h->type == STT_GNU_IFUNC
3500 && h->def_regular)
3501 {
3502 asection *plt, *gotplt, *base_got;
3503 bfd_vma plt_index;
4c544807 3504 const char *name;
cbe950e9
L
3505
3506 if ((input_section->flags & SEC_ALLOC) == 0
3507 || h->plt.offset == (bfd_vma) -1)
3508 abort ();
3509
3510 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3511 if (htab->elf.splt != NULL)
cbe950e9 3512 {
6de2ae4a
L
3513 plt = htab->elf.splt;
3514 gotplt = htab->elf.sgotplt;
cbe950e9
L
3515 }
3516 else
3517 {
6de2ae4a
L
3518 plt = htab->elf.iplt;
3519 gotplt = htab->elf.igotplt;
cbe950e9
L
3520 }
3521
3522 relocation = (plt->output_section->vma
3523 + plt->output_offset + h->plt.offset);
3524
3525 switch (r_type)
3526 {
3527 default:
4c544807
L
3528 if (h->root.root.string)
3529 name = h->root.root.string;
3530 else
3531 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3532 NULL);
cbe950e9
L
3533 (*_bfd_error_handler)
3534 (_("%B: relocation %s against STT_GNU_IFUNC "
3535 "symbol `%s' isn't handled by %s"), input_bfd,
3536 elf_howto_table[r_type].name,
4c544807 3537 name, __FUNCTION__);
cbe950e9
L
3538 bfd_set_error (bfd_error_bad_value);
3539 return FALSE;
3540
3541 case R_386_32:
710ab287 3542 /* Generate dynamic relcoation only when there is a
c293fa49 3543 non-GOT reference in a shared object. */
710ab287
L
3544 if (info->shared && h->non_got_ref)
3545 {
3546 Elf_Internal_Rela outrel;
710ab287
L
3547 asection *sreloc;
3548 bfd_vma offset;
3549
c25bc9fc
L
3550 /* Need a dynamic relocation to get the real function
3551 adddress. */
710ab287
L
3552 offset = _bfd_elf_section_offset (output_bfd,
3553 info,
3554 input_section,
3555 rel->r_offset);
3556 if (offset == (bfd_vma) -1
3557 || offset == (bfd_vma) -2)
3558 abort ();
3559
3560 outrel.r_offset = (input_section->output_section->vma
3561 + input_section->output_offset
3562 + offset);
3563
3564 if (h->dynindx == -1
44c4ea11
L
3565 || h->forced_local
3566 || info->executable)
710ab287
L
3567 {
3568 /* This symbol is resolved locally. */
56b8aada
L
3569 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3570 bfd_put_32 (output_bfd,
3571 (h->root.u.def.value
3572 + h->root.u.def.section->output_section->vma
3573 + h->root.u.def.section->output_offset),
3574 contents + offset);
710ab287
L
3575 }
3576 else
56b8aada 3577 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
710ab287 3578
6de2ae4a 3579 sreloc = htab->elf.irelifunc;
59d6ffb2 3580 elf_append_rel (output_bfd, sreloc, &outrel);
710ab287
L
3581
3582 /* If this reloc is against an external symbol, we
3583 do not want to fiddle with the addend. Otherwise,
3584 we need to include the symbol value so that it
3585 becomes an addend for the dynamic reloc. For an
3586 internal symbol, we have updated addend. */
56b8aada 3587 continue;
710ab287 3588 }
d59a60e9 3589 /* FALLTHROUGH */
cbe950e9
L
3590 case R_386_PC32:
3591 case R_386_PLT32:
3592 goto do_relocation;
3593
3594 case R_386_GOT32:
6de2ae4a 3595 base_got = htab->elf.sgot;
cbe950e9
L
3596 off = h->got.offset;
3597
7afd84dc 3598 if (base_got == NULL)
cbe950e9
L
3599 abort ();
3600
7afd84dc 3601 if (off == (bfd_vma) -1)
cbe950e9 3602 {
7afd84dc
L
3603 /* We can't use h->got.offset here to save state, or
3604 even just remember the offset, as finish_dynamic_symbol
3605 would use that as offset into .got. */
6bbec505 3606
6de2ae4a 3607 if (htab->elf.splt != NULL)
7afd84dc 3608 {
25e762b9 3609 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3610 off = (plt_index + 3) * 4;
6de2ae4a 3611 base_got = htab->elf.sgotplt;
7afd84dc 3612 }
cbe950e9
L
3613 else
3614 {
25e762b9 3615 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3616 off = plt_index * 4;
6de2ae4a 3617 base_got = htab->elf.igotplt;
7afd84dc
L
3618 }
3619
3620 if (h->dynindx == -1
3621 || h->forced_local
3622 || info->symbolic)
3623 {
3624 /* This references the local defitionion. We must
3625 initialize this entry in the global offset table.
3626 Since the offset must always be a multiple of 8,
3627 we use the least significant bit to record
3628 whether we have initialized it already.
3629
3630 When doing a dynamic link, we create a .rela.got
3631 relocation entry to initialize the value. This
3632 is done in the finish_dynamic_symbol routine. */
3633 if ((off & 1) != 0)
3634 off &= ~1;
3635 else
3636 {
3637 bfd_put_32 (output_bfd, relocation,
3638 base_got->contents + off);
3639 h->got.offset |= 1;
3640 }
cbe950e9 3641 }
cbe950e9 3642
7afd84dc 3643 relocation = off;
cbe950e9 3644
7afd84dc 3645 /* Adjust for static executables. */
6de2ae4a 3646 if (htab->elf.splt == NULL)
7afd84dc
L
3647 relocation += gotplt->output_offset;
3648 }
3649 else
0018b0a3
L
3650 {
3651 relocation = (base_got->output_section->vma
3652 + base_got->output_offset + off
3653 - gotplt->output_section->vma
3654 - gotplt->output_offset);
3655 /* Adjust for static executables. */
6de2ae4a 3656 if (htab->elf.splt == NULL)
0018b0a3
L
3657 relocation += gotplt->output_offset;
3658 }
3659
cbe950e9
L
3660 goto do_relocation;
3661
3662 case R_386_GOTOFF:
3663 relocation -= (gotplt->output_section->vma
3664 + gotplt->output_offset);
3665 goto do_relocation;
3666 }
3667 }
3668
252b5132
RH
3669 switch (r_type)
3670 {
3671 case R_386_GOT32:
3672 /* Relocation is to the entry for this symbol in the global
3673 offset table. */
6de2ae4a 3674 if (htab->elf.sgot == NULL)
ffb2e45b 3675 abort ();
252b5132
RH
3676
3677 if (h != NULL)
3678 {
b34976b6 3679 bfd_boolean dyn;
252b5132
RH
3680
3681 off = h->got.offset;
ebe50bae 3682 dyn = htab->elf.dynamic_sections_created;
26e41594 3683 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
252b5132 3684 || (info->shared
586119b3 3685 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L
3686 || (ELF_ST_VISIBILITY (h->other)
3687 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH
3688 {
3689 /* This is actually a static link, or it is a
3690 -Bsymbolic link and the symbol is defined
3691 locally, or the symbol was forced to be local
3692 because of a version file. We must initialize
3693 this entry in the global offset table. Since the
3694 offset must always be a multiple of 4, we use the
3695 least significant bit to record whether we have
3696 initialized it already.
3697
3698 When doing a dynamic link, we create a .rel.got
3699 relocation entry to initialize the value. This
3700 is done in the finish_dynamic_symbol routine. */
3701 if ((off & 1) != 0)
3702 off &= ~1;
3703 else
3704 {
3705 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3706 htab->elf.sgot->contents + off);
252b5132
RH
3707 h->got.offset |= 1;
3708 }
3709 }
8c694914 3710 else
b34976b6 3711 unresolved_reloc = FALSE;
252b5132
RH
3712 }
3713 else
3714 {
ffb2e45b
AM
3715 if (local_got_offsets == NULL)
3716 abort ();
252b5132
RH
3717
3718 off = local_got_offsets[r_symndx];
3719
3720 /* The offset must always be a multiple of 4. We use
83be169b
AM
3721 the least significant bit to record whether we have
3722 already generated the necessary reloc. */
252b5132
RH
3723 if ((off & 1) != 0)
3724 off &= ~1;
3725 else
3726 {
6725bdbf 3727 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3728 htab->elf.sgot->contents + off);
252b5132
RH
3729
3730 if (info->shared)
3731 {
947216bf
AM
3732 asection *s;
3733 Elf_Internal_Rela outrel;
252b5132 3734
6de2ae4a 3735 s = htab->elf.srelgot;
947216bf 3736 if (s == NULL)
ffb2e45b 3737 abort ();
252b5132 3738
6de2ae4a
L
3739 outrel.r_offset = (htab->elf.sgot->output_section->vma
3740 + htab->elf.sgot->output_offset
252b5132
RH
3741 + off);
3742 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
59d6ffb2 3743 elf_append_rel (output_bfd, s, &outrel);
252b5132
RH
3744 }
3745
3746 local_got_offsets[r_symndx] |= 1;
3747 }
252b5132
RH
3748 }
3749
ffb2e45b
AM
3750 if (off >= (bfd_vma) -2)
3751 abort ();
3752
6de2ae4a
L
3753 relocation = htab->elf.sgot->output_section->vma
3754 + htab->elf.sgot->output_offset + off
3755 - htab->elf.sgotplt->output_section->vma
3756 - htab->elf.sgotplt->output_offset;
252b5132
RH
3757 break;
3758
3759 case R_386_GOTOFF:
3760 /* Relocation is relative to the start of the global offset
3761 table. */
3762
3d949995
L
3763 /* Check to make sure it isn't a protected function or data
3764 symbol for shared library since it may not be local when
3765 used as function address or with copy relocation. We also
e3c0e327 3766 need to make sure that a symbol is referenced locally. */
d5597ebc 3767 if (!info->executable && h)
90f487df 3768 {
41bed6dd
L
3769 if (!h->def_regular)
3770 {
3771 const char *v;
3772
3773 switch (ELF_ST_VISIBILITY (h->other))
3774 {
3775 case STV_HIDDEN:
3776 v = _("hidden symbol");
3777 break;
3778 case STV_INTERNAL:
3779 v = _("internal symbol");
3780 break;
3781 case STV_PROTECTED:
3782 v = _("protected symbol");
3783 break;
3784 default:
3785 v = _("symbol");
3786 break;
3787 }
3788
3789 (*_bfd_error_handler)
3790 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3791 input_bfd, v, h->root.root.string);
3792 bfd_set_error (bfd_error_bad_value);
3793 return FALSE;
3794 }
d5597ebc 3795 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3d949995
L
3796 && (h->type == STT_FUNC
3797 || h->type == STT_OBJECT)
41bed6dd
L
3798 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3799 {
3800 (*_bfd_error_handler)
3d949995
L
3801 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3802 input_bfd,
3803 h->type == STT_FUNC ? "function" : "data",
3804 h->root.root.string);
41bed6dd
L
3805 bfd_set_error (bfd_error_bad_value);
3806 return FALSE;
3807 }
90f487df
L
3808 }
3809
8c37241b
JJ
3810 /* Note that sgot is not involved in this
3811 calculation. We always want the start of .got.plt. If we
3812 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH
3813 permitted by the ABI, we might have to change this
3814 calculation. */
6de2ae4a
L
3815 relocation -= htab->elf.sgotplt->output_section->vma
3816 + htab->elf.sgotplt->output_offset;
252b5132
RH
3817 break;
3818
3819 case R_386_GOTPC:
3820 /* Use global offset table as symbol value. */
6de2ae4a
L
3821 relocation = htab->elf.sgotplt->output_section->vma
3822 + htab->elf.sgotplt->output_offset;
b34976b6 3823 unresolved_reloc = FALSE;
252b5132
RH
3824 break;
3825
3826 case R_386_PLT32:
3827 /* Relocation is to the entry for this symbol in the
3828 procedure linkage table. */
3829
dd5724d5 3830 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 3831 without using the procedure linkage table. */
252b5132
RH
3832 if (h == NULL)
3833 break;
3834
dd7e64d4
L
3835 eh = (struct elf_i386_link_hash_entry *) h;
3836 if ((h->plt.offset == (bfd_vma) -1
3837 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 3838 || htab->elf.splt == NULL)
252b5132
RH
3839 {
3840 /* We didn't make a PLT entry for this symbol. This
83be169b
AM
3841 happens when statically linking PIC code, or when
3842 using -Bsymbolic. */
252b5132
RH
3843 break;
3844 }
3845
dd7e64d4
L
3846 if (h->plt.offset != (bfd_vma) -1)
3847 {
3848 resolved_plt = htab->elf.splt;
3849 plt_offset = h->plt.offset;
3850 }
3851 else
3852 {
3853 resolved_plt = htab->plt_got;
3854 plt_offset = eh->plt_got.offset;
3855 }
3856
3857 relocation = (resolved_plt->output_section->vma
3858 + resolved_plt->output_offset
3859 + plt_offset);
b34976b6 3860 unresolved_reloc = FALSE;
252b5132
RH
3861 break;
3862
1788fc08 3863 case R_386_SIZE32:
1788fc08
L
3864 /* Set to symbol size. */
3865 relocation = st_size;
3866 /* Fall through. */
3867
252b5132
RH
3868 case R_386_32:
3869 case R_386_PC32:
3348747a
NS
3870 if ((input_section->flags & SEC_ALLOC) == 0
3871 || is_vxworks_tls)
ec338859
AM
3872 break;
3873
12d0ee4a 3874 if ((info->shared
ef5aade5
L
3875 && (h == NULL
3876 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3877 || h->root.type != bfd_link_hash_undefweak)
1788fc08 3878 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
f6c52c13 3879 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845
AM
3880 || (ELIMINATE_COPY_RELOCS
3881 && !info->shared
12d0ee4a
AM
3882 && h != NULL
3883 && h->dynindx != -1
f5385ebf
AM
3884 && !h->non_got_ref
3885 && ((h->def_dynamic
3886 && !h->def_regular)
28d0b90e 3887 || h->root.type == bfd_link_hash_undefweak
0f88be7a 3888 || h->root.type == bfd_link_hash_undefined)))
252b5132 3889 {
947216bf 3890 Elf_Internal_Rela outrel;
b34976b6 3891 bfd_boolean skip, relocate;
0c715baa 3892 asection *sreloc;
252b5132
RH
3893
3894 /* When generating a shared object, these relocations
3895 are copied into the output file to be resolved at run
3896 time. */
3897
b34976b6
AM
3898 skip = FALSE;
3899 relocate = FALSE;
252b5132 3900
c629eae0
JJ
3901 outrel.r_offset =
3902 _bfd_elf_section_offset (output_bfd, info, input_section,
3903 rel->r_offset);
3904 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 3905 skip = TRUE;
0bb2d96a 3906 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 3907 skip = TRUE, relocate = TRUE;
252b5132
RH
3908 outrel.r_offset += (input_section->output_section->vma
3909 + input_section->output_offset);
3910
3911 if (skip)
0bb2d96a 3912 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM
3913 else if (h != NULL
3914 && h->dynindx != -1
3915 && (r_type == R_386_PC32
3916 || !info->shared
55255dae 3917 || !SYMBOLIC_BIND (info, h)
f5385ebf 3918 || !h->def_regular))
0bb2d96a 3919 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH
3920 else
3921 {
5a15f56f 3922 /* This symbol is local, or marked to become local. */
b34976b6 3923 relocate = TRUE;
5a15f56f 3924 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH
3925 }
3926
cbe950e9 3927 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 3928
62d78908
L
3929 if (sreloc == NULL || sreloc->contents == NULL)
3930 {
3931 r = bfd_reloc_notsupported;
3932 goto check_relocation_error;
3933 }
0c715baa 3934
59d6ffb2 3935 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH
3936
3937 /* If this reloc is against an external symbol, we do
3938 not want to fiddle with the addend. Otherwise, we
3939 need to include the symbol value so that it becomes
3940 an addend for the dynamic reloc. */
0f88be7a 3941 if (! relocate)
252b5132
RH
3942 continue;
3943 }
252b5132
RH
3944 break;
3945
37e55690 3946 case R_386_TLS_IE:
1d85728f 3947 if (!info->executable)
37e55690 3948 {
947216bf 3949 Elf_Internal_Rela outrel;
37e55690 3950 asection *sreloc;
37e55690
JJ
3951
3952 outrel.r_offset = rel->r_offset
3953 + input_section->output_section->vma
3954 + input_section->output_offset;
3955 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3956 sreloc = elf_section_data (input_section)->sreloc;
3957 if (sreloc == NULL)
3958 abort ();
59d6ffb2 3959 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ
3960 }
3961 /* Fall through */
3962
13ae64f3 3963 case R_386_TLS_GD:
67a4f2b7
AO
3964 case R_386_TLS_GOTDESC:
3965 case R_386_TLS_DESC_CALL:
13ae64f3 3966 case R_386_TLS_IE_32:
37e55690 3967 case R_386_TLS_GOTIE:
13ae64f3
JJ
3968 tls_type = GOT_UNKNOWN;
3969 if (h == NULL && local_got_offsets)
3970 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3971 else if (h != NULL)
142411ca 3972 tls_type = elf_i386_hash_entry(h)->tls_type;
37e55690
JJ
3973 if (tls_type == GOT_TLS_IE)
3974 tls_type = GOT_TLS_IE_NEG;
142411ca
L
3975
3976 if (! elf_i386_tls_transition (info, input_bfd,
3977 input_section, contents,
3978 symtab_hdr, sym_hashes,
3979 &r_type, tls_type, rel,
4c544807 3980 relend, h, r_symndx))
142411ca 3981 return FALSE;
13ae64f3
JJ
3982
3983 if (r_type == R_386_TLS_LE_32)
3984 {
82e51918 3985 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ
3986 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3987 {
142411ca 3988 unsigned int type;
13ae64f3
JJ
3989 bfd_vma roff;
3990
3991 /* GD->LE transition. */
13ae64f3 3992 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ
3993 if (type == 0x04)
3994 {
3995 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3996 Change it into:
3997 movl %gs:0, %eax; subl $foo@tpoff, %eax
3998 (6 byte form of subl). */
13ae64f3
JJ
3999 memcpy (contents + rel->r_offset - 3,
4000 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
142411ca 4001 roff = rel->r_offset + 5;
13ae64f3
JJ
4002 }
4003 else
4004 {
142411ca
L
4005 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4006 Change it into:
4007 movl %gs:0, %eax; subl $foo@tpoff, %eax
4008 (6 byte form of subl). */
4009 memcpy (contents + rel->r_offset - 2,
4010 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4011 roff = rel->r_offset + 6;
13ae64f3 4012 }
eb4ff4d6 4013 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 4014 contents + roff);
a3fadc9a 4015 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3
JJ
4016 rel++;
4017 continue;
4018 }
67a4f2b7
AO
4019 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4020 {
4021 /* GDesc -> LE transition.
4022 It's originally something like:
4023 leal x@tlsdesc(%ebx), %eax
4024
4025 leal x@ntpoff, %eax
4026
4027 Registers other than %eax may be set up here. */
4028
142411ca 4029 unsigned int val;
67a4f2b7
AO
4030 bfd_vma roff;
4031
67a4f2b7 4032 roff = rel->r_offset;
67a4f2b7 4033 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO
4034
4035 /* Now modify the instruction as appropriate. */
4036 /* aoliva FIXME: remove the above and xor the byte
4037 below with 0x86. */
4038 bfd_put_8 (output_bfd, val ^ 0x86,
4039 contents + roff - 1);
eb4ff4d6 4040 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO
4041 contents + roff);
4042 continue;
4043 }
4044 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4045 {
4046 /* GDesc -> LE transition.
4047 It's originally:
4048 call *(%eax)
4049 Turn it into:
142411ca 4050 xchg %ax,%ax */
67a4f2b7 4051
67a4f2b7 4052 bfd_vma roff;
6bbec505 4053
67a4f2b7 4054 roff = rel->r_offset;
10efb593 4055 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO
4056 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4057 continue;
4058 }
37e55690 4059 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3 4060 {
142411ca 4061 unsigned int val;
13ae64f3
JJ
4062
4063 /* IE->LE transition:
37e55690
JJ
4064 Originally it can be one of:
4065 movl foo, %eax
4066 movl foo, %reg
4067 addl foo, %reg
4068 We change it into:
4069 movl $foo, %eax
4070 movl $foo, %reg
4071 addl $foo, %reg. */
37e55690 4072 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ
4073 if (val == 0xa1)
4074 {
4075 /* movl foo, %eax. */
55fd94b0
AM
4076 bfd_put_8 (output_bfd, 0xb8,
4077 contents + rel->r_offset - 1);
37e55690 4078 }
299bf759 4079 else
37e55690 4080 {
142411ca
L
4081 unsigned int type;
4082
55fd94b0
AM
4083 type = bfd_get_8 (input_bfd,
4084 contents + rel->r_offset - 2);
299bf759 4085 switch (type)
26e41594 4086 {
299bf759
L
4087 case 0x8b:
4088 /* movl */
299bf759
L
4089 bfd_put_8 (output_bfd, 0xc7,
4090 contents + rel->r_offset - 2);
4091 bfd_put_8 (output_bfd,
4092 0xc0 | ((val >> 3) & 7),
4093 contents + rel->r_offset - 1);
4094 break;
4095 case 0x03:
4096 /* addl */
299bf759
L
4097 bfd_put_8 (output_bfd, 0x81,
4098 contents + rel->r_offset - 2);
4099 bfd_put_8 (output_bfd,
4100 0xc0 | ((val >> 3) & 7),
4101 contents + rel->r_offset - 1);
4102 break;
4103 default:
4104 BFD_FAIL ();
4105 break;
26e41594 4106 }
37e55690 4107 }
eb4ff4d6 4108 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ
4109 contents + rel->r_offset);
4110 continue;
4111 }
4112 else
4113 {
4114 unsigned int val, type;
4115
4116 /* {IE_32,GOTIE}->LE transition:
4117 Originally it can be one of:
13ae64f3 4118 subl foo(%reg1), %reg2
13ae64f3 4119 movl foo(%reg1), %reg2
37e55690 4120 addl foo(%reg1), %reg2
13ae64f3
JJ
4121 We change it into:
4122 subl $foo, %reg2
37e55690
JJ
4123 movl $foo, %reg2 (6 byte form)
4124 addl $foo, %reg2. */
13ae64f3
JJ
4125 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4126 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ
4127 if (type == 0x8b)
4128 {
4129 /* movl */
13ae64f3
JJ
4130 bfd_put_8 (output_bfd, 0xc7,
4131 contents + rel->r_offset - 2);
4132 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4133 contents + rel->r_offset - 1);
4134 }
4135 else if (type == 0x2b)
4136 {
4137 /* subl */
13ae64f3
JJ
4138 bfd_put_8 (output_bfd, 0x81,
4139 contents + rel->r_offset - 2);
4140 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4141 contents + rel->r_offset - 1);
4142 }
37e55690
JJ
4143 else if (type == 0x03)
4144 {
4145 /* addl */
4146 bfd_put_8 (output_bfd, 0x81,
4147 contents + rel->r_offset - 2);
4148 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4149 contents + rel->r_offset - 1);
4150 }
13ae64f3
JJ
4151 else
4152 BFD_FAIL ();
37e55690 4153 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
eb4ff4d6 4154 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ
4155 contents + rel->r_offset);
4156 else
eb4ff4d6 4157 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 4158 contents + rel->r_offset);
13ae64f3
JJ
4159 continue;
4160 }
4161 }
4162
6de2ae4a 4163 if (htab->elf.sgot == NULL)
13ae64f3
JJ
4164 abort ();
4165
4166 if (h != NULL)
67a4f2b7
AO
4167 {
4168 off = h->got.offset;
4169 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4170 }
13ae64f3
JJ
4171 else
4172 {
4173 if (local_got_offsets == NULL)
4174 abort ();
4175
4176 off = local_got_offsets[r_symndx];
67a4f2b7 4177 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ
4178 }
4179
4180 if ((off & 1) != 0)
4181 off &= ~1;
26e41594 4182 else
13ae64f3 4183 {
947216bf 4184 Elf_Internal_Rela outrel;
91d6fa6a 4185 int dr_type;
67a4f2b7 4186 asection *sreloc;
13ae64f3 4187
6de2ae4a 4188 if (htab->elf.srelgot == NULL)
13ae64f3
JJ
4189 abort ();
4190
67a4f2b7
AO
4191 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4192
4193 if (GOT_TLS_GDESC_P (tls_type))
4194 {
59d6ffb2 4195 bfd_byte *loc;
67a4f2b7
AO
4196 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4197 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L
4198 <= htab->elf.sgotplt->size);
4199 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4200 + htab->elf.sgotplt->output_offset
67a4f2b7
AO
4201 + offplt
4202 + htab->sgotplt_jump_table_size);
6de2ae4a 4203 sreloc = htab->elf.srelplt;
67a4f2b7 4204 loc = sreloc->contents;
5ae0bfb6
RS
4205 loc += (htab->next_tls_desc_index++
4206 * sizeof (Elf32_External_Rel));
67a4f2b7 4207 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 4208 <= sreloc->contents + sreloc->size);
67a4f2b7
AO
4209 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4210 if (indx == 0)
4211 {
4212 BFD_ASSERT (! unresolved_reloc);
4213 bfd_put_32 (output_bfd,
eb4ff4d6 4214 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4215 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO
4216 + htab->sgotplt_jump_table_size + 4);
4217 }
4218 else
4219 {
4220 bfd_put_32 (output_bfd, 0,
6de2ae4a 4221 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO
4222 + htab->sgotplt_jump_table_size + 4);
4223 }
4224 }
4225
6de2ae4a 4226 sreloc = htab->elf.srelgot;
67a4f2b7 4227
6de2ae4a
L
4228 outrel.r_offset = (htab->elf.sgot->output_section->vma
4229 + htab->elf.sgot->output_offset + off);
13ae64f3 4230
67a4f2b7 4231 if (GOT_TLS_GD_P (tls_type))
13ae64f3 4232 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO
4233 else if (GOT_TLS_GDESC_P (tls_type))
4234 goto dr_done;
37e55690
JJ
4235 else if (tls_type == GOT_TLS_IE_POS)
4236 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ
4237 else
4238 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 4239
37e55690 4240 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6
L
4241 bfd_put_32 (output_bfd,
4242 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4243 htab->elf.sgot->contents + off);
37e55690 4244 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 4245 bfd_put_32 (output_bfd,
eb4ff4d6 4246 elf_i386_dtpoff_base (info) - relocation,
6de2ae4a 4247 htab->elf.sgot->contents + off);
67a4f2b7 4248 else if (dr_type != R_386_TLS_DESC)
c366c25e 4249 bfd_put_32 (output_bfd, 0,
6de2ae4a 4250 htab->elf.sgot->contents + off);
13ae64f3 4251 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 4252
59d6ffb2 4253 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 4254
67a4f2b7 4255 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ
4256 {
4257 if (indx == 0)
4258 {
82e51918 4259 BFD_ASSERT (! unresolved_reloc);
13ae64f3 4260 bfd_put_32 (output_bfd,
eb4ff4d6 4261 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4262 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ
4263 }
4264 else
4265 {
4266 bfd_put_32 (output_bfd, 0,
6de2ae4a 4267 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ
4268 outrel.r_info = ELF32_R_INFO (indx,
4269 R_386_TLS_DTPOFF32);
4270 outrel.r_offset += 4;
59d6ffb2 4271 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ
4272 }
4273 }
37e55690
JJ
4274 else if (tls_type == GOT_TLS_IE_BOTH)
4275 {
4276 bfd_put_32 (output_bfd,
eb4ff4d6
L
4277 (indx == 0
4278 ? relocation - elf_i386_dtpoff_base (info)
4279 : 0),
6de2ae4a 4280 htab->elf.sgot->contents + off + 4);
37e55690
JJ
4281 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4282 outrel.r_offset += 4;
59d6ffb2 4283 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 4284 }
13ae64f3 4285
67a4f2b7 4286 dr_done:
13ae64f3
JJ
4287 if (h != NULL)
4288 h->got.offset |= 1;
4289 else
4290 local_got_offsets[r_symndx] |= 1;
4291 }
4292
67a4f2b7
AO
4293 if (off >= (bfd_vma) -2
4294 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 4295 abort ();
67a4f2b7
AO
4296 if (r_type == R_386_TLS_GOTDESC
4297 || r_type == R_386_TLS_DESC_CALL)
4298 {
4299 relocation = htab->sgotplt_jump_table_size + offplt;
4300 unresolved_reloc = FALSE;
4301 }
4302 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 4303 {
6de2ae4a
L
4304 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4305 + htab->elf.sgotplt->output_offset;
4306 relocation = htab->elf.sgot->output_section->vma
4307 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ
4308 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4309 && tls_type == GOT_TLS_IE_BOTH)
4310 relocation += 4;
4311 if (r_type == R_386_TLS_IE)
8c37241b 4312 relocation += g_o_t;
b34976b6 4313 unresolved_reloc = FALSE;
13ae64f3 4314 }
67a4f2b7 4315 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ
4316 {
4317 unsigned int val, type;
4318 bfd_vma roff;
4319
4320 /* GD->IE transition. */
13ae64f3 4321 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ
4322 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4323 if (type == 0x04)
4324 {
4325 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4326 Change it into:
4327 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3 4328 val >>= 3;
142411ca 4329 roff = rel->r_offset - 3;
13ae64f3
JJ
4330 }
4331 else
4332 {
4333 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4334 Change it into:
4335 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ
4336 roff = rel->r_offset - 2;
4337 }
4338 memcpy (contents + roff,
4339 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4340 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ
4341 /* If foo is used only with foo@gotntpoff(%reg) and
4342 foo@indntpoff, but not with foo@gottpoff(%reg), change
4343 subl $foo@gottpoff(%reg), %eax
4344 into:
4345 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ
4346 if (tls_type == GOT_TLS_IE_POS)
4347 contents[roff + 6] = 0x03;
8c37241b 4348 bfd_put_32 (output_bfd,
6de2ae4a
L
4349 htab->elf.sgot->output_section->vma
4350 + htab->elf.sgot->output_offset + off
4351 - htab->elf.sgotplt->output_section->vma
4352 - htab->elf.sgotplt->output_offset,
13ae64f3
JJ
4353 contents + roff + 8);
4354 /* Skip R_386_PLT32. */
4355 rel++;
4356 continue;
4357 }
67a4f2b7
AO
4358 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4359 {
4360 /* GDesc -> IE transition.
4361 It's originally something like:
4362 leal x@tlsdesc(%ebx), %eax
4363
4364 Change it to:
142411ca 4365 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO
4366 or:
4367 movl x@gottpoff(%ebx), %eax # before negl %eax
4368
4369 Registers other than %eax may be set up here. */
4370
67a4f2b7
AO
4371 bfd_vma roff;
4372
4373 /* First, make sure it's a leal adding ebx to a 32-bit
4374 offset into any register, although it's probably
4375 almost always going to be eax. */
4376 roff = rel->r_offset;
67a4f2b7
AO
4377
4378 /* Now modify the instruction as appropriate. */
4379 /* To turn a leal into a movl in the form we use it, it
4380 suffices to change the first byte from 0x8d to 0x8b.
4381 aoliva FIXME: should we decide to keep the leal, all
4382 we have to do is remove the statement below, and
4383 adjust the relaxation of R_386_TLS_DESC_CALL. */
4384 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4385
4386 if (tls_type == GOT_TLS_IE_BOTH)
4387 off += 4;
4388
4389 bfd_put_32 (output_bfd,
6de2ae4a
L
4390 htab->elf.sgot->output_section->vma
4391 + htab->elf.sgot->output_offset + off
4392 - htab->elf.sgotplt->output_section->vma
4393 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO
4394 contents + roff);
4395 continue;
4396 }
4397 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4398 {
4399 /* GDesc -> IE transition.
4400 It's originally:
4401 call *(%eax)
4402
4403 Change it to:
142411ca 4404 xchg %ax,%ax
67a4f2b7
AO
4405 or
4406 negl %eax
4407 depending on how we transformed the TLS_GOTDESC above.
4408 */
4409
67a4f2b7
AO
4410 bfd_vma roff;
4411
67a4f2b7 4412 roff = rel->r_offset;
67a4f2b7
AO
4413
4414 /* Now modify the instruction as appropriate. */
4415 if (tls_type != GOT_TLS_IE_NEG)
4416 {
10efb593
L
4417 /* xchg %ax,%ax */
4418 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO
4419 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4420 }
4421 else
4422 {
4423 /* negl %eax */
4424 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4425 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4426 }
4427
4428 continue;
4429 }
4430 else
4431 BFD_ASSERT (FALSE);
13ae64f3
JJ
4432 break;
4433
4434 case R_386_TLS_LDM:
142411ca
L
4435 if (! elf_i386_tls_transition (info, input_bfd,
4436 input_section, contents,
4437 symtab_hdr, sym_hashes,
4438 &r_type, GOT_UNKNOWN, rel,
4c544807 4439 relend, h, r_symndx))
142411ca 4440 return FALSE;
13ae64f3 4441
142411ca
L
4442 if (r_type != R_386_TLS_LDM)
4443 {
13ae64f3 4444 /* LD->LE transition:
13ae64f3
JJ
4445 leal foo(%reg), %eax; call ___tls_get_addr.
4446 We change it into:
4447 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
142411ca 4448 BFD_ASSERT (r_type == R_386_TLS_LE_32);
13ae64f3
JJ
4449 memcpy (contents + rel->r_offset - 2,
4450 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 4451 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3
JJ
4452 rel++;
4453 continue;
4454 }
4455
6de2ae4a 4456 if (htab->elf.sgot == NULL)
13ae64f3
JJ
4457 abort ();
4458
4459 off = htab->tls_ldm_got.offset;
4460 if (off & 1)
4461 off &= ~1;
4462 else
4463 {
947216bf 4464 Elf_Internal_Rela outrel;
13ae64f3 4465
6de2ae4a 4466 if (htab->elf.srelgot == NULL)
13ae64f3
JJ
4467 abort ();
4468
6de2ae4a
L
4469 outrel.r_offset = (htab->elf.sgot->output_section->vma
4470 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ
4471
4472 bfd_put_32 (output_bfd, 0,
6de2ae4a 4473 htab->elf.sgot->contents + off);
13ae64f3 4474 bfd_put_32 (output_bfd, 0,
6de2ae4a 4475 htab->elf.sgot->contents + off + 4);
13ae64f3 4476 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 4477 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
13ae64f3
JJ
4478 htab->tls_ldm_got.offset |= 1;
4479 }
6de2ae4a
L
4480 relocation = htab->elf.sgot->output_section->vma
4481 + htab->elf.sgot->output_offset + off
4482 - htab->elf.sgotplt->output_section->vma
4483 - htab->elf.sgotplt->output_offset;
b34976b6 4484 unresolved_reloc = FALSE;
13ae64f3
JJ
4485 break;
4486
4487 case R_386_TLS_LDO_32:
959b0961 4488 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
eb4ff4d6 4489 relocation -= elf_i386_dtpoff_base (info);
13ae64f3
JJ
4490 else
4491 /* When converting LDO to LE, we must negate. */
eb4ff4d6 4492 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ
4493 break;
4494
4495 case R_386_TLS_LE_32:
13ae64f3 4496 case R_386_TLS_LE:
1d85728f 4497 if (!info->executable)
37e55690 4498 {
947216bf 4499 Elf_Internal_Rela outrel;
37e55690 4500 asection *sreloc;
37e55690
JJ
4501
4502 outrel.r_offset = rel->r_offset
4503 + input_section->output_section->vma
4504 + input_section->output_offset;
4505 if (h != NULL && h->dynindx != -1)
4506 indx = h->dynindx;
4507 else
4508 indx = 0;
4509 if (r_type == R_386_TLS_LE_32)
4510 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4511 else
4512 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4513 sreloc = elf_section_data (input_section)->sreloc;
4514 if (sreloc == NULL)
4515 abort ();
59d6ffb2 4516 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ
4517 if (indx)
4518 continue;
4519 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4520 relocation = elf_i386_dtpoff_base (info) - relocation;
37e55690 4521 else
eb4ff4d6 4522 relocation -= elf_i386_dtpoff_base (info);
37e55690
JJ
4523 }
4524 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4525 relocation = elf_i386_tpoff (info, relocation);
37e55690 4526 else
eb4ff4d6 4527 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ
4528 break;
4529
252b5132
RH
4530 default:
4531 break;
4532 }
4533
239e1f3a
AM
4534 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4535 because such sections are not SEC_ALLOC and thus ld.so will
4536 not process them. */
8c694914 4537 if (unresolved_reloc
239e1f3a 4538 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM
4539 && h->def_dynamic)
4540 && _bfd_elf_section_offset (output_bfd, info, input_section,
4541 rel->r_offset) != (bfd_vma) -1)
6a30718d
JJ
4542 {
4543 (*_bfd_error_handler)
843fe662 4544 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM
4545 input_bfd,
4546 input_section,
6a30718d 4547 (long) rel->r_offset,
843fe662 4548 howto->name,
6a30718d 4549 h->root.root.string);
b34976b6 4550 return FALSE;
6a30718d 4551 }
83be169b 4552
cbe950e9 4553do_relocation:
252b5132
RH
4554 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4555 contents, rel->r_offset,
55fd94b0 4556 relocation, 0);
252b5132 4557
62d78908 4558check_relocation_error:
cf5c0c5b 4559 if (r != bfd_reloc_ok)
252b5132 4560 {
cf5c0c5b 4561 const char *name;
ffb2e45b 4562
cf5c0c5b
AM
4563 if (h != NULL)
4564 name = h->root.root.string;
4565 else
4566 {
4567 name = bfd_elf_string_from_elf_section (input_bfd,
4568 symtab_hdr->sh_link,
4569 sym->st_name);
4570 if (name == NULL)
b34976b6 4571 return FALSE;
cf5c0c5b
AM
4572 if (*name == '\0')
4573 name = bfd_section_name (input_bfd, sec);
4574 }
ffb2e45b 4575
cf5c0c5b
AM
4576 if (r == bfd_reloc_overflow)
4577 {
cf5c0c5b 4578 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L
4579 (info, (h ? &h->root : NULL), name, howto->name,
4580 (bfd_vma) 0, input_bfd, input_section,
4581 rel->r_offset)))
b34976b6 4582 return FALSE;
cf5c0c5b
AM
4583 }
4584 else
4585 {
4586 (*_bfd_error_handler)
d003868e
AM
4587 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4588 input_bfd, input_section,
cf5c0c5b 4589 (long) rel->r_offset, name, (int) r);
b34976b6 4590 return FALSE;
cf5c0c5b 4591 }
252b5132
RH
4592 }
4593 }
4594
b34976b6 4595 return TRUE;
252b5132
RH
4596}
4597
4598/* Finish up dynamic symbol handling. We set the contents of various
4599 dynamic sections here. */
4600
b34976b6 4601static bfd_boolean
55fd94b0
AM
4602elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4603 struct bfd_link_info *info,
4604 struct elf_link_hash_entry *h,
4605 Elf_Internal_Sym *sym)
252b5132 4606{
6725bdbf 4607 struct elf_i386_link_hash_table *htab;
25e762b9
RM
4608 unsigned plt_entry_size;
4609 const struct elf_i386_backend_data *abed;
dd7e64d4 4610 struct elf_i386_link_hash_entry *eh;
252b5132 4611
6725bdbf 4612 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
4613 if (htab == NULL)
4614 return FALSE;
252b5132 4615
25e762b9
RM
4616 abed = get_elf_i386_backend_data (output_bfd);
4617 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4618
dd7e64d4
L
4619 eh = (struct elf_i386_link_hash_entry *) h;
4620
252b5132
RH
4621 if (h->plt.offset != (bfd_vma) -1)
4622 {
252b5132
RH
4623 bfd_vma plt_index;
4624 bfd_vma got_offset;
947216bf
AM
4625 Elf_Internal_Rela rel;
4626 bfd_byte *loc;
cbe950e9
L
4627 asection *plt, *gotplt, *relplt;
4628
4629 /* When building a static executable, use .iplt, .igot.plt and
4630 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4631 if (htab->elf.splt != NULL)
cbe950e9 4632 {
6de2ae4a
L
4633 plt = htab->elf.splt;
4634 gotplt = htab->elf.sgotplt;
4635 relplt = htab->elf.srelplt;
cbe950e9
L
4636 }
4637 else
4638 {
6de2ae4a
L
4639 plt = htab->elf.iplt;
4640 gotplt = htab->elf.igotplt;
4641 relplt = htab->elf.irelplt;
cbe950e9 4642 }
252b5132
RH
4643
4644 /* This symbol has an entry in the procedure linkage table. Set
4645 it up. */
4646
cbe950e9
L
4647 if ((h->dynindx == -1
4648 && !((h->forced_local || info->executable)
4649 && h->def_regular
4650 && h->type == STT_GNU_IFUNC))
4651 || plt == NULL
4652 || gotplt == NULL
4653 || relplt == NULL)
cec7f46a 4654 abort ();
252b5132
RH
4655
4656 /* Get the index in the procedure linkage table which
4657 corresponds to this symbol. This is the index of this symbol
4658 in all the symbols for which we are making plt entries. The
cbe950e9 4659 first entry in the procedure linkage table is reserved.
252b5132 4660
cbe950e9 4661 Get the offset into the .got table of the entry that
252b5132 4662 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 4663 The first three are reserved.
6bbec505 4664
cbe950e9
L
4665 For static executables, we don't reserve anything. */
4666
6de2ae4a 4667 if (plt == htab->elf.splt)
cbe950e9 4668 {
e1f98742
L
4669 got_offset = h->plt.offset / plt_entry_size - 1;
4670 got_offset = (got_offset + 3) * 4;
cbe950e9
L
4671 }
4672 else
4673 {
e1f98742
L
4674 got_offset = h->plt.offset / plt_entry_size;
4675 got_offset = got_offset * 4;
cbe950e9 4676 }
252b5132
RH
4677
4678 /* Fill in the entry in the procedure linkage table. */
4679 if (! info->shared)
4680 {
25e762b9
RM
4681 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4682 abed->plt->plt_entry_size);
252b5132 4683 bfd_put_32 (output_bfd,
cbe950e9
L
4684 (gotplt->output_section->vma
4685 + gotplt->output_offset
252b5132 4686 + got_offset),
25e762b9
RM
4687 plt->contents + h->plt.offset
4688 + abed->plt->plt_got_offset);
eac338cf 4689
25e762b9 4690 if (abed->is_vxworks)
eac338cf
PB
4691 {
4692 int s, k, reloc_index;
4693
4694 /* Create the R_386_32 relocation referencing the GOT
4695 for this PLT entry. */
4696
4697 /* S: Current slot number (zero-based). */
25e762b9
RM
4698 s = ((h->plt.offset - abed->plt->plt_entry_size)
4699 / abed->plt->plt_entry_size);
eac338cf
PB
4700 /* K: Number of relocations for PLTResolve. */
4701 if (info->shared)
4702 k = PLTRESOLVE_RELOCS_SHLIB;
4703 else
4704 k = PLTRESOLVE_RELOCS;
4705 /* Skip the PLTresolve relocations, and the relocations for
4706 the other PLT slots. */
4707 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4708 loc = (htab->srelplt2->contents + reloc_index
4709 * sizeof (Elf32_External_Rel));
4710
6de2ae4a
L
4711 rel.r_offset = (htab->elf.splt->output_section->vma
4712 + htab->elf.splt->output_offset
eac338cf 4713 + h->plt.offset + 2),
7325306f 4714 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB
4715 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4716
4717 /* Create the R_386_32 relocation referencing the beginning of
4718 the PLT for this GOT entry. */
6de2ae4a
L
4719 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4720 + htab->elf.sgotplt->output_offset
eac338cf 4721 + got_offset);
7325306f 4722 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 4723 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 4724 loc + sizeof (Elf32_External_Rel));
eac338cf 4725 }
252b5132
RH
4726 }
4727 else
4728 {
25e762b9
RM
4729 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4730 abed->plt->plt_entry_size);
252b5132 4731 bfd_put_32 (output_bfd, got_offset,
25e762b9
RM
4732 plt->contents + h->plt.offset
4733 + abed->plt->plt_got_offset);
252b5132
RH
4734 }
4735
252b5132
RH
4736 /* Fill in the entry in the global offset table. */
4737 bfd_put_32 (output_bfd,
cbe950e9
L
4738 (plt->output_section->vma
4739 + plt->output_offset
252b5132 4740 + h->plt.offset
25e762b9 4741 + abed->plt->plt_lazy_offset),
cbe950e9 4742 gotplt->contents + got_offset);
252b5132
RH
4743
4744 /* Fill in the entry in the .rel.plt section. */
cbe950e9
L
4745 rel.r_offset = (gotplt->output_section->vma
4746 + gotplt->output_offset
252b5132 4747 + got_offset);
cbe950e9
L
4748 if (h->dynindx == -1
4749 || ((info->executable
4750 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4751 && h->def_regular
4752 && h->type == STT_GNU_IFUNC))
4753 {
4754 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4755 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4756 in the .got.plt section. */
4757 bfd_put_32 (output_bfd,
23209a78 4758 (h->root.u.def.value
cbe950e9
L
4759 + h->root.u.def.section->output_section->vma
4760 + h->root.u.def.section->output_offset),
4761 gotplt->contents + got_offset);
4762 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
e1f98742
L
4763 /* R_386_IRELATIVE comes last. */
4764 plt_index = htab->next_irelative_index--;
cbe950e9
L
4765 }
4766 else
e1f98742
L
4767 {
4768 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4769 plt_index = htab->next_jump_slot_index++;
4770 }
cbe950e9 4771 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
0ac8d2ca 4772 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132 4773
e1f98742
L
4774 /* Don't fill PLT entry for static executables. */
4775 if (plt == htab->elf.splt)
4776 {
4777 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4778 plt->contents + h->plt.offset
4779 + abed->plt->plt_reloc_offset);
4780 bfd_put_32 (output_bfd, - (h->plt.offset
4781 + abed->plt->plt_plt_offset + 4),
4782 plt->contents + h->plt.offset
4783 + abed->plt->plt_plt_offset);
4784 }
dd7e64d4
L
4785 }
4786 else if (eh->plt_got.offset != (bfd_vma) -1)
4787 {
4788 bfd_vma got_offset, plt_offset;
4789 asection *plt, *got, *gotplt;
4790 const bfd_byte *got_plt_entry;
4791
4792 /* Offset of displacement of the indirect jump. */
4793 bfd_vma plt_got_offset = 2;
e1f98742 4794
dd7e64d4
L
4795 /* Set the entry in the GOT procedure linkage table. */
4796 plt = htab->plt_got;
4797 got = htab->elf.sgot;
4798 gotplt = htab->elf.sgotplt;
4799 got_offset = h->got.offset;
4800
4801 if (got_offset == (bfd_vma) -1
4802 || plt == NULL
4803 || got == NULL
4804 || gotplt == NULL)
4805 abort ();
4806
4807 /* Fill in the entry in the GOT procedure linkage table. */
4808 if (! info->shared)
252b5132 4809 {
dd7e64d4
L
4810 got_plt_entry = elf_i386_got_plt_entry;
4811 got_offset += got->output_section->vma + got->output_offset;
252b5132 4812 }
dd7e64d4
L
4813 else
4814 {
4815 got_plt_entry = elf_i386_pic_got_plt_entry;
4816 got_offset += (got->output_section->vma
4817 + got->output_offset
4818 - gotplt->output_section->vma
4819 - gotplt->output_offset);
4820 }
4821
4822 plt_offset = eh->plt_got.offset;
4823 memcpy (plt->contents + plt_offset, got_plt_entry,
4824 sizeof (elf_i386_got_plt_entry));
4825 bfd_put_32 (output_bfd, got_offset,
4826 plt->contents + plt_offset + plt_got_offset);
4827 }
4828
4829 if (!h->def_regular
4830 && (h->plt.offset != (bfd_vma) -1
4831 || eh->plt_got.offset != (bfd_vma) -1))
4832 {
4833 /* Mark the symbol as undefined, rather than as defined in
4834 the .plt section. Leave the value if there were any
4835 relocations where pointer equality matters (this is a clue
4836 for the dynamic linker, to make function pointer
4837 comparisons work between an application and shared
4838 library), otherwise set it to zero. If a function is only
4839 called from a binary, there is no need to slow down
4840 shared libraries because of that. */
4841 sym->st_shndx = SHN_UNDEF;
4842 if (!h->pointer_equality_needed)
4843 sym->st_value = 0;
252b5132
RH
4844 }
4845
13ae64f3 4846 if (h->got.offset != (bfd_vma) -1
67a4f2b7 4847 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
37e55690 4848 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
252b5132 4849 {
947216bf 4850 Elf_Internal_Rela rel;
252b5132
RH
4851
4852 /* This symbol has an entry in the global offset table. Set it
4853 up. */
4854
6de2ae4a 4855 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 4856 abort ();
252b5132 4857
6de2ae4a
L
4858 rel.r_offset = (htab->elf.sgot->output_section->vma
4859 + htab->elf.sgot->output_offset
dc810e39 4860 + (h->got.offset & ~(bfd_vma) 1));
252b5132 4861
dd5724d5
AM
4862 /* If this is a static link, or it is a -Bsymbolic link and the
4863 symbol is defined locally or was forced to be local because
4864 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH
4865 The entry in the global offset table will already have been
4866 initialized in the relocate_section function. */
710ab287 4867 if (h->def_regular
0018b0a3
L
4868 && h->type == STT_GNU_IFUNC)
4869 {
710ab287
L
4870 if (info->shared)
4871 {
4872 /* Generate R_386_GLOB_DAT. */
4873 goto do_glob_dat;
4874 }
4875 else
4876 {
cd2b2c10
L
4877 asection *plt;
4878
710ab287
L
4879 if (!h->pointer_equality_needed)
4880 abort ();
4881
4882 /* For non-shared object, we can't use .got.plt, which
4883 contains the real function addres if we need pointer
4884 equality. We load the GOT entry with the PLT entry. */
cd2b2c10 4885 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L
4886 bfd_put_32 (output_bfd,
4887 (plt->output_section->vma
4888 + plt->output_offset + h->plt.offset),
6de2ae4a 4889 htab->elf.sgot->contents + h->got.offset);
710ab287
L
4890 return TRUE;
4891 }
0018b0a3
L
4892 }
4893 else if (info->shared
4894 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 4895 {
6725bdbf 4896 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM
4897 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4898 }
252b5132
RH
4899 else
4900 {
dd5724d5 4901 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4902do_glob_dat:
6725bdbf 4903 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 4904 htab->elf.sgot->contents + h->got.offset);
252b5132
RH
4905 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4906 }
4907
59d6ffb2 4908 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
252b5132
RH
4909 }
4910
f5385ebf 4911 if (h->needs_copy)
252b5132 4912 {
947216bf 4913 Elf_Internal_Rela rel;
252b5132
RH
4914
4915 /* This symbol needs a copy reloc. Set it up. */
4916
ffb2e45b
AM
4917 if (h->dynindx == -1
4918 || (h->root.type != bfd_link_hash_defined
4919 && h->root.type != bfd_link_hash_defweak)
4920 || htab->srelbss == NULL)
4921 abort ();
252b5132
RH
4922
4923 rel.r_offset = (h->root.u.def.value
4924 + h->root.u.def.section->output_section->vma
4925 + h->root.u.def.section->output_offset);
4926 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
59d6ffb2 4927 elf_append_rel (output_bfd, htab->srelbss, &rel);
252b5132
RH
4928 }
4929
b34976b6 4930 return TRUE;
252b5132
RH
4931}
4932
c25bc9fc
L
4933/* Finish up local dynamic symbol handling. We set the contents of
4934 various dynamic sections here. */
4935
4936static bfd_boolean
4937elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4938{
4939 struct elf_link_hash_entry *h
4940 = (struct elf_link_hash_entry *) *slot;
4941 struct bfd_link_info *info
23209a78 4942 = (struct bfd_link_info *) inf;
c25bc9fc
L
4943
4944 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4945 h, NULL);
4946}
4947
38701953
AM
4948/* Used to decide how to sort relocs in an optimal manner for the
4949 dynamic linker, before writing them out. */
4950
4951static enum elf_reloc_type_class
7e612e98
AM
4952elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4953 const asection *rel_sec ATTRIBUTE_UNUSED,
4954 const Elf_Internal_Rela *rela)
38701953 4955{
55fd94b0 4956 switch (ELF32_R_TYPE (rela->r_info))
38701953
AM
4957 {
4958 case R_386_RELATIVE:
4959 return reloc_class_relative;
4960 case R_386_JUMP_SLOT:
4961 return reloc_class_plt;
4962 case R_386_COPY:
4963 return reloc_class_copy;
4964 default:
4965 return reloc_class_normal;
4966 }
4967}
4968
252b5132
RH
4969/* Finish up the dynamic sections. */
4970
b34976b6 4971static bfd_boolean
55fd94b0
AM
4972elf_i386_finish_dynamic_sections (bfd *output_bfd,
4973 struct bfd_link_info *info)
252b5132 4974{
6725bdbf 4975 struct elf_i386_link_hash_table *htab;
252b5132 4976 bfd *dynobj;
252b5132 4977 asection *sdyn;
25e762b9 4978 const struct elf_i386_backend_data *abed;
252b5132 4979
6725bdbf 4980 htab = elf_i386_hash_table (info);
4dfe6ac6
NC
4981 if (htab == NULL)
4982 return FALSE;
4983
ebe50bae 4984 dynobj = htab->elf.dynobj;
3d4d4302 4985 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
25e762b9 4986 abed = get_elf_i386_backend_data (output_bfd);
252b5132 4987
ebe50bae 4988 if (htab->elf.dynamic_sections_created)
252b5132 4989 {
252b5132
RH
4990 Elf32_External_Dyn *dyncon, *dynconend;
4991
6de2ae4a 4992 if (sdyn == NULL || htab->elf.sgot == NULL)
ffb2e45b 4993 abort ();
252b5132
RH
4994
4995 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 4996 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH
4997 for (; dyncon < dynconend; dyncon++)
4998 {
4999 Elf_Internal_Dyn dyn;
51b64d56 5000 asection *s;
252b5132
RH
5001
5002 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5003
5004 switch (dyn.d_tag)
5005 {
5006 default:
25e762b9
RM
5007 if (abed->is_vxworks
5008 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7a2b07ff 5009 break;
0ac8d2ca 5010 continue;
252b5132
RH
5011
5012 case DT_PLTGOT:
6de2ae4a 5013 s = htab->elf.sgotplt;
8c37241b 5014 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM
5015 break;
5016
252b5132 5017 case DT_JMPREL:
6de2ae4a 5018 s = htab->elf.srelplt;
6348e046 5019 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH
5020 break;
5021
5022 case DT_PLTRELSZ:
6de2ae4a 5023 s = htab->elf.srelplt;
eea6121a 5024 dyn.d_un.d_val = s->size;
252b5132
RH
5025 break;
5026
5027 case DT_RELSZ:
5028 /* My reading of the SVR4 ABI indicates that the
5029 procedure linkage table relocs (DT_JMPREL) should be
5030 included in the overall relocs (DT_REL). This is
5031 what Solaris does. However, UnixWare can not handle
5032 that case. Therefore, we override the DT_RELSZ entry
6348e046 5033 here to make it not include the JMPREL relocs. */
6de2ae4a 5034 s = htab->elf.srelplt;
6348e046
AM
5035 if (s == NULL)
5036 continue;
eea6121a 5037 dyn.d_un.d_val -= s->size;
6348e046
AM
5038 break;
5039
5040 case DT_REL:
5041 /* We may not be using the standard ELF linker script.
5042 If .rel.plt is the first .rel section, we adjust
5043 DT_REL to not include it. */
6de2ae4a 5044 s = htab->elf.srelplt;
6348e046
AM
5045 if (s == NULL)
5046 continue;
5047 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5048 continue;
eea6121a 5049 dyn.d_un.d_ptr += s->size;
252b5132
RH
5050 break;
5051 }
0ac8d2ca
AM
5052
5053 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH
5054 }
5055
5056 /* Fill in the first entry in the procedure linkage table. */
6de2ae4a 5057 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132
RH
5058 {
5059 if (info->shared)
eac338cf 5060 {
25e762b9
RM
5061 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5062 abed->plt->plt0_entry_size);
5063 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5064 abed->plt0_pad_byte,
5065 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
eac338cf 5066 }
252b5132
RH
5067 else
5068 {
25e762b9
RM
5069 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5070 abed->plt->plt0_entry_size);
5071 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5072 abed->plt0_pad_byte,
5073 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
252b5132 5074 bfd_put_32 (output_bfd,
6de2ae4a
L
5075 (htab->elf.sgotplt->output_section->vma
5076 + htab->elf.sgotplt->output_offset
6725bdbf 5077 + 4),
25e762b9
RM
5078 htab->elf.splt->contents
5079 + abed->plt->plt0_got1_offset);
252b5132 5080 bfd_put_32 (output_bfd,
6de2ae4a
L
5081 (htab->elf.sgotplt->output_section->vma
5082 + htab->elf.sgotplt->output_offset
6725bdbf 5083 + 8),
25e762b9
RM
5084 htab->elf.splt->contents
5085 + abed->plt->plt0_got2_offset);
eac338cf 5086
25e762b9 5087 if (abed->is_vxworks)
eac338cf
PB
5088 {
5089 Elf_Internal_Rela rel;
7325306f 5090
eac338cf
PB
5091 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5092 On IA32 we use REL relocations so the addend goes in
5093 the PLT directly. */
6de2ae4a
L
5094 rel.r_offset = (htab->elf.splt->output_section->vma
5095 + htab->elf.splt->output_offset
25e762b9 5096 + abed->plt->plt0_got1_offset);
7325306f 5097 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB
5098 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5099 htab->srelplt2->contents);
5100 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
6de2ae4a
L
5101 rel.r_offset = (htab->elf.splt->output_section->vma
5102 + htab->elf.splt->output_offset
25e762b9 5103 + abed->plt->plt0_got2_offset);
7325306f 5104 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB
5105 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5106 htab->srelplt2->contents +
5107 sizeof (Elf32_External_Rel));
5108 }
252b5132
RH
5109 }
5110
5111 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5112 really seem like the right value. */
6de2ae4a 5113 elf_section_data (htab->elf.splt->output_section)
6725bdbf 5114 ->this_hdr.sh_entsize = 4;
eac338cf
PB
5115
5116 /* Correct the .rel.plt.unloaded relocations. */
25e762b9 5117 if (abed->is_vxworks && !info->shared)
eac338cf 5118 {
25e762b9
RM
5119 int num_plts = (htab->elf.splt->size
5120 / abed->plt->plt_entry_size) - 1;
4c9b0de6 5121 unsigned char *p;
eac338cf
PB
5122
5123 p = htab->srelplt2->contents;
5124 if (info->shared)
5125 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5126 else
5127 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5128
5129 for (; num_plts; num_plts--)
5130 {
5131 Elf_Internal_Rela rel;
5132 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 5133 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB
5134 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5135 p += sizeof (Elf32_External_Rel);
5136
5137 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 5138 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf
PB
5139 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5140 p += sizeof (Elf32_External_Rel);
5141 }
5142 }
252b5132
RH
5143 }
5144 }
5145
6de2ae4a 5146 if (htab->elf.sgotplt)
252b5132 5147 {
56d4289c
L
5148 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5149 {
5150 (*_bfd_error_handler)
5151 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5152 return FALSE;
5153 }
5154
12d0ee4a 5155 /* Fill in the first three entries in the global offset table. */
6de2ae4a 5156 if (htab->elf.sgotplt->size > 0)
12d0ee4a
AM
5157 {
5158 bfd_put_32 (output_bfd,
55fd94b0 5159 (sdyn == NULL ? 0
12d0ee4a 5160 : sdyn->output_section->vma + sdyn->output_offset),
6de2ae4a
L
5161 htab->elf.sgotplt->contents);
5162 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5163 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
12d0ee4a 5164 }
252b5132 5165
6de2ae4a 5166 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
12d0ee4a 5167 }
8c37241b 5168
e41b3a13 5169 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM
5170 if (htab->plt_eh_frame != NULL
5171 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ
5172 {
5173 if (htab->elf.splt != NULL
5174 && htab->elf.splt->size != 0
5175 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5176 && htab->elf.splt->output_section != NULL
5177 && htab->plt_eh_frame->output_section != NULL)
5178 {
5179 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5180 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5181 + htab->plt_eh_frame->output_offset
5182 + PLT_FDE_START_OFFSET;
5183 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5184 htab->plt_eh_frame->contents
5185 + PLT_FDE_START_OFFSET);
5186 }
5187 if (htab->plt_eh_frame->sec_info_type
dbaa2011 5188 == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ
5189 {
5190 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5191 htab->plt_eh_frame,
5192 htab->plt_eh_frame->contents))
5193 return FALSE;
5194 }
5195 }
5196
6de2ae4a
L
5197 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5198 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
8c37241b 5199
c25bc9fc
L
5200 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5201 htab_traverse (htab->loc_hash_table,
5202 elf_i386_finish_local_dynamic_symbol,
5203 info);
5204
b34976b6 5205 return TRUE;
252b5132
RH
5206}
5207
3972882e 5208/* Return an array of PLT entry symbol values. */
4c45e5c9 5209
3972882e
L
5210static bfd_vma *
5211elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5212 asection *relplt)
4c45e5c9 5213{
3972882e
L
5214 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5215 arelent *p;
5216 long count, i;
5217 bfd_vma *plt_sym_val;
144bed8d 5218 bfd_vma plt_offset;
3972882e
L
5219 bfd_byte *plt_contents;
5220 const struct elf_i386_backend_data *bed
5221 = get_elf_i386_backend_data (abfd);
5222 Elf_Internal_Shdr *hdr;
5223
5224 /* Get the .plt section contents. */
5225 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5226 if (plt_contents == NULL)
5227 return NULL;
5228 if (!bfd_get_section_contents (abfd, (asection *) plt,
5229 plt_contents, 0, plt->size))
5230 {
5231bad_return:
5232 free (plt_contents);
5233 return NULL;
5234 }
144bed8d 5235
3972882e
L
5236 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5237 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5238 goto bad_return;
144bed8d 5239
3972882e
L
5240 hdr = &elf_section_data (relplt)->this_hdr;
5241 count = relplt->size / hdr->sh_entsize;
5242
5243 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5244 if (plt_sym_val == NULL)
5245 goto bad_return;
cca5b8b6 5246
35181b3e 5247 for (i = 0; i < count; i++)
3972882e 5248 plt_sym_val[i] = -1;
cca5b8b6 5249
3972882e
L
5250 plt_offset = bed->plt->plt_entry_size;
5251 p = relplt->relocation;
5252 for (i = 0; i < count; i++, p++)
144bed8d 5253 {
3972882e
L
5254 long reloc_index;
5255
6f25f223 5256 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
533d0af0 5257 if (p->howto == NULL)
6f25f223 5258 continue;
533d0af0
L
5259
5260 if (p->howto->type != R_386_JUMP_SLOT
5261 && p->howto->type != R_386_IRELATIVE)
3972882e
L
5262 continue;
5263
5264 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5265 + bed->plt->plt_reloc_offset));
5266 reloc_index /= sizeof (Elf32_External_Rel);
5267 if (reloc_index >= count)
5268 abort ();
5269 plt_sym_val[reloc_index] = plt->vma + plt_offset;
144bed8d 5270 plt_offset += bed->plt->plt_entry_size;
fca6ae69
L
5271
5272 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5273 section. */
5274 if (plt_offset >= plt->size)
5275 break;
144bed8d
L
5276 }
5277
3972882e
L
5278 free (plt_contents);
5279
5280 return plt_sym_val;
5281}
5282
5283/* Similar to _bfd_elf_get_synthetic_symtab. */
5284
5285static long
5286elf_i386_get_synthetic_symtab (bfd *abfd,
5287 long symcount,
5288 asymbol **syms,
5289 long dynsymcount,
5290 asymbol **dynsyms,
5291 asymbol **ret)
5292{
5293 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5294 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5295 dynsymcount, dynsyms, ret,
5296 plt,
5297 elf_i386_get_plt_sym_val);
4c45e5c9
JJ
5298}
5299
fdc90cb4
JJ
5300/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5301
5302static bfd_boolean
5303elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5304{
5305 if (h->plt.offset != (bfd_vma) -1
5306 && !h->def_regular
5307 && !h->pointer_equality_needed)
5308 return FALSE;
5309
5310 return _bfd_elf_hash_symbol (h);
5311}
4c45e5c9 5312
d8045f23
NC
5313/* Hook called by the linker routine which adds symbols from an object
5314 file. */
5315
5316static bfd_boolean
c16153ae 5317elf_i386_add_symbol_hook (bfd * abfd,
f1885d1e 5318 struct bfd_link_info * info,
d8045f23
NC
5319 Elf_Internal_Sym * sym,
5320 const char ** namep ATTRIBUTE_UNUSED,
5321 flagword * flagsp ATTRIBUTE_UNUSED,
5322 asection ** secp ATTRIBUTE_UNUSED,
5323 bfd_vma * valp ATTRIBUTE_UNUSED)
5324{
f1885d1e
AM
5325 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5326 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
5327 && (abfd->flags & DYNAMIC) == 0
5328 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
f64b2e8d 5329 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
d8045f23
NC
5330
5331 return TRUE;
5332}
5333
6d00b590 5334#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH
5335#define TARGET_LITTLE_NAME "elf32-i386"
5336#define ELF_ARCH bfd_arch_i386
ae95ffa6 5337#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH
5338#define ELF_MACHINE_CODE EM_386
5339#define ELF_MAXPAGESIZE 0x1000
252b5132
RH
5340
5341#define elf_backend_can_gc_sections 1
51b64d56 5342#define elf_backend_can_refcount 1
252b5132
RH
5343#define elf_backend_want_got_plt 1
5344#define elf_backend_plt_readonly 1
5345#define elf_backend_want_plt_sym 0
5346#define elf_backend_got_header_size 12
e41b3a13 5347#define elf_backend_plt_alignment 4
f7483970 5348#define elf_backend_extern_protected_data 1
252b5132 5349
8c29f035
AM
5350/* Support RELA for objdump of prelink objects. */
5351#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM
5352#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5353
13ae64f3 5354#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 5355
dd5724d5
AM
5356#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5357#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5358#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 5359#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 5360#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5
AM
5361
5362#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
13285a1b 5363#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 5364#define elf_backend_check_relocs elf_i386_check_relocs
0ac8d2ca 5365#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6725bdbf 5366#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
0ac8d2ca 5367#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM
5368#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5369#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5370#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5371#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
c5fccbec
DJ
5372#define elf_backend_grok_prstatus elf_i386_grok_prstatus
5373#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 5374#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM
5375#define elf_backend_relocate_section elf_i386_relocate_section
5376#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
67a4f2b7 5377#define elf_backend_always_size_sections elf_i386_always_size_sections
74541ad4
AM
5378#define elf_backend_omit_section_dynsym \
5379 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
fdc90cb4 5380#define elf_backend_hash_symbol elf_i386_hash_symbol
d8045f23 5381#define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
dd5724d5 5382
252b5132 5383#include "elf32-target.h"
2bc3c89a
AM
5384
5385/* FreeBSD support. */
5386
5387#undef TARGET_LITTLE_SYM
6d00b590 5388#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM
5389#undef TARGET_LITTLE_NAME
5390#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L
5391#undef ELF_OSABI
5392#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM
5393
5394/* The kernel recognizes executables as valid only if they carry a
5395 "FreeBSD" label in the ELF header. So we put this label on all
5396 executables and (for simplicity) also all other object files. */
5397
2bc3c89a 5398static void
d8045f23 5399elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 5400{
78245035 5401 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 5402
2bc3c89a 5403#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L
5404 {
5405 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5406 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5407 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5408 }
caf47ea6 5409#endif
2bc3c89a
AM
5410}
5411
5412#undef elf_backend_post_process_headers
d8045f23 5413#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC
5414#undef elf32_bed
5415#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 5416
d8045f23
NC
5417#undef elf_backend_add_symbol_hook
5418
2bc3c89a 5419#include "elf32-target.h"
eac338cf 5420
a6cc6b3b
RO
5421/* Solaris 2. */
5422
5423#undef TARGET_LITTLE_SYM
6d00b590 5424#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO
5425#undef TARGET_LITTLE_NAME
5426#define TARGET_LITTLE_NAME "elf32-i386-sol2"
5427
914082d1
L
5428#undef elf_backend_post_process_headers
5429
a6cc6b3b
RO
5430/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5431 objects won't be recognized. */
5432#undef ELF_OSABI
5433
5434#undef elf32_bed
5435#define elf32_bed elf32_i386_sol2_bed
5436
7dc98aea
RO
5437/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5438 boundary. */
5439#undef elf_backend_static_tls_alignment
5440#define elf_backend_static_tls_alignment 8
5441
a6cc6b3b
RO
5442/* The Solaris 2 ABI requires a plt symbol on all platforms.
5443
5444 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5445 File, p.63. */
5446#undef elf_backend_want_plt_sym
5447#define elf_backend_want_plt_sym 1
5448
5449#include "elf32-target.h"
5450
bf64a951
L
5451/* Intel MCU support. */
5452
5453static bfd_boolean
5454elf32_iamcu_elf_object_p (bfd *abfd)
5455{
5456 /* Set the right machine number for an IAMCU elf32 file. */
5457 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5458 return TRUE;
5459}
5460
5461#undef TARGET_LITTLE_SYM
5462#define TARGET_LITTLE_SYM iamcu_elf32_vec
5463#undef TARGET_LITTLE_NAME
5464#define TARGET_LITTLE_NAME "elf32-iamcu"
5465#undef ELF_ARCH
5466#define ELF_ARCH bfd_arch_iamcu
5467
5468#undef ELF_MACHINE_CODE
5469#define ELF_MACHINE_CODE EM_IAMCU
5470
5471#undef ELF_OSABI
5472
5473#undef elf32_bed
5474#define elf32_bed elf32_iamcu_bed
5475
5476#undef elf_backend_object_p
5477#define elf_backend_object_p elf32_iamcu_elf_object_p
5478
5479#undef elf_backend_static_tls_alignment
5480
5481#undef elf_backend_want_plt_sym
5482#define elf_backend_want_plt_sym 0
5483
5484#include "elf32-target.h"
5485
5486/* Restore defaults. */
5487#undef ELF_ARCH
5488#define ELF_ARCH bfd_arch_i386
5489#undef ELF_MACHINE_CODE
5490#define ELF_MACHINE_CODE EM_386
5491
a27e4371
RM
5492/* Native Client support. */
5493
5494#undef TARGET_LITTLE_SYM
6d00b590 5495#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM
5496#undef TARGET_LITTLE_NAME
5497#define TARGET_LITTLE_NAME "elf32-i386-nacl"
5498#undef elf32_bed
5499#define elf32_bed elf32_i386_nacl_bed
5500
5501#undef ELF_MAXPAGESIZE
5502#define ELF_MAXPAGESIZE 0x10000
5503
5504/* Restore defaults. */
5505#undef ELF_OSABI
5506#undef elf_backend_want_plt_sym
5507#define elf_backend_want_plt_sym 0
5508#undef elf_backend_post_process_headers
a27e4371
RM
5509#undef elf_backend_static_tls_alignment
5510
5511/* NaCl uses substantially different PLT entries for the same effects. */
5512
5513#undef elf_backend_plt_alignment
5514#define elf_backend_plt_alignment 5
5515#define NACL_PLT_ENTRY_SIZE 64
5516#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5517
5518static const bfd_byte elf_i386_nacl_plt0_entry[] =
5519 {
5520 0xff, 0x35, /* pushl contents of address */
5521 0, 0, 0, 0, /* replaced with address of .got + 4. */
5522 0x8b, 0x0d, /* movl contents of address, %ecx */
5523 0, 0, 0, 0, /* replaced with address of .got + 8. */
5524 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5525 0xff, 0xe1 /* jmp *%ecx */
5526 };
5527
5528static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5529 {
5530 0x8b, 0x0d, /* movl contents of address, %ecx */
5531 0, 0, 0, 0, /* replaced with GOT slot address. */
5532 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5533 0xff, 0xe1, /* jmp *%ecx */
5534
5535 /* Pad to the next 32-byte boundary with nop instructions. */
5536 0x90,
5537 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5538 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5539
5540 /* Lazy GOT entries point here (32-byte aligned). */
5541 0x68, /* pushl immediate */
5542 0, 0, 0, 0, /* replaced with reloc offset. */
5543 0xe9, /* jmp relative */
5544 0, 0, 0, 0, /* replaced with offset to .plt. */
5545
5546 /* Pad to the next 32-byte boundary with nop instructions. */
5547 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5548 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5549 0x90, 0x90
5550 };
5551
5552static const bfd_byte
5553elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5554 {
5555 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5556 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5557 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5558 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM
5559
5560 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5561 so pad to that size with nop instructions. */
5562 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM
5563 };
5564
5565static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5566 {
5567 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5568 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5569 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5570 0xff, 0xe1, /* jmp *%ecx */
5571
5572 /* Pad to the next 32-byte boundary with nop instructions. */
5573 0x90,
5574 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5575 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5576
5577 /* Lazy GOT entries point here (32-byte aligned). */
5578 0x68, /* pushl immediate */
5579 0, 0, 0, 0, /* replaced with offset into relocation table. */
5580 0xe9, /* jmp relative */
5581 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5582
5583 /* Pad to the next 32-byte boundary with nop instructions. */
5584 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5585 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5586 0x90, 0x90
5587 };
5588
5589static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5590 {
5591#if (PLT_CIE_LENGTH != 20 \
5592 || PLT_FDE_LENGTH != 36 \
5593 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5594 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5595# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5596#endif
5597 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5598 0, 0, 0, 0, /* CIE ID */
5599 1, /* CIE version */
5600 'z', 'R', 0, /* Augmentation string */
5601 1, /* Code alignment factor */
5602 0x7c, /* Data alignment factor: -4 */
5603 8, /* Return address column */
5604 1, /* Augmentation size */
5605 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5606 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5607 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5608 DW_CFA_nop, DW_CFA_nop,
5609
5610 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5611 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5612 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5613 0, 0, 0, 0, /* .plt size goes here */
5614 0, /* Augmentation size */
5615 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5616 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5617 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5618 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5619 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5620 13, /* Block length */
5621 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5622 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5623 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5624 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5625 DW_CFA_nop, DW_CFA_nop
5626 };
5627
5628static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5629 {
5630 elf_i386_nacl_plt0_entry, /* plt0_entry */
5631 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5632 2, /* plt0_got1_offset */
5633 8, /* plt0_got2_offset */
5634 elf_i386_nacl_plt_entry, /* plt_entry */
5635 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5636 2, /* plt_got_offset */
5637 33, /* plt_reloc_offset */
5638 38, /* plt_plt_offset */
5639 32, /* plt_lazy_offset */
5640 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5641 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5642 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5643 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5644 };
5645
5646static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5647 {
5648 &elf_i386_nacl_plt, /* plt */
5649 0x90, /* plt0_pad_byte: nop insn */
5650 0, /* is_vxworks */
5651 };
5652
64b384e1
RM
5653static bfd_boolean
5654elf32_i386_nacl_elf_object_p (bfd *abfd)
5655{
5656 /* Set the right machine number for a NaCl i386 ELF32 file. */
5657 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5658 return TRUE;
5659}
5660
a27e4371
RM
5661#undef elf_backend_arch_data
5662#define elf_backend_arch_data &elf_i386_nacl_arch_bed
5663
64b384e1
RM
5664#undef elf_backend_object_p
5665#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM
5666#undef elf_backend_modify_segment_map
5667#define elf_backend_modify_segment_map nacl_modify_segment_map
5668#undef elf_backend_modify_program_headers
5669#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM
5670#undef elf_backend_final_write_processing
5671#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 5672
a27e4371
RM
5673#include "elf32-target.h"
5674
5a68afcf 5675/* Restore defaults. */
64b384e1 5676#undef elf_backend_object_p
5a68afcf
RM
5677#undef elf_backend_modify_segment_map
5678#undef elf_backend_modify_program_headers
887badb3 5679#undef elf_backend_final_write_processing
5a68afcf 5680
eac338cf
PB
5681/* VxWorks support. */
5682
5683#undef TARGET_LITTLE_SYM
6d00b590 5684#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB
5685#undef TARGET_LITTLE_NAME
5686#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 5687#undef ELF_OSABI
a27e4371
RM
5688#undef elf_backend_plt_alignment
5689#define elf_backend_plt_alignment 4
eac338cf 5690
23209a78
RM
5691static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5692 {
25e762b9 5693 &elf_i386_plt, /* plt */
23209a78
RM
5694 0x90, /* plt0_pad_byte */
5695 1, /* is_vxworks */
5696 };
eac338cf 5697
23209a78
RM
5698#undef elf_backend_arch_data
5699#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 5700
13285a1b 5701#undef elf_backend_relocs_compatible
eac338cf
PB
5702#undef elf_backend_add_symbol_hook
5703#define elf_backend_add_symbol_hook \
5704 elf_vxworks_add_symbol_hook
5705#undef elf_backend_link_output_symbol_hook
5706#define elf_backend_link_output_symbol_hook \
9c72ff84 5707 elf_vxworks_link_output_symbol_hook
eac338cf
PB
5708#undef elf_backend_emit_relocs
5709#define elf_backend_emit_relocs elf_vxworks_emit_relocs
5710#undef elf_backend_final_write_processing
5711#define elf_backend_final_write_processing \
5712 elf_vxworks_final_write_processing
7dc98aea 5713#undef elf_backend_static_tls_alignment
eac338cf
PB
5714
5715/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5716 define it. */
5717#undef elf_backend_want_plt_sym
5718#define elf_backend_want_plt_sym 1
5719
5720#undef elf32_bed
5721#define elf32_bed elf32_i386_vxworks_bed
5722
5723#include "elf32-target.h"
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