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Use gdb::byte_vector in pascal_object_print_value
[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 658{
e41b3a13
JJ		 659 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
660 0, 0, 0, 0, /* CIE ID */
661 1, /* CIE version */
662 'z', 'R', 0, /* Augmentation string */
663 1, /* Code alignment factor */
664 0x7c, /* Data alignment factor */
665 8, /* Return address column */
666 1, /* Augmentation size */
667 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
668 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
669 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
670 DW_CFA_nop, DW_CFA_nop,
671
672 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
673 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
674 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
675 0, 0, 0, 0, /* .plt size goes here */
676 0, /* Augmentation size */
677 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
678 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
679 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
680 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
681 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
682 11, /* Block length */
683 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
684 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
685 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 686 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ		 687 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
688};
689
ee2fdd6f
L		 690/* .eh_frame covering the lazy .plt section with IBT-enabled. */
691
692static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
693{
694 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
695 0, 0, 0, 0, /* CIE ID */
696 1, /* CIE version */
697 'z', 'R', 0, /* Augmentation string */
698 1, /* Code alignment factor */
699 0x7c, /* Data alignment factor */
700 8, /* Return address column */
701 1, /* Augmentation size */
702 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
703 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
704 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
705 DW_CFA_nop, DW_CFA_nop,
706
707 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
708 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
709 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
710 0, 0, 0, 0, /* .plt size goes here */
711 0, /* Augmentation size */
712 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
713 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
714 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
715 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
716 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
717 11, /* Block length */
718 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
719 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
720 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
721 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
722 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
723};
724
f604c2a2 725/* .eh_frame covering the non-lazy .plt section. */
fff53dae 726
f604c2a2 727static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
fff53dae
L		 728{
729#define PLT_GOT_FDE_LENGTH 16
730 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
731 0, 0, 0, 0, /* CIE ID */
732 1, /* CIE version */
733 'z', 'R', 0, /* Augmentation string */
734 1, /* Code alignment factor */
735 0x7c, /* Data alignment factor */
736 8, /* Return address column */
737 1, /* Augmentation size */
738 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
739 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
740 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
741 DW_CFA_nop, DW_CFA_nop,
742
743 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
744 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
f604c2a2
L		 745 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
746 0, 0, 0, 0, /* non-lazy .plt size goes here */
fff53dae
L		 747 0, /* Augmentation size */
748 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
749};
750
25e762b9 751/* These are the standard parameters. */
765e526c 752static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
25e762b9 753 {
f604c2a2
L		 754 elf_i386_lazy_plt0_entry, /* plt0_entry */
755 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
f604c2a2
L		 756 elf_i386_lazy_plt_entry, /* plt_entry */
757 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 758 2, /* plt0_got1_offset */
759 8, /* plt0_got2_offset */
760 0, /* plt0_got2_insn_end */
25e762b9
RM		 761 2, /* plt_got_offset */
762 7, /* plt_reloc_offset */
763 12, /* plt_plt_offset */
765e526c
L		 764 0, /* plt_got_insn_size */
765 0, /* plt_plt_insn_end */
25e762b9 766 6, /* plt_lazy_offset */
f604c2a2
L		 767 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
768 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
769 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
770 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
771 };
772
765e526c 773static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
f604c2a2
L		 774 {
775 elf_i386_non_lazy_plt_entry, /* plt_entry */
776 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
777 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
778 2, /* plt_got_offset */
765e526c 779 0, /* plt_got_insn_size */
f604c2a2
L		 780 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
781 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
25e762b9 782 };
ee2fdd6f 783
765e526c 784static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
ee2fdd6f
L		 785 {
786 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
787 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
ee2fdd6f
L		 788 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
789 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 790 2, /* plt0_got1_offset */
791 8, /* plt0_got2_offset */
792 0, /* plt0_got2_insn_end */
ee2fdd6f
L		 793 4+2, /* plt_got_offset */
794 4+1, /* plt_reloc_offset */
795 4+6, /* plt_plt_offset */
765e526c
L		 796 0, /* plt_got_insn_size */
797 0, /* plt_plt_insn_end */
ee2fdd6f
L		 798 0, /* plt_lazy_offset */
799 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
800 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
801 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
802 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
803 };
804
765e526c 805static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
ee2fdd6f
L		 806 {
807 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
808 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
809 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
810 4+2, /* plt_got_offset */
765e526c 811 0, /* plt_got_insn_size */
ee2fdd6f
L		 812 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
813 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
814 };
25e762b9
RM		 815\f
816
eac338cf
PB		 817/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
818 for the PLTResolve stub and then for each PLT entry. */
819#define PLTRESOLVE_RELOCS_SHLIB 0
820#define PLTRESOLVE_RELOCS 2
821#define PLT_NON_JUMP_SLOT_RELOCS 2
822
23209a78
RM		 823/* Architecture-specific backend data for i386. */
824
825struct elf_i386_backend_data
826{
827 /* Value used to fill the unused bytes of the first PLT entry. */
828 bfd_byte plt0_pad_byte;
829
f604c2a2
L		 830 /* Target system. */
831 enum
832 {
833 is_normal,
834 is_vxworks,
835 is_nacl
836 } os;
23209a78
RM		 837};
838
839#define get_elf_i386_backend_data(abfd) \
840 ((const struct elf_i386_backend_data *) \
841 get_elf_backend_data (abfd)->arch_data)
842
843/* These are the standard parameters. */
844static const struct elf_i386_backend_data elf_i386_arch_bed =
845 {
846 0, /* plt0_pad_byte */
f604c2a2 847 is_normal /* os */
23209a78
RM		 848 };
849
850#define elf_backend_arch_data &elf_i386_arch_bed
851
142411ca
L		 852/* Return TRUE if the TLS access code sequence support transition
853 from R_TYPE. */
854
855static bfd_boolean
bedfd056 856elf_i386_check_tls_transition (asection *sec,
142411ca
L		 857 bfd_byte *contents,
858 Elf_Internal_Shdr *symtab_hdr,
859 struct elf_link_hash_entry **sym_hashes,
860 unsigned int r_type,
861 const Elf_Internal_Rela *rel,
862 const Elf_Internal_Rela *relend)
13ae64f3 863{
6eaa7fb5 864 unsigned int val, type, reg;
142411ca
L		 865 unsigned long r_symndx;
866 struct elf_link_hash_entry *h;
867 bfd_vma offset;
6eaa7fb5 868 bfd_byte *call;
1d4af308 869 bfd_boolean indirect_call;
142411ca 870
142411ca 871 offset = rel->r_offset;
13ae64f3 872 switch (r_type)
142411ca
L		 873 {
874 case R_386_TLS_GD:
875 case R_386_TLS_LDM:
876 if (offset < 2 || (rel + 1) >= relend)
877 return FALSE;
878
6eaa7fb5
L		 879 indirect_call = FALSE;
880 call = contents + offset + 4;
881 val = *(call - 5);
882 type = *(call - 6);
142411ca
L		 883 if (r_type == R_386_TLS_GD)
884 {
09e8c3bf 885 /* Check transition from GD access model. Only
6eaa7fb5
L		 886 leal foo@tlsgd(,%ebx,1), %eax
887 call ___tls_get_addr@PLT
888 or
889 leal foo@tlsgd(%ebx) %eax
890 call ___tls_get_addr@PLT
891 nop
892 or
893 leal foo@tlsgd(%reg), %eax
894 call *___tls_get_addr@GOT(%reg)
895 which may be converted to
896 addr32 call ___tls_get_addr
142411ca 897 can transit to different access model. */
6eaa7fb5
L		 898 if ((offset + 10) > sec->size
899 || (type != 0x8d && type != 0x04))
142411ca
L		 900 return FALSE;
901
142411ca
L		 902 if (type == 0x04)
903 {
6eaa7fb5
L		 904 /* leal foo@tlsgd(,%ebx,1), %eax
905 call ___tls_get_addr@PLT */
142411ca
L		 906 if (offset < 3)
907 return FALSE;
908
6eaa7fb5
L		 909 if (*(call - 7) != 0x8d
910 || val != 0x1d
911 || call[0] != 0xe8)
142411ca
L		 912 return FALSE;
913 }
914 else
915 {
6eaa7fb5
L		 916 /* This must be
917 leal foo@tlsgd(%ebx), %eax
918 call ___tls_get_addr@PLT
919 nop
920 or
921 leal foo@tlsgd(%reg), %eax
922 call *___tls_get_addr@GOT(%reg)
923 which may be converted to
924 addr32 call ___tls_get_addr
925
926 %eax can't be used as the GOT base register since it
927 is used to pass parameter to ___tls_get_addr. */
928 reg = val & 7;
929 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca
L		 930 return FALSE;
931
6eaa7fb5
L		 932 indirect_call = call[0] == 0xff;
933 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
934 && !(call[0] == 0x67 && call[1] == 0xe8)
935 && !(indirect_call
936 && (call[1] & 0xf8) == 0x90
937 && (call[1] & 0x7) == reg))
142411ca
L		 938 return FALSE;
939 }
940 }
941 else
942 {
943 /* Check transition from LD access model. Only
6eaa7fb5
L		 944 leal foo@tlsldm(%ebx), %eax
945 call ___tls_get_addr@PLT
946 or
947 leal foo@tlsldm(%reg), %eax
948 call *___tls_get_addr@GOT(%reg)
949 which may be converted to
950 addr32 call ___tls_get_addr
142411ca
L		 951 can transit to different access model. */
952 if (type != 0x8d || (offset + 9) > sec->size)
953 return FALSE;
954
6eaa7fb5
L		 955 /* %eax can't be used as the GOT base register since it is
956 used to pass parameter to ___tls_get_addr. */
957 reg = val & 7;
958 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca 959 return FALSE;
142411ca 960
6eaa7fb5
L		 961 indirect_call = call[0] == 0xff;
962 if (!(reg == 3 && call[0] == 0xe8)
963 && !(call[0] == 0x67 && call[1] == 0xe8)
964 && !(indirect_call
965 && (call[1] & 0xf8) == 0x90
966 && (call[1] & 0x7) == reg))
967 return FALSE;
968 }
142411ca
L		 969
970 r_symndx = ELF32_R_SYM (rel[1].r_info);
971 if (r_symndx < symtab_hdr->sh_info)
972 return FALSE;
973
974 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1d4af308 975 if (h == NULL
0afcef53 976 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
6eaa7fb5
L		 977 return FALSE;
978 else if (indirect_call)
979 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
980 else
981 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
982 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
142411ca
L		 983
984 case R_386_TLS_IE:
985 /* Check transition from IE access model:
986 movl foo@indntpoff(%rip), %eax
987 movl foo@indntpoff(%rip), %reg
988 addl foo@indntpoff(%rip), %reg
989 */
990
991 if (offset < 1 || (offset + 4) > sec->size)
992 return FALSE;
993
994 /* Check "movl foo@tpoff(%rip), %eax" first. */
995 val = bfd_get_8 (abfd, contents + offset - 1);
996 if (val == 0xa1)
997 return TRUE;
998
999 if (offset < 2)
1000 return FALSE;
1001
1002 /* Check movl|addl foo@tpoff(%rip), %reg. */
1003 type = bfd_get_8 (abfd, contents + offset - 2);
1004 return ((type == 0x8b || type == 0x03)
1005 && (val & 0xc7) == 0x05);
1006
1007 case R_386_TLS_GOTIE:
1008 case R_386_TLS_IE_32:
1009 /* Check transition from {IE_32,GOTIE} access model:
1010 subl foo@{tpoff,gontoff}(%reg1), %reg2
1011 movl foo@{tpoff,gontoff}(%reg1), %reg2
1012 addl foo@{tpoff,gontoff}(%reg1), %reg2
1013 */
1014
1015 if (offset < 2 || (offset + 4) > sec->size)
1016 return FALSE;
1017
1018 val = bfd_get_8 (abfd, contents + offset - 1);
1019 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1020 return FALSE;
1021
1022 type = bfd_get_8 (abfd, contents + offset - 2);
1023 return type == 0x8b || type == 0x2b || type == 0x03;
1024
1025 case R_386_TLS_GOTDESC:
1026 /* Check transition from GDesc access model:
1027 leal x@tlsdesc(%ebx), %eax
1028
1029 Make sure it's a leal adding ebx to a 32-bit offset
1030 into any register, although it's probably almost always
1031 going to be eax. */
1032
1033 if (offset < 2 || (offset + 4) > sec->size)
1034 return FALSE;
1035
1036 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1037 return FALSE;
1038
1039 val = bfd_get_8 (abfd, contents + offset - 1);
1040 return (val & 0xc7) == 0x83;
1041
1042 case R_386_TLS_DESC_CALL:
1043 /* Check transition from GDesc access model:
6eaa7fb5 1044 call *x@tlsdesc(%eax)
142411ca
L		 1045 */
1046 if (offset + 2 <= sec->size)
1047 {
6eaa7fb5
L		 1048 /* Make sure that it's a call *x@tlsdesc(%eax). */
1049 call = contents + offset;
1050 return call[0] == 0xff && call[1] == 0x10;
142411ca
L		 1051 }
1052
1053 return FALSE;
1054
1055 default:
1056 abort ();
1057 }
1058}
1059
1060/* Return TRUE if the TLS access transition is OK or no transition
1061 will be performed. Update R_TYPE if there is a transition. */
1062
1063static bfd_boolean
1064elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1065 asection *sec, bfd_byte *contents,
1066 Elf_Internal_Shdr *symtab_hdr,
1067 struct elf_link_hash_entry **sym_hashes,
1068 unsigned int *r_type, int tls_type,
1069 const Elf_Internal_Rela *rel,
1070 const Elf_Internal_Rela *relend,
4c544807 1071 struct elf_link_hash_entry *h,
bedfd056
L		 1072 unsigned long r_symndx,
1073 bfd_boolean from_relocate_section)
142411ca
L		 1074{
1075 unsigned int from_type = *r_type;
1076 unsigned int to_type = from_type;
1077 bfd_boolean check = TRUE;
1078
bb1cb422
L		 1079 /* Skip TLS transition for functions. */
1080 if (h != NULL
1081 && (h->type == STT_FUNC
1082 || h->type == STT_GNU_IFUNC))
1083 return TRUE;
1084
142411ca 1085 switch (from_type)
13ae64f3
JJ		 1086 {
1087 case R_386_TLS_GD:
67a4f2b7
AO		 1088 case R_386_TLS_GOTDESC:
1089 case R_386_TLS_DESC_CALL:
13ae64f3 1090 case R_386_TLS_IE_32:
37e55690
JJ		 1091 case R_386_TLS_IE:
1092 case R_386_TLS_GOTIE:
0e1862bb 1093 if (bfd_link_executable (info))
142411ca
L		 1094 {
1095 if (h == NULL)
1096 to_type = R_386_TLS_LE_32;
1097 else if (from_type != R_386_TLS_IE
1098 && from_type != R_386_TLS_GOTIE)
1099 to_type = R_386_TLS_IE_32;
1100 }
1101
bedfd056
L		 1102 /* When we are called from elf_i386_relocate_section, there may
1103 be additional transitions based on TLS_TYPE. */
1104 if (from_relocate_section)
142411ca
L		 1105 {
1106 unsigned int new_to_type = to_type;
1107
0e1862bb 1108 if (bfd_link_executable (info)
142411ca
L		 1109 && h != NULL
1110 && h->dynindx == -1
1111 && (tls_type & GOT_TLS_IE))
1112 new_to_type = R_386_TLS_LE_32;
1113
1114 if (to_type == R_386_TLS_GD
1115 || to_type == R_386_TLS_GOTDESC
1116 || to_type == R_386_TLS_DESC_CALL)
1117 {
1118 if (tls_type == GOT_TLS_IE_POS)
1119 new_to_type = R_386_TLS_GOTIE;
1120 else if (tls_type & GOT_TLS_IE)
1121 new_to_type = R_386_TLS_IE_32;
1122 }
1123
1124 /* We checked the transition before when we were called from
1125 elf_i386_check_relocs. We only want to check the new
1126 transition which hasn't been checked before. */
1127 check = new_to_type != to_type && from_type == to_type;
1128 to_type = new_to_type;
1129 }
1130
1131 break;
1132
13ae64f3 1133 case R_386_TLS_LDM:
0e1862bb 1134 if (bfd_link_executable (info))
142411ca
L		 1135 to_type = R_386_TLS_LE_32;
1136 break;
1137
1138 default:
1139 return TRUE;
1140 }
1141
1142 /* Return TRUE if there is no transition. */
1143 if (from_type == to_type)
1144 return TRUE;
1145
1146 /* Check if the transition can be performed. */
1147 if (check
bedfd056 1148 && ! elf_i386_check_tls_transition (sec, contents,
142411ca
L		 1149 symtab_hdr, sym_hashes,
1150 from_type, rel, relend))
1151 {
2f629d23 1152 reloc_howto_type *from, *to;
4c544807 1153 const char *name;
142411ca
L		 1154
1155 from = elf_i386_rtype_to_howto (abfd, from_type);
1156 to = elf_i386_rtype_to_howto (abfd, to_type);
1157
4c544807
L		 1158 if (h)
1159 name = h->root.root.string;
1160 else
1161 {
0afcef53 1162 struct elf_x86_link_hash_table *htab;
4dfe6ac6 1163
0afcef53 1164 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 1165 if (htab == NULL)
1166 name = "*unknown*";
1167 else
1168 {
1169 Elf_Internal_Sym *isym;
1170
1171 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1172 abfd, r_symndx);
1173 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1174 }
4c544807
L		 1175 }
1176
4eca0228 1177 _bfd_error_handler
695344c0 1178 /* xgettext:c-format */
d42c267e 1179 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
142411ca 1180 "in section `%A' failed"),
c08bb8dd 1181 abfd, from->name, to->name, name,
d42c267e 1182 rel->r_offset, sec);
142411ca
L		 1183 bfd_set_error (bfd_error_bad_value);
1184 return FALSE;
13ae64f3
JJ		 1185 }
1186
142411ca
L		 1187 *r_type = to_type;
1188 return TRUE;
13ae64f3
JJ		 1189}
1190
c175a657
L		 1191/* With the local symbol, foo, we convert
1192 mov foo@GOT[(%reg1)], %reg2
1193 to
1194 lea foo[@GOTOFF(%reg1)], %reg2
1195 and convert
1196 call/jmp *foo@GOT[(%reg)]
1197 to
1198 nop call foo/jmp foo nop
1199 When PIC is false, convert
1200 test %reg1, foo@GOT[(%reg2)]
1201 to
1202 test $foo, %reg1
1203 and convert
1204 binop foo@GOT[(%reg1)], %reg2
1205 to
1206 binop $foo, %reg2
1207 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1208 instructions. */
1209
1210static
1211bfd_boolean
1212elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1213 bfd_byte *contents,
6999821f 1214 unsigned int *r_type_p,
c175a657
L		 1215 Elf_Internal_Rela *irel,
1216 struct elf_link_hash_entry *h,
c175a657
L		 1217 struct bfd_link_info *link_info)
1218{
0afcef53 1219 struct elf_x86_link_hash_table *htab;
c175a657
L		 1220 unsigned int opcode;
1221 unsigned int modrm;
1222 bfd_boolean baseless;
1223 Elf_Internal_Sym *isym;
1224 unsigned int addend;
1225 unsigned int nop;
1226 bfd_vma nop_offset;
1227 bfd_boolean is_pic;
1228 bfd_boolean to_reloc_32;
1229 unsigned int r_type;
1230 unsigned int r_symndx;
1231 bfd_vma roff = irel->r_offset;
0a27fed7
L		 1232 bfd_boolean local_ref;
1233 struct elf_x86_link_hash_entry *eh;
c175a657
L		 1234
1235 if (roff < 2)
1236 return TRUE;
1237
7d4d9709 1238 /* Addend for R_386_GOT32X relocations must be 0. */
c175a657
L		 1239 addend = bfd_get_32 (abfd, contents + roff);
1240 if (addend != 0)
1241 return TRUE;
1242
0afcef53 1243 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
c175a657
L		 1244 is_pic = bfd_link_pic (link_info);
1245
6999821f 1246 r_type = *r_type_p;
c175a657
L		 1247 r_symndx = ELF32_R_SYM (irel->r_info);
1248
1249 modrm = bfd_get_8 (abfd, contents + roff - 1);
1250 baseless = (modrm & 0xc7) == 0x5;
1251
7d4d9709 1252 if (baseless && is_pic)
c175a657
L		 1253 {
1254 /* For PIC, disallow R_386_GOT32X without a base register
7d4d9709 1255 since we don't know what the GOT base is. */
c175a657
L		 1256 const char *name;
1257
1258 if (h == NULL)
1259 {
1260 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1261 r_symndx);
1262 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1263 }
1264 else
1265 name = h->root.root.string;
1266
4eca0228 1267 _bfd_error_handler
695344c0 1268 /* xgettext:c-format */
63a5468a
AM		 1269 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1270 " register can not be used when making a shared object"),
c175a657
L		 1271 abfd, name);
1272 return FALSE;
1273 }
1274
1275 opcode = bfd_get_8 (abfd, contents + roff - 2);
1276
c175a657
L		 1277 /* Convert to R_386_32 if PIC is false or there is no base
1278 register. */
1279 to_reloc_32 = !is_pic || baseless;
1280
0a27fed7
L		 1281 eh = elf_x86_hash_entry (h);
1282
7d4d9709
L		 1283 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1284 reloc. */
c175a657
L		 1285 if (h == NULL)
1286 {
1287 if (opcode == 0x0ff)
1288 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1289 goto convert_branch;
1290 else
1291 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1292 "test %reg1, foo@GOT(%reg2)" and
1293 "binop foo@GOT[(%reg1)], %reg2". */
1294 goto convert_load;
1295 }
1296
0a27fed7
L		 1297 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1298 local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
1299
c175a657
L		 1300 /* Undefined weak symbol is only bound locally in executable
1301 and its reference is resolved as 0. */
0a27fed7
L		 1302 if (h->root.type == bfd_link_hash_undefweak
1303 && !eh->linker_def
1304 && local_ref)
c175a657
L		 1305 {
1306 if (opcode == 0xff)
1307 {
1308 /* No direct branch to 0 for PIC. */
1309 if (is_pic)
1310 return TRUE;
1311 else
1312 goto convert_branch;
1313 }
1314 else
1315 {
1316 /* We can convert load of address 0 to R_386_32. */
1317 to_reloc_32 = TRUE;
1318 goto convert_load;
1319 }
1320 }
1321
1322 if (opcode == 0xff)
1323 {
1324 /* We have "call/jmp *foo@GOT[(%reg)]". */
1325 if ((h->root.type == bfd_link_hash_defined
1326 || h->root.type == bfd_link_hash_defweak)
0a27fed7 1327 && local_ref)
c175a657
L		 1328 {
1329 /* The function is locally defined. */
1330convert_branch:
1331 /* Convert R_386_GOT32X to R_386_PC32. */
1332 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1333 {
1334 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1335 is a nop prefix. */
1336 modrm = 0xe8;
6eaa7fb5
L		 1337 /* To support TLS optimization, always use addr32 prefix
1338 for "call *___tls_get_addr@GOT(%reg)". */
1d4af308 1339 if (eh && eh->tls_get_addr)
c175a657 1340 {
6eaa7fb5
L		 1341 nop = 0x67;
1342 nop_offset = irel->r_offset - 2;
c175a657
L		 1343 }
1344 else
6eaa7fb5
L		 1345 {
1346 nop = link_info->call_nop_byte;
1347 if (link_info->call_nop_as_suffix)
1348 {
1349 nop_offset = roff + 3;
1350 irel->r_offset -= 1;
1351 }
1352 else
1353 nop_offset = roff - 2;
1354 }
c175a657
L		 1355 }
1356 else
1357 {
1358 /* Convert to "jmp foo nop". */
1359 modrm = 0xe9;
1360 nop = NOP_OPCODE;
1361 nop_offset = roff + 3;
1362 irel->r_offset -= 1;
1363 }
1364
1365 bfd_put_8 (abfd, nop, contents + nop_offset);
1366 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1367 /* When converting to PC-relative relocation, we
1368 need to adjust addend by -4. */
1369 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1370 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
6999821f 1371 *r_type_p = R_386_PC32;
c175a657
L		 1372 }
1373 }
1374 else
1375 {
1376 /* We have "mov foo@GOT[(%re1g)], %reg2",
1377 "test %reg1, foo@GOT(%reg2)" and
1378 "binop foo@GOT[(%reg1)], %reg2".
1379
1380 Avoid optimizing _DYNAMIC since ld.so may use its
1381 link-time address. */
1382 if (h == htab->elf.hdynamic)
1383 return TRUE;
1384
1385 /* def_regular is set by an assignment in a linker script in
cbd0eecf
L		 1386 bfd_elf_record_link_assignment. start_stop is set on
1387 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1388 if (h->start_stop
0a27fed7 1389 || eh->linker_def
cbd0eecf
L		 1390 || ((h->def_regular
1391 || h->root.type == bfd_link_hash_defined
1392 || h->root.type == bfd_link_hash_defweak)
0a27fed7 1393 && local_ref))
c175a657
L		 1394 {
1395convert_load:
1396 if (opcode == 0x8b)
1397 {
1398 if (to_reloc_32)
1399 {
1400 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1401 "mov $foo, %reg2" with R_386_32. */
1402 r_type = R_386_32;
1403 modrm = 0xc0 | (modrm & 0x38) >> 3;
1404 bfd_put_8 (abfd, modrm, contents + roff - 1);
1405 opcode = 0xc7;
1406 }
1407 else
1408 {
1409 /* Convert "mov foo@GOT(%reg1), %reg2" to
1410 "lea foo@GOTOFF(%reg1), %reg2". */
1411 r_type = R_386_GOTOFF;
1412 opcode = 0x8d;
1413 }
1414 }
1415 else
1416 {
1417 /* Only R_386_32 is supported. */
1418 if (!to_reloc_32)
1419 return TRUE;
1420
1421 if (opcode == 0x85)
1422 {
1423 /* Convert "test %reg1, foo@GOT(%reg2)" to
1424 "test $foo, %reg1". */
1425 modrm = 0xc0 | (modrm & 0x38) >> 3;
1426 opcode = 0xf7;
1427 }
1428 else
1429 {
1430 /* Convert "binop foo@GOT(%reg1), %reg2" to
1431 "binop $foo, %reg2". */
1432 modrm = (0xc0
1433 | (modrm & 0x38) >> 3
1434 | (opcode & 0x3c));
1435 opcode = 0x81;
1436 }
1437 bfd_put_8 (abfd, modrm, contents + roff - 1);
1438 r_type = R_386_32;
1439 }
1440
1441 bfd_put_8 (abfd, opcode, contents + roff - 2);
1442 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
6999821f 1443 *r_type_p = r_type;
c175a657
L		 1444 }
1445 }
1446
1447 return TRUE;
1448}
1449
c1d11331
L		 1450/* Rename some of the generic section flags to better document how they
1451 are used here. */
6999821f 1452#define check_relocs_failed sec_flg0
c1d11331 1453
252b5132 1454/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1455 calculate needed space in the global offset table, procedure linkage
1456 table, and dynamic reloc sections. */
252b5132 1457
b34976b6 1458static bfd_boolean
55fd94b0
AM		 1459elf_i386_check_relocs (bfd *abfd,
1460 struct bfd_link_info *info,
1461 asection *sec,
1462 const Elf_Internal_Rela *relocs)
252b5132 1463{
0afcef53 1464 struct elf_x86_link_hash_table *htab;
252b5132
RH		 1465 Elf_Internal_Shdr *symtab_hdr;
1466 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1467 const Elf_Internal_Rela *rel;
1468 const Elf_Internal_Rela *rel_end;
252b5132 1469 asection *sreloc;
bedfd056 1470 bfd_byte *contents;
252b5132 1471
0e1862bb 1472 if (bfd_link_relocatable (info))
b34976b6 1473 return TRUE;
252b5132 1474
081b1afe
L		 1475 /* Don't do anything special with non-loaded, non-alloced sections.
1476 In particular, any relocs in such sections should not affect GOT
1477 and PLT reference counting (ie. we don't allow them to create GOT
1478 or PLT entries), there's no possibility or desire to optimize TLS
1479 relocs, and there's not much point in propagating relocs to shared
1480 libs that the dynamic linker won't relocate. */
1481 if ((sec->flags & SEC_ALLOC) == 0)
1482 return TRUE;
1483
0afcef53 1484 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6 1485 if (htab == NULL)
c337a162
L		 1486 {
1487 sec->check_relocs_failed = 1;
1488 return FALSE;
1489 }
4dfe6ac6 1490
fe53b4a4
L		 1491 BFD_ASSERT (is_x86_elf (abfd, htab));
1492
bedfd056
L		 1493 /* Get the section contents. */
1494 if (elf_section_data (sec)->this_hdr.contents != NULL)
1495 contents = elf_section_data (sec)->this_hdr.contents;
1496 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1497 {
1498 sec->check_relocs_failed = 1;
1499 return FALSE;
1500 }
1501
0ffa91dd 1502 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1503 sym_hashes = elf_sym_hashes (abfd);
252b5132 1504
252b5132
RH		 1505 sreloc = NULL;
1506
1507 rel_end = relocs + sec->reloc_count;
1508 for (rel = relocs; rel < rel_end; rel++)
1509 {
13ae64f3 1510 unsigned int r_type;
d42c267e 1511 unsigned int r_symndx;
252b5132 1512 struct elf_link_hash_entry *h;
0afcef53 1513 struct elf_x86_link_hash_entry *eh;
4c544807
L		 1514 Elf_Internal_Sym *isym;
1515 const char *name;
06a6a421 1516 bfd_boolean size_reloc;
252b5132
RH		 1517
1518 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1519 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1520
d9bc7a44 1521 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1522 {
695344c0 1523 /* xgettext:c-format */
4eca0228
AM		 1524 _bfd_error_handler (_("%B: bad symbol index: %d"),
1525 abfd, r_symndx);
c337a162 1526 goto error_return;
f5f31454
L		 1527 }
1528
252b5132 1529 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1530 {
1531 /* A local symbol. */
c2e61a4e
L		 1532 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1533 abfd, r_symndx);
1534 if (isym == NULL)
c337a162 1535 goto error_return;
c25bc9fc
L		 1536
1537 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1538 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1539 {
0afcef53 1540 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1541 if (h == NULL)
c337a162 1542 goto error_return;
6bbec505 1543
c25bc9fc 1544 /* Fake a STT_GNU_IFUNC symbol. */
6322e5c5
L		 1545 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1546 isym, NULL);
c25bc9fc
L		 1547 h->type = STT_GNU_IFUNC;
1548 h->def_regular = 1;
1549 h->ref_regular = 1;
1550 h->forced_local = 1;
1551 h->root.type = bfd_link_hash_defined;
1552 }
1553 else
1554 h = NULL;
1555 }
252b5132 1556 else
71cb9464 1557 {
4c544807 1558 isym = NULL;
71cb9464
L		 1559 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1560 while (h->root.type == bfd_link_hash_indirect
1561 || h->root.type == bfd_link_hash_warning)
1562 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1563 }
cbe950e9 1564
0afcef53 1565 eh = (struct elf_x86_link_hash_entry *) h;
c25bc9fc
L		 1566 if (h != NULL)
1567 {
f604c2a2
L		 1568 if (r_type == R_386_GOTOFF)
1569 eh->gotoff_ref = 1;
cbe950e9 1570
ad1e85de
L		 1571 /* It is referenced by a non-shared object. */
1572 h->ref_regular = 1;
bc4e12de 1573 h->root.non_ir_ref_regular = 1;
13a2df29
L		 1574
1575 if (h->type == STT_GNU_IFUNC)
1576 elf_tdata (info->output_bfd)->has_gnu_symbols
1577 |= elf_gnu_symbol_ifunc;
71cb9464 1578 }
252b5132 1579
6999821f
L		 1580 if (r_type == R_386_GOT32X
1581 && (h == NULL || h->type != STT_GNU_IFUNC))
1582 {
1583 Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
1584 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
1585 &r_type, irel, h, info))
1586 goto error_return;
1587 }
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 }
1936 }
1937
bedfd056
L		 1938 if (elf_section_data (sec)->this_hdr.contents != contents)
1939 {
1940 if (!info->keep_memory)
1941 free (contents);
1942 else
1943 {
1944 /* Cache the section contents for elf_link_input_bfd. */
1945 elf_section_data (sec)->this_hdr.contents = contents;
1946 }
1947 }
1948
b34976b6 1949 return TRUE;
c337a162
L		 1950
1951error_return:
bedfd056
L		 1952 if (elf_section_data (sec)->this_hdr.contents != contents)
1953 free (contents);
c337a162
L		 1954 sec->check_relocs_failed = 1;
1955 return FALSE;
252b5132
RH		 1956}
1957
38701953
AM		 1958/* Set the correct type for an x86 ELF section. We do this by the
1959 section name, which is a hack, but ought to work. */
1960
b34976b6 1961static bfd_boolean
55fd94b0
AM		 1962elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1963 Elf_Internal_Shdr *hdr,
1964 asection *sec)
38701953 1965{
91d6fa6a 1966 const char *name;
38701953
AM		 1967
1968 name = bfd_get_section_name (abfd, sec);
1969
1970 /* This is an ugly, but unfortunately necessary hack that is
1971 needed when producing EFI binaries on x86. It tells
1972 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1973 containing ELF relocation info. We need this hack in order to
1974 be able to generate ELF binaries that can be translated into
1975 EFI applications (which are essentially COFF objects). Those
1976 files contain a COFF ".reloc" section inside an ELFNN object,
1977 which would normally cause BFD to segfault because it would
1978 attempt to interpret this section as containing relocation
1979 entries for section "oc". With this hack enabled, ".reloc"
1980 will be treated as a normal data section, which will avoid the
1981 segfault. However, you won't be able to create an ELFNN binary
1982 with a section named "oc" that needs relocations, but that's
1983 the kind of ugly side-effects you get when detecting section
1984 types based on their names... In practice, this limitation is
1985 unlikely to bite. */
1986 if (strcmp (name, ".reloc") == 0)
1987 hdr->sh_type = SHT_PROGBITS;
1988
b34976b6 1989 return TRUE;
38701953
AM		 1990}
1991
13ae64f3
JJ		 1992/* Return the relocation value for @tpoff relocation
1993 if STT_TLS virtual address is ADDRESS. */
1994
1995static bfd_vma
eb4ff4d6 1996elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 1997{
e1918d23 1998 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 1999 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2000 bfd_vma static_tls_size;
13ae64f3 2001
e1918d23
AM		 2002 /* If tls_sec is NULL, we should have signalled an error already. */
2003 if (htab->tls_sec == NULL)
6a30718d 2004 return 0;
7dc98aea
RO		 2005
2006 /* Consider special static TLS alignment requirements. */
2007 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2008 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 2009}
2010
252b5132
RH		 2011/* Relocate an i386 ELF section. */
2012
b34976b6 2013static bfd_boolean
55fd94b0
AM		 2014elf_i386_relocate_section (bfd *output_bfd,
2015 struct bfd_link_info *info,
2016 bfd *input_bfd,
2017 asection *input_section,
2018 bfd_byte *contents,
2019 Elf_Internal_Rela *relocs,
2020 Elf_Internal_Sym *local_syms,
2021 asection **local_sections)
252b5132 2022{
0afcef53 2023 struct elf_x86_link_hash_table *htab;
252b5132
RH		 2024 Elf_Internal_Shdr *symtab_hdr;
2025 struct elf_link_hash_entry **sym_hashes;
2026 bfd_vma *local_got_offsets;
67a4f2b7 2027 bfd_vma *local_tlsdesc_gotents;
252b5132 2028 Elf_Internal_Rela *rel;
60f2e42e 2029 Elf_Internal_Rela *wrel;
252b5132 2030 Elf_Internal_Rela *relend;
3348747a 2031 bfd_boolean is_vxworks_tls;
25e762b9 2032 unsigned plt_entry_size;
252b5132 2033
c337a162
L		 2034 /* Skip if check_relocs failed. */
2035 if (input_section->check_relocs_failed)
2036 return FALSE;
2037
0afcef53 2038 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2039 if (htab == NULL)
2040 return FALSE;
fe53b4a4
L		 2041
2042 BFD_ASSERT (is_x86_elf (input_bfd, htab));
2043
0ffa91dd 2044 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 2045 sym_hashes = elf_sym_hashes (input_bfd);
2046 local_got_offsets = elf_local_got_offsets (input_bfd);
0afcef53 2047 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 2048 /* We have to handle relocations in vxworks .tls_vars sections
2049 specially, because the dynamic loader is 'weird'. */
9a742a90 2050 is_vxworks_tls = (htab->is_vxworks
0e1862bb 2051 && bfd_link_pic (info)
3348747a
NS		 2052 && !strcmp (input_section->output_section->name,
2053 ".tls_vars"));
252b5132 2054
0afcef53 2055 _bfd_x86_elf_set_tls_module_base (info);
9f03412a 2056
765e526c 2057 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 2058
60f2e42e 2059 rel = wrel = relocs;
252b5132 2060 relend = relocs + input_section->reloc_count;
60f2e42e 2061 for (; rel < relend; wrel++, rel++)
252b5132 2062 {
419414ea 2063 unsigned int r_type, r_type_tls;
252b5132
RH		 2064 reloc_howto_type *howto;
2065 unsigned long r_symndx;
2066 struct elf_link_hash_entry *h;
0afcef53 2067 struct elf_x86_link_hash_entry *eh;
252b5132
RH		 2068 Elf_Internal_Sym *sym;
2069 asection *sec;
dd7e64d4 2070 bfd_vma off, offplt, plt_offset;
252b5132 2071 bfd_vma relocation;
b34976b6 2072 bfd_boolean unresolved_reloc;
252b5132 2073 bfd_reloc_status_type r;
1b452ec6 2074 unsigned int indx;
13ae64f3 2075 int tls_type;
1788fc08 2076 bfd_vma st_size;
dd7e64d4 2077 asection *resolved_plt;
aec6b87e 2078 bfd_boolean resolved_to_zero;
e133d005 2079 bfd_boolean relative_reloc;
252b5132
RH		 2080
2081 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2082 if (r_type == R_386_GNU_VTINHERIT
2083 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 2084 {
2085 if (wrel != rel)
2086 *wrel = *rel;
2087 continue;
2088 }
dc47f327 2089
55fd94b0 2090 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 2091 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2092 >= R_386_ext - R_386_standard)
2093 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520 2094 >= R_386_ext2 - R_386_ext))
47aeb64c
NC		 2095 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2096
1b452ec6 2097 howto = elf_howto_table + indx;
252b5132
RH		 2098
2099 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 2100 h = NULL;
2101 sym = NULL;
2102 sec = NULL;
b34976b6 2103 unresolved_reloc = FALSE;
252b5132
RH		 2104 if (r_symndx < symtab_hdr->sh_info)
2105 {
2106 sym = local_syms + r_symndx;
2107 sec = local_sections[r_symndx];
2108 relocation = (sec->output_section->vma
2109 + sec->output_offset
2110 + sym->st_value);
1788fc08 2111 st_size = sym->st_size;
ab96bf03
AM		 2112
2113 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2114 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 2115 || (bfd_link_relocatable (info)
ab96bf03 2116 && sec->output_offset != 0)))
f8df10f4 2117 {
f8df10f4 2118 bfd_vma addend;
4a335f3d 2119 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2120
4a335f3d 2121 switch (howto->size)
f8df10f4 2122 {
4a335f3d
AM		 2123 case 0:
2124 addend = bfd_get_8 (input_bfd, where);
2125 if (howto->pc_relative)
2126 {
2127 addend = (addend ^ 0x80) - 0x80;
2128 addend += 1;
2129 }
2130 break;
2131 case 1:
2132 addend = bfd_get_16 (input_bfd, where);
2133 if (howto->pc_relative)
2134 {
2135 addend = (addend ^ 0x8000) - 0x8000;
2136 addend += 2;
2137 }
2138 break;
2139 case 2:
2140 addend = bfd_get_32 (input_bfd, where);
2141 if (howto->pc_relative)
2142 {
2143 addend = (addend ^ 0x80000000) - 0x80000000;
2144 addend += 4;
2145 }
2146 break;
2147 default:
2148 abort ();
f8df10f4
JJ		 2149 }
2150
0e1862bb 2151 if (bfd_link_relocatable (info))
ab96bf03
AM		 2152 addend += sec->output_offset;
2153 else
2154 {
2155 asection *msec = sec;
2156 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2157 addend);
2158 addend -= relocation;
2159 addend += msec->output_section->vma + msec->output_offset;
2160 }
4a335f3d
AM		 2161
2162 switch (howto->size)
2163 {
2164 case 0:
16a10388 2165 /* FIXME: overflow checks. */
4a335f3d
AM		 2166 if (howto->pc_relative)
2167 addend -= 1;
2168 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2169 break;
2170 case 1:
2171 if (howto->pc_relative)
2172 addend -= 2;
2173 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2174 break;
2175 case 2:
2176 if (howto->pc_relative)
2177 addend -= 4;
2178 bfd_put_32 (input_bfd, addend, where);
2179 break;
2180 }
f8df10f4 2181 }
0e1862bb 2182 else if (!bfd_link_relocatable (info)
1f85278f 2183 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 2184 {
2185 /* Relocate against local STT_GNU_IFUNC symbol. */
0afcef53
L		 2186 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2187 FALSE);
c25bc9fc
L		 2188 if (h == NULL)
2189 abort ();
2190
23209a78 2191 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 2192 h->root.u.def.value = sym->st_value;
2193 h->root.u.def.section = sec;
2194 }
252b5132
RH		 2195 }
2196 else
2197 {
3d540e93 2198 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 2199 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 2200
b2a8e766
AM		 2201 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2202 r_symndx, symtab_hdr, sym_hashes,
2203 h, sec, relocation,
62d887d4 2204 unresolved_reloc, warned, ignored);
1788fc08 2205 st_size = h->size;
252b5132
RH		 2206 }
2207
dbaa2011 2208 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 2209 {
2210 _bfd_clear_contents (howto, input_bfd, input_section,
2211 contents + rel->r_offset);
2212 wrel->r_offset = rel->r_offset;
2213 wrel->r_info = 0;
2214 wrel->r_addend = 0;
2215
2216 /* For ld -r, remove relocations in debug sections against
2217 sections defined in discarded sections. Not done for
2218 eh_frame editing code expects to be present. */
2219 if (bfd_link_relocatable (info)
2220 && (input_section->flags & SEC_DEBUGGING))
2221 wrel--;
2222
2223 continue;
2224 }
9635fe29 2225
0e1862bb 2226 if (bfd_link_relocatable (info))
2d5da473
L		 2227 {
2228 if (wrel != rel)
2229 *wrel = *rel;
2230 continue;
2231 }
ab96bf03 2232
0afcef53 2233 eh = (struct elf_x86_link_hash_entry *) h;
ee2fdd6f 2234
cbe950e9
L		 2235 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2236 it here if it is defined in a non-shared object. */
2237 if (h != NULL
2238 && h->type == STT_GNU_IFUNC
2239 && h->def_regular)
2240 {
ee2fdd6f 2241 asection *gotplt, *base_got;
cbe950e9 2242 bfd_vma plt_index;
4c544807 2243 const char *name;
cbe950e9 2244
97dc35c8
L		 2245 if ((input_section->flags & SEC_ALLOC) == 0)
2246 {
2247 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2248 sections because such sections are not SEC_ALLOC and
2249 thus ld.so will not process them. */
2250 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 2251 continue;
97dc35c8
L		 2252 abort ();
2253 }
cbe950e9
L		 2254
2255 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 2256 if (htab->elf.splt != NULL)
cbe950e9 2257 {
ee2fdd6f
L		 2258 if (htab->plt_second != NULL)
2259 {
2260 resolved_plt = htab->plt_second;
2261 plt_offset = eh->plt_second.offset;
2262 }
2263 else
2264 {
2265 resolved_plt = htab->elf.splt;
2266 plt_offset = h->plt.offset;
2267 }
6de2ae4a 2268 gotplt = htab->elf.sgotplt;
cbe950e9
L		 2269 }
2270 else
2271 {
ee2fdd6f
L		 2272 resolved_plt = htab->elf.iplt;
2273 plt_offset = h->plt.offset;
6de2ae4a 2274 gotplt = htab->elf.igotplt;
cbe950e9
L		 2275 }
2276
cbe950e9
L		 2277 switch (r_type)
2278 {
2279 default:
233cc9c1 2280 break;
cbe950e9
L		 2281
2282 case R_386_GOT32:
02a86693 2283 case R_386_GOT32X:
6de2ae4a 2284 base_got = htab->elf.sgot;
cbe950e9
L		 2285 off = h->got.offset;
2286
7afd84dc 2287 if (base_got == NULL)
cbe950e9
L		 2288 abort ();
2289
7afd84dc 2290 if (off == (bfd_vma) -1)
cbe950e9 2291 {
7afd84dc
L		 2292 /* We can't use h->got.offset here to save state, or
2293 even just remember the offset, as finish_dynamic_symbol
2294 would use that as offset into .got. */
6bbec505 2295
233cc9c1
L		 2296 if (h->plt.offset == (bfd_vma) -1)
2297 abort ();
2298
6de2ae4a 2299 if (htab->elf.splt != NULL)
7afd84dc 2300 {
f604c2a2 2301 plt_index = (h->plt.offset / plt_entry_size
765e526c 2302 - htab->plt.has_plt0);
7afd84dc 2303 off = (plt_index + 3) * 4;
6de2ae4a 2304 base_got = htab->elf.sgotplt;
7afd84dc 2305 }
cbe950e9
L		 2306 else
2307 {
25e762b9 2308 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 2309 off = plt_index * 4;
6de2ae4a 2310 base_got = htab->elf.igotplt;
7afd84dc
L		 2311 }
2312
2313 if (h->dynindx == -1
2314 || h->forced_local
2315 || info->symbolic)
2316 {
2317 /* This references the local defitionion. We must
2318 initialize this entry in the global offset table.
2319 Since the offset must always be a multiple of 8,
2320 we use the least significant bit to record
2321 whether we have initialized it already.
2322
2323 When doing a dynamic link, we create a .rela.got
2324 relocation entry to initialize the value. This
2325 is done in the finish_dynamic_symbol routine. */
2326 if ((off & 1) != 0)
2327 off &= ~1;
2328 else
2329 {
2330 bfd_put_32 (output_bfd, relocation,
2331 base_got->contents + off);
2332 h->got.offset |= 1;
2333 }
cbe950e9 2334 }
cbe950e9 2335
7afd84dc 2336 relocation = off;
7afd84dc
L		 2337 }
2338 else
ca8c86ef
L		 2339 relocation = (base_got->output_section->vma
2340 + base_got->output_offset + off
2341 - gotplt->output_section->vma
2342 - gotplt->output_offset);
2343
2a568401
L		 2344 if (rel->r_offset > 1
2345 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2346 && *(contents + rel->r_offset - 2) != 0x8d)
712ec279
L		 2347 {
2348 if (bfd_link_pic (info))
2349 goto disallow_got32;
2350
2351 /* Add the GOT base if there is no base register. */
2352 relocation += (gotplt->output_section->vma
2353 + gotplt->output_offset);
2354 }
2355 else if (htab->elf.splt == NULL)
2356 {
2357 /* Adjust for static executables. */
2358 relocation += gotplt->output_offset;
2359 }
0018b0a3 2360
cbe950e9 2361 goto do_relocation;
233cc9c1
L		 2362 }
2363
2364 if (h->plt.offset == (bfd_vma) -1)
2365 {
2366 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2367 if (r_type == R_386_32
2368 && (input_section->flags & SEC_CODE) == 0)
2369 goto do_ifunc_pointer;
2370 goto bad_ifunc_reloc;
2371 }
2372
ee2fdd6f
L		 2373 relocation = (resolved_plt->output_section->vma
2374 + resolved_plt->output_offset + plt_offset);
233cc9c1
L		 2375
2376 switch (r_type)
2377 {
2378 default:
2379bad_ifunc_reloc:
2380 if (h->root.root.string)
2381 name = h->root.root.string;
2382 else
2383 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2384 NULL);
4eca0228 2385 _bfd_error_handler
695344c0 2386 /* xgettext:c-format */
233cc9c1
L		 2387 (_("%B: relocation %s against STT_GNU_IFUNC "
2388 "symbol `%s' isn't supported"), input_bfd,
2389 howto->name, name);
2390 bfd_set_error (bfd_error_bad_value);
2391 return FALSE;
2392
2393 case R_386_32:
2394 /* Generate dynamic relcoation only when there is a
2395 non-GOT reference in a shared object. */
2396 if ((bfd_link_pic (info) && h->non_got_ref)
2397 || h->plt.offset == (bfd_vma) -1)
2398 {
2399 Elf_Internal_Rela outrel;
2400 asection *sreloc;
2401 bfd_vma offset;
2402
2403do_ifunc_pointer:
2404 /* Need a dynamic relocation to get the real function
2405 adddress. */
2406 offset = _bfd_elf_section_offset (output_bfd,
2407 info,
2408 input_section,
2409 rel->r_offset);
2410 if (offset == (bfd_vma) -1
2411 || offset == (bfd_vma) -2)
2412 abort ();
2413
2414 outrel.r_offset = (input_section->output_section->vma
2415 + input_section->output_offset
2416 + offset);
2417
2418 if (h->dynindx == -1
2419 || h->forced_local
2420 || bfd_link_executable (info))
2421 {
6322e5c5
L		 2422 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
2423 h->root.root.string,
2424 h->root.u.def.section->owner);
2425
233cc9c1
L		 2426 /* This symbol is resolved locally. */
2427 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2428 bfd_put_32 (output_bfd,
2429 (h->root.u.def.value
2430 + h->root.u.def.section->output_section->vma
2431 + h->root.u.def.section->output_offset),
2432 contents + offset);
2433 }
2434 else
2435 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2436
2437 /* Dynamic relocations are stored in
2438 1. .rel.ifunc section in PIC object.
2439 2. .rel.got section in dynamic executable.
2440 3. .rel.iplt section in static executable. */
2441 if (bfd_link_pic (info))
2442 sreloc = htab->elf.irelifunc;
2443 else if (htab->elf.splt != NULL)
2444 sreloc = htab->elf.srelgot;
2445 else
2446 sreloc = htab->elf.irelplt;
2447 elf_append_rel (output_bfd, sreloc, &outrel);
2448
2449 /* If this reloc is against an external symbol, we
2450 do not want to fiddle with the addend. Otherwise,
2451 we need to include the symbol value so that it
2452 becomes an addend for the dynamic reloc. For an
2453 internal symbol, we have updated addend. */
2454 continue;
2455 }
2456 /* FALLTHROUGH */
2457 case R_386_PC32:
2458 case R_386_PLT32:
2459 goto do_relocation;
cbe950e9
L		 2460
2461 case R_386_GOTOFF:
2462 relocation -= (gotplt->output_section->vma
2463 + gotplt->output_offset);
2464 goto do_relocation;
2465 }
2466 }
2467
aec6b87e 2468 resolved_to_zero = (eh != NULL
c5bce5c6 2469 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
aec6b87e 2470
252b5132
RH		 2471 switch (r_type)
2472 {
02a86693
L		 2473 case R_386_GOT32X:
2474 /* Avoid optimizing _DYNAMIC since ld.so may use its
2475 link-time address. */
2476 if (h == htab->elf.hdynamic)
2477 goto r_386_got32;
2478
2479 if (bfd_link_pic (info))
2480 {
2481 /* It is OK to convert mov to lea and convert indirect
2482 branch to direct branch. It is OK to convert adc,
2483 add, and, cmp, or, sbb, sub, test, xor only when PIC
2484 is false. */
02e2aef8
L		 2485 unsigned int opcode, addend;
2486 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
2487 if (addend != 0)
2488 goto r_386_got32;
2489 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
02a86693
L		 2490 if (opcode != 0x8b && opcode != 0xff)
2491 goto r_386_got32;
2492 }
2493
2494 /* Resolve "mov GOT[(%reg)], %reg",
2495 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
2496 and "binop foo@GOT[(%reg)], %reg". */
2497 if (h == NULL
2498 || (h->plt.offset == (bfd_vma) -1
2499 && h->got.offset == (bfd_vma) -1)
2500 || htab->elf.sgotplt == NULL)
2501 abort ();
2502
2503 offplt = (htab->elf.sgotplt->output_section->vma
2504 + htab->elf.sgotplt->output_offset);
2505
2506 /* It is relative to .got.plt section. */
2507 if (h->got.offset != (bfd_vma) -1)
32875eb1
L		 2508 /* Use GOT entry. Mask off the least significant bit in
2509 GOT offset which may be set by R_386_GOT32 processing
2510 below. */
02a86693
L		 2511 relocation = (htab->elf.sgot->output_section->vma
2512 + htab->elf.sgot->output_offset
32875eb1 2513 + (h->got.offset & ~1) - offplt);
02a86693
L		 2514 else
2515 /* Use GOTPLT entry. */
f604c2a2 2516 relocation = (h->plt.offset / plt_entry_size
765e526c 2517 - htab->plt.has_plt0 + 3) * 4;
02a86693
L		 2518
2519 if (!bfd_link_pic (info))
2520 {
2521 /* If not PIC, add the .got.plt section address for
a3718e9e 2522 baseless addressing. */
02a86693 2523 unsigned int modrm;
02e2aef8 2524 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
02a86693
L		 2525 if ((modrm & 0xc7) == 0x5)
2526 relocation += offplt;
2527 }
2528
2529 unresolved_reloc = FALSE;
2530 break;
2531
252b5132 2532 case R_386_GOT32:
02a86693 2533r_386_got32:
252b5132
RH		 2534 /* Relocation is to the entry for this symbol in the global
2535 offset table. */
6de2ae4a 2536 if (htab->elf.sgot == NULL)
ffb2e45b 2537 abort ();
252b5132 2538
e133d005 2539 relative_reloc = FALSE;
252b5132
RH		 2540 if (h != NULL)
2541 {
b34976b6 2542 bfd_boolean dyn;
252b5132
RH		 2543
2544 off = h->got.offset;
ebe50bae 2545 dyn = htab->elf.dynamic_sections_created;
0e1862bb
L		 2546 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2547 bfd_link_pic (info),
2548 h)
2549 || (bfd_link_pic (info)
6999821f 2550 && SYMBOL_REFERENCES_LOCAL_P (info, h))
ef5aade5
L		 2551 || (ELF_ST_VISIBILITY (h->other)
2552 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2553 {
2554 /* This is actually a static link, or it is a
2555 -Bsymbolic link and the symbol is defined
2556 locally, or the symbol was forced to be local
2557 because of a version file. We must initialize
2558 this entry in the global offset table. Since the
2559 offset must always be a multiple of 4, we use the
2560 least significant bit to record whether we have
2561 initialized it already.
2562
2563 When doing a dynamic link, we create a .rel.got
2564 relocation entry to initialize the value. This
2565 is done in the finish_dynamic_symbol routine. */
2566 if ((off & 1) != 0)
2567 off &= ~1;
2568 else
2569 {
2570 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2571 htab->elf.sgot->contents + off);
252b5132 2572 h->got.offset |= 1;
e133d005
L		 2573
2574 if (h->dynindx == -1
2575 && !h->forced_local
2576 && h->root.type != bfd_link_hash_undefweak
0dc9a308 2577 && bfd_link_pic (info))
e133d005
L		 2578 {
2579 /* PR ld/21402: If this symbol isn't dynamic
0dc9a308 2580 in PIC, generate R_386_RELATIVE here. */
e133d005
L		 2581 eh->no_finish_dynamic_symbol = 1;
2582 relative_reloc = TRUE;
2583 }
252b5132
RH		 2584 }
2585 }
8c694914 2586 else
b34976b6 2587 unresolved_reloc = FALSE;
252b5132
RH		 2588 }
2589 else
2590 {
ffb2e45b
AM		 2591 if (local_got_offsets == NULL)
2592 abort ();
252b5132
RH		 2593
2594 off = local_got_offsets[r_symndx];
2595
2596 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2597 the least significant bit to record whether we have
2598 already generated the necessary reloc. */
252b5132
RH		 2599 if ((off & 1) != 0)
2600 off &= ~1;
2601 else
2602 {
6725bdbf 2603 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2604 htab->elf.sgot->contents + off);
e133d005 2605 local_got_offsets[r_symndx] |= 1;
252b5132 2606
0e1862bb 2607 if (bfd_link_pic (info))
e133d005 2608 relative_reloc = TRUE;
252b5132 2609 }
252b5132
RH		 2610 }
2611
e133d005
L		 2612 if (relative_reloc)
2613 {
2614 asection *s;
2615 Elf_Internal_Rela outrel;
2616
2617 s = htab->elf.srelgot;
2618 if (s == NULL)
2619 abort ();
2620
2621 outrel.r_offset = (htab->elf.sgot->output_section->vma
2622 + htab->elf.sgot->output_offset
2623 + off);
2624 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2625 elf_append_rel (output_bfd, s, &outrel);
2626 }
2627
ffb2e45b
AM		 2628 if (off >= (bfd_vma) -2)
2629 abort ();
2630
74d7f0aa
L		 2631 relocation = (htab->elf.sgot->output_section->vma
2632 + htab->elf.sgot->output_offset + off);
2a568401
L		 2633 if (rel->r_offset > 1
2634 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2635 && *(contents + rel->r_offset - 2) != 0x8d)
74d7f0aa
L		 2636 {
2637 if (bfd_link_pic (info))
2638 {
2639 /* For PIC, disallow R_386_GOT32 without a base
2a568401
L		 2640 register, except for "lea foo@GOT, %reg", since
2641 we don't know what the GOT base is. */
74d7f0aa
L		 2642 const char *name;
2643
712ec279 2644disallow_got32:
a5def14f 2645 if (h == NULL || h->root.root.string == NULL)
74d7f0aa
L		 2646 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2647 NULL);
2648 else
2649 name = h->root.root.string;
2650
4eca0228 2651 _bfd_error_handler
695344c0 2652 /* xgettext:c-format */
63a5468a
AM		 2653 (_("%B: direct GOT relocation %s against `%s'"
2654 " without base register can not be used"
2655 " when making a shared object"),
712ec279 2656 input_bfd, howto->name, name);
74d7f0aa
L		 2657 bfd_set_error (bfd_error_bad_value);
2658 return FALSE;
2659 }
2660 }
2661 else
2662 {
2663 /* Subtract the .got.plt section address only with a base
2664 register. */
2665 relocation -= (htab->elf.sgotplt->output_section->vma
2666 + htab->elf.sgotplt->output_offset);
2667 }
2668
252b5132
RH		 2669 break;
2670
2671 case R_386_GOTOFF:
2672 /* Relocation is relative to the start of the global offset
2673 table. */
2674
3d949995
L		 2675 /* Check to make sure it isn't a protected function or data
2676 symbol for shared library since it may not be local when
2677 used as function address or with copy relocation. We also
e3c0e327 2678 need to make sure that a symbol is referenced locally. */
0e1862bb 2679 if (!bfd_link_executable (info) && h)
90f487df 2680 {
41bed6dd
L		 2681 if (!h->def_regular)
2682 {
2683 const char *v;
2684
2685 switch (ELF_ST_VISIBILITY (h->other))
2686 {
2687 case STV_HIDDEN:
2688 v = _("hidden symbol");
2689 break;
2690 case STV_INTERNAL:
2691 v = _("internal symbol");
2692 break;
2693 case STV_PROTECTED:
2694 v = _("protected symbol");
2695 break;
2696 default:
2697 v = _("symbol");
2698 break;
2699 }
2700
4eca0228 2701 _bfd_error_handler
695344c0 2702 /* xgettext:c-format */
63a5468a
AM		 2703 (_("%B: relocation R_386_GOTOFF against undefined %s"
2704 " `%s' can not be used when making a shared object"),
41bed6dd
L		 2705 input_bfd, v, h->root.root.string);
2706 bfd_set_error (bfd_error_bad_value);
2707 return FALSE;
2708 }
6999821f 2709 else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
3d949995
L		 2710 && (h->type == STT_FUNC
2711 || h->type == STT_OBJECT)
41bed6dd
L		 2712 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2713 {
4eca0228 2714 _bfd_error_handler
695344c0 2715 /* xgettext:c-format */
63a5468a
AM		 2716 (_("%B: relocation R_386_GOTOFF against protected %s"
2717 " `%s' can not be used when making a shared object"),
3d949995
L		 2718 input_bfd,
2719 h->type == STT_FUNC ? "function" : "data",
2720 h->root.root.string);
41bed6dd
L		 2721 bfd_set_error (bfd_error_bad_value);
2722 return FALSE;
2723 }
90f487df
L		 2724 }
2725
8c37241b
JJ		 2726 /* Note that sgot is not involved in this
2727 calculation. We always want the start of .got.plt. If we
2728 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2729 permitted by the ABI, we might have to change this
2730 calculation. */
6de2ae4a
L		 2731 relocation -= htab->elf.sgotplt->output_section->vma
2732 + htab->elf.sgotplt->output_offset;
252b5132
RH		 2733 break;
2734
2735 case R_386_GOTPC:
2736 /* Use global offset table as symbol value. */
6de2ae4a
L		 2737 relocation = htab->elf.sgotplt->output_section->vma
2738 + htab->elf.sgotplt->output_offset;
b34976b6 2739 unresolved_reloc = FALSE;
252b5132
RH		 2740 break;
2741
2742 case R_386_PLT32:
2743 /* Relocation is to the entry for this symbol in the
2744 procedure linkage table. */
2745
dd5724d5 2746 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2747 without using the procedure linkage table. */
252b5132
RH		 2748 if (h == NULL)
2749 break;
2750
dd7e64d4
L		 2751 if ((h->plt.offset == (bfd_vma) -1
2752 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 2753 || htab->elf.splt == NULL)
252b5132
RH		 2754 {
2755 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2756 happens when statically linking PIC code, or when
2757 using -Bsymbolic. */
252b5132
RH		 2758 break;
2759 }
2760
dd7e64d4
L		 2761 if (h->plt.offset != (bfd_vma) -1)
2762 {
ee2fdd6f
L		 2763 if (htab->plt_second != NULL)
2764 {
2765 resolved_plt = htab->plt_second;
2766 plt_offset = eh->plt_second.offset;
2767 }
2768 else
2769 {
2770 resolved_plt = htab->elf.splt;
2771 plt_offset = h->plt.offset;
2772 }
dd7e64d4
L		 2773 }
2774 else
2775 {
2776 resolved_plt = htab->plt_got;
2777 plt_offset = eh->plt_got.offset;
2778 }
2779
2780 relocation = (resolved_plt->output_section->vma
2781 + resolved_plt->output_offset
2782 + plt_offset);
b34976b6 2783 unresolved_reloc = FALSE;
252b5132
RH		 2784 break;
2785
1788fc08 2786 case R_386_SIZE32:
1788fc08
L		 2787 /* Set to symbol size. */
2788 relocation = st_size;
2789 /* Fall through. */
2790
252b5132
RH		 2791 case R_386_32:
2792 case R_386_PC32:
3348747a
NS		 2793 if ((input_section->flags & SEC_ALLOC) == 0
2794 || is_vxworks_tls)
ec338859
AM		 2795 break;
2796
aec6b87e
L		 2797 /* Copy dynamic function pointer relocations. Don't generate
2798 dynamic relocations against resolved undefined weak symbols
2799 in PIE, except for R_386_PC32. */
0e1862bb 2800 if ((bfd_link_pic (info)
ef5aade5 2801 && (h == NULL
aec6b87e
L		 2802 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2803 && (!resolved_to_zero
2804 || r_type == R_386_PC32))
2805 || h->root.type != bfd_link_hash_undefweak))
1788fc08 2806 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
f6c52c13 2807 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845 2808 || (ELIMINATE_COPY_RELOCS
0e1862bb 2809 && !bfd_link_pic (info)
12d0ee4a
AM		 2810 && h != NULL
2811 && h->dynindx != -1
aec6b87e
L		 2812 && (!h->non_got_ref
2813 || eh->func_pointer_refcount > 0
2814 || (h->root.type == bfd_link_hash_undefweak
2815 && !resolved_to_zero))
bae420ef
L		 2816 && ((h->def_dynamic && !h->def_regular)
2817 /* Undefined weak symbol is bound locally when
2818 PIC is false. */
2819 || h->root.type == bfd_link_hash_undefweak)))
252b5132 2820 {
947216bf 2821 Elf_Internal_Rela outrel;
b34976b6 2822 bfd_boolean skip, relocate;
0c715baa 2823 asection *sreloc;
252b5132
RH		 2824
2825 /* When generating a shared object, these relocations
2826 are copied into the output file to be resolved at run
2827 time. */
2828
b34976b6
AM		 2829 skip = FALSE;
2830 relocate = FALSE;
252b5132 2831
c629eae0
JJ		 2832 outrel.r_offset =
2833 _bfd_elf_section_offset (output_bfd, info, input_section,
2834 rel->r_offset);
2835 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2836 skip = TRUE;
0bb2d96a 2837 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2838 skip = TRUE, relocate = TRUE;
252b5132
RH		 2839 outrel.r_offset += (input_section->output_section->vma
2840 + input_section->output_offset);
2841
2842 if (skip)
0bb2d96a 2843 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 2844 else if (h != NULL
2845 && h->dynindx != -1
2846 && (r_type == R_386_PC32
4e0c91e4
L		 2847 || !(bfd_link_executable (info)
2848 || SYMBOLIC_BIND (info, h))
f5385ebf 2849 || !h->def_regular))
0bb2d96a 2850 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2851 else
2852 {
5a15f56f 2853 /* This symbol is local, or marked to become local. */
b34976b6 2854 relocate = TRUE;
5a15f56f 2855 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2856 }
2857
cbe950e9 2858 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 2859
62d78908
L		 2860 if (sreloc == NULL || sreloc->contents == NULL)
2861 {
2862 r = bfd_reloc_notsupported;
2863 goto check_relocation_error;
2864 }
0c715baa 2865
59d6ffb2 2866 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 2867
2868 /* If this reloc is against an external symbol, we do
2869 not want to fiddle with the addend. Otherwise, we
2870 need to include the symbol value so that it becomes
2871 an addend for the dynamic reloc. */
0f88be7a 2872 if (! relocate)
252b5132
RH		 2873 continue;
2874 }
252b5132
RH		 2875 break;
2876
37e55690 2877 case R_386_TLS_IE:
0e1862bb 2878 if (!bfd_link_executable (info))
37e55690 2879 {
947216bf 2880 Elf_Internal_Rela outrel;
37e55690 2881 asection *sreloc;
37e55690
JJ		 2882
2883 outrel.r_offset = rel->r_offset
2884 + input_section->output_section->vma
2885 + input_section->output_offset;
2886 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2887 sreloc = elf_section_data (input_section)->sreloc;
2888 if (sreloc == NULL)
2889 abort ();
59d6ffb2 2890 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 2891 }
2892 /* Fall through */
2893
13ae64f3 2894 case R_386_TLS_GD:
67a4f2b7
AO		 2895 case R_386_TLS_GOTDESC:
2896 case R_386_TLS_DESC_CALL:
13ae64f3 2897 case R_386_TLS_IE_32:
37e55690 2898 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2899 tls_type = GOT_UNKNOWN;
2900 if (h == NULL && local_got_offsets)
0afcef53 2901 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
13ae64f3 2902 else if (h != NULL)
0afcef53 2903 tls_type = elf_x86_hash_entry(h)->tls_type;
37e55690
JJ		 2904 if (tls_type == GOT_TLS_IE)
2905 tls_type = GOT_TLS_IE_NEG;
142411ca 2906
419414ea 2907 r_type_tls = r_type;
142411ca
L		 2908 if (! elf_i386_tls_transition (info, input_bfd,
2909 input_section, contents,
2910 symtab_hdr, sym_hashes,
419414ea 2911 &r_type_tls, tls_type, rel,
bedfd056 2912 relend, h, r_symndx, TRUE))
142411ca 2913 return FALSE;
13ae64f3 2914
419414ea 2915 if (r_type_tls == R_386_TLS_LE_32)
13ae64f3 2916 {
82e51918 2917 BFD_ASSERT (! unresolved_reloc);
419414ea 2918 if (r_type == R_386_TLS_GD)
13ae64f3 2919 {
142411ca 2920 unsigned int type;
13ae64f3
JJ		 2921 bfd_vma roff;
2922
2923 /* GD->LE transition. */
6eaa7fb5 2924 type = *(contents + rel->r_offset - 2);
13ae64f3
JJ		 2925 if (type == 0x04)
2926 {
6eaa7fb5
L		 2927 /* Change
2928 leal foo@tlsgd(,%ebx,1), %eax
2929 call ___tls_get_addr@PLT
2930 into:
2931 movl %gs:0, %eax
2932 subl $foo@tpoff, %eax
13ae64f3 2933 (6 byte form of subl). */
142411ca 2934 roff = rel->r_offset + 5;
13ae64f3
JJ		 2935 }
2936 else
2937 {
6eaa7fb5
L		 2938 /* Change
2939 leal foo@tlsgd(%ebx), %eax
2940 call ___tls_get_addr@PLT
2941 nop
2942 or
2943 leal foo@tlsgd(%reg), %eax
2944 call *___tls_get_addr@GOT(%reg)
2945 which may be converted to
2946 addr32 call ___tls_get_addr
2947 into:
2948 movl %gs:0, %eax; subl $foo@tpoff, %eax
142411ca 2949 (6 byte form of subl). */
142411ca 2950 roff = rel->r_offset + 6;
13ae64f3 2951 }
6eaa7fb5
L		 2952 memcpy (contents + roff - 8,
2953 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
eb4ff4d6 2954 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 2955 contents + roff);
6eaa7fb5 2956 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
13ae64f3 2957 rel++;
60f2e42e 2958 wrel++;
13ae64f3
JJ		 2959 continue;
2960 }
419414ea 2961 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 2962 {
2963 /* GDesc -> LE transition.
2964 It's originally something like:
2965 leal x@tlsdesc(%ebx), %eax
2966
2967 leal x@ntpoff, %eax
2968
2969 Registers other than %eax may be set up here. */
2970
142411ca 2971 unsigned int val;
67a4f2b7
AO		 2972 bfd_vma roff;
2973
67a4f2b7 2974 roff = rel->r_offset;
67a4f2b7 2975 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 2976
2977 /* Now modify the instruction as appropriate. */
2978 /* aoliva FIXME: remove the above and xor the byte
2979 below with 0x86. */
2980 bfd_put_8 (output_bfd, val ^ 0x86,
2981 contents + roff - 1);
eb4ff4d6 2982 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 2983 contents + roff);
2984 continue;
2985 }
419414ea 2986 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 2987 {
2988 /* GDesc -> LE transition.
2989 It's originally:
2990 call *(%eax)
2991 Turn it into:
142411ca 2992 xchg %ax,%ax */
67a4f2b7 2993
67a4f2b7 2994 bfd_vma roff;
6bbec505 2995
67a4f2b7 2996 roff = rel->r_offset;
10efb593 2997 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 2998 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2999 continue;
3000 }
419414ea 3001 else if (r_type == R_386_TLS_IE)
13ae64f3 3002 {
142411ca 3003 unsigned int val;
13ae64f3
JJ		 3004
3005 /* IE->LE transition:
37e55690
JJ		 3006 Originally it can be one of:
3007 movl foo, %eax
3008 movl foo, %reg
3009 addl foo, %reg
3010 We change it into:
3011 movl $foo, %eax
3012 movl $foo, %reg
3013 addl $foo, %reg. */
37e55690 3014 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 3015 if (val == 0xa1)
3016 {
3017 /* movl foo, %eax. */
55fd94b0
AM		 3018 bfd_put_8 (output_bfd, 0xb8,
3019 contents + rel->r_offset - 1);
37e55690 3020 }
299bf759 3021 else
37e55690 3022 {
142411ca
L		 3023 unsigned int type;
3024
55fd94b0
AM		 3025 type = bfd_get_8 (input_bfd,
3026 contents + rel->r_offset - 2);
299bf759 3027 switch (type)
26e41594 3028 {
299bf759
L		 3029 case 0x8b:
3030 /* movl */
299bf759
L		 3031 bfd_put_8 (output_bfd, 0xc7,
3032 contents + rel->r_offset - 2);
3033 bfd_put_8 (output_bfd,
3034 0xc0 | ((val >> 3) & 7),
3035 contents + rel->r_offset - 1);
3036 break;
3037 case 0x03:
3038 /* addl */
299bf759
L		 3039 bfd_put_8 (output_bfd, 0x81,
3040 contents + rel->r_offset - 2);
3041 bfd_put_8 (output_bfd,
3042 0xc0 | ((val >> 3) & 7),
3043 contents + rel->r_offset - 1);
3044 break;
3045 default:
3046 BFD_FAIL ();
3047 break;
26e41594 3048 }
37e55690 3049 }
eb4ff4d6 3050 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 3051 contents + rel->r_offset);
3052 continue;
3053 }
3054 else
3055 {
3056 unsigned int val, type;
3057
3058 /* {IE_32,GOTIE}->LE transition:
3059 Originally it can be one of:
13ae64f3 3060 subl foo(%reg1), %reg2
13ae64f3 3061 movl foo(%reg1), %reg2
37e55690 3062 addl foo(%reg1), %reg2
13ae64f3
JJ		 3063 We change it into:
3064 subl $foo, %reg2
37e55690
JJ		 3065 movl $foo, %reg2 (6 byte form)
3066 addl $foo, %reg2. */
13ae64f3
JJ		 3067 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3068 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 3069 if (type == 0x8b)
3070 {
3071 /* movl */
13ae64f3
JJ		 3072 bfd_put_8 (output_bfd, 0xc7,
3073 contents + rel->r_offset - 2);
3074 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3075 contents + rel->r_offset - 1);
3076 }
3077 else if (type == 0x2b)
3078 {
3079 /* subl */
13ae64f3
JJ		 3080 bfd_put_8 (output_bfd, 0x81,
3081 contents + rel->r_offset - 2);
3082 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3083 contents + rel->r_offset - 1);
3084 }
37e55690
JJ		 3085 else if (type == 0x03)
3086 {
3087 /* addl */
3088 bfd_put_8 (output_bfd, 0x81,
3089 contents + rel->r_offset - 2);
3090 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3091 contents + rel->r_offset - 1);
3092 }
13ae64f3
JJ		 3093 else
3094 BFD_FAIL ();
419414ea 3095 if (r_type == R_386_TLS_GOTIE)
eb4ff4d6 3096 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 3097 contents + rel->r_offset);
3098 else
eb4ff4d6 3099 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 3100 contents + rel->r_offset);
13ae64f3
JJ		 3101 continue;
3102 }
3103 }
3104
6de2ae4a 3105 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 3106 abort ();
3107
3108 if (h != NULL)
67a4f2b7
AO		 3109 {
3110 off = h->got.offset;
0afcef53 3111 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
67a4f2b7 3112 }
13ae64f3
JJ		 3113 else
3114 {
3115 if (local_got_offsets == NULL)
3116 abort ();
3117
3118 off = local_got_offsets[r_symndx];
67a4f2b7 3119 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 3120 }
3121
3122 if ((off & 1) != 0)
3123 off &= ~1;
26e41594 3124 else
13ae64f3 3125 {
947216bf 3126 Elf_Internal_Rela outrel;
91d6fa6a 3127 int dr_type;
67a4f2b7 3128 asection *sreloc;
13ae64f3 3129
6de2ae4a 3130 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3131 abort ();
3132
67a4f2b7
AO		 3133 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3134
3135 if (GOT_TLS_GDESC_P (tls_type))
3136 {
59d6ffb2 3137 bfd_byte *loc;
67a4f2b7
AO		 3138 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3139 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 3140 <= htab->elf.sgotplt->size);
3141 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3142 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 3143 + offplt
3144 + htab->sgotplt_jump_table_size);
6de2ae4a 3145 sreloc = htab->elf.srelplt;
67a4f2b7 3146 loc = sreloc->contents;
765e526c 3147 loc += (htab->next_tls_desc_index++
5ae0bfb6 3148 * sizeof (Elf32_External_Rel));
67a4f2b7 3149 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 3150 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 3151 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3152 if (indx == 0)
3153 {
3154 BFD_ASSERT (! unresolved_reloc);
3155 bfd_put_32 (output_bfd,
0afcef53 3156 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3157 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3158 + htab->sgotplt_jump_table_size + 4);
3159 }
3160 else
3161 {
3162 bfd_put_32 (output_bfd, 0,
6de2ae4a 3163 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3164 + htab->sgotplt_jump_table_size + 4);
3165 }
3166 }
3167
6de2ae4a 3168 sreloc = htab->elf.srelgot;
67a4f2b7 3169
6de2ae4a
L		 3170 outrel.r_offset = (htab->elf.sgot->output_section->vma
3171 + htab->elf.sgot->output_offset + off);
13ae64f3 3172
67a4f2b7 3173 if (GOT_TLS_GD_P (tls_type))
13ae64f3 3174 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 3175 else if (GOT_TLS_GDESC_P (tls_type))
3176 goto dr_done;
37e55690
JJ		 3177 else if (tls_type == GOT_TLS_IE_POS)
3178 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 3179 else
3180 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 3181
37e55690 3182 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6 3183 bfd_put_32 (output_bfd,
0afcef53 3184 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3185 htab->elf.sgot->contents + off);
37e55690 3186 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 3187 bfd_put_32 (output_bfd,
0afcef53 3188 _bfd_x86_elf_dtpoff_base (info) - relocation,
6de2ae4a 3189 htab->elf.sgot->contents + off);
67a4f2b7 3190 else if (dr_type != R_386_TLS_DESC)
c366c25e 3191 bfd_put_32 (output_bfd, 0,
6de2ae4a 3192 htab->elf.sgot->contents + off);
13ae64f3 3193 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 3194
59d6ffb2 3195 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 3196
67a4f2b7 3197 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 3198 {
3199 if (indx == 0)
3200 {
82e51918 3201 BFD_ASSERT (! unresolved_reloc);
13ae64f3 3202 bfd_put_32 (output_bfd,
0afcef53 3203 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3204 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3205 }
3206 else
3207 {
3208 bfd_put_32 (output_bfd, 0,
6de2ae4a 3209 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3210 outrel.r_info = ELF32_R_INFO (indx,
3211 R_386_TLS_DTPOFF32);
3212 outrel.r_offset += 4;
59d6ffb2 3213 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 3214 }
3215 }
37e55690
JJ		 3216 else if (tls_type == GOT_TLS_IE_BOTH)
3217 {
3218 bfd_put_32 (output_bfd,
eb4ff4d6 3219 (indx == 0
0afcef53 3220 ? relocation - _bfd_x86_elf_dtpoff_base (info)
eb4ff4d6 3221 : 0),
6de2ae4a 3222 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 3223 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3224 outrel.r_offset += 4;
59d6ffb2 3225 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 3226 }
13ae64f3 3227
67a4f2b7 3228 dr_done:
13ae64f3
JJ		 3229 if (h != NULL)
3230 h->got.offset |= 1;
3231 else
3232 local_got_offsets[r_symndx] |= 1;
3233 }
3234
67a4f2b7
AO		 3235 if (off >= (bfd_vma) -2
3236 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 3237 abort ();
419414ea
L		 3238 if (r_type_tls == R_386_TLS_GOTDESC
3239 || r_type_tls == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3240 {
3241 relocation = htab->sgotplt_jump_table_size + offplt;
3242 unresolved_reloc = FALSE;
3243 }
419414ea 3244 else if (r_type_tls == r_type)
13ae64f3 3245 {
6de2ae4a
L		 3246 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3247 + htab->elf.sgotplt->output_offset;
3248 relocation = htab->elf.sgot->output_section->vma
3249 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 3250 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3251 && tls_type == GOT_TLS_IE_BOTH)
3252 relocation += 4;
3253 if (r_type == R_386_TLS_IE)
8c37241b 3254 relocation += g_o_t;
b34976b6 3255 unresolved_reloc = FALSE;
13ae64f3 3256 }
419414ea 3257 else if (r_type == R_386_TLS_GD)
13ae64f3
JJ		 3258 {
3259 unsigned int val, type;
3260 bfd_vma roff;
3261
3262 /* GD->IE transition. */
6eaa7fb5
L		 3263 type = *(contents + rel->r_offset - 2);
3264 val = *(contents + rel->r_offset - 1);
13ae64f3
JJ		 3265 if (type == 0x04)
3266 {
6eaa7fb5
L		 3267 /* Change
3268 leal foo@tlsgd(,%ebx,1), %eax
3269 call ___tls_get_addr@PLT
3270 into:
3271 movl %gs:0, %eax
3272 subl $foo@gottpoff(%ebx), %eax. */
13ae64f3 3273 val >>= 3;
142411ca 3274 roff = rel->r_offset - 3;
13ae64f3
JJ		 3275 }
3276 else
3277 {
6eaa7fb5
L		 3278 /* Change
3279 leal foo@tlsgd(%ebx), %eax
3280 call ___tls_get_addr@PLT
3281 nop
3282 or
3283 leal foo@tlsgd(%reg), %eax
3284 call *___tls_get_addr@GOT(%reg)
3285 which may be converted to
3286 addr32 call ___tls_get_addr
3287 into:
3288 movl %gs:0, %eax;
3289 subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 3290 roff = rel->r_offset - 2;
3291 }
3292 memcpy (contents + roff,
3293 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3294 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 3295 /* If foo is used only with foo@gotntpoff(%reg) and
3296 foo@indntpoff, but not with foo@gottpoff(%reg), change
3297 subl $foo@gottpoff(%reg), %eax
3298 into:
3299 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 3300 if (tls_type == GOT_TLS_IE_POS)
3301 contents[roff + 6] = 0x03;
8c37241b 3302 bfd_put_32 (output_bfd,
6de2ae4a
L		 3303 htab->elf.sgot->output_section->vma
3304 + htab->elf.sgot->output_offset + off
3305 - htab->elf.sgotplt->output_section->vma
3306 - htab->elf.sgotplt->output_offset,
13ae64f3 3307 contents + roff + 8);
6eaa7fb5 3308 /* Skip R_386_PLT32 and R_386_GOT32X. */
13ae64f3 3309 rel++;
60f2e42e 3310 wrel++;
13ae64f3
JJ		 3311 continue;
3312 }
419414ea 3313 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 3314 {
3315 /* GDesc -> IE transition.
3316 It's originally something like:
3317 leal x@tlsdesc(%ebx), %eax
3318
3319 Change it to:
142411ca 3320 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 3321 or:
3322 movl x@gottpoff(%ebx), %eax # before negl %eax
3323
3324 Registers other than %eax may be set up here. */
3325
67a4f2b7
AO		 3326 bfd_vma roff;
3327
3328 /* First, make sure it's a leal adding ebx to a 32-bit
3329 offset into any register, although it's probably
3330 almost always going to be eax. */
3331 roff = rel->r_offset;
67a4f2b7
AO		 3332
3333 /* Now modify the instruction as appropriate. */
3334 /* To turn a leal into a movl in the form we use it, it
3335 suffices to change the first byte from 0x8d to 0x8b.
3336 aoliva FIXME: should we decide to keep the leal, all
3337 we have to do is remove the statement below, and
3338 adjust the relaxation of R_386_TLS_DESC_CALL. */
3339 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3340
3341 if (tls_type == GOT_TLS_IE_BOTH)
3342 off += 4;
3343
3344 bfd_put_32 (output_bfd,
6de2ae4a
L		 3345 htab->elf.sgot->output_section->vma
3346 + htab->elf.sgot->output_offset + off
3347 - htab->elf.sgotplt->output_section->vma
3348 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 3349 contents + roff);
3350 continue;
3351 }
419414ea 3352 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3353 {
3354 /* GDesc -> IE transition.
3355 It's originally:
3356 call *(%eax)
3357
3358 Change it to:
142411ca 3359 xchg %ax,%ax
67a4f2b7
AO		 3360 or
3361 negl %eax
3362 depending on how we transformed the TLS_GOTDESC above.
3363 */
3364
67a4f2b7
AO		 3365 bfd_vma roff;
3366
67a4f2b7 3367 roff = rel->r_offset;
67a4f2b7
AO		 3368
3369 /* Now modify the instruction as appropriate. */
3370 if (tls_type != GOT_TLS_IE_NEG)
3371 {
10efb593
L		 3372 /* xchg %ax,%ax */
3373 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3374 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3375 }
3376 else
3377 {
3378 /* negl %eax */
3379 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3380 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3381 }
3382
3383 continue;
3384 }
3385 else
3386 BFD_ASSERT (FALSE);
13ae64f3
JJ		 3387 break;
3388
3389 case R_386_TLS_LDM:
142411ca
L		 3390 if (! elf_i386_tls_transition (info, input_bfd,
3391 input_section, contents,
3392 symtab_hdr, sym_hashes,
3393 &r_type, GOT_UNKNOWN, rel,
bedfd056 3394 relend, h, r_symndx, TRUE))
142411ca 3395 return FALSE;
13ae64f3 3396
142411ca
L		 3397 if (r_type != R_386_TLS_LDM)
3398 {
6eaa7fb5
L		 3399 /* LD->LE transition. Change
3400 leal foo@tlsldm(%ebx) %eax
3401 call ___tls_get_addr@PLT
3402 into:
3403 movl %gs:0, %eax
3404 nop
3405 leal 0(%esi,1), %esi
3406 or change
3407 leal foo@tlsldm(%reg) %eax
3408 call *___tls_get_addr@GOT(%reg)
3409 which may be converted to
3410 addr32 call ___tls_get_addr
3411 into:
3412 movl %gs:0, %eax
3413 leal 0(%esi), %esi */
142411ca 3414 BFD_ASSERT (r_type == R_386_TLS_LE_32);
6eaa7fb5
L		 3415 if (*(contents + rel->r_offset + 4) == 0xff
3416 || *(contents + rel->r_offset + 4) == 0x67)
3417 memcpy (contents + rel->r_offset - 2,
3418 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3419 else
3420 memcpy (contents + rel->r_offset - 2,
3421 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 3422 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 3423 rel++;
60f2e42e 3424 wrel++;
13ae64f3
JJ		 3425 continue;
3426 }
3427
6de2ae4a 3428 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 3429 abort ();
3430
0afcef53 3431 off = htab->tls_ld_or_ldm_got.offset;
13ae64f3
JJ		 3432 if (off & 1)
3433 off &= ~1;
3434 else
3435 {
947216bf 3436 Elf_Internal_Rela outrel;
13ae64f3 3437
6de2ae4a 3438 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3439 abort ();
3440
6de2ae4a
L		 3441 outrel.r_offset = (htab->elf.sgot->output_section->vma
3442 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 3443
3444 bfd_put_32 (output_bfd, 0,
6de2ae4a 3445 htab->elf.sgot->contents + off);
13ae64f3 3446 bfd_put_32 (output_bfd, 0,
6de2ae4a 3447 htab->elf.sgot->contents + off + 4);
13ae64f3 3448 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 3449 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
0afcef53 3450 htab->tls_ld_or_ldm_got.offset |= 1;
13ae64f3 3451 }
6de2ae4a
L		 3452 relocation = htab->elf.sgot->output_section->vma
3453 + htab->elf.sgot->output_offset + off
3454 - htab->elf.sgotplt->output_section->vma
3455 - htab->elf.sgotplt->output_offset;
b34976b6 3456 unresolved_reloc = FALSE;
13ae64f3
JJ		 3457 break;
3458
3459 case R_386_TLS_LDO_32:
0e1862bb
L		 3460 if (!bfd_link_executable (info)
3461 || (input_section->flags & SEC_CODE) == 0)
0afcef53 3462 relocation -= _bfd_x86_elf_dtpoff_base (info);
13ae64f3
JJ		 3463 else
3464 /* When converting LDO to LE, we must negate. */
eb4ff4d6 3465 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3466 break;
3467
3468 case R_386_TLS_LE_32:
13ae64f3 3469 case R_386_TLS_LE:
0e1862bb 3470 if (!bfd_link_executable (info))
37e55690 3471 {
947216bf 3472 Elf_Internal_Rela outrel;
37e55690 3473 asection *sreloc;
37e55690
JJ		 3474
3475 outrel.r_offset = rel->r_offset
3476 + input_section->output_section->vma
3477 + input_section->output_offset;
3478 if (h != NULL && h->dynindx != -1)
3479 indx = h->dynindx;
3480 else
3481 indx = 0;
3482 if (r_type == R_386_TLS_LE_32)
3483 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3484 else
3485 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3486 sreloc = elf_section_data (input_section)->sreloc;
3487 if (sreloc == NULL)
3488 abort ();
59d6ffb2 3489 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 3490 if (indx)
3491 continue;
3492 else if (r_type == R_386_TLS_LE_32)
0afcef53 3493 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
37e55690 3494 else
0afcef53 3495 relocation -= _bfd_x86_elf_dtpoff_base (info);
37e55690
JJ		 3496 }
3497 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 3498 relocation = elf_i386_tpoff (info, relocation);
37e55690 3499 else
eb4ff4d6 3500 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3501 break;
3502
252b5132
RH		 3503 default:
3504 break;
3505 }
3506
239e1f3a
AM		 3507 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3508 because such sections are not SEC_ALLOC and thus ld.so will
3509 not process them. */
8c694914 3510 if (unresolved_reloc
239e1f3a 3511 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 3512 && h->def_dynamic)
3513 && _bfd_elf_section_offset (output_bfd, info, input_section,
3514 rel->r_offset) != (bfd_vma) -1)
6a30718d 3515 {
4eca0228 3516 _bfd_error_handler
695344c0 3517 /* xgettext:c-format */
d42c267e 3518 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3519 input_bfd,
3520 input_section,
d42c267e 3521 rel->r_offset,
843fe662 3522 howto->name,
6a30718d 3523 h->root.root.string);
b34976b6 3524 return FALSE;
6a30718d 3525 }
83be169b 3526
cbe950e9 3527do_relocation:
252b5132
RH		 3528 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3529 contents, rel->r_offset,
55fd94b0 3530 relocation, 0);
252b5132 3531
62d78908 3532check_relocation_error:
cf5c0c5b 3533 if (r != bfd_reloc_ok)
252b5132 3534 {
cf5c0c5b 3535 const char *name;
ffb2e45b 3536
cf5c0c5b
AM		 3537 if (h != NULL)
3538 name = h->root.root.string;
3539 else
3540 {
3541 name = bfd_elf_string_from_elf_section (input_bfd,
3542 symtab_hdr->sh_link,
3543 sym->st_name);
3544 if (name == NULL)
b34976b6 3545 return FALSE;
cf5c0c5b
AM		 3546 if (*name == '\0')
3547 name = bfd_section_name (input_bfd, sec);
3548 }
ffb2e45b 3549
cf5c0c5b 3550 if (r == bfd_reloc_overflow)
1a72702b
AM		 3551 (*info->callbacks->reloc_overflow)
3552 (info, (h ? &h->root : NULL), name, howto->name,
3553 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
cf5c0c5b
AM		 3554 else
3555 {
4eca0228 3556 _bfd_error_handler
695344c0 3557 /* xgettext:c-format */
d42c267e 3558 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
d003868e 3559 input_bfd, input_section,
d42c267e 3560 rel->r_offset, name, (int) r);
b34976b6 3561 return FALSE;
cf5c0c5b 3562 }
252b5132 3563 }
60f2e42e
L		 3564
3565 if (wrel != rel)
3566 *wrel = *rel;
3567 }
3568
3569 if (wrel != rel)
3570 {
3571 Elf_Internal_Shdr *rel_hdr;
3572 size_t deleted = rel - wrel;
3573
3574 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3575 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3576 if (rel_hdr->sh_size == 0)
3577 {
3578 /* It is too late to remove an empty reloc section. Leave
3579 one NONE reloc.
3580 ??? What is wrong with an empty section??? */
3581 rel_hdr->sh_size = rel_hdr->sh_entsize;
3582 deleted -= 1;
3583 }
3584 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3585 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3586 input_section->reloc_count -= deleted;
252b5132
RH		 3587 }
3588
b34976b6 3589 return TRUE;
252b5132
RH		 3590}
3591
3592/* Finish up dynamic symbol handling. We set the contents of various
3593 dynamic sections here. */
3594
b34976b6 3595static bfd_boolean
55fd94b0
AM		 3596elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3597 struct bfd_link_info *info,
3598 struct elf_link_hash_entry *h,
3599 Elf_Internal_Sym *sym)
252b5132 3600{
0afcef53 3601 struct elf_x86_link_hash_table *htab;
25e762b9 3602 unsigned plt_entry_size;
0afcef53 3603 struct elf_x86_link_hash_entry *eh;
aec6b87e 3604 bfd_boolean local_undefweak;
ee2fdd6f 3605 bfd_boolean use_plt_second;
252b5132 3606
0afcef53 3607 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 3608 if (htab == NULL)
3609 return FALSE;
252b5132 3610
765e526c 3611 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 3612
ee2fdd6f
L		 3613 /* Use the second PLT section only if there is .plt section. */
3614 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3615
0afcef53 3616 eh = (struct elf_x86_link_hash_entry *) h;
e133d005
L		 3617 if (eh->no_finish_dynamic_symbol)
3618 abort ();
dd7e64d4 3619
aec6b87e
L		 3620 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3621 resolved undefined weak symbols in executable so that their
3622 references have value 0 at run-time. */
c5bce5c6 3623 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
aec6b87e 3624
252b5132
RH		 3625 if (h->plt.offset != (bfd_vma) -1)
3626 {
ee2fdd6f 3627 bfd_vma plt_index, plt_offset;
252b5132 3628 bfd_vma got_offset;
947216bf
AM		 3629 Elf_Internal_Rela rel;
3630 bfd_byte *loc;
ee2fdd6f 3631 asection *plt, *resolved_plt, *gotplt, *relplt;
cbe950e9
L		 3632
3633 /* When building a static executable, use .iplt, .igot.plt and
3634 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 3635 if (htab->elf.splt != NULL)
cbe950e9 3636 {
6de2ae4a
L		 3637 plt = htab->elf.splt;
3638 gotplt = htab->elf.sgotplt;
3639 relplt = htab->elf.srelplt;
cbe950e9
L		 3640 }
3641 else
3642 {
6de2ae4a
L		 3643 plt = htab->elf.iplt;
3644 gotplt = htab->elf.igotplt;
3645 relplt = htab->elf.irelplt;
cbe950e9 3646 }
252b5132
RH		 3647
3648 /* This symbol has an entry in the procedure linkage table. Set
3649 it up. */
3650
cbe950e9 3651 if ((h->dynindx == -1
aec6b87e 3652 && !local_undefweak
0e1862bb 3653 && !((h->forced_local || bfd_link_executable (info))
cbe950e9
L		 3654 && h->def_regular
3655 && h->type == STT_GNU_IFUNC))
3656 || plt == NULL
3657 || gotplt == NULL
3658 || relplt == NULL)
cec7f46a 3659 abort ();
252b5132
RH		 3660
3661 /* Get the index in the procedure linkage table which
3662 corresponds to this symbol. This is the index of this symbol
3663 in all the symbols for which we are making plt entries. The
cbe950e9 3664 first entry in the procedure linkage table is reserved.
252b5132 3665
cbe950e9 3666 Get the offset into the .got table of the entry that
252b5132 3667 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 3668 The first three are reserved.
6bbec505 3669
cbe950e9
L		 3670 For static executables, we don't reserve anything. */
3671
6de2ae4a 3672 if (plt == htab->elf.splt)
cbe950e9 3673 {
f604c2a2 3674 got_offset = (h->plt.offset / plt_entry_size
765e526c 3675 - htab->plt.has_plt0);
e1f98742 3676 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 3677 }
3678 else
3679 {
e1f98742
L		 3680 got_offset = h->plt.offset / plt_entry_size;
3681 got_offset = got_offset * 4;
cbe950e9 3682 }
252b5132 3683
f604c2a2
L		 3684 /* Fill in the entry in the procedure linkage table and update
3685 the first slot. */
765e526c 3686 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
f604c2a2 3687 plt_entry_size);
ee2fdd6f
L		 3688
3689 if (use_plt_second)
3690 {
3691 const bfd_byte *plt_entry;
3692 if (bfd_link_pic (info))
765e526c 3693 plt_entry = htab->non_lazy_plt->pic_plt_entry;
ee2fdd6f 3694 else
765e526c 3695 plt_entry = htab->non_lazy_plt->plt_entry;
ee2fdd6f 3696 memcpy (htab->plt_second->contents + eh->plt_second.offset,
765e526c 3697 plt_entry, htab->non_lazy_plt->plt_entry_size);
ee2fdd6f
L		 3698
3699 resolved_plt = htab->plt_second;
3700 plt_offset = eh->plt_second.offset;
3701 }
3702 else
3703 {
3704 resolved_plt = plt;
3705 plt_offset = h->plt.offset;
3706 }
3707
0e1862bb 3708 if (! bfd_link_pic (info))
252b5132 3709 {
252b5132 3710 bfd_put_32 (output_bfd,
cbe950e9
L		 3711 (gotplt->output_section->vma
3712 + gotplt->output_offset
252b5132 3713 + got_offset),
ee2fdd6f 3714 resolved_plt->contents + plt_offset
765e526c 3715 + htab->plt.plt_got_offset);
eac338cf 3716
9a742a90 3717 if (htab->is_vxworks)
eac338cf
PB		 3718 {
3719 int s, k, reloc_index;
3720
3721 /* Create the R_386_32 relocation referencing the GOT
3722 for this PLT entry. */
3723
3724 /* S: Current slot number (zero-based). */
765e526c
L		 3725 s = ((h->plt.offset - htab->plt.plt_entry_size)
3726 / htab->plt.plt_entry_size);
eac338cf 3727 /* K: Number of relocations for PLTResolve. */
0e1862bb 3728 if (bfd_link_pic (info))
eac338cf
PB		 3729 k = PLTRESOLVE_RELOCS_SHLIB;
3730 else
3731 k = PLTRESOLVE_RELOCS;
3732 /* Skip the PLTresolve relocations, and the relocations for
3733 the other PLT slots. */
3734 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
765e526c 3735 loc = (htab->srelplt2->contents + reloc_index
eac338cf
PB		 3736 * sizeof (Elf32_External_Rel));
3737
ee2fdd6f
L		 3738 rel.r_offset = (plt->output_section->vma
3739 + plt->output_offset
eac338cf 3740 + h->plt.offset + 2),
7325306f 3741 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3742 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3743
3744 /* Create the R_386_32 relocation referencing the beginning of
3745 the PLT for this GOT entry. */
6de2ae4a
L		 3746 rel.r_offset = (htab->elf.sgotplt->output_section->vma
3747 + htab->elf.sgotplt->output_offset
eac338cf 3748 + got_offset);
7325306f 3749 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 3750 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 3751 loc + sizeof (Elf32_External_Rel));
eac338cf 3752 }
252b5132
RH		 3753 }
3754 else
3755 {
252b5132 3756 bfd_put_32 (output_bfd, got_offset,
ee2fdd6f 3757 resolved_plt->contents + plt_offset
765e526c 3758 + htab->plt.plt_got_offset);
252b5132
RH		 3759 }
3760
aec6b87e
L		 3761 /* Fill in the entry in the global offset table. Leave the entry
3762 as zero for undefined weak symbol in PIE. No PLT relocation
3763 against undefined weak symbol in PIE. */
3764 if (!local_undefweak)
cbe950e9 3765 {
765e526c 3766 if (htab->plt.has_plt0)
f604c2a2
L		 3767 bfd_put_32 (output_bfd,
3768 (plt->output_section->vma
3769 + plt->output_offset
3770 + h->plt.offset
765e526c 3771 + htab->lazy_plt->plt_lazy_offset),
f604c2a2 3772 gotplt->contents + got_offset);
252b5132 3773
aec6b87e
L		 3774 /* Fill in the entry in the .rel.plt section. */
3775 rel.r_offset = (gotplt->output_section->vma
3776 + gotplt->output_offset
3777 + got_offset);
3778 if (h->dynindx == -1
3779 || ((bfd_link_executable (info)
3780 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3781 && h->def_regular
3782 && h->type == STT_GNU_IFUNC))
3783 {
6322e5c5
L		 3784 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3785 h->root.root.string,
3786 h->root.u.def.section->owner);
3787
aec6b87e
L		 3788 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3789 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3790 in the .got.plt section. */
3791 bfd_put_32 (output_bfd,
3792 (h->root.u.def.value
3793 + h->root.u.def.section->output_section->vma
3794 + h->root.u.def.section->output_offset),
3795 gotplt->contents + got_offset);
3796 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3797 /* R_386_IRELATIVE comes last. */
3798 plt_index = htab->next_irelative_index--;
3799 }
3800 else
3801 {
3802 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3803 plt_index = htab->next_jump_slot_index++;
3804 }
3805
3806 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3807 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3808
f604c2a2
L		 3809 /* Don't fill the second and third slots in PLT entry for
3810 static executables nor without PLT0. */
765e526c 3811 if (plt == htab->elf.splt && htab->plt.has_plt0)
aec6b87e
L		 3812 {
3813 bfd_put_32 (output_bfd,
3814 plt_index * sizeof (Elf32_External_Rel),
3815 plt->contents + h->plt.offset
765e526c 3816 + htab->lazy_plt->plt_reloc_offset);
f604c2a2
L		 3817 bfd_put_32 (output_bfd,
3818 - (h->plt.offset
765e526c 3819 + htab->lazy_plt->plt_plt_offset + 4),
f604c2a2 3820 (plt->contents + h->plt.offset
765e526c 3821 + htab->lazy_plt->plt_plt_offset));
aec6b87e 3822 }
e1f98742 3823 }
dd7e64d4
L		 3824 }
3825 else if (eh->plt_got.offset != (bfd_vma) -1)
3826 {
3827 bfd_vma got_offset, plt_offset;
3828 asection *plt, *got, *gotplt;
3829 const bfd_byte *got_plt_entry;
3830
dd7e64d4
L		 3831 /* Set the entry in the GOT procedure linkage table. */
3832 plt = htab->plt_got;
3833 got = htab->elf.sgot;
3834 gotplt = htab->elf.sgotplt;
3835 got_offset = h->got.offset;
3836
3837 if (got_offset == (bfd_vma) -1
3838 || plt == NULL
3839 || got == NULL
3840 || gotplt == NULL)
3841 abort ();
3842
3843 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 3844 if (! bfd_link_pic (info))
252b5132 3845 {
765e526c 3846 got_plt_entry = htab->non_lazy_plt->plt_entry;
dd7e64d4 3847 got_offset += got->output_section->vma + got->output_offset;
252b5132 3848 }
dd7e64d4
L		 3849 else
3850 {
765e526c 3851 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
dd7e64d4
L		 3852 got_offset += (got->output_section->vma
3853 + got->output_offset
3854 - gotplt->output_section->vma
3855 - gotplt->output_offset);
3856 }
3857
3858 plt_offset = eh->plt_got.offset;
3859 memcpy (plt->contents + plt_offset, got_plt_entry,
765e526c 3860 htab->non_lazy_plt->plt_entry_size);
dd7e64d4 3861 bfd_put_32 (output_bfd, got_offset,
f604c2a2 3862 (plt->contents + plt_offset
765e526c 3863 + htab->non_lazy_plt->plt_got_offset));
dd7e64d4
L		 3864 }
3865
aec6b87e
L		 3866 if (!local_undefweak
3867 && !h->def_regular
dd7e64d4
L		 3868 && (h->plt.offset != (bfd_vma) -1
3869 || eh->plt_got.offset != (bfd_vma) -1))
3870 {
3871 /* Mark the symbol as undefined, rather than as defined in
3872 the .plt section. Leave the value if there were any
3873 relocations where pointer equality matters (this is a clue
3874 for the dynamic linker, to make function pointer
3875 comparisons work between an application and shared
3876 library), otherwise set it to zero. If a function is only
3877 called from a binary, there is no need to slow down
3878 shared libraries because of that. */
3879 sym->st_shndx = SHN_UNDEF;
3880 if (!h->pointer_equality_needed)
3881 sym->st_value = 0;
252b5132
RH		 3882 }
3883
aec6b87e
L		 3884 /* Don't generate dynamic GOT relocation against undefined weak
3885 symbol in executable. */
13ae64f3 3886 if (h->got.offset != (bfd_vma) -1
0afcef53
L		 3887 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3888 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
aec6b87e 3889 && !local_undefweak)
252b5132 3890 {
947216bf 3891 Elf_Internal_Rela rel;
233cc9c1 3892 asection *relgot = htab->elf.srelgot;
252b5132
RH		 3893
3894 /* This symbol has an entry in the global offset table. Set it
3895 up. */
3896
6de2ae4a 3897 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 3898 abort ();
252b5132 3899
6de2ae4a
L		 3900 rel.r_offset = (htab->elf.sgot->output_section->vma
3901 + htab->elf.sgot->output_offset
dc810e39 3902 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3903
dd5724d5
AM		 3904 /* If this is a static link, or it is a -Bsymbolic link and the
3905 symbol is defined locally or was forced to be local because
3906 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3907 The entry in the global offset table will already have been
3908 initialized in the relocate_section function. */
710ab287 3909 if (h->def_regular
0018b0a3
L		 3910 && h->type == STT_GNU_IFUNC)
3911 {
233cc9c1
L		 3912 if (h->plt.offset == (bfd_vma) -1)
3913 {
3914 /* STT_GNU_IFUNC is referenced without PLT. */
3915 if (htab->elf.splt == NULL)
3916 {
3917 /* use .rel[a].iplt section to store .got relocations
3918 in static executable. */
3919 relgot = htab->elf.irelplt;
3920 }
6999821f 3921 if (SYMBOL_REFERENCES_LOCAL_P (info, h))
233cc9c1 3922 {
6322e5c5
L		 3923 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3924 h->root.root.string,
3925 h->root.u.def.section->owner);
3926
233cc9c1
L		 3927 bfd_put_32 (output_bfd,
3928 (h->root.u.def.value
3929 + h->root.u.def.section->output_section->vma
3930 + h->root.u.def.section->output_offset),
3931 htab->elf.sgot->contents + h->got.offset);
3932 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3933 }
3934 else
3935 goto do_glob_dat;
3936 }
3937 else if (bfd_link_pic (info))
710ab287
L		 3938 {
3939 /* Generate R_386_GLOB_DAT. */
3940 goto do_glob_dat;
3941 }
3942 else
3943 {
cd2b2c10 3944 asection *plt;
ee2fdd6f 3945 bfd_vma plt_offset;
cd2b2c10 3946
710ab287
L		 3947 if (!h->pointer_equality_needed)
3948 abort ();
3949
3950 /* For non-shared object, we can't use .got.plt, which
3951 contains the real function addres if we need pointer
3952 equality. We load the GOT entry with the PLT entry. */
ee2fdd6f
L		 3953 if (htab->plt_second != NULL)
3954 {
3955 plt = htab->plt_second;
3956 plt_offset = eh->plt_second.offset;
3957 }
3958 else
3959 {
3960 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3961 plt_offset = h->plt.offset;
3962 }
710ab287
L		 3963 bfd_put_32 (output_bfd,
3964 (plt->output_section->vma
ee2fdd6f 3965 + plt->output_offset + plt_offset),
6de2ae4a 3966 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 3967 return TRUE;
3968 }
0018b0a3 3969 }
0e1862bb 3970 else if (bfd_link_pic (info)
6999821f 3971 && SYMBOL_REFERENCES_LOCAL_P (info, h))
dd5724d5 3972 {
6725bdbf 3973 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3974 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3975 }
252b5132
RH		 3976 else
3977 {
dd5724d5 3978 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 3979do_glob_dat:
6725bdbf 3980 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 3981 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 3982 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3983 }
3984
233cc9c1 3985 elf_append_rel (output_bfd, relgot, &rel);
252b5132
RH		 3986 }
3987
f5385ebf 3988 if (h->needs_copy)
252b5132 3989 {
947216bf 3990 Elf_Internal_Rela rel;
5474d94f 3991 asection *s;
252b5132
RH		 3992
3993 /* This symbol needs a copy reloc. Set it up. */
3994
ffb2e45b
AM		 3995 if (h->dynindx == -1
3996 || (h->root.type != bfd_link_hash_defined
3997 && h->root.type != bfd_link_hash_defweak)
5474d94f
AM		 3998 || htab->elf.srelbss == NULL
3999 || htab->elf.sreldynrelro == NULL)
ffb2e45b 4000 abort ();
252b5132
RH		 4001
4002 rel.r_offset = (h->root.u.def.value
4003 + h->root.u.def.section->output_section->vma
4004 + h->root.u.def.section->output_offset);
4005 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
afbf7e8e 4006 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 4007 s = htab->elf.sreldynrelro;
4008 else
4009 s = htab->elf.srelbss;
4010 elf_append_rel (output_bfd, s, &rel);
252b5132
RH		 4011 }
4012
b34976b6 4013 return TRUE;
252b5132
RH		 4014}
4015
c25bc9fc
L		 4016/* Finish up local dynamic symbol handling. We set the contents of
4017 various dynamic sections here. */
4018
4019static bfd_boolean
4020elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4021{
4022 struct elf_link_hash_entry *h
4023 = (struct elf_link_hash_entry *) *slot;
4024 struct bfd_link_info *info
23209a78 4025 = (struct bfd_link_info *) inf;
c25bc9fc
L		 4026
4027 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4028 h, NULL);
4029}
4030
aec6b87e
L		 4031/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4032 here since undefined weak symbol may not be dynamic and may not be
4033 called for elf_i386_finish_dynamic_symbol. */
4034
4035static bfd_boolean
4036elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
4037 void *inf)
4038{
4039 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
4040 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4041
4042 if (h->root.type != bfd_link_hash_undefweak
4043 || h->dynindx != -1)
4044 return TRUE;
4045
4046 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5f0f0847 4047 info, h, NULL);
aec6b87e
L		 4048}
4049
38701953
AM		 4050/* Used to decide how to sort relocs in an optimal manner for the
4051 dynamic linker, before writing them out. */
4052
4053static enum elf_reloc_type_class
cae1fbbb 4054elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 4055 const asection *rel_sec ATTRIBUTE_UNUSED,
4056 const Elf_Internal_Rela *rela)
38701953 4057{
cae1fbbb
L		 4058 bfd *abfd = info->output_bfd;
4059 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4060 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 4061
d9e3b590
L		 4062 if (htab->dynsym != NULL
4063 && htab->dynsym->contents != NULL)
4064 {
4065 /* Check relocation against STT_GNU_IFUNC symbol if there are
4066 dynamic symbols. */
4067 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
c428ce9d
L		 4068 if (r_symndx != STN_UNDEF)
4069 {
4070 Elf_Internal_Sym sym;
4071 if (!bed->s->swap_symbol_in (abfd,
4072 (htab->dynsym->contents
4073 + r_symndx * sizeof (Elf32_External_Sym)),
4074 0, &sym))
4075 abort ();
d9e3b590 4076
c428ce9d
L		 4077 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
4078 return reloc_class_ifunc;
4079 }
d9e3b590 4080 }
cae1fbbb 4081
55fd94b0 4082 switch (ELF32_R_TYPE (rela->r_info))
38701953 4083 {
c428ce9d
L		 4084 case R_386_IRELATIVE:
4085 return reloc_class_ifunc;
38701953
AM		 4086 case R_386_RELATIVE:
4087 return reloc_class_relative;
4088 case R_386_JUMP_SLOT:
4089 return reloc_class_plt;
4090 case R_386_COPY:
4091 return reloc_class_copy;
4092 default:
4093 return reloc_class_normal;
4094 }
4095}
4096
252b5132
RH		 4097/* Finish up the dynamic sections. */
4098
b34976b6 4099static bfd_boolean
55fd94b0
AM		 4100elf_i386_finish_dynamic_sections (bfd *output_bfd,
4101 struct bfd_link_info *info)
252b5132 4102{
0afcef53 4103 struct elf_x86_link_hash_table *htab;
252b5132 4104 bfd *dynobj;
252b5132 4105 asection *sdyn;
25e762b9 4106 const struct elf_i386_backend_data *abed;
252b5132 4107
0afcef53 4108 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 4109 if (htab == NULL)
4110 return FALSE;
4111
ebe50bae 4112 dynobj = htab->elf.dynobj;
3d4d4302 4113 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
25e762b9 4114 abed = get_elf_i386_backend_data (output_bfd);
252b5132 4115
ebe50bae 4116 if (htab->elf.dynamic_sections_created)
252b5132 4117 {
252b5132
RH		 4118 Elf32_External_Dyn *dyncon, *dynconend;
4119
6de2ae4a 4120 if (sdyn == NULL || htab->elf.sgot == NULL)
ffb2e45b 4121 abort ();
252b5132
RH		 4122
4123 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 4124 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 4125 for (; dyncon < dynconend; dyncon++)
4126 {
4127 Elf_Internal_Dyn dyn;
51b64d56 4128 asection *s;
252b5132
RH		 4129
4130 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4131
4132 switch (dyn.d_tag)
4133 {
4134 default:
9a742a90 4135 if (htab->is_vxworks
25e762b9 4136 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7a2b07ff 4137 break;
0ac8d2ca 4138 continue;
252b5132
RH		 4139
4140 case DT_PLTGOT:
6de2ae4a 4141 s = htab->elf.sgotplt;
8c37241b 4142 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 4143 break;
4144
252b5132 4145 case DT_JMPREL:
6de2ae4a 4146 s = htab->elf.srelplt;
6348e046 4147 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 4148 break;
4149
4150 case DT_PLTRELSZ:
6de2ae4a 4151 s = htab->elf.srelplt;
eea6121a 4152 dyn.d_un.d_val = s->size;
252b5132 4153 break;
252b5132 4154 }
0ac8d2ca
AM		 4155
4156 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 4157 }
4158
6de2ae4a 4159 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 4160 {
1f78f649
L		 4161 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4162 really seem like the right value. */
4163 elf_section_data (htab->elf.splt->output_section)
4164 ->this_hdr.sh_entsize = 4;
4165
765e526c 4166 if (htab->plt.has_plt0)
252b5132 4167 {
f604c2a2
L		 4168 /* Fill in the special first entry in the procedure linkage
4169 table. */
765e526c
L		 4170 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
4171 htab->lazy_plt->plt0_entry_size);
4172 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
25e762b9 4173 abed->plt0_pad_byte,
765e526c 4174 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
f604c2a2 4175 if (!bfd_link_pic (info))
eac338cf 4176 {
f604c2a2
L		 4177 bfd_put_32 (output_bfd,
4178 (htab->elf.sgotplt->output_section->vma
4179 + htab->elf.sgotplt->output_offset
4180 + 4),
4181 htab->elf.splt->contents
765e526c 4182 + htab->lazy_plt->plt0_got1_offset);
f604c2a2
L		 4183 bfd_put_32 (output_bfd,
4184 (htab->elf.sgotplt->output_section->vma
4185 + htab->elf.sgotplt->output_offset
4186 + 8),
4187 htab->elf.splt->contents
765e526c 4188 + htab->lazy_plt->plt0_got2_offset);
eac338cf 4189
9a742a90 4190 if (htab->is_vxworks)
1f78f649 4191 {
f604c2a2
L		 4192 Elf_Internal_Rela rel;
4193 int num_plts = (htab->elf.splt->size
765e526c 4194 / htab->plt.plt_entry_size) - 1;
f604c2a2 4195 unsigned char *p;
765e526c 4196 asection *srelplt2 = htab->srelplt2;
f604c2a2
L		 4197
4198 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4199 + 4. On IA32 we use REL relocations so the
4200 addend goes in the PLT directly. */
4201 rel.r_offset = (htab->elf.splt->output_section->vma
4202 + htab->elf.splt->output_offset
765e526c 4203 + htab->lazy_plt->plt0_got1_offset);
1f78f649
L		 4204 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4205 R_386_32);
f604c2a2 4206 bfd_elf32_swap_reloc_out (output_bfd, &rel,
0afcef53 4207 srelplt2->contents);
f604c2a2
L		 4208 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4209 + 8. */
4210 rel.r_offset = (htab->elf.splt->output_section->vma
4211 + htab->elf.splt->output_offset
765e526c 4212 + htab->lazy_plt->plt0_got2_offset);
f604c2a2 4213 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
1f78f649 4214 R_386_32);
f604c2a2 4215 bfd_elf32_swap_reloc_out (output_bfd, &rel,
0afcef53 4216 srelplt2->contents +
f604c2a2
L		 4217 sizeof (Elf32_External_Rel));
4218 /* Correct the .rel.plt.unloaded relocations. */
0afcef53 4219 p = srelplt2->contents;
f604c2a2
L		 4220 if (bfd_link_pic (info))
4221 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4222 else
4223 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4224
4225 for (; num_plts; num_plts--)
4226 {
4227 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4228 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4229 R_386_32);
4230 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4231 p += sizeof (Elf32_External_Rel);
4232
4233 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4234 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4235 R_386_32);
4236 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4237 p += sizeof (Elf32_External_Rel);
4238 }
1f78f649 4239 }
eac338cf
PB		 4240 }
4241 }
252b5132 4242 }
f604c2a2
L		 4243
4244 if (htab->plt_got != NULL && htab->plt_got->size > 0)
4245 elf_section_data (htab->plt_got->output_section)
765e526c 4246 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
ee2fdd6f
L		 4247
4248 if (htab->plt_second != NULL && htab->plt_second->size > 0)
4249 elf_section_data (htab->plt_second->output_section)
765e526c 4250 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
252b5132
RH		 4251 }
4252
f604c2a2
L		 4253 /* Fill in the first three entries in the global offset table. */
4254 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
252b5132 4255 {
56d4289c
L		 4256 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4257 {
4eca0228 4258 _bfd_error_handler
56d4289c
L		 4259 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4260 return FALSE;
4261 }
4262
f604c2a2
L		 4263 bfd_put_32 (output_bfd,
4264 (sdyn == NULL ? 0
4265 : sdyn->output_section->vma + sdyn->output_offset),
4266 htab->elf.sgotplt->contents);
4267 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4268 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
252b5132 4269
6de2ae4a 4270 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
12d0ee4a 4271 }
8c37241b 4272
e41b3a13 4273 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 4274 if (htab->plt_eh_frame != NULL
4275 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 4276 {
4277 if (htab->elf.splt != NULL
4278 && htab->elf.splt->size != 0
4279 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4280 && htab->elf.splt->output_section != NULL
4281 && htab->plt_eh_frame->output_section != NULL)
4282 {
4283 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4284 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4285 + htab->plt_eh_frame->output_offset
4286 + PLT_FDE_START_OFFSET;
4287 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4288 htab->plt_eh_frame->contents
4289 + PLT_FDE_START_OFFSET);
4290 }
4291 if (htab->plt_eh_frame->sec_info_type
dbaa2011 4292 == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 4293 {
4294 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4295 htab->plt_eh_frame,
4296 htab->plt_eh_frame->contents))
4297 return FALSE;
4298 }
4299 }
4300
fff53dae
L		 4301 /* Adjust .eh_frame for .plt.got section. */
4302 if (htab->plt_got_eh_frame != NULL
4303 && htab->plt_got_eh_frame->contents != NULL)
4304 {
4305 if (htab->plt_got != NULL
4306 && htab->plt_got->size != 0
4307 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
4308 && htab->plt_got->output_section != NULL
4309 && htab->plt_got_eh_frame->output_section != NULL)
4310 {
4311 bfd_vma plt_start = htab->plt_got->output_section->vma;
4312 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
4313 + htab->plt_got_eh_frame->output_offset
4314 + PLT_FDE_START_OFFSET;
4315 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4316 htab->plt_got_eh_frame->contents
4317 + PLT_FDE_START_OFFSET);
4318 }
4319 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4320 {
4321 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4322 htab->plt_got_eh_frame,
4323 htab->plt_got_eh_frame->contents))
4324 return FALSE;
4325 }
4326 }
4327
ee2fdd6f
L		 4328 /* Adjust .eh_frame for the second PLT section. */
4329 if (htab->plt_second_eh_frame != NULL
4330 && htab->plt_second_eh_frame->contents != NULL)
4331 {
4332 if (htab->plt_second != NULL
4333 && htab->plt_second->size != 0
4334 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
4335 && htab->plt_second->output_section != NULL
4336 && htab->plt_second_eh_frame->output_section != NULL)
4337 {
4338 bfd_vma plt_start = htab->plt_second->output_section->vma;
4339 bfd_vma eh_frame_start
4340 = (htab->plt_second_eh_frame->output_section->vma
4341 + htab->plt_second_eh_frame->output_offset
4342 + PLT_FDE_START_OFFSET);
4343 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4344 htab->plt_second_eh_frame->contents
4345 + PLT_FDE_START_OFFSET);
4346 }
4347 if (htab->plt_second_eh_frame->sec_info_type
4348 == SEC_INFO_TYPE_EH_FRAME)
4349 {
4350 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4351 htab->plt_second_eh_frame,
4352 htab->plt_second_eh_frame->contents))
4353 return FALSE;
4354 }
4355 }
4356
6de2ae4a
L		 4357 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4358 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
8c37241b 4359
aec6b87e
L		 4360 /* Fill PLT entries for undefined weak symbols in PIE. */
4361 if (bfd_link_pie (info))
4362 bfd_hash_traverse (&info->hash->table,
4363 elf_i386_pie_finish_undefweak_symbol,
4364 info);
4365
b34976b6 4366 return TRUE;
252b5132
RH		 4367}
4368
233cc9c1
L		 4369/* Fill PLT/GOT entries and allocate dynamic relocations for local
4370 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4371 It has to be done before elf_link_sort_relocs is called so that
4372 dynamic relocations are properly sorted. */
4373
4374static bfd_boolean
4375elf_i386_output_arch_local_syms
4376 (bfd *output_bfd ATTRIBUTE_UNUSED,
4377 struct bfd_link_info *info,
4378 void *flaginfo ATTRIBUTE_UNUSED,
4379 int (*func) (void *, const char *,
4380 Elf_Internal_Sym *,
4381 asection *,
4382 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4383{
0afcef53
L		 4384 struct elf_x86_link_hash_table *htab
4385 = elf_x86_hash_table (info, I386_ELF_DATA);
233cc9c1
L		 4386 if (htab == NULL)
4387 return FALSE;
4388
4389 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4390 htab_traverse (htab->loc_hash_table,
4391 elf_i386_finish_local_dynamic_symbol,
4392 info);
4393
4394 return TRUE;
4395}
4396
f604c2a2 4397/* Forward declaration. */
765e526c 4398static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
f604c2a2
L		 4399
4400/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4401 dynamic relocations. */
4402
4403static long
4404elf_i386_get_synthetic_symtab (bfd *abfd,
4405 long symcount ATTRIBUTE_UNUSED,
4406 asymbol **syms ATTRIBUTE_UNUSED,
4407 long dynsymcount,
4408 asymbol **dynsyms,
4409 asymbol **ret)
4410{
f493882d 4411 long count, i, n;
f604c2a2 4412 int j;
f604c2a2 4413 bfd_byte *plt_contents;
f493882d 4414 long relsize;
765e526c
L		 4415 const struct elf_x86_lazy_plt_layout *lazy_plt;
4416 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4417 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4418 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
f604c2a2
L		 4419 asection *plt;
4420 bfd_vma got_addr;
f493882d
L		 4421 enum elf_x86_plt_type plt_type;
4422 struct elf_x86_plt plts[] =
3972882e 4423 {
f493882d
L		 4424 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4425 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4426 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4427 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
f604c2a2 4428 };
144bed8d 4429
f604c2a2 4430 *ret = NULL;
144bed8d 4431
f604c2a2
L		 4432 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4433 return 0;
3972882e 4434
f604c2a2
L		 4435 if (dynsymcount <= 0)
4436 return 0;
cca5b8b6 4437
f604c2a2
L		 4438 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4439 if (relsize <= 0)
4440 return -1;
cca5b8b6 4441
f604c2a2
L		 4442 non_lazy_plt = NULL;
4443 /* Silence GCC 6. */
4444 lazy_plt = NULL;
ee2fdd6f
L		 4445 non_lazy_ibt_plt = NULL;
4446 lazy_ibt_plt = NULL;
f604c2a2 4447 switch (get_elf_i386_backend_data (abfd)->os)
144bed8d 4448 {
f604c2a2
L		 4449 case is_normal:
4450 non_lazy_plt = &elf_i386_non_lazy_plt;
ee2fdd6f
L		 4451 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4452 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4453 /* Fall through */
4454 case is_vxworks:
4455 lazy_plt = &elf_i386_lazy_plt;
4456 break;
4457 case is_nacl:
4458 lazy_plt = &elf_i386_nacl_plt;
4459 break;
4460 }
4461
4462 got_addr = 0;
3972882e 4463
f604c2a2
L		 4464 count = 0;
4465 for (j = 0; plts[j].name != NULL; j++)
4466 {
4467 plt = bfd_get_section_by_name (abfd, plts[j].name);
90efb642 4468 if (plt == NULL || plt->size == 0)
6f25f223 4469 continue;
533d0af0 4470
f604c2a2
L		 4471 /* Get the PLT section contents. */
4472 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4473 if (plt_contents == NULL)
4474 break;
4475 if (!bfd_get_section_contents (abfd, (asection *) plt,
4476 plt_contents, 0, plt->size))
4477 {
4478 free (plt_contents);
4479 break;
4480 }
4481
4482 /* Check what kind of PLT it is. */
4483 plt_type = plt_unknown;
90efb642
L		 4484 if (plts[j].type == plt_unknown
4485 && (plt->size >= (lazy_plt->plt0_entry_size
4486 + lazy_plt->plt_entry_size)))
f604c2a2
L		 4487 {
4488 /* Match lazy PLT first. */
4489 if (memcmp (plt_contents, lazy_plt->plt0_entry,
4490 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4491 {
4492 /* The fist entry in the lazy IBT PLT is the same as the
4493 normal lazy PLT. */
4494 if (lazy_ibt_plt != NULL
90efb642 4495 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4496 lazy_ibt_plt->plt_entry,
4497 lazy_ibt_plt->plt_got_offset) == 0))
4498 plt_type = plt_lazy | plt_second;
4499 else
4500 plt_type = plt_lazy;
4501 }
f604c2a2
L		 4502 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4503 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4504 {
4505 /* The fist entry in the PIC lazy IBT PLT is the same as
4506 the normal PIC lazy PLT. */
4507 if (lazy_ibt_plt != NULL
90efb642 4508 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4509 lazy_ibt_plt->pic_plt_entry,
4510 lazy_ibt_plt->plt_got_offset) == 0))
4511 plt_type = plt_lazy | plt_pic | plt_second;
4512 else
4513 plt_type = plt_lazy | plt_pic;
4514 }
f604c2a2
L		 4515 }
4516
4517 if (non_lazy_plt != NULL
90efb642
L		 4518 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4519 && plt->size >= non_lazy_plt->plt_entry_size)
f604c2a2
L		 4520 {
4521 /* Match non-lazy PLT. */
4522 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4523 non_lazy_plt->plt_got_offset) == 0)
4524 plt_type = plt_non_lazy;
4525 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4526 non_lazy_plt->plt_got_offset) == 0)
4527 plt_type = plt_pic;
4528 }
4529
ee2fdd6f 4530 if ((non_lazy_ibt_plt != NULL)
90efb642
L		 4531 && (plt_type == plt_unknown || plt_type == plt_second)
4532 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
ee2fdd6f
L		 4533 {
4534 if (memcmp (plt_contents,
4535 non_lazy_ibt_plt->plt_entry,
4536 non_lazy_ibt_plt->plt_got_offset) == 0)
4537 {
4538 /* Match IBT PLT. */
4539 plt_type = plt_second;
4540 non_lazy_plt = non_lazy_ibt_plt;
4541 }
4542 else if (memcmp (plt_contents,
4543 non_lazy_ibt_plt->pic_plt_entry,
4544 non_lazy_ibt_plt->plt_got_offset) == 0)
4545 {
4546 /* Match PIC IBT PLT. */
4547 plt_type = plt_second | plt_pic;
4548 non_lazy_plt = non_lazy_ibt_plt;
4549 }
4550 }
4551
f604c2a2 4552 if (plt_type == plt_unknown)
37c0b6ee
L		 4553 {
4554 free (plt_contents);
4555 continue;
4556 }
3972882e 4557
f604c2a2
L		 4558 plts[j].sec = plt;
4559 plts[j].type = plt_type;
ec1f73bb 4560
f604c2a2
L		 4561 if ((plt_type & plt_lazy))
4562 {
4563 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4564 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4565 /* Skip PLT0 in lazy PLT. */
4566 i = 1;
4567 }
4568 else
4569 {
4570 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4571 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4572 i = 0;
4573 }
fca6ae69 4574
ee2fdd6f
L		 4575 /* Skip lazy PLT when the second PLT is used. */
4576 if ((plt_type & (plt_lazy | plt_second))
4577 == (plt_lazy | plt_second))
4578 plts[j].count = 0;
4579 else
4580 {
4581 n = plt->size / plts[j].plt_entry_size;
4582 plts[j].count = n;
4583 count += n - i;
4584 }
f604c2a2
L		 4585
4586 plts[j].contents = plt_contents;
4587
4588 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4589 if ((plt_type & plt_pic))
4590 got_addr = (bfd_vma) -1;
144bed8d
L		 4591 }
4592
f493882d
L		 4593 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4594 got_addr, plts, dynsyms,
4595 ret);
4c45e5c9
JJ		 4596}
4597
f604c2a2
L		 4598/* Set up i386 GNU properties. Return the first relocatable ELF input
4599 with GNU properties if found. Otherwise, return NULL. */
4600
4601static bfd *
4602elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4603{
1de031c8 4604 struct elf_x86_init_table init_table;
f604c2a2 4605
1de031c8
L		 4606 init_table.normal_target = FALSE;
4607 init_table.is_vxworks = FALSE;
f604c2a2
L		 4608 switch (get_elf_i386_backend_data (info->output_bfd)->os)
4609 {
4610 case is_normal:
1de031c8
L		 4611 init_table.lazy_plt = &elf_i386_lazy_plt;
4612 init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4613 init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4614 init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4615 init_table.normal_target = TRUE;
f604c2a2
L		 4616 break;
4617 case is_vxworks:
1de031c8
L		 4618 init_table.lazy_plt = &elf_i386_lazy_plt;
4619 init_table.non_lazy_plt = NULL;
4620 init_table.lazy_ibt_plt = NULL;
4621 init_table.non_lazy_ibt_plt = NULL;
4622 init_table.is_vxworks = TRUE;
f604c2a2
L		 4623 break;
4624 case is_nacl:
1de031c8
L		 4625 init_table.lazy_plt = &elf_i386_nacl_plt;
4626 init_table.non_lazy_plt = NULL;
4627 init_table.lazy_ibt_plt = NULL;
4628 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4629 break;
4630 }
4631
1de031c8
L		 4632 init_table.r_info = elf32_r_info;
4633 init_table.r_sym = elf32_r_sym;
7a382c1c 4634
1de031c8 4635 return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
f604c2a2
L		 4636}
4637
6d00b590 4638#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 4639#define TARGET_LITTLE_NAME "elf32-i386"
4640#define ELF_ARCH bfd_arch_i386
ae95ffa6 4641#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 4642#define ELF_MACHINE_CODE EM_386
4643#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 4644
4645#define elf_backend_can_gc_sections 1
51b64d56 4646#define elf_backend_can_refcount 1
252b5132
RH		 4647#define elf_backend_want_got_plt 1
4648#define elf_backend_plt_readonly 1
4649#define elf_backend_want_plt_sym 0
4650#define elf_backend_got_header_size 12
e41b3a13 4651#define elf_backend_plt_alignment 4
64f52338 4652#define elf_backend_dtrel_excludes_plt 1
f7483970 4653#define elf_backend_extern_protected_data 1
bedfd056 4654#define elf_backend_caches_rawsize 1
5474d94f 4655#define elf_backend_want_dynrelro 1
252b5132 4656
8c29f035
AM		 4657/* Support RELA for objdump of prelink objects. */
4658#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 4659#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4660
dd5724d5 4661#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
dd5724d5 4662#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 4663#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 4664#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5 4665
13285a1b 4666#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 4667#define elf_backend_check_relocs elf_i386_check_relocs
f604c2a2 4668#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
0ac8d2ca 4669#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 4670#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4671#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
233cc9c1 4672#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
c5fccbec
DJ		 4673#define elf_backend_grok_prstatus elf_i386_grok_prstatus
4674#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 4675#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca 4676#define elf_backend_relocate_section elf_i386_relocate_section
f604c2a2 4677#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
dd5724d5 4678
252b5132 4679#include "elf32-target.h"
2bc3c89a
AM		 4680
4681/* FreeBSD support. */
4682
4683#undef TARGET_LITTLE_SYM
6d00b590 4684#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 4685#undef TARGET_LITTLE_NAME
4686#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 4687#undef ELF_OSABI
4688#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 4689
4690/* The kernel recognizes executables as valid only if they carry a
4691 "FreeBSD" label in the ELF header. So we put this label on all
4692 executables and (for simplicity) also all other object files. */
4693
2bc3c89a 4694static void
d8045f23 4695elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 4696{
78245035 4697 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 4698
2bc3c89a 4699#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 4700 {
4701 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4702 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4703 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4704 }
caf47ea6 4705#endif
2bc3c89a
AM		 4706}
4707
4708#undef elf_backend_post_process_headers
d8045f23 4709#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 4710#undef elf32_bed
4711#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 4712
d8045f23
NC		 4713#undef elf_backend_add_symbol_hook
4714
2bc3c89a 4715#include "elf32-target.h"
eac338cf 4716
a6cc6b3b
RO		 4717/* Solaris 2. */
4718
4719#undef TARGET_LITTLE_SYM
6d00b590 4720#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 4721#undef TARGET_LITTLE_NAME
4722#define TARGET_LITTLE_NAME "elf32-i386-sol2"
4723
914082d1
L		 4724#undef elf_backend_post_process_headers
4725
a6cc6b3b
RO		 4726/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4727 objects won't be recognized. */
4728#undef ELF_OSABI
4729
4730#undef elf32_bed
4731#define elf32_bed elf32_i386_sol2_bed
4732
7dc98aea
RO		 4733/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4734 boundary. */
84865015 4735#undef elf_backend_static_tls_alignment
7dc98aea
RO		 4736#define elf_backend_static_tls_alignment 8
4737
a6cc6b3b
RO		 4738/* The Solaris 2 ABI requires a plt symbol on all platforms.
4739
4740 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4741 File, p.63. */
84865015 4742#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 4743#define elf_backend_want_plt_sym 1
4744
84865015
NC		 4745#undef elf_backend_strtab_flags
4746#define elf_backend_strtab_flags SHF_STRINGS
4747
5522f910
NC		 4748/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
4749 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
4750 FALSE otherwise. ISECTION is the best guess matching section from the
4751 input bfd IBFD, but it might be NULL. */
4752
84865015 4753static bfd_boolean
5522f910
NC		 4754elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4755 bfd *obfd ATTRIBUTE_UNUSED,
4756 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4757 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 4758{
4759 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 4760 and sh_link fields of Solaris specific section types. */
4761 return FALSE;
84865015 4762
5522f910 4763 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 4764 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4765
4766http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4767
4768 The following values should be set:
4769
4770Type Link Info
4771-----------------------------------------------------------------------------
4772SHT_SUNW_ancillary The section header index of 0
4773 [0x6fffffee] the associated string table.
4774
4775SHT_SUNW_capinfo The section header index of For a dynamic object, the
4776 [0x6ffffff0] the associated symbol table. section header index of
4777 the associated
4778 SHT_SUNW_capchain table,
4779 otherwise 0.
4780
4781SHT_SUNW_symsort The section header index of 0
4782 [0x6ffffff1] the associated symbol table.
4783
4784SHT_SUNW_tlssort The section header index of 0
4785 [0x6ffffff2] the associated symbol table.
4786
4787SHT_SUNW_LDYNSYM The section header index of One greater than the
4788 [0x6ffffff3] the associated string table. symbol table index of the
4789 This index is the same string last local symbol,
4790 table used by the SHT_DYNSYM STB_LOCAL. Since
4791 section. SHT_SUNW_LDYNSYM only
4792 contains local symbols,
4793 sh_info is equivalent to
4794 the number of symbols in
4795 the table.
4796
4797SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4798 [0x6ffffff5] the section header index of to named strings, the
4799 the associated section header index of
4800 SHT_SUNW_capinfo table, the associated string
4801 otherwise 0. table, otherwise 0.
4802
4803SHT_SUNW_move The section header index of 0
4804 [0x6ffffffa] the associated symbol table.
4805
4806SHT_SUNW_COMDAT 0 0
4807 [0x6ffffffb]
4808
4809SHT_SUNW_syminfo The section header index of The section header index
4810 [0x6ffffffc] the associated symbol table. of the associated
4811 .dynamic section.
4812
4813SHT_SUNW_verdef The section header index of The number of version
4814 [0x6ffffffd] the associated string table. definitions within the
4815 section.
4816
4817SHT_SUNW_verneed The section header index of The number of version
4818 [0x6ffffffe] the associated string table. dependencies within the
4819 section.
4820
4821SHT_SUNW_versym The section header index of 0
4822 [0x6fffffff] the associated symbol table. */
84865015
NC		 4823}
4824
5522f910
NC		 4825#undef elf_backend_copy_special_section_fields
4826#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 4827
a6cc6b3b
RO		 4828#include "elf32-target.h"
4829
bf64a951
L		 4830/* Intel MCU support. */
4831
4832static bfd_boolean
4833elf32_iamcu_elf_object_p (bfd *abfd)
4834{
4835 /* Set the right machine number for an IAMCU elf32 file. */
4836 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4837 return TRUE;
4838}
4839
4840#undef TARGET_LITTLE_SYM
4841#define TARGET_LITTLE_SYM iamcu_elf32_vec
4842#undef TARGET_LITTLE_NAME
4843#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 4844#undef ELF_ARCH
bf64a951
L		 4845#define ELF_ARCH bfd_arch_iamcu
4846
4847#undef ELF_MACHINE_CODE
4848#define ELF_MACHINE_CODE EM_IAMCU
4849
4850#undef ELF_OSABI
4851
4852#undef elf32_bed
4853#define elf32_bed elf32_iamcu_bed
4854
4855#undef elf_backend_object_p
4856#define elf_backend_object_p elf32_iamcu_elf_object_p
4857
4858#undef elf_backend_static_tls_alignment
4859
4860#undef elf_backend_want_plt_sym
4861#define elf_backend_want_plt_sym 0
4862
84865015 4863#undef elf_backend_strtab_flags
5522f910 4864#undef elf_backend_copy_special_section_fields
84865015 4865
bf64a951
L		 4866#include "elf32-target.h"
4867
4868/* Restore defaults. */
4869#undef ELF_ARCH
4870#define ELF_ARCH bfd_arch_i386
4871#undef ELF_MACHINE_CODE
4872#define ELF_MACHINE_CODE EM_386
4873
a27e4371
RM		 4874/* Native Client support. */
4875
4876#undef TARGET_LITTLE_SYM
6d00b590 4877#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 4878#undef TARGET_LITTLE_NAME
4879#define TARGET_LITTLE_NAME "elf32-i386-nacl"
4880#undef elf32_bed
4881#define elf32_bed elf32_i386_nacl_bed
4882
4883#undef ELF_MAXPAGESIZE
4884#define ELF_MAXPAGESIZE 0x10000
4885
4886/* Restore defaults. */
4887#undef ELF_OSABI
4888#undef elf_backend_want_plt_sym
4889#define elf_backend_want_plt_sym 0
4890#undef elf_backend_post_process_headers
a27e4371
RM		 4891#undef elf_backend_static_tls_alignment
4892
4893/* NaCl uses substantially different PLT entries for the same effects. */
4894
4895#undef elf_backend_plt_alignment
4896#define elf_backend_plt_alignment 5
4897#define NACL_PLT_ENTRY_SIZE 64
4898#define NACLMASK 0xe0 /* 32-byte alignment mask. */
4899
4900static const bfd_byte elf_i386_nacl_plt0_entry[] =
4901 {
4902 0xff, 0x35, /* pushl contents of address */
4903 0, 0, 0, 0, /* replaced with address of .got + 4. */
4904 0x8b, 0x0d, /* movl contents of address, %ecx */
4905 0, 0, 0, 0, /* replaced with address of .got + 8. */
4906 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4907 0xff, 0xe1 /* jmp *%ecx */
4908 };
4909
4910static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
4911 {
4912 0x8b, 0x0d, /* movl contents of address, %ecx */
4913 0, 0, 0, 0, /* replaced with GOT slot address. */
4914 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4915 0xff, 0xe1, /* jmp *%ecx */
4916
4917 /* Pad to the next 32-byte boundary with nop instructions. */
4918 0x90,
4919 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4920 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4921
4922 /* Lazy GOT entries point here (32-byte aligned). */
4923 0x68, /* pushl immediate */
4924 0, 0, 0, 0, /* replaced with reloc offset. */
4925 0xe9, /* jmp relative */
4926 0, 0, 0, 0, /* replaced with offset to .plt. */
4927
4928 /* Pad to the next 32-byte boundary with nop instructions. */
4929 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4930 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4931 0x90, 0x90
4932 };
4933
4934static const bfd_byte
4935elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
4936 {
4937 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4938 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4939 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4940 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 4941
4942 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4943 so pad to that size with nop instructions. */
4944 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 4945 };
4946
4947static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
4948 {
4949 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4950 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4951 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4952 0xff, 0xe1, /* jmp *%ecx */
4953
4954 /* Pad to the next 32-byte boundary with nop instructions. */
4955 0x90,
4956 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4957 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4958
4959 /* Lazy GOT entries point here (32-byte aligned). */
4960 0x68, /* pushl immediate */
4961 0, 0, 0, 0, /* replaced with offset into relocation table. */
4962 0xe9, /* jmp relative */
4963 0, 0, 0, 0, /* replaced with offset to start of .plt. */
4964
4965 /* Pad to the next 32-byte boundary with nop instructions. */
4966 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4967 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4968 0x90, 0x90
4969 };
4970
4971static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
4972 {
4973#if (PLT_CIE_LENGTH != 20 \
4974 || PLT_FDE_LENGTH != 36 \
4975 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
4976 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
4977# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
4978#endif
4979 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
4980 0, 0, 0, 0, /* CIE ID */
4981 1, /* CIE version */
4982 'z', 'R', 0, /* Augmentation string */
4983 1, /* Code alignment factor */
4984 0x7c, /* Data alignment factor: -4 */
4985 8, /* Return address column */
4986 1, /* Augmentation size */
4987 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
4988 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4989 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4990 DW_CFA_nop, DW_CFA_nop,
4991
4992 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
4993 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
4994 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4995 0, 0, 0, 0, /* .plt size goes here */
4996 0, /* Augmentation size */
4997 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
4998 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4999 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5000 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5001 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5002 13, /* Block length */
5003 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5004 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5005 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5006 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5007 DW_CFA_nop, DW_CFA_nop
5008 };
5009
765e526c 5010static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
a27e4371
RM		 5011 {
5012 elf_i386_nacl_plt0_entry, /* plt0_entry */
5013 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
a27e4371
RM		 5014 elf_i386_nacl_plt_entry, /* plt_entry */
5015 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 5016 2, /* plt0_got1_offset */
5017 8, /* plt0_got2_offset */
5018 0, /* plt0_got2_insn_end */
a27e4371
RM		 5019 2, /* plt_got_offset */
5020 33, /* plt_reloc_offset */
5021 38, /* plt_plt_offset */
765e526c
L		 5022 0, /* plt_got_insn_size */
5023 0, /* plt_plt_insn_end */
a27e4371
RM		 5024 32, /* plt_lazy_offset */
5025 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5026 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5027 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
f604c2a2 5028 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
a27e4371
RM		 5029 };
5030
5031static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5032 {
f604c2a2
L		 5033 0x90, /* plt0_pad_byte: nop insn */
5034 is_nacl /* os */
a27e4371
RM		 5035 };
5036
64b384e1
RM		 5037static bfd_boolean
5038elf32_i386_nacl_elf_object_p (bfd *abfd)
5039{
5040 /* Set the right machine number for a NaCl i386 ELF32 file. */
5041 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5042 return TRUE;
5043}
5044
a27e4371
RM		 5045#undef elf_backend_arch_data
5046#define elf_backend_arch_data &elf_i386_nacl_arch_bed
5047
64b384e1
RM		 5048#undef elf_backend_object_p
5049#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 5050#undef elf_backend_modify_segment_map
5051#define elf_backend_modify_segment_map nacl_modify_segment_map
5052#undef elf_backend_modify_program_headers
5053#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 5054#undef elf_backend_final_write_processing
5055#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 5056
a27e4371
RM		 5057#include "elf32-target.h"
5058
5a68afcf 5059/* Restore defaults. */
64b384e1 5060#undef elf_backend_object_p
5a68afcf
RM		 5061#undef elf_backend_modify_segment_map
5062#undef elf_backend_modify_program_headers
887badb3 5063#undef elf_backend_final_write_processing
5a68afcf 5064
eac338cf
PB		 5065/* VxWorks support. */
5066
5067#undef TARGET_LITTLE_SYM
6d00b590 5068#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 5069#undef TARGET_LITTLE_NAME
5070#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 5071#undef ELF_OSABI
1587442d
L		 5072#undef ELF_MAXPAGESIZE
5073#define ELF_MAXPAGESIZE 0x1000
a27e4371
RM		 5074#undef elf_backend_plt_alignment
5075#define elf_backend_plt_alignment 4
eac338cf 5076
23209a78
RM		 5077static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5078 {
5079 0x90, /* plt0_pad_byte */
f604c2a2 5080 is_vxworks /* os */
23209a78 5081 };
eac338cf 5082
23209a78
RM		 5083#undef elf_backend_arch_data
5084#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 5085
13285a1b 5086#undef elf_backend_relocs_compatible
eac338cf
PB		 5087#undef elf_backend_add_symbol_hook
5088#define elf_backend_add_symbol_hook \
5089 elf_vxworks_add_symbol_hook
5090#undef elf_backend_link_output_symbol_hook
5091#define elf_backend_link_output_symbol_hook \
9c72ff84 5092 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 5093#undef elf_backend_emit_relocs
5094#define elf_backend_emit_relocs elf_vxworks_emit_relocs
5095#undef elf_backend_final_write_processing
5096#define elf_backend_final_write_processing \
5097 elf_vxworks_final_write_processing
7dc98aea 5098#undef elf_backend_static_tls_alignment
eac338cf
PB		 5099
5100/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5101 define it. */
5102#undef elf_backend_want_plt_sym
5103#define elf_backend_want_plt_sym 1
5104
5105#undef elf32_bed
5106#define elf32_bed elf32_i386_vxworks_bed
5107
5108#include "elf32-target.h"
GDB Binutils - Deliverables
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