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i386: Check VxWorks with htab->is_vxworks
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
2571583a 2 Copyright (C) 1993-2017 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
0afcef53 21#include "elfxx-x86.h"
5a68afcf 22#include "elf-nacl.h"
eac338cf 23#include "elf-vxworks.h"
e41b3a13 24#include "dwarf2.h"
02a86693 25#include "opcode/i386.h"
252b5132 26
55fd94b0
AM		 27/* 386 uses REL relocations instead of RELA. */
28#define USE_REL 1
252b5132
RH		 29
30#include "elf/i386.h"
31
32static reloc_howto_type elf_howto_table[]=
33{
6346d5ca 34 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
1b452ec6 35 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM		 36 TRUE, 0x00000000, 0x00000000, FALSE),
37 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 38 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM		 39 TRUE, 0xffffffff, 0xffffffff, FALSE),
40 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 41 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM		 42 TRUE, 0xffffffff, 0xffffffff, TRUE),
43 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 44 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM		 45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 47 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM		 48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 50 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM		 51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 53 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM		 54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 56 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM		 57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 59 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM		 60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 62 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM		 63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 65 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 66 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 67
dc47f327
AM		 68 /* We have a gap in the reloc numbers here.
69 R_386_standard counts the number up to this point, and
70 R_386_ext_offset is the value to subtract from a reloc type of
71 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM		 72#define R_386_standard (R_386_GOTPC + 1)
73#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 74
37e55690 75 /* These relocs are a GNU extension. */
b34976b6 76 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 77 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM		 78 TRUE, 0xffffffff, 0xffffffff, FALSE),
79 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 80 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM		 81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 83 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM		 84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 86 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM		 87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 89 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM		 90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 92 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM		 93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 95 bfd_elf_generic_reloc, "R_386_16",
b34976b6 96 TRUE, 0xffff, 0xffff, FALSE),
b0360d8c 97 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 98 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM		 99 TRUE, 0xffff, 0xffff, TRUE),
100 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 101 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM		 102 TRUE, 0xff, 0xff, FALSE),
103 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 104 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 105 TRUE, 0xff, 0xff, TRUE),
dc47f327 106
55fd94b0
AM		 107#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
108#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 109 /* These are common with Solaris TLS implementation. */
b34976b6 110 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 111 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM		 112 TRUE, 0xffffffff, 0xffffffff, FALSE),
113 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 114 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM		 115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 117 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM		 118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 120 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM		 121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 123 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM		 124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 126 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 127 TRUE, 0xffffffff, 0xffffffff, FALSE),
1788fc08
L		 128 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
129 bfd_elf_generic_reloc, "R_386_SIZE32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
67a4f2b7
AO		 131 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
136 FALSE, 0, 0, FALSE),
137 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_DESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
cbe950e9
L		 140 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_386_IRELATIVE",
142 TRUE, 0xffffffff, 0xffffffff, FALSE),
02a86693
L		 143 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_GOT32X",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ		 146
147 /* Another gap. */
02a86693 148#define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
c74be520 149#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
252b5132
RH		 150
151/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 152 HOWTO (R_386_GNU_VTINHERIT, /* type */
153 0, /* rightshift */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
155 0, /* bitsize */
b34976b6 156 FALSE, /* pc_relative */
252b5132
RH		 157 0, /* bitpos */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
b34976b6 161 FALSE, /* partial_inplace */
252b5132
RH		 162 0, /* src_mask */
163 0, /* dst_mask */
b34976b6 164 FALSE), /* pcrel_offset */
252b5132
RH		 165
166/* GNU extension to record C++ vtable member usage. */
252b5132
RH		 167 HOWTO (R_386_GNU_VTENTRY, /* type */
168 0, /* rightshift */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
170 0, /* bitsize */
b34976b6 171 FALSE, /* pc_relative */
252b5132
RH		 172 0, /* bitpos */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
b34976b6 176 FALSE, /* partial_inplace */
252b5132
RH		 177 0, /* src_mask */
178 0, /* dst_mask */
b34976b6 179 FALSE) /* pcrel_offset */
dc47f327 180
55fd94b0 181#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM		 182
183};
184
252b5132 185#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 186#define TRACE(str) \
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 188#else
189#define TRACE(str)
190#endif
191
192static reloc_howto_type *
55fd94b0
AM		 193elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
194 bfd_reloc_code_real_type code)
252b5132
RH		 195{
196 switch (code)
197 {
198 case BFD_RELOC_NONE:
199 TRACE ("BFD_RELOC_NONE");
55fd94b0 200 return &elf_howto_table[R_386_NONE];
252b5132
RH		 201
202 case BFD_RELOC_32:
203 TRACE ("BFD_RELOC_32");
55fd94b0 204 return &elf_howto_table[R_386_32];
252b5132
RH		 205
206 case BFD_RELOC_CTOR:
207 TRACE ("BFD_RELOC_CTOR");
55fd94b0 208 return &elf_howto_table[R_386_32];
252b5132
RH		 209
210 case BFD_RELOC_32_PCREL:
211 TRACE ("BFD_RELOC_PC32");
55fd94b0 212 return &elf_howto_table[R_386_PC32];
252b5132
RH		 213
214 case BFD_RELOC_386_GOT32:
215 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 216 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 217
218 case BFD_RELOC_386_PLT32:
219 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 220 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 221
222 case BFD_RELOC_386_COPY:
223 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 224 return &elf_howto_table[R_386_COPY];
252b5132
RH		 225
226 case BFD_RELOC_386_GLOB_DAT:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 228 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 229
230 case BFD_RELOC_386_JUMP_SLOT:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 232 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 233
234 case BFD_RELOC_386_RELATIVE:
235 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 236 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 237
238 case BFD_RELOC_386_GOTOFF:
239 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 240 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 241
242 case BFD_RELOC_386_GOTPC:
243 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 244 return &elf_howto_table[R_386_GOTPC];
252b5132 245
37e55690
JJ		 246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 249 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 250
251 case BFD_RELOC_386_TLS_IE:
252 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 253 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 254
255 case BFD_RELOC_386_TLS_GOTIE:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 257 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 258
13ae64f3
JJ		 259 case BFD_RELOC_386_TLS_LE:
260 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 261 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 262
263 case BFD_RELOC_386_TLS_GD:
264 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 265 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 266
267 case BFD_RELOC_386_TLS_LDM:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 269 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 270
252b5132
RH		 271 case BFD_RELOC_16:
272 TRACE ("BFD_RELOC_16");
55fd94b0 273 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 274
275 case BFD_RELOC_16_PCREL:
276 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 277 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 278
279 case BFD_RELOC_8:
280 TRACE ("BFD_RELOC_8");
55fd94b0 281 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 282
283 case BFD_RELOC_8_PCREL:
284 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 285 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 286
13ae64f3
JJ		 287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 290 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 291
292 case BFD_RELOC_386_TLS_IE_32:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 294 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 295
296 case BFD_RELOC_386_TLS_LE_32:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 298 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 299
300 case BFD_RELOC_386_TLS_DTPMOD32:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 302 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 303
304 case BFD_RELOC_386_TLS_DTPOFF32:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 306 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 307
308 case BFD_RELOC_386_TLS_TPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 310 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 311
1788fc08
L		 312 case BFD_RELOC_SIZE32:
313 TRACE ("BFD_RELOC_SIZE32");
314 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
315
67a4f2b7
AO		 316 case BFD_RELOC_386_TLS_GOTDESC:
317 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
318 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
319
320 case BFD_RELOC_386_TLS_DESC_CALL:
321 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
322 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
323
324 case BFD_RELOC_386_TLS_DESC:
325 TRACE ("BFD_RELOC_386_TLS_DESC");
326 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
327
cbe950e9
L		 328 case BFD_RELOC_386_IRELATIVE:
329 TRACE ("BFD_RELOC_386_IRELATIVE");
2a750708 330 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
cbe950e9 331
02a86693
L		 332 case BFD_RELOC_386_GOT32X:
333 TRACE ("BFD_RELOC_386_GOT32X");
334 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
335
252b5132
RH		 336 case BFD_RELOC_VTABLE_INHERIT:
337 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 338 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 339
340 case BFD_RELOC_VTABLE_ENTRY:
341 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 342 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 343
344 default:
345 break;
346 }
347
348 TRACE ("Unknown");
349 return 0;
350}
351
157090f7
AM		 352static reloc_howto_type *
353elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
354 const char *r_name)
355{
356 unsigned int i;
357
358 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
359 if (elf_howto_table[i].name != NULL
360 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
361 return &elf_howto_table[i];
362
363 return NULL;
364}
365
142411ca
L		 366static reloc_howto_type *
367elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
252b5132 368{
dc47f327
AM		 369 unsigned int indx;
370
371 if ((indx = r_type) >= R_386_standard
372 && ((indx = r_type - R_386_ext_offset) - R_386_standard
373 >= R_386_ext - R_386_standard)
13ae64f3 374 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520
L		 375 >= R_386_ext2 - R_386_ext)
376 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
377 >= R_386_vt - R_386_ext2))
252b5132 378 {
695344c0 379 /* xgettext:c-format */
4eca0228
AM		 380 _bfd_error_handler (_("%B: invalid relocation type %d"),
381 abfd, (int) r_type);
55fd94b0 382 indx = R_386_NONE;
252b5132 383 }
06614111
NC		 384 /* PR 17512: file: 0f67f69d. */
385 if (elf_howto_table [indx].type != r_type)
386 return NULL;
142411ca
L		 387 return &elf_howto_table[indx];
388}
389
390static void
391elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
392 arelent *cache_ptr,
393 Elf_Internal_Rela *dst)
394{
395 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
396 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
252b5132
RH		 397}
398
399/* Return whether a symbol name implies a local label. The UnixWare
400 2.1 cc generates temporary symbols that start with .X, so we
401 recognize them here. FIXME: do other SVR4 compilers also use .X?.
402 If so, we should move the .X recognition into
403 _bfd_elf_is_local_label_name. */
404
b34976b6 405static bfd_boolean
55fd94b0 406elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 407{
408 if (name[0] == '.' && name[1] == 'X')
b34976b6 409 return TRUE;
252b5132
RH		 410
411 return _bfd_elf_is_local_label_name (abfd, name);
412}
413\f
38701953 414/* Support for core dump NOTE sections. */
61adc1a4 415
b34976b6 416static bfd_boolean
55fd94b0 417elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 418{
419 int offset;
eea6121a 420 size_t size;
38701953 421
61adc1a4 422 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 423 {
61adc1a4
NC		 424 int pr_version = bfd_get_32 (abfd, note->descdata);
425
426 if (pr_version != 1)
427 return FALSE;
428
429 /* pr_cursig */
228e534f 430 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
61adc1a4
NC		 431
432 /* pr_pid */
228e534f 433 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
61adc1a4
NC		 434
435 /* pr_reg */
436 offset = 28;
eea6121a 437 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 438 }
439 else
440 {
441 switch (note->descsz)
442 {
443 default:
444 return FALSE;
38701953 445
61adc1a4
NC		 446 case 144: /* Linux/i386 */
447 /* pr_cursig */
228e534f 448 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 449
61adc1a4 450 /* pr_pid */
228e534f 451 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
38701953 452
61adc1a4
NC		 453 /* pr_reg */
454 offset = 72;
eea6121a 455 size = 68;
38701953 456
61adc1a4
NC		 457 break;
458 }
38701953
AM		 459 }
460
461 /* Make a ".reg/999" section. */
462 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 463 size, note->descpos + offset);
38701953
AM		 464}
465
b34976b6 466static bfd_boolean
55fd94b0 467elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 468{
61adc1a4 469 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 470 {
61adc1a4
NC		 471 int pr_version = bfd_get_32 (abfd, note->descdata);
472
473 if (pr_version != 1)
b34976b6 474 return FALSE;
38701953 475
228e534f 476 elf_tdata (abfd)->core->program
61adc1a4 477 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
228e534f 478 elf_tdata (abfd)->core->command
61adc1a4
NC		 479 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
480 }
481 else
482 {
483 switch (note->descsz)
484 {
485 default:
486 return FALSE;
487
488 case 124: /* Linux/i386 elf_prpsinfo. */
228e534f 489 elf_tdata (abfd)->core->pid
261b8d08 490 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 491 elf_tdata (abfd)->core->program
61adc1a4 492 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 493 elf_tdata (abfd)->core->command
61adc1a4
NC		 494 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
495 }
38701953
AM		 496 }
497
498 /* Note that for some reason, a spurious space is tacked
499 onto the end of the args in some (at least one anyway)
500 implementations, so strip it off if it exists. */
38701953 501 {
228e534f 502 char *command = elf_tdata (abfd)->core->command;
38701953
AM		 503 int n = strlen (command);
504
505 if (0 < n && command[n - 1] == ' ')
506 command[n - 1] = '\0';
507 }
508
b34976b6 509 return TRUE;
38701953
AM		 510}
511\f
512/* Functions for the i386 ELF linker.
513
514 In order to gain some understanding of code in this file without
515 knowing all the intricate details of the linker, note the
516 following:
517
518 Functions named elf_i386_* are called by external routines, other
519 functions are only called locally. elf_i386_* functions appear
520 in this file more or less in the order in which they are called
521 from external routines. eg. elf_i386_check_relocs is called
522 early in the link process, elf_i386_finish_dynamic_sections is
523 one of the last functions. */
524
f604c2a2 525/* The size in bytes of an entry in the lazy procedure linkage table. */
252b5132 526
f604c2a2 527#define LAZY_PLT_ENTRY_SIZE 16
252b5132 528
f604c2a2
L		 529/* The size in bytes of an entry in the non-lazy procedure linkage
530 table. */
252b5132 531
f604c2a2
L		 532#define NON_LAZY_PLT_ENTRY_SIZE 8
533
534/* The first entry in an absolute lazy procedure linkage table looks
535 like this. See the SVR4 ABI i386 supplement to see how this works.
536 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
537
538static const bfd_byte elf_i386_lazy_plt0_entry[12] =
252b5132
RH		 539{
540 0xff, 0x35, /* pushl contents of address */
541 0, 0, 0, 0, /* replaced with address of .got + 4. */
542 0xff, 0x25, /* jmp indirect */
eac338cf 543 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 544};
545
f604c2a2
L		 546/* Subsequent entries in an absolute lazy procedure linkage table look
547 like this. */
252b5132 548
f604c2a2 549static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 550{
551 0xff, 0x25, /* jmp indirect */
552 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
553 0x68, /* pushl immediate */
554 0, 0, 0, 0, /* replaced with offset into relocation table. */
555 0xe9, /* jmp relative */
556 0, 0, 0, 0 /* replaced with offset to start of .plt. */
557};
558
f604c2a2
L		 559/* The first entry in a PIC lazy procedure linkage table look like
560 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
561 lazy_plt->plt0_pad_byte. */
252b5132 562
f604c2a2 563static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
252b5132
RH		 564{
565 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 566 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 567};
568
f604c2a2
L		 569/* Subsequent entries in a PIC lazy procedure linkage table look like
570 this. */
252b5132 571
f604c2a2 572static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 573{
574 0xff, 0xa3, /* jmp *offset(%ebx) */
575 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
576 0x68, /* pushl immediate */
577 0, 0, 0, 0, /* replaced with offset into relocation table. */
578 0xe9, /* jmp relative */
579 0, 0, 0, 0 /* replaced with offset to start of .plt. */
580};
581
f604c2a2 582/* Entries in the non-lazy procedure linkage table look like this. */
dd7e64d4 583
f604c2a2 584static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 585{
586 0xff, 0x25, /* jmp indirect */
587 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
588 0x66, 0x90 /* xchg %ax,%ax */
589};
590
f604c2a2
L		 591/* Entries in the PIC non-lazy procedure linkage table look like
592 this. */
dd7e64d4 593
f604c2a2 594static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 595{
596 0xff, 0xa3, /* jmp *offset(%ebx) */
597 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
598 0x66, 0x90 /* xchg %ax,%ax */
599};
600
ee2fdd6f
L		 601/* The first entry in an absolute IBT-enabled lazy procedure linkage
602 table looks like this. */
603
604static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
605{
606 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
607 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
608 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
609};
610
611/* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
612 table look like this. Subsequent entries for a PIC IBT-enabled lazy
613 procedure linkage table are the same. */
614
615static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
616{
617 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
618 0x68, 0, 0, 0, 0, /* pushl immediate */
619 0xe9, 0, 0, 0, 0, /* jmp relative */
620 0x66, 0x90 /* xchg %ax,%ax */
621};
622
623/* The first entry in a PIC IBT-enabled lazy procedure linkage table
624 look like. */
625
626static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
627{
628 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
629 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
630 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
631};
632
633/* Entries for branches with IBT-enabled in the absolute non-lazey
634 procedure linkage table look like this. They have the same size
635 as the lazy PLT entry. */
636
637static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
638{
639 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
640 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
641 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
642};
643
644/* Entries for branches with IBT-enabled in the PIC non-lazey procedure
645 linkage table look like this. They have the same size as the lazy
646 PLT entry. */
647
648static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
649{
650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
651 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
653};
654
f604c2a2 655/* .eh_frame covering the lazy .plt section. */
e41b3a13 656
f604c2a2 657static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
e41b3a13
JJ		 658{
659#define PLT_CIE_LENGTH 20
660#define PLT_FDE_LENGTH 36
661#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
662#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
663 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
664 0, 0, 0, 0, /* CIE ID */
665 1, /* CIE version */
666 'z', 'R', 0, /* Augmentation string */
667 1, /* Code alignment factor */
668 0x7c, /* Data alignment factor */
669 8, /* Return address column */
670 1, /* Augmentation size */
671 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
672 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
673 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
674 DW_CFA_nop, DW_CFA_nop,
675
676 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
677 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
678 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
679 0, 0, 0, 0, /* .plt size goes here */
680 0, /* Augmentation size */
681 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
682 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
683 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
684 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
685 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
686 11, /* Block length */
687 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
688 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
689 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 690 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ		 691 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
692};
693
ee2fdd6f
L		 694/* .eh_frame covering the lazy .plt section with IBT-enabled. */
695
696static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
697{
698 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
699 0, 0, 0, 0, /* CIE ID */
700 1, /* CIE version */
701 'z', 'R', 0, /* Augmentation string */
702 1, /* Code alignment factor */
703 0x7c, /* Data alignment factor */
704 8, /* Return address column */
705 1, /* Augmentation size */
706 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
707 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
708 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
709 DW_CFA_nop, DW_CFA_nop,
710
711 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
712 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
713 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
714 0, 0, 0, 0, /* .plt size goes here */
715 0, /* Augmentation size */
716 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
717 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
718 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
719 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
720 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
721 11, /* Block length */
722 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
723 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
724 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
725 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
726 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
727};
728
f604c2a2 729/* .eh_frame covering the non-lazy .plt section. */
fff53dae 730
f604c2a2 731static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
fff53dae
L		 732{
733#define PLT_GOT_FDE_LENGTH 16
734 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
735 0, 0, 0, 0, /* CIE ID */
736 1, /* CIE version */
737 'z', 'R', 0, /* Augmentation string */
738 1, /* Code alignment factor */
739 0x7c, /* Data alignment factor */
740 8, /* Return address column */
741 1, /* Augmentation size */
742 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
743 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
744 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
745 DW_CFA_nop, DW_CFA_nop,
746
747 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
748 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
f604c2a2
L		 749 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
750 0, 0, 0, 0, /* non-lazy .plt size goes here */
fff53dae
L		 751 0, /* Augmentation size */
752 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
753};
754
25e762b9 755/* These are the standard parameters. */
765e526c 756static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
25e762b9 757 {
f604c2a2
L		 758 elf_i386_lazy_plt0_entry, /* plt0_entry */
759 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
f604c2a2
L		 760 elf_i386_lazy_plt_entry, /* plt_entry */
761 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 762 2, /* plt0_got1_offset */
763 8, /* plt0_got2_offset */
764 0, /* plt0_got2_insn_end */
25e762b9
RM		 765 2, /* plt_got_offset */
766 7, /* plt_reloc_offset */
767 12, /* plt_plt_offset */
765e526c
L		 768 0, /* plt_got_insn_size */
769 0, /* plt_plt_insn_end */
25e762b9 770 6, /* plt_lazy_offset */
f604c2a2
L		 771 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
772 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
773 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
774 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
775 };
776
765e526c 777static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
f604c2a2
L		 778 {
779 elf_i386_non_lazy_plt_entry, /* plt_entry */
780 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
781 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
782 2, /* plt_got_offset */
765e526c 783 0, /* plt_got_insn_size */
f604c2a2
L		 784 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
785 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
25e762b9 786 };
ee2fdd6f 787
765e526c 788static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
ee2fdd6f
L		 789 {
790 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
791 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
ee2fdd6f
L		 792 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
793 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 794 2, /* plt0_got1_offset */
795 8, /* plt0_got2_offset */
796 0, /* plt0_got2_insn_end */
ee2fdd6f
L		 797 4+2, /* plt_got_offset */
798 4+1, /* plt_reloc_offset */
799 4+6, /* plt_plt_offset */
765e526c
L		 800 0, /* plt_got_insn_size */
801 0, /* plt_plt_insn_end */
ee2fdd6f
L		 802 0, /* plt_lazy_offset */
803 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
804 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
805 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
806 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
807 };
808
765e526c 809static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
ee2fdd6f
L		 810 {
811 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
812 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
813 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
814 4+2, /* plt_got_offset */
765e526c 815 0, /* plt_got_insn_size */
ee2fdd6f
L		 816 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
817 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
818 };
25e762b9
RM		 819\f
820
eac338cf
PB		 821/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
822 for the PLTResolve stub and then for each PLT entry. */
823#define PLTRESOLVE_RELOCS_SHLIB 0
824#define PLTRESOLVE_RELOCS 2
825#define PLT_NON_JUMP_SLOT_RELOCS 2
826
23209a78
RM		 827/* Architecture-specific backend data for i386. */
828
829struct elf_i386_backend_data
830{
831 /* Value used to fill the unused bytes of the first PLT entry. */
832 bfd_byte plt0_pad_byte;
833
f604c2a2
L		 834 /* Target system. */
835 enum
836 {
837 is_normal,
838 is_vxworks,
839 is_nacl
840 } os;
23209a78
RM		 841};
842
843#define get_elf_i386_backend_data(abfd) \
844 ((const struct elf_i386_backend_data *) \
845 get_elf_backend_data (abfd)->arch_data)
846
847/* These are the standard parameters. */
848static const struct elf_i386_backend_data elf_i386_arch_bed =
849 {
850 0, /* plt0_pad_byte */
f604c2a2 851 is_normal /* os */
23209a78
RM		 852 };
853
854#define elf_backend_arch_data &elf_i386_arch_bed
855
0ffa91dd
NC		 856#define is_i386_elf(bfd) \
857 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
858 && elf_tdata (bfd) != NULL \
4dfe6ac6 859 && elf_object_id (bfd) == I386_ELF_DATA)
0ffa91dd 860
67a4f2b7 861#define elf_i386_compute_jump_table_size(htab) \
998d811a 862 ((htab)->elf.srelplt->reloc_count * 4)
67a4f2b7 863
142411ca
L		 864/* Return TRUE if the TLS access code sequence support transition
865 from R_TYPE. */
866
867static bfd_boolean
bedfd056 868elf_i386_check_tls_transition (asection *sec,
142411ca
L		 869 bfd_byte *contents,
870 Elf_Internal_Shdr *symtab_hdr,
871 struct elf_link_hash_entry **sym_hashes,
872 unsigned int r_type,
873 const Elf_Internal_Rela *rel,
874 const Elf_Internal_Rela *relend)
13ae64f3 875{
6eaa7fb5 876 unsigned int val, type, reg;
142411ca
L		 877 unsigned long r_symndx;
878 struct elf_link_hash_entry *h;
879 bfd_vma offset;
6eaa7fb5 880 bfd_byte *call;
1d4af308 881 bfd_boolean indirect_call;
142411ca 882
142411ca 883 offset = rel->r_offset;
13ae64f3 884 switch (r_type)
142411ca
L		 885 {
886 case R_386_TLS_GD:
887 case R_386_TLS_LDM:
888 if (offset < 2 || (rel + 1) >= relend)
889 return FALSE;
890
6eaa7fb5
L		 891 indirect_call = FALSE;
892 call = contents + offset + 4;
893 val = *(call - 5);
894 type = *(call - 6);
142411ca
L		 895 if (r_type == R_386_TLS_GD)
896 {
09e8c3bf 897 /* Check transition from GD access model. Only
6eaa7fb5
L		 898 leal foo@tlsgd(,%ebx,1), %eax
899 call ___tls_get_addr@PLT
900 or
901 leal foo@tlsgd(%ebx) %eax
902 call ___tls_get_addr@PLT
903 nop
904 or
905 leal foo@tlsgd(%reg), %eax
906 call *___tls_get_addr@GOT(%reg)
907 which may be converted to
908 addr32 call ___tls_get_addr
142411ca 909 can transit to different access model. */
6eaa7fb5
L		 910 if ((offset + 10) > sec->size
911 || (type != 0x8d && type != 0x04))
142411ca
L		 912 return FALSE;
913
142411ca
L		 914 if (type == 0x04)
915 {
6eaa7fb5
L		 916 /* leal foo@tlsgd(,%ebx,1), %eax
917 call ___tls_get_addr@PLT */
142411ca
L		 918 if (offset < 3)
919 return FALSE;
920
6eaa7fb5
L		 921 if (*(call - 7) != 0x8d
922 || val != 0x1d
923 || call[0] != 0xe8)
142411ca
L		 924 return FALSE;
925 }
926 else
927 {
6eaa7fb5
L		 928 /* This must be
929 leal foo@tlsgd(%ebx), %eax
930 call ___tls_get_addr@PLT
931 nop
932 or
933 leal foo@tlsgd(%reg), %eax
934 call *___tls_get_addr@GOT(%reg)
935 which may be converted to
936 addr32 call ___tls_get_addr
937
938 %eax can't be used as the GOT base register since it
939 is used to pass parameter to ___tls_get_addr. */
940 reg = val & 7;
941 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca
L		 942 return FALSE;
943
6eaa7fb5
L		 944 indirect_call = call[0] == 0xff;
945 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
946 && !(call[0] == 0x67 && call[1] == 0xe8)
947 && !(indirect_call
948 && (call[1] & 0xf8) == 0x90
949 && (call[1] & 0x7) == reg))
142411ca
L		 950 return FALSE;
951 }
952 }
953 else
954 {
955 /* Check transition from LD access model. Only
6eaa7fb5
L		 956 leal foo@tlsldm(%ebx), %eax
957 call ___tls_get_addr@PLT
958 or
959 leal foo@tlsldm(%reg), %eax
960 call *___tls_get_addr@GOT(%reg)
961 which may be converted to
962 addr32 call ___tls_get_addr
142411ca
L		 963 can transit to different access model. */
964 if (type != 0x8d || (offset + 9) > sec->size)
965 return FALSE;
966
6eaa7fb5
L		 967 /* %eax can't be used as the GOT base register since it is
968 used to pass parameter to ___tls_get_addr. */
969 reg = val & 7;
970 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca 971 return FALSE;
142411ca 972
6eaa7fb5
L		 973 indirect_call = call[0] == 0xff;
974 if (!(reg == 3 && call[0] == 0xe8)
975 && !(call[0] == 0x67 && call[1] == 0xe8)
976 && !(indirect_call
977 && (call[1] & 0xf8) == 0x90
978 && (call[1] & 0x7) == reg))
979 return FALSE;
980 }
142411ca
L		 981
982 r_symndx = ELF32_R_SYM (rel[1].r_info);
983 if (r_symndx < symtab_hdr->sh_info)
984 return FALSE;
985
986 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1d4af308 987 if (h == NULL
0afcef53 988 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
6eaa7fb5
L		 989 return FALSE;
990 else if (indirect_call)
991 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
992 else
993 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
994 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
142411ca
L		 995
996 case R_386_TLS_IE:
997 /* Check transition from IE access model:
998 movl foo@indntpoff(%rip), %eax
999 movl foo@indntpoff(%rip), %reg
1000 addl foo@indntpoff(%rip), %reg
1001 */
1002
1003 if (offset < 1 || (offset + 4) > sec->size)
1004 return FALSE;
1005
1006 /* Check "movl foo@tpoff(%rip), %eax" first. */
1007 val = bfd_get_8 (abfd, contents + offset - 1);
1008 if (val == 0xa1)
1009 return TRUE;
1010
1011 if (offset < 2)
1012 return FALSE;
1013
1014 /* Check movl|addl foo@tpoff(%rip), %reg. */
1015 type = bfd_get_8 (abfd, contents + offset - 2);
1016 return ((type == 0x8b || type == 0x03)
1017 && (val & 0xc7) == 0x05);
1018
1019 case R_386_TLS_GOTIE:
1020 case R_386_TLS_IE_32:
1021 /* Check transition from {IE_32,GOTIE} access model:
1022 subl foo@{tpoff,gontoff}(%reg1), %reg2
1023 movl foo@{tpoff,gontoff}(%reg1), %reg2
1024 addl foo@{tpoff,gontoff}(%reg1), %reg2
1025 */
1026
1027 if (offset < 2 || (offset + 4) > sec->size)
1028 return FALSE;
1029
1030 val = bfd_get_8 (abfd, contents + offset - 1);
1031 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1032 return FALSE;
1033
1034 type = bfd_get_8 (abfd, contents + offset - 2);
1035 return type == 0x8b || type == 0x2b || type == 0x03;
1036
1037 case R_386_TLS_GOTDESC:
1038 /* Check transition from GDesc access model:
1039 leal x@tlsdesc(%ebx), %eax
1040
1041 Make sure it's a leal adding ebx to a 32-bit offset
1042 into any register, although it's probably almost always
1043 going to be eax. */
1044
1045 if (offset < 2 || (offset + 4) > sec->size)
1046 return FALSE;
1047
1048 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1049 return FALSE;
1050
1051 val = bfd_get_8 (abfd, contents + offset - 1);
1052 return (val & 0xc7) == 0x83;
1053
1054 case R_386_TLS_DESC_CALL:
1055 /* Check transition from GDesc access model:
6eaa7fb5 1056 call *x@tlsdesc(%eax)
142411ca
L		 1057 */
1058 if (offset + 2 <= sec->size)
1059 {
6eaa7fb5
L		 1060 /* Make sure that it's a call *x@tlsdesc(%eax). */
1061 call = contents + offset;
1062 return call[0] == 0xff && call[1] == 0x10;
142411ca
L		 1063 }
1064
1065 return FALSE;
1066
1067 default:
1068 abort ();
1069 }
1070}
1071
1072/* Return TRUE if the TLS access transition is OK or no transition
1073 will be performed. Update R_TYPE if there is a transition. */
1074
1075static bfd_boolean
1076elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1077 asection *sec, bfd_byte *contents,
1078 Elf_Internal_Shdr *symtab_hdr,
1079 struct elf_link_hash_entry **sym_hashes,
1080 unsigned int *r_type, int tls_type,
1081 const Elf_Internal_Rela *rel,
1082 const Elf_Internal_Rela *relend,
4c544807 1083 struct elf_link_hash_entry *h,
bedfd056
L		 1084 unsigned long r_symndx,
1085 bfd_boolean from_relocate_section)
142411ca
L		 1086{
1087 unsigned int from_type = *r_type;
1088 unsigned int to_type = from_type;
1089 bfd_boolean check = TRUE;
1090
bb1cb422
L		 1091 /* Skip TLS transition for functions. */
1092 if (h != NULL
1093 && (h->type == STT_FUNC
1094 || h->type == STT_GNU_IFUNC))
1095 return TRUE;
1096
142411ca 1097 switch (from_type)
13ae64f3
JJ		 1098 {
1099 case R_386_TLS_GD:
67a4f2b7
AO		 1100 case R_386_TLS_GOTDESC:
1101 case R_386_TLS_DESC_CALL:
13ae64f3 1102 case R_386_TLS_IE_32:
37e55690
JJ		 1103 case R_386_TLS_IE:
1104 case R_386_TLS_GOTIE:
0e1862bb 1105 if (bfd_link_executable (info))
142411ca
L		 1106 {
1107 if (h == NULL)
1108 to_type = R_386_TLS_LE_32;
1109 else if (from_type != R_386_TLS_IE
1110 && from_type != R_386_TLS_GOTIE)
1111 to_type = R_386_TLS_IE_32;
1112 }
1113
bedfd056
L		 1114 /* When we are called from elf_i386_relocate_section, there may
1115 be additional transitions based on TLS_TYPE. */
1116 if (from_relocate_section)
142411ca
L		 1117 {
1118 unsigned int new_to_type = to_type;
1119
0e1862bb 1120 if (bfd_link_executable (info)
142411ca
L		 1121 && h != NULL
1122 && h->dynindx == -1
1123 && (tls_type & GOT_TLS_IE))
1124 new_to_type = R_386_TLS_LE_32;
1125
1126 if (to_type == R_386_TLS_GD
1127 || to_type == R_386_TLS_GOTDESC
1128 || to_type == R_386_TLS_DESC_CALL)
1129 {
1130 if (tls_type == GOT_TLS_IE_POS)
1131 new_to_type = R_386_TLS_GOTIE;
1132 else if (tls_type & GOT_TLS_IE)
1133 new_to_type = R_386_TLS_IE_32;
1134 }
1135
1136 /* We checked the transition before when we were called from
1137 elf_i386_check_relocs. We only want to check the new
1138 transition which hasn't been checked before. */
1139 check = new_to_type != to_type && from_type == to_type;
1140 to_type = new_to_type;
1141 }
1142
1143 break;
1144
13ae64f3 1145 case R_386_TLS_LDM:
0e1862bb 1146 if (bfd_link_executable (info))
142411ca
L		 1147 to_type = R_386_TLS_LE_32;
1148 break;
1149
1150 default:
1151 return TRUE;
1152 }
1153
1154 /* Return TRUE if there is no transition. */
1155 if (from_type == to_type)
1156 return TRUE;
1157
1158 /* Check if the transition can be performed. */
1159 if (check
bedfd056 1160 && ! elf_i386_check_tls_transition (sec, contents,
142411ca
L		 1161 symtab_hdr, sym_hashes,
1162 from_type, rel, relend))
1163 {
2f629d23 1164 reloc_howto_type *from, *to;
4c544807 1165 const char *name;
142411ca
L		 1166
1167 from = elf_i386_rtype_to_howto (abfd, from_type);
1168 to = elf_i386_rtype_to_howto (abfd, to_type);
1169
4c544807
L		 1170 if (h)
1171 name = h->root.root.string;
1172 else
1173 {
0afcef53 1174 struct elf_x86_link_hash_table *htab;
4dfe6ac6 1175
0afcef53 1176 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 1177 if (htab == NULL)
1178 name = "*unknown*";
1179 else
1180 {
1181 Elf_Internal_Sym *isym;
1182
1183 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1184 abfd, r_symndx);
1185 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1186 }
4c544807
L		 1187 }
1188
4eca0228 1189 _bfd_error_handler
695344c0 1190 /* xgettext:c-format */
d42c267e 1191 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
142411ca 1192 "in section `%A' failed"),
c08bb8dd 1193 abfd, from->name, to->name, name,
d42c267e 1194 rel->r_offset, sec);
142411ca
L		 1195 bfd_set_error (bfd_error_bad_value);
1196 return FALSE;
13ae64f3
JJ		 1197 }
1198
142411ca
L		 1199 *r_type = to_type;
1200 return TRUE;
13ae64f3
JJ		 1201}
1202
c175a657
L		 1203/* With the local symbol, foo, we convert
1204 mov foo@GOT[(%reg1)], %reg2
1205 to
1206 lea foo[@GOTOFF(%reg1)], %reg2
1207 and convert
1208 call/jmp *foo@GOT[(%reg)]
1209 to
1210 nop call foo/jmp foo nop
1211 When PIC is false, convert
1212 test %reg1, foo@GOT[(%reg2)]
1213 to
1214 test $foo, %reg1
1215 and convert
1216 binop foo@GOT[(%reg1)], %reg2
1217 to
1218 binop $foo, %reg2
1219 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1220 instructions. */
1221
1222static
1223bfd_boolean
1224elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1225 bfd_byte *contents,
1226 Elf_Internal_Rela *irel,
1227 struct elf_link_hash_entry *h,
1228 bfd_boolean *converted,
1229 struct bfd_link_info *link_info)
1230{
0afcef53 1231 struct elf_x86_link_hash_table *htab;
c175a657
L		 1232 unsigned int opcode;
1233 unsigned int modrm;
1234 bfd_boolean baseless;
1235 Elf_Internal_Sym *isym;
1236 unsigned int addend;
1237 unsigned int nop;
1238 bfd_vma nop_offset;
1239 bfd_boolean is_pic;
1240 bfd_boolean to_reloc_32;
1241 unsigned int r_type;
1242 unsigned int r_symndx;
1243 bfd_vma roff = irel->r_offset;
1244
1245 if (roff < 2)
1246 return TRUE;
1247
7d4d9709 1248 /* Addend for R_386_GOT32X relocations must be 0. */
c175a657
L		 1249 addend = bfd_get_32 (abfd, contents + roff);
1250 if (addend != 0)
1251 return TRUE;
1252
0afcef53 1253 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
c175a657
L		 1254 is_pic = bfd_link_pic (link_info);
1255
1256 r_type = ELF32_R_TYPE (irel->r_info);
1257 r_symndx = ELF32_R_SYM (irel->r_info);
1258
1259 modrm = bfd_get_8 (abfd, contents + roff - 1);
1260 baseless = (modrm & 0xc7) == 0x5;
1261
7d4d9709 1262 if (baseless && is_pic)
c175a657
L		 1263 {
1264 /* For PIC, disallow R_386_GOT32X without a base register
7d4d9709 1265 since we don't know what the GOT base is. */
c175a657
L		 1266 const char *name;
1267
1268 if (h == NULL)
1269 {
1270 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1271 r_symndx);
1272 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1273 }
1274 else
1275 name = h->root.root.string;
1276
4eca0228 1277 _bfd_error_handler
695344c0 1278 /* xgettext:c-format */
63a5468a
AM		 1279 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1280 " register can not be used when making a shared object"),
c175a657
L		 1281 abfd, name);
1282 return FALSE;
1283 }
1284
1285 opcode = bfd_get_8 (abfd, contents + roff - 2);
1286
c175a657
L		 1287 /* Convert to R_386_32 if PIC is false or there is no base
1288 register. */
1289 to_reloc_32 = !is_pic || baseless;
1290
7d4d9709
L		 1291 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1292 reloc. */
c175a657
L		 1293 if (h == NULL)
1294 {
1295 if (opcode == 0x0ff)
1296 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1297 goto convert_branch;
1298 else
1299 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1300 "test %reg1, foo@GOT(%reg2)" and
1301 "binop foo@GOT[(%reg1)], %reg2". */
1302 goto convert_load;
1303 }
1304
1305 /* Undefined weak symbol is only bound locally in executable
1306 and its reference is resolved as 0. */
0afcef53
L		 1307 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE,
1308 elf_x86_hash_entry (h)))
c175a657
L		 1309 {
1310 if (opcode == 0xff)
1311 {
1312 /* No direct branch to 0 for PIC. */
1313 if (is_pic)
1314 return TRUE;
1315 else
1316 goto convert_branch;
1317 }
1318 else
1319 {
1320 /* We can convert load of address 0 to R_386_32. */
1321 to_reloc_32 = TRUE;
1322 goto convert_load;
1323 }
1324 }
1325
1326 if (opcode == 0xff)
1327 {
1328 /* We have "call/jmp *foo@GOT[(%reg)]". */
1329 if ((h->root.type == bfd_link_hash_defined
1330 || h->root.type == bfd_link_hash_defweak)
1331 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1332 {
1333 /* The function is locally defined. */
1334convert_branch:
1335 /* Convert R_386_GOT32X to R_386_PC32. */
1336 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1337 {
0afcef53
L		 1338 struct elf_x86_link_hash_entry *eh
1339 = (struct elf_x86_link_hash_entry *) h;
6eaa7fb5 1340
c175a657
L		 1341 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1342 is a nop prefix. */
1343 modrm = 0xe8;
6eaa7fb5
L		 1344 /* To support TLS optimization, always use addr32 prefix
1345 for "call *___tls_get_addr@GOT(%reg)". */
1d4af308 1346 if (eh && eh->tls_get_addr)
c175a657 1347 {
6eaa7fb5
L		 1348 nop = 0x67;
1349 nop_offset = irel->r_offset - 2;
c175a657
L		 1350 }
1351 else
6eaa7fb5
L		 1352 {
1353 nop = link_info->call_nop_byte;
1354 if (link_info->call_nop_as_suffix)
1355 {
1356 nop_offset = roff + 3;
1357 irel->r_offset -= 1;
1358 }
1359 else
1360 nop_offset = roff - 2;
1361 }
c175a657
L		 1362 }
1363 else
1364 {
1365 /* Convert to "jmp foo nop". */
1366 modrm = 0xe9;
1367 nop = NOP_OPCODE;
1368 nop_offset = roff + 3;
1369 irel->r_offset -= 1;
1370 }
1371
1372 bfd_put_8 (abfd, nop, contents + nop_offset);
1373 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1374 /* When converting to PC-relative relocation, we
1375 need to adjust addend by -4. */
1376 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1377 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1378
1379 *converted = TRUE;
1380 }
1381 }
1382 else
1383 {
1384 /* We have "mov foo@GOT[(%re1g)], %reg2",
1385 "test %reg1, foo@GOT(%reg2)" and
1386 "binop foo@GOT[(%reg1)], %reg2".
1387
1388 Avoid optimizing _DYNAMIC since ld.so may use its
1389 link-time address. */
1390 if (h == htab->elf.hdynamic)
1391 return TRUE;
1392
1393 /* def_regular is set by an assignment in a linker script in
cbd0eecf
L		 1394 bfd_elf_record_link_assignment. start_stop is set on
1395 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1396 if (h->start_stop
1397 || ((h->def_regular
1398 || h->root.type == bfd_link_hash_defined
1399 || h->root.type == bfd_link_hash_defweak)
1400 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
c175a657
L		 1401 {
1402convert_load:
1403 if (opcode == 0x8b)
1404 {
1405 if (to_reloc_32)
1406 {
1407 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1408 "mov $foo, %reg2" with R_386_32. */
1409 r_type = R_386_32;
1410 modrm = 0xc0 | (modrm & 0x38) >> 3;
1411 bfd_put_8 (abfd, modrm, contents + roff - 1);
1412 opcode = 0xc7;
1413 }
1414 else
1415 {
1416 /* Convert "mov foo@GOT(%reg1), %reg2" to
1417 "lea foo@GOTOFF(%reg1), %reg2". */
1418 r_type = R_386_GOTOFF;
1419 opcode = 0x8d;
1420 }
1421 }
1422 else
1423 {
1424 /* Only R_386_32 is supported. */
1425 if (!to_reloc_32)
1426 return TRUE;
1427
1428 if (opcode == 0x85)
1429 {
1430 /* Convert "test %reg1, foo@GOT(%reg2)" to
1431 "test $foo, %reg1". */
1432 modrm = 0xc0 | (modrm & 0x38) >> 3;
1433 opcode = 0xf7;
1434 }
1435 else
1436 {
1437 /* Convert "binop foo@GOT(%reg1), %reg2" to
1438 "binop $foo, %reg2". */
1439 modrm = (0xc0
1440 | (modrm & 0x38) >> 3
1441 | (opcode & 0x3c));
1442 opcode = 0x81;
1443 }
1444 bfd_put_8 (abfd, modrm, contents + roff - 1);
1445 r_type = R_386_32;
1446 }
1447
1448 bfd_put_8 (abfd, opcode, contents + roff - 2);
1449 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1450
1451 *converted = TRUE;
1452 }
1453 }
1454
1455 return TRUE;
1456}
1457
c1d11331
L		 1458/* Rename some of the generic section flags to better document how they
1459 are used here. */
c337a162
L		 1460#define need_convert_load sec_flg0
1461#define check_relocs_failed sec_flg1
c1d11331 1462
252b5132 1463/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1464 calculate needed space in the global offset table, procedure linkage
1465 table, and dynamic reloc sections. */
252b5132 1466
b34976b6 1467static bfd_boolean
55fd94b0
AM		 1468elf_i386_check_relocs (bfd *abfd,
1469 struct bfd_link_info *info,
1470 asection *sec,
1471 const Elf_Internal_Rela *relocs)
252b5132 1472{
0afcef53 1473 struct elf_x86_link_hash_table *htab;
252b5132
RH		 1474 Elf_Internal_Shdr *symtab_hdr;
1475 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1476 const Elf_Internal_Rela *rel;
1477 const Elf_Internal_Rela *rel_end;
252b5132 1478 asection *sreloc;
bedfd056 1479 bfd_byte *contents;
252b5132 1480
0e1862bb 1481 if (bfd_link_relocatable (info))
b34976b6 1482 return TRUE;
252b5132 1483
081b1afe
L		 1484 /* Don't do anything special with non-loaded, non-alloced sections.
1485 In particular, any relocs in such sections should not affect GOT
1486 and PLT reference counting (ie. we don't allow them to create GOT
1487 or PLT entries), there's no possibility or desire to optimize TLS
1488 relocs, and there's not much point in propagating relocs to shared
1489 libs that the dynamic linker won't relocate. */
1490 if ((sec->flags & SEC_ALLOC) == 0)
1491 return TRUE;
1492
0ffa91dd
NC		 1493 BFD_ASSERT (is_i386_elf (abfd));
1494
0afcef53 1495 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6 1496 if (htab == NULL)
c337a162
L		 1497 {
1498 sec->check_relocs_failed = 1;
1499 return FALSE;
1500 }
4dfe6ac6 1501
bedfd056
L		 1502 /* Get the section contents. */
1503 if (elf_section_data (sec)->this_hdr.contents != NULL)
1504 contents = elf_section_data (sec)->this_hdr.contents;
1505 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1506 {
1507 sec->check_relocs_failed = 1;
1508 return FALSE;
1509 }
1510
0ffa91dd 1511 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1512 sym_hashes = elf_sym_hashes (abfd);
252b5132 1513
252b5132
RH		 1514 sreloc = NULL;
1515
1516 rel_end = relocs + sec->reloc_count;
1517 for (rel = relocs; rel < rel_end; rel++)
1518 {
13ae64f3 1519 unsigned int r_type;
d42c267e 1520 unsigned int r_symndx;
252b5132 1521 struct elf_link_hash_entry *h;
0afcef53 1522 struct elf_x86_link_hash_entry *eh;
4c544807
L		 1523 Elf_Internal_Sym *isym;
1524 const char *name;
06a6a421 1525 bfd_boolean size_reloc;
252b5132
RH		 1526
1527 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1528 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1529
d9bc7a44 1530 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1531 {
695344c0 1532 /* xgettext:c-format */
4eca0228
AM		 1533 _bfd_error_handler (_("%B: bad symbol index: %d"),
1534 abfd, r_symndx);
c337a162 1535 goto error_return;
f5f31454
L		 1536 }
1537
252b5132 1538 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1539 {
1540 /* A local symbol. */
c2e61a4e
L		 1541 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1542 abfd, r_symndx);
1543 if (isym == NULL)
c337a162 1544 goto error_return;
c25bc9fc
L		 1545
1546 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1547 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1548 {
0afcef53 1549 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1550 if (h == NULL)
c337a162 1551 goto error_return;
6bbec505 1552
c25bc9fc 1553 /* Fake a STT_GNU_IFUNC symbol. */
6322e5c5
L		 1554 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1555 isym, NULL);
c25bc9fc
L		 1556 h->type = STT_GNU_IFUNC;
1557 h->def_regular = 1;
1558 h->ref_regular = 1;
1559 h->forced_local = 1;
1560 h->root.type = bfd_link_hash_defined;
1561 }
1562 else
1563 h = NULL;
1564 }
252b5132 1565 else
71cb9464 1566 {
4c544807 1567 isym = NULL;
71cb9464
L		 1568 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1569 while (h->root.type == bfd_link_hash_indirect
1570 || h->root.type == bfd_link_hash_warning)
1571 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1572 }
cbe950e9 1573
0afcef53 1574 eh = (struct elf_x86_link_hash_entry *) h;
c25bc9fc
L		 1575 if (h != NULL)
1576 {
f604c2a2
L		 1577 if (r_type == R_386_GOTOFF)
1578 eh->gotoff_ref = 1;
cbe950e9 1579
ad1e85de
L		 1580 /* It is referenced by a non-shared object. */
1581 h->ref_regular = 1;
bc4e12de 1582 h->root.non_ir_ref_regular = 1;
13a2df29
L		 1583
1584 if (h->type == STT_GNU_IFUNC)
1585 elf_tdata (info->output_bfd)->has_gnu_symbols
1586 |= elf_gnu_symbol_ifunc;
71cb9464 1587 }
252b5132 1588
bedfd056 1589 if (! elf_i386_tls_transition (info, abfd, sec, contents,
142411ca
L		 1590 symtab_hdr, sym_hashes,
1591 &r_type, GOT_UNKNOWN,
bedfd056 1592 rel, rel_end, h, r_symndx, FALSE))
c337a162 1593 goto error_return;
13ae64f3
JJ		 1594
1595 switch (r_type)
252b5132 1596 {
37e55690 1597 case R_386_TLS_LDM:
0afcef53 1598 htab->tls_ld_or_ldm_got.refcount += 1;
37e55690
JJ		 1599 goto create_got;
1600
1601 case R_386_PLT32:
1602 /* This symbol requires a procedure linkage table entry. We
1603 actually build the entry in adjust_dynamic_symbol,
1604 because this might be a case of linking PIC code which is
1605 never referenced by a dynamic object, in which case we
1606 don't need to generate a procedure linkage table entry
1607 after all. */
1608
1609 /* If this is a local symbol, we resolve it directly without
1610 creating a procedure linkage table entry. */
1611 if (h == NULL)
1612 continue;
1613
aec6b87e 1614 eh->has_got_reloc = 1;
f5385ebf 1615 h->needs_plt = 1;
37e55690
JJ		 1616 h->plt.refcount += 1;
1617 break;
1618
6a3e1bae 1619 case R_386_SIZE32:
06a6a421 1620 size_reloc = TRUE;
6a3e1bae
L		 1621 goto do_size;
1622
13ae64f3 1623 case R_386_TLS_IE_32:
37e55690
JJ		 1624 case R_386_TLS_IE:
1625 case R_386_TLS_GOTIE:
0e1862bb 1626 if (!bfd_link_executable (info))
13ae64f3 1627 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1628 /* Fall through */
1629
252b5132 1630 case R_386_GOT32:
02a86693 1631 case R_386_GOT32X:
13ae64f3 1632 case R_386_TLS_GD:
67a4f2b7
AO		 1633 case R_386_TLS_GOTDESC:
1634 case R_386_TLS_DESC_CALL:
252b5132 1635 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1636 {
1637 int tls_type, old_tls_type;
1638
1639 switch (r_type)
1640 {
1641 default:
02a86693
L		 1642 case R_386_GOT32:
1643 case R_386_GOT32X:
1644 tls_type = GOT_NORMAL;
1645 break;
13ae64f3 1646 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1647 case R_386_TLS_GOTDESC:
1648 case R_386_TLS_DESC_CALL:
1649 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1650 case R_386_TLS_IE_32:
1651 if (ELF32_R_TYPE (rel->r_info) == r_type)
1652 tls_type = GOT_TLS_IE_NEG;
1653 else
ebcfb3c0
JJ		 1654 /* If this is a GD->IE transition, we may use either of
1655 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1656 tls_type = GOT_TLS_IE;
1657 break;
1658 case R_386_TLS_IE:
1659 case R_386_TLS_GOTIE:
1660 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1661 }
1662
1663 if (h != NULL)
1664 {
1665 h->got.refcount += 1;
0afcef53 1666 old_tls_type = elf_x86_hash_entry (h)->tls_type;
13ae64f3
JJ		 1667 }
1668 else
1669 {
1670 bfd_signed_vma *local_got_refcounts;
1671
1672 /* This is a global offset table entry for a local symbol. */
1673 local_got_refcounts = elf_local_got_refcounts (abfd);
1674 if (local_got_refcounts == NULL)
1675 {
1676 bfd_size_type size;
1677
1678 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1679 size *= (sizeof (bfd_signed_vma)
1680 + sizeof (bfd_vma) + sizeof(char));
a50b1753
NC		 1681 local_got_refcounts = (bfd_signed_vma *)
1682 bfd_zalloc (abfd, size);
13ae64f3 1683 if (local_got_refcounts == NULL)
c337a162 1684 goto error_return;
13ae64f3 1685 elf_local_got_refcounts (abfd) = local_got_refcounts;
0afcef53 1686 elf_x86_local_tlsdesc_gotent (abfd)
67a4f2b7 1687 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
0afcef53 1688 elf_x86_local_got_tls_type (abfd)
67a4f2b7 1689 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ		 1690 }
1691 local_got_refcounts[r_symndx] += 1;
0afcef53 1692 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
13ae64f3
JJ		 1693 }
1694
37e55690
JJ		 1695 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1696 tls_type |= old_tls_type;
13ae64f3
JJ		 1697 /* If a TLS symbol is accessed using IE at least once,
1698 there is no point to use dynamic model for it. */
ebcfb3c0 1699 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1700 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1701 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1702 {
67a4f2b7 1703 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1704 tls_type = old_tls_type;
67a4f2b7
AO		 1705 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1706 && GOT_TLS_GD_ANY_P (tls_type))
1707 tls_type |= old_tls_type;
13ae64f3
JJ		 1708 else
1709 {
09a24cbf 1710 if (h)
4c544807
L		 1711 name = h->root.root.string;
1712 else
1713 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1714 NULL);
4eca0228 1715 _bfd_error_handler
695344c0 1716 /* xgettext:c-format */
d003868e 1717 (_("%B: `%s' accessed both as normal and "
55fd94b0 1718 "thread local symbol"),
4c544807 1719 abfd, name);
68c4a57e 1720 bfd_set_error (bfd_error_bad_value);
c337a162 1721 goto error_return;
13ae64f3
JJ		 1722 }
1723 }
1724
1725 if (old_tls_type != tls_type)
1726 {
1727 if (h != NULL)
0afcef53 1728 elf_x86_hash_entry (h)->tls_type = tls_type;
13ae64f3 1729 else
0afcef53 1730 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
13ae64f3
JJ		 1731 }
1732 }
0ac8d2ca
AM		 1733 /* Fall through */
1734
1735 case R_386_GOTOFF:
1736 case R_386_GOTPC:
13ae64f3 1737 create_got:
37e55690 1738 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1739 {
1740 if (eh != NULL)
1741 eh->has_got_reloc = 1;
1742 break;
1743 }
37e55690 1744 /* Fall through */
252b5132 1745
37e55690
JJ		 1746 case R_386_TLS_LE_32:
1747 case R_386_TLS_LE:
aec6b87e
L		 1748 if (eh != NULL)
1749 eh->has_got_reloc = 1;
0e1862bb 1750 if (bfd_link_executable (info))
37e55690 1751 break;
bffbf940 1752 info->flags |= DF_STATIC_TLS;
aec6b87e 1753 goto do_relocation;
252b5132
RH		 1754
1755 case R_386_32:
1756 case R_386_PC32:
aec6b87e
L		 1757 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1758 eh->has_non_got_reloc = 1;
1759do_relocation:
bf52d7c7
L		 1760 /* We are called after all symbols have been resolved. Only
1761 relocation against STT_GNU_IFUNC symbol must go through
1762 PLT. */
d1ed1c7d
L		 1763 if (h != NULL
1764 && (bfd_link_executable (info)
bf52d7c7 1765 || h->type == STT_GNU_IFUNC))
6725bdbf 1766 {
12d0ee4a 1767 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1768 need a copy reloc. We can't check reliably at this
1769 stage whether the section is read-only, as input
1770 sections have not yet been mapped to output sections.
1771 Tentatively set the flag for now, and correct in
1772 adjust_dynamic_symbol. */
f5385ebf 1773 h->non_got_ref = 1;
12d0ee4a 1774
233cc9c1
L		 1775 /* We may need a .plt entry if the symbol is a function
1776 defined in a shared lib or is a STT_GNU_IFUNC function
1777 referenced from the code or read-only section. */
34bb2571
L		 1778 if (!h->def_regular
1779 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
233cc9c1
L		 1780 h->plt.refcount += 1;
1781
4b627c18
L		 1782 if (r_type == R_386_PC32)
1783 {
1784 /* Since something like ".long foo - ." may be used
1785 as pointer, make sure that PLT is used if foo is
1786 a function defined in a shared library. */
1787 if ((sec->flags & SEC_CODE) == 0)
1788 h->pointer_equality_needed = 1;
74437ea2
L		 1789 else if (h->type == STT_GNU_IFUNC
1790 && bfd_link_pic (info))
1791 {
6322e5c5
L		 1792 _bfd_error_handler
1793 /* xgettext:c-format */
1794 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1795 abfd, h->root.root.string);
74437ea2
L		 1796 bfd_set_error (bfd_error_bad_value);
1797 goto error_return;
1798 }
4b627c18
L		 1799 }
1800 else
04ebc307
L		 1801 {
1802 h->pointer_equality_needed = 1;
1803 /* R_386_32 can be resolved at run-time. */
1804 if (r_type == R_386_32
1805 && (sec->flags & SEC_READONLY) == 0)
1806 eh->func_pointer_refcount += 1;
1807 }
6725bdbf 1808 }
7843f00e 1809
06a6a421 1810 size_reloc = FALSE;
6a3e1bae 1811do_size:
252b5132 1812 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1813 against a global symbol, or a non PC relative reloc
1814 against a local symbol, then we need to copy the reloc
1815 into the shared library. However, if we are linking with
1816 -Bsymbolic, we do not need to copy a reloc against a
1817 global symbol which is defined in an object we are
1818 including in the link (i.e., DEF_REGULAR is set). At
1819 this point we have not seen all the input files, so it is
1820 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1821 later (it is never cleared). In case of a weak definition,
1822 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1823 a shared library. We account for that possibility below by
1f655a09
L		 1824 storing information in the relocs_copied field of the hash
1825 table entry. A similar situation occurs when creating
1826 shared libraries and symbol visibility changes render the
12d0ee4a 1827 symbol local.
56882138 1828
12d0ee4a
AM		 1829 If on the other hand, we are creating an executable, we
1830 may need to keep relocations for symbols satisfied by a
1831 dynamic library if we manage to avoid copy relocs for the
233cc9c1
L		 1832 symbol.
1833
1834 Generate dynamic pointer relocation against STT_GNU_IFUNC
1835 symbol in the non-code section. */
081b1afe
L		 1836 if ((bfd_link_pic (info)
1837 && (r_type != R_386_PC32
1838 || (h != NULL
1839 && (! (bfd_link_pie (info)
1840 || SYMBOLIC_BIND (info, h))
1841 || h->root.type == bfd_link_hash_defweak
1842 || !h->def_regular))))
233cc9c1
L		 1843 || (h != NULL
1844 && h->type == STT_GNU_IFUNC
1845 && r_type == R_386_32
1846 && (sec->flags & SEC_CODE) == 0)
081b1afe
L		 1847 || (ELIMINATE_COPY_RELOCS
1848 && !bfd_link_pic (info)
1849 && h != NULL
1850 && (h->root.type == bfd_link_hash_defweak
1851 || !h->def_regular)))
252b5132 1852 {
e03a8ed8
L		 1853 struct elf_dyn_relocs *p;
1854 struct elf_dyn_relocs **head;
ec338859 1855
12d0ee4a
AM		 1856 /* We must copy these reloc types into the output file.
1857 Create a reloc section in dynobj and make room for
1858 this reloc. */
252b5132
RH		 1859 if (sreloc == NULL)
1860 {
83bac4b0
NC		 1861 sreloc = _bfd_elf_make_dynamic_reloc_section
1862 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1863
252b5132 1864 if (sreloc == NULL)
c337a162 1865 goto error_return;
252b5132
RH		 1866 }
1867
0c715baa
AM		 1868 /* If this is a global symbol, we count the number of
1869 relocations we need for this symbol. */
1870 if (h != NULL)
252b5132 1871 {
d5597ebc 1872 head = &eh->dyn_relocs;
0c715baa
AM		 1873 }
1874 else
1875 {
ec338859
AM		 1876 /* Track dynamic relocs needed for local syms too.
1877 We really need local syms available to do this
1878 easily. Oh well. */
87d72d41 1879 void **vpp;
ec338859 1880 asection *s;
87d72d41
AM		 1881
1882 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1883 abfd, r_symndx);
1884 if (isym == NULL)
c337a162 1885 goto error_return;
87d72d41
AM		 1886
1887 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1888 if (s == NULL)
87d72d41 1889 s = sec;
ec338859 1890
e81d3500 1891 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1892 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1893 }
1894
1895 p = *head;
1896 if (p == NULL || p->sec != sec)
1897 {
1898 bfd_size_type amt = sizeof *p;
a50b1753
NC		 1899 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1900 amt);
ec338859 1901 if (p == NULL)
c337a162 1902 goto error_return;
ec338859
AM		 1903 p->next = *head;
1904 *head = p;
1905 p->sec = sec;
1906 p->count = 0;
1907 p->pc_count = 0;
252b5132 1908 }
ec338859
AM		 1909
1910 p->count += 1;
06a6a421
L		 1911 /* Count size relocation as PC-relative relocation. */
1912 if (r_type == R_386_PC32 || size_reloc)
ec338859 1913 p->pc_count += 1;
252b5132 1914 }
252b5132
RH		 1915 break;
1916
1917 /* This relocation describes the C++ object vtable hierarchy.
1918 Reconstruct it for later use during GC. */
1919 case R_386_GNU_VTINHERIT:
d17e0c6e 1920 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c337a162 1921 goto error_return;
252b5132
RH		 1922 break;
1923
1924 /* This relocation describes which C++ vtable entries are actually
1925 used. Record for later use during GC. */
1926 case R_386_GNU_VTENTRY:
c6aa130f
MS		 1927 BFD_ASSERT (h != NULL);
1928 if (h != NULL
1929 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c337a162 1930 goto error_return;
252b5132
RH		 1931 break;
1932
1933 default:
1934 break;
1935 }
dd7e64d4 1936
52bf37dd 1937 if (r_type == R_386_GOT32X
c1d11331 1938 && (h == NULL || h->type != STT_GNU_IFUNC))
02a86693 1939 sec->need_convert_load = 1;
252b5132
RH		 1940 }
1941
bedfd056
L		 1942 if (elf_section_data (sec)->this_hdr.contents != contents)
1943 {
1944 if (!info->keep_memory)
1945 free (contents);
1946 else
1947 {
1948 /* Cache the section contents for elf_link_input_bfd. */
1949 elf_section_data (sec)->this_hdr.contents = contents;
1950 }
1951 }
1952
b34976b6 1953 return TRUE;
c337a162
L		 1954
1955error_return:
bedfd056
L		 1956 if (elf_section_data (sec)->this_hdr.contents != contents)
1957 free (contents);
c337a162
L		 1958 sec->check_relocs_failed = 1;
1959 return FALSE;
252b5132
RH		 1960}
1961
6725bdbf 1962/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 1963 dynamic relocs. */
6725bdbf 1964
b34976b6 1965static bfd_boolean
eb4ff4d6 1966elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 1967{
1968 struct bfd_link_info *info;
0afcef53
L		 1969 struct elf_x86_link_hash_table *htab;
1970 struct elf_x86_link_hash_entry *eh;
e03a8ed8 1971 struct elf_dyn_relocs *p;
25e762b9 1972 unsigned plt_entry_size;
aec6b87e 1973 bfd_boolean resolved_to_zero;
6725bdbf 1974
e92d460e 1975 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1976 return TRUE;
6725bdbf 1977
0afcef53 1978 eh = (struct elf_x86_link_hash_entry *) h;
e92d460e 1979
6725bdbf 1980 info = (struct bfd_link_info *) inf;
0afcef53 1981 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 1982 if (htab == NULL)
1983 return FALSE;
6725bdbf 1984
765e526c 1985 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 1986
e62b9723 1987 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
0afcef53 1988 I386_ELF_DATA,
e62b9723
L		 1989 eh->has_got_reloc,
1990 eh);
aec6b87e 1991
04ebc307
L		 1992 /* Clear the reference count of function pointer relocations if
1993 symbol isn't a normal function. */
1994 if (h->type != STT_FUNC)
1995 eh->func_pointer_refcount = 0;
1996
dd7e64d4
L		 1997 /* We can't use the GOT PLT if pointer equality is needed since
1998 finish_dynamic_symbol won't clear symbol value and the dynamic
1999 linker won't update the GOT slot. We will get into an infinite
2000 loop at run-time. */
2001 if (htab->plt_got != NULL
2002 && h->type != STT_GNU_IFUNC
2003 && !h->pointer_equality_needed
2004 && h->plt.refcount > 0
2005 && h->got.refcount > 0)
2006 {
2007 /* Don't use the regular PLT if there are both GOT and GOTPLT
2008 reloctions. */
2009 h->plt.offset = (bfd_vma) -1;
2010
2011 /* Use the GOT PLT. */
2012 eh->plt_got.refcount = 1;
2013 }
2014
cbe950e9
L		 2015 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2016 here if it is defined and referenced in a non-shared object. */
2017 if (h->type == STT_GNU_IFUNC
2018 && h->def_regular)
ee2fdd6f
L		 2019 {
2020 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2021 &htab->readonly_dynrelocs_against_ifunc,
2022 plt_entry_size,
765e526c 2023 (htab->plt.has_plt0
0afcef53 2024 * plt_entry_size),
ee2fdd6f
L		 2025 4, TRUE))
2026 {
2027 asection *s = htab->plt_second;
2028 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2029 {
2030 /* Use the second PLT section if it is created. */
2031 eh->plt_second.offset = s->size;
2032
2033 /* Make room for this entry in the second PLT section. */
765e526c 2034 s->size += htab->non_lazy_plt->plt_entry_size;
ee2fdd6f
L		 2035 }
2036
2037 return TRUE;
2038 }
2039 else
2040 return FALSE;
2041 }
04ebc307
L		 2042 /* Don't create the PLT entry if there are only function pointer
2043 relocations which can be resolved at run-time. */
cbe950e9 2044 else if (htab->elf.dynamic_sections_created
04ebc307
L		 2045 && (h->plt.refcount > eh->func_pointer_refcount
2046 || eh->plt_got.refcount > 0))
6725bdbf 2047 {
dc2be3d2 2048 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
25070364 2049
04ebc307
L		 2050 /* Clear the reference count of function pointer relocations
2051 if PLT is used. */
2052 eh->func_pointer_refcount = 0;
2053
5a15f56f
AM		 2054 /* Make sure this symbol is output as a dynamic symbol.
2055 Undefined weak syms won't yet be marked as dynamic. */
2056 if (h->dynindx == -1
aec6b87e 2057 && !h->forced_local
0dc9a308
L		 2058 && !resolved_to_zero
2059 && h->root.type == bfd_link_hash_undefweak)
5a15f56f 2060 {
c152c796 2061 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2062 return FALSE;
5a15f56f
AM		 2063 }
2064
0e1862bb 2065 if (bfd_link_pic (info)
4e795f50 2066 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 2067 {
6de2ae4a 2068 asection *s = htab->elf.splt;
ee2fdd6f 2069 asection *second_s = htab->plt_second;
dd7e64d4 2070 asection *got_s = htab->plt_got;
6725bdbf 2071
7c1e8d3e
L		 2072 /* If this is the first .plt entry, make room for the special
2073 first entry. The .plt section is used by prelink to undo
2074 prelinking for dynamic relocations. */
2075 if (s->size == 0)
765e526c 2076 s->size = htab->plt.has_plt0 * plt_entry_size;
7c1e8d3e 2077
dd7e64d4
L		 2078 if (use_plt_got)
2079 eh->plt_got.offset = got_s->size;
2080 else
ee2fdd6f
L		 2081 {
2082 h->plt.offset = s->size;
2083 if (second_s)
2084 eh->plt_second.offset = second_s->size;
2085 }
6725bdbf 2086
ced53ee5
AM		 2087 /* If this symbol is not defined in a regular file, and we are
2088 not generating a shared library, then set the symbol to this
2089 location in the .plt. This is required to make function
2090 pointers compare as equal between the normal executable and
2091 the shared library. */
0e1862bb 2092 if (! bfd_link_pic (info)
f5385ebf 2093 && !h->def_regular)
ced53ee5 2094 {
dd7e64d4
L		 2095 if (use_plt_got)
2096 {
2097 /* We need to make a call to the entry of the GOT PLT
2098 instead of regular PLT entry. */
2099 h->root.u.def.section = got_s;
2100 h->root.u.def.value = eh->plt_got.offset;
2101 }
2102 else
2103 {
ee2fdd6f
L		 2104 if (second_s)
2105 {
2106 /* We need to make a call to the entry of the
2107 second PLT instead of regular PLT entry. */
2108 h->root.u.def.section = second_s;
2109 h->root.u.def.value = eh->plt_second.offset;
2110 }
2111 else
2112 {
2113 h->root.u.def.section = s;
2114 h->root.u.def.value = h->plt.offset;
2115 }
dd7e64d4 2116 }
ced53ee5 2117 }
6725bdbf 2118
ced53ee5 2119 /* Make room for this entry. */
dd7e64d4 2120 if (use_plt_got)
765e526c 2121 got_s->size += htab->non_lazy_plt->plt_entry_size;
dd7e64d4
L		 2122 else
2123 {
2124 s->size += plt_entry_size;
ee2fdd6f 2125 if (second_s)
765e526c 2126 second_s->size += htab->non_lazy_plt->plt_entry_size;
6725bdbf 2127
dd7e64d4
L		 2128 /* We also need to make an entry in the .got.plt section,
2129 which will be placed in the .got section by the linker
2130 script. */
2131 htab->elf.sgotplt->size += 4;
6725bdbf 2132
aec6b87e
L		 2133 /* There should be no PLT relocation against resolved
2134 undefined weak symbol in executable. */
2135 if (!resolved_to_zero)
2136 {
2137 /* We also need to make an entry in the .rel.plt
2138 section. */
2139 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2140 htab->elf.srelplt->reloc_count++;
2141 }
dd7e64d4 2142 }
eac338cf 2143
9a742a90 2144 if (htab->is_vxworks && !bfd_link_pic (info))
eac338cf
PB		 2145 {
2146 /* VxWorks has a second set of relocations for each PLT entry
2147 in executables. They go in a separate relocation section,
2148 which is processed by the kernel loader. */
2149
2150 /* There are two relocations for the initial PLT entry: an
2151 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2152 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2153
765e526c 2154 asection *srelplt2 = htab->srelplt2;
25e762b9 2155 if (h->plt.offset == plt_entry_size)
0afcef53 2156 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
eac338cf
PB		 2157
2158 /* There are two extra relocations for each subsequent PLT entry:
2159 an R_386_32 relocation for the GOT entry, and an R_386_32
2160 relocation for the PLT entry. */
2161
0afcef53 2162 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
eac338cf 2163 }
6725bdbf 2164 }
ced53ee5
AM		 2165 else
2166 {
13f42277 2167 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2168 h->plt.offset = (bfd_vma) -1;
f5385ebf 2169 h->needs_plt = 0;
ced53ee5 2170 }
6725bdbf
AM		 2171 }
2172 else
2173 {
13f42277 2174 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2175 h->plt.offset = (bfd_vma) -1;
f5385ebf 2176 h->needs_plt = 0;
6725bdbf
AM		 2177 }
2178
67a4f2b7
AO		 2179 eh->tlsdesc_got = (bfd_vma) -1;
2180
37e55690 2181 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 2182 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2183 if (h->got.refcount > 0
0e1862bb 2184 && bfd_link_executable (info)
13ae64f3 2185 && h->dynindx == -1
0afcef53 2186 && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE))
cedb70c5 2187 h->got.offset = (bfd_vma) -1;
13ae64f3 2188 else if (h->got.refcount > 0)
6725bdbf 2189 {
0ac8d2ca 2190 asection *s;
b34976b6 2191 bfd_boolean dyn;
0afcef53 2192 int tls_type = elf_x86_hash_entry (h)->tls_type;
6725bdbf 2193
5a15f56f 2194 /* Make sure this symbol is output as a dynamic symbol.
0dc9a308 2195 Undefined weak syms won't yet be marked as dynamic. */
5a15f56f 2196 if (h->dynindx == -1
aec6b87e 2197 && !h->forced_local
e133d005 2198 && !resolved_to_zero
0dc9a308 2199 && h->root.type == bfd_link_hash_undefweak)
5a15f56f 2200 {
c152c796 2201 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2202 return FALSE;
5a15f56f
AM		 2203 }
2204
6de2ae4a 2205 s = htab->elf.sgot;
67a4f2b7
AO		 2206 if (GOT_TLS_GDESC_P (tls_type))
2207 {
6de2ae4a 2208 eh->tlsdesc_got = htab->elf.sgotplt->size
67a4f2b7 2209 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2210 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2211 h->got.offset = (bfd_vma) -2;
2212 }
2213 if (! GOT_TLS_GDESC_P (tls_type)
2214 || GOT_TLS_GD_P (tls_type))
2215 {
2216 h->got.offset = s->size;
2217 s->size += 4;
2218 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2219 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2220 s->size += 4;
2221 }
ebe50bae 2222 dyn = htab->elf.dynamic_sections_created;
13ae64f3 2223 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 2224 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2225 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2226 need two), R_386_TLS_GD needs one if local symbol and two if
aec6b87e
L		 2227 global. No dynamic relocation against resolved undefined weak
2228 symbol in executable. */
37e55690 2229 if (tls_type == GOT_TLS_IE_BOTH)
6de2ae4a 2230 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2231 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 2232 || (tls_type & GOT_TLS_IE))
6de2ae4a 2233 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2234 else if (GOT_TLS_GD_P (tls_type))
6de2ae4a 2235 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2236 else if (! GOT_TLS_GDESC_P (tls_type)
aec6b87e
L		 2237 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2238 && !resolved_to_zero)
67a4f2b7 2239 || h->root.type != bfd_link_hash_undefweak)
0e1862bb 2240 && (bfd_link_pic (info)
ef5aade5 2241 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6de2ae4a 2242 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2243 if (GOT_TLS_GDESC_P (tls_type))
6de2ae4a 2244 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 2245 }
2246 else
51b64d56 2247 h->got.offset = (bfd_vma) -1;
6725bdbf 2248
5a15f56f 2249 if (eh->dyn_relocs == NULL)
b34976b6 2250 return TRUE;
5a15f56f 2251
0c715baa
AM		 2252 /* In the shared -Bsymbolic case, discard space allocated for
2253 dynamic pc-relative relocs against symbols which turn out to be
2254 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 2255 space for pc-relative relocs that have become local due to symbol
2256 visibility changes. */
0c715baa 2257
0e1862bb 2258 if (bfd_link_pic (info))
5a15f56f 2259 {
09695f56
AM		 2260 /* The only reloc that uses pc_count is R_386_PC32, which will
2261 appear on a call or on something like ".long foo - .". We
2262 want calls to protected symbols to resolve directly to the
2263 function rather than going via the plt. If people want
2264 function pointer comparisons to work as expected then they
2265 should avoid writing assembly like ".long foo - .". */
2266 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 2267 {
e03a8ed8 2268 struct elf_dyn_relocs **pp;
0c715baa
AM		 2269
2270 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2271 {
c3ce498c
L		 2272 p->count -= p->pc_count;
2273 p->pc_count = 0;
0c715baa
AM		 2274 if (p->count == 0)
2275 *pp = p->next;
2276 else
2277 pp = &p->next;
2278 }
5a15f56f 2279 }
4e795f50 2280
9a742a90 2281 if (htab->is_vxworks)
3348747a 2282 {
e03a8ed8 2283 struct elf_dyn_relocs **pp;
3348747a
NS		 2284 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2285 {
2286 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2287 *pp = p->next;
2288 else
2289 pp = &p->next;
2290 }
2291 }
2292
4e795f50 2293 /* Also discard relocs on undefined weak syms with non-default
aec6b87e 2294 visibility or in PIE. */
22d606e9 2295 if (eh->dyn_relocs != NULL
c353e543 2296 && h->root.type == bfd_link_hash_undefweak)
22d606e9 2297 {
aec6b87e
L		 2298 /* Undefined weak symbol is never bound locally in shared
2299 library. */
2300 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2301 || resolved_to_zero)
2302 {
2303 if (h->non_got_ref)
2304 {
2305 /* Keep dynamic non-GOT/non-PLT relocation so that we
2306 can branch to 0 without PLT. */
2307 struct elf_dyn_relocs **pp;
2308
2309 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2310 if (p->pc_count == 0)
2311 *pp = p->next;
2312 else
2313 {
2314 /* Remove non-R_386_PC32 relocation. */
2315 p->count = p->pc_count;
2316 pp = &p->next;
2317 }
22d606e9 2318
aec6b87e
L		 2319 if (eh->dyn_relocs != NULL)
2320 {
2321 /* Make sure undefined weak symbols are output
2322 as dynamic symbols in PIEs for dynamic non-GOT
2323 non-PLT reloations. */
2324 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2325 return FALSE;
2326 }
2327 }
2328 else
2329 eh->dyn_relocs = NULL;
2330 }
22d606e9
AM		 2331 else if (h->dynindx == -1
2332 && !h->forced_local)
2333 {
2334 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2335 return FALSE;
2336 }
2337 }
0c715baa 2338 }
a23b6845 2339 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 2340 {
2341 /* For the non-shared case, discard space for relocs against
2342 symbols which turn out to need copy relocs or are not
04ebc307
L		 2343 dynamic. Keep dynamic relocations for run-time function
2344 pointer initialization. */
0c715baa 2345
aec6b87e
L		 2346 if ((!h->non_got_ref
2347 || eh->func_pointer_refcount > 0
2348 || (h->root.type == bfd_link_hash_undefweak
2349 && !resolved_to_zero))
f5385ebf
AM		 2350 && ((h->def_dynamic
2351 && !h->def_regular)
ebe50bae 2352 || (htab->elf.dynamic_sections_created
0c715baa
AM		 2353 && (h->root.type == bfd_link_hash_undefweak
2354 || h->root.type == bfd_link_hash_undefined))))
2355 {
2356 /* Make sure this symbol is output as a dynamic symbol.
2357 Undefined weak syms won't yet be marked as dynamic. */
2358 if (h->dynindx == -1
aec6b87e 2359 && !h->forced_local
0dc9a308
L		 2360 && !resolved_to_zero
2361 && h->root.type == bfd_link_hash_undefweak)
0c715baa 2362 {
c152c796 2363 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2364 return FALSE;
0c715baa 2365 }
5a15f56f 2366
0c715baa
AM		 2367 /* If that succeeded, we know we'll be keeping all the
2368 relocs. */
2369 if (h->dynindx != -1)
2370 goto keep;
2371 }
2372
2373 eh->dyn_relocs = NULL;
04ebc307 2374 eh->func_pointer_refcount = 0;
0c715baa 2375
ec338859 2376 keep: ;
5a15f56f
AM		 2377 }
2378
0c715baa
AM		 2379 /* Finally, allocate space. */
2380 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 2381 {
e7c33416
NC		 2382 asection *sreloc;
2383
cbe950e9 2384 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2385
2386 BFD_ASSERT (sreloc != NULL);
eea6121a 2387 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 2388 }
2389
b34976b6 2390 return TRUE;
6725bdbf
AM		 2391}
2392
c25bc9fc
L		 2393/* Allocate space in .plt, .got and associated reloc sections for
2394 local dynamic relocs. */
2395
2396static bfd_boolean
2397elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2398{
2399 struct elf_link_hash_entry *h
2400 = (struct elf_link_hash_entry *) *slot;
2401
2402 if (h->type != STT_GNU_IFUNC
2403 || !h->def_regular
2404 || !h->ref_regular
2405 || !h->forced_local
2406 || h->root.type != bfd_link_hash_defined)
2407 abort ();
2408
2409 return elf_i386_allocate_dynrelocs (h, inf);
2410}
2411
c175a657 2412/* Convert load via the GOT slot to load immediate. */
daa67607
L		 2413
2414static bfd_boolean
02a86693 2415elf_i386_convert_load (bfd *abfd, asection *sec,
a6af384b 2416 struct bfd_link_info *link_info)
daa67607 2417{
0afcef53 2418 struct elf_x86_link_hash_table *htab;
daa67607
L		 2419 Elf_Internal_Shdr *symtab_hdr;
2420 Elf_Internal_Rela *internal_relocs;
2421 Elf_Internal_Rela *irel, *irelend;
2422 bfd_byte *contents;
c175a657 2423 bfd_boolean changed;
daa67607
L		 2424 bfd_signed_vma *local_got_refcounts;
2425
2426 /* Don't even try to convert non-ELF outputs. */
2427 if (!is_elf_hash_table (link_info->hash))
2428 return FALSE;
2429
c1d11331 2430 /* Nothing to do if there is no need or no output. */
daa67607 2431 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
02a86693 2432 || sec->need_convert_load == 0
c8831961 2433 || bfd_is_abs_section (sec->output_section))
daa67607
L		 2434 return TRUE;
2435
2436 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2437
2438 /* Load the relocations for this section. */
2439 internal_relocs = (_bfd_elf_link_read_relocs
2440 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2441 link_info->keep_memory));
2442 if (internal_relocs == NULL)
2443 return FALSE;
2444
c175a657 2445 changed = FALSE;
0afcef53 2446 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
daa67607
L		 2447 local_got_refcounts = elf_local_got_refcounts (abfd);
2448
2449 /* Get the section contents. */
2450 if (elf_section_data (sec)->this_hdr.contents != NULL)
2451 contents = elf_section_data (sec)->this_hdr.contents;
2452 else
2453 {
2454 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2455 goto error_return;
2456 }
2457
2458 irelend = internal_relocs + sec->reloc_count;
2459 for (irel = internal_relocs; irel < irelend; irel++)
2460 {
2461 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
c175a657 2462 unsigned int r_symndx;
daa67607 2463 struct elf_link_hash_entry *h;
c175a657 2464 bfd_boolean converted;
daa67607 2465
7d4d9709
L		 2466 /* Don't convert R_386_GOT32 since we can't tell if it is applied
2467 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
2468 if (r_type != R_386_GOT32X)
daa67607
L		 2469 continue;
2470
c175a657 2471 r_symndx = ELF32_R_SYM (irel->r_info);
02a86693 2472 if (r_symndx < symtab_hdr->sh_info)
0afcef53
L		 2473 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2474 (const Elf_Internal_Rela *) irel,
2475 FALSE);
c175a657 2476 else
02a86693 2477 {
c175a657
L		 2478 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2479 while (h->root.type == bfd_link_hash_indirect
2480 || h->root.type == bfd_link_hash_warning)
2481 h = (struct elf_link_hash_entry *) h->root.u.i.link;
daa67607
L		 2482 }
2483
02a86693 2484 /* STT_GNU_IFUNC must keep GOT32 relocations. */
c175a657 2485 if (h != NULL && h->type == STT_GNU_IFUNC)
02a86693
L		 2486 continue;
2487
c175a657
L		 2488 converted = FALSE;
2489 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
2490 irel, h, &converted, link_info))
2491 goto error_return;
bae420ef 2492
c175a657 2493 if (converted)
02a86693 2494 {
c175a657
L		 2495 changed = converted;
2496 if (h)
02a86693 2497 {
c175a657
L		 2498 if (h->got.refcount > 0)
2499 h->got.refcount -= 1;
02a86693 2500 }
c175a657 2501 else
02a86693 2502 {
c175a657
L		 2503 if (local_got_refcounts != NULL
2504 && local_got_refcounts[r_symndx] > 0)
2505 local_got_refcounts[r_symndx] -= 1;
02a86693 2506 }
daa67607
L		 2507 }
2508 }
2509
2510 if (contents != NULL
2511 && elf_section_data (sec)->this_hdr.contents != contents)
2512 {
c175a657 2513 if (!changed && !link_info->keep_memory)
daa67607
L		 2514 free (contents);
2515 else
2516 {
2517 /* Cache the section contents for elf_link_input_bfd. */
2518 elf_section_data (sec)->this_hdr.contents = contents;
2519 }
2520 }
2521
2522 if (elf_section_data (sec)->relocs != internal_relocs)
2523 {
c175a657 2524 if (!changed)
daa67607
L		 2525 free (internal_relocs);
2526 else
2527 elf_section_data (sec)->relocs = internal_relocs;
2528 }
2529
2530 return TRUE;
2531
2532 error_return:
2533 if (contents != NULL
2534 && elf_section_data (sec)->this_hdr.contents != contents)
2535 free (contents);
2536 if (internal_relocs != NULL
2537 && elf_section_data (sec)->relocs != internal_relocs)
2538 free (internal_relocs);
2539 return FALSE;
2540}
2541
252b5132
RH		 2542/* Set the sizes of the dynamic sections. */
2543
b34976b6 2544static bfd_boolean
23209a78 2545elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
252b5132 2546{
0afcef53 2547 struct elf_x86_link_hash_table *htab;
252b5132
RH		 2548 bfd *dynobj;
2549 asection *s;
b34976b6 2550 bfd_boolean relocs;
0c715baa 2551 bfd *ibfd;
252b5132 2552
0afcef53 2553 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2554 if (htab == NULL)
2555 return FALSE;
ebe50bae 2556 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 2557 if (dynobj == NULL)
2558 abort ();
252b5132 2559
0c715baa
AM		 2560 /* Set up .got offsets for local syms, and space for local dynamic
2561 relocs. */
c72f2fb2 2562 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
161d71a6
L		 2563 {
2564 bfd_signed_vma *local_got;
2565 bfd_signed_vma *end_local_got;
13ae64f3 2566 char *local_tls_type;
67a4f2b7 2567 bfd_vma *local_tlsdesc_gotent;
161d71a6
L		 2568 bfd_size_type locsymcount;
2569 Elf_Internal_Shdr *symtab_hdr;
2570 asection *srel;
6725bdbf 2571
0ffa91dd 2572 if (! is_i386_elf (ibfd))
161d71a6 2573 continue;
6725bdbf 2574
0c715baa
AM		 2575 for (s = ibfd->sections; s != NULL; s = s->next)
2576 {
e03a8ed8 2577 struct elf_dyn_relocs *p;
0c715baa 2578
02a86693 2579 if (!elf_i386_convert_load (ibfd, s, info))
daa67607
L		 2580 return FALSE;
2581
e03a8ed8 2582 for (p = ((struct elf_dyn_relocs *)
e81d3500 2583 elf_section_data (s)->local_dynrel);
ec338859
AM		 2584 p != NULL;
2585 p = p->next)
0c715baa 2586 {
ec338859
AM		 2587 if (!bfd_is_abs_section (p->sec)
2588 && bfd_is_abs_section (p->sec->output_section))
2589 {
2590 /* Input section has been discarded, either because
2591 it is a copy of a linkonce section or due to
2592 linker script /DISCARD/, so we'll be discarding
2593 the relocs too. */
2594 }
9a742a90 2595 else if (htab->is_vxworks
3348747a
NS		 2596 && strcmp (p->sec->output_section->name,
2597 ".tls_vars") == 0)
2598 {
2599 /* Relocations in vxworks .tls_vars sections are
2600 handled specially by the loader. */
2601 }
248866a8 2602 else if (p->count != 0)
ec338859
AM		 2603 {
2604 srel = elf_section_data (p->sec)->sreloc;
eea6121a 2605 srel->size += p->count * sizeof (Elf32_External_Rel);
4b819e1f
L		 2606 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2607 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 2608 {
2609 info->flags |= DF_TEXTREL;
0e1862bb 2610 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd 2611 || info->error_textrel)
695344c0 2612 /* xgettext:c-format */
1952c5cd 2613 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 2614 p->sec->owner, p->sec);
b70321a2 2615 }
ec338859 2616 }
0c715baa
AM		 2617 }
2618 }
2619
2620 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 2621 if (!local_got)
2622 continue;
6725bdbf 2623
0ffa91dd 2624 symtab_hdr = &elf_symtab_hdr (ibfd);
161d71a6
L		 2625 locsymcount = symtab_hdr->sh_info;
2626 end_local_got = local_got + locsymcount;
0afcef53
L		 2627 local_tls_type = elf_x86_local_got_tls_type (ibfd);
2628 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 2629 s = htab->elf.sgot;
2630 srel = htab->elf.srelgot;
67a4f2b7
AO		 2631 for (; local_got < end_local_got;
2632 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 2633 {
67a4f2b7 2634 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 2635 if (*local_got > 0)
6725bdbf 2636 {
67a4f2b7
AO		 2637 if (GOT_TLS_GDESC_P (*local_tls_type))
2638 {
6de2ae4a 2639 *local_tlsdesc_gotent = htab->elf.sgotplt->size
67a4f2b7 2640 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2641 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2642 *local_got = (bfd_vma) -2;
2643 }
2644 if (! GOT_TLS_GDESC_P (*local_tls_type)
2645 || GOT_TLS_GD_P (*local_tls_type))
2646 {
2647 *local_got = s->size;
2648 s->size += 4;
2649 if (GOT_TLS_GD_P (*local_tls_type)
2650 || *local_tls_type == GOT_TLS_IE_BOTH)
2651 s->size += 4;
2652 }
0e1862bb 2653 if (bfd_link_pic (info)
67a4f2b7 2654 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ		 2655 || (*local_tls_type & GOT_TLS_IE))
2656 {
2657 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 2658 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 2659 else if (GOT_TLS_GD_P (*local_tls_type)
2660 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 2661 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7 2662 if (GOT_TLS_GDESC_P (*local_tls_type))
6de2ae4a 2663 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
37e55690 2664 }
6725bdbf 2665 }
161d71a6
L		 2666 else
2667 *local_got = (bfd_vma) -1;
6725bdbf 2668 }
252b5132 2669 }
6725bdbf 2670
0afcef53 2671 if (htab->tls_ld_or_ldm_got.refcount > 0)
13ae64f3
JJ		 2672 {
2673 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2674 relocs. */
0afcef53 2675 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
6de2ae4a
L		 2676 htab->elf.sgot->size += 8;
2677 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2678 }
2679 else
0afcef53 2680 htab->tls_ld_or_ldm_got.offset = -1;
13ae64f3 2681
0c715baa
AM		 2682 /* Allocate global sym .plt and .got entries, and space for global
2683 sym dynamic relocs. */
eb4ff4d6 2684 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
252b5132 2685
c25bc9fc
L		 2686 /* Allocate .plt and .got entries, and space for local symbols. */
2687 htab_traverse (htab->loc_hash_table,
2688 elf_i386_allocate_local_dynrelocs,
2689 info);
2690
67a4f2b7
AO		 2691 /* For every jump slot reserved in the sgotplt, reloc_count is
2692 incremented. However, when we reserve space for TLS descriptors,
2693 it's not incremented, so in order to compute the space reserved
2694 for them, it suffices to multiply the reloc count by the jump
e1f98742 2695 slot size.
caa0075c 2696
e1f98742
L		 2697 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2698 so that R_386_IRELATIVE entries come last. */
6de2ae4a 2699 if (htab->elf.srelplt)
e1f98742 2700 {
765e526c
L		 2701 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2702 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
e1f98742
L		 2703 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2704 }
2705 else if (htab->elf.irelplt)
2706 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2707
67a4f2b7 2708
a7b16ceb
L		 2709 if (htab->elf.sgotplt)
2710 {
2711 /* Don't allocate .got.plt section if there are no GOT nor PLT
9a2a56cc 2712 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 2713 if ((htab->elf.hgot == NULL
2714 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 2715 && (htab->elf.sgotplt->size
2716 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 2717 && (htab->elf.splt == NULL
2718 || htab->elf.splt->size == 0)
2719 && (htab->elf.sgot == NULL
2720 || htab->elf.sgot->size == 0)
2721 && (htab->elf.iplt == NULL
2722 || htab->elf.iplt->size == 0)
2723 && (htab->elf.igotplt == NULL
2724 || htab->elf.igotplt->size == 0))
2725 htab->elf.sgotplt->size = 0;
2726 }
2727
fff53dae
L		 2728 if (_bfd_elf_eh_frame_present (info))
2729 {
2730 if (htab->plt_eh_frame != NULL
2731 && htab->elf.splt != NULL
2732 && htab->elf.splt->size != 0
2733 && !bfd_is_abs_section (htab->elf.splt->output_section))
765e526c 2734 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
fff53dae
L		 2735
2736 if (htab->plt_got_eh_frame != NULL
2737 && htab->plt_got != NULL
2738 && htab->plt_got->size != 0
2739 && !bfd_is_abs_section (htab->plt_got->output_section))
2740 htab->plt_got_eh_frame->size
765e526c 2741 = htab->non_lazy_plt->eh_frame_plt_size;
ee2fdd6f
L		 2742
2743 /* Unwind info for the second PLT and .plt.got sections are
2744 identical. */
2745 if (htab->plt_second_eh_frame != NULL
2746 && htab->plt_second != NULL
2747 && htab->plt_second->size != 0
2748 && !bfd_is_abs_section (htab->plt_second->output_section))
2749 htab->plt_second_eh_frame->size
765e526c 2750 = htab->non_lazy_plt->eh_frame_plt_size;
fff53dae 2751 }
9a2a56cc 2752
5a15f56f
AM		 2753 /* We now have determined the sizes of the various dynamic sections.
2754 Allocate memory for them. */
b34976b6 2755 relocs = FALSE;
252b5132
RH		 2756 for (s = dynobj->sections; s != NULL; s = s->next)
2757 {
eac338cf
PB		 2758 bfd_boolean strip_section = TRUE;
2759
252b5132
RH		 2760 if ((s->flags & SEC_LINKER_CREATED) == 0)
2761 continue;
2762
6de2ae4a 2763 if (s == htab->elf.splt
9a2a56cc 2764 || s == htab->elf.sgot)
252b5132 2765 {
6725bdbf
AM		 2766 /* Strip this section if we don't need it; see the
2767 comment below. */
eac338cf
PB		 2768 /* We'd like to strip these sections if they aren't needed, but if
2769 we've exported dynamic symbols from them we must leave them.
2770 It's too late to tell BFD to get rid of the symbols. */
2771
7325306f 2772 if (htab->elf.hplt != NULL)
eac338cf 2773 strip_section = FALSE;
252b5132 2774 }
9a2a56cc
AM		 2775 else if (s == htab->elf.sgotplt
2776 || s == htab->elf.iplt
2777 || s == htab->elf.igotplt
ee2fdd6f 2778 || s == htab->plt_second
dd7e64d4 2779 || s == htab->plt_got
9a2a56cc 2780 || s == htab->plt_eh_frame
fff53dae 2781 || s == htab->plt_got_eh_frame
ee2fdd6f 2782 || s == htab->plt_second_eh_frame
5474d94f
AM		 2783 || s == htab->elf.sdynbss
2784 || s == htab->elf.sdynrelro)
9a2a56cc
AM		 2785 {
2786 /* Strip these too. */
2787 }
0112cd26 2788 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
252b5132 2789 {
6de2ae4a
L		 2790 if (s->size != 0
2791 && s != htab->elf.srelplt
765e526c 2792 && s != htab->srelplt2)
b34976b6 2793 relocs = TRUE;
252b5132 2794
0ac8d2ca
AM		 2795 /* We use the reloc_count field as a counter if we need
2796 to copy relocs into the output file. */
5ae0bfb6 2797 s->reloc_count = 0;
252b5132 2798 }
6725bdbf 2799 else
252b5132
RH		 2800 {
2801 /* It's not one of our sections, so don't allocate space. */
2802 continue;
2803 }
2804
c456f082 2805 if (s->size == 0)
252b5132 2806 {
0ac8d2ca
AM		 2807 /* If we don't need this section, strip it from the
2808 output file. This is mostly to handle .rel.bss and
2809 .rel.plt. We must create both sections in
2810 create_dynamic_sections, because they must be created
2811 before the linker maps input sections to output
2812 sections. The linker does that before
2813 adjust_dynamic_symbol is called, and it is that
2814 function which decides whether anything needs to go
2815 into these sections. */
c456f082
AM		 2816 if (strip_section)
2817 s->flags |= SEC_EXCLUDE;
252b5132
RH		 2818 continue;
2819 }
2820
c456f082
AM		 2821 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2822 continue;
2823
f69da49f
AM		 2824 /* Allocate memory for the section contents. We use bfd_zalloc
2825 here in case unused entries are not reclaimed before the
2826 section's contents are written out. This should not happen,
2827 but this way if it does, we get a R_386_NONE reloc instead
2828 of garbage. */
a50b1753 2829 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
6725bdbf 2830 if (s->contents == NULL)
b34976b6 2831 return FALSE;
252b5132
RH		 2832 }
2833
e41b3a13 2834 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 2835 && htab->plt_eh_frame->contents != NULL)
2836 {
f129e49f 2837 memcpy (htab->plt_eh_frame->contents,
765e526c 2838 htab->plt.eh_frame_plt,
f129e49f 2839 htab->plt_eh_frame->size);
9a2a56cc
AM		 2840 bfd_put_32 (dynobj, htab->elf.splt->size,
2841 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2842 }
e41b3a13 2843
fff53dae
L		 2844 if (htab->plt_got_eh_frame != NULL
2845 && htab->plt_got_eh_frame->contents != NULL)
2846 {
2847 memcpy (htab->plt_got_eh_frame->contents,
765e526c 2848 htab->non_lazy_plt->eh_frame_plt,
fff53dae
L		 2849 htab->plt_got_eh_frame->size);
2850 bfd_put_32 (dynobj, htab->plt_got->size,
2851 (htab->plt_got_eh_frame->contents
2852 + PLT_FDE_LEN_OFFSET));
2853 }
2854
ee2fdd6f
L		 2855 if (htab->plt_second_eh_frame != NULL
2856 && htab->plt_second_eh_frame->contents != NULL)
2857 {
2858 memcpy (htab->plt_second_eh_frame->contents,
765e526c 2859 htab->non_lazy_plt->eh_frame_plt,
ee2fdd6f
L		 2860 htab->plt_second_eh_frame->size);
2861 bfd_put_32 (dynobj, htab->plt_second->size,
2862 (htab->plt_second_eh_frame->contents
2863 + PLT_FDE_LEN_OFFSET));
2864 }
2865
ebe50bae 2866 if (htab->elf.dynamic_sections_created)
252b5132
RH		 2867 {
2868 /* Add some entries to the .dynamic section. We fill in the
2869 values later, in elf_i386_finish_dynamic_sections, but we
2870 must add the entries now so that we get the correct size for
2871 the .dynamic section. The DT_DEBUG entry is filled in by the
2872 dynamic linker and used by the debugger. */
dc810e39 2873#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2874 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2875
0e1862bb 2876 if (bfd_link_executable (info))
252b5132 2877 {
dc810e39 2878 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2879 return FALSE;
252b5132
RH		 2880 }
2881
6de2ae4a 2882 if (htab->elf.splt->size != 0)
252b5132 2883 {
7c1e8d3e
L		 2884 /* DT_PLTGOT is used by prelink even if there is no PLT
2885 relocation. */
2886 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 2887 return FALSE;
97d343d4 2888 }
7c1e8d3e 2889
97d343d4
L		 2890 if (htab->elf.srelplt->size != 0)
2891 {
2892 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2893 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2894 || !add_dynamic_entry (DT_JMPREL, 0))
2895 return FALSE;
252b5132
RH		 2896 }
2897
2898 if (relocs)
2899 {
dc810e39
AM		 2900 if (!add_dynamic_entry (DT_REL, 0)
2901 || !add_dynamic_entry (DT_RELSZ, 0)
2902 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 2903 return FALSE;
252b5132 2904
0c715baa
AM		 2905 /* If any dynamic relocs apply to a read-only section,
2906 then we need a DT_TEXTREL entry. */
248866a8 2907 if ((info->flags & DF_TEXTREL) == 0)
eb4ff4d6 2908 elf_link_hash_traverse (&htab->elf,
0afcef53
L		 2909 _bfd_x86_elf_readonly_dynrelocs,
2910 info);
0c715baa
AM		 2911
2912 if ((info->flags & DF_TEXTREL) != 0)
2913 {
2df3368d 2914 if (htab->readonly_dynrelocs_against_ifunc)
8efa2874
L		 2915 {
2916 info->callbacks->einfo
2917 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
2918 bfd_set_error (bfd_error_bad_value);
2919 return FALSE;
2920 }
2921
0c715baa 2922 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2923 return FALSE;
0c715baa 2924 }
252b5132 2925 }
9a742a90 2926 if (htab->is_vxworks
7a2b07ff
NS		 2927 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2928 return FALSE;
252b5132 2929 }
dc810e39 2930#undef add_dynamic_entry
252b5132 2931
b34976b6 2932 return TRUE;
252b5132
RH		 2933}
2934
38701953
AM		 2935/* Set the correct type for an x86 ELF section. We do this by the
2936 section name, which is a hack, but ought to work. */
2937
b34976b6 2938static bfd_boolean
55fd94b0
AM		 2939elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2940 Elf_Internal_Shdr *hdr,
2941 asection *sec)
38701953 2942{
91d6fa6a 2943 const char *name;
38701953
AM		 2944
2945 name = bfd_get_section_name (abfd, sec);
2946
2947 /* This is an ugly, but unfortunately necessary hack that is
2948 needed when producing EFI binaries on x86. It tells
2949 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2950 containing ELF relocation info. We need this hack in order to
2951 be able to generate ELF binaries that can be translated into
2952 EFI applications (which are essentially COFF objects). Those
2953 files contain a COFF ".reloc" section inside an ELFNN object,
2954 which would normally cause BFD to segfault because it would
2955 attempt to interpret this section as containing relocation
2956 entries for section "oc". With this hack enabled, ".reloc"
2957 will be treated as a normal data section, which will avoid the
2958 segfault. However, you won't be able to create an ELFNN binary
2959 with a section named "oc" that needs relocations, but that's
2960 the kind of ugly side-effects you get when detecting section
2961 types based on their names... In practice, this limitation is
2962 unlikely to bite. */
2963 if (strcmp (name, ".reloc") == 0)
2964 hdr->sh_type = SHT_PROGBITS;
2965
b34976b6 2966 return TRUE;
38701953
AM		 2967}
2968
13ae64f3
JJ		 2969/* Return the relocation value for @tpoff relocation
2970 if STT_TLS virtual address is ADDRESS. */
2971
2972static bfd_vma
eb4ff4d6 2973elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 2974{
e1918d23 2975 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 2976 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2977 bfd_vma static_tls_size;
13ae64f3 2978
e1918d23
AM		 2979 /* If tls_sec is NULL, we should have signalled an error already. */
2980 if (htab->tls_sec == NULL)
6a30718d 2981 return 0;
7dc98aea
RO		 2982
2983 /* Consider special static TLS alignment requirements. */
2984 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2985 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 2986}
2987
252b5132
RH		 2988/* Relocate an i386 ELF section. */
2989
b34976b6 2990static bfd_boolean
55fd94b0
AM		 2991elf_i386_relocate_section (bfd *output_bfd,
2992 struct bfd_link_info *info,
2993 bfd *input_bfd,
2994 asection *input_section,
2995 bfd_byte *contents,
2996 Elf_Internal_Rela *relocs,
2997 Elf_Internal_Sym *local_syms,
2998 asection **local_sections)
252b5132 2999{
0afcef53 3000 struct elf_x86_link_hash_table *htab;
252b5132
RH		 3001 Elf_Internal_Shdr *symtab_hdr;
3002 struct elf_link_hash_entry **sym_hashes;
3003 bfd_vma *local_got_offsets;
67a4f2b7 3004 bfd_vma *local_tlsdesc_gotents;
252b5132 3005 Elf_Internal_Rela *rel;
60f2e42e 3006 Elf_Internal_Rela *wrel;
252b5132 3007 Elf_Internal_Rela *relend;
3348747a 3008 bfd_boolean is_vxworks_tls;
25e762b9 3009 unsigned plt_entry_size;
252b5132 3010
0ffa91dd 3011 BFD_ASSERT (is_i386_elf (input_bfd));
6bbec505 3012
c337a162
L		 3013 /* Skip if check_relocs failed. */
3014 if (input_section->check_relocs_failed)
3015 return FALSE;
3016
0afcef53 3017 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 3018 if (htab == NULL)
3019 return FALSE;
0ffa91dd 3020 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 3021 sym_hashes = elf_sym_hashes (input_bfd);
3022 local_got_offsets = elf_local_got_offsets (input_bfd);
0afcef53 3023 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 3024 /* We have to handle relocations in vxworks .tls_vars sections
3025 specially, because the dynamic loader is 'weird'. */
9a742a90 3026 is_vxworks_tls = (htab->is_vxworks
0e1862bb 3027 && bfd_link_pic (info)
3348747a
NS		 3028 && !strcmp (input_section->output_section->name,
3029 ".tls_vars"));
252b5132 3030
0afcef53 3031 _bfd_x86_elf_set_tls_module_base (info);
9f03412a 3032
765e526c 3033 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 3034
60f2e42e 3035 rel = wrel = relocs;
252b5132 3036 relend = relocs + input_section->reloc_count;
60f2e42e 3037 for (; rel < relend; wrel++, rel++)
252b5132 3038 {
13ae64f3 3039 unsigned int r_type;
252b5132
RH		 3040 reloc_howto_type *howto;
3041 unsigned long r_symndx;
3042 struct elf_link_hash_entry *h;
0afcef53 3043 struct elf_x86_link_hash_entry *eh;
252b5132
RH		 3044 Elf_Internal_Sym *sym;
3045 asection *sec;
dd7e64d4 3046 bfd_vma off, offplt, plt_offset;
252b5132 3047 bfd_vma relocation;
b34976b6 3048 bfd_boolean unresolved_reloc;
252b5132 3049 bfd_reloc_status_type r;
1b452ec6 3050 unsigned int indx;
13ae64f3 3051 int tls_type;
1788fc08 3052 bfd_vma st_size;
dd7e64d4 3053 asection *resolved_plt;
aec6b87e 3054 bfd_boolean resolved_to_zero;
e133d005 3055 bfd_boolean relative_reloc;
252b5132
RH		 3056
3057 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 3058 if (r_type == R_386_GNU_VTINHERIT
3059 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 3060 {
3061 if (wrel != rel)
3062 *wrel = *rel;
3063 continue;
3064 }
dc47f327 3065
55fd94b0 3066 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 3067 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3068 >= R_386_ext - R_386_standard)
3069 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520 3070 >= R_386_ext2 - R_386_ext))
47aeb64c
NC		 3071 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3072
1b452ec6 3073 howto = elf_howto_table + indx;
252b5132
RH		 3074
3075 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 3076 h = NULL;
3077 sym = NULL;
3078 sec = NULL;
b34976b6 3079 unresolved_reloc = FALSE;
252b5132
RH		 3080 if (r_symndx < symtab_hdr->sh_info)
3081 {
3082 sym = local_syms + r_symndx;
3083 sec = local_sections[r_symndx];
3084 relocation = (sec->output_section->vma
3085 + sec->output_offset
3086 + sym->st_value);
1788fc08 3087 st_size = sym->st_size;
ab96bf03
AM		 3088
3089 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3090 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 3091 || (bfd_link_relocatable (info)
ab96bf03 3092 && sec->output_offset != 0)))
f8df10f4 3093 {
f8df10f4 3094 bfd_vma addend;
4a335f3d 3095 bfd_byte *where = contents + rel->r_offset;
f8df10f4 3096
4a335f3d 3097 switch (howto->size)
f8df10f4 3098 {
4a335f3d
AM		 3099 case 0:
3100 addend = bfd_get_8 (input_bfd, where);
3101 if (howto->pc_relative)
3102 {
3103 addend = (addend ^ 0x80) - 0x80;
3104 addend += 1;
3105 }
3106 break;
3107 case 1:
3108 addend = bfd_get_16 (input_bfd, where);
3109 if (howto->pc_relative)
3110 {
3111 addend = (addend ^ 0x8000) - 0x8000;
3112 addend += 2;
3113 }
3114 break;
3115 case 2:
3116 addend = bfd_get_32 (input_bfd, where);
3117 if (howto->pc_relative)
3118 {
3119 addend = (addend ^ 0x80000000) - 0x80000000;
3120 addend += 4;
3121 }
3122 break;
3123 default:
3124 abort ();
f8df10f4
JJ		 3125 }
3126
0e1862bb 3127 if (bfd_link_relocatable (info))
ab96bf03
AM		 3128 addend += sec->output_offset;
3129 else
3130 {
3131 asection *msec = sec;
3132 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3133 addend);
3134 addend -= relocation;
3135 addend += msec->output_section->vma + msec->output_offset;
3136 }
4a335f3d
AM		 3137
3138 switch (howto->size)
3139 {
3140 case 0:
16a10388 3141 /* FIXME: overflow checks. */
4a335f3d
AM		 3142 if (howto->pc_relative)
3143 addend -= 1;
3144 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 3145 break;
3146 case 1:
3147 if (howto->pc_relative)
3148 addend -= 2;
3149 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 3150 break;
3151 case 2:
3152 if (howto->pc_relative)
3153 addend -= 4;
3154 bfd_put_32 (input_bfd, addend, where);
3155 break;
3156 }
f8df10f4 3157 }
0e1862bb 3158 else if (!bfd_link_relocatable (info)
1f85278f 3159 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 3160 {
3161 /* Relocate against local STT_GNU_IFUNC symbol. */
0afcef53
L		 3162 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
3163 FALSE);
c25bc9fc
L		 3164 if (h == NULL)
3165 abort ();
3166
23209a78 3167 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3168 h->root.u.def.value = sym->st_value;
3169 h->root.u.def.section = sec;
3170 }
252b5132
RH		 3171 }
3172 else
3173 {
3d540e93 3174 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3175 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 3176
b2a8e766
AM		 3177 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3178 r_symndx, symtab_hdr, sym_hashes,
3179 h, sec, relocation,
62d887d4 3180 unresolved_reloc, warned, ignored);
1788fc08 3181 st_size = h->size;
252b5132
RH		 3182 }
3183
dbaa2011 3184 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 3185 {
3186 _bfd_clear_contents (howto, input_bfd, input_section,
3187 contents + rel->r_offset);
3188 wrel->r_offset = rel->r_offset;
3189 wrel->r_info = 0;
3190 wrel->r_addend = 0;
3191
3192 /* For ld -r, remove relocations in debug sections against
3193 sections defined in discarded sections. Not done for
3194 eh_frame editing code expects to be present. */
3195 if (bfd_link_relocatable (info)
3196 && (input_section->flags & SEC_DEBUGGING))
3197 wrel--;
3198
3199 continue;
3200 }
9635fe29 3201
0e1862bb 3202 if (bfd_link_relocatable (info))
2d5da473
L		 3203 {
3204 if (wrel != rel)
3205 *wrel = *rel;
3206 continue;
3207 }
ab96bf03 3208
0afcef53 3209 eh = (struct elf_x86_link_hash_entry *) h;
ee2fdd6f 3210
cbe950e9
L		 3211 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3212 it here if it is defined in a non-shared object. */
3213 if (h != NULL
3214 && h->type == STT_GNU_IFUNC
3215 && h->def_regular)
3216 {
ee2fdd6f 3217 asection *gotplt, *base_got;
cbe950e9 3218 bfd_vma plt_index;
4c544807 3219 const char *name;
cbe950e9 3220
97dc35c8
L		 3221 if ((input_section->flags & SEC_ALLOC) == 0)
3222 {
3223 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3224 sections because such sections are not SEC_ALLOC and
3225 thus ld.so will not process them. */
3226 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 3227 continue;
97dc35c8
L		 3228 abort ();
3229 }
cbe950e9
L		 3230
3231 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3232 if (htab->elf.splt != NULL)
cbe950e9 3233 {
ee2fdd6f
L		 3234 if (htab->plt_second != NULL)
3235 {
3236 resolved_plt = htab->plt_second;
3237 plt_offset = eh->plt_second.offset;
3238 }
3239 else
3240 {
3241 resolved_plt = htab->elf.splt;
3242 plt_offset = h->plt.offset;
3243 }
6de2ae4a 3244 gotplt = htab->elf.sgotplt;
cbe950e9
L		 3245 }
3246 else
3247 {
ee2fdd6f
L		 3248 resolved_plt = htab->elf.iplt;
3249 plt_offset = h->plt.offset;
6de2ae4a 3250 gotplt = htab->elf.igotplt;
cbe950e9
L		 3251 }
3252
cbe950e9
L		 3253 switch (r_type)
3254 {
3255 default:
233cc9c1 3256 break;
cbe950e9
L		 3257
3258 case R_386_GOT32:
02a86693 3259 case R_386_GOT32X:
6de2ae4a 3260 base_got = htab->elf.sgot;
cbe950e9
L		 3261 off = h->got.offset;
3262
7afd84dc 3263 if (base_got == NULL)
cbe950e9
L		 3264 abort ();
3265
7afd84dc 3266 if (off == (bfd_vma) -1)
cbe950e9 3267 {
7afd84dc
L		 3268 /* We can't use h->got.offset here to save state, or
3269 even just remember the offset, as finish_dynamic_symbol
3270 would use that as offset into .got. */
6bbec505 3271
233cc9c1
L		 3272 if (h->plt.offset == (bfd_vma) -1)
3273 abort ();
3274
6de2ae4a 3275 if (htab->elf.splt != NULL)
7afd84dc 3276 {
f604c2a2 3277 plt_index = (h->plt.offset / plt_entry_size
765e526c 3278 - htab->plt.has_plt0);
7afd84dc 3279 off = (plt_index + 3) * 4;
6de2ae4a 3280 base_got = htab->elf.sgotplt;
7afd84dc 3281 }
cbe950e9
L		 3282 else
3283 {
25e762b9 3284 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3285 off = plt_index * 4;
6de2ae4a 3286 base_got = htab->elf.igotplt;
7afd84dc
L		 3287 }
3288
3289 if (h->dynindx == -1
3290 || h->forced_local
3291 || info->symbolic)
3292 {
3293 /* This references the local defitionion. We must
3294 initialize this entry in the global offset table.
3295 Since the offset must always be a multiple of 8,
3296 we use the least significant bit to record
3297 whether we have initialized it already.
3298
3299 When doing a dynamic link, we create a .rela.got
3300 relocation entry to initialize the value. This
3301 is done in the finish_dynamic_symbol routine. */
3302 if ((off & 1) != 0)
3303 off &= ~1;
3304 else
3305 {
3306 bfd_put_32 (output_bfd, relocation,
3307 base_got->contents + off);
3308 h->got.offset |= 1;
3309 }
cbe950e9 3310 }
cbe950e9 3311
7afd84dc 3312 relocation = off;
7afd84dc
L		 3313 }
3314 else
ca8c86ef
L		 3315 relocation = (base_got->output_section->vma
3316 + base_got->output_offset + off
3317 - gotplt->output_section->vma
3318 - gotplt->output_offset);
3319
2a568401
L		 3320 if (rel->r_offset > 1
3321 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3322 && *(contents + rel->r_offset - 2) != 0x8d)
712ec279
L		 3323 {
3324 if (bfd_link_pic (info))
3325 goto disallow_got32;
3326
3327 /* Add the GOT base if there is no base register. */
3328 relocation += (gotplt->output_section->vma
3329 + gotplt->output_offset);
3330 }
3331 else if (htab->elf.splt == NULL)
3332 {
3333 /* Adjust for static executables. */
3334 relocation += gotplt->output_offset;
3335 }
0018b0a3 3336
cbe950e9 3337 goto do_relocation;
233cc9c1
L		 3338 }
3339
3340 if (h->plt.offset == (bfd_vma) -1)
3341 {
3342 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3343 if (r_type == R_386_32
3344 && (input_section->flags & SEC_CODE) == 0)
3345 goto do_ifunc_pointer;
3346 goto bad_ifunc_reloc;
3347 }
3348
ee2fdd6f
L		 3349 relocation = (resolved_plt->output_section->vma
3350 + resolved_plt->output_offset + plt_offset);
233cc9c1
L		 3351
3352 switch (r_type)
3353 {
3354 default:
3355bad_ifunc_reloc:
3356 if (h->root.root.string)
3357 name = h->root.root.string;
3358 else
3359 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3360 NULL);
4eca0228 3361 _bfd_error_handler
695344c0 3362 /* xgettext:c-format */
233cc9c1
L		 3363 (_("%B: relocation %s against STT_GNU_IFUNC "
3364 "symbol `%s' isn't supported"), input_bfd,
3365 howto->name, name);
3366 bfd_set_error (bfd_error_bad_value);
3367 return FALSE;
3368
3369 case R_386_32:
3370 /* Generate dynamic relcoation only when there is a
3371 non-GOT reference in a shared object. */
3372 if ((bfd_link_pic (info) && h->non_got_ref)
3373 || h->plt.offset == (bfd_vma) -1)
3374 {
3375 Elf_Internal_Rela outrel;
3376 asection *sreloc;
3377 bfd_vma offset;
3378
3379do_ifunc_pointer:
3380 /* Need a dynamic relocation to get the real function
3381 adddress. */
3382 offset = _bfd_elf_section_offset (output_bfd,
3383 info,
3384 input_section,
3385 rel->r_offset);
3386 if (offset == (bfd_vma) -1
3387 || offset == (bfd_vma) -2)
3388 abort ();
3389
3390 outrel.r_offset = (input_section->output_section->vma
3391 + input_section->output_offset
3392 + offset);
3393
3394 if (h->dynindx == -1
3395 || h->forced_local
3396 || bfd_link_executable (info))
3397 {
6322e5c5
L		 3398 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3399 h->root.root.string,
3400 h->root.u.def.section->owner);
3401
233cc9c1
L		 3402 /* This symbol is resolved locally. */
3403 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3404 bfd_put_32 (output_bfd,
3405 (h->root.u.def.value
3406 + h->root.u.def.section->output_section->vma
3407 + h->root.u.def.section->output_offset),
3408 contents + offset);
3409 }
3410 else
3411 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3412
3413 /* Dynamic relocations are stored in
3414 1. .rel.ifunc section in PIC object.
3415 2. .rel.got section in dynamic executable.
3416 3. .rel.iplt section in static executable. */
3417 if (bfd_link_pic (info))
3418 sreloc = htab->elf.irelifunc;
3419 else if (htab->elf.splt != NULL)
3420 sreloc = htab->elf.srelgot;
3421 else
3422 sreloc = htab->elf.irelplt;
3423 elf_append_rel (output_bfd, sreloc, &outrel);
3424
3425 /* If this reloc is against an external symbol, we
3426 do not want to fiddle with the addend. Otherwise,
3427 we need to include the symbol value so that it
3428 becomes an addend for the dynamic reloc. For an
3429 internal symbol, we have updated addend. */
3430 continue;
3431 }
3432 /* FALLTHROUGH */
3433 case R_386_PC32:
3434 case R_386_PLT32:
3435 goto do_relocation;
cbe950e9
L		 3436
3437 case R_386_GOTOFF:
3438 relocation -= (gotplt->output_section->vma
3439 + gotplt->output_offset);
3440 goto do_relocation;
3441 }
3442 }
3443
aec6b87e 3444 resolved_to_zero = (eh != NULL
e62b9723 3445 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
0afcef53 3446 I386_ELF_DATA,
e62b9723
L		 3447 eh->has_got_reloc,
3448 eh));
aec6b87e 3449
252b5132
RH		 3450 switch (r_type)
3451 {
02a86693
L		 3452 case R_386_GOT32X:
3453 /* Avoid optimizing _DYNAMIC since ld.so may use its
3454 link-time address. */
3455 if (h == htab->elf.hdynamic)
3456 goto r_386_got32;
3457
3458 if (bfd_link_pic (info))
3459 {
3460 /* It is OK to convert mov to lea and convert indirect
3461 branch to direct branch. It is OK to convert adc,
3462 add, and, cmp, or, sbb, sub, test, xor only when PIC
3463 is false. */
02e2aef8
L		 3464 unsigned int opcode, addend;
3465 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3466 if (addend != 0)
3467 goto r_386_got32;
3468 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
02a86693
L		 3469 if (opcode != 0x8b && opcode != 0xff)
3470 goto r_386_got32;
3471 }
3472
3473 /* Resolve "mov GOT[(%reg)], %reg",
3474 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3475 and "binop foo@GOT[(%reg)], %reg". */
3476 if (h == NULL
3477 || (h->plt.offset == (bfd_vma) -1
3478 && h->got.offset == (bfd_vma) -1)
3479 || htab->elf.sgotplt == NULL)
3480 abort ();
3481
3482 offplt = (htab->elf.sgotplt->output_section->vma
3483 + htab->elf.sgotplt->output_offset);
3484
3485 /* It is relative to .got.plt section. */
3486 if (h->got.offset != (bfd_vma) -1)
32875eb1
L		 3487 /* Use GOT entry. Mask off the least significant bit in
3488 GOT offset which may be set by R_386_GOT32 processing
3489 below. */
02a86693
L		 3490 relocation = (htab->elf.sgot->output_section->vma
3491 + htab->elf.sgot->output_offset
32875eb1 3492 + (h->got.offset & ~1) - offplt);
02a86693
L		 3493 else
3494 /* Use GOTPLT entry. */
f604c2a2 3495 relocation = (h->plt.offset / plt_entry_size
765e526c 3496 - htab->plt.has_plt0 + 3) * 4;
02a86693
L		 3497
3498 if (!bfd_link_pic (info))
3499 {
3500 /* If not PIC, add the .got.plt section address for
a3718e9e 3501 baseless addressing. */
02a86693 3502 unsigned int modrm;
02e2aef8 3503 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
02a86693
L		 3504 if ((modrm & 0xc7) == 0x5)
3505 relocation += offplt;
3506 }
3507
3508 unresolved_reloc = FALSE;
3509 break;
3510
252b5132 3511 case R_386_GOT32:
02a86693 3512r_386_got32:
252b5132
RH		 3513 /* Relocation is to the entry for this symbol in the global
3514 offset table. */
6de2ae4a 3515 if (htab->elf.sgot == NULL)
ffb2e45b 3516 abort ();
252b5132 3517
e133d005 3518 relative_reloc = FALSE;
252b5132
RH		 3519 if (h != NULL)
3520 {
b34976b6 3521 bfd_boolean dyn;
252b5132
RH		 3522
3523 off = h->got.offset;
ebe50bae 3524 dyn = htab->elf.dynamic_sections_created;
0e1862bb
L		 3525 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3526 bfd_link_pic (info),
3527 h)
3528 || (bfd_link_pic (info)
586119b3 3529 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 3530 || (ELF_ST_VISIBILITY (h->other)
3531 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 3532 {
3533 /* This is actually a static link, or it is a
3534 -Bsymbolic link and the symbol is defined
3535 locally, or the symbol was forced to be local
3536 because of a version file. We must initialize
3537 this entry in the global offset table. Since the
3538 offset must always be a multiple of 4, we use the
3539 least significant bit to record whether we have
3540 initialized it already.
3541
3542 When doing a dynamic link, we create a .rel.got
3543 relocation entry to initialize the value. This
3544 is done in the finish_dynamic_symbol routine. */
3545 if ((off & 1) != 0)
3546 off &= ~1;
3547 else
3548 {
3549 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3550 htab->elf.sgot->contents + off);
252b5132 3551 h->got.offset |= 1;
e133d005
L		 3552
3553 if (h->dynindx == -1
3554 && !h->forced_local
3555 && h->root.type != bfd_link_hash_undefweak
0dc9a308 3556 && bfd_link_pic (info))
e133d005
L		 3557 {
3558 /* PR ld/21402: If this symbol isn't dynamic
0dc9a308 3559 in PIC, generate R_386_RELATIVE here. */
e133d005
L		 3560 eh->no_finish_dynamic_symbol = 1;
3561 relative_reloc = TRUE;
3562 }
252b5132
RH		 3563 }
3564 }
8c694914 3565 else
b34976b6 3566 unresolved_reloc = FALSE;
252b5132
RH		 3567 }
3568 else
3569 {
ffb2e45b
AM		 3570 if (local_got_offsets == NULL)
3571 abort ();
252b5132
RH		 3572
3573 off = local_got_offsets[r_symndx];
3574
3575 /* The offset must always be a multiple of 4. We use
83be169b
AM		 3576 the least significant bit to record whether we have
3577 already generated the necessary reloc. */
252b5132
RH		 3578 if ((off & 1) != 0)
3579 off &= ~1;
3580 else
3581 {
6725bdbf 3582 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3583 htab->elf.sgot->contents + off);
e133d005 3584 local_got_offsets[r_symndx] |= 1;
252b5132 3585
0e1862bb 3586 if (bfd_link_pic (info))
e133d005 3587 relative_reloc = TRUE;
252b5132 3588 }
252b5132
RH		 3589 }
3590
e133d005
L		 3591 if (relative_reloc)
3592 {
3593 asection *s;
3594 Elf_Internal_Rela outrel;
3595
3596 s = htab->elf.srelgot;
3597 if (s == NULL)
3598 abort ();
3599
3600 outrel.r_offset = (htab->elf.sgot->output_section->vma
3601 + htab->elf.sgot->output_offset
3602 + off);
3603 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3604 elf_append_rel (output_bfd, s, &outrel);
3605 }
3606
ffb2e45b
AM		 3607 if (off >= (bfd_vma) -2)
3608 abort ();
3609
74d7f0aa
L		 3610 relocation = (htab->elf.sgot->output_section->vma
3611 + htab->elf.sgot->output_offset + off);
2a568401
L		 3612 if (rel->r_offset > 1
3613 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3614 && *(contents + rel->r_offset - 2) != 0x8d)
74d7f0aa
L		 3615 {
3616 if (bfd_link_pic (info))
3617 {
3618 /* For PIC, disallow R_386_GOT32 without a base
2a568401
L		 3619 register, except for "lea foo@GOT, %reg", since
3620 we don't know what the GOT base is. */
74d7f0aa
L		 3621 const char *name;
3622
712ec279 3623disallow_got32:
a5def14f 3624 if (h == NULL || h->root.root.string == NULL)
74d7f0aa
L		 3625 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3626 NULL);
3627 else
3628 name = h->root.root.string;
3629
4eca0228 3630 _bfd_error_handler
695344c0 3631 /* xgettext:c-format */
63a5468a
AM		 3632 (_("%B: direct GOT relocation %s against `%s'"
3633 " without base register can not be used"
3634 " when making a shared object"),
712ec279 3635 input_bfd, howto->name, name);
74d7f0aa
L		 3636 bfd_set_error (bfd_error_bad_value);
3637 return FALSE;
3638 }
3639 }
3640 else
3641 {
3642 /* Subtract the .got.plt section address only with a base
3643 register. */
3644 relocation -= (htab->elf.sgotplt->output_section->vma
3645 + htab->elf.sgotplt->output_offset);
3646 }
3647
252b5132
RH		 3648 break;
3649
3650 case R_386_GOTOFF:
3651 /* Relocation is relative to the start of the global offset
3652 table. */
3653
3d949995
L		 3654 /* Check to make sure it isn't a protected function or data
3655 symbol for shared library since it may not be local when
3656 used as function address or with copy relocation. We also
e3c0e327 3657 need to make sure that a symbol is referenced locally. */
0e1862bb 3658 if (!bfd_link_executable (info) && h)
90f487df 3659 {
41bed6dd
L		 3660 if (!h->def_regular)
3661 {
3662 const char *v;
3663
3664 switch (ELF_ST_VISIBILITY (h->other))
3665 {
3666 case STV_HIDDEN:
3667 v = _("hidden symbol");
3668 break;
3669 case STV_INTERNAL:
3670 v = _("internal symbol");
3671 break;
3672 case STV_PROTECTED:
3673 v = _("protected symbol");
3674 break;
3675 default:
3676 v = _("symbol");
3677 break;
3678 }
3679
4eca0228 3680 _bfd_error_handler
695344c0 3681 /* xgettext:c-format */
63a5468a
AM		 3682 (_("%B: relocation R_386_GOTOFF against undefined %s"
3683 " `%s' can not be used when making a shared object"),
41bed6dd
L		 3684 input_bfd, v, h->root.root.string);
3685 bfd_set_error (bfd_error_bad_value);
3686 return FALSE;
3687 }
d5597ebc 3688 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3d949995
L		 3689 && (h->type == STT_FUNC
3690 || h->type == STT_OBJECT)
41bed6dd
L		 3691 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3692 {
4eca0228 3693 _bfd_error_handler
695344c0 3694 /* xgettext:c-format */
63a5468a
AM		 3695 (_("%B: relocation R_386_GOTOFF against protected %s"
3696 " `%s' can not be used when making a shared object"),
3d949995
L		 3697 input_bfd,
3698 h->type == STT_FUNC ? "function" : "data",
3699 h->root.root.string);
41bed6dd
L		 3700 bfd_set_error (bfd_error_bad_value);
3701 return FALSE;
3702 }
90f487df
L		 3703 }
3704
8c37241b
JJ		 3705 /* Note that sgot is not involved in this
3706 calculation. We always want the start of .got.plt. If we
3707 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 3708 permitted by the ABI, we might have to change this
3709 calculation. */
6de2ae4a
L		 3710 relocation -= htab->elf.sgotplt->output_section->vma
3711 + htab->elf.sgotplt->output_offset;
252b5132
RH		 3712 break;
3713
3714 case R_386_GOTPC:
3715 /* Use global offset table as symbol value. */
6de2ae4a
L		 3716 relocation = htab->elf.sgotplt->output_section->vma
3717 + htab->elf.sgotplt->output_offset;
b34976b6 3718 unresolved_reloc = FALSE;
252b5132
RH		 3719 break;
3720
3721 case R_386_PLT32:
3722 /* Relocation is to the entry for this symbol in the
3723 procedure linkage table. */
3724
dd5724d5 3725 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 3726 without using the procedure linkage table. */
252b5132
RH		 3727 if (h == NULL)
3728 break;
3729
dd7e64d4
L		 3730 if ((h->plt.offset == (bfd_vma) -1
3731 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 3732 || htab->elf.splt == NULL)
252b5132
RH		 3733 {
3734 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 3735 happens when statically linking PIC code, or when
3736 using -Bsymbolic. */
252b5132
RH		 3737 break;
3738 }
3739
dd7e64d4
L		 3740 if (h->plt.offset != (bfd_vma) -1)
3741 {
ee2fdd6f
L		 3742 if (htab->plt_second != NULL)
3743 {
3744 resolved_plt = htab->plt_second;
3745 plt_offset = eh->plt_second.offset;
3746 }
3747 else
3748 {
3749 resolved_plt = htab->elf.splt;
3750 plt_offset = h->plt.offset;
3751 }
dd7e64d4
L		 3752 }
3753 else
3754 {
3755 resolved_plt = htab->plt_got;
3756 plt_offset = eh->plt_got.offset;
3757 }
3758
3759 relocation = (resolved_plt->output_section->vma
3760 + resolved_plt->output_offset
3761 + plt_offset);
b34976b6 3762 unresolved_reloc = FALSE;
252b5132
RH		 3763 break;
3764
1788fc08 3765 case R_386_SIZE32:
1788fc08
L		 3766 /* Set to symbol size. */
3767 relocation = st_size;
3768 /* Fall through. */
3769
252b5132
RH		 3770 case R_386_32:
3771 case R_386_PC32:
3348747a
NS		 3772 if ((input_section->flags & SEC_ALLOC) == 0
3773 || is_vxworks_tls)
ec338859
AM		 3774 break;
3775
aec6b87e
L		 3776 /* Copy dynamic function pointer relocations. Don't generate
3777 dynamic relocations against resolved undefined weak symbols
3778 in PIE, except for R_386_PC32. */
0e1862bb 3779 if ((bfd_link_pic (info)
ef5aade5 3780 && (h == NULL
aec6b87e
L		 3781 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3782 && (!resolved_to_zero
3783 || r_type == R_386_PC32))
3784 || h->root.type != bfd_link_hash_undefweak))
1788fc08 3785 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
f6c52c13 3786 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845 3787 || (ELIMINATE_COPY_RELOCS
0e1862bb 3788 && !bfd_link_pic (info)
12d0ee4a
AM		 3789 && h != NULL
3790 && h->dynindx != -1
aec6b87e
L		 3791 && (!h->non_got_ref
3792 || eh->func_pointer_refcount > 0
3793 || (h->root.type == bfd_link_hash_undefweak
3794 && !resolved_to_zero))
bae420ef
L		 3795 && ((h->def_dynamic && !h->def_regular)
3796 /* Undefined weak symbol is bound locally when
3797 PIC is false. */
3798 || h->root.type == bfd_link_hash_undefweak)))
252b5132 3799 {
947216bf 3800 Elf_Internal_Rela outrel;
b34976b6 3801 bfd_boolean skip, relocate;
0c715baa 3802 asection *sreloc;
252b5132
RH		 3803
3804 /* When generating a shared object, these relocations
3805 are copied into the output file to be resolved at run
3806 time. */
3807
b34976b6
AM		 3808 skip = FALSE;
3809 relocate = FALSE;
252b5132 3810
c629eae0
JJ		 3811 outrel.r_offset =
3812 _bfd_elf_section_offset (output_bfd, info, input_section,
3813 rel->r_offset);
3814 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 3815 skip = TRUE;
0bb2d96a 3816 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 3817 skip = TRUE, relocate = TRUE;
252b5132
RH		 3818 outrel.r_offset += (input_section->output_section->vma
3819 + input_section->output_offset);
3820
3821 if (skip)
0bb2d96a 3822 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 3823 else if (h != NULL
3824 && h->dynindx != -1
3825 && (r_type == R_386_PC32
4e0c91e4
L		 3826 || !(bfd_link_executable (info)
3827 || SYMBOLIC_BIND (info, h))
f5385ebf 3828 || !h->def_regular))
0bb2d96a 3829 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 3830 else
3831 {
5a15f56f 3832 /* This symbol is local, or marked to become local. */
b34976b6 3833 relocate = TRUE;
5a15f56f 3834 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 3835 }
3836
cbe950e9 3837 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 3838
62d78908
L		 3839 if (sreloc == NULL || sreloc->contents == NULL)
3840 {
3841 r = bfd_reloc_notsupported;
3842 goto check_relocation_error;
3843 }
0c715baa 3844
59d6ffb2 3845 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 3846
3847 /* If this reloc is against an external symbol, we do
3848 not want to fiddle with the addend. Otherwise, we
3849 need to include the symbol value so that it becomes
3850 an addend for the dynamic reloc. */
0f88be7a 3851 if (! relocate)
252b5132
RH		 3852 continue;
3853 }
252b5132
RH		 3854 break;
3855
37e55690 3856 case R_386_TLS_IE:
0e1862bb 3857 if (!bfd_link_executable (info))
37e55690 3858 {
947216bf 3859 Elf_Internal_Rela outrel;
37e55690 3860 asection *sreloc;
37e55690
JJ		 3861
3862 outrel.r_offset = rel->r_offset
3863 + input_section->output_section->vma
3864 + input_section->output_offset;
3865 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3866 sreloc = elf_section_data (input_section)->sreloc;
3867 if (sreloc == NULL)
3868 abort ();
59d6ffb2 3869 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 3870 }
3871 /* Fall through */
3872
13ae64f3 3873 case R_386_TLS_GD:
67a4f2b7
AO		 3874 case R_386_TLS_GOTDESC:
3875 case R_386_TLS_DESC_CALL:
13ae64f3 3876 case R_386_TLS_IE_32:
37e55690 3877 case R_386_TLS_GOTIE:
13ae64f3
JJ		 3878 tls_type = GOT_UNKNOWN;
3879 if (h == NULL && local_got_offsets)
0afcef53 3880 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
13ae64f3 3881 else if (h != NULL)
0afcef53 3882 tls_type = elf_x86_hash_entry(h)->tls_type;
37e55690
JJ		 3883 if (tls_type == GOT_TLS_IE)
3884 tls_type = GOT_TLS_IE_NEG;
142411ca
L		 3885
3886 if (! elf_i386_tls_transition (info, input_bfd,
3887 input_section, contents,
3888 symtab_hdr, sym_hashes,
3889 &r_type, tls_type, rel,
bedfd056 3890 relend, h, r_symndx, TRUE))
142411ca 3891 return FALSE;
13ae64f3
JJ		 3892
3893 if (r_type == R_386_TLS_LE_32)
3894 {
82e51918 3895 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 3896 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3897 {
142411ca 3898 unsigned int type;
13ae64f3
JJ		 3899 bfd_vma roff;
3900
3901 /* GD->LE transition. */
6eaa7fb5 3902 type = *(contents + rel->r_offset - 2);
13ae64f3
JJ		 3903 if (type == 0x04)
3904 {
6eaa7fb5
L		 3905 /* Change
3906 leal foo@tlsgd(,%ebx,1), %eax
3907 call ___tls_get_addr@PLT
3908 into:
3909 movl %gs:0, %eax
3910 subl $foo@tpoff, %eax
13ae64f3 3911 (6 byte form of subl). */
142411ca 3912 roff = rel->r_offset + 5;
13ae64f3
JJ		 3913 }
3914 else
3915 {
6eaa7fb5
L		 3916 /* Change
3917 leal foo@tlsgd(%ebx), %eax
3918 call ___tls_get_addr@PLT
3919 nop
3920 or
3921 leal foo@tlsgd(%reg), %eax
3922 call *___tls_get_addr@GOT(%reg)
3923 which may be converted to
3924 addr32 call ___tls_get_addr
3925 into:
3926 movl %gs:0, %eax; subl $foo@tpoff, %eax
142411ca 3927 (6 byte form of subl). */
142411ca 3928 roff = rel->r_offset + 6;
13ae64f3 3929 }
6eaa7fb5
L		 3930 memcpy (contents + roff - 8,
3931 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
eb4ff4d6 3932 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 3933 contents + roff);
6eaa7fb5 3934 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
13ae64f3 3935 rel++;
60f2e42e 3936 wrel++;
13ae64f3
JJ		 3937 continue;
3938 }
67a4f2b7
AO		 3939 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3940 {
3941 /* GDesc -> LE transition.
3942 It's originally something like:
3943 leal x@tlsdesc(%ebx), %eax
3944
3945 leal x@ntpoff, %eax
3946
3947 Registers other than %eax may be set up here. */
3948
142411ca 3949 unsigned int val;
67a4f2b7
AO		 3950 bfd_vma roff;
3951
67a4f2b7 3952 roff = rel->r_offset;
67a4f2b7 3953 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 3954
3955 /* Now modify the instruction as appropriate. */
3956 /* aoliva FIXME: remove the above and xor the byte
3957 below with 0x86. */
3958 bfd_put_8 (output_bfd, val ^ 0x86,
3959 contents + roff - 1);
eb4ff4d6 3960 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 3961 contents + roff);
3962 continue;
3963 }
3964 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3965 {
3966 /* GDesc -> LE transition.
3967 It's originally:
3968 call *(%eax)
3969 Turn it into:
142411ca 3970 xchg %ax,%ax */
67a4f2b7 3971
67a4f2b7 3972 bfd_vma roff;
6bbec505 3973
67a4f2b7 3974 roff = rel->r_offset;
10efb593 3975 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3976 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3977 continue;
3978 }
37e55690 3979 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3 3980 {
142411ca 3981 unsigned int val;
13ae64f3
JJ		 3982
3983 /* IE->LE transition:
37e55690
JJ		 3984 Originally it can be one of:
3985 movl foo, %eax
3986 movl foo, %reg
3987 addl foo, %reg
3988 We change it into:
3989 movl $foo, %eax
3990 movl $foo, %reg
3991 addl $foo, %reg. */
37e55690 3992 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 3993 if (val == 0xa1)
3994 {
3995 /* movl foo, %eax. */
55fd94b0
AM		 3996 bfd_put_8 (output_bfd, 0xb8,
3997 contents + rel->r_offset - 1);
37e55690 3998 }
299bf759 3999 else
37e55690 4000 {
142411ca
L		 4001 unsigned int type;
4002
55fd94b0
AM		 4003 type = bfd_get_8 (input_bfd,
4004 contents + rel->r_offset - 2);
299bf759 4005 switch (type)
26e41594 4006 {
299bf759
L		 4007 case 0x8b:
4008 /* movl */
299bf759
L		 4009 bfd_put_8 (output_bfd, 0xc7,
4010 contents + rel->r_offset - 2);
4011 bfd_put_8 (output_bfd,
4012 0xc0 | ((val >> 3) & 7),
4013 contents + rel->r_offset - 1);
4014 break;
4015 case 0x03:
4016 /* addl */
299bf759
L		 4017 bfd_put_8 (output_bfd, 0x81,
4018 contents + rel->r_offset - 2);
4019 bfd_put_8 (output_bfd,
4020 0xc0 | ((val >> 3) & 7),
4021 contents + rel->r_offset - 1);
4022 break;
4023 default:
4024 BFD_FAIL ();
4025 break;
26e41594 4026 }
37e55690 4027 }
eb4ff4d6 4028 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4029 contents + rel->r_offset);
4030 continue;
4031 }
4032 else
4033 {
4034 unsigned int val, type;
4035
4036 /* {IE_32,GOTIE}->LE transition:
4037 Originally it can be one of:
13ae64f3 4038 subl foo(%reg1), %reg2
13ae64f3 4039 movl foo(%reg1), %reg2
37e55690 4040 addl foo(%reg1), %reg2
13ae64f3
JJ		 4041 We change it into:
4042 subl $foo, %reg2
37e55690
JJ		 4043 movl $foo, %reg2 (6 byte form)
4044 addl $foo, %reg2. */
13ae64f3
JJ		 4045 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4046 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 4047 if (type == 0x8b)
4048 {
4049 /* movl */
13ae64f3
JJ		 4050 bfd_put_8 (output_bfd, 0xc7,
4051 contents + rel->r_offset - 2);
4052 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4053 contents + rel->r_offset - 1);
4054 }
4055 else if (type == 0x2b)
4056 {
4057 /* subl */
13ae64f3
JJ		 4058 bfd_put_8 (output_bfd, 0x81,
4059 contents + rel->r_offset - 2);
4060 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4061 contents + rel->r_offset - 1);
4062 }
37e55690
JJ		 4063 else if (type == 0x03)
4064 {
4065 /* addl */
4066 bfd_put_8 (output_bfd, 0x81,
4067 contents + rel->r_offset - 2);
4068 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4069 contents + rel->r_offset - 1);
4070 }
13ae64f3
JJ		 4071 else
4072 BFD_FAIL ();
37e55690 4073 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
eb4ff4d6 4074 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4075 contents + rel->r_offset);
4076 else
eb4ff4d6 4077 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 4078 contents + rel->r_offset);
13ae64f3
JJ		 4079 continue;
4080 }
4081 }
4082
6de2ae4a 4083 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4084 abort ();
4085
4086 if (h != NULL)
67a4f2b7
AO		 4087 {
4088 off = h->got.offset;
0afcef53 4089 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
67a4f2b7 4090 }
13ae64f3
JJ		 4091 else
4092 {
4093 if (local_got_offsets == NULL)
4094 abort ();
4095
4096 off = local_got_offsets[r_symndx];
67a4f2b7 4097 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 4098 }
4099
4100 if ((off & 1) != 0)
4101 off &= ~1;
26e41594 4102 else
13ae64f3 4103 {
947216bf 4104 Elf_Internal_Rela outrel;
91d6fa6a 4105 int dr_type;
67a4f2b7 4106 asection *sreloc;
13ae64f3 4107
6de2ae4a 4108 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4109 abort ();
4110
67a4f2b7
AO		 4111 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4112
4113 if (GOT_TLS_GDESC_P (tls_type))
4114 {
59d6ffb2 4115 bfd_byte *loc;
67a4f2b7
AO		 4116 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4117 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 4118 <= htab->elf.sgotplt->size);
4119 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4120 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4121 + offplt
4122 + htab->sgotplt_jump_table_size);
6de2ae4a 4123 sreloc = htab->elf.srelplt;
67a4f2b7 4124 loc = sreloc->contents;
765e526c 4125 loc += (htab->next_tls_desc_index++
5ae0bfb6 4126 * sizeof (Elf32_External_Rel));
67a4f2b7 4127 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 4128 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 4129 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4130 if (indx == 0)
4131 {
4132 BFD_ASSERT (! unresolved_reloc);
4133 bfd_put_32 (output_bfd,
0afcef53 4134 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4135 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4136 + htab->sgotplt_jump_table_size + 4);
4137 }
4138 else
4139 {
4140 bfd_put_32 (output_bfd, 0,
6de2ae4a 4141 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4142 + htab->sgotplt_jump_table_size + 4);
4143 }
4144 }
4145
6de2ae4a 4146 sreloc = htab->elf.srelgot;
67a4f2b7 4147
6de2ae4a
L		 4148 outrel.r_offset = (htab->elf.sgot->output_section->vma
4149 + htab->elf.sgot->output_offset + off);
13ae64f3 4150
67a4f2b7 4151 if (GOT_TLS_GD_P (tls_type))
13ae64f3 4152 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 4153 else if (GOT_TLS_GDESC_P (tls_type))
4154 goto dr_done;
37e55690
JJ		 4155 else if (tls_type == GOT_TLS_IE_POS)
4156 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 4157 else
4158 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 4159
37e55690 4160 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6 4161 bfd_put_32 (output_bfd,
0afcef53 4162 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4163 htab->elf.sgot->contents + off);
37e55690 4164 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 4165 bfd_put_32 (output_bfd,
0afcef53 4166 _bfd_x86_elf_dtpoff_base (info) - relocation,
6de2ae4a 4167 htab->elf.sgot->contents + off);
67a4f2b7 4168 else if (dr_type != R_386_TLS_DESC)
c366c25e 4169 bfd_put_32 (output_bfd, 0,
6de2ae4a 4170 htab->elf.sgot->contents + off);
13ae64f3 4171 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 4172
59d6ffb2 4173 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 4174
67a4f2b7 4175 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 4176 {
4177 if (indx == 0)
4178 {
82e51918 4179 BFD_ASSERT (! unresolved_reloc);
13ae64f3 4180 bfd_put_32 (output_bfd,
0afcef53 4181 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4182 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4183 }
4184 else
4185 {
4186 bfd_put_32 (output_bfd, 0,
6de2ae4a 4187 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4188 outrel.r_info = ELF32_R_INFO (indx,
4189 R_386_TLS_DTPOFF32);
4190 outrel.r_offset += 4;
59d6ffb2 4191 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 4192 }
4193 }
37e55690
JJ		 4194 else if (tls_type == GOT_TLS_IE_BOTH)
4195 {
4196 bfd_put_32 (output_bfd,
eb4ff4d6 4197 (indx == 0
0afcef53 4198 ? relocation - _bfd_x86_elf_dtpoff_base (info)
eb4ff4d6 4199 : 0),
6de2ae4a 4200 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 4201 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4202 outrel.r_offset += 4;
59d6ffb2 4203 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 4204 }
13ae64f3 4205
67a4f2b7 4206 dr_done:
13ae64f3
JJ		 4207 if (h != NULL)
4208 h->got.offset |= 1;
4209 else
4210 local_got_offsets[r_symndx] |= 1;
4211 }
4212
67a4f2b7
AO		 4213 if (off >= (bfd_vma) -2
4214 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 4215 abort ();
67a4f2b7
AO		 4216 if (r_type == R_386_TLS_GOTDESC
4217 || r_type == R_386_TLS_DESC_CALL)
4218 {
4219 relocation = htab->sgotplt_jump_table_size + offplt;
4220 unresolved_reloc = FALSE;
4221 }
4222 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 4223 {
6de2ae4a
L		 4224 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4225 + htab->elf.sgotplt->output_offset;
4226 relocation = htab->elf.sgot->output_section->vma
4227 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 4228 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4229 && tls_type == GOT_TLS_IE_BOTH)
4230 relocation += 4;
4231 if (r_type == R_386_TLS_IE)
8c37241b 4232 relocation += g_o_t;
b34976b6 4233 unresolved_reloc = FALSE;
13ae64f3 4234 }
67a4f2b7 4235 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ		 4236 {
4237 unsigned int val, type;
4238 bfd_vma roff;
4239
4240 /* GD->IE transition. */
6eaa7fb5
L		 4241 type = *(contents + rel->r_offset - 2);
4242 val = *(contents + rel->r_offset - 1);
13ae64f3
JJ		 4243 if (type == 0x04)
4244 {
6eaa7fb5
L		 4245 /* Change
4246 leal foo@tlsgd(,%ebx,1), %eax
4247 call ___tls_get_addr@PLT
4248 into:
4249 movl %gs:0, %eax
4250 subl $foo@gottpoff(%ebx), %eax. */
13ae64f3 4251 val >>= 3;
142411ca 4252 roff = rel->r_offset - 3;
13ae64f3
JJ		 4253 }
4254 else
4255 {
6eaa7fb5
L		 4256 /* Change
4257 leal foo@tlsgd(%ebx), %eax
4258 call ___tls_get_addr@PLT
4259 nop
4260 or
4261 leal foo@tlsgd(%reg), %eax
4262 call *___tls_get_addr@GOT(%reg)
4263 which may be converted to
4264 addr32 call ___tls_get_addr
4265 into:
4266 movl %gs:0, %eax;
4267 subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 4268 roff = rel->r_offset - 2;
4269 }
4270 memcpy (contents + roff,
4271 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4272 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 4273 /* If foo is used only with foo@gotntpoff(%reg) and
4274 foo@indntpoff, but not with foo@gottpoff(%reg), change
4275 subl $foo@gottpoff(%reg), %eax
4276 into:
4277 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 4278 if (tls_type == GOT_TLS_IE_POS)
4279 contents[roff + 6] = 0x03;
8c37241b 4280 bfd_put_32 (output_bfd,
6de2ae4a
L		 4281 htab->elf.sgot->output_section->vma
4282 + htab->elf.sgot->output_offset + off
4283 - htab->elf.sgotplt->output_section->vma
4284 - htab->elf.sgotplt->output_offset,
13ae64f3 4285 contents + roff + 8);
6eaa7fb5 4286 /* Skip R_386_PLT32 and R_386_GOT32X. */
13ae64f3 4287 rel++;
60f2e42e 4288 wrel++;
13ae64f3
JJ		 4289 continue;
4290 }
67a4f2b7
AO		 4291 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4292 {
4293 /* GDesc -> IE transition.
4294 It's originally something like:
4295 leal x@tlsdesc(%ebx), %eax
4296
4297 Change it to:
142411ca 4298 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 4299 or:
4300 movl x@gottpoff(%ebx), %eax # before negl %eax
4301
4302 Registers other than %eax may be set up here. */
4303
67a4f2b7
AO		 4304 bfd_vma roff;
4305
4306 /* First, make sure it's a leal adding ebx to a 32-bit
4307 offset into any register, although it's probably
4308 almost always going to be eax. */
4309 roff = rel->r_offset;
67a4f2b7
AO		 4310
4311 /* Now modify the instruction as appropriate. */
4312 /* To turn a leal into a movl in the form we use it, it
4313 suffices to change the first byte from 0x8d to 0x8b.
4314 aoliva FIXME: should we decide to keep the leal, all
4315 we have to do is remove the statement below, and
4316 adjust the relaxation of R_386_TLS_DESC_CALL. */
4317 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4318
4319 if (tls_type == GOT_TLS_IE_BOTH)
4320 off += 4;
4321
4322 bfd_put_32 (output_bfd,
6de2ae4a
L		 4323 htab->elf.sgot->output_section->vma
4324 + htab->elf.sgot->output_offset + off
4325 - htab->elf.sgotplt->output_section->vma
4326 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 4327 contents + roff);
4328 continue;
4329 }
4330 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4331 {
4332 /* GDesc -> IE transition.
4333 It's originally:
4334 call *(%eax)
4335
4336 Change it to:
142411ca 4337 xchg %ax,%ax
67a4f2b7
AO		 4338 or
4339 negl %eax
4340 depending on how we transformed the TLS_GOTDESC above.
4341 */
4342
67a4f2b7
AO		 4343 bfd_vma roff;
4344
67a4f2b7 4345 roff = rel->r_offset;
67a4f2b7
AO		 4346
4347 /* Now modify the instruction as appropriate. */
4348 if (tls_type != GOT_TLS_IE_NEG)
4349 {
10efb593
L		 4350 /* xchg %ax,%ax */
4351 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4352 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4353 }
4354 else
4355 {
4356 /* negl %eax */
4357 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4358 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4359 }
4360
4361 continue;
4362 }
4363 else
4364 BFD_ASSERT (FALSE);
13ae64f3
JJ		 4365 break;
4366
4367 case R_386_TLS_LDM:
142411ca
L		 4368 if (! elf_i386_tls_transition (info, input_bfd,
4369 input_section, contents,
4370 symtab_hdr, sym_hashes,
4371 &r_type, GOT_UNKNOWN, rel,
bedfd056 4372 relend, h, r_symndx, TRUE))
142411ca 4373 return FALSE;
13ae64f3 4374
142411ca
L		 4375 if (r_type != R_386_TLS_LDM)
4376 {
6eaa7fb5
L		 4377 /* LD->LE transition. Change
4378 leal foo@tlsldm(%ebx) %eax
4379 call ___tls_get_addr@PLT
4380 into:
4381 movl %gs:0, %eax
4382 nop
4383 leal 0(%esi,1), %esi
4384 or change
4385 leal foo@tlsldm(%reg) %eax
4386 call *___tls_get_addr@GOT(%reg)
4387 which may be converted to
4388 addr32 call ___tls_get_addr
4389 into:
4390 movl %gs:0, %eax
4391 leal 0(%esi), %esi */
142411ca 4392 BFD_ASSERT (r_type == R_386_TLS_LE_32);
6eaa7fb5
L		 4393 if (*(contents + rel->r_offset + 4) == 0xff
4394 || *(contents + rel->r_offset + 4) == 0x67)
4395 memcpy (contents + rel->r_offset - 2,
4396 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
4397 else
4398 memcpy (contents + rel->r_offset - 2,
4399 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 4400 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 4401 rel++;
60f2e42e 4402 wrel++;
13ae64f3
JJ		 4403 continue;
4404 }
4405
6de2ae4a 4406 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4407 abort ();
4408
0afcef53 4409 off = htab->tls_ld_or_ldm_got.offset;
13ae64f3
JJ		 4410 if (off & 1)
4411 off &= ~1;
4412 else
4413 {
947216bf 4414 Elf_Internal_Rela outrel;
13ae64f3 4415
6de2ae4a 4416 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4417 abort ();
4418
6de2ae4a
L		 4419 outrel.r_offset = (htab->elf.sgot->output_section->vma
4420 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 4421
4422 bfd_put_32 (output_bfd, 0,
6de2ae4a 4423 htab->elf.sgot->contents + off);
13ae64f3 4424 bfd_put_32 (output_bfd, 0,
6de2ae4a 4425 htab->elf.sgot->contents + off + 4);
13ae64f3 4426 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 4427 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
0afcef53 4428 htab->tls_ld_or_ldm_got.offset |= 1;
13ae64f3 4429 }
6de2ae4a
L		 4430 relocation = htab->elf.sgot->output_section->vma
4431 + htab->elf.sgot->output_offset + off
4432 - htab->elf.sgotplt->output_section->vma
4433 - htab->elf.sgotplt->output_offset;
b34976b6 4434 unresolved_reloc = FALSE;
13ae64f3
JJ		 4435 break;
4436
4437 case R_386_TLS_LDO_32:
0e1862bb
L		 4438 if (!bfd_link_executable (info)
4439 || (input_section->flags & SEC_CODE) == 0)
0afcef53 4440 relocation -= _bfd_x86_elf_dtpoff_base (info);
13ae64f3
JJ		 4441 else
4442 /* When converting LDO to LE, we must negate. */
eb4ff4d6 4443 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4444 break;
4445
4446 case R_386_TLS_LE_32:
13ae64f3 4447 case R_386_TLS_LE:
0e1862bb 4448 if (!bfd_link_executable (info))
37e55690 4449 {
947216bf 4450 Elf_Internal_Rela outrel;
37e55690 4451 asection *sreloc;
37e55690
JJ		 4452
4453 outrel.r_offset = rel->r_offset
4454 + input_section->output_section->vma
4455 + input_section->output_offset;
4456 if (h != NULL && h->dynindx != -1)
4457 indx = h->dynindx;
4458 else
4459 indx = 0;
4460 if (r_type == R_386_TLS_LE_32)
4461 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4462 else
4463 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4464 sreloc = elf_section_data (input_section)->sreloc;
4465 if (sreloc == NULL)
4466 abort ();
59d6ffb2 4467 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 4468 if (indx)
4469 continue;
4470 else if (r_type == R_386_TLS_LE_32)
0afcef53 4471 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
37e55690 4472 else
0afcef53 4473 relocation -= _bfd_x86_elf_dtpoff_base (info);
37e55690
JJ		 4474 }
4475 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4476 relocation = elf_i386_tpoff (info, relocation);
37e55690 4477 else
eb4ff4d6 4478 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4479 break;
4480
252b5132
RH		 4481 default:
4482 break;
4483 }
4484
239e1f3a
AM		 4485 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4486 because such sections are not SEC_ALLOC and thus ld.so will
4487 not process them. */
8c694914 4488 if (unresolved_reloc
239e1f3a 4489 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4490 && h->def_dynamic)
4491 && _bfd_elf_section_offset (output_bfd, info, input_section,
4492 rel->r_offset) != (bfd_vma) -1)
6a30718d 4493 {
4eca0228 4494 _bfd_error_handler
695344c0 4495 /* xgettext:c-format */
d42c267e 4496 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 4497 input_bfd,
4498 input_section,
d42c267e 4499 rel->r_offset,
843fe662 4500 howto->name,
6a30718d 4501 h->root.root.string);
b34976b6 4502 return FALSE;
6a30718d 4503 }
83be169b 4504
cbe950e9 4505do_relocation:
252b5132
RH		 4506 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4507 contents, rel->r_offset,
55fd94b0 4508 relocation, 0);
252b5132 4509
62d78908 4510check_relocation_error:
cf5c0c5b 4511 if (r != bfd_reloc_ok)
252b5132 4512 {
cf5c0c5b 4513 const char *name;
ffb2e45b 4514
cf5c0c5b
AM		 4515 if (h != NULL)
4516 name = h->root.root.string;
4517 else
4518 {
4519 name = bfd_elf_string_from_elf_section (input_bfd,
4520 symtab_hdr->sh_link,
4521 sym->st_name);
4522 if (name == NULL)
b34976b6 4523 return FALSE;
cf5c0c5b
AM		 4524 if (*name == '\0')
4525 name = bfd_section_name (input_bfd, sec);
4526 }
ffb2e45b 4527
cf5c0c5b 4528 if (r == bfd_reloc_overflow)
1a72702b
AM		 4529 (*info->callbacks->reloc_overflow)
4530 (info, (h ? &h->root : NULL), name, howto->name,
4531 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
cf5c0c5b
AM		 4532 else
4533 {
4eca0228 4534 _bfd_error_handler
695344c0 4535 /* xgettext:c-format */
d42c267e 4536 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
d003868e 4537 input_bfd, input_section,
d42c267e 4538 rel->r_offset, name, (int) r);
b34976b6 4539 return FALSE;
cf5c0c5b 4540 }
252b5132 4541 }
60f2e42e
L		 4542
4543 if (wrel != rel)
4544 *wrel = *rel;
4545 }
4546
4547 if (wrel != rel)
4548 {
4549 Elf_Internal_Shdr *rel_hdr;
4550 size_t deleted = rel - wrel;
4551
4552 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4553 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4554 if (rel_hdr->sh_size == 0)
4555 {
4556 /* It is too late to remove an empty reloc section. Leave
4557 one NONE reloc.
4558 ??? What is wrong with an empty section??? */
4559 rel_hdr->sh_size = rel_hdr->sh_entsize;
4560 deleted -= 1;
4561 }
4562 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4563 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4564 input_section->reloc_count -= deleted;
252b5132
RH		 4565 }
4566
b34976b6 4567 return TRUE;
252b5132
RH		 4568}
4569
4570/* Finish up dynamic symbol handling. We set the contents of various
4571 dynamic sections here. */
4572
b34976b6 4573static bfd_boolean
55fd94b0
AM		 4574elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4575 struct bfd_link_info *info,
4576 struct elf_link_hash_entry *h,
4577 Elf_Internal_Sym *sym)
252b5132 4578{
0afcef53 4579 struct elf_x86_link_hash_table *htab;
25e762b9 4580 unsigned plt_entry_size;
0afcef53 4581 struct elf_x86_link_hash_entry *eh;
aec6b87e 4582 bfd_boolean local_undefweak;
ee2fdd6f 4583 bfd_boolean use_plt_second;
252b5132 4584
0afcef53 4585 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 4586 if (htab == NULL)
4587 return FALSE;
252b5132 4588
765e526c 4589 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 4590
ee2fdd6f
L		 4591 /* Use the second PLT section only if there is .plt section. */
4592 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4593
0afcef53 4594 eh = (struct elf_x86_link_hash_entry *) h;
e133d005
L		 4595 if (eh->no_finish_dynamic_symbol)
4596 abort ();
dd7e64d4 4597
aec6b87e
L		 4598 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4599 resolved undefined weak symbols in executable so that their
4600 references have value 0 at run-time. */
0afcef53 4601 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA,
e62b9723
L		 4602 eh->has_got_reloc,
4603 eh);
aec6b87e 4604
252b5132
RH		 4605 if (h->plt.offset != (bfd_vma) -1)
4606 {
ee2fdd6f 4607 bfd_vma plt_index, plt_offset;
252b5132 4608 bfd_vma got_offset;
947216bf
AM		 4609 Elf_Internal_Rela rel;
4610 bfd_byte *loc;
ee2fdd6f 4611 asection *plt, *resolved_plt, *gotplt, *relplt;
cbe950e9
L		 4612
4613 /* When building a static executable, use .iplt, .igot.plt and
4614 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4615 if (htab->elf.splt != NULL)
cbe950e9 4616 {
6de2ae4a
L		 4617 plt = htab->elf.splt;
4618 gotplt = htab->elf.sgotplt;
4619 relplt = htab->elf.srelplt;
cbe950e9
L		 4620 }
4621 else
4622 {
6de2ae4a
L		 4623 plt = htab->elf.iplt;
4624 gotplt = htab->elf.igotplt;
4625 relplt = htab->elf.irelplt;
cbe950e9 4626 }
252b5132
RH		 4627
4628 /* This symbol has an entry in the procedure linkage table. Set
4629 it up. */
4630
cbe950e9 4631 if ((h->dynindx == -1
aec6b87e 4632 && !local_undefweak
0e1862bb 4633 && !((h->forced_local || bfd_link_executable (info))
cbe950e9
L		 4634 && h->def_regular
4635 && h->type == STT_GNU_IFUNC))
4636 || plt == NULL
4637 || gotplt == NULL
4638 || relplt == NULL)
cec7f46a 4639 abort ();
252b5132
RH		 4640
4641 /* Get the index in the procedure linkage table which
4642 corresponds to this symbol. This is the index of this symbol
4643 in all the symbols for which we are making plt entries. The
cbe950e9 4644 first entry in the procedure linkage table is reserved.
252b5132 4645
cbe950e9 4646 Get the offset into the .got table of the entry that
252b5132 4647 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 4648 The first three are reserved.
6bbec505 4649
cbe950e9
L		 4650 For static executables, we don't reserve anything. */
4651
6de2ae4a 4652 if (plt == htab->elf.splt)
cbe950e9 4653 {
f604c2a2 4654 got_offset = (h->plt.offset / plt_entry_size
765e526c 4655 - htab->plt.has_plt0);
e1f98742 4656 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 4657 }
4658 else
4659 {
e1f98742
L		 4660 got_offset = h->plt.offset / plt_entry_size;
4661 got_offset = got_offset * 4;
cbe950e9 4662 }
252b5132 4663
f604c2a2
L		 4664 /* Fill in the entry in the procedure linkage table and update
4665 the first slot. */
765e526c 4666 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
f604c2a2 4667 plt_entry_size);
ee2fdd6f
L		 4668
4669 if (use_plt_second)
4670 {
4671 const bfd_byte *plt_entry;
4672 if (bfd_link_pic (info))
765e526c 4673 plt_entry = htab->non_lazy_plt->pic_plt_entry;
ee2fdd6f 4674 else
765e526c 4675 plt_entry = htab->non_lazy_plt->plt_entry;
ee2fdd6f 4676 memcpy (htab->plt_second->contents + eh->plt_second.offset,
765e526c 4677 plt_entry, htab->non_lazy_plt->plt_entry_size);
ee2fdd6f
L		 4678
4679 resolved_plt = htab->plt_second;
4680 plt_offset = eh->plt_second.offset;
4681 }
4682 else
4683 {
4684 resolved_plt = plt;
4685 plt_offset = h->plt.offset;
4686 }
4687
0e1862bb 4688 if (! bfd_link_pic (info))
252b5132 4689 {
252b5132 4690 bfd_put_32 (output_bfd,
cbe950e9
L		 4691 (gotplt->output_section->vma
4692 + gotplt->output_offset
252b5132 4693 + got_offset),
ee2fdd6f 4694 resolved_plt->contents + plt_offset
765e526c 4695 + htab->plt.plt_got_offset);
eac338cf 4696
9a742a90 4697 if (htab->is_vxworks)
eac338cf
PB		 4698 {
4699 int s, k, reloc_index;
4700
4701 /* Create the R_386_32 relocation referencing the GOT
4702 for this PLT entry. */
4703
4704 /* S: Current slot number (zero-based). */
765e526c
L		 4705 s = ((h->plt.offset - htab->plt.plt_entry_size)
4706 / htab->plt.plt_entry_size);
eac338cf 4707 /* K: Number of relocations for PLTResolve. */
0e1862bb 4708 if (bfd_link_pic (info))
eac338cf
PB		 4709 k = PLTRESOLVE_RELOCS_SHLIB;
4710 else
4711 k = PLTRESOLVE_RELOCS;
4712 /* Skip the PLTresolve relocations, and the relocations for
4713 the other PLT slots. */
4714 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
765e526c 4715 loc = (htab->srelplt2->contents + reloc_index
eac338cf
PB		 4716 * sizeof (Elf32_External_Rel));
4717
ee2fdd6f
L		 4718 rel.r_offset = (plt->output_section->vma
4719 + plt->output_offset
eac338cf 4720 + h->plt.offset + 2),
7325306f 4721 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 4722 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4723
4724 /* Create the R_386_32 relocation referencing the beginning of
4725 the PLT for this GOT entry. */
6de2ae4a
L		 4726 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4727 + htab->elf.sgotplt->output_offset
eac338cf 4728 + got_offset);
7325306f 4729 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 4730 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 4731 loc + sizeof (Elf32_External_Rel));
eac338cf 4732 }
252b5132
RH		 4733 }
4734 else
4735 {
252b5132 4736 bfd_put_32 (output_bfd, got_offset,
ee2fdd6f 4737 resolved_plt->contents + plt_offset
765e526c 4738 + htab->plt.plt_got_offset);
252b5132
RH		 4739 }
4740
aec6b87e
L		 4741 /* Fill in the entry in the global offset table. Leave the entry
4742 as zero for undefined weak symbol in PIE. No PLT relocation
4743 against undefined weak symbol in PIE. */
4744 if (!local_undefweak)
cbe950e9 4745 {
765e526c 4746 if (htab->plt.has_plt0)
f604c2a2
L		 4747 bfd_put_32 (output_bfd,
4748 (plt->output_section->vma
4749 + plt->output_offset
4750 + h->plt.offset
765e526c 4751 + htab->lazy_plt->plt_lazy_offset),
f604c2a2 4752 gotplt->contents + got_offset);
252b5132 4753
aec6b87e
L		 4754 /* Fill in the entry in the .rel.plt section. */
4755 rel.r_offset = (gotplt->output_section->vma
4756 + gotplt->output_offset
4757 + got_offset);
4758 if (h->dynindx == -1
4759 || ((bfd_link_executable (info)
4760 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4761 && h->def_regular
4762 && h->type == STT_GNU_IFUNC))
4763 {
6322e5c5
L		 4764 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4765 h->root.root.string,
4766 h->root.u.def.section->owner);
4767
aec6b87e
L		 4768 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4769 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4770 in the .got.plt section. */
4771 bfd_put_32 (output_bfd,
4772 (h->root.u.def.value
4773 + h->root.u.def.section->output_section->vma
4774 + h->root.u.def.section->output_offset),
4775 gotplt->contents + got_offset);
4776 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4777 /* R_386_IRELATIVE comes last. */
4778 plt_index = htab->next_irelative_index--;
4779 }
4780 else
4781 {
4782 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4783 plt_index = htab->next_jump_slot_index++;
4784 }
4785
4786 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4787 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4788
f604c2a2
L		 4789 /* Don't fill the second and third slots in PLT entry for
4790 static executables nor without PLT0. */
765e526c 4791 if (plt == htab->elf.splt && htab->plt.has_plt0)
aec6b87e
L		 4792 {
4793 bfd_put_32 (output_bfd,
4794 plt_index * sizeof (Elf32_External_Rel),
4795 plt->contents + h->plt.offset
765e526c 4796 + htab->lazy_plt->plt_reloc_offset);
f604c2a2
L		 4797 bfd_put_32 (output_bfd,
4798 - (h->plt.offset
765e526c 4799 + htab->lazy_plt->plt_plt_offset + 4),
f604c2a2 4800 (plt->contents + h->plt.offset
765e526c 4801 + htab->lazy_plt->plt_plt_offset));
aec6b87e 4802 }
e1f98742 4803 }
dd7e64d4
L		 4804 }
4805 else if (eh->plt_got.offset != (bfd_vma) -1)
4806 {
4807 bfd_vma got_offset, plt_offset;
4808 asection *plt, *got, *gotplt;
4809 const bfd_byte *got_plt_entry;
4810
dd7e64d4
L		 4811 /* Set the entry in the GOT procedure linkage table. */
4812 plt = htab->plt_got;
4813 got = htab->elf.sgot;
4814 gotplt = htab->elf.sgotplt;
4815 got_offset = h->got.offset;
4816
4817 if (got_offset == (bfd_vma) -1
4818 || plt == NULL
4819 || got == NULL
4820 || gotplt == NULL)
4821 abort ();
4822
4823 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 4824 if (! bfd_link_pic (info))
252b5132 4825 {
765e526c 4826 got_plt_entry = htab->non_lazy_plt->plt_entry;
dd7e64d4 4827 got_offset += got->output_section->vma + got->output_offset;
252b5132 4828 }
dd7e64d4
L		 4829 else
4830 {
765e526c 4831 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
dd7e64d4
L		 4832 got_offset += (got->output_section->vma
4833 + got->output_offset
4834 - gotplt->output_section->vma
4835 - gotplt->output_offset);
4836 }
4837
4838 plt_offset = eh->plt_got.offset;
4839 memcpy (plt->contents + plt_offset, got_plt_entry,
765e526c 4840 htab->non_lazy_plt->plt_entry_size);
dd7e64d4 4841 bfd_put_32 (output_bfd, got_offset,
f604c2a2 4842 (plt->contents + plt_offset
765e526c 4843 + htab->non_lazy_plt->plt_got_offset));
dd7e64d4
L		 4844 }
4845
aec6b87e
L		 4846 if (!local_undefweak
4847 && !h->def_regular
dd7e64d4
L		 4848 && (h->plt.offset != (bfd_vma) -1
4849 || eh->plt_got.offset != (bfd_vma) -1))
4850 {
4851 /* Mark the symbol as undefined, rather than as defined in
4852 the .plt section. Leave the value if there were any
4853 relocations where pointer equality matters (this is a clue
4854 for the dynamic linker, to make function pointer
4855 comparisons work between an application and shared
4856 library), otherwise set it to zero. If a function is only
4857 called from a binary, there is no need to slow down
4858 shared libraries because of that. */
4859 sym->st_shndx = SHN_UNDEF;
4860 if (!h->pointer_equality_needed)
4861 sym->st_value = 0;
252b5132
RH		 4862 }
4863
aec6b87e
L		 4864 /* Don't generate dynamic GOT relocation against undefined weak
4865 symbol in executable. */
13ae64f3 4866 if (h->got.offset != (bfd_vma) -1
0afcef53
L		 4867 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
4868 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
aec6b87e 4869 && !local_undefweak)
252b5132 4870 {
947216bf 4871 Elf_Internal_Rela rel;
233cc9c1 4872 asection *relgot = htab->elf.srelgot;
252b5132
RH		 4873
4874 /* This symbol has an entry in the global offset table. Set it
4875 up. */
4876
6de2ae4a 4877 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 4878 abort ();
252b5132 4879
6de2ae4a
L		 4880 rel.r_offset = (htab->elf.sgot->output_section->vma
4881 + htab->elf.sgot->output_offset
dc810e39 4882 + (h->got.offset & ~(bfd_vma) 1));
252b5132 4883
dd5724d5
AM		 4884 /* If this is a static link, or it is a -Bsymbolic link and the
4885 symbol is defined locally or was forced to be local because
4886 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 4887 The entry in the global offset table will already have been
4888 initialized in the relocate_section function. */
710ab287 4889 if (h->def_regular
0018b0a3
L		 4890 && h->type == STT_GNU_IFUNC)
4891 {
233cc9c1
L		 4892 if (h->plt.offset == (bfd_vma) -1)
4893 {
4894 /* STT_GNU_IFUNC is referenced without PLT. */
4895 if (htab->elf.splt == NULL)
4896 {
4897 /* use .rel[a].iplt section to store .got relocations
4898 in static executable. */
4899 relgot = htab->elf.irelplt;
4900 }
4901 if (SYMBOL_REFERENCES_LOCAL (info, h))
4902 {
6322e5c5
L		 4903 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4904 h->root.root.string,
4905 h->root.u.def.section->owner);
4906
233cc9c1
L		 4907 bfd_put_32 (output_bfd,
4908 (h->root.u.def.value
4909 + h->root.u.def.section->output_section->vma
4910 + h->root.u.def.section->output_offset),
4911 htab->elf.sgot->contents + h->got.offset);
4912 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4913 }
4914 else
4915 goto do_glob_dat;
4916 }
4917 else if (bfd_link_pic (info))
710ab287
L		 4918 {
4919 /* Generate R_386_GLOB_DAT. */
4920 goto do_glob_dat;
4921 }
4922 else
4923 {
cd2b2c10 4924 asection *plt;
ee2fdd6f 4925 bfd_vma plt_offset;
cd2b2c10 4926
710ab287
L		 4927 if (!h->pointer_equality_needed)
4928 abort ();
4929
4930 /* For non-shared object, we can't use .got.plt, which
4931 contains the real function addres if we need pointer
4932 equality. We load the GOT entry with the PLT entry. */
ee2fdd6f
L		 4933 if (htab->plt_second != NULL)
4934 {
4935 plt = htab->plt_second;
4936 plt_offset = eh->plt_second.offset;
4937 }
4938 else
4939 {
4940 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4941 plt_offset = h->plt.offset;
4942 }
710ab287
L		 4943 bfd_put_32 (output_bfd,
4944 (plt->output_section->vma
ee2fdd6f 4945 + plt->output_offset + plt_offset),
6de2ae4a 4946 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 4947 return TRUE;
4948 }
0018b0a3 4949 }
0e1862bb 4950 else if (bfd_link_pic (info)
0018b0a3 4951 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 4952 {
6725bdbf 4953 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 4954 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4955 }
252b5132
RH		 4956 else
4957 {
dd5724d5 4958 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4959do_glob_dat:
6725bdbf 4960 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 4961 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 4962 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4963 }
4964
233cc9c1 4965 elf_append_rel (output_bfd, relgot, &rel);
252b5132
RH		 4966 }
4967
f5385ebf 4968 if (h->needs_copy)
252b5132 4969 {
947216bf 4970 Elf_Internal_Rela rel;
5474d94f 4971 asection *s;
252b5132
RH		 4972
4973 /* This symbol needs a copy reloc. Set it up. */
4974
ffb2e45b
AM		 4975 if (h->dynindx == -1
4976 || (h->root.type != bfd_link_hash_defined
4977 && h->root.type != bfd_link_hash_defweak)
5474d94f
AM		 4978 || htab->elf.srelbss == NULL
4979 || htab->elf.sreldynrelro == NULL)
ffb2e45b 4980 abort ();
252b5132
RH		 4981
4982 rel.r_offset = (h->root.u.def.value
4983 + h->root.u.def.section->output_section->vma
4984 + h->root.u.def.section->output_offset);
4985 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
afbf7e8e 4986 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 4987 s = htab->elf.sreldynrelro;
4988 else
4989 s = htab->elf.srelbss;
4990 elf_append_rel (output_bfd, s, &rel);
252b5132
RH		 4991 }
4992
b34976b6 4993 return TRUE;
252b5132
RH		 4994}
4995
c25bc9fc
L		 4996/* Finish up local dynamic symbol handling. We set the contents of
4997 various dynamic sections here. */
4998
4999static bfd_boolean
5000elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5001{
5002 struct elf_link_hash_entry *h
5003 = (struct elf_link_hash_entry *) *slot;
5004 struct bfd_link_info *info
23209a78 5005 = (struct bfd_link_info *) inf;
c25bc9fc
L		 5006
5007 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5008 h, NULL);
5009}
5010
aec6b87e
L		 5011/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5012 here since undefined weak symbol may not be dynamic and may not be
5013 called for elf_i386_finish_dynamic_symbol. */
5014
5015static bfd_boolean
5016elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5017 void *inf)
5018{
5019 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5020 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5021
5022 if (h->root.type != bfd_link_hash_undefweak
5023 || h->dynindx != -1)
5024 return TRUE;
5025
5026 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5f0f0847 5027 info, h, NULL);
aec6b87e
L		 5028}
5029
38701953
AM		 5030/* Used to decide how to sort relocs in an optimal manner for the
5031 dynamic linker, before writing them out. */
5032
5033static enum elf_reloc_type_class
cae1fbbb 5034elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 5035 const asection *rel_sec ATTRIBUTE_UNUSED,
5036 const Elf_Internal_Rela *rela)
38701953 5037{
cae1fbbb
L		 5038 bfd *abfd = info->output_bfd;
5039 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5040 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 5041
d9e3b590
L		 5042 if (htab->dynsym != NULL
5043 && htab->dynsym->contents != NULL)
5044 {
5045 /* Check relocation against STT_GNU_IFUNC symbol if there are
5046 dynamic symbols. */
5047 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
c428ce9d
L		 5048 if (r_symndx != STN_UNDEF)
5049 {
5050 Elf_Internal_Sym sym;
5051 if (!bed->s->swap_symbol_in (abfd,
5052 (htab->dynsym->contents
5053 + r_symndx * sizeof (Elf32_External_Sym)),
5054 0, &sym))
5055 abort ();
d9e3b590 5056
c428ce9d
L		 5057 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5058 return reloc_class_ifunc;
5059 }
d9e3b590 5060 }
cae1fbbb 5061
55fd94b0 5062 switch (ELF32_R_TYPE (rela->r_info))
38701953 5063 {
c428ce9d
L		 5064 case R_386_IRELATIVE:
5065 return reloc_class_ifunc;
38701953
AM		 5066 case R_386_RELATIVE:
5067 return reloc_class_relative;
5068 case R_386_JUMP_SLOT:
5069 return reloc_class_plt;
5070 case R_386_COPY:
5071 return reloc_class_copy;
5072 default:
5073 return reloc_class_normal;
5074 }
5075}
5076
252b5132
RH		 5077/* Finish up the dynamic sections. */
5078
b34976b6 5079static bfd_boolean
55fd94b0
AM		 5080elf_i386_finish_dynamic_sections (bfd *output_bfd,
5081 struct bfd_link_info *info)
252b5132 5082{
0afcef53 5083 struct elf_x86_link_hash_table *htab;
252b5132 5084 bfd *dynobj;
252b5132 5085 asection *sdyn;
25e762b9 5086 const struct elf_i386_backend_data *abed;
252b5132 5087
0afcef53 5088 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 5089 if (htab == NULL)
5090 return FALSE;
5091
ebe50bae 5092 dynobj = htab->elf.dynobj;
3d4d4302 5093 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
25e762b9 5094 abed = get_elf_i386_backend_data (output_bfd);
252b5132 5095
ebe50bae 5096 if (htab->elf.dynamic_sections_created)
252b5132 5097 {
252b5132
RH		 5098 Elf32_External_Dyn *dyncon, *dynconend;
5099
6de2ae4a 5100 if (sdyn == NULL || htab->elf.sgot == NULL)
ffb2e45b 5101 abort ();
252b5132
RH		 5102
5103 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 5104 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 5105 for (; dyncon < dynconend; dyncon++)
5106 {
5107 Elf_Internal_Dyn dyn;
51b64d56 5108 asection *s;
252b5132
RH		 5109
5110 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5111
5112 switch (dyn.d_tag)
5113 {
5114 default:
9a742a90 5115 if (htab->is_vxworks
25e762b9 5116 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7a2b07ff 5117 break;
0ac8d2ca 5118 continue;
252b5132
RH		 5119
5120 case DT_PLTGOT:
6de2ae4a 5121 s = htab->elf.sgotplt;
8c37241b 5122 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 5123 break;
5124
252b5132 5125 case DT_JMPREL:
6de2ae4a 5126 s = htab->elf.srelplt;
6348e046 5127 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 5128 break;
5129
5130 case DT_PLTRELSZ:
6de2ae4a 5131 s = htab->elf.srelplt;
eea6121a 5132 dyn.d_un.d_val = s->size;
252b5132 5133 break;
252b5132 5134 }
0ac8d2ca
AM		 5135
5136 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 5137 }
5138
6de2ae4a 5139 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 5140 {
1f78f649
L		 5141 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5142 really seem like the right value. */
5143 elf_section_data (htab->elf.splt->output_section)
5144 ->this_hdr.sh_entsize = 4;
5145
765e526c 5146 if (htab->plt.has_plt0)
252b5132 5147 {
f604c2a2
L		 5148 /* Fill in the special first entry in the procedure linkage
5149 table. */
765e526c
L		 5150 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
5151 htab->lazy_plt->plt0_entry_size);
5152 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
25e762b9 5153 abed->plt0_pad_byte,
765e526c 5154 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
f604c2a2 5155 if (!bfd_link_pic (info))
eac338cf 5156 {
f604c2a2
L		 5157 bfd_put_32 (output_bfd,
5158 (htab->elf.sgotplt->output_section->vma
5159 + htab->elf.sgotplt->output_offset
5160 + 4),
5161 htab->elf.splt->contents
765e526c 5162 + htab->lazy_plt->plt0_got1_offset);
f604c2a2
L		 5163 bfd_put_32 (output_bfd,
5164 (htab->elf.sgotplt->output_section->vma
5165 + htab->elf.sgotplt->output_offset
5166 + 8),
5167 htab->elf.splt->contents
765e526c 5168 + htab->lazy_plt->plt0_got2_offset);
eac338cf 5169
9a742a90 5170 if (htab->is_vxworks)
1f78f649 5171 {
f604c2a2
L		 5172 Elf_Internal_Rela rel;
5173 int num_plts = (htab->elf.splt->size
765e526c 5174 / htab->plt.plt_entry_size) - 1;
f604c2a2 5175 unsigned char *p;
765e526c 5176 asection *srelplt2 = htab->srelplt2;
f604c2a2
L		 5177
5178 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5179 + 4. On IA32 we use REL relocations so the
5180 addend goes in the PLT directly. */
5181 rel.r_offset = (htab->elf.splt->output_section->vma
5182 + htab->elf.splt->output_offset
765e526c 5183 + htab->lazy_plt->plt0_got1_offset);
1f78f649
L		 5184 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5185 R_386_32);
f604c2a2 5186 bfd_elf32_swap_reloc_out (output_bfd, &rel,
0afcef53 5187 srelplt2->contents);
f604c2a2
L		 5188 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5189 + 8. */
5190 rel.r_offset = (htab->elf.splt->output_section->vma
5191 + htab->elf.splt->output_offset
765e526c 5192 + htab->lazy_plt->plt0_got2_offset);
f604c2a2 5193 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
1f78f649 5194 R_386_32);
f604c2a2 5195 bfd_elf32_swap_reloc_out (output_bfd, &rel,
0afcef53 5196 srelplt2->contents +
f604c2a2
L		 5197 sizeof (Elf32_External_Rel));
5198 /* Correct the .rel.plt.unloaded relocations. */
0afcef53 5199 p = srelplt2->contents;
f604c2a2
L		 5200 if (bfd_link_pic (info))
5201 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5202 else
5203 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5204
5205 for (; num_plts; num_plts--)
5206 {
5207 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5208 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5209 R_386_32);
5210 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5211 p += sizeof (Elf32_External_Rel);
5212
5213 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5214 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
5215 R_386_32);
5216 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5217 p += sizeof (Elf32_External_Rel);
5218 }
1f78f649 5219 }
eac338cf
PB		 5220 }
5221 }
252b5132 5222 }
f604c2a2
L		 5223
5224 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5225 elf_section_data (htab->plt_got->output_section)
765e526c 5226 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
ee2fdd6f
L		 5227
5228 if (htab->plt_second != NULL && htab->plt_second->size > 0)
5229 elf_section_data (htab->plt_second->output_section)
765e526c 5230 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
252b5132
RH		 5231 }
5232
f604c2a2
L		 5233 /* Fill in the first three entries in the global offset table. */
5234 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
252b5132 5235 {
56d4289c
L		 5236 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5237 {
4eca0228 5238 _bfd_error_handler
56d4289c
L		 5239 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5240 return FALSE;
5241 }
5242
f604c2a2
L		 5243 bfd_put_32 (output_bfd,
5244 (sdyn == NULL ? 0
5245 : sdyn->output_section->vma + sdyn->output_offset),
5246 htab->elf.sgotplt->contents);
5247 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5248 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
252b5132 5249
6de2ae4a 5250 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
12d0ee4a 5251 }
8c37241b 5252
e41b3a13 5253 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 5254 if (htab->plt_eh_frame != NULL
5255 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 5256 {
5257 if (htab->elf.splt != NULL
5258 && htab->elf.splt->size != 0
5259 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5260 && htab->elf.splt->output_section != NULL
5261 && htab->plt_eh_frame->output_section != NULL)
5262 {
5263 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5264 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5265 + htab->plt_eh_frame->output_offset
5266 + PLT_FDE_START_OFFSET;
5267 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5268 htab->plt_eh_frame->contents
5269 + PLT_FDE_START_OFFSET);
5270 }
5271 if (htab->plt_eh_frame->sec_info_type
dbaa2011 5272 == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 5273 {
5274 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5275 htab->plt_eh_frame,
5276 htab->plt_eh_frame->contents))
5277 return FALSE;
5278 }
5279 }
5280
fff53dae
L		 5281 /* Adjust .eh_frame for .plt.got section. */
5282 if (htab->plt_got_eh_frame != NULL
5283 && htab->plt_got_eh_frame->contents != NULL)
5284 {
5285 if (htab->plt_got != NULL
5286 && htab->plt_got->size != 0
5287 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5288 && htab->plt_got->output_section != NULL
5289 && htab->plt_got_eh_frame->output_section != NULL)
5290 {
5291 bfd_vma plt_start = htab->plt_got->output_section->vma;
5292 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5293 + htab->plt_got_eh_frame->output_offset
5294 + PLT_FDE_START_OFFSET;
5295 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5296 htab->plt_got_eh_frame->contents
5297 + PLT_FDE_START_OFFSET);
5298 }
5299 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5300 {
5301 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5302 htab->plt_got_eh_frame,
5303 htab->plt_got_eh_frame->contents))
5304 return FALSE;
5305 }
5306 }
5307
ee2fdd6f
L		 5308 /* Adjust .eh_frame for the second PLT section. */
5309 if (htab->plt_second_eh_frame != NULL
5310 && htab->plt_second_eh_frame->contents != NULL)
5311 {
5312 if (htab->plt_second != NULL
5313 && htab->plt_second->size != 0
5314 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
5315 && htab->plt_second->output_section != NULL
5316 && htab->plt_second_eh_frame->output_section != NULL)
5317 {
5318 bfd_vma plt_start = htab->plt_second->output_section->vma;
5319 bfd_vma eh_frame_start
5320 = (htab->plt_second_eh_frame->output_section->vma
5321 + htab->plt_second_eh_frame->output_offset
5322 + PLT_FDE_START_OFFSET);
5323 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5324 htab->plt_second_eh_frame->contents
5325 + PLT_FDE_START_OFFSET);
5326 }
5327 if (htab->plt_second_eh_frame->sec_info_type
5328 == SEC_INFO_TYPE_EH_FRAME)
5329 {
5330 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5331 htab->plt_second_eh_frame,
5332 htab->plt_second_eh_frame->contents))
5333 return FALSE;
5334 }
5335 }
5336
6de2ae4a
L		 5337 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5338 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
8c37241b 5339
aec6b87e
L		 5340 /* Fill PLT entries for undefined weak symbols in PIE. */
5341 if (bfd_link_pie (info))
5342 bfd_hash_traverse (&info->hash->table,
5343 elf_i386_pie_finish_undefweak_symbol,
5344 info);
5345
b34976b6 5346 return TRUE;
252b5132
RH		 5347}
5348
233cc9c1
L		 5349/* Fill PLT/GOT entries and allocate dynamic relocations for local
5350 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5351 It has to be done before elf_link_sort_relocs is called so that
5352 dynamic relocations are properly sorted. */
5353
5354static bfd_boolean
5355elf_i386_output_arch_local_syms
5356 (bfd *output_bfd ATTRIBUTE_UNUSED,
5357 struct bfd_link_info *info,
5358 void *flaginfo ATTRIBUTE_UNUSED,
5359 int (*func) (void *, const char *,
5360 Elf_Internal_Sym *,
5361 asection *,
5362 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5363{
0afcef53
L		 5364 struct elf_x86_link_hash_table *htab
5365 = elf_x86_hash_table (info, I386_ELF_DATA);
233cc9c1
L		 5366 if (htab == NULL)
5367 return FALSE;
5368
5369 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5370 htab_traverse (htab->loc_hash_table,
5371 elf_i386_finish_local_dynamic_symbol,
5372 info);
5373
5374 return TRUE;
5375}
5376
f604c2a2 5377/* Forward declaration. */
765e526c 5378static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
f604c2a2
L		 5379
5380/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5381 dynamic relocations. */
5382
5383static long
5384elf_i386_get_synthetic_symtab (bfd *abfd,
5385 long symcount ATTRIBUTE_UNUSED,
5386 asymbol **syms ATTRIBUTE_UNUSED,
5387 long dynsymcount,
5388 asymbol **dynsyms,
5389 asymbol **ret)
5390{
f493882d 5391 long count, i, n;
f604c2a2 5392 int j;
f604c2a2 5393 bfd_byte *plt_contents;
f493882d 5394 long relsize;
765e526c
L		 5395 const struct elf_x86_lazy_plt_layout *lazy_plt;
5396 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
5397 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
5398 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
f604c2a2
L		 5399 asection *plt;
5400 bfd_vma got_addr;
f493882d
L		 5401 enum elf_x86_plt_type plt_type;
5402 struct elf_x86_plt plts[] =
3972882e 5403 {
f493882d
L		 5404 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
5405 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
5406 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
5407 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
f604c2a2 5408 };
144bed8d 5409
f604c2a2 5410 *ret = NULL;
144bed8d 5411
f604c2a2
L		 5412 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5413 return 0;
3972882e 5414
f604c2a2
L		 5415 if (dynsymcount <= 0)
5416 return 0;
cca5b8b6 5417
f604c2a2
L		 5418 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
5419 if (relsize <= 0)
5420 return -1;
cca5b8b6 5421
f604c2a2
L		 5422 non_lazy_plt = NULL;
5423 /* Silence GCC 6. */
5424 lazy_plt = NULL;
ee2fdd6f
L		 5425 non_lazy_ibt_plt = NULL;
5426 lazy_ibt_plt = NULL;
f604c2a2 5427 switch (get_elf_i386_backend_data (abfd)->os)
144bed8d 5428 {
f604c2a2
L		 5429 case is_normal:
5430 non_lazy_plt = &elf_i386_non_lazy_plt;
ee2fdd6f
L		 5431 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5432 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 5433 /* Fall through */
5434 case is_vxworks:
5435 lazy_plt = &elf_i386_lazy_plt;
5436 break;
5437 case is_nacl:
5438 lazy_plt = &elf_i386_nacl_plt;
5439 break;
5440 }
5441
5442 got_addr = 0;
3972882e 5443
f604c2a2
L		 5444 count = 0;
5445 for (j = 0; plts[j].name != NULL; j++)
5446 {
5447 plt = bfd_get_section_by_name (abfd, plts[j].name);
90efb642 5448 if (plt == NULL || plt->size == 0)
6f25f223 5449 continue;
533d0af0 5450
f604c2a2
L		 5451 /* Get the PLT section contents. */
5452 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5453 if (plt_contents == NULL)
5454 break;
5455 if (!bfd_get_section_contents (abfd, (asection *) plt,
5456 plt_contents, 0, plt->size))
5457 {
5458 free (plt_contents);
5459 break;
5460 }
5461
5462 /* Check what kind of PLT it is. */
5463 plt_type = plt_unknown;
90efb642
L		 5464 if (plts[j].type == plt_unknown
5465 && (plt->size >= (lazy_plt->plt0_entry_size
5466 + lazy_plt->plt_entry_size)))
f604c2a2
L		 5467 {
5468 /* Match lazy PLT first. */
5469 if (memcmp (plt_contents, lazy_plt->plt0_entry,
5470 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 5471 {
5472 /* The fist entry in the lazy IBT PLT is the same as the
5473 normal lazy PLT. */
5474 if (lazy_ibt_plt != NULL
90efb642 5475 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 5476 lazy_ibt_plt->plt_entry,
5477 lazy_ibt_plt->plt_got_offset) == 0))
5478 plt_type = plt_lazy | plt_second;
5479 else
5480 plt_type = plt_lazy;
5481 }
f604c2a2
L		 5482 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
5483 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 5484 {
5485 /* The fist entry in the PIC lazy IBT PLT is the same as
5486 the normal PIC lazy PLT. */
5487 if (lazy_ibt_plt != NULL
90efb642 5488 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 5489 lazy_ibt_plt->pic_plt_entry,
5490 lazy_ibt_plt->plt_got_offset) == 0))
5491 plt_type = plt_lazy | plt_pic | plt_second;
5492 else
5493 plt_type = plt_lazy | plt_pic;
5494 }
f604c2a2
L		 5495 }
5496
5497 if (non_lazy_plt != NULL
90efb642
L		 5498 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5499 && plt->size >= non_lazy_plt->plt_entry_size)
f604c2a2
L		 5500 {
5501 /* Match non-lazy PLT. */
5502 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5503 non_lazy_plt->plt_got_offset) == 0)
5504 plt_type = plt_non_lazy;
5505 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
5506 non_lazy_plt->plt_got_offset) == 0)
5507 plt_type = plt_pic;
5508 }
5509
ee2fdd6f 5510 if ((non_lazy_ibt_plt != NULL)
90efb642
L		 5511 && (plt_type == plt_unknown || plt_type == plt_second)
5512 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
ee2fdd6f
L		 5513 {
5514 if (memcmp (plt_contents,
5515 non_lazy_ibt_plt->plt_entry,
5516 non_lazy_ibt_plt->plt_got_offset) == 0)
5517 {
5518 /* Match IBT PLT. */
5519 plt_type = plt_second;
5520 non_lazy_plt = non_lazy_ibt_plt;
5521 }
5522 else if (memcmp (plt_contents,
5523 non_lazy_ibt_plt->pic_plt_entry,
5524 non_lazy_ibt_plt->plt_got_offset) == 0)
5525 {
5526 /* Match PIC IBT PLT. */
5527 plt_type = plt_second | plt_pic;
5528 non_lazy_plt = non_lazy_ibt_plt;
5529 }
5530 }
5531
f604c2a2 5532 if (plt_type == plt_unknown)
37c0b6ee
L		 5533 {
5534 free (plt_contents);
5535 continue;
5536 }
3972882e 5537
f604c2a2
L		 5538 plts[j].sec = plt;
5539 plts[j].type = plt_type;
ec1f73bb 5540
f604c2a2
L		 5541 if ((plt_type & plt_lazy))
5542 {
5543 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5544 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5545 /* Skip PLT0 in lazy PLT. */
5546 i = 1;
5547 }
5548 else
5549 {
5550 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5551 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5552 i = 0;
5553 }
fca6ae69 5554
ee2fdd6f
L		 5555 /* Skip lazy PLT when the second PLT is used. */
5556 if ((plt_type & (plt_lazy | plt_second))
5557 == (plt_lazy | plt_second))
5558 plts[j].count = 0;
5559 else
5560 {
5561 n = plt->size / plts[j].plt_entry_size;
5562 plts[j].count = n;
5563 count += n - i;
5564 }
f604c2a2
L		 5565
5566 plts[j].contents = plt_contents;
5567
5568 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
5569 if ((plt_type & plt_pic))
5570 got_addr = (bfd_vma) -1;
144bed8d
L		 5571 }
5572
f493882d
L		 5573 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5574 got_addr, plts, dynsyms,
5575 ret);
4c45e5c9
JJ		 5576}
5577
f604c2a2
L		 5578/* Set up i386 GNU properties. Return the first relocatable ELF input
5579 with GNU properties if found. Otherwise, return NULL. */
5580
5581static bfd *
5582elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
5583{
a6798bab 5584 struct elf_x86_plt_layout_table plt_layout;
f604c2a2 5585
a6798bab
L		 5586 plt_layout.normal_target = FALSE;
5587 plt_layout.is_vxworks = FALSE;
f604c2a2
L		 5588 switch (get_elf_i386_backend_data (info->output_bfd)->os)
5589 {
5590 case is_normal:
a6798bab
L		 5591 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5592 plt_layout.non_lazy_plt = &elf_i386_non_lazy_plt;
5593 plt_layout.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5594 plt_layout.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5595 plt_layout.normal_target = TRUE;
f604c2a2
L		 5596 break;
5597 case is_vxworks:
a6798bab
L		 5598 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5599 plt_layout.non_lazy_plt = NULL;
5600 plt_layout.lazy_ibt_plt = NULL;
5601 plt_layout.non_lazy_ibt_plt = NULL;
5602 plt_layout.is_vxworks = TRUE;
f604c2a2
L		 5603 break;
5604 case is_nacl:
a6798bab
L		 5605 plt_layout.lazy_plt = &elf_i386_nacl_plt;
5606 plt_layout.non_lazy_plt = NULL;
5607 plt_layout.lazy_ibt_plt = NULL;
5608 plt_layout.non_lazy_ibt_plt = NULL;
f604c2a2
L		 5609 break;
5610 }
5611
a6798bab 5612 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
f604c2a2
L		 5613}
5614
6d00b590 5615#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 5616#define TARGET_LITTLE_NAME "elf32-i386"
5617#define ELF_ARCH bfd_arch_i386
ae95ffa6 5618#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 5619#define ELF_MACHINE_CODE EM_386
5620#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 5621
5622#define elf_backend_can_gc_sections 1
51b64d56 5623#define elf_backend_can_refcount 1
252b5132
RH		 5624#define elf_backend_want_got_plt 1
5625#define elf_backend_plt_readonly 1
5626#define elf_backend_want_plt_sym 0
5627#define elf_backend_got_header_size 12
e41b3a13 5628#define elf_backend_plt_alignment 4
64f52338 5629#define elf_backend_dtrel_excludes_plt 1
f7483970 5630#define elf_backend_extern_protected_data 1
bedfd056 5631#define elf_backend_caches_rawsize 1
5474d94f 5632#define elf_backend_want_dynrelro 1
252b5132 5633
8c29f035
AM		 5634/* Support RELA for objdump of prelink objects. */
5635#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 5636#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5637
dd5724d5 5638#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
dd5724d5 5639#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 5640#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 5641#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5 5642
13285a1b 5643#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 5644#define elf_backend_check_relocs elf_i386_check_relocs
f604c2a2 5645#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
0ac8d2ca 5646#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 5647#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5648#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
233cc9c1 5649#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
c5fccbec
DJ		 5650#define elf_backend_grok_prstatus elf_i386_grok_prstatus
5651#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 5652#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 5653#define elf_backend_relocate_section elf_i386_relocate_section
5654#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
f604c2a2 5655#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
dd5724d5 5656
252b5132 5657#include "elf32-target.h"
2bc3c89a
AM		 5658
5659/* FreeBSD support. */
5660
5661#undef TARGET_LITTLE_SYM
6d00b590 5662#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 5663#undef TARGET_LITTLE_NAME
5664#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 5665#undef ELF_OSABI
5666#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 5667
5668/* The kernel recognizes executables as valid only if they carry a
5669 "FreeBSD" label in the ELF header. So we put this label on all
5670 executables and (for simplicity) also all other object files. */
5671
2bc3c89a 5672static void
d8045f23 5673elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 5674{
78245035 5675 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 5676
2bc3c89a 5677#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 5678 {
5679 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5680 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5681 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5682 }
caf47ea6 5683#endif
2bc3c89a
AM		 5684}
5685
5686#undef elf_backend_post_process_headers
d8045f23 5687#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 5688#undef elf32_bed
5689#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 5690
d8045f23
NC		 5691#undef elf_backend_add_symbol_hook
5692
2bc3c89a 5693#include "elf32-target.h"
eac338cf 5694
a6cc6b3b
RO		 5695/* Solaris 2. */
5696
5697#undef TARGET_LITTLE_SYM
6d00b590 5698#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 5699#undef TARGET_LITTLE_NAME
5700#define TARGET_LITTLE_NAME "elf32-i386-sol2"
5701
914082d1
L		 5702#undef elf_backend_post_process_headers
5703
a6cc6b3b
RO		 5704/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5705 objects won't be recognized. */
5706#undef ELF_OSABI
5707
5708#undef elf32_bed
5709#define elf32_bed elf32_i386_sol2_bed
5710
7dc98aea
RO		 5711/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5712 boundary. */
84865015 5713#undef elf_backend_static_tls_alignment
7dc98aea
RO		 5714#define elf_backend_static_tls_alignment 8
5715
a6cc6b3b
RO		 5716/* The Solaris 2 ABI requires a plt symbol on all platforms.
5717
5718 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5719 File, p.63. */
84865015 5720#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 5721#define elf_backend_want_plt_sym 1
5722
84865015
NC		 5723#undef elf_backend_strtab_flags
5724#define elf_backend_strtab_flags SHF_STRINGS
5725
5522f910
NC		 5726/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
5727 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5728 FALSE otherwise. ISECTION is the best guess matching section from the
5729 input bfd IBFD, but it might be NULL. */
5730
84865015 5731static bfd_boolean
5522f910
NC		 5732elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5733 bfd *obfd ATTRIBUTE_UNUSED,
5734 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5735 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 5736{
5737 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 5738 and sh_link fields of Solaris specific section types. */
5739 return FALSE;
84865015 5740
5522f910 5741 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 5742 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
5743
5744http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
5745
5746 The following values should be set:
5747
5748Type Link Info
5749-----------------------------------------------------------------------------
5750SHT_SUNW_ancillary The section header index of 0
5751 [0x6fffffee] the associated string table.
5752
5753SHT_SUNW_capinfo The section header index of For a dynamic object, the
5754 [0x6ffffff0] the associated symbol table. section header index of
5755 the associated
5756 SHT_SUNW_capchain table,
5757 otherwise 0.
5758
5759SHT_SUNW_symsort The section header index of 0
5760 [0x6ffffff1] the associated symbol table.
5761
5762SHT_SUNW_tlssort The section header index of 0
5763 [0x6ffffff2] the associated symbol table.
5764
5765SHT_SUNW_LDYNSYM The section header index of One greater than the
5766 [0x6ffffff3] the associated string table. symbol table index of the
5767 This index is the same string last local symbol,
5768 table used by the SHT_DYNSYM STB_LOCAL. Since
5769 section. SHT_SUNW_LDYNSYM only
5770 contains local symbols,
5771 sh_info is equivalent to
5772 the number of symbols in
5773 the table.
5774
5775SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
5776 [0x6ffffff5] the section header index of to named strings, the
5777 the associated section header index of
5778 SHT_SUNW_capinfo table, the associated string
5779 otherwise 0. table, otherwise 0.
5780
5781SHT_SUNW_move The section header index of 0
5782 [0x6ffffffa] the associated symbol table.
5783
5784SHT_SUNW_COMDAT 0 0
5785 [0x6ffffffb]
5786
5787SHT_SUNW_syminfo The section header index of The section header index
5788 [0x6ffffffc] the associated symbol table. of the associated
5789 .dynamic section.
5790
5791SHT_SUNW_verdef The section header index of The number of version
5792 [0x6ffffffd] the associated string table. definitions within the
5793 section.
5794
5795SHT_SUNW_verneed The section header index of The number of version
5796 [0x6ffffffe] the associated string table. dependencies within the
5797 section.
5798
5799SHT_SUNW_versym The section header index of 0
5800 [0x6fffffff] the associated symbol table. */
84865015
NC		 5801}
5802
5522f910
NC		 5803#undef elf_backend_copy_special_section_fields
5804#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 5805
a6cc6b3b
RO		 5806#include "elf32-target.h"
5807
bf64a951
L		 5808/* Intel MCU support. */
5809
5810static bfd_boolean
5811elf32_iamcu_elf_object_p (bfd *abfd)
5812{
5813 /* Set the right machine number for an IAMCU elf32 file. */
5814 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5815 return TRUE;
5816}
5817
5818#undef TARGET_LITTLE_SYM
5819#define TARGET_LITTLE_SYM iamcu_elf32_vec
5820#undef TARGET_LITTLE_NAME
5821#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 5822#undef ELF_ARCH
bf64a951
L		 5823#define ELF_ARCH bfd_arch_iamcu
5824
5825#undef ELF_MACHINE_CODE
5826#define ELF_MACHINE_CODE EM_IAMCU
5827
5828#undef ELF_OSABI
5829
5830#undef elf32_bed
5831#define elf32_bed elf32_iamcu_bed
5832
5833#undef elf_backend_object_p
5834#define elf_backend_object_p elf32_iamcu_elf_object_p
5835
5836#undef elf_backend_static_tls_alignment
5837
5838#undef elf_backend_want_plt_sym
5839#define elf_backend_want_plt_sym 0
5840
84865015 5841#undef elf_backend_strtab_flags
5522f910 5842#undef elf_backend_copy_special_section_fields
84865015 5843
bf64a951
L		 5844#include "elf32-target.h"
5845
5846/* Restore defaults. */
5847#undef ELF_ARCH
5848#define ELF_ARCH bfd_arch_i386
5849#undef ELF_MACHINE_CODE
5850#define ELF_MACHINE_CODE EM_386
5851
a27e4371
RM		 5852/* Native Client support. */
5853
5854#undef TARGET_LITTLE_SYM
6d00b590 5855#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 5856#undef TARGET_LITTLE_NAME
5857#define TARGET_LITTLE_NAME "elf32-i386-nacl"
5858#undef elf32_bed
5859#define elf32_bed elf32_i386_nacl_bed
5860
5861#undef ELF_MAXPAGESIZE
5862#define ELF_MAXPAGESIZE 0x10000
5863
5864/* Restore defaults. */
5865#undef ELF_OSABI
5866#undef elf_backend_want_plt_sym
5867#define elf_backend_want_plt_sym 0
5868#undef elf_backend_post_process_headers
a27e4371
RM		 5869#undef elf_backend_static_tls_alignment
5870
5871/* NaCl uses substantially different PLT entries for the same effects. */
5872
5873#undef elf_backend_plt_alignment
5874#define elf_backend_plt_alignment 5
5875#define NACL_PLT_ENTRY_SIZE 64
5876#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5877
5878static const bfd_byte elf_i386_nacl_plt0_entry[] =
5879 {
5880 0xff, 0x35, /* pushl contents of address */
5881 0, 0, 0, 0, /* replaced with address of .got + 4. */
5882 0x8b, 0x0d, /* movl contents of address, %ecx */
5883 0, 0, 0, 0, /* replaced with address of .got + 8. */
5884 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5885 0xff, 0xe1 /* jmp *%ecx */
5886 };
5887
5888static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5889 {
5890 0x8b, 0x0d, /* movl contents of address, %ecx */
5891 0, 0, 0, 0, /* replaced with GOT slot address. */
5892 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5893 0xff, 0xe1, /* jmp *%ecx */
5894
5895 /* Pad to the next 32-byte boundary with nop instructions. */
5896 0x90,
5897 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5898 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5899
5900 /* Lazy GOT entries point here (32-byte aligned). */
5901 0x68, /* pushl immediate */
5902 0, 0, 0, 0, /* replaced with reloc offset. */
5903 0xe9, /* jmp relative */
5904 0, 0, 0, 0, /* replaced with offset to .plt. */
5905
5906 /* Pad to the next 32-byte boundary with nop instructions. */
5907 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5908 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5909 0x90, 0x90
5910 };
5911
5912static const bfd_byte
5913elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5914 {
5915 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5916 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5917 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5918 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 5919
5920 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5921 so pad to that size with nop instructions. */
5922 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 5923 };
5924
5925static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5926 {
5927 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5928 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5929 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5930 0xff, 0xe1, /* jmp *%ecx */
5931
5932 /* Pad to the next 32-byte boundary with nop instructions. */
5933 0x90,
5934 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5935 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5936
5937 /* Lazy GOT entries point here (32-byte aligned). */
5938 0x68, /* pushl immediate */
5939 0, 0, 0, 0, /* replaced with offset into relocation table. */
5940 0xe9, /* jmp relative */
5941 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5942
5943 /* Pad to the next 32-byte boundary with nop instructions. */
5944 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5945 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5946 0x90, 0x90
5947 };
5948
5949static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5950 {
5951#if (PLT_CIE_LENGTH != 20 \
5952 || PLT_FDE_LENGTH != 36 \
5953 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5954 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5955# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5956#endif
5957 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5958 0, 0, 0, 0, /* CIE ID */
5959 1, /* CIE version */
5960 'z', 'R', 0, /* Augmentation string */
5961 1, /* Code alignment factor */
5962 0x7c, /* Data alignment factor: -4 */
5963 8, /* Return address column */
5964 1, /* Augmentation size */
5965 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5966 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5967 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5968 DW_CFA_nop, DW_CFA_nop,
5969
5970 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5971 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5972 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5973 0, 0, 0, 0, /* .plt size goes here */
5974 0, /* Augmentation size */
5975 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5976 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5977 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5978 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5979 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5980 13, /* Block length */
5981 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5982 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5983 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5984 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5985 DW_CFA_nop, DW_CFA_nop
5986 };
5987
765e526c 5988static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
a27e4371
RM		 5989 {
5990 elf_i386_nacl_plt0_entry, /* plt0_entry */
5991 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
a27e4371
RM		 5992 elf_i386_nacl_plt_entry, /* plt_entry */
5993 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 5994 2, /* plt0_got1_offset */
5995 8, /* plt0_got2_offset */
5996 0, /* plt0_got2_insn_end */
a27e4371
RM		 5997 2, /* plt_got_offset */
5998 33, /* plt_reloc_offset */
5999 38, /* plt_plt_offset */
765e526c
L		 6000 0, /* plt_got_insn_size */
6001 0, /* plt_plt_insn_end */
a27e4371
RM		 6002 32, /* plt_lazy_offset */
6003 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6004 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6005 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
f604c2a2 6006 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
a27e4371
RM		 6007 };
6008
6009static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6010 {
f604c2a2
L		 6011 0x90, /* plt0_pad_byte: nop insn */
6012 is_nacl /* os */
a27e4371
RM		 6013 };
6014
64b384e1
RM		 6015static bfd_boolean
6016elf32_i386_nacl_elf_object_p (bfd *abfd)
6017{
6018 /* Set the right machine number for a NaCl i386 ELF32 file. */
6019 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6020 return TRUE;
6021}
6022
a27e4371
RM		 6023#undef elf_backend_arch_data
6024#define elf_backend_arch_data &elf_i386_nacl_arch_bed
6025
64b384e1
RM		 6026#undef elf_backend_object_p
6027#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 6028#undef elf_backend_modify_segment_map
6029#define elf_backend_modify_segment_map nacl_modify_segment_map
6030#undef elf_backend_modify_program_headers
6031#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 6032#undef elf_backend_final_write_processing
6033#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 6034
a27e4371
RM		 6035#include "elf32-target.h"
6036
5a68afcf 6037/* Restore defaults. */
64b384e1 6038#undef elf_backend_object_p
5a68afcf
RM		 6039#undef elf_backend_modify_segment_map
6040#undef elf_backend_modify_program_headers
887badb3 6041#undef elf_backend_final_write_processing
5a68afcf 6042
eac338cf
PB		 6043/* VxWorks support. */
6044
6045#undef TARGET_LITTLE_SYM
6d00b590 6046#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 6047#undef TARGET_LITTLE_NAME
6048#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 6049#undef ELF_OSABI
1587442d
L		 6050#undef ELF_MAXPAGESIZE
6051#define ELF_MAXPAGESIZE 0x1000
a27e4371
RM		 6052#undef elf_backend_plt_alignment
6053#define elf_backend_plt_alignment 4
eac338cf 6054
23209a78
RM		 6055static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6056 {
6057 0x90, /* plt0_pad_byte */
f604c2a2 6058 is_vxworks /* os */
23209a78 6059 };
eac338cf 6060
23209a78
RM		 6061#undef elf_backend_arch_data
6062#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 6063
13285a1b 6064#undef elf_backend_relocs_compatible
eac338cf
PB		 6065#undef elf_backend_add_symbol_hook
6066#define elf_backend_add_symbol_hook \
6067 elf_vxworks_add_symbol_hook
6068#undef elf_backend_link_output_symbol_hook
6069#define elf_backend_link_output_symbol_hook \
9c72ff84 6070 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 6071#undef elf_backend_emit_relocs
6072#define elf_backend_emit_relocs elf_vxworks_emit_relocs
6073#undef elf_backend_final_write_processing
6074#define elf_backend_final_write_processing \
6075 elf_vxworks_final_write_processing
7dc98aea 6076#undef elf_backend_static_tls_alignment
eac338cf
PB		 6077
6078/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6079 define it. */
6080#undef elf_backend_want_plt_sym
6081#define elf_backend_want_plt_sym 1
6082
6083#undef elf32_bed
6084#define elf32_bed elf32_i386_vxworks_bed
6085
6086#include "elf32-target.h"
GDB Binutils - Deliverables
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